NC0003425_Draft Permit_20160826

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d;
Water Resources
ENVIRONMENTAL QUALITY
August 26, 2016
Mr. Mike Mosley, Plant Manager
Duke Energy Progress
Roxboro Steam Electric Plant
1700 Dunnaway Rd
Semora, North Carolina 27343
PAT MCCRORY
Governoi
DONALD R. VAN DER VAART
Secrelary
S. JAY ZIMMERMAN
Dneclor
Subject Draft NPDES Permit Renewal
Pernut NC0003425
Roxboro Steam Electric Plant
Person County
Class II Facility
Dear Mr Mosley
Enclosed with this letter is a copy of the draft permit renewal for your facility Please review this draft
carefully to ensure thorough understanding of the conditions and requirements it contains There are
several changes from the existing permit, including the following
• Effluent Limits and Monitoring Requirements were added for outfall 002 for the dewatering
phase of the ash pond
• Quarterly monitoring for selenium was added to outfall 006
• Monitoring for beryllium, vanadium, antimony and silver were eliminated for outfall 010
• Outfall 011 was added to the permit for the discharge of the new FGD system
• Outfall 012 was added to the permit to monitor the effluent of the proposed dual retention basin
treatment system
• Limits for arsenic, selenium, mercury and nitrate/nitrite were added for outfall 010 and 011 as
per 40 CFR 423
• Outfall 001 was reinstated in the permit to monitor the discharge of seeps and stormwater
• Special condition A. (8) Effluent Limits and Moruto'rmg Requirements (Outfall 008) was added for
the expansion of the wastewater treatment system to 0 025 MGD
• The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by the NC
Environmental Management Commission (EMC) on November 13, 2014 The US EPA
subsequently approved the WQS revisions on April 6, 2016 with some exceptions, one being the
disapproval of action level policy for permitting silver, copper and zinc In addition, the total
metal aquatic life criteria for chromium, iron, and manganese were deleted from the NC water
quality standards rules
The NC Division of Water Resources NPDES Permitting Unit is required to implement the new
dissolved metal standards in all permits public noticed after April 6, 2016 The new standards for
most metals include acute standards Further, the freshwater standards for several metals are
expressed as the dissolved form of the metals, and seven metals have hardness -dependent
equations The permit includes the requirement to sample for hardness at instream stations 4C
and 4D
State of North Carolina I Environmental Quality 1 Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919 807 6300

Mr. Mosley
Page 2
• A reasonable potential analysis (RPA) was performed for outfall 003 utilizing the new standards.
As a result of the RPA the following changes Were incorporated to the permit:
o Quarterly Amonitoring for
from the total
eril The cooling watery blowdown can be
thallium, chloride and total selenium
• Special Condition ( )
discharged to the ash pond or to the discharge canal
• Special Condition A. (26) was added to the permit regarding the submittal of all the required
information under 40 CFR 125 95 with the next permit application
• Starting December 21, 2016, federal regulations require electronic submittal of all discharge
monitoring reports (DMRs) and specify that, if a state does not establish a system to receive such
s electronically to the Environmental
submittals, then permitteese final NPDES Electro Dc Reporting Rule was adopted and became reffe liv
Agency (EPA) Th e on
December 21, 2015
The requirement to begin reporting discharge monitoring data electronically using the NC
DWR's Electronic Discharge Monitoring Report (eDMR) Internet application has been added to
your final NPDES permitCondition please9)] For information on vis t the following web page � registering
for eDMR and obtaining an eDMR user account,
http / / deq nc gov / about/ divisions /water -resources / edmr
For more information on EPA's final NPDES Electronic Reporting Rule, please visit the following
web site
h www2 e a gov compliance fmal-national- ollutant-dischar e-ehmmation-s stem-
npdes electromc-reporting-rule.
The following special conditions were added to the permit to be consistent with other d closure,
Duke
Energy permits. A (19) Applicable State Law, A (20) PCB Prohibition, A (2
)
A (28) Biodices, A (30) Additional Conditions and Deffirutions
Concurrent with this notification the Division is publishing a notice m a newspaper having circulation in
the general Person County solicting public commes on ths permit draft Please provide any
to the�DEQl DWR, NPDES Program nollater than 30 days after receiving this
comments you may have
draft permit
Following the 30 -day public comment period, the Division will review all pertinent comments and take
final permit. If you have questions concerning this draft permit,
appropriate action prior to issuing a
please call me at [phone] or by email at teresa rodriguez®ncdenr.gov
Sincerely,
Teresa Rodriguez
NPDES Complex Permitting Unit
cc NPDES Files ,
EPA Region 4 (e -copy)
Raleigh Regional Office / Water Quality Program (e -copy)
Raleigh Regional Office / Public Water Supply (e -copy)

P51r Mosley
Page 3
Operators Certification Program (e -copy)
Aquatic Toxicology Branch (e -copy)

f
Permit NC0003425
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PFRMTT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143 215 1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission and the Federal Water Pollution Control Act, as amended,
Duke Energy Progress, LLC
is hereby authorized to discharge wastewater from a facility ;located at the
Roxboro Steam Electric Generating Plant
1700 Dunnaway Road, Semora
Person County
to receiving waters designated as ,Nyco Reservoir in the Roanoke River Basin in accordance with
effluent linutations, monitoring requirements and other conditions set forth in Parts I II III and
IV hereof
This permit shall become effective
This permit and the authorization to discharge shall expire at midnight on
Signed this day
S Jay Zimmerman, P G
Division of Water Resources
By Authority of the Environmental Management Commission
Page of 23

Permit NC0003425
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked
As of this permit issuance, any previously issued permit bearing this number is no longer effective
Therefore, the exclusive authority to operate and discharge from this facility arises under the permit
conditions, requirements, terms, and provisions included herein
Duke Energy Progress, LLC is hereby authorized to:
Continue to operate the following systems located at Roxboro Steam
Electric Generating Plant off NCSR 1377 near Roxboro in Person County.
• Outfall 001 Continue to d scharge stormwater and seeps from the ash
landfill and gypsum pile area into Hyco Reservoir
■ Ash Pond Treatment System (Internal Outfall 002). Continue to discharge
ash transport water, low vclume wastewater, runoff from the ash landfill, dry
fly ash handling system wash water, ash silo wash water, storm water runoff,
cooling tower blowdown frcm unit number 4, emergency overflow of FGD
system blowdown, anhydrous ammonia testing waters and emergency flows
and domestic sewage treatment plant effluent. Effluent'from the ash pond
discharges to the heated water discharge canal, and is ultimately released
into Hyco Reservoir through Outfall 003.
■ Heated Water Discharge Canal System (Outfall 003). Continue to
discharge once through cooling water, stormwater runoff, flue gas
desulfurization treated wastewater, flue gas desulfurization cooling water,
seepage from ash pond darn and the effluent from the ash pond (Outfall 002)
into Hyco Reservoir.
■ (Internal Outfall 005) Continue to
Cooling Tower Blowdown System
discharge cooling tower blowdown from unit number 4 into the ash transport
system, and ultimately into the ash pond (Outfall 002) or into the discharge
canal
• Coal Pile Runoff Treatment System (Outfall 006). Continue to discharge
runoff from the coal pile and other coal handling areas, including the
limestone and gypsum piles and the truck wheel wash water These waters
are routed to a retention pond for treatment by neutralization, sedimentation,
and equalization prior to being discharged directly into Hyco Reservoir.
■ Domestic Wastewater Treatment System (Internal Outfall 008).
Continue to discharge effluent from the treatment system flows into the ash
pond
■ Chemical Metal Cleaning Treatment System (Internal Outfall 009)
Continue to discharge chemical metal cleaning wastes into the ash pond or
the low volume waste treatment system
■ Flue Gas Desulfurization Treatment System (Internal Outfall 010).
Continue to operate a FGD wet scrubber treatment system consisting a
settling pond and a bzore actor, discharging into the discharge canal
■ Flue Gas Desulfurization Treatment System (Internal Outfall 011). Upon
completion of construction operate a Flue Gas Desulfurization System
discharging to the low volume waste treatment system or the discharge
canal
■ Low Volume Wastes Treatment System (Internal Outfall 012). Upon
completion of construction of a dual retention ponds treatment system
discharge low volume wastes, metal cleaning wastes, dry fly ash handling
system wash water, ash silo wash water, emergency overflow of FGD system
Page 2 of 23

