NC0003425_Discharge Canals Work Plan_20160818 (2)

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synTerra
ASH BASIN EXTENSION IMPOUNDMENTS AND
DISCHARGE CANALS
ASSESSMENT WORK PLAN
FOR
ROXBORO STEAM ELECTRIC PLANT
1700 DUNNAWAY ROAD
SEMORA, NORTH CAROLINA 27343
NPDES PERMIT #NC0003425
N 36.484825 / W -79.072315
SUBMITTED: AUGUST 2016
PREPARED FOR
DUKE ENERGY PROGRESS,, LLC
410 S. WILMINGTON STREET
RALEIGHj, NORTH CAROLINA 27601
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PROGRESS
PREPARED BY
SYNTERRA
148 RIVER STREETy SUITE 220
GREENVILLEj, SOUTH CAROLINA 29601
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Ash Basin Extension Impoundments and Discharge Canals Assessment Work Plan August 2016
Roxboro Steam Electric Plant SynTerra
TABLE OF CONTENTS
SECTION
PAGE
ExecutiveSummary.............................................................................................................. ES -1
1.0 Introduction..................................................................................................................1-1
2.0 Site Information........................................................................................................... 2-1
2.1
Plant Description.....................................................................................................
2-1
2.2
Ash Basin Description............................................................................................
2-1
2.3
Regulatory Requirements......................................................................................
2-2
2.4
Compliance Boundary............................................................................................
2-4
2.5
Receptor Information.............................................................................................
2-4
2.6
Risk Assessment......................................................................................................2-4
4-1
3.0
Regional Geology and Hydrogeology.....................................................................
3-1
3.1
Regional Geology....................................................................................................3-1
5-4
3.2
Regional Hydrogeology.........................................................................................
3-2
3.3
Site Hydrogeology..................................................................................................
3-2
4.0
Site Conceptual Model................................................................................................4-1
5-6
4.1
Source Characteristics............................................................................................
4-1
4.2
Additional Assessment Activities........................................................................
4-1
4.2.1 East Ash Basin Extension Impoundment Investigation ..............................
4-1
4.2.2 West Ash Basin Extension Impoundment Investigation ............................
4-3
5.0
Assessment Work Plan................................................................................................5-1
5.1
Wastewater Samples...............................................................................................5-1
5.2
Sediment Samples...................................................................................................
5-2
5.3
Groundwater Samples............................................................................................5-2
5.4
Field and Sampling Quality Assurance/Quality Control Procedures.............5-3
5.4.1
Field Logbooks..................................................................................................
5-3
5.4.2
Field Data Records............................................................................................
5-4
5.4.3
Sample Identification........................................................................................
5-4
5.4.4
Field Equipment Calibration...........................................................................5-4
5.4.5
Sample Custody Requirements.......................................................................
5-6
5.4.6
Quality Assurance and Quality Control Samples ........................................
5-7
5.4.7
Decontamination Procedures..........................................................................
5-8
6.0 Modeling of Groundwater Impacts to Surface Water .......................................... 6-1
7.0 Extension Impoundment and Discharge Canal Assessment Report ................. 7-1
8.0 Proposed Schedule.......................................................................................................8-1
9.0 References......................................................................................................................9-1
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Ash Basin Extension Impoundments and Discharge Canals Assessment Work Plan August 2016
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LIST OF FIGURES
Figure 1-1 Site Location Map
Figure 1-2 Site Layout Map
Figure 2-1 Water Well Survey Map
Figure 4-1 Sample Location Map - EAB Eastern Extension Impoundment
Figure 4-2 Sample Location Map - WAB Southern Extension Impoundment
Figure 5-1 Sample Location Map - EAB EEI Eastern Discharge Canal
Figure 5-2 Sample Location Map - WAB SEI Western Discharge Canal
LIST OF TABLES
Table 2-1 Water Supply Well Property Owners Information
Table 5-1 Wastewater Parameters and Analytical Methods
Table 5-2 Sediment Parameters and Analytical Methods
Table 5-3 Groundwater Parameters and Analytical Methods
LIST OF APPENDICES
Appendix A NPDES Permit NC0003425
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ACRONYMS
CAP
Corrective Action Plan
CCR
Coal Combustion Residuals
CSA
Comprehensive Site Assessment
DEP
Duke Energy Progress, LLC
DFA
Dry Fly Ash
DO
Dissolved Oxygen
DWR
Division of Water Resources
EAB
East Ash Basin
EEI
Eastern Extension Impoundment
FDR
Field Data Record
FGD
Flue Gas Desulfurization
IMAC
Interim Maximum Allowable Concentrations
NCDENR
North Carolina Department of Environment and Natural Resources
NCDEQ
North Carolina Department of Environmental Quality
NPDES
National Pollutant Discharge Elimination System
ORP
Oxidation -Reduction Potential
PLM
Polarized Light Microscopy
QA/QC
Quality Assurance/Quality Control
SCM
Site Conceptual Model
SEI
Southern Extension Impoundment
TDS
Total Dissolved Solids
TSS
Total Suspended Solids
WAB
West Ash Basin
USGS
United States Geological Survey
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Ash Basin Extension Impoundments and Discharge Canals Assessment Work Plan August 2016
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EXECUTIVE SUMMARY
Duke Energy Progress, LLC (Duke Energy, DEP) owns and operates the Roxboro Steam
Electric Plant (the Roxboro Plant, Plant or Site) located at 1700 Dunnaway Road in
Semora, Person County, North Carolina. Roxboro Plant began operations in 1966 as a
coal-fired electrical generating station with additional generating units added in 1968,
1973, and 1980, with a combined electric generating capacity of 2,422 megawatts. Coal
combustion residuals (OCRs) have historically been managed at the Plant's two on-site
ash basins: the semi -active East Ash Basin (EAB), which began operations from the mid-
1960s to present, and the active West Ash Basin (WAB), which started operations from
the early 1970s to present. CCRs were initially deposited in the EAB by hydraulic
sluicing operations until the Plant was modified for dry fly ash (DFA) handling in the
1980s. An unlined landfill was constructed on top of the East Ash Basin for the
placement of the DFA. A lined ash landfill was constructed in phases over the unlined
landfill beginning in 2004. Most of the fly ash material produced at the facility is
currently collected by dry handling operations and are disposed within the lined ash
landfill of the EAB or transported offsite for beneficial reuse. The WAB was constructed
in 1973 and received bottom ash by hydraulic sluicing methods through present day.
The East Ash Basin eastern extension impoundment (EEI) is a remnant of the East Ash
Basin, encompassing approximately 9.4 acres, which has potentially accumulated ash
directly from former sluicing operations and secondarily through eolian (wind-blown)
deposition. A discharge canal from the EAB was constructed as part of the original ash
basin development and provided direct discharge of ash basin wastewater and
secondary surface water runoff from adjacent streams to the intake canal from Hyco
Reservoir. The EEI and the discharge canal were separated from the EAB in the mid-
1980s, when an earthen dam (EAB Separator Dike) was constructed to accommodate
development of the unlined DFA landfill on top of the EAB.
The West Ash Basin was created in 1973 and expanded in 1986 when the 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 basin 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 at the southern end of
the WAB basin to create a secondary settling basin and to isolate the major portion of
the ash basin. The West Ash Basin southern extension impoundment (SEI) is a former
part of the West Ash Basin located south of the filter dike (Dike #1) and is comprised of
several "fingers" encompassing approximately 38.5 acres. The SEI has potentially been
impacted by ash from the WAB before the filter dike was constructed.
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The discharge canal receives waste streams from various on-site sources including:
WAB effluent from bottom ash sluicing; landfill drainage and runoff from the EAB
lined landfill; storm water runoff from the two ash basins; wastewater discharge from
the Flue Gas Desulfurization (FGD) Pond wastewater treatment process; cooling tower
blowdown; domestic sewage treatment plant discharge; and surface water runoff.
Effluent from the discharge canal passes through the National Pollutant Discharge
Elimination System (NPDES) Internal Outfall 002 with discharge into the heated water
discharge pond, which ultimately flows into Hyco Reservoir through NPDES Outfall
003.
In a letter dated July S, 2016, the North Carolina Department of Environmental Quality
(NCDEQ) Water Resources Section requested that Duke Energy provide data and
conduct additional site assessment as needed to characterize CCR materials in the EEI
and SEI impoundments and their discharge canals. In addition to performing site
assessment activities, a revision to waste boundaries and proposed compliance
boundaries, per 15A NCAC 02L Section .0107, are proposed herein as requested.
This work plan includes the following:
101 Descriptions of the Roxboro Plant, the coal ash basins, extension impoundments
and their discharge canals;
,0 NPDES permit NC0003425 and a summary of regulatory requirements under the
NPDES program;
4' A proposed revised CCR waste boundary and compliance boundary map;
10 A summary of receptor information presented in the Comprehensive Site
Assessment (CSA) Report and the baseline human health and ecological risk
assessment presented in Corrective Action Plan (CAP) Part 1 Report;
41, A description of the regional geology and hydrology;
01 A site conceptual model including details of previous assessment activities
conducted at the EEI and SEI; and
411 Proposed assessment activities including wastewater and sediment sampling in
the discharge canals and groundwater sampling from existing and proposed
groundwater monitoring wells at strategic locations associated with the
extension impoundments and the discharge canals.
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The proposed assessment activities will be conducted in general conformance with the
CSA Work Pan, Rev. 1, December 2014. Fieldwork for the proposed assessment
activities will commence within approximately 45 days following NCDEQ final
approval of this work plan. The information obtained through this Work Plan will be
used to prepare a CSA Supplemental Report 2 that presents field observations,
analytical data, revisions to the site conceptual model, and conclusions regarding the
assessment findings. The CSA Supplemental Report 2 will be submitted to NCDEQ
within approximately 60 days following receipt and validation of all analytical data.
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Ash Basin Extension Impoundments and Discharge Canals Assessment Work Plan August 2016
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1.0 INTRODUCTION
Duke Energy Progress, LLC (Duke Energy, DEP) owns and operates the Roxboro Steam
Electric Plant (the Roxboro Plant, Plant or Site) located at 1700 Dunnaway Road in
Semora, Person County, North Carolina (Figure 1-1). Roxboro Plant began operations
in 1966 as a coal-fired electrical generating station with additional generating units
added in 1968, 1973, and 1980, with a combined electric generating capacity of 2,422
megawatts. CCRs have historically been managed at the Plant's two on-site ash basins:
the semi -active East Ash Basin, which began operations from the mid-1960s to present,
and the active West Ash Basin, which started operations from the early 1970s to present
(Figure 1-2). CCRs were initially deposited in the EAB by hydraulic sluicing operations
until the Plant was modified for dry fly ash handling in the 1980s. An unlined landfill
was constructed on top of the East Ash Basin for the placement of the DFA. A lined ash
landfill was constructed in phases over the unlined landfill beginning in 2004. Most of
the fly ash material produced at the facility is currently collected by dry handling
operations and are disposed within the lined ash landfill of the EAB or transported
offsite for beneficial reuse. The WAB was constructed in 1973 and still receives bottom
ash by hydraulic sluicing methods.
The East Ash Basin eastern extension impoundment is a remnant of the East Ash Basin,
encompassing approximately 9.4 acres, which has potentially accumulated ash directly
from former sluicing operations and secondarily through eolian (wind-blown)
deposition. The West Ash Basin southern extension impoundment is a former part of
the West Ash Basin located south of the filter dike (Dike #1) and is comprised of several
"fingers" encompassing approximately 38.5 acres. The SEI has potentially been
impacted by ash from the WAB before the filter dike was constructed.
In a letter dated July 8, 2016, NCDEQ Division of Water Resources (DWR) Section
requested that Duke Energy provide data and conduct additional site assessment as
needed to characterize CCR materials in the EEI and SEI impoundments and their
discharge canals. In addition to performing site assessment activities, DWR requested a
revision to waste boundaries and proposed compliance boundaries, per 15A NCAC 02L
Section .0107. The ash basin extension impoundment and discharge canal assessments
will supplement the on-going Roxboro Plant Comprehensive Site Assessment.
Similarly, this Assessment Work Plan is a standalone update to the Roxboro Plant CSA
Groundwater Assessment Work Plan, Rev. 1, (SynTerra, December 2014). The
information obtained following execution of this Work Plan will be presented in a CSA
supplemental report.
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2.0 SITE INFORMATION
2.1 Plant Description
The Roxboro Plant is located approximately 10 miles northwest of the City of Roxboro,
North Carolina. The Plant is located on approximately 6,095 acres between McGhees
Mill Road to the east and Hyco Reservoir, a lake formed from the impoundment of the
Hyco River, to the west. The Site is developed with the power plant structures, ash
management areas and associated canals. The power plant structures are located
primarily on the north side of the Site near the Hyco Reservoir and the ash management
areas are located generally south of the power plant buildings. Land beyond the ash
management areas to the east, south and west are wooded and transected by
transmission lines. The Hyco Reservoir borders the Site to the west and north.
The approximate size of the combined ash basins is 220 acres with a total estimated ash
inventory in both ash basins of 19,500,000 tons. The landfill ash inventory in the lined
and unlined landfills is estimated to be 7,320,000 tons. Ash fill areas, including the
structural fill under the gypsum pad, contain an estimated 7,800,000 tons. The total
estimated CCR at the Roxboro facility is approximately 34,620,000 tons
(https://www.duke-energy.com/pdfs/duke-energy-ash-metrics.pdf, updated June 2,
2016). Currently, the East Ash Basin and lined landfill are covered with vegetation
where the landfill is inactive. The West Ash Basin has some grass cover and ponded
water, mostly along the southern and eastern edges of the basin.
2.2 Ash Basin Description
The East Ash Basin was originally developed in 1964 with the construction of an
earthen dam, to the southeast of the main plant, in a former stream channel. A
discharge canal from the EAB was constructed as part of the original ash basin
development and provided direct discharge of ash basin wastewater and secondary
surface water runoff from adjacent streams to the intake canal of the Hyco Reservoir.
The discharge was initially regulated under NPDES Permit #0003425 through internal
Outfall #001. In 1994, the NCDEQ (former NC Department of Environment and Natural
Resources (NCDENR)) no longer required discharge from the canal to be monitored
under NPDES regulations. The former outfall location is currently under consideration
for reinsertion into the NPDES permit
In the mid-1980s, an earthen separator dike was constructed on the eastern portion of
the EAB to allow development of the overlying unlined landfill. The separator dike
formed a barrier separating the EAB from the discharge canal and a portion of the
former basin, creating the 9.4 acre eastern extension impoundment. Based on historical
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information, the EEI and discharge canal likely received ash directly from the former
sluicing operations and, secondarily, through eolian (wind-blown) deposition.
The West Ash Basin was created in 1973 with the construction of earthen dam (main
dam) in a former stream channel to the southwest of the main plant. The main dam is
an earth fill embankment with a central earth core constructed between two cofferdams
over a prepared rock foundation with a central core keyway excavated 10 feet into rock.
In 1986, the 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 at the southern end
of the WAB to create a secondary settling basin and to isolate the major portion of the
ash basin. Dikes #2, 3, and 4 were placed in topographic low areas along the excavated
discharge canal on the west side of the WAB. The dikes were constructed by end -
dumping soil fill from the excavated discharge canal and were supported with stone
berms (buttresses), approximately 20 to 30 feet thick, on the downstream side of the
dikes (AMEC Foster Wheeler, 2015).
The discharge canal receives waste streams from various on-site sources including:
WAB effluent from bottom ash sluicing; landfill drainage and runoff from the EAB
lined landfill; storm water runoff from the two ash basins; wastewater discharge from
the Flue Gas Desulfurization Pond wastewater treatment process; cooling tower
blowdown; domestic sewage treatment plant discharge; and surface water runoff.
Effluent from the discharge canal passes through NPDES Internal Outfall #002 with
discharge into the heated water discharge pond, which ultimately flows into Hyco
Reservoir through NPDES Outfall# 003.
The West Ash Basin southern extension impoundment is a former part of the West Ash
Basin located south of the filter dike (Dike #1) of the West Ash Basin. The SEI is
comprised of several "fingers" encompassing approximately 38.5 acres. The SEI has
likely received ash from the WAB before the rock filter dike was constructed.
