2018 CAMA Annual Report 1 of 2

�� DUKE
ENERGY
April 30, 2019
North Carolina Department of Environmental Quality
Division of Water Resources
Water Quality Regional Operations Section
3800 Barrett Drive
1628 Mail Service Center
Raleigh, North Carolina 27699
Attn: Mr. Eric Rice (submitted electronically via FTP)
Re: 2018 Roxboro CAMA Annual Report
Roxboro Steam Electric Plant
1700 Dunnaway Road
Semora, NC 27343
Dear Mr. Rice:
2500 Fairfax Road
Greensboro, North Carolina 27407
336-2154576
Enclosed you will find the 2018 CAMA Annual Report prepared by SynTerra Corporation for
the Duke Energy Roxboro Steam Electric Plant. This Annual Report documents the information
required by the North Carolina Department of Environmental Quality per letter dated May 1,
2017.
If you have any questions or need any clarification regarding the information provided, feel free
to contact me at [e-mail] or at 336-215-45776 at your convenience.
Respectfully submitted,
Kimberlee Witt, PE, ME
Duke Energy, Environmental Services
cc : Eric Smith — DEQ Central Office
Steve Lanter — DEQ Central Office
Ed Sullivan - Duke Energy
Scott Davies — Duke Energy
Craig Eady — SynTerra Corporation
Page 1 of 1

2018 LAMA ANNUAL INTERIM
MONITORING REPORT
FOR
ROXBORO STEAM ELECTRIC PLANT
1700 DUNNAWAY ROAD
SEMORA, NC 28401
APRIL 30, 2019
PREPARED FOR:
DUKE ENERGY PROGRESS, LLC
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MONITORING REPORT
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SEMORA� NORTH CAROLINA 28401
APRIL 30, 2019
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
EXECUTIVE SUMMARY
ES.1 Introduction
This annual report evaluates the results of groundwater monitoring performed on a
quarterly basis during the 2018 calendar year at the Roxboro Steam Electric Plant
(Roxboro, Plant or Site). The Site is a coal-fired electricity -generating facility owned and
operated by Duke Energy located near the town of Semora, in Person County, North
Carolina. Monitoring was performed in accordance with the requirements of the Coal
Ash Management Act (CAMA) of 2014 (15A NCAC 13B .2001), in correspondence with
the North Carolina Department of Environmental Quality (NCDEQ), and based on the
Interim Monitoring Plan (IMP) developed for the Site.
A generalized conceptual site model (CSM) for the Roxboro Site is presented below. The
ash basins were constructed within former perennial stream valleys in the Piedmont of
North Carolina. The following components of the hydrogeologic setting limit
Constituents of interest (COI) transport in groundwater:
• Topographic ridges reflect groundwater divides on either side of the stream
valley that inhibit lateral flow side gradient of the basins.
• Naturally occurring upward vertical groundwater gradients to former perennial
stream limits downward migration of COIs under the basins.
• Nearly neutral hydraulic gradients within impounded ash promote horizontal
flow across the ash basins.
• The hydraulic pressure of ponded water in the ash basins drives seepage flow of
groundwater under the basin dams.
• Beyond the dams, groundwater flows upward toward Hyco Reservoir, limiting
downward migration of COIs to the area in close proximity to the dam with few
exceptions.
The 2018 distribution and concentration of COIs in groundwater within the transition
and bedrock flow zones are evaluated with respect to historical Site conditions.
Changes to Site conditions that occurred during 2018 that may influence groundwater
flow or quality are also discussed.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
ES.2 Key Findings
Key findings of the quarterly CAMA monitoring conducted in 2018 include:
• The West Ash Basin (WAB) and East Ash Basin (EAB) are considered the
primary sources of coal combustion residuals (CCR)-related constituents in
groundwater at the Site.
• The current distribution of COIs at the Roxboro Plant are contained within the
Site.
• No imminent hazards to human health and safety or evidence of ecological risks
related to the ash basins have been identified.
• Groundwater flow direction is consistent with the slope -aquifer system model
common to the Piedmont Physiographic Province and is away from potential
water supply receptors located upgradient of the Site.
• The ash basins are flow -through systems with upward hydraulic gradients into
the former stream valleys at upgradient ends of the basins. Hydraulic gradients
are predominantly horizontal across the basins. Hydraulic gradients are
downward in the vicinity of the peripheral dikes and ash basin main dams due
to the hydraulic head in the basins near the dams. Upward vertical gradients
occur downgradient of the dams and dikes in the vicinity of receiving water
bodies (groundwater discharge areas). This flow -through system limits
downward vertical migration of COIs into groundwater to the areas in close
proximity to the dams and dikes.
• Boron is the key indicator of groundwater migration associated with the ash
basins. Additional COI concentrations identified as being greater than their
respective regulatory standards or background values are generally confined
within the extent of the boron plume at the Site.
• The COI plume beneath the ash basins is stable (not expanding) and no
significant changes have been observed.
ES.3 Interim Monitoring Plan Updates
Duke Energy submitted an optimized IMP to NCDEQ on March 20, 2019, which was
approved on April 4, 2019. The plan recommends adjusting the well and water quality
parameter lists to more efficiently monitor groundwater conditions at the Site. The
optimized 2019 IMP is designed to provide data associated with changes to the Site
groundwater occurrence, flow and quality as remedial efforts (e.g., ash basin decanting,
closure) are phased in.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
Please note that the list of Site -specific COIs for inclusion into the groundwater
corrective action plan (CAP) is currently undergoing review using the COI
management approach presented to the NCDEQ on March 15, 2019. COIs proposed for
management under the CAP would be based on:
• Comparing constituent concentrations to regulatory standards and/or
background values
• Evaluating each constituent's relative mobility
• Reviewing constituent distribution in groundwater based on geochemical
conditions
• Comparing each constituent's relative concentration observed in ash pore water
to the concentration observed in groundwater
• Evaluating constituent concentration trends over time
The results of this review will be presented in the CAP and may result in proposed
modifications to the monitoring program at that time.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
TABLE OF CONTENTS
SECTION
PAGE
EXECUTIVE SUMMARY....................................................................................................
ES-1
ES.1 Introduction............................................................................................................
ES-1
ES.2 Key Findings...........................................................................................................
ES-2
ES.3 Interim Monitoring Plan Updates.......................................................................
ES-2
1.0 INTRODUCTION.........................................................................................................1-1
1.1 Objectives and Purpose............................................................................................1-1
1.2 Site Overview and History......................................................................................1-2
1.3 Changing Site Conditions........................................................................................1-3
1.4 Regional Hydrogeology...........................................................................................1-3
1.5 Site Hydrogeology....................................................................................................1-4
1.6 Previous Reporting...................................................................................................1-5
1.7 Overview of Findings for 2018................................................................................1-6
2.0 2018 MONITORING ACTIVITIES...........................................................................
2-1
2.1 2018 Quarterly Sampling Schedule........................................................................
2-1
2.2 Changes to the CAMA Groundwater Monitoring Network ..............................
2-1
2.3 Water Level Measurements.....................................................................................2-2
2.4 Groundwater Sampling Methods...........................................................................2-3
2.5 Laboratory Analyses.................................................................................................
2-3
2.6 Quality Control Summary (Data Validation).......................................................2-3
3.0 2018 MONITORING RESULTS.................................................................................3-1
3.1 Site -Wide Groundwater Occurrence and Flow ....................................................
3-1
3.1.1 East Ash Basin.....................................................................................................
3-2
3.1.2 West Ash Basin....................................................................................................3-3
3.1.3 Horizontal Gradients..........................................................................................3-4
3.1.4 Vertical Gradients...............................................................................................
3-4
3.1.5 Groundwater Seepage Velocity........................................................................
3-6
3.2 Data Reduction and Evaluation..............................................................................3-6
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
TABLE OF CONTENTS (CONTINUED)
SECTION
PAGE
3.3 East Ash Basin Water Quality............................................................................... 3-11
3.3.1 Site Conditions.................................................................................................. 3-11
3.3.2 Constituent Occurrence and Plume Status ................................................... 3-12
3.4 West Ash Basin Water Quality..............................................................................3-15
3.4.1 Site Conditions.................................................................................................. 3-15
3.4.2 Constituent Occurrence and Plume Status ................................................... 3-15
4.0 SUMMARY AND CONCLUSIONS.........................................................................4-1
4.1 Groundwater Occurrence and Flow......................................................................4-1
4.2 Groundwater Quality............................................................................................... 4-1
5.0 INTERIM MONITORING PLAN UPDATES......................................................... 5-1
5.1 Optimization of the Monitoring Program............................................................. 5-1
5.2 2019 Monitoring and Reporting Schedule.............................................................5-2
6.0 REFERENCES................................................................................................................ 6-1
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
LIST OF FIGURES
Figure 1-1 Site Location Map
Figure 1-2 Site Map with Monitoring Well Locations
Figure 3-1 Water Level Map - East Ash Basin - Transition/Bedrock Flow Zone
(November 12 & 13, 2018)
Figure 3-2 Water Level Map - West Ash Basin - Transition/Bedrock Flow Zone
(November 12 & 13, 2018)
Figure 3-3 Hydrographs
Figure 3-4 Flow Velocity Vectors and Magnitudes - Transition Flow Zone
Figure 3-5 Flow Velocity Vectors and Magnitudes - Bedrock Flow Zone
Figure 3-6 Vertical Flow Velocity Vectors and Magnitudes
Figure 3-7 General Cross -Section A -A' - East Ash Basin
Figure 3-8 General Cross -Section B-B' - East Ash Basin
Figure 3-9 General Cross -Section C-C' - West Ash Basin
Figure 3-10 General Cross -Section D-D' - West Ash Basin
Figure 3-11 Isoconcentration Map - Geomean of Boron in Transition Flow Zone
Figure 3-12 Isoconcentration Map - Geomean of Boron in Bedrock Flow Zone
Figure 3-13 Isoconcentration Map - Geomean of Sulfate in Transition Flow Zone
Figure 3-14 Isoconcentration Map - Geomean of Sulfate in Bedrock Flow Zone
Figure 3-15 Isoconcentration Map - Geomean of Total Dissolved Solids in Transition
Flow Zone
Figure 3-16 Isoconcentration Map - Geomean of Total Dissolved Solids in Bedrock
Flow Zone
Figure 3-17 Time -Series Plots - East Ash Basin
Figure 3-18 Time -Series Plots - West Ash Basin
Figure 3-19 Time -Series Plots - West Ash Basin
LIST OF TABLES
Table 1-1 Monitoring Well Construction Information
Table 2-1 2018 CAMA Water Elevations
Table 3-1 Horizontal Hydraulic Gradients and Flow Velocities
Table 3-2 Vertical Hydraulic Gradients
Table 3-3 2018 Comprehensive Groundwater Quality Data
Table 3-4 Data Qualifiers and Acronyms
Table 3-5 Geometric Mean of COIs - 2018 Quarterly Data
Table 3-6 Constituents of Interest Evaluation
Table 3-7 Groundwater Background Threshold Values and Regional Background
Concentration Ranges
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
LIST OF APPENDICES
Appendix A Correspondence with NCDEQ
Appendix B Field Data and Forms
• Groundwater Sampling Forms
• Water Level Measurements
• Well Abandonment Records
• Well/boring Logs
Appendix C Approved Low Flow Sampling Plan
Appendix D Laboratory Analytical Data (Laboratory Reports)
and Data Validation Checklists
• Q1-2018
• Q2-2018
• Q3-2018
• Q4-2018
Appendix E Optimized Interim Monitoring Plans for 2019
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
LIST OF ACRONYMS
02L
NCDEQ Title 15A, Subchapter 02L. Groundwater Classification and
Standards
bgs
Below ground surface
BR
bedrock zone
BTV
Background threshold value
°C
degrees Celsius
CAMA
Coal Ash Management Act
CAP
Corrective Action Plan
CCR
Coal Combustion Residuals
COC
Chain of Custody
COI
Constituent of Interest
CSA
Comprehensive Site Assessment
CSM
Conceptual Site Model
D
transition zone
DWM
Division of Waste Management
DFA
Dry fly ash
dh/dl
horizontal hydraulic gradient
Duke Energy
Duke Energy Progress, LLC
DQO
Data Quality Objective
EAB
East Ash Basin
EMP
Effectiveness Monitoring Plan
FGD
flue gas desulfurization
ft
feet
IMAC
Interim Maximum Allowable Concentration
IMP
Interim Monitoring Plan
k
hydraulic conductivity
LRB
Lined Retention Basin
MARLAP
Multi -Agency Radiological Laboratory Analytical Protocols
NAVD88
North American Vertical Datum 1988
NCAC
North Carolina Administrative Code
NCDEQ
North Carolina Department of Environmental Quality
NCDENR
North Carolina Department of Environment and Natural Resources
ne
effective porosity
NPDES
National Pollutant Discharge Elimination System
NTUs
Nephelometric Turbidity Units
PBTV
Provisional background threshold value
S
surficial/shallow zone
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
LIST OF ACRONYMS (CONTINUED)
S.U.
Standard Units
SW
Solid Waste
SWLF
Solid Waste Landfill
TDS
Total dissolved solids
µg/L
Micrograms per liter
USEPA
United States Environmental Protection Agency
UTL
upper tolerance limit
Vs
seepage flow velocity
WAB
West Ash Basin
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
1.0 INTRODUCTION
1.1 Objectives and Purpose
The purpose of this report is to evaluate the data from the Interim Monitoring Plan
(IMP) groundwater monitoring performed at the Roxboro Steam Electric Plant
(Roxboro, Plant, or Site) for the 2018 calendar year. IMP sampling is conducted at the
site to meet the requirements of the Coal Ash Management Act (CAMA) of 2014 (15A
NCAC 13B .2001). Quarterly sampling was conducted on monitoring wells designated
as part of the IMP in correspondence from the North Carolina Department of
Environmental Quality (NCDEQ), dated May 1, 2017 (revised December 20, 2017); April
6, 2018; June 29, 2018; and September 28, 2018 (Appendix A).
An Effectiveness Monitoring Program (EMP) is required by CAMA §130A-309.209
(b)(1)e. The EMP for Roxboro is anticipated to begin once the basin closure and
groundwater CAP have been implemented. In the interim, an IMP has been developed
at the direction of NCDEQ. The CAP, and a proposed EMP, will be submitted at a
future date.
This report is prepared in accordance with NCDEQ's Division of Water Resources 2017
guidance document for the investigation of soil and groundwater contamination
(NCDEQ, 2017a). Data were used to evaluate groundwater quality, occurrence, and
flow at the Site. Constituents of interest (COIs) are those with concentrations greater
than one or more of the groundwater screening criteria (NCAC 02L standard [2L
standard], Interim Maximum Allowable Concentration [IMAC], or approved
background threshold value (BTV)).
The distribution and concentration of COIs in groundwater within the shallow,
transition, and bedrock flow zones are discussed and evaluated with respect to
historical Site conditions. Changes to ash and wastewater handling systems during 2018
that may affect groundwater conditions at the Site are also documented and discussed.
Geometric means (geomeans) of the COI data is used to support the analysis of
groundwater conditions and to provide a basis for defining the extent of the COI
plume. The geomean method was selected in order to capture the central tendency of
the data, which might vary over several orders of magnitude. Reported geomeans were
calculated using the four quarters of valid IMP sampling data from 2018. A single
sample result may not be an accurate representation of the concentrations observed
over four quarters of data in 2018. Evaluating plume geometries with geomean data
minimizes the potential for incorporating occasions when COIs are reported at
concentrations outside of the typical concentration range, and potentially greater than
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
enforceable groundwater standards. Previous site assessments may have over-
represented areas impacted by the ash basins by posting a single data set on maps and
cross -sections that may have included isolated data anomalies. Rationale and
procedures for calculating geomeans are discussed in greater detail in Section 3.2.
1.2 Site Overview and History
Roxboro is a coal fired electricity -generating facility in north -central North Carolina
owned and operated by Duke Energy Progress, LLC (Duke Energy). The Site is situated
on approximately 6,095 acres of company -owned property located between McGhees
Mill Road to the east, Semora Road (Highway 57) to the south, and Hyco Reservoir to
the west and north. Figure 1-1 depicts the Site topography and nearby surface water
features.
Coal combustion residual (CCR) materials have historically been managed by ash
deposition within two basins (surface impoundments): the East Ash Basin (EAB) and
the West Ash Basin (EAB).
The EAB was developed in 1964 with the construction of an earthen dam,
approximately 50 feet in height in a former, unnamed stream channel. CCRs were
deposited in the EAB by hydraulic sluicing operations. Wastewater from the ash basin
began discharging in 1966 via a discharge canal to the Intake Canal of the Hyco
Reservoir. In 1973, the EAB dam was raised 20 feet to its present configuration and the
discharge canal was relocated to increase treatment capacity. In 1986, Duke Energy and
the NC Department of Environmental and Natural Resources (NCDENR) entered into a
Special Order by Consent that required the Roxboro facility to convert to dry fly ash
(DFA) handling resulting in construction of the industrial landfill (NCDEQ DWM
Permit No. 7302-INDUS) located mostly within the footprint of the EAB. Landfill
construction required an earthen separator dike on the eastern portion of the EAB for
base grade foundation. A barrier separating the EAB from the discharge canal and a
portion of the EAB was formed when the separator dike was constructed resulting in
EAB surface water flows routed to the WAB.
The WAB was created in 1973 with the construction of an earthen dam (main dam) in a
former stream channel to the southwest of the power block. Engineered toe drains,
located in a row at the base of the main dam, discharge to the heated water discharge
pond. In 1986, WAB main dam was raised 13 feet and a series of dikes (Dikes 1 through
4) and a discharge canal were constructed to increase the storage capacity of the WAB
and modify the circulation pattern to increase ash settling time. The rock filter dike
(Dike 1), constructed of rock fill with a sand filter blanket, was installed near the
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
southern end of the WAB to create a secondary settling basin and to isolate the major
portion of the WAB.
The Gypsum Storage Area is located downgradient of the EAB and situated between
the EAB and the Intake Canal. The Gypsum Storage Area was constructed in 2007 and
incorporated approximately 131,319 cubic yards of DFA as structural fill, which was
placed in the western and central portions of the Gypsum Storage Area to fill in former
topographical low-lying areas. Assessments are ongoing to determine if the Gypsum
Storage Area is a separate source.
Groundwater flow is generally to the north/northwest from the ash basins and migrates
from the EAB and WAB toward the Intake Canal and Plant wastewater features.
1.3 Changing Site Conditions
Several changes to Site operations and conditions to support ash basin closure occurred
in 2018 or are scheduled to occur in 2019 which are relevant to the ash basin
groundwater evaluations.
Decanting of the WAB is anticipated to begin no later than June 30, 2019. Pressure
transducers and geochemical sondes are installed in select wells in and around the ash
basins to record changes in water levels and geochemical parameters. Reducing the
hydraulic head in the WAB through decanting will reduce the vertical and horizontal
hydraulic gradients that drive constituent migration, with the greatest reduction near
the dam. Construction of a lined retention basin (LRB), wastewater treatment system,
and associated conveyance piping was ongoing in 2018. This system will come online in
2019 to receive FGD wastewater, landfill leachate, and industrial stormwater currently
discharging to the WAB.
1.4 Regional Hydrogeology
The Site is located in the Piedmont Physiographic Province. A conceptual model of
groundwater flow in the Piedmont, which is applicable to Roxboro, was developed by
LeGrand (1988, 1989) and Harried and Daniel (1992). The model describes a slope -
aquifer system with a regolith and bedrock drainage basin with a perennial valley
system (LeGrand, 2004). Groundwater is recharged by drainage in the uplands
followed by discharge to the perennial stream. Flow in the regolith follows porous
media principals, while flow in bedrock is provided by the presence of secondary
porosity features (fractures). Rarely does groundwater move beneath a perennial
stream to another more distant stream or across drainage divides (LeGrand, 1989).
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
1.5 Site Hydrogeology
Groundwater from the ash basins generally flows to north/northwest toward Plant
wastewater features or the Intake Canal. The topographically controlled flow direction
provides natural hydraulic control of potential COI migration within the former stream
valley systems.
Three hydrostratigraphic units were identified at the Site:
• Shallow/Surficial Zone (S) — Composed of regolith (including residual soils, fill
and reworked soils, alluvium, and saprolite). Saprolite is mostly thin (ranging
from non-existent to about 48 feet deep) and almost entirely unsaturated for
most portions of the Site.
• Transition Zone (D) — A relatively transmissive zone comprised mostly of
partially weathered rock that is gradational between saprolite and competent
bedrock.
• Bedrock Zone (BR) — The majority of water -producing fracture zones are found
within the top 50 feet of competent bedrock at Roxboro. In general, fracture
occurrence (providing sufficient yield for wells) diminishes with depth.
The following presents a generalized conceptual site model (CSM) for Roxboro ash
basins, which were constructed within former perennial stream valleys in the Piedmont
of North Carolina:
• Generally, the physical setting for ash basins within perennial stream valleys
limits the horizontal and vertical migration of constituents to areas near and
directly downgradient of the basin dams and dikes.
• The groundwater flow paths (the area of potential constituent migration in
groundwater from the basins) remain in the basin's stream valley system.
• Topographic ridges located in areas upgradient and side -gradient of the basins
reflect groundwater divides.
• The Intake Canal and Plant wastewater features downgradient from the dams
are groundwater discharge zones that limit the horizontal migration of
constituents downgradient of the basins.
• The migration of ash pore water to the underlying groundwater near the dams is
the primary mechanism for constituent transport.
• Ash pore water is present as wastewater within the ash basins.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
• Boron is the CCR constituent most indicative of COI migration from the ash
basins with a discernable plume pattern. Other less mobile metals such as cobalt
and selenium, (if detected in groundwater), might be present within the area of
the boron or sulfate plumes but to a lesser extent.
• Exceptions to the typical groundwater flow pathway constrained by the basin
hydrogeology occurs in areas where other sources could contribute to the
groundwater system.
The ash basins are flow -through systems with groundwater discharging into the
upgradient ends, flowing laterally through the central portions and migrating
downward in the vicinity of the ash basin dams, then flowing upward downstream
from the dams toward site surface water features. This flow system, along with the
stratified nature of the fly ash and bottom ash in the basin, results in limited downward
vertical migration of COIs into the underlying groundwater upstream from the dams.
In the vicinity of the dams, groundwater flows downward from the basins and under
the dams. Beyond the dams, groundwater flows upward, limiting downward
migrations of COIs to area near the dams. Boron is the CCR constituent most indicative
of groundwater migration from the ash basins with a discernable plume pattern.
Monitoring wells are installed to monitor ash pore water and surficial, transition, and
bedrock groundwater flow zones as part of the ongoing ash basin assessment and
monitoring activities. Figure 1-2 illustrates the locations of the CAMA monitoring well
network with respect to the EAB, WAB, and pertinent Site infrastructure. Monitoring
wells installed as part of other regulatory programs are also included on the figure for
completeness. Table 1-1 is a well construction table of CAMA monitoring wells
included in the IMP.
1.6 Previous Reporting
Detailed descriptions of the Site operational history, the CSM, physical setting and
features, geology/hydrogeology, and results of the findings of CAMA-related work are
documented in the following reports:
• Comprehensive Site Assessment Report - Roxboro Steam Electric Plant (SynTerra,
2015a).
• Corrective Action Plan Part 1 - Roxboro Steam Electric Plant (SynTerra, 2015b).
• Corrective Action Plan Part 2 — Roxboro Steam Electric Plant (SynTerra, 2016a).
• Comprehensive Site Assessment Supplement 1— Roxboro Steam Electric Plant
(SynTerra, 2016b).
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
• Ash Basin Extension Impoundments and Discharge Canals Assessment Report
Roxboro Steam Electric Plant (SynTerra, 2017a).
• Gypsum Storage Area Structural Fill (CCB 003) Assessment Report — Roxboro Steam
Electric Plant (SynTerra, June 2017b).
• Comprehensive Site Assessment Update — Roxboro Steam Electric Plant (SynTerra,
2017c).
NCDEQ provided partial approval of background threshold values in a letter to Duke
Energy dated May 14, 2018 (Appendix A). Comparisons of data to BTVs in this report
are in reference to those approved values. BTVs will be further refined and updated in
2019.
In a letter dated May 7, 2018, NCDEQ indicated that assessment activities have been
sufficient to proceed with preparing a corrective action plan (CAP), but requested
additional investigation (e.g., groundwater to surface water migration) be conducted in
conjunction with preparation of a CAP.
This report provides an evaluation of the groundwater data collected during the 2018
calendar year. The following sections will present the 2018 CAMA monitoring data and
provide an integrated interpretation of site conditions and plume status.
1.7 Overview of Findings for 2018
Key findings of CAMA data for 2018 include:
• No imminent hazards to public health and safety have been identified.
• The EAB and WAB, are considered the primary sources of CCR-related
constituent concentrations in groundwater at the Site.
• Assessment work is ongoing to determine if the Gypsum Storage Area is a
distinct groundwater source.
• Groundwater flow is away from potential water supply receptors located
upgradient of the Site.
• The current distribution of COIs in groundwater at the Roxboro Plant are
contained within the Site.
• Based on review, the time versus concentration graphs and plume
isoconcentration maps provided herein, the COI plumes beneath the ash basins
are stable and no significant changes have been observed.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
• The ash basins are flow -through systems with groundwater migration into the
upgradient ends as recharge. Groundwater flows laterally through the basins
with downward migration in the vicinity of the peripheral dikes and basin dams.
Upward vertical gradients occur downstream of the dams and dikes in the
vicinity of receiving water bodies (groundwater discharge areas). This limits
downward vertical migration of COIs to the areas in close proximity to the dams
and dikes.
• Boron is the key indicator of plume characteristics associated with the ash basins.
Additional COIs identified as having concentrations greater than their respective
groundwater standards and background threshold values are generally defined
within the extent of the boron plume at the Site.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
2.0 2018 MONITORING ACTIVITIES
2.1 2018 Quarterly Sampling Schedule
The CAMA IMP monitoring well network was sampled quarterly during 2018. New
wells indicated in Section 2.2, installed during the year, were added to the IMP and will
be sampled quarterly until four sampling events have occurred. After four events, the
data will be evaluated to determine the appropriate monitoring frequency and revision
to the IMP if applicable. Sampling events occurred in accordance with the IMP
schedule on the following dates:
• Quarter 1 January 23 through 25; and January 29 through February 1, 2018
• Quarter 2 April 9 through 12, 2018
• Quarter 3 July 25 through 27; July 30 and 31; and September 6, 2018
• Quarter 4 November 12 through 16, 2018
Groundwater sampling was performed by technical personnel from Duke Energy or
subcontracted by Duke Energy. Comprehensive data submittals to NCDEQ occurred
on a monthly basis in 2018 until a quarterly submittal schedule was approved by
NCDEQ (June 6, 2018 email to Duke Energy), in accordance with the following
schedule:
• Monthly: January through July 2018
• Quarterly: Quarter 3 October 2018
Quarter 4 February 2019
2.2 Changes to the CAMA Groundwater Monitoring Network
Four CAMA monitoring wells were abandoned at the Site in 2018. Four new
monitoring well installations occurred including two replacement wells and two new
wells at a previously unassessed area. The new wells were added to the quarterly IMP
monitoring schedule as they were determined to be complete and viable for the CAMA
program.
Wells Abandoned during 2018
• GMW-8 Analytical results not consistent with nearby wells; limited
well construction documentation available to assess
• MW-21BRL Low yield monitoring well designated as a piezometer
• ABMW-04 Removed due to location within the limits of landfill partial
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closure and leachate reroute
• ABMW-04BR Removed due to location within the limits of landfill partial
closure and leachate reroute
Wells Installed during 2018
• CCR-113D/-113BR Two -well cluster at the northern property
boundary to evaluate water quality and hydrogeologic
characteristics across the Intake Canal
• GMW-8R Replacement well for GMW-8
• MW-21BRLR Replacement well for MW-21BRL
Monitoring well GMW-8R is a dual-purpose well incorporated in the IMP and
permitted industrial landfill compliance monitoring networks. Monitoring wells CCR-
113D/-113BR are dual-purpose incorporated in both the IMP and CCR groundwater
monitoring networks. 2018 well installation and abandonment documentation are
included in Appendix B. Well locations are shown on Figure 1-2.
2.3 Water Level Measurements
During each 2018 quarterly IMP sampling event, water levels were measured for the
CAMA monitoring well network. Groundwater level maps of monitored flow zones
were prepared based on the November 2018 sampling event as discussed in Section 3.1.
This information was used to refine the groundwater flow direction and rate. Water
levels were recorded during a 24-hour period (prior to well purging and sampling)
using an electric water level indicator and referenced to a surveyed top -of -casing mark.
USEPA CCR Rule compliance monitoring well water level data are generally not
included in data evaluations for 2018 because water levels from the wells were not
collected during the 24-hour period in which CAMA IMP water levels were collected.
As of Quarter 12019, Duke Energy has implemented an optimized program that
includes selected CCR wells to provide better water level data coverage across the Site.
Groundwater elevations calculated from water levels measured during each quarterly
2018 IMP sampling event are presented in Table 2-1. Groundwater flow direction and
velocity are discussed in Section 3.1. A copy of the quarterly water level measurements
from the CAMA monitoring well network is included in Appendix B.
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2.4 Groundwater Sampling Methods
Field personnel conducted groundwater sampling following procedures outlined in the
NCDEQ-approved Low Flow Sampling Plan, Duke Energy Facilities, Ash Basin Groundwater
Assessment Program, North Carolina, June 10, 2015. Groundwater sampling using low
flow methods helps to reduce agitation during sampling, resulting in lower sample
turbidity. A copy of the Low Flow Sampling Plan is included in Appendix C.
Field personnel measured and recorded groundwater quality field parameters during
the monitoring well purging process. The field parameters included the following: pH,
specific conductivity, temperature, dissolved oxygen, oxygen -reduction potential, and
turbidity.
Upon collection of a groundwater sample, the chain of custody (COC) was updated and
kept with the respective samples. The sample bottles were packed on ice and chilled to
approximately 4 degrees Celsius (°C). The sample coolers and accompanying COCs
were shipped to the analytical laboratory by overnight express courier. Copies of
sampling logs and 24-hour water level data sheets are included in Appendix B.
2.5 Laboratory Analyses
The groundwater samples were analyzed for the parameters listed in the IMPS at the
time of collection (Appendix A). NC Certified laboratories performed groundwater
quality analyses for selected constituents. GEL Laboratories performed the radiological
analyses on the groundwater samples.
2.6 Quality Control Summary (Data Validation)
Data review and validation is conducted for CAMA analytical results. Data review is a
systematic process for evaluation of data against a predefined set of criteria to provide
assurance that the data meet project analytical Data Quality Objective (DQO)
requirements. The purpose of the data review process is to evaluate whether the
usability of analytical data is affected by the overall analytical processes and sample
collection and handling procedures. If specific analytical DQOs are not met, the data
are qualified (i.e., data flags are assigned to sample results) in accordance with
guidelines established by the U.S. Environmental Protection Agency (USEPA). Data
review allows the data user to adequately determine whether the data can be used for
its intended purpose. The data acceptance criteria are established according to Standard
Operating Procedures and Statements of Work provided to the contracted analytical
laboratory.
Upon receipt of the groundwater analytical data from the respective laboratories, the
data is uploaded into the project -specific database. SynTerra performs independent
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quality control checks of field and laboratory procedures that are used in collecting and
analyzing the data. The steps and guidelines followed during the data validation
process are modeled on the USEPA Contract Laboratory Program National Functional
Guidelines for Organic Superfund Methods Data Review (USEPA, January 2017a),
USEPA Contract Laboratory Program National Functional Guidelines for Inorganic
Superfund Methods Data Review (USEPA, January 2017b), Multi -Agency Radiological
Laboratory Analytical Protocols Manual (MARLAP), Manual Volume I: Chapter 8,
Radiochemical Data Verification and Validation (MARLAP, July 2004), and Data
Validation Standard Operating Procedures for Contract Laboratory Program Routine
Analytical Services Inorganic Analysis (USEPA, September 2011). In addition, method -
specific criteria set forth in the compendium of analytical methods found in the Test
Methods for Evaluation Solid Waste; Physical/Chemical Methods (SW-846), Update VI
(USEPA, November 2017 [Phase I] and July 2018 [Phase II]) are also evaluated during
the validation process. This data review process has been adapted to meet the
analytical DQO requirements for generation of definitive critical data.
Quality control checks verify that the data collected are of appropriate quality for the
intended data use and that the analytical DQOs are met. Thus, all data determined to
be useable should be considered compliant and adequate for its intended use of
monitoring water quality at the Site.
Data validation checklists that were completed for each laboratory package, by quarter,
are presented in Appendix D.
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3.0 2018 MONITORING RESULTS
3.1 Site -Wide Groundwater Occurrence and Flow
No significant changes in water levels or groundwater flow directions for the EAB and
WAB are noted in the fourth quarter 2018 groundwater elevation data compared to
previous measurements dating back to 2015. The findings are consistent with prior
assessment and monitoring date for Roxboro.
Monitoring well locations are shown on Figure 1-2. Water level elevations for the
CAMA IMP monitoring in 2018 are summarized on Table 2-1. At Roxboro, sufficiently
saturated regolith (shallow/surficial flow zone) was observed in limited areas nearest to
permitted Plant wastewater treatment system water features and Hyco Reservoir.
Saturated conditions are typically observed in the bedrock flow zone and, to a lesser
extent, in the transition zone, depending on topographical location at the Site. Due to
the limited and inconsistent occurrence of saturated conditions in the shallow/surficial
flow zone, water level evaluations pertaining to that zone were not made.
Water level maps for the transition/bedrock monitoring zone were constructed from the
most recent groundwater elevations obtained in November 2018 (Figure 3-1 [EAB area]
and Figure 3-2 [WAB area]). Groundwater elevations at Roxboro range from
approximately 520 ft (NVAD 88) in upland areas to approximately 410 ft at areas
adjacent to the heated water discharge pond and Hyco Reservoir. Where there are
saturated conditions in either regolith/saprolite or the transition zone, differences
between groundwater elevations in the wells completed in those zones (as compared
with elevations in adjacent bedrock wells) are not significantly different. Therefore, it is
appropriate to combine the transition zone and bedrock flow zones into one generalized
groundwater flow map. Well hydrographs (Figure 3-3) depict consistent groundwater
elevations in the transition and bedrock flow zones across the Site throughout the four
quarters of monitoring.
Figures 3-4 and 3-5 are plan -view velocity vector maps for groundwater in the
transition and bedrock flow zones throughout the Site. Figure 3-6 shows a cross-section
velocity vector map oriented approximately southeast to northwest through the EAB
and WAB dam. These maps were created from comprehensive Site data incorporated
into the flow and transport model. Black arrows illustrate the direction and magnitude
of groundwater flow at thousands of individual modeled locations. Various colors
illustrate relative flow velocities in feet per day (ft/day). These figures provide
additional support in understanding groundwater flow throughout the Site in three
dimensions. Key conclusions from evaluation of these figures include:
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• Velocity vector maps (Figures 3-4 and 3-5) generally align with groundwater
flow directions throughout the Roxboro Site inferred from water level maps
(Figures 3-1 and 3-2).
• Groundwater flow velocities are generally higher beneath and immediately
downgradient of the basin dams.
• Groundwater flow velocities along the cross-section (Figure 3-6) are lower within
and beneath the WAB and greatest beneath the WAB main dam. These
observations indicate groundwater flow and transport is limited within and
beneath the basin. The dam acts as a barrier to shallow groundwater flow and
transport. Groundwater flows downward beneath the WAB dam and upward
downstream of the dam, near the discharge boundary (heated water discharge
pond).
3.1.1 East Ash Basin
Figure 3-1 illustrates the groundwater levels of the transition and bedrock zones
in the vicinity of the EAB. Groundwater flow directions can be inferred from the
water level contours shown on Figure 3-1. General cross -sections A -A' and B-B'
are presented as Figures 3-7 and 3-8. These two cross -sections illustrate the
subsurface hydrogeology in the vicinity of the EAB. Section A -A' (Figure 3-7)
illustrates subsurface conditions at the EAB from residential properties on
Dunnaway Road to the south, across the ash landfill and Gypsum Storage Area,
and downgradient to the Intake Canal in the north. Section B-B' (Figure 3-8)
illustrates subsurface conditions at the EAB and industrial landfill in relation to
the residential properties along Johnson Lane, located upgradient of the EAB.
Detailed observations concerning groundwater flow in the vicinity of the EAB
include the following:
• Groundwater generally flows from the EAB to the north, beneath the
Gypsum Storage and DFA handling areas, toward the Intake Canal (Hyco
Reservoir).
• Groundwater flow into the EAB comes from upland areas to the southeast
and east of the basin.
• An upward vertical gradient occurs at the upland edge of the ash basin.
• Horizontal flow primarily occurs within the EAB.
• Downward vertical gradients occur in the vicinity of the ash basin dam.
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• An upward vertical gradient occurs downstream of the EAB main dam
(Figure 3-6).
The data illustrated on the cross -sections representing groundwater flow and
COI distribution support prior findings pertaining to the Site.
3.1.2 West Ash Basin
Figure 3-2 illustrates the groundwater levels of the transition and bedrock zones
in the vicinity of the WAB. General groundwater flow directions can be inferred
from the water level contours illustrated on the figure. Figures 3-9 and 3-10
present general cross -sections C-C' and D-D'. These two cross -sections illustrate
the subsurface hydrogeology in the vicinity of the WAB. Section C-C' (Figure 3-
9) illustrates subsurface conditions at the WAB from the upgradient area in the
south to the downgradient area in the north (Roxboro Plant). Section D-D'
(Figure 3-10) illustrates subsurface conditions at the WAB from the upgradient
extension impoundment and filter dike to the downgradient area in the north
(WAB main dam and heated water discharge pond). Detailed observations
concerning groundwater flow in the vicinity of the WAB include the following:
• For the northern portion of the WAB, groundwater flows northward
toward the heated water discharge pond.
• In the southern and western portions of the WAB, local groundwater
flows to the western discharge canal, which ultimately flows northward to
the heated water discharge pond.
• Elevated topography to the west of the WAB creates a groundwater
divide. To the west of the divide, groundwater flows to Hyco Reservoir.
To the east of the divide, groundwater flows toward the western
discharge canal and WAB.
• Horizontal flow primarily occurs within the WAB (Figure 3-6).
• Downward vertical gradients occur at the ash basin dam.
• An upward vertical gradient occurs downstream of the WAB main dam
(Figure 3-6).
The data illustrated on the cross -sections representing groundwater flow and
COI distribution support the prior finding at the Site.
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3.1.3 Horizontal Gradients
Horizontal hydraulic gradients were derived for the transition and bedrock flow
zones using November 2018 water level measurements. Those gradients were
derived by calculating the difference in hydraulic head over the length of an
inferred flow path between two water level contour intervals within the same
flow zone (Table 3-1). The following equation was used to calculate horizontal
hydraulic gradients:
= dh / dl
Where i is the hydraulic gradient; dh is the difference between two hydraulic
heads (measured in feet); and dl is the flow path length between the two water
level contours within the same flow zone (measured in feet).
Applying this equation along generalized groundwater flow paths observed at
the Site, using generalized elevation contours from Figures 3-1 and 3-2, yields an
average horizontal hydraulic gradient for the combined transition/bedrock flow
zone of 0.02 feet/foot.
3.1.4 Vertical Gradients
Groundwater elevations from the fourth quarter 2018 were used in this
evaluation. The vertical hydraulic gradient (dh/dl) is calculated at clustered wells
from the water level data and the midpoint elevations of the well screens.
Overall, the magnitude and direction of vertical gradients observed at Roxboro
are similar to those presented in previous CSA reports (SynTerra, 2016b and
2017c).
Figure 3-6 illustrates groundwater velocity vectors and magnitude on cross -
sections oriented south to north through the EAB (B-B') and WAB (D-D'). The
vertical gradients illustrated on well hydrographs (Figure 3-3) and determined
from flow and transport modeling (Figure 3-6) support the assumptions of the
CSM. In general, an upward vertical gradient under the basins near former
stream valleys has been observed. This upward gradient acts to prevent
downward vertical migration of constituents under the basins. Near
impoundment features such as dams or dikes, the gradient from ash pore water
to groundwater is downward.
East Ash Basin
Within the EAB, a downward vertical gradient occurred at well cluster GMW-8R
and MW-21BRLR, which is located south of the Industrial Landfill. A small
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upward vertical gradient was observed between the EAB and the Gypsum
Storage Area (MW-22D/-22BR). Farther to the north (downgradient direction
from the EAB and the Gypsum Storage Area), the vertical hydraulic gradient
from transition zone well GPMW-02D and bedrock zone well GPMW-02BR was
downward. A downward vertical gradient between the transition and bedrock
zones (Table 3-2) was noted as existing at the well cluster location CCR-113D/-
113BR, which is north of the Intake Canal.
Upgradient, to the east of the EAB, a downward vertical gradient was observed
at well cluster MW-17BR/-24BR (Figure 3-3), which is consistent with recharge
effects in upland areas of the EAB.
West Ash Basin
Within the WAB, pore water flow within stratified ash is generally horizontal
with a small downward component. Upward vertical gradients in the bedrock
beneath the ash basin limit the downward transport of constituents. This is
observed between the ash pore water and bedrock flow zone cluster ABMW-02/-
02BR, where a small upward hydraulic gradient is observed. Farther to the
north, at well cluster ABMW-01/-01BR, a downward vertical gradient occurs.
Groundwater in the upper and lower bedrock flow zone in the vicinity of the
WAB dam migrates underneath the dam discharging upward to the heated
water discharge pond. At the WAB dam, a strong downward gradient occurred
at the three -well cluster ABMW-03/-03BR/-03BRL between the ash and bedrock
and between the ash and lower bedrock (Table 3-2). The water level elevations at
this three well cluster are plotted on a well hydrograph to illustrate the
differences between the flow zones in this area of the Site (Figure 3-3). These
findings are consistent with those from the CSA Update (SynTerra, 2017c).
Northeast of the WAB main dam, an upward gradient was observed in the
transition flow zone between wells CW-05 and MW-05D. However, a strong
downward gradient occurred between the transition and bedrock flow zones
(MW-05D and MW-05BR, Table 3-2 and Figure 3-3).
Upgradient of the WAB, a downward vertical gradient was observed at well
clusters BG-01BR/-2BR and BG-01BRLR/BG-1BLR (Figure 3-3), which is
indicative of recharge effects in the upland areas of the WAB.
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3.1.5 Groundwater Seepage Velocity
Groundwater seepage velocities are calculated using horizontal hydraulic
gradients determined from water level measurements collected in November
2018 (Table 2-1). Hydraulic conductivity and effective porosity values are taken
from the revised flow and transport model (Murdoch and others, 2019). The
calibrated conductivity and porosity values for each flow zone were used in the
predictive modeling.
As presented in the November 2018 Updated Flow and Transport Model are:
Hydraulic conductivities (k):
• Transition zone 1 ft/day, and
• Bedrock zone 0.3 ft/day.
Effective porosity (ne):
• Transition zone 20 percent
• Bedrock zone 5 percent
The horizontal groundwater seepage velocity (vs) is estimated using a modified
form of the Darcy Equation.
k dh
VS _ ne (dl�
During the November 2018 /fourth quarter sampling event, horizontal
groundwater flow velocity in the vicinity of the ash basins is calculated to be:
• Transition zone 0.09 ft/day (33 ft/yr)
• Bedrock zone 0.11 ft/day (40 ft/yr)
These groundwater velocities are averages for flow across the Site and are within
the magnitude ranges for the velocities illustrated on Figures 3-4 through 3-6.
3.2 Data Reduction and Evaluation
Groundwater samples from the CAMA monitoring well network were analyzed for the
constituents listed on the quarterly IMP approval letters (Appendix A). The analytical
results from each sampling event in 2018 are summarized on Table 3-3. Data qualifiers
and acronyms specific to the data table are summarized and defined on Table 3-4.
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Laboratory analytical reports and accompanying data validation checklists are
presented in Appendix D.
One well, MW-33BR, exhibited elevated pH; therefore, data from this well was
excluded from the evaluation. No other outliers were identified in the 2018 dataset
presented on Table 3-5.
The geomean of sampling results for the 2018 CAMA data was calculated for each
identified COI to support the analysis of groundwater conditions and provide a basis
for defining the extent of the plume in 2018. The geomean method was selected in
order to capture the central tendency of the data, which might vary over several orders
of magnitude. If four quarters of valid data were not available, the most recent valid
sample result was reported. Four quarters of valid data were not available because
either the well was recently installed, in a construction area with restricted access (e.g.,
MW-6 D/BR), or sample results from one quarter were excluded. For use in calculating
geomeans, non -detect values were assigned the lab detection limit, and estimated (J-
flag) values were treated as the value reported.
Based on USEPA's National Functional Guidelines (USEPA, 2017a, 2017b), published
research upon the leaching behavior of elements from coal combustion fly ash
(Izquierdo, and others 2012), and professional judgement, sample results were excluded
from calculations for the following conditions:
• turbidity was greater than 10 Nephelometric Turbidity Units (NTUs)
• pH was greater than 10 standard units (S.U.) (for antimony, arsenic,
molybdenum, selenium, and vanadium only)
• if the data was flagged as unusable (RO qualified)
• if the data was non -detect at a reporting limit greater than the normal laboratory
reporting limit
Table 3-5 presents the calculated geomeans of the quarterly COI data. The grey
highlighting in the table illustrates which reported values are not calculated geomeans.
When geomeans could not be calculated, the most recent valid sample was evaluated to
determine whether the sample result is an appropriate representation of the historical
dataset. Sample results with COI concentrations significantly greater or lesser than the
historical average concentration were identified as outliers.
Geomeans are used to evaluate the occurrence of COIs at the Site. A single sample
result may not be an accurate representation of the concentrations observed over four
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quarters of data in 2018. Evaluating plume geometries with geomeans limits the
occurrence of isolated COIs at concentrations greater than enforceable groundwater
standards. Previous site assessments have identified these isolated areas as not
impacted by the ash basins and provided evidence based on groundwater flow
direction and other constituent migration patterns (SynTerra, 2017c).
Data from CCR groundwater monitoring wells are used for evaluating plume
geometry. Data from CCR wells is used in this report on isoconcentration figures for a
complete evaluation of COI occurrence in the vicinity of the ash basins. These figures
are discussed in Sections 3.3 and 3.4 of this report.
The BTVs, 02L standard, and or IMAC for each COI are summarized by flow layer at
the top of Table 3-3. Text, figures, and tables in this report reflect the updated BTVs
approved by NCDEQ in 2018 per 15A NCAC 02L .0202(b)(3), site -specific BTVs
calculated at concentrations greater than 02L standards or IMACs are the enforceable
groundwater standards.
Table 3-6 is a summary of an evaluation of COIs at the Site. The COI list from the 2017
CSA Update was evaluated to determine which COIs effectively define the plume in the
vicinity of the WAB and EAB. Table 3-6 provides the following information:
• Applicable comparison criteria (02L standard, IMAC, or approved BTVs).
• Maximum 2018 geomean concentration near or outside compliance boundary.
• Exceedance ratio of the maximum geomean divided by the comparison criteria
value.
• The number of wells with concentrations greater than criterion near or outside of
the compliance boundary.
• Rationale for not including specific COIs in isoconcentration figures or time -
series plots.
Constituents that are detected near or beyond the compliance boundary at exceedance
ratios greater than one are appropriate for defining plume geometry. A discernable
plume cannot be defined for COIs that do not exceed comparative criteria in
saprolite/transition and bedrock flow zones. For the purposes of monitoring
groundwater quality Site -wide, boron and sulfate provide a good indication of the
occurrence and distribution of CCR-related COIs. TDS provides a representation of all
dissolved solids, including non -target constituents, and further discerns the plume
configuration. COIs other than these also occur at concentrations greater than their
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respective screening criterion but are contained within the boron, sulfate, or TDS
plumes and do not change overall plume geometry at the Site.
COIs are those parameters with concentrations greater than groundwater screening
criteria (02L standard, IMAC, or BTVs. COIs that meet the following criteria may be
designated for future corrective action:
1) Occur downgradient of an ash basin in the direction of groundwater flow;
2) Exhibits concentrations in groundwater at or beyond the compliance boundary
greater than the 02L standard, IMAC, or approved BTVs, whichever is greater;
3) Exhibits high to variable mobility (exhibit a discernable plume); and
4) Demonstrate correlation with other soluble constituents associated with coal ash.
Based on the criteria above, the following groundwater COIs are anticipated to be
evaluated in the CAP Update:
Boron Cobalt Manganese
Strontium Sulfate Total Dissolved Solids
The groundwater COIs identified at Roxboro occur in CCRs and are also naturally
occurring in groundwater. Certain COIs (e.g., cobalt, manganese, and TDS) have
background concentrations in some flow zones at the Site greater than their 02L
standard or IMAC. The 2017 CSA Update used provisional BTVs (PBTVs) for
comparison. NCDEQ approved BTVs for Roxboro groundwater with the exception of
aluminum (transition flow zone) and sulfate (bedrock flow zone) in a letter to Duke
Energy dated May 14, 2018. The BTVs, 02L standard, and/or IMAC for each COI are
summarized by flow layer at the top of Table 3-3. Text, figures, and tables in this report
reflect the updated BTVs approved by NCDEQ in 2018. Per 15A NCAC 02L .0202(b)(3),
Site -specific BTVs calculated at concentrations greater than 02L standards or IMACs are
the enforceable groundwater standards. The BTVs for the Site are anticipated to be
updated and included in the 2019 CAP Update.
Table 3-7 provides a summary of background threshold values calculated for the Site
COIs as defined in the 2017 CSA Update. The table includes the approved BTVs.
BTVs are statistically derived upper tolerance limits (UTLs). The UTL represents an
upper limit of a range of values in which a specified proportion of the data population
resides with some level of statistical confidence. Concentrations observed in upgradient
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wells at the Site may exceed BTVs but still be within the range of typical background
concentration in the North Carolina Piedmont. Table 3-7 includes constituent
concentration ranges detected in background wells at Roxboro and regional
concentration ranges detected in background wells in the six Duke Energy facilities
located in the North Carolina Piedmont.
Isoconcentration maps depicting the distributions of boron, sulfate, and TDS in the
saprolite/transition and bedrock flow zones are provided as Figures 3-11 through 3-16
and discussed in Sections 3.3.2 and 3.4.2. For completeness, the most recent analytical
results from other monitoring programs (CCR Rule and Solid Waste Landfill [SWLF]
compliance) are posted on the isoconcentration maps.
Isoconcentration maps and time series plots for selected constituents are the basis of
evaluation of plume geometry and concentration trends for each source area described
in Sections 3.3 and 3.4. As a result, several COIs (boron, sulfate, and TDS) were selected
for creating isoconcentration maps because:
• These COIs are frequently detected at concentrations greater than 02L standards,
IMACs, or BTVs downgradient of the ash basins.
• Boron, sulfate, and TDS are relatively mobile in groundwater, as compared with
other COIs. Sulfate tends to be co -located and positively correlated with boron.
Boron, sulfate, and TDS can, therefore, provide an indication of the areal extent
of CCR-related COIs in groundwater at the Site.
• Cobalt and manganese are both geochemically reactive constituents with a
potential for sub -surface transport (i.e., mobility determined by laboratory and
modeled sorption coefficients) which varies orders of magnitude over the range
of redox and pH conditions observed at the Site. Additionally, a study conducted
by Polizzotto and others (2015) found that roughly 50 percent of wells in North
Carolina have manganese concentrations greater than the 2L Standard (50 µg/L).
This same report noted that manganese in NC is naturally sourced. Cobalt is
known to naturally associate with manganese minerals in the Southeastern
United States (Pierce, 1944). Given the geochemically reactive nature of cobalt
and manganese and their known prevalence in the Piedmont Region of NC, they
are not suitable constituents for evaluation of plume geometry.
Time -series graphs for wells located within and at the leading edge of the source area
plumes were produced to provide an ongoing evaluation of change in water quality
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through time (Figures 3-17 through 3-20). COIs selected for time -series evaluations
include the following:
• Boron
• Cobalt
• Manganese
• Sulfate
Calculated geomeans of boron, sulfate, and TDS from the four quarterly sampling
events of 2018 are posted at the screen intervals of wells illustrated on the General
Cross -Sections (Figures 3-7 through 3-10). Isoconcentration maps depicting the
distributions of boron, sulfate, and TDS in the saprolite/transition and bedrock flow
zones across the Site are provided as Figures 3-11 through 3-16. Time -series plots
presenting historic concentrations of boron, cobalt, manganese, and sulfate at select
monitoring wells within and downgradient of the EAB and WAB are provided as
Figures 3-17 through 3-19. These data are discussed in Sections 3.3.2 and 3.4.2 below.
3.3 East Ash Basin Water Quality
3.3.1 Site Conditions
By 1983, hydraulic sluicing to the EAB was discontinued. The spillway remained
open so that water could continue to flow out of the EAB to the plant's Intake
Canal. In 1986, Duke Energy began construction on the industrial landfill, which
was primarily located within the waste boundary of the EAB. An earthen
separator dike on the EAB formed a barrier separating the EAB from the
discharge canal and a portion of the former basin.
The industrial landfill became operational in 1988, when DFA was deposited
within the permitted non -synthetic lined waste boundary. Subsequent
engineered synthetic lined phases were constructed over the initial disposal area
with operations beginning in 2004. CCR at the Site is managed in the engineered
synthetic lined phases of the landfill or transported off -Site for beneficial reuse.
The construction of the synthetic lined phases greatly reduces, or eliminates,
surface water infiltration into areas of the EAB covered by those phases of the
landfill. An engineered synthetic cap over a portion of the non -synthetic lined
landfill area outside of the synthetic lined phases (halo area) began construction
in 2018. The halo area synthetic cap installation will reduce or eliminate surface
water infiltration in those areas.
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Groundwater flow beneath the EAB tends to be horizontal with no substantial
downward vertical gradient. The main dam and separator dike, however, tend
to create a downward vertical migration of groundwater into the underlying
flow zones due to elevated hydraulic heads within the basin. Downgradient of
these structures, however, an upward gradient tends to limit constituent
migration in the deeper bedrock.
3.3.2 Constituent Occurrence and Plume Status
The geomeans of four quarters of boron, sulfate, and TDS data in 2018 were used
to evaluate COIs in groundwater (Table 3-6). Boron is used to delineate the
groundwater plume related to the ash basin because it is considered an indicator
constituent for groundwater influence from CCR. Calculated geomeans of
boron, sulfate and TDS from the four quarterly sampling events in 2018 are
posted at the well screen intervals on cross -sections A -A' and B-B' (Figures 3-7
and 3-8). Data from CCR Rule compliance wells, which are not included in the
2018 IMP, are also posted on the Figures 3-11 through 3-16 for completeness.
Boron
Figures 3-11 and 3-12 are isoconcentration maps illustrating the occurrence of
boron in the saprolite/transition and bedrock flow zones beneath the Site. Boron
results for ash pore water wells are included on saprolite/transition
isoconcentration figure (Figure 3-11) for source concentration reference only.
Observations about boron distribution in groundwater at the EAB include the
following:
• Findings are consistent with prior assessment and monitoring data
presented in the 2017 CSA Update.
• Boron concentrations within ash pore water and groundwater have
remained relatively consistent over time (Figures 3-17).
• Boron is detected in all ash pore water wells sampled in the EAB
• Boron is not detected in the upper bedrock flow zone beneath the ash
basins upgradient of the dam indicating downward vertical migration of
COIs is limited beneath the EAB. Owing to a thin to non-existent
saprolite/transition zone layer below the EAB, the upper bedrock flow
zone is the most proximate flow layer below the ash basins.
• Boron is detected at concentrations greater than the 02Lstandard in the
upper bedrock near the dam. Boron is not detected at concentrations
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greater than the 02L standard in accompanying deep bedrock wells.
Consistent with the CSM, a downward vertical hydraulic gradient is
observed in the vicinity of the EAB main dam. Beyond the dam, an
upward vertical hydraulic gradient in observed, limiting downward
migration of COIs to the area in close proximity to the dam. This is
supported by the cross-section velocity vector flow map presented on
Figure 3-6.
• The concentration of boron is low to non -detect in groundwater
upgradient of the EAB.
• Boron plume geometry for the saprolite/transition and bedrock flow zones
cover a similar areal extent with the leading edge of the boron plume
adequately defined.
• Consistent with the results of the updated CSM, plume migration is
towards the EAB main dam and subsequent permitted Unit 3 wastewater
hot pond. Exceptions to this are observed along margins of the landfill,
associated with the non -synthetic lined area. This is supported by velocity
vector flow maps presented on Figures 3-4 and 3-5.
Sulfate
Figures 3-13 and 3-14 are isoconcentration maps illustrating the occurrence of
sulfate in ash pore water and the saprolite/transition and bedrock flow zone
beneath the Site. The following observations are made when considering the
distribution of sulfate:
• The areal extent of sulfate in groundwater at concentrations greater than
the 02L standard is approximately the extent of boron 02L exceedances,
with the exception of MW-22D in the area of the Gypsum Storage Area.
Total Dissolved Solids
Figures 3-15 and 3-16 show the areal distribution of TDS in the
saprolite/transition and bedrock flow zones beneath the Roxboro Site. The
following observations are made when considering the distribution of TDS:
• The areal extent of TDS is defined within the limits of boron. TDS
provides a representation of all dissolved solids, including non -target
constituents. Thus, increased TDS values in the absence of boron and
sulfates do not necessarily indicate Site -related COIs have affected
groundwater quality at a location.
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• Since TDS can also be representative of non -target constituents in
groundwater, its occurrence in the vicinity of the EAB is not unexpected.
TDS is more widespread in bedrock as compared with its occurrence in
the saprolite/transition zone in the vicinity of the EAB.
Time Series Plots - East Ash Basin
• Time -series graphs of boron, cobalt, manganese, and sulfate were
produced to provide an ongoing evaluation of changing water quality
through time for key monitoring wells near the EAB (Figure 3-17).
Monitoring well GMW-07 is located near the western edge of the EAB and
utilized as a dual-purpose monitoring well for both CAMA IMP and
landfill compliance monitoring. For this reason, GMW-07 is positioned
along the landfill waste boundary and well within the extent of the
CAMA compliance boundary. As illustrated on Figure 3-17, trends
associated with the historic and 2018 CAMA IMP are difficult to discern
with boron and sulfate. Manganese and cobalt are non -detect or near the
detection limits.
Monitoring well GMW-11 is located downgradient (north) of the EAB.
Groundwater quality data at this location shows that boron and sulfate
appear to have marginally increased over the historical range, however,
concentrations detected during quarterly 2018 IMP sampling appear to
show a slight downward trend. Cobalt and manganese are not detected
greater than the respective comparison criteria at this location.
• Monitoring well GMW-10 is located downgradient (north) of the EAB.
Groundwater quality data at this location shows that boron, sulfate,
cobalt, and manganese are not detected at concentrations greater than the
respective comparison criteria.
• Monitoring well ABMW-05D is located south of the EAB main dam within
the ash basin footprint. Groundwater quality data at this location shows
that concentrations of boron and manganese appear stable.
Concentrations of sulfate appear to be increasing but remain below the
02L standard.
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3.4 West Ash Basin Water Quality
3.4.1 Site Conditions
During 2018, the WAB received bottom ash via hydraulic sluicing. Groundwater
flow beneath the WAB tends to be horizontal with no substantial downward
vertical gradient. The main dam and peripheral dikes, however, tend to create a
downward vertical migration of groundwater into the underlying flow zones
due to elevated hydraulic heads within the basin. Downgradient of these
structures, however, an upward gradient tends to limit COI migration in the
deeper bedrock.
Decanting of the WAB will begin no later than June 30, 2019. COI migration in
groundwater beneath and downgradient of the basin is expected to decrease.
FGD technology was installed in 2008 to reduce SO2 emissions for all the steam
units. Three FGD ponds were constructed within the WAB footprint to support
treatment of the scrubber wastewater (Figure 1-2). The ponds are lined
impoundments constructed with an 18-inch compacted clay sub -base, 60-
millimeter low density polyethylene liner, and a heavy nonwoven geotextile
membrane. Therefore, they are not expected to contribute to COI loading within
the WAB.
In 2018, the WAB discharge canal received waste streams from various on -Site
sources, including: WAB effluent from bottom ash sluicing; EAB landfill leachate
drainage; storm water runoff; flow from the EAB, discharge from the FGD Pond
treatment process; cooling tower blowdown; domestic sewage treatment plant
discharge; and surface water runoff. Effluent from the WAB discharge canal
discharges into the heated water discharge pond, which ultimately flows into
Hyco Reservoir via NPDES Outfall 003.
3.4.2 Constituent Occurrence and Plume Status
The geomeans of 2018 IMP boron, sulfate, and TDS data were used to evaluate
COIs in groundwater (Table 3-5). Boron is used to delineate the groundwater
plume related to the ash basin because it is considered an indicator constituent
for groundwater influence from CCR. Calculated geomeans of boron, sulfate,
and TDS from 2018 CAMA sampling events are noted at the well screen intervals
on cross -sections C-C' and D-D' (Figures 3-9 and 3-10).
Boron
Figure 3-11 and 3-12 are isoconcentration maps illustrating the occurrence of
boron in the saprolite/transition and bedrock flow zones beneath the Site. Boron
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
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results for ash pore water wells are included on saprolite/transition
isoconcentration figure (Figure 3-11) for source concentration reference only.
Observations about boron distribution include:
• Findings are consistent with prior assessment and monitoring data
pertaining to the Site as provided in the 2017 CSA Update.
• Boron plume geometry for the saprolite/transition and bedrock flow zones
cover a similar areal extent with the leading edge of the boron plume
adequately defined.
• Consistent with the results of the updated CSM, plume migration is
towards the western discharge canal and the heated water discharge
pond. This is supported by velocity vector flow maps presented on Figure
3-4 and 3-5.
• Boron concentrations in saprolite/transition and bedrock flow zones
greater than the 02L standard indicate the plume is confined to a limited
area, predominately within the waste boundary. Boron is less than the 02L
standard in most other areas adjacent to the basin, with the exception of
an isolated area northeast of the main dam.
• Downstream from the dam, boron decreases in concentration and is non -
detect near the discharge to the heated water discharge pond (Figure 3-9).
• Boron is low to non -detect in groundwater upgradient of the WAB.
Sulfate
Figure 3-13 and 3-14 are isoconcentration maps illustrating the occurrence of
sulfate in the saprolite/transition and bedrock flow zone beneath the Site.
Observations about sulfate distribution include:
• Sulfate plume geometry for the saprolite/transition and bedrock flow
zones cover a similar areal extent compared with boron with the leading
edge of the sulfate plume adequately defined.
• The areal extent of sulfate greater than the 02L standard is less than that of
boron occurring within the waste boundary. As observed with boron
beneath the WAB, the highest concentrations of sulfate in groundwater
occur at the main dam and between the FGD ponds and the western
discharge canal.
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• Sulfate concentrations are less than the standard in most areas adjacent to
the basin.
Total Dissolved Solids
Figures 3-15 and 3-16 represent the areal distribution of TDS in the
saprolite/transition and bedrock flow zone beneath the Site. TDS in
groundwater, including non -target constituents. is consistent with boron and
sulfate (Figure 3-15). The occurrence of TDS in the bedrock flow zone is
illustrated on Figure 3-16.Observations about TDS distribution in groundwater
at the WAB include the following:
The areal extent of TDS concentrations considered greater than
background is defined within the limits of the boron plume. TDS
provides a representation of all dissolved solids, including non -target
constituents. Thus, increased TDS values in the absence of boron and
sulfates do not necessarily indicate Site -related COIs have affected
groundwater quality at a location.
• Since TDS can also be representative of non -target constituents in
groundwater, its occurrence in the vicinity of the WAB is not unexpected.
• TDS is more widespread in bedrock as compared with its occurrence in
the saprolite/transition zone in the vicinity of the EAB.
Time Series Plots - West Ash Basin
Time -series graphs of boron, cobalt, manganese, and sulfate for the WAB area are
provided on Figure 3-18 and Figure 3-19. Selected wells are located in
downgradient areas or at the leading edge of the ash basin plume and are key
locations to monitor plume stability.
Monitoring well MW-12BR is located within the compliance boundary to
the west of the WAB. Boron was not detected in groundwater at this
location. Sulfate and manganese are relatively stable; however, the
concentration of cobalt is increasing upon review of 2018 quarterly results
(Figure 3-18).
Monitoring well MW-02 is located north of the WAB dam within the
compliance boundary, between the dam and the heated water discharge
pond. As illustrated on Figure 3-18, boron concentrations are slightly
increasing in concentration over the historical period of record. Sulfate is
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
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also increasing in concentration but at a lower rate. Manganese and cobalt
concentrations appear stable.
Monitoring wells ABMW-03BR and ABMW-03BRL are located within the
footprint of the WAB waste boundary, near the main dam. In the upper
bedrock well (ABMW-03BR), boron, sulfate, manganese, and cobalt
appear relatively stable over the period of record. In the lower bedrock
well (ABMW-03BRL), the concentration of boron is decreasing, the sulfate
concentration is relatively stable, and the manganese concentration
exhibits no discernable trend. Boron, sulfate, manganese, and cobalt occur
at higher concentrations in upper bedrock relative to the lower bedrock.
• Monitoring wells CW-2 and CW-21) are located downgradient of the WAB
main dam just inside of the compliance boundary. Boron and cobalt have
not been detected above the reporting limit. The concentration of sulfate
exhibits a slight increasing trend in samples from both wells however
remains below the 02L standard. Manganese has been detected at a
concentration within the range of the approved BTV.
Monitoring wells MW-05D and MW-05BR are located downgradient of
the WAB main dam near the compliance boundary. Boron and sulfate
occur at higher concentrations in the transition flow zone than in the
bedrock zone. The concentration of manganese is decreasing significantly
in the transition zone while the bedrock flow zone appears stable. Cobalt
concentrations are detected within the range of BTV in both flow zones.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
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4.0 SUMMARY AND CONCLUSIONS
4.1 Groundwater Occurrence and Flow
A common finding from predictive groundwater flow and transport modeling is that
reducing the hydraulic head in the WAB through decanting will reduce the vertical and
horizontal hydraulic gradients that drive constituent migration, with the greatest
reduction near the dam.
The following are conclusions pertaining to groundwater flow beneath the Site:
• An upward vertical gradient is seen at the upland edge of the ash basins.
• Horizontal flow occurs primarily within the ash basins.
• Downward vertical gradients occur at the ash basin dams and dikes constructed
within basins.
• Upward vertical gradients occur beyond the dams near groundwater discharge
zones.
Groundwater level and quality data demonstrate that that COI transport is toward the
north/northwest. The CSM will continue to evolve and be updated to reflect new
information as it becomes available.
4.2 Groundwater Quality
The following are conclusions pertaining to groundwater quality beneath the Site based
on data available through 2018:
• Variably reactive constituents, such as cobalt and manganese, are not suitable for
delineating the groundwater plume geometry and COI migration.
• The groundwater quality data from the 2018 IMP and multiple years of
groundwater elevation and water quality data demonstrate that the COI plumes
associated with the ash basins are well-defined. COI transport at the Site is
largely to the north/northwest along the impounded former perennial stream
valleys, which limits the lateral migration of COIs.
• Boron concentration distributions adequately portray and bound CCR influence
on groundwater at the Site.
• Boron occurrence in the transition and bedrock flow zones confirm the
assumptions of the CSM.
• CCR-related COIs are delineated within the limits of the boron plume.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
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5.0 INTERIM MONITORING PLAN UPDATES
5.1 Optimization of the Monitoring Program
Duke Energy submitted an optimized IMP to NCDEQ on December 15, 2018. NCDEQ
approved the optimized IMP by email on December 21, 2018. The plan recommended
adjusting the well and water quality parameter lists to more efficiently monitor
groundwater conditions at the Site. After additional correspondence and discussion
with NCDEQ, Duke Energy submitted a revised optimized IMP on March 20, 2019. The
revised optimized IMP was approved on April 4, 2019 (Appendix E).
IMP analytical parameters were reduced to include the Site COI list and the federal
CCR Rule Appendix III and Appendix IV parameter lists beginning Quarter 1 of 2019. A
summary of the rationale for reducing the IMP well counts is provided below.
Wells critical to the IMP were identified in the following locations:
• Between CCR source areas and water supply wells
• Between CCR source areas and downgradient surface water bodies
• At the Site compliance boundary to verify plume stability
• At existing plume boundaries to detect plume expansion or contraction
• Along geochemical flow transects to monitor plume stability, support the
geochemical model, and confirm horizontal and vertical distribution trends
The optimized IMP well list is divided into quarterly and semiannual sampling
schedules. For 2019, Site wells are sampled in the following manner:
• Background wells - semiannually
• Peripheral monitoring wells - semiannually
• Wells along flow transect - semiannually
• Downgradient wells used in model simulations - semiannually
• Wells with increasing COI concentrations - quarterly
New wells installed as part of the CAMA program will be monitored quarterly for at
least four quarters for the full suite of CAMA parameters listed in the optimized IMP.
After four quarterly events, Duke Energy will re-evaluate the monitoring frequency
and/or parameter list for the new wells with NCDEQ concurrence and revise the IMP if
needed.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
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The data evaluation in this annual report confirms the IMP for 2019 is appropriate. No
additional changes to the IMP are recommended at this time. It is recommended that
sampling continue in accordance with the IMP.
5.2 2019 Monitoring and Reporting Schedule
Duke Energy will sample the monitoring well network on a quarterly and semiannual
basis during 2019 in accordance with the optimized IMP referenced above. New wells
installed throughout the year will be added to the monitoring network and IMP
quarterly sampling program. To maximize data available for evaluation in the CAP, an
initial sample is collected from new wells after development has been completed and
verified (i.e., turbidity <10 NTU 24 hours after development). Depending on timing of
initial sample collection, variances in quarterly sampling schedule may be requested to
avoid collection of auto -correlated data. The sampling events are planned to occur in
accordance with the following schedule:
• Quarter 1 (wells sampled quarterly) January 2019
• Quarter 2 (wells sampled semiannually and quarterly) April 2019
• Quarter 3 (wells sampled quarterly)
July 2019
• Quarter 4 (wells sampled semiannually and quarterly) October 2019
A quarterly, comprehensive data submittal to NCDEQ is scheduled for approximately
60 days after sampling in accordance with the following schedule:
• Quarter 1: March 2019
• Quarter 2: June 2019
• Quarter 3: September 2019
• Quarter 4: December 2019
(January 2019 data)
(April 2019 data)
(July 2019 data)
(October 2019 data)
Data from the IMP will help to refine and support groundwater quality, occurrence,
and flow evaluations pertaining to the Site.
The list of Site -specific COIs for inclusion into the CAPs is currently undergoing review
using the COI management approach presented to the NCDEQ on March 15, 2019. COIs
proposed for management under the CAP would be based on:
• Comparing constituent concentrations to regulatory standards and/or
background values
• Evaluating each constituent's relative mobility
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
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• Reviewing constituent distribution in groundwater based on geochemical
conditions
• Comparing each constituent's relative concentration observed in ash pore water
to the concentration observed in groundwater
• Evaluating constituent concentration trends over time
The results of this review will be presented in the CAP and may result in proposed
modifications to the monitoring program at that time.
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6.0 REFERENCES
Chu, J., Panzino, P., Bradley, L.J., DABT., 2017. An approach to using geochemical
analysis to evaluate the potential presence of coal ash constituents in drinking
water. 2017 World of Coal Ash Conference. Lexington, KY, May 9-11, 2017.
Daniel, C.C., III and Dahlen, P., 2002. Preliminary hydrogeologic assessment and study
plan for a regional ground -water resource investigation of the Blue Ridge and
Piedmont Provinces of North Carolina. U.S. Geological Survey; 2002:60.
Harned, D., and Daniel, C., 1992. The transition zone between bedrock and regolith:
Conduit for contamination. In Daniel, C.C., White, R., and Stone, P., eds.,
Groundwater in the Piedmont, Proceedings of a Conference on Ground Water in
the Piedmont of the Eastern United States, Charlotte, N.C., Oct. 16-18, 1989.
Clemson, SC: Clemson University (336-348).
Duke Energy, June 10, 2015. Low Flow Sampling Plan, Duke Energy Facilities, Ash
Basin Groundwater Assessment Program, North Carolina.
General Assembly of North Carolina, 2014. Coal Ash Management Act of 2014. Senate
Bill 729, Ratified Bill (Session 2013) (SB729).
Izquierdo, Maria and Querol, X., 2012. Leaching behaviour of elements from coal
combustion fly ash: an overview. International Journal of Coal Geology 94 (2012):
(pp. 54-66).
LeGrand, H. (1988). Region 21, Piedmont and Blue Ridge. In: J. Black, J. Rosenshein, P.
Seaber, ed. Geological Society of America, 0-2, (pp. 201-207).
LeGrand, H. (1989). A conceptual model of ground water settings in the Piedmont
region, in groundwater in the Piedmont. In: Daniel C., White, R., Stone, P., ed.
Ground Water in the Piedmont of the Eastern United States (pp. 317-327).
Clemson, SC: Clemson University.
LeGrand, H. E. 2004. A Master Conceptual Model for Hydrogeological Site
Characterization in the Piedmont and Mountain Region of North Carolina, A
Guidance Manual, North Carolina Department of Environment and Natural
Resources Division of Water Quality, Groundwater Section.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
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Multi -Agency Radiological Laboratory Analytical Protocols Manual (MARLAP), July
2004. MARLAP Manual Volume I: Chapter 8, Radiochemical Data Verification
and Validation.
Murdoch, L. C., Yu, R., Graziano, R., and Falta, R. W., January 2019. Preliminary
updated groundwater flow and transport modeling report for Roxboro Steam
Electric Plant, Semora, NC.
NCDEQ, 2017a. Guidelines for the Investigation and remediation of soil and
groundwater contamination, DEQ Division of Water Resources, 70 p.
NCDEQ, May 1, 2017. Correspondence to Duke Energy, Subject: Response to the
February 2, 2017 Letter from Duke Energy, Revised Interim Monitoring Plans for
14 Duke Energy Facilities.
NCDEQ, May 7, 2018. Correspondence to Duke Energy, Subject: 2017 Comprehensive
Site Assessment Update Comments - Roxboro Steam Electric Plant.
NCDEQ, September 28, 2018. Correspondence to Duke Energy, Subject: Revised Interim
Monitoring Plans for 14 Duke Energy Facilities, 4thQuarter 2018.
Pierce, W. G., 1944. Cobalt -bearing manganese deposits of Alabama, Georgia, and
Tennessee, in Strategic Minerals Investigations, 1943 (pp. 265-285). Washington
D.C.: United States Department of Interior -Geologic Survey.
Polizzotto, M., Amoozegar, A., Austin, R., Bolich, R., Bradley, P., Duckworth, O., &
Hesterberg, D., 2015. Surface and subsurface properties regulating manganese
contamination of groundwater in the North Carolina Piedmont. Raleigh, NO
UNC-WRRI.
Schaeffer, M. F., April 2014a. Piedmont groundwater system, Part 1 - The transition
zone between regolith and bedrock: Existence. Geological Society of America,
Abstracts with Program, 46 no. 3, 26-27.
Schaeffer, M. F., April 2014b. Piedmont groundwater system, Part 2 - The Transition
zone between regolith and bedrock: Characteristics. Geological Society of
America, Abstracts with Program, 46 no. 3, 27.
SynTerra, 2015a. Comprehensive site assessment report for Roxboro Steam Electric
Plant -1700 Dunnaway Road, Semora, NC, September 2, 2015.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
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SynTerra, 2015b. Corrective action plan, part 1 for Roxboro Steam Electric Plant -1700
Dunnaway Road, Semora, NC, December 1, 2015.
SynTerra, 2016a. Corrective action plan, part 2 for Roxboro Steam Electric Plant -1700
Dunnaway Road, Semora, NC, February 29,2016.
SynTerra, 2016b. Comprehensive site assessment, supplement 1 for Roxboro Steam
Electric Plant -1700 Dunnaway Road, Semora, NC, August 1, 2016.
SynTerra, 2017a. Ash basin extension impoundments and discharge canals assessment
report for Roxboro Steam Electric Plant, 1700 Dunnaway Road, Semora, NC, May
2017.
SynTerra, 2017b. Gypsum storage area structural fill (CCB 003) assessment report —
Roxboro Steam Electric Plant, June 2017.
SynTerra, 2017c. 2017 Comprehensive site assessment update for Roxboro Steam
Electric Plant -1700 Dunnaway Road, Semora, NC, October 31, 2017.
United States Environmental Protection Agency, November 2002, Guidance on
Environmental Data Verification and Data Validation.
United States Environmental Protection Agency, September 2011, Data Validation
Standard Operating Procedures for Contract Laboratory Program Routine
Analytical Services Inorganic Analysis.
United States Environmental Protection Agency, January 2017a. National Functional
Guidelines for Organic Superfund Methods Data Review.
United States Environmental Protection Agency, January 2017b. National Functional
Guidelines for Inorganic Superfund Methods Data Review.
United States Environmental Protection Agency, November 2018 (Phase I) and July
2018 (Phase II). Test Methods for Evaluating Solid Waste: Physical/Chemical
Methods (SW-846), Update VI.
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2018 CAMA Annual Interim Monitoring Report April 30, 2019
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FIGURES

