NC0004987_Draft Major Modification_20180109

Water Resources
Environmental Quality
January 9, 2018
Mr. Paul Draovitch, Senior Vice President
Environmental, Health and Safety
Duke Energy Carolinas, LLC
Mail Code EC13K
P.O. Box 1006
Charlotte, North Carolina 28201-1006
Dear Mr. Draovitch:
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Interim Director
Subject: Draft NPDES Major
Modification
Permit NC0004987
Marshall Steam Station
Catawba County
Facility Class I
Enclosed with this letter is a copy of the draft major modification for your facility. Please
review the draft very carefully to ensure thorough understanding of the conditions and
requirements it contains.
The draft major modification contains the following significant changes from your
current permit:
• The Seep Outfalls 101 and 102 and Seep Pollutant Analysis Special Condition were
eliminated from the permit.
• The applicability date for the bottom ash transport water and the FGD effluent was
postponed until December 31, 2023 based on the proposed EPA rulemaking.
• The groundwater compliance boundary map was added to the permit.
• The new outfall for the new lined Retention Basin (Outfall 005) was added to the permit,
please see A. (9.).
• The Compliance Boundary special condition was added to the permit, please see A. (32.).
• The Groundwater Monitoring Well Construction and Sampling special condition was
eliminated from the permit.
• The requirement for a physical/chemical treatment was eliminated from the permit to meet
accelerated closure requirements in the SOC.
Please provide any comments you have regarding the draft permit to this office by February
9, 2018. At this time, the Division is also publishing a notice in the newspapers of general
circulation in Catawba County, inviting public comment on the draft major modification. Following
Nothing Compares.
State of North Carolina I Environmental Quality
1611 Mail Service Center I Raleigh, North Carolina 27699-1611
919-707-9000

the 30 -day comment period, we will review all pertinent comments received and take appropriate
action on the permit renewal. The NPDES Standard Conditions (Parts II, III, and IV) are not
included with this draft. They can be found at the following link if you would like to review them in
conjunction with this draft permit. http://ncdenr.s3.amazonaws com/s3fs-
pubhc /Water%20Ouahty/Surface%20Water%20Protection /NPDES /MISC /NPDES%20Standard
%20Conchtions-Boilerplate-DWR-SWP-NPDES-20150410.pdf
If you have any questions about the NPDES permit process, please contact me at the following e -
mad address: [e-mail], or telephone number: 919-807-6386.
Sincerely,
Sergei Cherenkov, Ph.D.
Environmental Engineer II
Complex NPDES Permitting Unit
cc. NPDES Files
EPA Region IV (e -copy)
Mooresvile Regional Office / Sur -ace Water Protection (e -copy)
Mooresvile Regional Office / Public Water Supply (e -copy)
Aquatic Toxicology Unit (e -copy)
TACU (e -copy)

PERMIT No NC0004987
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
Draft PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the 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 Carolinas, LLC
is hereby authorized to discharge wastewater from a facility located at
Marshall Steam Station
At the intersection of NC Highway 150 and NCSR 1841
Terrell
Catawba County
to receiving waters designated as the Catawba River (Lake Norman) in the Catawba River
Basin in accordance with effluent limitations, monitoring requirements, and other
applicable conditions set forth in Parts I, II, and III hereof.
This major modification shall become effective
This permit and authorization to discharge shall expire at midnight on September 30,
2021.
Signed this day
Linda Culpepper, Interim Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 25

TO PERMIT COVER SHEET
PERMIT No. NC0004987
All previous NPDES Permits issued to this facility, whether for operation or discharge
are hereby revoked, and as of this issuance, any previously issued permit bearing this
number is no longer effective. 11Therefore, the exclusive authority to operate and
discharge from this facility arises under the permit conditions, requirements, terms,
and provisions included herein.
Duke Energy Carolinas, LLC is hereby authorized to:
1. Continue to discharge:
• Outfall 001: once -through cooling water and intake screen backwash
• Outfall 002: treated' wastewater (consisting of metal cleaning wastes, coal
pile runoff, ash transport water, storm water, low volume wastes, landfill
leachate, and FGD wet scrubber wastewater) from the ash settling basin
• Outfall 005. Upon completion of construction, discharge from the new
lined retention basin. Basin will accept wastes from holding basin (coal
pile runoff), ash transport water, various sumps, stormwater runoff, FGD
wastewater, and various low volume wastes such as boiler blowdown, oily
waste treatment, wastes/backwash from the water treatment processes,
plant area wash down water, equipment heat exchanger water, landfill
leachate, and ash transport water. Upon completion of construction all
waste streams previously discharged to ash basin, will be re-routed to the
new retention basin. During the transition period, wastewater from the
ash pond can also! be discharged (Outfall 002).
• Outfalls 002A and 002B: yard sump overflows.
• Outfall 007: the emergency spillway of the Ash Pond. The spillway is
designed for a flood greater than 100 -year event. Sampling of this spillway
is waived due to i nsafe conditions associated with sampling during
overflow event.
• Internal outfall 001/001A. Yard sump (wastewater from the yard sump 2,
the yard sump 3,1 the fly ash silo yard sump, and stormwater) discharging
to the retention basin.
• Internal Outfall 003: non -contact cooling water from the induced draft fan
control house to lintake for cooling water pumps.
• Internal Outfall 004: treated FGD wet scrubber wastewater, and
stormwater to ttie ash settling basin.
• Internal Outfall 06: treated FGD wet scrubber wastewater to the retention
basin. During transition period, both outfalls (004 and 006) can be
discharging during the transition period.
• Internal Outfall l010 from Holding Basin: coal pile runoff, and stormwater
to the retention basin.
From a facility
intersection of
County;
located at Duke Energy's Marshall Steam Station at the
NC Highway 150 and NCSR 1841 in Terrell, Catawba
Page 2 of 25

PERMIT No NC0004987
2. Discharge from said treatment works at the locations specified on the
attached map into the Catawba River (Lake Norman) which is classified
WS -IV and B CA waters in the Catawba River Basin.
Page 3 of 25