2.3 Regulatory Requirements
The NPDES program regulates wastewater discharges to surface waters. The Site is
permitted to discharge wastewater under NPDES Permit NC0003425, which authorizes
discharge from the facility to Hyco Reservoir in accordance with effluent limitations,
monitoring requirements, and other conditions set forth in the permit (Appendix A).
Surface water monitoring has been conducted since the NPDES permits have been
issued.
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The permit authorizes discharges from the ash basin treatment system at Outfall #003
and the coal pile runoff treatment system at Outfall #006. These outfalls discharge to
the Hyco Reservoir. Several internal outfall discharges are also authorized via Outfall
#003 including: the ash basin treatment system (Internal Outfall #002), the cooling tower
blowdown system (Internal Outfall #005), coal pile runoff treatment system (Internal
Outfall #006); the domestic wastewater treatment system (Internal Outfall #008), the
chemical metal cleaning treatment system (Internal Outfall #009) and the flue gas
desulfurization treatment system (Internal Outfall #010).
Effluent discharge from the various waste streams enter the Hyco Reservoir through
Outfall #003. In accordance with the NPDES permit, effluent is monitored for total
residual chlorine (twice monthly); total phosphorus (monthly); total nitrogen (monthly),
temperature (continuous); total arsenic (monthly), pH (weekly) and acute toxicity
(quarterly).
In addition to surface water monitoring, the NPDES permit requires groundwater
monitoring. The current groundwater compliance monitoring plan under the NPDES
Permit includes the sampling of eight monitoring wells which includes one background
well (BG -1) and seven downgradient wells (CW -1, CW -2/2D, CW -3/3D, CW -4, and CW -
5) (Figure 1-2). The NPDES compliance groundwater monitoring wells are sampled
three times a year with analytical results submitted to the NCDEQ DWR.
Duke Energy conducts routine compliance monitoring during April, July, and
November each year for the following current list of parameters:
Laboratory Parameters
Alkalinity, Aluminum, Antimony, Arsenic, Barium, Beryllium, Bicarbonate,
Boron, Cadmium, Calcium, Carbonate, Chloride, Chromium, Cobalt, Copper,
Iron, Lead, Magnesium, Manganese, Mercury, Molybdenum, Nickel, Nitrate,
Potassium, Selenium, Sodium, Strontium, Sulfate, Thallium, Total Dissolved
Solids (TDS), Total Suspended Solids (TSS), Vanadium, and Zinc.
Field Measured Parameters
Dissolved Oxygen (DO), Oxidation -Reduction Potential (ORP), pH, Specific
Conductance, Temperature, Turbidity, and Water Level.
The most current NPDES groundwater monitoring data is presented in the CSA
Supplement 1 (SynTerra, August 1, 2016).
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2.4 Compliance Boundary
The compliance boundary for the Site ash basins is defined in accordance with Title15A
NCAC 02L .0107(a) as being established at either 500 feet from the ash basin waste
boundary or at the property boundary, whichever is closer to the waste. Sediment
sampling conducted in the ash basin extension impoundments in August 2015 revealed
the potential for CCR material to be present. Therefore, a revision to the ash basin
waste boundary and the proposed CCR impoundment compliance boundary are
presented on Figure 1-2.
2.5 Receptor Information
SynTerra has conducted a receptor survey to identify potential receptors including
public and private water supply wells (including irrigation wells and unused or
abandoned wells) and surface water features within a 0.5 -mile radius of the Roxboro
Plant ash basin compliance boundary. The receptor survey was provided in a
September 2014 report with a supplement report, incorporating property owner
questionnaires, delivered in November 2014.
Based on revisions to ash basin waste boundary and the proposed CCR impoundment
compliance boundary, an updated receptor survey was initiated by Duke Energy in July
2016. The receptor survey involved a vehicle survey on public roads within the 0.5 mile
radius area of the revised compliance boundary of the CCR impoundments. Residential
properties using water supply wells are located on McGhees Mill Road, The Johnson
Lane, Archie Clayton Road, Daisy Thompson Road, Semora Road (NC Highway 57)
and Dunnaway Road within the half -mile radius of the revised CCR impoundment
compliance boundary. Though a water supply well is located at the CertainTeed
building materials manufacturing facility, approximately 2,500 feet northeast of the ash
basins, the well is located beyond the intake canal of the Hyco Reservoir, which serves
as a body of water that would prevent migration of contaminants through groundwater
from the basin to the well per House Bill 630 [130A-309.211(cll)]. A map depicting
water supply wells within the 0.5 -mile radius of the revised CCR impoundment
compliance boundary is provided in Figure 2-1 with updated property owner
information summarized in Table 2-1.
2.6 Risk Assessment
Screening level human health and ecological risk assessments were conducted during
the CSA and the results are presented in Section 12.0 of the CSA Report (SynTerra,
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September 2015). Human health and ecological baseline risk assessments were
subsequently conducted and the results were presented in Section 5.0 of the Corrective
Action Plan Part 2 (SynTerra, February 2016). The human health and ecological risk
assessment found no imminent threat to humans or the environment as part of the
scope of the assessment for the Roxboro Plant.
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3.0 REGIONAL GEOLOGY AND HYDROGEOLOGY
The Roxboro Plant is situated in the eastern Piedmont Region of north -central North
Carolina. The Piedmont is characterized by well-rounded hills and rolling ridges cut by
small streams and drainages. Elevations in the area of the Roxboro Plant range between
410 feet above mean sea level (msl) during full pool at Hyco Reservoir to 570 feet msl
near the Dunnaway Road and McGhees Mill Road intersection southeast of the Plant.
Geologically, the Plant is located near the contact of two regional geologic zones: the
Inner Piedmont zone and the Carolina zone. Both zones are generally comprised of
igneous and metamorphosed igneous and sedimentary rocks of Paleozoic age. In
general, the rocks are highly fractured and folded and have been subjected to long
periods of physical and chemical weathering. The origination, genesis, and
characteristics of the rocks of the region have been the focus of detailed study by
researchers for many years. These investigations have resulted in a number of
interpretations and periodic refinements to the overall geological model of the region.
3.1 Regional Geology
Rocks of the region, except where exposed in road cuts, stream channels, and steep
hillsides, are covered with unconsolidated material formed from the in-situ chemical
and physical breakdown of the bedrock. This unconsolidated material is referred to as
saprolite or residuum. Direct observations at the Site confirm the presence of saprolite,
developed above the bedrock, which is generally 10 to 30 feet thick. The residuum
extends from the ground surface (soil zones) downward, transitioning through a zone
comprised of unconsolidated silt and sand, downward through a transition zone of
partially weathered rock in a silt/sand matrix, down to the contact with competent
bedrock.
The Geologic Map of North Carolina (1985) places the rocks of the Plant area in the
Charlotte Terrane: a belt of metamorphic rock trending generally southwest to
northeast characterized by strongly foliated felsic mica gneiss and schist and
metamorphosed intrusive rocks. The rocks of the area near the Plant are described as
biotite gneiss and schist with abundant potassic feldspar and garnet, and interlayered
and gradational with calcic -silicate rock, sillimanite-mica schist and amphibolite. The
gneiss contains small masses of granite rock. The felsic mica gneiss of the Charlotte
Terrane is described as being interlayered with biotite and hornblende schist. Later
mapping generally confirms these observations and places the Roxboro Plant near the
contact between the Inner Piedmont zone, characterized by the presence of biotite
gneiss and schist, and the Charlotte Belt (or Charlotte Terrane), characterized by felsic
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mica gneiss (USGS, 2007). A detailed description of the regional geology is presented in
Section 5.1 of the CSA Report (SynTerra, September 2015).
3.2 Regional Hydrogeology
Groundwater within the Site area exists under unconfined, or water table, conditions
within the residuum and/or saprolite zone and in fractures and joints of the underlying
bedrock. The water table and bedrock water -bearing zones are interconnected. The
saprolite, where saturated thickness is sufficient, acts as a reservoir for supplying
groundwater to the fractures and joints in the bedrock. Shallow groundwater generally
flows from local recharge zones in topographically high areas, such as ridges, toward
groundwater discharge zones, such as stream valleys. Ridge and topographic high
areas serve as groundwater recharge zones, and groundwater flow patterns in recharge
areas tend to develop a somewhat radial pattern from the center of the recharge area
outward toward the discharge areas and are expected to mimic surface topography.
3.3 Site Hydrogeology
The position, geometry, topography, and hydrogeologic character of the ash basins, the
former stream valleys to the Hyco River in which the basins were constructed, and
Hyco Reservoir are the primary influences on groundwater flow and constituent
transport at the Site. The former natural drainage features generally trend southeast to
northwest across the site. The ash basins are separated by a northwest -southeast
trending topographic ridge. Groundwater flow across the site is generally from upland
areas south and southeast (recharge areas) toward Hyco Reservoir which is situated to
the north/northwest. Localized areas of groundwater discharge to surface water occur
from the two ash basins and the topographic ridge separating the basins. Further
influences to groundwater flow include the earthen impoundments (dams and
separator dikes) creating the basins; the intake canal (north of the EAB); the discharge
canals; and the heated water discharge pond. A generalized water level map for the
bedrock aquifer, including the saprolite and transition zone hydrogeologic units,
incorporating the June 14, 2016 CSA and the April 6-7, 2016 NPDES compliance
measurements, is provided in the CSA Supplement 1 (SynTerra, August 1, 2106).
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4.0 SITE CONCEPTUAL MODEL
Hydrogeologic and geochemical site conceptual models (SCMs) were developed for the
coal ash basins and presented in Section 6.0 of the CSA Report (SynTerra, September
2015) and revised, based on fate and transport modeling, in the CAP Part 1 (SynTerra,
December 2015). A refined SCM was presented in the CAP Part 2 (SynTerra, February
2016) based on the updated fate and transport and geochemical modeling. Additional
site specific geologic, hydrogeologic and geochemical information was presented in the
CSA Supplement 1 (SynTerra, August 2016). The SCM will continue to be refined as
additional site-specific information is obtained from the impoundment and discharge
canal assessment process.
4.1 Source Characteristics
The focus of the impoundment assessments is whether coal ash is present in the
extension impoundments and discharge canals. The physical and chemical
characteristics of coal ash is detailed in Sections 3.2 and 3.3 of the CSA Report
(SynTerra, September 2015).
4.2 Additional Assessment Activities
Additional assessment activities (i.e., "data gap" activities) identified in the CSA report
and detailed in the CAP Part 2 were addressed and the findings were discussed in the
CSA Supplement 1 report (SynTerra, August 1, 2016). Data gap activities included an
investigation of the Ash Basin extension impoundments.
4.2.1 East Ash Basin Extension Impoundment Investigation
SynTerra was retained to evaluate the wastewater, sediment and groundwater
quality conditions associated with the EAB EEI. SynTerra conducted wastewater
and sediment sampling of the EEI on April 26-27, 2016 and installed and
sampled groundwater monitoring wells in June 2016.
Four shallow wastewater samples (CL -2S, CL -5S, CV -2 and CL -7) and two deep
wastewater samples (CL -2 and CL -5) were collected (Figure 4-1). Sample
locations were accessed using an inflatable boat following DEP-approved boat
safety protocol. The shallow wastewater samples were collected from the top
foot of the water column. Deep wastewater samples were collected using a
peristaltic pump with weighted tubing approximately two feet from the bottom
of the water column. The wastewater samples were analyzed for CSA
parameters and results compared to NCAC surface water (2B) values. However,
it should be noted that the impoundment is part of the ash basin and is not
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considered waters of the state. Therefore, the 213 comparisons were for
informational purposes only.
The analytical results indicated copper and lead were detected at concentrations
greater than the surface water 2B ecological standard. Dissolved oxygen (DO)
exceeded the 213 ecological standard in all locations with the exception of one
deep wastewater location (CL -5). Analytical summary tables and laboratory
analytical reports were provided in the CSA Supplement 1 report.
Four shallow sediment samples (NL -8, SL -8, CV -2, and NL -4) and five deeper
sediment cores (CL -2, CL -4, CL -6, CV -1, and CL -7) were collected (Figure 4-1).
Shallow sediment was collected from the top six inches of the sediment using a
Ponar dredge. Intact core samples were collected using a direct push barge
mounted GeoProbe with core samples collected to probe refusal. Ash of variable
thickness was observed in the surficial and core sediment samples. The sediment
samples were analyzed for CSA parameters and compared to the USEPA Region
4 Freshwater Sediment Ecological Screening Values (ESV).
Analytical results revealed arsenic, barium, copper, iron and manganese
concentrations were greater than the ESV in one or more surficial and core
sediment samples. The sediment constituent concentration exceedances are
similar to previous sediment detections presented in the CAP Part 1. The SPLP
leaching test was used on the sediment samples to assess if the metals present in
sediment may leach to groundwater. For the shallow sediment samples, cobalt,
manganese and vanadium were detected greater than the 2L or IMAC in the
leachate. In the deep sediment samples, antimony, arsenic, chromium, cobalt,
iron, manganese, thallium and vanadium were detected greater than the 2L or
IMAC in the leachate. With the exception of antimony and thallium in the deep
sediment samples, the SPLP analysis for sediment samples from the EEI are
consistent with SPLP analysis of soil, including background locations, presented
in the CSA. Analytical summary tables and laboratory analytical reports were
provided in the CSA Supplement 1 report.
Three groundwater monitoring wells, MW-23BR, MW-24BR and MW-25BR, were
installed around the EEI impoundment to evaluate groundwater conditions in
the upper bedrock (Figure 1-2). The monitoring wells were strategically
positioned, within the physical constraints of topography and overhead electrical
transmission lines, to assess groundwater quality near the EEI. The wells were
installed on June 6-8, 2016 by Geologic Exploration (GeoEx) of Statesville, NC.
Each boring was drilled to the first measurable water bearing fracture (> 1 gpm)
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in the upper bedrock, which varied from 109 feet below ground surface (bgs)
(MW-25BR), 126 feet bgs (MW-23BR), and 152 feet bgs (MW-24BR). Saturated
conditions were not encountered within the saprolite/partially weathered rock
materials overlying the granitic gneiss bedrock. The boring logs with lithologic
descriptions and well information were included in Appendix C of the CSA
Supplement 1 report.
Following well development, groundwater samples were collected from the EEI
impoundment wells on June 16-17, 2016 for CSA parameters and compared to 2L
and IMAC values. Analytical results indicated that several constituents were
detected above the 2L or IMAC in one or more of the wells including antimony,
total chromium, iron, manganese, TDS, and vanadium. With the exception of
antimony in MW-23BR and total chromium and TDS in MW-25BR, none of the
detected constituents were above the provisional background concentrations.
Boron was not detected in any of the groundwater samples suggesting the ash
present in the EEI has not impacted the groundwater in the upper bedrock
aquifer. Analytical summary tables and laboratory analytical reports were
provided in the CSA Supplement 1 report.
4.2.2 West Ash Basin Extension Impoundment Investigation
SynTerra assessed the WAB SEI wastewater and sediment quality similar to the
EAB EEI from July 18-21, 2016 and installed and sampled a groundwater
monitoring well in June 2016.
Six shallow wastewater samples (WF -2S, WF -4S, CF -2S, CF -4S, EF -2S and EF -4S)
and six deep wastewater samples (WF -2D, WF -4D, CF -2D, CF -4D, EF -2D and EF -
4D) were collected (Figure 4-2). Sample locations were accessed using a jon boat
following DEP-approved boat safety protocol. The shallow wastewater samples
were collected from the top foot of the water column. Deep wastewater samples
were collected using a peristaltic pump with weighted tubing approximately two
feet from the bottom of the water column. The wastewater samples were
analyzed for CSA parameters. The analytical data is yet not available and will be
provided in a supplement CSA report.
Seven sediment samples (EF -1, EF -3, WF -1, WF -3, CF -1, CF -3 and CF -5) were
collected using a direct push barge mounted GeoProbe with core samples
collected to probe refusal (Figure 4-2). Ash of variable thickness from 1 to 5 feet
was observed in the core sediment samples. The sediment samples were
analyzed for CSA parameters. The analytical data is yet not available and will be
provided in a supplement CSA report.
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One groundwater monitoring well, MW-26BR, was installed near the eastern
side of the eastern finger of the SEI (Figure 1-2). The well was positioned to
evaluate groundwater quality in the upper bedrock in that area nearest to the
residential water supply wells located on Dunnaway Road. The MW-26BR
borehole was drilled by GeoEx on June 7-8, 2016. The boring was installed to 84
feet bgs with saprolite/partially weathered rock encountered at 11 feet bgs
followed by granitic gneiss. A water bearing fracture (> 1 gpm) was encountered
at 82 feet bgs. MW-26BR was completed with a 10 -foot pre -packed screen placed
across the fracture zone. The boring log with lithologic descriptions and well
information is included in Appendix C of the CSA Supplement 1 report.
Following well development, a groundwater sample was collected from MW-
26BR on June 17, 2016 for CSA parameters and compared to 2L or IMAC. The
summarized analytical data and laboratory analytical reports were included in
Appendix B of the CSA Supplement 1 report.
The analytical data indicated iron, manganese, TDS and vanadium were detected
above 2L or IMAC but below the provisional background concentrations. No
boron was detected above the method detection limit. The analytical data is
similar in constituent distribution and concentration in MW-15BR, located on the
western side of the impoundment, and MW-18BR, located to the southeast of the
