NC0003433_Issuance of Permit_20181017

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a:-
ROY COOPER # '� ,
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Governor c '�"> `)'
J
MICHAEL S.REGAN �. s
Secretary au
LINDA CULPEPPER
Interim Director NORTH CAROLINA
Environmental Quality
October 17, 2018
Mr. Paul Draovitch
Senior Vice President
Environmental, Health & Safety
Duke Energy Progress, LLC
526 S. Church Street
Mail Code: EC3XP
Charlotte,North Carolina 28202
Subject: Draft NPDES Permit Modification
Permit NC0003433
Cape Fear Steam Electric Plant
Chatham County
Grade I Physical Chemical WPCS
SIC 4911
Dear Mr. Draovitch:
Enclosed with this letter is a copy of the Draft NPDES permit modification for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
• Proposed location for Outfall 008 [Lat: 35°35'29.54"N, Long: 79°3'3.85"W] has been
added to the map. Upon completion of the Outfall 008 relocation, and written notification
received by the Division, the Permittee is allowed to discharge through Outfall 008 at the
new location. Accordingly, notification requirement has been added to the permit [See
Supplement to Permit Cover Sheet].
• Special Condition A. (13.) Instream Monitoring has been revised to reflect the updated
description for upstream and downstream sampling locations.
The NPDES standard conditions (Parts II, III, and IV)that are a part of the permit are not included
in this draft document (cover, map, and Part I). The latest version is available at
https://bit.ly/2BZ4xxx and can be viewed online or downloaded as a PDF file.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Chatham County area, soliciting public comments on this draft permit.
Please provide any written comments you may have to the following: NCDEQ/DWR,NPDES
£
D_EQ,)
e
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 3601

Permitting Branch, 1617 Mail Service Center, Raleigh,NC 27699-1617 no later than 30 days
after receipt of this draft permit.
Following the 30-day public comment period, the Division will review all pertinent comments
and take appropriate action prior to issuing a final permit. If you have questions concerning this
draft permit,please call me at(919) 707-3610 or by email at [e-mail].
Sincerely,
13:'' ;--f-;4
Bing Bai, Engineer
NPDES Complex Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/PWSS RegionallEngineer/Allen Hardy
DWR/Regional Operations Section/Eric Smith
DWR/Aquatic Toxicology Branch/Susan Meadows
DWR/Raleigh Regional Office/Water Quality
DWR/Operator Certification Program/Maureen Kinney
Duke Energy Progress,!LLC/Richard Baker
Email: [e-mail]
Page 2 of 2

Permit NC0003433
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
3
In compliance with the provisions of North Carolina General S 43 215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act;/as'amended,
Duke Energy Progress LLC
is hereby authorized to discharge wastewater from a facility located'at the
Cape Fean,Steani Electric Power Plant
500•,CP&L'Road
4. Moncure,
�'v Chatham County_ ..�
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to receiving waters designated as an unnamed tributarylo the Cape Fear River (Outfall 007) and to the
Cape Fear River(Outfalls 008, 009)-in the Cape Fear River Basin in accordance with effluent limitations,
monitoring requirements,and other applicable conditions.set forth in Parts I, II and III hereof.
� t ,
This permit shall'bedom_ e effective, Month, XX,XXXX
\ ; 1
This permit and author zatiori'to discharge shall expire at midnight on June 30, 2023.
Signed this day Month, XX, XXXX.
DRAFT
Linda Culpepper
Interim Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 24

Permit NC0003433
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked, and as of this issuance, any prel iously issued permit bearing this number is no longer effective.
Therefore, the exclusive authority to operate and discharge from this facility arises under the permit
conditions, requirements, terms, and provisions included herein.
Duke Energy Progress LLC is hereby authorized to:
1. Operate the following modified systems located at the decommissioned Cape Fear Steam Electric
Power Plant at 500 CP&L Road near Moncure in Chatham County:
• 1978 Ash Basin (Internal Outfall 001).This outfall is,de grated as an emergency discharge
only and will consist of ash basin decanting wastewater. This is limited to discharging excess
wastewater above the available treatment plantcapacity-during an eminent threat of 1978 Ash
Basin overflow. 41
_
• 1985 Ash Basin (Internal Outfall 005):This outfall is designated as
.an emergency discharge
only and will consist of ash basin decanting wastewater This is limited\to discharging excess
wastewater above the available treatment plant capacity during an eminent;threat of 1985 Ash
Basin overflow. ( %,'� , � /�
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• Combined Wastewater to an Unnamed Tributary to the Cape Fear River (Outfall 007).
This outfall will discharge collectedvflowsIrom,the effluent channel consisting of ash basin
comingled treateddec nting vuastewater, storm water, constructed seep flows, and episodic
emergency flow from Internal Outfalls 001eand,005: - ''-
• Combined Wastewater to'the Cape Fear,�(Outfall 008). This new outfall will discharge
combined flows of treaated�wastewater from the on-site treatment facility,if necessary,to assure
state Water.:Quality Standar•,ds are not contravened in the receiving stream.
• 1963/,1970 Ash Basins (Outfall, 008A). This new outfall is designated as an emergency
discharge only and will cons1st`sof, ash basin decanting wastewater. This is limited to
discharging excess wastewater above the available treatment plant capacity during an eminent
threat of'`1°963/1970 Ash'Basin overflow.
• Ash Beneficiation,,Retention Pond Wastewater (Outfall 009). This new outfall will
discharge episodic-waste ater collected from isolated areas of the beneficiation operation
consisting of ash storage runoff, truck loading spills, and dust suppression.
• Constructed French Drain (Internal Outfall S-05). This internal outfall [Lat: 35° 35' 25"N, Long:
79° 2' 47" W] is for discharge of combined flow from two French Drain sources to effluent channel
of Outfall 007.
2. Upon construction and completion of the new proposed Outfall for Outfall 008, notify DWR Raleigh
Regional Office and NPDES Complexermitting Unit, in writing, at least two weeks prior to the
commencement of discharge from the ne I ly constructed Outfall 008.Notification can be submitted via
email or by mail to the following address:
Page 2 of 24

