4101_Guilford_HighPoint_Seaboard_MSWLF_RemedialEvaluationReport_FID1404974_20200430

SEABOARD GROUP II AND THE CITY OF HIGH POINT
April 29, 2020
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Remedial Monitoring and Effectiveness Evaluation Report
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The enclosed Remedial Monitoring and Effectiveness Evaluation Report has been prepared to
document the operations of the extraction and treatment system for the 2-year period following
acceptance of the constructed system by the NCDEQ. This Report has been prepared consistent
with the January 15, 2014 Remedial Monitoring and Effectiveness Evaluation Plan that was
submitted to the Department as Technical Memorandum No. E-8.
Please contact me at [phone], if there are any questions or comments regarding the
enclosed Report.
Respectfully,
Seaboard GrDIICi gh Point
R. Craig oslett
Project Coordinator
Enclosure
Cc: Jeff Hayward, Chair, Seaboard Group II Executive Committee
Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
James Schenker - Seaboard Group Technical Committee
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group lI Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

Remedial Monitoring and Effectiveness
Evaluation Report
Seaboard Chemical Facility and Riverdale Drive Landfill
Jamestown, North Carolina
EPA ID No. NCD071574164
Prepared For:
Mr. Joe Ghiold, Project Manager
Ms. Jackie Drummond, Hydrogeologist
NC Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699
Prepared By:
Seaboard Group II and the City of High Point
c/o de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
April 2020

Table of Contents
1.0 INTRODUCTION............................................................................................................. 1
1.1 BACKGROUND...................................................................................................................1
1.2 REMEDIAL ACTION OBJECTIVES..........................................................................................3
2.0 COMPONENTS OF THE REMDIAL ACTION........................................................... 4
2.1 SITE RELATED.....................................................................................................................4
2.2 COLLECTION/TREATMENT SYSTEM.....................................................................................4
2.2.1 COLLECTION SYSTEM(S)..........................................................................................................5
2.2.2 TREATMENT SYSTEM(S)..........................................................................................................
5
3.0 REPORT OBJECTIVES / MONITORING ACTIVITIES .......................................... 9
4.0 MONITORING AND INSPECTION RESULTS........................................................
12
4.1 Treatment System............................................................................................................12
4.1.1 Mechanical Treatment System.............................................................................................12
4.1.2 Natural Treatment System....................................................................................................18
4.2 Monitoring Information...................................................................................................22
4.2.1 Groundwater Hydraulic Data................................................................................................22
4.2.2 Groundwater Analytical Data................................................................................................24
4.2.3 Surface Water Analytical Data..............................................................................................
25
5.0 Conclusions / Recommendations...................................................................................
30
Figure 1
Site Location Map
Figure 2
Site Vicinity Map
Figure 3
Process Flow Diagram
Figure 4
Groundwater and Surface Water Monitoring Locations
Figure 5
Recovery Well Locations
Figure 6
Extraction Well Capture Zone
Figure 7
Total VOC Concentrations
Table 1
Contaminant Removal Efficiency
Table 2
Contaminant Mass Removal
Table 3
Seasonal 1,4-Dioxane Removal
Table 4
Groundwater Elevation Data
Table 5
Groundwater Analytical Results - VOCs
Table 6
Surface Water Analytical Results - VOCs
Appendix A
Remedial Monitoring and Efficiency Evaluation Plan, 2015
Appendix B
Weekly Log Checklist
Appendix C
Quarterly Progress Reports
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1.0 INTRODUCTION
This Remedial Monitoring and Effectiveness Evaluation Report (Report) has been prepared to
provide the North Carolina Department of Environmental Quality (NCDEQ) with two years of
performance data to document the effectiveness of the approved remedial action program being
conducted at the former Seaboard Chemical Corporation and closed Riverdale Drive Landfill Site
(Site) in Jamestown, Guilford County, North Carolina. This Report has been prepared consistent
with the January 15, 2014 Remedial Monitoring and Effectiveness Evaluation Plan (Plan)
submitted as Technical Memorandum No. E-8 and included in Appendix A to this Report.
This Report has been prepared by Seaboard Group II and the City of High Point (Parties) to
document the work performed and data collected since NCDEQ's July 25, 2017 approval of the
construction of the remedy and start of treatment system operations. As detailed in Section 4 of
the Plan, this Report provides an evaluation of the constructed remedy during a two-year
performance test period following NCDEQ's approval of the Construction Completion Report in
July of 2017.
1.1 BACKGROUND
The general vicinity and Site location are shown on Figure 1. The Site consists of two properties
as shown on Figure 2, the former Seaboard Chemical facility property located at 5899 Riverdale
Drive, Jamestown, NC and the adjacent Riverdale Drive Landfill, a closed municipal solid waste
landfill. The former Seaboard Chemical property is approximately 10 acres while the Riverdale
Drive Landfill consists of approximately 102 acres and bounds the former Seaboard facility on
two sides.
Between 1974 and 1989, Seaboard Chemical Corporation operated solvent recovery and fuel
blending processes at the facility. The facility was granted Interim Status under the Resource
Conservation and Recovery Act ("RCRA") as a treatment, storage, and disposal facility in 1982.
The facility was divided into 13 operating areas that included, among other things, distillation,
fractionation, and condensation of organic solvent wastes. In addition, three unlined surface
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impoundments were in service at the facility during the time that Seaboard Chemical was in
operation. The corporation declared bankruptcy and was not able to fund the cost of performing
the necessary site closure and remediation. Removal activities were conducted during 1990 and
1992 to remove all remaining waste materials and certain tanks and equipment from the Seaboard
Chemical property. The removal was conducted by the Seaboard Group I, formed by parties that
may have used the services of Seaboard Chemical Corporation in the past. The Seaboard Chemical
property was administered as an asset of the bankruptcy estate of Seaboard Chemical Corporation
by J. Brooks Reitzel, Jr., bankruptcy trustee. The Trustee was not able to dispose of the property
in the course of the bankruptcy proceeding, and ownership is believed to have reverted to the
dissolved Seaboard Chemical Corporation by operation of law. Seaboard Group II and the City
of High Point have a recorded perpetual easement to perform remedial activities on the property.
The closed Riverdale Drive Landfill (Landfill) was operated, using customary methods in general
use at the time, from the 1950's until October 1993. The Landfill was permitted by the NCDEQ
Solid Waste Section in 1979. During Landfill operations sections of the two tributary streams that
dissect the landfill property were piped so that the landfill could be expanded, and solid waste was
used to fill the drainage valleys. From approximately 1966 until 1970, Landfill operations also
included the disposal and open burning of spent solvents. The burn pits were periodically cleaned
of residue which was accumulated in a mound located near the former burn pits. Presently this
residue mound consists of approximately 600 cubic yards of contaminated soil and is referred to
as the "soil residue mound". The soil residue mound has been capped with an impermeable
synthetic liner and stabilized with a vegetative cover. In 1989, a leachate collection system was
added to control leachate seeps along the slopes of the Landfill. Leachate collection lines were
also installed beneath the landfill parallel to the Southern Intermittent Stream piped section to
intercept leachate flow in the filled stream valley. The leachate from this collection system is
accumulated in concrete storage tanks. The closed Landfill is now capped with a minimum of two
feet of native soil and a vegetative cover.
The Seaboard Group II (Group) was formed to perform a remedial investigation and to prepare a
baseline risk assessment/feasibility study for the former Seaboard site. The Group entered into an
agreement with the City of High Point to perform a remedial investigation since the close
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proximity of the Landfill and former Seaboard facility made joint investigation of the two
properties (Site) advantageous for both the City and the Group. The Parties then entered into an
Administrative Order on Consent (AOC) dated January 30, 1996 with NCDEQ to perform the
remedial investigation. The feasibility study was conducted under a separate AOC dated July 22,
1997.
Remedial investigations conducted at the Site have documented the presence of chlorinated and
non -chlorinated hydrocarbon compounds in soils, landfill leachate, groundwater (shallow and
deep), and surface water. The remedial investigation results also indicated the presence of dense
non -aqueous -phase liquids in the fractured bedrock aquifer underlying the Site.
The Remedy Recommendation Document, approved by the Division of Waste Management on
September 27, 2005, presents a protective remedial strategy for the impacted media based on the
results of the remedial investigation, baseline risk assessment, and feasibility study. The remedial
action consists of groundwater extraction and treatment in combination with institutional controls
including site access control, recorded land use restrictions, and restriction of water supply well
construction. The remedy was designed and constructed to prevent movement of contaminants into
Randleman Reservoir and the Southern Intermittent Stream, as well as to prevent exposure to
impacted soils and groundwater at the Site.
1.2 REMEDIAL ACTION OBJECTIVES
The objectives of remedial action at the Site as listed in the Remedy Recommendation Document
include the following:
• Contain the contaminated soils at the source areas to prevent direct contact by potential
human and environmental receptors, reduce percolation and intrusion of storm water and
reduce migration of compounds of concern ("COCs") into the groundwater,
• Control migration of landfill leachate to prevent discharge to surface water at the Site,
• Control migration of contaminated groundwater at the site to prevent offsite migration and
unacceptable impacts to surface water,
• Achieve compliance with North Carolina surface water quality standards for the COCs in
the surface water of the onsite streams,
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• Achieve compliance with North Carolina groundwater quality standards for the COCs in
the groundwater beneath the Site, and
• Restrict future Site uses that could present potentially unacceptable exposure risks (e.g.,
residential development, use of impacted groundwater, etc.).
2.0 COMPONENTS OF THE REMDIAL ACTION
The components of the remedial action have been broken out into the following categories for ease
in description and comparison to the remedial objectives. These include Site Related and
Collection/Treatment Systems.
2.1 SITE RELATED
The Site consists of two properties, the 10-acre former Seaboard Chemical facility property located
at 5899 Riverdale Drive, Jamestown, NC and the adjacent 102-acre Riverdale Drive Landfill. Both
properties have been closed consistent with local, state and federal requirements and met the goals
of the remedial action objectives by restricting future Site uses that could present potentially
unacceptable exposure risks, including:
• Have been secured in a manner that restricts unauthorized access (fencing),
• Are subject to recorded land use restrictions on future development and groundwater
usage,
• Each property has been closed pursuant to approved closure plans,
• Are inspected on an approved schedule to ensure protectiveness.
2.2 COLLECTION/TREATMENT SYSTEM
Construction of the collection/treatment system is documented in the April 2017 Construction
Completion Report which was approved by NCDEQ on July 25, 2017. This 2017 Construction
Completion Report documents the final status of the remediation systems as constructed and
includes modifications made to the components of system after submittal of the January 15, 2014
Remedial Monitoring and Effectiveness Evaluation Plan that is the basis for this Report. Those
changes, as well as additional modifications implemented during the current reporting period, are
provided in Section 2.3 below:
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2.2.1 COLLECTION SYSTEM(S)
A network of 8 (eight) groundwater recovery wells are utilized for extraction of affected
groundwater. These wells include 1 (one) deep well, PWDR1, and 7 (seven) shallow
wells, RW-SIS1, RW-SIS2, RW-SIS3, RW-SIS4, RW-LFS1, RW-LFS2, and RW-NIS.
In addition, 5 (five) leachate collection tanks, and the NIS sump (2 pumps) accumulate
landfill leachate at the perimeter of the landfill in select locations and from the Northern
and Southern Intermittent Stream discharge areas. The locations of the recovery wells
and leachate collection tanks are shown in Figure 5. Flows from recovery wells RW-
SIS1, RW-LFS1, RW-LFS2, and RW-NIS are combined with the flows from the leachate
tanks in Lift Station 1 (LF-1). The discharge from LS-1 is pumped to Lift Station 2 (LS-
2) where the flow is combined with the flows from PWDR-1, RW-SIS2, RW-SIS3, and
RW-SIS4.
2.2.2 TREATMENT SYSTEM(S)
The components of the treatment systems are physically located on both properties with
the majority of the components being located on the former landfill property. The SCADA
control system, LS-2, filter building, and the clarifier are located on the former Seaboard
property. The description of the Treatment System is broken down between the
Mechanical Treatment System and the Natural Treatment System. All collected water
(groundwater and leachate) is processed through the mechanical system to remove the
majority constituents of concern (COCs) prior to processing through the natural system for
removal of remaining constituents.
Mechanical Treatment System
The Mechanical Treatment System refers to the equipment and processes in the extraction
well network, leachate collection network, LS-1, clarifier system, sludge handling system,
filter building, LS-2, and the irrigation network up to the node control panels (See Figure
3 — Process Flow Diagram). The node control panels separate these components and their
associated treatment equipment from those used in the natural system. The division
between the Mechanical Treatment System and the Natural Treatment System is at the
node control panel buildings on the Landfill's East and West Lobes. Within each node
control building there is a large electrical control panel that contains the data loggers and
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multiplexers, as well as the translation interfaces for the SCADA system. The Mechanical
Treatment System is comprised of the following major components:
• Lift Station 1 - This is a single enclosure used to collect and transfer the recovered
groundwater and the leachate from most of the sources and pump it to the inlet
manifold in Lift Station 2 (LS-2). This includes flow from the five leachate collection
tank pumps, the NIS leachate sump (two pumps), and recovery wells RWNIS-1,
RWSIS-1, RWLFS-1, and RWLFS-2. LS-1 is located nearly 80 feet (vertically)
below the elevation of LS-2 near the Landfill perimeter road. LS-1 contains the
pneumatic controls for most of the shallow groundwater recovery wells and all the
leachate pumps, and the inlet header from the leachate and shallow groundwater
recovery well networks.
• Lift Station 2 - LS-2 consists of seven enclosures used to regulate the inlet flow to the
clarifier, provide pneumatic control for the remaining shallow groundwater recovery
wells, and store and transfer the process flow from the Mechanical Treatment System
to the irrigation network in the Natural Treatment System. The LS-2 inlet manifold
contains the proportioning and shutoff valves used to regulate the system flow into
the clarifier, then into the filter building, and from the filter building into the settling
vat. It also receives the treated process flow from the settling vat proportioning
manifold and controls the flow to the discharge networks.
• Clarifier System - The clarifier is a vertical wall cylindrical clarifier system which is
approximately 15 feet tall and 18 feet in internal diameter. It receives all the flow
from all sources in LS-1 and LS-2 and performs the initial treatment to remove
mineral salts by pH adjustment, flocculation and settling.
• Sludge Handling System - The sludge from the bottom of the clarifier is pumped to
one of two sludge dewatering boxes (referred to as tipper boxes). These two
dewatering boxes are mounted on elevated stands to allow them to be tipped to empty
the dewatered sludge. A polymer is added to the sludge in the line between the
clarifier and the tipper boxes to enhance dewatering. Sludge is directed to one of the
tipper boxes until it is full. At that time, flow is directed to the idle tipper box, and the
full box drains any free water to a sump that is pumped into the clarifier equalization
IM

tank. Once the sludge is dried sufficiently, the box is emptied, and the solids disposed
on -site.
• Filter Building - The filter building receives flow from the clarifier including LS-1
and the shallow bedrock recovery wells RWSIS-2, RWSIS-3, RWSIS-4, and deep
groundwater pumping well PWDR-1. It provides filtering to 25-microns+/-, addition
of a sequestrant, and polishing it in a 6-tray air stripper. It is then passed through to
the settling vat in the effluent treatment system.
• Maintenance Building - The maintenance building is located near the filter building
and contains the lime and ferric chloride storage tanks, chemical feed pumps, air
compressor and other appurtenances associated with the clarifier chemical feed
systems. It is also used for storage of spare parts and equipment.
Natural Treatment System
The Natural Treatment System is a 32±-acre tree stand consisting of a variety of conifer
tree species first planted in 2007. An irrigation system for the trees stand is divided into
16 approximately two -acre zones that can be activated sequentially to dispense water at
approximately 50 gpm per zone. An irrigation monitoring and control system has been
installed that is based on data from soil moisture and soil tension (matric potential) sensors
installed at various depths in each zone. A PLC -based controller for the monitoring and
control system is programmed to warn the operator of over -irrigation of the Natural System
and preclude excessive drainage below the root zone of the trees. If the soil profile within
a given zone becomes too wet, and percolation below the tree's root zone may become
problematic, the operator can skip the zone and move on to the next zone or reduce
watering time to that zone. The Natural System is comprised of the following components:
• The tree stand, first planted in 2007, occupies 22 acres on the west lobe of the landfill
and about 10 acres on the east lobe:
o The tree species include Loblolly Pine, Virginia, and Japanese Black Pine as well
as Eastern Red Cedar.
o The trees are arranged in rows 10 feet apart, and trees within a row are roughly on
10-foot centers (approximately 435 trees per acre).
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• The irrigation system for the trees stand is divided into 16 approximately two -acre
zones that can be activated sequentially to dispense water at about 50 gpm (0.055 inches
per hour).
• Each irrigation zone has multiple Netafim Uniram driplines.
• Liquid fertilizer can be dispensed to the tree stand via the driplines (fertigation). A
fertilizer tank that can be filled with liquid nutrients is connected to a pump, solenoid
valve and a flow meter. Nutrient solution can be injected, at a specific dilution factor,
into the irrigation water.
Natural Irrigation Control System
In each of the zones, the drip -irrigation system is regulated by an automatic monitoring and
control system that prevents over -irrigation and excessive drainage below the root zones
of the trees. If the soil in a specific zone becomes too wet (water tensions less than 2 kPa,
see below) the control system skips the zone and moves to the next zone; irrigation is
resumed when the soils in the zone are sufficiently dry. Each irrigation zone is
instrumented with two types of sensors that provide data for the automatic calculation of
soil water tension (kPa) by the monitoring and control system:
• Irrometer Watermark sensors measure resistance to the flow of electricity expressed in
kohms (M).
• Soil temperature sensors. On each lobe of the landfill, in one of the nests of soil
moisture sensors, three soil temperature sensors were installed at the same depth as the
moisture sensors. A fourth sensor in each nest was installed at approximately 4-inches
below grade.

3.0 REPORT OBJECTIVES / MONITORING ACTIVITIES
The primary objective of this Report is to provide Site information following two consecutive
years of site operations to address the Remedial Action Objectives as described below:
As outlined in the January 15, 2014 Remedial Monitoring and Effectiveness Evaluation Plan the
objectives for this Report are:
• Evaluate the operation and effectiveness of the mechanical treatment system, including
extraction well flow rates, operating parameters, and contaminant removal efficiency.
• Evaluate the effectiveness of the natural treatment system to remove 1,4-dioxane from
the pre-treated groundwater and leachate. Document the 1,4-dioxane removal
efficiencies of the natural treatment system and operational parameters of the distribution
system.
• Evaluate volatile organic compound (VOC) concentrations and hydraulic containment
(capture zone) in groundwater at the Site. Evaluate groundwater flow direction and
gradients during operation of the extraction wells.
• Evaluate surface water quality in the Southern Intermittent Stream and Randleman
Reservoir with respect to the groundwater containment system.
• Document the Site inspection and maintenance protocols to assure continued operation
of the remedial systems.
This report provides a comprehensive review of data collected as part of the remedial action that
has previously been reported in quarterly progress reports and annual Water Quality Monitoring
Reports. A summary description of the operational, monitoring, maintenance, and inspection
activities associated with this Report by category is provided below. The categories include Water
Quality Monitoring, Collection and Treatment System Monitoring, and Inspections.
Water Quality Monitoring
Groundwater elevations and water quality samples are collected annually from twenty-five
monitoring wells at the Site (Figure 4). The water levels are determined manually during the
annual water quality monitoring events and seven wells (PW-6D, OW-DR2, OW-DR3, OW-DR4,
OW-LFS2, PW-15D, and PW-16D) are equipped with automated water level pressure transducers
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to record groundwater elevations on a daily basis. The seven wells equipped with pressure
transducers allow for evaluation of the capture zone of the primary extraction well (PW-DR1).
The groundwater samples collected for laboratory analysis are evaluated for VOCs, 1,4-dioxane,
and field parameters (pH, conductivity, temperature, and dissolved oxygen). The groundwater
sampling and analysis are conducted in accordance with the approved November 1995 Sampling
and Analysis Plan and the 2014 Remedial Monitoring and Effectiveness Evaluation Plan.
Surface water monitoring is performed annually at nine surface water stations, including two
locations on the Northern Intermittent Stream, three locations on the Southern Intermittent Stream,
and four locations on Randleman Reservoir (Figure 4). The four sampling locations on Randleman
Reservoir are collected at two discrete depths; just below the surface and one foot off the bottom
of the reservoir. The surface water samples collected for laboratory analysis are evaluated for
VOCs, 1,4-dioxane, and field parameters (pH, conductivity, temperature, and dissolved oxygen).
The surface water sampling and analysis are conducted in accordance with the approved November
1995 Sampling and Analysis Plan and the 2014 Remedial Monitoring and Effectiveness
Evaluation Plan.
Collection and Treatment System
Following construction completion of the collection and treatment system, the mechanical and
natural systems were subject to testing procedures to prove the system was operating as designed.
This "prove -out" testing is presented in detail in the Construction Completion Report. This
"prove -out" testing documented that different components of the constructed elements could meet
the design requirements that were established to address the Remedial Action Objectives for the
system. The operation and maintenance plan has been developed to outline data collection and
monitoring requirements (in addition to operation requirements). The physical data collection and
monitoring activities are documented on a weekly basis by the O&M contractor following the
weekly log checklist. A copy of the weekly log checklist is provided as Appendix B. The collected
information is then used to prepare a summary of Site activities that are submitted to NCDEQ as
Quarterly Progress Reports. Data provided with the Quarterly Progress Reports includes:
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Meter Readings — Weekly flow information from various locations including leachate
collection system, groundwater extraction wells, discharge to natural treatment areas, compressor
run times, and pump counter information from individual extraction locations (wells and sumps).
Chemical Levels — Tank levels are tracked showing chemical usage of the various
chemicals employed in operating the system (lime slurry, flocculant, sulfuric acid, sequestrant,
and sodium hydroxide.
In -House Lab Samples — Weekly tests are run on the effluent in order to check for changes
prior to the monthly sampling. The weekly tests are run on -site for iron, total suspended solids,
pH, oxidation-reduction potential, conductivity, total dissolved solids, and chemical oxygen
demand. Changes in effluent parameters alert the operator of issues so that the necessary actions
can be taken to resolve any potential problems.
Contract Lab Samples — Monthly samples are collected from the raw influent water, prior
to the Air Stripper, and effluent water prior to discharge to the Natural Treatment System. These
samples are analyzed by a NC Certified Laboratory for volatile organic compounds, inorganics,
hardness, pH, total dissolved and suspended solids, and 1,4-dioxane. These samples evaluate the
effectiveness of the metals removal process and air stripper operation prior to distribution to the
Natural Treatment System.
Well Transducer Readings — Weekly well levels are recorded in the observation wells that
are equipped with level transducers. These levels confirm the drawdown by the recovery wells
and offer evidence of the capture zone.
Comments — Specific details on run time, alarms, tasks completed, inspections, shutdowns
and resolutions. Further detail is provided by the operator in the transmittal of the weekly logs.
Checklist — The check list is composed of dozens of items that need to be checked or
serviced for preventative maintenance. The checklist items are broken into categories of bi-
weekly, weekly, monthly, and quarterly.
Inspections
Inspections of the Site and operations are conducted on a weekly basis as noted on the Weekly
Log Checklist. Inspections are conducted during routine operations and are documented in the
daily logbook when issues are identified. Sitewide inspections are also conducted on a quarterly
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basis and issues are identified in the Site logbook and reported in weekly reports. If issues are
identified, a narrative summary of the issues and the corrective measures taken are provided.
The Landfill is monitored by the City on a quarterly basis for the presence of methane/explosive
gases at the waste boundary. These monitoring events are conducted by a third -party contractor
and the results are submitted to NCDEQ quarterly. In addition to the routine site inspections of
the natural treatment areas, weekly inspections are conducted by City personnel to identify any
issues involving erosion control, site security, leachate seepage, etc. Inspections are also
conducted after significant rainfall events to assure site erosion control measures remain effective.
4.0 MONITORING AND INSPECTION RESULTS
The information provided in this report includes two years of monitoring following the NCDEQ's
approval of the construction of the remedy, August 25, 2017 through December 2019. This
information is essentially a summary of the data that has been previously reported to the
department in the form of Quarterly Progress Reports, including the 3rd Quarter 2017 through the
4th Quarter 2019, and copies of the Quarterly Progress Reports are provided in Appendix C. There
have also been three annual Water Quality Monitoring events completed since the 2017 approval
of the Construction Completion Report. These Water Quality Monitoring Reports have been
submitted to NCDEQ under separate cover.
4.1 Treatment System
The treatment system is a two-step process that includes the Mechanical System (i.e. pumps,
clarifier, filters, ...) and the Natural System (phytoremediation and irrigation systems).
Discussions of each are presented separately due to the specific monitoring for each.
4.1.1 Mechanical Treatment System
The Remedial Monitoring and Effectiveness Evaluation Plan provided the framework to
monitor and document system operations and performance over the two-year period
following NCDEQ's approval of the completion of remedial system construction. The
Plan did not anticipate the number of difficulties that would be encountered in getting the
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system operational or the modifications that would be implemented to optimize
performance throughout this two-year performance period. The following major
modifications were made following NCDEQ's January 31, 2014 approval of the Plan:
• September 2014 — Installation of permanent water level transducers in 7 (seven) select
monitoring wells connected to SCADA system.
• July 2015 — Hazen & Sawyer treatability bench -scale study for mechanical treatment
system completed.
• Fall 2016 — Installation of clarifier and sludge handling equipment to improve
removal of solids. Chemical feeds adjusted per Hazen & Sawyer recommendations.
• November 2016 — Issued Technical Memo No. 10 which provided for removal of the
AOP+ Unit (PhotoCat) from the treatment system. This memo also provided for the
year-round use of the natural treatment system (phytoremediation) for the removal of
1,4-dioxane.
July 2017 — Approval of the Construction Completion Report
• February 2018 — Hazen & Sawyer re-evaluated mechanical treatment system,
recommended additional air sparging prior to clarifier and chemical dosing
modifications.
• Spring 2018 — New air sparge tank installed prior to clarifier to enhance metals
removal. Installed surge suppressors to protect treatment system components from
lightning strikes and other electrical spikes.
• December 2018 — Replaced fiber optics cable from LS-1 to primary treatment
building.
• Summer 2019 — Removed AOP+ (PhotoCat) system from LS-2 treatment enclosure
for recycling.
• October through December 2019 — Major upgrade of PLC/HMI control systems.
• Ongoing — Replacement of collection system pumps to higher capacity pumps. The
majority of extraction pumps have been changed to higher capacity pumps based on
monitoring activities.
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In addition to the "major" modifications noted there were many modifications/
optimizations completed throughout the 2-year reporting period. These modifications are
presented on the following table:
Issues Encountered
Date
Resolution
• Frozen chemical feed lines
18-Jan
Added heat trace and/or insulation to lines
and irrigation control valves
• Electrically damaged
18-Feb
Added surge suppression on low voltage lines
communication 1/0 cards
• Intermittent power failures
18-Feb
Added low voltage UPS devices
• Scaling of pumps and process
18-Mar
Modified chemical feed rates and sequestrant
lines
type per Hazen report
• Scaling of pumps and process
18-May
Installed air sparge tank prior to clarifier
lines
• Intermittent communication
18-Dec
Replaced fiber optic cable from LS-2 to LS-1
loss
and the node buildings
• Scaling of pump lines from
18-Dec
Re -piped the force mains in LS-1 to allow
LS-1 to LS-2
individual citric washes while in operation
LS-1 compressor failed due to
Replaced LS-1 compressor and wired LS-2
• water build-up from
18-Dec
compressor for temporary back-up
unloading
• Intermittent communication
19-Jan
Replaced Profibus connections
loss
• Pressure loss at LS-1
19-Jun
Replaced pneumatic pumps, valves, and
compressor
regulators
• Clogged sludge lines
19-Oct
Replaced sludge pumps and re -piped
manifolds
Continual communication
Replaced all drives, communication VO racks,
• losses and lack of
19-Oct
HMI's and PLC
replacement parts
As presented, modifications were implemented throughout this two-year performance
period with the most recent "major" modification, PLC/HMI replacement, being completed
in December 2019. Even with the difficulties encountered, the overall system run time has
been calculated to be 64.8% during this two-year monitoring period. Excluding planned
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shutdowns (system cleaning, preventative maintenance, ...) system run time is calculated
to be over 75%. In addition, system run time has increased significantly following
completion of the ongoing modifications listed above.
Mechanical System Monitoring
Monitoring of the mechanical system is different for the various components of the entire
system. For the purposes of discussion, the components can be simply broken out into the
collection system, clarifier/sludge handling process, and treatment system.
The collection system consists of the five leachate collection tank pumps, the NIS leachate
sump (two pumps) and 8 ground water extraction wells (1 deep well and 7 shallow wells).
PWDR1 is the main extraction well for the collection system with the highest sustained
flow rate. Leachate LCHT-NIS 1 and LCHT-NIS2 pumps are both located in the NIS sump
and flow through the main header. Below is a summary of the extraction points with
average sustained flow rates for each pump.
-15-

AVERAGE
FLOW
SOURCE ID
GPM
DEEP WELL:
PWDR-1
16.0
SHALLOW
WELLS:
RW-NIS
3.5
RW-LFS1
3.9
RW-LFS2
0.8
RW-SIS1
0.6
RW-SIS2
1.0
RW-SIS3
1.1
RW-SIS4
0.3
SUB -TOTAL:
11.1
LEACHATE:
LCHT-1
0.4
LCHT-2
3.3
LCHT-3
0.8
LCHT-4
1.7
LCHT-5
3.4
LCHT-N IS1
2.7
LCHT-NIS2
2.4
SUB -TOTAL:
14.7
TOTAL
41.8
Total flow from the wells and percentage of overall total flow is also measured/calculated
for assessing the system operations. This flow data is periodically compared with the
hydraulic data to ensure optimal operation, and to balance the collection system and
maintain adequate capture. This is discussed further in Section 4.2.1 of this report.
-16-

ESTIMATED* INDIVIDUAL SOURCE VOLUME TOTALS
(Q4 2017 - Q3 2019)
TOTAL
FLOW
PERCENTAGE
SOURCE ID
(GALLONS)
OF TOTAL M)
PWDRI
8,818,859
41.9%
LCHT-1
28,612
1.0%
LCHT-2
1,744,264
9.0%
LCHT-3
86,326
2.2%
LCHT-4
568,665
4.5%
LCHT-5
1,856,800
9.4%
LCHT-NIS 1
2,174,916
7.4%
LCHT-NIS2
1,950,093
6.6%
SUB -TOTAL
8,409,676
40.0%
RW-NIS
1,391,555
4.1%
RW-LFS 1
61,694
4.6%
RW-LFS2
532,112
0.9%
RW-SIS 1
193,967
0.7%
SUB -TOTAL
2,179,329
10.4%
RW-SIS2
112,968
2.3%
RW-SIS3
417,816
2.6%
RW-SIS4
654,166
0.7%
SUB -TOTAL
1,184,949
5.6%
CITRIC/ZONE VALVES/TANK
FILL
175,569
0.8%
BACKWASH
124,234
0.6%
RAIN
153,534
0.7%
SUB -TOTAL
453,337
2.2%
TOTAL
21,046,150
100.0%
* SUB -TOTALS & TOTALS ARE ACTUAL VOLUMES, NOT ESTIMATES
The clarifier/sludge handling process of the mechanical system is installed at the front end
of the treatment system to remove inorganics from the combined influent of all eight (8)
extractions wells, five (5) leachate collection tanks and the NIS sump with two pumps
(influent water). The influent water is dosed with lime slurry and polymer as it enters the
clarifier to help the inorganics drop out of solution and to the base of the clarifier unit. This
-17-

material is then thickened and pumped to be further dried prior to collection and placement
in a designated area on the landfill cap. On -site disposal of the dried sludge for beneficial
re -use was approved by NCDEQ on February 6, 2015. This approval required re-
evaluation of the sludge by full TCLP analysis a minimum of every three years. This
material is currently sampled annually for the full TCLP analyte list to ensure continued
composition for beneficial re -use.
The treatment system is monitored via weekly in-house testing and monthly contract lab
analysis. Weekly tests are run on the effluent water in order to check for changes prior to
the monthly sampling. Changes in effluent water parameters alert the operator to issues so
that the necessary actions can be taken to resolve any potential problems. Monthly samples
are collected from the raw influent water, prior to the Air Stripper, and effluent water prior
to discharge to the Natural Treatment System. These samples are analyzed by a NC
Certified Laboratory for volatile organic compounds, inorganics, hardness, pH, total
dissolved and suspended solids, and 1,4-dioxane. The results of these samples are used to
evaluate the effectiveness of the metals removal process and air stripper operation prior to
distribution to the Natural Treatment System.
4.1.2 Natural Treatment System
The Natural System consists of an approximately 32-acre stand of mature conifers. The
trees are established on landfill cover soils that are a minimum of 24 inches thick,
(thickness above the waste layer per the approved closure plan) confirmed through the
installation of the natural treatment system. Effluent water from the mechanical treatment
system is used to irrigate the tree stand via sub -surface irrigation driplines. The natural
treatment system is used to treat constituents that remain in the process water following
treatment by the mechanical system. This primarily includes 1,4-dioxane but at times also
includes low concentrations of VOCs (chlorinated ethenes, chlorinated ethanes, and
"other" organic contaminants; the "other" contaminants included benzene and benzene
derivatives, other BTEX compounds, methylene chloride, etc.).
in

The natural treatment system has proven to be effective at treating the 1,4-dioxane through
the process of phytovolatilization. The 1,4-dioxane contained in the irrigation water is
taken up by the roots of the trees, translocated to the shoots, and then exits the trees via the
stomata along with the transpiration gas. The rate of phytovolatilization is tied to
transpiration. Once in the atmosphere, the 1,4-dioxane is photo -degraded with a half-life
of a few hours. The VOCs in the irrigation water are removed by biodegradation in the
rhizosphere soil of the trees (the zone of soil influenced by plant roots, the rhizosphere, is
densely colonized by microbes that have been proven to degrade organic contaminants).
Results indicated that the natural system has been effective at removing contaminants
applied via the irrigation water. Based on calculations in 2018, 89% of the 1,4-dioxane
was calculated to be removed through the natural system; in 2019 93.5% was calculated to
be removed. For the chlorinated ethenes and ethanes, in both years, nearly 100% of the
contaminants were removed. For the other contaminants treated in 2018, 91.6% were
removed; in 2019 88.5% were removed. During the 2-year interval, 19.6 million gallons
of treatment system effluent was treated containing 61.3 Kg of 1,4-dioxane and a total mass
of organic contaminants of 458 Kg.
Natural System Monitoring
The efficiency of the Natural System is based on data from the lysimeter system. The key
efficiency parameter is the mass of contaminants that are discharged through the drip
emitters of the irrigation lines and drain below the root zone of the trees, which is referred
to as "drainage water." This drainage water is collected using a suite of bucket-lysimeters
(pan lysimeters or pore -water samplers) installed at specific locations in the irrigation
zones on the east and west lobe of the landfill. There are currently 13 lysimeters (6 on the
west lobe and 7 on the east lobe) that are used to calculate removal efficiencies by
collecting water percolating vertically when the landfill cover soils are at or above field
absorption capacity.
The upper drainage -collecting faces of the bucket lysimeters (1 ft2 in area) are roughly 3
feet below grade (i.e., at the interface between the landfill cover soil and the waste layer)
-19-

and at locations roughly within the tree rows. The drip lines of the irrigation system run
between the rows of trees, and a given lysimeter receives irrigation water from two 'feeder
lines" running on either side of the tree row in which it is installed. The feeder lines
dispense metered volumes of irrigation water to "irrigated area' of variable length (29 to
260 ft long) and 20 ft wide. Each lysimeter is located within an irrigated area of specific
dimensions. Irrigated areas range from 570 ft2 for lysimeter 15 to 5,279 ft2 for lysimeter
14. Data are collected for lysimeters in thirteen different irrigation zones.
Data recorded for each of the 13 lysimeters for a specific quarter, include:
• Volumes of irrigation water delivered to the various irrigated areas per quarter,
measured using water meters on the two feeder lines.
• Volumes of drainage water collected in the specific lysimeters;
• Analytical data for the concentrations of 1,4-dioxane, chlorinated ethenes, chlorinated
ethanes, and other organics recovered in the drainage water from the specific
lysimeters.
The lysimeters collect drainage water from the 3-foot thick layer of soils standing above
the drainage face of the lysimeter when the water content of the soils is at or above field
absorption capacity. The drainage water contains the solutes dissolved in the soil water
including contaminants derived from the irrigation water e.g. 1,4-dioxane. The efficiency
of the Natural System increases as the ratio of contaminant removed/contaminates leached
increases. A number of factors go into calculating/estimating the efficiency of the 32-acre
Natural System including:
• Calculation of the apparent lysimeter drainage area. The inches of water collected in
a given lysimeter do not necessarily reflect the inches of water falling on the 1 ft2 of
soil standing above drainage face due to horizontal or preferential flows below grade.
• The lysimeter drainage area of each specific lysimeter.
• Irrigation rate for the irrigated area measured using water meters. This includes a
water balance consisting of irrigation plus precipitation.
• Analytical results from the mechanical treatment system and lysimeters.
-20-

The remedial water treatment system is a two-step process: In Step 1, recovered
groundwater plus leachate (influent water) is routed to the mechanical treatment system.
In Step 2, effluent water from the mechanical system is used to irrigate the natural system.
Drainage water from the natural system is collected in lysimeters. Monitoring the
efficiency of Step 2 involves estimating the contaminant mass added via the irrigation
water versus the contaminant mass that drained below the root zone of the trees. The
influent water contains the following categories of contaminants: 1,4-dioxane, chlorinated
ethenes, chlorinated ethanes, and "other" organic contaminants (the "other" contaminants
include benzene and benzene derivatives, other BTEX compounds, methylene chloride,
etc.). The contaminant removal efficiency for Steps 1 and 2 is considered separately for
each class of contaminants, as well as the efficiency of the combined process. The annual
percent contaminant removal for Steps 1 and 2 for the various classes of contaminants is
compared for 2018 and 2019 in Table 1.
The total volumes of recovered groundwater plus leachate treated by the Seaboard system
for 2018 and 2019, plus the two-year totals are presented in Table 2. Also listed in the
table, for the same time intervals, are the total contaminant masses treated by the system
for each of the categories of pollutants. Thus, during 2018 and 2019, 19.6 million gallons
of recovered groundwater plus leachate were treated that contained 61.3 Kg of 1,4-dioxane
and 458 Kg of total contaminant mass. Based on the calculations outlined above, it was
estimated that 5.4 Kg of 1,4-dioxane (and 0.2 Kg of chlorinated ethanes and other organics)
drained below the root zones of the trees.
Seasonality of 1,4-Dioxane Removal Efficiency by Phytovolatilization
As previously discussed, the treatment process for 1,4-dioxane is phytovolatilization,
which is most effective during the growing season. Phytovolatilization relies on plant
uptake and translocation of 1,4-dioxane in the irrigation water. During the growing season,
when transpiration is maximal, the rate of water input from irrigation plus precipitation
generally will be balanced against the rate of water exiting the natural system via
evapotranspiration, and 1,4-dioxane treatment will be maximal. Initial calculations based
-21-

on the acreage, soil absorption capacity, irrigation rates and average rainfall of the natural
system predicted that during winter months, the transpiration rate of the trees might not be
as efficient given the rate of water input (irrigation plus precipitation), and relatively more
water containing 1,4-dioxane would percolate through the root -zone soil. Data from 2018
and 2019 are presented in Table 3 that suggest the 1,4-dioxane removal efficiency for Step
2 natural treatment was about the same for Q1, Q2 and Q4, (average 89.1 ± 0.12), but was
significantly higher for Q3 (97.2). These data indicate a significant positive seasonal effect
during the warmest months of the growing season (July through September).
4.2 Monitoring Information
The water quality monitoring network at the Site is evaluated on an annual basis. The locations
of the groundwater and surface water samples collected during the annual monitoring event are
shown on Figure 4. The primary objectives of the annual groundwater and surface water
monitoring program are:
• Monitor VOC concentrations and migration of the VOC-affected groundwater;
• Monitor groundwater elevations, hydraulic gradients and flow directions;
• Monitor surface water quality in Randleman Lake, Northern Intermittent Stream, and
Southern Intermittent Stream to assess potential impacts from VOC-affected groundwater
discharge.
The groundwater and surface water collection procedures and laboratory analytical methodology
are provided in the Annual Water Quality Monitoring Reports, previously submitted to NCDEQ.
4.2.1 Groundwater Hydraulic Data
The depth to groundwater is measured in the 25 compliance monitoring wells during each
annual water quality monitoring event (Figure 4). The groundwater elevations are
calculated relative to the surveyed measuring point (top of casing) for each monitoring
well. A groundwater potentiometric map, using the most recent elevation data, is provided
as Figure 4. This potentiometric map primarily represents groundwater flow in the bedrock
-22-

aquifer. The historic groundwater depths and elevation data for the Site are summarized
in Table 4.
In the bedrock aquifer, the general groundwater flow direction across the Site is
northeastward toward Randleman Lake. The operation of extraction well PW-DR1 has
created an artificial gradient along the east -west segment of Randleman Lake. The
horizontal hydraulic gradients observed along the east -west segment of Randleman Lake
have been determined from water levels obtained during operation of the remedial system.
The following horizontal hydraulic gradients were determined from the water level
information:
• PW-DR1 to PW-13I:
0.052 ft/ft
• MW-3C to OW-DR2:
0.19 ft/ft
• PW-DRI to PW-16D:
0.026 ft/ft
• PW-DRI to PW-15D:
0.043 ft/ft
• PW-DRI to PW-6D:
0.027 ft/ft
The vertical component of groundwater flow is determined from an evaluation of
groundwater elevations observed in nested well pairs. Five nested pairs of monitoring
wells were evaluated for vertical groundwater flow along the east -west segment of
Randleman Lake. The groundwater elevations were determined from water levels obtained
during operation of extraction well PW-DR1. The following vertical groundwater
gradients were determined from the observed groundwater elevations:
• MW-3C/OW-DR2:
0.002 ft/ft upward
• MW-16S/MW-16D:
0.010 ft/ft downward
• MW-15S/MW-15D:
0.020 ft/ft downward
• MW-6FMW-6D:
0.024 ft/ft downward
• PW-5D/OW-DRI :
0.040 ft/ft upward
-23-

The horizontal and vertical gradients determined in the area of extraction well PW-DR1
demonstrate the effective hydraulic control created along the east -west segment of
Randleman Lake.
A graphical representation of the capture zone created by extraction well PW-DR1 has
been developed using water levels obtained from observation wells on both sides of
Randleman Lake. The observation wells were gauged during operation of the extraction
system. The capture zone, represented on Figure 6, demonstrates an elliptical contour
which mimics the anticipated capture zone based on the conceptual geologic model for the
Site. The conceptual geologic model for the Site identified a major east -west trending,
southward -dipping fault which intercepts the main contaminant plume at Randleman Lake.
This fault structure (Deep River Fault) is responsible for the east -west trending section of
the Randleman Lake and controls groundwater discharge and contaminant migration in the
Southern Intermittent Stream valley. The primary extraction well PW-DR1 was located,
both horizontally and vertically, to take advantage of this fault zone and optimize the
effectiveness of the extraction system.
The capture zone depicted in Figure 6 reflects the influence of the east -west trending Deep
River Fault zone. The structural control of this fault zone, and the interconnectivity with
other subsurface geologic structures, is further evidenced by the observed response to
operation of extraction well PW-DR1. The operation of the primary extraction well PW-
DR1 results in an immediate (-2 hours) drawdown in observation well PW-16D.
Observation well PW-16D is located approximately 820 feet to the northeast, and on the
north side of Randleman Lake, of extraction well PW-DR1. The observed drawdown
response, on both sides of Randleman Lake, demonstrates the efficacy of extraction well
PW-DR1 to intercept Site contaminants at the east -west segment of Randleman Lake.
4.2.2 Groundwater Analytical Data
The remedial action design allows for extraction of groundwater to contain contaminant
plume migration and intercept impacted groundwater recharge into Randleman Lake, the
Northern Intermittent Stream, and the Southern Intermittent Stream. This remedy provides
-24-

the most effective technically feasible remediation, incorporating both containment of
contaminant migration and reduction of contaminant mass through treatment of extracted
groundwater.
The results of past water quality monitoring events indicate the main mass of VOC and
1,4-dioxane impacted groundwater generally extends northeastward across the Site to the
Randleman Lake basin. As shown on Figure 7, the highest concentrations of Site
contaminants are present in the northeast corner of the former Seaboard facility near the
location of a former unlined surface impoundment. Prior to closure and capping, between
1984 and 1986, the area of the former impoundment served as a primary source area of
VOC and 1,4-dioxane releases to the groundwater at the former Seaboard Facility.
Additionally, elevated VOC and 1,4-dioxane concentrations in groundwater are also
present in the area of the soil residue mound, a contaminant source area located at the
Landfill, which has also been closed and capped.
The results of groundwater monitoring over this 2-year performance evaluation period have
shown variable water quality analytical results. The variable analytical data appears to be
a result of aquifer recharge caused by extreme weather conditions. Prior to the November
2018 water quality monitoring event, Hurricane Florence (September 2018) and Hurricane
Michael (October 2018) contributed excessive rainfall amounts and flooding in the area
which resulted in elevated VOC concentrations in groundwater across the Site.
Conversely, the September 2019 water quality monitoring event was conducted after an
extremely dry summer which resulted in historical low VOC concentrations in the observed
groundwater analytical data. As the remedy for the Site is based on containment of the
contaminant plume, these variations in water quality should not affect the effectiveness of
the remedial system. A historical summary of groundwater analytical data is provided in
Table 5.
4.2.3 Surface Water Analytical Data
Surface water sampling is conducted at the Southern Intermittent Stream, Northern
Intermittent Stream, and at various locations and depths in Randleman Lake (Figure 4).
-25-

The surface water results for VOCs and 1,4-dioxane are summarized in Table 6. A
discussion of water quality results for each of the three surface water locations is provided
below:
Randleman Lake
The main plume of VOC-impacted groundwater migrating from the bedrock aquifer to
Randleman Lake is intercepted by pumping from groundwater extraction well PW-DR1,
located at Randleman Lake near the Southern Intermittent Stream confluence. The
operational pumping rate for PW-DR1 is 14 - 16 GPM. The pumping rate varies to account
for recharge rates and to maintain a drawdown elevation of approximately 658 msl. Four
additional shallow groundwater recovery wells (Figure 5) are also located along
Randleman Lake: RW-NIS 1 located at the Northern Intermittent Stream confluence with
Randleman Lake; RW-LFS 1 and RW-LFS2 located along the southeast portion of the
Landfill; and RW-SIS 1 located near the SIS confluence with the Randleman Lake. The
pumping rates of the four additional extraction wells along the Randleman Lake are:
• RW-NIS:
3.5 GPM
• RW-LFS1:
3.9 GPM
• RW-LFS2:
0.8 GPM
• RW-SIS 1:
0.6 GPM
The Randleman Lake surface water sampling stations include:
• SW-6: Upstream sample (3,500' upstream of Site)
• SW-DRP-2: Adjacent to PW-DR1 and Lift Station 1
• SW-7: Downstream of Site at Interstate 85 bridge
• SW-DRP-11: Downstream of Site (4,100') at Richland Creek
A review of surface water quality data from Randleman Lake samples has shown only
minor concentrations of 1,4-dioxane since startup of the treatment system on August 25,
2017. No VOCs have been reported above the laboratory method reporting limit in any of
-26-

the Randleman Lake surface water monitoring stations over the 2-year performance
evaluation period. Minor concentrations of 1,4-dioxane have been reported in all four of
the surface water stations during past three water quality monitoring events:
Station ID October 2017 November 2018
SW-6 (background)
SW-DRP-2
14.0 µg/l
3.4 µg/l
<2 µg/l
<2 µg/l
September 2019
1.6 µg/l
1.4 µg/1
SW-7 26.0 µg/l <2 µg/l <2 µg/1
SW-DRP-11 31.0 µg/l <2 µg/l 1.3 µg/l
A review of this data indicates an intermittent upgradient source of 1,4-dioxane which
likely affects Randleman Lake surface water quality adjacent to and downstream of the
Site. Operation of the collection and treatment systems has resulted in no appreciable
increase in 1,4-dioxane concentrations in surface water data collected during the 2-year
performance evaluation period.
Southern Intermittent Stream
To the north of the former Seaboard facility operational area, five shallow groundwater
extraction wells have been installed to intercept groundwater migrating to the Southern
Intermittent Stream (Figure 5). Three extraction wells (RW-SIS2, RW-SIS3 and RW-SIS4)
are located along the south bank of the stream and have a pumping rate o£
• RW-SIS2: 1.0 GPM
• RW-SIS3: 1.1 GPM
• RW-SIS4: 0.3 GPM
Two extraction wells (RW-SIS5 and RW-SIS6) are located along the north bank of the
stream and were installed in the event containment is not achieved by pumping at the three
wells along the south bank. These two extraction wells are currently inactive. The location
of the groundwater extraction wells is shown in Figure 5.
-27-

The Southern Intermittent Stream surface water sampling stations, shown on Figure 4,
include:
• SW-3: Downstream of the former Seaboard site, upstream of the Landfill
• SW-4: Downstream of the former Seaboard site and the Landfill
• SW-5: Upstream of Seaboard/Landfill, downstream of Soil Residue Mound
The three surface water monitoring stations on the Southern Intermittent Stream each
monitor a different potential source area. The water quality data reported for the three -
surface water monitoring station is discussed below:
• Station SW-5: This surface water monitoring station is the furthest upstream sample
collected on the Southern Intermittent Stream. It is also downgradient of the closed
Soil Residue Mound which has shown elevated concentrations of Site contaminants.
While no VOCs have been reported above the laboratory method reporting limit at
this sample location, the compound 1,4-dioxane has been reported during the three
water quality monitoring events conducted during the 2-year performance evaluation
period. The reported concentration of 1,4-dioxane at the SW-5 surface water
monitoring location has ranged from 5.8 ug/1 (September 2019) to 23.0 ug/1
(November 2018).
• Station SW-3: This surface water monitoring station is immediately downstream of
the former Seaboard facility but upstream of the Landfill. Historically, this surface
water monitoring location has reported numerous VOCs at concentrations exceeding
established NC 2B Surface Water Standards. Since startup of the treatment system,
the reported VOC concentrations have generally not exceeded the laboratory method
reporting limits or NC 2B Surface Water Standards. A minor exception to this
observation were the compounds 1,1-dichloroethane and cis-1,2-dichloroethene,
which were reported in November 2018 above the laboratory reporting limits but well
below the established NC 2B Surface Water Standards. The compound 1,4-dioxane
has been reported in surface water sample SW-3 during the past three water quality

monitoring events conducted during the 2-year performance evaluation period. The
reported 1,4-dioxane concentrations are likely influenced by the upstream surface
water quality, as noted above in the discussion of surface water station SW-5. The
1,4-dioxane concentrations observed in surface water sample SW-3 closely mimic the
concentrations reported in upstream surface water sample SW-5.
• Station SW-4: This surface water monitoring station is located downstream of both
the former Seaboard facility and the Landfill. Surface water sample SW-4 is collected
at the end of the piped section of the Southern Intermittent Stream at the point of
discharge to the sediment basin. This sediment basin has also been observed to
receive leachate discharge from the surrounding Landfill slopes and underdrains. As
a result, the water quality data observed at this surface water sample location has been
highly variable and rainfall dependent. For example, the surface water sample
collected in November 2018, after two hurricanes passed through the area, indicated
relatively low concentrations of VOCs and 1,4-dioxane. Conversely, the surface
water sample collected in September 2019, after an extended period of zero rainfall,
reported elevated VOCs and 1,4-dioxane concentrations. While these variations do
not appear to impact the water quality observed in Randleman Lake, efforts are
underway to better determine and evaluate the relationship between surface water
flow in the Southern Intermittent Stream area and leachate generation from the former
Landfill.
Northern Intermittent Stream
The flow path of the Northern Intermittent Stream was re-routed in 2011 and no longer
passes through a pipe beneath the Landfill. Due to a limited watershed area, these two
surface water monitoring stations are typically dry except during periods of heavy rainfall.
The Northern Intermittent Stream surface water sampling stations include:
• SW-1: Upstream sample collected from the Northern Intermittent Stream
• SW-2: Downstream sample collected from the Northern Intermittent Stream
-29-