Permit NC0003425
blowdown, anhydrous ammonia testing waters and emergency flows,
domestic sewage treatment plant effluent, and storm water runoff through
outfall 012 to the discharge canal
2. Discharge from said treatment works and/or outfalls at the locations specified on
the attached map into the Hyco Reservoir, classified as WS -V & B waters in the
Roanoke River Basin.
Page 3 of 23

Permit NC0003425
Part I
A. (1) Effluent Limitations and Monitoring Requirements (Outfall 00 1) [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 (Stormwater and seeps). Such
discharges shall be limited and monitored' by the Permittee as specified below
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow, MGD
Monthly/Quarterly3
Estimate
Effluent
H2
Month' Quarterly3
Grab
Effluent
Fluoride, m L
1 8 mg/L 1 8 mg/L
Month' Quarterly3
Grab
Effluent
Total Arsenic, pg/L
10 pg/L 10 pg/L
Monthly Quarterly3
Grab
Effluent
Total Copper, pg/L
Monthly Quarterly3
Grab
Effluent
Total Antimony, pg/1
Monthly Quarterly3
Grab
Effluent
Total Lead, µ L
Monthly Quarterly3
Grab
Effluent
Total Selenium, µ L
5 µ L 56 µ L
Monthly/ Quarterly3
Grab
Effluent
Nitrate as N, m L
Monthly Quarterly3
Grab
Effluent
Sulfates, m L
250 in L 250 m L
Monthly Quarterly3
Grab
Effluent
TDS, m L
Monthly Quarterly3
Grab
Effluent
Hardness -Total as
CaCO3 or (Ca + M m L
Monthly/ Quarterly3
Grab
Effluent
Conductivity, µmho cm
Month' Quarterly3
Grab
Effluent
Acute Toxicrty4
Monthly Quarterly3
Grab
Effluent
Notes
1 Starting on December 21, 2016, beg_n submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
2 The pH shall not be less than 6 0 standard units nor greater than 9 0 standard units
3 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
4 Acute Toxicity (Amephales promelas, 24-hour) monitoring shall be performed in accordance
with Special Condition A. (14) of�this permit
If the facility is unable to obtain a sample due to the dry or low flow conditions
preventing the facility from obtaining a representative sample, then "no flow" should be
reported on the DMR. This requirement is established in the Section D of the Standard
Conditions and 40 CFR 122.41 (j).
There shall be no discharge of floating solids or visible foam in other than trace amounts
Page 4 of 23

Permit NC0003425
A. (2) Effluent Limitations and Monitoring Requirements (Outfall 002 - normal
operation - decanting phase) [ 15A NCAC 02B 0400 et seq , 02B .0500 et seq ]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Internal Outfall 002 (Ash Pond Treatment System
to the Heated Water Discharge Canal - Decanting of 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
CHARACTERISTICS
LIMITS
Monthly
Average
Daily
Maximum
MONITORING REQUIREMENTS
Measurement Sample Sample
Frequency Type Location
Flow
Daily
Continuous
Effluent
Total Selenium
Monthly
Grab
Effluent
Oil and Grease
15 0 m L
20 0 m L
2 Month
Grab
Effluent
Total Suspended Solids3
30 0 m L
100 m L
2 Month
Grab
Effluent
Turbidrty4, NTU
Monthly
Grab
Effluent
H5
Between 6 0 and 9 0 Standard Units
Monthly
Grab
Effluent
Notes:
1 Starting on December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system. Please See Special Condition A
(29)
2 Samples taken in compliance with the monitoring requirements listed above shall be taken
at the ash pond discharge prior to mining with other sources of wastewater
3 The facility shall continuously monitor TSS concentratit n when the decanting process
commences and the dewatering pump shall be shutoff automatically when the one half of
the Daily Maximum lin ut (15 minutes average) iq exceeded Pumping will be allowed to
continue if interruption might result in a dam failure or damage. The continuous TSS
monitoring only required when the pumps are employed for decanting
4 The net turbidity shall not exceed 50 NTU using a grab sample and measured by the
difference between tie effluent turbidity and the background turbidity The sample for the
background turbidity'shall be taken at point in the receiving waterbody upstream of the
discharge location, and`the background turbidity and the effluent turbidity samples shall be
taken within the same 24 hour period
NTU - Nephelometric Turbidity Unit
5 The facility shall continuously monitor pH when the decanting process commences and the
decanting pump shall be shutoff `automatically when 15 minutes running average pH falls
below 6%1 `standard urns or rises abbye 8 9 standard units Pumping will be allowed to
continue if interruption might result in a dam failure or damage
The low volume waste shall be discharged to the ash pond treatment system until new
treatment system is in operation.
By November 1, 2018 there shall be no discharge of pollutants in fly ash transport waters This
requirement only applies to fly ash ash transport water generated after November 1, 2018
By April 30, 2021 there shall be no discharge of pollutants in bottom ash transport waters This
requirement only applies to bottom ash transport water generated after November 1, 2018
The facility is allowed to drawdown the wastewater in the ash pond to no less than three
feet above the ash.
The level of water in the ash pond should not be lowered more than 1 ft/week, unless
approved by the DEQ Dam Safety Program.
Page 5 of 23

Permit NC0003425
The facility shall use a floating pump station with free water skimmed from the basin
surface using an adjustable weir.
The limits and conditions in Section A. (3) of the permit apply when water in the ash
settling basin is lowered below the three feet trigger mark.
The facility shall notify DWR Complex NPDES Permitting Unit and DWR Raleigh Regional
Office seven calendar days prior to the commencement of the decanting.
Page 6 of 23