Permit NC0003433
NC Division of Water Resources
Water Quality Regional Office Operations Section Supervisor
3800 Barrett Drive
Raleigh,NC 27609
And
NC Division of Water Resources
NPDES Complex Permitting Supervisor
1617 Mail Service Center
Raleigh,NC 27699-1617
3. Discharges are to the Cape Fear River and unnamed tributaries to, e Cape Fear River,and are classified
as WS-IV waters in the Cape Fear River Basin. ;,/
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Page 3 of 24

Permit NC0003433
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS—Internal Outfall 001
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
a. During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge 1 on an emergency basis 1978 (West) Ash Basin decanting
wastewater in excess of the facility's treatment capacity of 0.72 MGD to mitigate an eminent
1978 Ash Basin overflow. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency 2 Type Location
FlowD fly,during Estimate Effluent
yEpisodic‘Event
Footnotes: ,
1. The Permittee shall notify the Raleigh`Regional Office(919) 794--.420,0 no later than the end
of the next business day of the occurrence of an emergency discharge`event including time
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of occurrence, duration, and cause. �;, , '--, )
2. During the duration of an emergency discharge event, the flow shall be reported daily.
b. Upon the occurrence of an emergency overflow event,Outfall 007 effluent sampling and
reporting shall commence immediately for thelimited parameters listed in A.(3.)except for
Mercury and Chronic Toxicity, and 'shall continue once per;,week for the duration of the
emergency discharge event.,'Results of sampling from this Outfall shall meet the effluent
limitations in A. (3.):.'N, `;` ' r/ ,"7
c. There shall-be-no discharge-6f floaflng,.solids\orvvisible foam in other than trace amounts.
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Page 4 of 24

Permit NC0003433
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS—Internal Outfall 005
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
a.- During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge I on an emergency basis 1985 (East) Ash Basin decanting
wastewater in excess of the facility's treatment capacity of 0.72 MGD to mitigate an eminent
1985 Ash Basin overflow. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency 2 Type Location
Flow Daily/during
Estimate Effluent
Episodic Event
(1 /
Footnotes: tit `s
1. The Permittee shall notify the Raleigh Regional Office(919 )791-4200 no later than the end
of the next business day of the occurr{ence,of an emergency discharge event including time
of occurrence and cause.., ti
2. During the duration of a discharge event th&flow shall be reportedvdaily.
b. Upon the occurrence of an emergency,overflow4vent, Outfall 007 effluent sampling and
reporting shall commence immediately for^the limited,'parameters listed in A.(3.)except for
Chronic Toxicity and Mercury, and4allcontinue once per week for the duration of the
emergency discharge event. Result's*sampli g•from this`'Outfall shall meet the effluent
limitations in A./((30:);, - y q�<
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c. There shall be nosdischarge of floating solids or visible foam in other than trace amounts.
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Page 5 of 24

Permit NC0003433
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS—Outfall 007
(decanting) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
a. During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 007 comingled treated ash basin decanting
wastewater (decanting the free water above the settled ash layer that does not involve
mechanical disturbance of the ash), stormwater, emergency episodic discharge from Internal
Outfalls 001 &005,and Constructed French Drain wastewater from S-05. Such discharges shall
be limited and monitored by the Pel mittee as specified below:
EFFLUENT (LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Type Sample
Average Maximum Frequency Location
Flow 1 0.73 MGD 77, Daily Estimate 1 Effluent
pH 2 6.0<jpH<9.0 S.U. ( ,/Monthly Grab Effluent
" Total Suspended Solids 3 30.0 mg/L 100.0 mng/L Monthly, Grab Effluent
Oil and Grease 15.0 mg/L 20,(1'ng/l1 Monthly '." Grab Effluent
Total Antimony 5.6 µg/IL 5 ' /LMonthly \ -, ''', Grab Effluent
Total Arsenic 10.0 µg/L 340.0 µg/L Weekly " 'Grab Effluent
Total Molybdenum 160 µg%L 160 µg/ _' ,,.,, Monthly ''rGrab Effluent
Total Nickel 25.0 µg1L"'-335.2 µg/L's" -Monthly Grab Effluent
Total Selenium 5.0 pa\�',,56:0„µg/L ''''',.,::Weekly Grab Effluent
Total Zinc 125.7 µg/L, \l25:7,, tg/L Monthly Grab Effluent
Turbidity a ! '\ ' s'''): -,,,„Moiithl,r Grab Effluent
,�-��_,"
Total Mercury 5 // ,-- LIZng/L a annual'average:,,ti Weekly Grab Effluent
Total Cadmium, µg/L 6,;<,: < ‘N,,.,°'t 1 " ; Monthly Grab Effluent
Total Copper, µg/L \';,,:',‘,,, �y e Monthly Grab Effluent
Total Lead .,�`" ,A "`� V
µg/L-�-AP 1 •� Monthly Grab Effluent
Fluoride,mg/L' ,, ''',., \-,:,,„,,*',( I--"'!,,z.,';3>,,,,, \ Monthly Grab Effluent
Sulfates,nig/j,/ ''''<•„!,\!,\ '''''''‘, ..,1 Monthly Grab Effluent
Total DissolyedvSolids,mg/L°.; ,, ' < , - Monthly Grab Effluent
Thallium, µg/L•\ ; °`>, ° ',,s Monthly Grab Effluent
Chronic Toxicity` '' �' b :-r Quarterly Grab Effluent
Total Hardness,mg/L, NNN . l ` } Quarterly Grab Effluent
Nitrate/Nitrite as N,mg/L\ 7 :; Quarterly Grab Effluent
Total Kjeldahl Nitrogen,rng/L> ( ,/ Quarterly Grab Effluent
Total Nitrogen,mg/L8 ``:..sem Quarterly Grab Effluent
Total Phosphorus,mg/L Quarterly Grab Effluent
Footnotes:
1. Flow estimate can be based on umping log if pumps are in service at time of flow. If flow
is occurring with no pumps ope ating then flow measurement is required by using a V-notch
weir, stop watch and calibrated cylinder, or other methods approved by the Division (such
as flow sensor devices).
2. The facility shall continuously rnonitor pH when the decanting process commences and the
pump shall be shutoff automatically when the 15 minutes running average pH falls below
6.1 standard units or rises above 8.9 standards units. Pumping will be allowed to continue if
Page 6 of 24