0
EFFLUENT DISCHARGE
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NOTES
DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED
ON HISTORICAL DOCUMENTED PROPERTY BOUNDARIES AND
CURRENT PERSON COUNTY GIS. DUKE ENERGY IS
WORKING TO VERIFY PROPERTY LINE LOCATION IN THE AREA
SOUTHWEST OF THE WEST ASH BASIN SOUTHERN EXTENSION
IMPOUNDMENT.
ALL BOUNDARIES ARE APPROXIMATE.
2016 USGS TOPOGRAPHIC MAP, OLIVE HILL QUADRANGLE,
OBTAINED FROM THE USGS STORE AT
HTTPS:HSTORE. USGS.GOV/MAP-LOCATOR.
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SITE LOCATION MAP
2018 CAMAANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC
SEMORA, NORTH CAROLINA
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l`♦ ♦ BG-1 BRL CW-3D CW-3 CCR-215BR
♦ `♦� BG-1BRLR lieCCR-216BR MW-26BR I 7
�' MW-31 BR CCR-217BR lielie
�
♦� / ♦♦ MW-4BRL W-4BR J
• MW-1 BRLR lieCCR-218BR i
;Gl
• .. BBG-2BR
CW-4
BG-1BR ♦♦ •• A
�MW-15D •♦�••� •
SFMpRga MW-15BR lie ♦ .♦ �., •'
MW-18D
♦ ' • `
ti • MW-18BR • � • `
♦ v • '00- ♦ • 700 350 0 700 1,400
S• ♦/ '� GRAPHIC SCALE IN FEET
•1 r
^�' • `♦ ♦ �~ - - . I synTerra 148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
♦ ' -� - D U K E www.synterracorp.com
' DRAWN BY: J. KIRTZ DATE: 04/29/2019
""
� ` ENERGY PROJECT MANAGER: C. EADY
PROGRESS CHECKED BY: W. GERALD
F�f"ABMW-1
-1 ABMW-3BRR CCR-203BR
CCR-203D
208S
ABMW 2
ROX-2 ABMW-2BR
CCR-209S
CCR-212BR
CCR-211
CCR-213BR
CCR-211 BR
7
LEGEND
WELL IN ASH PORE WATER
WELL IN SAPROLITE ZONE
WELL IN TRANSITION ZONE
WELL IN BEDROCK ZONE
a WELLABANDONED
C PIEZOMETER IN ASH PORE WATER
C PIEZOMETER IN TRANSITION ZONE
C PIEZOMETER IN BEDROCK ZONE
C PIEZOMETER IN UNKNOWN ZONE
• WATER SUPPLY WELL
-ASH BASIN WASTE BOUNDARY (APPROXIMATE)
• ASH BASIN COMPLIANCE BOUNDARY
SOLID WASTE LANDFILL BOUNDARY
• 250' SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS ROXBORO STEAM ELECTRIC PLANT PROPERTY BOUNDARY
STREAM (AMEC NRTR)
EFFLUENT DISCHARGE CANAL
7n WETLANDS (AMEC NRTR)
NOTES
DUKE ENERGY PROPERTY LINESARE REPRESENTED BASED ON HISTORICAL DOCUMENTED
PROPERTY BOUNDARIES AND CURRENT PERSON COUNTY GIS. DUKE ENERGY IS WORKING
TO VERIFY PROPERTY LINE LOCATION IN THE AREASOUTHWEST OF THE WESTASH BASIN
SOUTHERN EXTENSION IMPOUNDMENT.
ALL BOUNDARIES ARE APPROXIMATE.
SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND AREA MIX OF SURVEYED
AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONSARE TO BE DEEMED
APPROXIMATE.
AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON OCTOBER 11, 2017. AERIAL
WAS COLLECTED ON JUNE 13, 2016.
THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE USARMY CORPS OF
ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR
JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDSAND STREAMS BOUNDARIES
WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL AND INFRASTRUCTURE,
INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR ROXBORO STEAM ELECTRIC
PLANT DATED JULY 2, 2015.
WSP SURVEY CONDUCTED APRIL 17, 2014.
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINASTATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE 1-2
SITE MAP WITH MONITORING WELL LOCATIONS
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC
SEMORA, NORTH CAROLINA

�1
J
Ah

POWER HOUSE
7-1

0
M
LU
J
L
M
500
EM
EM
470
EM
East Ash Basin
�—{ A ............ A .............. .A........
Upgradient of Ash Basin
Within or Adjacent to Ash Basin
• O
Within or Adjacent to Ash Basin
450 4-
1/1/15
L....... A— --
IL
\ \ V
moo_ o— T�-- .. -T
❑—
7/1/15 1/1/16 7/1/16 1/1/17 7/1/17 1/1/18 7/1/18 1/1/19
Date
500
480
0
> 460
LIJ
N
J 440
L
c�
420
400
West Ash Basin
— — & E—.—.-a.—.o-._.E-.E.-0._.-a.—.o
Upgradient of Ash Bas
Within or Adjacent to A6h Basin
Downgradient of Ash Basin Dam
E1-- I — 71 —
1/1/15 7/1/15 1/1/16 7/1/16 1/1/17 7/1/17 1/1/18 7/1/18 1/1/19 1
Date
a........ MW-17BR
O
ABMW-06BR
--o—
— --�---
BG01BR
ABMW-03
--�-- MW-24BR
--�---
ABMW-07
— �
— BG-01 BRLR
— � —
- ABMW-036R
— —o— — GMW-08/-08R
— � — -
ABMW-07BR
O
ABMW-01
— � —
ABMW-03BRL
— � — GMW-11
ABMW-07BRL
E)
ABMW-016R
MW-05BR
O ABMW-06
GMW-06
— � —
- ABMW-02
n........
MW-06BR
— --&
— ABMW-026R
MW-06D
Notes:
1. Hydrographs are drawn from water levels measured in the field at each monitoring well
during routine monitoring events.
2. All water levels are in feet (ft), NAVD 88.
4j
synTerra
DUKE
ENERGY,
PROGRESS
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601 FIGURE 3-3
PHONE: [phone] H Y D RO G RA P H S
www.synterracorp.com 2018 CAMA ANNUAL INTERIM MONITORING REPORT
DRAWN BY: W. GERALD DATE: 4/09/2019 ROXBORO STEAM ELECTRIC PLANT
PROJECT MANAGER: C.EADY DUKE ENERGY PROGRESS, LLC
CHECKED BY: K. LAWING SEMORA, NORTH CAROLINA

ti I r•
�-v
(r.. -aIL.� � % /�� r,' it Jr ,�• �i 1L. "•
Notes
Velocity magnitudes in feet per day (ft/day).
Velocity vectors are in three dimensions.
Velocity vector directions shown as black arrows.
Source: Preliminary Updated Groundwater Flow and Transport Modeling Report for Roxboro Steam Electric Plant, Semora, NC, November 2018 (Murdoch, Yu, Graziano & Falta, Revised January 2019)
148 220
LEGEND 0.2-0.3 ft/day �� GREENVILE,SOUTHSTREET,UITE CAROLNA29601 FIGURE 3-4
-0 - 0.001 ft/day 0.3 - 0.4 ft/day
PHONE:[phone] FLOW VELOCITY VECTORS AND MAGNITUDES
synTerra www.,ynterracorp.com TRANSITION FLOW ZONE
0,001-0.01 ft/day 0.4-0.5 ft/day 2018 CAMA ANNUAL INTERIM MONITORING REPORT
DUKE ROXBORO STEAM ELECTRIC PLANT
PROJECT 0.01-4.1 ft/day 0.5-1.0 ft/day t DRAWN BY: AGER:HC.EADY DATE: 4/12/2019 DUKE ENERGY PROGRESS, LLC
ENERGY CHECKED BY: W. G ALD
0.1-0.2 ft/day 1+ ft/day F. CHECKED BY: W.GERALD SEMORA, NORTH CAROLINA

Ad
h r r r f /� f r��r r S � �! .. �•
Notes
Velocity magnitudes in feet per day (ft/day).
Velocity vectors are in three dimensions.
Velocity vector directions shown as black arrows.
Source: Preliminary Updated Groundwater Flow and Transport Modeling Report for Roxboro Steam Electric Plant, Semora, NC, November 2018 (Murdoch, Yu, Graziano & Falta, Revised January 2019)
LEGEND 148 RIVER STREET, SUITE 220 FIGURE 3-5
' 0.2 — 0.3 ft/day 0GREENVILLE, SOUTH CAROLINA 29601
- PHONE:[phone] FLOW VELOCITY VECTORS AND MAGNITUDES
Wn
0-0.001 ft/day 0.3-0.4 ft/day Terra BEDROCK FLOW ZONE
www.synterracorp.com
A 0.001-0.01 ft/day 0.4-0.5 ft/day 2018 CAMA ANNUAL INTERIM MONITORING REPORT
0.01-0.1 ft/day 0.5-1.0 ft/dayDUKE DRAWN BY: J.EBENHACK DATE: 4/12/2019 ROXBORO STEAM ELECTRIC PLANT
PROJECT MANAGER: C.EADY DUKE ENERGY PROGRESS, LLC
ENERGY
0.1-0.2 ft/day 1+ ft/day PROGRESS CHECKED BY: W.GERALD SEMORA, NORTH CAROLINA

Notes:
Flow Velocity Vectors and Magnitudes through East
and West Ash Basins and Dam Current Conditions
Velocity Magnitudes in feet per day (ft/day).
Velocity vectors are in three dimensions.
Velocity vector directions shown as black arrows.
Vertical Exaggeration = 5x
Source: Preliminary Updated Groundwater Flow and
Transport Modeling Report for Roxboro Steam Electric
Plant, Semora, NC, November 2018 (Murdoch, Yu,
Graziano & Falta, Revised January 2019).
0 — 0.001 ft/day
LEGEND 0.001-0.01 ft/day
0.01— 0.1 ft/day
NCIA — 0.2 ft/day
0.2 — 0.3 ft/day
0
0.3 — 0.4
0.4 — 0.5
0.5 — 1.0
■ 1+
Southeast
East Ash Basin
Industrial Landfill
Separator Dike
#� Ash Basin Main Dam
�ti ~ 41 fill }�� ,=� } • + __ ;_;"`'� / Unit 3 Cooling Tower Pond
i
Northwest
Southwest Northeast
West Ash Basin
Filter Dike Ash Basin Main Dam
FGD Ponds
AP� VI/ Heated Water
pr / Dihar e Pond
Approximate Scale (feet) AB I
ft/day
ft/day
ft/day
ft/day
tip
synTerra
DUKE
ENERGY®
CAROLINAS
4
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE: [phone]
www.synterracorp.com
DRAWN BY: J. EBENHACK DATE: 4/29/2019
PROJECT MANAGER: C. EADY
CHECKED BY: K. LAWING
FIGURE 3-6
VERTICAL FLOW VELOCITY VECTORS AND MAGNITUDES
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC
SEMORA, NORTH CAROLINA

A AV
(NORTH)
1■ E
g
J
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N
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STRUCTURAL
❑ FILL
Q Q
Z o
a �
U J
w Q
Z
REGOLITH
♦ I ♦ 1
`BEDRbCK
LEGEND
MW-16S
WELL IN UNKNOWN MATERIAL
MW-12S
WELL IN SAPROLITE MATERIAL
MW-16D
WELL IN TRANSITION ZONE
MW-16BR
WELL IN COMPETENT BEDROCK
ABMW-2
WELL IN ASH PORE WATER
MY-1001
WATER SUPPLY WELL
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
— — —
LITHOLOGIC CONTACT
0 ASH
0 ASH PORE WATER
BEDROCK
DUKE ENERGY ROXBORO STEAM ELECTRIC PLANT PROPERTY
APPROXIMATE ASH BASIN COMPLIANCE BOUNDARY
APPROXIMATE INDUSTRIAL LANDFILL BOUNDARY
APPROXIMATE ASH BASIN
WASTE BOUNDARY
�J
B
V
❑a
APPROXIMATE PHASE 1-5
ENGINEERED BASE
LINER ELEVATION
0 a
o
K
w
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w
Lu
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(SOUTH)
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/
EAST \I/1♦/\/\'/1�/\/\I/1"\/\'/1��\/\'/1"\/\I/lip\/'/1"\/\I/1��\/\'/1"\/\I/1�/\/\I/1"\/\'/1�/\/\I/1"\/\'/1`/ /�' ♦/\/\I/1" /�' ♦/\/\I/1`/ /\'` " / ..�
ASH
/ \ ♦_ / ♦/ / / \ ♦ � / ♦/ / / \ \ � / ♦/ / - / \ ♦� / ♦ / \ - / ♦ / \ - / ` / \ - / ` / \ - / ` / \ - / ♦ / \ - / BASIN
� / I , \ - � 1 / \ - � / I , \ � 1 / \ - � / I , \ � I / \ - � / I , \ � / I / \ - �♦ / 1 , \`- � / I / \ i �\ / I , \`- � / 1 / \ i �\ / I , \`- � / 1 / \ i �\ / I , \`- � / I / \ i �♦ / I , \`- � / I / \ i �♦ / 1 , \`-
V SURFICIAL FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
V TRANSITION ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
V BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
V ASH FLOW LAYER
WATER LEVEL ELEVATION
®j BORON CONCENTRATION (UG/L)
1® SULFATE CONCENTRATION (MG/L)
®1 TOTAL DISSOLVED SOLIDS (MG/L)
® NOT SAMPLED
780.00' WATER LEVEL
NM NOT MEASURED SOURCE INFORMATION:
NOTES
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON NOVEMBER 12, 2018.
2. CONCENTRATIONS ARE THE GEOMEAN FOR ALL SAMPLES TAKEN PER EACH SAMPLE LOCATION IN 2018.
3. THE NORTH CAROLINA 2L FOR BORON IS 700 pg/L, SULFATE IS 250 mg/L, AND
TOTAL DISSOLVED SOLIDS ARE 500 mg/L.
4. PROVISIONAL BACKGROUND THRESHOLD VALUE (PBN) FOR:
- BORON IS 50 pg/L WITHIN BOTH THE TRANSITION ZONE AND BEDROCK FLOW LAYERS
- SULFATE IS 37 mg/L WITHIN THE TRANSITION ZONE FLOW LAYER AND 73.5 mg/L WITHIN THE BEDROCK FLOW LAYER.
- TOTAL DISSOLVED SOLIDS ARE 540 mg/L WITHIN THE TRANSITION ZONE FLOW LAYER AND 530 mg/L WITHIN THE BEDROCK FLOW LAYER.
5. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF 1988.
6. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO DECEMBER 31, 2015.
EXISTING GROUND SURFACE BASED ON A DRAWING PROVIDED BY THE WSP GROUP, TITLED "ROXBORO FINAL", DATED JUNE 8, 2015.
HISTORIC GROUND SURFACE BASED ON THE 7-1/2' USGS TOPOGRAPHIC MAP FOR CLUSTER SPRINGS, VA DATED 1968.
PRIVATE WATER SUPPLY WELL INFORMATION WAS OBTAINED FROM A LIST PROVIDED BY DUKE ENERGY PROGRESS
14
synTem
DUKE
'ENERGY
PROGRESS
0 125 250 500
HORIZONTAL SCALE: 1" = 500'
VERTICAL SCALE: 1" = 100'
5X VERTICAL EXAGGERATION
VERTICAL EXAGGERATION 5X
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
www.synterracorp.com
DRAWN BY: ADAM FEIGL DATE: 04/29/2019
PROJECT MANAGER: CRAIG EADY
LAYOUT: SECTION A -A'
FIGURE 3-7
GENERAL CROSS-SECTION A -A'
EAST ASH BASIN
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC
SEMORA, NORTH CAROLINA

B--no
(NORTHWEST)
DUKE ENERGY ROXBORO STEAM ELECTRIC PLANT PROPERTY
APPROXIMATE ASH BASIN COMPLIANCE BOUNDARY
APPROXIMATE ASH BASIN WASTE BOUNDARY
APPROXIMATE
INDUSTRIAL LANDFILL
ASHzo
o
p n
APPROXIMATE ¢o
/ENGINEERED BASE cr
LINER ELEVATION ,
w L/ c N
w
rn w U
W Z
a U w
a z z U)
� o z w
a 0] m Z w N �
n
B'
(SOUTHEAST)
p �
w �
U J
Z J
p z �
W
Lu Ir MN =
C16 D
WIM2
o j------------------------- p a I ,Irt j i �i \li �' r i 1, i'_ \ `, '; \✓ / I `�i
c2 ro O
v z (9 SOIL ASH PORE
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LEGEND
MW-16S
WELL IN UNKNOWN MATERIAL
MW-12S
WELL IN SAPROLITE MATERIAL
MW-16D
WELL IN TRANSITION ZONE
MW-16BR
WELL IN COMPETENT BEDROCK
ABMW-2
WELL IN ASH PORE WATER
MY-1001
WATER SUPPLY WELL
_ _ _
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
GENERALIZED SUBSURFACE ASH
PORE WATER FLOW DIRECTION
— — —
LITHOLOGIC CONTACT
0 ASH
0 ASH PORE WATER
0 BEDROCK
SOURCE INFORMATION:
V SURFICIAL FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
TRANSITION ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
ASH FLOW LAYER
WATER LEVEL ELEVATION
®j BORON CONCENTRATION (UG/L)
1® SULFATE CONCENTRATION (MG/L)
®I TOTAL DISSOLVED SOLIDS (MG/L)
® NOT SAMPLED
780.00' WATER LEVEL r
NM NOT MEASURED I
EXISTING GROUND SURFACE BASED ON A DRAWING PROVIDED BY THE WSP GROUP, TITLED "ROXBORO FINAL", DATED JUNE 8, 2015.
HISTORIC GROUND SURFACE BASED ON THE 7-1/2' USGS TOPOGRAPHIC MAP FOR CLUSTER SPRINGS, VA DATED 1968.
PRIVATE WATER SUPPLY WELL INFORMATION WAS OBTAINED FROM A LIST PROVIDED BY DUKE ENERGY PROGRESS
0 125 250 500
NOTES
HORIZONTAL SCALE: 1" = 500'
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON NOVEMBER 12, 2018. VERTICAL SCALE: 1" = 100'
2. CONCENTRATIONS ARE THE GEOMEAN FOR ALL SAMPLES TAKEN PER EACH SAMPLE LOCATION IN 2018. 5X VERTICAL EXAGGERATION
3. THE NORTH CAROLINA 2L FOR BORON IS 700 pg/L, SULFATE IS 250 mg/L, AND
TOTAL DISSOLVED SOLIDS ARE 500 mg/L.
4. PROVISIONAL BACKGROUND THRESHOLD VALUE (PBN) FOR:
- BORON IS 50 pg/L WITHIN BOTH THE TRANSITION ZONE AND BEDROCK FLOW LAYERS
- SULFATE IS 37 mg/L WITHIN THE TRANSITION ZONE FLOW LAYER AND 73.5 mg/L WITHIN THE BEDROCK FLOW LAYER.
- TOTAL DISSOLVED SOLIDS ARE 540 mg/L WITHIN THE TRANSITION ZONE FLOW LAYER AND 530 mg/L WITHIN THE BEDROCK FLOW LAYER.
5. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF 1988.
6. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO DECEMBER 31, 2015.
`; VERTICAL EXAGGERATION 5X FIGURE 3-8
GENERAL CROSS-SECTION B-B'
synTer o 148 RIVER STREET, SUITE 220 EAST ASH BASIN
GREENVILLE, SOUTH CAROLINA 29601 2018 CAMA ANNUAL INTERIM MONITORING REPORT
(' DUKE PHONE[phone]
www.synte rraco rp. ROXBORO STEAM ELECTRIC PLANT
.com
com
ENERGY DRAWN BY: ADAMFEIGL DATE:04/25/2019 DUKE ENERGY PROGRESS, LLC
PROJECT MANAGER: CRAIG EADY SEMORA, NORTH CAROLINA
LAYOUT: SECTION B-B'
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LEGEND
POWER PLANT/\I/1��\/♦I/1�//�I/li`\/♦I/1��\/�I/1;`\/♦'/1��\/\I/1;/\/\'/1��\/\I/1�/\/\'/1��\/\I/1��\/♦'/1 �\
V MW16S WELL IN UNKNOWN MATERIAL/11\:%:/11\/.`:////1�\/�.`:/'.\/;;�/I_\/�/\/I/\/.
SURFICIAL FLOW LAYER GROUNDWATER NOTES I ♦ / - I ` / - ` / I ` / - I ` / - `'I ` / ♦ / - `'I ` / ` / -� `I ` / i \I / /
MW-12S WELL IN SAPROLITE MATERIAL WELL WATER LEVEL ELEVATION 1'/
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON NOVEMBER 12, 2018. 0 125 250 500 / ♦ ` ♦- / `/
MW-16D WELL IN TRANSITION ZONE TRANSITION ZONE FLOW LAYER GROUNDWATER
MW-16BR WELL IN COMPETENT BEDROCK WELL WATER LEVEL ELEVATION 2. CONCENTRATIONS ARE THE GEOMEAN FOR ALL SAMPLES TAKEN PER EACH SAMPLE LOCATION IN 2018. HORIZONTAL SCALE: 1" = 500'
EAST ASH BASIN ABMW-2 WELL IN ASH PORE WATER 3. THE NORTH CAROLINA 2L FOR BORON IS 700 Ng/L, SULFATE IS 250 mg/L, AND VERTICAL SCALE: 1" = 100' /`: ,I \� ; %♦ / \/
0 BEDROCK FLOW LAYER GROUNDWATER TOTAL DISSOLVED SOLIDS ARE 500 mg/L. 5X VERTICAL EXAGGERATION / ♦I / I /� I / 1 ' \
MY-1001 WATER SUPPLY WELL WELL WATER LEVEL ELEVATION WELLS PROJECTED ON GROUND SURFACE 1 - \ \ / 1 / \ -
ASH FLOW LAYER 4. PROVISIONAL BACKGROUND THRESHOLD VALUE (PBTV) FOR: / \ / I ' \♦' /`� / \\
WEST ASH • _GENERALIZED WATER TABLE WATER LEVEL ELEVATION - BORON IS 50 Ng/L WITHIN BOTH THE TRANSITION ZONE AND BEDROCK FLOW LAYERS % \' / 1 \ / \' / 1 /
BASIN GENERALIZED GROUNDWATER - SULFATE IS 37 mg/L WITHIN THE TRANSITION ZONE FLOW LAYER AND 73.5 mg/L WITHIN THE BEDROCK FLOW LAYER.
�� FLOW DIRECTION BORON CONCENTRATION (UG/L) - TOTAL DISSOLVED SOLIDS ARE 540 mg/L WITHIN THE TRANSITION ZONE FLOW LAYER AND 530 mg/L WITHIN THE BEDROCK FLOW LAYER.
OONNAWAV RO MEMI PGENERALIZED SUBSURFACE ORE WATER FLOW DIRECTION H SULFATE CONCENTRATION (MG/L) 5. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF 1988.
`-a — LITHOLOGIC CONTACT ® ( / ) 6. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO DECEMBER 31, 2015. ♦ ♦ /1 \= / / \`
1 TOTAL DISSOLVED SOLIDS MG L / ♦' / I \ /� 1 ,
0 ASH ® NOT SAMPLED FIGURE 3-9
ASH PORE WATER 780.00' WATER LEVEL 16' VERTICAL EXAGGERATION 5X GENERAL CROSS-SECTION C-C'
BEDROCK
NM NOT MEASURED symTerra 148 RIVER STREET, SUITE 220 WEST ASH BASIN
S GREENVILLE, SOUTH CAROLINA 29601 2018 CAMA ANNUAL INTERIM MONITORING REPORT
V tiMWOys�gQ SOURCE INFORMATION: WWW PHONE8 4- 1-99 9 ROXBORO STEAM ELECTRIC PLANT
/ NOTE: EXISTING GROUND SURFACE BASED ON A DRAWING PROVIDED BY THE WSP GROUP, TITLED "ROXBORO FINAL", DATED JUNE 8, 2015. DUKE DUKE ENERGY PROGRESS LLC
CROSS SECTION C-G IS LINEAR IN NATURE AND ALL ENERGY DRAWN BY: ADAM FEIGL DATE: 04/25/2019 1
LOCATIONS NOT ALONG THE CROSS SECTION ARE HISTORIC GROUND SURFACE BASED ON THE 7-1/2' USGS TOPOGRAPHIC MAP FOR CLUSTER SPRINGS, VA DATED 1968. PROJECT MANAGER: CRAIG EADY SEMORA, NORTH CAROLINA
PROJECTED ONTO THE CROSS SECTION. PRIVATE WATER SUPPLY WELL INFORMATION WAS OBTAINED FROM A LIST PROVIDED BY DUKE ENERGY PROGRESS LAYOUT: SECTION CC'
PROGRESS

D D'
(NORTH)
(V
r
M
WEST ASH BASIN o
o
(V �
M �
pip
MAIN DAM o
r
a
a
DUKE ENERGY ROXBORO STEAM ELECTRIC PLANT PROPERTY
APPROXIMATE ASH BASIN COMPLIANCE BOUNDARY
APPROXIMATE ASH BASIN WASTE BOUNDARY
LL7
7
M
N
�
7
Lb
N
N
OUTLET STRUCTURE
m
m
ASH BASIN POND\
Q
Q
WATER ELEVATION=462'
LTER DIKE IWAB EXTENSION IMPOUNDMENT
WATER ELEVATION=446'
(SOUTH)
_L__------ —' -- ASH
HEATED WATER / 1
DISCHARGE POND ASH ASH
WATER ELEVATION=412'
mm
® 18
_ l i ♦ I \li ; 1 _ \l i �/ / \/i / 1 = \/i l ♦ /387
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\
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. /`�—`
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\
_\/i ♦/I/\li ♦/I/\/i/♦/I/\/i ♦/li \lil♦/I/\/i ♦/li \lil♦/I/\li ♦/li\/il♦/I/\li ♦/I/\/;�♦//I/
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/_ \ i l � / I' � mil ♦ / 1 / \ i / � / I / \`i l ♦ r l / \ i l � / I / \`i l ♦ r l / \ i l � r l ' \`� / ♦ / I / \ i l � r l ' \`� / ♦ / I / \ i l � r l' \`� l ♦ r l / \ i / � / I / � i l ♦ r l / \ i l � / I / \`i l ♦ r l / \ i l � r l � \`mil ♦ / I / \ i l � r l ' \`� / ♦ / I / \ i l � r l' \`mil ♦ / 1 / \ i / � / I / \`i l ♦ r l / \ i l � / I / \`i l ♦ r l -BED O' ` . \`� / ♦ / I / \ i / � r l' \`� / ♦ / I / \ i / � / 1 �
/ ` ` /I � / \ � —% �I . /; / � \'I . / ` � —% �I . / \ � � \'I . / � / ' % \I . / ` � � \ �I . / � / ' % \I . / ` � � \ /I . / ` � ' % \I . / ` � � \ /I . / ` � —% �I . /; / � \'I . / ` � —% �I . /; / � \'I • / � / ' % \I . / ` � � \ �I . / � / ' % \I . / ` � � \ /I . / ` � —% \I . / ` � � \ /I . / ` � —% �I . /; / � \ it . / ` � —% �I. /; / � \'I . / � / ' % �I . /; BEDROCK %—
�\/�
—\�\ /`—_\—\�/.--\-1 /.--\—\�/.--\-1'/.--\—\%/`--\�\'/`--\—\%/`—,\ \\'/� 1—\ \l; / / ; \ /
/ \/ '♦: /I � \' % //I / `/ .`: /I / `, % //I / \/ .`: /I / `' % //1 / \/ .`: /I � \' % r/I / \/ .`: /I � \, % r/I / \/ .`: /I � \' % //I / `/ .`: /1 / `, � % //I / \/ \' % r/I / \/ .`: /I � \, % r/I / \/ .`: /I � \' % r/I / `/ .`: /I / `, % //I / \/ .`: /I / `, % //I / \/ �.`: /I / `' � % r/I / \/ �.`: /I' \/ ; � //I / \/ i / ♦ / 1'
\/\I B/ EIDi R\O\�CKl `/'I / \ —i / ♦ / I/ / \\ mil `/'I / \�/ 1/ / \ /1 /\�/ 1r i \ rI /\ i / 1r ♦ / I/ / \ /I / \ i / 1/ / \ 1 / \ i / 1r i \ rI//'B\ Ei DR' O/C1 Ki
l♦` l♦` l♦\ l♦` \ \/\I/r1I�/�\ \i/ \I// 1I`/ i \ \/\I/r1I�/�\ \i/♦I// 1I`/ / \ \/�I//1I; / �\ �i/.♦I //11`/ / \ \/�I//1I; / �\ �i/l.♦I`\�/I/\—I/1`r
�
IQ
-i1``� i; � \ BEDROCK,—%� \ //�r-: /:/.�/ i%� 1 //�r-: /:/��/ i%� 1 j/./-: l:l��/ i; � \ j/./_ \ �/`./
_ li ♦ I_\l `i./ — li ♦ I_\ — li ♦ I_\ — / ��./I—\_`'•/ — / ��./I—\/ `'•/ — / ��./1—♦_\'./ — li ♦ I_\_\/./ — li ♦ I_\_ /./ — li ♦ I_\_ /./ — /i ♦ I_\l _ li ♦ I_\l _ li ♦ I_\ — li ♦ I \ — li ♦ I \ _ /i ♦ I \l — l
��%\I/1"\/\I/I j�\%\I/1`/\/\I/I j�\/\I/1`r\/\I/I j�\/\I/1`r\/\I/I j�\/\I/1`r\/\I/I j�\/\I/1"\/\I/I j�\�\I/1`/\/\I/I j�\/\I/1`/\/\I/I j�\/\I/1`r\/\I/I j�\/\I/1`r\/\I/I j�\�\I/1"\/\I/I�r\�\I/1`/\/\I/1\r /\I./`/�/\I/1`r /\I. /`r�/\I/1`r /\I./\��/\I/1`/ /\I ♦/
�\ il�/I'\`��♦; 1�\ i��/I/\`i �♦/1�\ i��/I/\`i �♦/1�\ il�rl'\`��♦/I/\ il�rl'\`��♦/I/\ il�rl'\`��♦/1/\ i��/I/\`i �♦/1/\ i��/I/\`i �♦/1/\ il�rl'\`� �♦/I/\ i/�rl'\`��♦/I/\ il�rl'\`��♦/1/\ i��/I/\`i �♦/1/\ i��/I/\`i �♦/1/\ i��rl/\`i �♦/I/\ i/�rl'\`��♦/I/\ il�/li
�`/\I./`��/\I/1\�`/\I./`��/\I/1`�`/\I./`/�/\I/1`�`/\I./�/`/\I/1`�♦/\I./`��/\I/1`�♦/\I./`��/\I/1\�`/\I./`��/\I/1\�`/\I./`/�/\I/1`�`/\I./�/�/\I/1`�♦/\I./`�`/\I/1`�♦/\I./`��/\I/1\�♦/\I./`��/\I/1\�`/\I./`/�/\I/1`�`/\I./`/`/\I/1`�♦/\I. /`��/\I/1`�♦/\I./`/
/ — \' /.—_ \ — 1 / — \ \ /� _ \
/ \/ �'♦ //1 \, //I / \/ i` //1 `' �` //I / \/ i` //I `, �♦ //I / \/ i`� /I \, //I / \/ i` //I \' r/I ' \l i` //I i \, //I / \/ i` //1 `' �` //I / \/ i` r/I i `, �♦ //I / \l i`� /l i \l ; �♦ //I / \/ `�♦ //l i \l ; //I / \/ ; �♦ //l i \/ ; //I / \/ ; �♦ //l i \/ `�♦ //I / \/ `�♦ //l i \/ `�♦ //I / \/ `�♦ //l i \/ ; �♦ //I / \/ `�♦ //l i \/ ; //I / \l i l ♦ / 1'
LEGEND
MW-16S
WELL IN UNKNOWN MATERIAL
MW-12S
WELL IN SAPROLITE MATERIAL
MW-16D
WELL IN TRANSITION ZONE
MW-16BR
WELL IN COMPETENT BEDROCK
ABMW-2
WELL IN ASH PORE WATER
MY-1001
WATER SUPPLY WELL
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
GENERALIZED SUBSURFACE ASH
PORE WATER FLOW DIRECTION
— — —
LITHOLOGIC CONTACT
ASH
— ASH PORE WATER
BEDROCK
SOURCE INFORMATION:
V SURFICIAL FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
TRANSITION ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
ASH FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
®j BORON CONCENTRATION (UG/L)
1® SULFATE CONCENTRATION (MG/L)
®1 TOTAL DISSOLVED SOLIDS (MG/L)
® NOT SAMPLED
780.00' WATER LEVEL r
NM NOT MEASURED I
EXISTING GROUND SURFACE BASED ON A DRAWING PROVIDED BY THE WSP GROUP, TITLED "ROXBORO FINAL", DATED JUNE 8, 2015.
HISTORIC GROUND SURFACE BASED ON THE 7-1/2' USGS TOPOGRAPHIC MAP FOR CLUSTER SPRINGS, VA DATED 1968.
PRIVATE WATER SUPPLY WELL INFORMATION WAS OBTAINED FROM A LIST PROVIDED BY DUKE ENERGY PROGRESS
0 125 250 500
NOTES
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON NOVEMBER 12, 2018. HORIZONTAL SCALE: 1" = VERTICAL SCALE: 1" = 100'
2. CONCENTRATIONS ARE THE GEOMEAN FOR ALL SAMPLES TAKEN PER EACH SAMPLE LOCATION IN 2018. 5X VERTICAL EXAGGERATION
3. THE NORTH CAROLINA 2L FOR BORON IS 700 ug/L, SULFATE IS 250 mg/L, AND
TOTAL DISSOLVED SOLIDS ARE 500 mg/L.
4. PROVISIONAL BACKGROUND THRESHOLD VALUE (PBTV) FOR:
- BORON IS 50 ug/L WITHIN BOTH THE TRANSITION ZONE AND BEDROCK FLOW LAYERS
SULFATE IS 37 mg/L WITHIN THE TRANSITION ZONE FLOW LAYER AND 73.5 mg/L WITHIN THE BEDROCK FLOW LAYER.
TOTAL DISSOLVED SOLIDS ARE 540 mg/L WITHIN THE TRANSITION ZONE FLOW LAYER AND 530 mg/L WITHIN THE BEDROCK FLOW LAYER.
5. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF 1988.
6. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO DECEMBER 31, 2015
`'
VERTICAL EXAGGERATION 5X
FIGURE 3-10
GENERAL CROSS-SECTION D-D'
ly
synTpea
148 RIVER STREET, SUITE 220
WEST ASH BASIN
GREENVILLE, SOUTH CAROLINA 29601
2018 CAMA ANNUAL INTERIM MONITORING REPORT
f' DUKE
PHONE ,e,,,c 1-9999STEAM
ELECTRIC
R DUKE R ENERGY PROGRESS, PL CNT
A; ENERGY
DRAWNBY:ADAMEIGLOm DATE:04/25/2019
PROJECT MANAGER: CRAIG EADY
SEMORA, NORTH CAROLINA
PROGRESS
LAYOUT: SECTION D-D'

s
`� y' ♦
,
i1
♦ �`
. .✓ �/
DUNNAWAYRD
Sr4TFy `.
hays .f ,
s
w ti FMORA RID
I
10
synTerra
>DUKE
ENERGY
GRAPHIC SCALE
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
DRAWN BY: J. KIRTZ DATE: 04/26/2019
PROJECT MANAGER: C. EADY
CHECKED BY: W. GERALD
LEGEND
0
0
I
NOT
FIGURE 3-11
ISOCONCENTRATION MAP
GEOMEAN OF BORON IN TRANSITION FLOW ZONE
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC
SEMORA, NORTH CAROLINA

i
`�WER��®
,. ^lip
s�
OUNN U
o
. 1
�.�
A-
�66
6 le
0
synTerra
;DUKE
ENERGY
GRAPHIC SCALE
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
DRAWN BY: J. KIRTZ DATE: 04/25/2019
PROJECT MANAGER: C. EADY
CHECKED BY: W. GERALD
LEGEND
•
NOTES:
FIGURE 3-12
ISOCONCENTRATION MAP
GEOMEAN OF BORON IN BEDROCK FLOW ZONE
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC
SEMORA, NORTH CAROLINA

300
CCR-207S*
280
CCR-208S*
' ♦
/ ,
I
. t
I h'
* ■
• `ice - / f .7
.- ♦ GPMW-2D -�
? CCR-113D* 000 ♦ . 1
120 GPMW-1S
y 1245 -.00011' GPMW-3D
GPMW-1D 1149 LEGEND
ABMW-5D
MW-6D* 9 ABMW-5 016MW-22D
1I
M0W-2*
63 'G3sr GW 35 1298 ;6M
CCR-101E)
..�
12.9 ;MW-5D i'
mem®r",
v.
397
CCR-100D*
CW-2 MW-11D ABMW7
89 22 36 �♦� NS 4?
ABMW-4*
189 ABMW-6 PZ-1
..J
2 ABMW-3 CCR-202D* - �� 184
5 1890 { 2100 , .
ABMW-1
N ABMW-2 / m
4
' 57 ® ouNNAwAreo ♦ g4 , �: sr,,
CCR209S*'
25 L CCR-210S* i T
12
CCR-211 S*
49
r
i CW-4
BG-1 39
srgr�H�ys, ,'�•� MW-15D
SFMpRq Rp � ♦ 28
i
v
I
-►� ,.J 1, ,
I
/
■
MW-18D
OTOTAL SULFATE CONCENTRATION (mg/L)
10TOTAL SULFATE CONCENTRATION IN ASH PORE WATER (mg/L)
NORTH CAROLINA2L CONTOUR
WELL IN ASH PORE WATER
DOWNGRADIENT MONITORING WELL
BACKGROUND MONITORING WELL
• WATER SUPPLY WELL
ASH BASIN WASTE BOUNDARY (APPROXIMATE)
•-- ASH BASIN COMPLIANCE BOUNDARY
INDUSTRIAL LANDFILL WASTE BOUNDARY
- - - - - 250' SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS ROXBORO STEAM
ELECTRIC PLANT PROPERTY BOUNDARY
STREAM (AMEC NRTR)
EFFLUENT DISCHARGE CANAL
�T WETLAND (AMEC NRTR)
NOTES:
THE NORTH CAROLINA 2L FOR SULFATE IS 250 mg/L.
BACKGROUND THRESHOLD VALUE (BTV) IS 37 mg/L.
ASH PORE WATER WELL RESULTS ARE SHOWN FOR INFORMATIONAL PURPOSES ONLY
AND ARE NOT USED FOR CONTOURING.
SULFATE DATA INCLUDED IN THIS FIGURE ARE THE GEOMEAN FOR WELLS FROM WHICH
FOUR OR MORE VALID SAMPLES WERE OBTAINED IN 2018. FOR WELLS FROM WHICH
FOUR OR MORE VALID SAMPLES WERE NOT OBTAINED IN 2018, THE MOST RECENT
VALID DATAARE INCLUDED (REFERENCE TABLE 3-5).
NS = NOT SAMPLED
* = CONSTITUENT CONCENTRATION SHOWN IS MOST RECENT VALID SAMPLE AVAILABLE
DUE TO INSUFFICIENT DATASET FOR GEOMEAN CALCULATION.
DATA PRESENTED MAY INCLUDE LAB -QUALIFIED RESULTS. REFER TO ANALYTICAL DATA
TABLE NOTES FOR QUALIFIER DEFINITIONS.
THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF
ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR
JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS
BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL AND
INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR
ROXBORO STEAM ELECTRIC PLANT DATED JULY 2, 2015.
ALL BOUNDARIES ARE APPROXIMATE.
PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS.
DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON HISTORICAL
DOCUMENTED PROPERTY BOUNDARIES AND CURRENT PERSON COUNTY GIS. DUKE
ENERGY IS WORKING TO VERIFY PROPERTY LINE LOCATION IN THE AREA SOUTHWEST
OF THE WEST ASH BASIN SOUTHERN EXTENSION IMPOUNDMENT.
AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON SEPTEMBER 27, 2017.
AERIAL WAS COLLECTED ON JUNE 13, 2016.
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83/2011).
100 GRAPHIC SCALE FIGURE 3-13
0 375 750 1,500 2,250 3,000
ISOCONCENTRATION MAP
Feel
WnTem 148 RIVER STREET, SUITE 220 GEOMEAN OF SULFATE IN TRANSITION FLOW ZONE
GREENVILLE, SOUTH CAROLINA 29601 2018 CAMA ANNUAL INTERIM MONITORING REPORT
;DUKE PHONE[phone] ROXBORO STEAM ELECTRIC PLANT
www.s nterracor .com
•ENERGY DUKE ENERGY PROGRESS, LLC
PROJECT DATE:04/25/2019 SEMORA, NORTH CAROLINA
CHECKED BY: W. GERALD

