NC0003425_Monitoring (Report)_20190219

Permit NC0003425
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions 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 Hyco Reservoir in the Roanoke River Basin in accordance with
effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I,
II, III and IV hereof.
This permit modification shall become effective August 1, 2021.
This permit and the authorization to discharge shall expire at midnight on June 30, 2025.
Signed this day June 25, 2021.
DOCUSM^ea by:
payof
for S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page I of 29
-.A

Permit NCO003425
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this
permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive
authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and
provisions included herein.
Duke Energy Progress, LLC is hereby authorized to:
1. Continue to operate the following systems located at Roxboro Steam Electric Generating Plant off
NCSR 1377 near Roxboro in Person County:
• Outfall 001. Discharge overflow from the East Ash Basin Extension, extracted groundwater, ash
basin closure flows, and storimvater runoff into a UT to Hyco Reservoir.
• Ash Pond Treatment System (Internal Outfall 002). Continue to discharge ash transport water, low
volume wastewater, runoff from the ash landfill, dry fly ash handling system wash water, ash silo
wash water, storm water runoff, cooling tower blowdown from unit number 4, and domestic
sewage treatment plant effluent. Effluent from the ash pond discharges through an internal
conveyance to the heated discharge pond, and is ultimately released into Hyco Reservoir through
Outfall 003.
• Heated Discharge Pond (Outfall 003). Continue to discharge once -through cooling water,
stortnwater runoff, coal pile runoff, flue gas desulfurization treated wastewater, flue gas
desulfurization cooling water, ash pond dam chimney drains and other basin seepage flows,
anhydrous ammonia testing waters and emergency flows (until construction of low volume wastes
treatment system), effluent from the ash pond (Outfall 002), ash basin closure flows, and extracted
groundwater. Continue to discharge the effluent from the low volume waste treatment systems
(Outfall 012A and 012B), and yard sump overflow to the heated discharge pond. This outfall
discharges to Hyco Reservoir.
• Cooling Tower Blowdown System (Internal Outfall 005). Continue to discharge cooling tower
blowdown from unit number 4 into the low volume wastewater treatment system (outfall 012B) or
into the heated discharge pond.
• Coal Pile Runoff Treatment System (Outfall 006). Emergency overflow from the coal pile and
other coal handling areas, runoff from the limestone and emergency gypsum stack, raw water tank
drainage, incidental leakage from absorbent seats, and the truck wheel wash water. On a non -
emergency basis 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 domestic treatment system into the ash pond or the low volume waste treatment system
(Outfall 012B).
• Chemical Metal Cleaning Treatment System (Internal Outfall 009). Continue to discharge
chemical metal cleaning wastes into the low volume waste treatment system (Outfall 012).
• Flue Gas Desulfurization Treatment System (Internal Outfall 010). Continue to operate a FGD wet
scrubber treatment system consisting a settling pond and a bioreactor, discharging into the heated
discharge pond.
• 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 (outfall 012B) or the heated discharge pond.
• Low Volume Wastes Treatment System (Internal Outfall 012A). Upon construction, discharge
landfill stormwater, east ash basin closure flows, treated extracted groundwater, contact and non -
contact storm water runoff into the heated discharge pond.
• Lined Retention Basin (Internal Outfall 012B). Continue to discharge low volume wastes, metal
cleaning wastes (Internal Outfall 009), ash silo wash water, cooling water from Unit 4, anhydrous
ammonia testing waters and emergency flows, domestic sewage treatment plant effluent, domestic
W WTP effluent (Internal Outfall 008), bottom ash purge from the submerged flight conveyers
(purge volume not to exceed 10% of the water systems volume), ash landfill leachate, treated FGD
Page 2 of 29

Permit NC0003425
blowdown, storm water runoff, runoff from the coal pile and other coal handling areas, runoff from
the limestone and emergency gypsum stack, raw water tank drainage, incidental leakage from
absorbent seals, 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 to retention
basin. The retention basin discharges into the heated discharge pond.
• Emergency overflow from low volume wastewater treatment system (Outfall 012C). Continue to
discharge emergency overflow from retention basin to Hyco Reservoir.
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 29

Permit NC0003425
Part I
A. (1) Effluent Limitations and Monitoring Requirements (Outfall 001) 115A 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 (overflow from East Ash Basin Extension, and stormwater
runoff). Such discharees shall be limited and munitoredI by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow, MGD
Weekly
Estimate
Effluent
H
6.0 to 9.0 S.U.
Monthly
Grab
Effluent
TSS
30.0m /L
100.Om /L
Monthly
Grab
Effluent
Oil and Grease
15.0 m>/L
20.0 m /L
Monthly
Grab
Effluent
Fluoride
1.8m /L
1.8m /L
Month) /Week) 2
Grab
Effluent
Total Arsenic, µ L
10.0 µ /L
340.0 µ /L
Month) Weeklv2
Grab
Effluent
Total Copper, µ L
Month) / Weekl 2
Grab
Effluent
Total Antimony, µ /l
Month) Weekl 2
Grab
Effluent
Total Lead, µ /L
Monthly/ Weekl 2
Grab
Effluent
Total Selenium
5.0 µ /L
56.0 µ /L
Month) Wceklv2
Grab
Effluent
Total Barium, m /L
Month) Weekl 2
Grab
Effluent
Total Iron, µ /L
Month) Weekl 2
Grab
Effluent
Total Manganese, µ L
Month) Weekl 2
Grab
Effluent
Total Zinc, µ /L
Month) Weekl 2
Grab
Effluent
Total Nickel, jig/ L
Month) Weekl 2
Grab
Effluent
Total Mercury, n /L'
Month) / Weekl 2
Grab
Effluent
Chlorides, m>/L
Month) /Weeklv2
Grab
Effluent
Nitrate/Nitrite as N
Monthly
Grab
Effluent
Sulfates
Month)
Grab
Effluent
Total Dissolved Solids,
m /L
Monthly
Grab
Effluent
Hardness -Total as
[CaCOz or Ca + M ] m / L
Quarterly
Grab
Effluent
Acute Toxicf
Quarterly
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (29).
2. The facility shall conduct weekly sampling during removal of the ash from the east ash basin
extension.
3. The facility shall use EPA method 1631E.
4. Acute Toxicity (Pimephales promelas, 24-hour) monitoring shall be performed in accordance with
Special Condition A. (14) of this permit.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Within 180 days of the issuance date of the permit the permittee shall submit Items V and VI of NPDES
application Form 2C.
If any one of the pollutants (As, Se, Hg, Ni, and Pb) reaches 85% of the allowable level during the
decanting/dewatering, the facility shall immediately discontinue discharge of the wastewater and report
it to the Regional Office and Complex NPDES Permitting Branch via telephone and e-mail.
Page 4 of 29

Permit NC0003425
A. (2) Effluent Limitations and Monitoring Requirements (Outfall 002 - normal operation - decanting
phase) 115A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expiration or
commencement of the dewatering operations, the Permittee is authorized to discharge from Internal
Outfall 002 ash pond effluent (decanting the free water above the settled ash layer that does not
involve mechanical disturbance of the ash). Such discharges shall be limited and monitored by the
Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Avera
Daily
Maximum
Measurement
Frequeng
Sample
Tvpe
Sample
Location
Flow
Daily
Continuous
Effluent
Oil and Grease
15.0 m L
20.0 m /L
2/Month
Grab
Effluent
Total Suspended Solids?
30.0 mg/ L
100 m L
2/Month
Grab
Effluent
Total Arsenic, µ /L
Weekly
Grab
Effluent
Total Molybdenum, µ /L
Weekly
Grab
Effluent
Total Selenium, µ /L
Weekly
Grab
Effluent
H+
Monthly
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system 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 mixing with other sources of wastewater.
3. The facility shall continuously monitor TSS concentration when the decanting process commences and
the pump is operating. The dewatering pump shall be shutoff automatically when one half of the
Daily Maximum limit (15 minutes average) is exceeded. Pumping will be allowed to continue if
interruption might result in a dam failure or damage. Continuous TSS monitoring is only required
when pumps are employed for decanting.
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
units or rises above 8.9 standard units. Pumping will be allowed to continue if interruption might
result in a dam failure or damage. Continuous pH monitoring is only required when pumps are
employed for decanting.
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 April 30, 2021.
In accordance with N.C.G.S. § 130A-309.210, by December 31, 2019, the facility shall convert to the
disposal of dry bottom ash, as defined in the Coal Ash Management Act ("CAMA").
Fly ash is handled dry at this facility.
The facility is allowed to draw down the wastewater in the ash pond to no less than three feet above the
ash.
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, measured at the pump intake.
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,
Subchapter2K.
Page 5 of 29

Permit NC0003425
The facility shall use a floating pump station with free water skimmed from the basin surface using an
adjustable weir.
The facility shall notify via e-mail DWR Complex NPDES Permitting Unit and DWR Raleigh Regional
Office seven calendar days prior to the commencement of the dewatering.
When the facility commences the ash pond decanting/dewatering, the facility shall treat the wastewater
discharged from the ash pond using physical -chemical treatment, if necessary, to assure state Water
Quality Standards are not contravened in the receiving stream. Duke Energy shall notify DWR NPDES
Permitting and DWR Raleigh Regional Office, in writing, within seven calendar days of installing
additional physical -chemical treatment at this Outfall.
Page 6 of 29

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 upon the commencement of the dewatering operations 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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Fre uenc
Sample
T e
Sample
Location
Flow, MGD
Weeklv
Continuous
Effluent
Interstitial Flow
3.0 MGD
Weekly
Continuous
Effluent
Total Selenium, µ /L
Weekly
Grab
Effluent
Total Arsenic, µ /L
Weekly
Grab
Effluent
Total Mercury, n /L
Weeklv
Grab
Effluent
Total Molvbdenum, µ /L
Weekl
Grab
Effluent
Total Antimonv, µ /L
Weekly
Grab
Effluent
Total Copper, µ /L
Weekly
Grab
Effluent
Oil and Grease
15.0 m /L
20.0 m /L
Weekly
Grab
Effluent
Total Suspended Solids'
30.0 mg/ L
100 mg/L
Weekly
Grab
Effluent
H4
Monthly
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (29).
2. Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing
with any other waste stream.
3. The facility shall continuously monitor TSS concentration when the dewatering process commences
and the pump is operating. The dewatering pump shall be shutoff automatically when one half of the
Daily Maximum limit (15 minutes average) is exceeded. Pumping will be allowed to continue if
interruption might result in a dam failure or damage. The continuous TSS monitoring only required
when the pumps are employed for dewatering.
4. The facility shall continuously monitor pH when the dewatering process commences and the
dewatering pump shall be shutoff automatically when the 15 minutes running average pH falls below
6.1 standard units or rises above 8.9 standard units. Pumping will be allowed to continue if
interruption might result in a dam failure or damage. The continuous pH monitoring only required
when the pumps are employed for dewatering.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
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 April 30, 2021.
In accordance with N.C.G.S. § 130A-309.210, by December 31, 2019, the facility shall convert to the
disposal of dry bottom ash, as defined in the Coal Ash Management Act ("CAMA").
Fly ash is dry handled at this facility.
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.
Page 7 of 29

Permit NC0003425
The facility shall notify via e-mail DWR Complex NPDES Permitting Unit and DWR Raleigh Regional
Office seven calendar days prior to the commencement of the dewatering.
When the facility commences the ash pond decanting/dewatering, the facility shall treat the wastewater
discharged from the ash pond using physical -chemical treatment, if necessary, to assure state Water
Quality Standards are not contravened in the receiving stream. Duke Energy shall notify DWR NPDES
Permitting and DWR Raleigh Regional Office, in writing, within seven calendar days of installing
additional physical -chemical treatment at this Outfall.
Page 8 of 29

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 Discharge Pond to the Hyco Reservoir). Such
discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
T e
Sample
Location
Flow
Daily
Calculation
Effluent
Total Residual Chlorine
28 µ>/L
2/Month
Grab
Effluent
Total Phosphorus
Monthly
Grab
Effluent
Total Nitrogen
Monthly
Grab
Effluent
Temperature
Continuous
Recorder
Effluent,
Afterbay
Discharge
Total Arsenic, jig/ L
Monthl Weeklv5
Grab
Effluent
Total Selenium, µ /L
Monthl /Weekl 5
Grab
Effluent
Chloride, m /L
Monthly/ Weeklv5
Grab
Effluent
Total Mercury, n / L6
Monthl Weekl 5
Grab
Effluent
Total Antimon , µ /L
Monthl Weeklv5
Grab
Effluent
Total Molybdenum, µ /L
Monthly/ Weekl 5
Grab
Effluent
Total Thallium µ L
Monthl Weekl 5
Grab
Effluent
H
6.0to9.0S.U.
Monthly/Weekl 5
Grab
Effluent
Ammonia%
1.0 m L
5.0 m /L
Daily
Grab
Effluent
Acute Toxicit e
Quarterly
Composite
Effluent
Hardness -Total as
[CaCOi or (Ca + Mg)],
m /L
Quarterly
Grab
Effluent, 4C 4D
Turbidit 9, NTU
Monthl Weekl '
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (29).
2. Effluent sampling shall be performed in the heated discharge pond at the point of discharge into Hyco
Reservoir.
3. Total Residual Chlorine compliance (including monitoring) is required only if chlorine or chlorine
derivative is added to the cooling water. The Division shall consider all effluent TRC values reported
below 50 µg/L to be in compliance with 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 µg/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). These thermal limitations may be deleted or revised, as appropriate, based upon
evaluation of the results of the thermal studies. This permit may be reopened to implement a
temperature limit if the permittee is not in compliance with Special Condition A. (17).
5. The facility shall conduct weekly sampling during dewatering of the ash basin.
6. The facility shall use EPA method 1631E.
7. 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.
Page 9 of 29

Permit NCO003425
8. Acute Toxicity (Pimephales 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.
9. The net turbidity shall not exceed 50 NTU using a grab sample and measured by the difference
between the effluent turbidity and the background turbidity. The sample for the background turbidity
shall be taken at a 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
The Permittee is allowed to operate Unit 3 in a once -through cooling mode from October 15 through April
30.
If any one of the pollutants (As, Se, and Hg) reaches 85% of the allowable level during the
decanting/dewatering, the facility shall immediately discontinue discharge of the wastewater and report
it to the Regional Office and Complex NPDES Permitting Branch via telephone and e-mail.
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.
Page 10 of 29

Permit NC0003425
A. (5) Effluent Limitations and Monitoring Requirements (Internal Outfall 005) 115A 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 Blowdown). Such discharges shall
be limited and monitored) by the Permittee as specified below:
LIMITS
MONITORING REQUIREMENTS
EFFLUENT
Monthly
Daily
Measurement
Sample
CHARACTERISTICS
Average
Maximum
Frequency
Sample Type
Location
Flow
Continuous
pump Logs
Effluent
durin discharge
Free Available Chlorine;
200 µ L
500 µ L
2/ month
Multiple Grabs
Effluent
Total Residual Chlorine3
Monthly
Multiple Grabs
Effluent
Total Chromium4
200 µ L
200 µ /L
2/Month
Composite
Effluent
Total Zinc;
1.0 m /L
1.0 m L
2/Month
Composite
Effluent
The 126 Priority Pollutants (40
CFR Part 423, Appendix A)
No Detectable Amount
Annual
Grab
Effluent
Exclusive of Zinc and
Chromium'
Notes:
1. The pennittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. 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.
3. Neither free available chlorine nor total residual chorine may be discharged from any single
generating unit for more than two hours per day, unless the Permittee demonstrates to the Division
that discharge for more than two hours is required for macroinvertebrate control. The 500 µg/L is a
daily maximum limitation and is to be measured during the chlorine release period. The 200 µg/L
limitation is an average during the chlorine release period. Monitoring is required only when chlorine
is added to the cooling water system.
4. Limitations and monitoring requirements for the 126 Priority Pollutants (per 40 CFR Part 423,
Appendix A, exclusive of zinc and chromium) apply only if these substances are added by the
permittee for cooling tower maintenance. Compliance with the limitations for the 126 priority
pollutants in 40 CFR 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. All primary industries are required to submit a priority pollutant analysis in accordance
with 40 CFR Part 122 with their application for permit renewal.
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 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.
Page I I of 29

Permit NCO003425
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:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Avera a
Daily
Maximum
Measurement
Frequency2
Sample Type
Sample Location-v
Flow
Monthly
Estimate
Effluent
Total Suspended Solids
50.0 m L
Monthly
Grab
Effluent
Total Selenium
56.0 µ /L
Monthly
Grab
Effluent
Oil and Grease
20.0 m L
Monthly
Grab
Effluent
H
6.0 to 9.0 S.U.
Monthly
Grab
Effluent
Acute Toxicity'
I
Annually
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (29).
2. The permittee shall collect samples if the pond discharges during a calendar month. If there is no
discharge during the calendar month "No Flow" shall be denoted in the DMR.
3. Effluent sampling shall be conducted at the point of discharge into Hyco Reservoir. Samples taken in
compliance with the monitoring requirements listed above shall be taken prior to mixing with other
sources of wastewater.
4. Acute Toxicity (Pimephales 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 from the discharge pipe.
Material storage runoff shall include rainfall to navigable waters through any discernable, confined
and/or discrete conveyance from, or through, coal.
Within 180 days of the effective date of the permit, the permittee shall submit Items V and VI of NPDES
application Form 2C.
Page 12 of 29

Permit NCO003425
A. (7) Effluent Limitations and Monitoring Requirements (Internal Outfall 008) [15A NCAC 02B .0400
et seq., 02B .0500 et seq.]
During the period beginning upon the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Internal Outfall 008 (Domestic Wastewater Treatment System)
into the low volume waste treatment system. Such discharges shall be limited and monitored' by the
Permittee as specified below:
EFFLUENT
CHARACTERISTICS
DAILY MAXIMUM
MONITORING REQUIREMENTS
Monthly
AverageMaximum
Daily
Measurement
Frequency
Sample Type
Sample
Location
Flow
0.025 MGD
Quarterly/Annual;
Pump Logs
Effluent
Biochemical Oxygen
Demand 5-day@ 20°C
30.0 mg/L
45.0 mg/L
Quarterly/Annual3
Grab
Effluent
Total Suspended Solids
30.0 m /L
45.0 m L
Quarterly/ Annual-'
Grab
Effluent
Total Ammonia as N
Quarterly/Annual-'
Grab
Effluent
PH
Quarterly/Annual'
Grab
Effluent
Fecal Coliform
200/100 mL
400/100 mL
Quarterly/Annual'
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. 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. After one year of quarterly monitoring the sampling frequency will be modified to Annual.
See Special Condition A. (22).
Page 13 of 29

Permit NC0003425
A. (8) Effluent Limitations and Monitoring Requirements (Internal Outfall 009) 115A 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:
LIMITS
MONITORING REQUIREMENTS
EFFLUENT
Monthly
Daily
Measurement
Sample
Sample
CHARACTERISTICS
Average
Maximum
Frequency
Type
2
Location
Once per Discharge
Pump Logs
Flow
Event
or similar
Outfall 012B
reading
Total Suspended Solids
30.0 mg/L
100 mg/L
Once per Discharge
Event
Grab
Outfall 012B
Oil and Grease
15.0 mg/L
20.0 mg/L
Once per Discharge
Event
Grab
Outfall 012B
Total Copper
1.0 mg/L
1.0 mg/L
Once per Discharge
Grab
Outfall 012E
Event
Total Iron
1.0 mg/L
1.0 mg/L
Once per Discharge
Grab
Outfall 012B
Event
PH
Once per Discharge
Grab
Outfall 012B
Event
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DW Ws eDMR
application system. See Special Condition A. (29).
2. Samples taken in compliance with the monitoring requirements listed above shall be taken prior to
mixing with other sources of wastewater.
Page 14 of 29

PermitNCO003425
A. (9) Effluent Limitations and Monitoring Requirements (Internal Outfall 010) [15A NCAC 026.0400
et seq., 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until the existing FGD
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:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Lc cation=
Flow
Monthly
Pump Logs or
similar reading
Effluent
Total Suspended Solids
30.0 m /L
100.0 m /L
Quarterly
Grab
Effluent
Oil and grease
15.0 mg/ L
20.0 m /L
Quarterly
Grab
Effluent
TotalArsenic3
8.0 /L
18.0 L
Quarterly
Grab
Effluent
Total Mercury3
34.0 n / L
103.0 n / L
Quarterly
Grab
Effluent
Total Selenium3
29.0 L
7 L
Quarterl
Grab
Effluent
Nitrate/Nitrite as N3
3.0 m /L
4.0 m /L
Quarterl
Grab
Effluent
H
Quarterly
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. Special Condition A. (29).
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. In accord with the Steam Electric Effluent Limitations Guidelines for FGD wastewater (40 C.F.R.
423), these limits shall become effective on December 31, 2021. This permit maybe reopened and
modified if changes are made to 40 C.F.R. 423.
There shall be no discharge of untreated FGD blowdown.
The permittee will operate the FGD wastewater system until all coal-fired generation units at the site are
retired. Performance of the FGD wastewater treatment system shall be optimized to maximize pollutant
reduction and minimize variability.
Page 15 of 29 AM

Permit NC0003425
A. (10) Effluent Limitations and Monitoring Requirements (Internal Outfall 011) 115A 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
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Location
Flow
Monthly
Pump Logs or
similar reading
Effluent
Total Sus ended Solids
30.0 m /L
100.0 m /L
Quarterly
Grab
Effluent
Oil and grease
15.0 mgZL
20.0 m L
Quarterly
Grab
Effluent
Total Arsenic'
8.0 /L
18.0 /L
Quarterly
Garb
Effluent
Total Mercury
34.0 n / L
103.0 n / L
Quarterly
Grab
Effluent
Total Selenium a
29.0 L
7 L
QuarterlyGrab
Effluent
Nitrate/Nitrite as N'
3.0 m /L
4.0 m /L
Quarterly
Grab
Effluent
H
Quarterly
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (29).
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. In accord with the Steam Electric Effluent Limitations Guidelines for FGD wastewater (40 C.F.R.
423), these limits shall become effective on December 31, 2021. This permit maybe reopened and
modified if changes are made to 40 C.F.R. 423.
There shall be no discharge of untreated FGD blowdown.
The permittee will operate the FGD wastewater system until all coal-fired generation units at the site are
retired. Performance of the FGD wastewater treatment system shall be optimized to maximize pollutant
reduction and minimize variability.
Page 16 of 29

Permit NC0003425
A. (11) Effluent Limitations and Monitoring Requirements (Internal Outfall 012A) [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 012A. Such discharges shall be limited and monitored
by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Locationz
Flow
Monthly
Pump Logs or
similar reading
Effluent
Total Suspended Solids
30.0 m L
100.0 m /L
Monthly
Grab
Effluent
Oil and grease
15.0 m /L
20.0 m L
Monthly
Grab
Effluent
Total Arsenic, µ /L
Weekly'
Grab
Effluent
Total Molybdenum, µ /L
Weekly'
Grab
Effluent
Total Selenium, µ /L
Weekl 3
Grab
Effluent
Total Mercury, n /L
Weekl 3
Grab
Effluent
Total Antimony, µ /L
Weekl "
Grab
Effluent
Total Copper, µ /L
k
Weel '
Grab
Effluent
H
Weekly"
Grab
Effluent
Notes
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (29).
2. Samples taken in compliance with the monitoring requirements listed above shall be taken after
the treatment system and prior to mixing with other sources of wastewater.
3. Monitoring is only required when discharging east ash basin closure flows or treated groundwater
through this outfall.
Within 180 days of the commencement of operations of the treatment system the permittee shall submit
Items V and VI of NPDES application Form 2C.
Page 17 of 29

Permit NC0003425
A. (12) Effluent Limitations and Monitoring Requirements (Internal Outfal1012B) [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 Pennittee
is authorized to discharge from Internal Outfall 012B. Such discharges shall be limited and monitored'
by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Fre uenc
Sam ple Type
Sample
Location
Floxr
Monthly
Pump Logs or
similar readingEffluent
Total Suspended Solids
30.0 mg/ L
100.0 m /L
Monthly
Grab
Effluent
Oil and grease
15.0 m /L
20.0 m /L
Monthly
Grab
Effluent
H
Quarterly
Grab
Effluent
Ammonia'
Dail 3
Grab
Effluent
Total Arsenic
Monthly
Grab
Effluent
Total Selenium
Monthly
Grab
Effluent
Total Mercurv4
Monthly
Grab
Effluent
Notes
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (29),
2. Samples taken in compliance with the monitoring requirements listed above shall be taken after
the treatment system and prior to mixing with other sources of wastewater.
3. 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 012B.
4. The facility shall use EPA method 1631E.
Within 180 days of the commencement of operations of the treatment system the permittee shall submit
Items V and VI of NPDES application Form 2C.
Except for those discharges authorized below, or when the bottom ash transport water is used in
the FGD scrubber, there shall be no discharge of pollutants in bottom ash transport water. Bottom
ash transport water shall be discharged to the FGD scrubber during normal operations.
If the FGD Scrubber is unavailable to receive bottom ash transport water, the discharge of
pollutants in bottom ash transport water (bottom ash purge water) from a properly installed,
operated, and maintained bottom ash system to the Lined Retention Basin is authorized under the
following conditions:
A. To maintain system water balance when precipitation -related inflows are generated from a 10-
year storm event of 24-hour or longer duration (e.g., 30-day storm event) and cannot be
managed by installed spares, redundancies, maintenance tanks, and other secondary bottom
ash system equipment; or
B. To maintain system water balance when regular inflows from waste streams other than
bottom ash transport water exceed the ability of the bottom ash system to accept recycled
water and segregating these other waste streams is feasible; or
C. To maintain system water chemistry where current operations at the facility are unable to
currently manage pH, corrosive substances, substances or conditions causing scaling, or fine
particulates to below levels which impact system operation or maintenance; or
Page 18 of 29

Permit NC0003425
D. To conduct maintenance not otherwise described above and not exempted from the definition
of transport water in 40 C.F.R. § 423.11(p), and when water volumes cannot be managed by
installed spares, redundancies, maintenance tanks, and other secondary bottom ash system
equipment.
In no event shall the total volume of the discharge to the Lined Retention Basin exceed a 30-day
rolling average of ten percent of the primary active wetted bottom ash system volume. The
volume of daily discharges used to calculate the 30-day rolling average shall be calculated using
measurements from flow monitors or pump logs. Based on a calculated bottom ash transport
system volume of 0.995 million gallons, the 30 day rolling average discharge shall not exceed 0.099
MGD.
Page 19 of 29

Permit NCO003425
A. (13) Effluent Limitations and Monitoring Requirements (Outfall 012C) [ 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 012C. Such discharges shall be limited and monitored' by the
Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Location]
Flow
Per discharge event
Estimate
Effluent
Total Suspended Solids
30.0 m /L
100.0 m /L
Per discharge event
Grab
Effluent
Oil and grease
15.0 m /L
20.0 m L
Per discharge event
Grab
Effluent
H
6.0 to 9.0 S.U.
Per discharge event
Grab
Effluent
Ammonia3
1.0 m L
5.0 m /L
Per discharge event
Grab
Effluent
Total Arsenic, pg/L
Per discharge event
Grab
Effluent
Total Mercury, ng/L
Per discharge event
Grab
Effluent
Total Selenium, µg/ L
Per discharge event
Grab
Effluent
Nitrate/Nitrite as N,
m /L
Per discharge event
Grab
Effluent
Total Copper, µg/ L
Per discharge event
Grab
Effluent
Total Iron, pg/L
Per discharge event
Grab
Effluent
Notes
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (29).
2. Samples taken in compliance with the monitoring requirements listed above shall be taken after
the treatment system and prior to mixing with other sources of wastewater.
3. 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 at the same time as the
emergency overflow.
Within 180 days of the first discharge event the permittee shall submit Items V and VI of NPDES
application Form 2C.
YUI flows shall be reported on monthly DiXIRS. If no flow occurs during a given month, the words "no flow"
should be clearly written on the front of the DbIR. All samples shall be of a representative discharge.
Page 20 of 29

Permit NC0003425
A. (14) Acute Toxicity Testing PASS/FAIL Permit Limit Outfalls 001 and 003115A NCAC 02B .0200 et
seq.]
The Permittee shall conduct acute toxicity tests on a quarterl 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 (Phnephales 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 March, June, September and
December. 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 parameter code for Pimephales pronielas 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
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Or, results can be sent to the email: ATForms.ATBClncdenr.gov.
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine
of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of
the waste stream.
Should 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.
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.
Page 21 of 29

Permit NC0003425
A. (15) Acute Toxicity Monitoring (ANNUAL) Outfall 006 [15A NCAC 02B .0200 et seq.]
The permittee shall conduct annual acute toxicity tests using protocols defined as definitive in EPA
Document EPA-821-R-02-012 entitled "Methods for Measuring the Acute Toxicity of Effluents and
Receiving Waters to Freshwater and Marine Organisms." The monitoring shall be performed as a Fathead
Minnow (Phnephales pronielas) 24 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 proruelas 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 Form AT-1 (original) is to be sent to
the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Or, results can be sent to the email: [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine
of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of
the waste stream.
Should there be no discharge of flow from the facility during any month, the permittee will complete the
information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit
number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the
comment area of the form. The report shall be submitted to the Water Sciences Section at the address cited
above.
Should any test data from either these monitoring requirements or tests performed by the North Carolina
Division of Water 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 ]NCGS 143-215.1(b)]
Continued intake screen backwash discharge is permitted without limitations or monitoring requirements
A. (17) Temperature Requirements (Outfall 003 Mixing Zone) [NCGS 143-215.1(b)]
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
Page 22 of 29

Permit NC0003425
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. Temperature readings from the
afterbay shall be obtained from the existing USGS station (02077303).
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.
c. Temperature shall be measured daily. In case where the permittee experiences equipment
problems and is unable to obtain daily temperatures from the monitoring station temperature
monitoring must be reestablished within five working days.
d. Temperature increases shall be determined as the increase in temperature above the background
level. Background level shall be defined as the temperature measured at the confluence of the two
southern finger arms on the north side of the lake (Lat. 36.5111, Long 79.06629). The downstream
compliance point shall be defined as the afterbay discharge.
e. A summary of the temperature monitoring results at all sampling locations as established in the
biological monitoring program for Hyco Reservoir and condition A.(4) shall be submitted to the
Division with the annual Biological Monitoring Report due by July 31 of the following year.
A. (18) Instream Monitoring [NCGS 143-215.1(b)]
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 facility shall conduct monthly in -stream
monitoring at Station F2 (formerly 6B) for total arsenic, total selenium, total mercury, total chromium,
dissolved lead, dissolved cadmium, dissolved copper, dissolved zinc, total bromide, total hardness (as
CaCO.), turbidity, and total dissolved solids (TDS). The monitoring results shall be reported on the facility's
Discharge Monitoring Reports and included with the NPDES pernut renewal application.
A. (19) Fish Tissue Monitoring Near Ash Pond Discharge [NCGS 143-215.3 (a) (2)]
The facility shall conduct fish tissue monitoring annually and submit the results with the NPDES permit
renewal application. The objective of this monitoring is to evaluate potential uptake of pollutants by fish
tissue near the ash pond discharge. The parameters analyzed in fish tissue shall include arsenic, selenium,
and mercury. The monitoring shall be conducted in accordance with the sampling plan approved by the
Division. The plan should be submitted to the Division within 180 days from the effective date of the permit.
Upon approval, the plan becomes an enforceable part of the permit.
Copies of all the study plans, study results, and any other applicable materials should be submitted to
Electronic Version Only (PDF and CD)
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
Electronic Version (PDF and CD) and Hard Copy
Division of Water Resources
Water Science Section
1621 Mail Service Center
Raleigh, NC 27699-1621
A. (20) 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.
Page 23 of 29

PermitNC0003425
A. (21) Limitations Reopener [NCGS 143-215.1(b)]
The permit shall be modified, or revoked and reissued, to comply with any applicable effluent guideline
or water quality standard issued 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 is 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 [NCGS 143-215.1(b)]
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 [NCGS 143-215.1(b)]
An operation and maintenance plan, including a monitoring regimen for the bioreactor units and an
emergency response plan in the event of an upset, shall be maintained and available for inspection by
Division personnel.
A. (24) Ash Pond Closure [NCGS 143-215.1(b)]
The facility shall prepare an Ash Ponds Closure Plan. This Plan shall be submitted to the Division one month
prior to the closure of ash ponds.
A. (25) Clean Water Act Section 316(b) [40 CFR 125.95)
The pernuttee shall comply with the Cooling Water Intake Structure Rule per 40 CFR 125.95. The
pernrittee shall submit the following information as required in 122.21 (except 122.21 (r)(6)) by May 31,
2023.
§122.21(r)(2) Source Water Physical Data
§/22.21(r)(3) Cooling Water Intake Structure Data
§122.21(r)(4) Source Water Baseline Biological Characterization Data
§/22.21(r)(5) Cooling Water System Data
§122.21(r)(6) Chosen Method(s) of Compliance with the Impingement Mortality Standard (the chosen
method will be defined after the site -specific BTA determination is made by the Director)
§122.21(r)(7) Entrainment Performance Studies
§122.21(r)(8) Operational Status
§122.21(r)(9) Entrainment Characterization Study
§122.21(r)(10) Comprehensive Technical Feasibility and Cost Evaluation Study
§122.21(r)(11) Benefits Valuation Study
§122.21(r)(12) Non -water Quality and Other Environmental Impacts Study
Based on the director's selection of entrainment, this permit may be reopened to establish a schedule to
implement the selected technology.
Copies of all the study plans, study results, and any other applicable materials should be submitted to:
Page 24 ot'29

Permit NC0003425
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
Based on 40 CFR 125.92 (c) and 40 CFR 125.94 (c) & (d), the Director has determined that operating and
maintaining the existing closed -cycle recirculating system meets the requirements for a provisional BTA.
The final determination will be made upon review of the materials submitted by the permittee. This
determination does not preclude the Division from implementing additional requirements to minimize
impingement and entrainment of the aquatic organisms based on the results of the studies.
The facitity shall continue to demonstrate that make-up water withdrawals attributed specifically to the
cooling portion of the cooling system have been minimized.
Nothing in this permit authorizes take for the purposes of a facility's compliance with the Endangered
Species Act.
A. (26) Structural Integrity Inspections of Ash Pond Dam [15A NCAC 02K.0208]
The facility shall meet the dam design and dam safety requirements per 15A NCAC 2K.
A. (27) Biocide Condition [NCGS 143-215.1(b)]
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 snap 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. (28) Compliance Boundary [15A NCAC 02L.01071
The compliance boundary for the disposal system shall be specified in accordance with 15A NCAC 02L
.0107(a) or (b) dependent upon the date permitted. An exceedance of groundwater standards at or beyond
the compliance boundary is subject to remediation action according to 15A NCAC 02L .0106(c), (d), or (e)
as well as enforcement actions in accordance with North Carolina General Statute 143-215.6A through 143-
215.6C.
The compliance boundary maps for this facility are incorporated herein and attached hereto as
Attachments A and B. Attachment A includes the temporary compliance boundary around the East Ash
Basin Extension. Attachment B is the future compliance boundary effective upon completion of the
removal of coal ash from the East Ash Basin Extension.
Page 25 of 29

Permit NC0003425
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. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,
2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this
permit (Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)l
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. Until such time that the state's
eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed original and a copy of the computer printed eDMR to the
following address:
NC DENR / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-161.7
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility
being physically located in an area where less than 10 percent of the households have broadband
access, then a temporary waiver from the NPDES electronic reporting requirements may be granted
and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2,3) or alternative
forms approved by the Director. Duplicate signed copies shall be submitted to the mailing address
above. See "How to Request a Waiver from Electronic Reporting' section below.
Regardless of the submission method, the first DMR is due on the last day of the month following the
issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
Starting on December 21, 2025, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• 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).
Page 26 of 29

Permit NC0003425
2. Electronic Submissions
In accordance with 40 CFR 122.41(l)(9), the permittee must identify the initial recipient at the time of
each electronic submission. The permittee should use the EPA's website resources to identify the
initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity
for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each
type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at: http://www2.epa.gov/compliance/final-national-pollutant-
d ischarge-elim ination-s v ste m-nvdes-electronic-reporting-rule.
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the
Division. Requests for temporary electronic reporting waivers must be submitted in writing to the
Division for written approval at least sixty (60) days prior to the date the facility would be required
under this permit to begin submitting monitoring data and reports. The duration of a temporary
waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports
shall be submitted electronically to the Division unless the permittee re -applies for and is granted a
new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers
are not transferrable. Only permittees with an approved reporting waiver request may submit
monitoring data and reports on paper to the Division for the period that the approved reporting
waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
http: / / deq.nc.gov/about/ divisions/ water -resources/ edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) Ml
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part 11,
Section B. (11.)(a) or by a duly authorized representative of that person as described in Part 11, 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:
httl2://deg.nc.gov/about/`divisions/`water-rc,,,OLirces/edmr
Page 27 of 29

