NC0003417_Cooling Pond Seep Report_20220828

41,
dfais DUKE Jessica L.Bednarcik
Senior Vice President
ENERGY® Environmental,Health&Safety,
Coal Combustion Products
526 S.Church Street
Mail Code:EC3XP
Charlotte,NC 28202
[phone]
—0) 1E © HOWE
February 23, 2022
Via Overnight Mail F E B 2 8 %2
DIVISION OF WATER RESOURCES
Danny Smith, Director DIRECTOR'S OFFICE
North Carolina Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Report Under Special Order by Consent—EMC SOC WQ S 18-006
Duke Energy Progress, LLC—H. F. Lee Steam Electric Plant
NPDES Permit NC0003417
Wayne County
Cooling Pond Seep report
Dear Mr. Smith
On behalf of Duke Energy Progress,LLC (DEP), I am submitting to you the Cooling Pond seep
report as required by Section 2.b.7 of the subject Special Order by Consent(SOC),SOC No. S18-
006. Duke Energy proposes to continue to inspect appropriate seeps as part of its ongoing
cooling pond Dam Safety inspections and to confirm management in a manner that is sufficient
to protect public health, safety, and welfare, the environment, and natural resources through its
ongoing NPDES permit instream monitoring above and below our operations as outlined in
NPDES permit NC0003417.
Duke Energy requests approval of this ongoing management plan for the cooling pond
concurrent with the ash basin seep amendment to the sites Closure plan.
Please direct any questions about this submittal to Shannon Langley at [phone].
I certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.

A
Sincerely,
.77(
Jessica L. Bednarcik
Senior Vice President
Environment, Health & Safety and Coal Combustion Products
Attachment:
HF Lee Steam Electric Plant Cooling pond seep report
cc: Jim Wells, Duke Energy
Ed Sullivan, Duke Energy
Matt Hanchey, Duke Energy
Richard Baker, Duke Energy
Shannon Langley, Duke Energy
Joyce Dishmon, Duke Energy
John Toepfer, Duke Energy
Mike Graham, Duke Energy
Bob Sledge, NCDEQ
1617 Mail Service Center
Raleigh, NC 27699-1617
David May, DEQ
943 Washington Square Mall
Washington, NC 27889

} J
synTerra Science & Engineering Consultants �I
synterracorp.com
COOLING POND SEEP REPORT
H.F. LEE ENERGY COMPLEX
EMC SOC WQ S18-006
1199 BLACK JACK CHURCH ROAD
GOLDSBORO, NC 27530
FEBRUARY 2022
PREPARED FOR
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DUKE ENERGY PROGRESS, LLC
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Kathy Webb Tim Grant
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Kelly ManagerFerr

Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
EXECUTIVE SUMMARY
SynTerra prepared this Cooling Pond Seep Report pertaining to the cooling pond at the H.F. Lee
Energy Complex (H.F. Lee or Site) to describe plans to manage identified seeps in a manner that
protects public health, safety and welfare, the environment, and natural resources. This report
was prepared on behalf of Duke Energy Progress, LLC (Duke Energy). Instream monitoring of
the Neuse River will continue as required by National Pollutant Discharge Elimination System
(NPDES) Permit NC0003417. Periodic inspection of the cooling pond dam and associated seeps
will continue as required by North Carolina Administrative Code, Title 15A, Subchapter 02K,
Dam Safety (02K). Additional seep monitoring and corrective action is not recommended for
cooling pond seeps at H.F. Lee.
Special Order by Consent (SOC) WQ S18-006, approved in January 2019, addresses the
management of seeps during the process of basin closure under the Coal Ash Management Act
of 2014, North Carolina General Statutes 130A-309.200 through 130A-309.231 and the federal
Coal Combustion Residuals (CCR) Rule, 40 CFR Parts 257 and 261. Section 2.b.7 of the SOC
states:
Within 60 days of the submittal of the Seep Characterization Report, Duke Energy
shall submit a complete and adequate proposed amendment to the groundwater
Corrective Action Plan and/or Closure Plan as appropriate for the Facility
describing how any seeps identified in the Seep Characterization Report will be
managed in a manner that will be sufficient to protect public health, safety, and
welfare, the environment, and natural resources...Notwithstanding the foregoing
provisions of this paragraph, any cooling pond seeps contained in the Seep
Characterization Report shall be addressed in a separate report(rather than a
proposed amendment to the groundwater Corrective Action Plan and/or Closure
Plan), specific to the matters of those seeps, and describe how remaining cooling
pond seeps will be managed in a manner that will be sufficient to protect public
health, safety, and welfare, the environment, and natural resources.
The Seep Characterization Report (SynTerra, 2021) identified 21 non-dispositioned cooling pond
seeps that flow, or potentially flow, to the Neuse River. However, the cooling pond at H.F. Lee
has not been identified as a potential source area contributing to groundwater or soil
constituent concentrations.
February 2022 Page ES-1
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Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
Only six of the 21 cooling pond seeps exhibited sufficient flow to be sampled during the
October 2021 seep characterization sampling event. Constituent concentrations were less than
North Carolina Administrative Code, Title 15A, Subchapter 02B, Surface Water and Wetland
Standards (02B) criteria in CPS-09, CPS-18, CPS-20, and CPS-21. Seep characterization analytical
results indicate that total arsenic concentrations were greater than 02B standards in CPS-01
and CPS-02. However, arsenic concentrations in CPS-01 and CPS-02 are within the range of
background values established for Coastal Plain surficial aquifers at Duke Energy sites in the
region. Additionally, the concentrations of CCR indicator constituents (boron and sulfate) in
seeps CPS-01 and CPS-02 are less than groundwater background values established for H.F. Lee
supporting that arsenic concentrations detected in those seeps are likely not indicative of CCR
influence. Furthermore, the quarterly SOC monitoring data collected at instream monitoring
locations Downstream Neuse River and Downstream 2 Neuse River, located downstream of
those seep discharges, indicate that all SOC Attachment B constituents are less than their
respective 02B standards.
Constituent concentration trends were evaluated using Mann-Kendall trend tests (Appendix C).
Due to the low flow nature and intermittent presence of cooling pond seeps resulting in limited
data sets, trend conclusions are limited. Trends identified indicate decreasing concentration
trends or stable conditions.
Non-dispositioned seeps are scheduled to be monitored as required by the SOC until
termination of the SOC by Division of Water Resources (DWR), or no later than February 28,
2023. Upon termination of the SOC, instream monitoring of the Neuse River will continue as
required by NPDES Permit NC0003417. Periodic inspection of the cooling pond dam and
associated seeps will continue as required by 02K. Additional seep monitoring and corrective
action is not recommended for cooling pond seeps at H.F. Lee.
February 2022 Page ES-2
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1
Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
TABLE OF CONTENTS
SECTION PAGE
EXECUTIVE SUMMARY ES-1
1.0 INTRODUCTION 1-1
1.1 Background 1-1
1.2 Purpose and Scope 1-1
1.3 Previous Reporting 1-2
2.0 OVERVIEW OF SEEPS PROPOSED FOR MANAGEMENT 2-1
3.0 PROPOSED SEEP MONITORING PLAN 3-1
3.1 Seeps Associated with the Cooling Pond 3-1
3.2 Seep Constituents and Trends 3-1
3.3 Potential Seep Monitoring 3-2
4.0 REFERENCES 4-1
LIST OF FIGURES
Figure 1-1 Site Location Map
Figure 2-1 Existing Seep Locations and Inspection Areas
LIST OF TABLES
Table 3-1 Seep Characterization Sampling Results—October 2021
LIST OF APPENDICES
Appendix A SOC WQ S18-006
Appendix B NPDES Permit NC0003417
Appendix C Mann-Kendall Trend Test Analysis, February 2022
February 2022 Page i
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Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
LIST OF ACRONYMS
02B North Carolina Administrative Code,Title 15A, Subchapter 02B, Surface
Water and Wetland Standards
02K North Carolina Administrative Code, Title 15A, Subchapter 02K, Dam Safety
CCR coal combustion residual
COI constituent of interest
CSA Comprehensive Site Assessment
DWR Division of Water Resources
Duke Energy Duke Energy Carolinas, LLC
LOLA Lay of the Land Area
NCDEQ North Carolina Department of Environmental Quality
NPDES National Pollutant Discharge Elimination System
Site/H.F. Lee H.F. Lee Energy Complex
SOC Special Order by Consent
February 2022 Page ii
Project:00.0061.20

L �
Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
1.0 INTRODUCTION
SynTerra prepared this Cooling Pond Seep Report pertaining to the cooling pond at the H.F. Lee
Energy Complex (H.F. Lee or Site) to describe plans to manage identified seeps in a manner that
protects public health, safety and welfare, the environment, and natural resources.This report
was prepared on behalf of Duke Energy Progress, LLC (Duke Energy). Instream monitoring of
the Neuse River will continue as required by National Pollutant Discharge Elimination System
(NPDES) Permit NC0003417. Periodic inspection of the cooling pond dam and associated seeps
will continue as required by North Carolina Administrative Code, Title 15A, Subchapter 02K,
Dam Safety(02K). Additional seep monitoring and corrective action is not recommended for
cooling pond seeps at H.F. Lee.
1.1 Background
Special Order by Consent (SOC) WQ 518-006, approved in January 2019, addresses
management of seeps at the Site during the process of basin closure under the Coal Ash
Management Act of 2014, North Carolina General Statutes 130A-309.200 through 130A-
309.231, and the federal Coal Combustion Residuals (CCR) Rule, 40 CFR Parts 257 and 261. The
SOC is provided in Appendix A.
SOC WQ S18-006 is primarily focused on seeps associated with the ash basins and lay of the
land area (LOLA) at H.F. Lee. However, seeps associated with the cooling pond were included in
the SOC. Section 1.d of SOC WQ S18-006 states:
"The H.F. Lee Facility also has a permitted wastewater cooling pond that was used
during coal-fired operations, and continues to be used for the combined cycle plant.
Several areas of minor seep flow from the cooling pond to the Neuse River have been
observed. Chemical testing of the cooling pond seeps has revealed some contain minor
concentrations of CCR. The cooling pond seeps listed in Attachment A are also addressed
by this Special Order."
The cooling pond at H.F. Lee has not been identified as a potential source area for CCR
constituent concentrations in soil or groundwater.
A site location map is provided as Figure 1-1.
1.2 Purpose and Scope
As required in Section 2.b.7 of the SOC, SynTerra is providing this Cooling Pond Seep Report to
describe plans to manage seeps associated with the cooling pond and identified in the Seep
Characterization Report(SynTerra, 2021) in a manner that will protect public health, safety, and
welfare, the environment, and natural resources.The Seep Characterization Report evaluated
seeps based on the physical status, chemical composition, and jurisdictional determination. This
Cooling Pond Seep Report addresses remaining, non-dispositioned seeps associated with the
cooling pond.
February 2022 Page 1-1
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CoolingSeep Report
Re ort
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
1.3 Previous Reporting
Detailed descriptions of previous Site SOC assessments and characterizations are documented
in the following:
• 2019 Annual Seep Report, H.F. Lee Energy Complex—SynTerra, April 2020
• 2020 Annual Seep Report, H.F. Lee Energy Complex—SynTerra, April 2021
• Comprehensive Site Assessment Update, H.F. Lee Energy Complex—SynTerra, December
2020
• Final Seep Report, H.F. Lee Energy Complex—SynTerra, October 2021
• Seep Characterization Report, H.F. Lee Energy Complex—SynTerra, December 2021
February 2022 Page 1-2
Project:00.0061.20
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Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
2.0 OVERVIEW OF SEEPS PROPOSED FOR MANAGEMENT
According to the SOC, there are 21 identified non-constructed seeps associated with the cooling
pond. None of the 21 cooling pond seeps have been dispositioned since the issuance of the
SOC. Because the cooling pond has not been identified as a potential source area of
constituents and is not undergoing hydrologic changes similar to the decanting, dewatering,
and excavation of the ash basins, the path for dispositioning of seeps described in the SOC
might not apply to the cooling pond seeps. All identified seeps associated with the cooling pond
flow, or potentially flow, to the Neuse River. Seeps associated with the cooling pond are
generally low in flow volume, intermittent in presence, and some are observed to originate
below the ordinary high water mark. Cooling pond seep locations are shown on Figure 2-1.
Six cooling pond seeps exhibited sufficient flow to be sampled during the October 2021 seep
characterization sampling event.
• CPS-01 and CPS-02 are located north of the cooling pond and flow toward the Neuse
River. Seepcharacterization analytical results indicate that total arsenic concentrations
y e c co centrations
are slightly greater than 02B standards but within the background range for Coastal
Plain surficial aquifers, as described in the Comprehensive Site Assessment (CSA) Update
(SynTerra, 2020), for Duke Energy sites located in the Coastal Plan physiographic region.
Additionally, the concentrations of CCR indicator constituents (boron and sulfate) in
seeps CPS-01 and CPS-02 are less than groundwater background values established for
H.F. Lee supporting that arsenic concentrations detected in those seeps are likely not
indicative of CCR influence. The quarterly SOC monitoring data collected at instream
monitoring locations Downstream Neuse River and Downstream 2 Neuse River located
downstream of those seep discharges indicate that all SOC Attachment B constituents
are less than their respective 02B standards. Seep flow at CPS-01 during the seep
characterization sampling event was estimated to be 3 to 5 gallons per minute. Seep
flow at CPS-02 during the seep characterization sampling event was estimated to be 1 to
2 gallons per minute.
• CPS-09, CPS-18, CPS-20, and CPS-21 are located south of the cooling pond and flow
toward the Neuse River. Seep characterization analytical results indicate that no SOC
Attachment B constituent values were greater than 02B standards.
The other 15 cooling pond seeps exhibited insufficient flow to be sampled during the October
2021 seep characterization sampling event.
Seeps CPS-13 and CPS-17 were observed to be dry during both the August 2021 Final Seep
Report inspection and the October 2021 seep characterization sampling event.
February 2022 Page 2-1
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Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
Quarterly SOC monitoring data collected at instream monitoring locations Downstream Neuse
River and Downstream 2 Neuse River have consistently shown all SOC Attachment B
constituents to be less than their respective 02B standards.
February 2022 Page 2-2
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Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
3.0 PROPOSED SEEP MONITORING PLAN
3.1 Seeps Associated with the Cooling Pond
The 21 seeps identified in the SOC associated with the cooling pond remain non-dispositioned
and are monitored as required by the SOC. Upon termination of the SOC, cooling pond seeps
would be adequately addressed by sampling and inspection requirements set forth in NPDES
Permit NC0003417 and 02K dam safety obligations. NPDES Permit NC0003417 is included as
Appendix B. Cooling pond seep constituents and future monitoring details are discussed in the
following sections.
3.2 Seep Constituents and Trends
The cooling pond at H.F. Lee has not been identified as a potential source area contributing CCR
constituents to soil or groundwater. However, as described in the SOC, "several areas of minor
seep flow from the cooling pond to the Neuse River have been observed" and "chemical testing
of the cooling pond seeps has revealed some contain minor concentrations of CCR."
SOC Attachment B constituents were evaluated for those seeps able to be sampled during the
seep characterization sampling event. Six of the 21 cooling pond seeps exhibited sufficient flow
to be sampled. Analytical results from seeps CPS-09, CPS-18, CPS-20, and CPS-21 indicate that
no Attachment B constituent concentrations were greater than 02B standards. Results from the
seep characterization sampling event are presented in Table 3-1.
Seep characterization analytical results from seeps CPS-01 and CPS-02 indicate that only total
arsenic concentrations were slightly greater than 02B standards. However, the arsenic
concentrations in CPS-01 and CPS-02 are within the background value range for Coastal Plain
surficial aquifers at Duke Energy sites in the Coastal Plain physiographic region (SynTerra, 2020).
Additionally, the concentrations of CCR indicator constituents (boron and sulfate) in seeps CPS-
01 and CPS-02 are less than groundwater background values established for H.F. Lee supporting
that arsenic concentrations detected in those seeps are likely not indicative of CCR influence.
Quarterly monitoring data collected during the October 2021 sampling event at instream
monitoring locations Downstream Neuse River and Downstream 2 Neuse River, located
downstream of those seep discharges, indicate that all Attachment B constituents are less than
their respective 02B standards.
February 2022 Page 3-1
Project.00.0061 20

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Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
The Mann-Kendall trend test was performed, where possible, on data pertaining to Attachment
B constituents, to analyze how constituent concentrations in cooling pond seeps have changed
over time.The Mann-Kendall trend test evaluates data over time to develop a statistical
conclusion that pertains to trends — increasing, decreasing, or stable — of a constituent
concentration. At least four detected constituent concentrations are required to reach a
statistical conclusion.
Due to the low flow nature and intermittent presence of the cooling pond seeps, only four
seeps (CPS-09, CPS-15, CPS-18, and CPS-21) have been sampled enough to potentially reach
trend conclusions.
• A statistical conclusion was reached for 78 constituent-location pairs.
• 20 statistical conclusions are associated with water quality parameters.
• Of the 58 statistical conclusions pertaining to chemical constituents, 41 percent of
constituent concentrations are stable or have statistically significant decreasing trends.
• Of the 58 statistical conclusions pertaining to chemical constituents, 59 percent of
trends could not be analyzed due to greater than 50 percent non-detects.
• Out of 58 statistical conclusions pertaining to chemical constituents, no statistically
significant increasing trends were identified.
3.3 Potential Seep Monitoring
Non-dispositioned seeps are scheduled to be monitored as required by the SOC until
termination of the SOC by DWR, or no later than February 28, 2023. Upon termination of the
SOC, instream monitoring of the Neuse River will continue as required by NPDES Permit
NC0003417. Periodic inspection of the cooling pond dam and associated seeps will continue as
required by 02K. Additional seep monitoring and corrective action is not recommended for
cooling pond seeps at H.F. Lee.
February 2022 Page 3-2
Project:00.0061.20

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Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
4.0 REFERENCES
SynTerra (2020). Comprehensive Site Assessment Update-H.F. Lee Energy Complex, December
2020.
SynTerra (2021). Seep Characterization Report-H.F. lee Energy Complex, December 2021.
February 2022 Page 4-1
Project:00.0061.20

•
Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
FIGURES
41,41e
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synTerra
Science& Engineering Consultants

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NOTES: i
1.ALL BOUNDARIES ARE APPROXIMATE.
2.USGS TOPOGRAPHIC MAP PROVIDED BY ESRI BASEMAP 1.
SERVICE,LAST UPDATED AUGUST 2021. 11
-,'PROPERTY BOUNDARY
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DUKE , COOLING POND SEEP REPORT
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Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
TABLES
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synTerra
Science & Engineering Consultants

