NC0004979_Issuance of Permit_20180713

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ROY COOPER NORTH CAROLINA
Governor Environmental Quality
MICHAEL S.REGAN
Secretary
LINDA CULPEPPER
Interim Director
July 13, 2018
Mr. Paul Draovitch, Senior Vice President
Environmental, Health and Safety
Duke Energy Carolinas, LLC
Mail Code EC 13K
P.O. Box 1006
Charlotte, North Carolina 28201-1006
Subject: Issuance of NPDES Permit
Permit NC0004979
Allen Steam Station
Gaston County
Facility Class I
Dear Mr. Draovitch:
The Division of Water Resources is forwarding herewith the Final NPDES Permit for Allen
Steam Station. 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 dated October 15, 2007 (or as
subsequently amended).
A public hearing was held on April 8, 2015 in Lincolnton seeking comments on the Draft
permit. This Final permit incorporates recommendations of the DWR Hearing Officer and
EPA as well as other changes:
• The monitoring frequency for As, Se, Hg, and Ag were reduced to weekly from monthly
(Outfall 002 -normal operation/decanting).
• The downstream monitoring location was relocated closer to the ash pond discharge;
the sampling will be conducted 250 meters below Outfall 002.
• The schedule to submit documentation required for 316(b) was reduced to 3.5 years.
• The compliance date for the bottom ash transport water and FGD wastewater was
changed to February 28, 2020.
• The new requirement for the decanting and dewatering stages was added to the permit.
The facility shall immediately discontinue the discharge and report to the DEQ if the
identified pollutants of concern reach 85% of the allowable level.
• The requirement to select a new cold water reference area for the next 316(a) study was
added to the permit.
• The instream monitoring frequency was increased to monthly from semi-annually.
D_EQ,,o)
NORTH CAROLINA
DepaEnvironmental rtment
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11611 Mail Service Center I Raleigh,North Carolina 27699-1611
919.707.9000

If any parts, measurement frequencies, or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within
thirty (30) days following receipt of this letter. This request must be in the form of a written
petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
office of Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714.
Unless such a demand is made, this permit shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect
the legal requirements to obtain other permits which may be required by the Division of Water
Resources or any other Federal, State, or Local governmental permits that may be required.
If you have any questions on this permit, please contact Sergei Chernikov at 919-807-6386.
Sincerely,
( ( C--------
Lind Culpepper, Interim Director
Division of Water Resources
Hardcopy: Central Files,
NPDES Files
Mooresville Regional Office, Water Quality
E-copy: US EPA, Region IV
WSS/Aquatic Toxicology Branch
PERCS
D_EQ,0)
NORTH CAROLINA
Department al FnWmmanta!Otml si
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11611 Mall Service Center I Raleigh,North Carolina 27699-1611
919.707.9000

Permit NC0004979
STA 1'L OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WA 1'LR RESOURCES
PERMIT
TO DISCHARGE WAS'1'LWA'1'LR UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYS 1'LM
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 Carolinas, LLC
is hereby authorized to discharge wastewater from a facility located at the
Allen Steam Station
253 Plant Allen Road (NCSR 2525)
Belmont
Gaston County
to receiving waters designated as the Catawba River(Lake Wylie),unnamed tributary to the Catawba River,and
South Fork Catawba River in the Catawba River Basin in accordance with effluent limitations,monitoring
requirements,and other applicable conditions set forth in Parts I,II,and III.
This permit shall become effective August 1,2018.
This permit and authorization to discharge shall expire at midnight on July 31,2023.
Signed this day July 13,2018.
6...
Linda Culpepp r,Interim Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 25

Permit NC0004979
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 Carolinas,LLC is hereby authorized to:
1. Continue to discharge:
• Outfall 001: once through cooling water.
• Outfall 002:Ash Basin discharge.This outfall includes domestic wastewater,stormwater from the
coal pile area,miscellaneous stormwater flows,ash sluice,wastewater from turbine non-destructive
testing,landfill leachate,FGD blowdown,yard drain sump,water treatment filter backwash,treated
groundwater,laboratory wastes,and the power house sump at Unit 5. The domestic waste is pre-
treated by a septic tank. Outfall 002 wastewater is treated using chemical coagulation,settling,and
pH neutralization. Outfall 002 and Outfall 006 might be operational at the same time during the
transition period.
• Outfall 002A: coal yard sump overflow(discharge from coal handling and storage areas).
• Outfall 002B:power house sump overflow(floor wash water,boiler blowdown,water treatment
waste,condensates, equipment cooling water,sealing water and miscellaneous leakage).
• Outfall 003: miscellaneous equipment non-contact cooling and sealing water.
• Outfall 004:miscellaneous non-contact cooling water,vehicle washwater,and intake screen
backwash.
• Outfall 006: Upon completion of construction of the Retention Basin,discharge domestic
wastewater,stormwater from the coal pile area,miscellaneous stormwater flows,ash sluice,
wastewater from turbine non-destructive testing,landfill leachate,FGD blowdown,yard drain
sump,water treatment filter backwash,treated groundwater,laboratory wastes,and the power
house sump at Unit 5. The domestic waste is pre-treated by a septic tank. Outfall 006 wastewater
is treated using chemical coagulation,settling,and pH neutralization. Outfall 002 and Outfall 006
might be operational at the same time during the transition period.
• Outfall 007: the emergency spillway of the new Retention Basin.The spillway is designed for a
flood greater than 100-year event. Sampling of this spillway is waived due to unsafe conditions
associated with sampling during an overflow event.
• Outfall 008: the emergency spillway of the retired Ash Pond.The spillway is designed for a flood
greater than 100-year event.Sampling of this spillway is waived due to unsafe conditions associated
with sampling during an overflow event.
• Toe Drain Outfalls 103 (lat. -35010.512';long.-8100.360'), 104(lat. -35°10.541';long. - 8100.364'),
108 (lat. -35010.710';long- 8100.384'),and 108B (lat.- 35°10.689';long- 8100.391'):4 potentially
contaminated toe drains.
From a facility located at the Plant Allen Steam Station on Plant Allen Road(NCSR 2525), south of
Belmont in Gaston County,and
2. Without adding detergents or chemicals of any kind, discharge Asiatic clam/debris filter backwash from the
intake filter screen,in accordance with condition A. (10.),and
3. Continue to operate a Flue Gas Desulfurization (FGD)wet scrubber wastewater treatment system
discharging to the Ash Basin through Internal Outfall 005;consisting of:
• A flow equalization tank and a maintenance tank
• Feed systems for lime, sulfide,iron addition,polymer,hydrochloric acid,and nutrient addition
• Two clarifiers
• Dual heat exchangers
• Selenium reduction bioreactors
Page 2 of 25

Permit NC0004979
• A sludge treatment system including three filter presses;and
4. Discharge from said treatment works at the location specified on the attached map into the Catawba River
classified as WS-IV B (outfalls 002,002A,002B,004,006,008, 103, 108,and 108B), the unnamed tributary
to Catawba River classified as WS-IV B (Outfall 104),and the South Fork Catawba River classified as WS-V
(outfalls 001 and 003),in the Catawba River Basin.
•
Page 3 of 25

Permit NC0004979
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (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 expiration,the Permittee is
authorized to discharge from outfall 001-Condenser Cooling Water(CCW). Such discharges shall be limited and
monitored2 by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Max. Frequency
Flow,MGD Daily Pump Logs Effluent
Temperature 38.9°C DailyGrab or Effluent
(June 1 —September 30)1 (102°F) Instantaneous
Temperature 35°C DailyGrab or Effluent
(October 1 —May 31)1 (95°F) Instantaneous
Notes:
1. Based upon studies conducted by the permittee and submitted to the Division,it has been determined pursuant
to Section 316(a) of the Clean Water Act that the thermal component of the discharge assures the protection
and propagation of a balanced,indigenous population of shellfish,fish and wildlife in the receiving water body.
2. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
Chlorination of the once through condenser cooling water,discharged through outfall 001,is not allowed
under this permit. Should Duke Energy Carolinas,LLC wish to chlorinate its condenser cooling water, a
permit modification must be obtained beforehand.
Page 4 of 25

Permit NC0004979
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002-normal
operation/decanting)
[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 002—ash pond effluent(decanting the free water above the settled ash
layer that does not involve mechanical disturbance of the ash). Such discharges shall be limited and
monitored4 by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Type Sample
Average Maximum Frequency Location
Instantaneous Influent or
Flow,MGD Weekly
or Estimate Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Monthly Grab Effluent
Total Suspended Solids8 30.0 mg/L 50.0 mg/L Monthly Grab Effluent
Total Copper 1 1.0 mg/L 1.0 mg/L Monthly Grab Effluent
Total Iron 1 1.0 mg/L 1.0 mg/L Monthly Grab Effluent
BOD, 5-day,20°C6 30.0 mg/L 45.0 mg/L Monthly Grab Effluent
Fecal Coliform (geo.mean)6 200/100 mL 400/100 mL Monthly Grab Effluent
Total Selenium,µg/L Weekly Grab Effluent
Total Arsenic,µg/L Weekly Grab Effluent
Total Silver 0.255 µg/L 1.081 µg/L Weekly Grab Effluent
Total Nickel,µg/L Monthly Grab Effluent
Total Lead,µg/L Monthly Grab Effluent
Total Mercury 2,ng/L Weekly Grab Effluent
Total Nitrogen
(NO2 +NO3 +TKN),mg/L Quarterly Grab Effluent
Total Phosphorus,mg/L Quarterly Grab Effluent
Chronic Toxicity 3 Quarterly Grab Effluent
Total Hardness,mg/L Monthly Grab Effluent
Turbiditys,NTU Monthly Grab Effluent
Bromide,mg/L Monthly Grab Effluent
pHA Between 6.0 and 9.0 standard Monthly Grab Effluent
units
Footnotes:
1. The limits for total copper and total iron only apply when chemical metal cleaning wastewaters are being
discharged.
2. Mercury shall be measured using EPA Method 1631E.
3. Whole Effluent Toxicity shall be monitored by chronic toxicity(Ceriodaphnia) P/F at 23.6%,see Special
Condition A. (17.).
4. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
Page 5 of 25

Permit NC0004979
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. The limit and monitoring apply only when the domestic wastewater is being discharged to the basin.
7. The facility shall continuously monitor pH when the decanting process commences (and the pump is operating)
and the decanting pump shall be shutoff automatically when the 15 minutes running average pH falls below 6.1
standard units or rises above 8.9 standard units.Pumping will be allowed to continue if interruption might result
in a dam failure or damage.The continuous pH monitoring is only required when the pumps are employed for
decanting.
8. The facility shall continuously monitor TSS concentration when the decanting process commences (and the
pump is operating) and the decanting pump shall be shutoff automatically when one half of the Daily Maximum
limit(15 minutes average)is exceeded.Pumping will be allowed to continue if interruption might result in a dam
failure or damage.The continuous TSS monitoring is only required when the pumps are employed for
decanting.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
If any one of the pollutants (As, Se,Hg,Ni, and Pb) reaches 85%of the allowable level during the
decanting/dewatering,the facility shall immediately discontinue discharge of the wastewater and report it
to the Regional Office and Complex NPDES Permitting Branch via telephone and e-mail.
The facility is allowed to drawdown the wastewater in the ash pond to no less than three feet above the
ash. 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.
The facility shall use a floating pump suction pipe with free water skimmed from the basin surface using
an adjustable weir.
Lowering the level below the three feet mark triggers the limits and conditions in Section A. (3.) of the
permit.
By November 1,2018 there shall be no discharge of pollutants in fly ash transport water.This requirement
only applies to fly ash transport water generated after November 1,2018.
By February 28,2020 there shall be no discharge of pollutants in bottom ash transport water.This
requirement only applies to bottom ash transport water generated after December 31,2023.
In accordance with the N.C.G.S. §130A-309.210,by December 31,2019,the facility shall convert to the
disposal of dry bottom ash,as defined in the Coal Ash Management Act("CAMA").
The facility shall notify via e-mail DWR Complex NPDES Permitting Unit and DWR Mooresville
Regional Office,in writing,seven calendar days prior to the commencement of the decanting.
When the facility commences the ash pond/ponds decanting,the facility shall treat the wastewater
discharged from the ash pond/ponds 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 Mooresville Regional Office,in writing,within seven calendar days of
installing additional physical-chemical treatment at this Outfall.
Page 6 of 25

