NC0001422_Other_20160503

(� DUKE
�7 ENERGY.
April 28, 2016
Jeffrey O. Poupart
Water Quality Permitting Section Chief
Division of Water Resources
Department of Environmental Quality
State of North Carolina
1617 Mail Service Center
Raleigh, NC 27699-1617
Harry K. Sidens
Senior Vice President
Environmental, Health & Safety
526 S Church Street
Mail Code EC3XP
Charlotte, NC 28202
[phone]
Subject: March 2, 2016 insufficiency of Discharge Assessment Plans — Duke Energy Carolinas,
LLC and Duke Energy Progress, LLC
Dear Mr. Poupart:
This responds to your letter of March 2, 2016 to Duke Energy Carolinas, LLC and Duke Energy
Progress, LLC on March 2, 2016 regarding Duke Energy's proposed Discharge Assessment
Plans.
With regard to your letter describing changes in Section 3.2.2 Observation and Sampling:
• The discussion must include a statement noting that jurisdictional determinations regarding
the extent of waters of the United States and their relationship with identified seeps at the
subject facilities will be obtained from the United States Army Corps of Engineers (USA
COE).
Duke Energy does not yet have jurisdictional determinations from the US Army Corps of
Engineers for the relevant areas at all of the twelve sites mentioned in your letter. We submitted
applications for jurisdictional determinations in September, October, and November 2015 and
have since worked with the Corps of Engineers to schedule site visits and provide draft plats for
approval. Nonetheless, the timing of the approved jurisdictional determinations is up to the
Corps and outside of Duke's control. To date, out of these twelve sites, only Buck has an
approved jurisdictional determination, but we do not yet have the signed plats.
We will submit the maps you have requested for each site on a rolling basis, within a reasonable
period after the jurisdictional determinations are complete. In order to address the changes
described in your March 2, 2016 letter, we have added the following text at the start of Section
3.2.2.
Jurisdictional determinations regarding the extent of waters of the United States and
their relationship with identified seeps at the subject facilities will be obtained from the
United States Army Corps of Engineers (USA COE). Until jurisdictional determinations
are finalized by USA COE, preliminary information will be used to evaluate the seeps as
described in the section below.
lRECEWD/NCDEQ/DWR
MAY 0 $ 2016
Water Quality
Permitting Seggn

The second change in Section 3.2.2 described in your letter is as follows.
• The schedule for water quality sampling of the seeps and related jurisdictional waters must
be more frequent than the semi-annual basis stated in the proposed DAPs. DWR
recommends a monthly monitoring schedule, consistent with the conditions described in the
DAPs' general assessment requirements, for all identified seeps that will continue for twelve
( 12) months. After that time, monitoring may be reduced to a semi-annual basis until such
monitoring becomes a requirement of the NPDES permit.
We do not believe sampling monthly as part of a revised Discharge Assessment Plan is
warranted. For the larger receiving waters, data is available from sampling associated with
NPDES permits that demonstrates the lack of impact on the larger surface waters of the state.
In addition, we are conducting weekly observations of all AOWs on a dam or dike slope,
sampling any new seeps, and providing the analytical results to DEQ. We recommend the
sampling frequency under the DAPs remain at twice/year with the weekly inspections of dam
slopes for any new seeps with data provided to DEQ. We recommend that we collectively focus
our resources on the completion of all of the NPDES Wastewater Permits for the Duke Energy
sites and implement appropriate sampling frequency for each of the permitted seeps in that
document.
However, in order to address the changes described in your March 2, 2016 letter, we have
added the following text in Section 3.2.2.
In addition to sampling conducted with the semi-annual assessments, additional seep
sampling will be conducted at locations and at a frequency as determined through
discussions with NC DEO personnel.
We would like to work with DEQ to achieve alignment of the various (present and future)
documents involving required seep activities including:
• Discharge Assessment Plans
• Discharge Identification Plans
• NPDES Wastewater Permits
• EPA requirements
• Any future legal agreements with either DEQ or EPA
Duke Energy is committed to providing the Department with additional information to facilitate
the issuance of new NPDES Wastewater permits. The issues are complex and require special
consideration, as illustrated by the time elapsed since the permit applications were submitted.
We look forward to working with you further to resolve the issues identified here on a mutually
acceptable schedule.
Sincerely,
Harry Sideris
Senior Vice President
Environmental, Health and Safety