Permit NC0003433
interruption might result in a dam failure or damage. The continuous pH monitoring is only
required when the pumps are employed. In the event of a shut-off of the decanting pumps,
due to continuous monitoring of pH, decanting may continue once the results of operational
samples show the wastewater is back to within the allowable range of the 15 minutes running
average for pH.
3. The facility shall continuously monitor TSS concentration when the decanting process
commences and the pump shall be shutoff automatically when the 15 minutes running
average exceeds 50 mg/L. 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. In the event of a shut-off of the decanting pumps, due to continuous
monitoring of TSS, decanting may continue once the results of operational samples show the
wastewater is back to within the allowable range of tby i,minutes running average for TSS.
4. The discharge from this facility shall not cause turbidityin 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 thereceiving 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 datashall be reported on the DNIRs.
(See 15A NCAC 2B .0211 (21)). ,kms,
5. The facility shall use EPA method 1631E.\ er*Arthual ayshall be the calendar average.
6. Total Cadmium shall be meafured to a Practical=Quantitation Level of 0:51g/L.
7. Chronic Toxicity (Ceriodap\hniaa c ubia) at 90%`in ebruary, May, August, and November;
See Special Condition A. (10.)x` �� �" �F`
8. Total Nitrogen=Total Kjeldahl Nitrogen,±Nitrate/Nitrite as N.
b. When the facility commences the ash`;pond/ponds*decantingi_dewatering, the facility shall
treat the wastewater discharged from\,the/ash pond/ponds using physical-chemical
treatment, if necessary, to assurer state Water,Quality Standards are not contravened in the
receiving stream. Duk 'Energyshall notify DWR NPDES Permitting and DWR Raleigh "
RegionaLOffice,min writing,-within seven ca endar days of installing additional physical-
/
chemicl treatment'at this'Outfall.
, � v:.; ` , s; 85%
c. If any,�one of these pollutants (A ,Se, Sb, Hg, Mo, Ni, Pb and Zn) reaches 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 Br�ch via telephone and e-mail.
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d. The facility is allowed,to drawdown the wastewater in the ash pond to no less than three feet
above the ash. The r`ate'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 15 A, Subchapter 2K.
e. The facility shall use a floating pump station with free water skimmed from the ash basin
wastewater surface using an adjustable weir.
f. If no discharge occurs during the reporting period the Permittee shall submit its DMR
eDMR), as required, and indicate "No Flow" (15A NCAC 02B .0506(a)(1)(E)).
g. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 7 of 24

Permit NC0003433
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS—Outfall 008
(decanting) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
a. During the period beginning on the effective date of this permit,and lasting until the commencement
of ash basin dewatering, or the addition of groundwater remediation treated wastewater, or
permit expiration,the Permittee is authorized to discharge from Outfall 008 comingled treated ash
basin decanting wastewater(decanting the free water above the settled ash layer that does not
involve mechanical disturbance of the ash). Such discharges shall be limited and monitored by
the Permittee as specified below:
EFFLUENT (LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Type Sample
Average , Maximum Frequency Location 1
Flow I 0.72 MGD // ;1„Daily Estimate 2 Effluent
pH 3 6.0<I pH<9.0 S.U. : Monthly Grab Effluent
Total Suspended Solids 4 30.0 mg/L 100.0 mg/) Monthly Grab Effluent
Oil and Grease 15.0 mg/L 20.0ig/LMonthly4 „;�': Grab Effluent
Total Mercury 5 47 ng/L,I annual averages Weekly \ ,,,, Grab Effluent
Turbidity 6 y , Monthly ''4(<:�°'';Grab Effluent
Total Arsenic, µg/L /4-,> \ ',,,/,',Weekly 'Grab Effluent
Total Selenium, µg/L ,; A° ; \, <Weekly Gfab Effluent
Total Nickel, µg/L �: t v \
Monthly Grab Effluent
Total Lead, µg/L I '; '''"z--;,,''';' ,,,,, Monthly Grab Effluent
Chronic Toxicity? ,� 1 ,; '°` XI ,',, Quarterly, Grab Effluent
Total Hardness,mg/L / ;r - , , I ; ' ,/-;;;, Quarterly Grab Effluent
Nitrite/Nitrate as N,mg%L°` \ ` , °' Quarterly Grab Effluent
Total Kjeldahl Nitrogen,mg/I>, .-11 ` , Quarterly Grab Effluent
Total Nitrogen, ,mg/L„8 °. F ., � '; Quarterly Grab Effluent
Total Phosphorus,mg/L ,� ``� 7'— ' -,, _,-,.,_ ti g Quarterly Grab Effluent
/yp ` L\
Footnotes: {� ., �'�;� "�•
1. Effluent=cominglediample of the treatment facility's wastewater.
2. Flow estimate can be based on�pumping log if pumps are in service at time of flow. If flow
is occurririg'with no pumps,operating then flow measurement is required by using a V-notch
weir, stop watch and c librateci cylinder, or other methods approved by the Division (such
as flow sensor-devices) 'L"
3. The facility shall contiguously monitor pH when the decanting process commences and the
pump shall be shutoff automatically when the 15 minutes running average pH falls below
6.1 standard units or rises above 8.9 standards 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 a ployed. In the event of a shut-off of the decanting pumps,
due to continuous monitoring o pH, decanting may continue once the results of operational
samples show the wastewater is back to within the allowable range of the 15 minutes running
average for pH.
4. The facility shall continuously monitor TSS concentration when the decanting process
commences and the pump shall be shutoff automatically when the 15 minutes running
average exceeds 50 mg/L. 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
Page 8 of 24