Permit NC0003425
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL
BE ACCEPTED:
"I certify, under penalty of law, that this document and till attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate
the infmuation submitted. Based on my inquiry of the person or persons who manage the system, or those
persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting
false information, including the possibility of fines and imprisonment for knowing violations."
5. Records Retention [Supplements Section D. (6.)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 122.411.
A. (30) Additional Conditions And Definitions [NCGS 143-215.3 (a) (2) and NCGS 143-215.661
1. EPA methods 200.7 or 200.8 (or the most current versions) shall be used for analyses of all metals
except for total mercury (EPA Method 1631E).
2. All effluent samples for all external outfalls shall be taken at the most accessible location after the
final treatment but prior to discharge to waters of the U.S. (40 CFR 122.410)).
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 wastewater resulting from cleaning any metal
process equipment with chemical compounds, including, but not limited to, boiler tube cleaning
(40 CFR 423.11 (c)).
5. The term metal cleaning waste means any wastewater resulting from cleaning [with or without
chemical cleaning compounds] any metal process equipment including, but not limited to, boiler
tube cleaning, boiler fireside cleaning, and air preheater cleaning (40 CFR 423.11 (d)).
6. For all outfalls where the flow measurement is to be "estimated" the estimate can be done by.
using calibrated V-notch weir, stop -watch and graduated cylinder, or other method approved by
the Division.
7. The term "FGD wet scrubber wastewater" means wastewater resulting from the use of the flue -gas
desulfurization wet scrubber.
8. There shall be no discharge of polychlorinated biphenyl compounds.
9. The permfttee shall report the presence of cenospheres observed in any samples on the DMRs in
the comment section.
10. The applicant is permitted to discharge chemical metal cleaning wastes to the Lined Retention
Basin.
11. Nothing contained in this permit shall be construed as a waiver by the permittee of any right to a
hearing it may have pursuant to State or Federal laws and regulations.
Page 28 of 29

nnry lll%%r�"'
`_� _ Outfall0lX' �1�1/
F�
Permit NC0003425
I
r
� � t
Outfalll2B
o-�
Internal
Outfall 00'
�,.> ;
��- Internal
Outfal1010 g
-
g
f
wis ��
a:
i I
Duke Energy Progress — Roxboro Steam Station, Person County Facility Location
Receiving Stream: Hyco Reservoir Stream Gass: WS-V, B .*
Sub -Basin: 03-02-05 State Grid: B22NE/Olive Hill N
Drainage Basin: Roanoke River Basin
Outfall 001: Latitude 36° 29' 1.25" Longitude 79' 3' 23.0"
Outfall 003: Latitude 36' 28' 48" Longitude 79' 05' 11"
Outfall 006: Latitude 36' 19' 13" Longitude 79°04041" NPDES Permit NC0003425
Outfall 012C: Latitude: 36' 129 14" Longitude 79' 04' 55"
Paw 29 of 29
Outfalll2B
o-�
Internal
Outfall 00'
�,.> ;
��- Internal
Outfal1010 g
-
g
f
wis ��
a:
i I
Duke Energy Progress — Roxboro Steam Station, Person County Facility Location
Receiving Stream: Hyco Reservoir Stream Gass: WS-V, B .*
Sub -Basin: 03-02-05 State Grid: B22NE/Olive Hill N
Drainage Basin: Roanoke River Basin
Outfall 001: Latitude 36° 29' 1.25" Longitude 79' 3' 23.0"
Outfall 003: Latitude 36' 28' 48" Longitude 79' 05' 11"
Outfall 006: Latitude 36' 19' 13" Longitude 79°04041" NPDES Permit NC0003425
Outfall 012C: Latitude: 36' 129 14" Longitude 79' 04' 55"
Paw 29 of 29

Permit NC0003425
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. Temperature readings from the
afterbay shall be obtained from the existing USGS station (02077303).
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.
c. Temperature shall be measured daily. In case where the permittee experiences equipment
problems and is unable to obtain daily temperatures from the monitoring station temperature
monitoring must be reestablished within five working days.
d. Temperature increases shall be determined as the increase in temperature above the background
level. Background level shall be defined as the temperature measured at the confluence of the two
southern finger arms on the north side of the lake (Lat. 36.5111, Long 79.06629). The downstream
compliance point shall be defined as the afterbay discharge.
e. A summary of the temperature monitoring results at all sampling locations as established in the
biological monitoring program for Hyco Reservoir and condition A.(4) shall be submitted to the
Division with the annual Biological Monitoring Report due by July 31 of the following year.
A. (18) Instream Monitoring [NCGS 143-215.1(b)]
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 facility shall conduct monthly in -stream
monitoring at Station F2 (formerly 6B) for total arsenic, total selenium, total mercury, total chromium,
dissolved lead, dissolved cadmium, dissolved copper, dissolved zinc, total bromide, total hardness (as
CaCOg), 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.
A. (19) Fish Tissue Monitoring Near Ash Pond Discharge [NCGS 143-215.3 (a) (2)]
The facility shall conduct fish tissue monitoring annually and submit the results with the NPDES permit
renewal application. The objective of this monitoring is to evaluate potential uptake of pollutants by fish
tissue near the ash pond discharge. The parameters analyzed in fish tissue shall include arsenic, selenium,
and mercury. The monitoring shall be conducted in accordance with the sampling plan approved by the
Division. The plan should be submitted to the Division within 180 days from the effective date of the permit.
Upon approval, the plan becomes an enforceable part of the permit.
Copies of all the study plans, study results, and any other applicable materials should be submitted to
Electronic Version Only (PDF and CD)
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
Electronic Version (PDF and CD) and Hard Copy
Division of Water Resources
Water Science Section
1621 Mail Service Center
Raleigh, NC 27699-1621
A. (20) 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.
Page 23 of 29

(> DUKE
ENERGY,
April 23, 2020
Via Overnight Mail
NC Dept of Environmental Quality
MAY - 1 2020
Raleigh Regional Office
Rick Bolich
Raleigh Regional Office Regional Supervisor
North Carolina Department of Environmental Quality
Division of Water Resources
1628 Mail Service Center
Raleigh, NC 27609
Bob Sledge
North Carolina Department of Environmental Quality
Division of Water Resources
Water Quality Permitting Program
1617 Mail Service Center
Raleigh, NC 27699-1617
James Wells
Vice President
Environmental, Health and Safety
Programs & EnAm mental Sciences
526 South Church Street
Charlotte, NC 28202
[phone]
Subject: Report Under Special Order by Consent — EMC SOC WQ S 18-005
Duke Energy Progress, LLC — Mayo Steam Electric Plant
NPDES Permit NCO038377
2019 Annual Seep Survey Report
Dear Messrs. Bolich and Sledge:
On behalf of Duke Energy Progress, LLC (DEP), I am submitting to you the Mayo Steam Electric
Plant Annual Seep Report summarizing the findings of the comprehensive survey as required by
Special Order by Consent (SOC), SOC No. S 18-005 Section 2.c.3).
As required by the SOC, I certify under penalty of law that this document and all attachments were
prepared under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted. Based on my inquiry
of the person or persons who manage the system, or those persons directly responsible for
gathering the information, the information submitted is, to the best of my knowledge and belief,
true, accurate, and complete. I am aware that there are significant penalties for submitting false
information, including the possibility of fine and imprisonment for knowing violations.

Messrs. Bolich and Sledge
April 23, 2020
Page 2
Please direct any questions concerning the Mayo Steam Electric Plant SOC No. S 18-005 to Lori
Tollie at (336) 8544916 and to Chris Hallman at [phone] relative to the annual seep
inspection report.
Sincerely,
Vice President, Environment, Health & Safety -
Programs and Environmental Sciences
Duke Energy
Attachment:
Mayo Steam Electric Plant 2019 Annual Seep Survey
CC: Richard Baker, Duke Energy
Lori Tollie, Duke Energy
Chris Hallman, Duke Energy
Leanne Wilson, Duke Energy
Paul Draovitch, Duke Energy
Matt Hanchey, Duke Energy

167,
synTerra
NC Dept of Environmental Quality
MAY -1 2020
Raleigh Regional Office
2019 ANNUAL SEEP REPORT
MAYO STEAM ELECTRIC PLANT
EMC SOC WQ S18-005
10660 BOSTON ROAD
ROXBORO, NC 27574
APRIL 2020
PREPARED FOR
DUKE
ENERGYw
PR(1(`.p r c c�
DUKE ENERGY PROGRESS, LLC
erry y ie, C G #1425
Senior Proi ct Manager

2019 Annual Seep Report April 2020
Mayo Steam Electric Plant, Duke Energy Progress, LLC SynTena
TABLE OF CONTENTS
SECTION
PAGE
1.0 INTRODUCTION.........................................................................................................1-1
1.1 Inspection Details......................................................................................................1-1
2.0 FINDINGS..................................................................................................................... 2-1
2.1 General Observations...............................................................................................2-1
2.2 Effects of Decanting..................................................................................................2-1
2.3 Changes to Seep Status.............................................................................................2-1
3.0 REFERENCES................................................................................................................3-1
LIST OF FIGURES
Figure 1 SOC Locations and Inspection Areas
LIST OF TABLES
Table 1 SOC Locations and Descriptions — 2019 Inspection
LIST OF APPENDICES
Appendix A Photographs
Page

2019 Annual Seep Report April 2020
Mayo Steam Electric Plant, Duke Energy Progress, LLC SynTerra
LIST OF ACRONYMS
C&D Landfill Constructrion and Debris Landfill
EMC Environmental Management Commission
SOC Special Order by Consent
Page ii

2019 Annual Seep Report April 2020
Mayo Steam Electric Plant, Duke Energy Progress, LLC SynTerra
1.0 INTRODUCTION
On February 28, 2019, Jerry Wylie (NC L.G. #1425) of SynTerra inspected the Mayo
Steam Electric Plant (Mayo or Site) property for existing and potential new seeps.
Inspection activities were performed in accordance with North Carolina Environmental
Management Commission (EMC) Special Order by Consent WQ #518-005. That Special
Order by Consent (SOC) describes inspection requirements as follows:
Duke Energy shall conduct annual comprehensive surveys of areas down gradient of ash
basins identifying new seeps, and documenting the physical characteristics of previously
documented seeps. All examinations of seeps must include identification of seeps by
approximate latitude and longitude and date -stamped digital photographs of their
appearance. A report summarizing the findings of the surveys, including a section
analyzing the effect decanting of the basin(s) has on seep flows, accompanied by copies of
the photographs noted above ("Annual Seep Report"), shall be submitted to DWR in
conjunction with submittal of the April 30 quarterly report noted in 2(c)(2) above. This
Annual Seep Report must list any seep that has been dispositioned (as described below)
during the previous year, including an analysis of the manner of disposition.
Each location documented as a seep at issuance of the SOC, as listed in Table 1 of the
SOC, was observed and documented with photographs during the inspection.
General observations include:
• No previously unidentified seeps were observed during the inspection.
• No noteable changes to seep status were observed during the inspection.
• Decanting had not begun at the time of this inspection.
1.1 Inspection Details
Weather before and during the inspection was clear. Temperatures ranged from
approximately 40 to 50 degrees Fahrenheit (F). There was no precipitation on the day of
the inspection, according to information from the on -Site rain gauge. Information from
the rain gauge indicated there was no precipitation during the three days before the
inspection.
The inspector reviewed previous inspection reports and dam safety inspection reports
pertaining to the ash basin. Cedric Fairbanks (Duke Energy system owner) conducted
the ash basin dam safety inspections and prepared the reports. Ms. Leanne Wilson
(Mayo Plant Environmental Coordinator) and Mr. Fairbanks were interviewed
Page 1-1

2019 Annual Seep Report April 2020
Mayo Steam Electric Plant, Duke Energy Progress, LLC SynTerra
concerning recent rainfall, construction/stabilization projects associated with the ash
basins, and general Site conditions in and surrounding the ash basin. Observations from
the dam safety inspection reports were consistent with observations made during the
annual inspection.
The inspection included observations in the following areas (Figure 1):
• Along the perimeter of the ash basin (at the toe of the dam)
• Along the area north of the 1981 Construction and Debris (C&D) Landfill
• Within areas at or below the ash basin water elevation and downgradient and/or
downstream
Drainage features associated with the basin, including engineered channels
Seep locations and inspection areas are shown on Figure 1. Observations noted during
the inspection are summarized on Table 1. Photographs taken of each seep location
during the inspection are included in Appendix A.
Page 1-2

2019 Annual Seep Report April 2020
Mayo Steam Electric Plant, Duke Energy Progress, LLC SynTerra
2.0 FINDINGS
2.1 General Observations
Inspection observations of each seep are shown in Table 1. Details include:
• No new seeps were observed during the inspection.
• No previously unidentified or unreported pipes were observed during
inspection.
• Ash basin dam toe drains (S-01 and S-02) are enclosed within a confined space.
• A system designed to capture flow from S-01 and S-02 and from nearby seep
locations — including S-01A, S-02A, and S-02B — is in operation.
2.2 Effects of Decanting
Decanting of the ash basin at Mayo had not yet begun at the time of this inspection.
2.3 Changes to Seep Status
Mr. Wylie inspected each seep to evaluate whether it may be dispositioned in
accordance with the SOC. The requirements for dispositioning a seep are as follows:
For purposes of this Special Order, "dispositioned" includes the following: (1) the seep is
dry for at least three consecutive quarters, (2) the seep does not constitute, and does not
flow to, waters of the State or Waters of the United States for three consecutive quarters;
(3) the seep is no longer impacted by flow from any coal ash basin as determined by the
Director of DWR in accord with applicable law and best professional judgment; or (4) the
seep has been otherwise eliminated (e.g., through an engineering solution). If a seep that
has been dispositioned through drying up reappears in any subsequent survey, such a
seep will no longer be deemed dispositioned and can be subsequently re-dispositioned as
specified above. Non -constructed seeps described in paragraph 1(h) of this SOC cannot be
dispositioned through option (2) above.
No changes to seep status were observed during this inspection.
Page 2-1

2019 Annual Seep Report April 2020
Mayo Steam Electric Plant, Duke Energy Progress, LLC SynTerra
3.0 REFERENCES
North Carolina Department of Environmental Quality. (2018). Special Order by Consent
EMC SOC WQ 518-005.
Page 3-1

2019 Annual Seep Report April 2020
Mayo Steam Electric Plant, Duke Energy Progress, LLC SynTerra
FIGURE

SOC LOCATIONS AND DES
2019 ANNL
MAYO STEAr
DUKE ENERGY PRO(
Location Coordinates
Receiving
Facility
Sample ID
Receiving Waterbody
Waterbody
DI
Latitude
Longitude
Classification
Intermittently o
downslope fron
location. No flov
Mayo
S-07*
36.521798
-78.892152
Mayo Reservoir
WS-V
evaluations.
southeast, me
before reachim
sampling
Seep forms ono
Mayo
5-08
36.537502
-78.890398
Crutchfield Branch
B
east toe drain,fl
channelto
Natural stream
Maya
S-09*
36.522902
-78.886868
Mayo Reservoir
WS-V
originating south
upstream of, al
From sampli
Mayo
S-10
36.538422
-78.890395
Crutchfield Branch
B
Minor seep to
northwest inl
Not"*
' - Location previously investigated as a seep_ Monitoring has not indicated the presence of coal combustion residuals.
" - Seep dispositioned via repair and/or non -Rowing condition to potentially reach Waters of the U. S., or other, as noted. Monitoring shall be conducted at the app
All monitoring shall be conducted per the requirements found in Attachment B of this Order.
28 - 15A NCAC 02L .0202 Standard
CCR - Coal Combustion Residuals
ft - feet
NA - Not Applicable
NPDES - National Pollutant Discharge Elimination System
SOC - Special Order by Consent
UT - Unnamed Tributary

1BLE 1
;RIPTIONS - 2019 INSPECTION
AL SEEP REPORT
ELECTRIC PLANT
RESS, LLC, ROXBORO, NC
scription
SOC Monitoring
Interim Action Levels
Notes from Inspection
served area of wetness
former production well
observed during recent
NA - Seep
my flow would drain
Dispositioned
NA - Seep Dispositioned
Historical sample location. Dispositioned.
®ing with flow at 5-06
Mayo Reservoir. From
no CCR impacts.
Area of emergence is a small pool (-3 ft x 6
Monitoring in
ft) with little discernible flow that increases
ridge over (east) from
Crutchfield Branch
downslope. A small, wet, muddy area is
wing northwest in small
'rutchfield
downstream of all seep
NA - 2B Standards Apply
present near sign (east) flowing across leaf
Branch.
flow contributions
litter with iron floc present. About 50 feet
uphill is an area of emergence in a scour
channel that Flows towards and into channel.
dow to Mayo Reservoir
ast of plant. Location is
fl
d flowing toward S-06.
NA - Seep
Dispositioned
NA - Seep Dispositioned
Historical sample location. Dispositioned.
- no CCR impacts.
Seep is located to the southeast of 5-03 on a
Monitoring in
hillside between two topographic draws.
mall channel, flowing
Crutchfield Branch
NA - 2B Standards Apply
Shallow flow was present in the channel
Crutchfield Branch.
downstream of all seep
directly below sign. Flow increased downslope
flow contributions
and crossed the monitoring well access road
and continued into Crutchfield Branch.
ximate locations indicated on the attached site map.
Prepared by: P)WJ Checked by: PWA
Page 2 of 2

SOC LOCATIONS AND DES
2019 ANNI
MAYO STEAf
DUKE ENERGY PRO(
Location Coordinates
Receiving
Facility
Sample ID
Receiving Waterbody
Waterbody
D.
Latitude
Longitude
Classification
NA - Flow is collected and
pumped back to NPDES-
Mayo
5-01
36.538849
-78.893512
permitted wastewater system
N4
Seep flow f
in accordance with the
pumping system's design
capacity.
Minor seep forma
Mayo
S-01A
36.538903
-78.89351
UT to Crutchfield Branch
B
toe of the west
UT to Cr
NA - Flow is collected and
pumped back to NPDES-
Mayo
5-02
36.537964
-78.891364
permitted wastewater system
NA
Seep flow 1
in accordance with the
pumping system's design
capacity.
Minor seep forr
Mayo
S-02A
36.538005
-78.891611
Crutchfield Branch
B
feet upslope of e
collection box,
Minor seep form
Mayo
S-02B
36.537989
-78.891339
Crutchfield Branch
B
02 collection bo>
Mayo
5-03**
36.538654
-78.890714
Crutchfield Branch
B
Sampling
Mayo
5-04**
36.538896
-78.89341
Crutchfield Branch
B
Sampling
Mayo
5-05**
36.535039
-78.891693
Mayo Reservoir
WS-V
Ash basin samp
Seep flow to sma
Mayo
5-06*
36.521971
-78.88526
Mayo Reservoir
WS-V
southeast of poi
f

-kBLE 1
:RIPTIONS - 2019 INSPECTION
AL SEEP REPORT
ELECTRIC PLANT
RESS, LLC, ROXBORO, NC
scription
SOC Monitoring
Interim Action Levels
Notes from Inspection
Constructed seep. Water level in box is low
and sump is active. Evidence of sediment
im west toe drain.
NA
NA
transport from upslope gravel and riprap is
present around the area surrounding the box
structure.
g within filter bed at the
Monitoring in
An area of rip rap and gravel at the toe of the
am and flowing into an
Crutchfield Branch
NA - 2B Standards Apply
west side groin ditch of the dam. Minimal flow
tchfield Branch.
downstream of all seep
beneath/around rip rap. Seep captured by
flow contributions
collection system.
om east toe drain.
NA
NA
Constructed seep. Water level in box is low
and sump is active.
ing within filter bed 20
Monitoring in
st dam toe drain (5-02)
owing into Crutchfield
Crutchfield Branch
downstream of all seep
NA - 2B Standards Apply
Dry. Seep captured by collection system.
&ranch.
flow contributions
Monitoring in
Seep is adjacent to east toe drain structure in
ig just downgrade of S-
Crutchfield Branch
area of rip rap at the toe of the east side groin
Flowing into Crutchfield
downstream of all seep
NA - 2B Standards Apply
of the ash basin dam. Flow downslope and
Iranch.
flow contributions
along/within groin on east side of the toe drain
structure.
=ation; not a seep
NA - Seep
Dispositioned
NA - Seep Dispositioned
Dispositioned. Not a seep.
ration; not a seep
NA - Seep
Dispositioned
NA - Seep Dispositioned
Dispositioned. Not a seep.
ng location, not a seep
NA - Seep Dispositioned
NA - Seep Dispositioned
Dispositioned. Not a seep.
channel that originates
NA - Seep
ar plant. Flows to Mayo
Dispositioned
NA - Seep Dispositioned
Historical sample location. Dispositioned.
servoir.
Page 1 of 2

v
x
NOTES,
I SPECIAL ORDER BY CONSENT (SOC) LOCATIONS ARE DESCRIBED IN EMC SOC WO
.I&W5
A
2. THE WATERS OF THE U.S. DELINEATION HAS NOT BEEN APPROVED BY THE U.S.
ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A
PRELIMINARY JURISDICTIONAL DETERMINATION ONLY THE PRELIMINARY WETLANDS
AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER
ENVIRONMENTAL 6INFRASTRUCTURE, INC. NATURAL RESOURCES TECHNICAL
REPORT (NRTR) FOR MAYO STEAM ELECTRIC PLANT DATED JANUARY 2014 AND
UPDATED ON JULY 11, 201B TO REMOVE ONE PREVIOUSLY MISIDENTIFIED WETLAND
NEAR THE ASH BASIN DISCHARGE CHANNEL
0. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A MIX OF
SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE. SAMPLE LOCATIONS ARE
APPROXIMATE.
A ALL BOUNDARIES ARE APPROXIMATE
5. MAYO PLANT PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS.
6 AERIAL PHOTOGRAPHY OBTAINED FROM ESRI ONLINE ON JUNE 10, 2019 AERIAL
WAS COLLECTED ON FEBRUARY 6. 2017
T. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 02M (NAD83).
� +jElA�lli+r'yy1�
r:

u l • __v rNORTH CAROLINA NRGWN STATE UNE
WLLIfA%COVNTY (APPROXIMATE)
--7!!Illllllllll
r
j
\
MAYO RESERVOIR
V. WE. 433.0t
LEGEND
• CONSTRUCTED SEEP (APPROXIMATE)
0 NON -CONSTRUCTED SEEP (APPROXIMATE)
• DISPOSITIONED SEEP (APPROXIMATE)
SPECIAL ORDER BY CONSENT (SOC) INSPECTION
AREA
— ASH BASIN WASTE BOUNDARY
• - • GEOGRAPHIC LIMITATION
- - - - RIGHT-OF-WAY (DUKE ENERGY PROPERTY)
— • DUKE ENERGY PROGRESS PROPERTY
'
- -► STREAM (AMEC NRTR 2014)
7= WETLAND (AMEC NRTR 2014)
DUKE
GRAPHIC SCALE
500 0 500 1.000
FIGURE 1
ENERGY
IN '
SOC LOCATIONS AND INSPECTION AREAS
PROGRESS
DRAWN BY: &ROBINSON DATE05/03/20w
2019 ANNUAL SEEP REPORT
REVISEDBY: nROBINSON DATE: 03/19,2020
MAYO STEAM ELECTRIC PLANT
`
CHECKEDBV..J. MLIE DARE: 03/192D2[
APPROVED BY J.W IT DATE 03I392D2n
ROXBORO, NORTH CAROLINA
PROJEE, MANADEP J LIE
synTem
ww,.svnterrawrD.Com

2019 Annual Seep Report April 2020
Mayo Steam Electric Plant, Duke Energy Progress, LLC SynTerra
TABLE

2019 Annual Seep Report April 2020
Mayo Steam Electric Plant, Duke Energy Progress, LLC SynTerra
APPENDIX A
PHOTOGRAPHS

2019 Annual SOC Report
Mayo Steam Electric Plant - Duke Energy Progress, LLC
O 179"S M * 36°32'19"N, 78053'36"W z16.4ft 1 418ft
s
View of constructed seep location, facing down (top of photo is to the
S-01 I
028•NE m 0 36°32'21"N, 78.53'37WJ z32.8ft A 394ft
S-01A I View of seep location facing northeast.
RT1 KI)V.Dl
SynTerra
Page 1 of 7

2019 Annual SOC Report
Mayo Steam Electric Plant - Duke Energy Progress, LLC
O 220-SW M ! 36°32'15-N, 78°53'28"W x32.8ft ♦ 390k
S-02 I View of constructed seep location facing southwest.
0231•SW(T) 036°32'16"N, 78-5N z16.4f11387f1
7i Ni
L i"T,_ ins
S-02A I View of seep location facing southwest.
mril 2020
�enTerra
Page 2 of 7

2019 Annual SOC Report
Mayo Steam Electric Plant - Duke Energy Progress, LLC
l` }
g-0 ; I View of dispositioned seep location facing northeast.
Lpril 2020
SynTerra
Page 3 of 7

2019 Annual SOC Report
Mayo Steam Electric Plant - Duke Energy Progress, LLC
0101°E (T) OO 36°32'20"N, 78°53'36"W t16.4ft ♦ 426ft
Lpril 2020
wnTerra
5-04 I View of dispositioned seep location facing east. !
No photo provided. Location was dispositioned prior to issuance of SOC because it
is not a seep. Location was an ash basin location.
S-05
Page 4 of 7

2019 Annual SOC Report
Mayo Steam Electric Plant - Duke Energy Progress, LLC
Loril 2020
';%,nTerra
No photo provided. Location was dispositioned prior to issuance of SOC based can
no CCR impacts. Location is a historical sampling location.
No photo provided. Location was dispositioned prior to issuance of SOC based on
no CCR impacts. Location is a historical sampling location.
5-0 i
Page 5 of 7

2019 Annual SOC Report
Mayo Steam Electric Plant - Duke Energy Progress, LLC
No photo provided. Location was dispositioned prior to issuance of SOC based on
no CCR impacts. Location is a historical sampling location.
S-09-1-
Loril 2020
S � nTerra
Page 6 of 7

w
2019 Annual SOC Report
Mayo Steam Electric Plant - Duke Energy Progress, LLC
NW N NE
0 355•N M 3 38°32'18"N, 78°53'25"W s16.4f1 ♦ 408f1
- l Q View of seep location facing north.
,pril 2020
SynTerra
Page 7 of 7

DocuSign Envelope ID: CF6912A6-A9284BBD-9I-.
­BiF12AADBD
Sun
.'
-.' r
ROY COOPER
#e _
GOYMnM
T�
ELIZABETH S. BISER
RICHARD E. ROGERS. JR.
NORTH Caao.INA
Dim, for
Environmental Quality
July 7, 2022
Ms. Jessica Bednarcik, Senior Vice President
Environmental Health and Safety, CCP
[e-mail]
Duke Energy Carolinas, LLC
526 S Church St.
Mail Code Ec13k
Charlotte, NC 28201-1002
Subject: Compliance Evaluation Inspection
Cape Fear Steam Electric Power Plant
NPDES Permit No. NC0003433
Chatham County
Dear Ms. Bednarcik
On June 8, 2022, Jason Robinson and Alys Hannum of the Division of Water Resources' Raleigh
Regional Office (RRO) conducted a compliance evaluation inspection of the subject facility. The
assistance provided by Jonathan Stamas (Operator in Responsible Charge — ORC), Joyce Dishmon
(Permitting and Compliance), and John Toepher (Environmental Engineer) was appreciated.
The NPDES Compliance inspection consisted of the following:
• Review of the NPDES permit
• Review of the owner/facility information
• Review of monitoring data and Electronic Discharge Monitoring Reports (eDMRs)
• Review of operator logbook
• Walk-thru inspection of the outfalls
Finding during the pre -inspection were as follows:
1. The recent permit became effective October 1, 2020 and expires on June 30, 2023. If the
permit is not rescinded prior to expiration, please submit a permit renewal application at
least 180 days prior to expiration to comply with permit requirements.
2. The facility entered into a Special Order of Consent (SOC) on January 27, 2020. The SOC
involves a Corrective Action Plan to address seeps.

DocuSign Envelope ID: CF6912A6-A9294BBD-91 , , , B1F12AADBD
3. The facility is classified as a PC-1 Wastewater Facility. Mr. Jonathan Stamas is designated as
the Operator in Responsible Charge (ORC) and Robert Howard and Jaquelin Wilson are the
designated back-up operators (bORC). All are certified Grade 1 operators.
4. DWR last inspected this facility for NPDES compliance in December 2020.
5. No DMR violations have occurred since the last inspection.
6. Prior to 2012, the facility employed two coal-fired units along with four oil -fueled combustion
turbine units. Residuals generated from coal combustion were stored in on -site ash basins.
The plant ceased operations in 2012, and demolition activities of the plant have been
completed. The site has five ash basins: 1956, 1963, 1970, 1978 and 1985. The 1956, 1963
and 1970 basins are dry and vegetated, except for the southern end of the 1970 basin that is
seasonally wet. All wastewater generated by the site were discharged to the discharge canal
at Outfall 007. A new Outfall 008 was added to the permit to allow for releases to the Cape
Fear River associated with basin closures, and Outfall OO8a and 008b were added for
emergency discharge and emergency overflow. An ash beneficiation facility became
operational in 2021 to convert the residuals to fly ash material for use in the production of
concrete. This facility is located beside the existing site.
The facility reported effluent discharges at Outfall 008 for all months in 2020 except for
January and August. In 2021, the facility only reported effluent discharges at 008 in January,
February, and July. As of this inspection, the facility only reported one 2022 discharge from
Outfall 008 in April. The permittee is compliant with the self -monitoring requirements of the
permit.
Findings during the inspection were as follows:
1. Daily operation logbooks were available for review. The books were detailed and complete
and kept onsite going back at least three years.
2. Upstream and downstream samples are collected by Duke Environmental Services and sent to
Pace Labs for analyzation:
• Instream samples are analyzed at Pace's Asheville laboratory, Certification #40.
• Instream and dewatering Mercury are analyzed at Pace's South Carolina laboratory
(#329).
• Dewatering field samples are analyzed by Pace Field Services (#5342).
Duke Energy Progress -HEEC collects and analyzes instream field samples (#5710).
Outfall 008 samples are collected by Pace Field Services and sent to the Duke McGuire lab:
• Oil & Grease, turbidity, Al, As, Cd, Cu, Pb, Ni and Se are analyzed by Duke (#248).
• TSS and Mercury are analyzed by Pace labs.
Toxicity is collected by Duke and analyzed by ETT Environmental, Inc. (#22)
2of3

DoaSgn Envelope ID: CF6912A6-A92B-4BBD-9h,,-,,B1F12AADBD
3. Laboratory Bench sheets, chain of custody forms and lab results for December 2021 and April
2022 were reviewed and found to be complete. Bench sheet values were compared to the
Electronic Discharge Monitoring Reports (eDMR) submitted by the permittee and no
discrepancies were found. Past laboratory documents are kept on site (required to keep at
least five years). Chronic Toxicity is sample monthly (in months where discharges occur)
4. Outfalls 001, 005, 007, 008, 008a & 008b were visited. Outfall 008 on the Cape Fear River is
the only active discharge (see Item 6 above). The facility has been dewatering from the 1978
and 1985 basins since November 12, 2019. Water from the two ash ponds is pumped and
treated at the on -site treatment facility before being discharge at Outfall 008. Flow meters
are located at the discharge of the 1978 and 1985 basin, and at Outfall 008. The outfalls
appeared to be in good condition, and the right of ways were properly maintained. The
facility was not discharging at the time of the inspection.
The inspector did not observe any issues of concern during this inspection. The facility appeared well
maintained, and documentation was found to be detailed, organized, and complete.
Thank you again for your cooperation with this inspection. If you have any questions regarding the
report or any of the findings, please contact Jason Robinson at [e-mail].
ATTACHMENTS
• EPA Inspection Checklist
Cc: Raleigh Regional Office and Laserfiche
[e-mail]
[e-mail]
Sincerely,
DocuSigned by: A
E4wotatAt SSa f,
0291fiE6AB]2144F..
Vanessa Manuel, Assistant Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ
3of3

DocuSign Envelope ID: D8DOA05A-7AF1
ROY COOPE k
ELIZABEFH S. RISER
5. DANIEL SMITH
Pr :,,
Jessica Bednarcik
Duke Energy Progress, LLC
526 S Church St. — Ec13k
Charlotte, NC 28201-1002
Dear Ms. Bednarcik:
8A06-8A5476502AC5
Emir onmvnlal Qua 1, r,
September 9, 2021
Subject: Compliance Evaluation Inspection
Duke Energy — Roxboro Steam Plant
NPDES Permit No. NC0003425
Person County
On August 18, 2021 Jason Robinson of the Raleigh Regional Office (RRO) conducted a compliance evaluation
inspection of the Duke Energy Roxboro Steam Plant. The assistance provided by Mr. Kevin Clayton (Operator
in Responsible Charge (ORC)), Ms. Amber Sarver (Chemistry & Process Safety Management Supervisor &
bORC) and Lori Tollie (Permitting and Compliance) was appreciated.
• The facility is located at 1700 Dunnaway Road in Semora, North Carolina.
• NPDES permit NCO003425 was modified and issued for the treatment facilities on August 1, 2021 and
expires on June 30, 2025.
• The facility has both Grade I Physical/Chemical Water Pollution Control Systems that treat industrial
wastewater (numerous Outfalls) and a Grade 11 Biological Water Pollution Control system with an as -
built and permitted flow of 0.025 MGD that treats domestic wastewater (Outfall 008).
• The permit authorizes the facility to discharge the treated wastewater through Outfalls 001, 003 and
006, with accompanying monitoring requirements and limits, to receiving waters designated as Hyco
Lake, a waterbody classified as WS-V and B waters within the Roanoke River Basin. The permit also
authorizes the discharge of numerous internal outfalls, with accompanying monitoring requirements
and limits.
Finding during the compliance inspection were as follows:
1. The operator's on -site log and supporting documentation was reviewed and found to be complete.
2. The Roxboro Stem Plant's on -site lab is field certified for and self -reports monitoring data for the
following parameters (Certification Number 5080): pH, Temperature and Turbidity. Meter calibration
logs were reviewed and found to be complete, buffers were within expiration dates, and refrigerator
temperature and log was within range. Samples are transported offsite to the Duke Analytical Lab
(certification number 248) to analyze additional parameters. A few parameters are sent to be
analyzed by a commercial lab.
3. Discharge Monitoring Reports for September 2020 and February 2021 were reviewed and compared
D_E Q

DowSgn Envelope ID: DBDOA05A-7AF1 5A06-BA5476502AC5
to laboratory bench sheets. No discrepancies were noted. Lab results, chain of custody records, and
bench sheets were available for review and found to be complete.
4. All outfalls listed in the permit were observed during the inspection. No issues were found.
All domestic wastewater is treated by a package treatment plant with chorine disinfection (Internal
Outfall 008). The effluent from the package plant goes to the low volume wastewater treatment
system. No issues were found.
This facility was found to be compliant with NPDES permit conditions as a result of this inspection. If you have
any questions regarding the attached reports or any of the findings, please contact Jason Robinson at
Jason.t.robinson@ ncden r.gov).
Sincerely,
CDocuSiyned by:
Valtf sSa f. kAUAXd
82916E6AB32141F
Vanessa Manuel, Assistant Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ
ATTACHMENTS
Compliance Inspection Report
Cc: DWR Laserfiche
Raleigh Regional Office w/attachment
[e-mail]
[e-mail]
[e-mail]
[e-mail]