Sutton Energy Complex Ash Basin
Topographic Map and
Discharge Assessment Plan
NPDES Permit NC0001422
April 29, 2016

Contents
Duke Energy Progress, LLC I Discharge Assessment Plan ���
Sutton Energy Complex Ash Basin
CONTENTS
Paqe
Contents......................................................................................................................................i
Figuresand Tables.....................................................................................................................
ii
Section1 -
Introduction..............................................................................................................
1
Section 2 -
Site Background.......................................................................................................
3
2.1
Plant Description..................................................................................................3
2.2
Ash Management Description..............................................................................3
2.3
Site Geologic/Soil Framework..............................................................................3
2.4
Topographic Map and Identification of Discharges
...............................................4
Section 3 -
Discharge Assessment Plan.....................................................................................
6
3.1
Purpose of Assessment.......................................................................................6
3.2
Assessment Procedure........................................................................................6
3.2.1 General Assessment Requirements.........................................................6
3.2.2 Observation and Sampling.......................................................................6
3.2.3 Evaluation................................................................................................9
3.2.4 Assessment Reporting.............................................................................9
Section4 -
References..............................................................................................................10

Duke Energy Progress, LLC I Discharge Assessment Plan J �1�
Sutton Energy Complex Ash Basin
FIGURES AND TABLES
Figures and Tables
Figure 1 — Site Location Map
Figure 2 — Topographic Map
Table 1 — Laboratory Analytical Methods
Table 2 — Sutton Energy Complex Ash Basin — Example of Surface Water/Seep Monitoring Flow
and Analysis Results Table

Duke Energy Progress, LLC I Discharge Assessment Plan �1�
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SECTION 7 -INTRODUCTION
Section 1 - Introduction
The purpose of this document is to address the requirements of North Carolina General Statute
(GS)l 30A-309.21 0(a) topographic map and (b) Assessment of Discharges from Coal
Combustion Residuals Surface Impoundments to the Surface Waters of the State, as modified
by North Carolina Senate Bill 729, for the Sutton Energy Complex (Sutton Plant) ash basin
operated under National Pollutant Discharge Elimination System (NPDES) Permit NC0001422.
The following requirements are contained in General Statute (GS) 130A-309.210(a):
(1) The owner of a coal combustion residuals surface impoundment shall identify all
discharges from the impoundment as provided in this subsection. The requirements for
identifying all discharges from an impoundment set out in this subsection are in addition
to any other requirements for identifying discharges applicable to the owners of coal
combustion residuals surface impoundments.
(2) No later than December 31, 2014, the owner of a coal combustion residuals surface
impoundment shall submit a topographic map that identifies the location of all (i)
outfalls from engineered channels designed or improved for the purpose of collecting
water from the toe of the impoundment and (ii) seeps and weeps discharging from the
impoundment that are not captured by engineered channels designed or improved for
the purpose of collecting water from the toe of the impoundment to the Department.
The topographic map shall comply with all of the following:
a. Be at a scale as required by the Department.
b. Specify the latitude and longitude of each toe drain outfall, seep, and weep.
c. Specify whether the discharge from each toe drain outfall, seep, and weep is
continuous or intermittent.
d. Provide an average flow measurement of the discharge from each toe drain outfall,
seep, and weep including a description of the method used to measure average flow.
e. Specify whether the discharge from each toe drain outfall, seep, and weep identified
reaches the surface waters of the State. If the discharge from a toe drain outfall,
seep, or weep reaches the surface waters of the State, the map shall specify the
latitude and longitude of where the discharge reaches the surface waters of the
State.
f. Include any other information related to the topographic map required by the
Department.
The following requirements are contained in General Statute (GS) 130A-309.210(b):
b) Assessment of Discharges from Coal Combustion Residuals Surface Impoundments to
the Surface Waters of the State. The owner of a coal combustion residuals surface
impoundment shall conduct an assessment of discharges from the coal combustion