Ln
ASH
SIN
I,
•�C 66
0
synTerra
>DUKE
ENERGY
.
.
GRAPHIC SCALE
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
www. svnterra c orn. c om
DRAWN BY: J. KIRTZ DATE: 04/25/2019
PROJECT MANAGER: C. EADY
CHECKED BY: W. GERALD
LEGEND
NOTES:
FIGURE 3-14
ISOCONCENTRATION MAP
GEOMEAN OF SULFATE IN BEDROCK FLOW ZONE
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC
SEMORA, NORTH CAROLINA

1
�• 5 r
♦ t
5 h -'
CCR-202D*
3100
CCR-207S*I
■ r-
■
1o7z ,� •�,
■
GPMW-3D -�
1800
r i
W-5D /MW-22D I _
1500 1656
MW-6D*
230 GMW-1A* ABMW-5 �." GMW-6
330 2249 ♦ 1274 i5
CCR-101 D* ■ ` ■
ABMW-7
320 INS 1 ',
CW-2 MW665 MW-11 D ��
427 292 i - NS
NS I
♦ ABMW-4*
3800 ' '
CW-5 � � ■
)0 443 N ABMW-6 , r - -
• 754ioe +--
ABMW-3 ■ �,
1417 CCR-100D* _
CCR-203S* 410
730
s •• %f1'� ♦ i 5100
CCR-209S*
�♦ J 860
I ,
CCR-113D*
j 410
- GPMW-1S
1820
GPMW-1D `
1724 ABM
GMW-2* 242
ABMW-2
235
CCR-21 OS*
DUNNAWAy RD
CCR-211 S*
CW-3* , 500
470
33 1 CW-4
'� �� .... •.` 340
MOW-15D
7'
r f
' l
�. ♦ - �L/y
t .
♦ I
♦ 5
U�
1 I
..0.1
,
MW-18D + ,
623 ♦J
GRAPHIC SCALE
0 375 750 1,500 2,250 3,000
Feet
WnTem148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
f' DUKE �w E 864-42 r-999r9
c' ENERGY DRAWN BY: J. KIRTZ DATE: 04/25/2019
PROJECT MANAGER: C. EADY
CHECKED BY: W. GERALD
LEGEND
©TOTAL DISSOLVED SOLIDS CONCENTRATION (mg/L)
—TOTAL DISSOLVED SOLIDS CONCENTRATION IN ASH PORE WATER (mg/L)
�BTV CONTOUR
WELL IN ASH PORE WATER
DOWNGRADIENT MONITORING WELL
BACKGROUND MONITORING WELL
• WATER SUPPLY WELL
ASH BASIN WASTE BOUNDARY (APPROXIMATE)
�..�. ASH BASIN COMPLIANCE BOUNDARY
INDUSTRIAL LANDFILL WASTE BOUNDARY
250' SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS ROXBORO STEAM
ELECTRIC PLANT PROPERTY BOUNDARY
STREAM (AMEC NRTR)
EFFLUENT DISCHARGE CANAL
—T- WETLAND (AMEC NRTR)
NOTES:
THE NORTH CAROLINA 2L FOR TOTAL DISSOLVED SOLIDS IS 500 mg/L
BACKGROUND THRESHOLD VALUE (BTV) IS 540 mg/L.
ASH PORE WATER WELL RESULTS ARE SHOWN FOR INFORMATIONAL PURPOSES ONLY
AND ARE NOT USED FOR CONTOURING.
TOTAL DISSOLVED SOLIDS DATA INCLUDED IN THIS FIGURE ARE THE GEOMEAN FOR
WELLS FROM WHICH FOUR OR MORE VALID SAMPLES WERE OBTAINED IN 2018. FOR
WELLS FROM WHICH FOUR OR MORE VALID SAMPLES WERE NOT OBTAINED IN 2018, THE
MOST RECENT VALID DATAARE INCLUDED (REFERENCE TABLE 3-5).
NS = NOT SAMPLED
* = CONSTITUENT CONCENTRATION SHOWN IS MOST RECENT VALID SAMPLE AVAILABLE
DUE TO INSUFFICIENT DATASET FOR GEOMEAN CALCULATION.
DATA PRESENTED MAY INCLUDE LAB -QUALIFIED RESULTS. REFER TO ANALYTICAL DATA
TABLE NOTES FOR QUALIFIER DEFINITIONS.
THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF
ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR
JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS
BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL AND
INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR
ROXBORO STEAM ELECTRIC PLANT DATED JULY 2, 2015.
ALL BOUNDARIES ARE APPROXIMATE.
PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS
DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON HISTORICAL
DOCUMENTED PROPERTY BOUNDARIES AND CURRENT PERSON COUNTY GIS. DUKE
ENERGY IS WORKING TO VERIFY PROPERTY LINE LOCATION IN THE AREA SOUTHWEST
OF THE WEST ASH BASIN SOUTHERN EXTENSION IMPOUNDMENT.
AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON SEPTEMBER 27, 2017.
AERIAL WAS COLLECTED ON JUNE 13, 2016.
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83/2011).
FIGURE 3-15
ISOCONCENTRATION MAP
GEOMEAN OF TOTAL DISSOLVED SOLIDS
IN TRANSITION FLOW ZONE
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC
SEMORA, NORTH CAROLINA

1.
tie44
r
-----------------
rYr' r ��•�
t : C_,'
-.� 0.10
_ rTOWER PO�.
A
EA�S.TASH
INDUSTRIAL LAND
-
I I,
O
100
VnT&m
;DUKE
ENERGY
0
GRAPHIC SCALE
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
DRAWN BY: J. KIRTZ DATE: 04/25/2019
PROJECT MANAGER: C. EADY
CHECKED BY: W. GERALD
LEGEND
I
NOTES:
FIGURE 3-16
ISOCONCENTRATION MAP
GEOMEAN OF TOTAL DISSOLVED SOLIDS
IN BEDROCK FLOW ZONE
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC
SEMORA, NORTH CAROLINA

GMW-07
GMW-10
10000
10000
1000
10000
f Boron
IV Cobalt
--0— Manganese
Sulfate
-.
1000
1000
Im 100
J
1000
E
E
c
c
c
L
c
O
O
c
cc
C
c 100
100
10
100
U
V
Q
o
c
U
c
U
m
2
m
�j 10
10
(�j 1
10 D
�
� Boron
�
m
oo
­v— Cobalt
Manganese
Sulfate
1
1
0.1
1
1
1
2002 2004 2006
2008 2010 2012 2014
2016 2018
2002
2004 2006 2008
2010 2012 2014 2016 2018
Time
Time
GMW-11
ABMW-05D
10000
10000
100000
100
10000
1000
1000
J
E
c
c 1000
0rZ
10
100
100
N
C
CID
c(D
100
U
O
U
e
U f Boron
o
10
10
0
U
c v— Cobalt
U
c
m
2i 10 —L]-- Manganese
1 a)
o
o Sulfate
U
U
Boron
1
3
U)
U)
Cobalt
m 1
—0-- Manganese
Sulfate
0.1
0.1
0.1
0.1
2002
2004 2006
2008 2010 2012 2014
2016 2018
1/1/15 1/1/16
1/1/17 1/1l18 1/1119
Time
Time
LEGEND Reference
Boron Cobalt Manganese Sulfate
Reporting Limits
tip
148 RIVER STREET, SUITE 220
Criteria
(jig/L) (Wg/L)
(Wg/L) (mg/L.)
Boron (Ng/L)
50
GREENVILLE, SOUTH CAROLINA 29601
FIGURE 3-17
2L
700 N/A
50 250
Cobalt (Ng/L)
0.1
PHONE:[phone]
TIME -SERIES PLOTS - EAST ASH BASIN
IMAC
N/A 1
N/A N/A
Manganese (Ng/L)
5
s)mTerra
www.synterracorp.com
2018 CAMA ANNUAL INTERIM MONITORING REPORT
BTV (D)
20 1
405 37
Sulfate (mg/L.)
0.1
ROXBORO STEAM ELECTRIC PLANT
BTV (BR)
50 6.4
1198 73.5
DUKE
hr�
DRAWN BY: H. GARRETT DATE: 3/27/2019
DUKE ENERGY PROGRESS, LLC
Notes: N/A = Not Applicable BTV
= Background Threshold Value
D = Transition BR = Bedrock IMAC = Interim Maximum Allowable Conc.
�-+
EI VERGY
PROJECT MANAGER: C. EADY
SEMORA, NORTH CAROLINA
Ng/L = micrograms per liter
mg/L = milligrams per liter
:: .; r ;;;
CHECKED BY: W. GERALD

MW-02
ABMW-03BR
10000
1000
100000
10000
f Boron
-7— Cobalt
11110
--0— Manganese
1000
Sulfate
10000
E
E
0
100
c
o
C
0
L
0
Y
co
100
1000
o
c
U
o
c
U
c
U
10
a)
w
t�
U 10
U 100 T Boron
:3
m
U
m —v-- Cobalt
Manganese
Sulfate
1
1
10
1000
1/1/15 1/1/16
1/1/17
1/1/18 1/1/19
1/1/15 1/1116
1/1117
1/1/18 1/1/19
Time
Time
MW-12BR
ABMW-03BRL
10000
100
1000
1000
1000
0)
100
J
E
E
c
0
c
c
o
c
c�
O
f.
0
c
C5
100
10
c
f Boron
(1)10
7 Cobalt
(D
0
T�
0
--0—Manganese
c
-�
0
Sulfate
Q
c
U
o
T Boron
o
U 10
Cobalt
U 1
m
� Manganese
U
m
U
Sulfate
1
1
0.1
1100
1/1/15
1/1/16
111/17
1/1/18 1/1/19
111/15
1/1/16
1/1/17
1/1118 1/1119
Time
Time
LEGEND Reference
Boron Cobalt Manganese Sulfate
Reporting Limits
tip
148 RIVER STREET, SUITE 220
Criteria
(jig/L) (Wg/L) (Wg/L)
(mg/L)
Boron (Ng/L)
50
GREENVILLE, SOUTH CAROLINA 29601
FIGURE 3-18
2L
700 N/A 50
250
Cobalt (Ng/L)
0.1
PHONE:[phone]
TIME -SERIES PLOTS — WEST ASH BASIN
IMAC
N/A 1 N/A
N/A
Manganese (Ng/L)
5
s)mTerra
www.synterracorp.com
2018 CAMA
ANNUAL INTERIM MONITORING REPORT
BTV (D)
20 1 405
37
Sulfate (mg/L.)
0.1
ROXBORO STEAM ELECTRIC PLANT
BTV (BR)
50 6.4 1198
73.5
DUKE
hr�
DRAWN BY: H. GARRETT DATE: 3/27/2019
DUKE ENERGY PROGRESS, LLC
Notes: N/A = Not Applicable BTV = Background Threshold Value D = Transition
BR = Bedrock
IMAC = Interim Maximum Allowable Conc.
�-+
EI VERGY
PROJECT MANAGER: C. EADY
SEMORA, NORTH CAROLINA
Ng/L = micrograms per liter
mg/L = milligrams per liter
:: .; r ;;;
CHECKED BY: W. GERALD

CW-02
MW-05D
1000
1000
10000
1000
f Boron
-,v— Cobalt
# Manganese
Sulfate
1000
� 100
J
�
E
c
o
c
c
o
.r
c
m 100
g
10
100
aa)
c
u
c
f Boron
U
o
U 10
v Cobalt
o
c
U
c
-AD-- Manganese
U
a�
Sulfate
a;
c�
U 1
U
U
m 1
0.1
10
0-1
100
2010
2011 2012 2013
2014 2015
2016 2017 2018 2019
1/1/15
1/1/16
1/1/17
1/1/18 1/1/19
Time
Time
CW-02D
MW-05BR
100
1000
1000
1000
J
=
'�
J
0 10
100
o 100
�•
N
c
O
+-
+•
Cull
c
O
.0
C
L
�
CU
c
# Boron
U
o
U
7 Cobalt
c
0
c
U
c
# Manganese
U
1
10
0
2 10
f Sulfate
(D
o
o
U
# Boron
U
pp
Cobalt
m
U)
# Manganese
Sulfate
0.1
1
1
100
2010
2011 2012 2013
2014 2015
2016 2017 2018 2019
111/15
1/1/16
1/1/17
1/1/18 111/19
Time
Time
LEGEND Reference
Boron Cobalt Manganese Sulfate
Reporting Limits
tip
148 RIVER STREET, SUITE 220
Criteria
(jI (Wg/L) (Wg/L)
(mg/L.)
Boron (Ng/L)
50
GREENVILLE, SOUTH CAROLINA 29601
FIGURE 3-19
2L
700 N/A 50
250
Cobalt (Ng/L.)
0.1
PHONE:[phone]
TIME
-SERIES PLOTS - WEST ASH BASIN
IMAC
N/A 1 N/A
N/A
Manganese (Ng/L)
5
s)mTerra
www.synterracorp.com
2018 CAMA
ANNUAL INTERIM MONITORING REPORT
BTV (D)
20 1 405
37
Sulfate (mg/L.)
0.1
ROXBORO STEAM ELECTRIC PLANT
BTV (BR)
50 6.4 1198
73.5
-,*,DUKE
DRAWN BY: H.GARRETT DATE:
3/27/2019
DUKE ENERGY PROGRESS, LLC
Notes: N/A = Not Applicable BTV = Background Threshold Value D = Transition
BR = Bedrock
IMAC = Interim Maximum Allowable Conc.
h'�-+
EI VERGY
PROJECT MANAGER: C. EADY
SEMORA, NORTH CAROLINA
Ng/L = micrograms per liter
mg/L = milligrams per liter
:: .; r ;;;
CHECKED BY: W. GERALD

2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Progress, LLC - Roxboro Steam Electric Plant SynTerra
TABLES

TABLE 1-1
MONITORING WELL CONSTRUCTION INFORMATION
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Well ID
Date
Installed
Monitoring Zone
Material
Diameter
(Inches)
Northing
(Ft-NAD 83)
Fasting
(Ft-NAD 83)
Measuring Point
TOC Elevation
(Ft -NAND 88)
Ground Surface
Elevation
(Ft -NAND 88)
Total Well
Depth
(Ft-BGS)
Measured Well
Depth
(Ft-BTOC)
Screened
Interva 13
(Ft-BGS)
Top of Screen
Elevation
(Ft -NAND 88)
Bottom of Screen
Elevation
(Ft -NAND 88)
2018 IMP MONITORING WELLS
ABMW-01
4/28/2015
Ash
PVC
2
991717.60
1977553.39
470.58
467.57
70.0
73.0
65.0
70.0
402.6
397.6
ABMW-01BR
4/30/2015
Bedrock
PVC
2
991717.87
1977548.29
470.60
467.66
118.7
121.6
108.0
118.0
359.7
349.7
ABMW-02
5/3/2015
Ash
PVC
2
990476.64
1978113.17
471.73
469.00
77.7
80.5
70.7
75.7
398.3
393.3
ABMW-02BR
5/5/2015
Bedrock
PVC
2
990481.81
1978118.15
471.68
468.94
103.6
106.4
98.8
103.8
370.1
365.1
ABMW-03
4/27/2015
Ash
PVC
2
992468.82
1977830.05
471.75
468.18
7.4
11.0
3.0
8.0
465.2
460.2
ABMW-03BR
5/5/2015
Bedrock
PVC
2
992469.71
1977834.64
471.87
468.22
53.3
57.0
47.0
57.0
421.2
411.2
ABMW-03BRL
3/18/2016
Bedrock
PVC
2
992476.56
1977828.55
471.90
468.27
244.4
248.0*
235.3
245.3
233.0
223.0
ABMW-04
4/18/2015
Ash
PVC
2
993230.04
1980874.56
500.14
497.30
48.4
51.2
43.0
48.0
454.3
449.3
ABMW-04BR
4/27/2015
Bedrock
PVC
2
993231.94
1980879.20
500.14
497.23
96.2
99.1
90.2
95.2
407.0
402.0
ABMW-05
3/17/2015
Ash
PVC
2
993818.44
1980356.45
480.03
477.37
53.3
56.0
51.0
56.0
426.4
421.4
ABMW-05D
3/18/2015
Saprolite
PVC
2
993819.31
1980358.91
479.98
477.27
88.3
91.0
86.0
91.0
391.3
386.3
ABMW-06
3/13/2015
Ash
PVC
2
993007.81
1980056.17
481.13
478.25
60.1
63.0
55.0
60.0
423.3
418.3
ABMW-06BR
3/14/2015
Bedrock
PVC
2
993008.04
1980058.74
481.19
478.19
87.0
90.0
82.0
87.0
396.2
391.2
ABMW-07
3/15/2015
Ash
PVC
2
993704.63
1980943.64
479.33
476.64
77.4
80.1
72.0
77.0
404.6
399.6
ABMW-07BR
3/16/2015
Bedrock
PVC
2
993704.41
1980941.24
479.29
476.44
132.3
135.1
127.6
132.6
348.8
343.8
ABMW-07BRL
3/31/2016
Bedrock
PVC
2
993697.74
1980958.06
480.43
477.53
295.1
298.0*
285.0
295.0
192.5
182.5
BG-01
11/2/2010
Transition - Bedrock
PVC
2
987881.60
1976145.70
533.74
530.89
51.9
54.8
32.5
52.0
498.4
478.9
BG-01BR
4/14/2015
Bedrock
PVC
2
987880.96
1976137.66
534.68
531.20
92.1
95.6
82.0
92.0
449.2
439.2
BG-1BRL
3/2/2016
Bedrock
PVC
2
988112.06
1976428.29
519.99
517.28
275.3
278*
265.0
275.0
252.3
242.3
BG-01BRLR
2/22/2017
Bedrock
PVC
2
988105.41
1976418.28
521.36
518.48
160.3
163.2
150.0
160.0
368.5
358.5
BG-2BR
8/4/2017
Bedrock
PVC
2
987894.03
1976139.34
534.54
531.13
235.0
238.4*
225.0
235.0
306.1
296.1
CCR-113BR
6/25/2018
Bedrock
PVC
2
996010.54
1980225.27
434.95
432.43
78.0
81.2
68.0
78.0
363.7
353.7
CCR-113D
6/20/2018
Transition
PVC
2
996011.37
1980234.22
434.72
432.51
42.0
45.3
32.0
42.0
399.4
389.4
CW-01
10/29/2010
Bedrock
PVC
2
994400.84
1983011.71
508.24
505.77
40.1
42.6
20.0
39.8
485.8
466.0
CW-02
10/29/2010
Transition
PVC
2
993052.60
1977462.67
424.60
421.74
17.3
20.1
7.7
17.5
414.0
404.2
CW-02D
10/28/2010
Bedrock
PVC
2
993049.41
1977468.27
424.60
422.15
30.4
32.6
25.1
29.9
397.1
392.3
CW-03
10/26/2010
Transition
PVC
2
988904.54
1977321.01
451.79
448.46
10.9
14.3
3.4
11.4
445.1
437.1
CW-03D
10/29/2010
Bedrock
PVC
2
988904.35
1977313.05
451.61
448.12
46.1
49.6
41.7
46.5
406.4
401.6
CW-04
11/1/2010
Transition - Bedrock
PVC
2
987736.04
1978596.91
479.65
477.26
39.8
42.2
24.2
39.0
453.1
438.3
CW-05
11/3/2010
Transition
PVC
2
993025.77
1978359.73
459.74
457.43
19.9
22.2
4.7
19.5
452.7
437.9
GMW-06
3/14/2002
Transition
PVC
2
994176.00
1981014.48
478.36
477.76
45.9
46.5
30.0
45.0
447.8
432.8
GMW-07
6/28/2010
Bedrock
PVC
2
992406.86
1981055.19
499.60
496.96
54.0
57.4
39.0
54.0
458.0
443.0
IL GMW-08
3/14/2002
Bedrock
PVC
2
991818.76
1982129.87
528.55
525.58
63.9
66.9
53.0
63.0
472.6
462.6
Page 1 of 3

TABLE 1-1
MONITORING WELL CONSTRUCTION INFORMATION
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Well ID
Date
Installed
Monitoring Zone
Material
Diameter
(Inches)
Northing
(Ft-NAD 83)
Fasting
(Ft-NAD 83)
Measuring Point
TOC Elevation
(Ft -NAND 88)
Ground Surface
Elevation
(Ft -NAND 88)
Total Well
Depth
(Ft-BGS)
Measured Well
Depth
(Ft-BTOC)
Screened
Interva 13
(Ft-BGS)
Top of Screen
Elevation
(Ft -NAND 88)
Bottom of Screen
Elevation
(Ft -NAND 88)
2018 IMP MONITORING WELLS (CONTINUED)
GMW-08R
8/10/2018
Bedrock
PVC
2
991827.52
1982112.08
528.17
525.72
57.0
60.4
47.0
57.0
477.8
467.8
GMW-09
3/14/2002
Bedrock
PVC
2
991723.26
1983059.40
536.52
533.80
46.0
48.7
30.0
45.0
503.8
488.8
GMW-10
9/25/2002
Bedrock
PVC
2
994405.33
1981428.52
494.41
490.97
45.1
48.6
30.0
45.0
461.0
446.0
GMW-11
9/26/2002
Bedrock
PVC
2
994284.70
1981768.83
496.55
493.41
45.9
49.0
30.0
45.0
463.4
448.4
GPMW-01BR
3/8/2017
Bedrock
PVC
2
995026.09
1980829.55
437.41
434.67
109.0
112.3
99.0
109.0
335.7
325.7
GPMW-01D
3/6/2017
Transition
PVC
2
995023.52
1980821.99
437.49
434.79
60.0
63.3
50.0
60.0
384.8
374.8
GPMW-01S
3/6/2017
Saprolite
PVC
2
995031.81
1980827.41
437.30
434.49
30.0
33.7
20.0
30.0
414.5
404.5
GPMW-02BR
3/8/2017
Bedrock
PVC
2
995418.69
1981500.96
436.48
433.38
99.5
102.0
89.5
99.5
343.9
333.9
GPMW-02D
3/7/2017
Transition
PVC
2
995419.62
1981494.89
436.31
433.27
46.0
50.0
36.0
46.0
397.3
387.3
GPMW-03BR
3/8/2017
Bedrock
PVC
2
995702.33
1982145.94
435.66
432.64
108.0
111.2
98.0
108.0
334.6
324.6
GPMW-03D
3/6/2017
Transition
PVC
2
995705.77
1982154.26
435.42
432.66
33.5
35.5
23.5
33.5
409.2
399.2
MW-01BR
3/26/2015
Bedrock
PVC
2
994421.40
1982989.86
507.86
504.82
77.0
76.2
66.2
76.2
438.6
428.6
MW-02
12/22/1986
Transition
PVC
2
992334.64
1976849.04
423.20
421.34
25.6
27.2
20.5
25.5
400.8
395.8
MW-02BR
3/12/2015
Bedrock
PVC
2
992275.11
1979378.74
493.79
490.79
36.0
39.0
30.1
35.4
460.7
455.4
MW-03BR
5/14/2015
Bedrock
PVC
2
995567.44
1982389.53
452.77
449.59
63.9
67.1
57.1
67.1
392.5
382.5
MW-04BR
5/13/2015
Bedrock
PVC
2
987870.41
1978604.32
502.46
499.10
90.1
93.4
80.0
90.0
419.1
409.1
MW-4BRL
3/8/2016
Bedrock
PVC
2
987877.36
1978601.48
502.62
499.66
305.0
308*
285.0
305.0
214.7
194.7
MW-05BR
3/31/2015
Bedrock
PVC
2
993047.04
1978346.60
458.97
455.94
70.0
73.0
62.8
73.0
393.1
382.9
MW-05D
3/27/2015
Transition
PVC
2
993051.09
1978345.24
458.71
455.76
20.9
23.8
15.4
20.4
440.4
435.4
MW-06BR
4/2/2015
Bedrock
PVC
2
993847.69
1978041.65
417.73
415.02
74.0
76.8
62.9
73.0
352.1
342.0
MW-06D
4/1/2015
Transition
PVC
2
993844.55
1978041.17
417.71
415.01
21.1
23.8
16.0
21.0
399.0
394.0
MW-07BR
4/16/2015
Bedrock
PVC
2
989954.04
1975502.89
478.10
475.15
57.4
60.3
47.0
57.0
428.2
418.2
MW-08BR
4/28/2015
Bedrock
PVC
2
991669.30
1975524.61
482.75
479.85
83.7
86.6
76.4
86.4
403.5
393.5
MW-09BR
5/4/2015
Bedrock
PVC
2
992764.11
1976206.52
450.17
447.25
52.2
55.1
42.0
52.0
405.3
395.3
MW-10BR
4/8/2015
Bedrock
PVC
2
989997.66
1982067.90
536.23
533.42
42.0
44.2
36.0
41.0
497.4
492.4
MW-11BR
3/4/2015
Bedrock
PVC
2
993472.00
1979319.02
467.54
464.80
43.1
45.8
40.5
45.5
424.3
419.3
MW-11D
2/6/2017
Transition
PVC
2
993480.43
1979325.99
467.28
464.60
31.0
33.6
20.5
30.5
444.1
434.1
MW-12BR
4/29/2015
Bedrock
PVC
2
991274.91
1976269.54
456.45
453.48
57.0
60.0
52.0
57.0
401.5
396.5
MW-13BR
3/4/2015
Bedrock
PVC
2
990704.40
1982798.16
552.98
550.12
55.9
58.8
43.0
48.0
507.1
502.1
MW-14BR
2/28/2015
Bedrock
PVC
2
996095.64
1984648.02
513.34
510.56
82.4
85.2
77.0
82.0
433.6
428.6
MW-15BR
4/9/2015
Bedrock
PVC
2
987071.73
1977796.64
508.58
504.83
59.8
63.6
50.0
60.0
454.8
444.8
MW-15D
4/18/2015
Transition
PVC
2
987068.84
1977798.33
508.72
505.24
30.5
34.0
21.0
31.0
484.2
474.2
MW-16BR
4/7/2015
Bedrock
PVC
2
990431.57
1981217.87
520.51
517.62
55.7
58.6
50.5
55.5
467.1
462.1
MW-17BR
4/22/2015
Bedrock
PVC
2
992038.66
1985264.19
534.84
532.05
82.0
84.5
65.0
75.0
467.1
457.1
Page 2 of 3

TABLE 1-1
MONITORING WELL CONSTRUCTION INFORMATION
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Well ID
Date
Installed
Monitoring Zone
Material
Diameter
(Inches)
Northing
(Ft-NAD 83)
Fasting
(Ft-NAD 83)
Measuring Point
TOC Elevation
(Ft -NAND 88)
Ground Surface
Elevation
(Ft -NAND 88)
Total Well
Depth 1,3
(Ft-BGS)
Measured Well
Depth
(Ft-BTOC)
Screened
Interva 13
(Ft-BGS)
Top of Screen
Elevation
(Ft -NAND 88)
Bottom of Screen
Elevation
(Ft -NAND 88)
2018 IMP MONITORING WELLS (CONTINUED)
MW-18BR
5/18/2015
Bedrock
PVC
2
986577.83
1982230.65
532.94
529.44
106.7
110.2
97.1
107.1
432.3
422.3
MW-18D
5/16/2015
Transition
PVC
2
986575.38
1982232.70
532.96
529.66
57.7
61.0
48.1
58.1
481.6
471.6
MW-19BRL
6/9/2016
Bedrock
PVC
2
990230.28
1982876.09
564.32
561.16
73.8
77.0
63.0
73.0
498.2
488.2
MW-20BRL
2/27/2016
Bedrock
PVC
2
993029.10
1984933.11
487.11
483.47
201.0
205*
195.0
205.0
288.5
278.5
MW-21BRL
4/28/2016
Bedrock
PVC
2
991832.78
1982130.13
529.59
526.57
157.8
160.8
143.0
158.0
383.6
368.6
MW-21BRLR
8/13/2018
Bedrock
PVC
2
991837.43
1982115.87
528.61
525.72
150.0
153.5
135.0
150.0
390.1
375.1
MW-22BR
4/15/2016
Bedrock
PVC
2
994705.94
1981529.13
474.00
470.93
71.2
74.3
60.0
70.0
410.9
400.9
MW-22D
4/14/2016
Bedrock
PVC
2
994705.94
1981520.31
474.05
470.79
35.7
38.9
26.0
36.0
444.8
434.8
MW-23BR
6/8/2016
Bedrock
PVC
2
993204.21
1984286.31
518.94
515.74
129.8
133.0
119.0
129.0
396.7
386.7
MW-23BRR
2/9/2017
Bedrock
PVC
2
993220.29
1984306.91
523.82
521.11
204.0
206.7
194.0
204.0
327.1
317.1
MW-24BR
6/8/2016
Bedrock
PVC
2
992253.43
1985191.48
527.07
524.02
155.8
158.9
145.0
155.0
379.0
369.0
MW-25BR
6/7/2016
Bedrock
PVC
2
991842.17
1984850.17
543.38
540.36
110.0
113.7
100.0
110.0
440.4
430.4
MW-26BR
6/8/2016
Bedrock
PVC
2
988570.28
1982360.46
521.29
518.04
80.9
84.2
74.0
84.0
444.0
434.0
MW-27BR
2/7/2017
Bedrock
PVC
2
994890.41
1982526.57
484.04
481.13
76.2
79.1
65.0
75.0
415.0
405.0
MW-28BR
2/21/2017
Bedrock
PVC
2
995859.22
1983070.71
477.03
474.07
134.0
137.0
124.0
134.0
350.1
340.1
MW-29BR
2/20/2017
Bedrock
PVC
2
995175.74
1983887.26
499.09
496.10
84.4
87.4
74.0
84.0
421.7
411.7
MW-30BR
2/10/2017
Bedrock
PVC
2
994378.33
1984205.98
523.95
520.87
141.7
144.8
130.0
140.0
389.2
379.2
MW-31BR
2/7/2017
Bedrock
PVC
2
988213.19
1976894.64
505.40
502.71
78.8
81.4
68.0
78.0
434.0
424.0
MW-32BR
2/14/2017
Bedrock
PVC
2
989621.30
1976363.75
512.04
509.27
261.0
263.8
250.0
260.0
258.3
248.3
MW-33BR
2/17/2017
Bedrock
PVC
2
990698.73
1976055.92
520.12
516.89
298.2
301.4
283.0
298.0
228.7
218.7
2018 NON -IMP - WATER LEVEL ONLY
PZ-12
5/6/2003
Ash
PVC
2
992994.77
1983152.75
514.41
511.64
52.2
55.0
30.0
50.0
481.6
461.6
CCR-104BR
5/4/2016
Bedrock
PVC
2
994160.60
1981022.69
481.20
478.13
76
81.6
66.0
76.0
409.6
399.6
Notes:
* - Well over 200 ft, total depth estimated
1 - Well depths initially measured during well installation and updated as new wells are installed.
Z -"Total Well Depth" is the depth to the bottom of the filter pack.
3 - Values measured during well installation
BGS - Below ground surface
BTOC - Below top of casing
Ft - Feet
IMP - Interim Monitoring Plan
NA - Not applicable
NAD 83 - North American Datum 1983
NAVD 88 - North American Vertical Datum 1988
PVC - Polyvinyl chloride
Red font indicates abandoned well
Prepared by: WCG Checked by: CDE
Page 3 of 3

TABLE 2-1
2018 CAMA WATER ELEVATIONS
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Well ID
Quarter 1
Quarter 2
Quarter 3
Quarter 4
Screened
Interval
(Ft-BGS)
Monitoring Zone
Groundwater Elevation
(Ft-NAVD 88)
1/23 - 2/1/18
Groundwater Elevation
(Ft-NAVD 88)
4/5/18
Groundwater Elevation
(Ft-NAVD 88)
7/25 - 7/26/18
Groundwater Elevation
(Ft-NAVD 88)
11/12 - 11/13/18
IMP WELLS
ABMW-01
464.53
464.10
464.33
464.34
65.0
70.0
Ash
ABMW-01BR
463.51
463.27
463.59
463.72
108.0
118.0
Bedrock
ABMW-02
464.62
464.13
464.20
463.27
70.7
75.7
Ash
ABMW-02BR
464.58
464.07
464.15
463.45
98.8
103.8
Bedrock
ABMW-03
466.00
464.80
464.86
466.48
3.0
8.0
Ash
ABMW-03BR
447.91
448.52
448.41
449.76
47.0
57.0
Bedrock
ABMW-03BRL
427.07
427.70
427.35
428.60
235.3
245.3
Bedrock
ABMW-041
468.14
468.85
469.16
--
43.0
48.0
Ash
ABMW-04BR1
468.14
468.76
469.10
--
90.2
95.2
Bedrock
ABMW-05
466.91
467.47
467.63
470.33
51.0
56.0
Ash
ABMW-05D
434.87
435.18
434.81
436.43
86.0
91.0
Saprolite
ABMW-06
468.60
468.81
469.02
470.31
55.0
60.0
Ash
ABMW-06BR
468.65
468.79
469.07
470.39
82.0
87.0
Bedrock
ABMW-07
--
467.26
467.46
469.62
72.0
77.0
Ash
ABMW-07BR
463.35
464.14
464.27
466.39
127.6
132.6
Bedrock
ABMW-07BRL
456.33
457.08
457.06
459.06
285.0
295.0
Bedrock
BG-01
494.31
494.33
495.23
495.98
32.5
52.0
Transition - Bedrock
BG-01BR
492.93
493.85
494.94
495.73
82.0
92.0
Bedrock
BG-01BRL
--
480.13
480.70
481.53
265.0
275.0
Bedrock
BG-01BRLR
482.02
483.61
483.77
482.17
150.0
160.0
Bedrock
BG-02BR
483.40
484.92
486.12
485.72
225.0
235.0
Bedrock
CCR-113BR2
--
--
410.25
411.27
68.0
78.0
Bedrock
CCR-113D2
--
--
411.46
412.63
32.0
42.0
Transition
CW-01
481.04
484.24
483.64
--
20.0
39.8
Bedrock
CW-02
410.24
411.22
410.90
411.86
7.7
17.5
Transition
CW-02D
410.25
411.19
410.90
--
25.1
29.9
Bedrock
CW-03
446.84
446.50
446.59
447.39
3.4
11.4
Transition
CW-03D
449.20
449.78
448.85
450.31
41.7
46.5
Bedrock
CW-04
450.71
451.02
451.25
--
24.2
39.0
Transition - Bedrock
CW-05
448.65
449.59
449.42
451.21
4.7
19.5
Transition
GMW-06
454.48
456.56
456.44
459.81
30.0
45.0
Transition
GMW-07
471.77
472.58
472.24
477.15
39.0
54.0
Bedrock
GMW-081
481.25
481.16
482.45
--
53.0
63.0
Bedrock
Page 1 of 3

Quarter 1
Groundwater Elevation
Well ID (Ft-NAVD 88)
1/23 - 2/1/18
TABLE 2-1
2018 CAMA WATER ELEVATIONS
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Quarter 2
Groundwater Elevation
(Ft-NAVD 88)
4/5/18
Quarter 3
Groundwater Elevation
(Ft-NAVD 88)
7/25 - 7/26/18
Quarter 4
Screened
Groundwater Elevation Interval
(Ft-NAVD 88) (Ft-BGS) Monitoring Zone
11/12 - 11/13/18
IMP WELLS (CONTINUED)
GMW-08R2
--
--
--
485.36
47.0
57.0
Bedrock
GMW-09
511.53
512.70
513.71
516.48
30.0
45.0
Bedrock
GMW-10
461.14
465.92
464.21
470.60
30.0
45.0
Bedrock
GMW-11
476.54
477.63
478.51
480.96
30.0
45.0
Bedrock
GPMW-01BR
412.75
413.98
414.83
415.50
99.0
109.0
Bedrock
GPMW-01D
415.08
416.59
418.20
418.85
50.0
60.0
Transition
GPMW-01S
415.70
417.27
419.15
419.78
20.0
30.0
Saprolite
GPMW-02BR
410.81
412.31
412.36
413.25
89.5
99.5
Bedrock
GPMW-02D
410.76
412.62
412.93
413.86
36.0
46.0
Transition
GPMW-03BR
412.72
414.01
413.77
414.78
98.0
108.0
Bedrock
GPMW-03D
417.59
420.44
420.87
423.67
23.5
33.5
Transition
MW-01BR
476.50
478.75
477.74
478.86
66.2
76.2
Bedrock
MW-02
409.71
410.47
410.11
411.31
20.5
25.5
Transition
MW-02BR
474.44
479.04
478.85
483.49
30.1
35.4
Bedrock
MW-03BR
423.88
426.46
426.09
429.42
57.1
67.1
Bedrock
MW-04BR
455.66
456.33
456.73
456.85
80.0
90.0
Bedrock
MW-04BRL
--
460.30
460.58
461.05
285.0
305.0
Bedrock
MW-05BR
430.14
431.23
430.72
432.62
62.8
73.0
Bedrock
MW-05D
448.93
449.56
449.45
451.46
15.4
20.4
Transition
MW-06BR
410.02
--
--
398.74 (*)
62.9
73.0
Bedrock
MW-06D
412.20
--
--
398.76 (*)
16.0
21.0
Transition
MW-07BR
461.60
464.45
463.70
468.50
47.0
57.0
Bedrock
MW-08BR
441.10
441.17
441.37
442.00
76.4
86.4
Bedrock
MW-09BR
412.88
416.25
416.92
419.74
42.0
52.0
Bedrock
MW-10BR
511.33
511.86
512.63
513.55
36.0
41.0
Bedrock
MW-11BR
460.42
462.63
462.98
464.23
40.5
45.5
Bedrock
MW-11D
459.70
461.64
461.94
462.87
20.5
30.5
Transition
MW-12BR
450.44
450.74
451.18
452.75
52.0
57.0
Bedrock
MW-13BR
512.72
512.85
513.01
514.04
43.0
48.0
Bedrock
MW-14BR
463.09
462.40
463.07
464.19
77.0
82.0
Bedrock
MW-15BR
496.13
498.94
499.12
501.83
50.0
60.0
Bedrock
MW-15D
497.13
500.16
500.38
503.20
21.0
31.0
Transition
MW-16BR
487.64
488.68
489.92
491.43
50.5
55.5
Bedrock
Page 2 of 3

TABLE 2-1
2018 CAMA WATER ELEVATIONS
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Well ID
Quarter 1
Quarter 2
Quarter 3
Quarter 4
Screened
Interval
(Ft-BGS)
Monitoring Zone
Groundwater Elevation
(Ft-NAVD 88)
1/23 - 2/1/18
Groundwater Elevation
(Ft-NAVD 88)
4/5/18
Groundwater Elevation
(Ft-NAVD 88)
7/25 - 7/26/18
Groundwater Elevation
(Ft-NAVD 88)
11/12 - 11/13/18
IMP WELLS (CONTINUED)
MW-17BR
496.60
497.39
497.33
498.41
65.0
75.0
Bedrock
MW-18BR
484.94
484.59
485.12
486.26
97.1
107.1
Bedrock
MW-18D
485.40
484.88
485.42
486.37
48.1
58.1
Transition
MW-19BRL
524.56
525.69
536.02
527.90
63.0
73.0
Bedrock
MW-20BRL
--
487.11
487.11
487.11
195.0
205.0
Bedrock
MW-21BRL1
--
482.09
470.49
--
143.0
158.0
Bedrock
MW-21BRL ,
--
--
--
482.20
135.0
150.0
Bedrock
MW-22BR
453.02
455.29
438.91
459.07
60.0
70.0
Bedrock
MW-22D
453.66
455.63
455.57
458.86
26.0
36.0
Transition
MW-23BR
--
472.73
472.35
475.15
119.0
129.0
Bedrock
MW-23BRR
506.31
507.94
509.46
513.59
194.0
204.0
Bedrock
MW-24BR
485.36
486.64
486.01
486.93
145.0
155.0
Bedrock
MW-25BR
494.31
494.89
495.41
496.42
100.0
110.0
Bedrock
MW-26BR
482.97
484.79
484.74
485.94
74.0
84.0
Bedrock
MW-27BR
446.39
452.90
451.48
453.85
65.0
75.0
Bedrock
MW-28BR
416.06
417.53
416.91
419.53
124.0
134.0
Bedrock
MW-29BR
454.81
456.81
457.31
460.83
74.0
84.0
Bedrock
MW-30BR
459.86
459.67
459.76
459.85
130.0
140.0
Bedrock
MW-31BR
465.09
466.31
465.62
467.90
68.0
78.0
Bedrock
MW-32BR
469.90
470.41
470.65
471.15
250.0
260.0
Bedrock
MW-33BR
455.27
455.32
456.03
456.84
283.0
298.0
Bedrock
Water Level Only - Non IMP
PZ-12 -- -- 470.61 471.06 30.0 50.0 Ash
Notes:
0 - water level identified as anamolous likely due to field transcription error
' - abandoned monitorinq well
Z - newly installed monitorinq well
-- not measured or not available
(*) - Data does not reflect the most recent Top of Casing elevation. Survey data pending.
BGS - below ground surface
Ft - Feet
IMP - Interim Monitoring Plan
NAVD 88 - North American Vertical Datum 1988
Prepared by: HES Checked by: TCP
Page 3 of 3

TABLE 3-1
HORIZONTAL HYDRAULIC GRADIENTS AND FLOW VELOCITIES
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC SEMORA, NC
Transition Flow Zone
Upgradient
Downgradient
Source Area
Groundwater
Groundwater
K
Ah
Al
n 3
vs
vs
Gradient
Level hl (ft)1
Level h2 (ft)2
(ft/day)3
(ft)
(ft)°
a
(ft/day)
(ft/yr)
(Ah/AI)
East Ash Basin
530
430
1
100
5100
0.2
0.10
35.78
0.02
West Ash Basin
(Eastern)
530
400
1
130
6750
0.2
0.10
35.15
0.02
West Ash Basin
(Western)
500
410
1
90
5750
0.2
0.08
28.57
0.02
Transition Flow Zone
Geometric Mean 0.09 33 0.02
Average 0.09 33 0.02
Bedrock Flow Zone
Upgradient
Downgradient
Source Area
Groundwater
Groundwater
K
Ah
Al
n 3
vs
vs
Gradient
Level hl (ft)1
Level h2 (ft)2
(ft/day)3
(ft)
(ft)°
a
(ft/day)
(ft/yr)
(Ah/AI)
East Ash Basin
530
430
0.3
100
5100
0.05
0.12
42.94
0.02
West Ash Basin
(Eastern)
530
400
0.3
130
6750
0.05
0.12
42.18
0.02
West Ash Basin
(Western)
500
410
0.3
90
5750
0.05
0.09
34.28
0.02
Bedrock Flow Zone
Geometric Mean 0.11 40 0.02
Average 0.11 40 0.02
Prepared by: WCG Checked by: CDE
Notes:
' - Groundwater level shown corresponds to upgradient groundwater contour on Figures 3-1 through 3-2
Z - Groundwater level shown corresponds to downgradient groundwater contour on Figures 3-1 through 3-2
3 - Value taken from Preliminary Updated Groundwater Flow and Transport Modeling Report for Roxboro Steam Electric Plant, Semora, NC, November 2018 (SynTerra)
° - The length of a flow path between an upgradient and downgradient groundwater cantor within the same flow zone
dh/dl - horizontal hydraulic gradient (ft/ft)
ft - feet
h - water level height in feet
K - horizontal hydraulic conductivity
I - horizontal distance between wells
ne - effective porosity
vs - horizontal seepage velocity
Ah - difference in water level height between upgradient and downgradient locations
Al - horizontal distance between upgradient and downgradient locations
Page 1 of 1

TABLE 3-2
VERTICAL HYDRAULIC GRADIENTS
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Well ID
Monitoring
Zone
Reference
Cross -Section
Total 2,3
(Ft-BGS)
Water Level
4Q-2018
Vertical Gradient
and Flow Direction
Within the West Ash Basin
ABMW-01
Ash
A -A'
70.0
464.34
0.0137
Downward
ABMW-01BR
Bedrock
118.7
463.72
ABMW-02
Ash
B-B'
77.7
463.27
-0.0064
Upward
ABMW-02BR
Bedrock
103.6
463.45
West Ash Basin Dam
ABMW-03
Ash
A -A'
7.4
466.48
0.3599
Downward
ABMW-03BR
Bedrock
53.3
449.76
ABMW-03
Ash
A -A'
7.4
466.48
0.1614
Downward
ABMW-03BRL
Bedrock
244.4
428.60
North of West Ash Basin Dam
CW-05
Transition
A-A'
19.9
451.21
-0.0335
Upward
MW-05D
Transition
20.9
451.46
MW-05D
Transition
A -A'
20.9
451.46
0.3782
Downward
MW-05BR
Bedrock
70.0
432.62
MW-06D
Transition
A -A'
21.1
398.76
0.0004
Flat
MW-06BR
Bedrock
74.0
398.74
Within the East Ash Basin
GMW-8R
Bedrock
57.0
485.36
0.0494
Downward
MW-21BRLR
Bedrock
150.0
480.91
North of East Ash Basin Dam
MW-22D
Bedrock
C-C'
35.7
458.86
-0.0062
Upward
MW-22BR
Bedrock
71.2
459.07
GPMW-02D
Transition
C-C'
46.0
413.86
0.0114
Downward
GPMW-02BR
Bedrock
99.5
413.25
CCR-113D
Transition
D-D'
42.0
412.63
0.0382
Downward
CCR-113BR
Bedrock
78.0
411.27
Page 1 of 2

TABLE 3-2
VERTICAL HYDRAULIC GRADIENTS
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Total
Water Level
Vertical Gradient
Well ID
Monitoring
Reference
2,3
Zone
Cross -Section
(Ft-BGS)
4Q-2018
and Flow Direction
Upgradient or Background of the Ash Basins
BG-01BR
Bedrock
92.1
495.73
A -A'
0.0700
Downward
BG-2BR
Bedrock
235.0
485.72
BG-OIBRLR
Bedrock
160.3
482.17
A -A'
0.0055
Downward
BG-1BRL
Bedrock
275.3
481.53
MW-17BR
Bedrock
82.0
498.41
D-D'
0.1304
Downward
MW-24BR
Bedrock
155.8
486.93
Prepared by: WCG Checked by: CDE
Notes:
* - wells over 200 ft, total depth estimated
1 - Referenced Cross -Sections, see Figures 3-7 through 3-10
z "Boring Depth" is the total depth of soil boring; "Total Well Depth" is the depth to the bottom of the filter pack.
s Values measured during well installation
BGS - Below ground surface
dh/dl - difference in water level height and screen length between well 1 and well 2
NAVD 88 - North American Vertical Datum 1988
Page 2 of 2