DocuSign Envelope ID: 098EDE31-B6EA 4,45F-0D1E975F71DF
United States EmAmn"Mal Protection Agency
Form Approved.
EPA Washington. D C 20460
OMB No. 2040-0057
Water Compliance Inspection Report
Approval expires 8-31.98
Section A. National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 IN I 2 u 3 I NCO003425 I11 12 21/08/18 17 181 r 1 191 S I 201 I
2111111111111111111111111111111111111111111I f6
Inspection Work Days Facility Self-Momtonng Evaluation Rating B7 GA Reserved
I 71 I I. 72 I ti I 731 I 174 75I I I I I I I I80
67I 1 70I J L
I—� LL_I LLJ
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
Entry Time/Date
Permit Effective Date
POTW name and NPDES Dermil Number)
01:OOPM 21/08/18
21/08/01
Roxboro Steam Electric Power Plant
1700 Dunaway Rd
Exit Time/Date
Permit Expiration Date
Semora NC 27343
04:OOPM 21/08/18
25/06/30
Names) of Onshe Representative(s)ROes(s)/Phone and Fax Numbers)
Other Facility Data
111
Kevin Danny Clayton/ORC/336-330-2055/
Name, Address of Responsible Officiall7tle/Phone and Fax Number
LORI 'TOLL16 Contacted
yQ
Mana er/336-597-6101/
Section C. Areas Evaluated During Inspection (Check only those areas evaluated)
Permit E Flow Measurement Operations & Maintenar 0 Records/Reports
Effluent/Receiving Wate N Laboratory
Section D Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Jason T Robinson j�oe<ss,�rd by DWR/RRO WQ1919-791�2001 9/8/2021
CSJAx.osL �b10, ovu
l
BF93314C1EE14A9
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
Dxd919nad by.
UAIALSSX f- hi%AA A4.1. DwR/WQRos-RRO/919-791-4232 9/8/2021
"—an 1GE41A8321W
Li -A Norm jmv-j tKBv b-u4) vrevlous editions are obsolete.
Page#

DocuSign Envelope ID: 098EDE31-B6EA
445F-0D1E975F71DF
NPDES
NCO003425 I11
yr/mo/day Inspection Type
1 2110W18 17 18ICI
(Cont.)
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
On August 18, 2021 Jason Robinson of the Raleigh Regional Office (RRO) conducted a compliance
evaluation inspection of the Duke Energy Roxboro Steam Plant. The assistance provided by Mr.
Kevin Clayton (Operator in Responsible Charge (ORC)), Ms. Amber Sarver (Chemistry & Process
Safety Management Supervisor & bORC) and Lori Tollie (Permitting and Compliance) was
appreciated.
The facility is located at 1700 Dunnaway Road in Semora, North Carolina.
• NPDES permit NC0003425 was modified and issued for the treatment facilities on August 1, 2021
and expires on June 30, 2025.
• The facility has both Grade I Physical/Chemical Water Pollution Control Systems that treat
industrial wastewater (numerous Outfalls) and a Grade II Biological Water Pollution Control system
with an as -built and permitted flow of 0.025 MGD that treats domestic wastewater (Outfall 008).
• The permit authorizes the facility to discharge the treated wastewater through Outfalls 001, 003
and 006, with accompanying monitoring requirements and limits, to receiving waters designated as
Hyco Lake, a waterbody classified as WS-V and B waters within the Roanoke River Basin. The permit
also authorizes the discharge of numerous internal outfalls, with accompanying monitoring
requirements and limits.
Finding during the compliance inspection were as follows:
1. The operator's on -site log and supporting documentation was reviewed and found to be
complete.
2. The Roxboro Stem Plant's on -site lab is field certified for and self -reports monitoring data for the
following parameters (Certification Number 5080): pH, Temperature and Turbidity. Meter calibration
logs were reviewed and found to be complete, buffers were within expiration dates, and refrigerator
temperature and log was within range. Samples are transported offsite to the Duke Analytical Lab
(certification number 248) to analyze additional parameters. A few parameters are sent to be
analyzed by a commercial lab.
3. Discharge Monitoring Reports for September 2020 and February 2021 were reviewed and
compared to laboratory bench sheets. No discrepancies were noted. Lab results, chain of custody
records, and bench sheets were available for review and found to be complete.
4. All outfalls listed in the permit were observed during the inspection. No issues were found.
5. All domestic wastewater is treated by a package treatment plant with chorine disinfection (Internal
Outfall 008). The effluent from the package plant goes to the low volume wastewater treatment
system. No issues were found.
This facility was found to be compliant with NPDES permit conditions as a result of this inspection
Page#

DocuSign Envelope ID. 098EDE31-66EA
4451`-0D1E975F71DF
Permit: NC0003425
Inspection Date: 08/18/2021
Owner -Facility: Roxboro Steam Electric Power Plant
Inspection Type: Compliance Evaluation
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? M ❑ ❑ ❑
Does the facility analyze process control parameters. for ex MLSS, MCRT. Settleable 0 ❑ ❑ ❑
Solids, pH, DO, Sludge Judge. and other that are applicable?
Comment:
Permit
Yes
No
NA
NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new
M
❑
❑
❑
application?
Is the facility as described in the permit?
0
❑
❑
❑
# Are there any special conditions for the permit?
❑
0
❑
❑
Is access to the plant site restricted to the general public?
0
❑
❑
❑
Is the inspector granted access to all areas for inspection?
0
❑
❑
❑
Comment
Record Keepinq
Yes
No
NA
NE
Are records kept and maintained as required by the permit?
0
❑
❑
❑
Is all required information readily available, complete and current?
M
❑
❑
❑
Are all records maintained for 3 years (lab. reg. required 5 years)?
M
❑
❑
❑
Are analytical results consistent with data reported on DMRs?
0
❑
❑
❑
Is the chain -of -custody complete?
M
❑
❑
❑
Dates, times and location of sampling
❑
Name of individual performing the sampling
❑
Results of analysis and calibration
❑
Dates of analysis
❑
Name of person performing analyses
❑
Transported COCs
❑
Are DMRS complete: do they include all permit parameters?
M
❑
❑
❑
Has the facility submitted its annual compliance report to users and DWQ?
0
❑
❑
❑
(If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified
M
❑
❑
❑
operator on each shift?
Is the ORC visitation log available and current?
❑
❑
❑
Is the ORC certified at grade equal to or higher than the facility classification?
M
❑
❑
❑
Is the backup operator certified at one grade less or greater than the facility
M
❑
❑
❑
classification?
Page# 3

I .
DocuSign Envelope ID: 098EDE31-86EA 445F-OD1E975F71DF
Permit: NC0003425 Owner -Facility:
Roxboro Steam Electric Power Plant
Inspection Date: 08118/2021 Inspection Type:
Compliance Evaluation
Record Keepinq
Yes
No
NA
NE
Is a copy of the current NPDES permit available on site?
0
❑
❑
❑
Facility has copy of previous year's Annual Report on file for review?
0
❑
❑
❑
Comment:
Laboratory
Yes
No
NA
NE
Are field parameters performed by certified personnel or laboratory?
0
❑
❑
❑
Are all other parameters(excluding field parameters) performed by a certified lab?
M
❑
❑
❑
# Is the facility using a contract lab?
N
❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0
M
❑
❑
❑
degrees Celsius)?
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees?
❑
❑
❑
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees?
❑
❑
0
❑
Comment
Effluent Pipe
Yes
No
NA
NE
Is right of way to the outfall properly maintained?
0
❑
❑
❑
Are the receiving water free of foam other than trace amounts and other debris?
0
❑
❑
❑
If effluent (diffuser pipes are required) are they operating properly?
0
❑
❑
❑
Comment
Page# 4

DUKE
ENERGY®
PROGRESS
File: 12520
Mr. Danny Smith, Director
North Carolina Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy Progress, LLC.
Roxboro Steam Electric Plant
Special Order by Consent (SOC)
EMC SOC WQ S18-005
Interim date compliance submittal
Dear Mr. Smith:
Duke Energy Progress, LLC
Roxboro stems Electric Pion,
1700 Dunaway Road
Sentora, NC 27143
February 11,2020
NC Dept of Environmental Quality
F EB 14 2020
Raleigh Regional Office
In accordance with the NC Environmental Management Commission Special Order by Consent,
EMC SOC WQ S 18-005, Duke Energy Progress, LLC. hereby submits this notification related to
the completion of decanting of the ash basin in accordance with SOC condition 2.b.2.
The subject SOC requires decanting completion by June 30, 2020. While no permit has been
issued authorizing decanting as of the date of this letter, as discussed previously with Department
staff, all wastewater inflows to the West Ash basin were ceased on April 10, 2019. This
occurred with the redirection of plant wastewaters to the site's newly constructed Lined
Retention Basin treatment system. Since that time, the level of water in the northern section of
the ash basin (area north of the internal filter dike) has been reduced significantly.
The water level in the basin has equalized across the north and south sides of the internal filter
dike at approximately elevation 447' (see attached picture 1). Attached pictures 2 and 3 show
the volume of water that has been removed from the ash basin through natural gravity outflow.
Based on elevation changes, the basin has been lowered by approximately 90 million gallons of
wastewater through the gravity drainage process. The elevation has been lowered approximately
13'. Due to the design of the basin, this is the total amount of water that can be decanted from
the basin without allowing water to flow back through the internal filter dike from south to north.
Therefore, as discussed with Department staff, decanting is complete. The area will continue to
be maintained at this level and no mechanical removal of water will commence prior to NPDES
permit receipt.
This notice fulfills our reporting obligation found in section 2.) b. of the subject Order.

(' DUKE
ENERGY.
PROG5I5C
Duke Energy Progress, LLC
Roxboro Steam Electric Plant
1700 Dmmakny Raad
Senmm. NC 27343
If you have any questions, please contact Mr. Shannon Langley at [phone].
I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. 1 am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.
Sincerely,
Tom Copolo — Plant Manager
Roxboro Steam Electric Plant
cc: Jeff Poupart
NC Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Scott Vinson, Supervisor
Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27608

(' DUKE
ENERGY,
PROGRESS
bc: Robert Howard
Lori Tollie/FileNet — via email
Shannon Langley — via email
Duke Energy Progress, LLC
Roxboro Steam Electric Plant
1700 Dunnawav Road
Semora, NC 27343

DUKEDuke Energy Progress, LLC
RosboraElectric Plant
40) ENERGY. 1
700 Dunnna v Rmid
PROGRESS semorn. NC 27343
Pictures of Roxboro ash basin
NC0003425
SOC# WQS 18-05
February 2020
Decanting completion
submittal

(' DUKE
ENERGY,.
PROGRESS
Picture 1
Water level across internal filter dike
Operational level (2016 photo)
January 2020 level
Duke Energy Progress, LLC
Roxboro Steam Electric Plant
1700 Duniumav Rood
Semnra. NC 27343
1

It
I ENERGY.
PROGRESS
Picture 2
Ash basin looking North
Operational level (2016 photo)
January 2020 Level (Gravity decanted)
Duke Energy Progress, LLC
Roxboro Steam Electric Plant
1700 Dunnanay Road
Senana, NC 27343

mi •DUKE
ENERGY.
PROGRESS
Picture 3
Ash basin looking South
Operational level (2016 photo)
January 2020 level
Duke Energy Progress, LLC
Roxboro Steam Electric Plant
I700 Duruwu'oc Rrwd
Senwrtt. NC 27343
,R

Manuel, Vanessa
From: Tollie, Lori White <[e-mail]>
Sent: Wednesday, March 25, 2020 8:43 AM
To: Manuel, Vanessa
Cc: Howard, Robert E; Enoch, Ryan S.; Sarver, Amber Michelle
Subject: [External] Roxboro Permit Number NC0003425 Missed sample
Vanessa,
This email is to summarize our phone call this morning. The Roxboro legacy bioreactor had been out of service due to
low wastewater flows going into the FGD Pond with only a single unit being online during the month of February. The
bioreactor was put into service on Thursday February 13th, 2020 requiring a weekly sample for Be and Hg to be
collected by February 15'. This sample was inadvertently missed.
The oversight was discovered during the monthly eDMR review. The February eDMR will be submitted electronically,
noted as "Non -Compliant' on the summary submission page. Please let me know if you have any further questions or
concerns. Thank you.
Duke Energy
Permitting & Compliance
2500 Fairfax Road
Greensboro, NC 27407
Cell: [phone]
Office: [phone]

DEPARTEMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0003425
Facility Information
Applicant/ FaciliName:
Duke Energy Progress/ Roxboro Steam Electric Generating Plant
Applicant Address:
1700 Dunnawa • Rd., Semora, NC 27343
Facility Address:
1700 Dunnawa y Rd., Semora, NC 27343
Permitted Flow
Not limited
Type of Waste:
99.8 % Industrial, 0.2% - domestic
Facility/Permit Status:
Existing/ Renewal
County:
Person
Miscellaneous
Receiving Stream:
Hyco Reservoir
Stream Classification
WS-V, B
Subbasin:
03-02-05
303 d Listed?:
No
Drainage Area mil :
N/A
Prima SIC Code:
4911
Summer 7Q10 cfs
0
Regional Office:
RRO
30Q2 cfs :
0
Quad
Olive Hill
Average Flow cfs :
0
Permit Writer:
Ser ei Chernikov, Ph.D.
IWC % :
100%
Date:
04/11/2019
Summary
The Roxboro Steam Electric Plant is an electric generating facility that uses steam turbine generation via
four coal-fired units with a with a combined electric generating output of 2558 MW: Unit No. 1(385 MWe),
Unit No. 2 (670 MWe), Unit No. 3 (707MWe) and Unit No. 4 (700 MWe).
The facility discharges to subbasin 030205 in the Roanoke River Basin. The facility operates five internal
outfalls and two outfalls to Hyco Reservoir. Discharges are mostly industrial, with a very small domestic
flow (internal Outfall 008) piped to the on -site ash pond. Discharges from the ash pond (internal Outfall
002), once -through cooling water and FGD treatment system (internal outfall 010) are discharged to the
Heated Water Discharge Pond (outfall 003). The Heated Water Discharge Pond and Coal Pile Runoff
(outfall 006) both discharge to Hyco Reservoir. The Hyco Reservoir is a 17.6 km2 waterbody constructed
in 1963 by CP&L to serve as a cooling water source. The receiving waterbody is class WS-V; B. The facility
is located in the Lower Piedmont area of the state, the applicable state water quality temperature
standard is 32'C (89.6' F).
This facility is subject to EPA effluent guideline limits per 40 CFR 423 - Steam Electric Power Generating
Point Source Category which were amended November 3, 2015. The facility is also subject to the Cooling
Water Intake Structures Rules (40 CFR 125) effective October 14, 2014. The intake flow is > 125 MGD.
Duke requested the addition of three new outfalls on the permit; two to reflect the future treatment
systems for the low volume wastes as the ash basin will be closed and one for the overflow from the east
ash basin extension and stormwater runoff.
Description of existing outfalls:
Outfall 003 - Heated Water Discharge Pond to Hyco Reservoir. This pond combines all internal outfalls
(002, 005, 008, 009, 010) before discharging to Hyco Reservoir. In addition, once -through cooling water
from condensers for units 1, 2, and 3, once -through cooling water from heat exchangers, seepage from ash
pond, and stormwater runoff from plant drainage areas are discharged to the discharge pond.

NPDES PERMIT FACT SHEET Roxboro Steam Electric Plant
Page 2 NPDES No. NC00003425
Outfall 006 - Coal Pile Runoff discharges directly to Hyco Reservoir. Coal pile runoff wastewaters
include runoff from the coal pile, limestone pile and gypsum pile, truck wheel wash area and coal
handling areas. Treatment is accomplished by neutralization, sedimentation and equalization. This is an
episodic discharge.
Internal Outfall 002 - Ash Pond discharging to the heated water discharge pond. The ash pond receives
wastewater from the following source:
• Bottom ash transport waters
• Silo wash water
• Ash landfill leachate and runoff (this landfill receives CCR from Mayo and Roxboro
plants)
• Dry -ash handling system wash water
• Blowdown from Unit 4 cooling tower
• Coal mill rejects and pyrites
• Sewage treatment plant effluent
• Low volume waste consisting of boiler blowdown, equipment maintenance cleaning
wastewaters, RO reject wastewater and floor drains. Low volume wastes are treated by
neutralization.
• Emergency overflow from FGD system blowdown
Internal Outfall 005 - Cooling tower blowdown from Unit 4.
Internal Outfall 008 - Treated domestic wastewater. The treatment system consists of a screen,
communitor, surge tank, aeration tank, clarifier, chlorine contact chamber and sludge holding tank. A
new package plant will be installed to replace the existing plant.
Internal Outfall 009 - Chemical metal cleaning waste. Wastewaters from cleaning of the boilers is
generated every five to eight years. Every three to five years wastewaters are generated from cleaning the
heat exchangers. The wastewaters generated can be treated by evaporation or by neutralization and
precipitation.
Internal Outfall 010 - Flue Gas Desulfurization (FGD) treatment system discharging to the discharge
canal. The scrubber system removes SOx by mixing flue gas with a limestone slurry. The blowdown from
the scrubber is discharged to a gypsum settling pond system then to a bioreactor which utilizes
microorganisms to reduce soluble contaminants to insoluble forms (under anaerobic conditions) that then
precipitate from solution. Wastewater is discharged to the ash pond effluent channel. An emergency
overflow from the FGD system blowdown discharges to the ash pond.
Proposed Outfalls:
Outfall 001- Stormwater and the oveflow from the east ash basin extension. The east ash basin was
closed and subsequently a landfill was built over the old basin. A portion of the basin remained as an
open pond. It has come to the attention of the Division that there are some coal combustion residuals
within the pond. The Division has requested that Duke removes the residuals. In addition to the pond
overflow this outfall discharges stormwater runoff.
Internal Outfalls 012A, 012B and 012C - Low volume waste and other wastewaters. Duke will build two
basin treatment systems to treat wastewaters that now go to the ash basin. The basins will discharge to
the heated discharge pond and an emergency overflow from one of the basins will discharge to Hyco
Lake (012C).

NPDES PERMIT FACT SHEET Roxboro Steam Electric Plant
Page 3 NPDES No. NC00003425
CWA 316 (b)
The permittee shall comply with the Cooling Water Intake Structure Rule per 40 CFR 125.95. The Division
approved the facility request for an alternative schedule in accordance with 40 CFR 125.95(a)(2). The
permittee shall submit all the materials required by the Rule by May 31, 2022. This is an accelerated
schedule that includes: I year for the development of the sampling plan and obtaining approval from the
Division, 2 years of sampling to adequately characterize seasonal variation, and 1 year for the report
development Based on the results of the studies, the Division may require an implementation of the
additional measures to reduce impingement and entrainment of the aquatic organisms.
The facility's total intake is designed for approximately 1,114 MGD. Units No.1 and 2 use condensers as
cooling devices. Units No. 3 and 4 use cooling towers as cooling devices. Units 1 and 2 operate in a once -
through cooling mode year round. Unit 3 operates in a once -through cooling mode part of the year
(October 15th - April 30th) and during summer months (May 1st - October 14th) condenser cooling water
is routed to once -though mechanical draft cooling tower. Unit 4 is equipped with closed -cycle
evaporative cooling towers that operate year-round. The CWIS for Unit 4 (CWIS 4) is located on the north
bank of the heated water discharge pond, adjacent to the Unit 4 closed -cycle cooling tower. As a result,
there is no net increase in cooling water withdrawal for the Unit 4 cooling tower make-up water.
The CWiS for Units 1-3 (CWIS 1) is located at the intake forebay immediately east of the Unit 1 turbine -
generator. Cooling water for Units 1-3 is withdrawn through eight bays in CWIS 1 via a 1.7-mile intake
canal located east north-east of the plant The intake canal directs water to an intake pond which is
connected to the CWIS 1 intake forebay area via a submerged culvert. Unit 1 consists of two intake bays
equipped with one circulating water pump per bay. Units 2 and 3 each consist of three intake bays
equipped with one circulating water pump per bay. Each of the eight intake bays for CWIS 1 is equipped
with trash racks and coarse -mesh (3/8-inch mesh size) vertical traveling screens with a debris spray wash
system and debris collection trough.
Duke Enerev provided the following iustification as Basis for Designation Belews Station as a Closed
Cycle Recirculation System:
A "closed -cycle recirculating system' is defined at 40 CFR 125.92 (c). The definition addresses
facilities with CCRS that withdraw from waters of the United States where the impoundment was
constructed for the purpose of providing cooling water for the facility:
"Closed -cycle recirculating system also includes a system with impoundments
of waters of the U.S. where the impoundment was constructed prior to October
14, 2014 and created for the purpose of serving as part of the cooling water
system as documented in the project purpose statement for any required Clean
Water Act section 404 permit obtained to construct the impoundment. In the
case of an impoundment whose construction pre -dated the CWA requirement
to obtain a section 404 permit, documentation of the project's purpose must be
demonstrated to the satisfaction of the Director. This documentation could be
some other license or permit obtained to lawfully construct the impoundment
for the purposes of a cooling water system, or other such evidence as the
Director finds necessary." 40 CFR 125.92 (c)(2).
Impoundments are further defined and discussed as a dosed -cycle cooling system in the rule's
preamble, stating that
"Impoundments are surface waterbodies that serve as both a source of cooling water
and a heat sink. As with cooling towers, impoundments rely on evaporative cooling
to dissipate the waste heat; a facility withdraws water from one part of the
impoundment and then discharges the heated effluent back to the impoundment,

NPDES PERMIT FACT SHEET
Page 4
Roxboro Steam Electric Plant
NPDES No.NC00003425
usually in another location to allow the heated water time to cool. Depending on
local hydrology, impoundments may also require makeup water from another
waterbody. Impoundments can be man-made or natural, and can be offset from
other water bodies or as part of a "run of the river" system (the latter are sometimes
referred to as cooling lakes)." 79 Fed. Reg. 48,334 (August 15, 2014)
The system at Roxboro meets the criteria for classification as a CCRS. Roxboro withdraws cooling
water from Hyco Lake which was constructed in a water of the United States for the purpose of
providing cooling water for the Carolina Power & Light Company (now Duke Progress, LLC)
Roxboro Steam Electric Plant prior to the Clean Water Act 404 permitting program. The Carolina
Power & Light Company received authorization for the creation of Hyco Lake in April 1964 for the
Roxboro facility. Numerous documents issued by the State contain several statements and
commensurate justification that the purpose of Hyco Lake was to be "operated ... to reduce
pollution [via condenser cooling water recirculation] in the Hyco River' and is a "cooling pond":
• State of North Carolina Department of Water and Air Resources Permit 522 issued May 4,
1964
• Carolina Power & Light Company, North Carolina State Stream Sanitation Committee
"Application for Approval of Plans" dated April 13,1964
• North Carolina Board of Water and Air Resources Permit 522 Certification dated October
1,1971
North Carolina Environmental Management Commission Permit 2523 issued July 22,1974
The permit issued by the State of North Carolina Department of Water and Air Resources (the
predecessor Agency to the North Carolina Department of Environmental Quality) authorized
...operation of a 3,800 acre cooling lake for a design flow of 2,400,000,000 G.P.D., and the
discharge of the effluent into the Hyco River, a tributary in the Roanoke River Basin". The dam
was completed in 1964 and Hyco Lake reached full pool elevation in 1965.
As also required by the definition, make-up water withdrawals attributable to the cooling portion
of the Roxboro cooling system have been minimized. The source of all makeup water is the
approximately 300 square mile Hyco lake watershed. No other sources of makeup water are
currently available and none are planned.
In addition to minimizing withdrawals for make up water to Hyco Lake, Roxboro also minimizes
cooling water withdrawals from Hyco Lake in multiple ways. First, Unit 4 operates on
recirculating cooling towers that require only small volumes of makeup waters. Those make up
waters are taken from internal process areas consisting of Unit 1-3 cooling water discharge and the
ash basin discharge flows. Second, the cooling water system for Units 1-3 has several design
features that increase their efficiency, including (a) directing deeper, cooler water to the intake as
needed to maintain efficiency by using cooler water from deeper in the reservoir; (b) routing of
cooling water discharges as far as possible upstream from the cooling water intake (subject to
constraints imposed by the Department for thermal impact reasons); and (c) utilization on Unit 3
of a helper cooling tower seasonally which reduces the thermal discharge load to the lake and
allows for more efficient cooling during the summer months. Third, as reflected in the company's
Integrated Resources Plans, filed with the North Carolina Utilities Commission, Roxboro has
operated since 2016 as an "Intermediate" rather than "Baseload" generation source. The reduction
in operating time has resulted in a reduction of average daily withdrawals from greater than 800
MGD when the plant operated as Baseload to 592 MGD in 2018, as reported in the station's annual
water withdrawal reports.
4

NPDES PERMIT FACT SHEET Roxboro Steam Electric Plant
Page 5 NPDES No. NC00003425
The Division concurs with the justification provided by Duke on a provisional basis. Based on 40
CFR 125.92 (c) the Director has determined that operating and maintaining the existing closed -
cycle recirculating system meets the requirements for a provisional BTA. The final determination
will be made upon review of the materials submitted by the permittee. This determination is
consistent with the EPA Region W decision regarding Robinson station and Belews station, and
the EPA Region III decision regarding North Anna station.
Temperature Mixing Zone - Outfall 003
The facility is located in the Lower Piedmont area of the state, the applicable state water quality
temperature standard is 32°C (89.6° F). The authorized temperature mixing zone for outfall 003 includes
the North Hyco Arm downstream of NC Hwy 57, the main body of Hyco Reservoir downstream of the
confluence of the Cobbs Creek Ann and the North Hyco Arm and the entire after bay lake. USGS data at
the after bay monitoring station (USGS Station 02077303) was reviewed for the period of January 2011 to
April 2016. Data shows that the temperature water quality standard was not exceeded for this period.
Maximum temperature recorded was 305C.
Instream Monitorine
The permit requires monitoring of Hyco Reservoir in accordance to the Biological Monitoring Program as
approved by the Division. Based on the Divisions review of the reports the fish community is
comparable to other piedmont reservoirs and no problems were noted. The draft permit includes
instream monitoring for total arsenic, total selenium, total mercury, total chromium, dissolved lead,
dissolved cadmium, dissolved copper, dissolved zinc, total bromide, total hardness (as CaCO3), turbidity,
and total dissolved solids (TDS). The draft permit also includes annual fish tissue monitoring.
DATA REVIEWPERMIT REQUIREMENTS
Internal Outfall 002 - Ash Pond
This outfall is subject to the Effluent Limitations Guidelines (ELG) in Table 1.
Table 1. ELG Outfall 002 (Prior to November 1, 2018)
Pollutant
Daily Maximum
Monthly Average
ELG
TSS
100 m /L
30 mg/ L
40 CFR 423.12 4
Oil & Grease
20 m / L
15 mg/ L
40 CFR 423.12 4
The current permit requires monitoring for flow and total selenium, limits for Oil & Grease and TSS. A
summary of DMR data for the period of January 2011 to January 2016 is included in Table 2. There have
been no violations of permit limits or conditions.
Table 2. DMR Summary Outfall 002
Parameter
Average
Maximum
Minimum
Flow
10.8 MGD
48.3 MGD
3.1 MGD
TSS
5m /L
21m /L
<2.5mg/ L
Total Selenium
14.6 µ /L
68.8 µ /L
< 10 µ /L
O&G
<5m L
13.5m /I
<5m L
Table 3. Monitoring Requirements/Proposed Changes Outfall 002
Parameter
Monitoring requirements
Chan s
Basis
Flow
Monitor
No chan es
15A NCAC 2B.0505
TSS
30 mg/L monthly aver
100 m /L daily max
No changes
40 CFR 423.12(b)(4)

NPDES PERMIT FACT SHEET
Page 6
Roxboro Steam Electric Plant
NPDES No.NC00003425
Oil & Grease
15 mg/L monthly aver
No Changes
40 CFR 423.12(b)(4)
20 m /L daily max
Total Selenium
Monthly monitoring
No changes
Pollutant of concern
Turbidity, pH
No requirement
Monitor
Pollutant of concern for
dewatering/decanting
Schedule of Compliance Fly Ash/Bottom Ash:
As per 40 CFR 423.13 (k) (1) (i) bottom ash transport water shall not be discharged, compliance with this
section shall be as soon as possible beginning on November 1, 2020, but no later than December 31, 2023.
Duke utilizes wet bottom ash transport system. Duke is proposing to install a remote mechanical drag
chain system. Design of the system is expected to be completed in 8 months, followed by procurement in
12 months. Construction is expected to be completed in 13 months. Duke proposes a 16 month window
to optimize the system at full load and additional 6 months for potential permitting delays.
Consideration was given to the fact that Duke will be undertaking design, procurement and installation
activities in multiple facilities simultaneously. Duke will meet the no discharge of bottom ash
requirement by April 30, 2021.
Fly ash transport water is no longer discharged therefore Duke meets the compliance date of November
1, 2018.
Internal Outfall 002 - Dewaterine
To meet the requirements of the Coal Ash Management Act of 2014, the facility needs to dewater two ash
ponds by removing the interstitial water and excavate the ash to deposit it in landfills. The facility's
highest discharge rate from the dewatering process will be 2 MGD. The facility submitted data for the
standing surface water in the ash ponds, interstitial water in the ash, and interstitial ash water that was
treated by filters of various sizes. The following pollutants were detected at concentrations higher than
the water quality standards: selenium, arsenic and molybdenum. A new effluent and monitoring sheet is
included in the permit for the ash pond dewatering phase. As this is an internal outfall the water quality
standards are not applied. Monitoring will be required for selenium, arsenic, molybdenum, antimony,
mercury and copper.
Outfall 003 - Heated Water Discharge Pond (Combined outfalls)
DMR/Compliance Review
Data were reviewed for the period of January 2011 to March 2016. There have been no violations of
permit limits or conditions.
Table 4. DMR Summary Outfall 003
Parameter
Average
Maximum
Minimum
Flow MGD
840
1130
6.9
TRC
Not discharged
TP m /L
< 0.036
< 0.05
< 0.05
TN m L
0.68
1.08
0.44
Temperature
29
41
130C
Total Arsenic µ L
6.2
17.1
< 2.8
H SU
7.34
8
6.38
Toxicity Testing (003):
Current Requirement Acute P/F at 90%, February, May, August, November.
Proposed Requirement: Acute P/F at 90%, February, May, August, November.
The facility passed 21 tests out of 21 tests performed for the period of January 2011 to January 2016.

NPDES PERMIT FACT SHEET Roxboro Steam Electric Plant
Page 7 NPDES No. NC00003425
Reasonable Potential Analysis Outfall 003:
The Division conducted EPA -recommended analyses to determine the reasonable potential for toxicants
to be discharged at levels exceeding water quality standards/EPA criteria by this facility from outfall 003.
For the purposes of the RPA, the background concentrations for all parameters were assumed to be below
detection level. The RPA uses 95% probability level and 95% confidence basis in accordance with the EPA
Guidance entitled "Technical Support Document for Water Quality -based Toxics Control." With the
approval of the Triennial Review (2007-2014) of the NC Water Quality Standards by the Environmental
Management Commission (EMC) in 2014 and US -EPA (with some exceptions) on April 6, 2016, the
NPDES Permitting Unit is required to implement the new dissolved metal standards in all permits public
noticed after April 6, 2016. The RPA included evaluation of dissolved metals' standards, utilizing
measured hardness value of 100 mg/L CaCO3 for hardness -dependent metals.
A reasonable potential analysis was conducted for arsenic, copper, nickel, selenium, strontium, thallium,
chlorides and zinc. Arsenic data used for the RPA was collected between 2011 and 2016. Data for the
remaining parameters was from a special study for the period of March 2010 to August 2011. Based on
this analysis, the following permitting actions are proposed for this permit
• Monitoring Only. The following parameters will receive a monitor -only requirement since they
did not demonstrate reasonable potential to exceed applicable water quality standards/criteria,
but the maximum predicted concentration was >50% of the allowable concentration: Arsenic,
selenium, chloride.
• No Limit or Monitoring: The following parameters will not receive a limit or monitoring, since
they did not demonstrate reasonable potential to exceed applicable water quality
standards/criteria and the maximum predicted concentration was <50% of the allowable
concentration: copper, nickel, strontium, and zinc.
Mercury Evaluation Outfall 003:
A mercury evaluation was conducted in accordance with the permitting guidance developed for the
implementation of the statewide Mercury TMDL to determine the need for a limit and Mercury
Minimization Plan (MMP). Monitoring for mercury is not required for outfall 003 but mercury data was
collected during a special study during the period of March 2010 to August 2011. The water quality based
effluent limitation (WQBEL) for mercury is 12 ng/1. The technology based effluent limit (TBEL) is 47
ng/1. None of the annual averages exceeds the WQBEL or TBEL, no limit is required. See the attached
mercury evaluation spreadsheet
Table 5. Mercury Evaluation
2010
2011
# of Samples
20
16
Annual Average, n /L
3.6
4.4
Maximum Value, n L
7.63
6.92
TBEL, n /L
47
WQBEL, n /L
12.0
Table 6. Monitoring Reauirements/Proposed Changes Outfall 003
Parameter
Monitoring
Changes
Basis
reguirement5Limits
Flow
Monitor
I No changes
I 15A NCAC 2B.0505

NPDES PERMIT FACT SHEET
Page 8
Roxboro Steam Electric Plant
NPDES No. NC00003425
TRC
200 µg/L
Modified limit to
State WQ standards, 15A NCAC
instantaneous max
28 µg/ L daily max
2B .0200. The water quality
standard is more stringent than
the effluent guidefines limit.
TP
Monitor
No changes
15A NCAC 2B .0500
TN
Monitor
No changes
15A NCAC 2B .0500
Temperature
Monitor
No changes
A roved Mixing zone
Total Arsenic
Monitor
No changes
Based on results from RPA,
Predicted concentration greater
than 50% of allowable.
Total Selenium
No requirement
Quarterly monitoring
Based on results from RPA,
Predicted concentration greater
than 50% of allowable.
Total Thallium
No r ement
Quarterly monitoring
Pollutant of concern.
Chloride
No requirement
Quarterly monitoring
Based on results from RPA,
Predicted concentration greater
than 50% of allowable.
PH
6 to 9 SU
No changes
State WQ standards, 15A NCAC
2B .0200
Acute toxicity
P/F 90%
No changes
State WQ standards, 15A NCAC
2B .0200
Internal Outfall 005 - Cooling Tower Blowdown from Unit 4
This outfall is subject to the ELGs in Table 7.
Table 7. ELG Outfall 005
Free Available
Chlorine
Daily Maximum
0.5 mg/L
Monthl Aver a
0.2 mg/L
ELG
40 CFR 423.12 (d) (1)
126 Pollutants
No detectable amounts
40 CFR 423.13 d 1
Total Chromium
0.2 m /L
0.2 m /L
40 CFR 423.13 d 1
Total Zinc
1.0 m /L
1.0 m /L
40 CFR 423.13 d 1
The permit includes monitoring for flow and Total Residual Chlorine (TRC), limits for Free Available
Chlorine, Total Chromium, Total Zinc and 126 priority pollutants.
Special condition A. (14) in the current permit doesn't allow the discharge of the cooling tower blowdown
to the discharge pond, it has to be discharged to the ash pond. With the modifications planned to the site
and the future closure of the existing ash pond Duke will like to have the option to discharge the
blowdown to the discharge pond. This will continue to be an internal outfall subject to the same limits
under 40 CFR 423. The limits apply before it comingles with any other waste stream so there is no change
in limits or other permit conditions by allowing the cooling tower blowdown to discharge into the
discharge pond.
DMR/Compliance Review:
Data were reviewed for the period of January 2011 to January 2016. There have been no violations of
permit limits or conditions. Flow was the only parameter monitored at this outfall since the facility did
not chlorinate or added chromium or zinc for maintenance activities. Flow is reported as 7.2 MGD on a
daily basis.