PERMIT No. NC0004987
PART I
A. (1.) Effluent Limitations and;Monitoring Requirements (Outfall 001)
[ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
I
During the period beginning on; the effective date of this permit and lasting until
expiration, the Permittee is authorized to discharge from Outfall 001 (once -through
coaling water). Such discharges shall be limited and monitored2 by the Permittee as
specified below:
EFFLUENT
DISCHARGE LIMITATIONS
V MONITORING REQUIREMENTS
Monthly
Daily
Measurement
Sample
Sample
CHARACTERISTICS
Avera a
Maximum
11 Frequency
a
Location
Pump logs or
Flow, MGD
Monitor & Report
Daily
similar
Effluent
readings
Temperature
November 1 -June 30
33.3 oC
Daily
Grab
Effluent
Temperature
FJuI 1 -October 31
34 4 oC
Daily
Grab
Effluent
Free Available
Chlorine
0.2 mg/L'
0.5 mg/L
Daily
Grab
Effluent
NDTEs:
1 .Once -through cooling water shall not be chlorinated. Should the facility wish to chlorinate
once -through cooling water, Division permission shall be obtained prior to
commencement of chlorination. The monitoring requirement and effluent limitations only
apply if chlorination is commenced.
2 The permittee shall submit Discharge Monitoring Reports electronically using NC
DWR's eDMR application system. Please See Special Condition A. (31.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Based upon studies conducted by the permittee and submitted to the Division, it has been
determined pursuant to Section 316(a) of the Clean Water Act that the thermal component of
the discharge assures the protection and propagation of a balanced, indigenous population of
shellfish, fish and wildlife in the receiving water.
I
I
I
Page 4 of 25

PERMIT No. NC0004987
A. (2.) Effluent Limitations and Monitoring Requirements (Outfall 002 - normal
operation/ decanting)
[ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until
expiration, the Permittee is authorized to discharge from Outfall 002 (ash settling
basin discharge - decanting the free water above the settled ash layer that does
not involve mechanical disturbance of the ash). Such discharges shall be limited
and monitored4 by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
DISCHARGE LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Avera a
Daily
Maximum
Measurement
Frequency
Sample
a
Sample
Location'
Flow, MGD
Monitor & Report
Weekly
Pump logs
or similar
readings
Effluent
Oil and Grease
9 0 mg/L
12 0 mg/L
Monthly
Grab
Effluent
Total Suspended Solids2
20.0 mg/L
50 0 mg/L
Monthly
Grab
Effluent
Total Arsenic, µg/L
Weekly
Grab
Effluent
Total Copper
1 0 mg/L3
1 0 mg/L3
Weekly
Grab
Effluent
Total Iron
1 0 mg/L3
1 0 mg/L3
Weekly
Grab
Effluent
Total Mercury6
Weekly
Grab
Effluent
Total Selenium, µg/L
Weekly
Grab
Effluent
Turbidity5, NTU
Monthly
Grab
Effluent
Nitrate/nitrite as N, mg/L
Quarterly
Grab
Effluent
Bromide, mg/L
Monthly
Grab
Effluent
Total Hardness, mg/L
Monthly
Grab
Effluent
Total Nitrogen
NO2+NO3+TKN , m L
Monitor & Report
Quarterly
Grab
Effluent
Total Phosphorus, mg/L
Monitor & Report
Quarterly
Grab
Effluent
Chronic Toxicity
See Part I, Section A. (19)
Monthly
Grab
Effluent
pHA
Between 6 0 and 9 0 Standard
Units
Monthly
Grab
Effluent
NOTES:
1 Effluent sampling shall be conducted at the discharge from the ash settling basin prior to
mixing with any other waste stream(s).
2 The facility shall continuously monitor TSS concentration when the decanting process
commences and the decanting pump shall be shutoff automatically when the one half of
the Dally 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 decanting.
3 The limits for total copper and total iron only apply when chemical metal cleaning
wastewaters are being discharged.
4 The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's
eDMR application system. Please See Special Condition A. (31.).
5 The net turbidity shall not exceed 50 NTU using a grab sample and measured by the
difference between the effluent turbidity and the background turbidity. The sample for the
background turbidity shall be taken at point in the receiving waterbody upstream of the
discharge location, and the background turbidity and the effluent turbidity samples shall
be taken within the same 24 hour period.
NTU - Nephelometric Turbidity Unit
Page 5 of 25

PERMIT No NC0004987
6 The facility shall use EPA method 1631E.
7 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.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
The facility is allowed to drawdown the wastewater in the ash pond to no less than three
feet above the ash.
The level of water in the ash pond should not be lowered more than 1 ft/week, unless
approved by the DEQ Dam Safety Program.
The facility shall use a floating pump station with free water skimmed from the basin
surface using an adjustable weir.'
By November 1, 2018 there shall be no discharge of pollutants in fly ash transport water.
This requirement only applies to, fly ash transport water generated after November 1,
2018.
By December 31, 2019 the facility shall convert to the disposal of dry bottom ash, as
defined in CAMA. In accordance with the House Bill 630 of 2016 (HB630) there shall be
ne discharge of pollutants in bottom ash transport water by 12/31/2019 (the date can
be changed if the House Bill is amended, in such case the new date will be substituted
without re -opening of the permit). This requirement only applies to bottom ash
transport water generated after 12/31/2019 or a new date as HB630 may be amended.
By December 31, 2023 there shall be no discharge of pollutants in bottom ash transport
waxer. This requirement only applies to bottom ash transport water generated after
December 31, 2023. The permit can be modified to implement the revised ELGs based
on the results of the EPA rulemaking.
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.
i
The facility shall notify DWR Complex NPDES Permitting Unit and DWR Mooresville
Regional Office seven calendar days prior to the commencement of the decanting.
Page 6 of 25