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
pH
Water
Level
Temp
Spec
Cond
DO
ORP
Eh
Turbidity
Alkalinity
Bi-
carbonate
Alkalinity
Sulfide
Total
Organic
Carbon
Total
Suspended
Solids
Boron
Calcium
Chloride
Strontium
Sulfate
Total
Dissolved
Solids
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Iron
Lead
Reporting Units
S.U.
ft
Deg C
umhos/cm
mg/L
mV
mV
NTUs
mg/L
mg/L
mg/L
mg/L
mg/L
ug/L
mg/L
mg/L
ug/L
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02L Standard
6.5-8.5
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
700
NE
250
NE
250
500
NE
1*
10
700
4*
2
10
10
1*
1000
300
15
Background Threshold Values (Transition Zone)
6.3-7.6
NE
NE
NE
NE
NE
NE
NE
244
244
0.1
2.72
NE
50
106
150
760
37
540
1206
1
1
91
1
1
16.1
24.1
1
10
1173
1
Background Threshold Values (Bedrock Zone)
6.8-8.3
NE
NE
NE
NE
NE
NE
NE
317
317
0.1
3.6
NE
50
102
120
232
73.5
530
378
1
1
185
1
1
0.19
3.61
6.4
1
4227
1
Sample ID
Well Screen
Location
Sample
Collection Date
Analytical Results
ABMW-01
Ash Pore Water
01/30/2018
8.3
6.05
8
496
0.44
57
262
1.5
100
<5
1.2
7.2 B3
<5
12300
93.4
10
2090
210
400
3250
2.99
567
160
<1
<1
<0.025
<1
<1
<1
14
<1
ABMW-01
Ash Pore Water
04/10/2018
9.5
6.34
15
550
0.39
-52
153
1.0
91.6
31.9
0.58
6.3
<5
12200
92.6
11
2070
180
410
3220
3.18
527
153
<1
<1
0.18
<1
<1
<1
8.247j
<1
ABMW-01
Ash Pore Water
07/26/2018
9.6
6.25
21
535
0.31
-48
157
2.2
93.5
6.7
1.2
7
<5
12200
89.8
11
2100
170
370
3630
3.66
608
154
<1
0.34j
0.16
<1
<1
<1
24
<1
ABMW-01
Ash Pore Water
11/15/2018
9.7
5.51
8
499
0.37
-239
-34
3.7
104
<5
0.9
7.4
<5
12800
91.5
10
2100
200
370
3800
3.58
585
147
<1
0.382j
0.28 M1,R1
<1
<1
<1
6.032j
<1
ABMW-01BR
Bedrock
01/30/2018
7.1
7.09
11
495
0.39
-70
135
0.9
273
273
<0.1
0.55 S1
<5
455
69
15
173
20
340
6
<1
<1
31
<1
<1
<0.025
<1
<1
<1
1620
<1
ABMW-01BR
Bedrock
04/10/2018
6.8
7.21
16
556
0.29
-76
129
1.2
286
286
<0.1
0.519 S1
<5
576
68.1
16
179
21
340
9
<1
<1
31
<1
<1
0.1
<1
<1
0.785j
1620
<1
ABMW-01BR
Bedrock
07/26/2018
7.3
7.01
21
571
0.30
-38
167
0.5
264
264
<0.1
0.683
<5
549
67.6
16
185
20
320
6
<1
<1
31
<1
<1
<0.025
<1
<1
<1
1560
<1
ABMW-01BR
Bedrock
11/15/2018
7.1
6.28
8
510
0.53
-79
126
1.4
246
246
<0.1
0.51 S1
<5
558
68.8
15
178
19
320
4.988j
<1
<1
30
<1
<1
<0.025
<1
<1
<1
1570
<1
ABMW-02
Ash Pore Water
01/29/2018
8.4
7.11
12
457
0.39
-236
-31
5.5
119
119
<0.1
12
<5
5200
28.7
7.9
880
56
230
73
<1
494
350
<1
<1
<0.025
<1
<1
<1
2910
<1
ABMW-02
Ash Pore Water
04/10/2018
8.4
7.43
17
435
0.32
-198
7
3.9
116
116
<0.1
11
<5
5540
27.5
8.5
887
67
240
71
<1
447
342
<1
<1
<0.025
<1
0.396j
<1
679
<1
ABMW-02
Ash Pore Water
07/25/2018
8.4
7.52
25
751
0.11
12
217
1.9
123
121
<0.1
9.8
<5
6150
37.8
7.6
1210
76
240
167
0.365j
631
380
<1
<1
<0.025
<1
<1
<1
718
<1
ABMW-02
Ash Pore Water
11/15/2018
7.3
7.08
13
533
0.30
-115
90
8.4
185
185
<0.1
12
9
4870
41.1
7.2
1220
37
230
93
<1
567
515
<1
<1
<0.025
0.426j
0.423j
<1
4710
<1
ABMW-02BR
Bedrock
01/29/2018
9.6
7.10
13
266
0.31
-201
4
1.3
238
238
2.6
IA S1
<5
<50
92.2
27
598
71
430
54
<1
<1
194
<1
<1
<0.025
<1
<1
<1
173
<1
ABMW-02BR
Bedrock
04/10/2018
7.5
7.42
17
646
0.16
-261
-56
2.1
266
266
0.27
IA S1
<5
<50
105
28
519
82
430
6
<1
<1
150
<1
<1
0.034
<1
<1
<1
705
<1
ABMW-02BR
Bedrock
07/25/2018
7.6
7.51
25
1113
0.13
-28
177
0.4
243
243
0.37
1.3 S1
<5
<50
99.4
26
478
75
410
6
<1
0.517j
138
<1
<1
0.052
<1
0.355j
<1
666
<1
ABMW-02BR
Bedrock
11/15/2018
7.7
7.07
14
678
0.20
-165
40
3.7
221
221
0.5
1.3
<5
<50
112
29
541
91
410
9
<1
0.348j
162
<1
<1
0.036
<1
<1
<1
630
<1
ABMW-03
Ash Pore Water
01/29/2018
3.9
5.75
12
2897
2.98
307
512
1.7
<5
<5
<0.1
0.597 SI
<5
410
265
3.2
1680
2500
2400
125000
<1
7.66
14
31.7
4.3
<0.025 P4,R0
6.5
289
103
4440
<1
ABMW-03
Ash Pore Water
04/10/2018
3.4
6.67
13
1391
1.57
228
433
1.2
<5
<5
<0.1
0.296 SI
<5
217
137
4.6j
742
2000
1400
84400
<1
4.35
14
26.4
1.67
<0.025 P4,R0
4.6
108
37.5
4750
0.398j
ABMW-03
Ash Pore Water
07/26/2018
3.4
6.94
34
1263
0.35
24
229
1.1
<5
<5
<0.1
0.366
<5
223
114
4.54j
691
1700
1200
60200
<1
4.38
21
27.9
1.52
<0.025
3.88
95.2
22.2
13400
0.543j
ABMW-03
Ash Pore Water
11/14/2018
3.4
4.50
16
1300
1.13
345
550
5.4
<5
<5
<0.1
0.39 S1
<5
289
125
5.7
891
1500
1000
42600
<1
2.69
22
16.1
1.3
<0.025
4.98
97
23.5
9320
0.687j
ABMW-03BR
Bedrock
01/29/2018
5.5
23.96
13
3664
0.35
106
311
1.3
76.4
76.4
<0.1
0.848 S1
<5
3360
494
14
1980
2700
3900
1150
<1
<1
18
8.34
<1
<0.025
<1
275
<1
11400
<1
ABMW-03BR
Bedrock
04/10/2018
5.3
23.40
17
3577
0.33
70
275
3.5
86.5
86.5
<0.1
0.803 SI
<5
3080
472
15
1860
2600
4000
1060
<1
0.523j
18
7.34
0.631j
<0.025
<1
211
0.469j
7960
<1
ABMW-03BR
Bedrock
07/26/2018
5.6
23.53
33
3575
0.31
5
210
1.9
116
116
<0.1
1.2
<5
3450
464
17
1730
2500
4000
514
<1
<1
19
3.91
0.468j
<0.025 M1,R1
<1
134
<1
5790
<1
ABMW-03BR
Bedrock
11/14/2018
5.5
21.92
15
3214
0.41
101
306
9.9
51.9
51.9
<0.1
0.842 SI
<5
2770
433
10
1660
2800
3400
671
<1
0.341j
20
4.11
0.526j
<0.025 M1
0.347j
164
<1
6980
<1
ABMW-03BRL
Bedrock
01/29/2018
8.1
44.83
14
1088
0.44
-160
45
4.9
113
113
<0.1
0.545 SI
12
<50
184
9.7
818
490
870
232
<1
<1
29
<1
<1
<0.025 M1
<1
<1
<1
538
<1
ABMW-03BRL
Bedrock
04/10/2018
7.8
44.23
17
1182
2.34
-189
16
0.3
151
151
0.16
0.431 S1
19
28.394j
205 M4
11
831
540
940
5
<1
<1
29
<1
<1
<0.025
<1
<1
<1
647
<1
ABMW-03BRL
Bedrock
07/26/2018
7.8
44.67
27
1109
0.27
-13
192
1.2
87.6
87.6
0.14
0.41
6
<50
179
10
833
Soo
880
65
<1
<1
29
<1
<1
<0.025
<1
<1
<1
271
<1
ABMW-03BRL
Bedrock
11/14/2018
7.3
43.10
17
1035
0.88
-22
183
5.5
137
137
0.26
0.45 S1
<5
19.744j
198 M4
10
805
490
840
21
<1
<1
28
<1
<1
<0.025
0.616j
<1
<1
649
<1
ABMW-04
Ash Pore Water
01/31/2018
6.9
32.00
9
4128
0.35
-120
85
7.3
510
510
<0.1
1.2 S1
100
45400
506
83
9620
2100
3700
318
<1
957
39
<1
<1
<0.025
<1
6.32
<1
67200
<1
ABMW-04
Ash Pore Water
04/12/2018
6.9
31.24
16
4022
0.36
-133
72
9.5
476
476
<0.1
1.1 S1
120
44500
520
86
8940
2200
3700
303
<1
951
35
<1
<1
<0.025 M1,R1
<1
7.1
0.494j
70900
<1
ABMW-04
Ash Pore Water
07/26/2018
5.6
32.32
19
4097
1.48
-42
163
9.4
458
458
<0.1
1.2
110
45000
537
90
9140
2200
3800
76
<1
951
33
<1
<1
<0.025
<1
6.41
<1
71500
<1
ABMW-04BR
Bedrock
01/31/2018
6.7
32.00
12
423
0.33
-74
131
9.4
194
194
<0.1
0.617 S1
10
<50
40.5
9.5
182
20
250
235
<1
<1
132
<1
<1
<0.025
2.13
1.38
1.39 SI
4270
<1
ABMW-04BR
Bedrock
04/12/2018
6.7
31.26
15
425
0.55
-67
138
5.1
193
193
<0.1
0.556 SI
10
<50
41.4
9.6
176
19
220
240
<1
<1
100
<1
<1
<0.025
0.447j
0.811j
<1
5160
<1
ABMW-04BR
Bedrock
07/26/2018
6.2
31.10
20
434
2.55
84
289
9.8
183
183
<0.1
0.598
12
<50
39.3
9.9
183
20
230
376
<1
<1
95
<1
<1
<0.025
0.711j
<1
<1
3710
<1
ABMW-05
Ash Pore Water
01/31/2018
7.5
13.12
13
2908
0.21
-161
44
0.8
358 M1
358
<0.1
0.81 S1
12
28800
368
95
4770
1300
2300
16
<1
280
47
<1
<1
<0.025
<1
1.77
<1
4010
<1
ABMW-05
Ash Pore Water
04/11/2018
7.4
12.46
16
2719
0.17
-162
43
1.9
361
361
<0.1
0.71 SI
8
25300
360
110
4740
1200
2200
16
<1
295
45
<1
<1
<0.025
<1
1.5
<1
2980
<1
ABMW-05
Ash Pore Water
07/31/2018
7.2
12.62
20
2756
0.33
37
242
0.6
368
368
<0.1
0.71 S1
11
23500
372
100
4650
1300
2200
12
<1
330
46
<1
0.411j
<0.025
<1
1.71
<1
3400
<1
ABMW-05
Ash Pore Water
11/15/2018
7.4
9.70
11
2569
0.23
29
234
2.3
348
348
<0.1
0.71 S1
12
24800
407
99
5080
1400
2300
5
<1
339
46
<1
0.493j
<0.025
<1
1.19
<1
4520
<1
ABMW-05D
Transition Zone
01/31/2018
7.2
45.11
13
507
0.36
-182
23
9.9
205
205
<0.1
6
68
2710
40.8
18
460
8.3
250
135
1.09
2.88
150
<1
<1
<0.025
<1
<1
<1
30500
<1
ABMW-05D
Transition Zone
04/11/2018
7.7
44.68
16
521
0.02
-270
-65
9.9
213
213
<0.1
6.1
76
2800
43.8
17
463
6
220
SOS
0.691j
3.02
160
<1
<1
<0.025
0.872j
0.628j
<1
34800
<1
ABMW-05D
Transition Zone
07/30/2018
6.8
45.44
23
543
0.26
42
247
9.9
202
202
<0.1
6.4
60
2880
44.7
15
489
9.2
260
282
<1
2.86
165
<1
<1
<0.025
<1
0.619j
0.367j
34600
<1
ABMW-05D
Transition Zone
11/15/2018
6.8
43.55
12
556
0.15
84
289
8.7
193
193
<0.1
6.6
66
2980
49.3
15
517
16
240
95
<1
2.81
175
<1
<1
<0.025
0.345j
0.63j
<1
32700
<1
ABMW-06
Ash Pore Water
02/01/2018
7.6
12.53
13
1183
0.31
-172
33
6.6
430
430
1.3
9.2
10
3470
183
7.9
10800
220
780
39
<1
592
558
<1
<1
<0.025
<1
<1
<1
498
<1
ABMW-06
Ash Pore Water
04/11/2018
7.5
12.25
15
1227
0.58
-200
5
3.9
509
509
1.4
8.3
5
3430
200
7.7
11600
220
Soo
25
<1
570
617
<1
<1
<0.025
<1
<1
<1
869
<1
ABMW-06
Ash Pore Water
07/25/2018
7.1
12.11
24
1185
0.67
-25
180
4.6
505
505
0.72
8.8
6
2880
185
7.5
9890
170
740
17
<1
378
738
<1
<1
<0.025
<1
<1
<1
942
<1
ABMW-06
Ash Pore Water
11/15/2018
7.2
10.24
9
1141
0.27
-63
142
9.1
484
484
2
9.5
<5
2980
187
7.2
9880
140
700
15
<1
269
725
<1
<1
0.052
<1
<1
<1
501
<1
ABMW-06BR
Bedrock
02/01/2018
6.8
12.54
13
543
0.42
-47
158
0.8
229
229
<0.1
0.69 S1
<5
<50
61.8
9.6
206
61
330
9
<1
<1
35
<1
<1
<0.025
<1
<1
<1
56
<1
ABMW-06BR
Bedrock
04/11/2018
6.6
12.28
16
539
0.30
-77
128
1.9
239
239
<0.1
0.58 S1
<5
<50
61.5
9.3
203
60
310
10
<1
<1
41
<1
<1
<0.025
<1
0.462j
<1
103
<1
ABMW-06BR
Bedrock
07/25/2018
6.4
12.12
22
538
0.60
52
257
2.3
211
211
<0.1
0.64 S1
<5
<50
60.2
4.2
200
64
330
10
<1
3.57
35
<1
<1
<0.025
<1
0.388j
<1
77
<1
ABMW-06BR
Bedrock
11/15/2018
6.8
10.25
9
524
0.33
65
270
4.2
203
203
<0.1
0.75 S1
<5
<50
65.2
9.5
216
60
320
7
<1
<1
37
<1
<1
<0.025
<1
0.425j
<1
86
<1
ABMW-07BR
Bedrock
01/31/2018
7.2
15.94
12
625
0.36
-78
127
0.4
260
260
<0.1
1 S1
<5
1460
82.2
13
248
110
420
7
<1
<1
17
<1
<1
<0.025
<1
<1
<1
189
<1
ABMW-07BR
Bedrock
04/11/2018
6.9
15.08
15
675
0.35
-67
138
0.3
244
244
<0.1
0.852 SI
<5
1480
80.6
14
241
130
420
4.511j
<1
<1
16
<1
<1
<0.025 M1,R1
<1
1.75
<1
225
<1
ABMW-07BR
Bedrock
07/25/2018
6.8
15.02
21
668
0.68
91
296
2.0
219
219
<0.1
0.893 SI
<5
1550
78.3
13
235
110
430
3.054j
<1
<1
15
<1
<1
<0.025
<1
1.12
<1
168
<1
ABMW-07BR
Bedrock
11/14/2018
6.9
12.55
14
675
0.52
131
336
2.9
222
222
<0.1
0.857 SS
<5
1550
80
14
241
110
420
16
<1
<1
16
<1
<1
<0.025
<1
1.65
<1
211
<1
Page 1 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Lithium
Magnesium
Manganese
Mercury
Molybdenum
Nickel
Nitrate +
Nitrite
Potassium
Selenium
Sodium
Thallium
Vanadium
Zinc
Aluminum
(0.45u)
Antimony
(0.45u)
Arsenic
(0.45u)
Barium
(0.45u)
Beryllium
(0.45u)
Boron
(0.45u)
Cadmium
(0.45u)
Chromium
(0.45u)
Cobalt
(0.45u)
Copper
(0.45u)
Iron
(0.45u)
Lead
(0.45u)
Lithium
(0.45u)
Manganese
(0.45u)
Reporting Units
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02L Standard
NE
NE
50
1
NE
100
NE
NE
20
NE
0.2*
0.3*
1000
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Background Threshold Values (Transition Zone)
NE
42.3
405
0.05
4.17
5.22
3.4
4.69
1.78
36
0.2
30.2
12
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Background Threshold Values (Bedrock Zone)
NE
31.5
1198
0.05
35.2
2.11
0.295
9.28
1
37.6
0.2
2.49
7
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Well Screen
Location
Sample
Collection Date
Analytical Results
ABMW-01
Ash Pore Water
01/30/2018
13
0.462
<5
<0.05
2180
2.92
<0.1
12.7
4.75
13.1 B2„B3
<0.2
2.19
<5
3490
3.57
631
157
<1
12000
<1
<1
<1
<1
<10
<1
11
<5
ABMW-01
Ash Pore Water
04/10/2018
13
0.462
5
<0.05
2040
2.57
0.524
12.3
4.79
11.8
<0.2
2.75
2.305j
3220
3.71
578
156
<1
11800
<1
<1
<1
<1
<10
<1
15
4.498j
ABMW-01
Ash Pore Water
07/26/2018
15
0.411
3.7j
<0.05
2320
2.71
0.049
13.2
5.5
11.2
<0.2
2.1
5
3720
3.66
609
149
<1
12300
<1
<1
<1
<1
14
<1
13
3.405j
ABMW-01
Ash Pore Water
11/15/2018
18
0.442
3.382j
<0.05
2160
2.59
<0.1
13.4
5.66
11
<0.2
1.37
<5
3760
2.49
587
141
<1
12400
0.351j
<1
<1
<1
<10
<1
18
3.153j
ABMW-01BR
Bedrock
01/30/2018
5
18.4
969
<0.05
2.22
<1
<0.01
6.68
<1
20.4 B2„B3
<0.2
<0.3
<5
<5
<1
<1
31
<1
476
<1
<1
<1
<1
1560
<1
<5
983
ABMW-01BR
Bedrock
04/10/2018
3.959j
17.9
1040
<0.05
2.57
1.47
0.0047j
6.67
<1
20.3
<0.2
0.129j
3.07j
3.528j
<1
<1
29
<1
510
<1
<1
<1
<1
1400
<1
5
856
ABMW-01BR
Bedrock
07/26/2018
4.071j
18.2
1000
<0.05
2.46
<1
0.0053j
6.63
<1
21.1
<0.2
0.25j
<5
3.435j
<1
<1
30
<1
560
<1
<1
<1
<1
1570
<1
2.78j
1010
ABMW-01BR
Bedrock
11/15/2018
3.699j
18.2
1010
<0.05
2.3
<1
0.0034j
6.45
<1
20.4
<0.2
0.131j
<5
3.625j
<1
<1
30
<1
562
<1
<1
<1
<1
1570
<1
3.189j
1010
ABMW-02
Ash Pore Water
01/29/2018
41
8.5
483
<0.05
350
<1
<0.01
27.4
1.11
8.92
<0.2
1.68
<5
40
<1
495
373
<1
4840
<1
<1
<1
<1
2320
<1
30
418
ABMW-02
Ash Pore Water
04/10/2018
44 B2
8.02
294
<0.05
402
0.825 j
0.0042 j
29.6
1.14
9.34
<0.2
1.42
<5
64
<1
459
307
<1
5050
<1
<1
0.376 j
0.656 j
477
<1
29
249
ABMW-02
Ash Pore Water
07/25/2018
26
8.85
368
<0.05
464
1.08
0.0044 j
22.3
1.52
8.8
<0.2
1.19 sl
1.78 j
245
0.403 j
598
405
<1
6450
<1
<1
<1
<1
81
<1
20
400
ABMW-02
Ash Pore Water
11/15/2018
47
11.8 B2
1010
<0.05
240
<1
0.005j
32.8
0.901j
11.2
<0.2
2.33
3.141j
146
<1
568
368
<1
5820
<1
<1
<1
<1
1080
<1
35
368
ABMW-02BR
Bedrock
01/29/2018
13
9.15
1050
<0.05
6.9
<1
<0.01
7.5
<1
25.1
<0.2
0.397
<5
6
<1
<1
172
<1
<50
<1
<1
<1
<1
538
<1
<5
1350
ABMW-02BR
Bedrock
04/10/2018
9 B2
9.81
1360
<0.05
10.8
<1
<0.01
6.54
<1
22.6
<0.2
0.351
<5
4.661j
<1
<1
114
<1
<50
<1
<1
<1
<1
606
<1
3.916j
1250
ABMW-02BR
Bedrock
07/25/2018
5
9.49
1180
<0.05
7.92
<1
0.0042j
6.18
<1
22.8
0.159j
0.633 S1
<5
5
<1
<1
121
<1
<50
<1
<1
<1
<1
651
<1
5
1140
ABMW-02BR
Bedrock
11/15/2018
5
10 B2
1030
<0.05
9.39
<1
<0.01
6.35
<1
24.1
0.107j
0.294j
<5
7
<1
<1
112
<1
<50
<1
<1
<1
<1
602
<1
3.843j
964
ABMW-03
Ash Pore Water
01/29/2018
311
109
15900
<0.05
<1
607
0.013
17.5
8.37
151 B3
4.52
2.21
956
109000
<1
7.84
14
27.3
363
3.75
5.81
251
86.2
6020
<1
250
12700
ABMW-03
Ash Pore Water
04/10/2018
148
48
7410
<0.05
<1
264
0.018
10.2
1.73
6.48
2.09
2.77
449
79600
<1
4.95
14
24.1
206
1.55
4.76
100
29
6130
0.357j
154
7080
ABMW-03
Ash Pore Water
07/26/2018
164
41.7
6720
<0.05
<1
248
0.032
10.9
1.24
5.7
2.65
2.86
496
61300
<1
6.98
22
24.9
248
1.17
4.58
91.1
14.6
24200
0.472j
184
6860
ABMW-03
Ash Pore Water
11/14/2018
167
38.5 B2
5860
0.029j
<1
232
0.025
13.6
0.617j
9.03
3.16
1.76
406
42200
<1
3.1
22
16.3
290
1.22
4.22
94.6
23.6
12500
0.597j
168
5970
ABMW-03BR
Bedrock
01/29/2018
261
281
24600
<0.05
<1
489
0.018
10.3
<1
146 B3
<0.2
2.68
305
528
<1
<1
20
4.55
3820
<1
<1
159
<1
7220
<1
160
17500
ABMW-03BR
Bedrock
04/10/2018
214
266
19700
<0.05
0.189j
406
0.01
10.8
<1
141
0.108j
2.32
210
402
<1
0.34j
19
2.27
3750
0.353j
<1
103
<1
4310
<1
140
15000
ABMW-03BR
Bedrock
07/26/2018
158
268
17500
<0.05
0.204j
349
0.019
10.7
<1
157
<0.2
2.42
127
236
<1
0.546j
21
2.83
4280
0.508j
0.387j
71.1
<1
2890
<1
110
14800
ABMW-03BR
Bedrock
11/14/2018
185
252
18700
0.02j
0.238j
358
0.0068j
9.91
<1
134
0.166j
2.4
174
489
<1
<1
20
2.92
3190
0.397j
<1
118
<1
5340
<1
148
17000
ABMW-03BRL
Bedrock
01/29/2018
26
24
46
<0.05
1.97
<1
<0.01
9.52
<1
40.5 B3
<0.2
0.308
<5
<5
<1
<1
29
<1
<50
<1
<1
<1
<1
156
<1
<5
81
ABMW-03BRL
Bedrock
04/10/2018
7
23.7
204
<0.05
1.69
<1
<0.01
6.38
<1
35.4
<0.2
<0.3
<5
2.082j
<1
<1
29
<1
29.944j
<1
<1
<1
<1
684
<1
9
174
ABMW-03BRL
Bedrock
07/26/2018
6
23.4
19
<0.05
1.62
0.345j
0.0049j
5.66
<1
33.4
<0.2
0.267j
<5
2.543j
<1
<1
30
<1
18.9j
<1
<1
<1
<1
558
<1
7
168
ABMW-03BRL
Bedrock
11/14/2018
6
21.4 B2
163
0.017j
1.8
<1
<0.01
5.56
<1
32.6
<0.2
0.278j
10
3.608j
<1
<1
28
<1
19.409j
<1
2.21
<1
0.388j
645
<1
6
172
ABMW-04
Ash Pore Water
01/31/2018
7580
225
11800
<0.05
650
4.9
0.032
74.3
<1
206
<0.2
2.15
<5
87
<1
944
34
<1
44700
<1
<1
6.16
<1
68400
<1
7290
11600
ABMW-04
Ash Pore Water
04/12/2018
7860
229
11900
<0.05
691
5.16
0.014 M2
74.7
<1
221
0.18j
2.2
8
47
<1
984
34
<1
44200
<1
<1
6.23
<1
69000
<1
7990
11000
ABMW-04
Ash Pore Water
07/26/2018
8290
227
12300
<0.05
774
4.98
0.017
68.4
<1
213
0.125j
1.63
4.233j
53
<1
912
31
<1
43900
<1
<1
5.46
<1
65500
<1
7970
12200
ABMW-04BR
Bedrock
01/31/2018
<5
17.3
2330
<0.05
2.9
<1
<0.01
3.38
<1
16.5
<0.2
0.442
<5
7
<1
<1
131
<1
<50
<1
<1
1.31
<1
3760
<1
<5
2270
ABMW-04BR
Bedrock
04/12/2018
<5
17
1860
<0.05
2.73
<1
0.0099j
3.48
<1
16.3
<0.2
0.465
4.513j
4.735j
<1
<1
110
<1
<50
<1
<1
0.684j
<1
3930
<1
4.617j
1820
ABMW-04BR
Bedrock
07/26/2018
2.928j
16.1
1570
<0.05
4.9
<1
0.015
3.31
<1
17
<0.2
0.635
3.985j
5
<1
<1
105
<1
<50
<1
<1
0.557j
<1
3470
<1
1.972j
1910
ABMW-05
Ash Pore Water
01/31/2018
8290
95.3
1990
<0.05
3010
1.79
<0.01
134
<1
132 B2„B3
<0.2
0.515
<5
9
<1
278
45
<1
27100
<1
<1
1.35
1.72
4720
<1
7840
1870
ABMW-05
Ash Pore Water
04/11/2018
7560
90.2
1730
<0.05
2450
1.91
<0.01
119
<1
116
<0.2
0.421
<5
8
<1
310
42
<1
24400
0.371j
<1
1.22
<1
3540
<1
7260
1480
ABMW-05
Ash Pore Water
07/31/2018
7170
96.7
1550
<0.05
2830
1.89
0.0043j
117
<1
113
<0.2
0.753 B2
<5
10
<1
337 M1
44
<1
22500
0.412j
<1
1.32
<1
4730
<1
7020
1510
ABMW-05
Ash Pore Water
11/15/2018
7470
105
1570
<0.05
3020
1.46
0.017
124
<1
117
<0.2
0.677
<5
4.981j
<1
382
46
<1
24400
0.458j
<1
1.18
<1
4920
<1
7600
1510
ABMW-05D
Transition Zone
01/31/2018
12
13.2
5810
<0.05
23.7
4.52
0.014
13.6
<1
16.6 B2„B3
<0.2
0.672
6
36
1.02
2.38
134
<1
2580
<1
<1
<1
<1
25700
<1
14
5240
ABMW-05D
Transition Zone
04/11/2018
3.855j
14.5
6290
<0.05
16.7
3.35
0.021
7.69
<1
13.3
<0.2
0.559
<5
38
0.361j
2.83
151
<1
2680
<1
<1
0.587j
<1
32700
<1
3.769j
6060
ABMW-05D
Transition Zone
07/30/2018
1.949j
14.9
6380
<0.05
12.1
0.939j
0.033
4.9
<1
12.3 B2
<0.2
1.14
<5
31
<1
2.86
158
<1
2880
<1
<1
0.504j
<1
33300
<1
<5
6600
ABMW-05D
Transition Zone
11/15/2018
<5
16.1
6630
<0.05
10
0.917j
0.038
4.61
<1
13.7
<0.2
0.726
<5
23
<1
2.84
166
<1
2970
<1
<1
0.512j
<1
32500
<1
<5
6770
ABMW-06
Ash Pore Water
02/01/2018
10
43.2
647
<0.05
13.2
<1
<0.01
15.6
<1
11
<0.2
0.995
<5
16
<1
353
684
<1
3020
<1
<1
<1
<1
4240
<1
11
1050
ABMW-06
Ash Pore Water
04/11/2018
10
45.9
731
<0.05
19
<1
<0.01
12.4
0.804 j
9.7
<0.2
1.12
<5
13
<1
436
562
<1
3180
<1
0.425 j
<1
<1
983
<1
9
749
ABMW-06
Ash Pore Water
07/25/2018
8
45.9
975
<0.05
10.5
0.595j
0.0035j
11.2
0.526j
10.5
<0.2
1.46 S1
1.709j
12
<1
271
676
<1
3040
<1
<1
<1
<1
1400
<1
11
942
ABMW-06
Ash Pore Water
11/15/2018
8
46.6 B2
1060
<0.05
4.29
<1
<0.01
11.7
0.473j
11.1
<0.2
1.56
<5
8
<1
171
667
<1
2970
<1
<1
<1
<1
290
<1
8
1030
ABMW-06BR
Bedrock
02/01/2018
<5
21
742
<0.05
2.14
2.24
<0.01
5.97
<1
21.4
<0.2
0.36
<5
<5
<1
<1
38
<1
<50
<1
<1
<1
<1
78
<1
<5
764
ABMW-06BR
Bedrock
04/11/2018
<5
20.7
804
<0.05
2.15
2.31
<0.01
5.65
<1
19.4
<0.2
0.372
<5
1.886j
<1
<1
41
<1
<50
<1
<1
0.445j
<1
100
<1
2.257j
803
ABMW-06BR
Bedrock
07/25/2018
1.916 j
20.2
717
<0.05
2.06
1.95
<0.01
5.43
<1
19
<0.2
0.419 S1
<5
1.701 j
<1
<1
41
<1
<50
<1
<1
0.43 j
<1
89
<1
2.974 j
741
ABMW-06BR
Bedrock
11/15/2018
<5
21.4 B2
746
<0.05
1.95
2.11
<0.01
5.66
<1
20.2
<0.2
0.474
2.537j
1.672j
<1
<1
38
<1
<50
<1
<1
0.411j
<1
80
<1
<5
734
ABMW-07BR
Bedrock
01/31/2018
<5
30.6
507
<0.05
1.43
<1
<0.01
4.36
<1
17.9
<0.2
0.384
<5
<5
<1
<1
16
<1
1120
<1
<1
<1
<1
226
<1
<5
446
ABMW-07BR
Bedrock
04/11/2018
<5
30.6
485
<0.05
1.18
<1
0.0076j
4.05
<1
16.5
<0.2
0.201j
<5
2.1j
<1
<1
16
<1
1610
<1
<1
1.22
<1
183
<1
2.034j
502
ABMW-07BR
Bedrock
07/25/2018
<5
29.7
476
<0.05
1.14
0. 507 j
<0.01
4.04
<1
16.5
0.15 j
0.455 S1
<5
2. 155 j
<1
<1
15
<1
1640
<1
<1
0.802 j
<1
157
<1
3.349 j
498
ABMW-07BR
Bedrock
11/14/2018
1.797j
30
458
<0.05
1.08
<1
<0.01
4.18
<1
16.5
<0.2
0.352
<5
<5
<1
<1
15
<1
1670
<1
<1
0.993j
<1
166
<1
2.462j
495
Page 2 of 18