•
TABLE 3-1
SEEP CHARACTERIZATION SAMPLING RESULTS-OCTOBER 2021
COOLING POND SEEP REPORT
H.F.LEE ENERGY COMPLEX
DUKE ENERGY PROGRESS,LLC,GOLDSBORO,NC
Field Parameters Total Concentration
•alplaal Parameter pHTemperature C p0<.Ific ...FF.I9M Rdction E. Turbidity' Flow Arsenic Sark. Boron Bro
mide Cadmium Calcium Chloride Chromium r pp Fluoride Hardness
.ayaas<e en Potential
S.0 0
Reporting Units . C mes y h /cm mg, mV nOV STD' OPN yg/1 p9/I yen yg/1 veil me/1 mg/L yen 99/I into. mom.
15A 5220026(Class C,WS.1V) 6.0.1.0 32NC 4 ME NE SO NE 10 1000 7100n NE NC NE 250 NE HE 1.0 100
Sample ample
Locetlon ID Natlla Latitude Longitude Collection Analytical Results
Date
MuseDownNvaerm- Water 35.11069 -21.06500 10/15/2021 7.5 19 100 6.45 166 371 23 NM <1 34 <50 <100 <0.1 847 19 1 -. 0.12 32.9
Dowmtrmm 2
Negse R Wester 35.36729 70.00298 10/11/2021 7.6 19 183 3.13 135 340 22 NM <1 32 <50 <100 <0.1 0.38 19 <I <2 0.12 32.7
CP601 Water 35.37924 -31.07377 10/18/2021 7.1 22 292 -114 91 16 3.5 42 64 350 <0.1 10.4 21 <I <2 0.37 42.5
075-02 Water 35.37901 -70.07291 10/111/2021 7.0 23 267 -102 103 7.9 1.5 41 63 340 <0.1 9.37 23 <1 <2 0.36 39.6
CPS.09 Water 35.36922 -31.07800 10/19/2021 6.0 12 320 4.25 .31 121 42 5 0.1 52 60 320 <0.1 6.26 28 <1 <2 0.49 49.1
CP5-11 Water 35.37195 .78.06605 10/19/2021 3.0 13 233 5.05 125 330 link 2.6 1.3 35 52 340 <0.1 8.62 26 <1 <2 0.31 32.4
CP5.20 Water 35.37202 -31.06630 10/19/2021 3.0 19 232 4.46 20 185 39 3 2.23 43 51 340 <0.1 8.36 23 1.09 <2 0.35 33.1
CPS-21 Water 35.36903 31.07580 10/19/2021 7.0 13 203 e.20 -12 118 29 3.5 <I 23 54 320 <0.1 8.35 31 <I <2 0.59 46.2
Created by:3PC/K6F Checked by 856
BOLL
sONwNed oxygen one turbidity are not required parameters per SOC Attachment 6.
'Mercury standard of 0.012 pg/1 represents a chronic value.
standard of 10 mg/L represents a nitrate as nitrogen value.
'Selenium
tandard of S W/L represents a chronic value.
'DNolved arse.standard of l50 yp/L represents a chronic value.
'DNsolve4 chromium standard of 11 pg/L represents a chronic value zpeci0c to absolved chromium MI.Dissolved chromium(III)standards are hardness trependent.Dissolved chromium roncentrahons from the October 2021 sampling event represent total dissolved chromium concentrations.
•Bold highlighted cells indicate concentrations greater than applicable conservative 15 UGC 025(Class C,WS.1V)standards.
▪ Not a seep,Instream monitoring location per SOC.
n•In-stream target value established per language In ISA XGC 025.0202 and.0201.
▪-Concentration not detected at or greater than the adjusted reporting IWIL
A NGC 028(Class C,WS-IV)-ISA HGC Subchapter 025 Section.0200 Standard for Class C,WS•W Surface Waters
Deg C .wees Celsius
n reduction potential
M•gallos perminute
HD•hardnesztdependent dissolved metal standard
pmhos/Cm-..mhos per centimeter
Y9/t-rnIcroorarns
per liter
g me/I.•nil rams per liter
me-H/L•rryworarm nitrogen Per Inter
mV millivolts
• available na NGC•N Administrative Code
n
NE- o established
NMnot cured
NT.-NephelomeMc Turbidity Units
RI-Relative Percent Difference(RPD)value was outside control Omits.
SOC-Special Order by Consent
epelofz

TABLE 3-1
SEEP CHARACTERIZATION SAMPLING RESULTS-OCTOBER 2021
COOLING POND SEEP REPORT
H.F.LEE ENERGY COMPLEX
DUKE ENERGY PROGRESS,LLC,GOLDSBORO,NC
Total Concemeuon(Continued) Dissolved concentration
Total Total Arsenic' Cadmium Chromium Copper Lead Nickel Zinc
Analytical Parameter lead Magnesium mercury' Nickel 0 Selenium Suspended
Sulfate TNalllum Dissolved oentl Zinc
XIINte reau Solids Solids (0.1541 (0.45 V7 (0.454) (0.45Y) (0.45V) (0.45p) (0.4S.
Rep R.Iting On. Vg/L mg/L pq/L p9/L g-N/L m9/L Vg mg/L p9/L mg/L mg/L pq/L V9/L 4g/L 20/L pq/L pq/L <OIL pg/L
15A NCAC O.(Class C,WS-1V) NE NE 0.012 25 10 NE s 250 2 S00 NE NE ISO HD li/ND HD ND no HD
Sample
Location ID Media Latitude Longitude Collection Analytical Results
Date
OownYream Pesos.wear Water 35.35069 -73.06500 10/15/2021 0.70 2.05 0.0031 1.25 0.46 NA <t 14 <0.2 116 NA 5.)4 <1 <0.1 <I <2 <0.2 <5
Downstream 2 35.36729 -7..00290 10/16/2021 0.709 2.05 0.00294 1.35 0.49 NA <1 14 <0.2 117 NA <5 <1 <0.1 <1 <2 0.691 <5
ass River' Water
CPS-0l Water 35.37924 -70.07377 10/10/2021 <0.2 4.04 0.00117 <1 0.06 <5 <I <0.1 <0.2 143 10 <5 11.3 <0.1 <1 <2 <0.2 <1 <5
CPS-02 Water 35.37901 -)5.0)295 10/15/2021 <0.2 3.92 0.00134 <1 0.06 <5 <I <0.1 <0.2 145 33 <5 11.4 <0.1 <1 <2 <0.2 <1 <5
CPS I, Water 35.36922 -)5.0)500 10/19/2021 <0.2 6.9 0.00302 <1 0.00 <5 <1 <0.1 <0.2 150 46 <5 2.)4 <0.1 <1 <2 <0.2 <1 <5
CPS-18 Water 35.3)195 -211.06605 10/19/2021 <0.2 3.56 <0.0005 <I 0.14 <5 <I 10 <0.2 141 19 R1 <5 <1 <0.1 <1 <2 <0.2 <I <5
C115-20 Water 35.37202 -75.06630 10/19/2021 1.02 4.12 0.01 <1 0.09 <5 <1 4.4 <0.2 135 50 <5 1.02 <0.1 <1 <2 <0.2 <1 <5
CPS-21 Water 35.36903 -70.07500 10/19/2021 <0.2 6.01 <0.0005 <I 0.09 <5 <I <0.1 <0.2 151 7.6 <5 <1 <0.1 11 <2 <0.2 <I <5
Created by:)PC/NNF Checked by:BID
'13..lved oxygen and turbidity are not renwred parameters per soc Attachment B.
standard of 0.0 mg/1 represents a chronic value.
.ninde.ndard of 10 rim.mixes..a nitrate as nitrogen value-
s chronk
value.'Otsso f 150 pd.represents value.a cnronk
standard of II mg.represents a chronic value sped5c to dissolved chromium(VI).Dissolved cAromium(iiq el M standards are hardness-dependent.Dissolved chromium concentrations from e October 2021 sampling event represent total dissolved chromium concentrations.
D1-sold highliighted cells indicate concentrations greater Man applicable conservative 15 NCAC 02B(Class C,WI-N)standards.a
▪ seep, monitoringcation per SOC.
..stream target value established per language In 15A NCAC 02B 0202 and.0200.
.ncentra0on not detected at or greater than Me adjusted reporting NmR.
ISA NCAC 02B Klass C,WS-IV) ISA NCAC Subtlwger 0213 5ec0on.0200 Standard tar Class C,WS•N Surface Waters
Deg C•degree Celsis
E.-oxidation reduction potential
M-galbns per minute
ND•hardness•dependent dissolved metal star..
pmhos/cm•micromhos per centimeter
Yg/L-micrograms per liter
mo/L•milligrams per liter
100-11.-milligrams nitrogen per liter
N A-not available or notanalyzed
NCAC•North Carolina Administrative Co.
NM-not measured l
NTUs-Xephelometdc Turbidity Units
RI•Relative Percent Difference(.13)value was outside control 0m0z.
C-Special Order by Consent
S.D.•standard units
Page 2 of
1

Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
APPENDIX A
SOC WQ S18-006
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Science& Engineering Consultants

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ROY COOPER
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Governor MICHAEL S.REGAN .��k\N ___yo
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Secretary
LINDA CULPEPPER NORTH CAROLINA
Director Environmental Quality
January 11,2019
Mr. Paul Draovitch, Senior Vice President EHS
Duke Energy
526 S. Church Street
Mail Code EC3XP
Charlotte,NC 28202
Subject: SPECIAL ORDER BY CONSENT
SOC No. S18-006
Duke Energy Progress, LLC
H. F. Lee Plant
NPDES Permit NC0003417
Wayne County
Dear Mr. Draovitch:
Attached for your records is a copy of the Special Order by Consent(SOC) approved by the
Environmental Management Commission and signed by the Chairman of the Commission on
January 10, 2019.
The terms and conditions of the SOC are in full effect,including those requiring submittal of
written notice of compliance or non-compliance with any schedule date. The following items are
brought to your attention as they pertain to the terms and conditions of the SOC:
• Payment of the upfront penalty is due no later than February 15, 2019.
• Monitoring performed per the terms of the SOC shall commence during the current calendar
quarter(January-March),with results submitted to DWR no later than April 30, 2019.
Subsequent monitoring and reporting shall occur as specified in the SOC.
Pursuant to North Carolina General Statute 143-215.3D, water quality fees have been revised to
include an annual fee for activities covered under a Special Order by Consent. Duke Energy will
be subject to a fee of$500.00 on a yearly basis while under the Order. The initial fee payment
will be invoiced at a later date, with future fee invoicing done on an annual basis.
S North
512North Carolina
Salisbury DepartmentStreet1 o1617£EnMavironmentallIService QualityCenter I Raleigh I Division
North of WaterCarolina Resources
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Mr. Paul Draovitch
S 18-006 Transmittal
p. 2
If you have any questions concerning this matter, please contact Bob Sledge at(919) 807-6398.
Sincerely,
k
Linda Culpepper
Attachment
cc: Central Files
NPDES Unit—SOC File
ec: Washington Regional Office—DWR/Water Quality Regional Operations
Shannon Langley—Duke Energy
Sara Janovitz—EPA Region 4
Jeff Poupart—DWR/WQPS

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
COUNTY OF WAYNE
IN THE MATTER OF )
NORTH CAROLINA ) SPECIAL ORDER BY CONSENT
NPDES PERMIT NC0003417 )
) EMC SOC WQ S18-006
HELD BY )
DUKE ENERGY PROGRESS, LLC )
Pursuant to the provisions of North Carolina General Statutes(G.S.) 143-215.2, this Special
Order by Consent is entered into by Duke Energy Progress, LLC,hereinafter referred to as Duke
Energy, and the North Carolina Environmental Management Commission, an agency of the State
of North Carolina created by G.S. 143B-282, and hereinafter referred to as the Commission.
Duke Energy and the Commission are referred to hereafter collectively as the"Parties."
1. Stipulations: Duke Energy and the Commission hereby stipulate the following:
a. This Special Order by Consent("Special Order") addresses issues related to the
elimination of seeps (as defined in subparagraphs f and g below) from Duke
Energy's coal ash basins during the separate and independent process of basin
closure under the Coal Ash Management Act, G.S. 130A-309.200 through 130A-
309.231 ("CAMA") and the Federal Coal Combustion Residuals Rule, 40 CFR
Parts 257 and 261. The Environmental Protection Agency first directed
permitting authorities to consider potential impacts on surface water of seeps from
earthen impoundments in 2010. At that time, Duke Energy began discussions
with the North Carolina Department of Environmental Quality("the
Department")regarding seeps at multiple Duke Energy facilities, including
identifying certain seeps in permit applications and providing data to the
Department regarding seeps. In 2014, Duke Energy provided a comprehensive
evaluation of all areas of wetness and formally applied for NPDES permit
coverage of all seeps. Since 2014, Duke Energy has performed periodic
inspections and promptly notified the Department of new seeps and sought
NPDES permit coverage where appropriate. On March 4, 2016,the Department
issued Notices of Violation("NOVs")to Duke Energy related to seeps.

EMC SOC WQ S18-006
Duke Energy Progress,LLC
p. 2
Both decanting and dewatering of the H. F. Lee Facility's coal ash basins will be
required before the ash basins can be closed. Decanting(i.e.,removal of the free
water on the surface of the coal ash basin), has already been observed to affect
existing seeps at Duke Energy's H. F. Lee Facility. Removal of remaining coal
ash wastewater through continued decanting and dewatering(i.e. removal of
sufficient interstitial water)is expected to substantially reduce or eliminate the
seeps. In order to accomplish this goal of substantially reducing or eliminating
seeps,this Special Order affords certain relief to Duke Energy related to the non-
constructed seeps (as defined in subparagraph g below),while Duke Energy
completes activities associated with closure of the ash basins at the H. F.Lee
Facility. After completion of those activities, for any remaining seeps,Duke
Energy must take appropriate corrective action as specified more fully below.
b. Duke Energy has been issued a North Carolina NPDES permit for operation of an
existing wastewater treatment works at the following electric generation facility
(the"H. F. Lee Facility"):
Permit Issuance Receiving Water
Facility Number I County Date for Primary
Outfall
H. F.Lee NC0003417 Wayne 07/23/2010 Neuse River
c. The H. F. Lee Facility listed above has ceased coal fired generation and now
consists of a 3 x 1 combined cycle unit capable of being fired on natural gas or
oil,and five simple cycle combustion turbines. The facility's coal ash basins still
exist, and are subject to the provisions of this Special Order.
d. The H.F. Lee Facility also has a permitted wastewater cooling pond that was used
during coal-fired operations,and continues to be used for the combined cycle
plant. Several areas of minor seep flow from the cooling pond to the Neuse River
have been observed. Chemical testing of the cooling pond seeps has revealed
some contain minor concentrations of coal combustion residuals (CCR). The
cooling pond seeps listed in Attachment A are also addressed by this Special
Order.
e. Wastewater treated at coal-fired electric stations includes water mixed with ash
produced through the combustion of coal for the steam generation process. Ash is
controlled and collected through the use of water, creating a slurry that is
conveyed to impoundments or basins with earthen dike walls. In the ash basin,
the solids separate from the liquid portion,with the resulting supernatant
discharged under the terms of the NPDES permit.

EMC SOC WQ S 18-006
Duke Energy Progress,LLC
P. 3
f. The coal ash basins and the cooling pond at the H. F. Lee Facility are unlined,
having no impermeable barrier installed along their floors or sides. Earthen
basins and dike walls are prone to the movement of liquid through porous features
within those structures through a process known as seepage. The H. F. Lee
Facility exhibits locations adjacent to,but beyond the confines of,the coal ash
basins and the cooling pond where seepage of wastewater from those basins may
intermix with groundwater, reach the land surface (or"daylight"), and may flow
from that area. Once such seepage reaches the land surface, it is referred to as a
"seep." Each of the seeps identified at the H. F. Lee Facility and addressed in this
Special Order exhibit some indication of the presence of coal ash wastewater.
Both(a)confirmed seeps and(b)areas identified as potential seeps that were later
dispositioned,are identified in Attachment A.
g. Seeps that are not on or within the dam structure or that do not convey wastewater
via a pipe or constructed channel directly to a receiving stream are referred to as
"non-constructed seeps." Non-constructed seeps at the H.F. Lee Facility often
exhibit low flow volume and may be both transient and seasonal in nature,and
may, for example,manifest as an area of wetness that does not flow to surface
waters, a point of origin of a stream feature, or flow to an existing stream feature.
These circumstances of the non-constructed seeps make them difficult to discern,
characterize,quantify and/or monitor as discrete point source discharges. This
creates challenges in permit development and compliance monitoring because it is
difficult to accurately monitor for flow and discharge characterization. Non-
constructed seeps at the H. F. Lee Facility present significant challenges to their
inclusion in NPDES permits as point source discharges,but they do cause or
contribute to pollution of classified waters of the State. Therefore,these non-
constructed seeps are addressed in this Special Order rather than in an NPDES
permit.
h. Investigations and observations conducted by the Department and U. S.Army
Corps of Engineers staff have concluded that some seeps emanating from Duke
Energy's coal ash ponds create and/or flow into features delineated as classified
waters of the State or Waters of the United States.
Collectively,the volume of non-constructed seeps is generally low compared to
the volume of peituitted wastewater discharges at the Duke Energy Facilities.

EMC SOC WQ S 18-006
Duke Energy Progress,LLC
p. 4
j. In 2014,Duke Energy conducted a survey of each coal-fired electric generation
station to identify potential seeps from the coal ash surface impoundments. Duke
Energy included all areas of wetness identified around the impoundments as
seeps, and submitted applications to include those seeps in NPDES permits.
Beginning in 2015,Duke Energy has implemented semi-annual surveys to
identify new seeps in the vicinities of the coal ash basins. Additional seeps have
been observed and documented during these surveys and reported to the
Department pursuant to a Discharge Identification Plan mandated by CAMA.
Additional investigation has determined that not all of areas identified in 2014 are
seeps,but each Duke Energyfacilitydoes have multiple seeps.
P
k. The Department issued NOVs to Duke Energy on March 4,2016 for the seeps
that emanate from the unlined coal ash surface impoundments at the Duke Energy
Facilities.
1. Non-constructed seeps create conditions such that certain surface water quality
standards may not consistently be met at all Duke Energy monitoring sites.
m. The presence of coal ash influenced water in the non-constructed seeps causes or
contributes to pollution of the waters of this State, and Duke Energy is within the
jurisdiction of the Commission as set forth in G.S. Chapter 143,Article 21.
n. A list of seeps identified in the vicinities of the coal ash surface impoundments at
the H.F. Lee Facility, as well as their locations, and the bodies of water those
seeps may flow into(if applicable),can be found in Attachment A to this Special
Order.
o. Duke Energy must close the coal ash surface impoundments at all North Carolina
coal-fired electric generating stations in accordance with applicable requirements
set out in CAMA and the Federal Coal Combustion Residuals Rule,requirements
of which are independent of the resolution of seeps addressed in this Special
Order.
p. Decanting of wastewater performed at Duke Energy's coal ash basins is expected
to eliminate or substantially reduce the seeps from the ash basins at the Duke
Energy Facilities.
q. Since this Special Order is by consent,the Parties acknowledge that review of the
same is not available to the Parties in the N.C.Office of Administrative Hearings.
Furthermore,neither party shall file a petition for judicial review concerning the
terms of this Special Order.