impoundment. With the detection of few constituents above 2L or IMAC, none
above provisional background concentrations, and the lack of boron suggests the
WAB SEI has not impacted the groundwater in the upper bedrock to the east,
southeast and west of the impoundment.
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5.0 ASSESSMENT WORK PLAN
The scope of work discussed in this plan is designed to meet the requirements of 15A
NCAC 02L .0106(g) as it pertains to the assessment of the ash basin extension
impoundments and discharge canals. The proposed assessment activities will be
conducted to augment previous investigative activities of the impoundments as
discussed in Section 4.2. Aqueous and solid media sampling will be performed to
determine presence or absence of coal ash in the discharge canals. Discharge canal
assessment wastewater and sediment sampling is discussed in Sections 5.1 and 5.2,
respectively. Groundwater sampling from strategic locations associated with the
impoundments and the discharge canals is discussed in Section 5.3. Field and sampling
quality assurance and quality control procedures are discussed in Section 5.4.
5.1 Wastewater Samples
Grab wastewater samples from the discharge canals will be collected directly into
sample bottleware provided by the analytical laboratory. The bottleware will be gently
lowered into the water until a portion of the sample bottleware mouth is just below the
water surface. The aqueous media samples should not contain surface debris (e.g.,
leaves, grass, and surface sheen). Bottleware containing a preservative (e.g., acid) will
be filled with the grab wastewater sample collected in bottleware that does not contain
a preservative. Wastewater samples may be collected from a boat or samplers standing
on the shoreline depending upon the proposed sampling location and accessibility.
The following grab wastewater samples will be collected in support of the EAB EEI
discharge canal (Figure 5-1) and the WAB SEI discharge canal (Figure 5-2) assessment:
,67 Five grab wastewater sample locations (EDC -1 through EDC -5) will be
collected from the EEI discharge canal; and
47 Six grab wastewater sample locations (WDC -1 through WDC -6) will be
collected from the SEI discharge canal.
The field parameters listed in Table 5-1 will be measured and recorded during the
collection of these water samples. All grab wastewater samples will be submitted to the
Duke Energy analytical laboratory and analyzed for the constituents listed in Table 5-1.
The SEI discharge canal is used for wastewater treatment collection and conveyance
and is permitted under the NPDES program. The EEI discharge canal is a remnant ash
basin feature with discharge to the intake canal of the Hyco Reservoir. Consequently,
the wastewater samples will be compared to the 2B standards for informational
purposes only.
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5.2 Sediment Samples
Sediment samples will be collected from the EEI and SEI discharge canals. Sediment
samples may be collected from a boat or samplers standing on the shoreline depending
upon the proposed sampling location and accessibility.
The following sediment samples will be collected in support of the EAB EEI discharge
canal assessment (Figure 5-1) and the WAB SEI discharge canal (Figure 5-2) assessment:
y Five sediment sample locations (EDC -1 through EDC -5) will be collected
from the EEI discharge canal; and
41, Six sediment sample locations (WDC -1 through WDC -6) will be collected
from the SEI discharge canal.
Sediment samples will be collected with a coring device that can retrieve a relatively
undisturbed sediment core sample of at least 0.5 foot depth. If an intact core sample
cannot be collected, a sediment sample will be collected with a Ponar dredge or
equivalent sample device.
The sediment samples will be analyzed for analytical parameters listed in Table 5-2 and
compared to the USEPA Region 4 Freshwater Sediment Ecological Screening Values
(ESV).
Sediment core samples will be analyzed by polarized light microscopy (PLM) to
determine the presence and quantity of coal ash in sediment core samples, if present.
5.3 Groundwater Samples
Groundwater analytical data previously collected from select existing monitoring wells
strategically positioned in relation to the extension impoundments and their discharge
canals will be used in the assessment. For the WAB SEI and discharge canal, these wells
include: MW-26BR, MW-18D/BR, MW-15D/BR, MW-4BR, CW -4, CW -3, CW -31), MW-
12BR, MW -2 and MW-9BR. For the EAB EEI and discharge canal, these wells include:
MW -313R, MW-23BR, MW-24BR, MW-20BRL, MW-24BR, MW-25BR and GMW-9.
Analytical data for these existing monitoring wells has also been provided in the CSA
report, the CAP Part 1 and Part 2 reports and the CSA Supplement 1 report.
Additional monitoring wells are proposed at strategic locations located along the
discharge canals in relation to the revised CCR impoundment compliance boundary.
The proposed well locations for the EAB EEI discharge canal are depicted on Figure 5-1
and include: MW -27, MW -28, MW -29, and MW -30. The proposed well locations for the
WAB SEI discharge canal are shown on Figure 5-2 and include: MW -31 and MW -32.
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Following appropriate access and permit approvals including NCDEQ Erosion &
Sediment Control, the proposed monitoring wells will be installed in general
conformance with the CSA Work Plan. In most instances, the shallow
residuum/saprolite materials are unsaturated above the underlying bedrock. Therefore,
where applicable, the monitoring wells will be installed to the first measureable water
bearing fracture (> 1 gpm) in the bedrock, similar to the previous extension
impoundment investigations. If saturated conditions are encountered in the
residuum/saprolite materials, a companion shallow well will be installed.
During boring installation, lithologic information, including color, density, soil/ rock
type, and fracture occurrence, will be documented in accordance with the CSA Work
Plan. Following boring and, as applicable, surface casing installation, 2 -inch PVC well
materials utilizing a 10 -foot pre -packed screen will be installed and the well completed
consistent with the CSA Work Plan. Following well completion, the newly installed
wells will be surveyed for location and elevation.
Following well development, groundwater samples will be collected using low flow
sampling techniques utilizing either a peristaltic pump or submersible pump per the
groundwater sampling procedures presented in the CSA Work Plan. Field parameters,
as listed in Table 5-3, will be measured and recorded during groundwater sampling.
Groundwater samples will be submitted to the Duke Energy analytical laboratory and
analyzed for the constituents listed in Table 5-3. Groundwater results will be compared
to the 2L and IMAC values.
5.4 Field and Sampling Quality Assurance/Quality Control
Procedures
Documentation of field activities will be completed using a combination of logbooks,
field data records (FDRs), sample tracking systems, and sample custody records as
detailed in the CSA Work Plan.
5.4.1 Field Logbooks
The field logbooks are permanently bound and provide a hand written account
of field activities. Entries are made in indelible ink, and corrections are made
with a single line with the author initials and date. Each page of the logbook is
dated and initialed by the person completing the log. Partially completed pages
will have a line drawn through the unused portion at the end of each day with
the author's initials. The following information is generally entered into the field
logbooks:
,67 The date and time of each entry;
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47 A summary of important tasks or subtasks completed during the day;
10 A description of field tests completed in association with the daily task;
161, A description of samples collected including documentation of quality
control samples that were prepared (rinse blanks, duplicates, matrix spike,
split samples, etc.);
47 Documentation of equipment maintenance and calibration activities;
0 Documentation of equipment decontamination activities; and,
y Descriptions of deviations from the work plan.
5.4.2 Field Data Records
Sample FDRs contain sample collection and/or exploration details. A FDR may
be a preprinted fill-in the blanks form on paper or it may be an electronically
generated form where data and information is recorded and stored directly onto
an I -pad or similar. A FDR is completed each time a field sample is collected.
The goal of the FDR is to document exploration and sample collection methods,
materials, dates and times, and sample locations and identifiers. Field
measurements and observations associated with a given exploration or sample
collection task are recorded on the FDRs. FDRs are maintained throughout the
field program in files that become a permanent record of field program activities.
5.4.3 Sample Identification
Each sample location should be unique and identified by the sample location and
depth interval, if applicable (e.g., SEI DC SD -1 [0-1'1). Samples will be numbered
in accordance with the proposed sample IDs shown on Figures 5-1 and 5-2.
5.4.4 Field Equipment Calibration
Field sampling equipment (e.g., YSI pH/conductivity/temperature/dissolved
oxygen/oxidation-reduction potential [ORP] meter) will be properly maintained
and calibrated prior to and during continued use to confirm that measurements
are accurate within the limitations of the equipment. Personnel will follow the
manufacturers' instructions to determine if the instruments are functioning
within their established operation ranges. To be acceptable, a field test must be
bracketed between acceptable calibration results. The calibration data will be
recorded on a FDR.
10 The first check may be an initial calibration, but the second check must be a
continuing verification check.
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47 The field parameter meter must undergo morning, afternoon and end of day
calibrations, as applicable.
01 Verify the calibration at no more than 24-hour intervals during use and at the
end of the use if the instrument will not be used the next day or time periods
greater than 24 hours.
`7 Initial calibration and verification checks must meet the acceptance criteria.
47 If an initial calibration or verification check fails to meet the acceptance
criteria, immediately recalibrate the instrument or remove it from service.
,67 If a calibration check fails to meet the acceptance criteria and it is not possible
to reanalyze the samples, the following actions must be taken:
- Report results between the last acceptable calibration check and the
failed calibration check as estimated (qualified with a "J");
- Include a narrative of the problem; and
Shorten the time period between verification checks or repair/replace
the instrument.
47 If historically generated data demonstrate that a specific instrument remains
stable for extended periods of time, the interval between initial calibration
and calibration checks may be increased.
- Acceptable field data must be bracketed by acceptable checks. Data
that are not bracketed by acceptable checks must be qualified.
- Base the selected time interval on the shortest interval that the
instrument maintains stability.
If an extended time interval is used and the instrument consistently
fails to meet the final calibration check, then the instrument may
require maintenance to repair the problem or the time period is too
long and must be shortened.
,67 For continuous monitoring equipment, acceptable field data must be
bracketed by acceptable checks or the data must be qualified.
Sampling or field measurement instrument determined to be malfunctioning will
be repaired or will be replaced with a new piece of equipment.
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5.4.5 Sample Custody Requirements
A program of sample custody will be followed during sample handling activities
in both field and laboratory operations. This program is designed to account for
each sample at all times. The appropriate sampling and laboratory personnel
will complete sample FDRs, chain -of -custody records, and laboratory receipt
sheets.
The primary objective of sample custody procedures is to obtain an accurate
written record that can trace the handling of all samples during the sample
collection process, through analysis, until final disposition.
Field Sample Custody
Sample custody for samples collected during each sampling event will be
maintained by the personnel collecting the samples. Samplers are responsible for
documenting each sample transfer and maintaining sample custody until the
samples are shipped off-site. The sample custody protocol followed by the
sampling personnel involves:
,61 Recording sample locations, sample bottle identification, and specific sample
acquisition measures on appropriate forms;
161, Using sample labels to document all information necessary for effective
sample tracking; and,
y Completing sample FDR forms to establish sample custody in the field before
sample shipment.
Prepared labels are normally developed for each sample prior to sample
collection. At a minimum, each label will contain:
,67 Duke Energy power plant (Roxboro);
y Sample location (identification) and depth (if applicable);
01 Sample collection date and time; and,
01 Analyses requested; and
y Preservative (if applicable).
Blank chain -of -custody records for each media will be provided by the analytical
laboratory. Analytical parameters and the bottle ware required for each
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analytical parameter will be listed on the blank chain -of -custody records. A
chain -of -custody record documenting samples collected will be prepared each
day following sample collection. Chain -of -custody records document the
following:
,67 Sample location/identification;
01 The requested analysis and applicable preservative;
-61 The dates and times of sample collection;
,61P The number of sample containers corresponding to each sample and analysis;
10 The signature of the sampler completing the chain -of -custody form;
0 The date, time and sampler signature documenting the transfer of sample
custody from the sample crew to the courier or laboratory personnel
receiving the samples; and
10 The date, time and signature of the courier (or laboratory personnel)
documenting receipt and custody of the samples.
Completed chain -of -custody forms will be photographed by the sample team
and the photograph will be forwarded to designated SynTerra personnel along
with daily progress reports to assist in tracking sample collection and analysis.
Sample Container Packing
Sample containers will be packed in plastic coolers for shipment or pick up by
the laboratory. Bottles will be packed tightly to reduce movement of bottles
during transport. Ice will be placed in the cooler along with the chain -of -custody
record in a separate, resealable, air tight, plastic bag. A temperature blank
provided by the laboratory will also be placed in each cooler prior to shipment if
required for the type of samples collected and analyses requested. Sample
coolers will be closed and secured using shipping tape and a signed custody seal
placed across the cooler lid and body to document that the sample cooler was not
opened during sample transport to the analytical laboratory.
5.4.6 Quality Assurance and Quality Control Samples
The following quality assurance/quality control (QA/QC) samples will be
collected during the proposed field activities:
161, Equipment rinse blanks (one per day);
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47 Field Duplicates (one per 20 samples per sample medium)
Equipment rinse blanks will be collected from the sediment core collection
device and non -dedicated groundwater sampling equipment on days when they
are used for sample collection. The sediment core collection device will be
cleaned after collection of sediment samples from a designated sampling
location. The sediment core collection device will be cleaned following
documented cleaning procedures. An aliquot of the final control rinse water will
be passed over the cleaned equipment directly into a sample container and
submitted for analysis. The equipment rinse blanks enable evaluation of bias
(systematic errors) that could occur due to decontamination.
Groundwater samples will be collected using low flow sampling techniques
utilizing either a peristaltic pump or submersible pump and new sample tubing.
Used sample tubing will be discarded following sample collection from
individual monitoring wells. Deionized water provided by the analytical
laboratory will be transferred directly into equipment blank sample containers
via new and unused sample tubing. The groundwater sampling equipment
blanks enable evaluation of bias (systematic errors) attributed to groundwater
sampling equipment.
A field duplicate is a replicate sample prepared at the sampling locations from
equal portions of all sample aliquots combined to make the sample. Both the
field duplicate and the sample are collected at the same time, in the same
container type, preserved in the same way, and analyzed by the same laboratory
as a measure of sampling and analytical precision.
Field QA/QC samples will be analyzed for the same constituents as proposed for
wastewater, sediment and groundwater, as identified on Tables 5-1 through 5-3,
respectively.
5.4.7 Decontamination Procedures
Proper decontamination of sampling equipment is essential to minimize the
possibility of cross contamination of samples. Previously used sampling
equipment will be decontaminated before sampling and between the collection
of each sample. New, disposable sampling equipment (e.g., peristaltic pump
tubing) will be used for sampling activities where possible.
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Decontamination of Field Sampling quipment
Field sampling equipment reused to collect multiple samples (e.g., sediment core
collection device) will be decontaminated between sample locations using
potable water and phosphate and borax -free detergent solution and a brush, if
necessary, to remove particulate matter and surface films. Equipment will then
be rinsed thoroughly with tap water to remove detergent solution prior to use at
the next sample location.
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6.0 MODELING OF GROUNDWATER IMPACTS TO SURFACE WATER
Groundwater modeling is presented in Section 4.0 of the CAP Part 1 Report (SynTerra,
December 2015) and Section 3.0 of the CAP Part 2 Report (SynTerra, February 2016).
The extension impoundment and discharge canal assessment data will be evaluated to
determine whether additional groundwater modeling is warranted.
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7.0 EXTENSION IMPOUNDMENT AND DISCHARGE CANAL
ASSESSMENT REPORT
The extension impoundment and discharge canal assessment activities and data will be
presented in a CSA supplement report, which will include the following components:
01 Executive Summary
tT Site History and Source Characterization
,01 Site Geology and Hydrogeology
0 Sampling Results
-01 Site Conceptual Model
'0 Groundwater Modeling
0, Conclusions and Recommendations
'0' Figures
0, Tables
,01 Appendices
The following deliverables will be included:
-01 Geologic cross sections that include the relative position of the impoundments
and coal ash in the impoundments relative to the ash basins and the water table.
-01 Photographs of sediment cores for each sampling location.
0 Laboratory analytical reports and chain of custody forms.
Page 7-1
P: \Duke Energy Progress.1026\ 107. Roxboro Ash Basin GW Assessment Plan\ 27.Ash Basin Assessment -
PCR72 \ Extension Impoundment Discharge Canals Work Plan Aug 2016.docx

