NCD003162542_Badin Business Park_Corrective Action_20230131

Badin Business Park LLC
c/o Alcoa Corporation 201 Isabella Street Suite 500 Pittsburgh, PA 15212-5858 USA Tel: [phone]
January 31, 2023
Robert C. McDaniel Facility Management Branch Hazardous Waste Section
North Carolina Department of Environmental Quality
217 West Jones Street Raleigh, North Carolina 27603
Re: Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan Badin Business Park (f/k/a Alcoa - Badin Works) Badin, North Carolina EPA ID: NCD 003 162 542
Dear Mr. McDaniel:
Please find accompanied with this letter an electronic link to access the Alcoa/Badin Landfill
Baseline Ecological Risk Assessment (BERA) Work Plan, dated January 2023. This BERA Work Plan will advance the Baseline Risk Assessment Problem Formulation for the Alcoa/Badin Landfill and address comments received on the Screening Level Ecological Risk Assessment.
The investigation framework outlined in this Work Plan will evaluate whether environmental conditions associated with the landfill pose an unacceptable risk to ecological receptors. A tiered
investigation approach will be used to integrate information into the program adaptively as it becomes available to ensure that data quality objectives are met. The data quality objectives and an overview of the investigation framework are detailed in Section 4. More specifically, Section 4.2.4. summarizes the proposed investigation activity and the associated timeline.
Badin Business Park intends to commence the proposed work beginning in February 2023; the first
tier of analytical work is planned for the 2nd and 3rd quarters of 2023. A technical memorandum will be prepared and submitted to NCDEQ following collection of the Tier I assessment data to report the findings and propose recommendations on the Tier II scope.
Should you have any questions or would like to meet to discuss the Work Plan, please contact Jason Mibroda of Alcoa at (412) 315- 2783 at your convenience.
Respectfully,
Ronald M. Morosky
Director, Corporate Remediation and Technology
cc: Jason Mibroda, Alcoa Corporation Nigel Goulding, EHS Support, LLC

Alcoa/Badin Landfill
Baseline Ecological Risk
Assessment Work Plan
Badin Business Park
Badin, North Carolina
Prepared for:
Badin Business Park, LLC
Prepared by:

January 2023
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
Table of Contents
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Table of Contents
1 Introduction ..........................................................................................................................1
1.1 Purpose and Objectives ...................................................................................................... 3
1.2 Work Plan Framework ........................................................................................................ 4
2 Site Background .....................................................................................................................5
2.1 Site Setting .......................................................................................................................... 5
2.2 Operational History ............................................................................................................. 6
2.3 Environmental Setting ...................................................................................................... 11
2.3.1 Regional Climatic Conditions ............................................................................... 12
2.3.2 Localized Hydrogeology ....................................................................................... 13
2.3.3 Description of Site Habitats ................................................................................. 16
2.4 Summary of Screening-Level Ecological Risk Assessment ................................................ 17
3 Baseline Risk Assessment Problem Formulation .................................................................... 24
3.1 Refined Ecological Conceptual Site Model ....................................................................... 24
3.1.1 Ecological Exposure Areas ................................................................................... 24
3.1.2 Ecological Receptors of Concern ......................................................................... 28
3.1.3 Source Areas ........................................................................................................ 30
3.1.4 Fate and Transport Pathways .............................................................................. 31
3.1.5 Exposure Media and Exposure Pathways ............................................................ 35
3.1.6 Temporal Variability in Exposure Media .............................................................. 36
3.2 Refinement of Constituents of Potential Ecological Concern (Step 3a) ........................... 39
3.2.1 Refined COPEC Screening Process ....................................................................... 40
3.2.2 Summary of Refined COPECs by BERA Exposure Area ........................................ 52
3.2.3 Step 3a Scientific Management Decision Point ................................................... 54
3.3 Planning and Scoping of the BERA (Step 3b) .................................................................... 54
3.3.1 Fate and Ecotoxicity of Primary Constituents of Potential Concern ................... 54
3.3.2 Assessment Endpoints, Risk Questions, and Measurement Endpoints............... 63
4 BERA Conceptual Study Design ............................................................................................. 64
4.1 SLERA Data Gap Analysis................................................................................................... 64
4.2 Conceptual BERA Investigation Approach ........................................................................ 66
4.2.1 Analytical Characterization Data ......................................................................... 70
4.2.2 Bioavailability and Toxicity Assessment .............................................................. 73
4.2.3 Background Characterization .............................................................................. 75
4.2.4 Proposed Timeline and Contingencies ................................................................ 77
5 BERA Risk Analysis Plan ........................................................................................................ 79
5.1 Effects Analysis ................................................................................................................. 79
5.1.1 Direct Contact Exposure Pathways ...................................................................... 79
5.1.2 Wildlife Ingestion Exposure Pathways ................................................................. 83
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5.2 Exposure Analysis ............................................................................................................. 83
5.2.1 Calculation of Exposure Point Concentrations .................................................... 83
5.2.2 Direct Contact Exposure Pathways ...................................................................... 84
5.2.3 Wildlife Ingestion Pathways................................................................................. 84
5.3 Risk Calculation ................................................................................................................. 87
5.4 Uncertainty Analysis ......................................................................................................... 88
5.5 Risk Characterization ........................................................................................................ 88
5.6 BERA Summary and Conclusions ...................................................................................... 89
6 References ........................................................................................................................... 90
List of In-Text Tables
Table 2-1 Average Daily Temperatures by Month and Average Monthly Precipitation Totals at the
Albemarle Airport, North Carolina from 1911 to 2022
Table 3-1 Representative Semi-Aquatic Wildlife Species for Little Mountain Creek
Table 3-2 Representative Terrestrial Wildlife Species for Little Mountain Creek
Table 3-3 Special Status Species That May Occur in Proximity to the Site
Table 3-4 Migratory Birds That May Occur in Proximity to the Site
Table 3-5 Summary of Category 1 and Category 5 COPECs by Exposure Area and Matrix
Table 4-1 Supplemental BERA Investigation Sampling Program Summary
Table 5-1 Data Sources and Key Literature for Estimating Dietary Bioaccumulation
List of Attached Tables
Table 1 Summary of Samples Considered by CEC in SLERA by Event and Matrix
Table 2 Surface Water Ecological Screening Values
Table 3 Sediment Ecological Screening Values
Table 4 Soil Ecological Screening Values
Table 5 Summary of Samples Included in BERA by Event and Matrix
Table 6 Summary Surface Water Screening - Detections in Little Mountain Creek
Table 7 Summary Sediment Screening - Detections in Little Mountain Creek
Table 8 Summary Surface Water Screening - Detections in Upgradient Little Mountain Creek
Table 9 Summary Sediment Screening - Detections in Upgradient Little Mountain Creek
Table 10 Summary Surface Water Screening - Detections in Eastern Drainage Ditch
Table 11 Summary Sediment Screening - Eastern Drainage Ditch
Table 12 Summary Surface Water Screening - Detections in WB Wetland/SB Ditch
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Table 13 Summary Sediment Screening - Detections in WB Wetland/SB Ditch
Table 14 Summary Surface Water Screening - Detections WC Wetland/WC Ditch
Table 15 Summary Sediment Screening - Detections in WC Wetland/WC Ditch
Table 16 Summary Surface Water Screening - Detections in WY Wetland/SB Ditch
Table 17 Summary Soil Screening - Detections in Floodplain Upland Forest
Table 18 Summary Soil Screening - Detections in Substation A
Table 19 Summary Soil Screening - Detections in Substation B
Table 20 Summary Groundwater Screening - Detections in Floodplain
Table 21 Summary Wet Well Screening - Detections in Wet Well
Table 22 Ecological Receptors, Assessment/Measurement Endpoints, and Risk Questions - Little
Mountain Creek
Table 23 Ecological Receptors, Assessment/Measurement Endpoints, and Risk Questions -
Floodplain Wetland/Drainage Receptors
Table 24 Ecological Receptors, Assessment/Measurement Endpoints, and Risk Questions -
Floodplain Wetland/Drainage Receptors
Table 25 Proposed Analytical Suites
Table 26 Proposed Sample Locations
Table 27 List of Exposure Factors and Variables for Dietary Exposure Modeling

List of In-Text Figures
Figure 1-1 ABL BERA Study Extent and Site Location Map
Figure 2-1 ABL BERA Study Extent and Site Location Map
Figure 2-2 Fall 2018 Electromagnetic Conductivity Survey Results
Figure 2-3 Fall 2022 Electromagnetic Conductivity Survey Results
Figure 2-4 North Carolina Physiographic Province Designations
Figure 2-5 ABL Cross-Section
Figure 2-6 Aqueous Phase Stations Considered in the ABL SLERA
Figure 2-7 Solid Phase Stations Considered in the ABL SLERA
Figure 3-1 ABL Ecological Exposure Areas Map
Figure 3-2 Preliminary Little Mountain Creek ECSM
Figure 3-3 Preliminary Little Mountain Creek Floodplain ECSM
Figure 3-4 Groundwater Available Cyanide in Little Mountain Creek Floodplain Monitoring Wells
Figure 3-5 Groundwater Fluoride in Little Mountain Creek Floodplain Monitoring Wells
Figure 3-6 Scatterplot Illustrating Relationship Between 7-Day Antecedent Precipitation Total and
ABL-MW005 Groundwater Fluoride Concentration
Figure 3-7 Aqueous Phase Stations Considered in the BERA Work Plan COPEC Refinement
Figure 3-8 Solid Phase Stations Considered in the BERA Work Plan COPEC Refinement
Figure 3-9 Acute and Chronic Effects Cumulative Probability Distributions of Geometric Mean
Values
Figure 4-1 Proposed Sample Locations
Figure 4-2 Proposed Background Soil Sample Locations

Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
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List of Appendices
Appendix A Refined COPEC Screening by Ecological Exposure Area
Appendix B PCB Congener Profiles
Appendix C Comprehensive Screening Summary
Appendix D Site-Specific Toxicity Testing

Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
Acronyms
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Acronyms
ABL Alcoa/Badin Landfill
ADD average daily dose
AST aboveground storage tank
ATP adenosine triphosphate
AUF area use factor
AVS acid volatile sulfides
BAF bioaccumulation factor
BAZ biologically active zone
BBP Badin Business Park
BCC Birds of Conservation Concern
BCF bioconcentration factor
BERA Baseline Ecological Risk Assessment
bgs below ground surface
BSAF biota-sediment accumulation factors
BTEX benzene, toluene, ethylbenzene, and xylene
BTV background threshold values
CBR critical body residue
CEC Civil & Environmental Consultants, Inc.
COPC constituent of potential concern
COPEC constituent of potential ecological concern
CSM conceptual site model
DOC dissolved organic carbon
DQO data quality objectives
Eco-SSL ecological soil screening levels
ECOS Environmental Conservation Online System
ECSM ecological conceptual site model
EDD electronic data deliverables
EM electromagnetic
EqP equilibrium partitioning
ERA ecological risk assessment
ERAGS Ecological Risk Assessment Guidance for Superfund
ESB Equilibrium Partitioning Sediment Benchmarks
ESBTU equilibrium partitioning sediment benchmark toxic units
ESV ecological screening value
FCV final chronic value
foc fraction of organic carbon
GSD geometric standard deviation
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
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Acronyms
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GW groundwater
HCSM Hydrogeological Conceptual Site Model
HDPE high-density polyethylene
HMW high molecular weight
HQ hazard quotient
IPaC Information for Planning and Consultation
ISS incremental soil sampling
LANL Los Alamos National Laboratory
LMW low molecular weight
LOAEL lowest observed adverse effects level
LOEC lowest observed effect concentration
MATC maximum acceptable toxicant concentration
MDL method detection limit
mg milligrams
mS milliSiemens
NaF sodium fluoride
NAV88 North American Vertical Datum of 1988
NCAC North Carolina Administrative Code
NCDEQ North Carolina Department of Environmental Quality
NHD National Hydrography Dataset
NHP Natural Heritage Program
NOAA National Oceanic and Atmospheric Agency
NOAEL no observed adverse effects level
NOEC no observed effect concentration
NPDES National Pollutant Discharge Elimination System
NRWQC National Recommended Water Quality Criteria
ORNL Oak Ridge National Laboratory
PAH polycyclic aromatic hydrocarbons
PCB polychlorinated biphenyl
POTW publicly owned treatment works
PWR partially weathered rock
RAIS Risk Assessment Information System
RCRA Resource Conservation and Recovery Act
RSL Regional Screening Levels
SAP Sampling and Analysis Plan
SDG sample data group
SEDTOX sediment toxicity
SEM simultaneously extracted metals
SLERA Screening-Level Ecological Risk Assessment
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
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Acronyms
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SMDP scientific management decision points
SPL spent potliner
SQL sample quantitation limit
SQT Sediment Quality Triad
SVOC semi-volatile organic compound
SW surface water
TEC Toxicity Equivalence Concentrations
TEQ Toxicity Equivalency Quotient
TMF toxicity modifying factor
TRV toxicity reference value
UCL upper confidence limit
USEPA United States Environmental Protection Agency
USFWS United States Fish and Wildlife Service
USGS United States Geological Survey
UST underground storage tank
UV ultraviolet
VOC volatile organic compound

Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
Introduction
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1 Introduction
On behalf of Badin Business Park LLC (BBP), a subsidiary of the Alcoa Corporation (Alcoa), EHS Support
LLC (EHS Support) has prepared this Baseline Ecological Risk Assessment (BERA) Work Plan (Work Plan)
for the Alcoa/Badin Landfill (ABL). The ABL BERA is being conducted to support ongoing Resource
Conservation and Recovery Act (RCRA) investigations at the BBP Facility, formally known as Badin
Works. The BBP Facility is located at 293 Highway 740 in Badin, Stanly County, North Carolina. The ABL is
approximately 14 acres in size and received municipal waste from the township, native soils excavated
during various redevelopment activities, and industrial materials associated with the former Main Plant.
The ABL BERA study area (Site) is situated south of the Main Plant and includes the ABL, its adjacent
floodplain, and Little Mountain Creek, a perennial stream situated hydrologically downgradient of the
landfill (Figure 1-1). Operations at the former Main Plant of Badin Works included primary aluminum
smelting, cathode and anode production, and casting.
The BERA is being conducted in accordance with United States Environmental Protection Agency
(USEPA) Ecological Risk Assessment Guidance for Superfund: Process for Designing and Conducting
Ecological Risk Assessments (ERAGS; 1997a). Per USEPA (1997a), the functions of the ERA are to:
• Document whether actual or potential ecological risks exist at the Site.
• Identify which constituents present at the Site pose an ecological risk.
• Generate data to use in evaluating cleanup options.
In addition to ERAGS, other relevant ecological risk guidance documents have been consulted to support
the ABL BERA Work Plan and will be consulted to support the BERA including:
• USEPA Region 4 Ecological Risk Assessment Supplemental Guidance (USEPA, 2018).
• North Carolina Department of Environmental Quality (NCDEQ) Guidelines for Performing
Screening Level Ecological Risk Assessments (SLERA; NCDEQ, 2003).
• Determination of the Biologically Relevant Sampling Depth for Terrestrial and Aquatic Ecological
Risk Assessments (USEPA, 2015a).
• The Role of Screening-Level Risk Assessments and Refining Contaminants of Concern in Baseline
Ecological Risk Assessments (USEPA, 2001a).
• Guidance for the Data Quality Objective Process (USEPA, 2000).
• Principles for Ecological Risk Assessment and Risk Management (USEPA, 1999).
• Guidelines for Ecological Risk Assessment (USEPA, 1998).
ERAGS prescribes an eight-step process for the assessment of ecological risk to support risk
management decision-making. The eight-step process includes several scientific management decision
points (SMDPs) for the risk manager and risk assessment team to evaluate and approve or redirect the
process (USEPA, 1997a). The eight-step ERA process is conducted in a tiered-approach consisting of two
phases of risk assessment:
• SLERA: The SLERA includes Steps 1 and 2 of the ERAGS process and represents a preliminary and
conservative assessment of potential ecological risks to determine if additional steps in the ERAGS process are warranted.
• BERA: The BERA includes Steps 3 through 8 of the ERAGS process. A BERA is conducted to
further characterize site-specific ecological risks and to support risk management and remedial
decision-making for the protection of ecological receptors.
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
Introduction
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Figure 1-1 ABL BERA Study Extent and Site Location Map
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
Introduction
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Civil & Environmental Consultants, Inc. (CEC) submitted a Screening Level Ecological Risk Assessment
Report for the Alcoa/Badin Landfill (ABL SLERA) to NCDEQ on December 22, 2021. The ABL SLERA was
prepared consistent with ERAGS Steps 1 and 2 and was based on data generated during previous RCRA
investigation reports, a visit to the ABL conducted by a CEC ecologist in May 2021, and a waters and
wetland delineation study performed by Carolina Ecosystems, Inc. The delineation resulted in a Notice
of Jurisdictional Determination by the U.S. Army Corps of Engineers, Wilmington District. Screening-level
constituents of potential ecological concern (COPECs) were identified in surface water, sediment,
groundwater, and soil based on conservative exposure assumptions and a screening approach that
pooled the available data by matrix for the entire SLERA study area. The ABL SLERA concluded that there
was insufficient information to dismiss potential ecological risk and recommended further data
gathering or analysis as part of a BERA to better understand ecological risk at the Site.
Toeroek Associates, Inc. (Toeroek Associates), an environmental contractor for USEPA Region 4,
prepared comments on behalf of NCDEQ on August 15, 2022, regarding the ABL SLERA (NCD 003 162
542). BBP responded to NCDEQ’s letter on October 12, 2022, requesting a meeting to discuss an
approach to address the comments through the continuation of the ERA process as outlined in ERAGS
(USEPA, 1997a). A meeting was held on October 26, 2022, between NCDEQ, BBP, EPA Region 4, Toeroek
Associates, CEC, and EHS Support to discuss the ABL SLERA comment responses and path forward for
the ABL BERA. The meeting and subsequent comment responses provided to NCDEQ on November 14,
2022 outlined an approach to streamline the risk assessment process. Rather than revising ABL SLERA,
BBP proposed to advance directly to ERAGS Step 3a, Refinement of Preliminary Chemicals of Potential
Concern, within the BERA framework and conduct focused supplemental BERA investigations to address
outstanding data gaps. This BERA Work Plan is intended to address the comments on the ABL SLERA, as
well as define the objectives for the BERA.
1.1 Purpose and Objectives
The purpose of this BERA Work Plan is to develop a conceptual investigation framework, consistent with
ERAGS, to evaluate whether environmental conditions associated with historical landfilling operations at
the Site pose an unacceptable risk to ecological receptors. The conceptual framework presented in the
baseline problem formulation supports the development of a detailed study design and sampling
approach for agency review and comment.
Specific objectives of this BERA Work Plan include:
• Present a baseline problem formulation to reevaluate the screening-level problem formulation
in the context of new information and analyses conducted to refine the Hydrogeological
Conceptual Site Model (HCSM), synthesize historical information, and address comments on the
ABL SLERA.
• Update the ecological conceptual site model (ECSM) and ecological exposure areas of the Site
and discuss approaches to address identified data gaps through focused supplemental BERA
investigations.
• Refine the list of COPECs identified in the ABL SLERA to identify those COPECs that are most
likely to drive risk management decision-making for the Site to focus and streamline the BERA
process.
• Define assessment endpoints and measurement endpoints for the identified ecological receptor
groups that will be evaluated in the BERA.
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
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• Develop a conceptual study design based on the preliminary BERA Problem Formulation to
collect data to support the evaluation of measurement endpoints in subsequent supplemental
investigations to support the BERA.
• Present a risk analysis plan to guide risk calculations and risk characterization in the BERA using
data and observational information generated as part of the ABL SLERA and previous site
investigations.
1.2 Work Plan Framework
The framework of this BERA Work Plan is comprised of the following components:
• Section 2 – Site Background, which consists of the Site and environmental settings.
• Section 3 – BERA Problem Formulation, which includes descriptions of the nature and extent of
constituents in exposure media at the Site, summary of the ABL SLERA findings, the ECSM,
refinement of the COPECs, and assessment endpoints, risk questions, and measurement
endpoints.
• Section 4 – BERA Conceptual Study Design, which includes an overview of the ABL SLERA data
gaps and NCDEQ comments, the conceptual BERA investigation framework, and data quality
objectives (DQOs).
• Section 5 – BERA Risk Analysis Plan, which includes key components of the effects analysis,
exposure analysis, risk calculation, uncertainty analysis, and risk characterization that will be
investigated as part of the BERA.
• Section 6 – References.
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
Site Background
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2 Site Background
Background information on the BBP Facility and the ABL is provided below. Section 2.1 describes the
Site Setting, which includes information about the location of the Site and its vicinity. Section 2.2
summarizes the operational history of the BBP Facility and ABL. Section 2.3 details the environmental
setting, which includes information about regional climatic conditions, localized hydrogeology, and
aquatic, terrestrial, and transitional habitats identified at the Site. Section 2.4 reviews the findings from
the ABL SLERA prepared by CEC (2021).
2.1 Site Setting
The BBP Facility includes the former Main Plant area, the ABL, and associated parcels (Figure 1-1). The
former Main Plant comprised approximately 123 acres and was built on an area of engineered cut and
fill that was leveled to an elevation of approximately 520 feet relative to the North American Vertical
Datum of 1988 (NAVD88). The elevation increases immediately west of the facility to over 600 feet
NAVD88.
The former Main Plant is bordered by Badin Lake to the east, which is a man-made flooded valley
constructed for generating hydroelectric power in the early 1900s. The Yadkin River is the primary water
source to the reservoir. The reservoir spillway to the Yadkin River is situated approximately 1.5 miles
northeast of the former Main Plant. The average surface water elevation of Badin Lake is approximately
509 feet (NAVD88) based on data from the Cube Hydro™ Carolina’s website1 (corrected for obvious
outliers). The elevation decreases south of the former Main Plant and ABL to less than 470 feet NAVD88
on the floodplain of Little Mountain Creek (Figure 2-1).
The ABL is approximately 14 acres in size and situated in a natural ravine approximately 500 feet
southwest of the former Main Plant (Figure 2-1). The ABL ranges in elevation from approximately 540 ft
to 470 ft (NAVD88). Within the fence line, the ABL is actively maintained with mowing and vegetation
clearing to prevent trees and shrubs from establishing on the landfill surface. The southern portion of
the ABL abuts the floodplain of Little Mountain Creek. The ABL BERA study area is situated south of the
former Main Plant and includes the ABL, its adjacent floodplain, and Little Mountain Creek, a perennial
stream situated hydrologically downgradient of the landfill (Figure 2-1).
The ABL BERA study area follows the ABL fence line to the north and the south/southwestern bank of
Little Mountain Creek to the south. The western extent of the ABL BERA study area within the floodplain
extends from the southwest corner of the fence line to Little Mountain Creek where historical sampling
reflects an absence of suspected site-related constituents. The southeastern extent of the ABL BERA
study area extends from the western terminus within Little Mountain Creek to approximately 1,500 feet
downstream of State Highway 740 (Figure 2-1).

1 Cube Hydro Carolinas – Cube Hydro Carolinas (cubecarolinas.com)
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
Site Background
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2.2 Operational History
Badin Works operated as a primary aluminum reduction facility (commonly referred to as an aluminum
smelter) producing aluminum from 1916 to 2002. Aluminum production was lowered in 2002; however,
Alcoa continued to manufacture anodes and high-purity aluminum at the Badin Works facility until
2007. The original facility configuration consisted of two potlines, an electrode plant used for
manufacturing anodes and cathodes, casting facilities for producing specialty ingot products, a machine
shop, and various office and utility buildings. The potlines were demolished, redesigned, and expanded
during the mid-1960s. The configuration of the former Main Plant remained relatively consistent
following the mid-1960s upgrades until closure. The facility was permanently closed in 2010 and has
since been redeveloped for use as a business park. Since 2012, redevelopment of the former Main Plant
has entailed demolishing several buildings.
Multiple Solid Waste Management Units (SWMUs) were identified at the BBP Facility as a requirement
of an existing RCRA Permit (EPA ID: NCD 003 162 542) as issued by NCDEQ, including landfills housing
spent potliner (SPL) and other industrial derived waste. The ABL was identified as SWMU-2.
The ABL was used for approximately 70 years for the disposal of industrial and municipal waste from
Alcoa and Stanly County until the landfill operations were ceased in 1979. The ABL was covered with soil
and seeded with grass in the late 1970s. Waste materials believed to be deposited in the landfill include
solid refuse, construction debris, process wastes from operations, and municipal waste from the town
and individuals. Upgrades to the landfill that have occurred since the cessation of landfilling operations
are discussed as follows.
In October 1997, the ABL surface was regraded to control run-off and infiltration and make the slopes of
the landfill more suitable for mowing. The cover system consisted of 12 inches of silty clay soil,
compacted to 95 percent, overlain by a 6-inch vegetative layer consisting of silty clay soil combined with
lime and fertilizer. Run-on from high elevation areas was managed by installing both lined and unlined
ditches along the flanks of the ABL that discharge to the floodplain of Little Mountain Creek. Channels
were lined with a 4-inch-thick concrete revetment mat or jut mat and grass. The channels were designed
to accommodate 25-year storm events (Alcoa, 1998). Three seeps were identified at the toe of the ABL
following the completion of the upgrades in the late 1990s.
In June 2000, the construction of a low-flow seep collection system was completed for combining the
three seeps into a single discharge under the BBP Facility’s National Pollutant Discharge Elimination
System (NPDES) permit. In 2005, the discharge was eliminated through the installation of a forced main
to route the seep water to a utility sewer that leads to Stanly County Utilities publicly owned treatment
works (POTW).
In 2016, the existing seep collection system was upgraded to improve overall seep capture and
collection efficiency (Figure 2-1). The previous system collected water from three small seeps in ground
surface collection basins. The basins were prone to flooding and surface water infiltration. This caused
clean surface water to be captured, pumped, and treated. The new system was intended to intercept
water in a below-grade collection trench immediately downgradient of the ABL. In addition, a slurry wall
was installed downgradient of the collection trench. The slurry wall was installed to provide a barrier
against ABL groundwater migrating towards the floodplain and to provide a barrier so clean
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
Site Background
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groundwater from the floodplain would not flow into the collection trench (Power Engineers Inc, 2017;
Figure 2-1).
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
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Figure 2-1 ABL BERA Study Extent and Site Location Map
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
Badin Business Park – Badin, North Carolina
Site Background
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Following installation of the trench and barrier wall, seeps developed upgradient of the collection
trench. In 2017 and 2019, modifications were made to the trench system to collect seeps that developed
on the hillside upgradient of the 2016 collection system (Figure 2-1). The area is currently monitored
annually using geophysical surveys to confirm the efficacy of the remedial measure.
Delineation of the extent of elevated constituent levels in the area downgradient of the ABL and the
effectiveness of the collection trench system is monitored using electromagnetic (EM) surveys to
measure the electrical conductance in soil pore water. This method allows for correlation between
inorganic water chemistry data and data from electrical-based geophysical methods (Benson et al.,
1985). The method can also be used for time-series measurements to evaluate concentration trends
(Benson et al., 1985).
An EM geophysical study was performed quarterly for one year, starting in the second quarter of 2018,
to evaluate the potential for seasonal variability in soil pore water conductivity. The reference baseline
surveys are compared to the subsequent geophysical surveys. Annual surveys are conducted in early fall,
and the results are communicated to NCDEQ; the most recent EM Survey results for 2022 was submitted
to NCDEQ in December 2022.
Contemporary data for groundwater samples from high apparent conductivity areas are not available;
monitoring wells ABL-MW-8 through ABL-MW-13 were abandoned during construction of the collection
trench and groundwater concentration data have not previously been reported. However, groundwater
concentrations for piezometers PZ-15 through PZ-17 are available from the SLERA Report for the ABL
(CEC, 2021b). Piezometers PZ-15 through PZ-17 are located within the footprint of the landfill, and
fluoride concentrations ranged from 8.9 to 77 milligrams per liter (mg/L) between August 2011 and
August 2012 (except one non-detect concentration at PZ-16 in May 2012). Over the same period,
available cyanide ranged from non-detect to 0.014 mg/L. These results indicate that apparent
conductivity provides a useful measure of the spatial extent of impacted groundwater. It is anticipated
that the suites of analyses collected during the BERA process will enable improved calibration of the
apparent conductivity data.
A comparison of apparent conductivity between fall 2018 and fall 2022 is provided in Figure 2-2 and
Figure 2-3, respectively. Results show a notable decrease in the extent of apparent conductivity above
50 milliSiemens per meter (mS/m), which indicates the efficacy of the collection trench.
Alcoa/Badin Landfill Baseline Ecological Risk Assessment Work Plan
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HDPE = high-density polyethylene; PVC = polyvinyl chloride
Figure 2-2 Fall 2018 Electromagnetic Conductivity Survey Results

Figure 2-3 Fall 2022 Electromagnetic Conductivity Survey Results
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2.3 Environmental Setting
This section provides a summary of the environmental setting. Additional details can be found in the ABL
SLERA (CEC, 2021) or in the Hydrogeological Conceptual Site Model Update (HCSM Update; EHS Support,
2022). The BBP Facility is in the Piedmont physiographic province designated as Level III Ecoregion 45
(Griffith, 2002) This ecoregion encompasses the non-mountainous portion of the old Appalachian
Highland, comprised of an erosional terrain of moderately dissected plains with some hills. The
Piedmont physiographic province is characterized by dominant ridgelines that follow the strike of
resistant lithologies, valleys perpendicular to ridgelines that follow regional fault structures and many
small hills cut by streams flowing in a dendritic pattern. Streams are associated with flat-lying alluvial
deposits (alluvium) at the base of valleys. Overall, the ground surface has relatively low relief due to
heavy weathering of the underlying rocks. The intense weathering promotes the collapse of hillsides
resulting in localized colluvium deposits. Rocks underlying the eastern half of the Piedmont (where the
BBP Facility is located) belong to the Carolina Slate Belt (Level IV Ecoregion 45c; Figure 2-4).

Adapted from Griffith (2002)
Figure 2-4 North Carolina Physiographic Province Designations
The Carolina Slate Belt geology is characterized by quaternary to tertiary silty to clayey saprolite and a
variety of other rock types. Rocks of the Carolina Slate Belt were deposited through a combination of
sedimentary processes and fallout from volcanic eruptions (North Carolina Geological Survey, 1985).
Sediments that lithified to form Slate Belt rocks were originally deposited beneath water, likely in a
submarine setting (Feiss, 1982). The North Carolina Geological Survey (1985) describes Carolina Slate
Belt rocks in the former Main Plant and ABL areas as Cambrian age metamudstone and meta-argillite
interbedded with metamorphosed sandstone, conglomerate, and metavolcanic rocks of the Cid
Formation. Regionally, the mudstone grades upward into shale (Stromquist and Sundelius, 1969). The
lithologic variation has produced northeast-southwest trending ridgelines and valleys that follow the
strike of bedding. Carolina Slate Belt rocks in the region are mildly metamorphosed and deformed,
leading to northeast-southwest fold hinge axes in the Facility vicinity that are intersected by
perpendicular faults. The orientations of bedding/fold hinges and the perpendicular fractures broadly
dictate the crisscross pattern of river drainages in the area. The orientation of Little Mountain Creek
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aligns with perpendicular fractures, whereas the perpendicular tributaries follow the strike of bedding
and fold hinges.
Rocks of the Piedmont are heavily weathered at the ground surface due to a combination of high rainfall
and the humid and warm climate. A zone of partially weathered rock (PWR) exists above the
unweathered rock and is characterized by soft to hard rock where joints and fractures are typically
stained, and primary rock minerals are altered in part. PWR grades upward into a zone of residual soils.
In general, residual soils are derived in place from the chemical decomposition (weathering) of primary
minerals in the underlying PWR and bedrock. If weathering results in small volume changes and the
original fabric and most original rock defects are retained, soils are called ‘saprolites’. When the
weathering is accompanied by large volume changes and little or none of the original rock fabric
remains, residual soils are called ‘residual soils’ or ‘massive sub soil’. This weathering process along with
alluvial dynamics in the Little Mountain Creek floodplain have resulted in soils downgradient of the ABL
to predominately consist of Oakboro silt loam. Oakboro silt loam is a floodplain soil comprised of silt
loam underlain with silty clay loam and bedrock. This soil type occurs in floodplains.
2.3.1 Regional Climatic Conditions
The climate of the North Carolina Piedmont is classified as humid, warm temperate. Daily temperature
and precipitation data obtained from the National Oceanic and Atmospheric Administration (NOAA)
National Centers for Environmental Information2 for the Albemarle Airport from June 1911 to October
2022 was summarized. Albemarle is about 5 miles southwest of Badin. There, the average annual daily
minimum and maximum air temperature was 48.2°F and 72.5°F, respectively (Table 2-1). Precipitation is
relatively evenly distributed throughout the year in the region; however late fall is the driest period and
the convective storms in the summer months are responsible for the greatest average monthly
precipitation totals. Average annual precipitation at the Albemarle Airport is 46.2 inches.
Table 2-1 Average Daily Temperatures by Month and Average Monthly Precipitation Totals at
the Albemarle Airport, North Carolina from 1911 to 2022
Month
Average Minimum Daily
Temperature (⁰F)
Average Maximum Daily
Temperature (⁰F)
Average Monthly
Precipitation Totals (in)
January 30.3 52.7 3.6
February 32.2 56.2 3.6
March 38.5 64.2 4.3
April 46.4 73.4 3.5
May 55.2 80.7 3.7
June 63.6 87.3 4.3
July 67.1 89.8 5.5
August 66.1 88.5 4.7
September 60.0 83.2 4.1
October 47.9 74.0 3.1

2 Accessed online at: https://www.ncdc.noaa.gov/cdo-web/datasets/GHCND/stations/GHCND:USC00310090/detail
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Month
Average Minimum Daily
Temperature (⁰F)
Average Maximum Daily
Temperature (⁰F)
Average Monthly
Precipitation Totals (in)
November 37.9 63.8 3.0
December 31.9 54.7 4.6
Annual 48.2 72.5 46.2
2.3.2 Localized Hydrogeology
The following sections describe the regional and site-specific features that influence surface water and
groundwater flow in the region and the Site.
2.3.2.1 Surface Water Hydrology and Watershed Characteristics
The Site is located within the Yadkin-Pee Dee River Basin, in the Mountain Creek sub watershed. The
Yadkin-Pee Dee River Basin is the second-largest river system in North Carolina, covering more than
7,200 square miles. The Pee Dee River eventually discharges into the Atlantic Ocean. The Yadkin River
becomes the Pee Dee River between the confluence of the Pee Dee River and the Badin Lake Dam at the
confluence of the Yadkin River with the Uwharrie River.
Badin Lake is located directly east-northeast of the former Main Plant area (Figure 1-1). Badin Lake is fed
by the Yadkin River, which originates approximately 200 river miles upstream. The Lake is utilized for
public boating and recreational fishing. Badin Lake was created in 1917 through the damming of the
Yadkin River to support the power needs of the town of Badin. The Lake is partially responsible for
groundwater recharge below the Main Plant area; the lake elevation is higher than the groundwater
elevation measured in monitoring wells located adjacent to the lake.
Little Mountain Creek is a first-order perennial stream and tributary of Mountain Creek. Little Mountain
Creek is classified by the DWR as a Water Supply IV (Class WS-IV) water body. No known significant
public use or water withdrawals occur within Little Mountain Creek in the vicinity of the Site. The Class
WS-IV designation extends approximately 2.7 miles upgradient of the Site. The drainage area of Little
Mountain Creek is approximately 5.62 square miles where the stream crosses under State Highway 740.
Little Mountain Creek discharges into Mountain Creek approximately 1.5 miles south-southeast of the
Site. Mountain Creek in turn flows into the Pee Dee River approximately 5.1 miles southeast of the Site.
Little Mountain Creek is hydrologically downgradient from Badin Lake and the Yadkin River. In fact,
Badin Lake is an area of recharge for the BBP Facility and potentially the Site. Details on the interactions
of groundwater across the BBP Facility are provided in the HCSM Update (EHS Support, 2022).
Little Mountain Creek and its floodplain adjacent to the ABL cover approximately 11 forested acres
(Figure 2-1). The Creek is located downgradient approximately 175 to 200 feet southwest of the landfill
perimeter. The two are separated by forested floodplain wetlands. The stream channel is approximately
18 to 20 feet wide, with vertical banks of about 12 to 16 inches tall. The floodplain and tops of the banks
are stabilized with vegetation. Portions of the forested floodplain are seasonally/intermittently flooded
by the Creek.
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Three intermittent stream channels exist between the southern boundary of the ABL and the Creek.
These are identified as Stream SA (Eastern Drainage Ditch), Stream SB (Middle Drainage Ditch), and
Surface Water TA (Western Drainage Ditch), which exist to the southeast, south, and southwest of the
ABL, respectively (Figure 2-1). These features are designated waters of the state based on a Notification
of Jurisdictional Determination provided by the U.S. Army Corps of Engineers – Wilmington District. In
addition to the three intermittent stream channels, six jurisdictional wetlands are also present within
the Little Mountain Creek floodplain adjacent to the Site (Figure 2-1). These features were subject to the
same jurisdictional determination and delineation by Carolina Ecosystems, Inc. The determination was
last revised on February 26, 2020, and is summarized as follows:
The surface water conveyance on the western side of the landfill and stormwater control
measure discharges to uplands in proximity to the jurisdictional surface water feature TA, and
wetland features WA and WD. Surface water feature TA has an intermittent surface water
connection to wetland feature WB and surface water feature SB. Surface water feature SB is
classified by the USACE as a small, intermittent unnamed water feature to Little Mountain Creek.
The surface water conveyance on the eastern side of the landfill and stormwater control
measure discharges to uplands in proximity to surface water feature SA near the southeastern
boundary of wetland feature WC. Surface water feature SA is classified by the USACE as a small,
intermittent unnamed water feature to Little Mountain Creek. This feature is also called the
Eastern Drainage Ditch.
Wetlands WA, WB, WC, WD, WY, and WZ are contained within the floodplain of Little Mountain
Creek and experience regular flow to relatively permanent waters SA and SB and flooding from
Little Mountain Creek. A RPW is defined by the USACE as a tributary that is not a traditional
navigable water and that typically flows year-round or has continuous flow at least “seasonally”
(e.g., typically 3 months). The wetlands are connected via sheet flow through the floodplain as
well as by several man-made features (ditches) and jurisdictional ditch SA and SB.
An Unnamed Tributary to Little Mountain Creek is also present within the BERA study area. The feature
is located directly east of State Highway 740 and parallels the road. The Unnamed Tributary discharges
into Little Mountain Creek immediately downstream of where Little Mountain Creek flows beneath
State Highway 740. The Unnamed Tributary drains portions of the former Main Plant as well as a small
area east of State Highway 740. The NPDES Outfall 005 discharges into the Unnamed Tributary
approximately 300 yards upstream of the confluence of the Unnamed Tributary with Little Mountain
Creek.
2.3.2.2 Site Hydrogeological Units
The stratigraphic units underlying the BBP Facility form a complex hydrogeologic framework that
influences groundwater elevations and groundwater flow. The natural hydrogeology typical of the
Piedmont region has been extensively altered at the BBP Facility throughout the course of historical
operations due to numerous engineered cut and fill activities. Excavation and redistribution of native
soils was implemented to develop the BBP Facility for industrial use, during the original construction and
subsequent upgrades. Subsequent management of the landscape (filling in valleys with excavated native
material), as well as waste management (Onsite Landfill, the West Fill Area, Pine Tree Grove, and the
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ABL) also involved placement of fill. Four major stratigraphic units are present at the BBP Facility. The
four stratigraphic units consist primarily, from land surface down, of:
• Residual soil
• Saprolite
• PWR
• Bedrock
Additionally, alluvial soils are present on the floodplain of Little Mountain Creek. The relationship of
these stratigraphic units at the ABL are shown on Figure 2-5.

Figure 2-5 ABL Cross-Section
Hydrogeologic units are not uniform throughout the BBP Facility, as they have been altered to varying
degrees due to historical cut and fill activities. Residual soils and saprolite characteristic of the region
normally exhibit high storage and limited lateral movement of groundwater as they are high porosity,
low permeability units. Where residual soil and saprolite have been largely removed and replaced with
construction base or fill, precipitation may infiltrate directly into the underlying PWR or bedrock.
Fractures in the PWR and bedrock provide paths for groundwater flow due to their high permeability,
and both units are exposed over a large area of the main plant due to previous cut and fill activities.
Groundwater recharge from Badin Lake is promoted through infiltration into these exposed units on the
lake shore, supplementing recharge from precipitation falling west of the BBP Facility.
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2.3.2.3 Groundwater Occurrence and Flow
Regionally, groundwater recharge occurs through precipitation infiltration into geologic units exposed at
the ground surface. Where present at ground surface, residual soils and saprolite act as groundwater
storage zones due to their high porosity but low permeability, and supply water to underlying PWR,
which has high fracture permeability and is the primary conduit for groundwater flow. This type of
recharge is occurring on the hillsides west of the BBP Facility and ABL, where groundwater flows down
the elevation gradient toward the BBP Facility through the PWR. Additional recharge from the east
toward the BBP Facility is fed by water from Badin Lake infiltrating exposed PWR and fractured rock
units along the shore. Groundwater ultimately flows along fractures in the PWR and bedrock to the
lowest elevations in the BBP Facility vicinity, which occur at the Little Mountain Creek floodplain. The
existing gradient data evaluated as part of the HCSM (EHS Support, 2022) supports potential for
discharge in the vicinity of the Little Mountain Creek floodplain.
Due to engineered cut and fill activities, regional geologic structures have been altered. These activities
have resulted in a removal of saprolite and residual soils, leading to exposure of the PWR and bedrock
throughout a large section of the former Main Plant area. This increased exposure allows for a greater
groundwater mass flux driven by fracture connectivity in the PWR, generally driving the flow toward the
lowest topographical point. Groundwater flow from the former Main Plant area generally flows
southwest toward the ABL due to the regional bedrock orientation (northeast-southwest). Once the
groundwater flows below the ABL in the PWR layer, upward vertical infiltration into the waste material
is limited due to the low permeability saprolite layer between the PWR layer and waste material layer.
However, the saprolite layer has been eroded by fluvial processes at the toe of the ABL, allowing for
groundwater to discharge through this thin layer and into the overlying alluvium. Upward vertical
groundwater flow to the Little Mountain Creek floodplain is evidenced by the strong upward vertical
groundwater gradients in this area and is promoted by the geologic pathway provided by fluvial erosion.
2.3.3 Description of Site Habitats
Three distinct areas exist south of the former Main Plant area within the ABL BERA study area: the ABL,
the Little Mountain Creek floodplain, and Little Mountain Creek. These areas each have distinct
attributes that affect habitat provided to terrestrial, aquatic, and semi-aquatic receptors.
The area of the ABL within the fence line consists of approximately 17 acres of terrestrial
grasslands/early successional meadow habitat. This area is maintained by periodic mowing to ensure
that trees or shrubs do not become permanently established and affect the landfill cover material. The
required maintenance to ensure the landfill cover is not compromised limits the ability for this area to
provide persistent, year-round habitat to a diverse assemblage of terrestrial receptors. No birds or
mammals were observed during the Site visit conducted by CEC as part of the ABL SLERA.
The Little Mountain Creek floodplain is a transitional floodplain habitat consisting of a bottomland forest
with dissected wetlands which are intermittently/seasonally flooded by Little Mountain Creek. The
floodplain has a relatively shallow water table at several locations, resulting in hydric soil conditions.
Three forest subtypes exist within the floodplain, mature second-growth broad-leaf deciduous forest,
mature second-growth mixed evergreen/broad-leaf deciduous forest, and immature broad-leaf
deciduous woodlands recovering from land clearing. The mature, second-growth broad-leaf deciduous
forest is the dominant forest type and comprises approximately 90 percent of the Little Mountain Creek
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forested floodplain area. The flora community present was similar to the plant community description of
a Typic Piedmont Headwater Stream Forest (Schafale 2012). Dominant trees identified during the
ecological reconnaissance conducted by CEC for the ABL SLERA include Liriodendron tulipifera (tulip
poplar), Liquidambar styraciflua (sweetgum), Acer rubrum (red maple), and Ulmus americana (American
elm). Pinus taeda (loblolly pine) were also observed adjacent to the wetlands in the northwestern
portion of the floodplain. The understory woody species identified by CEC included immature Acer
rubrum and Liquidambar styraciflua trees along with Carpinus caroliniana (ironwood). Ligustrum sp.
(privet) was also present along with native vines.
In wetland areas observed by CEC during the early part of the growing season, the plant communities
were dominated by Glyceria striata (fowl manna grass) and Carex spp. (sedges). Later in the growing
season, it is possible that the observed Microstegium vimineum (Japanese stiltgrass) could also become
an abundant wetland species. The mixed coniferous/broad-leaf deciduous that was observed in the
northwest portion of the floodplain was dominated by Pinus taeda and Quercus phellos (willow oak) and
exhibited similar flora communities to those found in a Wet Piedmont Longleaf Pine Forest (Schafale
2012). Dense canopy cover throughout most of the floodplain offers shaded conditions with
intermittent sunlight on the forest floor. The early successional forest was observed on the southeastern
corner of the floodplain where historical land clearing occurred. The flora community here was similar to
that observed elsewhere on the floodplain. A detailed review of specific flora identified during site
reconnaissance is provided in the ABL SLERA (CEC, 2021).
Three stormwater conveyance ditches are also present in the floodplain (Stream SB, Stream SA, and
Surface Water TA) and provide a poor habitat for both aquatic and terrestrial species due to ephemeral
flow and lack of vegetation and accumulated sediment. At the time of site reconnaissance performed by
CEC, wildlife activity within the floodplain may have been suppressed by rainfall and cool temperatures.
Troglodytes hiemalis (winter wren), Cyanocitta cristata (blue jay), Turdus migratorius (American robin),
and Cardinalis cardinalis (Northern cardinal) were observed in the forest. Tracks, trails, and scat of
Odocoileus virginianus (white-tailed deer) were also observed.
Little Mountain Creek is a first-order perennial stream that is 18 to 20 feet wide with a moderate
gradient and flow velocity. The habitat is dominated by alternating pool/riffle sequences. The riffle
substrate consists of gravel, cobble, and large sand with some boulders, with a typical depth of 4 to 6
inches. The pool substrate consists of sand with some silt, with typical depths of 12 to 18 inches.
Instream cover was generally low. During the CEC site reconnaissance, one trichopteran (caddisfly), two
plecopteran (stonefly), one decapod (Cambarus sp.), and one Northern dusky salamander
(Desmognathus fuscus fuscus) were observed. Fish were not observed during the Site reconnaissance,
although riffle-obligate species likely occur in this stream. Gamefish are unlikely to be present in this
headwater stream.
2.4 Summary of Screening-Level Ecological Risk Assessment
The ABL SLERA (CEC, 2021) was conducted using the results of numerous previous investigations and a
Site reconnaissance to provide a preliminary assessment of potential risks to ecological receptors that
may be exposed to Site constituents in groundwater, soil, sediment, and surface water. The SLERA was
informed based on information obtained from the following investigations/reports:
• Phase 3 - Engineering Data Collection for the Corrective Measures Study. Badin Works Facility,
Badin, North Carolina dated October 31, 2012 (Environeering, 2012).
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• Alcoa Badin Landfill and Former Ball Field Sampling Activities. Former Badin Works Facility,
Badin, North Carolina dated September 15, 2015 (Environeering, 2015).
• Investigative Report for the Little Mountain Creek Area dated December 5, 2018 (Environeering,
2018).
• Approved Jurisdictional Determination Request dated March 4, 2019 and revised April 15, 2019
and October 9, 2019 (Carolina Ecosystems, 2019a, b, c).
• Little Mountain Creek Confirmatory Sampling Report dated May 28, 2019 (BBP, 2019).
• Investigation Summary Report for the Alcoa/Badin Municipal Landfill; Task 1 – Subtask 2 –
Hydrologic Conditions dated December 20, 2019 (Environeering, 2019).
• Investigation Summary Report for the Alcoa/Badin Municipal Landfill; Task 1 – Subtask 1 –
Surface Water Assessment dated February 2020 (CEC, 2020a).
• United States Army Corps of Engineers (USACE) Notice of Jurisdictional Determination Request
dated February 26, 2020 (USACE, 2020).
• Data Summary – Little Mountain Creek Quarterly Surface Water Sampling Events dated April 13,
2020 (BBP, 2020).
• Surface Water Sampling Report for the Alcoa/Badin Landfill and Little Mountain Creek dated
September 23, 2020 (CEC, 2020b).
• Surface Water Sampling Report for the Alcoa/Badin Landfill and Little Mountain Creek dated
January 5, 2021 (CEC, 2021).
The ABL SLERA Problem Formulation included a preliminary ECSM that was developed for aquatic and
terrestrial exposure areas. The preliminary ECSM described potential sources of constituents, release
mechanisms, exposure media, representative receptor groups, and the complete exposure pathways for
each receptor/medium combination. This information was reviewed in detail and refined based on the
Baseline Risk Assessment Problem Formulation provided in Section 3.
The following potential exposure pathways were identified as potentially complete and significant and
thus were quantitatively evaluated in the SLERA:
• Direct contact with surface soil by terrestrial plants, soil invertebrates, and amphibians;
• Ingestion of surface soil by soil invertebrates, reptiles, and upland birds and mammals;
• Direct contact with sediment by aquatic plants, aquatic/benthic invertebrates, amphibians, and
fish;
• Ingestion of sediment by aquatic/benthic invertebrates, reptiles, fish, and semi-aquatic birds
and mammals;
• Direct contact with surface water and groundwater via surface water by aquatic plants, aquatic
invertebrates, amphibians, reptiles, and fish;
• Ingestion of surface water and groundwater via surface water by terrestrial and aquatic wildlife;
and
• Ingestion of biota by terrestrial and aquatic wildlife.
Based on the review of the historical processes and data collected during the SLERA, COPECs were
identified in surface water, sediment, groundwater, and soil to which ecological receptors could
potentially be exposed. COPECs were identified in the exposure analysis presented in the ABL SLERA,
which assumed maximum exposure scenarios based on comparisons of maximum exposure point
concentrations to the most conservative ecological screening values (ESVs; i.e., the minimum ESV)
obtained from the Region 4 Guidance (USEPA, 2018). Surface water samples were additionally screened
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against the 15A North Carolina Administrative Code (NCAC) Subchapter 2B, Freshwater Surface Water
Quality Standards for Class C Waters.
Stations sampled for aqueous (surface water and groundwater) and solid phase (sediment and soil)
matrices included in the ABL SLERA screening process are illustrated in Figure 2-6 and Figure 2-7,
respectively. A detailed summary of the analyses conducted by sample, event, and matrix is provided in
Table 1 (attached).
Constituents were retained as COPECs for a certain media if the maximum exposure point concentration
detected in the media exceeded the most conservative ESV, indicating that a potential ecological risk
may be present in the media as a result of the presence of the COPEC. Exceedance of ESVs does not
explicitly identify whether there are adverse effects occurring due to that COPEC; however, it does
indicate that further investigation may be necessary to determine potential ecological effects. If the
maximum exposure point concentration did not exceed the conservative ESV, it was concluded that
potential ecological risk was not unacceptable in that environmental media as a result of the constituent
and that constituent was not retained as a COPEC.
The comparison of maximum site exposure point concentrations to ESVs resulted in several constituents
being retained from the ABL SLERA for further evaluation during the BERA. Categories were assigned
following NCDEQ guidance based on the following logic:
• Category 1 – Constituents whose maximum detection exceeds the media specific ESV.
• Category 2 – Constituents that generated a laboratory sample quantitation limit (SQL) that
exceeds the USEPA Region 4 media-specific ESV for that constituent.
• Category 3 – Constituents that have no USEPA Region 4 ESV but were detected above the
laboratory SQLs.
• Category 4 – Constituents that were not detected above the laboratory SQLs and have no USEPA
Region 4 ESV.
• Category 5 – Constituents whose SQL or maximum detection exceeds the NCDEQ Surface Water
Quality Standards.
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Figure 2-6 Aqueous Phase Stations Considered in the ABL SLERA
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Figure 2-7 Solid Phase Stations Considered in the ABL SLERA
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Screening results from the ABL SLERA (CEC, 2021) are provided as follows by matrix.
Constituent categories assigned by CEC (2021) across the SLERA study area for surface soil include:
• Category 1: A total of six inorganics (cadmium, chromium, cyanide, fluoride, lead, and mercury),
two SVOCs (benzoic acid and total high molecular weight polycyclic aromatic hydrocarbons [total
HMW PAHs]), and total polychlorinated biphenyls (PCBs) were quantified in surface soil at
exposure point concentrations exceeding their respective soil ESVs; calculated HQs > 1;
• Category 2: A number of COPCs (VOCs, SVOCs, and selenium) were not quantified in surface soil,
but their maximum MDLs exceeded the soil ESVs; calculated HQs > 1;
• Category 3: A number of PAHs and a PCB Aroclor 1260 have no individual EPA Region IV
ecological screening values, but were detected above the MDLs;
• Category 4: A number of COPCs (VOCs and SVOCs) were not detected above the MDL and have
no available ESVs that were identified in surface soil; and
• Category 5: Not applicable.
Constituent categories assigned by CEC (2021) across the SLERA study area for surface sediment include:
• Category 1: A number of COPCs (PAHs, total HMW PAHs, total PCBs, arsenic, barium, and
chromium) were quantified in sediment at exposure point concentrations exceeding their
respective sediment ESVs; calculated HQs > 1;
• Category 2: A number of COPCs (VOCs and SVOCs) were not quantified in sediment, but their
maximum MDLs exceeded the sediment ESVs; calculated HQs > 1;
• Category 3: A number of COPCs (cyanide and PCB congeners) have no individual EPA Region IV
ecological screening values, but were detected above the MDLs;
• Category 4: A number of COPCs (VOCs, SVOCs, PAHs, individual PCB Aroclors, PCB congeners, and
fluoride) were not detected above the MDL and have no available ESVs that were identified in
sediment; and
• Category 5: Not applicable.
Constituent categories assigned by CEC (2021) across the SLERA study area for surface water include:
• Category 1: A total of three inorganics (available cyanide, lead, and fluoride), four PAHs
(benzo(a)anthracene, benzo(a)pyrene, benzo(k)fluoranthene, and chrysene), and total PCBs were
quantified in surface water at exposure point concentrations exceeding their respective surface
water ESVs; calculated HQs > 1;
• Category 2: A number of COPCs (VOCs, SVOCs, PAHs, pesticides, cadmium, and mercury) were
not quantified in surface water, but their maximum MDLs exceeded the surface water ESVs;
calculated HQs > 1;
• Category 3: A number of COPCs (total cyanide, bromide, sulfate, and PCB congeners) have no
individual EPA Region IV ecological screening values, but were detected above the MDLs;
• Category 4: A number of COPCs (VOCs, SVOCs, individual PCB Aroclors, PCB congeners,
pesticides, and silver) were not quantified above the MDLs and have no available surface water
ESVs that were identified in surface water; and
• Category 5: A number of COPCs (pesticides, cadmium, total cyanide, lead, mercury, silver, and
fluoride) had an MDL or maximum detection that exceeded the NC Surface Water Quality
Standards.
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Constituent categories assigned by CEC (2021) across the SLERA study area for groundwater include:
• Category 1: Five COPCs (bis(2-Ethylhexyl)phthalate, total PCBs, cobalt, available cyanide, and
fluoride) were quantified in groundwater at exposure point concentrations exceeding their
respective surface water ESVs; calculated HQs > 1;
• Category 2: A number of COPCs (VOCs, SVOCs, PAHs, and metals) were not quantified in
groundwater, but their maximum MDLs exceeded the surface water ESVs;
• Category 3: Two COPCs (total cyanide and total organic carbon) has no individual EPA Region IV
ecological screening value, but was detected above the MDLs;
• Category 4: A number of COPCs (VOCs, SVOCs, individual PCB Aroclors, and silver) were not
quantified above the MDLs and have no available surface water ESVs that were identified in
groundwater; and
• Category 5: Ten COPCs (ethyl parathion, cadmium, copper, total cyanide, fluoride, lead, mercury,
nickel, selenium, and silver) had an MDL or maximum detection that exceeded the NC Surface
Water Quality Standards.
The ABL SLERA (CEC, 2021) concluded that information is limited and therefore, the potential for
adverse ecological effects at the Site could not be ruled out within the SLERA study area. Thus,
additional evaluation was deemed to be warranted. The lines of evidence to support this SMDP were as
follows:
• The quantification of COPC concentrations in the surface soil, sediment, surface water, and
groundwater at this Site that exceed USEPA Region 4 screening values;
• The number of COPCs not quantified above MDLs, but whose maximum MDLs exceed USEPA
Region 4 screening values;
• The presence of COPCs with no USEPA Region 4 screening values for applicable environmental
media; and
• The absence of analytical data for portions of the Site.
Multiple sources of uncertainty were identified during the completion of the SLERA, which will be
addressed through the completion of the BERA. These sources include issues with data completeness,
spatial distribution of data, sampling location reporting, sample collection methods, and lack of
acceptable screening criteria due to limited information. NCDEQ addressed these issues and others
present in the SLERA through comments submitted by NCDEQ to BBP on August 15, 2022. These
comments and data gaps will be addressed during the BERA Work Plan and BERA in lieu of completing
and submitting a revised SLERA.
General comments prepared by Toeroek Associates on the ABL SLERA that will be incorporated into this
BERA Work Plan are as follows:
• Present a comprehensive conceptual site model (CSM).
• Present the basis for the chemicals of potential concern (COPCs) and identify which sample
locations were included in the SLERA dataset.
• Develop a data gaps section that addresses data gaps in the nature and extent of sampling.
• Identify major uncertainties in the sample coverage and/or data quality issues.
• Present a basis for Step 3 in the ERA process.
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3 Baseline Risk Assessment Problem Formulation
The purpose of the baseline problem formulation is to re-evaluate the screening-level problem
formulation in the context of new information and findings of analyses conducted as part of the HCSM
and the SLERA. As an initial step of the baseline problem formulation, the ECSM was refined to identify
exposure areas and receptor groups to focus the BERA study design. As Step 3a of the baseline problem
formulation, COPECs identified in the SLERA were refined to focus the BERA on those constituents that
are most likely to pose risks to ecological receptors at the Site (USEPA, 2018). In the planning and
scoping phase of the baseline problem formulation (Step 3b), the potential ecological effects of primary
COPECs are described and assessment endpoints, risk questions, and measurement endpoints are
established to guide the development of the conceptual BERA study design (Section 4). The following
sections present the preliminary baseline problem formulation based on the outcome of the SLERA and
development of a Site HCSM.
3.1 Refined Ecological Conceptual Site Model
Based on the findings of the ABL SLERA, HCSM, and previous site investigations, the preliminary ECSM
was refined to incorporate new information fundamental to the effective and efficient design of
additional data collection activities to support the BERA. Key elements of the preliminary ECSM that
were refined in the BERA Problem Formulation include:
• Exposure areas: Ecological exposure areas were defined based on the outcome of the ABL SLERA
to represent the habitat types and receptor groups that may be present and exposed to COPECs
in exposure media.
• Ecological receptor categories: Additional ecological receptor categories and representative
receptor species, including updated queries of special status species (e.g., rare, threatened, and
endangered species), were identified in the refined ECSM.
• Exposure pathways: Potential exposure pathways were re-evaluated based on the HCSM and
SLERA findings to assess fate and transport properties of COPECs that may influence mobility,
bioavailability, or exposure routes for receptor categories.
• Bioavailability: The refined ECSM includes an evaluation of the site characteristics that may
influence the bioavailability and toxicity of primary COPECs in site exposure media.
• Bioaccumulation/biomagnification: The relative importance of COPECs that bioaccumulate or
biomagnify were evaluated in the refined ECSM to identify potential data gaps that may be
addressed in the BERA.
The following sections present the refined ECSM for the BERA problem formulation.
3.1.1 Ecological Exposure Areas
Ecological exposure areas were defined to represent primary habitat types and receptor groups that
may be exposed to COPECs in exposure media. Ecological exposure areas were grouped into three broad
categories based on habitat types:
• Little Mountain Creek (permanent aquatic)
• Little Mountain Creek Floodplain Wetlands/Drainages (transitional)
• Little Mountain Creek Floodplain Uplands (terrestrial)

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The following sections describe the categories of ecological exposure areas identified for the BERA
Problem Formulation. The spatial extents of ecological exposure areas are illustrated in Figure 3-1.
The area of the RCRA cap and landfill within the fence line was described in the ABL SLERA (CEC, 2021)
as containing terrestrial grasslands/early successional meadow habitat. Because this area is maintained
by periodic mowing to ensure that trees or shrubs do not become permanently established and affect
the landfill cover material, it is not considered to provide persistent, year-round habitat. The landfill
cover material was installed in accordance with the NCDEQ-approved Interim Measures Work Plan
(Alcoa, 1997). The cap included 12 inches of Common Fill Type E (soil mixture of silt and clay) overlain
with 6 inches of a vegetative layer. The Common Fill Type E was obtained from a borrow location in New
London, North Carolina. Given the location of the borrow area, it is not anticipated that any Site-related
constituents would be present in the overlying fill material. Therefore, no further assessment of the Site
within the fence line is proposed as part of the BERA Work Plan and BERA.
3.1.1.1 Little Mountain Creek
Little Mountain Creek is the only permanent aquatic habitat feature within the ABL BERA study area. As
discussed in Section 2.3.2.1, Little Mountain Creek is a first-order perennial stream with a moderate
gradient and flow velocity. The channel is generally 18 to 20 feet wide with water depths ranging from 4
to 6 inches in riffles and 12 to 18 inches in pools. Riffle substrates are generally coarse-grained
consisting of some boulders, cobble, gravel, and coarse sand; pool substrates consist of sand with some
silt. In-stream ecological receptors within Little Mountain Creek likely include an epifaunal benthic
invertebrate community, herptiles (amphibians and reptiles), and riffle-obligate forage fish species.
Upper trophic fish species, including gamefish, are unlikely to be present. Semi-aquatic birds (e.g.,
belted kingfisher) and mammals (e.g., raccoon) may use Little Mountain Creek for foraging.
3.1.1.2 Floodplain Wetlands/Drainages
Wetland and drainage features on the Little Mountain Creek floodplain represent transitional habitats
between aquatic and terrestrial exposure areas Figure 3-1. Six jurisdictional wetland areas comprising
approximately 2.25 acres were delineated on the Little Mountain Creek floodplain within the BERA study
area (CEC, 2021). At the time of the CEC site reconnaissance (May 2021), most wetland features were
inundated with shallow surface water or a shallow depth to groundwater. Vegetation in wetland
features was dominated by sedges (Carex sp.) and fowl mannagrass (Glyceria striata), with willow (Salix
sp.) and cattail (Typha sp.) also dominant in the eastern portion of Wetland WC near the Eastern
Drainage Ditch (Figure 3-1). In addition to the wetland plant community, these wetland features likely
support a limited benthic invertebrate community (e.g., Isopoda, Odonata) and may be important
seasonal breeding areas for amphibians and other herptiles. However, given the intermittent hydrology,
it is unlikely that permanent aquatic communities would be established within these wetland features.
In addition to the wetland features, three intermittent stormwater conveyance ditches, the
jurisdictional ditches (Stream SB, Stream SA, and Surface Water TA), are located within the Little
Mountain Creek floodplain adjacent to the ABL (Figure 3-1). Given the intermittent hydrology, these
features likely provide temporary aquatic habitat that would not be sufficient to sustain permanent
aquatic communities.
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3.1.1.3 Floodplain Uplands
Upland portions of the Little Mountain Creek include a forested floodplain exposure area and two
exposure areas adjacent to substations in the eastern portion of the ABL BERA study area, the Adjacent
Substation A and Adjacent Substation B exposure areas (Figure 3-1). The floodplain forest exposure area
consists of a bottomland forest with two primary forest subtypes (CEC, 2021):
• Mature second-growth broad-leaf deciduous forest: This forest type covered the largest portion
of the floodplain. Dominant canopy species include tulip poplar (Liriodendron tulipifera),
sweetgum (Liquidambar stryaciflua), red maple (Acer rubrum), and American elm (Ulmus
americana); dominant subcanopy and understory species include American hornbeam (Carpinus
caroliniana), privet (Ligustrum sp.), red maple, and sweet gum.
• Mature second-growth mixed evergreen/broad-leaf deciduous forest: This forest type was
observed in the northwest portion of the floodplain and extends off-site to the west of the ABL
BERA study area. Loblolly pine (Pinus taeda) is the dominant canopy species and willow oak
(Quercus phellos) is the subdominant species.
In addition to forest plant communities, the floodplain forest area likely supports a soil/litter
invertebrate community, and multiple trophic groups of birds and mammals. As discussed in Section
2.3.3, wildlife observed during the CEC Site reconnaissance included various species of passerine birds
and indicators of large mammals (e.g., white-tailed deer).
Two additional exposure areas were identified in upland portions of the Little Mountain Creek floodplain
adjacent to two electrical substations to the south and southwest of the ABL (Figure 3-1). Adjacent
Substation A exposure area is located to the southeast of Substation A. Habitats and representative
ecological receptor groups within this exposure area are likely consistent with the mature second-
growth broad-leaf deciduous forest described above that covers the greatest portion of the Little
Mountain Creek floodplain.
The Adjacent Substation B exposure area is located to the southeast of Substation B (Figure 3-1).
Habitats within this area are likely consistent with the immature broad-leaf deciduous woodland
described in the ABL SLERA (CEC, 2021). This area was reportedly cleared of trees and is currently an
early successional stage forest with similar, but less mature dominant species as the mature broad-leaf
deciduous forest (e.g., tulip poplar, sweetgum, red maple, American elm). This exposure area likely
supports a similar soil/litter invertebrate community, and multiple trophic groups of birds and
mammals. However, the absence of a subcanopy and understory may limit the value of this habitat for
wildlife cover and foraging relative to the adjacent mature forest.

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Figure 3-1 ABL Ecological Exposure Areas Map
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3.1.2 Ecological Receptors of Concern
Ecological exposure areas identified in Section 3.1.1 may support multiple trophic levels of receptors of
concern. Aquatic receptors of concern that may use habitats within Little Mountain Creek and will be
quantitatively evaluated in the BERA are summarized in Figure 3-2. Terrestrial and transitional receptors
that may use habitats within the Little Mountain Creek floodplain and will be quantitatively evaluated in
the BERA are summarized in Figure 3-3.
Several surrogate species were identified as representative species to evaluate exposure to mammalian
and avian receptors based on feeding guild in the BERA. Representative semi-aquatic wildlife species for
each receptor group to evaluate potential exposure within the Little Mountain Creek exposure area are
summarized in Table 3-1.
Table 3-1 Representative Semi-Aquatic Wildlife Species for Little Mountain Creek
Receptor Group Scientific Name Common Name
Mammalian Fauna
Omnivorous Mammal Procyon lotor Raccoon
Avian Fauna
Piscivorous Bird Megaceryle alcyon Belted Kingfisher
Representative terrestrial species for each receptor group based on feeding guild are provided in Table
3-2.
Table 3-2 Representative Terrestrial Wildlife Species for Little Mountain Creek
Receptor Group Scientific Name Common Name
Mammalian Fauna
Herbivorous Mammal Microtus pennsylvanicus Meadow Vole
Insectivorous Mammal Blarina brevicauda Northern Short-tailed Shrew
Carnivorous Mammal Mustela frenata Long-tailed Weasel
Avian Fauna
Herbivorous Bird Zenaida macroura Mourning Dove
Invertivorous Bird Scolopax minor Woodcock
Carnivorous Bird Buteo jamaicensis Red-tailed Hawk
A search for federally listed species of concern was conducted on November 14, 2022, using the United
States Fish and Wildlife Service (USFWS) Environmental Conservation Online System (ECOS3) Geographic
Information System data and USFWS Information for Planning and Consultation (IPaC4). The results
identified one federally listed Endangered species (Schweinitz’s sunflower [Helianthus schweinitzii]) and
one Proposed Endangered species (Tricolored bat [Perimyotis subflavus]) that may be present at or in
the vicinity of the Site. One federal Candidate species was also identified. No threatened species were

3 https://ecos.fws.gov/ecp/services
4 https://ipac.ecosphere.fws.gov/
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identified as occurring at the Site. An additional search of the federally identified species using the North
Carolina Natural Heritage Program (NHP) species/community search for Stanly County on December 18,
2022, identified the status of each species in North Carolina. The species identified by the federal
search, as well as North Carolina status are presented in Table 3-3.
Table 3-3 Special Status Species That May Occur in Proximity to the Site
Scientific Name Common Name Federal Status North Carolina Status
Mammals
Perimyotis subflavus Tricolored bat Proposed Endangered Significantly Rare
Invertebrates
Danaus plexippus Monarch butterfly Candidate Not listed
Plants
Helianthus schweinitzii Schweinitz's sunflower Endangered Endangered
The ABL SLERA identified Northern long-eared bat (Myotis septentrionalis) and Schweinitz’s sunflower as
federally threatened and endangered species, respectively, based on an USFWS IPaC query conducted
on May 26, 2021 (CEC, 2021). On November 29, 2022, USFWS reclassified Northern long-eared bat as
federally endangered; however, the Site is not located within the current geographic range identified by
USFWS for Northern long-eared bat. As a result, the Northern long-eared bat was not identified in the
recent USFWS IPaC query.
The ABL SLERA concluded that habitat presented within the ABL BERA study area is not suitable for
Schweinitz’s sunflower based on species-specific habitat requirements and site observations (CEC,
2021). Schweinitz’s sunflower prefers full to partial sun in poor soils, such as thin clays. The Floodplain
Upland exposure area is fully to partially shaded and characterized by rich, wet mesic to mesic soils.
Therefore, it is unlikely that habitats within the Floodplain Forest area are suitable to support
Schweinitz’s sunflower.
Tricolored bat (Perimyotis subflavus) was proposed as a federally endangered species by USFWS on
September 13, 2022. This proposed listing was after the May 2021 USFWS IPaC query; therefore, this
species was not identified as a species of concern in the ABL SLERA. The federal status of tricolored bat
will be reviewed throughout the BERA process and updated accordingly.
The USFWS IPaC search did not note the presence of any critical habitat on Site, but it did identify ten
migratory USFWS Birds of Conservation Concern (BCC) (or birds that warrant special attention) that may
occur. These species are summarized in Table 3-4.
Table 3-4 Migratory Birds That May Occur in Proximity to the Site
Scientific Name Common Name Breeding Season
Haliaeetus leucocephalus Bald Eagle 9/1 - 7/31
Coccyzus erythropthalmus Black-billed Cuckoo 5/15 - 10/10
Chaetura pelagica Chimney Swift 3/15 - 8/25
Antrostomus vociferus Eastern Whip-poor-will 5/1 - 8/20
Oporornis formosus Kentucky Warbler 4/20 - 8/20
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Scientific Name Common Name Breeding Season
Dendroica discolor Prairie Warbler 5/1 - 7/31
Protonotaria citrea Prothonotary Warbler 4/1 - 7/31
Melanerpes erythrocephalus Red-headed Woodpecker 5/10 - 9/10
Euphagus carolinus Rusty Blackbird Breeds Elsewhere
Hylocichla mustelina Wood Thrush 5/10 - 8/31
3.1.3 Source Areas
Operations at the former Main Plant of Badin Works included primary aluminum smelting, cathode and
anode production, and casting. In the smelting process, alumina (aluminum oxide) is reduced to
aluminum metal in carbon-lined, steel electrolytic cells known as “pots”. The alumina is reduced to
aluminum in an electrolytic bath solution that contains molten sodium fluoride and aluminum fluoride.
The carbon in the anode and cathode within the pot act as electron donors and degrade over time.
Cathodes and anodes are made of calcined carbonaceous materials (e.g., anthracite, graphite,
petroleum coke) blended with coal-tar pitch. Cathodes are pressed or compacted overtop of refractory
bricks that line the steel pot and the anodes are on top of the pot. Over time, the lining of the pot
degrades and must be removed and replaced. The resulting material, SPL, is regulated as waste (K088)
by USEPA under 40 Code of Federal Regulations.
The residual materials generated through these industrial processes contain metals, PAHs, and inorganic
compounds, notable cyanide, and fluoride. Depending on the raw materials and processes used for
anode production, cathode production, and casting, other semi-volatile organic compounds and/or
volatile organic compounds (SVOCs and VOCs) may also have been present at the BBP facility. The
primary constituent of interest described in the RCRA Facility Investigation Report (MFG, Inc., 2001) was
cyanide. Cyanide is present in SPL, which was stored or handled at multiple SWMUs within the BBP
Facility.
The ABL SLERA considered the ABL and the electrical substations as potential source areas. Based on the
findings of the HCSM Update (EHS Support, 2022), the understanding of potential source areas has been
refined for the BERA Work Plan to include the ABL, Electrical Substations, and the former Main Plant.
The potential source areas are summarized as follows.
The ABL received municipal waste from the township, native soils excavated during various
redevelopment activities, and industrial materials associated with the former Main Plant. Residual
impacts that entered the floodplain prior to finishing the ABL cover or the ABL trench collection system
upgrades pose a potential source area to the Little Mountain Creek floodplain and Little Mountain
Creek. Additionally, the upward vertical gradient within the Little Mountain Creek floodplain and erosion
of saprolite by alluvial processes make the toe of the ABL a potential source area to the Little Mountain
Creek Floodplain and Little Mountain Creek.
The refined understanding of groundwater dynamics across the BBP Facility indicates that groundwater
flows from the former Main Plant to the toward Little Mountain Creek due to the regional bedrock
orientation. Therefore, areas of the former Main Plant may be acting as potential source areas to the
ABL, the Little Mountain Creek floodplain, and Little Mountain Creek. The former Main Plant area is also
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a potential source area to Little Mountain Creek through the outfall that discharges into the Unnamed
Tributary. The Unnamed Tributary flows into Little Mountain Creek downstream of the State Highway
740 crossing.
The electrical substations also present a potential source area to the Little Mountain Creek floodplain
and Little Mountain Creek. A bushing failure at one substation resulted in the release of a tar-like
substance containing PCBs. Sampling of bushing oil indicated Aroclor 1260 concentrations of 24,000
milligrams per kilogram (mg/kg) (CEC, 2020). Approximately 150 tons of gravel and soil were removed
from spill area. Two of thirty post-cleanup verification samples identified detectable concentrations of
PCBs; however, both concentrations were significantly below the 40 Code of Federal Regulations Part
761.125 cleanup requirement. As a result, the electrical substations have the potential to represent an
active source area.
3.1.4 Fate and Transport Pathways
The fate and transport of site-related constituents released into the environment within the ABL BERA
study area depends on the physicochemical properties of the constituent and environmental media, and
the physical characteristics of the migration pathway. Constituents may partition into various exposure
media, including surface water, sediment, pore water, or soil, which determines the levels of ecological
exposure and associated ecological risks posed to aquatic and terrestrial receptors.
The primary constituent transport pathways from potential source identified areas in Section 3.1.2 to
the ecological exposure areas within the ALB BERA study area (Section 3.1.1) include groundwater
migration and discharge to surface water, overland stormwater runoff associated with precipitation
events, and direct discharges of stormwater via stormwater conveyances. Conceptual transport
pathways from site source areas to the Little Mountain Creek exposure area are illustrated in Figure 3-2;
conceptual transport pathways from site source areas to the Little Mountain Creek wetlands/drainages
and upland exposure areas are illustrated in Figure 3-3. The following sections describe the primary
transport pathways identified in the ECSM for each exposure area.
3.1.4.1 Groundwater Migration
Groundwater migration is the primary historical constituent transport pathway from the ABL and a
potential constituent transport pathway from the former Main Plant.
The HCSM (EHS Support, 2022) provides evidence that the former Main Plant may be a potential source
area for groundwater in the vicinity of the ABL. Groundwater flow to the ABL is predominately sourced
from areas north and west of the Site. Groundwater flow from the former Main Plant area generally
flows southwest toward Little Mountain Creek due to the regional bedrock orientation (northeast-
southwest). Once the groundwater flows below the ABL in the PWR layer, upward vertical infiltration
into the waste material is limited due to the low permeability saprolite layer between the PWR layer and
waste material layer. However, the saprolite layer has been eroded by fluvial processes at the toe of the
ABL, allowing for groundwater to discharge through this thin layer and into the overlying alluvium. As
discussed in Section 2.2, pronounced reductions in the electromagnetic surveys between Fall 2018 and
Fall 2022 indicate that the collection trench system is effectively capturing groundwater at the toe of the
ABL. Therefore, the groundwater migration pathway is considered to be mitigated or mitigated in part
by the remedial action. Additional information may be required to further validate the conceptual
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interaction between groundwater within the former Main Plant area and the ABL. Nevertheless,
historical landfill operations and the period prior to the interim measures resulted in groundwater
transport to the downgradient Little Mountain Creek floodplain (Figure 3-3) and potentially Little
Mountain Creek (Figure 3-2).
For the Little Mountain Creek floodplain exposure area, groundwater discharge in the form of seeps or
vertical upwelling provides a potential transport pathway to wetland soils and surface water.
Additionally, the same process would provide a potential transport pathway to jurisdictional ditches and
associated exposure media (Figure 3-3). Floodplain soil may also be influenced by groundwater
discharge through periodic inundation of the floodplain area through seasonal flooding or episodic
storm events.
For the Little Mountain Creek exposure area, groundwater discharge in the form of seeps or vertical
upwelling provides a potential transport pathway to sediment and sediment pore water. Groundwater
interactions with the floodplain soils and the floodplain drainage ditches also present a transport
pathway to surface water (Figure 3-2). Transport to the Little Mountain Creek exposure area from
potential source areas associated with the electrical substations may also have the potential to affect
groundwater through infiltration/leaching from floodplain soils.
Constituents in groundwater discharged to surface water may remain in dissolved form, adsorb to
suspended particulates, or partition to fine-grained sediments within the receiving exposure areas.
Cyanide and metal-cyanide anions, as well as dissolved metals, may adsorb to oxide minerals or clays
with high anion exchange capacities, which may influence their bioavailability and potential ecological
risks posed to ecological receptors.
3.1.4.2 Surface Water Migration
Overland stormwater runoff associated with precipitation events is another potential constituent
migration pathway from site features identified as potential source areas to ecological exposure areas.
Stormwater may transport constituents in dissolved form or adsorbed to suspended sediment or soil
particles. Dissolved forms are subject to the processes described above, while constituents adsorbed to
soil or sediment particles being transported by stormwater will eventually settle in depositional areas of
the given ecological exposure area, whether aquatic, transitional, or terrestrial.
Spills and surface runoff are the primary transport pathway from the electrical substations. Localized
topography adjacent to these features would result in overland transport towards the Eastern Drainage
Ditch and downgradient floodplain soils adjacent to Substation A and Substation B. The age of
contaminants within soils also affects the fate and transport processes described above. The likelihood
of dissolved-phase transport and bioavailability often decreases with increased time since the
contaminant entered the receiving environment.
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Figure 3-2 Preliminary Little Mountain Creek ECSM
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Figure 3-3 Preliminary Little Mountain Creek Floodplain ECSM
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3.1.5 Exposure Media and Exposure Pathways
The ABL SLERA identified the presence of site-related constituents, primarily fluoride, cyanide, and PCBs,
present in environmental media (CEC, 2021). Ecological exposure media varies among ecological
exposure areas and associated habitats, and may include surface water, sediment (including pore
water), soil, or biota. Primary ecological exposure routes associated with exposure media include direct
contact or ingestion (direct and incidental), and to a lesser extent (based on the COPECs identified),
direct contact. Inhalation is not anticipated to be a significant exposure route within the BERA Study
Area based on the constituent physiochemical characteristics. Ecological exposure pathways, including
relevant exposure media and routes, identified in the refined ECSM for the Little Mountain Creek
exposure area are illustrated in Figure 3-2; exposure pathways for the Little Mountain Creek
wetlands/drainages and upland exposure areas are illustrated in Figure 3-3. Relevant exposure routes
are described in further detail in the following sections.
3.1.5.1 Direct Contact
Direct contact is a complete exposure route for ecological receptor groups that live within or in close
contact with an exposure media. Within aquatic exposure areas, aquatic or benthic receptors, including
plants, invertebrates, fish, or amphibians, may be exposed to constituents in sediment and surface
water through direct contact via absorption through plant tissue, gills, or integument. Terrestrial
receptors (including plants and soil invertebrates) may be exposed to constituents in surficial soil
through direct contact via absorption through plant tissue or integument. Semi-aquatic and terrestrial
wildlife receptors may be exposed to constituents in surface water, sediment, or soil through direct
contact; however, this exposure pathway is considered secondary to ingestion pathways for these
receptors. Dermal contact exposure routes to birds and mammals are not considered significant
exposure routes due to the presence of fur on mammals, feathers on birds, and scales on reptiles that
mitigate direct dermal exposure (USEPA, 2005b). Direct contact exposure routes that will be
quantitatively evaluated in the BERA for the Little Mountain Creek exposure area are illustrated in
Figure 3-2; direct contact exposure routes that will be quantitatively evaluated in the BERA for the
wetlands/drainages and upland exposure areas are illustrated Figure 3-3.
3.1.5.2 Ingestion – Direct and Indirect
Ingestion of exposure media, including direct ingestion of dietary items and indirect ingestion of
sediment or soil, are the primary exposure routes of concern for semi-aquatic and terrestrial receptors.
Direct ingestion of dietary items is an important exposure route for persistent or bioaccumulative
constituents in exposure media. Persistent or bioaccumulative constituents in sediment, surface water,
or soil may be assimilated by lower trophic level species, bioaccumulated into tissues, and
bioaccumulated or biomagnified by higher trophic level species that consume lower trophic level
species.
Exposure through direct dietary ingestion varies based on the foraging behavior and range of the wildlife
receptor. Wildlife receptors with small home ranges may forage in an exposure area for their entire
lifetime, while other receptors, such as migratory wildlife or wildlife with expansive foraging ranges, may
only feed within an exposure area for a brief period before leaving to forage elsewhere. Incidental
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ingestion of exposure media, such as soil or sediment, occurs while grooming or foraging; the rate of
incidental ingestion of soil or sediment is receptor specific and highly dependent on foraging behavior.
3.1.5.3 Inhalation
Inhalation is a potentially complete, but likely insignificant exposure route for terrestrial receptors. This
exposure pathway may include the inhalation of constituents which have volatilized, or which are
adsorbed to airborne particulates. Burrowing animals may be exposed to constituents through
inhalation pathways while occupying burrows. Inhalation exposure pathways may be related to the
inhalation of VOCs in soil vapor or soil dust particles within the burrow. Burrowing animals may also be
exposed to constituents sorbed to respirable dust particles that may be inhaled while occupying
burrows. However, the inhalation of respirable dust is likely to have a minor contribution to overall risk.
Based on exposure to humans, inhalation of respirable dust particles represents a relatively insignificant
portion of the total exposure (i.e., less than 5 percent; USEPA, 2005b). However, given the shallow water
table within the Little Mountain Creek floodplain, it is unlikely that this area would be suitable for
burrowing animals. Inhalation pathways likely result in negligible contributions to overall exposure
relative to ingestion pathways; therefore, inhalation exposures will not be evaluated quantitatively in
the BERA.
3.1.6 Temporal Variability in Exposure Media
The existing dataset limits the ability to assess temporal variability in exposure media.
Solid matrices evaluated within the ABL have only been sampled during one event, therefore, no
assessment of temporal variability is possible.
Aqueous matrices have been sampled over discrete quarterly events. The analytes measured during
recurring monitoring events were typically constrained to select inorganic compounds and select metals.
Quarterly events were typically conducted in a single event year; therefore, limited inter-annual
assessment of temporal variability can be conducted with the available monitoring data. Analytes
measured more than three times in aqueous sampling stations included cyanide, available cyanide,
fluoride, arsenic, and lead. Groundwater monitoring wells in the ABL were sampled for available cyanide
and fluoride across two different quarterly sampling campaigns, which enables a preliminary assessment
of temporal variability in exposure media.
The groundwater monitoring wells in the Little Mountain Creek floodplain (ABL-MW003, ABL-MW004,
and ABL-MW005) were sampled 8 times for fluoride between August 2011 and April 2019 and 5 times
for available cyanide between November 2011 and October 2018.
A scatterplot illustrating the available cyanide concentration in floodplain monitoring wells over the
sampling events is illustrated in Figure 3-4. Monitoring wells ABL-MW003 and ABL-MW004 had a high
incidence of non-detection, with isolated detections in more recent data due to greater analytical
resolution. Observed available cyanide concentrations in ABL-MW005 decreased over time, with
concentrations of 0.016 to 0.027 mg/L available cyanide measured in 2011 to 2012 and concentrations
of 0.0025 to 0.0052 measured in 2018. The most recently measured concentration of available cyanide
was more than five times less than the greatest concentration measured in 2011.
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Figure 3-4 Groundwater Available Cyanide in Little Mountain Creek Floodplain Monitoring Wells
A scatterplot illustrating the fluoride concentration in floodplain monitoring wells over the sampling
events is illustrated in Figure 3-5. Concentrations in ABL-MW003 and ABL-MW004 were consistent over
time near or below 0.2 mg/L fluoride, with some measurements below the detection limit. ABL-MW005
showed a variable temporal pattern with the sample obtained on April 11, 2019, exhibiting the greatest
fluoride concentration. This sample occurred after a period of prolonged precipitation, with 3.65 inches
of rainfall occurring in the week leading up to the sampling event. Seven-day antecedent precipitation
amount, an indicator of overall wetness, had a weak but not statistically significant positive relationship
(p=0.19) with fluoride concentration at the ABL-MW005 station (Figure 3-6). The sampling event which
resulted in the greatest groundwater fluoride concentration at ABL-MW005 also corresponded to the
event with the greatest surface water fluoride concentrations in Little Mountain Creek. Surface water
concentrations detected were several times lower than those in groundwater and an order of
magnitude below the NCAC fluoride limit of 1.8 mg/L. It is not clear based on the distribution of data
and time period sampled whether other seasonal or temporal patterns could exist in surface water
within Little Mountain Creek and its floodplain.
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Figure 3-5 Groundwater Fluoride in Little Mountain Creek Floodplain Monitoring Wells

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Figure 3-6 Scatterplot Illustrating Relationship Between 7-Day Antecedent Precipitation Total
and ABL-MW005 Groundwater Fluoride Concentration
3.2 Refinement of Constituents of Potential Ecological Concern (Step 3a)
A fundamental step in the baseline Problem Formulation is the refinement of COPECs identified in the
SLERA to identify those COPECs that are most likely to drive risk management decision-making for the
Site. The intent of the refinement step is to focus and streamline the overall ERAGS process by
considering additional components early in the BERA process. COPEC refinement in the BERA problem
formulation is consistent with The Role of Screening Level Risk Assessments and Refining Contaminants
of Concern in Baseline Ecological Risk Assessment (USEPA, 2001a). Specific elements of COPEC
refinement include consideration of the following:
 Re-screening based on refined ESVs: Alternative ESVs that are protective of chronic exposure
but represent a broader range of no observed effect concentration (NOEC) endpoints are
considered to provide context for the potential ecological risk associated with COPECs identified
in the SLERA and to focus the evaluation of COPECs in the BERA.
 Updated screening based on revised terrestrial, transitional, and aquatic exposure areas:
COPECs retained in the SLERA were identified on a per matrix basis across the SLERA study area.
The COPEC refinement process was carried out within the revised exposure areas to better
resolve conditions present moving into the BERA.
The COPEC refinement process presented herein addresses key comments raised by NCDEQ regarding
the ABL SLERA.
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A preliminary refinement of COPECs identified in the ABL SLERA (CEC, 2021) was conducted based a
reconstructed SLERA dataset. An email invitation from NCDEQ to BBP regarding participation in a
training for the submittal of electronic data deliverables (EDDs) to the NCDEQ Waste Management
Division Environmental Quality Information Systems (EQuIS) database was received. During a follow-up
meeting on September 23, 2021 NCDEQ requested that all investigation data for the BBP Facility be
collated and transmitted in an EQuIS database compatible format. Therefore, the COPEC refinement
approach collated available EDDs that contributed to the analyses in the ABL SLERA to retain necessary
data fields to be uploaded to EQuIS. This process was carried out programmatically using R statistical
software to reduce the potential for transcription errors. Sample data groups (SDGs) in PDF format that
were not able to be integrated directly from EDDs, were converted to a suitable tabular file format,
aligned, and integrated into the database. Exposure areas were spatially assigned to data points to
enable refined screening. This process also clarified the type of quantitation limit, when available, to
more clearly resolve the analytical limits and data quality associated with exposure estimates.
Appendix A provides a cross-tabulated record of the screened database compiled by matrix.
Additional COPEC refinement will be conducted in the BERA problem formulation based on the
combined datasets from the ABL SLERA and the supplemental BERA investigation outlined in Section 4
for ecological exposure media. The combined datasets will be refined based on the elements identified
above, as well as additional considerations for COPEC refinement provided in USEPA (2001a).
3.2.1 Refined COPEC Screening Process
The refined COPEC screening process was comprised of the following steps:
1) Identification and collation of a suitable hierarchy of ESVs by exposure medium
2) Refinement of ESVs based on available knowledge of site-specific conditions (e.g., hardness and
total organic carbon corrections)
3) Expansion/clarification of datasets included in evaluation based on available information
4) Organization of exposure data by medium and exposure area
5) Calculation of summed fields for constituent groups evaluated based on total concentrations
(e.g., total PCBs, total PAHs)
6) Screening of exposure data for each exposure area and exposure medium.
The ESV hierarchy identified for the refined COPEC screening process are listed as follows by matrix.
Surface Water ESVs are provided in Table 2. Surface water screening levels were compiled from the
North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4
Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e. Criteria selection logic
was as follows:
• 15A NCAC 02B Water Quality Standards for Surface Water – Freshwater Class C Waters. If
chronic and acute values were derived for a given analyte, the chronic value was selected.
• NCDEQ In-Stream Target Values for Surface Water were adopted if no NC 02B Water Quality
Standards existed.
• USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a
freshwater water quality standard or freshwater in-stream target value. PAHs screening levels
were selected from Table 1e of the USEPA Region 4 guidance.
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Sediment ESVs are provided in Table 3. Sediment screening levels adopted were compiled from the
USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
The criteria selection logic was as follows:
• Freshwater revised screening values were selected as the screening level, where available.
• The freshwater ESV was selected for compounds without freshwater revised screening values.
• PAH screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Soil ESVs are provided in Table 4. Soil screening levels were compiled from the USEPA Region 4
Ecological Risk Assessment Supplemental Guidance Table 3: Region 4 Soil Screening Values for
Hazardous Waste Sites.
The same ESV hierarchy for surface water was adopted for groundwater in stations within the floodplain
of Little Mountain Creek for the BERA Work Plan COPEC refinement. Although it is recognized that this
groundwater screening is extremely conservative due to attenuation processes that occur between the
floodplain and Little Mountain Creek, this comparison is useful to eliminate potential landfill-related
constituents in groundwater as surface water COPECs via groundwater discharge pathways if
groundwater concentrations are below surface water criteria. However, groundwater concentrations
that exceed surface water criteria do not necessarily indicate surface water COPECs due to the potential
attenuation of these concentrations prior to discharge to Little Mountain Creek. Final decision-making
on risk in the BERA will rely on the in-stream surface water and pore water concentrations.
Refinement of ESVs based on Site-specific conditions was carried out for aqueous and solid matrices.
Aqueous ESVs were normalized for hardness where applicable using the 15A NCAC 02B conversion
formulas. Little Mountain Creek screening levels were normalized using the geometric mean of hardness
in samples collected in 2020 (48 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized
using geometric mean of hardness in samples collected in 2020 (97 mg/L CaCO3). Hardness conditions
observed within the Eastern Drainage Ditch were applied to the other transitional aquatic features
within the Little Mountain Creek floodplain and to groundwater. The cyanide ESV adopted the ruling
from the 2020-2022 North Carolina Triennial Review whereby the 5 micrograms per liter (µg/L) standard
applies to both total and available cyanide. The cyanide screening comparison is conservative because
available cyanide represents both free cyanide (unionized HCN and CN-) and metal-cyanide complexes
that are dissociated into free cyanide under mildly acidic conditions. The free cyanide fraction is
responsible for adverse effects to aquatic biota; therefore, the measures of available cyanide can
overestimate exposure in circumneutral waters, like Little Mountain Creek.
The North Carolina 15A NCAC 02B Water Quality Standard for fluoride in freshwater is 1.8 mg/L. The
fluoride criterion does not align with the current state of the science of fluoride aquatic ecotoxicity. The
basis for the 1.8 mg/L water quality standard for fluoride is summarized as follows. The fluoride criterion
was adopted in 1979 and was derived by taking one-twentieth of the 96-h lethal concentration in 50
percent of test organisms (LC50) for rainbow trout, 36.1 mg/L sourced from a 1977 USEPA Report. This
freshwater limit does not take into account toxicity modifying factors (TMFs; i.e., hardness, alkalinity,
chloride) that are known to affect the aquatic ecotoxicity of fluoride. The criterion was developed using
a single acute duration toxicity test that lacked adequate documentation on its suitability. The resulting
acute, lethal test result and application of an assessment factor approach is inherently conservative.
Further review and assessment of a recent meta-analysis conducted by Parker et al. (2021) on fluoride
aquatic ecotoxicity is summarized in Section 3.3.1.2.
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Sediment ESVs were normalized for organic carbon (OC) where applicable. A value of 0.5% was assumed
for OC normalization throughout the Site. Gravel bottom streams in the Piedmont region typically do
not have appreciable amounts of sediment organic carbon at concentrations above one percent.
Therefore, the use of 0.5% OC adds a level of conservatism to the sediment screening process against
the USEPA Region 4 revised screening values. Quantifying the range of organic carbon content within
Little Mountain Creek and the adjacent floodplain in the supplemental BERA investigations will be used
to further refine ESVs in the BERA.
The ABL SLERA dataset provided in Table 1 and illustrated in Figure 2-6 and Figure 2-7 was reviewed in
alignment with the defined exposure areas provided in Figure 3-1. Focusing the available analytical data
to the identified exposure areas had the following outcome on the BERA Work Plan dataset: 1) it added
soil sampling locations associated with the Adjacent Substation A and Adjacent Substation B exposure
areas and 2) constrained the groundwater evaluation to monitoring wells of most biological relevance
within the Little Mountain Creek floodplain. Figure 3-7 and Figure 3-8 illustrate the stations considered
in the BERA Work Plan COPEC refinement for aqueous and solid matrices, respectively. A table
summarizing the samples and analyses considered in the BERA Work Plan screening by matrix and
exposure area is provided in Table 5. Some data included in the BERA Work Plan screening pre-dates the
corrective actions implemented within the Site described in Section 2.2. As part of the BERA execution,
new data will be evaluated against historical data and refinement to the dataset included in exposure
characterization may be warranted based on trend analyses or other changes induced by landfill
corrective actions over time.
Summed analytes were calculated by sample, exposure area and matrix for select analyte groups.
Summed analytes included: total PCBs – Aroclors, total PCBs – congeners, total low molecular weight
PAHs (LMW PAHs), and total high molecular weight PAHs (HMW PAHs). Calculations were performed
with non-detected values substituted with zero, the quantitation limit, and an imputed value at one-half
the quantitation limit. The lowest detection or reporting limit for each sample was used as the
quantitation limit since some historical datasets did not specify whether the reporting limit (RL) or MDL
were provided.
The resulting database was screened as per NCDEQ (2003) with the following information summarized
by exposure area and matrix:
• Frequency of detection.
• Maximum detected concentration.
• Minimum detected concentration.
• Location of maximum concentration.
• Sample quantitation limit ranges.
The refined COPEC screening process was conducted to preliminarily identify focal COPECs that may
influence the BERA. The refined COPEC screening process is not intended to remove COPECs from
further consideration in the supplemental BERA investigations. Rather, the COPEC refinement is
intended to identify and provide context for those constituents that are likely to be focal COPECs in the
BERA process. Additional COPEC re-screening will be conducted in the BERA Problem Formulation based
on the combined datasets from the ABL SLERA and the supplemental BERA investigations for ecological
exposure media. As described in Section 4.2.2, proposed supplemental BERA investigation sampling will
include the collection of background datasets that will be incorporated into the BERA COPEC refinement
process and enable further COPEC refinement by comparison to background values. Additionally, the
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expansion of sample coverage area and total sample counts will enable further COPEC refinement using
the frequency and magnitude of detection for exposure areas that have a limited number of samples for
a given analyte.
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Figure 3-7 Aqueous Phase Stations Considered in the BERA Work Plan COPEC Refinement
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Figure 3-8 Solid Phase Stations Considered in the BERA Work Plan COPEC Refinement
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A summary of the findings of the refined screening process by exposure area is provided in Sections
3.2.1.1 through 3.2.1.4.
3.2.1.1 Little Mountain Creek
3.2.1.1.1 Surface Water
Category 1/Category 5 surface water COPECs within the Little Mountain Creek exposure area include:
lead, total PCB – congeners, and select PAHs (benzo[a]anthracene, benzo[a]pyrene,
benzo[b]fluoranthene, benzo[k]fluoranthene, and chrysene).
In the Little Mountain Creek exposure area fluoride was detected in 19 of 31 surface water samples with
detected concentrations ranging from 0.04 to 0.17 mg/L (Table 6). Concentrations were typically one
order of magnitude below the conservative ESV of 1.8 mg/L. The hazard quotient based on the
maximum exposure point concentration (HQMAX) for fluoride in the Little Mountain Creek exposure area
was <1.0. Cyanide was detected in 3 of 31 samples with detected concentrations ranging from 0.004 to
0.005 mg/L. The HQMAX for cyanide was <1.0. Available cyanide was not detected across five surface
water samples in the Little Mountain Creek exposure area. Lead was detected in 1 of 23 samples and
was the only metal detected at a concentration exceeding its corresponding surface water refined ESV
(Table 6). The maximum detected concentration for lead in the Little Mountain Creek exposure area was
0.003 mg/L and the associated HQMAX was 2.3.
Five surface water samples were analyzed for PAHs in the Little Mountain Creek exposure area.
Individual PAHs were detected at one sampling station, ABL-SW008. Detected PAH concentrations
exceeding refined ESVs were present for benzo[a]anthracene, benzo[a]pyrene, benzo[b]fluoranthene,
benzo[k]fluoranthene, and chrysene (Table 6). Hazard quotients for detected PAH exceedances in the
Little Mountain Creek exposure area ranged from 2.2 to 3.0. PCB Aroclors were not detected across
eight samples in the Little Mountain Creek exposure area. Total PCB congeners were detected in one of
five samples with a concentration 30.1 ng/L (Table 6). The HQMAX associated with this sample was 30.1
at station ABL-SW008. Station ABL-SW008, located downgradient of State Highway 740 had the highest
incidence of constituent detections and COPECs. PCB congeners were detected at this station during the
July 12, 2018 sampling event but were not detected during the April 10, 2019 sampling event. Each of
these samples were collected following significant rainfall at the Albemarle Airport in the week
preceding the sampling event. 7-day cumulative rainfall preceding the July 12, 2018 sample totaled 2.25
inches while 7-day cumulative rainfall preceding the April 10, 2019 sample totaled 3.65 inches, including
2.1 inches occurring the day before sample collection. The likelihood of entraining suspended sediments
in surface water samples is increased following significant rainfall and may explain PCB congener
detections observed in the July 12, 2018 sample at station SW008. PCB congener number 105 and 118
were the only dioxin-like congeners detected in Little Mountain Creek surface water (Appendix B).
Congener profiles appear to be weathered PCBs; however, the limited detection frequency and low
concentrations observed constrain the ability to ascertain PCB congener profiles. There were no
detected concentrations exceeding surface water refined ESVs for other SVOCs, VOCs, or pesticides
(Table 6). A comprehensive summary of screened surface water results for Little Mountain Creek is
provided in Appendix C, Table C-1.
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3.2.1.1.2 Sediment
No Category 1 surficial sediment COPECs were identified within the Little Mountain Creek exposure
area.
In sediments of the Little Mountain Creek exposure area, fluoride, cyanide, and metals were analyzed in
two samples. Fluoride was not detected in either sample, while detected cyanide concentrations were
0.17 and 0.54 mg/kg (Table 7). Detected metals concentrations were lower than corresponding refined
ESVs for each metal analyzed in each sediment sample. PAHs were analyzed in three sediment samples
from the Little Mountain Creek exposure area. There were no PAH detections across these three
samples. PCB Aroclors and PCB congeners were analyzed in three and one sediment samples,
respectively. PCB Aroclors were not detected across the three sediment samples from the Little
Mountain Creek exposure area. There were 30 individual PCB congener detections in the single sample
analyzed for congeners with concentrations ranging from 25.7 to 886 ng/kg (Table 7). Total detected
PCB congeners in this sample had a concentration of 5,622 ng/kg and an associated HQMAX of <1.0 (Table
7). Detected dioxin-like congeners in this sample include congener number 77, 105, and 118 (Appendix
B). Other SVOCs and VOCs were analyzed in two sediment samples within the Little Mountain Creek
exposure area. No detections were present for SVOCs or VOCs in sediment in the Little Mountain Creek
exposure area (Table 7). A comprehensive summary of screened sediment results for Little Mountain
Creek is provided in Appendix C, Table C-2.
Upgradient Little Mountain Creek
In the Upgradient Little Mountain Creek exposure area, fluoride was detected in three of eight surface
water samples with detected concentrations ranging from 0.061 to 0.082 mg/L. The HQMAX for fluoride
in the Upgradient Little Mountain Creek exposure area was <1.0. Cyanide was not detected across nine
samples and available cyanide was not detected across one sample. No metals were detected at
concentrations exceeding refined ESVs in surface water in the Upgradient Little Mountain Creek
exposure area.
Two samples were analyzed for PAHs in surfaces waters of the Upgradient Little Mountain Creek
exposure area. Naphthalene was detected at location ABL-SW012, which was the only PAH detection in
surface water within this exposure area. The HQMAX associated with this detection was <1.0 (Table 8).
Three samples were analyzed for PCB Aroclors in the Upgradient Little Mountain Creek exposure area.
PCB Aroclors were not detected across three surface water samples within this exposure area. PCB
congeners were analyzed in one sample from the Upgradient Little Mountain Creek exposure area. No
PCB congener detections were present in this sample (Appendix B). There were no detected
concentrations exceeding surface water refined ESVs for other SVOCs, VOCs, or pesticides (Table 8). A
comprehensive summary of screened surface water results for Upgradient Little Mountain Creek is
provided in Appendix C, Table C-3.
In sediments of the Upgradient Little Mountain Creek exposure area, fluoride, cyanide, and metals were
analyzed in one sample. Fluoride was not detected while cyanide was detected at a concentration of
0.13 mg/kg (Table 9). Barium was the only metal detected at a concentration exceeding its
corresponding refined ESV, with a concentration of 89.3 mg/kg and an associated HQMAX of 1.49. PAHs
were analyzed in two sediment samples from the Upgradient Little Mountain Creek exposure area.
There were no PAH detections in either sediment sample from this exposure area. PCB Aroclors and PCB
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congeners were analyzed in two and one sediment samples, respectively. There were no PCB Aroclor
detections or PCB congener detections in these samples (Table 9; Appendix B). Other SVOCs and VOCs
were analyzed in one sediment sample from the Upgradient Little Mountain Creek exposure area. There
were no SVOC or VOC detections present in sediment within this exposure area. A comprehensive
summary of screened sediment results for Upgradient Little Mountain Creek is provided in Appendix C,
Table C-4.
3.2.1.2 Floodplain Wetlands/Drainages
3.2.1.2.1 Eastern Drainage Ditch
In the Eastern Drainage Ditch exposure area, fluoride was detected in 11 of 11 surface water samples
with detected concentrations ranging from 0.52 to 23.8 mg/L (Table 10). There were 6 exceedances of
the fluoride refined ESV with a HQMAX of 13.2. Cyanide was detected in 13 of 13 surface water samples
with detected concentrations ranging from 0.014 to 0.078 mg/L. There were 13 exceedances of the
cyanide refined ESV with a HQMAX of 15.6. Available cyanide was detected in 5 of 6 surface water
samples with detected concentrations ranging from 0.0008 to 0.0086 mg/L. There were 2 exceedances
of the refined ESV for available cyanide with a HQMAX of 1.7. Metals were analyzed in two surface water
samples collected from the Eastern Drainage Ditch exposure area. Lead was the only metal with a
detected concentration exceeding its corresponding refined ESV. Lead was detected in one of two
surface water samples with a concentration of 0.004 mg/L and a HQMAX of 1.52.
Five surface water samples were analyzed for PAHs in the Eastern Drainage Ditch exposure area. There
were no PAH detections across these five samples. PCB Aroclors and PCB congeners were analyzed in
five and three surface water samples, respectively. PCB Aroclors were not detected across five surface
water samples, however, there were 30 detections of individual PCB congeners across three surface
water samples Table 10). Detected concentrations of individual PCB congeners ranged from 0.53 to 2.3
ng/L in the Eastern Drainage Ditch exposure area. Detected dioxin-like congeners in these samples
included congener number 105 and 118 (Appendix B). Total detected PCB congeners were detected in 3
locations with concentrations ranging from 2.2 to 15.2 ng/L (Table 10). The HQMAX was 15.2 at location
ABL-SW013. Other SVOCs and VOCs were analyzed in two surface water samples collected from the
Eastern Drainage Ditch exposure area. There was a single VOC detection for acetone at location ABL-
ML003 with an associated HQMAX <1.0 (Table 10). A comprehensive summary of screened surface water
results for the Eastern Drainage Ditch is provided in Appendix C, Table C-5.
Fluoride, cyanide, and metals were each analyzed in one sediment sample from the Eastern Drainage
Ditch (Table 11). Fluoride was not detected while cyanide was detected at a concentration of 1.4 mg/kg.
Barium was the only metal with a detected concentration exceeding its corresponding sediment refined
ESV. Barium was detected at a concentration of 85.8 mg/kg with an associated HQMAX of 1.43. Four
sediment samples were analyzed for PAHs in the Eastern Drainage Ditch exposure area. Total detected
low molecular weight PAH concentrations ranged from 0.041 to 1.018 mg/kg while total detected high
molecular weight PAH concentrations ranged from 0.115 to 3.203 mg/kg. The HQMAX for individual
detected PAHs was <1.0. PCB Aroclors and PCB congeners were analyzed in four and three sediment
samples, respectively. PCB Aroclors were not detected across four sediment samples, however, there
were 164 detections of individual PCB congeners across three sediment samples with concentrations
ranging from 33 to119,000 ng/kg (Table 11). Total detected PCB congener concentrations in these
samples ranged from 579 to 823,510 ng/kg (Table 11). The HQMAX was 1.2 at location ABL-SD011.
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Detected dioxin-like congeners in these samples included congener numbers 77, 105, 118, 167, and 189
(Appendix B). Other SVOCs and VOCs were analyzed in one sediment sample from the Eastern Drainage
Ditch exposure area. No VOCs or SVOCs were detected at concentrations exceeding refined ESVs. A
comprehensive summary of screened sediment results for the Eastern Drainage Ditch is provided in
Appendix C, Table C-6.
3.2.1.2.2 WB Wetland/SB Ditch
In the WB Wetland/SB Ditch exposure area, fluoride, cyanide, and metals were analyzed in one surface
water sample. Fluoride and cyanide were both not detected and there were no detected metals
concentrations exceeding refined ESVs (Table 12). PAHs and PCB Aroclors were each analyzed in one
surface water sample. No PAH or PCB Aroclor detections were present in surface water. Other SVOCs
and VOCs were analyzed in one surface water sample in the WB Wetland/SB Ditch exposure area. No
SVOC or VOC detections were present in surface water in this exposure area. A comprehensive summary
of screened surface water results for the WB Wetland/SB Ditch is provided in Appendix C, Table C-7.
In sediment, fluoride, cyanide, and metals were analyzed in one sample from the WB Wetland/SB Ditch
exposure area. Fluoride was not detected while cyanide was detected at a concentration of 0.42 mg/kg
(Table 13). There were no detected metals concentrations exceeding corresponding sediment refined
ESVs. PAHs and PCB Aroclors were each analyzed in one sediment sample. No PAH or PCB Aroclor
detections were present in sediment. Other SVOCs and VOCs were analyzed in one sediment sample in
the WB Wetland/SB Ditch exposure area. No SVOC or VOC detections were present in sediment in this
exposure area. A comprehensive summary of screened sediment results for the WB Wetland/SB Ditch is
provided in Appendix C, Table C-8.
3.2.1.2.3 WC Wetland/WC Ditch
In the WC Wetland/WC Ditch exposure area, fluoride and metals were analyzed in one surface water
sample. Fluoride was detected at a concentration of 28.9 mg/L (Table 14). The HQMAX associated with
this result was 16.1. No metals were detected at concentrations exceeding their corresponding refined
ESVs. PAHs and PCB Aroclors were each analyzed in one surface water sample. No PAH or PCB Aroclor
detections were present in surface water. Other SVOCs and VOCs were analyzed in one surface water
sample in the WC Wetland/WC Ditch exposure area. No VOC detections were present in surface water
in this exposure area. Bis(2-Ethylhexyl) Phthalate was the SVOC detected in surface water, with a
concentration of 0.014 mg/L and an associated HQMAX of 2.8 (Table 14). A comprehensive summary of
screened surface water results for the WC Wetland/WC Ditch is provided in Appendix C, Table C-9.
In sediment, fluoride, cyanide, and metals were analyzed in one sample from the WC Wetland/WC Ditch
exposure area. Fluoride was detected at a concentration of 144 mg/kg while cyanide was detected at a
concentration of 0.43 mg/kg (Table 15). Barium was the only metal with a detected concentration
exceeding its corresponding sediment refined ESV. Barium was detected at a concentration of 187
mg/kg with an associated HQMAX of 3.1. PAHs and PCB Aroclors were each analyzed in one sediment
sample. Individual PAHs were detected in sediment, however there were no detected PAH
concentrations that exceeded refined ESVs. The total detected low molecular weight PAH concentration
was 0.299 mg/kg and the total detected high molecular weight PAH concentration was 0.936 mg/kg. No
PCB Aroclor detections were present in sediment. Other SVOCs and VOCs were analyzed in one
sediment sample in the WC Wetland/WC Ditch exposure area. One SVOC (benzoic acid) and one VOC
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(methylene chloride) were detected, however neither detected concentration exceeded its
corresponding refined ESV (Table 15). A comprehensive summary of screened sediment results for the
WC Wetland/WC Ditch is provided in Appendix C, Table C-10.
3.2.1.2.4 WY Wetland/SB Ditch
In the WY Wetland/SB Ditch exposure area, fluoride and metals were analyzed in one surface water
sample. Fluoride was detected at a concentration of 0.31 mg/L (Table 16). The HQMAX associated with
this result was <1.0. No metals were detected at concentrations exceeding their corresponding refined
ESVs. PAHs and PCB Aroclors were each analyzed in one surface water sample. No PAH or PCB Aroclor
detections were present in surface water. Other SVOCs and VOCs were analyzed in one surface water
sample in the WY Wetland/SB Ditch exposure area. No SVOC or VOC detections were present in surface
water in this exposure area. No sediment data was available for the WY Wetlands/SB Ditch exposure
area. A comprehensive summary of screened surface water results for the WY Wetland/SB Ditch is
provided in Appendix C, Table C-11.
3.2.1.3 Floodplain Uplands
Soil data were available from the Eastern Drainage Ditch, Substation A, and Substation B exposure areas.
Screened results are summarized, by exposure area, below.
3.2.1.3.1 Floodplain Upland Forest
Ten soil samples were analyzed for PCB Aroclors and PAHs in the Floodplain Upland Forest exposure
area, adjacent to the Eastern Drainage Ditch (Table 17). For PCB Aroclors, one sample had a detection
(ABL-SB005), while nine samples did not detect PCB Aroclors. The detected sample exceeded the refined
ESV for total PCB Aroclors. The detected total PCB Aroclor concentration was 0.056 mg/kg, and the
associated HQMAX was 1.9. All ten samples had detected high molecular weight PAHs, with
concentrations ranging from 0.017 mg/kg to 7.872 mg/kg. Three samples exceeded the refined ESV for
high molecular weight PAHs; the HQMAX was 7.2 in the sample from ABL-SB005. Nine of the ten samples
had detected low molecular weight PAHs, with concentrations ranging from 0.025 to 3.220 mg/kg. No
samples exceeded the refined ESV for low molecular weight PAHs; the HQMAX was <1.0 in the sample
from ABL-SB005. A comprehensive summary of screened soil results for the Floodplain Upland Forest is
provided in Appendix C, Table C-12.
3.2.1.3.2 Substation A
Five soil samples were analyzed for PCB Aroclors and PAHs in the Substation A exposure area (Table 18).
There were no detections of PCB Aroclors. All five samples had detected high molecular weight PAHs,
with concentrations ranging from 0.252 mg/kg to 2.229 mg/kg. One sample exceeded the refined ESV
for high molecular weight PAHs; the HQMAX was 2.0 in the sample from ABL-SB011. All five samples had
detected low molecular weight PAHs, with concentrations ranging from 0.066 mg/kg to 0.784 mg/kg. No
samples exceeded refined ESVs for low molecular weight PAHs; the HQMAX was <1.0 in the sample from
ABL-SB011. A comprehensive summary of screened soil results for Substation A is provided in Appendix
C, Table C-13.
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3.2.1.3.3 Substation B
Five soil samples were analyzed for PCB Aroclors and PAHs in the Substation B exposure area (Table 19).
PCB Aroclors were detected in one sample (ABL-SB017), with a concentration of 0.205 mg/kg. This
sample exceeded the refined ESV for PCB Aroclors; the HQMAX was 4.99. All five samples had detected
high molecular weight PAHs, with concentrations ranging from 0.463 mg/kg to 45.96 mg/kg. Three
samples exceeded the refined ESV for high molecular weight PAHs; the HQMAX was 41.8 in the sample
from ABL-SB017. All five samples had detected low molecular weight PAHs, with concentrations ranging
from 0.115 mg/kg to 9.10 mg/kg. No samples exceeded the refined ESV for low molecular weight PAHs;
the HQMAX was <1.0 in the sample from ABL-SB017. A comprehensive summary of screened soil results
for Substation B is provided in Appendix C, Table C-14.
3.2.1.4 Groundwater
3.2.1.4.1 Floodplain
In the Floodplain exposure area, fluoride was detected in 18 of 24 groundwater samples at
concentrations ranging from 0.054 to 0.76 mg/L (Table 20). The HQMAX for fluoride was <1.0. Cyanide
was detected in 8 of 12 groundwater samples at concentrations ranging from 0.005 to 0.11 mg/L. There
were seven exceedances of the refined ESV for cyanide with a HQMAX of 22. Available cyanide was
detected in 8 of 15 groundwater samples at concentrations ranging from 0.0003 to 0.027 mg/L. There
were four exceedances of the available cyanide refined ESV with a HQMAX of 5.4. Metals were analyzed in
one groundwater sample from the Floodplain exposure area. The cobalt concentration in this sample
was 0.072 mg/L, which exceeded the corresponding refined ESV and had an associated HQMAX of 45.
(Table 20). No other detected metals exceeded refined ESVs in groundwater in the Floodplain exposure
area. A comprehensive summary of screened ground water results is provided in Appendix C, Table C-
15.
PAHs, other SVOCs, and VOCs were each analyzed in one groundwater sample from the Floodplain
exposure area. PAHs and other SVOCs were not detected in groundwater within this exposure area.
Chloroform was the only detected VOC in groundwater, with a concentration of 0.00018 mg/L and an
associated HQMAX <1.0 (Table 20).
3.2.1.4.2 Wet Well
The Wet Well is not an exposure area assessed as part of the BERA Work Plan; however, given the water
here represents what is being captured by the trench collection infrastructure, data from the Wet Well
was considered as a time and space integrated measure of worst-case scenario of landfill conditions. In
the Wet Well locations, fluoride was detected in four of four samples with concentrations ranging from
12 to 26 mg/L (Table 21). A comprehensive summary of screened surface water results is provided in
Appendix C, Table C-16.
Additional ecotoxicological and chemical data were collected for samples from the Wet Well in 2022
(Appendix D). Fluoride concentrations during testing were 20 to 22 mg/L, within the range of the
dataset considered here. Ecotoxicological testing was conducted on Ceriodaphnia dubia in accordance
with the North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure, Version 3.0 (NCDENR,
2010). The concentration at which there was a 25 percent reduction in the number of young produced
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per adult ranged from 44.8 percent to 53.8 percent depending on the source of dilution water,
indicating no chronic risk when leachate from the Wet Well was diluted approximately one-to-one. Full
chemical and ecotoxicological results for the Wet Well are reported in Appendix D.
3.2.2 Summary of Refined COPECs by BERA Exposure Area
A summary of the refined COPECs is provided below in Table 3-5. Results of the refined screening
evaluations are summarized by exposure area for surface water, sediment, soil, and groundwater in
Table 6 through Table 21. COPECs were identified based on the presence of at least one detected
concentration exceeding the corresponding refined ESV in at least one exposure area. COPECs identified
as part of the refined screening evaluation are presented, by matrix, below. Bolded constituent names
indicate that the mean concentration, with non-detects substituted at the limit of detection, also
exceeded the corresponding refined ESV in at least one exposure area.
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Table 3-5 Summary of Category 1 and Category 5 COPECs by Exposure Area and Matrix
Category 1/Category 5
COPECs Floodplain Forest Substation A Substation B Little Mountain Creek Little Mountain Creek Upgradient Eastern Drainage Ditch WC Wetland/WC Ditch WB Wetland/SB Ditch WY Wetland/SB Ditch Groundwater - Floodplain Wet Well Exposure Medium: SO SO SO SED SW SED SW SED SW SED SW SED SW SW GW GW
Inorganics
Cyanide  
Cyanide, Available  
Fluoride   
Metals
Barium   
Cobalt 
Lead  
Polycyclic Aromatic Hydrocarbons (PAHs)
Benzo[a]anthracene 
Benzo[a]pyrene 
Benzo[b]fluoranthene 
Benzo[k]fluoranthene 
Chrysene 
Total LMW
Total HMW   
Other Semi-Volatile Organic Compounds (SVOCs)
Bis(2-Ethylhexyl) Phthalate 
Polychlorinated biphenyls (PCBs)
Total PCBs (Aroclors)  
Total PCBs (Congeners)   
Notes:
Grey cells indicate no data; Black dots indicate COPECs.
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3.2.3 Step 3a Scientific Management Decision Point
Refinement of COPECs identified in the SLERA, as well as an assessment of the adequacy of existing
datasets to characterize exposure and assess ecological risk within the identified exposure areas,
indicates that the available information is not adequate to conclude that ecological risks are negligible
within the study area. Therefore, it is recommended that the BERA proceed to Step 3b to plan and scope
additional data collection to provide datasets to adequately characterize exposure and assess risks for
ecological receptors and exposure pathways identified in the refined ECSM (Section 3.1). Scoping and
planning of the BERA will focus on characterizing exposure to Category 1/5 COPECs identified in the Step
3a refinement and addressing uncertainties associated with exposure to COPECs in Categories 2 through
4.
3.3 Planning and Scoping of the BERA (Step 3b)
Step 3b of the BERA Problem Formulation includes the compilation of information to define the
assessment endpoints, risk questions, and measurement endpoints that provide the framework for the
BERA study design and risk analysis plan. A review of the environmental fate and ecotoxicity of Category
1/5 COPECs is presented to support the refined ECSM presented in Section 3.1.
3.3.1 Fate and Ecotoxicity of Primary Constituents of Potential Concern
The results of the ABL SLERA and refined BERA Work Plan COPEC screening indicated that cyanide,
fluoride, PCBs, and PAHs are the primary COPECs identified within the potential source areas and site
features. Select metals were also detected at low frequencies in site media at maximum concentrations
exceeding conservative ESVs. The following sections present a preliminary review of the ecotoxicity of
these constituent groups pertaining to exposure in aquatic, transitional, and terrestrial environments.
3.3.1.1 Cyanide
Cyanide is a general term that is used to refer to many compounds that contain a carbon-nitrogen
functional group where the two atoms are bound together with a triple bond. Cyanide occurs in multiple
forms in the environment. In water, cyanide can occur in strong and weak metal-cyanide complexes, as
cyanate or thiocyanate, organocyanides, or as available cyanide. In solid phases, cyanides can occur in
simple metal cyanide solids, complexes with alkali earth metals, or in complexes with other metals
(Jaszczak et al., 2017). The toxicity of cyanide depends on its form. Available cyanide, including the
liberated anion of cyanide (CN-) as well as hydrogen cyanide (HCN), and soluble cyanide salts are most
acutely toxic.
During the aluminum reduction process many chemical reactions can take place within the pot, which
consists of the refractory lining, carbon cathode, and carbon sidewalls. Some of the chemical reactions
that take place within pot lining materials are responsible for the production of cyanide compounds.
Cyanide, along with other potentially hazardous compounds, such as fluorides, can accumulate within
the potliner during its operational lifespan. The presence of sodium-cyanide (NaCN) in SPL is of greatest
concern because it is a soluble cyanide salt. Other less-soluble cyanide compounds, such as sodium
ferrocyanide, are also present in large quantities within SPL (Courbariaux et al., 2004).
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The primary mode of toxicity of cyanide compounds is disruption of cellular respiration. More
specifically, cyanide causes histotoxic hypoxia, or the inability for cells to take up oxygen. The
mechanism that causes disruption to cellular respiration is available cyanide binding with the trivalent
iron within cytochrome oxidase, an essential enzyme in the electron transport chain. Once bound, the
synthesis of adenosine triphosphate (ATP) ceases and cellular function ceases due to the lack of energy
(Jaszczak et al., 2017). Cyanide ions can also affect other enzymatic paths in flora and fauna (Ebbs,
2004), and react with hemoglobin (Lanno and Menzie, 2006). The ecotoxicity of cyanide is discussed for
aquatic and terrestrial receptors below.
Cyanide exposure in aquatic environments occurs through direct contact with cyanide-containing water.
This exposure occurs through ingestion or rapid gill uptake by aquatic organisms. Semi-aquatic
organisms can also be exposed through drinking cyanide-containing water. In some cases, exposure to
less soluble forms of cyanide in water can affect mammalian and avian receptors. This would occur as a
result of available cyanide being liberated in the stomach due to the acidic and anoxic conditions.
Incidental ingestion of cyanides in sediment is not a significant exposure pathway because available
cyanide and weak metal–cyanide complexes tend to not accumulate in sediments unless organic carbon
is abundant (Higgins and Dzombak, 2006). Cyanide does not tend to persist in aquatic environments
because rapid chemical disassociation or biogeochemical metabolism occurs within the water column.
The reactive nature of cyanide in water and its acute toxicity to (and rapid metabolism within) organisms
limits the potential for bioaccumulation (Eisler, 1991; Lanno and Menzie, 2006). Species mean acute
toxicity values for 28 freshwater species ranged from 0.046 to 10 mg CN/L (Lanno and Menzie, 2006).
Chronic data are much more sparsely available for cyanide, and chronic toxicity values ranged between
0.008 and 0.079 mg CN/L for five freshwater and two marine species (Lanno and Menzie, 2006).
In terrestrial environments, available cyanide is typically not present. Upon entering the soil matrix via
groundwater or deposition, available cyanide is rapidly complexed with metals to form cyanide-metal
complexes, metabolized through microbial processes, or volatilized (Lanno and Menzie, 2006). Because
cyanide compounds do not typically bioaccumulate, direct contact exposure and incidental ingestion of
soils containing cyanides are the primary exposure routes for cyanides in terrestrial organisms. The
mode of toxicity of cyanide to terrestrial plants is similar to that of fauna. Enzymatic binding to
cytochrome oxidase results in cessation of cellular electron transport (Yu, 2015). Some plant species can
assimilate or metabolize cyanide, and phytoremediation techniques as a means to cleanup terrestrial
cyanide have been extensively studied (Yu, 2015).
The literature regarding cyanide bioavailability and toxicity summarized in this section will be used to
support the development of ecological benchmark concentrations for relevant exposure media in the
BERA Report. The derivation of ecological benchmark concentrations will consider the site-specific
conditions in terrestrial, transitional, and aquatic exposure areas that may influence cyanide
bioavailability and toxicity to representative ecological receptors.
3.3.1.2 Fluoride
Fluoride is naturally abundant in soils and contained in minerals apatite (Ca5(PO4)3F), fluorite (CaF2),
cryolite (Na3AlF6) and micaceous clay materials. Potassium fluoride (KF) and sodium fluoride (NaF) are
soluble salts that contain fluoride. The fluoride containing feedstocks used in smelting include fluorite,
aluminum fluoride (AlF3), and cryolite. Fluorite has the lowest solubility in water (16 mg/L at 20 ºC) and
cryolite has moderate solubility in water (420 mg/L at 20 ºC). Aluminum fluoride has an increased
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solubility in water of 6,700 mg/L at 20 ºC. KF and NaF represent the most soluble sources of fluoride
with solubility in water at 20 ºC of 95,000 mg/L and 40,400 mg/L, respectively. NaF and KF are often
used in toxicity testing of fluoride for both aqueous and solid matrices. The ecotoxicity of fluoride is
discussed for aquatic and terrestrial receptors below.
The toxic action of fluoride is linked to the strong electronegative state of fluoride ions, which act as
enzymatic poisons. Key enzymes, for which their activity can be compromised by the presence of
fluoride ions include: phosphatase, hexokinases, enolase, succinic, dehydrogenase, pyruvic oxidase, and
others (Camargo, 2003). The decreased enzymatic activity results in interruption of key metabolic
processes, such as glycolysis and protein synthesis (Kessabi, 1984). The specific mechanism that causes
the decoupling of metabolic processes due to enzymatic activity inhibition is not fully understood.
Increased fluoride concentration, exposure time, and water temperature increases the toxic effects of
fluoride to aquatic invertebrates (Camargo, 2003). Inorganic fluorides in solution can be removed from
the aquatic phase by precipitation in the presence of calcium carbonate, calcium phosphate, calcium
fluoride and magnesium fluoride (Stumm and Morgan, 1996). Therefore, harder or more saline water
tends to be less toxic to aquatic invertebrates. An evaluation of available literature for freshwater acute
and chronic effect endpoint data indicated that Hyalella azteca, an amphipod, exhibits the greatest
sensitivity to fluoride among the freshwater invertebrate species used for toxicological testing. The 10
and 50 percent inhibition concentrations (IC10 and IC50) were 1,800 and 4,100 µg F/L, respectively at a
hardness of 90 mg/L CaCO3 and chloride content of 2,000 µg Cl/L (Pearcy et al., 2015). However, further
review and assessment of the low H. azteca effect concentrations by Parker et al. (2021) found that the
low fluoride IC10 was attributed to chloride sensitivity in the genetic strain of the amphipod test
organisms used in the toxicity test. Therefore, the test conditions would have resulted in effects to the
receptor that were not related to fluoride exposure.
Increased fluoride concentration, exposure time, and water temperature also increases the toxic effects
of fluoride to fish (Camargo, 2003). However, increasing intraspecific fish size and increasing calcium and
chloride concentrations in water tends to decrease the toxic effects of fluoride to fish. Based on recent
work by Pearcy et al. (2015), it appears that chloride concentration in surface water has a greater
influence on the reduced toxicity of fluoride to freshwater organisms than calcium carbonate. Chloride
concentration in water does reduce the toxic effects of fluoride to certain species; however, chloride
does not mitigate toxic effects for all species. A preliminary evaluation of available literature for
freshwater acute and chronic effect endpoint data indicated that Oncorhynchus mykiss, the rainbow
trout, exhibits the greatest sensitivity to fluoride among the freshwater fish species used for
toxicological testing. The IC10 and IC50 were 6,000 and >64,100 µg F/L for rainbow trout, respectively, at
a hardness of 6 mg/L CaCO3 and chloride content of 2,000 µg Cl/L (Pearcy et al., 2015).
Depending upon concentration, exposure time, and species, fluoride can have inhibitory or enhancing
effect on freshwater algal growth (Camargo, 2003). Like terrestrial plants, fluoride content in aquatic
macrophyte tissue increases with increasing water concentration and exposure time. A preliminary
evaluation of available literature for freshwater acute and chronic effect endpoint data for aquatic
plants indicated that Chlorella vulgaris, a green algae, exhibits a sensitivity to fluoride. The non-
inhibitory concentration and lethal concentration in 50 percent of the test organisms (LC50) were
66,500 and 380,000 µg F/L, respectively at a pH of 6.8 (Rai et al., 1998).
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A recent meta-analysis conducted by Parker et al. (2022) assessed the utility of hardness, alkalinity, and
chloride as toxicity modifying factors (TMFs) in fluoride empirical bioavailability models for freshwater
taxa. Toxicity data from the acute (n = 20) and chronic (n = 17) studies were reviewed and summarized.
A portion of the available toxicological studies were used to assess the influence of TMFs on acute
fluoride toxicity based on the availability of reported TMFs in the literature. The broader dataset was
used to estimate relevant acute and chronic limits when toxicity modifying factors were not explicitly
considered. Genus Mean Acute Values (GMAVs) of median lethal effects concentrations for
representative invertebrate taxa that could be expected in Little Mountain Creek ranged from 32.3 to
44.9 mg/L fluoride (genera: Hexagenia, Hyalella, Hydropsyche, Chimarra and Streptocephalus). The
GMAV of LC50 concentrations for the most conservative fish receptor, the rainbow trout (Oncorhynchus
mykiss), was 79.9 mg/L fluoride (Parker et al., 2022).
A fluoride preliminary final acute value (FAV) of 30.6 mg/L fluoride was calculated from the cumulative
probability distribution of the above GMAVs and 19 additional (less-sensitive) receptors (Figure 3-9A).
The most conservative GMAVs and calculated FAV were greater than the highest fluoride concentration
observed within surface water, seep water, or groundwater within the Little Mountain Creek floodplain
or Little Mountain Creek.
Given the sparse availability of suitable chronic fluoride toxicity literature, Parker et al. (2022) calculated
final chronic values (FCVs) using two different approaches. First, an acute-to-chronic ratio (ACR)
approach was used to convert FAVs to final chronic values (FCVs). Applying an ACR of 5.4 to the derived
FAV resulted in a FCV of 5.7 mg/L fluoride. Parker et al. (2022) also assessed chronic data using a
cumulative probability distribution approach of available genus mean chronic values (GMCVs), which
resulted in an FCV of 4.0 mg/L (Figure 3-9B). The most conservative chronic study was for the benthic
invertebrate Chironomus dilutus, which exhibited growth effects at a fluoride concentration of 4.1 mg/L.
McPherson et al. (2014) recently published chronic benchmarks for fluoride using Canadian derivation
approaches and found that a concentration of 1.94 mg/L fluoride was protective of effects to freshwater
taxa. In this study, the low chloride test conditions of the most sensitive taxa informing the chronic
benchmark of 1.94 mg/L, Hyalella azteca, was found to act as a statistical pivot point that decreased the
derived benchmark. Although the ACR-based approach contains the most-robust toxicological dataset
for deriving protective values, the more conservative FCV of 4.0 mg/L is recommended as the most
suitable chronic effect concentration for fluoride.
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Adapted from Parker et al. (2022)
Figure 3-9 Acute and Chronic Effects Cumulative Probability Distributions of Geometric Mean
Values
To further support the understanding of fluoride toxicity to aquatic receptors associated with the ABL,
water samples from the Wet Well were collected in October 2022 to conduct focused whole effluent
toxicity (WET) testing. Seven (7) day reproduction ecotoxicity testing was conducted on Ceriodaphnia
dubia using North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure, Version 3.0
(NCDENR, 2010). Water from the ABL Wet Well was sampled as source water along with dilution sources
from Little Mountain Creek and the Unnamed Tributary. NC standard test water, moderately hard
synthetic water (MHSW), was also used as a laboratory dilution water source for the tests. Details of the
study are provided in Appendix D and key findings from the study are summarized below:
• The 25 percent inhibitory concentration for a 7-day chronic C. dubia neonate reproduction WET
test occurred at 53.8 percent Wet Well water when mixed with Little Mountain Creek water.
This indicates that a 1-to-1 dilution of ABL water with Little Mountain Creek water would
prevent unacceptable chronic effects to C. dubia.
• The concentration of fluoride in the ABL Wet Well during sampling was 20-22 mg/L. Therefore,
based on the site-specific conditions evaluated, fluoride concentrations that correspond to C.
dubia chronic effects were between 10.8 and 11.8 mg/L.
• The fluoride concentration in tests resulting in chronic effects in C. dubia was greater than both
the literature supported C. dubia effects concentrations and the effects concentration in MHSW,
indicating that TMFs may be further reducing the toxicity of fluoride.
• Concentrations of fluoride in the WET test corresponding to an observed chronic effect are an
order of magnitude greater than the promulgated 15 NCAC 02B Surface Water Guidelines for
fluoride.
• WET test controls containing 100 percent Little Mountain Creek water and 100 percent
Unnamed Tributary water had greater neonate reproduction rates than organisms tested in
standard laboratory synthetic water, demonstrating the lack of chronic effects in these water
bodies.
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• Results of chronic toxicity testing provide support that additional TRIAD testing in Little
Mountain Creek to assess fluoride ecotoxicity is not warranted.
• Further refinement of the fluoride ESV in the BERA is proposed.
In terrestrial environments, fluoride can have effects on plant roots and aboveground vegetation
depending on uptake mechanisms, as well as the age and source of fluoride. Plants can take up fluorides
from soil and transfer them to foliar tissues through xylematic flows (Fornasiero, 2001). When taken up
by roots, some residual fluoride is accumulated into root tissue; however, much of the fluoride is
transported to shoot or leaf biomass (Jha et al., 2009).
In addition to potential uptake from soil, gaseous fluorides can be absorbed through leaf stomata and be
transferred to foliar tissues through xylematic flows (Zouari et al., 2014). When exposure is
predominately atmospheric, accumulation of fluoride in plant roots is much less than when exposure is
predominately through soil sources (Baunthiyal et al., 2014). However, the uptake of fluoride into foliar
tissue has been shown to decrease, coincident with decreasing atmospheric fluoride concentrations. For
example, Horntvedt (1995) found no apparent long-term effects in spruce and pine needles from
fluoride accumulation into foliar tissues over a period of approximately 25 years with coincidental
decreases in atmospheric fluoride emissions. This suggests that both the age and source of fluoride
contamination may affect its uptake and toxicity within the terrestrial environment.
The most common visible symptom of fluoride toxicity in terrestrial plants is foliar damage (leaf
necrosis). This occurs due to several morphological modifications to the upper and lower epidermis.
Collapse of mesophyll results in cell distortion and sharpening (Fornasiero, 2001). Leaf necrosis can
occur along the leaf margin (sides) or at the tip of the leaf (apical leaf necrosis).
High internal fluoride concentrations affect multiple physiological and metabolic plant processes (Yadu
et al., 2016). Elevated fluoride can reduce growth and development, affect rates of photosynthesis, and
disrupt multiple enzymatic processes. However, the effects of fluoride on growth and development of
terrestrial plants vary considerably between species (Baunthiyal et al., 2014). Coniferous trees have
been identified as sensitive plant species for exposure to fluoride. Zwiazek and Shay (1988) reported a
lowest observed effect concentration (LOEC) for Pinus banksiana (jack pine) seedlings for growth of 3
mg F/kg dry weight of sand. Effects were observed after 29 hours. Arnesen (1997) reported a LOEC for
Lolium muliflorium (ryegrass) growth of 400 mg F/kg dry weight.
The effect of fluoride on terrestrial invertebrates is not as well studied as the effects on plants and
higher trophic levels. Increased fluoride concentration and exposure time has been shown to increase
fluoride body burden to the terrestrial invertebrate Eisenia fetida (Lawson and Yu, 2003). The
accumulation of fluoride by numerous other invertebrates from fluoride contaminated soils has also
been studied (Buse, 1986).
The fluorination of soils by the addition of super phosphate fertilizers (e.g., monocalcium phosphate,
Ca(H2PO4)2) has resulted in many studies which focus on the effects of fluorides on grazing animals such
as sheep and cows. Ingestion is the primary exposure route for fluoride in higher trophic level
organisms. Fluoride compounds are absorbed in the stomach and small intestine, where acidic
conditions can convert recalcitrant forms of fluoride into more bioavailable forms (Cronin et al., 2000).
Threshold soil fluoride concentrations for cattle and sheep were between 326 and 1,085 mg F/kg soil dry
weight (dw) and 372 and 1,461 mg F/kg soil dw, respectively. More recent evaluation of terrestrial
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exposure by Pascoe et al. (2014) found that the lowest no observed adverse effects level (NOAEL) and
lowest observed adverse effects level (LOAEL) risk-based concentrations were 149 mg F/kg soil dw and
659 mg F/kg soil dw, respectively.
One key consideration to the ecotoxicity of fluoride in soils is the degree to which fluoride is adsorbed to
soil particles. Fluoride adsorption is greatest in acidic non-calcareous soils containing aluminum
hydroxides, where fluorides occur predominantly as aluminum fluorosilicate complexes (Pascoe et al.
2014). In slightly alkaline soils with sufficient calcium carbonate (CaCO3), soluble fluoride would be most
likely completely fixed as CaF2 (Brewer, 1966) and less bioavailable. However, an increasing electrostatic
potential at even higher pH decreases the retention of fluoride on the soil and increases solubility. This
is partially attributed to the displacement of adsorbed fluorine by the increased concentration of
hydroxide ions (Larsen & Widdowson, 1971).
The literature regarding fluoride bioavailability and toxicity summarized in this section will be used to
support the development of ecological benchmark concentrations for relevant exposure media in the
Effects Analysis of the BERA Report. The derivation of ecological benchmark concentrations will consider
the site-specific conditions in terrestrial, transitional, and aquatic exposure areas that may influence
fluoride bioavailability and toxicity to representative ecological receptors.
3.3.1.3 Polychlorinated Biphenyls
PCBs are a class of chlorinated organic carbons with 209 potential congeners. Each PCB molecule is
characterized by a biphenyl backbone, with 1 to 10 chlorine atoms attached. PCB congeners may be
classified by homolog groups that consist of PCB congeners containing the same number of chlorine
atoms. PCBs may also be classified as “Aroclors,” which were commercial PCB mixtures manufactured by
Monsanto Chemical Company for various industrial uses (e.g., use in transformers and capacitors,
hydraulic fluids, printing inks) from 1929 to 1977. In the United States, more than 90 percent of PCBs
used included Aroclors 1016, 1242, 1254, and 1260, which were unique mixtures of up to 50 individual
congeners each. The last two digits of each Aroclor name referred to the percentage of chlorine by
weight in the mixture. In the United States, primary use of Aroclors included nominally closed
applications in capacitors, transformers, and heat transfer and hydraulic fluids. More specifically, the
following individual Aroclor mixtures were commonly used in the following:
• Aroclor 1016 was used in capacitors.
• Aroclor 1242 was used in transformers, in hydraulic fluids, for heat transfer, and in production
of rubber, carbonless copy paper, polyvinyl acetate, and wax extenders.
Aroclor 1248 was used in hydraulic fluids, vacuum pumps, and production of rubber, polyvinyl
chloride (PVC), and epoxy resins.
• Aroclor 1254 was used in transformers, capacitors, hydraulic fluids, vacuum pumps, cuttings oils,
inks, and in production of wax extenders, synthetic resins, dedusting agents, pesticides, sealants
and caulking compounds, PVC, ethylene vinyl acetate, and chlorinated rubber.
• Aroclor 1260 was used in transformers and hydraulic fluids, and in production of PVC, polyester
resins, varnish, and dedusting agents.
As a group, PCBs are stable, with low water solubility and degradation potential, and are thus
recalcitrant and persistent in the environment. The fate and transport of PCB congeners is controlled by
environmental processes and their physicochemical properties. Generally, more chlorinated, higher
weight PCB congeners are less water soluble, less volatile, bind more readily to organic matter and solid
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media, and bioaccumulate. In contrast, the opposite pattern is true for less chlorinated, lighter weight
PCB congeners. This range of physicochemical properties allows PCBs to move among major
environmental compartments including soil, air, water, sediment, and biota. PCBs, however, primarily
partition to solid and organic media; therefore, sediment and soil may act as reservoirs of PCBs, which
can be slowly released to the environment over time (NRC, 2001).
Weathering and degradative processes may affect the original composition of Aroclor mixtures. These
processes may include volatilization and dissolution of lower weight congeners, strong adsorption of
higher molecular weight congeners, and anaerobic reductive dechlorination of the PCB structure.
Analysis of homolog groupings can be useful for the assessment of weathered PCB congeners.
PCBs can be divided into two classes based on their toxic effects. Non- and mono-ortho-substituted
PCBs (dioxin-like PCBs) act similarly to 2,3,7,8-tetrachlorodibenzop-dioxin and can cause a range of
health effects. PCBs with two or more ortho chlorines (non-dioxin-like PCBs) may elicit a different suite
of effects including endocrine disruption, neurotoxicity, behavioral changes, cancer, and thyroid disease.
Toxicity also varies between PCB congeners and measured effects of mixtures, which may be the result
of interactive, additive, synergistic, or antagonistic toxicity (National Research Council [NRC], 2001).
Toxic effects vary between receptor organisms, but invertebrates are generally less affected by PCBs
than vertebrates due to the absence of the aryl hydrocarbon receptor in invertebrates (West et al.,
2009). However, the ability of invertebrates to bioaccumulate or biomagnify relatively high
concentrations of PCBs in the absence of toxic effects emphasizes the need to consider bioaccumulation
and biomagnification exposure pathways to potentially sensitive vertebrate species.
3.3.1.4 Polycyclic Aromatic Hydrocarbons
PAHs are a group of organic compounds that contain at least two condensed aromatic ring structures.
When a PAH has three or less condensed aromatic rings, it is considered a low molecular weight PAH
(LMW PAH). When it has four or more aromatic rings, it is considered a high molecular weight PAH
(HMW PAH; USEPA, 2007a). During the production of aluminum using the Hall-Héroult process, carbon
anodes and cathodes are used to conduct electricity through the alumina to produce molten aluminum.
The coal tar pitch and coke used to create carbon anodes and cathodes contain multiple PAH
compounds. The ecotoxicity of PAHs in aquatic and terrestrial environments are discussed below.
In aquatic environments, it is generally accepted that PAH compounds exert toxicity to benthic
invertebrates primarily by a narcosis mode of action (USEPA, 2003; DiToro et al., 2000; Swartz et al.,
1995; Russom et al., 1997; McGrath et al., 2004). Narcosis is a nonspecific, reversible disruption of
neural activity (i.e., anesthesia). Based on the similar mode of action of PAH compounds, the toxicity of
multiple PAH compounds in a sediment mixture is approximately additive; therefore, exposure to the
PAH mixture must be evaluated to assess potential toxicity in sediment (USEPA, 2003). The composition
of individual compounds within PAH mixtures and the relative contribution of those compounds to the
additive toxicity to the benthic community vary depending on the source of PAHs.
Additional modes of ecotoxicity include phototoxicity, whereby exposure to ultraviolet (UV) light
increases the toxicity of PAHs. Phototoxicity has been demonstrated in aquatic environments (van
Brummelen et al., 1998; Weinstein and Polk, 2001). However, comparisons by Swartz et al. (1995)
suggest that responses of benthic communities in PAH-contaminated sites correlate well with the
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toxicity that is predicted based on narcosis, suggesting that phototoxicity was not a major confounding
factor for those environments.
Similar to aquatic receptors, the primary mode of toxicity of PAHs to terrestrial invertebrates is through
narcosis (Sverdrup et al., 2002). Soluble phases of PAH compounds found in interstitial pore waters
present the greatest risk to invertebrates through ingestion or incidental ingestion. For LMW PAHs 10
percent effect concentrations (EC10) for reproduction or growth for several invertebrate species ranged
from 8 to 113 mg/kg dw, whereas the EC10 or the maximum acceptable toxicant concentration (MATC)
for soil invertebrates exposed to HMW PAHs ranged from 10 to 80 mg/kg dw (USEPA, 2007a). Higher
molecular weight PAH compounds generally exhibit greater toxicity to organisms, particularly mammals
due to the carcinogenic and mutagenic properties. Mammalian insectivores, the most sensitive receptor
group, can have a variety or physiological responses to PAH exposure (USEPA, 2007a).
The literature regarding PAH bioavailability and toxicity summarized in this section will be used to
support the development of ecological benchmark concentrations for relevant exposure media in an
interim deliverable establishing refined ESVs, as well as the Effects Analysis of the BERA Report. The
derivation of ecological benchmark concentrations will consider the site-specific conditions in terrestrial,
transitional, and aquatic exposure areas that may influence PAH bioavailability and toxicity to
representative ecological receptors.
3.3.1.5 Metals
The availability of metals to be incorporated into biological tissues does not necessarily correspond with
the total concentration of metals in soil, sediment, or surface water; bioavailability is directly related to
the speciation of metals. For most divalent metals, the most bioavailable and toxic forms of metals are
the metal ions or small metal-anion complexes, which are present at very low concentrations in the
environment. Most metals in sediment are not available for uptake due to strong complexation by solid
phases. For example, metals precipitated as metal-sulfide ligands may be resistant to solubilization
under typical geochemical conditions observed in sediment or sediment pore water (Sigg and Behra,
2005).
Many metal compounds are essential to maintaining cellular homeostasis. However, when metal
concentrations exceed what is needed to maintain normal organismal functions, toxic effects can occur
(Valko et al, 2005). Metal-induced toxicity can occur by several mechanisms in organisms, including
hepatotoxicity (liver toxicity), neurotoxicity (brain toxicity), and nephrotoxicity (kidney toxicity). Iron,
copper, chromium, vanadium, and cobalt can undergo redox-cycling reactions that can lead to
deleterious types of oxidative stress. Mercury, cadmium, and nickel can deplete glutathione, which is an
essential antioxidant in organisms. Arsenic primarily acts on organisms by binding to thiols, which can
disrupt important enzymatic functions (Valko et al, 2005). The ability of metals to bioaccumulate within
organisms varies depending on the receptor group and type of metal. Some metals biomagnify (e.g.,
mercury), or increase in concentration within receptor tissues moving up to higher trophic level.
The literature regarding the bioavailability and toxicity of metals summarized in this section will be used
to support the development of ecological benchmark concentrations for relevant exposure media in an
interim deliverable establishing refined ESVs, as well as the Effects Analysis of the BERA Report. The
derivation of ecological benchmark concentrations will consider the site-specific conditions in terrestrial,
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transitional, and aquatic exposure areas that may influence metal bioavailability and toxicity to
representative ecological receptors.
3.3.2 Assessment Endpoints, Risk Questions, and Measurement Endpoints
Assessment endpoints are identified to explicitly express the environmental value that is to be protected
(USEPA, 1997a). Measurement endpoints are qualitative or quantitative observations that will be
measured for each receptor category in each exposure area to evaluate the assessment endpoint. Risk
questions were formulated to identify specific measurable ecological characteristics that could be used
to evaluate the selected assessment endpoints. These measurement endpoints represent numerical
observations that will be measured in ecological exposure areas and compared to similar observations
measured at reference sites or reported in the literature (e.g., effects thresholds). The selected
measurement endpoints will be used in a weight-of-evidence assessment of risk to each representative
receptor based on the identified assessment endpoints.
Based on the problem formulation and ECSMs presented in the preceding sections, preliminary
assessment endpoints, risk questions, and measurement endpoints were formulated for permanent
aquatic, transitional, and terrestrial exposure areas identified in Section 3.1.1 (Figure 3-1). A summary of
the preliminary risk questions and measurement endpoints selected for each preliminary assessment
endpoint is provided in Table 22 for the Little Mountain Creek aquatic exposure area, Table 23 for the
Little Mountain Creek floodplain wetland/drainage exposure area, and Table 24 for the Little Mountain
Creek floodplain upland exposure areas.
Preliminary assessment endpoints do not include potential exposure to species of concern. As discussed
in Section 3.1.2, Schweinitz’s sunflower is not expected to occur within the ABL BERA study area.
Further, tricolored bat is currently proposed as a federally endangered species but is not formally listed.
Further evaluation of the assessment endpoints for species of concern will be conducted as part of the
BERA Problem Formulation based on field observations and any changes in regulatory status for species
of concern. Consistent with ERAGS, exposure to threatened or endangered species potentially present
within exposure areas will be evaluated based on the individual level of organization, as opposed to
population or community levels. Measurement endpoints for threatened or endangered species
potentially exposed within the BERA study area will be based on comparisons of average daily doses to
NOAEL toxicity reference values (TRVs). Additional considerations for these assessment endpoints will
include an assessment of the potential for species of concern to occur in site exposure areas based on
documented occurrences and the potential for suitable habitat to support species of concern. The
following section presents a conceptual study design to collect data to support the evaluation of
measurement endpoints in the BERA.
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4 BERA Conceptual Study Design
This section presents a conceptual study design based on the preliminary BERA problem formulation
presented in Section 3. The supplemental BERA investigation is intended to address comments provided
by NCDEQ on the ABL SLERA, as well as any additional data gaps identified through the problem
formulation. The aim is to collect suitable data to support the evaluation of assessment endpoints and
risk questions based on defined measurement endpoints for aquatic, transitional, and terrestrial
exposure areas at the Site.
Sections 4.1 and 4.2 discuss an analysis of data gaps identified in the ABL SLERA and the NCDEQ
comments on the ABL SLERA and present a plan for collection of additional data during 2023 to support
the BERA process.
4.1 SLERA Data Gap Analysis
An analysis was conducted on the data gathered from historical investigations and ABL SLERA findings to
identify data gaps in existing information to support the BERA problem formulation. The data gap
analysis also incorporates NCDEQ comments on the SLERA to identify data needs in the ecological risk
assessment process for the Site.
Based on this analysis, primary data gaps to be addressed in the supplemental BERA investigation
include the following:
• Spatial coverage of samples: Available analytical surface soil data gathered from previous
investigations provides inadequate spatial coverage (Figure 2-7). The available data are
inadequate to determine reliable Site-specific ecological exposure point concentrations,
particularly due to the lack of samples collected in the central and western portions of the Little
Mountain Creek floodplain. Existing sediment and surface water data are adequate for the
purposes of the screening level assessment. However, the ABL SLERA indicates that additional
sampling of surface water and sediment may benefit nature and extent evaluations.
• Site-specific background conditions: A lack of data characterizing background concentrations in
soil and surface water exists for the Site. These concentrations are a necessary line of evidence
to evaluate the extent and magnitude of on-site presence of COPECs. Assessment of additional
sediment and/or sediment pore water background conditions may also be warranted.
• Representativeness of existing Site data: Available analytical data from historical Site
investigations were considered in the development of the BERA Work Plan; however, some of
these investigations were conducted prior to remedial works performed at the Site and may not
accurately represent current exposure conditions. Data collected as part of the Supplemental
BERA Investigation will be evaluated against historical data and refinement to the dataset
included in exposure characterization may be warranted based on trend analyses or other
changes induced by landfill corrective actions over time.
• Exposure over a full range of surface water flow conditions: Several ephemeral drainage ditches
exist within the Little Mountain Creek floodplain. Due to the intermittent nature of these
features, it is possible that the previous sampling events did not adequately characterize the
surface water discharge from each ditch to Little Mountain Creek and the floodplain over the
full extent of flow conditions. Available discharge data and precipitation at the Albemarle
Airport coincident with previous sampling events will be evaluated to determine if the full range
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of conditions have been adequately represented. If warranted, additional sampling events will
be performed, with focus placed on sampling during the low (base) and high flow conditions to
capture the range of exposure conditions.
• Site-specific ecological effects data: Ecological exposure evaluations at the Site have been solely
based on analytical chemistry data for various media gathered from previous investigations. It
may be necessary to directly collect information on ecological effects potentially occurring at
the Site to more accurately compare Site-specific effects to literature-based ecological effects
criteria, as well as expected regional background effects.
• Ecological receptor characterization: Potential ecological receptors have not been fully
characterized for the Eastern and Middle Drainage Ditches (SA and SB, respectively).
Characterization of these receptors is necessary for evaluating potentially complete ecological
exposure pathways at these portions of the Site. Additionally, Site-specific representative
species will need to be characterized to inform wildlife exposure and ingestion models, as well
as target species for tissue sample collection.
• COPEC bioaccumulation/biomagnification: Site-specific data do not exist to assess the potential
bioaccumulation and biomagnification of Site-related COPECs in organisms within the Little
Mountain Creek and floodplain exposure areas, particularly for PCBs, as identified in the ABL
SLERA comments. Desktop assessment of the potential for dietary exposure will be an important
component in refining exposure pathways and COPEC migration.
Additional data collected as part of the supplemental BERA Investigations will be integrated with
previous Site data to support additional analyses in the BERA that were not presented in the SLERA,
including:
• Dietary exposure modeling: Risk estimates in the SLERA did not explicitly evaluate exposure via
direct and indirect ingestion pathways. These pathways were qualitatively addressed through
the conceptual site model; however, it is necessary to quantitatively evaluate them to bolster
understanding about specific Site exposure mechanisms with empirical evidence. The analysis of
ingestion pathways includes direct ingestion of surface water by wildlife. Assessment of wildlife
ingestion pathways will also be used to understand potential for PCBs to be present in fish
tissue.
• A tiered approach to consider Site-specific ecotoxicity assessment will also be considered.
Consistent with the objectives of Step 1 and 2 of ERAGS, the SLERA presented a conservative screening
of total recoverable data that were used to characterize the nature and extent of constituent
concentrations at the Site. However, additional data that evaluate the Site-specific factors influencing
COPEC bioavailability and toxicity are warranted to support Site-specific risk-based decision-making in
the BERA. Specific factors that will be evaluated in the BERA to understand COPEC bioavailability in
exposure media at the Site include:
• Soil pH: Influences the bioavailability and toxicity of aluminum and other metals in terrestrial
soils.
• Organic carbon content: Influences the partitioning and bioavailability of metals and organic
COPECs in soil and sediment.
• Available cyanide: Represents the bioavailable and potentially toxic form of cyanide, primarily
present in aqueous media (e.g., surface water, pore water).
• Dissolved metals in surface water: Dissolved metal fraction is an operational definition
represented by filtered surface water sampling (0.45-µm pore size filter). Results are indicative
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of the bioavailable and potentially more toxic fraction of metals. Surface water quality
benchmarks for many metals are derived based on exposure to dissolved metals.
• Sediment pore water: The bioavailability and toxicity of sediment COPECs is correlated with the
fraction of COPECs dissolved in sediment pore water rather than the bulk sediment COPEC
concentrations (USEPA, 2007b, 2003, 2008b).
4.2 Conceptual BERA Investigation Approach
This section presents a conceptual investigation approach to address data gaps identified in Section 4.1
for the SLERA. These conceptual approaches will be used to guide the BERA investigation.
A tiered approach is proposed to systematically address the identified data gaps and NCDEQ comments
on the ABL SLERA. The initial investigation will comprise a Site reconnaissance and aquatic receptor
presence/absence assessment. Information from this work will inform Tier I investigations, which are
focused on characterizing Site-specific exposure conditions across a range of hydrologic conditions
within Little Mountain Creek. Information from the Tier I investigation will be reviewed following each
round of proposed data collection to assess whether the complete analytical suite proposed is needed
to address the data quality objectives (DQOs). Any adjustment to the analytical suite or deviations to the
proposed scope will be communicated to NCDEQ. Field data collection as part of Tier I will be limited to
bulk sediment, soil, groundwater, pore water, and surface water chemical analyses. This adaptive
approach will focus the BERA to constituents that are most likely to be driving risk, if identified. The Tier
II investigation will address data gaps associated with the dietary exposure or direct contact toxicity
through a sediment quality triad approach if information obtained through Tier I does not provide
conclusive evidence on the presence of unacceptable risk.
A program summary of the supplemental BERA investigation is provided in Table 4-1. The summary
table provides objectives and rationale for each investigation tier along with the proposed analyses and
quantity of proposed samples. DQOs were developed to evaluate Site-specific ecological risk based on
identified assessment endpoints, risk questions, and measurement endpoints defined in the baseline
problem formulation. The development of the study design was guided by the USEPA DQO process
(2000), which is a seven-step planning approach to develop sampling designs for data collection
activities that support decision making. Per USEPA (1997a), the goals of the DQO process in the context
of ERAGS are to:
• Clarify the study objective and the most appropriate types of data to collect
• Determine the most appropriate field conditions under which to collect the data
• Specify acceptable criteria that will be used as the basis for establishing the quantity and quality
of data needed to support risk management decisions
The overarching DQO for the supplemental BERA investigation is to obtain adequate information to
draw conclusions regarding whether risks to ecological receptors within Little Mountain Creek and its
floodplain are acceptable. If unacceptable risk to ecological receptors exist, information from the BERA
will be used to support subsequent decision making as part of the RCRA corrective measures process.
Section 4.2.1 describes how the proposed sampling plan addresses outstanding data gaps regarding
spatial adequacy, surface water flow conditions, and refined exposure point concentration evaluation.
Section 4.2.2 describes how bioavailability and toxicity assessment will be evaluated using the tiered
approach. Section 4.2.3 describes the proposed background characterization. Section 4.2.4 describes
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the proposed timeline for the sampling program and how information collected from each campaign will
direct subsequent campaigns. Details on the proposed analytical suites for the supplemental BERA
investigation is provided in Table 25.
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Table 4‐1  Supplemental BERA Investigation Sampling Program Summary 
Objectives and Rationale 
Number of 
Samples by 
Matrix 
Analyses Target Date(s) 
Site and Aquatic Receptor Reconnaissance  
Objectives: 
•Conduct preliminary assessment of aquatic receptor presence/absence (pending weather 
conditions)within the transitional habitat ditch features. 
•Determine whether areas of groundwater‐surface water interactions exist along the eastern 
bank of Little Mountain Creek. 
•Identify fine‐grained depositional sediment deposits and confirm suitability of identified 
locations of proposed sampling stations. 
Rationale: 
•Current investigation approach assumes that the jurisdictional ditch features do not provide 
persistent habitat to aquatic receptors. 
•Identification of areas within Little Mountain Creek that have hydrological connectivity with 
groundwater will provide the most conservative estimate of exposure conditions. 
Site 
Reconnaissance 
FLIR survey and 
aquatic receptor 
presence/absence 
Q1 2023 
Tier I – Characterization of Site‐Specific Exposure Conditions  
Soil Sampling Objectives: 
•Evaluate hydric and upland soil conditions in the Little Mountain Creek floodplain to address 
spatial and analytical data gaps and refine exposure estimate for terrestrial and semi‐aquatic 
receptors. 
•Expand assessment of soil to an upgradient background area to characterize site‐specific 
background conditions for the refined effects assessment. 
Soil Sampling Rationale: 
•Address key data gaps identified in the ABL SLERA and NCDEQ Comments. 
•Expand analytical suite for Study Area soil dataset. 
•Provide a robust dataset for BERA SMDP and stakeholder communication. 
Bulk surficial soil 
(0 to 1 ft) 
sampling in: 
 ‐Floodplain 
Forest (20 
samples x 1 
event) 
 ‐Floodplain 
Wetland (22 
samples x 1 
event) 
 ‐Background 
Floodplain (10 
hydric samples x 
1 event and 10 
upland samples x 
1 event ) 
General 
chemistry, 
Inorganics, 
Metals, PAHs, 
SVOCs, and PCBs* 
Q2 2023 
Sediment Sampling Objectives: 
•Evaluate sediment conditions in Little Mountain Creek to address spatial and analytical data gaps 
and refine exposure estimate for aquatic and semi‐aquatic receptors. 
•Expand assessment of sediment to an upgradient background area to characterize site‐specific 
background conditions for refined effects assessment. 
Sediment Sampling Rationale: 
•Address key data gaps identified in the ABL SLERA and NCDEQ Comments. 
•Provide a robust dataset for BERA SMDP and stakeholder communication. 
Bulk surficial 
sediment (0 to 1 
ft) sampling in: 
 ‐Little Mountain 
Creek (7 samples 
x 1 event) 
 ‐Upgradient 
Little Mountain 
Creek (2 samples 
x 1 event) 
General 
chemistry, 
Metals, PAHs, 
SVOCs, and PCBs* 
Q2 2023 
Surface Water/Pore Water Objectives: 
•Evaluate surface water and pore water conditions in Little Mountain Creek across a range of 
hydrologic conditions to address the spatial and temporal data gaps and refine exposure 
estimates for aquatic and semi‐aquatic receptors. 
•Assess the presence/absence of aquatic receptors within the transitional habitat ditch features. 
Surface Water/Pore Water Rationale: 
•Address key data gaps identified in the ABL SLERA and NCDEQ Comments. 
•Assess exposure conditions in pore water as an additional line of evidence for sediment COPEC 
bioavailability. 
•Current investigation approach assumes that the jurisdictional ditch features do not provide 
persistent habitat to aquatic receptors. 
•Evaluate dissolved fraction concentrations of metals and water quality parameters as a more 
reliable indicator of potential bioavailability and toxicity.  
•Provide a robust dataset for BERA SMDP and stakeholder communication. 
Surface 
water/pore 
water sampling 
in: 
 ‐Little Mountain 
Creek (7 samples 
x 2 events**) 
 ‐Upgradient 
Little Mountain 
Creek (2 samples 
x 2 events**) 
 ‐Wetland Ditch 
Features (2 
samples x 2 
events**) 
General 
chemistry, 
Metals, PAHs, 
SVOCs, and PCBs* 
Q2 2023, 
and 
Q3 2023  