Permit NC0003425
A. (3) Effluent Limitations and Monitoring Requirements (Outfall 002 -
dewatering phase) [15A NCAC 02B 0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Internal Outfall 002 (Ash Pond Treatment System
Dewatering - removing the interstitial water) 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
Fre uency
Ty a
Location
Flow
Total Selenium
1 MGD
Weekl
Continuous
Effluent
Total Arsenic
Weekl
Grab
Effluent
Total Mercury
Weekl
Grab
Effluent
Total Molybdenum
Weekl
Grab
Effluent
Total
Weekl
Grab
Effluent
Total C
Copper
er
Weekl
Grab
Effluent
Oil and Grease
15 0 m L� , 20 0 m L
Weekl
Weekly
Grab
Grab
Effluent
Effluent
Total Suspended Solids
30 0 m L 100 m L
Weekl
Grab
Effluent
Turbid1ty3, NTU
Monthly
Grab
Effluent
pH4
Between 6 0 and 9 0 Standard
Monthly y
Grab
Effluent
Notes:
1 Starting on December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system PIease See Special Condition A
(29)
2 Effluent sampling shall be conducted at`the discharge from the ash settling pond prior to
mixing with any Ether waste stream
3 The net turbidity sh;�tl not exceed 50 NTU using a grab sample and measured by the
difference between the,effluent turbidity and `the background turbidity The sample for the
background turbidity shall be taken at point in the receiving waterbody upstream of the
discharge location, and the background turbidity and the effluent turbidity samples shall be
taken within the same 24 hour period
NTU,, Nephelometric Turbidity Unit.
4 The facility shall continuOUsly monitor pH when the decanting process commences and the
decanting pump shall be shutoff automatically when 15 minutes running average pH falls
below 6 1 standard urns or rises above 8 9 standard units Pumping will be allowed to
continue if interruption might result in a dam failure or damage
There shall be no discharge of floating solids or visible foam in other than trace amounts
By November 1, 2018 there shall be no discharge of pollutants in fly ash transport waters This
requirement only applies to fly ash transport water generated after November 1, 2018
By April 30, 2021 there shall be no discharge of pollutants in bottom ash transport waters This
requirement only applies to fly ash transport water generated after November 1, 2018
The level of water in the ash pond should not be lowered more than 1 ft/week, unless
approved by the DEQ Dam Safety Program.
The facility shall use a floating pump station with free water skimmed from the basin
surface using an adjustable weir.
Page 7 of 23

Permit NC0003425
A. (4) 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 the permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 003 (Heated Water Discharge Canal System
to the Hyco Reservoir). Such discharges shall be limited and monitored, by the Permittee as
specified below
EFFLUENT
CHARACTERISTICS
Monthly
Average
LIMITS
Daily
Maximum
MONITORING REQUIREMENTS
Measurement Sample Sample
Frequency Tye Location
Flow
Daily
Calculation
Effluent
Total Residual
Chlorme3
28 µg/L
2/Mdrith
Grab
Effluent
Total Phosphor -us
Monthly
Grab
Effluent
Total Nitrogen
Monthly
Grab
Effluent
Temperature 4
Continuous
Recorder
Effluent, 4C4, 4D4
Total Arsenic
Quarterly
Grab
Effluent
Total Selenium
Quarterly
Grab
Effluent
Chloride
Quarterly
Grab
Effluent
Total Thallium
Quarterly
Grab
Effluent
pH5
Weekly
Grab
Effluent
Ammonia6
1 0 mg/l
5 mg/1
Daily
drab
Effluent
Acute Toxicit 7
Quarterly
Composite
Effluent
Hardness -Total as
[CaCO3 or (Ca + Mg)]
Quarterly
Grab
4C, 4D
Notes:
1 Starting on December 21, 2016, beg_n submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
2 Effluent sampling shall be performed in the discharge canal at the point of discharge into
Hyco Reservoir Stations 4C and 41; are shown on the Hyco Reservoir Sampling Map
(attached)
3 Total Residual Chlorine compliance is required only if chlorine or chlorine derivative is
added to the cooling water,, The Div sion shall consider all effluent TRC values reported
below 50 µg/ L to be in compliance lAith the permit However, the permittee shall continue
to record and submit all values reported by a North Carolina certified laboratory (including
field certified), even if these values fall below 50 pg/L
4 The Permittee shall operate so as to`remain in compliance with the conditions outlined in
the mixing zone defined in Special Condition A (17) of this permit The temperature of Hyco
Reservoir at no time shall exceed the thermal water quality standard outside the mixing
zone defined in Special Condition A (17) Continuous monitoring in the mixing zone shall
be at a point between Stations 4C and 4D as shown on the Hyco Reservoir Sampling Map
(attached) These thermal limitations may be deleted or revised, as appropriate, based
'upon evaluation of the results of the thermal studies
5 The pH shall not be less than 6 0 standard units nor greater than 9 0 standard units
6 Ammonia limit and monitoring is only applicable in the event of an emergency release of
anhydrous ammonia during the time the released waters are discharged through outfall
003
7 Acute Toxicity (Amephales promelas) P/F @ 90%, March, June, September and December
See Special Condition A (14) of this permit Composite samples for this effluent
characteristic shall consist of 24 or more grab samples of equal volumes collected at equal
intervals over a 24-hour period
The Permittee is allowed to operate Unit 3 in a once -through cooling mode from October 15
through April 30
Page 8 of 23

Permit NC0003425
There shall be no discharge of floating solids or visible foam in other than trace amounts
outside a distance five (5) meters from the discharge pipe
A. (5) Effluent Limitations and Monitoring Requirements (Internal Outfall 005)
11 SA NCAC 02B 0400 et seq , 02B 0500 et seq ]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Internal Outfall 005 (Cooling Tower Slowdown to
the ash pond) 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
Location2
Flow
Continuous
durin discharge
pump Logs
Effluent
Free Available Chlorine3
200 µg/L
500 µg/L
2/month
Multiple
Effluent
Grabs
Total Residual Chlorme3
Monthly
Multiple
Effluent
Grabs
Total Chromium4
200 µ L 200 µ L
2/Month
Composite
Effluent
Total Zmc4
1 0 m L l n m L
2/Month
Composite
Effluent
The 126 Priority Pollutants
(40 CFR Part 423, Appendix
A) Exclusive of Zinc and
No betectable Amount
Annual
Grab
Effluent
Chromium4
Notes:
1 Starting on 'December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system. Please See Special Condition A
(29)
2 Effluent sampling shall be conducted at the discharge from the cooling tower prior to mixing
with other waste streams Samples taken in compliance with the monitoring requirements
listed above shall be taken prior to mixing with other sources of wastewater
3 Neither free available chlohne nor total _residual chorine may be discharged from any single
generating unit for more than two hours per day, unless the Permittee demonstrates to the
Division that discharge for more than two hours is required for macromvertebrate control
The 500 µg/L is a daily maximum limitation and is to be measured during the chlorine
release pgriod The 200 µg/L limitation is an average during the chlorine release period
Monitoring is required only when chlorine is added to the cooling water system
4 These limitations and monitoring requirements apply if these substances are added by the
Permittee for cooling tower maintenance There shall be no detectable amounts of the 126
priority pollutants (40 CFR 423 Appendix A) contained in chemicals added for cooling tower
except for total chromium and total zinc Compliance with the limitations for the 126
priority pollutants in 40 CFR Section 423 13(d)(1) may be determined by engineering
calculations which demonstrate that the, regulated pollutants are not detectable in the final
discharge by the analytical methods in 40 CFR Part 136
Discharge of blowdown from the cooling tower is defined as the minimum discharge of
recirculation water necessary for the purpose of discharging materials contained in the process,
the further build-up of which would cause concentration in amounts exceeding limitations
established by best engineering practice
The Permittee is authorized to discharge Maintenance Drain wastewater from the Cooling Tower
for Unit 4 directly to the discharge canal Grab samples of the following parameters are to be
collected prior to mixing with other waste streams and the results shall be submitted to DWR
pH (SU), flow' (MGD) and total residual chlorine (mg/L) The Permittee shall notify the Division
Page 9 of 23