EMC SOC WQ S18-006
Duke Energy Progress,LLC
p. 5
2. Duke Energy, desiring to resolve the matters causing or contributing to pollution of the
waters of the State described above,hereby agrees to do the following:
a. Penalties
1) Upfront Penalty. As settlement of all alleged violations due to seepage at
these Duke Energy Facilities,pay the Department, by check payable to the
North Carolina Department of Environmental Quality, a penalty in the
amount of$72,000, calculated based upon$6,000 each for twelve non-
constructed seeps identified prior to January 1, 2015.
A certified check in the amount of$72,000.00 must be made payable to
the Department of Environmental Quality and sent to the Director of the
Division of Water Resources(DWR) at 1617 Mail Service Center,
Raleigh,North Carolina 27699-1617 by no later than thirty(30)days
following the date on which this Special Order is approved and executed
by the Commission,and received by Duke Energy.
No penalty shall be assessed for seeps identified after December 31, 2014,
given Duke Energy's inclusion of seeps in permit applications and
compliance with the Discharge Identification Plan required under CAMA.
By entering into this Special Order,Duke Energy makes no admission of
liability,violation or wrongdoing. Except as otherwise provided herein,'
payment of the upfront penalty does not absolve Duke Energy of its
responsibility for the occurrence or impacts of any unauthorized
discharges in the area of the Duke Energy Facilities that may be
discovered in the future,nor does the payment preclude DWR from taking
enforcement action for additional violations of the State's environmental
laws.
' See especially paragraph 2(a)(2) excepting newly identified seeps from future penalties under
certain conditions.

,
EMC SOC WQ S18-006
Duke Energy Progress,LLC
p.6
2) Stipulated Penalties. Duke Energy agrees that unless excused under
paragraph 5, Duke Energy will pay the Department,by check payable to
the North Carolina Department of Environmental Quality, stipulated
penalties according to the following schedule for failure to perform
activities described in paragraphs 2(b and c),or for failure to comply with
interim action levels listed in Attachment A.
Failure to meet a deadline in the Compliance $1,000.00/day for the first seven
Schedule in 2(b)of this Special Order days; $2,000.00/day thereafter
Failure to meet any other deadline in this $1,000.00/day for the first seven
Special Order days; $2,000.00/day thereafter
Exceedance of an interim action level listed in
Attachment A $4,500.00 per monitored exceedance
Monitoring frequency violations $1,000.00 per violation
Failure to submit,by the deadline set forth
herein,adequate amendments to groundwater
Corrective Action Plans or Closure Plans to $5,000.00 per day,to a maximum of
address all remaining seeps, through $1,000,000.00.
corrective action as applicable under
paragraph 2(b)(7) of this Special Order.2
As long as Duke Energy remains in compliance with the terms of this Special Order, as
well as CAMA and conditions of any approvals issued thereunder,the Department shall
not assess civil penalties for newly identified seeps.
b. Compliance Schedule. Duke Energy shall undertake the following activities in
accordance with the indicated time schedule. No later than fourteen(14)calendar
days after any date identified for accomplishment of any activity, Duke Energy
shall submit to the Director of DWR written notice of compliance or
noncompliance therewith. In the case of compliance, the notice shall include the
date compliance was achieved along with supporting documentation if applicable.
In the case of noncompliance,the notice shall include a statement of the reason(s)
for noncompliance,remedial action(s)taken, and a statement identifying the
extent to which subsequent dates or times for accomplishment of listed activities
may be affected.
2 Failure to adequately implement any amended Corrective Action Plan or Closure Plan will be
handled in the normal course.

EMC SOC WQ S18-006
Duke Energy Progress,LLC
p. 7
Duke Energy is required to comply with the requirements of G.S. § 130A-
309.216. Duke Energy has announced plans to construct an ash beneficiation
plant at the H. F. Lee Facility capable of processing 300,000 tons of CCR material
per year.
1) The Coal Ash Management Act(G.S. § 130A-309.210)required the
cessation of CCR wastewater placement into the basins at the H. F.Lee
Facility by October 1,2014. Duke Energy commenced decanting in April
2016. Decanting will be completed by March 31,2019.
2) Dewatering will be required in order to excavate the ash for the purpose of
beneficiation. Duke Energy will begin the process of removal of
interstitial water from the H. F.Lee Facility no later than July 31, 2019
and will continue as needed to support the beneficiation plant described
above.
3) Once the dewatering process is initiated,within(30) days after the end of
each quarter,Duke Energy shall provide reports on the status of
dewatering work and other activities undertaken with respect to
excavation of each coal ash surface impoundment to DWR. The quarterly
reports are due by April 30,July 30,October 30, and January 30. The
reports are to be submitted as follows: one copy must be mailed to DWR's
Washington Regional Office Supervisor,943 Washington Square Mall,
Washington,NC 27889,and one copy must be mailed to the Water
Quality Permitting Program, Division of Water Resources, 1617 Mail
Service Center, Raleigh NC 27699-1617. The quarterly reporting
requirement shall remain in force until completion of two years of
beneficiation operations.

EMC SOC WQ S18-006
Duke Energy Progress,LLC
P. 8
4) Duke Energy shall conduct annual comprehensive surveys of areas down
gradient of the ash basins,the Lay of Land Area(LOLA) and the cooling
pond, identifying new seeps, and documenting the physical characteristics
of previously documented seeps. All examinations of seeps must include
identification of seeps by approximate latitude and longitude and date-
stamped digital photographs of their appearance. A report summarizing
the findings of the surveys, including a section analyzing the effect
decanting of the basin(s)has on seep flows, accompanied by copies of the
photographs noted above ("Annual Seep Report"),shall be submitted to
DWR in conjunction with submittal of the April 30 quarterly report noted
in 2(b)(3) above. This Annual Seep Report must list any seep that has
been dispositioned(as described below) during the previous year,
including an analysis of the manner of disposition. For purposes of this
Special Order,"dispositioned" includes the following: (I)the seep is dry
for at least three consecutive quarters; (2)the seep does not constitute, and
does not flow to,waters of the State or Waters of the United States for
three consecutive quarters; (3)the seep is no longer impacted by flow
from any coal ash basin as determined by the Director of DWR in accord
with applicable law and best professional judgment; or(4) the seep has
been otherwise eliminated(e.g.,through an engineering solution). If a
seep that has been dispositioned through drying up reappears in any
subsequent survey, such a seep will no longer be deemed dispositioned
and can be subsequently re-dispositioned as specified above.
5) No later than October 31, 2021 Duke Energy shall conduct a
comprehensive survey of areas down gradient of ash basins at the H. F.
Lee Facility, identifying new seeps, and documenting the physical
characteristics of previously documented seeps. All examinations of seeps
must include identification of seeps by approximate latitude and longitude
and date-stamped digital photographs of their appearance. A report
summarizing the findings of this survey, including a section analyzing the
effect decanting of the basin(s)has had on seep flows, accompanicd by
copies of the photographs noted above, shall be submitted to the Director
of DWR("Final Seep Report"). This Final Seep Report must list any seep
that has been dispositioned(as described in subparagraph(4)above)
during decanting process,including an analysis of the manner of
disposition. The determination of whether a seep is dispositioned rests
with the Director of DWR. At, or at any time prior to, submission of the
Final Seep Report,Duke Energy shall seek formal certification from the
Director of DWR, certifying the disposition of any seep that Duke Energy
has characterized as dispositioned. Any seeps not certified as
dispositioned by the Director of DWR shall not be deemed as
dispositioned.

EMC SOC WO S18-006
Duke Energy Progress,LLC
p.9
6) If any seeps have not been certified by the Director of DWR as
dispositioned(as described in subparagraph 4)above), Duke Energy shall
conduct a characterization of those seeps.3 Duke Energy shall submit a
report on the findings of these characterizations ("Seep Characterization
Report")to the Director of DWR no later than December 31,2021 (i.e.,
within 60 days of the submittal of the Final Seep Report). The Seep
Characterization Report must include all sampling data for each remaining
seep as well as Duke Energy's evaluation of the jurisdictional status of all
seeps at the H. F. Lee Facility. The determination regarding whether a
surface water feature is a classified water of the State rests with DWR.
7) Within 60 days of the submittal of the Seep Characterization Report, Duke
Energy shall submit a complete and adequate proposed amendment to the
groundwater Corrective Action Plan and/or Closure Plan as appropriate
for the Facility describing how any seeps identified in the Seep
Characterization Report will be managed in a manner that will be
sufficient to protect public health, safety, and welfare,the environment,
and natural resources. This proposed amendment will go to public
comment. Duke Energy shall submit documentation that the proposed
modification has been submitted to the appropriate division within the
Department that has authority for approving modification of the
groundwater Corrective Action Plan and/or Closure Plan. The content of,
and DEQ's review of, an amendment to a groundwater Corrective Action
Plan shall be consistent with Title 15A, Chapter 2L of the N.C.
Administrative Code(specifically including 2L.0106(h)-(o)). The
amendment to the Corrective Action Plan and/or Closure Plans shall be
implemented by Duke Energy in accordance with the deadlines contained
therein, as approved or conditioned by the Department. Failure by Duke
Energy to implement the amendment will be handled in the normal course
by the Department in accordance with its enforcement procedures (i.e.,
outside this Special Order). Notwithstanding the foregoing provisions of
this paragraph, any cooling pond seeps contained in the Seep
Characterization Report shall be addressed in a separate report(rather than
a proposed amendment to the groundwater Corrective Action Plan and/or
Closure Plan), specific to the matters of those seeps, and describe how
remaining cooling pond seeps will be managed in a manner that will be
sufficient to protect public health,safety, and welfare,the environment,
and natural resources. The report shall be submitted to DWR's Complex
3 If any seep is dispositioned between the time that the Final Seep Report is submitted and the
time the Seep Characterization Report is submitted, an analysis of the manner of disposition
must be included in the Seep Characterization Report,and Duke Energy must seek certification
of such a disposition from the Director of DWR. Only if such certification is received prior to
the due date of the proposed amendment described in paragraph 2(b)(7)may such a seep,
certified as dispositioned, be omitted from the proposed amendment.

EMC SOC WQ S 18-006
Duke Energy Progress,LLC
p. 10
Permitting Unit within 60 days of the submittal of the Seep
Characterization Report("Cooling Pond Seep Report").
For clarity,listed below is a summary of the timetable for the documents due after
completion of steps above:
Document Due Date
Final Seep Report October 31, 2021
Seep Characterization Report December 31,2021
Proposed amendment to groundwater
Corrective Action Plan and/or Closure February 28,2022
Plan, and/or Cooling Pond Seep
Report
8) Termination of Special Order
This Special Order shall terminate on the later of the following dates:
• January 31, 2022; or
• 30 days following the approval of an amended groundwater
Corrective Action Plan and/or Closure Plan, as appropriate(if an
amendment is submitted in compliance with subparagraph 2(b)(7)
above).
c. Interim Action Levels.
1) Upon the complete execution of this Special Order,with regard to non-
constructed seeps,interim action levels for the receiving waters (which are
minor tributaries)are hereby established as noted in Attachment A. The
interim action levels are site-specific. Duke Energy shall monitor at
approved sampling sites to ensure interim action levels are met. Interim
action levels shall remain effective in the designated surface waters until
the applicable termination date in paragraph 2(b)(8)is reached.
2) Duke Energy shall perform monitoring of waters receiving flow from non-
constructed seeps in accordance with the schedules listed in Attachments
A and B,except as noted in paragraph 2(c)(3)below.

EMC SOC WQ S 18-006
Duke Energy Progress,LLC
p. 11
3) If the monitoring of any classified water of the State receiving flow from
seeps regulated by this Special Order indicates exceedance of any interim
action level established by the Special Order,Duke Energy shall increase
monitoring at that location from quarterly to monthly until concentrations
of monitored characteristics return to those observed at the initiation of the
Special Order. If any interim action level established by the Special Order
is exceeded by more than 20%in a single sampling event, or exceeded for
two(2) consecutive monitoring events,in addition to paying the
associated stipulated penalty,Duke Energy shall conduct a re-assessment
of the contributing seep(s),including,but not limited to,evaluation of
proposed remedial actions for treatment and/or control of the seep such
that impacts to the receiving waters are quickly mitigated. A report
compiling the findings of the re-assessment,including proposed remedial
actions, shall be provided to the Director of DWR within 60 days of any
applicable exceedance. Following its review,DWR shall notify Duke
Energy of its concurrence or disapproval of Duke Energy's proposed
remedial actions.
4) Monitoring associated with seeps covered by this Special Order is exempt
from the electronic reporting requirements associated with NPDES
permits. Results of monitoring required exclusively per the terms of this
Special Order shall be reported to the Director of DWR in a
spreadsheet/worksheet format agreed to by Duke Energy and DWR.
Monitoring data shall be submitted to the Director of DWR in a digital
format no later than 30 days following the end of each calendar quarter for
as long as the Special Order is in effect. Monitoring data shall be sent to
the following email address: [e-mail]. Data from those
sites with monitoring required exclusively per the terms of the Special
Order will be posted on DWR's website to provide the public with the
opportunity for viewing.
3. Duke Energy will continue to operate the H. F. Lee Facility's coal ash surface
impoundments in such a manner that their performance is optimized,and potential for
surface waters to be affected by seeps is minimized.
4. Duke Energy shall make available on its external website the NPDES permits, this
Special Order and all reports required under this Special Order for the H. F. Lee Facility
no later than thirty(30) days following their effective or submittal dates.

•
EMC SOC WQ Si 8-006
Duke Energy Progress,LLC
p. 12
5. Duke Energy and the Commission agree that the stipulated penalties specified in
paragraph 2(a)(2)are not due if Duke Energy satisfies DWR that noncompliance was
caused solely by:
a. An act of God;
b. An act of war;
c. An intentional act or omission of a third party,but this defense shall not be
available if the act or omission is that of an employee or agent of Duke Energy or
if the act or omission occurs in connection with a contractual relationship with
Duke Energy;
d. An extraordinary event beyond the Duke Energy's control, specifically including
any court order staying the effectiveness of any necessary permit or approval.
Contractor delays or failure to obtain funding will not be considered as events
beyond Duke Energy's control; or
e. Any combination of the above causes.
6. Failure within thirty(30) days of receipt of written demand by DWR to pay the stipulated
penalties,or challenge them by a contested case petition pursuant to G.S. 150B-23,will
be grounds for a collection action,which the Attorney General is hereby authorized to
initiate. The only issue in such an action will be whether the thirty(30)days has elapsed.
7. Any non-constructed seeps causing or contributing to pollution of waters of the State
associated with the coal ash impoundments and the cooling pond at Duke Energy's H. F.
Lee Facility, and listed in Attachment A to this Special Order,are hereby deemed
covered by this Special Order. Any newly-identified non-constructed seeps discovered
while this Special Order is in effect, and timely reported to the Department per the terms
of CAMA and this Special Order, shall be deemed covered by the terms of the Special
Order, retroactive to the time of their discovery. Newly-identified non-constructed seeps
must be sampled for the presence of those characteristics listed in Attachment B to this
Order. Newly-identified non-constructed seeps found to be causing or contributing to
pollution of the waters of the State,with the effect of causing a violation of water quality
standards in surface waters not already referenced in the Special Order,may require
modification of the Special Order to address those circumstances.
8. Noncompliance with the terms of this Special Order is subject to enforcement action in
addition to the above stipulated penalties, including,but not limited to injunctive relief
pursuant to G.S. 143-215.6C or termination of this Special Order by the Director of DWR
upon ten(10)days' notice to Duke Energy. Noncompliance with the terms of this
Special Order will not be subject to civil penalties in addition to the above stipulated
penalties.

EMC SOC WQ S 18-006
Duke Energy Progress,LLC
p. 13
9. This Special Order and any terms or conditions contained herein,hereby supersede any
and all previous Special Orders,Enforcement Compliance Schedule Letters,terms,
conditions,and limits contained therein issued in connection with NPDES permit
NC0003417.
10. This Special Order may be modified at the Commission's discretion,provided the
Commission is satisfied that Duke Energy has made good faith efforts to secure funding,
complete all construction, and achieve compliance within the dates specified. In
accordance with applicable law,modification of this Special Order will go to public
notice prior to becoming effective.
11. Failure to pay the up-front penalty within thirty(30)days of execution of this Special
Order will terminate this Special Order.
12. In addition to any other applicable requirement, each report required to be submitted by
Duke Energy under this Special Order shall be signed by a plant manager or a corporate
official responsible for environmental management and compliance, and shall include the
following certification:
I certify under penalty of law that this document and all attachments
were prepared under my direction or supervision in accordance with
a system designed to assure that qualified personnel properly gather
and evaluate the information submitted. Based on my inquiry of the
person or persons who manage the system,or those persons directly
responsible for gathering the information,the information submitted
is, to the best of my knowledge and belief, true, accurate, and
complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fine and
imprisonment for knowing violations.
13. This Special Order shall become effective in accordance with state law, and once
effective,Duke Energy shall comply with all schedule dates,terms, and conditions
herein.

EMC SOC WQ S 18-006
Duke Energy Progress,LLC
p. 14
This Special Order by Consent shall expire no later than February 28,2023.
F e En Progress, LLC:
( 2 /L61
Paul Draovitch Date
Senior Vice President,Environmental,Health& Safety
For the No lira Environmental Management Commission:
/71 -2-42 Li
J.D Sol ,P.E.
C air of he Commission Date

Attachment A
S18-006
Duke Energy Progress,LLC—H.F.Lee Energy Complex,p.1
SeepID Approximate Receiving
Receiving Interim Action
Location Coordinates Description Waterbody SOC Monitoring
Number Waterbody Levels
Latitude Longitude Classification
Seep from the land area north of the cooling Instream
pond,between the cooling pond and the N/A—2B Standards
LOLA 5-01 35.379568 -78.075043 Neuse River.Not a seep emanating from the Neuse River WS-IV;NSW monitoring of the Apply
active ash basin. Neuse River
Seep from the land area north of the cooling Instream
pond,between the cooling pond and the N/A 28 Standards
LOLA S-01A 35.379648 -78.074632 of the
Neuse River.Not a seep emanating from the Neuse River WS-IV;NSW monitoring Apply
Neuse River
active ash basin.
Seep from the land area north of the cooling Instream
LOLA 5-018 35.380846 -78.077697 pond,between the cooling pond and the Neuse River WS-IV;NSW monitoring of the f N/A—28 Standards
Neuse River.Not a seep emanating from the Neuse River Apply
} active ash basin.
Low volume seep to small channel north of i Ditch system
draining areas
active ash basin at the toe of the dike.Flows Monitoring at
S-01 35.386858 -78.073453 west,then south,toward confluence with north and WS-IV;NSW location S-03A See 5-03A
} Neuse River at sampling site S-03A. west of active
ash basin
low volume seep to small channel north of Ditch system
draining areas
active ash basin at the toe of the dike.Flows Monitoring at
S-02 35.384001 -78.081383 north and WS-IV;NSW See S-03A
west,then south,toward confluence with location S-03A
Neuse River at sampling site S-03A. west of active
ash basin
'Location previously investigated as a seep. Monitoring has not indicated the presence of coal combustion residuals.
••Seep dispositioned via repair and/or non-flowing condition to potentially reach WOTUS,or other,as noted.
Monitoring shall be conducted at the approximate locations Indicated on the attached site map.
All monitoring shall be conducted per the requirements found in Attachment B of this Order.