(potentially  
Q4 2023**) 
Groundwater Sampling Objective: 
•Evaluate groundwater conditions in the little Mountain Creek floodplain to address analytical 
data gaps related to source characterization. 
Groundwater Sampling Rationale: 
•Comprehensive understanding of potential constituents in floodplain groundwater is unknown. 
Groundwater 
sampling at 3 
locations 
downgradient of 
Alcoa/Badin 
Landfill x 2 
events** 
General 
chemistry, 
Metals, PAHs, 
SVOCs, and PCBs* 
Q2 2023, 
and 
Q3 2023  

(potentially  
Q4 2023**) 

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Objectives and Rationale 
Number of 
Samples by 
Matrix 
Analyses Target Date(s) 
Tier II – Refinement of Site‐Specific Exposure Conditions  
Sediment Quality Triad Sampling Objectives: 
•Assess potential risk to benthic invertebrate communities in aquatic exposure areas where bulk 
sediment and pore water analyses indicate COPEC bioavailability and toxicity in Tier I analyses. 
•Perform in situ evaluations of benthic community structure to assess potential differences. 
•Conduct ex situ evaluations of sediment toxicity to freshwater invertebrate test organisms. 
•Compare measured COPEC concentrations in sediment and pore water to literature‐derived 
benchmarks for sediment and aqueous exposures, respectively. 
Sediment Quality Triad Rationale: 
•Determine the bioavailability and potential toxicity of COPECs in sediment via direct 
measurement and a weight‐of‐evidence approach. 
Sediment Quality 
Triad sampling 
in: 
 ‐Little Mountain 
Creek (4 
stations) 
 ‐Little Mountain 
Creek 
Background (2 
stations) 
• Benthic 
community 
analyses 
• Sediment 
toxicity testing 
• Chemical 
analyses  
TBD, if 
warranted 
Surface Water Toxicity Testing Objectives: 
•Assess potential risk to water‐column invertebrate communities in aquatic exposure areas 
where surface water analyses indicate COPEC bioavailability and toxicity in Tier I analyses. 
•Conduct evaluations of surface water toxicity to freshwater invertebrate test organisms in long‐
term toxicity tests. 
Surface Water Toxicity Testing Rationale: 
•Determine the bioavailability and potential toxicity of COPECs in surface water via direct 
measurement. 
Surface water 
chronic toxicity 
testing using two 
freshwater 
species, 
Ceriodaphnia 
dubia and 
Pimephales 
promelas 
• Surface water 
toxicity testing 
TBD, if 
warranted 
Notes 
*PCB homolog results will be analyzed following initial collection to determine whether PCBs should be considered for evaluation in subsequent investigation phases. 
**2 sampling events are currently proposed for the Tier I assessment to capture a gradient of flow conditions in Little Mountain Creek during the spring and summer months. The 
need for additional sampling in conjunction with the Tier II assessment will be evaluated with NCDEQ after collection of Tier I samples. 
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4.2.1 Analytical Characterization Data
Additional data will be collected during the BERA Investigation to supplement representative data from
the ABL SLERA to further define the nature and extent of COPECs. The design of the sampling plan for
the collection of additional characterization data to support the supplemental BERA investigation will
include the following considerations: spatial adequacy, surface water flow conditions, calculation of
exposure point concentrations, and a focused assessment of bioavailability and toxicity of relevant
COPECs.
4.2.1.1 Spatial Adequacy
The spatial adequacy of analytical data to characterize ecological exposure is limited, particularly in the
central and western portions of the Little Mountain Creek floodplain (Figure 2-7). Previous
investigations have characterized COPEC concentrations in soils in the Substation A and Substation B
adjacent exposure areas and the eastern portion of the Floodplain Forest; however, the central and
western portions of the Floodplain Forest exposure area remain largely uncharacterized (Figure 3-8). To
close this data gap, 20 soil samples will be collected from the 0 to 1 ft below ground surface (bgs)
interval during the BERA Investigation to characterize exposure point concentrations in the Floodplain
Forest exposure area (Figure 4-1). A pseudo-random sampling design will be employed to ensure
unbiased coverage of this terrestrial exposure area. The sampling design was achieved by buffering the
jurisdictional wetlands by 10 ft on either side of the boundary and randomly placing sampling stations to
maximize spatial coverage of point distribution in the upland floodplain area outside of the buffered
wetlands. The buffering approach was employed to avoid scenarios where sampling points would be
randomly assigned to a transitional area on the boundary of hydric and upland soils. Proposed sampling
location coordinates are provided in Table 26; however, these locations are subject to field
determination of suitability to ensure they are representative of hydric and non-hydric soil conditions.
Inadequate spatial coverage was also noted as a data gap for transitional exposure areas at the Site. As
discussed in Section 2.3.3, Floodplain Wetland areas containing hydric soils exist within the Floodplain
Forest that are intermittently inundated by Little Mountain Creek and are considered distinct exposure
areas (Figure 3-1). A total of 22 soil samples will be collected from these Floodplain Wetland exposure
areas at the 0 to 1 ft bgs interval to characterize exposure point concentrations (Figure 4-1). As with the
Floodplain Forest soil sampling, a pseudo-random sampling design will be employed to ensure unbiased
coverage of Floodplain Wetland exposure areas. The sampling design was achieved by buffering the
jurisdictional wetlands by 10 ft on either side of the boundary and randomly placing sampling stations to
maximize spatial coverage of point distribution within the wetlands. The buffering approach was
employed to avoid scenarios where sampling points would be randomly assigned to a transitional area
on the boundary of hydric and upland soils. Proposed sampling location coordinates are provided in
Table 26; however, these locations are subject to field determination of suitability to ensure they are
representative of hydric and non-hydric soil conditions.
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Figure 4-1 Proposed Sample Locations
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4.2.1.2 Surface Water Flow Conditions
Surface water samples collected to support the ABL SLERA may not represent an adequate range of
potential ecological exposure conditions in aquatic exposure areas at the Site. Due to intermittent flows
in the drainage ditches that convey surface water to Little Mountain Creek, exposure in these features
may also be intermittent in nature. Under varying flow conditions, Site drainage features can represent
incomplete, partially complete, or complete exposure pathways from upgradient areas on-site that may
result in variable exposure conditions within the Little Mountain Creek exposure area. Recent data for
select constituents obtained from Little Mountain Creek capture a variety of flow conditions during
multiple quarterly sampling events (Table 1). Therefore, the Tier I assessment is intended to capture
both spring conditions and summer conditions during an episodic event for surface water collection.
The assessment of the proposed surface water data, in conjunction with existing representative data will
be used to capture the full extent of potential flow conditions. Following Tier I sample collection, results
will be reviewed with NCDEQ and a third event may be considered during fall months when flows are
lower. Each surface water sampling event will comprise seven locations in the Little Mountain Creek
exposure area, one location in each of the two ABL BERA study area ditches that convey surface water
to Little Mountain Creek, and two locations in the Upgradient Little Mountain Creek Background area
(Figure 4-1). This approach will be conducted to characterize exposure point concentrations across a
range of flow conditions.
Given the coarse substrate present within Little Mountain Creek, epifaunal receptors will likely be the
dominant benthic receptor group present. Therefore, to adequately assess the benthic epifaunal
community, surface water samples will be co-located with pore water samples. Pore water will be
collected using a Henry Probe or equivalent active sampling instrument. Pore water stations will be
sampled during two separate sampling events. Each event will comprise seven locations in the Little
Mountain Creek exposure area, one location in each of the two jurisdictional ditches that convey surface
water to Little Mountain Creek, and two locations in the Upgradient Little Mountain Creek Background
exposure area (Figure 4-1). This approach will be conducted to characterize exposure point
concentrations for epifaunal receptors.
Focused sampling of fine-grained depositional sediment is also proposed within Little Mountain Creek to
address potential exposure to infaunal benthic receptors (Figure 4-1). Sediment samples will target
areas of deposition in backwaters or other features downstream of each identified surface water/pore
water station during a single sampling event. Depositional sediment samples will prioritize features
identified on the side of Little Mountain Creek based on feature availability. Sediment will be
characterized during a single sampling event and comprise seven locations in the Little Mountain Creek
exposure area and two locations in the Upgradient Little Mountain Creek Background exposure area
(Figure 4-1).
4.2.1.3 Exposure Point Concentrations
An additional consideration in evaluating the adequacy of data to support the BERA investigation is the
calculation of exposure point concentrations as part of the exposure analysis. As described further in the
risk analysis plan (Section 5), exposure point concentrations will include calculations of upper
confidence limit of the mean (UCLmean) concentrations based on 95 percent confidence or greater.
UCLmean concentrations will be calculated using USEPA ProUCL software (version 5.1), and the statistical
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approach will be consistent with USEPA ProUCL Version 5.1 Technical Guidance (ProUCL Technical
Guidance; USEPA, 2015b).
4.2.2 Bioavailability and Toxicity Assessment
As identified in the data gap analysis (Section 4.1), analytical parameters included in the ABL SLERA were
based on total recoverable concentrations in soil/sediment and total recoverable (unfiltered) results for
surface water. Total recoverable concentrations from bulk sediment and soil samples represent
concentrations that may be incorporated in mineral phases or bound to organic carbon within the
sediment/soil matrix and therefore not biologically available to ecological receptors. Total recoverable
concentrations in unfiltered surface water samples typically contain particulate- and colloidal-bound
fraction of COPECs that may not be bioavailable to aquatic receptors. Therefore, total recoverable
results can overestimate COPEC bioaccumulation and toxicity in exposure media. Further evaluation of
exposure in the BERA requires analyses of parameters that measure the bioavailable fraction of COPECs
and the Site-specific conditions that influence COPEC bioavailability.
The bioavailability and toxicity of COPECs identified in Site exposure media will be evaluated using a
tiered framework presented in the following sections for permanent aquatic, transitional, and terrestrial
exposure areas. The tiered approach includes possible lines of evidence that may be used as
measurement endpoints to support risk estimation in the BERA. The progression of analyses in the
tiered approach will be dependent on the findings of each tier. All potential tiers of analysis are included
in the BERA Work Plan to present the complete conceptual framework; however, implementation of
every tier may not be warranted and the decision to proceed to the next tier will be evaluated upon
completion of the analysis tier. The following sections present the conceptual approach for evaluating
the bioavailability and toxicity of COPECs within aquatic, transitional, and terrestrial exposure areas.
4.2.2.1 Little Mountain Creek Exposure Area
Based on current information, Little Mountain Creek is the only permanent aquatic exposure area within
the ABL BERA study area. Surface water analyses in aquatic exposure areas will include analyses of
filtered (dissolved) samples for metals, fluoride, and water quality parameters. Unfiltered samples will
be analyzed for cyanide, available cyanide, PAHs, SVOCs and PCBs. Consistent with the analyses of pore
water in sediment, the freely dissolved fraction is a better indicator of potential bioavailability and
toxicity of COPECs in surface water. Surface water analyses will also include the analysis of available
cyanide, which is more representative of the bioavailable and toxic form of cyanide. Water quality
parameters are known to influence the bioavailability, and thus toxicity, of various dissolved ionic
species including fluoride. Hardness, alkalinity, and major anions and cations will therefore be analyzed
in surface water and porewater to better understand fluoride bioavailability in aquatic exposure areas.
The bioavailability and toxicity of COPECs within aquatic exposure areas, and the associated ecological
risk, will be evaluated in the BERA based on multiple lines of evidence using a tiered approach for each
ecological receptor category (Table 22). Tier I will address whether concentrations of Site-related
COPECs in sediment, surface water, or pore water exceed the effects thresholds for survival, growth, or
reproduction for relevant ecological receptors. Tier II will consist of a sediment quality triad (SQT)
assessment for assessing risk to benthic invertebrate communities and chronic toxicity testing for
assessing risk to water-column invertebrate communities (Table 22). The tiered approach includes the
following components:
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• Tier I – Assessment of COPEC bioavailability based on bulk sediment, surface water, or pore
water analysis
• Tier II – Assessment of COPEC bioavailability using the SQT approach and/or surface water
chronic toxicity testing.
Tier I analyses of COPEC bioavailability will be conducted on additional sediment, surface water, and
pore water data collected during the BERA Investigation as part of a weight-of-evidence evaluation of
exposure. Site-specific COPEC concentrations in each of these environmental compartments will be
compared to NOEC and LOEC endpoints for survival, growth, or reproduction for relevant receptors to
understand whether concentrations present in Site exposure areas have the potential to cause
unacceptable ecological risk. Specific Tier I measurement endpoints, grouped by receptor category, are
provided in Table 22.
Tier II analyses will be conducted as part of the BERA Investigation in aquatic exposure areas where Tier
I analyses indicate the potential for adverse ecological effects based on Site-specific COPEC
concentrations in surface water, sediment, and/or pore water. Tier II analyses will consist of Site-specific
studies to directly measure the bioavailability and potential toxicity of COPECs in sediment. Pending the
outcome of Tier I analyses, the SQT will be evaluated as a Site-specific approach to assess potential risk
to benthic invertebrate communities in aquatic exposure areas where bulk sediment and pore water
analyses indicate COPEC bioavailability and toxicity in Tier I analyses. The SQT approach is a weight-of-
evidence evaluation of bioavailability and toxicity based on the following lines of evidence (Chapman et
al., 1987):
• Benthic community analyses: In situ evaluations of potential differences in benthic
macroinvertebrate community structure
• Sediment toxicity testing: Ex situ evaluations of sediment toxicity to freshwater invertebrate test
organisms in long-term sediment toxicity tests
• Chemical analyses: Comparisons of measured COPEC concentrations in sediment and pore
water to literature-derived benchmarks for sediment and aqueous exposures, respectively
In addition to the SQT evaluation of potential benthic invertebrate impacts, the analysis of biological
tissues will be evaluated if Tier II analyses indicate that COPECs are bioavailable in sediment and pore
water. Tissue analyses provide an indication of potential exposure based on comparisons to critical body
residues (CBRs) and may also be considered in evaluating COPEC concentrations in prey items as a
component of wildlife ingestion pathways.
4.2.2.2 Floodplain Upland Exposure Areas
The bioavailability of metals, cyanide, fluoride, PAHs, and PCBs in soils is complex and influenced
strongly by pH, cation exchange capacity, organic matter content, localized hydrology, and grain size.
Soil pH is considered the primary soil variable because it controls many soil biogeochemical processes
and has a significant influence on constituent bioavailability (USEPA, 2007b). Depending on COPEC
speciation, and whether it is complexed/sorbed to organic matter or clay, some portion of soil COPECs
may not be bioavailable because it does not readily dissolve in water or solubilize during passage
through organism intestines. The bioavailability and toxicity of COPECs in soils within terrestrial
exposure areas will be evaluated in the BERA using the measurement endpoints outlined by receptor
group, in Table 24.
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Initial screening to evaluate potential soil COPEC toxicity has been completed based on the available
data in the SLERA and COPEC refinement (Section 3.2). Similar analyses will be conducted on additional
data collected during the BERA Investigation as part of a weight-of-evidence evaluation of exposure.
These analyses include comparisons of total COPEC concentrations to ESVs, as well as NOECs and LOECs
for survival, growth, and reproductive endpoints for soil/litter invertebrate receptors and terrestrial
plant receptors (Table 24). This analysis will also include the identification of important soil
physicochemical parameters that help inform soil COPEC bioavailability, particularly, soil pH and soil
organic carbon content.
4.2.2.3 Floodplain Wetlands/Drainages Exposure Areas
The evaluation of the bioavailability and toxicity of COPECs in transitional exposure areas will consider
the approaches presented in the preceding sections for aquatic and terrestrial exposure areas and is
outlined in Table 23. The approach for transitional exposure areas will be developed based on localized
exposure conditions indicating the likelihood of occurrence of aquatic or terrestrial receptors. The scope
of Tier II analyses for transitional exposure areas will be determined, if necessary, following the
completion of Tier I assessments.
4.2.3 Background Characterization
The adequacy of data collected to represent background conditions, particularly in soils, was identified
as a data gap from the SLERA. As discussed in Section 4.1, additional background data will be collected
as part of the BERA Investigation to characterize COPEC concentrations representative of background
conditions and to permit comparison of exposure point concentrations from exposure areas to
background exposure point concentrations as part of a multiple lines of evidence approach. Collection of
a sufficient number of background samples will be necessary to support robust statistical evaluations to
retain or eliminate COPECs from further evaluation and to establish conservative reliable estimates of
background exposure point concentrations. The background characterization will entail collection of soil,
surface water, pore water, and sediment samples from the Upgradient Background Study Area (Figure
4-1). To facilitate the background characterization process, 20 soil locations will be sampled based on a
pseudo-random sampling design in the Upgradient Background Study Area west of the Site and adjacent
to Little Mountain Creek (Figure 4-2). Background soil sample locations will target representative soil
types for Floodplain Forest soils for comparison to the Upgradient Background Study Area soil
concentrations (Table 25). These locations will provide sufficient concentration data for the calculation
of statistically robust and conservative estimates of background exposure point concentrations including
UCLmean values and background threshold values. The background soil sample analysis will be used as
one line of evidence to evaluate the extent and magnitude of on-site soil COPECs.
Surface water, pore water, and sediment will be collected from Little Mountain Creek at two locations
upgradient of the ABL BERA Study Area (Figure 4-1). The sampling locations will target areas
hydraulically upgradient of the Site. Background exposure point concentrations in the upgradient
aquatic environment will be used as one line of evidence to evaluate the extent, magnitude, and
potential sources of aqueous COPECs within the ABL BERA Study Area.
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Figure 4-2 Proposed Background Soil Sample Locations
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4.2.4 Proposed Timeline and Contingencies
A summary of the supplemental BERA investigation sampling program is provided in Table 4-1. The
order and timing of each component of the investigation is intended to optimize the quality of
information collected in order to inform each subsequent component. The program is comprised of a
Site reconnaissance, Tier I assessments, and Tier II assessments. The proposed timeline, along with a
description of how the design of each sampling campaign will be contingent on the data collected in
earlier sampling campaigns is provided is the sections below.
4.2.4.1 Site Reconnaissance
Site reconnaissance is proposed to occur in winter 2023 and will include a forward-looking infrared
(FLIR) survey to identify areas of groundwater infiltration to Little Mountain Creek, a fine-grained
depositional sediment survey to confirm the suitability of proposed sediment sampling stations, and a
presence/absence study to understand if aquatic receptors are present in the floodplain ditch features
(Table 4-1).
Winter is the ideal time to conduct a FLIR survey at the Site due to the relatively warm groundwater that
is characteristic of the southeastern region of the United States. Relatively cool surface waters in winter
months will provide the maximum thermal contrast between groundwater and surface water, resulting
in ideal conditions to detect areas of preferential groundwater flow into Little Mountain Creek.
Identification of areas where groundwater-surface water interactions are occurring will help to inform
the final locations of sampling stations for surface and pore water to provide the most conservative
estimate of exposure conditions in Little Mountain Creek.
A second objective of the February Site reconnaissance will be to identify areas within Little Mountain
Creek where fine-grained depositional sediments are accruing. This information will be used to finalize
proposed sediment sampling station locations in order to ensure that samples are being collected from
areas that provide habitat to benthic organisms and to provide the most conservative estimate of
exposure conditions.
A presence/absence study for aquatic organisms in the transitional habitat ditch features will also be
conducted during the February Site reconnaissance campaign in order to determine if ecological
exposure is occurring in these features and if sampling stations should be added to characterize
potential exposure conditions.
4.2.4.2 Tier I Assessment
The Tier I assessment is proposed to occur in spring and summer 2023 and will include bulk surficial soil
sampling, bulk surficial sediment sampling, and sampling of surface water, pore water, and groundwater
(Table 4-1). Following the review of information collected during the Site reconnaissance campaign and
corresponding updates to proposed surface water, pore water and sediment sampling programs based
on Site-specific conditions, Tier I sampling will commence. Sampling of solid matrices (soils and
sediments) will take place during a single event in spring 2023 to address identified data gaps and refine
exposure estimates for terrestrial and semi-aquatic receptors. Sampling of aqueous matrices (surface
water, pore water, and groundwater) will be conducted once in spring 2023, following the soil and
sediment sampling and again in summer 2023. To the extent practicable, the summer event will be
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sequenced to correspond to a high flow event linked to summer storms that are common in the region
to capture a range of hydrologic conditions. Data collected during these campaigns will be reviewed to
determine if additional sampling of surface water, pore water, or groundwater is required. A technical
memorandum will be prepared and submitted to NCDEQ following collection of the spring and summer
data to report the findings of the Tier I assessment.
4.2.4.3 Tier II Assessments
If warranted, a Tier II investigation will be implemented to address data gaps in the site-specific
exposure conditions, if identified (e.g., dietary exposure and/or direct contact toxicity through a
sediment quality triad approach). The decision to proceed with the Tier II assessment will be reviewed
with NCDEQ along with the scope of work to ensure that information obtained is focused on BERA
constituents that are most likely to be driving risk. Tier II assessments will be targeted for the fall 2023
time period during low water conditions. Sediment quality triad (SQT) sampling may be conducted at
stations in Little Mountain Creek if bulk sediment and pore water analyses indicate COPEC bioavailability
and toxicity in Tier I analyses. Surface water toxicity testing may also be conducted in aquatic exposure
areas where surface water analyses indicate COPEC bioavailability and toxicity in Tier I analyses. If Tier I
analyses do not indicate COPEC bioavailability and toxicity Tier II assessments will not be performed.
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5 BERA Risk Analysis Plan
Risk estimates will be developed in the BERA using data and observational information generated as part
of the ABL SLERA and data collected as part of the proposed supplemental BERA investigation described
in Section 4. Risk estimates will be based on quantitative comparisons of exposure point concentrations
to effects endpoints established based on the refined ecological effects analysis discussed in the
following section.
5.1 Effects Analysis
As part of the risk analysis phase, the preliminary ecotoxicity review presented in the BERA Problem
Formulation (Section 3.3.1) will be refined based on more detailed literature reviews of the potential
ecotoxicological effects of primary COPECs and/or the analysis and interpretation of Site-specific data to
evaluate potential exposure-response relationships observed in exposure areas at the Site. The
following sections describe general procedures for conducing the effect analysis phase of the BERA.
5.1.1 Direct Contact Exposure Pathways
The effects analysis for direct contact pathways will be conducted based on literature/guidance reviews
to refine direct contact ESVs to better represent Site-specific conditions. Site-specific studies may also
be conducted as part of the BERA to measure potential effects of receptors exposed to Site-specific
media in a laboratory or in situ conditions within exposure areas (Section 4.2; Table 22). The results of
these Site-specific studies, if conducted, will be used to support a Site-specific effects analysis for
relevant exposure pathways. Based on the availability of data, two general tiers of endpoints will be
derived to evaluate the potential for adverse effects related to direct contact exposure pathways:
• NOEC: Representative of the central tendency (e.g., geometric mean) of NOEC endpoints
identified for relevant test organisms in literature/database studies.
• LOEC: Representative of the low end of the distribution of LOEC endpoints (e.g., 15th percentile
or bounded study endpoints) identified for relevant test organisms in literature/database
studies.
The calculation of endpoints for specific COPECs and receptor groups will be dependent on the
availability and relevance of ecotoxicity data. When available, existing estimates of NOECs/NOAELs
derived in the literature or guidance based on the geometric mean of no effect endpoints will be used in
the BERA. If insufficient data are available or it is not warranted to derive a geometric mean-based
NOEC/NOAEL, established NOECs/NOAELs from literature or guidance will be proposed. The basis for
the derivation of endpoints for direct contact pathways will be presented in the effects analysis section
of the BERA Report. The following sections describe the general approach for conducting effects
analyses for direct contact exposure pathways from relevant exposure media.
5.1.1.1 Soil
Potential effects associated with direct contact pathways from soils will be evaluated based on
literature/database reviews of NOEC and LOEC endpoints from toxicological studies. Effects endpoints
will be established for the receptor categories identified for direct contact pathways to soil in the
floodplain and measurement endpoints for soil (Table 24):
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• Terrestrial plant community
• Soil invertebrate community
Potential sources of toxicological data that will be used to support the development of direct contact
NOEC and LOEC endpoints for soil COPECs include:
• USEPA Eco-SSLs
• Oak Ridge National Laboratory (ORNL) Risk Assessment Information System (RAIS)
• Los Alamos National Laboratory (LANL) ECORISK Database
• USEPA ECOTOX Database
• Targeted literature reviews for specific COPECs and receptor categories
Where applicable, effects endpoints that consider site-specific conditions that influence COPEC
bioavailability and toxicity in soil will be prioritized in the effects analyses. Considerations of site-specific
conditions affecting COPEC bioavailability in soil that were identified in the BERA problem formulation
(see Section 3.1) and conceptual investigation approach (see Section 4.2) include, but are not limited to:
• Soil pH: Influences the bioavailability and toxicity of aluminum in terrestrial soils.
• Organic carbon: Influences the partitioning and bioavailability of metals and organic COPECs in
soil.
The basis for the derivation of endpoints for direct contact pathways to soil will be presented in the
effects analysis section of the BERA Report.
5.1.1.2 Surface Water
Potential effects associated with direct contact pathways from surface water will be evaluated based on
literature/database reviews of survival, growth, and reproduction endpoints from aqueous toxicity
studies. In the absence of other data, chronic surface water quality criteria for the protection of aquatic
life promulgated by the USEPA National Recommended Water Quality Criteria (NRWQC), 15A NCAC 02B
Water Quality Standards for Surface Water, NCDEQ In-Stream Target Values for Surface Water, or
USEPA Region 4 Chronic Freshwater Screening Levels will be considered default NOECs for the
protection of aquatic receptors that may be exposed to surface water in Little Mountain Creek or
Floodplain Wetland exposure areas at the Site.
As available, receptor-specific surface water NOEC and LOEC endpoints will be derived from a review of
aqueous toxicity studies/databases for relevant test organisms to support the evaluation of
measurement endpoints (Table 22). Potential sources of aqueous toxicity studies to support the
derivation of receptor-specific surface water benchmarks include:
• USEPA ECOTOX Database
• LANL ECORISK Database
• ORNL RAIS
• Targeted literature reviews for specific COPECs and receptor categories
Where applicable, effects endpoints that consider Site-specific conditions that may influence COPEC
bioavailability and toxicity in surface water will be preferentially selected. Chronic surface water quality
criteria for many metals are based on exposure to the dissolved phase and are a function of surface
water hardness (as mg/L CaCO3). For these hardness-dependent metals, effects endpoints will be based
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on sample-specific hardness measurements that are spatially and temporally aligned with filtered
(dissolved) metals results. For copper, NOEC concentrations will be based on the biotic ligand model,
consistent with USEPA NRWQC. In addition, USEPA aquatic life ambient water quality criteria for
aluminum that considers the influence of hardness, dissolved organic carbon, and pH on aluminum
toxicity will be evaluated in the BERA (USEPA, 2018). Other site-specific conditions that may affect
COPEC bioavailability in surface water that will be considered in the development of effects endpoints
include:
• Surface water pH: Influences the bioavailability and toxicity of cyanide, aluminum, and other
metals.
• Available cyanide: Represents the bioavailable and potentially toxic form of cyanide.
As discussed in Section 3.2.1 and Section 3.3.1.2, the current 15A NCAC 02B Water Quality Standard for
fluoride is based on a single acute toxicity test measured in the late 1970s multiplied by an assessment
factor. The aquatic fluoride ESV does not align with the current state of the science of fluoride
ecotoxicity that account for TMFs and other Site-specific considerations. The available ecotoxicity
literature support a chronic fluoride limit of 4.0 mg/L and Site-specific data indicate that fluoride effects
may occur at a concentration greater than 4.0 mg/L (Appendix D). Therefore, the derivation of Site-
specific fluoride limits in the evaluation of the BERA may be warranted. Establishing new revised
screening values for fluoride would align the risk assessment process with the current state of the
science.
The basis for the derivation of endpoints for direct contact pathways to surface water will be presented
in the effects analysis section of the BERA Report. It is anticipated that the availability of aqueous
toxicity data from these sources may vary considerably based on COPEC and receptor category. For
example, aqueous toxicity data for direct contact exposure pathways to aquatic plants, amphibians, and
reptiles are generally lacking for several COPECs. Surface water exposure pathways for COPECs and
receptor categories lacking available aqueous toxicity endpoints will be addressed as an uncertainty in
the BERA Report.
5.1.1.3 Sediment
If suitable depositional sediment exists within Little Mountain Creek, potential effects associated with
direct contact pathways from sediment to benthic invertebrates for organic constituents will be
evaluated based on predictive models derived using equilibrium partitioning (EqP) relationships. The
approach for deriving equilibrium partitioning sediment benchmarks (ESBs) will be based on USEPA ESB
guidance for multiple constituent groups relevant to sediment exposure in aquatic and transitional
exposure areas at the Site:
• PAHs: USEPA Procedures for the Derivation of Equilibrium Partitioning Sediment Benchmarks
(ESBs) for the Protection of Benthic Organisms: PAH Mixtures (USEPA, 2003)
• Nonionic Organic Compounds: Procedures for the Derivation of Equilibrium Partitioning
Sediment Benchmarks (ESBs) for the Protection of Benthic Organisms: Compendium of Tier 2
Values for Nonionic Organics (USEPA, 2008b)
In the absence of appropriate EqP relationships to derive Site-specific ESBs for COPECs,
literature/database reviews will be conducted to identify NOEC and LOEC endpoints from toxicological
studies. Potential sources of toxicological data that will be used to support the development of direct
contact NOEC and LOEC endpoints for sediment COPECs include, but are not limited to:
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• NOAA Sediment Toxicity (SEDTOX) Database
• ORNL RAIS
• LANL ECORISK Database
• Targeted literature reviews for specific COPECs
The basis for the derivation of endpoints for direct contact pathways to sediment will be presented in
the effects analysis section of the BERA Report.
5.1.1.4 Pore Water
Potential effects associated with direct contact pathways to pore water will be evaluated based on
literature/database reviews of survival, growth, and reproduction endpoints from aqueous toxicity
studies. When available, pore water NOEC and LOEC benchmarks will be derived for each receptor
category that may be exposed to pore water in the ECSM (wetland plants, benthic invertebrates,
amphibians) using aqueous toxicity endpoints for test organisms representing each receptor category.
Sources of aqueous toxicity data will include sources identified for surface water (Section 5.1.1.2), but
will also include aqueous toxicity benchmarks presented in the ESB guidance for sediment (Section
5.1.1.3). Water quality benchmarks are protective of benthic invertebrates in the derivation of ESBs;
therefore, the water quality benchmarks are considered appropriate for direct comparisons to pore
water to evaluate potential effects to benthic invertebrates. Water quality benchmarks derived for the
protection of general aquatic life are considered protective of all receptor categories that may be
exposed to pore water.
Consistent with the derivation of surface water effect endpoints, the derivation of pore water effects
endpoints will consider Site-specific conditions that influence COPEC bioavailability and toxicity. Site-
specific conditions in pore water that will be considered in the development of effects endpoints
include, but are not limited to:
• Pore water pH: Influences the bioavailability and toxicity of cyanide, aluminum, and other
metals.
• Pore water hardness: Criteria for the dissolved phase of select metals is a function of pore water
hardness (as CaCO3).
• Available cyanide: Represents the bioavailable and potentially toxic species of cyanide.
• Fluoride: Refined ESVs for fluoride will be considered that consider TMFs.
In the absence of available aqueous toxicity endpoints for specific receptor categories or the necessary
information to derive reliable Site-specific criteria, chronic surface water quality criteria for the
protection of aquatic life obtained from the following sources will be considered default NOECs for the
protection of receptors that may be exposed to pore water:
• USEPA NRWQC
• 15A NCAC 02B Water Quality Standards for Surface Water
• NCDEQ In-Stream Target Values for Surface Water
• USEPA Region 4 Chronic Freshwater Screening Levels
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5.1.2 Wildlife Ingestion Exposure Pathways
For wildlife ingestion pathways, the effects analysis will include a detailed review of TRVs derived from
toxicological studies to evaluate the potential for adverse ecological effects associated with the dietary
doses. Two tiers of chronic TRVs representing NOAELs and LOAELs for growth, reproduction, and
survival endpoints will be identified to evaluate the potential for adverse effects via wildlife ingestion
pathways:
• Low TRV (TRVLow): Represents the geometric mean NOAEL TRV identified in literature studies.
• High TRV (TRVHigh): Represents a TRV based on chronic exposure, that estimates a potential
threshold dose between NOAEL and LOAEL in literature studies.
The two tiers of TRVs will be used to evaluate potential wildlife exposure based on average daily doses
(ADDs) calculated using screening-level and refined exposure assumptions (Section 5.3). TRVs will be
obtained primarily from peer-reviewed compilations of toxicity data for ecological risk assessment from
sources including, but not limited to:
• USEPA Eco-SSLs
• ORNL Toxicological Benchmarks for Wildlife: 1996 Revision (Sample et al., 1996)
• LANL ECORISK Database
• Targeted literature reviews for specific COPECs and receptor categories
The basis for deriving TRVs from literature/database searches will be presented in the effects analysis
section of the BERA Report.
5.2 Exposure Analysis
Risk estimates will be developed in the BERA using data and observational information generated as part
of the ABL SLERA and data collected as part of the proposed supplemental BERA investigation described
in Section 4. Risk estimates for direct contact exposure pathways will be based on quantitative
comparisons of exposure point concentrations to effects thresholds established based on the refined
ecological effects analysis discussed in Section 5.1. Risk estimates for wildlife ingestion exposure
pathways will be based on quantitative comparisons of ADDs modeled based on exposure point
concentrations (Section 5.2.3) to effects thresholds established based on the refined ecological effects
analysis discussed in the preceding section.
In the BERA, exposure point concentrations will be calculated to represent likely exposure scenarios, in
addition to the maximum exposure scenarios evaluated in the conservative SLERA. Exposure point
concentrations for risk estimation via direct contact and wildlife ingestion pathways will be calculated
based on UCLmean COPEC concentrations to represent a conservative estimate of average exposure
conditions over an exposure area.
5.2.1 Calculation of Exposure Point Concentrations
Exposure point concentrations to evaluate exposure in the BERA will be estimated for each exposure
area using data collected as part of the ABL SLERA and supplemental BERA investigation. Exposure point
concentrations will be calculated to represent a range of exposure scenarios:
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• Maximum exposure point concentration: Represent a reasonable maximum exposure scenario
based on the maximum measured concentration in each exposure area.
• Refined exposure point concentration: Represent likely exposure scenarios based on random
exposure throughout each exposure area.
Refined exposure point concentrations for risk estimation via direct contact and wildlife ingestion
pathways will be calculated based on UCLmean COPEC concentrations to represent average exposure
conditions over an exposure area. UCLmean concentrations will be calculated using USEPA ProUCL
software (version 5.2 or later) and the statistical approach will be consistent with USEPA ProUCL Version
5.2 Technical Guidance (USEPA, 2022). In general, the UCLmean calculation recommended in ProUCL will
be used as the refined exposure point concentration in the risk estimate. The rationale for any
deviations from the ProUCL-recommended UCLmean calculation will be documented in the BERA Report.
5.2.2 Direct Contact Exposure Pathways
Direct contact pathways identified in the ECSM will be evaluated based on comparisons of exposure
point concentrations to receptor-specific effects endpoints. As stated in Section 5.2.1, direct contact
exposure evaluations will include a range of exposure conditions based on maximum exposure point
concentration and refined exposure point concentration scenarios. Maximum and refined exposure
point concentrations will be compared to NOEC and LOEC endpoints to evaluate the potential for
adverse effects based on a range of effects endpoints.
5.2.3 Wildlife Ingestion Pathways
The evaluation of potential exposure via direct and incidental ingestion pathways for wildlife will be
conducted based on a tiered approach in accordance with the USEPA guidance for conducting
probabilistic ecological risk assessment (2001b). The tiered approach will include the following ingestion
models to quantitatively assess potential risks to representative wildlife receptors:
• Deterministic exposure modeling: Based on conventional single point estimates of exposure
point concentrations and typical exposure parameters.
• Probabilistic exposure modeling: If estimated doses based on deterministic modeling exceed
doses associated with LOAELs, probabilistic models may be developed to estimate exposure
based on the distributions of exposure point concentrations and exposure parameters to
account for variability or uncertainty in model parameters.
5.2.3.1 Model Structure
Dietary exposure estimates consider the typical dietary preference and composition for each receptor,
in terms of representative dietary items at the site. Exposure estimates for wildlife ingestion pathways
will be based on comparisons of receptor-specific ADDs calculated from simple dose rate models to
TRVs. As previously stated, the modeling approach will be tiered, with an initial deterministic model
supplemented by a probabilistic model, as warranted. The general form of the dose rate model used to
calculate ADDs in both modeling scenarios is as follows:
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𝐴𝐴𝐴𝐴𝐴𝐴=1𝐵𝐵𝐵𝐵��𝐹𝐹𝐹𝐹𝐹𝐹𝑑𝑑𝑑𝑑× ��𝑓𝑓𝑗𝑗× 𝐶𝐶𝑗𝑗�𝑀𝑀
𝑗𝑗=1 +𝑆𝑆𝐹𝐹𝐹𝐹× 𝐶𝐶𝑠𝑠𝑠𝑠𝑠𝑠+𝐵𝐵𝐹𝐹𝐹𝐹× 𝐶𝐶𝑠𝑠𝑑𝑑�𝑖𝑖× 𝐴𝐴𝐴𝐴𝐹𝐹𝑖𝑖𝑁𝑁
𝑖𝑖=1
where:
i = Number of exposure areas
j = Receptor-specific dietary items
BW = Receptor-specific body weight
FIRdw = Receptor-specific daily food ingestion rate (dry weight)
fj = Proportion of dietary item j to total dietary composition
Cj = COPEC concentration in dietary item j
SIR = Receptor-specific incidental sediment ingestion rate
Csub = COPEC concentration in substrate (sediment or soil)
WIR = Receptor-specific daily drinking-water ingestion rate
Csw = COPEC concentration in unfiltered surface water
AUFi = Area use factor
The direct ingestion of surface water is included in the dietary exposure model for completeness.
However, the inclusion of the drinking water dose in the wildlife ingestion model is not likely to
materially contribute to the total ADD, as surface water ingestion typically represents a negligible
contribution to the total dose relative to the direct ingestion of biota and the incidental ingestion of
sediment.
As discussed in Section 5.2.1, preliminary exposure point concentrations for soil, sediment, or surface
water inputs into dose rate models will be based on the maximum measured concentration in each
exposure medium to represent the most conservative exposure scenario. Refined exposure point
concentrations will include a conservative estimate of the central tendency of exposure (e.g., UCLmean
concentration) to reflect the average dose that a receptor may experience while foraging randomly
within an exposure area.
The underlying algorithm is consistent for deterministic and probabilistic exposure models. However,
deterministic estimates use single, discrete values for model parameters (i.e., representative of a typical
or a worst case), whereas probabilistic estimates use a distribution of values for model parameters to
account for the inherent variability or uncertainty in the estimation of those parameters. Procedures for
calculating probabilistic exposure estimates are consistent with USEPA (2001b) guidance on probabilistic
ecological risk assessments and USEPA (1997b) guidance on Monte Carlo analyses.
5.2.3.2 Model Parameters
Dietary exposure models include parameters relating to receptor-specific exposure factors, exposure
point concentrations, and area use factors (AUFs). Exposure factors refer to receptor-specific variables
(e.g., BW, FIRfw, SIR, WIR, etc.), which are typically derived from literature sources. Exposure variables
refer to Site-specific measurements, namely COPEC concentrations estimated in exposure media. The
approach for estimating exposure factors and variables for wildlife ingestion pathways is summarized as
follows. The BERA Report will also include an appendix that provides model calculations and specific
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details regarding exposure assumptions and parameters included in the estimation of the ADD for each
exposure scenario.
The USEPA Wildlife Exposure Factors Handbook [“the Handbook” (USEPA, 1993)] will be the primary
data source of exposure factors for the wildlife receptor species used to represent the receptor
categories identified in the ECSM (Section 3.1.2). Additional receptor-specific literature sources will also
supplement exposure data compiled in the Handbook (e.g., USACHPPM, 2004). Deterministic exposure
modeling uses exposure factors that are representative of typical or average (e.g., mean parameter)
exposure conditions. Probabilistic exposure modeling evaluates a range of potential exposure factors to
capture the individual- and population-level variation in exposure factors that are likely to occur within
the entire exposure area. Table 27 presents a summary of the approach, including key literature
sources, for identifying exposure parameters for deterministic and probabilistic dose rate models.
Based on the conceptual study design, dietary pathways will be evaluated based on the estimates of
COPEC bioaccumulation into dietary items from soil, sediment, or surface water pathways.
Concentrations of COPECs in dietary items will be estimated using conservative assumptions of
bioaccumulation factors from soil, biota-sediment accumulation factors from sediment, or
bioconcentration factors from surface water. Table 5-1 details the key literature/database sources for
estimating bioaccumulation in dietary items.
Table 5-1 Data Sources and Key Literature for Estimating Dietary Bioaccumulation
Exposure Medium Dietary Item Bioaccumulation Relationship
Soil Plants Eco-SSL Guidance (USEPA, 2005b)
ORNL Guidance (Bechtel Jacobs, 1998)
Baes et al. (1984)
LANL ECORISK Database
Invertebrates Eco-SSL (USEPA, 2005b)
ORNL Guidance (Sample et al., 1998a)
LANL ECORISK Database
Small mammals Eco-SSL (USEPA, 2005b)
LANL ECORISK Database
ORNL Guidance (Sample et al., 1998b)
Sediment Benthic invertebrates LANL ECORISK Database
United States Army Corp of Engineers ERED
Database
Fish LANL ECORISK Database
Song and Breslin (1993)
Surface Water Fish LANL ECORISK Database
Notes:
Eco-SSL = ecological soil screening level
LANL = Los Alamos National Laboratory
ORNL = Oak Ridge National Laboratory
USEPA = United States Environmental Protection Agency
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In addition to the compilation of bioaccumulation data from these key literature/database sources,
targeted literature searches will be conducted as needed for specific exposure medium-dietary item
relationships. An interim BERA Work Plan deliverable will be submitted that summarizes the
bioaccumulation models that will be used to support dietary modeling in the BERA. The BERA Report will
also include an appendix that provides the basis for bioaccumulation relationships used in dietary
exposure modeling.
5.2.3.3 Toxicity Reference Values
TRVs will be derived to evaluate the potential for adverse ecological effects associated with the dietary
doses estimated using the approaches described in the preceding sections. As stated in Section 5.1.2,
two tiers of chronic TRVs representing NOAELs and LOAELs for growth, reproduction, and survival
endpoints will be identified to evaluate the potential for adverse effects via ingestion pathways:
• Low TRV (TRVLow): Represents the geometric mean NOAEL TRV identified in literature studies
• High TRV (TRVHigh): Represents a TRV based on chronic exposure, that estimates a potential
threshold between NOAEL and LOAEL in literature studies
The two tiers of TRVs will be used to evaluate potential wildlife exposure based on ADDs calculated
using screening-level and refined exposure assumptions. TRVs will be obtained primarily from peer-
reviewed compilations of toxicity data for ecological risk assessment (e.g., USEPA, 2005b; Sample et al.,
1996). For constituents lacking toxicity data from these compilations, literature sources will be reviewed
to identify appropriate low and high TRVs. The BERA Report will also include an appendix that
documents the basis for deriving TRVs.
5.3 Risk Calculation
Potential risk associated with exposure estimates presented in the BERA will be expressed as a hazard
quotient (HQ), calculated as the ratio of the exposure point concentration (EPC) to ESV for direct contact
pathway and the ADD to the TRV for ingestion pathways: 𝐻𝐻𝐻𝐻= 𝐸𝐸𝐸𝐸𝐶𝐶𝐸𝐸𝑆𝑆𝐸𝐸 𝑜𝑜𝑜𝑜 𝐴𝐴𝐴𝐴𝐴𝐴𝑇𝑇𝐹𝐹𝐸𝐸
Ecological risk will be characterized based on HQs for each exposure pathway, as follows:
• HQsNOEC/NOAEL less than or equal to 1.0 indicates limited potential for adverse effects because
constituent exposure point concentrations or modeled ADD results in an exposure that has been
demonstrated to not cause adverse ecological effects.
• HQsNOEC/NOAEL greater than 1.0 indicates that an exposure point concentration or modeled ADD
for the constituent exceeds an ecological benchmark representing a NOEC or NOAEL. The
exposure may or may not constitute an actual risk; however, the potential for adverse effects
cannot be dismissed and further evaluation is warranted.
HQs calculated based on LOEC ESVs or TRVHigh will be used to assess the likelihood of adverse effects
based on exposure to concentrations or doses known to be associated with an adverse effect on
survival, growth, or reproduction. These evaluations will be used to identify potential risk drivers within
receptor groups and exposure areas.
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5.4 Uncertainty Analysis
A critical component of the BERA is the analysis of uncertainty that is inherent in the ERAGS process. A
thorough and, where possible, quantitative uncertainty analysis is necessary to understand how
potential uncertainty may influence risk estimates and associated risk characterization that may be used
to support risk management decision-making. Potential elements of uncertainty that will be addressed
in the analysis include:
• Adequacy, representativeness, and quality of sampling data
• Temporal (seasonal) variability in exposure
• Uncertainties associated with exposure pathways not quantified in the BERA
• Potential exposure to constituents not detected in BERA datasets
• Potential exposure to constituents lacking ecotoxicity data
• Confidence in ecological effects thresholds used in the risk estimation
• Potential synergistic or antagonistic toxicological effects associated with exposure to multiple
COPECs
• Appropriateness of assumptions included in dose rate models, including exposure parameters,
exposure point concentrations, and AUFs
• Variations in potential toxicological responses of individuals and populations of ecological
receptors
• Relative difference of in situ bioavailability compared to bioavailability in toxicological studies
• Uncertainty associated with the HQ approach to estimating risk
• Potential population- and community-level impacts of non-COPEC stressors
• Confidence in the available lines of evidence to support ecological risk conclusions
The analysis will assess the impact of these uncertainties on overall BERA conclusions and
recommendations.
5.5 Risk Characterization
Risk characterization in the BERA will focus on establishing causal relationships, if present, between
ecological effects and Site-specific exposure to COPECs. Risk characterization procedures in the BERA
will follow a similar framework to exposure estimation and risk calculations in the SLERA. However, the
BERA will include a more comprehensive exposure dataset and will focus on more site-specific
measurement endpoints that may require a greater level of sophistication of analyses (e.g., probabilistic
modeling) to support the evaluation of assessment endpoints.
A description of ecological risks will be documented in the BERA for exposure area and each assessment
endpoint based on the findings and interpretations of risk estimates from corresponding measurement
endpoints. The risk description provides a weight-of-evidence evaluation of the likelihood and ecological
significance of the estimated risks and may be used to support risk management decision-making
(USEPA, 1997a). Key elements included in the BERA risk description include:
• Identifying thresholds for ecological effects for observed exposure-response relationships
• Estimating the likelihood of adverse ecological effects
• Evaluating the spatial extent of unacceptable risk within exposure areas
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• Assessing the potential for identified risks to persist in the future, considering the potential for
natural recovery once the sources of COPECs or migration pathways to the exposure area are
mitigated
The output of the risk characterization process will provide the basis for the conclusions and
recommendations that will be presented in the BERA Report. These recommendations may be used in
risk management decision-making to determine the need, extent, and nature of potential remedial
actions to address unacceptable ecological risks.
5.6 BERA Summary and Conclusions
The findings of the BERA will be summarized to clearly identify the assessment procedures used, the
potential risks identified, the uncertainties associated with the conclusions. The BERA findings will be
evaluated for each ecological exposure area to support area-specific recommendations to guide risk
management decision-making for the Site.
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Baseline Ecological Risk Assessment Work Plan, Badin Business Park
Tables
EHS Support LLC
Tables
Table 1
Summary of Samples Considered by CEC in SLERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesGroundwater ABLWWF001 ABL-WW 8/1/2011 X
Groundwater WET WELL ABL-WW 8/30/2011 X
Groundwater ABLMW03F001 ABL-MW003 8/2/2011 X
Groundwater ABLMW04F001 ABL-MW004 8/1/2011 X
Groundwater ABLMW05F001 ABL-MW005 8/1/2011 X
Groundwater ABLPZ15F001 ABL-PZ15 8/3/2011 X
Groundwater ABLPZ16F001 ABL-PZ16 8/2/2011 X
Groundwater ABLPZ17F001 ABL-PZ17 8/2/2011 X
Groundwater ABLPZ18F001 ABL-PZ18 8/2/2011 X
Groundwater ABLPZ19F001 ABL-PZ19 8/3/2011 X
Groundwater ABLMW01F001 ABL-MW001 8/2/2011 X
Groundwater ABLMW02F001 ABL-MW002 8/1/2011 X
Groundwater ABLMW06F001 ABL-MW006 8/1/2011 X
Groundwater ABLMW03F002 ABL-MW003 11/15/2011 X X X
Groundwater ABLMW04D002 ABL-MW004 11/15/2011 X X X
Groundwater ABLMW04F002 ABL-MW004 11/15/2011 X X X
Groundwater ABLMW05F002 ABL-MW005 11/15/2011 X X X X X X X
Groundwater ABLPZ15F002 ABL-PZ15 11/15/2011 X X X
Groundwater ABLPZ16F002 ABL-PZ16 11/15/2011 X X X
Groundwater ABLPZ17DF002 ABL-PZ17 11/15/2011 X X X
Aug 2011 Sampling Program - Phase 3 Engineering Data Collection for the CMS (Environeering, 2012)
Matrix Type Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Nov 2011 Sampling Program - Phase 3 Engineering Data Collection for the CMS (Environeering, 2012)
1 of 9
Table 1
Summary of Samples Considered by CEC in SLERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Groundwater ABLPZ17F002 ABL-PZ17 11/15/2011 X X X
Groundwater ABLPZ18F002 ABL-PZ18 11/16/2011 X X X
Groundwater ABLPZ19F002 ABL-PZ19 11/15/2011 X X
Groundwater ABLPZ19F002 ABL-PZ19 11/21/2011 X
Groundwater ABLMW01F002 ABL-MW001 11/14/2011 X X X
Groundwater ABLMW02F002 ABL-MW002 11/15/2011 X X X
Groundwater ABLMW06F002 ABL-MW006 11/14/2011 X X X
Surface Water ABLSWL01F001 ABL-SWL01 11/18/2011 X X X X X
Groundwater ABLMW03F002 ABL-MW003 5/10/2012 X X X
Groundwater ABLMW04F002 ABL-MW004 5/10/2012 X X X
Groundwater ABLMW05F002 ABL-MW005 5/10/2012 X X X
Groundwater ABLPZ15F002 ABL-PZ15 5/9/2012 X X X
Groundwater ABLPZ16D002 ABL-PZ16 5/10/2012 X X X
Groundwater ABLPZ16F002 ABL-PZ16 5/10/2012 X X X
Groundwater ABLPZ17F002 ABL-PZ17 5/10/2012 X X X
Groundwater ABLPZ18F002 ABL-PZ18 5/9/2012 X X X
Groundwater ABLPZ19F002 ABL-PZ19 5/10/2012 X X
Groundwater ABLMW01D002 ABL-MW001 5/8/2012 X X X
Groundwater ABLMW01F002 ABL-MW001 5/8/2012 X X X
Groundwater ABLMW02F002 ABL-MW002 5/8/2012 X X X
Groundwater ABLMW06F002 ABL-MW006 5/8/2012 X X X
May 2012 Sampling Program - Phase 3 Engineering Data Collection for the CMS (Environeering, 2012)
2 of 9
Table 1
Summary of Samples Considered by CEC in SLERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Groundwater ABLMW3D003 ABL-MW003 7/31/2012 X X X
Groundwater ABLMW3F003 ABL-MW003 7/31/2012 X X X
Groundwater ABLMW4F003 ABL-MW004 7/31/2012 X X X
Groundwater ABLMW5F003 ABL-MW005 7/31/2012 X X X
Groundwater ABLMW02F003 ABL-MW002 7/30/2012 X X X
Groundwater ABLMW06F003 ABL-MW006 7/30/2012 X X X
Groundwater ABLPZ15F003 ABL-PZ15 8/3/2012 X X X
Groundwater ABLPZ16D003 ABL-PZ16 8/3/2012 X X X
Groundwater ABLPZ16F003 ABL-PZ16 8/3/2012 X X X
Groundwater ABLPZ17F003 ABL-PZ17 8/3/2012 X X X
Groundwater ABLPZ18F003 ABL-PZ18 8/3/2012 X X X
Groundwater ABLMW1F003 ABL-MW001 8/3/2012 X X X
Sediment ABL-SD006-F004 ABL-SD006 7/21/2015 X X X X X X X X
Sediment ABL-SD001-F004 ABL-SD001 7/21/2015 X X X X X X X X
Sediment ABL-SD002-F004 ABL-SD002 7/21/2015 X X X X X X X X
Sediment ABL-SD003-F004 ABL-SD003 7/21/2015 X X X X X X X X
Sediment ABL-SD004-F004 ABL-SD004 7/21/2015 X X X X X X X X
Sediment ABL-SD005-D004 ABL-SD005 7/21/2015 X X X X X X X X
Sediment ABL-SD005-F004 ABL-SD005 7/21/2015 X X X X X X X X
Surface Water ABL-ML003-F004 ABL-ML003 7/21/2015 X X X X X X
Jul/Aug 2012 Sampling Program - Phase 3 Engineering Data Collection for the CMS (Environeering, 2012)
Jul 2015 Sampling Program - ABL and Former Ball Field Sampling Activities (Environeering, 2015)
3 of 9
Table 1
Summary of Samples Considered by CEC in SLERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Surface Water ABL-SW006-D004 ABL-SW006 7/21/2015 X X X X X X X
Surface Water ABL-SW006-F004 ABL-SW006 7/21/2015 X X X X X X X
Surface Water ABL-SW001-F004 ABL-SW001 7/21/2015 X X X X X X X
Surface Water ABL-SW002-F004 ABL-SW002 7/21/2015 X X X X X X X
Surface Water ABL-SW003-F004 ABL-SW003 7/21/2015 X X X X X X X
Surface Water ABL-SW004-F004 ABL-SW004 7/21/2015 X X X X X X X
Surface Water ABL-ML002-F004 ABL-ML002 7/21/2015 X X X X X X
Surface Water ABL-ML001-F004 ABL-ML001 7/21/2015 X X X X X X
Groundwater ABL-WW001 ABL-WW001 5/11/2018 X
Sediment ABL-SD010-F005 ABL-SD010 7/11/2018 X X X X X
Sediment ABL-SD011-F005 ABL-SD011 7/11/2018 X X X X X
Sediment ABL-SD012-F005 ABL-SD012 7/11/2018 X X X X X
Sediment ABL-SD007-D005 ABL-SD007 7/12/2018 X X X X X
Sediment ABL-SD007-F005 ABL-SD007 7/12/2018 X X X X X
Sediment ABL-SD008-F005 ABL-SD008 7/12/2018 X X X X X
Groundwater ABL-MW003-F005 ABL-MW003 7/11/2018 X X
Groundwater ABL-MW004-F005 ABL-MW004 7/11/2018 X X
Groundwater ABL-MW005-D005 ABL-MW005 7/11/2018 X X
Groundwater ABL-MW005-F005 ABL-MW005 7/11/2018 X X
Groundwater ABL-MW001-F005 ABL-MW001 7/10/2018 X X
May 2018 Sampling Program
Jul 2018 Sampling Program - Investigative Report for the Little Mountain Creek Area (Environeering, 2018)
4 of 9
Table 1
Summary of Samples Considered by CEC in SLERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Groundwater ABL-MW002-F005 ABL-MW002 7/10/2018 X X
Groundwater ABL-MW006-F005 ABL-MW006 7/10/2018 X X
Groundwater ABL-MW006-F005-2 ABL-MW006 7/10/2018 X
Surface Water ABL-SW013-F005 ABL-SW013 7/11/2018 X X X X X X
Surface Water ABL-SW014-F005 ABL-SW014 7/11/2018 X X X X X X
Surface Water ABL-SW015-F005 ABL-SW015 7/11/2018 X X X X X X
Surface Water ABL-SW008-D005 ABL-SW008 7/12/2018 X X X X X X X X X X
Surface Water ABL-SW008-F005 ABL-SW008 7/12/2018 X X X X X X X X X X
Surface Water ABL-SW009-F005 ABL-SW009 7/12/2018 X X X X X X
Surface Water ABL-SW010-F005 ABL-SW010 7/12/2018 X X X X X X
Surface Water ABL-SW011-F005 ABL-SW011 7/12/2018 X X X X X X
Surface Water ABL-SW012-F005 ABL-SW012 7/12/2018 X X X X X X X X X X
Groundwater ABL-MW003-F006 ABL-MW003 10/30/2018 X X
Groundwater ABL-MW004-F006 ABL-MW004 10/30/2018 X X
Groundwater ABL-MW005-D006 ABL-MW005 10/30/2018 X X
Groundwater ABL-MW005-F006 ABL-MW005 10/30/2018 X X
Groundwater ABL-MW001-F006 ABL-MW001 10/31/2018 X X
Groundwater ABL-MW002-F006 ABL-MW002 10/30/2018 X X
Groundwater ABL-MW006-F006 ABL-MW006 10/30/2018 X X
Surface Water ABL-SW008-D006 ABL-SW008 10/15/2018 X X X X
Surface Water ABL-SW008-F006 ABL-SW008 10/15/2018 X X X X
Oct 2018 Sampling Program - Investigation Summary Report for the ABL (Environeering, 2019)
5 of 9
Table 1
Summary of Samples Considered by CEC in SLERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Surface Water ABL-SW009-F006 ABL-SW009 10/15/2018 X X X X
Surface Water ABL-SW010-F006 ABL-SW010 10/15/2018 X X X X
Surface Water ABL-SW011-F006 ABL-SW011 10/15/2018 X X X X
Surface Water ABL-SW012-F006 ABL-SW012 10/15/2018 X X X X
Groundwater ABL-MW003-F007 ABL-MW003 1/31/2019 X X
Groundwater ABL-MW004-F007 ABL-MW004 1/31/2019 X X
Groundwater ABL-MW005-D007 ABL-MW005 1/31/2019 X X
Groundwater ABL-MW005-F007 ABL-MW005 1/31/2019 X X
Groundwater ABL-MW001-F007 ABL-MW001 1/31/2019 X X
Groundwater ABL-MW002-F007 ABL-MW002 1/31/2019 X X
Groundwater ABL-MW006-F007 ABL-MW006 1/30/2019 X X
Surface Water ABL-SW008-D007 ABL-SW008 1/30/2019 X X X X
Surface Water ABL-SW008-F007 ABL-SW008 1/30/2019 X X X X
Surface Water ABL-SW009-F007 ABL-SW009 1/30/2019 X X X X
Surface Water ABL-SW0010-F007 ABL-SW010 1/30/2019 X X X X
Surface Water ABL-SW0011-F007 ABL-SW011 1/30/2019 X X X X
Surface Water ABL-SW0012-F007 ABL-SW012 1/30/2019 X X X X
Groundwater ABL-MW003-F008 ABL-MW003 4/11/2019 X X
Groundwater ABL-MW004-F008 ABL-MW004 4/11/2019 X X
Groundwater ABL-MW005-D008 ABL-MW005 4/11/2019 X X
Jan 2019 Sampling Program - Investigation Summary Report for the ABL (Environeering, 2019)
Apr 2019 Sampling Program - Investigation Summary Report for the ABL (Environeering, 2019)
6 of 9
Table 1
Summary of Samples Considered by CEC in SLERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Groundwater ABL-MW005-F008 ABL-MW005 4/11/2019 X X
Groundwater ABL-MW001-F008 ABL-MW001 4/11/2019 X X
Groundwater ABL-MW002-F008 ABL-MW002 4/11/2019 X X
Groundwater ABL-MW006-F008 ABL-MW006 4/10/2019 X X
Surface Water ABL-SW008-D008 ABL-SW008 4/10/2019 X X X X X X X
Surface Water ABL-SW008-F008 ABL-SW008 4/10/2019 X X X X X X X
Surface Water ABL-SW009-F008 ABL-SW009 4/10/2019 X X X X
Surface Water ABL-SW010-F008 ABL-SW010 4/10/2019 X X X X
Surface Water ABL-SW011-F008 ABL-SW011 4/10/2019 X X X X
Surface Water ABL-SW012-F008 ABL-SW012 4/10/2019 X X X X
Soil SB-01 ABL-SB001 12/10/2019 X X X X
Soil SB-02 ABL-SB002 12/10/2019 X X X X
Soil SB-03 ABL-SB003 12/10/2019 X X X X
Soil SB-04 ABL-SB004 12/10/2019 X X X X
Soil SB-05 ABL-SB005 12/10/2019 X X X X
Soil SB-06 ABL-SB006 12/10/2019 X X X X
Soil SB-07 ABL-SB007 12/10/2019 X X X X
Soil SB-08 ABL-SB008 12/10/2019 X X X X
Soil SB-09 ABL-SB009 12/10/2019 X X X X
Soil REP-1 ABL-SB010 12/10/2019 X X X X
Soil SB-10 ABL-SB010 12/10/2019 X X X X
Dec 2019 Sampling Program - Investigation Summary Report for the ABL (CEC, 2020a)
7 of 9
Table 1
Summary of Samples Considered by CEC in SLERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Surface Water ABL-SW013-F009 ABL-SW013 7/14/2020 X X
Surface Water ABL-SW014-F009 ABL-SW014 7/14/2020 X X
Surface Water ABL-SW015-F009 ABL-SW015 7/14/2020 X X
Surface Water ABL-SW008-F009 ABL-SW008 7/14/2020 X X
Surface Water ABL-SW008(+100)-F009(Downstream) ABL-SW008(+100) 7/14/2020 X X
Surface Water ABL-SW009(-50)-F009 (Upstream) ABL-SW009(-50) 7/14/2020 X X
Surface Water ABL-SW009(+50)-F009 (Downstream) ABL-SW009(+50) 7/14/2020 X X
Surface Water ABL-SW012-F009 ABL-SW012 7/14/2020 X X
Surface Water ABL-SW013-F010 ABL-SW013 9/1/2020 X X X X
Surface Water ABL-SW014-F010 ABL-SW014 9/1/2020 X X X X
Surface Water ABL-SW015-F010 ABL-SW015 9/1/2020 X X X X
Surface Water ABL-SW008-F010 ABL-SW008 9/1/2020 X X X X
Surface Water ABL-SW008(+100)-F010 (Downstream) ABL-SW008(+100) 9/1/2020 X X X X
Surface Water ABL-SW009(-50)-F010 (Upstream) ABL-SW009(-50) 9/1/2020 X X X X
Surface Water ABL-SW009(+50)-F010 (Downstream) ABL-SW009(+50) 9/1/2020 X X X X
Surface Water ABL-SW012-F010 ABL-SW012 9/1/2020 X X X X
Sep 2020 Sampling Program - Surface Water Sampling Report for the ABL and Little Mountain Creek (CEC, 2021)
Jul 2020 Sampling Program - Surface Water Sampling Report for the ABL and Little Mountain Creek (CEC, 2020b)
8 of 9
Table 1
Summary of Samples Considered by CEC in SLERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes:
ABL - Alcoa Badin Landfill
CEC - Civil and Environmental Consultants, Inc.
CMS - Corrective Measures Study
References:
ENVIRONEERING. 2012. Phase 3 Engineering Data CollecƟon for the CorrecƟve Measures Study Report,ENVIRONEERING, Inc., Houston, TX. October 31.
Badin Works Facility, Badin, North Carolina. Prepared for Alcoa Inc., Badin, NC.
ENVIRONEERING. 2015. Alcoa Badin Landfill and Former Ball Field Sampling Activities,ENVIRONEERING, Inc., Morrisville, NC. September 15.
Former Badin Works Facility, Badin, North Carolina. Prepared for Alcoa, Inc., Badin, NC.
ENVIRONEERING. 2018. Investigative Report for the Little Mountain Creek Area, PA. ENVIRONEERING, Inc., Houston, TX. December 5
Badin Business Park Facility, Badin, North Carolina. Prepared for Badin Business Park LLC, Pittsburgh,
ENVIRONEERING. 2019. Addendum to InvesƟgaƟve Work Plan for the Phase 4 and 5 CorrecƟve Measures Study, Alcoa/Badin Landfill, and Former Ball Field.
Prepared for Badin Business Park LLC, Pittsburgh, PA. ENVIRONEERING, Inc., Houston, TX. April 15.
CEC. 2020a. Investigative Summary Report, Alcoa/Badin Municipal Landfill, Task 1 – Subtask 1 –
Surface Water Assessment, Badin Business Park Facility, Badin, North Carolina. Prepared for Badin Business Park LLC, Pittsburgh, PA.
Civil & Environmental Consultants, Inc., Knoxville, TN. February 27.
CEC. 2020b. Surface Water Sampling Report for the Alcoa/Badin Landfill and Little Mountain Creek,
Badin Business Park Facility, Badin, North Carolina. Prepared for Badin Business Park LLC, Pittsburgh, PA. Civil & Environmental Consultants, Inc.,
Knoxville, TN. September 23.
CEC. 2021. Surface Water Sampling Report for the Alcoa/Badin Landfill and Little Mountain Creek,
Badin Business Park Facility, Badin, North Carolina. Prepared for Badin Business Park LLC, Pittsburgh, PA. Civil & Environmental Consultants, Inc.,
Knoxville, TN. January 5.
9 of 9
Table 2
Surface Water Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Fraction
Screening
Level Units Source Notes
Alkalinity ALK -- 20000 μg/L EPA R4
Chloride 16887-00-6 -- 230000 μg/L NCDEQ
pH PH -- 6.0-9.0 SU EPA R4
Available Cyanide 57-12-5 -- 5 μg/L NCDEQ
Cyanide, Total or Free 57-12-5 -- 5 μg/L NCDEQ
Fluoride 16984-48-8 -- 1800 μg/L NCDEQ
Antimony 7440-36-0 -- 5300 μg/L NCDEQ
Arsenic 7440-38-2 Dissolved 150 μg/L NCDEQ
Barium 7440-39-3 Total 220 μg/L EPA R4
Beryllium 7440-41-7 Dissolved 6.5 μg/L NCDEQ
Cadmium 7440-43-9 Dissolved 0.413 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for using Little Mountain Creek September 2020
geometric mean hardness of 48 mg/L CaCO3.
Cadmium 7440-43-9 Dissolved 0.702 μg/L See Notes Calculated using the NC 02B Surface water standards hardness dependent formula for using Eastern Drainage Ditch September 2020
geometric mean hardness of 97 mg/L CaCO3.
Calcium 7440-70-2 Total 116000 μg/L EPA R4
Chromium, total 7440-47-3 Dissolved 40.63 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for Chromium III using Little Mountain Creek September
2020 geometric mean hardness of 48 mg/L CaCO3.
Chromium, total 7440-47-3 Dissolved 72.29 μg/L See Notes Calculated using the NC 02B Surface water standards hardness dependent formula for Chromium III using Eastern Drainage Ditch September
2020 geometric mean hardness of 97 mg/L CaCO3.
Cobalt 7440-48-4 -- 1.6 μg/L NCDEQ
Copper 7440-50-8 Dissolved 4.78 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for using Little Mountain Creek September 2020
geometric mean hardness of 48 mg/L CaCO3.
Copper 7440-50-8 Dissolved 8.73 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for using Eastern Drainage Ditch September 2020
geometric mean hardness of 97 mg/L CaCO3.
Lead 7439-92-1 Dissolved 1.12 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for using Little Mountain Creek September 2020
geometric mean hardness of 48 mg/L CaCO3.
Lead 7439-92-1 Dissolved 2.43 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for using Eastern Drainage Ditch September 2020
geometric mean hardness of 97 mg/L CaCO3.
Magnesium 7439-95-4 -- 82000 μg/L EPA R4
Mercury 7439-97-6 Total 0.012 μg/L NCDEQ
Nickel 7440-02-0 Dissolved 27.95 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for using Little Mountain Creek September 2020
geometric mean hardness of 48 mg/L CaCO3.
Nickel 7440-02-0 Dissolved 50.68 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for using Eastern Drainage Ditch September 2020
geometric mean hardness of 97 mg/L CaCO3.
Selenium, total 7782-49-2 Total 15.1 μg/L NCDEQ
Silver 7440-22-4 Dissolved 0.06 μg/L NCDEQ
Thallium 7440-28-0 -- 6 μg/L EPA R4
Tin 7440-31-5 -- 180 μg/L EPA R4
Vanadium 7440-62-2 Total 27 μg/L EPA R4
General Chemistry
Inorganics - Metals
Inorganics - Other
1 of 6
Table 2
Surface Water Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Fraction
Screening
Level Units Source Notes
Zinc 7440-66-6 Dissolved 62.92 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for using Little Mountain Creek September 2020
geometric mean hardness of 48 mg/L CaCO3.
Zinc 7440-66-6 Dissolved 114.19 μg/L See Notes
Calculated using the NC 02B Surface water standards hardness dependent formula for using Eastern Drainage Ditch September 2020
geometric mean hardness of 97 mg/L CaCO3.
4,4’-DDT 50-29-3 -- 0.001 μg/L NCDEQ
4,4'-DDD 72-54-8 -- 0.01 μg/L EPA R4
4,4'-DDE 72-55-9 -- 0.3 μg/L EPA R4
a- Hexachlorocyclohexane 319-84-6 -- 23 μg/L NCDEQ
Aldrin 309-00-2 -- 0.002 μg/L NCDEQ
b- Hexachlorocyclohexane 319-85-7 -- 55 μg/L NCDEQ
BHC-gamma (Lindane) 58-89-9 -- 0.01 μg/L NCDEQ
Chlordane 57-74-9 -- 0.004 μg/L NCDEQ
d- Hexachlorocyclohexane 319-86-8 -- 40 μg/L NCDEQ
Dieldrin 60-57-1 -- 0.002 μg/L NCDEQ
Endosulfan Sulfate 1031-07-8 -- 0.05 μg/L NCDEQ
Endosulfan, beta 33213-65-9 -- 0.05 μg/L NCDEQ
Endrin 72-20-8 -- 0.002 μg/L NCDEQ
Heptachlor 76-44-8 -- 0.004 μg/L NCDEQ
Heptachlor Epoxide 1024-57-3 -- 0.004 μg/L EPA R4
Toxaphene 8001-35-2 -- 0.0002 μg/L NCDEQ
Total PCBs - Aroclors tot_PCB_Aroclor -- 0.001 μg/L NCDEQ
Total PCBs - Congeners tot_PCB_Congener -- 0.001 μg/L NCDEQ
Acenaphthene 83-32-9 -- 56 μg/L See Notes
Acenaphthylene 208-96-8 -- 307 μg/L See Notes
Anthracene 120-12-7 -- 21 μg/L See Notes
Benz(a)anthracene 56-55-3 -- 2.2 μg/L See Notes
Benzo(a)pyrene 50-32-8 -- 0.96 μg/L See Notes
Benzo(b)fluoranthene 205-99-2 -- 0.68 μg/L See Notes
Benzo(g,h,i)perylene 191-24-2 -- 0.44 μg/L See Notes
Benzo(k)fluoranthene 207-08-9 -- 0.64 μg/L See Notes
Chrysene 218-01-9 -- 2 μg/L See Notes
Dibenz(a,h)anthracene 53-70-3 -- 0.28 μg/L See Notes
Fluoranthene 206-44-0 -- 7.1 μg/L See Notes
Fluorene 86-73-7 -- 39 μg/L See Notes
Indeno(1,2,3-cd)pyrene 193-39-5 -- 0.28 μg/L See Notes
Naphthalene 91-20-3 -- 194 μg/L See Notes
Phenanthrene 85-01-8 -- 19 μg/L See Notes
Pyrene 129-00-0 -- 10 μg/L See Notes
PCBs
PAHs
SVOCs
Pesticides
2 of 6
Table 2
Surface Water Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Fraction
Screening
Level Units Source Notes
1,2,4,5-Tetrachlorobenzene 95-94-3 -- 8.3 μg/L EPA R4
1,2,4-Trichlorobenzene 120-82-1 -- 61 μg/L NCDEQ
1,2-Dichlorobenzene 95-50-1 -- 470 μg/L NCDEQ
1,2-Diphenylhydrazine 122-66-7 -- 1.1 μg/L EPA R4
1,3,5-Trinitrobenzene (TNB) 99-35-4 -- 11 μg/L EPA R4
1,3-Dichlorobenzene 541-73-1 -- 390 μg/L NCDEQ
1,3-Dinitrobenzene (DNB) 99-65-0 -- 22 μg/L EPA R4
1,4-Dichlorobenzene 106-46-7 -- 9.4 μg/L EPA R4
1,4-Dioxane 123-91-1 -- 80 μg/L NCDEQ
1-Methylnaphthalene 90-12-0 -- 75 μg/L See Notes
2,3,4,6-Tetrachlorophenol 58-90-2 -- 1 μg/L EPA R4
2,4,5-Trichlorophenol 95-95-4 -- 1.9 μg/L EPA R4
2,4,6-Trichlorophenol 88-06-2 -- 4.9 μg/L EPA R4
2,4,6-Tribromophenol 118-79-6 -- 5.6 μg/L EPA R4
2,4-Dichlorophenol 120-83-2 -- 11 μg/L EPA R4
2,4-Dimethylphenol 105-67-9 -- 15 μg/L EPA R4
2,4-Dinitrophenol 51-28-5 -- 71 μg/L EPA R4
2,4-Dinitrotoluene 121-14-2 -- 44 μg/L EPA R4
2,6-Dinitrotoluene 606-20-2 -- 81 μg/L EPA R4
2-Chloronaphthalene 91-58-7 -- 110 μg/L NCDEQ
2-Chlorophenol 95-57-8 -- 18 μg/L EPA R4
2-Methylnaphthalene 91-57-6 -- 72 μg/L See Notes
2-Methylphenol (Cresol, o-) 95-48-7 -- 67 μg/L EPA R4
2-Nitroaniline 88-74-4 -- 17 μg/L EPA R4
2-Nitrophenol 88-75-5 -- 73 μg/L EPA R4
3- & 4-Methylphenol edms_0009 -- 53 μg/L See Notes Lower of 3- and 4- Methylphenol criteria
3,3'-Dichlorobenzidine 91-94-1 -- 4.5 μg/L EPA R4
3-Methyl-4-Chlorophenol 59-50-7 -- 1 μg/L EPA R4
4-Bromophenyl Phenyl Ether 101-55-3 -- 2 μg/L NCDEQ
4-Chloroaniline 106-47-8 -- 0.8 μg/L EPA R4
4-Nitrophenol 100-02-7 -- 58 μg/L EPA R4
Acetophenone 98-86-2 -- 8100 μg/L NCDEQ
Aniline 62-53-3 -- 4.1 μg/L EPA R4
Benzidine 92-87-5 -- 1.5 μg/L EPA R4
Benzoic Acid 65-85-0 -- 9000 μg/L NCDEQ
Benzyl Alcohol 100-51-6 -- 500 μg/L NCDEQ
Bis(2-Chloroethoxy)Methane 111-91-1 -- 9200 μg/L NCDEQ
Bis(2-Ethylhexyl)Phthalate 117-81-7 -- 5 μg/L NCDEQ
Butylbenzene Phthalate 85-68-7 -- 19 μg/L NCDEQ
Dibenzofuran 132-64-9 -- 4 μg/L EPA R4
Diethyl Phthalate 84-66-2 -- 1200 μg/L NCDEQ
3 of 6
Table 2
Surface Water Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Fraction
Screening
Level Units Source Notes
Dimethoate 60-51-5 -- 0.3 μg/L NCDEQ
Dimethyl Phthalate 131-11-3 -- 3400 μg/L NCDEQ
Di-n-butyl Pthalate 84-74-2 -- 9.5 μg/L NCDEQ
Di-n-Octyl Phthalate 117-84-0 -- 215 μg/L EPA R4
Dinoseb 88-85-7 -- 3 μg/L NCDEQ
Hexachlorobenzene 118-74-1 -- 0.15 μg/L EPA R4
Hexachlorobutadiene 87-68-3 -- 1 μg/L EPA R4
Hexachlorocyclopentadiene 77-47-4 -- 0.07 μg/L NCDEQ
Hexachloroethane 67-72-1 -- 12 μg/L EPA R4
Isophorone 78-59-1 -- 920 μg/L EPA R4
Nitrobenzene 98-95-3 -- 4600 μg/L NCDEQ
Nitrosamines 55-18-5 -- 25000 μg/L NCDEQ
N-Nitrosodimethyl-amine 62-75-9 -- 17000 μg/L NCDEQ
N-Nitrosodiphenylamine 86-30-6 -- 290 μg/L NCDEQ
Parathion 56-38-2 -- 0.013 μg/L NCDEQ
Pentachlorobenzene 608-93-5 -- 0.51 μg/L NCDEQ
Pentachlorophenol 87-86-5 -- 15 μg/L EPA R4
Phenol 108-95-2 -- 160 μg/L EPA R4
Pyridine 110-86-1 -- 5000 μg/L NCDEQ
1,1,1,2-Tetrachloroethane 630-20-6 -- 85 μg/L EPA R4
1,1,1-Trichloroethane 71-55-6 -- 2500 μg/L NCDEQ
1,1,2,2-Tetrachloroethane 79-34-5 -- 200 μg/L EPA R4
1,1,2,2-Tetrachloroethylene (PCE) 127-18-4 -- 53 μg/L EPA R4
1,1,2-Trichloroethane 79-00-5 -- 2300 μg/L NCDEQ
1,1,2-Trichloroethylene (TCE) 79-01-6 -- 220 μg/L EPA R4
1,1-Dichloroethane 75-34-3 -- 410 μg/L EPA R4
1,1-Dichloroethene (1,1-Dichloroethylene) 75-35-4 -- 130 μg/L EPA R4
1,2 –Dibromomethane 106-93-4 -- -- -- No ESV
1,2,3-Trichlorobenzene 87-61-6 -- 8 μg/L EPA R4
1,2,3-Trichloropropane 96-18-4 -- -- -- No ESV
1,2,4-Trimethylbenzene 95-63-6 -- 390 μg/L NCDEQ
1,2-cis-Dichloroethylene 156-59-2 -- 620 μg/L EPA R4
1,2-Dibromo-3-chloropropane 96-12-8 -- -- -- No ESV
1,2-Dichloroethane 107-06-2 -- 2000 μg/L EPA R4
1,2-Dichloroethene (1,2-Dichloroethylene) 540-59-0 -- 970 μg/L EPA R4
1,2-Dichloropropane 78-87-5 -- 520 μg/L EPA R4
1,2-trans-Dichloroethylene 156-60-5 -- 558 μg/L EPA R4
1,3,5-Trimethylbenzene 108-67-8 -- 630 μg/L NCDEQ
2-Butanone (methyl ethyl ketone) 78-93-3 -- 26000 μg/L NCDEQ
2-Hexanone (methyl butyl ketone) 591-78-6 -- 99 μg/L EPA R4
VOCs
4 of 6
Table 2
Surface Water Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Fraction
Screening
Level Units Source Notes
4-Methyl-2-pentanone (MIBK)108-10-1 -- 26000 μg/L NCDEQ
Acetone 67-64-1 -- 2000 μg/L NCDEQ
Acetonitrile 75-05-8 -- 12000 μg/L EPA R4
Acrolein 107-02-8 -- 3 μg/L EPA R4
Acrylonitrile 107-13-1 -- 420 μg/L NCDEQ
Benzene 71-43-2 -- 160 μg/L EPA R4
Bromoform (tribromomethane)75-25-2 -- 230 μg/L EPA R4
Bromomethane (methyl bromide)74-83-9 -- 0.04 μg/L NCDEQ
Carbon Disulfide 75-15-0 -- 100 μg/L NCDEQ
Chlorobenzene 108-90-7 -- 140 μg/L NCDEQ
Chloroethene (Vinyl chloride)75-01-4 -- 930 μg/L EPA R4
cis-1,3-Dichloropropene 542-75-6 -- 1.7 μg/L EPA R4
Cymene, p- (4-Isopropyltoluene)99-87-6 -- 320 μg/L NCDEQ
Dibromochloromethane 124-48-1 -- 320 μg/L EPA R4
Dichlorobromomethane 75-27-4 -- 340 μg/L EPA R4
Dichloromethane (Methylene chloride) 75-09-2 -- 11000 μg/L NCDEQ
Ethylbenzene 100-41-4 -- 97 μg/L NCDEQ
Isopropyl Ether 108-20-3 -- 20000 μg/L NCDEQ
Isopropylbenzene (Cumene)98-82-8 -- 250 μg/L NCDEQ
M,P-Xylene 179601-23-1 -- 420 μg/L See Notes Screening level was selected as the lesser of the existing M- and P- xylene standards.
Methyl Chloride 74-87-3 --No ESV
Methyl Methacrylate 80-62-6 -- 9600 μg/L NCDEQ
Methyl tert-butyl ether (MTBE)1634-04-4 -- 34000 μg/L NCDEQ
n-Butyl Benzene 104-51-8 -- 3.9 μg/L NCDEQ
n-Propyl Benzene 103-65-1 -- 80 μg/L NCDEQ
o-Xylene 95-47-6 -- 600 μg/L NCDEQ
Styrene (vinyl benzene)100-42-5 -- 32 μg/L EPA R4
Tetrachloromethane (Carbon tetrachloride) 56-23-5 -- 77 μg/L EPA R4
Toluene 108-88-3 -- 11 μg/L NCDEQ
trans-1,3-Dichloropropene 542-75-6 -- 1.7 μg/L EPA R4
Trichlorofluoromethane 75-69-4 -- -- -- No ESV
Trichloromethane (Chloroform)67-66-3 -- 140 μg/L EPA R4
Vinyl acetate 108-05-4 -- 16 μg/L EPA R4
Xylenes 1330-20-7 -- 670 μg/L NCDEQ
5 of 6
Table 2
Surface Water Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (97 mg/L CaCO3).
Little Mountain Creek hardness adjusted screening levels were used to screen data from Little Mountain Creek. Eastern Drainage Ditch hardness adjusted screening levels were used to screen data from ditches and groundwater.
Fractions are presented when stated in the guidance.
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
μg/L - Microgram per liter
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
6 of 6
Notes:
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (48 mg/L CaCO3).
Table 3
Sediment Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Screening
Level Units Source Notes
Arsenic 7440-38-2 33 mg/kg EPA R4 RSV
Barium 7440-39-3 60 mg/kg EPA R4 RSV
Cadmium 7440-43-9 5 mg/kg EPA R4 RSV
Chromium (Total)7440-47-3 111 mg/kg EPA R4 RSV
Lead 7439-92-1 128 mg/kg EPA R4 RSV
Mercury 7439-97-6 1.1 mg/kg EPA R4 RSV
Selenium 7782-49-2 2.9 mg/kg EPA R4 RSV
Silver 7440-22-4 2.2 mg/kg EPA R4 RSV
Total PCBs Aroclors 1336-36-3 0.676 mg/kg EPA R4 RSV
Total PCBs Congeners 1336-36-3 0.676 mg/kg EPA R4 RSV
Acenaphthene 83-32-9 9.82 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Acenaphthylene 208-96-8 9.04 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Anthracene 120-12-7 11.88 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Benz(a)anthracene 56-55-3 16.82 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Benzo(a)pyrene 50-32-8 19.3 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Benzo(b)fluoranthene 205-99-2 19.58 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Benzo(g,h,i)perylene 191-24-2 21.8 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Benzo(k)fluoranthene 207-08-9 19.62 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Chrysene 218-01-9 16.88 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Dibenz(a,h)anthracene 53-70-3 22.4 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Fluoranthene 206-44-0 14.14 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Fluorene 86-73-7 10.76 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Indeno(1,2,3-cd)pyrene 193-39-5 22.4 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Naphthalene 91-20-3 7.7 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Phenanthrene 85-01-8 11.92 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Pyrene 129-00-0 13.94 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Metals
PCBs
PAHs
1 of 5
Table 3
Sediment Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Screening
Level Units Source Notes
1,2,4-Trichlorobenzene 120-82-1 0.97 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,2-Dichlorobenzene 95-50-1 0.954 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,3-Dichlorobenzene 541-73-1 0.936 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,4-Dichlorobenzene 106-46-7 0.936 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1-Methylnaphthalene 90-12-0 8.92 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2,4,5-Trichlorophenol 95-95-4 3.928 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2,4,6-Trichlorophenol 88-06-2 3.928 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2,4-Dichlorophenol 120-83-2 3.772 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2,4-Dimethylphenol 105-67-9 2.874 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2,4-Dinitrophenol 51-28-5 5.922 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2,4-Dinitrotoluene 121-14-2 2.9 mg/kg EPA R4 RSV
2,6-Dinitrotoluene 606-20-2 0.262 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2-Chlorophenol 95-57-8 0.55 mg/kg EPA R4 RSV
2-Methyl-4,6-Dinitrophenol 534-52-1 4.608 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2-Methylnaphthalene 91-57-6 8.94 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2-Methylphenol (o-cresol) 95-48-7 3.546 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2-Nitrophenol 88-75-5 7.178 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
3,3'-Dichlorobenzidine 91-94-1 0.18 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
3-Methyl-4-Chlorophenol 59-50-7 4.07 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
4-Bromophenyl phenyl ether 101-55-3 0.124 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
4-Chloroaniline 106-47-8 0.042 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
4-Nitrophenol 100-02-7 8.21 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Aniline 62-53-3 0.024 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Benzoic Acid 65-85-0 4 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Benzyl alcohol 100-51-6 13.458 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
bis(2-Chloroethyl) Ether 111-44-4 16.326 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Bis(2-ethylhexyl)phthalate 117-81-7 5.2 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Butyl benzyl phthalate 85-68-7 0.962 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
SVOCs
2 of 5
Table 3
Sediment Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Screening
Level Units Source Notes
Dibenzofuran 132-64-9 4.626 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Diethyl phthalate 84-66-2 2.21 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Dimethyl phthalate 131-11-3 4.062 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Di-n-butyl phthalate 84-74-2 0.638 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Di-n-octyl phthalate 117-84-0 2.2 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Hexachlorobenzene 118-74-1 0.48 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Hexachlorocyclopentadiene 77-47-4 0.81 mg/kg EPA R4 RSV
Hexachloroethane 67-72-1 0.15 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Isophorone 78-59-1 1.896 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Nitrobenzene 98-95-3 18.014 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
N-Nitrosodiphenylamine 86-30-6 0.74 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Pentachlorophenol 87-86-5 1.2 mg/kg EPA R4 RSV
Phenol 108-95-2 0.21 mg/kg EPA R4 RSV
1,1,1,2-Tetrachloroethane 630-20-6 0.836 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,1,1-Trichloroethane 71-55-6 0.734 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,1,2,2-Tetrachloroethane 79-34-5 4.46 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,1,2,2-Tetrachloroethylene (PCE)127-18-4 0.83 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,1,2-Trichloroethane 79-00-5 3.09 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,1,2-Trichloroethylene (TCE)79-01-6 1.384 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,1-Dichloroethane 75-34-3 3.332 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,1-Dichloroethene (1,1-Dichloroethylene)75-35-4 1.506 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,2,3-Trichlorobenzene 87-61-6 0.99 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,2,4-Trimethylbenzene 95-63-6 0.722 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,2-cis-Dichloroethyene 156-59-2 2.27 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,2-Dichloroethane 107-06-2 2.262 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,2-Dichloropropane 78-87-5 1.752 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,2-trans-Dichloroethylene 156-60-5 2.27 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
1,3,5-Trimethylbenzene 108-67-8 0.708 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
VOCs
3 of 5
Table 3
Sediment Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Screening
Level Units Source Notes
2-Butanone (methyl ethyl ketone)78-93-3 45.414 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
2-Hexanone (methyl butyl ketone)591-78-6 15.196 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
4-Methyl-2-pentanone (MIBK)108-10-1 16.33 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Acetone 67-64-1 76.266 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Benzene 71-43-2 4.37 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Bromoform (tribromomethane)75-25-2 0.284 mg/kg EPA R4 ESV Result normalized to site-wide value of 0.5% OC
Bromomethane (methyl bromide)74-83-9 0.013 mg/kg EPA R4 ESV Result normalized to site-wide value of 0.5% OC
Chlorobenzene 108-90-7 1.878 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Chloroethene (Vinyl chloride)75-01-4 2.356 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Cymene, p- (4-Isopropyltoluene)99-87-6 0.484 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Dibromochloromethane 124-48-1 0.396 mg/kg EPA R4 ESV Result normalized to site-wide value of 0.5% OC
Dichlorobromomethane 75-27-4 0.42 mg/kg EPA R4 ESV Result normalized to site-wide value of 0.5% OC
Dichloromethane (methylene chloride)75-09-2 4.808 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Ethylbenzene 100-41-4 2.934 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Isopropylbenzene (Cumene)98-82-8 1.426 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Methyl tert-butyl ether (MTBE)1634-04-4 8.866 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Styrene (Vinyl benzene)100-42-5 3.242 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Tetrachloromethane (Carbon tetrachloride) 56-23-5 1.412 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Toluene 108-88-3 4.148 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Trichloromethane (Chloroform)67-66-3 6.704 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Vinyl acetate 108-05-4 4.46 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
Xylenes (total)1330-20-7 2.148 mg/kg EPA R4 RSV Result normalized to site-wide value of 0.5% OC
4 of 5
Table 3
Sediment Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes:
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance
Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs.
PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
mg/kg - Milligrams per kilogram
Min - Minimum
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
RSV - Refined screening value
SVOC - Semi-volatile organic compound
References:
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division.
Updated March 2018.
5 of 5
Table 4
Soil Ecological Screening Values
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS RN Screening Level Units Source
Total LMWPAHs - 29 mg/kg EPA R4
Total HMWPAHs - 1.1 mg/kg EPA R4
PCBs (total) Aroclors 1336-36-3 0.041 mg/kg EPA R4
Notes:
The soil screening levels presented above are the recommended screening levels from the USEPA Region
4 Ecological Risk Assessment Supplemental Guidance Table 3: Region 4 Soil Screening
Values for Hazardous Waste Sites.
HMW - High molecular weight
LMW - Low molecular weight
mg/kg - miligrams per kilogram
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
References:
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4,
Scientific Support Section - Superfund Division. Updated March 2018.
PAHs
PCBs
1 of 1
Table 5
Summary of Samples Included in BERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesGroundwater Wet Well ABLWWF001 ABL-WW 8/1/2011 X
Groundwater Wet Well WET WELL ABL-WW 8/30/2011 X
Groundwater Floodplain ABLMW03F001 ABL-MW003 8/2/2011 X
Groundwater Floodplain ABLMW04F001 ABL-MW004 8/1/2011 X
Groundwater Floodplain ABLMW05F001 ABL-MW005 8/1/2011 X
Groundwater Floodplain ABLMW03F002 ABL-MW003 11/15/2011 X X X
Groundwater Floodplain ABLMW04F002 ABL-MW004 11/15/2011 X X X
Groundwater Floodplain ABLMW05F002 ABL-MW005 11/15/2011 X X X X X X X
Groundwater Landfill ABLPZ15F002 ABL-PZ15 11/15/2011 X X X
Groundwater Landfill ABLPZ16F002 ABL-PZ16 11/15/2011 X X X
Groundwater Landfill ABLPZ17F002 ABL-PZ17 11/15/2011 X X X
Groundwater Landfill ABLPZ18F002 ABL-PZ18 11/16/2011 X X X
Groundwater Landfill ABLPZ19F002 ABL-PZ19 11/15/2011 X X
Groundwater Landfill ABLPZ19F002 ABL-PZ19 11/21/2011 X
Groundwater Upgradient Landfill ABLMW01F002 ABL-MW001 11/14/2011 X X X
Groundwater Upgradient Landfill ABLMW02F002 ABL-MW002 11/15/2011 X X X
Groundwater Upgradient Landfill ABLMW06F002 ABL-MW006 11/14/2011 X X X
Surface Water Little Mountain Creek ABLSWL01F001 ABL-SWL01 11/18/2011 X X X X X
Groundwater Floodplain ABLMW03F002 ABL-MW003 5/10/2012 X X X
Groundwater Floodplain ABLMW04F002 ABL-MW004 5/10/2012 X X X
Groundwater Floodplain ABLMW05F002 ABL-MW005 5/10/2012 X X X
Groundwater Landfill ABLPZ15F002 ABL-PZ15 5/9/2012 X X X
Groundwater Landfill ABLPZ16F002 ABL-PZ16 5/10/2012 X X X
Groundwater Landfill ABLPZ17F002 ABL-PZ17 5/10/2012 X X X
Groundwater Landfill ABLPZ18F002 ABL-PZ18 5/9/2012 X X X
Matrix Type Exposure Area Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Aug 2011 Sampling Program - Phase 3 Engineering Data Collection for the CMS (Environeering, 2012)
Nov 2011 Sampling Program - Phase 3 Engineering Data Collection for the CMS (Environeering, 2012)
May 2012 Sampling Program - Phase 3 Engineering Data Collection for the CMS (Environeering, 2012)
1 of 7
Table 5
Summary of Samples Included in BERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Exposure Area Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Groundwater Landfill ABLPZ19F002 ABL-PZ19 5/10/2012 X X
Groundwater Upgradient Landfill ABLMW01F002 ABL-MW001 5/8/2012 X X X
Groundwater Upgradient Landfill ABLMW02F002 ABL-MW002 5/8/2012 X X X
Groundwater Upgradient Landfill ABLMW06F002 ABL-MW006 5/8/2012 X X X
Groundwater Floodplain ABLMW3F003 ABL-MW003 7/31/2012 X X X
Groundwater Floodplain ABLMW4F003 ABL-MW004 7/31/2012 X X X
Groundwater Floodplain ABLMW5F003 ABL-MW005 7/31/2012 X X X
Groundwater Upgradient Landfill ABLMW02F003 ABL-MW002 7/30/2012 X X X
Groundwater Upgradient Landfill ABLMW06F003 ABL-MW006 7/30/2012 X X X
Groundwater Landfill ABLPZ15F003 ABL-PZ15 8/3/2012 X X X
Groundwater Landfill ABLPZ16F003 ABL-PZ16 8/3/2012 X X X
Groundwater Landfill ABLPZ17F003 ABL-PZ17 8/3/2012 X X X
Groundwater Landfill ABLPZ18F003 ABL-PZ18 8/3/2012 X X X
Groundwater Upgradient Landfill ABLMW1F003 ABL-MW001 8/3/2012 X X X
Sediment Eastern Drainage Ditch ABL-SD006-F004 ABL-SD006 7/21/2015 X X X X X X X X
Sediment Little Mountain Creek ABL-SD001-F004 ABL-SD001 7/21/2015 X X X X X X X X
Sediment Little Mountain Creek ABL-SD002-F004 ABL-SD002 7/21/2015 X X X X X X X X
Sediment Upgradient Little Mountain Creek ABL-SD003-F004 ABL-SD003 7/21/2015 X X X X X X X X
Sediment WB Wetland /SB Ditch ABL-SD004-F004 ABL-SD004 7/21/2015 X X X X X X X X
Sediment WC Wetland /WC Ditch ABL-SD005-F004 ABL-SD005 7/21/2015 X X X X X X X X
Surface Water Eastern Drainage Ditch ABL-ML003-F004 ABL-ML003 7/21/2015 X X X X X X
Surface Water Eastern Drainage Ditch ABL-SW006-F004 ABL-SW006 7/21/2015 X X X X X X X
Surface Water Little Mountain Creek ABL-SW001-F004 ABL-SW001 7/21/2015 X X X X X X X
Surface Water Little Mountain Creek ABL-SW002-F004 ABL-SW002 7/21/2015 X X X X X X X
Surface Water Upgradient Little Mountain Creek ABL-SW003-F004 ABL-SW003 7/21/2015 X X X X X X X
Surface Water WB Wetland /SB Ditch ABL-SW004-F004 ABL-SW004 7/21/2015 X X X X X X X
Jul/Aug 2012 Sampling Program - Phase 3 Engineering Data Collection for the CMS (Environeering, 2012)
Jul 2015 Sampling Program - ABL and Former Ball Field Sampling Activities (Environeering, 2015)
2 of 7
Table 5
Summary of Samples Included in BERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Exposure Area Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Surface Water WC Wetland /WC Ditch ABL-ML002-F004 ABL-ML002 7/21/2015 X X X X X X
Surface Water WY Wetland /SB Ditch ABL-ML001-F004 ABL-ML001 7/21/2015 X X X X X X
Sediment Eastern Drainage Ditch ABL-SD010-F005 ABL-SD010 7/11/2018 X X X X X
Sediment Eastern Drainage Ditch ABL-SD011-F005 ABL-SD011 7/11/2018 X X X X X
Sediment Eastern Drainage Ditch ABL-SD012-F005 ABL-SD012 7/11/2018 X X X X X
Sediment Little Mountain Creek ABL-SD007-F005 ABL-SD007 7/12/2018 X X X X X
Sediment Upgradient Little Mountain Creek ABL-SD008-F005 ABL-SD008 7/12/2018 X X X X X
Groundwater Floodplain ABL-MW003-F005 ABL-MW003 7/11/2018 X X
Groundwater Floodplain ABL-MW004-F005 ABL-MW004 7/11/2018 X X
Groundwater Floodplain ABL-MW005-F005 ABL-MW005 7/11/2018 X X
Groundwater Upgradient Landfill ABL-MW001-F005 ABL-MW001 7/10/2018 X X
Groundwater Upgradient Landfill ABL-MW002-F005 ABL-MW002 7/10/2018 X X
Groundwater Upgradient Landfill ABL-MW006-F005 ABL-MW006 7/10/2018 X X
Groundwater Upgradient Landfill ABL-MW006-F005-2 ABL-MW006 7/10/2018 X
Surface Water Eastern Drainage Ditch ABL-SW013-F005 ABL-SW013 7/11/2018 X X X X X X
Surface Water Eastern Drainage Ditch ABL-SW014-F005 ABL-SW014 7/11/2018 X X X X X X
Surface Water Eastern Drainage Ditch ABL-SW015-F005 ABL-SW015 7/11/2018 X X X X X X
Surface Water Little Mountain Creek ABL-SW008-F005 ABL-SW008 7/12/2018 X X X X X X X X X X
Surface Water Little Mountain Creek ABL-SW009-F005 ABL-SW009 7/12/2018 X X X X X X
Surface Water Little Mountain Creek ABL-SW010-F005 ABL-SW010 7/12/2018 X X X X X X
Surface Water Little Mountain Creek ABL-SW011-F005 ABL-SW011 7/12/2018 X X X X X X
Surface Water Upgradient Little Mountain Creek ABL-SW012-F005 ABL-SW012 7/12/2018 X X X X X X X X X X
Groundwater Floodplain ABL-MW003-F006 ABL-MW003 10/30/2018 X X
Groundwater Floodplain ABL-MW004-F006 ABL-MW004 10/30/2018 X X
Groundwater Floodplain ABL-MW005-F006 ABL-MW005 10/30/2018 X X
Groundwater Upgradient Landfill ABL-MW001-F006 ABL-MW001 10/31/2018 X X
Jul 2018 Sampling Program - Investigative Report for the Little Mountain Creek Area (Environeering, 2018)
Oct 2018 Sampling Program - Investigation Summary Report for the ABL (Environeering, 2019)
3 of 7
Table 5
Summary of Samples Included in BERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Exposure Area Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Groundwater Upgradient Landfill ABL-MW002-F006 ABL-MW002 10/30/2018 X X
Groundwater Upgradient Landfill ABL-MW006-F006 ABL-MW006 10/30/2018 X X
Surface Water Little Mountain Creek ABL-SW008-F006 ABL-SW008 10/15/2018 X X X X
Surface Water Little Mountain Creek ABL-SW009-F006 ABL-SW009 10/15/2018 X X X X
Surface Water Little Mountain Creek ABL-SW010-F006 ABL-SW010 10/15/2018 X X X X
Surface Water Little Mountain Creek ABL-SW011-F006 ABL-SW011 10/15/2018 X X X X
Surface Water Upgradient Little Mountain Creek ABL-SW012-F006 ABL-SW012 10/15/2018 X X X X
Groundwater Floodplain ABL-MW003-F007 ABL-MW003 1/31/2019 X X
Groundwater Floodplain ABL-MW004-F007 ABL-MW004 1/31/2019 X X
Groundwater Floodplain ABL-MW005-F007 ABL-MW005 1/31/2019 X X
Groundwater Upgradient Landfill ABL-MW001-F007 ABL-MW001 1/31/2019 X X
Groundwater Upgradient Landfill ABL-MW002-F007 ABL-MW002 1/31/2019 X X
Groundwater Upgradient Landfill ABL-MW006-F007 ABL-MW006 1/30/2019 X X
Surface Water Little Mountain Creek ABL-SW008-F007 ABL-SW008 1/30/2019 X X X X
Surface Water Little Mountain Creek ABL-SW009-F007 ABL-SW009 1/30/2019 X X X X
Surface Water Little Mountain Creek ABL-SW0010-F007 ABL-SW010 1/30/2019 X X X X
Surface Water Little Mountain Creek ABL-SW0011-F007 ABL-SW011 1/30/2019 X X X X
Surface Water Upgradient Little Mountain Creek ABL-SW0012-F007 ABL-SW012 1/30/2019 X X X X
Groundwater Floodplain ABL-MW003-F008 ABL-MW003 4/11/2019 X X
Groundwater Floodplain ABL-MW004-F008 ABL-MW004 4/11/2019 X X
Groundwater Floodplain ABL-MW005-F008 ABL-MW005 4/11/2019 X X
Groundwater Upgradient Landfill ABL-MW001-F008 ABL-MW001 4/11/2019 X X
Groundwater Upgradient Landfill ABL-MW002-F008 ABL-MW002 4/11/2019 X X
Groundwater Upgradient Landfill ABL-MW006-F008 ABL-MW006 4/10/2019 X X
Surface Water Little Mountain Creek ABL-SW008-F008 ABL-SW008 4/10/2019 X X X X X X X
Surface Water Little Mountain Creek ABL-SW009-F008 ABL-SW009 4/10/2019 X X X X
Jan 2019 Sampling Program - Investigation Summary Report for the ABL (Environeering, 2019)
Apr 2019 Sampling Program - Investigation Summary Report for the ABL (Environeering, 2019)
4 of 7
Table 5
Summary of Samples Included in BERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Exposure Area Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Surface Water Little Mountain Creek ABL-SW010-F008 ABL-SW010 4/10/2019 X X X X
Surface Water Little Mountain Creek ABL-SW011-F008 ABL-SW011 4/10/2019 X X X X
Surface Water Upgradient Little Mountain Creek ABL-SW012-F008 ABL-SW012 4/10/2019 X X X X
Soil Eastern Drainage Ditch SB-01 ABL-SB001 12/10/2019 X X X X
Soil Eastern Drainage Ditch SB-02 ABL-SB002 12/10/2019 X X X X
Soil Eastern Drainage Ditch SB-03 ABL-SB003 12/10/2019 X X X X
Soil Eastern Drainage Ditch SB-04 ABL-SB004 12/10/2019 X X X X
Soil Eastern Drainage Ditch SB-05 ABL-SB005 12/10/2019 X X X X
Soil Eastern Drainage Ditch SB-06 ABL-SB006 12/10/2019 X X X X
Soil Eastern Drainage Ditch SB-07 ABL-SB007 12/10/2019 X X X X
Soil Eastern Drainage Ditch SB-08 ABL-SB008 12/10/2019 X X X X
Soil Eastern Drainage Ditch SB-09 ABL-SB009 12/10/2019 X X X X
Soil Eastern Drainage Ditch SB-10 ABL-SB010 12/10/2019 X X X X
Soil Substation A SB-11 ABL-SB011 12/10/2019 X X X X
Soil Substation A SB-12 ABL-SB012 12/10/2019 X X X X
Soil Substation A SB-13 ABL-SB013 12/10/2019 X X X X
Soil Substation A SB-14 ABL-SB014 12/10/2019 X X X X
Soil Substation A SB-15 ABL-SB015 12/10/2019 X X X X
Soil Substation B SB-16 ABL-SB016 12/10/2019 X X X X
Soil Substation B SB-17 ABL-SB017 12/10/2019 X X X X
Soil Substation B SB-18 ABL-SB018 12/10/2019 X X X X
Soil Substation B SB-19 ABL-SB019 12/10/2019 X X X X
Soil Substation B SB-20 ABL-SB020 12/10/2019 X X X X
Surface Water Eastern Drainage Ditch ABL-SW013-F009 ABL-SW013 7/14/2020 X X
Surface Water Eastern Drainage Ditch ABL-SW014-F009 ABL-SW014 7/14/2020 X X
Surface Water Eastern Drainage Ditch ABL-SW015-F009 ABL-SW015 7/14/2020 X X
Dec 2019 Sampling Program - Investigation Summary Report for the ABL (CEC, 2020a)
Jul 2020 Sampling Program - Surface Water Sampling Report for the ABL and Little Mountain Creek (CEC, 2020b)
5 of 7
Table 5
Summary of Samples Included in BERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
FluorideCyanide (Total or Available)General ChemistryMetalsPolycyclic Aromatic Hydrocarbons (PAHs)Semi-Volatile Organic Compounds (SVOCs)Volatile Organic Compounds (VOCs)Polychlorinated Biphenyls (PCBs) - AroclorsPolychlorinated Biphenyls (PCBs) - CongenersPesticidesMatrix Type Exposure Area Sample ID Sample Location Date Sampled
Analyte or Analyte Group
Surface Water Little Mountain Creek ABL-SW008-F009 ABL-SW008 7/14/2020 X X
Surface Water Little Mountain Creek ABL-SW008(+100)-F009(Downstream) ABL-SW008(+100) 7/14/2020 X X
Surface Water Little Mountain Creek ABL-SW009(-50)-F009 (Upstream) ABL-SW009(-50) 7/14/2020 X X
Surface Water Little Mountain Creek ABL-SW009(+50)-F009 (Downstream) ABL-SW009(+50) 7/14/2020 X X
Surface Water Upgradient Little Mountain Creek ABL-SW012-F009 ABL-SW012 7/14/2020 X X
Surface Water Eastern Drainage Ditch ABL-SW013-F010 ABL-SW013 9/1/2020 X X X X
Surface Water Eastern Drainage Ditch ABL-SW014-F010 ABL-SW014 9/1/2020 X X X X
Surface Water Eastern Drainage Ditch ABL-SW015-F010 ABL-SW015 9/1/2020 X X X X
Surface Water Little Mountain Creek ABL-SW008-F010 ABL-SW008 9/1/2020 X X X X
Surface Water Little Mountain Creek ABL-SW008(+100)-F010 (Downstream) ABL-SW008(+100) 9/1/2020 X X X X
Surface Water Little Mountain Creek ABL-SW009(-50)-F010 (Upstream) ABL-SW009(-50)9/1/2020 X X X X
Surface Water Little Mountain Creek ABL-SW009(+50)-F010 (Downstream) ABL-SW009(+50) 9/1/2020 X X X X
Surface Water Upgradient Little Mountain Creek ABL-SW012-F010 ABL-SW012 9/1/2020 X X X X
Sep 2020 Sampling Program - Surface Water Sampling Report for the ABL and Little Mountain Creek (CEC, 2021)
6 of 7
Table 5
Summary of Samples Included in BERA by Event and Matrix
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes:
ABL - Alcoa Badin Landfill
CEC - Civil and Environmental Consultants, Inc.
CMS - Corrective Measures Study
References:
ENVIRONEERING. 2012. Phase 3 Engineering Data CollecƟon for the CorrecƟve Measures Study Report,ENVIRONEERING, Inc., Houston, TX. October 31.
Badin Works Facility, Badin, North Carolina. Prepared for Alcoa Inc., Badin, NC.
ENVIRONEERING. 2015. Alcoa Badin Landfill and Former Ball Field Sampling Activities,ENVIRONEERING, Inc., Morrisville, NC. September 15.
Former Badin Works Facility, Badin, North Carolina. Prepared for Alcoa, Inc., Badin, NC.
ENVIRONEERING. 2018. Investigative Report for the Little Mountain Creek Area, PA. ENVIRONEERING, Inc., Houston, TX. December 5
Badin Business Park Facility, Badin, North Carolina. Prepared for Badin Business Park LLC, Pittsburgh,
ENVIRONEERING. 2019. Addendum to InvesƟgaƟve Work Plan for the Phase 4 and 5 CorrecƟve Measures Study, Alcoa/Badin Landfill, and Former Ball Field.
Prepared for Badin Business Park LLC, Pittsburgh, PA. ENVIRONEERING, Inc., Houston, TX. April 15.
CEC. 2020a. Investigative Summary Report, Alcoa/Badin Municipal Landfill, Task 1 – Subtask 1 –
Surface Water Assessment, Badin Business Park Facility, Badin, North Carolina. Prepared for Badin Business Park LLC, Pittsburgh, PA.
Civil & Environmental Consultants, Inc., Knoxville, TN. February 27.
CEC. 2020b. Surface Water Sampling Report for the Alcoa/Badin Landfill and Little Mountain Creek,
Badin Business Park Facility, Badin, North Carolina. Prepared for Badin Business Park LLC, Pittsburgh, PA. Civil & Environmental Consultants, Inc.,
Knoxville, TN. September 23.
CEC. 2021. Surface Water Sampling Report for the Alcoa/Badin Landfill and Little Mountain Creek,
Badin Business Park Facility, Badin, North Carolina. Prepared for Badin Business Park LLC, Pittsburgh, PA. Civil & Environmental Consultants, Inc.,
Knoxville, TN. January 5.
7 of 7
Table 6
Summary Surface Water Screening - Detections in Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*Total
Samples Detects Non-
Detects Min Max Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/L 0.005 NCDEQ 0.0049 0.004 31 3 28 0.002 0.004 ABL-SW001 0.0049 0.00351 0 0 1.0 0.7 No COPEC: EPC<ESV
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 0.17 0.04 31 19 12 0.04 0.25 ABL-SW008(+100)0.25 0.0819 0 0 0.1 0.0 No COPEC: EPC<ESV
Metals
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0109 0.0098 2 2 0 0.0025 0.0025 ABL-SW001 0.0109 0.01035 0 0 0.0 0.0 No COPEC: EPC<ESV
Calcium 7440-70-2 mg/L 116 USEPA R4 11 11 4 4 0 0.025 0.025
ABL-SW009(-50), ABL-
SW009(+50), ABL-SW008,
ABL-SW008(+100)
11 11 0 0 0.1 0.1 No COPEC: EPC<ESV
Lead 7439-92-1 mg/L 0.00112 See Notes 0.0026 0.0026 23 1 22 0.0025 0.0025 ABL-SW008 0.0026 0.0025 1 23 2.3 2.2 Category 1/5: Max EPC>ESV
Magnesium 7439-95-4 mg/L 82 USEPA R4 5.1 4.9 4 4 0 0.033 0.033 ABL-SW009(+50)5.1 5 0 0 0.1 0.1 No COPEC: EPC<ESV
Polychlorinated biphenyls (PCBs)
Dichlorobiphenyl, 2,2'- (PCB 4)13029-08-8 mg/L ----3.6E-07 3.6E-07 5 1 4 2.5E-07 3E-07 ABL-SW008 3.57E-07 2.8E-07 0 0 ---- Category 3: No ESV & Detect
Dichlorobiphenyl, 2,4'- (PCB 8)34883-43-7 mg/L ----3.3E-07 3.3E-07 5 1 4 2.5E-07 3E-07 ABL-SW008 3.31E-07 2.7E-07 0 0 ---- Category 3: No ESV & Detect
Dichlorobiphenyl, 4,4'- (PCB 15)2050-68-2 mg/L ----9.6E-07 9.6E-07 5 1 4 3.3E-07 4E-07 ABL-SW008 9.59E-07 4.7E-07 0 0 ---- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',4- (PCB 17)37680-66-3 mg/L ----6.9E-07 6.9E-07 5 1 4 2.5E-07 3E-07 ABL-SW008 6.94E-07 3.5E-07 0 0 ---- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',6- (PCB 19)38444-73-4 mg/L ----2.9E-07 2.9E-07 5 1 4 2.5E-07 3E-07 ABL-SW008 2.89E-07 2.7E-07 0 0 ---- Category 3: No ESV & Detect
PCB 20/28 E52450582 mg/L ----1.4E-06 1.4E-06 4 1 3 1.3E-06 1E-06 ABL-SW008 1.45E-06 1.4E-06 0 0 ---- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,4',6- (PCB 32)38444-77-8 mg/L ----5.2E-07 5.2E-07 5 1 4 2.5E-07 3E-07 ABL-SW008 5.19E-07 3.1E-07 0 0 ---- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42)36559-22-5 mg/L ----6.2E-07 6.2E-07 5 1 4 5E-07 6E-07 ABL-SW008 6.15E-07 5.4E-07 0 0 ---- Category 3: No ESV & Detect
PCB 44/47/65 E52450624 mg/L ----2.9E-06 2.9E-06 4 1 3 1.5E-06 2E-06 ABL-SW008 2.92E-06 1.9E-06 0 0 ---- Category 3: No ESV & Detect
PCB 49/69 E52450640 mg/L ----1.8E-06 1.8E-06 4 1 3 1E-06 1E-06 ABL-SW008 1.77E-06 1.2E-06 0 0 ---- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52)35693-99-3 mg/L ----2.2E-06 2.2E-06 5 1 4 1.5E-06 2E-06 ABL-SW008 2.21E-06 1.7E-06 0 0 ---- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56)41464-43-1 mg/L ----1.3E-06 1.3E-06 5 1 4 5E-07 6E-07 ABL-SW008 1.27E-06 6.7E-07 0 0 ---- Category 3: No ESV & Detect
PCB 61/70/74/76 E52450673 mg/L ----3.8E-06 3.8E-06 4 1 3 2E-06 2E-06 ABL-SW008 3.79E-06 2.5E-06 0 0 ---- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64)52663-58-8 mg/L ----1.1E-06 1.1E-06 5 1 4 5E-07 6E-07 ABL-SW008 1.06E-06 6.3E-07 0 0 ---- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66)32598-10-0 mg/L ----3.2E-06 3.2E-06 5 1 4 8.4E-07 9E-07 ABL-SW008 3.19E-06 1.3E-06 0 0 ---- Category 3: No ESV & Detect
PCB 90/101/113 E52450723 mg/L ----1.7E-06 1.7E-06 4 1 3 1.5E-06 2E-06 ABL-SW008 1.74E-06 1.6E-06 0 0 ---- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95)38379-99-6 mg/L ----1.3E-06 1.3E-06 5 1 4 9.5E-07 1E-06 ABL-SW008 1.25E-06 1E-06 0 0 ---- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99)38380-01-7 mg/L ----1.4E-06 1.4E-06 5 1 4 5E-07 6E-07 ABL-SW008 1.39E-06 7E-07 0 0 ---- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105)32598-14-4 mg/L ----9E-07 9E-07 5 1 4 5E-07 6E-07 ABL-SW008 8.97E-07 6E-07 0 0 ---- Category 3: No ESV & Detect
PCB 110/115 E52450756 mg/L ----2.3E-06 2.3E-06 4 1 3 1E-06 1E-06 ABL-SW008 2.34E-06 1.4E-06 0 0 ---- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118)31508-00-6 mg/L ----1.7E-06 1.7E-06 5 1 4 6.4E-07 7E-07 ABL-SW008 1.74E-06 8.8E-07 0 0 ---- Category 3: No ESV & Detect
Total PCBs (Congeners)totPCB_congener_ND=0 mg/L 0.000001 NCDEQ 3.1E-05 3.1E-05 5 1 4 0.00011 0.0002 ABL-SW008 0.0001745 6.2E-06 1 1 174.5 6.2 Category 1/5: Max EPC>ESV
Total PCBs (Congeners)totPCB_congener_ND=QL/2 mg/L 0.000001 NCDEQ 8E-05 8E-05 5 1 4 0.00011 0.0002 ABL-SW008 0.0001745 6.7E-05 5 5 174.5 67.3 Category 1/5: Max EPC>ESV
Total PCBs (Congeners)totPCB_congener_ND=LOD mg/L 0.000001 NCDEQ 0.00013 0.00013 5 1 4 0.00011 0.0002 ABL-SW008 0.0001745 0.00013 5 5 174.5 128.4 Category 1/5: Max EPC>ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Benzo[a]anthracene 56-55-3 mg/L 0.0022 See Notes 0.0053 0.0053 5 1 4 0.00018 0.0018 ABL-SW008 0.0053 0.00174 1 1 2.4 0.8 Category 1/5: Max EPC>ESV
Benzo[a]pyrene 50-32-8 mg/L 0.00096 See Notes 0.0013 0.0013 5 1 4 0.00016 0.0021 ABL-SW008 0.0021 0.001 1 2 2.2 1.0 Category 1/5: Max EPC>ESV
Benzo[b]fluoranthene 205-99-2 mg/L 0.00068 See Notes 0.0015 0.0015 5 1 4 0.00019 0.0019 ABL-SW008 0.0019 0.00104 1 4 2.8 1.5 Category 1/5: Max EPC>ESV
UnitsChemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
1 of 3
Table 6
Summary Surface Water Screening - Detections in Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*Total
Samples Detects Non-
Detects Min Max Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
Benzo[k]fluoranthene 207-08-9 mg/L 0.00064 See Notes 0.0017 0.0017 5 1 4 0.00043 0.0019 ABL-SW008 0.0019 0.0012 1 5 3.0 1.9 Category 1/5: Max EPC>ESV
Chrysene 218-01-9 mg/L 0.002 See Notes 0.0057 0.0057 5 1 4 0.00017 0.0017 ABL-SW008 0.0057 0.00177 1 1 2.9 0.9 Category 1/5: Max EPC>ESV
Pyrene 129-00-0 mg/L 0.01 See Notes 0.0012 0.0012 5 1 4 0.00019 0.0021 ABL-SW008 0.0021 0.00091 0 0 0.2 0.1 No COPEC: EPC<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/L ----0.0167 0.0167 5 1 4 0.00214 0.0161 ABL-SW008 0.0167 0.00334 0 0 ---- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/L ----0.01731 0.01731 5 1 4 0.00214 0.0161 ABL-SW008 0.01731 0.00684 0 0 ---- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=LOD mg/L ----0.01792 0.01792 5 1 4 0.00214 0.0161 ABL-SW008 0.01792 0.01034 0 0 ---- Category 3: No ESV & Detect
Other Semi-Volatile Organic Compounds (SVOCs)
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 0.003 0.003 3 1 2 0.0012 0.0021 ABL-SW008 0.003 0.0018 0 0 0.3 0.2 No COPEC: EPC<ESV
4-Nitrophenol 100-02-7 mg/L 0.058 USEPA R4 0.0098 0.0098 4 1 3 0.0035 0.0058 ABL-SW008 0.0098 0.00623 0 0 0.2 0.1 No COPEC: EPC<ESV
Benzyl Butyl Phthalate 85-68-7 mg/L 0.019 NCDEQ 0.0061 0.0061 4 1 3 0.00075 0.0016 ABL-SW008 0.0061 0.0023 0 0 0.3 0.1 No COPEC: EPC<ESV
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/L 0.005 NCDEQ 0.0048 0.0024 4 2 2 0.00079 0.0021 ABL-SW008 0.0048 0.00223 0 0 1.0 0.4 No COPEC: EPC<ESV
Di-N-Octylphthalate 117-84-0 mg/L 0.215 USEPA R4 0.0019 0.0019 4 1 3 0.00066 0.0018 ABL-SW008 0.0019 0.00136 0 0 0.0 0.0 No COPEC: EPC<ESV
Phenol 108-95-2 mg/L 0.16 USEPA R4 0.009 0.009 5 1 4 0.00091 0.005 ABL-SW008 0.009 0.00304 0 0 0.1 0.0 No COPEC: EPC<ESV
General Chemistry
Alkalinity, Bicarbonate (As CaCO3)ALKB mg/L ----42 41 4 4 0 5 5 ABL-SW009(+50), ABL-
SW008 42 41.5 0 0 ---- Category 3: No ESV & Detect
Alkalinity, Total (As CaCO3)ALK mg/L 20 USEPA R4 42 41 4 4 0 5 5
ABL-SW009(+50), ABL-
SW008, ABL-
SW008(+100)
42 41.75 4 4 2.1 2.1 Category 1/5: Max EPC>ESV
Bromide 24959-67-9 mg/L ----0.41 0.41 4 1 3 0.4 0.4 ABL-SW009(-50)0.41 0.4025 0 0 ---- Category 3: No ESV & Detect
Chloride (As Cl)16887-00-6 mg/L 230 NCDEQ 6.2 5.5 8 8 0 0.18 0.4 ABL-SW009(-50)6.2 5.8125 0 0 0.0 0.0 No COPEC: EPC<ESV
Hardness (As CaCO3)HARD mg/L ----48 47 4 4 0 3.3 3.3
ABL-SW009(+50), ABL-
SW008, ABL-
SW008(+100)
48 47.75 0 0 ---- Category 3: No ESV & Detect
pH PH SU 20 USEPA R4 7.6 7.5 4 4 0 ----ABL-SW008 7.6 7.525 0 0 0.4 0.4 No COPEC: EPC<ESV
Sulfate (As SO4)14808-79-8 mg/L ----6.3 4.4 4 4 0 0.8 0.8 ABL-SW008(+100)6.3 5.05 0 0 ---- Category 3: No ESV & Detect
Total Hardness TOTHARD mg/L ----37.8 15.4 20 20 0 0.662 0.662 ABL-SW008 37.8 22.155 0 0 ---- Category 3: No ESV & Detect
2 of 3
Table 6
Summary Surface Water Screening - Detections in Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
3 of 3
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
Table 7
Summary Sediment Screening - Detections in Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*Total
Samples Detects Non-
Detects Min Max Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 0.54 0.17 2 2 0 0.11 0.17 ABL-SD001 0.54 0.355 0 0 -- -- Category 3: No ESV & Detect
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 14.9 8.4 2 2 0 0.33 0.37 ABL-SD002 14.9 11.65 0 0 0.5 0.4 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 58.4 33.1 2 2 0 0.17 0.18 ABL-SD002 58.4 45.75 0 0 1.0 0.8 No COPEC: EPC<ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.23 0.16 2 2 0 0.033 0.037 ABL-SD002 0.23 0.195 0 0 0.0 0.0 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 79.5 66.7 2 2 0 0.17 0.18 ABL-SD002 79.5 73.1 0 0 0.7 0.7 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 20 12.7 2 2 0 0.17 0.18 ABL-SD002 20 16.35 0 0 0.2 0.1 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.014 0.0087 2 2 0 0.0001 0.00011 ABL-SD002 0.014 0.01135 0 0 0.0 0.0 No COPEC: EPC<ESV
Silver 7440-22-4 mg/kg 2.2 EPA R4 RSV 0.59 0.42 2 2 0 0.17 0.18 ABL-SD002 0.59 0.505 0 0 0.3 0.2 No COPEC: EPC<ESV
Polychlorinated biphenyls (PCBs)
PCB 20/28 E52450582 mg/kg -- -- 0.0002 0.00017 1 1 0 0.000125 0.000125 ABL-SD007 0.000165 0.000165 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,4',5- (PCB 31)16606-02-3 mg/kg -- -- 0.0002 0.00018 1 1 0 0.000126 0.000126 ABL-SD007 0.00018 0.00018 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,4',6- (PCB 32)38444-77-8 mg/kg -- -- 3E-05 2.6E-05 1 1 0 2.43E-05 2.43E-05 ABL-SD007 0.0000257 2.57E-05 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 3,4,4'- (PCB 37)38444-90-5 mg/kg -- -- 8E-05 8.2E-05 1 1 0 5.15E-05 5.15E-05 ABL-SD007 0.0000818 8.18E-05 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42)36559-22-5 mg/kg -- -- 7E-05 6.7E-05 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.0000666 6.66E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 44/47/65 E52450624 mg/kg -- -- 0.0002 0.00022 1 1 0 0.000146 0.000146 ABL-SD007 0.000215 0.000215 0 0 -- -- Category 3: No ESV & Detect
PCB 49/69 E52450640 mg/kg -- -- 0.0002 0.00016 1 1 0 9.71E-05 9.71E-05 ABL-SD007 0.000161 0.000161 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52)35693-99-3 mg/kg -- -- 0.0002 0.00025 1 1 0 0.00015 0.00015 ABL-SD007 0.000249 0.000249 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56)41464-43-1 mg/kg -- -- 0.0002 0.00023 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.000226 0.000226 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60)33025-41-1 mg/kg -- -- 0.0001 0.00014 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.00014 0.00014 0 0 -- -- Category 3: No ESV & Detect
PCB 61/70/74/76 E52450673 mg/kg -- -- 0.0009 0.00089 1 1 0 0.000194 0.000194 ABL-SD007 0.000886 0.000886 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64)52663-58-8 mg/kg -- -- 0.0002 0.00018 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.00018 0.00018 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66)32598-10-0 mg/kg -- -- 0.0005 0.00047 1 1 0 8.15E-05 8.15E-05 ABL-SD007 0.000468 0.000468 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77)32598-13-3 mg/kg -- -- 0.0001 0.00011 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.000105 0.000105 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82)52663-62-4 mg/kg -- -- 5E-05 5.1E-05 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.0000513 5.13E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 90/101/113 E52450723 mg/kg -- -- 0.0002 0.00019 1 1 0 0.000146 0.000146 ABL-SD007 0.000191 0.000191 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95)38379-99-6 mg/kg -- -- 0.0001 0.00011 1 1 0 9.22E-05 9.22E-05 ABL-SD007 0.000106 0.000106 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99)38380-01-7 mg/kg -- -- 0.0001 0.00013 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.000129 0.000129 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105)32598-14-4 mg/kg -- -- 0.0002 0.00023 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.000232 0.000232 0 0 -- -- Category 3: No ESV & Detect
PCB 110/115 E52450756 mg/kg -- -- 0.0003 0.00034 1 1 0 9.71E-05 9.71E-05 ABL-SD007 0.000335 0.000335 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118)31508-00-6 mg/kg -- -- 0.0004 0.00035 1 1 0 6.21E-05 6.21E-05 ABL-SD007 0.000354 0.000354 0 0 -- -- Category 3: No ESV & Detect
PCB 129/138/163 (129/138/163) mg/kg -- -- 0.0002 0.00025 1 1 0 0.000146 0.000146 ABL-SD007 0.000249 0.000249 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132)38380-05-1 mg/kg -- -- 6E-05 5.6E-05 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.0000556 5.56E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 147/149 E52450814 mg/kg -- -- 0.0002 0.00016 1 1 0 9.71E-05 9.71E-05 ABL-SD007 0.000161 0.000161 0 0 -- -- Category 3: No ESV & Detect
PCB 153/168 E52450822 mg/kg -- -- 0.0002 0.0002 1 1 0 9.71E-05 9.71E-05 ABL-SD007 0.000196 0.000196 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170)35065-30-6 mg/kg -- -- 6E-05 6.5E-05 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.0000649 6.49E-05 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174)38411-25-5 mg/kg -- -- 8E-05 8.2E-05 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.0000822 8.22E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 180/193 E52450855 mg/kg -- -- 0.0002 0.00017 1 1 0 9.71E-05 9.71E-05 ABL-SD007 0.000165 0.000165 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances
Hazard
Quotients COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
1 of 2
Table 7
Summary Sediment Screening - Detections in Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*Total
Samples Detects Non-
Detects Min Max Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances
Hazard
Quotients COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187)52663-68-0 mg/kg -- -- 0.0001 0.0001 1 1 0 4.85E-05 4.85E-05 ABL-SD007 0.000101 0.000101 0 0 -- -- Category 3: No ESV & Detect
Total PCBs (Congeners)totPCB_congener_ND=0 mg/kg 0.676 EPA R4 RSV 0.0056 0.00562 1 1 0 0.010355 0.010355 ABL-SD007 0.0103554 0.005622 0 0 0.0 0.0 No COPEC: EPC<ESV
Total PCBs (Congeners)totPCB_congener_ND=QL/2 mg/kg 0.676 EPA R4 RSV 0.0096 0.00959 1 1 0 0.010355 0.010355 ABL-SD007 0.0103554 0.009594 0 0 0.0 0.0 No COPEC: EPC<ESV
Total PCBs (Congeners)totPCB_congener_ND=LOD mg/kg 0.676 EPA R4 RSV 0.0136 0.01357 1 1 0 0.010355 0.010355 ABL-SD007 0.0135654 0.013565 0 0 0.0 0.0 No COPEC: EPC<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 14.6 11.2 3 3 0 0.1 0.1 ABL-SD001 14.6 12.83333 0 0 -- -- Category 3: No ESV & Detect
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
RSV - Refined screening value
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
2 of 2
Table 8
Summary Surface Water Screening - Detections in Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 0.082 0.061 8 3 5 0.05 0.25 ABL-SW012 0.25 0.10425 0 0 0.1 0.1 No COPEC: EPC<ESV
Metals
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.01 0.01 1 1 0 0.0025 0.0025 ABL-SW003 0.01 0.01 0 0 0.0 0.0 No COPEC: EPC<ESV
Calcium 7440-70-2 mg/L 116 USEPA R4 11 11 1 1 0 0.025 0.025 ABL-SW012 11 11 0 0 0.1 0.1 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/L 0.0406 See Notes 0.0033 0.0033 2 1 1 0.0025 0.0025 ABL-SW003 0.0033 0.0029 0 0 0.1 0.1 No COPEC: EPC<ESV
Magnesium 7439-95-4 mg/L 82 USEPA R4 5.2 5.2 1 1 0 0.033 0.033 ABL-SW012 5.2 5.2 0 0 0.1 0.1 No COPEC: EPC<ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Naphthalene 91-20-3 mg/L 0.194 See Notes 0.0011 0.0011 2 1 1 0.00033 0.0015 ABL-SW012 0.0015 0.0013 0 0 0.0 0.0 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=0 mg/L -- -- 0.0011 0.0011 2 1 1 0.00151 0.00957 ABL-SW012 0.00957 0.00055 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/L -- -- 0.0017 0.0017 2 1 1 0.00151 0.00957 ABL-SW012 0.00957 0.003238 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=LOD mg/L -- -- 0.0023 0.0023 2 1 1 0.00151 0.00957 ABL-SW012 0.00957 0.005925 0 0 -- -- Category 3: No ESV & Detect
Other Semi-Volatile Organic Compounds (SVOCs)
Phenol 108-95-2 mg/L 0.16 USEPA R4 0.0064 0.0064 3 1 2 0.0017 0.005 ABL-SW012 0.0064 0.0033 0 0 0.0 0.0 No COPEC: EPC<ESV
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB mg/L -- -- 43 43 1 1 0 5 5 ABL-SW012 43 43 0 0 -- -- Category 3: No ESV & Detect
Alkalinity, Total (As CaCO3) ALK mg/L 20 USEPA R4 44 44 1 1 0 5 5 ABL-SW012 44 44 1 1 2.2 2.2 Category 1/5: Max EPC>ESV
Chloride (As Cl) 16887-00-6 mg/L 230 NCDEQ 6.8 6 2 2 0 0.18 0.4 ABL-SW012 6.8 6.4 0 0 0.0 0.0 No COPEC: EPC<ESV
Hardness (As CaCO3) HARD mg/L -- -- 50 50 1 1 0 3.3 3.3 ABL-SW012 50 50 0 0 -- -- Category 3: No ESV & Detect
pH PH SU 20 USEPA R4 7.4 7.4 1 1 0 -- -- ABL-SW012 7.4 7.4 0 0 0.4 0.4 No COPEC: EPC<ESV
Sulfate (As SO4) 14808-79-8 mg/L -- -- 4.4 4.4 1 1 0 0.8 0.8 ABL-SW012 4.4 4.4 0 0 -- -- Category 3: No ESV & Detect
Total Hardness TOTHARD mg/L -- -- 39.2 16 5 5 0 0.662 0.662 ABL-SW012 39.2 23.02 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
1 of 2
Table 8
Summary Surface Water Screening - Detections in Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
2 of 2
Table 9
Summary Sediment Screening - Detections in Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 0.13 0.13 1 1 0 0.062 0.062 ABL-SD003 0.13 0.13 0 0 -- -- Category 3: No ESV & Detect
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 6.5 6.5 1 1 0 0.35 0.35 ABL-SD003 6.5 6.5 0 0 0.2 0.2 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 89.3 89.3 1 1 0 0.17 0.17 ABL-SD003 89.3 89.3 1 1 1.5 1.5 Category 1: Max EPC>ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.17 0.17 1 1 0 0.035 0.035 ABL-SD003 0.17 0.17 0 0 0.0 0.0 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 108 108 1 1 0 0.17 0.17 ABL-SD003 108 108 0 0 1.0 1.0 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 18.4 18.4 1 1 0 0.17 0.17 ABL-SD003 18.4 18.4 0 0 0.1 0.1 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.01 0.01 1 1 0 0.000099 0.000099 ABL-SD003 0.01 0.01 0 0 0.0 0.0 No COPEC: EPC<ESV
Silver 7440-22-4 mg/kg 2.2 EPA R4 RSV 0.49 0.49 1 1 0 0.17 0.17 ABL-SD003 0.49 0.49 0 0 0.2 0.2 No COPEC: EPC<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 22.6 13.9 2 2 0 0.1 0.1 ABL-SD008 22.6 18.25 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
1 of 2
Table 9
Summary Sediment Screening - Detections in Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
RSV - Refined screening value
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
2 of 2
Table 10
Summary Surface Water Screening - Detections in Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/L 0.005 NCDEQ 0.078 0.014 13 13 0 0.002 0.004 ABL-SW013 0.078 0.054385 13 13 15.6 10.9 Category 1/5: Max EPC>ESV
Cyanide, Available 57-12-5_AVAIL mg/L 0.005 NCDEQ 0.0086 0.0008 6 5 1 0.0003 0.0015 ABL-SW014 0.0086 0.00435 2 2 1.7 0.9 Category 1/5: Max EPC>ESV
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 23.8 0.52 11 11 0 0.04 5 ABL-ML003 23.8 5.013636 6 6 13.2 2.8 Category 1/5: Max EPC>ESV
Metals
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0276 0.0236 2 2 0 0.0025 0.0025 ABL-SW006 0.0276 0.0256 0 0 0.1 0.1 No COPEC: EPC<ESV
Calcium 7440-70-2 mg/L 116 USEPA R4 26 21 3 3 0 0.025 0.025 ABL-SW013 26 23 0 0 0.2 0.2 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/L 0.07229 See Notes 0.0039 0.0039 2 1 1 0.0025 0.0025 ABL-SW006 0.0039 0.0032 0 0 0.1 0.0 No COPEC: EPC<ESV
Lead 7439-92-1 mg/L 0.00243 See Notes 0.0037 0.0037 2 1 1 0.0025 0.0025 ABL-SW006 0.0037 0.0031 1 2 1.5 1.3 Category 1/5: Max EPC>ESV
Magnesium 7439-95-4 mg/L 82 USEPA R4 12 7.4 3 3 0 0.033 0.033 ABL-SW013 12 10.13333 0 0 0.1 0.1 No COPEC: EPC<ESV
Polychlorinated biphenyls (PCBs)
PCB 49/69 E52450640 mg/L -- -- 0.00000106 0.00000106 3 1 2 1E-06 1.1E-06 ABL-SW013 0.00000107 1.06E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 mg/L -- -- 0.00000167 0.00000167 3 1 2 1.6E-06 1.7E-06 ABL-SW013 0.00000167 1.64E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 mg/L -- -- 0.00000059 0.00000059 3 1 2 5.2E-07 5.4E-07 ABL-SW013 0.00000059 5.48E-07 0 0 -- -- Category 3: No ESV & Detect
PCB 61/70/74/76 E52450673 mg/L -- -- 0.00000225 0.00000225 3 1 2 2.1E-06 2.1E-06 ABL-SW013 0.00000225 2.15E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 mg/L -- -- 0.000000776 0.000000603 3 3 0 5.2E-07 5.4E-07 ABL-SW013 0.000000776 7.13E-07 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 mg/L -- -- 0.00000146 0.00000108 3 3 0 8.7E-07 9E-07 ABL-SW013 0.00000146 1.31E-06 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 mg/L -- -- 0.000000655 0.000000639 3 2 1 5.2E-07 5.4E-07 ABL-SW013 0.000000655 6.04E-07 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 mg/L -- -- 0.000000588 0.000000588 3 1 2 5.2E-07 5.4E-07 ABL-SW013 0.000000588 5.47E-07 0 0 -- -- Category 3: No ESV & Detect
PCB 110/115 E52450756 mg/L -- -- 0.0000014 0.00000119 3 2 1 1E-06 1.1E-06 ABL-SW013 0.0000014 1.21E-06 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 mg/L -- -- 0.00000104 0.000000864 3 2 1 6.6E-07 6.9E-07 ABL-SW013 0.00000104 8.56E-07 0 0 -- -- Category 3: No ESV & Detect
PCB 147/149 E52450814 mg/L -- -- 0.00000117 0.00000117 3 1 2 1E-06 1.1E-06 ABL-SW014 0.00000117 1.09E-06 0 0 -- -- Category 3: No ESV & Detect
PCB 153/168 E52450822 mg/L -- -- 0.0000014 0.00000131 3 2 1 1E-06 1.1E-06 ABL-SW014 0.0000014 1.25E-06 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 mg/L -- -- 0.000000648 0.000000569 3 2 1 5.2E-07 5.4E-07 ABL-SW014 0.000000648 5.78E-07 0 0 -- -- Category 3: No ESV & Detect
PCB 180/193 E52450855 mg/L -- -- 0.00000133 0.00000117 3 2 1 1E-06 1.1E-06 ABL-SW014 0.00000133 1.18E-06 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 mg/L -- -- 0.000000806 0.000000526 3 3 0 5.2E-07 5.4E-07 ABL-SW014 0.000000806 6.75E-07 0 0 -- -- Category 3: No ESV & Detect
Total PCBs (Congeners) totPCB_congener_ND=0 mg/L 0.000001 NCDEQ 0.000015232 0.000002209 3 3 0 0.00011 0.00011 ABL-SW013 0.00011408 9.21E-06 3 3 114.1 9.2 Category 1/5: Max EPC>ESV
Total PCBs (Congeners) totPCB_congener_ND=QL/2 mg/L 0.000001 NCDEQ 0.000064751 0.000056534 3 3 0 0.00011 0.00011 ABL-SW013 0.00011408 6.15E-05 3 3 114.1 61.5 Category 1/5: Max EPC>ESV
Total PCBs (Congeners) totPCB_congener_ND=LOD mg/L 0.000001 NCDEQ 0.000116275 0.000110859 3 3 0 0.00011 0.00011 ABL-SW014 0.000116275 0.000114 3 3 116.3 113.8 Category 1/5: Max EPC>ESV
Volatile Organic Compounds (VOCs)
Acetone 67-64-1 mg/L 2 NCDEQ 0.01 0.01 2 1 1 0.01 0.01 ABL-ML003 0.01 0.01 0 0 0.0 0.0 No COPEC: EPC<ESV
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB mg/L -- -- 170 150 3 3 0 5 5 ABL-SW014 170 160 0 0 -- -- Category 3: No ESV & Detect
Alkalinity, Total (As CaCO3) ALK mg/L 20 USEPA R4 170 150 3 3 0 5 5 ABL-SW014 170 160 3 3 8.5 8.0 Category 1/5: Max EPC>ESV
Bromide 24959-67-9 mg/L -- -- 0.21 0.21 3 2 1 0.2 0.4 ABL-SW013,
ABL-SW014 0.4 0.273333 0 0 -- -- Category 3: No ESV & Detect
Chloride (As Cl) 16887-00-6 mg/L 230 NCDEQ 12 6.9 6 6 0 0.18 0.4 ABL-SW014 12 9.966667 0 0 0.1 0.0 No COPEC: EPC<ESV
Hardness (As CaCO3) HARD mg/L -- -- 110 83 3 3 0 3.3 3.3 ABL-SW013 110 97.66667 0 0 -- -- Category 3: No ESV & Detect
pH PH SU 20 USEPA R4 7.3 7 3 3 0 -- -- ABL-SW013 7.3 7.133333 0 0 0.4 0.4 No COPEC: EPC<ESV
Sulfate (As SO4) 14808-79-8 mg/L -- -- 69 24 3 3 0 0.4 0.8 ABL-SW014 69 53.33333 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count
Quantitation
Limits Location of
Max
Values for Screening
1 of 2
Table 10
Summary Surface Water Screening - Detections in Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
2 of 2
Table 11
Summary Sediment Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 1.4 1.4 1 1 0 0.45 0.45 ABL-SD006 1.4 1.4 0 0 -- -- Category 3: No ESV & Detect
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 12.4 12.4 1 1 0 0.88 0.88 ABL-SD006 12.4 12.4 0 0 0.4 0.4 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 85.8 85.8 1 1 0 0.44 0.44 ABL-SD006 85.8 85.8 1 1 1.4 1.4 Category 1: Max EPC>ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.19 0.19 1 1 0 0.088 0.088 ABL-SD006 0.19 0.19 0 0 0.0 0.0 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 20.4 20.4 1 1 0 0.44 0.44 ABL-SD006 20.4 20.4 0 0 0.2 0.2 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 21.7 21.7 1 1 0 0.44 0.44 ABL-SD006 21.7 21.7 0 0 0.2 0.2 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.024 0.024 1 1 0 0.00019 0.00019 ABL-SD006 0.024 0.024 0 0 0.0 0.0 No COPEC: EPC<ESV
Polychlorinated biphenyls (PCBs)
Dichlorobiphenyl, 2,2'- (PCB 4)13029-08-8 mg/kg -- -- 0.0002 6.7E-05 3 2 1 0.000025 0.000025 ABL-SD011 0.000159 8.36E-05 0 0 -- -- Category 3: No ESV & Detect
Dichlorobiphenyl, 2,3'- (PCB 6)25569-80-6 mg/kg -- -- 3E-05 3.3E-05 3 1 2 0.000025 0.000025 ABL-SD011 0.000033 2.77E-05 0 0 -- -- Category 3: No ESV & Detect
Dichlorobiphenyl, 2,4'- (PCB 8)34883-43-7 mg/kg -- -- 0.0003 0.00011 3 2 1 0.000025 0.000025 ABL-SD011 0.000316 0.00015 0 0 -- -- Category 3: No ESV & Detect
Dichlorobiphenyl, 4,4'- (PCB 15)2050-68-2 mg/kg -- -- 0.0001 6.5E-05 3 2 1 0.000033 0.000033 ABL-SD011 0.000101 6.64E-05 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',3- (PCB 16)38444-78-9 mg/kg -- -- 0.0002 0.00017 3 1 2 0.000025 0.000025 ABL-SD011 0.000165 7.17E-05 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',4- (PCB 17)37680-66-3 mg/kg -- -- 0.0003 0.0001 3 2 1 0.000025 0.000025 ABL-SD011 0.000289 0.000139 0 0 -- -- Category 3: No ESV & Detect
PCB 18/30 E52450574 mg/kg -- -- 0.0002 0.00018 3 1 2 0.00005 0.00005 ABL-SD011 0.000179 0.000093 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',6- (PCB 19)38444-73-4 mg/kg -- -- 0.0001 0.00011 3 1 2 0.000025 0.000025 ABL-SD011 0.000105 5.17E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 20/28 E52450582 mg/kg -- -- 0.0015 0.00054 3 2 1 0.000129 0.000129 ABL-SD011 0.00148 0.000715 0 0 -- -- Category 3: No ESV & Detect
PCB 21/33 E52450590 mg/kg -- -- 0.0005 0.00052 3 1 2 0.000135 0.000135 ABL-SD011 0.00052 0.000263 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,3,4'- (PCB 22)38444-85-8 mg/kg -- -- 0.0004 0.00037 3 1 2 0.000095 0.000095 ABL-SD011 0.000369 0.000186 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,3',4- (PCB 25)55712-37-3 mg/kg -- -- 4E-05 4.2E-05 3 1 2 0.000025 0.000025 ABL-SD011 0.0000421 3.07E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 26/29 E52450608 mg/kg -- -- 0.0001 0.00012 3 1 2 0.00005 0.00005 ABL-SD011 0.000123 7.43E-05 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,3',6- (PCB 27)38444-76-7 mg/kg -- -- 4E-05 4.2E-05 3 1 2 0.000025 0.000025 ABL-SD011 0.0000423 3.08E-05 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,4',5- (PCB 31)16606-02-3 mg/kg -- -- 0.0013 0.00035 3 2 1 0.00013 0.00013 ABL-SD011 0.00132 0.000601 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,4',6- (PCB 32)38444-77-8 mg/kg -- -- 0.0003 8.2E-05 3 2 1 0.000025 0.000025 ABL-SD011 0.000278 0.000128 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 3,4,4'- (PCB 37)38444-90-5 mg/kg -- -- 0.0005 0.00011 3 2 1 0.000053 0.000053 ABL-SD011 0.00049 0.000218 0 0 -- -- Category 3: No ESV & Detect
PCB 40/41/71 E52450616 mg/kg -- -- 0.0012 0.00033 3 2 1 0.00015 0.00015 ABL-SD011 0.00124 0.000575 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42)36559-22-5 mg/kg -- -- 0.0007 0.00018 3 2 1 0.00005 0.00005 ABL-SD011 0.000733 0.000321 0 0 -- -- Category 3: No ESV & Detect
PCB 43/73 (43/73)mg/kg -- -- 7E-05 7.5E-05 3 1 2 0.00005 0.00005 ABL-SD011 0.0000749 5.83E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 44/47/65 E52450624 mg/kg -- -- 0.0024 0.00072 3 2 1 0.00015 0.00015 ABL-SD011 0.00244 0.001102 0 0 -- -- Category 3: No ESV & Detect
PCB 45/51 E52450632 mg/kg -- -- 0.0004 0.00011 3 2 1 0.0001 0.0001 ABL-SD011 0.000387 0.000199 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46)41464-47-5 mg/kg -- -- 0.0001 0.00012 3 1 2 0.00005 0.00005 ABL-SD011 0.000118 7.27E-05 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48)70362-47-9 mg/kg -- -- 0.0005 0.00012 3 2 1 0.00005 0.00005 ABL-SD011 0.000458 0.00021 0 0 -- -- Category 3: No ESV & Detect
PCB 49/69 E52450640 mg/kg -- -- 0.0018 0.00057 3 2 1 0.0001 0.0001 ABL-SD011 0.00176 0.000811 0 0 -- -- Category 3: No ESV & Detect
PCB 50/53 E52450657 mg/kg -- -- 0.0004 0.00011 3 2 1 0.0001 0.0001 ABL-SD011 0.000361 0.000192 0 0 -- -- Category 3: No ESV & Detect
Chemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
Units
1 of 5
Table 11
Summary Sediment Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Chemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
Units
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52)35693-99-3 mg/kg -- -- 0.0028 0.00082 3 2 1 0.000154 0.000154 ABL-SD011 0.00277 0.001248 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56)41464-43-1 mg/kg -- -- 0.0016 0.00038 3 2 1 0.00005 0.00005 ABL-SD011 0.00158 0.00067 0 0 -- -- Category 3: No ESV & Detect
PCB 59/62/75 E52450665 mg/kg -- -- 0.0002 0.00021 3 1 2 0.00015 0.00015 ABL-SD011 0.000207 0.000169 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60)33025-41-1 mg/kg -- -- 0.001 0.00018 3 2 1 0.00005 0.00005 ABL-SD011 0.000979 0.000402 0 0 -- -- Category 3: No ESV & Detect
PCB 61/70/74/76 E52450673 mg/kg -- -- 0.0061 0.00156 3 2 1 0.0002 0.0002 ABL-SD011 0.00605 0.002603 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63)74472-34-7 mg/kg -- -- 0.0002 5.2E-05 3 2 1 0.00005 0.00005 ABL-SD011 0.000172 9.12E-05 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64)52663-58-8 mg/kg -- -- 0.0015 0.00043 3 2 1 0.00005 0.00005 ABL-SD011 0.00146 0.000645 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66)32598-10-0 mg/kg -- -- 0.0039 0.00104 3 2 1 0.000084 0.000084 ABL-SD011 0.00387 0.001665 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67)73575-53-8 mg/kg -- -- 6E-05 6.3E-05 3 1 2 0.00005 0.00005 ABL-SD011 0.0000634 5.45E-05 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77)32598-13-3 mg/kg -- -- 0.0005 9.7E-05 3 2 1 0.00005 0.00005 ABL-SD011 0.000534 0.000227 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82)52663-62-4 mg/kg -- -- 0.0008 0.0001 3 2 1 0.00005 0.00005 ABL-SD011 0.000797 0.000317 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83)60145-20-2 mg/kg -- -- 0.0004 0.00038 3 1 2 0.00005 0.00005 ABL-SD011 0.000377 0.000159 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84)52663-60-2 mg/kg -- -- 0.0007 0.00015 3 2 1 0.00005 0.00005 ABL-SD011 0.000709 0.000301 0 0 -- -- Category 3: No ESV & Detect
PCB 85/117/116 E52450699 mg/kg -- -- 0.0016 0.00026 3 2 1 0.00015 0.00015 ABL-SD011 0.00157 0.000661 0 0 -- -- Category 3: No ESV & Detect
PCB 86/87/97/108/119/125 E52450707 mg/kg -- -- 0.0035 0.00044 3 2 1 0.0003 0.0003 ABL-SD011 0.00348 0.001406 0 0 -- -- Category 3: No ESV & Detect
PCB 88/91 E52450715 mg/kg -- -- 0.0006 0.00014 3 2 1 0.0001 0.0001 ABL-SD011 0.000612 0.000284 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89)73575-57-2 mg/kg -- -- 9E-05 8.8E-05 3 1 2 0.00005 0.00005 ABL-SD011 0.0000882 6.27E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 90/101/113 E52450723 mg/kg -- -- 0.0062 0.0006 3 2 1 0.00015 0.00015 ABL-SD011 0.00615 0.0023 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92)52663-61-3 mg/kg -- -- 0.0009 0.00012 3 2 1 0.00005 0.00005 ABL-SD011 0.000884 0.000352 0 0 -- -- Category 3: No ESV & Detect
PCB 93/98/100/102 (93/98/100/102) mg/kg -- -- 0.0002 0.00024 3 1 2 0.0002 0.0002 ABL-SD011 0.000239 0.000213 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95)38379-99-6 mg/kg -- -- 0.0023 0.00038 3 2 1 0.000095 0.000095 ABL-SD011 0.00231 0.000928 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99)38380-01-7 mg/kg -- -- 0.0029 0.0005 3 2 1 0.00005 0.00005 ABL-SD011 0.00288 0.001142 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105)32598-14-4 mg/kg -- -- 0.0044 0.00041 3 2 1 0.00005 0.00005 ABL-SD011 0.0044 0.001619 0 0 -- -- Category 3: No ESV & Detect
PCB 107/124 E52450749 mg/kg -- -- 0.0003 0.00031 3 1 2 0.0001 0.0001 ABL-SD011 0.000305 0.000168 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109)74472-35-8 mg/kg -- -- 0.0005 6.1E-05 3 2 1 0.00005 0.00005 ABL-SD011 0.000545 0.000219 0 0 -- -- Category 3: No ESV & Detect
PCB 110/115 E52450756 mg/kg -- -- 0.0053 0.00077 3 2 1 0.0001 0.0001 ABL-SD011 0.00529 0.002053 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114)74472-37-0 mg/kg -- -- 0.0004 0.00039 3 1 2 0.00005 0.00005 ABL-SD011 0.000388 0.000163 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118)31508-00-6 mg/kg -- -- 0.0081 0.00068 3 2 1 0.000064 0.000064 ABL-SD011 0.0081 0.002948 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122)76842-07-4 mg/kg -- -- 0.0002 0.00016 3 1 2 0.00005 0.00005 ABL-SD011 0.000162 8.73E-05 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123)65510-44-3 mg/kg -- -- 0.0003 0.0003 3 1 2 0.00005 0.00005 ABL-SD011 0.000297 0.000132 0 0 -- -- Category 3: No ESV & Detect
PCB 128/166 E52450764 mg/kg -- -- 0.0043 0.00432 3 1 2 0.0001 0.0001 ABL-SD011 0.00432 0.001507 0 0 -- -- Category 3: No ESV & Detect
PCB 129/138/163 (129/138/163)mg/kg -- -- 0.0495 0.00021 3 3 0 0.00015 0.00015 ABL-SD011 0.0495 0.016737 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130)52663-66-8 mg/kg -- -- 0.0012 0.0012 3 1 2 0.00005 0.00005 ABL-SD011 0.0012 0.000433 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131)61798-70-7 mg/kg -- -- 0.0002 0.00021 3 1 2 0.00005 0.00005 ABL-SD011 0.00021 0.000103 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132)38380-05-1 mg/kg -- -- 0.0085 0.00011 3 2 1 0.00005 0.00005 ABL-SD011 0.0085 0.002888 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133)35694-04-3 mg/kg -- -- 0.0005 0.00045 3 1 2 0.00005 0.00005 ABL-SD011 0.00045 0.000183 0 0 -- -- Category 3: No ESV & Detect
2 of 5
Table 11
Summary Sediment Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Chemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
Units
PCB 134/143 E52450780 mg/kg -- -- 0.0012 0.00117 3 1 2 0.0001 0.0001 ABL-SD011 0.00117 0.000457 0 0 -- -- Category 3: No ESV & Detect
PCB 135/151 (135/151)mg/kg -- -- 0.0153 0.00015 3 2 1 0.0001 0.0001 ABL-SD011 0.0153 0.005182 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136)38411-22-2 mg/kg -- -- 0.003 0.00296 3 1 2 0.00005 0.00005 ABL-SD011 0.00296 0.00102 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137)35694-06-5 mg/kg -- -- 0.0004 0.00039 3 1 2 0.00005 0.00005 ABL-SD011 0.000386 0.000162 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141)52712-04-6 mg/kg -- -- 0.0132 7E-05 3 2 1 0.00005 0.00005 ABL-SD011 0.0132 0.00444 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144)68194-14-9 mg/kg -- -- 0.0023 0.00229 3 1 2 0.00005 0.00005 ABL-SD011 0.00229 0.000797 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146)51908-16-8 mg/kg -- -- 0.0062 6.6E-05 3 2 1 0.00005 0.00005 ABL-SD011 0.00615 0.002089 0 0 -- -- Category 3: No ESV & Detect
PCB 147/149 E52450814 mg/kg -- -- 0.0318 0.00029 3 2 1 0.0001 0.0001 ABL-SD011 0.0318 0.010729 0 0 -- -- Category 3: No ESV & Detect
PCB 153/168 E52450822 mg/kg -- -- 0.056 0.00019 3 3 0 0.0001 0.0001 ABL-SD011 0.056 0.018865 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154)60145-22-4 mg/kg -- -- 6E-05 6.1E-05 3 1 2 0.00005 0.00005 ABL-SD011 0.0000614 5.38E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 156/157 E52450830 mg/kg -- -- 0.0038 0.00383 3 1 2 0.0001 0.0001 ABL-SD011 0.00383 0.001343 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158)74472-42-7 mg/kg -- -- 0.004 0.00397 3 1 2 0.00005 0.00005 ABL-SD011 0.00397 0.001357 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159)39635-35-3 mg/kg -- -- 0.0017 0.00168 3 1 2 0.00005 0.00005 ABL-SD011 0.00168 0.000593 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164)74472-45-0 mg/kg -- -- 0.0026 0.00262 3 1 2 0.00005 0.00005 ABL-SD011 0.00262 0.000907 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165)74472-46-1 mg/kg -- -- 0.0002 0.00022 3 1 2 0.00005 0.00005 ABL-SD011 0.000223 0.000108 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167)52663-72-6 mg/kg -- -- 0.0013 0.0013 3 1 2 0.00005 0.00005 ABL-SD011 0.0013 0.000467 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169)32774-16-6 mg/kg -- -- 0 0 3 1 2 0.00005 0.00005
ABL-SD010,
ABL-SD011,0.00005 3.33E-05 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 mg/kg -- -- 0.0436 0.00011 3 2 1 0.00005 0.00005 ABL-SD011 0.0436 0.014587 0 0 -- -- Category 3: No ESV & Detect
PCB 171/173 E52450848 mg/kg -- -- 0.0129 0.0129 3 1 2 0.0001 0.0001 ABL-SD011 0.0129 0.004367 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 mg/kg -- -- 0.0081 0.00807 3 1 2 0.00005 0.00005 ABL-SD011 0.00807 0.002723 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 mg/kg -- -- 0.0461 0.00013 3 2 1 0.00005 0.00005 ABL-SD011 0.0461 0.015425 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 mg/kg -- -- 0.0019 0.00189 3 1 2 0.00005 0.00005 ABL-SD011 0.00189 0.000663 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 mg/kg -- -- 0.0059 0.00589 3 1 2 0.00005 0.00005 ABL-SD011 0.00589 0.001997 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 mg/kg -- -- 0.0266 7.8E-05 3 2 1 0.00005 0.00005 ABL-SD011 0.0266 0.008909 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 mg/kg -- -- 0.0097 0.00967 3 1 2 0.00005 0.00005 ABL-SD011 0.00967 0.003257 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 mg/kg -- -- 0.0185 5.1E-05 3 2 1 0.00005 0.00005 ABL-SD011 0.0185 0.0062 0 0 -- -- Category 3: No ESV & Detect
PCB 180/193 E52450855 mg/kg -- -- 0.119 0.00012 3 3 0 0.0001 0.0001 ABL-SD011 0.119 0.039793 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 mg/kg -- -- 7E-05 7.5E-05 3 1 2 0.00005 0.00005 ABL-SD011 0.0000749 5.83E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 183/185 E52450863 mg/kg -- -- 0.0352 0.0352 3 1 2 0.0001 0.0001 ABL-SD011 0.0352 0.0118 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 mg/kg -- -- 0.0591 6.1E-05 3 3 0 0.00005 0.00005 ABL-SD011 0.0591 0.019783 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 mg/kg -- -- 0.0016 0.00157 3 1 2 0.00005 0.00005 ABL-SD011 0.00157 0.000557 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 mg/kg -- -- 0.0112 0.0112 3 1 2 0.00005 0.00005 ABL-SD011 0.0112 0.003767 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 mg/kg -- -- 0.002 0.00203 3 1 2 0.00005 0.00005 ABL-SD011 0.00203 0.00071 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 mg/kg -- -- 0.0317 0.0317 3 1 2 0.000075 0.000075 ABL-SD011 0.0317 0.010617 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 mg/kg -- -- 0.013 0.013 3 1 2 0.000075 0.000075 ABL-SD011 0.013 0.004383 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 mg/kg -- -- 0.0177 0.0177 3 1 2 0.000075 0.000075 ABL-SD011 0.0177 0.00595 0 0 -- -- Category 3: No ESV & Detect
3 of 5
Table 11
Summary Sediment Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Chemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
Units
PCB 197/200 E52450871 mg/kg -- -- 0.0054 0.00541 3 1 2 0.00015 0.00015 ABL-SD011 0.00541 0.001903 0 0 -- -- Category 3: No ESV & Detect
PCB 198/199 E52450889 mg/kg -- -- 0.0351 0.0351 3 1 2 0.00015 0.00015 ABL-SD011 0.0351 0.0118 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 mg/kg -- -- 0.0046 0.00462 3 1 2 0.000075 0.000075 ABL-SD011 0.00462 0.00159 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 mg/kg -- -- 0.0055 0.00554 3 1 2 0.000075 0.000075 ABL-SD011 0.00554 0.001897 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 mg/kg -- -- 0.0202 0.0202 3 1 2 0.000075 0.000075 ABL-SD011 0.0202 0.006783 0 0 -- -- Category 3: No ESV & Detect
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 mg/kg -- -- 0.0015 0.0015 3 1 2 0.000075 0.000075 ABL-SD011 0.0015 0.00055 0 0 -- -- Category 3: No ESV & Detect
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 mg/kg -- -- 0.0067 0.00666 3 1 2 0.000075 0.000075 ABL-SD011 0.00666 0.00227 0 0 -- -- Category 3: No ESV & Detect
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 mg/kg -- -- 0.0012 0.00117 3 1 2 0.000075 0.000075 ABL-SD011 0.00117 0.00044 0 0 -- -- Category 3: No ESV & Detect
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 mg/kg -- -- 0.0014 0.00143 3 1 2 0.000075 0.000075 ABL-SD011 0.00143 0.000527 0 0 -- -- Category 3: No ESV & Detect
Decachlorobiphenyl (PCB 209)2051-24-3 mg/kg -- -- 0.0001 0.00011 3 1 2 0.000075 0.000075 ABL-SD011 0.000113 8.77E-05 0 0 -- -- Category 3: No ESV & Detect
Total PCBs (Congeners)totPCB_congener_ND=0 mg/kg 0.676 EPA R4 RSV 0.8235 0.00058 3 3 0 0.010667 0.010667 ABL-SD011 0.8235102 0.279743 1 1 1.2 0.4 Category 1: Max EPC>ESV
Total PCBs (Congeners)totPCB_congener_ND=QL/2mg/kg 0.676 EPA R4 RSV 0.8248 0.00571 3 3 0 0.010667 0.010667 ABL-SD011 0.8248327 0.282999 1 1 1.2 0.4 Category 1: Max EPC>ESV
Total PCBs (Congeners)totPCB_congener_ND=LODmg/kg 0.676 EPA R4 RSV 0.8262 0.01085 3 3 0 0.010667 0.010667 ABL-SD011 0.8261552 0.286255 1 1 1.2 0.4 Category 1: Max EPC>ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg 9.82 EPA R4 RSV 0.0262 0.0035 4 2 2 0.0022 0.193 ABL-SD011 0.193 0.056225 0 0 0.0 0.0 No COPEC: EPC<ESV
Anthracene 120-12-7 mg/kg 11.88 EPA R4 RSV 0.0563 0.0036 4 3 1 0.002 0.187 ABL-SD011 0.187 0.063575 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[a]anthracene 56-55-3 mg/kg 16.82 EPA R4 RSV 0.361 0.0171 4 4 0 0.001 0.155 ABL-SD006 0.361 0.176275 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[a]pyrene 50-32-8 mg/kg 19.3 EPA R4 RSV 0.485 0.0191 4 4 0 0.0016 0.16 ABL-SD006 0.485 0.217175 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[b]fluoranthene 205-99-2 mg/kg 19.58 EPA R4 RSV 0.609 0.0176 4 4 0 0.00096 0.144 ABL-SD006 0.609 0.238625 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[g,h,i]perylene 191-24-2 mg/kg 21.8 EPA R4 RSV 0.325 0.01 4 4 0 0.0037 0.213 ABL-SD006 0.325 0.126 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[k]fluoranthene 207-08-9 mg/kg 19.62 EPA R4 RSV 0.217 0.008 4 4 0 0.0022 0.165 ABL-SD006 0.217 0.08745 0 0 0.0 0.0 No COPEC: EPC<ESV
Chrysene 218-01-9 mg/kg 16.88 EPA R4 RSV 0.406 0.0162 4 4 0 0.0026 0.111 ABL-SD006 0.406 0.17835 0 0 0.0 0.0 No COPEC: EPC<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/kg 22.4 EPA R4 RSV 0.0131 0.0131 4 1 3 0.0026 0.177 ABL-SD011 0.177 0.04885 0 0 0.0 0.0 No COPEC: EPC<ESV
Fluoranthene 206-44-0 mg/kg 14.14 EPA R4 RSV 0.632 0.0232 4 4 0 0.0012 0.122 ABL-SD006 0.632 0.272525 0 0 0.0 0.0 No COPEC: EPC<ESV
Fluorene 86-73-7 mg/kg 10.76 EPA R4 RSV 0.0215 0.0028 4 2 2 0.0023 0.172 ABL-SD011 0.172 0.04965 0 0 0.0 0.0 No COPEC: EPC<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg 22.4 EPA R4 RSV 0.247 0.0093 4 4 0 0.004 0.172 ABL-SD006 0.247 0.10375 0 0 0.0 0.0 No COPEC: EPC<ESV
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV 0.0059 0.0059 4 1 3 0.0033 0.205 ABL-SD011 0.205 0.0544 0 0 0.0 0.0 No COPEC: EPC<ESV
Phenanthrene 85-01-8 mg/kg 11.92 EPA R4 RSV 0.386 0.014 4 4 0 0.0022 0.139 ABL-SD006 0.386 0.166125 0 0 0.0 0.0 No COPEC: EPC<ESV
Pyrene 129-00-0 mg/kg 13.94 EPA R4 RSV 0.553 0.0181 4 4 0 0.0026 0.142 ABL-SD006 0.553 0.23065 0 0 0.0 0.0 No COPEC: EPC<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/kg -- -- 3.203 0.1154 4 4 0 0.02126 1.439 ABL-SD006 3.203 1.36155 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg -- -- 3.2915 0.1167 4 4 0 0.02126 1.439 ABL-SD006 3.2915 1.384338 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg -- -- 3.38 0.118 4 4 0 0.02126 1.439 ABL-SD006 3.38 1.407125 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg -- -- 1.018 0.0408 4 4 0 0.0151 1.216 ABL-SD006 1.216 0.47045 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg -- -- 1.4955 0.04565 4 4 0 0.0151 1.216 ABL-SD006 1.4955 0.591988 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg -- -- 1.973 0.0505 4 4 0 0.0151 1.216 ABL-SD006 1.973 0.713525 0 0 -- -- Category 3: No ESV & Detect
4 of 5
Table 11
Summary Sediment Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Chemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
Units
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg 8.92 EPA R4 RSV 0.0027 0.0027 4 1 3 0.0017 0.218 ABL-SD011 0.218 0.05605 0 0 0.0 0.0 No COPEC: EPC<ESV
2-Methylnaphthalene 91-57-6 mg/kg 8.94 EPA R4 RSV 0.0042 0.0023 4 2 2 0.0016 0.18 ABL-SD011 0.18 0.047025 0 0 0.0 0.0 No COPEC: EPC<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 60.5 31.2 4 4 0 0.1 0.1 ABL-SD006 60.5 41.725 0 0 -- -- Category 3: No ESV & Detect
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
RSV - Refined screening value
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
5 of 5
Table 12
Summary Surface Water Screening - Detections in WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Metals
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0146 0.0146 1 1 0 0.0025 0.0025 ABL-SW004 0.0146 0.0146 0 0 0.1 0.1 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/L 0.07229 See Notes 0.0029 0.0029 1 1 0 0.0025 0.0025 ABL-SW004 0.0029 0.0029 0 0 0.0 0.0 No COPEC: EPC<ESV
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
1 of 1
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
Table 13
Summary Sediment Screening - Detections in WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 0.42 0.42 1 1 0 0.24 0.24 ABL-SD004 0.42 0.42 0 0 -- -- Category 3: No ESV & Detect
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 10.4 10.4 1 1 0 0.49 0.49 ABL-SD004 10.4 10.4 0 0 0.3 0.3 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 54.9 54.9 1 1 0 0.24 0.24 ABL-SD004 54.9 54.9 0 0 0.9 0.9 No COPEC: EPC<ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.18 0.18 1 1 0 0.049 0.049 ABL-SD004 0.18 0.18 0 0 0.0 0.0 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 54.7 54.7 1 1 0 0.24 0.24 ABL-SD004 54.7 54.7 0 0 0.5 0.5 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 24.4 24.4 1 1 0 0.24 0.24 ABL-SD004 24.4 24.4 0 0 0.2 0.2 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.019 0.019 1 1 0 0.00014 0.00014 ABL-SD004 0.019 0.019 0 0 0.0 0.0 No COPEC: EPC<ESV
Silver 7440-22-4 mg/kg 2.2 EPA R4 RSV 0.6 0.6 1 1 0 0.24 0.24 ABL-SD004 0.6 0.6 0 0 0.3 0.3 No COPEC: EPC<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 36.5 36.5 1 1 0 0.1 0.1 ABL-SD004 36.5 36.5 0 0 -- -- Category 3: No ESV & Detect
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent ND=QL - Non-detect values presented at the quantitation limit
CAS RN - Chemical Abstracts Service Registry Number ND=QL/2 - Non-detects presented at one half of the quantitation limit
EPA R4 - United States Environmental Protection Agency Region 4 OC - Organic carbon
ESV - Ecological screening value PAH - Polycyclic aromatic hydrocarbon
HMW - High molecular weight PCB - Polychlorinated biphenyl
LMW - Low molecular weight QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample) RSV - Refined screening value
Max - Maximum SVOC - Semi-volatile organic compound
mg/kg - Milligrams per kilogram VOC - Volatile organic compound
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
UnitsChemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
1 of 1
Table 14
Summary Surface Water Screening - Detections WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 28.9 28.9 1 1 0 5 5 ABL-ML002 28.9 28.9 1 1 16.1 16.1 Category 1/5: Max EPC>ESV
Metals
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0481 0.0481 1 1 0 0.0025 0.0025 ABL-ML002 0.0481 0.0481 0 0 0.2 0.2 No COPEC: EPC<ESV
Other Semi-Volatile Organic Compounds (SVOCs)
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/L 0.005 NCDEQ 0.0141 0.0141 1 1 0 0.00085 0.00085 ABL-ML002 0.0141 0.0141 1 1 2.8 2.8 Category 1/5: Max EPC>ESV
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent NCDEQ - North Carolina Department of Environmental Quality
CAS RN - Chemical Abstracts Service Registry Number ND=0 - Non-detect values presented as 0
EPA R4 - United States Environmental Protection Agency Region 4 ND=LOD - Non-detect values presented at the limit of detection (LOD)
HMW - High molecular weight ND=QL - Non-detect values presented at the quantitation limit
LMW - Low molecular weight ND=QL/2 - Non-detects presented at one half of the quantitation limit
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample) PAH - Polycyclic aromatic hydrocarbon
Max - Maximum PCB - Polychlorinated biphenyl
mg/L - Milligram per liter QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Min - Minimum SVOC - Semi-volatile organic compound
NC - North Carolina VOC - Volatile organic compound
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
1 of 1
Table 15
Summary Sediment Screening - Detections in WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 0.43 0.43 1 1 0 0.25 0.25 ABL-SD005 0.43 0.43 0 0 -- -- Category 3: No ESV & Detect
Fluoride 16984-48-8 mg/kg -- -- 144 144 1 1 0 21.5 21.5 ABL-SD005 144 144 0 0 -- -- Category 3: No ESV & Detect
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 15.8 15.8 1 1 0 4.6 4.6 ABL-SD005 15.8 15.8 0 0 0.5 0.5 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 187 187 1 1 0 0.23 0.23 ABL-SD005 187 187 1 1 3.1 3.1 Category 1: Max EPC>ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.55 0.55 1 1 0 0.46 0.46 ABL-SD005 0.55 0.55 0 0 0.1 0.1 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 29.3 29.3 1 1 0 2.3 2.3 ABL-SD005 29.3 29.3 0 0 0.3 0.3 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 23.9 23.9 1 1 0 2.3 2.3 ABL-SD005 23.9 23.9 0 0 0.2 0.2 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.016 0.016 1 1 0 0.00016 0.00016 ABL-SD005 0.016 0.016 0 0 0.0 0.0 No COPEC: EPC<ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Benzo[a]anthracene 56-55-3 mg/kg 16.82 EPA R4 RSV 0.139 0.139 1 1 0 0.106 0.106 ABL-SD005 0.139 0.139 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[a]pyrene 50-32-8 mg/kg 19.3 EPA R4 RSV 0.191 0.191 1 1 0 0.11 0.11 ABL-SD005 0.191 0.191 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[b]fluoranthene 205-99-2 mg/kg 19.58 EPA R4 RSV 0.246 0.246 1 1 0 0.0992 0.0992 ABL-SD005 0.246 0.246 0 0 0.0 0.0 No COPEC: EPC<ESV
Chrysene 218-01-9 mg/kg 16.88 EPA R4 RSV 0.161 0.161 1 1 0 0.0766 0.0766 ABL-SD005 0.161 0.161 0 0 0.0 0.0 No COPEC: EPC<ESV
Fluoranthene 206-44-0 mg/kg 14.14 EPA R4 RSV 0.201 0.201 1 1 0 0.0835 0.0835 ABL-SD005 0.201 0.201 0 0 0.0 0.0 No COPEC: EPC<ESV
Phenanthrene 85-01-8 mg/kg 11.92 EPA R4 RSV 0.0978 0.0978 1 1 0 0.0957 0.0957 ABL-SD005 0.0978 0.0978 0 0 0.0 0.0 No COPEC: EPC<ESV
Pyrene 129-00-0 mg/kg 13.94 EPA R4 RSV 0.199 0.199 1 1 0 0.0975 0.0975 ABL-SD005 0.199 0.199 0 0 0.0 0.0 No COPEC: EPC<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/kg -- -- 0.936 0.936 1 1 0 0.9883 0.9883 ABL-SD005 0.9883 0.936 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg -- -- 1.1855 1.1855 1 1 0 0.9883 0.9883 ABL-SD005 1.1855 1.1855 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg -- -- 1.435 1.435 1 1 0 0.9883 0.9883 ABL-SD005 1.435 1.435 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg -- -- 0.2988 0.2988 1 1 0 0.8352 0.8352 ABL-SD005 0.8352 0.2988 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg -- -- 0.6268 0.6268 1 1 0 0.8352 0.8352 ABL-SD005 0.8352 0.6268 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg -- -- 0.9548 0.9548 1 1 0 0.8352 0.8352 ABL-SD005 0.9548 0.9548 0 0 -- -- Category 3: No ESV & Detect
Other Semi-Volatile Organic Compounds (SVOCs)
Benzoic acid 65-85-0 mg/kg 4 EPA R4 RSV 0.187 0.187 1 1 0 0.104 0.104 ABL-SD005 0.187 0.187 0 0 0.0 0.0 No COPEC: EPC<ESV
Volatile Organic Compounds (VOCs)
Methylene Chloride 75-09-2 mg/kg 4.808 EPA R4 RSV 0.0099 0.0099 1 1 0 0.0057 0.0057 ABL-SD005 0.0099 0.0099 0 0 0.0 0.0 No COPEC: EPC<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 42.5 42.5 1 1 0 0.1 0.1 ABL-SD005 42.5 42.5 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
1 of 2
Table 15
Summary Sediment Screening - Detections in WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
RSV - Refined screening value
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References:
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
2 of 2
Table 16
Summary Surface Water Screening - Detections in WY Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 0.31 0.31 1 1 0 0.25 0.25 ABL-ML001 0.31 0.31 0 0 0.2 0.2 No COPEC: EPC<ESV
Metals
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0465 0.0465 1 1 0 0.0025 0.0025 ABL-ML001 0.0465 0.0465 0 0 0.2 0.2 No COPEC: EPC<ESV
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent NCDEQ - North Carolina Department of Environmental Quality
CAS RN - Chemical Abstracts Service Registry Number ND=0 - Non-detect values presented as 0
EPA R4 - United States Environmental Protection Agency Region 4 ND=LOD - Non-detect values presented at the limit of detection (LOD)
HMW - High molecular weight ND=QL - Non-detect values presented at the quantitation limit
LMW - Low molecular weight ND=QL/2 - Non-detects presented at one half of the quantitation limit
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample) PAH - Polycyclic aromatic hydrocarbon
Max - Maximum PCB - Polychlorinated biphenyl
mg/L - Milligram per liter QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Min - Minimum SVOC - Semi-volatile organic compound
NC - North Carolina VOC - Volatile organic compound
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
UnitsChemical
Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
1 of 1
Table 17
Summary Soil Screening - Detections in Floodplain Upland Forest
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg -- -- 0.135 0.041 10 2 8 0.00071 0.00076 ABL-SB005 0.135 0.018195 0 0 -- -- Category 3: No ESV & Detect
Anthracene 120-12-7 mg/kg -- -- 0.252 0.0198 10 5 5 0.00058 0.00062 ABL-SB005 0.252 0.041934 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]anthracene 56-55-3 mg/kg -- -- 1.04 0.0192 10 9 1 0.001 0.0011 ABL-SB005 1.04 0.21141 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]pyrene 50-32-8 mg/kg -- -- 1.1 0.0208 10 9 1 0.00071 0.00076 ABL-SB005 1.1 0.227543 0 0 -- -- Category 3: No ESV & Detect
Benzo[b]fluoranthene 205-99-2 mg/kg -- -- 1.48 0.0172 10 10 0 0.001 0.0021 ABL-SB005 1.48 0.335 0 0 -- -- Category 3: No ESV & Detect
Benzo[g,h,i]perylene 191-24-2 mg/kg -- -- 0.609 0.0177 10 9 1 0.0015 0.0017 ABL-SB005 0.609 0.14953 0 0 -- -- Category 3: No ESV & Detect
Benzo[k]fluoranthene 207-08-9 mg/kg -- -- 0.444 0.0334 10 8 2 0.00057 0.00061 ABL-SB005 0.444 0.108629 0 0 -- -- Category 3: No ESV & Detect
Chrysene 218-01-9 mg/kg -- -- 1.1 0.0218 10 9 1 0.00069 0.00074 ABL-SB005 1.1 0.228811 0 0 -- -- Category 3: No ESV & Detect
Dibenz(A,H)Anthracene 53-70-3 mg/kg -- -- 0.199 0.0162 10 8 2 0.0016 0.0017 ABL-SB005 0.199 0.04626 0 0 -- -- Category 3: No ESV & Detect
Fluoranthene 206-44-0 mg/kg -- -- 1.58 0.0246 10 9 1 0.0018 0.0037 ABL-SB005 1.58 0.32769 0 0 -- -- Category 3: No ESV & Detect
Fluorene 86-73-7 mg/kg -- -- 0.105 0.0312 10 2 8 0.0006 0.00065 ABL-SB005 0.105 0.014124 0 0 -- -- Category 3: No ESV & Detect
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg -- -- 0.57 0.0155 10 9 1 0.0013 0.0014 ABL-SB005 0.57 0.1304 0 0 -- -- Category 3: No ESV & Detect
Naphthalene 91-20-3 mg/kg -- -- 0.0178 0.0178 10 1 9 0.0009 0.00097 ABL-SB005 0.0178 0.002626 0 0 -- -- Category 3: No ESV & Detect
Phenanthrene 85-01-8 mg/kg -- -- 1.13 0.0294 10 8 2 0.0016 0.0017 ABL-SB005 1.13 0.19804 0 0 -- -- Category 3: No ESV & Detect
Pyrene 129-00-0 mg/kg -- -- 1.33 0.0228 10 9 1 0.0015 0.003 ABL-SB005 1.33 0.2684 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=0 mg/kg 1.1 EPA R4 7.872 0.0172 10 10 0 0.00987 0.01283 ABL-SB005 7.872 1.70484 3 3 7.2 1.5 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg 1.1 EPA R4 7.872 0.02176 10 10 0 0.00987 0.01283 ABL-SB005 7.872 1.7054115 3 3 7.2 1.6 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg 1.1 EPA R4 7.872 0.02632 10 10 0 0.00987 0.01283 ABL-SB005 7.872 1.705983 3 3 7.2 1.6 Category 1: Max EPC>ESV
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg 29 EPA R4 3.2198 0.0246 10 9 1 0.00683 0.00886 ABL-SB005 3.2198 0.59985 0 0 0.1 0.0 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg 29 EPA R4 3.220135 0.027295 10 9 1 0.00683 0.00886 ABL-SB005 3.220135 0.601565 0 0 0.1 0.0 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg 29 EPA R4 3.22047 0.02999 10 9 1 0.00683 0.00886 ABL-SB005 3.22047 0.60328 0 0 0.1 0.0 No COPEC: EPC<ESV
Other Semi-Volatile Organic Compounds (SVOCs)
2-Methylnaphthalene 91-57-6 mg/kg -- -- 0.0179 0.0179 10 1 9 0.00086 0.00093 ABL-SB005 0.0179 0.0026 0 0 -- -- Category 3: No ESV & Detect
Polychlorinated biphenyls (PCBs)
PCB-1260 (Aroclor 1260) 11096-82-5 mg/kg -- -- 0.0563 0.0563 10 1 9 0.0108 0.0118 ABL-SB005 0.0563 0.01573 0 0 -- -- Category 3: No ESV & Detect
Total PCBs (Aroclors) totPCB_ND=0 mg/kg 0.041 EPA R4 0.0563 0.0563 10 1 9 0.0721 0.0788 ABL-SB005 0.0788 0.00563 1 1 1.9 0.1 Category 1: Max EPC>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/kg 0.041 EPA R4 0.0883 0.0883 10 1 9 0.0721 0.0788 ABL-SB005 0.0883 0.04254 1 1 2.2 1.0 Category 1: Max EPC>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/kg 0.041 EPA R4 0.1203 0.1203 10 1 9 0.0721 0.0788 ABL-SB005 0.1203 0.07945 10 10 2.9 1.9 Category 1: Max EPC>ESV
General Chemistry
Moisture, Percent MOIST % -- -- 34.6 29.7 10 10 0 0.1 0.1 ABL-SB003 34.6 32.14 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection Rationale
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
1 of 2
Table 17
Summary Soil Screening - Detections in Floodplain Upland Forest
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The soil screening levels presented above are the recommended screening levels from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 3: Region 4 Soil Screening Values for Hazardous Waste Sites.
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ND=0 - Non-detect values presented as 0.
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
2 of 2
Table 18
Summary Soil Screening - Detections in Substation A
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg -- -- 0.0291 0.0291 5 1 4 0.00067 0.00077 ABL-SB011 0.0291 0.006386 0 0 -- -- Category 3: No ESV & Detect
Acenaphthylene 208-96-8 mg/kg -- -- 0.0136 0.0136 5 1 4 0.0006 0.0007 ABL-SB011 0.0136 0.003234 0 0 -- -- Category 3: No ESV & Detect
Anthracene 120-12-7 mg/kg -- -- 0.0729 0.0729 5 1 4 0.00055 0.00063 ABL-SB011 0.0729 0.015042 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]anthracene 56-55-3 mg/kg -- -- 0.271 0.0281 5 5 0 0.00098 0.0011 ABL-SB011 0.271 0.08154 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]pyrene 50-32-8 mg/kg -- -- 0.318 0.0286 5 5 0 0.00066 0.00077 ABL-SB011 0.318 0.09332 0 0 -- -- Category 3: No ESV & Detect
Benzo[b]fluoranthene 205-99-2 mg/kg -- -- 0.421 0.0504 5 5 0 0.00095 0.0011 ABL-SB011 0.421 0.1348 0 0 -- -- Category 3: No ESV & Detect
Benzo[g,h,i]perylene 191-24-2 mg/kg -- -- 0.232 0.0227 5 5 0 0.0014 0.0017 ABL-SB011 0.232 0.06956 0 0 -- -- Category 3: No ESV & Detect
Benzo[k]fluoranthene 207-08-9 mg/kg -- -- 0.142 0.0189 5 5 0 0.00053 0.00062 ABL-SB011 0.142 0.0473 0 0 -- -- Category 3: No ESV & Detect
Chrysene 218-01-9 mg/kg -- -- 0.272 0.0325 5 5 0 0.00065 0.00075 ABL-SB011 0.272 0.0855 0 0 -- -- Category 3: No ESV & Detect
Dibenz(A,H)Anthracene 53-70-3 mg/kg -- -- 0.0591 0.0591 5 1 4 0.0015 0.0017 ABL-SB011 0.0591 0.01308 0 0 -- -- Category 3: No ESV & Detect
Fluoranthene 206-44-0 mg/kg -- -- 0.387 0.046 5 5 0 0.0017 0.002 ABL-SB011 0.387 0.12958 0 0 -- -- Category 3: No ESV & Detect
Fluorene 86-73-7 mg/kg -- -- 0.0222 0.0222 5 1 4 0.00057 0.00066 ABL-SB011 0.0222 0.004924 0 0 -- -- Category 3: No ESV & Detect
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg -- -- 0.19 0.0205 5 5 0 0.0012 0.0014 ABL-SB011 0.19 0.05762 0 0 -- -- Category 3: No ESV & Detect
Phenanthrene 85-01-8 mg/kg -- -- 0.259 0.0158 5 5 0 0.0015 0.0017 ABL-SB011 0.259 0.07092 0 0 -- -- Category 3: No ESV & Detect
Pyrene 129-00-0 mg/kg -- -- 0.324 0.0375 5 5 0 0.0014 0.0016 ABL-SB011 0.324 0.10108 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=0 mg/kg 1.1 EPA R4 2.2291 0.2524 5 5 0 0.00927 0.01074 ABL-SB011 2.2291 0.68254 1 1 2.0 0.6 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg 1.1 EPA R4 2.2291 0.25315 5 5 0 0.00927 0.01074 ABL-SB011 2.2291 0.68317 1 1 2.0 0.6 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg 1.1 EPA R4 2.2291 0.2539 5 5 0 0.00927 0.01074 ABL-SB011 2.2291 0.6838 1 1 2.0 0.6 Category 1: Max EPC>ESV
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg 29 EPA R4 0.7838 0.0657 5 5 0 0.00644 0.00744 ABL-SB011 0.7838 0.22806 0 0 0.0 0.0 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg 29 EPA R4 0.784225 0.06757 5 5 0 0.00644 0.00744 ABL-SB011 0.784225 0.229518 0 0 0.0 0.0 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg 29 EPA R4 0.78465 0.06944 5 5 0 0.00644 0.00744 ABL-SB011 0.78465 0.230976 0 0 0.0 0.0 No COPEC: EPC<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 35 25.6 5 5 0 0.1 0.1 ABL-SB015 35 28.7 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
1 of 2
Table 18
Summary Soil Screening - Detections in Substation A
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The soil screening levels presented above are the recommended screening levels from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 3: Region 4 Soil Screening Values for Hazardous Waste Sites.
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ND=0 - Non-detect values presented as 0.
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
2 of 2
Table 19
Summary Soil Screening - Detections in Substation B
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg -- -- 0.249 0.249 5 1 4 0.00062 0.0007 ABL-SB017 0.249 0.050334 0 0 -- -- Category 3: No ESV & Detect
Acenaphthylene 208-96-8 mg/kg -- -- 0.0398 0.0197 5 3 2 0.00056 0.00063 ABL-SB020 0.0398 0.01792 0 0 -- -- Category 3: No ESV & Detect
Anthracene 120-12-7 mg/kg -- -- 0.581 0.0175 5 4 1 0.00051 0.00057 ABL-SB017 0.581 0.136406 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]anthracene 56-55-3 mg/kg -- -- 5.2 0.0539 5 5 0 0.00095 0.0091 ABL-SB017 5.2 1.1492 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]pyrene 50-32-8 mg/kg -- -- 6.66 0.0559 5 5 0 0.00065 0.0062 ABL-SB017 6.66 1.4285 0 0 -- -- Category 3: No ESV & Detect
Benzo[b]fluoranthene 205-99-2 mg/kg -- -- 9.66 0.0986 5 5 0 0.00093 0.0089 ABL-SB017 9.66 2.10992 0 0 -- -- Category 3: No ESV & Detect
Benzo[g,h,i]perylene 191-24-2 mg/kg -- -- 4.86 0.0412 5 5 0 0.0014 0.0135 ABL-SB017 4.86 1.03558 0 0 -- -- Category 3: No ESV & Detect
Benzo[k]fluoranthene 207-08-9 mg/kg -- -- 3.6 0.035 5 5 0 0.00052 0.005 ABL-SB017 3.6 0.77952 0 0 -- -- Category 3: No ESV & Detect
Chrysene 218-01-9 mg/kg -- -- 5.53 0.06 5 5 0 0.00063 0.006 ABL-SB017 5.53 1.22194 0 0 -- -- Category 3: No ESV & Detect
Dibenz(A,H)Anthracene 53-70-3 mg/kg -- -- 1.7 0.0142 5 5 0 0.0015 0.014 ABL-SB017 1.7 0.36224 0 0 -- -- Category 3: No ESV & Detect
Fluoranthene 206-44-0 mg/kg -- -- 5.35 0.0801 5 5 0 0.0016 0.0157 ABL-SB017 5.35 1.19702 0 0 -- -- Category 3: No ESV & Detect
Fluorene 86-73-7 mg/kg -- -- 0.209 0.209 5 1 4 0.00053 0.00059 ABL-SB017 0.209 0.042252 0 0 -- -- Category 3: No ESV & Detect
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg -- -- 4.26 0.0374 5 5 0 0.0012 0.011 ABL-SB017 4.26 0.9098 0 0 -- -- Category 3: No ESV & Detect
Naphthalene 91-20-3 mg/kg -- -- 0.12 0.12 5 1 4 0.00079 0.00089 ABL-SB017 0.12 0.024678 0 0 -- -- Category 3: No ESV & Detect
Phenanthrene 85-01-8 mg/kg -- -- 2.56 0.0349 5 5 0 0.0014 0.0137 ABL-SB017 2.56 0.56342 0 0 -- -- Category 3: No ESV & Detect
Pyrene 129-00-0 mg/kg -- -- 4.49 0.0665 5 5 0 0.0013 0.0128 ABL-SB017 4.49 1.0071 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=0 mg/kg 1.1 EPA R4 45.96 0.4627 5 5 0 0.00908 0.0865 ABL-SB017 45.96 10.0038 3 3 41.8 9.1 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg 1.1 EPA R4 45.96 0.4627 5 5 0 0.00908 0.0865 ABL-SB017 45.96 10.0038 3 3 41.8 9.1 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg 1.1 EPA R4 45.96 0.4627 5 5 0 0.00908 0.0865 ABL-SB017 45.96 10.0038 3 3 41.8 9.1 Category 1: Max EPC>ESV
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg 29 EPA R4 9.0979 0.115 5 5 0 0.00614 0.03241 ABL-SB017 9.0979 2.03002 0 0 0.3 0.1 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg 29 EPA R4 9.0979 0.116575 5 5 0 0.00614 0.03241 ABL-SB017 9.0979 2.031025 0 0 0.3 0.1 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg 29 EPA R4 9.0979 0.11815 5 5 0 0.00614 0.03241 ABL-SB017 9.0979 2.03203 0 0 0.3 0.1 No COPEC: EPC<ESV
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg -- -- 0.0262 0.0262 5 1 4 0.00076 0.00085 ABL-SB017 0.0262 0.00589 0 0 -- -- Category 3: No ESV & Detect
2-Methylnaphthalene 91-57-6 mg/kg -- -- 0.0419 0.0419 5 1 4 0.00076 0.00085 ABL-SB017 0.0419 0.00903 0 0 -- -- Category 3: No ESV & Detect
Polychlorinated biphenyls (PCBs)
PCB-1248 (Aroclor 1248) 12672-29-6 mg/kg -- -- 0.117 0.117 5 1 4 0.0073 0.0081 ABL-SB017 0.117 0.0296 0 0 -- -- Category 3: No ESV & Detect
PCB-1254 (Aroclor 1254) 11097-69-1 mg/kg -- -- 0.0875 0.0875 5 1 4 0.0078 0.0087 ABL-SB017 0.0875 0.02412 0 0 -- -- Category 3: No ESV & Detect
Total PCBs (Aroclors) totPCB_ND=0 mg/kg 0.041 EPA R4 0.2045 0.2045 5 1 4 0.0637 0.0708 ABL-SB017 0.2045 0.0409 1 1 5.0 1.0 Category 1: Max EPC>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/kg 0.041 EPA R4 0.2288 0.2288 5 1 4 0.0637 0.0708 ABL-SB017 0.2288 0.07284 1 1 5.6 1.8 Category 1: Max EPC>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/kg 0.041 EPA R4 0.2531 0.2531 5 1 4 0.0637 0.0708 ABL-SB017 0.2531 0.10478 5 5 6.2 2.6 Category 1: Max EPC>ESV
General Chemistry
Moisture, Percent MOIST % -- -- 28.3 19.3 5 5 0 0.1 0.1 ABL-SB019 28.3 23.76 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
1 of 2
Table 19
Summary Soil Screening - Detections in Substation B
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The soil screening levels presented above are the recommended screening levels from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 3: Region 4 Soil Screening Values for Hazardous Waste Sites.
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ND=0 - Non-detect values presented as 0.
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
2 of 2
Table 20
Summary Groundwater Screening - Detections in Floodplain
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/L 0.005 NCDEQ 0.11 0.005 12 8 4 0.004 0.004 ABL-MW005 0.11 0.03087 7 7 22.0 6.2 Category 1/5: Max EPC>ESV
Cyanide, Available 57-12-5_AVAIL mg/L 0.005 NCDEQ 0.027 0.00031 15 8 7 0.0003 0.0003 ABL-MW005 0.027 0.00522 4 4 5.4 1.0 Category 1/5: Max EPC>ESV
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 0.76 0.054 24 18 6 0.0068 0.2 ABL-MW005 0.76 0.17808 0 0 0.4 0.1 No COPEC: EPC<ESV
Metals
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.01 0.01 1 1 0 0.0023 0.0023 ABL-MW005 0.01 0.01 0 0 0.0 0.0 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/L 0.07229 See Notes 0.0019 0.0019 1 1 0 0.0012 0.0012 ABL-MW005 0.0019 0.0019 0 0 0.0 0.0 No COPEC: EPC<ESV
Cobalt 7440-48-4 mg/L 0.0016 NCDEQ 0.072 0.072 1 1 0 0.00095 0.00095 ABL-MW005 0.072 0.072 1 1 45.0 45.0 Category 1/5: Max EPC>ESV
Volatile Organic Compounds (VOCs)
Chloroform 67-66-3 mg/L 0.14 USEPA R4 0.00018 0.00018 1 1 0 0.00014 0.00014 ABL-MW005 0.00018 0.00018 0 0 0.0 0.0 No COPEC: EPC<ESV
General Chemistry
Total Carbon 7440-44-0 mg/L -- -- 1.1 0.51 9 6 3 0.5 0.5 ABL-MW005 1.1 0.65444 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
1 of 2
Table 20
Summary Groundwater Screening - Detections in Floodplain
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The groundwater screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
2 of 2
Table 21
Summary Wet Well Screening - Detections in Wet Well
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max Min
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL Mean ND=QL ND=0 ND=QL Max
Mean
NDQL
Inorganics
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 26 12 4 4 0 0.34 0.68 ABL-WW 26 18.575 4 4 14.44 10.3 Category 1/5: Max EPC>ESV
Notes
The wet well screening level presented above was compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
-- - No information is available for this field.
Max Detect or QL is the maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
CAS RN - Chemical Abstracts Service Registry Number
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
UnitsChemical
Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
1 of 1
Table 22
Ecological Receptors, Assessment/Measurement Endpoints, and Risk Questions - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Ecological Receptor Category Assessment Endpoints Risk Questions Focal Species/Level of
Organization
Are concentrations of site-related COPECs in sediment, pore water, or surface water
greater than effects thresholds for the survival, growth, or reproduction of benthic
invertebrates?
Population
Is the survival or growth of freshwater test organisms exposed to whole sediments
from aquatic exposure areas significantly lower than comparable endpoints for test
organisms exposed to whole sediments from reference areas?
Population
a) SQT Line of Evidence: Statistical comparisons of multiple metrics (e.g., richness,
composition, tolerance measures) that measure the structure and function of benthic
invertebrate communities between study and reference stations; statistical evaluation of the
results of the multi-metric community analyses with site-related COPEC concentrations in
exposure media and other habitat parameters.
b) Multivariate statistical comparisons (e.g., ordination) of benthic invertebrate taxa-
abundance data to evaluate the structure and function of benthic communities between
exposure area and reference area stations; statistical evaluation of the results of the
multivariate analyses of community data with THg or MeHg concentrations in exposure media
and other habitat parameters.
Are concentrations of site-related COPECs in surface water greater than effects
thresholds for the survival, growth, or reproduction of pelagic invertebrates?Population
Are concentrations of site-related COPECs in surface water greater than effects
thresholds for the survival, growth, or reproduction of pelagic invertebrates?Population
Measurement Endpoints
Benthic invertebrate community
Survival, growth, and reproduction of benthic macroinvertebrate
populations to support the maintenance of viable and functional benthic
macroinvertebrate communities.
Tier 1:
1) Comparisons of COPEC concentrations in bulk sediment to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative (e.g., epifaunal) benthic
invertebrate test organisms.
2) Comparisons of COPEC concentrations in surface water to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative (e.g., epifaunal) benthic
invertebrate test organisms.
3) Comparisons of COPEC concentrations in pore water to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative (e.g., epifaunal) benthic
invertebrate test organisms.
Tier 2:
4) Sediment Quality Triad (SQT) Line of Evidence: Sediment Toxicity Testing
Statistical comparisons of survival, growth, or reproduction endpoints from chronic, long-term
sediment toxicity testing of bulk sediments from aquatic exposure areas to comparable
endpoints from reference areas.
Is the benthic community structure in aquatic exposure areas different from the
benthic community structure in reference areas with similar habitat? If differences
in structure are observed, are those differences explained by site-related COPEC
concentrations in abiotic exposure media and/or other habitat parameters?
Community
5) SQT Line of Evidence: Benthic Invertebrate Community Analysis:
Water-column invertebrate
community
Survival, growth, and reproduction of pelagic invertebrate populations to
support the maintenance of viable and functional pelagic invertebrate
communities.
Tier 1:
1) Comparisons of COPEC concentrations in surface water to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative pelagic invertebrate test
organisms.
Tier 2:
2) Statistical comparisons of survival, growth, or reproduction endpoints from chronic, long-term
surface water toxicity testing of surface water from aquatic exposure areas to comparable
endpoints from reference areas.
1 of 2
Table 22
Ecological Receptors, Assessment/Measurement Endpoints, and Risk Questions - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Ecological Receptor Category Assessment Endpoints Risk Questions Focal Species/Level of
Organization Measurement Endpoints
Fish Survival, growth, and reproduction of fish populations to support the
maintenance of viable and functional fish communities.
Are concentrations of site-related COPECs in surface water greater than effects
thresholds for the survival, growth, or reproduction of fish?Population
Amphibians Survival, growth, and reproduction of amphibian populations to support
the maintenance of viable and functional amphibian communities.
Are concentrations of site-related COPECs in surface water greater than effects
thresholds for the survival, growth, or reproduction of amphibians?Population
Reptiles Survival, growth, and reproduction of reptile populations to support the
maintenance of viable and functional reptilian communities.
Are concentrations of site-related COPECs in surface water and sediment greater
than effects thresholds for the survival, growth, or reproduction of reptiles?Population
Birds
Piscivores Survival, growth, and reproduction of semi-aquatic avian populations to
support the maintenance of viable and functional avian communities.
Does the daily dose of site-related COPEC experienced by piscivorous birds through
the direct ingestion of dietary items or incidental ingestion of sediment from aquatic
exposure areas exceed toxicity reference values (TRVs) for the survival, growth, or
reproduction of avian test organisms?
Belted Kingfisher
(Megaceryle alcyon )
Mammals
Omnivores
Survival, growth, and reproduction of omnivorous mammalian
populations to support the maintenance of viable and functional
mammalian communities.
Does the daily dose of site-related COPEC experienced by omnivorous mammals
through the direct ingestion of dietary items or incidental ingestion of sediment
from aquatic exposure areas exceed toxicity reference values (TRVs) for the survival,
growth, or reproduction of mammalian test organisms?
Racoon
(Mustela vison )
1) Comparisons of COPEC concentrations in surface water to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative reptilian test organisms.
2) Comparisons of COPEC concentrations in sediment to NOECs and LOECs derived from survival,
growth, and reproductive endpoints for representative reptilian test organisms.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using concentrations of COPECs
estimated or measured in surface water, sediment, and biological tissues.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using concentrations of COPECs
estimated or measured in surface water, sediment, and biological tissues.
1) Comparisons of COPEC concentrations in surface water to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative fish test organisms.
1) Comparisons of COPEC concentrations in surface water to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative amphibian test organisms.
2) Comparisons of COPEC concentrations in pore water to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative amphibian test organisms.
2 of 2
Table 23
Ecological Receptors, Assessment/Measurement Endpoints, and Risk Questions - Floodplain Wetland/Drainage Receptors
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Ecological Receptor Category Assessment Endpoints Risk Questions Focal Species/Level of
Organization
Wetland invertebrate community
Survival, growth, and reproduction of benthic invertebrate
populations to support the maintenance of viable and functional
wetland invertebrate communities.
Are concentrations of site-related COPECs in sediment or surface water greater
than effects thresholds for the survival, growth, or reproduction of benthic
invertebrates?Population
Wetland plant community
Survival, growth, and reproduction of aquatic plant populations to
support the maintenance of viable and functional wetland plant
communities.
Are concentrations of site-related COPECs in surface water greater than effects
thresholds for the survival, growth, or reproduction of aquatic plants?Population
Amphibians
Survival, growth, and reproduction of amphibian populations to
support the maintenance of viable and functional amphibian
communities.
Are concentrations of site-related COPECs in surface water greater than effects
thresholds for the survival, growth, or reproduction of amphibians?Population
Reptiles Survival, growth, and reproduction of reptile populations to support
the maintenance of viable and functional reptilian communities.
Are concentrations of site-related COPECs in surface water greater than effects
thresholds for the survival, growth, or reproduction of reptiles?Population
Birds
Terrestrial carnivores Survival, growth, and reproduction of avian carnivore populations to
support the maintenance of viable and functional avian communities.
Does the daily dose of site-related COPEC experienced by carnivorous birds
through the direct ingestion of dietary items or incidental ingestion of hydric
soil/sediment from transitional exposure areas exceed toxicity reference values
(TRVs) for the survival, growth, or reproduction of avian test organisms?
Red-tailed hawk (Buteo
jamaicensis)
Terrestrial invertivores Survival, growth, and reproduction of avian invertivore populations to
support the maintenance of viable and functional avian communities.
Does the daily dose of site-related COPEC experienced by invertivorous birds
through the direct ingestion of dietary items or incidental ingestion of hydric
soil/sediment of surface water from transitional exposure areas exceed toxicity
reference values (TRVs) for the survival, growth, or reproduction of avian test
organisms?
American woodcock
(Scolopax minor )
Terrestrial herbivores Survival, growth, and reproduction of avian herbivore populations to
support the maintenance of viable and functional avian communities.
Does the daily dose of site-related COPEC experienced by herbivorous birds
through the direct ingestion of dietary items or incidental ingestion of hydric
soil/sediment from transitional exposure areas exceed toxicity reference values
(TRVs) for the survival, growth, or reproduction of avian test organisms?
Mourning dove
(Zenaida macroura )
Mammals
Terrestrial carnivores
Survival, growth, and reproduction of mammalian carnivore
populations to support the maintenance of viable and functional
mammalian communities.
Does the daily dose of site-related COPEC experienced by carnivorous mammals
through the direct ingestion of dietary items or incidental ingestion of hydric
soil/sediment from transitional exposure areas exceed toxicity reference values
(TRVs) for the survival, growth, or reproduction of mammalian test organisms?
Long-tailed weasel
(Mustela frenata )
Terrestrial invertivores
Survival, growth, and reproduction of mammalian invertivore
populations to support the maintenance of viable and functional
mammalian communities.
Does the daily dose of site-related COPEC experienced by invertivorous
mammals through the direct ingestion of dietary items, incidental ingestion of
hydric soil/sediment from transitional exposure areas exceed toxicity reference
values (TRVs) for the survival, growth, or reproduction of mammalian test
organisms?
Northern short-tailed shrew
(Blarina brevicauda )
Terrestrial herbivores
Survival, growth, and reproduction of mammalian herbivore
populations to support the maintenance of viable and functional
mammalian communities.
Does the daily dose of site-related COPEC experienced by herbivorous mammals
through the direct ingestion of dietary items or incidental ingestion of hydric
soil/sediment from transitional exposure areas exceed toxicity reference values
(TRVs) for the survival, growth, or reproduction of mammalian test organisms?
Meadow Vole
(Microtus pennsylvanicus)
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated concentrations
of site-specific COPECs in dietary items and hydric soil/sediment.
Measurement Endpoints
1) Comparisons of COPEC concentrations in bulk sediment to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative benthic invertebrate test
organisms.
2) Comparisons of COPEC concentrations in surface water to NOECs and LOECs derived from 1) Comparisons of COPEC concentrations in bulk sediment to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative aquatic/wetland plant test
organisms.
1) Comparisons of COPEC concentrations in surface water to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative amphibian test organisms.
1) Comparisons of COPEC concentrations in surface water to NOECs and LOECs derived from
survival, growth, and reproductive endpoints for representative reptilian test organisms.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated concentrations
of site-specific COPECs in dietary items and hydric soil/sediment.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated concentrations
of site-specific COPECs in dietary items and hydric soil/sediment.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated concentrations
of site-specific COPECs in dietary items and hydric soil/sediment.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated concentrations
of site-specific COPECs in dietary items and hydric soil/sediment.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated concentrations
of site-specific COPECs in dietary items and hydric soil/sediment.
1 of 1
Table 24
Ecological Receptors, Assessment/Measurement Endpoints, and Risk Questions - Floodplain Wetland/Drainage Receptors
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Ecological Receptor Category Assessment Endpoints Risk Questions Focal Species/Level of
Organization
Soil/litter Invertebrate Community
Survival, growth, and reproduction of soil/litter invertebrate populations
to support the maintenance of viable and soil/litter invertebrate
communities.
Are concentrations of site-related COPECs in surface water and sediment greater
than effects thresholds for the survival, growth, or reproduction of amphibians?Community
Terrestrial Plant Community
Survival, growth, and reproduction of terrestrial plant populations to
support the maintenance of viable and functional terrestrial plant
communities.
Are concentrations of site-related COPECs in soil greater than effects thresholds for
the survival, growth, or reproduction of terrestrial plants?Community
Birds
Carnivores Survival, growth, and reproduction of avian carnivore populations to
support the maintenance of viable and functional avian communities.
Does the daily dose of site-related COPEC experienced by carnivorous birds
through the direct ingestion of dietary items or incidental ingestion of soil from
terrestrial exposure areas exceed toxicity reference values (TRVs) for the survival,
growth, or reproduction of avian test organisms?
Red-tailed hawk (Buteo
jamaicensis)
Invertivores Survival, growth, and reproduction of avian invertivore populations to
support the maintenance of viable and functional avian communities.
Does the daily dose of site-related COPEC experienced by invertivorous birds
through the direct ingestion of dietary items or incidental ingestion of soil from
terrestrial exposure areas exceed toxicity reference values (TRVs) for the survival,
growth, or reproduction of avian test organisms?
American woodcock
(Scolopax minor)
Herbivores Survival, growth, and reproduction of avian herbivore populations to
support the maintenance of viable and functional avian communities.
Does the daily dose of site-related COPEC experienced by herbivorous birds
through the direct ingestion of dietary items or incidental ingestion of soil from
terrestrial exposure areas exceed toxicity reference values (TRVs) for the survival,
growth, or reproduction of avian test organisms?
Mourning dove
(Zenaida macroura)
Mammals
Carnivores
Survival, growth, and reproduction of mammalian carnivore populations to
support the maintenance of viable and functional mammalian
communities.
Does the daily dose of site-related COPEC experienced by carnivorous mammals
through the direct ingestion of dietary items or incidental ingestion of soil from
terrestrial exposure areas exceed toxicity reference values (TRVs) for the survival,
growth, or reproduction of mammalian test organisms?
Long-tailed weasel
(Mustela frenata)
Invertivores
Survival, growth, and reproduction of mammalian invertivore populations
to support the maintenance of viable and functional mammalian
communities.
Does the daily dose of site-related COPEC experienced by invertivorous mammals
through the direct ingestion of dietary items or incidental ingestion of soil from
terrestrial exposure areas exceed toxicity reference values (TRVs) for the survival,
growth, or reproduction of mammalian test organisms?
Northern short-tailed shrew
(Blarina brevicauda )
Herbivores
Survival, growth, and reproduction of mammalian herbivore populations
to support the maintenance of viable and functional mammalian
communities.
Does the daily dose of site-related COPEC experienced by herbivorous mammals
through the direct ingestion of dietary items or incidental ingestion of soil from
terrestrial exposure areas exceed toxicity reference values (TRVs) for the survival,
growth, or reproduction of mammalian test organisms?
Meadow vole
(Microtus pennsylvanicus)
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated
concentrations of site-specific COPECs in dietary items and soil.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated
concentrations of site-specific COPECs in dietary items and soil.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated
concentrations of site-specific COPECs in dietary items and soil.
Measurement Endpoints
1) Comparisons of COPEC concentrations in surficial soil (0-2-feet bgs) to NOECs and LOECs
derived from survival, growth, and reproductive endpoints for representative soil/litter
invertebrate test organisms.
1) Comparisons of COPEC concentrations in surficial soil (0-2-feet bgs) to NOECs and LOECs
derived from survival, growth, and reproductive endpoints for representative terrestrial plants.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated
concentrations of site-specific COPECs in dietary items and soil.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated
concentrations of site-specific COPECs in dietary items and soil.
Comparison of NOAEL and LOAEL TRVs to dietary doses modeled using estimated
concentrations of site-specific COPECs in dietary items and soil.
1 of 1
Table 25
Proposed Analytical Suites
Baseline Ecological Risk Assessment Work Plan
Badin Business Park ‐ Badin, North Carolina
Alcoa Corporation
Parameter Type Analytic Method
General Chemistry
Moisture, Percent ASTM D2974‐87
Total Organic Carbon Lloyd Kahn
Grain Size*SM D422
pH EPA 9040C or SM 4500H
Inorganics
Total Fluoride SM 4500F B and EPA 300.0
Total Cyanide EPA 9013A and ASTM D7511
Metals
Arsenic, Barium, Cadmium, Chromium, Lead, Selenium, Silver EPA 6010 or EPA 200.8
Mercury EPA 7471 or EPA 245.1
Semi‐Volatile Organic Constituents (SVOC)
EPA 8270
EPA 8270D by SIM
Polychlorinated Biphenyls (PCBs)
PCB Homologs EPA 1668A
General Chemistry (Hardness and DOC will be Filtered)
Alkalinity (Total, Carbonate, and Bicarbonate) SM2320B
Bromide, Chloride, Sulfate, Fluoride EPA 300.0 or EPA 9056A
Total Hardness EPA 6010 or EPA 200.8
pH EPA 9040C or SM 4500H
Dissolved Organic Carbon (DOC) SM 5310 B‐2011
Inorganics
Dissolved Fluoride EPA 300.0 or EPA 9056A
Available Cyanide  OIA‐1677 or ASTM D6888‐09
Total Cyanide ASTM D7511
Metals (Total and Filtered Fractions)
Arsenic, Barium, Cadmium, Chromium, Lead, Selenium, Silver EPA 6010 or EPA 200.8
Mercury EPA 7471 or EPA 245.1
Semi‐Volatile Organic Constituents (SVOC)
EPA 8270
EPA 8270D by SIM
Polychlorinated Biphenyls (PCBs)
PCB Homologs EPA 1668A
Notes:
* Grain size should be analyzed in all sediment samples; given sample counts, 
grain size is proposed in 50% of soil samples (identified at random)
EPA Priority 16 Polycyclic Aromatic Hydrocarbons PAHs and SVOC suite
Soil and Sediment
EPA Priority 16 Polycyclic Aromatic Hydrocarbons PAHs and SVOC suite
Surface Water, Pore Water, Groundwater
1 of 1
Table 26
Proposed Sample Locations
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
X coordinate Y coordinate X coordinate Y coordinate
Hydric Soil HSB001 N 1665094.01 603017.3801 -80.123898 35.401696
Hydric Soil HSB002 N 1665062.342 603100.4078 -80.124007 35.401924
Hydric Soil HSB003 N 1664937.436 603164.2683 -80.124429 35.402095
Hydric Soil HSB004 N 1664926.359 603248.6943 -80.124469 35.402327
Hydric Soil HSB005 N 1664790.758 603247.1651 -80.124924 35.402318
Hydric Soil HSB006 N 1664830.614 603280.4321 -80.124792 35.402411
Hydric Soil HSB007 N 1664738.009 603339.8503 -80.125105 35.402571
Hydric Soil HSB008 N 1664671.655 603342.7436 -80.125327 35.402577
Hydric Soil HSB009 N 1664672.923 603434.2087 -80.125327 35.402829
Hydric Soil HSB010 N 1664500.555 603335.6269 -80.125901 35.402552
Hydric Soil HSB011 N 1664508.804 603415.71 -80.125877 35.402773
Hydric Soil HSB012 N 1664388.918 603453.1791 -80.12628 35.402872
Hydric Soil HSB013 N 1664387.79 603530.2439 -80.126287 35.403083
Hydric Soil HSB014 N 1664316.048 603503.3555 -80.126527 35.403007
Hydric Soil HSB015 N 1664295.341 603438.5935 -80.126594 35.402829
Hydric Soil HSB016 N 1664200.302 603498.0596 -80.126915 35.402989
Hydric Soil HSB017 N 1664166.852 603613.3838 -80.127032 35.403305
Hydric Soil HSB018 N 1664224.622 603689.8053 -80.126841 35.403517
Hydric Soil HSB019 N 1664313.357 603626.4507 -80.126541 35.403345
Hydric Soil HSB020 N 1664451.461 603634.2083 -80.126077 35.403371
Hydric Soil HSB021 N 1664496.741 603616.8248 -80.125925 35.403325
Hydric Soil HSB022 N 1664508.042 603553.9591 -80.125885 35.403152
Surface Water/Pore Water DSA01 N 1664962.86 602976.4294 -80.124336 35.40158
Surface Water/Pore Water DSB01 N 1664719.043 603134.4304 -80.125161 35.402006
Surface Water/Pore Water/Surface Sediment SW003 Y 1663990.142 603608.4672 -80.127625 35.403286
Surface Water/Pore Water/Surface Sediment SW008 Y 1665470.055 602585.0503 -80.12262 35.40052
Surface Water/Pore Water/Surface Sediment SW009(+50) Y 1664975.735 602904.4394 -80.12429 35.401382
Surface Water/Pore Water/Surface Sediment SW010 Y 1664864.175 603091.7586 -80.124672 35.401894
Surface Water/Pore Water/Surface Sediment SW011 Y 1664178.787 603202.2787 -80.126976 35.402176
Surface Water/Pore Water/Surface Sediment SW012 Y 1663955.062 603722.7202 -80.127747 35.403599
Surface Water/Pore Water/Surface Sediment SW016 N 1664775.364 603117.0807 -80.124971 35.40196
Surface Water/Pore Water/Surface Sediment SW017 N 1665674.6 602226.2731 -80.12192 35.399541
Surface Water/Pore Water/Surface Sediment SW018 N 1665616.174 601717.5605 -80.122096 35.398142
Surficial Soil SSB001 N 1665114 602930.1893 -80.123827 35.401457
Surficial Soil SSB002 N 1665018.514 602944.9462 -80.124148 35.401495
Surficial Soil SSB003 N 1664994.758 603065.4647 -80.124233 35.401825
Surficial Soil SSB004 N 1664854.676 603208.3049 -80.124708 35.402214
Surficial Soil SSB005 N 1664616.586 603154.3431 -80.125505 35.402058
Surficial Soil SSB006 N 1664649.034 603288.8812 -80.125401 35.402428
Surficial Soil SSB007 N 1664614.909 603465.706 -80.125523 35.402913
Surficial Soil SSB008 N 1664511.959 603504.3083 -80.12587 35.403016
Surficial Soil SSB009 N 1664514.137 603366.3404 -80.125857 35.402637
Surficial Soil SSB010 N 1664494.613 603264.3147 -80.125919 35.402356
Surficial Soil SSB011 N 1664391.555 603126.1588 -80.126259 35.401973
Surficial Soil SSB012 N 1664386.618 603237.2878 -80.12628 35.402279
Surficial Soil SSB013 N 1664236.672 603255.0289 -80.126784 35.402323
Surficial Soil SSB014 N 1664374.48 603400.3613 -80.126327 35.402726
Surficial Soil SSB015 N 1664243.046 603351.8443 -80.126766 35.402589
Surficial Soil SSB016 N 1664134.681 603427.1972 -80.127133 35.402792
Surficial Soil SSB017 N 1664258.388 603554.3551 -80.126722 35.403146
Surficial Soil SSB018 N 1664047.527 603538.1392 -80.127429 35.403095
Matrix Location ID
Previously
Sampled?
NAD83 NC State Plane (FT)WGS84 (d.d.)
1 of 2
Table 26
Proposed Sample Locations
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
X coordinate Y coordinate X coordinate Y coordinate
Matrix Location ID
Previously
Sampled?
NAD83 NC State Plane (FT)WGS84 (d.d.)
Surficial Soil SSB019 N 1664167.17 603658.7391 -80.127032 35.40343
Surficial Soil SSB020 N 1664368.704 603669.4654 -80.126357 35.403465
Background Soil BKG-SB001 N 1664031.92 603687.9631 -80.127487 35.403506
Background Soil BKG-SB002 N 1664100.784 603747.0516 -80.127259 35.40367
Background Soil BKG-SB003 N 1663992.677 603771.7582 -80.127622 35.403735
Background Soil BKG-SB004 N 1664096.299 603686.156 -80.127271 35.403503
Background Soil BKG-SB005 N 1663956.558 603871.0923 -80.127747 35.404006
Background Soil BKG-SB006 N 1663878.584 603995.096 -80.128014 35.404345
Background Soil BKG-SB007 N 1663823.977 604093.4426 -80.128201 35.404613
Background Soil BKG-SB008 N 1663763.899 604133.1187 -80.128404 35.40472
Background Soil BKG-SB009 N 1663733.789 604270.1115 -80.12851 35.405096
Background Soil BKG-SB010 N 1663817.194 604335.8201 -80.128233 35.405279
Background Soil BKG-SB011 N 1663680.845 604347.5294 -80.128691 35.405307
Background Soil BKG-SB012 N 1663803.229 604248.9374 -80.128276 35.40504
Background Soil BKG-SB013 N 1663674.722 604464.0537 -80.128716 35.405627
Background Soil BKG-SB014 N 1663743.495 604423.5873 -80.128483 35.405518
Background Soil BKG-SB015 N 1663719.602 604542.4151 -80.128568 35.405843
Background Soil BKG-SB016 N 1663608.425 604689.4512 -80.128947 35.406244
Background Soil BKG-SB017 N 1663673.176 604694.8085 -80.12873 35.406261
Background Soil BKG-SB018 N 1663608.571 604817.5832 -80.128951 35.406596
Background Soil BKG-SB019 N 1663633.405 604979.9628 -80.128874 35.407043
Background Soil BKG-SB020 N 1663513.876 605159.8325 -80.129282 35.407533
2 of 2
Table 27
List of Exposure Factors and Variables for Dietary Exposure Modeling
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Units Values for Deterministic
Estimates
Distributions for Probabilistic
Estimatesc
ADDtotal Average daily dose mg COPEC/kg BW/day Calculated output Simulated output
BW Receptor Body Weight kg (wet)Based on literature, mean BW Assumed distribution based on
literature data on BW
FIRReceptor Daily food ingestion rate for a receptor kg food (dry)/day
Calculated using allometric
relationships (Nagy, 2001) with
receptor mean BW
Assumed distribution based on
receptor BW
f i
Fraction of diet item i in the receptor's
daily diet unitless Literature-based typical dietary
compositiona
Simulated daily dietary composition
based on literature derived
preference matrix
Ci COPEC concentration in diet item i mg COPEC/kg diet item (dry)Estimated based on site-specific
UCLmean
Site-specific distribution
SIRReceptor Incidental substrate ingestion rate for a
receptor kg substrate (dry)/day
Literature-based values or
estimations (e.g., Calder and
Braun, 1983; USACHPPM, 2004,
EPA, 1993)
Assumed distribution based on
literature data
Csed COPEC concentration in substrate mg COPEC/kg substrate (dry)Site-specific UCLmean Site-specific distribution
WIRReceptor Daily water ingestion rate for a receptor L water/day
Literature-based values or
estimations (e.g., Calder and
Braun, 1983; USACHPPM, 2004,
EPA, 1993)
Assumed distribution based on
literature relationships and receptor
body weights
CSW COPEC concentration in surface water mg COPEC/L surface water (unfiltered)Site-specific UCLmean Site-specific distribution
AUF Area Use Factor unitless Based on literature data on
receptor-specific home rangeb
Based on literature data on receptor-
specific home range
Notes:
a. A single important diet item with the maximum contamination may be assumed for initial evaluations.
b. AUF, 1 may be assumed for initial evaluations.
mg - milligram
kg - kilogram
BW - body weight
L - liter
Variable
c. Depending on their importance (with respect to output sensitivity) and observed variability, point estimates may be sufficient as inputs.
1 of 1
Baseline Ecological Risk Assessment Work Plan, Badin Business Park
Appendix A Refined COPEC Screening by Ecological Exposure Area