Permit NC0003433
are employed. In the event of a shut-off of the decanting pumps, due to continuous
monitoring of TSS,decanting may continue once the results of operational samples show the
wastewater is back to within the allowable range of the 15 minutes running average for TS S.
5. The facility shall use EPA method 1631E. Annual average shall be the calendar year.
6. 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)).
7. Chronic Toxicity(Ceriodaphnia dubia) at 1.7% in February, May, August, and November;
See Special Condition A. (10.).
8. Total Nitrogen=Total Kjeldahl Nitrogen+Nitrate/Nitri' to as N.
b. When the facility commences the ash pond//oriels decantirig /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 notifyy,DWR NPDES Pernutting and DWR Raleigh
Regional Office, in writing, within seven 'calendar days of installing;`additional physical-
chemical treatment at this Outfa .
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c. If any one of these pollutants (As Se,"Hg, Ni, andvPb).reaches 85% of the allowable level
during the decanting/dewatering,�thge fac flit-,shall immediately discontinue discharge of the
wastewater and report it to the Regional Office-,and Complex NPDES Permitting Branch
via telephone and e-mail. �`�.
d. The facility is allowed to drawdown the ewater in the-ash wa"s"tpond 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 4a`-higher rate •is supported to the satisfaction of DEMLR and in
accordance"with NCAC,;Title'15 A,Subchapter°2K.
e. The.�facility shall use.,a�floating-pump station/with free water skimmed from the ash basin
wastewater surface using�an adjustable weir.
f. If no discharge occurs during the reporting period the Permittee shall submit its DMR
(eDMR), as required, and indicate"No Flow" (15A NCAC 02B .0506(a)(1)(E)).
g. There shall be no`discharge of floating solids or visible foam in other than trace amounts.
Page 9 of 24

I
Permit NC0003433
A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS—Outfall 008
(dewatering) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
a. During the period beginning with the start of ash pond dewatering, and lasting until the addition
of groundwater remediation treated wastewater, or permit expiration, the Permittee is authorized
to discharge from Outfall 008 Icomingled treated ash basin dewatering wastewater. Such
discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT (LIMITS MONITORING REQUIREMENTS
Monthly Daily Measurement Sample Type Sample
CHARACTERISTICS Average Maximum Frequency Location 1
Flow ' I 0.72 MGD Daily, Estimate 2 Effluent
pH 3 6.0<pH<9.0 S.U. ,°Weekly Grab Effluent
Total Suspended Solids 4 30.0 mg/L 100.0 mg/L / ..weekly Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/L c,, /Weekly Grab Effluent
Total Selenium 0.30 mg/L 2.73 mg/L.) Weekly N. Grab Effluent
Total Mercury 5 47 ng/L, annual,ayerale Weekly,„.� Grab Effluent
Turbidity6 1 ` � �� Weekly �,''\Grab Effluent
Total Aluminum,mg/L I �,��, Weekly :Grab Effluent
Total Arsenic, µg/L /-1-s, ''Z' ,/Weekly Grab, Effluent
Total Cadmium, µg/L \. ,Weekly Grab Effluent
Total Copper, µg/L `•,._`\;`,,,,.,^,;,,, • N eekly Grab Effluent
Total Nickel, µg/L I `'e, , " ;''~ _ Weekly Grab Effluent
Total Lead, µg/L ..47-77"-,- I ''y:\ �`--) ',,,WeellYX Grab Effluent
Chronic Toxicity8 a`;//— ;:--: 1 `E,: 1 / %`',;:-Monthly`/ Grab Effluent
Total Hardness,mg/L c,� �y'; `'' ". ,/ Quarterly Grab _ Effluent
Nitnte/Nitrate as N,mg/L\\l'` 1 I \, c Quarterly Grab Effluent
Total Kjeldahl Nitrogen, mg/ ,, A . 1 ;K_, `v, Quarterly Grab Effluent
Total Nitrogen;.mg1F ,' `x .I [--, ,,_ ''`, . \ Quarterly Grab Effluent
Total Phosphofus,mg/IN. ,N\ \\',y., I Quarterly Grab Effluent
Footnot`e �
s „ '`� ;� ,.FY L .
1. Effluent`,,comingled sample of the-treatment facility's treated wastewater.
2. Flow estimate can be based on pumping log if pumps are in service at time of flow. If flow
wi
is occurring with Jlo purines/operating then flow measurement is required by using a V-notch
weir, stop watch andfcalibrated cylinder, or other methods approved by the Division (such
as flow sensor devices)
3. The facility shall continuously onitor pH when the dewatering process commences and the
pump shall be shutoff automat cally when the 15 minutes running average pH falls below
6.1 standard units or rises abov 8.9 standards units. Pumping will be allowed to continue if
interruption might result in a d failure or damage. The continuous pH monitoring is only
required when the pumps are a ployed. In the event of a shut-off of the dewatering pumps,
due to continuous monitoring of pH,dewatering may continue once the results of operational
samples show the wastewater is back to within the allowable range of the 15 minutes running
average for pH.
4. The facility shall continuously) monitor TSS concentration when the dewatering process
commences and the pump shall be shutoff automatically when the 15 minutes running
average exceeds 50 mg/L. Pumping will be allowed to continue if interruption might result
Page 10 of 24

Permit NC0003433
in a dam failure or damage.The continuous TSS monitoring is only required when the pumps
are employed. In the event of a shut-off of the dewatering pumps, due to continuous
monitoring of TSS, dewatering may continue once the results of operational samples show
the wastewater is back to within the allowable range of the 15 minutes running average for
TSS.
5. The facility shall use EPA method 1631E. Annual average shall be the calendar year.
6. 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. AlLd'ata shall be reported on the DMRs.
(See 15A NCAC 2B .0211 (21)). //,,
7. Total Cadmium shall be measured to a Practical Quantitation Level,of 0.5 µg/L.
8. Chronic Toxicity(Ceriodaphnia dubia) at 1.7%,See Special Condition A. (11.).
9. Total Nitrogen=Total Kjeldahl Nitrogen+Nitrate/Nitrite as,,N.
b. When the facility commences the ash pon ;ponds decanting/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 DWRRNBDES%Permitting anitDWR Raleigh
Regional Office, in writing,within`seven calendar day' f installing additional physical-
chemical treatment at this Outfall.��;�'''•�,,
c. Dewatering is the removal of interstitial ter. starting when the free water level in the
settled ash basin is less-than 3 feet,\or`if the water level is;more than 3 feet above the ash
starting when mechanical-Aturbanceof the ash-occurs.wThe 'limits and conditions in A. (5.)
shall remain enforced until the groundwater remediation treated discharge has commenced
\
d. If any one of these 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,Officeand Complex NPDES Permitting Branch
via telephone and &mail. `\9.`\..
e. The facility shall submit written notification to the DWR Complex NPDES Permitting Unit
and the DWR.Raleigh Regional Offieeof the intent to begin the initial ash basin dewatering
activity sevencalendar days prior to commencing the dewatering.
f. 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'iupported to the satisfaction of DEMLR and in accordance with
NCAC, Title 15A, Subchapter 2K.
g. If no discharge occurs during the reporting period the Permittee shall submit its DMR
(eDMR), as required, and indicate "No Flow" (15A NCAC 02B .0506(a)(1)(E)).
h. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 11 of 24