Attachment A
518-006
Duke Energy Progress,LLC-H.F.Lee Energy Complex,p.2
Approximate Receiving
Seep ID ! Receiving
Location Coordinates I Description j Waterbody SOC Monitoring j Interim Action Levels
Number — Waterbody Classification
Latitude Longitude
Ditch system —
Channel on west side of active ash basin.Directs draining areas
5-03** 35.382666 -78.084374 flow from ditch on north side of active ash basin north and ; WS-IV;NSW Monitoring at See S-03A
south toward Neuse River. Not a seep. west of active C location S-03A
—1_.__..___..__________..___._..._____� ._ Monitoring at
ash basin _ !
r ! Ditch system
Site just before confluence of S-03 channel draining areas Arsenic 400 µg/L
S-03A*" 35.381806 -78.084052 conveying flow from upstream sites and the north and WS-IV;NSW location 5-03A Hardness 500 mg/L
Neuse River. Not a seep. west of active i prior to entering
j Neuse River TDS 800 mg/L
ash basin ;
Instream
S-04 35.381993 -78.078784 Stagnant,ponded water inland from river terrace ! Neuse River WS-IV;NSW monitoring of N/A—28 Standards
below southwest side of active ash basin. Apply
the Neuse River
Static AOW near riprap area on the south side of
the southeast corner of active ash basin. N/A-Seep N/A-Seep
S-05"* 35.379045 -78.070293 , Neuse River WS-IV;NSW Location has been repaired.No flow observed in I Dispositioned Dispositioned
recent observations.
Low volume seep to small channel on east side of Ditch system
draining areas I
S-06 35.386968 -78.071942 active ash basin at the toe of the dike.Flows north and east •i WS-IV;NSW Monitoring at See 5-09
south,toward confluence with Neuse River at of active ash location 5-09
sampling site 5-09. basin
Low volume seep to small channel on east side of
Ditch system
active ash basin at the toe of the dike.Flows draining areas Monitoring at
S-07 35.382767 -78.069655 north and east I WS-IV;NSW See 5-09
south,toward confluence with Neuse River at of active ash location S-09
sampling site S-09.
basin
*Location previously investigated as a seep. Monitoring has not indicated the presence of coal combustion residuals.
**Seep dispositioned via repair and/or non-flowing condition to potentially reach WOTUS,or other,as noted,
Monitoring shall be conducted at the approximate locations indicated on the attached site map.
All monitoring shall be conducted per the requirements found in Attachment B of this Order.

Attachment A
S18-006
Duke Energy Progress,LLC—H.F. Lee Energy Complex,p.3
Approximate
Seep ID Location Coordinates Receiving Receiving
Number I Description Waterbody Waterbody SOC Monitoring Interim Action Levels
Latitude j Longitude Classification
Static AOW near riprap area on the east side of Ditch system
the southeast corner of active ash basin.Anydraining areas
5-08 35.38051 -78.068532 north and east WS-IV;NSW Monitoring at See S-09
flow collects in channel and flows south toward of active ash location S-09
5-09.No flow observed in recent observations. basin _
MonitoringlocationJust before confluence of Ditch system
Monitoring at
channel on east side of active ash basin draining areas Arsenic 400 µg/L
5-09** 35.379492 -78.067718 north and east WS-IV;NSW location 5-09 Hardness 500 mg/L
conveying flow from upstream sites and the of active ash prior to entering TOS 800 mg/L
Neuse River. Not a seep. basin Neuse River
N/A28 Apply
Stagnant,ponded water inland from river terrace Instream —
S-18 35.379222 I -78.101206 Neuse River WS-IV;NSW monitoringof the
below east side of inactive ash basin. Neuse River
•
Stagnant,ponded water inland from river terrace
5-19* 35.38179 j -78.097649 below northeast side of inactive ash basin. From Neuse River I WS-IV;NSW N/A—Seep N/A—Seep
1 sampling—No CCR impacts. Dispositioned Dispositioned
-- -
Seep near well CMW-10,along the south side of
5-20** 35.382406 -78.082051 I active ash basin.Location has been repaired to Neuse River ' WS-IV;NSW N/A—Seep N/A—Seep
eliminate seep. Dispositioned Dispositioned
Stagnant seep along south side of active ash
5-21" 35.382151 -78.080376 basin.Any flow reinfiiltrates prior to reaching Neuse River WS-IV;NSW N/A—Seep N/A—Seep
surface water. Dispositioned Dispositioned
' Seep along south side of active ash basin. Flows 1 itoringm N/A—2B Standards
5-22 35.381466 -78.077819 toward Neuse River. ' Neuse River WS-IV;NSW monitoring of the Apply
Neuse River•
FP y
Seepalongsouth side of active ash basin. Flows Instream
5-23 35.381175 -78.077136 N/A-265tandards
NSWmonitoring
toward Neuse River. Neuse River WS IV; of the
•
Neuse River APpIY
'Location previously investigated as a seep. Monitoring has not indicated the presence of coal combustion residuals.
"Seep dispositioned via repair and/or non-flowing condition to potentially reach WOTUS;or other,as noted.
Monitoring shall be conducted at the approximate locations indicated on the attached site map.
All monitoring shall be conducted per the requirements found in Attachment B of this Order

•
•
Attachment A
S18-006
Duke Energy Progress,LLC—H.F.Lee Energy Complex,p.4
Approximate Receiving
Seep ID Receiving
Location Coordinates Description Waterbody SOC Monitoring Interim Action Levels
Number Waterbody
Latitude LongitudeInstream
Classification
S-24 35.381063 -78.076431 , Seep along south side of active ash basin. Flows Neuse River WS-IV;NSW monitoring of the N/A—28 Standards
toward Neuse River. Neuse River Apply
Instream
5-25 35.380922 -78.076001 Seep along south side of active ash basin. Flows Neuse River WS-IV;NSW monitoring of the N/A—2B Standards
toward Neuse River. Apply
Neuse River
Seep within a small drainage channel for ponded Instream
5-26 35.38164 -78.078322 water within the river bank below south side of Neuse River WS-IV;NSW monitoring of the N/A—2B Standards
active ash basin. Flows toward Neuse River. ; Neuse River Apply
Ditch system
Low volume seep to small channel north of draining areas
active ash basin at the toe of the dike.Flows Monitoring at
S-27 35.385848 } -78.075999 north and WS-IV;NSW See S-03A
west,then south,toward confluence with Neuse west of active location S-03A
River at sampling site 5-03A.
ash basin
Low volume seep to small channel north of Ditch system
draining areas
active ash basin at the toe of the dike.Flows Monitoring at
5-28 35.3851331 ; -78.078197 north and WS-IV;NSW See S-03A
west,then south,toward confluence with Neuse location 5-03A
River at sampling site S-03A. west of active
ash basin
Seep to Halfmile Branch on southwest side of Halfmile Instream See Halfmile Branch
S-29 35.37862 -78.10593 retired ash basin#2. Branch WS-IV;NSW monitoring of Instream Monitoring
Halfmile Branch (p.8)
'Location previously investigated as a seep. Monitoringhas not indicated the presence of coal combustion residuals.
**Seep dispositioned via repair and/or non-flowing condition to potentially reach WOTUS,or other,as noted.
Monitoring shall be conducted at the approximate locations indicated on the attached site map.
All monitoring shall be conducted per the requirements found in Attachment B of this Order.

•
Attachment A
518-006
Duke Energy Progress,LLC—H.F.Lee Energy Complex,p.5
Approximate Receiving
Seep ID Location Coordinates Description Receiving Waterbody SOC Monitoring Interim Action Levels
Number Waterbody
Latitude Longitude Classification
Seep from the berm surrounding the cooling Instream
CPS-01 35.37924 -78.07377 pond.Not a seep emanating from the active ash Reuse River WS-IV;NSW monitoring of the N/A—26 Standards
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream
CPS-02 35.37901 -78.07298 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the N/A—26 Standards
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream N/A_28 Standards
CPS-03 35.37895 -78.06270 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream I N/A—28 Standards
CPS-04 35.37902 -78.06707 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream
CPS-05 I 35.37998 -78.06574 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoringof the N/A—28 Standards
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream N/A-28 Standards
CPS-06 35.37179 ' -78.06642 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the Apply
basin. j Neuse River
Seep from the berm surrounding the cooling Instream N/A 28 Standards
CPS-07 35.37177 -78.06661 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the
basin. Neuse River Apply
*Location previously investigated as a seep. Monitoring has not indicated the presence of coal combustion residuals.
.•Seep dispositioned via repair and/or non-flowing condition to potentially reach WOTUS,or other,as noted.
Monitoring shall be conducted at the approximate locations indicated on the attached site map.
All monitoring shall be conducted per the requirements found in Attachment B of this Order

Attachment A
518-006
Duke Energy Progress,LLC-H.F.Lee Energy Complex,p.6
Approximate ..__. Y Classification __-.__------
PP Receiving
Seep ID Receiving
Location Coordinates Description WaterbodySOC MonitoringInterim Action Levels
Number -.-.-- Waterbod
Latitude Longitude
•
Seep from the berm surrounding the cooling Instream N/A-28 Standards
CPS-08 35.37711 -78.06780 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the ,
basin. f Neuse River Apply
Seep from the berm surrounding the cooling Instream
CPS-09 35.36922 -78.07880 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the N/A-2B Standards
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream
CPS-10 35.36840 -78.08125 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the N/A-28 Standards
basin. Neuse River
Apply
Seep from the berm surrounding the cooling Instream •
CPS-11 35.36829 -78.08141 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the N/A-28 Standards
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream
N/A-28 Standards
CPS-12 35.36816 -78.08156 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the
basin. Neuse River Apply
Seep from the berm surrounding the cooling • Instream N/A-2B Standards
CPS-13 35.37972 -78.07540 pond.Not a seep emanating from the active ash Neuse River ! WS-IV;NSW monitoring of the
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream
CPS-14 35.37963 -78.07527 pond.Not a seep emanating from the active ash Neuse River ! WS-IV;NSW monitoring of the N/A-2B Standards
basin. Neuse River Apply
`Location previously investigated as a seep. Monitoring has not indicated the presence of coal combustion residuals.
**Seep dispositioned via repair and/or non-flowing condition to potentially reach WOTUS,or other,as noted.
Monitoring shall be conducted at the approximate locations indicated on the attached site map.
All monitoring shall be conducted per the requirements found in Attachment B of this Order.

Attachment A
S18-006
Duke Energy Progress,LLC—H. F. Lee Energy Complex,p.7
Approximate
Seep ID Location Coordinates Receiving Receiving
Description Waterbody SOC Monitoring Interim Action Levels
Waterbody
Number Latitude Longitude Classification
Seep from the berm surrounding the cooling j Instream N/A—2B Standards
CPS-15 35.37962 -78.07460 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW i monitoring of the
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream N/A—2B Standards
CPS-16 35.37942 -78.07423 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream
CPS-17 35.37465 -78.06165 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the N/A—2B Standards
basin. Neuse River ! Apply
Seep from the berm surrounding the cooling Instream
CPS-18 35.37195 -78.06605 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the N/A—26 Standards
basin. Neuse River Apply
Seep from the berm Surrounding the cooling Instream N/A—28 Standards
CPS-19 35.37192 -78.06625 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the
i basin. Neuse River Apply
- -
Seep from the berm surrounding the cooling Instream
CPS-20 35.37202 -78.06630 pond.Not a seep emanating from the active ash Neuse River I WS-IV;NSW monitoring of the N/A—28 Standards
basin. Neuse River Apply
Seep from the berm surrounding the cooling Instream
CPS-21 35.36983 -78.07580 pond.Not a seep emanating from the active ash Neuse River WS-IV;NSW monitoring of the N/A—2B Standards
basin. Neuse River Apply
_ I
*Location previously investigated as a seep. Monitoring has not Indicated the presence of coal combustion residuals.
**Seep dispositioned via repair and/or non-flowing condition to potentially reach WOTIIS,or other,as noted.
Monitoring shall be conducted at the approximate locations indicated on the attached site map.
All monitoring shall be conducted per the requirements found in Attachment B of this Order.

Attachment A
S18-006
Duke Energy Progress,LLC—H.F.Lee Energy Complex,p.8
Instream Monitoring
Receiving Waterbody
Description Receiving Waterbody Classification SOC Monitoring Interim Action Levels
Instream Monitoring to Upstream&Downstream Monitoring of the N/A—2B Standards
evaluate potential impacts Neuse River WS-IV;NSW Neuse River Apply
from seeps
Instream Monitoring to
evaluate potential impacts Halfmile Branch WS-IV;NSW Upstream&Downstream Monitoring of I Mercury 0.02 IRA
from seeps Halfmile Branch Selenium 30 µg/L
*Location previously investigated as a seep. Monitoring has not indicated the presence of coal combustion residuals.
**Seep dispositioned via repair and/or non-flowing condition to potentially reach WOTUS,or other,as noted.
Monitoring shall be conducted at the approximate locations indicated on the attached site map.
All monitoring shall be conducted per the requirements found in Attachment B of this Order.

H. F. Lee Energy Complex —Water Quality Monitoring
N
* s �.-t
Ash
`" 5-03A Basin
ease
N
tid/, Rivet s-09
'�
Cooling
`+1' '•‘, Pond
8 t.t 4 " . '..n
riiip" ,..
a *0-" 44 � 1
IPA.
Upstream: Halfmile Branch & Neuse River
"* Stream Monitoring
* Downstream: Halfmile Branch& Neuse River

•
SOC S18-006
Duke Energy Progress, LLC—H. F. Lee Plant
Attachment B
Monitoring Requirements
The following represents the parameters to be analyzed and reported at all monitoring locations
designated within this Special Order.
Parameter Reporting Units Monitoring
Frequency
TSS mg/L } Annually
Oil and Grease mglL Annually
pH Standard Units(s. u.) Quarterly
Fluoride pg/L Quarterly
Total Mercury ng/L Quarterly
Total Barium pg/L Quarterly
Total Zinc j pg/L Quarterly
Total Arsenic pg/L Quarterly
Total Boron pg/L Quarterly
Total Cadmium pg/L Quarterly
Total Chromium pg/L Quarterly
Total Copper pg/L Quarterly
Total Thallium pg/L Quarterly
Total Lead pg/L Quarterly
Total Nickel ! pg/L Quarterly
Total Selenium pg/L Quarterly
Nitrate/Nitrite as N mg/L Quarterly
Bromides mg/L Quarterly
Sulfates mg/L Quarterly
Chlorides mg/L Quarterly
TDS mg/L Quarterly
Total Hardness j mg/L 1 Quarterly
Temperature ° C Quarterly
Conductivity, pmho/cm pmho/cm Quarterly
Analyses of all monitoring conducted per the terms of this SOC shall conform to the requirements of 15A
NCAC 2B .0505(e)(4)and(5);i.e.,standard methods and certified laboratories shall be used.

Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
APPENDIX B
NPDES PERMIT NC0003417
•
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synTerra
Science& Engineering Consultants

ROY COOPER' ;
;N'
Governor "^
MICHAEL S.REGAN , 4.. =, ?
Secretor '' '�aw wo
Y mow-.,, .
S.DANIEL SMITH NOR f. .,aF,OLiNA
Director Environmental Quality
February 28,2020
Mr. Paul Draovitch,Senior Vice President
Environmental, Health and Safety
Duke Energy Carolinas,LLC
Mail Code EC13K
P.O. Box 1006
Charlotte,North Carolina 28201-1006
Subject: Permit Major Modification
Permit NC0003417
H.F. Lee Energy Complex
Wayne County
Facility Class I
Dear Mr. Draovitch:
We have received your request to add two new outfalls to the subject facility to facilitate
excavation of the coal ash from the inactive ash ponds. The request has been granted.
Enclosed with this letter is modified permit. Please replace the existing permit with the
modified permit.
The permit modification contains the following significant changes from your current
permit:
• Outfalls 005a and 005b have been added to the permit.
No other changes have been made. This permit modification is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between North Carolina and the U.S. Environmental Protection Agency.
Please take notice that this permit is not transferable. Part II, E.4. addresses the requirements
to be followed in case of change in ownership or control of this discharge.
-"� North Carolina Department of Environmental Quality i Division of Water Resources
DE. Q 512 North Salisbury Street ! 1617 Mail Service Center 1 Raleigh,North Carolina 27699 1617
v4rtn+ -
919.707,9000 'r

If you have any questions or need additional information, please contact Sergei Chernikov,
telephone number(919) 707-3606 or email: [e-mail].
Sincerely,
•
Daniel Smith, ector
'vision of Water Resources
cc: Central Files
NPDES Files
Washington Regional Oftice/Water Quality
\t SS/:Aquatic'I"oxicologv Unit(e-copy)
EPA Region IV (e-cope)

Permit NC000341 7
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North 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.
Duke Energy Progress, LLC
is hereby authorized to discharge wastewater from a facility located at
H.F. Lee Energy Complex
1199 Black Jack Church Road
Goldsboro, North Carolina
Wayne County
to receiving waters designated as the Neuse River in the Neuse River Basin
in accordance with effluent limitations, monitoring requirements. and other applicable
conditions set forth in Parts I. II. and III hereof.
The Major Modification shall become effective April 1. 2020.
This permit and the authorization to discharge shall expire at midnight on March 31. 2024.
Signed this day February 28. 2020.
aniel Smith ir.ector
ision of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 30

Permit NC000341 7
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility. whether for operation or discharge are hereby
revoked. As gf 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 included herein.
Duke Energy Progress, LLC.
is hereby authorized to:
1. Continue to discharge the following treated wastestreams from the H. F. Lee Energy
Complex located at 1199 Black Jack Church Road, Goldsboro, Wayne County:
• Outfall 001 -Active Ash Basin - 2.16 MGD
No process wastewaters are discharged to Outfall 001.
o Ash Pond Decant, Phase I
o Ash Pond Dewatering and Groundwater Extraction, Phase II
o Ash Pond Groundwater Extraction. Phase III
• Outfall 002 and 002A - Cooling Pond- No Flow Limit
The facility uses an existing 545 acre closed-cycle cooling pond with baffled dikes to
treat recirculating condenser cooling and process water.
o Recirculated condenser cooling water (-369 MGD)
o Lee Combined Cycle Plant Site wastewaters:
o Cooling tower blowdown from the Wet Surface Air Cooler and the combined
cycle Heat Recovery Steam Generator (HRSG),
o Wayne County Combustion Turbine Site wastewaters from the sump lift
station,
o Wayne County Combustion Reverse osmosis reject wastewaters from the
water treatment plant and RO cleaning wastewaters
o Filter plant wastewaters
o Low volume Wastewaters
o Stormwater from drains and Combustion Turbine Site secondary containment
and fuel forwarding area
o Equipment and containment drains and wash waters
o Miscellaneous wastewaters as described in the application
o Coal pile runoff(ceased)
o Outfall 002A- additional outfall to be used only during severe weather or
required maintenance
No metal cleaning wastes shall be discharged to Outfall 002 or Outfall 002A.
Page 2 of 30