Permit NC0003425
of Water Resources, Raleigh Regional Office, prior to draining the cooling tower, except during
non -office hour emergencies when notification must be made the next working day Total
residual chlorine monitoring is required prior to a maintenance drain of the Unit 4 Cooling
Tower only if chlorine is added to the system
A. (6) Effluent Limitations and Monitoring Requirements (Outfall 006) [15A
NCAC 02B 0400 et seq., 02B .0500 et seq ]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 006 (Coal Pile Runoff Treatment System to
the Hyco Reservoir). Such discharges shall be limited and monitored' by the Permittee as
specified below
Notes:
1 Starting on December 21, 2016, begin subrmtting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
2 Effluent sampling shall be conducted at'the point of discharge into Hyco Reservoir Samples
taken in compliance with the inonitormg,requfi-ements listed above shall be taken prior to
mixing with other sources of wastewater "
3 The pH shall not be less than 6.0 standard `units nor greater than 9 0 standard units
4 Acute Toxicity (Prmephales promelas, 24-hour) monitoring shall be performed in accordance
with Special Condition A (15) of this,permit
There shall be no discharge of floating solids or visible foam in other than trace amounts
outside a distance five (5) meters fro'lij the discharge pipe
Material storage runoff shall include rainfall to navigable waters through any discernable,
confined and/or discrete conveyance frcm, or through, coal
Page 10 of 23
LIMITS
MONITORING
REQUIREMENTS
EFFLUENT
CHARACTERISTICS
Monthly
Instantaneous
Measurement
Type
Sample
Average
Maximum
__FrequencySample
Location2
Flow
2/Month
Estimate
'Effluent
Total Suspended
30 mg/ L
50 mg/L
2 / Month
Grab
Effluent
Solids
Total Selenium
Quarterly
Grab
Effluent
pH3
We6kly
Grab
Effluent
Acute Toxicity4
Annually
Grab
Effluent
Notes:
1 Starting on December 21, 2016, begin subrmtting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
2 Effluent sampling shall be conducted at'the point of discharge into Hyco Reservoir Samples
taken in compliance with the inonitormg,requfi-ements listed above shall be taken prior to
mixing with other sources of wastewater "
3 The pH shall not be less than 6.0 standard `units nor greater than 9 0 standard units
4 Acute Toxicity (Prmephales promelas, 24-hour) monitoring shall be performed in accordance
with Special Condition A (15) of this,permit
There shall be no discharge of floating solids or visible foam in other than trace amounts
outside a distance five (5) meters fro'lij the discharge pipe
Material storage runoff shall include rainfall to navigable waters through any discernable,
confined and/or discrete conveyance frcm, or through, coal
Page 10 of 23

Permit NC0003425
A. (7) Effluent Limitations and Monitoring Requirements (Internal Outfall 008)
[ 15A NCAC 02B 0400 et seq, 02B 0500 et seq ]
During the period beginning on the effective date of the permit and lasting until expansion to
0 025 MGD or expiration, the Permittee is authorized to discharge from Internal Outfall 008
(Domestic Wastewater Treatment System). Such discharges shall be limited and monitored'
by the Permittee as specified below
Notes:
1 Starting on December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system. Please See Special Condition A
(29)
2 Samples taken in compliance with the monitoring requirements listed above shall be taken
after treatment and prior to mixing with other sources of wastewater
3 The pH shall not be less than 6 0 standard units, nor greater than 9 0 standard units
See Special Condition A (22).
A. (8) Effluent Limitations and Monitoring Requirements (Internal Outfall 008)
[15A NCAC 02B 0400 et seq., 02B 0500 et seq ]
During the period beginning upon expansion to 0.025 MGD and lasting until expiration, the
Permittee is authorized to discharge from Internal Outfall 008 (Domestic Wastewater
Treatment System). Such discharges shall be limited and monitored' by the Permittee as
specified below
DAILY MAXIMUM
MONITORING REQUIREMENTS
MONITORING REQUIREMENTS
EFFLUENT
Monthly
Daily
Measurement
Sample Type
Sample
CHARACTERISTICS
Average
Maximum
Fre uency �T
Location
Location
Flow
0 015 MGD
Annual
Annual
Pump Los
Effluent
Biochemical Oxygen
Biochemical Oxygen
30 0 mg/ L
45 0 mg/ L
Annual
Grab
Effluent
Demand 5 -day @ 20°C
Total Suspended Solids
30 0 m L
45 0 m L
Annual
Grab
Effluent
Total Ammonia as N
Annual
Annual
Grab
Effluent
Annual
Annual
Grab
Effluent
H3
Fecal Coliform
200 100 ml
400/100 ml
Annual
Grab
Effluent
Notes:
1 Starting on December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system. Please See Special Condition A
(29)
2 Samples taken in compliance with the monitoring requirements listed above shall be taken
after treatment and prior to mixing with other sources of wastewater
3 The pH shall not be less than 6 0 standard units, nor greater than 9 0 standard units
See Special Condition A (22).
A. (8) Effluent Limitations and Monitoring Requirements (Internal Outfall 008)
[15A NCAC 02B 0400 et seq., 02B 0500 et seq ]
During the period beginning upon expansion to 0.025 MGD and lasting until expiration, the
Permittee is authorized to discharge from Internal Outfall 008 (Domestic Wastewater
Treatment System). Such discharges shall be limited and monitored' by the Permittee as
specified below
Notes:
1 Starting on December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
2 Samples taken in compliance with the monitoring requirements listed above shall be taken
after treatment and prior to mixing with other sources of wastewater
3 The pH shall not be less than 6 0 standard units, nor greater than 9 0 standard units
Page 1 1 of 23
DAILY MAXIMUM
MONITORING REQUIREMENTS
EFFLUENT
Monthly
Daily
Measurement
Sample Type
Sample
CHARACTERISTICS
Average
Maximum
Fre uency
Location
Flow
0.025 MGD
Annual
Pump Los
Effluent
Biochemical Oxygen
30.0 mg/ L
45 0 mg/ L
Annual
Grab
Effluent
Demand 5 day 20°C
Total Suspended Solids
130 0 m L
45 0 m L
Annual
Grab
Effluent
Total Ammonia as N
Annual
Grab
Effluent
pH3
Annual
Grab
Effluent
Fecal Coliform
200/100 ml
400/ 100 ml
Annual
Grab
Effluent
Notes:
1 Starting on December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
2 Samples taken in compliance with the monitoring requirements listed above shall be taken
after treatment and prior to mixing with other sources of wastewater
3 The pH shall not be less than 6 0 standard units, nor greater than 9 0 standard units
Page 1 1 of 23