EHS Support LLC
Appendix A Refined COPEC Screening by Ecological Exposure Area
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB Alkalinity mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Alkalinity, Carbonate (As CaCO3) ALKC Alkalinity mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Alkalinity, Total (As CaCO3) ALK Alkalinity mg/L 20 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Bromide 24959-67-9 Anions, Ion Chromatography mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chloride (As Cl) 16887-00-6 Anions, Ion Chromatography mg/L 230 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chloride (As Cl) 16887-00-6 Chloride, Total mg/L 230 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hardness (As CaCO3) HARD Total Hardness (as CaCO3) by calculation mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
pH PH pH SU 20 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Sulfate (As SO4) 14808-79-8 Anions, Ion Chromatography mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Total Hardness TOTHARD EPA 200.7 Rev 4.4 1994 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Inorganics
Cyanide 57-12-5 D7511-12 mg/L 0.005 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Cyanide 57-12-5 EPA 9012B mg/L 0.005 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Cyanide 57-12-5 SM 4500-CN mg/L 0.005 -- -- -- -- -- --0.0049 J <0.004 U <0.004 U <0.004 U 0.069 --
Cyanide 57-12-5 Total Cyanide mg/L 0.005 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Cyanide, Available 57-12-5_AVAIL OIA1677 mg/L 0.005 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Fluoride 16984-48-8 Anions, Ion Chromatography mg/L 1.8 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Fluoride 16984-48-8 EPA 300.0 mg/L 1.8 0.31 J 28.9 --23.8 --<0.25 U <0.25 U <0.25 U <0.25 U 8.8 --
Fluoride 16984-48-8 SM 4500 F C mg/L 1.8 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Metals
Antimony 7440-36-0 EPA 200.7 Rev 4.4 1994 mg/L 5.3 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Arsenic 7440-38-2 EPA 200.7 Rev 4.4 1994 mg/L 0.15 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Arsenic 7440-38-2 EPA 6010 mg/L 0.15 <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U
Barium 7440-39-3 EPA 6010 mg/L 0.22 0.0465 --0.0481 --0.0236 --0.0109 --0.0098 --0.01 --0.0146 --0.0276 --
Beryllium 7440-41-7 EPA 200.7 Rev 4.4 1994 mg/L 0.0065 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Cadmium 7440-43-9 EPA 200.7 Rev 4.4 1994 mg/L 0.000413 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Cadmium 7440-43-9 EPA 6010 mg/L 0.000413 -- -- -- -- -- --<0.0005 U <0.0005 U <0.0005 U -- -- -- --
Cadmium 7440-43-9 EPA 6010 mg/L 0.000702 <0.0005 U <0.0005 U <0.0005 U -- -- -- -- -- --<0.0005 U <0.0005 U
Calcium 7440-70-2 Metals (ICP) mg/L 116 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chromium, total 7440-47-3 EPA 200.7 Rev 4.4 1994 mg/L 0.04063 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chromium, total 7440-47-3 EPA 6010 mg/L 0.04063 -- -- -- -- -- --<0.0025 U <0.0025 U 0.0033 J -- -- -- --
Chromium, total 7440-47-3 EPA 6010 mg/L 0.07229 <0.0025 U <0.0025 U <0.0025 U -- -- -- -- -- --0.0029 J 0.0039 J
Copper 7440-50-8 EPA 200.7 Rev 4.4 1994 mg/L 0.00478 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Lead 7439-92-1 EPA 200.7 Rev 4.4 1994 mg/L 0.00112 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Lead 7439-92-1 EPA 6010 mg/L 0.00112 -- -- -- -- -- --<0.0025 U <0.0025 U <0.0025 U -- -- -- --
Lead 7439-92-1 EPA 6010 mg/L 0.00243 <0.0025 U <0.0025 U <0.0025 U -- -- -- -- -- --<0.0025 U 0.0037 J
Magnesium 7439-95-4 Metals (ICP) mg/L 82 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Mercury 7439-97-6 EPA 245.1 Rev 3.0 1994 mg/L 0.000012 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Mercury 7439-97-6 EPA 7470 mg/L 0.000012 <0.0001 U <0.0001 U <0.0001 U <0.0001 U <0.0001 U <0.0001 U <0.0001 U <0.0001 U
Nickel 7440-02-0 EPA 200.7 Rev 4.4 1994 mg/L 0.02795 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Selenium 7782-49-2 EPA 200.7 Rev 4.4 1994 mg/L 0.0151 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Selenium 7782-49-2 EPA 6010 mg/L 0.0151 <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U
Silver 7440-22-4 EPA 200.7 Rev 4.4 1994 mg/L 0.00006 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Silver 7440-22-4 EPA 6010 mg/L 0.00006 <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U
Thallium 7440-28-0 EPA 200.7 Rev 4.4 1994 mg/L 0.006 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Zinc 7440-66-6 EPA 200.7 Rev 4.4 1994 mg/L 0.06292 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PAHs
Acenaphthene 83-32-9 EPA 625.1 mg/L 0.056 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Acenaphthene 83-32-9 EPA 8270 mg/L 0.056 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Acenaphthene 83-32-9 EPA 8270D by SIM mg/L 0.056 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Acenaphthylene 208-96-8 EPA 625.1 mg/L 0.307 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Acenaphthylene 208-96-8 EPA 8270 mg/L 0.307 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/L 0.307 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Anthracene 120-12-7 EPA 625.1 mg/L 0.021 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
1 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
Anthracene 120-12-7 EPA 8270 mg/L 0.021 <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U
Anthracene 120-12-7 EPA 8270D by SIM mg/L 0.021 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[a]anthracene 56-55-3 EPA 625.1 mg/L 0.0022 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[a]anthracene 56-55-3 EPA 8270 mg/L 0.0022 <0.00072 U <0.00072 U <0.00072 U <0.00072 U <0.00072 U <0.00072 U <0.00072 U <0.00072 U
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/L 0.0022 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[a]pyrene 50-32-8 EPA 625.1 mg/L 0.00096 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[a]pyrene 50-32-8 EPA 8270 mg/L 0.00096 <0.00071 U <0.00071 U <0.00071 U <0.00071 U <0.00071 U <0.00071 U <0.00071 U <0.00071 U
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/L 0.00096 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[b]fluoranthene 205-99-2 EPA 625.1 mg/L 0.00068 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/L 0.00068 <0.00081 U <0.00081 U <0.00081 U <0.00081 U <0.00081 U <0.00081 U <0.00081 U <0.00081 U
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/L 0.00068 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[g,h,i]perylene 191-24-2 EPA 625.1 mg/L 0.00044 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/L 0.00044 <0.00097 U <0.00097 U <0.00097 U <0.00097 U <0.00097 U <0.00097 U <0.00097 U <0.00097 U
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/L 0.00044 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[k]fluoranthene 207-08-9 EPA 625.1 mg/L 0.00064 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/L 0.00064 <0.00087 U <0.00087 U <0.00087 U <0.00087 U <0.00087 U <0.00087 U <0.00087 U <0.00087 U
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/L 0.00064 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chrysene 218-01-9 EPA 625.1 mg/L 0.002 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chrysene 218-01-9 EPA 8270 mg/L 0.002 <0.00065 U <0.00065 U <0.00065 U <0.00065 U <0.00065 U <0.00065 U <0.00065 U <0.00065 U
Chrysene 218-01-9 EPA 8270D by SIM mg/L 0.002 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dibenz(A,H)Anthracene 53-70-3 EPA 625.1 mg/L 0.00028 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/L 0.00028 <0.0007 U <0.0007 U <0.0007 U <0.0007 U <0.0007 U <0.0007 U <0.0007 U <0.0007 U
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/L 0.00028 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Fluoranthene 206-44-0 EPA 625.1 mg/L 0.0071 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Fluoranthene 206-44-0 EPA 8270 mg/L 0.0071 <0.00087 U <0.00087 U <0.00087 U <0.00087 U <0.00087 U <0.00087 U <0.00087 U <0.00087 U
Fluoranthene 206-44-0 EPA 8270D by SIM mg/L 0.0071 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Fluorene 86-73-7 EPA 625.1 mg/L 0.039 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Fluorene 86-73-7 EPA 8270 mg/L 0.039 <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Fluorene 86-73-7 EPA 8270D by SIM mg/L 0.039 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 625.1 mg/L 0.00028 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/L 0.00028 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/L 0.00028 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Naphthalene 91-20-3 EPA 625.1 mg/L 0.194 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Naphthalene 91-20-3 EPA 8270 mg/L 0.194 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
Naphthalene 91-20-3 EPA 8270D by SIM mg/L 0.194 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Phenanthrene 85-01-8 EPA 625.1 mg/L 0.019 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Phenanthrene 85-01-8 EPA 8270 mg/L 0.019 <0.001 U <0.001 U <0.001 U <0.001 U <0.001 U <0.001 U <0.001 U <0.001 U
Phenanthrene 85-01-8 EPA 8270D by SIM mg/L 0.019 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pyrene 129-00-0 EPA 625.1 mg/L 0.01 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pyrene 129-00-0 EPA 8270 mg/L 0.01 <0.00053 U <0.00053 U <0.00053 U <0.00053 U <0.00053 U <0.00053 U <0.00053 U <0.00053 U
Pyrene 129-00-0 EPA 8270D by SIM mg/L 0.01 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Total HMW PAHs PAHs_highMW_ND=0 -- mg/L --<0 U <0 U <0 U <0 U <0 U <0 U <0 U <0 U
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/L --<0.00388 U <0.00388 U <0.00388 U <0.00388 U <0.00388 U <0.00388 U <0.00388 U <0.00388 U
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/L --<0.00776 U <0.00776 U <0.00776 U <0.00776 U <0.00776 U <0.00776 U <0.00776 U <0.00776 U
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/L --<0 U <0 U <0 U <0 U <0 U <0 U <0 U <0 U
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/L --<0.004785 U <0.004785 U <0.004785 U <0.004785 U <0.004785 U <0.004785 U <0.004785 U <0.004785 U
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/L --<0.00957 U <0.00957 U <0.00957 U <0.00957 U <0.00957 U <0.00957 U <0.00957 U <0.00957 U
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 608.3 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/L --<0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.001 U <0.0005 U
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 608.3 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/L --<0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.001 U <0.0005 U
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 608.3 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/L --<0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.001 U <0.0005 U
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 608.3 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/L --<0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.001 U <0.0005 U
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 608.3 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/L --<0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.001 U <0.0005 U
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 608.3 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/L --<0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.001 U <0.0005 U
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 608.3 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/L --<0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.0005 U <0.001 U <0.0005 U
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Total PCBs (Aroclors) totPCB_ND=0 -- mg/L 0.000001 <0 U <0 U <0 U <0 U <0 U <0 U <0 U <0 U
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/L 0.000001 <0.00175 U <0.00175 U <0.00175 U <0.00175 U <0.00175 U <0.00175 U <0.0035 U <0.00175 U
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/L 0.000001 <0.0035 U <0.0035 U <0.0035 U <0.0035 U <0.0035 U <0.0035 U <0.007 U <0.0035 U
PCB Congeners
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 3,4- (PCB 12) 2974-92-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 12/13 E52450566 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 3,4'- (PCB 13) 2974-90-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,2',5- (PCB 18) 37680-65-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 18/30 E52450574 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,3,3'- (PCB 20) 38444-84-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 20/28 E52450582 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,3,4- (PCB 21) 55702-46-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 21/33 E52450590 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,3',5- (PCB 26) 38444-81-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 26/29 E52450608 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,4,4'- (PCB 28) 7012-37-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,4,5- (PCB 29) 15862-07-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,4,6- (PCB 30) 35693-92-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
3 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
Trichlorobiphenyl, 2,3',4'- (PCB 33) 38444-86-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',3,3'- (PCB 40) 38444-93-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 40/41/71 E52450616 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',3,4- (PCB 41) 52663-59-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',3,5- (PCB 43) 70362-46-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 43/73 (43/73) 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',3,5'- (PCB 44) 41464-39-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 44/47/65 E52450624 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',3,6- (PCB 45) 70362-45-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 45/51 E52450632 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',4,4'- (PCB 47) 2437-79-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',4,5'- (PCB 49) 41464-40-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 49/69 E52450640 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',4,6- (PCB 50) 62796-65-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 50/53 E52450657 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',4,6'- (PCB 51) 68194-04-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',5,6'- (PCB 53) 41464-41-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,3',6- (PCB 59) 74472-33-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 59/62/75 E52450665 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,4,5- (PCB 61) 33284-53-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 61/70/74/76 E52450673 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,4,6- (PCB 62) 54230-22-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3,5,6- (PCB 65) 33284-54-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3',4,6- (PCB 69) 60233-24-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3',4',5- (PCB 70) 32598-11-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3',4',6- (PCB 71) 41464-46-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,4,4',5- (PCB 74) 32690-93-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2,4,4',6- (PCB 75) 32598-12-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 2',3,4,5- (PCB 76) 70362-48-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
4 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,4,4'- (PCB 85) 65510-45-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 85/117/116 E52450699 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,4,5- (PCB 86) 55312-69-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 86/87/97/108/119/125 E52450707 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,4,5'- (PCB 87) 38380-02-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,4,6- (PCB 88) 55215-17-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 88/91 E52450715 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,4',5- (PCB 90) 68194-07-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 90/101/113 E52450723 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,4',6- (PCB 91) 68194-05-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,5,6- (PCB 93) 73575-56-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 93/98/100/102 (93/98/100/102) 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3',4,5- (PCB 97) 41464-51-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',3',4,6- (PCB 98) 60233-25-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',4,4',6- (PCB 100) 39485-83-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',4,5,5'- (PCB 101) 37680-73-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',4,5,6'- (PCB 102) 68194-06-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,3',4',5- (PCB 107) 70424-68-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 107/124 E52450749 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,3',4,5'- (PCB 108) 70362-41-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,3',4',6- (PCB 110) 38380-03-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 110/115 E52450756 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,3',5',6- (PCB 113) 68194-10-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,4,4',6- (PCB 115) 74472-38-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,4,5,6- (PCB 116) 18259-05-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3,4',5,6- (PCB 117) 68194-11-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3',4,4',6- (PCB 119) 56558-17-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2',3,4,5,5'- (PCB 124) 70424-70-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 2',3,4,5,6- (PCB 125) 74472-39-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
5 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
Hexachlorobiphenyl, 2,2',3,3',4,4'- (PCB 128) 38380-07-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 128/166 E52450764 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,3',4,5- (PCB 129) 55215-18-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 129/138/163 (129/138/163) 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,3',5,6- (PCB 134) 52704-70-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 134/143 E52450780 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,3',5,6'- (PCB 135) 52744-13-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 135/151 (135/151) 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4,4',5'- (PCB 138) 35065-28-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4,4',6- (PCB 139) 56030-56-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 139/140 E52450806 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4,4',6'- (PCB 140) 59291-64-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4,5,6'- (PCB 143) 68194-15-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4',5,6- (PCB 147) 68194-13-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 147/149 E52450814 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4',5',6- (PCB 149) 38380-04-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,5,5',6- (PCB 151) 52663-63-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',4,4',5,5'- (PCB 153) 35065-27-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 153/168 E52450822 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 156/157 E52450830 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',4',5,6- (PCB 163) 74472-44-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3,4,4',5,6- (PCB 166) 41411-63-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 2,3',4,4',5',6- (PCB 168) 59291-65-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,3',4,4',6- (PCB 171) 52663-71-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 171/173 E52450848 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,3',4,5,6- (PCB 173) 68194-16-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
6 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,4,4',5,5'- (PCB 180) 35065-29-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 180/193 E52450855 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,4,4',5',6- (PCB 183) 52663-69-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 183/185 E52450863 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,4,5,5',6- (PCB 185) 52712-05-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlorobiphenyl, 2,3,3',4',5,5',6- (PCB 193) 69782-91-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,3',4,4',6,6'- (PCB 197) 33091-17-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 197/200 E52450871 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,3',4,5,5',6- (PCB 198) 68194-17-2 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
PCB 198/199 E52450889 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,3',4',5,5',6'- (PCB 199) 52663-75-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,3',4,5,6,6'- (PCB 200) 52663-73-7 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/L 0.000001 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/L 0.000001 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/L 0.000001 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pesticides
Aldrin 309-00-2 EPA 608.3 mg/L 0.000002 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
alpha BHC (Alpha Hexachlorocyclohexane) 319-84-6 EPA 608.3 mg/L 0.023 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Alpha Endosulfan 959-98-8 EPA 608.3 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
beta BHC (Beta Hexachlorocyclohexane) 319-85-7 EPA 608.3 mg/L 0.055 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Beta Endosulfan 33213-65-9 EPA 608.3 mg/L 0.00005 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chlordane 57-74-9 EPA 608.3 mg/L 0.000004 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
delta BHC (Delta Hexachlorocyclohexane) 319-86-8 EPA 608.3 mg/L 0.04 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dieldrin 60-57-1 EPA 608.3 mg/L 0.000002 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Endosulfan sulfate 1031-07-8 EPA 608.3 mg/L 0.00005 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Endrin 72-20-8 EPA 608.3 mg/L 0.000002 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Endrin Aldehyde 7421-93-4 EPA 608.3 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
7 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
gamma BHC (Lindane) 58-89-9 EPA 608.3 mg/L 0.00001 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlor 76-44-8 EPA 608.3 mg/L 0.000004 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Heptachlor Epoxide 1024-57-3 EPA 608.3 mg/L 0.000004 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
P,P'-DDD 72-54-8 EPA 608.3 mg/L 0.00001 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
P,P'-DDE 72-55-9 EPA 608.3 mg/L 0.0003 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
P,P'-DDT 50-29-3 EPA 608.3 mg/L 0.000001 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Toxaphene 8001-35-2 EPA 608.3 mg/L 0.0000002 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270 mg/L 0.075 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/L 0.075 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,2-Dichlorobenzene 95-50-1 EPA 625.1 mg/L 0.47 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/L 0.47 <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U
1,2-Diphenylhydrazine 122-66-7 EPA 625.1 mg/L 0.0011 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,2,4-Trichlorobenzene 120-82-1 EPA 625.1 mg/L 0.061 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/L 0.061 <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U
1,3-Dichlorobenzene 541-73-1 EPA 625.1 mg/L 0.39 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/L 0.39 <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U
1,4-Dichlorobenzene 106-46-7 EPA 625.1 mg/L 0.0094 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/L 0.0094 <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U
2-Chloronaphthalene 91-58-7 EPA 625.1 mg/L 0.11 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2-Chloronaphthalene 91-58-7 EPA 8270 mg/L 0.11 <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U
2-Chlorophenol 95-57-8 EPA 625.1 mg/L 0.018 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2-Chlorophenol 95-57-8 EPA 8270 mg/L 0.018 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
2-Methylnaphthalene 91-57-6 EPA 625.1 mg/L 0.072 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2-Methylnaphthalene 91-57-6 EPA 8270 mg/L 0.072 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/L 0.072 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/L 0.067 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
2-Nitroaniline 88-74-4 EPA 8270 mg/L 0.017 <0.0028 U <0.0028 U <0.0028 U <0.0028 U <0.0028 U <0.0028 U <0.0028 U <0.0028 U
2-Nitrophenol 88-75-5 EPA 625.1 mg/L 0.073 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2-Nitrophenol 88-75-5 EPA 8270 mg/L 0.073 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
2,4-Dichlorophenol 120-83-2 EPA 625.1 mg/L 0.011 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/L 0.011 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
2,4-Dimethylphenol 105-67-9 EPA 625.1 mg/L 0.015 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/L 0.015 <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U
2,4-Dinitrophenol 51-28-5 EPA 625.1 mg/L 0.071 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/L 0.071 <0.0065 U <0.0065 U <0.0065 U <0.0065 U <0.0065 U <0.0065 U <0.0065 U <0.0065 U
2,4-Dinitrotoluene 121-14-2 EPA 625.1 mg/L 0.044 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/L 0.044 <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U <0.0012 U
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/L 0.0019 <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U
2,4,6-Trichlorophenol 88-06-2 EPA 625.1 mg/L 0.0049 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/L 0.0049 <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U
2,6-Dinitrotoluene 606-20-2 EPA 625.1 mg/L 0.081 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/L 0.081 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
3- & 4-Methylphenol edms_0009 EPA 625.1 mg/L 0.053 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
3- & 4-Methylphenol edms_0009 EPA 8270 mg/L 0.053 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
3-Nitroaniline 99-09-2 EPA 8270 mg/L --<0.0024 U <0.0024 U <0.0024 U <0.0024 U <0.0024 U <0.0024 U <0.0024 U <0.0024 U
3,3'-Dichlorobenzidine 91-94-1 EPA 625.1 mg/L 0.0045 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/L 0.0045 <0.0014 U <0.0014 U <0.0014 U <0.0014 U <0.0014 U <0.0014 U <0.0014 U <0.0014 U
4-Bromophenyl Phenyl Ether 101-55-3 EPA 625.1 mg/L 0.002 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/L 0.002 <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U
4-Chloro-3-Methylphenol 59-50-7 EPA 625.1 mg/L 0.001 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/L 0.001 <0.0042 U <0.0042 U <0.0042 U <0.0042 U <0.0042 U <0.0042 U <0.0042 U <0.0042 U
4-Chloroaniline 106-47-8 EPA 8270 mg/L 0.0008 <0.0034 U <0.0034 U <0.0034 U <0.0034 U <0.0034 U <0.0034 U <0.0034 U <0.0034 U
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 625.1 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/L --<0.0021 U <0.0021 U <0.0021 U <0.0021 U <0.0021 U <0.0021 U <0.0021 U <0.0021 U
8 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
4-Nitroaniline 100-01-6 EPA 8270 mg/L --<0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U
4-Nitrophenol 100-02-7 EPA 625.1 mg/L 0.058 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
4-Nitrophenol 100-02-7 EPA 8270 mg/L 0.058 <0.0058 U <0.0058 U <0.0058 U <0.0058 U <0.0058 U <0.0058 U <0.0058 U <0.0058 U
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 625.1 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/L --<0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/L 0.0041 <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U
Benzidine 92-87-5 EPA 625.1 mg/L 0.0015 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzoic acid 65-85-0 EPA 8270 mg/L 9 <0.0111 U <0.0111 U <0.0111 U <0.0111 U <0.0111 U <0.0111 U <0.0111 U <0.0111 U
Benzyl Alcohol 100-51-6 EPA 8270 mg/L 0.5 <0.0034 U <0.0034 U <0.0034 U <0.0034 U <0.0034 U <0.0034 U <0.0034 U <0.0034 U
Benzyl Butyl Phthalate 85-68-7 EPA 625.1 mg/L 0.019 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/L 0.019 <0.00075 U <0.00075 U <0.00075 U <0.00075 U <0.00075 U <0.00075 U <0.00075 U <0.00075 U
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 625.1 mg/L 9.2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/L 9.2 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 625.1 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/L --<0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 625.1 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/L --<0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 625.1 mg/L 0.005 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/L 0.005 <0.00085 U 0.0141 --<0.00085 U <0.00085 U <0.00085 U <0.00085 U <0.00085 U <0.00085 U
Di-N-Butyl Phthalate 84-74-2 EPA 625.1 mg/L 0.0095 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/L 0.0095 <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U
Di-N-Octylphthalate 117-84-0 EPA 625.1 mg/L 0.215 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/L 0.215 <0.00086 U <0.00086 U <0.00086 U <0.00086 U <0.00086 U <0.00086 U <0.00086 U <0.00086 U
Dibenzofuran 132-64-9 EPA 8270 mg/L 0.004 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
Diethyl Phthalate 84-66-2 EPA 625.1 mg/L 1.2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Diethyl Phthalate 84-66-2 EPA 8270 mg/L 1.2 <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U
Dimethyl Phthalate 131-11-3 EPA 625.1 mg/L 3.4 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dimethyl Phthalate 131-11-3 EPA 8270 mg/L 3.4 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
Hexachlorobenzene 118-74-1 EPA 625.1 mg/L 0.00015 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobenzene 118-74-1 EPA 8270 mg/L 0.00015 <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U <0.0011 U
Hexachlorobutadiene 87-68-3 EPA 625.1 mg/L 0.001 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorobutadiene 87-68-3 EPA 8270 mg/L 0.001 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
Hexachlorocyclopentadiene 77-47-4 EPA 625.1 mg/L 0.00007 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/L 0.00007 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
Hexachloroethane 67-72-1 EPA 625.1 mg/L 0.012 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Hexachloroethane 67-72-1 EPA 8270 mg/L 0.012 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
Isophorone 78-59-1 EPA 625.1 mg/L 0.92 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Isophorone 78-59-1 EPA 8270 mg/L 0.92 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
N-Nitrosodi-N-Propylamine 621-64-7 EPA 625.1 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/L --<0.0021 U <0.0021 U <0.0021 U <0.0021 U <0.0021 U <0.0021 U <0.0021 U <0.0021 U
N-Nitrosodimethylamine 62-75-9 EPA 625.1 mg/L 17 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/L 17 <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U
N-Nitrosodiphenylamine 86-30-6 EPA 625.1 mg/L 0.29 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/L 0.29 <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U
Nitrobenzene 98-95-3 EPA 625.1 mg/L 4.6 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Nitrobenzene 98-95-3 EPA 8270 mg/L 4.6 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Pentachlorophenol 87-86-5 EPA 625.1 mg/L 0.015 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Pentachlorophenol 87-86-5 EPA 8270 mg/L 0.015 <0.0023 U <0.0023 U <0.0023 U <0.0023 U <0.0023 U <0.0023 U <0.0023 U <0.0023 U
Phenol 108-95-2 EPA 420.4 Rev 1.0 1993 mg/L 0.16 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Phenol 108-95-2 EPA 625.1 mg/L 0.16 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Phenol 108-95-2 EPA 8270 mg/L 0.16 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
VOCs
1,1-Dichloroethane 75-34-3 EPA 624 mg/L 0.41 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,1-Dichloroethane 75-34-3 EPA 8260 mg/L 0.41 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
1,1-Dichloroethene 75-35-4 EPA 624 mg/L 0.13 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
9 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
1,1-Dichloroethene 75-35-4 EPA 8260 mg/L 0.13 <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U
1,1-Dichloropropene 563-58-6 EPA 8260 mg/L --<0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
1,1,1-Trichloroethane 71-55-6 EPA 624 mg/L 2.5 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/L 2.5 <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/L 0.085 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
1,1,2-Trichloroethane 79-00-5 EPA 624 mg/L 2.3 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/L 2.3 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
1,1,2,2-Tetrachloroethane 79-34-5 EPA 624 mg/L 0.2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/L 0.2 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/L --<0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/L --<0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
1,2-Dichlorobenzene 95-50-1 EPA 624 mg/L 0.47 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/L 0.47 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
1,2-Dichloroethane 107-06-2 EPA 624 mg/L 2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,2-Dichloroethane 107-06-2 EPA 8260 mg/L 2 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
1,2-dichloroethene (cis+trans) 540-59-0 EPA 8260 mg/L 0.97 <0.0044 U <0.0044 U <0.0044 U <0.0044 U <0.0044 U <0.0044 U <0.0044 U <0.0044 U
1,2-Dichloropropane 78-87-5 EPA 624 mg/L 0.52 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,2-Dichloropropane 78-87-5 EPA 8260 mg/L 0.52 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/L 0.008 <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/L --<0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
1,2,4-Trichlorobenzene 120-82-1 EPA 624 mg/L 0.061 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/L 0.061 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/L 0.39 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
1,3-Dichlorobenzene 541-73-1 EPA 624 mg/L 0.39 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/L 0.39 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
1,3-Dichloropropane 142-28-9 EPA 8260 mg/L --<0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/L 0.63 <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U <0.0013 U
1,4-Dichlorobenzene 106-46-7 EPA 624 mg/L 0.0094 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/L 0.0094 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
2-Chloroethyl Vinyl Ether 110-75-8 EPA 624 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
2-Chlorotoluene 95-49-8 EPA 8260 mg/L --<0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
2-Hexanone 591-78-6 EPA 8260 mg/L 0.099 <0.0038 U <0.0038 U <0.0038 U <0.0038 U <0.0038 U <0.0038 U <0.0038 U <0.0038 U
2,2-Dichloropropane 594-20-7 EPA 8260 mg/L --<0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
4-Chlorotoluene 106-43-4 EPA 8260 mg/L --<0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Acetone 67-64-1 EPA 8260 mg/L 2 <0.01 U <0.01 U 0.01 J <0.01 U <0.01 U <0.01 U <0.01 U <0.01 U
Acrolein 107-02-8 EPA 624 mg/L 0.003 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Acrylonitrile 107-13-1 EPA 624 mg/L 0.42 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzene 71-43-2 EPA 624 mg/L 0.16 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Benzene 71-43-2 EPA 8260 mg/L 0.16 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Bromobenzene 108-86-1 EPA 8260 mg/L --<0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
Bromochloromethane 74-97-5 EPA 8260 mg/L --<0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U <0.0022 U
Bromodichloromethane 75-27-4 EPA 624 mg/L 0.34 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Bromodichloromethane 75-27-4 EPA 8260 mg/L 0.34 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Bromoform 75-25-2 EPA 624 mg/L 0.23 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Bromoform 75-25-2 EPA 8260 mg/L 0.23 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
Bromomethane 74-83-9 EPA 624 mg/L 0.00004 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Bromomethane 74-83-9 EPA 8260 mg/L 0.00004 <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U
Carbon Tetrachloride 56-23-5 EPA 624 mg/L 0.077 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Carbon Tetrachloride 56-23-5 EPA 8260 mg/L 0.077 <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U
Chlorobenzene 108-90-7 EPA 624 mg/L 0.14 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chlorobenzene 108-90-7 EPA 8260 mg/L 0.14 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Chloroethane 75-00-3 EPA 624 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chloroethane 75-00-3 EPA 8260 mg/L --<0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Chloroform 67-66-3 EPA 624 mg/L 0.14 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chloroform 67-66-3 EPA 8260 mg/L 0.14 <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U
10 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/L) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
ABL-ML001
WY Wetland /SB Ditch
ABL-ML001-F004
92259990
7/21/2015
15:25:00
Yes
Yes
ABL-ML002
WC Wetland /WC Ditch
ABL-ML002-F004
92259990
7/21/2015
16:15:00
Yes
Yes
Chemical Name CAS-RN Method Units
17:15:00
Yes
Yes
ABL-SW001
Little Mountain Creek
ABL-SW001-F004
92259990
7/21/2015
8:55:00
Yes
Yes
ABL-ML003
Eastern Drainage Ditch
ABL-ML003-F004
92259990
7/21/2015
10:00:00
Yes
Yes
ABL-SW003Upgradient Little
Mountain CreekABL-SW003-F004
92259990
7/21/2015
11:05:00
Yes
Yes
ABL-SW002
Little Mountain Creek
ABL-SW002-F004
92259990
7/21/2015
12:05:00
Yes
Yes
ABL-SW006
Eastern Drainage Ditch
ABL-SW006-F004
92259990
7/21/2015
13:55:00
Yes
Yes
ABL-SW004
WB Wetland /SB Ditch
ABL-SW004-F004
92259990
7/21/2015
Chloromethane 74-87-3 EPA 624 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Chloromethane 74-87-3 EPA 8260 mg/L --<0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/L 0.62 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
cis-1,3-Dichloropropene 10061-01-5 EPA 624 mg/L 0.0017 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/L 0.0017 <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Dibromochloromethane 124-48-1 EPA 624 mg/L 0.32 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Dibromochloromethane 124-48-1 EPA 8260 mg/L 0.32 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
Dibromomethane 74-95-3 EPA 8260 mg/L --<0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/L --<0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Ethylbenzene 100-41-4 EPA 624 mg/L 0.097 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Ethylbenzene 100-41-4 EPA 8260 mg/L 0.097 <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Hexachlorobutadiene 87-68-3 EPA 8260 mg/L 0.001 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
Isopropyl Ether 108-20-3 EPA 8260 mg/L 20 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/L 0.25 <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
M,P-Xylene 179601-23-1 EPA 8260 mg/L 0.42 <0.0031 U <0.0031 U <0.0031 U <0.0031 U <0.0031 U <0.0031 U <0.0031 U <0.0031 U
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/L 26 <0.0049 U <0.0049 U <0.0049 U <0.0049 U <0.0049 U <0.0049 U <0.0049 U <0.0049 U
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/L 26 <0.0036 U <0.0036 U <0.0036 U <0.0036 U <0.0036 U <0.0036 U <0.0036 U <0.0036 U
Methylene Chloride 75-09-2 EPA 624 mg/L 11 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Methylene Chloride 75-09-2 EPA 8260 mg/L 11 <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U
N-Butylbenzene 104-51-8 EPA 8260 mg/L 0.0039 <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U <0.0019 U
N-Propylbenzene 103-65-1 EPA 8260 mg/L 0.08 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
Naphthalene 91-20-3 EPA 8260 mg/L 0.194 <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/L 0.6 <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/L 0.32 <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Sec-Butylbenzene 135-98-8 EPA 8260 mg/L --<0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Styrene 100-42-5 EPA 8260 mg/L 0.032 <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
T-Butylbenzene 98-06-6 EPA 8260 mg/L --<0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Tert-Butyl Alcohol 75-65-0 EPA 8260 mg/L --<0.0577 U <0.0577 U <0.0577 U <0.0577 U <0.0577 U <0.0577 U <0.0577 U <0.0577 U
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/L 34 <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Tetrachloroethylene 127-18-4 EPA 624 mg/L 0.053 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Tetrachloroethylene 127-18-4 EPA 8260 mg/L 0.053 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
Toluene 108-88-3 EPA 624 mg/L 0.011 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Toluene 108-88-3 EPA 8260 mg/L 0.011 <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
trans-1,2-Dichloroethene 156-60-5 EPA 624 mg/L 0.558 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/L 0.558 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
trans-1,3-Dichloropropene 10061-02-6 EPA 624 mg/L 0.0017 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/L 0.0017 <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U <0.0016 U
Trichloroethylene 79-01-6 EPA 624 mg/L 0.22 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichloroethylene 79-01-6 EPA 8260 mg/L 0.22 <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U <0.0018 U
Trichlorofluoromethane 75-69-4 EPA 624 mg/L ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Trichlorofluoromethane 75-69-4 EPA 8260 mg/L --<0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U <0.0017 U
Vinyl Acetate 108-05-4 EPA 8260 mg/L 0.016 <0.0023 U <0.0023 U <0.0023 U <0.0023 U <0.0023 U <0.0023 U <0.0023 U <0.0023 U
Vinyl Chloride 75-01-4 EPA 624 mg/L 0.93 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Vinyl Chloride 75-01-4 EPA 8260 mg/L 0.93 <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U <0.0015 U
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
11 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB Alkalinity mg/L
Alkalinity, Carbonate (As CaCO3) ALKC Alkalinity mg/L
Alkalinity, Total (As CaCO3) ALK Alkalinity mg/L
Bromide 24959-67-9 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Chloride, Total mg/L
Hardness (As CaCO3) HARD Total Hardness (as CaCO3) by calculation mg/L
pH PH pH SU
Sulfate (As SO4) 14808-79-8 Anions, Ion Chromatography mg/L
Total Hardness TOTHARD EPA 200.7 Rev 4.4 1994 mg/L
Inorganics
Cyanide 57-12-5 D7511-12 mg/L
Cyanide 57-12-5 EPA 9012B mg/L
Cyanide 57-12-5 SM 4500-CN mg/L
Cyanide 57-12-5 Total Cyanide mg/L
Cyanide, Available 57-12-5_AVAIL OIA1677 mg/L
Fluoride 16984-48-8 Anions, Ion Chromatography mg/L
Fluoride 16984-48-8 EPA 300.0 mg/L
Fluoride 16984-48-8 SM 4500 F C mg/L
Metals
Antimony 7440-36-0 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 6010 mg/L
Barium 7440-39-3 EPA 6010 mg/L
Beryllium 7440-41-7 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Calcium 7440-70-2 Metals (ICP) mg/L
Chromium, total 7440-47-3 EPA 200.7 Rev 4.4 1994 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Copper 7440-50-8 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Magnesium 7439-95-4 Metals (ICP) mg/L
Mercury 7439-97-6 EPA 245.1 Rev 3.0 1994 mg/L
Mercury 7439-97-6 EPA 7470 mg/L
Nickel 7440-02-0 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 6010 mg/L
Silver 7440-22-4 EPA 200.7 Rev 4.4 1994 mg/L
Silver 7440-22-4 EPA 6010 mg/L
Thallium 7440-28-0 EPA 200.7 Rev 4.4 1994 mg/L
Zinc 7440-66-6 EPA 200.7 Rev 4.4 1994 mg/L
PAHs
Acenaphthene 83-32-9 EPA 625.1 mg/L
Acenaphthene 83-32-9 EPA 8270 mg/L
Acenaphthene 83-32-9 EPA 8270D by SIM mg/L
Acenaphthylene 208-96-8 EPA 625.1 mg/L
Acenaphthylene 208-96-8 EPA 8270 mg/L
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/L
Anthracene 120-12-7 EPA 625.1 mg/L
Chemical Name CAS-RN Method Units
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
-- --41 -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<5 U -- -- -- -- -- -- -- -- -- -- -- --
-- --42 -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.4 U -- -- -- -- -- -- -- -- -- -- -- --
-- --5.5 -- -- -- -- -- -- -- -- -- -- -- -- --
-- --5.6 -- -- -- -- -- -- -- -- -- -- -- -- --
-- --48 -- -- -- -- -- -- -- -- -- -- -- -- --
-- --7.5 -- -- -- -- -- -- -- -- -- -- -- -- --
-- --6.3 -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --37.8 --20.9 --22 -- -- --
<0.002 U -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.004 U <0.004 U <0.004 U -- --
-- -- -- -- -- --<0.004 U -- -- -- -- -- -- -- --
-- --<0.002 U -- -- -- -- -- -- -- -- -- -- -- --
<0.0015 U -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.17 J -- -- -- -- -- -- -- -- -- -- -- --
0.15 -- -- -- -- -- -- --0.088 J <0.05 U 0.063 J -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0039 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.005 U <0.005 U <0.005 U <0.005 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --11 -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U 0.0026 J <0.0025 U <0.0025 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --4.9 -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00007 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.005 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00025 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00021 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00014 U -- -- -- -- -- -- -- --
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
12 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Anthracene 120-12-7 EPA 8270 mg/L
Anthracene 120-12-7 EPA 8270D by SIM mg/L
Benzo[a]anthracene 56-55-3 EPA 625.1 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/L
Benzo[a]pyrene 50-32-8 EPA 625.1 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/L
Benzo[b]fluoranthene 205-99-2 EPA 625.1 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 625.1 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/L
Benzo[k]fluoranthene 207-08-9 EPA 625.1 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/L
Chrysene 218-01-9 EPA 625.1 mg/L
Chrysene 218-01-9 EPA 8270 mg/L
Chrysene 218-01-9 EPA 8270D by SIM mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 625.1 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/L
Fluoranthene 206-44-0 EPA 625.1 mg/L
Fluoranthene 206-44-0 EPA 8270 mg/L
Fluoranthene 206-44-0 EPA 8270D by SIM mg/L
Fluorene 86-73-7 EPA 625.1 mg/L
Fluorene 86-73-7 EPA 8270 mg/L
Fluorene 86-73-7 EPA 8270D by SIM mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 625.1 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/L
Naphthalene 91-20-3 EPA 625.1 mg/L
Naphthalene 91-20-3 EPA 8270 mg/L
Naphthalene 91-20-3 EPA 8270D by SIM mg/L
Phenanthrene 85-01-8 EPA 625.1 mg/L
Phenanthrene 85-01-8 EPA 8270 mg/L
Phenanthrene 85-01-8 EPA 8270D by SIM mg/L
Pyrene 129-00-0 EPA 625.1 mg/L
Pyrene 129-00-0 EPA 8270 mg/L
Pyrene 129-00-0 EPA 8270D by SIM mg/L
Total HMW PAHs PAHs_highMW_ND=0 -- mg/L
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/L
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/L
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/L
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 608.3 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 608.3 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0053 -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0013 J -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0015 J -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00038 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0017 J -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0057 -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00055 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00021 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00021 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00029 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00034 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00022 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0012 J -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0167 -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.01731 -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.01792 -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00079 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00158 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
13 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 608.3 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 608.3 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 608.3 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 608.3 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/L
Total PCBs (Aroclors) totPCB_ND=0 -- mg/L
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/L
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/L
PCB Congeners
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/L
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/L
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/L
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/L
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/L
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/L
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/L
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/L
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/L
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/L
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/L
Dichlorobiphenyl, 3,4- (PCB 12) 2974-92-7 1668A mg/L
PCB 12/13 E52450566 1668A mg/L
Dichlorobiphenyl, 3,4'- (PCB 13) 2974-90-5 1668A mg/L
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/L
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/L
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/L
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/L
Trichlorobiphenyl, 2,2',5- (PCB 18) 37680-65-2 1668A mg/L
PCB 18/30 E52450574 1668A mg/L
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/L
Trichlorobiphenyl, 2,3,3'- (PCB 20) 38444-84-7 1668A mg/L
PCB 20/28 E52450582 1668A mg/L
Trichlorobiphenyl, 2,3,4- (PCB 21) 55702-46-0 1668A mg/L
PCB 21/33 E52450590 1668A mg/L
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/L
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/L
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/L
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/L
Trichlorobiphenyl, 2,3',5- (PCB 26) 38444-81-4 1668A mg/L
PCB 26/29 E52450608 1668A mg/L
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/L
Trichlorobiphenyl, 2,4,4'- (PCB 28) 7012-37-5 1668A mg/L
Trichlorobiphenyl, 2,4,5- (PCB 29) 15862-07-4 1668A mg/L
Trichlorobiphenyl, 2,4,6- (PCB 30) 35693-92-6 1668A mg/L
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/L
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- --
-- -- -- -- -- --<0 U <0 U -- -- -- -- -- --
-- -- -- -- -- --<0.00175 U <0.00147 U -- -- -- -- -- --
-- -- -- -- -- --<0.0035 U <0.00294 U -- -- -- -- -- --
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --0.000000357 -- -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --0.000000331 -- -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.00000266 U -- -- -- -- -- -- -- --<0.00000244 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --0.000000959 -- -- -- -- -- -- -- -- --<0.000000329 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --0.000000694 -- -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- -- -- --
-- -- -- --0.000000289 -- -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000129 U
-- -- -- --0.00000143 -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000135 U
-- -- -- --<0.00000147 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- --<0.000000948 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000129 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.00000141 U -- -- -- -- -- -- -- --<0.0000013 U
-- -- -- --0.000000519 -- -- -- -- -- -- -- -- --<0.000000249 U
14 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Trichlorobiphenyl, 2,3',4'- (PCB 33) 38444-86-9 1668A mg/L
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/L
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/L
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/L
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/L
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/L
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,3'- (PCB 40) 38444-93-8 1668A mg/L
PCB 40/41/71 E52450616 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4- (PCB 41) 52663-59-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5- (PCB 43) 70362-46-8 1668A mg/L
PCB 43/73 (43/73) 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5'- (PCB 44) 41464-39-5 1668A mg/L
PCB 44/47/65 E52450624 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6- (PCB 45) 70362-45-7 1668A mg/L
PCB 45/51 E52450632 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,4'- (PCB 47) 2437-79-8 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5'- (PCB 49) 41464-40-8 1668A mg/L
PCB 49/69 E52450640 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6- (PCB 50) 62796-65-0 1668A mg/L
PCB 50/53 E52450657 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6'- (PCB 51) 68194-04-7 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,6'- (PCB 53) 41464-41-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',6- (PCB 59) 74472-33-6 1668A mg/L
PCB 59/62/75 E52450665 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,5- (PCB 61) 33284-53-6 1668A mg/L
PCB 61/70/74/76 E52450673 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,6- (PCB 62) 54230-22-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,5,6- (PCB 65) 33284-54-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,6- (PCB 69) 60233-24-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',5- (PCB 70) 32598-11-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',6- (PCB 71) 41464-46-4 1668A mg/L
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',5- (PCB 74) 32690-93-0 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',6- (PCB 75) 32598-12-2 1668A mg/L
Tetrachlorobiphenyl, 2',3,4,5- (PCB 76) 70362-48-0 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000135 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000575 U -- -- -- -- -- -- -- --<0.000000529 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- --<0.000000271 U -- -- -- -- -- -- -- --<0.000000249 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.00000163 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --0.000000615 -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --0.00000292 -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --0.00000177 -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --0.00000221 -- -- -- -- -- -- -- -- --<0.00000154 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --0.00000127 -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.00000163 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000002 U
-- -- -- --0.00000379 -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --0.00000106 -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --0.00000319 -- -- -- -- -- -- -- -- --<0.000000838 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000002 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000002 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000002 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
15 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/L
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,4'- (PCB 85) 65510-45-4 1668A mg/L
PCB 85/117/116 E52450699 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5- (PCB 86) 55312-69-1 1668A mg/L
PCB 86/87/97/108/119/125 E52450707 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5'- (PCB 87) 38380-02-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6- (PCB 88) 55215-17-3 1668A mg/L
PCB 88/91 E52450715 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',5- (PCB 90) 68194-07-0 1668A mg/L
PCB 90/101/113 E52450723 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',6- (PCB 91) 68194-05-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6- (PCB 93) 73575-56-1 1668A mg/L
PCB 93/98/100/102 (93/98/100/102) 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/L
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,5- (PCB 97) 41464-51-1 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,6- (PCB 98) 60233-25-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',6- (PCB 100) 39485-83-1 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,5'- (PCB 101) 37680-73-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,6'- (PCB 102) 68194-06-9 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/L
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',5- (PCB 107) 70424-68-9 1668A mg/L
PCB 107/124 E52450749 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5'- (PCB 108) 70362-41-3 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',6- (PCB 110) 38380-03-9 1668A mg/L
PCB 110/115 E52450756 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5',6- (PCB 113) 68194-10-5 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',6- (PCB 115) 74472-38-1 1668A mg/L
Pentachlorobiphenyl, 2,3,4,5,6- (PCB 116) 18259-05-7 1668A mg/L
Pentachlorobiphenyl, 2,3,4',5,6- (PCB 117) 68194-11-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',6- (PCB 119) 56558-17-9 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/L
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/L
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,5'- (PCB 124) 70424-70-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,6- (PCB 125) 74472-39-2 1668A mg/L
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/L
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.00000163 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000299 U
-- -- -- --<0.00000326 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000299 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --0.00000174 -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000002 U
-- -- -- --<0.00000217 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --0.00000125 -- -- -- -- -- -- -- -- --<0.000000948 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000299 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000002 U
-- -- -- --0.00000139 -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000002 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000002 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --0.000000897 -- -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000299 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --0.00000234 -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --0.00000174 -- -- -- -- -- -- -- -- --<0.000000638 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000299 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00000299 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
16 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Hexachlorobiphenyl, 2,2',3,3',4,4'- (PCB 128) 38380-07-3 1668A mg/L
PCB 128/166 E52450764 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5- (PCB 129) 55215-18-4 1668A mg/L
PCB 129/138/163 (129/138/163) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6- (PCB 134) 52704-70-8 1668A mg/L
PCB 134/143 E52450780 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6'- (PCB 135) 52744-13-5 1668A mg/L
PCB 135/151 (135/151) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5'- (PCB 138) 35065-28-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6- (PCB 139) 56030-56-9 1668A mg/L
PCB 139/140 E52450806 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6'- (PCB 140) 59291-64-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6'- (PCB 143) 68194-15-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6- (PCB 147) 68194-13-8 1668A mg/L
PCB 147/149 E52450814 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5',6- (PCB 149) 38380-04-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,5',6- (PCB 151) 52663-63-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,5'- (PCB 153) 35065-27-1 1668A mg/L
PCB 153/168 E52450822 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 1668A mg/L
PCB 156/157 E52450830 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,6- (PCB 163) 74472-44-9 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/L
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/L
Hexachlorobiphenyl, 2,3,4,4',5,6- (PCB 166) 41411-63-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5',6- (PCB 168) 59291-65-5 1668A mg/L
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',6- (PCB 171) 52663-71-5 1668A mg/L
PCB 171/173 E52450848 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,6- (PCB 173) 68194-16-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.00000163 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
17 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,5'- (PCB 180) 35065-29-3 1668A mg/L
PCB 180/193 E52450855 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5',6- (PCB 183) 52663-69-1 1668A mg/L
PCB 183/185 E52450863 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,5',6- (PCB 185) 52712-05-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4',5,5',6- (PCB 193) 69782-91-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',6,6'- (PCB 197) 33091-17-7 1668A mg/L
PCB 197/200 E52450871 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,5',6- (PCB 198) 68194-17-2 1668A mg/L
PCB 198/199 E52450889 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4',5,5',6'- (PCB 199) 52663-75-9 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,6,6'- (PCB 200) 52663-73-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/L
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/L
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/L
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/L
Pesticides
Aldrin 309-00-2 EPA 608.3 mg/L
alpha BHC (Alpha Hexachlorocyclohexane) 319-84-6 EPA 608.3 mg/L
Alpha Endosulfan 959-98-8 EPA 608.3 mg/L
beta BHC (Beta Hexachlorocyclohexane) 319-85-7 EPA 608.3 mg/L
Beta Endosulfan 33213-65-9 EPA 608.3 mg/L
Chlordane 57-74-9 EPA 608.3 mg/L
delta BHC (Delta Hexachlorocyclohexane) 319-86-8 EPA 608.3 mg/L
Dieldrin 60-57-1 EPA 608.3 mg/L
Endosulfan sulfate 1031-07-8 EPA 608.3 mg/L
Endrin 72-20-8 EPA 608.3 mg/L
Endrin Aldehyde 7421-93-4 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.00000109 U -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- --<0.000000543 U -- -- -- -- -- -- -- --<0.000000499 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.000000998 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.00000163 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.00000163 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0000015 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --<0.000000814 U -- -- -- -- -- -- -- --<0.000000748 U
-- -- -- --0.000030761 -- -- -- -- -- -- -- -- --<0 U
-- -- -- --0.000079833 -- -- -- -- -- -- -- -- --<0.000087263 U
-- -- -- --0.000128905 -- -- -- -- -- -- -- -- --<0.000174526 U
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
18 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
gamma BHC (Lindane) 58-89-9 EPA 608.3 mg/L
Heptachlor 76-44-8 EPA 608.3 mg/L
Heptachlor Epoxide 1024-57-3 EPA 608.3 mg/L
P,P'-DDD 72-54-8 EPA 608.3 mg/L
P,P'-DDE 72-55-9 EPA 608.3 mg/L
P,P'-DDT 50-29-3 EPA 608.3 mg/L
Toxaphene 8001-35-2 EPA 608.3 mg/L
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270 mg/L
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/L
1,2-Dichlorobenzene 95-50-1 EPA 625.1 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/L
1,2-Diphenylhydrazine 122-66-7 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 625.1 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 625.1 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/L
2-Chloronaphthalene 91-58-7 EPA 625.1 mg/L
2-Chloronaphthalene 91-58-7 EPA 8270 mg/L
2-Chlorophenol 95-57-8 EPA 625.1 mg/L
2-Chlorophenol 95-57-8 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 625.1 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/L
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/L
2-Nitroaniline 88-74-4 EPA 8270 mg/L
2-Nitrophenol 88-75-5 EPA 625.1 mg/L
2-Nitrophenol 88-75-5 EPA 8270 mg/L
2,4-Dichlorophenol 120-83-2 EPA 625.1 mg/L
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/L
2,4-Dimethylphenol 105-67-9 EPA 625.1 mg/L
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/L
2,4-Dinitrophenol 51-28-5 EPA 625.1 mg/L
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 625.1 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/L
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 625.1 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 625.1 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/L
3- & 4-Methylphenol edms_0009 EPA 625.1 mg/L
3- & 4-Methylphenol edms_0009 EPA 8270 mg/L
3-Nitroaniline 99-09-2 EPA 8270 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 625.1 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 625.1 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 625.1 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/L
4-Chloroaniline 106-47-8 EPA 8270 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 625.1 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0009 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00098 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0013 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00028 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00091 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0012 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.009 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0009 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0013 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00098 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.002 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0021 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00082 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0037 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00087 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
19 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
4-Nitroaniline 100-01-6 EPA 8270 mg/L
4-Nitrophenol 100-02-7 EPA 625.1 mg/L
4-Nitrophenol 100-02-7 EPA 8270 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 625.1 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/L
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/L
Benzidine 92-87-5 EPA 625.1 mg/L
Benzoic acid 65-85-0 EPA 8270 mg/L
Benzyl Alcohol 100-51-6 EPA 8270 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 625.1 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 625.1 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 625.1 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 625.1 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 625.1 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 625.1 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/L
Di-N-Octylphthalate 117-84-0 EPA 625.1 mg/L
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/L
Dibenzofuran 132-64-9 EPA 8270 mg/L
Diethyl Phthalate 84-66-2 EPA 625.1 mg/L
Diethyl Phthalate 84-66-2 EPA 8270 mg/L
Dimethyl Phthalate 131-11-3 EPA 625.1 mg/L
Dimethyl Phthalate 131-11-3 EPA 8270 mg/L
Hexachlorobenzene 118-74-1 EPA 625.1 mg/L
Hexachlorobenzene 118-74-1 EPA 8270 mg/L
Hexachlorobutadiene 87-68-3 EPA 625.1 mg/L
Hexachlorobutadiene 87-68-3 EPA 8270 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 625.1 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/L
Hexachloroethane 67-72-1 EPA 625.1 mg/L
Hexachloroethane 67-72-1 EPA 8270 mg/L
Isophorone 78-59-1 EPA 625.1 mg/L
Isophorone 78-59-1 EPA 8270 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 625.1 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 625.1 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 625.1 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/L
Nitrobenzene 98-95-3 EPA 625.1 mg/L
Nitrobenzene 98-95-3 EPA 8270 mg/L
Pentachlorophenol 87-86-5 EPA 625.1 mg/L
Pentachlorophenol 87-86-5 EPA 8270 mg/L
Phenol 108-95-2 EPA 420.4 Rev 1.0 1993 mg/L
Phenol 108-95-2 EPA 625.1 mg/L
Phenol 108-95-2 EPA 8270 mg/L
VOCs
1,1-Dichloroethane 75-34-3 EPA 624 mg/L
1,1-Dichloroethane 75-34-3 EPA 8260 mg/L
1,1-Dichloroethene 75-35-4 EPA 624 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0098 J -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0026 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0051 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0061 -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00092 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.001 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00095 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0048 J -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00075 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0019 J -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00058 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00076 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00072 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00094 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00088 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0011 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00089 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00099 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00091 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.001 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0011 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0046 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.009 J -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- --
20 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
1,1-Dichloroethene 75-35-4 EPA 8260 mg/L
1,1-Dichloropropene 563-58-6 EPA 8260 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 624 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/L
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 624 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 624 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/L
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/L
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 624 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/L
1,2-Dichloroethane 107-06-2 EPA 624 mg/L
1,2-Dichloroethane 107-06-2 EPA 8260 mg/L
1,2-dichloroethene (cis+trans) 540-59-0 EPA 8260 mg/L
1,2-Dichloropropane 78-87-5 EPA 624 mg/L
1,2-Dichloropropane 78-87-5 EPA 8260 mg/L
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/L
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 624 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/L
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 624 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/L
1,3-Dichloropropane 142-28-9 EPA 8260 mg/L
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 624 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/L
2-Chloroethyl Vinyl Ether 110-75-8 EPA 624 mg/L
2-Chlorotoluene 95-49-8 EPA 8260 mg/L
2-Hexanone 591-78-6 EPA 8260 mg/L
2,2-Dichloropropane 594-20-7 EPA 8260 mg/L
4-Chlorotoluene 106-43-4 EPA 8260 mg/L
Acetone 67-64-1 EPA 8260 mg/L
Acrolein 107-02-8 EPA 624 mg/L
Acrylonitrile 107-13-1 EPA 624 mg/L
Benzene 71-43-2 EPA 624 mg/L
Benzene 71-43-2 EPA 8260 mg/L
Bromobenzene 108-86-1 EPA 8260 mg/L
Bromochloromethane 74-97-5 EPA 8260 mg/L
Bromodichloromethane 75-27-4 EPA 624 mg/L
Bromodichloromethane 75-27-4 EPA 8260 mg/L
Bromoform 75-25-2 EPA 624 mg/L
Bromoform 75-25-2 EPA 8260 mg/L
Bromomethane 74-83-9 EPA 624 mg/L
Bromomethane 74-83-9 EPA 8260 mg/L
Carbon Tetrachloride 56-23-5 EPA 624 mg/L
Carbon Tetrachloride 56-23-5 EPA 8260 mg/L
Chlorobenzene 108-90-7 EPA 624 mg/L
Chlorobenzene 108-90-7 EPA 8260 mg/L
Chloroethane 75-00-3 EPA 624 mg/L
Chloroethane 75-00-3 EPA 8260 mg/L
Chloroform 67-66-3 EPA 624 mg/L
Chloroform 67-66-3 EPA 8260 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0022 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.001 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0115 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.001 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
21 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Chloromethane 74-87-3 EPA 624 mg/L
Chloromethane 74-87-3 EPA 8260 mg/L
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 624 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/L
Dibromochloromethane 124-48-1 EPA 624 mg/L
Dibromochloromethane 124-48-1 EPA 8260 mg/L
Dibromomethane 74-95-3 EPA 8260 mg/L
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/L
Ethylbenzene 100-41-4 EPA 624 mg/L
Ethylbenzene 100-41-4 EPA 8260 mg/L
Hexachlorobutadiene 87-68-3 EPA 8260 mg/L
Isopropyl Ether 108-20-3 EPA 8260 mg/L
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/L
M,P-Xylene 179601-23-1 EPA 8260 mg/L
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/L
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/L
Methylene Chloride 75-09-2 EPA 624 mg/L
Methylene Chloride 75-09-2 EPA 8260 mg/L
N-Butylbenzene 104-51-8 EPA 8260 mg/L
N-Propylbenzene 103-65-1 EPA 8260 mg/L
Naphthalene 91-20-3 EPA 8260 mg/L
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/L
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/L
Sec-Butylbenzene 135-98-8 EPA 8260 mg/L
Styrene 100-42-5 EPA 8260 mg/L
T-Butylbenzene 98-06-6 EPA 8260 mg/L
Tert-Butyl Alcohol 75-65-0 EPA 8260 mg/L
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/L
Tetrachloroethylene 127-18-4 EPA 624 mg/L
Tetrachloroethylene 127-18-4 EPA 8260 mg/L
Toluene 108-88-3 EPA 624 mg/L
Toluene 108-88-3 EPA 8260 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 624 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 624 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/L
Trichloroethylene 79-01-6 EPA 624 mg/L
Trichloroethylene 79-01-6 EPA 8260 mg/L
Trichlorofluoromethane 75-69-4 EPA 624 mg/L
Trichlorofluoromethane 75-69-4 EPA 8260 mg/L
Vinyl Acetate 108-05-4 EPA 8260 mg/L
Vinyl Chloride 75-01-4 EPA 624 mg/L
Vinyl Chloride 75-01-4 EPA 8260 mg/L
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
11:30:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-F010
(Downstream)680-188269
9/1/2020
10:00:00
Yes
Yes
ABL-SW008(+100)
Little Mountain CreekABL-SW008(+100)-
F009(Downstream)680-186392
7/14/2020
--
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391708
7/12/2018
7:10:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
10439554
7/12/2018
ABL-SW008
Little Mountain Creek
ABL-SW008-F006
92403757
10/15/2018
15:15:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F005
92391738
7/12/2018
Yes
Yes
Yes
Yes
0:00:00
Yes
Yes
ABL-SW008
Little Mountain Creek
ABL-SW008-F007
92416092
1/30/2019
14:55:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
10470569
4/10/2019
--
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
22 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB Alkalinity mg/L
Alkalinity, Carbonate (As CaCO3) ALKC Alkalinity mg/L
Alkalinity, Total (As CaCO3) ALK Alkalinity mg/L
Bromide 24959-67-9 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Chloride, Total mg/L
Hardness (As CaCO3) HARD Total Hardness (as CaCO3) by calculation mg/L
pH PH pH SU
Sulfate (As SO4) 14808-79-8 Anions, Ion Chromatography mg/L
Total Hardness TOTHARD EPA 200.7 Rev 4.4 1994 mg/L
Inorganics
Cyanide 57-12-5 D7511-12 mg/L
Cyanide 57-12-5 EPA 9012B mg/L
Cyanide 57-12-5 SM 4500-CN mg/L
Cyanide 57-12-5 Total Cyanide mg/L
Cyanide, Available 57-12-5_AVAIL OIA1677 mg/L
Fluoride 16984-48-8 Anions, Ion Chromatography mg/L
Fluoride 16984-48-8 EPA 300.0 mg/L
Fluoride 16984-48-8 SM 4500 F C mg/L
Metals
Antimony 7440-36-0 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 6010 mg/L
Barium 7440-39-3 EPA 6010 mg/L
Beryllium 7440-41-7 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Calcium 7440-70-2 Metals (ICP) mg/L
Chromium, total 7440-47-3 EPA 200.7 Rev 4.4 1994 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Copper 7440-50-8 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Magnesium 7439-95-4 Metals (ICP) mg/L
Mercury 7439-97-6 EPA 245.1 Rev 3.0 1994 mg/L
Mercury 7439-97-6 EPA 7470 mg/L
Nickel 7440-02-0 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 6010 mg/L
Silver 7440-22-4 EPA 200.7 Rev 4.4 1994 mg/L
Silver 7440-22-4 EPA 6010 mg/L
Thallium 7440-28-0 EPA 200.7 Rev 4.4 1994 mg/L
Zinc 7440-66-6 EPA 200.7 Rev 4.4 1994 mg/L
PAHs
Acenaphthene 83-32-9 EPA 625.1 mg/L
Acenaphthene 83-32-9 EPA 8270 mg/L
Acenaphthene 83-32-9 EPA 8270D by SIM mg/L
Acenaphthylene 208-96-8 EPA 625.1 mg/L
Acenaphthylene 208-96-8 EPA 8270 mg/L
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/L
Anthracene 120-12-7 EPA 625.1 mg/L
Chemical Name CAS-RN Method Units
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
-- -- -- -- -- -- -- --42 -- -- --41 -- -- --42 --
-- -- -- -- -- -- -- --<5 U -- --<5 U -- --<5 U
-- -- -- -- -- -- -- --42 -- -- --41 -- -- --42 --
-- -- -- -- -- -- -- --<0.4 U -- --0.41 J -- --<0.4 U
-- -- -- -- -- -- -- --5.6 -- -- --5.9 -- -- --5.7 --
-- -- -- -- -- -- -- --5.9 -- -- --6.2 -- -- --6.1 --
-- -- -- -- -- -- -- --48 -- -- --47 -- -- --48 --
-- -- -- -- -- -- -- --7.6 -- -- --7.5 -- -- --7.5 --
-- -- -- -- -- -- -- --4.9 -- -- --4.4 -- -- --4.6 --
15.4 --15.4 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.002 U -- --<0.002 U -- --<0.002 U -- --
<0.004 U <0.004 U -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.002 U -- --<0.002 U -- --<0.002 U
-- -- -- -- -- --<0.0015 U -- --<0.0015 U -- --<0.0015 U -- --
-- -- -- -- -- -- -- --<0.08 U -- --<0.08 U -- --<0.08 U
0.067 --0.067 J -- --0.041 J -- --<0.04 U -- --0.04 J -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.005 U <0.005 U -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --11 -- -- --11 -- -- --11 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.0025 U <0.0025 U -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --5 -- -- --5 -- -- --5.1 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- -- -- --
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
23 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Anthracene 120-12-7 EPA 8270 mg/L
Anthracene 120-12-7 EPA 8270D by SIM mg/L
Benzo[a]anthracene 56-55-3 EPA 625.1 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/L
Benzo[a]pyrene 50-32-8 EPA 625.1 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/L
Benzo[b]fluoranthene 205-99-2 EPA 625.1 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 625.1 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/L
Benzo[k]fluoranthene 207-08-9 EPA 625.1 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/L
Chrysene 218-01-9 EPA 625.1 mg/L
Chrysene 218-01-9 EPA 8270 mg/L
Chrysene 218-01-9 EPA 8270D by SIM mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 625.1 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/L
Fluoranthene 206-44-0 EPA 625.1 mg/L
Fluoranthene 206-44-0 EPA 8270 mg/L
Fluoranthene 206-44-0 EPA 8270D by SIM mg/L
Fluorene 86-73-7 EPA 625.1 mg/L
Fluorene 86-73-7 EPA 8270 mg/L
Fluorene 86-73-7 EPA 8270D by SIM mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 625.1 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/L
Naphthalene 91-20-3 EPA 625.1 mg/L
Naphthalene 91-20-3 EPA 8270 mg/L
Naphthalene 91-20-3 EPA 8270D by SIM mg/L
Phenanthrene 85-01-8 EPA 625.1 mg/L
Phenanthrene 85-01-8 EPA 8270 mg/L
Phenanthrene 85-01-8 EPA 8270D by SIM mg/L
Pyrene 129-00-0 EPA 625.1 mg/L
Pyrene 129-00-0 EPA 8270 mg/L
Pyrene 129-00-0 EPA 8270D by SIM mg/L
Total HMW PAHs PAHs_highMW_ND=0 -- mg/L
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/L
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/L
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/L
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 608.3 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 608.3 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0021 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0019 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0014 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0019 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0014 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0021 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00805 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0161 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00565 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0113 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
24 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 608.3 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 608.3 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 608.3 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 608.3 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/L
Total PCBs (Aroclors) totPCB_ND=0 -- mg/L
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/L
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/L
PCB Congeners
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/L
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/L
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/L
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/L
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/L
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/L
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/L
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/L
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/L
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/L
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/L
Dichlorobiphenyl, 3,4- (PCB 12) 2974-92-7 1668A mg/L
PCB 12/13 E52450566 1668A mg/L
Dichlorobiphenyl, 3,4'- (PCB 13) 2974-90-5 1668A mg/L
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/L
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/L
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/L
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/L
Trichlorobiphenyl, 2,2',5- (PCB 18) 37680-65-2 1668A mg/L
PCB 18/30 E52450574 1668A mg/L
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/L
Trichlorobiphenyl, 2,3,3'- (PCB 20) 38444-84-7 1668A mg/L
PCB 20/28 E52450582 1668A mg/L
Trichlorobiphenyl, 2,3,4- (PCB 21) 55702-46-0 1668A mg/L
PCB 21/33 E52450590 1668A mg/L
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/L
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/L
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/L
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/L
Trichlorobiphenyl, 2,3',5- (PCB 26) 38444-81-4 1668A mg/L
PCB 26/29 E52450608 1668A mg/L
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/L
Trichlorobiphenyl, 2,4,4'- (PCB 28) 7012-37-5 1668A mg/L
Trichlorobiphenyl, 2,4,5- (PCB 29) 15862-07-4 1668A mg/L
Trichlorobiphenyl, 2,4,6- (PCB 30) 35693-92-6 1668A mg/L
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/L
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
25 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Trichlorobiphenyl, 2,3',4'- (PCB 33) 38444-86-9 1668A mg/L
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/L
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/L
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/L
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/L
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/L
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,3'- (PCB 40) 38444-93-8 1668A mg/L
PCB 40/41/71 E52450616 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4- (PCB 41) 52663-59-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5- (PCB 43) 70362-46-8 1668A mg/L
PCB 43/73 (43/73) 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5'- (PCB 44) 41464-39-5 1668A mg/L
PCB 44/47/65 E52450624 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6- (PCB 45) 70362-45-7 1668A mg/L
PCB 45/51 E52450632 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,4'- (PCB 47) 2437-79-8 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5'- (PCB 49) 41464-40-8 1668A mg/L
PCB 49/69 E52450640 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6- (PCB 50) 62796-65-0 1668A mg/L
PCB 50/53 E52450657 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6'- (PCB 51) 68194-04-7 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,6'- (PCB 53) 41464-41-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',6- (PCB 59) 74472-33-6 1668A mg/L
PCB 59/62/75 E52450665 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,5- (PCB 61) 33284-53-6 1668A mg/L
PCB 61/70/74/76 E52450673 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,6- (PCB 62) 54230-22-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,5,6- (PCB 65) 33284-54-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,6- (PCB 69) 60233-24-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',5- (PCB 70) 32598-11-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',6- (PCB 71) 41464-46-4 1668A mg/L
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',5- (PCB 74) 32690-93-0 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',6- (PCB 75) 32598-12-2 1668A mg/L
Tetrachlorobiphenyl, 2',3,4,5- (PCB 76) 70362-48-0 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
26 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/L
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,4'- (PCB 85) 65510-45-4 1668A mg/L
PCB 85/117/116 E52450699 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5- (PCB 86) 55312-69-1 1668A mg/L
PCB 86/87/97/108/119/125 E52450707 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5'- (PCB 87) 38380-02-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6- (PCB 88) 55215-17-3 1668A mg/L
PCB 88/91 E52450715 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',5- (PCB 90) 68194-07-0 1668A mg/L
PCB 90/101/113 E52450723 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',6- (PCB 91) 68194-05-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6- (PCB 93) 73575-56-1 1668A mg/L
PCB 93/98/100/102 (93/98/100/102) 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/L
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,5- (PCB 97) 41464-51-1 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,6- (PCB 98) 60233-25-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',6- (PCB 100) 39485-83-1 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,5'- (PCB 101) 37680-73-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,6'- (PCB 102) 68194-06-9 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/L
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',5- (PCB 107) 70424-68-9 1668A mg/L
PCB 107/124 E52450749 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5'- (PCB 108) 70362-41-3 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',6- (PCB 110) 38380-03-9 1668A mg/L
PCB 110/115 E52450756 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5',6- (PCB 113) 68194-10-5 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',6- (PCB 115) 74472-38-1 1668A mg/L
Pentachlorobiphenyl, 2,3,4,5,6- (PCB 116) 18259-05-7 1668A mg/L
Pentachlorobiphenyl, 2,3,4',5,6- (PCB 117) 68194-11-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',6- (PCB 119) 56558-17-9 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/L
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/L
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,5'- (PCB 124) 70424-70-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,6- (PCB 125) 74472-39-2 1668A mg/L
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/L
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
27 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Hexachlorobiphenyl, 2,2',3,3',4,4'- (PCB 128) 38380-07-3 1668A mg/L
PCB 128/166 E52450764 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5- (PCB 129) 55215-18-4 1668A mg/L
PCB 129/138/163 (129/138/163) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6- (PCB 134) 52704-70-8 1668A mg/L
PCB 134/143 E52450780 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6'- (PCB 135) 52744-13-5 1668A mg/L
PCB 135/151 (135/151) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5'- (PCB 138) 35065-28-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6- (PCB 139) 56030-56-9 1668A mg/L
PCB 139/140 E52450806 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6'- (PCB 140) 59291-64-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6'- (PCB 143) 68194-15-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6- (PCB 147) 68194-13-8 1668A mg/L
PCB 147/149 E52450814 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5',6- (PCB 149) 38380-04-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,5',6- (PCB 151) 52663-63-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,5'- (PCB 153) 35065-27-1 1668A mg/L
PCB 153/168 E52450822 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 1668A mg/L
PCB 156/157 E52450830 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,6- (PCB 163) 74472-44-9 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/L
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/L
Hexachlorobiphenyl, 2,3,4,4',5,6- (PCB 166) 41411-63-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5',6- (PCB 168) 59291-65-5 1668A mg/L
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',6- (PCB 171) 52663-71-5 1668A mg/L
PCB 171/173 E52450848 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,6- (PCB 173) 68194-16-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
28 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,5'- (PCB 180) 35065-29-3 1668A mg/L
PCB 180/193 E52450855 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5',6- (PCB 183) 52663-69-1 1668A mg/L
PCB 183/185 E52450863 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,5',6- (PCB 185) 52712-05-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4',5,5',6- (PCB 193) 69782-91-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',6,6'- (PCB 197) 33091-17-7 1668A mg/L
PCB 197/200 E52450871 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,5',6- (PCB 198) 68194-17-2 1668A mg/L
PCB 198/199 E52450889 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4',5,5',6'- (PCB 199) 52663-75-9 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,6,6'- (PCB 200) 52663-73-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/L
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/L
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/L
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/L
Pesticides
Aldrin 309-00-2 EPA 608.3 mg/L
alpha BHC (Alpha Hexachlorocyclohexane) 319-84-6 EPA 608.3 mg/L
Alpha Endosulfan 959-98-8 EPA 608.3 mg/L
beta BHC (Beta Hexachlorocyclohexane) 319-85-7 EPA 608.3 mg/L
Beta Endosulfan 33213-65-9 EPA 608.3 mg/L
Chlordane 57-74-9 EPA 608.3 mg/L
delta BHC (Delta Hexachlorocyclohexane) 319-86-8 EPA 608.3 mg/L
Dieldrin 60-57-1 EPA 608.3 mg/L
Endosulfan sulfate 1031-07-8 EPA 608.3 mg/L
Endrin 72-20-8 EPA 608.3 mg/L
Endrin Aldehyde 7421-93-4 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
29 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
gamma BHC (Lindane) 58-89-9 EPA 608.3 mg/L
Heptachlor 76-44-8 EPA 608.3 mg/L
Heptachlor Epoxide 1024-57-3 EPA 608.3 mg/L
P,P'-DDD 72-54-8 EPA 608.3 mg/L
P,P'-DDE 72-55-9 EPA 608.3 mg/L
P,P'-DDT 50-29-3 EPA 608.3 mg/L
Toxaphene 8001-35-2 EPA 608.3 mg/L
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270 mg/L
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/L
1,2-Dichlorobenzene 95-50-1 EPA 625.1 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/L
1,2-Diphenylhydrazine 122-66-7 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 625.1 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 625.1 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/L
2-Chloronaphthalene 91-58-7 EPA 625.1 mg/L
2-Chloronaphthalene 91-58-7 EPA 8270 mg/L
2-Chlorophenol 95-57-8 EPA 625.1 mg/L
2-Chlorophenol 95-57-8 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 625.1 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/L
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/L
2-Nitroaniline 88-74-4 EPA 8270 mg/L
2-Nitrophenol 88-75-5 EPA 625.1 mg/L
2-Nitrophenol 88-75-5 EPA 8270 mg/L
2,4-Dichlorophenol 120-83-2 EPA 625.1 mg/L
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/L
2,4-Dimethylphenol 105-67-9 EPA 625.1 mg/L
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/L
2,4-Dinitrophenol 51-28-5 EPA 625.1 mg/L
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 625.1 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/L
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 625.1 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 625.1 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/L
3- & 4-Methylphenol edms_0009 EPA 625.1 mg/L
3- & 4-Methylphenol edms_0009 EPA 8270 mg/L
3-Nitroaniline 99-09-2 EPA 8270 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 625.1 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 625.1 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 625.1 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/L
4-Chloroaniline 106-47-8 EPA 8270 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 625.1 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0013 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0023 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --0.003 J -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0012 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0014 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0014 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0014 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0405 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0012 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0014 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.003 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0028 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
4-Nitroaniline 100-01-6 EPA 8270 mg/L
4-Nitrophenol 100-02-7 EPA 625.1 mg/L
4-Nitrophenol 100-02-7 EPA 8270 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 625.1 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/L
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/L
Benzidine 92-87-5 EPA 625.1 mg/L
Benzoic acid 65-85-0 EPA 8270 mg/L
Benzyl Alcohol 100-51-6 EPA 8270 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 625.1 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 625.1 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 625.1 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 625.1 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 625.1 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 625.1 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/L
Di-N-Octylphthalate 117-84-0 EPA 625.1 mg/L
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/L
Dibenzofuran 132-64-9 EPA 8270 mg/L
Diethyl Phthalate 84-66-2 EPA 625.1 mg/L
Diethyl Phthalate 84-66-2 EPA 8270 mg/L
Dimethyl Phthalate 131-11-3 EPA 625.1 mg/L
Dimethyl Phthalate 131-11-3 EPA 8270 mg/L
Hexachlorobenzene 118-74-1 EPA 625.1 mg/L
Hexachlorobenzene 118-74-1 EPA 8270 mg/L
Hexachlorobutadiene 87-68-3 EPA 625.1 mg/L
Hexachlorobutadiene 87-68-3 EPA 8270 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 625.1 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/L
Hexachloroethane 67-72-1 EPA 625.1 mg/L
Hexachloroethane 67-72-1 EPA 8270 mg/L
Isophorone 78-59-1 EPA 625.1 mg/L
Isophorone 78-59-1 EPA 8270 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 625.1 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 625.1 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 625.1 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/L
Nitrobenzene 98-95-3 EPA 625.1 mg/L
Nitrobenzene 98-95-3 EPA 8270 mg/L
Pentachlorophenol 87-86-5 EPA 625.1 mg/L
Pentachlorophenol 87-86-5 EPA 8270 mg/L
Phenol 108-95-2 EPA 420.4 Rev 1.0 1993 mg/L
Phenol 108-95-2 EPA 625.1 mg/L
Phenol 108-95-2 EPA 8270 mg/L
VOCs
1,1-Dichloroethane 75-34-3 EPA 624 mg/L
1,1-Dichloroethane 75-34-3 EPA 8260 mg/L
1,1-Dichloroethene 75-35-4 EPA 624 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0035 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0152 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0027 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0028 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --0.0024 J -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0024 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.002 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.002 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0022 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0012 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0021 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0022 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00091 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
31 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
1,1-Dichloroethene 75-35-4 EPA 8260 mg/L
1,1-Dichloropropene 563-58-6 EPA 8260 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 624 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/L
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 624 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 624 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/L
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/L
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 624 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/L
1,2-Dichloroethane 107-06-2 EPA 624 mg/L
1,2-Dichloroethane 107-06-2 EPA 8260 mg/L
1,2-dichloroethene (cis+trans) 540-59-0 EPA 8260 mg/L
1,2-Dichloropropane 78-87-5 EPA 624 mg/L
1,2-Dichloropropane 78-87-5 EPA 8260 mg/L
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/L
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 624 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/L
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 624 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/L
1,3-Dichloropropane 142-28-9 EPA 8260 mg/L
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 624 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/L
2-Chloroethyl Vinyl Ether 110-75-8 EPA 624 mg/L
2-Chlorotoluene 95-49-8 EPA 8260 mg/L
2-Hexanone 591-78-6 EPA 8260 mg/L
2,2-Dichloropropane 594-20-7 EPA 8260 mg/L
4-Chlorotoluene 106-43-4 EPA 8260 mg/L
Acetone 67-64-1 EPA 8260 mg/L
Acrolein 107-02-8 EPA 624 mg/L
Acrylonitrile 107-13-1 EPA 624 mg/L
Benzene 71-43-2 EPA 624 mg/L
Benzene 71-43-2 EPA 8260 mg/L
Bromobenzene 108-86-1 EPA 8260 mg/L
Bromochloromethane 74-97-5 EPA 8260 mg/L
Bromodichloromethane 75-27-4 EPA 624 mg/L
Bromodichloromethane 75-27-4 EPA 8260 mg/L
Bromoform 75-25-2 EPA 624 mg/L
Bromoform 75-25-2 EPA 8260 mg/L
Bromomethane 74-83-9 EPA 624 mg/L
Bromomethane 74-83-9 EPA 8260 mg/L
Carbon Tetrachloride 56-23-5 EPA 624 mg/L
Carbon Tetrachloride 56-23-5 EPA 8260 mg/L
Chlorobenzene 108-90-7 EPA 624 mg/L
Chlorobenzene 108-90-7 EPA 8260 mg/L
Chloroethane 75-00-3 EPA 624 mg/L
Chloroethane 75-00-3 EPA 8260 mg/L
Chloroform 67-66-3 EPA 624 mg/L
Chloroform 67-66-3 EPA 8260 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
32 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Chloromethane 74-87-3 EPA 624 mg/L
Chloromethane 74-87-3 EPA 8260 mg/L
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 624 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/L
Dibromochloromethane 124-48-1 EPA 624 mg/L
Dibromochloromethane 124-48-1 EPA 8260 mg/L
Dibromomethane 74-95-3 EPA 8260 mg/L
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/L
Ethylbenzene 100-41-4 EPA 624 mg/L
Ethylbenzene 100-41-4 EPA 8260 mg/L
Hexachlorobutadiene 87-68-3 EPA 8260 mg/L
Isopropyl Ether 108-20-3 EPA 8260 mg/L
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/L
M,P-Xylene 179601-23-1 EPA 8260 mg/L
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/L
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/L
Methylene Chloride 75-09-2 EPA 624 mg/L
Methylene Chloride 75-09-2 EPA 8260 mg/L
N-Butylbenzene 104-51-8 EPA 8260 mg/L
N-Propylbenzene 103-65-1 EPA 8260 mg/L
Naphthalene 91-20-3 EPA 8260 mg/L
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/L
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/L
Sec-Butylbenzene 135-98-8 EPA 8260 mg/L
Styrene 100-42-5 EPA 8260 mg/L
T-Butylbenzene 98-06-6 EPA 8260 mg/L
Tert-Butyl Alcohol 75-65-0 EPA 8260 mg/L
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/L
Tetrachloroethylene 127-18-4 EPA 624 mg/L
Tetrachloroethylene 127-18-4 EPA 8260 mg/L
Toluene 108-88-3 EPA 624 mg/L
Toluene 108-88-3 EPA 8260 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 624 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 624 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/L
Trichloroethylene 79-01-6 EPA 624 mg/L
Trichloroethylene 79-01-6 EPA 8260 mg/L
Trichlorofluoromethane 75-69-4 EPA 624 mg/L
Trichlorofluoromethane 75-69-4 EPA 8260 mg/L
Vinyl Acetate 108-05-4 EPA 8260 mg/L
Vinyl Chloride 75-01-4 EPA 624 mg/L
Vinyl Chloride 75-01-4 EPA 8260 mg/L
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW008-F008
92424938
4/10/2019
0:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424938
4/10/2019
10:50:00
ABL-SW008
Little Mountain Creek
10:50:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F009
680-186392
7/14/2020
11:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F008
92424944
4/10/2019
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F009
(Upstream)680-186392
7/14/2020
10:00:00
ABL-SW008
Little Mountain Creek
ABL-SW008-F010
680-188269
9/1/2020
1:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F009
(Downstream)680-186392
7/14/2020
10:30:00
ABL-SW009(-50)
Little Mountain CreekABL-SW009(-50)-F010
(Upstream)680-188269
9/1/2020
11:00:00
ABL-SW009(+50)
Little Mountain CreekABL-SW009(+50)-F010
(Downstream)680-188269
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
33 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB Alkalinity mg/L
Alkalinity, Carbonate (As CaCO3) ALKC Alkalinity mg/L
Alkalinity, Total (As CaCO3) ALK Alkalinity mg/L
Bromide 24959-67-9 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Chloride, Total mg/L
Hardness (As CaCO3) HARD Total Hardness (as CaCO3) by calculation mg/L
pH PH pH SU
Sulfate (As SO4) 14808-79-8 Anions, Ion Chromatography mg/L
Total Hardness TOTHARD EPA 200.7 Rev 4.4 1994 mg/L
Inorganics
Cyanide 57-12-5 D7511-12 mg/L
Cyanide 57-12-5 EPA 9012B mg/L
Cyanide 57-12-5 SM 4500-CN mg/L
Cyanide 57-12-5 Total Cyanide mg/L
Cyanide, Available 57-12-5_AVAIL OIA1677 mg/L
Fluoride 16984-48-8 Anions, Ion Chromatography mg/L
Fluoride 16984-48-8 EPA 300.0 mg/L
Fluoride 16984-48-8 SM 4500 F C mg/L
Metals
Antimony 7440-36-0 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 6010 mg/L
Barium 7440-39-3 EPA 6010 mg/L
Beryllium 7440-41-7 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Calcium 7440-70-2 Metals (ICP) mg/L
Chromium, total 7440-47-3 EPA 200.7 Rev 4.4 1994 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Copper 7440-50-8 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Magnesium 7439-95-4 Metals (ICP) mg/L
Mercury 7439-97-6 EPA 245.1 Rev 3.0 1994 mg/L
Mercury 7439-97-6 EPA 7470 mg/L
Nickel 7440-02-0 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 6010 mg/L
Silver 7440-22-4 EPA 200.7 Rev 4.4 1994 mg/L
Silver 7440-22-4 EPA 6010 mg/L
Thallium 7440-28-0 EPA 200.7 Rev 4.4 1994 mg/L
Zinc 7440-66-6 EPA 200.7 Rev 4.4 1994 mg/L
PAHs
Acenaphthene 83-32-9 EPA 625.1 mg/L
Acenaphthene 83-32-9 EPA 8270 mg/L
Acenaphthene 83-32-9 EPA 8270D by SIM mg/L
Acenaphthylene 208-96-8 EPA 625.1 mg/L
Acenaphthylene 208-96-8 EPA 8270 mg/L
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/L
Anthracene 120-12-7 EPA 625.1 mg/L
Chemical Name CAS-RN Method Units
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --36.6 --20.3 --21.3 --16.2 --16.2 --21.5 -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.004 U <0.004 U <0.004 U 0.004 --0.004 J <0.004 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.078 J <0.05 U 0.051 J 0.075 --0.075 J <0.05 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
34 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Anthracene 120-12-7 EPA 8270 mg/L
Anthracene 120-12-7 EPA 8270D by SIM mg/L
Benzo[a]anthracene 56-55-3 EPA 625.1 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/L
Benzo[a]pyrene 50-32-8 EPA 625.1 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/L
Benzo[b]fluoranthene 205-99-2 EPA 625.1 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 625.1 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/L
Benzo[k]fluoranthene 207-08-9 EPA 625.1 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/L
Chrysene 218-01-9 EPA 625.1 mg/L
Chrysene 218-01-9 EPA 8270 mg/L
Chrysene 218-01-9 EPA 8270D by SIM mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 625.1 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/L
Fluoranthene 206-44-0 EPA 625.1 mg/L
Fluoranthene 206-44-0 EPA 8270 mg/L
Fluoranthene 206-44-0 EPA 8270D by SIM mg/L
Fluorene 86-73-7 EPA 625.1 mg/L
Fluorene 86-73-7 EPA 8270 mg/L
Fluorene 86-73-7 EPA 8270D by SIM mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 625.1 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/L
Naphthalene 91-20-3 EPA 625.1 mg/L
Naphthalene 91-20-3 EPA 8270 mg/L
Naphthalene 91-20-3 EPA 8270D by SIM mg/L
Phenanthrene 85-01-8 EPA 625.1 mg/L
Phenanthrene 85-01-8 EPA 8270 mg/L
Phenanthrene 85-01-8 EPA 8270D by SIM mg/L
Pyrene 129-00-0 EPA 625.1 mg/L
Pyrene 129-00-0 EPA 8270 mg/L
Pyrene 129-00-0 EPA 8270D by SIM mg/L
Total HMW PAHs PAHs_highMW_ND=0 -- mg/L
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/L
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/L
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/L
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 608.3 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 608.3 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00042 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00042 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
35 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 608.3 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 608.3 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 608.3 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 608.3 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/L
Total PCBs (Aroclors) totPCB_ND=0 -- mg/L
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/L
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/L
PCB Congeners
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/L
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/L
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/L
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/L
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/L
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/L
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/L
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/L
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/L
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/L
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/L
Dichlorobiphenyl, 3,4- (PCB 12) 2974-92-7 1668A mg/L
PCB 12/13 E52450566 1668A mg/L
Dichlorobiphenyl, 3,4'- (PCB 13) 2974-90-5 1668A mg/L
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/L
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/L
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/L
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/L
Trichlorobiphenyl, 2,2',5- (PCB 18) 37680-65-2 1668A mg/L
PCB 18/30 E52450574 1668A mg/L
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/L
Trichlorobiphenyl, 2,3,3'- (PCB 20) 38444-84-7 1668A mg/L
PCB 20/28 E52450582 1668A mg/L
Trichlorobiphenyl, 2,3,4- (PCB 21) 55702-46-0 1668A mg/L
PCB 21/33 E52450590 1668A mg/L
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/L
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/L
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/L
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/L
Trichlorobiphenyl, 2,3',5- (PCB 26) 38444-81-4 1668A mg/L
PCB 26/29 E52450608 1668A mg/L
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/L
Trichlorobiphenyl, 2,4,4'- (PCB 28) 7012-37-5 1668A mg/L
Trichlorobiphenyl, 2,4,5- (PCB 29) 15862-07-4 1668A mg/L
Trichlorobiphenyl, 2,4,6- (PCB 30) 35693-92-6 1668A mg/L
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/L
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00042 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00042 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00042 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00042 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00042 U -- -- -- -- -- -- -- -- -- -- -- --
-- --<0 U -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00147 U -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00294 U -- -- -- -- -- -- -- -- -- -- -- --
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.00000248 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000254 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000334 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000342 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000131 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000134 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000137 U -- -- -- -- -- -- -- -- -- -- -- --<0.0000014 U
<0.000000962 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000983 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000132 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000135 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
36 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Trichlorobiphenyl, 2,3',4'- (PCB 33) 38444-86-9 1668A mg/L
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/L
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/L
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/L
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/L
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/L
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,3'- (PCB 40) 38444-93-8 1668A mg/L
PCB 40/41/71 E52450616 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4- (PCB 41) 52663-59-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5- (PCB 43) 70362-46-8 1668A mg/L
PCB 43/73 (43/73) 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5'- (PCB 44) 41464-39-5 1668A mg/L
PCB 44/47/65 E52450624 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6- (PCB 45) 70362-45-7 1668A mg/L
PCB 45/51 E52450632 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,4'- (PCB 47) 2437-79-8 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5'- (PCB 49) 41464-40-8 1668A mg/L
PCB 49/69 E52450640 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6- (PCB 50) 62796-65-0 1668A mg/L
PCB 50/53 E52450657 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6'- (PCB 51) 68194-04-7 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,6'- (PCB 53) 41464-41-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',6- (PCB 59) 74472-33-6 1668A mg/L
PCB 59/62/75 E52450665 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,5- (PCB 61) 33284-53-6 1668A mg/L
PCB 61/70/74/76 E52450673 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,6- (PCB 62) 54230-22-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,5,6- (PCB 65) 33284-54-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,6- (PCB 69) 60233-24-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',5- (PCB 70) 32598-11-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',6- (PCB 71) 41464-46-4 1668A mg/L
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',5- (PCB 74) 32690-93-0 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',6- (PCB 75) 32598-12-2 1668A mg/L
Tetrachlorobiphenyl, 2',3,4,5- (PCB 76) 70362-48-0 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000537 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000549 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
<0.000000253 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000259 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000152 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000155 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000152 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000155 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000156 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000159 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000152 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000155 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000203 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000207 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000851 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000869 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
37 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/L
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,4'- (PCB 85) 65510-45-4 1668A mg/L
PCB 85/117/116 E52450699 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5- (PCB 86) 55312-69-1 1668A mg/L
PCB 86/87/97/108/119/125 E52450707 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5'- (PCB 87) 38380-02-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6- (PCB 88) 55215-17-3 1668A mg/L
PCB 88/91 E52450715 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',5- (PCB 90) 68194-07-0 1668A mg/L
PCB 90/101/113 E52450723 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',6- (PCB 91) 68194-05-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6- (PCB 93) 73575-56-1 1668A mg/L
PCB 93/98/100/102 (93/98/100/102) 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/L
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,5- (PCB 97) 41464-51-1 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,6- (PCB 98) 60233-25-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',6- (PCB 100) 39485-83-1 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,5'- (PCB 101) 37680-73-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,6'- (PCB 102) 68194-06-9 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/L
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',5- (PCB 107) 70424-68-9 1668A mg/L
PCB 107/124 E52450749 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5'- (PCB 108) 70362-41-3 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',6- (PCB 110) 38380-03-9 1668A mg/L
PCB 110/115 E52450756 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5',6- (PCB 113) 68194-10-5 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',6- (PCB 115) 74472-38-1 1668A mg/L
Pentachlorobiphenyl, 2,3,4,5,6- (PCB 116) 18259-05-7 1668A mg/L
Pentachlorobiphenyl, 2,3,4',5,6- (PCB 117) 68194-11-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',6- (PCB 119) 56558-17-9 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/L
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/L
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,5'- (PCB 124) 70424-70-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,6- (PCB 125) 74472-39-2 1668A mg/L
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/L
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000152 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000155 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000304 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000311 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000152 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000155 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000203 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000207 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000962 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000983 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000648 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000662 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
38 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Hexachlorobiphenyl, 2,2',3,3',4,4'- (PCB 128) 38380-07-3 1668A mg/L
PCB 128/166 E52450764 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5- (PCB 129) 55215-18-4 1668A mg/L
PCB 129/138/163 (129/138/163) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6- (PCB 134) 52704-70-8 1668A mg/L
PCB 134/143 E52450780 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6'- (PCB 135) 52744-13-5 1668A mg/L
PCB 135/151 (135/151) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5'- (PCB 138) 35065-28-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6- (PCB 139) 56030-56-9 1668A mg/L
PCB 139/140 E52450806 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6'- (PCB 140) 59291-64-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6'- (PCB 143) 68194-15-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6- (PCB 147) 68194-13-8 1668A mg/L
PCB 147/149 E52450814 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5',6- (PCB 149) 38380-04-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,5',6- (PCB 151) 52663-63-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,5'- (PCB 153) 35065-27-1 1668A mg/L
PCB 153/168 E52450822 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 1668A mg/L
PCB 156/157 E52450830 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,6- (PCB 163) 74472-44-9 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/L
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/L
Hexachlorobiphenyl, 2,3,4,4',5,6- (PCB 166) 41411-63-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5',6- (PCB 168) 59291-65-5 1668A mg/L
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',6- (PCB 171) 52663-71-5 1668A mg/L
PCB 171/173 E52450848 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,6- (PCB 173) 68194-16-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000152 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000155 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
39 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,5'- (PCB 180) 35065-29-3 1668A mg/L
PCB 180/193 E52450855 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5',6- (PCB 183) 52663-69-1 1668A mg/L
PCB 183/185 E52450863 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,5',6- (PCB 185) 52712-05-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4',5,5',6- (PCB 193) 69782-91-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',6,6'- (PCB 197) 33091-17-7 1668A mg/L
PCB 197/200 E52450871 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,5',6- (PCB 198) 68194-17-2 1668A mg/L
PCB 198/199 E52450889 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4',5,5',6'- (PCB 199) 52663-75-9 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,6,6'- (PCB 200) 52663-73-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/L
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/L
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/L
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/L
Pesticides
Aldrin 309-00-2 EPA 608.3 mg/L
alpha BHC (Alpha Hexachlorocyclohexane) 319-84-6 EPA 608.3 mg/L
Alpha Endosulfan 959-98-8 EPA 608.3 mg/L
beta BHC (Beta Hexachlorocyclohexane) 319-85-7 EPA 608.3 mg/L
Beta Endosulfan 33213-65-9 EPA 608.3 mg/L
Chlordane 57-74-9 EPA 608.3 mg/L
delta BHC (Delta Hexachlorocyclohexane) 319-86-8 EPA 608.3 mg/L
Dieldrin 60-57-1 EPA 608.3 mg/L
Endosulfan sulfate 1031-07-8 EPA 608.3 mg/L
Endrin 72-20-8 EPA 608.3 mg/L
Endrin Aldehyde 7421-93-4 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000101 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000104 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
<0.000000506 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000518 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000152 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000155 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000152 U -- -- -- -- -- -- -- -- -- -- -- --<0.00000155 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0.00000076 U -- -- -- -- -- -- -- -- -- -- -- --<0.000000776 U
<0 U -- -- -- -- -- -- -- -- -- -- -- --<0 U
<0.00005399 U -- -- -- -- -- -- -- -- -- -- -- --<0.000055264 U
<0.00010798 U -- -- -- -- -- -- -- -- -- -- -- --<0.000110528 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
gamma BHC (Lindane) 58-89-9 EPA 608.3 mg/L
Heptachlor 76-44-8 EPA 608.3 mg/L
Heptachlor Epoxide 1024-57-3 EPA 608.3 mg/L
P,P'-DDD 72-54-8 EPA 608.3 mg/L
P,P'-DDE 72-55-9 EPA 608.3 mg/L
P,P'-DDT 50-29-3 EPA 608.3 mg/L
Toxaphene 8001-35-2 EPA 608.3 mg/L
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270 mg/L
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/L
1,2-Dichlorobenzene 95-50-1 EPA 625.1 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/L
1,2-Diphenylhydrazine 122-66-7 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 625.1 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 625.1 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/L
2-Chloronaphthalene 91-58-7 EPA 625.1 mg/L
2-Chloronaphthalene 91-58-7 EPA 8270 mg/L
2-Chlorophenol 95-57-8 EPA 625.1 mg/L
2-Chlorophenol 95-57-8 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 625.1 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/L
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/L
2-Nitroaniline 88-74-4 EPA 8270 mg/L
2-Nitrophenol 88-75-5 EPA 625.1 mg/L
2-Nitrophenol 88-75-5 EPA 8270 mg/L
2,4-Dichlorophenol 120-83-2 EPA 625.1 mg/L
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/L
2,4-Dimethylphenol 105-67-9 EPA 625.1 mg/L
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/L
2,4-Dinitrophenol 51-28-5 EPA 625.1 mg/L
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 625.1 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/L
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 625.1 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 625.1 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/L
3- & 4-Methylphenol edms_0009 EPA 625.1 mg/L
3- & 4-Methylphenol edms_0009 EPA 8270 mg/L
3-Nitroaniline 99-09-2 EPA 8270 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 625.1 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 625.1 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 625.1 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/L
4-Chloroaniline 106-47-8 EPA 8270 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 625.1 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
41 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
4-Nitroaniline 100-01-6 EPA 8270 mg/L
4-Nitrophenol 100-02-7 EPA 625.1 mg/L
4-Nitrophenol 100-02-7 EPA 8270 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 625.1 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/L
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/L
Benzidine 92-87-5 EPA 625.1 mg/L
Benzoic acid 65-85-0 EPA 8270 mg/L
Benzyl Alcohol 100-51-6 EPA 8270 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 625.1 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 625.1 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 625.1 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 625.1 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 625.1 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 625.1 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/L
Di-N-Octylphthalate 117-84-0 EPA 625.1 mg/L
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/L
Dibenzofuran 132-64-9 EPA 8270 mg/L
Diethyl Phthalate 84-66-2 EPA 625.1 mg/L
Diethyl Phthalate 84-66-2 EPA 8270 mg/L
Dimethyl Phthalate 131-11-3 EPA 625.1 mg/L
Dimethyl Phthalate 131-11-3 EPA 8270 mg/L
Hexachlorobenzene 118-74-1 EPA 625.1 mg/L
Hexachlorobenzene 118-74-1 EPA 8270 mg/L
Hexachlorobutadiene 87-68-3 EPA 625.1 mg/L
Hexachlorobutadiene 87-68-3 EPA 8270 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 625.1 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/L
Hexachloroethane 67-72-1 EPA 625.1 mg/L
Hexachloroethane 67-72-1 EPA 8270 mg/L
Isophorone 78-59-1 EPA 625.1 mg/L
Isophorone 78-59-1 EPA 8270 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 625.1 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 625.1 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 625.1 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/L
Nitrobenzene 98-95-3 EPA 625.1 mg/L
Nitrobenzene 98-95-3 EPA 8270 mg/L
Pentachlorophenol 87-86-5 EPA 625.1 mg/L
Pentachlorophenol 87-86-5 EPA 8270 mg/L
Phenol 108-95-2 EPA 420.4 Rev 1.0 1993 mg/L
Phenol 108-95-2 EPA 625.1 mg/L
Phenol 108-95-2 EPA 8270 mg/L
VOCs
1,1-Dichloroethane 75-34-3 EPA 624 mg/L
1,1-Dichloroethane 75-34-3 EPA 8260 mg/L
1,1-Dichloroethene 75-35-4 EPA 624 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
42 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
1,1-Dichloroethene 75-35-4 EPA 8260 mg/L
1,1-Dichloropropene 563-58-6 EPA 8260 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 624 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/L
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 624 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 624 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/L
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/L
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 624 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/L
1,2-Dichloroethane 107-06-2 EPA 624 mg/L
1,2-Dichloroethane 107-06-2 EPA 8260 mg/L
1,2-dichloroethene (cis+trans) 540-59-0 EPA 8260 mg/L
1,2-Dichloropropane 78-87-5 EPA 624 mg/L
1,2-Dichloropropane 78-87-5 EPA 8260 mg/L
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/L
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 624 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/L
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 624 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/L
1,3-Dichloropropane 142-28-9 EPA 8260 mg/L
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 624 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/L
2-Chloroethyl Vinyl Ether 110-75-8 EPA 624 mg/L
2-Chlorotoluene 95-49-8 EPA 8260 mg/L
2-Hexanone 591-78-6 EPA 8260 mg/L
2,2-Dichloropropane 594-20-7 EPA 8260 mg/L
4-Chlorotoluene 106-43-4 EPA 8260 mg/L
Acetone 67-64-1 EPA 8260 mg/L
Acrolein 107-02-8 EPA 624 mg/L
Acrylonitrile 107-13-1 EPA 624 mg/L
Benzene 71-43-2 EPA 624 mg/L
Benzene 71-43-2 EPA 8260 mg/L
Bromobenzene 108-86-1 EPA 8260 mg/L
Bromochloromethane 74-97-5 EPA 8260 mg/L
Bromodichloromethane 75-27-4 EPA 624 mg/L
Bromodichloromethane 75-27-4 EPA 8260 mg/L
Bromoform 75-25-2 EPA 624 mg/L
Bromoform 75-25-2 EPA 8260 mg/L
Bromomethane 74-83-9 EPA 624 mg/L
Bromomethane 74-83-9 EPA 8260 mg/L
Carbon Tetrachloride 56-23-5 EPA 624 mg/L
Carbon Tetrachloride 56-23-5 EPA 8260 mg/L
Chlorobenzene 108-90-7 EPA 624 mg/L
Chlorobenzene 108-90-7 EPA 8260 mg/L
Chloroethane 75-00-3 EPA 624 mg/L
Chloroethane 75-00-3 EPA 8260 mg/L
Chloroform 67-66-3 EPA 624 mg/L
Chloroform 67-66-3 EPA 8260 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
43 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Chloromethane 74-87-3 EPA 624 mg/L
Chloromethane 74-87-3 EPA 8260 mg/L
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 624 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/L
Dibromochloromethane 124-48-1 EPA 624 mg/L
Dibromochloromethane 124-48-1 EPA 8260 mg/L
Dibromomethane 74-95-3 EPA 8260 mg/L
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/L
Ethylbenzene 100-41-4 EPA 624 mg/L
Ethylbenzene 100-41-4 EPA 8260 mg/L
Hexachlorobutadiene 87-68-3 EPA 8260 mg/L
Isopropyl Ether 108-20-3 EPA 8260 mg/L
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/L
M,P-Xylene 179601-23-1 EPA 8260 mg/L
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/L
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/L
Methylene Chloride 75-09-2 EPA 624 mg/L
Methylene Chloride 75-09-2 EPA 8260 mg/L
N-Butylbenzene 104-51-8 EPA 8260 mg/L
N-Propylbenzene 103-65-1 EPA 8260 mg/L
Naphthalene 91-20-3 EPA 8260 mg/L
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/L
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/L
Sec-Butylbenzene 135-98-8 EPA 8260 mg/L
Styrene 100-42-5 EPA 8260 mg/L
T-Butylbenzene 98-06-6 EPA 8260 mg/L
Tert-Butyl Alcohol 75-65-0 EPA 8260 mg/L
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/L
Tetrachloroethylene 127-18-4 EPA 624 mg/L
Tetrachloroethylene 127-18-4 EPA 8260 mg/L
Toluene 108-88-3 EPA 624 mg/L
Toluene 108-88-3 EPA 8260 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 624 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 624 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/L
Trichloroethylene 79-01-6 EPA 624 mg/L
Trichloroethylene 79-01-6 EPA 8260 mg/L
Trichlorofluoromethane 75-69-4 EPA 624 mg/L
Trichlorofluoromethane 75-69-4 EPA 8260 mg/L
Vinyl Acetate 108-05-4 EPA 8260 mg/L
Vinyl Chloride 75-01-4 EPA 624 mg/L
Vinyl Chloride 75-01-4 EPA 8260 mg/L
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
10439554
7/12/2018
-- 0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F006
92403757
10/15/2018
11:45:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F005
92391738
7/12/2018
14:15:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
0:00:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F007
92416092
1/30/2019
12:10:00
ABL-SW010
Little Mountain Creek
ABL-SW0010-F007
92416092
1/30/2019
14:20:00
ABL-SW009
Little Mountain Creek
ABL-SW009-F008
92424938
4/10/2019
--
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
10439554
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
44 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB Alkalinity mg/L
Alkalinity, Carbonate (As CaCO3) ALKC Alkalinity mg/L
Alkalinity, Total (As CaCO3) ALK Alkalinity mg/L
Bromide 24959-67-9 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Chloride, Total mg/L
Hardness (As CaCO3) HARD Total Hardness (as CaCO3) by calculation mg/L
pH PH pH SU
Sulfate (As SO4) 14808-79-8 Anions, Ion Chromatography mg/L
Total Hardness TOTHARD EPA 200.7 Rev 4.4 1994 mg/L
Inorganics
Cyanide 57-12-5 D7511-12 mg/L
Cyanide 57-12-5 EPA 9012B mg/L
Cyanide 57-12-5 SM 4500-CN mg/L
Cyanide 57-12-5 Total Cyanide mg/L
Cyanide, Available 57-12-5_AVAIL OIA1677 mg/L
Fluoride 16984-48-8 Anions, Ion Chromatography mg/L
Fluoride 16984-48-8 EPA 300.0 mg/L
Fluoride 16984-48-8 SM 4500 F C mg/L
Metals
Antimony 7440-36-0 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 6010 mg/L
Barium 7440-39-3 EPA 6010 mg/L
Beryllium 7440-41-7 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Calcium 7440-70-2 Metals (ICP) mg/L
Chromium, total 7440-47-3 EPA 200.7 Rev 4.4 1994 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Copper 7440-50-8 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Magnesium 7439-95-4 Metals (ICP) mg/L
Mercury 7439-97-6 EPA 245.1 Rev 3.0 1994 mg/L
Mercury 7439-97-6 EPA 7470 mg/L
Nickel 7440-02-0 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 6010 mg/L
Silver 7440-22-4 EPA 200.7 Rev 4.4 1994 mg/L
Silver 7440-22-4 EPA 6010 mg/L
Thallium 7440-28-0 EPA 200.7 Rev 4.4 1994 mg/L
Zinc 7440-66-6 EPA 200.7 Rev 4.4 1994 mg/L
PAHs
Acenaphthene 83-32-9 EPA 625.1 mg/L
Acenaphthene 83-32-9 EPA 8270 mg/L
Acenaphthene 83-32-9 EPA 8270D by SIM mg/L
Acenaphthylene 208-96-8 EPA 625.1 mg/L
Acenaphthylene 208-96-8 EPA 8270 mg/L
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/L
Anthracene 120-12-7 EPA 625.1 mg/L
Chemical Name CAS-RN Method Units
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
36 --20.9 --16.2 --16.2 --21.7 -- -- --37.3 --20.2 --15.5 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.004 U <0.004 U <0.004 U <0.004 U <0.004 U -- --<0.004 U <0.004 U <0.004 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
0.074 J <0.05 U 0.065 --0.065 J <0.05 U -- --0.078 J <0.05 U 0.061 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.005 U <0.005 U <0.005 U <0.005 U <0.005 U -- --<0.005 U <0.005 U <0.005 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U -- --<0.0025 U <0.0025 U <0.0025 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
45 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Anthracene 120-12-7 EPA 8270 mg/L
Anthracene 120-12-7 EPA 8270D by SIM mg/L
Benzo[a]anthracene 56-55-3 EPA 625.1 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/L
Benzo[a]pyrene 50-32-8 EPA 625.1 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/L
Benzo[b]fluoranthene 205-99-2 EPA 625.1 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 625.1 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/L
Benzo[k]fluoranthene 207-08-9 EPA 625.1 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/L
Chrysene 218-01-9 EPA 625.1 mg/L
Chrysene 218-01-9 EPA 8270 mg/L
Chrysene 218-01-9 EPA 8270D by SIM mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 625.1 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/L
Fluoranthene 206-44-0 EPA 625.1 mg/L
Fluoranthene 206-44-0 EPA 8270 mg/L
Fluoranthene 206-44-0 EPA 8270D by SIM mg/L
Fluorene 86-73-7 EPA 625.1 mg/L
Fluorene 86-73-7 EPA 8270 mg/L
Fluorene 86-73-7 EPA 8270D by SIM mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 625.1 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/L
Naphthalene 91-20-3 EPA 625.1 mg/L
Naphthalene 91-20-3 EPA 8270 mg/L
Naphthalene 91-20-3 EPA 8270D by SIM mg/L
Phenanthrene 85-01-8 EPA 625.1 mg/L
Phenanthrene 85-01-8 EPA 8270 mg/L
Phenanthrene 85-01-8 EPA 8270D by SIM mg/L
Pyrene 129-00-0 EPA 625.1 mg/L
Pyrene 129-00-0 EPA 8270 mg/L
Pyrene 129-00-0 EPA 8270D by SIM mg/L
Total HMW PAHs PAHs_highMW_ND=0 -- mg/L
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/L
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/L
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/L
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 608.3 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 608.3 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00042 U -- -- -- -- -- -- -- -- -- --<0.00042 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00042 U -- -- -- -- -- -- -- -- -- --<0.00042 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
46 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 608.3 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 608.3 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 608.3 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 608.3 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/L
Total PCBs (Aroclors) totPCB_ND=0 -- mg/L
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/L
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/L
PCB Congeners
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/L
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/L
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/L
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/L
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/L
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/L
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/L
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/L
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/L
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/L
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/L
Dichlorobiphenyl, 3,4- (PCB 12) 2974-92-7 1668A mg/L
PCB 12/13 E52450566 1668A mg/L
Dichlorobiphenyl, 3,4'- (PCB 13) 2974-90-5 1668A mg/L
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/L
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/L
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/L
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/L
Trichlorobiphenyl, 2,2',5- (PCB 18) 37680-65-2 1668A mg/L
PCB 18/30 E52450574 1668A mg/L
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/L
Trichlorobiphenyl, 2,3,3'- (PCB 20) 38444-84-7 1668A mg/L
PCB 20/28 E52450582 1668A mg/L
Trichlorobiphenyl, 2,3,4- (PCB 21) 55702-46-0 1668A mg/L
PCB 21/33 E52450590 1668A mg/L
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/L
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/L
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/L
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/L
Trichlorobiphenyl, 2,3',5- (PCB 26) 38444-81-4 1668A mg/L
PCB 26/29 E52450608 1668A mg/L
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/L
Trichlorobiphenyl, 2,4,4'- (PCB 28) 7012-37-5 1668A mg/L
Trichlorobiphenyl, 2,4,5- (PCB 29) 15862-07-4 1668A mg/L
Trichlorobiphenyl, 2,4,6- (PCB 30) 35693-92-6 1668A mg/L
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/L
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00042 U -- -- -- -- -- -- -- -- -- --<0.00042 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00042 U -- -- -- -- -- -- -- -- -- --<0.00042 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00042 U -- -- -- -- -- -- -- -- -- --<0.00042 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00042 U -- -- -- -- -- -- -- -- -- --<0.00042 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.00042 U -- -- -- -- -- -- -- -- -- --<0.00042 U -- -- -- --
<0 U -- -- -- -- -- -- -- -- -- --<0 U -- -- -- --
<0.00147 U -- -- -- -- -- -- -- -- -- --<0.00147 U -- -- -- --
<0.00294 U -- -- -- -- -- -- -- -- -- --<0.00294 U -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000275 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000371 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000145 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000152 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000107 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000146 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
47 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Trichlorobiphenyl, 2,3',4'- (PCB 33) 38444-86-9 1668A mg/L
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/L
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/L
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/L
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/L
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/L
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,3'- (PCB 40) 38444-93-8 1668A mg/L
PCB 40/41/71 E52450616 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4- (PCB 41) 52663-59-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5- (PCB 43) 70362-46-8 1668A mg/L
PCB 43/73 (43/73) 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5'- (PCB 44) 41464-39-5 1668A mg/L
PCB 44/47/65 E52450624 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6- (PCB 45) 70362-45-7 1668A mg/L
PCB 45/51 E52450632 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,4'- (PCB 47) 2437-79-8 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5'- (PCB 49) 41464-40-8 1668A mg/L
PCB 49/69 E52450640 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6- (PCB 50) 62796-65-0 1668A mg/L
PCB 50/53 E52450657 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6'- (PCB 51) 68194-04-7 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,6'- (PCB 53) 41464-41-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',6- (PCB 59) 74472-33-6 1668A mg/L
PCB 59/62/75 E52450665 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,5- (PCB 61) 33284-53-6 1668A mg/L
PCB 61/70/74/76 E52450673 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,6- (PCB 62) 54230-22-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,5,6- (PCB 65) 33284-54-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,6- (PCB 69) 60233-24-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',5- (PCB 70) 32598-11-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',6- (PCB 71) 41464-46-4 1668A mg/L
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',5- (PCB 74) 32690-93-0 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',6- (PCB 75) 32598-12-2 1668A mg/L
Tetrachlorobiphenyl, 2',3,4,5- (PCB 76) 70362-48-0 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000595 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000281 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000169 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000169 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000173 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000169 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000225 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000944 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
48 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/L
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,4'- (PCB 85) 65510-45-4 1668A mg/L
PCB 85/117/116 E52450699 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5- (PCB 86) 55312-69-1 1668A mg/L
PCB 86/87/97/108/119/125 E52450707 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5'- (PCB 87) 38380-02-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6- (PCB 88) 55215-17-3 1668A mg/L
PCB 88/91 E52450715 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',5- (PCB 90) 68194-07-0 1668A mg/L
PCB 90/101/113 E52450723 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',6- (PCB 91) 68194-05-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6- (PCB 93) 73575-56-1 1668A mg/L
PCB 93/98/100/102 (93/98/100/102) 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/L
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,5- (PCB 97) 41464-51-1 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,6- (PCB 98) 60233-25-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',6- (PCB 100) 39485-83-1 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,5'- (PCB 101) 37680-73-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,6'- (PCB 102) 68194-06-9 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/L
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',5- (PCB 107) 70424-68-9 1668A mg/L
PCB 107/124 E52450749 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5'- (PCB 108) 70362-41-3 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',6- (PCB 110) 38380-03-9 1668A mg/L
PCB 110/115 E52450756 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5',6- (PCB 113) 68194-10-5 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',6- (PCB 115) 74472-38-1 1668A mg/L
Pentachlorobiphenyl, 2,3,4,5,6- (PCB 116) 18259-05-7 1668A mg/L
Pentachlorobiphenyl, 2,3,4',5,6- (PCB 117) 68194-11-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',6- (PCB 119) 56558-17-9 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/L
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/L
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,5'- (PCB 124) 70424-70-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,6- (PCB 125) 74472-39-2 1668A mg/L
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/L
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000169 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000337 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000169 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000225 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000107 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000719 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
49 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Hexachlorobiphenyl, 2,2',3,3',4,4'- (PCB 128) 38380-07-3 1668A mg/L
PCB 128/166 E52450764 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5- (PCB 129) 55215-18-4 1668A mg/L
PCB 129/138/163 (129/138/163) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6- (PCB 134) 52704-70-8 1668A mg/L
PCB 134/143 E52450780 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6'- (PCB 135) 52744-13-5 1668A mg/L
PCB 135/151 (135/151) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5'- (PCB 138) 35065-28-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6- (PCB 139) 56030-56-9 1668A mg/L
PCB 139/140 E52450806 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6'- (PCB 140) 59291-64-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6'- (PCB 143) 68194-15-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6- (PCB 147) 68194-13-8 1668A mg/L
PCB 147/149 E52450814 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5',6- (PCB 149) 38380-04-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,5',6- (PCB 151) 52663-63-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,5'- (PCB 153) 35065-27-1 1668A mg/L
PCB 153/168 E52450822 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 1668A mg/L
PCB 156/157 E52450830 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,6- (PCB 163) 74472-44-9 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/L
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/L
Hexachlorobiphenyl, 2,3,4,4',5,6- (PCB 166) 41411-63-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5',6- (PCB 168) 59291-65-5 1668A mg/L
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',6- (PCB 171) 52663-71-5 1668A mg/L
PCB 171/173 E52450848 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,6- (PCB 173) 68194-16-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000169 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,5'- (PCB 180) 35065-29-3 1668A mg/L
PCB 180/193 E52450855 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5',6- (PCB 183) 52663-69-1 1668A mg/L
PCB 183/185 E52450863 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,5',6- (PCB 185) 52712-05-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4',5,5',6- (PCB 193) 69782-91-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',6,6'- (PCB 197) 33091-17-7 1668A mg/L
PCB 197/200 E52450871 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,5',6- (PCB 198) 68194-17-2 1668A mg/L
PCB 198/199 E52450889 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4',5,5',6'- (PCB 199) 52663-75-9 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,6,6'- (PCB 200) 52663-73-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/L
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/L
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/L
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/L
Pesticides
Aldrin 309-00-2 EPA 608.3 mg/L
alpha BHC (Alpha Hexachlorocyclohexane) 319-84-6 EPA 608.3 mg/L
Alpha Endosulfan 959-98-8 EPA 608.3 mg/L
beta BHC (Beta Hexachlorocyclohexane) 319-85-7 EPA 608.3 mg/L
Beta Endosulfan 33213-65-9 EPA 608.3 mg/L
Chlordane 57-74-9 EPA 608.3 mg/L
delta BHC (Delta Hexachlorocyclohexane) 319-86-8 EPA 608.3 mg/L
Dieldrin 60-57-1 EPA 608.3 mg/L
Endosulfan sulfate 1031-07-8 EPA 608.3 mg/L
Endrin 72-20-8 EPA 608.3 mg/L
Endrin Aldehyde 7421-93-4 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000112 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000562 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000169 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00000169 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000000843 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.0000599335 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000119867 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
51 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
gamma BHC (Lindane) 58-89-9 EPA 608.3 mg/L
Heptachlor 76-44-8 EPA 608.3 mg/L
Heptachlor Epoxide 1024-57-3 EPA 608.3 mg/L
P,P'-DDD 72-54-8 EPA 608.3 mg/L
P,P'-DDE 72-55-9 EPA 608.3 mg/L
P,P'-DDT 50-29-3 EPA 608.3 mg/L
Toxaphene 8001-35-2 EPA 608.3 mg/L
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270 mg/L
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/L
1,2-Dichlorobenzene 95-50-1 EPA 625.1 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/L
1,2-Diphenylhydrazine 122-66-7 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 625.1 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 625.1 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/L
2-Chloronaphthalene 91-58-7 EPA 625.1 mg/L
2-Chloronaphthalene 91-58-7 EPA 8270 mg/L
2-Chlorophenol 95-57-8 EPA 625.1 mg/L
2-Chlorophenol 95-57-8 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 625.1 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/L
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/L
2-Nitroaniline 88-74-4 EPA 8270 mg/L
2-Nitrophenol 88-75-5 EPA 625.1 mg/L
2-Nitrophenol 88-75-5 EPA 8270 mg/L
2,4-Dichlorophenol 120-83-2 EPA 625.1 mg/L
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/L
2,4-Dimethylphenol 105-67-9 EPA 625.1 mg/L
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/L
2,4-Dinitrophenol 51-28-5 EPA 625.1 mg/L
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 625.1 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/L
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 625.1 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 625.1 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/L
3- & 4-Methylphenol edms_0009 EPA 625.1 mg/L
3- & 4-Methylphenol edms_0009 EPA 8270 mg/L
3-Nitroaniline 99-09-2 EPA 8270 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 625.1 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 625.1 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 625.1 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/L
4-Chloroaniline 106-47-8 EPA 8270 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 625.1 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
52 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
4-Nitroaniline 100-01-6 EPA 8270 mg/L
4-Nitrophenol 100-02-7 EPA 625.1 mg/L
4-Nitrophenol 100-02-7 EPA 8270 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 625.1 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/L
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/L
Benzidine 92-87-5 EPA 625.1 mg/L
Benzoic acid 65-85-0 EPA 8270 mg/L
Benzyl Alcohol 100-51-6 EPA 8270 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 625.1 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 625.1 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 625.1 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 625.1 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 625.1 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 625.1 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/L
Di-N-Octylphthalate 117-84-0 EPA 625.1 mg/L
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/L
Dibenzofuran 132-64-9 EPA 8270 mg/L
Diethyl Phthalate 84-66-2 EPA 625.1 mg/L
Diethyl Phthalate 84-66-2 EPA 8270 mg/L
Dimethyl Phthalate 131-11-3 EPA 625.1 mg/L
Dimethyl Phthalate 131-11-3 EPA 8270 mg/L
Hexachlorobenzene 118-74-1 EPA 625.1 mg/L
Hexachlorobenzene 118-74-1 EPA 8270 mg/L
Hexachlorobutadiene 87-68-3 EPA 625.1 mg/L
Hexachlorobutadiene 87-68-3 EPA 8270 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 625.1 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/L
Hexachloroethane 67-72-1 EPA 625.1 mg/L
Hexachloroethane 67-72-1 EPA 8270 mg/L
Isophorone 78-59-1 EPA 625.1 mg/L
Isophorone 78-59-1 EPA 8270 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 625.1 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 625.1 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 625.1 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/L
Nitrobenzene 98-95-3 EPA 625.1 mg/L
Nitrobenzene 98-95-3 EPA 8270 mg/L
Pentachlorophenol 87-86-5 EPA 625.1 mg/L
Pentachlorophenol 87-86-5 EPA 8270 mg/L
Phenol 108-95-2 EPA 420.4 Rev 1.0 1993 mg/L
Phenol 108-95-2 EPA 625.1 mg/L
Phenol 108-95-2 EPA 8270 mg/L
VOCs
1,1-Dichloroethane 75-34-3 EPA 624 mg/L
1,1-Dichloroethane 75-34-3 EPA 8260 mg/L
1,1-Dichloroethene 75-35-4 EPA 624 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
53 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
1,1-Dichloroethene 75-35-4 EPA 8260 mg/L
1,1-Dichloropropene 563-58-6 EPA 8260 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 624 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/L
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 624 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 624 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/L
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/L
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 624 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/L
1,2-Dichloroethane 107-06-2 EPA 624 mg/L
1,2-Dichloroethane 107-06-2 EPA 8260 mg/L
1,2-dichloroethene (cis+trans) 540-59-0 EPA 8260 mg/L
1,2-Dichloropropane 78-87-5 EPA 624 mg/L
1,2-Dichloropropane 78-87-5 EPA 8260 mg/L
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/L
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 624 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/L
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 624 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/L
1,3-Dichloropropane 142-28-9 EPA 8260 mg/L
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 624 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/L
2-Chloroethyl Vinyl Ether 110-75-8 EPA 624 mg/L
2-Chlorotoluene 95-49-8 EPA 8260 mg/L
2-Hexanone 591-78-6 EPA 8260 mg/L
2,2-Dichloropropane 594-20-7 EPA 8260 mg/L
4-Chlorotoluene 106-43-4 EPA 8260 mg/L
Acetone 67-64-1 EPA 8260 mg/L
Acrolein 107-02-8 EPA 624 mg/L
Acrylonitrile 107-13-1 EPA 624 mg/L
Benzene 71-43-2 EPA 624 mg/L
Benzene 71-43-2 EPA 8260 mg/L
Bromobenzene 108-86-1 EPA 8260 mg/L
Bromochloromethane 74-97-5 EPA 8260 mg/L
Bromodichloromethane 75-27-4 EPA 624 mg/L
Bromodichloromethane 75-27-4 EPA 8260 mg/L
Bromoform 75-25-2 EPA 624 mg/L
Bromoform 75-25-2 EPA 8260 mg/L
Bromomethane 74-83-9 EPA 624 mg/L
Bromomethane 74-83-9 EPA 8260 mg/L
Carbon Tetrachloride 56-23-5 EPA 624 mg/L
Carbon Tetrachloride 56-23-5 EPA 8260 mg/L
Chlorobenzene 108-90-7 EPA 624 mg/L
Chlorobenzene 108-90-7 EPA 8260 mg/L
Chloroethane 75-00-3 EPA 624 mg/L
Chloroethane 75-00-3 EPA 8260 mg/L
Chloroform 67-66-3 EPA 624 mg/L
Chloroform 67-66-3 EPA 8260 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
54 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Chloromethane 74-87-3 EPA 624 mg/L
Chloromethane 74-87-3 EPA 8260 mg/L
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 624 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/L
Dibromochloromethane 124-48-1 EPA 624 mg/L
Dibromochloromethane 124-48-1 EPA 8260 mg/L
Dibromomethane 74-95-3 EPA 8260 mg/L
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/L
Ethylbenzene 100-41-4 EPA 624 mg/L
Ethylbenzene 100-41-4 EPA 8260 mg/L
Hexachlorobutadiene 87-68-3 EPA 8260 mg/L
Isopropyl Ether 108-20-3 EPA 8260 mg/L
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/L
M,P-Xylene 179601-23-1 EPA 8260 mg/L
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/L
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/L
Methylene Chloride 75-09-2 EPA 624 mg/L
Methylene Chloride 75-09-2 EPA 8260 mg/L
N-Butylbenzene 104-51-8 EPA 8260 mg/L
N-Propylbenzene 103-65-1 EPA 8260 mg/L
Naphthalene 91-20-3 EPA 8260 mg/L
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/L
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/L
Sec-Butylbenzene 135-98-8 EPA 8260 mg/L
Styrene 100-42-5 EPA 8260 mg/L
T-Butylbenzene 98-06-6 EPA 8260 mg/L
Tert-Butyl Alcohol 75-65-0 EPA 8260 mg/L
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/L
Tetrachloroethylene 127-18-4 EPA 624 mg/L
Tetrachloroethylene 127-18-4 EPA 8260 mg/L
Toluene 108-88-3 EPA 624 mg/L
Toluene 108-88-3 EPA 8260 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 624 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 624 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/L
Trichloroethylene 79-01-6 EPA 624 mg/L
Trichloroethylene 79-01-6 EPA 8260 mg/L
Trichlorofluoromethane 75-69-4 EPA 624 mg/L
Trichlorofluoromethane 75-69-4 EPA 8260 mg/L
Vinyl Acetate 108-05-4 EPA 8260 mg/L
Vinyl Chloride 75-01-4 EPA 624 mg/L
Vinyl Chloride 75-01-4 EPA 8260 mg/L
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW010
Little Mountain Creek
ABL-SW010-F005
92391738
7/12/2018
0:00:00 11:55:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
0:00:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F006
92403757
10/15/2018
12:20:00
ABL-SW011
Little Mountain Creek
ABL-SW0011-F007
92416092
1/30/2019
14:25:00
ABL-SW010
Little Mountain Creek
ABL-SW010-F008
92424938
4/10/2019
--
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
92391738
7/12/2018
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F005
10439554
7/12/2018
12:05:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
0:00:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F006
92403757
10/15/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
55 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB Alkalinity mg/L
Alkalinity, Carbonate (As CaCO3) ALKC Alkalinity mg/L
Alkalinity, Total (As CaCO3) ALK Alkalinity mg/L
Bromide 24959-67-9 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Chloride, Total mg/L
Hardness (As CaCO3) HARD Total Hardness (as CaCO3) by calculation mg/L
pH PH pH SU
Sulfate (As SO4) 14808-79-8 Anions, Ion Chromatography mg/L
Total Hardness TOTHARD EPA 200.7 Rev 4.4 1994 mg/L
Inorganics
Cyanide 57-12-5 D7511-12 mg/L
Cyanide 57-12-5 EPA 9012B mg/L
Cyanide 57-12-5 SM 4500-CN mg/L
Cyanide 57-12-5 Total Cyanide mg/L
Cyanide, Available 57-12-5_AVAIL OIA1677 mg/L
Fluoride 16984-48-8 Anions, Ion Chromatography mg/L
Fluoride 16984-48-8 EPA 300.0 mg/L
Fluoride 16984-48-8 SM 4500 F C mg/L
Metals
Antimony 7440-36-0 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 6010 mg/L
Barium 7440-39-3 EPA 6010 mg/L
Beryllium 7440-41-7 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Calcium 7440-70-2 Metals (ICP) mg/L
Chromium, total 7440-47-3 EPA 200.7 Rev 4.4 1994 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Copper 7440-50-8 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Magnesium 7439-95-4 Metals (ICP) mg/L
Mercury 7439-97-6 EPA 245.1 Rev 3.0 1994 mg/L
Mercury 7439-97-6 EPA 7470 mg/L
Nickel 7440-02-0 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 6010 mg/L
Silver 7440-22-4 EPA 200.7 Rev 4.4 1994 mg/L
Silver 7440-22-4 EPA 6010 mg/L
Thallium 7440-28-0 EPA 200.7 Rev 4.4 1994 mg/L
Zinc 7440-66-6 EPA 200.7 Rev 4.4 1994 mg/L
PAHs
Acenaphthene 83-32-9 EPA 625.1 mg/L
Acenaphthene 83-32-9 EPA 8270 mg/L
Acenaphthene 83-32-9 EPA 8270D by SIM mg/L
Acenaphthylene 208-96-8 EPA 625.1 mg/L
Acenaphthylene 208-96-8 EPA 8270 mg/L
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/L
Anthracene 120-12-7 EPA 625.1 mg/L
Chemical Name CAS-RN Method Units
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
15.5 --22.6 -- -- -- -- --39.2 --21.3 --16 --16 -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.002 U
<0.004 U <0.004 U -- -- -- --<0.004 U <0.004 U <0.004 U <0.004 U -- --
-- -- -- -- -- --<0.004 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0015 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
0.061 J <0.05 U -- -- -- --0.082 J <0.05 U 0.061 --0.061 J <0.2 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0039 U -- -- -- -- -- -- -- -- -- --
<0.005 U <0.005 U -- --<0.005 U <0.005 U <0.005 U <0.005 U <0.005 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- -- -- --
<0.0025 U <0.0025 U -- --<0.0025 U <0.0025 U <0.0025 U <0.0025 U <0.0025 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00007 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00024 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0002 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00013 U -- -- -- -- -- -- -- -- -- --
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
56 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Anthracene 120-12-7 EPA 8270 mg/L
Anthracene 120-12-7 EPA 8270D by SIM mg/L
Benzo[a]anthracene 56-55-3 EPA 625.1 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/L
Benzo[a]pyrene 50-32-8 EPA 625.1 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/L
Benzo[b]fluoranthene 205-99-2 EPA 625.1 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 625.1 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/L
Benzo[k]fluoranthene 207-08-9 EPA 625.1 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/L
Chrysene 218-01-9 EPA 625.1 mg/L
Chrysene 218-01-9 EPA 8270 mg/L
Chrysene 218-01-9 EPA 8270D by SIM mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 625.1 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/L
Fluoranthene 206-44-0 EPA 625.1 mg/L
Fluoranthene 206-44-0 EPA 8270 mg/L
Fluoranthene 206-44-0 EPA 8270D by SIM mg/L
Fluorene 86-73-7 EPA 625.1 mg/L
Fluorene 86-73-7 EPA 8270 mg/L
Fluorene 86-73-7 EPA 8270D by SIM mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 625.1 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/L
Naphthalene 91-20-3 EPA 625.1 mg/L
Naphthalene 91-20-3 EPA 8270 mg/L
Naphthalene 91-20-3 EPA 8270D by SIM mg/L
Phenanthrene 85-01-8 EPA 625.1 mg/L
Phenanthrene 85-01-8 EPA 8270 mg/L
Phenanthrene 85-01-8 EPA 8270D by SIM mg/L
Pyrene 129-00-0 EPA 625.1 mg/L
Pyrene 129-00-0 EPA 8270 mg/L
Pyrene 129-00-0 EPA 8270D by SIM mg/L
Total HMW PAHs PAHs_highMW_ND=0 -- mg/L
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/L
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/L
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/L
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 608.3 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 608.3 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00032 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00029 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00027 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00037 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00041 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0002 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00053 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0002 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0002 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00028 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0011 J -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00021 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00018 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.001425 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00285 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0011 -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.00169 -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.00228 -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
57 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 608.3 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 608.3 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 608.3 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 608.3 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/L
Total PCBs (Aroclors) totPCB_ND=0 -- mg/L
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/L
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/L
PCB Congeners
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/L
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/L
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/L
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/L
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/L
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/L
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/L
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/L
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/L
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/L
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/L
Dichlorobiphenyl, 3,4- (PCB 12) 2974-92-7 1668A mg/L
PCB 12/13 E52450566 1668A mg/L
Dichlorobiphenyl, 3,4'- (PCB 13) 2974-90-5 1668A mg/L
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/L
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/L
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/L
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/L
Trichlorobiphenyl, 2,2',5- (PCB 18) 37680-65-2 1668A mg/L
PCB 18/30 E52450574 1668A mg/L
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/L
Trichlorobiphenyl, 2,3,3'- (PCB 20) 38444-84-7 1668A mg/L
PCB 20/28 E52450582 1668A mg/L
Trichlorobiphenyl, 2,3,4- (PCB 21) 55702-46-0 1668A mg/L
PCB 21/33 E52450590 1668A mg/L
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/L
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/L
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/L
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/L
Trichlorobiphenyl, 2,3',5- (PCB 26) 38444-81-4 1668A mg/L
PCB 26/29 E52450608 1668A mg/L
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/L
Trichlorobiphenyl, 2,4,4'- (PCB 28) 7012-37-5 1668A mg/L
Trichlorobiphenyl, 2,4,5- (PCB 29) 15862-07-4 1668A mg/L
Trichlorobiphenyl, 2,4,6- (PCB 30) 35693-92-6 1668A mg/L
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/L
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --<0.00042 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0 U <0 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00175 U <0.00147 U -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0035 U <0.00294 U -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000252 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000034 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000133 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000139 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000978 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000134 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
58 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Trichlorobiphenyl, 2,3',4'- (PCB 33) 38444-86-9 1668A mg/L
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/L
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/L
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/L
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/L
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/L
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,3'- (PCB 40) 38444-93-8 1668A mg/L
PCB 40/41/71 E52450616 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4- (PCB 41) 52663-59-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5- (PCB 43) 70362-46-8 1668A mg/L
PCB 43/73 (43/73) 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5'- (PCB 44) 41464-39-5 1668A mg/L
PCB 44/47/65 E52450624 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6- (PCB 45) 70362-45-7 1668A mg/L
PCB 45/51 E52450632 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,4'- (PCB 47) 2437-79-8 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5'- (PCB 49) 41464-40-8 1668A mg/L
PCB 49/69 E52450640 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6- (PCB 50) 62796-65-0 1668A mg/L
PCB 50/53 E52450657 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6'- (PCB 51) 68194-04-7 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,6'- (PCB 53) 41464-41-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',6- (PCB 59) 74472-33-6 1668A mg/L
PCB 59/62/75 E52450665 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,5- (PCB 61) 33284-53-6 1668A mg/L
PCB 61/70/74/76 E52450673 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,6- (PCB 62) 54230-22-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,5,6- (PCB 65) 33284-54-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,6- (PCB 69) 60233-24-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',5- (PCB 70) 32598-11-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',6- (PCB 71) 41464-46-4 1668A mg/L
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',5- (PCB 74) 32690-93-0 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',6- (PCB 75) 32598-12-2 1668A mg/L
Tetrachlorobiphenyl, 2',3,4,5- (PCB 76) 70362-48-0 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000545 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000257 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000154 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000154 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000158 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000154 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000206 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000864 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
59 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/L
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,4'- (PCB 85) 65510-45-4 1668A mg/L
PCB 85/117/116 E52450699 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5- (PCB 86) 55312-69-1 1668A mg/L
PCB 86/87/97/108/119/125 E52450707 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5'- (PCB 87) 38380-02-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6- (PCB 88) 55215-17-3 1668A mg/L
PCB 88/91 E52450715 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',5- (PCB 90) 68194-07-0 1668A mg/L
PCB 90/101/113 E52450723 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',6- (PCB 91) 68194-05-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6- (PCB 93) 73575-56-1 1668A mg/L
PCB 93/98/100/102 (93/98/100/102) 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/L
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,5- (PCB 97) 41464-51-1 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,6- (PCB 98) 60233-25-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',6- (PCB 100) 39485-83-1 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,5'- (PCB 101) 37680-73-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,6'- (PCB 102) 68194-06-9 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/L
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',5- (PCB 107) 70424-68-9 1668A mg/L
PCB 107/124 E52450749 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5'- (PCB 108) 70362-41-3 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',6- (PCB 110) 38380-03-9 1668A mg/L
PCB 110/115 E52450756 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5',6- (PCB 113) 68194-10-5 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',6- (PCB 115) 74472-38-1 1668A mg/L
Pentachlorobiphenyl, 2,3,4,5,6- (PCB 116) 18259-05-7 1668A mg/L
Pentachlorobiphenyl, 2,3,4',5,6- (PCB 117) 68194-11-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',6- (PCB 119) 56558-17-9 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/L
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/L
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,5'- (PCB 124) 70424-70-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,6- (PCB 125) 74472-39-2 1668A mg/L
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/L
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000154 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000309 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000154 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000206 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000978 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000659 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
60 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Hexachlorobiphenyl, 2,2',3,3',4,4'- (PCB 128) 38380-07-3 1668A mg/L
PCB 128/166 E52450764 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5- (PCB 129) 55215-18-4 1668A mg/L
PCB 129/138/163 (129/138/163) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6- (PCB 134) 52704-70-8 1668A mg/L
PCB 134/143 E52450780 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6'- (PCB 135) 52744-13-5 1668A mg/L
PCB 135/151 (135/151) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5'- (PCB 138) 35065-28-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6- (PCB 139) 56030-56-9 1668A mg/L
PCB 139/140 E52450806 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6'- (PCB 140) 59291-64-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6'- (PCB 143) 68194-15-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6- (PCB 147) 68194-13-8 1668A mg/L
PCB 147/149 E52450814 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5',6- (PCB 149) 38380-04-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,5',6- (PCB 151) 52663-63-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,5'- (PCB 153) 35065-27-1 1668A mg/L
PCB 153/168 E52450822 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 1668A mg/L
PCB 156/157 E52450830 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,6- (PCB 163) 74472-44-9 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/L
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/L
Hexachlorobiphenyl, 2,3,4,4',5,6- (PCB 166) 41411-63-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5',6- (PCB 168) 59291-65-5 1668A mg/L
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',6- (PCB 171) 52663-71-5 1668A mg/L
PCB 171/173 E52450848 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,6- (PCB 173) 68194-16-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000154 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
61 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,5'- (PCB 180) 35065-29-3 1668A mg/L
PCB 180/193 E52450855 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5',6- (PCB 183) 52663-69-1 1668A mg/L
PCB 183/185 E52450863 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,5',6- (PCB 185) 52712-05-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4',5,5',6- (PCB 193) 69782-91-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',6,6'- (PCB 197) 33091-17-7 1668A mg/L
PCB 197/200 E52450871 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,5',6- (PCB 198) 68194-17-2 1668A mg/L
PCB 198/199 E52450889 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4',5,5',6'- (PCB 199) 52663-75-9 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,6,6'- (PCB 200) 52663-73-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/L
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/L
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/L
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/L
Pesticides
Aldrin 309-00-2 EPA 608.3 mg/L
alpha BHC (Alpha Hexachlorocyclohexane) 319-84-6 EPA 608.3 mg/L
Alpha Endosulfan 959-98-8 EPA 608.3 mg/L
beta BHC (Beta Hexachlorocyclohexane) 319-85-7 EPA 608.3 mg/L
Beta Endosulfan 33213-65-9 EPA 608.3 mg/L
Chlordane 57-74-9 EPA 608.3 mg/L
delta BHC (Delta Hexachlorocyclohexane) 319-86-8 EPA 608.3 mg/L
Dieldrin 60-57-1 EPA 608.3 mg/L
Endosulfan sulfate 1031-07-8 EPA 608.3 mg/L
Endrin 72-20-8 EPA 608.3 mg/L
Endrin Aldehyde 7421-93-4 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000103 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000515 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000154 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00000154 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000000772 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0000549005 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.000109801 U -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
62 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
gamma BHC (Lindane) 58-89-9 EPA 608.3 mg/L
Heptachlor 76-44-8 EPA 608.3 mg/L
Heptachlor Epoxide 1024-57-3 EPA 608.3 mg/L
P,P'-DDD 72-54-8 EPA 608.3 mg/L
P,P'-DDE 72-55-9 EPA 608.3 mg/L
P,P'-DDT 50-29-3 EPA 608.3 mg/L
Toxaphene 8001-35-2 EPA 608.3 mg/L
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270 mg/L
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/L
1,2-Dichlorobenzene 95-50-1 EPA 625.1 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/L
1,2-Diphenylhydrazine 122-66-7 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 625.1 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 625.1 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/L
2-Chloronaphthalene 91-58-7 EPA 625.1 mg/L
2-Chloronaphthalene 91-58-7 EPA 8270 mg/L
2-Chlorophenol 95-57-8 EPA 625.1 mg/L
2-Chlorophenol 95-57-8 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 625.1 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/L
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/L
2-Nitroaniline 88-74-4 EPA 8270 mg/L
2-Nitrophenol 88-75-5 EPA 625.1 mg/L
2-Nitrophenol 88-75-5 EPA 8270 mg/L
2,4-Dichlorophenol 120-83-2 EPA 625.1 mg/L
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/L
2,4-Dimethylphenol 105-67-9 EPA 625.1 mg/L
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/L
2,4-Dinitrophenol 51-28-5 EPA 625.1 mg/L
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 625.1 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/L
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 625.1 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 625.1 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/L
3- & 4-Methylphenol edms_0009 EPA 625.1 mg/L
3- & 4-Methylphenol edms_0009 EPA 8270 mg/L
3-Nitroaniline 99-09-2 EPA 8270 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 625.1 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 625.1 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 625.1 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/L
4-Chloroaniline 106-47-8 EPA 8270 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 625.1 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0005 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00087 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00094 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0012 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00027 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00088 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0012 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0087 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00087 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0012 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00094 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.002 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00079 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0036 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00084 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
63 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
4-Nitroaniline 100-01-6 EPA 8270 mg/L
4-Nitrophenol 100-02-7 EPA 625.1 mg/L
4-Nitrophenol 100-02-7 EPA 8270 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 625.1 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/L
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/L
Benzidine 92-87-5 EPA 625.1 mg/L
Benzoic acid 65-85-0 EPA 8270 mg/L
Benzyl Alcohol 100-51-6 EPA 8270 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 625.1 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 625.1 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 625.1 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 625.1 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 625.1 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 625.1 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/L
Di-N-Octylphthalate 117-84-0 EPA 625.1 mg/L
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/L
Dibenzofuran 132-64-9 EPA 8270 mg/L
Diethyl Phthalate 84-66-2 EPA 625.1 mg/L
Diethyl Phthalate 84-66-2 EPA 8270 mg/L
Dimethyl Phthalate 131-11-3 EPA 625.1 mg/L
Dimethyl Phthalate 131-11-3 EPA 8270 mg/L
Hexachlorobenzene 118-74-1 EPA 625.1 mg/L
Hexachlorobenzene 118-74-1 EPA 8270 mg/L
Hexachlorobutadiene 87-68-3 EPA 625.1 mg/L
Hexachlorobutadiene 87-68-3 EPA 8270 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 625.1 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/L
Hexachloroethane 67-72-1 EPA 625.1 mg/L
Hexachloroethane 67-72-1 EPA 8270 mg/L
Isophorone 78-59-1 EPA 625.1 mg/L
Isophorone 78-59-1 EPA 8270 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 625.1 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 625.1 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 625.1 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/L
Nitrobenzene 98-95-3 EPA 625.1 mg/L
Nitrobenzene 98-95-3 EPA 8270 mg/L
Pentachlorophenol 87-86-5 EPA 625.1 mg/L
Pentachlorophenol 87-86-5 EPA 8270 mg/L
Phenol 108-95-2 EPA 420.4 Rev 1.0 1993 mg/L
Phenol 108-95-2 EPA 625.1 mg/L
Phenol 108-95-2 EPA 8270 mg/L
VOCs
1,1-Dichloroethane 75-34-3 EPA 624 mg/L
1,1-Dichloroethane 75-34-3 EPA 8260 mg/L
1,1-Dichloroethene 75-35-4 EPA 624 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0039 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0025 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0049 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00076 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00088 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00096 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00091 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00076 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00072 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00063 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00056 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00073 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00069 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0009 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00085 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0011 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00086 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00095 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00088 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.00096 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0011 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0044 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.0064 J -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- -- -- --
64 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
1,1-Dichloroethene 75-35-4 EPA 8260 mg/L
1,1-Dichloropropene 563-58-6 EPA 8260 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 624 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/L
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 624 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 624 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/L
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/L
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 624 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/L
1,2-Dichloroethane 107-06-2 EPA 624 mg/L
1,2-Dichloroethane 107-06-2 EPA 8260 mg/L
1,2-dichloroethene (cis+trans) 540-59-0 EPA 8260 mg/L
1,2-Dichloropropane 78-87-5 EPA 624 mg/L
1,2-Dichloropropane 78-87-5 EPA 8260 mg/L
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/L
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 624 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/L
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 624 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/L
1,3-Dichloropropane 142-28-9 EPA 8260 mg/L
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 624 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/L
2-Chloroethyl Vinyl Ether 110-75-8 EPA 624 mg/L
2-Chlorotoluene 95-49-8 EPA 8260 mg/L
2-Hexanone 591-78-6 EPA 8260 mg/L
2,2-Dichloropropane 594-20-7 EPA 8260 mg/L
4-Chlorotoluene 106-43-4 EPA 8260 mg/L
Acetone 67-64-1 EPA 8260 mg/L
Acrolein 107-02-8 EPA 624 mg/L
Acrylonitrile 107-13-1 EPA 624 mg/L
Benzene 71-43-2 EPA 624 mg/L
Benzene 71-43-2 EPA 8260 mg/L
Bromobenzene 108-86-1 EPA 8260 mg/L
Bromochloromethane 74-97-5 EPA 8260 mg/L
Bromodichloromethane 75-27-4 EPA 624 mg/L
Bromodichloromethane 75-27-4 EPA 8260 mg/L
Bromoform 75-25-2 EPA 624 mg/L
Bromoform 75-25-2 EPA 8260 mg/L
Bromomethane 74-83-9 EPA 624 mg/L
Bromomethane 74-83-9 EPA 8260 mg/L
Carbon Tetrachloride 56-23-5 EPA 624 mg/L
Carbon Tetrachloride 56-23-5 EPA 8260 mg/L
Chlorobenzene 108-90-7 EPA 624 mg/L
Chlorobenzene 108-90-7 EPA 8260 mg/L
Chloroethane 75-00-3 EPA 624 mg/L
Chloroethane 75-00-3 EPA 8260 mg/L
Chloroform 67-66-3 EPA 624 mg/L
Chloroform 67-66-3 EPA 8260 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0022 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.001 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0115 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.001 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
65 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Chloromethane 74-87-3 EPA 624 mg/L
Chloromethane 74-87-3 EPA 8260 mg/L
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 624 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/L
Dibromochloromethane 124-48-1 EPA 624 mg/L
Dibromochloromethane 124-48-1 EPA 8260 mg/L
Dibromomethane 74-95-3 EPA 8260 mg/L
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/L
Ethylbenzene 100-41-4 EPA 624 mg/L
Ethylbenzene 100-41-4 EPA 8260 mg/L
Hexachlorobutadiene 87-68-3 EPA 8260 mg/L
Isopropyl Ether 108-20-3 EPA 8260 mg/L
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/L
M,P-Xylene 179601-23-1 EPA 8260 mg/L
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/L
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/L
Methylene Chloride 75-09-2 EPA 624 mg/L
Methylene Chloride 75-09-2 EPA 8260 mg/L
N-Butylbenzene 104-51-8 EPA 8260 mg/L
N-Propylbenzene 103-65-1 EPA 8260 mg/L
Naphthalene 91-20-3 EPA 8260 mg/L
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/L
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/L
Sec-Butylbenzene 135-98-8 EPA 8260 mg/L
Styrene 100-42-5 EPA 8260 mg/L
T-Butylbenzene 98-06-6 EPA 8260 mg/L
Tert-Butyl Alcohol 75-65-0 EPA 8260 mg/L
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/L
Tetrachloroethylene 127-18-4 EPA 624 mg/L
Tetrachloroethylene 127-18-4 EPA 8260 mg/L
Toluene 108-88-3 EPA 624 mg/L
Toluene 108-88-3 EPA 8260 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 624 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 624 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/L
Trichloroethylene 79-01-6 EPA 624 mg/L
Trichloroethylene 79-01-6 EPA 8260 mg/L
Trichlorofluoromethane 75-69-4 EPA 624 mg/L
Trichlorofluoromethane 75-69-4 EPA 8260 mg/L
Vinyl Acetate 108-05-4 EPA 8260 mg/L
Vinyl Chloride 75-01-4 EPA 624 mg/L
Vinyl Chloride 75-01-4 EPA 8260 mg/L
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW0012-F007
92416092
1/30/2019
14:30:00
ABL-SW011
Little Mountain Creek
ABL-SW011-F008
92424938
4/10/2019
--
ABL-SW012Upgradient Little Mountain
CreekABL-SW012-F005
92391708
7/12/2018
9:55:00
ABL-SW012
Upgradient Little Mountain Creek
ABL-SW012-F005
10439554
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F006
92403757
10/15/2018
12:15:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F005
92391738
7/12/2018
0:00:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
12:45:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F008
92424938
4/10/2019
9:30:00
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F009
680-186392
7/14/2020
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0019 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0016 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0018 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0017 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --<0.0015 U -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
66 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB Alkalinity mg/L
Alkalinity, Carbonate (As CaCO3) ALKC Alkalinity mg/L
Alkalinity, Total (As CaCO3) ALK Alkalinity mg/L
Bromide 24959-67-9 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Chloride, Total mg/L
Hardness (As CaCO3) HARD Total Hardness (as CaCO3) by calculation mg/L
pH PH pH SU
Sulfate (As SO4) 14808-79-8 Anions, Ion Chromatography mg/L
Total Hardness TOTHARD EPA 200.7 Rev 4.4 1994 mg/L
Inorganics
Cyanide 57-12-5 D7511-12 mg/L
Cyanide 57-12-5 EPA 9012B mg/L
Cyanide 57-12-5 SM 4500-CN mg/L
Cyanide 57-12-5 Total Cyanide mg/L
Cyanide, Available 57-12-5_AVAIL OIA1677 mg/L
Fluoride 16984-48-8 Anions, Ion Chromatography mg/L
Fluoride 16984-48-8 EPA 300.0 mg/L
Fluoride 16984-48-8 SM 4500 F C mg/L
Metals
Antimony 7440-36-0 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 6010 mg/L
Barium 7440-39-3 EPA 6010 mg/L
Beryllium 7440-41-7 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Calcium 7440-70-2 Metals (ICP) mg/L
Chromium, total 7440-47-3 EPA 200.7 Rev 4.4 1994 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Copper 7440-50-8 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Magnesium 7439-95-4 Metals (ICP) mg/L
Mercury 7439-97-6 EPA 245.1 Rev 3.0 1994 mg/L
Mercury 7439-97-6 EPA 7470 mg/L
Nickel 7440-02-0 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 6010 mg/L
Silver 7440-22-4 EPA 200.7 Rev 4.4 1994 mg/L
Silver 7440-22-4 EPA 6010 mg/L
Thallium 7440-28-0 EPA 200.7 Rev 4.4 1994 mg/L
Zinc 7440-66-6 EPA 200.7 Rev 4.4 1994 mg/L
PAHs
Acenaphthene 83-32-9 EPA 625.1 mg/L
Acenaphthene 83-32-9 EPA 8270 mg/L
Acenaphthene 83-32-9 EPA 8270D by SIM mg/L
Acenaphthylene 208-96-8 EPA 625.1 mg/L
Acenaphthylene 208-96-8 EPA 8270 mg/L
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/L
Anthracene 120-12-7 EPA 625.1 mg/L
Chemical Name CAS-RN Method Units
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
43 -- -- -- -- -- -- --160 -- -- -- -- -- -- --
<5 U -- -- -- -- -- --<5 U -- -- -- -- -- --
44 -- -- -- -- -- -- --160 -- -- -- -- -- -- --
<0.4 U -- -- -- -- -- --0.21 J -- -- -- -- -- --
6 -- -- -- -- -- -- --11 -- -- -- -- -- -- --
6.8 -- -- -- -- -- -- --11 -- -- -- -- -- -- --
50 -- -- -- -- -- -- --110 -- -- -- -- -- -- --
7.4 -- -- -- -- -- -- --7.3 -- -- -- -- -- -- --
4.4 -- -- -- -- -- -- --67 -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.069 -- -- -- -- -- -- --0.062 --
-- -- -- --0.064 --0.078 -- -- -- -- --0.051 --0.071 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
<0.002 U -- -- -- -- -- --0.067 -- -- -- -- -- -- --
-- -- -- --0.0034 --0.008 -- -- -- -- --0.0038 --0.0086 --
<0.08 U -- -- -- -- -- --0.52 -- -- -- -- -- -- --
-- -- -- --1.2 --1.7 -- -- -- -- --2.2 --1.8 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
11 -- -- -- -- -- -- --26 -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
5.2 -- -- -- -- -- -- --12 -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.0005 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.0005 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
67 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Anthracene 120-12-7 EPA 8270 mg/L
Anthracene 120-12-7 EPA 8270D by SIM mg/L
Benzo[a]anthracene 56-55-3 EPA 625.1 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/L
Benzo[a]pyrene 50-32-8 EPA 625.1 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/L
Benzo[b]fluoranthene 205-99-2 EPA 625.1 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 625.1 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/L
Benzo[k]fluoranthene 207-08-9 EPA 625.1 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/L
Chrysene 218-01-9 EPA 625.1 mg/L
Chrysene 218-01-9 EPA 8270 mg/L
Chrysene 218-01-9 EPA 8270D by SIM mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 625.1 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/L
Fluoranthene 206-44-0 EPA 625.1 mg/L
Fluoranthene 206-44-0 EPA 8270 mg/L
Fluoranthene 206-44-0 EPA 8270D by SIM mg/L
Fluorene 86-73-7 EPA 625.1 mg/L
Fluorene 86-73-7 EPA 8270 mg/L
Fluorene 86-73-7 EPA 8270D by SIM mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 625.1 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/L
Naphthalene 91-20-3 EPA 625.1 mg/L
Naphthalene 91-20-3 EPA 8270 mg/L
Naphthalene 91-20-3 EPA 8270D by SIM mg/L
Phenanthrene 85-01-8 EPA 625.1 mg/L
Phenanthrene 85-01-8 EPA 8270 mg/L
Phenanthrene 85-01-8 EPA 8270D by SIM mg/L
Pyrene 129-00-0 EPA 625.1 mg/L
Pyrene 129-00-0 EPA 8270 mg/L
Pyrene 129-00-0 EPA 8270D by SIM mg/L
Total HMW PAHs PAHs_highMW_ND=0 -- mg/L
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/L
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/L
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/L
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 608.3 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 608.3 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00005 U -- -- -- -- -- --<0.00005 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00005 U -- -- -- -- -- --<0.00005 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0001 U -- -- -- -- -- --<0.0001 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00005 U -- -- -- -- -- --<0.00005 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0002 U -- -- -- -- -- --<0.0002 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0002 U -- -- -- -- -- --<0.0002 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0001 U -- -- -- -- -- --<0.0001 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00015 U -- -- -- -- -- --<0.00015 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0003 U -- -- -- -- -- --<0.0003 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00031 U -- -- -- -- -- --<0.00031 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.00005 U -- -- -- -- -- --<0.00005 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0015 U -- -- -- -- -- --<0.0015 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0002 U -- -- -- -- -- --<0.0002 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0001 U -- -- -- -- -- --<0.0001 U -- --
-- -- -- --<0 U -- -- -- -- -- --<0 U -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.0005 U -- --
-- -- -- --<0.001 U -- -- -- -- -- --<0.001 U -- --
-- -- -- --<0 U -- -- -- -- -- --<0 U -- --
-- -- -- --<0.00168 U -- -- -- -- -- --<0.00168 U -- --
-- -- -- --<0.00336 U -- -- -- -- -- --<0.00336 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.00042 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.00042 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
68 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 608.3 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 608.3 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 608.3 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 608.3 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/L
Total PCBs (Aroclors) totPCB_ND=0 -- mg/L
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/L
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/L
PCB Congeners
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/L
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/L
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/L
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/L
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/L
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/L
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/L
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/L
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/L
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/L
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/L
Dichlorobiphenyl, 3,4- (PCB 12) 2974-92-7 1668A mg/L
PCB 12/13 E52450566 1668A mg/L
Dichlorobiphenyl, 3,4'- (PCB 13) 2974-90-5 1668A mg/L
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/L
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/L
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/L
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/L
Trichlorobiphenyl, 2,2',5- (PCB 18) 37680-65-2 1668A mg/L
PCB 18/30 E52450574 1668A mg/L
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/L
Trichlorobiphenyl, 2,3,3'- (PCB 20) 38444-84-7 1668A mg/L
PCB 20/28 E52450582 1668A mg/L
Trichlorobiphenyl, 2,3,4- (PCB 21) 55702-46-0 1668A mg/L
PCB 21/33 E52450590 1668A mg/L
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/L
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/L
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/L
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/L
Trichlorobiphenyl, 2,3',5- (PCB 26) 38444-81-4 1668A mg/L
PCB 26/29 E52450608 1668A mg/L
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/L
Trichlorobiphenyl, 2,4,4'- (PCB 28) 7012-37-5 1668A mg/L
Trichlorobiphenyl, 2,4,5- (PCB 29) 15862-07-4 1668A mg/L
Trichlorobiphenyl, 2,4,6- (PCB 30) 35693-92-6 1668A mg/L
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/L
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.00042 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.00042 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.00042 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.00042 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.0005 U -- -- -- -- -- --<0.00042 U -- --
-- -- -- --<0 U -- -- -- -- -- --<0 U -- --
-- -- -- --<0.00175 U -- -- -- -- -- --<0.00147 U -- --
-- -- -- --<0.0035 U -- -- -- -- -- --<0.00294 U -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.00000256 U -- -- -- -- -- --<0.00000262 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000345 U -- -- -- -- -- --<0.000000353 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000135 U -- -- -- -- -- --<0.00000138 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000141 U -- -- -- -- -- --<0.00000144 U -- -- -- --
-- --<0.000000994 U -- -- -- -- -- --<0.00000102 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000136 U -- -- -- -- -- --<0.00000139 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
69 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Trichlorobiphenyl, 2,3',4'- (PCB 33) 38444-86-9 1668A mg/L
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/L
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/L
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/L
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/L
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/L
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,3'- (PCB 40) 38444-93-8 1668A mg/L
PCB 40/41/71 E52450616 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4- (PCB 41) 52663-59-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5- (PCB 43) 70362-46-8 1668A mg/L
PCB 43/73 (43/73) 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5'- (PCB 44) 41464-39-5 1668A mg/L
PCB 44/47/65 E52450624 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6- (PCB 45) 70362-45-7 1668A mg/L
PCB 45/51 E52450632 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,4'- (PCB 47) 2437-79-8 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5'- (PCB 49) 41464-40-8 1668A mg/L
PCB 49/69 E52450640 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6- (PCB 50) 62796-65-0 1668A mg/L
PCB 50/53 E52450657 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6'- (PCB 51) 68194-04-7 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,6'- (PCB 53) 41464-41-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',6- (PCB 59) 74472-33-6 1668A mg/L
PCB 59/62/75 E52450665 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,5- (PCB 61) 33284-53-6 1668A mg/L
PCB 61/70/74/76 E52450673 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,6- (PCB 62) 54230-22-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,5,6- (PCB 65) 33284-54-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,6- (PCB 69) 60233-24-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',5- (PCB 70) 32598-11-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',6- (PCB 71) 41464-46-4 1668A mg/L
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',5- (PCB 74) 32690-93-0 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',6- (PCB 75) 32598-12-2 1668A mg/L
Tetrachlorobiphenyl, 2',3,4,5- (PCB 76) 70362-48-0 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000554 U -- -- -- -- -- --<0.000000567 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- --<0.000000261 U -- -- -- -- -- --<0.000000267 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000157 U -- -- -- -- -- --<0.0000016 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000157 U -- -- -- -- -- --<0.0000016 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.00000106 -- -- -- -- -- -- --<0.00000107 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.00000167 -- -- -- -- -- -- --<0.00000165 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --0.00000059 -- -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000157 U -- -- -- -- -- --<0.0000016 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.00000225 -- -- -- -- -- -- --<0.00000214 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --0.000000776 -- -- -- -- -- -- --0.000000761 -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.00000146 -- -- -- -- -- -- --0.00000139 -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
70 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/L
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,4'- (PCB 85) 65510-45-4 1668A mg/L
PCB 85/117/116 E52450699 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5- (PCB 86) 55312-69-1 1668A mg/L
PCB 86/87/97/108/119/125 E52450707 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5'- (PCB 87) 38380-02-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6- (PCB 88) 55215-17-3 1668A mg/L
PCB 88/91 E52450715 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',5- (PCB 90) 68194-07-0 1668A mg/L
PCB 90/101/113 E52450723 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',6- (PCB 91) 68194-05-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6- (PCB 93) 73575-56-1 1668A mg/L
PCB 93/98/100/102 (93/98/100/102) 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/L
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,5- (PCB 97) 41464-51-1 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,6- (PCB 98) 60233-25-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',6- (PCB 100) 39485-83-1 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,5'- (PCB 101) 37680-73-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,6'- (PCB 102) 68194-06-9 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/L
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',5- (PCB 107) 70424-68-9 1668A mg/L
PCB 107/124 E52450749 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5'- (PCB 108) 70362-41-3 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',6- (PCB 110) 38380-03-9 1668A mg/L
PCB 110/115 E52450756 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5',6- (PCB 113) 68194-10-5 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',6- (PCB 115) 74472-38-1 1668A mg/L
Pentachlorobiphenyl, 2,3,4,5,6- (PCB 116) 18259-05-7 1668A mg/L
Pentachlorobiphenyl, 2,3,4',5,6- (PCB 117) 68194-11-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',6- (PCB 119) 56558-17-9 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/L
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/L
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,5'- (PCB 124) 70424-70-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,6- (PCB 125) 74472-39-2 1668A mg/L
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/L
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000157 U -- -- -- -- -- --<0.0000016 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000314 U -- -- -- -- -- --<0.00000321 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000157 U -- -- -- -- -- --<0.0000016 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000209 U -- -- -- -- -- --<0.00000214 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000994 U -- -- -- -- -- --<0.00000102 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.000000655 -- -- -- -- -- -- --0.000000639 -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --0.000000588 -- -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.0000014 -- -- -- -- -- -- --0.00000119 -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.00000104 -- -- -- -- -- -- --0.000000864 -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
71 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Hexachlorobiphenyl, 2,2',3,3',4,4'- (PCB 128) 38380-07-3 1668A mg/L
PCB 128/166 E52450764 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5- (PCB 129) 55215-18-4 1668A mg/L
PCB 129/138/163 (129/138/163) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6- (PCB 134) 52704-70-8 1668A mg/L
PCB 134/143 E52450780 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6'- (PCB 135) 52744-13-5 1668A mg/L
PCB 135/151 (135/151) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5'- (PCB 138) 35065-28-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6- (PCB 139) 56030-56-9 1668A mg/L
PCB 139/140 E52450806 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6'- (PCB 140) 59291-64-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6'- (PCB 143) 68194-15-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6- (PCB 147) 68194-13-8 1668A mg/L
PCB 147/149 E52450814 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5',6- (PCB 149) 38380-04-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,5',6- (PCB 151) 52663-63-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,5'- (PCB 153) 35065-27-1 1668A mg/L
PCB 153/168 E52450822 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 1668A mg/L
PCB 156/157 E52450830 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,6- (PCB 163) 74472-44-9 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/L
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/L
Hexachlorobiphenyl, 2,3,4,4',5,6- (PCB 166) 41411-63-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5',6- (PCB 168) 59291-65-5 1668A mg/L
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',6- (PCB 171) 52663-71-5 1668A mg/L
PCB 171/173 E52450848 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,6- (PCB 173) 68194-16-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000157 U -- -- -- -- -- --<0.0000016 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --0.00000117 -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.00000131 -- -- -- -- -- -- --0.0000014 -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
72 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,5'- (PCB 180) 35065-29-3 1668A mg/L
PCB 180/193 E52450855 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5',6- (PCB 183) 52663-69-1 1668A mg/L
PCB 183/185 E52450863 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,5',6- (PCB 185) 52712-05-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4',5,5',6- (PCB 193) 69782-91-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',6,6'- (PCB 197) 33091-17-7 1668A mg/L
PCB 197/200 E52450871 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,5',6- (PCB 198) 68194-17-2 1668A mg/L
PCB 198/199 E52450889 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4',5,5',6'- (PCB 199) 52663-75-9 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,6,6'- (PCB 200) 52663-73-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/L
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/L
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/L
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/L
Pesticides
Aldrin 309-00-2 EPA 608.3 mg/L
alpha BHC (Alpha Hexachlorocyclohexane) 319-84-6 EPA 608.3 mg/L
Alpha Endosulfan 959-98-8 EPA 608.3 mg/L
beta BHC (Beta Hexachlorocyclohexane) 319-85-7 EPA 608.3 mg/L
Beta Endosulfan 33213-65-9 EPA 608.3 mg/L
Chlordane 57-74-9 EPA 608.3 mg/L
delta BHC (Delta Hexachlorocyclohexane) 319-86-8 EPA 608.3 mg/L
Dieldrin 60-57-1 EPA 608.3 mg/L
Endosulfan sulfate 1031-07-8 EPA 608.3 mg/L
Endrin 72-20-8 EPA 608.3 mg/L
Endrin Aldehyde 7421-93-4 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- --0.000000569 -- -- -- -- -- -- --0.000000648 -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --0.00000117 -- -- -- -- -- -- --0.00000133 -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000105 U -- -- -- -- -- --<0.00000107 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --0.000000694 -- -- -- -- -- -- --0.000000806 -- -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- --<0.000000523 U -- -- -- -- -- --<0.000000535 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000157 U -- -- -- -- -- --<0.0000016 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000157 U -- -- -- -- -- --<0.0000016 U -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --<0.000000784 U -- -- -- -- -- --<0.000000802 U -- -- -- --
-- --0.000015232 -- -- -- -- -- -- --0.000010198 -- -- -- -- --
-- --0.000064751 -- -- -- -- -- -- --6.32365E-05 -- -- -- -- --
-- --0.00011427 -- -- -- -- -- -- --0.000116275 -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
73 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
gamma BHC (Lindane) 58-89-9 EPA 608.3 mg/L
Heptachlor 76-44-8 EPA 608.3 mg/L
Heptachlor Epoxide 1024-57-3 EPA 608.3 mg/L
P,P'-DDD 72-54-8 EPA 608.3 mg/L
P,P'-DDE 72-55-9 EPA 608.3 mg/L
P,P'-DDT 50-29-3 EPA 608.3 mg/L
Toxaphene 8001-35-2 EPA 608.3 mg/L
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270 mg/L
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/L
1,2-Dichlorobenzene 95-50-1 EPA 625.1 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/L
1,2-Diphenylhydrazine 122-66-7 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 625.1 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 625.1 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/L
2-Chloronaphthalene 91-58-7 EPA 625.1 mg/L
2-Chloronaphthalene 91-58-7 EPA 8270 mg/L
2-Chlorophenol 95-57-8 EPA 625.1 mg/L
2-Chlorophenol 95-57-8 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 625.1 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/L
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/L
2-Nitroaniline 88-74-4 EPA 8270 mg/L
2-Nitrophenol 88-75-5 EPA 625.1 mg/L
2-Nitrophenol 88-75-5 EPA 8270 mg/L
2,4-Dichlorophenol 120-83-2 EPA 625.1 mg/L
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/L
2,4-Dimethylphenol 105-67-9 EPA 625.1 mg/L
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/L
2,4-Dinitrophenol 51-28-5 EPA 625.1 mg/L
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 625.1 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/L
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 625.1 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 625.1 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/L
3- & 4-Methylphenol edms_0009 EPA 625.1 mg/L
3- & 4-Methylphenol edms_0009 EPA 8270 mg/L
3-Nitroaniline 99-09-2 EPA 8270 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 625.1 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 625.1 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 625.1 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/L
4-Chloroaniline 106-47-8 EPA 8270 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 625.1 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.002 U -- -- -- -- -- --<0.002 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.002 U -- -- -- -- -- --<0.002 U -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
74 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
4-Nitroaniline 100-01-6 EPA 8270 mg/L
4-Nitrophenol 100-02-7 EPA 625.1 mg/L
4-Nitrophenol 100-02-7 EPA 8270 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 625.1 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/L
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/L
Benzidine 92-87-5 EPA 625.1 mg/L
Benzoic acid 65-85-0 EPA 8270 mg/L
Benzyl Alcohol 100-51-6 EPA 8270 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 625.1 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 625.1 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 625.1 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 625.1 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 625.1 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 625.1 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/L
Di-N-Octylphthalate 117-84-0 EPA 625.1 mg/L
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/L
Dibenzofuran 132-64-9 EPA 8270 mg/L
Diethyl Phthalate 84-66-2 EPA 625.1 mg/L
Diethyl Phthalate 84-66-2 EPA 8270 mg/L
Dimethyl Phthalate 131-11-3 EPA 625.1 mg/L
Dimethyl Phthalate 131-11-3 EPA 8270 mg/L
Hexachlorobenzene 118-74-1 EPA 625.1 mg/L
Hexachlorobenzene 118-74-1 EPA 8270 mg/L
Hexachlorobutadiene 87-68-3 EPA 625.1 mg/L
Hexachlorobutadiene 87-68-3 EPA 8270 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 625.1 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/L
Hexachloroethane 67-72-1 EPA 625.1 mg/L
Hexachloroethane 67-72-1 EPA 8270 mg/L
Isophorone 78-59-1 EPA 625.1 mg/L
Isophorone 78-59-1 EPA 8270 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 625.1 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 625.1 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 625.1 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/L
Nitrobenzene 98-95-3 EPA 625.1 mg/L
Nitrobenzene 98-95-3 EPA 8270 mg/L
Pentachlorophenol 87-86-5 EPA 625.1 mg/L
Pentachlorophenol 87-86-5 EPA 8270 mg/L
Phenol 108-95-2 EPA 420.4 Rev 1.0 1993 mg/L
Phenol 108-95-2 EPA 625.1 mg/L
Phenol 108-95-2 EPA 8270 mg/L
VOCs
1,1-Dichloroethane 75-34-3 EPA 624 mg/L
1,1-Dichloroethane 75-34-3 EPA 8260 mg/L
1,1-Dichloroethene 75-35-4 EPA 624 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
75 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
1,1-Dichloroethene 75-35-4 EPA 8260 mg/L
1,1-Dichloropropene 563-58-6 EPA 8260 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 624 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/L
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 624 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 624 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/L
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/L
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 624 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/L
1,2-Dichloroethane 107-06-2 EPA 624 mg/L
1,2-Dichloroethane 107-06-2 EPA 8260 mg/L
1,2-dichloroethene (cis+trans) 540-59-0 EPA 8260 mg/L
1,2-Dichloropropane 78-87-5 EPA 624 mg/L
1,2-Dichloropropane 78-87-5 EPA 8260 mg/L
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/L
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 624 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/L
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 624 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/L
1,3-Dichloropropane 142-28-9 EPA 8260 mg/L
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 624 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/L
2-Chloroethyl Vinyl Ether 110-75-8 EPA 624 mg/L
2-Chlorotoluene 95-49-8 EPA 8260 mg/L
2-Hexanone 591-78-6 EPA 8260 mg/L
2,2-Dichloropropane 594-20-7 EPA 8260 mg/L
4-Chlorotoluene 106-43-4 EPA 8260 mg/L
Acetone 67-64-1 EPA 8260 mg/L
Acrolein 107-02-8 EPA 624 mg/L
Acrylonitrile 107-13-1 EPA 624 mg/L
Benzene 71-43-2 EPA 624 mg/L
Benzene 71-43-2 EPA 8260 mg/L
Bromobenzene 108-86-1 EPA 8260 mg/L
Bromochloromethane 74-97-5 EPA 8260 mg/L
Bromodichloromethane 75-27-4 EPA 624 mg/L
Bromodichloromethane 75-27-4 EPA 8260 mg/L
Bromoform 75-25-2 EPA 624 mg/L
Bromoform 75-25-2 EPA 8260 mg/L
Bromomethane 74-83-9 EPA 624 mg/L
Bromomethane 74-83-9 EPA 8260 mg/L
Carbon Tetrachloride 56-23-5 EPA 624 mg/L
Carbon Tetrachloride 56-23-5 EPA 8260 mg/L
Chlorobenzene 108-90-7 EPA 624 mg/L
Chlorobenzene 108-90-7 EPA 8260 mg/L
Chloroethane 75-00-3 EPA 624 mg/L
Chloroethane 75-00-3 EPA 8260 mg/L
Chloroform 67-66-3 EPA 624 mg/L
Chloroform 67-66-3 EPA 8260 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
76 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Chloromethane 74-87-3 EPA 624 mg/L
Chloromethane 74-87-3 EPA 8260 mg/L
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 624 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/L
Dibromochloromethane 124-48-1 EPA 624 mg/L
Dibromochloromethane 124-48-1 EPA 8260 mg/L
Dibromomethane 74-95-3 EPA 8260 mg/L
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/L
Ethylbenzene 100-41-4 EPA 624 mg/L