Permit NC0004979
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002-dewatering)
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.]
During the period beginning on the commencement of dewatering and lasting until expiration,the Permittee is
authorized to discharge from outfall 002—ash pond effluent(dewatering-removing the interstitial water).
Such discharges shall be limited and monitored4 by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Type Sample
Average Maximum Frequency Location
Instantaneous Influent or
Flow,MGD 1.09 Daily
or Estimate Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Grab Effluent
Total Suspended Solids6 30.0 mg/L 50.0 mg/L Weekly Grab Effluent
Total Copper 1 1.0 mg/L 1.0 mg/L Weekly Grab Effluent
Total Iron 1 1.0 mg/L 1.0 mg/L Weekly Grab Effluent
BOD,5-day,20°C 7 30.0 mg/L 45.0 mg/L Weekly Grab Effluent
Fecal Coliform(geo. mean)7 200/100 mL 400/100 mL Weekly Grab Effluent
Total Selenium,µg/L Weekly Grab Effluent
Total Arsenic,µg/L Weekly Grab Effluent
Total Silver 3.74µg/L 15.13µg/L Weekly Grab Effluent
Total Mercury 2,ng/L Weekly Grab Effluent
Total Nitrogen
(NO2+NO3 +TICN),mg/L Weekly Grab Effluent
Total Phosphorus,mg/L Weekly Grab Effluent
Chronic Toxicity 3 Monthly Grab Effluent
Total Hardness,mg/L Weekly Grab Effluent
Turbidity5,NTU Weekly Grab Effluent
Bromide,mg/L Weekly Grab Effluent
Total Chromium,µg/L Weekly Grab Effluent
Total Lead,µg/L Weekly Grab Effluent
Total Nickel,µg/L Weekly Grab Effluent
Total Cadmium,µg/L Weekly Grab Effluent
Total Zinc,µg/L Weekly Grab Effluent
TDS,mg/L Weekly Grab Effluent
pH8 Between 6.0 and 9.0 standard Weekly Grab Effluent
units
Footnotes:
1. The limits for total copper and total iron only apply when chemical metal cleaning wastewaters are being
discharged.
2. Mercury shall be measured using EPA Method 1631E.
3. Whole Effluent Toxicity shall be monitored by chronic toxicity(Ceriodaphnia)P/F at 1.6%,see Special
Condition A. (17.).
Page 7 of 25

Permit NC0004979
4. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (26.).
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. The facility shall continuously monitor TSS concentration when the dewatering process commences (and the
pump is operating) 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 if interruption might
result in a dam failure or damage.The continuous TSS monitoring is only required when the pumps are
employed for dewatering.
7. The limit and monitoring apply only when the domestic wastewater is being discharged to the basin.
8. The facility shall continuously monitor pH when the dewatering process commences (and the pump is
operating) and the dewatering pump shall be shutoff automatically when the 15 minutes running average pH
falls below 6.1 standard units or rises above 8.9 standard units.Pumping will be allowed to continue if
interruption might result in a dam failure or damage.The continuous pH monitoring is only required when the
pumps are employed for dewatering.
9. The limit applies only when pumping is used for dewatering.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
If any one of the pollutants (As, Se,Hg,Ni,and Pb) reaches 85%of the allowable level during the
decanting/dewatering,the facility shall immediately discontinue discharge of the wastewater and report it
to the Regional Office and Complex NPDES Permitting Branch via telephone and e-mail.
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.
The facility shall use a floating pump suction pipe with free water skimmed from the basin surface using
an adjustable weir.
By November 1,2018 there shall be no discharge of pollutants in fly ash transport water.This requirement
only applies to fly ash transport water generated after November 1,2018.
By February 28,2020 there shall be no discharge of pollutants in bottom ash transport water.This
requirement only applies to bottom ash transport water generated after December 31,2023.
In accordance with the N.C.G.S. §130A-309.210,by December 31,2019,the facility shall convert to the
disposal of dry bottom ash, as defined in the Coal Ash Management Act("CAMA").
The facility shall notify DWR Complex NPDES Permitting Unit and DWR Mooresville Regional Office
seven calendar days,in writing,prior to the commencement of the dewatering.
When the facility commences the ash pond/ponds dewatering,the facility shall treat the wastewater
discharged from the ash pond/ponds 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 Mooresville Regional Office,in writing,within seven calendar days of
installing additional physical-chemical treatment at this Outfall.
Page 8 of 25

Permit NC0004979
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (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 from outfall 002A—Coal Yard Sump Overflows. Such discharges shall be limited and
monitored2 by the Permittee as specified below:
EFFLUENT LIMITS- MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample Locations
Average Maximum Frequency .Type
Flow,MGD Per discharge event Estimate Effluent
pH Between 6.0 and 9.0 standard Per discharge event Grab Effluent
ts
Oil and Grease 15.0 mg/L 20.0 mg/L Per discharge event Grab Effluent
Total Suspended Solids 30.0 mg/L 50.0 mg/L Per discharge event Grab Effluent
BOD,5-day,20°C4 30.0 mg/L 45.0 mg/L Per discharge event Grab Effluent
Fecal Coliform(geo. 200/100 mL 400/100 mL Per discharge event Grab Effluent
mean)4
Total Copper3 1.0 mg/L 1.0 mg/L Per discharge event Grab Effluent
Total Iron3 1.0 mg/L 1.0 mg/L Per discharge event Grab Effluent
Footnotes:
1. Effluent sampling shall be conducted at a point upstream of discharge to the receiving stream.
2. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
3. The limits for total copper and total iron only apply when chemical metal cleaning wastewaters are being
discharged.
4. The limit and monitoring apply only when the domestic wastewater is being discharged to the basin.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
All flows shall be reported on monthly DMRs. If no flow occurs during a given month,the words "no
flow"should be clearly written on the front of the DMR. All samples shall be of a representative discharge.
Page 9 of 25

Permit NC0004979
A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002B)
[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 002B—Power House Sump Overflows. Such discharges shall be limited and
monitored3 by the Permittee as specified below:
EFFLUENT ' LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample
Average Maximum Frequency Location1
Flow,MGD Per discharge Estimate Effluent
event
pH Between 6.0 and 9.0 standard Per discharge Grab Effluent
units event
Oil and Grease 15.0 mg/L 20.0 mg/L Per discharge Grab Effluent
event
Total Suspended Solids 30.0 mg/L 100.0 mg/L Per discharge Grab Effluent
event
Total Copper2 1.0 mg/L 1.0 mg/L Per discharge Grab Effluent
event
Total Iron 1.0 mg/L 1.0mg/L Per discharge Grab Effluent
event
Footnotes:
1. Effluent sampling shall be conducted at a point upstream of discharge to the receiving stream.
2. The limits for total copper and total iron only apply when chemical metal cleaning wastewaters are being
discharged.
3. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
All flows shall be reported on monthly DMRs. If no flow occurs during a given month,the words"no
flow"should be clearly written on the front of the DMR. All samples shall be of a representative discharge.
Page 10 of 25

Permit NC0004979
A. (6.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (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 from outfall 003—miscellaneous equipment non-contact water and sealing water.
Such discharges shall be limited and monitored) by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow,MGD Weekly Estimate Effluent
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
Chlorination of the once through cooling water,discharged through outfall 003,is not allowed under this
permit. If Duke Energy Carolinas,LLC wishes to chlorinate this once through cooling water, a permit
modification must be obtained beforehand.
A. (7.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 004)
[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 004-miscellaneous non-contact cooling water,vehicle washwater,and
intake screen backwash. Such discharges shall be limited and monitored) by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample
Average Maximum Frequency Location
Flow,MGD Weekly Estimate Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Quarterly Grab Effluent
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
Chlorination of the once through cooling water,discharged through outfall 004,is not allowed under this
permit. If Duke Energy Carolinas,LLC wishes to chlorinate this once through cooling water,a permit
modification must be obtained beforehand.
Page 11 of 25

Permit NC0004979
A. (8.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Internal Outfall 005)
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until permit expiration,the Permittee is
authorized to discharge from internal outfall 005-treated FGD wet scrubber wastewater to ash settling basin.
Such discharges shall be limited and monitored2 by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type -Location'
Pump logs or
Flow,MGD Monitor&Report Monthly similar Effluent
readings
Total Arsenic 8.0µg/L4 11.0µg/L4 Quarterly Grab Effluent
Total Mercury3,ng/L 356.0 ng/L4 788.0 ng/L4 Quarterly Grab Effluent
Total Selenium 12.0 µg/L4 23.0 rg/L4 Quarterly Grab Effluent
Nitrate/nitrite as N 4.4 mg/L4 17.0 mg/L4 Quarterly Grab Effluent
pH Monthly Grab Effluent
Footnotes:
1. "Effluent"shall be defined as the discharge from the FGD wastewater treatment system prior to commingling
with other waste streams.
2. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Please See Special Condition A. (26.).
3. The facility shall use method 1631E.
4. In accord with the Steam Electric Effluent Limitations Guidelines for FGD wastewater (40 C.F.R.
423), these limits shall become effective on February 28,2020. This permit may be reopened and
modified if changes are made to 40 C.F.R.423.
This permit shall be reopened and modified to reflect any changes in the 40 CFR 423.
All flows shall be reported on monthly DMRs. If no flow occurs during a given month,the words "no
flow"shall be clearly written on the front of the DMR. All samples shall be of a representative discharge.
The facility shall operate the FGD treatment system until all coal-fired units are retired.
Page 12 of 25

Permit NC0004979
A. (9.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 006)
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.]
During the period beginning upon commencement of operations and lasting until expiration,the Permittee is
authorized to discharge from outfall 006—Retention Basin discharge. Such discharges shall be limited and
monitored) by the Permittee as specified below:
EFFLUENT DISCHARGE LIMITATIONS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow,MGD Weekly Instantaneous Effluent
or Estimate
pH Between 6.0 and 9.0 standard Monthly Grab Effluent
units
TSS 30.0 mg/L 100.0 mg/L Monthly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Monthly Grab Effluent
BOD, 5-day,20°C5 30.0 mg/L 45.0 mg/L Monthly Grab Effluent
Fecal Coliform(geo.mean)5 200/100 mL 400/100 mL Monthly Grab Effluent
Fluoride,mg/L Monthly Grab Effluent
Total Mercury2,ng/L Monthly Grab Effluent
Total Silver 1.17 µg/L 4.79 µg/L Monthly Grab Effluent
Total Iron3 1.0 mg/L 1.0 mg/L Monthly Grab Effluent
Total Zinc,µg/L Monthly Grab Effluent
Total Arsenic,µg/L Monthly Grab Effluent
Total Cadmium,µg/L Monthly Grab Effluent
Total Chromium,µg/L Monthly Grab Effluent
Total Copper3 1.0 mg/L 1.0 mg/L Monthly Grab Effluent
Total Lead,µg/L Monthly Grab Effluent
Total Nickel,µg/L Monthly Grab Effluent
Total Selenium,µg/L Monthly Grab Effluent
Total Nitrogen Quarterly Grab Effluent
(NO2+NO3 +TKN),mg/L
Total Phosphorus,mg/L Quarterly Grab Effluent
_Sulfates,mg/L Monthly Grab Effluent
Chlorides,mg/L Monthly Grab Effluent
Bromide,mg/L Monthly Grab Effluent
IDS,mg/L Monthly Grab Effluent
Total Hardness,mg/L Monthly Grab Effluent
Temperature,0C Monthly Grab Effluent
Conductivity,µmho/cm Monthly Grab Effluent
Chronic Toxicity4 Monthly Grab Effluent
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
2. The facility shall use EPA method 1631E.
3. The limits for total copper and total iron only apply when chemical metal cleaning wastewaters are being
discharged.
4. Whole Effluent Toxicity shall be monitored by chronic toxicity(Ceriodaphnia)P/F at 5.1%,see Special
Condition A. (17.).
5. The limit and monitoring apply only when the domestic wastewater is being discharged to the basin.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 13 of 25