As discussed above, the Northern Intermittent Stream is normally dry during the water
quality monitoring events and little historical data is available. A sample was collected
from the two surface water monitoring stations on the Northern Intermittent Stream in
November 2018, after the two hurricanes passed through the area. The November 2018
surface water samples did not report any VOC concentrations above the laboratory
reporting limits. The compound 1,4-dioxane was reported in both surface water samples
at concentrations exceeding the laboratory reporting limits and the NC Protective Value.
5.0 Conclusions / Recommendations
The Remedial Monitoring and Effectiveness Evaluation Plan provided the framework to monitor,
document and evaluate system operations and performance over a two-year period following
NCDEQ's approval of the completion of remedial system construction. This data, which is
summarized in this document and has been previously submitted to the department in the form of
quarterly progress reports and Annual Water Quality Monitoring Reports, has been evaluated with
respect to the Remedial Action Objectives for the Site. The following provides the conclusions
and recommendations of that evaluation:
Contain the contaminated soils at the source areas to prevent direct contact by potential
human and environmental receptors, reduce percolation and intrusion of storm water and
reduce migration of compounds of concern ("COCs") into the groundwater.
CONCLUSION — Both properties have been closed pursuant to approved closure plans that restrict
contact with potential human and environmental receptors and are part of routine O&M that
includes scheduled inspections. Both properties are enclosed (fenced) to restrict unauthorized
K11KK.4X3
RECOMMENDATION — Continue routine inspections and address issues as identified. Provide
written documentation when inspections are conducted and include in weekly reports. Evaluate
the need for additional fencing along access roads to further restrict access to the properties.
-30-

Control migration of landfill leachate to prevent discharge to surface water at the Site.
CONCLUSION — Landfill leachate is collected from the five leachate tanks and the Northern
Intermittent Stream sump and then is processed through the Site's treatment system. The leachate
collection system has processed on average 4.2 million gallons of liquid (presumed to be leachate
and water) per year. This is significantly more liquid than was anticipated to be collected through
the leachate system at the time the remedy was designed.
RECOMMENDATION — Continue to collect and process leachate from the established collection
system to prevent water quality impacts to groundwater and surface water at the Site. Further
evaluate and assess the liquids collected in the leachate system to determine if the additional liquids
are in fact leachate from the landfill or clean water infiltrating from other areas. The evaluation
will include evaluation of approaches to minimize and segregate leachate.
Control migration of contaminated groundwater at the site to prevent offsite migration and
unacceptable impacts to surface water.
CONCLUSION - The current groundwater extraction system at PW-DR1 maintains a capture zone
which is effectively containing the primary contaminant plume discharging through the Southern
Intermittent Stream valley. The lower -volume shallow extraction wells, located at the Northern
Intermittent Stream, Southern Intermittent Stream, and along the eastern boundary of the Landfill,
are controlling shallow groundwater discharge to prevent impacts to surface water at the Site.
RECOMMENDATION — Continue to operate the groundwater extraction systems to maintain the
established capture zones to minimize impacts to Site surface water.
Achieve compliance with North Carolina surface water quality standards for the COCs in
the surface water of the onsite streams.
CONCLUSION — Surface water quality has improved at the Site as noted from the reduction in
volatile organic compounds reported in samples collected from the on -site streams. 1,4-dioxane
-31-

has been detected in surface water at the Site, primarily from samples collected along the Southern
Intermittent Stream.
RECOMMENDATION — Additional activities are underway to evaluate the relationship between
surface water flow in the Southern Intermittent Stream, leachate collection, and shallow
groundwater migration from areas of the former Landfill.
Achieve compliance with North Carolina groundwater quality standards for the COCs in
the groundwater beneath the Site.
CONCLUSION — The results of groundwater monitoring activities have shown contaminant
concentrations consistent with historical water quality data. The groundwater extraction system
provides for containment of contaminant migration and reduction of contaminant mass through
treatment of extracted groundwater. As presented in Tables 1, 2, and 3 of this report, the remedial
system has been effective in removing contaminant mass from the extracted groundwater.
RECOMMENDATION - Continue annual water quality monitoring at the Site to evaluate the
effectiveness of the treatment system and containment of the contaminant plume.
Restrict future Site uses that could present potentially unacceptable exposure risks (e.g.,
residential development, use of impacted groundwater, etc.).
CONCLUSION — The requirements of the Declarations of Perpetual Land Use Restrictions
("DPLUR") for the Landfill and the former Seaboard Chemical facility are complied with and are
reviewed and certified annually.
RECOMMENDATION — Continue to comply with and perform annual review of restrictions
pursuant to the DPLURs
-32-

TIRE:
Site Location leap
Seaboard/Riverdale LF Site
Jamestown, North Carolina
Babb & Associates, P.A.
MGM W. W"..• PAWECT NO.
Figure 1 1 "= 8000'
CHECKM ■r. AU*W or- WE
G. Babb 2/10/11

500 FT
SOURCE: GUILFORD COUNTY GIS
SITE VICINITY MAP FIGURE
ERM NC PC FORMER SEABOARD CHEMICAVRIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA L
ERM

LIFT
STATION I
L� is V 111s l �l
LCHT-1 LCHT-2 LCHT-3 LCHT-4 LCHT-5 LIIMUMP
fLEACHATE COLLECTION TANKS
�09 pRyGyE
TAI V C4
T-121
RW-LFS1 RW-LFS2 RW-SIS1 RW-NISI
(SHALLOW) (SHALLOW) (SHALLOW) (SHALLOW)
GI'OOUNDU'v/\TEP. hE'OOV'Lf'Y �.1%GELS
(SHALLOW) (SHALLOW) (SHALLOW)
LIME F®CI3
CLARIFIER
T-701
EQ
TANK
T-703
SLUDGE
DRYING
SO�CES
PC ER
T-702
(LIFT STATION 2
LS-2
L=Mlllllllllll
.�0
RECYCLE
LIFT STl�TION 2
LS-2
WATER, ®, � FLT(INTER TBB N YY
PB14MeH WA VIA@@T{ppgqER
TANK
T�10 T 400
am

W— 1
HW-W or
PRAYER
FORMER BURN
PITS AREA
Cr�&IN/SE I
—SOIL RESIDUE
M-154 MOUND
MAMMAL
RECKLM
FAQUTY
SW-5
A
0
BASE MAP FROM BBL REMEDIAL INVESTIGATION
REPORT. MARCH 1999.
I
FORAIER
SEABOARD
C,M3W L
.4
cavv"Im
CITY -
MAINTENANCE
GARAGE
SW-6
SW-2 13500' Upstream DPW-18
M W— 1 2A�
MW-1 28
M W— 1 2t---- P W— 16 D
W— 1 4D+
PW-15D
S........
—6
*P W— 131 ow D R2.
MW-3C
PW-5DASW-4 W—DR3 ....
...
SW-3
A
4 A OW—LFS2
P W-z3D \ � .
PW-41
F) W—' S F 1
RIWRDALE DMW "NDRU
PDW—1 OD ......
PW-121
WASWWA70? . . .
7RFAYAOVT
PL4NT
110-0 it
0 z 4�� - v w F)
/ � o
SW—DRP11 SCALE IN FEET
,100' Downstream 75 150 300

m�
BASE MAP FROM BBL REMEDIAL INVESTIGATION
REPORT, MARCH 1999.
SW-6 LOCATED AT UPSTREAM
SIB BRl Er DRIVE
u
7141
I
'110M ERN
RW-NIS1 R NTERM/TTENT
``��■■ STREAM
NIS-LCH
/ I
l
i I
I \�
LCHT-3
\ e Am'p
1 * RW
LCHT-5
\f,
LCHT
RW-LFS2 / �
RIVERDALE DRIVE LANDFILL
LEGEND
!Q MONITORING WELL (BEDROCK)
• MONITORING WELL (SAPROLITE/PWR)
O LEAC.. MONITORING WELL
W/e EASTING MANHOLE
® RECOVERY WELL (SAPROUTE/SB)
♦ SURFACE WATER SAMPLE
a SURFACE WATER AND
PIEZOMETER SAMPLE
NO NOT DETECTED
NS NOT SAMPLED
CONCENTRATIONS IN
MICROGRAMS PER LITER (ug/L)
` ESTIMATED CAPTURE ZONE
OF RECOVERY WELLS
I
RW/PW = Recovery Well
LCHT = Leachate Collection Point
N
SCALE IN FEET
0 75 150 300

MW-12A \ I
MW-12BI
MW-12D f
/ \ PW-. 83
/ PW16
I PW-14D 6 .51
% �20 570.89 �l /
PW-14S
683.96 '1 ..._...�
681.67 \
PW-15D 4 PW-15S ...—..._..._... \.
678.66 681.
680
-9'-721.80
P W 6 D
6 .10
�... ... -SW-DRP2.'�. j PW-61 I i
— ..._.
665 .... i 615
W-131
81.62 OW-DR2 - 4%"—..._... _.._
672.46
0 0 R4 0 II
72. ' -/P Vl� D 1 0
72.2 ' ' ` - ` --
' DR1
P 5D67 1 ` OW-DR3 ` \\
R AS - -
683.29
` R IS1 0 0 \ \
` W \\
` \\ 15.1
/ v
co
----/M W I�
M W- \\ >>0 �` I
IIII �\\\\\ \ II •I•
Q�V- FS2 .1
e 6�9. 7
/
SCALE IN FEET
0 35 70 140
FIGURE
O
_� APPROXIMATE EXTRACTION WELL CAPTURE ZONE
FORMER SEABOARD CHEMICAL/RIVERDALE DRIVE LF
Babb & Associates, P.A. JAMESTOWN, NORTH CAROLINA

740
—73�
/76'
31;
:............
.rt........._99
. ........... ......... ...
i .
._..: OW—LFS2
...
�� `� PW-41 \ �\ \
�(720)
HOUSE
PRAYER / p (74) I
RIVERDALE DRIVE LANDFILL ^,.(292^^ \ \ .
BASE MAP FROM BBL REMEDIAL INVESTIGATION
REPORT, MARCH 1999.
FORNMR
SEABOARD
CORPORA NON
Babb & Associates, P.A.
GROUND WATER QUALITY —BEDROCK AQUIFER
TOTAL VOCS—SEPTEMBER 2019
FORMER SEABOARD CHEMICAL/RIVERDALE DRIVE LF
JAMESTOWN, NORTH CAROLINA
N
SCALE IN FEET
75 150 300
FIGURE

Table 1
Contaminant Removal Efficiency
Percent Contaminant Removal *
Year
1,4-Doxane
Chlorinated
Ethenes
Chlorinated
Ethanes
Other
Contaminants
Total
Mass
Step 1
2018
2.6
97.6
97.8
96.5
82.4
2019
<
99.2
99.1
98.8
86.2
Step2
2018
89.1
100
98.8
91.6
90.1
2019
93.5
100
100
88.5
93.3
Overall Contaminant Removal (%)
2018
90.8
100
99.95
99.7
97.3
2019
92.4
100
100
99.8
99.1
* The annual percent contaminant removal efficiency for Steps 1 and
2, and the overall removal efficiency for the various classes of
contaminants is compared for 2018 and 2019

Table 2
Contaminant Mass Removal
Year
Step in
water
treatment
process
Volume
6
(X10 )
Total Mass (Kg)
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
Influent
8.7
30.3
72.1
41.9
48.1
192
2018
Effluent
29.5
1.67
0.92
1.69
33.8
Drainage
3.2
ND
0.0114
0.141
3.3
Influent
10.9
31.0
110.1
53.9
70.2
265
2019
Effluent
34.6
0.85
0.48
0.79
36.4
Drainage
2.2
ND
ND
0.092
2.43
2018-
Influent
19.6
61.3
182.2
95.8
118.3
457.6
2019
Effluent
64.1
2.5
1.4
2.48
70.5
Totals
Drainage
5.4
ND
0.0114
0.233
5.6
* Annual and two-year total influent volumes and contaminant masses treated via the Seaboard
system.

Table 3
Seasonal 1,4-Dioxane Removal
Percent 1,4-Dioxane
Removal
Q1
Q2
Q3
Q4
2018
90.4
84.5
96.6
84.0
2019
87.9
93.6
97.7
93.7
Average
89.2
89.1
97.2
88.9
* Seasonality of dioxane removal (phytovolatilization) efficiency
(Step 2 in the water treatment process). Quarterly percent dioxane
removal for 2018 and 2019 and grand average for the two years.

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 1 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
MW-1
57.71
47.71-57.71
743.98-733.98
789.40
791.69
11/14/2000
27.28
764.41
9/4/2001
27.99
763.70
9/17/2002
29.55
762.14
9/11/2003
23.86
767.83
8/16/2004
25.70
765.99
12/19/2005
25.55
766.14
8/21/2006
25.97
765.72
9/24/2007
26.33
765.36
2/23/2009
25.35
766.14
3/29/2010
24.89
765.72
11/1/2011
27.69
764.00
11/16/2012
27.23
764.46
12/9/2013
28.36
763.33
12/8/2014
28.54
763.15
New Survey
788.85
790.46
10/26/2015
27.99
763.47
11/14/2016
27.50
762.96
10/11/2017
28.43
762.03
11/1/2018
29.70
760.76
9/10/2019
24.78
765.68
MW-2A
19
4-19
709.9-694.9
711.80
713.90
11/14/2000
13.46
700.44
9/4/2001
17.43
696.47
9/17/2002
10.25
703.65
9/11/2003
10.60
703.30
8/16/2004
7.83
706.07
8/21 /2006
13.04
700.86
9/24/2007
14.17
699.73
2/23/2009
10.67
703.23
3/29/2010
6.11
707.79
11/1/2011
8.18
705.72
11/16/2012
12.90
701.00
MW-26
30
30
681.0
711.00
712.57
11/14/2000
12.78
699.79
9/4/2001
13.01
699.56
9/17/2002
10.61
701.96
9/11/2003
10.62
701.95
8/16/2004
7.75
704.82
8/21 /2006
12.25
700.32
9/24/2007
14.64
697.93
2/23/2009
10.35
702.22
3/29/2010
6.05
706.52
11/1/2011
9.16
703.41
1 /16/2012
12.21
700.36
MW-2C
48
28-48
685.56-665.56
711.40
713.56
11/14/2000
16.12
697.44
9/4/2001
14.02
699.54
9/17/2002
18.41
695.15
9/11/2003
12.78
700.78
8/16/2004
14.80
698.76
12/19/2005
NM
NM
8/21 /2006
17.53
696.03
9/24/2007
16.86
696.70
2/23/2009
14.25
699.31
3/29/2010
10.97
702.59
11/1/2011
14.55
699.01
11/16/2012
15.82
697.74

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 2 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
MW-3A
27
12-27
682.4-667.4
692.74
694.40
11/14/2000
19.62
674.78
9/4/2001
21.03
673.37
9/17/2002
20.22
674.18
9/11/2003
16.74
677.66
8/16/2004
18.60
675.80
12/19/2005
18.54
675.86
8/21/2006
20.32
674.08
9/24/2007
17.18
677.22
2/23/2009
11.00
683.40
3/29/2010
10.92
683.48
11 /1 /2011
12.34
682.06
11/16/2012
11.87
682.53
MW-36
38.83
28.83-38.83
664.76-654.76
692.32
693.59
11/14/2000
19.46
674.13
9/4/2001
21.00
672.59
9/17/2002
20.00
673.59
9/11/2003
16.32
677.27
8/16/2004
NM
NM
12/19/2005
18.81
674.78
8/21/2006
20.33
673.26
9/24/2007
16.59
677.00
2/23/2009
8.48
685.11
3/29/2010
8.04
685.55
11 /1 /2011
11.27
682.32
11/16/2012
11.00
682.59
MW-3C
57
47-57
647.22-637.22
691.90
694.22
11/14/2000
19.51
674.71
9/4/2001
21.12
673.10
8/19/2002
20.57
673.65
9/16/2002
20.00
674.22
9/11/2003
16.47
677.75
8/16/2004
18.46
675.13
12/19/2005
18.96
674.63
8/21/2006
20.56
673.03
9/24/2007
16.50
677.72
2/23/2009
10.15
683.44
3/29/2010
7.86
685.73
11 /1 /2011
10.33
683.89
11/16/2012
10.88
683.34
12/11/2013
10.54
683.68
12/11/2014
20.74
673.48
New Survey
692.50
692.74
10/27/2015
17.68
675.06
11/14/2016
9.90
682.84
10/9/2017
20.46
672.28
11 /2/2018
18.31
674.43
9/11/2019
18.00
674.74

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 3 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
MW-4
30
20-30
664.72-654.72
683.20
684.72
11/14/2000
12.22
672.50
9/4/2001
14.18
670.54
9/ 16/2002
12.71
672.01
9/11/2003
10.62
674.10
8/16/2004
11.91
672.81
12/19/2005
17.55
667.17
8/21/2006
NM
NM
9/24/2007
13.22
671.50
New TOC elevation
683.87
687.29
2/23/2009
8.02
679.27
3/29/2010
6.25
681.04
11/1/2011
6.48
680.81
11/16/2012
7.01
680.28
MW-5
30
20-30
664.4-654.4
682.00
684.40
11/14/2000
12.89
671.51
9/4/2001
14.69
669.71
9/ 16/2002
13.81
670.59
9/11/2003
9.23
675.17
8/16/2004
12.05
672.35
12/19/2005
16.59
667.81
8/21/2006
NM
NM
9/24/2007
13.98
670.42
New TOC elevation;
survey data pending
2/23/2009
5.82
NA
3/29/2010
4.63
NA
11/1/2011
6.18
NA
11/16/2012
6.61
NA
MW-6
110
100-110
661.73-651.73
759.60
761.73
11/14/2000
65.92
695.81
9/4/2001
66.49
695.24
9/17/2002
67.21
694.52
9/11/2003
59.32
702.41
8/16/2004
63.47
698.26
12/19/2005
65.83
695.90
8/21/2006
66.46
695.27
9/24/2007
67.11
694.62
2/23/2009
62.58
699.15
3/29/2010
60.55
701.18
11/1/2011
64.36
697.37
11/16/2012
64.60
697.13
12/11/2013
64.88
696.85
12/12/2014
65.80
695.93
New Survey
759.74
761.47
10/30/2015
64.89
696.58
11/17/2016
64.38
697.09
10/10/2017
65.03
696.44
11 /2/2018
61.20
700.27
9/12/2019
62.28
699.19

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 4 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
MW-7A
35
15-35
726.64-706.64
739.42
741.64
11/14/2000
31.10
710.54
9/4/2001
32.34
709.30
9/17/2002
35.73
705.91
9/11/2003
22.61
719.03
8/16/2004
29.02
712.62
12/19/2005
31.13
710.51
8/21 /2006
31.19
710.45
9/24/2007
30.55
711.09
2/23/2009
28.23
713.41
3/29/2010
23.65
717.99
11/1/2011
30.61
711.03
11/16/2012
30.60
711.04
MW-713
68
58-68
682.16-672.16
738.50
740.16
11/14/2000
33.90
706.26
9/4/2001
33.15
707.01
9/17/2002
38.12
702.04
9/11/2003
24.53
715.63
8/16/2004
31.80
708.36
12/19/2005
33.74
706.42
8/21 /2006
33.36
706.80
9/24/2007
33.31
706.85
2/23/2009
30.18
709.98
3/29/2010
25.67
714.49
11/1/2011
27.93
712.23
11/16/2012
30.00
710.16
MW-8
33
13-33
721.16-701.16
731.80
734.16
11/14/2000
>30.70
-
9/4/2001
>30.70
9/17/2002
>30.70
-
9/11/2003
20.49
719.67
8/16/2004
28.35
711.81
12/19/2005
20.22
719.94
8/21 /2006
30.81
709.35
9/24/2007
32.89
701.27
2/23/2009
26.39
713.77
3/29/2010
20.51
719.65
11/1/2011
28.85
705.31
11/16/2012
30.96
703.20
MW-9
32
12-32
676.95-656.95
685.95
688.95
11/14/2000
12.36
9/4/2001
13.53
675.42
9/16/2002
13.48
675.47
9/11/2003
8.15
680.80
8/16/2004
10.78
678.17
12/19/2005
11.43
677.52
8/21 /2006
21.35
667.60
9/24/2007
NM
NM
2/23/2009
5.37
683.58
3/29/2010
4.22
684.73
11/1/2011
5.97
682.98
11/16/2012
6.26
682.69

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 5 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
MW-10
28
8-28
687.62-667.62
693.60
695.62
11/14/2000
16.91
678.71
9/4/2001
18.61
677.01
9/16/2002
17.64
677.98
9/11/2003
13.78
681.84
8/16/2004
15.06
680.56
12/19/2005
14.47
681.15
8/21 /2006
16.80
678.82
9/24/2007
17.29
678.33
2/23/2009
11.92
683.70
3/29/2010
10.57
685.05
11 /1 /2011
12.96
682.66
11/16/2012
13.18
682.44
12/10/2013
12.97
682.65
12/10/2014
13.97
681.65
New Survey
693.24
695.01
10/26/2015
12.59
682.42
11/14/2016
12.86
682.15
10/9/2017
12.95
682.06
10/31 /2018
11.53
683.48
9/10/2019
13.40
681.61
MW-11
68
53-68
695.42-680.42
746.26
748.42
11/14/2000
38.24
710.18
9/4/2001
38.50
709.92
8/19/2002
41.06
707.36
9/16/2002
40.65
707.77
9/11/2003
28.97
719.45
8/16/2004
36.81
711.61
12/19/2005
38.51
709.91
8/21 /2006
32.91
715.51
9/24/2007
37.29
711.13
2/23/2009
28.91
719.51
3/29/2010
26.02
722.40
11/1/2011
31.13
717.29
11/16/2012
34.87
713.55
MW-12A
20
5-20
688.96-673.96
691.12
693.96
11/14/2000
15.66
678.30
9/4/2001
15.87
678.09
9/16/2002
15.62
678.34
9/11/2003
11.08
682.88
8/16/2004
14.15
679.81
12/19/2005
11.31
682.65
8/21 /2006
14.67
679.29
9/24/2007
13.92
680.04
2/23/2009
11.11
682.85
3/29/2010
9.99
683.97
11 /1 /2011
9.26
684.70
11/16/2012
11.13
682.83
12/10/2013
9.07
684.89
12/11/2014
11.58
682.38
New Survey
690.21
693.07
10/27/2015
11.15
681.92
11 /14/2016
11.01
682.06
10/9/2017
10.98
682.09
11/1/2018
10.19
682.88
9/ 10/2019
10.41
682.66

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 6 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
MW-12B
58
48-58
647-637
691.70
695.00
11/14/2000
16.49
678.51
9/4/2001
16.92
678.08
9/16/2002
16.65
678.35
9/11/2003
12.72
682.28
8/16/2004
15.03
679.97
12/19/2005
14.12
680.88
8/21/2006
NM
NM
9/24/2007
NM
NM
2/23/2009
10.95
684.05
3/29/2010
NM
NM
11/1/2011
10.25
684.75
11/16/2012
10.81
684.19
12/10/2013
11.55
683.45
12/11/2014
11.65
683.35
New Survey
690.75
693.86
10/27/2015
10.67
683.19
11/14/2016
10.23
683.63
10/ 10/2017
11.21
682.65
11 /1 /2018
10.22
683.64
9/11/2019
10.76
683.10
MW-12D
202
187-202
507.93-492.93
691.81
694.93
11/14/2000
>101.50
<593
9/4/2001
48.12
646.81
9/16/2002
47.59
647.34
9/11/2003
46.06
648.87
8/16/2004
NM
NM
12/19/2005
20.80
674.13
8/21/2006
NM
NM
9/24/2007
14.24
680.69
2/23/2009
9.43
685.50
3/29/2010
12.62
682.31
11/1/2011
13.88
681.05
11/16/2012
43.06
651.87
12/10/2013
25.34
669.59
12/11/2014
43.02
651.91
New Survey
691.19
694.21
10/29/2015
21.96
672.25
11/18/2016
24.12
670.09
10/11/2017
53.41
640.80
11 /1 /2018
26.84
667.37
9/12/2019
3.25
690.96
MW-14
35
20-35
746.22-731.22
763.80
766.22
11/14/2000
28.42
737.80
9/4/2001
29.33
736.89
9/17/2002
NM
NM
9/11/2003
25.38
740.84
8/16/2004
26.16
740.06
8/21/2006
27.98
738.24
2/23/2009
27.27
738.95
3/29/2010
25.71
740.51
11/1/2011
27.86
738.36
11/16/2012
27.61
738.61

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 7 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
MW-15A
34
19-34
731.34-746.34
762.5
765.34
9/4/2001
26.70
738.64
9/17/2002
21.40
743.94
9/11/2003
NM
NM
8/16/2004
22.72
742.62
12/19/2005
24.31
741.03
8/21/2006
NM
NM
2/23/2009
15.21
750.13
3/29/2010
22.06
743.28
11/1/2011
25.19
740.15
11/16/2012
24.75
740.59
12/10/2013
24.69
740.65
12/8/2014
25.64
739.70
New Survey
762.57
764.33
10/27/2015
24.46
739.87
11/14/2016
27.01
737.32
10/11/2017
27.90
736.43
10/31/2018
22.72
741.61
9/10/2019
22.58
741.75
MW-16
45
30-45
749.13-734.13
779.00
779.13
11/14/2000
34.18
744.95
9/4/2001
NM
NM
9/17/2002
NM
NM
9/11/2003
NM
NM
8/16/2004
NM
NM
12/19/2005
NM
NM
8/21/2006
NM
NM
2/23/2009
NM
NM
11/16/2012
NM
NM
MW-17 (WSW-1)
250
230-250
12/19/2005
68.09
8/21/2006
NM
NM
2/23/2009
66.04
3/29/2010
64.30
11 /1 /2011
66.88
11/16/2012
67.34
NM
MRF-1
43.5
28.5-43.5
723.31-708.31
752.10
751.81
11/14/2000
8.45
743.36
9/4/2001
8.48
743.33
9/17/2002
8.56
743.25
9/11/2003
7.40
744.41
8/16/2004
7.59
744.22
12/19/2005
7.63
744.18
8/21/2006
8.25
743.56
9/24/2007
8.87
742.94
2/23/2009
7.56
744.25
3/29/2010
7.55
744.26
11 /1 /2011
8.01
743.80
11/16/2012
7.98
743.83

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 8 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
MRF-2
41.5
26.5-41.5
724.23-709.23
751.00
750.73
11/14/2000
26.06
724.67
9/4/2001
26.18
724.55
9/17/2002
26.10
724.63
9/11/2003
24.28
726.45
8/16/2004
24.10
726.63
12/19/2005
24.35
726.38
8/21/2006
25.69
725.04
9/24/2007
25.69
725.04
2/23/2009
25.22
725.51
3/29/2010
24.73
726.00
11/1/2011
25.18
725.55
11/16/2012
25.30
725.43
OW-DR1
165
49-165
648.95-532.95
695.39
697.95
11/14/2000
23.21
674.74
9/4/2001
24.72
673.23
9/16/2002
23.80
674.15
9/11/2003
20.21
677.74
8/16/2004
22.23
675.72
12/19/2005
22.91
675.04
8/21/2006
24.40
673.55
9/24/2007
20.16
677.79
2/23/2009
13.77
684.18
3/29/2010
11.42
686.53
11 /1 /2011
13.95
684.00
11/16/2012
14.64
683.31
OW-DR2
186
176-186
518.4-508.4
692.61
694.40
11/14/2000
19.72
674.68
9/4/2001
21.33
673.07
8/19/2002
20.75
673.65
9/16/2002
20.25
674.15
9/11/2003
16.60
677.80
8/16/2004
18.62
675.78
12/19/2005
19.34
675.06
8/21/2006
20.79
673.61
9/24/2007
16.52
677.88
2/23/2009
10.13
684.27
3/29/2010
7.97
686.43
11 /1 /2011
10.32
684.08
11/16/2012
10.90
683.50
12/10/2013
10.55
683.85
12/12/2014
27.31
667.09
New Survey
692.22
695.87
10/30/2015
13.53
682.34
11/18/2016
14.28
681.59
10/ 10/2017
16.31
679.56
11 /2/2018
19.59
676.28
9/11/2019
20.24
675.63

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 9 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
OW-DR3
160
77-160
626.52-543.52
703.52
704.75
8/19/2002
30.79
663.61
9/16/2002
30.40
664.00
9/11/2003
27.80
666.60
8/16/2004
29.02
665.38
12/19/2005
30.29
664.11
8/21 /2006
31.17
663.23
9/24/2007
26.32
678.43
2/23/2009
20.17
684.58
3/29/2010
18.61
686.14
11/1/2011
20.45
684.30
11/16/2012
20.75
684.00
12/10/2013
20.99
683.76
OW-DR4
165
45 - 165
667.70-547.70
712.70
713.85
8/19/2002
40.15
673.70
9/16/2002
39.72
674.13
9/11/2003
36.25
677.60
8/16/2004
38.23
675.62
12/19/2005
38.91
674.94
8/21 /2006
40.34
673.51
9/24/2007
35.99
677.86
2/23/2009
29.64
684.21
3/29/2010
22.30
691.55
11/1/2011
29.83
684.02
11/16/2012
30.30
683.55
OW-DR5
40
20-40
12/19/2005
10.50
--
2/23/2009
NM
3/29/2010
NM
11/1/2011
NM
11/16/2012
NM
NM
OW-NIS1
40
25-40
12/19/2005
10.91
2/23/2009
8.40
3/29/2010
7.59
11/1/2011
6.40
11/16/2012
7.54
OW-SIS1
39
20-39
12/19/2005
24.05
8/21 /2006
24.08
9/24/2007
23.89
2/23/2009
20.89
3/29/2010
17.69
11/1/2011
22.98
11/16/2012
22.99
OW-SIS2
40
20-40
12/19/2005
5.32
2/23/2009
4.32
3/29/2010
3.29
11/1/2011
3.74
11/16/2012
7.63
OW-SIS3
45
15-45
12/19/2005
5.80
2/23/2009
5.67
3/29/2010
3.61
11/1/2011
5.22
11/16/2012
7.00

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 10 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
OW-SF1
120
95-120
638.15-613.15
731.06
731.06
12/19/2005
26.15
704.91
8/21/2006
26.00
705.06
9/24/2007
25.84
705.22
2/23/2009
23.03
708.03
3/29/2010
18.64
712.42
11/1/2011
25.39
705.67
11/16/2012
25.22
705.84
OW-SF2
120
80-120
651.05-611.05
728.87
731.05
8/21/2006
NM
NM
9/24/2007
20.44
710.61
2/23/2009
18.47
--
3/29/2010
14.27
716.78
11/1/2011
20.46
710.59
11/16/2012
20.68
710.37
OW-LFS1
50
30-50
698.74
12/19/2005
17.15
681.59
2/23/2009
14.45
684.29
3/29/2010
13.28
685.46
11/1/2011
14.90
683.84
11/16/2012
15.88
682.86
OW-LFS2
50
30-50
700.08
12/19/2005
21.97
678.11
2/23/2009
15.81
684.27
3/29/2010
14.66
685.42
11/1/2011
16.34
683.74
11/16/2012
16.61
683.47
12/11/2013
16.82
683.26
12/12/2014
17.44
682.64
New Survey
696.69
699.45
10/26/2015
16.48
682.97
11/14/2016
20.12
679.33
10/9/2017
25.57
673.88
10/31/2018
38.96
660.49
9/12/2019
17.20
682.25
PW-DR1
185
38-185
657.21-510.21
693.62
695.21
11/14/2000
20.51
674.70
9/4/2001
21.90
673.31
8/19/2002
21.48
673.73
9/16/2002
21.02
674.19
9/11 /2003
17.51
677.70
8/16/2004
19.55
675.66
12/19/2005
NM
--
8/21/2006
NM
9/24/2007
NM
2/23/2009
NM
3/29/2010
NM
11/1/2011
NM
11/16/2012
NM

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 11 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
PW-SF1
120
95-120
638.15-613.15
732.14
733.15
8/21/2006
25.98
707.17
9/24/2007
25.60
707.55
2/23/2009
22.96
710.19
3/29/2010
18.62
714.53
11 /1 /2011
25.31
707.84
11/16/2012
25.50
707.64
12/9/2013
21.00
712.15
12/8/2014
26.65
706.50
New Survey
731.13
732.19
10/27/2015
26.78
705.41
11/17/2016
24.45
707.74
10/11/2017
28.21
703.98
10/31 /2018
22.17
710.02
9/10/2019
20.50
711.69
PW-SIS1
39
19-39
695.21
8/16/2004
NM
--
12/19/2005
12.20
683.01
8/21/2006
13.95
681.26
9/24/2007
15.43
679.78
2/23/2009
12.73
682.48
3/29/2010
11.31
683.90
11 /1 /2011
13.01
682.20
11/16/2012
13.63
681.58
PW-1D
81.5
66.5-81.5
717.18-702.18
781.90
783.68
11/14/2000
54.92
728.76
9/4/2001
54.60
729.08
9/17/2002
54.65
729.03
9/11/2003
47.49
736.19
8/16/2004
NM
--
12/19/2005
51.82
731.86
8/21/2006
NM
--
2/23/2009
49.60
734.08
3/29/2010
47.86
735.82
11 /1 /2011
50.18
733.50
11/16/2012
50.30
733.38
PW-2D
101
80-100
700.55-680.55
778.80
780.55
11/14/2000
45.43
735.12
9/4/2001
45.16
735.39
9/17/2002
NM
--
9/11/2003
NM
--
8/16/2004
43.45
737.10
12/19/2005
43.94
736.61
8/21/2006
42.75
737.80
9/24/2007
44.20
736.35
2/23/2009
41.43
739.12
3/29/2010
39.30
741.25
11 /1 /2011
42.62
737.93
11/16/2012
42.20
738.35

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 12 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
PW-3D
209.5
179.5-209.5
578.84-548.84
756.60
758.34
11/14/2000
56.60
701.74
9/4/2001
NM
--
9/16/2002
58.62
699.72
9/11/2003
NM
--
8/16/2004
55.55
702.79
12/19/2005
NM
--
8/21/2006
56.75
701.59
2/23/2009
50.02
708.32
3/29/2010
48.12
710.22
11 /1 /2011
50.52
707.82
11/16/2012
47.90
710.44
12/17/2013
48.81
709.53
12/11/2014
49.51
708.83
New Survey
737.63
738.60
10/29/2015
48.91
689.69
11/16/2016
52.42
686.18
10/11/2017
43.99
694.61
11 /2/2018
50.71
687.89
9/11/2019
52.02
686.58
PW-41
122
112-122
625.67-615.67
735.17
737.67
11/14/2000
43.39
694.28
9/4/2001
44.73
692.94
9/17/2002
45.94
691.73
9/11/2003
36.04
701.63
8/16/2004
42.31
695.36
12/19/2005
43.27
694.40
8/21 /2006
43.11
712.03
2/23/2009
39.35
698.32
3/29/2010
35.56
719.58
11 /1 /2011
41.23
696.44
11/16/2012
41.49
696.18
12/17/2013
42.03
695.64
12/8/2014
42.62
695.05
New Survey
732.04
737.59
10/29/2015
42.10
695.49
Corrected elevation
after well repair.
Removed
2.59' of casing.
735.00
11/17/2016
40.78
694.22
10/11/2017
43.80
691.20
11 /2/2018
34.04
700.96
9/11/2019
35.52
699.48

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 13 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
PW-5D
306.5
272-282
425.87-415.87
695.07
697.87
11/14/2000
23.52
674.35
9/4/2001
24.04
673.83
8/19/2002
24.54
673.33
9/16/2002
23.86
674.01
9/11/2003
20.37
677.50
8/16/2004
22.45
675.42
12/19/2005
23.21
674.66
8/21 /2006
24.68
673.19
9/24/2007
20.31
677.56
2/23/2009
13.85
684.02
3/29/2010
10.85
687.02
11 /1 /2011
13.98
683.89
11/16/2012
12.92
684.95
12/16/2013
10.54
687.33
12/11/2014
21.86
676.01
New Survey
693.96
696.27
10/30/2015
13.80
682.47
11/18/2016
13.73
682.54
10/ 10/2017
17.41
678.86
11 /2/2018
17.31
678.96
9/11/2019
17.42
678.85
PW-61
76
65-76
619.19-608.19
682.27
684.19
11/14/2000
11.80
672.39
9/4/2001
13.98
670.21
8/ 19/2002
12.81
671.38
9/16/2002
12.35
671.84
9/11/2003
11.20
672.99
8/16/2004
12.00
672.19
12/19/2005
16.14
668.05
8/21/2006
NM
--
9/24/007
NM
--
New TOC elevation
693.57
696.15
2/23/2009
14.75
681.40
3/29/2010
11.76
684.39
11/1/2011
13.98
682.17
11/16/2012
14.26
669.93
12/16/2013
14.29
681.86
New well
12/10/2014
17.43
679.98
New Survey
100
90-100
695.12
697.41
10/27/2015
16.15
681.26
11/17/2016
16.54
680.87
10/10/2017
17.38
680.03
11/1/2018
15.47
681.94
9/12/2019
16.00
681.41

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 14 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
PW-6D
275
260-275
424.77-409.77
682.22
684.77
11/14/2000
11.01
673.76
9/4/2001
12.58
672.19
8/19/2002
12.07
672.70
9/16/2002
11.57
673.20
9/11/2003
7.87
676.90
8/16/2004
9.95
674.82
12/19/2005
13.24
671.53
8/21/2006
NM
--
9/24/2007
NM
--
New TOC elevation
691.53
696.33
3/12/2009
13.05
683.28
3/29/2010
11.84
684.49
11 /1 /2011
13.34
682.99
11/16/2012
14.03
682.30
12/16/2013
NA
NA
New well
12/10/2014
23.56
673.23
New Survey
300
270-300
695.02
696.79
10/30/2015
14.53
682.26
11/17/2016
15.02
681.77
10/10/2017
21.65
675.14
11 /1 /2018
17.33
679.46
9/12/2019
18.44
678.35
PW-71
101
90-100
594.92-584.92
683.42
684.92
11/14/2000
12.90
672.02
9/4/2001
14.58
670.34
6/ 16/2002
12.81
672.11
8/19/2002
13.28
671.64
9/ 16/2002
12.81
672.11
9/11/2003
11.69
673.23
8/16/2004
12.92
672.00
12/19/2005
11.41
673.51
8/21 /2006
14.38
670.54
9/24/2007
9.11
675.81
New TOC elevation;
survey data pending
2/23/2009
2.34
NA
3/29/2010
1.89
NA
11/1/2011
1.85
NA
11/16/2012
2.99
NA
PW-8S
48
35-45
728.13-718.13
761.23
763.13
11/14/2000
42.30
720.83
9/4/2001
45.10
718.03
9/17/2002
47.33
715.80
9/11/2003
38.95
724.18
8/16/2004
40.70
722.43
12/19/2005
42.80
720.33
8/21 /2006
43.39
719.74
9/24/2007
44.57
718.56
2/23/2009
41.66
721.47
3/29/2010
27.22
735.91
11 /1 /2011
40.58
722.55
11/16/2012
40.96
722.17

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 15 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
PW-91
100
80-100
619.07-599.07
698.07
699.07
11/14/2000
21.80
677.27
9/4/2001
22.95
676.12
9/16/2002
22.74
676.33
9/11/2003
18.04
681.03
8/16/2004
20.50
678.57
12/19/2005
20.79
678.28
8/21 /2006
11.75
687.32
9/24/2007
21.14
677.93
2/23/2009
14.18
684.89
3/29/2010
13.50
685.57
11 /1 /2011
14.61
684.46
11/16/2012
15.18
683.89
PW-101
100
80-100
616.44-596.44
695.34
696.44
11/14/2000
17.24
679.20
9/4/2001
19.08
677.36
9/16/2002
18.30
678.14
9/11/2003
14.57
681.87
8/16/2004
16.05
680.39
12/19/2005
15.53
680.91
8/21 /2006
17.68
678.76
9/24/2007
17.44
679.00
2/23/2009
12.06
684.38
3/29/2010
10.62
685.82
11/1/2011
12.32
684.12
11/16/2012
13.37
683.07
12/11/2013
13.10
683.34
12/ 10/2014
14.21
682.23
New Survey
694.63
695.97
10/29/2015
12.43
683.54
11/17/2016
13.46
682.51
10/9/2017
14.19
681.78
11 /1 /2018
11.68
684.29
9/12/2019
13.20
682.77
PW-10D
200
185-200
512.75-497.75
695.48
697.96
11/14/2000
>101.50
-
9/4/2001
39.20
658.76
9/16/2002
46.45
651.51
9/11/2003
NM
NM
8/16/2004
48.04
649.92
12/19/2005
29.01
668.95
8/21 /2006
32.60
665.36
9/24/2007
18.42
679.54
2/23/2009
14.51
683.45
3/29/2010
26.38
671.58
11 /1 /2011
17.01
680.95
11/16/2012
43.21
654.75
12/11/2013
42.25
655.71
12/10/2014
34.50
663.46
New Survey
695.13
697.26
11/3/2015
35.32
661.94
11/17/2016
25.33
671.93
10/10/2017
49.55
647.71
10/31 /2018
26.28
670.98
9/12/2019
45.70
651.56

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 16 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
PW-111
90
75-90
710.45-695.45
784.38
785.45
11/14/2000
57.55
727.90
9/4/2001
58.00
727.45
9/17/2002
58.77
726.68
9/11/2003
53.81
731.64
8/16/2004
56.23
729.22
12/19/2005
56.65
728.80
8/21 /2006
56.73
728.72
9/24/2007
57.25
728.20
2/23/2009
55.90
729.55
3/29/2010
52.60
732.85
11 /1 /2011
55.01
730.44
11/16/2012
54.90
730.55
PW-121
105
90-105
660.54-645.54
748.07
750.54
11/14/2000
29.09
721.45
9/4/2001
32.36
718.18
2/16/2002
36.25
714.29
9/16/2002
36.25
714.29
9/11/2003
26.18
724.36
8/16/2004
27.41
723.13
12/19/2005
29.55
720.99
8/23/2006
30.15
720.39
9/24/2007
28.55
721.99
2/23/2009
28.93
721.61
3/29/2010
24.62
725.92
11/1/2011
28.18
722.36
11/16/2012
27.73
722.81
12/16/2013
28.17
722.37
12/12/2014
28.70
721.84
New Survey
746.99
749.48
10/30/2015
28.82
720.66
11/21/2016
35.73
713.75
10/11/2017
28.55
720.93
11/6/2018
29.51
719.97
9/11/2019
21.83
727.65
PW-131
250
235-250
504.9-489.9
736.58
739.90
11/14/2000
67.65
672.25
9/4/2001
69.68
670.22
8/19/2002
68.50
671.40
9/17/2002
68.12
671.78
9/11/2003
66.59
673.31
8/16/2004
67.52
672.38
12/19/2005
68.51
671.39
8/21/2006
69.64
670.26
9/24/2007
64.70
675.20
2/23/2009
57.31
682.59
3/29/2010
54.65
685.25
11 /1 /2011
57.33
682.57
11/16/2012
58.05
681.85
12/16/2013
57.20
682.70
12/12/2014
59.52
680.38
New Survey
736.23
739.01
10/26/2015
37.69
701.32
11/18/2016
58.24
680.77
10/11/2017
58.97
680.04
10/31/2018
57.15
681.86
9/11/2019
51.68
687.33

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 17 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
PW-14D
198.8
183.8-198.8
505.33-490.33
686.38
689.13
10/31/2000
16.24
672.89
12/20/2000
> 150
-
9/5/2001
76.98
612.15
9/17/2002
64.16
624.97
9/11/2003
6.51
682.62
8/16/2004
56.01
633.12
12/19/2005
67.27
621.86
8/21/2006
37.29
651.84
9/24/2007
62.45
626.68
3/11/2009
37.90
651.23
3/29/2010
29.41
659.72
11/1/2011
17.63
671.50
11/16/2012
32.37
656.76
12/12/2013
56.60
632.53
12/9/2014
63.29
625.84
New Survey
685.27
686.50
11/3/2015
72.59
613.91
11/16/2016
46.02
640.48
10/12/2017
9.42
677.08
11 /5/2018
39.62
646.88
9/17/2019
87.88
598.62
PW-14S
21.5
11.5-21.5
677.09-667.09
685.96
688.59
10/30/2000
13.19
675.40
12/20/2000
13.47
675.12
9/5/2001
14.28
674.31
9/17/2002
14.55
674.04
9/11/2003
14.92
673.67
8/16/2004
10.26
678.33
12/19/2005
11.54
677.05
8/21 /2006
13.45
675.14
3/11/2009
4.34
684.25
3/29/2010
2.13
686.46
11/1/2011
4.27
684.32
11/16/2012
5.30
683.29
PW-15D
163.5
153.5-163.5
533.93-523.93
684.85
687.43
10/31/2000
13.25
674.18
12/20/2000
13.32
674.11
9/5/2001
14.79
672.64
9/17/2002
13.81
673.62
9/11/2003
10.13
677.30
8/16/2004
12.24
675.19
12/19/2005
13.03
674.40
8/21 /2006
15.80
671.63
9/24/2007
9.93
677.50
3/11/2009
3.20
684.23
3/29/2010
2.02
685.41
11/1/2011
3.25
684.18
11/16/2012
4.39
683.04
12/12/2013
4.50
682.93
12/9/2014
8.14
679.29
New Survey
684.05
685.80
10/28/2015
4.11
681.69
11/15/2016
4.54
681.26
10/12/2017
10.15
675.65
11 /5/2018
4.95
680.85
9/17/2019
6.60
679.20

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 18 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
PW-15S
21.5
11.5-21.5
676.71-666.71
685.88
688.21
10/30/2000
14.87
673.34
12/20/2000
14.91
673.30
9/5/2001
16.26
671.95
9/17/2002
15.42
672.79
9/11/2003
11.61
676.60
8/16/2004
13.89
674.32
12/19/2005
14.14
674.07
8/21 /2006
14.32
673.89
9/24/2007
9.75
678.46
3/11/2009
4.65
683.56
3/29/2010
3.09
685.12
11/1/2011
4.58
683.63
11/16/2012
5.89
682.32
PW-16D
179
169-179
515.98-505.98
681.46
684.98
10/31/2000
10.94
674.04
12/20/2000
10.95
674.03
9/5/2001
12.43
672.55
9/17/2002
11.51
673.47
9/11/2003
7.88
677.10
8/16/2004
9.91
675.07
12/19/2005
10.80
674.18
8/21 /2006
12.09
672.89
9/24/2007
11.21
673.77
New TOC elevation;
survey data pending
3/11/2009
4.38
NA
3/29/2010
3.23
NA
11/1/2011
4.45
NA
11/16/2012
5.65
NA
12/12/2013
5.22
NA
12/9/2014
7.10
NA
New Survey
684.07
686.68
10/28/2015
4.84
681.84
11/15/2016
5.31
681.37
10/12/2017
8.89
677.79
11 /5/2018
4.70
681.98
9/17/2019
6.77
679.91
PW-16S
12.5
5.5-12.5
677.67-670.67
680.97
683.17
10/30/2000
8.00
675.17
12/20/2000
7.39
675.78
9/5/2001
9.82
673.35
9/17/2002
9.65
673.52
9/11/2003
6.56
676.61
8/16/2004
6.79
676.38
12/19/2005
6.21
676.96
8/21 /2006
8.44
674.73
9/24/2007
11.83
671.34
New TOC elevation;
survey data pending
3/11/2009
4.93
NA
3/29/2010
4.10
NA
11/1/2011
4.64
NA
11/16/2012
5.96
NA

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 19 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
PW-17
100
85 - 100
686.0 - 671.0
771.0
774.7
11/14/2000
43.25
731.45
12/20/2000
43.96
730.74
9/5/2001
45.55
729.15
9/16/2002
49.34
725.36
9/11/2003
37.64
737.06
8/16/2004
39.42
735.28
12/19/2005
21.09
753.61
8/21 /2006
43.19
731.51
9/24/2007
42.02
732.68
2/23/2009
42.50
732.20
3/29/2010
38.20
736.50
11/1/2011
43.50
731.20
11/16/2012
42.40
732.30
PW-18
225
210 - 225
525.4 - 510.4
735.4
737.8
11/9/2000
110.06
627.74
12/7/2000
57.23
680.57
12/14/2000
57.28
680.52
12/20/2000
57.27
680.53
9/5/2001
58.50
679.30
9/17/2002
NM
NM
9/11/2003
86.31?
Suspect data
8/16/2004
53.18
684.62
12/19/2005
NM
NM
8/21 /2006
39.32
698.48
9/24/2007
34.56
703.24
3/11/2009
37.43
700.37
3/29/2010
30.22
707.58
11/1/2011
36.15
701.65
11/16/2012
35.04
702.76
12/12/2013
34.75
703.05
12/9/2014
33.80
704.00
New Survey
734.02
736.44
10/26/2015
36.68
699.76
11/15/2016
30.73
705.71
10/16/2017
33.24
703.20
11 /7/2018
32.70
703.74
NM
PW-19
260
235-250
516.6 - 501.6
751.6
754.1
11/5/2001
75.70
678.40
9/17/2002
60.16
693.94
9/11/2003
94.56?
Suspect data
9/11/2003
52.75
701.35
8/16/2004
53.18
700.92
12/19/2005
54.11
699.99
8/21 /2006
54.50
699.60
9/24/007
54.15
699.95
2/25/2009
52.18
701.92
3/29/2010
50.65
703.45
11/1/2011
NM
11/16/2012
NM

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 20 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
W-1
64.7
53.7-64.7
719.05-708.05
772.20
772.75
11/14/2000
42.08
730.67
9/4/2001
24.12
748.63
9/17/2002
48.07
724.68
9/11/2003
36.39
736.36
8/16/2004
38.00
734.75
12/19/2005
40.78
731.97
8/21 /2006
41.87
730.88
2/23/2009
41.63
731.12
3/29/2010
37.13
735.62
11/1/2011
41.53
731.22
11/16/2012
41.00
731.75
W-2
35
23-35
703-691
723.30
726.00
11/14/2000
16.51
709.49
9/4/2001
17.33
708.67
9/17/2002
18.35
707.65
9/11/2003
12.62
713.38
8/16/2004
14.05
711.95
8/21 /2006
18.56
707.44
9/224/07
16.30
709.70
2/23/2009
15.54
710.46
3/29/2010
14.75
711.25
11 /1 /2011
16.43
709.57
11/16/2012
18.10
707.90
W-4
19
9-19
703.64-693.64
710.30
712.64
11/14/2000
9.49
703.15
9/4/2001
9.84
702.80
9/17/2002
8.57
704.07
9/11/2003
6.71
705.93
8/16/2004
6.28
706.36
12/19/2005
7.74
704.90
8/21 /2006
9.09
703.55
9/24/2007
9.94
702.70
2/23/2009
6.22
706.42
3/29/2010
5.80
706.84
11 /1 /2011
6.69
705.95
11/16/2012
9.35
703.29
W-4A
38.5
28.5-38.5
684.75-674.75
712.00
713.25
11/14/2000
9.77
703.48
9/4/2001
10.12
703.13
9/17/2002
9.00
704.25
9/11/2003
7.58
705.67
8/16/2004
6.87
706.38
12/19/2005
6.91
706.34
8/21 /2006
9.49
703.76
9/24/2007
10.08
703.17
2/23/2009
6.92
706.33
3/29/2010
5.83
707.42
11 /1 /2011
6.82
706.43
11/16/2012
9.57
703.68
12/17/2013
7.39
705.86
12./8/2014
14.76
698.49
New Survey
709.86
712.64
10/27/2015
9.93
702.71
11/16/2016
11.07
701.57
10/11/2017
12.93
699.71
10/31 /2018
6.72
705.92
9/11/2019
17.60
695.04

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 21 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
W-413
50
52.7
711.70
713.93
11/14/2000
10.71
703.22
9/4/2001
11.11
702.82
9/17/2002
10.27
703.66
9/11/2003
NM
NM
8/16/2004
7.90
706.03
12/19/2005
7.79
706.14
8/21 /2006
10.59
703.34
9/24/2007
11.00
702.93
2/23/2009
6.50
707.43
3/29/2010
5.78
708.15
11/1/2011
7.58
706.35
11/16/2012
10.50
703.43
W-5
60
50-60
702.06-692.06
750.86
752.06
11/14/2000
32.28
719.78
9/4/2001
33.84
718.22
9/17/2002
38.61
713.45
9/11/2003
26.85
725.21
8/16/2004
29.64
722.42
12/19/2005
32.30
719.76
8/21 /2006
33.11
718.95
9/24/2007
32.50
719.56
2/23/2009
31.97
720.09
3/29/2010
27.64
724.42
11/1/2011
32.63
719.43
11/16/2012
32.35
719.71
W-6
57
42-57
701.8-686.8
742.17
743.80
11/14/2000
30.43
713.37
9/4/2001
31.59
712.21
9/17/2002
35.47
708.33
9/11/2003
22.78
721.02
8/16/2004
27.95
715.85
12/19/2005
30.36
713.44
8/21 /2006
30.81
712.99
9/24/2007
29.86
713.94
2/23/2009
28.53
715.27
3/29/2010
24.32
719.48
11/1/2011
30.13
713.67
11/16/2012
30.15
713.65
W-6A
90
80-90
664.9-654.9
742.91
744.90
11/14/2000
32.45
712.45
9/4/2001
33.70
711.20
9/17/2002
36.67
708.23
9/11/2003
24.62
720.28
8/16/2004
30.20
714.70
12/19/2005
32.51
712.39
8/21 /2006
32.85
712.05
9/24/2007
32.15
712.75
2/23/2009
30.39
714.51
3/29/2010
26.17
718.73
11/1/2011
32.99
711.91
11/16/2012
33.17
711.73