Ethylbenzene 100-41-4 EPA 8260 mg/L
Hexachlorobutadiene 87-68-3 EPA 8260 mg/L
Isopropyl Ether 108-20-3 EPA 8260 mg/L
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/L
M,P-Xylene 179601-23-1 EPA 8260 mg/L
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/L
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/L
Methylene Chloride 75-09-2 EPA 624 mg/L
Methylene Chloride 75-09-2 EPA 8260 mg/L
N-Butylbenzene 104-51-8 EPA 8260 mg/L
N-Propylbenzene 103-65-1 EPA 8260 mg/L
Naphthalene 91-20-3 EPA 8260 mg/L
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/L
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/L
Sec-Butylbenzene 135-98-8 EPA 8260 mg/L
Styrene 100-42-5 EPA 8260 mg/L
T-Butylbenzene 98-06-6 EPA 8260 mg/L
Tert-Butyl Alcohol 75-65-0 EPA 8260 mg/L
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/L
Tetrachloroethylene 127-18-4 EPA 624 mg/L
Tetrachloroethylene 127-18-4 EPA 8260 mg/L
Toluene 108-88-3 EPA 624 mg/L
Toluene 108-88-3 EPA 8260 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 624 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 624 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/L
Trichloroethylene 79-01-6 EPA 624 mg/L
Trichloroethylene 79-01-6 EPA 8260 mg/L
Trichlorofluoromethane 75-69-4 EPA 624 mg/L
Trichlorofluoromethane 75-69-4 EPA 8260 mg/L
Vinyl Acetate 108-05-4 EPA 8260 mg/L
Vinyl Chloride 75-01-4 EPA 624 mg/L
Vinyl Chloride 75-01-4 EPA 8260 mg/L
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ABL-SW012Upgradient Little
Mountain CreekABL-SW012-F010
680-188269
9/1/2020
1:30:00 --
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
92391628
7/11/2018
13:25:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F005
10439456
7/11/2018
14:00:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F010
680-188271
9/1/2020
11:30:00
ABL-SW013
Eastern Drainage Ditch
ABL-SW013-F009
680-186392
7/14/2020
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
92391628
7/11/2018
12:50:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F005
10439456
7/11/2018
14:30:00
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F009
680-186392
7/14/2020
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
77 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB Alkalinity mg/L
Alkalinity, Carbonate (As CaCO3) ALKC Alkalinity mg/L
Alkalinity, Total (As CaCO3) ALK Alkalinity mg/L
Bromide 24959-67-9 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Anions, Ion Chromatography mg/L
Chloride (As Cl) 16887-00-6 Chloride, Total mg/L
Hardness (As CaCO3) HARD Total Hardness (as CaCO3) by calculation mg/L
pH PH pH SU
Sulfate (As SO4) 14808-79-8 Anions, Ion Chromatography mg/L
Total Hardness TOTHARD EPA 200.7 Rev 4.4 1994 mg/L
Inorganics
Cyanide 57-12-5 D7511-12 mg/L
Cyanide 57-12-5 EPA 9012B mg/L
Cyanide 57-12-5 SM 4500-CN mg/L
Cyanide 57-12-5 Total Cyanide mg/L
Cyanide, Available 57-12-5_AVAIL OIA1677 mg/L
Fluoride 16984-48-8 Anions, Ion Chromatography mg/L
Fluoride 16984-48-8 EPA 300.0 mg/L
Fluoride 16984-48-8 SM 4500 F C mg/L
Metals
Antimony 7440-36-0 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 200.7 Rev 4.4 1994 mg/L
Arsenic 7440-38-2 EPA 6010 mg/L
Barium 7440-39-3 EPA 6010 mg/L
Beryllium 7440-41-7 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 200.7 Rev 4.4 1994 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Cadmium 7440-43-9 EPA 6010 mg/L
Calcium 7440-70-2 Metals (ICP) mg/L
Chromium, total 7440-47-3 EPA 200.7 Rev 4.4 1994 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Chromium, total 7440-47-3 EPA 6010 mg/L
Copper 7440-50-8 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 200.7 Rev 4.4 1994 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Lead 7439-92-1 EPA 6010 mg/L
Magnesium 7439-95-4 Metals (ICP) mg/L
Mercury 7439-97-6 EPA 245.1 Rev 3.0 1994 mg/L
Mercury 7439-97-6 EPA 7470 mg/L
Nickel 7440-02-0 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 200.7 Rev 4.4 1994 mg/L
Selenium 7782-49-2 EPA 6010 mg/L
Silver 7440-22-4 EPA 200.7 Rev 4.4 1994 mg/L
Silver 7440-22-4 EPA 6010 mg/L
Thallium 7440-28-0 EPA 200.7 Rev 4.4 1994 mg/L
Zinc 7440-66-6 EPA 200.7 Rev 4.4 1994 mg/L
PAHs
Acenaphthene 83-32-9 EPA 625.1 mg/L
Acenaphthene 83-32-9 EPA 8270 mg/L
Acenaphthene 83-32-9 EPA 8270D by SIM mg/L
Acenaphthylene 208-96-8 EPA 625.1 mg/L
Acenaphthylene 208-96-8 EPA 8270 mg/L
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/L
Anthracene 120-12-7 EPA 625.1 mg/L
Chemical Name CAS-RN Method Units
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
170 -- -- -- -- -- -- --150 -- -- --
<5 U -- -- -- -- -- --<5 U -- --
170 -- -- -- -- -- -- --150 -- -- --
0.21 J -- -- -- -- -- --<0.4 U -- --
11 -- -- -- -- -- -- --6.9 -- -- --
12 -- -- -- -- -- -- --7.9 -- -- --
100 -- -- -- -- -- -- --83 -- -- --
7 -- -- -- -- -- -- --7.1 -- -- --
69 -- -- -- -- -- -- --24 -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- --0.025 -- -- -- -- --
-- -- -- --0.014 --0.049 -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
0.07 -- -- -- -- -- -- --0.018 -- -- --
-- -- -- --0.0008 J <0.0015 U -- --<0.0003 U
0.63 -- -- -- -- -- -- --2.7 -- -- --
-- -- -- --6 --5.8 -- -- -- -- --
-- -- -- -- -- -- -- -- -- --0.09 --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
22 -- -- -- -- -- -- --21 -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
11 -- -- -- -- -- -- --7.4 -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00017 U
-- -- -- --<0.0005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00018 U
-- -- -- --<0.0005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
78 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Anthracene 120-12-7 EPA 8270 mg/L
Anthracene 120-12-7 EPA 8270D by SIM mg/L
Benzo[a]anthracene 56-55-3 EPA 625.1 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270 mg/L
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/L
Benzo[a]pyrene 50-32-8 EPA 625.1 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270 mg/L
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/L
Benzo[b]fluoranthene 205-99-2 EPA 625.1 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/L
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 625.1 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/L
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/L
Benzo[k]fluoranthene 207-08-9 EPA 625.1 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/L
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/L
Chrysene 218-01-9 EPA 625.1 mg/L
Chrysene 218-01-9 EPA 8270 mg/L
Chrysene 218-01-9 EPA 8270D by SIM mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 625.1 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/L
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/L
Fluoranthene 206-44-0 EPA 625.1 mg/L
Fluoranthene 206-44-0 EPA 8270 mg/L
Fluoranthene 206-44-0 EPA 8270D by SIM mg/L
Fluorene 86-73-7 EPA 625.1 mg/L
Fluorene 86-73-7 EPA 8270 mg/L
Fluorene 86-73-7 EPA 8270D by SIM mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 625.1 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/L
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/L
Naphthalene 91-20-3 EPA 625.1 mg/L
Naphthalene 91-20-3 EPA 8270 mg/L
Naphthalene 91-20-3 EPA 8270D by SIM mg/L
Phenanthrene 85-01-8 EPA 625.1 mg/L
Phenanthrene 85-01-8 EPA 8270 mg/L
Phenanthrene 85-01-8 EPA 8270D by SIM mg/L
Pyrene 129-00-0 EPA 625.1 mg/L
Pyrene 129-00-0 EPA 8270 mg/L
Pyrene 129-00-0 EPA 8270D by SIM mg/L
Total HMW PAHs PAHs_highMW_ND=0 -- mg/L
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/L
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/L
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/L
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/L
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 608.3 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/L
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 608.3 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/L
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- -- -- -- -- -- -- -- -- --<0.00018 U
-- -- -- --<0.00005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00018 U
-- -- -- --<0.00005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00016 U
-- -- -- --<0.0001 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00019 U
-- -- -- --<0.00005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00018 U
-- -- -- --<0.0002 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00065 U
-- -- -- --<0.0002 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00017 U
-- -- -- --<0.0001 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00018 U
-- -- -- --<0.00015 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00019 U
-- -- -- --<0.0003 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00026 U
-- -- -- --<0.00031 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00024 U
-- -- -- --<0.00005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00017 U
-- -- -- --<0.0015 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00051 U
-- -- -- --<0.0002 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.00019 U
-- -- -- --<0.0001 U -- -- -- -- -- --
-- -- -- --<0 U -- -- -- --<0 U
-- -- -- --<0.0005 U -- -- -- --<0.00107 U
-- -- -- --<0.001 U -- -- -- --<0.00214 U
-- -- -- --<0 U -- -- -- --<0 U
-- -- -- --<0.00168 U -- -- -- --<0.00083 U
-- -- -- --<0.00336 U -- -- -- --<0.00166 U
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.0001 U
-- -- -- --<0.0005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.0001 U
-- -- -- --<0.0005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
79 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/L
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 608.3 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/L
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 608.3 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/L
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 608.3 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/L
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 608.3 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/L
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/L
Total PCBs (Aroclors) totPCB_ND=0 -- mg/L
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/L
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/L
PCB Congeners
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/L
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/L
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/L
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/L
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/L
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/L
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/L
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/L
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/L
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/L
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/L
Dichlorobiphenyl, 3,4- (PCB 12) 2974-92-7 1668A mg/L
PCB 12/13 E52450566 1668A mg/L
Dichlorobiphenyl, 3,4'- (PCB 13) 2974-90-5 1668A mg/L
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/L
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/L
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/L
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/L
Trichlorobiphenyl, 2,2',5- (PCB 18) 37680-65-2 1668A mg/L
PCB 18/30 E52450574 1668A mg/L
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/L
Trichlorobiphenyl, 2,3,3'- (PCB 20) 38444-84-7 1668A mg/L
PCB 20/28 E52450582 1668A mg/L
Trichlorobiphenyl, 2,3,4- (PCB 21) 55702-46-0 1668A mg/L
PCB 21/33 E52450590 1668A mg/L
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/L
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/L
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/L
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/L
Trichlorobiphenyl, 2,3',5- (PCB 26) 38444-81-4 1668A mg/L
PCB 26/29 E52450608 1668A mg/L
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/L
Trichlorobiphenyl, 2,4,4'- (PCB 28) 7012-37-5 1668A mg/L
Trichlorobiphenyl, 2,4,5- (PCB 29) 15862-07-4 1668A mg/L
Trichlorobiphenyl, 2,4,6- (PCB 30) 35693-92-6 1668A mg/L
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/L
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- -- -- -- -- -- -- -- -- --<0.00012 U
-- -- -- --<0.0005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000077 U
-- -- -- --<0.0005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000095 U
-- -- -- --<0.0005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000095 U
-- -- -- --<0.0005 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.000056 U
-- -- -- --<0.0005 U -- -- -- -- -- --
-- -- -- --<0 U -- -- -- --<0 U
-- -- -- --<0.00175 U -- -- -- --<0.0003215 U
-- -- -- --<0.0035 U -- -- -- --<0.000643 U
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.00000254 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000342 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000134 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0000014 U -- -- -- -- -- -- -- --
-- --<0.000000985 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000135 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
80 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Trichlorobiphenyl, 2,3',4'- (PCB 33) 38444-86-9 1668A mg/L
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/L
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/L
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/L
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/L
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/L
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,3'- (PCB 40) 38444-93-8 1668A mg/L
PCB 40/41/71 E52450616 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4- (PCB 41) 52663-59-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5- (PCB 43) 70362-46-8 1668A mg/L
PCB 43/73 (43/73) 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,5'- (PCB 44) 41464-39-5 1668A mg/L
PCB 44/47/65 E52450624 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6- (PCB 45) 70362-45-7 1668A mg/L
PCB 45/51 E52450632 1668A mg/L
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,4'- (PCB 47) 2437-79-8 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,5'- (PCB 49) 41464-40-8 1668A mg/L
PCB 49/69 E52450640 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6- (PCB 50) 62796-65-0 1668A mg/L
PCB 50/53 E52450657 1668A mg/L
Tetrachlorobiphenyl, 2,2',4,6'- (PCB 51) 68194-04-7 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/L
Tetrachlorobiphenyl, 2,2',5,6'- (PCB 53) 41464-41-9 1668A mg/L
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,3',6- (PCB 59) 74472-33-6 1668A mg/L
PCB 59/62/75 E52450665 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,5- (PCB 61) 33284-53-6 1668A mg/L
PCB 61/70/74/76 E52450673 1668A mg/L
Tetrachlorobiphenyl, 2,3,4,6- (PCB 62) 54230-22-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/L
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/L
Tetrachlorobiphenyl, 2,3,5,6- (PCB 65) 33284-54-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/L
Tetrachlorobiphenyl, 2,3',4,6- (PCB 69) 60233-24-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',5- (PCB 70) 32598-11-1 1668A mg/L
Tetrachlorobiphenyl, 2,3',4',6- (PCB 71) 41464-46-4 1668A mg/L
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/L
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',5- (PCB 74) 32690-93-0 1668A mg/L
Tetrachlorobiphenyl, 2,4,4',6- (PCB 75) 32598-12-2 1668A mg/L
Tetrachlorobiphenyl, 2',3,4,5- (PCB 76) 70362-48-0 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/L
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000549 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- --<0.000000259 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000155 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000155 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0000016 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000155 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000207 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --0.000000603 -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --0.00000108 -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
81 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/L
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,4'- (PCB 85) 65510-45-4 1668A mg/L
PCB 85/117/116 E52450699 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5- (PCB 86) 55312-69-1 1668A mg/L
PCB 86/87/97/108/119/125 E52450707 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,5'- (PCB 87) 38380-02-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6- (PCB 88) 55215-17-3 1668A mg/L
PCB 88/91 E52450715 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',5- (PCB 90) 68194-07-0 1668A mg/L
PCB 90/101/113 E52450723 1668A mg/L
Pentachlorobiphenyl, 2,2',3,4',6- (PCB 91) 68194-05-8 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6- (PCB 93) 73575-56-1 1668A mg/L
PCB 93/98/100/102 (93/98/100/102) 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/L
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/L
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,5- (PCB 97) 41464-51-1 1668A mg/L
Pentachlorobiphenyl, 2,2',3',4,6- (PCB 98) 60233-25-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/L
Pentachlorobiphenyl, 2,2',4,4',6- (PCB 100) 39485-83-1 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,5'- (PCB 101) 37680-73-2 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5,6'- (PCB 102) 68194-06-9 1668A mg/L
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/L
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',5- (PCB 107) 70424-68-9 1668A mg/L
PCB 107/124 E52450749 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,5'- (PCB 108) 70362-41-3 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/L
Pentachlorobiphenyl, 2,3,3',4',6- (PCB 110) 38380-03-9 1668A mg/L
PCB 110/115 E52450756 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/L
Pentachlorobiphenyl, 2,3,3',5',6- (PCB 113) 68194-10-5 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/L
Pentachlorobiphenyl, 2,3,4,4',6- (PCB 115) 74472-38-1 1668A mg/L
Pentachlorobiphenyl, 2,3,4,5,6- (PCB 116) 18259-05-7 1668A mg/L
Pentachlorobiphenyl, 2,3,4',5,6- (PCB 117) 68194-11-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/L
Pentachlorobiphenyl, 2,3',4,4',6- (PCB 119) 56558-17-9 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/L
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/L
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/L
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,5'- (PCB 124) 70424-70-3 1668A mg/L
Pentachlorobiphenyl, 2',3,4,5,6- (PCB 125) 74472-39-2 1668A mg/L
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/L
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000155 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000311 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000155 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000207 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000985 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000663 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
82 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Hexachlorobiphenyl, 2,2',3,3',4,4'- (PCB 128) 38380-07-3 1668A mg/L
PCB 128/166 E52450764 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5- (PCB 129) 55215-18-4 1668A mg/L
PCB 129/138/163 (129/138/163) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6- (PCB 134) 52704-70-8 1668A mg/L
PCB 134/143 E52450780 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',5,6'- (PCB 135) 52744-13-5 1668A mg/L
PCB 135/151 (135/151) 1668A mg/L
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',5'- (PCB 138) 35065-28-2 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6- (PCB 139) 56030-56-9 1668A mg/L
PCB 139/140 E52450806 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,4',6'- (PCB 140) 59291-64-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5,6'- (PCB 143) 68194-15-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6- (PCB 147) 68194-13-8 1668A mg/L
PCB 147/149 E52450814 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',5',6- (PCB 149) 38380-04-0 1668A mg/L
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,5',6- (PCB 151) 52663-63-5 1668A mg/L
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,5'- (PCB 153) 35065-27-1 1668A mg/L
PCB 153/168 E52450822 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/L
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 1668A mg/L
PCB 156/157 E52450830 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5,6- (PCB 163) 74472-44-9 1668A mg/L
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/L
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/L
Hexachlorobiphenyl, 2,3,4,4',5,6- (PCB 166) 41411-63-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/L
Hexachlorobiphenyl, 2,3',4,4',5',6- (PCB 168) 59291-65-5 1668A mg/L
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,4',6- (PCB 171) 52663-71-5 1668A mg/L
PCB 171/173 E52450848 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5,6- (PCB 173) 68194-16-1 1668A mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000155 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
83 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/L
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,5'- (PCB 180) 35065-29-3 1668A mg/L
PCB 180/193 E52450855 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',5',6- (PCB 183) 52663-69-1 1668A mg/L
PCB 183/185 E52450863 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,5',6- (PCB 185) 52712-05-7 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/L
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/L
Heptachlorobiphenyl, 2,3,3',4',5,5',6- (PCB 193) 69782-91-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,4',6,6'- (PCB 197) 33091-17-7 1668A mg/L
PCB 197/200 E52450871 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,5',6- (PCB 198) 68194-17-2 1668A mg/L
PCB 198/199 E52450889 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4',5,5',6'- (PCB 199) 52663-75-9 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5,6,6'- (PCB 200) 52663-73-7 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/L
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/L
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/L
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/L
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/L
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/L
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/L
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/L
Pesticides
Aldrin 309-00-2 EPA 608.3 mg/L
alpha BHC (Alpha Hexachlorocyclohexane) 319-84-6 EPA 608.3 mg/L
Alpha Endosulfan 959-98-8 EPA 608.3 mg/L
beta BHC (Beta Hexachlorocyclohexane) 319-85-7 EPA 608.3 mg/L
Beta Endosulfan 33213-65-9 EPA 608.3 mg/L
Chlordane 57-74-9 EPA 608.3 mg/L
delta BHC (Delta Hexachlorocyclohexane) 319-86-8 EPA 608.3 mg/L
Dieldrin 60-57-1 EPA 608.3 mg/L
Endosulfan sulfate 1031-07-8 EPA 608.3 mg/L
Endrin 72-20-8 EPA 608.3 mg/L
Endrin Aldehyde 7421-93-4 EPA 608.3 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000104 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --0.000000526 -- -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- --<0.000000518 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000155 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00000155 U -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --<0.000000777 U -- -- -- -- -- -- -- --
-- --0.000002209 -- -- -- -- -- -- -- -- --
-- --0.000056534 -- -- -- -- -- -- -- -- --
-- --0.000110859 -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
84 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
gamma BHC (Lindane) 58-89-9 EPA 608.3 mg/L
Heptachlor 76-44-8 EPA 608.3 mg/L
Heptachlor Epoxide 1024-57-3 EPA 608.3 mg/L
P,P'-DDD 72-54-8 EPA 608.3 mg/L
P,P'-DDE 72-55-9 EPA 608.3 mg/L
P,P'-DDT 50-29-3 EPA 608.3 mg/L
Toxaphene 8001-35-2 EPA 608.3 mg/L
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270 mg/L
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/L
1,2-Dichlorobenzene 95-50-1 EPA 625.1 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/L
1,2-Diphenylhydrazine 122-66-7 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 625.1 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 625.1 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 625.1 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/L
2-Chloronaphthalene 91-58-7 EPA 625.1 mg/L
2-Chloronaphthalene 91-58-7 EPA 8270 mg/L
2-Chlorophenol 95-57-8 EPA 625.1 mg/L
2-Chlorophenol 95-57-8 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 625.1 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270 mg/L
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/L
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/L
2-Nitroaniline 88-74-4 EPA 8270 mg/L
2-Nitrophenol 88-75-5 EPA 625.1 mg/L
2-Nitrophenol 88-75-5 EPA 8270 mg/L
2,4-Dichlorophenol 120-83-2 EPA 625.1 mg/L
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/L
2,4-Dimethylphenol 105-67-9 EPA 625.1 mg/L
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/L
2,4-Dinitrophenol 51-28-5 EPA 625.1 mg/L
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 625.1 mg/L
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/L
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 625.1 mg/L
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 625.1 mg/L
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/L
3- & 4-Methylphenol edms_0009 EPA 625.1 mg/L
3- & 4-Methylphenol edms_0009 EPA 8270 mg/L
3-Nitroaniline 99-09-2 EPA 8270 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 625.1 mg/L
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 625.1 mg/L
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 625.1 mg/L
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/L
4-Chloroaniline 106-47-8 EPA 8270 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 625.1 mg/L
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.002 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- --<0.002 U -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
85 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
4-Nitroaniline 100-01-6 EPA 8270 mg/L
4-Nitrophenol 100-02-7 EPA 625.1 mg/L
4-Nitrophenol 100-02-7 EPA 8270 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 625.1 mg/L
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/L
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/L
Benzidine 92-87-5 EPA 625.1 mg/L
Benzoic acid 65-85-0 EPA 8270 mg/L
Benzyl Alcohol 100-51-6 EPA 8270 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 625.1 mg/L
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 625.1 mg/L
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 625.1 mg/L
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 625.1 mg/L
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 625.1 mg/L
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 625.1 mg/L
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/L
Di-N-Octylphthalate 117-84-0 EPA 625.1 mg/L
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/L
Dibenzofuran 132-64-9 EPA 8270 mg/L
Diethyl Phthalate 84-66-2 EPA 625.1 mg/L
Diethyl Phthalate 84-66-2 EPA 8270 mg/L
Dimethyl Phthalate 131-11-3 EPA 625.1 mg/L
Dimethyl Phthalate 131-11-3 EPA 8270 mg/L
Hexachlorobenzene 118-74-1 EPA 625.1 mg/L
Hexachlorobenzene 118-74-1 EPA 8270 mg/L
Hexachlorobutadiene 87-68-3 EPA 625.1 mg/L
Hexachlorobutadiene 87-68-3 EPA 8270 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 625.1 mg/L
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/L
Hexachloroethane 67-72-1 EPA 625.1 mg/L
Hexachloroethane 67-72-1 EPA 8270 mg/L
Isophorone 78-59-1 EPA 625.1 mg/L
Isophorone 78-59-1 EPA 8270 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 625.1 mg/L
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 625.1 mg/L
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 625.1 mg/L
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/L
Nitrobenzene 98-95-3 EPA 625.1 mg/L
Nitrobenzene 98-95-3 EPA 8270 mg/L
Pentachlorophenol 87-86-5 EPA 625.1 mg/L
Pentachlorophenol 87-86-5 EPA 8270 mg/L
Phenol 108-95-2 EPA 420.4 Rev 1.0 1993 mg/L
Phenol 108-95-2 EPA 625.1 mg/L
Phenol 108-95-2 EPA 8270 mg/L
VOCs
1,1-Dichloroethane 75-34-3 EPA 624 mg/L
1,1-Dichloroethane 75-34-3 EPA 8260 mg/L
1,1-Dichloroethene 75-35-4 EPA 624 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
86 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
1,1-Dichloroethene 75-35-4 EPA 8260 mg/L
1,1-Dichloropropene 563-58-6 EPA 8260 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 624 mg/L
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/L
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 624 mg/L
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 624 mg/L
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/L
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/L
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 624 mg/L
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/L
1,2-Dichloroethane 107-06-2 EPA 624 mg/L
1,2-Dichloroethane 107-06-2 EPA 8260 mg/L
1,2-dichloroethene (cis+trans) 540-59-0 EPA 8260 mg/L
1,2-Dichloropropane 78-87-5 EPA 624 mg/L
1,2-Dichloropropane 78-87-5 EPA 8260 mg/L
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/L
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 624 mg/L
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/L
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 624 mg/L
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/L
1,3-Dichloropropane 142-28-9 EPA 8260 mg/L
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 624 mg/L
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/L
2-Chloroethyl Vinyl Ether 110-75-8 EPA 624 mg/L
2-Chlorotoluene 95-49-8 EPA 8260 mg/L
2-Hexanone 591-78-6 EPA 8260 mg/L
2,2-Dichloropropane 594-20-7 EPA 8260 mg/L
4-Chlorotoluene 106-43-4 EPA 8260 mg/L
Acetone 67-64-1 EPA 8260 mg/L
Acrolein 107-02-8 EPA 624 mg/L
Acrylonitrile 107-13-1 EPA 624 mg/L
Benzene 71-43-2 EPA 624 mg/L
Benzene 71-43-2 EPA 8260 mg/L
Bromobenzene 108-86-1 EPA 8260 mg/L
Bromochloromethane 74-97-5 EPA 8260 mg/L
Bromodichloromethane 75-27-4 EPA 624 mg/L
Bromodichloromethane 75-27-4 EPA 8260 mg/L
Bromoform 75-25-2 EPA 624 mg/L
Bromoform 75-25-2 EPA 8260 mg/L
Bromomethane 74-83-9 EPA 624 mg/L
Bromomethane 74-83-9 EPA 8260 mg/L
Carbon Tetrachloride 56-23-5 EPA 624 mg/L
Carbon Tetrachloride 56-23-5 EPA 8260 mg/L
Chlorobenzene 108-90-7 EPA 624 mg/L
Chlorobenzene 108-90-7 EPA 8260 mg/L
Chloroethane 75-00-3 EPA 624 mg/L
Chloroethane 75-00-3 EPA 8260 mg/L
Chloroform 67-66-3 EPA 624 mg/L
Chloroform 67-66-3 EPA 8260 mg/L
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
87 of 88
Table A-1
Surface Water Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Chemical Name CAS-RN Method Units
Chloromethane 74-87-3 EPA 624 mg/L
Chloromethane 74-87-3 EPA 8260 mg/L
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 624 mg/L
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/L
Dibromochloromethane 124-48-1 EPA 624 mg/L
Dibromochloromethane 124-48-1 EPA 8260 mg/L
Dibromomethane 74-95-3 EPA 8260 mg/L
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/L
Ethylbenzene 100-41-4 EPA 624 mg/L
Ethylbenzene 100-41-4 EPA 8260 mg/L
Hexachlorobutadiene 87-68-3 EPA 8260 mg/L
Isopropyl Ether 108-20-3 EPA 8260 mg/L
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/L
M,P-Xylene 179601-23-1 EPA 8260 mg/L
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/L
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/L
Methylene Chloride 75-09-2 EPA 624 mg/L
Methylene Chloride 75-09-2 EPA 8260 mg/L
N-Butylbenzene 104-51-8 EPA 8260 mg/L
N-Propylbenzene 103-65-1 EPA 8260 mg/L
Naphthalene 91-20-3 EPA 8260 mg/L
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/L
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/L
Sec-Butylbenzene 135-98-8 EPA 8260 mg/L
Styrene 100-42-5 EPA 8260 mg/L
T-Butylbenzene 98-06-6 EPA 8260 mg/L
Tert-Butyl Alcohol 75-65-0 EPA 8260 mg/L
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/L
Tetrachloroethylene 127-18-4 EPA 624 mg/L
Tetrachloroethylene 127-18-4 EPA 8260 mg/L
Toluene 108-88-3 EPA 624 mg/L
Toluene 108-88-3 EPA 8260 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 624 mg/L
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 624 mg/L
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/L
Trichloroethylene 79-01-6 EPA 624 mg/L
Trichloroethylene 79-01-6 EPA 8260 mg/L
Trichlorofluoromethane 75-69-4 EPA 624 mg/L
Trichlorofluoromethane 75-69-4 EPA 8260 mg/L
Vinyl Acetate 108-05-4 EPA 8260 mg/L
Vinyl Chloride 75-01-4 EPA 624 mg/L
Vinyl Chloride 75-01-4 EPA 8260 mg/L
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
10439456
7/11/2018
--
ABL-SW014
Eastern Drainage Ditch
ABL-SW014-F010
680-188271
9/1/2020
12:20:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F009
680-186392
7/14/2020
15:00:00
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F005
92391628
7/11/2018
12:30:00
ABL-SWL01
Little Mountain Creek
ABLSWL01F001
180-6095-9
11/18/2011
--
ABL-SW015
Eastern Drainage Ditch
ABL-SW015-F010
680-188271
9/1/2020
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --<0.0008 U
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- --
88 of 88
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/kg) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
Moisture, Percent MOIST ASTM D2974-87 %--14.6 --12.7 --13.9 --36.5 --42.5 --60.5 -- -- --11.2 --
Cyanide 57-12-5 SM 4500-CN mg/kg --0.54 --0.17 J 0.13 --0.42 J 0.43 J 1.4 -- -- -- -- --
Fluoride 16984-48-8 EPA 9056 mg/kg --<14.8 U <14.2 U <14.4 U <20.1 U 144 --<31.7 U -- -- -- --
Arsenic 7440-38-2 EPA 6010 mg/kg 33 8.4 --14.9 --6.5 --10.4 --15.8 --12.4 -- -- -- -- --
Barium 7440-39-3 EPA 6010 mg/kg 60 33.1 --58.4 --89.3 --54.9 --187 --85.8 -- -- -- -- --
Cadmium 7440-43-9 EPA 6010 mg/kg 5 0.16 --0.23 --0.17 --0.18 --0.55 J 0.19 -- -- -- -- --
Chromium, total 7440-47-3 EPA 6010 mg/kg 111 66.7 --79.5 --108 --54.7 --29.3 --20.4 -- -- -- -- --
Lead 7439-92-1 EPA 6010 mg/kg 128 12.7 --20 --18.4 --24.4 --23.9 --21.7 -- -- -- -- --
Mercury 7439-97-6 EPA 7471 mg/kg 1.1 0.0087 --0.014 --0.01 --0.019 --0.016 --0.024 -- -- -- -- --
Selenium 7782-49-2 EPA 6010 mg/kg 2.9 <0.33 U <0.37 U <0.35 U <0.49 U <4.6 U <0.88 U -- -- -- --
Silver 7440-22-4 EPA 6010 mg/kg 2.2 0.42 --0.59 --0.49 --0.6 --<2.3 U <0.44 U -- -- -- --
Acenaphthene 83-32-9 EPA 8270 mg/kg 9.82 <0.089 U <0.0871 U <0.0882 U <0.12 U <0.132 U <0.193 U -- -- -- --
Acenaphthene 83-32-9 EPA 8270D by SIM mg/kg 9.82 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0017 U
Acenaphthylene 208-96-8 EPA 8270 mg/kg 9.04 <0.0914 U <0.0894 U <0.0905 U <0.123 U <0.136 U <0.198 U -- -- -- --
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/kg 9.04 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0015 U
Anthracene 120-12-7 EPA 8270 mg/kg 11.88 <0.0867 U <0.0848 U <0.0859 U <0.117 U <0.129 U <0.187 U -- -- -- --
Anthracene 120-12-7 EPA 8270D by SIM mg/kg 11.88 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0016 U
Benzo[a]anthracene 56-55-3 EPA 8270 mg/kg 16.82 <0.0715 U <0.0699 U <0.0708 U <0.0961 U 0.139 J 0.361 J -- -- -- --
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/kg 16.82 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0008 U
Benzo[a]pyrene 50-32-8 EPA 8270 mg/kg 19.3 <0.0738 U <0.0722 U <0.0731 U <0.0992 U 0.191 J 0.485 J -- -- -- --
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/kg 19.3 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0012 U
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/kg 19.58 <0.0668 U <0.0653 U <0.0662 U <0.0898 U 0.246 J 0.609 J -- -- -- --
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/kg 19.58 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00076 U
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/kg 21.8 <0.0984 U <0.0962 U <0.0975 U <0.132 U <0.146 U 0.325 J -- -- -- --
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/kg 21.8 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0029 U
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/kg 19.62 <0.0762 U <0.0745 U <0.0755 U <0.102 U <0.113 U 0.217 J -- -- -- --
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/kg 19.62 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0017 U
Chrysene 218-01-9 EPA 8270 mg/kg 16.88 <0.0516 U <0.0504 U <0.0511 U <0.0693 U 0.161 J 0.406 J -- -- -- --
Chrysene 218-01-9 EPA 8270D by SIM mg/kg 16.88 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.002 U
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/kg 22.4 <0.082 U <0.0802 U <0.0813 U <0.11 U <0.122 U <0.177 U -- -- -- --
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/kg 22.4 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.002 U
Fluoranthene 206-44-0 EPA 8270 mg/kg 14.14 <0.0562 U <0.055 U <0.0557 U <0.0756 U 0.201 J 0.632 J -- -- -- --
Fluoranthene 206-44-0 EPA 8270D by SIM mg/kg 14.14 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.00094 U
Fluorene 86-73-7 EPA 8270 mg/kg 10.76 <0.0797 U <0.0779 U <0.0789 U <0.107 U <0.118 U <0.172 U -- -- -- --
Fluorene 86-73-7 EPA 8270D by SIM mg/kg 10.76 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0018 U
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/kg 22.4 <0.0797 U <0.0779 U <0.0789 U <0.107 U <0.118 U 0.247 J -- -- -- --
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/kg 22.4 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0032 U
Naphthalene 91-20-3 EPA 8270 mg/kg 7.7 <0.0949 U <0.0928 U <0.094 U <0.128 U <0.141 U <0.205 U -- -- -- --
Naphthalene 91-20-3 EPA 8270D by SIM mg/kg 7.7 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0026 U
Phenanthrene 85-01-8 EPA 8270 mg/kg 11.92 <0.0644 U <0.063 U <0.0638 U <0.0866 U 0.0978 J 0.386 J -- -- -- --
Phenanthrene 85-01-8 EPA 8270D by SIM mg/kg 11.92 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0017 U
Pyrene 129-00-0 EPA 8270 mg/kg 13.94 <0.0656 U <0.0641 U <0.065 U <0.0882 U 0.199 J 0.553 J -- -- -- --
Pyrene 129-00-0 EPA 8270D by SIM mg/kg 13.94 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.002 U
Total HMW PAHs PAHs_highMW_ND=0 -- mg/kg --<0 U <0 U <0 U <0 U 0.936 --3.203 -- -- --<0 U
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/kg --<0.3328 U <0.32535 U <0.3297 U <0.4468 U 1.1855 --3.2915 -- -- --<0.00828 U
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/kg --<0.6656 U <0.6507 U <0.6594 U <0.8936 U 1.435 --3.38 -- -- --<0.01656 U
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/kg --<0 U <0 U <0 U <0 U 0.2988 --1.018 -- -- --<0 U
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/kg --<0.28115 U <0.275 U <0.2785 U <0.3786 U 0.6268 --1.4955 -- -- --<0.00592 U
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/kg --<0.5623 U <0.55 U <0.557 U <0.7572 U 0.9548 --1.973 -- -- --<0.01184 U
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/kg --<0.0176 U <0.0172 U <0.0174 U <0.0236 U <0.0261 U <0.038 U -- -- -- --
General Chemistry
PCB Aroclors
Inorganics
Metals
PAHs
--
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
92391723
7/12/2018
8:35:00
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
10439556
7/12/2018
13:15:00
Yes
Yes
ABL-SD006
Eastern Drainage Ditch
ABL-SD006-F004
92259990
7/21/2015
14:00:00
Yes
Yes
ABL-SD005
WC Wetland /WC Ditch
ABL-SD005-F004
92259990
7/21/2015
11:00:00
Yes
Yes
ABL-SD004
WB Wetland /SB Ditch
ABL-SD004-F004
92259990
7/21/2015
12:15:00
Yes
Yes
ABL-SD003Upgradient Little Mountain
CreekABL-SD003-F004
92259990
7/21/2015MethodChemical Name CAS-RN Units
9:00:00
Yes
Yes
ABL-SD002
Little Mountain Creek
ABL-SD002-F004
92259990
7/21/2015
9:55:00
Yes
Yes
ABL-SD001
Little Mountain Creek
ABL-SD001-F004
92259990
7/21/2015
1 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/kg) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
92391723
7/12/2018
8:35:00
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
10439556
7/12/2018
13:15:00
Yes
Yes
ABL-SD006
Eastern Drainage Ditch
ABL-SD006-F004
92259990
7/21/2015
14:00:00
Yes
Yes
ABL-SD005
WC Wetland /WC Ditch
ABL-SD005-F004
92259990
7/21/2015
11:00:00
Yes
Yes
ABL-SD004
WB Wetland /SB Ditch
ABL-SD004-F004
92259990
7/21/2015
12:15:00
Yes
Yes
ABL-SD003Upgradient Little Mountain
CreekABL-SD003-F004
92259990
7/21/2015MethodChemical Name CAS-RN Units
9:00:00
Yes
Yes
ABL-SD002
Little Mountain Creek
ABL-SD002-F004
92259990
7/21/2015
9:55:00
Yes
Yes
ABL-SD001
Little Mountain Creek
ABL-SD001-F004
92259990
7/21/2015
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/kg ---- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0172 U
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/kg --<0.0176 U <0.0172 U <0.0174 U <0.0236 U <0.0261 U <0.038 U -- -- -- --
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/kg ---- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0172 U
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/kg --<0.0176 U <0.0172 U <0.0174 U <0.0236 U <0.0261 U <0.038 U -- -- -- --
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/kg ---- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0172 U
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/kg --<0.0176 U <0.0172 U <0.0174 U <0.0236 U <0.0261 U <0.038 U -- -- -- --
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/kg ---- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0172 U
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/kg --<0.0176 U <0.0172 U <0.0174 U <0.0236 U <0.0261 U <0.038 U -- -- -- --
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/kg ---- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0172 U
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/kg --<0.0176 U <0.0172 U <0.0174 U <0.0236 U <0.0261 U <0.038 U -- -- -- --
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/kg ---- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0172 U
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/kg --<0.0176 U <0.0172 U <0.0174 U <0.0236 U <0.0261 U <0.038 U -- -- -- --
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/kg ---- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0172 U
Total PCBs (Aroclors) totPCB_ND=0 -- mg/kg 0.676 <0 U <0 U <0 U <0 U <0 U <0 U -- --<0 U
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/kg 0.676 <0.0616 U <0.0602 U <0.0609 U <0.0826 U <0.09135 U <0.133 U -- --<0.0602 U
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/kg 0.676 <0.1232 U <0.1204 U <0.1218 U <0.1652 U <0.1827 U <0.266 U -- --<0.1204 U
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000238 U -- --
PCB 12/13 E52450566 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000032 U -- --
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
PCB 18/30 E52450574 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
PCB 20/28 E52450582 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000165 -- -- --
PCB 21/33 E52450590 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000131 U -- --
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000922 U -- --
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
PCB 26/29 E52450608 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.00018 -- -- --
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.0000257 -- -- --
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.0000818 -- -- --
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000243 U -- --
PCB 40/41/71 E52450616 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000146 U -- --
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.0000666 -- -- --
PCB 43/73 (43/73) 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 44/47/65 E52450624 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000215 -- -- --
PCB Congeners
2 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/kg) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
92391723
7/12/2018
8:35:00
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
10439556
7/12/2018
13:15:00
Yes
Yes
ABL-SD006
Eastern Drainage Ditch
ABL-SD006-F004
92259990
7/21/2015
14:00:00
Yes
Yes
ABL-SD005
WC Wetland /WC Ditch
ABL-SD005-F004
92259990
7/21/2015
11:00:00
Yes
Yes
ABL-SD004
WB Wetland /SB Ditch
ABL-SD004-F004
92259990
7/21/2015
12:15:00
Yes
Yes
ABL-SD003Upgradient Little Mountain
CreekABL-SD003-F004
92259990
7/21/2015MethodChemical Name CAS-RN Units
9:00:00
Yes
Yes
ABL-SD002
Little Mountain Creek
ABL-SD002-F004
92259990
7/21/2015
9:55:00
Yes
Yes
ABL-SD001
Little Mountain Creek
ABL-SD001-F004
92259990
7/21/2015
PCB 45/51 E52450632 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 49/69 E52450640 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000161 -- -- --
PCB 50/53 E52450657 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000249 -- -- --
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000226 -- -- --
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 59/62/75 E52450665 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000146 U -- --
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.00014 -- -- --
PCB 61/70/74/76 E52450673 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000886 -- -- --
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.00018 -- -- --
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000468 -- -- --
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000105 -- -- --
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.0000513 -- -- --
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 85/117/116 E52450699 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000146 U -- --
PCB 86/87/97/108/119/125 E52450707 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000291 U -- --
PCB 88/91 E52450715 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 90/101/113 E52450723 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000191 -- -- --
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 93/98/100/102 (93/98/100/102) 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000194 U -- --
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000106 -- -- --
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000129 -- -- --
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000232 -- -- --
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 107/124 E52450749 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 110/115 E52450756 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000335 -- -- --
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000354 -- -- --
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
3 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/kg) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
92391723
7/12/2018
8:35:00
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
10439556
7/12/2018
13:15:00
Yes
Yes
ABL-SD006
Eastern Drainage Ditch
ABL-SD006-F004
92259990
7/21/2015
14:00:00
Yes
Yes
ABL-SD005
WC Wetland /WC Ditch
ABL-SD005-F004
92259990
7/21/2015
11:00:00
Yes
Yes
ABL-SD004
WB Wetland /SB Ditch
ABL-SD004-F004
92259990
7/21/2015
12:15:00
Yes
Yes
ABL-SD003Upgradient Little Mountain
CreekABL-SD003-F004
92259990
7/21/2015MethodChemical Name CAS-RN Units
9:00:00
Yes
Yes
ABL-SD002
Little Mountain Creek
ABL-SD002-F004
92259990
7/21/2015
9:55:00
Yes
Yes
ABL-SD001
Little Mountain Creek
ABL-SD001-F004
92259990
7/21/2015
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 128/166 E52450764 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
PCB 129/138/163 (129/138/163) 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000249 -- -- --
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.0000556 -- -- --
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 134/143 E52450780 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
PCB 135/151 (135/151) 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 139/140 E52450806 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 147/149 E52450814 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000161 -- -- --
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 153/168 E52450822 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000196 -- -- --
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 156/157 E52450830 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.0000649 -- -- --
PCB 171/173 E52450848 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.0000822 -- -- --
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 180/193 E52450855 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000165 -- -- --
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
PCB 183/185 E52450863 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000971 U -- --
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --0.000101 -- -- --
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
4 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/kg) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
92391723
7/12/2018
8:35:00
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
10439556
7/12/2018
13:15:00
Yes
Yes
ABL-SD006
Eastern Drainage Ditch
ABL-SD006-F004
92259990
7/21/2015
14:00:00
Yes
Yes
ABL-SD005
WC Wetland /WC Ditch
ABL-SD005-F004
92259990
7/21/2015
11:00:00
Yes
Yes
ABL-SD004
WB Wetland /SB Ditch
ABL-SD004-F004
92259990
7/21/2015
12:15:00
Yes
Yes
ABL-SD003Upgradient Little Mountain
CreekABL-SD003-F004
92259990
7/21/2015MethodChemical Name CAS-RN Units
9:00:00
Yes
Yes
ABL-SD002
Little Mountain Creek
ABL-SD002-F004
92259990
7/21/2015
9:55:00
Yes
Yes
ABL-SD001
Little Mountain Creek
ABL-SD001-F004
92259990
7/21/2015
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000485 U -- --
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
PCB 197/200 E52450871 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000146 U -- --
PCB 198/199 E52450889 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.000146 U -- --
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/kg ---- -- -- -- -- -- -- -- -- -- -- --<0.0000728 U -- --
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/kg 0.676 -- -- -- -- -- -- -- -- -- -- -- --0.0056221 -- -- --
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/kg 0.676 -- -- -- -- -- -- -- -- -- -- -- --0.00959375 -- -- --
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/kg 0.676 -- -- -- -- -- -- -- -- -- -- -- --0.0135654 -- -- --
1-Methylnaphthalene 90-12-0 EPA 8270 mg/kg 8.92 <0.101 U <0.0985 U <0.0998 U <0.135 U <0.15 U <0.218 U -- -- -- --
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/kg 8.92 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0014 U
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/kg 0.954 <0.103 U <0.101 U <0.102 U <0.139 U <0.153 U <0.223 U -- -- -- --
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/kg 0.97 <0.075 U <0.0733 U <0.0743 U <0.101 U <0.111 U <0.162 U -- -- -- --
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/kg 0.936 <0.0879 U <0.0859 U <0.0871 U <0.118 U <0.131 U <0.19 U -- -- -- --
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/kg 0.936 <0.109 U <0.107 U <0.108 U <0.146 U <0.162 U <0.236 U -- -- -- --
2-Chloronaphthalene 91-58-7 EPA 8270 mg/kg --<0.0762 U <0.0745 U <0.0755 U <0.102 U <0.113 U <0.165 U -- -- -- --
2-Chlorophenol 95-57-8 EPA 8270 mg/kg 0.55 <0.105 U <0.103 U <0.104 U <0.142 U <0.157 U <0.228 U -- -- -- --
2-Methylnaphthalene 91-57-6 EPA 8270 mg/kg 8.94 <0.0832 U <0.0813 U <0.0824 U <0.112 U <0.124 U <0.18 U -- -- -- --
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/kg 8.94 -- -- -- -- -- -- -- -- -- -- -- -- -- --<0.0012 U
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/kg 3.546 <0.117 U <0.115 U <0.116 U <0.158 U <0.174 U <0.253 U -- -- -- --
2-Nitroaniline 88-74-4 EPA 8270 mg/kg --<0.12 U <0.117 U <0.118 U <0.161 U <0.178 U <0.258 U -- -- -- --
2-Nitrophenol 88-75-5 EPA 8270 mg/kg 7.178 <0.0937 U <0.0916 U <0.0929 U <0.126 U <0.139 U <0.203 U -- -- -- --
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/kg 3.772 <0.0844 U <0.0825 U <0.0836 U <0.113 U <0.125 U <0.182 U -- -- -- --
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/kg 2.874 <0.152 U <0.149 U <0.151 U <0.205 U <0.226 U <0.329 U -- -- -- --
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/kg 5.922 <0.0633 U <0.0619 U <0.0627 U <0.0851 U <0.094 U <0.137 U -- -- -- --
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/kg 2.9 <0.0726 U <0.071 U <0.072 U <0.0977 U <0.108 U <0.157 U -- -- -- --
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/kg 3.928 <0.12 U <0.117 U <0.118 U <0.161 U <0.178 U <0.258 U -- -- -- --
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/kg 3.928 <0.0855 U <0.0836 U <0.0847 U <0.115 U <0.127 U <0.185 U -- -- -- --
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/kg 0.262 <0.0808 U <0.079 U <0.0801 U <0.109 U <0.12 U <0.175 U -- -- -- --
3- & 4-Methylphenol edms_0009 EPA 8270 mg/kg --<0.152 U <0.149 U <0.151 U <0.205 U <0.226 U <0.329 U -- -- -- --
3-Nitroaniline 99-09-2 EPA 8270 mg/kg --<0.105 U <0.103 U <0.104 U <0.142 U <0.157 U <0.228 U -- -- -- --
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/kg 0.18 <0.0844 U <0.0825 U <0.0836 U <0.113 U <0.125 U <0.182 U -- -- -- --
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/kg 0.124 <0.0703 U <0.0687 U <0.0696 U <0.0945 U <0.104 U <0.152 U -- -- -- --
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/kg 4.07 <0.0797 U <0.0779 U <0.0789 U <0.107 U <0.118 U <0.172 U -- -- -- --
4-Chloroaniline 106-47-8 EPA 8270 mg/kg 0.042 <0.108 U <0.105 U <0.107 U <0.145 U <0.16 U <0.233 U -- -- -- --
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/kg --<0.0797 U <0.0779 U <0.0789 U <0.107 U <0.118 U <0.172 U -- -- -- --
4-Nitroaniline 100-01-6 EPA 8270 mg/kg --<0.109 U <0.107 U <0.108 U <0.146 U <0.162 U <0.236 U -- -- -- --
4-Nitrophenol 100-02-7 EPA 8270 mg/kg 8.21 <0.0691 U <0.0676 U <0.0685 U <0.0929 U <0.103 U <0.149 U -- -- -- --
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/kg 4.608 <0.0773 U <0.0756 U <0.0766 U <0.104 U <0.115 U <0.167 U -- -- -- --
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/kg 0.024 <0.104 U <0.102 U <0.103 U <0.14 U <0.155 U <0.225 U -- -- -- --
Benzoic acid 65-85-0 EPA 8270 mg/kg 4 <0.0703 U <0.0687 U <0.0696 U <0.0945 U 0.187 J <0.152 U -- -- -- --
Benzyl Alcohol 100-51-6 EPA 8270 mg/kg 13.458 <0.0773 U <0.0756 U <0.0766 U <0.104 U <0.115 U <0.167 U -- -- -- --
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/kg 0.962 <0.082 U <0.0802 U <0.0813 U <0.11 U <0.122 U <0.177 U -- -- -- --
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/kg --<0.0902 U <0.0882 U <0.0894 U <0.121 U <0.134 U <0.195 U -- -- -- --
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/kg 16.326 <0.0984 U <0.0962 U <0.0975 U <0.132 U <0.146 U <0.213 U -- -- -- --
SVOCs
5 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/kg) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
92391723
7/12/2018
8:35:00
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
10439556
7/12/2018
13:15:00
Yes
Yes
ABL-SD006
Eastern Drainage Ditch
ABL-SD006-F004
92259990
7/21/2015
14:00:00
Yes
Yes
ABL-SD005
WC Wetland /WC Ditch
ABL-SD005-F004
92259990
7/21/2015
11:00:00
Yes
Yes
ABL-SD004
WB Wetland /SB Ditch
ABL-SD004-F004
92259990
7/21/2015
12:15:00
Yes
Yes
ABL-SD003Upgradient Little Mountain
CreekABL-SD003-F004
92259990
7/21/2015MethodChemical Name CAS-RN Units
9:00:00
Yes
Yes
ABL-SD002
Little Mountain Creek
ABL-SD002-F004
92259990
7/21/2015
9:55:00
Yes
Yes
ABL-SD001
Little Mountain Creek
ABL-SD001-F004
92259990
7/21/2015
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/kg --<0.103 U <0.101 U <0.102 U <0.139 U <0.153 U <0.223 U -- -- -- --
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/kg 5.2 <0.105 U <0.103 U <0.104 U <0.142 U <0.157 U <0.228 U -- -- -- --
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/kg 0.638 <0.0633 U <0.0619 U <0.0627 U <0.0851 U <0.094 U <0.137 U -- -- -- --
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/kg 2.2 <0.0808 U <0.079 U <0.0801 U <0.109 U <0.12 U <0.175 U -- -- -- --
Dibenzofuran 132-64-9 EPA 8270 mg/kg 4.626 <0.0633 U <0.0619 U <0.0627 U <0.0851 U <0.094 U <0.137 U -- -- -- --
Diethyl Phthalate 84-66-2 EPA 8270 mg/kg 2.21 <0.0598 U <0.0584 U <0.0592 U <0.0803 U <0.0888 U <0.129 U -- -- -- --
Dimethyl Phthalate 131-11-3 EPA 8270 mg/kg 4.062 <0.0785 U <0.0767 U <0.0778 U <0.106 U <0.117 U <0.17 U -- -- -- --
Hexachlorobenzene 118-74-1 EPA 8270 mg/kg 0.48 <0.0492 U <0.0481 U <0.0488 U <0.0662 U <0.0731 U <0.106 U -- -- -- --
Hexachlorobutadiene 87-68-3 EPA 8270 mg/kg --<0.0668 U <0.0653 U <0.0662 U <0.0898 U <0.0992 U <0.144 U -- -- -- --
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/kg 0.81 <0.0715 U <0.0699 U <0.0708 U <0.0961 U <0.106 U <0.155 U -- -- -- --
Hexachloroethane 67-72-1 EPA 8270 mg/kg 0.15 <0.102 U <0.0997 U <0.101 U <0.137 U <0.151 U <0.22 U -- -- -- --
Isophorone 78-59-1 EPA 8270 mg/kg 1.896 <0.0867 U <0.0848 U <0.0859 U <0.117 U <0.129 U <0.187 U -- -- -- --
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/kg --<0.0738 U <0.0722 U <0.0731 U <0.0992 U <0.11 U <0.16 U -- -- -- --
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/kg --<0.125 U <0.123 U <0.124 U <0.169 U <0.186 U <0.271 U -- -- -- --
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/kg 0.74 <0.115 U <0.112 U <0.114 U <0.154 U <0.171 U <0.248 U -- -- -- --
Nitrobenzene 98-95-3 EPA 8270 mg/kg 18.014 <0.105 U <0.103 U <0.104 U <0.142 U <0.157 U <0.228 U -- -- -- --
Pentachlorophenol 87-86-5 EPA 8270 mg/kg 1.2 <0.0703 U <0.0687 U <0.0696 U <0.0945 U <0.104 U <0.152 U -- -- -- --
Phenol 108-95-2 EPA 8270 mg/kg 0.21 <0.116 U <0.113 U <0.115 U <0.156 U <0.172 U <0.251 U -- -- -- --
1,1-Dichloroethane 75-34-3 EPA 8260 mg/kg 3.332 <0.0014 U <0.0015 U <0.0019 U <0.0019 U <0.0028 U <0.0037 U -- -- -- --
1,1-Dichloroethene 75-35-4 EPA 8260 mg/kg 1.506 <0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
1,1-Dichloropropene 563-58-6 EPA 8260 mg/kg --<0.0014 U <0.0015 U <0.0019 U <0.0019 U <0.0028 U <0.0037 U -- -- -- --
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/kg 0.734 <0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/kg 0.836 <0.002 U <0.0022 U <0.0026 U <0.0027 U <0.004 U <0.0052 U -- -- -- --
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/kg 3.09 <0.002 U <0.0022 U <0.0026 U <0.0027 U <0.004 U <0.0052 U -- -- -- --
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/kg 4.46 <0.0018 U <0.0019 U <0.0024 U <0.0024 U <0.0036 U <0.0047 U -- -- -- --
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/kg --<0.0034 U <0.0037 U <0.0045 U <0.0046 U <0.0068 U <0.009 U -- -- -- --
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/kg --<0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/kg 0.954 <0.0018 U <0.0019 U <0.0024 U <0.0024 U <0.0036 U <0.0047 U -- -- -- --
1,2-Dichloroethane 107-06-2 EPA 8260 mg/kg 2.262 <0.0021 U <0.0023 U <0.0027 U <0.0028 U <0.0042 U <0.0055 U -- -- -- --
1,2-Dichloropropane 78-87-5 EPA 8260 mg/kg 1.752 <0.0016 U <0.0017 U <0.0021 U <0.0022 U <0.0032 U <0.0042 U -- -- -- --
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/kg 0.99 <0.0021 U <0.0023 U <0.0027 U <0.0028 U <0.0042 U <0.0055 U -- -- -- --
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/kg --<0.0015 U <0.0016 U <0.002 U <0.002 U <0.003 U <0.004 U -- -- -- --
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/kg 0.97 <0.0015 U <0.0016 U <0.002 U <0.002 U <0.003 U <0.004 U -- -- -- --
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/kg 0.722 <0.0019 U <0.002 U <0.0025 U <0.0025 U <0.0038 U <0.005 U -- -- -- --
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/kg 0.936 <0.0019 U <0.002 U <0.0025 U <0.0025 U <0.0038 U <0.005 U -- -- -- --
1,3-Dichloropropane 142-28-9 EPA 8260 mg/kg --<0.0018 U <0.0019 U <0.0024 U <0.0024 U <0.0036 U <0.0047 U -- -- -- --
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/kg 0.708 <0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/kg 0.936 <0.0016 U <0.0017 U <0.0021 U <0.0022 U <0.0032 U <0.0042 U -- -- -- --
2-Chlorotoluene 95-49-8 EPA 8260 mg/kg --<0.0016 U <0.0017 U <0.0021 U <0.0022 U <0.0032 U <0.0042 U -- -- -- --
2-Hexanone 591-78-6 EPA 8260 mg/kg 15.196 <0.0036 U <0.004 U <0.0048 U <0.005 U <0.0074 U <0.0097 U -- -- -- --
2,2-Dichloropropane 594-20-7 EPA 8260 mg/kg --<0.0016 U <0.0017 U <0.0021 U <0.0022 U <0.0032 U <0.0042 U -- -- -- --
4-Chlorotoluene 106-43-4 EPA 8260 mg/kg --<0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
Acetone 67-64-1 EPA 8260 mg/kg 76.266 <0.0093 U <0.0102 U <0.0124 U <0.0127 U <0.019 U <0.025 U -- -- -- --
Benzene 71-43-2 EPA 8260 mg/kg 4.37 <0.0015 U <0.0016 U <0.002 U <0.002 U <0.003 U <0.004 U -- -- -- --
Bromobenzene 108-86-1 EPA 8260 mg/kg --<0.0019 U <0.002 U <0.0025 U <0.0025 U <0.0038 U <0.005 U -- -- -- --
Bromochloromethane 74-97-5 EPA 8260 mg/kg --<0.0016 U <0.0017 U <0.0021 U <0.0022 U <0.0032 U <0.0042 U -- -- -- --
Bromodichloromethane 75-27-4 EPA 8260 mg/kg 0.42 <0.0018 U <0.0019 U <0.0024 U <0.0024 U <0.0036 U <0.0047 U -- -- -- --
Bromoform 75-25-2 EPA 8260 mg/kg 0.284 <0.0021 U <0.0024 U <0.0029 U <0.0029 U <0.0044 U <0.0057 U -- -- -- --
Bromomethane 74-83-9 EPA 8260 mg/kg 0.013 <0.0023 U <0.0026 U <0.0031 U <0.0032 U <0.0047 U <0.0062 U -- -- -- --
Carbon Tetrachloride 56-23-5 EPA 8260 mg/kg 1.412 <0.0024 U <0.0027 U <0.0032 U <0.0033 U <0.0049 U <0.0065 U -- -- -- --
Chlorobenzene 108-90-7 EPA 8260 mg/kg 1.878 <0.0018 U <0.0019 U <0.0024 U <0.0024 U <0.0036 U <0.0047 U -- -- -- --
Chloroethane 75-00-3 EPA 8260 mg/kg --<0.0022 U <0.0025 U <0.003 U <0.0031 U <0.0046 U <0.006 U -- -- -- --
Chloroform 67-66-3 EPA 8260 mg/kg 6.704 <0.0015 U <0.0016 U <0.002 U <0.002 U <0.003 U <0.004 U -- -- -- --
Chloromethane 74-87-3 EPA 8260 mg/kg --<0.0022 U <0.0025 U <0.003 U <0.0031 U <0.0046 U <0.006 U -- -- -- --
VOCs
6 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/kg) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
92391723
7/12/2018
8:35:00
Yes
Yes
ABL-SD007
Little Mountain Creek
ABL-SD007-F005
10439556
7/12/2018
13:15:00
Yes
Yes
ABL-SD006
Eastern Drainage Ditch
ABL-SD006-F004
92259990
7/21/2015
14:00:00
Yes
Yes
ABL-SD005
WC Wetland /WC Ditch
ABL-SD005-F004
92259990
7/21/2015
11:00:00
Yes
Yes
ABL-SD004
WB Wetland /SB Ditch
ABL-SD004-F004
92259990
7/21/2015
12:15:00
Yes
Yes
ABL-SD003Upgradient Little Mountain
CreekABL-SD003-F004
92259990
7/21/2015MethodChemical Name CAS-RN Units
9:00:00
Yes
Yes
ABL-SD002
Little Mountain Creek
ABL-SD002-F004
92259990
7/21/2015
9:55:00
Yes
Yes
ABL-SD001
Little Mountain Creek
ABL-SD001-F004
92259990
7/21/2015
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/kg 2.27 <0.0013 U <0.0014 U <0.0017 U <0.0018 U <0.0027 U <0.0035 U -- -- -- --
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/kg --<0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
Dibromochloromethane 124-48-1 EPA 8260 mg/kg 0.396 <0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
Dibromomethane 74-95-3 EPA 8260 mg/kg --<0.0023 U <0.0026 U <0.0031 U <0.0032 U <0.0047 U <0.0062 U -- -- -- --
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/kg --<0.0034 U <0.0037 U <0.0045 U <0.0046 U <0.0068 U <0.009 U -- -- -- --
Ethylbenzene 100-41-4 EPA 8260 mg/kg 2.934 <0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
Hexachlorobutadiene 87-68-3 EPA 8260 mg/kg --<0.0019 U <0.002 U <0.0025 U <0.0025 U <0.0038 U <0.005 U -- -- -- --
Isopropyl Ether 108-20-3 EPA 8260 mg/kg --<0.0016 U <0.0017 U <0.0021 U <0.0022 U <0.0032 U <0.0042 U -- -- -- --
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/kg 1.426 <0.0018 U <0.0019 U <0.0024 U <0.0024 U <0.0036 U <0.0047 U -- -- -- --
M,P-Xylene 179601-23-1 EPA 8260 mg/kg --<0.0034 U <0.0037 U <0.0045 U <0.0046 U <0.0068 U <0.009 U -- -- -- --
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/kg 45.414 <0.0027 U <0.003 U <0.0036 U <0.0037 U <0.0055 U <0.0072 U -- -- -- --
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/kg 16.33 <0.0035 U <0.0038 U <0.0046 U <0.0047 U <0.007 U <0.0092 U -- -- -- --
Methylene Chloride 75-09-2 EPA 8260 mg/kg 4.808 <0.0028 U <0.0031 U <0.0037 U <0.0038 U 0.0099 J <0.0075 U -- -- -- --
N-Butylbenzene 104-51-8 EPA 8260 mg/kg --<0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
N-Propylbenzene 103-65-1 EPA 8260 mg/kg --<0.0016 U <0.0017 U <0.0021 U <0.0022 U <0.0032 U <0.0042 U -- -- -- --
Naphthalene 91-20-3 EPA 8260 mg/kg 7.7 <0.0011 U <0.0012 U <0.0015 U <0.0015 U <0.0023 U <0.003 U -- -- -- --
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/kg --<0.0018 U <0.0019 U <0.0024 U <0.0024 U <0.0036 U <0.0047 U -- -- -- --
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/kg 0.484 <0.0016 U <0.0017 U <0.0021 U <0.0022 U <0.0032 U <0.0042 U -- -- -- --
Sec-Butylbenzene 135-98-8 EPA 8260 mg/kg --<0.0015 U <0.0016 U <0.002 U <0.002 U <0.003 U <0.004 U -- -- -- --
Styrene 100-42-5 EPA 8260 mg/kg 3.242 <0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
T-Butylbenzene 98-06-6 EPA 8260 mg/kg --<0.0019 U <0.002 U <0.0025 U <0.0025 U <0.0038 U <0.005 U -- -- -- --
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/kg 8.866 <0.0014 U <0.0015 U <0.0019 U <0.0019 U <0.0028 U <0.0037 U -- -- -- --
Tetrachloroethylene 127-18-4 EPA 8260 mg/kg 0.83 <0.0016 U <0.0017 U <0.0021 U <0.0022 U <0.0032 U <0.0042 U -- -- -- --
Toluene 108-88-3 EPA 8260 mg/kg 4.148 <0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/kg 2.27 <0.0018 U <0.0019 U <0.0024 U <0.0024 U <0.0036 U <0.0047 U -- -- -- --
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/kg --<0.0014 U <0.0015 U <0.0019 U <0.0019 U <0.0028 U <0.0037 U -- -- -- --
Trichloroethylene 79-01-6 EPA 8260 mg/kg 1.384 <0.002 U <0.0022 U <0.0026 U <0.0027 U <0.004 U <0.0052 U -- -- -- --
Trichlorofluoromethane 75-69-4 EPA 8260 mg/kg --<0.0021 U <0.0023 U <0.0027 U <0.0028 U <0.0042 U <0.0055 U -- -- -- --
Vinyl Acetate 108-05-4 EPA 8260 mg/kg 4.46 <0.0082 U <0.009 U <0.0109 U <0.0112 U <0.0167 U <0.022 U -- -- -- --
Vinyl Chloride 75-01-4 EPA 8260 mg/kg 2.356 <0.0017 U <0.0018 U <0.0022 U <0.0023 U <0.0034 U <0.0045 U -- -- -- --
Xylenes 1330-20-7 EPA 8260 mg/kg 2.148 <0.0034 U <0.0037 U <0.0045 U <0.0046 U <0.0068 U <0.009 U -- -- -- --
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
7 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Moisture, Percent MOIST ASTM D2974-87 %
Cyanide 57-12-5 SM 4500-CN mg/kg
Fluoride 16984-48-8 EPA 9056 mg/kg
Arsenic 7440-38-2 EPA 6010 mg/kg
Barium 7440-39-3 EPA 6010 mg/kg
Cadmium 7440-43-9 EPA 6010 mg/kg
Chromium, total 7440-47-3 EPA 6010 mg/kg
Lead 7439-92-1 EPA 6010 mg/kg
Mercury 7439-97-6 EPA 7471 mg/kg
Selenium 7782-49-2 EPA 6010 mg/kg
Silver 7440-22-4 EPA 6010 mg/kg
Acenaphthene 83-32-9 EPA 8270 mg/kg
Acenaphthene 83-32-9 EPA 8270D by SIM mg/kg
Acenaphthylene 208-96-8 EPA 8270 mg/kg
Acenaphthylene 208-96-8 EPA 8270D by SIM mg/kg
Anthracene 120-12-7 EPA 8270 mg/kg
Anthracene 120-12-7 EPA 8270D by SIM mg/kg
Benzo[a]anthracene 56-55-3 EPA 8270 mg/kg
Benzo[a]anthracene 56-55-3 EPA 8270D by SIM mg/kg
Benzo[a]pyrene 50-32-8 EPA 8270 mg/kg
Benzo[a]pyrene 50-32-8 EPA 8270D by SIM mg/kg
Benzo[b]fluoranthene 205-99-2 EPA 8270 mg/kg
Benzo[b]fluoranthene 205-99-2 EPA 8270D by SIM mg/kg
Benzo[g,h,i]perylene 191-24-2 EPA 8270 mg/kg
Benzo[g,h,i]perylene 191-24-2 EPA 8270D by SIM mg/kg
Benzo[k]fluoranthene 207-08-9 EPA 8270 mg/kg
Benzo[k]fluoranthene 207-08-9 EPA 8270D by SIM mg/kg
Chrysene 218-01-9 EPA 8270 mg/kg
Chrysene 218-01-9 EPA 8270D by SIM mg/kg
Dibenz(A,H)Anthracene 53-70-3 EPA 8270 mg/kg
Dibenz(A,H)Anthracene 53-70-3 EPA 8270D by SIM mg/kg
Fluoranthene 206-44-0 EPA 8270 mg/kg
Fluoranthene 206-44-0 EPA 8270D by SIM mg/kg
Fluorene 86-73-7 EPA 8270 mg/kg
Fluorene 86-73-7 EPA 8270D by SIM mg/kg
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270 mg/kg
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270D by SIM mg/kg
Naphthalene 91-20-3 EPA 8270 mg/kg
Naphthalene 91-20-3 EPA 8270D by SIM mg/kg
Phenanthrene 85-01-8 EPA 8270 mg/kg
Phenanthrene 85-01-8 EPA 8270D by SIM mg/kg
Pyrene 129-00-0 EPA 8270 mg/kg
Pyrene 129-00-0 EPA 8270D by SIM mg/kg
Total HMW PAHs PAHs_highMW_ND=0 -- mg/kg
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/kg
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/kg
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/kg
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/kg
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/kg
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082 mg/kg
General Chemistry
PCB Aroclors
Inorganics
Metals
PAHs
MethodChemical Name CAS-RN Units
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
-- --22.6 -- -- --32.8 -- -- --42.4 -- -- --31.2 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.002 U -- --0.0035 J -- --0.0262 -- -- --<0.0022 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0017 U -- --<0.0019 U -- --<0.0023 U -- --<0.0019 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0018 U -- --0.0074 J -- --0.0563 -- -- --0.0036 J
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00093 U -- --0.04 -- -- --0.287 -- -- --0.0171 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0014 U -- --0.0456 -- -- --0.319 -- -- --0.0191 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.00088 U -- --0.0419 -- -- --0.286 -- -- --0.0176 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0034 U -- --0.023 -- -- --0.146 -- -- --0.01 J
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.002 U -- --0.0158 -- -- --0.109 -- -- --0.008 J
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0024 U -- --0.0372 -- -- --0.254 -- -- --0.0162 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0024 U -- --<0.0027 U -- --0.0131 J -- --<0.0026 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0011 U -- --0.0539 -- -- --0.381 -- -- --0.0232 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0021 U -- --0.0028 J -- --0.0215 -- -- --<0.0023 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0037 U -- --0.0217 -- -- --0.137 -- -- --0.0093 J
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.003 U -- --<0.0034 U -- --0.0059 J -- --<0.0033 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.002 U -- --0.0295 -- -- --0.235 -- -- --0.014 J
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0024 U -- --0.0445 -- -- --0.307 -- -- --0.0181 --
-- --<0 U -- --0.2697 -- -- --1.8581 -- -- --0.1154 --
-- --<0.009755 U -- --0.27105 -- -- --1.8581 -- -- --0.1167 --
-- --<0.01951 U -- --0.2724 -- -- --1.8581 -- -- --0.118 --
-- --<0 U -- --0.0971 -- -- --0.7259 -- -- --0.0408 --
-- --<0.00685 U -- --0.09975 -- -- --0.72705 -- -- --0.04565 --
-- --<0.0137 U -- --0.1024 -- -- --0.7282 -- -- --0.0505 --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
--
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
92391723
7/12/2018
10:10:00
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
10439556
7/12/2018
8 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
MethodChemical Name CAS-RN Units
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/kg
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082 mg/kg
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/kg
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082 mg/kg
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/kg
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082 mg/kg
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/kg
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082 mg/kg
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/kg
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082 mg/kg
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/kg
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082 mg/kg
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/kg
Total PCBs (Aroclors) totPCB_ND=0 -- mg/kg
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/kg
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/kg
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 1668A mg/kg
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 1668A mg/kg
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 1668A mg/kg
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 1668A mg/kg
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 1668A mg/kg
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 1668A mg/kg
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 1668A mg/kg
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 1668A mg/kg
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 1668A mg/kg
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 1668A mg/kg
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 1668A mg/kg
PCB 12/13 E52450566 1668A mg/kg
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 1668A mg/kg
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 1668A mg/kg
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 1668A mg/kg
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 1668A mg/kg
PCB 18/30 E52450574 1668A mg/kg
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 1668A mg/kg
PCB 20/28 E52450582 1668A mg/kg
PCB 21/33 E52450590 1668A mg/kg
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 1668A mg/kg
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 1668A mg/kg
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 1668A mg/kg
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 1668A mg/kg
PCB 26/29 E52450608 1668A mg/kg
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 1668A mg/kg
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 1668A mg/kg
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 1668A mg/kg
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 1668A mg/kg
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 1668A mg/kg
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 1668A mg/kg
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 1668A mg/kg
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 1668A mg/kg
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 1668A mg/kg
PCB 40/41/71 E52450616 1668A mg/kg
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 1668A mg/kg
PCB 43/73 (43/73) 1668A mg/kg
PCB 44/47/65 E52450624 1668A mg/kg
PCB Congeners
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
92391723
7/12/2018
10:10:00
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
10439556
7/12/2018
-- --<0.0191 U -- --<0.0218 U -- --<0.0265 U -- --<0.0218 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0191 U -- --<0.0218 U -- --<0.0265 U -- --<0.0218 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0191 U -- --<0.0218 U -- --<0.0265 U -- --<0.0218 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0191 U -- --<0.0218 U -- --<0.0265 U -- --<0.0218 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0191 U -- --<0.0218 U -- --<0.0265 U -- --<0.0218 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0191 U -- --<0.0218 U -- --<0.0265 U -- --<0.0218 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0191 U -- --<0.0218 U -- --<0.0265 U -- --<0.0218 U
-- --<0 U -- --<0 U -- --<0 U -- --<0 U
-- --<0.06685 U -- --<0.0763 U -- --<0.09275 U -- --<0.0763 U
-- --<0.1337 U -- --<0.1526 U -- --<0.1855 U -- --<0.1526 U
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --0.0000668 -- -- --0.000159 -- -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --0.000033 -- -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --0.000108 -- -- --0.000316 -- -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.000238 U -- --<0.000245 U -- --<0.000245 U -- --<0.000245 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000321 U -- --0.0000652 -- -- --0.000101 -- -- --<0.000033 U -- --
<0.0000243 U -- --<0.000025 U -- --0.000165 -- -- --<0.000025 U -- --
<0.0000243 U -- --0.000102 -- -- --0.000289 -- -- --<0.000025 U -- --
<0.0000486 U -- --<0.00005 U -- --0.000179 -- -- --<0.00005 U -- --
<0.0000243 U -- --<0.000025 U -- --0.000105 -- -- --<0.000025 U -- --
<0.000125 U -- --0.000535 -- -- --0.00148 -- -- --<0.000129 U -- --
<0.000131 U -- --<0.000135 U -- --0.00052 -- -- --<0.000135 U -- --
<0.0000923 U -- --<0.000095 U -- --0.000369 -- -- --<0.000095 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --0.0000421 -- -- --<0.000025 U -- --
<0.0000486 U -- --<0.00005 U -- --0.000123 -- -- --<0.00005 U -- --
<0.0000243 U -- --<0.000025 U -- --0.0000423 -- -- --<0.000025 U -- --
<0.000126 U -- --0.000354 -- -- --0.00132 -- -- --<0.00013 U -- --
<0.0000243 U -- --0.0000817 -- -- --0.000278 -- -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000515 U -- --0.00011 -- -- --0.00049 -- -- --<0.000053 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.0000243 U -- --<0.000025 U -- --<0.000025 U -- --<0.000025 U -- --
<0.000146 U -- --0.000334 -- -- --0.00124 -- -- --<0.00015 U -- --
<0.0000486 U -- --0.00018 -- -- --0.000733 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.0000749 -- -- --<0.00005 U -- --
<0.000146 U -- --0.000715 -- -- --0.00244 -- -- --<0.00015 U -- --
9 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
MethodChemical Name CAS-RN Units
PCB 45/51 E52450632 1668A mg/kg
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 1668A mg/kg
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 1668A mg/kg
PCB 49/69 E52450640 1668A mg/kg
PCB 50/53 E52450657 1668A mg/kg
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 1668A mg/kg
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 1668A mg/kg
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 1668A mg/kg
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 1668A mg/kg
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 1668A mg/kg
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 1668A mg/kg
PCB 59/62/75 E52450665 1668A mg/kg
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 1668A mg/kg
PCB 61/70/74/76 E52450673 1668A mg/kg
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 1668A mg/kg
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 1668A mg/kg
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 1668A mg/kg
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 1668A mg/kg
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 1668A mg/kg
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 1668A mg/kg
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 1668A mg/kg
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1668A mg/kg
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 1668A mg/kg
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 1668A mg/kg
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 1668A mg/kg
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1668A mg/kg
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 1668A mg/kg
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 1668A mg/kg
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 1668A mg/kg
PCB 85/117/116 E52450699 1668A mg/kg
PCB 86/87/97/108/119/125 E52450707 1668A mg/kg
PCB 88/91 E52450715 1668A mg/kg
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 1668A mg/kg
PCB 90/101/113 E52450723 1668A mg/kg
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 1668A mg/kg
PCB 93/98/100/102 (93/98/100/102) 1668A mg/kg
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 1668A mg/kg
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 1668A mg/kg
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 1668A mg/kg
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 1668A mg/kg
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 1668A mg/kg
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 1668A mg/kg
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1668A mg/kg
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 1668A mg/kg
PCB 107/124 E52450749 1668A mg/kg
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 1668A mg/kg
PCB 110/115 E52450756 1668A mg/kg
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 1668A mg/kg
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 1668A mg/kg
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 1668A mg/kg
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1668A mg/kg
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 1668A mg/kg
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 1668A mg/kg
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 1668A mg/kg
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1668A mg/kg
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
92391723
7/12/2018
10:10:00
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
10439556
7/12/2018
<0.0000971 U -- --0.000111 -- -- --0.000387 -- -- --<0.0001 U -- --
<0.0000486 U -- --<0.00005 U -- --0.000118 -- -- --<0.00005 U -- --
<0.0000486 U -- --0.000122 -- -- --0.000458 -- -- --<0.00005 U -- --
<0.0000971 U -- --0.000574 -- -- --0.00176 -- -- --<0.0001 U -- --
<0.0000971 U -- --0.000114 -- -- --0.000361 -- -- --<0.0001 U -- --
<0.00015 U -- --0.000821 -- -- --0.00277 -- -- --<0.000154 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --0.000379 -- -- --0.00158 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.000146 U -- --<0.00015 U -- --0.000207 -- -- --<0.00015 U -- --
<0.0000486 U -- --0.000177 -- -- --0.000979 -- -- --<0.00005 U -- --
<0.000194 U -- --0.00156 -- -- --0.00605 -- -- --<0.0002 U -- --
<0.0000486 U -- --0.0000516 -- -- --0.000172 -- -- --<0.00005 U -- --
<0.0000486 U -- --0.000426 -- -- --0.00146 -- -- --<0.00005 U -- --
<0.0000816 U -- --0.00104 -- -- --0.00387 -- -- --<0.000084 U -- --
<0.0000486 U -- --<0.00005 U -- --0.0000634 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --0.000097 -- -- --0.000534 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --0.000104 -- -- --0.000797 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.000377 -- -- --<0.00005 U -- --
<0.0000486 U -- --0.000145 -- -- --0.000709 -- -- --<0.00005 U -- --
<0.000146 U -- --0.000264 -- -- --0.00157 -- -- --<0.00015 U -- --
<0.000291 U -- --0.000439 -- -- --0.00348 -- -- --<0.0003 U -- --
<0.0000971 U -- --0.00014 -- -- --0.000612 -- -- --<0.0001 U -- --
<0.0000486 U -- --<0.00005 U -- --0.0000882 -- -- --<0.00005 U -- --
<0.000146 U -- --0.000601 -- -- --0.00615 -- -- --<0.00015 U -- --
<0.0000486 U -- --0.000123 -- -- --0.000884 -- -- --<0.00005 U -- --
<0.000194 U -- --<0.0002 U -- --0.000239 -- -- --<0.0002 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000923 U -- --0.000378 -- -- --0.00231 -- -- --<0.000095 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --0.000495 -- -- --0.00288 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --0.000408 -- -- --0.0044 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000971 U -- --<0.0001 U -- --0.000305 -- -- --<0.0001 U -- --
<0.0000486 U -- --0.0000608 -- -- --0.000545 -- -- --<0.00005 U -- --
<0.0000971 U -- --0.000768 -- -- --0.00529 -- -- --<0.0001 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.000388 -- -- --<0.00005 U -- --
<0.0000622 U -- --0.000681 -- -- --0.0081 -- -- --<0.000064 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.000162 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.000297 -- -- --<0.00005 U -- --
10 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
MethodChemical Name CAS-RN Units
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1668A mg/kg
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 1668A mg/kg
PCB 128/166 E52450764 1668A mg/kg
PCB 129/138/163 (129/138/163) 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 1668A mg/kg
PCB 134/143 E52450780 1668A mg/kg
PCB 135/151 (135/151) 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 1668A mg/kg
PCB 139/140 E52450806 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 1668A mg/kg
PCB 147/149 E52450814 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 1668A mg/kg
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 1668A mg/kg
PCB 153/168 E52450822 1668A mg/kg
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 1668A mg/kg
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 1668A mg/kg
PCB 156/157 E52450830 1668A mg/kg
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 1668A mg/kg
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 1668A mg/kg
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 1668A mg/kg
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 1668A mg/kg
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 1668A mg/kg
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 1668A mg/kg
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 1668A mg/kg
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1668A mg/kg
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 1668A mg/kg
PCB 171/173 E52450848 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 1668A mg/kg
PCB 180/193 E52450855 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 1668A mg/kg
PCB 183/185 E52450863 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 1668A mg/kg
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 1668A mg/kg
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1668A mg/kg
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 1668A mg/kg
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 1668A mg/kg
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
92391723
7/12/2018
10:10:00
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
10439556
7/12/2018
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000971 U -- --<0.0001 U -- --0.00432 -- -- --<0.0001 U -- --
<0.000146 U -- --0.000497 -- -- --0.0495 -- -- --0.000214 -- -- --
<0.0000486 U -- --<0.00005 U -- --0.0012 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00021 -- -- --<0.00005 U -- --
<0.0000486 U -- --0.000114 -- -- --0.0085 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00045 -- -- --<0.00005 U -- --
<0.0000971 U -- --<0.0001 U -- --0.00117 -- -- --<0.0001 U -- --
<0.0000971 U -- --0.000147 -- -- --0.0153 -- -- --<0.0001 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00296 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.000386 -- -- --<0.00005 U -- --
<0.0000971 U -- --<0.0001 U -- --<0.0001 U -- --<0.0001 U -- --
<0.0000486 U -- --0.0000697 -- -- --0.0132 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00229 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --0.0000663 -- -- --0.00615 -- -- --<0.00005 U -- --
<0.0000971 U -- --0.000287 -- -- --0.0318 -- -- --<0.0001 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000971 U -- --0.000408 -- -- --0.056 -- -- --0.000187 -- -- --
<0.0000486 U -- --<0.00005 U -- --0.0000614 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000971 U -- --<0.0001 U -- --0.00383 -- -- --<0.0001 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00397 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00168 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00262 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.000223 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.0013 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0 -- -- --<0.00005 U -- --
<0.0000486 U -- --0.000111 -- -- --0.0436 -- -- --<0.00005 U -- --
<0.0000971 U -- --<0.0001 U -- --0.0129 -- -- --<0.0001 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00807 -- -- --<0.00005 U -- --
<0.0000486 U -- --0.000126 -- -- --0.0461 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00189 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00589 -- -- --<0.00005 U -- --
<0.0000486 U -- --0.0000779 -- -- --0.0266 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00967 -- -- --<0.00005 U -- --
<0.0000486 U -- --0.0000514 -- -- --0.0185 -- -- --<0.00005 U -- --
<0.0000971 U -- --0.000263 -- -- --0.119 -- -- --0.000117 -- -- --
<0.0000486 U -- --<0.00005 U -- --0.0000749 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000971 U -- --<0.0001 U -- --0.0352 -- -- --<0.0001 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --0.000189 -- -- --0.0591 -- -- --0.0000609 -- -- --
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00157 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.0112 -- -- --<0.00005 U -- --
<0.0000486 U -- --<0.00005 U -- --0.00203 -- -- --<0.00005 U -- --
11 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
MethodChemical Name CAS-RN Units
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 1668A mg/kg
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 1668A mg/kg
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 1668A mg/kg
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 1668A mg/kg
PCB 197/200 E52450871 1668A mg/kg
PCB 198/199 E52450889 1668A mg/kg
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 1668A mg/kg
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 1668A mg/kg
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 1668A mg/kg
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 1668A mg/kg
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 1668A mg/kg
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 1668A mg/kg
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 1668A mg/kg
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 1668A mg/kg
Decachlorobiphenyl (PCB 209) 2051-24-3 1668A mg/kg
Total PCBs (Congeners) totPCB_congener_ND=0 -- mg/kg
Total PCBs (Congeners) totPCB_congener_ND=QL/2 -- mg/kg
Total PCBs (Congeners) totPCB_congener_ND=LOD -- mg/kg
1-Methylnaphthalene 90-12-0 EPA 8270 mg/kg
1-Methylnaphthalene 90-12-0 EPA 8270D by SIM mg/kg
1,2-Dichlorobenzene 95-50-1 EPA 8270 mg/kg
1,2,4-Trichlorobenzene 120-82-1 EPA 8270 mg/kg
1,3-Dichlorobenzene 541-73-1 EPA 8270 mg/kg
1,4-Dichlorobenzene 106-46-7 EPA 8270 mg/kg
2-Chloronaphthalene 91-58-7 EPA 8270 mg/kg
2-Chlorophenol 95-57-8 EPA 8270 mg/kg
2-Methylnaphthalene 91-57-6 EPA 8270 mg/kg
2-Methylnaphthalene 91-57-6 EPA 8270D by SIM mg/kg
2-Methylphenol (O-Cresol) 95-48-7 EPA 8270 mg/kg
2-Nitroaniline 88-74-4 EPA 8270 mg/kg
2-Nitrophenol 88-75-5 EPA 8270 mg/kg
2,4-Dichlorophenol 120-83-2 EPA 8270 mg/kg
2,4-Dimethylphenol 105-67-9 EPA 8270 mg/kg
2,4-Dinitrophenol 51-28-5 EPA 8270 mg/kg
2,4-Dinitrotoluene 121-14-2 EPA 8270 mg/kg
2,4,5-Trichlorophenol 95-95-4 EPA 8270 mg/kg
2,4,6-Trichlorophenol 88-06-2 EPA 8270 mg/kg
2,6-Dinitrotoluene 606-20-2 EPA 8270 mg/kg
3- & 4-Methylphenol edms_0009 EPA 8270 mg/kg
3-Nitroaniline 99-09-2 EPA 8270 mg/kg
3,3'-Dichlorobenzidine 91-94-1 EPA 8270 mg/kg
4-Bromophenyl Phenyl Ether 101-55-3 EPA 8270 mg/kg
4-Chloro-3-Methylphenol 59-50-7 EPA 8270 mg/kg
4-Chloroaniline 106-47-8 EPA 8270 mg/kg
4-Chlorophenyl Phenyl Ether 7005-72-3 EPA 8270 mg/kg
4-Nitroaniline 100-01-6 EPA 8270 mg/kg
4-Nitrophenol 100-02-7 EPA 8270 mg/kg
4,6-Dinitro-2-Methylphenol 534-52-1 EPA 8270 mg/kg
Aniline (Phenylamine, Aminobenzene) 62-53-3 EPA 8270 mg/kg
Benzoic acid 65-85-0 EPA 8270 mg/kg
Benzyl Alcohol 100-51-6 EPA 8270 mg/kg
Benzyl Butyl Phthalate 85-68-7 EPA 8270 mg/kg
Bis(2-Chloroethoxy) Methane 111-91-1 EPA 8270 mg/kg
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 EPA 8270 mg/kg
SVOCs
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
92391723
7/12/2018
10:10:00
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
10439556
7/12/2018
<0.0000486 U -- --<0.00005 U -- --<0.00005 U -- --<0.00005 U -- --
<0.0000729 U -- --<0.000075 U -- --0.0317 -- -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --0.013 -- -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --0.0177 -- -- --<0.000075 U -- --
<0.000146 U -- --<0.00015 U -- --0.00541 -- -- --<0.00015 U -- --
<0.000146 U -- --<0.00015 U -- --0.0351 -- -- --<0.00015 U -- --
<0.0000729 U -- --<0.000075 U -- --0.00462 -- -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --0.00554 -- -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --0.0202 -- -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --<0.000075 U -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --0.0015 -- -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --0.00666 -- -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --0.00117 -- -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --0.00143 -- -- --<0.000075 U -- --
<0.0000729 U -- --<0.000075 U -- --0.000113 -- -- --<0.000075 U -- --
<0 U -- --0.0151384 -- -- --0.8235102 -- -- --0.0005789 -- -- --
<0.005183 U -- --0.0184509 -- -- --0.8248327 -- -- --0.0057124 -- -- --
<0.010366 U -- --0.0217634 -- -- --0.8261552 -- -- --0.0108459 -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0016 U -- --<0.0018 U -- --0.0027 J -- --<0.0017 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- --<0.0014 U -- --0.0023 J -- --0.0042 J -- --<0.0016 U
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
12 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
MethodChemical Name CAS-RN Units
Bis(2-Chloroisopropyl) Ether 108-60-1 EPA 8270 mg/kg
Bis(2-Ethylhexyl) Phthalate 117-81-7 EPA 8270 mg/kg
Di-N-Butyl Phthalate 84-74-2 EPA 8270 mg/kg
Di-N-Octylphthalate 117-84-0 EPA 8270 mg/kg
Dibenzofuran 132-64-9 EPA 8270 mg/kg
Diethyl Phthalate 84-66-2 EPA 8270 mg/kg
Dimethyl Phthalate 131-11-3 EPA 8270 mg/kg
Hexachlorobenzene 118-74-1 EPA 8270 mg/kg
Hexachlorobutadiene 87-68-3 EPA 8270 mg/kg
Hexachlorocyclopentadiene 77-47-4 EPA 8270 mg/kg
Hexachloroethane 67-72-1 EPA 8270 mg/kg
Isophorone 78-59-1 EPA 8270 mg/kg
N-Nitrosodi-N-Propylamine 621-64-7 EPA 8270 mg/kg
N-Nitrosodimethylamine 62-75-9 EPA 8270 mg/kg
N-Nitrosodiphenylamine 86-30-6 EPA 8270 mg/kg
Nitrobenzene 98-95-3 EPA 8270 mg/kg
Pentachlorophenol 87-86-5 EPA 8270 mg/kg
Phenol 108-95-2 EPA 8270 mg/kg
1,1-Dichloroethane 75-34-3 EPA 8260 mg/kg
1,1-Dichloroethene 75-35-4 EPA 8260 mg/kg
1,1-Dichloropropene 563-58-6 EPA 8260 mg/kg
1,1,1-Trichloroethane 71-55-6 EPA 8260 mg/kg
1,1,1,2-Tetrachloroethane 630-20-6 EPA 8260 mg/kg
1,1,2-Trichloroethane 79-00-5 EPA 8260 mg/kg
1,1,2,2-Tetrachloroethane 79-34-5 EPA 8260 mg/kg
1,2-Dibromo-3-Chloropropane 96-12-8 EPA 8260 mg/kg
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 EPA 8260 mg/kg
1,2-Dichlorobenzene 95-50-1 EPA 8260 mg/kg
1,2-Dichloroethane 107-06-2 EPA 8260 mg/kg
1,2-Dichloropropane 78-87-5 EPA 8260 mg/kg
1,2,3-Trichlorobenzene 87-61-6 EPA 8260 mg/kg
1,2,3-Trichloropropane 96-18-4 EPA 8260 mg/kg
1,2,4-Trichlorobenzene 120-82-1 EPA 8260 mg/kg
1,2,4-Trimethylbenzene 95-63-6 EPA 8260 mg/kg
1,3-Dichlorobenzene 541-73-1 EPA 8260 mg/kg
1,3-Dichloropropane 142-28-9 EPA 8260 mg/kg
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 EPA 8260 mg/kg
1,4-Dichlorobenzene 106-46-7 EPA 8260 mg/kg
2-Chlorotoluene 95-49-8 EPA 8260 mg/kg
2-Hexanone 591-78-6 EPA 8260 mg/kg
2,2-Dichloropropane 594-20-7 EPA 8260 mg/kg
4-Chlorotoluene 106-43-4 EPA 8260 mg/kg
Acetone 67-64-1 EPA 8260 mg/kg
Benzene 71-43-2 EPA 8260 mg/kg
Bromobenzene 108-86-1 EPA 8260 mg/kg
Bromochloromethane 74-97-5 EPA 8260 mg/kg
Bromodichloromethane 75-27-4 EPA 8260 mg/kg
Bromoform 75-25-2 EPA 8260 mg/kg
Bromomethane 74-83-9 EPA 8260 mg/kg
Carbon Tetrachloride 56-23-5 EPA 8260 mg/kg
Chlorobenzene 108-90-7 EPA 8260 mg/kg
Chloroethane 75-00-3 EPA 8260 mg/kg
Chloroform 67-66-3 EPA 8260 mg/kg
Chloromethane 74-87-3 EPA 8260 mg/kg
VOCs
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
92391723
7/12/2018
10:10:00
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
10439556
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
13 of 14
Table A-2
Sediment Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
MethodChemical Name CAS-RN Units
cis-1,2-Dichloroethene 156-59-2 EPA 8260 mg/kg
cis-1,3-Dichloropropene 10061-01-5 EPA 8260 mg/kg
Dibromochloromethane 124-48-1 EPA 8260 mg/kg
Dibromomethane 74-95-3 EPA 8260 mg/kg
Dichlorodifluoromethane 75-71-8 EPA 8260 mg/kg
Ethylbenzene 100-41-4 EPA 8260 mg/kg
Hexachlorobutadiene 87-68-3 EPA 8260 mg/kg
Isopropyl Ether 108-20-3 EPA 8260 mg/kg
Isopropylbenzene (Cumene) 98-82-8 EPA 8260 mg/kg
M,P-Xylene 179601-23-1 EPA 8260 mg/kg
Methyl Ethyl Ketone 78-93-3 EPA 8260 mg/kg
Methyl Isobutyl Ketone 108-10-1 EPA 8260 mg/kg
Methylene Chloride 75-09-2 EPA 8260 mg/kg
N-Butylbenzene 104-51-8 EPA 8260 mg/kg
N-Propylbenzene 103-65-1 EPA 8260 mg/kg
Naphthalene 91-20-3 EPA 8260 mg/kg
O-Xylene (1,2-Dimethylbenzene) 95-47-6 EPA 8260 mg/kg
p-Cymene (p-Isopropyltoluene) 99-87-6 EPA 8260 mg/kg
Sec-Butylbenzene 135-98-8 EPA 8260 mg/kg
Styrene 100-42-5 EPA 8260 mg/kg
T-Butylbenzene 98-06-6 EPA 8260 mg/kg
Tert-Butyl Methyl Ether 1634-04-4 EPA 8260 mg/kg
Tetrachloroethylene 127-18-4 EPA 8260 mg/kg
Toluene 108-88-3 EPA 8260 mg/kg
trans-1,2-Dichloroethene 156-60-5 EPA 8260 mg/kg
trans-1,3-Dichloropropene 10061-02-6 EPA 8260 mg/kg
Trichloroethylene 79-01-6 EPA 8260 mg/kg
Trichlorofluoromethane 75-69-4 EPA 8260 mg/kg
Vinyl Acetate 108-05-4 EPA 8260 mg/kg
Vinyl Chloride 75-01-4 EPA 8260 mg/kg
Xylenes 1330-20-7 EPA 8260 mg/kg
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
--
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD012
Eastern Drainage Ditch
ABL-SD012-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD011
Eastern Drainage Ditch
ABL-SD011-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
92391608
7/11/2018
0:00:00
Yes
Yes
ABL-SD010
Eastern Drainage Ditch
ABL-SD010-F005
10439419
7/11/2018
--
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
92391723
7/12/2018
10:10:00
Yes
Yes
ABL-SD008
Upgradient Little Mountain Creek
ABL-SD008-F005
10439556
7/12/2018
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
14 of 14
Table A-3
Soil Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Sys Loc Code:
Exposure Area:
Sample ID:
Lab Report ID:
Sample Date:
Sample Time
Station in SLERA?
Station in BERA?
Screening Level (mg/kg) Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
General Chemistry
Moisture, Percent MOIST ASTM D2974-87 %--30.6 --33.1 --34.6 --29.8 --32.1 --29.7 --32.2 --34 --31.3 --
PAHs
Acenaphthene 83-32-9 EPA 8270E mg/kg --<0.00073 U <0.00076 U <0.00076 U 0.041 --0.135 --<0.00071 U <0.00074 U <0.00076 U <0.00074 U
Acenaphthylene 208-96-8 EPA 8270E mg/kg --<0.00066 U <0.00069 U <0.00069 U <0.00065 U <0.00067 U <0.00064 U <0.00067 U <0.00069 U <0.00067 U
Anthracene 120-12-7 EPA 8270E mg/kg --<0.0006 U <0.00062 U 0.0198 --0.0905 --0.252 --0.0318 --<0.0006 U <0.00062 U <0.0006 U
Benzo[a]anthracene 56-55-3 EPA 8270E mg/kg --<0.0011 U 0.105 --0.107 --0.444 --1.04 --0.165 --0.0639 --0.0192 --0.0589 --
Benzo[a]pyrene 50-32-8 EPA 8270E mg/kg --<0.00073 U 0.118 --0.12 --0.484 --1.1 --0.185 --0.069 --0.0208 --0.0609 --
Benzo[b]fluoranthene 205-99-2 EPA 8270E mg/kg --0.0172 --0.201 --0.181 --0.731 --1.48 --0.269 --0.109 --0.0388 --0.117 --
Benzo[g,h,i]perylene 191-24-2 EPA 8270E mg/kg --<0.0016 U 0.103 --0.0925 --0.338 --0.609 --0.137 --0.0505 --0.0177 --0.0541 --
Benzo[k]fluoranthene 207-08-9 EPA 8270E mg/kg --<0.00058 U 0.0688 --0.076 --0.245 --0.444 --0.109 --0.0334 --<0.00061 U 0.0368 --
Chrysene 218-01-9 EPA 8270E mg/kg --<0.00071 U 0.115 --0.12 --0.49 --1.1 --0.178 --0.0675 --0.0218 --0.0681 --
Dibenz(A,H)Anthracene 53-70-3 EPA 8270E mg/kg --<0.0016 U 0.0305 --0.0273 --0.0991 --0.199 --0.041 --0.0162 --<0.0017 U 0.0171 --
Fluoranthene 206-44-0 EPA 8270E mg/kg --<0.0018 U 0.135 --0.158 --0.627 --1.58 --0.229 --0.0895 --0.0246 --0.198 --
Fluorene 86-73-7 EPA 8270E mg/kg --<0.00062 U <0.00064 U <0.00064 U 0.0312 --0.105 --<0.0006 U <0.00063 U <0.00065 U <0.00062 U
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270E mg/kg --<0.0013 U 0.0865 --0.0763 --0.28 --0.57 --0.113 --0.0424 --0.0155 --0.0426 --
Naphthalene 91-20-3 EPA 8270E mg/kg --<0.00093 U <0.00096 U <0.00096 U <0.00091 U 0.0178 --<0.0009 U <0.00094 U <0.00097 U <0.00093 U
Phenanthrene 85-01-8 EPA 8270E mg/kg --<0.0016 U 0.0636 --0.084 --0.393 --1.13 --0.136 --0.0539 --<0.0017 U 0.0294 --
Pyrene 129-00-0 EPA 8270E mg/kg --<0.0015 U 0.118 --0.136 --0.532 --1.33 --0.194 --0.0767 --0.0228 --0.126 --
Total HMW PAHs PAHs_highMW_ND=0 -- mg/kg 1.1 0.0172 --0.9458 --0.9361 --3.6431 --7.872 --1.391 --0.5286 --0.1566 --0.5815 --
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/kg 1.1 0.02176 --0.9458 --0.9361 --3.6431 --7.872 --1.391 --0.5286 --0.157755 --0.5815 --
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/kg 1.1 0.02632 --0.9458 --0.9361 --3.6431 --7.872 --1.391 --0.5286 --0.15891 --0.5815 --
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/kg 29 <0 U 0.1986 --0.2618 --1.1827 --3.2198 --0.3968 --0.1434 --0.0246 --0.2274 --
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/kg 29 <0.00347 U 0.200435 --0.263325 --1.18348 --3.220135 --0.398225 --0.14519 --0.027295 --0.22918 --
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/kg 29 <0.00694 U 0.20227 --0.26485 --1.18426 --3.22047 --0.39965 --0.14698 --0.02999 --0.23096 --
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/kg --<0.013 U <0.0134 U <0.0138 U <0.0126 U <0.0132 U <0.0127 U <0.013 U <0.0134 U <0.0128 U
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/kg --<0.0171 U <0.0176 U <0.0182 U <0.0167 U <0.0174 U <0.0167 U <0.0172 U <0.0177 U <0.0169 U
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/kg --<0.0121 U <0.0125 U <0.0129 U <0.0118 U <0.0123 U <0.0118 U <0.0122 U <0.0125 U <0.012 U
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/kg --<0.0032 U <0.0033 U <0.0034 U <0.0031 U <0.0033 U <0.0032 U <0.0032 U <0.0033 U <0.0032 U
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/kg --<0.0085 U <0.0087 U <0.009 U <0.0083 U <0.0086 U <0.0083 U <0.0085 U <0.0088 U <0.0084 U
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/kg --<0.0091 U <0.0093 U <0.0097 U <0.0088 U <0.0092 U <0.0089 U <0.0091 U <0.0094 U <0.009 U
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/kg --<0.0111 U <0.0114 U <0.0118 U <0.0108 U 0.0563 --<0.0108 U <0.0112 U <0.0115 U <0.011 U
Total PCBs (Aroclors) totPCB_ND=0 -- mg/kg 0.041 <0 U <0 U <0 U <0 U 0.0563 --<0 U <0 U <0 U <0 U
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/kg 0.041 <0.03705 U <0.0381 U <0.0394 U <0.03605 U 0.0883 --<0.0362 U <0.0372 U <0.0383 U <0.03665 U
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/kg 0.041 <0.0741 U <0.0762 U <0.0788 U <0.0721 U 0.1203 --<0.0724 U <0.0744 U <0.0766 U <0.0733 U
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270E mg/kg --<0.00089 U <0.00092 U <0.00092 U <0.00087 U <0.0009 U <0.00086 U <0.0009 U <0.00093 U <0.00089 U
2-Methylnaphthalene 91-57-6 EPA 8270E mg/kg --<0.00089 U <0.00092 U <0.00092 U <0.00087 U 0.0179 --<0.00086 U <0.0009 U <0.00093 U <0.00089 U
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Yes Yes Yes Yes
Yes Yes Yes Yes
-- -- -- --
12/10/2019 12/10/2019 12/10/2019 12/10/2019
SB-06 SB-07 SB-08 SB-09
92456982 92456982 92456982 92456982
Eastern Drainage Ditch Eastern Drainage Ditch Eastern Drainage Ditch Eastern Drainage Ditch
ABL-SB006 ABL-SB007 ABL-SB008 ABL-SB009
Yes Yes
Yes Yes
ABL-SB005
Eastern Drainage Ditch
SB-05
92456982
12/10/2019
--
Yes
Yes
92456982 92456982
12/10/2019 12/10/2019
-- --
ABL-SB003 ABL-SB004
Eastern Drainage Ditch Eastern Drainage Ditch
SB-03 SB-04
Chemical Name CAS-RN Method Units
--
Yes
Yes
ABL-SB002
Eastern Drainage Ditch
SB-02
92456982
12/10/2019
--
Yes
Yes
ABL-SB001
Eastern Drainage Ditch
SB-01
92456982
12/10/2019
1 of 2
Table A-3
Soil Samples
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
General Chemistry
Moisture, Percent MOIST ASTM D2974-87 %
PAHs
Acenaphthene 83-32-9 EPA 8270E mg/kg
Acenaphthylene 208-96-8 EPA 8270E mg/kg
Anthracene 120-12-7 EPA 8270E mg/kg
Benzo[a]anthracene 56-55-3 EPA 8270E mg/kg
Benzo[a]pyrene 50-32-8 EPA 8270E mg/kg
Benzo[b]fluoranthene 205-99-2 EPA 8270E mg/kg
Benzo[g,h,i]perylene 191-24-2 EPA 8270E mg/kg
Benzo[k]fluoranthene 207-08-9 EPA 8270E mg/kg
Chrysene 218-01-9 EPA 8270E mg/kg
Dibenz(A,H)Anthracene 53-70-3 EPA 8270E mg/kg
Fluoranthene 206-44-0 EPA 8270E mg/kg
Fluorene 86-73-7 EPA 8270E mg/kg
Indeno(1,2,3-C,D)Pyrene 193-39-5 EPA 8270E mg/kg
Naphthalene 91-20-3 EPA 8270E mg/kg
Phenanthrene 85-01-8 EPA 8270E mg/kg
Pyrene 129-00-0 EPA 8270E mg/kg
Total HMW PAHs PAHs_highMW_ND=0 -- mg/kg
Total HMW PAHs PAHs_highMW_ND=QL/2 -- mg/kg
Total HMW PAHs PAHs_highMW_ND=LOD -- mg/kg
Total LMW PAHs PAHs_lowMW_ND=0 -- mg/kg
Total LMW PAHs PAHs_lowMW_ND=QL/2 -- mg/kg
Total LMW PAHs PAHs_lowMW_ND=LOD -- mg/kg
PCB Aroclors
PCB-1016 (Aroclor 1016) 12674-11-2 EPA 8082A mg/kg
PCB-1221 (Aroclor 1221) 11104-28-2 EPA 8082A mg/kg
PCB-1232 (Aroclor 1232) 11141-16-5 EPA 8082A mg/kg
PCB-1242 (Aroclor 1242) 53469-21-9 EPA 8082A mg/kg
PCB-1248 (Aroclor 1248) 12672-29-6 EPA 8082A mg/kg
PCB-1254 (Aroclor 1254) 11097-69-1 EPA 8082A mg/kg
PCB-1260 (Aroclor 1260) 11096-82-5 EPA 8082A mg/kg
Total PCBs (Aroclors) totPCB_ND=0 -- mg/kg
Total PCBs (Aroclors) totPCB_ND=QL/2 -- mg/kg
Total PCBs (Aroclors) totPCB_ND=LOD -- mg/kg
SVOCs
1-Methylnaphthalene 90-12-0 EPA 8270E mg/kg
2-Methylnaphthalene 91-57-6 EPA 8270E mg/kg
Notes
Detected values exceeding the Screening Value are underlined and bolded
Detected values below the Screening Value are bolded
Non-detected values with a detection limit below the Screening Value are light gray
Non-detected values with a detection limit exceeding the Screening Value are presented in black
Chemical Name CAS-RN Method Units
Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers Result Qualifiers
34 --25.6 --27 --26.9 --29 --35 --24.4 --19.3 --23.1 --28.3 --23.7 --
<0.00075 U 0.0291 --<0.00068 U <0.00068 U <0.0007 U <0.00077 U <0.00067 U 0.249 --<0.00065 U <0.0007 U <0.00065 U
<0.00068 U 0.0136 --<0.00061 U <0.00062 U <0.00064 U <0.0007 U <0.00061 U 0.0289 --<0.00059 U 0.0197 --0.0398 --
0.0222 --0.0729 --<0.00055 U <0.00056 U <0.00057 U <0.00063 U 0.0175 --0.581 --<0.00053 U 0.0293 --0.0537 --
0.11 --0.271 --0.0489 --0.0296 --0.0281 --0.0301 --0.0851 --5.2 --0.0539 --0.154 --0.253 --
0.117 --0.318 --0.053 --0.0341 --0.0286 --0.0329 --0.0926 --6.66 --0.0559 --0.144 --0.19 --
0.206 --0.421 --0.0803 --0.0504 --0.061 --0.0613 --0.152 --9.66 --0.0986 --0.266 --0.373 --
0.0919 --0.232 --0.0419 --0.0245 --0.0227 --0.0267 --0.0701 --4.86 --0.0412 --0.0966 --0.11 --
0.0721 --0.142 --0.0323 --0.0189 --0.0199 --0.0234 --0.0643 --3.6 --0.035 --0.0773 --0.121 --
0.127 --0.272 --0.0564 --0.0325 --0.0329 --0.0337 --0.0967 --5.53 --0.06 --0.17 --0.253 --
0.0291 --0.0591 --<0.0015 U <0.0015 U <0.0016 U <0.0017 U 0.0224 --1.7 --0.0142 --0.0342 --0.0404 --
0.234 --0.387 --0.0666 --0.0483 --0.1 --0.046 --0.131 --5.35 --0.0801 --0.213 --0.211 --
<0.00064 U 0.0222 --<0.00058 U <0.00058 U <0.0006 U <0.00066 U <0.00057 U 0.209 --<0.00055 U <0.00059 U <0.00055 U
0.0764 --0.19 --0.034 --0.0205 --0.0207 --0.0229 --0.0592 --4.26 --0.0374 --0.0874 --0.105 --
<0.00096 U <0.00085 U <0.00086 U <0.00087 U <0.00089 U <0.00098 U <0.00085 U 0.12 --<0.00083 U <0.00089 U <0.00082 U
0.0872 --0.259 --0.0323 --0.0278 --0.0158 --0.0197 --0.0705 --2.56 --0.0349 --0.0931 --0.0586 --
0.147 --0.324 --0.0582 --0.0419 --0.0438 --0.0375 --0.107 --4.49 --0.0665 --0.179 --0.193 --
0.9765 --2.2291 --0.405 --0.2524 --0.2577 --0.2685 --0.7494 --45.96 --0.4627 --1.2085 --1.6384 --
0.9765 --2.2291 --0.40575 --0.25315 --0.2585 --0.26935 --0.7494 --45.96 --0.4627 --1.2085 --1.6384 --
0.9765 --2.2291 --0.4065 --0.2539 --0.2593 --0.2702 --0.7494 --45.96 --0.4627 --1.2085 --1.6384 --
0.3434 --0.7838 --0.0989 --0.0761 --0.1158 --0.0657 --0.219 --9.0979 --0.115 --0.3551 --0.3631 --
0.344915 --0.784225 --0.10054 --0.077755 --0.1175 --0.06757 --0.22035 --9.0979 --0.116575 --0.35619 --0.36411 --
0.34643 --0.78465 --0.10218 --0.07941 --0.1192 --0.06944 --0.2217 --9.0979 --0.11815 --0.35728 --0.36512 --
<0.0134 U <0.0117 U <0.0123 U <0.0124 U <0.0126 U <0.0138 U <0.0118 U <0.0112 U <0.0115 U <0.0124 U <0.0118 U
<0.0176 U <0.0155 U <0.0162 U <0.0163 U <0.0166 U <0.0181 U <0.0155 U <0.0147 U <0.0151 U <0.0163 U <0.0156 U
<0.0125 U <0.011 U <0.0115 U <0.0115 U <0.0118 U <0.0128 U <0.011 U <0.0104 U <0.0107 U <0.0116 U <0.011 U
<0.0033 U <0.0029 U <0.0031 U <0.0031 U <0.0031 U <0.0034 U <0.0029 U <0.0028 U <0.0029 U <0.0031 U <0.0029 U
<0.0087 U <0.0077 U <0.008 U <0.0081 U <0.0082 U <0.009 U <0.0077 U 0.117 --<0.0075 U <0.0081 U <0.0077 U
<0.0094 U <0.0082 U <0.0086 U <0.0086 U <0.0088 U <0.0096 U <0.0082 U 0.0875 --<0.008 U <0.0087 U <0.0082 U
<0.0114 U <0.0101 U <0.0105 U <0.0106 U <0.0108 U <0.0118 U <0.0101 U <0.0095 U <0.0098 U <0.0106 U <0.0101 U
<0 U <0 U <0 U <0 U <0 U <0 U <0 U 0.2045 --<0 U <0 U <0 U
<0.03815 U <0.03355 U <0.0351 U <0.0353 U <0.03595 U <0.03925 U <0.0336 U 0.2288 --<0.03275 U <0.0354 U <0.03365 U
<0.0763 U <0.0671 U <0.0702 U <0.0706 U <0.0719 U <0.0785 U <0.0672 U 0.2531 --<0.0655 U <0.0708 U <0.0673 U
<0.00092 U <0.00081 U <0.00082 U <0.00083 U <0.00085 U <0.00094 U <0.00082 U 0.0262 --<0.00079 U <0.00085 U <0.00079 U
<0.00092 U <0.00081 U <0.00082 U <0.00083 U <0.00085 U <0.00094 U <0.00082 U 0.0419 --<0.00079 U <0.00085 U <0.00079 U
Yes Yes Yes Yes YesYes Yes Yes Yes Yes
Yes
Yes
---- -- -- -- --
NoNo No No No No No No No No
--
12/10/2019 12/10/2019 12/10/2019 12/10/2019
-- -- -- --
12/10/201912/10/2019 12/10/2019 12/10/2019 12/10/2019 12/10/201912/10/2019
92456982 92456982 92456982 92456982 9245698292456982 92456982 92456982 92456982 92456982
SB-10
92456982
Substation BSubstation A Substation A Substation A Substation A Substation A
SB-20SB-11 SB-12 SB-13 SB-14 SB-15 SB-16 SB-17 SB-18 SB-19
Eastern Drainage Ditch
ABL-SB016 ABL-SB017 ABL-SB018 ABL-SB019
Substation B Substation B Substation B Substation B
ABL-SB020ABL-SB011 ABL-SB012 ABL-SB013 ABL-SB014 ABL-SB015ABL-SB010
2 of 2
Baseline Ecological Risk Assessment Work Plan, Badin Business Park
Appendix B PCB Congener Profiles
EHS Support LLC
Appendix B PCB Congener Profiles
Alcoa/Badin Landfill Baseline Ecological Risk
Assessment Work Plan
Concentrations of PCB Congeners in Surface Water from Little Mountain
Creek Figure B-1
Alcoa/Badin Landfill Baseline Ecological Risk
Assessment Work Plan
Concentrations of PCB Congeners in Surface Water from Little Mountain
Creek Figure B-2
Alcoa/Badin Landfill Baseline Ecological Risk
Assessment Work Plan
Concentrations of PCB Congeners in Sediments from Little Mountain Creek
and Eastern Drainage Ditch Figure B-3
Alcoa/Badin Landfill Baseline Ecological Risk
Assessment Work Plan
Concentrations of PCB Congeners in Surface Water from Eastern Drainage
Ditch Figure B-4
Alcoa/Badin Landfill Baseline Ecological Risk
Assessment Work Plan Concentrations of PCB Congeners in Sediments from Eastern Drainage Ditch Figure B-5
Baseline Ecological Risk Assessment Work Plan, Badin Business Park
Appendix C Comprehensive Screening Summary
EHS Support LLC
Appendix C Comprehensive Screening Summary
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/L 0.005 NCDEQ 0.0049 0.004 31 3 28 0.002 0.004 ABL-SW001 0.0049 0.003513 0 0 1.0 0.7 No COPEC: EPC<ESV
Cyanide, Available 57-12-5_AVAIL mg/L 0.005 NCDEQ -- -- 5 0 5 0.0003 0.0015 --0.0015 0.00126 0 0 0.3 0.3 No COPEC: QL<ESV
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 0.17 0.04 31 19 12 0.04 0.25 ABL-SW008(+100)0.25 0.081903 0 0 0.1 0.0 No COPEC: EPC<ESV
Metals
Antimony 7440-36-0 mg/L 5.3 NCDEQ -- -- 1 0 1 0.0039 0.0039 --0.0039 0.0039 0 0 0.0 0.0 No COPEC: QL<ESV
Arsenic 7440-38-2 mg/L 0.15 NCDEQ -- -- 23 0 23 0.005 0.005 --0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0109 0.0098 2 2 0 0.0025 0.0025 ABL-SW001 0.0109 0.01035 0 0 0.0 0.0 No COPEC: EPC<ESV
Beryllium 7440-41-7 mg/L 0.0065 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 0 0.0 0.0 No COPEC: QL<ESV
Cadmium 7440-43-9 mg/L 0.000413 See Notes -- -- 3 0 3 0.0005 0.0005 --0.0005 0.0005 0 3 1.2 1.2 Category 2: QL>ESV
Calcium 7440-70-2 mg/L 116 USEPA R4 11 11 4 4 0 0.025 0.025 ABL-SW009(-50), ABL-SW009(+50), ABL-SW008, ABL-
SW008([phone] 0.1 0.1 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/L 0.04063 See Notes -- -- 3 0 3 0.0025 0.0025 --0.0025 0.0025 0 0 0.1 0.1 No COPEC: QL<ESV
Copper 7440-50-8 mg/L 0.00478 See Notes -- -- 1 0 1 0.0025 0.0025 --0.0025 0.0025 0 0 0.5 0.5 No COPEC: QL<ESV
Lead 7439-92-1 mg/L 0.00112 See Notes 0.0026 0.0026 23 1 22 0.0025 0.0025 ABL-SW008 0.0026 0.002504 1 23 2.3 2.2 Category 1/5: Max EPC>ESV
Magnesium 7439-95-4 mg/L 82 USEPA R4 5.1 4.9 4 4 0 0.033 0.033 ABL-SW009(+50)5.1 5 0 0 0.1 0.1 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/L 0.000012 NCDEQ -- -- 3 0 3 0.00007 0.0001 --0.0001 0.00009 0 3 8.3 7.5 Category 2: QL>ESV
Nickel 7440-02-0 mg/L 0.02795 See Notes -- -- 1 0 1 0.0025 0.0025 --0.0025 0.0025 0 0 0.1 0.1 No COPEC: QL<ESV
Selenium 7782-49-2 mg/L 0.0151 NCDEQ -- -- 3 0 3 0.005 0.005 --0.005 0.005 0 0 0.3 0.3 No COPEC: QL<ESV
Silver 7440-22-4 mg/L 0.00006 NCDEQ -- -- 3 0 3 0.0025 0.0025 --0.0025 0.0025 0 3 41.7 41.7 Category 2: QL>ESV
Thallium 7440-28-0 mg/L 0.006 USEPA R4 -- -- 1 0 1 0.005 0.005 --0.005 0.005 0 0 0.8 0.8 No COPEC: QL<ESV
Zinc 7440-66-6 mg/L 0.06292 See Notes -- -- 1 0 1 0.0025 0.0025 --0.0025 0.0025 0 0 0.0 0.0 No COPEC: QL<ESV
Pesticides
alpha BHC (Alpha Hexachlorocyclohexane)319-84-6 mg/L 0.023 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 0 0.0 0.0 No COPEC: QL<ESV
Alpha Endosulfan 959-98-8 mg/L ------ -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
beta BHC (Beta Hexachlorocyclohexane)319-85-7 mg/L 0.055 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 0 0.0 0.0 No COPEC: QL<ESV
Beta Endosulfan 33213-65-9 mg/L 0.00005 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 0 1.0 1.0 No COPEC: QL<ESV
Chlordane 57-74-9 mg/L 0.000004 NCDEQ -- -- 1 0 1 0.0005 0.0005 --0.0005 0.0005 0 1 125.0 125.0 Category 2: QL>ESV
delta BHC (Delta Hexachlorocyclohexane)319-86-8 mg/L 0.04 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 0 0.0 0.0 No COPEC: QL<ESV
Dieldrin 60-57-1 mg/L 0.000002 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 1 25.0 25.0 Category 2: QL>ESV
Endosulfan sulfate 1031-07-8 mg/L 0.00005 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 0 1.0 1.0 No COPEC: QL<ESV
Endrin 72-20-8 mg/L 0.000002 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 1 25.0 25.0 Category 2: QL>ESV
Endrin Aldehyde 7421-93-4 mg/L ------ -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
gamma BHC (Lindane)58-89-9 mg/L 0.00001 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 1 5.0 5.0 Category 2: QL>ESV
Heptachlor 76-44-8 mg/L 0.000004 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 1 12.5 12.5 Category 2: QL>ESV
Heptachlor Epoxide 1024-57-3 mg/L 0.000004 USEPA R4 -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 1 12.5 12.5 Category 2: QL>ESV
P,P'-DDD 72-54-8 mg/L 0.00001 USEPA R4 -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 1 5.0 5.0 Category 2: QL>ESV
P,P'-DDE 72-55-9 mg/L 0.0003 USEPA R4 -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 0 0.2 0.2 No COPEC: QL<ESV
P,P'-DDT 50-29-3 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.00005 0.00005 --0.00005 0.00005 0 1 50.0 50.0 Category 2: QL>ESV
Toxaphene 8001-35-2 mg/L 0.0000002 NCDEQ -- -- 1 0 1 0.0005 0.0005 --0.0005 0.0005 0 1 2500.0 2500.0 Category 2: QL>ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016)12674-11-2 mg/L ------ -- 8 0 8 0.0001 0.0005 --0.0005 0.00041 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221)11104-28-2 mg/L ------ -- 8 0 8 0.0001 0.0005 --0.0005 0.00041 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232)11141-16-5 mg/L ------ -- 8 0 8 0.00012 0.0005 --0.0005 0.000413 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242)53469-21-9 mg/L ------ -- 8 0 8 7.7E-05 0.0005 --0.0005 0.000407 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248)12672-29-6 mg/L ------ -- 8 0 8 9.5E-05 0.0005 --0.0005 0.000409 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254)11097-69-1 mg/L ------ -- 8 0 8 9.5E-05 0.0005 --0.0005 0.000409 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260)11096-82-5 mg/L ------ -- 8 0 8 5.6E-05 0.0005 --0.0005 0.000405 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors)totPCB_ND=0 mg/L 0.000001 NCDEQ -- -- 8 0 8 0.00064 0.0035 --0.0035 0 0 0 3500.0 0.0 Category 2: QL>ESV
Total PCBs (Aroclors)totPCB_ND=QL/2 mg/L 0.000001 NCDEQ -- -- 8 0 8 0.00064 0.0035 --0.0035 0.001431 8 8 3500.0 1431.4 Category 2: QL>ESV
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
1 of 10
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
Total PCBs (Aroclors)totPCB_ND=LOD mg/L 0.000001 NCDEQ -- -- 8 0 8 0.00064 0.0035 --0.0035 0.002863 8 8 3500.0 2862.9 Category 2: QL>ESV
Chlorobiphenyl; 2- (PCB 1)2051-60-7 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 3- (PCB 2)2051-61-8 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 4- (PCB 3)2051-62-9 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,2'- (PCB 4)13029-08-8 mg/L ----0.000000357 0.000000357 5 1 4 2.5E-07 2.8E-07 ABL-SW008 3.57E-07 2.8E-07 0 0 -- -- Category 3: No ESV & Detect
Dichlorobiphenyl, 2,3- (PCB 5)16605-91-7 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3'- (PCB 6)25569-80-6 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4- (PCB 7)33284-50-3 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4'- (PCB 8)34883-43-7 mg/L ----0.000000331 0.000000331 5 1 4 2.5E-07 2.8E-07 ABL-SW008 3.31E-07 2.75E-07 0 0 -- -- Category 3: No ESV & Detect
Dichlorobiphenyl, 2,5- (PCB 9)34883-39-1 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,6- (PCB 10)33146-45-1 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,3'- (PCB 11)2050-67-1 mg/L ------ -- 5 0 5 2.4E-06 2.8E-06 --0.00000275 2.57E-06 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,4- (PCB 12)2974-92-7 mg/L ------ -- 1 0 1 5E-07 5E-07 --4.99E-07 4.99E-07 0 0 -- -- Category 4: No ESV & ND
PCB 12/13 E52450566 mg/L ------ -- 4 0 4 5.1E-07 5.6E-07 --5.62E-07 5.32E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,4'- (PCB 13)2974-90-5 mg/L ------ -- 1 0 1 5E-07 5E-07 --4.99E-07 4.99E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,5- (PCB 14)34883-41-5 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 4,4'- (PCB 15)2050-68-2 mg/L ----0.000000959 0.000000959 5 1 4 3.3E-07 3.7E-07 ABL-SW008 9.59E-07 4.67E-07 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',3- (PCB 16)38444-78-9 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',4- (PCB 17)37680-66-3 mg/L ----0.000000694 0.000000694 5 1 4 2.5E-07 2.8E-07 ABL-SW008 6.94E-07 3.47E-07 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',5- (PCB 18)37680-65-2 mg/L ------ -- 1 0 1 5E-07 5E-07 --4.99E-07 4.99E-07 0 0 -- -- Category 4: No ESV & ND
PCB 18/30 E52450574 mg/L ------ -- 4 0 4 5.1E-07 5.6E-07 --5.62E-07 5.32E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',6- (PCB 19)38444-73-4 mg/L ----0.000000289 0.000000289 5 1 4 2.5E-07 2.8E-07 ABL-SW008 2.89E-07 2.66E-07 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,3,3'- (PCB 20)38444-84-7 mg/L ------ -- 1 0 1 1.3E-06 1.3E-06 --0.00000129 1.29E-06 0 0 -- -- Category 4: No ESV & ND
PCB 20/28 E52450582 mg/L ----0.00000143 0.00000143 4 1 3 1.3E-06 1.5E-06 ABL-SW008 0.00000145 1.38E-06 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,3,4- (PCB 21)55702-46-0 mg/L ------ -- 1 0 1 1.4E-06 1.4E-06 --0.00000135 1.35E-06 0 0 -- -- Category 4: No ESV & ND
PCB 21/33 E52450590 mg/L ------ -- 4 0 4 1.4E-06 1.5E-06 --0.00000152 1.44E-06 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,4'- (PCB 22)38444-85-8 mg/L ------ -- 5 0 5 9.5E-07 1.1E-06 --0.00000107 9.99E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,5- (PCB 23)55720-44-0 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,6- (PCB 24)55702-45-9 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',4- (PCB 25)55712-37-3 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',5- (PCB 26)38444-81-4 mg/L ------ -- 1 0 1 5E-07 5E-07 --4.99E-07 4.99E-07 0 0 -- -- Category 4: No ESV & ND
PCB 26/29 E52450608 mg/L ------ -- 4 0 4 5.1E-07 5.6E-07 --5.62E-07 5.32E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',6- (PCB 27)38444-76-7 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4,4'- (PCB 28)7012-37-5 mg/L ------ -- 1 0 1 1.3E-06 1.3E-06 --0.00000129 1.29E-06 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4,5- (PCB 29)15862-07-4 mg/L ------ -- 1 0 1 5E-07 5E-07 --4.99E-07 4.99E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4,6- (PCB 30)35693-92-6 mg/L ------ -- 1 0 1 5E-07 5E-07 --4.99E-07 4.99E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4',5- (PCB 31)16606-02-3 mg/L ------ -- 5 0 5 1.3E-06 1.5E-06 --0.00000146 1.37E-06 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4',6- (PCB 32)38444-77-8 mg/L ----0.000000519 0.000000519 5 1 4 2.5E-07 2.8E-07 ABL-SW008 5.19E-07 3.12E-07 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,3',4'- (PCB 33)38444-86-9 mg/L ------ -- 1 0 1 1.4E-06 1.4E-06 --0.00000135 1.35E-06 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2',3,5- (PCB 34)37680-68-5 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',4- (PCB 35)37680-69-6 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',5- (PCB 36)38444-87-0 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,4'- (PCB 37)38444-90-5 mg/L ------ -- 5 0 5 5.3E-07 6E-07 --5.95E-07 5.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,5- (PCB 38)53555-66-1 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4',5- (PCB 39)38444-88-1 mg/L ------ -- 5 0 5 2.5E-07 2.8E-07 --2.81E-07 2.63E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,3'- (PCB 40)38444-93-8 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
PCB 40/41/71 E52450616 mg/L ------ -- 4 0 4 1.5E-06 1.7E-06 --0.00000169 1.6E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,4- (PCB 41)52663-59-9 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42)36559-22-5 mg/L ----0.000000615 0.000000615 5 1 4 5E-07 5.6E-07 ABL-SW008 6.15E-07 5.4E-07 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',3,5- (PCB 43)70362-46-8 mg/L ------ -- 1 0 1 5E-07 5E-07 --4.99E-07 4.99E-07 0 0 -- -- Category 4: No ESV & ND
2 of 10
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
PCB 43/73 (43/73) mg/L ------ -- 4 0 4 5.1E-07 5.6E-07 --5.62E-07 5.32E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,5'- (PCB 44)41464-39-5 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
PCB 44/47/65 E52450624 mg/L ----0.00000292 0.00000292 4 1 3 1.5E-06 1.7E-06 ABL-SW008 0.00000292 1.92E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',3,6- (PCB 45)70362-45-7 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 45/51 E52450632 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46)41464-47-5 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',4,4'- (PCB 47)2437-79-8 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48)70362-47-9 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',4,5'- (PCB 49)41464-40-8 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 49/69 E52450640 mg/L ----0.00000177 0.00000177 4 1 3 1E-06 1.1E-06 ABL-SW008 0.00000177 1.24E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',4,6- (PCB 50)62796-65-0 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 50/53 E52450657 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',4,6'- (PCB 51)68194-04-7 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52)35693-99-3 mg/L ----0.00000221 0.00000221 5 1 4 1.5E-06 1.7E-06 ABL-SW008 0.00000221 1.73E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',5,6'- (PCB 53)41464-41-9 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54)15968-05-5 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55)74338-24-2 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56)41464-43-1 mg/L ----0.00000127 0.00000127 5 1 4 5E-07 5.6E-07 ABL-SW008 0.00000127 6.71E-07 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57)70424-67-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58)41464-49-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',6- (PCB 59)74472-33-6 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
PCB 59/62/75 E52450665 mg/L ------ -- 4 0 4 1.5E-06 1.7E-06 --0.00000169 1.6E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60)33025-41-1 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4,5- (PCB 61)33284-53-6 mg/L ------ -- 1 0 1 2E-06 2E-06 --0.000002 0.000002 0 0 -- -- Category 4: No ESV & ND
PCB 61/70/74/76 E52450673 mg/L ----0.00000379 0.00000379 4 1 3 2E-06 2.3E-06 ABL-SW008 0.00000379 2.54E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4,6- (PCB 62)54230-22-7 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63)74472-34-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64)52663-58-8 mg/L ----0.00000106 0.00000106 5 1 4 5E-07 5.6E-07 ABL-SW008 0.00000106 6.29E-07 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,5,6- (PCB 65)33284-54-7 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66)32598-10-0 mg/L ----0.00000319 0.00000319 5 1 4 8.4E-07 9.4E-07 ABL-SW008 0.00000319 1.34E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67)73575-53-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68)73575-52-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,6- (PCB 69)60233-24-1 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4',5- (PCB 70)32598-11-1 mg/L ------ -- 1 0 1 2E-06 2E-06 --0.000002 0.000002 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4',6- (PCB 71)41464-46-4 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72)41464-42-0 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73)74338-23-1 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,4,4',5- (PCB 74)32690-93-0 mg/L ------ -- 1 0 1 2E-06 2E-06 --0.000002 0.000002 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,4,4',6- (PCB 75)32598-12-2 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2',3,4,5- (PCB 76)70362-48-0 mg/L ------ -- 1 0 1 2E-06 2E-06 --0.000002 0.000002 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77)32598-13-3 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78)70362-49-1 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79)41464-48-6 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80)33284-52-5 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81)70362-50-4 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82)52663-62-4 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83)60145-20-2 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84)52663-60-2 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,4,4'- (PCB 85)65510-45-4 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
PCB 85/117/116 E52450699 mg/L ------ -- 4 0 4 1.5E-06 1.7E-06 --0.00000169 1.6E-06 0 0 -- -- Category 4: No ESV & ND
3 of 10
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
Pentachlorobiphenyl, 2,2',3,4,5- (PCB 86)55312-69-1 mg/L ------ -- 1 0 1 3E-06 3E-06 --0.00000299 2.99E-06 0 0 -- -- Category 4: No ESV & ND
PCB 86/87/97/108/119/125 E52450707 mg/L ------ -- 4 0 4 3E-06 3.4E-06 --0.00000337 3.2E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,4,5'- (PCB 87)38380-02-8 mg/L ------ -- 1 0 1 3E-06 3E-06 --0.00000299 2.99E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,4,6- (PCB 88)55215-17-3 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 88/91 E52450715 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89)73575-57-2 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,4',5- (PCB 90)68194-07-0 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
PCB 90/101/113 E52450723 mg/L ----0.00000174 0.00000174 4 1 3 1.5E-06 1.7E-06 ABL-SW008 0.00000174 1.63E-06 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,4',6- (PCB 91)68194-05-8 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92)52663-61-3 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,6- (PCB 93)73575-56-1 mg/L ------ -- 1 0 1 2E-06 2E-06 --0.000002 0.000002 0 0 -- -- Category 4: No ESV & ND
PCB 93/98/100/102 (93/98/100/102) mg/L ------ -- 4 0 4 2E-06 2.3E-06 --0.00000225 2.13E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94)73575-55-0 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95)38379-99-6 mg/L ----0.00000125 0.00000125 5 1 4 9.5E-07 1.1E-06 ABL-SW008 0.00000125 1.04E-06 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96)73575-54-9 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3',4,5- (PCB 97)41464-51-1 mg/L ------ -- 1 0 1 3E-06 3E-06 --0.00000299 2.99E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3',4,6- (PCB 98)60233-25-2 mg/L ------ -- 1 0 1 2E-06 2E-06 --0.000002 0.000002 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99)38380-01-7 mg/L ----0.00000139 0.00000139 5 1 4 5E-07 5.6E-07 ABL-SW008 0.00000139 6.95E-07 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',4,4',6- (PCB 100)39485-83-1 mg/L ------ -- 1 0 1 2E-06 2E-06 --0.000002 0.000002 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,5,5'- (PCB 101)37680-73-2 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,5,6'- (PCB 102)68194-06-9 mg/L ------ -- 1 0 1 2E-06 2E-06 --0.000002 0.000002 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103)60145-21-3 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104)56558-16-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105)32598-14-4 mg/L ----0.000000897 0.000000897 5 1 4 5E-07 5.6E-07 ABL-SW008 8.97E-07 5.96E-07 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106)70424-69-0 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4',5- (PCB 107)70424-68-9 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 107/124 E52450749 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,5'- (PCB 108)70362-41-3 mg/L ------ -- 1 0 1 3E-06 3E-06 --0.00000299 2.99E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109)74472-35-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4',6- (PCB 110)38380-03-9 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 110/115 E52450756 mg/L ----0.00000234 0.00000234 4 1 3 1E-06 1.1E-06 ABL-SW008 0.00000234 1.38E-06 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111)39635-32-0 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112)74472-36-9 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',5',6- (PCB 113)68194-10-5 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114)74472-37-0 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,4,4',6- (PCB 115)74472-38-1 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,4,5,6- (PCB 116)18259-05-7 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,4',5,6- (PCB 117)68194-11-6 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118)31508-00-6 mg/L ----0.00000174 0.00000174 5 1 4 6.4E-07 7.2E-07 ABL-SW008 0.00000174 8.81E-07 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3',4,4',6- (PCB 119)56558-17-9 mg/L ------ -- 1 0 1 3E-06 3E-06 --0.00000299 2.99E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120)68194-12-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121)56558-18-0 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122)76842-07-4 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123)65510-44-3 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,4,5,5'- (PCB 124)70424-70-3 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,4,5,6- (PCB 125)74472-39-2 mg/L ------ -- 1 0 1 3E-06 3E-06 --0.00000299 2.99E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126)57465-28-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127)39635-33-1 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,4'- (PCB 128)38380-07-3 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 128/166 E52450764 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
4 of 10
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
Hexachlorobiphenyl, 2,2',3,3',4,5- (PCB 129)55215-18-4 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
PCB 129/138/163 (129/138/163) mg/L ------ -- 4 0 4 1.5E-06 1.7E-06 --0.00000169 1.6E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130)52663-66-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131)61798-70-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132)38380-05-1 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133)35694-04-3 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',5,6- (PCB 134)52704-70-8 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 134/143 E52450780 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',5,6'- (PCB 135)52744-13-5 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 135/151 (135/151) mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136)38411-22-2 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137)35694-06-5 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,4',5'- (PCB 138)35065-28-2 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,4',6- (PCB 139)56030-56-9 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 139/140 E52450806 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,4',6'- (PCB 140)59291-64-4 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141)52712-04-6 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142)41411-61-4 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,6'- (PCB 143)68194-15-0 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144)68194-14-9 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145)74472-40-5 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146)51908-16-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5,6- (PCB 147)68194-13-8 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 147/149 E52450814 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148)74472-41-6 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5',6- (PCB 149)38380-04-0 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150)68194-08-1 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,5,5',6- (PCB 151)52663-63-5 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152)68194-09-2 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',4,4',5,5'- (PCB 153)35065-27-1 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 153/168 E52450822 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154)60145-22-4 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155)33979-03-2 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156)38380-08-4 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 156/157 E52450830 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157)69782-90-7 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158)74472-42-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159)39635-35-3 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160)41411-62-5 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161)74472-43-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162)39635-34-2 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5,6- (PCB 163)74472-44-9 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164)74472-45-0 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165)74472-46-1 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,4,4',5,6- (PCB 166)41411-63-6 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167)52663-72-6 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3',4,4',5',6- (PCB 168)59291-65-5 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169)32774-16-6 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170)35065-30-6 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,4',6- (PCB 171)52663-71-5 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
5 of 10
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
PCB 171/173 E52450848 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172)52663-74-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,6- (PCB 173)68194-16-1 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174)38411-25-5 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175)40186-70-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176)52663-65-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177)52663-70-4 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178)52663-67-9 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179)52663-64-6 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5,5'- (PCB 180)35065-29-3 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 180/193 E52450855 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181)74472-47-2 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182)60145-23-5 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5',6- (PCB 183)52663-69-1 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
PCB 183/185 E52450863 mg/L ------ -- 4 0 4 1E-06 1.1E-06 --0.00000112 1.07E-06 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184)74472-48-3 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,5,5',6- (PCB 185)52712-05-7 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186)74472-49-4 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187)52663-68-0 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188)74487-85-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189)39635-31-9 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190)41411-64-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191)74472-50-7 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192)74472-51-8 mg/L ------ -- 5 0 5 5E-07 5.6E-07 --5.62E-07 5.26E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4',5,5',6- (PCB 193)69782-91-8 mg/L ------ -- 1 0 1 1E-06 1E-06 --9.98E-07 9.98E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194)35694-08-7 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195)52663-78-2 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196)42740-50-1 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',6,6'- (PCB 197)33091-17-7 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
PCB 197/200 E52450871 mg/L ------ -- 4 0 4 1.5E-06 1.7E-06 --0.00000169 1.6E-06 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,5,5',6- (PCB 198)68194-17-2 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
PCB 198/199 E52450889 mg/L ------ -- 4 0 4 1.5E-06 1.7E-06 --0.00000169 1.6E-06 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4',5,5',6'- (PCB 199)52663-75-9 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,5,6,6'- (PCB 200)52663-73-7 mg/L ------ -- 1 0 1 1.5E-06 1.5E-06 --0.0000015 1.5E-06 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201)40186-71-8 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202)2136-99-4 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203)52663-76-0 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204)74472-52-9 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205)74472-53-0 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206)40186-72-9 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207)52663-79-3 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208)52663-77-1 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Decachlorobiphenyl (PCB 209)2051-24-3 mg/L ------ -- 5 0 5 7.5E-07 8.4E-07 --8.43E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Congeners)totPCB_congener_ND=0 mg/L 0.000001 NCDEQ 0.000030761 0.000030761 5 1 4 0.00011 0.00017 ABL-SW008 0.00017453 6.15E-06 1 1 174.5 6.2 Category 1/5: Max EPC>ESV
Total PCBs (Congeners)totPCB_congener_ND=QL/2 mg/L 0.000001 NCDEQ 0.000079833 0.000079833 5 1 4 0.00011 0.00017 ABL-SW008 0.00017453 6.73E-05 5 5 174.5 67.3 Category 1/5: Max EPC>ESV
Total PCBs (Congeners)totPCB_congener_ND=LOD mg/L 0.000001 NCDEQ 0.000128905 0.000128905 5 1 4 0.00011 0.00017 ABL-SW008 0.00017453 0.000128 5 5 174.5 128.4 Category 1/5: Max EPC>ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/L 0.056 See Notes -- -- 5 0 5 0.00017 0.0017 --0.0017 0.001084 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/L 0.307 See Notes -- -- 5 0 5 0.00018 0.0018 --0.0018 0.001118 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/L 0.021 See Notes -- -- 5 0 5 0.00014 0.0017 --0.0017 0.000844 0 0 0.1 0.0 No COPEC: QL<ESV
6 of 10
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
Benzo[a]anthracene 56-55-3 mg/L 0.0022 See Notes 0.0053 0.0053 5 1 4 0.00018 0.0018 ABL-SW008 0.0053 0.001744 1 1 2.4 0.8 Category 1/5: Max EPC>ESV
Benzo[a]pyrene 50-32-8 mg/L 0.00096 See Notes 0.0013 0.0013 5 1 4 0.00016 0.0021 ABL-SW008 0.0021 0.000996 1 2 2.2 1.0 Category 1/5: Max EPC>ESV
Benzo[b]fluoranthene 205-99-2 mg/L 0.00068 See Notes 0.0015 0.0015 5 1 4 0.00019 0.0019 ABL-SW008 0.0019 0.001042 1 4 2.8 1.5 Category 1/5: Max EPC>ESV
Benzo[g,h,i]perylene 191-24-2 mg/L 0.00044 See Notes -- -- 5 0 5 0.00018 0.0014 --0.0014 0.00078 0 3 3.2 1.8 Category 2: QL>ESV
Benzo[k]fluoranthene 207-08-9 mg/L 0.00064 See Notes 0.0017 0.0017 5 1 4 0.00043 0.0019 ABL-SW008 0.0019 0.001198 1 5 3.0 1.9 Category 1/5: Max EPC>ESV
Chrysene 218-01-9 mg/L 0.002 See Notes 0.0057 0.0057 5 1 4 0.00017 0.0017 ABL-SW008 0.0057 0.001774 1 1 2.9 0.9 Category 1/5: Max EPC>ESV
Dibenz(A,H)Anthracene 53-70-3 mg/L 0.00028 See Notes -- -- 5 0 5 0.00018 0.0016 --0.0016 0.000746 0 4 5.7 2.7 Category 2: QL>ESV
Fluoranthene 206-44-0 mg/L 0.0071 See Notes -- -- 5 0 5 0.00019 0.0017 --0.0017 0.000768 0 0 0.2 0.1 No COPEC: QL<ESV
Fluorene 86-73-7 mg/L 0.039 See Notes -- -- 5 0 5 0.00021 0.0016 --0.0016 0.001054 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/L 0.00028 See Notes -- -- 5 0 5 0.00024 0.0018 --0.0018 0.001146 0 4 6.4 4.1 Category 2: QL>ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 5 0 5 0.00017 0.0015 --0.0015 0.000982 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/L 0.019 See Notes -- -- 5 0 5 0.00022 0.0017 --0.0017 0.000886 0 0 0.1 0.0 No COPEC: QL<ESV
Pyrene 129-00-0 mg/L 0.01 See Notes 0.0012 0.0012 5 1 4 0.00019 0.0021 ABL-SW008 0.0021 0.00091 0 0 0.2 0.1 No COPEC: EPC<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/L ----0.0167 0.0167 5 1 4 0.00214 0.0161 ABL-SW008 0.0167 0.00334 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/L ----0.01731 0.01731 5 1 4 0.00214 0.0161 ABL-SW008 0.01731 0.006838 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=LOD mg/L ----0.01792 0.01792 5 1 4 0.00214 0.0161 ABL-SW008 0.01792 0.010336 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=0 mg/L ------ -- 5 0 5 0.00158 0.0113 --0.0113 0 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/L ------ -- 5 0 5 0.00158 0.0113 --0.0113 0.003368 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=LOD mg/L ------ -- 5 0 5 0.00158 0.0113 --0.0113 0.006736 0 0 -- -- Category 4: No ESV & ND
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/L 0.075 See Notes -- -- 2 0 2 0.0018 0.0018 --0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 3 0 3 0.0012 0.0013 --0.0013 0.001233 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Diphenylhydrazine 122-66-7 mg/L 0.0011 USEPA R4 -- -- 2 0 2 0.0009 0.0023 --0.0023 0.0016 0 1 2.1 1.5 Category 2: QL>ESV
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 3 0 3 0.0015 0.0019 --0.0019 0.001767 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 3 0 3 0.0011 0.0015 --0.0015 0.001233 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 0.003 0.003 3 1 2 0.0012 0.0021 ABL-SW008 0.003 0.0018 0 0 0.3 0.2 No COPEC: EPC<ESV
2-Chloronaphthalene 91-58-7 mg/L 0.11 NCDEQ -- -- 4 0 4 0.00098 0.0022 --0.0022 0.00172 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorophenol 95-57-8 mg/L 0.018 USEPA R4 -- -- 4 0 4 0.0012 0.0015 --0.0015 0.001375 0 0 0.1 0.1 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/L 0.072 See Notes -- -- 3 0 3 0.00028 0.0017 --0.0017 0.001227 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol)95-48-7 mg/L 0.067 USEPA R4 -- -- 2 0 2 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/L 0.017 USEPA R4 -- -- 2 0 2 0.0028 0.0028 --0.0028 0.0028 0 0 0.2 0.2 No COPEC: QL<ESV
2-Nitrophenol 88-75-5 mg/L 0.073 USEPA R4 -- -- 4 0 4 0.00091 0.0017 --0.0017 0.001428 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/L 0.011 USEPA R4 -- -- 4 0 4 0.0014 0.0017 --0.0017 0.001625 0 0 0.2 0.1 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/L 0.015 USEPA R4 -- -- 4 0 4 0.0012 0.0022 --0.0022 0.00175 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/L 0.071 USEPA R4 -- -- 4 0 4 0.0065 0.0405 --0.0405 0.015625 0 0 0.6 0.2 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/L 0.044 USEPA R4 -- -- 4 0 4 0.0009 0.0012 --0.0012 0.001125 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/L 0.0019 USEPA R4 -- -- 2 0 2 0.0022 0.0022 --0.0022 0.0022 0 2 1.2 1.2 Category 2: QL>ESV
2,4,6-Trichlorophenol 88-06-2 mg/L 0.0049 USEPA R4 -- -- 4 0 4 0.0013 0.0019 --0.0019 0.00165 0 0 0.4 0.3 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/L 0.081 USEPA R4 -- -- 4 0 4 0.00098 0.0017 --0.0017 0.001445 0 0 0.0 0.0 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/L 0.053 See Notes -- -- 3 0 3 0.0017 0.002 --0.002 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
3-Nitroaniline 99-09-2 mg/L ------ -- 2 0 2 0.0024 0.0024 --0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/L 0.0045 USEPA R4 -- -- 4 0 4 0.0014 0.003 --0.003 0.001975 0 0 0.7 0.4 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/L 0.002 NCDEQ -- -- 4 0 4 0.00082 0.0016 --0.0016 0.001255 0 0 0.8 0.6 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/L 0.001 USEPA R4 -- -- 4 0 4 0.0028 0.0042 --0.0042 0.003725 0 4 4.2 3.7 Category 2: QL>ESV
4-Chloroaniline 106-47-8 mg/L 0.0008 USEPA R4 -- -- 2 0 2 0.0034 0.0034 --0.0034 0.0034 0 2 4.3 4.3 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/L ------ -- 4 0 4 0.00087 0.0021 --0.0021 0.001668 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/L ------ -- 2 0 2 0.0025 0.0025 --0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/L 0.058 USEPA R4 0.0098 0.0098 4 1 3 0.0035 0.0058 ABL-SW008 0.0098 0.006225 0 0 0.2 0.1 No COPEC: EPC<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/L ------ -- 4 0 4 0.0017 0.0152 --0.0152 0.0053 0 0 -- -- Category 4: No ESV & ND
Aniline (Phenylamine, Aminobenzene)62-53-3 mg/L 0.0041 USEPA R4 -- -- 2 0 2 0.0013 0.0013 --0.0013 0.0013 0 0 0.3 0.3 No COPEC: QL<ESV
7 of 10
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
Benzidine 92-87-5 mg/L 0.0015 USEPA R4 -- -- 2 0 2 0.0027 0.0051 --0.0051 0.0039 0 2 3.4 2.6 Category 2: QL>ESV
Benzoic acid 65-85-0 mg/L 9 NCDEQ -- -- 2 0 2 0.0111 0.0111 --0.0111 0.0111 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Alcohol 100-51-6 mg/L 0.5 NCDEQ -- -- 2 0 2 0.0034 0.0034 --0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/L 0.019 NCDEQ 0.0061 0.0061 4 1 3 0.00075 0.0016 ABL-SW008 0.0061 0.0023 0 0 0.3 0.1 No COPEC: EPC<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/L 9.2 NCDEQ -- -- 4 0 4 0.00092 0.0018 --0.0018 0.00153 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether)111-44-4 mg/L ------ -- 4 0 4 0.001 0.0018 --0.0018 0.00145 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/L ------ -- 4 0 4 0.00095 0.0028 --0.0028 0.001738 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/L 0.005 NCDEQ 0.0048 0.0024 4 2 2 0.00079 0.0021 ABL-SW008 0.0048 0.002225 0 0 1.0 0.4 No COPEC: EPC<ESV
Di-N-Butyl Phthalate 84-74-2 mg/L 0.0095 NCDEQ -- -- 4 0 4 0.00075 0.0018 --0.0018 0.001188 0 0 0.2 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/L 0.215 USEPA R4 0.0019 0.0019 4 1 3 0.00066 0.0018 ABL-SW008 0.0019 0.001355 0 0 0.0 0.0 No COPEC: EPC<ESV
Dibenzofuran 132-64-9 mg/L 0.004 USEPA R4 -- -- 2 0 2 0.0018 0.0018 --0.0018 0.0018 0 0 0.5 0.5 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/L 1.2 NCDEQ -- -- 4 0 4 0.00058 0.0024 --0.0024 0.001395 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/L 3.4 NCDEQ -- -- 4 0 4 0.00076 0.0016 --0.0016 0.00134 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/L 0.00015 USEPA R4 -- -- 4 0 4 0.00072 0.0017 --0.0017 0.001155 0 4 11.3 7.7 Category 2: QL>ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 4 0 4 0.00094 0.002 --0.002 0.001635 0 3 2.0 1.6 Category 2: QL>ESV
Hexachlorocyclopentadiene 77-47-4 mg/L 0.00007 NCDEQ -- -- 4 0 4 0.00088 0.0018 --0.0018 0.001545 0 4 25.7 22.1 Category 2: QL>ESV
Hexachloroethane 67-72-1 mg/L 0.012 USEPA R4 -- -- 4 0 4 0.0011 0.002 --0.002 0.001525 0 0 0.2 0.1 No COPEC: QL<ESV
Isophorone 78-59-1 mg/L 0.92 USEPA R4 -- -- 4 0 4 0.00089 0.0018 --0.0018 0.001523 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/L ------ -- 4 0 4 0.00099 0.0022 --0.0022 0.001848 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/L 17 NCDEQ -- -- 4 0 4 0.00091 0.0013 --0.0013 0.001178 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodiphenylamine 86-30-6 mg/L 0.29 NCDEQ -- -- 4 0 4 0.001 0.0017 --0.0017 0.001325 0 0 0.0 0.0 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/L 4.6 NCDEQ -- -- 4 0 4 0.0011 0.0021 --0.0021 0.00165 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/L 0.015 USEPA R4 -- -- 4 0 4 0.0022 0.0046 --0.0046 0.00285 0 0 0.3 0.2 No COPEC: QL<ESV
Phenol 108-95-2 mg/L 0.16 USEPA R4 0.009 0.009 5 1 4 0.00091 0.005 ABL-SW008 0.009 0.003042 0 0 0.1 0.0 No COPEC: EPC<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/L 0.41 USEPA R4 -- -- 3 0 3 0.0018 0.0018 --0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/L 0.13 USEPA R4 -- -- 3 0 3 0.0019 0.0019 --0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/L ------ -- 2 0 2 0.0017 0.0017 --0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/L 2.5 NCDEQ -- -- 3 0 3 0.0019 0.0019 --0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/L 0.085 USEPA R4 -- -- 2 0 2 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/L 2.3 NCDEQ -- -- 3 0 3 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/L 0.2 USEPA R4 -- -- 3 0 3 0.0015 0.0015 --0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/L ------ -- 2 0 2 0.0017 0.0017 --0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide)106-93-4 mg/L ------ -- 2 0 2 0.0017 0.0017 --0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 3 0 3 0.0015 0.0015 --0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/L 2 USEPA R4 -- -- 3 0 3 0.0018 0.0018 --0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-dichloroethene (cis+trans)540-59-0 mg/L 0.97 USEPA R4 -- -- 2 0 2 0.0044 0.0044 --0.0044 0.0044 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/L 0.52 USEPA R4 -- -- 3 0 3 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/L 0.008 USEPA R4 -- -- 2 0 2 0.002 0.002 --0.002 0.002 0 0 0.3 0.3 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/L ------ -- 2 0 2 0.0015 0.0015 --0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 3 0 3 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/L 0.39 NCDEQ -- -- 2 0 2 0.0015 0.0015 --0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 3 0 3 0.0015 0.0015 --0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/L ------ -- 2 0 2 0.0017 0.0017 --0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene)108-67-8 mg/L 0.63 NCDEQ -- -- 2 0 2 0.0013 0.0013 --0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 3 0 3 0.0015 0.0015 --0.0015 0.0015 0 0 0.2 0.2 No COPEC: QL<ESV
2-Chloroethyl Vinyl Ether 110-75-8 mg/L ------ -- 1 0 1 0.0022 0.0022 --0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
2-Chlorotoluene 95-49-8 mg/L ------ -- 2 0 2 0.0015 0.0015 --0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/L 0.099 USEPA R4 -- -- 2 0 2 0.0038 0.0038 --0.0038 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/L ------ -- 2 0 2 0.0016 0.0016 --0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
8 of 10
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
4-Chlorotoluene 106-43-4 mg/L ------ -- 2 0 2 0.0016 0.0016 --0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/L 2 NCDEQ -- -- 2 0 2 0.01 0.01 --0.01 0.01 0 0 0.0 0.0 No COPEC: QL<ESV
Acrolein 107-02-8 mg/L 0.003 USEPA R4 -- -- 1 0 1 0.001 0.001 --0.001 0.001 0 0 0.3 0.3 No COPEC: QL<ESV
Acrylonitrile 107-13-1 mg/L 0.42 NCDEQ -- -- 1 0 1 0.0115 0.0115 --0.0115 0.0115 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/L 0.16 USEPA R4 -- -- 3 0 3 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/L ------ -- 2 0 2 0.0015 0.0015 --0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/L ------ -- 2 0 2 0.0022 0.0022 --0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/L 0.34 USEPA R4 -- -- 3 0 3 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/L 0.23 USEPA R4 -- -- 3 0 3 0.0015 0.0015 --0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/L 0.00004 NCDEQ -- -- 3 0 3 0.001 0.0025 --0.0025 0.002 0 3 62.5 50.0 Category 2: QL>ESV
Carbon Tetrachloride 56-23-5 mg/L 0.077 USEPA R4 -- -- 3 0 3 0.0019 0.0019 --0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/L 0.14 NCDEQ -- -- 3 0 3 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/L ------ -- 3 0 3 0.0016 0.0016 --0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/L 0.14 USEPA R4 -- -- 3 0 3 0.0019 0.0019 --0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/L ------ -- 3 0 3 0.0015 0.0015 --0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/L 0.62 USEPA R4 -- -- 2 0 2 0.0018 0.0018 --0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/L 0.0017 USEPA R4 -- -- 3 0 3 0.0016 0.0016 --0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Dibromochloromethane 124-48-1 mg/L 0.32 USEPA R4 -- -- 3 0 3 0.0018 0.0018 --0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/L ------ -- 2 0 2 0.002 0.002 --0.002 0.002 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/L ------ -- 2 0 2 0.0016 0.0016 --0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/L 0.097 NCDEQ -- -- 3 0 3 0.0016 0.0016 --0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 2 0 2 0.0018 0.0018 --0.0018 0.0018 0 2 1.8 1.8 Category 2: QL>ESV
Isopropyl Ether 108-20-3 mg/L 20 NCDEQ -- -- 2 0 2 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Isopropylbenzene (Cumene)98-82-8 mg/L 0.25 NCDEQ -- -- 2 0 2 0.0016 0.0016 --0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/L 0.42 See Notes -- -- 2 0 2 0.0031 0.0031 --0.0031 0.0031 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Ethyl Ketone 78-93-3 mg/L 26 NCDEQ -- -- 2 0 2 0.0049 0.0049 --0.0049 0.0049 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/L 26 NCDEQ -- -- 2 0 2 0.0036 0.0036 --0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/L 11 NCDEQ -- -- 3 0 3 0.0019 0.0019 --0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/L 0.0039 NCDEQ -- -- 2 0 2 0.0019 0.0019 --0.0019 0.0019 0 0 0.5 0.5 No COPEC: QL<ESV
N-Propylbenzene 103-65-1 mg/L 0.08 NCDEQ -- -- 2 0 2 0.0015 0.0015 --0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 2 0 2 0.002 0.002 --0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene)95-47-6 mg/L 0.6 NCDEQ -- -- 2 0 2 0.0016 0.0016 --0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
p-Cymene (p-Isopropyltoluene)99-87-6 mg/L 0.32 NCDEQ -- -- 2 0 2 0.0016 0.0016 --0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/L ------ -- 2 0 2 0.0017 0.0017 --0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/L 0.032 USEPA R4 -- -- 2 0 2 0.0016 0.0016 --0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/L ------ -- 2 0 2 0.0016 0.0016 --0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Alcohol 75-65-0 mg/L ------ -- 2 0 2 0.0577 0.0577 --0.0577 0.0577 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/L 34 NCDEQ -- -- 2 0 2 0.0017 0.0017 --0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/L 0.053 USEPA R4 -- -- 3 0 3 0.0018 0.0018 --0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/L 0.011 NCDEQ -- -- 3 0 3 0.0016 0.0016 --0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/L 0.558 USEPA R4 -- -- 3 0 3 0.0018 0.0018 --0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/L 0.0017 USEPA R4 -- -- 3 0 3 0.0016 0.0016 --0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Trichloroethylene 79-01-6 mg/L 0.22 USEPA R4 -- -- 4 0 4 0.0008 0.0018 --0.0018 0.00155 0 0 0.0 0.0 No COPEC: QL<ESV
Trichlorofluoromethane 75-69-4 mg/L ------ -- 3 0 3 0.0017 0.0017 --0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/L 0.016 USEPA R4 -- -- 2 0 2 0.0023 0.0023 --0.0023 0.0023 0 0 0.1 0.1 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/L 0.93 USEPA R4 -- -- 3 0 3 0.0015 0.0015 --0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
General Chemistry
Alkalinity, Bicarbonate (As CaCO3)ALKB mg/L ----42 41 4 4 0 5 5 ABL-SW009(+50), ABL-SW008 42 41.5 0 0 -- -- Category 3: No ESV & Detect
Alkalinity, Carbonate (As CaCO3)ALKC mg/L ------ -- 4 0 4 5 5 --5 5 0 0 -- -- Category 4: No ESV & ND
Alkalinity, Total (As CaCO3)ALK mg/L 20 USEPA R4 42 41 4 4 0 5 5 ABL-SW009(+50), ABL-SW008, ABL-SW008(+100)42 41.75 4 4 2.1 2.1 Category 1/5: Max EPC>ESV
9 of 10
Table C-1
Summary Surface Water Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected Concentrations Sample Count Quantitation
Limits
Location of Max
Values for Screening
UnitsChemical Name CAS RN
Bromide 24959-67-9 mg/L ----0.41 0.41 4 1 3 0.4 0.4 ABL-SW009(-50)0.41 0.4025 0 0 -- -- Category 3: No ESV & Detect
Chloride (As Cl)16887-00-6 mg/L 230 NCDEQ 6.2 5.5 8 8 0 0.18 0.4 ABL-SW009(-50)6.2 5.8125 0 0 0.0 0.0 No COPEC: EPC<ESV
Hardness (As CaCO3)HARD mg/L ----48 47 4 4 0 3.3 3.3 ABL-SW009(+50), ABL-SW008, ABL-SW008(+100)48 47.75 0 0 -- -- Category 3: No ESV & Detect
pH PH SU 20 USEPA R4 7.6 7.5 4 4 0 -- --ABL-SW008 7.6 7.525 0 0 0.4 0.4 No COPEC: EPC<ESV
Sulfate (As SO4)14808-79-8 mg/L ----6.3 4.4 4 4 0 0.8 0.8 ABL-SW008(+100)6.3 5.05 0 0 -- -- Category 3: No ESV & Detect
Total Hardness TOTHARD mg/L ----37.8 15.4 20 20 0 0.662 0.662 ABL-SW008 37.8 22.155 0 0 -- -- Category 3: No ESV & Detect
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
10 of 10
Table C-2
Summary Sediment Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 0.54 0.17 2 2 0 0.11 0.17 ABL-SD001 0.54 0.355 0 0 -- -- Category 3: No ESV & Detect
Fluoride 16984-48-8 mg/kg -- -- -- -- 2 0 2 14.2 14.8 --14.8 14.5 0 0 -- -- Category 4: No ESV & ND
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 14.9 8.4 2 2 0 0.33 0.37 ABL-SD002 14.9 11.65 0 0 0.5 0.4 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 58.4 33.1 2 2 0 0.17 0.18 ABL-SD002 58.4 45.75 0 0 1.0 0.8 No COPEC: EPC<ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.23 0.16 2 2 0 0.033 0.037 ABL-SD002 0.23 0.195 0 0 0.0 0.0 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 79.5 66.7 2 2 0 0.17 0.18 ABL-SD002 79.5 73.1 0 0 0.7 0.7 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 20 12.7 2 2 0 0.17 0.18 ABL-SD002 20 16.35 0 0 0.2 0.1 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.014 0.0087 2 2 0 0.0001 0.00011 ABL-SD002 0.014 0.01135 0 0 0.0 0.0 No COPEC: EPC<ESV
Selenium 7782-49-2 mg/kg 2.9 EPA R4 RSV -- -- 2 0 2 0.33 0.37 --0.37 0.35 0 0 0.1 0.1 No COPEC: QL<ESV
Silver 7440-22-4 mg/kg 2.2 EPA R4 RSV 0.59 0.42 2 2 0 0.17 0.18 ABL-SD002 0.59 0.505 0 0 0.3 0.2 No COPEC: EPC<ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016)12674-11-2 mg/kg -- -- -- -- 3 0 3 0.0172 0.0176 --0.0176 0.017333333 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221)11104-28-2 mg/kg -- -- -- -- 3 0 3 0.0172 0.0176 --0.0176 0.017333333 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232)11141-16-5 mg/kg -- -- -- -- 3 0 3 0.0172 0.0176 --0.0176 0.017333333 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242)53469-21-9 mg/kg -- -- -- -- 3 0 3 0.0172 0.0176 --0.0176 0.017333333 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248)12672-29-6 mg/kg -- -- -- -- 3 0 3 0.0172 0.0176 --0.0176 0.017333333 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254)11097-69-1 mg/kg -- -- -- -- 3 0 3 0.0172 0.0176 --0.0176 0.017333333 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260)11096-82-5 mg/kg -- -- -- -- 3 0 3 0.0172 0.0176 --0.0176 0.017333333 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors)totPCB_ND=0 mg/kg 0.676 EPA R4 RSV -- -- 3 0 3 0.1204 0.1232 --0.1232 0 0 0 0.2 0.0 No COPEC: QL<ESV
Total PCBs (Aroclors)totPCB_ND=QL/2 mg/kg 0.676 EPA R4 RSV -- -- 3 0 3 0.1204 0.1232 --0.1232 0.060666667 0 0 0.2 0.1 No COPEC: QL<ESV
Total PCBs (Aroclors)totPCB_ND=LOD mg/kg 0.676 EPA R4 RSV -- -- 3 0 3 0.1204 0.1232 --0.1232 0.121333333 0 0 0.2 0.2 No COPEC: QL<ESV
Chlorobiphenyl; 2- (PCB 1)2051-60-7 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 3- (PCB 2)2051-61-8 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 4- (PCB 3)2051-62-9 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,2'- (PCB 4)13029-08-8 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3- (PCB 5)16605-91-7 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3'- (PCB 6)25569-80-6 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4- (PCB 7)33284-50-3 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4'- (PCB 8)34883-43-7 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,5- (PCB 9)34883-39-1 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,6- (PCB 10)33146-45-1 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,3'- (PCB 11)2050-67-1 mg/kg -- -- -- -- 1 0 1 0.000238 0.000238 --0.000238 0.000238 0 0 -- -- Category 4: No ESV & ND
PCB 12/13 E52450566 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,5- (PCB 14)34883-41-5 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 4,4'- (PCB 15)2050-68-2 mg/kg -- -- -- -- 1 0 1 0.000032 0.000032 --0.000032 0.000032 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',3- (PCB 16)38444-78-9 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',4- (PCB 17)37680-66-3 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
PCB 18/30 E52450574 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',6- (PCB 19)38444-73-4 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
PCB 20/28 E52450582 mg/kg -- -- 0.000165 0.000165 1 1 0 0.000125 0.000125 ABL-SD007 0.000165 0.000165 0 0 -- -- Category 3: No ESV & Detect
PCB 21/33 E52450590 mg/kg -- -- -- -- 1 0 1 0.000131 0.000131 --0.000131 0.000131 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,4'- (PCB 22)38444-85-8 mg/kg -- -- -- -- 1 0 1 0.0000922 0.0000922 --0.0000922 0.0000922 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,5- (PCB 23)55720-44-0 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,6- (PCB 24)55702-45-9 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',4- (PCB 25)55712-37-3 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
1 of 8
Table C-2
Summary Sediment Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
PCB 26/29 E52450608 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',6- (PCB 27)38444-76-7 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4',5- (PCB 31)16606-02-3 mg/kg -- -- 0.00018 0.00018 1 1 0 0.000126 0.000126 ABL-SD007 0.00018 0.00018 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,4',6- (PCB 32)38444-77-8 mg/kg -- -- 2.57E-05 2.57E-05 1 1 0 0.0000243 0.0000243 ABL-SD007 0.0000257 0.0000257 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2',3,5- (PCB 34)37680-68-5 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',4- (PCB 35)37680-69-6 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',5- (PCB 36)38444-87-0 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,4'- (PCB 37)38444-90-5 mg/kg -- -- 8.18E-05 8.18E-05 1 1 0 0.0000515 0.0000515 ABL-SD007 0.0000818 0.0000818 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 3,4,5- (PCB 38)53555-66-1 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4',5- (PCB 39)38444-88-1 mg/kg -- -- -- -- 1 0 1 0.0000243 0.0000243 --0.0000243 0.0000243 0 0 -- -- Category 4: No ESV & ND
PCB 40/41/71 E52450616 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 --0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42)36559-22-5 mg/kg -- -- 6.66E-05 6.66E-05 1 1 0 0.0000485 0.0000485 ABL-SD007 0.0000666 0.0000666 0 0 -- -- Category 3: No ESV & Detect
PCB 43/73 (43/73) mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 44/47/65 E52450624 mg/kg -- -- 0.000215 0.000215 1 1 0 0.000146 0.000146 ABL-SD007 0.000215 0.000215 0 0 -- -- Category 3: No ESV & Detect
PCB 45/51 E52450632 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46)41464-47-5 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48)70362-47-9 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 49/69 E52450640 mg/kg -- -- 0.000161 0.000161 1 1 0 0.0000971 0.0000971 ABL-SD007 0.000161 0.000161 0 0 -- -- Category 3: No ESV & Detect
PCB 50/53 E52450657 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52)35693-99-3 mg/kg -- -- 0.000249 0.000249 1 1 0 0.00015 0.00015 ABL-SD007 0.000249 0.000249 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54)15968-05-5 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55)74338-24-2 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56)41464-43-1 mg/kg -- -- 0.000226 0.000226 1 1 0 0.0000485 0.0000485 ABL-SD007 0.000226 0.000226 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57)70424-67-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58)41464-49-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 59/62/75 E52450665 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 --0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60)33025-41-1 mg/kg -- -- 0.00014 0.00014 1 1 0 0.0000485 0.0000485 ABL-SD007 0.00014 0.00014 0 0 -- -- Category 3: No ESV & Detect
PCB 61/70/74/76 E52450673 mg/kg -- -- 0.000886 0.000886 1 1 0 0.000194 0.000194 ABL-SD007 0.000886 0.000886 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63)74472-34-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64)52663-58-8 mg/kg -- -- 0.00018 0.00018 1 1 0 0.0000485 0.0000485 ABL-SD007 0.00018 0.00018 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66)32598-10-0 mg/kg -- -- 0.000468 0.000468 1 1 0 0.0000815 0.0000815 ABL-SD007 0.000468 0.000468 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67)73575-53-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68)73575-52-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72)41464-42-0 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73)74338-23-1 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77)32598-13-3 mg/kg -- -- 0.000105 0.000105 1 1 0 0.0000485 0.0000485 ABL-SD007 0.000105 0.000105 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78)70362-49-1 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79)41464-48-6 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80)33284-52-5 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81)70362-50-4 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82)52663-62-4 mg/kg -- -- 5.13E-05 5.13E-05 1 1 0 0.0000485 0.0000485 ABL-SD007 0.0000513 0.0000513 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83)60145-20-2 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84)52663-60-2 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 85/117/116 E52450699 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 --0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
PCB 86/87/97/108/119/125 E52450707 mg/kg -- -- -- -- 1 0 1 0.000291 0.000291 --0.000291 0.000291 0 0 -- -- Category 4: No ESV & ND
PCB 88/91 E52450715 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89)73575-57-2 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
2 of 8
Table C-2
Summary Sediment Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
PCB 90/101/113 E52450723 mg/kg -- -- 0.000191 0.000191 1 1 0 0.000146 0.000146 ABL-SD007 0.000191 0.000191 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92)52663-61-3 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 93/98/100/102 (93/98/100/102) mg/kg -- -- -- -- 1 0 1 0.000194 0.000194 --0.000194 0.000194 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94)73575-55-0 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95)38379-99-6 mg/kg -- -- 0.000106 0.000106 1 1 0 0.0000922 0.0000922 ABL-SD007 0.000106 0.000106 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96)73575-54-9 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99)38380-01-7 mg/kg -- -- 0.000129 0.000129 1 1 0 0.0000485 0.0000485 ABL-SD007 0.000129 0.000129 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103)60145-21-3 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104)56558-16-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105)32598-14-4 mg/kg -- -- 0.000232 0.000232 1 1 0 0.0000485 0.0000485 ABL-SD007 0.000232 0.000232 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106)70424-69-0 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 107/124 E52450749 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109)74472-35-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 110/115 E52450756 mg/kg -- -- 0.000335 0.000335 1 1 0 0.0000971 0.0000971 ABL-SD007 0.000335 0.000335 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111)39635-32-0 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112)74472-36-9 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114)74472-37-0 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118)31508-00-6 mg/kg -- -- 0.000354 0.000354 1 1 0 0.0000621 0.0000621 ABL-SD007 0.000354 0.000354 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120)68194-12-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121)56558-18-0 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122)76842-07-4 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123)65510-44-3 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126)57465-28-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127)39635-33-1 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 128/166 E52450764 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
PCB 129/138/163 (129/138/163) mg/kg -- -- 0.000249 0.000249 1 1 0 0.000146 0.000146 ABL-SD007 0.000249 0.000249 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130)52663-66-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131)61798-70-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132)38380-05-1 mg/kg -- -- 5.56E-05 5.56E-05 1 1 0 0.0000485 0.0000485 ABL-SD007 0.0000556 0.0000556 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133)35694-04-3 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 134/143 E52450780 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
PCB 135/151 (135/151) mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136)38411-22-2 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137)35694-06-5 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 139/140 E52450806 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141)52712-04-6 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142)41411-61-4 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144)68194-14-9 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145)74472-40-5 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146)51908-16-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 147/149 E52450814 mg/kg -- -- 0.000161 0.000161 1 1 0 0.0000971 0.0000971 ABL-SD007 0.000161 0.000161 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148)74472-41-6 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150)68194-08-1 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152)68194-09-2 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 153/168 E52450822 mg/kg -- -- 0.000196 0.000196 1 1 0 0.0000971 0.0000971 ABL-SD007 0.000196 0.000196 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154)60145-22-4 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155)33979-03-2 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
3 of 8
Table C-2
Summary Sediment Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
PCB 156/157 E52450830 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158)74472-42-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159)39635-35-3 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160)41411-62-5 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161)74472-43-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162)39635-34-2 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164)74472-45-0 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165)74472-46-1 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167)52663-72-6 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169)32774-16-6 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170)35065-30-6 mg/kg -- -- 6.49E-05 6.49E-05 1 1 0 0.0000485 0.0000485 ABL-SD007 0.0000649 0.0000649 0 0 -- -- Category 3: No ESV & Detect
PCB 171/173 E52450848 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172)52663-74-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174)38411-25-5 mg/kg -- -- 8.22E-05 8.22E-05 1 1 0 0.0000485 0.0000485 ABL-SD007 0.0000822 0.0000822 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175)40186-70-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176)52663-65-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177)52663-70-4 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178)52663-67-9 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179)52663-64-6 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 180/193 E52450855 mg/kg -- -- 0.000165 0.000165 1 1 0 0.0000971 0.0000971 ABL-SD007 0.000165 0.000165 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181)74472-47-2 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182)60145-23-5 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
PCB 183/185 E52450863 mg/kg -- -- -- -- 1 0 1 0.0000971 0.0000971 --0.0000971 0.0000971 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184)74472-48-3 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186)74472-49-4 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187)52663-68-0 mg/kg -- -- 0.000101 0.000101 1 1 0 0.0000485 0.0000485 ABL-SD007 0.000101 0.000101 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188)74487-85-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189)39635-31-9 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190)41411-64-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191)74472-50-7 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192)74472-51-8 mg/kg -- -- -- -- 1 0 1 0.0000485 0.0000485 --0.0000485 0.0000485 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194)35694-08-7 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195)52663-78-2 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196)42740-50-1 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
PCB 197/200 E52450871 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 --0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
PCB 198/199 E52450889 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 --0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201)40186-71-8 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202)2136-99-4 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203)52663-76-0 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204)74472-52-9 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205)74472-53-0 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206)40186-72-9 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207)52663-79-3 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208)52663-77-1 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Decachlorobiphenyl (PCB 209)2051-24-3 mg/kg -- -- -- -- 1 0 1 0.0000728 0.0000728 --0.0000728 0.0000728 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Congeners)totPCB_congener_ND=0 mg/kg 0.676 EPA R4 RSV 0.005622 0.005622 1 1 0 0.0103554 0.0103554 ABL-SD007 0.0103554 0.0056221 0 0 0.0 0.0 No COPEC: EPC<ESV
Total PCBs (Congeners)totPCB_congener_ND=QL/2 mg/kg 0.676 EPA R4 RSV 0.009594 0.009594 1 1 0 0.0103554 0.0103554 ABL-SD007 0.0103554 0.00959375 0 0 0.0 0.0 No COPEC: EPC<ESV
4 of 8
Table C-2
Summary Sediment Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Total PCBs (Congeners)totPCB_congener_ND=LOD mg/kg 0.676 EPA R4 RSV 0.013565 0.013565 1 1 0 0.0103554 0.0103554 ABL-SD007 0.0135654 0.0135654 0 0 0.0 0.0 No COPEC: EPC<ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg 9.82 EPA R4 RSV -- -- 3 0 3 0.0017 0.089 --0.089 0.059266667 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/kg 9.04 EPA R4 RSV -- -- 3 0 3 0.0015 0.0914 --0.0914 0.060766667 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/kg 11.88 EPA R4 RSV -- -- 3 0 3 0.0016 0.0867 --0.0867 0.0577 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/kg 16.82 EPA R4 RSV -- -- 3 0 3 0.0008 0.0715 --0.0715 0.0474 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[a]pyrene 50-32-8 mg/kg 19.3 EPA R4 RSV -- -- 3 0 3 0.0012 0.0738 --0.0738 0.049066667 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[b]fluoranthene 205-99-2 mg/kg 19.58 EPA R4 RSV -- -- 3 0 3 0.00076 0.0668 --0.0668 0.044286667 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[g,h,i]perylene 191-24-2 mg/kg 21.8 EPA R4 RSV -- -- 3 0 3 0.0029 0.0984 --0.0984 0.065833333 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[k]fluoranthene 207-08-9 mg/kg 19.62 EPA R4 RSV -- -- 3 0 3 0.0017 0.0762 --0.0762 0.0508 0 0 0.0 0.0 No COPEC: QL<ESV
Chrysene 218-01-9 mg/kg 16.88 EPA R4 RSV -- -- 3 0 3 0.002 0.0516 --0.0516 0.034666667 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/kg 22.4 EPA R4 RSV -- -- 3 0 3 0.002 0.082 --0.082 0.054733333 0 0 0.0 0.0 No COPEC: QL<ESV
Fluoranthene 206-44-0 mg/kg 14.14 EPA R4 RSV -- -- 3 0 3 0.00094 0.0562 --0.0562 0.03738 0 0 0.0 0.0 No COPEC: QL<ESV
Fluorene 86-73-7 mg/kg 10.76 EPA R4 RSV -- -- 3 0 3 0.0018 0.0797 --0.0797 0.053133333 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg 22.4 EPA R4 RSV -- -- 3 0 3 0.0032 0.0797 --0.0797 0.0536 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV -- -- 3 0 3 0.0026 0.0949 --0.0949 0.063433333 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/kg 11.92 EPA R4 RSV -- -- 3 0 3 0.0017 0.0644 --0.0644 0.043033333 0 0 0.0 0.0 No COPEC: QL<ESV
Pyrene 129-00-0 mg/kg 13.94 EPA R4 RSV -- -- 3 0 3 0.002 0.0656 --0.0656 0.0439 0 0 0.0 0.0 No COPEC: QL<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/kg -- -- -- -- 3 0 3 0.01656 0.6656 --0.6656 0 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg -- -- -- -- 3 0 3 0.01656 0.6656 --0.6656 0.222143333 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg -- -- -- -- 3 0 3 0.01656 0.6656 --0.6656 0.444286667 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg -- -- -- -- 3 0 3 0.01184 0.5623 --0.5623 0 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg -- -- -- -- 3 0 3 0.01184 0.5623 --0.5623 0.187356667 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg -- -- -- -- 3 0 3 0.01184 0.5623 --0.5623 0.374713333 0 0 -- -- Category 4: No ESV & ND
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg 8.92 EPA R4 RSV -- -- 3 0 3 0.0014 0.101 --0.101 0.066966667 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 2 0 2 0.101 0.103 --0.103 0.102 0 0 0.1 0.1 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 2 0 2 0.0733 0.075 --0.075 0.07415 0 0 0.1 0.1 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 2 0 2 0.0859 0.0879 --0.0879 0.0869 0 0 0.1 0.1 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 2 0 2 0.107 0.109 --0.109 0.108 0 0 0.1 0.1 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/kg -- -- -- -- 2 0 2 0.0745 0.0762 --0.0762 0.07535 0 0 -- -- Category 4: No ESV & ND
2-Chlorophenol 95-57-8 mg/kg 0.55 EPA R4 RSV -- -- 2 0 2 0.103 0.105 --0.105 0.104 0 0 0.2 0.2 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/kg 8.94 EPA R4 RSV -- -- 3 0 3 0.0012 0.0832 --0.0832 0.055233333 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol)95-48-7 mg/kg 3.546 EPA R4 RSV -- -- 2 0 2 0.115 0.117 --0.117 0.116 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/kg -- -- -- -- 2 0 2 0.117 0.12 --0.12 0.1185 0 0 -- -- Category 4: No ESV & ND
2-Nitrophenol 88-75-5 mg/kg 7.178 EPA R4 RSV -- -- 2 0 2 0.0916 0.0937 --0.0937 0.09265 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/kg 3.772 EPA R4 RSV -- -- 2 0 2 0.0825 0.0844 --0.0844 0.08345 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/kg 2.874 EPA R4 RSV -- -- 2 0 2 0.149 0.152 --0.152 0.1505 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/kg 5.922 EPA R4 RSV -- -- 2 0 2 0.0619 0.0633 --0.0633 0.0626 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/kg 2.9 EPA R4 RSV -- -- 2 0 2 0.071 0.0726 --0.0726 0.0718 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/kg 3.928 EPA R4 RSV -- -- 2 0 2 0.117 0.12 --0.12 0.1185 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,6-Trichlorophenol 88-06-2 mg/kg 3.928 EPA R4 RSV -- -- 2 0 2 0.0836 0.0855 --0.0855 0.08455 0 0 0.0 0.0 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/kg 0.262 EPA R4 RSV -- -- 2 0 2 0.079 0.0808 --0.0808 0.0799 0 0 0.3 0.3 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/kg -- -- -- -- 2 0 2 0.149 0.152 --0.152 0.1505 0 0 -- -- Category 4: No ESV & ND
3-Nitroaniline 99-09-2 mg/kg -- -- -- -- 2 0 2 0.103 0.105 --0.105 0.104 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/kg 0.18 EPA R4 RSV -- -- 2 0 2 0.0825 0.0844 --0.0844 0.08345 0 0 0.5 0.5 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/kg 0.124 EPA R4 RSV -- -- 2 0 2 0.0687 0.0703 --0.0703 0.0695 0 0 0.6 0.6 No COPEC: QL<ESV
5 of 8
Table C-2
Summary Sediment Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
4-Chloro-3-Methylphenol 59-50-7 mg/kg 4.07 EPA R4 RSV -- -- 2 0 2 0.0779 0.0797 --0.0797 0.0788 0 0 0.0 0.0 No COPEC: QL<ESV
4-Chloroaniline 106-47-8 mg/kg 0.042 EPA R4 RSV -- -- 2 0 2 0.105 0.108 --0.108 0.1065 0 2 2.6 2.5 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/kg -- -- -- -- 2 0 2 0.0779 0.0797 --0.0797 0.0788 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/kg -- -- -- -- 2 0 2 0.107 0.109 --0.109 0.108 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/kg 8.21 EPA R4 RSV -- -- 2 0 2 0.0676 0.0691 --0.0691 0.06835 0 0 0.0 0.0 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/kg 4.608 EPA R4 RSV -- -- 2 0 2 0.0756 0.0773 --0.0773 0.07645 0 0 0.0 0.0 No COPEC: QL<ESV
Aniline (Phenylamine, Aminobenzene)62-53-3 mg/kg 0.024 EPA R4 RSV -- -- 2 0 2 0.102 0.104 --0.104 0.103 0 2 4.3 4.3 Category 2: QL>ESV
Benzoic acid 65-85-0 mg/kg 4 EPA R4 RSV -- -- 2 0 2 0.0687 0.0703 --0.0703 0.0695 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Alcohol 100-51-6 mg/kg 13.458 EPA R4 RSV -- -- 2 0 2 0.0756 0.0773 --0.0773 0.07645 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/kg 0.962 EPA R4 RSV -- -- 2 0 2 0.0802 0.082 --0.082 0.0811 0 0 0.1 0.1 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/kg -- -- -- -- 2 0 2 0.0882 0.0902 --0.0902 0.0892 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether)111-44-4 mg/kg 16.326 EPA R4 RSV -- -- 2 0 2 0.0962 0.0984 --0.0984 0.0973 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/kg -- -- -- -- 2 0 2 0.101 0.103 --0.103 0.102 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/kg 5.2 EPA R4 RSV -- -- 2 0 2 0.103 0.105 --0.105 0.104 0 0 0.0 0.0 No COPEC: QL<ESV
Di-N-Butyl Phthalate 84-74-2 mg/kg 0.638 EPA R4 RSV -- -- 2 0 2 0.0619 0.0633 --0.0633 0.0626 0 0 0.1 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/kg 2.2 EPA R4 RSV -- -- 2 0 2 0.079 0.0808 --0.0808 0.0799 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/kg 4.626 EPA R4 RSV -- -- 2 0 2 0.0619 0.0633 --0.0633 0.0626 0 0 0.0 0.0 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/kg 2.21 EPA R4 RSV -- -- 2 0 2 0.0584 0.0598 --0.0598 0.0591 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/kg 4.062 EPA R4 RSV -- -- 2 0 2 0.0767 0.0785 --0.0785 0.0776 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/kg 0.48 EPA R4 RSV -- -- 2 0 2 0.0481 0.0492 --0.0492 0.04865 0 0 0.1 0.1 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 2 0 2 0.0653 0.0668 --0.0668 0.06605 0 0 -- -- Category 4: No ESV & ND
Hexachlorocyclopentadiene 77-47-4 mg/kg 0.81 EPA R4 RSV -- -- 2 0 2 0.0699 0.0715 --0.0715 0.0707 0 0 0.1 0.1 No COPEC: QL<ESV
Hexachloroethane 67-72-1 mg/kg 0.15 EPA R4 RSV -- -- 2 0 2 0.0997 0.102 --0.102 0.10085 0 0 0.7 0.7 No COPEC: QL<ESV
Isophorone 78-59-1 mg/kg 1.896 EPA R4 RSV -- -- 2 0 2 0.0848 0.0867 --0.0867 0.08575 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/kg -- -- -- -- 2 0 2 0.0722 0.0738 --0.0738 0.073 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/kg -- -- -- -- 2 0 2 0.123 0.125 --0.125 0.124 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodiphenylamine 86-30-6 mg/kg 0.74 EPA R4 RSV -- -- 2 0 2 0.112 0.115 --0.115 0.1135 0 0 0.2 0.2 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/kg 18.014 EPA R4 RSV -- -- 2 0 2 0.103 0.105 --0.105 0.104 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/kg 1.2 EPA R4 RSV -- -- 2 0 2 0.0687 0.0703 --0.0703 0.0695 0 0 0.1 0.1 No COPEC: QL<ESV
Phenol 108-95-2 mg/kg 0.21 EPA R4 RSV -- -- 2 0 2 0.113 0.116 --0.116 0.1145 0 0 0.6 0.5 No COPEC: QL<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/kg 3.332 EPA R4 RSV -- -- 2 0 2 0.0014 0.0015 --0.0015 0.00145 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/kg 1.506 EPA R4 RSV -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/kg -- -- -- -- 2 0 2 0.0014 0.0015 --0.0015 0.00145 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/kg 0.734 EPA R4 RSV -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/kg 0.836 EPA R4 RSV -- -- 2 0 2 0.002 0.0022 --0.0022 0.0021 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/kg 3.09 EPA R4 RSV -- -- 2 0 2 0.002 0.0022 --0.0022 0.0021 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/kg 4.46 EPA R4 RSV -- -- 2 0 2 0.0018 0.0019 --0.0019 0.00185 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/kg -- -- -- -- 2 0 2 0.0034 0.0037 --0.0037 0.00355 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide)106-93-4 mg/kg -- -- -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 2 0 2 0.0018 0.0019 --0.0019 0.00185 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/kg 2.262 EPA R4 RSV -- -- 2 0 2 0.0021 0.0023 --0.0023 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/kg 1.752 EPA R4 RSV -- -- 2 0 2 0.0016 0.0017 --0.0017 0.00165 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/kg 0.99 EPA R4 RSV -- -- 2 0 2 0.0021 0.0023 --0.0023 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/kg -- -- -- -- 2 0 2 0.0015 0.0016 --0.0016 0.00155 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 2 0 2 0.0015 0.0016 --0.0016 0.00155 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/kg 0.722 EPA R4 RSV -- -- 2 0 2 0.0019 0.002 --0.002 0.00195 0 0 0.0 0.0 No COPEC: QL<ESV
6 of 8
Table C-2
Summary Sediment Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 2 0 2 0.0019 0.002 --0.002 0.00195 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/kg -- -- -- -- 2 0 2 0.0018 0.0019 --0.0019 0.00185 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene)108-67-8 mg/kg 0.708 EPA R4 RSV -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 2 0 2 0.0016 0.0017 --0.0017 0.00165 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorotoluene 95-49-8 mg/kg -- -- -- -- 2 0 2 0.0016 0.0017 --0.0017 0.00165 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/kg 15.196 EPA R4 RSV -- -- 2 0 2 0.0036 0.004 --0.004 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/kg -- -- -- -- 2 0 2 0.0016 0.0017 --0.0017 0.00165 0 0 -- -- Category 4: No ESV & ND
4-Chlorotoluene 106-43-4 mg/kg -- -- -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/kg 76.266 EPA R4 RSV -- -- 2 0 2 0.0093 0.0102 --0.0102 0.00975 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/kg 4.37 EPA R4 RSV -- -- 2 0 2 0.0015 0.0016 --0.0016 0.00155 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/kg -- -- -- -- 2 0 2 0.0019 0.002 --0.002 0.00195 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/kg -- -- -- -- 2 0 2 0.0016 0.0017 --0.0017 0.00165 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/kg 0.42 EPA R4 ESV -- -- 2 0 2 0.0018 0.0019 --0.0019 0.00185 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/kg 0.284 EPA R4 ESV -- -- 2 0 2 0.0021 0.0024 --0.0024 0.00225 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/kg 0.013 EPA R4 ESV -- -- 2 0 2 0.0023 0.0026 --0.0026 0.00245 0 0 0.2 0.2 No COPEC: QL<ESV
Carbon Tetrachloride 56-23-5 mg/kg 1.412 EPA R4 RSV -- -- 2 0 2 0.0024 0.0027 --0.0027 0.00255 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/kg 1.878 EPA R4 RSV -- -- 2 0 2 0.0018 0.0019 --0.0019 0.00185 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/kg -- -- -- -- 2 0 2 0.0022 0.0025 --0.0025 0.00235 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/kg 6.704 EPA R4 RSV -- -- 2 0 2 0.0015 0.0016 --0.0016 0.00155 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/kg -- -- -- -- 2 0 2 0.0022 0.0025 --0.0025 0.00235 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/kg 2.27 EPA R4 RSV -- -- 2 0 2 0.0013 0.0014 --0.0014 0.00135 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/kg -- -- -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 -- -- Category 4: No ESV & ND
Dibromochloromethane 124-48-1 mg/kg 0.396 EPA R4 ESV -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/kg -- -- -- -- 2 0 2 0.0023 0.0026 --0.0026 0.00245 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/kg -- -- -- -- 2 0 2 0.0034 0.0037 --0.0037 0.00355 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/kg 2.934 EPA R4 RSV -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 2 0 2 0.0019 0.002 --0.002 0.00195 0 0 -- -- Category 4: No ESV & ND
Isopropyl Ether 108-20-3 mg/kg -- -- -- -- 2 0 2 0.0016 0.0017 --0.0017 0.00165 0 0 -- -- Category 4: No ESV & ND
Isopropylbenzene (Cumene)98-82-8 mg/kg 1.426 EPA R4 RSV -- -- 2 0 2 0.0018 0.0019 --0.0019 0.00185 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/kg -- -- -- -- 2 0 2 0.0034 0.0037 --0.0037 0.00355 0 0 -- -- Category 4: No ESV & ND
Methyl Ethyl Ketone 78-93-3 mg/kg 45.414 EPA R4 RSV -- -- 2 0 2 0.0027 0.003 --0.003 0.00285 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/kg 16.33 EPA R4 RSV -- -- 2 0 2 0.0035 0.0038 --0.0038 0.00365 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/kg 4.808 EPA R4 RSV -- -- 2 0 2 0.0028 0.0031 --0.0031 0.00295 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/kg -- -- -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 -- -- Category 4: No ESV & ND
N-Propylbenzene 103-65-1 mg/kg -- -- -- -- 2 0 2 0.0016 0.0017 --0.0017 0.00165 0 0 -- -- Category 4: No ESV & ND
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV -- -- 2 0 2 0.0011 0.0012 --0.0012 0.00115 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene)95-47-6 mg/kg -- -- -- -- 2 0 2 0.0018 0.0019 --0.0019 0.00185 0 0 -- -- Category 4: No ESV & ND
p-Cymene (p-Isopropyltoluene)99-87-6 mg/kg 0.484 EPA R4 RSV -- -- 2 0 2 0.0016 0.0017 --0.0017 0.00165 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/kg -- -- -- -- 2 0 2 0.0015 0.0016 --0.0016 0.00155 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/kg 3.242 EPA R4 RSV -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 0.0 0.0 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/kg -- -- -- -- 2 0 2 0.0019 0.002 --0.002 0.00195 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/kg 8.866 EPA R4 RSV -- -- 2 0 2 0.0014 0.0015 --0.0015 0.00145 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/kg 0.83 EPA R4 RSV -- -- 2 0 2 0.0016 0.0017 --0.0017 0.00165 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/kg 4.148 EPA R4 RSV -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/kg 2.27 EPA R4 RSV -- -- 2 0 2 0.0018 0.0019 --0.0019 0.00185 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/kg -- -- -- -- 2 0 2 0.0014 0.0015 --0.0015 0.00145 0 0 -- -- Category 4: No ESV & ND
Trichloroethylene 79-01-6 mg/kg 1.384 EPA R4 RSV -- -- 2 0 2 0.002 0.0022 --0.0022 0.0021 0 0 0.0 0.0 No COPEC: QL<ESV
7 of 8
Table C-2
Summary Sediment Screening - Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Trichlorofluoromethane 75-69-4 mg/kg -- -- -- -- 2 0 2 0.0021 0.0023 --0.0023 0.0022 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/kg 4.46 EPA R4 RSV -- -- 2 0 2 0.0082 0.009 --0.009 0.0086 0 0 0.0 0.0 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/kg 2.356 EPA R4 RSV -- -- 2 0 2 0.0017 0.0018 --0.0018 0.00175 0 0 0.0 0.0 No COPEC: QL<ESV
Xylenes 1330-20-7 mg/kg 2.148 EPA R4 RSV -- -- 2 0 2 0.0034 0.0037 --0.0037 0.00355 0 0 0.0 0.0 No COPEC: QL<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 14.6 11.2 3 3 0 0.1 0.1 ABL-SD001 14.6 12.83333333 0 0 -- -- Category 3: No ESV & Detect
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
RSV - Refined screening value
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
8 of 8
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/L 0.005 NCDEQ -- -- 9 0 9 0.002 0.004 -- 0.004 0.003556 0 0 0.8 0.7 No COPEC: QL<ESV
Cyanide, Available 57-12-5_AVAIL mg/L 0.005 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.3 0.3 No COPEC: QL<ESV
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 0.082 0.061 8 3 5 0.05 0.25 ABL-SW012 0.25 0.10425 0 0 0.1 0.1 No COPEC: EPC<ESV
Metals
Antimony 7440-36-0 mg/L 5.3 NCDEQ -- -- 1 0 1 0.0039 0.0039 -- 0.0039 0.0039 0 0 0.0 0.0 No COPEC: QL<ESV
Arsenic 7440-38-2 mg/L 0.15 NCDEQ -- -- 7 0 7 0.005 0.005 -- 0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.01 0.01 1 1 0 0.0025 0.0025 ABL-SW003 0.01 0.01 0 0 0.0 0.0 No COPEC: EPC<ESV
Beryllium 7440-41-7 mg/L 0.0065 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 0 0.0 0.0 No COPEC: QL<ESV
Cadmium 7440-43-9 mg/L 0.000413 See Notes -- -- 2 0 2 0.0005 0.0005 -- 0.0005 0.0005 0 2 1.2 1.2 Category 2: QL>ESV
Calcium 7440-70-2 mg/L 116 USEPA R4 11 11 1 1 0 0.025 0.025 ABL-SW012 11 11 0 0 0.1 0.1 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/L 0.04063 See Notes 0.0033 0.0033 2 1 1 0.0025 0.0025 ABL-SW003 0.0033 0.0029 0 0 0.1 0.1 No COPEC: EPC<ESV
Copper 7440-50-8 mg/L 0.00478 See Notes -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.5 0.5 No COPEC: QL<ESV
Lead 7439-92-1 mg/L 0.00112 See Notes -- -- 7 0 7 0.0025 0.0025 -- 0.0025 0.0025 0 7 2.2 2.2 Category 2: QL>ESV
Magnesium 7439-95-4 mg/L 82 USEPA R4 5.2 5.2 1 1 0 0.033 0.033 ABL-SW012 5.2 5.2 0 0 0.1 0.1 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/L 0.000012 NCDEQ -- -- 2 0 2 0.00007 0.0001 -- 0.0001 0.000085 0 2 8.3 7.1 Category 2: QL>ESV
Nickel 7440-02-0 mg/L 0.02795 See Notes -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.1 0.1 No COPEC: QL<ESV
Selenium 7782-49-2 mg/L 0.0151 NCDEQ -- -- 2 0 2 0.005 0.005 -- 0.005 0.005 0 0 0.3 0.3 No COPEC: QL<ESV
Silver 7440-22-4 mg/L 0.00006 NCDEQ -- -- 2 0 2 0.0025 0.0025 -- 0.0025 0.0025 0 2 41.7 41.7 Category 2: QL>ESV
Thallium 7440-28-0 mg/L 0.006 USEPA R4 -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.8 0.8 No COPEC: QL<ESV
Zinc 7440-66-6 mg/L 0.06292 See Notes -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.0 0.0 No COPEC: QL<ESV
Pesticides
Aldrin 309-00-2 mg/L 0.000002 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 1 25.0 25.0 Category 2: QL>ESV
alpha BHC (Alpha Hexachlorocyclohexane) 319-84-6 mg/L 0.023 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 0 0.0 0.0 No COPEC: QL<ESV
Alpha Endosulfan 959-98-8 mg/L -- -- -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
beta BHC (Beta Hexachlorocyclohexane) 319-85-7 mg/L 0.055 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 0 0.0 0.0 No COPEC: QL<ESV
Beta Endosulfan 33213-65-9 mg/L 0.00005 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 0 1.0 1.0 No COPEC: QL<ESV
Chlordane 57-74-9 mg/L 0.000004 NCDEQ -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 1 125.0 125.0 Category 2: QL>ESV
delta BHC (Delta Hexachlorocyclohexane) 319-86-8 mg/L 0.04 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 0 0.0 0.0 No COPEC: QL<ESV
Dieldrin 60-57-1 mg/L 0.000002 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 1 25.0 25.0 Category 2: QL>ESV
Endosulfan sulfate 1031-07-8 mg/L 0.00005 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 0 1.0 1.0 No COPEC: QL<ESV
Endrin 72-20-8 mg/L 0.000002 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 1 25.0 25.0 Category 2: QL>ESV
Endrin Aldehyde 7421-93-4 mg/L -- -- -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
gamma BHC (Lindane) 58-89-9 mg/L 0.00001 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 1 5.0 5.0 Category 2: QL>ESV
Heptachlor 76-44-8 mg/L 0.000004 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 1 12.5 12.5 Category 2: QL>ESV
Heptachlor Epoxide 1024-57-3 mg/L 0.000004 USEPA R4 -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 1 12.5 12.5 Category 2: QL>ESV
P,P'-DDD 72-54-8 mg/L 0.00001 USEPA R4 -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 1 5.0 5.0 Category 2: QL>ESV
P,P'-DDE 72-55-9 mg/L 0.0003 USEPA R4 -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 0 0.2 0.2 No COPEC: QL<ESV
P,P'-DDT 50-29-3 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.00005 0.00005 -- 0.00005 0.00005 0 1 50.0 50.0 Category 2: QL>ESV
Toxaphene 8001-35-2 mg/L 0.0000002 NCDEQ -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 1 2500.0 2500.0 Category 2: QL>ESV
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
1 of 10
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/L -- -- -- -- 3 0 3 0.00042 0.0005 -- 0.0005 0.000473 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/L -- -- -- -- 3 0 3 0.00042 0.0005 -- 0.0005 0.000473 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/L -- -- -- -- 3 0 3 0.00042 0.0005 -- 0.0005 0.000473 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/L -- -- -- -- 3 0 3 0.00042 0.0005 -- 0.0005 0.000473 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/L -- -- -- -- 3 0 3 0.00042 0.0005 -- 0.0005 0.000473 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/L -- -- -- -- 3 0 3 0.00042 0.0005 -- 0.0005 0.000473 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/L -- -- -- -- 3 0 3 0.00042 0.0005 -- 0.0005 0.000473 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/L 0.000001 NCDEQ -- -- 3 0 3 0.00294 0.0035 -- 0.0035 0 0 0 3500.0 0.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/L 0.000001 NCDEQ -- -- 3 0 3 0.00294 0.0035 -- 0.0035 0.001657 3 3 3500.0 1656.7 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/L 0.000001 NCDEQ -- -- 3 0 3 0.00294 0.0035 -- 0.0035 0.003313 3 3 3500.0 3313.3 Category 2: QL>ESV
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 mg/L -- -- -- -- 1 0 1 2.5E-06 2.5E-06 -- 2.52E-06 2.52E-06 0 0 -- -- Category 4: No ESV & ND
PCB 12/13 E52450566 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 mg/L -- -- -- -- 1 0 1 3.4E-07 3.4E-07 -- 3.4E-07 3.4E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
PCB 18/30 E52450574 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
PCB 20/28 E52450582 mg/L -- -- -- -- 1 0 1 1.3E-06 1.3E-06 -- 1.33E-06 1.33E-06 0 0 -- -- Category 4: No ESV & ND
PCB 21/33 E52450590 mg/L -- -- -- -- 1 0 1 1.4E-06 1.4E-06 -- 1.39E-06 1.39E-06 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 mg/L -- -- -- -- 1 0 1 9.8E-07 9.8E-07 -- 9.78E-07 9.78E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
PCB 26/29 E52450608 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 mg/L -- -- -- -- 1 0 1 1.3E-06 1.3E-06 -- 1.34E-06 1.34E-06 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
2 of 10
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 mg/L -- -- -- -- 1 0 1 5.5E-07 5.5E-07 -- 5.45E-07 5.45E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 mg/L -- -- -- -- 1 0 1 2.6E-07 2.6E-07 -- 2.57E-07 2.57E-07 0 0 -- -- Category 4: No ESV & ND
PCB 40/41/71 E52450616 mg/L -- -- -- -- 1 0 1 1.5E-06 1.5E-06 -- 1.54E-06 1.54E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 43/73 (43/73) mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 44/47/65 E52450624 mg/L -- -- -- -- 1 0 1 1.5E-06 1.5E-06 -- 1.54E-06 1.54E-06 0 0 -- -- Category 4: No ESV & ND
PCB 45/51 E52450632 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 49/69 E52450640 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
PCB 50/53 E52450657 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 mg/L -- -- -- -- 1 0 1 1.6E-06 1.6E-06 -- 1.58E-06 1.58E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 59/62/75 E52450665 mg/L -- -- -- -- 1 0 1 1.5E-06 1.5E-06 -- 1.54E-06 1.54E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 61/70/74/76 E52450673 mg/L -- -- -- -- 1 0 1 2.1E-06 2.1E-06 -- 2.06E-06 2.06E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 mg/L -- -- -- -- 1 0 1 8.6E-07 8.6E-07 -- 8.64E-07 8.64E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 85/117/116 E52450699 mg/L -- -- -- -- 1 0 1 1.5E-06 1.5E-06 -- 1.54E-06 1.54E-06 0 0 -- -- Category 4: No ESV & ND
PCB 86/87/97/108/119/125 E52450707 mg/L -- -- -- -- 1 0 1 3.1E-06 3.1E-06 -- 3.09E-06 3.09E-06 0 0 -- -- Category 4: No ESV & ND
PCB 88/91 E52450715 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
3 of 10
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
PCB 90/101/113 E52450723 mg/L -- -- -- -- 1 0 1 1.5E-06 1.5E-06 -- 1.54E-06 1.54E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 93/98/100/102 (93/98/100/102) mg/L -- -- -- -- 1 0 1 2.1E-06 2.1E-06 -- 2.06E-06 2.06E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 mg/L -- -- -- -- 1 0 1 9.8E-07 9.8E-07 -- 9.78E-07 9.78E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 107/124 E52450749 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 110/115 E52450756 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 mg/L -- -- -- -- 1 0 1 6.6E-07 6.6E-07 -- 6.59E-07 6.59E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 128/166 E52450764 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
PCB 129/138/163 (129/138/163) mg/L -- -- -- -- 1 0 1 1.5E-06 1.5E-06 -- 1.54E-06 1.54E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 134/143 E52450780 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
PCB 135/151 (135/151) mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 139/140 E52450806 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 147/149 E52450814 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
4 of 10
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 153/168 E52450822 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 156/157 E52450830 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 171/173 E52450848 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 180/193 E52450855 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
PCB 183/185 E52450863 mg/L -- -- -- -- 1 0 1 1E-06 1E-06 -- 1.03E-06 1.03E-06 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 mg/L -- -- -- -- 1 0 1 5.2E-07 5.2E-07 -- 5.15E-07 5.15E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
PCB 197/200 E52450871 mg/L -- -- -- -- 1 0 1 1.5E-06 1.5E-06 -- 1.54E-06 1.54E-06 0 0 -- -- Category 4: No ESV & ND
5 of 10
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
PCB 198/199 E52450889 mg/L -- -- -- -- 1 0 1 1.5E-06 1.5E-06 -- 1.54E-06 1.54E-06 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Decachlorobiphenyl (PCB 209) 2051-24-3 mg/L -- -- -- -- 1 0 1 7.7E-07 7.7E-07 -- 7.72E-07 7.72E-07 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Congeners) totPCB_congener_ND=0 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.00011 0.00011 -- 0.0001098 0 0 0 109.8 0.0 Category 2: QL>ESV
Total PCBs (Congeners) totPCB_congener_ND=QL/2 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.00011 0.00011 -- 0.0001098 5.49E-05 1 1 109.8 54.9 Category 2: QL>ESV
Total PCBs (Congeners) totPCB_congener_ND=LOD mg/L 0.000001 NCDEQ -- -- 1 0 1 0.00011 0.00011 -- 0.0001098 0.00011 1 1 109.8 109.8 Category 2: QL>ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/L 0.056 See Notes -- -- 2 0 2 0.00024 0.0017 -- 0.0017 0.00097 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/L 0.307 See Notes -- -- 2 0 2 0.0002 0.0018 -- 0.0018 0.001 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/L 0.021 See Notes -- -- 2 0 2 0.00013 0.0011 -- 0.0011 0.000615 0 0 0.1 0.0 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/L 0.0022 See Notes -- -- 2 0 2 0.00032 0.00072 -- 0.00072 0.00052 0 0 0.3 0.2 No COPEC: QL<ESV
Benzo[a]pyrene 50-32-8 mg/L 0.00096 See Notes -- -- 2 0 2 0.00029 0.00071 -- 0.00071 0.0005 0 0 0.7 0.5 No COPEC: QL<ESV
Benzo[b]fluoranthene 205-99-2 mg/L 0.00068 See Notes -- -- 2 0 2 0.00027 0.00081 -- 0.00081 0.00054 0 1 1.2 0.8 Category 2: QL>ESV
Benzo[g,h,i]perylene 191-24-2 mg/L 0.00044 See Notes -- -- 2 0 2 0.00037 0.00097 -- 0.00097 0.00067 0 1 2.2 1.5 Category 2: QL>ESV
Benzo[k]fluoranthene 207-08-9 mg/L 0.00064 See Notes -- -- 2 0 2 0.00041 0.00087 -- 0.00087 0.00064 0 1 1.4 1.0 Category 2: QL>ESV
Chrysene 218-01-9 mg/L 0.002 See Notes -- -- 2 0 2 0.0002 0.00065 -- 0.00065 0.000425 0 0 0.3 0.2 No COPEC: QL<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/L 0.00028 See Notes -- -- 2 0 2 0.00053 0.0007 -- 0.0007 0.000615 0 2 2.5 2.2 Category 2: QL>ESV
Fluoranthene 206-44-0 mg/L 0.0071 See Notes -- -- 2 0 2 0.0002 0.00087 -- 0.00087 0.000535 0 0 0.1 0.1 No COPEC: QL<ESV
Fluorene 86-73-7 mg/L 0.039 See Notes -- -- 2 0 2 0.0002 0.0016 -- 0.0016 0.0009 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/L 0.00028 See Notes -- -- 2 0 2 0.00028 0.0018 -- 0.0018 0.00104 0 1 6.4 3.7 Category 2: QL>ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes 0.0011 0.0011 2 1 1 0.00033 0.0015 ABL-SW012 0.0015 0.0013 0 0 0.0 0.0 No COPEC: EPC<ESV
Phenanthrene 85-01-8 mg/L 0.019 See Notes -- -- 2 0 2 0.00021 0.001 -- 0.001 0.000605 0 0 0.1 0.0 No COPEC: QL<ESV
Pyrene 129-00-0 mg/L 0.01 See Notes -- -- 2 0 2 0.00018 0.00053 -- 0.00053 0.000355 0 0 0.1 0.0 No COPEC: QL<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/L -- -- -- -- 2 0 2 0.00285 0.00776 -- 0.00776 0 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/L -- -- -- -- 2 0 2 0.00285 0.00776 -- 0.00776 0.002653 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=LOD mg/L -- -- -- -- 2 0 2 0.00285 0.00776 -- 0.00776 0.005305 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=0 mg/L -- -- 0.0011 0.0011 2 1 1 0.00151 0.00957 ABL-SW012 0.00957 0.00055 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/L -- -- 0.00169 0.00169 2 1 1 0.00151 0.00957 ABL-SW012 0.00957 0.003238 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=LOD mg/L -- -- 0.00228 0.00228 2 1 1 0.00151 0.00957 ABL-SW012 0.00957 0.005925 0 0 -- -- Category 3: No ESV & Detect
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/L 0.075 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Diphenylhydrazine 122-66-7 mg/L 0.0011 USEPA R4 -- -- 1 0 1 0.00087 0.00087 -- 0.00087 0.00087 0 0 0.8 0.8 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
6 of 10
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.1 0.1 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/L 0.11 NCDEQ -- -- 2 0 2 0.00094 0.0022 -- 0.0022 0.00157 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorophenol 95-57-8 mg/L 0.018 USEPA R4 -- -- 2 0 2 0.0012 0.0015 -- 0.0015 0.00135 0 0 0.1 0.1 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/L 0.072 See Notes -- -- 2 0 2 0.00027 0.0017 -- 0.0017 0.000985 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/L 0.067 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/L 0.017 USEPA R4 -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 0.2 0.2 No COPEC: QL<ESV
2-Nitrophenol 88-75-5 mg/L 0.073 USEPA R4 -- -- 2 0 2 0.00088 0.0017 -- 0.0017 0.00129 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/L 0.011 USEPA R4 -- -- 2 0 2 0.0016 0.0017 -- 0.0017 0.00165 0 0 0.2 0.2 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/L 0.015 USEPA R4 -- -- 2 0 2 0.0012 0.0022 -- 0.0022 0.0017 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/L 0.071 USEPA R4 -- -- 2 0 2 0.0065 0.0087 -- 0.0087 0.0076 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/L 0.044 USEPA R4 -- -- 2 0 2 0.00087 0.0012 -- 0.0012 0.001035 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/L 0.0019 USEPA R4 -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 1 1.2 1.2 Category 2: QL>ESV
2,4,6-Trichlorophenol 88-06-2 mg/L 0.0049 USEPA R4 -- -- 2 0 2 0.0012 0.0019 -- 0.0019 0.00155 0 0 0.4 0.3 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/L 0.081 USEPA R4 -- -- 2 0 2 0.00094 0.0017 -- 0.0017 0.00132 0 0 0.0 0.0 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/L 0.053 See Notes -- -- 2 0 2 0.0017 0.0019 -- 0.0019 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
3-Nitroaniline 99-09-2 mg/L -- -- -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/L 0.0045 USEPA R4 -- -- 2 0 2 0.0014 0.002 -- 0.002 0.0017 0 0 0.4 0.4 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/L 0.002 NCDEQ -- -- 2 0 2 0.00079 0.0013 -- 0.0013 0.001045 0 0 0.7 0.5 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/L 0.001 USEPA R4 -- -- 2 0 2 0.0036 0.0042 -- 0.0042 0.0039 0 2 4.2 3.9 Category 2: QL>ESV
4-Chloroaniline 106-47-8 mg/L 0.0008 USEPA R4 -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 1 4.3 4.3 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/L -- -- -- -- 2 0 2 0.00084 0.0021 -- 0.0021 0.00147 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/L -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/L 0.058 USEPA R4 -- -- 2 0 2 0.0039 0.0058 -- 0.0058 0.00485 0 0 0.1 0.1 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/L -- -- -- -- 2 0 2 0.0017 0.0025 -- 0.0025 0.0021 0 0 -- -- Category 4: No ESV & ND
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/L 0.0041 USEPA R4 -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.3 0.3 No COPEC: QL<ESV
Benzidine 92-87-5 mg/L 0.0015 USEPA R4 -- -- 1 0 1 0.0049 0.0049 -- 0.0049 0.0049 0 1 3.3 3.3 Category 2: QL>ESV
Benzoic acid 65-85-0 mg/L 9 NCDEQ -- -- 1 0 1 0.0111 0.0111 -- 0.0111 0.0111 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Alcohol 100-51-6 mg/L 0.5 NCDEQ -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/L 0.019 NCDEQ -- -- 2 0 2 0.00075 0.00076 -- 0.00076 0.000755 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/L 9.2 NCDEQ -- -- 2 0 2 0.00088 0.0017 -- 0.0017 0.00129 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/L -- -- -- -- 2 0 2 0.00096 0.0015 -- 0.0015 0.00123 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/L -- -- -- -- 2 0 2 0.00091 0.0016 -- 0.0016 0.001255 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/L 0.005 NCDEQ -- -- 2 0 2 0.00076 0.00085 -- 0.00085 0.000805 0 0 0.2 0.2 No COPEC: QL<ESV
Di-N-Butyl Phthalate 84-74-2 mg/L 0.0095 NCDEQ -- -- 2 0 2 0.00072 0.0011 -- 0.0011 0.00091 0 0 0.1 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/L 0.215 USEPA R4 -- -- 2 0 2 0.00063 0.00086 -- 0.00086 0.000745 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/L 0.004 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.5 0.5 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/L 1.2 NCDEQ -- -- 2 0 2 0.00056 0.0013 -- 0.0013 0.00093 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/L 3.4 NCDEQ -- -- 2 0 2 0.00073 0.0015 -- 0.0015 0.001115 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/L 0.00015 USEPA R4 -- -- 2 0 2 0.00069 0.0011 -- 0.0011 0.000895 0 2 7.3 6.0 Category 2: QL>ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 2 0 2 0.0009 0.0018 -- 0.0018 0.00135 0 1 1.8 1.4 Category 2: QL>ESV
7 of 10
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Hexachlorocyclopentadiene 77-47-4 mg/L 0.00007 NCDEQ -- -- 2 0 2 0.00085 0.0018 -- 0.0018 0.001325 0 2 25.7 18.9 Category 2: QL>ESV
Hexachloroethane 67-72-1 mg/L 0.012 USEPA R4 -- -- 2 0 2 0.0011 0.0015 -- 0.0015 0.0013 0 0 0.1 0.1 No COPEC: QL<ESV
Isophorone 78-59-1 mg/L 0.92 USEPA R4 -- -- 2 0 2 0.00086 0.0018 -- 0.0018 0.00133 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/L -- -- -- -- 2 0 2 0.00095 0.0021 -- 0.0021 0.001525 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/L 17 NCDEQ -- -- 2 0 2 0.00088 0.0013 -- 0.0013 0.00109 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodiphenylamine 86-30-6 mg/L 0.29 NCDEQ -- -- 2 0 2 0.00096 0.0013 -- 0.0013 0.00113 0 0 0.0 0.0 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/L 4.6 NCDEQ -- -- 2 0 2 0.0011 0.0017 -- 0.0017 0.0014 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/L 0.015 USEPA R4 -- -- 2 0 2 0.0023 0.0044 -- 0.0044 0.00335 0 0 0.3 0.2 No COPEC: QL<ESV
Phenol 108-95-2 mg/L 0.16 USEPA R4 0.0064 0.0064 3 1 2 0.0017 0.005 ABL-SW012 0.0064 0.0033 0 0 0.0 0.0 No COPEC: EPC<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/L 0.41 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/L 0.13 USEPA R4 -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/L 2.5 NCDEQ -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/L 0.085 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/L 2.3 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/L 0.2 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/L 2 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-dichloroethene (cis+trans) 540-59-0 mg/L 0.97 USEPA R4 -- -- 1 0 1 0.0044 0.0044 -- 0.0044 0.0044 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/L 0.52 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/L 0.008 USEPA R4 -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.3 0.3 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 mg/L 0.63 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.2 0.2 No COPEC: QL<ESV
2-Chloroethyl Vinyl Ether 110-75-8 mg/L -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
2-Chlorotoluene 95-49-8 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/L 0.099 USEPA R4 -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
4-Chlorotoluene 106-43-4 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/L 2 NCDEQ -- -- 1 0 1 0.01 0.01 -- 0.01 0.01 0 0 0.0 0.0 No COPEC: QL<ESV
Acrolein 107-02-8 mg/L 0.003 USEPA R4 -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.3 0.3 No COPEC: QL<ESV
Acrylonitrile 107-13-1 mg/L 0.42 NCDEQ -- -- 1 0 1 0.0115 0.0115 -- 0.0115 0.0115 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/L 0.16 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
8 of 10
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Bromochloromethane 74-97-5 mg/L -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/L 0.34 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/L 0.23 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/L 0.00004 NCDEQ -- -- 2 0 2 0.001 0.0025 -- 0.0025 0.00175 0 2 62.5 43.8 Category 2: QL>ESV
Carbon Tetrachloride 56-23-5 mg/L 0.077 USEPA R4 -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/L 0.14 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/L -- -- -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/L 0.14 USEPA R4 -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/L -- -- -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/L 0.62 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/L 0.0017 USEPA R4 -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Dibromochloromethane 124-48-1 mg/L 0.32 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/L -- -- -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/L 0.097 NCDEQ -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 1.8 1.8 Category 2: QL>ESV
Isopropyl Ether 108-20-3 mg/L 20 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Isopropylbenzene (Cumene) 98-82-8 mg/L 0.25 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/L 0.42 See Notes -- -- 1 0 1 0.0031 0.0031 -- 0.0031 0.0031 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Ethyl Ketone 78-93-3 mg/L 26 NCDEQ -- -- 1 0 1 0.0049 0.0049 -- 0.0049 0.0049 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/L 26 NCDEQ -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/L 11 NCDEQ -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/L 0.0039 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.5 0.5 No COPEC: QL<ESV
N-Propylbenzene 103-65-1 mg/L 0.08 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene) 95-47-6 mg/L 0.6 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
p-Cymene (p-Isopropyltoluene) 99-87-6 mg/L 0.32 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/L 0.032 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Alcohol 75-65-0 mg/L -- -- -- -- 1 0 1 0.0577 0.0577 -- 0.0577 0.0577 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/L 34 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/L 0.053 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/L 0.011 NCDEQ -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/L 0.558 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/L 0.0017 USEPA R4 -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Trichloroethylene 79-01-6 mg/L 0.22 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Trichlorofluoromethane 75-69-4 mg/L -- -- -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/L 0.016 USEPA R4 -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.1 0.1 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/L 0.93 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