NPDES PERMIT FACT SHEET
Page 9
Table 8. MonitoringRe uirements/ Proposed Changes Outfall 005
Roxboro Steam Electric Plant
NPDES No. NC00003425
Parameter
Monitoring
Changes
Basis
RequirementWLimits
Flow
Monitor
No changes
15A NCAC 2B.0505
Free available
500 µg/L daily max
No changes
40 CFR 423.13 (d)(1)
chlorine
200 µ /L monthlyaverage
Total Residual
Monitoring
No changes
40 CFR 423.13 (d)(2)
Chlorine
Total chromium
200 µg/L daily max
No changes
40 CFR 423.13 (d)(1)
200 µ L monthly average
Total Zinc
1.0 mg/L daily max
No changes
40 CFR 423.13 (d)(1)
1.0 mL monthlyaverage
The 126 priority
No detectable amount
No changes
40 CFR 423.13 (d)(1)
pollutants
Outfall 006 - Coal Pile Runoff
This outfall is subject to the ELG in Table 9.
Table 9. ELG Outfall 006
Pollutant
Daily MiMum
Monthly Average
ELG
TSS
50 m / L
40 CFR 423.12 b 9
H
6 to 9 SU
40 CFR 423.12 b l
DMR/Compliance Review:
Data were reviewed for the period of January 2008 to March 2013. There have been no violations of
permit limits or conditions.
Table 10. DMR Summary Outfall 006
Parameter
Average
Maximum
Minimum
Flow MGD
0.23
0.05
0.002
TSS m / L
2.6
76.6
< 2.5
H SU
7.39
8.9
6.04
Priority Pollutant Scan:
The application included the results of one scan. Selenium was detected above the water quality
standard.
This is an episodic discharge. The pond only discharges under heavy rain events, therefore limits will be
applied as acute limits.
Table 11. Monitoring Requirements/Proposed Changes Outfall 006
Parameter
Monitoring
Changes
Basis
requirements/Limits
Flow
Monitor
No changes
15A NCAC 2B .05
TSS
50 mg/L instantaneous
No changes
40 CFR 423.12(b)(9)
max
H
6 to 9 SU
No changes
40 CFR 423.12 1
Total selenium
No requirement
56 Mg L Daily Max
RPA
State WQ standards, 15A
Acute toxicity
P/F 90%
No changes
NCAC 2B .0200

NPDES PERMIT FACT SHEET
Page 10
Internal Outfall 008 - Domestic W WTP
Table 12. DMR Review Outfall 008
Roxboro Steam Electric Plant
NPDES No. NC00003425
Parameter
Average
Maximum
Minimum
Flow MGD
0.007
0.01
0.002
TSS m /I
14.7
30
5
H S
6.8
7.3
6.5
BOD m /L
10.4
28
2.1
NH3N m /L
0.8
1.6
<0.1
Table 13. Monitoring Requirements/Proposed Chances Outfall 008
Parameter
Monitoring
Changes
Basis
requirements imits
Flow
0.015 MGD
0.025 MGD
W WTP was upgraded
TSS
30 mg/ L monthly
No changes
NPDES rules for secondary
aver
treatment of domestic
45 mg/ L daily max
wastewater,15A 2B .0400
pH
6 to 9 SU
No changes
State WQ standards,15A 2B
0200
BOD
30 mg/ L monthly
No changes
NPDES rules for secondary
aver
treatment of domestic
45 mg/ L daily max
wastewater,15A 2B .0400
Total ammonia
Monitor
No changes
DWQ Policy
Internal Outfall 009 - Chemical cleaning waste
Table 14. Monitoring Requirements/ Proposed Changes Outfall 009
Parameter
Monitoring
Changes
Basis
requirements/Limits
Flow
Monitor
No changes
15A NCAC 26.0505
Total Copper
1.0 mg/ L monthly aver
No changes
40 CFR 423.13 (e)
1.0 m /L daily max
Total Iron
1.0 mg/L monthly aver
No changes
40 CFR 423.13 (e)
1.0 m L dail max
TSS
30 mg/L monthly aver
No changes
40 CFR 423.13 (e)
100 m / L dail max
Oil & Grease
15 mg/L monthly aver
No changes
40 CFR 423.13 (e)
20 m / L dail max
Internal Outfall 010 - FGD
This outfall is subject to the Effluent Limitations Guidelines (ELG) in Table 15. These are new limitations
promulgated November 3, 2015.
Table 15. ELG Outfall 010
Pollutant `'"'' ""
Daily`Maximum I Monthly Average
ELG
H
6to9SU
40CFR 423.12 1
TSS
100 m L
30 m L
40 CFR 423.12 11
Oil and grease
20 mg/ L
15 m /L
40 CFR 423.12 11
Total Arsenic
11 µ /L
8 µ /L
40 CFR 423.13 1 i
Total Mercury
788 n L
356 n L
40 CFR 423.13 l i
Total Selenium
23 µ /L
12 µ L
40 CFR 423.13 1 i
Nitrate/nitrite
17 mg/ L
4.4 mg/ L
40 CFR 423.13 1 i
10

NPDES PERMIT FACT SHEET
Page I 1
Roxboro Steam Electric Plant
NPDES NO. NCO0O03425
The current permit includes monitoring for flow, total beryllium, total mercury, total antimony, total
selenium, total silver and total vanadium. Table 16 includes a summary of DMR data for the period of
January 2011 to January 2016. There have been no violations of permit limits or conditions.
Table 16. DMR Summary 0utfa11010
Parameter
Average
Maximum
Minimum
Flow MGD
0.84
1.77
0.01
Total Beryllium µ /L
3.9
10
< 1
Total Mercury µ L
1.08
9.6
< 1
Total Selenium µ /L
102
712
< 50
Total Silver µ / L
6
8.4
< 5
Total Antimon µ L
31
70
< 25
Total Vanadium µ / L
< 25
< 25
< 5
Table 17. Monitorine Requirements/Proposed Chances Outfall 010
Parameter
Monitoring
requirements/Limits
Changes
Basis
Flow
Monitor
No changes
15A NCAC 2B.0505
Total Beryllium
Monitor
Remove monitoring
Internal outfall, not a
parameter of concern.
Total Vanadium
Monitor
Remove monitoring
Internal outfall, not a
arameter of concern.
Total Antimony
Monitor
Remove monitoring
Internal outfall, not a
parameter of concern.
Total Silver
Monitor
Remove monitoring
Internal outfall, not a
arameter of concern.
Total Arsenic
No monitoring
11 µg/ L daily max and
8 µg/L monthly
40 CFR 423.13 (g) (1) (f)
average
Total Selenium
Monitor
23 µg/L daily max and
12 µg/ L monthly
40 CFR 423.13 (g) (1) (1)
average
Nitrate/Nitrite
No monitoring
17 mg/L daily max and
4.4 mg/L monthly
40 CFR 423.13 (g) (1) (i)
average
Total Mercury
Monitoring
788 ng/L daily max
and 356 ng/ L monthly
40 CFR 423.13 (g) (1) (i)
average.
Schedule of Compliance FGD:
40 CFR 423 establishes compliance dates for the new limitations. Permittee must meet limits as soon as
possible beginning on November 1, 2020 but no later than December 31, 2023.
Duke utilizes a biological treatment system to treat FGD wastewaters. Duke anticipates that it will be
required to install physical/chemical treatment followed by selenium reduction technology to meet the
FGD guidelines. Evaluation of new technologies, design, and siting of the system is expected to take 30
months. The evaluation phase includes evaluation of existing treatment system, flow optimization, siting
of the new system within the plant, selection of technology and permitting. Procurement is expected to be
completed in 20 months, construction and tie-in expected to be completed in 16 months considering that
tie-in has to be done during outages. Startup and optimization under all expected operating conditions is
estimated for 15 months. An additional 6 months is included in the schedule for potential permitting
delays. Duke will meet the FGD ELG by December 31, 2021. As the new treatment system will be placed

NPDES PERMIT FACT SHEET Roxboro Steam Electric Plant
Page 12 NPDES No. NC00003425
in operation and the old pond may still discharge until it is decommissioned a new outfall is included in
the permit for the new system.
Provosed Outfalls Requirements:
Outfall 001
RPA: An RPA was conducted for proposed outfall 001. RPA was conducted for total arsenic, cadmium,
chlorides, total chromium, total copper, total lead, total mercury, total molybdenum, total nickel,
selenium, total zinc, antimony, sulfate and total thallium. As a result of the RPA limits are required for
the following parameters: arsenic, fluoride, sulfides and selenium.
Mercury
Mercury data was collected during 2014 and 2015.2014 data was collected using method 245 which has a
higher detection limit that 1631. Data for 2015 was used to evaluate a need for a limit. The annual average
was 5.2 ng/1, no limit will be implemented.
Table 18. Outfall 001 Proposed Limits/Monitorine:
Parameter
Monitoring requirementWLimits
Basis
Flow
Monitor
15A NCAC 213.0505
pH
6 to 9 SU
State WQ standards,15A 213.0200
Total arsenic, total copper, total
Monitor
Coal ash parameters of concern.
antimony, total lead, total zinc,
total barium, total iron, total
manganese, total nickel, total
mercury, and chlorides
Total Selenium
5 µg/L Monthly Average
RPA
56 µg/L Daily Max
Total Arsenic
10 µg/L Monthly Average
RPA
340 µg/L Daily Max
Fluoride
1.8 mg/L Monthly Average
RPA
1.8 mg/ L Daily Max
Sulfates
250 mg/L Monthly Average
RPA
250 mg/L Daily Max
TDS, Hardness, Conductivity
Monitor
Parameters of concern
Acute toxicity
Quarterly Limit
State WQ standards,15A NCAC
2B .0200
Low Volume Waste Treatment System:
Two new treatment systems will be installed to treat wastewaters currently delivered to the ash basin.
Low volume wastes, metal cleaning wastes, stormwater, and other miscellaneous wastes that are routed
to the ash basin will be rerouted to new treatment systems. Duke proposes two separate treatment
systems. The new outfalls will be designated as outfall 012A and outfall 012B. The overflow from the
012B basin will be designated as outfall 012C. Duke estimated that design, construction and start up of
the new treatment system will be completed within 30 months of permit issuance.
12

NPDES PERMIT FACT SHEET Roxboro Steam Electric Plant
Page 13 NPDES No. NC00003425
Internal Outfall 012A - treatment system for the landfill stormwater, treated extracted groundwater,
contact and non -contact storm water and discharging to the discharge pond.
Table 19.Outfall 012A Proposed Limits/Monitoring:
Parameter
Monitoring
Basis
requirements/Limits
Flow
Monitor
15A NCAC 213.0505
Total Suspended Solids
30 mg/L Monthly Average
40 CFR 423.12 (b)(3)
100 m /L Daily Max
Oil & Grease
15 mg/L Monthly Average
40 CFR 423.12 (b)(3)
20 m /L Daily max
Total arsenic, total selenium, total
Monitor during ash basin
Parameters of concern
mercury, total molybdenum, total
closure
antimony, total copper
Internal Outfall 012B - treatment system for plant low volume wastes, FGD treatment system effluent,
domestic waste treatment system, anhydrous ammonia emergency discharge, metal cleaning wastes,
stormwater runoff, and cooling tower blowdown. The discharge from outfall 012B will go to the discharge
canal.
Table 20. Outfall 012E Proposed Limits/Monitoring:
Parameter
Monitoring requirements/Limits
Basis
Flow
Monitor
15A NCAC 2B.0505
Total Suspended Solids
30 mg/L Monthly Average
100 m L Daily Max
40 CFR 423.12 (b)(3)
Oil & Grease
15 mg/L Monthly Average
20 m L Daily max
40 CFR 423.12 (b)(3)
Ammonia
Monitor
Monitor during emergency discharge
of anhydrous ammonia
Emergency Outfall 012C - This is the emergency overflow from the low volume waste treatment system
(Outfall 012B)
Table 21. Outfall 012C Proposed Limits/Monitoring:
Parameter
Monitoring
requirements/Limits
Basis
Flow
Monitor
15A NCAC 213.0505
Total Suspended Solids
30 mg/L Monthly Average
100 m L Daily Max
40 CFR 423.12 (b)(3)
Oil & Grease
15 mg/L Monthly Average
20 mg /L Daily max
40 CFR 423.12 (b)(3)
Ammonia
1.0 mg/L Monthly average
5.0 mg/L Daily max
Monitor during emergency
discharge of anhydrous ammonia
Arsenic
Monitor
Parameter of concern
Mercury
Monitor
Parameter of concern
Selenium
Monitor
Parameter of concern
Nitrate/ nitrite
Monitor
Parameter of concern
Copper
Monitor
Parameter of concern
Iron
Monitor
Parameter of concern
13

NPDES PERMIT FACT SHEET
Page 14
Public Notice/Public Hearing
Roxboro Steam Electric Plant
NPDES No. NCO0003425
The first draft of this permit was public noticed on August 30, 2016. A public hearing was held on October
4, 2016. A second public notice was done on January 21, 2017 since the first notice went to a newspaper out
of the area.
Summary of permit modifications:
• A separate effluent page for the dewatering of the ash ponds (Outfall 002) was added to the
permit.
• Outfall 001 was reinstated to monitor discharge of seeps and stormwater.
• A new internal outfall (Outfall 011) was added to the permit to monitor the discharge from the
proposed FGD treatment system.
• Special Condition A. (14) that prohibited the discharge of cooling tower blowdown from outfall
005 to the discharge canal was eliminated from the permit.
• A special condition was added to describe Section 316(b) requirements for submittal of applicable
information.
• A special condition was added to the permit to require an Ash Pond Closure Plan.
• A Special Condition was added to the permit to require compliance with Senate Bill 729 (Coal
Ash Management Act).
• Attachment 1 entitled "Groundwater Monitoring Plan" was added to the permit.
• Attachment 2 entitled "Plan for Identification of New Discharges" was added to the permit.
Summary of modifications to October 2016 permit:
• Condition A. (1) Effluent Limitations and Monitoring Requirements for seeps - monitoring
requirements were updated to include the same list of parameters monitored for seeps in other
Duke permits.
• Condition A. (2) Effluent Limitations and Monitoring Requirements for the ash basin -
monitoring was added for arsenic, molybdenum, and chromium. In addition, a statement was
added with the requirement to use physical/chemical treatment during dewatering.
• Condition A. (2) & A. (3) Effluent Limitations and Monitoring Requirements for the ash basin -
Statement regarding no discharge of fly ash was modified to read that no discharge of fly ash is
allowed. The statement pertaining to the schedule of compliance with the ELG for zero
discharge of bottom ash was corrected to read April 30, 2021 instead of November 1, 2018.
• Condition A. (10) & A. (11) Effluent Limitations and Monitoring Requirements for the FGD -
footnote 3 was corrected to read December 31, 2023.
• Turbidity sampling was eliminated from internal outfall 002. Turbidity monitoring is included
at outfall 003.
• Supplement to cover sheet was modified to include flows that were not listed and add
proposed outfalls and outfalls.
• Condition A. (6) Effluent Limitations and Monitoring Requirements outfall 006:
o Oil and Grease limits were added since it receives truck wash waters.
o The RPA was revised and limits for total selenium were added.
• Condition A. (4) Effluent Limitations and Monitoring Requirements for outfall 003:
o Footnote 4 was modified to include a statement regarding the addition of temperature
limits if the facility is not in compliance with the temperature water quality standard.
o Reporting of the temperature at the afterbay station was added to the monitoring
requirements for outfall 003, reporting of temperature at 4C, 41) was eliminated.
o The RPA was revised and limits for thallium were added.
• Condition A. (17)- temperature reporting requirements were modified.
14

NPDES PERMIT FACT SHEET
Page 15
Roxboro Steam Electric Plant
NPDES NO. NC00003425
• A. (8) Effluent Limitations and Monitoring Requirements for outfall 008 - monitoring
requirements were modified to require quarterly monitoring for one year after the new plant
start operations, annual monitoring is required after one year of quarterly monitoring.
• Two new internal outfalls (Outfall 012A and 012B) were added to the permit for the two
proposed retention basins for the treatment of low volume wastes that are now sent to the ash
basin. Duke will build two separate wastewater treatment systems to handle the wastes that go
to the ash pond. These ponds will be in different locations in the site and will require each a
separate outfall into the effluent channel.
• Outfall 012C was added to the permit for the emergency overflow of the proposed lined
retention basin discharging through outfall 012B.
• A table including a list of all the seeps locations was added to Condition A. (14).
Modifications to January 2017 draft permit:
• Seeps special condition was eliminated. Seeps will be addresses through Special Order by
Consent EMC SOC WQ 518-005.
• The groundwater monitoring well construction and sampling condition was eliminated from the
permit.
• A footnote was added to outfalls 001 and 003 that requires that the discharge from the
decanting/dewatering operations is discontinued if any of the identified pollutants reaches 85%
of the allowable concentrations.
• Requirements for Outfall 001 were modified. The outfall location was established at the OF to
Hyco Lake. Monitoring was increased to weekly during the removal of the asKfrom the east ash
basin extension.
• RPA for outfall 003 was revised using updated thallium criteria. As a result of the RPA no limit
for thallium is necessary.
• Monitoring frequency for arsenic, selenium and mercury at outfall 003 was increased to weekly
during dewatering.
• The note for outfall 002 that contained the requirement to use physical -chemical treatment during
decanting and dewatering was modified. The installation of physical/chemical treatment is not
required unless necessary to meet the water quality standards.
• Outfall 006 requirements were modified to reflect the nature of the discharge. This pond
discharge is episodic, it only discharges if there is a heavy rain event, therefore limits were
implemented as daily maximums.
• pH limits were eliminated from internal outfalls.
• The flow page for 0.15 MGD for the domestic treatment system (outfatl 008) was eliminated since
the W WTP was upgraded to 0.25 MGD.
• Monitoring for arsenic, mercury, antimony, copper, molybdenum and selenium were added to
Outfall 012A due to the contribution from ash basin closure flows and treated groundwater.
• The schedule of compliance to meet FGD ELG limits was modified to December 31, 2021.
• The Groundwater Monitoring Well Construction and Sampling condition was eliminated.
• Special condition A. (28) Compliance Boundary was added to the permit. Groundwater
compliance boundary maps were added to the permit as Attachment A and B. Attachment A
describes the current compliance boundary and Attachment B describes the compliance
boundary once the ash is removed from the East Ash Basin Extension.
• Special condition for instream sampling was modified to require monthly sampling, to add
sulfides to the list of monitored parameters and to specify the sampling location.
• Fish tissue monitoring special condition was modified to clarify requirements.
• For clarification the identification of outfall 003 was modified to heated water discharge pond.
• The special condition for 316(b) requirements was modified to include a schedule to submit the
required information in 122.21(r) by May 31, 2022.
15

NPDES PERMIT FACT SHEET
Page 16
Public Notice schedule:
Draft permit to Public Notice:
Permit Scheduled to issue:
Roxboro Steam Electric Plant
NPDES NO.NCO0003425
STATE CONTACT
If you have any questions on any of the above information or on the attached permit, please contact -
Sergei Chemikov at [phone].
16

ROY COOPER
Govern
WCHAEL S. REGAN
Secretary
UNDA CULPEPPER
Director
January 27, 2020
Tom Copolo
Duke Energy Progress
10660 Boston Road
Roxboro. North Carolina 27574
NORTH CAROLINA
Enviranotenial Quality
Response: Review of Duke Energy Progress, Roxboro Steam Electric Plant
(NC0003425): Environmental Monitoring Report (2017-2018).
Dear Mr. Copolo: prtOY7 a o41
Thank you for your submission of the 2017-2018 Environmental Monitoring Report for
this facility. Based on a review of the information submitted, we find no major concerns
associated with the Limnological data. Similarly, in terms of the fisheries, we find that
the data submitted support the broad guidelines of a Balanced and Indigenous
Population. In addition, as it pertains to the fish tissue data, we note that trace elements
in fish tissues rnntinue to show spatial patterns that align with plant operations and are,
overall, showing minimal or declining trends in Hyco Reservoir (especially for selenium).
However, in future reports, please make the following amendments to the current
format:
1) When making comparisons to North Carolina fish tissue criteria, please
use current NC DPH fish tissue screening levels for TE comparisons,
rather than their outdated fish consumption advisory levels. DHHS no
longer uses "advisory" levels for TE comparisons when performing fish -
based risk assessments. This document is appended for your
convenience.
2) The Map (Figure 1) on Page 5 appears to be an older version and does
not match up with the text in the report. Please address this discrepancy.
3) In the future, please include a historical (10-year record) graphical data
set for the fish community data. This would make for significantly quicker
review of the data for BIP determinations.
North Carolina Department of Environmental Quality I Division of water Resources
512 North Salisbury Street 11634 Mail Seryfce Center I Raleigh. North Carolina 276991634
919.7079000

If you have any questions or comments regarding this matter, please do not hesitate to
contact me.
Sincerely,
Cyndi Karoly
Chief, Water Sciences Section
Cc: Rick Bolich, Raleigh Regional Office
Julie Grzyb, Complex Permitting Unit
Kennedy Holt, NC DHHS
Linda Hickock, Duke Energy

Manuel, Vanessa
From: Martin, Sharon L.
Sent: Thursday, January 2, 2020 10:11 AM
To: DEQ.AI I
Subject: DEQ secures the nation's largest coal ash excavation of nearly 80 million tons of coal
ash
Roy Cooper, Governor D.EO!'
DeW,t vM of rm,rimmorltal CWIICy
ease: IMMEDIATE
e: January 2, 2020
Contact: Sharon Martin
Phone:[phone]
Michael S. Regan, Secretan
DEQ secures the nation's largest coal ash excavation of nearly 80 million tons of coal ash
LEIGH — The North Carolina Department of Environmental Quality (DEQ) has secured the excavation of nearly 80 million tons of coal
ix facilities in North Carolina. Under a settlement agreement with community and environmental groups and Duke Energy that ends the
eal litigation, Duke Energy will move forward with excavation plans at the Allen, Belews Creek, Cliffside, Marshall, Mayo ands
s, moving coal ash into on -site lined landfills.
: excavation is the largest coal ash clean up in the nation's history and will result in more excavation than in four neighboring states
rbined.
orth Carolina's communities have lived with the threat of coal ash pollution for too long. They can now be certain that the clean-up of th
coal ash impoundments in our state will begin this year," said DEQ Secretary Michael S. Regan. "We are holding Duke accountable and
I continue to hold them accountable for their actions as we protect public health, the environment and our natural resources."
ter the signed agreement, Duke will be required to excavate more than 76 million tons of coal ash from open, unlined impoundments at tl
facilities. More than 3 million tons of non -impoundment coal ash will also be excavated. Two facilities, Roxboro and Marshall, will be
ject to additional protective measures for specific sections of impoundments that will remain under existing permitted landfills or structur
:. Protective measures will include stabilization requirements, and surface water and groundwater monitoring and any necessary
iedgation.
agreement also requires Duke to enter into a court -supervised consent order with DEQ and the groups represented by Southern
,ironmental Law Center.
tis agreement is a historic cleanup of coal ash pollution in North Carolina, and the Department of Environmental Quality and community
ups throughout the state have provided essential leadership in obtaining it," said Frank Holleman, senior attorney at the Southern
dronmental Law Center which represents community groups in court seeking coal ash cleanups in North Carolina. "The water resources
families of North Carolina will benefit from this statewide coal ash cleanup for years to come."
ce has submitted closure plans for the excavations by the December 31, 2019 deadline, as required by the Coal Ash Management Act
tMA) of 2016 and in accordance with the agreement. The public will have an opportunity to comment on the closure plans during a

tment period and at public hearings near each of ix sites in February. Under CAMA, DEQ's tmal action on the closure plans is due
iin 120 days of receipt of the complete closure plans. Within 60 days of approval, implementation of the plans must begin.
more information and to read the agreement and closure plans: hugs://deq.nc.pov/coalashexcavation
Website: ,NiNxv.deq.nc.cox
Facebook: ivwvuw.facebookconincdeo
Twitter: wvvrxhvitter.comNCDEQ
1601 Mail Sen-ice Center, Raleigh, IBC 27699-1601
If you vould rather not receive future communications from North Carolina Department of Environmental Quality, let us know by clicking here.
North Carolina Department of Environmental Quality, 217 W. Jones St., Raleigh, NC 27699 United States

Manuel, Vanessa
From:
Sent:
To:
Subject:
fyi
Bolich, Rick
Thursday, December 5, 2019 3:17 PM
Vinson, Scott; Manuel, Vanessa
FW: Duke Startup of Roxboro FGD System
Rick Bolich, L.G.
Chief, Ground Water Resources Section
NCDEQ Division of Water Resources
1636 Mail Service Center
Raleigh, NC 27699-1636
919-707-3671
From: Poupart, Jeff
XCoo03°F2.{5,
Sent: Thursday, December 5, 2019 3:14 PM
To: Langley, Shannon <[e-mail]>
Cc: Chernikov, Sergei <[e-mail]>; Bolich, Rick <[e-mail]>; Sledge, Bob
<[e-mail]>
Subject: Duke Startup of Roxboro FGD System
We concur with the commissioning and startup of the new Flue Gas Desulfurization (FGD) wastewater treatment system
at the Roxboro Steam Electric Plant NPDES permit NC0003425 as described in your November 6 letter to Sheila
Holman. This concurrence is based on the startup occurring under the existing expired and administratively continued
permit. Sampling for the new FGD system will be associated with Internal Outfall 010 with ultimate discharge through
Outfall 003. The new FGD system will be incorporated into the permit renewal currently being drafted. Please let me
know if you have any questions or clarifications.
Jeff Poupart
Section Chief Water Quality Permitting Section
NC Division of Water Resources
919-707-3600
E-mails to and from this address are subject to release under NC Records Act

(' DUKE
ENERGY.,
November 6, 2019
Ms. Sheila Holman
Assistant Secretary
NC Department of Environmental Quality
217 West Jones Street
Raleigh, NC 27603
Paul Dreovitch, P.E.
Senior Vice President
NC Dept ofEnvironmental Quality
Environmental, Health & Safety
and Operations Support
58 S. Church Street
NUV - 7 2019
Mail Code., 3XP
Charlotte, NC 28202
[phone]
Raleigh Regional Office
Subject: Startup of new FGD treatment components
Internal process flow modifications
Roxboro Steam Electric Plant
NC0003425
Person County
Dear Assistant Secretary Holman,
This letter is to provide details and notice about the planned startup of required treatment
components at the subject facility. Duke Energy has constructed a new wastewater system to
replace the existing system used to treat flue gas desulfurization (FGD) wastewater since 2008.
Details of this new system were shared with the Department in an application submittal dated
August 15, 2016. That submittal is enclosed with this letter for ease of reference. Much of the
existing system sits within the footprint of the west ash basin which will be closed resulting in
the need for the new system.
Duke Energy intends to commence commissioning activities for the new FGD wastewater
system and place it into service after concurrence from your agency. Commissioning is expected
to take between 6-8 weeks with tuning of the system taking up to 6 months to reach optimum
treatment efficiencies of the biological system. As indicated in the 2016 submittal, flows from
the new FGD wastewater treatment system will be directed to the lined retention basin for
commingling with other wastewater sources and then to outfall 003, the same discharge point
where current flows are directed. The internal flow path from the lined retention basin is
currently in use as approved by the Department earlier this year.
As described in the 2016 submittal, there will be a period where flows from both the old and new
FGD wastewater treatment system occur as the old system processes remaining flow in the FGD
settling basin until that system is closed. Duke Energy will continue to properly operate the old
system and will sample as required while that system continues to function.
www.dukc<nergy.com

Ms. Sheila Holman
Roxboro FGD startup concurrence request
November 6, 2019
Duke will sample the new FGD treatment system in accordance with the existing permit
requirements associated with outfall 010. These sample results will be reported as an attachment
to our monthly required NPDES Discharge monitoring report much like our lined retention basin
samples are currently reported.
Duke Energy hereby requests your concurrence with this action with the understanding
that this action is being taken under the conditions of the existing permit and is not
intended in any way to be binding on the future permitting decisions or terms currently
under review by the Department.
If there are any questions about this matter please contact Mr. Shannon Langley at (919) 546-
2439 or [e-mail].
Since y,
Paul Draovitch
Senior Vice President,
Environmental, Health & Safety and Operations Support
Duke Energy
Enclosure
cc: RRO DEQ WQ Supervisor w/enclosure
3800 Barrett Drive
Raleigh, NC 27609
Jeff Poupart — DWQ Section Chief w/enclosure
1617 Mail Service Center
Raleigh, NC 27699-1617
Lori Tollie - via email
Shannon Langley — via email

DUKE
ENERGY®
August 15, 2016
NC Dept of Environmental Qnality
NOV - 7 2nI9
f
i Raleigh Regional Office
Ms. Teresa Rodriquez
North Carolina Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: NPDES Wastewater Permit Application Submittal #8
Duke Energy Progress, LLC.
Roxboro Steam Electric Plant
Permit #: NC0003425
Person County
Dear Ms. Rodriquez,
Harry K. Sidens
Senior Vice President
Environmental, Health & Safety
526 S. Church Street
Mail Code: ECUP
Charlotte, NC 28202
(704) 3824303
Duke Energy Progress, LLC (Duke) is submitting herewith three copies of supplemental
information in support of the NPDES renewal application submitted in September 2011 for the
subject facility. This update is in addition to the previous updates and requests submitted dated
July 27, 2011, March 31, 2012, October 15, 2014, December 17, 2014, July 22, 2015 and July 5,
2016. Please include this supplemental information and the information in the previous
submittals in your review.
This submittal is intended to provide an update of modifications that will be necessary to comply
with recently enacted laws and regulations including the Federal Steam Electric Effluent
Guidelines (ELG), Federal Coal Combustion Residual (CCR) rule, the North Carolina Coal ash
Management Act of 2014 and HB 630 of 2016. Specific permit requests from Duke Energy are
identified in bold throughout this submittal.
With numerous federal and state requirements to coordinate and implement in a short time for
the site, planning and sequencing of work are paramount and dynamic. As such, final scope and
sequence for all work is not complete at this time. Where scope is still not finalized, Duke has
provided a range of options that are being evaluated and provided various alternate scenarios in
an attempt to limit the number of subsequent submittals necessary. As there are no requests for
previously unpermitted external outfalis to waters of the United States and all proposed
modifications contained herein are internal to our wastewater process flows, it is Duke's belief
that the information provided in this submittal is of sufficient detail to allow for review and
issuance or renewed NPDES permit for the Roxboro Steam plant. This is consistent with the
guidance received from DEQ staff in a meeting on November 20, 2015 and follow up
correspondence dated January 11, 2016 and January 28, 2016.

Roxboro Steam Plant NPDES application update #8
NC0003425
Person County
Page 2 of38
1. Duke requests a new internal outfall to be associated with a retention basin for
treatment of low volume waste. North Carolina's Coal Ash Management Act and the
Federal CCR rule will prohibit continued wastewater flows to the existing ash basin at
Roxboro. Projects are underway to convert ash handling of all ash (both bottom ash and
fly ash) to 100% dry handling and disposal systems. All other wastewater inputs to the
current ash basin must be redirected and handled in another manner. Duke intends to
construct a lined, retention basin to handle all flows currently directed to the active ash
basin with the following exceptions: Storm water runoff from the landfill on the east side
of Dunaway road that currently flows to the ash basin will be relocated (discussed
below). Cooling Tower blowdown in cases where blowdown flows exceed 500 gpm will
be relocated (discussed below). Additionally, the retention basin will consist of two
basins: a primary and a secondary basin. The primary basin is where the majority of
solids settling will occur, while the secondary basin provides adequate retention time for
settling of fine particles. The primary basin will also have a location to allow various
vacuumed sediments and solids to be decanted prior to disposal of materials into the
onsite landfill. Periodically, any accumulated solids in the retention basin will be
disposed of in the facility's onsite landfill. The retention basin will be approximately l l
acres in area and have the capability to have additional of flocculent and pH adjustment
chemicals. The primary basin will be designed for continuous flow through it.
A holding basin will be constructed for high volume flows such as air heater washes,
process washes, etc. The holding basin will have a chemical feed system for adjusting
pH and polymer addition to enhance settling. Once acceptable, the holding basin
contents will be transferred to the primary basin in the retention basin. The holding basin
will be designed for batch processing and will be approximately 6.6 Acres in area.
The requested internal outfall from the newly constructed retention basin will discharge
into the heated water mixing zone upstream of outfall 003 and ultimately flow to Hyco
reservoir thorough outfall 003 as is currently authorized by the subject permit. An aerial
photo with potential locations being evaluated for the new retention basin can be found in
Attachment I.
Duke is evaluating the addition of a second retention basin southeast of the generation
nits to be used to treat flows from silo wash water, stormwater runoff, landfill leachate
and runoff from the gypsum pad area. Flows from this basin would enter the heated
water effluent channel east of the generation units upstream of NPDES outfall 003.
Duke requests an internal outfall be added to the permit for this basin.

Roxboro Steam Plant NPDES application update #8
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Page 3 of 38
2. Duke requests that a new internal outfall for modified FGD wastewater treatment
system be added to the permit. To comply with Federal ELG guidelines for FGD
wastewater, a new treatment system for FGD wastewater will be constructed and utilized.
This system will consist of physical/chemical treatment units, a new Bioreactor and
ultrafiltration system. Solids settled and collected in the physical/chemical system will
be handled via a series of filter presses and disposed of in the facility's onsite landfill.
Duke intends to process legacy FGD wastewater through existing permitted outfall 010
until the treatment units associated with that outfall are decommissioned and closed. The
requested new internal outfall for FGD wastewater and outfall 010 will need to both be
operational for a period of time. The new internal outfall will be directed to the retention
basin described in item #1 of this letter. If the new FGD treatment system must be in
service before the retention basin is constructed, treated wastewater from the FGD
internal outfall will be directed to the heated water mixing zone upstream of NPDES
outfall 003 until the retention basin is completed. For reference, this is the point at which
current flows are released to Hyco Reservoir. The location of the new FGD wastewater
treatment system is identified in Attachment 1.
3. Duke intends to install heat exchangers or small auxiliary cooling tower for influent
flows to the new FGD wastewater treatment system. Duke requests that this flow be
listed as a contributing flow to outfall 003. Water will be withdrawn from within the
process heated water mixing zone, used to cool FGD blowdown prior to treatment in the
biological system and returned to the heated water mixing zone upstream of NPDES
outfall 003. The heat exchangers or small cooling tower will be utilized to assure process
water remains below bioreactor operational temperature requirements, which can
potentially present an operational concern during the summer months. This addition is
intended to assure efficient operation of the FGD blowdown treatment system.
4. Duke is installing a new domestic package plant for plant sanitary waste. Duke
intends to replace the current domestic package plant with a new above ground package
plant. The new domestic package plant will have a capacity of 0.025 MGD. With this
modification, Duke requests the flow limit of 0.015 MGD associated with the existing
plants design capacity be removed from outfall 008 or modified to 0.025 MGD to
reflect the new plant's capacity. Treated flows from the new plant will be directed to
the ash basin until such time that the retention basin described in item #1 is complete.
Upon completion of the retention basin, treated domestic flows will be sent to the
retention basin and flow to outfall 003 as they currently do. A narrative description and

Roxboro Steam Plant NPDES application update #8
NC0003425
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Page 4 of 38
specification sheet for the new domestic package plant is provided in Attachment 2 with
this submittal for your files.
5. Duke requests modification of the terms related to internal outfall 005 (Unit # 4
cooling tower blowdown). Currently, a slip stream of blowdown from the Unit 4
cooling tower is used to sluice ash and is directed to the ash basin. With modifications to
the plant to handle ash in a completely dry form and future prohibition on sending
wastewaters to the ash basin, Duke is requesting outfall 005 be permitted to be released
directly to the heated water mixing zone or to the retention basin described in item #1
above (based on Duke's future determination) as both of these flows paths are upstream
of NPDES outfall 003. Duke requests modification of NPDES permit condition A.
(14) to facilitate this change.
6. Duke intends to install a vapor suppression system in 2016 at the anhydrous
ammonia tanks to be used in the case of an emergency due to a release of anhydrous
ammonia. This modification is intended to enhance the safety of our employees and
local residents should there be an unintended release of anhydrous ammonia from the
facility's tanks. This system will use raw lake water from Hyco reservoir. The system
will be tested periodically with flows from tests (consisting of raw, untreated lake water)
entering the heated water mixing canal just to the west of the unit #4 cooling tower. In
the event of an actual emergency operation of the system due to a release of anhydrous
ammonia, flows from the vapor suppression system will follow this same flow path and
will potentially contain significant concentrations of ammonia. Upon completion of the
retention basin, test flows and emergency operation flows will be directed to the retention
basin described in item #1 of this letter. Flow rates for tests and emergency operation of
the vapor suppression system are anticipated to be approximately 1882 gallons per
minute. Duke requests concurrence in the permit that any impacts associated with
the emergency operation of this system do not constitute a violation of the permit.
Duke requests this flow be added to the list of flows tributary to outf d! 003 and,
upon completion, the new retention basin described in item #1 of this submittal.
7. Landfill leachate is currently sent to the west ash basin. Landfill leachate flows will be
directed to one of the retention basins (both upstream of outfall 003) described in item #
1 upon completion of that basin. Duke requests that ELG permit limits associated
with landfill leachate be applied after the treatment provided in the retention basin
described in item #1 of this submittal.