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 22 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
W-613
35
20-35
724.39-709.39
743.13
744.39
11/14/2000
29.75
714.64
9/4/2001
30.98
713.41
9/17/2002
33.71
710.68
9/11/2003
22.34
722.05
8/16/2004
27.00
717.39
12/19/2005
29.44
714.95
8/21/2006
29.97
714.42
9/24/2007
28.86
715.53
2/23/2009
27.99
716.40
3/29/2010
23.70
720.69
11/1/2011
28.03
716.36
11/16/2012
27.33
717.06
W-12
60
50-60
685.84-675.84
734.14
735.84
12/19/2005
21.65
714.19
8/21/2006
NM
NM
9/24/2007
20.96
714.88
2/23/2009
19.83
716.01
3/29/2010
15.45
720.39
11/1/2011
21.26
714.58
11/16/2012
21.30
714.54
W-12A
25
10-25
725.74-710.74
733.62
735.74
12/19/2005
21.61
714.13
8/21/2006
NM
NM
9/24/2007
NM
NM
2/23/2009
20.19
715.55
3/29/2010
15.93
719.81
11/1/2011
21.71
714.03
11/16/2012
21.50
714.24
W-13
20
10-20
744.4-734.7
752.40
754.70
11/14/2000
DRY
--
9/4/2001
DRY
9/17/2002
DRY
--
9/11/2003
24.25
730.45
8/16/2004
14.30
740.40
8/21/2006
DRY
--
2/23/2009
35.97
718.73
3/29/2010
4.30
750.40
11/1/2011
18.61
736.09
11/16/2012
dry
W-14
23
8-23
715.9-700.9
721.3
723.90
12/19/2005
16.68
707.22
8/21/2006
NM
NM
9/24/2007
13.32
710.58
2/23/2009
3.52
720.38
3/29/2010
2.56
721.34
11/1/2011
11.72
712.18
11/16/2012
12.52
711.38
W-15
55
35-55
727.36-707.36
760.0
762.36
8/21/2006
NM
NM
2/23/2009
NM
NM
3/29/2010
NM
NM
11/1/2011
40.96
721.40
11/16/2012
40.27
722.09

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 23 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
W-16
38
28-38
714.01-704.01
739.8
742.01
9/17/2002
29.73
712.28
9/11/2003
NM
NM
8/16/2004
NM
NM
8/21/2006
NM
NM
2/23/2009
22.53
719.48
3/29/2010
18.42
723.59
11/1/2011
23.69
718.32
11/16/2012
23.62
718.39
W-17
20.5
23
687.44
708.4
710.44
12/19/2005
6.97
703.47
8/21/2006
9.40
701.04
9/24/2007
11.00
699.44
2/23/2009
7.80
702.64
3/29/2010
4.62
705.82
11/1/2011
9.86
700.58
11/16/2012
10.20
700.24
W-18
41.5
31.5-41.5
722.21-712.21
751.4
753.71
12/19/2005
35.01
718.70
8/21/2006
36.45
717.26
9/24/2007
37.10
716.61
2/23/2009
36.08
717.63
3/29/2010
33.81
719.90
11/1/2011
36.69
717.02
11/16/2012
37.55
716.16
W-19
40
30-40
717.33-707.33
744.3
747.33
8/21/2006
NM
NM
9/24/2007
29.14
718.19
2/23/2009
28.75
718.58
3/29/2010
24.68
722.65
11/1/2011
29.22
718.11
11/16/2012
29.00
718.33
W-20
10
5-10
712.24-707.24
715.14
717.24
12/19/2005
5.14
712.10
8/21/2006
6.65
710.59
9/24/2007
7.10
710.14
2/23/2009
4.59
712.65
3/29/2010
4.05
713.19
11/1/2011
7.01
710.23
11/16/2012
7.61
709.63
W-21
33.4
33.4
684.78
716.00
718.18
11/14/2000
15.73
702.45
9/4/2001
16.41
701.77
9/17/2002
17.15
701.03
9/11/2003
14.00
704.18
8/16/2004
14.94
703.24
12/19/2005
14.18
704.00
8/21/2006
15.59
702.59
9/24/2007
15.91
702.27
2/23/2009
14.60
703.58
3/29/2010
9.48
708.70
11/1/2011
15.02
703.16
11/16/2012
15.70
702.48

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 24 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
W-23A
75
65-75
707.66-697.66
770.18
772.66
11/14/2000
41.41
731.25
9/4/2001
42.91
729.75
9/17/2002
45.30
727.36
9/11/2003
31.29
741.37
8/16/2004
38.17
734.49
12/19/2005
42.06
730.60
8/21/2006
40.94
731.72
9/24/2007
42.30
730.36
2/23/2009
40.10
732.56
3/29/2010
36.44
736.22
11/1/2011
41.74
730.92
11/16/2012
41.65
731.01
W-23B
55
40-55
731.89-716.89
769.60
771.89
11/14/2000
41.00
730.89
9/4/2001
42.37
729.52
9/17/2002
44.54
727.35
9/11/2003
31.29
740.60
8/16/2004
37.45
734.44
12/19/2005
41.29
730.60
8/21/2006
40.42
731.47
9/24/2007
42.57
729.32
2/23/2009
39.55
732.34
3/29/2010
35.74
736.15
11/1/2011
41.01
730.88
11/16/2012
41.40
730.49
W-24
60
45-60
721.14-706.14
765.80
766.14
11/14/2000
40.45
725.69
9/4/2001
42.61
723.53
9/17/2002
NM
--
9/11/2003
NM
8/16/2004
NM
12/19/2005
NM
8/21/2006
NM
2/23/2009
NM
3/29/2010
NM
11/1/2011
NM
11/16/2012
NM
NM
W-25
58
43-58
727.27-712.27
770.80
770.27
11/14/2000
40.58
729.69
9/4/2001
42.47
727.80
9/17/2002
46.25
724.02
9/11/2003
35.75
734.52
8/16/2004
NM
NM
12/19/2005
NM
NM
8/21/2006
NM
NM
2/23/2009
NM
NM
3/29/2010
NM
NM
11/1/2011
NM
NM
11/16/2012
NM
NM

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 25 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
W-26
53
38-53
721.65-706.65
759.20
759.65
11/14/2000
NM
NM
9/4/2001
NM
NM
9/17/2002
40.62
719.03
9/11/2003
NM
NM
8/16/2004
NM
NM
8/21/2006
NM
NM
2/23/2009
NM
NM
3/29/2010
NM
NM
11/1/2011
NM
NM
11/16/2012
NM
NM
W-27
58.5
43.5-58.5
721.7-706.7
765.50
765.20
11/14/2000
39.86
725.34
9/4/2001
41.37
723.83
9/17/02
NM
NM
9/11/2003
NM
NM
8/16/2004
NM
NM
8/21/2006
NM
NM
2/23/2009
NM
NM
3/29/2010
NM
NM
11/1/2011
39.05
726.15
11/16/2012
37.61
727.59
W-29
49.5
34.5-49.5
715.69-700.69
750.74
750.19
11/14/2000
28.22
721.97
9/4/2001
29.68
720.51
9/17/2002
28.01
722.18
9/11/2003
NM
NM
8/16/2004
NM
NM
8/21/2006
NM
NM
2/23/2009
NM
NM
3/29/2010
NM
NM
11/1/2011
NM
NM
11/16/2012
NM
NM
W-30
53
38-53
722.77-707.77
761.00
760.77
11/14/2000
34.47
726.30
9/4/2001
36.59
724.18
9/17/2002
40.16
720.61
9/11/2003
30.37
730.40
8/16/2004
NM
NM
12/19/2005
NM
NM
8/21/2006
34.92
725.85
9/24/2007
33.67
727.10
2/23/2009
32.79
727.98
3/29/2010
28.64
732.13
11/1/2011
33.73
727.04
11/16/2012
33.58
727.19
RW-NIS1
40
20-40
12/19/2005
10.51
--
2/23/2009
9.43
--
3/29/2010
8.72
--
11/1/2011
3.79
--
11/16/2012
5.57
RW-SIS1
50
30-50
12/19/2005
11.59
2/23/2009
NM
--
3/29/2010
NM
--
11/1/2011
NM
--
11/16/2012
NM

TABLE 4
GROUND WATER ELEVATION DATA
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
JAMESTOWN, NORTH CAROLINA Page 26 of 26
TOP OF
GROUND
TOTAL
SCREENED INTERVAL
GROUND
CASING
DEPTH TO
WATER
Depth
Elevation
MONITOR
DEPTH
ELEVATION
ELEVATION
GAUGING
WATER
ELEVATION
WELL I.D.
(feet BGL)
(feet BGL)
(feet MSL)
(feet MSL)
(feet MSL)
DATE
(feet BTOC)
(feet MSL)
RW-SIS2
40
20-40
12/19/2005
6.48
2/23/2009
7.47
--
3/29/2010
6.98
--
11/1/2011
6.11
--
11/16/2012
8.84
RW-SIS3
40
20-40
713.60
12/19/2005
6.67
706.93
2/23/2009
5.15
708.45
3/29/2010
4.05
709.55
11/1/2011
4.82
708.78
11/16/2012
5.43
708.17
RW-SIS4
45
1545
713.16
12/19/2005
4.38
708.78
2/23/2009
9.99
703.17
3/29/2010
2.51
710.65
11/1/2011
4.27
708.89
11/16/2012
4.00
709.16
RW-SIS5
12/19/2005
9.22
--
2/23/2009
9.22
3/29/2010
5.50
11/1/2011
9.56
11/16/2012
8.50
RW-SIS6
12/19/2005
5.28
2/23/2009
6.15
3/29/2010
4.70
11/1/2011
5.73
--
11/16/2012
6.70
RW-LFS1
50
30-50
696.44
12/19/2005
14.71
681.73
2/23/2009
12.09
684.35
3/29/2010
10.97
685.47
11/1/2011
11.88
684.56
11/16/2012
11.74
684.70
RW-LFS2
50
30-50
697.48
12/19/2005
19.39
678.09
2/23/2009
13.16
684.32
3/29/2010
12.05
685.43
11/1/2011
13.49
683.99
11/16/2012
12.96
684.52
NM = Not measured
BGL = Below ground level
MSL = Mean sea level
BTOC = Below top of well casing