9 of 10
Table C-3
Summary Surface Water Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB mg/L -- -- 43 43 1 1 0 5 5 ABL-SW012 43 43 0 0 -- -- Category 3: No ESV & Detect
Alkalinity, Carbonate (As CaCO3) ALKC mg/L -- -- -- -- 1 0 1 5 5 -- 5 5 0 0 -- -- Category 4: No ESV & ND
Alkalinity, Total (As CaCO3) ALK mg/L 20 USEPA R4 44 44 1 1 0 5 5 ABL-SW012 44 44 1 1 2.2 2.2 Category 1/5: Max EPC>ESV
Bromide 24959-67-9 mg/L -- -- -- -- 1 0 1 0.4 0.4 -- 0.4 0.4 0 0 -- -- Category 4: No ESV & ND
Chloride (As Cl) 16887-00-6 mg/L 230 NCDEQ 6.8 6 2 2 0 0.18 0.4 ABL-SW012 6.8 6.4 0 0 0.0 0.0 No COPEC: EPC<ESV
Hardness (As CaCO3) HARD mg/L -- -- 50 50 1 1 0 3.3 3.3 ABL-SW012 50 50 0 0 -- -- Category 3: No ESV & Detect
pH PH SU 20 USEPA R4 7.4 7.4 1 1 0 -- -- ABL-SW012 7.4 7.4 0 0 0.4 0.4 No COPEC: EPC<ESV
Sulfate (As SO4) 14808-79-8 mg/L -- -- 4.4 4.4 1 1 0 0.8 0.8 ABL-SW012 4.4 4.4 0 0 -- -- Category 3: No ESV & Detect
Total Hardness TOTHARD mg/L -- -- 39.2 16 5 5 0 0.662 0.662 ABL-SW012 39.2 23.02 0 0 -- -- Category 3: No ESV & Detect
10 of 10
Table C-4
Summary Sediment Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 0.13 0.13 1 1 0 0.062 0.062 ABL-SD003 0.13 0.13 0 0 -- -- Category 3: No ESV & Detect
Fluoride 16984-48-8 mg/kg -- -- -- -- 1 0 1 14.4 14.4 -- 14.4 14.4 0 0 -- -- Category 4: No ESV & ND
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 6.5 6.5 1 1 0 0.35 0.35 ABL-SD003 6.5 6.5 0 0 0.2 0.2 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 89.3 89.3 1 1 0 0.17 0.17 ABL-SD003 89.3 89.3 1 1 1.5 1.5 Category 1: Max EPC>ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.17 0.17 1 1 0 0.035 0.035 ABL-SD003 0.17 0.17 0 0 0.0 0.0 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 108 108 1 1 0 0.17 0.17 ABL-SD003 108 108 0 0 1.0 1.0 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 18.4 18.4 1 1 0 0.17 0.17 ABL-SD003 18.4 18.4 0 0 0.1 0.1 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.01 0.01 1 1 0 0.000099 0.000099 ABL-SD003 0.01 0.01 0 0 0.0 0.0 No COPEC: EPC<ESV
Selenium 7782-49-2 mg/kg 2.9 EPA R4 RSV -- -- 1 0 1 0.35 0.35 -- 0.35 0.35 0 0 0.1 0.1 No COPEC: QL<ESV
Silver 7440-22-4 mg/kg 2.2 EPA R4 RSV 0.49 0.49 1 1 0 0.17 0.17 ABL-SD003 0.49 0.49 0 0 0.2 0.2 No COPEC: EPC<ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/kg -- -- -- -- 2 0 2 0.0174 0.0191 -- 0.0191 0.01825 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/kg -- -- -- -- 2 0 2 0.0174 0.0191 -- 0.0191 0.01825 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/kg -- -- -- -- 2 0 2 0.0174 0.0191 -- 0.0191 0.01825 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/kg -- -- -- -- 2 0 2 0.0174 0.0191 -- 0.0191 0.01825 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/kg -- -- -- -- 2 0 2 0.0174 0.0191 -- 0.0191 0.01825 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/kg -- -- -- -- 2 0 2 0.0174 0.0191 -- 0.0191 0.01825 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/kg -- -- -- -- 2 0 2 0.0174 0.0191 -- 0.0191 0.01825 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/kg 0.676 EPA R4 RSV -- -- 2 0 2 0.1218 0.1337 -- 0.1337 0 0 0 0.2 0.0 No COPEC: QL<ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/kg 0.676 EPA R4 RSV -- -- 2 0 2 0.1218 0.1337 -- 0.1337 0.063875 0 0 0.2 0.1 No COPEC: QL<ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/kg 0.676 EPA R4 RSV -- -- 2 0 2 0.1218 0.1337 -- 0.1337 0.12775 0 0 0.2 0.2 No COPEC: QL<ESV
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 mg/kg -- -- -- -- 1 0 1 0.000238 0.000238 -- 0.000238 0.000238 0 0 -- -- Category 4: No ESV & ND
PCB 12/13 E52450566 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 mg/kg -- -- -- -- 1 0 1 3.21E-05 3.21E-05 -- 0.0000321 3.21E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
PCB 18/30 E52450574 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
1 of 9
Table C-4
Summary Sediment Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
PCB 20/28 E52450582 mg/kg -- -- -- -- 1 0 1 0.000125 0.000125 -- 0.000125 0.000125 0 0 -- -- Category 4: No ESV & ND
PCB 21/33 E52450590 mg/kg -- -- -- -- 1 0 1 0.000131 0.000131 -- 0.000131 0.000131 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 mg/kg -- -- -- -- 1 0 1 9.23E-05 9.23E-05 -- 0.0000923 9.23E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
PCB 26/29 E52450608 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 mg/kg -- -- -- -- 1 0 1 0.000126 0.000126 -- 0.000126 0.000126 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 mg/kg -- -- -- -- 1 0 1 5.15E-05 5.15E-05 -- 0.0000515 5.15E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 mg/kg -- -- -- -- 1 0 1 2.43E-05 2.43E-05 -- 0.0000243 2.43E-05 0 0 -- -- Category 4: No ESV & ND
PCB 40/41/71 E52450616 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 -- 0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 43/73 (43/73) mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 44/47/65 E52450624 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 -- 0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
PCB 45/51 E52450632 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 49/69 E52450640 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
PCB 50/53 E52450657 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 mg/kg -- -- -- -- 1 0 1 0.00015 0.00015 -- 0.00015 0.00015 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 59/62/75 E52450665 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 -- 0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 61/70/74/76 E52450673 mg/kg -- -- -- -- 1 0 1 0.000194 0.000194 -- 0.000194 0.000194 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 mg/kg -- -- -- -- 1 0 1 8.16E-05 8.16E-05 -- 0.0000816 8.16E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
2 of 9
Table C-4
Summary Sediment Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 85/117/116 E52450699 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 -- 0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
PCB 86/87/97/108/119/125 E52450707 mg/kg -- -- -- -- 1 0 1 0.000291 0.000291 -- 0.000291 0.000291 0 0 -- -- Category 4: No ESV & ND
PCB 88/91 E52450715 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 90/101/113 E52450723 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 -- 0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 93/98/100/102 (93/98/100/102) mg/kg -- -- -- -- 1 0 1 0.000194 0.000194 -- 0.000194 0.000194 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 mg/kg -- -- -- -- 1 0 1 9.23E-05 9.23E-05 -- 0.0000923 9.23E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 107/124 E52450749 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 110/115 E52450756 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 mg/kg -- -- -- -- 1 0 1 6.22E-05 6.22E-05 -- 0.0000622 6.22E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 128/166 E52450764 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
PCB 129/138/163 (129/138/163) mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 -- 0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
3 of 9
Table C-4
Summary Sediment Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 134/143 E52450780 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
PCB 135/151 (135/151) mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 139/140 E52450806 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 147/149 E52450814 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 153/168 E52450822 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 156/157 E52450830 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 171/173 E52450848 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 180/193 E52450855 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
PCB 183/185 E52450863 mg/kg -- -- -- -- 1 0 1 9.71E-05 9.71E-05 -- 0.0000971 9.71E-05 0 0 -- -- Category 4: No ESV & ND
4 of 9
Table C-4
Summary Sediment Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 mg/kg -- -- -- -- 1 0 1 4.86E-05 4.86E-05 -- 0.0000486 4.86E-05 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
PCB 197/200 E52450871 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 -- 0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
PCB 198/199 E52450889 mg/kg -- -- -- -- 1 0 1 0.000146 0.000146 -- 0.000146 0.000146 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Decachlorobiphenyl (PCB 209) 2051-24-3 mg/kg -- -- -- -- 1 0 1 7.29E-05 7.29E-05 -- 0.0000729 7.29E-05 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Congeners) totPCB_congener_ND=0 mg/kg 0.676 EPA R4 RSV -- -- 1 0 1 0.010366 0.010366 -- 0.010366 0 0 0 0.0 0.0 No COPEC: QL<ESV
Total PCBs (Congeners) totPCB_congener_ND=QL/2 mg/kg 0.676 EPA R4 RSV -- -- 1 0 1 0.010366 0.010366 -- 0.010366 0.005183 0 0 0.0 0.0 No COPEC: QL<ESV
Total PCBs (Congeners) totPCB_congener_ND=LOD mg/kg 0.676 EPA R4 RSV -- -- 1 0 1 0.010366 0.010366 -- 0.010366 0.010366 0 0 0.0 0.0 No COPEC: QL<ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg 9.82 EPA R4 RSV -- -- 2 0 2 0.002 0.0882 -- 0.0882 0.0451 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/kg 9.04 EPA R4 RSV -- -- 2 0 2 0.0017 0.0905 -- 0.0905 0.0461 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/kg 11.88 EPA R4 RSV -- -- 2 0 2 0.0018 0.0859 -- 0.0859 0.04385 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/kg 16.82 EPA R4 RSV -- -- 2 0 2 0.00093 0.0708 -- 0.0708 0.035865 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[a]pyrene 50-32-8 mg/kg 19.3 EPA R4 RSV -- -- 2 0 2 0.0014 0.0731 -- 0.0731 0.03725 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[b]fluoranthene 205-99-2 mg/kg 19.58 EPA R4 RSV -- -- 2 0 2 0.00088 0.0662 -- 0.0662 0.03354 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[g,h,i]perylene 191-24-2 mg/kg 21.8 EPA R4 RSV -- -- 2 0 2 0.0034 0.0975 -- 0.0975 0.05045 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[k]fluoranthene 207-08-9 mg/kg 19.62 EPA R4 RSV -- -- 2 0 2 0.002 0.0755 -- 0.0755 0.03875 0 0 0.0 0.0 No COPEC: QL<ESV
Chrysene 218-01-9 mg/kg 16.88 EPA R4 RSV -- -- 2 0 2 0.0024 0.0511 -- 0.0511 0.02675 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/kg 22.4 EPA R4 RSV -- -- 2 0 2 0.0024 0.0813 -- 0.0813 0.04185 0 0 0.0 0.0 No COPEC: QL<ESV
Fluoranthene 206-44-0 mg/kg 14.14 EPA R4 RSV -- -- 2 0 2 0.0011 0.0557 -- 0.0557 0.0284 0 0 0.0 0.0 No COPEC: QL<ESV
Fluorene 86-73-7 mg/kg 10.76 EPA R4 RSV -- -- 2 0 2 0.0021 0.0789 -- 0.0789 0.0405 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg 22.4 EPA R4 RSV -- -- 2 0 2 0.0037 0.0789 -- 0.0789 0.0413 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV -- -- 2 0 2 0.003 0.094 -- 0.094 0.0485 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/kg 11.92 EPA R4 RSV -- -- 2 0 2 0.002 0.0638 -- 0.0638 0.0329 0 0 0.0 0.0 No COPEC: QL<ESV
5 of 9
Table C-4
Summary Sediment Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Pyrene 129-00-0 mg/kg 13.94 EPA R4 RSV -- -- 2 0 2 0.0024 0.065 -- 0.065 0.0337 0 0 0.0 0.0 No COPEC: QL<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/kg -- -- -- -- 2 0 2 0.01951 0.6594 -- 0.6594 0 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg -- -- -- -- 2 0 2 0.01951 0.6594 -- 0.6594 0.169728 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg -- -- -- -- 2 0 2 0.01951 0.6594 -- 0.6594 0.339455 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg -- -- -- -- 2 0 2 0.0137 0.557 -- 0.557 0 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg -- -- -- -- 2 0 2 0.0137 0.557 -- 0.557 0.28535 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg -- -- -- -- 2 0 2 0.0137 0.557 -- 0.557 0.142675 0 0 -- -- Category 4: No ESV & ND
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg 8.92 EPA R4 RSV -- -- 2 0 2 0.0016 0.0998 -- 0.0998 0.0507 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 1 0 1 0.102 0.102 -- 0.102 0.102 0 0 0.1 0.1 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 1 0 1 0.0743 0.0743 -- 0.0743 0.0743 0 0 0.1 0.1 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.0871 0.0871 -- 0.0871 0.0871 0 0 0.1 0.1 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.108 0.108 -- 0.108 0.108 0 0 0.1 0.1 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/kg -- -- -- -- 1 0 1 0.0755 0.0755 -- 0.0755 0.0755 0 0 -- -- Category 4: No ESV & ND
2-Chlorophenol 95-57-8 mg/kg 0.55 EPA R4 RSV -- -- 1 0 1 0.104 0.104 -- 0.104 0.104 0 0 0.2 0.2 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/kg 8.94 EPA R4 RSV -- -- 2 0 2 0.0014 0.0824 -- 0.0824 0.0419 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/kg 3.546 EPA R4 RSV -- -- 1 0 1 0.116 0.116 -- 0.116 0.116 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/kg -- -- -- -- 1 0 1 0.118 0.118 -- 0.118 0.118 0 0 -- -- Category 4: No ESV & ND
2-Nitrophenol 88-75-5 mg/kg 7.178 EPA R4 RSV -- -- 1 0 1 0.0929 0.0929 -- 0.0929 0.0929 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/kg 3.772 EPA R4 RSV -- -- 1 0 1 0.0836 0.0836 -- 0.0836 0.0836 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/kg 2.874 EPA R4 RSV -- -- 1 0 1 0.151 0.151 -- 0.151 0.151 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/kg 5.922 EPA R4 RSV -- -- 1 0 1 0.0627 0.0627 -- 0.0627 0.0627 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/kg 2.9 EPA R4 RSV -- -- 1 0 1 0.072 0.072 -- 0.072 0.072 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/kg 3.928 EPA R4 RSV -- -- 1 0 1 0.118 0.118 -- 0.118 0.118 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,6-Trichlorophenol 88-06-2 mg/kg 3.928 EPA R4 RSV -- -- 1 0 1 0.0847 0.0847 -- 0.0847 0.0847 0 0 0.0 0.0 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/kg 0.262 EPA R4 RSV -- -- 1 0 1 0.0801 0.0801 -- 0.0801 0.0801 0 0 0.3 0.3 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/kg -- -- -- -- 1 0 1 0.151 0.151 -- 0.151 0.151 0 0 -- -- Category 4: No ESV & ND
3-Nitroaniline 99-09-2 mg/kg -- -- -- -- 1 0 1 0.104 0.104 -- 0.104 0.104 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/kg 0.18 EPA R4 RSV -- -- 1 0 1 0.0836 0.0836 -- 0.0836 0.0836 0 0 0.5 0.5 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/kg 0.124 EPA R4 RSV -- -- 1 0 1 0.0696 0.0696 -- 0.0696 0.0696 0 0 0.6 0.6 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/kg 4.07 EPA R4 RSV -- -- 1 0 1 0.0789 0.0789 -- 0.0789 0.0789 0 0 0.0 0.0 No COPEC: QL<ESV
4-Chloroaniline 106-47-8 mg/kg 0.042 EPA R4 RSV -- -- 1 0 1 0.107 0.107 -- 0.107 0.107 0 1 2.5 2.5 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/kg -- -- -- -- 1 0 1 0.0789 0.0789 -- 0.0789 0.0789 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/kg -- -- -- -- 1 0 1 0.108 0.108 -- 0.108 0.108 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/kg 8.21 EPA R4 RSV -- -- 1 0 1 0.0685 0.0685 -- 0.0685 0.0685 0 0 0.0 0.0 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/kg 4.608 EPA R4 RSV -- -- 1 0 1 0.0766 0.0766 -- 0.0766 0.0766 0 0 0.0 0.0 No COPEC: QL<ESV
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/kg 0.024 EPA R4 RSV -- -- 1 0 1 0.103 0.103 -- 0.103 0.103 0 1 4.3 4.3 Category 2: QL>ESV
Benzoic acid 65-85-0 mg/kg 4 EPA R4 RSV -- -- 1 0 1 0.0696 0.0696 -- 0.0696 0.0696 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Alcohol 100-51-6 mg/kg 13.458 EPA R4 RSV -- -- 1 0 1 0.0766 0.0766 -- 0.0766 0.0766 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/kg 0.962 EPA R4 RSV -- -- 1 0 1 0.0813 0.0813 -- 0.0813 0.0813 0 0 0.1 0.1 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/kg -- -- -- -- 1 0 1 0.0894 0.0894 -- 0.0894 0.0894 0 0 -- -- Category 4: No ESV & ND
6 of 9
Table C-4
Summary Sediment Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/kg 16.326 EPA R4 RSV -- -- 1 0 1 0.0975 0.0975 -- 0.0975 0.0975 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/kg -- -- -- -- 1 0 1 0.102 0.102 -- 0.102 0.102 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/kg 5.2 EPA R4 RSV -- -- 1 0 1 0.104 0.104 -- 0.104 0.104 0 0 0.0 0.0 No COPEC: QL<ESV
Di-N-Butyl Phthalate 84-74-2 mg/kg 0.638 EPA R4 RSV -- -- 1 0 1 0.0627 0.0627 -- 0.0627 0.0627 0 0 0.1 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/kg 2.2 EPA R4 RSV -- -- 1 0 1 0.0801 0.0801 -- 0.0801 0.0801 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/kg 4.626 EPA R4 RSV -- -- 1 0 1 0.0627 0.0627 -- 0.0627 0.0627 0 0 0.0 0.0 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/kg 2.21 EPA R4 RSV -- -- 1 0 1 0.0592 0.0592 -- 0.0592 0.0592 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/kg 4.062 EPA R4 RSV -- -- 1 0 1 0.0778 0.0778 -- 0.0778 0.0778 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/kg 0.48 EPA R4 RSV -- -- 1 0 1 0.0488 0.0488 -- 0.0488 0.0488 0 0 0.1 0.1 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 1 0 1 0.0662 0.0662 -- 0.0662 0.0662 0 0 -- -- Category 4: No ESV & ND
Hexachlorocyclopentadiene 77-47-4 mg/kg 0.81 EPA R4 RSV -- -- 1 0 1 0.0708 0.0708 -- 0.0708 0.0708 0 0 0.1 0.1 No COPEC: QL<ESV
Hexachloroethane 67-72-1 mg/kg 0.15 EPA R4 RSV -- -- 1 0 1 0.101 0.101 -- 0.101 0.101 0 0 0.7 0.7 No COPEC: QL<ESV
Isophorone 78-59-1 mg/kg 1.896 EPA R4 RSV -- -- 1 0 1 0.0859 0.0859 -- 0.0859 0.0859 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/kg -- -- -- -- 1 0 1 0.0731 0.0731 -- 0.0731 0.0731 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/kg -- -- -- -- 1 0 1 0.124 0.124 -- 0.124 0.124 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodiphenylamine 86-30-6 mg/kg 0.74 EPA R4 RSV -- -- 1 0 1 0.114 0.114 -- 0.114 0.114 0 0 0.2 0.2 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/kg 18.014 EPA R4 RSV -- -- 1 0 1 0.104 0.104 -- 0.104 0.104 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/kg 1.2 EPA R4 RSV -- -- 1 0 1 0.0696 0.0696 -- 0.0696 0.0696 0 0 0.1 0.1 No COPEC: QL<ESV
Phenol 108-95-2 mg/kg 0.21 EPA R4 RSV -- -- 1 0 1 0.115 0.115 -- 0.115 0.115 0 0 0.5 0.5 No COPEC: QL<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/kg 3.332 EPA R4 RSV -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/kg 1.506 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/kg -- -- -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/kg 0.734 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/kg 0.836 EPA R4 RSV -- -- 1 0 1 0.0026 0.0026 -- 0.0026 0.0026 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/kg 3.09 EPA R4 RSV -- -- 1 0 1 0.0026 0.0026 -- 0.0026 0.0026 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/kg 4.46 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/kg -- -- -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 mg/kg -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/kg 2.262 EPA R4 RSV -- -- 1 0 1 0.0027 0.0027 -- 0.0027 0.0027 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/kg 1.752 EPA R4 RSV -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/kg 0.99 EPA R4 RSV -- -- 1 0 1 0.0027 0.0027 -- 0.0027 0.0027 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/kg -- -- -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/kg 0.722 EPA R4 RSV -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/kg -- -- -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 mg/kg 0.708 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorotoluene 95-49-8 mg/kg -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
7 of 9
Table C-4
Summary Sediment Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
2-Hexanone 591-78-6 mg/kg 15.196 EPA R4 RSV -- -- 1 0 1 0.0048 0.0048 -- 0.0048 0.0048 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/kg -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
4-Chlorotoluene 106-43-4 mg/kg -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/kg 76.266 EPA R4 RSV -- -- 1 0 1 0.0124 0.0124 -- 0.0124 0.0124 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/kg 4.37 EPA R4 RSV -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/kg -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/kg -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/kg 0.42 EPA R4 ESV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/kg 0.284 EPA R4 ESV -- -- 1 0 1 0.0029 0.0029 -- 0.0029 0.0029 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/kg 0.013 EPA R4 ESV -- -- 1 0 1 0.0031 0.0031 -- 0.0031 0.0031 0 0 0.2 0.2 No COPEC: QL<ESV
Carbon Tetrachloride 56-23-5 mg/kg 1.412 EPA R4 RSV -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/kg 1.878 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/kg -- -- -- -- 1 0 1 0.003 0.003 -- 0.003 0.003 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/kg 6.704 EPA R4 RSV -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/kg -- -- -- -- 1 0 1 0.003 0.003 -- 0.003 0.003 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/kg 2.27 EPA R4 RSV -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/kg -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Dibromochloromethane 124-48-1 mg/kg 0.396 EPA R4 ESV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/kg -- -- -- -- 1 0 1 0.0031 0.0031 -- 0.0031 0.0031 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/kg -- -- -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/kg 2.934 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
Isopropyl Ether 108-20-3 mg/kg -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
Isopropylbenzene (Cumene) 98-82-8 mg/kg 1.426 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/kg -- -- -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 -- -- Category 4: No ESV & ND
Methyl Ethyl Ketone 78-93-3 mg/kg 45.414 EPA R4 RSV -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/kg 16.33 EPA R4 RSV -- -- 1 0 1 0.0046 0.0046 -- 0.0046 0.0046 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/kg 4.808 EPA R4 RSV -- -- 1 0 1 0.0037 0.0037 -- 0.0037 0.0037 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/kg -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
N-Propylbenzene 103-65-1 mg/kg -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene) 95-47-6 mg/kg -- -- -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
p-Cymene (p-Isopropyltoluene) 99-87-6 mg/kg 0.484 EPA R4 RSV -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/kg -- -- -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/kg 3.242 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/kg -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/kg 8.866 EPA R4 RSV -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/kg 0.83 EPA R4 RSV -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/kg 4.148 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/kg 2.27 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/kg -- -- -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 -- -- Category 4: No ESV & ND
8 of 9
Table C-4
Summary Sediment Screening - Upgradient Little Mountain Creek
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Trichloroethylene 79-01-6 mg/kg 1.384 EPA R4 RSV -- -- 1 0 1 0.0026 0.0026 -- 0.0026 0.0026 0 0 0.0 0.0 No COPEC: QL<ESV
Trichlorofluoromethane 75-69-4 mg/kg -- -- -- -- 1 0 1 0.0027 0.0027 -- 0.0027 0.0027 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/kg 4.46 EPA R4 RSV -- -- 1 0 1 0.0109 0.0109 -- 0.0109 0.0109 0 0 0.0 0.0 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/kg 2.356 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
Xylenes 1330-20-7 mg/kg 2.148 EPA R4 RSV -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 0.0 0.0 No COPEC: QL<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 22.6 13.9 2 2 0 0.1 0.1 ABL-SD008 22.6 18.25 0 0 -- -- Category 3: No ESV & Detect
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
RSV - Refined screening value
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
9 of 9
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/L 0.005 NCDEQ 0.078 0.014 13 13 0 0.002 0.004 ABL-SW013 0.078 0.054385 13 13 15.6 10.9 Category 1/5: Max EPC>ESV
Cyanide, Available 57-12-5_AVAIL mg/L 0.005 NCDEQ 0.0086 0.0008 6 5 1 0.0003 0.0015 ABL-SW014 0.0086 0.00435 2 2 1.7 0.9 Category 1/5: Max EPC>ESV
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 23.8 0.52 11 11 0 0.04 5 ABL-ML003 23.8 5.013636 6 6 13.2 2.8 Category 1/5: Max EPC>ESV
Metals
Arsenic 7440-38-2 mg/L 0.15 NCDEQ -- -- 2 0 2 0.005 0.005 -- 0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0276 0.0236 2 2 0 0.0025 0.0025 ABL-SW006 0.0276 0.0256 0 0 0.1 0.1 No COPEC: EPC<ESV
Cadmium 7440-43-9 mg/L 0.000702 See Notes -- -- 2 0 2 0.0005 0.0005 -- 0.0005 0.0005 0 0 0.7 0.7 No COPEC: QL<ESV
Calcium 7440-70-2 mg/L 116 USEPA R4 26 21 3 3 0 0.025 0.025 ABL-SW013 26 23 0 0 0.2 0.2 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/L 0.07229 See Notes 0.0039 0.0039 2 1 1 0.0025 0.0025 ABL-SW006 0.0039 0.0032 0 0 0.1 0.0 No COPEC: EPC<ESV
Lead 7439-92-1 mg/L 0.00243 See Notes 0.0037 0.0037 2 1 1 0.0025 0.0025 ABL-SW006 0.0037 0.0031 1 2 1.5 1.3 Category 1/5: Max EPC>ESV
Magnesium 7439-95-4 mg/L 82 USEPA R4 12 7.4 3 3 0 0.033 0.033 ABL-SW013 12 10.13333 0 0 0.1 0.1 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/L 0.000012 NCDEQ -- -- 2 0 2 0.0001 0.0001 -- 0.0001 0.0001 0 2 8.3 8.3 Category 2: QL>ESV
Selenium 7782-49-2 mg/L 0.0151 NCDEQ -- -- 2 0 2 0.005 0.005 -- 0.005 0.005 0 0 0.3 0.3 No COPEC: QL<ESV
Silver 7440-22-4 mg/L 0.00006 NCDEQ -- -- 2 0 2 0.0025 0.0025 -- 0.0025 0.0025 0 2 41.7 41.7 Category 2: QL>ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/L -- -- -- -- 5 0 5 0.00042 0.0005 -- 0.0005 0.000484 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/L -- -- -- -- 5 0 5 0.00042 0.0005 -- 0.0005 0.000484 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/L -- -- -- -- 5 0 5 0.00042 0.0005 -- 0.0005 0.000484 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/L -- -- -- -- 5 0 5 0.00042 0.0005 -- 0.0005 0.000484 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/L -- -- -- -- 5 0 5 0.00042 0.0005 -- 0.0005 0.000484 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/L -- -- -- -- 5 0 5 0.00042 0.0005 -- 0.0005 0.000484 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/L -- -- -- -- 5 0 5 0.00042 0.0005 -- 0.0005 0.000484 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/L 0.000001 NCDEQ -- -- 5 0 5 0.00294 0.0035 -- 0.0035 0 0 0 3500.0 0.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/L 0.000001 NCDEQ -- -- 5 0 5 0.00294 0.0035 -- 0.0035 0.001694 5 5 3500.0 1694.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/L 0.000001 NCDEQ -- -- 5 0 5 0.00294 0.0035 -- 0.0035 0.003388 5 5 3500.0 3388.0 Category 2: QL>ESV
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 mg/L -- -- -- -- 3 0 3 2.5E-06 2.6E-06 -- 2.62E-06 2.57E-06 0 0 -- -- Category 4: No ESV & ND
PCB 12/13 E52450566 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 mg/L -- -- -- -- 3 0 3 3.4E-07 3.5E-07 -- 3.53E-07 3.47E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
1 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
PCB 18/30 E52450574 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
PCB 20/28 E52450582 mg/L -- -- -- -- 3 0 3 1.3E-06 1.4E-06 -- 1.38E-06 1.36E-06 0 0 -- -- Category 4: No ESV & ND
PCB 21/33 E52450590 mg/L -- -- -- -- 3 0 3 1.4E-06 1.4E-06 -- 1.44E-06 1.42E-06 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 mg/L -- -- -- -- 3 0 3 9.9E-07 1E-06 -- 1.02E-06 1E-06 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
PCB 26/29 E52450608 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 mg/L -- -- -- -- 3 0 3 1.4E-06 1.4E-06 -- 1.39E-06 1.37E-06 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 mg/L -- -- -- -- 3 0 3 5.5E-07 5.7E-07 -- 5.67E-07 5.57E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 mg/L -- -- -- -- 3 0 3 2.6E-07 2.7E-07 -- 2.67E-07 2.62E-07 0 0 -- -- Category 4: No ESV & ND
PCB 40/41/71 E52450616 mg/L -- -- -- -- 3 0 3 1.6E-06 1.6E-06 -- 0.0000016 1.57E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 43/73 (43/73) mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 44/47/65 E52450624 mg/L -- -- -- -- 3 0 3 1.6E-06 1.6E-06 -- 0.0000016 1.57E-06 0 0 -- -- Category 4: No ESV & ND
PCB 45/51 E52450632 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 49/69 E52450640 mg/L -- -- 1.1E-06 1.1E-06 3 1 2 1E-06 1.1E-06 ABL-SW013 1.07E-06 1.06E-06 0 0 -- -- Category 3: No ESV & Detect
PCB 50/53 E52450657 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 mg/L -- -- 1.7E-06 1.7E-06 3 1 2 1.6E-06 1.7E-06 ABL-SW013 1.67E-06 1.64E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 mg/L -- -- 5.9E-07 5.9E-07 3 1 2 5.2E-07 5.4E-07 ABL-SW013 5.9E-07 5.48E-07 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 59/62/75 E52450665 mg/L -- -- -- -- 3 0 3 1.6E-06 1.6E-06 -- 0.0000016 1.57E-06 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 61/70/74/76 E52450673 mg/L -- -- 2.3E-06 2.3E-06 3 1 2 2.1E-06 2.1E-06 ABL-SW013 2.25E-06 2.15E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 mg/L -- -- 7.8E-07 6E-07 3 3 0 5.2E-07 5.4E-07 ABL-SW013 7.76E-07 7.13E-07 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 mg/L -- -- 1.5E-06 1.1E-06 3 3 0 8.7E-07 9E-07 ABL-SW013 1.46E-06 1.31E-06 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
2 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 85/117/116 E52450699 mg/L -- -- -- -- 3 0 3 1.6E-06 1.6E-06 -- 0.0000016 1.57E-06 0 0 -- -- Category 4: No ESV & ND
PCB 86/87/97/108/119/125 E52450707 mg/L -- -- -- -- 3 0 3 3.1E-06 3.2E-06 -- 3.21E-06 3.15E-06 0 0 -- -- Category 4: No ESV & ND
PCB 88/91 E52450715 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 90/101/113 E52450723 mg/L -- -- -- -- 3 0 3 1.6E-06 1.6E-06 -- 0.0000016 1.57E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 93/98/100/102 (93/98/100/102) mg/L -- -- -- -- 3 0 3 2.1E-06 2.1E-06 -- 2.14E-06 2.1E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 mg/L -- -- -- -- 3 0 3 9.9E-07 1E-06 -- 1.02E-06 1E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 mg/L -- -- 6.6E-07 6.4E-07 3 2 1 5.2E-07 5.4E-07 ABL-SW013 6.55E-07 6.04E-07 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 mg/L -- -- 5.9E-07 5.9E-07 3 1 2 5.2E-07 5.4E-07 ABL-SW013 5.88E-07 5.47E-07 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 107/124 E52450749 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 110/115 E52450756 mg/L -- -- 1.4E-06 1.2E-06 3 2 1 1E-06 1.1E-06 ABL-SW013 0.0000014 1.21E-06 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 mg/L -- -- 1E-06 8.6E-07 3 2 1 6.6E-07 6.9E-07 ABL-SW013 1.04E-06 8.56E-07 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 128/166 E52450764 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
PCB 129/138/163 (129/138/163) mg/L -- -- -- -- 3 0 3 1.6E-06 1.6E-06 -- 0.0000016 1.57E-06 0 0 -- -- Category 4: No ESV & ND
3 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 134/143 E52450780 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
PCB 135/151 (135/151) mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 139/140 E52450806 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 147/149 E52450814 mg/L -- -- 1.2E-06 1.2E-06 3 1 2 1E-06 1.1E-06 ABL-SW014 1.17E-06 1.09E-06 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 153/168 E52450822 mg/L -- -- 1.4E-06 1.3E-06 3 2 1 1E-06 1.1E-06 ABL-SW014 0.0000014 1.25E-06 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 156/157 E52450830 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 171/173 E52450848 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 mg/L -- -- 6.5E-07 5.7E-07 3 2 1 5.2E-07 5.4E-07 ABL-SW014 6.48E-07 5.78E-07 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 180/193 E52450855 mg/L -- -- 1.3E-06 1.2E-06 3 2 1 1E-06 1.1E-06 ABL-SW014 1.33E-06 1.18E-06 0 0 -- -- Category 3: No ESV & Detect
4 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
PCB 183/185 E52450863 mg/L -- -- -- -- 3 0 3 1E-06 1.1E-06 -- 1.07E-06 1.05E-06 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 mg/L -- -- 8.1E-07 5.3E-07 3 3 0 5.2E-07 5.4E-07 ABL-SW014 8.06E-07 6.75E-07 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 mg/L -- -- -- -- 3 0 3 5.2E-07 5.4E-07 -- 5.35E-07 5.25E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
PCB 197/200 E52450871 mg/L -- -- -- -- 3 0 3 1.6E-06 1.6E-06 -- 0.0000016 1.57E-06 0 0 -- -- Category 4: No ESV & ND
PCB 198/199 E52450889 mg/L -- -- -- -- 3 0 3 1.6E-06 1.6E-06 -- 0.0000016 1.57E-06 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Decachlorobiphenyl (PCB 209) 2051-24-3 mg/L -- -- -- -- 3 0 3 7.8E-07 8E-07 -- 8.02E-07 7.88E-07 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Congeners) totPCB_congener_ND=0 mg/L 0.000001 NCDEQ 1.5E-05 2.2E-06 3 3 0 0.00011 0.00011 ABL-SW013 0.0001141 9.21E-06 3 3 114.1 9.2 Category 1/5: Max EPC>ESV
Total PCBs (Congeners) totPCB_congener_ND=QL/2 mg/L 0.000001 NCDEQ 6.5E-05 5.7E-05 3 3 0 0.00011 0.00011 ABL-SW013 0.0001141 6.15E-05 3 3 114.1 61.5 Category 1/5: Max EPC>ESV
Total PCBs (Congeners) totPCB_congener_ND=LOD mg/L 0.000001 NCDEQ 0.00012 0.00011 3 3 0 0.00011 0.00011 ABL-SW014 0.0001163 0.000114 3 3 116.3 113.8 Category 1/5: Max EPC>ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/L 0.056 See Notes -- -- 5 0 5 0.0005 0.0017 -- 0.0017 0.00098 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/L 0.307 See Notes -- -- 5 0 5 0.0005 0.0018 -- 0.0018 0.00102 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/L 0.021 See Notes -- -- 5 0 5 0.00005 0.0011 -- 0.0011 0.00047 0 0 0.1 0.0 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/L 0.0022 See Notes -- -- 5 0 5 0.00005 0.00072 -- 0.00072 0.000318 0 0 0.3 0.1 No COPEC: QL<ESV
Benzo[a]pyrene 50-32-8 mg/L 0.00096 See Notes -- -- 5 0 5 0.0001 0.00071 -- 0.00071 0.000344 0 0 0.7 0.4 No COPEC: QL<ESV
Benzo[b]fluoranthene 205-99-2 mg/L 0.00068 See Notes -- -- 5 0 5 0.00005 0.00081 -- 0.00081 0.000354 0 2 1.2 0.5 Category 2: QL>ESV
Benzo[g,h,i]perylene 191-24-2 mg/L 0.00044 See Notes -- -- 5 0 5 0.0002 0.00097 -- 0.00097 0.000508 0 2 2.2 1.2 Category 2: QL>ESV
Benzo[k]fluoranthene 207-08-9 mg/L 0.00064 See Notes -- -- 5 0 5 0.0002 0.00087 -- 0.00087 0.000468 0 2 1.4 0.7 Category 2: QL>ESV
Chrysene 218-01-9 mg/L 0.002 See Notes -- -- 5 0 5 0.0001 0.00065 -- 0.00065 0.00032 0 0 0.3 0.2 No COPEC: QL<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/L 0.00028 See Notes -- -- 5 0 5 0.00015 0.0007 -- 0.0007 0.00037 0 2 2.5 1.3 Category 2: QL>ESV
Fluoranthene 206-44-0 mg/L 0.0071 See Notes -- -- 5 0 5 0.0003 0.00087 -- 0.00087 0.000528 0 0 0.1 0.1 No COPEC: QL<ESV
Fluorene 86-73-7 mg/L 0.039 See Notes -- -- 5 0 5 0.00031 0.0016 -- 0.0016 0.000826 0 0 0.0 0.0 No COPEC: QL<ESV
5 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/L 0.00028 See Notes -- -- 5 0 5 0.00005 0.0018 -- 0.0018 0.00075 0 2 6.4 2.7 Category 2: QL>ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 5 0 5 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/L 0.019 See Notes -- -- 5 0 5 0.0002 0.001 -- 0.001 0.00052 0 0 0.1 0.0 No COPEC: QL<ESV
Pyrene 129-00-0 mg/L 0.01 See Notes -- -- 5 0 5 0.0001 0.00053 -- 0.00053 0.000272 0 0 0.1 0.0 No COPEC: QL<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/L -- -- -- -- 5 0 5 0.001 0.00776 -- 0.00776 0 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/L -- -- -- -- 5 0 5 0.001 0.00776 -- 0.00776 0.001852 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=LOD mg/L -- -- -- -- 5 0 5 0.001 0.00776 -- 0.00776 0.003704 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=0 mg/L -- -- -- -- 5 0 5 0.00336 0.00957 -- 0.00957 0 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/L -- -- -- -- 5 0 5 0.00336 0.00957 -- 0.00957 0.002922 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=LOD mg/L -- -- -- -- 5 0 5 0.00336 0.00957 -- 0.00957 0.005844 0 0 -- -- Category 4: No ESV & ND
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/L 0.075 See Notes -- -- 5 0 5 0.0018 0.002 -- 0.002 0.00192 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 2 0 2 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 2 0 2 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 2 0 2 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.1 0.1 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/L 0.11 NCDEQ -- -- 2 0 2 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorophenol 95-57-8 mg/L 0.018 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.1 0.1 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/L 0.072 See Notes -- -- 5 0 5 0.0017 0.002 -- 0.002 0.00188 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/L 0.067 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/L 0.017 USEPA R4 -- -- 2 0 2 0.0028 0.0028 -- 0.0028 0.0028 0 0 0.2 0.2 No COPEC: QL<ESV
2-Nitrophenol 88-75-5 mg/L 0.073 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/L 0.011 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.2 0.2 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/L 0.015 USEPA R4 -- -- 2 0 2 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/L 0.071 USEPA R4 -- -- 2 0 2 0.0065 0.0065 -- 0.0065 0.0065 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/L 0.044 USEPA R4 -- -- 2 0 2 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/L 0.0019 USEPA R4 -- -- 2 0 2 0.0022 0.0022 -- 0.0022 0.0022 0 2 1.2 1.2 Category 2: QL>ESV
2,4,6-Trichlorophenol 88-06-2 mg/L 0.0049 USEPA R4 -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.4 0.4 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/L 0.081 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/L 0.053 See Notes -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
3-Nitroaniline 99-09-2 mg/L -- -- -- -- 2 0 2 0.0024 0.0024 -- 0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/L 0.0045 USEPA R4 -- -- 2 0 2 0.0014 0.0014 -- 0.0014 0.0014 0 0 0.3 0.3 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/L 0.002 NCDEQ -- -- 2 0 2 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.7 0.7 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/L 0.001 USEPA R4 -- -- 2 0 2 0.0042 0.0042 -- 0.0042 0.0042 0 2 4.2 4.2 Category 2: QL>ESV
4-Chloroaniline 106-47-8 mg/L 0.0008 USEPA R4 -- -- 2 0 2 0.0034 0.0034 -- 0.0034 0.0034 0 2 4.3 4.3 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/L -- -- -- -- 2 0 2 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/L -- -- -- -- 2 0 2 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/L 0.058 USEPA R4 -- -- 2 0 2 0.0058 0.0058 -- 0.0058 0.0058 0 0 0.1 0.1 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/L -- -- -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/L 0.0041 USEPA R4 -- -- 2 0 2 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.3 0.3 No COPEC: QL<ESV
Benzoic acid 65-85-0 mg/L 9 NCDEQ -- -- 2 0 2 0.0111 0.0111 -- 0.0111 0.0111 0 0 0.0 0.0 No COPEC: QL<ESV
6 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Benzyl Alcohol 100-51-6 mg/L 0.5 NCDEQ -- -- 2 0 2 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/L 0.019 NCDEQ -- -- 2 0 2 0.00075 0.00075 -- 0.00075 0.00075 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/L 9.2 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/L -- -- -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/L -- -- -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/L 0.005 NCDEQ -- -- 2 0 2 0.00085 0.00085 -- 0.00085 0.00085 0 0 0.2 0.2 No COPEC: QL<ESV
Di-N-Butyl Phthalate 84-74-2 mg/L 0.0095 NCDEQ -- -- 2 0 2 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.1 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/L 0.215 USEPA R4 -- -- 2 0 2 0.00086 0.00086 -- 0.00086 0.00086 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/L 0.004 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.5 0.5 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/L 1.2 NCDEQ -- -- 2 0 2 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/L 3.4 NCDEQ -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/L 0.00015 USEPA R4 -- -- 2 0 2 0.0011 0.0011 -- 0.0011 0.0011 0 2 7.3 7.3 Category 2: QL>ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 2 1.8 1.8 Category 2: QL>ESV
Hexachlorocyclopentadiene 77-47-4 mg/L 0.00007 NCDEQ -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 2 25.7 25.7 Category 2: QL>ESV
Hexachloroethane 67-72-1 mg/L 0.012 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.1 0.1 No COPEC: QL<ESV
Isophorone 78-59-1 mg/L 0.92 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/L -- -- -- -- 2 0 2 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/L 17 NCDEQ -- -- 2 0 2 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodiphenylamine 86-30-6 mg/L 0.29 NCDEQ -- -- 2 0 2 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/L 4.6 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/L 0.015 USEPA R4 -- -- 2 0 2 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.2 0.2 No COPEC: QL<ESV
Phenol 108-95-2 mg/L 0.16 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/L 0.41 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/L 0.13 USEPA R4 -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/L -- -- -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/L 2.5 NCDEQ -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/L 0.085 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/L 2.3 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/L 0.2 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/L -- -- -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 mg/L -- -- -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/L 2 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-dichloroethene (cis+trans) 540-59-0 mg/L 0.97 USEPA R4 -- -- 2 0 2 0.0044 0.0044 -- 0.0044 0.0044 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/L 0.52 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/L 0.008 USEPA R4 -- -- 2 0 2 0.002 0.002 -- 0.002 0.002 0 0 0.3 0.3 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/L -- -- -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/L 0.39 NCDEQ -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
7 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
1,3-Dichloropropane 142-28-9 mg/L -- -- -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 mg/L 0.63 NCDEQ -- -- 2 0 2 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.2 0.2 No COPEC: QL<ESV
2-Chlorotoluene 95-49-8 mg/L -- -- -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/L 0.099 USEPA R4 -- -- 2 0 2 0.0038 0.0038 -- 0.0038 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/L -- -- -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
4-Chlorotoluene 106-43-4 mg/L -- -- -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/L 2 NCDEQ 0.01 0.01 2 1 1 0.01 0.01 ABL-ML003 0.01 0.01 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzene 71-43-2 mg/L 0.16 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/L -- -- -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/L -- -- -- -- 2 0 2 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/L 0.34 USEPA R4 -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/L 0.23 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/L 0.00004 NCDEQ -- -- 2 0 2 0.0025 0.0025 -- 0.0025 0.0025 0 2 62.5 62.5 Category 2: QL>ESV
Carbon Tetrachloride 56-23-5 mg/L 0.077 USEPA R4 -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/L 0.14 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/L -- -- -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/L 0.14 USEPA R4 -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/L -- -- -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/L 0.62 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/L 0.0017 USEPA R4 -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
8 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Dibromochloromethane 124-48-1 mg/L 0.32 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/L -- -- -- -- 2 0 2 0.002 0.002 -- 0.002 0.002 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/L -- -- -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/L 0.097 NCDEQ -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 2 1.8 1.8 Category 2: QL>ESV
Isopropyl Ether 108-20-3 mg/L 20 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Isopropylbenzene (Cumene) 98-82-8 mg/L 0.25 NCDEQ -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/L 0.42 See Notes -- -- 2 0 2 0.0031 0.0031 -- 0.0031 0.0031 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Ethyl Ketone 78-93-3 mg/L 26 NCDEQ -- -- 2 0 2 0.0049 0.0049 -- 0.0049 0.0049 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/L 26 NCDEQ -- -- 2 0 2 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/L 11 NCDEQ -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/L 0.0039 NCDEQ -- -- 2 0 2 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.5 0.5 No COPEC: QL<ESV
N-Propylbenzene 103-65-1 mg/L 0.08 NCDEQ -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 2 0 2 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene) 95-47-6 mg/L 0.6 NCDEQ -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
p-Cymene (p-Isopropyltoluene) 99-87-6 mg/L 0.32 NCDEQ -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/L -- -- -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/L 0.032 USEPA R4 -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/L -- -- -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Alcohol 75-65-0 mg/L -- -- -- -- 2 0 2 0.0577 0.0577 -- 0.0577 0.0577 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/L 34 NCDEQ -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/L 0.053 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/L 0.011 NCDEQ -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/L 0.558 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/L 0.0017 USEPA R4 -- -- 2 0 2 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Trichloroethylene 79-01-6 mg/L 0.22 USEPA R4 -- -- 2 0 2 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Trichlorofluoromethane 75-69-4 mg/L -- -- -- -- 2 0 2 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/L 0.016 USEPA R4 -- -- 2 0 2 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.1 0.1 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/L 0.93 USEPA R4 -- -- 2 0 2 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
9 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
General Chemistry
Alkalinity, Bicarbonate (As CaCO3) ALKB mg/L -- -- 170 150 3 3 0 5 5 ABL-SW014 170 160 0 0 -- -- Category 3: No ESV & Detect
Alkalinity, Carbonate (As CaCO3) ALKC mg/L -- -- -- -- 3 0 3 5 5 -- 5 5 0 0 -- -- Category 4: No ESV & ND
Alkalinity, Total (As CaCO3) ALK mg/L 20 USEPA R4 170 150 3 3 0 5 5 ABL-SW014 170 160 3 3 8.5 8.0 Category 1/5: Max EPC>ESV
Bromide 24959-67-9 mg/L -- -- 0.21 0.21 3 2 1 0.2 0.4
ABL-SW013,
ABL-SW014 0.4 0.273333 0 0 -- -- Category 3: No ESV & Detect
Chloride (As Cl) 16887-00-6 mg/L 230 NCDEQ 12 6.9 6 6 0 0.18 0.4 ABL-SW014 12 9.966667 0 0 0.1 0.0 No COPEC: EPC<ESV
Hardness (As CaCO3) HARD mg/L -- -- 110 83 3 3 0 3.3 3.3 ABL-SW013 110 97.66667 0 0 -- -- Category 3: No ESV & Detect
pH PH SU 20 USEPA R4 7.3 7 3 3 0 -- -- ABL-SW013 7.3 7.133333 0 0 0.4 0.4 No COPEC: EPC<ESV
Sulfate (As SO4) 14808-79-8 mg/L -- -- 69 24 3 3 0 0.4 0.8 ABL-SW014 69 53.33333 0 0 -- -- Category 3: No ESV & Detect
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References:
10 of 11
Table C-5
Summary Surface Water Screening - Eastern Drainage Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
11 of 11
Table C-6
Summary Sediment Screening - Eastern Drainge Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 1.4 1.4 1 1 0 0.45 0.45 ABL-SD006 1.4 1.4 0 0 -- -- Category 3: No ESV & Detect
Fluoride 16984-48-8 mg/kg -- -- -- -- 1 0 1 31.7 31.7 -- 31.7 31.7 0 0 -- -- Category 4: No ESV & ND
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 12.4 12.4 1 1 0 0.88 0.88 ABL-SD006 12.4 12.4 0 0 0.4 0.4 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 85.8 85.8 1 1 0 0.44 0.44 ABL-SD006 85.8 85.8 1 1 1.4 1.4 Category 1: Max EPC>ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.19 0.19 1 1 0 0.088 0.088 ABL-SD006 0.19 0.19 0 0 0.0 0.0 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 20.4 20.4 1 1 0 0.44 0.44 ABL-SD006 20.4 20.4 0 0 0.2 0.2 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 21.7 21.7 1 1 0 0.44 0.44 ABL-SD006 21.7 21.7 0 0 0.2 0.2 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.024 0.024 1 1 0 0.00019 0.00019 ABL-SD006 0.024 0.024 0 0 0.0 0.0 No COPEC: EPC<ESV
Selenium 7782-49-2 mg/kg 2.9 EPA R4 RSV -- -- 1 0 1 0.88 0.88 -- 0.88 0.88 0 0 0.3 0.3 No COPEC: QL<ESV
Silver 7440-22-4 mg/kg 2.2 EPA R4 RSV -- -- 1 0 1 0.44 0.44 -- 0.44 0.44 0 0 0.2 0.2 No COPEC: QL<ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/kg -- -- -- -- 4 0 4 0.0218 0.038 -- 0.038 0.027025 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/kg -- -- -- -- 4 0 4 0.0218 0.038 -- 0.038 0.027025 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/kg -- -- -- -- 4 0 4 0.0218 0.038 -- 0.038 0.027025 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/kg -- -- -- -- 4 0 4 0.0218 0.038 -- 0.038 0.027025 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/kg -- -- -- -- 4 0 4 0.0218 0.038 -- 0.038 0.027025 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/kg -- -- -- -- 4 0 4 0.0218 0.038 -- 0.038 0.027025 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/kg -- -- -- -- 4 0 4 0.0218 0.038 -- 0.038 0.027025 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/kg 0.676 EPA R4 RSV -- -- 4 0 4 0.1526 0.266 -- 0.266 0 0 0 0.4 0.0 No COPEC: QL<ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/kg 0.676 EPA R4 RSV -- -- 4 0 4 0.1526 0.266 -- 0.266 0.094588 0 0 0.4 0.1 No COPEC: QL<ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/kg 0.676 EPA R4 RSV -- -- 4 0 4 0.1526 0.266 -- 0.266 0.189175 0 0 0.4 0.3 No COPEC: QL<ESV
Chlorobiphenyl; 2- (PCB 1) 2051-60-7 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 3- (PCB 2) 2051-61-8 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Chlorobiphenyl; 4- (PCB 3) 2051-62-9 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,2'- (PCB 4) 13029-08-8 mg/kg -- -- 0.000159 0.0000668 3 2 1 0.000025 0.000025 ABL-SD011 0.000159 8.36E-05 0 0 -- -- Category 3: No ESV & Detect
Dichlorobiphenyl, 2,3- (PCB 5) 16605-91-7 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,3'- (PCB 6) 25569-80-6 mg/kg -- -- 0.000033 0.000033 3 1 2 0.000025 0.000025 ABL-SD011 0.000033 2.77E-05 0 0 -- -- Category 3: No ESV & Detect
Dichlorobiphenyl, 2,4- (PCB 7) 33284-50-3 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,4'- (PCB 8) 34883-43-7 mg/kg -- -- 0.000316 0.000108 3 2 1 0.000025 0.000025 ABL-SD011 0.000316 0.00015 0 0 -- -- Category 3: No ESV & Detect
Dichlorobiphenyl, 2,5- (PCB 9) 34883-39-1 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 2,6- (PCB 10) 33146-45-1 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,3'- (PCB 11) 2050-67-1 mg/kg -- -- -- -- 3 0 3 0.000245 0.000245 -- 0.000245 0.000245 0 0 -- -- Category 4: No ESV & ND
PCB 12/13 E52450566 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 3,5- (PCB 14) 34883-41-5 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Dichlorobiphenyl, 4,4'- (PCB 15) 2050-68-2 mg/kg -- -- 0.000101 0.0000652 3 2 1 0.000033 0.000033 ABL-SD011 0.000101 6.64E-05 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',3- (PCB 16) 38444-78-9 mg/kg -- -- 0.000165 0.000165 3 1 2 0.000025 0.000025 ABL-SD011 0.000165 7.17E-05 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',4- (PCB 17) 37680-66-3 mg/kg -- -- 0.000289 0.000102 3 2 1 0.000025 0.000025 ABL-SD011 0.000289 0.000139 0 0 -- -- Category 3: No ESV & Detect
PCB 18/30 E52450574 mg/kg -- -- 0.000179 0.000179 3 1 2 0.00005 0.00005 ABL-SD011 0.000179 0.000093 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,2',6- (PCB 19) 38444-73-4 mg/kg -- -- 0.000105 0.000105 3 1 2 0.000025 0.000025 ABL-SD011 0.000105 5.17E-05 0 0 -- -- Category 3: No ESV & Detect
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
1 of 9
Table C-6
Summary Sediment Screening - Eastern Drainge Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
PCB 20/28 E52450582 mg/kg -- -- 0.00148 0.000535 3 2 1 0.000129 0.000129 ABL-SD011 0.00148 0.000715 0 0 -- -- Category 3: No ESV & Detect
PCB 21/33 E52450590 mg/kg -- -- 0.00052 0.00052 3 1 2 0.000135 0.000135 ABL-SD011 0.00052 0.000263 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,3,4'- (PCB 22) 38444-85-8 mg/kg -- -- 0.000369 0.000369 3 1 2 0.000095 0.000095 ABL-SD011 0.000369 0.000186 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,3,5- (PCB 23) 55720-44-0 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3,6- (PCB 24) 55702-45-9 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 2,3',4- (PCB 25) 55712-37-3 mg/kg -- -- 0.0000421 0.0000421 3 1 2 0.000025 0.000025 ABL-SD011 0.0000421 3.07E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 26/29 E52450608 mg/kg -- -- 0.000123 0.000123 3 1 2 0.00005 0.00005 ABL-SD011 0.000123 7.43E-05 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,3',6- (PCB 27) 38444-76-7 mg/kg -- -- 0.0000423 0.0000423 3 1 2 0.000025 0.000025 ABL-SD011 0.0000423 3.08E-05 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,4',5- (PCB 31) 16606-02-3 mg/kg -- -- 0.00132 0.000354 3 2 1 0.00013 0.00013 ABL-SD011 0.00132 0.000601 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2,4',6- (PCB 32) 38444-77-8 mg/kg -- -- 0.000278 0.0000817 3 2 1 0.000025 0.000025 ABL-SD011 0.000278 0.000128 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 2',3,5- (PCB 34) 37680-68-5 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',4- (PCB 35) 37680-69-6 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,3',5- (PCB 36) 38444-87-0 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4,4'- (PCB 37) 38444-90-5 mg/kg -- -- 0.00049 0.00011 3 2 1 0.000053 0.000053 ABL-SD011 0.00049 0.000218 0 0 -- -- Category 3: No ESV & Detect
Trichlorobiphenyl, 3,4,5- (PCB 38) 53555-66-1 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
Trichlorobiphenyl, 3,4',5- (PCB 39) 38444-88-1 mg/kg -- -- -- -- 3 0 3 0.000025 0.000025 -- 0.000025 0.000025 0 0 -- -- Category 4: No ESV & ND
PCB 40/41/71 E52450616 mg/kg -- -- 0.00124 0.000334 3 2 1 0.00015 0.00015 ABL-SD011 0.00124 0.000575 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',3,4'- (PCB 42) 36559-22-5 mg/kg -- -- 0.000733 0.00018 3 2 1 0.00005 0.00005 ABL-SD011 0.000733 0.000321 0 0 -- -- Category 3: No ESV & Detect
PCB 43/73 (43/73) mg/kg -- -- 0.0000749 0.0000749 3 1 2 0.00005 0.00005 ABL-SD011 0.0000749 5.83E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 44/47/65 E52450624 mg/kg -- -- 0.00244 0.000715 3 2 1 0.00015 0.00015 ABL-SD011 0.00244 0.001102 0 0 -- -- Category 3: No ESV & Detect
PCB 45/51 E52450632 mg/kg -- -- 0.000387 0.000111 3 2 1 0.0001 0.0001 ABL-SD011 0.000387 0.000199 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',3,6'- (PCB 46) 41464-47-5 mg/kg -- -- 0.000118 0.000118 3 1 2 0.00005 0.00005 ABL-SD011 0.000118 7.27E-05 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',4,5- (PCB 48) 70362-47-9 mg/kg -- -- 0.000458 0.000122 3 2 1 0.00005 0.00005 ABL-SD011 0.000458 0.00021 0 0 -- -- Category 3: No ESV & Detect
PCB 49/69 E52450640 mg/kg -- -- 0.00176 0.000574 3 2 1 0.0001 0.0001 ABL-SD011 0.00176 0.000811 0 0 -- -- Category 3: No ESV & Detect
PCB 50/53 E52450657 mg/kg -- -- 0.000361 0.000114 3 2 1 0.0001 0.0001 ABL-SD011 0.000361 0.000192 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',5,5'- (PCB 52) 35693-99-3 mg/kg -- -- 0.00277 0.000821 3 2 1 0.000154 0.000154 ABL-SD011 0.00277 0.001248 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,2',6,6'- (PCB 54) 15968-05-5 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 55) 74338-24-2 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',4'- (PCB 56) 41464-43-1 mg/kg -- -- 0.00158 0.000379 3 2 1 0.00005 0.00005 ABL-SD011 0.00158 0.00067 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,3',5- (PCB 57) 70424-67-8 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3,3',5'- (PCB 58) 41464-49-7 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
PCB 59/62/75 E52450665 mg/kg -- -- 0.000207 0.000207 3 1 2 0.00015 0.00015 ABL-SD011 0.000207 0.000169 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4,4'- (PCB 60) 33025-41-1 mg/kg -- -- 0.000979 0.000177 3 2 1 0.00005 0.00005 ABL-SD011 0.000979 0.000402 0 0 -- -- Category 3: No ESV & Detect
PCB 61/70/74/76 E52450673 mg/kg -- -- 0.00605 0.00156 3 2 1 0.0002 0.0002 ABL-SD011 0.00605 0.002603 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4',5- (PCB 63) 74472-34-7 mg/kg -- -- 0.000172 0.0000516 3 2 1 0.00005 0.00005 ABL-SD011 0.000172 9.12E-05 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3,4',6- (PCB 64) 52663-58-8 mg/kg -- -- 0.00146 0.000426 3 2 1 0.00005 0.00005 ABL-SD011 0.00146 0.000645 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,4'- (PCB 66) 32598-10-0 mg/kg -- -- 0.00387 0.00104 3 2 1 0.000084 0.000084 ABL-SD011 0.00387 0.001665 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,5- (PCB 67) 73575-53-8 mg/kg -- -- 0.0000634 0.0000634 3 1 2 0.00005 0.00005 ABL-SD011 0.0000634 5.45E-05 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 2,3',4,5'- (PCB 68) 73575-52-7 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5,5'- (PCB 72) 41464-42-0 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 2,3',5',6- (PCB 73) 74338-23-1 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
2 of 9
Table C-6
Summary Sediment Screening - Eastern Drainge Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 mg/kg -- -- 0.000534 0.000097 3 2 1 0.00005 0.00005 ABL-SD011 0.000534 0.000227 0 0 -- -- Category 3: No ESV & Detect
Tetrachlorobiphenyl, 3,3',4,5- (PCB 78) 70362-49-1 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',4,5'- (PCB 79) 41464-48-6 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,3',5,5'- (PCB 80) 33284-52-5 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,3',4- (PCB 82) 52663-62-4 mg/kg -- -- 0.000797 0.000104 3 2 1 0.00005 0.00005 ABL-SD011 0.000797 0.000317 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,3',5- (PCB 83) 60145-20-2 mg/kg -- -- 0.000377 0.000377 3 1 2 0.00005 0.00005 ABL-SD011 0.000377 0.000159 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,3',6- (PCB 84) 52663-60-2 mg/kg -- -- 0.000709 0.000145 3 2 1 0.00005 0.00005 ABL-SD011 0.000709 0.000301 0 0 -- -- Category 3: No ESV & Detect
PCB 85/117/116 E52450699 mg/kg -- -- 0.00157 0.000264 3 2 1 0.00015 0.00015 ABL-SD011 0.00157 0.000661 0 0 -- -- Category 3: No ESV & Detect
PCB 86/87/97/108/119/125 E52450707 mg/kg -- -- 0.00348 0.000439 3 2 1 0.0003 0.0003 ABL-SD011 0.00348 0.001406 0 0 -- -- Category 3: No ESV & Detect
PCB 88/91 E52450715 mg/kg -- -- 0.000612 0.00014 3 2 1 0.0001 0.0001 ABL-SD011 0.000612 0.000284 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,4,6'- (PCB 89) 73575-57-2 mg/kg -- -- 0.0000882 0.0000882 3 1 2 0.00005 0.00005 ABL-SD011 0.0000882 6.27E-05 0 0 -- -- Category 3: No ESV & Detect
PCB 90/101/113 E52450723 mg/kg -- -- 0.00615 0.000601 3 2 1 0.00015 0.00015 ABL-SD011 0.00615 0.0023 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,5,5'- (PCB 92) 52663-61-3 mg/kg -- -- 0.000884 0.000123 3 2 1 0.00005 0.00005 ABL-SD011 0.000884 0.000352 0 0 -- -- Category 3: No ESV & Detect
PCB 93/98/100/102 (93/98/100/102) mg/kg -- -- 0.000239 0.000239 3 1 2 0.0002 0.0002 ABL-SD011 0.000239 0.000213 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,5,6'- (PCB 94) 73575-55-0 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',3,5',6- (PCB 95) 38379-99-6 mg/kg -- -- 0.00231 0.000378 3 2 1 0.000095 0.000095 ABL-SD011 0.00231 0.000928 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',3,6,6'- (PCB 96) 73575-54-9 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,4',5- (PCB 99) 38380-01-7 mg/kg -- -- 0.00288 0.000495 3 2 1 0.00005 0.00005 ABL-SD011 0.00288 0.001142 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,2',4,5',6- (PCB 103) 60145-21-3 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,2',4,6,6'- (PCB 104) 56558-16-8 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 mg/kg -- -- 0.0044 0.000408 3 2 1 0.00005 0.00005 ABL-SD011 0.0044 0.001619 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,5- (PCB 106) 70424-69-0 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
PCB 107/124 E52450749 mg/kg -- -- 0.000305 0.000305 3 1 2 0.0001 0.0001 ABL-SD011 0.000305 0.000168 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',4,6- (PCB 109) 74472-35-8 mg/kg -- -- 0.000545 0.0000608 3 2 1 0.00005 0.00005 ABL-SD011 0.000545 0.000219 0 0 -- -- Category 3: No ESV & Detect
PCB 110/115 E52450756 mg/kg -- -- 0.00529 0.000768 3 2 1 0.0001 0.0001 ABL-SD011 0.00529 0.002053 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3,3',5,5'- (PCB 111) 39635-32-0 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,3',5,6- (PCB 112) 74472-36-9 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 mg/kg -- -- 0.000388 0.000388 3 1 2 0.00005 0.00005 ABL-SD011 0.000388 0.000163 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 mg/kg -- -- 0.0081 0.000681 3 2 1 0.000064 0.000064 ABL-SD011 0.0081 0.002948 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2,3',4,5,5'- (PCB 120) 68194-12-7 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2,3',4,5',6- (PCB 121) 56558-18-0 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 2',3,3',4,5- (PCB 122) 76842-07-4 mg/kg -- -- 0.000162 0.000162 3 1 2 0.00005 0.00005 ABL-SD011 0.000162 8.73E-05 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 mg/kg -- -- 0.000297 0.000297 3 1 2 0.00005 0.00005 ABL-SD011 0.000297 0.000132 0 0 -- -- Category 3: No ESV & Detect
Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Pentachlorobiphenyl, 3,3',4,5,5'- (PCB 127) 39635-33-1 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
PCB 128/166 E52450764 mg/kg -- -- 0.00432 0.00432 3 1 2 0.0001 0.0001 ABL-SD011 0.00432 0.001507 0 0 -- -- Category 3: No ESV & Detect
PCB 129/138/163 (129/138/163) mg/kg -- -- 0.0495 0.000214 3 3 0 0.00015 0.00015 ABL-SD011 0.0495 0.016737 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',4,5'- (PCB 130) 52663-66-8 mg/kg -- -- 0.0012 0.0012 3 1 2 0.00005 0.00005 ABL-SD011 0.0012 0.000433 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',4,6- (PCB 131) 61798-70-7 mg/kg -- -- 0.00021 0.00021 3 1 2 0.00005 0.00005 ABL-SD011 0.00021 0.000103 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',4,6'- (PCB 132) 38380-05-1 mg/kg -- -- 0.0085 0.000114 3 2 1 0.00005 0.00005 ABL-SD011 0.0085 0.002888 0 0 -- -- Category 3: No ESV & Detect
3 of 9
Table C-6
Summary Sediment Screening - Eastern Drainge Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Hexachlorobiphenyl, 2,2',3,3',5,5'- (PCB 133) 35694-04-3 mg/kg -- -- 0.00045 0.00045 3 1 2 0.00005 0.00005 ABL-SD011 0.00045 0.000183 0 0 -- -- Category 3: No ESV & Detect
PCB 134/143 E52450780 mg/kg -- -- 0.00117 0.00117 3 1 2 0.0001 0.0001 ABL-SD011 0.00117 0.000457 0 0 -- -- Category 3: No ESV & Detect
PCB 135/151 (135/151) mg/kg -- -- 0.0153 0.000147 3 2 1 0.0001 0.0001 ABL-SD011 0.0153 0.005182 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,3',6,6'- (PCB 136) 38411-22-2 mg/kg -- -- 0.00296 0.00296 3 1 2 0.00005 0.00005 ABL-SD011 0.00296 0.00102 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4,4',5- (PCB 137) 35694-06-5 mg/kg -- -- 0.000386 0.000386 3 1 2 0.00005 0.00005 ABL-SD011 0.000386 0.000162 0 0 -- -- Category 3: No ESV & Detect
PCB 139/140 E52450806 mg/kg -- -- -- -- 3 0 3 0.0001 0.0001 -- 0.0001 0.0001 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5,5'- (PCB 141) 52712-04-6 mg/kg -- -- 0.0132 0.0000697 3 2 1 0.00005 0.00005 ABL-SD011 0.0132 0.00444 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4,5,6- (PCB 142) 41411-61-4 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4,5',6- (PCB 144) 68194-14-9 mg/kg -- -- 0.00229 0.00229 3 1 2 0.00005 0.00005 ABL-SD011 0.00229 0.000797 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4,6,6'- (PCB 145) 74472-40-5 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',5,5'- (PCB 146) 51908-16-8 mg/kg -- -- 0.00615 0.0000663 3 2 1 0.00005 0.00005 ABL-SD011 0.00615 0.002089 0 0 -- -- Category 3: No ESV & Detect
PCB 147/149 E52450814 mg/kg -- -- 0.0318 0.000287 3 2 1 0.0001 0.0001 ABL-SD011 0.0318 0.010729 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',3,4',5,6'- (PCB 148) 74472-41-6 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,4',6,6'- (PCB 150) 68194-08-1 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,2',3,5,6,6'- (PCB 152) 68194-09-2 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
PCB 153/168 E52450822 mg/kg -- -- 0.056 0.000187 3 3 0 0.0001 0.0001 ABL-SD011 0.056 0.018865 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',4,4',5,6'- (PCB 154) 60145-22-4 mg/kg -- -- 0.0000614 0.0000614 3 1 2 0.00005 0.00005 ABL-SD011 0.0000614 5.38E-05 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,2',4,4',6,6'- (PCB 155) 33979-03-2 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
PCB 156/157 E52450830 mg/kg -- -- 0.00383 0.00383 3 1 2 0.0001 0.0001 ABL-SD011 0.00383 0.001343 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3,3',4,4',6- (PCB 158) 74472-42-7 mg/kg -- -- 0.00397 0.00397 3 1 2 0.00005 0.00005 ABL-SD011 0.00397 0.001357 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3,3',4,5,5'- (PCB 159) 39635-35-3 mg/kg -- -- 0.00168 0.00168 3 1 2 0.00005 0.00005 ABL-SD011 0.00168 0.000593 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3,3',4,5,6- (PCB 160) 41411-62-5 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4,5',6- (PCB 161) 74472-43-8 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5,5'- (PCB 162) 39635-34-2 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Hexachlorobiphenyl, 2,3,3',4',5',6- (PCB 164) 74472-45-0 mg/kg -- -- 0.00262 0.00262 3 1 2 0.00005 0.00005 ABL-SD011 0.00262 0.000907 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3,3',5,5',6- (PCB 165) 74472-46-1 mg/kg -- -- 0.000223 0.000223 3 1 2 0.00005 0.00005 ABL-SD011 0.000223 0.000108 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 mg/kg -- -- 0.0013 0.0013 3 1 2 0.00005 0.00005 ABL-SD011 0.0013 0.000467 0 0 -- -- Category 3: No ESV & Detect
Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 mg/kg -- -- 0 0 3 1 2 0.00005 0.00005
ABL-SD010,
ABL-SD011, 0.00005 3.33E-05 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,4',5- (PCB 170) 35065-30-6 mg/kg -- -- 0.0436 0.000111 3 2 1 0.00005 0.00005 ABL-SD011 0.0436 0.014587 0 0 -- -- Category 3: No ESV & Detect
PCB 171/173 E52450848 mg/kg -- -- 0.0129 0.0129 3 1 2 0.0001 0.0001 ABL-SD011 0.0129 0.004367 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5,5'- (PCB 172) 52663-74-8 mg/kg -- -- 0.00807 0.00807 3 1 2 0.00005 0.00005 ABL-SD011 0.00807 0.002723 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5,6'- (PCB 174) 38411-25-5 mg/kg -- -- 0.0461 0.000126 3 2 1 0.00005 0.00005 ABL-SD011 0.0461 0.015425 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,5',6- (PCB 175) 40186-70-7 mg/kg -- -- 0.00189 0.00189 3 1 2 0.00005 0.00005 ABL-SD011 0.00189 0.000663 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4,6,6'- (PCB 176) 52663-65-7 mg/kg -- -- 0.00589 0.00589 3 1 2 0.00005 0.00005 ABL-SD011 0.00589 0.001997 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',4',5,6- (PCB 177) 52663-70-4 mg/kg -- -- 0.0266 0.0000779 3 2 1 0.00005 0.00005 ABL-SD011 0.0266 0.008909 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',5,5',6- (PCB 178) 52663-67-9 mg/kg -- -- 0.00967 0.00967 3 1 2 0.00005 0.00005 ABL-SD011 0.00967 0.003257 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,3',5,6,6'- (PCB 179) 52663-64-6 mg/kg -- -- 0.0185 0.0000514 3 2 1 0.00005 0.00005 ABL-SD011 0.0185 0.0062 0 0 -- -- Category 3: No ESV & Detect
PCB 180/193 E52450855 mg/kg -- -- 0.119 0.000117 3 3 0 0.0001 0.0001 ABL-SD011 0.119 0.039793 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,4,4',5,6- (PCB 181) 74472-47-2 mg/kg -- -- 0.0000749 0.0000749 3 1 2 0.00005 0.00005 ABL-SD011 0.0000749 5.83E-05 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,4,4',5,6'- (PCB 182) 60145-23-5 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
PCB 183/185 E52450863 mg/kg -- -- 0.0352 0.0352 3 1 2 0.0001 0.0001 ABL-SD011 0.0352 0.0118 0 0 -- -- Category 3: No ESV & Detect
4 of 9
Table C-6
Summary Sediment Screening - Eastern Drainge Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Heptachlorobiphenyl, 2,2',3,4,4',6,6'- (PCB 184) 74472-48-3 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4,5,6,6'- (PCB 186) 74472-49-4 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,2',3,4',5,5',6- (PCB 187) 52663-68-0 mg/kg -- -- 0.0591 0.0000609 3 3 0 0.00005 0.00005 ABL-SD011 0.0591 0.019783 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,2',3,4',5,6,6'- (PCB 188) 74487-85-7 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 mg/kg -- -- 0.00157 0.00157 3 1 2 0.00005 0.00005 ABL-SD011 0.00157 0.000557 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,3,3',4,4',5,6- (PCB 190) 41411-64-7 mg/kg -- -- 0.0112 0.0112 3 1 2 0.00005 0.00005 ABL-SD011 0.0112 0.003767 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,3,3',4,4',5',6- (PCB 191) 74472-50-7 mg/kg -- -- 0.00203 0.00203 3 1 2 0.00005 0.00005 ABL-SD011 0.00203 0.00071 0 0 -- -- Category 3: No ESV & Detect
Heptachlorobiphenyl, 2,3,3',4,5,5',6- (PCB 192) 74472-51-8 mg/kg -- -- -- -- 3 0 3 0.00005 0.00005 -- 0.00005 0.00005 0 0 -- -- Category 4: No ESV & ND
Octachlorobiphenyl, 2,2',3,3',4,4',5,5'- (PCB 194) 35694-08-7 mg/kg -- -- 0.0317 0.0317 3 1 2 0.000075 0.000075 ABL-SD011 0.0317 0.010617 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,3',4,4',5,6- (PCB 195) 52663-78-2 mg/kg -- -- 0.013 0.013 3 1 2 0.000075 0.000075 ABL-SD011 0.013 0.004383 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,3',4,4',5',6- (PCB 196) 42740-50-1 mg/kg -- -- 0.0177 0.0177 3 1 2 0.000075 0.000075 ABL-SD011 0.0177 0.00595 0 0 -- -- Category 3: No ESV & Detect
PCB 197/200 E52450871 mg/kg -- -- 0.00541 0.00541 3 1 2 0.00015 0.00015 ABL-SD011 0.00541 0.001903 0 0 -- -- Category 3: No ESV & Detect
PCB 198/199 E52450889 mg/kg -- -- 0.0351 0.0351 3 1 2 0.00015 0.00015 ABL-SD011 0.0351 0.0118 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,3',4,5',6,6'- (PCB 201) 40186-71-8 mg/kg -- -- 0.00462 0.00462 3 1 2 0.000075 0.000075 ABL-SD011 0.00462 0.00159 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,3',5,5',6,6'- (PCB 202) 2136-99-4 mg/kg -- -- 0.00554 0.00554 3 1 2 0.000075 0.000075 ABL-SD011 0.00554 0.001897 0 0 -- -- Category 3: No ESV & Detect
Octachlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 203) 52663-76-0 mg/kg -- -- 0.0202 0.0202 3 1 2 0.000075 0.000075 ABL-SD011 0.0202 0.006783 0 0 -- -- Category 3: No ESV & Detect
Octochlorobiphenyl, 2,2',3,4,4',5,6,6'- (PCB 204) 74472-52-9 mg/kg -- -- -- -- 3 0 3 0.000075 0.000075 -- 0.000075 0.000075 0 0 -- -- Category 4: No ESV & ND
Octochlorobiphenyl, 2,2',3,4,4',5,5',6- (PCB 205) 74472-53-0 mg/kg -- -- 0.0015 0.0015 3 1 2 0.000075 0.000075 ABL-SD011 0.0015 0.00055 0 0 -- -- Category 3: No ESV & Detect
Nonachlorobiphenyl, 2,2',3,3',4,4',5,5',6- (PCB 206) 40186-72-9 mg/kg -- -- 0.00666 0.00666 3 1 2 0.000075 0.000075 ABL-SD011 0.00666 0.00227 0 0 -- -- Category 3: No ESV & Detect
Nonachlorobiphenyl, 2,2',3,3',4,4',5,6,6'- (PCB 207) 52663-79-3 mg/kg -- -- 0.00117 0.00117 3 1 2 0.000075 0.000075 ABL-SD011 0.00117 0.00044 0 0 -- -- Category 3: No ESV & Detect
Nonachlorobiphenyl, 2,2',3,3',4,5,5',6,6'- (PCB 208) 52663-77-1 mg/kg -- -- 0.00143 0.00143 3 1 2 0.000075 0.000075 ABL-SD011 0.00143 0.000527 0 0 -- -- Category 3: No ESV & Detect
Decachlorobiphenyl (PCB 209) 2051-24-3 mg/kg -- -- 0.000113 0.000113 3 1 2 0.000075 0.000075 ABL-SD011 0.000113 8.77E-05 0 0 -- -- Category 3: No ESV & Detect
Total PCBs (Congeners) totPCB_congener_ND=0 mg/kg 0.676 EPA R4 RSV 0.8235102 0.0005789 3 3 0 0.010667 0.010667 ABL-SD011 0.8235102 0.279743 1 1 1.2 0.4 Category 1: Max EPC>ESV
Total PCBs (Congeners) totPCB_congener_ND=QL/2 mg/kg 0.676 EPA R4 RSV 0.8248327 0.0057124 3 3 0 0.010667 0.010667 ABL-SD011 0.8248327 0.282999 1 1 1.2 0.4 Category 1: Max EPC>ESV
Total PCBs (Congeners) totPCB_congener_ND=LOD mg/kg 0.676 EPA R4 RSV 0.8261552 0.0108459 3 3 0 0.010667 0.010667 ABL-SD011 0.8261552 0.286255 1 1 1.2 0.4 Category 1: Max EPC>ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg 9.82 EPA R4 RSV 0.0262 0.0035 4 2 2 0.0022 0.193 ABL-SD011 0.193 0.056225 0 0 0.0 0.0 No COPEC: EPC<ESV
Acenaphthylene 208-96-8 mg/kg 9.04 EPA R4 RSV -- -- 4 0 4 0.0019 0.198 -- 0.198 0.051025 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/kg 11.88 EPA R4 RSV 0.0563 0.0036 4 3 1 0.002 0.187 ABL-SD011 0.187 0.063575 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[a]anthracene 56-55-3 mg/kg 16.82 EPA R4 RSV 0.361 0.0171 4 4 0 0.001 0.155 ABL-SD006 0.361 0.176275 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[a]pyrene 50-32-8 mg/kg 19.3 EPA R4 RSV 0.485 0.0191 4 4 0 0.0016 0.16 ABL-SD006 0.485 0.217175 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[b]fluoranthene 205-99-2 mg/kg 19.58 EPA R4 RSV 0.609 0.0176 4 4 0 0.00096 0.144 ABL-SD006 0.609 0.238625 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[g,h,i]perylene 191-24-2 mg/kg 21.8 EPA R4 RSV 0.325 0.01 4 4 0 0.0037 0.213 ABL-SD006 0.325 0.126 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[k]fluoranthene 207-08-9 mg/kg 19.62 EPA R4 RSV 0.217 0.008 4 4 0 0.0022 0.165 ABL-SD006 0.217 0.08745 0 0 0.0 0.0 No COPEC: EPC<ESV
Chrysene 218-01-9 mg/kg 16.88 EPA R4 RSV 0.406 0.0162 4 4 0 0.0026 0.111 ABL-SD006 0.406 0.17835 0 0 0.0 0.0 No COPEC: EPC<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/kg 22.4 EPA R4 RSV 0.0131 0.0131 4 1 3 0.0026 0.177 ABL-SD011 0.177 0.04885 0 0 0.0 0.0 No COPEC: EPC<ESV
Fluoranthene 206-44-0 mg/kg 14.14 EPA R4 RSV 0.632 0.0232 4 4 0 0.0012 0.122 ABL-SD006 0.632 0.272525 0 0 0.0 0.0 No COPEC: EPC<ESV
Fluorene 86-73-7 mg/kg 10.76 EPA R4 RSV 0.0215 0.0028 4 2 2 0.0023 0.172 ABL-SD011 0.172 0.04965 0 0 0.0 0.0 No COPEC: EPC<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg 22.4 EPA R4 RSV 0.247 0.0093 4 4 0 0.004 0.172 ABL-SD006 0.247 0.10375 0 0 0.0 0.0 No COPEC: EPC<ESV
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV 0.0059 0.0059 4 1 3 0.0033 0.205 ABL-SD011 0.205 0.0544 0 0 0.0 0.0 No COPEC: EPC<ESV
Phenanthrene 85-01-8 mg/kg 11.92 EPA R4 RSV 0.386 0.014 4 4 0 0.0022 0.139 ABL-SD006 0.386 0.166125 0 0 0.0 0.0 No COPEC: EPC<ESV
5 of 9
Table C-6
Summary Sediment Screening - Eastern Drainge Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Pyrene 129-00-0 mg/kg 13.94 EPA R4 RSV 0.553 0.0181 4 4 0 0.0026 0.142 ABL-SD006 0.553 0.23065 0 0 0.0 0.0 No COPEC: EPC<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/kg -- -- 3.203 0.1154 4 4 0 0.02126 1.439 ABL-SD006 3.203 1.36155 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg -- -- 3.2915 0.1167 4 4 0 0.02126 1.439 ABL-SD006 3.2915 1.384338 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg -- -- 3.38 0.118 4 4 0 0.02126 1.439 ABL-SD006 3.38 1.407125 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg -- -- 1.018 0.0408 4 4 0 0.0151 1.216 ABL-SD006 1.216 0.47045 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg -- -- 1.4955 0.04565 4 4 0 0.0151 1.216 ABL-SD006 1.4955 0.591988 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg -- -- 1.973 0.0505 4 4 0 0.0151 1.216 ABL-SD006 1.973 0.713525 0 0 -- -- Category 3: No ESV & Detect
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg 8.92 EPA R4 RSV 0.0027 0.0027 4 1 3 0.0017 0.218 ABL-SD011 0.218 0.05605 0 0 0.0 0.0 No COPEC: EPC<ESV
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 1 0 1 0.223 0.223 -- 0.223 0.223 0 0 0.2 0.2 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 1 0 1 0.162 0.162 -- 0.162 0.162 0 0 0.2 0.2 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.19 0.19 -- 0.19 0.19 0 0 0.2 0.2 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.236 0.236 -- 0.236 0.236 0 0 0.3 0.3 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/kg -- -- -- -- 1 0 1 0.165 0.165 -- 0.165 0.165 0 0 -- -- Category 4: No ESV & ND
2-Chlorophenol 95-57-8 mg/kg 0.55 EPA R4 RSV -- -- 1 0 1 0.228 0.228 -- 0.228 0.228 0 0 0.4 0.4 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/kg 8.94 EPA R4 RSV 0.0042 0.0023 4 2 2 0.0016 0.18 ABL-SD011 0.18 0.047025 0 0 0.0 0.0 No COPEC: EPC<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/kg 3.546 EPA R4 RSV -- -- 1 0 1 0.253 0.253 -- 0.253 0.253 0 0 0.1 0.1 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/kg -- -- -- -- 1 0 1 0.258 0.258 -- 0.258 0.258 0 0 -- -- Category 4: No ESV & ND
2-Nitrophenol 88-75-5 mg/kg 7.178 EPA R4 RSV -- -- 1 0 1 0.203 0.203 -- 0.203 0.203 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/kg 3.772 EPA R4 RSV -- -- 1 0 1 0.182 0.182 -- 0.182 0.182 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/kg 2.874 EPA R4 RSV -- -- 1 0 1 0.329 0.329 -- 0.329 0.329 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/kg 5.922 EPA R4 RSV -- -- 1 0 1 0.137 0.137 -- 0.137 0.137 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/kg 2.9 EPA R4 RSV -- -- 1 0 1 0.157 0.157 -- 0.157 0.157 0 0 0.1 0.1 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/kg 3.928 EPA R4 RSV -- -- 1 0 1 0.258 0.258 -- 0.258 0.258 0 0 0.1 0.1 No COPEC: QL<ESV
2,4,6-Trichlorophenol 88-06-2 mg/kg 3.928 EPA R4 RSV -- -- 1 0 1 0.185 0.185 -- 0.185 0.185 0 0 0.0 0.0 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/kg 0.262 EPA R4 RSV -- -- 1 0 1 0.175 0.175 -- 0.175 0.175 0 0 0.7 0.7 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/kg -- -- -- -- 1 0 1 0.329 0.329 -- 0.329 0.329 0 0 -- -- Category 4: No ESV & ND
3-Nitroaniline 99-09-2 mg/kg -- -- -- -- 1 0 1 0.228 0.228 -- 0.228 0.228 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/kg 0.18 EPA R4 RSV -- -- 1 0 1 0.182 0.182 -- 0.182 0.182 0 1 1.0 1.0 Category 2: QL>ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/kg 0.124 EPA R4 RSV -- -- 1 0 1 0.152 0.152 -- 0.152 0.152 0 1 1.2 1.2 Category 2: QL>ESV
4-Chloro-3-Methylphenol 59-50-7 mg/kg 4.07 EPA R4 RSV -- -- 1 0 1 0.172 0.172 -- 0.172 0.172 0 0 0.0 0.0 No COPEC: QL<ESV
4-Chloroaniline 106-47-8 mg/kg 0.042 EPA R4 RSV -- -- 1 0 1 0.233 0.233 -- 0.233 0.233 0 1 5.5 5.5 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/kg -- -- -- -- 1 0 1 0.172 0.172 -- 0.172 0.172 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/kg -- -- -- -- 1 0 1 0.236 0.236 -- 0.236 0.236 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/kg 8.21 EPA R4 RSV -- -- 1 0 1 0.149 0.149 -- 0.149 0.149 0 0 0.0 0.0 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/kg 4.608 EPA R4 RSV -- -- 1 0 1 0.167 0.167 -- 0.167 0.167 0 0 0.0 0.0 No COPEC: QL<ESV
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/kg 0.024 EPA R4 RSV -- -- 1 0 1 0.225 0.225 -- 0.225 0.225 0 1 9.4 9.4 Category 2: QL>ESV
Benzoic acid 65-85-0 mg/kg 4 EPA R4 RSV -- -- 1 0 1 0.152 0.152 -- 0.152 0.152 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Alcohol 100-51-6 mg/kg 13.458 EPA R4 RSV -- -- 1 0 1 0.167 0.167 -- 0.167 0.167 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/kg 0.962 EPA R4 RSV -- -- 1 0 1 0.177 0.177 -- 0.177 0.177 0 0 0.2 0.2 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/kg -- -- -- -- 1 0 1 0.195 0.195 -- 0.195 0.195 0 0 -- -- Category 4: No ESV & ND
6 of 9
Table C-6
Summary Sediment Screening - Eastern Drainge Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/kg 16.326 EPA R4 RSV -- -- 1 0 1 0.213 0.213 -- 0.213 0.213 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/kg -- -- -- -- 1 0 1 0.223 0.223 -- 0.223 0.223 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/kg 5.2 EPA R4 RSV -- -- 1 0 1 0.228 0.228 -- 0.228 0.228 0 0 0.0 0.0 No COPEC: QL<ESV
Di-N-Butyl Phthalate 84-74-2 mg/kg 0.638 EPA R4 RSV -- -- 1 0 1 0.137 0.137 -- 0.137 0.137 0 0 0.2 0.2 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/kg 2.2 EPA R4 RSV -- -- 1 0 1 0.175 0.175 -- 0.175 0.175 0 0 0.1 0.1 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/kg 4.626 EPA R4 RSV -- -- 1 0 1 0.137 0.137 -- 0.137 0.137 0 0 0.0 0.0 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/kg 2.21 EPA R4 RSV -- -- 1 0 1 0.129 0.129 -- 0.129 0.129 0 0 0.1 0.1 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/kg 4.062 EPA R4 RSV -- -- 1 0 1 0.17 0.17 -- 0.17 0.17 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/kg 0.48 EPA R4 RSV -- -- 1 0 1 0.106 0.106 -- 0.106 0.106 0 0 0.2 0.2 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 1 0 1 0.144 0.144 -- 0.144 0.144 0 0 -- -- Category 4: No ESV & ND
Hexachlorocyclopentadiene 77-47-4 mg/kg 0.81 EPA R4 RSV -- -- 1 0 1 0.155 0.155 -- 0.155 0.155 0 0 0.2 0.2 No COPEC: QL<ESV
Hexachloroethane 67-72-1 mg/kg 0.15 EPA R4 RSV -- -- 1 0 1 0.22 0.22 -- 0.22 0.22 0 1 1.5 1.5 Category 2: QL>ESV
Isophorone 78-59-1 mg/kg 1.896 EPA R4 RSV -- -- 1 0 1 0.187 0.187 -- 0.187 0.187 0 0 0.1 0.1 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/kg -- -- -- -- 1 0 1 0.16 0.16 -- 0.16 0.16 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/kg -- -- -- -- 1 0 1 0.271 0.271 -- 0.271 0.271 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodiphenylamine 86-30-6 mg/kg 0.74 EPA R4 RSV -- -- 1 0 1 0.248 0.248 -- 0.248 0.248 0 0 0.3 0.3 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/kg 18.014 EPA R4 RSV -- -- 1 0 1 0.228 0.228 -- 0.228 0.228 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/kg 1.2 EPA R4 RSV -- -- 1 0 1 0.152 0.152 -- 0.152 0.152 0 0 0.1 0.1 No COPEC: QL<ESV
Phenol 108-95-2 mg/kg 0.21 EPA R4 RSV -- -- 1 0 1 0.251 0.251 -- 0.251 0.251 0 1 1.2 1.2 Category 2: QL>ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/kg 3.332 EPA R4 RSV -- -- 1 0 1 0.0037 0.0037 -- 0.0037 0.0037 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/kg 1.506 EPA R4 RSV -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/kg -- -- -- -- 1 0 1 0.0037 0.0037 -- 0.0037 0.0037 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/kg 0.734 EPA R4 RSV -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/kg 0.836 EPA R4 RSV -- -- 1 0 1 0.0052 0.0052 -- 0.0052 0.0052 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/kg 3.09 EPA R4 RSV -- -- 1 0 1 0.0052 0.0052 -- 0.0052 0.0052 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/kg 4.46 EPA R4 RSV -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/kg -- -- -- -- 1 0 1 0.009 0.009 -- 0.009 0.009 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 mg/kg -- -- -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/kg 2.262 EPA R4 RSV -- -- 1 0 1 0.0055 0.0055 -- 0.0055 0.0055 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/kg 1.752 EPA R4 RSV -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/kg 0.99 EPA R4 RSV -- -- 1 0 1 0.0055 0.0055 -- 0.0055 0.0055 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/kg -- -- -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/kg 0.722 EPA R4 RSV -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/kg -- -- -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 mg/kg 0.708 EPA R4 RSV -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorotoluene 95-49-8 mg/kg -- -- -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 -- -- Category 4: No ESV & ND
7 of 9
Table C-6
Summary Sediment Screening - Eastern Drainge Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
2-Hexanone 591-78-6 mg/kg 15.196 EPA R4 RSV -- -- 1 0 1 0.0097 0.0097 -- 0.0097 0.0097 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/kg -- -- -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 -- -- Category 4: No ESV & ND
4-Chlorotoluene 106-43-4 mg/kg -- -- -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/kg 76.266 EPA R4 RSV -- -- 1 0 1 0.025 0.025 -- 0.025 0.025 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/kg 4.37 EPA R4 RSV -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/kg -- -- -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/kg -- -- -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/kg 0.42 EPA R4 ESV -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/kg 0.284 EPA R4 ESV -- -- 1 0 1 0.0057 0.0057 -- 0.0057 0.0057 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/kg 0.013 EPA R4 ESV -- -- 1 0 1 0.0062 0.0062 -- 0.0062 0.0062 0 0 0.5 0.5 No COPEC: QL<ESV
Carbon Tetrachloride 56-23-5 mg/kg 1.412 EPA R4 RSV -- -- 1 0 1 0.0065 0.0065 -- 0.0065 0.0065 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/kg 1.878 EPA R4 RSV -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/kg -- -- -- -- 1 0 1 0.006 0.006 -- 0.006 0.006 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/kg 6.704 EPA R4 RSV -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/kg -- -- -- -- 1 0 1 0.006 0.006 -- 0.006 0.006 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/kg 2.27 EPA R4 RSV -- -- 1 0 1 0.0035 0.0035 -- 0.0035 0.0035 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/kg -- -- -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 -- -- Category 4: No ESV & ND
Dibromochloromethane 124-48-1 mg/kg 0.396 EPA R4 ESV -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/kg -- -- -- -- 1 0 1 0.0062 0.0062 -- 0.0062 0.0062 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/kg -- -- -- -- 1 0 1 0.009 0.009 -- 0.009 0.009 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/kg 2.934 EPA R4 RSV -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 -- -- Category 4: No ESV & ND
Isopropyl Ether 108-20-3 mg/kg -- -- -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 -- -- Category 4: No ESV & ND
Isopropylbenzene (Cumene) 98-82-8 mg/kg 1.426 EPA R4 RSV -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/kg -- -- -- -- 1 0 1 0.009 0.009 -- 0.009 0.009 0 0 -- -- Category 4: No ESV & ND
Methyl Ethyl Ketone 78-93-3 mg/kg 45.414 EPA R4 RSV -- -- 1 0 1 0.0072 0.0072 -- 0.0072 0.0072 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/kg 16.33 EPA R4 RSV -- -- 1 0 1 0.0092 0.0092 -- 0.0092 0.0092 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/kg 4.808 EPA R4 RSV -- -- 1 0 1 0.0075 0.0075 -- 0.0075 0.0075 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/kg -- -- -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 -- -- Category 4: No ESV & ND
N-Propylbenzene 103-65-1 mg/kg -- -- -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 -- -- Category 4: No ESV & ND
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV -- -- 1 0 1 0.003 0.003 -- 0.003 0.003 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene) 95-47-6 mg/kg -- -- -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 -- -- Category 4: No ESV & ND
p-Cymene (p-Isopropyltoluene) 99-87-6 mg/kg 0.484 EPA R4 RSV -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/kg -- -- -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/kg 3.242 EPA R4 RSV -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 0.0 0.0 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/kg -- -- -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/kg 8.866 EPA R4 RSV -- -- 1 0 1 0.0037 0.0037 -- 0.0037 0.0037 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/kg 0.83 EPA R4 RSV -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/kg 4.148 EPA R4 RSV -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/kg 2.27 EPA R4 RSV -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/kg -- -- -- -- 1 0 1 0.0037 0.0037 -- 0.0037 0.0037 0 0 -- -- Category 4: No ESV & ND
8 of 9
Table C-6
Summary Sediment Screening - Eastern Drainge Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances
Hazard
Quotients
COPEC Selection
Ecological Screening
Level Detected Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Trichloroethylene 79-01-6 mg/kg 1.384 EPA R4 RSV -- -- 1 0 1 0.0052 0.0052 -- 0.0052 0.0052 0 0 0.0 0.0 No COPEC: QL<ESV
Trichlorofluoromethane 75-69-4 mg/kg -- -- -- -- 1 0 1 0.0055 0.0055 -- 0.0055 0.0055 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/kg 4.46 EPA R4 RSV -- -- 1 0 1 0.022 0.022 -- 0.022 0.022 0 0 0.0 0.0 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/kg 2.356 EPA R4 RSV -- -- 1 0 1 0.0045 0.0045 -- 0.0045 0.0045 0 0 0.0 0.0 No COPEC: QL<ESV
Xylenes 1330-20-7 mg/kg 2.148 EPA R4 RSV -- -- 1 0 1 0.009 0.009 -- 0.009 0.009 0 0 0.0 0.0 No COPEC: QL<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 60.5 31.2 4 4 0 0.1 0.1 ABL-SD006 60.5 41.725 0 0 -- -- Category 3: No ESV & Detect
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
RSV - Refined screening value
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
9 of 9
Table C-7
Summary Surface Water Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/L 0.005 NCDEQ -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 0.8 0.8
Fluoride 16984-48-8 mg/L 1.8 NCDEQ -- -- 1 0 1 0.25 0.25 -- 0.25 0.25 0 0 0.1 0.1
Metals
Arsenic 7440-38-2 mg/L 0.15 NCDEQ -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0146 0.0146 1 1 0 0.0025 0.0025 ABL-SW004 0.0146 0.0146 0 0 0.1 0.1 No COPEC: EPC<ESV
Cadmium 7440-43-9 mg/L 0.000702 See Notes -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 0.7 0.7 No COPEC: QL<ESV
Chromium, total 7440-47-3 mg/L 0.07229 See Notes 0.0029 0.0029 1 1 0 0.0025 0.0025 ABL-SW004 0.0029 0.0029 0 0 0.0 0.0 No COPEC: EPC<ESV
Lead 7439-92-1 mg/L 0.00243 See Notes -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 1 1.0 1.0 Category 2: QL>ESV
Mercury 7439-97-6 mg/L 0.000012 NCDEQ -- -- 1 0 1 0.0001 0.0001 -- 0.0001 0.0001 0 1 8.3 8.3 Category 2: QL>ESV
Selenium 7782-49-2 mg/L 0.0151 NCDEQ -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.3 0.3 No COPEC: QL<ESV
Silver 7440-22-4 mg/L 0.00006 NCDEQ -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 1 41.7 41.7 Category 2: QL>ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.007 0.007 -- 0.007 0 0 0 7000.0 0.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.007 0.007 -- 0.007 0.0035 1 1 7000.0 3500.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/L 0.000001 NCDEQ -- -- 1 0 1 0.007 0.007 -- 0.007 0.007 1 1 7000.0 7000.0 Category 2: QL>ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/L 0.056 See Notes -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/L 0.307 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/L 0.021 See Notes -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.1 0.1 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/L 0.0022 See Notes -- -- 1 0 1 0.00072 0.00072 -- 0.00072 0.00072 0 0 0.3 0.3 No COPEC: QL<ESV
Benzo[a]pyrene 50-32-8 mg/L 0.00096 See Notes -- -- 1 0 1 0.00071 0.00071 -- 0.00071 0.00071 0 0 0.7 0.7 No COPEC: QL<ESV
Benzo[b]fluoranthene 205-99-2 mg/L 0.00068 See Notes -- -- 1 0 1 0.00081 0.00081 -- 0.00081 0.00081 0 1 1.2 1.2 Category 2: QL>ESV
Benzo[g,h,i]perylene 191-24-2 mg/L 0.00044 See Notes -- -- 1 0 1 0.00097 0.00097 -- 0.00097 0.00097 0 1 2.2 2.2 Category 2: QL>ESV
Benzo[k]fluoranthene 207-08-9 mg/L 0.00064 See Notes -- -- 1 0 1 0.00087 0.00087 -- 0.00087 0.00087 0 1 1.4 1.4 Category 2: QL>ESV
Chrysene 218-01-9 mg/L 0.002 See Notes -- -- 1 0 1 0.00065 0.00065 -- 0.00065 0.00065 0 0 0.3 0.3 No COPEC: QL<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/L 0.00028 See Notes -- -- 1 0 1 0.0007 0.0007 -- 0.0007 0.0007 0 1 2.5 2.5 Category 2: QL>ESV
Fluoranthene 206-44-0 mg/L 0.0071 See Notes -- -- 1 0 1 0.00087 0.00087 -- 0.00087 0.00087 0 0 0.1 0.1 No COPEC: QL<ESV
Fluorene 86-73-7 mg/L 0.039 See Notes -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/L 0.00028 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 6.4 6.4 Category 2: QL>ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/L 0.019 See Notes -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.1 0.1 No COPEC: QL<ESV
Pyrene 129-00-0 mg/L 0.01 See Notes -- -- 1 0 1 0.00053 0.00053 -- 0.00053 0.00053 0 0 0.1 0.1 No COPEC: QL<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/L -- -- -- -- 1 0 1 0.00776 0.00776 -- 0.00776 0 0 0 -- -- Category 4: No ESV & ND
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
1 of 5
Table C-7
Summary Surface Water Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/L -- -- -- -- 1 0 1 0.00776 0.00776 -- 0.00776 0.00388 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=LOD mg/L -- -- -- -- 1 0 1 0.00776 0.00776 -- 0.00776 0.00776 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=0 mg/L -- -- -- -- 1 0 1 0.00957 0.00957 -- 0.00957 0 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/L -- -- -- -- 1 0 1 0.00957 0.00957 -- 0.00957 0.004785 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=LOD mg/L -- -- -- -- 1 0 1 0.00957 0.00957 -- 0.00957 0.00957 0 0 -- -- Category 4: No ESV & ND
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/L 0.075 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.1 0.1 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/L 0.11 NCDEQ -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorophenol 95-57-8 mg/L 0.018 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.1 0.1 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/L 0.072 See Notes -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/L 0.067 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/L 0.017 USEPA R4 -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 0.2 0.2 No COPEC: QL<ESV
2-Nitrophenol 88-75-5 mg/L 0.073 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/L 0.011 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.2 0.2 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/L 0.015 USEPA R4 -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/L 0.071 USEPA R4 -- -- 1 0 1 0.0065 0.0065 -- 0.0065 0.0065 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/L 0.044 USEPA R4 -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/L 0.0019 USEPA R4 -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 1 1.2 1.2 Category 2: QL>ESV
2,4,6-Trichlorophenol 88-06-2 mg/L 0.0049 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.4 0.4 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/L 0.081 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/L 0.053 See Notes -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
3-Nitroaniline 99-09-2 mg/L -- -- -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/L 0.0045 USEPA R4 -- -- 1 0 1 0.0014 0.0014 -- 0.0014 0.0014 0 0 0.3 0.3 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/L 0.002 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.7 0.7 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 1 4.2 4.2 Category 2: QL>ESV
4-Chloroaniline 106-47-8 mg/L 0.0008 USEPA R4 -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 1 4.3 4.3 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/L -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/L -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/L 0.058 USEPA R4 -- -- 1 0 1 0.0058 0.0058 -- 0.0058 0.0058 0 0 0.1 0.1 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/L 0.0041 USEPA R4 -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.3 0.3 No COPEC: QL<ESV
Benzoic acid 65-85-0 mg/L 9 NCDEQ -- -- 1 0 1 0.0111 0.0111 -- 0.0111 0.0111 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Alcohol 100-51-6 mg/L 0.5 NCDEQ -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/L 0.019 NCDEQ -- -- 1 0 1 0.00075 0.00075 -- 0.00075 0.00075 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/L 9.2 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
2 of 5
Table C-7
Summary Surface Water Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/L 0.005 NCDEQ -- -- 1 0 1 0.00085 0.00085 -- 0.00085 0.00085 0 0 0.2 0.2 No COPEC: QL<ESV
Di-N-Butyl Phthalate 84-74-2 mg/L 0.0095 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.1 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/L 0.215 USEPA R4 -- -- 1 0 1 0.00086 0.00086 -- 0.00086 0.00086 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/L 0.004 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.5 0.5 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/L 1.2 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/L 3.4 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/L 0.00015 USEPA R4 -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 1 7.3 7.3 Category 2: QL>ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 1.8 1.8 Category 2: QL>ESV
Hexachlorocyclopentadiene 77-47-4 mg/L 0.00007 NCDEQ -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 25.7 25.7 Category 2: QL>ESV
Hexachloroethane 67-72-1 mg/L 0.012 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.1 0.1 No COPEC: QL<ESV
Isophorone 78-59-1 mg/L 0.92 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/L -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/L 17 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodiphenylamine 86-30-6 mg/L 0.29 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/L 4.6 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/L 0.015 USEPA R4 -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.2 0.2 No COPEC: QL<ESV
Phenol 108-95-2 mg/L 0.16 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/L 0.41 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/L 0.13 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/L 2.5 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/L 0.085 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/L 2.3 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/L 0.2 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/L 2 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-dichloroethene (cis+trans) 540-59-0 mg/L 0.97 USEPA R4 -- -- 1 0 1 0.0044 0.0044 -- 0.0044 0.0044 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/L 0.52 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/L 0.008 USEPA R4 -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.3 0.3 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 mg/L 0.63 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.2 0.2 No COPEC: QL<ESV
2-Chlorotoluene 95-49-8 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/L 0.099 USEPA R4 -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
3 of 5
Table C-7
Summary Surface Water Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
2,2-Dichloropropane 594-20-7 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
4-Chlorotoluene 106-43-4 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/L 2 NCDEQ -- -- 1 0 1 0.01 0.01 -- 0.01 0.01 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/L 0.16 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/L -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/L 0.34 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/L 0.23 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/L 0.00004 NCDEQ -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 1 62.5 62.5 Category 2: QL>ESV
Carbon Tetrachloride 56-23-5 mg/L 0.077 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/L 0.14 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/L 0.14 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/L 0.62 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/L 0.0017 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Dibromochloromethane 124-48-1 mg/L 0.32 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/L -- -- -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/L 0.097 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 1.8 1.8 Category 2: QL>ESV
Isopropyl Ether 108-20-3 mg/L 20 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Isopropylbenzene (Cumene) 98-82-8 mg/L 0.25 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/L 0.42 See Notes -- -- 1 0 1 0.0031 0.0031 -- 0.0031 0.0031 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Ethyl Ketone 78-93-3 mg/L 26 NCDEQ -- -- 1 0 1 0.0049 0.0049 -- 0.0049 0.0049 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/L 26 NCDEQ -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/L 11 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/L 0.0039 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.5 0.5 No COPEC: QL<ESV
N-Propylbenzene 103-65-1 mg/L 0.08 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene) 95-47-6 mg/L 0.6 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
p-Cymene (p-Isopropyltoluene) 99-87-6 mg/L 0.32 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/L 0.032 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Alcohol 75-65-0 mg/L -- -- -- -- 1 0 1 0.0577 0.0577 -- 0.0577 0.0577 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/L 34 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/L 0.053 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/L 0.011 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/L 0.558 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/L 0.0017 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
4 of 5
Table C-7
Summary Surface Water Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
UnitsChemical Name CAS RN
Trichloroethylene 79-01-6 mg/L 0.22 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Trichlorofluoromethane 75-69-4 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/L 0.016 USEPA R4 -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.1 0.1 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/L 0.93 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
5 of 5
Table C-8
Summary Sediment Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 0.42 0.42 1 1 0 0.24 0.24 ABL-SD004 0.42 0.42 0 0 -- -- Category 3: No ESV & Detect
Fluoride 16984-48-8 mg/kg -- -- -- -- 1 0 1 20.1 20.1 -- 20.1 20.1 0 0 -- -- Category 4: No ESV & ND
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 10.4 10.4 1 1 0 0.49 0.49 ABL-SD004 10.4 10.4 0 0 0.3 0.3 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 54.9 54.9 1 1 0 0.24 0.24 ABL-SD004 54.9 54.9 0 0 0.9 0.9 No COPEC: EPC<ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.18 0.18 1 1 0 0.049 0.049 ABL-SD004 0.18 0.18 0 0 0.0 0.0 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 54.7 54.7 1 1 0 0.24 0.24 ABL-SD004 54.7 54.7 0 0 0.5 0.5 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 24.4 24.4 1 1 0 0.24 0.24 ABL-SD004 24.4 24.4 0 0 0.2 0.2 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.019 0.019 1 1 0 0.00014 0.00014 ABL-SD004 0.019 0.019 0 0 0.0 0.0 No COPEC: EPC<ESV
Selenium 7782-49-2 mg/kg 2.9 EPA R4 RSV -- -- 1 0 1 0.49 0.49 -- 0.49 0.49 0 0 0.2 0.2 No COPEC: QL<ESV
Silver 7440-22-4 mg/kg 2.2 EPA R4 RSV 0.6 0.6 1 1 0 0.24 0.24 ABL-SD004 0.6 0.6 0 0 0.3 0.3 No COPEC: EPC<ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/kg -- -- -- -- 1 0 1 0.0236 0.0236 -- 0.0236 0.0236 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/kg -- -- -- -- 1 0 1 0.0236 0.0236 -- 0.0236 0.0236 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/kg -- -- -- -- 1 0 1 0.0236 0.0236 -- 0.0236 0.0236 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/kg -- -- -- -- 1 0 1 0.0236 0.0236 -- 0.0236 0.0236 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/kg -- -- -- -- 1 0 1 0.0236 0.0236 -- 0.0236 0.0236 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/kg -- -- -- -- 1 0 1 0.0236 0.0236 -- 0.0236 0.0236 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/kg -- -- -- -- 1 0 1 0.0236 0.0236 -- 0.0236 0.0236 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/kg 0.676 EPA R4 RSV -- -- 1 0 1 0.1652 0.1652 -- 0.1652 0 0 0 0.2 0.0 No COPEC: QL<ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/kg 0.676 EPA R4 RSV -- -- 1 0 1 0.1652 0.1652 -- 0.1652 0.1652 0 0 0.2 0.2 No COPEC: QL<ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/kg 0.676 EPA R4 RSV -- -- 1 0 1 0.1652 0.1652 -- 0.1652 0.0826 0 0 0.2 0.1 No COPEC: QL<ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg 9.82 EPA R4 RSV -- -- 1 0 1 0.12 0.12 -- 0.12 0.12 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/kg 9.04 EPA R4 RSV -- -- 1 0 1 0.123 0.123 -- 0.123 0.123 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/kg 11.88 EPA R4 RSV -- -- 1 0 1 0.117 0.117 -- 0.117 0.117 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/kg 16.82 EPA R4 RSV -- -- 1 0 1 0.0961 0.0961 -- 0.0961 0.0961 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[a]pyrene 50-32-8 mg/kg 19.3 EPA R4 RSV -- -- 1 0 1 0.0992 0.0992 -- 0.0992 0.0992 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[b]fluoranthene 205-99-2 mg/kg 19.58 EPA R4 RSV -- -- 1 0 1 0.0898 0.0898 -- 0.0898 0.0898 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[g,h,i]perylene 191-24-2 mg/kg 21.8 EPA R4 RSV -- -- 1 0 1 0.132 0.132 -- 0.132 0.132 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[k]fluoranthene 207-08-9 mg/kg 19.62 EPA R4 RSV -- -- 1 0 1 0.102 0.102 -- 0.102 0.102 0 0 0.0 0.0 No COPEC: QL<ESV
Chrysene 218-01-9 mg/kg 16.88 EPA R4 RSV -- -- 1 0 1 0.0693 0.0693 -- 0.0693 0.0693 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/kg 22.4 EPA R4 RSV -- -- 1 0 1 0.11 0.11 -- 0.11 0.11 0 0 0.0 0.0 No COPEC: QL<ESV
Fluoranthene 206-44-0 mg/kg 14.14 EPA R4 RSV -- -- 1 0 1 0.0756 0.0756 -- 0.0756 0.0756 0 0 0.0 0.0 No COPEC: QL<ESV
Fluorene 86-73-7 mg/kg 10.76 EPA R4 RSV -- -- 1 0 1 0.107 0.107 -- 0.107 0.107 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg 22.4 EPA R4 RSV -- -- 1 0 1 0.107 0.107 -- 0.107 0.107 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV -- -- 1 0 1 0.128 0.128 -- 0.128 0.128 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/kg 11.92 EPA R4 RSV -- -- 1 0 1 0.0866 0.0866 -- 0.0866 0.0866 0 0 0.0 0.0 No COPEC: QL<ESV
Pyrene 129-00-0 mg/kg 13.94 EPA R4 RSV -- -- 1 0 1 0.0882 0.0882 -- 0.0882 0.0882 0 0 0.0 0.0 No COPEC: QL<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/kg -- -- -- -- 1 0 1 0.8936 0.8936 -- 0.8936 0 0 0 -- -- Category 4: No ESV & ND
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
1 of 5
Table C-8
Summary Sediment Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg -- -- -- -- 1 0 1 0.8936 0.8936 -- 0.8936 0.4468 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg -- -- -- -- 1 0 1 0.8936 0.8936 -- 0.8936 0.8936 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg -- -- -- -- 1 0 1 0.7572 0.7572 -- 0.7572 0 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg -- -- -- -- 1 0 1 0.7572 0.7572 -- 0.7572 0.3786 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg -- -- -- -- 1 0 1 0.7572 0.7572 -- 0.7572 0.7572 0 0 -- -- Category 4: No ESV & ND
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg 8.92 EPA R4 RSV -- -- 1 0 1 0.135 0.135 -- 0.135 0.135 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 1 0 1 0.139 0.139 -- 0.139 0.139 0 0 0.1 0.1 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 1 0 1 0.101 0.101 -- 0.101 0.101 0 0 0.1 0.1 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.118 0.118 -- 0.118 0.118 0 0 0.1 0.1 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.146 0.146 -- 0.146 0.146 0 0 0.2 0.2 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/kg -- -- -- -- 1 0 1 0.102 0.102 -- 0.102 0.102 0 0 -- -- Category 4: No ESV & ND
2-Chlorophenol 95-57-8 mg/kg 0.55 EPA R4 RSV -- -- 1 0 1 0.142 0.142 -- 0.142 0.142 0 0 0.3 0.3 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/kg 8.94 EPA R4 RSV -- -- 1 0 1 0.112 0.112 -- 0.112 0.112 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/kg 3.546 EPA R4 RSV -- -- 1 0 1 0.158 0.158 -- 0.158 0.158 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/kg -- -- -- -- 1 0 1 0.161 0.161 -- 0.161 0.161 0 0 -- -- Category 4: No ESV & ND
2-Nitrophenol 88-75-5 mg/kg 7.178 EPA R4 RSV -- -- 1 0 1 0.126 0.126 -- 0.126 0.126 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/kg 3.772 EPA R4 RSV -- -- 1 0 1 0.113 0.113 -- 0.113 0.113 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/kg 2.874 EPA R4 RSV -- -- 1 0 1 0.205 0.205 -- 0.205 0.205 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/kg 5.922 EPA R4 RSV -- -- 1 0 1 0.0851 0.0851 -- 0.0851 0.0851 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/kg 2.9 EPA R4 RSV -- -- 1 0 1 0.0977 0.0977 -- 0.0977 0.0977 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/kg 3.928 EPA R4 RSV -- -- 1 0 1 0.161 0.161 -- 0.161 0.161 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,6-Trichlorophenol 88-06-2 mg/kg 3.928 EPA R4 RSV -- -- 1 0 1 0.115 0.115 -- 0.115 0.115 0 0 0.0 0.0 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/kg 0.262 EPA R4 RSV -- -- 1 0 1 0.109 0.109 -- 0.109 0.109 0 0 0.4 0.4 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/kg -- -- -- -- 1 0 1 0.205 0.205 -- 0.205 0.205 0 0 -- -- Category 4: No ESV & ND
3-Nitroaniline 99-09-2 mg/kg -- -- -- -- 1 0 1 0.142 0.142 -- 0.142 0.142 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/kg 0.18 EPA R4 RSV -- -- 1 0 1 0.113 0.113 -- 0.113 0.113 0 0 0.6 0.6 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/kg 0.124 EPA R4 RSV -- -- 1 0 1 0.0945 0.0945 -- 0.0945 0.0945 0 0 0.8 0.8 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/kg 4.07 EPA R4 RSV -- -- 1 0 1 0.107 0.107 -- 0.107 0.107 0 0 0.0 0.0 No COPEC: QL<ESV
4-Chloroaniline 106-47-8 mg/kg 0.042 EPA R4 RSV -- -- 1 0 1 0.145 0.145 -- 0.145 0.145 0 1 3.5 3.5 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/kg -- -- -- -- 1 0 1 0.107 0.107 -- 0.107 0.107 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/kg -- -- -- -- 1 0 1 0.146 0.146 -- 0.146 0.146 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/kg 8.21 EPA R4 RSV -- -- 1 0 1 0.0929 0.0929 -- 0.0929 0.0929 0 0 0.0 0.0 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/kg 4.608 EPA R4 RSV -- -- 1 0 1 0.104 0.104 -- 0.104 0.104 0 0 0.0 0.0 No COPEC: QL<ESV
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/kg 0.024 EPA R4 RSV -- -- 1 0 1 0.14 0.14 -- 0.14 0.14 0 1 5.8 5.8 Category 2: QL>ESV
Benzoic acid 65-85-0 mg/kg 4 EPA R4 RSV -- -- 1 0 1 0.0945 0.0945 -- 0.0945 0.0945 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Alcohol 100-51-6 mg/kg 13.458 EPA R4 RSV -- -- 1 0 1 0.104 0.104 -- 0.104 0.104 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/kg 0.962 EPA R4 RSV -- -- 1 0 1 0.11 0.11 -- 0.11 0.11 0 0 0.1 0.1 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/kg -- -- -- -- 1 0 1 0.121 0.121 -- 0.121 0.121 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/kg 16.326 EPA R4 RSV -- -- 1 0 1 0.132 0.132 -- 0.132 0.132 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/kg -- -- -- -- 1 0 1 0.139 0.139 -- 0.139 0.139 0 0 -- -- Category 4: No ESV & ND
2 of 5
Table C-8
Summary Sediment Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/kg 5.2 EPA R4 RSV -- -- 1 0 1 0.142 0.142 -- 0.142 0.142 0 0 0.0 0.0 No COPEC: QL<ESV
Di-N-Butyl Phthalate 84-74-2 mg/kg 0.638 EPA R4 RSV -- -- 1 0 1 0.0851 0.0851 -- 0.0851 0.0851 0 0 0.1 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/kg 2.2 EPA R4 RSV -- -- 1 0 1 0.109 0.109 -- 0.109 0.109 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/kg 4.626 EPA R4 RSV -- -- 1 0 1 0.0851 0.0851 -- 0.0851 0.0851 0 0 0.0 0.0 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/kg 2.21 EPA R4 RSV -- -- 1 0 1 0.0803 0.0803 -- 0.0803 0.0803 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/kg 4.062 EPA R4 RSV -- -- 1 0 1 0.106 0.106 -- 0.106 0.106 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/kg 0.48 EPA R4 RSV -- -- 1 0 1 0.0662 0.0662 -- 0.0662 0.0662 0 0 0.1 0.1 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 1 0 1 0.0898 0.0898 -- 0.0898 0.0898 0 0 -- -- Category 4: No ESV & ND
Hexachlorocyclopentadiene 77-47-4 mg/kg 0.81 EPA R4 RSV -- -- 1 0 1 0.0961 0.0961 -- 0.0961 0.0961 0 0 0.1 0.1 No COPEC: QL<ESV
Hexachloroethane 67-72-1 mg/kg 0.15 EPA R4 RSV -- -- 1 0 1 0.137 0.137 -- 0.137 0.137 0 0 0.9 0.9 No COPEC: QL<ESV
Isophorone 78-59-1 mg/kg 1.896 EPA R4 RSV -- -- 1 0 1 0.117 0.117 -- 0.117 0.117 0 0 0.1 0.1 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/kg -- -- -- -- 1 0 1 0.0992 0.0992 -- 0.0992 0.0992 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/kg -- -- -- -- 1 0 1 0.169 0.169 -- 0.169 0.169 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodiphenylamine 86-30-6 mg/kg 0.74 EPA R4 RSV -- -- 1 0 1 0.154 0.154 -- 0.154 0.154 0 0 0.2 0.2 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/kg 18.014 EPA R4 RSV -- -- 1 0 1 0.142 0.142 -- 0.142 0.142 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/kg 1.2 EPA R4 RSV -- -- 1 0 1 0.0945 0.0945 -- 0.0945 0.0945 0 0 0.1 0.1 No COPEC: QL<ESV
Phenol 108-95-2 mg/kg 0.21 EPA R4 RSV -- -- 1 0 1 0.156 0.156 -- 0.156 0.156 0 0 0.7 0.7 No COPEC: QL<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/kg 3.332 EPA R4 RSV -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/kg 1.506 EPA R4 RSV -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/kg -- -- -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/kg 0.734 EPA R4 RSV -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/kg 0.836 EPA R4 RSV -- -- 1 0 1 0.0027 0.0027 -- 0.0027 0.0027 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/kg 3.09 EPA R4 RSV -- -- 1 0 1 0.0027 0.0027 -- 0.0027 0.0027 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/kg 4.46 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/kg -- -- -- -- 1 0 1 0.0046 0.0046 -- 0.0046 0.0046 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 mg/kg -- -- -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/kg 2.262 EPA R4 RSV -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/kg 1.752 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/kg 0.99 EPA R4 RSV -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/kg -- -- -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/kg 0.722 EPA R4 RSV -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/kg -- -- -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 mg/kg 0.708 EPA R4 RSV -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorotoluene 95-49-8 mg/kg -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/kg 15.196 EPA R4 RSV -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/kg -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
3 of 5
Table C-8
Summary Sediment Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
4-Chlorotoluene 106-43-4 mg/kg -- -- -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/kg 76.266 EPA R4 RSV -- -- 1 0 1 0.0127 0.0127 -- 0.0127 0.0127 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/kg 4.37 EPA R4 RSV -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/kg -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/kg -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/kg 0.42 EPA R4 ESV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/kg 0.284 EPA R4 ESV -- -- 1 0 1 0.0029 0.0029 -- 0.0029 0.0029 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/kg 0.013 EPA R4 ESV -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 0.2 0.2 No COPEC: QL<ESV
Carbon Tetrachloride 56-23-5 mg/kg 1.412 EPA R4 RSV -- -- 1 0 1 0.0033 0.0033 -- 0.0033 0.0033 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/kg 1.878 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/kg -- -- -- -- 1 0 1 0.0031 0.0031 -- 0.0031 0.0031 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/kg 6.704 EPA R4 RSV -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/kg -- -- -- -- 1 0 1 0.0031 0.0031 -- 0.0031 0.0031 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/kg 2.27 EPA R4 RSV -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/kg -- -- -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 -- -- Category 4: No ESV & ND
Dibromochloromethane 124-48-1 mg/kg 0.396 EPA R4 ESV -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/kg -- -- -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/kg -- -- -- -- 1 0 1 0.0046 0.0046 -- 0.0046 0.0046 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/kg 2.934 EPA R4 RSV -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
Isopropyl Ether 108-20-3 mg/kg -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Isopropylbenzene (Cumene) 98-82-8 mg/kg 1.426 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/kg -- -- -- -- 1 0 1 0.0046 0.0046 -- 0.0046 0.0046 0 0 -- -- Category 4: No ESV & ND
Methyl Ethyl Ketone 78-93-3 mg/kg 45.414 EPA R4 RSV -- -- 1 0 1 0.0037 0.0037 -- 0.0037 0.0037 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/kg 16.33 EPA R4 RSV -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/kg 4.808 EPA R4 RSV -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/kg -- -- -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 -- -- Category 4: No ESV & ND
N-Propylbenzene 103-65-1 mg/kg -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene) 95-47-6 mg/kg -- -- -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
p-Cymene (p-Isopropyltoluene) 99-87-6 mg/kg 0.484 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/kg -- -- -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/kg 3.242 EPA R4 RSV -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/kg -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/kg 8.866 EPA R4 RSV -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/kg 0.83 EPA R4 RSV -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/kg 4.148 EPA R4 RSV -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/kg 2.27 EPA R4 RSV -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/kg -- -- -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 -- -- Category 4: No ESV & ND
Trichloroethylene 79-01-6 mg/kg 1.384 EPA R4 RSV -- -- 1 0 1 0.0027 0.0027 -- 0.0027 0.0027 0 0 0.0 0.0 No COPEC: QL<ESV
Trichlorofluoromethane 75-69-4 mg/kg -- -- -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 -- -- Category 4: No ESV & ND
4 of 5
Table C-8
Summary Sediment Screening - WB Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits
Location of
Max
Values for Screening
Vinyl Acetate 108-05-4 mg/kg 4.46 EPA R4 RSV -- -- 1 0 1 0.0112 0.0112 -- 0.0112 0.0112 0 0 0.0 0.0 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/kg 2.356 EPA R4 RSV -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
Xylenes 1330-20-7 mg/kg 2.148 EPA R4 RSV -- -- 1 0 1 0.0046 0.0046 -- 0.0046 0.0046 0 0 0.0 0.0 No COPEC: QL<ESV
General Chemistry
Moisture, Percent MOIST % -- -- 36.5 36.5 1 1 0 0.1 0.1 ABL-SD004 36.5 36.5 0 0 -- -- Category 3: No ESV & Detect
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
RSV - Refined screening value
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
5 of 5
Table C-9
Summary Surface Water Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 28.9 28.9 1 1 0 5 5 ABL-ML002 28.9 28.9 1 1 16.1 16.1 Category 1/5: Max EPC>ESV
Metals
Arsenic 7440-38-2 mg/L 0.15 NCDEQ -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0481 0.0481 1 1 0 0.0025 0.0025 ABL-ML002 0.0481 0.0481 0 0 0.2 0.2 No COPEC: EPC<ESV
Cadmium 7440-43-9 mg/L 0.000702 See Notes -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 0.7 0.7 No COPEC: QL<ESV
Chromium, total 7440-47-3 mg/L 0.07229 See Notes -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.0 0.0 No COPEC: QL<ESV
Lead 7439-92-1 mg/L 0.00243 See Notes -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 1 1.0 1.0 Category 2: QL>ESV
Mercury 7439-97-6 mg/L 0.000012 NCDEQ -- -- 1 0 1 0.0001 0.0001 -- 0.0001 0.0001 0 1 8.3 8.3 Category 2: QL>ESV
Selenium 7782-49-2 mg/L 0.0151 NCDEQ -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.3 0.3 No COPEC: QL<ESV
Silver 7440-22-4 mg/L 0.00006 NCDEQ -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 1 41.7 41.7 Category 2: QL>ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.0035 0.0035 -- 0.0035 0 0 0 3500.0 0.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.0035 0.0035 -- 0.0035 0.00175 1 1 3500.0 1750.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/L 0.000001 NCDEQ -- -- 1 0 1 0.0035 0.0035 -- 0.0035 0.0035 1 1 3500.0 3500.0 Category 2: QL>ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/L 0.056 See Notes -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/L 0.307 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/L 0.021 See Notes -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.1 0.1 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/L 0.0022 See Notes -- -- 1 0 1 0.00072 0.00072 -- 0.00072 0.00072 0 0 0.3 0.3 No COPEC: QL<ESV
Benzo[a]pyrene 50-32-8 mg/L 0.00096 See Notes -- -- 1 0 1 0.00071 0.00071 -- 0.00071 0.00071 0 0 0.7 0.7 No COPEC: QL<ESV
Benzo[b]fluoranthene 205-99-2 mg/L 0.00068 See Notes -- -- 1 0 1 0.00081 0.00081 -- 0.00081 0.00081 0 1 1.2 1.2 Category 2: QL>ESV
Benzo[g,h,i]perylene 191-24-2 mg/L 0.00044 See Notes -- -- 1 0 1 0.00097 0.00097 -- 0.00097 0.00097 0 1 2.2 2.2 Category 2: QL>ESV
Benzo[k]fluoranthene 207-08-9 mg/L 0.00064 See Notes -- -- 1 0 1 0.00087 0.00087 -- 0.00087 0.00087 0 1 1.4 1.4 Category 2: QL>ESV
Chrysene 218-01-9 mg/L 0.002 See Notes -- -- 1 0 1 0.00065 0.00065 -- 0.00065 0.00065 0 0 0.3 0.3 No COPEC: QL<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/L 0.00028 See Notes -- -- 1 0 1 0.0007 0.0007 -- 0.0007 0.0007 0 1 2.5 2.5 Category 2: QL>ESV
Fluoranthene 206-44-0 mg/L 0.0071 See Notes -- -- 1 0 1 0.00087 0.00087 -- 0.00087 0.00087 0 0 0.1 0.1 No COPEC: QL<ESV
Fluorene 86-73-7 mg/L 0.039 See Notes -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/L 0.00028 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 6.4 6.4 Category 2: QL>ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/L 0.019 See Notes -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.1 0.1 No COPEC: QL<ESV
Pyrene 129-00-0 mg/L 0.01 See Notes -- -- 1 0 1 0.00053 0.00053 -- 0.00053 0.00053 0 0 0.1 0.1 No COPEC: QL<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/L -- -- -- -- 1 0 1 0.00776 0.00776 -- 0.00776 0 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/L -- -- -- -- 1 0 1 0.00776 0.00776 -- 0.00776 0.00388 0 0 -- -- Category 4: No ESV & ND
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
1 of 5
Table C-9
Summary Surface Water Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
Total HMW PAHs PAHs_highMW_ND=LOD mg/L -- -- -- -- 1 0 1 0.00776 0.00776 -- 0.00776 0.00776 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=0 mg/L -- -- -- -- 1 0 1 0.00957 0.00957 -- 0.00957 0 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/L -- -- -- -- 1 0 1 0.00957 0.00957 -- 0.00957 0.004785 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=LOD mg/L -- -- -- -- 1 0 1 0.00957 0.00957 -- 0.00957 0.00957 0 0 -- -- Category 4: No ESV & ND
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/L 0.075 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.1 0.1 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/L 0.11 NCDEQ -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorophenol 95-57-8 mg/L 0.018 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.1 0.1 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/L 0.072 See Notes -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/L 0.067 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/L 0.017 USEPA R4 -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 0.2 0.2 No COPEC: QL<ESV
2-Nitrophenol 88-75-5 mg/L 0.073 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/L 0.011 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.2 0.2 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/L 0.015 USEPA R4 -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/L 0.071 USEPA R4 -- -- 1 0 1 0.0065 0.0065 -- 0.0065 0.0065 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/L 0.044 USEPA R4 -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/L 0.0019 USEPA R4 -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 1 1.2 1.2 Category 2: QL>ESV
2,4,6-Trichlorophenol 88-06-2 mg/L 0.0049 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.4 0.4 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/L 0.081 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/L 0.053 See Notes -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
3-Nitroaniline 99-09-2 mg/L -- -- -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/L 0.0045 USEPA R4 -- -- 1 0 1 0.0014 0.0014 -- 0.0014 0.0014 0 0 0.3 0.3 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/L 0.002 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.7 0.7 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 1 4.2 4.2 Category 2: QL>ESV
4-Chloroaniline 106-47-8 mg/L 0.0008 USEPA R4 -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 1 4.3 4.3 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/L -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/L -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/L 0.058 USEPA R4 -- -- 1 0 1 0.0058 0.0058 -- 0.0058 0.0058 0 0 0.1 0.1 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/L 0.0041 USEPA R4 -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.3 0.3 No COPEC: QL<ESV
Benzoic acid 65-85-0 mg/L 9 NCDEQ -- -- 1 0 1 0.0111 0.0111 -- 0.0111 0.0111 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Alcohol 100-51-6 mg/L 0.5 NCDEQ -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/L 0.019 NCDEQ -- -- 1 0 1 0.00075 0.00075 -- 0.00075 0.00075 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/L 9.2 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/L 0.005 NCDEQ 0.0141 0.0141 1 1 0 0.00085 0.00085 ABL-ML002 0.0141 0.0141 1 1 2.8 2.8 Category 1/5: Max EPC>ESV
2 of 5
Table C-9
Summary Surface Water Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
Di-N-Butyl Phthalate 84-74-2 mg/L 0.0095 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.1 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/L 0.215 USEPA R4 -- -- 1 0 1 0.00086 0.00086 -- 0.00086 0.00086 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/L 0.004 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.5 0.5 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/L 1.2 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/L 3.4 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/L 0.00015 USEPA R4 -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 1 7.3 7.3 Category 2: QL>ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 1.8 1.8 Category 2: QL>ESV
Hexachlorocyclopentadiene 77-47-4 mg/L 0.00007 NCDEQ -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 25.7 25.7 Category 2: QL>ESV
Hexachloroethane 67-72-1 mg/L 0.012 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.1 0.1 No COPEC: QL<ESV
Isophorone 78-59-1 mg/L 0.92 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/L -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/L 17 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodiphenylamine 86-30-6 mg/L 0.29 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/L 4.6 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/L 0.015 USEPA R4 -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.2 0.2 No COPEC: QL<ESV
Phenol 108-95-2 mg/L 0.16 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/L 0.41 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/L 0.13 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/L 2.5 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/L 0.085 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/L 2.3 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/L 0.2 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/L 2 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-dichloroethene (cis+trans) 540-59-0 mg/L 0.97 USEPA R4 -- -- 1 0 1 0.0044 0.0044 -- 0.0044 0.0044 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/L 0.52 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/L 0.008 USEPA R4 -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.3 0.3 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 mg/L 0.63 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.2 0.2 No COPEC: QL<ESV
2-Chlorotoluene 95-49-8 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/L 0.099 USEPA R4 -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
3 of 5
Table C-9
Summary Surface Water Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
4-Chlorotoluene 106-43-4 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/L 2 NCDEQ -- -- 1 0 1 0.01 0.01 -- 0.01 0.01 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/L 0.16 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/L -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/L 0.34 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/L 0.23 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/L 0.00004 NCDEQ -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 1 62.5 62.5 Category 2: QL>ESV
Carbon Tetrachloride 56-23-5 mg/L 0.077 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/L 0.14 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/L 0.14 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/L 0.62 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/L 0.0017 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Dibromochloromethane 124-48-1 mg/L 0.32 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/L -- -- -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/L 0.097 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 1.8 1.8 Category 2: QL>ESV
Isopropyl Ether 108-20-3 mg/L 20 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Isopropylbenzene (Cumene) 98-82-8 mg/L 0.25 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/L 0.42 See Notes -- -- 1 0 1 0.0031 0.0031 -- 0.0031 0.0031 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Ethyl Ketone 78-93-3 mg/L 26 NCDEQ -- -- 1 0 1 0.0049 0.0049 -- 0.0049 0.0049 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/L 26 NCDEQ -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/L 11 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/L 0.0039 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.5 0.5 No COPEC: QL<ESV
N-Propylbenzene 103-65-1 mg/L 0.08 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene) 95-47-6 mg/L 0.6 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
p-Cymene (p-Isopropyltoluene) 99-87-6 mg/L 0.32 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/L 0.032 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Alcohol 75-65-0 mg/L -- -- -- -- 1 0 1 0.0577 0.0577 -- 0.0577 0.0577 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/L 34 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/L 0.053 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/L 0.011 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/L 0.558 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/L 0.0017 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Trichloroethylene 79-01-6 mg/L 0.22 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
4 of 5
Table C-9
Summary Surface Water Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
Trichlorofluoromethane 75-69-4 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/L 0.016 USEPA R4 -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.1 0.1 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/L 0.93 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
5 of 5
Table C-10
Summary Sediment Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/kg -- -- 0.43 0.43 1 1 0 0.25 0.25 ABL-SD005 0.43 0.43 0 0 -- -- Category 3: No ESV & Detect
Fluoride 16984-48-8 mg/kg -- -- 144 144 1 1 0 21.5 21.5 ABL-SD005 144 144 0 0 -- -- Category 3: No ESV & Detect
Metals
Arsenic 7440-38-2 mg/kg 33 EPA R4 RSV 15.8 15.8 1 1 0 4.6 4.6 ABL-SD005 15.8 15.8 0 0 0.5 0.5 No COPEC: EPC<ESV
Barium 7440-39-3 mg/kg 60 EPA R4 RSV 187 187 1 1 0 0.23 0.23 ABL-SD005 187 187 1 1 3.1 3.1 Category 1: Max EPC>ESV
Cadmium 7440-43-9 mg/kg 5 EPA R4 RSV 0.55 0.55 1 1 0 0.46 0.46 ABL-SD005 0.55 0.55 0 0 0.1 0.1 No COPEC: EPC<ESV
Chromium, total 7440-47-3 mg/kg 111 EPA R4 RSV 29.3 29.3 1 1 0 2.3 2.3 ABL-SD005 29.3 29.3 0 0 0.3 0.3 No COPEC: EPC<ESV
Lead 7439-92-1 mg/kg 128 EPA R4 RSV 23.9 23.9 1 1 0 2.3 2.3 ABL-SD005 23.9 23.9 0 0 0.2 0.2 No COPEC: EPC<ESV
Mercury 7439-97-6 mg/kg 1.1 EPA R4 RSV 0.016 0.016 1 1 0 0.00016 0.00016 ABL-SD005 0.016 0.016 0 0 0.0 0.0 No COPEC: EPC<ESV
Selenium 7782-49-2 mg/kg 2.9 EPA R4 RSV -- -- 1 0 1 4.6 4.6 -- 4.6 4.6 0 1 1.6 1.6 Category 2: QL>ESV
Silver 7440-22-4 mg/kg 2.2 EPA R4 RSV -- -- 1 0 1 2.3 2.3 -- 2.3 2.3 0 1 1.0 1.0 Category 2: QL>ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/kg -- -- -- -- 1 0 1 0.0261 0.0261 -- 0.0261 0.0261 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/kg -- -- -- -- 1 0 1 0.0261 0.0261 -- 0.0261 0.0261 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/kg -- -- -- -- 1 0 1 0.0261 0.0261 -- 0.0261 0.0261 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/kg -- -- -- -- 1 0 1 0.0261 0.0261 -- 0.0261 0.0261 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/kg -- -- -- -- 1 0 1 0.0261 0.0261 -- 0.0261 0.0261 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/kg -- -- -- -- 1 0 1 0.0261 0.0261 -- 0.0261 0.0261 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/kg -- -- -- -- 1 0 1 0.0261 0.0261 -- 0.0261 0.0261 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/kg 0.676 EPA R4 RSV -- -- 1 0 1 0.1827 0.1827 -- 0.1827 0 0 0 0.3 0.0 No COPEC: QL<ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/kg 0.676 EPA R4 RSV -- -- 1 0 1 0.1827 0.1827 -- 0.1827 0.09135 0 0 0.3 0.1 No COPEC: QL<ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/kg 0.676 EPA R4 RSV -- -- 1 0 1 0.1827 0.1827 -- 0.1827 0.1827 0 0 0.3 0.3 No COPEC: QL<ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg 9.82 EPA R4 RSV -- -- 1 0 1 0.132 0.132 -- 0.132 0.132 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/kg 9.04 EPA R4 RSV -- -- 1 0 1 0.136 0.136 -- 0.136 0.136 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/kg 11.88 EPA R4 RSV -- -- 1 0 1 0.129 0.129 -- 0.129 0.129 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/kg 16.82 EPA R4 RSV 0.139 0.139 1 1 0 0.106 0.106 ABL-SD005 0.139 0.139 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[a]pyrene 50-32-8 mg/kg 19.3 EPA R4 RSV 0.191 0.191 1 1 0 0.11 0.11 ABL-SD005 0.191 0.191 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[b]fluoranthene 205-99-2 mg/kg 19.58 EPA R4 RSV 0.246 0.246 1 1 0 0.0992 0.0992 ABL-SD005 0.246 0.246 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzo[g,h,i]perylene 191-24-2 mg/kg 21.8 EPA R4 RSV -- -- 1 0 1 0.146 0.146 -- 0.146 0.146 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[k]fluoranthene 207-08-9 mg/kg 19.62 EPA R4 RSV -- -- 1 0 1 0.113 0.113 -- 0.113 0.113 0 0 0.0 0.0 No COPEC: QL<ESV
Chrysene 218-01-9 mg/kg 16.88 EPA R4 RSV 0.161 0.161 1 1 0 0.0766 0.0766 ABL-SD005 0.161 0.161 0 0 0.0 0.0 No COPEC: EPC<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/kg 22.4 EPA R4 RSV -- -- 1 0 1 0.122 0.122 -- 0.122 0.122 0 0 0.0 0.0 No COPEC: QL<ESV
Fluoranthene 206-44-0 mg/kg 14.14 EPA R4 RSV 0.201 0.201 1 1 0 0.0835 0.0835 ABL-SD005 0.201 0.201 0 0 0.0 0.0 No COPEC: EPC<ESV
Fluorene 86-73-7 mg/kg 10.76 EPA R4 RSV -- -- 1 0 1 0.118 0.118 -- 0.118 0.118 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg 22.4 EPA R4 RSV -- -- 1 0 1 0.118 0.118 -- 0.118 0.118 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV -- -- 1 0 1 0.141 0.141 -- 0.141 0.141 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/kg 11.92 EPA R4 RSV 0.0978 0.0978 1 1 0 0.0957 0.0957 ABL-SD005 0.0978 0.0978 0 0 0.0 0.0 No COPEC: EPC<ESV
Pyrene 129-00-0 mg/kg 13.94 EPA R4 RSV 0.199 0.199 1 1 0 0.0975 0.0975 ABL-SD005 0.199 0.199 0 0 0.0 0.0 No COPEC: EPC<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/kg -- -- 0.936 0.936 1 1 0 0.9883 0.9883 ABL-SD005 0.9883 0.936 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg -- -- 1.1855 1.1855 1 1 0 0.9883 0.9883 ABL-SD005 1.1855 1.1855 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of Exceedances Hazard
Quotients COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
1 of 5
Table C-10
Summary Sediment Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of Exceedances Hazard
Quotients COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg -- -- 1.435 1.435 1 1 0 0.9883 0.9883 ABL-SD005 1.435 1.435 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg -- -- 0.2988 0.2988 1 1 0 0.8352 0.8352 ABL-SD005 0.8352 0.2988 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg -- -- 0.6268 0.6268 1 1 0 0.8352 0.8352 ABL-SD005 0.8352 0.6268 0 0 -- -- Category 3: No ESV & Detect
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg -- -- 0.9548 0.9548 1 1 0 0.8352 0.8352 ABL-SD005 0.9548 0.9548 0 0 -- -- Category 3: No ESV & Detect
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg 8.92 EPA R4 RSV -- -- 1 0 1 0.15 0.15 -- 0.15 0.15 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 1 0 1 0.153 0.153 -- 0.153 0.153 0 0 0.2 0.2 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 1 0 1 0.111 0.111 -- 0.111 0.111 0 0 0.1 0.1 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.131 0.131 -- 0.131 0.131 0 0 0.1 0.1 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.162 0.162 -- 0.162 0.162 0 0 0.2 0.2 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/kg -- -- -- -- 1 0 1 0.113 0.113 -- 0.113 0.113 0 0 -- -- Category 4: No ESV & ND
2-Chlorophenol 95-57-8 mg/kg 0.55 EPA R4 RSV -- -- 1 0 1 0.157 0.157 -- 0.157 0.157 0 0 0.3 0.3 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/kg 8.94 EPA R4 RSV -- -- 1 0 1 0.124 0.124 -- 0.124 0.124 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/kg 3.546 EPA R4 RSV -- -- 1 0 1 0.174 0.174 -- 0.174 0.174 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/kg -- -- -- -- 1 0 1 0.178 0.178 -- 0.178 0.178 0 0 -- -- Category 4: No ESV & ND
2-Nitrophenol 88-75-5 mg/kg 7.178 EPA R4 RSV -- -- 1 0 1 0.139 0.139 -- 0.139 0.139 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/kg 3.772 EPA R4 RSV -- -- 1 0 1 0.125 0.125 -- 0.125 0.125 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/kg 2.874 EPA R4 RSV -- -- 1 0 1 0.226 0.226 -- 0.226 0.226 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/kg 5.922 EPA R4 RSV -- -- 1 0 1 0.094 0.094 -- 0.094 0.094 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/kg 2.9 EPA R4 RSV -- -- 1 0 1 0.108 0.108 -- 0.108 0.108 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/kg 3.928 EPA R4 RSV -- -- 1 0 1 0.178 0.178 -- 0.178 0.178 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,6-Trichlorophenol 88-06-2 mg/kg 3.928 EPA R4 RSV -- -- 1 0 1 0.127 0.127 -- 0.127 0.127 0 0 0.0 0.0 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/kg 0.262 EPA R4 RSV -- -- 1 0 1 0.12 0.12 -- 0.12 0.12 0 0 0.5 0.5 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/kg -- -- -- -- 1 0 1 0.226 0.226 -- 0.226 0.226 0 0 -- -- Category 4: No ESV & ND
3-Nitroaniline 99-09-2 mg/kg -- -- -- -- 1 0 1 0.157 0.157 -- 0.157 0.157 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/kg 0.18 EPA R4 RSV -- -- 1 0 1 0.125 0.125 -- 0.125 0.125 0 0 0.7 0.7 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/kg 0.124 EPA R4 RSV -- -- 1 0 1 0.104 0.104 -- 0.104 0.104 0 0 0.8 0.8 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/kg 4.07 EPA R4 RSV -- -- 1 0 1 0.118 0.118 -- 0.118 0.118 0 0 0.0 0.0 No COPEC: QL<ESV
4-Chloroaniline 106-47-8 mg/kg 0.042 EPA R4 RSV -- -- 1 0 1 0.16 0.16 -- 0.16 0.16 0 1 3.8 3.8 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/kg -- -- -- -- 1 0 1 0.118 0.118 -- 0.118 0.118 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/kg -- -- -- -- 1 0 1 0.162 0.162 -- 0.162 0.162 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/kg 8.21 EPA R4 RSV -- -- 1 0 1 0.103 0.103 -- 0.103 0.103 0 0 0.0 0.0 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/kg 4.608 EPA R4 RSV -- -- 1 0 1 0.115 0.115 -- 0.115 0.115 0 0 0.0 0.0 No COPEC: QL<ESV
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/kg 0.024 EPA R4 RSV -- -- 1 0 1 0.155 0.155 -- 0.155 0.155 0 1 6.5 6.5 Category 2: QL>ESV
Benzoic acid 65-85-0 mg/kg 4 EPA R4 RSV 0.187 0.187 1 1 0 0.104 0.104 ABL-SD005 0.187 0.187 0 0 0.0 0.0 No COPEC: EPC<ESV
Benzyl Alcohol 100-51-6 mg/kg 13.458 EPA R4 RSV -- -- 1 0 1 0.115 0.115 -- 0.115 0.115 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/kg 0.962 EPA R4 RSV -- -- 1 0 1 0.122 0.122 -- 0.122 0.122 0 0 0.1 0.1 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/kg -- -- -- -- 1 0 1 0.134 0.134 -- 0.134 0.134 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/kg 16.326 EPA R4 RSV -- -- 1 0 1 0.146 0.146 -- 0.146 0.146 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/kg -- -- -- -- 1 0 1 0.153 0.153 -- 0.153 0.153 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/kg 5.2 EPA R4 RSV -- -- 1 0 1 0.157 0.157 -- 0.157 0.157 0 0 0.0 0.0 No COPEC: QL<ESV
Di-N-Butyl Phthalate 84-74-2 mg/kg 0.638 EPA R4 RSV -- -- 1 0 1 0.094 0.094 -- 0.094 0.094 0 0 0.1 0.1 No COPEC: QL<ESV
2 of 5
Table C-10
Summary Sediment Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of Exceedances Hazard
Quotients COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
Di-N-Octylphthalate 117-84-0 mg/kg 2.2 EPA R4 RSV -- -- 1 0 1 0.12 0.12 -- 0.12 0.12 0 0 0.1 0.1 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/kg 4.626 EPA R4 RSV -- -- 1 0 1 0.094 0.094 -- 0.094 0.094 0 0 0.0 0.0 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/kg 2.21 EPA R4 RSV -- -- 1 0 1 0.0888 0.0888 -- 0.0888 0.0888 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/kg 4.062 EPA R4 RSV -- -- 1 0 1 0.117 0.117 -- 0.117 0.117 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/kg 0.48 EPA R4 RSV -- -- 1 0 1 0.0731 0.0731 -- 0.0731 0.0731 0 0 0.2 0.2 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 1 0 1 0.0992 0.0992 -- 0.0992 0.0992 0 0 -- -- Category 4: No ESV & ND
Hexachlorocyclopentadiene 77-47-4 mg/kg 0.81 EPA R4 RSV -- -- 1 0 1 0.106 0.106 -- 0.106 0.106 0 0 0.1 0.1 No COPEC: QL<ESV
Hexachloroethane 67-72-1 mg/kg 0.15 EPA R4 RSV -- -- 1 0 1 0.151 0.151 -- 0.151 0.151 0 1 1.0 1.0 Category 2: QL>ESV
Isophorone 78-59-1 mg/kg 1.896 EPA R4 RSV -- -- 1 0 1 0.129 0.129 -- 0.129 0.129 0 0 0.1 0.1 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/kg -- -- -- -- 1 0 1 0.11 0.11 -- 0.11 0.11 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/kg -- -- -- -- 1 0 1 0.186 0.186 -- 0.186 0.186 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodiphenylamine 86-30-6 mg/kg 0.74 EPA R4 RSV -- -- 1 0 1 0.171 0.171 -- 0.171 0.171 0 0 0.2 0.2 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/kg 18.014 EPA R4 RSV -- -- 1 0 1 0.157 0.157 -- 0.157 0.157 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/kg 1.2 EPA R4 RSV -- -- 1 0 1 0.104 0.104 -- 0.104 0.104 0 0 0.1 0.1 No COPEC: QL<ESV
Phenol 108-95-2 mg/kg 0.21 EPA R4 RSV -- -- 1 0 1 0.172 0.172 -- 0.172 0.172 0 0 0.8 0.8 No COPEC: QL<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/kg 3.332 EPA R4 RSV -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/kg 1.506 EPA R4 RSV -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/kg -- -- -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/kg 0.734 EPA R4 RSV -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/kg 0.836 EPA R4 RSV -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/kg 3.09 EPA R4 RSV -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/kg 4.46 EPA R4 RSV -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/kg -- -- -- -- 1 0 1 0.0068 0.0068 -- 0.0068 0.0068 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 mg/kg -- -- -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/kg 0.954 EPA R4 RSV -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/kg 2.262 EPA R4 RSV -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/kg 1.752 EPA R4 RSV -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/kg 0.99 EPA R4 RSV -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/kg -- -- -- -- 1 0 1 0.003 0.003 -- 0.003 0.003 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/kg 0.97 EPA R4 RSV -- -- 1 0 1 0.003 0.003 -- 0.003 0.003 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/kg 0.722 EPA R4 RSV -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/kg -- -- -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 mg/kg 0.708 EPA R4 RSV -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/kg 0.936 EPA R4 RSV -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorotoluene 95-49-8 mg/kg -- -- -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/kg 15.196 EPA R4 RSV -- -- 1 0 1 0.0074 0.0074 -- 0.0074 0.0074 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/kg -- -- -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 -- -- Category 4: No ESV & ND
4-Chlorotoluene 106-43-4 mg/kg -- -- -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/kg 76.266 EPA R4 RSV -- -- 1 0 1 0.019 0.019 -- 0.019 0.019 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/kg 4.37 EPA R4 RSV -- -- 1 0 1 0.003 0.003 -- 0.003 0.003 0 0 0.0 0.0 No COPEC: QL<ESV
3 of 5
Table C-10
Summary Sediment Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of Exceedances Hazard
Quotients COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
Bromobenzene 108-86-1 mg/kg -- -- -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/kg -- -- -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/kg 0.42 EPA R4 ESV -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/kg 0.284 EPA R4 ESV -- -- 1 0 1 0.0044 0.0044 -- 0.0044 0.0044 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/kg 0.013 EPA R4 ESV -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 0.4 0.4 No COPEC: QL<ESV
Carbon Tetrachloride 56-23-5 mg/kg 1.412 EPA R4 RSV -- -- 1 0 1 0.0049 0.0049 -- 0.0049 0.0049 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/kg 1.878 EPA R4 RSV -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/kg -- -- -- -- 1 0 1 0.0046 0.0046 -- 0.0046 0.0046 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/kg 6.704 EPA R4 RSV -- -- 1 0 1 0.003 0.003 -- 0.003 0.003 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/kg -- -- -- -- 1 0 1 0.0046 0.0046 -- 0.0046 0.0046 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/kg 2.27 EPA R4 RSV -- -- 1 0 1 0.0027 0.0027 -- 0.0027 0.0027 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/kg -- -- -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 -- -- Category 4: No ESV & ND
Dibromochloromethane 124-48-1 mg/kg 0.396 EPA R4 ESV -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/kg -- -- -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/kg -- -- -- -- 1 0 1 0.0068 0.0068 -- 0.0068 0.0068 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/kg 2.934 EPA R4 RSV -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/kg -- -- -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 -- -- Category 4: No ESV & ND
Isopropyl Ether 108-20-3 mg/kg -- -- -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 -- -- Category 4: No ESV & ND
Isopropylbenzene (Cumene) 98-82-8 mg/kg 1.426 EPA R4 RSV -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/kg -- -- -- -- 1 0 1 0.0068 0.0068 -- 0.0068 0.0068 0 0 -- -- Category 4: No ESV & ND
Methyl Ethyl Ketone 78-93-3 mg/kg 45.414 EPA R4 RSV -- -- 1 0 1 0.0055 0.0055 -- 0.0055 0.0055 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/kg 16.33 EPA R4 RSV -- -- 1 0 1 0.007 0.007 -- 0.007 0.007 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/kg 4.808 EPA R4 RSV 0.0099 0.0099 1 1 0 0.0057 0.0057 ABL-SD005 0.0099 0.0099 0 0 0.0 0.0 No COPEC: EPC<ESV
N-Butylbenzene 104-51-8 mg/kg -- -- -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 -- -- Category 4: No ESV & ND
N-Propylbenzene 103-65-1 mg/kg -- -- -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 -- -- Category 4: No ESV & ND
Naphthalene 91-20-3 mg/kg 7.7 EPA R4 RSV -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene) 95-47-6 mg/kg -- -- -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 -- -- Category 4: No ESV & ND
p-Cymene (p-Isopropyltoluene) 99-87-6 mg/kg 0.484 EPA R4 RSV -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/kg -- -- -- -- 1 0 1 0.003 0.003 -- 0.003 0.003 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/kg 3.242 EPA R4 RSV -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/kg -- -- -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/kg 8.866 EPA R4 RSV -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/kg 0.83 EPA R4 RSV -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/kg 4.148 EPA R4 RSV -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/kg 2.27 EPA R4 RSV -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/kg -- -- -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 -- -- Category 4: No ESV & ND
Trichloroethylene 79-01-6 mg/kg 1.384 EPA R4 RSV -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 0.0 0.0 No COPEC: QL<ESV
Trichlorofluoromethane 75-69-4 mg/kg -- -- -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/kg 4.46 EPA R4 RSV -- -- 1 0 1 0.0167 0.0167 -- 0.0167 0.0167 0 0 0.0 0.0 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/kg 2.356 EPA R4 RSV -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
Xylenes 1330-20-7 mg/kg 2.148 EPA R4 RSV -- -- 1 0 1 0.0068 0.0068 -- 0.0068 0.0068 0 0 0.0 0.0 No COPEC: QL<ESV
4 of 5
Table C-10
Summary Sediment Screening - WC Wetland/WC Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of Exceedances Hazard
Quotients COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
General Chemistry
Moisture, Percent MOIST % -- -- 42.5 42.5 1 1 0 0.1 0.1 ABL-SD005 42.5 42.5 0 0 -- -- Category 3: No ESV & Detect
Notes
The sediment screening levels presented above were compiled from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 2a, Table 2b, and Table 2c.
Freshwater RSvs were selected as the sediment screening level where available. The freshwater ESV was selected for compounds without freshwater RSVs. PAHs screening levels were selected from Table 2c of the USEPA Region 4 guidance.
Screening levels are normalized for organic carbon where applicable. A sitewide value of 0.05% was utilized for OC normalization
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
ESV - Ecological screening value
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ng/kg - nanogram per kilogram
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
OC - Organic carbon
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
RSV - Refined screening value
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
5 of 5
Table C-11
Summary Surface Water Screening - WY Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 0.31 0.31 1 1 0 0.25 0.25 ABL-ML001 0.31 0.31 0 0 0.2 0.2 No COPEC: EPC<ESV
Metals
Arsenic 7440-38-2 mg/L 0.15 NCDEQ -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.0465 0.0465 1 1 0 0.0025 0.0025 ABL-ML001 0.0465 0.0465 0 0 0.2 0.2 No COPEC: EPC<ESV
Cadmium 7440-43-9 mg/L 0.000702 See Notes -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 0.7 0.7 No COPEC: QL<ESV
Chromium, total 7440-47-3 mg/L 0.07229 See Notes -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.0 0.0 No COPEC: QL<ESV
Lead 7439-92-1 mg/L 0.00243 See Notes -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 1 1.0 1.0 Category 2: QL>ESV
Mercury 7439-97-6 mg/L 0.000012 NCDEQ -- -- 1 0 1 0.0001 0.0001 -- 0.0001 0.0001 0 1 8.3 8.3 Category 2: QL>ESV
Selenium 7782-49-2 mg/L 0.0151 NCDEQ -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.3 0.3 No COPEC: QL<ESV
Silver 7440-22-4 mg/L 0.00006 NCDEQ -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 1 41.7 41.7 Category 2: QL>ESV
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.0035 0.0035 -- 0.0035 0 0 0 3500.0 0.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/L 0.000001 NCDEQ -- -- 1 0 1 0.0035 0.0035 -- 0.0035 0.00175 1 1 3500.0 1750.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/L 0.000001 NCDEQ -- -- 1 0 1 0.0035 0.0035 -- 0.0035 0.0035 1 1 3500.0 3500.0 Category 2: QL>ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/L 0.056 See Notes -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/L 0.307 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/L 0.021 See Notes -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.1 0.1 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/L 0.0022 See Notes -- -- 1 0 1 0.00072 0.00072 -- 0.00072 0.00072 0 0 0.3 0.3 No COPEC: QL<ESV
Benzo[a]pyrene 50-32-8 mg/L 0.00096 See Notes -- -- 1 0 1 0.00071 0.00071 -- 0.00071 0.00071 0 0 0.7 0.7 No COPEC: QL<ESV
Benzo[b]fluoranthene 205-99-2 mg/L 0.00068 See Notes -- -- 1 0 1 0.00081 0.00081 -- 0.00081 0.00081 0 1 1.2 1.2 Category 2: QL>ESV
Benzo[g,h,i]perylene 191-24-2 mg/L 0.00044 See Notes -- -- 1 0 1 0.00097 0.00097 -- 0.00097 0.00097 0 1 2.2 2.2 Category 2: QL>ESV
Benzo[k]fluoranthene 207-08-9 mg/L 0.00064 See Notes -- -- 1 0 1 0.00087 0.00087 -- 0.00087 0.00087 0 1 1.4 1.4 Category 2: QL>ESV
Chrysene 218-01-9 mg/L 0.002 See Notes -- -- 1 0 1 0.00065 0.00065 -- 0.00065 0.00065 0 0 0.3 0.3 No COPEC: QL<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/L 0.00028 See Notes -- -- 1 0 1 0.0007 0.0007 -- 0.0007 0.0007 0 1 2.5 2.5 Category 2: QL>ESV
Fluoranthene 206-44-0 mg/L 0.0071 See Notes -- -- 1 0 1 0.00087 0.00087 -- 0.00087 0.00087 0 0 0.1 0.1 No COPEC: QL<ESV
Fluorene 86-73-7 mg/L 0.039 See Notes -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/L 0.00028 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 6.4 6.4 Category 2: QL>ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/L 0.019 See Notes -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.1 0.1 No COPEC: QL<ESV
Pyrene 129-00-0 mg/L 0.01 See Notes -- -- 1 0 1 0.00053 0.00053 -- 0.00053 0.00053 0 0 0.1 0.1 No COPEC: QL<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/L -- -- -- -- 1 0 1 0.00776 0.00776 -- 0.00776 0 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/L -- -- -- -- 1 0 1 0.00776 0.00776 -- 0.00776 0.00388 0 0 -- -- Category 4: No ESV & ND
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
1 of 5
Table C-11
Summary Surface Water Screening - WY Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
Total HMW PAHs PAHs_highMW_ND=LOD mg/L -- -- -- -- 1 0 1 0.00776 0.00776 -- 0.00776 0.00776 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=0 mg/L -- -- -- -- 1 0 1 0.00957 0.00957 -- 0.00957 0 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/L -- -- -- -- 1 0 1 0.00957 0.00957 -- 0.00957 0.004785 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=LOD mg/L -- -- -- -- 1 0 1 0.00957 0.00957 -- 0.00957 0.00957 0 0 -- -- Category 4: No ESV & ND
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/L 0.075 See Notes -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.1 0.1 No COPEC: QL<ESV
2-Chloronaphthalene 91-58-7 mg/L 0.11 NCDEQ -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorophenol 95-57-8 mg/L 0.018 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.1 0.1 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/L 0.072 See Notes -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/L 0.067 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/L 0.017 USEPA R4 -- -- 1 0 1 0.0028 0.0028 -- 0.0028 0.0028 0 0 0.2 0.2 No COPEC: QL<ESV
2-Nitrophenol 88-75-5 mg/L 0.073 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/L 0.011 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.2 0.2 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/L 0.015 USEPA R4 -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/L 0.071 USEPA R4 -- -- 1 0 1 0.0065 0.0065 -- 0.0065 0.0065 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/L 0.044 USEPA R4 -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/L 0.0019 USEPA R4 -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 1 1.2 1.2 Category 2: QL>ESV
2,4,6-Trichlorophenol 88-06-2 mg/L 0.0049 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.4 0.4 No COPEC: QL<ESV
2,6-Dinitrotoluene 606-20-2 mg/L 0.081 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/L 0.053 See Notes -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
3-Nitroaniline 99-09-2 mg/L -- -- -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/L 0.0045 USEPA R4 -- -- 1 0 1 0.0014 0.0014 -- 0.0014 0.0014 0 0 0.3 0.3 No COPEC: QL<ESV
4-Bromophenyl Phenyl Ether 101-55-3 mg/L 0.002 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.7 0.7 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0042 0.0042 -- 0.0042 0.0042 0 1 4.2 4.2 Category 2: QL>ESV
4-Chloroaniline 106-47-8 mg/L 0.0008 USEPA R4 -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 1 4.3 4.3 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/L -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/L -- -- -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/L 0.058 USEPA R4 -- -- 1 0 1 0.0058 0.0058 -- 0.0058 0.0058 0 0 0.1 0.1 No COPEC: QL<ESV
4,6-Dinitro-2-Methylphenol 534-52-1 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/L 0.0041 USEPA R4 -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.3 0.3 No COPEC: QL<ESV
Benzoic acid 65-85-0 mg/L 9 NCDEQ -- -- 1 0 1 0.0111 0.0111 -- 0.0111 0.0111 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Alcohol 100-51-6 mg/L 0.5 NCDEQ -- -- 1 0 1 0.0034 0.0034 -- 0.0034 0.0034 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/L 0.019 NCDEQ -- -- 1 0 1 0.00075 0.00075 -- 0.00075 0.00075 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/L 9.2 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/L 0.005 NCDEQ -- -- 1 0 1 0.00085 0.00085 -- 0.00085 0.00085 0 0 0.2 0.2 No COPEC: QL<ESV
2 of 5
Table C-11
Summary Surface Water Screening - WY Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
Di-N-Butyl Phthalate 84-74-2 mg/L 0.0095 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.1 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/L 0.215 USEPA R4 -- -- 1 0 1 0.00086 0.00086 -- 0.00086 0.00086 0 0 0.0 0.0 No COPEC: QL<ESV
Dibenzofuran 132-64-9 mg/L 0.004 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.5 0.5 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/L 1.2 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethyl Phthalate 131-11-3 mg/L 3.4 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobenzene 118-74-1 mg/L 0.00015 USEPA R4 -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 1 7.3 7.3 Category 2: QL>ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 1.8 1.8 Category 2: QL>ESV
Hexachlorocyclopentadiene 77-47-4 mg/L 0.00007 NCDEQ -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 25.7 25.7 Category 2: QL>ESV
Hexachloroethane 67-72-1 mg/L 0.012 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.1 0.1 No COPEC: QL<ESV
Isophorone 78-59-1 mg/L 0.92 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodi-N-Propylamine 621-64-7 mg/L -- -- -- -- 1 0 1 0.0021 0.0021 -- 0.0021 0.0021 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodimethylamine 62-75-9 mg/L 17 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodiphenylamine 86-30-6 mg/L 0.29 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
Nitrobenzene 98-95-3 mg/L 4.6 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachlorophenol 87-86-5 mg/L 0.015 USEPA R4 -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.2 0.2 No COPEC: QL<ESV
Phenol 108-95-2 mg/L 0.16 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/L 0.41 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/L 0.13 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloropropene 563-58-6 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,1,1-Trichloroethane 71-55-6 mg/L 2.5 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/L 0.085 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/L 2.3 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/L 0.2 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dibromo-3-Chloropropane 96-12-8 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dibromoethane (Ethylene Dibromide) 106-93-4 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/L 2 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-dichloroethene (cis+trans) 540-59-0 mg/L 0.97 USEPA R4 -- -- 1 0 1 0.0044 0.0044 -- 0.0044 0.0044 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/L 0.52 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,3-Trichlorobenzene 87-61-6 mg/L 0.008 USEPA R4 -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.3 0.3 No COPEC: QL<ESV
1,2,3-Trichloropropane 96-18-4 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trimethylbenzene 95-63-6 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dichloropropane 142-28-9 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
1,3,5-Trimethylbenzene (Mesitylene) 108-67-8 mg/L 0.63 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.2 0.2 No COPEC: QL<ESV
2-Chlorotoluene 95-49-8 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/L 0.099 USEPA R4 -- -- 1 0 1 0.0038 0.0038 -- 0.0038 0.0038 0 0 0.0 0.0 No COPEC: QL<ESV
2,2-Dichloropropane 594-20-7 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
3 of 5
Table C-11
Summary Surface Water Screening - WY Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
4-Chlorotoluene 106-43-4 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Acetone 67-64-1 mg/L 2 NCDEQ -- -- 1 0 1 0.01 0.01 -- 0.01 0.01 0 0 0.0 0.0 No COPEC: QL<ESV
Benzene 71-43-2 mg/L 0.16 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromobenzene 108-86-1 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
Bromochloromethane 74-97-5 mg/L -- -- -- -- 1 0 1 0.0022 0.0022 -- 0.0022 0.0022 0 0 -- -- Category 4: No ESV & ND
Bromodichloromethane 75-27-4 mg/L 0.34 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/L 0.23 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/L 0.00004 NCDEQ -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 1 62.5 62.5 Category 2: QL>ESV
Carbon Tetrachloride 56-23-5 mg/L 0.077 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/L 0.14 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/L 0.14 USEPA R4 -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
Chloromethane 74-87-3 mg/L -- -- -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 -- -- Category 4: No ESV & ND
cis-1,2-Dichloroethene 156-59-2 mg/L 0.62 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
cis-1,3-Dichloropropene 10061-01-5 mg/L 0.0017 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Dibromochloromethane 124-48-1 mg/L 0.32 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/L -- -- -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/L 0.097 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 1 1.8 1.8 Category 2: QL>ESV
Isopropyl Ether 108-20-3 mg/L 20 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Isopropylbenzene (Cumene) 98-82-8 mg/L 0.25 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
M,P-Xylene 179601-23-1 mg/L 0.42 See Notes -- -- 1 0 1 0.0031 0.0031 -- 0.0031 0.0031 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Ethyl Ketone 78-93-3 mg/L 26 NCDEQ -- -- 1 0 1 0.0049 0.0049 -- 0.0049 0.0049 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/L 26 NCDEQ -- -- 1 0 1 0.0036 0.0036 -- 0.0036 0.0036 0 0 0.0 0.0 No COPEC: QL<ESV
Methylene Chloride 75-09-2 mg/L 11 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.0 0.0 No COPEC: QL<ESV
N-Butylbenzene 104-51-8 mg/L 0.0039 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.5 0.5 No COPEC: QL<ESV
N-Propylbenzene 103-65-1 mg/L 0.08 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 0 0.0 0.0 No COPEC: QL<ESV
O-Xylene (1,2-Dimethylbenzene) 95-47-6 mg/L 0.6 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
p-Cymene (p-Isopropyltoluene) 99-87-6 mg/L 0.32 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.0 0.0 No COPEC: QL<ESV
Sec-Butylbenzene 135-98-8 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/L 0.032 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
T-Butylbenzene 98-06-6 mg/L -- -- -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Alcohol 75-65-0 mg/L -- -- -- -- 1 0 1 0.0577 0.0577 -- 0.0577 0.0577 0 0 -- -- Category 4: No ESV & ND
Tert-Butyl Methyl Ether 1634-04-4 mg/L 34 NCDEQ -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/L 0.053 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/L 0.011 NCDEQ -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.1 0.1 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/L 0.558 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/L 0.0017 USEPA R4 -- -- 1 0 1 0.0016 0.0016 -- 0.0016 0.0016 0 0 0.9 0.9 No COPEC: QL<ESV
Trichloroethylene 79-01-6 mg/L 0.22 USEPA R4 -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 0.0 0.0 No COPEC: QL<ESV
4 of 5
Table C-11
Summary Surface Water Screening - WY Wetland/SB Ditch
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
Trichlorofluoromethane 75-69-4 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/L 0.016 USEPA R4 -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.1 0.1 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/L 0.93 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
Notes
The surface water screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
5 of 5
Table C-12
Summary Soil Screening - Floodplain Upland Forest
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*Mean ND=QL* ND=0* ND=QL* Max
Mean
NDQL
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg -- -- 0.135 0.041 10 2 8 0.00071 0.00076 ABL-SB005 0.135 0.018195 0 0 -- -- Category 3: No ESV & Detect
Acenaphthylene 208-96-8 mg/kg -- -- -- -- 10 0 10 0.00064 0.00069 -- 0.00069 0.000671 0 0 -- -- Category 4: No ESV & ND
Anthracene 120-12-7 mg/kg -- -- 0.252 0.0198 10 5 5 0.00058 0.00062 ABL-SB005 0.252 0.041934 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]anthracene 56-55-3 mg/kg -- -- 1.04 0.0192 10 9 1 0.001 0.0011 ABL-SB005 1.04 0.21141 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]pyrene 50-32-8 mg/kg -- -- 1.1 0.0208 10 9 1 0.00071 0.00076 ABL-SB005 1.1 0.227543 0 0 -- -- Category 3: No ESV & Detect
Benzo[b]fluoranthene 205-99-2 mg/kg -- -- 1.48 0.0172 10 10 0 0.001 0.0021 ABL-SB005 1.48 0.335 0 0 -- -- Category 3: No ESV & Detect
Benzo[g,h,i]perylene 191-24-2 mg/kg -- -- 0.609 0.0177 10 9 1 0.0015 0.0017 ABL-SB005 0.609 0.14953 0 0 -- -- Category 3: No ESV & Detect
Benzo[k]fluoranthene 207-08-9 mg/kg -- -- 0.444 0.0334 10 8 2 0.00057 0.00061 ABL-SB005 0.444 0.108629 0 0 -- -- Category 3: No ESV & Detect
Chrysene 218-01-9 mg/kg -- -- 1.1 0.0218 10 9 1 0.00069 0.00074 ABL-SB005 1.1 0.228811 0 0 -- -- Category 3: No ESV & Detect
Dibenz(A,H)Anthracene 53-70-3 mg/kg -- -- 0.199 0.0162 10 8 2 0.0016 0.0017 ABL-SB005 0.199 0.04626 0 0 -- -- Category 3: No ESV & Detect
Fluoranthene 206-44-0 mg/kg -- -- 1.58 0.0246 10 9 1 0.0018 0.0037 ABL-SB005 1.58 0.32769 0 0 -- -- Category 3: No ESV & Detect
Fluorene 86-73-7 mg/kg -- -- 0.105 0.0312 10 2 8 0.0006 0.00065 ABL-SB005 0.105 0.014124 0 0 -- -- Category 3: No ESV & Detect
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg -- -- 0.57 0.0155 10 9 1 0.0013 0.0014 ABL-SB005 0.57 0.1304 0 0 -- -- Category 3: No ESV & Detect
Naphthalene 91-20-3 mg/kg -- -- 0.0178 0.0178 10 1 9 0.0009 0.00097 ABL-SB005 0.0178 0.002626 0 0 -- -- Category 3: No ESV & Detect
Phenanthrene 85-01-8 mg/kg -- -- 1.13 0.0294 10 8 2 0.0016 0.0017 ABL-SB005 1.13 0.19804 0 0 -- -- Category 3: No ESV & Detect
Pyrene 129-00-0 mg/kg -- -- 1.33 0.0228 10 9 1 0.0015 0.003 ABL-SB005 1.33 0.2684 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=0 mg/kg 1.1 EPA R4 7.872 0.0172 10 10 0 0.00987 0.01283 ABL-SB005 7.872 1.70484 3 3 7.2 1.5 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg 1.1 EPA R4 7.872 0.02176 10 10 0 0.00987 0.01283 ABL-SB005 7.872 1.7054115 3 3 7.2 1.6 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg 1.1 EPA R4 7.872 0.02632 10 10 0 0.00987 0.01283 ABL-SB005 7.872 1.705983 3 3 7.2 1.6 Category 1: Max EPC>ESV
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg 29 EPA R4 3.2198 0.0246 10 9 1 0.00683 0.00886 ABL-SB005 3.2198 0.59985 0 0 0.1 0.0 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg 29 EPA R4 3.220135 0.027295 10 9 1 0.00683 0.00886 ABL-SB005 3.220135 0.601565 0 0 0.1 0.0 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg 29 EPA R4 3.22047 0.02999 10 9 1 0.00683 0.00886 ABL-SB005 3.22047 0.60328 0 0 0.1 0.0 No COPEC: EPC<ESV
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg -- -- -- -- 10 0 10 0.00086 0.00093 -- 0.00093 0.0009 0 0 -- -- Category 4: No ESV & ND
2-Methylnaphthalene 91-57-6 mg/kg -- -- 0.0179 0.0179 10 1 9 0.00086 0.00093 ABL-SB005 0.0179 0.0026 0 0 -- -- Category 3: No ESV & Detect
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/kg -- -- -- -- 10 0 10 0.0126 0.0138 -- 0.0138 0.01313 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/kg -- -- -- -- 10 0 10 0.0167 0.0182 -- 0.0182 0.01731 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/kg -- -- -- -- 10 0 10 0.0118 0.0129 -- 0.0129 0.01226 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/kg -- -- -- -- 10 0 10 0.0031 0.0034 -- 0.0034 0.00325 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/kg -- -- -- -- 10 0 10 0.0083 0.009 -- 0.009 0.00858 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/kg -- -- -- -- 10 0 10 0.0088 0.0097 -- 0.0097 0.00919 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/kg -- -- 0.0563 0.0563 10 1 9 0.0108 0.0118 ABL-SB005 0.0563 0.01573 0 0 -- -- Category 3: No ESV & Detect
Total PCBs (Aroclors) totPCB_ND=0 mg/kg 0.041 EPA R4 0.0563 0.0563 10 1 9 0.0721 0.0788 ABL-SB005 0.0788 0.00563 1 1 1.9 0.1 Category 1: Max EPC>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/kg 0.041 EPA R4 0.0883 0.0883 10 1 9 0.0721 0.0788 ABL-SB005 0.0883 0.04254 1 1 2.2 1.0 Category 1: Max EPC>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/kg 0.041 EPA R4 0.1203 0.1203 10 1 9 0.0721 0.0788 ABL-SB005 0.1203 0.07945 10 10 2.9 1.9 Category 1: Max EPC>ESV
General Chemistry
Moisture, Percent MOIST % -- -- 34.6 29.7 10 10 0 0.1 0.1 ABL-SB003 34.6 32.14 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection Rationale
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
1 of 2
Table C-12
Summary Soil Screening - Floodplain Upland Forest
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The soil screening levels presented above are the recommended screening levels from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 3: Region 4 Soil Screening Values for Hazardous Waste Sites.
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ND=0 - Non-detect values presented as 0.
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
2 of 2
Table C-13
Summary Soil Screening - Substation A
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-Detects Min Max
Max Detect or
QL*Mean ND=QL* ND=0* ND=QL* Max
Mean
NDQL
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg -- -- 0.0291 0.0291 5 1 4 0.00067 0.00077 ABL-SB011 0.0291 0.006386 0 0 -- -- Category 3: No ESV & Detect
Acenaphthylene 208-96-8 mg/kg -- -- 0.0136 0.0136 5 1 4 0.0006 0.0007 ABL-SB011 0.0136 0.003234 0 0 -- -- Category 3: No ESV & Detect
Anthracene 120-12-7 mg/kg -- -- 0.0729 0.0729 5 1 4 0.00055 0.00063 ABL-SB011 0.0729 0.015042 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]anthracene 56-55-3 mg/kg -- -- 0.271 0.0281 5 5 0 0.00098 0.0011 ABL-SB011 0.271 0.08154 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]pyrene 50-32-8 mg/kg -- -- 0.318 0.0286 5 5 0 0.00066 0.00077 ABL-SB011 0.318 0.09332 0 0 -- -- Category 3: No ESV & Detect
Benzo[b]fluoranthene 205-99-2 mg/kg -- -- 0.421 0.0504 5 5 0 0.00095 0.0011 ABL-SB011 0.421 0.1348 0 0 -- -- Category 3: No ESV & Detect
Benzo[g,h,i]perylene 191-24-2 mg/kg -- -- 0.232 0.0227 5 5 0 0.0014 0.0017 ABL-SB011 0.232 0.06956 0 0 -- -- Category 3: No ESV & Detect
Benzo[k]fluoranthene 207-08-9 mg/kg -- -- 0.142 0.0189 5 5 0 0.00053 0.00062 ABL-SB011 0.142 0.0473 0 0 -- -- Category 3: No ESV & Detect
Chrysene 218-01-9 mg/kg -- -- 0.272 0.0325 5 5 0 0.00065 0.00075 ABL-SB011 0.272 0.0855 0 0 -- -- Category 3: No ESV & Detect
Dibenz(A,H)Anthracene 53-70-3 mg/kg -- -- 0.0591 0.0591 5 1 4 0.0015 0.0017 ABL-SB011 0.0591 0.01308 0 0 -- -- Category 3: No ESV & Detect
Fluoranthene 206-44-0 mg/kg -- -- 0.387 0.046 5 5 0 0.0017 0.002 ABL-SB011 0.387 0.12958 0 0 -- -- Category 3: No ESV & Detect
Fluorene 86-73-7 mg/kg -- -- 0.0222 0.0222 5 1 4 0.00057 0.00066 ABL-SB011 0.0222 0.004924 0 0 -- -- Category 3: No ESV & Detect
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg -- -- 0.19 0.0205 5 5 0 0.0012 0.0014 ABL-SB011 0.19 0.05762 0 0 -- -- Category 3: No ESV & Detect
Naphthalene 91-20-3 mg/kg -- -- -- -- 5 0 5 0.00085 0.00098 -- 0.00098 0.00089 0 0 -- -- Category 4: No ESV & ND
Phenanthrene 85-01-8 mg/kg -- -- 0.259 0.0158 5 5 0 0.0015 0.0017 ABL-SB011 0.259 0.07092 0 0 -- -- Category 3: No ESV & Detect
Pyrene 129-00-0 mg/kg -- -- 0.324 0.0375 5 5 0 0.0014 0.0016 ABL-SB011 0.324 0.10108 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=0 mg/kg 1.1 EPA R4 2.2291 0.2524 5 5 0 0.00927 0.01074 ABL-SB011 2.2291 0.68254 1 1 2.0 0.6 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg 1.1 EPA R4 2.2291 0.25315 5 5 0 0.00927 0.01074 ABL-SB011 2.2291 0.68317 1 1 2.0 0.6 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg 1.1 EPA R4 2.2291 0.2539 5 5 0 0.00927 0.01074 ABL-SB011 2.2291 0.6838 1 1 2.0 0.6 Category 1: Max EPC>ESV
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg 29 EPA R4 0.7838 0.0657 5 5 0 0.00644 0.00744 ABL-SB011 0.7838 0.22806 0 0 0.0 0.0 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg 29 EPA R4 0.784225 0.06757 5 5 0 0.00644 0.00744 ABL-SB011 0.784225 0.229518 0 0 0.0 0.0 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg 29 EPA R4 0.78465 0.06944 5 5 0 0.00644 0.00744 ABL-SB011 0.78465 0.230976 0 0 0.0 0.0 No COPEC: EPC<ESV
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg -- -- -- -- 5 0 5 0.00081 0.00094 -- 0.00094 0.00085 0 0 -- -- Category 4: No ESV & ND
2-Methylnaphthalene 91-57-6 mg/kg -- -- -- -- 5 0 5 0.00081 0.00094 -- 0.00094 0.00085 0 0 -- -- Category 4: No ESV & ND
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/kg -- -- -- -- 5 0 5 0.0117 0.0138 -- 0.0138 0.01256 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/kg -- -- -- -- 5 0 5 0.0155 0.0181 -- 0.0181 0.01654 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/kg -- -- -- -- 5 0 5 0.011 0.0128 -- 0.0128 0.01172 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/kg -- -- -- -- 5 0 5 0.0029 0.0034 -- 0.0034 0.00312 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/kg -- -- -- -- 5 0 5 0.0077 0.009 -- 0.009 0.0082 0 0 -- -- Category 4: No ESV & ND
PCB-1254 (Aroclor 1254) 11097-69-1 mg/kg -- -- -- -- 5 0 5 0.0082 0.0096 -- 0.0096 0.00876 0 0 -- -- Category 4: No ESV & ND
PCB-1260 (Aroclor 1260) 11096-82-5 mg/kg -- -- -- -- 5 0 5 0.0101 0.0118 -- 0.0118 0.01076 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/kg 0.041 EPA R4 -- -- 5 0 5 0.0671 0.0785 -- 0.0785 0 0 0 1.9 0.0 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/kg 0.041 EPA R4 -- -- 5 0 5 0.0671 0.0785 -- 0.0785 0.03583 0 0 1.9 0.9 Category 2: QL>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/kg 0.041 EPA R4 -- -- 5 0 5 0.0671 0.0785 -- 0.0785 0.07166 5 5 1.9 1.7 Category 2: QL>ESV
General Chemistry
Moisture, Percent MOIST % -- -- 35 25.6 5 5 0 0.1 0.1 ABL-SB015 35 28.7 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological
Screening Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
1 of 2
Table C-13
Summary Soil Screening - Substation A
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The soil screening levels presented above are the recommended screening levels from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 3: Region 4 Soil Screening Values for Hazardous Waste Sites.
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ND=0 - Non-detect values presented as 0.
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
2 of 2
Table C-14
Summary Soil Screening - Substation A
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*Mean ND=QL* ND=0* ND=QL* Max
Mean
NDQL
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/kg -- -- 0.249 0.249 5 1 4 0.00062 0.0007 ABL-SB017 0.249 0.050334 0 0 -- -- Category 3: No ESV & Detect
Acenaphthylene 208-96-8 mg/kg -- -- 0.0398 0.0197 5 3 2 0.00056 0.00063 ABL-SB020 0.0398 0.01792 0 0 -- -- Category 3: No ESV & Detect
Anthracene 120-12-7 mg/kg -- -- 0.581 0.0175 5 4 1 0.00051 0.00057 ABL-SB017 0.581 0.136406 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]anthracene 56-55-3 mg/kg -- -- 5.2 0.0539 5 5 0 0.00095 0.0091 ABL-SB017 5.2 1.1492 0 0 -- -- Category 3: No ESV & Detect
Benzo[a]pyrene 50-32-8 mg/kg -- -- 6.66 0.0559 5 5 0 0.00065 0.0062 ABL-SB017 6.66 1.4285 0 0 -- -- Category 3: No ESV & Detect
Benzo[b]fluoranthene 205-99-2 mg/kg -- -- 9.66 0.0986 5 5 0 0.00093 0.0089 ABL-SB017 9.66 2.10992 0 0 -- -- Category 3: No ESV & Detect
Benzo[g,h,i]perylene 191-24-2 mg/kg -- -- 4.86 0.0412 5 5 0 0.0014 0.0135 ABL-SB017 4.86 1.03558 0 0 -- -- Category 3: No ESV & Detect
Benzo[k]fluoranthene 207-08-9 mg/kg -- -- 3.6 0.035 5 5 0 0.00052 0.005 ABL-SB017 3.6 0.77952 0 0 -- -- Category 3: No ESV & Detect
Chrysene 218-01-9 mg/kg -- -- 5.53 0.06 5 5 0 0.00063 0.006 ABL-SB017 5.53 1.22194 0 0 -- -- Category 3: No ESV & Detect
Dibenz(A,H)Anthracene 53-70-3 mg/kg -- -- 1.7 0.0142 5 5 0 0.0015 0.014 ABL-SB017 1.7 0.36224 0 0 -- -- Category 3: No ESV & Detect
Fluoranthene 206-44-0 mg/kg -- -- 5.35 0.0801 5 5 0 0.0016 0.0157 ABL-SB017 5.35 1.19702 0 0 -- -- Category 3: No ESV & Detect
Fluorene 86-73-7 mg/kg -- -- 0.209 0.209 5 1 4 0.00053 0.00059 ABL-SB017 0.209 0.042252 0 0 -- -- Category 3: No ESV & Detect
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/kg -- -- 4.26 0.0374 5 5 0 0.0012 0.011 ABL-SB017 4.26 0.9098 0 0 -- -- Category 3: No ESV & Detect
Naphthalene 91-20-3 mg/kg -- -- 0.12 0.12 5 1 4 0.00079 0.00089 ABL-SB017 0.12 0.024678 0 0 -- -- Category 3: No ESV & Detect
Phenanthrene 85-01-8 mg/kg -- -- 2.56 0.0349 5 5 0 0.0014 0.0137 ABL-SB017 2.56 0.56342 0 0 -- -- Category 3: No ESV & Detect
Pyrene 129-00-0 mg/kg -- -- 4.49 0.0665 5 5 0 0.0013 0.0128 ABL-SB017 4.49 1.0071 0 0 -- -- Category 3: No ESV & Detect
Total HMW PAHs PAHs_highMW_ND=0 mg/kg 1.1 EPA R4 45.96 0.4627 5 5 0 0.00908 0.0865 ABL-SB017 45.96 10.0038 3 3 41.8 9.1 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/kg 1.1 EPA R4 45.96 0.4627 5 5 0 0.00908 0.0865 ABL-SB017 45.96 10.0038 3 3 41.8 9.1 Category 1: Max EPC>ESV
Total HMW PAHs PAHs_highMW_ND=LOD mg/kg 1.1 EPA R4 45.96 0.4627 5 5 0 0.00908 0.0865 ABL-SB017 45.96 10.0038 3 3 41.8 9.1 Category 1: Max EPC>ESV
Total LMW PAHs PAHs_lowMW_ND=0 mg/kg 29 EPA R4 9.0979 0.115 5 5 0 0.00614 0.03241 ABL-SB017 9.0979 2.03002 0 0 0.3 0.1 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/kg 29 EPA R4 9.0979 0.116575 5 5 0 0.00614 0.03241 ABL-SB017 9.0979 2.031025 0 0 0.3 0.1 No COPEC: EPC<ESV
Total LMW PAHs PAHs_lowMW_ND=LOD mg/kg 29 EPA R4 9.0979 0.11815 5 5 0 0.00614 0.03241 ABL-SB017 9.0979 2.03203 0 0 0.3 0.1 No COPEC: EPC<ESV
Other Semi-Volatile Organic Compounds (SVOCs)
1-Methylnaphthalene 90-12-0 mg/kg -- -- 0.0262 0.0262 5 1 4 0.00076 0.00085 ABL-SB017 0.0262 0.00589 0 0 -- -- Category 3: No ESV & Detect
2-Methylnaphthalene 91-57-6 mg/kg -- -- 0.0419 0.0419 5 1 4 0.00076 0.00085 ABL-SB017 0.0419 0.00903 0 0 -- -- Category 3: No ESV & Detect
Polychlorinated biphenyls (PCBs)
PCB-1016 (Aroclor 1016) 12674-11-2 mg/kg -- -- -- -- 5 0 5 0.0112 0.0124 -- 0.0124 0.01174 0 0 -- -- Category 4: No ESV & ND
PCB-1221 (Aroclor 1221) 11104-28-2 mg/kg -- -- -- -- 5 0 5 0.0147 0.0163 -- 0.0163 0.01544 0 0 -- -- Category 4: No ESV & ND
PCB-1232 (Aroclor 1232) 11141-16-5 mg/kg -- -- -- -- 5 0 5 0.0104 0.0116 -- 0.0116 0.01094 0 0 -- -- Category 4: No ESV & ND
PCB-1242 (Aroclor 1242) 53469-21-9 mg/kg -- -- -- -- 5 0 5 0.0028 0.0031 -- 0.0031 0.00292 0 0 -- -- Category 4: No ESV & ND
PCB-1248 (Aroclor 1248) 12672-29-6 mg/kg -- -- 0.117 0.117 5 1 4 0.0073 0.0081 ABL-SB017 0.117 0.0296 0 0 -- -- Category 3: No ESV & Detect
PCB-1254 (Aroclor 1254) 11097-69-1 mg/kg -- -- 0.0875 0.0875 5 1 4 0.0078 0.0087 ABL-SB017 0.0875 0.02412 0 0 -- -- Category 3: No ESV & Detect
PCB-1260 (Aroclor 1260) 11096-82-5 mg/kg -- -- -- -- 5 0 5 0.0095 0.0106 -- 0.0106 0.01002 0 0 -- -- Category 4: No ESV & ND
Total PCBs (Aroclors) totPCB_ND=0 mg/kg 0.041 EPA R4 0.2045 0.2045 5 1 4 0.0637 0.0708 ABL-SB017 0.2045 0.0409 1 1 5.0 1.0 Category 1: Max EPC>ESV
Total PCBs (Aroclors) totPCB_ND=QL/2 mg/kg 0.041 EPA R4 0.2288 0.2288 5 1 4 0.0637 0.0708 ABL-SB017 0.2288 0.07284 1 1 5.6 1.8 Category 1: Max EPC>ESV
Total PCBs (Aroclors) totPCB_ND=LOD mg/kg 0.041 EPA R4 0.2531 0.2531 5 1 4 0.0637 0.0708 ABL-SB017 0.2531 0.10478 5 5 6.2 2.6 Category 1: Max EPC>ESV
General Chemistry
Moisture, Percent MOIST % -- -- 28.3 19.3 5 5 0 0.1 0.1 ABL-SB019 28.3 23.76 0 0 -- -- Category 3: No ESV & Detect
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
1 of 2
Table C-14
Summary Soil Screening - Substation A
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Notes
The soil screening levels presented above are the recommended screening levels from the USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 3: Region 4 Soil Screening Values for Hazardous Waste Sites.
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/kg - Milligrams per kilogram
Min - Minimum
ND=0 - Non-detect values presented as 0.
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
2 of 2
Table C-15
Summary Groundwater Screening - Floodplain
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
Inorganics
Cyanide 57-12-5 mg/L 0.005 NCDEQ 0.11 0.005 12 8 4 0.004 0.004 ABL-MW005 0.11 0.030866667 7 7 22.0 6.2 Category 1/5: Max EPC>ESV
Cyanide, Available 57-12-5_AVAIL mg/L 0.005 NCDEQ 0.027 0.00031 15 8 7 0.0003 0.0003 ABL-MW005 0.027 0.005222 4 4 5.4 1.0 Category 1/5: Max EPC>ESV
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 0.76 0.054 24 18 6 0.0068 0.2 ABL-MW005 0.76 0.178083333 0 0 0.4 0.1 No COPEC: EPC<ESV
Metals
Antimony 7440-36-0 mg/L 5.3 NCDEQ -- -- 1 0 1 0.0053 0.0053 -- 0.0053 0.0053 0 0 0.0 0.0 No COPEC: QL<ESV
Arsenic 7440-38-2 mg/L 0.15 NCDEQ -- -- 1 0 1 0.0046 0.0046 -- 0.0046 0.0046 0 0 0.0 0.0 No COPEC: QL<ESV
Barium 7440-39-3 mg/L 0.22 USEPA R4 0.01 0.01 1 1 0 0.0023 0.0023 ABL-MW005 0.01 0.01 0 0 0.0 0.0 No COPEC: EPC<ESV
Beryllium 7440-41-7 mg/L 0.0065 NCDEQ -- -- 1 0 1 0.0002 0.0002 -- 0.0002 0.0002 0 0 0.0 0.0 No COPEC: QL<ESV
Cadmium 7440-43-9 mg/L 0.000702 See Notes -- -- 1 0 1 0.002 0.002 -- 0.002 0.002 0 1 2.8 2.8 Category 2: QL>ESV
Chromium, total 7440-47-3 mg/L 0.07229 See Notes 0.0019 0.0019 1 1 0 0.0012 0.0012 ABL-MW005 0.0019 0.0019 0 0 0.0 0.0 No COPEC: EPC<ESV
Cobalt 7440-48-4 mg/L 0.0016 NCDEQ 0.072 0.072 1 1 0 0.00095 0.00095 ABL-MW005 0.072 0.072 1 1 45.0 45.0 Category 1/5: Max EPC>ESV
Copper 7440-50-8 mg/L 0.00873 See Notes -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.2 0.2 No COPEC: QL<ESV
Lead 7439-92-1 mg/L 0.00243 See Notes -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 1 1.6 1.6 Category 2: QL>ESV
Mercury 7439-97-6 mg/L 0.000012 NCDEQ -- -- 1 0 1 0.000091 0.000091 -- 0.000091 0.000091 0 1 7.6 7.6 Category 2: QL>ESV
Nickel 7440-02-0 mg/L 0.05068 See Notes -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
Selenium 7782-49-2 mg/L 0.0151 NCDEQ -- -- 1 0 1 0.0064 0.0064 -- 0.0064 0.0064 0 0 0.4 0.4 No COPEC: QL<ESV
Silver 7440-22-4 mg/L 0.00006 NCDEQ -- -- 1 0 1 0.00089 0.00089 -- 0.00089 0.00089 0 1 14.8 14.8 Category 2: QL>ESV
Thallium 7440-28-0 mg/L 0.006 USEPA R4 -- -- 1 0 1 0.0088 0.0088 -- 0.0088 0.0088 0 1 1.5 1.5 Category 2: QL>ESV
Tin 7440-31-5 mg/L 0.18 USEPA R4 -- -- 1 0 1 0.0051 0.0051 -- 0.0051 0.0051 0 0 0.0 0.0 No COPEC: QL<ESV
Vanadium 7440-62-2 mg/L 0.027 USEPA R4 -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.1 0.1 No COPEC: QL<ESV
Zinc 7440-66-6 mg/L 0.11419 See Notes -- -- 1 0 1 0.0087 0.0087 -- 0.0087 0.0087 0 0 0.1 0.1 No COPEC: QL<ESV
Polycyclic Aromatic Hydrocarbons (PAHs)
Acenaphthene 83-32-9 mg/L 0.056 See Notes -- -- 1 0 1 0.0009 0.0009 -- 0.0009 0.0009 0 0 0.0 0.0 No COPEC: QL<ESV
Acenaphthylene 208-96-8 mg/L 0.307 See Notes -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.0 0.0 No COPEC: QL<ESV
Anthracene 120-12-7 mg/L 0.021 See Notes -- -- 1 0 1 0.00082 0.00082 -- 0.00082 0.00082 0 0 0.0 0.0 No COPEC: QL<ESV
Benzo[a]anthracene 56-55-3 mg/L 0.0022 See Notes -- -- 1 0 1 0.00065 0.00065 -- 0.00065 0.00065 0 0 0.3 0.3 No COPEC: QL<ESV
Benzo[a]pyrene 50-32-8 mg/L 0.00096 See Notes -- -- 1 0 1 0.00084 0.00084 -- 0.00084 0.00084 0 0 0.9 0.9 No COPEC: QL<ESV
Benzo[b]fluoranthene 205-99-2 mg/L 0.00068 See Notes -- -- 1 0 1 0.0031 0.0031 -- 0.0031 0.0031 0 1 4.6 4.6 Category 2: QL>ESV
Benzo[g,h,i]perylene 191-24-2 mg/L 0.00044 See Notes -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 1 2.3 2.3 Category 2: QL>ESV
Benzo[k]fluoranthene 207-08-9 mg/L 0.00064 See Notes -- -- 1 0 1 0.0014 0.0014 -- 0.0014 0.0014 0 1 2.2 2.2 Category 2: QL>ESV
Chrysene 218-01-9 mg/L 0.002 See Notes -- -- 1 0 1 0.0006 0.0006 -- 0.0006 0.0006 0 0 0.3 0.3 No COPEC: QL<ESV
Dibenz(A,H)Anthracene 53-70-3 mg/L 0.00028 See Notes -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 1 4.3 4.3 Category 2: QL>ESV
Fluoranthene 206-44-0 mg/L 0.0071 See Notes -- -- 1 0 1 0.00088 0.00088 -- 0.00088 0.00088 0 0 0.1 0.1 No COPEC: QL<ESV
Fluorene 86-73-7 mg/L 0.039 See Notes -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
Indeno(1,2,3-C,D)Pyrene 193-39-5 mg/L 0.00028 See Notes -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 1 4.3 4.3 Category 2: QL>ESV
Naphthalene 91-20-3 mg/L 0.194 See Notes -- -- 1 0 1 0.00083 0.00083 -- 0.00083 0.00083 0 0 0.0 0.0 No COPEC: QL<ESV
Phenanthrene 85-01-8 mg/L 0.019 See Notes -- -- 1 0 1 0.00091 0.00091 -- 0.00091 0.00091 0 0 0.0 0.0 No COPEC: QL<ESV
Pyrene 129-00-0 mg/L 0.01 See Notes -- -- 1 0 1 0.00075 0.00075 -- 0.00075 0.00075 0 0 0.1 0.1 No COPEC: QL<ESV
Total HMW PAHs PAHs_highMW_ND=0 mg/L -- -- -- -- 1 0 1 0.01074 0.01074 -- 0.01074 0 0 0 -- -- Category 4: No ESV & ND
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
1 of 6
Table C-15
Summary Groundwater Screening - Floodplain
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
Total HMW PAHs PAHs_highMW_ND=LOD mg/L -- -- -- -- 1 0 1 0.01074 0.01074 -- 0.01074 0.01074 0 0 -- -- Category 4: No ESV & ND
Total HMW PAHs PAHs_highMW_ND=QL/2 mg/L -- -- -- -- 1 0 1 0.01074 0.01074 -- 0.01074 0.00537 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=0 mg/L -- -- -- -- 1 0 1 0.00644 0.00644 -- 0.00644 0 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=LOD mg/L -- -- -- -- 1 0 1 0.00644 0.00644 -- 0.00644 0.00644 0 0 -- -- Category 4: No ESV & ND
Total LMW PAHs PAHs_lowMW_ND=QL/2 mg/L -- -- -- -- 1 0 1 0.00644 0.00644 -- 0.00644 0.00322 0 0 -- -- Category 4: No ESV & ND
Other Semi-Volatile Organic Compounds (SVOCs)
1-Naphthylamine 134-32-7 mg/L -- -- -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 -- -- Category 4: No ESV & ND
1,2-Dichlorobenzene 95-50-1 mg/L 0.47 NCDEQ -- -- 1 0 1 0.00063 0.00063 -- 0.00063 0.00063 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4-Trichlorobenzene 120-82-1 mg/L 0.061 NCDEQ -- -- 1 0 1 0.00066 0.00066 -- 0.00066 0.00066 0 0 0.0 0.0 No COPEC: QL<ESV
1,2,4,5-Tetrachlorobenzene 95-94-3 mg/L 0.0083 USEPA R4 -- -- 1 0 1 0.0009 0.0009 -- 0.0009 0.0009 0 0 0.1 0.1 No COPEC: QL<ESV
1,3-Dichlorobenzene 541-73-1 mg/L 0.39 NCDEQ -- -- 1 0 1 0.0007 0.0007 -- 0.0007 0.0007 0 0 0.0 0.0 No COPEC: QL<ESV
1,3-Dinitrobenzene 99-65-0 mg/L 0.022 USEPA R4 -- -- 1 0 1 0.00071 0.00071 -- 0.00071 0.00071 0 0 0.0 0.0 No COPEC: QL<ESV
1,3,5-Trinitrobenzene 99-35-4 mg/L 0.011 USEPA R4 -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.2 0.2 No COPEC: QL<ESV
1,4-Dichlorobenzene 106-46-7 mg/L 0.0094 USEPA R4 -- -- 1 0 1 0.00064 0.00064 -- 0.00064 0.00064 0 0 0.1 0.1 No COPEC: QL<ESV
1,4-Dioxane 123-91-1 mg/L 0.08 NCDEQ -- -- 1 0 1 0.004 0.004 -- 0.004 0.004 0 0 0.1 0.1 No COPEC: QL<ESV
1,4-Naphthoquinone 130-15-4 mg/L -- -- -- -- 1 0 1 0.00073 0.00073 -- 0.00073 0.00073 0 0 -- -- Category 4: No ESV & ND
2-Acetylaminofluorene 53-96-3 mg/L -- -- -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 -- -- Category 4: No ESV & ND
2-Aminonaphthalene (Beta Naphthylamine) 91-59-8 mg/L -- -- -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 -- -- Category 4: No ESV & ND
2-Chloronaphthalene 91-58-7 mg/L 0.11 NCDEQ -- -- 1 0 1 0.00095 0.00095 -- 0.00095 0.00095 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chlorophenol 95-57-8 mg/L 0.018 USEPA R4 -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.1 0.1 No COPEC: QL<ESV
2-Methylnaphthalene 91-57-6 mg/L 0.072 See Notes -- -- 1 0 1 0.00092 0.00092 -- 0.00092 0.00092 0 0 0.0 0.0 No COPEC: QL<ESV
2-Methylphenol (O-Cresol) 95-48-7 mg/L 0.067 USEPA R4 -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
2-Nitroaniline 88-74-4 mg/L 0.017 USEPA R4 -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.1 0.1 No COPEC: QL<ESV
2-Nitrophenol 88-75-5 mg/L 0.073 USEPA R4 -- -- 1 0 1 0.0009 0.0009 -- 0.0009 0.0009 0 0 0.0 0.0 No COPEC: QL<ESV
2-Picoline (Alpha-Picoline) 109-06-8 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
2,3,4,6-Tetrachlorophenol 58-90-2 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.00085 0.00085 -- 0.00085 0.00085 0 0 0.9 0.9 No COPEC: QL<ESV
2,4-Dichlorophenol 120-83-2 mg/L 0.011 USEPA R4 -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.1 0.1 No COPEC: QL<ESV
2,4-Dimethylphenol 105-67-9 mg/L 0.015 USEPA R4 -- -- 1 0 1 0.0047 0.0047 -- 0.0047 0.0047 0 0 0.3 0.3 No COPEC: QL<ESV
2,4-Dinitrophenol 51-28-5 mg/L 0.071 USEPA R4 -- -- 1 0 1 0.012 0.012 -- 0.012 0.012 0 0 0.2 0.2 No COPEC: QL<ESV
2,4-Dinitrotoluene 121-14-2 mg/L 0.044 USEPA R4 -- -- 1 0 1 0.0014 0.0014 -- 0.0014 0.0014 0 0 0.0 0.0 No COPEC: QL<ESV
2,4,5-Trichlorophenol 95-95-4 mg/L 0.0019 USEPA R4 -- -- 1 0 1 0.0014 0.0014 -- 0.0014 0.0014 0 0 0.7 0.7 No COPEC: QL<ESV
2,4,6-Trichlorophenol 88-06-2 mg/L 0.0049 USEPA R4 -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.2 0.2 No COPEC: QL<ESV
2,6-Dichlorophenol 87-65-0 mg/L -- -- -- -- 1 0 1 0.00087 0.00087 -- 0.00087 0.00087 0 0 -- -- Category 4: No ESV & ND
2,6-Dinitrotoluene 606-20-2 mg/L 0.081 USEPA R4 -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
3- & 4-Methylphenol edms_0009 mg/L 0.053 See Notes -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 0 0.0 0.0 No COPEC: QL<ESV
3-Methylcholanthrene 56-49-5 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
3-Nitroaniline 99-09-2 mg/L -- -- -- -- 1 0 1 0.0059 0.0059 -- 0.0059 0.0059 0 0 -- -- Category 4: No ESV & ND
3,3'-Dichlorobenzidine 91-94-1 mg/L 0.0045 USEPA R4 -- -- 1 0 1 0.036 0.036 -- 0.036 0.036 0 1 8.0 8.0 Category 2: QL>ESV
3,3'-Dimethylbenzidine 119-93-7 mg/L -- -- -- -- 1 0 1 0.012 0.012 -- 0.012 0.012 0 0 -- -- Category 4: No ESV & ND
4-Aminobiphenyl (4-Biphenylamine) 92-67-1 mg/L -- -- -- -- 1 0 1 0.0014 0.0014 -- 0.0014 0.0014 0 0 -- -- Category 4: No ESV & ND
2 of 6
Table C-15
Summary Groundwater Screening - Floodplain
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
4-Bromophenyl Phenyl Ether 101-55-3 mg/L 0.002 NCDEQ -- -- 1 0 1 0.00091 0.00091 -- 0.00091 0.00091 0 0 0.5 0.5 No COPEC: QL<ESV
4-Chloro-3-Methylphenol 59-50-7 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 1 1.2 1.2 Category 2: QL>ESV
4-Chloroaniline 106-47-8 mg/L 0.0008 USEPA R4 -- -- 1 0 1 0.0026 0.0026 -- 0.0026 0.0026 0 1 3.3 3.3 Category 2: QL>ESV
4-Chlorophenyl Phenyl Ether 7005-72-3 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
4-Nitroaniline 100-01-6 mg/L -- -- -- -- 1 0 1 0.0059 0.0059 -- 0.0059 0.0059 0 0 -- -- Category 4: No ESV & ND
4-Nitrophenol 100-02-7 mg/L 0.058 USEPA R4 -- -- 1 0 1 0.0023 0.0023 -- 0.0023 0.0023 0 0 0.0 0.0 No COPEC: QL<ESV
4-Nitroquinoline-N-Oxide 56-57-5 mg/L -- -- -- -- 1 0 1 0.012 0.012 -- 0.012 0.012 0 0 -- -- Category 4: No ESV & ND
4,6-Dinitro-2-Methylphenol 534-52-1 mg/L -- -- -- -- 1 0 1 0.012 0.012 -- 0.012 0.012 0 0 -- -- Category 4: No ESV & ND
5-Nitro-O-Toluidine 99-55-8 mg/L -- -- -- -- 1 0 1 0.0018 0.0018 -- 0.0018 0.0018 0 0 -- -- Category 4: No ESV & ND
7,12-Dimethylbenz(A)Anthracene 57-97-6 mg/L -- -- -- -- 1 0 1 0.0014 0.0014 -- 0.0014 0.0014 0 0 -- -- Category 4: No ESV & ND
Acetophenone 98-86-2 mg/L 8.1 NCDEQ -- -- 1 0 1 0.00068 0.00068 -- 0.00068 0.00068 0 0 0.0 0.0 No COPEC: QL<ESV
Alpha, Alpha Dimethylphenethylamine 122-09-8 mg/L -- -- -- -- 1 0 1 0.041 0.041 -- 0.041 0.041 0 0 -- -- Category 4: No ESV & ND
Aniline (Phenylamine, Aminobenzene) 62-53-3 mg/L 0.0041 USEPA R4 -- -- 1 0 1 0.0025 0.0025 -- 0.0025 0.0025 0 0 0.6 0.6 No COPEC: QL<ESV
Aramite (Total) 140-57-8 mg/L -- -- -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 -- -- Category 4: No ESV & ND
Benzyl Alcohol 100-51-6 mg/L 0.5 NCDEQ -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 0.0 0.0 No COPEC: QL<ESV
Benzyl Butyl Phthalate 85-68-7 mg/L 0.019 NCDEQ -- -- 1 0 1 0.0014 0.0014 -- 0.0014 0.0014 0 0 0.1 0.1 No COPEC: QL<ESV
Bis(2-Chloroethoxy) Methane 111-91-1 mg/L 9.2 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
Bis(2-Chloroethyl) Ether (2-Chloroethyl Ether) 111-44-4 mg/L -- -- -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 -- -- Category 4: No ESV & ND
Bis(2-Chloroisopropyl) Ether 108-60-1 mg/L -- -- -- -- 1 0 1 0.00092 0.00092 -- 0.00092 0.00092 0 0 -- -- Category 4: No ESV & ND
Bis(2-Ethylhexyl) Phthalate 117-81-7 mg/L 0.005 NCDEQ -- -- 1 0 1 0.0019 0.0019 -- 0.0019 0.0019 0 0 0.4 0.4 No COPEC: QL<ESV
Di-N-Butyl Phthalate 84-74-2 mg/L 0.0095 NCDEQ -- -- 1 0 1 0.00098 0.00098 -- 0.00098 0.00098 0 0 0.1 0.1 No COPEC: QL<ESV
Di-N-Octylphthalate 117-84-0 mg/L 0.215 USEPA R4 -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 0.0 0.0 No COPEC: QL<ESV
Diallate (total of cis and trans isomers) 2303-16-4 mg/L -- -- -- -- 1 0 1 0.00092 0.00092 -- 0.00092 0.00092 0 0 -- -- Category 4: No ESV & ND
Dibenzofuran 132-64-9 mg/L 0.004 USEPA R4 -- -- 1 0 1 0.00094 0.00094 -- 0.00094 0.00094 0 0 0.2 0.2 No COPEC: QL<ESV
Diethyl Phthalate 84-66-2 mg/L 1.2 NCDEQ -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.0 0.0 No COPEC: QL<ESV
Dimethoate 60-51-5 mg/L 0.0003 NCDEQ -- -- 1 0 1 0.00089 0.00089 -- 0.00089 0.00089 0 1 3.0 3.0 Category 2: QL>ESV
Dimethyl Phthalate 131-11-3 mg/L 3.4 NCDEQ -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 0.0 0.0 No COPEC: QL<ESV
Dinoseb 88-85-7 mg/L 0.003 NCDEQ -- -- 1 0 1 0.0059 0.0059 -- 0.0059 0.0059 0 1 2.0 2.0 Category 2: QL>ESV
Disulfoton 298-04-4 mg/L -- -- -- -- 1 0 1 0.00094 0.00094 -- 0.00094 0.00094 0 0 -- -- Category 4: No ESV & ND
Ethyl Methanesulfonate 62-50-0 mg/L -- -- -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 -- -- Category 4: No ESV & ND
Famphur 52-85-7 mg/L -- -- -- -- 1 0 1 0.0013 0.0013 -- 0.0013 0.0013 0 0 -- -- Category 4: No ESV & ND
Hexachlorobenzene 118-74-1 mg/L 0.00015 USEPA R4 -- -- 1 0 1 0.00094 0.00094 -- 0.00094 0.00094 0 1 6.3 6.3 Category 2: QL>ESV
Hexachlorobutadiene 87-68-3 mg/L 0.001 USEPA R4 -- -- 1 0 1 0.00073 0.00073 -- 0.00073 0.00073 0 0 0.7 0.7 No COPEC: QL<ESV
Hexachlorocyclopentadiene 77-47-4 mg/L 0.00007 NCDEQ -- -- 1 0 1 0.003 0.003 -- 0.003 0.003 0 1 42.9 42.9 Category 2: QL>ESV
Hexachloroethane 67-72-1 mg/L 0.012 USEPA R4 -- -- 1 0 1 0.0009 0.0009 -- 0.0009 0.0009 0 0 0.1 0.1 No COPEC: QL<ESV
Hexachlorophene 70-30-4 mg/L -- -- -- -- 1 0 1 0.032 0.032 -- 0.032 0.032 0 0 -- -- Category 4: No ESV & ND
Hexachloropropene 1888-71-7 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Isophorone 78-59-1 mg/L 0.92 USEPA R4 -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
Isosafrole 120-58-1 mg/L -- -- -- -- 1 0 1 0.00059 0.00059 -- 0.00059 0.00059 0 0 -- -- Category 4: No ESV & ND
Methapyrilene 91-80-5 mg/L -- -- -- -- 1 0 1 0.0032 0.0032 -- 0.0032 0.0032 0 0 -- -- Category 4: No ESV & ND
3 of 6
Table C-15
Summary Groundwater Screening - Floodplain
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
Methyl Methanesulfonate 66-27-3 mg/L -- -- -- -- 1 0 1 0.00071 0.00071 -- 0.00071 0.00071 0 0 -- -- Category 4: No ESV & ND
N-Nitroso-Di-N-Butylamine 924-16-3 mg/L -- -- -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodi-N-Propylamine 621-64-7 mg/L -- -- -- -- 1 0 1 0.00085 0.00085 -- 0.00085 0.00085 0 0 -- -- Category 4: No ESV & ND
N-Nitrosodiethylamine 55-18-5 mg/L 25 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodimethylamine 62-75-9 mg/L 17 NCDEQ -- -- 1 0 1 0.0033 0.0033 -- 0.0033 0.0033 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosodiphenylamine 86-30-6 mg/L 0.29 NCDEQ -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 0.0 0.0 No COPEC: QL<ESV
N-Nitrosomorpholine 59-89-2 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
N-Nitrosopiperidine 100-75-4 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
N-Nitrosopyrrolidine 930-55-2 mg/L -- -- -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 -- -- Category 4: No ESV & ND
Nitrobenzene 98-95-3 mg/L 4.6 NCDEQ -- -- 1 0 1 0.00087 0.00087 -- 0.00087 0.00087 0 0 0.0 0.0 No COPEC: QL<ESV
Nitrosomethylethylamine 10595-95-6 mg/L -- -- -- -- 1 0 1 0.0039 0.0039 -- 0.0039 0.0039 0 0 -- -- Category 4: No ESV & ND
O-Toluidine 95-53-4 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
O,O,O-Triethyl Phosphorothioate 126-68-1 mg/L -- -- -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 -- -- Category 4: No ESV & ND
P-Dimethylaminoazobenzene 60-11-7 mg/L -- -- -- -- 1 0 1 0.00094 0.00094 -- 0.00094 0.00094 0 0 -- -- Category 4: No ESV & ND
P-Phenylenediamine 106-50-3 mg/L -- -- -- -- 1 0 1 0.012 0.012 -- 0.012 0.012 0 0 -- -- Category 4: No ESV & ND
Parathion, Ethyl 56-38-2 mg/L 0.000013 NCDEQ -- -- 1 0 1 0.0015 0.0015 -- 0.0015 0.0015 0 1 115.4 115.4 Category 2: QL>ESV
Parathion, Methyl 298-00-0 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
Pentachlorobenzene 608-93-5 mg/L 0.00051 NCDEQ -- -- 1 0 1 0.00062 0.00062 -- 0.00062 0.00062 0 1 1.2 1.2 Category 2: QL>ESV
Pentachloronitrobenzene 82-68-8 mg/L -- -- -- -- 1 0 1 0.00092 0.00092 -- 0.00092 0.00092 0 0 -- -- Category 4: No ESV & ND
Pentachlorophenol 87-86-5 mg/L 0.015 USEPA R4 -- -- 1 0 1 0.0024 0.0024 -- 0.0024 0.0024 0 0 0.2 0.2 No COPEC: QL<ESV
Phenacetin 62-44-2 mg/L -- -- -- -- 1 0 1 0.0017 0.0017 -- 0.0017 0.0017 0 0 -- -- Category 4: No ESV & ND
Phenol 108-95-2 mg/L 0.16 USEPA R4 -- -- 1 0 1 0.00098 0.00098 -- 0.00098 0.00098 0 0 0.0 0.0 No COPEC: QL<ESV
Phorate 298-02-2 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
Pronamide 23950-58-5 mg/L -- -- -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 -- -- Category 4: No ESV & ND
Pyridine 110-86-1 mg/L 5 NCDEQ -- -- 1 0 1 0.0027 0.0027 -- 0.0027 0.0027 0 0 0.0 0.0 No COPEC: QL<ESV
Safrole 94-59-7 mg/L -- -- -- -- 1 0 1 0.00095 0.00095 -- 0.00095 0.00095 0 0 -- -- Category 4: No ESV & ND
Thiodiphosphoric Acid Tetraethyl Ester 3689-24-5 mg/L -- -- -- -- 1 0 1 0.00063 0.00063 -- 0.00063 0.00063 0 0 -- -- Category 4: No ESV & ND
Zinophos 297-97-2 mg/L -- -- -- -- 1 0 1 0.0011 0.0011 -- 0.0011 0.0011 0 0 -- -- Category 4: No ESV & ND
Volatile Organic Compounds (VOCs)
1,1-Dichloroethane 75-34-3 mg/L 0.41 USEPA R4 -- -- 1 0 1 0.00025 0.00025 -- 0.00025 0.00025 0 0 0.0 0.0 No COPEC: QL<ESV
1,1-Dichloroethene 75-35-4 mg/L 0.13 USEPA R4 -- -- 1 0 1 0.00011 0.00011 -- 0.00011 0.00011 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1-Trichloroethane 71-55-6 mg/L 2.5 NCDEQ -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,1,2-Tetrachloroethane 630-20-6 mg/L 0.085 USEPA R4 -- -- 1 0 1 0.00033 0.00033 -- 0.00033 0.00033 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2-Trichloroethane 79-00-5 mg/L 2.3 NCDEQ -- -- 1 0 1 0.00013 0.00013 -- 0.00013 0.00013 0 0 0.0 0.0 No COPEC: QL<ESV
1,1,2,2-Tetrachloroethane 79-34-5 mg/L 0.2 USEPA R4 -- -- 1 0 1 0.00018 0.00018 -- 0.00018 0.00018 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloroethane 107-06-2 mg/L 2 USEPA R4 -- -- 1 0 1 0.0001 0.0001 -- 0.0001 0.0001 0 0 0.0 0.0 No COPEC: QL<ESV
1,2-Dichloropropane 78-87-5 mg/L 0.52 USEPA R4 -- -- 1 0 1 0.00013 0.00013 -- 0.00013 0.00013 0 0 0.0 0.0 No COPEC: QL<ESV
2-Chloro-1,3-Butadiene 126-99-8 mg/L -- -- -- -- 1 0 1 0.0003 0.0003 -- 0.0003 0.0003 0 0 -- -- Category 4: No ESV & ND
2-Hexanone 591-78-6 mg/L 0.099 USEPA R4 -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.0 0.0 No COPEC: QL<ESV
Acetone 67-64-1 mg/L 2 NCDEQ -- -- 1 0 1 0.005 0.005 -- 0.005 0.005 0 0 0.0 0.0 No COPEC: QL<ESV
4 of 6
Table C-15
Summary Groundwater Screening - Floodplain
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
Acetonitrile 75-05-8 mg/L 12 USEPA R4 -- -- 1 0 1 0.01 0.01 -- 0.01 0.01 0 0 0.0 0.0 No COPEC: QL<ESV
Acrolein 107-02-8 mg/L 0.003 USEPA R4 -- -- 1 0 1 0.0074 0.0074 -- 0.0074 0.0074 0 1 2.5 2.5 Category 2: QL>ESV
Acrylonitrile 107-13-1 mg/L 0.42 NCDEQ -- -- 1 0 1 0.0072 0.0072 -- 0.0072 0.0072 0 0 0.0 0.0 No COPEC: QL<ESV
Allyl Chloride (3-Chloropropene) 107-05-1 mg/L -- -- -- -- 1 0 1 0.0002 0.0002 -- 0.0002 0.0002 0 0 -- -- Category 4: No ESV & ND
Benzene 71-43-2 mg/L 0.16 USEPA R4 -- -- 1 0 1 0.00025 0.00025 -- 0.00025 0.00025 0 0 0.0 0.0 No COPEC: QL<ESV
Bromodichloromethane 75-27-4 mg/L 0.34 USEPA R4 -- -- 1 0 1 0.00025 0.00025 -- 0.00025 0.00025 0 0 0.0 0.0 No COPEC: QL<ESV
Bromoform 75-25-2 mg/L 0.23 USEPA R4 -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 0.0 0.0 No COPEC: QL<ESV
Bromomethane 74-83-9 mg/L 0.00004 NCDEQ -- -- 1 0 1 0.0008 0.0008 -- 0.0008 0.0008 0 1 20.0 20.0 Category 2: QL>ESV
Carbon Disulfide 75-15-0 mg/L 0.1 NCDEQ -- -- 1 0 1 0.0006 0.0006 -- 0.0006 0.0006 0 0 0.0 0.0 No COPEC: QL<ESV
Carbon Tetrachloride 56-23-5 mg/L 0.077 USEPA R4 -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 0.0 0.0 No COPEC: QL<ESV
Chlorobenzene 108-90-7 mg/L 0.14 NCDEQ -- -- 1 0 1 0.00025 0.00025 -- 0.00025 0.00025 0 0 0.0 0.0 No COPEC: QL<ESV
Chloroethane 75-00-3 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
Chloroform 67-66-3 mg/L 0.14 USEPA R4 0.00018 0.00018 1 1 0 0.00014 0.00014 ABL-MW005 0.00018 0.00018 0 0 0.0 0.0 No COPEC: EPC<ESV
Chloromethane 74-87-3 mg/L -- -- -- -- 1 0 1 0.00033 0.00033 -- 0.00033 0.00033 0 0 -- -- Category 4: No ESV & ND
cis-1,3-Dichloropropene 10061-01-5 mg/L 0.0017 USEPA R4 -- -- 1 0 1 0.00011 0.00011 -- 0.00011 0.00011 0 0 0.1 0.1 No COPEC: QL<ESV
Dibromochloromethane 124-48-1 mg/L 0.32 USEPA R4 -- -- 1 0 1 0.0001 0.0001 -- 0.0001 0.0001 0 0 0.0 0.0 No COPEC: QL<ESV
Dibromomethane 74-95-3 mg/L -- -- -- -- 1 0 1 0.0002 0.0002 -- 0.0002 0.0002 0 0 -- -- Category 4: No ESV & ND
Dichlorodifluoromethane 75-71-8 mg/L -- -- -- -- 1 0 1 0.00025 0.00025 -- 0.00025 0.00025 0 0 -- -- Category 4: No ESV & ND
Ethyl Methacrylate 97-63-2 mg/L -- -- -- -- 1 0 1 0.00025 0.00025 -- 0.00025 0.00025 0 0 -- -- Category 4: No ESV & ND
Ethylbenzene 100-41-4 mg/L 0.097 NCDEQ -- -- 1 0 1 0.00011 0.00011 -- 0.00011 0.00011 0 0 0.0 0.0 No COPEC: QL<ESV
Iodomethane (Methyl Iodide) 74-88-4 mg/L -- -- -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 -- -- Category 4: No ESV & ND
Isobutanol 78-83-1 mg/L -- -- -- -- 1 0 1 0.011 0.011 -- 0.011 0.011 0 0 -- -- Category 4: No ESV & ND
Methyl Ethyl Ketone 78-93-3 mg/L 26 NCDEQ -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Isobutyl Ketone 108-10-1 mg/L 26 NCDEQ -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.0 0.0 No COPEC: QL<ESV
Methyl Methacrylate 80-62-6 mg/L 9.6 NCDEQ -- -- 1 0 1 0.00048 0.00048 -- 0.00048 0.00048 0 0 0.0 0.0 No COPEC: QL<ESV
Methylacrylonitrile 126-98-7 mg/L -- -- -- -- 1 0 1 0.0033 0.0033 -- 0.0033 0.0033 0 0 -- -- Category 4: No ESV & ND
Methylene Chloride 75-09-2 mg/L 11 NCDEQ -- -- 1 0 1 0.001 0.001 -- 0.001 0.001 0 0 0.0 0.0 No COPEC: QL<ESV
Pentachloroethane 76-01-7 mg/L -- -- -- -- 1 0 1 0.0012 0.0012 -- 0.0012 0.0012 0 0 -- -- Category 4: No ESV & ND
Propane Nitrile (Propionitrile) 107-12-0 mg/L -- -- -- -- 1 0 1 0.0046 0.0046 -- 0.0046 0.0046 0 0 -- -- Category 4: No ESV & ND
Styrene 100-42-5 mg/L 0.032 USEPA R4 -- -- 1 0 1 0.00011 0.00011 -- 0.00011 0.00011 0 0 0.0 0.0 No COPEC: QL<ESV
Tetrachloroethylene 127-18-4 mg/L 0.053 USEPA R4 -- -- 1 0 1 0.00015 0.00015 -- 0.00015 0.00015 0 0 0.0 0.0 No COPEC: QL<ESV
Toluene 108-88-3 mg/L 0.011 NCDEQ -- -- 1 0 1 0.00033 0.00033 -- 0.00033 0.00033 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,2-Dichloroethene 156-60-5 mg/L 0.558 USEPA R4 -- -- 1 0 1 0.0002 0.0002 -- 0.0002 0.0002 0 0 0.0 0.0 No COPEC: QL<ESV
trans-1,3-Dichloropropene 10061-02-6 mg/L 0.0017 USEPA R4 -- -- 1 0 1 0.00021 0.00021 -- 0.00021 0.00021 0 0 0.1 0.1 No COPEC: QL<ESV
trans-1,4-Dichloro-2-Butene 110-57-6 mg/L -- -- -- -- 1 0 1 0.0005 0.0005 -- 0.0005 0.0005 0 0 -- -- Category 4: No ESV & ND
Trichloroethylene 79-01-6 mg/L 0.22 USEPA R4 -- -- 1 0 1 0.00013 0.00013 -- 0.00013 0.00013 0 0 0.0 0.0 No COPEC: QL<ESV
Trichlorofluoromethane 75-69-4 mg/L -- -- -- -- 1 0 1 0.00025 0.00025 -- 0.00025 0.00025 0 0 -- -- Category 4: No ESV & ND
Vinyl Acetate 108-05-4 mg/L 0.016 USEPA R4 -- -- 1 0 1 0.00028 0.00028 -- 0.00028 0.00028 0 0 0.0 0.0 No COPEC: QL<ESV
Vinyl Chloride 75-01-4 mg/L 0.93 USEPA R4 -- -- 1 0 1 0.00018 0.00018 -- 0.00018 0.00018 0 0 0.0 0.0 No COPEC: QL<ESV
Xylenes 1330-20-7 mg/L 0.67 NCDEQ -- -- 1 0 1 0.0002 0.0002 -- 0.0002 0.0002 0 0 0.0 0.0 No COPEC: QL<ESV
5 of 6
Table C-15
Summary Groundwater Screening - Floodplain
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max* Min*
Total
Samples Detects Non-
Detects Min Max
Max Detect or
QL*
Mean
ND=QL*ND=0* ND=QL* Max
Mean
NDQL
UnitsChemical Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening
Level
Detected
Concentrations Sample Count Quantitation Limits Location of
Max
Values for Screening
General Chemistry
Total Carbon 7440-44-0 mg/L -- -- 1.1 0.51 9 6 3 0.5 0.5 ABL-MW005 1.1 0.654444444 0 0 -- -- Category 3: No ESV & Detect
Notes
The groundwater screening levels presented above were compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters and USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Table 1a through Table 1e.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
USEPA Region 4 Chronic Freshwater Screening Levels were selected for compounds without a Freshwater Chronic Standard or Freshwater In-Stream Target Value. PAHs screening levels were selected from Table 1e of the USEPA Region 4 guidance.
Screening levels are normalized for hardness where applicable using the NC 15A NCAC 02B conversion formulas.
Little Mountain Creek screening levels were normalized using the geometric mean of samples collected in 2020 (97 mg/L CaCO3). Eastern Drainage Ditch screening levels were normalized using geometric mean of samples collected in 2020 (48 mg/L CaCO3).
* - For summed PCB or PAHs refer to CAS number to determine how non-detect values are represented in this column.
-- - No information is available for this field.
Max Detect or QL - maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
% - Percent
CAS RN - Chemical Abstracts Service Registry Number
EPA R4 - United States Environmental Protection Agency Region 4
HMW - High molecular weight
LMW - Low molecular weight
LOD - Limit of detection (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
ND=0 - Non-detect values presented as 0
ND=LOD - Non-detect values presented at the limit of detection (LOD)
ND=QL - Non-detect values presented at the quantitation limit
ND=QL/2 - Non-detects presented at one half of the quantitation limit
PAH - Polycyclic aromatic hydrocarbon
PCB - Polychlorinated biphenyl
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
SVOC - Semi-volatile organic compound
VOC - Volatile organic compound
References
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
USEPA. 2018. Region 4 Ecological Risk Assessment Supplemental Guidance. EPA Region 4, Scientific Support Section - Superfund Division. Updated March 2018.
6 of 6
Table C-16
Summary Wet Well Screening - Wet Well
Baseline Ecological Risk Assessment Work Plan
Badin Business Park - Badin, North Carolina
Alcoa Corporation
Value Source Max Min
Total
Samples Detects Non-
Detects Min Max
Max Detect
or QL Mean ND=QL ND=0 ND=QL Max
Mean
NDQL
Inorganics
Fluoride 16984-48-8 mg/L 1.8 NCDEQ 26 12 4 4 0 0.34 0.68 ABL-WW 26 18.575 4 4 14.44 10.3 Category 1/5: Max EPC>ESV
Notes
The wet well screening level presented above was compiled from the North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters.
NC 02B Chronic Freshwater Standards for Class C waters were selected as the screening level where available. The NC 02B Chronic Freshwater In-Stream Target Values were selected for compounds without Chronic Freshwater Standards.
-- - No information is available for this field.
Max Detect or QL is the maximum detected result or maximum quantitation limit if there are no detected results.
Hazard Quotient - Max detect or QL value divided by the screening level.
Mean ND=QL - mean of detected and non-detected results with non-detected results set as the quantitation limit.
Mean ND=QL Hazard Quotient - Mean ND=QL value divided by the screening level.
CAS RN - Chemical Abstracts Service Registry Number
Max - Maximum
mg/L - Milligram per liter
Min - Minimum
NC - North Carolina
NCDEQ - North Carolina Department of Environmental Quality
QL - Quantitation limit (Lowest reported detection, reporting, or quantitation limit provided by the laboratory for a given sample)
References:
NC DEQ. 2021. North Carolina Division of Water Resources Surface Water Quality Standards, Criteria, & In-Stream Target Values.
UnitsChemical
Name CAS RN
Number of
Exceedances Hazard Quotients
COPEC Selection
Ecological Screening Level Detected
Concentrations Sample Count Quantitation
Limits Location of
Max
Values for Screening
1 of 1
Baseline Ecological Risk Assessment Work Plan, Badin Business Park
Appendix D Site-Specific Toxicity Testing
EHS Support LLC
Appendix D Site-Specific Toxicity Testing
Introduction
This appendix provides a summary of the results of supplemental toxicity testing program conducted at
the Alcoa/Badin Landfill (ABL) in October 2022. This focused assessment was conducted in support of
the Baseline Ecological Risk Assessment (BERA) Work Plan. The goals of the study were to assess
whether historical landfill impacted groundwater could result in unacceptable chronic effects to aquatic
receptors in downgradient waters of Little Mountain Creek and to determine if direct measurements of
aquatic toxicity would be warranted as part of the BERA process for the ABL.
Chronic toxicity testing was conducted using North Carolina whole effluent toxicity (WET) testing
procedures. Three dilution waters were evaluated including: a standard laboratory dilution water -
moderately hard synthetic water (MHSW), Little Mountain Creek water collected upstream of the BERA
Study Area, and Water from the Unnamed Tributary. The WET test evaluated 7-day chronic reproductive
effects in Ceriodaphnia dubia, a sensitive organism that is commonly used in aquatic toxicity testing. The
ABL Wet Well was identified as a suitable water source to use as a proxy for historical landfill impacted
groundwater because it receives water from collection trench infrastructure and provides an integrated
signature of landfill water. Currently, the water captured by collection trench infrastructure is routed via
a force main to a sewage treatment facility.
The specific objectives of the study were to:
• Develop an understanding of the range of concentrations at which water collected from the ABL
Wet Well could lead to chronic effects in aquatic receptors.
• Assess whether C. dubia chronic reproductive effects differ between the MHSW, Little Mountain
Creek, and Unnamed Tributary dilution waters.
• Evaluate the need for additional TRIAD investigations on the basis of the mitigated groundwater
to surface water exposure pathway to understand the potential for chronic effects in Little
Mountain Creek or other surface water bodies associated with the ABL.
Methods
Water was collected from the ABL Wet Well, Little Mountain Creek upgradient of the ABL BERA Study
Area, and an Unnamed Tributary to Little Mountain Creek which is situated just downstream of State
Highway 740. Chemical analyses were conducted to determine the concentration of fluoride, cyanide,
metals, and other water quality parameters including pH, alkalinity, hardness, and chloride. Samples
from the ABL wet well were tested to determine the potential for chronic reproductive effects in C.
dubia when diluted in standard North Carolina test water (MHSW), water collected from Little Mountain
Creek upgradient from the site, and water collected from the Unnamed Tributary. WET tests were
conducted in accordance with the North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure, Version 3.0 (NCDENR, 2010).
WET test results were evaluated to determine the no observed effects concentration (NOEC), the lowest
observed effects concentration (LOEC), and the inhibitory concentration at which there was a 25%
reduction in reproduction (IC25). These effects endpoints were compared across different types of
Baseline Ecological Risk Assessment Work Plan, Badin Business Park
Appendix D Site-Specific Toxicity Testing
EHS Support LLC
dilution water to determine whether toxicity modifying factors (TMFs) in on-site waters reduced chronic
effects in C. dubia.
Key Findings
• The IC25 for a 7-day chronic C. dubia neonate reproduction WET test occurred at 53.8 percent
Wet Well water when diluted with Little Mountain Creek water. This indicates that a 1-to-1
dilution of ABL water with Little Mountain Creek water would prevent unacceptable chronic
effects to C. dubia.
• The concentration of fluoride in the ABL Wet Well during sampling was 20-22 mg/L. Therefore,
based on the site-specific conditions evaluated, fluoride concentrations that correspond to C.
dubia chronic effects were between 10.8 and 11.8 mg/L.
• Concentrations of fluoride in the WET test corresponding to an observed chronic effect are an
order of magnitude greater than the promulgated 15 NCAC 02B Surface Water Guidelines for
fluoride.
• WET test controls containing 100 percent Little Mountain Creek water and 100 percent
Unnamed Tributary water had greater neonate reproduction rates than organisms tested in
standard laboratory synthetic water, demonstrating the lack of chronic effects in these water
bodies.
• Results of chronic toxicity testing provide support that additional TRIAD testing in Little
Mountain Creek to assess fluoride ecotoxicity is not warranted.
• Further refinement of the fluoride ESV in the BERA is proposed.
Results of Chemical and WET Testing
ABL WET Test Results
Neonate reproduction rates by WET test treatment (percent ABL Wet Well water) for Little Mountain
Creek are illustrated in Figure D-1. The NOEC for the reproduction endpoint for the ABL Wet Well water
diluted with water from Little Mountain Creek was 45 percent (Figure D-1). The LOEC or the percent
effluent dilution at which the number of young produced per organism was significantly lower than the
control was 90 percent. The IC25 was 53.8 percent Wet Well water when diluted with water from Little
Mountain Creek.
The effects concentrations for ABL Wet Well water diluted with other water sources are provided in
Table D-1. NOECs and LOECs were the same for Little Mountain Creek and MHSW dilution waters. The
Unnamed Tributary dilution water source had a NOEC and LOEC of 23 and 45 percent ABL Wet Well
water, respectively. The IC25 was lowest in the Unnamed Tributary at 44.8 percent Wet Well water
followed the MHSQ at 49.3 percent dilution. (Table D-1). A detailed summary of WET test results is
provided in Table D-2.
Baseline Ecological Risk Assessment Work Plan, Badin Business Park
Appendix D Site-Specific Toxicity Testing
EHS Support LLC