Permit NC0003417
• Outfall 003 - Lee Combined Cycle Plant Site Wastewaters (Optional)- No Flow Limit
o Lee Combined Cycle Plant Site wastewaters:
o Cooling tower blowdown from the Wet Surface Air Cooler and the combined
cycle Heat Recovery Steam Generator (HRSG).
o Wayne County Combustion Turbine Site wastewaters from the sump lift
station.
o Wayne County Combustion Reverse osmosis reject wastewaters from the
water treatment plant and RO cleaning wastewaters
a Filter plant wastewaters
o Equipment and containment drains and wash waters
No metal cleaning wastes shall be discharged to Outfall 003.
• Outfall 004 - Coal Ash Beneficiation Plant - No Flow Limit
The facility shall treat wastewater discharged from the beneficiation plant in a
retention pond and an oil/water separator.
Beneficiation Plant wastewaters:
o Truck wash water
o Dust suppression water
o Stormwater
The effluent from the Coal Ash Beneficiation Plant can be discharged to the Neuse
River via Outfall 004 or to the Cooling Pond (Outfall 002).
• Outfall 005a (Latitude 35° 22' 40.40": Longitude 78° 6' 7.64") - Inactive basin 1 and 2,
including stormwater runoff, groundwater, and interstitial water- 1 MGD.
• Outfall 005b (Latitude 35° 22' 21.94": Longitude 78° 6' 11.65") - Inactive basin 3,
including stormwater runoff, groundwater. and interstitial water- 1 MGD.
2. Discharge from said treatment works via Outfalls 001. Outfalls 002 and 002A. Outfall
003, Outfall 004, Outfall 005a, and Outfall 005b into the Neuse River. a Class WS-IV;
NSW water in the Neuse River Basin, at the locations specified on the attached map.
Page 3 of 30

•
Permit NC0003417
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Phase I -
Ash Pond Decant - Outfall 001) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until commencement of
dewatering. or expiration, the permittee is authorized to discharge effluent from Outfall 001
(decanting the free water above the settled ash layer that does not involve mechanical
disturbance of the ash). Such discharges shall be limited and monitored! by the permittee as
specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location2
Flow. MGD 2.16 Daily Pump Logs Effluent
pH3 6.0_< pH S 9.0 2/Month Grab Effluent
Total Suspended Solids4 30.0 mg/L 100.0 rng/L 2/Month Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/I, 2/Month Grab Effluent
Total Kjeldahl Nitrogen
(TKN), mg/L Monthly Grab Effluent
Total Nitrogen (TN), mg/L Monthly Calculated Effluent
TN = (NO2 + NO3) +TKN
TN Load Monitor& Report (lbs/month) Monthly Calculated
Monitor& Report (lbs/year) Annually Calculated Effluent
Total Phosphorus. mg/I, Monthly Grab Effluent
Chronic Tox city6 Monthly Grab Effluent
Turbidity'', NTU _ Monthly Grab Effluent
Total Hardness, mg/L Monthly Grab Effluent
(CaCO3]
Total Arsenic, pg/L Weekly Grab Effluent
Total Mercury8, ng/L Weekly Grab Effluent
Total Selenium. pg/L Weekly Grab Effluent
Total Chromium, pg/L Monthly Grab Effluent
Total Lead. pg/L Monthly Grab Effluent
Total Cadmium, pg/L
Grab Effluent
Total Copper, pg/L Monthly Grab Effluent
Total Zinc. i /L Monthly Grab Effluent
TDS. mg/L Monthly Grab Effluent
Nitrate/nitrite as N, mg/L Monthly Grab Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (27.).
2. Effluent sampling shall be conducted at the discharge from the ash settling pond prior to
mixing with any other waste stream.
3. The facility shall continuously monitor pH when the decanting process commences and the
decanting pump shall be shutoff automatically when 15 minutes running average pH falls
below 6.1 standard units or rises above 8.9 standard units. Pumping will be allowed to
continue after the pH issue has been resolved or if interruption might result in a dam failure or
damage.
4. The facility shall continuously monitor TSS concentration when the decanting process
commences, and the pump shall be shutoff automatically when one half of the Daily Maximum
limit (15 minutes average) is exceeded. Pumping will be allowed to continue after the TSS issue
Page 4 of 30

Permit NC000341 7
has been resolved or if interruption might result in a dam failure or damage. Continuous TSS
monitoring is only required when the pumps are employed.
5. See Special Condition A. (14.) Total Nitrogen Calculations
6. Chronic Toxicity (Ceriodaphnia) at 1.3%: Monthly; see Special Condition A. (11.).
7. The discharge from this facility shall not cause turbidity in the receiving stream to exceed 50
NTU. If the instream turbidity exceeds 50 NTU due to natural background conditions, the
discharge cannot cause turbidity to increase in the receiving stream. Therefore. if the effluent
measurement exceeds 50 NTU, the Permittee shall sample upstream and downstream turbidity
in the receiving waterbody, within 24 hours. to demonstrate the existing turbidity level in the
receiving waterbody was not increased. All data shall be reported on the DMRs. (See 15A
NCAC 2B .0211 (21)). NTU - Nephelometric Turbidity Unit.
8, The facility shall use EPA method 1631E.
a. When the facility commences the ash pond/ponds decanting/dewatering, the facility shall
treat the wastewater discharged from the ash pond using physical-chemical treatment. if
necessary. to assure state Water Quality Standards are not contravened in the receiving
stream. Duke Energy shall notify DWR NPDES Permitting and DWR Washington Regional
Office, in writing, within seven calendar days of installing additional physical-chemical
treatment at this Outfall.
b. The facility is allowed to drawdown the wastewater in the ash pond to no less than three feet
above the ash.
c. The rate for lowering the liquid level in a coal ash pond shall not exceed one (1) foot per day
unless a higher rate is supported to the satisfaction of DEMLR and in accordance with NCAC,
Title 15A, Subchapter 2K.
d. The facility shall use a floating pump station with free water skimmed from the basin
surface using an adjustable weir.
e. The limits and conditions in Section A. (2.) of the permit apply when water in the ash
settling basin is lowered below the three feet trigger mark.
f. The facility shall notify DWR NPDES Permitting Unit and DWR Washington Regional Office,
in writing, seven calendar days prior to the commencement of the dewatering.
g. If any one of these pollutants (As, Se, and Hg) reaches 85% of the allowable level during
decanting/dewatering, the facility shall immediately discontinue discharge from the
decanting/dewatering operations and report the event to the Washington Regional Office
and Complex NPDES Permitting Branch via telephone and e-mail.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
There shall be no discharge of polychlorinated biphenyls (PCBs).
This facility is currently classified as "non-nutrient bearing".
Page 5 of 30

•
Permit NC000341 7
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Phase II -
Ash Pond Dewatering and Groundwater Extraction - Outfall 001) [15A NCAC 02B
.0400 et seq., 02B .0500 et seq.]
During the period beginning on the commencement date of the dewatering operation and lasting
until completion of dewatering or expiration, the Permittee is authorized to discharge treated
effluent from Outfall 001 (ash pond dewatering or ash pond dewatering and groundwater
extraction from remediation wells). Such discharges shall be limited and monitored' by the
permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow 2.16 MGD Weekly Pump Logs Effluent
pH3 6.0 <_ pH <9.0 Weekly Grab Effluent
Total Suspended Solids4 30.0 mg/L 100.0 mg/L Weekly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Grab Effluent
Total Kjeldahl Nitrogen MonthlyGrab Effluent
(TKN).(FK , mg/L
Total Nitrogen (TN), mg/L Monthly Calculated Effluent
TN = (NO2 + NO3) +TKN
TN Lo ads Monitor & Report (lbs/month) Monthly Calculated Effluent
Monitor & Re ort (lbs/year) Annually Calculated
Total Phosphorus, mg/L Monthly Grab Effluent
Chronic Toxicity-3 Monthly Grab Effluent
Turbidity7, NTU Weekly Grab Effluent
Total Hardness. mg/L Weekly Grab Effluent
(CaCO3]
Total Arsenic. lag/L 3295 pg/L 21994 pg/L Weekly Grab Effluent
Total Mercury8, ng/L Weekly Grab Effluent
Total Selenium, pg/L Weekly Grab Effluent
Total Chromium, pg/L Weekly Grab Effluent
Total Lead, tag/L Weekly Grab Effluent
Total Cadmium. pg/L Weekly Grab Effluent
Total Copper, pg/L Weekly Grab Effluent
Total Zinc. pg/L Weekly Grab Effluent
TDS, mg/L Weekly Grab Effluent
Nitrate/nitrite as N. mg/L Weekly Grab Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (27.).
2. Effluent sampling shall be conducted at the discharge from the ash settling pond prior to
mixing with any other waste stream.
3. The facility shall continuously monitor pH when the dewatering process commences and the
dewatering pump shall be shutoff automatically when 15 minutes running average pH falls below
6.1 standard units or rises above 8.9 standard units. Pumping will be allowed to continue after the
pH issue has been resolved or if interruption might result in a dam failure or damage.
4. The facility shall continuously monitor TSS concentration when the dewatering process
commences, and the dewatering pump shall be shutoff automatically when one half of the Daily
Maximum limit (15 minutes average) is exceeded. Pumping will be allowed to continue after the
Page 6 of 30

4
Permit NC000341 7
TSS issue has been resolved or if interruption might result in a dam failure or damage. Continuous
TSS monitoring is only required when the pumps are employed.
5. See Special Condition A. (14.) Total Nitrogen Calculations
6. Chronic Toxicity (Ceriodaphnia) at 1.3%; Monthly; see Special Condition A. (11.).
7. The discharge from this facility shall not cause turbidity in the receiving stream to exceed 50 NTU.
If the instreain turbidity exceeds 50 NTU due to natural background conditions, the discharge
cannot cause turbidity to increase in the receiving stream. Therefore, if the effluent measurement
exceeds 50 NTU, the Permittee shall sample upstream and downstream turbidity in the receiving
waterbody, within 24 hours, to demonstrate the existing turbidity level in the receiving waterbody
was not increased. All data shall be reported on the DMRs. (See 15A NCAC 2B .0211 (21)). NTU -
Nephelometric Turbidity Unit
8. The facility shall use EPA method 1631E.
a. The rate for lowering the liquid level in a coal ash pond shall not exceed one (1) foot per day
unless a higher rate is supported to the satisfaction of DEMLR and in accordance with
NCAC, Title 15A, Subchapter 2K.
b. The facility shall use a floating pump station with free water skimmed from the basin
surface using an adjustable weir.
c. When the facility commences the ash pond/ponds decanting/dewatering, the facility shall
treat the wastewater discharged from the ash pond using physical-chemical treatment, if
necessary, to assure state Water Quality Standards are not contravened in the receiving
stream. Duke Energy shall notify DWR NPDES Permitting and DWR Washington Regional
Office, in writing, within seven calendar days of installing additional physical-chemical
treatment at this Outfall.
d. If any one of these pollutants (As, Se, and Hg) reaches 85°0 of the allowable levels during
decanting/dewatering, the facility shall immediately discontinue discharge from the
decanting/dewatering operations and report the event to the Washington Regional Office
and Complex NPDES Permitting Branch via telephone and e-mail.
e. When pond dewatering has finished and the discharge primarily consists of treated
groundwater extraction and remediation wastewater, Duke Energy shall sample and submit
a completed EPA Form 2C for Outfall 001 as soon as practicable, but no later than 180 days
from the commencement of groundwater remediation discharges through Outfall 001.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
There shall be no discharge of polychlorinated biphenyls (PCBs).
This facility is currently classified as "non-nutrient bearing".
Page 7 of 30

4
Permit NC0003417
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Phase III -
Groundwater Extraction - Outfall 001) [15A NCAC 02B .0400 et seq., 02B .0500 et
seq.]
During the period when ash pond dewatering has finished and beginning on the commencement
date of only groundwater remediation discharge and lasting until expiration, the Permittee is
authorized to discharge treated effluent from Outfall 001 (consisting of groundwater extraction
from remediation wells). Such discharges shall be limited and monitored; by the permittee as
specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location2
Flow 1.8 MGD Weekly Pump Logs Effluent
pH 6.0 < pH 5 9.0 2/ Month Grab Effluent
Total Kjeldahl Nitrogen
(TEN), mg/L Monthly Composite Effluent
Total Nitrogen (TN). mg/L Monthly Calculated Effluent
TN = (NO2 + NO3) +TEN
TN Load3 Monitor& Report (lbs/month) Monthly Calculated Effluent
Monitor& Report (lbs/year) Annually Calculated
Total Phosphorus, mg/L Monthly Composite Effluent
Chronic Toxicity; Monthly Composite Effluent
Turbidity5. NTU Monthly Grab Effluent
Total Hardness, mg/L Monthly Composite Effluent
ICaCO3)
Total Arsenic, pg/L Weekly Composite Effluent
Total Cadmium, pg/L Monthly Composite Effluent
Total Copper, pg/L Monthly Composite Effluent
Total Lead, pg/L Weekly Composite Effluent
Total Mercurys, ng/L Monthly Grab Effluent
Total Barium, mg/L Monthly Composite Effluent
Total Selenium. pg/L Weekly Composite Effluent
Nitrate/nitrite as N, mg/L Monthly Composite Effluent
Notes:
I. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (27.).
2. Effluent sampling shall be conducted at the discharge from the Wastewater Treatment System
prior to mixing with any other waste stream.
3. See Special Condition A. (14.) Total Nitrogen Calculations
4. Chronic Toxicity (Ceriodaphnia) at 1.0 %: Monthly; see Special Condition A. (11.).
5. The net turbidity shall not exceed 50 NTU using a grab sample and measured by the difference
between the effluent turbidity and the background turbidity. The sample for the background
turbidity shall be taken at point in the receiving waterbody upstream of the discharge location, and
the background turbidity and the effluent turbidity samples shall be taken within the same 24
hour period.
NTU - Nephelometric Turbidity Unit.
6. The facility shall use EPA method 1631E.
a. When pond dewatering has finished and the discharge primarily consists of treated
groundwater extraction and remediation wastewater. Duke Energy shall sample and submit
Page 8 of 30

Permit NC0003417
a completed EPA Form 2C for Outfall 001 as soon as practicable, but no later than 180 days
from the commencement of groundwater remediation discharges through Outfall 001.
b, If any one of these pollutants (As, Se, and Hg) reaches 85% of the allowable levels during
decanting/dewatering, the facility shall immediately discontinue discharge from the
decanting/dewatering operations and report the event to the Washington Regional Office
and Complex NPDES Permitting Branch via telephone and e-mail.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (COOLING
POND - OUTFALL 002) [15A NCAC 02B .0400 ET SEQ., 02B .0500 ET SEQ.]
During the period beginning on the effective date of this permit and lasting until expiration, the
permittee is authorized to discharge treated effluent from Outfall 002 (consisting primarily of
recirculated condenser cooling water, low volume wastes, cooling tower blowdown, combustion
turbine site wastewaters, reverse osmosis reject wastewaters, filter plant wastewaters, storm water,
coal pile runoff(ceased) and equipment wash waters). Such discharges shall be limited and
monitored' by the permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Averse Maximum Frequency Type Location
Flow. MGD2 Each Event Estimate Outfall Structure
Temperature3 32.0 'C Each Event Grab Outfall Structure
Total Suspended Solids 30.0 mg/L 50.0 mg/L Each Event Grab Outfall Structure
Oil and Grease 15.0 mg/L 20.0 mg/L Each Event Grab Outfall Structure
pH 6.0 <_ pH S 9.0 Each Event Grab Outfall Structure
Total Residual Chlorines 28.0 lag/I. Each Event Grab Outfall Structure
Free Available Chlorine4 200 lag/I. 500 pg/L Each Event Grab Outfall Structure
Fluoride, mg/L Each Event Grab Outfall Structure
Total Hardness, mg/L
(CaCO3) Each Event Grab Outfall Structure
Total Arsenic pg/L, Each Event Grab Outfall Structure
Total Chromium 200 pg/L 200 pg/L Each Event Grab Outfall Structure
Total Zinc 1000 pg/L 1000 pg/L Each Event Grab Outfall Structure
Total Lead, pg/L Each Event Grab Outfall Structure
Total Mercury5. ng/L Each Event Grab Outfall Structure
Total Molybdenum. pg/L1a/34 13,734 pg/L Each Event Grab Outfall Structure
Acute Episodic Toxicity6 See A. (10.) Grab Outfall Structure
The 126 Priority
Pollutants (40 CFR Part
423, Appendix A) No Detectable Amount Each Event Grab Outfall Structure
Exclusive of Zinc and
Chromium?
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (27.).
Page 9 of 30

