NC0003417_Draft Permit_20241210

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Governor 1 '
ELIZABETH S.BISER 44.4.4.
Secretary
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
December 10,2024
Ms.Jessica Bednarcik,Senior Vice President
Environmental,Health and Safety
Duke Energy Carolinas,LLC
Mail Code EC13K
P.O.Box 1006
Charlotte,North Carolina 28201-1006
Subject: Draft NPDES Permit
Permit NC0003417
H.F.Lee energy Complex
Wayne County
Facility Class I
Dear Ms.Bednarcik:
Enclosed with this letter is a copy of the Draft Permit for your facility. Please review the draft very carefully
to ensure thorough understanding of the conditions and requirements it contains.
The Draft Permit contains the following significant changes from your current permit:
• The Effluent Page for the Decanting phase(Outfall 002)was removed from the permit since the facility
transitioned to the Dewatering phase on 07/16/2019.
• The monitoring for Total Cadmium,Total Chromium,Total Copper,Total Lead,Total Mercury,
Total Zinc has been eliminated from Outfall 001/Phase II based on the results of the Reasonable
Potential Analysis.
• The limit for Total Arsenic has been eliminated from Outfall 001/Phase II based on the results of
the Reasonable Potential Analysis.
• The monitoring for Total Dissolved Solids (IDS)has been eliminated from Outfall 001/Phase II
based on the results of the Data Review.
• The monitoring for Total Hardness,Total Arsenic,Total Selenium,and Nitrate/Nitrite has been
reduced to Monthly from Outfall 001/Phase II based on the results of the Data Review.
• The Chronic Toxicity sampling frequency has been reduced from Monthly to Quarterly(Outfall
001/Phase III)based on the review of the compliance history and to be consistent with other Duke
permits.
• The limits for Total Selenium and Total Mercury have been removed from the permit based on the
results of the Reasonable Potential Analysis (Outfall 005a and Outfall 005b).
• The monitoring for Total Thallium has been removed from the permit based on the results of the
Reasonable Potential Analysis (Outfall 005a and Outfall 005b).
• The Clean Water Act Section 316(b) Special Condition has been updated based on the results of the
Division's review of 316(b)-documentation submitted by Duke.
• The Fish tissue monitoring frequency has been reduced to once per permit cycle(5 years)from annually
based on the review of the fish tissue data.
DENorth Carolina Department of Environmental Quality I Division of Water Resources
�.� 512 North Salisbury Street 11611 Mail Service Center I Raleigh,North Carolina 27699-1611
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• The Instream monitoring frequency has been reduced from Monthly to Quarterly based on the review
of the sampling results.
• The Ash Pond Closure Special Condition has been removed from the permit since the Ash Pond
Closure Plan has been submitted to the Division.
• Outfall 004 was removed from the permit because the facility requested this removal and all the
wastewater generated during the ash beneficiation will be recycled.
The Division is unable to change the Chronic Toxicity sampling to Quarterly for Dewatering Phase (Outfall
001,Outfall 005a,and Outfall 005b)because it would violate the Division's Policy on the ash pond dewatering.
Please provide any comments you have regarding the draft permit to this office by January 16,2025.
At this time,the Division is also publishing a notice in the newspapers of general circulation in Wayne
County,inviting public comment on the draft permit. Following the 30-day comment period,we will review
all pertinent comments received and take appropriate action on the permit renewal.
The NPDES Standard Conditions (Parts II,III,and IV)are not included with this draft. They can be found
at the following link if you would like to review them in conjunction with this draft permit.
https://bit.ly/2BZ4c
If you have any questions about the NPDES permit process,please contact me at the following e-mail
address: sergei.chernikov(a,deq.nc.gov,or telephone number: 919-707-3606.
Sincerely,
i
Sergei Chernikov,Ph.D.
Environmental Engineer III
Industrial NPDES Permitting Unit
cc: NPDES Files
EPA Region IV(e-copy)
Washington Regional Office/Surface Water Protection (e-copy)
Washington Regional Office/Public Water Supply(e-copy)
Aquatic Toxicology Unit(e-copy)
TACU (e-copy)
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Permit NC0003417
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
DRAFT 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 permit shall become effective
This permit and the authorization to discharge shall expire at midnight on
Signed this day
Douglas Dowden
Environmental Program Supervisor II
Industrial Permitting Unit
By Authority of the Environmental Management Commission
Page 1 of 28

Permit NC0003417
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under
the permit conditions, requirements, terms, and provisions included herein.
Duke Energy Progress, LLC.
is hereby authorized to:
1. Continue to discharge the following treated waste streams 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 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 Storm water 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.
• Outfall 005a (Latitude 35° 22' 40.40"; Longitude 78° 6' 7.64") - Inactive ash basin 1
and 2, including storm water runoff, groundwater, and interstitial water. Flow limit 8
MGD (combined for Outfall 005a and 005b).
Page 2 of 28