Figure D-1 Chronic Effects of Water from the ABL Wet Well Diluted with Water from Little
Mountain Creek on C. dubia Reproduction
Table D-1 WET Test Effects Concentrations in On-Site and Standard Laboratory Water
Diluent NOEC (%) LOEC (%) IC25 (%)
Unnamed Tributary 23 45 44.8
Little Mountain Creek 45 90 53.8
Moderately Hard Synthetic Water 45 90 49.3
Notes:
NOEC: No Observed Effects Concentration
LOEC: Lowest Observed Effects Concentration IC25: Concentration at which a 25 percent reduction in number of young produced per organism would occur
ChV: Chronic Value
Comparison of Control Reproduction Across Sources
C. dubia reproductive rates were also compared across the controls of the tests where test water was
100 percent water from Little Mountain Creek, Unnamed Tributary, or MHSW. Reproductive rates in
MHSW were not normally distributed (Shapiro-Wilk p=0.003), so rates were compared using a Wilcoxon
rank-sum test to determine whether the median number of young per organism differed among
treatments. The median reproductive rate was not significantly different between Little Mountain Creek
and the Unnamed Tributary (p=0.2) but was significantly lower in MHSW than in Little Mountain Creek
(p<0.001) and in MHSW than in the Unnamed Tributary (p=0.002).
Baseline Ecological Risk Assessment Work Plan, Badin Business Park
Appendix D Site-Specific Toxicity Testing
EHS Support LLC
These findings indicate that the Site water from Little Mountain Creek and the Unnamed Tributary are
more favorable for C. dubia reproduction than the standard test water used in the laboratory (MHSW).
This could be attributed to the presence of toxicity modifying factors (TMFs) that help ameliorate or
reduce the toxicity of the Wet Well water or other water quality characteristics of the Site-specific water
that promote the health of the test organism.