PERMIT No NC0004987
A. (3.) Effluent Limitations and Monitoring Requirements (Outfall 002 -
dewatering phase)
[ 15A NCAC 02B.0400 et seq., 02B.0500 et seq.]
During the period beginning on the commencement date of the dewatering operation
and lasting until expiration, the Permittee is authorized to discharge from Outfall 002
Ash Settling Basin Discharge (Dewatering - removing the interstitial water). Such
discharszes shall be limited and monitored4 by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
DISCHARGE
LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Avera a
Daily
Maximum
Measurement
Fre uenc
Sample
a
Sample
Location'
Flow
1.0 MGD
Weekly
Pump logs
or similar
readings
Effluent
Oil and Grease
9.0 mg/L
12 0 mg/L
Monthly
Grab
Effluent
Total Suspended Solids2
20 0 mg/ L
50 0 mg/ L
Monthly
Grab
Effluent
Total Arsenic
397 1 µg/L
11,121 µg/L
Weekly
Grab
Effluent
Total Copper
1 0 mg/L3
1 0 mg/L3
Weekly
Grab
Effluent
Total Iron
1.0 mg/L3
1 0 mg/L3
Weekly
Grab
Effluent
Total Mercury6
Weekly
Grab
Effluent
Total Selenium, µg/L
Weekly
Grab
Effluent
Turbidity5, NTU
Monthly
Grab
Effluent
Nitrate/nitrite as N, mg/L
Quarterly
Grab
Effluent
Bromide, mg/L
Monthly
Grab
Effluent
Total Hardness, mg/L
Monthly
Grab
Effluent
Total Nitrogen
NO2+NO3+TKN , m L
Monitor &Report
Quarterly
Grab
Effluent
Total Phosphorus, mg/L
Monitor & Report
Quarterly
Grab
Effluent
Chronic Toxicity
See Part I, Section A (19)
Monthly
Grab
Effluent
pHA
Between 6 0 and 9.0 Standard
Units
Monthly
Grab
Effluent
NOTES:
1 Effluent sampling shall be conducted at the discharge from the ash settling basin prior to
mixing with any other waste stream(s).
2 The facility shall continuously monitor TSS concentration when the dewatering process
commences and the dewatering pump shall be shutoff automatically when the 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.
3 The limits for total copper and total iron only apply when chemical metal cleaning
wastewaters are being discharged.
4 The permittee shall submit Discharge Monitoring Reports electronically using NC
DWR's eDMR application system. Please See Special Condition A. (31.).
5 The net turbidity shall not exceed 50 NTU using a grab sample and measured by the
difference between the effluent turbidity and the background turbidity. The sample for
the background turbidity shall be taken at point in the receiving waterbody upstream of
the discharge location, and the background turbidity and the effluent turbidity samples
shall be taken within the same 24 hour period.
NTU - Nephelometric Turbidity Unit.
6 The facility shall use EPA method 1631E.
Page 7 of 25

PERmiT No. NC0004987
7 The facility shall continuously monitor pH when the dewatering process commences
and the dewatering pump shall be shutoff automatically when 15 minutes running
average pH falls below 6.1 standard units or rises above 8.9 standard units. Pumping
will be allowed to continue if interruption might result in a dam failure or damage.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
The level of water in the ash pond should not be lowered more than 1 ft/week, unless
approved by the DEQ Dam Safety Program.
By November 1, 2018 there shall be no discharge of pollutants in fly ash transport water.
This requirement only applies to fly ash transport water generated after November 1,
2018.
By December 31, 2019 the facility shall convert to the disposal of dry bottom ash, as
defined in CAMA. In accordance with the House Bill 630 of 2016 (HB63O) there shall be
no discharge of pollutants in bottom ash transport water by 12/31/2019 (the date can
be changed if the House Bill is amended, in such case the new date will be substituted
without re -opening of the permit). This requirement only applies to bottom ash
transport water generated after 12/31/2019 or a new date as HB63O may be amended.
By December 31, 2023 there shall be no discharge of pollutants in bottom ash transport
water. This requirement only applies to bottom ash transport water generated after
December 31, 2023. The permit can be modified to implement the revised ELGs based
on the results of the EPA rulemaking.
Page 8 of 25

PERMIT No NC0004987
A. (4.) Effluent Limitations and Monitoring Requirements (Outfall 002A)
[ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until
expiration, the Permittee is authorized to discharge from Outfall 002A (yard sump #1
overflows). Such discharges shall be limited and monitored2 by the Permittee as
specified below:
NOTES:
1 Effluent samples shall be collected at a point upstream of the discharge to the Catawba River.
2 The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's
eDMR application system. Please See Special Condition A. (31.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
All flows shall be reported on monthly DMRs. Should no flow occur during a given
month, the words "No Flow" shall be clearly written on the front of the DMR. All samples
shall be of a representative discharge.
Page 9 of 25
DISCHARGE LIMITATIONS
I MONITORING REQUIREMENTS
EFFLUENT
MonthlyDaily
Measurement
Sample
Sample
CHARACTERISTICS
Avera a Maximum
Frequency
a I
Locations
Flow, MGD
Per discharge
Estimate
Effluent
event
p H
Between 6 0 and 9.0 Standard
Per discharge
Grab
Effluent
Units
event
Total Suspended Solids
30.0 mg/L
100 0 mg/L
Per discharge
Grab
Effluent
event
Oil and Grease
15 0 mg/L
20.0 mg/L
Per discharge
Grab
Effluent
event
Total Iron, mg/L
Per discharge
Grab
Effluent
event
NOTES:
1 Effluent samples shall be collected at a point upstream of the discharge to the Catawba River.
2 The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's
eDMR application system. Please See Special Condition A. (31.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
All flows shall be reported on monthly DMRs. Should no flow occur during a given
month, the words "No Flow" shall be clearly written on the front of the DMR. All samples
shall be of a representative discharge.
Page 9 of 25

PERMIT No. NC0004987
A. (5.) Effluent Limitations and Monitoring Requirements (Outfall 002B)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning ',on the effective date of this permit and lasting until
expiration, the Permittee is authorized to discharge from Outfall 002B (yard sump #2
overflows). Such discharges shall be limited and monitored2 by the Permittee as
specified below:
EFFLUENT
DISCHARGE LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Daily
Measurement
Sample
Sample
CHARACTERISTICS
Avera—
Maximum
Frequency
Type
Location'
Flow, MGD
Per discharge
Estimate
Effluent
event
pH
Between 6.0 and 9.0 Standard
Per discharge
Grab
Effluent
Units
event
Total Suspended Solids
30 0 mg/L
100 0 mg/L
Per discharge
Grab
Effluent
event
Oil and Grease
15 0 mg/L
20.0 mg/L
Per discharge
Grab
Effluent
event
Total Iron, mg/L
Per discharge
Grab
Effluent
event
NOTES:
1 Effluent samples shall be collected at a point upstream of the discharge to the Catawba River.
2 The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's
eDMR application system. Please See Special Condition A. (31.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
All flows shall be reported on monthly DMRs. Should no flow occur during a given
mor_th, the words "No Flow" shall be clearly written on the front of the DMR. All samples
shall be of a representative discharge.
10 of 25