Permit NC0003417
• Outfall 005b (Latitude 35° 22' 21.94"; Longitude 78° 6' 11.65") - Inactive ash basin 3,
including storm water runoff, groundwater, and interstitial water. Flow limit 8 MGD
(combined for Outfall 005a and 005b).
• Outfall 006 - Inactive ash basin 1 and 2 emergency spillway, including stormwater
runoff, groundwater, and interstitial water. No Flow Limit.
• Outfall 007 - Inactive ash basin 3 emergency spillway, including stormwater runoff,
groundwater, and interstitial water. No Flow Limit.
• Outfall 008 - Inactive ash basin 3 emergency spillway, including stormwater runoff,
groundwater, and interstitial water. No Flow Limit.
• Outfall 009 - Inactive ash basin 1 and 2 emergency spillway, including stormwater
runoff, groundwater, and interstitial water. No Flow Limit.
• Discharge from 21 seeps around the cooling pond (no monitoring required).
2. Discharge from said treatment works via Outfalls 001, Outfalls 002 and 002A, Outfall
004, Outfall 005a, Outfall 005b, Outfall 006, Outfall 007, Outfall 008, Outfall 009,
and 21 seeps into the Neuse River, a Class WS-IV; NSW water in the Neuse River
Basin, at the locations specified on the attached maps.
Page 3 of 28

Permit NC0003417
Part I
A. (1.) 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
(TKN), mg/L Monthly Grab Effluent
Total Nitrogen (TN), mg/L Monthly Calculated Effluent
TN = (NO2 + NO3) + TKN
TN Loads Monitor 86 Report (lbs/month) Monthly Calculated Effluent
Monitor 86 Report (lbs/year) Annually Calculated
Total Phosphorus, mg/L Monthly Grab Effluent
Chronic Toxicity6 Monthly Grab Effluent
Turbidity7, NTU Monthly Grab Effluent
Total Hardness, mg/L Monthly Grab Effluent
[CaCO3]
Total Arsenic, µg/L Monthly Grab Effluent
Total Selenium, µg/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 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. (15.) Total Nitrogen Calculations
6. Chronic Toxicity (Ceriodaphnia dubia) at 1.3%; Monthly; see Special Condition A. (13.).
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
Page 4 of 28

Permit NC0003417
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
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. If any one of these pollutants (As and Se) 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.
There shall be no discharge of polychlorinated biphenyls (PCBs).
Page 5 of 28

Permit NC0003417
A. (2.) 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 Location
Flow 1.8 MGD Weekly Pump Logs Effluent
pH 6.0 < pH <_ 9.0 2/ Month Grab Effluent
Total Kjeldahl Nitrogen
(TKN), mg/L Monthly Composite Effluent
Total Nitrogen (TN), mg/L
TN = (NO2 + NO3) + TKN Monthly Calculated Effluent
TN Load3 Monitor & Report (lbs/month) Monthly Calculated Effluent
Monitor & Report (lbs/year) Annually Calculated
Total Phosphorus, mg/L Monthly Composite Effluent
Chronic Toxicity4 Quarterly Composite Effluent
Turbidity5, NTU Monthly Grab Effluent
Total Hardness, mg/L Monthly Composite Effluent
[CaCO3]
Total Arsenic, µg/L Weekly Composite Effluent
Total Cadmium, µg/L Monthly Composite Effluent
Total Copper, pg/L Monthly Composite Effluent
Total Lead, µg/L Weekly Composite Effluent
Total Mercury6, ng/L Monthly Grab Effluent
Total Barium, mg/L Monthly Composite Effluent
Total Selenium, µg/L Weekly Composite Effluent
Nitrate/nitrite as N, mg/L Monthly Composite 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 Wastewater Treatment System
prior to mixing with any other waste stream.
3. See Special Condition A. (15.) Total Nitrogen Calculations
4. Chronic Toxicity (Ceriodaphnia dubia) at 1.0 %; Quarterly; see Special Condition A. (12.).
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 6 of 28

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.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 7 of 28

Permit NC0003417
A. (3.) 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,
and equipment wash waters). 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, 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 <_ 9.0 Each Event Grab Outfall Structure
Total Residual Chlorine4 28.0 µg/L Each Event Grab Outfall Structure
Free Available Chlorine4 200 µg/L 500 µg/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 µg/L, Each Event Grab Outfall Structure
Total Chromium 200 µg/L 200 µg/L Each Event Grab Outfall Structure
Total Zinc 1000 µg/L 1000 µg/L Each Event Grab Outfall Structure
Total Lead, µg/L Each Event Grab Outfall Structure
Total Mercury5, ng/L Each Event Grab Outfall Structure
Total Molybdenum, µg/L lµg/L4 13,734 µg/L Each Event Grab Outfall Structure
Acute Episodic Toxicity6 See A. (15.) 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.).
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
Page 8 of 28