Roxboro Steam Plant NPDES application update #8
NC0003425
Person County
Page 5 of 38
8. Duke requests specific authorization within the reissued permit that upon ceasing
flows to the west ash basin, decanting and dewatering of the basin through existing
internal outfa11002 can occur. Specific authorization for decanting and dewatering is a
condition currently in the NPDES permit at Sutton and Marshall. Duke requests specific
authorization that the ash basin may be decanted and dewatered and what the permit
limits associated with that activity are. A characterization of the ash basin interstitial
water has been previously provided. This submittal was dated July 22, 2015. Decanting
and dewatering will occur through NPDES internal outfall 002 and will ultimately flow
to Hyco reservoir through NPDES outfall 003.
9. Duke requests the re-insertion of NPDES outfall 001 in the NPDES permit. This
outfall was removed from the NPDES outfall by the Department in 1994. There have
been no modifications to the flow since that time however, the flow originates at the
retired east ash basin remnant area and contains flow from several areas recently
identified as AOW's. Specifically, S-9, S-10, S-11, S-12 and S-13 flow to the point of S-
13 which is the former outfall 001 in the NPDES permit. Chemical characterization of
this water was provided recently and was identified as S-13. If a full characterization of
the water is required, Duke request that this be made a condition of the permit and be
submitted 6 months after the permit effective date. Flows at this point consist of
stormwater through the remaining area of the retired east ash basin, the AOW's identified
above and other stormwater flows not associated with industrial activity.
10. Modifications associated with the coal pile runoff pond (NPDES outfall 006). Duke
is constructing an emergency gypsum stack out area on the west side of the plant near the
existing limestone ball mill and FGD filter press building. The emergency stack out area
is not expected to be used routinely and is being constructed to comply with Federal CCR
requirements. The area is approximately 0.3 acres in size. Runoff from the emergency
gypsum stack out and surrounding area including a lay down yard, truck wash facility
and gypsum conveyor system will flow to the coal pile runoff pond and to Hyco reservoir
after treatment through NPDES permitted outfall 006. Additionally, there is a need to
periodically drain a raw lake water tank located in the area of the coal pile runoff pond
for routine maintenance. As part of routine maintenance, this raw lake water tank may be
allowed to drain to the coal pile runoff pond. The tank can hold up to 50,000 gallons of
water.
11. Landfill storm water flows. As discussed above, storm water flows from the existing
landfill must be rerouted in order to comply with CAMA 2014 and the Federal CCR rule.
Landfill storm water flows consists of runoff from approximately 250 acres of landfill

Roxboro Steam Plant NPDES application update #8
NC0003425
Person County
Page 6 of 38
and surrounding, up gradient area. Currently, storm water flows from the landfill flow
into the west ash basin for treatment prior to being released through NPDES outfall 003.
Currently three options are being considered for re-routing stormwater flows. An aerial
photo depicting these options is included with this submittal in Attachment 3
a. Option 1: Duke is evaluating the feasibility of constructing a stormwater
retention pond in the area just west of Dunaway road between Dunaway and
the active ash basin. Flow from this storm water retention pond would enter the
once through cooling water discharge canal and flow to Hyco Reservoir through
NPDES permitted outfall 003. Duke requests review and concurrence that this
modification is acceptable.
b. Option 2: Flows may be directed into the once through cooling water discharge
canal just to the north of the retired ash basin dam. The flow would then travel to
Hyco Reservoir through the heated water mixing zone and NPDES permitted
outfall 003 as it currently does. This will require permitting through NC DEQ
Dam Safety program. Duke requests review and concurrence that this
modification is acceptable.
c. Option 3: Duke is evaluating the feasibility of routing stormwater flows to the
plant's intake canal through the former NPDES outfall 001 discharge channel.
Outfall 001 was removed from the NPDES permit in 1994 due to the retirement of
the east ash basin. Duke has identified this discharge point into the intake canal
as a seep and the discharge location and sampling data is referenced as "5-13" in
previous submittals.
Duke believes that Option 1 and Option 2 above can be accomplished without permit
modification. Duke requests concurrence of this understanding. Duke believes that
if the flow identified as "5-13" in previous submittals is permitted as a seep to the intake
canal, or is reinserted into the permit as outfall 001, then Option 3 above can be
undertaken without additional permitting. If coverage for "5-13" is not necessary, it is
Duke understands that option 3 could be undertaken but may require industrial
stormwater coverage under NPDES General Permit NCG12000. An aerial photo
showing the route and location for each of these options is included in Attachment 3.
Duke requests concurrence of this understanding.
12. Ongoing Landfdl/Basin closure groundwater dewatering — Development of future
cells of the landfill and/or basin closure will require the lowering of groundwater levels in
and around the retired ash basin to meet separation and stability requirements for the
landfill. Duke intends to install a dewatering system and route extracted groundwater to

Roxboro Steam Plant NPDES application update #8
NC0003425
Person County
Page 7 of 38
outfall 003 and/or the re -permitted outfall 001 after treatment. Duke requests this flow
be listed as a contributing flow to outfall 001 and outfall 003.
13. Steam Electric Effluent Guidelines Alternate schedule justification. Duke requests
an alternate applicability date for the Steam Electric Effluent Guidelines in
accordance with the request found in Attachment 4.
As the Steam Electric Effluent Guidelines makes clear, BAT limits may apply - depending
on the individual circumstances of the facilities subject to the rule - any time within the
window of November 1, 2018 to December 31, 2023. In selecting an appropriate
applicability date for each waste stream subject to the new BAT limits, the permitting
authority is called upon to determine an "as soon as possible" date when supplied with
appropriate information by the permittee. Attachment 4 provides the appropriate information
justifying the following applicability dates:
— Bottom Ash Transport Water: To convert the wet bottom ash transport system at
Roxboro to a closed loop system, Duke plans to install a remote mechanical drag
chain system (RMDS). Duke would like to request April 30, 2021 as the
applicability date for the zero discharge of bottom ash transport water, assuming a
permit effective date of October 1, 2016.
— FGD wastewater: Duke is planning on conducting several evaluations to
determine whether the FGD wastewater flow can be reduced, and the existing
bioreactor can be utilized in addition to evaluating viable selenium reduction
technologies. These evaluations will allow Duke to select the most cost effective
FGD wastewater system for Roxboro. In addition, it has recently come to Duke's
attention GE is claiming intellectual property rights on the biological treatment
system for FGD wastewater, thus, making GE the sole provider of EPA's model
technology. With these evaluations in process and the uncertainty of GE's
intellectual property claim, Duke would like to request December 31, 2023 as the
applicability date for the BAT limits for FGD wastewater, assuming a permit
effective date of October 1, 2016.
— Fly Ash Transport Water: Fly ash is handled dry during normal operation;
therefore, Duke is not requesting an applicability date for the zero discharge of fly
ash transport water beyond November 1, 2018.
14. CWA Section 316(b) alternate schedule. Duke requests an alternate schedule for
compliance with Section 316(b) of the Clean Water Act. Specifics of the request can
be found in Attachment 5.

Roxboro Steam Plant NPDES application update #8
NC0003425
Person County
Page 8 of 38
15. Area of wetness (AOW) disposition.
Duke has previously identified a number of Areas of Wetness within the property.
All of these AOW's are upstream of permitted outfalls. Consequently, Duke
requests that there be no sampling required for the AOW's. These de minimus AOW
flows are part of existing processes and are sampled through NPDES outfalls. Duke
requests that the AOW's be listed as contributing flows the respective outfall in
either the NPDES permit of NPDES permit fact sheet as follows: AOW's that are
contributing flows to NPDES outfall 003 are: SI, S2, S3, S4, S5, S6, S7, S8, S14, S18
and S l9. AOW's that are contributing flows to requested NPDES outfall 001 are: S9,
510, Sl 1, S12 and S13. Duke requests that any future AOW's that are identified and
are tributary to these permitted outfalls not require notification to DEQ.
16. Duke has included an updated water process flow chart with this submittal that
shows the water flow path for the site after the ash basin is no longer used. This can
be found in Attachment 6. The only substantive change in flow volumes will be the
removal of ash sluice flows. This volume is negligible at outfafl 003.
We appreciate your attention to these requests and look forward to finalizing the NPDES permit
for the Roxboro Steam Electric plant in the near future. Should you have any questions
regarding this letter or require additional information, please contact Mr. Shannon Langley at
[phone] or at [e-mail].
"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 qual fled personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility offines and imprisonment for knowing violations. "
Sincerely,
Harry Sideris
SVP - Environmental, Health & Safety
Enclosures

Roxboro Steam Plant NPDES application update #8
NC0003425
Person County
Page 9 of 38
NCDEQ cc: Sergei Chemikov
Duke Energy cc: William J. Thacker, Shannon Langley, Robert Howard, Rob Miller, Danny Satterwhite

Attachment 1
Proposed retention basin location
August 15, 2016 NPDES application update
Roxboro Steam Plant
NC0003425

Attachment 2
Domestic package plant narrative description and
specification sheet
August 15, 2016 NPDES application update
Roxboro Steam Plant
NC0003425

Roxboro Steam Electric Plant Domestic package
plant improvements
Sanitary wastewater at Roxboro station is currently treated in an in ground package wastewater
treatment system which is more than 20 years old. A new package plant is being installed to
replace the existing package plant on an in -kind basis.
The new package plant will be installed above grade on a concrete foundation. The plant will
have an average capacity of 15,000 gallons per day with a peak capacity of 25,000 gallons per
day. The process will consist of an influent comminutor, influent equalization, extended
aeration, secondary clarification, disinfection, and effluent pumping.
Wastewater will be pumped from the equalization tank to the aeration tank through a flow
control weir box, which will maintain a constant forward flow rate as long as there is wastewater
in the equalization tank. The package plant will arrive with course bubble aeration diffusers
pre -installed. Air to the process will be supplied by a connection to the plant air
system. Aeration piping will include a filter and pressure reducing valves to condition the air
supplied to two zones: zone 1 includes the equalization tank and the waste sludge tank, and zone
2 includes the aeration tank itself. Mixed liquor from the extended aeration process will flow by
gravity to the secondary clarifier.
Biomass settled in the clarifier will be pumped via air lift pump back to the aeration tank as RAS
or to the waste sludge tank as WAS, where sludge will be accumulated prior to disposal off -
site. Clarified effluent will leave the clarifier by a series of v-notch weirs and flow to the
chlorination chamber for disinfection. A two -tube tablet chlorinator will be installed in the
chlorination chamber to provide chlorine for disinfection.
Treated effluent will be pumped to the Unit 3-4 sump via the existing effluent pipeline for the
existing package plant. Flows from the Unit 3-4 sump are currently directed to the ash basin.
Upon completion of the retention basin, flows from the package plant will be redirected to the
retention basin and ultimately to Hyco Reservoir through NPDES outfall 003. The package plant
will be insulated to help prevent freezing.

Attachment 3
Landfill Stormwater flow options aerial photo
August 15, 2016 NPDES application update
Roxboro Steam Plant
NC0003425

Roxboro Plant landfill stormwater redirection options T
I•10
Site Overview
1
vN iv n�
(To outfall 003)

Attachment 4
Steam Electric Effluent Guidelines Alternate
Schedule justification
August 15, 2016 NPDES application update
Roxboro Steam Plant
NC0003425

Roxboro Electric Generating Plant: Effluent Guidelines Rule
Justification for Applicability Dates
A. Introduction
Duke Energy (Duke) is working diligently to develop and refine an optimized schedule for the
installation and upgrades to wastewater treatment systems to comply with the Steam Electric Power
Generating Effluent Limitation Guidelines (ELG) at seven coal-fired stations in North Carolina. Duke
submits the following information as a justification for appropriate applicability dates for compliance
with the new Effluent Guidelines Rule (ELG Rule) (80 Fed. Reg. 67,838 (Nov. 3, 2015)) at Roxboro
Electric Generating Plant (Roxboro), located near Roxboro, North Carolina.
Roxboro consists of four coal fired generating units with nameplate generating capacities of 410.8,
657, 745.2, and 745.2 MWe for Units 1, 2, 3, and 4 respectively. The station currently discharges
treated bottom ash transport water, and FGD wastewater. Under normal plant operations, fly ash is
collected dry and either disposed in a permitted on -site landfill or transported offsite for beneficial
reuse. If the dry fly ash collection system is not operating, the fly ash is sluiced to the ash basin in
which the transport water is treated in the ash basin and subsequently discharged through outfall 002.
Bottom ash from the boilers is sluiced with transport water to the west ash pond. The transport water
is treated by the ash pond system and is discharged through outfall 002. The FGD blowdown is
discharges to a gypsum settling pond were suspend solids are settled out prior to flowing to the
bioreactor. The bioreactor effluent is discharged to the effluent channel through outfall 010 prior to
outfall 002.
The ELG Rule sets a range of possible applicability dates for compliance with the new BAT limits for
bottom ash transport water (zero discharge) and FGD wastewater (numeric limits for selenium,
arsenic, mercury, and nitratetnitrite), as well for fly ash transport water (zero discharge). The
regulation provides that all permits issued after the effective date of the rule (January 4, 2016) should
contain applicability dates for compliance with the BAT limits, and that those dates should be "as
soon as possible" but not sooner than November 1, 2018 and not later than December 31, 2023.
For Roxboro, since the plant's final NPDES permit will be issued after January 4, 2016, but before
November 1, 2018, EPA specifically instructs permit writers to "apply limitations based on the
previously promulgated BPT limitations or the plant's other applicable permit limitations until at
least November 1, 2018." 80 Fed. Reg. at 67,883, col. 1 (emphasis added). As the rule makes clear,
however, BAT limits may apply — depending on the individual circumstances of the facilities subject
to the rule — any time within the window of November 1, 2018 to December 31, 2023. In selecting an
appropriate applicability date for each waste stream subject to the new BAT limits, the permitting
authority is called upon to determine an "as soon as possible" date.

The ELG Rule provides a very specific definition for "as soon as possible." The permit writer — when
supplied with appropriate information by the permittee — must consider a range of factors that affect
the timing of compliance. Those factors are as follows:
(1) Time to expeditiously plan (including to raise capital), design, procure, and install
equipment to comply with the requirements of this part.
(2) Changes being made or planned at the plant in response to:
(i) New source performance standards for greenhouse gases from new fossil fuel -
fired electric generating units, under sections 111, 301, 302, and 307(d)(1)(C) of the
Clean Air Act, as amended, 42 U.S.C. 7411, 7601, 7602, 7607(dXIXC);
(ii) Emission guidelines for greenhouse gases from existing fossil fuel -fired electric
generating units, under sections 111, 301, 302, and 307(d) of the Clean Air Act, as
amended, 42 U.S.C. 7411, 7601, 7602, 7607(d); or
(ui) Regulations that address the disposal of coal combustion residuals as solid waste,
under sections 1006(b), 1008(a), 2002(a), 3001, 4004, and 4005(a) of the Solid Waste
Disposal Act of 1970, as amended by the Resource Conservation and Recovery Act
of 1976, as amended by the Hazardous and Solid Waste Amendments of 1984,42
U.S.C. 6906(b), 6907(a), 6912(a), 6944, and 6945(a).
(3) For FGD wastewater requirements only, an initial commissioning period for the
treatment system to optimize the installed equipment.
(4) Other factors as appropriate.
40 C.F.R. § 423.11(t).
The wastewater treatment systems at Roxboro will undergo significant modifications and in most
cases complete replacement to comply with the revisions to the ELG Rule. Duke would like sufficient
time to select, design and install the most cost effective technology at Roxboro to comply with the
ELG limits and reduce the burden to the ratepayers. We have prepared a preliminary timeline for
planning, designing, procuring, constructing and optimizing the technology once it is selected, for
each applicable waste stream. Based on our preliminary analysis, we request the following
applicability dates:
— Bottom Ash Transport Water: To convert the wet bottom ash transport system at Roxboro to
a closed loop system, Duke plans to install a remote mechanical drag chain system (RMDS).
Duke would like to request April 30, 2021 as the applicability date for the no discharge of
bottom ash transport water, assuming a permit effective date of October 1, 2016. Duke
anticipates that equipment will be installed by December 31, 2019 to comply with the North
Carolina -Coal Ash Management Act (NC -LAMA) and the Coal Combustion Residual (CCR)
rule. These rules, however, only regulate the material, not the water. As discussed below,
Duke will need a 16 month window to optimize the system to operate as a zero discharge

system. This additional time is needed to account managing the installation and optimization
of four RMDS being installed in N. Carolina simultaneously. In addition, the extent and
complexity of the permits required are unknown at this time. Duke, therefore, allocated 6
months to account for potential permitting delays.
— FGD wastewater: Duke is reviewing options to determine whether the FGD wastewater
system at Roxboro will need to be completely replaced or if existing components can be
utilized. In addition, to construct a cost effective system, Duke is evaluating options to reduce
the FGD flow to the treatment system. Furthermore, it has come to Duke's attention the
availability of biological treatment systems may be limited due to intellectual property rights
be claimed by GE, which would limit the available vendor resources to supply the model
technology. At a minimum, we plan to evaluate the development of a new physical/chemical
system augmented by a selenium reduction system. To account for the multiple evaluations
needed and the limited vendor resources, Duke would like to request December, 31, 2023 as
the applicability date for the best available technology (BAT) limits for FGD wastewater.
— Fly Ash Transport Water: Fly ash is handled dry during normal operation; therefore, Duke is
not requesting an applicability date for the zero discharge of fly ash transport water beyond
November 1, 2018.
The following provides necessary information justifying the requested applicability dates provided
above.
B. Bottom Ash Transport Water
As stated above, significant portions of the bottom ash transport system at Roxboro will need to be
replaced to comply with the no discharge limit of bottom ash transport water (BATW). The rule
identified dry handling or closed -loop systems as the BAT technology basis for control of pollutants
in bottom ash transport water. Specifically, a mechanical drag system (MDS) was identified as the
technology basis for a dry handling system, where as a RMDS was identified as the technology basis
for a closed -loop system. Duke is planning on installing a RMDS at Roxboro to handle bottom ash
dry. The system will be designed to operate in a closed -loop mode to meet the zero discharge limits
for BATW. Duke anticipates 55 months from the effective date of the permit will be needed to
design, install and commission the RMDS as a zero discharge system based on the following
preliminary timeline. It is important to note Duke will be installing RMDS at four stations in N.
Carolina; therefore, additional time is needed compared to a single installation to account for
managing multiple projects simultaneously.
Remote Mechanical Drag System (RMDS)
Activity T Duration (Months)

Design'
8
• Siting
3
• Engineering
5
Procurement
12
Potential Permitting Delays
6
Construction/Tile-in
13
Optimization & Operational Experience
16
• Commissioning
2
• Start -Up
6
Total:
55
1) The design tasks has been initiated and Duke estimates an additional 8 months from the
permit effective (assuming Oct. 1, 2016) will be needed to complete the design.
2) Even though is it estimated that commissioning and start-up can occur in 8 months, Duke
anticipates needing a 16 month window to obtain the necessary operating time at full load
and account for commissioning / optimizing occurring at multiple facilities simultaneously.
Assuming a permit effective date of October 1, 2016, Duke estimates the system can be installed
and operated to comply with the zero discharge limit of BATW on or before April 30, 2021. To
design, procure, construct and optimize the RMDS at Roxboro to operate as a closed -loop system,
the following steps must be taken:
Design & Engineering
Duke has initiated the design phase, but, due to the simultaneous implementation of programs,
such as the CCR Rule and NC-CAMA across applicable sites in North Carolina, engineering and
technology resources are limited. Duke, therefore, estimates the design and engineering process will
take an additional 8 months from the permit effect date. Some of the activities within the water
balance and siting task will occur concurrently; however the design cannot be completed until the
siting task is completed. The permitting process, if necessary, will be initiated in the design and
engineering phase, but it is assumed permit receipt / approval will be conducted concurrently with
the design and procurement phase and will be completed prior to the construction phase. The
following tasks will need to be completed.
Water Balance
The first step in the design process of the RMDS is to develop a detailed water balance of the
current BATW. To operate the system as a zero discharge system, there is a balance between the

inputs of water into the system and the outputs of water through evaporation and bottom ash
removal. This is necessary to determine if any additional treatment of the BATW is needed to avoid
increase in fines and concentration of other constituents that could affect equipment operability.
In addition, several non-BATW waste streams are currently commingled and treated along with
BATW. The flow of these waste streams will be rerouted from the BATW system to a new
wastewater treatment system. This will require the streams to be characterized for both volumetric
flow and constituent make-up in order to size and design an appropriate treatment system. It is
important to note that not all waste streams discharge continuously or simultaneously. Some waste
streams discharge intermittently based on activity occurrence, such air preheater and precipitator
washes, while others may only discharge under certain rainfall events. In addition, many waste
streams do not discharge if the unit is not running. With most coal-fired units operating in an
infrequent mode, the opportunities to collect samples are limited and the operation schedule could
affect the schedule of this task.
Upon completion of the water balance, detailed engineering of the RMDS system and piping
reroutes of non-BATW can commence.
Siting
The RMDS will need to be sited appropriately to avoid any historical or current coal combustion
product disposal (CCP) sites and avoid construction areas that will be used to complete closure of
the ash basins at Roxboro. In addition, Duke will attempt to site the system to avoid waters of the
U.S. (WOTUS). However, based on the final siting of the system, WOTUS may not be avoided, and
permits from the U.S. Army Corps of Engineers may be required.
Permitting
If WOTUS cannot be avoided, then permitting from the U.S. Army Corps of Engineers (USAGE) will be
needed. At this time, it is unknown whether a USACE permit will be required or the type of permit
that may be required (nationwide permit (NPW) or individual permit). Duke, therefore, has included
12 months in the schedule to prepare and obtain any necessary USACE permits.
Once the RMDS is commissioned, the permitted discharge flows will change drastically. The amount
of water discharged could be reduced by as much as 85%. In addition, these flows typically were
treated along with the BATW in the ash basin. Duke, therefore, will need to design, and construct a
new treatment system for these low volume wastes. The size and technology of the treatment
system will be determined based on the water characterization study discussed above. In addition,

based on the final siting of the low volume wastewater treatment system, a new outfall may be
needed for the discharge of the effluent from this new wastewater treatment system. With
significant changes to the characteristics of the permitted discharge, Duke anticipates a NPDES
permit modification will be required to revise the permit to account for the changes in flow and
constituent make-up.
Even though the permitting task will be initiated during the design and engineering phase, it is
expect to continue through the procurement phase and up to the construction phase. In addition,
the extent and complexity of the permits required are unknown at this time. The required permits
will be evaluated during the engineering and design phase. Since the time needed to prepare the
permit applications and the time needed to receive the permits is uncertain, Duke allocated 6
months to account for potential permitting delays.
Procurement
After the design is complete, Duke will initiate the process to procure the necessary outside
resources to construct and install the new wastewater treatment systems. This process will involve
the following steps:
— Evaluate potential vendors for proposal solicitation;
— Develop and submit request for proposal (RFP) to selected vendors;
— Conduct a review and vendor selection based on the received bids;
— Develop required contract documents;
Acquire materials (potentially from overseas), which involves:
o Shipment, and
o Equipment Fabrication
— Fabrication and inspection of equipment.
RMDS have a fabrication queue that is dependent on total industry -wide demand. Duke, therefore,
has allocated 12 months to acquire the necessary materials.
Construction
Once all the necessary materials are procured, Duke estimates construction of the RMDS will take
approximately 13 months. In addition, the tie-in of the RMDS to each individual generating unit will
need to occur during outages, which are anticipated to occur between March to May and October to
November depending on generation demand.
Optimization and Operational Experience

As stated above, Duke is planning to have the equipment installed by December 31, 2019 at the
latest to meet the obligations under CAMA, in addition, to any CCR requirements. Again, these rules
regulate the bottom ash material, not the transport water. Given the system will continue to utilize
water to transport bottom ash, time will be needed to gain operational experience and optimize the
system to meet the zero discharge limit. Duke estimates a 16 month window will be required to gain
the necessary operational experience and fine-tune the system. The 16 month window is estimated
based on the potential that the station may only be operating at full load during the winter and
summer months and load and account for commissioning / optimizing occurring at multiple facilities
simultaneously. In addition, with NCDEQ approving the implementation date of January 31, 2021 for
Marshall Steam Station, Duke would like to stagger the commissioning / optimization activities for
Roxboro by 3 months.
C. New Wastewater Treatment System
As discussed above, with the removal of several non-BATW waste streams from the bottom ash
transport system, a new wastewater treatment system will need to be designed and constructed for
co -treatment of low volume waste and other regulated process streams per the CCR rule, ELGs, and
NDPES permitting requirements. The activities associated with the new wastewater treatment system
will be conducted concurrently with the other design activities at the site. These waste streams are not
subject to the applicability date in the ELG rule, therefore, Duke is not requesting a compliance date,
but this task will need to be completed prior to the effective date of the zero discharge of BATW.
Duke anticipates 30 months will be needed to design, install and commission the new wastewater
treatment system, based on the following preliminary timeline.
New Wastewater Treatment System
Activity
Duration(Months)
Siting
3
Engineering
6
Procurement
3
Construction/fie-in
9
Commissioning
3
Start -Up
6
Total:
30
D. FGD Wastewater
Duke expects significant capital improvements to the FGD wastewater treatment system will be
needed to meet the ELG limits. At a minimum, Duke anticipates having to install a new tank -based
physical / chemical treatment system followed by a selenium reduction technology. The selenium
reduction technology has not yet been selected and Duke will be evaluating suitable technologies

based on cost and feasibility. A biological treatment system is currently installed at Roxboro, but the
ELG limits cannot be achieved with the current system. Duke will evaluate the current biological
treatment system to determine whether the system can be used as part of an upgraded treatment
system or will need to be discarded and completely replaced.
In addition, the FGD flow rate for Roxboro is estimated at approximately 1,094 gallons per minute
(gpm). In the proposed ELG rule, EPA assumed Roxboro could reduce its FGD flow to 375 gpm by
recirculating some of the FGD water back to the FGD system. This would allow for the design of a
significantly smaller system, resulting in a significant reduction in cost. Duke is evaluating options to
reduce the FGD flow, which would affect the technology selection, design and cost of the system.
To further complicate matters, EPA's model technology for the treatment of FGD wastewater is
physical/chemical followed by biological treatment. Recently, the biological treatment system
vendor for the ABMet system, GE, has claimed intellectual property rights on all biological treatment
technologies for FGD wastewater. This could have significant impacts on the cost and procurement
schedule of the treatment system. With an EPA estimate of 88 stations within the industry expected
to upgrade the FGD wastewater treatment system to comply with the ELG limits, the
implementation date must take into account limited resources of EPA's chosen model technology.
EPA recognizes that designing, procuring, installing, and optimizing an FGD wastewater treatment
system is a complicated and time-consuming undertaking, involving much study and careful
planning. For example, EPA states:
"For plants that are planning to include fuel flexing in their operations, in the years
prior to the installation and operation of the FGD wastewater treatment system, the
plant should consider sampling the untreated FGD wastewater to evaluate the
wastewater characteristics that are present based on the differing fuel blends. Based
on those characteristics, the plant will be better able to design a system that can
properly treat its FGD wastewater given variability that might occur at the plant, and
it will be better prepared to adjust chemical dosages in the chemical precipitation
system to mitigate the variability in the wastewater that enters the biological
treatment system."
Response to Comments, p. 5-387.
EPA also states:
"While EPA has based the effluent limitations and standards for selenium and
nitrate/nitrite (as N) for FGD wastewater based on the performance of the Allen and
Belews Creek biological treatment systems, EPA does not contend that every plant in

the industry can simply take the design parameters from those two plants, install the
biological treatment system, and meet the effluent limitations. Each plant will need
to work with engineering and design firms to assess the wastewater characteristics
present at their plant to determine the most appropriate technologies and design the
system accordingly meet the effluent limitations. Therefore, some plants may need
to design the bioreactors to provide additional bed contact time (as provided by the
hydraulic residence time and volume of biomass and carbon substrate), while other
plants may find they need less."
Response to Comments, p. 5-389
Duke is requesting 87 months from the effective date of the permit to design, install and
commission the FGD wastewater treatment system to meet the BAT limits based on the following
preliminary timeline.
FGD WWT Upgrade
Activity
Duration (Months)
Design & Engineering
30
• Flow Reduction Evaluation
6
• Evaluation of the existing
biological system
6
• Technology Evaluation
8
• Siting
4
• Engineering
6
Procurement'
20
Potential Permitting Delays
6
Construction/Tie-in'
16
Start-up & Optimization'
15
• Commissioning
6
• Start -Up
6
Total:
87
1) Duke is allocating a 20 month window for procurement and a 16 month window for
construction and tie-in to account for only one vendor available to supply and construct the
biological treatment system.
2) Duke is allocating a 15 month window to complete the commissioning and start-up under
all expected operating conditions from full load to partial load to periods of no load.

Assuming a permit effective date of October 12016, Duke estimates the system can be installed and
commissioned to meet the BAT limits on or before December 31, 2023. To design, procure,
construct and commission the FGD WWT system at Roxboro, the following steps must be taken:
Design & Engineering
As with the RMDS, engineering and technology resources are limited due to regulatory
requirements for concurrent implementation of programs, such as the CCR Rule and NC-CAMA
across applicable sites in North Carolina. Duke is, therefore, estimating 30 months to complete the
design and engineering phase of the project.
FGD Flow Reduction Evaluation
Duke is evaluating options, such as recirculating some of the FGD water back to the FGD system, to
reduce the FGD wastewater flow rate to design and install a cost effective system. As stated above,
EPA assumed Roxboro could reduce the FGD wastewater flow to 375 gpm. Whether recirculating
some of the FGD water back to the FGD system is a viable option is dependent on the chlorides in
the FGD water and chloride impacts on the materials of construction of the FGD scrubber. Duke will
also determine if other flow reduction measures are available for Roxboro. This is a critical step in
the design and technology evaluation to ensure a cost effective treatment system.
Existing Bioreactor Evaluation
A biological treatment system is installed at Roxboro. However, the current system cannot meet the
final ELG limits for FGD wastewater. Currently, it is unknown whether the existing biological
treatment system can be used as part of an upgraded treatment system or if the biological
treatment system will need to be discarded and completely replaced. Duke, therefore, is planning
on conducting an evaluation to determine the feasibility and cost of using the existing biological
reactor or replacing the entire system.
Siting
As with the RMDS, the FGD WWT system will need to be sited to avoid any former or current CCR
sites and avoid construction areas that will be used to complete closure of the ash basins at
Roxboro. Additionally, Duke will need to site the system to avoid nuisance odor outside the property
boundary. Duke will also attempt to site the system to avoid WOTUS. However, based on the final
siting of the system WOTUS may not be avoided, and permits from the U.S. Army Corps of Engineers
may be required.
Technology Selection

Duke has significant experience in the design, construction and operation of biological treatment
systems for selenium reduction. Based on Duke's experience, biological treatment alone may not be
a fool proof technology based on the characteristics of the coal. Duke, therefore, is obligated to
review and evaluate whether other suitable technologies are available to treat FGD wastewater for
selenium reduction at Roxboro. This is particularly important with GE claiming intellectual property
rights on the biological treatment system for FGD wastewater, thus being the sole provider of this
technology. Duke will be working closely with utility organizations, such as the EPRI, to identify
suitable technologies for the removal of selenium from FGD wastewater and possibly additional
polishing steps that may be required to meet the limits.
Upon completion of the siting and technology selection, the engineering design of the system will be
completed.
Permitting
If WOTUS cannot be avoided, then permitting from the U.S. Army Corps of Engineers (USACE) will be
needed. At this time, it is unknown whether a USACE permit will be required or the type of permit
that may be required (nationwide permit (NPW) or individual permit). Duke, therefore, has included
12 months in the schedule to prepare and obtain any necessary USACE permits.
The installation of the FGD WWT may change the characteristics of the final discharge, therefore, a
NPDES permit modification may be required to revise the permit to account for the changes in flow
and constituent make-up.
Even through the permitting task will be initiated during the design and engineering phase, it is
expect to continue through the procurement phase and up to the construction phase. In addition,
the extent and complexity of the permits required are unknown at this time. The required permits
will be evaluated during the engineering and design phase. Since time needed to prepare the permit
applications and the time needed to receive the permits is uncertain, Duke allocated 6 months to
account for potential permitting delays.
Procurement
After the design is complete, Duke will initiate the process to procure the necessary outside
resources to construct and install the new wastewater treatment systems. This process will involve
the following steps:
— Evaluate potential vendors for proposal solicitation;
— Develop and submit a request for proposal (RFP) to selected vendors;
— Conduct a review and vendor selection based on the received bids;

— Develop required contract documents;
— Acquire materials (potentially from overseas), which involves:
o Shipment, and
o Equipment Fabrication
Fabrication and inspection of equipment.
The selenium reduction technology will have a fabrication queue that is dependent on total
industry -wide demand. With GE claiming intellectual property rights on biological treatment
additional time will need to be factored into the implementation date. Duke, therefore, has
allocated 24 months to acquire the necessary materials. Additionally, raw materials needed may
have an extended lead-time from time of order to delivery, such as the granulated activated carbon
used in the biological system, which has a lead time of 12 months. As stated above, GE is claiming
intellectual property rights on the biological treatment system. If this claim is upheld, GE will be the
only supplier of the biological treatment system. Given the potential number of facilities installing
treatment system for FGD wastewater in the industry, additional 8 months is allocated to account
for an extended procurement period.
Construction / Tie In
Once all the necessary materials are procured, Duke estimates construction of the FGD WWT will
take approximately 16 months to complete. In addition, the tie-in of the FGD WWT to each
individual FGD scrubber will need to occur during outages, which are anticipated to occur between
March to May and October to November depending on generation demand. Furthermore, an
additional 4 months were included in the schedule to account for the potential of GE being the sole
provider of the biological treatment system.
Commissioning & Start-up
Duke estimates that commissioning and start-up of the FGD WWT will take 12 months to complete,
6 months for each task. Duke, however, is allocating a 15 month window to complete the
commissioning and start-up under all expected operating conditions from full load to partial load to
periods of no load. This will allow the identification of necessary actions that need to be completed
in order to maintain the system under different operating scenarios.
E. EPA Provided a Range of Applicability Dates To Allow For Coordination across Regulatory
Requirements and to Promote Orderly Decisions
The steam electric industry is in the midst of major transitions driven by new environmental
regulatory requirements in the air, waste, and water arenas. In the ELG Rule, EPA explicitly
acknowledged the complications of planning and executing ELG retrofits while developing and

executing compliance strategies under the other rules. EPA made it clear that the range of
applicability dates provided in the ELG Rule are supposed to be implemented in a manner that
avoids stranded costs and promotes orderly decision making. For instance, EPA states:
"From an environmental protection/coordination standpoint, with the increased use of
flue gas desulfurization scrubbers and flue gas mercury controls in response to air
pollution -related requirements, this rule makes sense from a holistic environmental
protection perspective and from the perspective of coordinating across rules affecting
the same sector. This final ELG controls the discharges associated with these particular
waste streams."
Response to Comments, p. 8-388.
EPA also states that the permitting authority may "account for time the facility needs to coordinate
all the requirements of this rule, along with other regulatory requirements, to make the correct
planning and financing decisions, and to implement the new requirements in an orderly and feasible
way." Response to Comments, p. 8-129.
At Roxboro, we need to coordinate our ELG implementation strategy with CCR and NC-CAMA rules.
For both the CCR and CAMA rules, we are evaluating the current CCR ash ponds to determine
whether the ponds meet the locational restrictions of 40 C.F.R. 4 257.60 - .64. The future of the ash
pond under both of these rules will determine whether it is available or not to receive legacy
wastewaters (i.e., those wastewaters generated before the applicability date for bottom ash
transport water retrofits) and continue to receive non-BATW. In addition, as discussed above, the
final determination of the extent of the ash pond, as well as the closure method could have
significant ramifications for the siting of both the RMDS and FGD W WT.
F. ELG Implementation Should be Coordinated with the Clean Power Plan (CPP) to Avoid Stranded
Costs
The ELG Rule clearly contemplates that the compliance timelines for its requirements should
account for any applicable obligations under the CPP. However, the affected units at Roxboro will
not know their individual obligations under the CPP until well after November 1, 2018. As
promulgated by EPA, the CPP's emission guidelines do not apply directly to units. Instead, states are
responsible for developing state plans setting forth requirements applicable to individual units that
implement those emission guidelines. These state plans are subject to review and approval by EPA.
If EPA determines that the state has not submitted an approvable plan, then EPA will promulgate a
federal plan in its place. The timeline the CPP provides for developing and reviewing these state
plans involves numerous steps.