Permit NC0004979
The facility shall submit EPA Form 2C for Outfall 006 no later than 180 days from the commencement of
the discharge.The facility shall notify DWR/NPDES,in writing,30 days prior to the commencement of
the discharge from this outfall.
A. (10.) 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 new Retention Basin. Such discharges shall be
limited and monitored) by the Permittee as specified below:
EFFLUENT DISCHARGE LIMITATIONS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency - Type Location °
Flow,MGD Waived Estimate Effluent
pH Waived Grab Effluent
TSS Waived Grab Effluent
Oil and Grease Waived Grab Effluent
The emergency spillway is designed for a flood greater than 100-year event in Gaston County. Sampling of
this spillway is waived due to unsafe conditions associated with sampling during an overflow event.
Monitoring is required for any other rain event that might trigger a discharge.
A. (11.) 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 retired ash basin. Such discharges shall be
limited and monitored) by the Permittee as specified below:
EFFLUENT DISCHARGE LIMITATIONS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow,MGD Waived Estimate Effluent
pH Waived Grab Effluent
TSS Waived Grab Effluent
Oil and Grease Waived Grab Effluent
The emergency spillway is designed for a flood greater than 100-year event in Gaston County. Sampling of
this spillway is waived due to unsafe conditions associated with sampling during an overflow event.
Monitoring is required for any other rain event that might trigger a discharge.
Page 14 of 25

Permit NC0004979
A. (12.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 103)
[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 103—Toe Drain Discharge. Such discharges shall be limited and monitored) by
the Permittee as specified below:
EFFLUENT DISCHARGE LIMITATIONS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency2 Type Location
Flow,MGD Monthly/Quarterly Estimate Effluent
pH3 Monthly/Quarterly Grab Effluent
TSS 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent
Fluoride,mg/L Monthly/Quarterly Grab Effluent
Total Mercury4,ng/L Monthly/Quarterly Grab Effluent
Total Barium,mg/L Monthly/Quarterly Grab Effluent
Total Iron,mg/L Monthly/Quarterly Grab Effluent
Total Manganese,µg/L Monthly/Quarterly Grab Effluent
Total Zinc,µg/L Monthly/Quarterly Grab Effluent
Total Arsenic,µg/L Monthly/Quarterly Grab Effluent
Total Cadmium,µg/L Monthly/Quarterly Grab Effluent
Total Chromium,µg/L Monthly/Quarterly Grab Effluent
Total Copper,µg/L Monthly/Quarterly Grab Effluent
Total Lead,pg/L Monthly/Quarterly Grab Effluent
Total Nickel,µg/L Monthly/Quarterly Grab Effluent
Total Selenium,µg/L Monthly/Quarterly Grab Effluent
Nitrate as N,mg/L Monthly/Quarterly Grab Effluent
Sulfates,mg/L Monthly/Quarterly Grab Effluent
Chlorides,mg/L Monthly/Quarterly Grab Effluent
TDS,mg/L Monthly/Quarterly Grab Effluent
Total Hardness,mg/L Monthly/Quarterly Grab Effluent
Temperature,0C Monthly/Quarterly Grab Effluent
Conductivity,µmho/cm Monthly/Quarterly Grab Effluent
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
2. The facility shall conduct monthly sampling from the effective date of the permit.After one year from the
effective date of the permit the monitoring will be reduced to quarterly
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
4. The facility shall use EPA method 1631E.
If no discharge occurs during the reporting period or the Permittee is unable to obtain a representative
sample due to low-flow conditions at the toe drain,the Permittee shall submit its DMR,as required, and
indicate "No Flow" for the toe drain(15A NCAC 02B .0506(a)(1)(E)).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 15 of 25

Permit NC0004979
A. (13.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 104)
[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 104—Toe Drain Discharge. Such discharges shall be limited and monitored1 by
the Permittee as specified below:
EFFLUENT DISCHARGE LIMITATIONS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily - Measurement Sample Sample
Average Maximum ' Frequency2 Type Location
Flow,MGD Monthly/Quarterly Estimate Effluent
pH3 Monthly/Quarterly Grab Effluent
TSS 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent
Fluoride,mg/L Monthly/Quarterly Grab Effluent
Total Mercury4,ng/L Monthly/Quarterly Grab Effluent
Total Barium,mg/L Monthly/Quarterly Grab Effluent
Total Iron,mg/L Monthly/Quarterly Grab Effluent
Total Manganese,pg/L Monthly/Quarterly Grab Effluent
Total Zinc,µg/L Monthly/Quarterly Grab Effluent
Total Arsenic,µg/L Monthly/Quarterly Grab Effluent
Total Cadmium,µg/L Monthly/Quarterly Grab Effluent
Total Chromium,µg/L Monthly/Quarterly Grab Effluent
Total Copper,µg/L Monthly/Quarterly Grab Effluent
Total Lead,µg/L Monthly/Quarterly Grab Effluent
Total Nickel,µg/L Monthly/Quarterly Grab Effluent
Total Selenium,µg/L Monthly/Quarterly Grab Effluent
Nitrate as N,mg/L Monthly/Quarterly Grab Effluent
Sulfates,mg/L Monthly/Quarterly Grab Effluent
Chlorides,mg/L Monthly/Quarterly Grab Effluent
TDS,mg/L Monthly/Quarterly Grab Effluent
Total Hardness,mg/L Monthly/Quarterly , Grab Effluent
Temperature,°C Monthly/Quarterly Grab Effluent
Conductivity,µmho/cm Monthly/Quarterly Grab Effluent
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
2. The facility shall conduct monthly sampling from the effective date of the permit.After one year from the
effective date of the permit the monitoring will be reduced to quarterly
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
4. The facility shall use EPA method 1631E.
If no discharge occurs during the reporting period or the Permittee is unable to obtain a representative
sample due to low-flow conditions at the toe drain,the Permittee shall submit its DMR, as required,and
indicate"No Flow"for the toe drain(15A NCAC 02B .0506(a)(1)(E)).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 16 of 25

Permit NC0004979
A. (14.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 108)
[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 108—Toe Drain Discharge. Such discharges shall be limited and monitored'by
the Permittee as specified below:
EFFLUENT DISCHARGE LIMITATIONS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency2 Type Location
Flow,MGD Monthly/Quarterly Estimate Effluent
pH3 Monthly/Quarterly Grab Effluent
TSS 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent
Fluoride,mg/L Monthly/Quarterly Grab Effluent
Total Mercury'',ng/L Monthly/Quarterly Grab Effluent
Total Barium,mg/L Monthly/Quarterly Grab Effluent
Total Iron,mg/L Monthly/Quarterly Grab Effluent
Total Manganese,µg/L Monthly/Quarterly Grab Effluent
Total Zinc,µg/L Monthly/Quarterly Grab Effluent
Total Arsenic,µg/L Monthly/Quarterly Grab Effluent
Total Cadmium,µg/L Monthly/Quarterly Grab Effluent
Total Chromium,µg/L Monthly/Quarterly Grab Effluent
Total Copper,µg/L Monthly/Quarterly Grab Effluent
Total Lead,µg/L Monthly/Quarterly Grab Effluent
Total Nickel,µg/L Monthly/Quarterly Grab Effluent
Total Selenium,pg/L Monthly/Quarterly Grab Effluent
Nitrate as N,mg/L Monthly/Quarterly Grab Effluent
Sulfates,mg/L Monthly/Quarterly Grab Effluent
Chlorides,mg/L Monthly/Quarterly Grab Effluent
fl)S,mg/L Monthly/Quarterly Grab Effluent
Total Hardness,mg/L Monthly/Quarterly Grab Effluent
Temperature,0C Monthly/Quarterly Grab Effluent
Conductivity,µmho/cm Monthly/Quarterly Grab Effluent
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
2. The facility shall conduct monthly sampling from the effective date of the permit.After one year from the
effective date of the permit the monitoring will be reduced to quarterly
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
4. The facility shall use EPA method 1631E.
If no discharge occurs during the reporting period or the Permittee is unable to obtain a representative
sample due to low-flow conditions at the toe drain,the Permittee shall submit its DMR, as required,and
indicate "No Flow"for the toe drain(15A NCAC 02B .0506(a)(1)(E)).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 17 of 25

Permit NC0004979
A. (15.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 108B)
[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 108B—Toe Drain Discharge. Such discharges shall be limited and monitored'
by the Permittee as specified below:
EFFLUENT DISCHARGE LIMITATIONS - MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency2 Type Location
Flow,MGD Monthly/Quarterly Estimate Effluent
pH3 Monthly/Quarterly Grab Effluent
TSS 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent
Fluoride,mg/L Monthly/Quarterly Grab Effluent
Total Mercury4,ng/L Monthly/Quarterly Grab Effluent
Total Barium,mg/L Monthly/Quarterly Grab Effluent
Total Iron,mg/L Monthly/Quarterly Grab Effluent
Total Manganese,µg/L Monthly/Quarterly Grab Effluent
Total Zinc,µg/L Monthly/Quarterly Grab Effluent
Total Arsenic,µg/L Monthly/Quarterly Grab Effluent
Total Cadmium,µg/L Monthly/Quarterly Grab Effluent
Total Chromium,µg/L Monthly/Quarterly Grab Effluent
Total Copper,µg/L Monthly/Quarterly Grab Effluent
Total Lead,µg/L Monthly/Quarterly Grab Effluent
Total Nickel,µg/L Monthly/Quarterly Grab Effluent
Total Selenium,µg/L Monthly/Quarterly Grab Effluent
Nitrate as N,mg/L Monthly/Quarterly Grab Effluent
Sulfates,mg/L Monthly/Quarterly Grab Effluent
Chlorides,mg/L Monthly/Quarterly Grab Effluent
IDS,mg/L Monthly/Quarterly Grab Effluent
Total Hardness,mg/L Monthly/Quarterly Grab Effluent
Temperature,°C Monthly/Quarterly Grab Effluent
Conductivity,µmho/cm Monthly/Quarterly Grab Effluent
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. Please See Special Condition A. (26.).
2. The facility shall conduct monthly sampling from the effective date of the permit.After one year from the
effective date of the permit the monitoring will be reduced to quarterly
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
4. The facility shall use EPA method 1631E.
If no discharge occurs during the reporting period or the Permittee is unable to obtain a representative
sample due to low-flow conditions at the toe drain,the Permittee shall submit its DMR,as required, and
indicate "No Flow" for the toe drain(15A NCAC 02B .0506(a)(1)(E)).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 18 of 25

Permit NC0004979
A. (16.) SPECIAL CONDITION FOR THE DISCHARGE OF ASIATIC CLAM/DEBRIS FILTER
BACKWASH
[NCGS 143-215.3 (a) (2) and NCGS 143-215.66]
The permittee may backwash the intake filter for Unit 5 condenser cooling water on an as-needed basis. It is
understood that this wash water will contain materials indigenous to the Catawba River such as Asiatic clams and
light debris. As these are naturally occurring in the river environment,they may be discharged with no adverse
affects to the receiving stream. The Permittee may not add any detergent,chemicals or other non-indigenous
material to the wash water without explicit permission from the Division of Water Resources.
A. (17.) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QUARTERLY/MONTHLY) (Outfall 002
and Outfall 006)
[15A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Cetiodaphnia dubia at an effluent concentration of 23.6% for decanting/normal operations (Outfall 002), 5.1%
for retention basin discharge(Outfall 006),and 1.6% for dewatering(Outfall 002).
The permit holder shall perform at a minimum,quarterly(for normal operation/decanting at Outfall 002 and Outfall
006),and monthly(for dewatering at Outfall 002) 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 single 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 on the Effluent Discharge
Monitoring Form (MR-1) 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
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 quarter,
Page 19 of 25

Permit NC0004979
which is the three month time interval that begins on the first day of the month in which toxicity testing is required
by this permit and continues until the final day of the third 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.
NO LE: 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. (18.) BIOCIDE CONDITION
[NCGS 143-215.1]
The permittee shall not use any biocides except those approved in conjunction with the permit application. 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. (19.)ADDITIONAL CONDITIONS AND DEFINITIONS
[NCGS 143-215.3 (a) (2) and NCGS 143-215.66]
1. EPA methods 200.7 or 200.8 (or the most current versions) shall be used for analyses of all metals except
for total mercury(EPA Method 1631E).
2. 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(1)).
3. 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)).
4. 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)).
5. 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)).
6. 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.
7. The term "FGD wet scrubber wastewater" means wastewater resulting from the use of the flue-gas
desulfurization wet scrubber.
8. There shall be no discharge of polychlorinated biphenyl compounds.
9. The permittee shall report the presence of cenospheres observed in any samples on the DMRs.
10. The applicant is permitted to discharge chemical metal cleaning wastes to the ash basin.
11. 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 and regulations.
A. (20.) STRUCTURAL INTEGRITY INSPECTIONS OF ASH DAMS
[15A NCAC 02K.0208]
The facility shall meet the dam design and dam safety requirements per 15A NCAC 2K.
Page 20 of 25