Permit NC0003433
A. (6.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS—Outfall 008
• (dewatering and ground water remediation) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] _
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
a. During the period beginning with the start of groundwater remediation, and lasting until
completion/termination of all ash basin dewatering activities,or permit expiration,the Permittee
is authorized to discharge from Outfall 008 comingled treated ash pond dewatering wastewater
and groundwater remediation wastewater. 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 1
Flow ' 0.72 MGD /D,aily Estimate 2 Effluent
pH 3 6.0 d,pH<9.0 S.U. t„, ',Weekly Grab Effluent
Temperature, °C K.;`7 Weekly Grab Effluent
Total Suspended Solids 4 30.0 mg/L 100.0,ng/L° _ Weekly's. Grab Effluent
Oil and Grease 15.0 mg/L 20,0-nlg/L Weekly °'°;,. Grab Effluent
Total Aluminum 385.1 mg/L 385`:1 mg/L Weekly '-' ;';.ti Grab Effluent
Total Nickel 1.48 mg/L 16.3``ii/L ,Weekly 'c- 'Grab Effluent
Total Selenium 0.30 mg/L 2.73 mg/L"- ,,//Weekly Grab Effluent
- Total Mercury 5 47 ng/L, arinual average 5,':',a, Weekly Grab Effluent
Turbidity 6 '1, `' '.ti''' Weekly Grab Effluent
Total Arsenic L v WeeklyGrab Effluent
Total Beryllium, µg/L - , A,, ' , '''',:,21-s-' .,,,,, Weekly,, Grab Effluent
Total Copper, µg/L' /,''' .„; ,'', ' s\' \ ,/a ,..• •"W,eekly" Grab Effluent
Total Lead, µg/L (','- ' ;'/ / Weekly Grab Effluent
Total Silver, µg/L 7 °' ' ; <„ Weekly Garb Effluent
Total Zinc, µg/L____ v ' � �; ., Weekly Grab Effluent
Sulfates,mg/L , _: u<4; ,',., ,/'--1— * °°,-",, A Weekly Grab Effluent
Total Dissolved'Solids,ming/J , '% I ` -°°"".-, `'' Weekly Grab Effluent
Chronic Toxicity 8 \, '1\,:::1\ Monthly Grab Effluent
Total Hardness;,nig/L v�'�,<, off; Quarterly Grab Effluent
Conductivity, µmhos/cm `°, '°, ' N: Quarterly Grab Effluent
Nitrite/Nitrate as N,mg/L ``; ' ; ' Quarterly Grab Effluent
Total Kjeldahl Nitrogen;.,ii"g/L ) I Quarterly Grab Effluent
Total Nitrogen,mg/L 9 \\,\7. ,/ ' Quarterly Grab Effluent
Total Phosphorus,mg/L \..7 I Quarterly Grab Effluent
Footnotes:
1. Effluent=comingled sample of the treatment facility's treated wastewater.
2. Flow estimate can be based on pumping log if pumps are in service at time of flow. If flow is
occurring with no pumps operatiing then flow measurement is required by using a V-notch
weir, stop watch and calibrated dylinder, or other methods approved by the Division(such as
flow sensor devices).
3. The facility shall continuously monitor pH when dewatering process commences and the
pump shall be shutoff automatically when the 15 minutes running average pH falls below 6.1
standard units or rises above 8.? standards units. Pumping will be allowed to continue if
interruption might result in a dam failure or damage. The continuous pH monitoring is only
Page 12 of 24

Permit NC0003433
required when the pumps are employed. In the event of a shut-off of the dewatering pumps,
due to continuous monitoring of pH, dewatering may continue once the results of operational
samples show the wastewater is back to within the allowable range of the 15 minutes running
average for pH.
4. The facility shall continuously monitor TSS concentration when the dewatering process
commences and the pump shall be shutoff automatically when the 15 minutes running average
exceeds 50 mg/L. 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. In the event of a shut-off of the dewatering pumps, due to continuous monitoring
of TSS,dewatering may continue once the results of operational samples show the wastewater
is back to within the allowable range of the 15 minutes running average for TSS.
5. The facility shall use EPA method 1631E. Annual average'shall be the calendar year.
6. The discharge from this facility shall not cause turbidity`i 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 theree'eiving,stream. Therefore,if the effluent
measurement exceeds 50 NTU,the Permittee shalieample 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 reportechon the DMRs. (See 15A
NCAC 2B .0211 (21)).
7. Total Silver shall be measured to a Practical nsLevel of 1.0;}.tg/L.
8. Chronic Toxicity(Ceriodaphnia,dubia) at 1.7%;'See Special ConditionnA '(11 ).
9. Total Nitrogen=Total Kjeldahl Nitrogen+Nittrrate/Nitrite as N. �
b. When the facility commences the ash pond/ponds decanting/dewatering,the facility shall
treat the wastewater discharged fromtheash pond/ponds^using physical-chemical
treatment,if necessary t6 assure state,Water Quality,,Standards are not contravened in the
receiving stream.'Duke Energy shall notify DWRiNPDES;Permitting and DWR Raleigh
Regional Office,-in writing,within sevencalendar days of-installing additional physical-
chemical treatment\at this Outfall. • . }a
c. Dewatering i"s the removal o f ' terstitial water starting when the free water level in the
settled ash basin" is-less than 3 feet, or,,if'the water level is more than 3 feet above the ash
starting when mechanical disturbance of the ash occurs.The limits and conditions in A. (6.)
shall`teinain enforcediuntil all ashkasins dewatering is completed.
d. If any one of these pollutants,(As,Al,Se,Hg,Ni, and Pb)reaches 85% of the allowable level
during the decanting/dewaterng,the facility shall immediately discontinue discharge of the
wastewater and,rei
port it to the Regional Office and Complex NPDES Permitting Branch
via telephone andte-mail.,
e. The facility shall submit written notification to the DWR Complex NPDES Permitting Unit
and the DWR Raleigh4egional Office of the intent to begin the addition of groundwater
remediation wastewater to the ash basins treatment facility's influent in conjunction with
ash basin dewatering wastewater, seven calendar days prior to commencing the addition.
See Special Condition A. (18.) for further requirements.
f. 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.
g. If no discharge occurs during the reporting period the Permittee shall submit its DMR
(eDMR), as required, and indicate"No Flow" (15A NCAC 02B .0506(a)(1)(E)).
h. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 13 of 24