Permit NC0003425
See Special Condition A (22)
A. (9) Effluent Limitations and Monitoring Requirements (Internal Outfall 009)
[ 15A NCAC 02B 0400 et seq, 02B 0500 et seq ]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Internal Outfall 009 (Metal Cleaning Wastes) Such
discharges shall be limited and monitored' by the Permittee as specified below
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly Daily
Average Maximum
Measurement Sample Type sample
2
Frequency Location
Flow
Monthly
Once per,.Discharge Event
sump reading gs or
Outfall 002
Total Suspended Solids
30 0 mg/L
100 mg/L
Once per Discharge Event
Grab
Outfall 002
Oil and Grease
15 0 mg/L
20 0 m L
Once per Dischar e Event
Grab
Outfall 002
Total Copper
1 0 mg/L
1 0 mg/L
Once per Discharge Event
Grab
Outfall 002
Total Iron
1 0 mg/L
1 0 mg/L
Once per Discharge Event
Grab
Outfall 002
Notes:
1 Starting on December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMk application system. Please See Special Condition A
(29)
2 Samples taken in compliance with the monitoring requirements listed above shall be taken
after ash pond treatment and prior to mixing with other sources of wastewater
For the purposes of this permit, the term "Once per Discharge Event" shall mean the discharge
t
from Outfall 002 that occurs within 30 minutes from the time the fly ash containing metal
cleaning waste is discharged into the ash pond plus the calculated detention time of the ash
pond
A. (10) Effluent Limitations and Monitoring Requirements (Internal Outfall 010)
115A NCAC 02B 0400 et seq., 0213 .0500 et seq.]
During the period beginning on the'effective date of the permit and lasting until the existing
treatment system is decommissioned, the Permittee is authorized to discharge from Internal
Outfall 010 (FGD blowdown). ``Such discharges shall be limited and monitored' by the
Permittee as specified below i
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly Daily Measurement Fre Sample T;peT Sample
Average TMaximum uency Location
Flow
Monthly
Flusimilar or
s
Effluent
Total Suspended Solids
30 mg/l
1C0 mg/1
Quarterly
Grab
Effluent
Oil and grease
15 mg/1
20 m /l
Quarterly
Grab
Effluent
Total Arsenic 3
8 µg/l
11 µ l
Quarterly
Garb
Effluent
Total Mercury 3
356 ng/l
7£,8 ng/1
Quarterly
Grab
Effluent
Total Selenium 3
12 µ /l
23 pg/l,
Quarterly
Grab
Effluent
Nitrate Nitrite as N 3
4 4 mg 1
17 mg/l
Quarterly
Grab
Effluent
Notes
1 Starting on December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
Page 12 of 23

Permit NC0003425
2 Samples taken in compliance with the monitoring requirements listed above shall be
taken after bioreactor treatment and prior to mixing with other sources of wastewater
3 The limits shall become effective December 23, 2023
4 The pH shall not be less than 6 0 standard units, nor greater than 9 0 standard units
A.(11) Effluent Limitations and Monitoring Requirements (Internal Outfall 011)
[I 5A NCAC 02B 0400 et seq , 02B 0500 et seq ]
During the period beginning upon the commencement of operations of the new FGD system and
lasting until expiration, the Permittee is authorized to discharge from Internal Outfall 011
(FGD blowdown) Such discharges shall be limited and monitored by the Permittee as
specified below
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly Daily Measurement Sample Type Sample
Average TMaximum Frequency Location
Flow
Monthly
Daily
Monthly
Pump Logs or
similar reading
Effluent
Total Suspended Solids
30 mg/l
100 mg/l
Quarterly
Grab
Effluent
Oil and grease
15 mg/l
20 mg/l
Quarterly
Grab
Effluent
Total Arsenic 3
8 g/1
11 µg/l
Quarterly
Garb
Effluent
Total Mercury 3
356 ng/l
788 ng/l
Quarterly
Grab
Effluent
Total Selenium 3
12 pg/l
23 µg/l
Quarterly
Grab
Effluent
Nitrate/Nitrite as N
4 4 mg/l
17 mg/l
Quarterly
Grab
Effluent
Notes:
1 Starting on December 21, 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
2 Samples taken to compliance with the monitoring requirements listed above shall be
taken afeer bi , c or tre9l,,ftent acrd prior to mining with other sources of wastewater
3 The limits shall become effective December 23, 2023
4
A. (12) Effluent Limitations `and Monitoring Requirements (Internal Outfall 012)
[ 15A NCAC 02B 0400 et seq., 02B .0500 et seq ]
During the period beginning upon the start of operation of the retention basin and lasting until
expiration, the Permittee is authorized to discharge from Internal Outfall 012 (Low volume
wastes Retention Ponds) Such discharges shall be limited and monitored ' by the Permittee
as specified below
Notes
1 Starting on December 21 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
Page 13 of 23
LIMITS
MONITORING REQUIREMENTS
EFFLUENT
CHARACTERISTICS
Monthly
Daily
Measurement
Sample Type
Sample
Average
Maximum
Fre uency
Location
Flow
Monthly
Pump Logs or
Effluent
similar reading
Total Suspended Solids
30 m /l
100 mg/l
Quarterly
Grab
Effluent
Oil and grease
15 mg/l
20 mg/l
Quarterly
Grab
Effluent
Notes
1 Starting on December 21 2016, begin submitting Discharge Monitoring Reports
electronically using NC DWR's eDMR application system Please See Special Condition A
(29)
Page 13 of 23