Duke Energy Progress, LLC I Discharge Assessment Plan �1
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SECTION 1 -INTRODUCTION
I
residuals surface impoundment to the surface waters of the State as provided in this
subsection. The requirements for assessment of discharges from the coal combustion
residuals surface impoundment to the surface waters of the State set out in this
subsection are in addition to any other requirements for the assessment of discharges
from coal combustion residuals surface impoundments to surface waters of the State
applicable to the owners of coal combustion residuals surface impoundments.
(1) No later than December 31, 2014, the owner of a coal combustion residuals surface
impoundment shall submit a proposed Discharge Assessment Plan to the
Department. The Discharge Assessment Plan shall include information sufficient to
allow the Department to determine whether any discharge, including a discharge
from a toe drain outfall, seep, or weep, has reached the surface waters of the State
r
and has caused a violation of surface water quality standards. The Discharge
Assessment Plan shall include, at a minimum, all of the following:
a. Upstream and downstream sampling locations within all channels that could
potentially carry a discharge.
b. A description of the surface water quality analyses that will be performed.
c. A sampling schedule, including frequency and duration of sampling activities.
d. Reporting requirements.
e. Any other information related to the identification of new discharges required by
the Department.
(2) The Department shall approve the Discharge Assessment Plan if it determines that
the Plan complies with the requirements of this subsection and will be sufficient to
protect public health, safety, and welfare; the environment; and natural resources.
(3) No later than 30 days from the approval of the Discharge Assessment Plan, the
owner shall begin implementation of the Plan in accordance with the Plan's
schedule.
The North Carolina Senate Bill 729 establishes the submittal date of this topographic map and
Discharge Assessment Plan no later than December 31, 2014.
The Sutton Energy Complex ash basin does not currently have any known unpermitted
discharges; however, if any locations were identified, the topographic map, developed to satisfy
the requirements of GS1 30A-309.21 0(a), would be utilized as the basis for developing the
assessment procedures presented in this plan, required by GS1 30A-309.21 0(b).
2

Duke Energy Progress, LLC I Discharge Assessment Plan �1�
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SECTION 2 - SITE BACKGROUND
Section 2 - Site Background
2.1 Plant Description
The Sutton Plant is a former coal-fired electricity -generating facility located in New Hanover
County, North Carolina, near the City of Wilmington (Figure 1). The Sutton Plant started
- operations in 1954. As of November 2013, all of the coal-fired units were retired when a new,
natural gas -fired combined -cycle unit began operation. The facility is located of Wilmington on
the west side of Highway 421. The topography around the property is relatively gentle, generally
sloping downward toward the Cape Fear River. The Sutton Plant utilizes an approximate 1,100-
acre cooling pond located adjacent to the Cape Fear River. The ash management area is
located adjacent to the cooling pond, north of the Sutton Plant.
2.2 Ash Management Description
The Sutton Plant, cooling pond and ash management area are located on the east side of the
Cape Fear River. The ash management area is located adjacent to the cooling pond, north of
Sutton Plant. The ash management area consists of:
• A former ash disposal area located south of the ash basins, on the south side of
the canal;
• An ash basin built in approximately 1971 (old ash basin); and
• A clay -lined ash basin built in approximately 1984 (new ash basin) and located toward
the northern portion of the ash management area.
The ash basins are impounded by an earthen dike. The ash basin system was an integral part
of Sutton Plant's wastewater treatment system which received inflows from the ash removal
system, Sutton Plant yard drain sump, and stormwater flows. During coal-fired electrical
generation, inflows to the ash basins were highly variable due to the cyclical nature of the
operations. The Sutton Plant NPDES permit authorizes the discharge of cooling pond
blowdown, recirculation cooling water, non -contact cooling water and treated wastewater from
Internal Outfalls 002, 003, 004 via Outfall 001 from,the cooling pond to the Cape Fear River.
The 500-foot compliance boundary circles the ash basins and former ash disposal area.
2.3 Site Geologic/Soil Framework
According to the Geologic Map of North Carolina, published by the North Carolina Department
of Natural Resources and Community Development (1985), the Sutton Plant lies within the
Coastal Plain Physiographic Province.
The North Carolina Coastal Plain is approximately 90 to 150 miles wide from the Atlantic Ocean
westward to its boundary with the Piedmont province. Two natural subdivisions of the Coastal
Plain were described by Stuckey (1965): the Tidewater region and the Inner Coastal Plain.
Sutton Plant is located within the Tidewater region, which consists of the coastal area where
large streams and many of their tributaries are affected by ocean tides (Winner, Jr. and Coble,
1989). Sutton Plant is located on the east side of the Cape Fear River within the alluvial plain
between the coastal dunes and the interior uplands (NUS Corporation, 1989).
3