The initial deadline for state plan submittal was September 6, 2016. 40 C.F.R. § 60.5760(a). The vast
majority of states were expected to seek and obtain a two-year extension for final state plan
submittal until September 6, 2018. See id. § 60.5760(b). However, the Supreme Court issued a stay
of the CPP on February 8, 2016. Thus, the timing of the requirements of the CPP is uncertain at this
time, as we wait further decisions by the Supreme Court. Duke would like to request the option to
revise the applicability dates for the ELG requirements if the stay of the CPP is lifted and the
operation of Roxboro will be affected.
Statements in the Response to Comments regarding stranded costs apply to any rule, not just the
CPP. EPA explains in the Response to Comments that it provided flexibility in applicability dates so
that facilities could consider all new regulatory requirements and then have an adequate time to
plan and implement accordingly, and thus avoid stranded costs:
"EPA is sensitive to the need to provide sufficient time for steam electric power plants
to understand, plan for, and implement any changes to their operation to meet their
environmental responsibilities, and agrees with the commenter that transparency of
requirements is important for minimizing "stranded investments." ...Furthermore, as
described in the preamble, the final rule provides time for plant owners or operators to
implement changes to plant operations in order to meet the final limitations and
standards, as well as flexibility to permitting authorities in implementing the final rule.
The Agency specifically considered the timing of requirements of other environmental
regulations in establishing implementation requirements for the ELGs, in order to
provide steam electric power plants time to consider and implement their strategy for
compliance."
Response to Comments, p. 8-388.
Even though the implementation and effects of the CPP are uncertain, North Carolina Department
of Environmental Quality (NCDEQ) is justified providing flexibility in the applicability dates from
other regulatory requirements such as the CCR and NC-CAMA, as discussed above.
G. The Proposed Schedules Help to Maintain Roxboro's Availability to the Grid, Which Promotes Grid
Reliability
Duke developed the proposed BATW retrofit schedule and its applicability date with grid reliability
in mind. The dispatch of units at Roxboro varies throughout the year. Typically one unit is operating
throughout the year and all four units are typically dispatched from December to March and June
thru September. Therefore, the final tie-in schedule will avoid these months and more than likely
tie-ins will need to occur across more than one outage.

EPA explicitly notes that the permitting authority should consider grid reliability in setting
applicability dates: "EPA's decision is also designed to allow, more broadly, for the coordination of
generating unit outages in order to maintain grid reliability and prevent any potential impacts on
electricity availability, something that public commenters urged EPA to consider." 80 Fed. Reg. at
67,854, col. 2. See also Response to Comments, p. 8-138.
Also, EPA clearly anticipated that much of the new technology required for retrofits to bottom ash
transport water and FGD wastewater systems would be constructed in a manner that would not
interrupt routine facility operations, and then tied in during regularly scheduled plant or unit
outages. According to the preamble, the timing of the final rule "enables facilities to take advantage
of planned shutdown or maintenance periods to install new pollution control technologies." 80 Fed.
Reg. at 67,854, col. 2.
EPA also recognizes that tie-ins of new equipment may need to occur across more than one outage.
EPA states: "the need to span installation of equipment over separate unit outages [is] a
consideration that can be incorporated into the permit writer's determination of the 'as soon as
possible' date, assuming the plant provides documentation demonstrating such a need." Response
to Comments, p. 8-54.

Attachment 5
Clean Water Act 316(b) alternate schedule request
August 15, 2016 NPDES application update
Roxboro Steam Plant
NC0003425

Alternate Schedule Request §316(b) of the Clean Water Act
Roxboro Generating Station
Final regulations to establish requirements for cooling water intake structures at existing
facilities were published in the Federal Register on August 15, 2014 (i.e. regulations
implementing §316(b) of the Clean Water Act) with an effective date of October 14, 2014. Per
§125.91(a)(1)-(3) Applicability, the Roxboro Generating Station (Roxboro) is subject to the
requirements at §125.94 through §125.99 (316(b) requirements) based on the following:
— The facility is defined as an existing facility (i.e. commenced construction prior to
January 17, 2002);
— The facility is a point source discharge;
— The facility uses a cooling water intake with a design intake flow (DIF) of greater than 2
million gallons (MGD) to withdraw water from waters of the U.S.; and
— Twenty-five percent or more of the water withdraws on an actual intake flow basis are
exclusively used for cooling purposes.
Per §125.98(b) Permitting requirements, 316(b) requirements are implemented through the
NPDES permit. Facilities subject to the final rule are required to develop and submit application
materials identified at § 122.21(r). The actual intake flow (AIF) of the facility determines which
submittals will be required. All facilities with an DIF 2 MGD or greater are required to submit
material identified at §122.21(r)(2){8), whereas, facilities with an AIF greater than or equal to
125 MGD are required to submit additional information presented in §122.21(r)(9)-(13). The
AIF withdrawn by the station from Hyco Reservoir is above the 125 MGD threshold; therefore,
Duke Energy is planning on completing the following 316(b) submittals:
• § 122.2 1 (r)(2) Source Water Physical Data
• §122.21(r)(3) Cooling Water Intake Structure Data
• § 122.2 1 (r)(4) Source Water Baseline Biological Characterization Data
• § 122.2 1 (r)(5) Cooling Water System Data
• § 122.21(r)(6) Chosen Method(s) of Compliance with Impingement Mortality Standard
• §122.21(rx7) Entrainment Performance Studies
• § 122.2 1 (r)(8) Operational Status
• § 122.21(rx9) Entrainment Characterization Study
• § 122.21(r)(10) Comprehensive Technical Feasibility and Cost Evaluation Study
• §122.21(r)(l l) Benefits Valuation Study
• § 122.21(r)(12) Non -water Quality and Other Environmental Impacts Study
• § 122.21(rx13) Peer Review

Per §125.98(b) Permitting requirements, 316(b) requirements are implemented through the
NPDES permit. For Roxboro, the NPDES permit proceedings had begun prior to the effective
date of the rule. Therefore, 40 C.F.R §125.98(g) Ongoing permitting proceedings, applies to
Roxboro, which states:
"... whenever the Director has determined that the information already submitted by
the owner or operator of the facility is sufficient, the Director may proceed with a
determination of BTA standards for impingement mortality and entrainment without
requiring the owner or operator of the facility to submit the information required in
40 CFR 122.21(r).."
Only limited information regarding 316(b) was previously submitted to NCDEQ for
Roxboro. The previously submitted information consisted of a Proposal for Informational
Collection (PIC) request and a 316(b) Barrier Net Conceptual Design Report. In Duke's opinion,
the previously submitted information is not sufficient for NCDEQ to proceed with a
determination of BTA standards for impingement mortality and entrainment. As stated in the
preamble to the rule, "In such circumstances where permit proceedings have already begun prior
to the effective date of the rule, these facilities will still need to submit the appropriate permit
application materials found at § 122.21(r) permit applications during their next application." 1
Furthermore, the regulation states the owner of a facility whose current effective permit
expires after July 14, 2018, must submit the above information when applying for a subsequent
permit and the owner of a facility whose current effective permit expires on or before Jul 14,
2018 may request an alternate schedule for the submission of the above information . As
allowed under §125.95(a)(2) and stated in the preamble to the rule, Duke Energy would like to
request an alternate schedule for the submittals listed above. Duke Energy would like to request
the 316(b) submittals, with the exception of §122.21(r)(6) Chosen Method(s) of Compliance with
Impingement Mortality Standard, for Roxboro be required with the subsequent permit renewal
application due after July 14, 2018. Since Roxboro is subject to the entrainment best technology
available (BTA) determination, a compliance schedule to complete §122.21(r)(6) Chosen
Method(s) of Compliance with Impingement Mortality Standard will be requested to be included
in the permit upon issuance of the entrainment BTA determination. The alternate schedule
request is justified based on the following:
— Roxboro was not required to submit information requested in § 122.2 1 (r)(2), (3), (4)
and (5) under the remanded Phase II Rule because the station was planning to comply
by installing a barrier net to meet the through screen velocity limit.
— Information requested in §122.21(r)(6) — r(12) are new provisions and these
submittals must be developed with r(9) requiring two years of entrainment data.
' 79 Fed. Reg. 48358 (15 August 2014)
'Refer to §125.95(ax]) and (2)

l
— For the §122.21(r)(13) Peer Review, Duke Energy estimates this could take up to 12
months to complete. This, also, takes into account the other six Duke Energy stations
in N. Carolina and two stations in S. Carolina that will be undergoing the peer review
process concurrently.
— Additionally, the United States Environmental Protection Agency (USEPA) —
Headquarters (HQ) have indicated guidance is being prepared to assist in interpreting
and implementing the rule requirements, however, this guidance is not expected to be
issued until the 316(b) litigation is completed, which is not expected to occur until
2017.

Attachment 6
Process flow diagram with proposed future water
flow path
August 15, 2016 NPDES application update
Roxboro Steam Plant
NC0003425

Roxboro Steam Electric Plant Post ash basin flow outfall 003
Plant Proof
Streams
Water Treatment
Systems
Unit 4 Cooling
Water
0
N
KQ
E B Unit 3 Cooling
LL Water'
Altemative modes
C`I Unit 182
Cooling Water
Plant Drainage
System
Drains from oil
filled
equipment
containment
Treatment
(Oil/Water
Separator)
Unit Cooling
To Atmosphere
Tower
D
Outfall 005 (internal)
...........................................................
Maintenance Drain
To Atmosphere
Unit 3 Cooling
Tower
Stomrwater from
Gypsum Storage Pile Area
H
Domestic Sewage
Low Volume Waste Treatment Plant Hyco
Collection Sump ReserVOlr
P
I Ems, Flue Ges
......,_. Desulfudza0on
- Dledtarge
NH3 Vapor
Suppression Lined P/C,
FGD
0.. 00 (Emergency) Retention <""'- Uhra<"""'" Blowdown
�p basins filtration OR
(east and qBi�actor
R
Ash Landfill west)
Leachate EaWaY
seMeettltg
t and SW stormwater Sea PoPond
below
Silo Unit 3 Coding
Wash Water Tower Pond
Healed Water
Moong Zone
Stoonwator Efnuent Channel
AOW's and seeps FromLined
Out1a11010 1 Flush -
pond
Ash basin closure 0ows
M _ Hyco
Reservoir Evaporalmn
Outfall 003
Form 2C - Item II A Flows,
Sources of Pollution, and
Treatment Technologies
Outfall 003 Augusl2016

Roxboro Steam Plant Outfall 006
Raw water
tank tlreinage
Stomnvater
(maintenance)
Oulfall 006N
I Pile Runoff
Treatment Basin
Hyco Reservoir
pile runoff
ugenq Gypsum I
Truck wheel wash
stack
Fonn 2C — Item II A Flows,
Sources of Pollution, and
Treatment Technologies
Ouffall 006 August 2016

Roxboro Steam Plant Outfall 001
Stomreater
through remnant
of east ash basin
Outfall 001
Intake pumps (or
Plant Intake Canal � plant processes
Incidental
AOW's entl Gypsum and rail
seepage runoR
Outfall 000
Form 2C—Item It A Flows,
Sources of Pollution, and
TreatmentTechnologies
Outfall 0011 Augusl2616

DUKE
ENERGY,
PROGRESS
File: 12520
Mr. Rick Bolich
North Carolina Division of Environmental Quality
1628 Mail Service Center
Raleigh, NC 27699-1628
Subject: Roxboro Electric Generating Plant
NPDES Permit No.00003425
Five-day Follow-up Letter
Incident No.222096
Dear Mr. Bolich:
Duke Energy Progress, LLc
Roxboro Steam Electric Plont
! 700 Dannau'av Rmd
Semora. NC 17.t43
October 22, 2019
t
If "/A l l
NC Dept of Environmental Quality
OCT 282019
Raleigh Regional Office
On October 20, 2019 at approximately 1:23 P.M., Duke Energy staff made verbal notification to Mr.
George Bernard of an unanticipated bypass of treatment at the Roxboro Steam Station in Person County.
The verbal notification was made as required by Part II, Section E.9.(c) of the above -referenced permit.
Also, as required by Part II, Section E.9, this letter fulfills the five-day written letter requirement.
At approximately 7:32 A.M. on Sunday, October 20, 2019, station operations received a Hi level alarm in
the process water redirect sump during a period of intense rain. Station operations verified from DCS that
two available normal service pumps (pumps B & C) were in service and operating when the Hi Hi level
alarm was received approximately two minutes after the first alarm. A station operator was dispatched to
investigate. While in route, another alarm for Lined Retention Basin inlet valve deviation was received,
indicating low flow for the B & C pumps and tripping both off. The station operator and supervisor
arrived at the sump to find the level elevated and overflowing into the heated water discharge canal. A
higher capacity secondary Lined Retention Basin inlet valve failed to open on the Hi Hi level alarm which
also had signaled and caused the primary valve to close. The primary inlet valve was forced open from
the DCS allowing flow from the B & C pumps to be restored. Concurrently, the operator and supervisor
placed the standby diesel pump in service.
The process water redirect sump level decreased below overflow within 4 minutes. Total estimated
overflow time was 10 minutes according to DCS alarm history. The primary inlet valve will remain in
manual to prevent loss of flow until the secondary valve can be repaired.
The total bypass volume discharged to heated water discharge canal was estimated to be 3,500 gallons.
Duke Energy made an environmental event press release on October 20, 2019 and included it on the Duke
Energy website.
If you have any questions concerning this submittal, please contact Ms. Lori Tollie at (336)-8544916 or
at [e-mail].
'7 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

�L) DUKE
ENERGY_
PROGRESS
juke Energy Progress, LLC
Roxboro Steam Eleetde Plans
700 Dunnawav Rood
Serm m. NC 27343
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. f am aware that there are significant penalties for submitting false information,
including the possibility of f nes and imprisonment for knowing violations. "
Sincerely,
Tom Copolo
General Manger — Roxboro Steam Station

(' DUKE
ENERGY,
PROGRESS
File: 12520
Mr. Rick Bolich
North Carolina Division of Environmental Quality
1628 Mail Service Center
Raleigh, NC 27699-1628
Subject: Roxboro Electric Generating Plant 00a 3.4t%X
NPDES Permit No.00003425 F N
Five-day Follow-up Letter
Incident No.222096
Dear Mr. Bolich:
Duke Energy Progress, LLC
Roxboro Steam Electric Plant
1700 Amami Rmid
Semra. NC 27343
October 22, 2019
fpjA 11
NC Dept of Environmental Quality
OCT 2 8 2m
Raleigh Regional Office
On October 20, 2019 at approximately 1:23 P.M., Duke Energy staff made verbal notification to Mr.
George Bernard of an unanticipated bypass of treatment at the Roxboro Steam Station in Person County.
The verbal notification was made as required by Part II, Section E.9.(c) of the above -referenced permit.
Also, as required by Part II, Section E.9, this letter fulfills the five-day written letter requirement.
At approximately 7:32 A.M. on Sunday, October 20, 2019, station operations received a Hi level alarm in
the process water redirect sump during a period of intense rain. Station operations verified from DCS that
two available normal service pumps (pumps B & C) were in service and operating when the Hi Hi level
alarm was received approximately two minutes after the first alarm. A station operator was dispatched to
investigate. While in route, another alarm for Lined Retention Basin inlet valve deviation was received,
indicating low flow for the B & C pumps and tripping both off. The station operator and supervisor
arrived at the sump to find the level elevated and overflowing into the heated water discharge canal. A
higher capacity secondary Lined Retention Basin inlet valve failed to open on the Hi Hi level alarm which
also had signaled and caused the primary valve to close. The primary inlet valve was forced open from
the DCS allowing flow from the B & C pumps to be restored. Concurrently, the operator and supervisor
placed the standby diesel pump in service.
The process water redirect sump level decreased below overflow within 4 minutes. Total estimated
overflow time was 10 minutes according to DCS alarm history. The primary inlet valve will remain in
manual to prevent loss of flow until the secondary valve can be repaired.
The total bypass volume discharged to heated water discharge canal was estimated to be 3,500 gallons.
Duke Energy made an environmental event press release on October 20, 2019 and included it on the Duke
Energy website.
If you have any questions concerning this submittal, please contact Ms. Lori Tollie at (336)-854-4916 or
at [e-mail].
"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 qu alifted personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or

(� DUKE Duke Energy Progress, LLC
ENERGY:; Roxboro Steam Electric Plant
1700 Dunn"m Raid
PROGRESS Semora. NC 273d3
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. / am aware that there are significant penalties for submitting false information,
including the possibility of f nes and imprisonment for knowing violations. "
Sincerely,
Tom Copolo
General Manger — Roxboro Steam Station

Manuel, Vanessa
From: Manuel, Vanessa
Sent: Wednesday, September 25, 2019 2:10 PM
To: Grzyb, Julie; Chernikov, Sergei; Weaver, Charles; Hill, David A
Cc: Bolich, Rick
Subject: Duke Energy Roxboro Steam Electric Plant (NC0003425) - Permit Condition A. 12
Julie or Sergei —
For the Roxboro Steam Electric Plant (NC0003425), I need your help with interpreting the permit requirement
established by permit condition A.12 regarding temperature.
For the June and July 2019 monitoring data, BIMS has generated monitoring frequency violations for Duke Energy's
Roxboro plant (NC0003425) for failing to monitor temperature daily on outfall 002A. The RRO issued a NOV to DE for
the June 2019 violations. In response, DE stated that based on permit condition A.12, the monthly average for
temperature shall consist of at least 5 temperature readings (determinations) ... there is no requirement to monitor
temperature daily.
This seems to be one of those unique type permit conditions that's hard to reflect in BIMS. What is the required
monitoring frequency for temperature? If it's less than daily, could BIMS be updated accordingly? This will prevent
future, unwarranted violations from being generated.
Thanks for your help with this permit condition interpretation.
Vanessa E. Manuel
Environmental Program Consultant
Division of Water Resources — Raleigh Regional Office
Department of Environmental Quality
919 791-4255 office
vanessa.manuel(a)ncdenr.gov
Physical: 3800 Barrett Drive, Raleigh, NC 27609
Mailing: 1628 Mail Service Center, Raleigh, NC 27699-1628
1�
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

0-1
DUKE
' ENERGY:
September 16, 2019
Rick Bolich
Water Quality Regional Operations
North Carolina Division of Water Quality
1628 Mail Service Center
Raleigh NC 27699-1628
RE: Duke Energy Progress, LLC — Roxboro Plant
NPDES Permit Number NC0003425
Response to NOV-2019-MV-0130
Request for withdrawal of NOV
LUTIM3fn.31in111
Paul Draovitch
SVP Environmental Health & Safety
526 S. Church Street
Mail Code:EC3XF
Charlotte, NC 28202
W( Oept of F,nvironmental Quality
tiEP 19 20111
0-,IriW,,II Regional Office
Duke Energy received the subject NOV on September 9, 2019 for perceived monitoring
frequency violations related to temperature monitoring at the Cane Creek temperature buoy
identified as sample location "002A:" in the BIMS computer system. This submittal is intended
to provide some background and clarification as to the circumstances surrounding the situation
and to follow up on conversations between members of Duke Energy staff (Robert Howard and
Lori Tollie) and Ms. Vanessa Manual of your staff subsequent to the receipt of the NOV.
On June 7 h, 2019 the historical temperature data loggers were removed from service as part of a
temperature monitoring upgrade project. The antiquated temperature dataloggers were replaced
with radio frequency devices that will transmit data wirelessly. The new wireless data loggers
were placed in service on July 23rd, 2019. The Roxboro Steam Station eDMR listed 6 days of
temperature data for the month of June and a comment detailing the equipment upgrades being
undertaken as described above.
The effective Roxboro NPDES permit does not identify or list an outfall 002A. This designation
was set up in the BIMS system to be able to submit temperature readings from the Cane Creek
temperature location buoy. The permit contains two conditions, A(2) and A(12), that describe
limits and monitoring frequencies for the effluent and the 4C4D transect location temperature
buoy within the reservoir. Condition A(12) details the terms regulating the temperature
monitoring in the reservoir and states that "A monthly average temperature shall consist of at
least five determinations conducted on five separate days."
Historically, the Roxboro Steam Station has submitted at least five determinations monthly for
all temperature monitoring locations identified in the permit. The Hyco Reservoir is permitted as
a thermal mixing zone with the water quality temperature compliance point being the USGS
gauging station located on the Hyco River just downstream of the Afterbay of the Reservoir dam.

Mr. Rick Bolich
NOV-2019-MV-0130 Response
September 16, 2019
The attached graph represents the compliance temperature data for the month of June 2019 as
recorded by this USGS gauging station. The graph confirms water released from the Afterbay
was well within compliance with the water quality temperature standard for the entire month of
June.
Because language related to temperature requirements has caused confusion in the past, Duke
Energy has previously requested the language related to temperature monitoring in condition
A(2) and A(12) be clarified in the next issued permit for the station. This has been done by the
agency in the DRAFT permits for the station but no final permit has been reissued as of the date
of this letter.
In summary, Duke Energy complied with the terms of temperature monitoring found in condition
A(12) of the existing permit while taking the steps to upgrade its network of temperature
monitoring equipment to a more advanced state. There is not an outfall 002A in our effective
permit. Outfall 002A is a point set up in the BIMS system to be able to accept data from the
Cane Creek location of the reservoir. Data attached demonstrates that the temperature of water
released from the Afterbay was well within the temperature standard as required by the permit.
Duke Energy respectfully requests that this Notice be rescinded and the BIMS system be updated
to reflect the monitoring conditions specified in condition A(12) of the NPDES permit for each
temperature monitoring location. Duke also requests that the language related to temperature
monitoring in the DRAFT permit be evaluated to assure a consistent and clear requirement going
forward.
Thank you for your time and attention to this request. If there are any questions, please contact
Lori Tolfie at 336.854.4916 or at [e-mail].
I certify, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system,
or those persons directly responsible for gathering the information, the information submitted is, to the best
of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties
for submitting false information, including the possibility of fines and imprisonment for knowing violations.
Environmental Health & Safety
Duke Energy

Mr. Rick Bolich
NOV-2019-MV-0130 Response
September 16, 2019
USGS 02077303 HYCO R BL ABAY D NR MCGEHEES MILL, NC
H 27.8 88.8 L
u �
26.8 u
78.8 i
N
25.8 `
u 76.8 H
v
24.8
yn 23.8 74.8 9
N 72.8 d
m 22.6 m
L 2
d
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L
28.8 68.0 LO
a
19.8 u
Jun 81 Jun 88 Jun 15 Jun 22 Jun 29 �-
2819 2819 2819 2819 2819
---- Provisional Data Subject to Revision ----
- Daily naminun temperature — Daily nean tenperature
— Daily nininun tenperature

ROY COOPER
Gmrrnw
MICHAEL S. REGAN
Srvrfarl
LINDA CULPEPPER
W.T w
Certified Mail # 7017 0190 0000 9562 7213
Return Receipt Requested
Paul Draovitch, Senior VP
Duke Energy Progress LLC
526 S Church St - Ec3xp
Charlotte, NC 28202
cur
NOR'.N CAROLNA
Envnrmmenral Quallry
September 4, 2019
SUBJECT: NOTICE OF VIOLATION & INTENT TO ASSESS CIVIL PENALTY
Tracking Number: NOV-2019-MV-0130
Permit No. NC0003425
Roxboro Steam Electric Power Plant
Person County
DearPermittee:
SEP 0 .i 2019
BY:?.D
�1 •
A review of the June 2019 Discharge Monitoring Report (DMR) for the subject facility revealed the violation(s)
indicated below:
Monitoring Violation(s):
Sample
Location Parameter
002A Effluent Temperature, Water Deg
Centigrade (00010)
Monitoring
Date Frequency Type of Violation
6/7/2019 Daily all days Frequency Violation
002A Effluent Temperature, Water Deg.
6/8/2019
Daily -- all days
Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg.
6/9/2019
Daily -- all days
Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg.
6/10/2019
Daily -- all days
Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg.
6/11/2019
Daily all days
Frequency Violation
Centigrade (00010)
Q �•I y�, '.:YJ':r:�lCi7^fr::`.Er..,=!'U ti-: :.l::fa:i 1••tt!'F13:.':!3
F:: t•F!{:r. Cr:013£:-Err; �•.l I F:lt• M1: ••=va n; 2_z

Monitorino Violation(s):
Sample Monitoring
Location Parameter Date Frequency Type of Violation
002A Effluent Temperature, Water Deg. 6/12/2019 Daily — all days Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
6/13/2019
Daily — alldays
Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
6/14/2019
Daily — all days
Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
6/15/2019
Daily — all days
Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
6/16/2019
Daily — all days
Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg
Centigrade (00010)
6/17/2019 Daily — all days Frequency Violation
002A Effluent
Temperature, Water Deg.
6/18/2019
Daily — all days
Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
6/19/2019
Daily — all days
Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
6/20/2019
Daily — all days
Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
6/21/2019
Daily — all days
Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
6/22/2019
Daily -- all days
Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
6/23/2019
Daily — all days
Frequency Violation
Centigrade (00010)
002A Effluent
Temperature, Water Deg.
Centigrade (00010)
6/24/2019 Daily — all days Frequency Violation
002A Effluent Temperature, Water Deg.
6/75/2019
Daily -- all days
Frequency Violation
Centigrade (00010)
- -
002A Effluent —Te—mperature, Water Deg..
-
6J26/2019
Daily -- all days
Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg.
6/27/2019
Daly -- all days
Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg.
6/28/2019
Daily — all days
Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg.
Centigrade (00010)
6/29/2019
Daily -- all days Frequency Violation
002A Effluent Temperature, Water Deg. !6/30/2019 Daily — all days Frequency Violation
Centigrade (00010)
DEWs Kah ear- ro Dapanmtn:-fer. r:rma•to rlcs::I DvSir aMrr Ras -"al
0 Fo#I, Sol zrA CB: 5: So, e=Dtra IF* e;c N:,v:are rs:o:e

A Notice of Violation/Intent to Issue Civil Penalty is being issued for the noted violation of North Carolina General
Statute (G.S.) 143-215.1 and the facility's NPDES WW Permit. Pursuant to G.S. 143-215.6A, a civil penalty of
not more than twenty-five thousand dollars ($25,000.00) may be assessed against any person who violates or
fails to act in accordance with the terms, conditions, or requirements of any permit issued pursuant to G.S.
143-215.1.
If you wish to provide additional information regarding the noted violation, request technical assistance, or
discuss overall compliance please respond in writing within ten (10) business days after receipt of this Notice. A
review of your response will be considered along with any information provided on the submitted Monitoring
Report(s). You will then be notified of any civil penalties that may be assessed regarding the violations. If no
response is received in this Office within the 10-day period, a civil penalty assessment may be
prepared.
Remedial actions should have already been taken to correct this problem and prevent further occurrences in the
future. The Division of Water Resources may pursue enforcement action for this and any additional violations of
State law. If the violations are of a continuing nature, not related to operation and/or maintenance problems,
and you anticipate remedial construction activities, then you may wish to consider applying for a Special Order by
Consent.
Reminder: Pursuant to Permit Condition 6 in Section E, the Permittee is required to verbally notify the Regional
Office as soon as possible, not to exceed 24 hours, from first knowledge of any non-compliance at
the facility including limit violations, bypasses of, or failure of a treatment unit. A written report may
be required within 5 days if directed by Division staff. Prior notice should be given for anticipated or
potential problems due to planned maintenance activities, taking units off-line, etc.
If you have any questions concerning this matter or to apply for an SOC, please contact Vanessa Manuel of
the Raleigh Regional Office at 919-791-4200.
Sincerely,
Rick Bolich, L.G., Assistant Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ
Cc: WQS Raleigh Regional Office - Enforcement File
Laserfiche
-�� L`S!Jr" rf :!car}r:: ¢r. :rr:•:f i•f ij I ��'t:-Ct i. fif'F3F:•':!1
_ `1.4' -,.i rea.r. [":f. n___of—:r [�.f!:fe{• �..:f•: •f i'e_c

i
1
ROY COOPER
Cmtrnur
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Uary nN
Certified Mail # 7017 0190 0000 9562 7213
Return Receipt Requested
Paul Draovitch, Senior VP
Duke Energy Progress LLC
526 S Church St - Ec3xp
Charlotte, NC 28202
N04 i H "ARCLIN?,
Environmental Quality
September 4, 2019
SUBJECT: NOTICE OF VIOLATION & INTENT TO ASSESS CIVIL PENALTY
Tracking Number: NOV-2019-MV-0130
Permit No. NC0003425
Roxboro Steam Electric Power Plant
Person County
Dear Permittee:
A review of the June 2019 Discharge Monitoring Report (DMR) for the subject facility revealed the violation(s)
indicated below:
Monitoring Violation(s):
Sample
Location Parameter
Monitoring
Date Frequency Type of Violation
002A Effluent Temperature, Water Deg. 6/7/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/8/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/9/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/10/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/11/2019 Daily all days Frequency Violation
Centigrade (00010)
D_EQ�a

Monitoring Violation(s):
... Sample
..ice .. Parameter
002A Effluent Temperature, Water Deg.
Centigrade (00010)
Monitoring
Date Frequency Type of Violation
6/12/2019 Daily -- all days
Frequency Violation
002A Effluent Temperature, Water Deg. 6/13/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/14/2019
Centigrade (00010)
Daily -- all days
Frequency Violation
002A Effluent Temperature, Water Deg. 6/15/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/16/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/17/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/18/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/19/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/20/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/21/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/22/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/23/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/24/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/25/2019 Daily -- all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/26/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/27/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/28/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/29/2019 Daily all days Frequency Violation
Centigrade (00010)
002A Effluent Temperature, Water Deg. 6/30/2019 Daily all days Frequency Violation
Centigrade (00010)
MEhoar Fr

A Notice of Violation/Intent to Issue Civil Penalty is being issued for the noted violation of North Carolina General
Statute (G.S.) 143-215.1 and the facility's NPDES WW Permit. Pursuant to G.S. 143-215.6A, a civil penalty of
not more than twenty-five thousand dollars ($25,000.00) may be assessed against any person who violates or
fails to act in accordance with the terms, conditions, or requirements of any permit issued pursuant to G.S.
143-215.1.
If you wish to provide additional information regarding the noted violation, request technical assistance, or
discuss overall compliance please respond in writing within ten 10 business days after receipt of this Notice. A
review of your response will be considered along with any information provided on the submitted Monitoring
Report(s). You will then be notified of any civil penalties that may be assessed regarding the violations. If no
response is received in this Office within the 10-day period, a civil penalty assessment may be
prepared.
Remedial actions should have already been taken to correct this problem and prevent further occurrences in the
future. The Division of Water Resources may pursue enforcement action for this and any additional violations of
State law. If the violations are of a continuing nature, not related to operation and/or maintenance problems,
and you anticipate remedial construction activities, then you may wish to consider applying for a Special Order by
Consent.
Reminder: Pursuant to Permit Condition 6 in Section E, the Permittee is required to verbally notify the Regional
Office as soon as possible, not to exceed 24 hours, from first knowledge of any non-compliance at
the facility including limit violations, bypasses of, or failure of a treatment unit. A written report may
be required within 5 days if directed by Division staff. Prior notice should be given for anticipated or
potential problems due to planned maintenance activities, taking units off-line, etc.
If you have any questions concerning this matter or to apply for an SOC, please contact Vanessa Manuel of
the Raleigh Regional Office at 919-791-4200.
Sincerely,
Rick Bolich, L.G., Assistant Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ
Cc: WQS Raleigh Regional Office - Enforcement File
Laserfiche glgi'/y

(' DUKE
n ENERGY
PROGRESS
File: 12520Q
NCDEQ — Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject:: Roxboro Steam Electric Plant
Groundwater Monitoring Sampling and Analysis Result%
NPDES Permit #NC0003425
Dear Sir or Madam:
Duke Energy Progress, LLC
Roxboro Steam Eleetric Plats
1700 D unn,mar Rmd
.Semnra, NC 27343
August 20, 2019
NC Dept of Environmental Qua Iit..
(..uu 7 F ?r',,Q
Raleigh Regional Ufficc
Duke Energy Progress, LLC. (DEP) sampled eight compliance wells around the ash basins at the Roxboro
Steam Electric Plant on July 24 and 29, 2019. Attached are two copies of the results on DEQ approved
electronic version of Form GW-59CCR.
Please contact Kim Witt at [phone] or kimberlee.witt@duke-energy if you have any questions on
the sampling results.
I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility offnes and imprisonmentfor knowing violations.
Sincerely,
lz,—_ �
Tom Copolo
GM 111 Regulated Fossil
Roxboro Steam Electric Plant
Attachment
NCDEQ Cc: Debra Watts
Rick Bolich

GROUNDWATER QUALITY MONITORING
COMPLIANCE REPORT FORM
FACILITY IXFORMGTNNI
FaCRI' NBme:
.-Fi Name (R diherem,
Facllh, Address:
Semora
IGtN
Centad Peorms
Well Le.,Fm/She Name'.
Noeawmarerl arT e
Roabere Steam EleRdc Plant
Dube Ere Y'Alms, UC
t,. Dunnewy Read
Isneeel
NC 1 27343 Caesars 0
Wart) (be)
IOm VAR lekpnmse0 336215-15]fi
ROaboroA POM WeAs xD. W wIIFm Oe umPkd: 8
IM1um Pe�hl
WV
Units
M I I
CW-1
CW-20
M-3
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CM 4
Well De h Itsbatow land ardfimil
It
39.75
1].50
29.90
11 a0
66.50
3900
Mesaurin Poim (t«)Ih.beee land sume.)
X
20
2.8fi
2.45
3.33
3A9
2.39
Well Diameter
In
20
10
2.0
ID
2.0
2O
SrevoT Ih Whose land surlarel
X
1995
1)0
2510
3at)
4170
2a 20
Breen Bette lh benaxr land surlaae7
X
39)5
1]50
2990
1140
4650
3900
Martha MeasuringPoint Elevatlen
h
1.R
a2460
424.60
45119
45161
4]965
CHECK IF DRY WEIL AT TIME OF SAMPLING
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07/211ZG19
07/21/2019
07/29/2019
VhumeoFWatmpum d/balled
al
owl
O.Hil
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2.39
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2.44
1.17
Oxidation BNustim Potential RUD901
mV
122
194
302
269
2%
131
SOetlR<Cord -field OK
umM1m/on
714
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569
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Labaea<ory Name
Sample Ana'sis Date
Dube Energy Analytical Laboratory
IUIY 35, 2019-.'st
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0.66 e0.0i3 03a
U.Odmlum 02027
2
I
Q <I .11
ell <3 41
G-Uromlum l01D34
l0U&JI
6 <5 6
-$1 4
Cu-Cmxr101042
1
m
m.Das mms 0005
<o.ODs row s 41005
Fe.Imn I0104S
3W
171 137slal <101 71 116
-Merau ]1900
1all
Amsl 401 < Usl <0.05 40.95
Mn-lea'.... 010 5
SO
u I
29 137es<5 4 4 6
N
M-du01057
]00
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IS
.11 <1 <1 <1 <1 <
la OIPR
1
000E si <0105 0.
N'BNIYm 10100]
MO
111 49 1!
8-Bw0n101022
]ILO
W 60 <SO
tl-Tha01um(01059)
Ol
NE
1
N.2 W2 <O.i 41
Sb-Mtlmony(0107)
t
NF
<1 <1 <1
m5n
Se- Selenium 10130
!0
<1 <1 <1
Aleallnity 200410)
NE
1
2% 349 226
N-Aluminum Ulm
NE
40 19 66 1
M- Runs...
4
M
I
<1 <1
K03- NnrbOnata 100440
NE
ZDi 3a9 2M 3
6 GIdum100916
NF
1
a9.b 488 a8 5L5
CO3-Carbonate ears
RE
e5 <5 b 6 6
Go. CebaDl0103T
1
NE
1
<1 q sl <1 <1 <
-Ma euum W93))
NF
real'
223 3]5 384 30.6
MD-Mhybdenum101062
NF
rI 4 el 6 246 5.
A'PotaMlam M37
NF
265 126 255 3.21 a.32 43
Na 50dism 82035
NF
1
]G.] 84.1 37 483 188
TSS-T.1 Su,. Solid, 702311
Nf
6 <5 CS <5
S
V-Wn dher 0108]
03
HE
1
21.4 22 I3 3.42 2,13 21'
Sr-SXentlum l01M2)
NF
.0
0.52] 0.425 0323 0.3]5 DIBl
blO values seual or eemed the coremramhng 2L s4Mand
m evMee wmbmwon we vary.
-`J�d ti Ye u - &k 1u Q� V StAucabs
euxa6eic none
1-ineelor AummiledAgmDHameanalme rueremmwrym
GW.59CCR 09/2015 slM IMACf wee lNaNm ml0,xolv.na:Dss; nOwv.. NCDEDna4 elm aUAWISM.nSm mae. amentamN,sdes0lb.dmlSA