Ash Basin Extension Impoundments and Discharge Canals Assessment Work Plan August 2016
Roxboro Steam Electric Plant SynTerra
8.0 PROPOSED SCHEDULE
Proposed schedule milestones are as follows:
Field work will be initiated within approximately 45 days following NCDEQ
final approval of this work plan; and
y CSA supplement report will be submitted to NCDEQ within approximately 60
days following receipt and validation of all analytical data.
Page 8-1
P: \Duke Energy Progress.1026\ 107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment -
PCR72 \ Extension Impoundment Discharge Canals Work Plan Aug 2016.docx

Ash Basin Extension Impoundments and Discharge Canals Assessment Work Plan August 2016
Roxboro Steam Electric Plant SynTerra
9.0 REFERENCES
AMEC Foster Wheeler, Duke Energy Coal Combustion Residuals Management Program,
Roxboro Steam Station, June 16, 2015.
Duke Energy, 2014; http://www.duke-energy.com/pdfs/duke-energy-ash-metrics.pdf
(Updated June 23, 2016)
SynTerra. Drinking Water Well and Receptor Survey for Roxboro Steam Electric Plant,
NPDES Permit# NC0038377. September 2014.
SynTerra. Supplement to Drinking Water Well and Receptor Survey for Roxboro Steam
Electric Plant, NPDES Permit# NC0038377. November 2014.
SynTerra. Proposed Groundwater Assessment Work Plan for Roxboro Steam Electric Plant
(Revision 1). December 30, 2014.
SynTerra. Comprehensive Site Assessment Report - Roxboro Steam Electric Plant. September
2, 2015.
SynTerra. Corrective Action Plan Part 1 - Roxboro Steam Electric Plant. December 1, 2015
SynTerra, Corrective Action Plan Part 2 — Roxboro Steam Electric Plant. February 29, 2016
SynTerra, Comprehensive Site Assessment Supplement 1— Roxboro Steam Electric Plant.
August 1, 2016
Page 9-1
P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment -
PCR72 \ Extension Impoundment Discharge Canals Work Plan Aug 2016.docx

Ash Basin Extension Impoundments and Discharge Canals Assessment Work Plan August 2016
Roxboro Steam Electric Plant
FIGURES
SynTerra
P: \Duke Energy Progress.1026\ 107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment -
PCR72 \ Extension Impoundment Discharge Canals Work Plan Aug 2016.docx

Lake - -
yco Lake
N I y
I
5000
450
IV
-450
O. CCR SURFACE IMPOUNDMENT,
COMPLIANCE BOUNDARY / O
■-- s CCR SURFACE
POWER PLA - ` IMPOUNDMENT BOUNDARY
I HEATED WATER DISCHARGE POND
EASTERN EXTENSION O
IMPOUNDMENT
(� 1 1966 (EAST) ASH BASINAll
O \
n ssD
` 1973 (WEST)
O ASH BASIN
v
- 550 ` \ -
J
NAWAY_RD PROPERTY BOUNDARY
550ii� or no
5 � SOUTHERN EXTENSION_ ---J
�. IMPOUNDMENT 0
i 1 J ((sem
ll i ✓I� V - ?v
`CCR SURFACE
IMPOUNDMENT BOUNDARY o
00.
v�Ll
O 00�
' �\ ARCHyE c
c<4` �� �� � �
Toy
SOURCE:.., I o
USGS TOPOGRAPHIC MAP OBTAINED FROM THE USGS MAP STORE AT
http://store.usgs.gov/b2c_usgs/b2c/start/%%%28xcm=r3standardpitrex_prd%%%29/.do
ROXBORO STEAM ELECTRIC PLANT FIGURE 1-1
PERSON COUNTY SITE LOCATION MAP
141, DUKE ENERGY PROGRESS
GREENSanRD0 ROXBORO STEAM ELECTRIC PLANT
.RALEIGH 1700 DUNWAY RD
Terra GEVILLE LLE•
.V n . HARto E SEMO 70 NORTH CAROLINA
.FAYETTEVIL�E OLIVE HILL, NC QUADRANGLE
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA WILMINGTONFDRAWNJ. CHASTAIN DATE:08/03/2016 GRAPHIC SCALE
PHONE [phone] NAGER: C. EADY CONTOUR INTERVAL: 10ft 1000 0 1000 2000
www.synterracorp.com 1-1 (USGS TOPO MAP) MAP DATE: 2013
IN FEET
08/17/2016 10:32 AM P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment - PCR72\DWG\DE ROXBORO ASH ASS FIG 1-1 (USGS TORO MAP).dwg

LEGEND
i"fp 1 f t DUKE ENERGY PROGRESS PARCEL LINE
PERSON COUNTY PARCEL LINE
AII
—CCRSURFACE IMPOUNDMENT COMPLIANCE BOUNDARY
.. HYCO RESERWIR '1 !' / rtC'`•,. pN
CCR SURFACE IMPOUNDMENT
COMBINED COMPLIANCE BOUNDARY
. y -R N
LINEDLREATMEUMI IT
'� Ar``MW14BR� LINED LANDFILL LIMIT (APPROXIMATE)
B ABMW-SBR CSA MONITORING WELL (SURVEYED)
-CO aESERVJ�'R - - �'^ x {E`• MW -14D MW-14EIIING 161 5 COM PLIANCE MONITORING WELL (SURVEYED)
=.RAugonD 1 T
Ap�.S.'ba +"'4 �: ® LANDFILLOUND COMPLIANCE MONITORING MON MONITORING WELL (SURVEYED)WE (SURVEYED)
• .. �. ,,.• Li L$y 2;,iAh r.I •.'H k 4r y,'y r ! BMW -2 MONITORING WELL (SURVEYED)
"y'xS
• Y
. r. °.. .; :,: f' ..y" '.: � 4'!� �" �^ ' y�i � 'A`�� � v3 •' n Pz-1z PIEZOMETER (SURVEYED)
- ,;• 1, "N
f• MW 3BR d':3:y' -� 3/R"1y' AEM LEACHATE SAMPLE LOCATION(APPROXIMATE)
'f,W -i■SW-6 SURFACE WATER& SEDIMENT SAMPLE LOCATION
OF"ISEEP SAMPLE LOCATION
1' N•L• •R013 NC DEQ SUPPLY WELL SAMPLE ID (APPROXIMATE)
416
2BR
-s...
11 22-
MW
M
n.
v y
.
77-iI
n
A I
• r -' ' ' - ' - �� �� `'� bS - 1 SOURCES:
w 1B
04AEI21AL PHOFOGRAPH OBTN OLT FROM WePGROUPNGRY NORM CFROLINA
r
TOGRAPHS
nrsrso wnran n.scrAuoa rano s" au. '' I r _ ROMTHE DGEOSPATIA/POORToNAT60E OFlHE W6P AERIAL COVERAGE WERE
`*
MW-fi' / conemap. ov eppo ca man/M1ome.page
ILL UoIIS FOSPVEOERN LINE
ADANFILLIMITSAND BOUNDAREG ARE TODDPROGR11O
0 ROES6gTEGL SANM S6Ei NGNWSB CREED. THE HORIZOMAL DATUM I66ET TO NAD83
} MW ED ABMW5BA8MW-5 \ )
Vii• ', D� SETW HAPRNECT ON OF NORTH CAROLINA STATE PLANE CODRD NATE
—TEM FIRS OB (NAD 83)
S,.1 ' :... EASTASN BASIN BM SB
NPDES OUTFALL 003 \ - �' 'r ®ABMW-IBR: (-0 _ 32
w/BR Ta PERSON DIGIB DATA AT
� _:p';se.pe,ranreanarac
HYCO RESERVOIR LP -2
ABMW 48R ' 10
w-11Brt 9 _
0100
a 600
Mw LINEDASN MONOFILL 5D060Si O'.=' �I
;Y CW2 CIA -2D♦ ABMW.6BR �` I ' -
��• aN HRL p
O%rsti'_' n-. �EPoNp
�i1 HMNE 'P I E45TEFNN6ro .y SW -6 . ` MN�wM et
�33 4T`Wb 0 se^ x •. Y A ■ SW 3 P 1 +* �..A �, \ � 7x LP -4 ♦ N MEN _
" y .. • , .s.x •Mw.2 ABMW 3 ABMW 3BR 11' ^^' • - -
LPS LP6
- 17. ®B •tq' p-1305 ABMW-3 ABMW-3gF
�v Y
WEST ASH BASIN
<'i F -'`,•4~l >B!c O0 0' 13~7 Mme•
1"Xi, ire xa oP1zl
r,t
�
�cF - BR y w-1
-
LZ
0'. NPOEs ouTFAu ooz '*� r,
WEST ASH BASIN MAIN DANT
.0 ( /
` \ ABMW 28R 4` e` .�.i® - EI,
usR Pov � `
ao nracor ADMW.2� � ` : •- ^_ b' MW-t68R l� R T' ,p .\ �" , 0c, 2
".R• -- .fes '/r NEx1EN610N IMPoUNDMEM
MW 19gRL
a
.RDS •
51
A y,v te..+ :. + • R0. 1 ♦R015r
,..1
-
Roe ROSi F _
/ 4I r
FA ST ASH BASIN
r
GAP HIC SCALE
500 O ?5 500 1000
:A ... S.L-., -
-
t y�..
(IN FEET)
a
.. 7r -Fri? •,,.. ... .. -3i"
a
m
i
1
a
f ; I, -
synTerra
. . . . . . .
148 River Street, Suite 220
Greenville, South Carolina 29601
864-4219999
-
-
www.Byoterracorp.00m
< BOVMERN E%TEN610N
IMPOUNOMEM
- I
DRAWN BY: JOHN CHASTAIN DATE: 08/15/2016
CHECKED BY: C. EADY DATE: 08/15/2016
PROJECT MANAGER: C. EADY
LAYOUT NAME: FIG 1-2 SITE LAYOUT
• an n '!-
� ool DUKE
ENERGY
Epaxm
I
L
v / —.-:. �� � • � � ._ SN,NIED �,� � •_��"� PROGRESS
n
Y
��-F7 -- �1 f� a - iR 00 DUNNAWA STEAM EDLECTRIC PLANT
- - — SEMORA, NORTH CAROLINA
FIGURE 7-2
0
�.. _
J
SITE LAYOUT MAP