PERMIT No NC0004987
A. (6.) Effluent Limitations and Monitoring Requirements (Internal Outfall 003)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until
expiration, the Permittee is authorized to discharge from Internal Outfall 003 (non -
contact cooling water from the induced draft fan control house). Such discharges
shall be limited and monitored2 by the Permittee as specified below:
NOTES'
1 Monitoring requirements apply only if chlorine is added to the cooling water. Neither free
available chlorine nor total residual chlorine may be discharged from any unit for more than
two hours in any one day and not more than one unit in any plant may discharge free
available chlorine or total residual chlorine at any one time.
2 The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's
eDMR application system. Please See Special Condition A. (31.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Limitations shall be met at the discharge point.
Page 11 of 25
DISCHARGE
LIMITATIONS
MONITORING REQUIREMENTS
EFFLUENT
Monthly
Daily
Measurement
Sample
Sample
CHARACTERISTICS
Avera a
Maximum
Frequency
Type
Location
Flow, MGD
Semi-annually
Estimate
Effluent
Temperature, OC
Semi-annually
Grab
Effluent
Total Residual
Semi-annually
Grab
Effluent
Chlorine',µ L
Free Available
0 2 mg/L
0.5 mg/L
Semi-annually
Grab
Effluent
Chlorine'
pH
Between 6 0 and 9 0 Standard
Semi-annually
Grab
Effluent
Units
NOTES'
1 Monitoring requirements apply only if chlorine is added to the cooling water. Neither free
available chlorine nor total residual chlorine may be discharged from any unit for more than
two hours in any one day and not more than one unit in any plant may discharge free
available chlorine or total residual chlorine at any one time.
2 The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's
eDMR application system. Please See Special Condition A. (31.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Limitations shall be met at the discharge point.
Page 11 of 25

PERMIT No. NC0004987
A. (7.) Effluent Limitations and Monitoring Requirements (Internal Outfall 004)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until
expiration, the Permittee is authorized to discharge from Internal Outfall 004 (treated
FGD wet scrubber wastewater to ash settling basin, and stormwater). Such
discharges shall be limited and monitored2 by the Permittee as specified below:
EFFLUENT
DISCHARGE LIMITATIONS
I MONITORING REQUIREMENTS
Monthly
Daily
Measurement
Sample
Sample
CHARACTERISTICS
Average
Maximum
I re uenc
Tye
Location'
Pump logs or
Flow, MGD
Monitor & Report
Monthly
similar
Effluent
readings
Total Arsenic
8 0 µg/L4
11.0 µg/L4
Quarterly
Grab
Effluent
Total Mercury3, ng/L
356 0 ng/L4
788.0 ng/L4
Quarterly
Grab
Effluent
Total Selenium
12 0 jig/L4
23.0 pg/L4
Quarterly
Grab
Effluent
Ni=rate/mtnte as N
4 4 mg/L4
17 0 mg/L4
Quarterly
Grab
Effluent
pH
Between 6 0 and 9 0 Standard
Quarterly
Grab
Effluent
Units
NoTEs•
1 Sample Location: E - Effluent samples shall be collected from the constructed wetland
prior to discharge to the ash settling basin.
2 The permittee shall submit Discharge Monitoring Reports electronically using NC
DWR's eDMR application system. Please See Special Condition A. (31.).
3 The facility shall use EPA method 1631E
4 The TBEL limits shall become effective on December 31, 2023. This time period is
provided in order for the facility to budget, design, and construct the treatment system
The facility shall monitor these parameters even before the limits become effective. The
permit can be modified to implement the revised ELGs based on the results of the EPA
rulemaking.
All flows shall be reported on monthly DMRs. Should no flow occur during a given
month, the words "No Flow" shall be clearly written on the front of the DMR. All samples
shall be of a representative discharge.
I
Page 12 of 25
I
i

PERMIT No NC0004987
A. (9.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 005)
[ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning upon commencement of operations and lasting until
expiration, the Permittee is authorized to discharge from Outfall 005 - Retention
Basin discharge. Such discharges shall be limited and monitored' by the Permittee as
specified below:
EFFLUENT CHARACTERISTICS
DISCHARGE LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement Sample Sample
Fre uenc 2 e Location
Flow, MGD
Weekly
Instantaneous
or Estimate
Effluent
pH
Between 6 0 and 9 0
standard units
Monthly
Grab
Effluent
TSS
30 0 m L
100 0 m L
Monthly
Grab
Effluent
Oil and Grease
15 0 m L
20 0 nig/ L
Monthly
Grab
Effluent
Fluonde, m L
Monthly
Grab
Effluent
Total Mercury2, n L
Monthly
Grab
Effluent
Total Silver, µ L
Monthly
Grab
Effluent
Total Iron3
1 0 m L
1.0 m L
Monthly
Grab
Effluent
Total Zinc, µ L
Monthly
Grab
Effluent
Total Arsenic, µ L
Monthly
Grab
Effluent
Total Cadmium, µ L
Monthly
Grab
Effluent
Total Chromium, µ L
Monthly
Grab
Effluent
Total Co era
68 8 µ L
76 8 µ L
Monthly
Grab
Effluent
Total Lead, µ L
Monthly
Grab
Effluent
Total Nickel, µ L
Monthly
Grab
Effluent
Total Selenium, µ L
Monthly
Grab
Effluent
Total Nitrogen
NO2 + NO3 + TKN , m L
Quarterly
Grab
Effluent
Total Phosphor -us, m L
Quarterly
Grab
Effluent
Sulfates, m L
Monthly
Grab
Effluent
Chlorides, m L
Monthly
Grab
Effluent
Bromide, m L
Monthly
Grab
Effluent
TDS, m L
Monthly
Grab
Effluent
Total Hardness, m L
Monthly
Grab
Effluent
Temperature, OC
Monthly
Grab
Effluent
Conductivity, µmho cm
Monthly
Grab
Effluent
Chronic Toxicity4
Monthly
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC
DWR's eDMR application system. Please See Special Condition A. (31.).
2. The facility shall use EPA method 1631E.
3. The limits for total copper and total iron only apply when chemical metal cleaning
wastewaters are being discharged.
4. Whole Effluent Toxicity shall be monitored by chronic toxicity (Ceriodaphnia) P/F
at 23.0%, see Special Condition A. (19.).
5. The limit and monitoring apply only when the domestic wastewater is being
discharged to the basin.
The facility shall submit EPA Form 2C for Outfall 005 no later than 180 days
from the commencement of the discharge. The facility shall notify DWR/NPDES
30 days prior to the commencement of the discharge from this outfall.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 14 of 25