Duke Energy Progress, LLC I Discharge Assessment Plan ���
Sutton Energy Complex Ash Basin
SECTION 2 -SITE BACKGROUND
The Coastal Plain comprises a wedge-shaped sequence of stratified marine and nonmarine
sedimentary rocks deposited on crystalline basement. The sedimentary sequences range in age
from recent to lower Cretaceous (Narkunas, 1980).
In the eastern part of the North Carolina Coastal Plain, groundwater is obtained from the
surficial, Castle Hayne, and Peedee aquifers. The Coastal Plain groundwater system consists of
aquifers comprised of permeable sands, gravels, and limestone separated by confining units of
less permeable material.
Unconformably, underlying the surficial aquifer, which has an average thickness of 35 feet, is
the Castle Hayne confining unit, with an average thickness of 20 feet. The Castle Hayne aquifer
is composed of fine-grained sand, interbedded with gray shell limestone and shell fragments.
Sand beds contain varying amounts of dark green weathered glauconite. Shells are common
throughout the aquifer. The average thickness of the aquifer is 60 feet in the northern
Wilmington area.
In the Wilmington area, the Peedee confining unit has an average thickness of 10 feet. The
Peedee Formation, which underlies the Upper Castle Hayne Formation, contains fine to medium
grained sand interbedded with gray to black marine clay and silt. Sand beds are commonly gray
or greenish gray and contain varying amounts of glauconite. Thin beds of consolidated
calcareous sandstone and impure limestone are interlayered with the sands in some places.
According to Winner, Jr. and Coble (1989), the surficial aquifer consists primarily of fine sands,
clays, shells, peat beds, and scattered deposits of coarse -grained material in the form of relic
beach ridges and floodplain alluvium. The areal extent of the surficial aquifer in the Coastal
Plain is approximately 25,000 square miles with an average thickness of 35 feet. The average
estimated hydraulic conductivity is 29 feet per day (Winner, Jr. and Coble, 1989).
Water level maps for the site indicate the general direction of groundwater flow appears to be
radial from the ash management area with flow toward the north, east, and south. However, the
water level elevation of the cooling pond is lower than the groundwater elevation measured in a
number of nearby monitoring wells, indicating a component of groundwater flow from the ash
management area would also be toward the west.
2.4 Topographic Map and Identification of Discharges
A topographic map is presented in Figure 2 to meet the requirements of GS 130A-309.210(a) in
the identification of outfalls from engineered channels, as well as seeps and weeps.
Seepage is the movement of wastewater from the ash basin through the ash basin
embankment, the embankment foundation, the embankment abutments, basin rim, through
residual material in areas adjacent to the ash basin. A seep is defined in this document as an
expression of seepage at the ground surface. A weep is understood to have the same meaning
as a seep.
Indicators of seepage include areas where water is observed on the ground surface and/or
where vegetation suggests the presence of seepage. Seepage can emerge anywhere on the
downstream face, beyond the toe, or on the downstream abutments at elevations below normal

Duke Energy Progress, LLC I Discharge Assessment Plan �1
Sutton Energy Complex Ash Basin J
SECTION 2 - SITE BACKGROUND
pool. Seepage may vary in appearance from a "soft," wet area to a flowing "spring." Seepage
may show up first as only an area where the vegetation is lusher and darker green than
surrounding vegetation. Cattails, reeds, mosses, and other marsh vegetation often become
established in a seepage area. However, in many instances, indicators of seeps do not
necessarily indicate the presence of seeps. Areas of apparent iron staining and/or excess iron
bacteria may also indicate the presence of a seep.
The Sutton Energy Complex ash basin does not currently have any known unpermitted
discharges; however, if any locations were identified, locations of seepage at the ground surface
adjacent to the ash basin would be shown on Figure 2. This figure would include drainage
features, or outfalis, associated with the ash basin dam as required by GS 130A-
309.210(a)(2)(i) and seeps as required by GS 130A-309.210(a)(2)(ii).
5