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 1 of 14
VOLATILE ORGANIC COMPOUNDS (ug/L)
i
i
0
c>
y
su
°1
y
Sample
i
i
N
b
o
^'
CD
^'
Sample I.D.
Date
�.
�.
b
0
q
0
b
0
a
3
3
n
n
n
3
b
c,
m
c,
o
S
n
S
S
S
S
i
(D
O
S
O
S
3
F
n
S
S_
n
S
3
O
O
O
O
O
O
A
y
p
O
S
p
O
`G
fD
O
O
O
3
S
O
O
O
O
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n
a
a
0
0
0
OO
N
CD
fD
(D
.
O
O
O
n
(D
O
S
M
M
O
M
fD
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O
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S
_
M
<S
O
S
-a
x
N
S
S
N
S
O
O
0
2)
3
0)
3
a)
3
(D
3
a)
3
a)
3
a)
3
O
3
(D
3
CL
CND
3
a)
3
c)
3
CD
3
CD
3
M
CD
3
M
3
fD
3
CD
3
O.
m
n
fp
CD
CD
fD
fD
fD
fD
fD
M
fD
M
fD
fD
fD
fD
fD
fD
CD
M
fD
CD
fD
to
NC 2L Standard
NE
200
6
7
0.4
0.6
3
6000
1
0.3
50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
MW-1
1/28/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
3/5/2009
17
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
15.3
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
2.1
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
3/31/2010
0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11/2/2011
0
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<3.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
ND
11/20/2012
54
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
54.4
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
ND
1/21/2013
ND
<2.0
12/9/2013
ND
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<2.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<1
ND
12/8/2014
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
10/26/2015
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
11/14/2016
ND
<1
<1
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
10/11/2017
ND
<1
<1
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
11/1/2018
ND
<1
<1
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
9/10/2019
ND
<1
<1
<1
<1
<1
I <1
<2
I <20
<1
<1
I <1
<1
<1
<1
<1
<1
<1
<1
<1
I <1
<1
<1
<3
I ND
MW-2A
1/24/1997
4
4 J
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
MW-2C
1/24/1997
620
160
ND
260
98.0
30.0
ND
ND
ND
7 J
ND
3 J
10 J
ND
ND
ND
ND
6 J
ND
ND
13.0
31.0
ND
2.0
7/15/1998
600
ND
100
290 D
140
ND
ND
ND
ND
5.0
ND
ND
ND
ND
ND
ND
ND
6.0
ND
ND
9.0
50.0
ND
ND
2/24/2009
102
<1.0
<1.0
41.1
<1.0
2.8
<1.0
49
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
3.8
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
4.9
<2.0
ND
MW-3A
8/6/1996
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1/29/1997
24
ND
ND
ND
ND
ND
ND
ND
ND
3 J
ND
15
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
6
MW-3B
7/15/1998
139
ND
ND
ND
ND
ND
ND
120 J
ND
3 J
14
2 J
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
9/26/2000
186
<5
<5
<5
<5
<5
<5
160
NA
<5
26
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/6/2001
139
<5
<5
<5
<5
<5
<5
126
<10
<5
12.6
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
MW-3C
8/6/1996
273
11
ND
150
31
5.0
ND
ND
6
37
ND
ND
ND
ND
2 J
4J
ND
ND
14
13
ND
ND
1/28/1997
197
6
ND
92
21
3.0
ND
ND
ND
ND
41
14
ND
NA
ND
1 J
ND
ND
ND
9
10.0
ND
ND
9/26/2000
138
<5
<5
41
7.2
<5
<5
<100
NA
<5
32
<10
<5
21
<5
<5
<5
37
<5
<5
<10
<10
ND
9/5/2001
178
<5
<5
22.6
<5
<5
<5
117
<10
<5
24.2
<10
<5
14.6
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/18/2002
152
<5
<5
18.4
<5
<5
<5
94.6
<10
<5
27.3
<10
<5
12
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2003
103
<5
<5
<5
<5
<5
<5
90
<10
<5
13.4
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/17/2004
132
<5
<5
19.4
<5
<5
<5
71
<10
<5
30.0
<10
<5
12.4
<5
<5
<5
<5
<5
<5
<10
<5
ND
2/27/2009
589
<1.0
<1.0
104
20.3
4.4
<1.0
160
<5.0
3.0
<1.0
151
32.7
<1.0
<1.0
70.1
<1.0
<1.0
1.9
<1.0
<1.0
2.5
39.4
<2.0
ND
3/30/2010
863
<1.0
<1.0
161
32.4
6.31
<1.0
186
<5.0
3.92
<1.0
249
45.7
<1.0
<1.0
108
<1.0
4.87
1.71
<1.0
<1.0
2.71
61
ND
ND
11/1/2011
1,861
29.1
<0.5
396
144
14
<0.5
80
<0.5
9.94
<0.5
459
192
<0.5
<0.5
364
<0.5
<0.5
3.09
<0.5
1.15
8.74
157
<0.5
3.26
11 /20/2012
1,798
28.5
<0.5
361
106
<0.5
<0.5
268
<0.5
8.73
<0.5
386
150
<0.5
<0.5
314
<0.5
4.30
3.83
1.26
1.40
8.36
146
0.7
10.31
12/11/2013
2,268
18.6
<5
383
107
15
<5
549
<50
9
<5
559
137
<5
<5
318
<5
<5
<5
<5
<5
<5
173
<5
ND
12/11/2014
2,051
100
<1
290
170
<1
<1
311
<5.0
12
17.0
330
60
<1
<1
620
<1
<1
<1
<1
<1
11
130
<3
ND
10/27/2015
1,262
66
<1
210
100
<1
<1
308
>50
10
<1
350
40
<1
<1
410
<1
<1
<1
<1
<1
9.4 J
67
<30
ND
11/14/2016
872
67
<10
94
56
<10
<10
190
<10
5.4 J
12.0
150
<10
<10
<10
270
<10
<10
<10
<10
<10
6.0
27
<30
ND
10/10/2017
402
15
<1
57
22
1.8
<1
120
<20
2.2
<1
49
6.2 J
<1
<1
100
<1
<1
0.81 J
<1
0.73 J
2.0
31
<3
1.70
11/2/2018
414
6
<1
54
30
1.9
<1
110
<20
3.2
<1
66
6.3
<1
<1
110
<1
<1
0.62 J
<1
0.61 J
2.3
22
<3
2.60
9/11/2019
288
<10
<10
41
17
<10
<10
94
<200
<10
<10
50
<10
<10
<10
72
<10
<10
<10
<10
<10
<10
14
<30
ND
MW-4
1/27/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
MW-5
2/24/2009
19
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
18.6
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 2 of 14
n
v;
Sample
N
N
b
0
N
N
Sample I.D.
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n
3
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S
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3-
3-
3-
p
3-
O
3-
S
S
S_
3'
3
Q
O
O
O
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O
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p
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K
fD
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0
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0
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0
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N
fD
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fD
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(D
O
a
O
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M
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3
S
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3
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O
M
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3
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fOD
a
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fOD
..
fOD
..
S_
:
C
O
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S
S
-a
x
.r
N
O
N
S
O
S
S
N
O
S
C
S
S
O
O
O
0
D)
3
D)
3
N
3
M
3
D)
3
D)
3
D)
3
O
3
M
3
0:
N
3
N
3
D)
3
N
3
M
3
a
CD
3
M
3
N
3
M
3
3
O.
Iv
0
fp
(D
CD
M
M
N
N
M
M
M
M
M
M
M
M
M
CD
M
M
N
M
M
U)
NC 2L Standard
NE
200
6
7
0.4
0.6
3
6000
1
0.3
50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
MW-6
1/27/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
NA
ND
ND
ND
ND
ND
ND
ND
ND
ND
9/26/2000
ND
<5
<5
<5
<5
<5
<5
<100
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/6/2001
40
<5
<5
<5
<5
<5
<5
40.2
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2002
24
<5
<5
<5
<5
<5
<5
24.4
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
10/22/2003
16
<5
<5
<5
<5
<5
<5
15.8
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/18/2004
14
<5
<5
<5
<5
<5
<5
13.8
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/3/2009
75
<1.0
<1.0
5.9
<1.0
<1.0
<1.0
36.8
16.2
<1.0
<1.0
1.0
<1.0
<1.0
<1.0
6.3
<1.0
2.4
2.9
<1.0
<1.0
1.6
2.0
<2.0
ND
3/30/2010
73
<1.0
<1.0
7.99
<1.0
<1.0
<1.0
47.9
<5.0
<1.0
<1.0
1.21
<1.0
<1.0
<1.0
7.47
<1.0
2.51
1.86
<1.0
<1.0
1.44
2.13
ND
ND
11/1/2011
57
<0.5
<0.5
12.9
1.84
<0.5
<0.5
18.0
<0.5
<0.5
<0.5
3.86
2.58
<0.5
<0.5
11
<0.5
<0.5
0.52
<0.5
<0.5
1.92
3.66
<0.5
0.63
11/19/2012
58
<0.5
<0.5
13.2
<0.5
<0.5
<0.5
19.7
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
14
<0.5
<0.5
1.86
<0.5
0.68
2.46
4.87
<0.5
0.76
12/11/2013
48
<5
<5
13.8
<5
<5
<5
12.3
<50
<5
<5
6.50
<5
<5
<5
16
<5
<5
<5
<5
<5
<5
<5
<10
ND
12/12/2014
101
<1
<1
13
0.47 J
<1
<1
58.4
<5
0.96 J
<1
2.2
3.8
<1
<1
14
<1
<1
1.9
<1
0.65 J
1.7
4.7
<3
1.2
10/30/2015
69
<1
<1
10
<1
<1
<1
44.8
<5
0.63 J
<1
2.0 J
2.2 J
<1
<1
8.3
<1
<1
0.99 J
<1
<1
1.2
3.2
<3
1.5
11/17/2016
90
<1
<1
12
<1
<1
<1
59
<20
0.74 J
<1
1.9 J
2.1 J
<1
<1
11
<1
<1
1.6
<1
0.56 J
1.6
3.2
<3
1.4
10/10/2017
53
<1
<1
7
<1
<1
<1
34
<20
15 J
<1
1.7 J
<1
<1
<1
6
<1
<1
<1
<1
<1
4.2
2.0
<3
ND
11/2/2018
118
<1
<1
12
<1
<1
<1
82
<20
0.63 J
<1
2.7
2.1
<1
<1
13
<1
<1
0.79 J
<1
0.54 J
1.1
3.3
<3
1.6
9/12/2019
67
<1
<1
5.4
<1
<1
<1
29
27.0
0.45 J
<1
<1
<1
<1
<1
4.2
<1
<1
<1
<1
<1
<1
1.1
<3
ND
MW-7B
3/3/2009
244,324
2,630
<100X
25,800
10,100
9,760
<100X
28,900
12,000
<100X
<100X
39,500
2,450
<100X
<100X
36,100
181
48,100
522
6,020
<100X
251
15,800
1,740
4,470
MW-8
1/28/1997
119
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2 J
96
4.0
3/5/2009
47
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
10.8
15.2
6.6
<1.0
10.8
<1.0
<1.0
<1.0
<1.0
<1.0
3.3
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
MW-9
1/28/1997
1
ND
ND
ND
ND
ND
ND
ND
ND
1 J
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
DUP-1 (MW-9)
1/28/1997
2
ND
ND
ND
ND
ND
ND
ND
ND
2 J
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2/26/2009
182
<1.0
<1.0
1.5
<1.0
<1.0
<1.0
168
6.0
<1.0
<1.0
2.7
2.0
<1.0
<1.0
2.1
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
MW-10
1/27/1997
126
ND
ND
6
ND
ND
ND
120
ND
2 J
ND
ND
ND
ND
ND
ND
ND
ND
1 J
ND
ND
ND
7/14/1998
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
9/26/2000
258
<5
<5
7.6
<5
<5
<5
250
NA
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/6/2001
335
<5
<5
<5
<5
<5
<5
335
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2002
234
<5
<5
<5
<5
<5
<5
234
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/16/2003
221
<5
<5
<5
<5
<5
<5
221
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/19/2004
198
<5
<5
<5
<5
<5
<5
198
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/6/2009
176
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
162
6.4
1.1
<1.0
4.1
<1.0
<1.0
<1.0
<1.0
<1.0
2.2
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
3/29/2010
184
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
166
10.6
<1.0
<1.0
3.82
1.26
<1.0
<1.0
<1.0
<1.0
2.31
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11/1/2011
56
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
47
<0.5
<0.5
<0.5
3.99
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
6.45
11/19/2012
148
<5
74
<5
<5
<5
<5
74.4
<50
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
ND
12/10/2013
33
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
28.1
<5
<0.5
<0.5
2.27
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<1
2.7
12/10/2014
137
<1
<1
<1
<1
<1
<1
133
<5
<1
<1
2.6
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
1.2
10/26/2015
104
<1
<1
<1
<1
<1
<1
103
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
1.1
11/14/2016
130
<1
<1
<1
<1
<1
<1
130
<20
0.78 J
<1
2.8 J
<1
<1
<1
0.41 J
<1
<1
<1
<1
<1
<1
<1
<3
ND
10/10/2017
150
<1
<1
<1
<1
<1
<1
150
<20
<1
<1
<1
1.8 J
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
10/31/2018
160
<1
<1
<1
<1
<1
<1
160
<20
<1
<1
0.93 J
1.1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
9/10/2019
74
<1
<1
<1
<1
<1
<1
72
<20
<1
<1
1.5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
MW-11
1/23/1997
84
5 J
ND
4 J
3 J
ND
ND
ND
ND
4 J
9
ND
ND
NA
10
ND
ND
ND
ND
ND
ND
2 J
47
9/28/2000
298
<5
<5
<5
<5
<5
<5
270
NA
8.6
12
<10
<5
<5
<5
7.7
<5
<5
<5
<5
<10
<10
ND
9/10/2001
314
<5
<5
<5
<5
<5
<5
288
<10
10.6
15.3
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/18/2002
434
<5
<5
<5
<5
<5
<5
283
<10
11.1
13.7
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
126
9/19/2003
118
<5
<5
<5
<5
<5
<5
94.2
<10
7.4
16.8
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/17/2004
120
<5
<5
<5
<5
<5
<5
94.1
<10
11.5
14.4
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/4/2009
74
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
39.8
11.6
5.4
<1.0
15.0
<1.0
<1.0
<1.0
<1.0
<1.0
1.7
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 3 of 14
n
v;
Sample
iv
N
b
p
N
CDN
Sample I.D.
Date
�.
�.
b
0
q
0
b
0
F
3
n
3-
n
n
3
v
c,
m
3
v
c,
o
S
n
S
3-
3-
3-
p
3-
O
3-
S
F
n
n
O
O
O
O
O
O
3A
y
p
O
S
O
O
K
fD
O
O
O
S
C)
0
0
O'
o
o
n
W
n
a
'
'
a
n
'
0
/�
♦/
N
CD
C
N
..
fD
..
K
CD
,.
fD
,.
O
O
�p
O
3
S
M
3
(D
O
M
fD
3
S
fOD
a
O_
fOD
fOD
S
O
S
S
S
S
S
-a
x
.r
N
O
N
S
O
S
S
N
O
S
C
S
S
O
O
O
0
D)
3
D)
3
N
3
M
3
D)
3
D)
3
D)
3
O
3
(D
3
CL
fD
3
N
3
D)
3
fD
3
fD
3
a
CD
3
M
3
fD
3
CD
3
3
O.
m
n
fp
fD
CD
fD
M
fD
fD
CD
I M
fD
M
fD
fD
fD
fD
I fD
CD
CD
M
fD
M
(D
1
U)
NC 2L Standard
NE
200
6
7
0.4
0.6
3
6000
1
0.3
50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
MW-12A
1/23/1997
11
2 J
ND
ND
3 J
ND
ND
ND
ND
2 J
ND
ND
ND
ND
ND
ND
2 J
ND
2 J
ND
ND
ND
7/10/1998
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
10/30/2000
ND
<5
<5
<5
<5
<5
<5
<100
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/6/2001
12
<5
<5
<5
<5
<5
<5
<10
12.3
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/20/2002
27
<5
<5
<5
<5
<5
<5
11.7
14.9
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/16/2003
28
<5
<5
<5
<5
<5
<5
11.9
15.6
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/18/2004
44
<5
<5
<5
<5
<5
<5
<10
43.7
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/6/2009
40
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
38.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
1.9
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
4/1/2010
6
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
2.50
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
3.09
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11 /2/2011
38
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
29.0
<5
<0.5
<0.5
8.04
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
0.61
11/19/2012
203
<5
<5
<5
<5
<5
<5
203
<50
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
ND
12/10/2013
210
<5
<5
<5
<5
<5
<5
210
<50
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<10
ND
12/11/2014
226
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
210
8.3
<1.0
<1.0
5.6
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<3
1.7
10/27/2015
213
<1
<1
<1
<1
<1
<1
200
<5
<1
<1
11
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
2.2
11/14/2016
207
<1
<1
<1
<1
<1
<1
200
19 J
<1
<1
5.9
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
1.5
10/10/2017
273
<1
<1
<1
<1
<1
<1
260
<20
<1
<1
11
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
1.7
11/1/2018
93
<1
<1
<1
<1
<1
<1
79
<20
<1
<1
11
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
2.9
9/10/2019
189
<1
<1
<1
<1
<1
<1
180
16 J
<1
<1
6.2
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
2.9
MW-12B
1/23/1997
16
6
ND
2 J
ND
ND
ND
ND
ND
ND
8.0
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
7/10/1998
11
ND
ND
ND
ND
ND
ND
ND
ND
ND
11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
9/28/2000
567
<5
<5
<5
<5
<5
<5
510
<5
18
<10
<5
11.0
<5
28
<5
<5
<5
<5
<10
<10
ND
9/6/2001
371
<5
<5
<5
<5
<5
<5
359
<10
<5
12
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/20/2002
221
<5
<5
<5
<5
<5
<5
211
<10
<5
10.2
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/16/2003
262
<5
<5
<5
<5
<5
<5
250
<10
<5
12.4
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/18/2004
196
<5
<5
<5
<5
<5
<5
182
<10
<5
13.7
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/4/2009
224
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
199
17.6
<1.0
<1.0
5.8
<1.0
<1.0
<1.0
<1.0
<1.0
1.5
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
4/9/2010
191
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
176
12.6
<1.0
<1.0
2.50
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11 /2/2011
62
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
43
<5
<0.5
<0.5
13.0
<0.5
<0.5
<0.5
3.6
<0.5
<0.5
<0.5
<0.5
<0.5
1.5
<0.5
<0.5
1.1
11/19/2012
69
<10
<10
<10
<10
<10
<10
68.5
<100
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
ND
12/10/2013
83
<5
<5
<5
<5
<5
<5
71.4
<50
<5
<5
11.3
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<10
ND
12/11/2014
158
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
132
6.3
0.64 J
<1.0
12.0
<1.0
<1.0
<1.0
3.4
<1.0
<1.0
<1.0
<1.0
<1.0
0.73 J
<1.0
<3
4.2
10/27/2015
123
<1
<1
<1
<1
<1
<1
117
<5
<1
<1
4.7
<1
<1
<1
1.1 J
<1
<1
<1
<1
<1
<1
<1
<3
ND
11/14/2016
164
<1
<1
<1
<1
<1
<1
150
<20
0.5 J
<1
11.0
<1
<1
<1
2.7 J
<1
<1
<1
<1
<1
0.58 J
<1
<3
3.4
10/10/2017
181
<1
<1
<1
<1
<1
<1
170
<20
0.94 J
<1
8.3
<1
<1
<1
2.3 J
<1
<1
<1
<1
<1
0.61 J
<1
<3
2.7
11/1/2018
112
<1
<1
<1
<1
<1
<1
95
<20
0.51 J
<1
11
<1
<1
<1
2.7
<1
<1
<1
<1
<1
<1
<1
<3
3.1
9/11/2019
133
<1
<1
<1
<1
<1
<1
120
<20
0.48 J
<1
10
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
3.1
MW-12D
9/10/1998
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
NA
NA
ND
ND
ND
NA
ND
ND
ND
ND
9/29/2000
132
<5
<5
<5
<5
<5
<5
120
NA
<5
<5
<10
<5
<5
<5
12
<5
<5
<5
<5
<10
<10
ND
9/12/2001
54
<5
<5
<5
<5
<5
<5
14.4
39.6
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/20/2002
31
<5
<5
<5
<5
<5
<5
<10
21.9
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
9.5
10/22/2003
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/5/2009
ND
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
4/1/2010
6
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
2.58
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
3.15
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11/3/2011
11
<0.5
<0.5
0.99
<0.5
<0.5
<0.5
3.0
<5
<0.5
<0.5
2.22
<0.5
<0.5
<0.5
1.42
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
ND
11/23/2012
79
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
77.6
<5
<0.5
<0.5
1.30
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
ND
12/12/2013
ND
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<2.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
ND
12/11/2014
1740
41
2.2
29
41
770
<1.0
5.3
5.3
12
6.3
480
<1.0
<1.0
<1.0
5
<1.0
66
47
32
<1.0
180
2.2
7.1
8.6
10/25/2015
ND
<1
<1
<1
<1
<1
<1
4.29 J
<5
<1
<1
1.1 J
<1
<1
<1
0.49 J
<1
<1
<1
<1
<1
0.56 J
<1
<3
ND
11/18/2016
ND
<1
<1
0.48 J
0.41 J
<1
<1
4.9 J
<20
<1
<1
0.76 J
<1
<1
<1
0.79 J
<1
<1
<1
<1
<1
<1
<1
<3
ND
10/11/2017
8
<1
<1
<1
<1
<1
<1
8.2 J
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
11/1/2018
16
<1
<1
0.82 J
1.4
<1
<1
7.2
<20
<1
<1
0.95 J
<1
<1
<1
4.1
<1
<1
<1
<1
<1
1.8
1.5
<3
ND
9/11/2019
4
<10
<10
<10
<10
<10
<10
3.7
<200
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<30
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 4 of 14
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3
6000
1
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3,000
70
3
70
600
5
0.7
600
100
3
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500
MW-14
8/6/1996
147
ND
ND
ND
ND
ND
ND
ND
ND
ND
140
ND
ND
ND
ND
ND
ND
ND
ND
7 J
ND
ND
1/29/1997
2,118
ND
ND
1 J
ND
ND
ND
1,700 J
ND
2 J
ND
180
ND
ND
ND
ND
ND
ND
ND
ND
3 J
7 J
1 J
46
MW-15A
1/30/1997
2,266
ND
ND
ND
ND
ND
ND
1,700
ND
9 J
ND
520
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
37.0
9/5/2001
3,157
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<5
<5
<5
<5
2,640
<10
<5
517
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/18/2002
2,140
<5
<5
<5
<5
<5
<5
1,500
<10
<5
635
<10
<5
5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/17/2003
2,424
<25
<25
<25
<25
<25
<25
1,910
<50
<25
514
<50
<25
<25
<25
<25
<25
<25
<25
<25
<50
<25
ND
8/18/2004
3,209
<25
<25
<25
<25
<25
<25
2,720
<50
<25
489
<50
<25
<25
<25
<25
<25
<25
<25
<25
<50
<25
ND
3/6/2009
2,238
<1.0
<1.0
<1.0
<1.0
<1.0
1.2
1,900
<5.0
<1.0
<1.0
335
<1.0
<1.0
<1.0
1.8
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
3/31/2010
1,211
<1.0
<1.0
<1.0
<1.0
<1.0
1.26
1,170
<5.0
<1.0
<1.0
32.7
<1.0
<1.0
<1.0
7.48
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11/2/2011
940
<0.5
<0.5
<0.5
<0.5
<0.5
1.23
480
<5
1.27
<0.5
430
<0.5
<0.5
<0.5
1.64
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
0.92
14.96
11/19/2012
2,324
<10
<10
<10
<10
<10
<10
1,920
<100
<10
<10
404
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
<10
ND
12/10/2013
3,308
<5
<5
<5
<5
<5
<5
2,950
<50
<5
<5
350
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<10
8.2
12/9/2014
2,405
<5
<5
<5
<5
<5
<5
1,970
<25
<5
<5
430
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<15
4.6
10/27/2015
2,159
<5
<5
<5
<5
<5
<5
1,740
<25
<5
<5
410
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<15
9.0
11/14/2016
2,334
<1
<1
<1
<1
<1
1.4
2,200
<20
0.49 J
<1
110
<1
<1
<1
5.3
<1
<1
<1
<1
<1
0.45 J
0.93 J
<3
17.3
10/11/2017
2,734
<1
<1
<1
<1
<1
1.8
2,600
<20
0.51 J
<1
110
<1
<1
<1
5.8
<1
<1
<1
<1
<1
0.43 J
0.69 J
<3
16.1
10/31/2018
1,796
<1
<1
<1
<1
<1
0.42 J
1,600
<20
0.67J
<1
190
<1
<1
<1
0.45J
<1
<1
<1
<1
<1
<1
<1
<3
6.2
9/10/2019
1,590
<5
<5
<5
<5
<5
<5
1,400
<100
<5
<5
190
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<15
ND
MW-15B
1/30/1997
330
ND
ND
ND
ND
ND
ND
210 J
ND
1 J
ND
110
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
9.0
MW-16
1/21/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
MW-17
3/5/2009
305
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
258
30.5
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
5.8
<1.0
<1.0
1.7
<1.0
<1.0
5.9
3.2
<2.0
ND
MRF-1
1/21/1997
63
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
63.0
ND
ND
ND
7/13/1998
53
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
53.0
ND
ND
ND
2/24/2009
65
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
28.3
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
6.9
<1.0
<1.0
<1.0
<1.0
<1.0
29.9
<1.0
<2.0
ND
MRF-2
1/21/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
OW-NIS1
3/10/2009
214
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
180
9.9
<1.0
<1.0
20.6
<1.0
<1.0
<1.0
<1.0
<1.0
3.4
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
OW-DR1
9/28/2000
26,291
360
<5
4,300
1,000
150
<5
2,900
150
6,600
3,300
<5
4,100
33
310
18
420
26
14
2,400
210
ND
OW-DR2
7/21/1998
11,612
400 J
1,500 D
480 J
ND
3,400 J
ND
150
2,900 D
1,100 D
ND
40 J
460 J
22
ND
250 J
910
9/26/2000
25,240
460
<5
4,200
1,400
220
<5
4,900
NA
170
5,600
1,300
<5
3,500
25
120
19
260
77
28
2,800
161
ND
9/10/2001
27,394
695
<5
4,950
1,330
208
<5
3,450
<10
145
5,980
1,380
<5
5,700
27
107
36
271
11.3
27.8
2,880
196
ND
2/27/2009
25,306
1,230
7.3
3,550
1,580
141
1.3
4,180
46.8
113
<1.0
5,380
1,030
4.3
41.4
6,320
21.1
41.4
47.2
201
17.4
29.5
1,190
120
13.6
3/30/2010
24,982
1,330
<1.0
3,330
1,790
123
<5.0
3,910
<5.0
127
<1.0
5,510
1,090
<1.0
<1.0
6,400
<1.0
<1.0
<1.0
182
<1.0
<1.0
1,190
ND
ND
11/1/2011
22,265
1,910
<25
3,000
2,050
121
<25
990
<250
101
<25
4,130
2,350
<25
<25
6,290
<25
<25
<25
153
<25
<25
1,100
38
32.0
11/23/2012
19,775
1,620
<50
2,230
1,430
<50
<50
2,180
<500
<50
<50
4,810
1,760
<50
<50
4,650
<50
<50
<50
177
<50
<50
918
<50
ND
12/11/2013
24,766
1,920
<50
2,730
1,920
120
<50
3,130
<500
154
<50
4,800
1,890
<50
<50
6,600
<50
<50
<50
172
<50
<50
1,330
<100
ND
12/12/2014
6,977
11
<100
19
15
3
<100
2,160
<5
1.1
1.8
4,500
<1.0
<1.0
<1.0
45
<100
<1.0
<100
160
<1.0
<100
13
48
ND
10/30/2015
12,595
720
<20
1,300
800
71
<20
1,630
<100
79
<20
3,400
480
<20
<20
3,200
<20
<20
24
95
14 J
22
750
24 J
ND
11/18/2016
11,740
830
<20
1,300
860
150
<20
1,800
<400
65
<20
2,800
340
8.8 J
<20
2,800
9.4 J
<20
19 J
65
12 J
20
710
21 J
ND
10/10/2017
4,103
100
<5
590
290
48
<5
990
<50
23
<100
920
45
<5
<5
840
<5
<5
5.9
5.4
4.7 J
5.4
240
4.5 J
ND
11/2/2018
1,882
20
<10
250
110
16
<10
560
<200
8.9 J
<10
380
13
<10
<10
430
<10
<10
<10
<10
<10
<10
94
<30
ND
9/11/2019
1,178
12
<5
200
84
11
<5
250
<100
7
<5
260
12
<5
<5
290
<5
<5
<5
<5
<5
<5
52
<15
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 5 of 14
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OW-DR3
9/20/2002
3,989
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<5
221
<5
15.4
<5
1,050
<10
11.3
1,840
778
<5
8.9
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29.5
<5
<5
<5
<5
35.3
<5
ND
9/19/2003
2,815
<5
<5
201
<5
14.7
<5
690
<10
6.1
1,390
455
<5
11.1
<5
12
<5
<5
<5
<5
35.5
<5
ND
8/24/2004
4,403
<50
<50
452
<50
<50
<50
1,260
<100
<50
1,910
675
<50
<50
<50
<50
<50
<50
<50
<50
106
<50
ND
10/12/2004
3,438
<5
<5
353
<5
14.2
<5
916
<10
6.9
1,480
553
<5
26.2
<5
11.5
<5
<5
<5
<5
77.1
<5
ND
3/4/2009
2,184
<1.0
<1.0
251
5.3
25.1
<1.0
552
<5.0
3.3
<1.0
984
267
<1.0
5.8
38.7
<1.0
5.0
1.3
2.4
<1.0
2.6
40.6
<2.0
ND
11/26/2012
2,352
<0.5
<0.5
226 J
14.7
23.3
<0.5
471
<5
<0.5
<0.5
1,020
359
<0.5
<0.5
73.4
<0.5
5.5
2.06
2.16
1.21
6.55
92.8
0.61
279.57
12/10/2013
2,757
<5
<5
374
43.6
26.4
<5
793
<50
<5
<5
1,060
249
<5
<5
112.0
<5
<5
<5
<5
<5
7.70
85.3
<10
6.30
OW-DR4
9/23/2002
20,502
1,860
<5
4,320
2,010
226
<5
1,570
<10
121
323
282
<5
7,630
5.4
27.6
55.3
27.3
11.7
66.1
1,880
86.7
ND
9/22/2003
22,030
1,350
<50
4,850
1,860
181
<50
2,200
<100
107
562
311
<50
8,960
<50
<50
<50
<50
<50
65.4
1,530
53.5
ND
8/24/2004
20,516
1,840
<250
4,630
2,100
298
<250
1,480
<500
<250
608
<250
<250
7,880
<250
<250
<250
<250
<250
<250
1,680
<250
ND
10/12/2004
9,067
810
<5
3,110
1,230
167
<5
2,190
<10
77
353
<10
<5
<5
<5
<5
35.3
<5
18.8
39.3
987
50.0
ND
10/20/2004
20,733
1,700
<250
4,480
2,240
<250
<250
2,120
<500
<250
522
<500
<250
8,030
<250
<250
<250
<250
<250
<250
1,590
51.0
ND
2/25/2009
15,223
1,490
6.2
2,570
1,510
156
<1.0
1,300
56.0
96.4
<1.0
659
127
7.1
3.9
6,350
4.3
<1.0
44.9
12.9
17.7
96.3
677
38.5
ND
OW-SIS-1
8/17/2004
9,885
1,770
6.0
768
1,580
201
<5
811
<10
95
111
<10
18.3
3,150
<5
160
215
<5
<5
774
213
12.8
ND
3/9/2009
16,834
2,820
11.6
1,280
2,950
256
<10.OX
1,360
107
180
<10.OX
179
54.1
29.6
<10.OX
5,200
<10.OX
146
412
<10.OX
<10.OX
1,540
288
20.9
ND
OW-SIS-2
2/24/2009
3,111
79.8
<1.0
579
277
26
<1.0
418
17.8
38.2
<1.0
29
14.8
<1.0
<1.0
1,030
4.9
356
3.8
36.1
2.1
3.9
167
28.2
ND
OW-SIS-3
3/4/2009
41,840
9,110
14.4
4,320
4,640
172
2.7
2,540
158
167
<1.0
147
23.5
34.9
<1.0
13,600
46.2
3,330
103
132
72.6
1,620
1,400
207
ND
OW -SR
3/9/2009
57,440
2,920
48.4
4,980
5,530
1,860
<10.OX
6,670
242
89.6
<10.OX
2,160
1,840
194
<10.OX
20,400
15.7
680
437
618
40.2
1,290
7,240
185
ND
OW-LFS-1
2/26/2009
782
<1.0
<1.0
1.5
<1.0
<1.0
<1.0
723
12.8
4.5
<1.0
1 20.8
12.0
<1.0
<1.0
4.3
2.4
<1.0
<1.0
1.1
<1.0
<1.0
<1.0
<2.0
ND
OW-LFS-2
2/26/2009
363
<1.0
<1.0
1.9
<1.0
<1.0
<1.0
329
9.0
2.4
<1.0
9.4
3.5
<1.0
<1.0
7.1
<1.0
<1.0
<1.0
<1.0
<1.0
1.1
<1.0
<2.0
ND
3/30/2010
281
<1.0
<1.0
2.33
<1.0
<1.0
<1.0
251
<5.0
2.17
<1.0
9.92
2.74
<1.0
<1.0
11.8
<1.0
<1.0
<1.0
<1.0
<1.0
1.15
<1.0
ND
ND
11/1/2011
110
<0.5
<0.5
3.23
<0.5
<0.5
<0.5
65
<5
4.52
<0.5
10.1
1.90
<0.5
<0.5
20.7
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
1.3
<0.5
3.5
11/19/2012
276
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
274
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
2.12
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
ND
12/11/2013
421
<5
<5
<5
<5
<5
<5
391
<50
<5
<5
<5
<5
<5
<5
29.6
<5
<5
<5
<5
<5
<5
<5
<10
ND
12/12/2014
306
<1.0
<1.0
1.9
<1.0
<1.0
<1.0
255
8.1
6.2
<1.0
15
3.8
<1.0
<1.0
12
<1.0
<1.0
<1.0
0.48 J
<1.0
0.54 J
1.7
0.75 J
3.7
10/26/2015
285
<1.0
<1.0
1.8 J
<1.0
<1.0
<1.0
253
<5
4.5
<1.0
11
<1.0
<1.0
<1.0
13
<1.0
<1.0
<1.0
<1.0
<1.0
0.93 J
<1.0
0.45 J
3.4
11/14/2016
276
<1.0
<1.0
1.2 J
<1.0
<1.0
<1.0
250
12 J
2.4
<1.0
11
0.76 J
<1.0
<1.0
9
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<3
3.2
10/10/2017
248
<1
<1
1.1 J
<1
<1
<1
240
<20
1.4
<1
4.6
1.5 J
<1
<1
4.6 J
<1
<1
<1
<1
<1
<1
<3
0.50 J
2.0
10/31/2018
404
<1
<1
<1
<1
<1
<1
360
<20
32.0
<1
9.3
1.3
<1
<1
0.80 J
<1
<1
<1
<1
<1
<1
<1
<3
1.2
9/12/2019
213
<1
<1
0.8 J
<1
<1
<1
210
<20
0.48 J
<1
3.1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
PW-1 D
1/24/1997
659
ND
ND
1 J
1 J
ND
ND
530 J
ND
ND
7
ND
ND
ND
ND
ND
ND
ND
ND
ND
120
ND
ND
ND
7/15/1998
110
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
110
ND
ND
ND
PW-2D
2/7/1997
28
ND
ND
10
ND
ND
ND
ND
10 J
ND
ND
ND
4 J
ND
ND
ND
4 J
ND
ND
ND
ND
ND
ND
ND
7/18/1998
11
ND
ND
9
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2 J
ND
ND
ND
ND
ND
ND
ND
2/26/2009
21
<1.0
<1.0
1.3
<1.0
<1.0
<1.0
1 19.5
<5.0
<1.0
I <1.0
<1.0
I <1.0
I <1.0
I <1.0
<1.0
I <1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 6 of 14
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Sample
N
N
b
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c,
m
F
0
c,
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S
S
3-
3-
3-
p
3-
O
3-
S
S
S_
3'
3
Q
O
O
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O
O
O
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fD
N
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fD
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(D
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a
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3
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O
M
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a
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fOD
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fOD
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:
C
O
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O
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S
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O
S
C
S
S
O
O
O
0
D)
3
D)
3
N
3
M
3
a)
3
a)
3
D)
3
O
3
M
3
0:
N
3
N
3
D)
3
N
3
M
3
a
CD
3
M
3
N
3
M
3
3
a
m
0
fp
(D
CD
I M
M
N
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M
M
M
fD
I M
M
M
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CD
CD
M
N
M
N
1
U)
NC 2L Standard
NE
200
6
7
0.4
0.6
3
6000
1
0.3
50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
-
PW-3D
2/7/1997
42,680
4,100
ND
370 J
790
15,000
ND
ND
ND
260 J
ND
16,000
ND
ND
ND
ND
1,300
990
740
ND
3,600
ND
ND
160
7/17/1998
21,462
ND
650 D
ND
520 J
8,100 D
ND
ND
ND
160
ND
8,600
3 J
2 J
ND
13
680
610 D
ND
ND
2,000 D
54.0
49.0
21.0
4/9/2010
22,149
<1.0
<1.0
393
82.5
8,840
<1.0
39.8
18.4
5.46
<1.0
174
<1.0
<1.0
<1.0
36.1
<1.0
99.1
137.0
7.72
<1.0
419
11.6
ND
ND
11/3/2011
damaged
11/27/2012
8,532
54
<50
293
203
4,830
<50
55
<500
<50
<50
2,150
<50
<50
<50
54.0
<50
<50
222
82
<50
589
<50
<50
ND
12/17/2013
27,696
993
9.0
491
1,180
12,800
<5
19.5
<50
137
<5
7,250
<5
<5
<5
59.4
<5
979
723
338
<5
2,540
58.4
12.3
106.5
12/11/2014
73,348
1,500
<200
610
2,800
14,000
<200
67.6
<100
310
240
32,000
<200
<200
<200
100
<200
1,100
8,900
1,300
<200
9,300
150
180
790
10/29/2015
67,602
2,300
<200
660
2,100
17,000
<200
112
<1000
350
<200
32,000
<200
<200
<200
380
86 J
1,000
3,300
1,400
<200
7,000
120 J
>600
160 J
11/16/2016
45,170
970
<100
400
870
20,000
<100
120
<2000
190
<100
16,000
<100
<100
<100
110
<100
1,100
1,300
610
<100
3,500
<100
<300
470 J
10/11/2017
70,050
1,700
<200
730
2,000
20,000
<200
180
<4000
330
<200
31,000
<200
<200
<200
280
<200
1,700
3,700
1,200
<200
7,100
120 J
130
760 J
11/2/2018
61,400
1,600
<200
660
2,000
17,000
<200
170
<4000
320
<200
27,000
<200
<200
<200
510
<200
1,400
3,100
1,100
<200
6,100
130 J
100 J
1101
9/11/2019
31,290
860
<200
480
1,100
14,000
<200
140
<200
190 J
<200
11,000
<200
<200
<200
350
<200
1,300
620
470
<200
<200
<200
<600
780 J
PW-41
1/29/1997
1,086
19.0
ND
440
19.0
280
ND
ND
ND
3 J
210
101
ND
ND
ND
4 J
4 J
ND
7 J
100
4 J
ND
7/13/1998
1,012
ND
ND
240 D
26 J
200 D
ND
ND
ND
3 J
110 J
ND
ND
140 J
ND
ND
101
2 J
ND
11 J
130 DJ
ND
140
9/26/2000
1,063
37.0
<5
290
28.0
200
<5
<100
<5
160
<10
<5
190
<5
<5
8
<5
<5
30
120
<10
ND
9/12/2001
1,532
47.8
<5
378
49.2
256
<5
108
<10
<5
211
<10
<5
277
<5
<5
30.6
<5
<5
47.4
127
<5
ND
9/19/2002
1,861
55.8
<15
451
64
306
<15
156
<30
<15
253
<30
<15
336
<15
<15
33.7
<15
<15
53.1
152
<15
ND
10/22/2003
1,781
95.3
<5
340
84
247
<5
232
<10
<5
228
<10
<5
361
<5
<5
18.7
<5
<5
27.5
147
<5
ND
8/26/2004
1,997
78.1
<20
359
78.9
409
<20
215
<40
<20
266
<40
<20
357
<20
<20
39.9
<20
<20
50.6
143
<20
ND
3/5/2009
1,441
45.2
<2.OX
227
66.5
192
<2.OX
204
15.4
<2.OX
<2.OX
172
6.4
<2.OX
<2.OX
288
<2.OX
<2.OX
51.4
<2.OX
<2.OX
67.2
106
<4.OX
ND
4/2/2010
1,143
<1.0
<1.0
220
38.8
178
<1.0
224
8.12
2.32
<1.0
132
3.78
<1.0
<1.0
195
<1.0
3.19
21.3
<1.0
<1.0
28.5
87.6
ND
ND
11/2/2011
1,077
456
<5
8.84
48.7
101
<5
44
<50
<5
<5
74.2
<5
<5
<5
204
<5
<5
17.3
<5
<5
118
4.99
<5
ND
11/20/2012
1,086
28.9
<0.5
122
65.5
135
<0.5
175
<50
<5
<5
84.3
<5
<5
<5
276
<5
<5
30
<5
<5
87.8
81.3
<5
ND
12/17/2013
1,276
62.2
<5
134
67.1
139
<5
143
<50
<5
<5
82.4
<5
<5
<5
406
<5
<5
9.4
<5
<5
110
123
<10
ND
12/8/2014
864
35
<5
73
48
87
<5
196
<25
<5
<5
63
3.1 J
<5
<5
210
<5
<5
28
<5
<5
74
50
<15
ND
10/29/2015
942
33
<2
75
43
55
<2
206
<10
2.0
<2
88
<2
<2
<2
240
<2
<2
44
<2
1.3 J
95
57
<6
3.9
11/17/2016
933
59
<2
75
51
74
<2
210
<40
2.0
<2
71
<2
<2
<2
230
<2
<2
31
<2
1.5 J
80
47
<6
3.3
10/11/2017
906
46
<2
72
42
49
<2
240
<40
2.0
<2
77
3.5 J
<2
<2
230
<2
<2
30
<2
1.7 J
70
45
<6
2.9
11/2/2018
853
46
<2
57
42
36
<2
220
<40
1.6 J
<2
78
2.8
<2
<2
230
<2
<2
26
<2
1.3 J
64
46
<6
2.7
9/11/2019
720
32
<5
69
37
36
<5
200
<100
<5
<5
60
<5
<5
<5
230
<5
<5
13
<5
<5
<5
43
<15
ND
PW-5D
1/30/1997
426
ND
ND
20.0
ND
2.0
ND
ND
76.0
2 J
140
33.0
8.0
NA
ND
26
ND
10
ND
ND
18
ND
91
7/14/1998
6,293
96 J
ND
550 D
ND
38.0
ND
1,300
ND
61 J
3,800
ND
ND
22.0
19 J
ND
9 J
260 D
3 J
5 J
ND
99 J
31
9/26/2000
13,327
360
<5
2,400
500
150
<5
2,300
110
4,300
220
<5
1,600
21
6.3
17
180
31
28
1,000
104
ND
9/10/2001
13,445
437
<5
2,310
534
168
<5
1,680
<10
90.6
4,110
156
<5
2,280
19.3
11.1
31.7
205
6.6
30.8
1,270
105
ND
9/23/2002
14,201
552
<5
2,500
694
211
<5
1,920
<10
90.1
3,460
190
<5
2,900
16.9
6
27.6
169
7.5
26.2
1,330
101
ND
9/19/2003
753
<5
<5
57.6
<5
<5
<5
412
110.0
<5
164
<10
<5
9
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/18/2004
12,945
534
<5
2,360
757
177
<5
1,260
<10
78.0
3,240
<10
<5
2,980
15.6
<5
32.1
131
<5
15.7
1,280
85
ND
10/12/2004
6,457
166
<5
842
235
57.4
<5
2,420
33.4
31.6
1,240
<10
<5
921
5.7
<5
9.5
44.0
<5
5.8
417
28.4
ND
2/27/2009
14,465
638
5.7
1,900
885
178
<1.0
2,390
36.4
83.4
<1.0
3,110
119
3.5
22.8
4,120
14.8
<1.0
38.3
131
12.1
26.4
672
78.7
ND
3/30/2010
12,428
481
<20.0
1,760
771
102
<20.0
2,170
<100
71.4
<20
3,070
210
<20.0
<20.0
3,040
<20.0
<20.0
<20.0
109
<20.0
<20.0
644
ND
ND
11/3/2011
11,290
895
<50
1,760
925
103
<50
580
<500
<50
<50
2,440
488
<50
<50
3,450
<50
<50
<50
<50
<50
<50
649
<50
ND
11/23/2012
11,845
792
<5
1,290
896
109
<5
1,710
<50
51.9
<5
2,000
302
<5
<5
3,850
<5
<5
21.5
101
<5
22.2
602
49.8
47.6
12/16/2013
19,821
1,550
<5
2,200
2,200
181
<5
3,760
<50
121
<5
2,960
509
7.2
<5
5,300
<5
<5
<5
<5
29.7
<5
920
57.6
25.5
12/10/2014
18,168
860
<100
1,800
1,700
340
<100
1,740
<100
100
120
5,200
350
<100
<100
4,400
<100
<100
100
<100
160
<100
1,000
58
240
10/30/2015
7,514
280
<20
870
490
61
<20
1,390
<100
46
<20
2,000
52
<20
<20
1,900
<20
<20
14 J
45
8.8 J
9.2 J
380
13 J
ND
11/18/2016
11,941
830
<50
1,400
960
190
<50
1,600
<1000
65
<50
3,000
240
<50
<50
2,900
<50
<50
28 J
66
<50
28 J
690
22 J
ND
10/10/2017
4,536
120
<10
640
300
57
<10
1,100
<200
23
<10
830
36
<10
<10
1,200
<10
<10
5.0 J
4.0 J
<10
5.1 J
230
4.1 J
ND
11/2/2018
2,010
20
<10
280
110
15
<10
560
<200
11
<10
450
14
<10
<10
440
<10
<10
<10
<10
<10
<10
110
<30
ND
9/11/2019
940
7
<5
170
55
8
<5
240
<100
4.4 J
<5
220
<5
<5
<5
180
<5
<5
<5
<5
<5
<5
56
<15
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 7 of 14
n
v;
Sample
iv
N
b
p
N
CD
N
Sample I.D.
�.
�.
b
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b
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3
n
n
v
3
v
Date
0
0
0
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0
3-
n
3
c,
m
F
0
c,
0
S
S
3-
3-
3-
p
3-
O
3-
S
S
S_
3'
3
O
O
O
O
O
O
3A
y
p
O
S
O
O
K
fD
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S
C)
0
0
O'
0
0
0
W
0
a
0
0
a
n
0
0
/�
♦/
N
CD
N
..
fD
..
(D
O
a
O
O
(D
O
3
S
O
3
(DD
O
M
O
3
S
fOD
a
O_
fOD
..
fOD
..
S_
:
C
O
S
S
S
S
S
-a
x
.r
N
O
N
S
O
S
S
N
O
S
C
S
S
O
O
O
0
D)
3
D)
3
N
3
M
3
a)
3
a)
3
D)
3
O
3
(D
3
0:
fD
3
N
3
D)
3
fD
3
fD
3
a
CD
3
M
3
fD
3
M
3
3
O.
m
n
fp
fD
CD
fD
M
fD
fD
CD
M
fD
M
fD
fD
fD
fD
fD
CD
M
M
fD
M
(D
U)
NC 2L Standard
NE
200
6
7
0.4
0.6
3
6000
1
0.3
50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
PW-6D
7/21/1998
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
10/2/2000
ND
<5
<5
<5
<5
<5
<5
<100
NA
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/12/2001
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2002
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
10/20/2003
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/25/2004
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/18/2009
3.8
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
3.8
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
3/31/2010
31.3
<1.0
<1.0
4.9
<1.0
<1.0
<1.0
5.70
<5.0
<1.0
<1.0
15.5
<1.0
<1.0
<1.0
3.24
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
2.0
ND
ND
11/3/2011
damaged
11/21/2012
damaged
12/10/2013
damaged
new well
12/10/2014
266
3.2
<1
41
16
<1
<1
43.2
<5
1.7
<1
90
<1
<1
<1
48
<1
<1
0.53J
1.1
<1
<1
20.0
1.5
ND
10/30/2015
116
2.7
<1
20
8.6
<1
<1
8.85 J
<5
0.9 J
<1
46
3.0 J
<1
<1
31
<1
<1
<1
<1
<1
<1
7.9
<3
ND
11/17/2016
935
14.0
<5
140
59.0
5.2
<5
190
<100
5.4
<5
260
12.0
<5
<5
210
<5
<5
<5
<5
<5
<5
39
<15
ND
12/28/2016
13
NA
NA
NA
NA
NA
NA
13
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2/1/2017
600
NA
NA
NA
NA
NA
NA
600
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
10/10/2017
1,626
19.0
<2
270
95
12.0
<2
450
<40
7.3
<2
320
20.0
<2
<2
370
<2
<2
1.5
<2
1.4 J
1.4 J
61
<6
ND
11/1/2018
996
7.4
<2
130
50
6.5
<2
320
<40
2.7
<2
230
6.1
<2
<2
210
<2
<2
1.3
<2
<2
1.1 J
31
<6
ND
9/12/2019
492
4.5
<1
120
42
4.7
<1
100
<20
1.4
<1
120
7.0
<1
<1
150
<1
0.84 J
0.84 J
<1
1.6
<1
25
<3
ND
PW-61
1/28/1997
33
ND
ND
11
ND
1 J
ND
ND
ND
ND
14
4 J
ND
ND
1 J
ND
ND
ND
2 J
ND
ND
ND
7/14/1998
46
ND
ND
10
ND
ND
ND
ND
ND
ND
14
4 J
ND
5
ND
ND
5
ND
ND
3 J
ND
ND
5
9/26/2000
29
<5
<5
12
<5
<5
<5
<100
<5
8.4
<10
<5
8.3
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/12/2001
28
<5
<5
10.7
<5
<5
<5
<10
<10
<5
7.2
<10
<5
9.9
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2002
31
<5
<5
12.2
<5
<5
<5
<10
<10
<5
9.0
<10
<5
9.8
<5
<5
<5
<5
<5
<5
<10
<5
ND
10/20/2003
47
<5
<5
12.1
<5
<5
<5
11.6
<10
<5
9.9
<10
<5
13
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/25/2004
42
<5
<5
10.6
<5
<5
<5
11.7
<10
<5
6.2
<10
<5
13.0
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/4/2009
8.2
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
2.0
<1.0
2.4
<1.0
3.8
<1.0
<1.0
<1.0
<2.0
ND
3/31/2010
143.1
<1.0
<1.0
32
1.63
3.47
<1.0
22.5
<5.0
<1.0
<1.0
35.7
10.3
<1.0
<1.0
25.2
<1.0
<1.0
1.56
<1.0
<1.0
2.81
7.88
ND
ND
11/3/2011
damaged
11/21/2012
damaged
12/10/2013
damaged
new well
12/10/2014
115
0.41 J
<1
26
2.2
<1
<1
47.9
<5
<1
<1
2.2
<1
<1
<1
24
<1
1.1
0.7 J
0.7 J
<1
1.1
3.3
4.8
1.9
10/27/2015
98
<1
<1
20
1.1 J
3
<1
46.7
<5
<1
<1
7.6
<1
<1
<1
18
<1
<1
0.74 J
<1
<1
1.4
<1
<3
1.1
11/17/2016
132
<1
<1
19
1.1 J
11
<1
56
<20
0.47 J
<1
21
<1
<1
<1
18
<1
0.53 J
1.0
<1
<1
2.5
3.6
<3
3.89 J
10/10/2017
148
<1
<1
25
0.92 J
3.6
<1
71
<20
0.52 J
<1
19
<1
<1
<1
25
<1
<1
0.42 J
<1
<1
1.1
3.0
<3
1.4
11/1/2018
128
<1
<1
17
1.1
3.2
0.4 J
60
<20
0.58 J
<1
14
<1
<1
<1
24
<1
<1
0.8 J
<1
<1
1.7
4.7
<3
1.8
9/12/2019
148
<1
<1
19
1.0
2.9
<1
79
<20
0.74 J
<1
13
<1
<1
<1
26
<1
<1
0.42 J
<1
<1
<1
5.3
<3
1.8
PW-71
2/6/1997
11
ND
ND
2 J
ND
ND
ND
ND
7 J
ND
1 J
ND
ND
ND
ND
ND
ND
ND
1 J
ND
ND
ND
7/17/1998
443
86
ND
16
37
23
ND
ND
ND
2 J
77
ND
ND
50
ND
ND
65
9
ND
21
4 J
3 J
50
9/28/2000
99
<5
<5
9.2
15
7.2
<5
<100
NA
<5
18
<10
<5
36
<5
14
<5
<5
<5
<5
<10
<10
ND
9/12/2001
158
<5
<5
<5
<5
<5
<5
150
<10
<5
8.1
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/20/2002
139
<5
<5
<5
<5
<5
<5
126
<10
<5
7.7
<10
<5
5
<5
<5
<5
<5
<5
<5
<10
<5
ND
10/22/2003
161
<5
<5
<5
<5
<5
<5
144
<10
<5
9.8
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
6.8
8/25/2004
199
<5
<5
<5
<5
<5
<5
191
<10
<5
8.4
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/4/2009
75
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
50.5
6.8
<1.0
<1.0
11.8
<1.0
<1.0
<1.0
2.6
<1.0
<1.0
<1.0
<1.0
<1.0
1.4
<1.0
1.8
ND
PW-8S
1/28/1997
670
ND
ND
ND
ND
ND
ND
ND
670 J
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
7/13/1998
17
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
7
ND
ND
ND
ND
ND
ND
ND
ND
10
9/27/2000
7.7
<5
<5
<5
<5
<5
<5
<100
<5
<5
<10
<5
7.7
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/6/2001
37
<5
<5
<5
<5
<5
<5
14.5
<10
<5
6.1
<10
<5
8.1
<5
<5
<5
<5
<5
<5
<10
<5
8.7
9/17/2003
180
<5
<5
<5
<5
<5
<5
<10
163
<5
11.3
<10
<5
6.0
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/17/2004
7.7
<5
<5
<5
<5
<5
<5
<10
<10
<5
7.7
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/3/2009
53
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
41.3
<1.0
<1.0
9.2
<1.0
<1.0
<1.0
2.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 8 of 14
n
v;
Sample
iv
N
b
p
N
CD
N
Sample I.D.
�.
�.
b
q
b
F
3
n
n
v
3
v
Date
0
0
0
0
0
3-
n
3
c,
m
F
0
c,
0
S
S
3-
3-
3-
p
3-
O
3-
S
S
S_
3'
3
O
O
O
O
O
O
3A
y
p
O
S
O
O
K
fD
O
O
O
S
C)
0
0
O'
0
0
0
W
0
a
0
0
a
n
0
0
/�
♦/
N
CD
N
..
fD
..
(D
O
a
O
O
(D
O
3
S
O
3
(DD
O
M
O
3
S
fOD
a
O_
fOD
..
fOD
..
S_
:
C
O
S
S
S
S
S
-a
x
.r
N
O
N
S
O
S
S
N
O
S
C
S
S
O
O
O
0
D)
3
D)
3
N
3
M
3
a)
3
a)
3
D)
3
O
3
(D
3
0:
fD
3
N
3
D)
3
fD
3
fD
3
a
CD
3
M
3
fD
3
M
3
3
O.
m
n
fp
fD
CD
fD
M
fD
I fD
M
M
fD
M
fD
fD
fD
fD
fD
CD
CD
M
fD
M
(D
U)
NC 2L Standard
NE
200
6
7
0.4
0.6
6000
1
0.3
50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
PW-91
1/30/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
7/17/1998
50
ND
ND
ND
ND
ND
ND
LND
50 J
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
3/12/2009
97
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
2.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
PW-10D
9/10/1998
15.0
ND
ND
6.0
ND
ND
ND
ND
ND
ND
ND
9 J
NA
NA
NA
ND
ND
ND
ND
ND
ND
ND
9/26/2000
ND
<5
<5
<5
<5
<5
<5
<100
NA
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/12/2001
11
<5
<5
<5
<5
<5
<5
10.8
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2002
10.4
<5
<5
<5
<5
<5
<5
<10
10.4
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2003
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/17/2004
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
2/26/2009
31
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
1.6
<1.0
<1.0
<1.0
<2.0
29.0
3/29/2010
2
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
2.37
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11/1/2011
2
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<3.0
<5
<0.5
<0.5
1.56
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
0.72
<0.5
<0.5
<0.5
<0.5
ND
11 /21 /2012
ND
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<2.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
ND
12/11/2013
ND
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<2.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<1
ND
12/10/2014
ND
<1
<1
<1
<1
<1
<1
1.7 J
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
1.8 J
ND
11/3/2015
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
11/17/2016
15
1.5
<1
2.3 J
4.9 J
<1
<1
<1
<20
<1
<1
2.6 J
<1
<1
<1
7.8
<1
<1
0.60 J
0.49 J
<1
2.4
3.3
<3
ND
10/10/2017
ND
<1
<1
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
10/31/2018
20
0.96 J
<1
1.6
2.3
<1
<1
<2
<20
<1
<1
1.1
<1
<1
<1
8.6
<1
<1
<1
0.5 J
<1
2.7
3.2
<3
ND
9/12/2019
ND
<1
<1
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
PW-101
1/27/1997
7.0
ND
ND
6
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1 J
ND
ND
ND
ND
ND
ND
ND
7/10/1998
8.0
ND
ND
8
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
9/26/2000
14
<5
<5
14
<5
<5
<5
<100
NA
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/11/2001
44
<5
<5
12.9
<5
<5
<5
31.4
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2002
39
<5
<5
<5
<5
<5
<5
14.7
24.6
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/18/2003
126
<5
<5
17
<5
<5
<5
109
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/17/2004
83
<5
<5
16.7
<5
<5
<5
61.3
<10
<5
<5
<10
<5
5.0
<5
<5
<5
<5
<5
<5
<10
<5
ND
3/12/2009
150
<1.0
<1.0
12.7
<1.0
<1.0
<1.0
115
13.8
<1.0
<1.0
<1.0
1.5
<1.0
<1.0
5.2
<1.0
1.1
<1.0
<1.0
<1.0
1.1
<1.0
<2.0
ND
3/29/2010
229
<1.0
<1.0
12.6
<1.0
<1.0
<1.0
206
<5.0
<1.0
<1.0
1.38
1.96
<1.0
<1.0
4.86
<1.0
1.49
<1.0
<1.0
<1.0
<1.0
1.14
ND
ND
11/1/2011
78
<0.5
<0.5
21.7
1.65
<0.5
<0.5
36
<5
<0.5
<0.5
1.95
3.73
<0.5
<0.5
8.64
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
3.18
<0.5
1.45
11/19/2012
440
220
<5
25.9
<5
<5
<5
183
<50
<5
<5
<5
<5
<5
<5
11.4
<5
<5
<5
<5
<5
<5
<5
<5
ND
12/11/2013
276
<5
<5
19.5
<5
<5
<5
249
<50
<5
<5
<5
<5
<5
<5
7.7
<5
<5
<5
<5
<5
<5
<5
<10
ND
12/10/2014
243
<1
<1
18
0.55 J
<1
<1
205
<5
0.45 J
<1
2.3
5.1
<1
<1
6.2
<1
<1
<1
<1
<1
<1
4.4
<3
1.6
10/29/2015
22
<1
<1
16
<1
<1
<1
222
<5
0.57 J
<1
2.7 J
3.3 J
<1
<1
4.2 J
<1
<1
<1
<1
<1
<1
3.9
<3
2.3
11/17/2016
270
<1
<1
18
0.41 J
<1
<1
240
<20
0.85 J
<1
3.0
2.6 J
<1
<1
5.2
<1
<1
<1
<1
0.45 J
<1
4.1
<3
2.93 J
10/10/2017
226
<1
<1
5.7
<1
<1
<1
220
<20
<1
<1
<1
<1
<1
<1
1.4 J
<1
<1
<1
<1
<1
<1
0.51 J
<3
0.44 J
11/1/2018
319
<1
<1
13
<1
<1
<1
290
<20
0.96 J
<1
2.5
3.7
<1
<1
4.2
<1
<1
<1
<1
<1
<1
3.4
<3
2.0
9/12/2019
292
<1
<1
12
<1
<1
<1
260
<20
1.0
<1
2.6
<1
<1
5.9
4.2
<1
<1
<1
<1
<1
<1
3.7
<3
2.4
PW-111
7/22/1997
458
ND
ND
ND
ND
ND
81
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
450
ND
ND
ND
7/16/1998
354
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
47
ND
ND
ND
ND
ND
260 D
ND
ND
47
9/29/2000
156
<5
<5
<5
<5
<5
<5
<100
NA
<5
<5
<10
<5
26
<5
<5
<5
<5
<5
130
<10
<10
ND
9/11/2001
254
<5
<5
<5
<5
<5
<5
14.3
<10
<5
<5
<10
<5
34.8
<5
<5
<5
<5
<5
205
<10
<5
ND
9/18/2002
274
<5
<5
<5
<5
<5
<5
22.3
<10
<5
<5
<10
<5
38.1
<5
<5
<5
<5
<5
214
<10
<5
ND
9/23/2003
516
<10
<10
<10
<10
<10
<10
50.3
<20
<10
<10
<20
<10
87.3
<10
<10
<10
<10
<10
378
<20
<10
ND
8/25/2004
365
<10
<10
21.5
<10
<10
<10
31.3
<20
<10
<10
<20
<10
82.7
<10
<10
<10
<10
<10
229
<20
<10
ND
3/5/2009
224
<1.0
<1.0
<1.0
<1.0
<1.0
1.7
13.2
8.4
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
36.2
<1.0
2.5
<1.0
<1.0
<1.0
162
<1.0
<5.0
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 9 of 14
n
v;
Sample
iv
N
b
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N
CD
N
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C
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0
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3
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3
N
3
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3
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3
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3
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3
O
3
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3
0:
fD
3
N
3
c)
3
fD
3
fD
3
a
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3
M
3
fD
3
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3
3
CL
m
n
fp
fD
CD
fD
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CD
I M
fD
M
fD
fD
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M
M
fD
M
(D
U)
NC 2L Standard
NE
200
6
7
0.4
0.6
3
6000
1
0.3
50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
PW-121
7/22/1997
8.0
ND
ND
ND
ND
ND
ND
ND
6 J
ND
ND
ND
ND
ND
2 J
ND
ND
ND
ND
ND
ND
ND
7/16/1998
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
10/2/2000
ND
<5
<5
<5
<5
<5
<5
<100
NA
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/12/2001
1.0
<5
<5
<5
<5
<5
<5
1.0
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2002
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
10/22/2003
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/17/2004
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/29/2006
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
9/27/2007
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
3/3/2009
6.7
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
6.7
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
3/31/2010
ND
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11/2/2011
1
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<3.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
0.69
<0.5
<0.5
<0.5
<0.5
ND
11/20/2012
9
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
8.55
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
1.22
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
ND
1/21/2013
ND
<2.0
12/17/2013
ND
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<2.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<1
ND
12/12/2014
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
10/30/2015
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
1.3 J
<1
<1
<1
0.70 J
<1
<1
<1
<1
<1
<1
<1
<3
ND
11/21/2016
ND
<1
<1
<1
<1
<1
<1
<1
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
10/11/2017
ND
<1
<1
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
11/6/2018
ND
<1
<1
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
9/11/2019
ND
<1
<1
<1
<1
<1
<1
1.2 J
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
ND
PW-131
7/22/1998
295
16/14
NA
77/76
35/26
ND/ND
NA
ND/ND
ND/ND
2 J/2 J
6/6
ND/4 J
NA
ND/ND
3 J / 2 J
8/8
NA
4 J / 4 J
34/36
ND/ND
110/110
9/29/2000
754
27
<5
240
120
12
<5
<100
NA
8.2
11.0
11.0
<5
220
<5
<5
<5
<5
5.4
6.2
93
<10
ND
9/12/2001
892
16.4
<5
275
89.0
14.1
<5
70.9
<10
7.8
10.4
10.9
<5
305
<5
<5
<5
<5
<5
5.2
87.6
<5
ND
9/20/2002
799
<15
<15
243
67.4
<15
<15
128
<30
<15
<15
<30
<15
270
<15
<15
<15
<15
<15
<15
91
<15
ND
9/23/2003
1,027
11.7
<10
321
92.2
14.3
<10
118
<20
<10
21.7
<20
<10
358
<10
<10
<10
<10
<10
<10
90.4
<10
ND
8/25/2004
1,285
<5
<5
353
116
22.2
<5
166
<10
10.7
47.0
13.4
<5
405
<5
<5
5.6
<5
<5
8.4
138
<5
ND
3/4/2009
520
<1.0
<1.0
175
39.3
8.9
<1.0
78.0
<5.0
5.6
<1.0
18.1
4.1
<1.0
<1.0
133
<1.0
<1.0
1.8
<1.0
<1.0
2.6
53.9
<2.0
ND
3/31/2010
581
<1.0
<1.0
192
41.6
8.8
<1.0
92.4
<5.0
4.96
<1.0
14.5
3.66
<1.0
<1.0
158
<1.0
<1.0
1.07
<1.0
<1.0
2.08
62
ND
ND
11/3/2011
784
6.18
<0.5
214
121
11.8
<0.5
27.0
<5
8.05
<0.5
31.4
7.27
<0.5
<0.5
243
<0.5
<0.5
<0.5
<0.5
<0.5
6.26
107
<0.5
0.87
11 /23/2012
779
2.10
<0.5
137
58.5
<0.5
<0.5
332
<5
2.21
<0.5
23.1
4.98
<0.5
<0.5
147
<0.5
<0.5
1.64
<0.5
<0.5
3.26
62.1
<0.5
5.21
12/16/2013
743
<5
<5
197
56.3
11.0
<5
139
<50
<5
<5
<5
<5
<5
<5
236
<5
<5
<5
<5
<5
<5
104
<10
ND
12/12/2014
564
<2
<2
150
53
11.0
<2
91.6
<10
4.0
<2
22
<2
<2
<2
160
<2
<2
1.5
<2
<2
2.8
69
<6
2.1
10/26/2015
419
<1
<1
120
28
4.6
<1
88.6
<5
3.2
<1
18
2.0 J
<1
<1
110
<1
<1
1.2
<1
<1
2.1
41
<3
2.2
11/18/2016
433
<1
<1
120
34
5.0
<1
89
<20
2.9
<1
17
1.6 J
<1
<1
120
<1
<1
1.3
<1
<1
2.3
40
<3
1.9
10/11/2017
350
<1
<1
100
20
4.8
<1
88
<20
2.5
<1
11
1.7 J
<1
<1
80
<1
<1
0.83 J
<1
<1
1.6
40
<3
1.9
10/31/2018
322
<1
<1
82
20
4.1
<1
81
<20
2.3
<1
12
1.3
<1
<1
84
<1
<1
0.86 J
<1
<1
1.7
32
<3
1.5
9/11/2019
282
<1
<1
94
18
3.6
<1
44
<20
2.4
<1
8.9
1.4
<1
<1
72
<1
<1
0.72 J
<1
0.44 J
<1
38
<3
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 10of14
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200
6
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0.4
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3
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1
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50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
PW-14D
7/22/1998
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
10/31/2000
ND
<5
<5
<5
<5
<5
<5
<100
NA
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/10/2001
81
<5
<5
<5
<5
<5
<5
<10
73.1
<5
<5
<10
<5
<5
<5
7.6
<5
<5
<5
<5
<10
<5
ND
9/17/2003
71
<5
<5
<5
<5
<5
<5
<10
70.7
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/17/2004
25
<5
<5
<5
<5
<5
<5
<10
25.2
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/29/2006
16
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<2/<2
16.3/18.1
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<1/<1
<2/<2
ND
7/26/2007
13
<1
<1
<1
<1
<1
<1
<2
12.6
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
3/11/2009
14
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
13.4
<1.0
<1.0
1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
3/31/2010
21
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
21.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11 /7/2011
23
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<3.0
13.6
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
9.2
11/27/2012
40
<0.5
<0.5
1.1
<0.5
<0.5
<0.5
35.4
<5
<0.5
<0.5
1.72
<0.5
<0.5
<0.5
2.18
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
ND
12/12/2013
690
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
690
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<1
ND
12/9/2014
236
8.9
<1
25
17
<1
<1
28.7
16.0
1.9
1.2
75.0
6.9
<1
<1
44
<1
<1
0.41 J
1.1
<1
<1
10
2.9 J
ND
11/3/2015
10
0.53 J
<1
4.2 J
1.0 J
<1
<1
8.33 J
8.5 J
<1
<1
4.0
<1
<1
<1
5.9
<1
<1
<1
<1
<1
<1
<1
<3
ND
11/16/2016
9
0.64 J
<1
3.1 J
0.96 J
<1
<1
7.6 J
<20
<1
<1
4.4
<1
<1
<1
5
<1
<1
<1
<1
<1
<1
0.89 J
<3
ND
10/12/2017
972
5.9
<1
100
24
0.63 J
<1
640
<20
1.7
<1
83.0
4.7 J
<1
<1
110
<1
<1
0.87 J
<1
<1
0.59 J
7.8
<3
ND
11/5/2018
153
<1
<1
0.91 J
<1
<1
<1
2.4
<20
0.71 J
<1
1.5
<1
<1
<1
1.6
7.7
<1
<1
23
<1
<1
<1
59
ND
9/17/2019
19
<1
<1
0.55 J
<1
<1
<1
<1
10 J
<1
<1
1.4
<1
<1
<1
0.89 J
1.6
<1
<1
5.2
<1
<1
<1
11
ND
PW-14S
7/23/1998
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
10/30/2000
ND
<5
<5
<5
<5
<5
<5
<100
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/6/2001
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/16/2003
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/19/2004
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/29/2006
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
7/28/2007
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
3/10/2009
28
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
28.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
PW-15D
7/21/1998
841
ND
150
ND
8
320 J
ND
ND
14.0
220 D
75.0
3 J
ND
3 J
38.0
ND
10.0
10/31/2000
9,042
46.0
<5
710
57
19
<5
1,800
NA
73.0
5,100
690
<5
220
<5
68.0
<5
25.0
5.4
6.5
200
22.0
ND
9/6/2001
12,582
<5
<5
1,150
<5
<5
<5
3,650
<10
<5
5,930
813
<5
653
<5
<5
<5
<5
<5
<5
386
<5
ND
9/16/2003
2,467
24.0
<5
349
78.2
14.1
<5
622
<10
<10
728
162
<5
352
<5
20.1
<5
<5
<5
<5
118
<5
ND
8/19/2004
507
<5
<5
105
19.7
<5
<5
126
<10
<10
107
27.0
<5
104
<5
<5
<5
<5
<5
<5
17.8
<5
ND
8/29/2006
8,571
234
<10
1,450
507
65.2
<10
1,650
<50
57.3
1,910
200
<10
1,920
<10
16.9
10.1
<10
<10
<10
550
<20
ND
9/26/2007
1.8
<1
<1
1.8
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
3/11/2009
11,715
426
3.6
1,840
740
83.6
<1.0
1,990
37.1
69.3
<1.0
2,890
254
1.7
<1.0
2,530
1.9
7.4
20.2
31.6
8.4
7.1
713
52.2
7.4
3/30/2010
14,028
466
3.37
2,120
876
83.0
<1.0
2,230
40.1
82.1
<1.0
3,660
273
1.65
<1.0
3,360
<1.0
8.21
15.9
19.1
9.47
8.0
772
ND
ND
11/7/2011
196
10.1
<5
39.4
<5
<5
<5
8
<50
<5
<5
61.9
<5
<5
<5
58.4
<5
<5
<5
<5
<5
<5
18.5
<5
ND
11/26/2012
6,608
424
1.89
1,160
612
64.6
0.59
1,180
<5
73.9
<0.5
812 J
351
<0.5
<0.5
2,070
6.56
7.23
12.0
53.2
12.0
7.48
483
37.5
50.63
12/12/2013
11,775
591
<5
1,440
593
70.5
<5
1,770
<50
67.3
88.4
2,920
536
<5
<5
2,920
<5
<5
<5
51.8
<5
<5
676
32.7
18.2
12/9/2014
12,358
520
<50
1,400
920
82.0
<50
1,930
<250
66.0
<50
3,600
470
<50
<50
2,700
<50
<50
<50
23.0
<50
<50
670
<150
ND
10/28/2015
4,734
68
<50
570
220
<50
<50
1,280
<250
28.0
<50
1,300
<50
<50
96
1,000
<50
<50
<50
<50
<50
<50
200
<150
ND
11/15/2016
3,812
63
<10
430
170
24
<10
1,300
<200
16.0
<10
910
99
<10
<10
690
<10
<10
<10
<10
<10
<10
110
<30
ND
10/12/2017
1,321
12
<1
200
66
7.9
<1
510
<20
4.2
<1
190
12
<1
<1
280
<1
<1
1.5 J
<1
1.1 J
1.0 J
39
<3
ND
11/5/2018
572
3.1
<2
81
27
2.2
<2
240
<40
1.1 J
<2
79
5.3
<2
<2
120
<2
<2
1.2 J
<2
1.1 J
<2
11
<6
ND
9/17/2019
176
<5
<5
30
8.9
<5
<5
91
<100
<5
<5
7.4
<5
<5
<5
39
<5
<5
<5
<5
<5
<5
<5
<15
ND
PW-15S
7/21/1998
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
10/30/2000
ND
<5
<5
<5
<5
<5
<5
<100
NA
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/6/2001
11
<5
<5
<5
<5
<5
<5
11.0
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/16/2003
25
<5
<5
<5
<5
<5
<5
24.6
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/19/2004
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/29/2006
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
9/25/2007
1.5
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
1.5
<1
<1
<1
<1
<1
<1
<1
<2
ND
3/11/2009
78
<1.0
<1.0
18.6
4.8
<1.0
<1.0
6.6
13.4
<1.0
<1.0
<1.0
4.5
<1.0
<1.0
26.5
<1.0
3.9
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 11 of 14
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3
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3
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NC 2L Standard
NE
200
6
7
0.4
0.6
3
6000
1
0.3
50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
-
PW-16D
7/22/1998
786
ND
130
ND
6.0
87.0
ND
7.0
380
140
ND
3 J
ND
6.0
16.0
ND
11.0
11/2/2000
1,610
<120
<120
210
<120
<120
<120
<2,500
<120
1,400
<250
<120
<120
<120
<120
<120
<120
<120
<120
<250
<250
ND
9/6/2001
4,184
10.6
<5
355
12.3
8.9
<5
788
<10
29.3
2,580
250
<5
71.5
<5
22.7
<5
<5
<5
<5
55.2
<5
ND
9/17/2003
4,324
<100
<100
501
<100
<100
<100
858
<200
<100
2,680
<200
<100
285
<100
<100
<100
<100
<100
<100
<200
<100
ND
8/19/2004
2,722
<50
<50
353
<50
<50
<50
729
<100
<50
1,200
119
<50
215
<50
<50
<50
<50
<50
<50
106
<50
ND
8/29/2006
4,357
71.8
<10
732
178
31.5
<10
889
<50
31.1
1,370
78
<10
709
<10
<10
<10
<10
<10
<10
266
<20
ND
9/25/2007
5,130
<20
<20
844
247
36.5
<20
882
<100
36.8
1,700
75.5
<20
957
<20
<20
<20
<20
<20
<20
351
<40
ND
3/11/2009
6,570
110
1.5
1,160
372
50.5
<1.0
890
15.9
42.6
<1.0
1,950
93.5
<1.0
<1.0
1,400
<1.0
4.9
11.1
3.4
4.2
4.5
442
10.5
3.3
3/30/2010
6,295
88.2
<1.0
1,180
329
48.2
<1.0
1,080
27.2
39.9
<1.0
1,780
80.8
<1.0
<1.0
1,240
<1.0
4.85
4.97
1.50
3.03
3.59
384
ND
ND
11/7/2011
7,345
232.0
<5
1,380
732
62.5
<5
260
<50
55.9
<5
1,770
405
<5
<5
1,740
<5
<5
<5
<5
<5
11.7
655
7.9
8.0
11/26/2012
7,820
165
1.01
1,090
543
50.4
0.52
1,260
<5
48.7
<0.5
2,100
229
<0.5
<0.5
1,680
<0.5
4.57
8.59
3.30
6.72
5.5
601
<0.5
23.1
12/12/2013
7,988
251
<5
1,360
688
65.9
<5
1,330
<50
55.2
37
1,870
245
<5
<5
1,700
<5
<5
<5
<5
<5
<5
368
5.7
12.0
12/9/2014
6,745
180
<20
920
490
60
<20
1,150
<100
36
<20
1,900
150
<20
<20
1,500
<20
<20
9.2
<20
<20
<20
350
<60
ND
10/28/2015
3,527
51
<20
480
190
18
<20
772
<100
22
<20
1,000
44
<20
<20
790
<20
<20
<20
<20
<20
<20
160
<60
ND
11/15/2016
2,461
46
<10
390
180
23
<10
650
<200
12
<10
520
<10
<10
<10
540
<10
<10
3.2 J
<10
<10
2.1 J
100
<30
ND
10/12/2017
4
<1
<1
1.5 J
0.47 J
<1
<1
3.9 J
13 J
<1
<1
2.4 J
<1
<1
<1
2.5 J
<1
<1
<1
<1
<1
<1
0.66 J
<3
ND
11/29/2017
2,284
21
<5
340
76
16
<5
870
<100
14
<5
490
14
<5
<5
370
<5
<5
2.4 J
<5
<5
<5
73
<15
ND
11/5/2018
195
1.5
<1
40
12
0.96 J
<1
84
<20
<1
<1
2.3
<1
<1
<1
53
<1
<1
<1
<1
<1
0.46 J
1.8
<3
ND
9/17/2019
99
0.51 J
<1
20
4.5
<1
<1
28
<20
0.45 J
<1
22
3.3
<1
<1
20
<1
<1
<1
<1
<1
<1
1.3
<3
ND
PW-16S
7/22/1998
ND
ND
NA
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
10/30/2000
ND
<5
<5
<5
<5
<5
<5
<100
NA
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/6/2001
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/17/2003
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/19/2004
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/29/2006
6.5
<1
<1
<1
<1
<1
<1
<2
6.5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
9/26/2007
ND
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
PW-17
11/3/2000
160
<5
<5
<5
<5
<5
<5
160
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
12/20/2000
ND
<5/<2
<5/<2
<5/<2
<5/<2
<5/NA
<5/<10
<100/<100
NA/<100
<5/<2
<5/<10
<10/<10
<5/<2
<5/<2
<5/<2
<5/<10
<5/<2
<5/<2
<5/<2
<5/<2
<10/<2
<10/<5
ND
9/12/2001
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2002
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/22/2003
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/25/2004
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/29/2006
8.8
<1
<1
<1
<1
<1
<1
<2
8.8
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
9/27/2007
6.3
<1
<1
<1
<1
<1
<1
<2
6.3
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
3/5/2009
ND
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 12 of 14
n
v;
Sample
N
N
b
0
N
N
Sample I.D.
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b
q
b
F
3
n
n
v
3
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v
Date
0
0
0
0
0
3-
n
c,
m
F
0
a
0
S
S
3-
3-
3-
p
3-
O
3-
S
S
S_
3'
3
Q
O
O
O
O
O
O
A
y
p
O
S
O
O
K
fD
O
O
O
3
S
v
0
0
O'
0
0
'a
0
W
0
a
a
0
0
0
m
N
m
C
N
..
fD
..
(D
O
a
O
_
O
M
O
3
S
O
3
(D
O
M
O
3
S
fOD
a
O_
fOD
..
fOD
..
S_
:
C
O
S
S
S
S
S
-a
x
.r
N
O
N
S
O
S
S
N
O
S
C
S
S
O
O
O
0
Cl
3
D)
3
N
3
m
3
C)
3
C)
3
d
3
O
3
m
3
0:
m
3
N
3
D)
3
m
3
m
3
a
CD
3
M
3
m
3
M
3
3
O.
Iv
0
fp
(D
CD
M
M
N
I N
CD
I M
M
fD
I M
M
M
M
M
CD
M
M
N
M
M
U)
NC 2L Standard
NE
200
6
7
0.4
0.6
3
6000
1
0.3
50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
PW-18
11/7/2000
19
<5
<5
<5
<5
<5
<5
<100
NA
<5
<5
<10
<5
<5
<5
<5
<5
19.0
<5
<5
<10
<10
ND
12/20/2000
ND
<5/<2
<5/<2
<5/<2
<5/<2
<5/NA
<5/<10
<100/<100
NA/<100
<5/<2
<5/<10
<10/<10
<5/<2
<5/<2
<5/<2
<5/<10
<5/<2
<5/<2
<5/<2
<5/<2
<10/<2
<10/<5
ND
9/11/2001
24
<5
<5
<5
<5
<5
<5
<10
24.3
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/16/2003
204
<5
<5
<5
<5
<5
<5
<10
195
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
8.9
ND
8/19/2004
149
<5
<5
<5
<5
<5
<5
22.8
119
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
6.8
ND
10/1/2004
27
<5
<5
<5
<5
<5
<5
<10
27.4
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/29/2006
264
<1
<1
<1
<1
<1
<1
<2
151
<1
<1
<1
<
<1
1.7
<1
<1
1.2
<1
<1
<1
16.3
93.8
9/26/2007
194
<1
<1
<1
<1
<1
<1
<2
108
<1
<1
<1
<
<1
1.3
<1
<1
1.2
<1
<1
<1
12.0
71.1
3/12/2009
203
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
125
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
1.1
3.5
<1.0
<1.0
<1.0
<1.0
<1.0
9.8
63.7
3/31/2010
86
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
85.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
1.26
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
11 /7/2011
143
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<3.0
92.0
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
2.94
48.43
11 /26/2012
91
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
36.0
30.8
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
0.86
<0.5
<0.5
0.6
<0.5
<0.5
<0.5
6.73
24.5
1/21/2013
ND
<2.0
12/12/2013
31
<5
<5
<5
<5
<5
<0.5
5.05
<50
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<10
25.6
2/25/2014
ND
<2
12/9/2014
96
<1
<1
<1
<1
<1
<1
9.17
55
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
1
<1
<1
<1
6
30.7
1/29/2015
58
<1
<1
<1
<1
<1
<1
<2
35
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
4.9
18
10/26/2015
ND
<1
<1
<1
<1
<1
<1
<2
40 J
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
0.65 J
<1
<1
<1
1.2 J
19
11/15/2016
ND
<10
<10
<10
<10
<10
<10
<10
<200
<10
<10
<10
<10
8.3 J
<10
<10
<10
<10
<10
<10
<10
<10
<10
<30
ND
10/16/2017
ND
<1
<1
<1
<1
<1
<1
<2
20 J
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
6.7 J
11/7/20018
35
<1
<1
0.65 J
0.91 J
<1
<1
<2
20
<1
<1
0.42 J
<1
<1
<1
2.8
<1
<1
<1
<1
<1
1.3
<1
0.58 J
7.3
1/10/2019
24 J
<1
<1
0.65 J
<1
<1
<1
<2
17 J
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
1.3 J
5.2 J
9/17/2019
Not
Sampled
PW-19
11/6/2001
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/19/2002
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/16/2003
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/18/2004
98
<5
<5
<5
<5
<5
<5
97.8
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
10/1/2004
ND
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
8/29/2006
3.7
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
3.7
9/27/2007
5.0
<1
<1
<1
<1
<1
<1
<2
5.0
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<2
ND
3/11/2009
91
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
87.3
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
3.8
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
1/29/2015
<1
<1
<1
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
0.57 J
<1
<3
ND
PW-DR-1
9/8/2004
248
<5
<5
10.7
<5
<5
<5
164
<10
<5
40.2
16.6
<5
16.4
<5
<5
<5
<5
<5
<5
<5
<5
ND
9/23/2004
268
<5
<5
5.6
<5
<5
<5
209
<10
<5
31.3
13.6
<5
8.3
<5
<5
<5
<5
<5
<5
<10
<5
ND
10/8/2004
249
<5
<5
5.6
<5
<5
<5
213
<10
<5
30.8
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
2/25/2009
1,848
54.4
<1.0
213
98.8
7.7
<1.0
579
7.5
11.8
<1.0
400
58.3
<1.0
<1.0
314
2.2
<1.0
3.5
23.8
1.2
1.3
<1.0
71.2
ND
PW-SIS1
8/25/2004
12,848
201
<5
3,370
765
223
<5
2,500
<10
69.5
39.0
<10
<5
5,060
<5
110
49.9
<5
<5
69.8
376
15.1
ND
3/9/2009
9,940
473
3.7
1,990
1,310
139
1.4
1,230
37.7
97.4
<1.0
68.1
38.8
3.7
<1.0
3,510
1 <1.0
6.0
121
3.2
49.0
263
555
39.9
ND
W-1
1/29/1997
3
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
3 J
NA
ND
ND
ND
ND
ND
ND
ND
ND
ND
9/27/2000
ND
<5
<5
<5
<5
<5
<5
<100
NA
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/10/2001
<5
<5
<5
<5
<5
<5
12.4
<10
<5
<5
<10
<5
<5
<5
<5
8.4
<5
<5
<5
<10
<5
ND
9/18/2002
20
<5
<5
<5
<5
<5
<5
11.5
<10
<5
<5
<10
<5
<5
<5
<5
8.2
<5
<5
<5
<10
<5
ND
9/17/2003
86
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
76.4
<5
<5
9.7
<10
<5
ND
8/17/2004
43
<5
<5
<5
<5
<5
<5
<10
<10
<5
<5
<10
<5
<5
<5
<5
33.7
<5
<5
9.3
<10
<5
ND
3/3/2009
25
<1.0
<1.0
<1.0
3.3
<1.0
<1.0
<2.0
7.7
<1.0
<1.0
<1.0
<1.0
1.1
<1.0
<1.0
<1.0
<1.0
11.1
<1.0
<1.0
1.9
<1.0
<2.0
ND
W-2
1/30/1997
87,240
30,000
ND
12,000
11,000
960 J
ND
ND
2,200 J
410 J
ND
ND
1,500 J
ND
ND
ND
20,000
970 J
1,200
ND
1,200
5,300
500 J
ND
DUP-3(W-2)
1/28/1997
79,260
27,000
ND
11,000
9,500
930 J
ND
ND
2,300 J
410 J
ND
ND
1,400 J
ND
ND
ND
19,000
910 1
1,200
ND
1,100
4,300
210 J
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 13 of 14
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NE
200
6
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1
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50
3,000
70
3
70
600
5
0.7
600
100
3
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500
-
W-4
2/6/1997
1,624
47.0
ND
640
86.0
23 J
ND
ND
6 J
30.0
8 J
35 J
ND
NA
7 J
ND
ND
7 J
ND
ND
280
5 J
450
9/27/2000
525
14.0
<5
200
57.0
8.4
<5
<100
NA
8.7
<5
<10
<5
170
<5
<5
<5
<5
6.7
<5
60.0
<10
ND
9/10/2001
49
<5
32.7
<5
<5
<5
<5
16.5
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/17/2002
18
<5
<5
<5
<5
<5
<5
18.2
<10
<5
<5
<10
<5
<5
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/17/2003
694
27.9
<5
135
56.9
10.9
<5
162
<10
<5
<5
<10
<5
248
<5
<5
<5
<5
<5
8.1
45.2
<5
ND
8/17/2004
3,157
136
<10
432
331
35.2
<10
547
<20
17.0
14.5
<20
<10
1,010
<10
<10
13.0
<10
<10
10.4
91.2
<10
ND
W-4A
1/28/1997
75,370
13,000
ND
11,000
5,700
540
ND
ND
ND
890 J
ND
ND
ND
NA
ND
39,000
ND
1,300
ND
ND
2,600
280 J
1,060
9/27/2000
15,940
380
<5
4,300
1,500
160
<5
2,100
NA
230
67
50
<5
4,500
12.0
1,300
38.0
57
260
42.0
870
66.0
8.3
9/10/2001
37,215
619
<5
10,400
3,560
316
<5
2,770
<10
<5
125
111
<5
12,400
40.4
4,350
52.6
126
19.3
43.8
2,100
169
13.1
9/17/2002
31,439
515
<5
9,120
2,490
207
<5
1,950
<10
273
105
95.7
<5
10,500
24.4
3,570
38.5
59.4
10.9
28.5
2,330
122
ND
9/17/2003
5,351
83
<5
1,350
544
68.1
<5
1,090
<10
73
29.1
18.5
<5
1,740
<5
<5
16.8
15.1
<5
16
286
22.4
ND
8/17/2004
19,357
<100
<100
5,390
2,070
182
<100
1,870
<200
225
111
<100
<100
7,330
<100
831
<100
<100
<100
<100
1,230
118
ND
2/27/2009
6,307
73.4
<1.0
1,240
541
57.9
<1.0
942
13.4
98.4
<1.0
67.4
163
<1.0
3.3
2,260
7.3
78.8
8.3
11.3
6.5
12
686
36.8
ND
3/31/2010
10,920
401
<1.0
1,880
995
73.6
1.19
1,010
32.7
129
<1.0
91.9
238
<1.0
1.98
3,590
16.1
918
43.5
72.5
6.26
89
1,330
ND
ND
11/2/2011
41,390
216
<50
5,340
3,750
363
<50
520
<500
861
<50
469
7,290
<50
<50
10,300
<50
1,130
<50
307
<50
83
11,000
281
ND
11/19/2012
4,144
28.7
<0.5
335
296
21.9
<0.5
1,600
<5
65.3
3.77
30
241
<0.5
0.95
693
3.28
155
1.48
16
2.87
4.27
622
20.11
3.74
12/17/2013
59,696
513
<50
7,580
3,260
318
<50
1,270
<500
843
<50
332
6,790
<50
<50
14,400
<50
15,300
<50
249
<50
<50
8,580
261
ND
12/8/2014
37,661
430
<100
4,700
2,700
360
<100
2,100
<100
560
<100
270
3,600
<100
<100
8,800
<100
6,300
<100
220
41
140
7,000
220
220
10/27/2015
8,952
270
<100
1,400
640
<100
<100
962
<500
210
<100
110
540
<100
<100
2,500
<100
<100
<100
120
<100
76 J
2,200
<300
ND
11/16/2016
9,410
380
<100
2,000
690
67
<100
660
<2000
260
<100
140
560
<100
<100
2,400
<100
220
<100
72 J
<100
92 J
2,100
<300
ND
10/11/2017
2,832
24
<10
440
190
36
<10
630
<200
40
<10
39
66
<10
<10
570
<10
<10
4.3 J
<10
<10
5.3
780
12
ND
10/31/2018
1,400
33
<5
260
110
7.6
<5
210
<100
14
<5
11
30
<5
<5
500
<5
<5
3.4 J
<5
2.4 J
28
190
<15
ND
9/11/2019
435
12
<1
83
33
2.8
<1
54
<20
7.5
<1
4.4
13
<1
<1
130
<1
0.45 J
0.81 J
<1
1.3
6
88
<3
ND
W-4B
2/4/1997
117,470
20,000
ND
13,000
8,700
810 J
ND
ND
4,500 J
1,200 J
ND
ND
ND
ND
ND
ND
61,000
550 J
2,800
ND
ND
4,200
710 J
ND
W-5
8/7/1996
467,000
110,000
ND
27,000
21,000
ND
ND
19,000
2,100 J
1,700
9,400 J
ND
ND
ND
140,000
6,900
13,000
ND
ND
36,000
3,900 J
77,000
2/24/1997
415,300
98,000
ND
26,000
19,000
2,000
ND
ND
34,000
2,200 J
1,800
9,100 J
ND
ND
1,100 J
130,000
5,600
15,000
ND
24,000
33,000
5,200
9,300
10/30/2000
402,208
95,000
91.0
22,000
31,000
1,100
17.0
24,000
NA
1,000
1,200
2,200
190
72,000
760
100,000
3,500
8,900
340
11,000
25,000
2,540
370
9/10/2001
378,680
144,000
<5
14,000
33,300
<5
<5
13,800
<10
<5
<5
<10
<5
53,900
<5
63,200
7,710
9,270
<5
27,000
12,500
<5
ND
9/19/2002
672,790
121,000
<5,000
45,400
122,000
<5,000
<5,000
14,300
<10,000
7,780
11,100
<10,000
<5,000
74,300
5,880
93,100
28,900
35,300
<5,000
38,300
39,500
28,400
7,530
9/17/2003
367,940
135,000
<5,000
9,220
31,800
<5,000
<5,000
11,300
<10,000
<5,000
<5,000
<10,000
<5,000
56,400
<5,000
81,900
6,340
7,580
<5,000
28,400
<10,000
<5,000
ND
8/18/2004
375,700
177,000
<5000
5,290
36,600
<5000
<5,000
4,110
<10,000
<5,000
<5,000
<10,000
<5,000
41,400
<5,000
48,900
10,800
10,400
<5,000
41,200
<10,000
<5,000
ND
3/3/2009
170,238
66,700
75.8
3,720
15,500
289
<50.OX
1,860
1,380
1,420
<50
1,000
111
121
<50.OX
30,800
<50.OX
10,900
3,700
3,400
70.0
25,900
1,040
1,940
311.0
W-6
2/5/1997
123,360
23,000
ND
14,000
8,500
20,000
ND
ND
3,400 J
ND
ND
15,000
ND
ND
ND
ND
260 J
19,000
2,700
3,000
ND
2,400
5,100
1,400
2,800
DUP-1 (W-6
8/7/1996
143,900
27,000
ND
16,000
10,000
23,000
ND
2,800
ND
ND
18,000
ND
ND
ND
ND
ND
21,000
6,200
3,300
ND
4,000
6,500
1,600
4,500
W-6A
2/5/1997
739,000
10,000
ND
65,000
16,000
48,000
ND
ND
150,000
ND
21,000
ND
ND
ND
ND
310,000
3,200 J
12,000
ND
ND
6,800 J
ND
97,000
9/28/2000
838,040
31,000
280
69,000
24,000
71,000
<5
81,000
<5
17,000
940
160
100,000
550
410,000
3,200
14,000
660
3,100
9,900
1,950
300
W-6B
2/5/1997
238,400
59,000
ND
23,000
14,000
19,000
ND
ND
14,000
ND
ND
18,000
ND
ND
ND
ND
55,000
4,700
5,700
ND
11,000
1,000 J
1,000 J
13,000
W-13A
1/31/1997
1,688
66.0
ND
230
110
6 J
ND
990
120
ND
ND
ND
5J
ND
ND
ND
27.0
90
ND
ND
30
14J
ND
ND
W-18
2/3/1997
6,781
500
ND
820
930
960
ND
ND
ND
ND
ND
ND
ND
71 J
ND
ND
610
1,500
ND
ND
930
460
ND
ND
3/5/2009
9,932
60.0
3
741
396
17.4
<1.0
1,350
19.5
9.9
7.2
4.4
11.7
77.9
<1.0
4,050
<1.0
7.2
490
<1.0
13.5
1,850
819
3.8
ND
W-20
1/31/1997
19.0
4 J
ND
4 J
4 J
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
5
ND
ND
2 J
ND
ND
ND