Permit NC0004979
A. (21.) CLEAN WATER ACT SECTION 316 (a)THERMAL VARIANCE
[40 CFR 125,Subpart H]
The thermal variance granted under Section 316(a) terminates on expiration of this NPDES permit. Should the
permittee wish a continuation of its 316(a) thermal variance beyond the term of this permit,reapplication for such
continuation shall be submitted in accordance with 40 CFR Part 125,Subpart H and Section 122.21(m)(6) not later
than 3.5 years from the effective date of the permit.Reapplication shall include a basis for continuation such as a)
plant operating conditions and load factors are unchanged and are expected to remain so for the term of the
reissued permit;b) there are no changes to plant discharges or other discharges in the plant site area which could
interact with the thermal discharges;and c) there are no changes to the biotic community of the receiving water
body which would impact the previous variance determination.
The next 316(a) studies shall be performed in accordance with the Division of Water Resources approved plan. The
temperature analysis and the balanced and indigenous study plan shall conform to the specifications outlined in 40
CFR 125 Subpart H,the EPA's Draft 316(a) Guidance Manual,dated 1977,and the Region 4 letter to NCDENR,
dated June 3,2010. EPA shall be provided an opportunity to review the plan prior to the commencement of the
study.
The facility shall select a new cold water reference area approved by the Division of Water Resources
during the next 316(a) study.
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 27699-1617
2) Electronic Version (pdf and CD) and Hard Copy
Division of Water Resources
Water Sciences Section
1623 Mail Service Center
Raleigh,NC 27699-1623
A. (22.) 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.The permittee shall
submit all the materials required by the Rule 3.5 years from the effective date of the permit.
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 27699-1617
2) Electronic Version (pdf and CD) and Hard Copy
Division of Water Resources
Water Sciences Section
1623 Mail Service Center
Raleigh,NC 27699-1623
Page 21 of 25

Permit NC0004979
Pursuit to 40 CFR 125.98 the Director has determined that operating and maintaining the existing traveling screen
system which includes a fish handling return system meets the requirements for the interim BTA.
Nothing in this permit authorizes take for the purposes of a facility's compliance with the Endangered Species Act.
A. (23.) FISH TISSUE MONITORING NEAR ASH POND DISCHARGE
[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 be 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 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 27699-1617
2) Electronic Version (pdf and CD) and Hard Copy
Division of Water Resources
Water Sciences Section
1623 Mail Service Center
Raleigh,NC 27699-1623
A. (24.) INSTREAM MONITORING
[15A NCAC 02B.0500 ET SEQ.]
The facility shall conduct monthly in-stream monitoring for total arsenic, total selenium, total mercury, total
chromium, dissolved lead, dissolved cadmium, dissolved copper, dissolved zinc, total bromide, total hardness (as
CaCO3), turbidity, temperature, and total dissolved solids (1'DS). The monitoring results shall be reported on the
facility's Discharge Monitoring Reports and included with the NPDES permit renewal application.The upstream site
(Station 250)is approximately 1.1 miles upstream of the discharge and the downstream location is approximately 250
meters downstream of the discharge.
A. (25.) PRIORITY POLLUTANT ANALYSIS
[NCGS 143-215.1 (b)]
The permittee shall conduct a priority pollutant analysis (in accordance with 40 CFR Part 136) once per permit cycle
at all external outfalls and submit the results with the application for permit renewal.
A. (26.) 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.
NO'l'h: 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
Page 22 of 25

Permit NC0004979
• 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)]
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 DEQ /Division of Water Resources /Water Quality Permitting Section
A TEENTION: 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 21,2020,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)].
Page 23 of 25

Permit NC0004979
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:
https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-pollutant-discharge-
elimination-system-npdes-electronic-rep orting-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)]
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
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
ACCEP
"I cert,under penal0 of law, that this document and ali attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel propertygather and evaluate the information submitted.Based
on my inquiry of the person or persons who manage the system, or those persons directly responsible forgathering 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.)]
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 24 of 25

Permit NC0004979
A. (27.) APPLICABLE STATE LAW(State Enforceable Only)
[NCGS 143-215.1(b)]
This facility shall meet the General Statute requirements under NCGS 5 130A-309.200 et seq.This permit may be
reopened to include new requirements imposed under these Statutes.
A. (28.) 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 25

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Duke Energy Corporation
Allen Steam Station
State Grid/Ouad: G14NE/Belmont Permitted Flow: Not limited Map not to scale
Receiving Streams: Catawba and South Fork Catawba Rivers
Stream Class: WS-IV B&WS-V B 8-Digit HUC 03050102
Drainage Basin: Catawba River Basin Sub-Basin: 03-08-34
Latitude(001): 35°11'23" N Longitude(001): 81°00'45" W
Latitude(002): 35°10'30" N Longitude(002): 81°00'23" W Facility
Latitude(002A): 35°11'34" N Longitude(002A}: 81°00'22" WA x
Latitude(002B): 35°11'36" N Longitude(002B): 81°00'30" W Location
Latitude(003): 35°11'23" N Longitude(003): 81°00'45" W
Latitude(004): 35°11'35" N Longitude(004): 81°00'22" W ..
Latitude(006): 35°10'50" N Longitude(0061: 81°00'49" W NPDES Permit No. NC0004979
Latitude(007): 35°11'55" N Longitude(007): 81°00'36" W North Gaston County
Latitude(008): 35°10'55" N Longitude(008): 81°00'24" W

Attachment A
: P ,5
NOTES . • 1,,t
I)SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS I • H ) .r S .,
SOURCES AIOARE A MIF OF SURVEYED AND - • • ri
APPROXIMATE LOCATIONS THEREFORE.SAMPLE1111
LOCATONS ARE TO BE DEEMED APPROXIMATE
N
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DATED APRIL,].ID,A r•=—.. —•:R.../"�.. f 'j
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ACTIVE ASH BASIN WASTE BOUNDARY 400 200 0 400 FIGURE 1
ENACTIVE ASH BASIN WASTE BOUNDSVY GRAPHIC SCALE IN FEET ASH BASIN WASTE AND
~j ASH BASINCOMPLIANCE BOUNDARY 0 008 RIVER STREEP,SAPB ago COMPLIANCE BOUNDARIES
GXEENVME.SOUTH GROUHA]96(11 ALLEN STEAM STATION
LANDFILL BOUNDARY
ONE E6EA219999
LANDFILL
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STRUCTURAL
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NPDES Permit Standard Conditions
Page 1 of 18
PART II
STANDARD CONDITIONS FOR NPDES PERMITS
Section A. Definitions
2/Month
Samples are collected twice per month with at least ten calendar days between sampling events.These samples shall be
representative of the wastewater discharged during the sample period.
3/Week
Samples are collected three times per week on three separate calendar days.These samples shall be representative of
the wastewater discharged during the sample period.
Act or"the Act"
The Federal Water Pollution Control Act,also known as the Clean Water Act(CWA),as amended,33 USC 1251,et.
seq.
Annual Average
The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar year. In the case of fecal
coliform,the geometric mean of such discharges.
Arithmetic Mean
The summation of the individual values divided by the number of individual values.
Bypass
The known diversion of waste streams from any portion of a treatment facility including the collection system,which is
not a designed or established or operating mode for the facility.
Calendar Day
The period from midnight of one day until midnight of the next day.However,for purposes of this permit,any
consecutive 24-hour period that reasonably represents the calendar day may be used for sampling.
Calendar Week
The period from Sunday through the following Saturday.
Calendar Quarter
One of the following distinct periods: January through March,April through June,July through September,and
October through December.
Composite Sample
A sample collected over a 24-hour period by continuous sampling or combining grab samples of at least 100 mL in
such a manner as to result in a total sample representative of the wastewater discharge during the sample period.The
Director may designate the most appropriate method(specific number and size of aliquots necessary,the time interval
between grab samples,etc.)on a case-by-case basis. Samples may be collected manually or automatically. Composite
samples may be obtained by the following methods:
(1) Continuous: a single,continuous sample collected over a 24-hour period proportional to the rate of flow.
(2) Constant time/variable volume: a series of grab samples collected at equal time intervals over a 24 hour period
of discharge and combined proportional to the rate of flow measured at the time of individual sample
collection, or
(3) Variable time/constant volume: a series of grab samples of equal volume collected over a 24 hour period with
the time intervals between samples determined by a preset number of gallons passing the sampling point. Flow
measurement between sample intervals shall be determined by use of a flow recorder and totalizer,and the
preset gallon interval between sample collection fixed at no greater than 1/24 of the expected total daily flow at
the treatment system, or
Version 11/09/2011.2

NPDES Permit Standard Conditions
Page 2 of 18
(4) Constant time/constant volume: a series of grab samples of equal volume collected over a 24-hour period at a
constant time interval.Use of this method requires prior approval by the Director. This method may only be
used in situations where effluent flow rates vary less than 15 percent.The following restrictions also apply:
> Influent and effluent grab samples shall be of equal size and of no less than 100 milliliters
> Influent samples shall not be collected more than once per hour.
> Permittees with wastewater treatment systems whose detention time<24 hours shall collect effluent grab
samples at intervals of no greater than 20 minutes apart during any 24-hour period.
> Permittees with wastewater treatment systems whose detention time exceeds 24 hours shall collect effluent
grab samples at least every six hours;there must be a minimum of four samples during a 24-hour sampling
period.
Continuous flow measurement
Flow monitoring that occurs without interruption throughout the operating hours of the facility.Flow shall be
monitored continually except for the infrequent times when there may be no flow or for infrequent maintenance
activities on the flow device.
Daily Discharge
The discharge of a pollutant measured during a calendar day or any 24-hour period that reasonably represents the
calendar day for purposes of sampling.For pollutants measured in units of mass,the"daily discharge" is calculated as
the total mass of the pollutant discharged over the day.For pollutants expressed in other units of measurement,the
"daily discharge"is calculated as the average measurement of the pollutant over the day. (40 CFR 122.2; see also
"Composite Sample,"above.)
Daily Maximum
The highest"daily discharge"during the calendar month.
Daily Sampling
Parameters requiring daily sampling shall be sampled 5 out of every 7 days per week unless otherwise specified in the
permit. Sampling shall be conducted on weekdays except where holidays or other disruptions of normal operations
prevent weekday sampling.If sampling is required for all seven days of the week for any permit parameter(s),that
requirement will be so noted on the Effluent Limitations and Monitoring Page(s).
DWR or"the Division"
The Division of Water Resources,Department of Environmental Quality.
Effluent
Wastewater discharged following all treatment processes from a water pollution control facility or other point source
whether treated or untreated.
EMC
The North Carolina Environmental Management Commission
EPA
The United States Environmental Protection Agency
Facility Closure
Cessation of all activities that require coverage under this NPDES permit. Completion of facility closure will allow this
permit to be rescinded.
Geometric Mean
The Nth root of the product of the individual values where N=the number of individual values.For purposes of
calculating the geometric mean,values of"0"(or"<[detection level]")shall be considered= 1.
Grab Sample
Individual samples of at least 100 mL collected over a period of time not exceeding 15 minutes. Grab samples can be
collected manually. Grab samples must be representative of the discharge(or the receiving stream,for instream
samples).
Version 11/09/2011.2