a
PRW-2 ,, II p
SHORE R
OWi
� o Rpt�R
GYPSUM PAD
'`'' e.. ..._. �!_s
Yle 'L
� cy
OO
CW -2 CW 20 _ CW -5 LINED ASH MONOFILL L _
ala
5 CMW-7 e
D W 26
DW 25. r,
\ CMW-8 11ii
1
1 PRW-4
ti
WEST ASH
BASIN i
DW 46
DW 37 I SF/4pA
qR `
D"148 OWC".,I qy _
eDl \8 5�
DW -42 DW43/
DW -44
PRW-6 DW55'..
DW -45 /PRIV 7j
DW -6
DW -62
/ m
/ 0
0
DUKE
ENERGY
PROGRESS
{ ROXBORO STEAM ELECTRIC PLANT
1700 DUNNAWAY RD
SEMORA, NORTH CAROLINA
FIGURE 2-1
WATER WELL SURVEY
UPDATED AUGUST 2016
LEGEND
DUKE ENERGY PROGRESS PARCEL LINE
PERSON COUNTY PARCEL LINE
-
CCR SURFACE IMPOUNDMENT
— RAILROAD--
COMPLIANCE BOUNDARY
45NORE DR __
CCR SURFACE IMPOUNDMENT
RpIlRO�
_
HALF MILE SURVEY BOUNDARY
�{ FLOW DIRECTION
OC71 COMPLIANCE MONITORING WELL (SURVEYED)
$FB G-11 BACKGROUND COMPLIANCE MONITORING
WELL (SURVEYED)
_f
B CMW-8 LANDFILL MONITORING WELL (SURVEYED)
1' PRW-i POSSIBLE WATER SUPPLY WELL
Q
OW71REPORTEWOBSERVED WATER SUPPLY WELL
FD—W-11SUPPLY WELL OR SPRING REPORTED
W1
YAPROPERTY OWNERTER
C2
EDR EDR REPORTED SURFACE WATER INTAKE
/ 1760
(APPROXIMATE)
DW50
(PRW-3)
DW -3
DW -4
DW -6
DW -7
OW -8
DW -9
DW-11
DIN 12
-13
DW - 1144
DW -15
O W-77
W-79
I
DW -20
V-22 /
SOURCES:
1 2012 AERIAL PHOTOGRAPH OF PERSON COUNTY, NORTH CAROLINA
WAS OBTAINED FROM THE LESS EARTH EXPLORER WEB SITE AT
http://eartnexpbrer usgs.gav/
2. WELL SURVEY INFORMATION PROPERTY LINE, LANDFILL LIMITS AND
BOUNDARIES ARE FROM ARCGIS FILES PROVIDED BY SBME AND
PROGRESS ENERGY
3, PARCEL BOUNDARIES WERE OBTAINED FROM PERSON COUNTY (NC)
GIS DATA AT httpl1gis personmun I
4. 2014 AERIAL PHOTOGRAPH WAS OBTAINED FROM WSP FLOWN ON
APRIL 17, 2014.
5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA
STATE PLANE COORDINATE SYSTEM FIBS 3200 (NAD 83).
A 10R CONTOUR INTERVALS FROM NCDOT LIDAR DATED 2007
httpsJ/connect. nedot.gov/resowceyAls Pages/cronf-elev_v2.aspx
NOTE:
1. CONTOUR LINES ARE USED FOR REPRESENTATIVE PURPOSES ONLY
AND ARE NOT TO BE USED FOR DESIGN OR CONSTRUCTION PURPOSES.
DI SPLAYED WATER SUPPLY WELL OR SPRING LOCATIONS ARE
APPROXIMATE.
GRAPHIC SCALE
0 350 ]00 140n
(IN FEET)
synTerra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
W W W.Synterracorp.com
r1\ _.
DRAWN RY (. NFWFII DATE_ 7/9R/9n1R
DUKE
ENERGY
PROGRESS
{ ROXBORO STEAM ELECTRIC PLANT
1700 DUNNAWAY RD
SEMORA, NORTH CAROLINA
FIGURE 2-1
WATER WELL SURVEY
UPDATED AUGUST 2016

EASTERN DISCHARGE CANAL
ELEMIN
CTRICAL SUBSTATION
I
• • c 'rQi
_ s
���iii ._KLA � '� • '� �� 4, i;:... � ` . ` f.
4.
N !'i MW 20BRL
PZ 12 4: ry s
mp _ CL -2
y,
NL -4 a ' ` "1
EASTERN EXTENSION IMPOUNDMENT NL -8 { > .# ` .x r
CL -5 R �'
CV -1 _ y
f[
n s
>� I a -
MW -24 /
07
LEGEND /
CV -2 SYNTERRA SEDIMENT & WASTE WATER LOCATION (APPROXIMATE) , ', / MW-17BR A' E,oNNSONCN\
A SYNTERRA SEDIMENT LOCATION (APPROXIMATE)IL(APPROXIMATE)
C-5 SYNTERRA WASTE WATER SAMPLE LOCATION APPROXIMATE ;
® DUKE ENERGY PROGRESS PARCEL LINE ( ) a / �.�n➢
PERSON COUNTY PARCEL LINE
CCR SURFACE IMPOUNDMENT COMPLIANCE BOUNDARY /
CCR SURFACE IMPOUNDMENT
COMBINED COMPLIANCE BOUNDARY ` � MW -256R �
GRAPHIC SCALE
GURE 4-1
NPDES TREATMENT UNIT / 160 0 160 300 SAMPLE LOCATION MAP
ABMW 2 CSA MONITORING WELL (SURVEYED) IN FEET
BFM-W---21 MONITORING WELL (SURVEYED) 148 RIVER STREET, SUITE 220 EAB EASTERN EXTENSION IMPOUNDMENT
GREENVILLE,SOUTHCAROLINA29601
PZ 12 PIEZOMETER (SURVEYED) PHONE [phone]
DUKE ENERGY PROGRESS
• R013 NC DEQ SUPPLY WELL SAMPLE ID (APPROXIMATE) www.synterracorp.com ROXBORO STEAM ELECTRIC PLANT
synTerra EAvour: FIG4-1(EASTERN ImRI DRAWN BY: JOHN CHAS -IN DATe 0aiO4i2016 SENORA, NORTH CAROLINA
SOURCE • PROJECT MANAGER: CRAIG EADY
APRIL 17, 2014 AERIAL PHOTOGRAPH OBTAINED FROM WSP GROUPS

F��TER DIKE
0
'by.. �..�..
CF -2 /f POND AB
W.E.=±446.1'
WF -2
EF -2
POND A7 ..
W.E: 1446.1'EF-1 <,! y.. ' t,
SOUTHERN EXTENSION IMPOUNDMENT
it
a:• sem. +F �410on W17
4a if
e
R
a'
CF-3
MW-15BR
Mw 17D
CF -4
WF -4 a,
-
;.
MW-18BR
.�e - ?
F
vp 70-
CF-
. A.. �J
c
` z
> ♦> "'"' rt �, , iii. ;�. - � ,,; - s + .'
pp[yy
LEGEND
A WF -2 SYNTERRA SEDIMENT LOCATION (APPROXIMATE) I
WF -4 SYNTERRA WASTEWATER SAMPLE LOCATION (APPROXIMATE)
DUKE ENERGY PROGRESS PARCEL LINE
PERSON COUNTY PARCEL LINE
y /CCR SURFACE IMPOUNDMENT COMPLIANCE BOUNDARY
CCR SURFACE IMPOUNDMENT
COMBINED COMPLIANCE BOUNDARY
NPDES TREATMENT UNIT y k a /
S ABMW 2 CSA MONITORING WELL (SURVEYED) �e`3
n 1 J! GRAPHIC SCALE
f CW 1 COMPLIANCE MONITORING WELL (SURVEYED)` was c"' 14 rI, 150 0 150 300 FIGURE 4-2
BG 15BACKGROUND COMPLIANCE MONITORING WELL (SURVEYED) y qrr� al ,,,� N�su#uw,� ��"t IN FEET SAMPLE LOCATION MAP
�+ �LiV )(I )� 'I 148 RIVER STREET, SUITE 220
Mw -2 MONITORING WELL (SURVEYED) N y,s y{ PF 4 GREENVILLE, SOUTH CAROLINA 29601
WAB SOUTHERN EXTENSION IMPOUNDMENT
�PZ-12 PIEZOMETER (SURVEYED) , � �N1 �, ) x / PHONE [phone] DUKE ENERGY PROGRESS
n y, +»j°"r �'r, _ www,s,n,erra,3o,,.com
• R013 INC DEQ SUPPLY WELL SAMPLE ID (APPROXIMATE) , , .� ., ROXBORO STEAM ELECTRIC PLANT
DRAWN BY: JOHN CHAS -IN DATE: 08/04/2016
SOURCE: L -,, :.. � (v,; G� r� PROJECT MANAGER* CRAIG EADY SEMORA NORTH CAROLINA
Y' "I - - LAYOUT: FIG 42
(SOUTHERN IMP)
APRIL 17, 2014 AERIAL PHOTOGRAPH OBTAINED FROM WSP GROUP ��� P\n,keFnP P„0,P«im6\107a xn , Ana mrwA P«mP rPla 7A naa AccessmPr,r-PCR79\nwn\DFRoxRnRnASHAssFlr,iarsITFIAYnlmnwa

,I
cA
J
,
�S
- t
MW 14D
MW 28
. j �� 1 Vii• '
-"I <f'4" e7 'yct fi. 0.� il•f .f.1•Rn'^ J
's i �.�.`„�� �i ".. `;� e' I - �� taw' �i i, �`t `i '�, . # •. ^?c ,�' : t` ,
', ,,, � ao •EDC 5 ` t v �. ,„ -
-, � ELp,\L �, p. yR s r'" °'�w° � .; '. � • " � ,•,��x �
R+4q s q v:
` � - K rur
A
o� F 40 EDC -4
,`r: pk �,.�. .•^r ;- IVI-Vl' 29y+.; ani. 'fit£ i
' GYPSUM PAD
GYPSUM PAD STORM-- x.'* .0 ,js{•„• ,, n_� - 1 '� `
�'• DISCHARGE PIPE FROM
SWATER
YSTEM CONVEYANCE �F >_ 4". i„ frK�, .. .}+ • t
SOUTH LANDFILL POND �p S `""' N +ate
NOT FIELD VERIFIED �O� a:" �`• ,N, .,
Q S-14 / F .. ? ti '
�l{pie
GYPSUM PAD LINER EDC
`5 -\ ®
SNOT FIELD VERIFIED - ✓ + ;;�* $ '.t '� ,
�. MW-22D MW 22BR a` `
�r
ELECTRICAL SUBSTATION
CEARA TRAILERS
ABMW-?
ABMW 7BR
ABMW 7BRL
LINED ASH MONOFILL ISD-
PZ-12
SD PZ-12
y
FAS N FXT N` n
mo .: F g�0 SW-6 1?N IMPpUNOMFNT
Na o� e
T`
R04i��_✓oNNs
R07 oN�N
MW 21BRL � AVER 110
1
F-72-31 GMW-8
`,:,• '$ ,_ 'S+ GMW 9� ��
'r0.
-
' 1 P-116 � T
l P-117< �, r / �; �. P 137
m00,it
:- s MW 13BR
P 103 P 141 s` • R09
LEGEND
0 MW-33 PROPOSED CSA WELL LOCATION
EDC-1 PROPOSED SEDIMENT & WASTEWATER
SAMPLE LOCATION
DUKE ENERGY PROGRESS PARCEL LINE ,.`. MW 19BRL w�li t w
PERSON COUNTY PARCEL LINE
CCR SURFACE IMPOUNDMENT `� •:R05 x
* ,•it�
COMPLIANCE BOUNDARY\,I
CCR SURFACE IMPOUNDMENT PON°� ' '``
COMBINED COMPLIANCE BOUNDARY'a;r
NPDES TREATMENT UNIT .> 5... p�
ABMW 2 CSA MONITORING WELL (SURVEYED) R03 • 'Rpg • R0: R011 r. ®gwAyRp M* R015
COMPLIANCE MONITORING WELL • ' ` -
CW 1 (SURVEYED)R062
`
T..
GMW-8 LANDFILL MONITORING WELL GRAPHIC SCALE
FIGURE 5-1
250
(SURVEYED) 500 SAMPLE LOCATION MAP
S MW-2 MONITORING WELL (SURVEYED) IN FEET
C' PZ-1- 2 PIEZOMETER (SURVEYED) 148 RIVER STREET, SUITE 220 EAB EEI EASTERN DISCHARGE CANAL
NC DEQ SUPPLY WELL SAMPLE ID PHONEGREENILLE, SOUTH CAROLINA 29601 DUKE ENERGY PROGRESS
PHONE[phone]ROXBORO STEAM ELECTRIC PLANT
• R013 (APPROXIMATE) www.synterracorp.com
SOURCE: Terra DRAW NBY:JOHNCHASTAIN DATE: 08/04/2016 1700 DUNNAWAY RD
PROJECT MANAGER: CRAIG EADY DATE PRINTED: SEMORA, NORTH CAROLINA
APRIL 17, 2014 AERIAL PHOTOGRAPH OBTAINED FROM LAYOUT: FIG 5-1 (EAST NPDES) 08/17/201610:26AM
WSP GROUP