Permit NC0003433
A. (7.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS—Outfall 008
(ground water remediation) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
a. During the period beginning with the completion/termination of all ash pond dewatering
activities,and lasting until permit expiration,the Permittee is authorized to discharge from Outfall
008 treated groundwater remediation wastewater. Such discharges shall be limited and
monitored by the Permittee as spei ified below:
EFFLUENT I LIMITS MONITORING REQUIREMENTS
Monthly Daily Measurement Sample Sample
CHARACTERISTICS 1
Average Maximum Frequency Type Location
Flow I 0.72 MGD /Ye,ekly Continuous 1 Effluent
pH 6.0<pH<9.0 S.U. //°-Weekly Grab Effluent
Temperature, °C _ `Weekly Grab Effluent
Total Suspended Solids 30.0 mig/L 45.0 ig%1;%/7 °eekly Grab Effluent
Oil and Grease 15.0 mg/L 20;0`mg/L _ Weekly Grab Effluent
TotalAluminum 385.1 nig/L 385.,1,mg/L 2/Montl ' �, Grab Effluent
Total Nickel 1.48 mg/L '16.3�mg/L 2/Month`C, ,, Grab Effluent
Sulfates 14,811 mg/L 14,811 mg/L /2/Month K; Grab Effluent
Turbidity2 \'"y',°" 2/Month Grab Effluent
Total Mercury, ng/L 3 \`';',A ;°`''-, 2/Month Grab Effluent
Total Arsenic, µg/L V o'•,`',.. °° ,� ''''s /Month Grab Effluent
Total Beryllium, µg/L I s ;s ''''N,"-. „Pte., \2/Month Grab Effluent
Total Lead, µg/L F—-->-,,, yt,, 1 <- G``;;° 2/1V44onth Grab Effluent
Total Selenium, µg/L / `„ -- .,: I ` \ / -% ,� 2/Morith Grab Effluent
Total Silver, µg/L 4 's:,- `< \ \ 1 y,,, c/" `',2/Month Grab Effluent
Total Zinc, µg/L `` ° N.,,\ 2/Month Grab Effluent
Total Dissolved,Solids,mg/L\ A / . Th.--,-,, % , 2/Month Grab Effluent
Total Hardness, mg/L -,%

Permit NC0003433
5. Chronic Toxicity(Ceriodaphnia dubia) at 1.7% in February, May, August, and November;
See Special Condition A. (10.).
6. Total Nitrogen=Total Kjeldahl Nitrogen+Nitrate/Nitrite as N.
b. The facility shall submit written notification to the DWR Complex NPDES Permitting Unit
and the DWR Raleigh Regional Office of the intent to continue groundwater wastewater
addition to the treatment facility's influent after the completion/termination of all ash
basins dewatering activities,seven calendar days prior to completion and termination of all
ash basin dewatering. See Special Condition A. (18.)for further requirements.
c. If no discharge occurs during the reporting period the Permittee shall submit its DMR
(eDMR), as required, and indicate"No Flow" (15A NCAC„02B .0506(a)(1)(E)).
d. There shall be no discharge of floating solids or visiblefaam in other than trace amounts.
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Page 15 of 24