Analytical Parametei
Reporting Units
15A NCAC 02L Standard
Background Threshold Values (Transition Zone)
Background Threshold Values (Bedrock Zone)
Sample ID
Well Screen
Location
Sample
Collection Date
ABMW-01
Ash Pore Water
01/30/2018
ABMW-01
Ash Pore Water
04/10/2018
ABMW-01
Ash Pore Water
07/26/2018
ABMW-01
Ash Pore Water
11/15/2018
ABMW-01BR
Bedrock
01/30/2018
ABMW-01BR
Bedrock
04/10/2018
ABMW-01BR
Bedrock
07/26/2018
ABMW-01BR
Bedrock
11/15/2018
ABMW-02
Ash Pore Water
01/29/2018
ABMW-02
Ash Pore Water
04/10/2018
ABMW-02
Ash Pore Water
07/25/2018
ABMW-02
Ash Pore Water
11/15/2018
ABMW-02BR
Bedrock
01/29/2018
ABMW-02BR
Bedrock
04/10/2018
ABMW-02BR
Bedrock
07/25/2018
ABMW-02BR
Bedrock
11/15/2018
ABMW-03
Ash Pore Water
01/29/2018
ABMW-03
Ash Pore Water
04/10/2018
ABMW-03
Ash Pore Water
07/26/2018
ABMW-03
Ash Pore Water
11/14/2018
ABMW-03BR
Bedrock
01/29/2018
ABMW-03BR
Bedrock
04/10/2018
ABMW-03BR
Bedrock
07/26/2018
ABMW-03BR
Bedrock
11/14/2018
ABMW-03BRL
Bedrock
01/29/2018
ABMW-03BRL
Bedrock
04/10/2018
ABMW-03BRL
Bedrock
07/26/2018
ABMW-03BRL
Bedrock
11/14/2018
ABMW-04
Ash Pore Water
01/31/2018
ABMW-04
Ash Pore Water
04/12/2018
ABMW-04
Ash Pore Water
07/26/2018
ABMW-04BR
Bedrock
01/31/2018
ABMW-04BR
Bedrock
04/12/2018
ABMW-04BR
Bedrock
07/26/2018
ABMW-05
Ash Pore Water
01/31/2018
ABMW-05
Ash Pore Water
04/11/2018
ABMW-05
Ash Pore Water
07/31/2018
ABMW-05
Ash Pore Water
11/15/2018
ABMW-05D
Transition Zone
01/31/2018
ABMW-05D
Transition Zone
04/11/2018
ABMW-05D
Transition Zone
07/30/2018
ABMW-05D
Transition Zone
11/15/2018
ABMW-06
Ash Pore Water
02/01/2018
ABMW-06
Ash Pore Water
04/11/2018
ABMW-06
Ash Pore Water
07/25/2018
ABMW-06
Ash Pore Water
11/15/2018
ABMW-06BR
Bedrock
02/01/2018
ABMW-06BR
Bedrock
04/11/2018
ABMW-06BR
Bedrock
07/25/2018
ABMW-06BR
Bedrock
11/15/2018
ABMW-07BR
Bedrock
01/31/2018
ABMW-07BR
Bedrock
04/11/2018
ABMW-07BR
Bedrock
07/25/2018
ABMW-07BR
Bedrock
11/14/2018
TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Mercury
(0.45u)
Molybdenum
(0.45u)
Nickel
(0.45u)
Phosphorus
(0.45u)
Selenium
(0.45u)
Silver
(0.45u)
Strontium
(0.45u)
Thallium
(0.45u)
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
<0.05
2270
2.78
0.059
5.8
NA
2090
<0.2
<0.05
2300
2.67
<0.05
5.22
NA
2070
<0.2
<0.05
2200
2.52
<0.05
5.32
NA
2070
<0.2
<0.05
2210
1.83
<0.05
5.5
NA
2030
<0.2
<0.05
2.15
<1
<0.05
<1
NA
178
<0.2
<0.05
2.31
<1
<0.05
<1
NA
158
<0.2
<0.05
1.93
<1
<0.05
<1
NA
178
<0.2
<0.05
2.06
<1
<0.05
<1
NA
176
<0.2
<0.05 M2
361
<1
0.085
<1
NA
880
<0.2
<0.05
397
0.872 j
0.091
1.07
NA
809
<0.2
<0.05
506
1.43
0.08
1.56
NA
1360
<0.2
<0.05
377
0.887 j
0.11
1.16
NA
1130
<0.2
<0.05
8.61
<1
<0.05
<1
NA
549
<0.2
<0.05
10.9
<1
<0.05
<1
NA
436
<0.2
<0.05
9.45
<1
<0.05
<1
NA
475
<0.2
0.025 j,D2
10.5
<1
<0.05
<1
NA
474
<0.2
<0.05
<1
549
<0.05
7.14
NA
1460
3.58
<0.05
<1
253
<0.05
1.3
NA
768
1.64
<0.05
<1
232
<0.05
0.896j
NA
765
2.07
<0.05
<1
228
<0.05
0.57 j
NA
899
2.78
<0.05
<1
358
<0.05
<1
NA
1900
<0.2
<0.05
0.19j
290
<0.05
<1
NA
1720
0.084j
<0.05
0.533j
288
<0.05
<1
NA
1780
0.352
<0.05
0.18 j
308
<0.05
<1
NA
1620
<0.2
<0.05
1.33
<1
<0.05
<1
NA
836
<0.2
<0.05
1.6
<1
<0.05
<1
NA
853
0.111 j
<0.05
1.59
<1
<0.05
<1
NA
839
<0.2
<0.05
1.71
1.01
<0.05
<1
NA
807
<0.2
<0.05 M2
634
4.54
0.085
<1
NA
8950
<0.2
<0.05
709
5.03
0.057
<1
NA
9560
0.088j
<0.05
758
5.32
<0.05
<1
NA
8470
0.225
<0.05
2.84
<1
<0.05
<1
NA
183
<0.2
<0.05
2.98
<1
<0.05
<1
NA
177
<0.2
<0.05
4.65
<1
<0.05
<1
NA
183
<0.2
<0.05
2940
1.4
<0.05
<1
NA
4450
<0.2
<0.05
2290
1.48
<0.05
<1
NA
4400
<0.2
<0.05
2720 M4
1.49
<0.05
<1
NA
4160
<0.2
<0.05
3160
1.35
<0.05
<1
NA
5120
<0.2
<0.05
26.6
4.59
0.32
<1
NA
411
<0.2
<0.05
16.5
1.5
0.43
<1
NA
457
<0.2
<0.05
11.5
0.62 j
0.4
<1
NA
487
<0.2
<0.05
9.98
0.334 j
0.39
<1
NA
513
<0.2
<0.05
16.9
<1
0.084
<1
NA
8800
<0.2
<0.05
14.9
<1
0.093
0.6 j
NA
11700
<0.2
<0.05
8.64
<1
0.08
0.486 j
NA
10400
<0.2
<0.05
6.04
<1
0.095
0.407 j
NA
9900
<0.2
<0.05
2.09
2.42
<0.05
<1
NA
196
<0.2
<0.05
1.98
2.3
<0.05
<1
NA
206
<0.2
<0.05
2.2
2.13
<0.05
<1
NA
210
<0.2
<0.05
1.84
2.12
<0.05
<1
NA
209
<0.2
<0.05
1.28
<1
<0.05
<1
NA
234
<0.2
<0.05
1.11
<1
<0.05
<1
NA
235
<0.2
<0.05
1.2
<1
<0.05
<1
NA
225
<0.2
<0.05
1.1
<1
<0.05
<1
NA
236
<0.2
Vanadium Zinc
(0.45u) (0.45u)
ug/L ug/L
NE NE
NE NE
NE NE
Analytical Results
1.51 <5
1.94 <5
1.82 2.111 j
1.62 <5
<0.3 <5
<0.3 2.178 j
0. 108 j <5
0.245 j <5
0.98 <5
0.795 <5
0.989 <5
1.14 <5
<0.3 <5
0. 199 j <5
0.247 j <5
0.229 j <5
2.09 750
3.18 458
4.36 482
1.74 395
2.25 141
1.91 105
2.51 73
2.15 114
<0.3 <5
<0.3 <5
<0.3 <5
0.245 j 3.505 j
1.25 <5
1.26 <5
1.27 5
<0.3 <5
<0.3 <5
0. 132 j 2.107 j
0.391 <5
0.452 <5
0.962 <5
1.18 1.674 j
<0.3 <5
0.343 2.872j
0.343 <5
0.544 <5
0.971 <5
0.933 2.733 j
1.19 <5
1.39 <5
<0.3 <5
0. 185 j 1.998 j
0.179 j <5
0.124 j <5
<0.3 11
0. 157 j <5
0. 159 j <5
0.54 <5
RADIONUCLIDES
OTHER PARAMETERS
Radium
Radium-228
Total
Radium
Uranium-238
Total
Uranium
Carbonate-226
Alkalinity
Fluoride
Hardness
Phosphorus
pCi/L
pCi/L
pCi/L
ug/mL
ug/mL
mg/L
mg/L
mg/L
mg/L
NE
NE
5^
NE
0.03^
NE
2
NE
NE
NE
NE
5.45
NE
0.00516
5
NE
NE
NE
NE
NE
5.21
NE
0.00324
5
NE
NE
NE
0.25 U
-0.073 U
0.177
NA
<0.0002
96.1
0.51
NA
<0.05
0.52 U
0.0872 U
0.6072
NA
<0.0002
59.7
0.67
NA
<0.05
0. 142 U
0.0895 U
0.2315
NA
<0.0002
86.7
0.52
NA
<0.05
0.469
0.467 B
0.936
<0.0002
<0.0002
119
0.285j
NA
<0.05
1.7
1.02
2.72
NA
<0.0002
<5
0.1
NA
<0.05
2.36
1.29
3.65
NA
<0.0002
<5
0.16
NA
<0.05
0.48
1.12
1.6
NA
<0.0002
<5
0.12
NA
<0.05
0.0522 U
1.18 B
1.2322
<0.0002
<0.0002
<5
0.067 j
NA
<0.05
0.541
-0.116 U
0.425
NA
0.00021
<5
1.1
NA
0.078
0.276 U
-0.129 U
0.147
NA
0.000203
<5
1.3
NA
0.1
0.131 U
0.345 U
0.476
NA
0.000465
<5
1.2
NA
0.13
0.588
0.655 B
1.243
0.00119
0.00119
<5
1.1
NA
0.11
1.07
0.458 U
1.528
NA
0.0001 j
<5
0.29
NA
<0.05
-0.0403 U
0.24 U
0.1997
NA
0.000564
<5
0.25
NA
<0.05
0.346
0.492
0.838
NA
0.000489
<5
0.21
NA
<0.05
0.577
0.451 U
1.028
0.000825
0.000825
<5
0.18
NA
<0.05
NA
NA
NA
NA
NA
<5
2.7
NA
<0.05
NA
NA
NA
NA
NA
<5
3.025 j,S1
NA
<0.05
NA
NA
NA
NA
NA
<5
2.885 j
NA
<0.05
NA
NA
NA
NA
NA
<5
<5
NA
<0.05
NA
NA
NA
NA
NA
<5
<5
NA
<0.05
NA
NA
NA
NA
NA
<5
2.415 j,S1
NA
<0.05
NA
NA
NA
NA
NA
<5
2.68 j
NA
<0.05
NA
NA
NA
NA
NA
<5
<5
NA
<0.05
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
NA
NA
NA
NA
NA
<5
0.629 j
NA
<0.05
NA
NA
NA
NA
NA
<5
0.642 j
NA
<0.05
NA
NA
NA
NA
NA
<5
0.497 j
NA
<0.05
0.154 U
0.33 U
0.484
NA
0.0258
<5
<5
NA
0.094
0.588
0.497 U
1.085
NA
0.025
<5
2.91 j,S1
NA
0.054
0.204 U
0.539
0.743
NA
0.0241
<5
<5
NA
<0.05 M1
1.59
0.327 U
1.917
NA
0.000207
<5
0.18
NA
<0.05
0.359
0.208 U
0.567
NA
0.000248
<5
0.2
NA
<0.05
0.0533 U
0. 166 U
0.2193
NA
0.000117j
<5
0.17
NA
<0.05
0.0379 U
-0.0107 U
0.0272
NA
0.00275
<5
<5
NA
<0.05
0.248 U
0.26 U
0.508
NA
0.00702
<5
<5
NA
<0.05
-0.0905 U
0.277 U
0.1865
NA
0.00821
<5
<5
NA
<0.05
0.0538 U
0.322 U
0.3758
0.00665
0.00665
<5
<2
NA
<0.05
0.329 U
-0.0308 U
0.2982
NA
<0.0002
<5
0.29
NA
0.57
0.765
0.397 U
1.162
NA
0
<5
0.3
NA
0.53
0.999
0. 121 U
1.12
NA
<0.0002
<5
0.29
NA
0.55
0.23 U
0.328 U
0.558
<0.0002
<0.0002
<5
0.29
NA
0.52
NA
NA
NA
NA
NA
<5
0.63
NA
0.1
NA
NA
NA
NA
NA
<5
0.55
NA
0.093
NA
NA
NA
NA
NA
<5
0.53
NA
0.086
NA
NA
NA
NA
NA
<5
0.55
NA
0.092
NA
NA
NA
NA
NA
<5
0.22
NA
<0.05
NA
NA
NA
NA
NA
<5
0.13
NA
<0.05
NA
NA
NA
NA
NA
<5
0.17
NA
<0.05
NA
NA
NA
NA
NA
<5
0.12
NA
<0.05
NA
NA
NA
NA
NA
<5
<0.5
NA
<0.05
NA
NA
NA
NA
NA
<5
<0.5
NA
<0.05
NA
NA
NA
NA
NA
<5
0. 1412 j
NA
<0.05
NA
NA
NA
NA
NA
<5
0. 1084 j
NA
<0.05
Page 3 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
PH
8.2
Water
Level
24.10
Temp
12
Spec
Coed
655
DO
0.92
ORP
-139
Eh
66
Turbidity
0.9
Alkalinity
131
Bi-
carbonate
Alkalinity
131
Sulfide
0.58
Total
Organic
Carbon
1 SS
Total
Suspended
Solids
<5
Boron
140
Calcium
86
Chloride
12
Strontium
680
Sulfate
220
Total
Dissolved
Solids
490
Aluminum
17
Antimony
<1
Arsenic
2.2
Barium
18
Beryllium
<1
Cadmium
<1
Chromium
(VI)
<0.025
Chromium
<1
Cobalt
<1
Copper
<1
Iron
141
Lead
<1
ABMW-07BRL
Bedrock
01/31/2018
ABMW-07BRL
Bedrock
04/11/2018
7.3
1 23.36
14
833
0.83
-89
116
1.0
205
205
<0.1
0.855 SI
<5
224
115
16
873
270
550
10
<1
0.515j
13
<1
<1
<0.025
<1
<1
<1
249
<1
ABMW-07BRL
Bedrock
07/25/2018
7.2
23.37
21
811
1.30
73
278
3.6
167
167
0.25
0.751 SI
<5
173
111
14
825
250
560
5
<1
0.729j
14
<1
<1
0.033
<1
<1
<1
272
<1
ABMW-07BRL
Bedrock
11/14/2018
7.5
21.09
11
801
1.02
44
249
1.1
152
152
0.28
10.838SI
<5
157
105
14
804
250
530
4.072j
<1
0.888j
15
<1
<1
<0.025
<1
<1
<1
244
<1
BG-01
Transition Zone
01/29/2018
6.8
39.43
12
532
5.47
86
291
8.4
249
249
<0.1
0.877 S1
5
<50
45.3
17
445
17
330
167
<1
<1
83
<1
<1
4.7
5.49
<1
1.52
183
<1
BG-01 IMP
Transition Zone
04/09/2018
6.4
39.24
18
551
3.66
123
328
5.7
230
230
<0.1
0.763 SI
<5
<50
45.2
18
469
18
340
268
<1
<1
94
<1
<1
2.5
2.88
<1
1.8
215
<1
BG-01 IMP
Transition Zone
07/25/2018
6.3
38.51
18
564
4.13
322
527
1.0
253
253
<0.1
0.878 SI
<5
<50
46.6
19
455
17
330
24
<1
<1
88
<1
<1
2.3
2.4
<1
1.1
24
<1
BG-01 IMP
Transition Zone
11/14/2018
6.5
37.74
14
565
4.34
517
722
1.3
234
234
<0.1
0.745 S1
<5
<50
44.5
19
458
18
330
20
<1
<1
89
<1
<1
2.2
2.09 B2
<1
0.704j
17
<1
BG-01BR
Bedrock
01/29/2018
7.0
41.75
9
500
0.43
15
220
9.9
248
248
<0.1
0.96 S1
13
<50
61.2
13
177
17
320
224
<1
<1
37
<1
<1
0.07
9.27
<1
1.4
445
<1
BG-OIBR
Bedrock
04/09/2018
6.8
40.22
16
490
0.46
5
210
7.7
231
231
<0.1
0.792 S1
<5
<50
60.3
13
173
19
300
38
0.482j
0.421j
39
<1
<1
0.053
0.779j
0.521j
0.617j
113
<1
BG-01BR
Bedrock
07/31/2018
6.8
40.05
20
1 512
0.27
-392
-187
0.4
296
296
1 <0.1
0.825 S1
<5
<50
62.9
14
189
17
330
4.638j
0.346j
0.483j
31
<1
<1
0.12
<1
0.581j
0.459j
28
<1
BG-01BR
Bedrock
11/13/2018
7.0
38.69
14
493
0.69
-19
186
9.6
258
258
<0.1
0.775
<5
<50
60.5 M4
13
177
17
310
10
<1
0.461j
31
<1
<1
0.049
<1
0.485j
0.44j
40
<1
BG-OIBRLR
Bedrock
01/30/2018
8.0
39.34
15
1117
0.07
155
360
9.8
260
260
<0.1
1.9 S1
20
<50
59.6
130
669
140
580
117
1.14
8.4
64
<1
<1
<0.025
2.53
<1
<1
131
<1
BG-OIBRLR
Bedrock
04/09/2018
8.0
37.55
16
1030
0.06
-130
75
32.3
238
238
<0.1
1.8 SS
28
40.682j
L 110
823
110
550
144
1.56
7.47
91
<1
<1
2.42
0.3431
0.59
<1
BG-OIBRLR
Bedrock
07/30/2018
8.4
37.66
18
1009
0.62
-96
109
9.5
244
244
<0.1
1.8
19
22.754j
66.6 M4
83
589
85
500
301
<1
4.5
48
<1
<1
<0.025
<1
<1
<1
122 SI
0.449j
BG-OIBRLR
Bedrock
11/14/2018
8.5
36.75
15
890
0.20
-159
46
9.9
219
213
<0.1
1.7 S1
12
22.846j
54.3
79
567
79
460
128
<1
6.02
58
<1
<1
<0.025
0.469 j,B2
<1
<1
59
<1
BG-02BR
Bedrock
01/29/2018
7.9
51.14
14
566
0.70
-131
74
6.5
232
232
<0.1
2 S1
11
<50
72.5
33
306
27
350
60
<1
2.57
14
<1
<1
<0.025
3.36
<1
<1
260
<1
BG-02BR
Bedrock
04/09/2018
8.2
49.32
16
574
0.62
42
247
7.2
218
183
0.17
2.5 S1
97
<50
29.6
29
273
34
270
250
<1
1.96
26
<1
<1
<0.025
1.98
<1
1.82
299
<1
BG-02BR
Bedrock
07/31/2018
8.3
48.91
18
546
1.31
-107
98
6.6
231
231
<0.1
2 S1
11
<50
60.4
35
293
26
330
40
<1
2.16
14
<1
<1
<0.025
<1
<1
<1
182
<1
BG-02BR
Bedrock
11/13/2018
8.0
47.63
14
438
0.89
-114
91
2.8
194
14.5
0.28
2.5
8
<50
2.85
28
153
36
310
12
<1
2.03
11
<1
<1
0.045
<1
<1
<1
12
<1
CCR-104BR IMP
Bedrock
01/23/2018
6.6
25.66
18
2195
0.62
83
288
5.7
341
341
<0.1
1.7 SI
29
6160
260
41
926
970
1800
684 B3
<1
<1
42
<1
<1
0.19 M1
1
<1
2.29
457
<1
CCR-107BR (Geochem Model)
Bedrock
09/20/2018
6.3
16.51
19
853
2.88
126
331
0.9
125
125
<0.1
1.7 S1
<5
4140
92.1 B2
19
894
340
690
3.3j
<1
<1
73
<1
<1
1 0.057
<1
<1
1.15
3.656j
<1
CCR-108BR (Geochem Model)
Bedrock
09/20/2018
6.6
31.10
19
2227
1.28
128
333
0.2
302
302
<0.1
1.7 S1
<5
11600
254 B2
25
1490
1200
2100
3.7 j
<1
<1
33
<1
<1
0.086
<1
0.563 j
0.669 j
<10
<1
CCR-113BR IMP
Bedrock
07/31/2018
7.0
24.85
19
786
0.22
196
401
8.5
290
290
<0.1
3.7
<5
<50
66.3 M4
16
213
130
480
113
<1
0.719j
15
<1
<1
<0.025
<1
0.461j
0.404j
235
<1
CCR-113BR IMP
Bedrock
11/15/2018
7.1
22.88
14
775
0.26
37
242
9.5
261
261
<0.1
2.1
<5
<50
79.7
12
207
140
450
40
<1
1.36
18
<1
<1
<0.025
0.334j
<1
<1
432
<1
CCR-113D IMP
Transition Zone
07/31/2018
6.7
23.41
20
653
1.03
179
384
9.8
273
273
<0.1
1.4
<5
<50
60.1
9.7
255
110
440
209
<1
<1
32
<1
<1
0.04
0.387j
0.715j
0.845j
244
<1
CCR-113D IMP
Transition Zone
11/15/2018
6.7
21.25
12
636
1.24
143
348
6.6
228
228
<0.1
1.4
<5
<50
59.8
9.6
287
120
410
91
<1
<1
33
<1
<1
0.095
0.364j
<1
1.15
109
<1
CCR-202BR(Geochem Model)
Bedrock
09/20/2018
6.4
30.11
19
3035
0.27
125
330
0.8
251
251
<0.1
1.6 S1
<5
2880
387 B2
34
1190
1800
2800
<5
<1
<1
29
<1
<1
<0.025
<1
<1
1.77
<10
<1
CCR-202D (Geochem Model)
Transition Zone
09/20/2018
6.3
23.45
19
3259
0.31
129
334
0.5
236
236
<0.1
1.8 51
<5
2770
415 B2
29
1400
2100
3100
<5
<1
<1
23
<1
<1
<0.025 M1
<1
<1
2.31
7.041 j
<1
CCR-203BR (Geochem Model)
Bedrock
09/20/2018
6.6
4.00
23
1291
0.76
58
263
0.7
386
386
<0.1
2.1 S1
<5
762
169 B2
30
682
350
920
3.3j
<1
<1
71
<1
<1
<0.025
<1
8.61
0.769j
178
<1
CCR-203D (Geochem Model)
Transition Zone
09/20/2018
6.3
5.32
23
1190
0.23
15
220
2.8
321
321
<0.1
2 Sl
<5
491
125 B2
32
858
300
Boo
16
<1
<1
183
<1
<1
<0.025
<1
5.6
0.405j
1440
<1
CCR-208BR (Geochem Model)
Bedrock
09/20/2018
6.4
22.40
20
9437
2.00
137
342
0.2
140
140
<0.1
1.5 S1
<5
50800
1330 B2
3000
9370
1000
7500
3.2j
<1
0.398j
125
<1
0.746j
0.2
0.41j
38.2
17.8
5.589j
<1
CW-01
Bedrock
02/01/2018
6.3
27.20
12
604
0.34
274
479
2.6
220
220
<0.1
1.7 S1
<5
<50
39.3
15
419
100
430
51
<1
<1
Ill
<1
<1
<0.025
<1
<1
1.27
60
<1
CW-01 IMP
Bedrock
04/11/2018
6.2
24.05
17
630
0.20
323
528
6.4
220
220
<0.1
2.2 S1
<5
<50
41.9
12
433
110
430
138
<1
<1
109
<1
<1
<0.025
<1
0.431j
3.36
Ill
<1
CW-01 IMP
Bedrock
07/25/2018
6.0
24.60
25
668
0.69
360
565
0.8
225
225
<0.1 R1
1.8 S1
<5
<50
42.7
14
447
99
430
40
<1
<1
121
<1
<1
<0.025
<1
<1
1.36
51
<1
CW-01 IMP
Bedrock
11/13/2018
6.1
22.25
16
879
0.49
468
673
2.9
241
241
<0.1
1.8
7
<50
44.4
9.7
467
97
430
142
<1
<1
108
<1
<1
<0.025
<1
0.985j
2.25
238
<1
CW-02
Transition Zone
01/30/2018
6.8
14.36
11
664
3.25
44
249
3.7
287
287
<0.1
1 51
<5
<50
42.2
16
374
110
440
44
<1
<1
93
<1
<1
0.66 M1
<1
<1
<1
35
<1
CW-02 IMP
Transition Zone
04/11/2018
6.8
13.20
13
720
1.16
266
471
3.7
307
307
<0.1
1.2 S1
<5
<50
42.4
16
363
80
430
58
<1
<1
87
<1
<1
0.25
0.367j
0.852j
<1
450
<1
CW-02 IMP
Transition Zone
07/25/2018
6.5
13.70
22
756
1.24
191
396
3.3
285
285
<0.1
1.1 S1
<5
<50
42.9
16
374
85
420
17
<1
<1
87
<1
<1
0.34
0.512j
<1
<1
210
<1
CW-02 IMP
Transition Zone
11/13/2018
6.7
12.15
15
962
2.07
560
765
4.2
277
277
<0.1
1
<5
<50
43
16
365
85
420
15
<1
<1
85
<1
<1
0.54
0.561j
<1
<1
153
<1
CW-02D
Bedrock
01/30/2018
6.8
14.35
14
607
1.63
62
267
0.9
211
211
<0.1
1 SS
<5
<50
48.5
17
326
140
430
6
<1
<1
153
<1
<1
0.42
<1
<1
<1
<10
<1
CW-02D IMP
Bedrock
04/11/2018
6.8
13.21
15
661
4.09
293
498
1.2
210
210
<0.1
0.887 S1
<5
<50
48.6
17
325
130
410
17
<1
<1
158
<1
<1
0.41
0.534j
<1
0.392j
14
<1
CW-02D IMP
Bedrock
07/25/2018
6.5
13.70
23
663
3.50
285
490
1.7
201
201
<0.1
1 SS
<5
17.873j
48.2
16
326
130
420
2.959j
<1
<1
150
<1
<1
0.44
0.466j
<1
<1
<10
<1
CW-02D IMP
Bedrock
11/13/2018
6.6
12.10
15
852
2.55
507
712
1.7
192
192
<0.1
0.99
<5
19.807j
47.5
15
321
130
400
<5
<1
<1
145
<1
<1
0.38
0.453j
<1
<1
<10
<1
CW-03
Transition Zone
01/30/2018
6.6
4.95
11
533
1.56
104
309
37.1
179
79
<0.1
5
<5
<50
46.1
48
307
52
360
2700
<1
<1
99
<1
<1
0.037
<1
<1
2.19
2410
<1
CW-03 IMP
Transition Zone
04/10/2018
6.0
4.91
14
118
2.89
113
318
50.5
56.7
56.7
<0.1
4.2
<5
<50
15.8
15
124
25
210
4160
<1
0.513j
50
<1
<1
0.034
1.8
0.71j
2.94
3640
1
CW-03 IMP
Transition Zone
07/25/2018
6.4
5.20
20
817
3.64
321
526
0.8
284
284
<0.1
2.7 51
<5
<50
70.2
60
449
69
470
9
<1
<1
135
<1
<1
0.074
<1
<1
0.347 j
13
<1
CW-03 IMP
Transition Zone
11/13/2018
6.1
3.22
17
311
0.29
306
511
40.4
87.9
87.9
<0.1
4.3
<5
<50
21.8
18
162
27
210
4070
<1
0.435 j
61
<1
<1
0.044
1.12
1.2
2.53
3320
0.674 j
CW-03D
Bedrock
01/30/2018
7.7
2.41
6
517
0.82
-56
149
5.9
266
266
<0.1 Rl
0.886 SI
7
<50
74.8
25
281
32
350
91
<1
<1
62
<1
<1
<0.025
<1
<1
<1
156
<1
CW-03D IMP
Bedrock
04/10/2018
7.4
1.78
18
554
0.74
4
209
2.7
225
225
<0.1
0.795 SI
6
<50
69.7
26
280
34
350
93
<1
0.657j
53
<1
<1
0.11
<1
<1
0.797j
103
<1
CW-03D IMP
Bedrock
07/25/2018
7.4
2.76
21
519
2.05
299
504
3.2
222 MI
222
<0.1
0.82 Sl
<5
<50
66.2
25
265
32
320
26
<1
0.642 j
50
<1
<1
0.079
<1
<1
0.558 j
24
<1
CW-03D IMP
Bedrock
11/13/2018
7.5
0.89
14
546
3.86
339
544
20.3
197
197
<0.1
0.826
7
<50
69
24
273
33
330
1100
<1
0.654j
64
<1
<1
0.11
1.24
0.456j
1.72
916
0.334j
CW-04
Transition Zone
01/30/2018
6.8
28.94
13
549
1.52
143
348
1.4
249
249
<0.1
0.835 SI
<5
<50
42.6
28
187
40
360
32
<1
<1
132
<1
<1
0.28
<1
<1
<1
35
<1
CW-04 IMP
Transition Zone
04/10/2018
6.7
28.52
16
587
1.87
79
284
1.4
250
250
<0.1
0.81 Si
<5
<50
45.4
30
194
40
350
29
<1
<1
135
<1
<1
0.24
0.402j
<1
0.623j
30
<1
CW-04 IMP
Transition Zone
07/25/2018
6.5
28.40
25
597
1.64
333
538
0.9
234
234
<0.1
0.898 51
<5
<50
40.5
28
184
38
320
6
<1
<1
124
<1
<1
0.23
0.347j
<1
0.45j
5.373j
<1
CW-04 IMP
Transition Zone
11/14/2018
6.5
27.90
13
616
1.75
570
775
4.1
220
220
<0.1
0.815 SI
<5
<50
40.9
28
191
39
330
4.085j
<1
<1
131
<1
<1
0.24
0.335 j,B2
<1
<1
7.521j
<1
CW-05
Transition Zone
01/31/2018
6.8
11.09
13
546
4.60
65
270
1.8
129
129
<0.1
1.5 S1
<5
306
57.4
3.8
323
220
500
23
<1
<1
43
<1
<1
0.28
<1
<1
1.63 S1
21
<1
CW-05 IMP
Transition Zone
04/11/2018
6.6
9.79
13
485
6.74
301
506
0.9
156
156
<0.1 M1
1.4 S1
<5
236
48.8
3.3
291
ISO
410
11
<1
<1
50
<1
<1
0.26
0.553j
<1
0.483j
7.922j
<1
CW-05 IMP
Transition Zone
07/25/2018
6.3
10.27
24
618
3.92
282
487
1.1
139
139
<0.1
1.3 S1
<5
286
57.4
5.7
307
200
470
13
<1
<1
42
<1
<1
0.33
0.449j
<1
0.42j
9.964001j
<1
CW-05 IMP
Transition Zone
11/13/2018
6.4
7.95
1 15
1 556
1 6.45
1 531
1 736
1 2.2
1 140
1 140
1 <0.1
1.3
<5
220
44.5 M4
3.9
266
160
400
9
<1
<1
54
<1
<1
0.36
0.362j
<1
0.345j
5.419j
<1
Page 4 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Lithium
20
Magnesium
14.3
Manganese
56
Mercury
<0.05
Molybdenum
10.9
Nickel
<1
Nitrate+
Nitrite
<0.01
Potassium
2.31
Selenium
<1
Sodium
52.7
Thallium
<0.2
Vanadium
<0.3
Zinc
<5
Aluminum
(0.45u)
5
Antimony
(0.45u)
<1
Arsenic
(O.45u)
1.5
Barium
(O.45u)
15
Beryllium
(O.45u)
<1
Boron
(0.45u)
119
Cadmium
(0.45u)
<1
Chromium
(0.45u)
<1
Cobalt
(O.45u)
<1
Copper
(0.45u)
<1
Iron
(O.45u)
115
Lead
(0.45u)
<1
Lithium
(O.45u)
9
Manganese
(O.45u)
54
ABMW-07BRL
Bedrock
01/31/2018
ABMW-07BRL
Bedrock
04/11/2018
3.55j
19.2
67
<0.05
3.88
<1
<0.01
1.14
<1
44
0.082j
0.228j
<5
2.827j
<1
0.385j
12
<1
193
<1
0.356j
<1
<1
231
<1
2.853j
63
ABMW-07BRL
Bedrock
07/25/2018
7
18.1
66
<0.05
3.9
<1
<0.01
1.39
<1
45.8
<0.2
0.235 j,S1
<5
2.868 j
<1
0.612 j
14
<1
180
<1
<1
<1
<1
267
<1
9
71
ABMW-07BRL
Bedrock
11/14/2018
10
17
67
<0.05
4.4
<1
<0.01
1.65
<1
45
<0.2
0. 19j
<5
2.176j
<1
0.502j
14
<1
151
<1
<1
<1
<1
214
<1
10
66
BG-01
Transition Zone
01/29/2018
5
26
<5
<0.05
<1
1.6
2.2
1.8
<1
33.9
<0.2
19.2
<5
<5
<1
<1
88
<1
<50
<1
4.02
<1
<1
<10
<1
<5
<5
BG-01 IMP
Transition Zone
04/09/2018
4.561 j
27.5
5
<0.05
0.686 j
1.44
2.5
1.94
<1
33.3
<0.2
17.3
<5
1.898 j
<1
<1
89
<1
<50
<1
2.5
<1
0.863 j
<10
<1
2.635 j
<5
BG-01 IMP
Transition Zone
07/25/2018
3.507 j
26.3
1.761 j
<0.05
0.65 j
1.22
2.5
1.83
<1
33.4
<0.2
16.7
1.757 j
<5
<1
<1
90
<1
<50
<1
2.36
<1
0.886 j
<10
<1
4.192 j
<5
BG-01 IMP
Transition Zone
11/14/2018
4.022j
25.6
<5
<0.05
0.609j
0.689j
2.8
1.84
<1
33.1
0.177j
18.1
<5
1.711j
<1
<1
89
<1
<50
<1
1.93
<1
0.908j
3.829j
<1
4.133j
<5
BG-OIBR
Bedrock
01/29/2018
17
16.1
287
<0.05
2.7
7.62
0.391
5.8
<1
23.6
<0.2
2.51
6
<5
<1
<1
31
<1
<50
<1
<1
<1
<1
20
<1
11
209
BG-OIBR
Bedrock
04/09/2018
16
15
280
<0.05
2.54
1.55
0.288
6.1
<1
23
<0.2
2.05
2.976 j,S1
3.675j
<1
0.459j
33
<1
<50
<1
<1
0.44j
<1
13
<1
13
229
BG-OIBR
Bedrock
07/31/2018
14
16.6
263
<0.05
2.48
0.892j
0.3
5.48
<1
24.7
<0.2
2.26 B2
3.138j
4.577j
<1
0.488j
24
<1
<50
<1
0.492j
0.698j
<1
41
<1
12
227
BG-OIBR
Bedrock
11/13/2018
14
15.7
179
0.02j
2.41
0.86j
0.231
5.49
<1
23.1
<0.2
2.26
9
1.91j
<1
0.451j
30
<1
<50
<1
<1
0.501j
0.497j
56
<1
14
189
BG-OIBRLR
Bedrock
01/30/2018
66
11.8
215
<0.05
30.6
<1
0.011
63.8
<1
98.8 82„83
<0.2
<0.3
<5
<5
<1
8.09
45
<1
<50
<1
<1
<1
<1
49
<1
65
186
BG-OIBRLR
Bedrock
04/09/2018
74
11.6
217
<0.05
25.4
0.806j
0.011
0.337j
92
0.085j
1
2.509 j,S1
2.928j
0.568j
7.13
1
37.801j
11
<1
<1
39
<1
68
178
BG-OIBRLR
Bedrock
07/30/2018
48
12
240
<0.05
19.5
0. 504j
0.011
40.8
<1
66.8 B2,M4
<0.2
0.792
3.759j
<5
<1
4.36
40
<1
23.007j
<1
<1
<1
<1
23
<1
43
222
BG-OIBRLR
Bedrock
11/14/2018
88
9.92
167
0.028j
19.2
<1
0.071
53.9
<1
72.4
<0.2
0.676
<5
1.884j
<1
5.72
49
<1
22.746j
<1
<1
<1
<1
14
<1
80
166
BG-02BR
Bedrock
01/29/2018
28
13.1
172
<0.05
7.63
2.62
<0.01
7.6
<1
31.2
<0.2
0.322
8
<5
<1
2.73
11
<1
<50
<1
<1
<1
<1
196
<1
14
153
BG-02BR
Bedrock
04/09/2018
167
9.51
64
0.019 j
15.5
1.77
<0.01
41.8 M4
<1
64.1
<0.2
0.687
8 S1
1.756 j
<1
1.47
8
<1
<50
<1
<1
<1
<1
7.549 j
<1
134
3.275 j
BG-02BR
Bedrock
07/31/2018
50
11.7
129
<0.05
7.94
<1
<0.01
12.8
<1
36.5
<0.2
0.241 j,B2
<5
5
<1
2.25
12
<1
<50
<1
<1
<1
<1
128
<1
36
134
BG-02BR
Bedrock
11/13/2018
238
2.06
<5
0.019j
21.1
0.399j
<0.01
59.2
<1
83.5
<0.2
0.258j
2.354j
3.033j
<1
1.78
11
<1
<50
<1
<1
<1
<1
9.95j
<1
202
4.62j
CCR-104BR IMP
Bedrock
01/23/2018
17
138
60
<0.05
1.82
1.62
0.154
7.82
30.3
93
<0.2
3.05
24
8
<1
<1
27
<1
6270
<1
<1
<1
<1
<10
<1
6
34
CCR-107BR (Geochem Model)
Bedrock
09/20/2018
5
43.7
3.717j
<0.05
0.451j
1.17
0.365
3.7
<1
42.9
<0.2
12.5
1.728j
1.878j
<1
<1
69
<1
4230
<1
<1
<1
1.01
5.396j
<1
5
8
CCR-108BR (Geochem Model)
Bedrock
09/20/2018
13
181
74
0.019j
231
5.72
1.5
7.43
19.2
100
<0.2
6.26
3.1j
<5
<1
<1
31
<1
11800
<1
<1
0.7j
0.679j
<10
<1
15
92
CCR-113BR IMP
Bedrock
07/31/2018
2.943j
41 M4
69
<0.05
3.02
0.553j
0.05
3.32
<1
35.2 B2,M4
<0.2
1.5
8
2.553j
<1
0.661j
15
<1
<50
<1
<1
0.402j
<1
129
<1
<5
65
CCR-113BR IMP
Bedrock
11/15/2018
<5
41.4 B2
44
<0.05
1.28
0.49 j
0.026
2.74
<1
32.4
<0.2
1.32
3.805 j
2.832 j
<1
1.05
17
<1
<50
<1
<1
<1
<1
340
<1
<5
37
CCR-113D IMP
Transition Zone
07/31/2018
2.876 j
39
97
<0.05
0.842 j
2
0.731
2.43
0.38 j
32 B2
<0.2
2.54
4.074 j
3.091 j
<1
<1
29
<1
<50
<1
<1
0.529 j
<1
<10
<1
<5
81
CCR-113D IMP
Transition Zone
11/15/2018
<5
33.6
20
<0.05
0.788 j
1.81
1.3
1.72
0.352 j
37.3
<0.2
3.35
8
2.633 j
<1
<1
28
<1
<50
<1
<1
<1
0.393 j
<10
<1
<5
12
CCR-202BR (Geochem Model)
Bedrock
09/20/2018
10
214
93
0.035j
1.01
12
0.152
11.8
0.419j
139
<0.2
4.12
<5
<5
<1
<1
28
<1
2780
<1
<1
<1
1.61
5.449j
<1
6
88
CCR-202D (Geochem Model)
Transition Zone
09/20/2018
15
235
634
0.023j
0.423j
20.4
0.266
11
0.52j
169
<0.2
4.8
3.271j
<5
<1
<1
22
<1
2660
<1
<1
<1
2.13
<10
<1
9
624
CCR-203BR (Geochem Model)
Bedrock
09/20/2018
4.205j
67.6
355
<0.05
5.04
1.46
0.01
7.6
<1
49.4
<0.2
3.44
3.342j
1.972j
<1
<1
68
<1
729
<1
<1
8.03
<1
155
<1
2.431j
325
CCR-203D (Geochem Model)
Transition Zone
09/20/2018
1.86j
66.2
460
<0.05
0.658j
2.36
<0.01
2.88
<1
44.8
<0.2
1.81
<5
1.984j
<1
<1
192
<1
437
<1
<1
4.99
<1
1050
<1
<5
404
CCR-208BR (Geochem Model)
Bedrock
09/20/2018
60
462
7770
<0.05
220
83.4
0.016
9.91
<1
72
<0.2
11.4
2.024j
<5
<1
0.413j
123
<1
50400
0.793j
<1
36.6
16
3.639j
<1
66
7820
CW-OS
Bedrock
02/01/2018
<5
18.7
112
0.07
<1
<1
0.109
2.67
<1
67.1 B3
<0.2
23.2
<5
<5
<1
<1
114
<1
<50
<1
<1
<1
<1
37
<1
<5
76
CW-OS IMP
Bedrock
04/11/2018
2.942 j
18.8
55
<0.05
0.266 j
1.21
0.521
2.7
0.747 j
72.7
<0.2
28.1
<5
6
<1
<1
105
<1
<50
<1
<1
0.425 j
1.59
87
<1
4.103 j
36
CW-01 IMP
Bedrock
07/25/2018
4.293j
19.1
33
0.019j
0.15j
0.954j
0.161
2.94
0.51j
69.6
0.179j
22.2
1.919j
3.051j
<1
<1
121
<1
<50
<1
<1
<1
2.14
46
<1
11
21
CW-01 IMP
Bedrock
11/13/2018
3.245j
19.5
77
0.044j
0.24j
1.02
0.118
2.82
0.544j
77
<0.2
24.7
<5
3.967j
<1
<1
116
<1
<50
<1
<1
0.606j
0.596j
102
<1
2.687j
49
CW-02
Transition Zone
01/30/2018
<5
32.5
<5
<0.05
<1
<1
0.27
1.22
<1
69.4 B2„B3
<0.2
33.6
<5
6
<1
<1
92
<1
<50
<1
<1
<1
<1
<10
71
<5
<5
CW-02 IMP
Transition Zone
04/11/2018
<5
32.4
405
<0.05
0.385j
0.484j
0.18
1.37
<1
72.8
<0.2
18.2
<5
2.339j
<1
<1
84
<1
<50
<1
0.478j
0.651j
<1
426
<1
2.415j
507
CW-02 IMP
Transition Zone
07/25/2018
<5
32.6
212
<0.05
0.362j
0.385j
0.24
1.26
<1
72.6
0.117j
21.5
1.835j
2.182j
<1
<1
91
<1
<50
<1
0.539j
<1
<1
175
<1
2.631j
198
CW-02 IMP
Transition Zone
11/13/2018
<5
32.4
99
0.018j
0.269j
<1
0.256
1.31
<1
71.9
<0.2
30.8
<5
4.221j
<1
<1
85
<1
<50
<1
0.628j
<1
<1
164
<1
<5
120
CW-02D
Bedrock
01/30/2018
<5
38.6
<5
<0.05
<1
<1
0.295
2.71
<1
37.6 B2„B3
<0.2
13.3
<5
<5
<1
<1
151
<1
<50
<1
<1
<1
<1
<10
<1
<5
<5
CW-02D IMP
Bedrock
04/11/2018
<5
39
<5
<0.05
0.834j
<1
0.338
2.69
<1
37.6
0.098j
13.1
<5
1.778j
<1
<1
153
<1
<50
<1
0.504j
<1
<1
<10
<1
1.748j
<5
CW-02D IMP
Bedrock
07/25/2018
<5
38.6
<5
<0.05
0.697j
<1
0.346
2.53
<1
36.6
<0.2
12.4
<5
<5
<1
<1
146
<1
18.078j
<1
0.431j
<1
0.47j
<10
<1
2.597j
<5
CW-02D IMP
Bedrock
11/13/2018
<5
37.7
<5
0.025 j
0.753 j
<1
0.346
2.55
<1
36.2
<0.2
13.2
<5
<5
<1
<1
139
<1
20.987 j
<1
0.517 j
<1
1.12
<10
<1
<5
<5
CW-03
Transition Zone
O1/30/2018
<5
25
10
<0.05
<1
1.02
0.263
2.64
<1
36.7 132„133
<0.2
8.59
<5
9
<1
<1
91
<1
<50
<1
<1
<1
<1
41
<1
<5
<5
CW-03 IMP
Transition Zone
04/10/2018
3.13 j,132
8.85
14
0.017j
0.159j
0.905j
0.034
1.14
<1
13.4
<0.2
14.5
3.287j
22
<1
<1
<1
<50
<1
<1
<1
0.722j
68
<1
<5
1.89j
CW-03 IMP
Transition Zone
07/25/2018
1.804 j
37.2
<5
<0.05
0.529 j
0.348 j
0.636
3.69
0.433 j
53.7
<0.2
3.7 S1
<5
2.328 j
<1
<1
--Am
140
<1
<50
<1
<1
<1
<1
<10
<1
3.243 j
<5
CW-03 IMP
Transition Zone
11/13/2018
<5
11
116
0.028 j
0.153 j
1.06
0.081
1.57
<1
18.3
<0.2
9.72
4.789 j
9
<1
<1
<1
<50
<1
<1
0.8 j
1.05
26
<1
<5
112
CW-03D
Bedrock
01/30/2018
<5
18.7
124
<0.05
2.72
<1
<0.01
4.9
<1
18.7 132„133
<0.2
2.93
<5
<5
<1
<1
51
<1
<50
<1
<1
<1
<1
13
<1
<5
38
CW-03D IMP
Bedrock
04/10/2018
5 B2
19.4
32
<0.05
3.21
<1
0.099
5.26
<1
19.4
<0.2
2.3
<5
3.305j
<1
0.535j
43
<1
<50
<1
<1
<1
0.343j
5.055j
<1
2.191j
9
CW-03D IMP
Bedrock
07/25/2018
2.239 j
17.8
4.933 j
<0.05
2.92
0.366 j
0.072
4.71
<1
18.6
<0.2
2.73 S1
2.623 j
4.121 j
<1
0.607 j
52
<1
<50
<1
<1
<1
0.384 j
<10
<1
3.346 j
<5
CW-03D IMP
Bedrock
11/13/2018
1.84j6,
17.9
113
0.017j
2.88
0.889j
<0.01
4.67
<1
18.9
<0.2
08
3.541j
2.716j
<1
0.498j
74
<1
<50
<1
<S
<1
0.362j
3.526j
<1
<5
75
CW-04
Transition Zone
01/30/2018
<5
26.8
<5
<0.05
6.29
<1
0.316
4.49
<1
45.9 B3
<0.2
2.35
<5
<5
<1
<1
127
<1
<50
<1
<1
<1
<1
<10
<1
<5
<5
CW-04 IMP
Transition Zone
04/10/2018
4.239 j,B2
28.2
<5
<0.05
6.09
<1
0.298
4.49
0.5j
44.5
<0.2
2.37
<5
<5
<1
<1
122
<1
<50
<1
0.357j
<1
<1
<10
<1
<5
<5
CW-04 IMP
Transition Zone
07/25/2018
<5
24.9
<5
<0.05
5.53
<1
0.294
3.98
0.467j
41.3
<0.2
2.18 S1
2.161j
2.172j
<1
<1
130
<1
<50
<1
<1
<1
0.435j
<10
<1
2.431j
<5
CW-04 IMP
Transition Zone
11/14/2018
2.706j
25.9
<5
<0.05
5.88
<1
0.247
4.29
0.411j
43.9
<0.2
2.08
<5
<5
<1
<1
125
<1
<50
<1
0.394j
<1
0.896j
<10
<1
2.743j
<5
CW-05
Transition Zone
01/31/2018
<5
36.1
<5
<0.05
<1
<1
0.67
0.989
<1
28.4 B2„B3
<0.2
25.8
<5
<5
<1
<1
43
<1
316
<1
<1
<1
<1
<10
<1
<5
<5
CW-05 IMP
Transition Zone
04/11/2018
<5
32
<5
<0.05
0.147j
0.907j
0.576
0.835
<1
26
<0.2
26.8
<5
2.009j
<1
<1
48
<1
233
<1
0.473j
<1
<1
<10
<1
<5
<5
CW-05 IMP
Transition Zone
07/25/2018
<5
36.4
<5
<0.05
0.16j
0.803j
0.566
0.922
<1
28.8
<0.2
25.1
1.916j
1.946j
<1
<1
43
<1
294
<1
0.4j
<1
<1
<10
<1
2.038j
<5
CW-05 IMP
Transition Zone
11/13/2018
<5
28.3 M4
<5
0.018j
0.231j
<1
0.402
0.899
<1
27.9 M4
<0.2
33.5
<5
2.454j
<1
<1
54
<1
242
<1
0.464j
<1
1.07
<10
<1
<5
<5
Page 5 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
OTHER PARAMETERS
Mercury
(0.45u)
<0.05
Molybdenum
(0.45u)
11.4
Nickel
(0.45u)
<1
Phosphorus
(0.45u)
<0.05
Selenium
(0.45u)
<1
Silver
(0.45u)
NA
Strontium
(0.45u)
611
Thallium
(0.45u)
<0.2
Vanadium
(0.45u)
<0.3
Zinc
(0.45u)
<5
Radium-226
NA
Radium-228
NA
Total
Radium
NA
Uranium-238
NA
Total
Uranium
NA
Carbonate
Alkalinity
<5
Fluoride
<0.5
Hardness
NA
Phosphorus
<0.05
ABMW-07BRL
Bedrock
01/31/2018
ABMW-07BRL
Bedrock
04/11/2018
<0.05
3.4
<1
<0.05
<1
NA
839
0. 104j
<0.3
<5
NA
NA
NA
NA
NA
<5
0.065j
NA
<0.05
ABMW-07BRL
Bedrock
07/25/2018
<0.067
4.01
<1
<0.05
<1
NA
830
<0.2
<0.3
2.69j
NA
NA
NA
NA
NA
<5
0.3025j
NA
<0.05
ABMW-07BRL
Bedrock
11/14/2018
<0.05
4.2
<1
<0.05
<1
NA
748
<0.2
0.314
<5
NA
NA
NA
NA
NA
<5
0.2605j
NA
<0.05
BG-01
Transition Zone
01/29/2018
<0.05
<1
1.38
0.16
<1
NA
448
<0.2
18.1
<5
0.744
0.248 U
0.992
NA
0.000482
<5
0.2
NA
0.17
BG-01 IMP
Transition Zone
04/09/2018
<0.05
0.706j
1.23
0.14
<1
NA
455
<0.2
16.8
<5
1.27
0.182 U
1.452
NA
0.000615
<5
0.13
NA
0.15
BG-01 IMP
Transition Zone
07/25/2018
<0.05
0.678j
1.33
0.14
<1
NA
463
<0.2
18.2
<5
-0.0234 U
-0.117 U
-0.1404
NA
0.000585
<5
0.15
NA
0.15
BG-01 IMP
Transition Zone
11/14/2018
<0.05
0.701j
<1
0.15
<1
NA
455
<0.2
17.7
4.91j
0.149 U
0.131 U
0.28
0.0006
0.0006
<5
0.13
NA
0.15
BG-OIBR
Bedrock
01/29/2018
<0.05
2.68
1.96
0.052
<1
NA
181
<0.2
2.1
<5
2.3
0.359 U
2.659
NA
0.000841
<5
0.16
NA
0.061
BG-OIBR
Bedrock
04/09/2018
<0.05
2.74
1.23
<0.05
0.351j
NA
183
<0.2
1.92
7
0.622
0.425 U,D6
1.047
NA
0.000886
<5
0.1
NA
0.053
BG-01BR
Bedrock
07/31/2018
<0.05
2.54
0.919j
<0.05
0.426j
NA
190
<0.2
2.3
3.318j
0.094 U
0.029 U
0.123
NA
0.000902
<5
0.11
NA
<0.05
BG-01BR
Bedrock
11/13/2018
0.019j
2.36
0.778j
0.057
0.376j
NA
189
<0.2
2.19
5
0.347
0.428
0.775
0.000805
0.000805
<5
0.051j
NA
0.054
BG-OIBRLR
Bedrock
01/30/2018
<0.05
29.4
<1
<0.05
<1
NA
538
<0.2
0.506
<5
1.24
1.11
2.35
NA
0.0286
<5
<0.2
NA
0.052
BG-OIBRLR
Bedrock
04/09/2018
<0.05
<0.05
46j
545INES-
5.92
NA
0.0302
<5
NA
BG-OIBRLR
Bedrock
07/30/2018
0.018j
19.8
0.341j
<0.05
<1
NA
547
<0.2
0.683
1.884j
1.46
2.35
3.81
NA
0.0184
<5
0.21
NA
<0.05
BG-OIBRLR
Bedrock
11/14/2018
<0.05
19.1
<1
<0.05
<1
NA
515
<0.2
0.604
<5
0.673
1.51 B
2.183
0.0176
0.0176
5.66
0.1872j
NA
<0.05
BG-02BR
Bedrock
01/29/2018
<0.05
7.16
1.98
<0.05
<1
NA
274
<0.2
<0.3
<5
0.291 U,D6
0.606
0.897
NA
0.00567
<5
0.21
NA
<0.05
BG-02BR
Bedrock
04/09/2018
0.026j
12.9
0.486j
<0.05
<1
NA
138
<0.2
0. 159j
1.902j
1.85
0.489 U
2.339
NA
0.00366
35
0.18
NA
<0.05
BG-02BR
Bedrock
07/31/2018
<0.05
8.01
<1
<0.05
<1
NA
271
<0.2
0.17 j
<5
1.59
1.17
2.76
NA
0.0042
<5
0.17
NA
<0.05
BG-02BR
Bedrock
11/13/2018
0.027j
19.1
<1
<0.05
<1
NA
164
<0.2
0.32
<5
0.612
0.648
1.26
0.000587
0.000587
179
0.18
NA
<0.05
CCR-104BR IMP
Bedrock
01/23/2018
<0.05
1.44
1.05
<0.05
30.3
NA
937
<0.2
2.52
<5
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
CCR-107BR (Geochem Model)
Bedrock
09/20/2018
<0.05
0.418j
1.24
0.11
<1
NA
880
<0.2
13
1.954j
0.234
0.0723 U
0.3063
0.000121j
0.000121j
<5
0.239j
NA
0.089
CCR-108BR (Geochem Model)
Bedrock
09/20/2018
<0.05
259
7.13
0.098
17.5
NA
1510
<0.2
6.29
2.295j
0.349 U
0.111 U
0.46
0.0055
0.0055
<5
<2
NA
0.1
CCR-113BR IMP
Bedrock
07/31/2018
<0.05
2.93
0.436j
<0.05
<1
NA
221
<0.2
1.44
4.284j
NA
NA
NA
NA
NA
<5
0.683j
NA
<0.05
CCR-113BR IMP
Bedrock
11/15/2018
<0.05
1.2
<1
<0.05
<1
NA
197
0.127 j
1.6
2.382 j
NA
NA
NA
NA
NA
<5
0.166 j
NA
<0.05
CCR-113D IMP
Transition Zone
07/31/2018
<0.05
0.996 j
1.67
<0.05
<1
NA
247
<0.2
1.91
<5
NA
NA
NA
NA
NA
<5
0.7 j
NA
<0.05
CCR-113D IMP
Transition Zone
11/15/2018
<0.05
0.812 j
0.357 j
<0.05
<1
NA
271
<0.2
3.38
<5
NA
NA
NA
NA
NA
<5
0.29
NA
<0.05
CCR-202BR (Geochem Model)
Bedrock
09/20/2018
<0.05
0.897j
12.2
0.07
<1
NA
1150
<0.2
3.93
2.231j
0.308
0.292 U
0.6
0.00855
0.00855
<5
<5
NA
0.074
CCR-202D (Geochem Model)
Transition Zone
09/20/2018
<0.05
0.42j
19.8
0.089
<1
NA
1340
0.104j
4.68
2.793j
0.175 U
0.415 U
0.59
0.00924
0.00924
<5
<5
NA
0.064
CCR-203BR (Geochem Model)
Bedrock
09/20/2018
<0.05
5.01
1.55
0.063
<1
NA
649
<0.2
3.53
4.432j
0.0558 U
-0.0677 U
-0.0119
0.0067
0.0067
<5
<1
NA
<0.05
CCR-203D (Geochem Model)
Transition Zone
09/20/2018
<0.05
0.61j
2.56
0.063
<1
NA
832
<0.2
1.68
1.778j
0. 188 U
0.0884 U
0.2764
0.00142
0.00142
<5
0.234j
NA
0.07
CCR-208BR (Geochem Model)
Bedrock
09/20/2018
<0.05
203
78.1
0.066
<1
NA
9120
0.084j
11
3.408j
0.187 U
0.472 U
0.659
0.00859
0.00859
<5
0.922j
NA
<0.05
CW-OS
Bedrock
02/01/2018
<0.05
<1
<1
0.24
<1
NA
389
<0.2
14.3
<5
NA
NA
NA
NA
NA
<5
0.4
NA
0.29
CW-OS IMP
Bedrock
04/11/2018
0.019j
0.208j
0.902j
0.3
0.512j
NA
409
0.086j
19.8
3.717j
NA
NA
NA
NA
NA
<5
0.32
NA
0.29
CW-OS IMP
Bedrock
07/25/2018
<0.05
0.096j
1.03
0.29
0.433j
NA
443
<0.2
19.9
5
NA
NA
NA
NA
NA
<5
0.6
NA
0.3
CW-OS IMP
Bedrock
11/13/2018
<0.05
0.171j
1.19
0.31
0.42j
NA
472
<0.2
20.9
<5
0.202 U
0.431 U
0.633
0.000392
0.000392
<5
0.34
NA
0.3
CW-02
Transition Zone
01/30/2018
<0.05
<1
<1
0.15
<1
NA
364
<0.2
30.8
<5
2.78
-0.0366 U
2.7434
NA
0.00195
<5
0.74
NA
0.15
CW-02 IMP
Transition Zone
04/11/2018
<0.05
0.448j
0.644j
0.13
<1
NA
369
0. 132j
18.5
<5
0.481 U
-0.00157 U
0.47943
NA
0.00186
<5
0.63
NA
0.11
CW-02 IMP
Transition Zone
07/25/2018
<0.05
0.571j
0.438j
0.14
<1
NA
383
<0.2
28.2
1.757j
0.516
-0.127 U
0.389
NA
0.00188
<5
0.67
NA
0.13
CW-02 IMP
Transition Zone
11/13/2018
0.018j
0.266j
<1
0.16
<1
NA
366
<0.2
30
2.032j
1.17
0.0117 U
1.1817
0.00234
0.00234
<5
0.82
NA
0.16
CW-02D
Bedrock
01/30/2018
<0.05
<1
<1
0.054
<1
NA
321
<0.2
12.7
<5
1.04
0.0723 U
1.1123
NA
0.00138
<5
0.24
NA
0.059
CW-02D IMP
Bedrock
04/11/2018
<0.05
0.833j
<1
0.058
<1
NA
333
0.102j
13.3
<5
0.71 U
2.32
3.03
NA
0.0015
<5
0.29
NA
<0.05
CW-02D IMP
Bedrock
07/25/2018
<0.05
0.693j
<1
0.058
<1
NA
318
<0.2
12.4
<5
1.43
0.327 U
1.757
NA
0.00127
<5
0.28
NA
0.053
CW-02D IMP
Bedrock
11/13/2018
0.017j
0.768j
0.369j
0.068
<1
NA
313
<0.2
13
<5
0.383 U
0.173 U
0.556
0.00124
0.00124
<5
0.2
NA
0.066
CW-03
Transition Zone
01/30/2018
<0.05
<0.05
<1
NA
299
<0.2
<5
NA
NA
NA
NA
NA
<5
0.16
NA
0.072
CW-03 IMP
Transition Zone
04/10/2018
<0.05
0.12j
<1
<0.05
<1
Im115
<0.2
<5
NA
NA
NA
NA
NA
<5
0.13
NA
0.081
CW-03 IMP
Transition Zone
07/25/2018
<0.05
0.585 j
<1
0.063
0.389 j
NA
465
<0.2
3.7
13
NA
NA
NA
NA
NA
<5
0.21
NA
0.067
CW-03 IMP
Transition Zone
11/13/2018
0.02 j
0.217 j
0.748 j
<0.05
<1
NA
160
<0.2
1.68
<5
NA
NA
NA
NA
NA
<5
0.082 j
NA
0.079
CW-03D
Bedrock
01/30/2018
<0.05
2.46
<1
<0.05
<1
NA
281
<0.2
2.25
<5
NA
NA
NA
NA
NA
<5
0.17
NA
<0.05
CW-03D IMP
Bedrock
04/10/2018
<0.05
3.27
<1
<0.05
<1
NA
244
<0.2
2.22
<5
NA
NA
NA
NA
NA
<5
0.21
NA
<0.05
CW-03D IMP
Bedrock
07/25/2018
<0.05
3.04
<1
<0.05
<1
NA
273
<0.2
2.58
3.699 j
NA
NA
NA
NA
NA
<5
0.18
NA
<0.05
CW-03D IMP
Bedrock
11/13/2018
0.021 j
2.83
0.491 j
<0.05
<1
273
<0.2
3.36
<5
NA
NA
NA
NA
NA
<5
0.15
<0.05
CW-04
Transition Zone
01/30/2018
<0.05
5.86
<1
<0.05
<1
NA
188
<0.2
1.94
<5
NA
NA
NA
NA
NA
<5
0.32
NA
0.059
CW-04 IMP
Transition Zone
04/10/2018
<0.05
5.89
<1
<0.05
0.493 j
NA
183
<0.2
2.03
1.88 j
NA
NA
NA
NA
NA
<5
0.33
NA
<0.05
CW-04 IMP
Transition Zone
07/25/2018
<0.05
5.53
<1
<0.05
0.455j
NA
187
<0.2
2.18
1.824j
NA
NA
NA
NA
NA
<5
0.28
NA
<0.05
CW-04 IMP
Transition Zone
11/14/2018
<0.05
5.81
<1
0.053
0.469j
NA
180
<0.2
2.28
3.057j
NA
NA
NA
NA
NA
<5
0.26
NA
<0.05
CW-05
Transition Zone
01/31/2018
<0.05
<1
<1
0.26
<1
NA
329
<0.2
24.3
<5
0.0789 U
0.406 U
0.4849
NA
0.000179j
<5
0.57
NA
0.27
CW-05 IMP
Transition Zone
04/11/2018
<0.05
0.151j
0.664j
0.28
<1
NA
279
<0.2
26.8
<5
0.477 U
-0.00253 U
0.47447
NA
0.000222
<5
0.214j
NA
0.27
CW-05 IMP
Transition Zone
07/25/2018
<0.05
0.15j
0.738j
0.28
<1
NA
308
<0.2
25.8
<5
0.345
-0.0153 U
1 0.3297
NA
0.000578
1 <5
1 0.456j
I NA
1 0.29
CW-05 IMP
Transition Zone
11/13/2018
1 <0.05
0. 187j
0.468j
0.32
<1
NA
284
<0.2
32.2
<5
0.447 U
0. 142 U
1 0.589
1 0.000153j
1 0.000153j
1 <5
1 0.257j
I NA
1 0.32
Page 6 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
PH
6.5
Water
Level
23.88
Temp
17
Spec
Coed
1494
DO
0.44
ORP
73
Eh
278
Turbidity
1.6
Alkalinity
310
Bi-
carbonate
Alkalinity
310
Sulfide
<0.1
Total
Organic
Carbon
2.8 SI
Total
Suspended
Solids
<5
Boron
2350
Calcium
165
Chloride
59
Strontium
972
Sulfate
740
Total
Dissolved
Solids
1200
Aluminum
53 B3
Antimony
<1
Arsenic
<1
Barium
37
Beryllium
<1
Cadmium
<1
Chromium
(VI)
0.68
Chromium
<1
Cobalt
<1
Copper
<1
Iron
44
Lead
<1
GMW-06
Transition Zone
01/23/2018
GMW-06 IMP
Transition Zone
04/10/2018
6.5
21.72
19
1581
0.36
305
510
5.8
301
301
<0.1
2.6 S1
<5
2540
176
60
1050
600
1300
57
<1
<1
31
<1
<1
0.53
0.72j
<1
0.399j
53
<1
GMW-06
Transition Zone
07/26/2018
6.4
22.00
17
1614
0.68
202
407
0.5
311
311
<0.1
2.7
<5
2500
178
57
1060
570
1300
7
<1
<1
31
<1
<1
0.64
0.746 j
<1
<1
S. 106 j
<1
GMW-06 IMP
Transition Zone
11/12/2018
6.3
18.55
16
1701
0.27
310
515
4.3
269
269
<0.1
2.5
<5
2700
185
55
1070
610
1300
70
<1
<1
31
<1
<1
0.51
0.87j
<1
<1
51
<1
GMW-07
Bedrock
01/31/2018
6.8
27.83
15
1396
0.60
40
245
1.6
378
378
<0.1
4.2
<5
1430
112
190
716
240
980
39
<1
<1
176
<1
<1
0.3
<1
<1
1.71 S1
35
<1
GMW-07 IMP
Bedrock
04/10/2018
6.7
26.75
18
1397
1.96
295
500
4.3
207
207
<0.1
2 S1
<5
2000
93.5
230
668
200
920
39
<1
<1
166
<1
<1
0.14
2.33
<1
0.854j
46
<1
GMW-07
Bedrock
07/25/2018
6.4
27.28
21
1630
1.46
158
363
5.4
268
268
<0.1
3 SS
<5
2060
117
230
661
240
970
132
<1
1.39
187
<1
<1
0.31 M1
1.17
<1
1.06
117
<1
GMW-07 IMP
Bedrock
11/13/2018
6.5
22.45
16
1564
2.32
414
619
9.6
199
199
<0.1
2.3
<5
2470
105
300
649
340
870
396
<1
<1
168
<1
<1
0.2
0.787j
<1
0.87j
283
<1
GMW-08
Bedrock
01/31/2018
6.6
47.30
13
2043
0.79
40
245
4.0
398
398
<0.1
3.4 S1
<5
4270
255
180
989
510
1400
52
<1
<1
47
<1
<1
<0.025
1.2
<1
2.52 S1
8o
<1
GMW-08 IMP
Bedrock
04/11/2018
6.6
47.02
15
2044
0.55
276
481
7.6
425
425
<0.1
3.2
<5
4090
256
180
945
520
1400
49
<1
<1
48
<1
<1
<0.025 P4,R0
7.65
<1
1.67
94
<1
GMW-08
Bedrock
07/26/2018
6.5
46.65
20
1971
1.64
165
370
1.3
409
409
<0.1
3.4
<5
3910
233
170
909
480
1400
26
<1
<1
41
<1
<1
0.036
3.21
<1
3.19
42
<1
GMW-08R
Bedrock
09/06/2018
6.6
43.89
21
1895
3.30
80
285
5.1
377
377
<0.1
4
<5
3580
217
170
949
440
1400
15
<1
0.636j
64
<1
<1
0.13
0.433j
0.924j
1.02
23
<1
GMW-08R
Bedrock
09/20/2018
6.6
43.90
19
1848
2.43
120
325
1.6
372
372
<0.1
4.1 S1
<5
3520
211 B2,M4
170
949
440
1300
23
<1
0.497j
64
<1
<1
0.16
0.423j
0.774j
1.17
27
<1
GMW-08R IMP
Bedrock
11/12/2018
6.6
42.81
11
1943
1.81
259
464
2.6
344
344
<0.1
3.9
<5
3440
216
170
922
430
1300
51
<1
0.734j
84
<1
<1
0.095
<1
0.728j
0.78j
44
<1
GMW-09
Bedrock
01/23/2018
6.3
24.99
17
131
7.10
99
304
0.9
44.2
44.2
<0.1
0.789 SI
<5
<50
5.76
3.1
67
17
140
32 B3
<1
<1
32
<1
<1
0.15
<1
<1
<1
26
<1
GMW-09 IMP
Bedrock
04/11/2018
6.3
23.83
16
170
8.28
299
504
1.0
48.8
1 48.8
<0.1
10.761SI
<5
<50
8.47
3.7
96
23
140
62
<1
<1
40
<1
<1
0.13
<1
<1
<1
33
<1
GMW-09
Bedrock
07/26/2018
6.0
22.88
16
221
6.60
191
396
0.5
54.8
54.8
<0.1
1
<5
<50
12.9
4.2
139
40
190
24
<1
<1
58
<1
<1
0.13
<1
<1
<1
14
<1
GMW-09 IMP
Bedrock
11/12/2018
6.1
20.06
15
136
8.56
287
492
3.1
45.4
45.4
<0.1
0.823 SS
<5
<50
6.12
2.9
74
14
230
75
<1
<1
31
<1
<1
0.13
<1
<1
0.541j
50
<1
GMW-10
Bedrock
01/23/2018
6.3
33.27
17
264
3.13
157
362
4.0
83.6
83.6
<0.1
0.969 S1
19
102
14.5
19
120
26
200
518 B3
<1
<1
86
<1
<1
0.14
<1
<1
1.08
449
<1
GMW-10 IMP
Bedrock
04/11/2018
6.1
28.32
18
312
5.11
303
508
6.9
83.5
83.5
<0.1
1.1 S1
6
126
17.6
18
146
43
210
408
<1
<1
97
<1
<1
0.14
0.379j
<1
0.803j
188
<1
GMW-10
Bedrock
07/26/2018
5.7
30.31
18
301
3.57
210
415
2.1
77.5
77.5
<0.1
1
<5
100
15.8
19
134
40
220
103
<1
<1
90
<1
<1
0.16
<1
<1
0.471j
69
<1
GMW-10 IMP
Bedrock
11/12/2018
5.9
23.90
12
294
6.19
322
527
8.1
72.5
72.5
<0.1
1.1 S1
<5
138
19.4
18
151
61
140
66
<1
<1
104
<1
<1
0.16
<1
<1
0.593j
39
<1
GMW-11
Bedrock
02/01/2018
6.4
20.01
13
1476
1.12
303
508
8.5
225
225
<0.1
1.5 S1
<5
4530
154
29
616
640
1200
258
<1
<1
55
<1
<1
0.2
<1
<1
<1
367
<1
GMW-11 IMP
Bedrock
04/11/2018
6.5
18.70
12
1169
1.23
281
486
3.7
205
205
<0.1
1.5 S1
<5
3000
120
28
480
440
870
61
<1
<1
42
<1
<1
0.26
0.578j
<1
0.443j
76
<1
GMW-11
Bedrock
07/27/2018
6.4
18.13
18
1270
1.37
217
422
2.6
196
196
<0.1
1.5 S1
<5
3450
127
29
541
520
930
114
<1
<1
49
<1
<1
0.22
0.641j
<1
0.603j
162
<1
GMW-11 IMP
Bedrock
11/12/2018
6.4
15.60
8
1130
1.89
302
507
6.4
185
185
<0.1
1.6 S1
<5
2190
95.2
31
451
350
840
20
<1
<1
40
<1
<1
0.3
0.668j
<1
0.403j
25
<1
GPMW-OIBR
Bedrock
01/25/2018
6.7
24.66
16
2011
0.32
-57
148
0.9
161
161
<0.1
2 S1
<5
1510
207
22
1200
1100
1700
10
<1
1.15
43
<1
<1
<0.025
<1
<1
<1
906
<1
GPMW-01BR
Bedrock
04/12/2018
6.4
23.30
18
2049
0.31
-50
155
0.8
189
189
<0.1
1.9 S1
<5
1460
236
23
1110
1100
1700
21
<1
1.64
39
<1
<1
<0.025
<1
0.845j
<1
1240
<1
GPMW-OIBR
Bedrock
07/31/2018
6.6
22.53
20
2059
0.57
159
364
0.4
150
150
<0.1
1.9 SS
<5
1620
232
25
1320
1200
1800
38
<1
1.06
47
<1
<1
<0.025
<1
0.54j
<1
833
<1
GPMW-01BR
Bedrock
11/15/2018
6.6
21.26
16
1771
0.33
-12
193
1.3
137
137
<0.1
1.9
<5
1600
228
21
1290
1100
1700
15 S1
<1
0.743j
45
<1
<1
<0.025
<1
0.474j
0.91j
593
<1
GPMW-01D
Transition Zone
01/25/2018
6.7
22.41
14
2028
2.31
53
258
1.1
152
152
<0.1
2 S1
<5
939
220
23
1420
1100
1700
11
<1
<1
58
<1
<1
<0.025 M1,R1
<1
<1
<1
62
<1
GPMW-01D
Transition Zone
04/12/2018
6.3
20.68
18
2040
0.46
28
233
1.2
151
151
<0.1
1.8 Sl
<5
968
244
23
1380
1100
1700
24
<1
<1
54
<1
<1
<0.025
<1
<1
0.606j
95
<1
GPMW-01D
Transition Zone
07/31/2018
6.6
19.36
22
2062
0.54
192
397
0.9
144
144
<0.1
1.8 SS
<5
1110
233
24
1510
1200
1800
24
<1
<1
57
<1
<1
<0.025
<1
<1
0.418 j
53
<1
GPMW-01D
Transition Zone
11/15/2018
6.6
18.07
13
1687
0.58
65
270
1.7
134
134
<0.1
1.8
<5
1150
237
21
1550
1200
1700
39
<1
<1
56
<1
<1
<0.025
0.425j
<1
0.894j
66
<1
GPMW-01S
Saprolite
01/25/2018
6.3
21.60
16
1972
1.14
83
288
3.3
121
121
<0.1
2.7 S1
<5
1380
229 M4
17
2310
1100
1700
71
<1
<1
74
<1
<1
<0.025
<1
9.04
<1
257
<1
GPMW-01S
Saprolite
04/12/2018
5.9
19.80
18
2160
0.30
61
266
1.2
104
104
<0.1
2.5 S1
<5
1610
291
20
2580
1300
1900
22
<1
<1
66
<1
<1
<0.025
<1
10.5
0.534j
138
<1
GPMW-01S
Saprolite
07/31/2018
6.2
18.24
22
2212
0.72
195
400
3.6
86.2
86.2
<0.1 M1,R1
2.3 S1
<5
1940
293
21
3020
1400
2000
19
<1
<1
68
<1
<1
<0.025
<1
9.56
<1
231
<1
GPMW-01S
Saprolite
11/15/2018
6.2
16.92
12
1707
0.45
70
275
2.9
97.5
97.5
<0.1
2.5
<5
2180
252 M4
13
2450
1200
1700
119
<1
<1
57
<1
<1
<0.025
<1
12.3
1.34
345
<1
GPMW-02BR
Bedrock
01/25/2018
6.8
25.67
15
2170
0.18
-80
125
1.5
328
328
<0.1
2.3 S1
<5
2350
360
56
1210
1100
1900
8
<1
<1
57
<1
<1
<0.025
<1
<1
<1
236
<1
GPMW-02BR
Bedrock
04/12/2018
6.3
24.05
16
2277
0.73
-61
144
1.5
332
332
<0.1
2.2 S1
<5
2490
407
59
1200
1100
1900
23
<1
<1
54
<1
<1
<0.025 P4,R0
<1
0.511j
<1
302
<1
GPMW-02BR
Bedrock
07/31/2018
6.5
24.22
19
2255
0.20
34
239
2.6
326
326
<0.1
2.3 S1
<5
2530
398
61
1340
1100
2000
21
<1
<1
59
<1
<1
<0.025
<1
0.474j
<1
139
<1
GPMW-02BR
Bedrock
11/15/2018
6.6
22.45
14
2290
0.23
-24
181
4.5
286
286
<0.1 M1
2.3
<5
2570
418
63
1370
1200
2000
14
<1
<1
59
<1
<1
<0.025
<1
0.684j
0.847j,S1
332 S1
<1
GPMW-02D
Transition Zone
01/25/2018
6.9
25.55
15
1489
0.19
-137
68
2.5
201
201
<0.1
7.7
96
<50
140
50
840
530
1000
111
<1
2.11
310
<1
<1
<0.025
<1
7.83
<1
100000
<1
GPMW-02D
Transition Zone
04/12/2018
6.5
23.48
16
1514
0.27
-141
64
2.6
214
214
<0.1
7.7
110
<50
148
50
818
540
1000
112
<1
2.16
294
<1
<1
<0.025
<1
7.5
2.79
99500 M4
<1
GPMW-02D
Transition Zone
07/31/2018
6.7
23.57
20
1558
0.25
153
358
6.5
211
211
<0.1
8 S1
83
<50
156
54
1010
610
1200
171
<1
2.31
323
<1
<1
<0.025
<1
6.61
<1
93700
<1
GPMW-02D
Transition Zone
11/15/2018
6.7
21.60
13
1617
0.28
-70
135
7.1
192
192
<0.1
8.4
110
<50
160
52
985
680
1100
85
<1
2.43
292
<1
<1
<0.025
0.358j
7.31
<1
93000
<1
GPMW-03BR
Bedrock
01/25/2018
7.4
22.94
14
1055
0.72
-83
122
2.4
91.6
91.6
0.28
1.3 S1
<5
241
171
16
875
420
780
13
<1
1.15
29
<1
<1
<0.025
<1
<1
<1
199
<1
GPMW-03BR
Bedrock
04/11/2018
7.4
21.47
18
1066
0.44
-41
164
4.6
97.2
97.2
<0.1
1.1 51
<5
237
157
16
858
620
730
10
<1
1.2
28
<1
<1
<0.025
<1
<1
<1
144
<1
GPMW-03BR
Bedrock
07/31/2018
7.5
21.98
22
1038
0.66
84
289
0.6
97.5
97.5
<0.1
1.2 SI
<5
238
152
17
904
440
760
10
<1
1.01
27
<1
<1
<0.025
<1
<1
<1
66
<1
GPMW-03BR
Bedrock
11/15/2018
7.4
21.98
12
959
0.87
-85
120
3.1
88.6
88.6
<0.1
1.2
<5
221
154
16
854
440
720
9
<1
1.75
26
<1
<1
<0.025
<1
0.345j
0.85j
190
<1
GPMW-03D
Transition Zone
01/25/2018
5.8
17.83
16
2045
0.40
57
262
6.5
83.6
83.6
<0.1
1.8 51
<5
1750
260
25
1690
1300
1800
100
<1
<1
36
<1
<1
0.049
<1
4.28
1.4
557
<1
GPMW-03D
Transition Zone
04/11/2018
5.9
14.24
17
1990
0.44
74
279
9.6
75.8
75.8
<0.1
1.4 S1
<5
1540
268
19
1660
1100
1800
101
<1
<1
35
<1
<1
<0.025
0.454j
5.29
1.48
752
<1
GPMW-03D
Transition Zone
07/31/2018
6.0
15.35
20
1945
0.72
194
399
7.1
64
64
<0.1
1.5 S1
<5
1240
259 M4
14
1580
1200
1800
31
<1
<1
33
<1
<1
0.061
<1
6.02
0.999 j
355
<1
GPMW-03D
Transition Zone
11/15/2018
6.0
10.84
14
1780
0.83
129
334
4.7
66.6
66.6
<0.1
1.6
<5
1300
272
12
1640
1300
1800
29
<1
<1
32
<1
<1
0.07
<1
1.26
1.35
276
<1
MW-01BR
Bedrock
02/01/2018
6.6
31.36
13
1036
0.50
279
484
10.0
417
417
<0.1
2 S1
10
1550
86.5
41
511
110
610
365
<1
<1
339
<1
<1
<0.025
2.45
1.33
1.57
615
<1
MW-01BR
Bedrock
04/11/2018
6.7
28.92
17
1001
0.33
280
485
7.6
448
448
<0.1
2 SI
<5
1570
88.8
40
493
110
610
272
<1
0.374j
333
<1
<1
0.026
3.9
1.54
1.24
486
<1
MW-01BR
Bedrock
07/31/2018
6.4
30.39
23
984
2.08
295
500
9.8
436
436
<0.1
2.1 S1
7
1330
82.6
41
495
98
610
233
0.798j
0.368j
354
<1
<1
0.065
3.63
1.83
1.66
438
<1
MW-01BR
Bedrock
11/14/2018
6.5
29.00
15
1111
0.88
329
534
7.3
382
382
<0.1
2.1
<5
1930
91.2
44
523
140
660
176
0.845j
<1
266
<1
<1
0.17
1.83 B2
1.68
2.58
371
<1
Page 7 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Lithium
27
Magnesium
68.4
Manganese
36
Mercury
<0.05
Molybdenum
<1
Nickel
2.01
Nitrate +
Nitrite
0.564
Potassium
5.22
Selenium
62.9
Sodium
105
Thallium
<0.2
Vanadium
4.12
Zinc
28
Aluminum
(0.45u)
<5
Antimony
(0.45u)
<1
Arsenic
(0.45u)
<1
Barium
(0.45u)
28
Beryllium
(0.45u)
<1
Boron
(0.45u)
2400
Cadmium
(0.45u)
<1
Chromium
(0.45u)
<1
Cobalt
(0.45u)
<1
Copper
(0.45u)
<1
Iron
(0.45u)
<10
Lead
(0.45u)
<1
Lithium
(0.45u)
6
Manganese
(0.45u)
9
GMW-06
Transition Zone
01/23/2018
GMW-06 IMP
Transition Zone
04/10/2018
6 B2
73.2
10
0.028j
0.473j
1.01
0.507
5.3
64.8
110
<0.2
4.18
<5
2.042j
<1
<1
28
<1
2330
<1
0.686j
<1
<1
<10
<1
2.764j
7
GMW-06
Transition Zone
07/26/2018
3.415j
74.6
5
0.019j
0.417j
1.01
0.525
5.3
61
112
<0.2
4.25
<5
<5
<1
<1
30
<1
2500
<1
0.752j
<1
<1
<10
<1
4.348j
4.666j
GMW-06 IMP
Transition Zone
11/12/2018
4.098j
72.9
8
0.03j
0.44j
0.751j
0.472
5.32
57.6
112
<0.2
4.14
<5
1.701j
<1
<1
31
<1
2780
<1
0.814j
<1
0.365j
<10
<1
<5
5
GMW-07
Bedrock
01/31/2018
7
81.3
<5
0.12
<1
<1
0.512
6.55
5.99
103
<0.2
6.84
<5
<5
<1
<1
131
<1
1590
<1
<I
<1
<1
<10
<1
6
<5
GMW-07 IMP
Bedrock
04/10/2018
10 B2
62
1.866j
0.033j
0.871j
1.61
0.732
3.64
13.1
108
<0.2
7.05
<5
<5
<1
<1
130
<1
1750
<1
1.45
<1
0.577j
52
<1
4.025j
2.415j
GMW-07
Bedrock
07/25/2018
4.685j
76
2.484j
0.15
1.52
1.05
0.655
4.73
12
106
0.092j
6.86
3.006j
<5
<1
<1
142
<1
2160
<1
0.361j
<1
0.573j
3.505j
<1
7
<5
GMW-07 IMP
Bedrock
11/13/2018
3.707j
65.4
7
0.046j
0.795j
0.515j
0.817
3.95
17.5
107
<0.2
7.15
<5
<5
<1
<1
127
<1
2370
<1
0.634j
<1
0.615j
17
<1
3.745j
3.804j
GMW-08
Bedrock
01/31/2018
37
97.3
43
<0.05
3.48
1.48
0.272
10.4
<1
86.1
<0.2
1.72
<5
8
<1
<1
45
<1
4130
<1
<1
<1
1.81
12
<1
35
36
GMW-08 IMP
Bedrock
04/11/2018
34
98
65
<0.05
3.28
5.53
0.258
10.8
<1
81.8
0.089j
1.77
<5
4.148j
<1
<1
46
<1
3800
<1
2.34
<1
1.36
38
<1
33
62
GMW-08
Bedrock
07/26/2018
38
94.4
52
<0.05
3.3
1.4
0.261
10.1
<1
82.7
<0.2
2
3.954j
2.089j
<1
<1
44
<1
3990
<1
2.34
<1
2.45
4.777j
<1
38
56
GMW-08R
Bedrock
09/06/2018
61
85.6
193
<0.05
13.7
5.05
0.361
10.5
<1
88.1 B2
<0.2
2.32
40
3.226j
<1
0.494j
60
<1
3640
<1
0.607j
0.753j
0.889j
9.155j
<1
65
160
GMW-08R
Bedrock
09/20/2018
58
83.9 M4
171
<0.05
12.7
3.88
0.349
11.2
<1
86.3
<0.2
2.29
29
2.592j
<1
0.426j
55
<1
3410
<1
0.359j
0.552j
0.764j
<10
<1
61
115
GMW-08R IMP
Bedrock
11/12/2018
44
77.5 M4
258
<0.05
13.2
3.69
0.596
15.7
0.38j
88.5 M4
<0.2
2.17
37
2.835j
<1
0.573j
73
<1
3580
<1
0.401j
0.471j
0.647j
<10
<1
55
146
GMW-09
Bedrock
01/23/2018
6
1.69
<5
<0.05
<1
<1
0.334
0.928
<1
20 B1
<0.2
3.92
7
<5
<1
<1
30
<1
<50
<1
<1
<1
<1
<10
<1
<5
<5
GMW-09 IMP
Bedrock
04/11/2018
3.352 j
2.44
<5
<0.05
0.13 j
<1
0.439
1.01
<1
22.1
<0.2
3.78
<5
3.215 j
<1
<1
37
<1
<50
<1
<1
<1
<1
6.513 j
<1
4.21 j
<5
GMW-09
Bedrock
07/26/2018
4.34j
3.79
<5
<0.05
0.096j
<1
0.742
1.11
<1
25.1
<0.2
3.76
<5
1.944j
<1
<1
54
<1
<50
<1
<1
<1
1.48
<10
<1
6
<5
GMW-09 IMP
Bedrock
11/12/2018
4.032j
1.8
<5
0.02j
0.235j
<1
0.586
0.886
<1
20.2
<0.2
3.91
<5
2.065j
<1
<1
29
<1
<50
<1
<1
<1
<1
<10
<1
2.435j
<5
GMW-10
Bedrock
01/23/2018
<5
7.18
16
<0.05
<1
1.68
0.536
3.07
<1
30.7
<0.2
3.47
<5
<5
<1
<1
80
<1
107
<1
<I
<1
<1
<10
<1
<5
<5
GMW-10 IMP
Bedrock
04/11/2018
3.07 j
8.77
2.671 j
<0.05
0.825 j
1.25
0.648
3.19
2.28
32.4
<0.2
2.83
<5
4.755 j
<1
<1
92
<1
124
<1
<1
<1
0.7 j
3.388 j
<1
3.13 j
<5
GMW-10
Bedrock
07/26/2018
3.999 j
8.1
<5
<0.05
0.974 j
2.22
0.711
3.04
2.39
32.8
<0.2
2.85
2.071 j
2.854 j
<1
<1
92
<1
117
<1
<1
<1
<1
<10
<1
4.725 j
<5
GMW-10 IMP
Bedrock
11/12/2018
3.953 j
9.52
<5
0.023 j
0.678 j
1.46
0.822
3.26
4.87
33.8
<0.2
2.4
<5
2.559 j
<1
<1
107
<1
142
<1
<1
<1
0.704 j
<10
<1
2.579 j
<5
GMW-11
Bedrock
02/01/2018
<5
98.7
6
<0.05
1.18
5.6
0.956
8.35
141
65.6
<0.2
6.11
<5
<5
<1
<1
51
<1
4700
<1
<1
<1
<1
<10
<1
<5
<5
GMW-11 IMP
Bedrock
04/11/2018
<5
75.2
<5
<0.05
1.11
4.92
0.473
6.03
82.9
55.9
0.119 j
5.78
<5
<5
<1
<1
41
<1
3130
<1
0.445 j
<1
0.382 j
<10
<1
<5
<5
GMW-11
Bedrock
07/27/2018
<5
80.9
2.981 j
<0.05
0.834 j
5.6
0.553
6.09
96.6
56.4
<0.2
6.27
2.369 j
1.821 j
<1
<1
45
<1
3130
<1
<1
<1
<1
3.783 j
<1
<5
<5
GMW-11 IMP
Bedrock
11/12/2018
1.771j
62.2
<5
0.021
0.6631
3.54
0.373
4.56
100
50.5
<0.2
6.61
<5
1.877j
<1
<1
44
<1
2940
<1
0.48j
<1
0.918j
<10
<1
<5
<5
GPMW-01BR
Bedrock
01/25/2018
<5
150
154
<0.05
3.58
1.5
<0.01
4.86
<1
56.7 B1
<0.2
0.472
<5
<5
<1
<1
44
<1
1550
<1
<1
<1
<1
718
<1
<5
129
GPMW-01BR
Bedrock
04/12/2018
<5
170
189
<0.05
4.88
1.25
<0.01
5.26
<1
61.6 M4
<0.2
0.43
7
3.319j
<1
1.07
45
<1
1550
0.59j
<1
0.64j
3.08
798
<1
2.837j
146
GPMW-OIBR
Bedrock
07/31/2018
2.215 j
175
141
<0.05
3.05
1.49
<0.01
4.88
<1
54.6
<0.2
0.824 B2
1.828 j
2.625 j
<1
0.64 j
44
<1
1520
<1
<1
0.473 j
<1
577
<1
<5
102
GPMW-OIBR
Bedrock
11/15/2018
<5
169
99
<0.05
3.14
1.61
0.0039j
4.43
<1
52.8
<0.2
0.74
9 S3
1.785j
<1
0.521j
44
<1
1560
<1
<1
<1
<1
344
<1
<5
72
GPMW-01D
Transition Zone
01/25/2018
<5
155
69
<0.05
<1
<1
<0.01
4.52
<1
47 B1
<0.2
3.25
<5
<5
<1
<1
60
<1
949
<1
<1
<1
<1
27 S1
<1
<5
69
GPMW-01D
Transition Zone
04/12/2018
<5
175
63
<0.05
0.543j
0.566j
<0.01
4.51
<1
46.9
<0.2
3.68
3.032j
2.432j
<1
0.451j
60
<1
1040
<1
<1
<1
<1
37
<1
3.535j
66
GPMW-01D
Transition Zone
07/31/2018
<5
171
62
<0.05
0.224j
0.566j
0.0064j
4.37
<1
48
<0.2
4.1 B2
<5
1.967j
<1
<1
58
<1
1060
<1
<1
<1
<1
23
<1
<5
59
GPMW-01D
Transition Zone
11/15/2018
<5
169
57
<0.05
0.463 j
0.674 j
<0.01
4.25
<1
48.3
<0.2
4.33
1.924 j
<5
<1
<1
55
<1
1150
<1
<1
<1
<1
16
<1
<5
55
GPMW-01S
Saprolite
01/25/2018
<5
127
2560
<0.05
<1
7.45
<0.01
1.14
<1
60.9 BS„M4
<0.2
5.76
<5
<5
<1
<1
70
<1
1470
<1
<1
8.14
<1
149
<1
<5
2760
GPMW-01S
Saprolite
04/12/2018
<5
162
3490
<0.05
0.672 j
7.95
<0.01
1.21
<1
60.9
<0.2
4.25
3.874 j
3.228 j
<1
0.361 j
70
<1
1620
<1
<1
8.94
0.372 j
105
<1
4.274 j
3200
GPMW-01S
Saprolite
07/31/2018
2.491 j
166
3360
<0.05
0.297 j
7.44
<0.01
1.15
<1
64.7
<0.2
4.64 B2
<5
3.117 j
<1
<1
65
<1
1780
<1
<1
6.9
<1
115
<1
1.812 j
2230
GPMW-01S
Saprolite
11/15/2018
<5
137 M4
3720
<0.05
0.288j
6.61
<0.01
0.982
<1
53.3
0.151j
4.59
9
2.633j
<1
<1
56
<1
2130
<1
<1
8.56
<1
140
<1
<5
2450
GPMW-02BR
Bedrock
01/25/2018
<5
114
799
<0.05
<1
4.23
<0.01
5.33
<1
31.2 B1
<0.2
1.22
<5
<5
<1
<1
57
<1
2340
<1
<1
<1
<1
151
<1
6
806
GPMW-02BR
Bedrock
04/12/2018
2.075j
135
1010
<0.05
0.857j
4.43
<0.01
5.62
<1
32.5
<0.2
1.33
3.453j
<5
<1
<1
60
<1
2610
<1
<1
0.44j
<1
170
<1
6
965
GPMW-02BR
Bedrock
07/31/2018
5
135
1030
<0.05
1
4.62
<0.01
5.5
<1
31.6
<0.2
1.39 B2
<5
2.595j
<1
<1
56
<1
2330
<1
<1
0.585j
<1
94
<1
4.446j
996
GPMW-02BR
Bedrock
11/15/2018
3.425j
134 B2
1220
<0.05
0.921j
4.92
<0.01
5.43
<1
32.7
<0.2
1.74
2.608j
<5
<1
<1
58
<1
2430
<1
<1
0.601j
<1
105
<1
3.741j
1160
GPMW-02D
Transition Zone
01/25/2018
<5
73.4
8450
<0.05
1.74
<1
0.021 S1
3.69
<1
24.6 B1
<0.2
0.801
<5
99
<1
2.14
318
<1
<50
<1
<1
7.14
<1
91500
<1
<5
8450
GPMW-02D
Transition Zone
04/12/2018
<5
86.2
8550
<0.05
1.5
2.42
0.015
3.62
<1
27.4
0.108 j
0.672
5
62
<1
2.35
335
<1
<50
<1
0.449 j
6.98
<1
96100
<1
<5
8600
GPMW-02D
Transition Zone
07/31/2018
<5
92.9
9520
<0.05
1.24
<1
0.013
3.56
<1
29.5
<0.2
0.612 B2
2.458 j
77
<1
2.2
307
<1
<50
<1
0.344 j
7.25
<1
90300
<1
<5
9360
GPMW-02D
Transition Zone
11/15/2018
<5
88.6 B2
10100
<0.05
1.29
<1
0.031
3.34
<1
28.9
<0.2
0.748
<5
62
<1
2.16
297
<1
<50
<1
0.37 j
6.81
<1
94900
<1
<5
10300
GPMW-03BR
Bedrock
01/25/2018
<5
9.33
59
<0.05
3.36
<1
<0.01
5.51
<1
72.5 B1
<0.2
0.512
<5
8
<1
<1
26
<1
229
<1
<1
<1
<1
229
<1
7
53
GPMW-03BR
Bedrock
04/11/2018
7
9.18
47
<0.05
3.4
<1
0.0082j
5.85
<1
69.6
<0.2
0.446
<5
7
<1
0.907j
23
<1
201
<1
<1
<1
<1
108
<1
6
39
GPMW-03BR
Bedrock
07/31/2018
10
9.81
6
<0.05
3.3
<1
0.012
7.02
<1
75.2
<0.2
0.466 B2
2.049 j
4.967 j
<1
0.736 j
21
<1
194
<1
<1
<1
<1
53
<1
6
15
GPMW-03BR
Bedrock
11/15/2018
9
9.2
100
<0.05
3.78
0.587j
<0.01
6.89
<1
71.7
<0.2
0.368
4.648j
4.639j
<1
1.4
22
<1
192
<1
<1
<1
<1
188
<1
6
77
GPMW-03D
Transition Zone
01/25/2018
<5
137
1000
<0.05
<1
5.01
0.492
1.98
30.2
40.4 B1
<0.2
2.07
<5
<5
<1
<1
35
<1
1740
<1
<1
5.94
1.14 SI
30 SI
<1
<5
1170
GPMW-03D
Transition Zone
04/11/2018
<5
142
810
<0.05
0.266j
3.77
0.758
1.84
41.3
38.7
<0.2
2.11
<5
1.84j
<1
<1
33
<1
1570
<1
<1
6.36
1.28
71
<1
<5
829
GPMW-03D
Transition Zone
07/31/2018
<5
142 M4
617
<0.05
0.282 j
2.86
0.751
1.76
68.1
37
<0.2
1.39 B2
2.182 j
1.9 j
<1
<1
31
<1
1190
<1
<1
7.6
0.947 j
235
<1
<5
718
GPMW-03D
Transition Zone
11/15/2018
<5
141
250
<0.05
0.334j
2.88
0.756
1.97
76.4
35.3
0.088j
1.72
3.001j
<5
<1
<1
33
<1
1210
<1
<1
2.43
0.779j
12
<1
<5
308
MW-OIBR
Bedrock
02/01/2018
7
48.9
481
<0.05
<1
3.89
0.05
8.73
5.89
75.8
<0.2
17.6
<5
<5
<1
<1
337
<1
1440
<1
<1
1.11
<1
141
<1
7
585
MW-OIBR
Bedrock
04/11/2018
4.793j
51
533
<0.05
0.594j
5.15
0.052
8.78
5.79
71
<0.2
14.9
1.827j
2.731j
<1
<1
314
<1
1540
<1
<1
1.01
<1
58
<1
6
565
MW-OIBR
Bedrock
07/31/2018
7
48.6
959
<0.05
0.62j
7.18
0.047
8.89
4.16
64.4
<0.2
12 B2
15
2.174j
<1
<1
319
<1
1430
<1
0.553j
1.25
0.479j
12
<1
5
753
MW-OIBR
Bedrock
11/14/2018
7
51.7
598
<0.05
0.823j
4.11
0.108
8.53
11.1
71.1
<0.2
18.2
7 B
2.325j
<1
<1
221
<1
2130
<1
<1
0.974j
<1
80
<1
7
462
Page 8 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
OTHER PARAMETERS
Mercury
(0.45u)
<0.05
Molybdenum
(0.45u)
<1
Nickel
(0.45u)
<1
Phosphorus
(0.45u)
0.14
Selenium
(0.45u)
63.8
Silver
(0.45u)
NA
Strontium
(0.45u)
989
Thallium
(0.45u)
<0.2
Vanadium
(0.45u)
3.99
Zinc
(0.45u)
<5
Radium-226
6.27
Radium-228
0.413 U
Total
Radium
6.683
Uranium-238
NA
Total
Uranium
0.00234
Carbonate
Alkalinity
<5
Fluoride
<1
Hardness
NA
Phosphorus
0.14
GMW-06
Transition Zone
01/23/2018
GMW-06 IMP
Transition Zone
04/10/2018
0.017j
0.409j
0.838j
0.15
61.8
NA
945
<0.2
3.84
2.383j
0 U
0.376 U
0.376
NA
0.00272
<5
0.645j
NA
0.14
GMW-06
Transition Zone
07/26/2018
<0.05
0.438j
1.02
0.15
59.6
NA
1040
<0.2
4.11
<5
0.786
0.75
1.536
NA
0.00225
<5
0.663j
NA
0.15
GMW-06 IMP
Transition Zone
11/12/2018
<0.05
0.444j
0. 513j
0.15
58.2
NA
1080
<0.2
3.9
<5
0.247 U
0.549 U
0.796
0.00193
0.00193
<5
0.521j
NA
0.15
GMW-07
Bedrock
01/31/2018
0.05
<1
1.06
0.11
5.96
NA
672
<0.2
6.81
<5
NA
NA
NA
NA
NA
<5
<1
NA
0.12
GMW-07 IMP
Bedrock
04/10/2018
0.023j
0.803j
8.04
0.16
12.5
NA
584
0.089j
6.5
<5
NA
NA
NA
NA
NA
<5
0.528j
NA
0.17
GMW-07
Bedrock
07/25/2018
0.05
0.608j
0.762j
0.13
13.8
NA
691
<0.2
7.11
3.004j
NA
NA
NA
NA
NA
<5
0.395j
NA
0.14
GMW-07 IMP
Bedrock
11/13/2018
0.029j
0.863j
0.517j
0.16
17.2
NA
637
<0.2
6.99
<5
NA
NA
NA
NA
NA
<5
<1
NA
0.17
GMW-08
Bedrock
01/31/2018
<0.05
3.46
1.11
<0.05
<1
NA
914
<0.2
1.5
<5
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
GMW-08 IMP
Bedrock
04/11/2018
<0.05
3.2
6.28
<0.05
<1
NA
910
<0.2
1.58
4.523 j
NA
NA
NA
NA
NA
<5
0.476 j
NA
<0.05
GMW-08
Bedrock
07/26/2018
<0.05
3.01
1.12
<0.05
<1
NA
932
<0.2
1.52
3.622 j
NA
NA
NA
NA
NA
<5
0.511 j
NA
<0.05
GMW-08R
Bedrock
09/06/2018
<0.05
12.6
4.64
<0.05
0.408j
NA
952
0.085j
2.49
31
0.149 U
0.44 U
0.589
0.014
0.014
<5
0.543j
NA
<0.05
GMW-08R
Bedrock
09/20/2018
<0.05
12
3.49
0.099
<1
NA
887
<0.2
2.58
21
0.265
0.583
0.848
0.0151
0.0151
<5
0.461j
NA
<0.05
GMW-08R IMP
Bedrock
11/12/2018
<0.05
11.3
2.47
0.055
<1
NA
944
<0.2
2.22
25
NA
NA
NA
NA
NA
<5
0.404j
NA
0.054
GMW-09
Bedrock
01/23/2018
<0.05
<1
<1
0.39
<1
NA
67
<0.2
3.72
<5
NA
NA
NA
NA
NA
<5
0.1
NA
0.38
GMW-09 IMP
Bedrock
04/11/2018
<0.05
0. 106 j
<1
0.4
<1
NA
89
<0.2
3.42
2.304 j
NA
NA
NA
NA
NA
<5
0.11
NA
0.39
GMW-09
Bedrock
07/26/2018
<0.05
0.292j
<1
0.37
<1
NA
131
<0.2
3.49
2.67j
NA
NA
NA
NA
NA
<5
0.11
NA
0.38
GMW-09 IMP
Bedrock
11/12/2018
<0.05
0.107j
<1
0.41 M1
<1
NA
69
<0.2
3.91
<5
NA
NA
NA
NA
NA
<5
0.16
NA
0.41
GMW-10
Bedrock
01/23/2018
<0.05
<1
1.21
0.24
1.02
NA
116
<0.2
2.78
<5
NA
NA
NA
NA
NA
<5
0.12
NA
0.27
GMW-10 IMP
Bedrock
04/11/2018
<0.05
0.76j
1.14
0.22
2.5
NA
138
<0.2
2.47
3.74j
NA
NA
NA
NA
NA
<5
0.12
NA
0.22
GMW-10
Bedrock
07/26/2018
<0.05
0.792 j
1.82
0.23
2.53
NA
133
<0.2
2.63
<5
NA
NA
NA
NA
NA
<5
0.13
NA
0.26
GMW-10 IMP
Bedrock
11/12/2018
<0.05
0.635 j
1.32
0.22
5.32
NA
160
<0.2
2.39
3.028 j
NA
NA
NA
NA
NA
<5
0.15
NA
0.23
GMW-11
Bedrock
02/01/2018
<0.05
1.3
5.27
<0.05
135
NA
571
<0.2
5.07
<5
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
GMW-11 IMP
Bedrock
04/11/2018
<0.05
1.08
5.09
<0.05
86.8
NA
476
<0.2
5.59
<5
NA
NA
NA
NA
NA
<5
0.487 j
NA
<0.05
GMW-11
Bedrock
07/27/2018
<0.05
0.825 j
4.68
<0.05
107
NA
504
<0.2
5.74
2.672 j
NA
NA
NA
NA
NA
<5
0.422 j
NA
<0.05
GMW-11 IMP
Bedrock
11/12/2018
<0.05
0.804j
4.24
0.065
100
NA
512
<0.2
5.74
2.275j
NA
NA
NA
NA
NA
<5
0.371j
NA
0.077
GPMW-01BR
Bedrock
01/25/2018
<0.05
2.56
1.13
<0.05
<1
NA
1220
0.312
0.714
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-01BR
Bedrock
04/12/2018
<0.05
3.1
1.27
<0.05
<1
NA
1260
<0.2
0.458
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-01BR
Bedrock
07/31/2018
<0.05
1.9
1.16
<0.05
<1
NA
1260
<0.2
0.862
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-01BR
Bedrock
11/15/2018
0.027 j,D2
1.62
0.662 j
<0.05
0.374 j
NA
1270
<0.2
1.21
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-01D
Transition Zone
01/25/2018
<0.05
<1
<1
<0.05
<1
NA
1480
<0.2
3.04
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-01D
Transition Zone
04/12/2018
<0.05
0.999 j
0.519 j
<0.05
<1
NA
1540
<0.2
3.28
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-01D
Transition Zone
07/31/2018
<0.05
0.307 j
0.701 j
<0.05
<1
NA
1520
<0.2
3.95
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-01D
Transition Zone
11/15/2018
<0.05
0.244 j
<1
<0.05
<1
NA
1530
<0.2
4.29
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-01S
Saprolite
01/25/2018
<0.05
<1
6.38
<0.05
<1
NA
2400
<0.2
4.9
<5
NA
NA
NA
NA
NA
<5
<2
NA
0.053
GPMW-01S
Saprolite
04/12/2018
<0.05
0.659 j
7.38
<0.05
<1
NA
2660
<0.2
3.96
<5
NA
NA
NA
NA
NA
<5
1.004 j
NA
<0.05
GPMW-01S
Saprolite
07/31/2018
<0.05
0.386 j
8.78
<0.05
<1
NA
2870
<0.2
5.34
2. 165 j
NA
NA
NA
NA
NA
<5
0.95 j
NA
<0.05
GPMW-01S
Saprolite
11/15/2018
0.061 j,D2
0.287 j
6.98
0.058
<1
NA
2420
<0.2
5.94
3.298 j
NA
NA
NA
NA
NA
<5
<2
NA
0.061
GPMW-02BR
Bedrock
01/25/2018
<0.05
<1
4.1
<0.05
<1
NA
1260
<0.2
1.27
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-02BR
Bedrock
04/12/2018
<0.05
0.837j
4.6
<0.05
<1
NA
1320
<0.2
1.1
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-02BR
Bedrock
07/31/2018
<0.05
0.911j
4.75
<0.05
<1
NA
1240
<0.2
1.4
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-02BR
Bedrock
11/15/2018
<0.05
1.02
4.7
<0.05
<1
NA
1280
<0.2
1.52
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-02D
Transition Zone
01/25/2018
<0.05
1.42
<1
0.083
<1
NA
885
<0.2
0.616
<5
NA
NA
NA
NA
NA
<5
<1
NA
0.089
GPMW-02D
Transition Zone
04/12/2018
<0.05
1.4
0.335 j
0.071
<1
NA
951
<0.2
0.497
<5
NA
NA
NA
NA
NA
<5
0.535 j
NA
0.078
GPMW-02D
Transition Zone
07/31/2018
<0.05
1.29
<1
0.062
<1
NA
933
<0.2
0.505
<5
NA
NA
NA
NA
NA
<5
0.491 j
NA
0.076
GPMW-02D
Transition Zone
11/15/2018
<0.05
1.23
<1
0.086
<1
NA
1010
<0.2
0.558
<5
NA
NA
NA
NA
NA
<5
<1
NA
0.089
GPMW-03BR
Bedrock
01/25/2018
<0.05
2.89
<1
<0.05
<1
NA
864
<0.2
0.369
<5
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
GPMW-03BR
Bedrock
04/11/2018
<0.05
3.18
<1
<0.05
<1
NA
819
<0.2
0. 167j
3.302j
NA
NA
NA
NA
NA
<5
0.241j
NA
<0.05
GPMW-03BR
Bedrock
07/31/2018
<0.05
3.34
<1
<0.05
<1
NA
782
<0.2
0.238j
2.413j
NA
NA
NA
NA
NA
<5
0.921j
NA
<0.05
GPMW-03BR
Bedrock
11/15/2018
<0.05
3.44
<1
<0.05
<1
NA
787
<0.2
0.653
<5
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
GPMW-03D
Transition Zone
01/25/2018
<0.05
<1
4.63
<0.05
26.5
NA
1780
<0.2
1.01
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-03D
Transition Zone
04/11/2018
<0.05
0.257 j
4.24
<0.05
46.9
NA
1670
<0.2
0.954
<5
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-03D
Transition Zone
07/31/2018
<0.05
0.274 j
2.98
<0.05
65
NA
1630
<0.2
0.95
3.998 j
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
GPMW-03D
Transition Zone
11/15/2018
0.018 j
0.218 j
1.98
<0.05
76
NA
1770
0. 174 j
1.57
3.306 j
NA
NA
NA
NA
NA
<5
<2
NA
<0.05
MW-01BR
Bedrock
02/01/2018
<0.05
<1
3.25
<0.05
5.04
NA
484
<0.2
12.8
<5
NA
NA
NA
NA
NA
<5
0.52
NA
0.073
MW-01BR
Bedrock
04/11/2018
<0.05
0.466j
3.38
0.062
6.29
NA
516
<0.2
13.1
6
NA
NA
NA
NA
NA
<5
0.4
NA
0.065
MW-01BR
Bedrock
07/31/2018
<0.05
0.608j
4.65
<0.05
5.19
NA
498
0.089j
12.4
9
NA
NA
NA
NA
NA
<5
0.4
NA
0.057
MW-01BR
Bedrock
11/14/2018
<0.05
0.457 j
2.32
0.083
11.9
NA
536
<0.2
17.6
2.377 j
NA
NA
NA
NA
NA
<5
0.39
NA
0.083
Page 9 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
pH
6.0
Wter
Level
13.49
Temp
15
Spec
Cond
2716
DO
0.30
ORP
442
Eh
647
Turbidity
0.6
Alkalinity
170
Bi-
carbonate
Alkalinity
170
Sulfide
<0.1
Total
Organic
Carbon
0.93 S1
Total
Suspended
Solids
<5
Boron
2720
Calcium
327
Chloride
790
Strontium
2290
Sulfate
200
Total
Dissolved
Solids
2200
Aluminum
6
Antimony
<1
Arsenic
<1
Barium
345
Beryllium
<1
Cadmium
<1
Chromium
(VI)
0.096
Chromium
<1
Cobalt
1.02
Copper
1.15
Iron
52
Lead
<1
MW-02
Saprolite
01/24/2018
MW-02
Saprolite
04/10/2018
6.0
12.45
16
3009
0.42
64
269
0.9
171
171
<0.1
0.795 S1
<5
2990
371
870
2390
220
3000
8
<1
<1
343
<1
<1
0.24 P4,110
0.725j
0.975j
1.68
71
<1
MW-02
Saprolite
07/26/2018
6.1
13.11
24
2835
0.66
-12
193
1.4
159
159
<0.1 M1
0.94
<5
3290
366
860
2460
220
2500
66
<1
<1
304
<1
<1
0.13
0.682j
1.13
1.42
168
<1
MW-02
Saprolite
11/15/2018
5.8
10.40
12
3340
0.22
461
666
3.3
151
151
<0.1
0.75 S1
<5
3780
395
930
2560
220
2400
101
<1
<1
287
<1
<1
0.11
1.18
1.24
1.71
186
<1
MW-02BR
Bedrock
02/01/2018
6.2
19.35
11
948
0.51
-87
118
5.5
255
255
<0.1
2.5 S1
16
<50
78.3
110
599
47
520
30
<1
1.13
1440
<1
<1
<0.025
<1
3.7
<1
20200
<1
MW-02BR
Bedrock
04/10/2018
6.3
14.68
14
875
0.65
-43
162
50.2
233
233
<0.1
2.2 S1
15
<50
70.4
110
550
48
530
21
<1
0.616j
813
<1
<1
<0.025
<1
4.42
0.541j
8900
<1
MW-02BR
Bedrock
07/31/2018
6.2
15.21
27
3
0.55
195
400
15.5
240
240
<0.1
2.3 S1
11
<50
76.4
100
591
49
520
34
<1
0.617j
1140
<1
<1
<0.025 M1
<1
3.35
<1
16100
<1
MW-02BR
Bedrock
11/16/2018
5.8
9.29
16
830
0.27
-20
185
45.6
223
223
<0.1
2.3
15
<50
63
99
490
48
470
16
<1
1.03
629
<1
<1
<0.025
1.21
5.06
<1
15300
<1
MW-03BR
Bedrock
01/31/2018
6.7
28.89
11
2564
0.62
33
238
9.5
310
310
<0.1
1.5 51
9
2770
362 M4
63
1460
1300
2300
251
<1
<1
41
<1
<1
<0.025
1.02
1.72
13.8
352
<1
MW-03BR
Bedrock
04/12/2018
6.6
26.07
17
2503
0.32
20
225
7.6
300
300
<0.1
1.3 S1
6
2570
390
67
1500
1300
2200
230
0.34j
<1
35
<1
<1
<0.025
0.71j
1.61
13
308
<1
MW-03BR
Bedrock
07/27/2018
6.7
26.77
18
2586
4.29
235
440
9.6
284
284
<0.1
1.4 S1
<5
2670
359
68
1 1560
1500
2300
46
<1
<1
36
<1
<1
<0.025
<1
1.12
13.4
59
<1
MW-03BR
Bedrock
11/15/2018
6.7
22.32
12
2597
0.60
322
527
3.0
280
280
<0.1
1.5
<5
2860
382
73
1550
1400
2300
95
<1
<1
36
<1
<1
<0.025
<1
1.09
18.4
121
<1
MW-04BR
Bedrock
01/30/2018
8.0
46.79
11
520
0.34
-140
65
9.8
256
256
<0.1
0.9 51
10
<50
43.1
19
281
33
280
98
<1
1.26
48
<1
<1
<0.025
1.45
<1
<1
323
<1
MW-04BR
Bedrock
04/10/2018
7.8
45.02
15
507
0.55
-127
78
4.1
198
198
<0.1
0.709 S1
<5
<50
42.9
20
259
34
270
28
0.914j
1.26
44
<1
<1
<0.025
0.436j
<1
<1
172
<1
MW-04BR
Bedrock
07/25/2018
7.3
45.72
22
924
2.14
-36
169
8.9
221
221
<0.1
0.853 SI
<5
<50
47.9 M4
18
277
32
270
6
0.619j
1.37
43
<1
<1
0.072 M1
0.43j
<1
0.544j
73
<1
MW-04BR
Bedrock
11/15/2018
7.5
45.30
13
552
2.28
104
309
3.8
215
215
<0.1
0.8 S1
<5
17.334j
51.6
19
293
32
260
10
<1
1.4
46
<1
<1
0.055
<1
<1
<1
303
<1
MW-05BR
Bedrock
01/31/2018
7.6
28.82
12
786
0.50
-105
100
5.3
198
198
<0.1
IA S1
<5
<50
107
16
315
210
500
103
<1
<1
18
<1
<1
<0.025
<1
3.22
<1
482
<1
MW-05BR
Bedrock
04/11/2018
7.3
27.50
14
839
0.32
167
372
9.3
204
204
<0.1
0.919 S1
<5
48.873j
113
16
309
260
540
95
<1
0.705j
17
<1
<1
<0.025
0.795j
2.99
0.542j
464
<1
MW-05BR
Bedrock
07/26/2018
7.0
28.07
26
816
0.54
20
225
2.4
197
197
<0.1
1
<5
48.97j
107
17
310
220
560
10
<1
0.386j
14
<1
<1
<0.025
<1
5.6
<1
347
<1
MW-05BR
Bedrock
11/14/2018
7.1
26.15
14
824
1.66
119
324
3.8
190
190
<0.1
0.9 S1
<5
52
107
16
288
210
520
7
<1
0.484j
14
<1
<1
<0.025
<1
7.68
<1
303
<1
MW-05D
Transition Zone
01/31/2018
6.9
9.78
12
840
3.18
22
227
3.4
80.8
80.8
<0.1
1.3 S1
<5
774
76.5
15
404
360
660
11
<1
<1
28
<1
<1
0.93
1.03
<1
<1
17
<1
MW-05D
Transition Zone
04/11/2018
6.6
8.60
14
887
3.77
297
502
1.3
76
76
<0.1
1 S1
<5
690
74.2
14
382
370
660
16
0.517 j
<1
27
<1
<1
0.58 M1
0.683 j
<1
0.562 j
18
<1
MW-05D
Transition Zone
07/27/2018
6.3
9.47
22
951
0.65
-28
177
4.9
75.4
75.4
<0.1
1 S3
<5
696
78.1 M4
12
434
390
680
5
0.712j
<1
29
<1
<1
0.67
0.657j
<1
0.515j
9.749j
<1
MW-05D
Transition Zone
11/15/2018
6.4
7.30
14
945
4.17
355
560
2.3
71.2
71.2
<0.1
1.2
<5
709
76.9
11
411
480
660
5
0.774j
<1
27
<1
<1
1.3
1.21
<1
0.51j
5.854j
<1
MW-06BR
Bedrock
01/31/2018
8.0
7.71
13
388
0.21
-166
39
1.6
208
208
0.12 M1
0.536 S1
<5
<50
38.8
7.8
152
14
220
39
<1
<1
8
<1
<1
<0.025
<1
<1
<1
497
<1
MW-06D
Transition Zone
01/31/2018
6.7
5.51
11
340
0.34
164
369
0.7
137
137
<0.1
0.728 S3
<5
<50
29.6
13
177
35
230
71
<1
<1
6
<1
<1
0.057
<1
<1
<1
62
<1
MW-07BR
Bedrock
01/31/2018
7.9
16.50
11
438
0.30
-110
96
5.0
180
180
<0.1
0.62 S1
<5
<50
55.3
6.1
143
18
260
27
<1
1.05
15
<1
<1
<0.025
<1
<1
<1
202
<1
MW-07BR
Bedrock
04/09/2018
7.1
13.76
15
338
3.27
104
309
3.9
136
136
<0.1
0.58 S1
<5
<50
34.8
7.2
112
28
220
48
<1
0.699j
14
<1
<1
0.24
0.341j
<1
0.858j
101
<1
MW-07BR
Bedrock
07/27/2018
7.0
14.47
20
320
2.43
87
292
5.1
120
120
<0.1
0.541 SI
<5
<50
28.1
7
96
26
180
39
<1
0.724j
12
<1
<1
0.15
<1
<1
0.793j
75
<1
MW-07BR
Bedrock
11/13/2018
6.7
9.60
14
286
2.33
147
352
1.8
104
104
<0.1
0.518
<5
<50
23.3
6
92
26
180
22
<1
0.636j
11
<1
<1
0.18
<1
<1
0.846j
53
<1
MW-08BR
Bedrock
01/31/2018
7.5
41.65
13
617
0.42
-139
66
8.9
316
316
<0.1
0.95 S1
11
<50
74.6
23
217
24
350
52
<1
<1
36
<1
<1
<0.025
7.22
<1
1.02 S1
2070
<1
MW-08BR
Bedrock
04/10/2018
7.1
41.62
15
611
0.41
-52
153
9.9
305
305
<0.1
0.79 S1
12
<50
80.9
27
219
27
390
120
0.38j
0.658j
34
<1
<1
<0.025 MI
2.26
<1
1.38
2390
<1
MW-08BR
Bedrock
07/30/2018
7.2
41.49
20
628
1.46
112
317
9.6
282
282
<0.1
0.906 SI
<5
<50
72.5
25
205
27
380
56
0.78j
0.355j
30
<1
<1
<0.025
0.516j
<1
2.54
1020
<1
MW-08BR
Bedrock
11/15/2018
7.1
40.43
12
589
2.11
-114
92
5.3
264
264
<0.1
0.81 S1
<5
<50
78.6
24
220
26
350
23
<1
0.504j
31
<1
<1
<0.025
0.351j
<1
1.28
2110
<1
MW-09BR
Bedrock
02/01/2018
7.2
37.29
14
383
0.37
56
261
8.2
145
145
<0.1
0.883 SI
<5
<50
24.8
13
187
23
200
67
<1
<1
25
<1
<1
<0.025
1.19
1.02
<1
159
<1
MW-09BR
Bedrock
04/10/2018
6.4
33.58
16
319
0.34
132
337
5.0
132
132
<0.1
0.74 S1
<5
<50
24.6
14
185
23
220
158
<1
<1
26
<1
<1
<0.025
0.386j
1.04
0.355j
203
<1
MW-09BR
Bedrock
07/30/2018
6.2
33.47
20
353
1.41
265
470
0.6
145
145
<0.1
1.2 SI
<5
<50
26.6
15
221
23
240
2.893j
<1
<1
28
<1
<1
0.025
<1
1.16
1.44
59 S1
<1
MW-09BR
Bedrock
11/14/2018
6.6
30.25
14
365
0.37
-28
177
2.0
134
134
<0.1
0.988 S1
<5
<50
27
17
233
24
220
8
<1
<1
29
<1
<1
<0.025
0.513 j,B2
1.27
<1
179
<1
MW-10BR
Bedrock
01/24/2018
6.9
24.90
14
556
1.31
36
241
0.5
224
224
<0.1
0.978 SI
<5
<50
49.4
18
177
40
320
<5
<1
<1
127
<1
<1
0.19
<1
16.1
<1
<10
<1
MW-10BR
Bedrock
04/10/2018
6.9
24.32
16
550
1.46
9
214
0.5
233
233
<0.1
0.922 SI
<5
<50
49.2
20
178
42
340
1.945j
<1
<1
141
<1
<1
0.13
<1
19.2
<1
8.903j
<1
MW-10BR
Bedrock
07/30/2018
7.0
24.16
20
548
0.70
104
309
1.3
226
226
<0.1
IA S1
<5
<50
48.4
18
167
39
340
4.853j
<1
<1
125
<1
<1
0.14
<1
15.8
0.457j
5.719 j,S1
<1
MW-10BR
Bedrock
11/14/2018
6.9
22.70
15
525
0.78
44
249
3.1
208
208
<0.1
0.995 SI
<5
<50
47.7
19
166
39
310
2.16j
<1
<1
122
<1
<1
0.24
<1
13.3
<1
14
<1
MW-11BR
Bedrock
01/23/2018
7.0
7.42
19
479
2.12
94
299
0.3
251
251
<0.1
0.897 S1
<5
<50
44.9
12
156
41
300
7 B3
<1
<1
161
<1
<1
0.085
<1
<1
<1
<10
<1
MW-11BR
Bedrock
04/11/2018
6.7
4.68
14
516
2.68
65
270
0.9
270
270
0.1
0.832 S1
<5
<50
49.4
14
186
41
320
17
<1
<1
191
<1
<1
0.069
<1
<1
0.556j
16
<1
MW-11BR
Bedrock
07/27/2018
6.6
5.01
25
544
1.81
-7
198
0.9
231
231
<0.1
0.788 S1
<5
<50
47.5
12
186
41
300
28
<1
<1
177
<1
<1
0.26
<1
<1
0.61j
42
<1
MW-11BR
Bedrock
11/15/2018
6.7
3.31
7
526
0.96
297
502
0.9
231
231
<0.1
0.91 S1
<5
<50
50.8
14
190
42
310
2.945j
<1
<1
191
<1
<1
0.11
<1
<1
<1
4.562j
<1
MW-11D
Transition Zone
01/23/2018
6.5
7.58
19
504
1.97
119
324
3.8
212
212
<0.1
1.4 S1
<5
<50
40.1
18
337
36
310
115 B3
<1
<1
180
<1
<1
<0.025
<1
4.51
2.7
332
<1
MW-11D
Transition Zone
04/11/2018
6.2
5.21
13
505
0.41
101
306
1.2
212
212
<0.1
1.1 SS
<5
<50
41.2
17
331
36
300
7
<1
<1
187
<1
<1
<0.025
<1
4.12
2.28
52
<1
MW-11D
Transition Zone
07/27/2018
6.9
5.58
31
513
5.89
-4
201
0.5
202
202
<0.1
IA SI
<5
<50
41.8
17
336
37
280
33
<1
<1
189
<1
<1
<0.025
<1
6.18
2.66
137
<1
MW-11D
Transition Zone
11/15/2018
6.3
5.51
7
470
0.48
301
506
1.0
181
181
<0.1
1.2
<5
<50
40.4
17
325
37
280
56
<1
<1
183
<1
<1
<0.025
<1
7.36
2.74
114
<1
MW-12BR
Bedrock
01/31/2018
7.6
6.01
12
721
0.25
-146
59
2.0
284
284
<0.1
1.7 SI
7
<50
94
49
255
34
410
17
<1
<1
51
<1
<1
<0.025
<1
4.67
<1
3120
<1
MW-12BR
Bedrock
04/10/2018
7.1
5.76
15
721
0.31
-82
123
0.4
285 M1
285
<0.1
1.5 S1
7
<50
97.6
57
250
38
460
14
<1
0.727j
51
<1
<1
<0.025
<1
5.92
<1
31SO
<1
MW-12BR
Bedrock
07/31/2018
7.0
5.30
19
747
0.61
33
238
0.7
289
289
<0.1
1.6 S1
7
<50
94 M4
54
250
39
450
24
<1
0.761j
49
<1
<1
<0.025
<1
12.8
<1
33SO
<1
MW-12BR
Bedrock
11/14/2018
7.1
3.54
13
730
0.37
-139
66
1.7
245
245
<0.1
1.6 SI
7
<50
89.8
56
235
39
420
16
<1
0.745j
44
<1
<1
<0.025
<1
21.9
<1
3090
<1
MW-13BR
Bedrock
01/23/2018
6.1
40.56
17
645
0.80
41
246
0.9
135
135
<0.1
4.1
<5
<50
48
90
402
35
380
17 B3
<1
<1
382
<1
<1
<0.025
<1
2.14
<1
185
<1
MW-13BR
Bedrock
04/10/2018
6.1
40.41
16
612
0.50
45
250
2.2
139
139
<0.1
4
<5
<50
49.2
99
425
36
420
3.394j
<1
<1
425
<1
<1
<0.025
<1
2.54
0.442j
126
<1
MW-13BR
Bedrock
07/27/2018
6.2
40.33
18
602
2.21
93
298
3.8
132
132
<0.1
4.1
<5
<50
49 M4
96
423
33
360
20
<1
<1
417
<1
<1
0.05 M1
<1
2.38
0.727j
153
<1
MW-13BR
Bedrock
11/14/2018
6.3
39.51
15
617
1.19
59
264
3.6
120
120
<0.1
4.3
<5
<50
50.1
99
442
34
380
3.943j
<1
<1
1 425
<1
<1
0.14
0.455j
2.07
0.42j
1 70
<1
Page 10 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Lithium
7
Magnesium
128
Manganese
65
Mercury
0.1
Molybdenum
<1
Nickel
3.64
Nitrate +
Nitrite
<0.01
Potassium
6.24
Selenium
<1
Sodium
50.8 B1
Thallium
<0.2
Vanadium
5
Zinc
<5
Aluminum
(0.45u)
24
Antimony
(0.45u)
<1
Arsenic
(0.45u)
<1
Barium
(0.45u)
354
Beryllium
(0.45u)
<1
Boron
(0.45u)
2780
Cadmium
(0.45u)
<1
Chromium
(0.45u)
<1
Cobalt
(0.45u)
1.16
Copper
(0.45u)
2.81
Iron
(0.45u)
59
Lead
(0.45u)
<1
Lithium
(0.45u)
23
Manganese
(0.45u)
91
MW-02
Saprolite
01/24/2018
MW-02
Saprolite
04/10/2018
10 B2
144
73
0.13
1.49
4.64
0.025
6.31
<1
50.2
<0.2
4.83
<5
<5
<1
<1
301
<1
2700
<1
<1
0.972j
0.991j
39
<1
4.542j
62
MW-02
Saprolite
07/26/2018
7
148
80
0.13 M2
0.648j
3.98
0.016
5.87
<1
51.7
0.159j
4.95
<5
1.782j
<1
<1
306
<1
3390
<1
<1
0.767j
0.735j
35
<1
7
68
MW-02
Saprolite
11/15/2018
5
153
71
0.11
0.899j
7.48
0.012
6.2
<1
52.6
<0.2
5.28
1.765j
<5
<1
<1
291
<1
3960
<1
0.624j
1.04
1.14
33
<1
4.03j
68
MW-02BR
Bedrock
02/01/2018
6
40.3
1450
<0.05
1.96
<1
0.016
4.48
<1
37.9
<0.2
<0.3
<5
27
<1
<1
941
<1
<50
<1
<1
3.94
<1
16600
<1
<5
1160
MW-02BR
Bedrock
04/10/2018
3.304j
39.6
1170
<0.05
1.76
1.17
0.341
4.29
<1
38.6
<0.2
0.142j
4.195j
11
<1
0.668j
1010
<1
<50
<1
<1
3.69
<1
11900
<1
4.74j
1090
MW-02BR
Bedrock
07/31/2018
3.815j
43.5
1290
<0.05
1.33
0.551j
0.184
4
<1
35.8
<0.2
0.193 j, B2
2.03j
14
<1
0.507j
1120
<1
<50
<1
<1
3.33
<1
13700
<1
3.348j
1270
MW-02BR
Bedrock
11/16/2018
3.048j
32.3
SOS
<0.05
2.69
0.893j
<0.01
4.12
<1
52.3
<0.2
<0.3
3.707j
12
<1
0.815j
600
<1
<50
<1
<1
5.06
<1
14700
<1
2.192j
878
MW-03BR
Bedrock
01/31/2018
<5
175 M4
65
0.07
<1
1.65
0.029
3.44
2.49
59.1
<0.2
14.9
<5
<5
<1
<1
35
<1
2580
<1
<1
1.58
<1
96
<1
6
62
MW-03BR
Bedrock
04/12/2018
<5
187
66
0.045j
0.326j
1.43
0.023
3.25
2.42
56.9
<0.2
14.4
8
<5
<1
<1
34
<1
2570
<1
<1
1.07
<1
38
<1
4.052j
55
MW-03BR
Bedrock
07/27/2018
1.818j
173
39
0.032j
0.241j
1.36
0.038
3.17
2.73
58.1
<0.2
15.9
3.451j
<5
<1
<1
36
<1
2700
<1
<1
0.93j
13
3.388j
<1
1.861j
36
MW-03BR
Bedrock
11/15/2018
<5
179
37
0.06
0.354j
1.29
0.03
3.21
2.4
59.8
<0.2
17.2
<5
9
<1
<1
36
<1
2910
<1
<1
0.871j
12.7
6.022j
<1
<5
36
MW-04BR
Bedrock
01/30/2018
12
17.6
58
<0.05
6.89
1.19
<0.01
9.14
<1
32.7 B2„B3
<0.2
0.57
10
6
<1
1.25
42
<1
<50
<1
<1
<1
<1
145
<1
14
44
MW-04BR
Bedrock
04/10/2018
15 B2
17.2
52
<0.05
5.9
0.557j
0.134
9.94
<1
32.6
<0.2
0.708
2.869j
8
1.17
0.997j
35
<1
<50
<1
0.467j
<1
<1
67
<1
11
32
MW-04BR
Bedrock
07/25/2018
9
18.5
35
<0.05
5.75
0.989j
0.088
8.36
<1
30.8
<0.2
0.861 st
6
3.808j
0.875j
1
39
<1
<50
<1
<1
<1
<1
19
<1
13
12
MW-04BR
Bedrock
11/15/2018
8
19.9
98
<0.05
7.4
0.521j
0.011
8.29
<1
31.1
<0.2
0.19j
<5
2.84j
0.337j
1.09
36
<1
<50
<1
<1
<1
<1
83
<1
10
71
MW-05BR
Bedrock
01/31/2018
<5
33.1
296
<0.05
2.25
<1
0.039
4.92
<1
17.7
<0.2
1.09
<5
5
<1
<1
17
<1
<50
<1
<1
2.64
<1
266
<1
<5
233
MW-05BR
Bedrock
04/11/2018
<5
33.7
314
<0.05
1.85
0.622j
0.023
4.74
<1
17.5
<0.2
0.809
<5
8
<1
0.683j
15
<1
48.457j
<1
<1
2.3
<1
311
<1
<5
227
MW-05BR
Bedrock
07/26/2018
<5
35.3
275
<0.05
1.87
0.372 j
0.0053 j
4.84
<1
17.7
<0.2
0.451
<5
3.842 j
<1
<1
14
<1
48.1 j
<1
<1
7.38
<1
389
<1
2.268 j
278
MW-05BR
Bedrock
11/14/2018
1.792j
31.9
447
<0.05
1.68
<1
<0.01
4.65
<1
16.9
0.094j
0.713
<5
3.192j
<1
<1
14
<1
51
<1
<1
22.1
<1
407
<1
2.616j
453
MW-05D
Transition Zone
01/31/2018
6
43.4
19
<0.05
4.7
<1
0.595
1.38
<1
56.4 B2„B3
<0.2
14
<5
<5
<1
<1
27
<1
765
<1
1.06
<1
<1
<10
<1
5
<5
MW-05D
Transition Zone
04/11/2018
2.269j
43.7
19
<0.05
4.82
1.04
0.555
1.26
0.565j
54.2
0.132j
13.5
<5
2.598j
0.514j
<1
26
<1
663
<1
0.785j
<1
0.377j
<10
<1
2.216j
<5
MW-05D
Transition Zone
07/27/2018
2.532 j
45.4
6
<0.05
4.24
0.874 j
0.463
1.22
0.375 j
62.1 M4
<0.2
14
2.462 j
2.455 j
0.59 j
<1
28
<1
666
<1
0.827 j
<1
0.552 j
3.955 j
<1
2.901 j
<5
MW-05D
Transition Zone
11/15/2018
2.636j
43.9
3.075j
<0.05
4.91
0.861j
0.309
1.22
0.452j
56.9
<0.2
16
2.948j
2.097j
0.668j
<1
26
<1
691
<1
1.3
<1
0.754j
<10
<1
2.241j
<5
MW-06BR
Bedrock
01/31/2018
<5
24.2
96
<0.05
2.82
<1
<0.01
1.88
<1
13.2 B2„B3
<0.2
<0.3
<5
8
<1
<1
8
<1
<50
<1
<1
<1
<1
426
<1
<5
85
MW-06D
Transition Zone
O1/31/2018
<5
20.6
5
<0.05
<1
<1
0.242
1.33
<1
13.5 B2„B3
<0.2
6.63
<5
<5
<1
<1
5
<1
<50
<1
<1
<1
<1
<10
<1
<5
<5
MW-07BR
Bedrock
01/31/2018
<5
15.6
326
<0.05
1.28
<1
0.053
3.67
<1
14.2 B2„B3
<0.2
2.58
<5
<5
<1
<1
13
<1
<50
<1
<1
<1
<1
97
<1
<5
90
MW-07BR
Bedrock
04/09/2018
<5
11.8
32
<0.05
1.27
<1
1.4
3.3
0.846 j
17.2
<0.2
12.7
4.852 j,S1
2.315 j
<1
0.694 j
13
<1
<50
<1
0.348 j
<1
0.979 j
<10
<1
<5
<5
MW-07BR
Bedrock
07/27/2018
<5
11.6
17
<0.05
1.1
<1
1.4
2.81
0.802j
17.7
<0.2
16.7
8
2.465j
<1
0.769j
12
<1
<50
<1
<1
<1
0.388j
5.005j
<1
<5
<5
MW-07BR
Bedrock
11/13/2018
<5
11.8
19
0.019j
1.24
<1
1.3
2.52
0.705j
18.2
<0.2
18.4
9
1.918j
<1
0.549j
10
<1
<50
<1
<1
<1
0.743j
<10
<1
<5
<5
MW-08BR
Bedrock
01/31/2018
<5
23.2
730
<0.05
2.86
6.16
<0.01
5.6
<1
22.8
<0.2
0.681
18
5
<1
<1
33
<1
<50
<1
<1
<1
<1
1490
<1
6
633
MW-08BR
Bedrock
04/10/2018
6 B2
24.5
770
<0.05
2.44
1.76
0.0081j
5.49
<1
21
<0.2
0.756
17
7
<1
0.532j
30
<1
<50
<1
0.346j
<1
<1
2130
<1
2.084j
765
MW-08BR
Bedrock
07/30/2018
3.293j
24.1
628
<0.05
2.47
1.32
0.023
5.22
<1
20.3 B2
<0.2
0.639
16
2.055j
0.551j
<1
27
<1
<50
<1
<1
<1
<1
177
<1
1.704j
422
MW-08BR
Bedrock
11/15/2018
2.344j
23.4
741
<0.05
2.24
0.8j
<0.01
5.1
<1
20.3
<0.2
0.346
4.204j
2.414j
<1
<1
24
<1
<50
<1
<1
<1
<1
459
<1
2.722j
232
MW-09BR
Bedrock
02/01/2018
<5
16.6
124
<0.05
1.22
1.53
0.03
2.28
<1
20.9
<0.2
4.21
12
<5
<1
<1
23
<1
<50
<1
<1
1.04
<1
80
<1
<5
118
MW-09BR
Bedrock
04/10/2018
3.998 j,B2
16
112
<0.05
0.807j
1
0.016
2.12
<1
16.6
<0.2
4.79
16
2.152j
<1
<1
23
<1
<50
<1
<1
0.873j
<1
39
<1
<5
105
MW-09BR
Bedrock
07/30/2018
2.017j
17.7
131
<0.05
0.547j
1.2
0.019
2.07
<1
16.8 B2
<0.2
6
7
<5
<1
<1
27
<1
<50
<1
<1
1.23
<1
61
<1
<5
125
MW-09BR
Bedrock
11/14/2018
<5
18.7
139
0.034j
0.499j
0.533j
0.0051j
1.98
<1
16.8
<0.2
5.86
<5
2.569j
<1
<1
29
<1
<50
<1
<1
1.44
<1
205
<1
2.168j
154
MW-10BR
Bedrock
01/24/2018
6
17.6
239
<0.05
12
<1
0.254
6.64
<1
37.4 B1
<0.2
2.89
<5
5
<1
<1
121
<1
<50
<1
<1
14.5
<1
16
<1
7
244
MW-10BR
Bedrock
04/10/2018
9 B2
18.1
246
<0.05
11.5
<1
0.238
6.86
<1
36.8
<0.2
2.82
<5
2.207j
<1
<1
123
<1
<50
<1
<1
16.2
<1
5.806j
<1
4.062j
221
MW-10BR
Bedrock
07/30/2018
4.475j
17.9
191
<0.05
10.8
0.34j
0.257
6.5
<1
36.9 B2
<0.2
2.78
<5
2.221j
<1
<1
117
<1
<50
<1
0.727j
14.7
<1
16
<1
3.261j
172
MW-10BR
Bedrock
11/14/2018
5
18.3 B2
135
0.026j
10.4
<1
0.273
6.35
0.364j
35.9
<0.2
3.03
<5
1.86j
<1
<1
110
<1
<50
<1
<1
10
0.468j
4.854j
<1
6
136
MW-11BR
Bedrock
O1/23/2018
8
29.1
62
<0.05
3.87
2.12
0.246
6.78
<1
17.9
<0.2
4.83
<5
<5
<1
<1
167
<1
<50
<1
<1
<1
<1
<10
<1
<5
75
MW-11BR
Bedrock
04/11/2018
6
32
46
<0.05
3.34
2.69
0.517
6.5
<1
19.5
<0.2
5.14
<5
2.073j
<1
<1
198
<1
<50
<1
<1
<1
0.394j
3.783j
<1
4.386j
51
MW-11BR
Bedrock
07/27/2018
13
30.4
23
<0.05
4.35
1.8
0.484
7.39
<1
20
<0.2
4.68
2.754j
<5
<1
<1
177
<1
<50
<1
<1
<1
0.334j
<10
<1
11
25
MW-11BR
Bedrock
11/15/2018
2.515j
33.1
33
<0.05
0.781j
2.92
0.536
6.18
<1
20.8
<0.2
5.25
<5
2.065j
<1
<1
187
<1
<50
<1
<1
<1
0.904j
<10
<1
3.048j
38
MW-1113
Transition Zone
01/23/2018
<5
24.2
1390
<0.05
2.24
2.42
0.194
3.7
<1
29
<0.2
2.67
<5
<5
<1
<1
167
<1
<50
<1
<1
4.7
<1
156
<1
<5
1310
MW-1113
Transition Zone
04/11/2018
1.993 j
23.3
1170
<0.05
1.76
2.47
0.23
3.4
<1
28.3
<0.2
2.54
<5
1.791 j
<1
<1
177
<1
<50
<1
<1
4.69
1.58
72
<1
2.285 j
1180
MW-1113
Transition Zone
07/27/2018
1.887j
23.9
1230
<0.05
1.41
2.74
0.241
3.49
<1
29.7
<0.2
3.49
2.146j
<5
<1
<1
182
<1
<50
<1
<1
6.2
1.83
34
<1
1.933j
1270
MW-1113
Transition Zone
11/15/2018
<5
23
1390
<0.05
1.24
2.61
0.165
3.35
<1
29
<0.2
3.36
<5
<5
<1
<1
175
<1
<50
<1
<1
6.81
1.89
38
<1
<5
1390
MW-12BR
Bedrock
01/31/2018
5
20
1240
<0.05
5.62
<1
<0.01
5.84
<1
27.2
<0.2
<0.3
<5
6
<1
<1
44
<1
<50
<1
<1
2.61
<1
2370
<1
<5
1150
MW-12BR
Bedrock
04/10/2018
4.915 j,B2
20.8
1230
<0.05
5.73
<1
0.0069 j,112
5.99
<1
27.5
0.142j
0.336
<5
6
<1
0.532j
44
<1
<50
<1
<1
3.81
<1
2680
<1
2.819j
1160
MW-12BR
Bedrock
07/31/2018
2.756j
21.7
1270
<0.05
5.61
0.646j
0.0054j
5.86
<1
27.9
<0.2
0.409 B2
10
5
<1
0.436j
42
<1
<50
<1
<1
8.86
<1
2380
<1
3.658j
1120
MW-12BR
Bedrock
11/14/2018
3.478j
19.4
1200
0.023j
6.69
<1
<0.01
5.56
<1
26.9
<0.2
0.242j
<5
4.873j
<1
0.49j
42
<1
<50
<1
<1
12.3
<1
2480
<1
5
1150
MW-13BR
Bedrock
01/23/2018
17
19.2
147
<0.05
1.47
2.15
0.288
4.03
<1
37.1
<0.2
6.58
18
<5
<1
<1
371
<1
<50
<1
<1
1.85
<1
123
<1
10
125
MW-13BR
Bedrock
04/10/2018
13 B2
22.2
160
<0.05
2.35
2.4
0.28
4.53
0.346j
36.6
<0.2
6.25
3.03j
7
<1
<1
374
<1
<50
<1
<1
2.02
<1
75
<1
8
125
MW-13BR
Bedrock
07/27/2018
10
20.9
155
<0.05
3.12
2.08
0.268
4.65
<1
37.3
<0.2
5.39
4.954j
1.943j
<1
<1
377
<1
<50
<1
<1
1.88
<1
54
<1
9
112
MW-13BR
Bedrock
11/14/2018
11
21.8 B2
141
0.027j
1.15
1.38
0.277
4.42
<1
37.2
<0.2
6.77
2.011j
1.866j
<1
<1
362
<1
<50
<1
<1
1.62
0.589j
34
<1
11
96
Page 11 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
OTHER PARAMETERS
Mercury
(0.45u)
<0.05
Molybdenum
(0.45u)
<1
Nickel
(0.45u)
3.65
Phosphorus
(0.45u)
0.055
Selenium
(0.45u)
<1
Silver
(0.45u)
NA
Strontium
(0.45u)
2210
Thallium
(0.45u)
<0.2
Vanadium
(0.45u)
4.96
Zinc
(0.45u)
25
Radium-226
1.04
Radium-228
0.381 U
Total
Radium
1.421
Uranium-238
NA
Total
Uranium
0.00521
Carbonate
Alkalinity
<5
Fluoride
<1
Hardness
NA
Phosphorus
0.064
MW-02
Saprolite
01/24/2018
MW-02
Saprolite
04/10/2018
<0.05
0.779j
3.63
0.057
<1
NA
2140
<0.2
4.41
3.02j
0.0857 U
0.363 U
0.4487
NA
0.00449
<5
0.404j
NA
0.052
MW-02
Saprolite
07/26/2018
<0.05
0.624j
3.66
0.051
<1
NA
2460
<0.2
4.4
5
0.878
0.292 U
1.17
NA
0.00325
<5
<2
NA
0.056
MW-02
Saprolite
11/15/2018
<0.05
0.811j
6.05
0.071
<1
NA
2600
<0.2
4.96
<5
0.12 U
0.0138 U
0.1338
0.00403
0.00403
<5
<2
NA
0.06
MW-02BR
Bedrock
02/01/2018
<0.05
2.51
<1
<0.05
<1
NA
511
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.21
NA
0.083
MW-02BR
Bedrock
04/10/2018
<0.05
1.56
0.871j
0.062
<1
NA
547
<0.2
0. 122j
2.049j
NA
NA
NA
NA
NA
<5
0. 186j
NA
<0.05
MW-02BR
Bedrock
07/31/2018
<0.05
1.14
0.58j
0.092
<1
NA
541
<0.2
0.14j
1.71j
NA
NA
NA
NA
NA
<5
0.1356j
NA
0.1
MW-02BR
Bedrock
11/16/2018
0.017j
2.25
0.704j
<0.05
<1
NA
506
<0.2
<0.3
4.177j
NA
NA
NA
NA
NA
<5
0.1028j
NA
0.056
MW-03BR
Bedrock
01/31/2018
<0.05
<1
1.51
<0.05
1.64
NA
1450
<0.2
12.9
<5
0.671
0.0105 U
0.6815
NA
0.04
<5
<5
NA
0.093
MW-03BR
Bedrock
04/12/2018
<0.05
0.257j
1.28
<0.05
2.34
NA
1580
<0.2
13.6
<5
2.07
-0.0205 U
2.0495
NA
0.0417
<5
<2
NA
<0.05
MW-03BR
Bedrock
07/27/2018
<0.05
0.241j
1.19
<0.05
2.84
NA
1650
0. 104 j,B2
16.2
3.319j
0.48
-0.0637 U
0.4163
NA
0.0345
<5
<5
NA
<0.05
MW-03BR
Bedrock
11/15/2018
<0.05
0. 174j
1.06
<0.05
2.21
NA
1590
<0.2
16.5
<5
0.167 U
0.453 U
0.62
0.0403
0.0403
<5
<2
NA
<0.05
MW-04BR
Bedrock
01/30/2018
<0.05
6.46
<1
<0.05
<1
NA
264
<0.2
0.424
<5
NA
NA
NA
NA
NA
<5
0.17
NA
<0.05
MW-04BR
Bedrock
04/10/2018
<0.05
5.5
0.447j
<0.05
<1
NA
219
<0.2
0.774
3.548j
NA
NA
NA
NA
NA
<5
0.22
NA
<0.05
MW-04BR
Bedrock
07/25/2018
<0.05
5.58
0.61j
<0.05
<1
NA
257
0.128j
0.585
9
NA
NA
NA
NA
NA
<5
0.17
NA
<0.05
MW-04BR
Bedrock
11/15/2018
0.023
5.5
0.395 j
<0.05
<1
NA
261
<0.2
0.633
2.935 j
NA
NA
NA
NA
NA
<5
0.11
NA
<0.05
MW-05BR
Bedrock
01/31/2018
<0.05
2.27
<1
<0.05
<1
NA
310
<0.2
1
<5
0.0784 U
1.61
1.6884
NA
0.00749
<5
<0.5
NA
<0.05
MW-05BR
Bedrock
04/11/2018
<0.05
1.96
0.441j
<0.05
<1
NA
305
<0.2
0.657
16
0.357 U
1.01
1.367
NA
0.00657
<5
<0.5
NA
<0.05
MW-05BR
Bedrock
07/26/2018
<0.05
1.84
<1
<0.05
<1
NA
308
<0.2
0.442
<5
0.793
0.629
1.422
NA
0.00452
<5
0.2595j
NA
<0.05
MW-05BR
Bedrock
11/14/2018
<0.05
1.71
<1
<0.05
<1
NA
290
<0.2
0.451
2.252j
0.182 U
1.62 B
1.802
0.00275
0.00275
<5
<0.5
NA
<0.05
MW-05D
Transition Zone
01/31/2018
<0.05
4.38
<1
0.073
<1
NA
397
<0.2
14.3
<5
0.0813 U
0.123 U
0.2043
NA
0.000272
<5
<1
NA
0.076
MW-05D
Transition Zone
04/11/2018
<0.05
4.23
0.761j
0.1
0.493j
NA
378
<0.2
12.5
2.755j
0.327 U
0.0181 U
0.3451
NA
0.000252
<5
0.55j
NA
0.064
MW-05D
Transition Zone
07/27/2018
<0.05
4.11
0.865j
0.071
0.363j
NA
418
0.36 B2
13.7
10
0.195 U
0.0308 U
0.2258
NA
0.000237
<5
0.469j
NA
0.073
MW-05D
Transition Zone
11/15/2018
<0.05
4.54
0.742j
0.09
0.499j
NA
405
0.091j
17
3.012j
0.292
0.266 U
0.558
0.000286
0.000286
<5
<1
NA
0.09
MW-06BR
Bedrock
01/31/2018
<0.05
2.37
<1
<0.05 M1
<1
NA
165
<0.2
<0.3
<5
0 U
0.35 U
0.35
NA
0.0000921 j
<5
0.16
NA
<0.05
MW-06D
Transition Zone
01/31/2018
<0.05
<1
<1
<0.05
<1
NA
177
<0.2
6.42
<5
0.288 U
-0.0104 U
0.2776
NA
0.000315
<5
0.21
NA
<0.05
MW-07BR
Bedrock
01/31/2018
<0.05
1.27
<1
<0.05
<1
NA
125
<0.2
7.01
<5
NA
NA
NA
NA
NA
<5
0.21
NA
<0.05
MW-07BR
Bedrock
04/09/2018
<0.05
1.24
<1
<0.05
0.881 j
NA
108
<0.2
13.1
6
NA
NA
NA
NA
NA
<5
0.19
NA
<0.05
MW-07BR
Bedrock
07/27/2018
<0.05
1.06
<1
0.059
0.862j
NA
96
0. 184 j,B2
17
10
NA
NA
NA
NA
NA
<5
0.2
NA
0.061
MW-07BR
Bedrock
11/13/2018
<0.05
1.2
<1
0.091
0.758j
NA
92
<0.2
18.7
4.87j
NA
NA
NA
NA
NA
<5
0.24
NA
0.091
MW-08BR
Bedrock
01/31/2018
<0.05
2.84
4.09
<0.05
<1
NA
203
<0.2
0.495
14
NA
NA
NA
NA
NA
<5
0.25
NA
0.066
MW-08BR
Bedrock
04/10/2018
<0.05
2.03
0.801j
0.053
<1
NA
205
<0.2
0.219j
9
NA
NA
NA
NA
NA
<5
0.26
NA
0.094
MW-08BR
Bedrock
07/30/2018
<0.05
2.46
0.974j
<0.05
<1
NA
202
<0.2
0.4
11
NA
NA
NA
NA
NA
<5
0.22
NA
<0.05
MW-08BR
Bedrock
11/15/2018
<0.05
1.98
<1
<0.05
<1
NA
204
<0.2
0.479
3.287j
NA
NA
NA
NA
NA
<5
0.2
NA
<0.05
MW-09BR
Bedrock
02/01/2018
<0.05
1.27
1.14
<0.05
<1
NA
180
<0.2
4.05
13
-0.0332 U
0.0311 U
-0.0021
NA
0.000318
<5
0.17
NA
<0.05
MW-09BR
Bedrock
04/10/2018
<0.05
0.743j
0.815j
<0.05
<1
NA
185
<0.2
4.09
18
0.285 U
0.326 U
0.611
NA
0.000327
<5
0.16
NA
<0.05
MW-09BR
Bedrock
07/30/2018
0.02j
0.704j
1.13
<0.05
<1
NA
219
<0.2
5.75
2.123j
0.042 U
0.297 U
0.339
NA
0.000193j
<5
0.13
NA
<0.05
MW-09BR
Bedrock
11/14/2018
<0.05
0. 597j
0.69j
0.051
<1
NA
228
<0.2
5.54
1.813j
0.222 U
0.616 B
0.838
0.00019j
0.00019j
<5
0.11
NA
<0.05
MW-10BR
Bedrock
01/24/2018
<0.05
11.8
<1
0.21
<1
NA
168
<0.2
2.81
<5
0.245 U
0. 116 U
0.361
NA
0.00297
<5
0.39
NA
<0.05
MW-10BR
Bedrock
04/10/2018
<0.05
10.9
0.361j
<0.05
<1
NA
168
<0.2
2.68
<5
1.16
0.187 U
1.347
NA
0.00278
<5
0.39
NA
<0.05
MW-10BR
Bedrock
07/30/2018
<0.05
11.3
0.361j
<0.05
0.361j
NA
170
<0.2
2.76
<5
0.612
0.197 U
0.809
NA
0.00261
<5
0.35
NA
<0.05
MW-10BR
Bedrock
11/14/2018
<0.05
10.2
<1
0.055
<1
NA
161
<0.2
3.07
1.747j
0.317 U
0.704 B
1.021
0.00238
0.00238
<5
0.32
NA
<0.05
MW-11BR
Bedrock
01/23/2018
<0.05
2.32
2.53
<0.05
<1
NA
160
<0.2
4.87
<5
1.81
1.07
2.88
NA
0.00061
<5
<0.1
NA
<0.05
MW-11BR
Bedrock
04/11/2018
<0.05
2.59
3.32
<0.05
<1
NA
195
<0.2
5.46
2.132j
0.688
0.744
1.432
NA
0.000764
<5
0.069j
NA
<0.05
MW-11BR
Bedrock
07/27/2018
<0.05
3.46
2.11
<0.05
<1
NA
183
<0.2
4.46
2.097 j
0.0235 U
-0.19 U
-0.1665
NA
0.000586
<5
0.1
NA
<0.05
MW-11BR
Bedrock
11/15/2018
<0.05
0.757j
3.11
<0.05
<1
NA
188
<0.2
5.72
<5
0.165 U
0.669 B
0.834
0.000683
0.000683
<5
<0.1
NA
<0.05
MW-11D
Transition Zone
01/23/2018
<0.05
2.12
2.25
<0.05
<1
NA
313
<0.2
2.11
<5
2.74
0.19 U
2.93
NA
0.000178 j
<5
0.11
NA
<0.05
MW-11D
Transition Zone
04/11/2018
<0.05
1.71
2.59
<0.05
<1
NA
322
<0.2
2.54
1.864j
0.308 U
-0.15 U
0.158
NA
0.000133
<5
0.14
NA
<0.05 M1,R1
MW-11D
Transition Zone
07/27/2018
<0.05
1.38
2.55
<0.05
<1
NA
328
0.081 j,B2
2.86
<5
0.286 U
0.454
0.74
NA
0.000104j
<5
0.11
NA
<0.05 M1
MW-11D
Transition Zone
11/15/2018
<0.05
1.19
2.29
<0.05
<1
NA
316
<0.2
3.25
<5
0.366
-0.0859 U
0.2801
0.0000853j
0.0000853j
<5
0.061j
NA
<0.05
MW-12BR
Bedrock
01/31/2018
<0.05
4.3
<1
<0.05
<1
NA
229
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.19
NA
<0.05
MW-12BR
Bedrock
04/10/2018
<0.05
4.27
<1
<0.05
<1
NA
236
<0.2
0. 109j
<5
NA
NA
NA
NA
NA
<5
0.19
NA
<0.05
MW-12BR
Bedrock
07/31/2018
<0.05
3.89
<1
<0.05
<1
NA
234
0.139j
0.115j
<5
NA
NA
NA
NA
NA
<5
0.15
NA
<0.05
MW-12BR
Bedrock
11/14/2018
<0.05
4.22
<1
<0.05
<1
NA
229
<0.2
0.228j
<5
NA
NA
NA
NA
NA
<5
0.14
NA
<0.05
MW-13BR
Bedrock
01/23/2018
<0.05
1.25
1.74
0.19
<1
NA
404
<0.2
6.5
<5
4.96
-0.0588 U
4.9012
NA
0.0000864j
<5
<0.1
NA
0.19
MW-13BR
Bedrock
04/10/2018
<0.05
1.49
1.82
0.19
<1
NA
390
0.137j
6.33
5
0.153 U
0.228 U
0.381
NA
0.0000699j
<5
0.1768j
NA
0.17
MW-13BR
Bedrock
07/27/2018
<0.05
1.7
1.77
0.18
<1
NA
405
<0.2
6.42
3.79j
0.524
0.456
0.98
NA
0.000993
<5
0.1208j
NA
0.17
MW-13BR
Bedrock
11/14/2018
<0.05
0.723j
0.888j
0.22
<1
NA
408
<0.2
6.99
3.205j
0.31 U
0.204 U
0.514
0.0000832j
0.0000832j
<5
0.1066j
NA
0.19
Page 12 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
PH
7.3
Water
Level
50.25
Temp
12
Spec
Cond
632
DO
0.46
ORP
-88
Eh
117
Turbidity
6.8
Alkalinitycarbonate
270
Bi-
Alkalinity
270
Sulfide
<0.1 R1
Total
Organic
Carbon
IA Sl
Total
Suspended
Solids
<5
Boron
<50
Calcium
66.9
Chloride
42
Strontium
175
Sulfate
13
Total
Dissolved
Solids
370
Aluminum
57
Antimony
<1
Arsenic
<1
Barium
31
Beryllium
<1
Cadmium
<1
Chromium
(VI)
<0.025
Chromium
<1
Cobalt
2.25
Copper
<1
Iron
1320
Lead
<1
MW-14BR
Bedrock
01/29/2018
MW-14BR
Bedrock
04/11/2018
7.1
50.97
15
637
0.31
-48
157
4.5
307
307
<0.1
1 SS
<5
<50
68.4
43
168
13
350
23
<1
0.334j
34
<1
<1
<0.025
0.799j
2.58
0.415j
1320
<1
MW-14BR
Bedrock
07/25/2018
7.3
50.27
19
638
1.83
-74
131
3.8
264
264
<0.1
1.2 S1
6
<50
65.5
47
183
13
360
33
0.373j
0.479j
35
<1
<1
<0.025
0.895j
4.22
0.631j
1730
<1
MW-14BR
Bedrock
11/13/2018
7.2
48.85
15
644
0.30
-62
143
2.1
244
244
<0.1
1.1
<5
<50
64.1
52
197
13
340
6
<1
0.503j
36
<1
<1
<0.025
<1
2.68
0.377j
1640
<1
MW-15BR
Bedrock
01/24/2018
7.1
12.45
13
538
0.37
-77
128
1.7
236
236
1 <0.1
0.868 S1
<5
<50
64.1
41
133
32
390
42
<1
<1
16
<1
<1
0.038
<1
<1
<1
667
<1
MW-15BR
Bedrock
04/10/2018
7.6
9.31
15
551
0.54
93
298
1.6
220
220
<0.1
0.737 S1
<5
<50
63.9
43
138
33
350
41
<1
0.403j
18
<1
<1
<0.025 M1
0.537j
<1
0.358j
657
<1
MW-15BR
Bedrock
07/30/2018
7.5
9.27
31
559
0.93
102
307
2.0
239 M1
239
<0.1
0.818 S1
6
<50
61.9
41
121
32
380
82
<1
<1
16
<1
<1
0.091
0.365j
<1
<1
575
<1
MW-15BR
Bedrock
11/14/2018
7.5
1 6.23
14
546
0.40
-137
68
2.1
210
210
<0.1
0.75 SI
<5
<50
65.3
42
1 126
33
1 320
58
<1
<1
1 17
<1
<1
0.039
0.632 j,B2
<1
I <1
598
<1
MW-15D
Transition Zone
01/24/2018
6.7
11.59
13
660
5.03
33
238
0.6
236
236
<0.1
1.1 S1
<5
<50
67.2
46
244
30
400
9
<1
<1
6
<1
<1
2.6
2.77
<1
<1
12
<1
MW-15D
Transition Zone
04/10/2018
6.5
8.21
15
636
2.40
125
330
0.8
262
262
<0.1
0.995 S1
<5
<50
66.2
47
229
30
420
79
<1
<1
6
<1
<1
2.4
2.7
<1
0.493j
86
<1
MW-15D
Transition Zone
07/30/2018
6.3
8.51
26
651
2.44
304
509
0.9
235
235
<0.1
0.983 SI
<5
<50
61.6
40
221
27
420
18
<1
<1
5
<1
<1
3.1
2.59
<1
<1
25 SI
<1
MW-15D
Transition Zone
11/14/2018
6.5
5.02
14
615
1.38
67
272
1.5
223
223
<0.1
1 SS
<5
<50
63.3
43
232
27
390
13
<1
<1
6
<1
<1
2.9
2.72 B2
<1
<1
18
<1
MW-16BR
Bedrock
01/23/2018
6.9
33.17
17
510
0.22
-68
137
0.6
238
238
<0.1
0.786 S1
<5
<50
51.7
10
165
26
280
<5 B3
<1
<1
70
<1
<1
0.13
<1
<1
<1
152
<1
MW-16BR
Bedrock
04/10/2018
6.8
31.92
16
485
0.36
-16
189
0.9
240
240
<0.1
0.5 S1
<5
<50
50.6
11
161
26
300
3.633j
<1
<1
66
<1
<1
0.07
<1
<1
0.481j
18
<1
MW-16BR
Bedrock
07/27/2018
6.9
31.00
18
472
0.48
-44
161
0.8
238
238
<0.1
0.518 S1
<5
<50
53
9.2
167
22
260
6
<1
<1
66
<1
<1
0.076
<1
<1
0.344j
20
<1
MW-16BR
Bedrock
11/14/2018
6.9
29.39
15
461
0.59
69
274
3.2
208
208
<0.1
0.541 SI
<5
<50
47.8
10
151
23
280
3.109j
<1
<1
60
<1
<1
0.13
<1
<1
0.393j
8.511001j
<1
MW-17BR
Bedrock
01/23/2018
7.3
38.24
18
641
0.86
65
270
0.9
319
319
<0.1
0.719 SI
<5
50
90.5
12
859
38
380
<5 B3
<1
<1
92
<1
<1
0.061
<1
<1
<1
228
<1
MW-17BR
Bedrock
04/11/2018
7.2
37.39
13
616
0.75
-40
165
0.6
323
323
<0.1
0.675 SI
<5
<50
90.4
12
922
37
360
3.956j
<1
0.346j
99
<1
<1
<0.025
<1
<1
<1
351
<1
MW-17BR
Bedrock
07/26/2018
7.2
37.65
19
628
0.89
-14
191
1.4
320
320
<0.1
0.777
<5
<50
89.8 M4
13
912
37
370
5
<1
<1
97
<1
<1
<0.025
<1
<1
<1
1820 M2
<1
MW-17BR
Bedrock
11/13/2018
7.2
36.21
15
616
0.35
15
220
1.8
281
281
<0.1
0.596
<5
<50
85.6
13
855
36
360
2.626j
<1
0.365j
91
<1
<1
0.029
<1
<1
<1
244
<1
MW-18BR
Bedrock
01/24/2018
7.9
48.00
14
786
0.14
-180
25
0.5
193
193
<0.1
2.9 S1
<5
<50
93.1
140
369
8
500
5
<1
<1
62
<1
<1
<0.025
<1
<1
<1
1380
<1
MW-18BR
Bedrock
04/10/2018
7.9
48.35
14
796
0.17
-175
30
2.7
196
196
<0.1
2.3 S1
5
<50
97.9
150
438
8.8
580
14
<1
<1
83
<1
<1
<0.025
<1
0.599j
<1
1720
<1
MW-18BR
Bedrock
07/30/2018
7.9
48.09
17
796
0.03
-102
103
7.1
197
197
<0.1
1.9
9
<50
98.2
130
453
12
530
43
<1
<1
88
<1
<1
<0.025
<1
1.62
<1
1270
<1
MW-18BR
Bedrock
11/14/2018
8.1
46.60
14
810
0.36
-189
16
3.5
185
185
<0.1
1.8
<5
<50
93.7
130
615
16
500
13
<1
0.4j
99
<1
<1
<0.025
1.43 B2
1.6
<1
822
<1
MW-18D
Transition Zone
01/24/2018
6.7
47.56
14
1023
1.17
-37
168
1.3
185
185
<0.1
1.5 S1
<5
<50
93.9
180
664
32
630
10
<1
<1
23
<1
<1
6.7
7.31
<1
<1
98
<1
MW-18D
Transition Zone
04/10/2018
7.1
48.05
14
952
1.72
-55
150
0.7
211
211
<0.1
1.5 S1
<5
<50
103
180
732
32
710
9
<1
<1
42
<1
<1
11.8
12.3
<1
0.559j
54
<1
MW-18D
Transition Zone
07/30/2018
7.1
47.75
18
969
1.80
77
282
2.5
213
213
<0.1
1.7
<5
<50
94.2
150
579
33
590
27
<1
0.354j
31
<1
<1
2.8
3.51
<1
0.447j
165 SI
<1
MW-18D
Transition Zone
11/14/2018
6.8
46.70
13
918
0.68
-46
159
1.3
149
149
0.22
1.4 S1
<5
<50
82.9
170
782
29
570
9
<1
<1
46
<1
<1
12.1
12.7
<1
0.528j
180
<1
MW-19BRL
Bedrock
01/30/2018
7.1
39.76
15
787
0.30
-120
85
2.6
310
310
0.29
2 SI
11
<50
106
80
256
14
470
26
<1
2.45
58
<1
<1
<0.025
<1
<1
<1
4160
<1
MW-19BRL
Bedrock
04/10/2018
7.0
38.48
16
801
0.07
-131
74
3.6
336
336
0.18
1.8 S1
11
<50
112
83
251
11
480
36
<1
2.28
56
<1
<1
<0.025
<1
<1
<1
3770
<1
MW-19BRL
Bedrock
07/27/2018
7.0
38.35
17
786
0.39
-95
110
1.5
308
308
<0.1
1.7
11
<50
102
77
250
17
430
21
<1
2.18
49
<1
<1
<0.025
<1
<1
<1
3820
<1
MW-19BRL
Bedrock
11/14/2018
7.1
36.33
15
794
0.14
-81
124
4.9
283
283
0.15
1.8
10
<50
107
73
246
23
470
12
<1
2.12
52
<1
<1
<0.025
<1
<1
<1
3610
<1
MW-20BRL
Bedrock
01/29/2018
7.6
Artesian
15
376
1.50
-5
200
0.7
168
168
<0.1
0.525 SI
<5
<50
54.5
13
189
11
250
34
<1
<1
<5
<1
<1
<0.025
<1
<1
<1
85
<1
MW-20BRL
Bedrock
04/11/2018
7.2
Artesian
14
389
1.86
149
354
0.7
180
180
<0.1
0.488 SI
<5
<50
56
14
195
12
230
2.253 j
<1
<1
5
<1
<1
<0.025
<1
<1
<1
85
<1
MW-20BRL
Bedrock
07/26/2018
7.4
Artesian
17
396
4.65
1
206
1.0
183
183
<0.1
0.72
<5
<50
56.2
14
196
13
260
2.644j
<1
<1
5
<1
<1
<0.025
<1
<1
<1
92
<1
MW-20BRL
Bedrock
11/15/2018
7.7
Artesian
14
474
0.41
113
318
3.9
171
171
<0.1
0.65 S1
<5
<50
58.1
14
206
13
240
2.827j
<1
<1
5
<1
<1
<0.025
<1
<1
0.482j
67
<1
MW-21BRLR
Bedrock
09/06/2018
7.4
51.61
23
593
2.17
71
276
7.3
224
224
<0.1
1.5
<5
45.315j
66.3
28
387
40
360
66
<1
0.757j
17
<1
<1
0.03
<1
<1
0.46j
30
<1
MW-21BRLR
Bedrock
09/20/2018
7.2
47.80
19
611
1.90
99
304
9.8
232
232
<0.1
1.2 S1
<5
42.392j
65.6 B2
42
432
57
370
17
<1
0.924j
18
<1
<1
<0.025
<1
<1
0.408j
13
<1
MW-21BRLR
Bedrock
11/14/2018
7.4
47.70
13
825
0.43
6
211
8.5
208
208
<0.1
1.6 S1
<5
52
66
80
503
98
490
76
<1
1.72
27
<1
<1
<0.025
<1
<1
<1
66
<1
MW-22BR
Bedrock
02/01/2018
6.6
20.98
14
1282
0.56
42
247
1.5
240
240
<0.1
2.6 S1
<5
707
150
21
600
470
950
8
<1
<1
63
<1
<1
<0.025
<1
9.67
<1
25
<1
MW-22BR
Bedrock
04/11/2018
6.4
18.34
16
12
0.32
6
211
7.0
250
250
<0.1
2.5 S1
<5
753
154
19
595
670
930
9
<1
<1
68
<1
<1
<0.025
<1
5.61
1.01
144
<1
MW-22BR
Bedrock
07/26/2018
6.4
19.27
25
1332
0.64
164
369
1.1
247
247
<0.1
2.7
<5
805
157
20
605
490
990
16
<1
<1
72
<1
<1
<0.025
<1
7.37
0.981j
285
<1
MW-22BR
Bedrock
11/15/2018
6.6
14.04
11
1277
0.47
51
256
6.0
183
183
<0.1
2.7
<5
887
162
21
605
660
950
25
<1
<1
51
<1
<1
0.06
<1
5.12
1.08
89
<1
MW-22D
Transition Zone
02/01/2018
6.2
20.39
15
2190
0.24
72
277
0.5
143
143
<0.1
2.6 S1
<5
352
332
18
1690
1200
1900
9
<1
<1
39
<1
<1
<0.025
<1
11
<1
150
<1
MW-22D
Transition Zone
04/11/2018
6.2
18.02
17
2481
0.23
46
251
0.4
284
284
<0.1
3
<5
280
459
16
1740
1300
2000
4.719j
<1
<1
32
<1
<1
<0.025 P4,R0
<1
4.27
0.87j
3.617j
<1
MW-22D
Transition Zone
07/26/2018
6.0
18.58
20
2141
0.42
181
386
2.1
184
184
<0.1
2.7
<5
342
327
20
1570
1100
1800
8
<1
<1
37
<1
<1
<0.025
<1
5.92
0.93j
6.862j
<1
MW-22D
Transition Zone
11/15/2018
6.2
14.44
12
1350
0.27
80
285
4.1
139
139
<0.1
3.2
<5
641
172
16
939
620
1100
10
<1
<1
24
<1
<1
<0.025
<1
2.69
0.738j
11
<1
MW-23BRR
Bedrock
01/30/2018
6.9
17.51
12
421
0.47
-27
178
3.1
140
140
<0.1
2.4 S1
<5
<50
43.8
40
141
17
260
39
<1
<1
7
<1
<1
<0.025
<1
<1
<1
56
<1
MW-23BRR
Bedrock
04/11/2018
6.8
15.71
16
418
0.38
30
235
4.2
142
142
<0.1
2.4 S1
<5
<50
43.4
39
149
16
250
88
<1
0.833j
10
<1
<1
<0.025
0.518j
<1
<1
90
<1
MW-23BRR
Bedrock
07/26/2018
6.8
14.35
19
398
0.73
23
228
3.0
132
132
<0.1
2
<5
<50
41
38
134
15
270
39
<1
0.644j
9
<1
<1
<0.025
<1
<1
<1
63
<1
MW-23BRR
Bedrock
11/13/2018
6.9
10.10
16
399
0.23
35
240
2.7
121
121
<0.1
1.9
<5
<50
42.1
39
135
15
250
17
<1
0.517j
8
<1
<1
<0.025 M1
<1
<1
<1
42
0.924j
MW-24BR
Bedrock
01/30/2018
7.8
41.71
12
487
0.56
-128
77
9.7
157
157
0.86
1.4 S1
5
<50
48.8
25
1690
70
300
193
<1
4.92
58
<1
<1
<0.025
3.55
<1
1.71
588
<1
MW-24BR
Bedrock
04/11/2018
7.7
40.41
15
489
0.71
-154
51
8.7
157
157
0.19
1.3 S1
<5
34.752j
49
24
1690
66
270
118
0.458j
5.23
56
<1
<1
0.029
3.54
<1
0.375j
482
<1
MW-24BR
Bedrock
07/27/2018
7.8
40.95
21
471
1.69
-87
118
6.1
154
154
<0.1
1.3 S1
<5
36.453j
42.2
24
1640
65
260
83
2.46
4.39
57
<1
<1
<0.025
0.628j
<1
0.379j
367
<1
MW-24BR
Bedrock
11/14/2018
7.9
40.09
14
465
0.19
-220
-15
2.9
147
147
0.25
1.4 S1
<5
34.81j
44.7
25
1620
61
300
14
0.393j
4.93
58
<1
<1
0.094
<1
<1
<1
305
<1
MW-25BR
Bedrock
01/30/2018
7.1
49.07
12
977
0.45
-85
120
5.7
365
365
<0.1
2.7 S1
6
<50
132
66
1780
100
590
73
<1
3.5
69
<1
<1
<0.025
5.19
<1
<1
2250
<1
MW-25BR
Bedrock
04/11/2018
7.1
48.35
15
971
0.18
-99
106
9.2
359
359
<0.1
2.5 S1
6
21.343 j
129
65
1790
97
580
123
0.336 j
2.9
64
<1
<1
<0.025
2.63
0.573 j
0.386 j
2130
<1
MW-25BR
Bedrock
07/26/2018
7.1
48.11
19
971
0.67
-86
119
1.4
334
334
<0.1
2.5
5
20.94j
136
63
1700
94
570
38
<1
4.04
65
<1
<1
<0.025
<1
0.624j
<1
2400
<1
MW-25BR
Bedrock
11/13/2018
7.0
45.66
15
950
0.45
-43
162
2.7
312
312
<0.1
2.4
5
23.45j
132
66
1800
100
560
15
<1
1 2.54
65
<1
<1
<0.025
<1
0.529j
<1
2120
<1
Page 13 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Lithium
9
Magnesium
27.2
Manganese
314
Mercury
<0.05
Molybdenum
1.87
Nickel
1.21
Nitrate +
Nitrite
0.025
Potassium
6.66
Selenium
<1
Sodium
23.3
Thallium
<0.2
Vanadium
0.313
Zinc
16
Aluminum
(0.45u)
7
Antimony
(0.45u)
<1
Arsenic
(0.45u)
<1
Barium
(0.45u)
32
Beryllium
(0.45u)
<1
Boron
(0.45u)
<50
Cadmium
(0.45u)
<1
Chromium
(0.45u)
<1
Cobalt
(0.45u)
1.78
Copper
(0.45u)
<1
Iron
(0.45u)
974
Lead
(0.45u)
<1
Lithium
(0.45u)
<5
Manganese
(0.45u)
258
MW-14BR
Bedrock
01/29/2018
MW-14BR
Bedrock
04/11/2018
5
28.2
352
<0.05
1.74
1.15
0.013
6.37
<1
23.6
0.174j
0.251j
9
3.767j
<1
<1
32
<1
<50
<1
<1
1.96
<1
1020
<1
5
284
MW-14BR
Bedrock
07/25/2018
3.699j
28.5
397
<0.05
3.08
1.05
0.0035j
6.16
<1
23.4
<0.2
0.522 SI
6
4.474j
<1
<1
35
<1
<50
<1
<1
3.48
<1
1410
<1
6
359
MW-14BR
Bedrock
11/13/2018
3.154j
30
353
0.018j
4.04
<1
<0.01
6.38
<1
24.2
<0.2
0.133j
<5
48
<1
<1
35
<1
<50
<1
<1
2.71
<1
1400
<1
3.16j
339
MW-15BR
Bedrock
01/24/2018
21
14.9
33
<0.05
14.9
1.47
0.02
8.51
<1
31.4 B1
1 <0.2
0.45
<5
30
<1
<1
24
<1
<50
<1
<1
<1
<1
745
<1
32
62
MW-15BR
Bedrock
04/10/2018
10 B2
14.5
36
<0.05
15.1
0.631j
0.151
5.43
<1
32.3
0.088j
0.271j
<5
7
<1
0.38j
15
<1
<50
<1
<1
<1
<1
520
<1
5
33
MW-15BR
Bedrock
07/30/2018
8
14.2
38
<0.05
12.1
0.698j
0.013
6.14
<1
30.1 B2
<0.2
0.238j
<5
3.846j
<1
<1
16
<1
<50
<1
<1
<1
<1
604
<1
3.591j
43
MW-15BR
Bedrock
11/14/2018
16
15.2
41
0.025j
11.3
0.402j
0.033
7.74
<1
31.5
<0.2
0.282j
<5
8
<1
0.401j
14
<1
<50
<1
1 0.485j
<1
0.44j
442
1 <1
26
1 29
MW-15D
Transition Zone
01/24/2018
<5
27.8
<5
<0.05
<1
7.69
3.6
1.06
<1
29.2 B1
<0.2
9.78
<5
<5
<1
<1
6
<1
<50
<1
2.82
<1
<1
13
<1
<5
<5
MW-15D
Transition Zone
04/10/2018
<5
28.6
4.561 j
<0.05
1.78
7.91
3.8
1.06
<1
28.5
<0.2
9.84
3.252 j
<5
<1
0.476 j
6
<1
<50
<1
2.93
<1
0.466 j
<10
<1
1.67 j
<5
MW-15D
Transition Zone
07/30/2018
<5
27.3
<5
<0.05
0.173 j
6.6
4
0.99
<1
27.3 B2
<0.2
9.8
<5
<5
<1
<1
5
<1
<50
<1
2.8
<1
0.461 j
<10
<1
<5
<5
MW-15D
Transition Zone
11/14/2018
1.873 j
25.1
<5
0.024 j
0.147 j
6.03
3.7
0.964
<1
27.6
<0.2
10.4
3.497 j,B
<5
<1
<1
6
<1
<50
<1
2.66
<1
0.501 j
<10
<1
1.919 j
<5
MW-16BR
Bedrock
01/23/2018
<5
23.9
93
<0.05
1.2
1.45
0.064
3.9
<1
18.5
<0.2
2.72
<5
<5
<1
<1
65
<1
<50
<1
<1
<1
<1
137
<1
<5
97
MW-16BR
Bedrock
04/10/2018
9 B2
23.9
34
<0.05
1.06
0.73j
0.076 M2
3.79
<1
18.3
<0.2
3.01
<5
2.696j
<1
<1
59
<1
<50
<1
<1
<1
<1
15
<1
3.495j
42
MW-16BR
Bedrock
07/27/2018
4.472j
23.2
19
<0.05
0.815j
0.635j
0.075
3.84
<1
19.5
<0.2
3.05
3.457j
2.603j
<1
<1
61
<1
<50
<1
<1
<1
<1
14
<1
3.5j
27
MW-16BR
Bedrock
11/14/2018
4.724j
21.6 B2
9
0.024j
0.801j
0.374j
0.082
3.53
0.334j
17.8
0.091j
3.22
<5
2.888j
<1
<1
58
<1
<50
<1
<1
<1
0.674j
8.344j
<1
5
20
MW-17BR
Bedrock
01/23/2018
6
19.3
222
<0.05
3.72
<1
<0.01
4.31
<1
18
<0.2
0.427
<5
<5
<1
<1
97
<1
<50
<1
<1
<1
<1
258
<1
7
292
MW-17BR
Bedrock
04/11/2018
4.334j
20.6
288
<0.05
2.74
<1
0.0039j
4.05
<1
18
0.119j
0.268j
<5
2.966j
<1
<1
94
<1
<50
<1
<1
<1
<1
296
<1
5
320
MW-17BR
Bedrock
07/26/2018
4.297j
21.6
341
<0.05
2.24
<1
0.0036j
4.14
<1
18
0.082j
0.221j
<5
3.292j
<1
<1
98
<1
<50
<1
0.378j
<1
<1
156
<1
5
202
MW-17BR
Bedrock
11/13/2018
2.581j
19.7
181
0.022j
2.34
0.505j
<0.01
4.01
<1
17.5
<0.2
0.332
<5
2.042j
<1
<1
94
<1
<50
<1
<1
<1
<1
231
<1
3.401j
264
MW-18BR
Bedrock
01/24/2018
17
23.9
838
<0.05
4.06
<1
<0.01
8.06
<1
20 B1
<0.2
<0.3
<5
<5
<1
<1
60
<1
<50
<1
<1
<1
<1
1620
<1
12
856
MW-18BR
Bedrock
04/10/2018
14
24.1
782
<0.05
3.59
0.351j
<0.01
7.86
<1
19.4
0.153j
0. 12j
<5
5
<1
<1
81
<1
<50
<1
<1
0.498j
<1
1520
<1
20
710
MW-18BR
Bedrock
07/30/2018
16
24.5
833
<0.05
3.09
0.424j
<0.01
8.1
<1
19.2 B2
<0.2
0.233j
2.18j
3.451j
<1
0.368j
75
<1
<50
<1
<1
0.955j
<1
1190
<1
12
820
MW-18BR
Bedrock
11/14/2018
34
21.1
811
0.022j
4.86
0.463j
<0.01
12.8
<1
22.2
<0.2
0.344
17 B
5
<1
0.343j
90
<1
<50
<1
<1
1.73
<1
1060
<1
27
875
MW-18D
Transition Zone
01/24/2018
13
41.4
45
<0.05
3.32
<1
0.329
3.35
<1
28.9 B1
<0.2
1.7
<5
17
<1
<1
28
<1
<50
<1
6.09
<1
<1
135
<1
17
99
MW-18D
Transition Zone
04/10/2018
14
39.5
16
<0.05
4.94
0.751j
0.265
3.54
0.598j
31.8
0.112j
1.27
<5
4.99j
<1
<1
29
<1
<50
<1
7.18
<1
<1
72
<1
13
24
MW-18D
Transition Zone
07/30/2018
8
44.8
86
<0.05
1.71
2.35
0.263
2.96
0.338j
24.4 B2
<0.2
1.2
2.94j
3.187j
<1
<1
22
<1
<50
<1
2.78
<1
<1
131
<1
5
75
MW-18D
Transition Zone
11/14/2018
14
28 B2
93
0.024j
4.06
1.65
0.227
3.6
0.475j
35.1
<0.2
1.13
<5
3.949j
<1
<1
46
<1
<50
<1
9.44
<1
0.434j
70
<1
14
91
MW-19BRL
Bedrock
01/30/2018
7
20.7
1510
<0.05
2.32
<1
0.014
6.63
<1
34.6 B2„B3
<0.2
0.378
<5
8
<1
2.19
56
<1
<50
<1
<1
<1
<1
4350
<1
6
1480
MW-19BRL
Bedrock
04/10/2018
8 B2
22
1340
<0.05
2.31
0.457j
0.0097j
6.68
<1
31.2
0.106j
0.426
<5
8
<1
1.84
48
<1
<50
<1
<1
<1
<1
3890
<1
4.696j
1300
MW-19BRL
Bedrock
07/27/2018
6
21.3
1440
<0.05
3.9
<1
0.013
6.36
<1
31.5
<0.2
0.476
4.399j
6
<1
2.27
45
<1
<50
<1
<1
<1
<1
3780
<1
6
1360
MW-19BRL
Bedrock
11/14/2018
6
21.3 B2
1470
0.023j
2.64
<1
<0.01
6.18
<1
28.9
<0.2
0.324
<5
6
<1
2.29
47
<1
<50
<1
<1
<1
<1
3920
<1
7
1450
MW-20BRL
Bedrock
01/29/2018
9
7.1
391
<0.05
1.11
<1
<0.01
3.5
<1
15.2 B3
<0.2
<0.3
<5
<5
<1
<1
<5
<1
<50
<1
<1
<1
<1
79
<1
<5
367
MW-20BRL
Bedrock
04/11/2018
7
7.25
413
<0.05
1.1
<1
<0.01
3.45
<1
15.8
<0.2
0.141j
<5
<5
<1
<1
5
<1
<50
<1
<1
<1
<1
80
<1
6
370
MW-20BRL
Bedrock
07/26/2018
7
7.64
437
<0.05
1.03
<1
0.0039j
3.55
<1
15.2
0.126j
0.256j
<5
1.687j
<1
<1
6
<1
<50
<1
<1
<1
<1
91
<1
8
436
MW-20BRL
Bedrock
11/15/2018
6
7.3
406
<0.05
1.11
<1
<0.01
3.44
<1
15.5
<0.2
<0.3
5
<5
<1
<1
5
<1
<50
<1
<1
<1
0.448j
66
<1
6
410
MW-21BRLR
Bedrock
09/06/2018
13
10.9
97
<0.05
5.38
0.382j
0.0061j
6.89
<1
34.4 B2
<0.2
1.58
16
6
<1
0.891j
16
<1
43.336j
<1
<1
<1
<1
5.675j
<1
12
94
MW-21BRLR
Bedrock
09/20/2018
12
11.5
101
<0.05
8.92
0.359j
0.0041j
11.5
<1
45.9
<0.2
1.51
23
4.976j
<1
0.849j
17
<1
40.113j
<1
<1
<1
<1
4.596j
<1
10
88
MW-21BRLR
Bedrock
11/14/2018
12
12.5
129
0.029j
18.6
<1
<0.01
23.2
<1
71.2
<0.2
1.14
24 B
3.939j
<1
1.72
27
<1
53
<1
<1
<1
1.14
38
0.943j
13
135
MW-22BR
Bedrock
02/01/2018
8
67.7
1140
<0.05
7.84
2.68
0.248
9.15
4.33
49.5 B3
<0.2
0.808
<5
<5
<1
<1
65
<1
703
<1
<1
10
<1
<10
<1
7
1080
MW-22BR
Bedrock
04/11/2018
4.505j
66.4
479
<0.05
3.93
2.32
0.253
9.54
5.3
48.5
<0.2
0.732
<5
2.381j
<1
<1
64
<1
695
<1
<1
4.16
0.475j
51
<1
5
492
MW-22BR
Bedrock
07/26/2018
4.515 j
70.7
488
<0.05
3.3
2.17
0.222
10.1
6.2
50.3
0.098 j
0.859
<5
2.353 j
<1
<1
61
<1
728
<1
<1
4.14
0.411 j
128
<1
6
457
MW-22BR
Bedrock
11/15/2018
3.381j
69.4 B2
355
<0.05
2.46
1.62
0.654
8.97
11
49.8
<0.2
1.24
3.117j
2.008j
<1
<1
48
<1
845
<1
<1
2.43
0.961j
17
<1
3.755j
314
MW-22D
Transition Zone
02/01/2018
6
103
2670
<0.05
<1
2.63
<0.01
1.96
23.6
119 B3
<0.2
2.56
<5
<5
<1
<1
38
<1
353
<1
<1
10.8
<1
144
<1
6
2560
MW-22D
Transition Zone
04/11/2018
2.982 j
108
1080
<0.05
0.559 j
1.59
2
2.21
261
59.6
<0.2
4.83
<5
4.005 j
<1
<1
32
<1
298
<1
<1
4
0.798 j
<10
<1
4.305 j
1080
MW-22D
Transition Zone
07/26/2018
4.152j
98.2
1610
<0.05
0.389j
2.24
0.274
2.24
149
99
<0.2
4.02
2.01j
4.15j
<1
<1
37
<1
340
<1
<1
5.71
0.516j
3.395j
<1
5
1620
MW-22D
Transition Zone
11/15/2018
6
60.1 B2
1020
<0.05
0.291j
1.53
0.04
2.67
31.3
70.6
<0.2
4.71
1.959j
2.646j
<1
<1
24
<1
626
<1
<1
2.64
0.955j
4.843j
<1
6
1020
MW-23BRR
Bedrock
01/30/2018
15
5.83
29
<0.05
2.57
<1
0.123
2.34
<1
32.7 B2„B3
<0.2
0.953
<5
<5
<1
<1
7
<1
<50
<1
<1
<1
<1
46
<1
14
28
MW-23BRR
Bedrock
04/11/2018
14
5.64
36
<0.05
2.57
0.364j
0.039
2.22
<1
36
0.138j
0.927
<5
3.582j
<1
0.731j
9
<1
<50
<1
<1
<1
<1
53
<1
14
30
MW-23BRR
Bedrock
07/26/2018
12
5.75
29
<0.05
2.28
<1
0.162
2.23
<1
32
<0.2
1.1
7
3.213j
<1
0.468j
8
<1
<50
<1
<1
<1
<1
52
<1
15
26
MW-23BRR
Bedrock
11/13/2018
12
5.48
24
0.021j
2.16
<1
0.186
2.14
<1
30.7
<0.2
0.858
2.06j
2.521j
<1
0.401j
8
<1
<50
<1
<1
<1
<1
43
<1
12
24
MW-24BR
Bedrock
01/30/2018
7
8.56
139
<0.05
9.52
2.48
<0.01
5.31
<1
41.4 B2„B3
<0.2
0.371
8
18
<1
2.92
61
<1
<50
<1
<1
<1
<1
251
<1
8
99
MW-24BR
Bedrock
04/11/2018
2.071 j
8.37
149
<0.05
9.44
2.14
<0.01
4.26
<1
39.8
0.086 j
0.287 j
<5
6
0.368 j
3
59
<1
29.817 j
<1
<1
<1
<1
255
<1
4.106 j
104
MW-24BR
Bedrock
07/27/2018
15
8.12
105
<0.05
9.44
1.98
0.014
9.11
<1
42.2
<0.2
0.396
2.852j
5
0.55j
3.12
61
<1
26.977j
<1
<1
<1
<1
184
<1
3.455j
93
MW-24BR
Bedrock
11/14/2018
1.761j
8.14 B2
115
0.029j
10.5
<1
<0.01
3.65
<1
40.7
<0.2
0.246j
<5
5
<1
3.06
64
<1
29.719j
<1
<1
<1
<1
322
<1
2.504j
106
MW-25BR
Bedrock
01/30/2018
<5
24.3
592
<0.05
4.95
3.63
<0.01
7.03
<1
50.7 B2„B3
<0.2
0.345
<5
<5
<1
1.86
60
<1
<50
<1
<1
<1
<1
1580
<1
7
574
MW-25BR
Bedrock
04/11/2018
5
24.5
587
<0.05
3.66
1.76
<0.01
6.43
<1
44
0.083j
0.366
<5
3.959j
<1
1.55
54
<1
17.096j
<1
0.473j
0.426j
<1
1310
<1
7
549
MW-25BR
Bedrock
07/26/2018
4.642 j
27.6
583
<0.05
4.83
0.776 j
0.0055 j
6.82
<1
48.2
<0.2
0.285 j
<5
4.313 j
<1
1.98
56
<1
<50
<1
<1
0.46 j
<1
1570
<1
8
577
MW-25BR
Bedrock
11/13/2018
3.88j
23.6
569
<0.05
4.89
<1
<0.01
6.43
<1
45.5
<0.2
0. 18j
33
11
<1
1.48
54
<1
1 17.66j
<1
<1
0.416j
<1
1390
<1
5
531
Page 14 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
OTHER PARAMETERS
Mercury
(0.45u)
<0.05
Molybdenum
(0.45u)
1.64
Nickel
(0.45u)
<1
Phosphorus
(0.45u)
<0.05
Selenium
(0.45u)
<1
Silver
(0.45u)
NA
Strontium
(0.45u)
166
Thallium
(0.45u)
<0.2
Vanadium
(0.45u)
<0.3
Zinc
(0.45u)
7
Radium-226
0.907
Radium-228
0.237 U
Total
Radium
1.144
Uranium-238
NA
Total
Uranium
0.00023
Carbonate
Alkalinity
<5
Fluoride
0.23
Hardness
NA
Phosphorus
0.059
MW-14BR
Bedrock
01/29/2018
MW-14BR
Bedrock
04/11/2018
<0.05
1.8
0.635j
<0.05
<1
NA
174
<0.2
0. 133j
8
0.266
0.458
0.724
NA
0.000222
<5
0.16
NA
<0.05
MW-14BR
Bedrock
07/25/2018
<0.05
2.77
0.436 j
<0.05
<1
NA
176
<0.2
0. 181 j
4.05 j
0.429
0.959
1.388
NA
0.000328
<5
0.18
NA
0.062
MW-14BR
Bedrock
11/13/2018
<0.05
3.29
<1
0.053
<1
NA
187
<0.2
<0.3
2.273j
0.953
0.927
1.88
0.000296
0.000296
<5
0.15
NA
0.059
MW-15BR
Bedrock
01/24/2018
<0.05
10.4
<1
<0.05
<1
NA
147
<0.2
<0.3
24
0.181 U
0.519
0.7
NA
0.000909
<5
0.14
NA
<0.05
MW-15BR
Bedrock
04/10/2018
<0.05
13
0.615j
<0.05
<1
NA
135
0. 197j
0. 144j
<5
0.522
-0.0731 U
0.4489
NA
0.000691
<5
0.13
NA
<0.05
MW-15BR
Bedrock
07/30/2018
<0.05
6.28
0.354j
<0.05
<1
NA
152
<0.2
0.118j
<5
0.306 U
0.589
0.895
NA
0.000549
<5
0.0877j
NA
<0.05
MW-15BR
Bedrock
11/14/2018
<0.05
18.8
0.942j
<0.05
0.407j
NA
121
<0.2
0.386
1.847j
0.0806 U
0.538 U
0.6186
0.000611
0.000611
<5
0.0746j
NA
<0.05
MW-15D
Transition Zone
01/24/2018
<0.05
<1
7.68
<0.05
<1
NA
238
<0.2
9.89
<5
0.295 U
-0.202 U
0.093
NA
0.000808
<5
0.12
NA
<0.05
MW-15D
Transition Zone
04/10/2018
<0.05
2.85
7.97
<0.05
<1
NA
233
<0.2
9.95
<5
0.776
0.369 U
1.145
NA
0.00073
<5
0.1
NA
<0.05
MW-15D
Transition Zone
07/30/2018
<0.05
0. 175j
6.93
<0.05
<1
NA
224
<0.2
9.94
<5
0.375
0.318 U
0.693
NA
0.000628
<5
0.0695j
NA
<0.05
MW-15D
Transition Zone
11/14/2018
<0.05
0. 175j
6.58
<0.05
<1
NA
226
<0.2
10.3
2.663j
-0.198 U
0.479 U
0.281
0.000579
0.000579
<5
<0.1
NA
<0.05
MW-16BR
Bedrock
01/23/2018
<0.05
1.11
1.77
0.051
<1
NA
158
<0.2
2.63
<5
0.549
0.784
1.333
NA
0.00114
<5
0.14
NA
0.054
MW-16BR
Bedrock
04/10/2018
<0.05
0.832j
0.685j
<0.05
0.353j
NA
152
0. 132j
2.7
<5
1.36
0.176 U
1.536
NA
0.00125
<5
0.18
NA
<0.05
MW-16BR
Bedrock
07/27/2018
<0.05
0.826j
0.682j
<0.05
<1
NA
158
<0.2
2.86
1.678j
0.136 U
0.0889 U
0.2249
NA
0.00122
<5
0.14
NA
<0.05
MW-16BR
Bedrock
11/14/2018
<0.05
0.801j
1.67
0.052
<1
NA
148
<0.2
3
2.392j
0.924
0.29 U
1.214
0.00105
0.00105
<5
0.13
NA
<0.05
MW-17BR
Bedrock
01/23/2018
<0.05
2.99
<1
<0.05
<1
NA
890
<0.2
<0.3
<5
2.71
0.294 U
3.004
NA
0.000268
<5
0.12
NA
<0.05
MW-17BR
Bedrock
04/11/2018
<0.05
1.5
<1
<0.05
<1
NA
831
<0.2
0. 139j
<5
-0.087 U
0.373 U
0.286
NA
0.00028
<5
0.11
NA
<0.05
MW-17BR
Bedrock
07/26/2018
<0.05
3.24
<1
<0.05
<1
NA
919
<0.2
0.377
<5
0.0237 U
0.689
0.7127
NA
0.000275
<5
0.14
NA
<0.05 M1
MW-17BR
Bedrock
11/13/2018
0.019j
2.09
<1
<0.05
<1
NA
861
<0.2
0. 167j
<5
0.806
0.569
1.375
0.000201
0.000201
<5
0.11
NA
<0.05
MW-18BR
Bedrock
01/24/2018
<0.05
3.53
<1
<0.05
<1
NA
325
<0.2
<0.3
<5
1.66
0. 122 U
1.782
NA
0.000386
<5
<0.5
NA
<0.05
MW-18BR
Bedrock
04/10/2018
<0.05
3.99
0.413j
<0.05
<1
NA
440
<0.2
<0.3
<5
2.72 D6
0.601
3.321
NA
0.000346
<5
0.1985j
NA
<0.05
MW-18BR
Bedrock
07/30/2018
<0.05
2.77
<1
<0.05
<1
NA
380
<0.2
0. 116j
<5
6.17
0.525 U
6.695
NA
0.000409
<5
0.2525j
NA
<0.05
MW-18BR
Bedrock
11/14/2018
<0.05
3.64
<1
0.051
<1
NA
512
<0.2
0.298j
5
1.75
0 U
1.75
0.000686
0.000686
<5
<0.5
NA
<0.05
MW-18D
Transition Zone
01/24/2018
<0.05
2.87
<1
<0.05
<1
NA
649
<0.2
1.66
25
6.63
-0.0401 U
6.5899
NA
0.00362
<5
<0.5
NA
<0.05
MW-18D
Transition Zone
04/10/2018
<0.05
3.06
0.757j
0.051
0.371j
NA
649
<0.2
1.42
<5
0.595
0.408 U
1.003
NA
0.00319
<5
0.2805j
NA
<0.05
MW-18D
Transition Zone
07/30/2018
0.027j
1.37
1.73
0.052
<1
NA
515
<0.2
1.39
1.763j
0.749
0.407 U
1.156
NA
0.0027
<5
0.24j
NA
<0.05
MW-18D
Transition Zone
11/14/2018
<0.05
4.29
3.68
0.06
0.695j
NA
818
<0.2
1.35
<5
1.04
0.624 B
1.664
0.00264
0.00264
<5
0. 189j
NA
0.055
MW-19BRL
Bedrock
01/30/2018
<0.05
2.86
<1
0.27
<1
NA
254
<0.2
<0.3
<5
0.468
0.539
1.007
NA
0.0000707j
<5
<0.2
NA
0.26
MW-19BRL
Bedrock
04/10/2018
<0.05
2.8
<1
0.32
<1
NA
233
<0.2
0.214j
1.784j
-0.0383 U
0.827
0.7887
NA
0.0000688j
<5
0.19
NA
0.3
MW-19BRL
Bedrock
07/27/2018
<0.05
4.54
<1
0.36
<1
NA
244
<0.2
0. 192j
<5
0.68
0.598
1.278
NA
<0.0002
<5
0.1684j
NA
0.35
MW-19BRL
Bedrock
11/14/2018
<0.05
3.84
<1
0.31
<1
NA
240
<0.2
0.309
<5
0.388
0.494 U
0.882
0.000143j
0.000143j
<5
0.1434j
NA
0.3
MW-20BRL
Bedrock
01/29/2018
<0.05
1.14
<1
<0.05
<1
NA
183
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.18
NA
<0.05
MW-20BRL
Bedrock
04/11/2018
<0.05
1
<1
<0.05
<1
NA
196
<0.2
0.115j
<5
NA
NA
NA
NA
NA
<5
0.12
NA
<0.05
MW-20BRL
Bedrock
07/26/2018
<0.05
1.01
<1
<0.05
<1
NA
197
<0.2
0.15j
<5
NA
NA
NA
NA
NA
<5
0.13
NA
<0.05
MW-20BRL
Bedrock
11/15/2018
<0.05
1.1
<1
<0.05
<1
NA
205
<0.2
0.362
<5
NA
NA
NA
NA
NA
<5
0.073j
NA
<0.05
MW-21BRLR
Bedrock
09/06/2018
<0.05
5.93
<1
<0.05
<1
NA
381
0. 171j
1.6
14
0.563
0.267 U
0.83
0.00603
0.00603
<5
0.24
NA
<0.05
MW-21BRLR
Bedrock
09/20/2018
<0.0625
8.68
0.384j
<0.05
<1
NA
400
<0.2
1.6
20
0.31 U
0.0129 U
0.3229
0.00562
0.00562
<5
0.23
NA
<0.05
MW-21BRLR
Bedrock
11/14/2018
<0.05
18.5
<1
<0.05
<1
NA
503
<0.2
1.15
26
NA
NA
NA
NA
NA
<5
0.21
NA
<0.05
MW-22BR
Bedrock
02/01/2018
<0.05
6.51
2.84
<0.05
4.4
NA
557
<0.2
0.569
<5
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
MW-22BR
Bedrock
04/11/2018
<0.05
4.1
2.31
<0.05
5.4
NA
580
<0.2
0.622
3.368j
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
MW-22BR
Bedrock
07/26/2018
<0.05
3.77
2.29
<0.05
6.14
NA
577
<0.2
0.742
1.687j
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
MW-22BR
Bedrock
11/15/2018
0.064 j,D2
2.31
1.69
<0.05
10.6
NA
581
<0.2
0.846
2.218j
NA
NA
NA
NA
NA
<5
<1
NA
<0.05
MW-22D
Transition Zone
02/01/2018
<0.05
<1
2.58
0.074
22
NA
1640
<0.2
2.33
<5
NA
NA
NA
NA
NA
<5
<2
NA
0.073
MW-22D
Transition Zone
04/11/2018
<0.05
0.523j
1.79
0.059
260
NA
1800
<0.2
4.51
2.894j
NA
NA
NA
NA
NA
<5
<2
NA
0.064
MW-22D
Transition Zone
07/26/2018
<0.05
0.39j
2.27
0.07
111
NA
1540
<0.2
3.55
<5
NA
NA
NA
NA
NA
<5
1. 124j
NA
0.076
MW-22D
Transition Zone
11/15/2018
<0.05
0.377 j
1.72
0.12
28.5
NA
919
<0.2
4.38
1.721 j
NA
NA
NA
NA
NA
<5
<2
NA
0.12
MW-23BRR
Bedrock
01/30/2018
<0.05
2.37
<1
0.11
<1
NA
143
<0.2
0.586
<5
NA
NA
NA
NA
NA
<5
0.18
NA
0.11
MW-23BRR
Bedrock
04/11/2018
<0.05
2.44
<1
0.11
<1
NA
150
0.085j
0.686
3.349j
NA
NA
NA
NA
NA
<5
0.13
NA
0.097
MW-23BRR
Bedrock
07/26/2018
<0.05
2.15
<1
0.1
<1
NA
136
<0.2
0.728
6
NA
NA
NA
NA
NA
<5
0.13
NA
0.11
MW-23BRR
Bedrock
11/13/2018
0.028 j
2.1
<1
0.11
<1
NA
134
<0.2
0.612
<5
NA
NA
NA
NA
NA
<5
0.093 j
NA
0.11
MW-24BR
Bedrock
01/30/2018
<0.05
5.32
<1
<0.05
<1
NA
1790
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.68
NA
<0.05
MW-24BR
Bedrock
04/11/2018
<0.05
5.8
0.417j
<0.05
<1
NA
1780
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.65
NA
<0.05
MW-24BR
Bedrock
07/27/2018
<0.05
6.86
0.735j
<0.05
<1
NA
1740
0.124 j,B2
<0.3
4.908j
NA
NA
NA
NA
NA
<5
0.58
NA
<0.05
MW-24BR
Bedrock
11/14/2018
<0.05
7.07
<1
<0.05
<1
NA
1740
<0.2
0.211j
<5
NA
NA
NA
NA
NA
<5
0.54
NA
<0.05
MW-25BR
Bedrock
01/30/2018
<0.05
3.1
<1
<0.05
<1
NA
1830
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
<0.2
NA
<0.05
MW-25BR
Bedrock
04/11/2018
<0.05
1.96
0.551j
<0.05
<1
NA
1810
0.104j
0.105j
2.007j
NA
NA
NA
NA
NA
<5
0. 137j
NA
<0.05
MW-25BR
Bedrock
07/26/2018
<0.05
2.91
0.525j
<0.05
<1
NA
1780
<0.2
0. 153j
<5
NA
NA
NA
NA
NA
<5
0.21
NA
<0.05
MW-25BR
Bedrock
11/13/2018
0.022j
3.07
0.365j
<0.05
<1
NA
1780
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.123j
NA
<0.05
Page 15 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
PH
7.2
Water
Level
38.32
Temp
13
Spec
Coed
884
DO
0.36
ORP
-96
Eh
109
Turbidity
4.2
Alkalinity
376
Bi-
carbonate
Alkalinity
376
Sulfide
0.14
Total
Organic
Carbon
1.6 SI
Total
Suspended
Solids
5
Boron
<50
Calcium
83.9
Chloride
42
Strontium
257
Sulfate
66
Total
Dissolved
Solids
510
Aluminum
59
Antimony
<1
Arsenic
6.89
Barium
62
Beryllium
<1
Cadmium
<1
Chromium
(VI)
<0.025
Chromium
<1
Cobalt
<1
Copper
<1
Iron
2050
Lead
<1
MW-26BR
Bedrock
01/30/2018
MW-26BR
Bedrock
04/11/2018
7.2
35.94
14
887
0.37
-109
96
7.0
388 M1
388
0.17
1.5 S1
6
21.977 j
81.2
41
243
64
510
69
<1
6.67
61
<1
<1
<0.025
<1
0.661 j
0.403 j
2090
<1
MW-26BR
Bedrock
07/26/2018
7.2
36.55
18
877
1.12
-100
105
3.1
379 M3
379
<0.1
1.6
<5
<50
85.8
39
262
67
510
33 S3
<1
5.54
65
<1
<1
<0.025
0.443j
0.847j
0.798j
2300
<1
MW-26BR
Bedrock
11/14/2018
7.2
35.32
14
867
2.18
-68
137
5.9
348
348
<0.1
I 1.5 S1
6
<50
87.8
39
264
69
510
14
<1
3.13
65
<1
<1
<0.025
<1
0.627 j
0.345 j
1620
<1
MW-27BR
Bedrock
01/31/2018
7.4
37.65
15
886
0.26
-99
106
3.1
269
269
<0.1
1.4 S1
<5
<50
119
19
303
230
660
32
<1
1.7
28
<1
<1
<0.025
<1
<1
<1
848
<1
MW-27BR
Bedrock
04/12/2018
7.3
31.10
15
893
0.40
16
221
9.2
241
241
<0.1
1.3 S1
8
<50
128
20
270
250
590
71
<1
1.21
22
<1
<1
<0.025
2.42
0.381j
0.717j
644
<1
MW-27BR
Bedrock
07/27/2018
7.2
32.49
23
927
0.93
77
282
2.5
220
220
<0.1
1.3 S1
5
<50
123
20
303
260
620
54
<1
1.58
26
<1
<1
<0.025
<1
0.458j
0.59j
711
<1
MW-27BR
Bedrock
11/14/2018
7.3
29.89
14
961
0.38
109
314
2.0
214
214
<0.1
1.2 SI
<5
<50
132
21
307
280
630
12
<1
1.07
21
<1
<1
<0.025
<1
<1
<1
480
<1
MW-28BR
Bedrock
01/29/2018
7.8
60.97
11
657
0.36
-78
127
9.8
261
261
0.2
6.2 S1
13
<50
37.6
27
268
63
400
330
<1
3.31
35
<1
<1
<0.025
1.98
<1
<1
819
<1
MW-28BR
Bedrock
04/11/2018
7.5
59.39
14
675
0.44
-44
161
9.2
274
274
0.22
5.9
7
39.893j
38.1
28
279
65
360
166
0.563j
3.28
39
<1
<1
0.033 M1
3.94
<1
0.628j
554
<1
MW-28BR
Bedrock
07/25/2018
7.5
60.12
20
683
1.07
-195
10
9.9
248
248
<0.1
5.9 S1
<5
49.234j
36.5
28
323
67
380
202
0. 566j
4.05
37
<1
<1
<0.025
0.595j
<1
0.847j
671
<1
MW-28BR
Bedrock
11/13/2018
7.4
57.28
14
712
0.21
-136
69
4.2
258
258
0.48
6.2
<5
52
37.6
29
358
73
410
32
<1
4.03
35
<1
<1
0.035
<1
<1
<1
514
<1
MW-29BR
Bedrock
01/29/2018
7.5
44.28
13
517
0.32
-68
137
3.8
255
255
<0.1
0.992 SI
<5
<50
59.3
13
160
14
290
84
<1
1.76
47
<1
<1
<0.025
<1
<1
<1
483
<1
MW-29BR
Bedrock
04/11/2018
7.3
42.00
14
514
0.24
-12
193
6.8
262
262
<0.1
0.822 SI
7
<50
60.2
13
157
13
260
115
<1
1.71
52
<1
<1
<0.025
0.489j
0.426j
0.435j
545
<1
MW-29BR
Bedrock
07/25/2018
7.3
41.78
17
392
0.74
-75
130
2.0
224
224
<0.1
0.78 SI
<5
<50
55.6
11
142
11
270
17
<1
1.18
34
<1
<1
<0.025
<1
<1
<1
380
<1
MW-29BR
Bedrock
11/13/2018
7.2
37.83
15
486
1.70
-58
147
2.3
229
229
<0.1
0.553
<5
<50
56.6
11
141
11
260
12
<1
0.859j
29
<1
<1
<0.025
<1
<1
<1
331
<1
MW-30BR
Bedrock
01/30/2018
6.9
64.09
14
777
0.38
-52
153
1.9
349
349
<0.1
1.9 SS
9
<50
104
32
304
63
470
33
<1
1.7
14
<1
<1
<0.025
1.78
<1
<1
2110
<1
MW-30BR
Bedrock
04/11/2018
6.8
64.21
15
782
0.22
13
218
2.0
334
334
<0.1
1.8 51
8
23.429 j
105
31
305
61
450
38
<1
1.49
15
<1
<1
<0.025
0.745 j
0.644 j
0.354 j
2290
<1
MW-30BR
Bedrock
07/26/2018
6.8
64.13
17
773
1.60
-46
159
2.7
331
331
<0.1
1.8
8
25.522j
97.2
32
298
62
450
25
<1
1.21
13
<1
<1
<0.025
<1
0.529j
0.336j
2180
<1
MW-30BR
Bedrock
11/13/2018
6.9
63.30
15
782
0.34
-42
163
2.5
308
308
<0.1
1.7
<5
27.242j
98.8
32
294
63
470
7
<1
1.17
12
<1
<1
<0.025
<1
0.511j
<1
2080
<1
MW-33BR
Bedrock
01/30/2018
7.0
40.31
15
682
0.18
7
212
7.5
316
316
<0.1
1 SS
7
<50
83.9
27
321
35
400
188
<1
<1
47
<1
<1
0.047
<1
<1
1.3
191
<1
MW-33BR
Bedrock
04/09/2018
6.7
38.68
17
682
0.30
24
229
4.7
289
289
<0.1
0.979 S1
<5
<50
80.9
26
323
35
380
174
<1
<1
52
<1
<1
<0.025
2.73
0.588j
0.729j
163
<1
MW-33BR
Bedrock
07/27/2018
6.8
39.82
19
663
0.58
-18
187
2.1
302
302
<0.1
1.1 S1
<5
<50
82.4
28
326
34
370
38 SI
<1
<1
41
<1
<1
<0.025
<1
0.519 j
0.611 j
43 SI
<1
MW-31BR
Bedrock
11/13/2018
7.0
36.85
16
681
0.57
31
236
1.3
277
277
<0.1
0.939
<5
<50
82.9
27
318
34
400
8
<1
<1
43
<1
<1
<0.025
<1
0.513j
<1
9.125j
<1
MW-32BR
Bedrock
01/30/2018
7.8
42.14
11
908
1.19
-125
80
7.9
166
166
0.67 M1
3.9 SI
5
<50
124
19
620
370
670
71
<1
2.83
35
<1
<1
<0.025
9.12
<1
<1
567
<1
MW-32BR
Bedrock
04/09/2018
7.5
41.53
16
880
0.23
-122
83
2.6
163
163
0.33
4.5
24
23.138j
127
15
635
330
670
27
<1
2.02
27
<1
<1
0.037
<1
<1
<1
421
<1
MW-32BR
Bedrock
07/26/2018
7.5
41.45
19
901
0.48
-191
14
1.6
153
153
0.91
3.1
8
17.886j
130
12
640
330
690
18
<1
1.78
27
<1
<1
0.064
<1
<1
<1
173
<1
MW-32BR
Bedrock
11/13/2018
7.6
40.80
14
934
2.01
-142
63
1.9
144
144
0.6
3.7
<5
24.713j
135
17
638
380
660
13
<1
2.74
30
<1
<1
0.073
<1
<1
<1
200
<1
MW-33BR
Bedrock
02/01/2018
10.2
64.85
12
752
3.74
3
208
29.9
221
102
<0.1
4.9 SI
0
32.4
26
663
68
340
1830 M1
<1
1.55
<1
<1
<0.025
18.7
<1
3.47
909
<1
MW-33BR
Bedrock
04/09/2018
12.0
65.12
17
2152
0.56
-152
53
3.2
424
<5
<0.1
8.2
<5
<50
2.99
28
1240
72
620
56
<1
0.474j
137
<1
<1
0.052
<1
<1
<1
5.365j
<1
MW-33BR
Bedrock
07/26/2018
12.3
64.09
25
4958
1.91
-194
11
2.8
1000
<5
0.24
15
<5
<50
56.3
29
3550
43
1200
635
<1
0.722j
327
<1
<1
0.15
<1
<1
<1
3.558j
<1
MW-33BR
Bedrock
11/13/2018
12.4
62.35
14
5663
2.62
-213
-8
1.6
1240
<5
0.15
17
<5
<50
120
31
5280
29
1400
675
<1
0.48j
543
<1
<1
0.23
<1
<1
<1
<10
<1
FRO-SO-1
Bedrock
06/20/2018
7.1
1 NM
NM
NM
NM
NM
NM
0.6
320
NA
NA
NA
<5
<100
120
220
720
18
800
<500
<2
<5
230
<2
<1
NA
<1
1.9
1 <10
510
<5
Prepared by: BER Checked by: CDE
Page 16 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Lithium
<5
Magnesium
34
Manganese
527
Mercury
<0.05
Molybdenum
15.7
Nickel
<1
Nitrate+
Nitrite
<0.01
Potassium
7.84
Selenium
<1
Sodium
64.8 B2„B3
Thallium
<0.2
Vanadium
0.403
Zinc
<5
Aluminum
(0.45u)
5
Antimony
(0.45u)
<1
Arsenic
(0.45u)
3.78
Barium
(0.45u)
63
Beryllium
(0.45u)
<1
Boron
(0.45u)
<50
Cadmium
(0.45u)
<1
Chromium
(0.45u)
<1
Cobalt
(0.45u)
<1
Copper
(0.45u)
<1
Iron
(0.45u)
1510
Lead
(0.45u)
<1
Lithium
(0.45u)
<5
Manganese
(0.45u)
540
MW-26BR
Bedrock
01/30/2018
MW-26BR
Bedrock
04/11/2018
<5
33.9
520
<0.05
15.5
0.818j
0.0039j
7.46
<1
62.8
0.177j
0.337
<5
7
<1
4.5
62
<1
20.257j
<1
<1
0.484j
<1
1450
<1
<5
521
MW-26BR
Bedrock
07/26/2018
<5
38.2
570
<0.05
14.9
1.28
0.0085j
7.97
<1
55.5
0.09j
0.399
9
3.848j
<1
2.34
65
<1
<50
<1
<1
0.412j
<1
1250
<1
<5
585
MW-26BR
Bedrock
11/14/2018
<5
36.1 B2
530
0.023 j
14.4
0.404 j
<0.01
8
<1
52.8
<0.2
0.317
<5
3.723 j
<1
2.02
64
<1
<50
<1
<1
0.442 j
<1
1190
<1
2.395 j
550
MW-27BR
Bedrock
01/31/2018
<5
37.8
298
<0.05
1.84
<1
<0.01
7.51
<1
21.1
<0.2
<0.3
<5
7
<1
<1
22
<1
<50
<1
<1
<1
<1
485
<1
<5
260
MW-27BR
Bedrock
04/12/2018
<5
42.5
256
<0.05
1.58
1.25
<0.01
7.39
<1
20.3
<0.2
0.337
5
4.926 j
<1
1.03
23
<1
<50
<1
0.391 j
<1
<1
479
<1
3.79 j
271
MW-27BR
Bedrock
07/27/2018
<5
39.9
268
<0.05
1.83
0.785j
0.0045j
7.26
<1
20.4
<0.2
0.4
3.221j
4.562j
<1
0.824j
21
<1
<50
<1
<1
<1
<1
392
<1
2.322j
255
MW-27BR
Bedrock
11/14/2018
2.526j
39.6
278
<0.05
1.19
<1
<0.01
6.98
<1
19.7
<0.2
0.238j
<5
4.413j
<1
0.778j
20
<1
<50
<1
<1
<1
<1
401
<1
2.957j
281
MW-28BR
Bedrock
01/29/2018
<5
19.1
216
<0.05
10.1
1.76
<0.01
4.38
<1
79.4
<0.2
1.64
17
8
<1
2.4
38
<1
<50
<1
<1
<1
<1
319
<1
<5
197
MW-28BR
Bedrock
04/11/2018
<5
18.8
203
<0.05
8.3
2.35
<0.01
4.51
<1
78.9
<0.2
1.03
10
8
0.404j
2.91
37
<1
37.823j
<1
0.442j
<1
<1
302
<1
<5
184
MW-28BR
Bedrock
07/25/2018
<5
17.8
214
<0.05
7.26
2.54
0.011
3.36
<1
91.8
0.088 j
1.23 S1
2.373 j
5
0.695 j
2.95
39
<1
49.165 j
<1
<1
<1
<1
196
<1
3.509 j
197
MW-28BR
Bedrock
11/13/2018
<5
18.2
222
0.023j
4.46
<1
0.0061j
3.12
<1
102
<0.2
0.494
<5
7
<1
3.51
33
<1
49.294j
<1
<1
<1
<1
82
<1
<5
215
MW-29BR
Bedrock
01/29/2018
<5
21
110
<0.05
2.45
<1
<0.01
7.24
<1
19.9 B3
<0.2
0.455
<5
6
<1
<1
39
<1
<50
<1
<1
<1
<1
327
<1
<5
82
MW-29BR
Bedrock
04/11/2018
<5
21
108
<0.05
2.21
0.523j
<0.01
7
<1
19.7
<0.2
0.447
2.423j
8
<1
1.01
39
<1
<50
<1
<1
<1
<1
335
<1
<5
77
MW-29BR
Bedrock
07/25/2018
<5
19.2
77
<0.05
2
0.443j
<0.01
5.18
<1
17.5
<0.2
0.34 S1
<5
4.828j
<1
0.688j
28
<1
<50
<1
<1
<1
<1
297
<1
2.282j
73
MW-29BR
Bedrock
11/13/2018
<5
19.3
81
0.021j
1.88
<1
<0.01
4.94
<1
17.3
<0.2
0.169j
<5
18
<1
0.448j
22
<1
<50
<1
<1
<1
<1
216
<1
<5
66
MW-30BR
Bedrock
01/30/2018
6
24.2
1050
<0.05
5.06
1.7
<0.01
4.62
<1
32.9 B2„B3
<0.2
0.31
<5
8
<1
1.28
14
<1
<50
<1
<1
<1
<1
1980
<1
<5
1070
MW-30BR
Bedrock
04/11/2018
2.981j
24.7
1080
<0.05
4.6
0.815j
0.0035j
4.53
<1
33
<0.2
0.269j
<5
6
<1
1.25
14
<1
26.534j
<1
<1
0.495j
<1
2010
<1
3.753j
1060
MW-30BR
Bedrock
07/26/2018
3.406j
23.8
1070
<0.05
4.66
0.601j
0.0068j
4.36
<1
31.6
<0.2
0.302
3.02j
4.753j
<1
0.946j
13
<1
34.773j
<1
<1
0.457j
<1
2030
<1
2.575j
1110
MW-30BR
Bedrock
11/13/2018
2.872j
24.2
1080
<0.05
4.97
<1
<0.01
4.28
<1
30.5
<0.2
0.222j
<5
84 S1
<1
0.889j
13
<1
36.407j
<1
<1
0.464j
<1
2020
<1
2.722j
1100
MW-31BR
Bedrock
01/30/2018
10
26.5
354
<0.05
1
1.04
0.55
5.96
1.92
23.5 B2„B3
<0.2
2.5
<5
<5
<1
<1
43
<1
<50
<1
<1
<1
<1
<10
<1
10
349
MW-31BR
Bedrock
04/09/2018
9
26.2
386
<0.05
1.12
2.15
0.546
6.02
1.79
23
<0.2
2.46
<5
3.013j
<1
<1
46
<1
<50
<1
<1
0.404j
<1
5.892j
<1
7
367
MW-31BR
Bedrock
07/27/2018
8
26.6
361
<0.05
0.926j
0.777j
0.719
5.7
1.74
24.2
<0.2
2.5
2.102j
2.618j
<1
<1
39
<1
<50
<1
<1
0.385j
<1
<10
<1
8
360
MW-31BR
Bedrock
11/13/2018
7
25.9
378
0.019j
0.797j
<1
0.62
5.52
1.54
23.3
<0.2
2.36
2.466j
2.494j
<1
<1
39
<1
<50
<1
<1
0.445j
<1
<10
<1
7
358
MW-32BR
Bedrock
01/30/2018
<5
17.8
148
<0.05
4.39
7.82
<0.01
5.16
<1
58.9 B2„B3
<0.2
0.458
9
5
<1
3.06
35
<1
<50
<1
1.13
<1
<1
455
<1
<5
155
MW-32BR
Bedrock
04/09/2018
3.511j
17.6
117
<0.05
2.52
0.48j
<0.01
3.96
<1
41.4
<0.2
0.272j
4.138 j,S1
6
<1
2.82
33
<1
27.725j
<1
<1
<1
<1
514
<1
1.791j
147
MW-32BR
Bedrock
07/26/2018
4.241j
17.5
117
<0.05
1.59
0.8j
0.0062j
4.12
<1
43.2
<0.2
0.265j
1.935j
6
<1
3.79
38
<1
29.815j
<1
<1
<1
<1
625
<1
3.894j
185
MW-32BR
Bedrock
11/13/2018
<5
18.2
137
0.019j
1.4
<1
<0.01
4.21
<1
51.6
<0.2
0.419
<5
4.118j
<1
2.04
28
<1
24.933j
<1
<1
<1
<1
191
<1
<5
128
MW-33BR
Bedrock
02/01/2018
8.25
<0.05
12.7
<0.01
59.9
<1
81.8
<0.2
2.08
26
<5
<1
<1
42
<1
<50
<1
<1
<1
<1
<10
<1
MW-33BR
Bedrock
04/09/2018
52
00.225
<5
<0.05
6.96
0.819j
<0.01
149
<1
144
<0.2
0.76
<5
29
<1
0.485j
133
<1
<50
<1
<1
<1
<1
<10
<1
513
<5
MW-33BR
Bedrock
07/26/2018
945
0.07
<5
<0.05
8.24
2.12
0.0068j
301
<1
267
0.088j
4.15
<5
651
<1
0.79j
328
<1
<50
<1
<1
<1
<1
4.181j
<1
935
<5
MW-33BR
Bedrock
11/13/2018
1120
0.008
<5
0.042j
7.17
1.89
<0.01
331
0.362j
288
<0.2
3
<5
702
<1
0.509j
544
<1
<50
<1
<1
<1
<1
<10
<1
1140
<5
RO-10-1
Bedrock
06/20/2018
NA
44
840
<0.5
<10
<10
NA
6.1
<5
54
70.1
4.2
<50
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
I NA
NA
Prepared by: BER Checked by: CDE
Page 17 of 18