PERMIT No. NC0004987
A. (8.) Effluent Limitations and Monitoring Requirements (Internal Outfall 006)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until
expiration, the Permittee is authorized to discharge from Internal Outfall 006 (treated
FGD wet scrubber wastewater to retention basin). Such discharges shall be limited
and monitored2 by the Permittee as specified below:
NOTES
1 Sample Location: E - Effluent samples shall be collected from the constructed wetland
prior to discharge to the ash settlmg basin.
2 The permittee shall submit Discharge Monitoring Reports electronically using NC
DWR's eDMR application system. Please See Special Condition A. (31.).
3 The facility shall use EPA method 1631E.
4 The TBEL limits shall become effective on December 31, 2023. This time period is provided
in order for the facility to budget, design, and construct the treatment system. The facility
shall monitor these parameters even before the limits become effective. The permit can be
modified to implement the revised ELGs based on the results of the EPA rulemaking.
All flows shall be reported on monthly DMRs. Should no flow occur during a given
month, the words "No Flow" shall be clearly written on the front of the DMR. All samples
shall be of a representative discharge.
Page 13 of 25
DISCHARGE LIMITATIONS
MONITORING REQUIREMENTS
EFFLUENT
CHARACTERISTICS
MonthlyDaily
T
Measurement
Sample
Sample
Average
Maximum
Fre uency
Type
Location'
Pump logs or
Flow, MGD
Monitor & Report
Monthly
similar
Effluent
readin s
Total Arsenic
8.0 µg/L4
11.0 µg/L4
Quarterly
Grab
Effluent
Total Mercury3, ng/L
356 0 ng/L4
788.0 ng/L4
Quarterly
Grab
Effluent
Total Selenium
12 0 lig/L4
23 0 pg/L4
Quarterly
Grab
Effluent
riltrate/nitrite as N
4.4 mg/L4
17 0 mg/L4
Quarterly
Grab
Effluent
pH
Between 6 0 and 9 0 Standard
Quarterly
Grab
Effluent
Units
NOTES
1 Sample Location: E - Effluent samples shall be collected from the constructed wetland
prior to discharge to the ash settlmg basin.
2 The permittee shall submit Discharge Monitoring Reports electronically using NC
DWR's eDMR application system. Please See Special Condition A. (31.).
3 The facility shall use EPA method 1631E.
4 The TBEL limits shall become effective on December 31, 2023. This time period is provided
in order for the facility to budget, design, and construct the treatment system. The facility
shall monitor these parameters even before the limits become effective. The permit can be
modified to implement the revised ELGs based on the results of the EPA rulemaking.
All flows shall be reported on monthly DMRs. Should no flow occur during a given
month, the words "No Flow" shall be clearly written on the front of the DMR. All samples
shall be of a representative discharge.
Page 13 of 25

PERMIT No. NC0004987
A. (10.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall
008)
[ 15A NCAC 02B.0400 et seq., 02B.0500 et seq.]
During the period beginning on the effective date of this permit and lasting until
expiration, the Permittee is authorized to discharge from outfall 008 - Emergency
spillway of the ash basin. Such discharges shall be limited and monitored' by the
Permittee as specified below:
EFFLUENT CHARACTERISTICS
DISCHARGE LIMITATIONS
MONITORING REQuIREMENTB
Monthly Daily
Average Maximum
MeasurementSample Sample
Fre uenc 7a Location
Flow, MGD
Waived Estimate Effluent
H
Estimate
Waived Grab Effluent
TSS
Waived Grab Effluent
Oil and Grease
Grab
Waived Grab Effluent
The emergency spillway is designed for a flood greater than 100 -year event in Catawba
County. Sampling of this spillway is waived due to unsafe conditions associated with
sampling during overflow event.
Monitoring is required for any other rain event that might trigger a discharge.
A. (11.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Internal
Outfall 010)
[ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning upon commencement of operation of the yard sump and
lasting until expiration, the Permittee is authorized to discharge from Internal outfall
010 - Coal yard runoff and stormwater. Such discharges shall be limited and
monitored' by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
DISCHARGE LIMITATIONS
MONITORING RE UIREMENTS
Monthly Daily
Avera a Maximum
Measurement SampleSample
Frequency a Location
Flow, MGD
Quarterly
Estimate
Effluent
H
Quarterly
Grab
Effluent
TSS
30 0 m L
50.0 m L
Quarterly
Grab
Effluent
Oil and Grease
15.0 m L
20.0 m L
Quarterly
Grab
Effluent
Notes:
1. The permittee shall submit Discharge Monitoring Reports electronically using
NC DWR's eDMR application system. Please See Special Condition A. (31.).
Page 15 of 25