NPDES Permit Standard Conditions
Page 3 of 18
Hazardous Substance
Any substance designated under 40 CFR Part 116 pursuant to Section 311 of the CWA.
Instantaneous flow measurement
The flow measured during the minimum time required for the flow measuring device or method to produce a result in
that instance.To the extent practical,instantaneous flow measurements coincide with the collection of any grab
samples required for the same sampling period so that together the samples and flow are representative of the discharge
during that sampling period.
Monthly Average(concentration limit)
The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar month.In the case of fecal
coliform or other bacterial parameters or indicators,the geometric mean of such discharges.
Permit Issuing Authority
The Director of the Division of Water Resources.
Quarterly Average(concentration limit)
The arithmetic mean of all samples taken over a calendar quarter.
Severe property damage
Substantial physical damage to property,damage to the treatment facilities which causes them to become inoperable,or
substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a
bypass. Severe property damage excludes economic loss caused by delays in production.
Toxic Pollutant:
Any pollutant listed as toxic under Section 307(a)(1)of the CWA.
Upset
An incident beyond the reasonable control of the Permittee causing unintentional and temporary noncompliance with
permit effluent limitations and/or monitoring requirements. An upset does not include noncompliance caused by
operational error,improperly designed treatment facilities,inadequate treatment facilities,lack of preventive
maintenance,or careless or improper operation.
Weekly Average(concentration limit)
The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar week.In the case of fecal
coliform or other bacterial parameters or indicators,the geometric mean of such discharges.
Section B. General Conditions
1. Duty to Comply
The Permittee must comply with all conditions of this permit.Any permit noncompliance constitutes a violation of
the CWA and is grounds for enforcement action; for permit termination,revocation and reissuance,or
modification;or denial of a permit renewal application [40 CFR 122.41].
a. The Permittee shall comply with effluent standards or prohibitions established under section 307(a)of the
CWA for toxic pollutants and with standards for sewage sludge use or disposal established under section
405(d)of the CWA within the time provided in the regulations that establish these standards or prohibitions or
standards for sewage sludge use or disposal,even if the permit has not yet been modified to incorporate the
requirement.
b. The CWA provides that any person who violates section[s] 301,302, 306,307,308,318 or 405 of the Act, or
any permit condition or limitation implementing any such sections in a permit issued under section 402, or any
requirement imposed in a pretreatment program approved under sections 402(a)(3)or 402(b)(8)of the Act,is
subject to a civil penalty not to exceed$37,500 per day for each violation. [33 USC 1319(d)and 40 CFR
122.41(a)(2)]
c. The CWA provides that any person who negligently violates sections 301,302,306,307,308,318,or 405 of
the Act,or any condition or limitation implementing any of such sections in a permit issued under section 402
of the Act,or any requirement imposed in a pretreatment program approved under section 402(a)(3) or
402(b)(8) of the Act,is subject to criminal penalties of$2,500 to$25,000 per day of violation,or
Version 11/09/2011.2