TABLE 3-3
2018 COMPREHENSIVE GROUNDWATER QUALITY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
OTHER PARAMETERS
Mercury
(0.45u)
<0.05
Molybdenum
(0.45u)
11.1
Nickel
(0.45u)
<1
Phosphorus
(0.45u)
<0.05
Selenium
(0.45u)
<1
Silver
(0.45u)
NA
Strontium
(0.45u)
255
Thallium
(0.45u)
<0.2
Vanadium
(0.45u)
<0.3
Zinc
(0.45u)
<5
Radium-226
NA
Radium-228
NA
Total
Radium
NA
Uranium-238
NA
Total
Uranium
NA
Carbonate
Alkalinity
<5
Fluoride
0.14
Hardness
NA
Phosphorus
<0.05
MW-26BR
Bedrock
01/30/2018
MW-26BR
Bedrock
04/11/2018
<0.05
10.7
0.394j
<0.05
<1
NA
256
0. 153j
0. 114j
10
NA
NA
NA
NA
NA
<5
0.13
NA
<0.05
MW-26BR
Bedrock
07/26/2018
0.017j
9.16
0.689j
<0.05
<1
NA
260
<0.2
0.237j
<5
NA
NA
NA
NA
NA
<5
0.13
NA
<0.05
MW-26BR
Bedrock
11/14/2018
<0.05
9.87
<1
<0.05
<1
NA
257
<0.2
0.284j
<5
NA
NA
NA
NA
NA
<5
0.12
NA
<0.05
MW-27BR
Bedrock
01/31/2018
<0.05
1.5
<1
<0.05
<1
NA
273
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
<0.5
NA
<0.05
MW-27BR
Bedrock
04/12/2018
<0.05
1.46
0.412j
<0.05
<1
NA
295
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.31j
NA
<0.05
MW-27BR
Bedrock
07/27/2018
<0.05
1.42
<1
<0.05
<1
NA
295
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.2195j
NA
<0.05
MW-27BR
Bedrock
11/14/2018
<0.05
1.13
<1
<0.05
<1
NA
294
<0.2
0.254j
<5
NA
NA
NA
NA
NA
<5
0.1755j
NA
<0.05
MW-28BR
Bedrock
01/29/2018
<0.05
9.4
<1
<0.05
<1
NA
269
<0.2
0.43
<5
NA
NA
NA
NA
NA
<5
0.3
NA
0.063
MW-28BR
Bedrock
04/11/2018
<0.05
6.94
0.396j
<0.05
<1
NA
287
0. 138j
0.452
<5
NA
NA
NA
NA
NA
<5
0.23
NA
0.052
MW-28BR
Bedrock
07/25/2018
<0.05
7.63
1.34
<0.05
<1
NA
302
0.091j
0.412
1.827j
NA
NA
NA
NA
NA
<5
0.24
NA
<0.05
MW-28BR
Bedrock
11/13/2018
<0.05
1.88
<1
<0.05
<1
NA
344
<0.2
0.292j
<5
NA
NA
NA
NA
NA
<5
0.25
NA
<0.05
MW-29BR
Bedrock
01/29/2018
<0.05
2.16
<1
<0.05
<1
NA
146
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.23
NA
<0.05
MW-29BR
Bedrock
04/11/2018
<0.05
2.1
<1
<0.05
<1
NA
152
<0.2
0.158j
5
NA
NA
NA
NA
NA
<5
0.17
NA
<0.05
MW-29BR
Bedrock
07/25/2018
<0.05
2.15
<1
<0.05
<1
NA
136
<0.2
0. 122j
<5
NA
NA
NA
NA
NA
<5
0.18
NA
<0.05
MW-29BR
Bedrock
11/13/2018
0.018j
1.69
<1
<0.05
<1
NA
139
<0.2
0. 116j
<5
NA
NA
NA
NA
NA
<5
0.15
NA
<0.05
MW-30BR
Bedrock
01/30/2018
<0.05
4.41
<1
<0.05
<1
NA
296
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.11
NA
<0.05
MW-30BR
Bedrock
04/11/2018
<0.05
4.18
0.391j
<0.05
<1
NA
302
<0.2
0. 146j
1.876j
NA
NA
NA
NA
NA
<5
0.12
NA
<0.05
MW-30BR
Bedrock
07/26/2018
<0.05
4.67
0.454j
<0.05
<1
NA
288
<0.2
0.242j
4.159j
NA
NA
NA
NA
NA
<5
0.12
NA
<0.05
MW-30BR
Bedrock
11/13/2018
<0.05
4.65
0.378j
<0.05
<1
NA
291
<0.2
<0.3
4.148j
NA
NA
NA
NA
NA
<5
0.09j
NA
<0.05
MW-31BR
Bedrock
01/30/2018
<0.05
<1
<1
0.059
2.14
NA
313
<0.2
1.94
<5
NA
NA
NA
NA
NA
<5
<0.1
NA
0.058
MW-31BR
Bedrock
04/09/2018
<0.05
0.911j
0.58j
<0.05
1.88
NA
313
<0.2
2.01
2.963j
NA
NA
NA
NA
NA
<5
0.11
NA
0.057
MW-31BR
Bedrock
07/27/2018
<0.05
0.709j
0.34j
0.054
1.61
NA
321
0.088 j,B2
2.12
1.893j
NA
NA
NA
NA
NA
<5
0.1
NA
0.053
MW-31BR
Bedrock
11/13/2018
<0.05
0.66j
<1
0.066
1.57
NA
308
<0.2
2.24
<5
NA
NA
NA
NA
NA
<5
0.065j
NA
0.059
MW-32BR
Bedrock
01/30/2018
<0.05
4.13
2.18
<0.05
<1
NA
599
<0.2
<0.3
<5
NA
NA
NA
NA
NA
<5
0.91
NA
<0.05
MW-32BR
Bedrock
04/09/2018
<0.05
2.87
<1
<0.05
<1
NA
596
<0.2
0. 149j
<5
NA
NA
NA
NA
NA
<5
1.1
NA
<0.05
MW-32BR
Bedrock
07/26/2018
<0.05
2.12
0.352j
<0.05
<1
NA
643
<0.2
0.26j
<5
NA
NA
NA
NA
NA
<5
1.1
NA
<0.05
MW-32BR
Bedrock
11/13/2018
0.017j
1.1
<1
<0.05
<1
NA
641
<0.2
0.269j
<5
NA
NA
NA
NA
NA
<5
0.89
NA
<0.05
MW-33BR
Bedrock
02/01/2018
<0.05
705
1
NA
473
<5
NA
NA
NA
NA
NA
imo9
0.24
NA
MW-33BR
Bedrock
04/09/2018
<0.05
7.05
0.789j
<0.05
<1
NA
1200
_EE.2
<0.2
0.739
<5
NA
NA
NA
NA
NA
119
0. 168j
NA
<0.05
MW-33BR
Bedrock
07/26/2018
0.027j
8.04
1.9
<0.05
<1
NA
3560
<0.2
3.81
<5
NA
NA
NA
NA
NA
393
0.0592j
NA
<0.05
MW-33BR
Bedrock
11/13/2018
0.022j
7.08
1.99
<0.05
0.412j
NA
5340
<0.2
3.17
<5
NA
NA
NA
NA
NA
2420
<0.1
NA
<0.05
RO-10-1
Bedrock
06/20/2018
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
<0.2
470
NA
Prepared by: BER Checked by: CDE
Page 18 of 18