PERMIT No. NC0004987
A. (12.) ADDITIONAL CONDITIONS AND DEFINITIONS
[_NCGS 143-215.3 (a) (2) and NCGS 143-215.66]
1. EPA methods 200.7 or 200.8 (or the most current versions) shall be used for
analyses of all metals except for total mercury (EPA Method 1631E).
2. All effluent samples for all external outfalls shall be taken at the most
accessible location after the final treatment but prior to discharge to waters of
the U.S. (40 CFR 122.416)).
3. The term low volume waste sources means wastewater from all sources except
those for which specific limitations are otherwise established in this part (40
CFR 423.11 (b)).
4. The term chemical metal cleaning waste means any wastewater resulting from
cleaning any metal process equipment with chemical compounds, including,
but not limited to, boiler tube cleaning (40 CFR 42 3. 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.
A. (13.) TOXICITY RE -OPENER CONDITION
[NCGS 143-215.3 (a) (2) and NCGS 143-215.66]
This permit shall be modified, or revoked and reissued to incorporate toxicity limitations
and monitoring requirements in the event toxicity testing or other studies conducted on
the effluent or receiving stream indicate that detrimental effects may be expected in the
receiving stream as a result of this discharge.
A. (14.) APPLICABLE STATE LAW (STATE ENFORCEABLE ONLY)
[NCGS 143-215.1(b)]
The facility shall meet the requiremei
permit may be reopened to include n
A. (15.) POLYCHLORINATED BIPHENYL 4
[40 CFR 4231
There shall be no discharge of poly
commonly used for transformer fluid.
A. (16.) BIOCIDE CONDITION
[NCGS 143-215.1]
is of Senate Bill 729 (Coal Ash Management Act). This
w requirements imposed by Senate Bill 729.
biphenyl compounds such as those
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
Page 16 of 25

PERMIT No NC0004987
ninety (90) days prior to instituting use of any additional biocide used in cooling systems
which may be toxic to aquatic life other than those previously reported to the Division
of Water Resources. Such notification shall include completion of Biocide Worksheet
Form 101 and a map locating the discharge point and receiving stream. Completion of
Biocide Worksheet Form 101 is not necessary for those outfalls containing toxicity
testing. Division approval is not necessary for the introduction of new biocides into
outfalls currently tested for whole effluent toxicity.
A. (17.) INTAKE SCREEN BACKWASH
[NCGS 143-215.1 (b)]
Continued intake screen backwash discharge and overflow from the settling basin are
permitted without limitations or monitoring requirements.
A. (18.) BEST MANAGEMENT PRACTICES
[NCGS 143-215.1 (b)]
It has been determined from information submitted that the plans and procedures in
place at Marshall Steam Station are equivalent to that of a Best Management Practice
(BMP) .
A. (19.) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT — OUTFALL 002 AND OUTFALL 005
[ 15A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or
significant mortality to Ceriodaphnia dubia at an effluent concentration of 23.0% for
decanting (Outfall 002) and Outfall 005, and 2.6% for dewatering (Outfall 002).
The permit holder shall perform at a minimum, monthly monitoring using test
procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay
Procedure," Revised December 2010, or subsequent versions or "North Carolina Phase
II Chronic Whole Effluent Toxicity Test Procedure" (Revised- December 20 10) or
subsequent versions. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall be performed at the NPDES permitted final
effluent discharge below all treatment processes.
If the monthly test procedure results in a failure or ChV below the permit limit,
then multiple -concentration testing shall be performed at a minimum, in each of
the two following months as described in "North Carolina Phase II Chronic Whole
Effluent Toxicity Test Procedure" (Revised -December 2010) or subsequent
versions.
All toxicity testing results required as part of this permit condition will be entered on
the Effluent Discharge Monitoring Form (MR -1) for the months in which tests were
performed, using the parameter code TGP3B for the pass/fail results and THP3B for
the Chronic Value. Additionally, DWR Form AT -3 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
Page 17 of 25

PERMIT No. NC0004987
1621Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section
e
no later than 30 days after the nd of the reporting period for which the report is
made.
Test data shall be complete, accurate, include all supporting chemical/physical
measurements and all concentration /response data, and be certified by laboratory
supervisor and ORC or approved designate signature. Total residual chlorine of the
effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.-
Should
tream:
Should there be no discharge of flow from the facility during a month in which toxicity
monitoring is required, the permittee will complete the information located at the top
of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe
number, county, and the month/year of the report with the notation of "No Flow" in
the comment area of the form. The report shall be submitted to the Water Sciences
Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is
required, monitoring will be required during the following month. Assessment of
toxicity compliance is based on the toxicity testing month.
Should any test data from this monitoring requirement or tests performed by the
North Carolina Division of Water Resources indicate potential impacts to the receiving
stream, this permit may be re -opened and modified to include alternate monitoring
requirements or limits.
NOTE: Failure to achieve test con 'ditions as specified in the cited document, such as
minimum control organism survival, minimum control organism reproduction, and
appropriate environmental controls, shall constitute an invalid test and will require
immediate follow-up testing to be c�9mpleted no later than the last day of the month
following the month of the initial monitoring.
�I
A. (20.) ASH SETTLING BASIN
[NCGS 143-215.1 (b)]
Beginning on the effective date of this permit and lasting until expiration, there shall be
no discharge of plant wastes to the ash pond unless the permittee provides and
maintains at all times a minimum)) free water volume equivalent to the sum of the
maximum 24-hour plant discharges plus all direct rainfall and all runoff flows to the
pond resulting from a 10 -year, 24-hour rainfall event, when using a runoff coefficient of
1.0.
During the term of the permit, the permittee shall remove settled material from the
ponds or otherwise enlarge the available storage capacities in order to maintain the
required minimum volumes at all times. Annually the permittee shall determine and
report to the permit issuing authority: (1) the actual free water volume of the ash pond,
(2) physical measurements of the dimensions of the free water volume in sufficient detail
Page 18 of 25