Mall original
a dltoay m: '
Samples For metals were collected unfiltered! L Vas L No
and field addifiednyet No
�PWP"b nlatnds daeryNaq aUW?ae'frd lalonbry Iamwwle Mal XiereaaaalY"(aan1 Pa11Nllaabr udrMlnP iia YdunlsEm,n4Madfielpondabilityadfififinds
0L@02 IeL For MIS reemn, IMACt noted on the report are he reference onry.
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o
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ti

GROUNDWATER QUALITY MONITORING
COMPLIANCE REPORT FORM
FACILITY INFORM4PDX pease %Int CleerlY erT e
Fadliry Name: Roxboro Steam FleddC Punt
Remit Name lit different): Duke t,,trgy P,ogmss. DEC
FaeiIHYAddmin: 1 17M Dunnamy Road
Is0eed
Senn.o NC 27M3 j Gamnry Person
IOhI (-I Ilipl
Contact le-ii I we. Win Telephmd I 33 2153576
Well botien/she Mame: RMbOr0 A5b POntl Wells Ne. el wellam6e sampled: 8
frompermul
77 841
units
ME
CW-2
I CW-2D
CW A
CW 30
M4
Well Depth IF below lane a„daeel
h
1250
2990
11.40
4fi.50
390D
Measurin emm" I lh slimes land wrfaee)
h
2.M
2A5
3.33
3.49
239
We1101ame<v
In
30
zO
20
2.0
20
1,rmn Tom lh Mimw lantlwrtaml
h
15�24
270
25.10
340
41.70
2420
sve- emImn lh bet. land surfaal
h
1] 50
29.90
1140
46.50
39 M
Relative Measmrin ii Flewlism
h
42460
42460
45179
451.61
479.65
CHECK IF DRY WELL AT TIME OF SAMPLING
❑wr
❑mv
❑oer
❑0cr
❑DRY
❑wr
ISA-2l
Units
CW1
M2
CW-2D
CW-3
CW-31)
Cl
Sam Ie one
07/29/2019
07/24/2019
07/24/2019
07/24/2019
07/24/2019
0)/29/2015.
Youme ml Waler 1-ned/belled
Fell
0.50
0.50
1Do
350
0.45
1.
T erature OOo10
tl .<
25.0
1110
UB0
190
190
26.
Odor100085)
"'me,
Name
N.
uses
N.
Me
Cleser
Gear
Onr
Our
sea
ae
Turetn"1820]B
NFU
4.fi
4.32
2A
1.4
2.5
9.3r
NsvlvsE Distill00300
0.37
O67
2.39
2.6
2.44
1E
Oddetbn hduttlem Potential(0009p)
mV
in
194
202
269
256
13
ed6a Cmnd - field Doi
umhm/am
714
891
"1
]1)
56e)
5%
Water level lh below measuring pL1145W1
It
21
1375
13M
5.5
272
302{
Xflela W4DJ
6.5-8.5
SU
1 621
691
Dal
631
7 31
6.'
laboratory Name
Sample Analysis Date
DURe Fnerry MaMinl laboratory
luly Is. 2079 ..st )...
,.Mi
15A11
Units
CW-1
CUM-2
CW-20
CW-3
CW-30
M.
TOS- Fetal qn. Solids (703001
500
Rai
Fee
511
413
424
314
35,
a -al«Ids 100940)
350
m 1
9A
26
16
41
25
2F
As. Arsmk 101002)
10
1
R1
<1
<1
<1
R1
Sp -Ulu. 1009451
3511
Will
95
90
110
54
32
3.
IK4me INCH) - N 100620
W
1
N.W6
0.22
0.35
066
AD13
0.3:
CL Ctlmlum 01027
2
Ull
q
<S
<1
R1
Q
Or -Chromium (01034)
0
sells
6
<5
RS
<5
6
a- Cell0104x
I
m I
moos
m.005
a90s
moos
m.aas
mW�
Fe - ben 101045
300
Uelf
17
137
RED
<20
II
211
-Mery r, 171100)1
u I
41%
RODS
REM
RODS
<005
<0.01
an Mn-Manise 101055
SO
uFit
29
127
b
<5
M
11
M-rests) poloi
100
u I
6l
<5
a
51
RS
ro-I:W(01051)
ssugA
R21
<1
<1
<1
n
2a-Zinc I01092
I
m
D.WS
4LUDS
moos
moos
moos
0.Doi
a-eadum 0100))
Mi
160
ios
350
111
48
1T
8-loon I01033
7e0
u I
40
<50
W
50
b0
<51
T-Thallium 101M9
0.2
ME
u 1
m2
<0.2
AS
<0.2
<03
A:
Sh-AmImamY10109))
I
MF
<1
q
<1
<1
<S
S-Lknlum 0114]
ID
u
.1
<I
<t
<3
A
AlblinlM � (00410)
ME
1
259
313
2W
249
226
23f
N-Aluminum 01105
ME
<10
19
QO
19
fi6
W
8e- Ilum 01012
4
NE
u I
<1
<1
<1
<1
R1
<
HCO3-vtemb nmM40 e O
NE
m I
259
313
209
249
an
2
6-Oldum 111i
-
NF
I
FEES
488
N
57..5
73.9
4
Oil -Cadmium fool
M
I
6
<5
b
R5
<5
Cn'CObaNI0103)
1
NE
u I
<1
Q
<1
<1
<1
nulum 10092)
ME
nod,
223
37.5
39.4
30.6
18.6
26:
rem-Mal"cu uml0lWzl
MI
ull,
R1<3
A
.12.46
5.
K-NMsslumf00Y3)l
F.
I65
1.26
255
121
4.32
4.3
Ne- Imdium l820351
NE
I mK/I
76.7
84.1
37
48.3
18A
TSS- Tmul Susp. Solids 170031
M
1 911
6
<5
R5
RS
5
V-Vanaelum 01087
03
1 NE
u 1
LA
22
13
142
2.13
2.2
Sr-Suontlum(01W2)
ME
m8/I
O.S27
0425
0.322
0375
0.281
0.19,
solo came, mmamr--dth--lomntlmg 21 ]mnmm n-,
O /ax P/ W w OA W CIS V StAial JS
Perminee for Aum«ode ABenq xame and ram-pea-imm «type
GW-59CCR 09/2015 r01e 1MA4 were laauad In 2010,ZY21.a1Wx012;NereerHDF1 Fee net esbblls8ed a 11M these eene0luema-dawumit N IMA

I
I
Mall erl{Innl '
add 1pppy.. '
.w. Indoctrination
Well to Number (From Permit)
and field acidified: Itic to
0®®®®®®®®®®
yappmvedmeOgEsofanapalsbya OWO-cerll(ed laboratory Iam entire mat thereare stpndram penaMles for submiXiep bite recantation, froludmBOupossibilMolri
02L0202 (c). for Mli reeeen. IMP[; noted on the report are for reference only.

WWTP Upset, Spill, or Bypass 5-Day Reporting Form
Page 2
DWR
Division of Water Resources
(Please Print or Type Use
Permittee: Duke Energy Carolinas, LLC Permit Number. NC00003425
Facility Name: Roxboro Steam Electric Plant County: Person
Incident Started: Date: 6/14/19 Time: 10:00 am
Incident Ended: Date: 6/14/19 Time: 2:05 pm
Level of Treatment:
_X—None _Primary Treatment _Secondary Treatment Chlorination/Disinfection Only
Estimated Volume of Spill/Bypass: 12,500 gallons (must be given even if it is a rough
estimate)
Did the Spill/Bypass reach the Surface Waters? X Yes No The discharge was to the
permitted heated discharge canal which discharges out permitted outfall 003 to Hyco Reservoir
If yes, please list the following:
Volume Reaching Surface Waters: 12,500 gallons Surface Water Name: Hyco Reservoir
Did the Spill/Bypass result in a Fish Kill? _Yes X No
Was WWTP compliant with permit requirements? X Yes No
Were samples taken during event? _Yes X No
Source of the Upset/Spill/Bypass (Location or Treatment Unit):
At approximately 08:53 am on Friday, June 141h, a 3rd party contractor inadvertently struck a powerfeed from
Unit 1 at Duke Energy's Roxboro Steam Station causing a power failure to the pump in the water redirect
collection sump. The water redirect sump collects various process wastewaters from the steam station, such
as cooling tower blowdown and facility wash water. These process waters are directed to a Lined Retention
Basin, LRB, for treatment and discharge to the heated water discharge canal which discharges to Hyco
Reservoir through Roxboro Steam Station's NPDES permitted outfall 003. The power failure caused the
collection sump to begin overflowing into the heated water discharge canal bypassing treatment in the LRB at
approximately 10:00 am.

WWTP Upset, Spill, or Bypass 5 r Reporting Form
Page 2
Cause or Reason for the Upset/Spill/Bypass:
A contractor inadvertently struck a power feed from Unit 1 at Duke Energy's Roxboro Steam Station causing
a power failure to the pump in the water redirect collection sump.
Describe the Repairs Made or Actions Taken:
The Station was able to stop the overflow/bypass at approximately 2:05 pm by slowing process flows into the
water redirect sump and utilizing a vacuum truck to remove water from the sump. Power was restored to the
pump at 2:20 pm. It is estimated that approximately 12,500 gallons of untreated wastewater was discharged
into the heated water discharge canal. Given the relatively small volume of this discharge compared to the
volume of water in the canal, we do not anticipate anythreat to public health orthe environment. We also
have no reason to expect any exceedance of permit limits at Outtall 003.
Action Taken to Contain Spill, Clean Up and Remediate the Site 6f applicable):
The wastewater was discharged to an NPDES effluent channel. Cleanup was not required.
Action Taken or Proposed to be Taken to Prevent Occurrences:
The system is designed with redundant backup pumps.
Additional Comments About the Event:
24-Hour Report Made To: Division of Water Resources X Emergency Management
Contact Name: Jason Robinson Date: 6/14/19 Time: 4:30 pm
Other Agencies Notified (Health Dept, etc): NA
Person Reporting Event: Joyce Dishmon, Duke Enerqv Phone Number. 336-394-5524
Did DWR Request an Additional Written Report? X Yes No
If Yes, What Additional Information is Needed:
Jason requested a completed WWTP Upset, Spill, or Bypass 5-Day Reporting Form 1 to be
submitted to his attention via emai.

Robinson, Jason
From:
Dishmon, Joyce Martin <[e-mail]>
Sent:
Monday, June 17, 2019 3:16 PM
To:
Robinson, Jason
Cc:
Conner, Steven B; Tollie, Lori White; Howard, Robert E; Winston, Cynthia C
Subject:
[External] Roxboro Steam Electric Plant - Bypass Reporting
Attachments:
W WTP-Bypass-Rpt-Form-1-20140805-D W R-SW P-N PDES.doc
Jason,
Per our conversation on Friday, 6/14/19, at approximately 4:30 pm, I have attached a copy of the requested WWTP
Bypass/Upset Report Form-1 for your review and file. A description of the event is outlined below:
At approximately 08:53 am on Friday, June 14'h, a 31d party contractor inadvertently struck a power feed from
Unit 1 at Duke Energy's Roxboro Steam Station causing a power failure to the pump in the water redirect
collection sump. The water redirect sump collects various process wastewaters from the steam station, such
as cooling tower blowdown and facility wash water. These process waters are directed to a Lined Retention
Basin, LRB, for treatment and discharge to the heated water discharge canal which discharges to Hyco
Reservoir through Roxboro Steam Station's NPDES permitted outfall 003. The power failure caused the
collection sump to begin overflowing at approximately 10:00 am into the heated water discharge canal
bypassing treatment in the LRB. The Station was able to stop the overflow at approximately 2:05 pm by
slowing process flows to the sump and utilizing a vacuum truck to remove wastewater from the sump. Power
was restored to the pump at 2:20 pm. It is estimated that approximately 12,500 gallons of untreated
wastewater was discharged into the heated water discharge canal. Given the relatively small volume of this
discharge compared to the volume of water in the canal, we do not anticipate any threat to public health or the
environment. We also have no reason to expect any exceedance of permit limits at Outfall 003.
Please let me know if you have questions/comments or need additional information
Regards,
Joyce Dishmon
Permitting and Compliance, Carolinas
Office: 336-623-0238
Cell: 336-394-5524
Email: [e-mail]

GROUNDWATER CIU41T'7 MONITORING
COMPLIANCE REPOT M
FACILITY INFORMATION pease Print Clearly or Type
Facility Name: Roxboro Steam Elettric Plant
Permit Name (d different): Duke Energy Progresa, LLC
Facility Address: 1700 Dundawi y Road
15trem)
Semora County Perzon
(Cr,) (Stare) (zip)
Contact Person: Kim Witt T ephoneK 336-215A576
Well Wcation/Site Name: Roxboro Ash Pond Wells No. of wells to be sampled: 8
(from Permit)
Monitoring Well Co
Units
CW-1
CW-2
CW-2D
CW-3
CW-3D
CW.4
Well Depth IN below land surface]
it
39.75
17,50
29.90
11.40
4650
39.00
Measuring Point(toc) (X above land surfacel
it
2.47
2.86
2.45
3.33
3.49
2.39
Well Diameter
in
2.0
2.0
2.0
2.0
2.0
2.0
Screen Top [ft below land surface]
it
19.95
7.70
25.10
3.40
41.70
24.20
soeen Sonom [X below land surface]
it
39.75
17.50
29.90
11.40
46.50
39.00
Relative Measuring Point Elevation
X
508.24
424.60
424.60
45179 1
451.61
479.65
Sampiinglakim at
CHECK IF DRY WELL AT TIME OF SAMPLING
❑DRY
❑oRy
❑MY
❑DRY
❑MY
DRY
1SA-2L
Units
CW-1
0011-2
CW-2D
ON-3
CW-3D
CW.4
Sample Date
04/24/2019
04/24/2019
04/24/2019
04/24/2019
04/24/2019
04/23/2019
Volume of Waterumed/bailed
gat
0.50
0.50
0.75
1.00
0.40
3.00
Temperature (MID)
deg. C
24.0
17.0
18.0
14.0
1&0
17.0
Odor(00085)
SuNur
M.
None
None
None
None
Appearance
❑e.
Clear
Clear
Clear
Gear
clew
Turbidity182078)
NTU
6.6
2.7
1.9
5.8
1.8
9.9
Dissolved Oxyen(00i
m L
0.25
0.21
2.79
0.3
5.1
016
Oxidation Reduction Potential(013(1
mV
24
-53
30
107
111
27
Specific Cond - field 100094)
umhos/tsn
698
95211
655
O83
566
595
Water Level[X below measuring pt.] 1925")
X
17.84
I2A
]243
4.23
L1fi
28.35
PH -field 00400
6.5-8.5
5U
5.8
6.4
6,5
5.6
7.2
6.A
14bw~
Laboratory Name
Sample Analysis Date
Duke Energy Analytical laboratory
April 24 - 30, 2019
IMACs
15A-1L
Units
CW-1
CW.2
CW-20
CW-3
CW-30
CWA
TOS- Total Diss. Solids(70300)
500
m9A
480
540
420
290
360
360
G- Chloride (00940)
Z50
mg/I
11
30
16
61
27
27
As-Arxnic(01002)
10
ug/I
<1
<1
<1
<3
<1
<1
SOC-Sulfate(009451
250
owl
96
49
120
52
33
37
Nitrate N031 as N (00620)
10
m{/I
<0.046
CIAS
0.37
0.04
4.023
0.32
Cd - Cadmium (01027)
2
u1/1
<1
<3
<3
<1
<1
<1
Cr- Chromium(01034)
10
ug/I
b
<5
b
d
<5
<5
Ca - Copper 1010421
1
mg/I
4.005
<0.005
<0.005
4.005
4.DGS
4.005
Fe-Iron(01045)
300
ug/I
33
46S
<30
M
<10
76
HIS -Mercury 171900)
1
u
<0.05
4.05
<O.05
ADS
<0.05
4.05
Man -Mumgm x(01055)
so
ug/I
SS
515
<5
in
27
b
Ni - Nickel (01067)
too
u914
b
<5
<5
<5
b
b
Pit - Lead (BIDS1)
is
u&A
<1
<3
<1
<1
<1
<1
Zn - Zinc 010921
1
mgQ
4.D05
<0.005
<0405
4.005
4.005
<0.005
Ba- Barium [01007)
700
USA
143
Its
153
105
44
130
B- Boron (01022)
700
ug/I
b0
b0
<50
b0
60
b0
TI- Thallium 1010591
0.2
NE
ug/I
<01
4.2
4.2
4.2
<0.2
4.2
Sb-Antimony(01097)
1
ME
ui
<1
<1
<3
<1
<1
<3
Se - Selenium (01147)
20
ug/I
<1
<I
<1
<S
<1
<1
Alkalinity -(00410)
NE
.611
258
387
201
97.7
230
229
AI- Aluminum(0110S)
NE
ug/I
<10
161
<10
637
<10
116
Be- Beryllium (01012)
4
NE
ug/I
<1
<1
<3
<1
<1
<3
HCO3- Bicarbonate(00440)
1
258
387
201
97.7
23p
ZZ9
Ca-Caidum(01I
49.8
52.2
47.6
310
75A
42.7
CO3- Carbonate(00445)
I
b
b
b
<5
b
d
Co - Cobak (01037)
1
<1
<1
<1
<1
<1
<1
Mg -Ma esium(00927)
1
21.7
39.6
37.9
18.8
18.8
26.3
Mo- Molybdenum(03062)
I
RNEugn
<I
<I
<I
<1
2.56
5."
K- Potassium(00937)
2,73
IA3
2.63
3.41
4,23
411
Na- Sodium (920351
I
77.3
96.6
37.2
32.0
19.1
"A
TSS - Total Saw. Sofids 70031)
b
<5
b
b
b
b
V- Vanadium(01097)
0.31
18
14.2
13.0
2.12
202
237
A- Strontium(01082)
I
0.512
OA59
0320
0.28]
0.ZH5
0.192
urn:
NE - No<EsnbinnM BOLD values equal or exceed the corresponding 2L standard qwn wn:1-c
a 1.clr r-Ir .,nv mm�aN �: neie
I cerfify that, to Me b �sl of my Knowledge and �Ixef Me infionnziti,, �6'1'710'F is tme accurate, and c, hiplele, and that Me labori analytical
and mripinsorment to �Jurfiowing violations,
77777 7i' c.P.L.
Permittee (or ADMoriaed Agent) Name and Tide- Nease print or, type
GW-59CCR 09/2015 'The IMACs were issued in 2010,2011, and 2012; however NCDEO has not established a 21. for hese constituents as described In ISAN
'Alkalinity, Bicarbonate, and Carbonate were subcontracted by Duke Energy Analytical Laboratory to Pace Analytical Services, LLC in Hu

Mail
and 1 Of WATER QUAILITIF - INFORMATION PR0aSsING UNIT
TYPE OF PERAVITTED OPERATION BEING MONITORED Mah Intto.morarmt
-action Infcontuation
Weli ID Number (From Permit)
19.50
o ■
■
©�������:il
Cdf]7�3�SiTiY1�1411tK'-�
3 approved meth, sby a DWQ- rtfied labo'A'>-; n; '-' -y :'-.;- _i ^,;!i ng false informa!bn rJudmo tce possibdiN of fines
Oi L.0101([l. For tN6 reason. IMACs noted On fhe repms ere for reference only.
rsuille, NC

State of North Carolina
Wam. a....... Department of Environmental Quality
a Division of Water Resources
EDMR REGISTRATION FORM
NC Dept of Environmental Quality
Part A. PERMIT/FACIUTY INFORMATION
1. NPDES Permit Number: N I C 10 10 10 13 14 12 15 1
APR 16 206
2. Owner/Organization Name: Duke Energy
3. Facility Name:
Roxboro Steam Electric Plant C1g egtona Office
4. Facility's Physical Address: 1700 Dunnaway Road
City: Sera State: NC
Part B. OWNER USER INFORMATION
1. Responsible Official's Name: Steve Immel
(Owner or duly authorized representative)
2. Mailing Address: 526 South Church Street
r:_.. Charlotte c _ -. NC
3. Telephone Number: 980-272-8182
4. Email Address: steve.immet®duke-onergy.com
5. User ID (Assigned by NCOWR eDMR Administrator):
PartC. USER ACCOUNT INFORMATION
1. Facility Administrator Permission
Zip Code: 273343
26202
Title: VP Carolinas Coal Generation
The Facility Administrator user permission can be assigned at the time of registration by the NCDWR
eDMR Administrator. If someone other than the Owner will be responsible for managing facility users
within eDMR and you would like the Division to set up the permission at the time of registration, then
please provide the user details for the individual who will need the Facility Administrator user permission.
Note: !f this person will be responsible forsubmitting eDMR reports, then you will also need to request
Submitter permission for this user.
In addition to the user details, please specify the permit number(s) to which the user will be associated. If
additional space is needed, please make additional copies of the Facility Administrator User Details and
complete as needed.
Facility Admtnistrator User Details
Permit NO. (s):
NCOD03425
First Name:
Robert
Middle Name:
Last Name:
Howard
Phone Number
3365984077
Email:
robert.howard&ukeanergy.com
User ID:
PzVned by DMeDMR Adm/nhovror
NC eDMR Registration Form (Revision 4.1)

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2. Submitter Permission
Provide the users, in addition to the Owner, who will need Submitter permission. The Submitter user
permission can only be assigned by the NCDWR eDMR Administrator. The Owner specified above will be
given full eDMR permissions including Submitter permission.
In addition to the user details, please specify the permit(s) to which each user will be associated for eDMR
submittal. Should additional space be needed for users and/or permits, please make additional copies of
this page and complete as needed.
NOTE: The Owner will be responsible for creating all facility users except those with Submitter permissions.
In addition to the Owner and Submitter user groups, there are four user types identified by user
permission level: Facility Administrator, Certifier, Data Entry and View Only.
The Owner and Facility Administrator will have the ability to create and manage facility users. The
Facility User Management Guide, located on the eDMR User Documentation web page, provides the
appropriate procedures for facility user management.
Submitter User Details
Permit No. (s): NC0003425
Rrst Name: Ton
Middle Name:
Last Name: Copoto
Phone Number. 336-597.6101
Email: tom. oopolo@duk"nergy cam User ID-. I (Assioned by DWR eDMR Adminkbvtor)
NC eDMR Registration Fonn (Revision 4.1) 2

RESPONSIBLE OFFICIAL AUTHORIZATION
The Responsible Official, as identified in accordance with Part 11, Section B.11 of the Standard Conditions for
NPDES Permits and 40 CFR 122.22, is the appropriate individual with the authority to sign applications or reports
for the Owner/Organization.
1, StBVe Invw (printed name), have the authority to make this request for
Dwro EnOWMOXbM seam Electric wm (Owner/Organization Name).
REGISTRATION CERTIFICATION
For the permit(s) associated with the Owner identified above, I request permission to submit DMR data using the
NCD W R eDMR system.
I understand that electronic submittal of the DMR does not fully satisfy US EPA's electronic signature
requirements and as a result, I understand I will be required to print, sign, and submit hardcopies (one signed
original and a copy) of the eDMR to NCDWR under the same reporting requirements as paper -based DMRs as
specified in Part II, Condition D (2) of the NPDES Permit.
I agree to protect the security of my user ID and password from compromise and shall take all necessary steps to
prevent its loss, disclosure, modification, or unauthorized use.
Steve Immel VP Carolinas Coal Generation
Owner/Responsible Official Name (type or print) Official Title (type or print)
Owner esponsible Official Signature Date
North Carolina General Statute 4143-215.68 provides that:
Any person who knowingly makes any fake statement, representation, or certification in any application, record, report,
plan, or other document filed or required to be maintained under this Article or a rule Implementing this Article; or who
knowingly makes a false statement of a material fact in a rulemaking proceeding or contested case under this Article; or who
falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method required to be
operated or maintained under this Article or rules of the Commission implementing this Article, shall be guilty of a Class 2
misdemeanor which may include a fine not to exceed ten thousand dollars ($10,000). 18 U.S.C. Section 1001 provides a
punishment by a fine or imprisonment not more than 5 years, or both, for a similar offense.
NC eDMR Registration Form (Revision 4.1)

4� DUKE
ENERGY.
PROGRESS
File: 12520 B
NO Dept of Environmental Quality
Ms. Julie Grzyb
Division of Water Resources
Water Quality Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
APR 1 B 2019
Raleigh Regional Office
Duke Energy Progress, LLC.
Roxkom Steam Elearie Plant
1700 Dunnm Road
Semora. NC 27343
April 2, 2019
Subject: Revision to Delegations of Authority for Duke Energy Progress, LLC, NC NPDES-Permitted
Facility -Roxboro Steam Electric Plant
Dear Ms. Grzyb:
Duke Energy Progress, LLC, submits this correspondence as a revision to documentation for your records
of responsible corporate officers ("Responsible Officials") and designation of duly authorized
representatives ("Delegated Authorities") for the NPDES-Permit for the Roxboro Steam Electric Plant.
We are requesting that Jason Haynes be removed as the Responsible Official and be replaced with Tom
Copolo. We appreciate the timely update of the Division of Water Resources database to reflect this
information so that we may begin submitting Discharge Monitoring Reports (DMRs), as required by our
permit, in NCDEQ's eDMR system. No other changes are needed at this time.
Duke Energy
NPDES Permit
Responsible Official
Progress LLC
Number
Name - Title
Roxboro Steam
NC0003423
Tom Copolo -
Electric Plant
GM 11 Regulated Generation
If you have any questions regarding these designations, please do not hesitate to contact Mr. Robert
Howard at [phone] or via email at [e-mail].
Sincerely,
Steve Immel, VP
Carolinas Coal Generation
Attachment: eDMR Registration forms
cc: Raleigh Regional Office - NCDEQ
eDMR Registration

DUKE
ENERGY.
PROGRESS
bc: Mr. Ryan Enoch
Mr. Lori Tollie
Mr. Amber Sarver
Mr. Robert Howard
Mr. Don Safrit
Duke EMW PeogrM LLC
Roxbom S1eme Ekmic P&W
1700 Duwaway Road
Semom NC 27343

Manuel, Vanessa
From: Howard, Robert E <Robert.Howard @duke-energy.com>
Sent: Tuesday, April 02, 2019 2:02 PM
To: Manuel, Vanessa
Cc: Kinney, Maureen
Subject: [External] RE: Roxboro Steam Electric Power Plant, NC0003425 - Removing Designated
Operators
Maureen, Please remove the below referenced back up ORCs listed below from the Duke Energy Roxboro Steam Electric
plant. Contact me if any additional forms are needed to complete this action.
Thanks
Robert E. Howard
Lead EHS Professional
Environmental Field Support
Roxboro Steam Plant
336-203-2875
DUKE
MRGY.
From: Manuel, Vanessa [mailto:[e-mail]]
Sent: Thursday, February 21, 2019 12:40 PM
To: Enoch, Ryan S. < Ryan. Enoch @duke-energy.com>; Howard, Robert E <[e-mail]>; Tollie,
Lori White <[e-mail]>; Sarver, Amber Michelle <[e-mail]>
Cc: Kinney, Maureen <[e-mail]>
Subject: Roxboro Steam Electric Power Plant, NC0003425 - Removing Designated Operators
*** Exercise caution. This is an EXTERNAL email. DO NOT open
attachments or click links from unknown senders or unexpected
email. ***
All —
During the recent NPDES inspection, you indicated the individuals listed below were no longer designated backup
operators at the plant. To update this information in the Division's data system, someone with the organization will
need to send an email to Maureen Kinney with the Operators Certification unit (she is copied on this email) or complete
the online Operator Designation - Expiration/Resignation Form. See link below to access the form. If you have any
questions, please feel free to contact me.

Link to form: https://deg.nc.gov/about/ pns/water-resources/operator-certifica_.-.., wastewater-operator-
certification/wastewater-operator-certification-downloads
Designated Backup Operators no longer with Roxboro Steam Electric Power Plant (NC0003425):
1. Ronald D. Easley
2. Dana Hill Newcomb
3. Eric Daniel Satterwhite
Maureen, during the inspection, it was noted that a name correction for an existing backup operator is needed in the
Operator Certification data system. Amber Michelle Ramey needs to be updated to Amber Michelle Sarver. If Amber
needs to provide additional information to you or complete a specific form, please let me know. Thanks.
Vanessa E. Manuel
Environmental Program Consultant
Division of Water Resources — Raleigh Regional Office
Department of Environmental Quality
919 7914255 office
vanessa. man uel(c?ncdenr.00v
Physical: 3800 Barrett Drive, Raleigh, NC 27609
Mailing: 1628 Mail Service Center, Raleigh, NC 27699-1628
!'"Nothing Compares
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

Manuel, Vanessa
From:
Sent:
To:
Subject:
Attachments:
xternal emai
MMEWmffn:ov
Hi Vanessa,
Tollie, Lori White <[e-mail]>
Monday, March 25, 2019 8:49 AM
Manuel, Vanessa
(External] Roxboro Steam Station Submerged Flight Conveyor Startup
Roxboro SFC startup Letter 03_2019.pdf A(000 0 3 42 S
The attached letter was mailed to DEQ on Friday to document the completion of construction and startup of the
submerged flight conveyor (SFC) at Roxboro. The SFC will handle bottom ash as we continue to remove flows from the
ash basin and reroute them to the new lined retention basin. I will be happy to mail you a hard copy also if you would
like. Thank you.
Duke Energy
EHS CCP Permitting & Compliance
2500 Fairfax Road
Greensboro, NC 27407
Cell: [phone]
Office: [phone]

DUKE
ENERGY
March 21, 2019
Mr. Jeff Poupart, Section Chief
NC DWR Permitting Section
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Installation of Submerged Flight Conveyer
Roxboro Steam Station
Permit #NC0003425
Person County
Dear Mr. Poupart:
Duke Energy
EHS CCP Environmental Programs
411 Fayetteville St, 15th Floor
Raleigh NC 27601-1849
In accordance with requirements found in state and federal laws, Duke Energy is re-routing bottom ash
sluice wastewaters away from ash basins. To continue to handle these wastestreams, Roxboro Steam Station is
installing a Submerged Flight Conveyer (SFC) for the dry handling of bottom ash. This change was
communicated to your office as part of the pending NPDES permit application dated August 15, 2016. The
installation of the new SFC will be completed in this month. This letter is intended to provide notification of the
process startup and redirection of the wastewater prior to receipt of final NPDES permit. This is consistent with
guidance received by our staff on January 3, 2018 from Sergei Chernikov.
Bottom ash from the boilers will be collected in water filled troughs for transfer to the SFC to direct the bottom ash
wastewater away from the ash basin. Overflow water from the SFC trough is captured, cooled, and recirculated.
The SFC is designed with a blowdown system for the overflow water to be discharged to the Flu -Gas
Desulfnization wastewater treatment system (FGD WWTS) as needed. Federal Effluent Limitation Guidelines
(ELGs) contain allowance to route bottom ash transport water overflows from the SFC to the FGD WWTS.
Additionally, small, incidental flows from the SFC may be sent to the ash basin or Lined Retention basin (once in
service). The FGD WWTS discharges to NPDES internal outfall 010, then to the west ash basin internal outfall
002, finally discharging to NPDES outfall 003.
In conclusion, the startup of the SFC will decrease the pollutant load and flow volumes of the ash basin discharge.
The startup of the SFC is a necessary step in the process or re -directing process wastewater flows away from the ash
basin as we proceed with activities to comply with various statutory requirements. It is our understanding from
previous discussions with your staff that no additional approvals are necessary beyond this notification.
If there are any questions about this matter, please Lori Tollie at [phone].
Sincerely,
Lori Tollie
Senior Environmental Specialist
cc: Sergei Chemikov—NC DWR 1617 Mail Service Center Raleigh, NC 27699-1617
Shannon Langley - via email
Richard Baker - via email
Julie Grzyb — NC DWR 1617 Mail Service Center Raleigh, NC 27699-1617

�? DUKE
ENERGY,
March 14, 2019
Ms. Sheila Holman
Assistant Secretary
NC Department of Environmental Quality
217 West Jones Street
Raleigh NC 27603
RE: Startup of treatment components
Internal process flow modifications
Roxboro Steam Electric Plant
NC0003425
Person County
Dear Assistant Secretary Holman,
Paul Draovitch, P.E.
Senior Vice President
Environmental, Health 8 Safety
526 S. Church Street
Mail Code. EC3XP
Charlotte, NC 28202
[phone]
XC Dept of Environmental Quality
Raleigh Regional Office
This letter is to provide details about the forthcoming startup of required treatment components
at the subject facility. Between the date of this letter and April 12, Duke Energy intends to
complete final commissioning of the newly constructed Lined Retention Basin ("LRB"), divert
certain waste streams from the ash basin to the LRB, and begin discharging from the LRB to
wastewater treatment system upstream of Outfall 003. It is our understanding, based on
language in the existing NPDES permit and on previous discussions with you and your staff,
that these changes can be implemented without a new or modified permit because they are
internal to the system and do not materially affect the quality of the water discharged.
In accordance with the North Carolina Coal Ash Management Act's mandate to discontinue the
use of ash basins for wastewater treatment and a comparable requirement in the Federal CCR
Rule, Duke Energy has constructed replacement treatment systems for low volume waste and
other wastestreams that will continue to be generated in the future. These replacement
systems, commonly called "Lined Retention basins" or "LRB's" were constructed to replace ash
basins at sites that will remain active and generate electricity using coal as a fuel source.
Discharges from LRBs have been included in NPDES permits recently issued for other Duke
Energy generating stations where LRB replacement treatment for ash basins has been
constructed. The LRB replacement treatment system at the Roxboro station is nearing
completion of construction and will be ready for commissioning and use very soon.
As previously shared with your office, Duke must cease all flows into the existing ash basin at
the Roxboro plant by April 12 to comply with requirements in the Federal CCR rule. To comply
kith this requirement, Duke must complete commissioning of the Roxboro LRB and divert
remaining waste streams from the ash basin to the LRB. Duke intends to undertake the
following activities at Roxboro to begin use of the new LRB and discontinue sending flows to the
ash basin under the existing permit.
Final commissioning of the LRB system components will be undertaken using service
water. Service water is water withdrawn from Hyco reservoir.