TABLE 3-4
DATA QUALIFIERS AND ACRONYMS
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
COLOR NOTES
Bold highlighted concentration indicates exceedance of the 15A NCAC 02L .0202 Standard or the IMAC.
(Effective date for 15A NCAC 02L .0202 Standard and IMAC is April 1, 2013)
Turbidity of Sample >_ 10 NTUs
Provisional Background Threshold Values updated with Background Results through June 2017.
Analytical data review has not been completed for this dataset.
ABBREVIATION NOTES
BGS - below ground surface
BOD - Biologic Oxygen Demand
CB - Compliance Boundary
COD - Chemical Oxygen Demand
Deg C - Degrees Celsius
DMAs - dimethylarsinic acid
DUP - Duplicate
EB - East Ash Basin
EEI - Eastern Extension Impoundment of the East Ash Basin
Eh - Redox Potential
ft - Feet
GPM - gallons per minute
GSA - Gypsum Storage Area
IMAC - Interim Maximum Allowable Concentrations. From the 15A NCAC 02L Standard, Appendix 1, April 1, 2013.
MDC - Minimum Detectable Concentration
McSe - Methylseleninic acid
meg/100g - millequivalents per 100 grams
mg/kg - milligrams per kilogram
mg/L - milligrams per liter
mg-N/L - Milligram nitrogen per liter
MMAs - monomethylarsonic acid
mV - millivolts
NA - Not available or Not Applicable
NE - Not established
NM - Not measured
NTUs - Nephelometric Turbidity Units
pCi/L - picocuries per liter
PSRG - Primary Soil Remediation Goals
RL - Reporting Limit
RR - Railroad
SeCN - selnocynante
SEI - Southern Extension Impoundment of the West Ash Basin
SeMe (IV) - Selenomethionine
SPLP - Synthetic Precipitation Leaching Procedure
S.U. - Standard Units
TCLP - Toxicity Characteristic Leaching Procedure
ug/L - micrograms per liter
ug/mL - microgram per milliliter
umhos/cm - micromhos per centimenter
WB - West Ash Basin
Well Locations referenced to NAD83 and elevations referenced to NAVD88
Page 1 of 2