Duke Energy Progress, LLC I Discharge Assessment Plan ���
Sutton Energy Complex Ash Basin
SECTION 3 - DISCHARGE ASSESSMENT PLAN
Section 3 - Discharge Assessment Plan
3.1 Purpose of Assessment
The purpose of the assessment is to determine whether existing, known discharges from toe
drain outfalls, seeps, and weeps associated with the coal combustion residuals surface
impoundment (ash basin) have reached the surface waters of the State and have caused a
violation of surface water quality standards as required by North Carolina General Statute 130A-
309.210(b). Had discharges been identified, Figure 2 and a summary table of discharges would
present the locations to be considered as part of this Discharge Assessment Plan (DAP).
These locations would then be assessed by comparing surface water sampling analytical results
of the associated background location with the corresponding downstream location.
3.2 Assessment Procedure
The assessment procedure that would be associated with the Sutton Plant ash basin if
unpermitted discharges were identified is provided within this section. In addition to the specific
requirements for the assessment, Section 3.2 also provides the general requirements, the
frequency of assessment, documentation requirements, and a description of the surface water
quality analyses that will be performed.
3.2.1 General Assessment Requirements
Assessments are to be performed in three phases as follows:
• Observation and sampling (assessment site visit),
• Evaluation, and
• Assessment reporting
The assessment site visit would be performed when the background and downstream locations
are accessible and not influenced by weather events. Locations on or adjacent to the ash basin
embankments would be performed within two months after mowing, if possible. In addition, the
assessment site visit would not be performed if the following precipitation amounts have
occurred in the respective time period preceding the planned assessment site visit:
• Precipitation of 0.1 inches or greater within 72 hours or
• Precipitation of 0.5 inches or greater within 96 hours.
The assessments would be performed under the direction of a qualified Professional Engineer
or Professional Geologist on a semi-annual basis within two nonadjacent quarters. The date of
the initial assessment site visit would be selected no later than 30 days from the approval of the
Discharge Assessment Plan and would fall within one of the semi-annual timeframes. Additional
seep locations that may have been identified and documented in an Identification of New
Discharge report(s) would be reviewed prior to performing an assessment site visit, if available.
3.2.2 Observation and Sampling
Jurisdictional determinations regarding the extent of waters of the United States and their
relationship with identified seeps at the subject facilities will be obtained from the United States
6

Duke Energy Progress, LLC I Discharge Assessment Plan ���
Sutton Energy Complex Ash Basin
SECTION 3 - DISCHARGE ASSESSMENT PLAN
Army Corps of Engineers (USACE). Until jurisdictional determinations are finalized by USACE,
preliminary information will be used to evaluate the seeps as described in the section below.
The initial assessment site visit would be performed to document baseline conditions of the
discharge channel, including location, extent (i.e., dimensions of affected area), and flow of
each discharge. Discharge channel background and downstream locations would be verified
using a Global Positioning System (GPS) device. Photographs would be taken from vantage
points that can be replicated during subsequent semi-annual assessments.
Initial and subsequent assessment site visits would document a minimum of the following to
respond to the requirements in 130A-309.21 0.1 (b):
• Record the most recent ash basin water surface elevation and compare to the seep and
outfall and associated discharge location surface water elevations.
• For each discharge channel, the observer would note the following as applicable on the
day of the assessment site visit:
o Is the discharge channel flowing at the time of the assessment site visit?
o Does the discharge channel visibly flow into a Water of the U.S. at the time of the
assessment site visit?
o How far away is the nearest Water of the U.S.?
o Document evidence that flow has or could reach a Water of the U.S. (e.g.,
description of flow, including extent and/or direction) and describe the observed
condition. Evidence that flow could or has reached a Water of the U.S. may be
indicated by an inspection of the adjacent and downstream topographic drainage
features.
o Observe and document the condition of the discharge channel and outfall of the
engineered channel or seep location with photographs. Photographs are to be
taken from similar direction and scale as photographs taken during the initial
assessment site visit.
• Record flow rate within the discharge channel, if measureable, using the following
methods:
o Timed -volumetric method: Collect a volume of water from the discharge of the PVC
pipe directly into an appropriately sized container. Measure volumes (in mL) in the
field utilizing a graduated container. Record the amount of time (in seconds)
needed to collect the volume of water and calculate the flows (in MGD) for the
timed -volume.
o A V-notch weir apparatus will be installed, if necessary, during the initial
assessment site visit to impound seepage at locations with a defined channel.
Once the impounded seep reaches equilibrium discharge, flows will be measured
- using the timed -volumetric method described above.