TABLE 5
GROUND WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICAL/RIVERDALE DRIVE LANDFILL SITE
Page 14of14
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200
6
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1
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50
3,000
70
3
70
600
5
0.7
600
100
3
0.03
500
W-21
1/31/1997
1,232
340
ND
130
210
110
ND
240 J
ND
ND
ND
18 J
3 J
ND
ND
3 J
47.0
ND
ND
54.0
77.0
ND
ND
9/28/2000
1,494
190
<5
120
140
74.0
<5
520
NA
<5
<5
<10
<5
220
<5
<5
97.0
<5
<5
73.0
60.0
<10
ND
9/10/2001
1,336
129
<5
101
140
57.8
<5
407
<10
<5
<5
<10
<5
271
<5
<5
116
<5
<5
72.7
41.4
<5
ND
9/17/2002
1,775
127
<5
188
163
36.2
<5
458
<10
5.2
<5
<10
<5
498
<5
<5
102
<5
<5
98.0
100
<5
ND
9/17/2003
1,890
106
<5
140
151
44.6
<5
743
<10
<5
<5
<10
<5
384
<5
<5
140
<5
<5
105
76.7
<5
ND
8/17/2004
1,761
71.2
<10
114
124
47.4
<10
821
<20
<10
<10
<20
<10
333
<10
<10
95.2
<10
<10
81.5
73.5
<10
ND
9/24/2009
3,701
313
1.2
1 518
390
38.9
1 <1.0
678
16.0
12.6
<1.0
1 9.8
4.9
5.3
1 <1.0
1,210
1 <1.0
<1.0
108
<1.0
1 3.3
170
222
<2.0
ND
W-23A
1/30/1997
4,600
ND
ND
ND
ND
ND
ND
ND
4,600
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
7/17/1998
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
3/4/2009
115
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
106
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
3.4
<1.0
<1.0
3.1
<1.0
<1.0
2.6
<1.0
<2.0
ND
W-23B
1/22/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
W-24
1/31/1997
2,109
200
ND
190
330
ND
ND
ND
ND
ND
ND
ND
ND
11 J
ND
ND
54
440
ND
ND
710
160
14 J
ND
UP-2 (W-2
1/31/1997
1,921
180
ND
180
310
ND
ND
ND
ND
ND
ND
ND
ND
10 J
ND
ND
49
400
ND
ND
630
150
12 J
ND
7/16/1998
1,943
ND
100 J
160
240 D
ND
ND
ND
ND
3 J
ND
ND
ND
8
ND
ND
12
520 D
ND
ND
690 D
190
20.0
ND
W-25
8/7/1996
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1/27/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
W-29
2/5/1997
1,688,000
120,000
ND
7,400 J
29,000
580,000
ND
ND
240,000
ND
ND
49,000
ND
ND
ND
ND
290,000
13,000 J
10,000 J
ND
150,000
ND
ND
230,000
BD-1
3/29/2010
235
<1.0
<1.0
14.7
<1.0
<1.0
<5.0
208
<5.0
<1.0
<1.0
1.74
2.28
<1.0
<1.0
5.72
<1.0
1.48
<1.0
<1.0
<1.0
<1.0
1.34
ND
ND
DUP-02
3/31/2010
148
<1.0
<1.0
31.0
1.60
3.45
<1.0
28.6
<5.0
<1.0
<1.0
35.4
9.90
<1.0
<1.0
24.1
<1.0
2.00
1.55
<1.0
<1.0
2.87
7.67
ND
ND
LCHT-COMP
3/30/2010
904
<2.0
<2.0
82.2
34.4
8.87
<2.0
416
32.4
8.00
<2.0
136
24.7
<2.0
<2.0
95.8
2.60
5.09
<2.0
6.24
<2.0
6.69
44.9
ND
ND
PW-SF1
4/2/2010
11,985
<2.0
<2.0
114
<2.0
<2.0
<2.0
8,410
247
20
<2.0
1,190
1,340
<2.0
<2.0
2.4
11
175
<2.0
447
4
<2.0
25
ND
ND
11/3/2011
34,627
1,840
32.6
2,990
3,670
1,240
<5
1,300
57.2
32.5
<5
1,450
1,580
250
<5
13,100
<5
251
211
1,070
23.3
1,410
3,920
54.0
145.7
11/20/2012
8,577
136
<50
480
5.7
135
<50
4,310
<500
<50
<50
298
<50
<50
<50
2,230
<50
<50
<50
110
<50
123
749
<50
ND
12/9/2013
46,400
1,250
<50
3,700
6,190
1,060
<50
3,940
<500
<50
<50
1,710
1,130
276
19,900
<50
<50
<50
700
<50
1,470
4,920
<100
154
12/8/2014
43,302
1,100
<200
3,500
4,200
1,300
<200
3,510
<1000
<200
<200
2,000
1,200
200
<200
19,000
<200
<200
320
680
<200
1,700
4,500
<600
92
10/27/2015
41,479
1,100
<100
3,200
3,600
780
<100
3,550
<500
<100
<100
2,100
790
160
<100
18,000
<100
<100
420
800
<100
2,200
4,700
<300
79 J
11/17/2016
48,530
1,800
<500
4,400
4,900
780
<500
3,600
<10000
<500
<500
2,200
450 J
280 J
<500
22,000
<500
<500
660
690
<500
2,800
4,700
<1500
ND
10/11/2017
43,254
1,300
<100
3,900
4,000
880
<100
3,600
<2000
<100
<100
1,900
340
180
<100
19,000
<100
<100
650
530
<100
2,900
4,000
43 J
74
10/30/2018
40,063
1,200
<100
3,400
3,600
660
<100
2,800
<2000
<100
<100
2,100
<100
110
<100
18,000
<100
<100
680
660
<100
3,100
3,600
45 J
63 J
9/10/2019
43,240
3,100
<200
3,500
4,100
600
<200
3,200
<4000
<200
<200
1,800
<200
120
<200
20,000
<200
160
830
530
<200
2,900
2,400
<600
ND
EB-1
4/2/2010
19
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
15.5
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
3.15
<1.0
<1.0
<1.0
<1.0
<1.0
ND
ND
FB-1
4/2/2010
25
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
1 21.4
<1.0
<1.0
I <1.0
<1.0
<1.0
I <1.0
<1.0
<1.0
3.55
<1.0
I <1.0
<1.0
<1.0
I <1.0
ND
ND
Crutchfield
(potable well
12/1/1998'
ND
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
NA
<2.0
<0.5
<0.5
<0.5
<2.0
<0.5
<2.0
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
NA
<0.5
ND
3/11/2009
2.5
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
2.5
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
ug/l = micrograms per liter
J = Estimated value
B = Analyte detected in associated method blank as well as sample
ND = Not detected NA = Not Analyzed
1 - Sample collected and analyzed by North Carolina Division of Waste Management
Bold type indicates value exceeds NC 2L ground water standard
Values separated by slash 0 indicate split sample results
NC 2L Standard = North Carolina 2L ground water quality standard

TABLE 6 Pagel of 3
SURFACE WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICALIRIVERDALE DRIVE LANDFILL SITE
c
c
c
0
�_
s
x
Sample
Sample Date
o
s
0
s
0
s
00
0
0
0
'o
n
1P
m
s
o
0
0
-
m
W
Descri [ion
p
o
o
'o
0
o
D
0
3
o
z
'o
T
o
s
>•
>•
0
3
$
0
-
0
=
0
m
x
.o1p.
0
m
..
a
p
1D
a
0
o
(ug/1)
(ug/1)
u /I
a /I
a /I
u /I
u /I
(ug/1)
(ug/1)
u /I
u /I
u /1)
(ug/1)
(u°/I)
(u /I
u /I
u /I
_
u /I
u /I
NC 2B
Ste. WS-IV
2500
6700
330
0.38
0.35
2000
1.19
130
12
NE
330
2.6
0.7
11
140
2.5
0.025
670
20,000
Northern Intermittent
Stream
SW-1
4/30/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
11/2/2000
<5
<5
<5
<5
<100
NA
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/14/2001
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/02
Dry
_
_
_
_
__
__
__
_
ND
__
__
__
__
__
_
_
__
__
9/16/2003
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/23/2004
c5
c5
c5
c5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
12/20/2005
Dry
-
-
--
-
--
--
--
-
-
--
8/29/2006
Dry
_--
9/27/2007
Dry
_--
5/13/2009
Dry
--
-
--
-
--
--
--
-
12/13/2013
Dry
12/8/2014
Dry--
10/22/2015
Dry--
11/17/2016
Dry--
2/1/2017
Dry--
10/13/2017
Dry--
11/29/2017
Dry--
11/7/2018
<1
c1
<1
<1
12
<20
<i
<1
c1
c1
<1
<1
<1
<1
<1
<1
c1
<3
<5
1/10/2019
<1
c1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
9/18/2019
Drry
SW-2
4/30/1997
ND
ND
ND
ND
ND
ND
3J
S
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
7/15/1998
ND
ND
ND
ND
ND
ND
6
12
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
11/2/2000
<5
c5
<5
<5
420
NA
<5
10
<10
ND
<5
<5
<5
<5
<5
<5
<10
c10
ND
9/14/2001
<5
c5
<5
<5
353
<10
<5
7.6
c10
ND
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/24/2002
<5
c5
<5
<5
258
c10
<5
7.7
c10
ND
<5
<5
<5
<5
<5
<5
<10
<5
c10
11/26/2002
NA
NA
NA
NA
293
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/15/2003
c5
c5
c5
c5
305
c10
c5
9.6
c10
ND
c5
c5
c5
c5
c5
c5
c10
c5
c10
11/16/2004
<5
<5
<5
<5
233
<10
<5
8.7
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
12/20/2005
<5
<5
<5
<5
64
14.7
<5
6.2
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/29/2006
<1
<1
<1
<1
218
<5
<1
9.1
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
Split(8270)
8/29/2006
NA
NA
NA
NA
390
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/27/2007
<1
<1
<1
<1
176
<5
<1
9.4
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
5/13/2009
<i
<1
<1
,1
17.1
7.1
<1
3.8
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<5
4/1/2010
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
<5.0
11/3/2011
<0.5
<0.5
<0.5
<0.5
6.2
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<5
11/20/2012
Dry
--
-
-
--
-
-
--
--
12/13/2013
Dry
_
_
_
12/8/2014
Dry
-
-
-
--
--
p8i7u6
--
-
-
--
--
-
-
--
-
-
--
--
10/22/2015
Dry
--
-
-
--
-
-
--
--
11/17/2016
Dry
_
_
_
2/1/2017
Dry
--
-
-
--
-
-
--
--
10/13/2017
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
11/29/2017
Dry
-
--
-
-
--
-
-
--
--
11/7/2018
<i
<1
<1
<1
22
<20
<1
<i
<1
<1
<i
<1
<1
<1
<1
<1
<1
<3
<5
1/10/2019
<1
<1
<1
<1
15
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
9/18/2019
Dry
Southern Intermittent
Sti
SW-3
4/30/1997
66
73
33
6
ND
ND
3"
ND
51
ND
ND
110
4J
41
ND
21
19
ND
ND
7/15/1998
ND
5
ND
ND
NA
ND
ND
ND
ND
ND
4J
ND
ND
ND
ND
ND
ND
ND
ND
11/2/2000
24
38
14
c5
600 B
NA
c5
c5
c10
ND
45
10
c5
c5
c5
c5
c10
c10
ND
9/14/2001
<5
<5
c5
<5
281
c10
c5
c5
c10
ND
c5
c5
c5
c5
c5
c5
<10
<5
ND
9/24/2002
<5
14.6
5.1
<5
69.7
c10
<5
<5
c10
ND
17.0
<5
<5
<5
<5
<5
<10
<5
<10
11/26/2002
NA
NA
NA
NA
151
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/16/2003
13
42.4
16.8
<5
202
c10
<5
<5
c10
ND
50.4
7.2
c5
c5
<5
c5
<10
<5
<10
8/23/2004
c5
13.3
<5
<5
546
c10
c5
8.7
16.4
ND
6.9
<5
c5
c5
<5
<5
<10
<5
c10
8/25/2004
c5
31.7
9
<5
115
c10
c5
<5
c10
ND
33.6
<5
c5
<5
<5
<5
<10
<5
<10
12/20/2005
39.1
96.3
50
<5
26.3
c10
c5
c5
c10
ND
182
111
c5
c5
<5
c5
20.7
<5
c10
8/29/2006
11.8
59.3
24
3.5
327
<5
c1
c1
3.2
ND
88.6
5.2
1.1
c1
<1
1.7
7.4
<2
ND
9/27/2007
Dry
-
--
--
-
-
--
-
-
--
--
5/13/2009
32.3
84.1
52.4
4.1
144
10.2
2.5
1.4
10.5
c1
178
7.6
2.1
<1.0
c1.0
7.8
28.5
<1
<5
4/1/2010
21.7
52.6
36.6
<1.0
66.9
8.01
1.69
1.01
11.2
<1.0
127
51
1.32
<1.0
c1.0
5.58
23.7
ND
c5.0
11/3/2011
20.6
37.3
24
1.58
38
c5
c0.5
c0.5
19.9
<0.5
76.5
4.79
<0.5
<0.5
c0.5
10.6
25
c0.5
<5
11/20/2012
27.1
50.7
29.3
<0.5
115
c5
c0.5
0.62
19
<0.5
105
1.31
2.62
<0.5
0.58
14
23.2
c0.5
<5
12/11/2013
28.7
26.6
33.2
0.74
10
<5
1.83
0.73
10.4
<0.5
85.1
c0.5
1.4
<0.5
0.75
14.6
18.8
c0.5
<5
12/8/2014
8.2
22
10
<1
96.8
c5
<1
c1
8.8
c1
42
15
1.2
c1
<1
4.8
11
<3
<5
10/22/2015
27
81
37
2.7
104
c5
0.88 J
ci
24
c1
140
81
4.8
c1
0.87 J
19
28
c3
c5
11/17/2016
<1
c1
<1
<1
16
28 J
<1
<1
c1
c1
0.44 J
<1
c1
c1
<1
c1
<1
c3
c5
2/1/2017
NA
NA
NA
NA
12
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
10/13/2017
<1
c1
<1
<1
9.7J
c20
<1
<1
c1
c1
<1
<1
<1
<1
<1
<1
<1
<3
<5
11/29/2017
NA
NA
NA
NA
15
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
11/7/2018
<1
1.2
c1
c1
13
c20
<1
<1
c1
c1
2.3
<1
c1
<1
<1
c1
c1
<3
<5
9/18/2019
ci
<1
c1
c1
1.7
c20
ci
ci
c1
c1
<1
<1
<1
<1
<1
<1
<1
<3
<1
SW-4
4/30/1997
4J/5J
30/34
3J/3J
3J/4J
NDMD
12JI23J
1J/iJ
62169
15J/16J
ND
NDMD
10111
ND/ND
NDMD
ND/ND
NDMD
8J/9J
ND/ND
ND/ND
7/20/1998
ND
16
ND
4J
NA
ND
ND
77
36
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
11/2/2000
c
c
c
c
1100NA
c5
48
34
ND
c5
c5
c5
c5
<5
<5
10
<10
ND
9/14/0
5
5
5
5
806
c10
5
16.5
<10
ND
5
5
5
5
ccc1201
5
5
0
<5
ND
9/24/2002
<5
c5
<5
<5
480
c10
<5
19.3
c10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
11/26/2002
NA
NA
NA
NA
448
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/15/2003
<5
7.7
<5
<5
118
11
<5
12.2
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
c10
8/25/2004
<5
c5
c5
<5
592
c10
<5
38.0
18.2
ND
<5
<5
Ic5
<5
<5
<10
<5
c10
12/20/2005
6.4
24.9
7.3
<5
172
17.3
<5
22.4
c10
ND
36.5
5.8
c5
c5
<5
I
<10
<5
c10
8/29/2006
<1
1.2
c1
<1
1040
<5
<1
9.5
8.1
ND
<1
<1
c1
<1
<1
<1
c1
<2
ND
Split(8270)
8/29/2006
NA
NA
NA
NA
1200
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/27/2007
<1
c1
<1
c1
24.1
<5
ci
ci
c1
ND
ci
ci
c1
c1
ci
c1
c1
c2
ND
5/13/2009
ci
c1
c1
c1
8.4
8.4
ci
ci
c1
1.7
ci
ci
c1
c1
ci
c1
c1
c1
<5
4/1/2010
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
c1.0
c1.0
<1.0
<1.0
<1.0
<1.0
<1.0
c1.0
<1.0
<1.0
ND
<5.0
11/3/2011
72
443
126
32.6
110
10.6
14.2
358
141
<0.5
440
1.21
3.24
0.74
c0.5
13.5
371
4.93
<5
11/20/2012
<0.5
2.1
c0.5
c0.5
22.7
c5
c0.5
5.9
c0.5
<0.5
1.56
c0.5
c0.5
<0.5
c0.5
<0.5
<0.5
c0.5
<5
12I13/2013
<0.5
<0.5
c0.5
c0.5
c2.0
c5
c0.5
c0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
c0.5
<0.5
<0.5
c0.5
<5
12/8/2014
ci
c1
c1
c1
3.3
<5
<1
<1
c1
c1
c1
<1
<1
<1
ci
c1
c1
c3
c5
10/22/2015
ci
c1
c1
<1
4.1 J
<5
ci
0.82 J
c1
c1
ci
<1
c1
<1
ci
c1
c1
c3
c5
11/21/2016
<1
<1
<1
<1
18
<10
ci
1.3J
0.70J
c1
<1
<1
c1
<1
<1
<1
<1
<3
<5
2/1/2017
NA
NA
NA
NA
<2.0
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
10/13/2017
86
710
280
63
1700
c200
20
840
120
<10
1100
c10
6.7 J
4.8 J
4.3 J
4.1 J
1000
9.1
<0
11/29/2017
120
770
370
58
1500
c200
24
950
65
<10
1400
c10
15
6.7
4.1
22
970
14
<50
11/7/2018
<1
25
13
2.5
48
120
<1
23
2.4
<1
40
<1
<1
<1
<1
<1
45
<3
<5
9/18/2019
51
400
120
34
1800
c200
<10
820
250
<10
540
1 c10
4.4
4.9 J
7.1 J
420
7.7 J
<0

TABLE 6 Page 2 of 3
SURFACE WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICALIRIVERDALE DRIVE LANDFILL SITE
x
Sample
s
s
s
0
0
n
1P
m
s
0
Descri [ion
Sample Date
o
0
0
'o
00
0
'o
o
'o
0
-
m
W
p
o
o
W
0
o
0
D
3
0
3
�
0
$
z
o
-
T
0
o
s
g
>
W
1
A
0
>
e
�
a
a
1D
o
0
(u /I)
(u /I
u /I
a'
(a/I
N3
u /I
u /I
u /I
u /I
u /I
u /I
u /I
u /I
ua/I
a /I
u /I
(a/I
u /I
u /I
u /I
NC 2B
Std. S.IV)
2500
6700
330
0.38
0.35
2000
1.19
130
12
NE
330
2.6
0.7
11
140
2.5
0.025
670
20,000
SW-5
4/30/1997
ND
ND
ND
ND
ND
8J
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
11/2/2000
15
<5
<5
<5
<100
NA
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/14/2001
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/24/2002
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
11/26/2002
NA
NA
NA
NA
<10
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/16/2003
<5
<5
<5
<5
12.4
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/25/2004
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
12/20/2005
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/29/2006
<1
<1
<1
<1
<2
51.7
<1
<1
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
9/27/2007
<1
<1
<1
<1
<2
<5
<1
<1
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
5/13/2009
8.7
8.6
6.4
<1
25.4
5.3
<1
<1
<1
<1
39.4
<1
3.3
<1
<1
9.0
8.2
<1
<5
4/1/2010
11.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
<5.0
11 /3/2011
<0.5
<0.5
<0.5
<0.5
<3.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<5
11/20/2012
<0.5
<0.5
<0.5
<0.5
6.97
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<5
12/16/2013
<0.5
<0.5
<0.5
<0.5
13.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
10.5
12/8/2014
<1
<1
<1
<1
2.26
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
10/22/2015
<1
<1
<1
<1
1.8 J
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
11/17/2016
<1
<1
<1
<1
3.1 J
<10
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
2/1/2017
NA
NA
NA
NA
8.3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
10/1312017
<1
<1
<1
<1
14.0
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
11/29/2017
NA
NA
NA
NA
8.6
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
11/7/2018
<1
<1
<1
<1
23.0
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
9/18/2019
1 <1
<1
<1
I <1
5.8
<20
1 <1
<i
I <1
I <1
0.63 J
<1
<1
<1
<1
<1
0.46 J
<3
<5
Randleman
Lake (rorrn.riy m.
D-p Ri-)
SW-6
5/1/1997
ND
ND
ND
ND
ND
6J
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
11/2/2000
<5
<5
<5
<5
<100
NA
<5
<5
<10
ND
<5
15
<5
<5
<5
<5
110
<10
ND
9/14/2001
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
15
<5
<5
<5
<5
<10
15
ND
9/24/2002
<5
<5
<5
<5
11.5
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
110
15
<10
11/26/2002
NA
NA
NA
NA
<10
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/16/2003
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
15
15
<5
<5
<5
<5
110
15
<10
8/25/2004
c5
<5
c5
<5
133
<10
<5
<5
c10
ND
<5
<5
c5
<5
<5
<5
<10
15
<10
12/20/2005
<5
<5
<5
<5
11.4
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/29/2006
It
c1
<1
<1
<2
<5
It
It
<1
ND
It
<1
c1
<1
It
<1
<1
<2
ND
Split(8270)
8/29/2006
NA
NA
NA
NA
<3.3
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/27/2007
<1
<1
<1
<1
<2
<5
<1
<1
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
Upper
2/25/2009
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
ND
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
Mid
2/25/2009
<11.0
<1.0
1.0
<1
1.0
<1
<
<
1.0
<1<1
1.0
1.0
ND
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
Mid
5/13/2009
.0
1.0
.0
.0
2.0
5.0
.0
.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<5
Upper
5/13/2009
<1.0
<1.0
<1.0
<1.0
<2.0
8.1
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<5
Surface
4/1/2010
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
<5.0
Bottom
4/1/2010
<1.0
<1.0
<1.0
<1.0
4.02
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
<5.0
Surface
11/3/2011
<0.5
<0.5
<0.5
<0.5
<3.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<5
Surface
11/21/2012
<0.5
<0.5
<0.5
<0.5
3.73
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
Bottom
11/21/2012
<0.5
<0.5
<0.5
<0.5
<2.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
Surface
12/13/2013
<0.5
<0.5
<0.5
<0.5
9.29
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<5
Bottom
12/13/2013
<0.5
<0.5
<0.5
<0.5
<2.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<5
Surface
12/15/2014
<1
<1
<1
<1
<2
<5
<1
<i
<1
<1
<1
<i
<1
<1
<1
<1
<1
<3
<5
Bottom
12/15/2014
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
10/22/2015
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
10/22/2015
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
11/21/2016
<1
<1
<1
<1
<2
<10
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
11/21/2016
<1
<1
<1
<1
<2
<10
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
2/1/2017
NA
NA
NA
NA
<2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Bottom
2/1120,7
NA
NA
NA
NA
<2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
10/1312017
<i
<1
<1
<1
13.0
<20
<i
<i
<1
<1
<i
<i
<1
<1
<i
<1
<1
<3
<5
Bottom
10/13/2017
<i
<1
<1
<1
14.0
<20
<i
<i
<1
<1
<i
<i
<1
<1
<i
<1
<1
<3
<5
Surface
11/29/2017
NA
NA
NA
NA
<2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Bottom
11/29/2017
NA
NA
NA
NA
<2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
11/7/2018
<i
<1
<1
<1
<2
<20
<i
<i
<1
<1
<i
<i
<1
<1
<i
<1
<1
<3
<5
Bottom
11/7/2018
<1
<1
<1
<1
<2
<20
<1
<1
11
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
9/18/2019
<1
<1
<1
<1
1.6 J
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
9/18/2019
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
SW-7
5/2/1997
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
11/3/2000
<5
<5
<5
<5
<100
NA
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<10
ND
9/13/2001
<5
<5
<5
<5
40.5
<10
<5
<5
23
ND
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/24/2002
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
11/26/2002
NA
NA
NA
NA
<10
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/15/2003
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/23/2004
c5
c5
c5
c5
c10
<10
c5
c5
<10
ND
c5
c5
<5
<5
c5
<5
c10
c5
<10
12120/2005
<5
<5
<5
<5
<10
10.7
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/29/2006
<1
c1
<1
<1
4.3
<5
ci
2
<1
ND
ci
ci
<1
<1
<1
<1
<1
<2
ND
9-27-200
It
<1
<1
<1
23.2
5.0
It
2
<1
ND
<1
<1
<1
<1
It
<1
<1
<2
ND
Upper
2/25/2009
c11.0
c11..0
c11..0
c11.0
c2.0
c5.0
c11.0
c11.0
<11.0
ND
<11.0
<11.0
<11.0
c11.0
c1.0
c10
c1.0
c2.0
ND
Mid
22009
/25/
0
0
0
0
20
50
0
0
0
ND
10
0
0
0
10
1.0
10
20
ND
Mid
5/13/2009
<1.0
<10
<10
<1.0
<2.0
5.3
<1.0
c1.0
c1.0
<1.0
<1.0
<1.0
<1.0
<1.0
c1.0
<1.0
<1.0
c1.0
<5
Upper
5/13/2009
c1.0
c1.0
c1.0
c1.0
c2.0
7.0
<1.0
c1.0
c1.0
<1.0
<1.0
<1.0
<1.0
<1.0
c1.0
<1.0
<1.0
c1.0
<5
Surface
4/1/2010
c1.0
c1.0
c1.0
c1.0
c2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
c1.0
<1.0
<1.0
ND
c5.0
Bottom
4/1/2010
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
c1.0
<1.0
<1.0
ND
c5.0
Surface
11/3/2011
c0.5
c0.5
<0.5
c0.5
<3.0
c5
c0.5
c0.5
c0.5
c0.5
c0.5
<0.5
<0.5
c0.5
c0.5
c0.5
c0.5
c0.5
<5
Surface
11/21/2012
c0.5
c0.5
0.88
c0.5
9.10
c5
c0.5
1.11
c0.5
c0.5
c0.5
c0.5
c0.5
c0.5
c0.5
c0.5
c0.5
c0.5
c0.5
Bottom
11/21/2012
c0.5
c0.5
c0.5
c0.5
9.88
c5
c0.5
0.94
c0.5
<0.5
<0.5
c0.5
c0.5
<0.5
c0.5
<0.5
<0.5
c0.5
c0.5
Surface
12I13/2013
c0.5
c0.5
c0.5
c0.5
c2.0
c5
c0.5
c0.5
c0.5
<0.5
<0.5
c0.5
c0.5
<0.5
c0.5
<0.5
<0.5
c0.5
<5
Bottom
12/13/2013
<0.5
<0.5
<0.5
<0.5
<2.0
c5
<0.5
c0.5
c0.5
<0.5
<0.5
c0.5
c0.5
<0.5
c0.5
<0.5
<0.5
c0.5
<5
Surface
12/15/2014
ci
c1
c1
<1
2.38
c5
ci
1.3
<1
<1
0.42 J
It
<1
<1
It
<1
<1
13
<5
Bottom
12/15/2014
It
c1
c1
<1
c2
<5
It
1.3
c1
<1
It
It
c1
<1
It
<1
<1
13
<5
Surface
10/21015
ci
c1
c1
c1
1.43 J
c5
ci
ci
<1
<1
c1
ci
c1
<1
<i
<1
<1
c3
c5
Bottom
10/22/2015
ci
c1
c1
<i
1.60 J
c5
ci
ci
<1
<1
ci
ci
c1
<1
<i
<1
<1
c3
c5
Surface
11/21/2016
It
c1
c1
<1
27
c10
<1
It
c1
c1
It
It
c1
c1
It
<1
<1
<3
<5
Bottom
11/21/2016
<1
c1
c1
<1
28
c10
<1
<1
c1
c1
<1
<1
c1
c1
<1
<1
<1
<3
<5
Bottom
12,28/20,6
NA
NA
NA
NA
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
2/1/2017
NA
NA
NA
NA
c2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Bottom
2/1/2017
NA
NA
NA
NA
c2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
10/13/2017
ci
11
11
11
26.0
c20
ci
ci
c1
c1
ci
ci
c1
c1
ci
c1
<1
<3
<5
Bottom
10/13/2017
<1
c1
c1
<1
20.0
c20
It
It
c1
c1
It
It
c1
c1
<1
c1
<1
<3
<5
Surface
11129/2017
NA
NA
NA
NA
8.9
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Bottom
11,29/2017
NA
NA
NA
NA
9.1
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
11/1/2018
ci
c1
c1
c1
c2
c20
ci
ci
<1
<1
ci
<i
<1
<1
ci
<1
<1
c3
c5
Bottom
11/7/2018
<1
c1
c1
c1
c2
c20
ci
ci
<1
<1
ci
<1
c1
<1
ci
<1
<1
c3
c5
Surface
9/18/2019
ci
c1
c1
c1
c2
c20
<1
<1
<1
<1
ci
11
c1
<1
c1
<1
<1
<3
<5
Bottom
9/18/2019
ci
c1
c1
c1
c2
c20
<1
<1
<1
<1
ci
11
c1
<1
<1
<1
<1
<3
<5

TABLE 6
SURFACE WATER ANALYTICAL RESULTS - VOCs
SEABOARD CHEMICALIRIVERDALE DRIVE LANDFILL SITE
Page 3 of 3
c
c
c
n
�_
s
x
Sample
m
0
Description
Sample Date
o
0
0
'o
0o
o
'o
o
0
'o
0
m
c
g
o
0
o
3.
0
3
z
o
0
o
m
s
x
q
Ir
y
m
>
o
ar
a
1D
a
o
o
u/I
ull
u/l
ull
ull
u/I
u/I
u/I
u/I
ull
u/I
u/I
ua/I
u/I
u/I
Ull
u/l
u/I
u/I
NC 26
Std. WS-IV
2500
6700
330
0.38
0.35
2000
1.19
130
12
NE
330
2.6
0.7
11
140
2.5
0.025
670
20,000
SW-DRP-2
11/3/2000
15
<5
<5
<5
<100
NA
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<10
ND
EAST
9/14/2001
<5
6.3
<5
<5
15.3
<10
<5
5.8
<10
ND
5.7
<5
<5
<5
<5
<5
<10
<5
ND
WEST
9/14/2001
<5
29.5
<5
<5
42.8
<10
<5
61.5
30.5
ND
26.4
<5
<5
<5
<5
<5
21.7
<5
ND
9/24/2002
6.6
47.0
11.8
<5
39.2
<10
<5
62.3
20.5
ND
60.3
<5
<5
<5
<5
<5
28.1
<5
<10
11/26/2002
NA
NA
NA
NA
<10
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/15/2003
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/23/2004
<5
<5
7.1
<5
145
<10
5.4
189
48.6
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
12/20/2005
14.2
80.3
33.8
<5
82.1
<10
<5
66.4
17.7
ND
140
<5
<5
<5
<5
<5
36.1
<5
<10
8/29/2006
<1
2
<1
<1
<2
<5
<1
<1
<1
ND
3.1
<1
<1
<1
<1
<1
<1
<2
ND
Split(8270)
8/29/2006
NA
NA
NA
NA
<3
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/27/2007
<1
<1
<1
<1
23.3
<5
<1
2
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
Upper
2/25/2009
<1.0
<1.0
3.0
1.9
<2.0
8.0
<1.0
1.4
<1.0
ND
7.5
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
Mid
2/25/2009
<11.0
<11.0
<11.0
<1.0
<2.0
9.2
<1.0
<11.0
<11.0
ND
<1.0
<1.0
<1.0
1.4
<1.0
<1.0
<1.0
<2.0
ND
Mid
5/13/2009
.0
.0
.0
1.0
2.0
8.6
.0
.0
.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5
Upper
5/13/2009
<1.0
<1.0
<1.0
<1.0
<2.0
6.9
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5
Surface
4/1/2010
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
<5.0
Bottom
4/1/2010
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
<5.0
Surface
11/21/2012
<0.5
<0.5
<0.5
<0.5
7.27
<5
<0.5
2.75
<0.5
<0.5
1.19
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
Bottom
11/21/2012
<0.5
1.86
1.4
<0.5
11.4
<5
<0.5
6.26
6.36
<0.5
2.26
<0.5
<0.5
<0.5
<0.5
<0.5
2.54
<0.5
<0.5
Surface
12/13/2013
<0.5
<0.5
<0.5
<0.5
<2.0
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<5
Bottom
12/13/2013
<0.5
<0.5
IS
<0.5
<2.0
<5
<0.5
<0.5
<0.5
IS
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<5
Surface
12/15/2014
<1
<1
<1
<1
1.2 J
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
12/15/2014
<1
<1
<1
<1
1.62 J
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
10/2212015
<1
<1
<1
<1
3.02 J
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
10/2212015
<1
<1
<1
<1
3.11 J
<5
<1
0.47 J
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
11/21/2016
<1
<1
<1
<1
18
<10
<1
1.3J
0.59J
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
11/21/2016
<1
<1
<1
<1
18
<10
<1
1.3J
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
12128/2016
NA
NA
NA
NA
7.2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
2/1/2017
NA
NA
NA
NA
<2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Bottom
2/1/2017
NA
NA
NA
NA
<2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
10/13/2017
<1
<1
<1
<1
19.0
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
10/13/2017
<1
<1
<1
<1
21.0
<20
<1
0.53 J
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
11/29/2017
NA
NA
NA
NA
3.4
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Bottom
11/29/2017
NA
NA
NA
NA
3.4
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
11,7120111
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
11/7/2018
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
9/18/2019
<1
<1
<1
<1
1.4 J
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
9/8/2019
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
SW-DRP-4
11/2/2000
<5
<5
<5
<5
<100
NA
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<10
ND
EAST
9/14/2001
<5
9.1
<5
<5
44
<10
<5
101
51.5
ND
8
<5
<5
<5
<5
<5
<10
<5
ND
WEST
9/14/2001
<5
8.5
<5
<5
30.2
<10
<5
69.4
33.3
ND
7.4
<5
<5
<5
<5
<5
<10
<5
ND
9/24/2002
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
11/26/2002
NA
NA
NA
NA
<10
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/15/2003
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/24/2004
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
12/20/2005
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/29/2006
<1
<1
<1
<1
<2
<5
<1
<1
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
9/27/2007
<1
<1
<1
<1
24.9
<5
<1
<1
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
SW-DRP-10
11/2/2000
<5
7.5
<5
<5
<100
NA
<5
14
17
ND
5.7
<5
<5
<5
<5
<5
<10
<10
ND
EAST
9/13/2001
<5
6
<5
<5
43.8
<10
<5
14.4
27.7
ND
<5
<5
<5
<5
<5
<5
<10
<5
ND
WEST
9/13/2001
<5
6.3
<5
<5
43.5
<10
<5
19.2
30.9
ND
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/24/2002
<5
<5
<5
<5
12.6
<10
<5
7.2
7.5
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
11/26/2002
NA
NA
NA
NA
<10
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/15/2003
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/23/2004
<5
<5
<5
<5
12
<10
<5
9.1
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
12120/2005
<5
<5
<5
<5
<10
<10
<5
<10
<10
ND
<5
<5
<5
<5
<5
<5
<10
c5
<10
8/29/2006
<1
<1
<1
<1
4.1
<5
<1
2.9
1.1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
9/27/2007
<1
<1
<1
<1
22.4
<5
<1
<1
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
SW-DRP-11
11/2/2000
<5
<5
<5
<5
<100
NA
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
c10
<10
ND
9/13/2001
<5
<5
<5
<5
10.2
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
ND
9/24/2002
<5
<5
<5
<5
109
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
11/26/2002
NA
NA
NA
NA
<10
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
50 FT UPSTREAM
11/26/2002
NA
NA
NA
NA
<10
NA
NA
NA
NA
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
9/15/2003
<5
<5
<5
<5
53.5
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/23/2004
<5
<5
<5
<5
20.4
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
12120/2005
<5
<5
<5
<5
<10
<10
<5
<5
<10
ND
<5
<5
<5
<5
<5
<5
<10
<5
<10
8/29/2006
<1
<1
<1
<1
3.5
5.2
<1
1.1
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
9/27/2007
<1
<1
<1
<1
17.9
<5
<1
<1
<1
ND
<1
<1
<1
<1
<1
<1
<1
<2
ND
Upper
2/25/2009
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
ND
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
Mid
2/25/2009
<11.0
<11.0
<11.0
<11.0
<2.0
<5.0
<11.0
<11.0
<11.0
ND
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
ND
Mid
5/13/2009
.0
.0
0
0
20
104
0
0
0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5
Upper
5/13/2009
<1.0
<1.0
<1.0
<1.0
<2.0
<5
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<5
Surface
4/1/2010
<1.0
<1.0
<1.0
<1.0
<2.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
<5.0
Bottom
4/1/2010
<1.0
<1.0
<1.0
<1.0
<2.0
<10
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
ND
<5.0
Surface
11/21/2012
<0.5
<0.5
<0.5
<0.5
10.2
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
Bottom
11/21/2012
<0.5
<0.5
<0.5
<0.5
9.93
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
Surface
12/16/2013
<0.5
<0.5
<0.5
<0.5
<0.5
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
Bottom
12/16/2013
<0.5
<0.5
<0.5
<0.5
14.4
<5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
Surface
12/11014
<1
<1
<1
<1
1.55 J
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
12/15/2014
<1
<1
<1
<1
1.53 J
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
10/22/2015
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
10/22/2015
<1
<1
<1
<1
<2
<5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
11/21/2016
<1
<1
<1
<1
19
<10
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
11/21/2016
<1
<1
<1
<1
17
<10
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
2/1/2017
NA
NA
NA
NA
<2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Bottom
2/1120,7
NA
NA
NA
NA
1.4J
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
10/13/2017
<1
<1
<1
<1
31.0
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
10/13/2017
<1
<1
<1
<1
31.0
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
11/29/2017
NA
NA
NA
NA
20.0
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Bottom
11/29/2017
NA
NA
NA
NA
20.0
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Surface
11/7/2018
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
11/7/2018
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Surface
9/18/2019
<1
<1
<1
<1
1.3 J
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
Bottom
9/18/2019
<1
<1
<1
<1
<2
<20
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<3
<5
ugn = mwrograms per urer =
J= Estimated mine NE = Not Established
B = Analyte detected in method blank as well as sample NA = Not Analyzed
Bold type indiestes aalue exceeds NC 2B surface water quality standard (WS-IV) NC 2B Std. (INS -IV) = North Carolina 2B surface water quality standard far Class WS-IV waters
Values separated by slash 0 indicates split sample results

�j
rl
Remedial Monitoring and Effectiveness
Evaluation Plan
Seaboard Chemical Corporation & Riverdale Drive Landfill Site
Prepared for the Seaboard Group II and City of High Point

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
Table of Contents
1 INTRODUCTION........................................................................................................................1
1.1 BACKGROUND...............................................................................................................................1
1.2 OBJECTIVES....................................................................................................................................3
2 MONITORING OBJECTIVES......................................................................................................3
3 REMEDIAL MONITORING PLAN...............................................................................................3
3.1 GROUNDWATER MONITORING................................................................................................... 4
3.2 SURFACE WATER MONITORING.................................................................................................... 4
3.3 QUALITY CONTROL SAMPLES........................................................................................................4
3.4 MONITORING SCHEDULE.............................................................................................................. 5
4 EVALUATION OF EFFECTIVENESS OF REMEDIAL ACTION.........................................................5
4.1 MEASUREMENT OF EXTRACTION RATES OF RECOVERY WELLS .................................................... 6
4.2 EVALUATION OF GROUND WATER DRAWDOWN, CAPTURE ZONES AND FLOW PATTERNS ........ 6
4.3 EVALUATION OF RATES OF CONTAMINANT MASS RECOVERY...................................................... 6
4.4 OVERALL PERFORMANCE EVALUATION OF EXTRACTION WELL NETWORK ............................... 7
4.5 DEVELOPMENTOF OPTIMUM SYSTEM OPERATING PARAMETERS .............................................. 7
4.6 ISSUES AND FOLLOW-UP ACTIONS............................................................................................... 8
4.7 COMPREHENSIVE FIVE-YEAR REVIEW........................................................................................... 8
5 REPORTING..............................................................................................................................9
Figures
Figure1 - Site Location.................................................................................................................11
Figure 2 - General Area Layout.....................................................................................................12
Figure 3 - Recovery Well Locations...............................................................................................13
Figure 4 - Proposed Monitoring Well Locations...........................................................................14

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
1 INTRODUCTION
This Remedial Monitoring and Effectiveness Evaluation Plan (Plan) has been developed to
monitor and assess the effectiveness of the approved groundwater and surface water
remediation being conducted at the Seaboard Chemical Corporation and closed Riverdale
Drive Landfill Site (Site) in Jamestown, Guilford County, North Carolina. This Plan supplements
the Remedial Recommendation Document (Southwestern Environmental, 2005), the Remedial
Action Preconstruction Report (ERM-NC, December 2009), and the revision and amendments
thereto, that presents the remedial design installed to address impacted soils, groundwater,
and surface water, and landfill leachate at the Site.
This Plan has been prepared by Seaboard Group II and the City of High Point (Parties) to
replace the plan dated in October 2009, which is included as Attachment E in the Remedial
Action Preconstruction Report, in order to reflect additional hydrogeologic and other
information obtained since the 2009 plan was developed. The Preconstruction Report was
submitted to the North Carolina Department of Environment and Natural Resources
(NCDENR) in December 2009, and approved in April 2010.
1.1 BACKGROUND
The general Site location is shown in Figure 1. The Site consists of two properties as shown on
Figure 2. The former Seaboard Chemical Corporation facility is located at 5899 Riverdale Drive,
Jamestown, NC and consists of approximately 13 acres. The adjacent Riverdale Drive Landfill, a
closed municipal solid waste landfill, consists of approximately 150 acres and bounds the
Seaboard facility on two sides.
Between 1974 and 1989, Seaboard Chemical Corporation operated solvent recovery and fuel
blending processes at the facility. The facility was granted Interim Status under the Resource
Conservation and Recovery Act (RCRA) as a treatment, storage, and disposal facility in 1982.
The facility was divided into 13 operating areas that included, among other things, distillation,
fractionation, and condensation of organic solvent wastes. In addition, three surface
impoundments were in service at the facility during the time that Seaboard was in operation.
The corporation declared bankruptcy and was not able to fund the cost of performing the
necessary Site closure and remediation.
Removal activities were conducted during 1990 and 1992 to remove all remaining waste
materials and certain tanks and equipment from the Seaboard facility. The removal was
conducted by the Seaboard Group I, formed by parties that may have used the services of
Seaboard Chemical Corporation in the past (also referred to as potentially responsible parties
or PRPs). The property is owned at this time by the bankruptcy estate of Seaboard Chemical
Corporation.
The Landfill was operated, using customary methods in general use at the time, from the
1950's until October 1993. The Landfill was permitted by the NCDENR Solid Waste Section in
1979. During Landfill operations, sections of the two tributary streams that dissect the landfill
property were piped, and solid waste was used to fill the drainage valleys. From approximately
Page 1 of 14

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
1966 to 1970, Landfill operations included the disposal and open burning of spent solvents.
Solvents were placed in open unlined pits referred to as burn pits. Periodically the burn pits were
cleaned of residue that was accumulated in a mound. Presently this mound consists of
approximately 600 cubic yards of contaminated residue and is referred to as the soil residue
mound. In 1989, a leachate collection system was added to control surface seeps (leachate
leakage) along the side -slopes of the landfill. The leachate from these seeps is presently
collected in concrete storage tanks and subsequently pumped into tank trucks and treated off -
site. The Landfill is now capped with a minimum of two feet of native soil and limited
vegetative cover.
Seaboard Group II (Group) was formed to perform a remedial investigation and to prepare a
remedial investigation report, baseline risk assessment, and feasibility study for the Seaboard
site. The Group entered into an agreement with the City of High Point to perform a joint
remedial investigation since the close proximity of the landfill and Seaboard Chemical
Corporation facility made joint investigation of the two sites advantageous for both the City
and the Group. The Parties then entered into an Administrative Order on Consent (AOC)
dated January 30, 1996 with NCDENR to perform the remedial investigation. The feasibility
study was conducted under a separate AOC dated July 22, 1997.
Remedial investigations conducted at the Site have documented the presence of chlorinated
and non -chlorinated hydrocarbon compounds in soils, landfill leachate, groundwater, and
surface water. The remedial investigation results indicate the presence of dense non -aqueous -
phase liquid organics (DNAPL) in the fractured bedrock aquifer underlying the Site. The general
area of impacted groundwater at the Site is shown on Figure 2.
The Remedy Recommendation Document dated February 2005 presents a protective remedial
strategy for the impacted media based on the results of the remedial investigation, baseline
risk assessment, and feasibility study. The proposed remedial design consists of groundwater
extraction and treatment in combination with institutional controls including Site access
control, recorded land use restrictions, and restriction of water supply well construction. The
proposed remedy will prevent movement of contaminants into the Randleman Reservoir
(Reservoir) and the Southern Intermittent Stream (SIS) and prevent exposure to impacted soils
and groundwater at the Site. A network of seven groundwater recovery wells will be utilized
for extraction of affected groundwater. In addition, seven leachate collection tanks will
contain leachate leakage at the perimeter of the landfill. The locations of the recovery wells
and leachate collection tanks are shown in Figure 4. Groundwater and surface water sampling
will monitor the effectiveness of the remedy to ensure that there is no unacceptable migration
of contaminants to the Reservoir.
It has been determined that the most effective long-term method to accomplish the
treatment of the extracted groundwater is through natural treatment processes such as
biodegradation and phytoremediation. This method will involve the use of an upland
phytoremediation system comprised conifer and hardwood trees intended to provide year -
around treatment effectiveness for the extracted groundwater. In addition, biodegradation of
contaminants in the landfill soils will augment the treatment provided by the upland
phytoremediation process.
Page 2 of 14

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
1.2 OBJECTIVES
To the extent practical, the objectives of remedial action at the Site include the following:
1. Contain the contaminated soils at the source areas to prevent direct contact by
potential human and environmental receptors, reduce percolation and intrusion of
storm water and reduce migration of contaminants of concern (CoCs) into the
groundwater; and,
2. Control migration of landfill leachate to prevent discharge to surface waters at the Site;
and,
3. Control migration of contaminated groundwater and leachate at the Site to prevent
offsite migration and unacceptable impacts to surface waters; and,
4. Achieve compliance with North Carolina surface water quality standards for the CoCs in
the surface waters of the onsite streams and the Deep River; and,
5. Achieve compliance with North Carolina groundwater quality standards for the CoCs in
the groundwater beneath the Site; and,
6. Restrict future Site uses that could present potentially unacceptable exposure risks
(e.g., residential development, use of impacted groundwater, etc.).
2 MONITORING OBJECTIVES
The primary objectives of the groundwater and surface water -monitoring program are:
• Determine the general extent of the groundwater capture zones created by
pumping each extraction well;
• Monitor volatile organic compound (VOC) concentrations and hydraulic
containment of the VOC-affected groundwater at the Site;
• Monitor groundwater elevations, hydraulic gradients and flow directions;
• Measure the relative hydraulic gradient between groundwater and surface water
at the Site;
• Monitor surface water quality in the Reservoir and Southern Intermittent Stream
to assess potential impacts from VOC-affected groundwater discharge;
• Monitor and verify the general effectiveness of the groundwater and surface
water remediation program.
3 REMEDIAL MONITORING PLAN
A groundwater and surface water -monitoring program has been developed to be conducted
during the remedial action at the Site. The groundwater and surface water -monitoring
program will be conducted commencing after the startup of the full remediation system. The
proposed sampling and gauging locations are shown on Figure 4. The remedial monitoring
plan is described below.
Page 3 of 14

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
3.1 GROUND WATER MONITORING
Groundwater level gauging is proposed at 24 monitor wells (Figure 4) to monitor groundwater
flow patterns at the Site and capture zones near the recovery wells during the remedial action.
The water level measurements will be made manually using electronic water level meters on a
quarterly basis for the initial two years and then annually thereafter.
In addition, seven monitor wells (PW-6D, OW-DR2, OW-DR3, OW-DR4, OW-LFS2, PW-15D, and
PW-16D), as well as the primary extraction well (PWDR-1), will be equipped with automated
water level pressure transducers to record groundwater level data on a daily basis year -
around. The daily water level data will be collected at critical locations near recovery wells to
monitor and document the capture zones of the groundwater extraction system.
Groundwater sampling is proposed at 24 monitoring wells (Figure 4) to track the VOC plume
concentrations and containment. The groundwater samples will be analyzed for VOCs by EPA
Method 8260 with 1,4-dioxane. Field parameters (pH, conductivity, dissolved oxygen, and
temperature) will also be measured for each groundwater sample using calibrated meters.
The sampling procedures will be in general accordance with the specifications provided in the
project Sampling and Analysis Plan (ERM-NC, November 1995).
3.2 SURFACE WATER MONITORING
Surface water sampling is proposed on an annual basis at a total of six surface water stations
(Figure 4). This will include two stations in the Reservoir, one upstream at the Kivett Drive
Bridge, one in the Southern Intermittent Stream west of the former Seaboard site, one
downstream on the Southern Intermittent Stream at the boundary with the Riverdale Drive
Landfill, and one station on the Southern Intermittent Stream before it enters the Reservoir.
The surface water samples will be analyzed for VOCs, by EPA Method 8260 with 1,4-dioxane.
Field parameters (pH, conductivity, dissolved oxygen, and temperature) will also be measured
for each surface water sample using calibrated meters. The sampling procedures will be in
general accordance with the specifications provided in the project Sampling and Analysis Plan
(ERM-NC November 1995).
For the Randleman Reservoir sampling locations, two samples will be collected at each station:
• One sample at the surface of the water and
• One sample at approximately 1 foot above the bottom of the reservoir.
The deep reservoir sample will be collected using a subsurface grab sampling device
(Kemmerer -style sampler or equivalent). The reservoir sampling locations are intended to be
near the historical surface water sampling locations on the Deep River that were sampled
during the remedial investigation at the Site and prior to the filling of the Randleman
Reservoir. At the Northern Intermittent Stream (NIS) and SIS sample locations, a single grab
sample will be collected at each location.
3.3 QUALITY CONTROL SAMPLES
Quality control samples will consist of a trip blank for analysis of volatile organic compounds
Page 4 of 14

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
by EPA Method 8260 with 1,4-dixoane. The sampling procedures will be in general
accordance with the specifications provided in the project Sampling and Analysis Plan.
3.4 MONITORING SCHEDULE
The groundwater and surface water -monitoring program will be conducted on an annual basis,
or as the frequency may be revised, should a revised post-remediation plan be implemented.
4 EVALUATION OF EFFECTIVENESS OF REMEDIAL ACTION
The selected remedy includes using a network of groundwater extraction or recovery wells to
intercept the main contaminant mass in groundwater at the Site in order to protect surface
water quality in the Reservoir and the Southern Intermittent Stream. Currently, the remedial
design of the recovery well system consists of seven shallow wells (40-50 feet deep) and one
deep well (185 feet deep) to contain the affected groundwater. The design flow rate for the
groundwater remediation system is 50-gallons per minute. The estimated duration of the
remedial action is greater than 30-years.
The proposed remediation system is designed primarily to provide effective containment of
the main contaminant mass in groundwater at the Site. The remedial approach will contain
the migration of the VOC- affected groundwater to the surface water at the Site.
In order to confirm the effectiveness of the remediation system,
1) The remediation system will be monitored during a 2-year field performance test period
upon startup of the system, and
2) The results of the groundwater and surface water -monitoring program described in Section
3.0 will be evaluated.
The objectives of the system effectiveness evaluation are:
• To determine the actual sustained flow (extraction) rates of each extraction well
and the combined flow rate of the extraction system under prolonged pumping
conditions, and
• Determine the effect on groundwater flow patterns and evaluate actual
groundwater drawdown and capture zones generated by the extraction well
network, and
• Evaluate the containment of the groundwater plume, and
• Evaluate the estimated the amount of contaminant mass extraction and the overall
treatment system destruction and removal efficiency (DRE), and
• Evaluate the effectiveness of the remediation system for surface water remediation
at the Site, and
• Determine the optimum operating parameters of the remediation system.
The major elements of the effectiveness evaluation of the remediation system are summarized
in sections 4.1 through 4.4. However, this remedy is designed to provide containment of the
contaminant plume and is not designed to achieve a specific amount of contaminant mass
Page 5 of 14