Permit NC0003417
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 µg/L is a daily
maximum limitation and is to be measured during the chlorine release period. The 200 µg/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. (14.).
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. (19.).
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 9 of 28

Permit NC0003417
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Cooling
Pond - Outfall 002A) [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:
LIMITS MONITORING REQUIREMENTS
EFFLUENT
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/L Each Event Grab Outfall Structure
pH 6.0 <_ pH <_ 9.0 Each Event Grab Outfall Structure
Total Residual Chlorine4 28.0 µg/L Each Event Grab Outfall Structure
Free Available Chlorine4 200 µg/L 500 µg/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 µg/L, Each Event Grab Outfall Structure
Total Chromium 200 µg/L 200 µg/L Each Event Grab Outfall Structure
Total Zinc 1000 µg/L 1000 µg/L Each Event Grab Outfall Structure
Total Lead, µg/L Each Event Grab Outfall Structure
Total Mercurys, ng/L Each Event Grab Outfall Structure
Total Molybdenum, µg/L lµ3g/L4 lµ3g�L4 Each Event Grab Outfall Structure
Acute Episodic Toxicity6 See A. (15.) 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 10 of 28

Permit NC0003417
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. (14.).
a. The permittee shall obtain authorization from the Division of Water Resources prior to using
any biocide in the cooling water; see condition A. (19.).
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 11 of 28

Permit NC0003417
A. (5.) 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 Location
Flow 8.0 MGD9 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 Nitrogen (TN), mg/L
TN = (NO2 + NO3) + TKN, Monthly Calculated Effluent
mg/L
TN Loads 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, µg/L Monthly Grab Effluent
Total Mercury8, µg/L Monthly Monthly Effluent
Total Selenium, µg/L Monthly Grab Effluent
Total Antimony, µg/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 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. (15.) Total Nitrogen Calculations
6. Chronic Toxicity (Ceriodaphnia) at 4.5%; Monthly; see Special Condition A. (13.).
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
Page 12 of 28

Permit NC0003417
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. This limit is an annual average limit based on a calendar
year.
9. This is a combined flow limit for Outfall 005a and Outfall 005b. The sum of the monthly average
flows from these outfalls shall not exceed 8.0 MGD.
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. 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.
There shall be no discharge of polychlorinated biphenyls (PCBs).
Page 13 of 28

Permit NC0003417
A. (6.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Inactive
Ash Pond Dewatering - Outfall 005b) [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 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 8.0 MGD9 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 Nitrogen (TN), mg/L Monthly Calculated Effluent
TN = (NO2 + NO3) + TKN
TN Loads Monitor 86 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, µg/L Monthly Grab Effluent
Total Mercury8 Monthly Monthly Effluent
Total Selenium Monthly Grab Effluent
Total Antimony, µg/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 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. (15.) Total Nitrogen Calculations.
6. Chronic Toxicity (Ceriodaphnia) at 4.5%; Monthly; see Special Condition A. (13.).
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
Page 14 of 28

Permit NC0003417
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. This limit is an annual average limit based on a calendar
year.
9. This is a combined flow limit for Outfall 005a and Outfall 005b. The sum of the monthly average
flows from these outfalls shall not exceed 8.0 MGD.
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. 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.
There shall be no discharge of polychlorinated biphenyls (PCBs).
Page 15 of 28

Permit NC0003417
A. (7.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall
006) [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 from outfall 006 - Emergency spillway of the
inactive ash pond. 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 Waived Estimate Effluent
pH Waived Grab Effluent
TSS, mg/L Waived Grab Effluent
Oil and Grease, mg/L Waived Grab Effluent
The emergency spillway is designed for safe discharge of the floods and significant rain
events. Sampling of this spillway is waived if unsafe conditions exist during an overflow
event.
A. (8.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall
007) [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 from outfall 007 - Emergency spillway of the
inactive ash pond. 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 Waived Estimate Effluent
pH Waived Grab Effluent
TSS, mg/L Waived Grab Effluent
Oil and Grease, mg/L Waived Grab Effluent
The emergency spillway is designed for safe discharge of the floods and significant rain
events. Sampling of this spillway is waived if unsafe conditions exist during an overflow
event.
Page 16 of 28