Permit NC0003417
2. This discharge is permitted only in the following cases: a) caused by extreme rainfall: b) where
unavoidable to prevent loss of life, severe property damage. or damage to the cooling pond
structure: or c) for necessary maintenance activities. In the event that a discharge occurs. the
permittee shall inform the Washington Regional Office (252-946-6481) and the Neuse River Water
and Sewer Authority (252-522-2567) by telephone as soon as possible, but in no case later than 48
hours after the discharge occurs. The permittee shall also provide the following information, in
writing, to the Division within 10 days of the discharge: a) a description and cause of the
discharge: b) the duration of the discharge, including time and dates, anticipated time the
discharge is expected to continue, and steps being taken to reduce, prevent, and eliminate
reoccurrence of the discharge. The permittee shall take all reasonable steps necessary to minimize
any adverse impact to navigable waters resulting from the discharge. including such monitoring as
necessary to determine the environmental impact of the discharge.
3. As a result of this discharge, the temperature of the receiving water shall not be increased by more
than 2.8°C above ambient water temperature and in no case exceed 32°C.
4. Monitoring requirement for total residual chlorine applies only when chlorine is added to the
recirculating condenser cooling or process water discharged to the pond. Neither free available
chlorine nor total residual chorine may be discharged from any single generating unit for more
than two hours per day, unless the Permittee demonstrates to the Division that discharge for
more than two hours is required for macroinvertebrate control. The 500 pg/L is a daily
maximum limitation and is to be measured during the chlorine release period. The 200 pg/L
limitation is an average during the chlorine release period. Monitoring is required only when
chlorine is added to the cooling water system.
5. The facility shall use EPA method 1631E.
6. Acute Episodic Toxicity (Fathead Minnow 24-hr); LC50: see Special Condition A. (12.).
7. These limitations and monitoring requirements apply if these substances are added by the
Permittee for cooling tower maintenance. There shall be no detectable amounts of the 126 priority
pollutants (40 CFR 423 Appendix A) contained in chemicals added for coolingtower except for total
FP p
chromium and total zinc. Compliance with the limitations for the 126 priority pollutants in 40 CFR
Section 423.13(d)(1) may be determined by engineering calculations which demonstrate that the
regulated pollutants are not detectable in the final discharge by the analytical methods in 40 CFR
Part 136.
a. The permittee shall obtain authorization from the Division of Water Resources prior to using
any biocide in the cooling water; see condition A. (18.).
b. In accordance with 15A NCAC 2B .0505 (c)(4), sampling may be discontinued when flow
conditions or extreme weather conditions could result in injury or death of the person(s)
collecting samples. In such cases, on each day that sampling is discontinued, written
justification for the discontinuance shall be specified in the monitoring report for the month
in which the event occurred.
There shall be no discharge of polychlorinated biphenyls (PCBs).
There shall be no discharge of metal cleaning wastes.
There shall be no discharge of floating solids or foam visible in other than trace amounts.
Page 10 of 30

r ,
Permit NC0003417
A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Cooling
Pond - Outfall OO2A) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until expiration, the
permittee is authorized to discharge treated effluent from Outfall 002A only during severe
weather events or required maintenance (this wastewater primarily consists of recirculated
condenser cooling water, low volume wastes. cooling tower blowdown, combustion turbine site
wastewaters, reverse osmosis reject wastewaters, filter plant wastewaters, storm water. and
equipment wash waters). Such discharges shall be limited and monitored' by the permittee as
specified below;
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow. MGD2 Each Event Estimate Outfall Structure
Temperature3 32.0 °C Each Event Grab Outfall Structure
Total Suspended Solids 30.0 mg/L 50.0 mg/L Each Event Grab Outfall Structure
Oil and Grease 15.0 mg/L 20.0 mg/I. Each Event Grab Outfall Structure
pH 6.0 <_pH 5 9.0 Each Event Grab Outfall Structure
Total Residual Chlorine' 28.0 pg/L Each Event Grab Outfall Structure
Free Available Chlorine' 200 pg/L 500 pg/L Each Event Grab Outfall Structure
Fluoride, mg/L Each Event Grab Outfall Structure
Total Hardness, mg/L
[CaCO3) Each Event Grab Outfall Stricture
Total Arsenic pg/L, Each Event Grab Outfall Structure
Total Chromium 200 pg/L 200 pg/L Each Event Grab Outfall Structure
Total Zinc 1000 pg/L 1000 pig/L Each Event Grab Outfall Structure
Total Lead, pg/L Each Event Grab Outfall Structure
Total Mercury5, ng/L Each Event Grab Outfall Structure
Total Molybdenum, pg/L 13,734 13,734 Each Event Grab Outfall Structure
pg/L
Acute Episodic Toxicity6 See A. (10.) Grab Outfall Structure
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (27.).
2. This discharge is permitted only in the following cases: a) caused by extreme rainfall; b) where
unavoidable to prevent loss of life, severe property damage, or damage to the cooling pond
structure: or c) for necessary maintenance activities. In the event that a discharge occurs, the
permittee shall inform the Washington Regional Office (252-946-6481) by telephone as soon as
possible. but in no case later than 48 hours after the discharge occurs. The permittee shall also
provide the following information, in writing, to the Division within 10 days of the discharge: a) a
description and cause of the discharge; b) the duration of the discharge, including time and dates,
anticipated time the discharge is expected to continue, and steps being taken to reduce, prevent,
and eliminate reoccurrence of the discharge. The permittee shall take all reasonable steps
necessary to minimize any adverse impact to navigable waters resulting from the discharge,
including such monitoring as necessary to determine the environmental impact of the discharge.
3. As a result of this discharge, the temperature of the receiving water shall not be increased by more
than 2.8°C above ambient water temperature and in no case exceed 32°C.
4. Monitoring requirement for total residual chlorine applies only when chlorine is added to the
recirculating condenser cooling or process water discharged to the pond. Neither free available
Page 11 of 30

Permit NC000341 7
chlorine nor total residual chorine may be discharged from any single generating unit for more
than two hours per day, unless the Permittee demonstrates to the Division that discharge for
more than two hours is required for macroinvertebrate control. The 500 pg/L is a daily
maximum limitation and is to be measured during the chlorine release period. The 200 pg/L
limitation is an average during the chlorine release period. Monitoring is required only when
chlorine is added to the cooling water system.
5. The facility shall use EPA method 1631E.
6. Acute Episodic Toxicity (Fathead Minnow 24-hr); LC50; see Special Condition A. (12.).
a. The permittee shall obtain authorization from the Division of Water Resources prior to using
any biocide in the cooling water; see condition A. (18.).
b. In accordance with 15A NCAC 2B .0505 (c)(4), sampling may be discontinued when flow
conditions or extreme weather conditions could result in injury or death of the person(s)
collecting samples. In such cases, on each day that sampling is discontinued, written
justification for the discontinuance shall be specified in the monitoring report for the month
in which the event occurred.
There shall be no discharge of polychlorinated biphenyls (PCBs).
There shall be no discharge of metal cleaning wastes.
There shall be no discharge of floating solids or foam visible in other than trace amounts.
Page 12 of 30

Permit NC0003417
A. (6.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Wastewater
Pond - Outfall 003) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until expiration, the
permittee is authorized to discharge filter plant wastewaters,equipment and containment drains,
reverse osmosis reject and filter backwash, quenched heat recovery steam generator blowdown,
combustion turbine wash waters, and equipment wash water from Outfall 003. Such discharges
shall be limited and monitored1 by the permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow, MGD Daily Pump Logs Effluent
Temperature2 32.0 °C 2/ Month Grab Effluent
Total Suspended Solids 30.0 mg/L 100.0 mg/L 2/ Month Composite Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L 2/ Month Grab Effluent
pH 6.0 5 pH <_ 9.0 2/ Month Grab Effluent
Total Residual Chlorine3 28.0 pg/L 2/ Month Grab Effluent
Free Available Chlorine3 200 pg/L 500 pg/L 2/ Month Grab Effluent
Fluoride, mg/L Quarterly Grab Effluent
Total Hardness, mg/L
[CaCOs1 Quarterly Composite Effluent
Total Arsenic pg/L, Quarterly Composite Effluent
Total Chromium 200 pg/L 200 pg/L Monthly Composite Effluent
Total Zinc 1000 pg/L 1000 pg/L Monthly Composite Effluent
Turbidity5, NTU Monthly Grab Effluent
Total Lead, pg/L Quarterly Composite Effluent
Total Mercury, ng/L Quarterly Grab Effluent
Total Molybdenum, pg/L Quarterly Composite Effluent
Total Selenium, pg/L Quarterly Composite Effluent
Acute Toxicity6 See A.(11.) Composite Effluent
The 126 Priority
Pollutants (40 CFR Part
423, Appendix A) No Detectable Amount Annual 40 CFR 136 Effluent
Exclusive of Zinc and
Chromium?
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (27.).
2. As a result of this discharge, the temperature of the receiving water shall not be increased by more
than 2.8°C above ambient water temperature and in no case exceed 32°C.
3. Monitoring requirement for total residual chlorine applies only when chlorine is added to the
blowdown or process water discharged to the pond. Neither free available chlorine nor total
residual chorine may be discharged from any single generating unit for more than two hours
per day, unless the Permittee demonstrates to the Division that discharge for more than two
hours is required for macroinvertebrate control. The 500 pg/L is a daily maximum limitation
and is to be measured during the chlorine release period. The 200 pg/L limitation is an average
during the chlorine release period. Monitoring is required only when chlorine is added to the
cooling water system.
Page 13 of 30

Permit NC000341 7
4. The facility shall use EPA method 1631 E.
5. The discharge from this facility shall not cause turbidity in the receiving stream to exceed 50 NTU. If the
instream turbidity exceeds 50 NTU due to natural background conditions,the discharge cannot cause turbidity
to increase in the receiving stream. Therefore,if the effluent measurement exceeds 50 NTU,the Permittee shall
sample upstream and downstream turbidity in the receiving waterbody, within 24 hours, to demonstrate the
existing turbidity level in the receiving waterbody was not increased.All data shall be reported on the DMRs.
(See 15A NCAC 2B.0211 (21)). NTU-Nephelometric Turbidity Unit
6. Acute Episodic Toxicity (Fathead Minnow 24-hr); LC50; see Special Condition A. (12.).
7. These limitations and monitoring requirements apply if these substances are added by the
Permittee for cooling tower maintenance. There shall be no detectable amounts of the 126 priority
pollutants (40 CFR 423 Appendix A) contained in chemicals added for cooling tower except for total
chromium and total zinc. Compliance with the limitations for the 126 priority pollutants in 40 CFR
Section 423.13(d)(1) may be determined by engineering calculations which demonstrate that the
regulated pollutants are not detectable in the final discharge by the analytical methods in 40 CFR
Part 136.
a. The permittee shall obtain authorization from the Division of Water Resources prior to using
any biocide in the cooling water; see condition A. (18.).
b. When wastewater discharges to Outfall 003 commence, Duke Energy shall sample and
submit a completed EPA Form 2C for Outfall 003 as soon as practicable, but no later than
180 days from the commencement of discharge through Outfall 003.
There shall be no discharge of polychlorinated biphenyls (PCBs).
There shall be no discharge of metal cleaning g wastes.
There shall be no discharge of floating solids or foam visible in other than trace amounts.
Page 14 of 30

Permit NC0003417
A. (7.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Coal Ash
Beneficiation Plant - Outfall 004) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the commencement date of the beneficiation plant operations and
lasting until expiration, the Permittee is authorized to discharge from Outfall 004- Coal Ash
Beneficiation Plant discharge. Such discharges shall be limited and monitored' by the Permittee as
specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow, MGD Daily Estimate Effluent
pH 6.0 to 9.0 S.U. Monthly Grab Effluent
TSS 30.0 mg/L 50.0 mg/L Monthly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Monthly Grab Effluent
Total Dissolved Solids, Monthly Grab Effluent
mg/L
Chlorides. mg/L Monthly Grab Effluent
Sulfates, mg/L Monthly Grab Effluent
Total Hardness. mg/L as Monthly Grab Effluent
CaCO3
Total Arsenic, pg/I. Monthly Grab Effluent
Total Selenium, pg/L Monthly Grab Effluent
Total Copper. pig/L Monthly Grab Effluent.
Total Lead. pg/L Monthly Grab Effluent
Total Nickel, pg/L Monthly Grab Effluent
Total Mercury'- 47 ng/L (annual average Monthly Grab Effluent
limit)
Total Thallium, lag/l, Monthly Grab Effluent
Total Zinc, pg/L Monthly Grab Effluent
Acute Toxicity3 Monthly Grab Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (27.).
2. The facility shall use EPA method 1631E.
3. Acute Toxicity (Fathead Minnow 24-hr): LC50: see Special Condition A. (13.).
a. When the coal ash beneficiation discharge and treatment commences from the coal ash
beneficiation facility, Duke Energy shall sample and submit a completed EPA Form 2C for
Outfall 004 as soon as practicable, but no later than 180 days from the commencement of
the discharge through Outfall 004.
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 15 430

A
Permit NC0003417
A. (8.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Inactive
Ash Pond Dewatering - Outfall 005a) [ 15A NCAC 02B .0400 et seq., 02B .0500 et
seq.)
During the period beginning on the commencement date of the dewatering operation and lasting
until completion of dewatering or expiration, the Permittee is authorized to discharge treated
effluent from Outfall 005a (inactive ash pond dewatering). Such discharges shall be limited and
monitored' by the permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location2
Flow 1.0 MGD Weekly Pump Logs Effluent
pH3 6.0 <_ pH <_9.0 Weekly Grab Effluent
Total Suspended Solids" 30.0 mg/L 100.0 mg/L Weekly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Grab Effluent
Total Nitrogen (TN), mg/L Monthly Calculated Effluent
TN= (NO2 + NO3) +TKN
TN Load' Monitor & Report (lbs/month) Monthly Calculated Effluent
Monitor& Report (lbs/year) Annually Calculated
Total Phosphorus, mg/L Monthly Grab Effluent
Chronic Toxicity6 Monthly Grab Effluent
Turbidity NTU Weekly Grab Effluent
Total Hardness, mg/L Weekly Grab Effluent
(CaCO3)
Total Arsenic, pg/L Weekly Grab Effluent
Total Mercurys 47.0 ng/L Weekly Grab Effluent
Total Selenium, pg/L Weekly Grab Effluent
Nitrate/nitrite as N. mg/L Weekly Grab Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (27.).
2. Effluent sampling shall be conducted at the discharge from the ash settling pond prior to
mixing with any other waste stream.
3. The facility shall continuously monitor pH when the dewatering process commences and the
dewatering pump shall be shutoff automatically when 15 minutes running average pH falls below
6.1 standard units or rises above 8.9 standard units. Pumping will be allowed to continue after the
pH issue has been resolved or if interruption might result in a dam failure or damage.
4. The facility shall continuously monitor TSS concentration when the dewatering process
commences, and the dewatering pump shall be shutoff automatically when one half of the Daily
Maximum limit (15 minutes average) is exceeded. Pumping will be allowed to continue after the
TSS issue has been resolved or if interruption might result in a dam failure or damage. Continuous
TSS monitoring is only required when the pumps are employed.
5. See Special Condition A. (14.)Total Nitrogen Calculations
6. Chronic Toxicity (Ceriodaphnia) at 1.0%: Monthly: see Special Condition A. (11.).
7. The discharge from this facility shall not cause turbidity in the receiving stream to exceed 50 NTU.
If the instream turbidity exceeds 50 NTU due to natural background conditions, the discharge
cannot cause turbidity to increase in the receiving stream. Therefore, if the effluent measurement
exceeds 50 NTU, the Permittee shall sample upstream and downstream turbidity in the receiving
waterbody, within 24 hours, to demonstrate the existing turbidity level in the receiving waterbody
was not increased.All data shall be reported on the DMRs. (See 15A NCAC 2B .0211 (21)). NTU -
Nephelometric Turbidity Unit
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Permit NC0003417
8. The facility shall use EPA method 1631 E. This limit is an annual average limit based on a calendar
year.
a. The rate for lowering the liquid level in a coal ash pond shall not exceed one (1) foot per day
unless a higher rate is supported to the satisfaction of DEMLR and in accordance with
NCAC, Title 15A, Subchapter 2K.
b. The facility shall use a floating pump station with free water skimmed from the basin
surface using an adjustable weir.
c. When the facility commences the ash pond/ponds decanting/dewatering, the facility shall
treat the wastewater discharged from the ash pond using physical-chemical treatment, if
necessary, to assure state Water Quality Standards are not contravened in the receiving
stream. Duke Energy shall notify DWR NPDES Permitting and DWR Washington Regional
Office, in writing, within seven calendar days of installing additional physical-chemical
treatment at this Outfall.
d. If any one of these pollutants (As, Se, and Hg) reaches 85% of the allowable levels during
decanting/dewatering, the facility shall immediately discontinue discharge from the
decanting/dewatering operations and report the event to the Washington Regional Office
and Complex NPDES Permitting Branch via telephone and e-mail.
e. When pond dewatering has finished and the discharge primarily consists of treated
groundwater extraction and remediation wastewater, Duke Energy shall sample and submit
a completed EPA Form 2C for Outfall 001 as soon as practicable, but no later than 180 days
from the commencement of groundwater remediation discharges through Outfall 001.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
There shall be no discharge of polychlorinated biphenvls (PCBs).
This facility is currently classified as "non-nutrient bearing".
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Permit NC0003417
A. (9.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Inactive
Ash Pond Dewatering - Outfall 005b) 115A NCAC 02B .0400 et seq., 02B .0500 et
seq.]
During the period beginning on the commencement date of the dewatering operation and lasting
until completion of dewatering or expiration, the Permittee is authorized to discharge treated
effluent from Outfall 005b (inactive ash pond dewatering). Such discharges shall be limited and
monitored' by the permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow 1.0 MGD Weekly Pump Logs Effluent
pH3 6.0 <_pH 5. 9.0 Weekly Grab Effluent
Total Suspended Solids.' 30.0 mg/L 100.0 mg/L Weekly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Grab Effluent
Total Nitrogen (TN), mg/L Monthly Calculated Effluent
TN = (NO2 + NO3) +TKN
TN Load Monitor & Report (lbs/month) Monthly Calculated Effluent
Monitor & Report (lbs/year) Annually Calculated
Total Phosphorus, mg/L Monthly Grab Effluent
Chronic Toxicity6 Monthly Grab Effluent
Turbidity7, NTU Weekly Grab Effluent
Total Hardness. mg/L Weekly Grab Effluent
(CaCO3)
Total Arsenic. pg/L Weekly Grab Effluent
Total Mercury" 47.0 ng/L Weekly Grab Effluent
Total Selenium. pg/L Weekly Grab Effluent
Nitrate/nitrite as N. mg/L Weekly Grab Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (27.).
2. Effluent sampling shall be conducted at the discharge from the ash settling pond prior to
mixing with any other waste stream.
3. The facility shall continuously monitor pH when the dewatering process commences and the
dewatering pump shall be shutoff automatically when 15 minutes running average pH falls below
6.1 standard units or rises above 8.9 standard units. Pumping will be allowed to continue after the
pH issue has been resolved or if interruption might result in a darn failure or damage.
4. The facility shall continuously monitor TSS concentration when the dewatering process
commences, and the dewatering pump shall be shutoff automatically when one half of the Daily
Maximum limit (15 minutes average) is exceeded. Pumping will be allowed to continue after the
TSS issue has been resolved or if interruption might result in a dam failure or damage. Continuous
TSS monitoring is only required when the pumps are employed.
5. See Special Condition A. (12,)Total Nitrogen Calculations.
6. Chronic Toxicity (Ceriodaphnia) at 1.0%: Monthly: see Special Condition A. (11.).
7. The discharge from this facility shall not cause turbidity in the receiving stream to exceed 50 NTU.
If the instream turbidity exceeds 50 NTU due to natural background conditions, the discharge
cannot cause turbidity to increase in the receiving stream. Therefore, if the effluent measurement
exceeds 50 NTU, the Permittee shall sample upstream and downstream turbidity in the receiving
waterbody, within 24 hours, to demonstrate the existing turbidity level in the receiving waterbody
was not increased. All data shall be reported on the DMRs. (See 15A NCAC 2B .0211 (21)). NTU -
Nephelometric Turbidity Unit
Page 18 of 30