�1 MW 5D
CW 2 1 CW 2D ��-000
�.
� MW 5BR CW 5 i•
MW 1,
ABMW-3
- / / raa ".z MW -2 gPs\NMP\NOPM ABMW 3BR t
'a � Nr+`'•=- ` s `,&` Est PSN s
IWESTASHBASIN,
v,
ABMW-1BR !� ABMW-1
4, Y
MW-8BR
MW-12BR S
EWESTFGD POND EAST ,
- I WDC -6 FGD
POND j
•
L
r
N
_ as
m
Z
'ABMW-6BR
GUARD HOUSE ti
ABMW-6
"FLP -41 A
,Y s'
FLUSH POND xA#, •'9
• ` �m ��� � ABMW-2BR ,
}
310 -REACTOR ABMW 2` f i
- r;A{xiv
i pi's .ifs,,
. .. 4� MW -32
10,
M W-31 F�
gas
+. BG 1BRL �6
x Y , s r e' v 9��FO FILTER DIKE
MW-4BRL o�
BG 1 WD -2 ,.. V
MW-4BR
WOODLAND CW 4 f . • .,,
ELEMENTARY SCHOOL
G" WDC -1 SOUTHERN EXTENSION IMPOUNDMENT
`LOCKED GATE
' , k
1• M•,= - ' '•� `"sa .fir
R010 9/,'
SFMp g MW -15
F . C
,'r 'A ylNq Y LOCKED GATE
LEGEND
• MW -34 PROPOSED CSA WELL LOCATION
0 WDC -2 PROPOSED SEDIMENT & WASTE WATER z
SAMPLE LOCATION
DUKE ENERGY PROGRESS PARCEL LINE " {
PERSON COUNTY PARCEL LINE �« ` ry
CCR SURFACE IMPOUNDMENT a
COMPLIANCE BOUNDARY
CCR SURFACE IMPOUNDMENT
COMBINED COMPLIANCE BOUNDARY
NPDES TREATMENT UNIT
ABMW 2 CSA MONITORING WELL (SURVEYED)
QIii3O
CW 1 COMPLIANCE MONITORING WELL
(SURVEYED) n
BACKGROUND COMPLIANCE
❑ BG -1D
GRAPHIC SCALE
250 0 250 500
FIGURE 5-2
MONITORING WELL (SURVEYED)
SAMPLE LOCATION MAP
MW -2 MONITORING WELL (SURVEYED)
IN FEET
WAB SEI WESTERN DISCHARGE CANAL
148 RIVER STREET, SUITE 220
ILLE, SOUTH CAROLINA 29601
C PZ -1- 2 PIEZOMETER (SURVEYED)
DUKE ENERGY PROGRESS
NC DEQ SUPPLY WELL SAMPLE ID
0 R013 (APPROXIMATE)
PHONEGREEN
PHONE[phone]ROXBORO
www.synterracorp.com
STEAM ELECTRIC PLANT
DRAWN BY: JOHNCHASTAIN DATE: 08/04/2016
SOURCE:
Ter ra
1700 DUNNAWAY RD
APRIL 17, 2014 AERIAL PHOTOGRAPH OBTAINED FROM
PROJECT MANAGER: CRAIG EADY DATE PRINTED:
LAYCUT:FIG s-2(wEST NPDES) 08/17/201610:28 AM
SENORA, NORTH CAROLINA
WSP GROUP
P:\Duke Energy Pros. 1026\107. Roxboro Ash Basin GW Assessment
Plan\27.Ash Basin Assessment - PCR72\DWG\DE ROXBORO ASH ASS FIG 1-2 (SITE LAYOUT).dwg

Ash Basin Extension Impoundments and Discharge Canals Assessment Work Plan August 2016
Roxboro Steam Electric Plant
TABLES
SynTerra
P: \Duke Energy Progress.1026\ 107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment -
PCR72 \ Extension Impoundment Discharge Canals Work Plan Aug 2016.docx

TABLE 2-1
WATER SUPPLY WELL PROPERTY OWNERS INFORMATION
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
MAPWATER
WELL ID
PUBLIC
SYSTEM
PROPERTY OWNER
PROPERTY ADDRESS
OWNER ADDRESS
PARCEL ID NUMBER
SOURCES
OF
DRINKING
WATER
w
.V. W
W =
f 3 p
APPROXIMAT
E DISTANCE
FROM
COMPLIANCE
BOUNDARY
(FEET)
WELL WELL CASING OR
DEPTH OPEN HOLE WELL SCREEN
(FEET) DEPTH (FEET) JINTERVAL (FEET)
DW -1
NA
CRUTCHFIELD, SARAH D & MICHAEL
4291
MCGHEES
MILL RD
4291 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-64-9710.000
2204
DW -2
NA
HUGHES, DENISE D
2437
MCGHEES
MILL RD
5519 SPINDLEWOOD Ci, DURHAM, NC 27703
9989-04-64-8345.000
1983
DW -3
NA
HUGHES, ANTOINETTE & J BAILEY
4268
MCGHEES
MILL RD
4268 MCGHEES MILL RD, SEMORA, NC 27343
9989-04-74-0468.000
2133
DW -4
NA
HESTER, EVA JEAN LIFE ESTATE
4236
MCGHEES
MILL RD
4236 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-74-0333.000
2013
DW -5
NA
HUGHES, PHILLIP
4165
MCGHEES
MILL RD
4165 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-63-6998.000
1675
DW -6
NA
ZIMMERMAN, CARROLL MERRITT L/ES
4180
MCGHEES
MILL RD
4180 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-74-0104.000
1831
DW -7
NA
HUGHES, LEX LEWIS & RACHEL
4164
MCGHEES
MILL RD
4164 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-63-9887.000
1737
DW -8
NA
CRAWLEY, MAE CHAMBERS LIFE EST
4114
MCGHEES
MILL RD
4114 MCGHEES MILL RD, SEMORA, NC 27343
9989-04-73-0609.000
Y
1645
UNK
DW -9
NA
CRAWLEY, CHRISTOPHER L
4094
MCGHEES
MILL RD
4094 MCGHEES MILL RD, SEMORA, NC 27343
9989-04-73-0508.000
Y
1572
125
DW -10
NA
MAJORS, SANDRA C
4072
MCGHEES
MILL RD
4072 MCGHEES MILL RD, SEMORA, NC 27343
9989-04-63-9590.000
Y
1514
UNK
DW -11
NA
5G LLC
4034
MCGHEES
MILL RD
2309 EASY HORSE TRL, WAKE FOREST, NC 27587
9989-04-82-4547.000
1417
DW -12
NA
5G LLC
4014
MCGHEES
MILL RD
2309 EASY HORSE TRL, WAKE FOREST, NC 27587
9989-04-63-9166.000
1338
DW -13
NA
POWELL, JOHN L & GLADYS
3976
MCGHEES
MILL RD
9215 NC HWY 49, ROXBORO, NC 27574
9989-04-62-9926.000
Y
1330
UNK
DW -14
NA
JEFFERS, SYLVESTER & MARILYN
3962
MCGHEES
MILL RD
3962 MCGHEES MILL RD, SEMORA, NC 27343
9989-04-62-9806.000
Y
1237
UNK
DW -15
NA
FAULKNER, ELIJAH
3924
MCGHEES
MILL RD
3924 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-62-8666.000
Y
1149
240
DW -16
NA
DEAL OF PERSON LLC
3893
MCGHEES
MILL RD
34 LOCHRIDGE DR, ROXBORO, NC 27573
9989-04-62-5459.000
Y
1038
UNK
DW -17
NA
POOLE, LLOYD JR
3892
MCGHEES
MILL RD
284 TANGLEWOOD CIR, ROXBORO, NC 27573
9989-04-62-8437.000
1255
DW -18
NA
DAVIS, LUCY B
3853
MCGHEES
MILL RD
3853 MCGHEES MILL RD, ROXBORO, NC 27573
9989-04-62-5218.000
1010
DW -19
NA
RUSSELL, NOEL R
3854
MCGHEES
MILL RD
3854 MCGHEES MILL RD, SEMORA, NC 27343
9989-04-62-7287.000
1121
DW -20
NA
MCDANIEL, PEGGY D & DONALD W JR
3830
MCGHEES
MILL RD
PO BOX 1636, ROXBORO, NC 27573
9989-04-62-7168.000
Y
1201
DW -21
NA
BENTLEY, PHILLIP ANDREW
3781
MCGHEES
MILL RD
3781 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-52-9154.000
939
DW -22
NA
CRAWLEY, MICKEY RAYE
3770
MCGHEES
MILL RD
3770 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-61-6844.000
Y
1184
UNK
DW -23
NA
JOHNSON, BETTY SUSIE
3749
MCGHEES
MILL RD
3749 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-61-3835.000
Y
962
DW -24
NA
THE BANK OF NEW YORK MELLON
65 THE JOHNSON LN
4656 AUGUSTA HWY, GILBERT, SC 29054
9989-04-61-1903.000
783
DW -25
NA
CARTER, ANGIE
135 THE JOHNSON LN
135 THE JOHNSON LN , SEMORA, NC 27343
9989-04-51-8907.000
429
DW -26
NA
CUNNINGHAM, GLADYS W
156 THE JOHNSON LN
156 THE JOHNSON LN , SEMORA, NC 27343
9989-04-52-5074.000
195
DW -27
NA
KELLY, EARL CLYDE
3617
MCGHEES
MILL RD
PO BOX 84, SEMORA, NC 27343
9989-04-61-0224.000
1144
DW -28
NA
FIFE, SUE H
3599
MCGHEES
MILL RD
3599 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-51-9175.000
Y
1196
250
DW -29
NA
GARLAND, LORRAINE
3614
MCGHEES
MILL RD
315 NICHOLS AVE, ROXBORO, NC 27573
9989-04-61-3029.000
Y
1369
100
DW -30
NA
WILLIAMS, BARRY
3579
MCGHEES
MILL RD
3579 MCGHEES MILL RD, SEMORA, NC 27343
9989-04-51-8091.000
1281
DW -31
NA
TUCK, MATT L
3558
MCGHEES
MILL RD
3558 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-60-1882.000
1414
DW -32
NA
MCCAIN, JOHN N
3535
MCGHEES
MILL RD
3535 MCGHEES MILL RD, SEMORA, NC 27343
9989-04-50-7893.000
1355
DW -33
NA
WINSTEAD, WILLIE ESTATE
399 DUNNAWAY RD
4037 MORTON PULLIAM RD, ROXBORO, NC 27574
9988-01-39-1733.000
Y
1546
DW -34
NA
WINSTEAD, WAYNE B
381 DUNNAWAY RD
381 DUNNAWAY RD, SEMORA, NC 27343
9988-01-39-2741.000
Y
1667
100
DW -35
NA
JEFFERS, HOWARD JR
285 DUNNAWAY RD
285 DUNNAWAY RD , SEMORA, NC 27343
9988-01-39-8619.000
2036
DW -36
NA
PURYEAR KEVIN PROPERTIES LLC
241 DUNNAWAY RD
PO BOX 1117, ROXBORO, NC 27573
9989-03-40-0170.000
1747
DW -37
NA
JEFFERS, DENNIS W & SHONDA BUMP
225 DUNNAWAY RD
156 MAGGIE LN, ROXBORO, NC 27573
9988-01-49-1710.000
1961
DW -38I
NA
ICURRIE, MAGGIE J
167 DUNNAWAY
RD
167 DUNNAWAY RD , SEMORA, NC 27343
1 9988-01-49-8582.000
2264
P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment - PCR72\Tables\Table 2-1 Water supply well property owner Info Page 1 of 2