Permit NC0003425
2 Samples taken in compliance wrh the monitoring requirements listed above shall be
taken after retention pond and prior to mixing with other sources of wastewater
A.(13) Seeps
If new seeps to waters of the state are identified, the facility shall follow the procedures outlined
below The deadlines for new seeps shall be calculated from the date of the seep discovery The
new identified seep is not permitted until the permit is modified and the new seep included in
the permit and the new outfall established for the seep
For all new water seeps to waters of the state, the facility shall determine within 90 days from
the seep discovery if a seep meets the state water quality standards established in 15A NCAC
2B 0200 and submit the results of this determination to the Division If the standards are not
contravened, the facility shall conduct monitoring for the parameters specified in A (1)
If any of the water quality standards are exceeded, the facility shall be considered in violation of
the Clean Water Act until one of the opt ons below is fully implemented The facility shall
1) Submit a complete application fcr 404 Permit (within 30 days after determining that a
water quality standards is exceeded) to pump the seep discharge to one of the existing
outfalls, install a pipe to discharge the seep to the Catawba River, or install an in-situ
treatment system After the 404 Permit is obtained, the facility shall complete the
installation of the pump, pipe, or treatment system within 180 days from the date of the
404 permit receipt and begin pumping/ discharging or treatment
2) Demonstrate through modeling that the decanting and dewatering of the ash basin will
result in the elimination of the seep and submit the modeling results to the Division
within 120 days from the seep discovery, Within 180 days from the completion of the
dewatering the facility shall confrm that the seep flow ceased If the seep flow
continues, the facility shall choose one of the other options in this Special Condition
3) Demonstrate that the seep is diszhargmg >4rough the designated "Effluent Channel" or
permitted outfall and the water quality standards in the receiving stream are not
contravened This demonstratior should be submitted to the Division no later than 180
days from the seep discovery. The "Effluent Channel" designation should be established
by the DEQ Regional Office personnel prior to the issuance of the permit and appropriate
4Q4, permit shall be obtained
All effluent limits, including water quality -based effluent limits, remain applicable
notwithstanding any action by the Permittee to address the violation through one of the
identified options, so that any discharge in exceedance of an applicable effluent limit is a
violation of the Permit as long as the seep remains flowing
Page 14 of 23

Permit NC0003425
A. (14) Acute Toxicity Testing PASS/ FAIL Permit Limit Outfalls 001 and 003 [ 15A
NCAC 02B 0200 et seq ]
The Permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in
the North Carolina Procedure Document entitled "Pass/ Fail Methodology For Determining Acute
Toxicity In A Single Effluent Concentration" (Revised -December 2010 or subsequent versions)
The monitoring shall be performed as a Fathead Minnow (Pimephales promelas) 24 hour static
test The effluent concentration at which there may be at no time significant acute mortality is
90% (defined as treatment two in the procedure document) The tests will be performed during
the months of 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
The Permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in
the North Carolina Procedure Document entitled "Pass/Fail Methodology For Determining Acute
Toxicity In A Single Effluent Concentration" (Revised December. 2010 or subsequent versions)
The monitoring shall be performed as a Fathead Minnow (Amephales promelas) 24 hour static
test The effluent concentration at which there maybe at no time significant acute mortality is
90% (defined as treatment two in the procedure document) The tests will be performed during
the months of March, June, September and December. These months signify the first month of
each three month toxicity testing quarter assigned to the facihty 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
The parameter code for Pimephales promelas is TGE6C All toxicity testing results required as
part of this permit condition will be entered on the Effluent Discharge Form (MR -1) for the
month in which it was performed, using the appropriate parameter code Additionally, DWR
Form AT -2 (original) is to be sent to the following address.
Attention. North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, North Carolina 27699-1623
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later
than 30 days after the end of the -'reporting period for which the report is made
Test data shall be complete and accurate and include all supporting chemical/ physical
measurements performed in associatiori`with the toxicity tests, as well as all dose/response
data Total residual chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the waste stream
Should there be no discharge of flow from the facility during any month, the Permittee will
complete the information` -located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the
notation of "No Flow" in the comment area of the form The report shall be submitted to the
Water Sciences Section at the address cited above
Should the Permittee fail to monitor during a month in which toxicity monitoring is required,
then monthly monitoring will begin immediately Upon submission of a valid test, this monthly
test requirement will revert to quarterly in the months specified above
Should any test data, from either these monitoring requirements or tests performed by the North
Carolina Division of Water Resources indicate potential impacts to the receiving stream, this
permit may be re -opened and modified to include alternate monitoring requirements or limits
Page 15 of 23

Permit NC0003425
NOTE Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid
test and will require immediate follow-up testing to be completed no later than the last day of
the month following the month of the initial monitoring
A. (15) Acute Toxicity Monitoring (ANNUAL) Outfall 006 [ 15A NCAC 02B 0200 et
seq ]
The permittee shall conduct annual acu-e toxicity tests using protocols defined as definitive in
EPA Document EPA -821 R-02-012 entit ed "Methods for Measuring the Acute Toxicity of
Effluents and Receiving Waters to Freshwater and Marine Organisms " The monitoring shall be
performed as a Fathead Minnow (Amephales promelas) 48 hour static test Effluent samples
for self-monitoring purposes must be obtained during representative effluent discharge and
shall be performed at the NPDES permitted final effluent discharge below all waste treatment
processes
The parameter code for Pimephales promelas is TAA6C All toxicity testing results required as
part of this permit condition will be entered on the Effluent Discharge Form (MR -1) for the
month in which it was performed, using the appropriate parameter code Additionally, DWR
r
Form AT -1 (original) is to be sent to the -ollowing address
Attention North Carolina Division 6rWater Resouzces
Wa er Sciences Section/Aquatic Toxicology Branch
16.3 Mail Service Center
RaLigh, North Carolina 27699 1623
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later
than 30 days after the end of the reporting period for which the report is made
Test data shall be complete and accurate and include all supporting chemical/ physical
measurements performed in association with the toxicity tests, as well as all dose/response
data Total residual chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the waste stream
Should there be no discharge of flow from the facility during any month, the permittee will
complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the
notation of 'No Flow" in the comment area of the form The report shall be submitted to the
Water Sciences Section at the `address c ted above
Should any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Water Resources indicate potential impacts to the receiving stream, this
permit may be re -opened and modified to include alternate monitoring requirements or limits.
NOTE Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid
test and will require immediate follow up testing to be completed no later than the last day of
the month following the month of the initial monitoring
A. (16) Intake Screen Backwash Condition
Continued intake screen backwash discharge is permitted without limitations or monitoring
requirements
Page 16 of 23