Figure D-2 Ceriodaphnia dubia Reproduction in North Carolina Control Water (MHSW), Water
from Little Mountain Creek, and Water from Unnamed Tributary
Chemical Analysis
Chemical analyses for the ABL Wet Well, Unnamed Tributary, and Little Mountain Creek are presented
in Table D-3. Concentrations were generally similar between the sampling events on October 11 and
October 13, 2022. Fluoride concentrations were 20 to 22 mg/L in the ABL wet well, 2 to 2.4 mg/L in UNT,
and 0.14 to 0.24 mg/L in Little Mountain Creek. Available cyanide was detected only in the ABL Wet
Well, with 0.011 mg/L cyanide on October 11 and 0.003 mg/L cyanide on October 13. Metals were
present at concentrations above the detection limit in at least one sample were aluminum, arsenic,
nickel, copper, and selenium.
Alkalinity was 34 to 40 mg CaCO3/L in Unnamed Tributary and Little Mountain Creek. The ABL Wet Well
had an alkalinity of 890 to 910 mg CaCO3/L. Chloride concentrations were 4.2 to 4.3 mg/L in the
Unnamed Tributary, 6.2 mg/L in Little Mountain Creek, and 20 mg/L in the ABL Wet Well. Calculated
hardness (2.497 * Calcium + 4.118 * Magnesium) was 34.8 to 37.8 mg CaCO3/L in Little Mountain Creek,
61.0 mg CaCO3/L in Unnamed Tributary, and 181.8 to 184.3 mg CaCO3/L in the ABL wet well. Ranges of
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pH was 7.5 to 7.8 in Unnamed Tributary and Little Mountain Creek as well as 8.0 to 8.1 in the ABL Wet
Well.
Conclusions
Results of WET testing in the ABL indicate no chronic effects with approximately 1 to 1 or greater
dilution of water from the ABL Wet Well. The concentration at which there was a 25 percent reduction
in reproduction ranged from 44.8 percent water from the Wet Well to 53.8 percent water from the Wet
Well when mixed with Unnamed Tributary and Little Mountain Creek dilution water sources,
respectively.
Control reproduction was significantly greater in water collected on Site (from both Unnamed Tributary
and Little Mountain Creek) than in standard laboratory test water, indicating that under current
conditions there are no chronic effects in either of these water features.
Based on the concentrations of fluoride observed in the ABL Wet Well, the fluoride concentrations that
correspond to the observed C. dubia chronic effects were between 10.8 and 11.8 mg/L. Concentrations
of fluoride corresponding to observed effects are an order of magnitude higher than the promulgated
15 NCAC 02B Surface Water Guidelines of 1.8 mg/L fluoride.
Significant attenuation of upgradient groundwater is occurring prior to and within Little Mountain Creek.
This is supported by the absence of concentrations of fluoride in Little Mountain Creek above any
15 NCAC 02B Surface Water Guidelines. In fact, concentrations of fluoride within Little Mountain Creek
are approximately two orders of magnitude lower than the ABL Wet Well. At this level of anticipated
attenuation, no unacceptable chronic conditions are anticipated for C. dubia.
These results demonstrate the lack of unacceptable ecological risk to aquatic receptors given current
conditions in the ABL. Based on these results, additional TRIAD investigation is not warranted, as no
chronic toxicity is expected based on the observed chronic effects values and current site conditions.
Additional refinement of the fluoride ESV is recommended.
References
NCDENR, 2010. North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure, Version 3.0.
December.
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Table D-2 Results of WET Testing
Diluent Treatment Organism Number Number of Young
Little Mountain Creek Control 1 37
Little Mountain Creek Control 2 36
Little Mountain Creek Control 3 36
Little Mountain Creek Control 4 34
Little Mountain Creek Control 5 34
Little Mountain Creek Control 6 34
Little Mountain Creek Control 7 33
Little Mountain Creek Control 8 35
Little Mountain Creek Control 9 31
Little Mountain Creek Control 10 35
Little Mountain Creek Control 11 31
Little Mountain Creek Control 12 36
Little Mountain Creek Control 13 33
Little Mountain Creek Control 14 36
Little Mountain Creek Control 15 36
Little Mountain Creek Control 16 36
Little Mountain Creek Control 17 35
Little Mountain Creek Control 18 32
Little Mountain Creek Control 19 33
Little Mountain Creek Control 20 34
Little Mountain Creek Effluent Percentage 6.0% 1 38
Little Mountain Creek Effluent Percentage 6.0% 2 37
Little Mountain Creek Effluent Percentage 6.0% 3 34
Little Mountain Creek Effluent Percentage 6.0% 4 34
Little Mountain Creek Effluent Percentage 6.0% 5 38
Little Mountain Creek Effluent Percentage 6.0% 6 36
Little Mountain Creek Effluent Percentage 6.0% 7 38
Little Mountain Creek Effluent Percentage 6.0% 8 36
Little Mountain Creek Effluent Percentage 6.0% 9 31
Little Mountain Creek Effluent Percentage 6.0% 10 38
Little Mountain Creek Effluent Percentage 12% 1 33
Little Mountain Creek Effluent Percentage 12% 2 31
Little Mountain Creek Effluent Percentage 12% 3 34
Little Mountain Creek Effluent Percentage 12% 4 37
Little Mountain Creek Effluent Percentage 12% 5 31
Little Mountain Creek Effluent Percentage 12% 6 34
Little Mountain Creek Effluent Percentage 12% 7 35
Little Mountain Creek Effluent Percentage 12% 8 35
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Diluent Treatment Organism Number Number of Young
Little Mountain Creek Effluent Percentage 12% 9 34
Little Mountain Creek Effluent Percentage 12% 10 36
Little Mountain Creek Effluent Percentage 23% 1 37
Little Mountain Creek Effluent Percentage 23% 2 35
Little Mountain Creek Effluent Percentage 23% 3 32
Little Mountain Creek Effluent Percentage 23% 4 33
Little Mountain Creek Effluent Percentage 23% 5 35
Little Mountain Creek Effluent Percentage 23% 6 30
Little Mountain Creek Effluent Percentage 23% 7 33
Little Mountain Creek Effluent Percentage 23% 8 35
Little Mountain Creek Effluent Percentage 23% 9 38
Little Mountain Creek Effluent Percentage 23% 10 31
Little Mountain Creek Effluent Percentage 45% 1 32
Little Mountain Creek Effluent Percentage 45% 2 30
Little Mountain Creek Effluent Percentage 45% 3 31
Little Mountain Creek Effluent Percentage 45% 4 34
Little Mountain Creek Effluent Percentage 45% 5 37
Little Mountain Creek Effluent Percentage 45% 6 33
Little Mountain Creek Effluent Percentage 45% 7 30
Little Mountain Creek Effluent Percentage 45% 8 35
Little Mountain Creek Effluent Percentage 45% 9 33
Little Mountain Creek Effluent Percentage 45% 10 27
Little Mountain Creek Effluent Percentage 90% 1 0
Little Mountain Creek Effluent Percentage 90% 2 1
Little Mountain Creek Effluent Percentage 90% 3 0
Little Mountain Creek Effluent Percentage 90% 4 0
Little Mountain Creek Effluent Percentage 90% 5 2
Little Mountain Creek Effluent Percentage 90% 6 4
Little Mountain Creek Effluent Percentage 90% 7 8
Little Mountain Creek Effluent Percentage 90% 8 4
Little Mountain Creek Effluent Percentage 90% 9 0
Little Mountain Creek Effluent Percentage 90% 10 2
Moderately Hard Synthetic Water Control 1 30
Moderately Hard Synthetic Water Control 2 29
Moderately Hard Synthetic Water Control 3 30
Moderately Hard Synthetic Water Control 4 31
Moderately Hard Synthetic Water Control 5 30
Moderately Hard Synthetic Water Control 6 33
Moderately Hard Synthetic Water Control 7 32
Moderately Hard Synthetic Water Control 8 30
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Diluent Treatment Organism Number Number of Young
Moderately Hard Synthetic Water Control 9 34
Moderately Hard Synthetic Water Control 10 29
Moderately Hard Synthetic Water Control 11 35
Moderately Hard Synthetic Water Control 12 30
Moderately Hard Synthetic Water Control 13 30
Moderately Hard Synthetic Water Control 14 32
Moderately Hard Synthetic Water Control 15 35
Moderately Hard Synthetic Water Control 16 31
Moderately Hard Synthetic Water Control 17 29
Moderately Hard Synthetic Water Control 18 30
Moderately Hard Synthetic Water Control 19 31
Moderately Hard Synthetic Water Control 20 30
Moderately Hard Synthetic Water Effluent Percentage 6.0% 1 34
Moderately Hard Synthetic Water Effluent Percentage 6.0% 2 38
Moderately Hard Synthetic Water Effluent Percentage 6.0% 3 37
Moderately Hard Synthetic Water Effluent Percentage 6.0% 4 34
Moderately Hard Synthetic Water Effluent Percentage 6.0% 5 34
Moderately Hard Synthetic Water Effluent Percentage 6.0% 6 34
Moderately Hard Synthetic Water Effluent Percentage 6.0% 7 39
Moderately Hard Synthetic Water Effluent Percentage 6.0% 8 38
Moderately Hard Synthetic Water Effluent Percentage 6.0% 9 36
Moderately Hard Synthetic Water Effluent Percentage 6.0% 10 32
Moderately Hard Synthetic Water Effluent Percentage 12% 1 36
Moderately Hard Synthetic Water Effluent Percentage 12% 2 35
Moderately Hard Synthetic Water Effluent Percentage 12% 3 36
Moderately Hard Synthetic Water Effluent Percentage 12% 4 30
Moderately Hard Synthetic Water Effluent Percentage 12% 5 35
Moderately Hard Synthetic Water Effluent Percentage 12% 6 36
Moderately Hard Synthetic Water Effluent Percentage 12% 7 36
Moderately Hard Synthetic Water Effluent Percentage 12% 8 32
Moderately Hard Synthetic Water Effluent Percentage 12% 9 36
Moderately Hard Synthetic Water Effluent Percentage 12% 10 34
Moderately Hard Synthetic Water Effluent Percentage 23% 1 34
Moderately Hard Synthetic Water Effluent Percentage 23% 2 34
Moderately Hard Synthetic Water Effluent Percentage 23% 3 31
Moderately Hard Synthetic Water Effluent Percentage 23% 4 38
Moderately Hard Synthetic Water Effluent Percentage 23% 5 32
Moderately Hard Synthetic Water Effluent Percentage 23% 6 32
Moderately Hard Synthetic Water Effluent Percentage 23% 7 33
Moderately Hard Synthetic Water Effluent Percentage 23% 8 30
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Diluent Treatment Organism Number Number of Young
Moderately Hard Synthetic Water Effluent Percentage 23% 9 34
Moderately Hard Synthetic Water Effluent Percentage 23% 10 35
Moderately Hard Synthetic Water Effluent Percentage 45% 1 28
Moderately Hard Synthetic Water Effluent Percentage 45% 2 26
Moderately Hard Synthetic Water Effluent Percentage 45% 3 31
Moderately Hard Synthetic Water Effluent Percentage 45% 4 27
Moderately Hard Synthetic Water Effluent Percentage 45% 5 32
Moderately Hard Synthetic Water Effluent Percentage 45% 6 30
Moderately Hard Synthetic Water Effluent Percentage 45% 7 21
Moderately Hard Synthetic Water Effluent Percentage 45% 8 24
Moderately Hard Synthetic Water Effluent Percentage 45% 9 28
Moderately Hard Synthetic Water Effluent Percentage 45% 10 31
Moderately Hard Synthetic Water Effluent Percentage 90% 1 0
Moderately Hard Synthetic Water Effluent Percentage 90% 2 5
Moderately Hard Synthetic Water Effluent Percentage 90% 3 0
Moderately Hard Synthetic Water Effluent Percentage 90% 4 0
Moderately Hard Synthetic Water Effluent Percentage 90% 5 6
Moderately Hard Synthetic Water Effluent Percentage 90% 6 0
Moderately Hard Synthetic Water Effluent Percentage 90% 7 0
Moderately Hard Synthetic Water Effluent Percentage 90% 8 5
Moderately Hard Synthetic Water Effluent Percentage 90% 9 4
Moderately Hard Synthetic Water Effluent Percentage 90% 10 4
Unnamed Tributary Control 1 32
Unnamed Tributary Control 2 33
Unnamed Tributary Control 3 35
Unnamed Tributary Control 4 34
Unnamed Tributary Control 5 32
Unnamed Tributary Control 6 34
Unnamed Tributary Control 7 34
Unnamed Tributary Control 8 29
Unnamed Tributary Control 9 34
Unnamed Tributary Control 10 34
Unnamed Tributary Control 11 37
Unnamed Tributary Control 12 35
Unnamed Tributary Control 13 34
Unnamed Tributary Control 14 30
Unnamed Tributary Control 15 30
Unnamed Tributary Control 16 31
Unnamed Tributary Control 17 38
Unnamed Tributary Control 18 34
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Diluent Treatment Organism Number Number of Young
Unnamed Tributary Control 19 34
Unnamed Tributary Control 20 36
Unnamed Tributary Effluent Percentage 6.0% 1 33
Unnamed Tributary Effluent Percentage 6.0% 2 32
Unnamed Tributary Effluent Percentage 6.0% 3 36
Unnamed Tributary Effluent Percentage 6.0% 4 34
Unnamed Tributary Effluent Percentage 6.0% 5 35
Unnamed Tributary Effluent Percentage 6.0% 6 35
Unnamed Tributary Effluent Percentage 6.0% 7 34
Unnamed Tributary Effluent Percentage 6.0% 8 34
Unnamed Tributary Effluent Percentage 6.0% 9 36
Unnamed Tributary Effluent Percentage 6.0% 10 39
Unnamed Tributary Effluent Percentage 12% 1 34
Unnamed Tributary Effluent Percentage 12% 2 32
Unnamed Tributary Effluent Percentage 12% 3 35
Unnamed Tributary Effluent Percentage 12% 4 38
Unnamed Tributary Effluent Percentage 12% 5 34
Unnamed Tributary Effluent Percentage 12% 6 36
Unnamed Tributary Effluent Percentage 12% 7 36
Unnamed Tributary Effluent Percentage 12% 8 37
Unnamed Tributary Effluent Percentage 12% 9 35
Unnamed Tributary Effluent Percentage 12% 10 31
Unnamed Tributary Effluent Percentage 23% 1 37
Unnamed Tributary Effluent Percentage 23% 2 30
Unnamed Tributary Effluent Percentage 23% 3 33
Unnamed Tributary Effluent Percentage 23% 4 33
Unnamed Tributary Effluent Percentage 23% 5 33
Unnamed Tributary Effluent Percentage 23% 6 37
Unnamed Tributary Effluent Percentage 23% 7 32
Unnamed Tributary Effluent Percentage 23% 8 31
Unnamed Tributary Effluent Percentage 23% 9 34
Unnamed Tributary Effluent Percentage 23% 10 29
Unnamed Tributary Effluent Percentage 45% 1 28
Unnamed Tributary Effluent Percentage 45% 2 24
Unnamed Tributary Effluent Percentage 45% 3 30
Unnamed Tributary Effluent Percentage 45% 4 12
Unnamed Tributary Effluent Percentage 45% 5 32
Unnamed Tributary Effluent Percentage 45% 6 14
Unnamed Tributary Effluent Percentage 45% 7 33
Unnamed Tributary Effluent Percentage 45% 8 29
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Diluent Treatment Organism Number Number of Young
Unnamed Tributary Effluent Percentage 45% 9 24
Unnamed Tributary Effluent Percentage 45% 10 32
Unnamed Tributary Effluent Percentage 90% 1 0
Unnamed Tributary Effluent Percentage 90% 2 2
Unnamed Tributary Effluent Percentage 90% 3 5
Unnamed Tributary Effluent Percentage 90% 4 0
Unnamed Tributary Effluent Percentage 90% 5 10
Unnamed Tributary Effluent Percentage 90% 6 4
Unnamed Tributary Effluent Percentage 90% 7 12
Unnamed Tributary Effluent Percentage 90% 8 4
Unnamed Tributary Effluent Percentage 90% 9 6
Unnamed Tributary Effluent Percentage 90% 10 8