Duke Energy Progress, LLC i Discharge Assessment Plan ���
Sutton Energy Complex Ash Basin
SECTION 3 - DISCHARGE ASSESSMENT PLAN
o Area -velocity method: Measure point velocities and water depth at a minimum of 20
stations along a transect setup perpendicular to the direction of flow using a
Swoffer® 3000 flow meter mounted to a standard United States Geologic Survey
(USGS) top -set wading rod. Utilize the average velocity and cross -sectional area of
the wetted channel to calculate flows in MGD.
• Collect water quality samples using the following methods:
o Collect background and downstream samples during a period with minimal
preceding rainfall to minimize potential effects of stormwater runoff. Sampling
procedures should prevent the entrainment of soils and sediment in water samples
that can result in analytical results not being representative of the flow. Because
Areas of Wetness (AOWs)/seeps often have poorly defined flow channels and
minimal channel depth, conventional grab samples collected directly into laboratory
containers or intermediate vessels is not possible without disturbance and
entrainment of soils and sediments. Further, many AOWs are contiguous with low-
lying areas subject to surface water runoff and resulting heavy sediment loading
during storm events or are near surface waters subject to flooding such that
representative samples of the AOW cannot be obtained. If the facility is unable to
obtain an AOW sample due to the dry, low flow or high flow conditions preventing
the facility from obtaining a representative sample, a "no flow" result or "excessive
flow" will be recorded.
o After collection, samples will be preserved and stored according to parameter -
specific methods and delivered to the laboratory under proper Chain -of -Custody
(COC) procedures.
o Analytical parameters for analysis include: Fluoride, Arsenic, Cadmium, Copper,
Chromium, Nickel, Lead, Selenium, and Mercury. This list includes all parameters
previously identified for seep sampling at Duke Energy power plants for which
relevant stream water quality standards are in place. (This list is responsive to the
statutory requirement for the discharge assessment to allow determination whether
discharges from toe drain outfalis, seeps, or weeps have reached surface waters
and caused a violation of surface water quality standards.) Analyses would be
conducted by Duke Energy's Huntersville Analytical Laboratory (NC Wastewater
Certification #248) and Pace Analytical Laboratories (NC Wastewater Certification
# 12). Laboratory analytical methods used for each constituent are provided in
Table 1.
o Seep in -situ measurements: In -situ field parameters (temperature and pH) would
be measured utilizing calibrated field meters either at the discharge of the seep
directly, at the discharge of the flow measurement devices, or in the water pool
created behind the device, if sufficient water depth did not exist at the device
discharge.
o Cape Fear River and Ash Basin Sample Collection Method: Water quality samples
and in -situ measurements from the Cape Fear River would be collected at a
I