Permit NC0003425
A. (17) Temperature Requirements (Outfall 003 Mixing Zone)
a Water quality standards for temperature for lower piedmont waters (32° C) will not apply
within a mixing zone, which shall include the North Hyco arm downstream of NC Highway
57, the main body of Hyco Reservoir downstream of the confluence of the Cobbs Creek
Arm and the North Hyco Arm, and the entire afterbay lake The area described does not
include the South Hyco Arm or the first finger arms on the west side of the reservoir lying
upstream of the dam Water within the main lake and the afterbay lake to Hyco River shall
comply with water quality standards except the temperature standards in the areas of the
lake defined herein as a mixing zone Water discharged from the afterbay shall comply
with the temperature standard
b Temperature measurements made to monitor compliance with this provision shall be
made at least six inches, but not more than one foot, .below the surface of the lake A
monthly average temperature shall consist' of at least five determinations conducted on
five separate days
c Temperature increases shall be determined as the increase in temperature above the
temperature measured at the confluence of the two southern finger arms on the north
side of the lake (Lat 36 51'11, Long 79 06629) ieplort
d A summary of the temperature monitoring results pursuant to A�(a through c shall
be submitted to the Division with the annual Biological Monitoringdue by July 31
of the following year
A. (18) Biological and Instream Monitoring
In accordance with the previously submitted biological monitoring program (as approved by the
Director of the Division, and as it may be amended), the Permittee shall submit results of
biological studies and monitoring programs by July 31 of the following year The following
parameters shall be included in the surface water sampling protocol total arsenic, total selenium,
total mercury (method 1631E), total chromium, total lead, total cadmium, total copper, total
hardness, and total zinc. For fish tissue samplmg the following parameters shall be included
arsenic, selenium and,mercury
Copies of all the study plans, study results, anc 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
1621 Mail Service Center
Raleigh, NC 27699 1623
A. (19) Applicable State Law
This facility shall meet the requirements of Senate Bill 729 (Coal Ash Management Act). This
permit may be reopened to include new requirements imposed by Bill 729
A. (20) PCB Prohibition
There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used
for transformer fluid
Page 17 of 23

Permit NC0003425
A. (21) Limitations Reopener
The permit shall be modified, or revokes and reissued, to comply with any applicable effluent
guideline or water quality standard issuad or approved'under sections 302(b)(2)(c) and (d),
304(b)(2) and 307(a) of the Clean Water Act, if the effluent guideline or water quality standard so
issued or approved
a Contains different conditions or -s otherwise more stringent than any effluent limitation
in the permit, or
b Controls a pollutant not limited in the permit
The permit as modified or reissued under this paragraph shall also contain any other
requirements in the Act then applicable.
A. (22) Domestic Wastewater Treatment Plant
The permittee shall at all times properly operate and maintain the domestic wastewater treatment
plant to meet secondary standards as specified for internal outfall 008
A. (23) Bioreactor Condition
An operation and maintenance plan, including a monitoring regimen for the bioreactor units and
an emergency response plan in the ev,-nt of an upset, shall be maintained and available for
inspection by Division personnel
A. (24) Ash Pond Closure
The facility shall prepare an Ash Ponds Closure Plan This Plan shall be submitted to the Division
one month prior to the closure of ash ponds
A. (25) Groundwater Monitoring Well Construction And Sampling
The permittee shall conduct groundwater monitoring to determine the compliance of this NPDES
permitted facility with the current groundwater Standards found under 15A NCAC 21, 0200 The
monitoring shall be conducted in accordance with the Sampling Plan approved by the Division
See Attachment 1. ".
A. (26) Clean Water Act Section 316(b)
The permittee shall comply with the Cooling Water Intake Structure Rule per 40 CFR 125 95
The permittee shall submit all the matenals required by the Rule with the next renewal
application
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 18 of 23

Permit NC0003425
A. (27) Structural Integrity Inspections of Ash Pond Dam
The facility shall meet the dam design and dam safety requirements per 15A NCAC 2K as
amended by statute
A. (28) Biocide Condition
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. (29) 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 and specify that, if a state does 'not establish a system to receive such
submittals, then permittees must submit monitoring data and reports electronically to the
Environmental Protection Agency (EPA) The final NPDES Electronic Reporting Rule was
adopted and became effective on December 21, 2015
NOTE This special condition supplements or supersedes {the following sections within Part II of
this permit (Standard Conditions for NPDES Permits)
e Section B (11) Signatory Req
uiremeits
• Section D (2) Reporting
• Section D (6) Records Retention
• Section E (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D (2.) and Section E. (5.1 fall
Effective December 21, 2016, the permittee s17all report discharge monitoring data
electronically using the 14C 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 tlsmg 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=pnnting, signing, and submitting one signed original and a copy of the
computer printed eDMR to the following address
NC DENR / Division of Water Resources / Water Quality Permitting Section
ATTENTION Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699 1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to
the facility being physically located in an area where less than 10 percent of the households
have broadband access, then a temporary waiver from the NPDES electronic reporting
requirements may be granted and discharge monitoring data may be submitted on paper
DMR forms (MR 1, 1 1, 2, 3) or alternative forms approved by the Director Duplicate signed
Page 19 of 23

Permit NC0003425
copies shall be submitted to the mailing address above See "How to Request a Waiver from
Electronic Reporting" section below
Regardless of the submission metho3, 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 froth 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 recip_ent 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 subm scion and for each state Instructions on how to access
and use the appropriate electronic reporting tool will be available as well Information on
EPA's NPDES Electronic Reporting Rule is found at
http //www2 ma &Y/compliance/final-nat3bnal-pollutant-discharL-e-elimination-system-
4�
Electronic submissions must start by the dates listed in the "Reporting Requirements"
section above
t
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
Page 20 of 23

Permit NC0003425
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 / /deg 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 122.221 NO OTHER STATEMENTS OF
CERTIFICATION WILL BE ACCEPTED
U certify, under penalty of law, that this document and all attachments were prepared under
my direction or supervision in accordance iijith 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 1 am aware that there are significant penalties for submitting false
information, including the possibility offines and imprisonment for knowing isolations "
5. Records Retention (Supplements Section D (6.)l
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,`ij.
A. (30) Additional Conditions and Definitions
The following special conditions are applicable to all outfalls regulated by this permit
a) Nothizig contained in this permit shall be construed as a waiver by the permittee of any
right to a hearing it may have pursuant to State or Federal laws or regulations
b) Discharge of any waste resulting from the combustion of toxic or hazardous waste to any
waste stream which ultimately discharges to waters of the United States is prohibited,
unless specifically authorized in this permit
c) The permittee shall report all visible discharges of floating materials (such as an oil slick)
to the Director when submitting DMRs
d) "Upset," means an exceptional incident in which there is an unintentional and
temporary non compliance with technology based effluent limitations because of factors
beyond the reasonable control of the permittee An upset does not include
noncompliance to the extent cause by operational error, improperly designed treatment
facilities, inadequate treatment facilities, lack of preventative maintenance, or improper
operations
e) All flows shall be reported on monthly DMRs Should no flow occur during a given
month, the words "no flow" should be clearly written on the front of the DMR
f) EPA methods 200 7 or 200 8 (or the most current versions) shall be used for analyses of
all metals except for total mercury
g) 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 �))
Page 21 of 23

Permit NC0003425
h) 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)).
i) 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))
�) The term metal cleaning waste means any wastewater resulting from cleaning [with or
without chemical cleaning compDunds] any metal process equipment including, but not
limited to, boiler tube cleaning, boiler fireside cleaning, and air preheater cleaning (40
CFR 423 11 (d)).
k) 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.
Page 22 of 23