Permit NC0003433
A. (8.)EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS-Outfall 008A
[15A NCAC 02B .0400 et seq., 0 BB .0500 et seq.]
a. During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to disch gel from Outfall 008A on an emergency basis 1963/1970 Ash
Basin decanting wastewater in excess of the facility's treatment capacity (> 0.72 MGD) to
mitigate an eminent 1963/1970 Ash Basin overflow. Such discharges shall be limited and
monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample , , Sample
Average, Maximum Frequency 2 Type Location
Flow Daily duffing Estimate Effluent
Episodic Event
6.0< I <9.0 S.U. /',Daily�during
pHp ,,,.., Episodic Evpnt Grab Effluent
•' 2 Daily during,
Total Suspended Solids 30.0 mg/L 100.0 mg/L Grab Effluent
,,,,,b./ Episodic Event =��
```, Daily during s.; 'N
Oil and Grease 15.0 mg/L120.0♦mg/L �.a,n Grab Effluent
1 v: , Episodic Event \ Nq,
Footnotes `` >. `y ** /
� v
� `t °.
1. The Permittee shall notify the)'Ralegh Regional'Office (919) 791- 4200 no later than the
end of the next business day of the occ rtence of ane mergency discharge event including
time of occurrence_duration andacause.`-;..'4~- ♦ "
2. During the uation of'an emergency discharge".event,the\flow shall be reported daily.
_ ; ;:
There shall be no discharge,of'floating solids or visible foam in other than trace amounts.
r „�__..._ .' 9, ''''.''''''\.,
7;a ♦ ` s
\'°'"'":,,,,
o`�,� 15 G.�, ,4`` ,/
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1
Page 16 of 24

Permit NC0003433
A. (9.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS—Outfall 009
(Beneficiation miscellaneous wastewater) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
a. During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge episodic beneficiation process area miscellaneous
wastewater (ash pile run off, wash water, captured dust spills) from Outfall 009. Such
discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location 1
Flow 0.005 MGD Monthly) Estimate 2 Effluent
Temperature, °C Monthly Grab Effluent
pH 6.0<pH<9.0 S.U. ,/Monthly Grab Effluent
Total Suspended Solids 30.0 mg/L 100.0 mg/L , ,Monthly ., Grab Effluent
Oil and Grease 15.0 mg/L 20.0 mg/:L' Monthly :v , Grab Effluent
Turbidity3 „ ',,,/ Monthly ' . ''>, Grab Effluent
Total Mercury 4 47 ng/L, annual average Monthly \ ,'Grab Effluent
Total Arsenic, µg/L Monthly `Grab Effluent
Total Selenium, µg/L .: `w._ .Monthly Grab Effluent
Footnotes: \
1. Effluent= comingled sample of treated wastewater.
2. Flow estimate can bevbased on pumping log�if pumps ar�e,i,service at time of flow. If flow
is occurring with no-pu ips,operating then flow.meas`urement is required by using a V-notch
weir, stop watchand calibrated cylindFrother methods approved by the Division (such
as flow sensor devices). )! �; <
3. The discharge from this fa cility,shall not cause turbidity in the receiving stream to exceed 50
NTU. If thOlnstrearnturbidity°exceeds 50,NTU due to natural background conditions, the
/discharge cannot cause turbidity to iritreaseqn the receiving stream. Therefore,if the effluent
'‘measurement exceeds 50``NTU, the Permittee shall sample upstream and downstream
amu,
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 15ANCAC 2B .0211\(21)).
4. The facility\shall use EPA method 1631E. Annual average shall be the calendar year.
aq Y
/
ti
b. If no discharge occurs,guriing the reporting period the Permittee shall submit its DMR
(eDMR), as required, and indicate"No Flow" (15A NCAC 02B .0506(a)(1)(E)).
c. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 17 of 24

Permit NC0003433
A.(10.) CHRONIC TOXICITY LIMIT- Outfalls 007 and 008 (Quarterly)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality
to Ceriodaphnia dubia at an effluent concentration of 90% for Outfall 007 and 1.7% for Outfall 008.
The permit holder shall perform, at a minimum,quarterly 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. The tests will be performed during the months of
February, May, August, and November . These months signify the first month of each three-month
toxicity testing quarter assigned to the facility. 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 quarter 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 Cam lina 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 monthsfi i 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 CarolinatDivision of',Water Resources
�� �,, Water Sciences Section/Aqatic Toxicology Branch
.y 1621 Mail'Service Center
(u, .t � Raleigh,NC 27699-1621
Completed Aquatic Toxicity Test Formsrslhall be filed`with the Water Sciences Section no later than 30
days after the end of thexeporting;pefiod,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 labotatory 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 steam
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 facilitylname;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, which is the three month timem 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.
Page 18 of 24

Permit NC0003433
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival,minimum control organism reproduction, and appropriate environmental controls, shall
constitute an invalid test and will require immediate follow-up testing to be completed no later than the
last day of the month following the month of the initial monitoring.
A. (11.) CHRONIC TOXICITY LIMIT- Outfall 008 (Monthly)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality
to Ceriodaphnia dubia at an effluent concentration of 1.7% for Outfall 008.
f
The permit holder shall perform, at a minimum, monthly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay'Procedure," Revised December 2010, or
subsequent versions or "North Carolina Phase'II Chronic Whole Effluent Toxicity Test Procedure"
(Revised- December 2010) or subsequent versions. Effluent sampling for this testing must be obtained
during representative effluent discharge and shall/lie performed at the•NPDES permitted final effluent
discharge below all treatment processes.
If the test procedure performed as the first test of any monthrresults in a'failure or ChV below the
permit limit, then multiple-concentration testing shallbe.irformed, at a minimum, in each of the
- two following months as described in"North Carolina Phase Il'Chronic Whole Effluent Toxicity Test
Procedure" (Revised-December 2010) or subsequent versions:,,.
•
All toxicity testing results required as part of ths•permit condition w.ill'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�THP3Blfor the Chronic Value. Additionally;"DWR Form AT-3 (original)is to
be sent to the following address: "
'4-Attention: t North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
/ 1621 Mail`Service Center
Raleigh,NC 27699-1621
Completed Aquatic Toxicity TestForms` 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.
Assessment of toxicity compliance is based on the toxicity testing month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re-opened and
modified to include alternate monitoring requirements or limits.
Page 19 of 24

Permit NC0003433
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls, shall
constitute an invalid test and will require immediate follow=up testing to be completed no later than the
last day of the month following the month of the initial monitoring.
A. (12.)ADDITIONAL CONDITIONS AND DEFINITIONS
[NCGS 143-213.3 (a) (2) and NCGS 143-213.66]
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. (40CFR 122.41(j)).
3. The term low volume waste sources mean 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 vpy,astewaterresulting from cleaning any metal
process equipment with chemical compounds, including,but not limited to,boiler tube cleaning(40
CFR 423.11 (c)). j / �/'
5. The term metal cleaning waste means any wastewater resulting frori-cleaning [with or without
chemical cleaning compounds] any metal process equipment including;:,but not limited to, boiler
tube cleaning,boiler fireside cleaning, and air preheatericleaning(40 CFR423.,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 methods approved by the