Ms. Sheila Holman
March 14, 2019
Page 2
2. After final construction checks using service water, Duke intends to redirect influent
flows from the ash basin to the LRB and place the LRB into service at Roxboro. For
clarity, this LRB system will only receive flows that previously were directed to the ash
basin and no new flows are included. Some flows have been removed (e.g. routine
bottom ash sluice waters) but no new sources of wastewater are present that were not
previously directed to the respective sites ash basins for treatment.
3. Flows from the LRB at Roxboro will be reintroduced into the wastewater flow path prior
to outfall 003 to the Hyco reservoir. The internal outfall has been constructed and
includes a diffuser system to assure rapid and complete mixing with other wastestreams
prior to discharge. As the flows at Roxboro, will not commingle solely with flows from the
existing ash basin before being commingled with cooling water flows, Duke will sample
the Roxboro LRB to demonstrate that discharges from the system meet Steam Electric
Effluent Guidelines for TSS and Oil and Grease. Duke will also sample the LRB
discharge for all constituents required to be sampled for the ash basin in our NPDES
permit. These internal sample results will be reported as an attachment to our monthly
required NPDES Discharge Monitoring report.
Duke Energy appreciates your agency's assistance as we have completed an unprecedented
amount of modifications at our coal fired facility's over the last few years. The compliance
deadlines associated with the North Carolina Coal Ash Management Act and Federal CCR rule
have been aggressive and required significant effort and expenditures comply with. Duke
Energy is focused on safely closing ash basins in ways that are dictated by science and
engineering and the work described in this submittal is being undertaken with that common goal
in mind.
Duke Energy hereby requests your concurrence with this action with the understanding
that this action is being undertaken under the conditions of the existing permit and is not
intended in any way to be binding on future permitting decisions or terms currently
under review by the Department.
If there are any questions about this matter, please contact Mr. Shannon Langley at (919) 546-
Senic
Duke Energy

Ms. Sheila Holman
March 14, 2019
Page 3
Cc: RRO DEQ WQ Supervisor
3800 Barrett Drive
Raleigh, NC 27609
Jeff Poupart — DWQ Section Chief
1617 Mail Service center
Raleigh, NC 27699-1617
Shannon Langley —via email
Lori Tollie - via email

Manuel, Vanessa
From: Tollie, Lori White <[e-mail]>
Sent: Thursday, March 07, 2019 2:12 PM
To: Manuel, Vanessa; Howard, Robert E; Sarver, Amber Michelle; Enoch, Ryan S.
Subject: [External] Roxboro Compliance Evaluation Inspection outfall 003
Attachments: GoogleEarth Imagejpg; Compliance Evaluation Inspection Roxboro NPDES Permit
NC0003425.pdf
�E�SJnf Cvr�..7
Vanessa,
This email is a follow up to the voicemail I left for you earlier today concerning the sampling location for NPDES outfall
003 at the Roxboro Station. I have included a Google Earth image of Duke's proposed new location for reference. The
Roxboro station will be placing a new floating dock/sampling station on the East side of the fence at outfall 003 rather
than request the sampling location be changed. We realize that the sampling location needs to be safe, accessible, and
be representative of the wastewater after all treatment but prior to discharge to the reservoir. We feel that this new
location will achieve these requirements. Please let me know if I can answer any questions or if we need to discuss
further. I can provide a latitude and longitude on the new sampling location to your office and to the Complex
permitting unit after completion. Thank you.
X�nAr.Yf&
Duke Energy
EHS CCP Permitting & Compliance
2500 Fairfax Road
Greensboro, NC 27407
Cell: [phone]
Office: [phone]

DG �!! 003

EA
OOPER
EL S. REGAN
Secretary
LINDA CULPEPPER
Director
Paul Draovitch, Senior VP
Duke Energy Progress, LLC
526 S Church Street — Ec3xp
Charlotte, NC 28202
NORTH CAROLINA
Environmental Quality
February 25, 2019
Subject: Compliance Evaluation Inspection
Roxboro Steam Electric Power Plant
NPDES Permit NC0003425
Person County
Dear Mr. Draovitch:
r'! r- J
a
Z -ZT^rq
On Tuesday, February 19, 2019, Vanessa Manuel of the Raleigh Regional Office conducted a
compliance evaluation inspection of the treatment facilities located at the Roxboro Steam
Electric Power Plant. The purpose of this inspection was to ensure compliance with the subject
NPDES permit. During the inspection, the presence and cooperation of Ryan Enoch, Operator in
Responsible Charge (ORC), Amber Sarver and Robert Howard, Backup ORCs, and Lori Tollie
were helpful and appreciated.
The Roxboro Steam Electric Power Plant is located at 1700 Dunnaway Road in Semora, North
Carolina. The facility has both a Grade II Biological Water Pollution Control System with an as -
built and permitted flow of 0.015 MGD that treats domestic wastewater, and a Grade I
Physical/Chemical Water Pollution Control System that treats industrial wastewater. Through
NPDES permit NC0003425, Duke Energy Progress, hereinafter referred to as Duke Energy, is
authorized to discharge the treated wastewater through outfalls 003 and 006 to receiving waters
designated as Hyco Lake, a waterbody classified as WS-V and B waters within the Roanoke
River Basin.
This NPDES compliance evaluation inspection consisted of the following:
• Review of the NPDES permit;
• Review of the owner/facility information;
• Review of December 2016 — November 2018 monitoring data;
• Review of December 2016 — November 2018 compliance history;
• On -site inspection of the laboratory and wastewater treatment units; and
• On -site inspection of the discharge outfalls.
cr,e­ D;.� Q
North Carolina Department of Environmental Quality I Division of Water Resources
Raleigh Regional Office 1 3800 Barrett Drive I Raleigh. North Carolina 27609
919.791.4200

If }
Duke Energy Progress, NPDES Permit NCO003425
February 25, 2019
Page 2 of 3
Findings during the pre -inspection file review were as follows:
1. The current NPDES permit was issued effective May 1, 2007, modified effective June 10,
2009, and expired March 31, 2012. On September 28, 2011, the Division received Duke
Energy's permit renewal application for the Roxboro Steam Electric Power Plant. The
Division is in the process of renewing this NPDES permit.
2. As listed in the subject pen -nit, the treatment systems include the Ash Pond Treatment
System (Internal Outfall 002), Heated Water Discharge Canal System (Outfall 003), Cooling
Tower Blowdown System (Internal Outfall 005), Coal Pile Runoff Treatment System
(Outfall 006), Domestic Wastewater Treatment System (Internal Outfall 008), Chemical
Metal Cleaning Treatment System (Internal Outfall 009), and Flue Gas Desulfurization
Treatment System (Internal Outfall 010).
3. Beginning December 21, 2016, EPA's NPDES Electronic Reporting Rule requires permittees
to submit their discharge monitoring reports (DMRs) electronically, instead of on paper.
Duke Energy has been using the Division's eDMR system to electronically report the subject
facility's monitoring data beginning with its November 2016 DMR. To learn more about the
eDMR system, please visit the Division's eDMR website at
httos://deq.nc.poN"about/divisions/water-resources/edmr.
4. For the review period December 2016 through November 2018, the following violation was
detected: Total Suspended Solids daily maximum limit exceeded on October 10, 2018. The
Division issued a Notice of Violation for this violation. No penalty assessments have been
issued during the period of review. For the 2-year period ending November 2018, Duke
Energy has been compliant with its Whole Effluent Toxicity limit and monitoring
requirements.
Findings during the inspection were as follows:
5. The operator's log and supporting analytical documentation were consistent and up to date.
6. The Roxboro Steam Electric Power Plant on -site laboratory is field certified for and self -
reports monitoring data for the following parameters (certification number 5080): pH and
temperature. Duke Energy uses its off -site environmental laboratory, Duke Analytical Lab
(certification number 248), to analyze the remaining parameters required by the permit.
Samples analyzed off -site are stored in the sample storage refrigerator until transported off -
site. The inspector observed the temperature of the refrigerator at 3.1 degrees Celsius, which
is in compliance with the requirements of proper temperature for sample storage. The
inspector reviewed the sample storage temperature logs, pH meter calibration logs and
standards, and found these items to be compliant with record -keeping requirements. The in-
house thermometers are NIST certified and replaced annually.
7. The inspector compared the February 2018 DMR data against the labs' analytical results. No
discrepancies were noted. A review of the associated chain -of -custody forms showed
documentation complete and compliant with record -keeping requirements.

Duke Energy Progress, NPDES Permit NC0003425
February 25, 2019
Page 3 of 3
8. The inspector observed all outfalls during the inspection. For Outfal1003, the NPDES permit
requires the permittee to perform the effluent sampling on the discharge canal at the point of
discharge into Hyco Lake. Duke Energy has installed a fence that spans the length of the
discharge canal and separates the Heated Water Discharge Canal System from Hyco Lake.
The operators monitor temperature continuously from a thermometer mounted on the fence
and submerged into the effluent discharge. Samples for the remaining effluent parameters
are taken from the dock over Hyco Lake approximately 15-feet from the effluent discharge,
which may not meet the sampling location requirements of the NPDES permit. As the
inspector discussed with Lori Tollie, Duke Energy should contact the Division's NPDES
Permitting Unit and discuss the possibility of changing the sampling location for Outfall
003. No other compliance issues were observed at the time of the inspection.
9. All domestic wastewater is treated by a package treatment plant with chlorine tablet
disinfection. The effluent from the package plant goes to the Ash Pond Treatment System.
No issues of concern were observed with the package treatment plant.
If you have questions or comments about the inspection, this report or the requirements to take
corrective action (if applicable), please contact Vanessa Manuel at 919-791-4255 or via email at
Vanessa. Manuel Camcdenr. eov.
Sincerely,
Rick Bolich, L.G., Assistant Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Attachments: EPA Water Compliance Inspection Report
Cc: RRO/SWPFiles
Laserfiche

U.1ad States Environmemal Protection Agency
Form Approved.
EPA Washington. D C. 20460
OM6 No. 2040-0057
Water Compliance Inspection Report
Approval expires 6-31-98
Section A: National Data System Coding (i.e., PCs)
Transaction Code NPDES yr/mo/day Inspection Type
Inspector Fac Type
1 I„ I 2 IS I 3 I N00003425 I11 12 19,02/19 17 18 L]
19 1 � I 201 I
211 1 1 I1 11 I1II III II I I I I I 111111111
11I26
Inspection Work Days Facility Self -Monitoring Evaluation Rating B 1 CA
Reserved
70 LJ 71 I 72 r 73I 74 75L I I I80
67 L ..... .... j
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
Entry Time/Date
Permit Effective Date
POTW name and NPDES permit Number)
10:05AM 19/02/19
09/07/01
Roxboro Steam Electric Power Plant
Exit Time/Date
Permit Expiration Data
1700 Dunnaway Rd
Senor NC 27343
01 05PM 19/02119
1203/31
Name(s) of Onsite Repreaentative(syrndes(s)/Phone and Fax Numbers)
Omer Facility Data
Ryan Stephen Enoch/ORC/336-598-7609/
Name, Address of Responsible Of6cial/Ti9e/Phone and Fax Number
Je So ( y-y'les r rile-'i .•fav"." kr-' .
Contacted
M,N9mr7'Rrarker,1700 Dunnaway Rd Semora NC 27343/Plant
Manager/336-597.6101/ Yes
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit Operations & Maintenance Records/Reports Self -Monitoring Program
Facility Site Review EfftuenVReceiving Waters Laboratory
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(e) of Inspector(s) Agency/Office/Phone and Fax Numbers
Date
Vanessa E Manuel RRO WO//B10 087699V
�.
7—i9
9i9-f9/-4153
�20,
Signature of Ma agement 0 A Reviewer Agency/ORcs/Phone and Fax Numbers
D to
�I
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Pageli

NPDES yr/mo/day Inspection Type
N00003425 121 19/02119 17 18 I C I
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checidists as necessary)
See attached inspection report.
Page#

Permit.- NC0003425 Owner - Facility: Roxboro Steam Electric Power Plant
Inspection Date: 02/19/2019 Inspection Type: Compliance Evaluation
Permit
Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new
0
❑
❑
❑
application?
Is the facility as described in the permit?
❑
❑
❑
# Are there any special conditions for the permit?
0
❑
❑
❑
Is access to the plant site restricted to the general public?
0
❑
❑
❑
Is the inspector granted access to all areas for inspection?
M
❑
❑
❑
Comment: The current NPDES permit expired on March 31 2012. The Division received the
oermittee's renewal application on September 28, 2011.
Record Keeoina
Yes
No NA NE
Are records kept and maintained as required by the permit?
0
❑
❑
❑
Is all required information readily available, complete and current?
0
❑
❑
❑
Are all records maintained for 3 years (lab. reg. required 5 years)?
0
❑
❑
❑
Are analytical results consistent with data reported on DMRs?
0
❑
❑
❑
Is the chain -of -custody complete?
M
❑
❑
❑
Dates, times and location of sampling
Name of individual performing the sampling
Results of analysis and calibration
Dates of analysis
Name of person performing analyses
Transported COCs
Are DMRS complete: do they include all permit parameters?
0
❑
❑
❑
Has the facility submitted its annual compliance report to users and DWQ?
❑
❑
M
❑
(If the facility is = or > 5 MGD permitted Flow) Do they operate 24n with a certified operator
❑
❑
0
❑
on each shift?
Is the ORC visitation log available and current?
0
❑
❑
❑
Is the ORC certified at grade equal to or higher than the facility classification?
0
❑
❑
❑
Is the backup operator certified at one grade less or greater than the facility classification?
0
❑
❑
❑
Is a copy of the current NPDES permit available on site?
❑
❑
❑
0
Facility has copy of previous year's Annual Report on file for review?
❑
❑
M
❑
Comment: The permitted facility is classified as both a Grade II Biological Water Pollution Control
System and a Grade I Physical/Chemical Water Pollution Control System
The ORC
Ryan
Enoch, possesses valid certificates for WW-3 and PC-2 treatment systems and each
Backup ORC is certified at the appropriate type and grade for the treatment systems.
Page# 3

PermlL• NC0003425 Owner • Paclllty: Roxboro Steam Electric Power Plant
Inspection Dab: 02/192019 Inspection Type: compliance Evaluation
Laboratory
Yes No NA NE
Are field parameters performed by certified personnel or laboratory?
0
❑
❑
❑
Are all other parameters(excluding field parameters) performed by a certified lab?
M
❑
❑
❑
# Is the facility using a contract lab?
❑
0
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
M
❑
❑
❑
Celsius)?
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+f- 0.2 degrees?
❑
❑
❑
Incubator (BOD) set to 20.0 degrees Celsius +1- 1.0 degrees?
❑
❑
❑
Comment: The on -site lab is field Parameter certified (certificate # 5080) and lab personnel analyzes PH
and temperature. All other required parameters are analyzed by the permittee's off -site lab,
Duke Analytical Lab (certificate # 248).
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? M ❑ ❑ ❑
Does the facility analyze process control parameters, for exMLSS, MCRT, Settleable ❑ ❑ ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment:
Bar Screens
Type of bar screen
Yes No NA NE
a.Manual
b.Mechanical
❑
Are the bars adequately screening debris?
M
❑
❑
❑
Is the screen free of excessive debris?
0
❑
❑
❑
Is disposal of screening in compliance?
N
❑
❑
❑
Is the unit in good condition?
0
❑
❑
❑
Comment: The package wastewater treatment
plant is relatively new and treats domestice wastewater.
Secondary Clarifier
Yes No NA NE
Is the clarifier free of black and odorous wastewater?
0
❑
❑
❑
Is the site free of excessive buildup of solids in center well of circular clarifier?
❑
❑
0
❑
Are weirs level?
0
❑
❑
❑
Is the site free of weir blockage?
0
❑
❑
❑
Is the site free of evidence of short-circuiting?
0
❑
❑
❑
Is scum removal adequate?
0
❑
❑
❑
Is the site free of excessive floating sludge?
0
❑
❑
❑
Page# 4

Permit: NC0003425 Owner -Facility:
Roxboro Steam Electric Power Plant
Inspection Date: 02/19/2019 Inspection Type:
Compliance Evaluation
Secondary Clarifier
Yes No NA NE
Is the drive unit operational?
❑
❑
❑
Is the return rate acceptable (low turbulence)?
❑
❑
❑
Is the overflow Gear of excessive solids/pin floc?
❑
❑
❑
Is the sludge blanket level acceptable? (Approximately Y, of the sidewall depth)
❑
❑
❑
Comment: Part of the Package treatment plant.
Aeration Basins
Yes No NA NE
Mode of operation
Ext. Air
Type of aeration system
Diffused
Is the basin free of dead spots?
0 ❑
❑
❑
Are surface aerators and mixers operational?
❑ ❑
E
❑
Are the diffusers operational?
❑
❑
❑
Is the foam the proper color for the treatment process?
❑
❑
❑
Does the foam cover less than 25% of the basin's surface?
0 ❑
❑
❑
Is the DO level acceptable?
❑ ❑
❑
Is the DO level acceptable?(1.0 to 3.0 mg/1)
❑ ❑
❑
Comment: Part of the package treatment plant
Disinfection -Tablet
Yes No NA NE
Are tablet chlorinators operational?
❑
❑
❑
Are the tablets the proper size and type?
❑
❑
❑
Number of tubes in use?
1
Is the level of chlorine residual acceptable?
0
❑
❑
❑
Is the contact chamber free of growth, or sludge buildup?
0
❑
❑
❑
Is there chlorine residual prior to de -chlorination?
❑
❑
0
❑
Comment: De -chlorination is not used
Effluent Sampling
Yes No NA NE
Is composite sampling flow proportional?
❑
❑
0
❑
Is sample collected below all treatment units?
0
❑
❑
❑
Is proper volume collected?
❑
❑
❑
Is the tubing clean?
❑
❑
❑
E
Page# 5

Permit: NC0003425 Owner • Facility: Roxboro Steam Electric Power Plant
Inspection Date: 02,'19/2019 Inspection Type: Compliance Evaluation
Effluent Sampling Yes No NA NE
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees 0 ❑ ❑ ❑
Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type ❑ ❑ ❑
representative)?
Comment: For outfall 003 the composite sampler is set up at the time of sample collection to collect a
quarterly toxicity sample During the inspection the composite sampler was not set up
Upstream / Downstream Sampiina Yes No NA NE
Is the facility sampling performed as required by the permit (frequency, sampling type, and M ❑ ❑ ❑
sampling location)?
Comment: Stream monitorinq for temperature is performed to meet the mixing zone requirements of
Special Condition A. (12).
Effluent Pipe
Yes No NA NE
Is right of way to the outfall properly maintained?
M
❑
❑
❑
Are the receiving water free of foam other than trace amounts and other debris?
0
❑
❑
❑
If effluent (diffuser pipes are required) are they operating properly?
❑
❑
0
❑
Comment: The facility has 2 effluent outfall pipes (003 and 006) and 5 internal outfalis (002, 005, 006.
009 and 010) that eventually discharges to the heated water discharge canal system (outfall
003),
Page# 6

Inspection Age,,,, — Roxboro Steam Electric P.er Plant, NCO003425
2019Feb19
Opgning Conference
JPurpose of inspection
Flow of inspection
V Overview of plant layout (treatment components)
Per it Requirements
NPDES WW Contacts Report
J • Permit status
/• Electronic reporting -1"eDMR. November2016
• Other
Laboratory / n /
✓ • Analytical lab(s): Duke Analytical Lab (cert. # 248) • Fe4oe c v4,`/;Co( Sd�Ci
✓/• Parameters analyzed on -site PH 111'c"P; 11)� cc I" ,a..,,,eyrr rw 0-/4VI2
V • Field Parameters- Inspectors' Checklist FY * -}gyp, f
• Meter calibration logs and standards -Calibration frequency
✓• Analytical bench sheets
�/• Thermometer calibration dates) - NIST certified in-house thermometers
ZY_ C"I Ai �rh, 2CiCA it,
(LailPiper Trail - Data Comparison (LData to DMRs)
✓ • Review period:'] ec. J 2d(o-✓r� �)%3 • Selected DMRs (n=2 max.): F4.20(g
NJ �sQi5Oa..U•�-4-
Tre/a�tnent Components ORC logbook La/ ov
/
%f Treatment unit observations
Backup Generator
• Run schedule
• Auto switch on i run under load?
Flow Measurement /
• Meter calibration date 2een11 p ID 9pPt�r�� Mar (u j�Art�i 9t�
Sample Collection / K C�'`b '�*d r� 4ggU, P)n ct-,, J�t E yr SrtIeV;CF i, e/
• Composite sampler- program setup
✓• Sample storage temperature Reviews pier temperature logs
• Tubing appearance,- Kr-[ E✓�✓u� — �� ,��r+� ��f S� f
• Sample handling after collection
Receiving Waters �KE
• Appearance !l~I(o
Cling Conference
�• Findings
✓• Expectations
I I P a g e

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Z112/Z.>/-2-----
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Gxti� 6c 4a s%,Ac,,
Suk'%►cF fFYO.
Jf ob -

NC0003425 - Roxbc... steam Electric
Friday, October 12, 2018 8:12 AM
Owner / Facility Names: Duke Energy Progress LLc / Roxboro Steam Permit Number.
Electric Power Plant
Last inspection conducted: 4/27/2017 Inspector.
Note/Comment: EPA Major
Inspection Assigned(FY/QTR): FY19/Q2
Basic Facility Information
ORC: Ryan S. Enoch (WW-3 & PC-2)
Certification active
Certification inactive
No designated ORC
Note comment
J Annual feels) paid
Annual feels) overdue
Note comment
NC0003425 County: Person
Stephanie Goss
Planned Inspection Date: 2/19/2019 (10:00 am)
7 Facility Treatment Classification: Biological Water Pollution Control System (W W-2) & PC-1
As -Built Flow / Permitted Flow: 0.015 MGD / 0.015 MGD
Backup Operator(s):
Chris G. Clayton, W W-2 & PC-1 W Certification active Certification inactive
Kevin D. Clayton, W W-2 & PC-1 J Certification active [ Certification inactive
Receiving Waters Current Permit: Effective 7/1/2009 - 3/31/2012
Stream: Hyco lake _ Active, >180 days until permit expire
Classified: WS-V & B — Active, will expire within 180 days
River Basin: Roanoke Expired, renewal application received timely
Expired, renewal application overdue
Treats: 50% domestic and 50% industrial wastewater
Inspection Prep
To Dos:
Schedule inspection site vi i
Notelcomment On 21512019, scheduled site visit w/
/ ORC
ViY Review last inspection report
Review permit file
'� Generate BIMS reports: Permit Enforcement
History and MR Violations (2-yrs of data)
C✓� Pull 2-yrs. of DMRS (Dec. 2016 - Nov. 2018)
enerate NPDES WW Permit Contacts Report
Prepare inspection agenda
Enter inspection into BIMS
Prepare inspection letter/report
Renewal application received September 28, 2011
Permit reviewer.' Teresa Rodriguez (retired)
Facility Contacts:
Name Affiliation
Jason Haynes, Plant Manager Facility & Permit
Contact
Phone Number Email
336-597-6101 [e-mail]
�RyyanfS. Enncxh,, ORC 336-598-76099,,,,� [e-mail]
NPDES W W Majors Page I

North Carolina Department of Environmental Quality
Division of Water Resources
Permit Number: NC0003425
Permit Type: Industnal Process & Commercial Wastewater Discharge
Facility Name: Roxboro Steam Electric Power Plan[
Facility Addressl: 1700 Dunaway Rd
Facility Addressl:
City, State & Zip: Semora. NC 27343
Owner Information Details:
MUST submit a Change of Name/Ownership form to DWR to make any changes to this Owner information.
(Click Here for "Change of Name/Ownershio"Form)
Owner Name: Duke Energy Progress LLC
Owner Type: Non -Government Owner Type Group: Organization
*** Legally Responsible for Permit ***
(Responsible corporate officer/principle executive officer or ranking elected official/general Partner or proprietor,
or any other person with delegated signatory authority from the legally responsible person.)
Owner Affiliation: Paul Draovdch Title: & EH S Senior VP
Addressl: 526 S Church St - EQa
Addressl:
City, State & Zip: Charlotte. NC 28202
Work Phone: [phone] Fax:
Email Address: Paul Draovitch(alduke-enerov com
Owner Contact Person(s)
Contact Name rttlfl Adder Phone EM Email
Tam Copolo /Manager %ant ( 0660 Boston Rd, Roxboro, NC 27574 336-597-7307 tom.cope-e olo@duknergy.
f r✓ ff�( tz./O �C^^ Corr
Facility Contact Person(s)
Contact Name rl112 Address Phone fax Email
4' .il. Idaaagerf`IaM 1700 Dunnaway Rd, Semora, NC 336-597-6101
27343 arom—
✓lason Haynes �a vr� ,.Ar' 491 Energy Way, Hamlet, NC 28345 Jmn.haynes@duke-energy
3 l O/
Permit Contact
Contact Name rift Address Phone fag Laid
Yc •' Manager Ra^- 1700 Dunnaway Rd, Semora, NC 27343 336-597-6101 .igdy H+=rkcrrnld,ba-cnargy.
Permit Billing Contact Person(s)
Contact Name Tit g Address Phone Fpx Email
Cynthia Winston 410 S Wilmington St NCrhIS, Raleigh, 919-546-5538
NC 27601
-i- /(v k'ntey— ",)[ t cr9 y
2/5/2019 Page 1

Permit Number: NC0003425
Permit Type: Industrial Process & Commercial Wastewater Discharge
Facility Name: Roxboro Steam Electric Power Plant
Facility Addressl: 1700 Dunnaway Rd
Facility Address2:
City, State & Zip: Semora, INC 27343
Persons with Signatory Authority
Type
Contact Name
Title
Address
Phone Fax
€hill
Permit
Andy Solomon
Operations
1700 Dunnaway Rd, Semora,
336-597-6136
andy.solomon@duke-ener
Superintendent
NC 27343
gy.com
Permit
Robbie
1700 Dunnaway Rd, Semora,
336-598.4038
robbie.chamers@dukeen
Chambers
NC 27343
erpv.com
Permit
Ryan Stephen
2039 Elder Rd, Nathalie, VA
336-598-7609
ryan.enoch@dukeenergy
Enoch
24577
.Wm
2B6f8704
704=387473T
ShanneRrFaddCaBMake-ene
r(jv.com
Permit
Jason Haynes
1700 Dunnaway Rd, Semora,
NC 27343
Permit
Lucas Henderson
1700 Dunaway Rd, Semora,
NC 27343
Permit
Alan E Madewell
Dir Field Support
526 5 Church St, Charlotte, NC
alan.madewell@duke-ener
Designated Operators
if the designated operators listed below are incorrect orfro longer associated with Me collection system, the information can be updated by submitting a completed
"Operator Designation Form"(Dick Here for ORC Desmnabon Forrrrl. Please provide specific debits as to the changes requested, including the addition/removal of
designated operators. For all otlrer operator questions orissue; please call 919-807-6353.
Facility Classification: PC1
Operator Name B212 Cert Type Cart c��e.�� Cert # Effective Date
Ryan Stephen Enoch ORC PC-2 Active 1007136 T 12/13/2018
Chris G. Clayton Backup PC-1 Active 989418 C 5/23/2011
Kevin Danny Clayton
Backup
PC-1
Active
1005543
1/1/2019
Aeaald-�EasieT-
Backup
PC -I
Active
989628
2/10/2009
Robert Earl Howard
Backup
PC-1
Active
985778
2/10/2009
William Edward Milam
Backup
PC-1
Active
28546
2/10/2009
Bane-HiN-Newcemk_.,
Backup
PC-1
Active
989611
5/1 W01I
Amber Michelleµamey-, Sq ,Q l��y2
Backup
PC-1
Active
991238
1/7/2013
Backup
PC-1
Active
985810
10/1/2016
Facility Classification: lVW2
Operator Name
$pig
Cert Type
Cert Status
Cert #
Effective DafB
Ryan Stephen Enoch
ORC
WW-3
Active
1004802
1/1/2019
Chris G. Clayton
Backup
W W-2
Active
985915
5/18/2016
Kevin Danny Clayton
Backup
WW-2
Active
1006784
1/1/2019
Robert Ead Howard
Backup
W W-2
Active
13403
5/18/2016
William Edward Milam Backup WW-2 Active 23490 5/18/2016
Amber Michelle P." Backup WW-2 Active 992112 5/18/2016
Backup WW-3. Active 989354 10/1/2016
Derrick Antonio Smith Backup WW-3 Active 1005215 9/14/2017
2/5/2019
Papa 2

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r C" 1:') 7p-C ��"� / t laO �t rr /J �,- L boi--Jde%tz,� SY� K-• -
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MONITORING REPORT(MR) VIOLATIONS for: Report Date02/12/19 Page: 1 of 1
Permit: nc0003425 MRS Between 12 - 2016 and 11 - 2018 Region: Raleigh Violation Category:% Program Category: NPDES Vvw
Facility Name' % Param Name % County: % Subbasin: % Violation Action: %
Major Minor: %
A
PERMIT: NC0003425 FACILITY: Duke Energy Progress LLC - Roxboro Steam Electric COUNTY: Portion REGION: Raleigh
Power Plant
Limit Violation
MONITORING
OUTFALL/
VIOLATION
UNIT OF
CALCULATED
%
REPORT
PPI LOCATION
PARAMETER
DATE FREOUENCY
MEASURE
LIMIT VALUE
Over
VIOLATION TYPE VIOLATION ACTION
10.2018
006 Effluent
Solids, Total Suspended -
10/10/18 2 X month
mgfl
50 56
12
Daily Maximum Proceed to NOV
Concentration
Exceeded
t)20 r[. - Y�o✓ 20, �3
Lr /�c �eT��l4% ACX ss."aIrk
rev✓-ZoiB-LV- vg yq
(Ko e4cA-al)

Whole Effluent Toxicity Testing and Self Monitoring Summary
Duke Energy Lee Steam/003
NC0003417/003
County:
Wayne
Fthd24Ac Begin:
10/1/2030 24hr LCSO
ac monit ft
NonComp:
J
F
M
A
M
2015
H
H
H
H
2016 H
H
2017 H
H
H
2018 H
H
H
H
Duke Energy Lee Steam Plant
NC0003417/001
County:
Wayne
Cerl7cIPF Begin:
11/1/2009 chr IIm: 2.1%
NonComp:
Single
J
F
M
A
M
2015 H
H
H
H
2016
H
H
H
H
2017 H
H
H
H
2018 -
-
Pass
H
Pass
2019 H
Duke Energy -Cape Fear S.E./007
NC0003433/007
County:
Chatham
Cer17cIPF Begin:
2/1/2019 chr I1m: 90%
NonComp:
Single
J
F
M
A
M
2025
H
H
2016 H
H
H
2017 -
Pass
-
-
Pass
2018
H
H
2019 H
Duke Energy-Roxboro/003
NC0003425/003
County:
Person
Fthd24PF Begin:
5/1/2007 24hr ac p/f
IIm: 90%f .
NonComp:
Single
/
F
M
A
M
2015 -
-
Pass
-
-
2036 -
-
Pass
-
-
2017 -
-
Pass
-
-
2018 -
-
Pass
-
-
Duke Energy-Roxboro/006
NC0003425/006
County:
Person
Fthd24Ac Begin:
5/1/2007 24hr LC50 ac monit a
NonComp:
J
F
M
A
M
2015 >100
-
-
-
-
2036 -
-
>100
-
-
2017 -
-
-
-
>100
2018 -
-
-
-
>100
Region:
WARD
Basin:
NEU12
SOC_JOC:
7Q10:
PF:
IWC:
Freq: SOWD/A
l
l
A
S
O
N
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
Region:
WARD
Basin:
NEU12
Mar Jun Sep Dec
SOC_JOC:
7QIO:
263.0
PF: VAR IWC:
0.47 Freq: 1/Qtr
l
J
A
S
O
N
H
H
H
H
Pass
H
H
H
H
H
H
H
H
Pass
H
H
NR
H
Region:
RRO
Basin:
CPF07
Feb May Aug Nov
SOC_JOC:
7Q30:
0.0
PF: NA
IWC:
100 Freq: Q
J
J
A
S
O
N
H
H
H
H
-
-
Fail
>100
>100
Pass
H
-
-
Fail
Region:
RRO
Basin:
ROA05
Mar Jun Sep Dec
SOC_JOC:
7Q10:
lake
PF: NA
IWC:
NA Freq: Q
/
J
A
S
O
N
Pass
-
-
Pass
-
-
Pass
-
-
Pass
-
-
Pass
-
-
Pass
-
-
Pass
-
-
Pass
-
-
Region:
RRO
Basin:
ROA05
SOC_JOC:
7Q10:
lake
PF: NA
IWC:
NA Freq: A
/
J
A
5
O
N
D
H
H
H
D
H
H
Pass
H
D
H
D
Pass
Pass
Pass
Pass
D
r
Legend: P= Fathead minnow (Pimohales oromelas). H=No Flow ffacility is activel. s = Split test between Certified Labs Page 32 of 108

Region nspectors' Checklist for Fi Parameters
[This checklist is to be coral udng regional plant inspections for Field Laboratodes. do )y certification numbers in the 5000s]
Facility Name: tj tF d Ekc.
Regional Plant Inspector:VUF-stAlAeouel
NPDES#: cvoo3-Iz 'Roock Plla.t
Regional Insector ontact#: tq- /-yzsf
Field Lab Certification #: 6o,80
Re ion:
Lab Contact: 6-1Z S 0.vc
Date:
I. Check the parameter(s) performed at this site for reporting purposes.
❑ Total Residual Chlorine (TRC) Temperature (TEMP) ❑ Specific Conductivity (SC)
'KpH Dissolved Oxygen (DO) ❑ Settleable Residue (SETT)
IL General Laboratory note any exceptions in section XI
Are instruments meters probes, photometric cells etc. maintained in good condition?
I M Yes ❑ No
Are standards, reagents and consumables used within manufacturer expiration dates?
RC gel standard is exempt.]
Yes ❑ No
Are the following items documented where a livable
Item
TRC
pH
TEF4P
DO
SC J
Date of sample collection*
Time of sample collection*
Sample collectors initials or signature
Date of sample analysis*
Time of sample analysis*
T/A
Analyst initials or signature
Sample site i.e., facilityname, location, ID, etc.
Instrument ID
Parameter
Data qualifiers, when required
`Date and time of sample collection and analysis may be the same for in situ or on -site measurements.
III. Total Residual Chlorine — reference method:
Total Residual Chlorine meter make and model:
Is a check standard analyzed each day of use? Circle one: gel or liquid standard
Yes
No
What is the assigned/observed value of the daily check standard?
Is a 5-point calibration verificationperformed? Note date of last verification:
Yes
❑ No
Alternatively, does the lab construct a linear regression, using 5 standards, to calculate
results? Note date of last calibration curve constructed:
❑ Yes
❑ No
True values: ❑ pg/L ❑ mg/L
Obtained values: ❑ pg/L ❑ mg/L
What program are samples analyzed on?
Are results reported in proper units? Check one: /L ❑ m /L
Yes
❑ No
Are results reported between the facility's permit limit and the compliance limit of 50 pg/L?
If value is less than the low standard, report as "<x", where x=low standard conc.
❑ Yes
❑ No
Are samples analyzed within 15 minutes of collection?
❑ Yes
❑ No
IV. pH — reference method:
pH meter manufacturer and model: fawn L,' "Y✓1{
Is the pH meter calibrated with jlit least 2 buffers per mfg's instructions each day of use?
Note buffers used: d to. 0
qYes
❑ No
Is the pH meter calibration checked with an additional buffer each day of use?
Note check buffer used: -.O
Yes
❑ No
Does the check buffer read within t0.1 S.U. of the known value?
ffYes
❑ No
Are the following items documented:
Meter calibration?
Yes
ONo
Check buffer readin s ?
Yes
No
Are samples analyzed within 15 minutes of collection?
Z Yes
❑ No
Are sample results reported to 0.1 pH units on the eDMR?
V Yes
0 No

V. Temperature - reference m d:
What instrument(s) is used to meas__3mperature? Check all that apply: ,,, , meter
DO meter ❑ . _ Conductivit meter Digital thermometer Glass thermometer
Is the instrument/thermometer calibr ion ch��ked at least annually against a NIST
traceable thermometer? 's 7�rPm- jGeAeA , e n,n q
Yes
❑ No
Is NIST traceability documentation maintained on site?
es
❑ No
Are samples measured in situ or on -site? [REQUIRED - there is no holding time for
temperature] d ; -6 -
NrYes
❑ No
Are sample results reported in degrees C?
Yes
❑ No
VI. Dissolved Oxygen - reference method:
DO meter make and model:
Is the air calibration of the DO meter performed each day of use?
0 Yes
❑ No
Are the following items documented:
Meter calibration?
Yes
❑ No
Are samples analyzed within 15 minutes of collection?
❑ Yes
❑ No
Are results reported in m /L?
Yes
❑ No
VII. Conductivity - reference method:
Conductivity meter make and model:
Is the meter calibrated daily according to the manufacturer's instructions? Note standard
used this is generally a one -point calibration):
❑ Yes
❑ No
Is a daily check standard analyzed? Note value:
El Yes
❑ No
Are the following items documented:
Meter calibration?
❑ Yes
❑ No
Are samples analyzed within 28 days of collection?
Yes
❑ No
Are results reported in mhos/cm some meters display equivalent S/cm units)?
Yes
No
Vill. Settleable Residue - reference method:
Does the laboratory have an Imhoff Cone in good condition?
ETYes
0 No
Is the sample settled for 1 hour?
❑ Yes
❑ No
Is the sample aitated after 45 minutes?
❑ Yes
❑ No
Are the following items documented:
Volume of sample analyzed? Note volume analyzed:
❑ Yes
❑
No
Date and time of sample analysis(settling start time)?
Yes
No
Time of agitation after 45 minutes of settling?
❑ Yes
❑
No
Sample analysis completion(settling end time)?
0 Yes
No
Are samples analyzed within 48 hours of collection?
❑ Yes
❑
No
Are results reported in ml/L?
Yes
❑
No
IX. Was a paper trail (comparing contract lab and on -site data to DMRs)
performed? If so list months reviewed:
❑ Yes
❑ No
X. Is follow-up by the Laboratory Certification program recommended?
❑ Yes
No
XI. Additional comments:
Please submit a copy of this completed form to the Laboratory Certification program at
DWR Lab Certification, Water Sciences Section, 1623 Mail Service Center, Raleigh NC, 27699-1623
Electronic copies may be emailed to dana.satterwhite(a)ncdenr.gov.
Revision 12/13/2016