Duce Energy Progress, LLC I Discharge Assessment Plan �1
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SECTION 3 - DISCHARGE ASSESSMENT PLAN
location upstream and downstream of the ash basin. Additionally, water samples
and in -situ measurements would be collected from an in -process ash basin
location. The grab samples would be collected from the river and basin's surface
r (0.3 m) directly into appropriate sample bottles.
• In addition to sampling conducted with the semi-annual assessments, additional seep
sampling will be conducted at locations and at a frequency as determined through
discussions with NC DEQ personnel.
3.2.3 Evaluation
Evaluation of the data from the initial assessment site visit would establish baseline conditions
and will serve as the basis for comparison for subsequent assessment site visit results.
Evaluation of observations and sampling results would include location, extent (i.e., dimensions
of affected area), and flow of each discharge. The analytical results of the upstream and
downstream locations would be compared to the 15A NCAC 213 standards for surface water
quality upon receipt to identify potential exceedances.
3.2.4 Assessment Reporting
Each assessment site visit would be documented by the individual performing the assessment,
as described in Section 3.2.2 to meet the requirements in 130A-309.21 0.1 (b). The report would
contain site background, observation and sampling methodology, and a summary of the
observations and descriptions of the discharge channels observed, changes in observations
compared to previous assessment events, estimates of flows quantities, and photographs of
discharges and outfalls of engineered channels designed or improved for collecting water from
the impoundment. Photographs would be numbered and captioned. The flow and analytical
results would be recorded and presented in tables similar to the example provided as Table 2.
The analytical results would be compared to the 15A NCAC 213 standards for surface water
quality and exceedances highlighted. This information would be compiled, reviewed, and
submitted to NC DEQ within 90 days from the Observation and Sampling event.
9

Duke Energy Progress, LLC I Discharge Assessment Plan �♦�
Sutton Energy Complex Ash Basin J
SECTION 4 - REFERENCES
Section 4 - References
Narkunas, J., 1980, Groundwater Evaluation in the Central Coastal Plain of North Carolina,
North Carolina Department of Natural Resources and Community Development, 119 pp.
-I North Carolina Department of Environment and Natural Resources. 2007. Dam Operation,
Maintenance, and Inspection Manual, North Carolina Department of Environment and
Natural Resources, Division of Land Resources, Land Quality Division, 1985 (Revised
2007).
NUS Corporation 1989. Screening Site Inspection Phase I, Carolina Power and Lighting, Sutton
Steam Plant, Wilmington, New Hanover County, North Carolina, EPA I.D.
NCD000830646.
Winner,-M.D., Jr., and Coble, R.W., 1989, Hydrogeologic Framework of the North Carolina
Coastal Plain Aquifer System: U.S. Geological Survey Open -File Report.
10

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DUKE ENERGY PROGRESS
L.V. SUTTON ENERGY COMPLEX
NPDES PERMIT #NC0001422
WILMINGTON, NORTH CAROLINA
DATE
DEC. 16, 2014
FIGURE 1

Table 1 - Laboratory Analytical Methods
Parameter,. -
Method..'
'Reporting' .
Limit
Units :
Laboratory_
Fluoride (F)
EPA 300.0
1
mg/I
Duke Energy
Mercury (Hg)
EPA 245.1
0.05
Ng/l
Duke Energy
Arsenic (As)
EPA 200.8
1
Ng/I
Duke Energy
Cadmium (Cd)
EPA 200.8
1
Ng/I
Duke Energy
Chromium (Cr)
EPA 200.8
1
Ng/I
Duke Energy
Copper (Cu)
EPA 200.8
1
Ng/I
Duke Energy
Lead (Pb)
EPA 200.8
1
Ng/I
Duke Energy
Nickel (Ni)
EPA 200.8
1
Ng/I
Duke Energy
Selenium (Se)
EPA 200.8
1
Ng/I
Duke Energy
Table 2 - Sutton Energy Complex Ash Basin - Example of Surface Water/Seep Monitoring Flow
and Analysis Results Table
Parameter. ,..• ,- • ° .
Units,:::
Seep .'
_ Location; if:
applicable
Cape Fear.
River-.:
Upstt6dm
'.Cape: Fear
Aiver- =
-Downstream'
Fluoride
mg/I
Hg - Mercury (71900)
Pg/I
As - Arsenic (01002)
Ng/l
Cd - Cadmium (01027)
Ng/I
Cr - Chromium (01034)
Ng/I
Cu - Copper (01042)
Ng/I
Pb - Lead (01051)
Ng/I
Ni - Nickel (01067)
Ng/I
Se - Selenium (01147)
Ng/I
pH
S.U.
Temperature
°C
Flow
MGD

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