Division(such as flow sensor devices).
7. The term "FGD wet scrubber wastewater" means wastewater resulting from the use of the flue-gas
desulfurization wet scrubber:. I
8. There shall be no,discharge of polyichlor nate biphenyl rcoinpounds.
9. The permittee shall report the presence of cenospheres observed in any samples on the DMRs in the
comment section. `v
10.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. (13.) INSTREAM MONITORING°< \`.
[G.S. 143-215.3 (a) (2), G.S 143 X215:66]
The facility shall conduct monthly iris-stream monitoring for total arsenic,total selenium,total mercury,total
chromium, dissolved lead; dissolved cad l um, dissolved copper, dissolved zinc, total bromide, total
hardness (as CaCO3),temperature,turbidity, and total dissolved solids(TDS). The monitoring results shall
be reported on the facility's Discharge Monitoring Reports and included with the NPDES permit renewal
application.
Instream Sample Description Location
Upstream Outfall 008 0.9 miles upstream from Outfall 008A in Cape Fear River
Downstream Outfall 008 Approximately 250 meters downstream from Outfall 008A in Cape
Fear River
Instream monitoring is provisionally waived considering the permittee's participation in the Middle
Cape Fear River Basin Association provided the Association agrees to sample for all the parameters
listed in this condition and at the specified llocations.Instream monitoring shall be conducted as stated
in this permit should the permittee end itsI participation in the Association.
Page 20 of 24

Permit NC0003433
A. (14.) STRUCTURAL INTEGRITY INSPECTIONS OF ASH BASIN DAM
[15A NCAC 02K .0208]
The facility shall meet the dam design and dam safety requirements per 15A NCAC 2K.
A. (15.) FIS$TISSUE MONITORING NEAR ASH BASIN DISCHARGE OUTFALL 008
[NCGS 143-215.3(a)(2)]
The facility shall conduct fish tissue monitoring annually and submit the results with the NPDES permit
renewal application. The objective of this monitoring is to evaluate potential uptake of pollutants by fish
tissue near the ash pond discharge. The parameters analyzed in fish tissue shall include arsenic, selenium,
and mercury. The monitoring shall be conducted in accordance with the sampling plan approved by the
Division.The plan should be submitted to the Division within 1,80‘,s/from the effective date of the permit.
Upon approval, the plan becomes an enforceable part of the pe nit(
Copies of all the study plans, study results, and any otherapplicable materials should be submitted to:
1) Electronic Version Only(pdf and CD) Kt /
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 ti.
Division of Water Resources
Water Sciences Section <° /
1623 Mail Service Center `•, //
Raleigh,NC 27699-1623 l
A. (16.) 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 boundaryis subject t'oremediation 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.
A. (17.)APPLICABLE STATE LAW (State Enforceable Only)
[NCGS 143-215.1(b)]
This facility shall meet the General Statute requirements under NCGS § 130A-309.200 et seq. This permit
may be reopened to include new requirements imposed under these Statutes.
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Permit NC0003433
A.(18.)ADDITION OF OTHER WASTEWATERS TO ASH BASIN TREATMENT SYSTEM
[G.S. 143-214.1 (a)]
The Permittee may introduce on-site groundwater remediation wastewater as an additional influent to the
0.72 MGD capacity treatment system discharging only to Outfall 008 provided it does not result in violation
of NC water quality standards or EPA criteria. If necessary the Permittee shall determine what additional
treatment is required and then have operational prior to the addition of ground water wastewater.
The Permittee shall submit to the Division EPA Form 2C for the ground water wastewater addition no later
than 180 days after the introduction of the ground water wastewater to the treatment systems. The Division
may open upon further evaluation the permit and assign additional effluent limits or conditions.
A. (19.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[G.S. 143-215.1(B)] `
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,
2015.
NOTE: This special condition supplemen:s or supersedes.the following sections'within Part II of this
permit(Standard Conditions for NPDES Permits): \,. `;‘,/
• Section B. (11.) Signatory Requirements,
• Section D. (2.) Reporting ti� k. �
• Section D. (6.) Records Retention< ` \
• Section E. (5.) ni oM ring Reports,,
_gam
1. Reporting Requirement,,ISupersedes Section D.,(2.) and Section E. (5.) (a)1
The permittee shall reporttIdischarge monitoring data electronically using the NC DWR's Electronic
Discharge Mnitoring Report'(eDM-R)nterriet application.
Monitoring sults obtained`duringthe,, previous'month(s) shall be summarized for each month and
submitted\zelectronically 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), pern ittees will ihe.required to submit all discharge monitoring data to the state
electronicallyusingeDMR and 'illibe required to complete the eDMR submission byprinting,signing,
,,a, ,t � � q p P � g� � g,
and submitting one signed,',original and a copy of the computer printed eDMR to the following address:
NC DENR/Division of Wate Resources/Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699 1617
If a permittee is unable to use the eD 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.
Page 22 of 24

Permit NC0003433
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 peimitte'e must identify'the'initial recipient at the time of
each electronic submission. The permittee should use the EPA's website resources to identify the initial
recipient for the electronic submission. �\ '
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to-implement the NPDES program) that is the designated entity
for receiving electronic NPDES data [see'40'CFR 127.2(b)]:
EPA plans to establish a.website that will also link to the appropriate electronic reporting tool for each
type of electronic submission and for each state:, Instructions on how to access and use the appropriate
electronic reporting tool will be available as well: Informationhon'EPA's NPDES Electronic Reporting
Rule is found at: -
http://www2:epa.gov/compliance/final=national-pollutant-discharge-elimination-system-npdes-
electronic reporting-rule. , -
l r 1
Electronic.submissions must start by'thedates 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:
Page 23 of 24

Permit NC0003433
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
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: ,f'
http://deq.nc.gov/about/divisions/water-resources/edmr /
( ,, .
Certification. Any person submitting an electronic DMR4sing the state's eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL
BE ACCEPTED: \
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance;with a system,designed,to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or persons
who manage the system, or those persons.directly responsible for gathering the information, the
information submitted is, to the best of inay knowledge and belief true, accurate, and complete. I am
aware that there are significant penaltiesfor submitting false information, including the possibility of
•
fines and imprisonment for knowing violations:,"
/
5. Records Retention [Supplements\Section D.‘0.)-1/
ti
� I ,
The permittee-shall-retain records'`of;alliD`scharge Monitoring Reports, including eDMR submissions.
These records or-copiesshall be,maintained=for a--period of at least 3 years from the date of the report.
This pe iod4may be extended by requesi of the Director at any time [40 CFR 122.41].
< N
\ \
Page 24 of 24

r
Permit NC0003433
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SCALE: 1:24000
USGS Quad: E22SE Moncure,NC
Outfall 007 Outfall 008 Outfall 008(Proposed) Outfall 009 --.......
Latitude: 35°35'3" N 35°35'37.7" N 35°35'29.54" N 35°35'37.9" N
Longitude: 79°2'27" W 79°3'4.6" W 79°3'3.85" W 79°3'4.1" W
Stream Class: WS-IV N Facility Location
Subbasin: 03-06-07 HUC: 03030002 Cape Fear Steam Electric Plant NC0003433
Receiving Stream: Cape Fear River Chatham County