TABLE 2-1
WATER SUPPLY WELL PROPERTY OWNERS INFORMATION
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
Notes:
0 - Possible water supply well.
0 - Reported/Observed water supply well.
0 - Water supply well or spring reported by property owner.
NA - Not available
LNK - Unknown
Prepared By: TCP Checked By: RBI
Last Revised: July 27, 2016
Municipal includes County, City, or other municipal water source(s). Parcel ID, owner and well location address information were obtained from the Person County, North Carolina website(http://www,pemoncounty.net/index.aspx?page=138).
P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment - PCR72\Tables\Table 2-1 Water supply well property owner Info Page 2 of 2
SOURCES
OF
DRINKING
WATER
APPROXIMAT
E DISTANCE
w
FROM
PUBLIC
W
COMPLIANCE
WELL WELL CASING OR
MAPWATER
.V.
W =
BOUNDARY
DEPTH OPEN HOLE WELL SCREEN
WELL ID
SYSTEM
PROPERTY OWNER
PROPERTY ADDRESS
OWNER ADDRESS
PARCEL ID NUMBER
f 3 p
(FEET) I
(FEET) I DEPTH (FEET) INTERVAL (FEET)
DW -39
NA
ESTES, LARRY THOMAS & FAYE
3291 MCGHEES MILL RD
3291 MCGHEES MILL RD , SEMORA, NC 27343
9988-02-59-1781.000
2268
DW -40
NA
GRAY, BOBBY R LIFE ESTATE
3773 MCGHEES MILL RD
3276 MCGHEES MILL RD, SEMORA , NC 27343
9988-02-59-8579.000
Y
2630
DW -41
NA
GRAY, BOBBY R LIFE ESTATE
3773 MCGHEES MILL RD
3276 MCGHEES MILL RD, SEMORA , NC 27343
9988-02-59-8579.000
Y
2693
DW -42
NA
CLAYTON, RANDY WILKINS
520 ARCHIE CLAYTON RD
1027 COUNTRY CLUB RD, ROXBORO, NC 27574
9988-01-36-0728.000
1227
DW -43
NA
BARTS,EUGENE
462 ARCHIE CLAYTON RD
462 ARCHIE CLAYTON RD, ROXBORO, NC 27574
9988-01-36-5373.000
1418
DW -44
NA
LEWIS, LARRY M & JOAN T
430 ARCHIE CLAYTON RD
395 ARCHIE CLAYTON RD, ROXBORO, NC 27574
9988-01-36-7254.000
Y
1662
120 40
DW -45
NA
STEWART, CHARLES SR & ALICE D
507 ARCHIE CLAYTON RD
507 ARCHIE CLAYTON RD , ROXBORO, NC 27574
9988-01-35-4944.000
Y
1534
110 35
DW -46
PWS'
PERSON COUNTY NORTH CAROLINA
7391 SEMORA RD
304 S MORGAN ST RM 219, ROXBORO, NC 27573
9978-02-56-5922.000
Y
2250
280 40
0273431
Woodland
DW -47
Elementary
PERSON COUNTY NORTH CAROLINA
7391 SEMORA RD
304 S MORGAN ST RM 219, ROXBORO, NC 27573
9978-02-56-5922.000
Y
2319
605 79
Scool
DW -48
NA
TBS REALTY INC
7275 SEMORA RD
1226 HASSELL HORTON RD, HURDLE MILLS, NC 2751
9978-02-66-1992.000
1971
DW -49
NA
CERTAINTEED GYPSUM NC INC
921 A SHORE RD
921 A SHORE RD , SEMORA , NC 27343
9989-01-16-5827.000
534
DW -50
PRW-3
NA
CHAMBERS, DONALD L & DELLA M
4300 MCGHEES MILL RD
4300 MCGHEES MILL RD , SEMORA , NC 27343
9989-04-74-1639.000
Y
2342
405
DW -51
NA
CLAYTON, JANIE C & OTHERS
COW PASTURE LN
424 ROY CARVER RD, SEMORA, NC 27343
9989-01-18-0104.000
Y
2287
DW -52
PRW-5
NA
FARMAN, DAVID & JANIE
101 DUNNAWAY RD
101 DUNNAWAY RD, SEMORA, NC 27343
9968-01-49-7632.000
Y
2133
DW -53
NA
JORDAN, FRANK & BETTIE
DUNNAWAY RD
714 LONGS STORE RD, ROXBORO, NC 27574
9988-01-39-4609.000
Y
1775
50 4 x 4-16 (?)
DW -54
PRW-1
NA
LANGLEY, MARY & MCKINNEY DEBRA
137 COW PASTURE LN
137 COW PASTURE LN, SEMORA, NC 27343
9989-01-08-7367.000
Y
2589
420
DW -55
NALEWIS,
L MICHAEL
395 ARCHIE CLAYTON RD
395 ARCHIE CLAYTON RD ROXBORO, NC 27574
9988-01-36-6080.000
Y
1805
120 40
PRW-7
,
DW -56
NA
R&S CARVER PROP & CLAYTON JANI
SHORE ACRES DR
1120 MORTON PULLIAM RD, ROXBORO, NC 27574
9989-01-28-0462.000
Y
2444
700 70
DW -57
NA
SANFORD, CHAD L
556 DAISY THOMPSON RD
556 DAISY THOMPSON RD ROXBORO, NC 27574
9988-00-14-0931.000
Y
883
PRW-9
,
DW -58
NA
WAGSTAFF FARMS LLC
5310 SEMORA RD
31 REAMS AVE, ROXBORO, NC 27573
9978-04-91-8682.000
Y
1522
DW -59
NA
WELBORNE, ENIDA P & ANTHONY M
DUNNAWAY RD
5139 RANDLEMAN RD, GREENSBORO, NC 27406
9988-01-49-5741.000
Y
2119
DW -60
NA
CARVER, DORIS & GILLIAM, VICKI B
MCGHEES MILL RD
PO BOX 560, ROXBORO, NC, 27573
9989-02-96-2190.000
Y
3250
DW -61
NA
HAMLETT, LAMBERTH & EVELYN
2897 MCGHEES MILL RD
2897 MCGHEES MILL RD, SEMORA, NC 27343
9988-02-57-2591.000
Y
2871
DW -62
NA
LOFTIS, JIMMIE & GLADYS
311 ARCHIE CLAYTON RD
311 ARCHIE CLAYTON RD, ROXBORO, NC 27574
9988-01-35-9665.000
Y
2257
DW -63
NA
SERRANO, LILLIE
360 ARCHIE CLAYTON RD
360 ARCHIE CLAYTON RD, ROXBORO, NC 27574
9988-01-45-1942.000
Y
2388
DW -64
NA
KNOTT, LOIS W. LIFE/ ESTATE
5837 ALLENSVILLE RD
5837 ALLENSVILLE RD, ROXBORO, NC 27574
0936-00-21-9428.000
Y
2018
PRW-2
NA
ROYSTER, MARTHA ESTATE
224 MARTHA ROYSTER RD
1665 MONROE AVE APT 1B, BRONX, NY 10457
9989-01-07-2923.000
2363
PRW-4
NA
WALKER, WILLIAM & WENDY
3469 MCGHEES MILL RD
3469 MCGHEES MILL RD , SEMORA, NC 27343
9989-04-50-4836.000
1139
P21-6NA
LEWIS L MICHAEL
1395 ARCHIE CLAYTON RD
1461 ARCHIE CLAYTON RD, ROXBORO, NC 27574
9988-01-35-5942.000
1635
PRW-8
NA
ROLISON, ROBERT SCOTT
1571 DAISY THOMPSON RD
1571 DAISY THOMPSON RD, ROXBORO, NC 27574
9988-01-05-4153.000
623
Notes:
0 - Possible water supply well.
0 - Reported/Observed water supply well.
0 - Water supply well or spring reported by property owner.
NA - Not available
LNK - Unknown
Prepared By: TCP Checked By: RBI
Last Revised: July 27, 2016
Municipal includes County, City, or other municipal water source(s). Parcel ID, owner and well location address information were obtained from the Person County, North Carolina website(http://www,pemoncounty.net/index.aspx?page=138).
P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment - PCR72\Tables\Table 2-1 Water supply well property owner Info Page 2 of 2

TABLE 5-1
WASTEWATER SAMPLE PARAMETERS AND ANALYTICAL METHODS
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA
PARAMETER
REPORTING LIMIT
UNITS
METHOD
FIELD PARAMETERS
H
NA
SU
Field Water Quality Meter
Specific Conductance
NA
µS/cm
Field Water Quality Meter
Temperature
NA
oC
Field Water Quality Meter
Dissolved Oxygen
NA
m /L
Field Water Quality Meter
Oxidation Reduction Potential
NA
mV
Field Water Quality Meter
Turbidity
NA
INTU
I Field Water Quality Meter
Ferrous Iron
NA
m /L
Field Test Kit
INORGANICSNote i
Aluminum
0.005
m /L
EPA 200.7 or 6010C
Antimony
0.001
m L
EPA 200.8 or 6020A
Arsenic
0.001
m /L
EPA 200.8 or 6020A
Barium
0.005
m L
EPA 200.7 or 6010C
Beryllium
0.001
m /L
EPA 200.8 or 6020A
Boron
0.05
m L
EPA 200.7 or 6010C
Cadmium
0.001
m /L
EPA 200.8 or 6020A
Chromium
0.001
m L
EPA 200.7 or 6010C
Hexavalent Chromium"°te 2
0.00003
mg/L
EPA 218.7
Cobalt
0.001
m /L
EPA 200.8 or 6020A
Copper
0.005
m L
EPA 200.7 or 6010C
Iron
0.01
m /L
EPA 200.7 or 6010C
Lead
0.001
m L
EPA 200.8 or 6020A
Manganese
0.005
m /L
EPA 200.7 or 6010C
Mercury low level
0.000012
m L
EPA 245.7 or 1631
Molybdenum
0.005
m /L
EPA 200.7 or 6010C
Nickel
0.005
m /L
EPA 200.7 or 6010C
Selenium
0.001
m /L
EPA 200.8 or 6020A
Strontium
0.005
m L
EPA 200.7 or 6010C
Thallium low level
0.0002
m /L
EPA 200.8 or 6020A
Vanadium low level
0.0003
m L
EPA 200.8 or 6020A
Zinc
10.005
1 m /L
JEPA 200.7 or 6010C
ANIONS/CATIONS
Alkalinity as CaCO3
20
m /L
SM 2320B
Bicarbonate
20
m L
SM 2320
Calcium
0.01
m /L
EPA 200.7
Carbonate
20
m L
SM 2320
Chloride
0.1
m /L
EPA 300.0 or 9056A
Magnesium
0.005
m L
EPA 200.7
Methane
0.1
m /L
RSK 175
Potassium
0.1
m L
EPA 200.7
Sodium
0.05
m /L
EPA 200.7
Sulfate
0.1
m /L
EPA 300.0 or 9056A
Sulfide
0.05
m /L
SM450OS-D
Total Dissolved Solids
25
m L
SM 2540C
Total Organic Carbon
0.1
m /L
SM 5310
Total Suspended Solids
2
m L
SM 2450D
RADIOLOGICAL
Uranium"°te z
0.00005
mg/L
ISW846 3010A/6020A
Radium"°te z
1
1 pCi/L
JEPA 904.0 or 9320 or 903.1
Notes:
1. Constituents in wastewater, surface water, and groundwater samples will be analyzed for total and
dissolved concentrations.
2. Groundwater analysis only.
NA indicates not applicable.
P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment - PCR72\Tables\Table 5-1 Wastewater
Parameters.xlsx

TABLE 5-2
SEDIMENT PARAMETERS AND ANALYTICAL METHODS
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, INC., SEMORA, NORTH CAROLINA
INORGANIC COMPOUNDS
UNITS
METHOD
Aluminum
mg/kg
EPA 6010C
Antimony
mg/kg
EPA 6020A
Arsenic
mg/kg
EPA 6020A
Barium
mg/kg
EPA 6010C
Beryllium
mg/kg
EPA 6020A
Boron
mg/kg
EPA 6010C
Cadmium
mg/kg
EPA 6020A
Calcium
mg/kg
EPA 6010C
Chloride
mg/kg
EPA 9056A
Chromium
mg/kg
EPA 6010C
Cobalt
mg/kg
EPA 6020A
Copper
mg/kg
EPA 6010C
Iron
mg/kg
EPA 6010C
Lead
mg/kg
EPA 6020A
Magnesium
mg/kg
EPA 6010C
Manganese
mg/kg
EPA 6010C
Mercury
mg/kg
EPA Method 7470A/7471B
Molybdenum
mg/kg
EPA 6010C
Nickel
mg/kg
EPA 6010C
Nitrate as Nitrogen
mg/kg
EPA 9056A
pH
SU
EPA 9045D
Potassium
mg/kg
EPA 6010C
Selenium
mg/kg
EPA 6020A
Sodium
mg/kg
EPA 6010C
Strontium
mg/kg
EPA 6010C
Sulfate
mg/kg
EPA 9056A
Thallium (low level) (SPLP Extract only)
mg/kg
EPA 6020A
Vanadium
mg/kg
EPA 6020A
Zinc
mg/kg
EPA 6010C
Sediment Specific Samples
Cation exchange capacity
meg/100g
EPA 9081
Particle size distribution
%
ASTM D422
Percent solids
%
ASTM D2216
Percent organic matter
%
EPA/600/R-02/069
Redox potential
I mV
Faulkner et al. 1898
Notes:
1. Sediment samples to be analyzed for Total Inorganics using USEPA Methods 6010/6020 and pH using
USEPA Method 9045, as noted above.
P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment - PCR72\Tables\Table 5
2 Sediment Parameters.xlsx