NPDES Permit Standard Conditions
Page 4 of 18
imprisonment of not more than 1 year,or both.In the case of a second or subsequent conviction for a negligent
violation,a person shall be subject to criminal penalties of not more than$50,000 per day of violation,or by
imprisonment of not more than 2 years,or both. [33 USC 1319(c)(1)and 40 CFR 122.41(a)(2)]
d. Any person who knowingly violates such sections,or such conditions or limitations is subject to criminal
penalties of$5,000 to$50,000 per day of violation,or imprisonment for not more than 3 years, or both. In the
case of a second or subsequent conviction for a knowing violation,a person shall be subject to criminal
penalties of not more than$100,000 per day of violation,or imprisonment of not more than 6 years, or both.
[33 USC 1319(c)(2)and 40 CFR 122.41(a)(2)]
e. Any person who knowingly violates section 301,302,303,306,307,308,318 or 405 of the Act,or any permit
condition or limitation implementing any of such sections in a permit issued under section 402 of the Act,and
who knows at that time that he thereby places another person in imminent danger of death or serious bodily
injury, shall,upon conviction,be subject to a fine of not more than$250,000 or imprisonment of not more than
15 years,or both.In the case of a second or subsequent conviction for a knowing endangerment violation,a
person shall be subject to a fine of not more than$500,000 or by imprisonment of not more than 30 years,or
both.An organization, as defined in section 309(c)(3)(B)(iii)of the CWA,shall,upon conviction of violating
the imminent danger provision,be subject to a fine of not more than$1,000,000 and can be fined up to
$2,000,000 for second or subsequent convictions. [40 CFR 122.41(a)(2)]
f. Under state law, a civil penalty of not more than$25,000 per violation may be assessed against any person
who violates or fails to act in accordance with the terms,conditions, or requirements of a permit. [North
Carolina General Statutes § 143-215.6A]
g. Any person may be assessed an administrative penalty by the Administrator for violating section 301,302,
306,307,308,318 or 405 of this Act,or any permit condition or limitation implementing any of such sections
in a permit issued under section 402 of this Act.Administrative penalties for Class I violations are not to
exceed$16,000 per violation,with the maximum amount of any Class I penalty assessed not to exceed
$37,500.Penalties for Class II violations are not to exceed$16,000 per day for each day during which the
violation continues,with the maximum amount of any Class II penalty not to exceed$177,500. [33 USC
1319(g)(2)and 40 CFR 122.41(a)(3)]
2. Duty to Mitigate
The Permittee shall take all reasonable steps to minimize or prevent any discharge or sludge use or disposal in
violation of this permit with a reasonable likelihood of adversely affecting human health or the environment[40
CFR 122.41(d)].
3. Civil and Criminal Liability
Except as provided in permit conditions on "Bypassing" (Part II.C.4),"Upsets"(Part II.C.5)and"Power Failures"
(Part II.C.7),nothing in this permit shall be construed to relieve the Permittee from any responsibilities, liabilities,
or penalties for noncompliance pursuant to NCGS 143-215.3, 143-215.6 or Section 309 of the Federal Act,33 USC
1319.Furthermore,the Permittee is responsible for consequential damages,such as fish kills,even though the
responsibility for effective compliance may be temporarily suspended.
4. Oil and Hazardous Substance Liability
Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the Permittee
from any responsibilities, liabilities,or penalties to which the Permittee is or may be subject to under NCGS 143-
215.75 et seq. or Section 311 of the Federal Act,33 USG 1321.Furthermore,the Permittee is responsible for
consequential damages, such as fish kills,even though the responsibility for effective compliance may be
temporarily suspended.
5. Property Rights
The issuance of this permit does not convey any property rights in either real or personal property, or any exclusive
privileges,nor does it authorize any injury to private property or any invasion of personal rights,nor any
infringement of Federal, State or local laws or regulations [40 CFR 122.41(g)].
6. Onshore or Offshore Construction
This permit does not authorize or approve the construction of any onshore or offshore physical structures or
facilities or the undertaking of any work in any navigable waters.
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7. Severability
The provisions of this permit are severable.If any provision of this permit,or the application of any provision of
this permit to any circumstances,is held invalid,the application of such provision to other circumstances,and the
remainder of this permit,shall not be affected thereby [NCGS 150B-23].
8. Duty to Provide Information
The Permittee shall furnish to the Permit Issuing Authority,within a reasonable time,any information which the
Permit Issuing Authority may request to determine whether cause exists for modifying,revoking and reissuing,or
terminating this permit or to determine compliance with this permit.The Permittee shall also furnish to the Permit
Issuing Authority upon request,copies of records required by this permit[40 CFR 122.41(h)].
9. Duty to Reapply
If the Permittee wishes to continue an activity regulated by this permit after the expiration date of this permit,the
Permittee must apply for and obtain a new permit[40 CFR 122.41(b)].
10. Expiration of Permit
The Permittee is not authorized to discharge after the expiration date.In order to receive automatic authorization to
discharge beyond the expiration date,the Permittee shall submit such information,forms,and fees as are required
by the agency authorized to issue permits no later than 180 days prior to the expiration date unless permission for a
later date has been granted by the Director. (The Director shall not grant permission for applications to be
submitted later than the expiration date of the existing permit.) [40 CFR 122.21(d)] Any Permittee that has not
requested renewal at least 180 days prior to expiration,or any Permittee that does not have a permit after the
expiration and has not requested renewal at least 180 days prior to expiration,will subject the Permittee to
enforcement procedures as provided in NCGS 143-215.6 and 33 USC 1251 et. seq.
11. Signatory Requirements
All applications,reports,or information submitted to the Permit Issuing Authority shall be signed and certified [40
CFR 122.41(k)].
a. All permit applications shall be signed as follows:
(1) For a corporation: by a responsible corporate officer.For the purpose of this Section,a responsible
corporate officer means: (a)a president,secretary,treasurer or vice president of the corporation in charge
of a principal business function, or any other person who performs similar policy or decision making
functions for the corporation,or(b)the manager of one or more manufacturing,production,or operating
facilities,provided,the manager is authorized to make management decisions which govern the operation
of the regulated facility including having the explicit or implicit duty of making major capital investment
recommendations, and initiating and directing other comprehensive measures to assure long term
environmental compliance with environmental laws and regulations;the manager can ensure that the
necessary systems are established or actions taken to gather complete and accurate information for permit
application requirements; and where authority to sign documents has been assigned or delegated to the
manager in accordance with corporate procedures .
(2) For a partnership or sole proprietorship: by a general partner or the proprietor,respectively;or
(3) For a municipality, State,Federal,or other public agency: by either a principal executive officer or
ranking elected official [40 CFR 122.22].
b. All reports required by the permit and other information requested by the Permit Issuing Authority shall be
signed by a person described in paragraph a. above or by a duly authorized representative of that person.A
person is a duly authorized representative only if:
(1) The authorization is made in writing by a person described above;
(2) The authorization specified either an individual or a position having responsibility for the overall operation
of the regulated facility or activity, such as the position of plant manager,operator of a well or well field,
superintendent, a position of equivalent responsibility, or an individual or position having overall
responsibility for environmental matters for the company. (A duly authorized representative may thus be
either a named individual or any individual occupying a named position.);and
(3) The written authorization is submitted to the Permit Issuing Authority [40 CFR 122.22]
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c. Changes to authorization:If an authorization under paragraph(b)of this section is no longer accurate because
a different individual or position has responsibility for the overall operation of the facility,a new authorization
satisfying the requirements of paragraph(b)of this section must be submitted to the Director prior to or
together with any reports,information,or applications to be signed by an authorized representative [40 CFR
122.22]
d. Certification.Any person signing a document under paragraphs a. or b. of this section 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."
12. Permit Actions
This permit may be modified,revoked and reissued,or terminated for cause.The filing of a request by the
Permittee for a permit modification,revocation and reissuance,or termination,or a notification of planned changes
or anticipated noncompliance does not stay any permit condition[40 CFR 122.41(f)].
13. Permit Modification,Revocation and Reissuance,or Termination
The issuance of this permit does not prohibit the permit issuing authority from reopening and modifying the permit,
revoking and reissuing the permit, or terminating the permit as allowed by the laws,rules,and regulations
contained in Title 40,Code of Federal Regulations,Parts 122 and 123;Title 15A of the North Carolina
Administrative Code, Subchapter 02H.0100;and North Carolina General Statute 143.215.1 et. al.
14. Annual Administering and Compliance Monitoring Fee Requirements
The Permittee must pay the annual administering and compliance monitoring fee within thirty days after being
billed by the Division.Failure to pay the fee in a timely manner in accordance with 15A NCAC 02H .0105(b)(2)
may cause this Division to initiate action to revoke the permit.
Section C. Operation and Maintenance of Pollution Controls
1. Certified Operator
Owners of classified water pollution control systems must designate operators,certified by the Water Pollution
Control System Operators Certification Commission(WPCSOCC),of the appropriate type and grade for the
system, and,for each classification must[T15A NCAC 08G .0201]:
a. designate one Operator In Responsible Charge(ORC)who possesses a valid certificate of the type and grade at
least equivalent to the type and grade of the system;
b. designate one or more Back-up Operator(s) in Responsible Charge(Back-up ORCs)who possesses a valid
certificate of the type of the system and no more than one grade less than the grade of the system,with the
exception of no backup operator in responsible charge is required for systems whose minimum visitation
requirements are twice per year; and
c. submit a signed completed"Water Pollution Control System Operator Designation Form" to the Commission
(or to the local health department for owners of subsurface systems)countersigned by the designated certified
operators,designating the Operator in Responsible Charge(ORC)and the Back-up Operator in Responsible
Charge(Back-up ORC):
(1) 60 calendar days prior to wastewater or residuals being introduced into a new system; or
(2) within 120 calendar days following:
> receiving notification of a change in the classification of the system requiring the designation of a new
Operator in Responsible Charge(ORC)and Back-up Operator in Responsible Charge(Back-up ORC)
of the proper type and grade; or
➢ a vacancy in the position of Operator in Responsible Charge(ORC)or Back-up Operator in
Responsible Charge(Back-up ORC).
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F (3) within seven calendar days of vacancies in both ORC and Back-up ORC positions replacing or designating
at least one of the responsibilities.
The ORC of each Class I facility(or the Back-up ORC,when acting as surrogate for the ORC)must:
> Visit the facility as often as is necessary to insure proper operation of the treatment system;the treatment
facility must be visited at least weekly
> Comply with all other conditions of 15A NCAC 08G .0204.
The ORC of each Class II,III and IV facility(or the Back-up ORC,when acting as surrogate for the ORC)must:
> Visit the facility as often as is necessary to insure proper operation of the treatment system;the treatment
facility must be visited at least five days per week,excluding holidays
> Properly manage and document daily operation and maintenance of the facility
> Comply with all other conditions of 15A NCAC 08G.0204.
2. Proper Operation and Maintenance
The Permittee shall at all times properly operate and maintain all facilities and systems of treatment and control
(and related appurtenances)which are installed or used by the Permittee to achieve compliance with the conditions
of this permit.Proper operation and maintenance also includes adequate laboratory controls and appropriate quality
assurance procedures.This provision requires the Permittee to install and operate backup or auxiliary facilities only
when necessary to achieve compliance with the conditions of the permit[40 CFR 122.41(e)].
NOTE: Properly and officially designated operators are fully responsible for all proper operation and maintenance
of the facility,and all documentation required thereof,whether acting as a contract operator[subcontractor] or a
member of the Permittee's staff.
3. Need to Halt or Reduce not a Defense
It shall not be a defense for a Permittee in an enforcement action that it would have been necessary to halt or
reduce the permitted activity in order to maintain compliance with the condition of this permit[40 CFR 122.41(c)].
4. Bypassing of Treatment Facilities
a. Bypass not exceeding limitations [40 CFR 122.41(m)(2)]
The Permittee may allow any bypass to occur which does not cause effluent limitations to be exceeded,but
only if it also is for essential maintenance to assure efficient operation.These bypasses are not subject to the
provisions of Paragraphs b. and c. of this section.
b. Notice [40 CFR 122.41(m)(3)]
(1) Anticipated bypass.If the Permittee knows in advance of the need for a bypass,it shall submit prior notice,
if possible at least ten days before the date of the bypass; including an evaluation of the anticipated quality
and effect of the bypass.
(2) Unanticipated bypass.The Permittee shall submit notice of an unanticipated bypass as required in Part
II.E.6. (24-hour notice).
c. Prohibition of Bypass
(1) Bypass from the treatment facility is prohibited and the Permit Issuing Authority may take enforcement
action against a Permittee for bypass,unless:
(A) Bypass was unavoidable to prevent loss of life,personal injury or severe property damage;
(B) There were no feasible alternatives to the bypass,such as the use of auxiliary treatment facilities,
retention of untreated wastes or maintenance during normal periods of equipment downtime. This
condition is not satisfied if adequate backup equipment should have been installed in the exercise of
reasonable engineering judgment to prevent a bypass which occurred during normal periods of
equipment downtime or preventive maintenance;and
(C) The Permittee submitted notices as required under Paragraph b. of this section.
(2) Bypass from the collection system is prohibited and the Permit Issuing Authority may take enforcement
action against a Permittee for a bypass as provided in any current or future system-wide collection system
permit associated with the treatment facility.
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(3) The Permit Issuing Authority may approve an anticipated bypass, after considering its adverse effects,if
the Permit Issuing Authority determines that it will meet the three conditions listed above in Paragraph c.
(1)of this section.
5. Upsets
a. Effect of an upset[40 CFR 122.41(n)(2)]: An upset constitutes an affirmative defense to an action brought for
noncompliance with such technology based permit effluent limitations if the requirements of paragraph b. of
this condition are met.No determination made during administrative review of claims that noncompliance was
caused by upset,and before an action for noncompliance, is fmal administrative action subject to judicial
review.
b. Conditions necessary for a demonstration of upset:Any Permittee who wishes to establish the affirmative
defense of upset shall demonstrate,through properly signed,contemporaneous operating logs,or other relevant
evidence that:
(1)An upset occurred and that the Permittee can identify the cause(s)of the upset;
(2)The Permittee facility was at the time being properly operated;and
(3)The Permittee submitted notice of the upset as required in Part II.E.6.(b)of this permit.
(4)The Permittee complied with any remedial measures required under Part II.B.2. of this permit.
c. Burden of proof[40 CFR 122.41(n)(4)]: The Permittee seeking to establish the occurrence of an upset has
the burden of proof in any enforcement proceeding.
6. Removed Substances
Solids,sludges,filter backwash,or other pollutants removed in the course of treatment or control of wastewaters
shall be utilized/disposed of in accordance with NCGS 143-215.1 and in a manner such as to prevent any pollutant
from such materials from entering waters of the State or navigable waters of the United States except as permitted
by the Commission.The Permittee shall comply with all applicable state and Federal regulations governing the
disposal of sewage sludge,including 40 CFR 503, Standards for the Use and Disposal of Sewage Sludge;40 CFR
Part 258,Criteria For Municipal Solid Waste Landfills;and 15A NCAC Subchapter 2T,Waste Not Discharged To
Surface Waters.The Permittee shall notify the Permit Issuing Authority of any significant change in its sludge use
or disposal practices.
7. Power Failures
The Permittee is responsible for maintaining adequate safeguards(as required by 15A NCAC 02H.0124)to
prevent the discharge of untreated or inadequately treated wastes during electrical power failures either by means
of alternate power sources,standby generators or retention of inadequately treated effluent.
Section D. Monitoring and Records
1. Representative Sampling
Samples collected and measurements taken,as required herein,shall be representative of the permitted discharge.