PERMIT No. NC0004987
to allow validation of the calculated volume, and (3) a certification that the required
volume is available with adequate safety factor to include all solids expected to be
deposited in the ponds for the following year. Any changes to plant operations affecting
such certification shall be reported to the Director within five days.
NOTE: In the event that adequate volume has been certified to exist for the term of the
permit, periodic certification is not needed.
A. (21.) CHEMICAL METAL CLEANING WASTES
[40 CFR 4231
It has been demonstrated that under certain conditions it is possible to reduce the
concentration of metals in boiler cleaning wastes in the range of 92 to 99+ percent by
treatment in ash ponds. Because of dilution problems, and the existence of boundary
interface layers at the extremities of the plume, it is difficult to prove beyond doubt that
the quantity of iron and copper discharged will always be less than one milligram per
liter times the flow of metal cleaning when treated in this manner.
The application of physical/ chemical methods of treating wastes has also been
demonstrated to be effective in the treatment of metal cleaning wastes. However, the
effectiveness of ash pond treatment should be considered in relation to the small
differences in effluent quality realized between the two methods.
It has been demonstrated that the presence of ions of copper, iron, nickel, and zinc in
the ash pond waters was not measurably increased during the ash pond equivalency
demonstration at the Duke Energy's Marshall Steam Station. Therefore, when the
following conditions are implemented during metal cleaning procedures, effective
treatment for metals can be obtained at this facility:
(1) Large ash basin providing potential reaction volumes.
(2) Well-defined shallow ash delta near the ash basin influent.
(3) Ash pond pH of no less than 6.5 prior to metal cleaning waste addition.
(4) Four days retention time in ash pond with effluent virtually stopped.
(5) Boiler volume less than 86,000 gallons.
(6) Chemicals for cleaning to include only one or more of the following:
(a) Copper removal step- sodium bromate, NaBr03; ammonium carbonate,
(NH4)2CO3; and ammonium hydroxide, NH40H.
(b) Iron removal step -hydrochloric acid, HCl; and ammonium bifluoride, (NH4)BF2
and proprietary inhibitors.
(7) Maximum dilution of wastes before entering ash pond 6 to 1.
(8) After treatment of metal cleaning wastes, if monitoring of basin effluents as required
by the permit reveals discharges outside the limits of the permit, the permittee will
re -close the basin discharge, conduct such in -basin sampling as necessary to
determine the cause of nonconformance, will take appropriate corrective actions,
and will file a report with EPA including all pertinent data.
A. (22.) FLOATING MATERIALS
[NCGS 143-215.1 (b)]
Page 19 of 25

i
I PERMIT No. NC0004987
I
I
The Permittee shall report all �yisible discharges of floating materials, such as an oil
sheen, to the Director when submitting DMRs.
A. (23.) CHEMICAL DISCHARGES I
[NCGS 143-215.1 (b)] i
I
Discharge of any product registered under the Federal Insecticide, Fungicide, and
Rodenticide Act to any waste stream which may ultimately be released to lakes, rivers,
streams or other waters of the United States is prohibited unless specifically authorized
elsewhere in this permit. Discharge of chlorine from the use of chlorine gas, sodium
hypochlorite, or other similar chlorination compounds for disinfection in plant potable
and service water systems and inl sewage treatment is authorized. Use of restricted use
pesticides for lake management purposes by applicators licensed by the N.C. Pesticide
Board is allowed.
A. (24.) PRIORITY POLLUTANT ANALYSIS - OUTFALL 002
[NCGS 143-215.1 (b)]
The Permittee shall conduct a priority pollutant analysis (in accordance with 40 CFR
Part 136) once per permit cycle at outfall 002 and submit the results with the application
for permit renewal.
A. (25.) WAIVERS
[NCGS 143-215.1 (b)]
Nothing contained in this permit
right to a hearing it may have pur
A. (26.) STRUCTURAL INTEGRITY
[ 15A NCAC 02K.02081
The facility shall meet the dam
2K.
L be construed as a waiver by permittee or any
t to State or Federal laws or regulations.
OF ASH POND DAM
and dam safety requirements per 15A NCAC
A. (27.T CLEAN WATER ACT SECTION 316(x) THERMAL VARIANCE
[40 CFR 125, Subpart H]
The thermal variance granted under S'(
NPDES permit. Should the permittee
variance beyond the term of this permi
submitted in accordance with 40 CFR
not later than 180 days prior to permit
for continuation such as a) plant opera
and are expected to remain so for the t
changes to plant discharges or other di
interact with the thermal discharges; a
community of the receiving water body
determination.
ction 316(a) terminates on expiration of this
rish a continuation of its 316(a) thermal
:, reapplication for such continuation shall be
'art 125, Subpart H and Section 122.21(1) (6)
expiration. Reapplication shall include a basis
Ling conditions and load factors are unchanged
Irm of the reissued permit; b) there are no
scharges in the plant site area which could
id c) there are no changes to the biotic
which would impact the previous variance
Paye 20 of 25

PERMIT No. NC0004987
The next 316(a) studies shall be performed in accordance with the Division of Water
Resources approved plan. The temperature analysis and the balanced and indigenous
study plan shall conform to the specifications outlined in 40 CFR 125 Subpart H, the
EPA's Draft 316(a) Guidance Manual, dated 1977, and the Region 4 letter to NCDENR,
dated June 3, 2010. EPA shall be provided an opportunity to review the plan prior to
the commencement of the study.
Copies of all the study plans, study results, and any other applicable materials should
be submitted to:
1) Electronic Version Only (pdf and CD)
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
2) Electronic Version (pdf and CD) and Hard Copy
Division of Water Resources
Water Sciences Section
1621 Mail Service Center
Raleigh, NC 27699-1621
A. (28.) CLEAN WATER ACT SECTION 316 (B)
[40 CFR 125.95]
The permittee shall comply with the Cooling Water Intake Structure Rule per 40 CFR
125.95. The permittee shall submit all the materials required by the Rule with the
next renewal application.
A. (29.) FISH TISSUE MONITORING NEAR ASH POND DISCHARGE — OUTFALL 002
[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 the monitoring is to evaluate
potential uptake of pollutants by fish tissue near the Ash Pond discharge. The
parameters analyzed in fish tissue shall be arsenic, selenium, and mercury. The
monitoring shall be conducted in accordance with the Sampling Plan approved by the
Division. The plan should be submitted to the Division within 180 days from the effective date
of the permit. Upon approval, the plan becomes an enforceable part of the permit.
Copies of all the study plans, study results, and any other applicable materials should be
submitted to:
1) Electronic Version Only (pdf and CD)
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
2) Electronic Version (pdf and CD) and Hard Copy
Division of Water Resources
Water Sciences Section
1621 Mail Service Center
Page 21 of 25