Permit NC0003417
9. The facility shall use EPA method 1631 E. This limit is an annual average limit based on a calendar
year.
a. The rate for lowering the liquid level in a coal ash pond shall not exceed one (1) foot per day
unless a higher rate is supported to the satisfaction of DEMLR and in accordance with
NCAC, Title 15A, Subchapter 2K.
b. The facility shall use a floating pump station with free water skimmed from the basin
surface using an adjustable weir.
c. When the facility commences the ash pond/ponds decanting/dewatering, the facility shall
treat the wastewater discharged from the ash pond using physical-chemical treatment, if
necessary, to assure state Water Quality Standards are not contravened in the receiving
stream. Duke Energy shall notify DWR NPDES Permitting and DWR Washington Regional
Office, in writing, within seven calendar days of installing additional physical-chemical
treatment at this Outfall.
d. If any one of these pollutants (As, Se, and Hg) reaches 85% of the allowable levels during
decanting/dewatering, the facility shall immediately discontinue discharge from the
decanting/dewatering operations and report the event to the Washington Regional Office
and Complex NPDES Permitting Branch via telephone and e-mail.
e. When pond dewatering has finished and the discharge primarily consists of treated
groundwater extraction and remediation wastewater, Duke Energy shall sample and submit
a completed EPA Form 2C for Outfall 001 as soon as practicable, but no later than 180 days
from the commencement of groundwater remediation discharges through Outfall 001.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
There shall be no discharge of polychlorinated biphenyls (PCBs).
This facility is currently classified as "non-nutrient bearing".
A. (10.) TOXICITY RE-OPENER CONDITION 115A NCAC 02B .0400 et seq., 02B .0500 et
seq.]
This permit shall be modified, or revoked and reissued, to incorporate additional toxicity limitations
and monitoring requirements in the event that toxicity testing or other studies conducted on the
effluent or receiving stream indicate that detrimental effects may be expected in the receiving stream
as a result of this discharge.
A. (11.) CHRONIC TOXICITY LIMIT (Monthly - Outfall 001, Outfall 005a, and
Outfall 005b) 115A NCAC 0213 .0400 et seq.. 0213 .0500 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 1.3%(Phase I and II)/1.0% (Phase Ill
and Outfalls 005a and 005b).
The permit holder shall perform at a minimum, monthly monitoring using test procedures outlined in
the"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure." Revised December 2010, or
subsequent versions or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised- December 2010) or subsequent versions. Effluent sampling for this testing must be obtained
Page 19 of 30

Permit NC0003417
during representative effluent discharge and shall be performed at the NPDES permitted final effluent
discharge below all treatment processes.
If the test procedure performed as the first test of any month results in a failure or ChV below
the permit limit, then multiple-concentration testing shall be performed at a minimum, in each
of the two following months as described in "North Carolina Phase II Chronic Whole Effluent
Toxicity Test Procedure" (Revised-December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered electronically using
the Division's eDMR system for the months in which tests were performed, using the parameter code
TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3
(original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Or, results can be sent to the email, [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. 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) test
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 Water Sciences Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,
monitoring will be required during the following month. Assessment of toxicity compliance is based on
the toxicity testing month.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Water Resources 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, minimum control organism reproduction, 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.
A. (12.) ACUTE TOXICITY MONITORING - Outfalls 002, 002A, and 003
(15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
The permittee shall conduct FIVE acute toxicity tests using protocols defined as definitive in EPA
Document EPA/600/4-90/027 entitled "Methods for Measuring the Acute Toxicity of Effluents to
Freshwater and Marine Organisms."The monitoring shall be performed as a Fathead Minnow
(Pimephales promelas) 24 hour static test. Effluent samples for self-monitoring purposes must be
obtained below all waste treatment. For each Outfall, sampling and subsequent testing will occur
during the first five discrete discharge events after the effective day of this permit. After monitoring of
the first five toxicity tests, the perniittee will conduct one test annually, with the annual period
Page 20 of 30

Permit NC000341 7
beginning in January of the next calendar year. The annual test requirement must be performed and
reported by June 30. If no discharge occurs by June 30, verbal notification shall be made to the
Division within two weeks of this date by contacting the Aquatic Toxicology Unit at 919-743-8401.
Verbal notification shall be followed by the Aquatic Toxicity Test Form indicating "No Discharge
through June 30th" within 30 days following the reporting period. Toxicity testing shall 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 electronically using the Division's eDMR system for the month in which it was
performed, using the appropriate parameter code. Additionally, DWR Form AT-1 (original) is to be sent
to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Or, results can be sent to the email, [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section 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 any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Water Resources 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.
A. (13.) ACUTE TOXICITY MONITORING - Outfall 004 (15A NCAC 02B .0400 et seq.,
02B .0500 et seq.)
The permittee shall conduct acute toxicity tests on a monthlq basis using protocols defined as
definitive in EPA Document EPA-821-R-02-012 entitled "Methods for Measuring the Acute Toxicity of
Effluents and Receiving Waters to Freshwater and Marine Organisms."The monitoring shall be
performed as a Fathead Minnow (Pimephales promelas) 48-hour static test. Effluent samples for self-
monitoring purposes must be obtained during representative effluent discharge and shall be performed
at the NPDES permitted final effluent discharge below all waste treatment processes.
The parameter code for Pimephales promelas is TAA6C. All toxicity testing results required as part of
this permit condition will be entered electronically using the Division's eDMR system for the month in
which it was performed, using the appropriate parameter code. Additionally, DWR Form AT-1 (original)
is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Or, results can be sent to the email, [e-mail].
Page 21 of 30

I ,
Permit NC0003417
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section 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 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"No Flow"
in the comment area of the form. The report shall be submitted to the Water Sciences Section at the
address cited 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 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.
A. (14.) CALCULATION OF TOTAL NITROGEN LOADS - Outfall 001 (Ash Pond)
(G.S. 143-215.1(b))
a. The Permittee shall calculate monthly and annual TN Loads as follows:
i. Monthly TN Load (lb/mo) =TN x TMF x 8.34
where:
TN = the average Total Nitrogen concentration (mg/L) of the samples
collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the
month (MG/mo)
8.34 = conversion factor, from (mg/L x MG) to pounds
ii. Annual TN Load (lb/yr) = Sum of the 12 Monthly TN Loads for the calendar year
b. The Permittee shall report monthly Total Nitrogen results (mg/L and lb/mo) in the discharge
monitoring report for that month and shall report each year's annual results (lb/yr) in the
December report for that year.
A. (15.) ANNUAL LIMITS FOR TOTAL NITROGEN (G.S. 143-215.1(b))
a. Total Nitrogen (TN) allocations and TN Load limits for NPDES dischargers in the Neuse River
basin apply on a calendar year basis.
b. For any given calendar year, the Permittee shall be in compliance with the annual TN Load limit
in this Permit if:
i. the Permittee's annual TN discharge is less than or equal to its TN Load limit, or
ii. the Permittee is a co-permittee member of a compliance association.
c. If the Permittee is not a co-permittee member of a compliance association and the Permittee's
cumulative annual TN discharge exceeds the effective TN Load limit in this permit at any point
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Permit NC000341 7
during the calendar year, the Permittee is in violation of its TN Load limit, and each day of a
continuing violation shall constitute a separate violation.
d. The TN Load limit in this Permit (if any) may be modified as the result of allowable changes in the
Permittee's TN allocation.
i. Allowable changes include those resulting from purchase of TN allocation from the
Wetlands Restoration Fund; purchase. sale, trade, or lease of allocation between the
Permittee and other dischargers; regionalization; and other transactions approved by the
Division.
ii. The Permittee may request a modification of the TN Load limit in this Permit to reflect
allowable changes in its TN allocation. Upon receipt of timely and proper application, the
Division will modify the permit as appropriate and in accordance with state and federal
program requirements.
iii. Changes in TN limits become effective on January 1 of the year following permit
modification. The Division must receive application no later than August 31 for changes
proposed for the following calendar year.
iv. Application shall be sent to:
NCDWR / NPDES Programs
Attn: Neuse River Basin Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
e. If the Permittee is a member and co-permittee of an approved compliance association, its TN
discharge during that year is governed by that association's group NPDES permit and the TN
limits therein.
i. The Permittee shall be considered a Co-Permittee Member for any given calendar year in
which it is identified as such in Appendix A of the association's group NPDES permit.
U. Association roster(s) and members'TN allocations will be updated annually and in
accordance with state and federal program requirements.
iii. If the Permittee intends to join or leave a compliance association. the Division must be
notified of the proposed action in accordance with the procedures defined in the
association's NPDES permit.
(A) Upon receipt of timely and proper notification, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Membership changes in a compliance association become effective on January 1 of
the year following modification of the association's permit.
f. The TN monitoring and reporting requirements in this Permit remain in effect until expiration of
this Permit and are not affected by the Permittee's membership in a compliance association.
A. (16.) TOTAL NITROGEN ALLOCATIONS [G.S. 143-215.1(b)]
a. The following table lists the Total Nitrogen (TN) allocation(s) assigned to, acquired by, or
transferred to the Permittee in accordance with the Neuse River nutrient management rule (T15A
NCAC 02B .0234) and the status of each as of permit issuance. For compliance purposes, this
table does not supersede any TN limit(s) established elsewhere in this permit or in the NPDES
permit of a compliance association of which the Permittee is a Co-Permittee Member.
ALLOCATION AMOUNT 1 I
ALLOCATION SOURCE DATE STATUS
TYPE Estuary Discharge
(ib/yr) (Ib/yr
NA See Footnote 2. - - - -
TOTAL - -Footnote:
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Permit NC000341 7
1. Transport Factor = 70%
2. Duke Energy Progress' N.F. Lee Energy Complex received no TN allocation under the Neuse rule but is
allowed a baseline TN load of 3,260 lb/yr at its Outfall 001 (2,282 lb/yr at the estuary),which is not part of the
point source waste load allocation.
b. Any addition, deletion. or modification of the listed allocations (other than typographical errors)
or any change to Active status of any of the listed allocations shall be considered a major
modification of this permit and shall be subject to the public review process afforded such
modifications under state and federal rules.
A. (17.) ADDITIONAL CONDITIONS AND DEFINITIONS [G.S. 143-215.3(a)(2) & 143-
215.66)
The following special conditions are applicable to all outfalls regulated by this permit:
a) There shall be no discharge of polychlorinated biphenyl compounds such as those once
commonly used for transformer fluid.
b) Nothing contained in this permit shall be construed as a waiver by the permittee of any right to
a hearing it may have pursuant to State or Federal laws or regulations.
c) Discharge of any waste resulting from the combustion of toxic or hazardous waste to any waste
stream which ultimately discharges to waters of the United States is prohibited, unless
specifically authorized in this permit.
d) The permittee shall report all visible discharges of floating materials (such as an oil slick) to the
Director when submitting DMRs.
e) "Upset." means an exceptional incident in which there is an unintentional and temporary non-
compliance with technology-based effluent limitations because of factors beyond the reasonable
control of the permittee. An upset does not include noncompliance to the extent cause by
operational error, improperly designed treatment facilities, inadequate treatment facilities, lack
of preventative maintenance, or improper operations.
f) All flows shall be reported on monthly DMRs. Should no flow occur during a given month. the
words"no flow" should be clearly written on the front of the DMR.
g) EPA methods 200.7 or 200.8 (or the most current versions) shall be used for analyses of all
metals except for total mercury.
h) All effluent samples for all external outfalls shall be taken at the most accessible location after
the final treatment but prior to discharge to waters of the U.S. (40 CFR 122.41(j)).
i) The term low volume waste sources means wastewater from all sources except those for which
specific limitations are otherwise established in this part (40 CFR 423.11 (b)).
j) The term chemical metal cleaning waste means any wastewater resulting from cleaning any
metal process equipment with chemical compounds. including, but not limited to, boiler tube
cleaning (40 CFR 423.11 (c)).
k) The term metal cleaning waste means any wastewater resulting from cleaning (with or without
chemical cleaning compounds) any metal process equipment including, but not limited to,
boiler tube cleaning, boiler fireside cleaning, and air preheater cleaning (40 CFR 423.11 (d)).
1) For all outfalls where the flow measurement is to be "estimated" the estimate can be done by
using calibrated V-notch weir. stop-watch and graduated cylinder, or other method approved
by the Division.
A. (18.) BIOCIDE CONDITION (NCGS 143-215.1)
The permittee shall not use any biocides except those approved in conjunction with the permit
application or in accordance with this condition. The permittee shall notify the Director in writing not
later than ninety (90) days prior to instituting use of any additional biocide used in cooling systems
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Permit NC000341 7
which may be toxic to aquatic life other than those previously reported to the Division of Water
Resources. Such notification shall include completion of Biocide Worksheet Form 101 and a map
locating the discharge point and receiving stream. Completion of Biocide Worksheet Form 101 is not
necessary for those outfalls containing toxicity testing. Division approval is not necessary for the
introduction of new biocides into outfalls currently tested for whole effluent toxicity.
A. (19.) CLEAN WATER ACT SECTION 316(B) [40 CFR 125.95)
The permittee shall comply with the Cooling Water Intake Structure Rule per 40 CFR 125.95. Pursuit
to 40 CFR 125.98 the Director has determined that operating and maintaining the existing Closed-
cycle recirculating system meets the requirements for an interim BTA.
The permittee shall submit the following information as required in §122.21 (except 122.21 (r)(6)) by
July 31. 2022.
§122.21(r)(2) Source Water Physical Data
§/22.21(r)(3) Cooling Water Intake Structure Data
§122.21(r)(4) Source Water Baseline Biological Characterization Data
§/22.21(r)(5) Cooling Water System Data
§122.21(r)(6) Chosen Method(s) of Compliance with the Impingement Mortality Standard (the chosen
method will be defined after the site-specific BTA determination is made by the Director)
§122.21(r)(7) Entrainment Performance Studies
§122.21(r)(8) Operational Status
Based on the Director's selection of entrainment, this permit may be reopened to establish a schedule
to implement the selected technology to comply with the Rule.
Copies of all the study plans. study results, and any other applicable materials should be submitted
to:
1. Electronic Version Only (PDF and CD)
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh. NC 2 7699-1 6 1 7
2. Electronic Version (PDF and CD) and Hard Copy
Division of Water Resources
Water Sciences Section
1623 Mail Service Center
Raleigh, NC 27699-1623
Nothing in this permit authorizes take for the purposes of a facility compliance with the Endangered
Species Act.
A. (20.) COMPLIANCE BOUNDARY (15A NCAC 02L.0107)
The compliance boundary for the disposal system shall be specified in accordance with 15A NCAC 02L
.0107(a) or (b) dependent upon the date permitted. An exceedance of groundwater standards at or
beyond the compliance boundary is subject to remediation action according to 15A NCAC 02L .0106(c),
(d), or (e) as well as enforcement actions in accordance with North Carolina General Statute 143-
215.6A through 143-215.6C. The compliance boundary map for this facility is incorporated herein and
attached hereto as Attachment A.
Page 25 of 30

Permit NC0003417
A. (21.) STRUCTURAL INTEGRITY INSPECTIONS OFASH POND DAM [15A NCAC
02K.0208)
The facility shall meet the dam design and darn safety requirements per 15A NCAC 2K.
A. (22.) ASH POND CLOSURE [NCGS 143-215.1(b))
The facility shall prepare an Ash Ponds Closure Plan. This Plan shall be submitted to the Division one
month prior to the closure of the ash ponds to the address listed below:
Electronic Version Only (PDF and CD)
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh. NC 27699-1617
A. (23.) INSTREAM MONITORING [15A NCAC 02B .0500 et seq.]
The facility shall conduct monthly instream monitoring (upstream of Outfall 002 - at the Ferry Bridge
Road. and downstream of Outfall 003 - at Stevens Mill Road bridge) for total arsenic, total selenium.
total mercury (method 1631E). total chromium, dissolved lead, dissolved cadmium, dissolved copper,
dissolved zinc, bromide, total hardness, and total dissolved solids (TDS). The monitoring results shall
be reported in the monthly DMRs and summarized with the NPDES permit renewal application.
Sampling periods and the samples collected shall be representative of the surface waters.
Instream monitoring by the permittee is provisionally waived considering the penmittee`s participation
in the Neuse River Basin Association provided the Association agrees to sample for all the parameters
listed in this condition and at the specified locations and frequencies. Instream monitoring shall be
conducted as stated in this permit should the permittee end its participation in the Association.
A. (24.) FISH TISSUE MONITORING NEAR ASH POND DISCHARGE (Outfall 001)
[NCGS 143-215.3 (a)(2)]
The facility shall conduct fish tissue monitoring annually and submit the results with the NPDES permit
renewal application. The objective of this monitoring is to evaluate potential uptake of pollutants by fish
tissue near the ash pond discharge. The parameters analyzed in fish tissue shall include arsenic.
selenium, and mercury. The monitoring shall be conducted in accordance with the sampling plan
approved by the Division.The plan should be submitted to the Division within 180 days from the effective
date of the permit. Upon approval, the plan becomes an enforceable part of the permit.
Copies of the plan and monitoring results shall be submitted to:
1) Electronic Version Only (PDF and CD)
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh. NC 27699-1 6 1 7
2) Electronic Version (PDF and CD) and Hard Copy
Division of Water Resources
WSS - Biological Assessment Branch
Page 26 of 30

Permit NC000341 7
1621 Mail Service Center
Raleigh, NC 27699-1 62 1
A. (25.) APPLICABLE STATE LAW(STATE ENFORCEABLE ONLY) [NCGS 143-215.1(b)]
This facility shall meet the requirements of Senate Bill 729 (Coal Ash Management Act). This permit
may be reopened to include new requirements imposed by Senate Bill 729.
A. (26.) CHEMICAL DISCHARGES [G.S. 143-215, 143-215.1]
Discharge of any product registered under the Federal Insecticide. Fungicide, and Rodenticide Act to
any waste stream which may ultimately be released to lakes, rivers, streams or other waters of the United
States is prohibited unless specifically authorized elsewhere in this permit. Discharge of chlorine from
the use of chlorine gas. sodium hypochlorite, or other similar chlorination compounds for disinfection
in plant potable and service water systems and in sewage treatment is authorized. Use of restricted use
pesticides for lake management purposes by applicators licensed by the N.C. Pesticide Board is allowed.
A. (27.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS [G.S.
143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
program reports. The final NPDES Electronic Reporting Rule was adopted and became effective on
December 21, 2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this
permit (Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) Internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the Internet. Until such time that the
state's eDMR application is compliant with EPA's Cross-Media Electronic Reporting Regulation
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed original and a copy of the computer printed eDMR to the
following address:
NC DENR / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1 6 1 7
Page 27 of 30

Permit NC000341 7
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the
facility being physically located in an area where less than 10 percent of the households have
broadband access, then a temporary waiver from the NPDES electronic reporting requirements
may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1.1,
2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be submitted to
the mailing address above. See "How to Request a Waiver from Electronic Reporting" section
below.
Regardless of the submission method, the first DMR is due on the last day of the month following
the issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
Starting on December 21. 2020, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports: and
• Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time
of each electronic submission. The permittee should use the EPA's website resources to identify
the initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated
entity for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at: http://www2.epa.gov/compliance/final-national-pollutant-
discharge-elimination-system-npdes-electronic-reporting-rule.
Electronic submissions must start by the dates listed in the "Reporting Requirements" section
above.
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to
the Division. Requests for temporary electronic reporting waivers must be submitted in wilting to
the Division for written approval at least sixty (60) days prior to the date the facility would be
required under this permit to begin submitting monitoring data and reports. The duration of a
temporary waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring
data and reports shall be submitted electronically to the Division unless the permittee re-applies
for and is granted a new temporary electronic reporting waiver by the Division. Approved
electronic reporting waivers are not transferrable. Only permittees with an approved reporting
waiver request may submit monitoring data and reports on paper to the Division for the period that
the approved reporting waiver request is effective.
Page 28 of 30