NMIt NCO0 '034,325
DTAe f I(I rgy Progress Rork oro Facility
Person, C'oLluly Facility Location
'Receiving Stream Hyco R(�r\xo -r Strewn Class v95 V '4
Sub-gasirn 0% 02 05 State i5xid QZ?Nr,?O s H
DIVairiage Basun Rcrdr.Je R�Vjr N
Outfall A01. tat7tude 3,6- z9 10 Tt ongjtudq W9' N �
Outfall, O03 latitud, 2V 28" 48 WrIpLude 7W 05 jr
Outfall 006 L,qtttL)CTQ W 19'13 LoneMude79°04 47, NPDE'S Permlt.NCOQ03425

Nyco Reservoir Sampling Locations

Attachment 1
GROUNDWATER MONITORING PLAN
The permittee shall conduct groundwater monitoring as may be required to determine the compliance of
this NPDES permitted facility with the current groundwater Standards found under 15A NCAC 2L .0200.
1. WELL CONSTRUCTION
a. Monitoring wells shall be constructed in accordance with 15A NCAC 02C .0108
(Standards of Construction for Wells Other than Water Supply) and any other
jurisdictional laws and regulations pertaining to well construction.
b. Monitoring wells must be constructed by a North Carolina Certified Well
Contractor, the property owner, or the property lessee according to General
Statutes 87-98.4. If the construction is not performed by a certified well contractor,
the property owner or lessee, provided they are a natural person, must physically
perform the actual well construction activities.
C. Within 30 days of completion of well construction, a completed Well Construction
Record (Form GW -1) must be submitted for each compliance monitoring well to
Division of Water Resources, Water Quality Regional Operations Section
(WQROS), 1636 Mail Service Center, Raleigh, NC 27699-1636.
d. The Raleigh Regional Office, telephone number [phone], shall approve the
location of new compliance monitoring wells prior to installation. The regional
office shall be notified at least 48 hours prior to the construction of any compliance
monitoring well and such notification to the WQROS regional supervisor shall be
made from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State
Holidays.
e. All monitoring wells shall be regularly maintained. Such maintenance shall
include ensuring that the well caps are rust -free and locked at all tunes, the outer
casing is upright and undamaged, and the well does not serve as a conduit for
contamination.
f. If the Permittee intends to abandon a compliance monitoring well either
temporarily or permanently, the Permittee shall justify the abandonment and
request approval from the WQROS Regional Office within 30 business days prior
to initiating abandonment procedures.
g. Monitoring wells shall be abandoned in accordance with 15A NCAC 02C .0113
(Abandonment of Wells). Within 30 days of completion of well abandonment, a
completed Well Abandonment Record (Form GW -30) must be submitted for each
2 MAPS monitoring well to WQROS, 1636 Mail Service Center, Raleigh, NC 27699-1636.
a Updated maps shall be provided within 60 days when any of the following occur
1. Compliance monitoring wells are added or deleted from the plan.
ii The facility operation changes that would require a change in the waste
boundary, compliance boundary, or property line.
b If the map is updated, the Permittee shall submit two original copies of a site map
with an appropriate scale to easily identify all features overlaid on the most recent
aerial photograph At a muumum, the map shall include the following
information:
1. The location and identity of each monitoring well.
ii. The location of mayor components of the waste disposal system.
Ili. The location of property boundaries within 500 feet of the disposal areas
IV. The elevation of the top of the well casing (i.e., measuring point) relative
to a common datum.
NC0003425 — Roxboro
Groundwater Momtormg Plan Pagel of 3

Vi. The depth of water below the measuring point at the time the measuring
point is established.
vu. The location of compliance boundary.
viii. The date the map is prepared and/or revised.
ix. Topographic contours in no more than ten (10) foot intervals. For areas of
high relief, 20 foot intervals shall be acceptable.
C. The map and any supporting documentation shall be sent to the WQROS, 1636
Mail Service Center, Raleigh, NC 27699-1636.
3. GROUNDWATER SAMPLING AND COMPLIANCE.
a. 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) or (d) as well
as enforcement actions in accordance with North Carolina General Statute 143-
215.6A through 143-215.6C.
b. Monitoring wells shall be sampled after construction and thereafter at the
frequencies and for the parameters as specified in Part 4 of this plan. All maps,
well construction forms, well abandonment forms and monitoring data shall refer
to the permit number and the well nomenclature.
C. Per 15A NCAC 02H .0800, a Division certified laboratory shall conduct all
laboratory analyses for the required effluent, groundwater or surface water
parameters.
d. The measurement of water levels shall be made prior to purging the wells. The
depth to water in each well shall be measured from the surveyed point on the top
of the casing.
e. The measuring points (top of well casing) of all monitoring wells shall be surveyed
to provide the relative elevation of the measuring point for each monitoring well.
The measuring points (top of casing) of all monitoring wells shall be surveyed
relative to a common datum.
f. Two copies of the monitoring well sampling shall be submitted on a Compliance
Monitoring Form (GW-59CCR), and received no later than 45 days from the
sampling date. Copies of the laboratory analyses shall be kept on site, and made
available upon request. The Compliance Monitoring Form (GW-59CCR) shall
include this permit number and the appropriate well identification number. The
Compliance Monitoring Forms (GW-59CCR) shall be submitted to the Division
of Water Resources Information Processing Unit, 1617 Mail Service Center,
Raleigh, North Carolina 27699-1617
g. For groundwater samples that exceed the ground water quality standards in 15A
NCAC 02L .0202, the Regional Office shall be contacted within 30 days after
submission of the groundwater monitoring form; an evaluation may be required to
determine the impact of the waste disposal activities. Failure to do so may subject
the permittee to a Notice of Violation, fines, and/or penalties.
h. The provisions of sections 3(f) and 3(g) apply only to the sampling events
described in 3(b) above. The reporting requirements for any sampling events other
than those described in 3(b) above shall be in accordance with the general
provisions of 15A NCAC 02L.
4. MONITORING WELLS, PARAMETERS, AND SAMPLING FREQUENCY.
a. Laboratory methods shall be EPA approved and sufficient to detect constituent
quantities at or below their individual 15A NCAC 02L groundwater standards.
NC0003425 — Roxboro
Groundwater Momtonng Plan Page 2 of 3

b. The following chart contains the compliance monitoring wells to be sampled, the
parameters to be sampled, and the frequency in which the samples shall be
collected.
MONITORING
WELLS
PARAMETERS
FREQUENCY
Laboratory Parameters
Aluminum Antimony Arsenic Banum
Beryllium Boron Cadmium Calcium
Cobalt Chromium Copper Iron
Lead Magnesium Manganese Molybdenum
Mercury Nickel Potassium Selenium
Sodium Strontium Thallium Vanadium
CW -1, CW -2, CW -2D,
CW -3, CW -3D, CW -4,
CW -5, BG -1
Aril Jul
p y'
November
Zinc Chloride Sulfate Alkalinity
Bicarbonate Dissolved Total
Bicarbonate Carbonate Solids Suspended
Solids
Field Parameters
Turbidity
pH
Temperature
Specific
Conductance
Dissolved
Oxygen
Oxidation
Reduction
Potential
Water level
NC0003425 — Roxboro
Groundwater Monitoring Plan
Page 3 of 3