Permit NC0003417
A. (9.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall
008) [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 from outfall 008 - Emergency spillway of the
inactive ash pond. 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 Waived _ Estimate Effluent
pH Waived Grab Effluent
TSS, mg/L Waived Grab Effluent
Oil and Grease, mg/L Waived Grab Effluent
The emergency spillway is designed for safe discharge of the floods and significant rain
events. Sampling of this spillway is waived if unsafe conditions exist during an overflow
event.
A. (10.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall
009) [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 from outfall 009 - Emergency spillway of the
inactive ash pond. 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 Waived Estimate Effluent
pH Waived Grab Effluent
TSS, mg/L Waived Grab Effluent
Oil and Grease, mg/L Waived Grab Effluent
The emergency spillway is designed for safe discharge of the floods and significant rain
events. Sampling of this spillway is waived if unsafe conditions exist during an overflow
event.
A. (11.) TOXICITY RE-OPENER CONDITION [15A 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.
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Permit NC0003417
A. (12.) CHRONIC TOXICITY LIMIT (Quarterly - Outfall 001 Phase III)
[15A NCAC 02B .0400 et seq., 02B .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 1.0 %.
The permit holder shall perform at a minimum, quartely 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
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.
Page 18 of 28

Permit NC0003417
A. (13.) CHRONIC TOXICITY LIMIT (Monthly - Outfall 001 Phase II, Outfall 005a
and Outfall 005b) [15A NCAC 02B .0400 et seq., 02B .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 II)/4.5% (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
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, ATForms.ATB(u?deq.nc.gov.
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.
Page 19 of 28

Permit NC0003417
A. (14.) ACUTE TOXICITY MONITORING - Outfalls 002 and 002A
[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 permittee will conduct one test annually, with the annual period
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, ATForms.ATB@;deq.nc.gov.
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. (15.) CALCULATION OF TOTAL NITROGEN LOADS
[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)
Page 20 of 28

Permit NC0003417
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. (16.) 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
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 27699-16 17
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.
ii. 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.
Page 21 of 28

Permit NC0003417
A. (17.) 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 (T 15A
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
ALLOCATION SOURCE DATE STATUS
TYPE Estuary Discharge
(lb/yr) (lb/yr)
NA See Footnote 2. - - - -
TOTAL - - -
Footnote:
1. Transport Factor = 70%
2. Duke Energy Progress' H.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. (18.) 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)).
Page 22 of 28

Permit NC0003417
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)).
is to be "estimated" the estimate can be done b
1) For all outfalls where the flow measurementY
using calibrated V-notch weir, stop-watch and graduated cylinder, or other method approved
by the Division.
A. (19.) 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
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. (20.) CLEAN WATER ACT SECTION 316(b) [40 CFR 125.95]
Based on 40 CFR 125.92 (c) and 40 CFR 125.94 (c) & (d), the Director has determined that the existing
closed-cycle recirculating system at Lee represents the BTA (Best Technology Available) for meeting the
impingement requirements. The permittee shall continue to comply with the Cooling Water Intake
Structure Rule per 40 CFR 125.95.
Copies of all the study plans, study results, and any other applicable materials should be submitted
to:
1) Electronic Version Only (pdf)
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
2) Electronic Version (pdf) and Hard Copy
Division of Water Resources
Water Sciences Section
1621 Mail Service Center
Raleigh, NC 27699-1621
Nothing in this permit authorizes take for the purposes of a facility compliance with the Endangered
Species Act.
A. (21.) 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 23 of 28

Permit NC0003417
A. (22.) STRUCTURAL INTEGRITY INSPECTIONS OF ASH POND DAM [15A NCAC
02K.0208]
The facility shall meet the dam design and dam safety requirements per 15A NCAC 2K.
A. (23.) INSTREAM MONITORING [15A NCAC 02B .0500 et seq.]
The facility shall conduct quarterly instream monitoring (upstream of Outfall 002 - at the Ferry Bridge
Road, and downstream of Outfall 002 - at Stevens Mill Road bridge) for total arsenic, total selenium,
total mercury (method 1631 E), 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 permittee'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 once per permit cycle 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)
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
2) Electronic Version (PDF) and Hard Copy
Division of Water Resources
WSS - Biological Assessment Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
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
Page 24 of 28

Permit NC0003417
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.) (all
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 27699-1617
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, 2025, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
Page 25 of 28

Permit NC0003417
• 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-
d ischarge-eliminatio n-system-npde s-electro nic-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 writing 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.
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
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:
http://deq.nc.gov/about/divisions/water-resources/edmr
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Permit NC0003417
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL
BE ACCEPTED:
"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 fines and imprisonment for knowing violations."
5. Records Retention [Supplements Section D. (6.11
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
122.41].
Page 27 of 28

Permit NC0003417
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Page 28 of 28
Wayne County

Permit NC0003417
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