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
removal. Rather it is designed to contain the plume while extracting as much of the
contaminant mass as possible and removing as much of the mass before the effluent is used
for irrigation. Additionally, the information from the monitoring program and effectiveness
evaluation will be used to support a comprehensive five-year review of the overall
protectiveness of the remedial action. The five-year review process is described in section 5.7.
4.1 MEASUREMENT OF EXTRACTION RATES OF RECOVERY WELLS
Groundwater flow (extraction) rates will be monitored by installed flow meters for each
extraction well as part of the remedial monitoring program. The flow rate data will also be
collected at regular intervals as part of the routine system operation activities (individual flows
averaged over a 24 hour period as well as a record of the duration and flow rate of each
extraction pump that operates). Each extraction well is equipped with a gate valve and
totalizing flow meter in the discharge pipe to regulate and monitor flow rates and volumes.
4.2 EVALUATION OF GROUND WATER DRAWDOWN, CAPTURE ZONES AND
FLOW PATTERNS
Throughout the 2-year performance test, and as part of the remedial monitoring program,
water level data will be collected at regular time intervals by the system control and data
acquisition (SCADA) for wells equipped with transducers and manually for other wells in the
monitoring network. Water levels will be measured to the nearest 0.01 feet using transducers
or electric water level indicators. During pumping, the water level data will be collected by the
SCADA to measure drawdown in the recovery wells, and adjacent observation wells, during
prolonged pumping conditions, and determine the effect of seasonal and climatological
changes and variations in the pool elevation of the reservoir have on the groundwater and
surface water flow as well as the overall capture zone at the Site. In analyzing the water level
data the main goal will be to determine the extent of the capture zone for the extraction well
system. To determine the properties of the capture zone, maps of maximum drawdown
contours will be constructed in conjunction with the monitoring reports to reflect the effects
of the capture zone.
Groundwater flow patterns during pumping will be determined by mapping monitored water
level elevation data (as opposed to drawdown). The estimated capture zone boundaries and
flow patterns will be compared to the previously determined plume boundaries to evaluate
containment of the plume.
Immediately before the start of testing and the operation of the groundwater extraction
system, pre -pumping water level data will be collected from the recovery wells, adjacent
observation wells, and other wells in the monitoring network. The pre -pumping water -level
data will be used to establish the static water levels that exist before the test.
4.3 EVALUATION OF RATES OF CONTAMINANT MASS RECOVERY
Even though groundwater extraction technology for contaminant removal and groundwater
remediation has certain acknowledged limitations, contaminant mass removal rates will be
calculated from the flow rate data and contaminant concentration data obtained by laboratory
Page 6 of 14

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
analyses of the extracted groundwater, leachate and the process effluent water during system
operation. Sampling and analysis of extracted groundwater and leachate for VOCs will be
conducted at the LS-1 groundwater and leachate inlet pipe prior to the aeration tank during
each annual sampling event during the 2-year performance test and as part of the remedial
monitoring program. In addition, a sample of PWDR-1 and all other groundwater wells that
pump directly into LS-2 and are not processed through LS-1 will be collected at their inlets into
the wet -wall manifold in LS-2 before being pumped into the Filter Building aeration tank.
These samples will be analyzed for VOCs by EPA Method 8260 with 1,4-dioxane. The data will
be evaluated to calculate the amount of contaminant mass extracted by each recovery well. In
addition, a sample of the remedial system effluent from the T-400 tanks in LS-2 will be
collected to assess the DRE of the overall system.
4.4 OVERALL PERFORMANCE EVALUATION OF EXTRACTION WELL
NETWORK
The effectiveness of the extraction well system will be evaluated based on the reduction of
VOC contaminant concentrations in the surface waters of the reservoir and Southern
Intermittent Stream, as well as the reduction of contaminant concentrations in groundwater at
the monitoring wells located down -gradient of the recovery well network. In addition, the
primary measure of the effectiveness of the system will be evaluated by containment of the
groundwater plume and the calculated contaminant mass DRE of the mechanical treatment
system.
During the 2-year test period, the Parties will conduct a pilot study on an instrumented
phytoremediation pilot plot in existence at the Site. The goal of the pilot study will be to
document and measure the effect that other natural treatment mechanisms, other than
phytovolatilization, have on the contaminants of concern (CoC). This study will serve to better
determine the extent of reduction of CoCs that can be expected from the natural treatment
systems year -around. It is recognized that phytovolatilization is not as effective during seasons
when tree uptake of water is minimal (respiration). However, in earlier pilot studies it was
demonstrated by accurate mass balance using tracer additives that a significant of the
eliminated 1,4-dioxane was not accounted for in tree uptake. One theory is that methane -
metabolites active in the landfill soils cause accelerated biodegradation of the CoC, even at
times of low tree uptake. At the conclusion of the 2-year test, the pilot study data should
allow the determination of an overall DRE based on year -around efficiencies of both the
physical and natural treatment systems.
4.5 DEVELOPMENT OF OPTIMUM SYSTEM OPERATING PARAMETERS
While operating the remediation system during the 2-year field performance test, adjustments
to the system components will be made to optimize the system performance. The following
operating parameters will be monitored, adjusted and recorded:
• Pumping rates of extraction wells.
• Collection of system operational data such as pressure, flow volumes, hours of
operation, etc.
• Inspection of operational equipment and critical devices.
Page 7 of 14

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
• Servicing of equipment as specified by the manufacturer.
• Repair and troubleshooting of the system as needed
Operational logs will be maintained to record critical data. The operational data obtained
during the field performance test will be entered into a database and will serve as the baseline
conditions for the system operation and performance. Adjustments for system optimization
will be performed on an as needed basis as part of the routine operation and maintenance
activities for the system.
4.6 ISSUES AND FOLLOW-UP ACTIONS
If a technical assessment of the monitoring data identifies conditions at the Site that
significantly impact the effectiveness of the remediation system, then a plan of appropriate
follow-up actions will be developed. Potential types of follow-up actions may include the
following:
• Additional monitoring activities to confirm or supplement the routine monitoring
data.
• Modifications to operation and maintenance activities of the remediation system to
address the issue.
• Supplemental remedial assessment and/or risk assessment activities to further
characterize the issue.
• Additional remedial measures (i.e. additional recovery wells or institutional
controls) to address the issue. The plan of specific follow-up actions will be
submitted to the NCDENR for review. The plan will include a schedule of
implementation and reporting and the criteria that will be used to evaluate the
effectiveness of the proposed action for achieving the remedial objectives.
4.7 COMPREHENSIVE FIVE-YEAR REVIEW
A comprehensive review of the remedy will be performed every five -years after NCDENR
issues a letter to the parties authorizing operation of the remedy as built. The purpose of the
five-year review is to evaluate the effectiveness of the remedy and to assess whether the
remedy remains protective of human health and the environment. The scope of work of the
five-year review will be in substantial compliance with the United States Environmental
Protection Agency's (EPA's) Comprehensive Five -Year Review Guidance (OSWER Directive No.
9355.7-03B-P).
The five-year review will address the following three questions:
• Is the remedy functioning as intended in the design documents?
• Are the exposure assumptions, toxicity data, cleanup levels, and remedial action
objectives used at the time of the remedy selection still valid?
• What is the effective DRE, mass removal rate and capture efficiency of the physical and
natural treatment systems?
• Has any other information come to light that could call into question the
protectiveness of the remedy?
Page 8 of 14

REMEDIAL MONITORING AND EFFECTIVENESS EVALUATION PLAN
In general, the scope of the five-year review will include the review of Site related documents
(e.g. Ground Water Monitoring Reports) that have been submitted to the NCDENR since the
last five-year review, a review of the Applicable or Relevant and Appropriate Regulations
(ARARs) and a comparison to new standards, if any, and a Site technology review to address
the operation of the remediation system and the performance of the Site remedy. The five-
year review reports will be provided to NCDENR within one hundred and eighty (180) days of
the end of each five-year reporting period; with the first five-year reporting period,
commencing on the date the NCDENR issues a letter authorizing the system to be placed into
operation.
5 REPORTING
The results of the groundwater and surface water monitoring activities will be presented in a
report including data tables, laboratory reports, groundwater elevation contour maps and
separate iso-concentration contour maps for total volatile organic compounds.The summary
report will include a section presenting an evaluation of the effectiveness of the remedial
action. The summary report will be submitted to the North Carolina Division of Waste
Management no later than 90-days after all data is received, or 120-days after the samples are
collected whichever is earlier.
Page 9 of 14

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WEEKLY LOG WEEK: I I TO
SEABOARD GROUP II & THE CITY OF HIGH POINT
METER READINGS:
LS1 LEACHATE
LS1 RWs
PWDR1
SIS RWs
PHYTO DISCH.
POTW DISCH.
LS1 COMPR. (d1)
LS1 COMPR. (d4)
LS2 COMPR. (d1)
LS2 COMPR. (d4)
ELECT. METER
AIR STRIPPER
WATER METER
ID
FIT-122
FIT-123
FIT-212
FIT-213
FIT-400C
FIT-400D
AC-120
AC-120
AC-200
AC-200
HP-EM
B-605
HP-WM
READING
UNITS
GAL
GAL
GAL
GAL
GAL
GAL
RUN HRS
LOAD HRS
RUN HRS
LOAD HRS
KWH
RUN HRS
CF
EFFLUENT
LAB SAMPLE
Fe
TSS
pH
ORP
COND
TDS
DO
COD
DATE
BY
ZONE FLOW
WELL
LEVELS
OWDR-4
O W D R-2
PWDR-1
O W D R-3
PW-6D
OWLFS-2
PW-16D
PW-15D
DATE
y
BACKWASH FIT-603 GAL
(WEEKLY READING) DATE:
BY:
CHEMICAL LEVELS (GALLONS):
SULFURIC ACID T-303 WARE.
SODIUM HYD. T-304 (GAL.)
WATER-WORX T-614
FLOCCULANT T-615
LIME SLURRY T-711
FERRIC CHLORIDE T-712
CITRIC ACID (LBS.) WARE.
DATE:
BY:
SOURCE WATER: PWDR-1 SIS RWs LS1 RWs
(CIRCLE APPLICABLE SOURCES)
COMMENTS: (DATE, TIME ARRIVED, TIME DEPARTED, PERSONNEL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
COMPLETE,
PUMP
COUNTERS
LCHT-1
LCHT-2
LCHT-3
LCHT-4
LCHT-5
LCHT-NIS1
LCHT-NIS2
RW-NIS
RW-LFS1
RW-LSF2
RW-SIS1
RW-SIS2
RW-SIS3
RW-SIS4
DATE
BY
LS1 LCHT
ON SITE, TASKS
ISSUES)

SEABOARD GROUP II AND THE CITY OF HIGH POINT
November 17, 2017
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Quarterly Remedial Action Progress Report, 3rd Quarter 2017
Seaboard Chemical Corp. and City of High Point Riverdale Drive Landfill Site
Jamestown, North Carolina
Dear Mr. Ghiold:
Seaboard Group II and the City of High Point, NC (Parties) provide this 3rd Quarter 2017
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility (SCC)
and closed Riverdale Drive Landfill (Landfill) located in Jamestown, NC (the Site).
During the second quarter of 2017, the Parties finalized and submitted the Construction
Completion Report (CCR) to NCDEQ electronically on May 15, 2017. This submittal satisfied
Section J of the Remedial Action Settlement Agreement - Statement of Work. The CCR
identified the Remedial Objectives and provided a detailed description of the construction and
operational components of the Remedial Treatment System. The CCR document was approved
in writing by NCDEQ on July 25, 2017 which also established a 30-day period for full startup and
operation of the Remedial Treatment System. By correspondence dated August 25, 2017, the
Parties notified NCDEQ that the Remedial Treatment System was fully operational.
Activities Conducted During the 3rd Quarter of 2017
On June 19, 2017, the treatment system experienced a shutdown due to a lightning strike
which resulted in extensive damage to the communications system. The damage to the
electrical systems required significant diagnostic and troubleshooting efforts to identify and
isolate the damaged components of the Profibus network and peripheral equipment. The
system damage has been repaired and the system returned to full operation on August 7, 2017
resulting in a shutdown period of 55 days.
Since resuming operation of the system, the Parties have evaluated response actions to protect
the system electronics from future lightning strikes and other power fluctuations. The entire
system has been inspected by an electrical contractor and the Parties have received

recommendations for upgrades to the building grounding protection and UPS backup systems.
The Parties are currently evaluating these recommendations.
The attached Figures and Tables provide the results of the full scale testing of the treatment
System during the third quarter of 2017, including: Operating Data, Process Flow Data, Well
Static Water Level Data, System Chemistry, Utility Data Use, and Contaminant Removal
Efficiency.
Summary
At this time, the system testing is complete and as of August 25, 2017 is in full operation.
Repairs to the treatment system resulting from the lightning strike have been made and
recommendations to reduce future damage to the electrical system are under review.
Please contact Mr. Gary D. Babb, P.G. (919-325-0696) or Randy C. Smith (603-673-0004) if there
are any questions or comments. Please direct correspondence related to this matter to:
Gary D. Babb, P.G.
Seaboard Group II and City of High Point
c/o Babb & Associates, P.A.
P.O. Box 37697
Raleigh, NC 27627
Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
Gary D. Babb, P.G.
cc Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Randy Smith - Financial Trustee
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q3 2017
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
QUARTERLY
Units of
0
1
2
3
4
5
6
7
8
9
10
11
12
13
TOTALS
Measure
METER READING
n
0
m
^
0
n
n
0
n
0
0
ry
^
0
\
n
0
n
0
0
\
0
^
0
co
n
0
n
0
n
0
LEACHATE (GALLONS)
1,662,630
1,662,630
1,662,630
1,662,630
1,662,630
1,662,630
1,662,630
1,748,375
1,829,211
1,916,917
1,961,014
1,989,796
2,028,271
2,039,357
1 1 376,727
GALLONS
LS1-RWs (GALLONS)
552,913
552,913
552,913
552,913
552,913
552,913
552,913
569,996
570,133
573,428
582,667
584,237
592,586
594,984
42,071
GALLONS
PWDR1 (GALLONS)
2,594,916
2,594,916
2,594,916
2,594,916
2,594,916
2,594,916
2,594,916
2,749,440
2,942,935
3,144,168
3,211,759
3,277,960
3,339,365
3,364,776
769,860
GALLONS
SIS-RWs (GALLONS)
280,291
280,291
280,291
280,291
280,291
280,291
280,291
292,297
309,615
324,034
329,593
332,341
342,173
345,281
64,990
GALLONS
PHYTO DISCH. (GALLONS)
5,200,822
5,200,822
5,200,822
5,200,822
5,200,822
5,200,822
5,200,822
5,486,315
5,802,923
6,125,541
6,263,035
6,375,402
6,501,889
6,540,619
1,339,797
GALLONS
AIR STRIP. RUNTIME (HRS)
3,162
3,162
3,162
3,162
3,162
3,162
3,162
3,302
3,463
3,626
3,701
3,764
3,838
3,862
700
32.0%
LS1 COMP RUN (HOURS)
5,047
5,047
5,0471
5,047
5,047
5,047
5,047
5,140
5,250
5,354
5,404
5,445
5,506
5,522
475
HOURS
LS1 COMP LOAD (HOURS)
356
356
356
356
356
356
356
369
380
390
396
400
416
418
62
HOURS
LS2 COMP RUN (HOURS)
6,075
6,075
6,075
6,075
6,075
6,075
6,075
6,159
6,277
6,407
6,461
6,479
6,543
6,567
492
HOURS
LS2 COMP LOAD (HOURS)
792
792
792
792
792
792
792
798
814
823
829
830
838
841
49
HOURS
ELECT. UPPER (kW-Hr)
6,984
6,984
6,984
6,984
6,984
6,984
6,984
7,057
7,093
7,129
7,158
7,183
7,208
7,227
243
KW-HR
CALCULATED
QUARTERLY
DAILY AVERAGE
AVERAGES
LEACHATE (GALLONS)
-
-
12,249
11,548
12,529
6,300
4,112
5,496
1,584
4,140
GALLONS
LS1-RWs (GALLONS)
-
2,440
20
471
1,320
224
1,193
343
462
GALLONS
PWDR1 (GALLONS)
-
22,075
27,642
28,748
9,656
9,457
8,772
3,630
8,460
GALLONS
SIS-RWs (GALLONS)
-
1,715
2,474
2,060
794
393
1,405
444
714
GALLONS
PHYTO DISCH. (GALLONS)
-
40,785
45,230
46,088
19,642
16,052
18,070
5,533
14,723
IGALLONS
WEEKLY RUNTIME (DAYS)
-
5.8
6.7
6.8
3.1
2.6
3.1
1.0
2.2
DAYS/WK
LS1 COMP RUN (HOURS)
-
13.3
15.7
14.9
7.1
5.9
8.7
2.3
5.2
HOURS
LS1 COMP LOAD (HOURS)
-
1.9
1.6
1.4
0.9
0.6
2.3
0.3
0.7
HOURS
LS2 COMP RUN (HOURS)
-
12.0
16.9
18.6
7.7
2.6
9.1
3.4
5.4
HOURS
LS2 COMP LOAD (HOURS)
-
-
0.9
2.3
1.3
0.9
0.1
1.1
0.4
0.5
HOURS
ELECTRICITY (kW-Hr)
-
-
-
-
10.4
5.1
5.1
4.1
3.6
3.6
2.7
2.7
KW-HR
AVERAGE FLOW
0.0
0.0
0.01
0.0
0.0
0.0
28.3
31.4
32.0
13.6
11.1
12.5
3.8
10.2
GAL/MIN
EFFLUENT LABS*
* Effluent lab results reflect pretreated water quality from the mechanical treatment system which is subsequently discharged to the phytoremediation system
Fe (mg/L)
-
0.2
(0.1)
0.1
0.06
5
5.88
1.6
mg/L
pH (m/L)
6.38
6.5
6.85
7.04
6.47
6.09
6.73
6.6
m/L
ORP(mV)
68
65
126
124
56
811
131
1 93
mV
CON D(uS/cm)
1,897
1,778.0
1,719
1,898
1,686
1,899
2,215
1,870
uS/cm
TDS (mg/L)
1,354
1,268.0
1,223
1,368
1,203
1,363
1,611
1,341
mg/L
TSS (mg/L)
8
26.0
20
16
8
51
66
27.9
mg/L
COD (mg/L)
88
90.5
79
69
62
119
164
96
mg/L
WELL LEVELS (WL)
Average
Change
OWDR-4
682.16
671.21
668.64
670.23
673.68
681.45
669.32
672.4
(9.74)
OWDR-2
681.90
670.29
667.89
669.55
673.19
681.40
668.651
1 671.8
(10.07)
PWDR-1
689.23
672.72
668.24
668.70
668.78
689.24
671.07
673.1
(16.10)
OWDR-3
681.24
680.74
680.52
680.60
680.34
680.25
680.5
(0.75)
PW-6D
680.37
673.19
670.55
670.52
670.36
671.2
(9.22)
OWLFS-2
680.001
662.87
670.071
673.41
669.921
679.25
662.90
669.7
(10.26)
PW-16D
680.13
675.16
673.35
674.01
675.79
679.49
673.71
675.3
(4.88)
PW-15D
682.74
678.91
677.45
677.92
679.16
682.02
677.70
678.9
(3.88)
ESTIMATED LAKE LEVEL
682.2
682.2
682.2
682.2
682.2
682.2
682.001
1 682.2
(0.03)
SOURCE WATER
PWDR-1
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
YES
LEACHATE (LCHT)
INOI
NOI
NO
NOI
NOI
NO
YESI
YESI
YESI
YESI
YESI
NO
YES
LS-1 RECOVERY WELLS (LS1-RWs)
NOI
NOI
NO
NOI
NOI
NO
YESI
YESI
YESI
YESI
YESI
NO
YES
SIS RECOVERY WELLS (SIS-RWs)
NOI
NOI
NO
NOI
NOI
NO
YESI
YESI
YESI
YESI
YESI
NO
YES
Figure 1 - Operating Data

50000
45000
40000
35000
N
Z
O
J
a 30000
3
O
LL 25000
J
a
0
l7 20000
LU
W
a
15000
10000
5000
0
SEABOARD Q3 2017
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
Figure 2 - Process Flow Data
8
7
6
5
T
—+--LEACHATE (GALLONS)
fLS1-RWs (GALLONS)
4 v
E
4+
fPWDR1 (GALLONS)
--X—SIS-RWs (GALLONS)
3
--)I-PHYTO DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
2
1
0

695.00
C:iI��iU7
685.00
,, 680.00
3: 675.00
670.00
665.00
SEABOARD Q3 2017
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
Figure 3 - Well Static Water Level Data
-4--OWDR-4
fOWDR-2
PWDR-1
-44-OWDR-3
--I- P W-6 D
fOWLFS-2
tPW-16D
PW-15D
ESTIMATED LAKE LEVEL

70
.0
50
40
Nf
H
2
a
ai
LL
30
10
0
1 2 3 4 5 6
Figure 4 - System Chemistry
SEABOARD Q3 2017
7
WEEK
8 9 10 11 12 13
2500
2000
1500 p
--+--Fe (mg/L)
o
—*--pH (m/L)
H
o
TSS (mg/L)
z
--X—ORP (mV)
1000 °C
--I--COND (uS/cm)
O
+-)--TDS (mg/L)
COD (mg/L)
500
0

20.0
18.0
16.0
14.0
tA
W
a
W 12.0
a
p 10.0
O
CA
Ln
W
a 8.0
O
v
4.0
2.0
SEABOARD Q3 2017
1 2 3 4 5 6 7
WEEK
Figure 5 - Utility Use Data
8 9 10 11 12 13
35.0
30.0
25.0
W
a
LU
W
a
}
J
20.0
0
tLS1 COMP RUN (HOURS)
z
O
tLS1 COMP LOAD
i=
(HOURS)
15.0
N
fLS2 COMP RUN (HOURS)
z
-0-LS2 COMP LOAD
W
(HOURS)
-I-ELECTRICITY (kW-Hr)
0
10.0
a
5.0

Contaminant
Masses
STEP
1,4_
Chlorinated
Chlorinated
Other
Total
dioxane
ethenes
ethanes
organics
contaminant
mass
9
9
9
9
9
Mechanical
8,900
18,200
9,600
13,500
50,200
system influent
STEP 1
Mechanical
(Mechanical
7,200
225
116
357
7,898
system effluent
Treatment
Percent
System)
contaminant
19.1 %
98.8%
98.8%
99.7
84.3%
removal
Mechanical
system effluent
7,200
225
116
357
7,898
(Phyto system
influent
STEP 2
Phyto system
(Phytoremediation
effluent
21
ND
ND
ND
21
System)
(Drainage
water
Percent
contaminant
99.7%
100%
100%
100%
>99.9%
removal
Overall percent
99.8%
100%
100%
100%
>99.9%
contaminant removal
Figure 6 - Calculation of the Contaminant Removal Efficiency for the Seaboard System.
Third Quarter Data, percent contaminant removal is calculated for each step in
the treatment process as well as for the combined process.

SEABOARD GROUP II AND THE CITY OF HIGH POINT
February 26, 2018
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Quarterly Remedial Action Progress Report, 4th Quarter 2017
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point, NC (Parties) are providing this 4th Quarter
2017 Remedial Action Progress Report for the former Seaboard Chemical Corporation facility
(SCC) and closed Riverdale Drive Landfill (Landfill) located in Jamestown, NC (the Site).
During the 2017 calendar year, the mechanical and phytoremediation treatment systems
processed 8,574,00 gallons of extracted groundwater and leachate. During the 4th Quarter 2017,
the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
November 4, 2017
2.2 days
Power Failure
November 11, 2017
1.8 days
PW-DR1 Pump Failure
November 14, 2017
1.9 days
PW-DR1 Pump Repairs
December 1, 2017
5.0 days
P-601 A&B pumps cleaned/de-scaled
December 11, 2017
4.0 days
Routine citric acids stem cleaning
As discussed in the 3rd Quarter 2017 Report, the Parties have evaluated response actions to
protect the system electronics from future lightning strikes and other power fluctuations. This
evaluation was taken in response to the 55 day shutdown which occurred due to a lightning strike
on June 19, 2017. The entire system has been inspected by an electrical contractor and the
Parties have received recommendations for upgrades to the surge suppression and UPS backup
systems. The Parties are in the process of implementing the approved recommendations and
these activities should be completed during the lst Quarter of 2018 .

The attached Figures and Tables provide the results of the full scale operation of the treatment
System during the 4th Quarter 2017, including: Operating Data, Process Flow Data, Well Static
Water Level Data, System Chemistry, Utility Data Use, and Contaminant Removal Efficiency.
Summary
At this time, the system is in full operation. Recommendations to upgrade the electrical surge
suppression and UPS backup systems have been approved and in the process of implementation.
Please contact Mr. Gary D. Babb, P.G. (919/325-0696) or Craig Coslett (610/435-1151) if there
are any questions or comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
'4�1 Z411--
Gary D. Babb, P.G.
President
Cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q4 2017
QUARTERLY
Units of
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
TOTALS
Measure
METER READING
LEACHATE (GALLONS)
2,039,357
2,085,660
2,129,851
2,169,251
2,217,613
2,264,227
2,326,206
2,420,853
2,496,578
2,538,134
2,607,974
2,682,010
2,718,999
2,791,398
752,041
GALLONS
LSl-RWs (GALLONS)
594,984
602,046
608,255
613,927
633,342
676,822
706,981
749,701
791,135
807,168
822,138
833,368
837,472
851,304
256,320
GALLONS
PWDR1(GALLONS)
3,364,776
3,549,501
3,679,899
3,832,101
4,014,686
4,195,431
4,280,485
4,379,212
4,499,036
4,574,177
4,617,004
4,676,021
4,711,632
4,801,625
1,436,849
GALLONS
SIS-RWs (GALLONS)
345,281
357,193
363,525
370,498
378,641
385,869
392,559
400,246
407,185
411,751
411,951
418,179
420,772
427,088
81,807
GALLONS
PHYTO DISCH. (GALLONS)
6,540,619
6,801,912
6,996,957
7,214,918
7,485,034
7,780,410
7,970,364
8,227,292
8,473,986
8,619,936
8,754,240
8,916,654
8,996,684
9,184,816
2,644,197
GALLONS
AIR STRIP. RUNTIME (HRS)
3,862
4,023
4,161
4,309
4,471
4,633
4,744
4,889
5,048
5,144
5,235
5,359
5,414
5,528
1,666
76.3%
LSl COMP RUN (HOURS)
5,522
5,587
5,644
5,671
5,724
5,836
5,914
6,031
6,163
6,240
6,316
6,398
6,435
6,514
992
HOURS
LSl COMP LOAD (HOURS)
418
427
434
440
448
462
472
487
505
516
526
537
541
550
132
HOURS
LS2 COMP RUN (HOURS)
6,567
6,672
6,801
6,908
7,049
7,120
7,185
7,242
7,286
7,312
7,317
7,425
7,477
7,578
1,011
HOURS
LS2 COMP LOAD (HOURS)
841
847
860
868
885
889
896
900
904
907
907
910
912
916
75
HOURS
ELECT. UPPER (kW-Hr)
7,227
7,266
7,297
7,338
7,386
7,434
7,478
7,566
7,627
7,697
7,741
7,824
7,872
7,941
714
KW-HR
WATER METER (CF)
383,770
384,853
385,292
386,636
387,045
387,900
387,975
388,053
32,037
GALLONS
BACKWASH PUMP (GAL.)
131,750
137,353
139,978
140,195
140,483
140,716
8,966
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
7,190
24,406
40,121
50,499
58,455
69,487
74,284
85,029
85,029
GALLONS
ZONE 2
inclividu
jLzQne
6,862
23,884
38,630
48,362
55,845
67,030
71,589
82,180
82,180
GALLONS
ZONE 3
7,502
23,880
39,447
50,198
58,573
69,874
74,799
87,000
87,000
GALLONS
ZONE
ir igation
clata
7,477
22,026
38,390
49,616
58,520
68,808
74,348
86,912
86,912
GALLONS
ZONE 5
8,450
25,527
42,604
53,735
62,347
73,609
79,639
92,429
92,429
GALLONS
ZONE 6
8,745
25,407
43,034
54,246
63,267
74,579
79,828
91,718
91,718
GALLONS
ZONE 7
8,146
24,644
40,119
51,193
58,582
68,235
74,013
86,380
86,380
GALLONS
ZONE 8
9,079
26,955
44,428
56,159
65,294
76,263
82,501
95,908
95,908
GALLONS
ZONE 9
7,418
23,444
38,944
47,643
55,816
64,833
70,393
82,083
82,083
GALLONS
ZONE 10
8,549
25,988
42,925
52,298
62,484
73,599
79,950
92,317
92,317
GALLONS
ZONE 11
4,263
14,219
23,918
29,008
34,434
39,484
42,419
50,247
50,247
GALLONS
ZONE 12
-
8,806
26,181
42,990
52,606
59,918
70,338
75,608
88,625
88,625
GALLONS
ZONE 13
-
7,588
22,329
37,682
46,133
53,324
63,438
68,801
80,120
80,120
GALLONS
ZONE 14
-
6,633
23,503
38,007
47,928
54,604
65,167
70,010
81,260
81,260
GALLONS
ZONE 15
-
4,688
15,638
26,299
32,565
37,261
44,383
47,497
54,296
54,296
GALLONS
DAILY AVERAGE
AVERAGE
AVERAGE RUNTIME
961,,
82%
88%
97%
96%
66%
60%
95%
45%
76%
57%
38%
68%
74%
AVERAGE FLOW (GPM)
25.9
19.3
21.6
26.8
29.3
18.8
17.8
24.5
11.3
18.7
12.51
9.3
18.7
19.6
GPM
EFF. DISCH. (GALLONS)
37,328
27,864
31,137
38,588
42,197
27,136
25,693
35,242
16,217
26,861
18,046
13,338
26,876
28,194
GPD
TOTAL INFLUENT (GALLONS)
35,715
26,733
29,178
36,929
39,724
26,269
24,378
34,846
15,255
25,567
16,723
13,216
26,077
26,970
GPD
INF. LEACHATE (GALLONS)
6,615
6,313
5,629
6,909
6,659
8,854
9,465
10,818
4,617
13,968
8,226
6,165
10,343
8,045
GPD
INF. LS1-RWs (GALLONS)
1,009
887
810
2,774
6,211
4,308
4,272
5,919
1,781
2,994
1,248
684
1,976
2,683
GPD
INF. PWDRl (GALLONS)
26,389
18,628
21,743
26,084
25,821
12,151
9,873
17,118
8,349
8,565
6,557
5,935
12,856
15,390
GPD
INF. SIS-RWs(GALLONS)
1,702
905
996
1,163
1,033
956
769
991
507
40
692
432
902
853
GPD
WEEKLY RUNTIME (DAYS)
6.7
5.7
6.2
6.8
6.7
4.6
4.2
6.6
3.1
5.3
4.0
2.7
4.7
5.2
DAYS/WK
LSl COMP RUN (HRS)
9.3
8.1
3.9
7.6
16.0
11.1
11.7
18.9
8.6
15.2
9.1
6.2
11.3
10.5
HRS/DAY
LSl COMP LOAD (HRS)
1.3
1.0
0.9
1.1
2.0
1.4
1.5
2.6
1.2
2.0
1.2
0.7
1.3
1.4
HRS/DAY
LS2 COMP RUN (HRS)
15.0
18.4
15.3
20.1
10.1
9.3
5.7
6.3
2.9
1.0
12.0
8.7
14.4
10.7
HRS/DAY
LS2 COMP LOAD (HRS)
0.9
1.9
1.1
2.4
0.6
1.0
0.4
0.6
0.3
0.3
0.3
0.6
0.8
HRS/DAY
ELECTRICITY(kW-Hr)
5.6
4.4
5.9
6.9
6.9
6.3
8.8
8.7
7.8
8.8
9.2
8.0
9.9
7.5
kW-HR/DAY
CITY WATER (GALLONS)
810
469
1,117
613
711
94
83
557
GPD
BACKWASH PUMP (GAL.)
623
525
24
48
33
251
GPD
EFFLUENT LABS
Fe (mg/L)
0.53
0.251
0.68
0.7
1.03
1.98
1.86
1.3
3.5
2.08
0.83
0.39
0.18
1.2
mg/L
pH
6.81
6.81
6.64
6.53
6.35
7.35
6.86
7.1
7.09
7.00
6.91
7.13
6.82
6.9
m/L
ORP(mV)
62
38
30
28
237
112
203
114
73
59
86
68
74
91
mV
CON (uS/cm)
1893
1834
1832
1900
2700
1997
1,990
1,953
1,984
2,127
1,815
1,944
1,874
1,988
uS/cm
TDS (mg/L)
1360
1315
1318
1372
2164
1450
1,442
1,415
1,430
1,556
1,305
1,411
1,361
1,454
mg/L
TSS (mg/L)
5
16
30
14
21
18
4
27
20
17
13
1 10
7
15.5
mg/L
COD(mg/L)
54
54
70
127
118
95
86
94
128
98
60
63
66
86
mg/L
WELL LEVELS
AVERAGE
Change
OWDR-4
682.16
672.17
671.02
670.62
669.76
671.80
672.96
673.47
672.58
673.11
676.01
676.27
673.17
679.76
673.3
(8.88)
OWDR-2
681.90
671.35
670.42
670.05
669.17
671.24
672.50
673.05
672.13
672.73
676.21
676.04
672.80
679.75
672.9
(9.02)
PWDR-1
689.23
658.99
669.49
666.49
662.84
659.86
665.88
668.53
662.81
662.69
681.75
670.54
666.69
685.66
667.9
(21.37)
OWDR-3
681.24
680.10
680.30
679.88
679.97
679.65
679.58
679.56
679.47
679.38
679.17
679.28
679.27
679.6
(1.61)
PW-6D
680.37
674.73
674.84
674.89
674.87
675.14
677.15
676.29
673.47
675.2
(5.20)
OWLFS-2
680.00
668.38
662.89
662.91
662.90
662.90
662.99
662.86
662.89
660.72
664.65
664.63
664.4
(15.65)
PW-16D
680.13
675.04
675.35
673.36
674.61
675.11
675.28
674.93
676.26
674.26
675.77
678.18
674.3
(5.81)
PW-15D
682.74
678.63
678.18
678.91
677.26
678.09
678.60
678.62
678.34
679.30
679.53
679.08
680.24
678.8
(3.98)
ESTIMATED LAKE LEVEL
680.6
680.4
680.3
680.1
680.2
680.3
680.3
680.3
679.6
679.6
679.60
679.60
680.0
(0.57)
SOURCE WATER
I
PWDR-1
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
LEACHATE(LCHT)
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
LS-1 RECOVERY WELLS (LS1-RWs)
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
SIS RECOVERY WELLS (SIS-RWs)
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YESI
YES
Figure 1 - Operating Data

45000
35000
z 30000
O
J
J
Q
3 25000
O
J
LL
J
c 20000
W
a
W
Q 15000
10000
01111I1M
SEABOARD Q4 2017
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
8
7
6
5
INF. LEACHATE (GALLONS)
-INF. LS1-RWs (GALLONS)
4 �+
E
INF. PWDR1 (GALLONS)
Cr
INF. SIS-RWs (GALLONS)
3
EFF. DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
2
1
0
Figure 2 - Process Flow Data

695.00
1.13-111I1M
680.00
J
W
W
J
J
J
W
3: 675.00
670.00
665.00
SEABOARD Q4 2017
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
OWDR-4
OWDR-2
PWDR-1
-0-OWDR-3
--I- PW-6D
-4--OWLFS-2
PW-16D
PW-15D
ESTIMATED LAKE LEVEL
Figure 3 - Well Static Water Level Data

35
RIM
25
N 20
x
a
O
0
15
10
5
0
SEABOARD Q4 2017
1 2 3 4 S 6 7 8 9 10 11 12 13
WEEK
3000
M1111]
2000
o
Fe (mg/L)
O
u
DO (mg/L)
vi
pH
1500 0
ZO
TSS (mg/L)
c�
a
ORP (mV)
O
COND (uS/cm)
1000
TDS (mg/L)
COD (mg/L)
500
0
Figure 4 - System Chemistry

25.0
20.0
Ln
W
a
c�
°; 15.0
a
J
a
0
O
Ln
W
a 10.0
5
O
U
5.0
SEABOARD Q4 2017
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
12.0
10.0
W
a
8.0 W
a
J
a
z
6.0
a
N
Z
O
U
4.0 �
O
0-
we]
LS1 COMP RUN (HRS)
LS1 COMP LOAD (HRS)
LS2 COMP RUN (HRS)
LS2 COMP LOAD (HRS)
ELECTRICITY (kW-Hr)
Figure 5 - Utility Use Data

Contaminant
Masses
STEP
1,4_
Chlorinated
Chlorinated
Other
Total
dioxane
ethenes
ethanes
organics
contaminant
mass
9
9
9
9
9
Mechanical
8,900
18,200
9,600
13,500
50,200
system influent
STEP 1
Mechanical
(Mechanical
7,200
225
116
357
7,898
system effluent
Treatment
Percent
System)
contaminant
19.1 %
98.8%
98.8%
99.7
84.3%
removal
Mechanical
system effluent
7,200
225
116
357
7,898
(Phyto system
influent
STEP 2
Phyto system
(Phytoremediation
effluent
21
ND
ND
ND
21
System)
(Drainage
water
Percent
contaminant
99.7%
100%
100%
100%
>99.9%
removal
Overall percent
99.8%
100%
100%
100%
>99.9%
contaminant removal
Figure 6 - Calculation of the Contaminant Removal Efficiency for the Seaboard System.
Third Quarter Data, percent contaminant removal is calculated for each step in
the treatment process as well as for the combined process.

SEABOARD GROUP II AND THE CITY OF HIGH POINT
May 30, 2018
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Quarterly Remedial Action Progress Report, 1st Quarter 2018
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point (Parties) are providing this 1st Quarter 2018
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility and
closed Riverdale Drive Landfill located in Jamestown, NC (Site).
During the first quarter of 2018, the mechanical and phytoremediation treatment systems
processed 2,133,825 gallons of extracted groundwater and leachate. Also during the first quarter
of 2018, the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
January 2, 2018
10.0 days
Frozen distribution lines
January 24, 2018
2.0 days
P-601 pump seized
January 26, 2018
2.0 days
Power failure
February 12, 2018
4.0 days
Installation of sure suppression
Februaa 20, 2018
7.5 days
Filters clogged, system citric acid cleaning
March 1, 2018
6.5 days
UPS installation, communication issues
March 20, 2018
2.0 days
P-121 pump de -scaled, tested plow motor
As discussed in the 4th Quarter 2017 report, the entire system has been inspected by an electrical
contractor and the Parties have implemented the approved recommendations. The
recommendations included additional electrical surge suppression and UPS backup systems,
which were installed by the contractor on February12 and March 1, 2018.
During the week of February 20, 2018, the Parties retained Hazen Sawyer consulting firm to re-
evaluate the mechanical treatment process and provide recommendations to improve the
efficiency of the system. The following recommendations were provided by Hazen Sawyer:

• Move the location of air sparging to prior to the clarifier to pretreat the influent and
increase the efficiency of the clarifier. This will be accomplished by adding a 300 gallon
sparge tank prior to the clarifier influent.
• Based on jar testing data, the type and location for the injection of the sequestering agent
is being modified. This modification should result in the reduction of fouling on
equipment and further reduce operational downtime to clean process equipment.
• The purchase of additional in-house laboratory testing equipment to provide real time
operating information and better monitor and control chemical additions to the treatment
process.
Implementation of these recommendations is currently underway and is scheduled to be
implemented by the third quarter of 2018.
A routine annual Compliance Evaluation Inspection was conducted at the Site on March 2, 2018
by Mr. Jack Kitchen of the NC Hazardous Waste Section. The sole recommendation of this
inspection was to locate, repair, and/or abandon all groundwater monitoring wells at the Site as
necessary to maintain compliance with the NC Well Construction Standards. A letter requesting
authorization to abandon monitoring wells no longer needed was submitted on May 4, 2018 to
the NC Hazardous Waste and Solid Waste Sections. The existing monitoring wells not
scheduled for abandonment have been inspected and the necessary repairs are underway.
The attached Figures and Tables provide the results of the full scale operation of the treatment
System during the first quarter of 2018, including: Operating Data, Process Flow Data, Static
Water Level Data, System Chemistry, Utility Data Use, and Contaminant Removal Efficiency.
Summary
At this time, the system is in full operation. Recommendations to upgrade or maintain the
mechanical treatment system and monitoring well network have been identified and are in the
process of implementation. Abandonment of monitoring wells that are no longer used or
necessary will be completed upon receipt of approval from the NC Hazardous Waste and Solid
Waste Sections.
Please contact Mr. Gary D. Babb, P.G. (919/605-4719) or Craig Coslett (610/435-1151) if there
are any questions or comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104

Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
4//", xLaelll
Gary D. Babb, P.G.
President
Cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

50000
z 40000
O
J
J
Q
O
30000
J
a
0
W
Q
a
W
a 20000
10000
m
SEABOARD Q12018
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
8
7
6
5
T
--*--INF. LEACHATE (GALLONS)
ca
fINF. LS1-RWs (GALLONS)
4
r
fINF. PWDR1 (GALLONS)
--X—INF. SIS-RWs (GALLONS)
3
--OKEFF. DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
2
1
0
Figure 2 - Process Flow Data

695.00
685.00
680.00
J
W
W
J
J
J
W
3: 675.00
670.00
665.00
SEABOARD Q1 2018
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
tOWDR-4
fOWDR-2
fPWDR-1
--X—OWDR-3
--I— PW-6D (696.79)
-4--OWLFS-2
PW-16D
PW-15D
ESTIMATED LAKE LEVEL
Figure 3 - Static Water Level Data

60
50
40
_
° 30
oV00000
20
10
0
SEABOARD Q1 2018
2,500
2,000
tFe (mg/L)
1,500 0
f DO (mg/L)
�pH
0
z TSS (mg/L)
U
a --O—ORP
1,000 0-I-COND
—O—TDS (mg/L)
COD (mg/L)
500
-
At
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
Figure 4 - System Chemistry

pw1,
20.0
Ln
W
a
°CW 15.0
a
J
a
0
O
Ln
W
a 10.0
5
O
U
5.0
SEABOARD Q1 2018
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
25.0
20.0
W
a
W
a
15.0
a
5.0
LS1 COMP RUN (HOURS)
LS1 COMP LOAD (HOURS)
LS2 COMP RUN (HOURS)
LS2 COMP LOAD (HOURS)
ELECTRICITY (kW-Hr)
Figure 5 - Utility Use Data

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Mechanical
Treatment
System
Influent
7.6
20
11.3
14.4
53.3
Effluent
8.8
1.3
0.7
1.3
12.1
Contaminant
Removal
<
93.5%
93.8%
91.0%
77.3%
Irrigation
8,800
1,300
700
1,300
12,100
water
Drainage
water
Lys 2
444
nd
1.4
nd
445
Lys 8
12.1
nd
nd
nd
12.1
Step 2
Lys 10
1,100
nd
nd
nd
1,100
Phytoremediation
Lys 11B
446
nd
nd
nd
446
System*
Lys 12
882
nd
nd
123
1,005
Lys 13
1,352
nd
41.9
388
1,782
Average
n=5 *
885 ±
359
nd
8.6
102.2
956
%
90.4 ±
Contaminant
Removal
4•1 %
(86.3 -
94.5
100%
98.7
92.2
92.1
Overall Percent Contaminant
Removal
88.3%
100%
99.9%
99.3%
* Lysimeter 8 appeared to be an outlier in terms of the contaminant masses in the leachate: data for
lysimeter 8 were not included in the calculation of the average.
Figure 6 - Contaminant Removal Efficiency

SEABOARD GROUP II AND THE CITY OF HIGH POINT
August 15, 2018
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Quarterly Remedial Action Progress Report, 2nd Quarter 2018
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point (Parties) are providing this 2nd Quarter 2018
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility and
closed Riverdale Drive Landfill located in Jamestown, NC (Site).
During the second quarter of 2018, the mechanical and phytoremediation treatment systems
processed 1,983,903 gallons of extracted groundwater and leachate. Also during the second
quarter of 2018, the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
April 12, 2018
1.5 days
I/O card failure in Filter Building
April 27, 2018
2.5 days
LS 1 compressor not loading
May 14, 2018
3.0 days
Filter Building compressor down
May 18, 2018
21.0 days
Install new aeration tank and citric wash
June 9, 2018
2.0 days
Communication issue with LS 1
Treatment System Modifications
During the week of February 20, 2018, the Parties retained Hazen Sawyer consulting firm to
evaluate the mechanical treatment process and provide recommendations to improve the
efficiency of the system. As discussed in the 2018 1 st Quarter Progress Report, the
recommendations provided by Hazen Sawyer included: 1) installation of a new aeration tank
prior to the clarifier influent, 2) modifications to the sequestering agent, and 3) purchase of
additional in-house lab testing equipment. These recommendations were implemented during
May 2018 which resulted in a 21 day suspension of operations.
The following benefits to the treatment system have been noted since completion of the
recommended modifications:

• Lab results of effluent from the mechanical treatment system have shown the following:
Prior to modifications:
March Effluent: Ca - 239,000 µg/L, Fe - 547 µg/L, Mn — 1,410 µg/L
Following Lime and Ferric feed rate modifications:
April Effluent: Ca - 112,000 µg/L, Fe - 969 µg/L, Mn - 231 µg/L
Following installation of new aeration tank:
June Effluent: Ca - 19,000 µg/L, Fe - 38 µg/L, Mn - 16 µg/L
• Runtimes between filter backwashes have improved from 1 day to 14 days.
• Bag filter maintenance has improved from every 3-4 days to 7 days.
Well Abandonments
Based on a recent survey of existing monitoring wells at the Site, an effort has been completed to
maintain and/or abandon existing groundwater monitoring wells at the Site as necessary to
maintain compliance with the NC Well Construction Standards. A letter requesting
authorization to abandon select monitoring wells was submitted on May 4, 2018 to the NC
Hazardous Waste Section and subsequently approved on June 5, 2018.
A total of twenty-six wells have been abandoned and a copy of the Well Abandonment Records
(Form GW-30) is provided in Appendix A of this Progress Report. In addition, all remaining
groundwater monitoring wells have been inspected and maintained as necessary to be compliant
with the NC Well Construction Standards.
During abandonment of the groundwater monitoring wells, one potable well located near the
entrance to the Riverdale Drive Landfill was also abandoned. This out -of -service potable well
was approximately 550' in depth and was closed in accordance with the NC Well Construction
Standards. Closure of this potable well satisfies the requirement set forth in the Remedial Action
Settlement Agreement, Exhibit A — Scope of Work, Section (L)(7).
The attached Figures and Tables provide the results of the full scale operation of the treatment
System during the second quarter of 2018, including: Operating Data, Process Flow Data, Static
Water Level Data, System Chemistry, Utility Data Use, and Contaminant Removal Efficiency.