TABLE 5-3
GROUNDWATER SAMPLE PARAMETERS AND ANALYTICAL METHODS
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA
PARAMETER
REPORTING LIMIT
UNITS
METHOD
FIELD PARAMETERS
H
NA
SU
Field Water Quality Meter
Specific Conductance
NA
µS/cm
Field Water Quality Meter
Temperature
NA
oC
Field Water Quality Meter
Dissolved Oxygen
NA
m /L
Field Water Quality Meter
Oxidation Reduction Potential
NA
mV
Field Water Quality Meter
Turbidity
NA
INTU
I Field Water Quality Meter
Ferrous Iron
NA
m /L
Field Test Kit
INORGANICSNote i
Aluminum
0.005
m /L
EPA 200.7 or 6010C
Antimony
0.001
m L
EPA 200.8 or 6020A
Arsenic
0.001
m /L
EPA 200.8 or 6020A
Barium
0.005
m L
EPA 200.7 or 6010C
Beryllium
0.001
m /L
EPA 200.8 or 6020A
Boron
0.05
m L
EPA 200.7 or 6010C
Cadmium
0.001
m /L
EPA 200.8 or 6020A
Chromium
0.001
m L
EPA 200.7 or 6010C
Hexavalent Chromium"°te 2
0.00003
mg/L
EPA 218.7
Cobalt
0.001
m /L
EPA 200.8 or 6020A
Copper
0.005
m L
EPA 200.7 or 6010C
Iron
0.01
m /L
EPA 200.7 or 6010C
Lead
0.001
m L
EPA 200.8 or 6020A
Manganese
0.005
m /L
EPA 200.7 or 6010C
Mercury low level
0.000012
m L
EPA 245.7 or 1631
Molybdenum
0.005
m /L
EPA 200.7 or 6010C
Nickel
0.005
m /L
EPA 200.7 or 6010C
Selenium
0.001
m /L
EPA 200.8 or 6020A
Strontium
0.005
m L
EPA 200.7 or 6010C
Thallium low level
0.0002
m /L
EPA 200.8 or 6020A
Vanadium low level
0.0003
m L
EPA 200.8 or 6020A
Zinc
10.005
1 m /L
JEPA 200.7 or 6010C
ANIONS/CATIONS
Alkalinity as CaCO3
20
m /L
SM 2320B
Bicarbonate
20
m L
SM 2320
Calcium
0.01
m /L
EPA 200.7
Carbonate
20
m L
SM 2320
Chloride
0.1
m /L
EPA 300.0 or 9056A
Magnesium
0.005
m L
EPA 200.7
Methane
0.1
m /L
RSK 175
Potassium
0.1
m L
EPA 200.7
Sodium
0.05
m /L
EPA 200.7
Sulfate
0.1
m /L
EPA 300.0 or 9056A
Sulfide
0.05
m /L
SM450OS-D
Total Dissolved Solids
25
m L
SM 2540C
Total Organic Carbon
0.1
m /L
SM 5310
Total Suspended Solids
2
m L
SM 2450D
RADIOLOGICAL
Uranium"°te z
0.00005
mg/L
ISW846 3010A/6020A
Radium"°te z
1
1 pCi/L
JEPA 904.0 or 9320 or 903.1
Notes:
1. Constituents in wastewater, surface water, and groundwater samples will be analyzed for total and
dissolved concentrations.
2. Groundwater analysis only.
NA indicates not applicable.
P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment - PCR72\Tables\Table 5-3 Groundwater
Monitoring Parameters.xlsx

Ash Basin Extension Impoundments and Discharge Canals Assessment Work Plan August 2016
Roxboro Steam Electric Plant
FI 9 ► O. 11
NPDES PERMIT NC0003425
SynTerra
P: \Duke Energy Progress.1026\ 107. Roxboro Ash Basin GW Assessment Plan\27.Ash Basin Assessment -
PCR72 \ Extension Impoundment Discharge Canals Work Plan Aug 2016.docx

�r Permit NC0003425 ' '
Plaintiffs Exhibit
14 DEProgress
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DMSION OF WATER QUALITY .
P. ET_
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELiMZNATIf. N SYSTEM
In compliance with the provision of Norah Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
Carolina Power and Light Company d/b/a/ Progress Energy
Carolinas, Inc.
is hereby authorized• to discharge wastewater firom a facility located at the
Roxboro Steam Eleetsic Generating Plant
NCSR 1377 near Roxboro
Person County
to receiving waters designated as Hyco Lake in the: Roanoke River Basin in accordance with
effluent limitations, monitoring requirements, rind other conditions set
IV hereof. forth in Parts I, U. III and
This permit shall become effective May 1, 2007.
This permit and the authorization to discharge shall expire at midnight on March 31' 2012.
Signed this day April 9, 2007.
r;
�AK Alan W. Klimek, P.E.
Director
Division of Water Quality
By Authority of the Environmental Management Commission
PAProgress Energy. 1 026\07. ROXBORO PLANT\LEGAL DEPARTMENT\NPDES permit

Permit NC0003425
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked.
As of this permit issuance, any previously issued permit bearing this number is no longer effective.
Therefore, the exclusive authority to operate and discharge from this facility arises under the permit
conditions, requirements, terms, and provisions inchided herein,
Carolina Power & Light Company d/b/a Progress Energy Carolinas,
Inc. is hereby authorized to:
I. Continue to operate the following systems located at Roxboro Steam
Electric Generating Plant off NCSR 1377 near Roxboro in Person County:
• Ash Pond Treatment System„ (Internal Outfall 002). To treat ash
transport, low volume wastewater, runoff from the ash landfill, dry flyash
handling system, wash water, coal pile runoff silo wash water, storm water
runoff, cooling tower blowdown from unit ,number 4, and domestic sewage
l-reatrnent plant effluent. Effluent from the ash pond discharges to the
heated water discharge canal, and is ultimately released into Hyco Lake
through Outfall 003.
• heated Water Discharge Canal System (Outfall 003). At the ,point that the
discharge canal enters Hyco Lake, it contains flow from several waste
streams including, once -through cooling water, stormwater runoff, and the
effluent front the ash pond (Outfall 002)..
• Cooling Tower Blorwdown System (Internal Outfall 005). Cooling tower
blowdown from unit number 4 discharges into the ash transport system, and
ultimately flows into the ash pond (Outfall 002).
• Coal Pile Runoff Treatment System (outfall 006). This system handles
runoff from the coral pile and other coal handling areas, including the
limestone and gypsum piles and the truck whell wash water. These waters
are routed to ra retention pond for treatment by neutralization,
sedimentation, and equalization prior to being discharged directly into Hyco
Lalce.
• Domestic Wastewater Treatment System (Interrnal Outfall 008). Effluent
from the treatment system flows into the ash pond. Effluent from the ash
pond discharges into the heated water discharge canal.
• Chemical Metal Cleaning Treatment System (Internal Outfall 009). This
wastest.ream may occasionally be discharged to the ash pond treatment
System. It contains chemical metal cleaning wastes. Effluent from the ash
pond discharges into the heated water discharge canal.
• Flue Gas Desulfurization Treatment System (Internal Outfall 010). This
waste steam is generated from blowdown from the FGD treatment unit. After
treatment its the bioreactors, effluent will be discharged into the heated
water discharge canal upstream from outfall 002, rand is ultimately released
into Hyco Lake through Outfall 003.
2. After receiving an Authorization to Construct from the Division, construct
and operate a Flue Gas Desulfurizettioll (FGD) wastewater treatment system
discharging to the ash pond discharge canal through internal outfall 002.
3. Discharge from said treatment works and/or outfalls at the locations
specified can the attached map into the Hyco Lake, classified as WS -V & B
waters in the Roanoke River Basin.
R\Progress Energy.1026\07.ROXBORO PLANT\LEGAL DEPARTMENT\NPDES permit

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PAProgress Energy. I 026\07.ROXBORO PLANTILEGAL DEPARTMENT\NPDES permit

Permit NC0003426
PART I: WASTEWATER MONITORING, CONTROLS AND LIMITATIONS
SPECIAL CONDITIONS
A (8). Acute Toxicity Testing PASS/FAIL Permit Limit (Quarterly)
The permittee shall conduct acute toxicity tests on a cgrlarferly basis using protocols defined in the North
Carolina Procedure Document entitled "Pass)Faii Methodology For Determining Acute Toxicity In A Single
Effluent Concentration" (Revised -July, 1992 or subsequent versions). The monitoring shall be performed
as a Fathead Minnow (Pimop/ ales prornelas) 24 hour static test. The effluent concentration at which there
may be at no time significant acrqe mortality is 90% (defined as treatment two in the procedure
document). Effluent samples for self-monitoring purposes must be obtained during representative effluent
discharge below all waste treatment. The tests will be performed during the months of March, June,
September and December.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR -1) for the month in which it was performed, using the parameter code TGE6C.
Additionally, DWQ Form AT -2 (original) is to be sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section /Aquatic Toxicology Unit
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filer) with the Environmental Sciences Branch no later
than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine
of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of
the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring Is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) lest form
indicating the facility name, permit number, pipe number, county, and the month/year of the report with the
notation of "No Flow" in the comment area of the form. The report shall be submitted to the Environmental
Sciences Branch at the address cited above.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring
will begin immediately until such time that a single test Is passed. Upon passing, this monthly test
requirement will revert to quarterly In the months specified above.
Should the permittee fail to monitor during a month In which toxicity monitoring is required, then monthly
monitoring will begin immediately tsritil such time that a single test is passed, Upon passing, this monthly
test requirement will revert to quarterly in the months specified above.
Should any test data from either these monitoring requirements or tests performed by the North Carolina
Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened
and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minknum control
organism survival and appropriate environmental controls, shall constitute an iinvalid test and will require
immediate follow-up testing to be completed no later than the last day of the month following the month of
the initial monitoring.
P:\Progress Energy. 1 026\07. ROXBORO PLANT\LEGAL DEPARTMENT\NPDES permit

Permit NC0003425
PART I: WASTEWATER MONITORING, CONTROLS AND LIMITATIONS
A. (9) Acute Toxicity Monitoring (ANNUAL)
The permittee shall conduct annual toxicity tests using protocols defined as definitive in ERA. Document
EPA/600/4-90/027 entllled "Methods for Measuring the Acute Toxicity of Effluents to Freshwater and
Marine Organisms_" The monitoring shall be performed as a Fathead Minnow (Pimephales Promotes) 24
hour static test. Effluent samples for self-monitoring purposes must be obtained below all waste treatment.
The permittee will conduct one test annually, with the annual period beginning In January of the calendar
year of the effective date of the permit. The annual test requirement must be performed and reported by
June 30. If no discharge reccurs by June 30, notification will be made to the Division by this (fate. Toxicity
testing will be performed on the next discharge event for the annual test requirement.
The parameter code for this test is TAE6C. All toxicity testing results required as part of this permit
condition will be entered on the Effluent Discharge Form (MIS -1) for the month in which it was performed,
using the appropriate parameter code. Additionally, DWO Form AT•i (original) is to be sent to the
following address:
Attention: NC DENR / DWO / Environmental Sciences Section / Aquatic Toxicology Unit
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data, Total residual chlorine
of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of
the waste Stream.
Should any test data from elther these monitoring requirernents or tests performed by the North Carolina
Division of Water quality indicate potential impacts to the receiving stream, this permit may be re -opened
and modified to include alternate monitoring requirements or limits,
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival and appropriate environmental controls, shall constitute an invalid test
and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
Should there be no discharge of flaw from the facility during any month, the permittee will complete the
information located at the top of the aquatic toxicity (AT) test form Indicating the facility name, permit
number, pipe number, county, and the month/year of the report with the notation of Flow"' in the
comment area of the form. The report shall be submitted to the Environmental Sciences. Branch at the
address cited above.
Should any test data from eltner these monitoring requirements or tests performed by the North Carolina
Divislon of Water (Duality Indicate potential impacts to the receiving stream, this permit may be re -opened
and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival and appropriate environmental controls, shall constitute an Invalid test and will require PART I: immediate
fallow -up testing to be completed no later than the last day of the month following the month of the initial
rnonitoring,
A. (10) Intake Screen Backwash Condition
Continued intake screen backwash discharge is permitted without limitations or monitoring requirements.
P:\Progress Energy.1026\07.ROXBORO PLANT\LEGAL DEPARTMENT\NPDES permit

Permit NC0003425
PART I: WASTEWATER MONITORING, CONTROLS AND LIMITATIONS
A. (11) Best Management Practices Plan
The Permittee shall continue to implement a Best Management Practices (BMP) Plan to control the
discharge of ails and the hazardous and toxic substances listed in 40 CFR, Part 117 and Tables II and III
of Appendix D to 40 CFR, Part 122. The plan shall include a listing of all potential sources of spills or
leaks of these materials, a method for containment, a description of training, inspection and security
procedures, and emergency response measures to be taken in the event of a discharge to surface waters.
Sources of such discharges may include, but are not limited to, materials storage area, in -plant site runoff,
and sludge and waste disposal areas. The BMP Flan shall continue to be maintained at the plant site and
small be available for inspection by EPA and DWQ Personnel.
A. (12) Temperature Requirements
a. Water quality standards for temperature will not apply within a mixing zone. which shall include
the North Hyco arm downstream of NC Flighway 57, the main body of Hyco Lake downstream of
the confluence of the Cobbs Creek Arm and the Nortlt Hyco Arm, and the entire afterbay lake.
The area described does not Include the South Hyco Arm or the first Finger arms on the west side
of the lake lying upstream of the dam.
b. All water discharged from the afterbay to Hyco River shall comply with all applicable standards
including temperature standards.
c. Water within the main lake and the afterbay lake to Hyco River shall comply with water quality
standards except the temperature standards in the areas of the lake defined herein as a mixing
zone.
d. Temperature measurements made to monitor compliance with this provision shall be made at
least six inches, but not more than one foot, below the surface of the lake. A monthly average
temperature shall consist of at least five determinations conducted an five separate nays.
e. Temperature increases shall be determined as the increase In temperature above the
temperature measured at the confluence of the two southern finger arms on the north side of the
lake (NC Grid coordinates North 1,005,000 — Cast 1,981,000).
A. (13) Biological Monitoring
In accordance with the previously submitted biological monitoring program (as approved by the Director of
the division of Water Quality, and as it may be amended), the Permittee shall submit results of biological
studies and monitoring programs in a manner and under schedule to be approved by the Director of the
Division of Water Quality.
A. (14) Cooling Tower Blowdown Discharge
Unit number 4 Cooling Tower Blowd'own shall not be discharged through the maintenance strain directly to
the heated water discharge canal, 'Slowdown may only be discharged through the ash transport system to
the ash pond.
A. (15) PCB Prohibition
There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for
transformer fluid.
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Permit NC0003425
PART I: WASTEWATER MONITORING, CONTROLS AND LIMITATIONS
A. (16) Limitations Reopener
The permit shall be modified, or revoked and reissued, to comply with any applicable effluent guideline or
water quality standard issued or approved under sections 302(b)(2)(c) and (d), 304(6)(2) and 307(x) of the
Clean Water Act, if the effluent guideline or water quality standard so issued or approved:
a. Con talns different conditions or is otherwise more stringent than any effluent limitation in the
permit; or
b. Controls a pollutant not limited in the permit.
The permit as modified or reissued under this. paragraph shall also contain any other requirements in the
Act then applicable.
A. (17) Domestic Wastewater Treatment Plant
The permittee shall at all times properly operate and maintain the domestic wastewater treatment plant to
meet secondary standards as specified in Part A (5).
A. (18) Bioreactor Condition
An operation and maintenance plan, Including a monitoring regimen for the bioreactor units and an
emergency response plan in the event of an upset, shall be maintained and available for inspe•.ction by
Division personnel..
PAProgress Energy. 1 026\07. ROXBORO PLANT\LEGAL DEPARTMENT\NPDES permit