PERMIT No. NC0004987
Raleigh, NC 27699-1621
A. (30.) INSTREAM MONITORING
[ 15A NCAC 0213.0500 ET SEQ.]
The facility shall conduct semiannual instream monitoring (approximately one mile
upstream and approximately one mile downstream of the ash pond discharge) for
arsenic, selenium, mercury (method 1631E), chromium, lead, cadmium, copper, zinc,
bromide, total hardness, and total dissolved solids (TDS). Instream monitoring should
be conducted at the stations that have already been established through the BIP
monitoring program. The monitoring results shall be reported on the facility's Discharge
Monitoring Reports and included with the NPDES permit renewal application.
A. (31.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[G.S. 143-215.1(b)] I
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 su
Part H of this permit (Standard C
1.
• Section B. Signatory F
(11.)
• Section D. (2.) Reporting
• Section D. (6.) Records Re
• Section E. (5.) Monitoring
The permittee shall report d:
DWR's Electronic Discharge
Monitoring results obtained during
each month and submitted electroi
permitted facilities to enter monitor
the internet. Until such time that i
EPA's Cross -Media Electronic Repo
required to submit all discharge mi
eDMR and will be required to comr
and submitting one signed original
the following address:
s or supersedes the following sections within
for NPDES Permits) :
is
ction E.
monitoring data electronically using the NC
ng Report (eDMR) internet application.
the previous month(s) shall be summarized for
ically using eDMR. The eDMR system allows
[ng data and submit DMRs electronically using
rie state's eDMR application is compliant with
-ting Regulation (CROMERR), permittees will be
nitoring data to the state electronically using
�ete the eDMR submission by printing, signing,
and a copy of the computer printed eDMR to
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Paye 22 of 25

PERMIT No NC0004987
If a permittee is unable to use the eDMR system due to a demonstrated hardship
or due to the facility being physically located in an area where less than 10 percent
of the households have broadband access, then a temporary waiver from the
NPDES electronic reporting requirements may be granted and discharge
monitoring data may be submitted on paper DMR forms (MR 1, 1. 1, 2, 3) or
alternative forms approved by the Director. Duplicate signed copies shall be
submitted to the mailing address above. See "How to Request a Waiver from
Electronic Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the
month following the issuance of the permit or in the case of a new facility, on the
last day of the month following the commencement of discharge.
Starting on December 21, 2020, the permittee must electronically report the
following compliance monitoring data and reports, when applicable:
Sewer Overflow/Bypass Event Reports;
Pretreatment Program Annual Reports; and
Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How
to Request a Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial
recipient at the time of each electronic submission. The permittee should use the
EPA's website resources to identify the initial recipient for the electronic
submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities
means the entity (EPA or the state authorized by EPA to implement the NPDES
program) that is the designated entity for receiving electronic NPDES data [see 40
CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic
reporting tool for each type of electronic submission and for each state.
Instructions on how to access and use the appropriate electronic reporting tool will
be available as well. Information on EPA's NPDES Electronic Reporting Rule is
found at: https://www.federalregister.gov/documents/2015/10/22/2015-
24954 /national-pollutant-discharge-elimination-system-npdes-electronic-
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
Page 23 of 25

PERMIT No. NC 0004987
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: / / deg.nc. gov /about/ divisions /water -resources / edmr
4. Signatory Requirements [Supplements Section B. (11.1 (b) and Supersedes
Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person
described in Part II, Section B. (11.)(a) or by a duly authorized representative of
that person as described in Part II, Section B. (11.)(b). A person, and not a
position, must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain
an eDMR user account and login ,credentials to access the eDMR system. For more
information on North Carolina's eDMR system, registering for eDMR and obtaining
an eDMR user account, please visit the following web page:
http://deg.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR
system shall make the following certification [40 CFR 122.22]. NO OTHER
STATEMENTS OF CERTIFICATION, WILL BE ACCEPTED:
"I certify, under penalty of law, thaiffiis document and all attachments were
prepo_red 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
thosepersons directly responsible four 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. "
Page 24 of 25

PERMIT No NC0004987
5. Records Retention jSupplements Section D. (6.11
The permittee shall retain records of all Discharge Monitoring Reports, including
eDMR submissions. These records or copies shall be maintained for a period of at
least 3 years from the date of the report. This period may be extended by request
of the Director at any time [40 CFR 122.41].
A. (32.) COMPLIANCE BOUNDARY
[ 15A NCAC 02L.0107]
The compliance boundary for the disposal system shall be specified in accordance with
15A NCAC 02L .0107(a) or (b) dependent upon the date permitted. An exceedance of
groundwater standards at or beyond the compliance boundary is subject to
remediation action according to 15A NCAC 02L .0106(c), (d), or (e) as well as
enforcement actions in accordance with North Carolina General Statute 143-215.6A
through 143-215.6C.
Page 25 of 25

002A and 002B
001
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Facility
Outfall Information
Outfall #:
001
Outfall #:
002A and 002B
Receiving Stream:
Catawba River
Receiving Stream:
Catawba River
Latitude:
35°35'43"
Latitude:
35°35'51"
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Longitude:
80°57'36"
Longitude for 002B:
80057'34"
Outfall #:
002
Outfall #:
005
Receiving Stream:
Catawba River
Receiving Stream:
Catawba River
Latitude:
35°36'21"
Latitude:
35°35'58"
Longitude:
80°57'35"
Longitude:
80°57'50"
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Facility
Outfall Information
Outfall #:
001
Outfall #:
002A and 002B
Receiving Stream:
Catawba River
Receiving Stream:
Catawba River
Latitude:
35°35'43"
Latitude:
35°35'51"
Longitude:
80°57'52"
Longitude:
80°57'36"
Longitude for 002B:
80057'34"
Outfall #:
002
Outfall #:
005
Receiving Stream:
Catawba River
Receiving Stream:
Catawba River
Latitude:
35°36'21"
Latitude:
35°35'58"
Longitude:
80°57'35"
Longitude:
80°57'50"
Facility
Location
North
Outfall #: 007
Duke Energy, LLC
Receivine Stream: Catawba
NC0004987
Latitude: 35°36'22"
LOneitude: 80°57'32"
Marshall Steam Station