Summary
At this time, the system is in full operation. All recommendations regarding upgrades or
maintenance to the mechanical treatment system and monitoring well network have been
completed.
Please contact Mr. Gary D. Babb, P.G. (919/605-4719) or Craig Coslett (610/435-1151) if there
are any questions or comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
�XL��e
Gary D. Babb, P.G.
President
Cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q2 2018
Quarterly
Units of
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
e
LEACHATE (GALLONS)
3,689,528
3,806,905
3,885,363
3,933,480
4,015,848
4,106,081
4,172,518
4,172,518
4,172,518
4,172,518
4,207,291
4,297,487
4,354,190
4,424,758
735,230
GALLONS
LS1-RWs (GALLONS)
1,009,062
1,021,477
1,036,194
1,048,461
1,056,145
1,069,729
1 1,077,227
1,077,227
1,077,227
1 1,077,227
1,086,334
1,098,758
1,110,452
1,119,445
1 110,383
GALLONS
PWDR1(GALLONS)
5,696,720
5,795,976
5,876,346
5,978,622
6,049,495
6,151,421
6,217,502
6,217,502
6,217,502
6,217,502
6,255,598
6,365,543
6,470,134
6,579,951
883,231
GALLONS
SIS-RWs (GALLONS)
541,396
558,273
571,942
588,167
603,861
618,919
632,444
632,444
632,444
632,444
637,411
645,468
652,989
660,301
118,905
GALLONS
PHYTO DISCH. (GALLONS)
1,318,641
1,565,534
1,760,112
1,951,902
2,147,901
2,390,768
2,561,825
2,561,825
2,561,825
2,561,825
2,681,404
2,912,374
3,097,036
3,302,544
1,983,903
GALLONS
AIR STRIP. RUNTIME (HRS)
6,800
6,946
7,061
7,204
7,303
7,465
7,573
7,573
7,573
7,573
7,633
7,778
7,939
8,098
1,299
59.5%
LSl COMP RUN (HOURS)
7,700
7,854
7,973
8,113
8,216
8,378
8,491
8,491
8,491
8,491
8,548
8,698
8,866
9,029
1,329
HOURS
LSl COMP LOAD (HOURS)
688
708
725
734
749
765
778
778
778
778
784
802
817
832
144
HOURS
LS2 COMP RUN (HOURS)
8,480
8,611
8,715
8,849
8,941
9,082
9,186
9,186
9,186
9,186
9,217
9,329
9,485
9,612
1,132
HOURS
LS2 COMP LOAD (HOURS)
981
991
999
1,011
1,019
1,031
1,038
1,038
1,038
1,038
1,042
1,049
1,057
1,065
84
HOURS
ELECT. UPPER (kW-Hr)
8,916
8,997
9,066
9,146
9,213
9,265
9,302
9,302
9,302
9,302
9,373
9,403
9,434
9,463
547
KW-HR
WATER METER (CF)
395,347
395,732
395,977
396,215
396,511
396,979
397,681
397,681
397,681
397,681
406,064
406,143
406,403
406,573
66,512
GALLONS
BACKWASH PUMP (GAL.)
170,959
172,948
173,854
174,765
176,583
179,308
183,459
183,459
183,459
183,459
186,929
186,929
187,389
187,389
3,930
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
231,887
248,879
261,714
273,683
286,848
304,944
316,759
316,759
316,759
316,759
322,113
337,700
350,339
365,325
133,438
GALLONS
ZONE 2
226,702
242,779
255,508
267,542
280,137
297,706
306,846
306,846
306,846
306,846
312,746
329,936
337,256
350,142
123,440
GALLONS
ZONE 3
237,102
255,159
268,987
283,454
296,944
297,770
308,922
308,922
308,922
308,922
315,335
331,084
343,690
357,688
120,586
GALLONS
ZONE
231,704
247,297
259,783
272,206
284,550
300,832
310,832
310,832
310,832
310,832
316,564
330,940
343,124
355,839
124,135
GALLONS
ZONE 5
244,151
262,540
275,132
289,176
302,534
320,187
322,440
322,440
322,440
322,440
339,181
356,113
369,449
384,134
139,983
GALLONS
ZONE
239,858
257,544
270,919
285,093
299,405
317,273
329,214
329,214
329,214
329,214
336,060
353,193
366,801
381,437
141,579
GALLONS
ZONE 7
231,542
248,819
261,772
275,231
289,026
307,247
319,059
319,059
319,059
319,059
325,477
340,345
353,961
368,226
136,684
GALLONS
ZONE 8
245,060
263,680
277,876
291,814
306,364
325,684
338,944
338,944
338,944
338,944
345,720
362,249
375,703
390,057
144,997
GALLONS
ZONE 9
227,264
245,056
257,109
270,772
283,570
302,205
314,016
314,016
314,016
314,016
320,524
337,661
351,238
366,642
139,378
GALLONS
ZONE 10
249,930
263,468
277,584
292,626
307,599
328,910
342,626
342,626
342,626
342,626
349,618
367,982
382,450
399,253
149,323
GALLONS
ZONE 11
118,341
124,230
129,263
134,078
139,414
145,731
150,159
150,159
150,159
150,159
152,682
157,679
162,075
167,337
48,996
GALLONS
ZONE 12
218,938
230,730
241,758
250,984
260,496
273,832
281,805
281,805
281,805
281,805
286,416
297,452
306,351
316,556
97,618
GALLONS
ZONE 13
171,557
182,220
192,062
200,500
209,124
220,476
228,119
228,119
228,119
228,119
231,406
240,413
247,894
256,941
85,384
GALLONS
ZONE 14
204,202
220,753
233,767
246,922
260,638
279,163
291,036
291,036
291,036
291,036
296,440
312,007
324,194
338,497
134,295
GALLONS
ZONE 15
151,083
162,466
170,791
179,118
187,950
199,958
207,789
207,789
207,789
207,789
211,457
220,354
228,158
238,223
87,140
GALLONS
DAILYAVERAGE
I Average
Units
AVERAGE RUNTIME
87%
69%
85%
59%
96%
65%
0%
0%
0%
36%
86%
96%
95%
59%
%
AVERAGE FLOW (GPM)
24.5
19.3
19.0
19.4
24.1
17.0
0.0
0.0
0.0
11.9
22.9
18.3
20.4
15.1
GPM
EFF. DISCH. (GALLONS)
35,270
27,797
27,399
28,000
34,695
24,437
17,083
32,996
26,380
29,358
21,801
GPD
TOTAL INFLUENT (GALLONS)
35,132
26,745
25,555
25,231
31,543
21,934
12,420
31,517
25,787
28,099
20,305
GPD
INF. LEACHATE (GALLONS)
16,768
11,208
6,874
11,767
12,890
9,491
4,968
12,885
8,100
10,081
8,079
GPD
INF. LS1-RWs (GALLONS)
1,774
2,102
1,752
1,098
1,941
1,071
1,301
1,775
1,671
1,285
1,213
GPD
INF. PWDR) (GALLONS)
14,179
11,481
14,611
10,125
14,561
9,440
5,442
15,706
14,942
15,688
9,706
GPD
INF. SIS-RWs (GALLONS)
2,411
1,953
2,318
2,242
2,151
1,932
710
1,151
1,074
1,045
1,307
GPD
WEEKLY RUNTIME (DAYS)
6.1
4.8
5.9
4.1
6.7
4.5
2.5
6.0
6.7
6.6
4.2
DAYS/WK
LSl COMP RUN (HOURS)
22.0
17.0
20.0
14.7
23.1
16.1
8.1
21.4
24.0
23.3
14.6
HRS/DAY
LSl COMP LOAD (HOURS)
2.9
2.4
1.3
2.1
2.3
1.9
0.9
2.6
2.1
2.1
1.6
HRS/DAY
LS2 COMP RUN (HOURS)
18.7
14.9
19.1
13.1
20.1
14.9
4.4
16.0
22.3
18.1
12.4
HRS/DAY
LS2 COMP LOAD (HOURS)
1.4
1.1
1.7
1.1
1.7
1.0
0.6
1.0
1.1
1.1
0.9
HRS/DAY
ELECTRICITY(kW-Hr)
11.6
9.9
11.4
9.6
7.4
5.3
10.1
4.3
4.4
4.1
6.0
kW-HR/DAY
CITY WATER (GALLONS)
55.0
35.0
34.0
42.3
67
100
1,198
11
37
24
123
GPD
BACKWASH PUMP (GAL.)
284.1
129.4
130.1
259.7
389
593
496
66
181
GPD
EFFLUENT LABS
Fe (mg/L)
2.15
0.98
0.59
0.23
1.26
0.76
2.05
0.51
0.05
0.22
0.08
0.7
mg/L
pH
6.84
6.6
6.92
6.34
6.51
6.45
6.45
7.12
6.62
6.06
6.48
6.6
m/L
ORP
91
82
81
78
106
3
2
103
117
71
84
73
mV
COND
1655
1237
1373
1281
1278
1568
1548
1,129
1,235
1,037
1,158
1,284
uS/cm
TDS(mg/L)
1182
876
967.9
905.6
901.1
1116
1088
780
853
713
798
900
m77
TSS (mg/L)
23
4
10
0
3
5
3
7
4
2
3.8
mg/L
COD (mg/L)
84
73
101
75
76
69
145
143
139
84
73
98
mg/L
WELL LEVELS
ff Change
OWDR-4
682.16
677.49
679.34
676.39
676.75
677.67
682.38
677.85
675.78
676.66
676.77
677.7
OWDR-2
681.90
677.19
678.94
676.03
676.40
677.39
681.90
678.17
675.42
676.36
676.48
677.4
(4.47)
PWDR-1
689.23
670.46
668.57
665.83
665.52
665.79
686.83
681.72
665.62
665.53
663.51
669.9
(19.29)
OWDR-3
681.80
681.75
681.97
682.23
681.69
681.86
681.46
681.10
681.7
(0.08)
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
678.37
680.18
678.56
680.52
678.68
677.51
677.59
677.89
678.7
(1.86)
PW-15D
683.12
681.55
683.12
681.21
682.0
(1.16)
ESTIMATED LAKE LEVEL
680.7
682.4
682.4
682.4
682.3
682.3
682.3
682.3
682.3
682.3
682.3
682.3
682.30
682.30
682.3
SOURCE WATER
PWDR-1
YES
YES
YES
YES
YES
YES
YES
no
no
no
YES
YES
YES
YES
NA
NA
LEACHATE(LCHT)
YES
YES
YES
YES
YES
YES
YES
no
no
no
YES
YES
YES
YES
NA
NA
LS-1 RECOVERY WELLS (LS1-RWs)
IYES
YES
YES
YES
YES
YES
YES
no
no
no
YES
YES
YES
YES
NA
NA
SIS RECOVERY WELLS (SIS-RWs)
IYES
YES
YES
YES
YES
YES
YES
no
no
nol
YES
YES
YES
YES
NA
NA
Figure 1 - Operating Data [Note: System shutdown weeks 7, 8, and 9 for installation of new aeration tank]

40000
35000
30000
V
z
25000
J
a
O
J
- 20000
J
a
0
W
15000
W
a
10000
m
SEABOARD Q2 2018
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
8
7
6
5
T
--*--INF. LEACHATE (GALLONS)
ca
fINF. LS1-RWs (GALLONS)
4
r
fINF. PWDR1 (GALLONS)
--X—INF. SIS-RWs (GALLONS)
3
--OKEFF. DISCH. (GALLONS)
---4. WEEKLY RUNTIME (DAYS)
2
1
0
Figure 2 - Process Flow Data

695.00
685.00
680.00
J
W
W
J
J
J
W
3: 675.00
670.00
665.00
SEABOARD Q2 2018
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
tOWDR-4
fOWDR-2
fPWDR-1
--X—OWDR-3
--I— PW-6D (696.79)
—4--OWLFS-2
PW-16D
PW-15D
ESTIMATED LAKE LEVEL
Figure 3 - Static Water Level Data

fl
o
LL
12
10
8
6
4
2
0
SEABOARD Q2 2018
1,800
1,600
1,400
1,200
1,000
800
600
400
200
-
p
O
o
0
OZ
U
Q
O
tFe (mg/L)
f DO (mg/L)
pH
TSS (mg/L)
�-ORP
-I-COND
-O-TDS (mg/L)
COD (mg/L)
1 2 3 4 S 6 7 8 9 10 11 12 13
WEEK
Figure 4 - System Chemistry

25.0
vn 20.0
W
a
W
a
J
0 15.0
O
Ln
W
cr
a
5
O
u 10.0
all
SEABOARD Q2 2018
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
14.0
12.0
z
O
a
6.0 N
z
O
U
W
4.0 a
I►.1 t
LS1 COMP RUN (HOURS)
LS1 COMP LOAD (HOURS)
LS2 COMP RUN (HOURS)
LS2 COMP LOAD (HOURS)
ELECTRICITY (kW-Hr)
Figure 5 - Utility Use Data

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
k
Step 1
Influent
6.58
13.8
7.8
8.6
36.78
Mechanical
Effluent
6.55
0.072
0.046
0.026
6.69
Treatment
System
% Contaminant Removal
0.46%
99.5%
99.4
99.7
81.8%
Irrigation water
6,550
72
46
26
6,690
Drainage water
1,164
ND
ND
11.9
Lys 2 (vol. scaling factor, 276)
Step 2
Lys 8 vol. scalin actor, 415
5.3
ND
ND
ND
Phytoremediation
Lys 10 (vol. scalin actor, 410)
217
ND
ND
ND
System
Lys 11B vol. scalingfactor, 1,238
2,404
ND
ND
ND
Lys 12 (vol. scalin actor, 227)
1,271
ND
ND
38.6
Lys 13 vol. scalin actor, 363
1,032
ND
16.9
131.4
Average (n=6)
1,014
ND
2.8
30.3
1,047
% Contaminant Removal
84.5%
100%
93.9%
0%
84.3
Overall Percent Contaminant Removal
85.6%
100%
99.9%
99.7%
97.2%
* Conservative estimate based on theoretical calculations
Figure 6 - Contaminant Removal Efficiency

SEABOARD GROUP II AND THE CITY OF HIGH POINT
November 19, 2018
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Quarterly Remedial Action Progress Report, 3rd Quarter 2018
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point (Parties) are providing this 3rd Quarter 2018
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility and
closed Riverdale Drive Landfill located in Jamestown, NC (Site).
During the third quarter of 2018, the mechanical and phytoremediation treatment systems
processed 2,497,347 gallons of extracted groundwater and leachate. Also during the third
quarter of 2018, the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
August 2, 2018
1.0 days
Shutdown for routine compressor maintenance
August 12, 2018
22.5 da s
Communication loss with LS-1, multiple repairs
September 13, 2018
5.0 days
Hurricane Florence preparation
The extended shutdown during August 2018 was due to an electrical surge or lightning strike
which damaged the system electronics as well as the fiber optic cable between LS-1 and the
primary system controls. The repairs required several specialty vendors including fiber optic
repair technicians to identify and repair the damage.
The system was taken offline on September 13, 2018 prior to the arrival of Hurricane Florence to
prevent damage due to power surges, fluctuations, or outages. After the storm passed the system
was brought back online over a period of 2-3 days. No damage was observed to the treatment
system as a result of the storm.

The attached Figures and Tables provide the results of the full scale operation of the treatment
System during the third quarter of 2018, including: Operating Data, Process Flow Data, Static
Water Level Data, System Chemistry, Utility Data Use, and Contaminant Removal Efficiency.
Summary
Repairs due to an electrical surge in August 2018 have been completed and the system is back in
full operation. The effects of Hurricane Florence were minimal and no damage was sustained to
the treatment system as a result of the storm.
Please contact Mr. Gary D. Babb, P.G. (919/605-4719) or Craig Coslett (610/435-1151) if there
are any questions or comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
ItM11f1/!�!
4Q� S N S
Gary D. Babb, P.G. �F` SEAL 1"
President 488
r �y
r +Iola. kiolk"M
Cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q3 2018
Quarterly
Units of
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEKS
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
LEACHATE (GALLONS)
4,424,758
4,502,498
4,578,325
4,633,839
4,701,787
4,794,164
4,937,101
4,937,101
4,937,101
4,937,101
5,070,130
5,070,130
5,235,338
5,387,950
963,192
GALLONS
LSl-RWs (GALLONS)
1,119,445
1,123,935
1,131,759
1,141,676
1,150,322
1 1,185,475
1,214,859
1,214,859
1 1,214,859
1,214,859
1,246,858
1 1,246,858
1,310,091
1,343,837
1 224,392
GALLONS
PWDR1(GALLONS)
6,579,951
6,710,989
6,843,565
6,965,535
7,090,879
7,214,019
7,332,338
7,332,338
7,332,338
7,332,338
7,436,904
7,436,904
7,604,350
7,724,977
1,145,026
GALLONS
SIS-RWs (GALLONS)
660,301
667,335
673,424
673,674
680,724
693,153
704,834
704,834
704,834
704,834
720,286
720,286
742,721
762,277
101,976
GALLONS
PHYTO DISCH. (GALLONS)
3,302,544
3,527,116
3,759,177
3,949,216
4,172,001
4,444,465
4,753,500
4,753,500
4,753,500
4,753,500
5,041,185
5,041,185
5,465,572
5,799,891
2,497,347
GALLONS
AIR STRIP. RUNTIME (HRS)
8,098
8,257
8,421
8,564
8,715
8,855
8,993
8,993
8,993
8,993
9,132
9,132
9,342
9,490
1,391
59.5%
LSl COMP RUN (HOURS)
9,029
9,194
9,362
9,512
9,667
9,814
9,956
9,956
9,956
9,956
10,100
10,100
10,310
10,470
1,441
HOURS
LSl COMP LOAD (HOURS)
832
849
866
879
896
913
938
938
938
938
960
960
988
1,020
188
HOURS
LS2 COMP RUN (HOURS)
9,612
9,671
9,707
9,712
9,849
9,958
10,090
10,090
10,090
10,090
10,200
10,200
10,370
10,500
888
HOURS
LS2 COMP LOAD (HOURS)
1,065
1,070
1,076
1,077
1,084
1,095
1,109
1,109
1,109
1,109
1,117
1,117
1,127
1,136
71
HOURS
ELECT. UPPER (kW-Hr)
9,463
9,491
9,518
9,542
9,571
9,604
9,641
9,655
9,671
9,687
9,717
9,717
9,764
9,797
334
KW-HR
WATER METER (CF)
406,573
406,743
406,981
407,195
407,631
408,381
408,978
408,978
408,978
408,978
409,424
409,424
409,729
410,121
8,550
GALLONS
BACKWASH PUMP (GAL.)
187,389
187,846
188,307
189,226
191,189
195,505
199,275
199,275
199,275
199,275
201,110
201,110
202,028
203,858
4,583
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
365,325
380,776
397,083
412,045
428,027
448,045
470,867
470,867
470,867
470,867
494,192
494,192
524,375
547,641
182,316
GALLONS
ZONE 2
350,142
364,855
378,806
389,850
404,220
422,223
444,497
444,497
444,497
444,497
463,538
463,538
491,697
513,761
163,619
GALLONS
ZONE 3
357,688
373,859
389,044
402,525
417,415
436,662
459,743
459,743
459,743
459,743
488,640
488,640
510,650
534,813
177,125
GALLONS
ZONE
355,839
371,026
385,295
397,864
411,702
429,599
451,047
451,047
451,047
451,047
469,122
469,122
500,366
525,054
169,215
GALLONS
ZONE 5
384,134
400,360
416,832
430,946
445,606
465,990
489,599
489,599
489,599
489,599
510,222
510,222
541,806
565,108
180,974
GALLONS
ZONE 6
381,437
397,159
413,745
425,734
440,815
461,795
484,640
484,640
484,640
484,640
505,291
505,291
538,019
563,410
181,973
GALLONS
ZONE 7
368,226
383,441
400,651
412,830
428,485
448,833
471,790
471,790
471,790
471,790
491,760
491,760
522,753
546,701
178,475
GALLONS
ZONE 8
390,057
406,675
424,515
437,583
454,226
474,415
498,877
498,877
498,877
498,877
519,941
519,941
552,511
578,222
188,165
GALLONS
ZONE 9
366,642
383,408
400,185
413,939
430,898
452,203
476,926
476,926
476,926
476,926
498,205
498,205
530,862
557,001
190,359
GALLONS
ZONE 10
399,253
416,051
433,835
446,556
463,794
484,708
509,386
509,386
509,386
509,386
530,468
530,468
563,562
591,590
192,337
GALLONS
ZONE 11
167,337
172,898
179,569
184,518
189,929
197,216
206,012
206,012
206,012
206,012
217,673
217,673
224,524
224,524
57,187
GALLONS
ZONE 12
316,556
372,038
338,483
346,773
357,757
370,058
385,346
385,346
385,346
385,346
405,079
405,079
434,579
459,442
142,886
GALLONS
ZONE 13
256,941
266,393
276,546
283,759
292,623
304,443
317,908
317,908
317,908
317,908
336,898
336,898
364,490
387,845
130,904
GALLONS
ZONE 14
338,497
353,456
369,901
382,557
397,949
415,812
438,190
438,190
438,190
438,190
455,845
455,845
481,433
502,770
164,273
GALLONS
ZONE 15
238,223
248,258
258,922
267,151
277,352
283,514
283,514
283,514
283,514
283,514
283,514
283,514
283,514
(238,223)
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
94%
98%
85%
90%
84%
82%
0%
0%
0%
83%
0%
75%
88%
60%
%
AVERAGE FLOW (GPM)
22.3
23.0
18.9
22.1
27.0
30.7
0.0
0.0
0.0
28.5
0.0
32.7
33.2
18.3
GPM
EFF. DISCH. (GALLONS)
32,082
33,152
27,148
31,826
38,923
44,148
41,098
47,154
47,760
26,407
GPD
TOTAL INFLUENT (GALLONS)
31,472
31,759
26,807
29,855
37,586
43,189
40,721
46,480
46,649
25,732
GPD
INF. LEACHATE (GALLONS)
11,106
10,832
7,931
9,707
13,197
20,420
19,004
18,356
21,802
10,181
GPD
INF. LS1-RWs (GALLONS)
641
1,118
1,417
1,235
5,022
4,198
4,571
7,026
4,821
2,311
GPD
INF. PWDR) (GALLONS)
18,720
18,939
17,424
17,906
17,591
16,903
14,938
18,605
17,232
12,174
GPD
INF. SIS-RWs(GALLONS)
1,005
870
36
1,007
1,776
1,669
2,207
2,493
2,794
1,066
GPD
WEEKLY RUNTIME (DAYS)
6.6
6.8
5.9
6.3
5.8
5.7
5.8
6.8
6.2
4.3
DAYS/WK
LSl COMP RUN (HOURS)
23.6
24.0
21.4
22.1
21.0
20.3
20.6
23.3
22.9
15.3
HRS/DAY
LSl COMP LOAD (HOURS)
2.4
2.4
1.9
2.4
2.4
3.6
3.1
3.1
4.6
2.0
HRS/DAY
LS2 COMP RUN (HOURS)
8.4
5.1
0.7
19.6
15.6
18.9
15.7
18.9
18.6
9.3
HRS/DAY
LS2 COMP LOAD (HOURS)
0.7
0.9
0.1
1.0
1.6
2.0
1.1
1.1
1.3
0.8
HRS/DAY
ELECTRICITY(kW-Hr)
4.0
3.9
3.4
4.1
4.7
5.3
2.0
4.3
5.2
4.7
3.6
kW-HR/DAY
CITY WATER (GALLONS)
24.0
34.0
31.0
62.0
107
85
64
34
56
38
GPD
BACKWASH PUMP (GAL.)
65.0
66.0
131.0
280.0
617
539
262
102
261
179
GPD
EFFLUENT LABS
Fe (mg/L)
0.08
0.18
0.04
0.37
1.27
1.01
0
-
-
0.61
0
0.72
0.93
0.4
mg/L
pH
6.48
6.41
6.45
7.07
7.07
7.22
0
-
-
6.43
-
6.61
6.50
4.1
m/L
ORP
84
101
100
57
50
58
0
-
96
-
93
179
56
mV
COND
1,158
1,077
1064
1037
1049
1366
0
-
-
1,162
-
1,162
1,109
694
uS/cm
TDS (mg/L)
798
740
730.7
713.7
720.7
946.6
0
-
-
808
-
730
771
474
mg/L
TSS (mg/L)
1
2
0
12
6
0
-
-
1
-
1
11
2.6
mg/L
COD (mg/L)
73
60
81
74
67
94
0
-
-
-
45
-
146
68
49
mg/L
WELL LEVELS
A
OWDR-4
682.16
673.92
674.90
673.33
674.83
675.09
675.07
678.18
675.34
675.1
(7.08)
OWDR-2
681.90
673.48
674.42
672.87
674.43
674.63
658.94
677.55
674.91
672.7
(9.25)
PWDR-1
689.23
655.42
655.45
655.51
655.75
655.50
655.5
(33.70)
OWDR-3
681.80
681.24
680.57
680.58
681.71
681.93
681.53
681.3
(0.54)
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
676.20
676.84
676.93
677.37
676.8
(3.69)
PW-15D
683.12
ESTIMATED LAKE LEVEL
682.3
682.3
682.3
682.5
682.5
682.5
682.0
682.00
682.00
682.3
SOURCE WATER
PWDR-1
YES
YES
YES
YES
YES
YES
YES
No
No
No
YES
No
YES
YES
LS-1 RECOVERY WELLS
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
YES
NO
YES
YES
SIS RECOVERY WELLS
Yes
YES
YES
YES
YES
YES
YES
NO
NO
NO
YES
NO
YES
YES
Figure 1 - Operating Data [Note: System shutdown for 22.5 days in August for multiple repairs]

50000
z 40000
O
J
J
Q
O
J
LL 30000
J_
Q
W
a
W
a 20000
10000
0
SEABOARD Q3 2018
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
8
7
31
5
--*---INF. LEACHATE (GALLONS)
fINF. LS1-RWs (GALLONS)
4
INF. PWDR1 (GALLONS)
--)-(—IN F. SIS-RWs (GALLONS)
3 EFF. DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
N
1
0
Figure 2 - Process Flow Data

695.00
685.00
680.00
J
W
W
J
J
J
W
3: 675.00
670.00
665.00
SEABOARD Q3 2018
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
tOWDR-4
fOWDR-2
fPWDR-1
--X—OWDR-3
--I— PW-6D (696.79)
—4--OWLFS-2
PW-16D
PW-15D
ESTIMATED LAKE LEVEL
Figure 3 - Static Water Level Data

N
Q'
O
�i
14
12
10
8
6
4
2
0
SEABOARD Q3 2018
1,600
1,400
1,200
1,000
800
600
400
200
-
O
U
o
o
z
O
U
cl:
0
Fe (mg/L)
pH
TSS (mg/L)
--0(—ORP
COND
-TDS (mg/L)
COD (mg/L)
k INN,
F.
1 2 3 4 S 6 7 8 9 10 11 12 13
WEEK
Figure 4 - System Chemistry

911111]
25.0
vn 20.0
W
a
W
a
J
0 15.0
O
Ln
W
cr
a
5
O
u 10.0
all
SEABOARD Q3 2018
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
IMM
5.0
W
a
4.0 W
a
J_
a
z
3.0 O
a
N
z
O
U
2.0 �
O
a
1.0
LS1 COMP RUN (HOURS)
LS1 COMP LOAD (HOURS)
LS2 COMP RUN (HOURS)
LS2 COMP LOAD (HOURS)
ELECTRICITY (kW-Hr)
Figure 5 - Utility Use Data

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Influent
10.17
23.0
15.1
16.3
64.6
Mechanical
Effluent
7.41
0.068
0.054
0.048
7.58
Treatment
System
% Contaminant Removal
27.1
99.7
99.6
99.7
88.3
Irrigation water
9
9
7,410
68
54
48
7,580
Drainage water
296
ND
ND
10.8
307
Lys 2 (vol. scaling factor, 302)
Step 2
Lys 7 (vol. scaling factor, 377)
278
ND
ND
28.5
307
Phytoremediation
Lys 8 (vol. scaling factor, 452)
ND
ND
ND
ND
ND
System
Lys 10 (vol. scaling factor, 612)
36
ND
ND
ND
36
Lys 11B (v. scalingfactor,1373)
330
ND
ND
ND
330
Lys 12 (vol. scaling factor, 253)
553
ND
ND
ND
553
Averse (n=6)
249
ND
ND
6.6
256
Step 2
% Contaminant Removal
96.6%
100%
100%
86.3%
96.6%
Overall Percent Contaminant Removal
97.6%
100%
100%
99.9%
99.6%
Figure 6 - Contaminant Removal Efficiency

SEABOARD GROUP II AND THE CITY OF HIGH POINT
February 25, 2019
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Quarterly Remedial Action Progress Report, 4th Quarter 2018
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point (Parties) are providing this 4th Quarter 2018
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility and
closed Riverdale Drive Landfill located in Jamestown, NC (Site).
During the fourth quarter of 2018, the mechanical and phytoremediation treatment systems
processed 2,250,383 gallons of extracted groundwater and leachate. Also during the fourth
quarter of 2018, the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
October 12, 2018
2.5 days
Power loss due to Hurricane Michael
October 18, 2018
3.5 days
Communication issue at LS-1
October 26, 2018
2.5 days
Communication issue at LS-1
November 4, 2018
1.0 days
Power loss
November 10, 2018
2.0 days
Unknown — likely communication issue
December 4, 2018
8.0 days
Fiber optic cable replacement from LS-1
December 14, 2018
2.5 days
MV-420-A control valve fault
December 21, 2018
6.0 days
Unknown — likely communication issue
December 28, 2018
3.0 days
Unknown — likely communication issue
When Hurricane Michael moved through the area in mid -October, the storm resulted in damage
to communication components which are still impacting system operations. The fiber optics
cable which provides communications from LS-1 to the primary treatment building was replaced
during the shutdown in early December 2018. Further modifications to upgrade and streamline
the control systems are currently under evaluation.

The attached tables provide the results of the full scale operation of the treatment system during
the fourth quarter of 2018, including: Operating Data, Process Flow Data, Static Water Level
Data, System Chemistry, Utility Data Use, and Contaminant Removal Efficiency.
Summary
The effects of Hurricane Michael resulted in damage to several communication system
components. The fiber optic cable from LS-1 to the treatment building has been replaced. In
addition, hardware and software modifications are being evaluated to further reduce or eliminate
future communication issues.
Please contact Mr. Gary D. Babb, P.G. (919/605-4719) or Craig Coslett (610/435-1151) if there
are any questions or comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
Gary D. Babb, P.G.
President
Cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q4 2018
Quarterly
Units of
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
LEACHATE (GALLONS)
5,387,950
5,517,241
5,597,960
5,651,869
5,741,438
5,868,337
5,981,636
6,111,751
6,222,812
6,366,139
6,366,139
6,408,414
6,428,910
6,432,923
1,044,973
GALLONS
LSl-RWs (GALLONS)
1,343,837
1,383,154
1,406,190
1,423,891
1,452,514
1,482,607
1 1,510,090
1,514,294
1,543,309
1 1,556,670
1,556,670
1,566,566
1 1,568,477
1,568,851
225,014
GALLONS
PWDR1(GALLONS)
7,724,977
7,825,435
7,882,912
7,939,181
7,999,585
8,092,581
8,165,750
8,264,184
8,378,468
8,496,736
8,496,736
8,520,178
8,537,090
8,540,402
815,425
GALLONS
SIS-RWs (GALLONS)
762,277
778,216
786,445
790,127
793,908
813,266
827,993
843,969
868,694
892,658
892,658
898,294
901,721
902,392
140,115
GALLONS
PHYTO DISCH. (GALLONS)
5,799,891
6,087,773
6,256,190
6,391,693
6,573,691
6,846,560
7,075,460
7,323,831
7,612,489
7,915,410
7,915,410
7,998,475
8,041,793
8,050,274
2,250,383
GALLONS
AIR STRIP. RUNTIME (HRS)
9,490
9,621
9,700
9,771
9,863
9,981
397
523
675
837
837
869
892
915
1,122
51.4%
LSl COMP RUN (HOURS)
10,470
10,600
10,690
10,760
10,860
10,980
11,080
11,210
11,360
11,530
11,530
11,530
11,530
11,530
1,060
HOURS
LSl COMP LOAD (HOURS)
1,020
1,051
1,069
1,079
1,095
1,120
1,137
1,151
1,169
1,198
1,198
1,198
1,198
1,198
178
HOURS
LS2 COMP RUN (HOURS)
10,500
10,620
10,690
10,740
10,830
10,930
11,010
11,080
11,220
11,370
11,370
11,400
11,421
11,426
926
HOURS
LS2 COMP LOAD (HOURS)
1,136
1,144
1,148
1,151
1,153
1,163
1,171
1,178
1,191
1,205
1,205
1,208
1,210
1,210
74
HOURS
ELECT. UPPER (kW-Hr)
9,797
9,829
9,860
9,898
9,956
10,020
10,086
10,171
10,261
10,349
10,428
10,506
10,519
10,521
724
KW-HR
WATER METER (CF)
410,121
410,475
410,715
410,753
410,796
411,004
411,082
411,278
411,393
411,644
411,862
412,080
412,116
412,123
7,786
GALLONS
BACKWASH PUMP (GAL.)
203,858
205,687
206,599
206,599
206,599
207,516
207,516
208,426
208,426
209,338
209,338
210,246
210,376
210,402
1,976
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
547,641
567,951
579,932
589,422
602,078
622,346
639,916
659,042
681,952
704,799
704,799
711,206
714,473
715,113
167,472
GALLONS
ZONE 2
513,761
533,441
545,056
554,429
566,768
587,066
604,428
623,165
645,249
667,410
667,410
673,741
676,910
677,531
163,770
GALLONS
ZONE 3
534,813
555,483
567,883
576,226
589,314
610,946
629,528
648,619
670,970
692,461
692,461
698,503
701,576
702,178
167,365
GALLONS
ZONE
525,054
543,451
554,500
563,191
574,465
592,553
608,671
625,693
645,317
664,704
664,704
669,144
671,916
672,459
147,405
GALLONS
ZONE 5
565,108
585,004
597,294
607,028
619,147
640,044
658,193
677,564
700,203
722,350
722,350
727,594
730,761
731,381
166,273
GALLONS
ZONE 6
563,410
583,449
595,226
605,974
617,497
638,989
657,616
676,970
700,448
723,086
723,086
728,533
731,770
732,404
168,994
GALLONS
ZONE 7
546,701
567,938
579,520
589,236
602,636
624,207
641,794
662,290
684,600
707,365
707,365
713,382
716,637
717,275
170,574
GALLONS
ZONE 8
578,222
599,256
611,049
621,238
635,450
657,047
675,335
696,667
720,529
744,218
744,218
750,565
753,953
754,616
176,394
GALLONS
ZONE 9
557,001
578,195
589,744
599,723
612,889
634,401
652,870
673,670
696,749
720,386
720,386
725,840
729,220
729,882
172,881
GALLONS
ZONE 10
591,590
613,331
625,497
635,938
649,480
671,844
691,170
712,917
735,441
759,790
759,790
766,411
769,893
770,575
178,985
GALLONS
ZONE 11
224,524
233,548
239,951
245,298
250,579
260,323
269,372
279,060
290,446
302,341
302,341
305,488
307,189
307,522
82,998
GALLONS
ZONE 12
459,442
479,868
491,343
500,841
513,577
534,129
552,110
571,985
594,359
616,484
616,484
622,704
625,868
626,487
167,045
GALLONS
ZONE 13
387,845
407,923
415,011
424,212
436,097
453,590
464,904
477,081
490,976
505,747
505,747
508,981
511,093
511,507
123,662
GALLONS
ZONE 14
502,770
520,080
531,012
539,689
551,162
551,162
551,162
551,162
551,162
563,320
563,320
567,499
569,238
569,578
66,808
GALLONS
ZONE 15
283,514
283,514
290,735
290,735
290,735
290,735
290,735
290,735
290,735
290,735
290,735
291,675
291,675
291,675
8,161
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
78%
47%
42%
55%
70%
67%
75%
91%
96%
0%
19%
14%
3%
51%
%
AVERAGE FLOW (GPM)
28.6
16.7
13.4
18.1
27.1
22.7
24.6
28.6
30.1
0.0
8.2
4.3
0.8
17.2
GPM
EFF. DISCH. (GALLONS)
41,126
24,060
19,358
26,000
38,981
32,700
35,482
41,237
43,274
-
11,866
6,188
1,212
24,729
GPD
TOTAL INFLUENT (GALLONS)
40,715
24,209
18,794
26,054
38,478
32,668
35,533
39,869
42,703
-
11,607
6,107
1,196
24,456
GPD
INF. LEACHATE (GALLONS)
18,470
11,531
7,701
12,796
18,128
16,186
18,588
15,866
20,475
-
6,039
2,928
573
11,483
GPD
INF. LS1-RWs (GALLONS)
5,617
3,291
2,529
4,089
4,299
3,926
601
4,145
1,909
-
1,414
273
53
2,473
GPD
INF. PWDR) (GALLONS)
14,351
8,211
8,038
8,629
13,285
10,453
14,062
16,326
16,895
-
3,349
2,416
473
8,961
GPD
INF. SIS-RWs (GALLONS)
2,277
1,176
526
540
2,765
2,104
2,282
3,532
3,423
-
805
490
96
1,540
GPD
WEEKLY RUNTIME (DAYS)
5.5
3.3
2.9
3.9
4.9
4.7
5.2
6.3
6.7
-
1.4
1.0
0.2
3.5
DAYS/WK
LSl COMP RUN (HOURS)
18.6
12.9
10.0
14.3
17.1
14.3
18.6
21.4
24.3
-
3.5
0.7
12.0
HRS/DAY
LSl COMP LOAD (HOURS)
4.4
2.6
1.4
2.3
3.6
2.4
2.0
2.6
4.1
-
0.6
0.1
2.0
HRS/DAY
LS2 COMP RUN (HOURS)
17.1
10.0
7.1
12.9
14.3
11.4
10.0
20.0
21.4
4.3
3.1
0.6
10.2
HRS/DAY
LS2 COMP LOAD (HOURS)
1.1
0.6
0.4
0.3
1.4
1.1
1.0
1.9
2.0
0.4
0.3
0.1
0.8
HRS/DAY
ELECTRICITY(kW-Hr)
4.6
4.4
5.4
8.3
9.1
9.4
12.1
12.9
12.6
11.2
11.2
1.8
0.4
8.0
kW-HR/DAY
CITY WATER (GALLONS)
50.6
34.3
5.4
6.1
30
11
28
16
36
31
31
5
1
22
GPD
BACKWASH PUMP (GAL.)
261.3
130.3
131
130
130
-
130
19
4
72
GPD
EFFLUENT LABS
Fe (mg/L)
0.93
0.63
5.26
1.07
0.45
1.42
2.76
2.05
1.8
1.7
1.59
1.9
mg/L
pH
6.5
6.45
6.49
7.1
6.96
6.75
6.72
7.01
6.9
6.53
7.07
6.8
m/L
ORP
179
60
174
125
57
67
49
104
55
63
78
83
mV
COND
1,109
1,142
1162
1288
1251
1114
1220
1,177
1,061
1,122
1,262
1,180
US/cm
TDS (mg/L)
771.2
789.6
815.6
913.6
883.6
780.7
861.2
832
745
788
895
830
mg/L
TSS (mg/L)
11
6
16
0
0
6
23
7
14
7.2
mg/L
COD (mg/L)
68
78
78
90
79
69
107
85
68
79
116
85
mg/L
WELL LEVELS
Avera
Change
OWDR-4
682.16
676.19
678.91
677.20
677.54
678.38
680.83
676.64
677.34
677.12
678.27
677.8
(7.08)
OWDR-2
681.90
675.83
678.51
676.92
677.21
678.05
680.56
676.28
677.01
676.77
678.04
677.5
(9.25)
PWDR-1
689.23
658.87
658.72
662.72
662.57
661.72
669.02
657.79
659.28
658.98
660.83
661.1
(33.70)
OWDR-3
681.80
681.67
682.02
681.72
682.70
682.83
682.83
683.30
682.4
(0.54)
PW-6D (696.79)
680.37
#DIV/O!
OWLFS-2
680.00
#DIV/O!
PW-16D
680.52
678.86
680.67
679.8
(3.69)
PW-15D
683.12
681.80
683.62
682.7
ESTIMATED LAKE LEVEL
682.3
682.3
682.3
682.3
682.3
682.7
685.0
682.4
682.4
682.3
682.4
683.0
682.50
682.55
682.6
SOURCE WATER
PWDR-1
YES
YES
YES
YES
YES
YE5
YES
YES
YES
YES
no
YES
YES
no
LEACHATE (LCHT)
YES
YE5
YES
YES
YES
YES
YES
YES
YES
YES
no
YES
YES
no
LS-1 RECOVERY WELLS
YES
YES
YES
YES
YES
YES
YES
YES
YESI
YESI
no
YES
YES
no
SIS RECOVERY WELLS
IYES
IYE5
YESI
YES
YES
YESI
YES
YES
YESI
YESI
no
YES
YES
no
Figure 1 - Operating Data

50000
45000
40000
35000
fA
z
O
J
a 30000
O
J
LL 25000
J_
Q
W
a 20000
W
a
15000
10000
5000
0
SEABOARD Q4 2018
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
8
7
31
5
--*---INF. LEACHATE (GALLONS)
fINF. LS1-RWs (GALLONS)
4
INF. PWDR1 (GALLONS)
--)-(—IN F. SIS-RWs (GALLONS)
3 — EFF. DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
N
1
0
Figure 2 - Process Flow Data

695.00
685.00
,, 680.00
J
W
W
J
J
J
W
3: 675.00
670.00
665.00
SEABOARD Q4 2018
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
OWDR-4
OWDR-2
PWDR-1
-0-OWDR-3
--I-PW-6D (696.79)
-4--OWLFS-2
PW-16D
PW-15D
ESTIMATED LAKE LEVEL
Figure 3 - Static Water Level Data

N
°
O
,°�'
25
20
15
10
5
0
SEABOARD Q4 2018
1,400
1,200
1,000
800
600
400
200
-
o
o
z
O
U
w
O
Fe (mg/L)
pH
TSS (mg/L)
-->�—ORP
�� CO N D
-TDS (mg/L)
COD (mg/L)
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
Figure 4 - System Chemistry

0111j,
25.0
vn 20.0
W
a
W
a
J
0 15.0
O
Ln
W
cr
a
5
O
u 10.0
4711
SEABOARD Q4 2018
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
14.0
12.0
z
O
a
6.0 N
z
O
U
W
4.0 a
I►.1 t
LS1 COMP RUN (HOURS)
LS1 COMP LOAD (HOURS)
LS2 COMP RUN (HOURS)
LS2 COMP LOAD (HOURS)
ELECTRICITY (kW-Hr)
Figure 5 - Utility Use Data

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Influent
5.9
15.3
7.7
8.8
37.7
Mechanical
Effluent
6.7
0.23
0.12
0.31
7.36
Treatment
System
% Contaminant Removal
<
98.5
98.4
96.5
80.5
Irrigation water
6,700
230
120
310
7,360
Drainage water*
410
ND
ND
ND
410
Lys 2 (vol. scaling factor, 232)
Lys 7 (vol. scaling factor, 244)
685
ND
ND
ND
685
Step 2
Lys 8 (vol. scaling factor, 332)
37
ND
ND
ND
37
Phytoremediation
Lys 10 (vol. scalingfactor,306)
498
ND
ND
ND
498
System
Lys 11B (vol. scaling factor, 675)
2,303
ND
ND
ND
2,303
Lys 12 (vol. scaling factor, 155)
651
ND
ND
ND
651
Lys 13 (vol. scaling factor, 242)
2,929
ND
ND
15.2
2,944
Averse (n=7)
1,073
ND
ND
Z2
1,075
Step 2
% Contaminant Removal
84.0%
100%
100%
99.3%
85.3%
Overall Percent Contaminant Removal
81.8%
100%
100%
99.97%
97.1%
1 Apparent variations in the influent and effluent mass are a result of variations related to residence time through the mechanical treatment system. Averages
calculated from a greater number of samples show that influent and effluent mass are essentially equal, as expected.
Figure 6 - Contaminant Removal Efficiency

SEABOARD GROUP II AND THE CITY OF HIGH POINT
May 23, 2019
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Quarterly Remedial Action Progress Report, 1st Quarter 2019
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point (Parties) are providing this 1 st Quarter 2019
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility and the
closed Riverdale Drive Landfill located in Jamestown, NC (Site).
During the first quarter of 2019 the mechanical and phytoremediation treatment systems
processed 3,096,949 gallons of extracted groundwater and leachate. Also during the first quarter
of 2019 the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
January 3, 2019
4.0
Replace several Profibus connectors
January 10, 2019
1.0
Profibus communication issue at LS-2
January 11, 2019
5.0
Communication issue at LS-2, reprogram valve
January 21, 2019
4.0
Profibus communication issue at LS-2
February 4, 2019
1.5
Communication failure at FCV-399-4
Febrwa 6, 2019
1.0
LS-1 force main clogged
February 19, 2019
7.5
Lime pump failed, replaced VFD and motor
February 26, 2019
1.0
Communication loss, restarted system
Several Operation and Maintenance (O&M) activities are currently in the planning and design
stage to improve the operation of the treatment system and overall condition of the Site. These
O&M activities include the following:
Update the PLC/HMI control system to optimize the groundwater/leachate extraction and
treatment system operations. This update will include the installation of new hardware,
wiring of new equipment, and installation of new programmable control logic. During
this update, the PhotoCat equipment and controllers will be completely removed from the
treatment system enclosure and recycled.
• Perform maintenance activities at the former Seaboard Chemical property to address
minor security and safety concerns identified during a recent self -audit.

The attached tables provide the results of the full scale operation of the treatment system during
the first quarter of 2019, including: Operating Data, Process Flow Data, Static Water Level Data,
System Chemistry, Utility Data Use, and Contaminant Removal Efficiency.
Summary
Several O&M activities are in the planning and design stage as discussed above. The PLC/HMI
control system update and the former Seaboard Chemical O&M activities will be implemented
during the 2nd and 3rd quarters of 2019.
Please contact Mr. Gary D. Babb, P.G. (919/605-4719) or Craig Coslett (610/435-1151) if there
are any questions or comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
Gary D. Babb, P.G.
President
cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q4 2018
Quarterly
Units of
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK9
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
�
N
ti
\
ti
ti
ti
ti
N
ti
N
ti
ti
\
LEACHATE (GALLONS)
6,432,923
6,432,923
6,510,491
6,607,450
6,684,766
6,808,600
6,894,062
7,041,058
7,041,058
7,201,187
7,368,984
7,541,599
7,716,269
7,860,234
1,427,311
GALLONS
LSl-RWs (GALLONS)
1,568,851
1,568,851
1,592,403
1,621,843
1,645,318
1,681,822
1,711,667
1,739,197
1,739,197
1,749,724
1,759,236
1,770,501
1,781,106
1,787,802
218,951
IGALLONS
PWDR1(GALLONS)
8,540,402
8,540,402
8,607,718
8,691,863
8,758,960
8,889,780
8,979,784
9,132,884
9,132,884
9,237,202
9,353,432
9,478,894
9,604,336
9,726,594
1,186,192
GALLONS
SIS-RWs (GALLONS)
902,392
902,392
915,323
931,488
944,377
967,906
984,310
1,011,576
1,011,576
1,030,967
1,053,545
1,076,556
1,099,670
1,120,369
217,977
GALLONS
PHYTO DISCH. (GALLONS)
8,050,274
8,050,274
8,236,087
8,468,353
8,653,562
8,971,426
9,195,090
9,557,626
9,557,626
9,854,814
10,180,692
10,523,120
10,856,242
11,147,223
3,096,949
GALLONS
AIR STRIP. RUNTIME (HRS)
915
915
988
1,079
1,152
1,313
589
779
779
905
1,050
1,208
1,371
1,532
1,449 (66.3%)
HOURS
LSl COMP RUN (HOURS)
22
49
71
238
356
567
567
714
866
1,031
1,200
1,368
1,368
HOURS
LSl COMP LOAD (HOURS)
7
17
24
102
182
320
320
405
504
609
718
819
819
HOURS
LS2 COMP RUN (HOURS)
11,426
11,426
11,489
11,567
11,630
11,780
11,890
12,070
12,070
12,170
12,310
12,460
12,610
12,770
1,344
HOURS
LS2 COMP LOAD (HOURS)
1,210
1,210
1,217
1,225
1,232
1,246
1,255
1,270
1,270
1,280
1,293
1,305
1,318
1,330
120
HOURS
ELECT. UPPER (kW-Hr)
10,521
10,521
10,657
10,826
10,961
11,056
11,125
11,241
11,294
11,378
11,471
11,548
11,632
11,702
1,181
KW-HR
WATER METER (CF)
412,123
412,123
412,240
412,387
412,504
412,600
412,674
412,888
412,888
413,168
413,560
413,760
414,000
414,074
14,594
GALLONS
BACKWASH PUMP (GAL.)
210,402
210,402
210,635
210,927
211,160
211,160
211,164
211,164
211,164
212,102
213,012
213,926
214,837
214,837
4,435
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
715,113
715,113
727,444
742,857
755,148
775,949
791,049
814,815
814,815
833,533
853,979
876,228
897,785
915,423
200,310
GALLONS
ZONE 2
677,531
677,531
689,356
704,137
715,924
735,986
750,452
772,922
772,922
792,069
812,776
834,399
855,404
873,164
195,633
GALLONS
ZONE 3
702,178
702,178
715,453
732,046
745,278
767,648
782,476
807,124
807,124
826,374
848,216
870,755
891,820
909,040
206,862
GALLONS
ZONE
672,459
672,459
683,494
697,287
708,286
727,053
739,533
759,992
759,992
776,528
795,918
815,684
834,367
849,815
177,356
GALLONS
ZONE 5
731,381
731,381
744,061
759,912
772,551
793,096
807,533
830,914
830,914
850,244
872,103
895,151
917,551
934,977
203,596
GALLONS
ZONE 6
732,404
732,404
745,766
762,468
775,786
797,912
812,777
837,080
837,080
857,032
879,755
903,614
926,374
944,289
211,885
GALLONS
ZONE 7
717,275
717,275
730,118
746,172
758,974
780,750
795,458
819,335
819,335
838,272
860,681
883,954
909,083
927,139
209,864
GALLONS
ZONE 8
754,616
754,616
764,744
777,405
787,500
819,816
835,036
589,342
589,342
880,475
902,656
926,757
951,764
970,200
215,584
GALLONS
ZONE 9
729,882
729,882
742,156
757,499
769,733
791,823
806,519
831,311
831,311
851,030
872,417
895,990
918,669
936,651
206,769
GALLONS
ZONE 10
770,575
770,575
784,693
802,341
816,414
840,214
855,601
881,923
881,923
902,882
926,646
951,605
975,917
995,671
225,096
GALLONS
ZONE 11
307,522
307,522
313,531
321,042
327,032
337,995
344,592
355,725
355,725
365,787
376,660
388,132
400,456
410,399
102,877
GALLONS
ZONE 12
626,487
626,487
638,956
654,542
666,970
689,512
703,449
727,324
727,324
748,258
771,012
794,948
818,200
836,396
209,909
GALLONS
ZONE 13
511,507
511,507
520,845
532,517
541,824
553,978
566,350
587,592
587,592
605,317
618,630
631,967
645,438
662,877
151,370
GALLONS
ZONE 14
569,578
569,578
578,970
590,710
600,072
612,710
624,881
641,602
641,602
653,769
667,037
681,311
695,061
711,821
142,243
GALLONS
ZONE 15
291,675
291,675
298,244
306,455
313,003
323,955
333,450
348,384
348,384
361,220
375,189
390,505
405,548
423,740
132,065
GALLONS
Zone 16
2,564
5,770
8,326
21,792
30,583
46,455
46,455
59,842
75,024
90,520
105,827
124,055
124,055
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
0%
43%
54%
43%
96%
65%
87%
0%
75%
86%
95%
97%
96%
64%
%
AVERAGE FLOW (GPM)
0.0
18.4
23.0
18.4
31.5
22.2
31.5
0.0
29.5
32.3
34.0
33.0
28.9
23.3
GPM
EFF. DISCH. (GALLONS)
26,545
33,181
26,458
45,409
31,952
45,317
42,455
46,554
48,918
47,589
41,569
33,534
GPD
TOTAL INFLUENT (GALLONS)
25,910
32,387
25,825
44,955
31,674
44,362
-
42,052
45,160
47,479
47,690
41,945
33,034
GPD
INF. LEACHATE (GALLONS)
11,081
13,851
11,045
17,691
12,209
18,375
-
22,876
23,971
24,659
24,953
20,566
15,483
GPD
INF. LS1-RWs (GALLONS)
3,365
4,206
3,354
5,215
4,264
3,441
-
1,504
1,359
1,609
1,515
957
2,368
GPD
INF. PWDR) (GALLONS)
9,617
12,021
9,585
18,689
12,858
19,138
-
14,903
16,604
17,923
1 17,920
17,465
12,825
GPD
INF. SIS-RWs (GALLONS)
1,847
2,309
1,841
3,361
2,343
3,408
-
2,770
3,225
3,287
3,302
2,957
2,358
GPD
WEEKLY RUNTIME (DAYS)
3.0
3.8
3.0
6.7
4.5
6.9
-
5.2
6.0
6.6
6.8
6.7
4.6
DAYS/WK
LSl COMP RUN (HOURS)
3.1
3.9
3.1
23.9
16.9
26.4
-
21.0
21.7
23.6
24.1
24.0
14.7
HRS/DAY
LSl COMP LOAD (HOURS)
1.1
1.3
1.1
11.1
11.4
17.3
-
12.1
14.1
15.0
15.6
14.4
8.8
HRS/DAY
LS2 COMP RUN (HOURS)
9.0
11.2
9.0
21.4
15.7
22.5
-
14.3
20.0
21.4
21.4
22.9
14.5
HRS/DAY
LS2 COMP LOAD (HOURS)
1.0
1.2
0.9
2.0
1.3
1.9
1.4
1.9
1.7
1.9
1.7
1.3
HRS/DAY
ELECTRICITY(kW-Hr)
19.4
24.2
19.3
13.6
9.9
14.5
8.8
12.0
13.3
11.0
12.0
10.0
12.9
kW-HR/DAY
CITY WATER (GALLONS)
17.0
21.0
17.0
14
11
27
40
56
29
34
11
158
GPD
BACKWASH PUMP (GAL.)
-
33.0
42.0
33.0
1
-
134
130
131
130
49
GPD
EFFLUENT LABS
Fe (mg/L)
0.93
3
0.39
0.55
0.62
0.7
0.5
1.78
0.64
0.31
0.9
mg/L
pH
6.5
6.69
6.45
6.69
6.06
6.46
6.49
6.35
6.34
6.20
6.4
m/L
ORP
179
225
113
132
148
59
47
46
40
57
96
mV
COND
1,109
1727
1243
1223
1,062
1,118
1,170
1,213
1,221
1,032
1,223
uS/cm
TDS(mg/L)
771
1243
885
867.5
750
791
829
860
863
727
868
mg/L
TSS (mg/L)
11
0
1
4
2
6
0
3
5
2.3
mg/L
COD (mg/L)
68
146
105
87
52
70
83
92
84
58
86
mg/L
WELL LEVELS
I
Average
Change
OWDR-4
682.16
676.35
676.16
676.11
677.19
676.70
676.58
676.73
676.62
676.6
(5.61)
OWDR-2
681.90
675.88
675.78
675.72
676.80
676.32
676.20
676.35
676.23
676.2
(5.74)
PWDR-1
689.23
657.34
655.53
655.64
655.94
655.54
655.76
657.10
657.35
656.3
(32.95)
OWDR-3
681.80
683.01
682.34
683.44
682.81
682.72
682.46
682.8
1.00
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
682.40
682.02
683.41
682.26
682.31
681.94
682.4
(0.73)
ESTIMATED LAKE LEVEL
682.6
682.5
682.8
682.5
682.4
682.4
682.4
682.4
682.4
682.4
682.4
682.4
682.40
682.40
682.4
SOURCE WATER
PWDR-1
NO
NO
YES
YES
YES
YES
YES
YES
No
YES
YES
YES
YES
YES
LEACHATE (LCHT)
NO
NO
YES
YES
YES
YES
YES
YES
NO
YES
YES
YES
YES
YES
LS-1 RECOVERY WELLS
IND
NO
YES
YES
YES
YES
YES
YES
NO
YES
YES
YES
YES
YES
SIS RECOVERY WELLS
IND
NO
YES
YES
YES
YES
YES
YES
NO
YES
YESI
YESI
YES
YES

50000
z 40000
O
J
J
Q
O
J
LL 30000
J_
Q
W
a
W
a 20000
10000
0
SEABOARD Q1 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
8
31
5
--*---INF. LEACHATE (GALLONS)
fINF. LS1-RWs (GALLONS)
4
INF. PWDR1 (GALLONS)
--)-(—IN F. SIS-RWs (GALLONS)
3 — EFF. DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
N
1
0
FIGURE 2 - PROCESSS FLOW DATA

695.00
685.00
680.00
J
W
W
J
J
J
W
3: 675.00
670.00
665.00
SEABOARD Q1 2019
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
tOWDR-4
fOWDR-2
fPWDR-1
--X-OWDR-3
--I- PW-6D (696.79)
-4--OWLFS-2
PW-16D
PW-15D
ESTIMATED LAKE LEVEL
FIGURE 3 - STATIC WATER LEVEL DATA

8
7
5lot
H
° 4
�
LL
3
2
1
0
SEABOARD Q1 2019
2,000
1,800
1,600
1,400
1,200 0 Fe (mg/L)
U
o pH
1,000 o TSS (mg/L)
O --0(—ORP
U
800 0 �� CO N D
-TDS (mg/L)
600 COD (mg/L)
400
200
-
—
Ar
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
FIGURE 4 - SYSTEM CHEMISTRY