TABLE 3-4
DATA QUALIFIERS AND ACRONYMS
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
LABORATORY FLAGS
< - concentration not detected at or above the adjusted reporting limit.
^ - Federal MCL.
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013.
1g - Result confirmed by second analysis performed out of hold.
2g - The concentration in the Blank QC is less than the reporting limit but greater than 1/2 the reporting limit.
B - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10X the
concentration in the method blank. Analyte concentration in sample could be due to blank contamination.
B1 - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample was greater than 1OX the
concentration in the method blank. Analvte concentration in sample is not affected by blank contamination.
B2 - Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte
concentration in sample is valid and may be used for compliance purposes.
B3 - Target analyte was detected in Continuing Calibration Blank(s) at a concentration greater than 1/2 the reporting limit but less than the
reportino limit. Analvte concentration in sample is valid and may be used for compliance purposes.
B4 - Target analyte was detected in Continuing Calibration Blank(s) at or above the reporting limit.
B5 - Target analyte was present in blank(s) above the method detection limit but less than the reporting limit. Data is valid for compliance
ur oses.
B6 - Target analyte was detected in Continuing Calibration Blank(s) at a concentration greater than the reporting limit.
CH - The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased high.
CL - The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low.
CR - The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis.
CU - The continuing calibration for this compound is outside of Pace Analytical acceptance limits. Analyte presence below reporting limits in
associated samples. Results unaffected by high bias.
D3 - Sample was diluted due to the presence of high levels of non -target analytes or other matrix interference.
D4 - Sample was diluted due to the presence of high levels of target analytes.
D6 - The precision between the sample and sample duplicate exceeded laboratory control limits.
E - %difference of sample and SD is >10%. Sample concentration must meet flagging criteria.
H - Sample analyzed past the recommended holding time.
H1 - Analysis conducted outside the EPA method holding time.
H2 - Extraction of preparation conducted outside EPA method holding time.
H3 - Sample was received or analysis requested beyond the recognized method holding time.
H6 - Analysis initiated outside of the 15 minute EPA required holding time.
j - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
33 - The sample matrix interfered with the ability to make any accurate determination.
Ll - Analyte recovery in the laboratory control sample (LCS) was above quality control (QC) limits. Results may be biased high.
L2 - Analyte recovery in the laboratory control sample (LCS) was below QC limits. Results for this analyte in associated samples may be biased low.
L3 - Analyte recovery in the laboratory control sample (LCS) exceeded quality control (QC) limits. Analyte presence below reporting limits in
associated samples. Results unaffected by high bias.
M - Matrix spike / matrix spike dup failure.
M1 - Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
M2 - Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable.
M4 - The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level.
M6 - Matrix spike and Matrix spike duplicate recovery not evaluated against control limits due to sample dilution.
N1 - Nitrate analyzed on 11/5/15, but LCS and CCV recoveries were above the limits (111%,113%). Samples were re -analyzed on 11/6/15, but
past the recommended 48-hour holding time. The original data from 11 5 15 is reported, with possible high bias.
N2 - The lab does not hold accreditation for this parameter.
ND - Not detected
P2 - Re -extraction or re -analysis could not be performed due to insufficient sample amount.
P4 - Sample field preservation does not meet EPA or method recommendations for this analysis.
P8 - Analyte was detected in the method blank. All associated samples had concentrations of at least ten times greater than the blank or were
below the reporting limit.
RO - The data are unusable. The sample results are rejected due to serious deficiencies in meeting QC criteria. The analyte may or may not be
present in the sample.
Rl - Relative Percent Difference (RPD) value was outside control limits.
S - Associated calibration check did not meet specified criteria.
S1 - Data review findings indicate result may be unreliable. Use with caution.
U - Analyte was analyzed for, but not detected above the MDC.
Page 2 of 2

TABLE 3-5
GEOMETRIC MEAN OF COIS - 2018 QUARTERLY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
SELECTED CONSTITUENTS OF INTEREST (COIs)
pH
Boron
Strontium
Sulfate
Tota I
Dissolved
Solids
Antimony
Chromium (VI)
Chromium
Cobalt
Iron
Manganese
Molybdenum
Selenium
Vanadium
Total Uranium
Reporting Units
S.U.
pg/L
Ng/L
mg/L
mg/L
pg/L
pg/L
pg/L
pg/L
Ng/L
Ng/L
pg/L
Ng/L
pg/L
Ng/mL
15A NCAC 02L Standard
6.5-8.5
700
NE
250
500
1*
10
10
1*
300
50
NE
20
0.3*
0.03^
Background Threshold Values (Transition Zone)
6.3-7.6
50
760
37
540
1
16.1
24.1
1
1173
405
4.17
1.78
30.2
0.00516
Background Threshold Values (Bedrock Zone)
6.8-8.3
50
232
73.5
530
1
0.19
3.61
I .4
4227
1198
35.2
1
2.49
0.00324
Sample ID
Location With Respect to Roxboro Monitoring
Source Areas and Boundaries Zone
Data Reduction
Method
ANALYTICAL RESULTS
ABMW-01
In WAB
Ash
GEOMEAN
9.26
12373
2090
189
387
3.3
0.12
<1
I <1
11
<5
2173
5.2
2
<0.0002
ABMW-01BR
In WAB
Bedrock
GEOMEAN
7.06
532
179
20
330
<1
0.04
<1
<1
1592
1004
2.4
<1
<0.3
<0.0002
ABMW-02
In WAB
Ash
GEOMEAN
8.11
5420
1036
57
235
<1
<0.025
<1
<1
1608
479
354
1.1
1.6
0.000391903
ABMW-02BR
In WAB
Bedrock
GEOMEAN
8.04
<50
532
79.4
420
<1
0.04
<1
<1
476
1148
8.6
<1
0.4
0.00038838
ABMW-03
In WAB
Ash
GEOMEAN
3.51
275
936
1890
1417
<1
<0.025
4.9
130
7164
8253
<1
1.8
2.4
NA
ABMW-03BR
In WAB
Bedrock
GEOMEAN
5.48
3154
1803
2648
3817
<1
<0.025
<1
189
7782
19956
<1
<1
2.5
NA
ABMW-03BRL
In WAB
Bedrock
GEOMEAN
7.74
<50
822
505
1 882
<1
<0.025
<1
<1
497
1 73
1.8
<1
<0.3
NA
ABMW-04
In EAB
Ash
Quarter
5.58
45000
9140
2200
3800
<1
<0.025
<1
6.4
71500
12300
774
<1
1.6
0.0241
ABMW-04BR
In EAB
Bedrock
Quarter 3
6.20
<50
183
20
230
<1
<0.025
<1
1
3710
1570
4.9
<1
0.64
0.000117
ABMW-05
In EAB
Ash
GEOMEAN
7.37
25527
4807
1298
2249
<1
<0.025
<1
1.5
3681
1701
2818
<1
0.58
0.005697819
ABMW-05D
In EAB
Saprolite
GEOMEAN
7.11
2841
482
9.3
242
<1
<0.025
<1
<1
33104
6270
14.8
<1
0.75
<0.0002
ABMW-06
In EAB
Ash
GEOMEAN
7.35
3179
10519
184
754
<1
0.03
<1
<1
672
836
10.3
<1
1.3
NA
ABMW-06BR
In EAB
Bedrock
GEOMEAN
6.66
<50
206
61.2
322
<1
<0.025
<1
<1
79
752
2.1
<1
0.4
NA
ABMW-07BR
In EAB
Bedrock
GEOMEAN
6.94
1509
241
115
422
<1
<0.025
<1
1.3
197
481
1.2
<1
0.33
NA
ABMW-07BRL
In EAB
Bedrock
GEOMEAN
7.54
171
792
247
532
<1
0.03
<1
<1
220
64
5.2
<1
<0.3
NA
BG-01 IMP
Southwest of WAB, background, outside CB
Transition - Bedrock
GEOMEAN
6.48
<50
457
17.5
332
<1
2.8
3
<1
63
<5
<1
<1
17.8
0.000567946
BG-01BR
Southwest of WAB, background, outside CB
Bedrock
GEOMEAN
6.88
<50
179
17.5
315
<1
0.07
1.6
<1
87
248
2.5
<1
2.3
0.000857646
BG-01BRLR
Southwest of WAB, background, outside CB
Bedrock
Quarter 4
8.50
22.8
567
79
460
1
<0.025
<1
<1
59
167
19.2
<1
0.68
0.0176
BG-02BR
Southwest of WAB, background, outside CB
Bedrock
GEOMEAN
8.08
<50
247
30.4
314
<1
0.03
1.6
<1
114
52
11.9
<1
0.34
0.002674471
CCR-104BR IMP
Edge of EAB
Bedrock
Quarter 1
6.60
6160
926
970
1800
<1
0.19
1
<1
457
60
1.8
30.3
3.1
NA
CCR-107BR (Geochem Model)
Edge of EAB
Bedrock
Quarter 3
6.34
4140
894
340
690
<1
0.06
<1
<1
4
<5
0.45
<1
12.5
0.000121
CCR-108BR (Geochem Model)
Edge of EAB
Bedrock
Quarter 3
6.63
11600
1490
1200
2100
<1
0.09
<1
0.56
<10
74
231
19.2
6.3
0.0055
CCR-113BR IMP
North of Intake Canal/EAB/GSA
Bedrock
Quarter 4
7.05
<50
207
140
450
<1
<0.025
<1
<1
432
44
1.3
<1
1.3
NA
CCR-113D IMP
North of Intake Canal/EAB/GSA
Transition
Quarter 4
6.74
<50
287
120
410
<1
0.10
<1
<1
109
20
<1
0.35
3.4
NA
CCR-202BR (Geochem Model)
Edge of WAB
Bedrock
Quarter 3
6.37
2880
1190
1800
2800
<1
<0.025
<1
<1
<10
93
1.0
0.42
4.1
0.00855
CCR-202D (Geochem Model)
Edge of WAB
Transition
Quarter 3
6.26
2770
1400
2100
3100
<1
<0.025
<1
<1
7
634
<1
<1
4.8
0.00924
CCR-203BR (Geochem Model)
Edge of WAB
Bedrock
Quarter 3
6.59
762
682
350
920
<1
<0.025
<1
8.6
178
355
5.0
<1
3.4
0.0067
CCR-203D (Geochem Model)
Edge of WAB
Transition
Quarter 3
6.29
491
858
300
800
<1
<0.025
<1
5.6
1440
460
<1
<1
1.8
0.00142
CCR-208BR (Geochem Model)
Edge of WAB
Bedrock
Quarter 3
6.39
50800
9370
1000
7500
<1
0.20
<1
38.2
<10
7770
220
<1
11.4
0.00859
CW-01 IMP
North of EAB on CB
Bedrock
GEOMEAN
6.15
<50
441
101
430
<1
<0.025
<1
<1
95
63
<1
<1
24.5
0.000392
CW-02 IMP
North of WAB on CB
Transition
GEOMEAN
6.69
1 <50
369
89.3
427
<1
0.42
<1
<1
150
81
<1
<1
25.2
0.00199862
CW-02D IMP
North of WAB on CB
Bedrock
GEOMEAN
6.67
<50
324
132
415
<1
0.41
<1
<1
11
<5
<1
<1
13
0.00134369
CW-03 IMP
South of WAB on CB
Transition
Quarter 3
6.40
<50
449
69
470
<1
0.07
<1
<1
13
<5
0.53
<1
3.7
NA
CW-03D IMP
South of WAB on CB
Bedrock
Quarter 3
7.41
<50
265
32
320
<1
0.08
<1
<1
24
<5
2.9
<1
2.7
NA
CW-04 IMP
South of WAB in CB
Transition - Bedrock
GEOMEAN
6.63
<50
189
39.2
340
<1
0.25
<1
<1
14
<5
5.9
<1
2.2
NA
CW-05 IMP
North of WAB on CB
Transition
GEOMEAN
6.52
260
296
189
443
<1
0.30
<1
<1
<10
<5
<1
<1
27.6
0.000243476
GMW-06 IMP
North of EAB in CB
Transition
GEOMEAN
6.42
2519
1037
627
1274
<1
0.59
<1
<1
31
11
<1
61.5
4.2
0.002292879
GMW-07 IMP
Western edge of EAB in CB
Bedrock
GEOMEAN
6.60
1 1953
673
250
934
<1
0.23
1.2
<1
85
<5
1.0
11.3
7.0
NA
GMW-08
Southern edge of EAB in CB
Bedrock
Quarter 3
6.56
3910
909
480
1400
<1
0.04
3.2
<1
42
52
3.3
<1
2
NA
GMW-08R IMP
Southern edge of EAB in CB
Bedrock
Quarter 4
6.60
3440
922
430
1300
<1
<0.025
<1
<1
44
258
13.2
<1
2.2
NA
GMW-09 IMP
Southeast edge of EAB in CB
Bedrock
GEOMEAN
6.16
<50
90.2
21.6
171
<1
0.13
<1
<1
28
<5
<1
<1
3.8
NA
GMW-10 IMP
Northern edge of EAB in CB
Bedrock
GEOMEAN
5.99
115
137
40.6
190
<1
0.15
<1
<1
123
6
<1
2.3
2.9
NA
GMW-11 IMP
Northern edge of EAB in CB
Bedrock
GEOMEAN
6.42
3183
518
476
950
<1
0.24
<1
<1
103
<5
<1
103
6.2
NA
GPMW-01BR
North of Gypsum Storage Area outside CB
Bedrock
GEOMEAN
6.56
1546
1227
1124
1724
<1
<0.025
<1
<1
863
142
3.6
<1
0.59
NA
GPMW-01D
North of Gypsum Storage Area outside CB
Transition
GEOMEAN
6.53
1038
1463
1149
1724
<1
<0.025
<1
<1
67
63
<1
<1
3.8
NA
GPMW-01S
North of Gypsum Storage Area outside CB
Saprolite
GEOMEAN
6.15
1751
2577
1245
1820
<1
<0.025
<1
10.3
231
3251
<1
<1
4.8
NA
GPMW-02BR
North of Gypsum Storage Area outside CB
Bedrock
GEOMEAN
6.54
2484
1278
1124
1949
<1
<0.025
<1
<1
239
1003
<1
<1
1.4
NA
GPMW-02D
North of Gypsum Storage Area outside CB
Transition
GEOMEAN
6.70
<50
909
587
1072
<1
<0.025
<1
7.3
96496
9129
1.4
<1
0.7
NA
GPMW-03BR
North of Gypsum Storage Area outside CB
Bedrock
GEOMEAN
7.44
234
873
474
747
<1
<0.025
<1
<1
138
36
3.5
<1
0.4
NA
GPMW-03D
North of Gypsum Storage Area outside CB
Transition
GEOMEAN
5.94
1444
1642
1222
1800
<1
0.05
<1
3.6
450
595
<1
50.5
1.8
NA
MW-01BR
North of EAB on CB
Bedrock
GEOMEAN
6.56
1581
505
114
622
<1
0.05
2.8
1.6
469
619
<1
6.3
15.5
NA
MW-02
Toe of WAB main dam in CB
Transition
GEOMEAN
5.98
3171
2423
215
2509
<1
0.11
<1
1.1
104
72
<1
<1
5
0.004183773
MW-02BR
Between EAB and WAB in CB
jBedrock
Quarter 1
6.20
<50
599
47
520
<1
<0.025
<1
3.7
20200
1450
2.0
<1
<0.3
NA
MW-03BR
North of Gypsum Storage Area outside CB
jBedrock
GEOMEAN
6.67
2715
1517
1373
2275
<1
<0.025
<1
1.4
167
50
<1
2.5
15.6
0.039023844
MW-04BR
Southwest of WAB in CB
lRedrock
GEOMEAN
7.64
<50--F
277
32.7
270
<1
0.04
1 <1
r <1
187
57
6.4
<1
0.51
NA
Page 1 of 2

TABLE 3-S
GEOMETRIC MEAN OF COIS - 2018 QUARTERLY DATA
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Analytical Parameter
SELECTED CONSTITUENTS OF INTEREST (COIs)
pH
Boron
Strontium
Sulfate
Tota I
Dissolved
Solids
Antimony
Chromium (VI)
Chromium
Cobalt
Iron
Manganese
Molybdenum
Selenium
Vanadium
Total Uranium
Reporting Units
S.U.
pg/L
pg/L
mg/L
mg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/mL
15A NCAC 02L Standard
6.5-8.5
700
NE
250
500
1*
10
10
1*
300
50
NE
20
0.3*
0.03^
Background Threshold Values (Transition Zone)
6.3-7.6
50
760
37
540
1
16.1
24.1
1
1173
405
4.17
1.78
30.2
0.00516
Background Threshold Values (Bedrock Zone)
6.8-8.3
50
232
73.5
530
1
0.19
3.61
6.4
4227
1198
35.2
1
2.49
0.00324
Sample ID
Location With Respect to Roxboro Monitoring
Source Areas and Boundaries Zone
Data Reduction
Method
ANALYTICAL RESULTS
MW-05BR
North of WAB on CB
Bedrock
GEOMEAN
7.24
<50
305
224
530
<1
<0.025
<1
4.5
392
327
1.9
<1
0.73
0.004973127
MW-05D
North of WAB on CB
Transition
GEOMEAN
6.55
716
407
397
665
<1
0.83
<1
<1
11
9
4.7
<1
14.3
0.000261078
MW-06BR
North of WAB on CB
Bedrock
Quarter 1
8.00
<50
152
14
220
<1
<0.025
<1
<1
497
96
2.8
<1
<0.3
0.0000921
MW-06D
North of WAB on CB
Transition
Quarter 1
8.00
<50
177
35
230
<1
0.06
<1
<1
62
5
<1
<1
6.6
0.000315
MW-07BR
West of WAB outside of CB
Bedrock
GEOMEAN
7.14
<50
109
24.2
207
<1
0.11
<1
<1
94.9
43
1.2
<1
10
NA
MW-08BR
West of WAB outside of CB
Bedrock
GEOMEAN
7.22
<50
215
26
367
<1
<0.025
1.3
<1
1806
715
2.5
<1
0.58
NA
MW-09BR
Northwest of WAB outside of CB
Bedrock
GEOMEAN
6.59
<50
205
23.2
220
<1
0.03
<1
1.1
136
126
<1
<1
5.2
0.000248497
MW-10BR
South of EAB outside CB
Bedrock
GEOMEAN
6.92
<50
172
40
327
<1
0.17
<1
16
<10
197
11.2
<1
2.9
0.002676114
MW-11BR
Northeast of EAB in CB
Bedrock
GEOMEAN
6.76
<50
179
41.2
307
<1
0.11
<1
<1
13
38
2.6
<1
5
0.000657182
MW-11D
Northeast of EAB in CB
Transition
GEOMEAN
6.48
<50
332
36.5
292
<1
<0.025
<1
5.4
128
1291
1.6
<1
3
0.000120383
MW-12BR
West of WAB in CB
Bedrock
GEOMEAN
7.21
<50
247
37.4
435
<1
<0.025
<1
9.4
3176
1235
5.9
<1
0.32
NA
MW-13BR
South of EAB outside of CB
Bedrock
GEOMEAN
6.18
<50
423
34.5
384
<1
0.05
<1
1 2.3
126
151
1.9
<1
6.2
0.000149457
MW-14BR
Northeast of EAB outside of CB
Bedrock
GEOMEAN
7.21
<50
180
13
355
<1
<0.025
<1
2.8
1491
353
2.5
<1
<0.3
0.000265345
MW-15BR
Southwest of WAB outside of CB
Bedrock
GEOMEAN
7.42
<50
129
32.5
359
<1
0.04
<1
<1
623
37
13.2
<1
0.30
0.000677507
MW-15D
Southwest of WAB outside of CB
Transition
GEOMEAN
6.51
<50
231
28.5
407
<1
2.7
2.7
<1
26
<5
<1
<1
10
0.000680523
MW-16BR
Southwest of EAB outside of CB
Bedrock
GEOMEAN
6.87
<50
161
24.2
280
<1
0.1
<1
<1
26
27
<1
<1
3
0.001162361
MW-17BR
East of EAB outside of CB
Bedrock
GEOMEAN
7.23
50
886
37
367
<1
0.03
<1
<1
434
251
2.7
<1
0.3
0.000253779
MW-18BR
Southeast of WAB outside of CB
Bedrock
GEOMEAN
7.93
<50
461
10.8
527
<1
<0.025
1.1
1.1
1255
816
3.8
<1
<0.3
0.000439975
MW-18D
Southeast of WAB outside of CB
Transition
GEOMEAN
6.92
<50
685
31.5
623
<1
7.2
8
<1
112
49
3.3
<1
1.3
0.003012082
MW-19BRL
South of EAB outside of CB
Bedrock
GEOMEAN
7.05
<50
251
15.7
462
<1
<0.025
<1
<1
3835
1439
2.7
<1
0.4
8.86029E-05
MW-20BRL
East of EAB outside of CB
Bedrock
GEOMEAN
7.49
<50
196
12.2
245
<1
<0.025
<1
<1
82
411
1.1
<1
<0.3
NA
MW-21BRLR
Southern edge of EAB in CB
Bedrock
Quarter 4
7.38
52
503
98
490
<1
0.03
<1
<1
66
129
18.6
<1
1.1
NA
MW-22BR
Southwest of Gypsum Storage Area
Bedrock
GEOMEAN
6.51
785
601
565
955
<1
0.03
<1
6.7
98
555
4.0
6.3
0.89
NA
MW-22D
Southwest of Gypsum Storage Area
Transition
GEOMEAN
6.15
383
1443
1016
1656
<1
<0.025
<1
5.2
14
1475
<1
73.2
3.9
NA
MW-23BRR
West of EAB outside of CB
Bedrock
GEOMEAN
6.84
<50
140
15.7
257
<1
<0.025
<1
<1
60
29
2.4
<1
0.96
NA
MW-24BR
East of EAB in CB
Bedrock
GEOMEAN
7.79
<50
1660
65.4
282
<1
0.04
1.7
<1
422
126
9.7
<1
0.32
NA
MW-25BR
East of EAB outside of CB
Bedrock
GEOMEAN
7.05
<50
1767
97.7
575
<1
<0.025
1.9
<1
2222
583
4.5
<1
<0.3
NA
MW-26BR
Southeast of WAB outside of CB
Bedrock
GEOMEAN
7.20
<50
256
66.5
510
<1
<0.025
<1
<1
1999
536
15.1
<1
0.36
NA
MW-27BR
North of EAB between EAB and GSA, in CB
Bedrock
GEOMEAN
7.30
<50
295
254
624
<1
<0.025
1.2
<1
657
275
1.6
<1
0.32
NA
MW-28BR
Northeast of the EAB outside of CB
Bedrock
GEOMEAN
7.56
<50
305
66.9
387
<1
0.03
1.5
<1
629
214
7.2
<1
1.01
NA
MW-29BR
Northeast of the EAB outside of CB
Bedrock
GEOMEAN
7.33
<50
150
12.2
270
<1
<0.025
<1
<1
427
93
2.1
<1
0.33
NA
MW-30BR
East of the EAB outside of CB
Bedrock
GEOMEAN
6.85
<50
300
62.2
460
<1
<0.025
1.1
<1
2164
1070
4.8
<1
<0.3
NA
MW-31BR
West of the WAB outside of CB
Bedrock
GEOMEAN
6.87
<50
322
34.5
387
<1
0.03
1.3
<1
59
370
0.95
1.7
2.5
NA
MW-32BR
West of the WAB outside of CB
Bedrock
GEOMEAN
7.60
<50
633
352
672
<1
0.05
1.7
<1
301
129
2.2
<1
0.34
NA
MW-33BR
West of the WAB outside of CB
lBedrock
Quarter 4
i2.49
<58
5280
2-9
i498
<4
0.23
<4
<}
<�
<5
�7._2
836
S
NA
RO-10-1
7391 Semora Road Semora NC 27343
lBedrock
I Quarter 2
7.10
<100
720
18
800
<2
NA
<1
1.9
510
840
1 <10
<5
4.2
NA
Prepared by: MAF Checked by: HEG
Notes:
Geometric means were calculated for wells with four or more valid sample results. Sample results were excluded if turbidity>10, pH>10 (for antimony, arsenic, chromium (total), molybdenum, selenium and vanadium only) and unusable data (RO qualified). For wells with datasets containing fewer than four valid results, the
most recent valid sample was used. All data is from 2018.
- Constituent concentration shown is most recent valid sample available due to insufficient dataset for geomean calculation.
12.40 Constituent concentration exceeds applicable comparison criteria.
32.49 Strike -through data is suspect due to elevated pH.
^ - Federal Maximum Contaminant Level (MCL)
* Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013.
< - concentration not detected at or above the adjusted reporting li NTU - Nephelometric turbidity unit
mg/L - Milligrams per liter
NA - Not Analyzed
NE - Not Established
S.U. - Standard Unit
pg/L - Micrograms per liter
pg/mL - micrograms per milliliter
Page 2 of 2

TABLE 3-6
CONSTITUENTS OF INTEREST EVALUATION
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC STATION
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Maximum 2018 Geomean
Concentration Near or
Number of Wells
Constituent of Interest
Comparison Criterion
Groundwater Zone Statistically Derived
Outside of Compliance
s
Exceedance Ratio
Above Criterion Near
Rationale for Exclusion from Mapping in Annual Report
(2017 CSA Update)
Background Valuer
Boundary
or Outside of
(mg/L)
Compliance Boundary
Constituents with 2L Criterion
Boron
700 (Ng/1)
Transition Zone: 50
1,444
2.1
3
Figure 3-11
Bedrock: 50
2715.39
3.9
5
Figure 3-12
Chromium (Total)
10 (Ng/1)
Transition Zone: 24.1
<1
0
0
No geomeans exceed comparative criteria
Bedrock: 3.61
2.8
0.28
0
No geomeans exceed comparative criteria
Iron
300 (Ng/1)
Transition Zone: 1173
96496
82.3
1
Does not exhibit a discernable plume.
Bedrock: 4227
2164
0.51
0
No geomeans exceed comparative criteria
Manganese
50 (Ng/1)
Transition Zone: 405
9129
22.5
3
Does not exhibit a discernable plume. Associated with potential additional source area.
Bedrock: 1198
1070
0.89
0
No geomeans exceed comparative criteria
Selenium
20 (Ng/1)
Transition Zone: 1.78
73.2
3.66
2
Does not exhibit a discernable plume.
Bedrock: 1
6.3
0.31
0
No geomeans exceed comparative criteria
Sulfate
250 (mg/1)
Transition Zone: 37
1222
4.89
5
Figure 3-13
Bedrock: 73.5
1373
5.49
6
Figure 3-14
Total Dissolved Solids
500 (mg/1)
Transition Zone: 540
1800
3.33
5
Figure 3-15
Bedrock: 530
2275
4.29
7
Figure 3-16 Elm&
Constituents with IMAC Criterion
Antimony
1 (lag/1)
Transition Zone: 1
<1
0
0
No geomeans exceed comparative criteria
Bedrock: 1
<1
0
0
No geomeans exceed comparative criteria
Cobalt
1 (lag/1)
Transition Zone: 1
7.3
7.3
3
Does not exhibit a discernable plume. Associated with potential additional source area.
Bedrock: 6.4
6.7
1.05
1
Does not exhibit a discernable plume.
Vanadium
0.3 (lag/1)
Transition Zone: 30.2
24.5
0.81
0
No concentrations greater than criterion
Bedrock: 2.49
15.6
6.25
3
Does not exhibit a discernable plume.
Background Criterion
Chromium (Hexavalent)
10 (lag/1)
Transition Zone: 16.1
0.05
0.01
0
No geomeans exceed comparative criteria
Bedrock: 0.19
0.05
0.01
0
No geomeans exceed comparative criteria
Molybdenum
NE
Transition Zone: 4.17
1.4
0.34
1
Does not exhibit a discernable plume.
Bedrock: 35.2
7.2
0.21
0
No geomeans exceed comparative criteria
Strontium
NE
Transition Zone: 760
1642
2.16
4
Associated with potential additional source area.
Bedrock: 99
1517
6.54
9
Occurs in high and variable concentrations in background. Associated with potential additional source area.
Uranium (Total)
NE
Transition Zone: 0.00516
1 0.000392
0.08
0
No geomeans exceed comparative criteria
Bedrock: 0.00324
1 0.039023844
12.04
1
Does not exhibit a discernable plume.
Notes:
1 - Background values shown reflect those accepted by NCDEQ in May 14, 2018 letter. These values are currently being updated for re -approval from NCDEQ in 2019.
2 - The following wells were used to calculate geomean concentrations at or near the compliance boundary: CCR-113D, CCR-113BR, CW-01, MW-01BR, CW-05, MW-05D, MW-05BR, GPMW-01D, GPMW-01BR, GPMW-02D, GPMW-02BR, GPMW-03D, GPMW-03BR, MW-03BR, MW-09BR, MW-22D, MW-22BR, MW-27BR, and MW-32BR.
3 - The exceedance ratio is the ratio of the observed constituent concentration divided by the reference criterion
NE - Not Established
Ug/L = micrograms per liter
mg/L = milligrams per liter
Highlighted value reference criterion
Prepared by: DAA Checked by: KTL
Page 1 of 1

TABLE 3-7
GROUNDWATER BACKGROUND THRESHOLD VALUES AND REGIONAL BACKGROUND CONCENTRATION RANGES
2018 CAMA ANNUAL INTERIM MONITORING REPORT
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
1
Constituent
Reporting
Unit
15A NCAC 02L
Standard
Background Threshold ValueS2
Constituent Concentration Ranges in
Background Wells
Constituent Concentration Ranges in
Big 6 Piedmont Background Wells
Transition
Zone
Bedrock
Flow Zone
Transition
Zone
Bedrock
Flow Zone
Shallow
Flow Zone
Deep
Flow Zone
Bedrock
Flow Zone
pH
S.U.
6.5-8.5
6.3-7.6
6.8-8.3
6.3-7.6
6.1-8.4
4.0-7.8
3.8-8.5
4.5-8.5
Antimony
pg/L
1*
1
1
<1
<1
<0.5 - 1.4
<0.5 - 2.56
<0.5 - 1.4
Boron
pg/L
700
50
50
<50
<50
<50
<50
<50
Chromium
pg/L
10
25
4
1.26 - 19.5
<1 - 5.15
<0.5 -14.1
<0.5 - 19.5
<0.5 - 11.3
Chromium (VI)
pg/L
NE
17
0.2
0.26 - 12.2
<0.025 - 0.24
<0.025 - 7.1
<0.025 - 12.2
<0.025 - 8
Cobalt
pg/L
1*
1
6
<1
<1 - 21.7
<0.1 - 17.3
<0.1 - 6.1
<0.1 - 21.7
Iron
pg/L
300
1210
4227
12 - 811
<10 - 5570
<50 - 6820
<50 - 3200
<50 - 8730
Manganese
mg/L
50
405
1198
<5 - 316
<5 - 1510
<5 - 780
<5 - 408
<5- 1510
Molybdenum
pg/L
NE
4
35
<1 - 6.61
<1 - 24.3
<0.5 - 10.7
<0.5 - 30.2
<0.5 - 24.3
Selenium
fag/L
20
2
1
<1
<1
<0.5 - 0.72
<0.5 - 2.9
<0.5 - 2.82
Strontium
fag/L
NE
760
232
221 - 782
64 - 458
<5 - 309
<5 - 782
<5 - 458
Sulfate
fag/L
250
37
74
17 - 48.1
0.18 - 77
<1 - 12.8
<1 - 48.1
<1 - 140
TDS
pg/L
500
540
530
310 - 750
170 - 820
<25 -164
<25 - 750
<25 - 820
Total Uranium
pg/mL
0.03^
0.005
0.003
<0.0002 - 0.00501
<0.0002 - 0.00605
<0.0002 - 0.000217
<0.0002 - 0.00501
<0.0002 - 0.00605
Vanadium
pg/L
0.3*
30
2
0.551 - 24.4
<0.3 - 3.03
<0.3 - 15.4
<0.3 - 24.4
<0.3 - 26.6
Notes:
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013
^ - Federal maximum contaminant level (MCL) for drinking water
pg/L - micrograms per liter
pg/mL - micrograms per milliliter
1 - Indicates that BTVs were calculated for constituents identified as a COI in the 2018 CSA Update (January 2018)
Z - Indicates that BTVs were calculated using data from background groundwater samples collected June 2015 to March 2017
BTV - Background Threshold Value
BTVs represent Upper Tolerance Limits (UTLs) calculated from background datasets
COI - Constituent of Interest
CSA - Comprehensive Site Assessment
mg/L - milligrams per liter
NCAC - North Carolina Administrative Code
NE - Not Established
S.U. - Standard Units
TDS - Total Dissolved Solids
Prepared by: JHG/HEb Checked by: WCG/HLG
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