Samples collected at a frequency less than daily shall be taken on a day and time that is representative of the
discharge for the period the sample represents.All samples shall be taken at the monitoring points specified in this
permit and,unless otherwise specified,before the effluent joins or is diluted by any other wastestream,body of
water,or substance.Monitoring points shall not be changed without notification to and the approval of the Permit
Issuing Authority [40 CFR 122.41(j)].
2. Reporting
Monitoring results obtained during the previous month(s)shall be summarized for each month and reported on a
monthly Discharge Monitoring Report(DMR)Form(MR 1, 1.1,2,3)or alternative forms approved by the
Director,postmarked no later than the last calendar day of the month following the completed reporting period.
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. Duplicate signed copies of these,
and all other reports required herein, shall be submitted to the following address:
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NC DEQ/Division of Water Resources/Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
3. Flow Measurements
Appropriate flow measurement devices and methods consistent with accepted scientific practices shall be selected
and used to ensure the accuracy and reliability of measurements of the volume of monitored discharges.The
devices shall be installed,calibrated and maintained to ensure that the accuracy of the measurements is consistent
with the accepted capability of that type of device. Devices selected shall be capable of measuring flows with a
maximum deviation of less than 10%from the true discharge rates throughout the range of expected discharge
volumes. Flow measurement devices shall be accurately calibrated at a minimum of once per year and maintained
to ensure that the accuracy of the measurements is consistent with the accepted capability of that type of device.
The Director shall approve the flow measurement device and monitoring location prior to installation.
Once-through condenser cooling water flow monitored by pump logs,or pump hour meters as specified in Part I of
this permit and based on the manufacturer's pump curves shall not be subject to this requirement.
4. Test Procedures
Laboratories used for sample analysis must be certified by the Division.Permittees should contact the Division's
Laboratory Certification Section(919 733-3908)or visit https://deq.nc.gov/about/divisions/water-resources/water-
resources-data/water-sciences-home-page/laboratory-certification-branch for information regarding laboratory
certifications.
Facilities whose personnel are conducting testing of field-certified parameters only must hold the appropriate field
parameter laboratory certifications.
Test procedures for the analysis of pollutants shall conform to the EMC regulations(published pursuant to NCGS
143-215.63 et. seq.),the Water and Air Quality Reporting Acts,and to regulations published pursuant to Section
304(g),33 USC 1314,of the CWA(as amended),and 40 CFR 136; or in the case of sludge use or disposal,
approved under 40 CFR 136,unless otherwise specified in 40 CFR 503,unless other test procedures have been
specified in this permit[40 CFR 122.41].
To meet the intent of the monitoring required by this permit mil test procedures must produce minimum detection
and reporting levels that are below the permit discharge requirements and all data generated must be reported down
to the minimum detection or lower reporting level of the procedure. If no approved methods are determined
capable of achieving minimum detection and reporting levels below permit discharge requirements,then the most
sensitive(method with the lowest possible detection and reporting level)approved method must be used.
5. Penalties for Tampering
The CWA provides that any person who falsifies,tampers with,or knowingly renders inaccurate,any monitoring
device or method required to be maintained under this permit shall,upon conviction,be punished by a fine of not
more than$10,000 per violation,or by imprisonment for not more than two years per violation, or by both. If a
conviction of a person is for a violation committed after a first conviction of such person under this paragraph,
punishment is a fine of not more than$20,000 per day of violation,or by imprisonment of not more than 4 years,
or both[40 CFR 122.41].
6. Records Retention
Except for records of monitoring information required by this permit related to the Permittee's sewage sludge use
and disposal activities,which shall be retained for a period of at least five years(or longer as required by 40 CFR
503),the Permittee shall retain records of all monitoring information,including:
➢ all calibration and maintenance records
➢ all original strip chart recordings for continuous monitoring instrumentation
➢ copies of all reports required by this permit
➢ copies of all data used to complete the application for this permit
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These records or copies shall be maintained for a period of at least 3 years from the date of the sample,
measurement,report or application.This period may be extended by request of the Director at any time [40 CFR
122.41].
7. Recording Results
For each measurement or sample taken pursuant to the requirements of this permit,the Permittee shall record the
following information[40 CFR 122.41]:
a. The date,exact place,and time of sampling or measurements;
b. The individual(s)who performed the sampling or measurements;
c. The date(s)analyses were performed;
d. The individual(s)who performed the analyses;
e. The analytical techniques or methods used;and
f. The results of such analyses.
8. Inspection and Entry
The Permittee shall allow the Director,or an authorized representative(including an authorized contractor acting as
a representative of the Director),upon the presentation of credentials and other documents as may be required by
law,to;
a. Enter,at reasonable times,upon the Permittee's premises where a regulated facility or activity is located or
conducted,or where records must be kept under the conditions of this permit;
b. Have access to and copy,at reasonable times,any records that must be kept under the conditions of this permit;
c. Inspect at reasonable times any facilities,equipment(including monitoring and control equipment),practices,
or operations regulated or required under this permit; and
d. Sample or monitor at reasonable times,for the purposes of assuring permit compliance or as otherwise
authorized by the CWA,any substances or parameters at any location[40 CFR 122.41(i)].
Section E Reporting Requirements
1. Change in Discharge
All discharges authorized herein shall be consistent with the terms and conditions of this permit.The discharge of
any pollutant identified in this permit more frequently than or at a level in excess of that authorized shall constitute
a violation of the permit.
2. Planned Changes
The Permittee shall give notice to the Director as soon as possible of any planned physical alterations or additions
to the permitted facility [40 CFR 122.41(1)].Notice is required only when:
a. The alteration or addition to a permitted facility may meet one of the criteria for new sources at 40 CFR
122.29(b);or
b. The alteration or addition could significantly change the nature or increase the quantity of pollutants
discharged.This notification applies to pollutants subject neither to effluent limitations in the permit,nor to
notification requirements under 40 CFR 122.42(a)(1); or
c. The alteration or addition results in a significant change in the Permittee's sludge use or disposal practices, and
such alteration,addition or change may justify the application of permit conditions that are different from or
absent in the existing permit,including notification of additional use or disposal sites not reported during the
permit application process or not reported pursuant to an approved land application plan.
3. Anticipated Noncompliance
The Permittee shall give advance notice to the Director of any planned changes to the permitted facility or other
activities that might result in noncompliance with the permit[40 CFR 122.41(1)(2)].
4. Transfers
This permit is not transferable to any person without prior written notice to and approval from the Director in
accordance with 40 CFR 122.61.The Director may condition approval in accordance with NCGS 143-215.1,in
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particular NCGS 143-215.1(b)(4)b.2.,and may require modification or revocation and reissuance of the permit, or
a minor modification,to identify the new permittee and incorporate such other requirements as may be necessary
under the CWA [40 CFR 122.41(1)(3), 122.61] or state statute.
5. Monitoring Reports
Monitoring results shall be reported at the intervals specified elsewhere in this permit[40 CFR 122.41(1)(4)].
a. Monitoring results must be reported on a Discharge Monitoring Report(DMR)(See Part II.D.2)or forms
provided by the Director for reporting results of monitoring of sludge use or disposal practices.
b. If the Permittee monitors any pollutant more frequently than required by this permit using test procedures
approved under 40 CFR Part 136 and at a sampling location specified in this permit or other appropriate
instrument governing the discharge,the results of such monitoring shall be included in the calculation and
reporting of the data submitted on the DMR.
6. Twenty-four Hour Reporting
a. The Permittee shall report to the Director or the appropriate Regional Office any noncompliance that
potentially threatens public health or the environment. Any information shall be provided orally within 24
hours from the time the Permittee became aware of the circumstances.A written submission shall also be
provided within 5 days of the time the Permittee becomes aware of the circumstances.The written submission
shall contain a description of the noncompliance,and its cause;the period of noncompliance, including exact
dates and times, and if the noncompliance has not been corrected,the anticipated time it is expected to
continue; and steps taken or planned to reduce,eliminate, and prevent reoccurrence of the noncompliance [40
CFR 122.41(1)(6)].
b. The Director may waive the written report on a case-by-case basis for reports under this section if the oral
report has been received within 24 hours.
c. Occurrences outside normal business hours may also be reported to the Division's Emergency Response
personnel at(800) 858-0368 or(919)733-3300.
7. Other Noncompliance
The Permittee shall report all instances of noncompliance not reported under Part II.E.5 and 6. of this permit at the
time monitoring reports are submitted. The reports shall contain the information listed in Part II.E.6.of this permit
[40 CFR 122.41(1)(7)].
8. Other Information
Where the Permittee becomes aware that it failed to submit any relevant facts in a permit application,or submitted
incorrect information in a permit application or in any report to the Director, it shall promptly submit such facts or
information [40 CFR 122.41(1)(8)].
9. Noncompliance Notification
The Permittee shall report by telephone to either the central office or the appropriate regional office of the Division
as soon as possible,but in no case more than 24 hours or on the next working day following the occurrence or first
knowledge of the occurrence of any of the following:
a. Any occurrence at the water pollution control facility which results in the discharge of significant amounts of
wastes which are abnormal in quantity or characteristic,such as the dumping of the contents of a sludge
digester;the known passage of a slug of hazardous substance through the facility; or any other unusual
circumstances.
b. Any process unit failure,due to known or unknown reasons,that render the facility incapable of adequate
wastewater treatment such as mechanical or electrical failures of pumps,aerators,compressors, etc.
c. Any failure of a pumping station,sewer line, or treatment facility resulting in a by-pass without treatment of all
or any portion of the influent to such station or facility.
Persons reporting such occurrences by telephone shall also file a written report within 5 days following first
knowledge of the occurrence.Also see reporting requirements for municipalities in Part IV.C.2.c. of this permit.
10. Availability of Reports
Except for data determined to be confidential under NCGS 143-215.3 (a)(2)or Section 308 of the Federal Act,33
USC 1318,all reports prepared in accordance with the terms shall be available for public inspection at the offices
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of the Division. As required by the Act, effluent data shall not be considered confidential.Knowingly making any
false statement on any such report may result in the imposition of criminal penalties as provided for in NCGS 143-
215.1(b)(2)or in Section 309 of the Federal Act.
11. Penalties for Falsification of Reports
The CWA provides that any person who knowingly makes any false statement,representation,or certification in
any record or other document submitted or required to be maintained under this permit, including monitoring
reports or reports of compliance or noncompliance shall,upon conviction,be punished by a fine of not more than
$25,000 per violation,or by imprisonment for not more than two years per violation,or by both[40 CFR 122.41].
12. Annual Performance Reports
Permittees who own or operate facilities that primarily collect or treat municipal or domestic wastewater and have
an average annual flow greater than 200,000 gallons per day shall provide an annual report to the Permit Issuing
Authority and to the users/customers served by the Permittee(NCGS 143-215.1C).The report shall summarize the
performance of the collection or treatment system, as well as the extent to which the facility was compliant with
applicable Federal or State laws,regulations and rules pertaining to water quality.The report shall be provided no
later than sixty days after the end of the calendar or fiscal year,depending upon which annual period is used for
evaluation.
The report shall be sent to:
NC DEQ/Division of Water Resources/Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
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PART III
OTHER REQUIREMENTS
Section A. Construction
a. The Permittee shall not commence construction of wastewater treatment facilities,nor add to the plant's treatment
capacity,nor change the treatment process(es)utilized at the treatment plant unless(1)the Division has issued an
Authorization to Construct(AtC)permit or(2)the Permittee is exempted from such AtC permit requirements
under Item b. of this Section.
b. In accordance with NCGS 143-215.1(a5) [SL 2011-394],no permit shall be required to enter into a contract for the
construction,installation,or alteration of any treatment work or disposal system or to construct, install,or alter any
treatment works or disposal system within the State when the system's or work's principle function is to conduct,
treat,equalize,neutralize, stabilize,recycle,or dispose of industrial waste or sewage from an industrial facility and
the discharge of the industrial waste or sewage is authorized under a permit issued for the discharge of the
industrial waste or sewage into the waters of the State. Notwithstanding the above,the permit issued for the
discharge may be modified if required by federal regulation.
c. Issuance of an AtC will not occur until Final Plans and Specifications for the proposed construction have been
submitted by the Permittee and approved by the Division.
Section B. Groundwater Monitoring
The Permittee shall,upon written notice from the Director,conduct groundwater monitoring as may be required to
determine the compliance of this NPDES permitted facility with the current groundwater standards.
Section C. Changes in Discharges of Toxic Substances
The Permittee shall notify the Permit Issuing Authority as soon as it knows or has reason to believe(40 CFR 122.42):
a. That any activity has occurred or will occur which would result in the discharge,on a routine or frequent basis,of
any toxic pollutant which is not limited in the permit, if that discharge will exceed the highest of the following
"notification levels";
(1) One hundred micrograms per liter(100 µg/L);
(2) Two hundred micrograms per liter(200 µg/L)for acrolein and acrylonitrile; five hundred micrograms per liter
(500 µg/L)for 2,4-dinitrophenol and for 2-methyl-4,6-dinitrophenol; and one milligram per liter(1 mg/L)for
antimony;
(3) Five times the maximum concentration value reported for that pollutant in the permit application.
b. That any activity has occurred or will occur which would result in any discharge,on a non-routine or infrequent
basis,of a toxic pollutant which is not limited in the permit,if that discharge will exceed the highest of the
following"notification levels";
(1) Five hundred micrograms per liter(500 µg/L);
(2) One milligram per liter(1 mg/L)for antimony;
(3) Ten times the maximum concentration value reported for that pollutant in the permit application.
Section D. Facility Closure Requirements
The Permittee must notify the Division at least 90 days prior to the closure of any wastewater treatment system covered
by this permit. The Division may require specific measures during deactivation of the system to prevent adverse
impacts to waters of the State.This permit cannot be rescinded while any activities requiring this permit continue at the
permitted facility.
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.,
PART IV
SPECIAL CONDITIONS FOR MUNICIPAL FACILITIES
Section A. Definitions
In addition to the definitions in Part II of this permit,the following definitions apply to municipal facilities:
Indirect Discharge or Industrial User
Any non-domestic source that discharges wastewater containing pollutants into a POTW regulated under section
307(b), (c)or(d)of the CWA. [40 CFR 403.3 (i)and(j)and 15A NCAC 02H.0903(b)(11)]
Interference
Inhibition or disruption of the POTW treatment processes; operations; or its sludge process,use,or disposal which
causes or contributes to a violation of any requirement of the Permittee's(or any satellite POTW's if different from the
Permittee)NPDES,collection system, or non-discharge permit or prevents sewage sludge use or disposal in
compliance with specified applicable State and Federal statutes,regulations,or permits. [15A NCAC 02H
.0903(b)(14)]
Pass Through
A discharge which exits the POTW into waters of the State in quantities or concentrations which,alone or with
discharges from other sources,causes a violation, including an increase in the magnitude or duration of a violation, of
the Permittee's(or any satellite POTW's,if different from the Permittee)NPDES,collection system, or non-discharge
permit. [15A NCAC 02H .0903(b)(23)]
Publicly Owned Treatment Works(POTW)