0111]
25.0
vn 20.0
W
a
W
a
J
0 15.0
O
Ln
W
cr
a
5
O
u 10.0
all
SEABOARD Q1 2019
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
alM
25.0
at
LS1 COMP RUN (HOURS)
LS1 COMP LOAD (HOURS)
LS2 COMP RUN (HOURS)
LS2 COMP LOAD (HOURS)
ELECTRICITY (kW-Hr)
FIGURE 5 - UTILITY USE DATA

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Influent
9.3
31.6
16.6
18.9
76.3
Mechanical
Effluent'
10.28
0.37
0.20
0.59
11.4
Treatment
System
% Contaminant Removal
<
98. 8 %
98.8 %
96. 9 %
85. 0
Irrigation water
9
9
10,280
370
200
590
11,400
Drainage water*
2,300
ND
ND
ND
2,300
Lys 2 (voL scalingfactor, 258)
Lys 7 (voL scalingfactor, 340)
1,374
ND
ND
91
1,465
Step 2
Lys 8 (voL scalingfactor, 388)
59
ND
ND
125
184
Phyto ation
Lys 10 (voL scalingfactor, 368)
1,741
ND
ND
ND
1,741
Syystemstem
Lys 11B (voL scalingfactor, 686)
781
ND
ND
ND
781
Lys 12 (voL scalingfactor, 214)
1,303
ND
ND
16.6
1,320
Lys 13 (voL scalingfactor, 221)
1,156
ND
ND
ND
1,156
Averse (n=7)
1,245
ND
ND
33.2
1,278
Step 2
% Contaminant Removal
87 9%
100%
100%
94.4%
88.8%
Overall Percent Contaminant Removal
86.6%
100%
100%
99.8%
98.3%
1 Apparent variations in the influent and effluent mass are a result of variations related to residence time through the mechanical treatment system. Averages
calculated from a greater number of samples show that influent and effluent mass are essentially equal, as expected.
FIGURE 6 - CONTAMINANT REMOVAL EFFICIENCY

SEABOARD GROUP II AND THE CITY OF HIGH POINT
August 9, 2019
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Remedial Action Progress Report, 2019 Second Quarter
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point (Parties) are providing this 2019 Second Quarter Remedial
Action Progress Report for the former Seaboard Chemical Corporation facility and the closed Riverdale Drive
Landfill located in Jamestown, NC (Site).
During the second quarter of 2019 the mechanical and phytoremediation treatment systems processed 2,948,603
gallons of extracted groundwater and leachate. Also during the second quarter of 2019 the following shutdowns
exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
April 12, 2018
2.5
Automatic, heavy rains, too much flow
April 17, 2019
1.0
Automatic, system component malfunction*
April 19, 2019
2.5
Automatic, power loss
May 3, 2019
2.0
Automatic, tripped breaker, lost compressor
May 18, 2019
2.0
Automatic, system component malfunction*
May 24, 2019
3.5
Automatic, system component malfunction*
June 2, 2019
1.2
Automatic, system component malfunction*
June 29, 2019
2.0
Automatic, power loss
* Shutdowns caused by system component malfunctions were a result of compounding factors and not a
specific upset to the system For example, some of the shutdowns appear to be loss of air supply at the LS-
1 compressor due to a combination of locked up pneumatic pumps, leaking supply valves, and stuck
regulators. Regulators have been repaired, pumps have been serviced (some are scheduled for
replacement), and valves have been ordered. Another system component malfunction caused shutdown
may be due to a bad temperature sensor in the east lobe that registered freezing conditions and because of
stuck zone valves was not able to direct flow to another zone. The replacement senor has been installed
and replacement solenoids have been ordered.
Several Operation and Maintenance (O&M) activities have been completed or are currently underway to improve
the operation of the treatment system and overall condition of the Site. These O&M activities include the following:

• Update the PLC/HMI control system to optimize the groundwater/leachate extraction and treatment system
operations. This update is currently underway and includes the installation of new hardware, wiring of new
equipment, and installation of new programmable control logic.
• The removal and recycling of the PhotoCat equipment and controllers from the treatment system enclosure
is also currently underway at this time.
• Maintenance activities at the former Seaboard Chemical property to address minor security and safety
concerns identified during a recent self -audit have been completed.
The attached tables provide the results of the full scale operation of the treatment system during the second quarter
of 2019, including: Operating Data, Process Flow Data, Static Water Level Data, System Chemistry, Utility Data
Use, and Contaminant Removal Efficiency.
Summary
Several O&M activities are in process or have been completed as described above. The PLC/HMI control system
update and recycling of the PhotoCat equipment are scheduled to be completed during the third quarter of 2019.
Note that during final installation the system will be shut down. We anticipate that it will take two to three weeks to
fully install and test the new PLC/HMI system update.
Please contact Mr. Gary D. Babb, P.G. (919/605-4719) or Craig Coslett (610/435-1151) if there are any questions or
comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
Communications via electronic mail should be directed to [e-mail] and [e-mail].
Respectfully,
Seaboard Group II and City of High Point
Gary D. Babb, P.G.
President
cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q4 2018
Quarterly
Units of
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK9
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
LEACHATE (GALLONS)
7,860,234
8,002,834
8,111,531
8,183,640
8,321,757
8,424,938
8,521,842
8,608,318
8,675,704
8,751,996
8,805,954
8,963,998
9,064,664
9,126,448
1,266,214
GALLONS
LSl-RWs (GALLONS)
1,787,802
1,798,536
1,829,077
1,847,722
1,890,736
1,923,731
1,950,239
1,978,198
2,000,951
2,029,428
2,047,866
2,088,650
2,122,584
2,150,198
362,396
GALLONS
PWDR1(GALLONS)
9,726,594
9,842,466
9,910,256
9,968,732
10,094,732
10,211,697
10,285,993
10,363,761
10,424,441
10,517,480
10,586,303
10,699,335
10,797,211
10,862,631
1,136,037
GALLONS
SIS-RWs(GALLONS)
1,120,369
1,139,819
1,152,868
1,157,168
1,180,125
1,199,277
1,210,842
1,223,436
1,234,222
1,242,280
1,265,761
1,288,203
1,306,061
1,316,068
195,699
GALLONS
PHYTO DISCH. (GALLONS)
11,147,223
11,438,024
11,660,788
11,815,177
12,143,594
12,413,814
12,619,970
12,822,669
12,980,963
13,192,319
13,351,718
13,680,940
13,930,954
14,095,826
2,948,603
GALLONS
AIR STRIP. RUNTIME(HRS)
1,532
1,695
1,793
1,868
2,030
2,180
2,276
2,371
2,450
2,566
2,654
2,798
2,922
3,006
1,474(67.5%)
HOURS
LSl COMP RUN (HOURS)
1,368
1,536
1,646
1,768
1,937
2,102
2,250
2,387
2,505
2,639
2,783
2,945
3,098
3,224
1,856
HOURS
LSl COMP LOAD (HOURS)
819
938
1,014
1,065
1,190
1,317
1,400
1,482
1,552
1,658
1,741
1,882
2,001
2,071
1,252
HOURS
LS2 COMP RUN (HOURS)
12,770
12,910
13,010
13,030
13,190
13,330
13,420
13,500
13,580
13,650
13,700
13,820
13,910
13,980
1,210
HOURS
LS2 COMP LOAD (HOURS)
1,330
1,342
1,350
1,352
1,365
1,376
1,383
1,390
1,397
1,404
1,408
1,419
1,428
1,434
104
HOURS
ELECT. UPPER (kW-Hr)
11,702
11,771
11,812
11,849
11,895
11,932
11,958
11,987
12,013
12,040
12,063
12,098
12,129
12,154
452
KW-HR
WATER METER (CF)
414,074
414,427
414,749
414,996
415,217
415,436
415,608
415,665
415,852
416,055
416,238
416,459
416,559
416,815
20,503
GALLONS
BACKWASH PUMP (GAL.)
214,837
216,662
218,489
218,489
219,404
219,404
219,914
219,914
219,914
220,827
221,740
222,656
222,656
223,568
8,731
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
915,423
936,684
950,257
959,516
978,850
996,246
1,009,472
1,021,174
1,031,493
1,045,029
1,054,699
1,075,486
1,091,267
1,102,066
186,643
GALLONS
ZONE 2
873,164
889,435
903,125
912,342
931,274
947,784
960,282
971,342
981,029
992,966
1,001,429
1,021,475
1,036,309
1,045,829
172,665
GALLONS
ZONE 3
909,040
926,607
940,927
949,830
969,636
986,110
998,857
1,013,734
1,023,759
1,043,553
1,053,119
1,072,815
1,088,239
1,098,811
189,771
GALLONS
ZONE
849,815
865,934
878,292
886,782
904,331
919,542
935,208
956,420
955,236
966,075
974,574
992,413
1,005,594
1,015,052
165,237
GALLONS
ZONE 5
934,977
953,175
967,527
977,146
996,345
1,013,344
1,025,095
1,037,317
1,047,473
1,059,178
1,068,821
1,089,356
1,104,852
1,115,295
180,318
GALLONS
ZONE 6
944,289
961,679
976,136
985,331
1,006,479
1,023,769
1,035,076
1,048,378
1,057,829
1,070,670
1,080,489
1,101,068
1,116,968
1,127,823
183,534
GALLONS
ZONE 7
927,139
945,728
960,026
969,030
989,757
1,007,126
1,019,532
1,033,028
1,042,667
1,055,471
1,065,668
1,086,706
1,102,763
1,113,140
186,001
GALLONS
ZONE 8
970,200
989,102
1,002,570
1,012,499
1,033,923
1,051,320
1,062,891
1,076,328
1,086,814
1,098,981
1,109,697
1,130,877
1,146,883
1,156,980
186,780
GALLONS
ZONE 9
936,651
954,616
967,818
977,327
998,586
1,016,595
1,029,516
1,042,665
1,053,002
1,064,972
1,075,727
1,096,746
1,112,667
1,122,705
186,054
GALLONS
ZONE 10
995,671
1,014,309
1,028,522
1,038,838
1,060,517
1,077,893
1,090,418
1,103,452
1,114,542
1,127,727
1,139,330
1,161,150
1,176,803
1,187,108
191,437
GALLONS
ZONE 11
410,399
419,815
427,621
433,146
445,388
454,752
462,867
471,461
476,874
482,354
487,901
499,114
507,075
512,660
102,261
GALLONS
ZONE 12
836,396
853,727
866,319
876,025
896,880
913,126
926,643
937,691
947,208
961,239
971,295
991,459
1,006,742
1,016,862
180,466
GALLONS
ZONE 13
662,877
680,100
692,304
701,520
720,814
736,663
749,123
759,595
767,955
780,428
789,416
809,310
823,322
833,251
170,374
GALLONS
ZONE 14
711,821
727,564
739,223
748,184
767,823
783,427
795,569
805,706
814,489
825,522
834,568
853,938
867,984
877,933
166,112
GALLONS
ZONE 15
423,740
440,471
453,483
463,149
483,574
499,834
512,619
522,548
531,513
543,962
552,992
572,633
587,646
597,231
173,491
GALLONS
Zone 16
124,055
140,182
153,989
163,612
183,054
199,571
212,138
222,212
231,018
243,617
252,946
272,819
288,143
298,551
174,496
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
97%
59%
44%
97%
90%
57%
57%
36%
94%
52%
86%
74%
50%
69%
%
AVERAGE FLOW (GPM)
28.8
22.1
15.3
32.6
26.8
20.5
20.1
13.7
24.5
15.8
32.7
24.8
16.4
22.6
GPM
EFF. DISCH. (GALLONS)
41,543
31,823
22,056
46,917
38,603
29,451
28,957
19,787
35,226
22,771
47,032
35,716
23,553
32,572
GPD
TOTAL INFLUENT (GALLONS)
41,237
31,440
21,933
47,155
38,899
29,896
29,257
20,201
34,311
23,529
47,757
35,762
23,546
32,686
GPD
INF. LEACHATE (GALLONS)
20,371
15,528
10,301
19,731
14,740
13,843
12,354
8,423
12,715
7,708
22,578
14,381
8,826
13,962
GPD
INF. LS1-RWs (GALLONS)
1,533
4,363
2,664
6,145
4,714
3,787
3,994
2,844
4,746
2,634
5,826
4,848
3,945
4,003
GPD
INF. PWDR) (GALLONS)
16,553
9,684
8,354
18,000
16,709
10,614
11,110
7,585
15,507
9,832
16,147
13,982
9,346
12,571
GPD
INF. SIS-RWs (GALLONS)
2,779
1,864
614
3,280
2,736
1,652
1,799
1,348
1,343
3,354
3,206
2,551
1,430
2,150
GPD
WEEKLY RUNTIME (DAYS)
6.8
4.1
3.1
6.8
6.3
4.0
4.0
2.9
5.6
3.6
6.0
5.2
3.5
4.8
DAYS/WK
LSl COMP RUN (HOURS)
24.0
15.7
17.4
24.1
23.6
21.1
19.6
14.8
22.3
20.6
23.1
21.9
18.0
20.5
HRS/DAY
LSl COMP LOAD (HOURS)
17.0
10.9
7.3
17.9
18.1
11.9
11.7
8.8
17.7
11.9
20.1
17.0
10.0
13.9
HRS/DAY
LS2 COMP RUN (HOURS)
20.0
14.3
2.9
22.9
20.0
12.9
11.4
10.0
11.7
7.1
17.1
12.9
10.0
13.3
HRS/DAY
LS2 COMP LOAD (HOURS)
1.7
1.1
0.3
1.9
1.6
1.0
1.0
0.9
1.2
0.6
1.6
1.3
0.9
1.1
HRS/DAY
ELECTRICITY(kW-Hr)
9.9
5.9
5.3
6.6
5.3
3.7
4.1
3.3
4.5
3.3
5.0
4.4
3.6
5.0
kW-HR/DAY
CITY WATER (GALLONS)
50.0
46.0
35.0
32.0
31
25
8
23
34
26
32
14
37
226
GPD
BACKWASH PUMP (GAL.)
261.0
261.0
131.0
73
152
130
131
130
98
GPD
EFFLUENT LABS
Fe (mg/L)
0.31
0.39
0.49
0.67
0.54
0.8
1.31
1.09
2.0
0.8
1.43
0.54
0.28
1.41
0.9
mg/L
pH
6.2
6.47
6.64
6.65
6.29
6.77
6.69
6.89
6.8
6.45
6.46
6.69
6.33
6.40
6.6
m/L
ORP
57
65
41
20
64
83
21
32
0
45
5
11
28
4
32
mV
COND
1,032
1,162
1303
1347
1223
1779
1341
1,728
1,608
1,383
1,210
1,097
1,100
1,229
1,347
u5/cm
TDS(mg/L)
727
813
918.2
953.5
873.5
1270
940
1,227
1,132
968
842
760
761
848
947
mg/L
TSS (mg/L)
1
4
4
0
3
7
2
12
9
10
6
1
2
4.7
mg/L
COD (mg/L)
58
102
82
97
77
85
94
87
87
78
83
68
57
67
82
mg/L
WELL LEVELS
Average
Change
OWDR-4
682.16
676.97
678.17
678.33
667.36
676.15
677.60
677.76
677.56
677.67
679.69
677.73
676.14
677.74
676.8
(5.61)
OWDR-2
681.90
676.60
677.85
678.02
675.97
675.73
677.28
677.44
677.24
677.34
679.44
677.41
675.77
677.43
677.2
(5.74)
PWDR-1
689.23
657.64
658.64
658.99
656.61
656.05
657.85
658.20
658.00
657.78
659.64
657.93
656.45
658.01
657.8
(32.95)
OWDR-3
681.80
683.10
682.75
682.37
682.32
682.49
682.18
681.86
683.04
682.54
682.19
682.151682.6
1.00
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
682.23
683.70
683.53
681.94
681.76
682.80
682.79
682.43
682.42
684.42
682.37
681.81
682.62
(0.73)
ESTIMATED LAKE LEVEL
682.6
682.6
682.6
682.6
682.6
682.6
682.6
682.6
682.6
681.8
683.0
682.6
682.50
682.50
SOURCE WATER
PWDR-1
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
LEACHATE(LCHT)
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
LS-1 RECOVERY WELLS
YES
YES
YESI
YES
YES
YES
YES
YES
YES
YES
YES
YES
YESI
YES
SIS RECOVERY WELLS
YES
YES
YESI
YES
YES
YES
YES
YES
YES
YES
YES
YES
YESI
YES
FIGURE 1 - Operating Data

50000
45000
40000
35000
z
0
30000
0
25000
J
a
o
W
c7 20000
W
>
a
15000
10000
5000
0
SEABOARD Q2 2019
8
7
6
5
�INF. LEACHATE (GALLONS)
fINF. LS1-RWs (GALLONS)
4
fINF. PWDR1 (GALLONS)
--X—INF. SIS-RWs (GALLONS)
3 --I—EFF. DISCH. (GALLONS)
-4 WEEKLY RUNTIME (DAYS)
0
Ilk
AN
Ar-
IL
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
FIGURE 2 - Process Flow Data

685.00
675.00
665.00
655.00
SEABOARD Q2 2019
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
tOWDR-4
fOWDR-2
fPWDR-1
--X—OWDR-3
--I— PW-6D
—4--OWLFS-2
PW-16D
PW-15D
ESTIMATED LAKE LEVEL
FIGURE 3 - Static Water Level Data

N
Q'A
O
14
12
10
8
6Gro—o"
4
2
0
SEABOARD Q2 2019
2,000
1,800
1,600
1,400
1,200
1,000
800
600
400
200
-
0
U
o
o
z
Fe (mg/L)
pH
TSS (mg/L)
ORP
�I� CO N D
-TDS (mg/L)
COD (mg/L)
1 2 3 4 S 6 7 8 9 10 11 12 13
WEEK
FIGURE 4 - System Chemistry

0111]
25.0
vn 20.0
W
a
W
a
J
0 15.0
O
Ln
W
cr
a
5
O
u 10.0
all
SEABOARD Q2 2019
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
12.0
10.0
W
a
8.0 u;
a
J_
a
LS1 COMP RUN (HOURS)
z
6.0
LS1 COMP LOAD (HOURS)
a
g
_ LS2 COMP RUN (HOURS)
z
--X—LS2 COMP LOAD (HOURS)
O
-I--ELECTRICITY (kW-Hr)
4.0 �
O
a
FIGURE 5 - Utility Use Data

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Influent *
7.7
30.4
15.4
24.9
78.4
Mechanical
Effluent' * *
10.0
0.18
0.11
0.09
10.2
Treatment
System
% Contaminant Removal
<
99.4%
99.3%
99.6%
87.0%
Irrigation water
g
9
g
9
10,000
180
110
90
10,200
Drainage water*
2,613
ND
ND
ND
2,613
Lys 2 (vol. scaling factor, 259)
Lys 7 (vol. scaling factor, 334)
ND
ND
ND
ND
ND
Step 2
Lys 8 (vol. scaling factor, 384)
ND
ND
ND
ND
ND
Phytoremediation
Lys 10 (vol. scaling factor, 315)
889
ND
ND
ND
882
System
Lys 11B (vol. scaling factor, 680)
561
ND
ND
ND
560
Lys 12E (vol. scaling factor,189)
534
ND
ND
10.7
540
Lys 13E (vol. scaling factor, 227)
492
ND
ND
ND
493
Lys 15 (vol. scaling factor, 607)
26
ND
ND
17.5
44
Averse (n=8)
639
ND
ND
3.5
642
Step 2
% Contaminant Removal
93.6%
100%
100%
96.1 %
93.7%
Overall Percent Contaminant Removal
91.7%
100%
100%
99.98%
99.2%
*Influent: gal (including: LCHTs, 1,266,214 gal; LS1-RWs, 362,396 gal; PWDR-1, 1,136,037 gal; SIS-RWs, 195,699 gal; City
water (backwash and floc), 20,503. **Effluent: 2,948,603 gal.
1 Apparent variations in the influent and effluent mass are a result of variations related to residence time through the mechanical treatment
system. Averages calculated from a greater number of samples show that influent and effluent mass are essentially equal, as
expected.
FIGURE 6 - Contaminant Removal Efficiency

SEABOARD GROUP II AND THE CITY OF HIGH POINT
November 26, 2019
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Remedial Action Progress Report, 2019 Third Quarter
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point (Parties) are providing this 2019 Third
Quarter Remedial Action Progress Report for the former Seaboard Chemical Corporation facility
and the closed Riverdale Drive Landfill located in Jamestown, NC (Site).
During the third quarter of 2019 the mechanical and phytoremediation treatment systems
processed 3,490,936 gallons of extracted groundwater and leachate. Also during the third
quarter of 2019 the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
July 3, 2019
2.5 days
Air Loss — overloaded compressor
July 8, 2019
1.0 days
Faulty soil temperature sensor
July 19, 2019
2.5 days
Power loss
August 4, 2019
1.0 days
Bag filter malfunction due to lime line clog
August 11, 2019
1.5 days
LS-2 I/O communications issues
September 28, 2019
1.5 days
420 pump fault and code deficiency
The PLC/HMI control system update is underway and scheduled to be completed during the
fourth quarter of 2019. Note that during installation of the PLC/HMI controls update, the
treatment system has been shut down. We anticipate that it will take four to five weeks to fully
install and test the new PLC/HMI control system.
The attached tables provide the results of the full scale operation of the treatment system during
the third quarter of 2019, including: Operating Data, Process Flow Data, Static Water Level
Data, System Chemistry, Utility Data Use, and Contaminant Removal Efficiency.

Please contact Mr. Gary D. Babb, P.G. (919/605-4719) or Craig Coslett (610/435-1151) if there
are any questions or comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
r�
Gary D. Babb, P.G.
President
cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q3 2019
Quarterly
Units of
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
�
LEACHATE (GALLONS)
9,126,448
9,184,450
9,313,278
9,399,106
9,523,036
9,641,190
9,739,094
9,853,656
9,956,636
10,079,717
10,169,986
10,274,248
10,372,873
10,449,030
1,322,582
GALLONS
LSl-RWs (GALLONS)
2,150,198
2,180,780
2,235,754
2,271,965
2,335,181
2,391,031
2,446,306
2,513,637
2,561,844
2,625,054
2,666,065
2,699,406
2,744,310
2,774,312
624,114
GALLONS
PWDR1(GALLONS)
10,862,631
10,919,903
11,036,607
11,112,597
11,223,539
11,335,830
11,430,672
11,550,875
11,653,433
11,784,029
11,874,670
11,989,012
12,096,078
12,183,632
1,321,001
GALLONS
SIS-RWs(GALLONS)
1,316,068
1,327,230
1,344,842
1,356,636
1,377,406
1,395,591
1,412,422
1,431,735
1,449,548
1,472,250
1,488,137
1,504,597
1,519,329
1,530,230
214,162
GALLONS
PHYTO DISCH. (GALLONS)
14,095,826
14,251,642
14,569,481
14,777,395
15,096,686
15,399,459
15,666,164
15,989,590
16,267,348
16,606,893
16,844,525
17,115,113
17,381,675
17,586,762
3,490,936
GALLONS
AIR STRIP. RUNTIME(HRS)
3,006
3,077
3,224
3,323
3,465
3,613
3,737
3,898
4,034
4,213
4,351
4,512
4,669
4,796
1790(82%)
HOURS
LSl COMP RUN (HOURS)
3,224
3,348
3,507
3,642
3,805
3,958
4,126
4,292
4,451
4,637
4,781
4,948
5,113
5,259
2,035
HOURS
LSl COMP LOAD (HOURS)
2,071
2,142
2,267
2,356
2,487
2,589
2,727
2,864
2,962
3,070
3,153
3,246
3,339
3,414
1,343
HOURS
LS2 COMP RUN (HOURS)
13,980
14,040
14,150
14,240
14,370
14,475
14,670
14,830
14,980
15,150
15,270
15,420
15,570
15,690
1,710
HOURS
LS2 COMP LOAD (HOURS)
1,434
1,440
1,449
1,456
1,466
1,475
1,496
1,518
1,536
1,550
1,563
1,578
1,591
1,602
168
HOURS
ELECT. UPPER (kW-Hr)
12,154
12,178
12,212
12,241
12,277
12,312
12,348
12,387
12,421
12,461
12,490
12,527
12,562
12,592
438
KW-HR
WATER METER (CF)
416,815
416,863
417,098
417,190
417,225
417,676
418,000
418,670
419,368
419,699
420,000
420,383
420,861
421,174
32,605
GALLONS
BACKWASH PUMP (GAL.)
223,568
223,568
224,486
224,486
225,400
226,315
228,144
231,808
235,467
237,297
239,124
240,953
243,695
245,524
21,956
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
1,102,066
1,111,572
1,132,277
1,145,429
1,165,011
1,183,694
1,200,120
1,219,981
1,236,205
1,258,309
1,273,591
1,291,146
1,298,625
1,298,625
196,559
GALLONS
ZONE 2
1,045,829
1,054,227
1,072,028
1,084,778
1,104,513
1,123,143
1,138,712
1,158,782
1,174,307
1,194,511
1,208,509
1,225,221
1,240,727
1,253,625
207,796
GALLONS
ZONE 3
1,098,811
1,108,064
1,126,944
1,139,867
1,159,917
1,178,263
1,194,209
1,214,311
1,230,931
1,251,554
1,266,545
1,283,144
1,300,019
1,313,751
214,940
GALLONS
ZONE
1,015,052
1,023,341
1,040,721
1,051,688
1,069,730
1,086,216
1,100,925
1,118,866
1,134,511
1,153,273
1,167,018
1,181,901
1,197,998
1,209,774
194,722
GALLONS
ZONE 5
1,115,295
1,124,576
1,143,992
1,156,972
1,176,965
1,196,101
1,211,844
1,231,522
1,248,478
1,268,901
1,283,879
1,300,298
1,317,949
1,330,715
215,420
GALLONS
ZONE 6
1,127,823
1,137,260
1,157,387
1,170,547
1,191,081
1,209,824
1,227,005
1,247,300
1,265,016
1,285,902
1,300,900
1,317,439
1,334,536
1,348,506
220,683
GALLONS
ZONE 7
1,113,140
1,122,701
1,142,076
1,155,450
1,176,107
1,195,056
1,211,730
1,232,384
1,250,560
1,272,170
1,287,374
1,304,487
1,322,075
1,336,436
223,296
GALLONS
ZONE 8
1,156,980
1,167,211
1,186,865
1,200,173
1,220,529
1,239,636
1,257,055
1,275,727
1,292,262
1,312,824
1,326,673
1,342,545
1,359,618
1,373,406
216,426
GALLONS
ZONE 9
1,122,705
1,133,056
1,152,595
1,165,395
1,186,414
1,205,193
1,221,768
1,242,474
1,260,139
1,282,143
1,297,464
1,314,399
1,332,413
1,346,912
224,207
GALLONS
ZONE 10
1,187,108
1,197,594
1,217,991
1,231,498
1,252,346
1,271,058
1,288,746
1,309,273
1,327,280
1,348,177
1,363,715
1,380,654
1,398,277
1,411,753
224,645
GALLONS
ZONE 11
512,660
518,360
530,962
538,774
550,008
561,525
572,107
583,338
592,901
605,303
614,290
624,060
634,612
642,735
130,075
GALLONS
ZONE 12
1,016,862
1,027,104
1,047,080
1,060,188
1,079,419
1,098,902
1,116,364
1,137,010
1,154,922
1,176,306
1,191,896
1,208,804
1,225,392
1,239,582
222,720
GALLONS
ZONE 13
833,251
842,600
860,836
873,436
892,488
911,410
928,137
946,554
963,277
984,075
998,429
1,013,476
1,029,703
1,042,880
209,629
GALLONS
ZONE 14
877,933
887,525
905,527
917,605
935,544
953,282
968,294
987,661
1,002,779
1,023,038
1,035,996
1,051,975
1,067,980
1,080,567
202,634
GALLONS
ZONE 15
597,231
606,922
625,686
638,110
656,842
675,189
690,072
710,172
726,545
747,586
761,928
779,095
795,945
808,897
211,666
GALLONS
Zone 16
298,551
308,355
327,484
340,096
358,711
377,155
392,965
413,278
429,820
450,951
465,079
481,816
498,385
511,794
213,243
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
43%
87%
59%
84%
88%
74%
96%
81%
93%
96%
96%
93%
76%
82%
Percent
AVERAGE FLOW (GPM)
15.5
31.5
20.6
31.7
30.0
26.5
32.1
27.6
29.5
27.5
26.8
26.4
20.3
26.6
GPM
EFF. DISCH. (GALLONS)
22,259
45,406
29,702
45,613
43,253
38,101
46,204
39,680
42,443
39,605
38,655
38,080
29,298
38,331
GPD
TOTAL INFLUENT (GALLONS)
22,431
45,445
29,975
45,551
43,497
37,836
45,916
38,794
42,449
39,635
38,344
37,904
29,231
38,231
GPD
INF. LEACHATE (GALLONS)
8,286
18,404
12,261
17,704
16,879
13,986
16,366
14,711
15,385
15,045
14,895
14,089
10,880
14,530
GPD
INF. LS1-RWs (GALLONS)
4,369
7,853
5,173
9,031
7,979
7,896
9,619
6,887
7,901
6,835
4,763
6,415
4,286
6,847
GPD
INF. PWDR) (GALLONS)
8,182
16,672
10,856
15,849
16,042
13,549
17,172
14,651
16,325
15,107
16,335
15,295
12,508
14,503
GPD
INF. SIS-RWs (GALLONS)
1,595
2,516
1,685
2,967
2,598
2,404
2,759
2,545
2,838
2,648
2,351
2,105
1,557
2,351
GPD
WEEKLY RUNTIME (DAYS)
3.0
6.1
4.1
5.9
6.2
5.2
6.7
5.7
7.4
5.7
6.7
6.5
5.3
5.7
DAYS/WK
LSl COMP RUN (HOURS)
17.7
22.7
19.3
23.3
21.9
24.0
23.7
22.7
23.3
24.0
23.9
23.6
20.9
22.4
HRS/DAY
LSl COMP LOAD (HOURS)
10.1
17.9
12.7
18.7
14.6
19.7
19.6
14.0
13.5
13.8
13.3
13.3
10.7
14.8
HRS/DAY
LS2 COMP RUN (HOURS)
8.6
15.7
12.9
18.6
15.0
27.9
22.9
21.4
21.3
20.0
21.4
21.4
17.1
18.8
HRS/DAY
LS2 COMP LOAD (HOURS)
0.9
1.3
1.0
1.4
1.3
3.0
3.1
2.6
1.8
2.2
2.1
1.9
1.6
1.9
HRS/DAY
ELECTRICITY(kW-Hr)
3.4
4.9
4.1
5.1
5.0
5.1
5.6
4.9
5.0
4.8
5.3
5.0
4.3
4.8
kW-HR/DAY
CITY WATER (GALLONS)
6.9
33.6
13.1
5.0
64
46
96
100
41
SO
55
68
45
359
GPD
BACKWASH PUMP (GAL.)
131.1
130.6
131
261
523
523
229
305
261
392
261
242
GPD
EFFLUENT LABS
Fe (mg/L)
1.41
0.31
0.48
0.74
0.01
3.93
0.88
0.42
0.3
1.8
0.48
0.16
0.4
0.8
0.8
mg/L
pH
6.4
6.39
6.89
6.2
6.24
6.59
6.41
6.32
6.2
6.28
6.27
6.33
6.34
6.29
6.4
m/L
ORP
4
31
10
31
34
60
68
48
27
214
194
200
225
201
103
mV
COND
1,229
1,457
1223
1255
1321
1670
1329
1,271
1,146
1,227
1,234
1,233
1,400
1,441
1,324
uS/cm
TDS (mg/L)
848
1015
847.3
868
920.5
1180
925.2
884
801
855
859
861
985
1,007
924
mg/L
TSS (mg/L)
2.1
5
8
0
0
16
5
12
0
5
11
4.8
mg/L
COD (mg/L)
67
91
74
90
113
74
70
75
63
84
82
83
68
75
80
mg/L
WELL LEVELS
Average
Change
OWDR-4
682.16
677.43
675.92
676.64
675.95
678.61
676.75
676.00
676.34
677.05
675.91
676.16
675.64
676.56
676.5
(5.62)
OWDR-2
681.90
677.13
675.51
676.30
675.53
678.29
676.401
675.58
675.91
676.69
675.49
675.92
675.39
676.37
676.2
(5.71)
PWDR-1
689.23
658.17
656.25
656.80
656.84
658.67
657.87
658.91
659.28
661.33
660.66
660.89
657.28
658.81
658.6
(30.63)
OWDR-3
681.80
682.14
681.82
681.93
681.90
682.04
681.74
681.61
681.91
681.74
681.47
681.27
681.8
(0.02)
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
682.32
681.32
681.42
681.27
682.20
681.85
681.13
681.68
681.77
681.49
680.65
681.6
(1.57)
ESTIMATED LAKE LEVEL
682.6
682.6
682.6
682.6
682.6
682.0
682.0
682.0
682.0
682.0
682.2
682.2
682.20
682.20
682.2
SOURCE WATER
PWDR-1
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
LEACHATE(LCHT)
Ill,
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
1121
YES
LS-1 RECOVERY WELLS
IYES
YES
YES
YES
YES
YES
YESI
YES
YES
YES
YES
YES
YES
YES
SIS RECOVERY WELLS
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
FIGURE 1 - OPERATING DATA

50000
45000
40000
35000
fA
z
O
J
a 30000
O
J
LL 25000
J_
Q
W
a 20000
W
a
15000
10000
5000
0
SEABOARD Q3 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
8
7
31
5
--*---INF. LEACHATE (GALLONS)
fINF. LS1-RWs (GALLONS)
4
INF. PWDR1 (GALLONS)
--)-(—IN F. SIS-RWs (GALLONS)
3 — EFF. DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
N
1
0
FIGURE 2 - PROCESS FLOW DATA

695.00
685.00
670.00
665.00
655.00
SEABOARD Q3 2019
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
OWDR-4
OWDR-2
PWDR-1
--O-OWDR-3
--I-PW-6D (696.79)
-4--OWLFS-2
PW-16D
PW-15D
ESTIMATED LAKE LEVEL
FIGURE 3 - STATIC WATER LEVEL DATA

H
CL
Oor
ai
LL
18
16
14
12
10
8
6
4
2
0
SEABOARD Q3 2019
1,800
1,600
1,400
1,200
1,000
800
600
400
200
-
O
U
o
o
z
O
Fe (mg/L)
pH
TSS (mg/L)
--0(— O R P
COND
-TDS (mg/L)
COD (mg/L)
df
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
FIGURE 4 - SYSTEM CHEMISTRY

25.0
vn 20.0
W
a
W
a
J
0 15.0
O
Ln
W
cr
a
5
O
u 10.0
5.0
1
2 3 4
SEABOARD Q3 2019
5 6 7 8 9 10 11 12 13
WEEK
M1]
5.0
W
a
4.0 W
a
J_
a
z
3.0 O
a
N
z
O
U
2.0 �
O
a
1.0
LS1 COMP RUN (HOURS)
LS1 COMP LOAD (HOURS)
LS2 COMP RUN (HOURS)
LS2 COMP LOAD (HOURS)
ELECTRICITY (kW-Hr)
FIGURE 5 - UTILITY USE DATA

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Influent'
10.3
36.4
16.9
19.9
83.5
Mechanical
Effluent'
10.5
0.082
0.070
0.06
10.6
Treatment
System
% Contaminant Removal
<
99.8%
99.6%
99.7%
87.3%
Irrigation water
10,500
82
70
60
10,600
Drainage water
358
ND
ND
ND
358
Lys 2 (vol. scaling factor, 346)
Lys 7 (vol. scaling factor, 458)
__
__
__
__
--
Lys 8 vol. scalingfiactor, 462
ND
ND
ND
23.8
23.8
Lys 9 vol. scalin actor, 295
--
--
--
--
--
Step 2
Lys 10 vol. scalin actor, 473
332
ND
ND
3.0
335
Phytoremediation
Lys 11A vol. scalin actor, 345
482
ND
ND
6.0
488
System
Lys 11B vol. scalin actor, 1315
682
ND
ND
205
682
Lys 12E vol. scalin actor, 174
445
ND
ND
14.4
459
Lys 12W vol. scalin actor, 427
41
ND
ND
ND
41
Lys 13E vol. scalin actor, 281
300
ND
ND
ND
300
Lys 13W vol. scalin actor, 290
299
ND
ND
6.0
305
Lys 14 vol. scalin actor; 247
90
ND
ND
ND
90
Lys 15 vol. scalin actor, 637
62
ND
ND
462
62
Averse (n=13)
238
ND
ND
4.1
242
Step 2
% Contaminant Removal
97.7
100%
100%
93.2%
97.7
Overall Percent Contaminant Removal
97.7%
100%
100%
99.97%
99.7%
' Apparent variations in the influent and effluent mass are a result of variations related to residence time through the mechanical treatment system.
Averages calculated from a greater number of samples show that influent and effluent mass are essentially equal, as expected.
FIGURE 6 - CONTAMINANT REMOVAL EFFICIENCY

SEABOARD GROUP II AND THE CITY OF HIGH POINT
February 7, 2020
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Remedial Action Progress Report, 2019 Fourth Quarter
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point (Parties) are providing this 2019 Fourth
Quarter Remedial Action Progress Report for the former Seaboard Chemical Corporation facility
and the closed Riverdale Drive Landfill located in Jamestown, NC (Site).
During the fourth quarter of 2019 the mechanical and phytoremediation treatment systems
processed 826,206 gallons of extracted groundwater and leachate. Also during the fourth quarter
of 2019 the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
October 3, 2019
7.0 days
Citric wash of entire system
October 14, 2019
63.0 days
System shutdown for PLC/HMI upgrade
The PLC/HMI control system update began on October 3, 2019 with the planned full system
citric wash and was completed on December 16, 2019 when the system was put into full-time
operations following upgrade to the PLC/HMI system. The citric wash of the entire system was
conducted as a precautionary measure while the system was shutdown for the PLC/HMI work.
In addition, equipment associated with the non -operational PhotoCat system was completely
removed from the treatment system enclosures and recycled or disposed of as appropriate. The
treatment system has been restarted and is fully operational with the new PLC/HMI system
functioning as anticipated.
The attached tables provide the results of the full scale operation of the treatment system during
the fourth quarter of 2019, including: Operating Data, Process Flow Data, Static Water Level
Data, System Chemistry, Utility Data Use, Fourth Quarter 2019 Contaminant Removal
Efficiency, and Annual Summary of Contaminant Removal Efficiency.

Please contact Mr. Gary D. Babb, P.G. (919/605-4719) or Craig Coslett (610/435-1151) if there
are any questions or comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
r�
Gary D. Babb, P.G.
President
cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q4 2019
Quarterly
Units of
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
2
-
a
LEACHATE (GALLONS)
449,030
492,201
492,201
492,201
492,201
492,201
492,201
492,201
492,201
492,201
492,201
507,134
660,819
820,493
371,463
GALLONS
LSl-RWs (GALLONS)
2,774,312
2,789,305
2,789,305
2,789,305
2,789,305
2,789,305
2,789,305
2,789,305
2,789,305
2,789,305
2,789,305
2,790,312
2,829,714
2,877,242
102,930
GALLONS
PWDR1(GALLONS)
2,183,632
2,233,452
2,233,452
2,233,452
2,233,452
2,233,452
2,233,452
2,233,452
2,233,452
2,233,452
2,233,452
2,241,149
2,339,237
2,437,473
253,841
GALLONS
SIS-RWs(GALLONS)
1,530,230
1,538,191
1,538,191
1,538,191
1,538,191
1,538,191
1,538,191
1,538,191
1,538,191
1,538,191
1,538,191
1,540,843
1,570,038
1,594,864
64,634
GALLONS
PHYTO DISCH. (GALLONS)
7,586,762
7,726,725
7,726,725
7,726,725
7,726,725
7,726,725
7,726,725
7,726,725
7,726,725
7,726,725
7,726,725
7,769,374
8,086,748
8,412,968
826,206
GALLONS
AIR STRIP. RUNTIME (HRS)
4,796
4,875
4,875
4,875
4,875
4,875
4,875
4,875
4,875
4,875
4,875
4,892
5,048
5,216
419.88 (19%)
HOURS
LSl COMP RUN (HOURS)
5,259
5,334
5,334
5,334
5,334
5,334
5,334
5,334
5,334
5,334
5,334
5,370
5,529
5,697
438
HOURS
LSl COMP LOAD (HOURS)
3,414
3,455
3,455
3,455
3,455
3,455
3,455
3,455
3,455
3,455
3,455
3,463
3,522
3,577
163
HOURS
LS2 COMP RUN (HOURS)
15,690
15,750
15,750
15,750
15,750
15,750
15,750
15,750
15,750
15,750
15,750
15,780
15,930
16,080
390
HOURS
LS2 COMP LOAD (HOURS)
1,602
1,609
1,609
1,609
1,609
1,609
1,609
1,609
1,609
1,609
1,609
1,613
1,631
1,648
46
HOURS
ELECT. UPPER (kW-Hr)
12,592
12,612
12,659
12,706
12,753
12,800
12,847
12,893
12,940
12,987
13,034
13,081
13,171
13,248
656
KW-HR
WATER METER (CF)
421,174
421,462
421,462
421,462
421,462
421,462
421,462
421,462
421,462
421,462
421,462
429,311
429,452
429,590
62,952
IGALLONS
BACKWASH PUMP (GAL.)
245,524
247,330
247,330
247,330
247,330
247,330
247,330
247,330
247,330
247,330
247,330
248,350
248,800
248,998
3,474
IGALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
1,298,625
1,298,625
1,298,625
1,298,625
1,298,625
1,298,625
1,298,625
1,298,625
1,298,625
1,298,625
1,298,625
116
272
21,535
21,535
GALLONS
ZONE 2
1,253,625
1,245,491
1,245,491
1,245,491
1,245,491
1,245,491
1,245,491
1,245,491
1,245,491
1,245,491
1,245,491
13,994
35,298
56,621
48,487
GALLONS
ZONE 3
1,313,751
1,322,924
1,322,924
1,322,924
1,322,924
1,322,924
1,322,924
1,322,924
1,322,924
1,322,924
1,322,924
1,868
24,774
48,353
57,526
GALLONS
ZONE
1,209,774
1,217,749
1,217,749
1,217,749
1,217,749
1,217,749
1,217,749
1,217,749
1,217,749
1,217,749
1,217,749
587
20,167
40,034
48,009
GALLONS
ZONE 5
1,330,715
1,340,447
1,340,447
1,340,447
1,340,447
1,340,447
1,340,447
1,340,447
1,340,447
1,340,447
1,340,447
611
23,370
45,893
55,625
GALLONS
ZONE 6
1,348,506
1,358,436
1,358,436
1,358,436
1,358,436
1,358,436
1,358,436
1,358,436
1,358,436
1,358,436
1,358,436
580
23,641
46,477
56,407
GALLONS
ZONE 7
1,336,436
1,346,248
1,346,248
1,346,248
1,346,248
1,346,248
1,346,248
1,346,248
1,346,248
1,346,248
1,346,248
805
24,315
48,139
57,951
GALLONS
ZONE 8
1,373,406
1,382,340
1,382,340
1,382,340
1,382,340
1,382,340
1,382,340
1,382,340
1,382,340
1,382,340
1,382,340
820
24,210
48,138
57,072
GALLONS
ZONE 9
1,346,912
1,357,240
1,357,240
1,357,240
1,357,240
1,357,240
1,357,240
1,357,240
1,357,240
1,357,240
1,357,240
656
23,732
47,215
57,543
GALLONS
ZONE 10
1,411,753
1,421,119
1,421,119
1,421,119
1,421,119
1,421,119
1,421,119
1,421,119
1,421,119
1,421,119
1,421,119
825
24,993
49,191
58,557
GALLONS
ZONE 11
642,735
647,643
647,643
647,643
647,643
647,643
647,643
647,643
647,643
647,643
647,643
248
14,642
28,293
33,201
GALLONS
ZONE 12
1,239,582
1,248,671
1,248,671
1,248,671
1,248,671
1,248,671
1,248,671
1,248,671
1,248,671
1,248,671
1,248,671
751
23,405
45,789
54,878
GALLONS
ZONE 13
1,042,880
1,051,387
1,051,387
1,051,387
1,051,387
1,051,387
1,051,387
1,051,387
1,051,387
1,051,387
1,051,387
705
20,987
41,250
49,757
GALLONS
ZONE 14
1,080,567
1,089,180
1,089,180
1,089,180
1,089,180
1,089,180
1,089,180
1,089,180
1,089,180
1,089,180
1,089,180
670
20,504
40,020
48,633
GALLONS
ZONE 15
808,897
817,805
817,805
817,805
817,805
817,805
817,805
817,805
817,805
817,805
817,805
708
21,168
41,715
50,623
GALLONS
Zone 16
511,794
520,614
520,614
520,614
520,614
520,614
520,614
520,614
520,614
520,614
520,614
726
7,079
11,033
19,853
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
256%
0%
0%
0%
0%
0%
0%
0%
0%
0%
10%
93%
100%
35%
Percent
AVERAGE FLOW (GPM)
32.4
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
4.2
31.5
32.4
7.7
GPM
EFF. DISCH. (GALLONS)
46,654
-
6,093
45,339
46,603
11,130
GPD
TOTAL INFLUENT (GALLONS)
38,648
-
3,756
45,767
47,181
10,412
GPD
INF. LEACHATE (GALLONS)
14,390
-
-
-
-
-
2,133
21,955
22,811
4,715
GPD
INF. LS1-RWs (GALLONS)
4,998
-
-
-
-
-
144
5,629
6,790
1,351
GPD
INF. PWDR) (GALLONS)
16,607
-
-
-
-
-
-
1,100
14,013
14,034
3,519
GPD
INF. SIS-RWs (GALLONS)
2,654
-
-
-
-
-
379
4,171
3,547
827
GPD
WEEKLY RUNTIME (DAYS)
7.7
-
-
-
-
-
-
0.7
6.5
7.0
1.7
DAYS/WK
LSl COMP RUN (HOURS)
25.0
-
-
-
-
-
5.1
22.7
24.0
5.9
HRS/DAY
LSl COMP LOAD (HOURS)
13.7
-
-
-
-
-
1.1
8.4
7.9
2.4
HRS/DAY
LS2 COMP RUN (HOURS)
2040
-
-
4.3
21.4
21.4
5.2
HRS/DAY
LS2 COMP LOAD (HOURS)
2.3
-
-
0.6
2.6
2.4
0.6
HRS/DAY
ELECTRICITY(kW-Hr)
6.7
4.3
6.7
6.7
6.7
6.7
6.7
6.7
6.7
6.7
6.7
12.9
11.0
7.3
kW-HR/DAY
CITY WATER (GALLONS)
96.0
-
-
1,121
20
20
723
GPD
BACKWASH PUMP (GAL.)
602.0
-
-
146
64
28
65
GPD
EFFLUENT LABS
Fe (mg/L)
0.8
0.61
0.29
0.57
0.5
mg/L
pH
6.29
6.17
6.64
6.53
6.4
m/L
ORP
201
162
166
127
152
mV
COND
1,441
1,147
1,267
1,282
1,232
uS/cm
TDS(mg/L)
1007
799
899
905
868
mg/L
TSS (mg/L)
11
6
3
2
3.7
mg/L
COD (mg/L)
75
83
85
94
87
mg/L
WELL LEVELS
Average
Change
OWDR-4
682.16
676.09
676.82
677.55
676.8
(5.34)
OWDR-2
681.90
675.85
676.62
677.39
676.6
(5.28)
PWDR-1
689.23
657.75
674.69
674.70
669.0
(20.18)
OWDR-3
681.80
686.67
686.67
686.7
4.87
PW-6D (696.79)
680.37
684.78
684.78
684.8
4.41
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
(683.12)
ESTIMATED LAKE LEVEL
682.6
682.9
682.3
682.6
682.20
682.10
682.4
SOURCE WATER
PWDR-1
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NOI
YESI
YES
YES
LEACHATE (LCHT)
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
LS-1 RECOVERY WELLS
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
SIS RECOVERY WELLS
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
FIGURE 1 - OPERATING DATA

50000
45000
40000
35000
Ln
z
O
J
30000
C7
O
J
LL 25000
J
Q
0
W
a 20000
Lu
a
10000
5000
A
SEABOARD Q4 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK
E?
7
r-
5 INF. LEACHATE (GALLONS)
fINF. LS1-RWs (GALLONS)
INF. PWDR1 (GALLONS)
4 --0—INF. SIS-RWs (GALLONS)
--I—EFF. DISCH. (GALLONS)
3 WEEKLY RUNTIME (DAYS)
2
1
w
FIGURE 2 - PROCESS FLOW DATA

695.00
685.00
680.00
J
W
J 675.00
J
J
W
670.00
665.00
655.00
0 1 2 3 4 5
SEABOARD Q4 2019
6 7 8
WEEK
9 10 11 12 13
tOWDR-4
tOWDR-2
fPWDR-1
--X--OWDR-3
-*--PW-6D (696.79)
--*--OWLFS-2
tPW-16D
PW-15D
ESTIMATED LAKE LEVEL
FIGURE 3 - STATIC WATER LEVEL DATA

7
0
5
4
x
a
O
0
°.L 3
2
1
on
SEABOARD Q4 2019
1 2 3 4 S 6 7 8 9 10 11 12 13
WEEK
1,400
1,200
1,000
O
Fe (mg/L)
800
o
f pH
p'
+TSS (mg/L)
Z
0
U
--0F ORP
600 a
-I-COND
o
--40--TDS (mg/L)
COD (mg/L)
400
200
FIGURE 4 - SYSTEM CHEMISTRY

14.0
12.0
10.0 C7
a
cr
W
a
J
8.0 0
—4--LS1 COMP RUN (HOURS)
Z
O
fLS1 COMP LOAD (HOURS)
a
g
fLS2 COMP RUN (HOURS)
6.0 N
Z
—+(—LS2 COMP LOAD (HOURS)
O
--I—ELECTRICITY (kW-Hr)
W
4.0 a
2.0
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
FIGURE 5 - UTILITY USE DATA

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Influent'
3.7
11.7
5.0
6.5
26.9
Mechanical
Effluent 1
3.8
0.22
0.10
0.054
4.2
Treatment
System
% Contaminant Removal
<
98.1
98.0
99.2
84.3
Irrigation water
3,800
222
100
54
4,200
Drainage water
181
ND
ND
4.2
185
Lys 2 (vol. scaling factor, 292)
Lys 7 (vol. scaling factor, 386)
730
ND
ND
228
958
Lys 8 (vol. scalin factor, 608)
121
ND
ND
18.2
139
Lys 9 (vol. scalin factor, 291)
166
ND
ND
ND
166
Step 2
Lys 10 (vol. scalin factor, 513)
66.7
ND
ND
37.4
104
Phytoremediation
Lys 11A (vol. scalin factor, 365)
500
ND
ND
ND
500
System
Lys 11B (vol. scalin factor, 1,907)
114
ND
ND
ND
114
Lys 12E (vol. scalin factor; 159)
397
ND
ND
ND
397
Lys 12W (vol. scalin factor, 377)
35
ND
ND
ND
35
Lys 13E (vol. scalin factor; 199)
469
ND
ND
18.0
487
Lys 13W (vol. scaling factor, 271)
175
ND
ND
13.8
189
Lys 14 (vol. scalin factor, 358)
--
ND
ND
--
--
Lys 15 (vol. scalin factor, 1,923)
142
ND
ND
(1827)*
(1969)*
Averse (n=13)
238
ND
ND
26.6
273
Step 2
% Contaminant Removal
93.7%
100%
100%
50.7%
93.5%
Overall Percent Contaminant Removal
93.6%
100%
100%
99.6%
99.0%
1 Apparent variations in the influent and effluent mass are a result of variations related to residence time through the mechanical treatment system.
Averages calculated from a greater number of samples show that influent and effluent mass are essentially equal, as expected.
FIGURE 6 - FOURTH QUARTER 2019 CONTAMINANT REMOVAL EFFICIENCY

Phytoremediation
System
% Contaminant Removal
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
mass
influent, g
10,280
370
200
590
11,400
Q1
effluent, g
1,125
ND
ND
33.2
1,278
% removal
87.9
100
100
94.4
88.8
influent, g
10,000
180
110
90
10,200
Q2
effluent, g
639
ND
ND
3.5
642
% removal
93.6
100
100
96.1
93.7
influent, g
10,500
82
70
60
10,600
Q3
effluent, g
238
ND
ND
4.1
242
% removal
97.7
100
100
93.2
97.7
influent, g
3,800
222
100
54.0
4,200
Q4
effluent, g
238
ND
ND
26.6
273
% removal
93.7%
100%
100%
50.7%
93.5%
influent, g
34,580
854
480
794
36,400
Annual
effluent, g
2,240
ND
ND
91.5
2,435
Totals
% removal
93. 5 %
100%
100%
88. 5 %
93.3°
FIGURE 7 - ANNUAL SUMMARY OF CONTAMINANT REMOVAL EFFICIENCY