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Appendix D Site-Specific Toxicity Testing

Table D-3 Results of Chemical Analyses
Fraction Analyte Unit ABL Wet Well Unnamed Tributary Little Mountain Creek
10/11/2022 10/13/2022 10/11/2022 10/13/2022 10/11/2022 10/13/2022
D Aluminum mg/L 0.049 J 0.053 J <0.035 <0.035 <0.035 <0.035
D Arsenic mg/L 0.0011 J <0.00086 <0.00086 <0.00086 <0.00086 <0.00086
D Beryllium mg/L <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002
D Cadmium mg/L <0.000078 <0.000078 <0.000078 <0.000078 <0.000078 <0.000078
D Calcium mg/L 54 53 17 17 8 8.7
D Chromium mg/L <0.0026 <0.0026 <0.0026 <0.0026 <0.0026 <0.0026
D Copper mg/L 0.0051 0.005 <0.0009 <0.0009 <0.0009 <0.0009
D Lead mg/L <0.00034 <0.00034 <0.00034 <0.00034 <0.00034 <0.00034
D Magnesium mg/L 12 12 4.5 4.5 3.6 3.9
D Nickel mg/L <0.0018 <0.0018 <0.0018 <0.0018 <0.0018 <0.0018
D Potassium mg/L 13 12 1.9 2 1.6 1.8
D Selenium mg/L <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012
D Silver mg/L <0.00039 <0.00039 <0.00039 <0.00039 <0.00039 <0.00039
D Sodium mg/L 450 430 18 18 8.3 8.4
D Thallium mg/L <0.00026 <0.00026 <0.00026 <0.00026 <0.00026 <0.00026
D Zinc mg/L <0.01 <0.01 <0.01 <0.01 <0.01 <0.01
T Aluminum mg/L 0.051 J 0.062 J 0.037 J <0.035 <0.035 <0.035
T Arsenic mg/L 0.00097 J <0.00086 <0.00086 <0.00086 <0.00086 <0.00086
T Beryllium mg/L <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002
T Cadmium mg/L <0.000078 <0.000078 <0.000078 <0.000078 <0.000078 <0.000078
T Chromium mg/L <0.0026 <0.0026 <0.0026 <0.0026 <0.0026 <0.0026
T Copper mg/L 0.0052 0.0061 0.0012 J <0.0009 0.00097 J <0.0009
T Lead mg/L <0.00034 <0.00034 <0.00034 <0.00034 <0.00034 <0.00034
T Nickel mg/L <0.0018 <0.0018 <0.0018 <0.0018 <0.0018 <0.0018
T Selenium mg/L <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012
T Silver mg/L <0.00039 <0.00039 <0.00039 <0.00039 <0.00039 <0.00039
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Appendix D Site-Specific Toxicity Testing

Notes:
ABL: Alcoa/Badin Landfill
D: Dissolved
H: Sample was received, prepped, or analyzed beyond the specified holding time.
J: Result is less than the reporting limit but greater than or equal to the method detection limit; the concentration is an approximate value
T: Total

Fraction Analyte Unit ABL Wet Well Unnamed Tributary Little Mountain Creek
10/11/2022 10/13/2022 10/11/2022 10/13/2022 10/11/2022 10/13/2022
T Thallium mg/L <0.00026 <0.00026 <0.00026 <0.00026 <0.00026 <0.00026
T Zinc mg/L <0.01 <0.01 <0.01 <0.01 <0.01 <0.01
T Mercury mg/L <0.00008 <0.00008 <0.00008 <0.00008 <0.00008 <0.00008
D Mercury mg/L <0.00008 H <0.00008 H <0.00008 H <0.00008 H <0.00008 H <0.00008 H
T Nitrate as N mg/L 0.55 H 0.54 H 0.77 H 0.73 H 0.35 H 0.056 H
D Chloride mg/L 20 20 4.3 4.2 6.2 6.2
D Fluoride mg/L 22 20 2.2 2 0.14 0.24
D Sulfate mg/L 180 180 51 49 10 9.8
D Dissolved Organic Carbon mg/L 13 5.4 2.7 2.4 4.5 5.5
T Alkalinity as CaCO3 to pH 4.5 mg/L 890 910 34 36 34 40
T Bicarbonate Alkalinity as CaCO3 mg/L 860 910 34 36 34 40
T Cyanide, Available mg/L 0.011 0.003 <0.0016 <0.0016 <0.0016 <0.0016
T Cyanide, Free mg/L 0.01 0.0027 <0.00079 <0.00079 <0.00079 <0.00079
T Cyanide, Total mg/L 0.049 0.036 <0.002 0.0026 <0.002 <0.002
T Orthophosphate mg/L <0.016 H <0.016 H <0.016 H <0.016 H <0.016 H <0.016 H
T pH SU 8.1 H 8 H 7.5 H 7.6 H 7.6 H 7.8 H