Permit NC000341 7
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
I ittp://deq.nc.gov/abou t/divisions/water-resources/ednu
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)j
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part
II, Section B. (11.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR
reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user
account and login credentials to access the eDMR system. For more information on North
Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit
the following web page:
htta://deq.nc.gov/about/divisions/water-resourcesiednir
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22J. NO OTHER STATEMENTS OF CERTIFICATION WILL
BE ACCEPTED:
"1 certify. under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the information,
the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I
am aware that there are significant penalties for submitting false information, including the
possibility of fines and imprisonment for knowing violations."
5. Records Retention [Supplements Section D. (6.)j
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR
submissions. These records or copies shall be maintained for a period of at least 3 years from the
date of the report. This period may be extended by request of the Director at any time [40 CFR
122.41J.
Page 29 of 30
J

Permit NC0003417
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Receiving Stream:Neuse River Stream Class: WS-IV
State Grid/USGS Quad:F26NE/NW Goldsboro Drainage Basin:Neuse River Basin
001:Latitude 35°22'16" Longitude 78°04'09" HUC: 03050105
002:Latitude 35°22'09" Longitude 78°05'06" Sub-Basin: 03-04-12 4"'` / �;
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002A:Latitude 35°22'18" Longitude 78°03'54"
003:Latitude 35°22'02" Longitude 78°04'60" Wayne County
004: Latitude 35°22'18" Longitude 78°06'04" Page 30 of 30

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Attachment A Compliance Boundary

Cooling Pond Seep Report
H.F. Lee Energy Complex—Duke Energy Progress, LLC
Goldsboro, North Carolina
APPENDIX C
MANN KENDALL TREND TEST ANALYSIS, FEBRUARY 2022
synTerra
Science & Engineering Consultants

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s y Te r ra Science & Engineering Consultants
synterracorp.com
APPENDIX C
MANN-KENDALL TREND TEST ANALYSIS
H.F. LEE ENERGY COMPLEX
FEBRUARY 2022
PREPARED FOR
gresal DUKE
ENERGY
DUKE ENERGY PROGRESS,LLC

•
Appendix C-Mann-Kendall Trend Test Analysis
H.F. Lee Energy Complex-Duke Energy Progress, LLC
Goldsboro, North Carolina
TABLE OF CONTENTS
SECTION PAGE
1.0 THE MANN-KENDALL TREND TEST 1-1
2.0 TIME VERSUS CONCENTRATION PLOTS 2-1
3.0 MANN-KENDALL TREND TEST RESULTS 3-1
LIST OF FIGURES
Figure 1 Time versus Total Arsenic
Figure 2 Time versus Total Barium
Figure 3 Time versus Total Boron
Figure 4 Time versus Bromide
Figure 5 Time verses Total Cadmium
Figure 6 Time versus Chloride
Figure 7 Time versus Total Chromium
Figure 8 Time versus Total Copper
Figure 9 Time versus Flow Rate
Figure 10 Time versus Fluoride
Figure 11 Time versus Hardness
Figure 12 Time versus Total Lead
Figure 13 Time versus Total Mercury
Figure 14 Time versus Total Nickel
Figure 15 Time versus Nitrate + Nitrite
Figure 16 Time versus Oil and Grease
Figure 17 Time versus pH
Figure 18 Time versus Total Selenium
Figure 19 Time versus Specific Conductance
Figure 20 Time versus Temperature
Figure 21 Time versus Total Thallium
Figure 22 Time versus Total Dissolved Solids
Figure 23 Time versus Total Sulfate
Figure 24 Time versus Total Suspended Solids
Figure 25 Time versus Total Zinc
LIST OF TABLES
Table 1 Sampling Locations and Constituents Included in Concentration
over Time Plots
Table 2 Results of Mann-Kendall Trend Test
February 2022 Page i

Appendix C-Mann-Kendall Trend Test Analysis
H.F. Lee Energy Complex-Duke Energy Progress, LLC
Goldsboro, North Carolina
1.0 THE MANN-KENDALL TREND TEST
The Mann-Kendall trend tests were performed on available seep data associated with the
cooling pond at the H.F. Lee Energy Complex. The Mann-Kendall trend test evaluates data over
time for monotonic trends, where monotonic indicates a trend that is solely increasing or
decreasing. Mann-Kendall is a useful trend test in that it is non-parametric and does not require
normal distribution of data.
To perform the Mann-Kendall trend test, data were processed as follows:
• Non-detects greater than regulatory values were removed. If a constituent does not
have a regulatory limit and there are multiple reporting limits, only the lowest reporting
limit was retained.
• Non-detects were treated as the reporting limit.
• Samples with turbidity greater than 50 nephelometric turbidity units were removed.
• Samples with pH greater than 10 standard units were removed.
Next, the data must meet the following requirements for a Mann-Kendall trend test to be
applicable:
• There must be at least four detect measurements.
• Non-detects must make up less than or equal to 50 percent of measurements.
In a Mann-Kendall trend test, each value is compared to the preceding values to calculate
whether the value has increased, decreased, or stayed the same over time. These comparisons
are recorded as simply 1 (increasing), -1 (decreasing), or 0 (stayed the same). These
comparisons give an S value, where S indicates the type of trend. A negative S value indicates a
decreasing trend, and a positive S value indicates an increasing trend. Whether or not these
trends are statistically significant is dependent on the two-sided p value. A p value ranges from
0 to 1 and indicates whether the results are due to chance or the results are statistically
significant. Greater p values indicate a trend is not statistically significant, and a p value less
than 0.1 indicates a statistically significant trend.
All Mann-Kendall trend tests were performed in the program RStudio using the "Kendall"
package.
February 2022 Page 1-1
Project:00.0061.20
L

Appendix C-Mann-Kendall Trend Test Analysis
H.F. Lee Energy Complex-Duke Energy Progress, LLC
Goldsboro, North Carolina
2.0 TIME VERSUS CONCENTRATION PLOTS
Plots of concentration over time provide a visual representation of possible trends in the data.
Time versus concentration plots are presented as Figures 1 through 25. Plots are grouped by
constituent, and within the figure, a plot of concentration over time is displayed for each
location that has data for that constituent. Locations and constituents included in these plots
are presented in Table 1.
Trends from the Mann-Kendall tests are displayed on plots with colored borders representing
trend conclusions. Blue indicates no trend was present, green indicates a decreasing trend, gold
indicates an increasing trend, and no color indicates the constituent-location pair cannot be
analyzed for trends due to a lack of detect measurements. Detect measurements are shown as
a black point, and non-detect measurements are shown as an open circle.
February 2022 Page 2-1
Project:00.0061.20

Appendix C-Mann-Kendall Trend Test Analysis
H.F. Lee Energy Complex-Duke Energy Progress, LLC
Goldsboro, North Carolina
TABLE 1
SAMPLING LOCATIONS AND CONSTITUENTS INCLUDED IN PLOTS OF CONCENTRATIONS OVER
TIME
Sampling Locations Constituents
CPS-01 Total Arsenic
CPS-02 Total Boron
CPS-03 Bromide
CPS-04 Total Cadmium
CPS-05 Chloride
CPS-06 Total Chromium
CPS-07 Total Copper
CPS-08 Flow Rate
CPS-09 Fluoride
CPS-10 Hardness
CPS-11 Total Lead
CPS-12 Total Mercury
CPS-13 Total Nickel
CPS-14 Nitrate+Nitrite
CPS-15 Oil and Grease
CPS-16 pH
CPS-17 Total Selenium
CPS-18 Specific Conductance
CPS-19 Temperature
CPS-20 Total Thallium
CPS-21 Total Dissolved Solids
Total Sulfate
Total Suspended Solids
Total Zinc
Note:
If a location-constituent pair does not have an associated trend or plot,data was not available for that pair.
February 2022 Page 2-2
Project:00.0061.20

Appendix C-Mann-Kendall Trend Test Analysis
H.F. Lee Energy Complex-Duke Energy Progress, LLC
Goldsboro, North Carolina
3.0 MANN-KENDALL TREND TEST RESULTS
Results of the Mann-Kendall trend tests are presented in Table 2. Mann-Kendall trend tests
were conducted for data pertaining to the 21 non-dispositioned seeps associated with the
cooling pond. Out of the 21 seeps evaluated, four had more than three samples and thus were
evaluated for trends. Trend analyses were completed for 78 location-constituent pairs using
available seep data that was collected between 2015 and 2021. For the other occurrences
where trend analysis could not be performed, either there are less than four detects, or the
number of non-detects is greater than the number of detects. The average percentage of non-
detects for all constituent-location pairs included in the Mann-Kendall trend test is 42 percent.
Locations not displayed in Table 2 are excluded due to having less than the minimum number
of samples required to run the "Kendall" package in RStudio. Location-constituent pairs with
less than four detects are included in Table 2 but cannot be analyzed for trends based on the
criteria in Section 1.0.
Out of the 78 constituent-location pairs that have trend conclusions, 20 are associated with
field parameters: pH, specific conductance, temperature, total dissolved solids, and total
suspended solids. Trends for these field parameters were evaluated for information but are not
included in percentages below. Of the chemical constituent-location pairs that have trend
conclusions, 41 percent of constituent concentrations are stable or have statistically significant
decreasing trends (24 out of 58 constituent-location pairs) and 59 percent cannot be analyzed
for trends due to greater than 50 percent non-detects (34 out of 58 constituent-location pairs).
Of the 58 chemical constituent-location pairs, no statistically significant increasing trends were
identified.
Overall, the results of the Mann-Kendall trend tests indicate a system that is geochemically
stable, with the majority of concentrations of constituents remaining stable over time.
February 2022 Page 3-1
P rol r t:OO.0061 20

r
TABLE 2
MANN—KENDALL TREND ANALYSIS RESULTS
COOLING POND SEEP REPORT—APPENDIX C
H.F.LEE ENERGY COMPLEX
DUKE ENERGY PROGRESS,LLC,GOLDSBORO,NC
Well ID Analyte Number of Samples Non-Detects Detects Percent Non-Detects Is Trend Analysis Two-Sided P Value S Value Trend Conclusion
Applicable?
CPS-09 pH 5 0 5 0 Yes 2.21E-01 - Stable,no significant trend
CPS-15 pH 4 0 4 0 Yes 1.00E+00 - Stable,no significant trend
CPS-1B pH 4 0 4 0 Yes 1A9E-01 - Stable,no significant trend
CPS-21 pH 4 0 4 0 Yes 4.70E-01 - Stable,no significant trend
CPS-09 Temperature 5 0 5 0 Yes 8.06E-01 - Stable,no significant trend
CPS-15 Temperature 4 0 4 0 Yes 1.49E-01 - Stable,no significant trend
CP5-18 Temperature 4 0 4 0 Yes 7.34E-01 - Stable,no significant trend
CPS-21 Temperature 4 0 4 0 Yes 7.34E-01 - Stable,no significant trend
CPS-09 Specific Conductance 5 0 5 0 Yes 4.62E-01 - Stable,no significant trend
CPS-15 Specific Conductance 4 0 4 0 Yes 3.08E-01 - Stable,no significant trend
CPS-18 Specific Conductance 4 0 4 0 Yes 8.94E-02 6 Statistically significant increasingtrend
CPS-21 Specific Conductance 4 0 4 0 Yes 3.08E-01 - Stable,no significant trend
CPS-09 Total Suspended Solids 5 0 5 0 Yes 4.62E-01 - Stable,no significant trend
CPS-IS Total Suspended Solids 4 0 4 0 Yes 7.34E-01 - Stable,no significant trend
CPS-18 Total Suspended Solids 4 0 4 0 Yes 7.34E-01 - Stable,no significant trend
CPS-21 Total Suspended Solids 4 0 4 0 Yes 4.70E-01 - Stable,no significant trend
CPS-09 Boron 5 0 5 0 Yes 8.64E-02 -8 Statistically significant decreasing trend
CPS-15 Boron 4 0 4 0 Yes 1.00E+00 - Stable,no significant trend
CPS-18 Boron 4 0 4 0 Yes 3.08E-01 - Stable,no significant trend
CPS-21 Boron 4 0 4 0 Yes 7.34E-01 - Stable,no significant trend
CPS-09 Chloride 5 0 5 0 Yes 1.00E+00 - Stable,no significant trend
CPS-15 Chloride 4 0 4 0 Yes 3.08E-01 - Stable,no significant trend
CPS-18 Chloride 4 0 4 0 Yes 7.34E-01 - Stable,no significant trend
CPS-21 Chloride 4 0 4 0 Yes 1.00E+00 - Stable,no significant trend
CPS-09 Sulfate 5 5 0 100 No - - Cannot Analyze for Trends
CPS-15 Sulfate 4 0 4 0 Yes 8.94E-02 -6 Statistically significant decreasing trend
CPS-18 Sulfate 4 0 4 0 Yes 7.34E-01 - Stable,no significant trend
CPS-21 Sulfate 4 4 0 100 No - - Cannot Analyze for Trends
CPS-09 Total Dissolved Solids 5 0 5 0 Yes 1.00E+00 - Stable,no significant trend
CPS-15 Total Dissolved Solids 4 0 4 0 Yes 3.71E-01 - Stable,no significant trend
Paget of
J

TABLE 2
MANN-KENDALL TREND ANALYSIS RESULTS
COOLING POND SEEP REPORT-APPENDIX C
H.F.LEE ENERGY COMPLEX
DUKE ENERGY PROGRESS,LLC,GOLDSBORO,NC
Well ID Analyte Number of Samples Non-Detects Detects Percent Non-Detects Is Trend Analysis Two-Sided P Value 5 Value Trend Conclusion
Applicable?
CPS-18 Total Dissolved Solids 4 0 4 0 Yes 1.00E+00 - Stable,no significant trend
CPS-21 Total Dissolved Solids 4 0 4 0 Yes 1.00E+00 - Stable,no significant trend
1 CPS-09 Arsenic 5 0 5 0 Yes 2.21E-01 - Stable,no significant trend
CPS-18 Arsenic 4 0 4 0 Yes 8.94E-02 -6 Statistically significant decreasing trend
CPS-21 Arsenic 4 4 0 100 No - - Cannot Analyze for Trends
CPS-09 Barium 5 0 5 0 Yes 8.06E-01 - Stable,no significant trend
CPS-15 Barium 4 0 4 0 Yes 3.08E-01 - Stable,no significant trend
CPS-18 Barium 4 0 4 0 Yes 1.00E+00 - Stable,no significant trend
CPS-21 Barium 4 0 4 0 Yes 4.70E-01 - Stable,no significant trend
CPS-21 Cadmium 4 4 0 100 No - - Cannot Analyze for Trends
CPS-09 Chromium 5 5 0 100 No - Cannot Analyze for Trends
CPS-15 Chromium 4 4 0 100 No • - Cannot Analyze for Trends
CPS-18 Chromium 4 4 0 100 No • - Cannot Analyze for Trends
CPS-21 Chromium 4 4 0 100 No - - Cannot Analyze for Trends
CPS-09 Copper 5 5 0 100 No - - Cannot Analyze for Trends
CPS-15 Copper 4 4 0 100 No - - Cannot Analyze for Trends
I CPS-18 Copper 4 4 0 100 No - . Cannot Analyze for Trends
CPS-21 Copper 4 4 0 100 No - - Cannot Analyze for Trends
CPS-21 Lead 4 4 0 100 No - - Cannot Analyze for Trends
CPS-09 Nickel 5 5 0 100 No - • Cannot Analyze for Trends
CPS-15 Nickel 4 4 0 100 No - - Cannot Analyze for Trends
CPS-18 Nickel 4 9 0 100 No - - Cannot Analyze nor Trends
CPI-21 Nickel 4 4 0 100 No - - Cannot Analyze for Trends
CP5-21 Nitrate+Nitrite 4 2 2 50 No - - Cannot Analyze for Trends
CPS-09 Selenium 5 5 0 100 No - . Cannot Analyze for Trends
CPS-15 Selenium 4 4 0 100 No - • Cannot Analyze for Trends
CPS-18 Selenium 4 4 0 100 No - - Cannot Analyze for Trends
CPS-21 Selenium 4 4 0 100 No - - Cannot Analyze for Trends
CPS-09 Thallium 5 5 0 100 No - - Cannot Analyze for Trends
CPS-15 Thallium 4 4 0 100 No - - Cannot Analyze for Trends

TABLE 2
MANN-KENDALL TREND ANALYSIS RESULTS
COOLING POND SEEP REPORT-APPENDIX C
H.F.LEE ENERGY COMPLEX
•
DUKE ENERGY PROGRESS,LLC,GOLDSBORO,NC
l
Wall ID Analyse Number of Samples Non-Detects Detects Percent Non-Detects Is TApplrendic Analyable.sis Two-Sided P Value S Value Trend Conclusion
CPS-18 Thallium 4 4 0 100 No - - Cannot Analyze for Trends
CPS-21 Thallium 4 4 0 100 No - - Cannot Analyze for Trends
CP5-09 Zinc 5 5 0 100 No - - Cannot Analyze for Trends
CP5-15 Zinc 4 2 50 No - - Cannot Analyze for Trends
CP5-18 Zinc 4 4 0 100 No - - Cannot Analyze for Trends
CPS-21 Zinc 4 4 0 100 No - - Cannot Analyze for Trends
CPS-09 Fluoride 5 0 5 0 Yes 6.13E-01 - Stable,no significant trend
CPS-15 Fluoride 4 0 4 0 Yes 1.00E+00 - Stable,no significant trend
CPS-18 Fluoride 4 0 4 0 Yes 1.49E-01 - Stable,no significant trend
CPS-21 Fluoride 4 0 4 0 Yes 1.00E+00 - Stable,no significant trend
CPS-09 Hardness 5 0 5 0 Yes 1.00E+00 - Stable,no significant trend
CPS-15 Hardness 4 0 4 0 Yes 7.34E-01 - Stable,no significant trend
CP5-18 Hardness 4 0 4 0 Yes 7.34E-01 - Stable,no significant trend
CPS-21 Hardness 4 0 4 0 Yes 8.94E-02 -6 Statistically significant decreasing trend
CPS-09 Oil and grease 5 5 0 100 No - - Cannot Analyze for Trends
CPS-15 Oil and grease 4 4 0 100 No - - Cannot Analyze for Trends
CP5-18 Oil and grease 4 4 0 100 No - - Cannot Analyze for Trends
CPS-21 Oil and grease 4 4 0 100 No - - Cannot Analyze for Trends
Notes: Prepared by:na Checked by:PNi
Detection limits were adjusted in accordance with OSHA guidelines.
To be analyred b trends Mere must beat least A detects and less Manor equal to 50%non.detects.
A P value less Man 0.1 Indicates a statistically significant trend.
A negative S value indicates a decreasing trend.
A positive S values indicates an increasing trend.
Page 3 of 3

Appendix C-Mann-Kendall Trend Test Analysis
H.F. Lee Energy Complex-Duke Energy Progress, LLC
Goldsboro, North Carolina
FIGURES
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