A treatment works as defined by Section 212 of the CWA,which is owned by a State or local government organization.
This definition includes any devices and systems used in the storage,treatment,recycling and reclamation of municipal
sewage or industrial wastes of a liquid nature. It also includes the collection system,as defined in 15A NCAC 2T
.0402,only if it conveys wastewater to a POTW treatment plant.The term also means the local government
organization,or municipality,as defined in section 502(4)of the CWA,which has jurisdiction over indirect discharges
to and the discharges from such a treatment works.In this context,the organization may be the owner of the POTW
treatment plant or the owner of the collection system into which an indirect discharger discharges.This second type of
POTW may be referred to as a"satellite POTW organization." [15A NCAC 02H.0903(b)(26)]
"Significant Industrial User" or"SIU"
An Industrial User that discharges wastewater into a publicly owned treatment works and that[15A NCAC 0214
.0903(b)(33)]:
1. Discharges an average of 25,000 gallons per day or more of process wastewater to the POTW(excluding sanitary,
noncontact cooling and boiler blowdown wastewaters); or
2. Contributes process wastewater which makes up five percent or more of the NPDES or non-discharge permitted
flow limit or organic capacity of the POTW treatment plant. In this context,organic capacity refers to BOD,TSS
and ammonia; or
3. Is subject to categorical standards under 40 CFR Part 403.6 and 40 CFR Parts 405-471; or
4. Is designated as such by the Permittee on the basis that the Industrial User has a reasonable potential for adversely
affecting the POTW's operation or for violating any pretreatment standard or requirement,or the POTW's effluent
limitations and conditions in its NPDES or non-discharge permit,or to limit the POTW's sludge disposal options;
5. Subject to approval under 15A NCAC 02H.0907(b),the Permittee may determine that an Industrial User meeting
the criteria in paragraphs 1 or 2 of this definition above has no reasonable potential for adversely affecting the
POTW's operation or for violating any pretreatment standard or requirement,the POTW's effluent limitations and
conditions in its NPDES or non-discharge permit, or to limit the POTW's sludge disposal options,and thus is not a
Significant Industrial User(SIU); or
6. Subject to approval under 15A NCAC 02H.0907(b),the Permittee may determine that an Industrial User meeting
the criteria in paragraph 3 of this definition above meets the requirements of 40 CFR Part 403.3(v)(2)and thus is a
non-significant categorical Industrial User.
Section B. Publicly Owned Treatment Works(POTWs)
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All POTWs must provide adequate notice to the Director of the following [40 CFR 122.42(b)]:
1. Any new introduction of pollutants into the POTW from an indirect discharger,regardless of the means of
transport,which would be subject to section 301 or 306 of CWA if it were directly discharging those pollutants;
and
2. Any substantial change in the volume or character of pollutants being introduced by an indirect discharger as
influent to that POTW at the time of issuance of the permit.
3. For purposes of this paragraph,adequate notice shall include information on(1)the quality and quantity of effluent
introduced into the POTW,and(2)any anticipated impact that may result from the change of the quantity or
quality of effluent to be discharged from the POTW.
Section C. Municipal Control of Pollutants from Industrial Users.
1. Effluent limitations are listed in Part I of this permit. Other pollutants attributable to inputs from Industrial Users
discharging to the POTW may be present in the Permittee's discharge.At such time as sufficient information
becomes available to establish limitations for such pollutants,this permit may be revised to specify effluent
limitations for any or all of such other pollutants in accordance with best practicable technology or water quality
standards.
2. Prohibited Discharges
a. The Permittee shall develop and enforce their Pretreatment Program to implement the prohibition against the
introduction of pollutants or discharges into the waste treatment system or waste collection system which
cause or contribute to Pass Through or Interference as defined in 15A NCAC 02H.0900 and 40 CFR 403. [40
CFR 403.5(a)(1)]
b. The Permittee shall develop and enforce their Pretreatment Program to implement the prohibitions against the
introduction of the following wastes in the waste treatment or waste collection system [40 CFR 403.5(b)]:
(1) Pollutants which create a fire or explosion hazard in the POTW, including,but not limited to,
wastestreams with a closed cup flashpoint of less than 140 degrees Fahrenheit or 60 degrees Centigrade
using the test methods specified in 40 CFR 261.21;
(2) Pollutants which cause corrosive structural damage to the POTW,but in no case discharges with pH lower
than 5.0,unless the works is specifically designed to accommodate such discharges;
(3) Solid or viscous pollutants in amounts which cause obstruction to the flow in the POTW resulting in
Interference;
(4) Any pollutant, including oxygen demanding pollutants(BOD, etc.)released in a Discharge at a flow rate
and/or pollutant concentration which will cause Interference with the POTW;
(5) Heat in amounts which will inhibit biological activity in the POTW resulting in Interference,but in no
case heat in such quantities that the temperature at the POTW Treatment Plant exceeds 40°C(104°F)
unless the Division,upon request of the POTW,approves alternate temperature limits;
(6) Petroleum oil,non-biodegradable cutting oil, or products of mineral oil origin in amounts that will cause
Interference or Pass Through;
(7) Pollutants which result in the presence of toxic gases,vapors,or fumes within the POTW in a quantity that
may cause acute worker health and safety problems;or
(8) Any trucked or hauled pollutants,except at discharge points designated by the POTW.
c. The Permittee shall investigate the source of all discharges into the POTW, including slug loads and other
unusual discharges,which have the potential to adversely impact the Permittee's Pretreatment Program and/or
the operation of the POTW.
The Permittee shall report such discharges into the POTW to the Director or the appropriate Regional Office.
Any information shall be provided orally within 24 hours from the time the Permittee became aware of the
circumstances.A written submission shall also be provided within 5 days of the time the Permittee becomes
aware of the circumstances.The written submission shall contain a description of the discharge;the
investigation into possible sources;the period of the discharge,including exact dates and times; if the
discharge has not ceased,the anticipated time it is expected to continue; and steps taken or planned to reduce,
eliminate,and prevent reoccurrence of the noncompliance,
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3. With regard to the effluent requirements listed in Part I of this permit, it may be necessary for the Permittee to
supplement the requirements of the Federal Pretreatment Standards(40 CFR,Part 403)to ensure compliance by
the Permittee with all applicable effluent limitations. Such actions by the Permittee may be necessary regarding
some or all of the industries discharging to the municipal system.
4. The Permittee shall require any Industrial User(IU) discharging to the POTW to meet Federal Pretreatment
Standards developed under Section 307(b) of the Act as amended(which includes categorical standards and
specific local limits,best management practices and narrative requirements).Prior to accepting wastewater from
any Significant Industrial User(SIU),the Permittee shall either develop and submit to the Division a new
Pretreatment Program or,as necessary,a modification of an existing Pretreatment Program, for approval as
required under section D below as well as 15A NCAC 02H .0907(a)and(b). [40 CFR 122.44(j)(2)]
5. This permit shall be modified,or alternatively,revoked and reissued,to incorporate or modify an approved POTW
Pretreatment Program or to include a compliance schedule for the development of a POTW Pretreatment Program
as required under Section 402(b)(8)of the CWA and implementing regulations or by the requirements of the
approved State pretreatment program,as appropriate.
Section D. Pretreatment Programs
Under authority of sections 307 (b)and(c)and 402(b)(8)of the CWA and implementing regulations 40 CFR 403,
North Carolina General Statute 143-215.3(14)and implementing regulations 15A NCAC 02H.0900,and in accordance
with the approved pretreatment program, all provisions and regulations contained and referenced in the pretreatment
program submittal are an enforceable part of this permit. [40 CFR 122.44(j)(2)]
The Permittee shall operate its approved pretreatment program in accordance with Section 402(b)(8)of the CWA,40
CFR 403, 15A NCAC 02H.0900,and the legal authorities,policies,procedures,and financial provisions contained in
its pretreatment program submission and Division approved modifications thereof. Such operation shall include but is
not limited to the implementation of the following conditions and requirements.Terms not defined in Part II or Part IV
of this permit are as defined in 15A NCAC 02H.0903 and 40 CFR 403.3.
1. Sewer Use Ordinance(SUO)
The Permittee shall maintain adequate legal authority to implement its approved pretreatment program. [15A
NCAC 02H.0903(b)(32), .0905 and.0906(b)(1);40 CFR 403.8(f)(1)and 403.9(b)(1)and(2)]
2. Industrial Waste Survey(IWS)
The Permittee shall implement an IWS consisting of the survey of users of the POTW collection system or
treatment plant,as required by 40 CFR 403.8(f)(2)(i-iii)and 15A NCAC 02H .0905 [also 40 CFR 122.44(j)(1)],
including identification of all Industrial Users that may have an impact on the POTW and the character and amount
of pollutants contributed to the POTW by these Industrial Users and identification of those Industrial Users
meeting the definition of SIU. Where the Permittee accepts wastewater from one or more satellite POTWs,the
IWS for the Permittee shall address all satellite POTW services areas,unless the pretreatment program in those
satellite service areas is administered by a separate Permittee with an approved Pretreatment Program.The
Permittee shall submit a summary of its IWS activities to the Division at least once every five years, and as
required by the Division. The IWS submission shall include a summary of any investigations conducted under
paragraph C.2.c. of this Part. [15A NCAC 02H .0903(b)(13), .0905 and .0906(b)(2);40 CFR 403.8(f)(2)and 403.9]
3. Monitoring Plan
The Permittee shall implement a Division-approved Monitoring Plan for the collection of facility specific data to
be used in a wastewater treatment plant Headworks Analysis(HWA)for the development of specific pretreatment
local limits.Effluent data from the Plan shall be reported on the DMRs(as required by Parts II.D and II.E.5.). [15A
NCAC 02H .0903(b)(16), .0906(b)(3) and.0905]
4. Headworks Analysis(HWA)and Local Limits
The Permittee shall obtain Division approval of a HWA at least once every five years, and as required by the
Division. Within 180 days of the effective date of this permit(or any subsequent permit modification)the
Permittee shall submit to the Division a written technical evaluation of the need to revise local limits(i.e.,an
updated HWA or documentation of why one is not needed) [40 CFR 122.44].The Permittee shall develop,in
accordance with 40 CFR 403.5(c)and 15A NCAC 02H .0909, specific Local Limits to implement the prohibitions
listed in 40 CFR 403.5(a)and(b)and 15A NCAC 02H.0909.Pursuant to 40 CFR 403.5,local limits are
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enforceable Pretreatment Standards as defined by 40 CFR 403.3(1). [15A NCAC 02H.0903(b)(10), .0905, and
.0906(b)(4)]
5. Industrial User Pretreatment Permits(IUP)&Allocation Tables
In accordance with NCGS 143-215.1,the Permittee shall issue to all Significant Industrial Users,permits for
operation of pretreatment equipment and discharge to the Permittee's collection system or treatment works.These
permits shall contain limitations,sampling protocols,reporting requirements,appropriate standard and special
conditions,and compliance schedules as necessary for the installation of treatment and control technologies to
assure that their wastewater discharge will meet all applicable pretreatment standards and requirements.The
Permittee shall maintain a current Allocation Table(AT)which summarizes the results of the HWA and the limits
from all IUPs. Permitted IUP loadings for each parameter cannot exceed the treatment capacity of the POTW as
determined by the HWA. [15A NCAC 02H .0906(b)(6), .0909, .0916,and.0917;40 CFR 403.5,403.8(f)(1)(iii);
NCGS 143-215.67(a)]
6. Authorization to Construct(AtC)
The Permittee shall ensure that an Authorization to Construct permit(AtC)is issued to all applicable Industrial
Users for the construction or modification of any pretreatment facility.Prior to the issuance of an AtC,the
proposed pretreatment facility and treatment process must be evaluated for its capacity to comply with all
Industrial User Pretreatment Permit(IUP) limitations. [15A NCAC 02H .0906(b)(7)and.0905;NCGS 143-
215.1(a)(8)]
7. POTW Inspection&Monitoring of their IUs
The Permittee shall conduct inspection, surveillance,and monitoring activities as described in its Division
approved pretreatment program in order to determine, independent of information supplied by Industrial Users,
compliance with applicable pretreatment standards. [15A NCAC 02H .0908(e);40 CFR 403.8(f)(2)(v)] The
Permittee must:
a. Inspect all Significant Industrial Users(SIUs)at least once per calendar year;
b. Sample all Significant Industrial Users(SIUs)at least once per calendar year for all SIU permit-limited
parameters including flow except as allowed under 15A NCAC .0908(e);and
c. At least once per year,document an evaluation of any non-significant categorical Industrial User for
compliance with the requirements in 40 CFR 403.3(v)(2), and either continue or revoke the designation as non-
significant.
8. IU Self Monitoring and Reporting
The Permittee shall require all Industrial Users to comply with the applicable monitoring and reporting
requirements outlined in the Division-approved pretreatment program,the industry's pretreatment permit,or in 15A
NCAC 02H .0908. [15A NCAC 02H.0906(b)(5)and.0905;40 CFR 403.8(f)(1)(v)and(2)(iii);40 CFR
122.44(j)(2)and 40 CFR 403.12]
9. Enforcement Response Plan(ERP)
The Permittee shall enforce and obtain appropriate remedies for violations of all pretreatment standards
promulgated pursuant to section 307(b)and(c)of the CWA(40 CFR 405 et. seq.),prohibitive discharge standards
as set forth in 40 CFR 403.5 and 15A NCAC 02H.0909,specific local limitations,and other pretreatment
requirements.All remedies,enforcement actions and other,shall be consistent with the Enforcement Response
Plan(ERP)approved by the Division. [15A NCAC 02H .0903(b)(7), .0906(b)(8)and.0905;40 CFR 403.8(0(5)]
10. Pretreatment Annual Reports(PAR)
The Permittee shall report to the Division in accordance with 15A NCAC 02H .0908.In lieu of submitting annual
reports,Modified Pretreatment Programs developed under 15A NCAC 02H.0904(b)may be required to submit a
partial annual report or to meet with Division personnel periodically to discuss enforcement of pretreatment
requirements and other pretreatment implementation issues.
For all other active pretreatment programs,the Permittee shall submit two copies of a Pretreatment Annual Report
(PAR)describing its pretreatment activities over the previous calendar year to the Division at the following
address:
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NC DEQ/Division of Water Resources/Water Quality Permitting Section
Pretreatment,Emergency Response,and Collection Systems(PERCS) Unit
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
These reports shall be submitted by March 1 of each year and shall contain the following:
a. Narrative
A narrative summary detailing actions taken, or proposed,by the Permittee to correct significant non-
compliance and to ensure compliance with pretreatment requirements;
b. Pretreatment Program Summary(PPS)
A pretreatment program summary(PPS)on forms or in a format provided by the Division;
c. Significant Non-Compliance Report(SNCR)
A list of Industrial Users(IUs) in significant noncompliance(SNC)with pretreatment requirements,and the
nature of the violations on forms or in a format provided by the Division;
d. Industrial Data Summary Forms(IDSF)
Monitoring data from samples collected by both the POTW and the Significant Industrial Users(SIUs).These
analytical results must be reported on Industrial Data Summary Forms(IDSF) or on other forms or in a format
provided by the Division;
e. Other Information
Copies of the POTW's allocation table,new or modified enforcement compliance schedules,public notice of
IUs in SNC,a summary of data or other information related to significant noncompliance determinations for
IUs that are not considered SIUs, and any other information,upon request,which in the opinion of the Director
is needed to determine compliance with the pretreatment implementation requirements of this permit;
11. Public Notice
The Permittee shall publish annually a list of Industrial Users(IUs)that were in significant noncompliance(SNC)
as defined in the Permittee's Division-approved Sewer Use Ordinance with applicable pretreatment requirements
and standards during the previous twelve month period.This list shall be published within four months of the
applicable twelve-month period. [15A NCAC 02H .0903(b)(34), .0908(b)(5)and.0905 and 40 CFR
403.8(f)(2)(viii)]
12. Record Keeping
The Permittee shall retain for a minimum of three years records of monitoring activities and results,along with
support information including general records,water quality records,and records of industrial impact on the
POTW and shall retain all other Pretreatment Program records as required by 15A NCAC 02H .0908(f). [15A
NCAC 02H .0908(f);40 CFR 403.12(o)]
13. Pretreatment Program Resources
The Permittee shall maintain adequate funding and qualified personnel to accomplish the objectives of its approved
pretreatment program. and retain a written description of those current levels of inspection. [15A NCAC 02H
.0906(b)(9)and(10)and.0905;40 CFR 403.8(f)(3),403.9(b)(3)]
14. Modification to Pretreatment Programs
Modifications to the approved pretreatment program including but not limited to local limits modifications, POTW
monitoring of their Significant Industrial Users(SIUs),and Monitoring Plan modifications, shall be considered a
permit modification and shall be governed by 40 CFR 403.18, 15 NCAC 02H .0114 and 15A NCAC 02H .0907.
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