NCS000347_Renewal Application_20171101

Capital Power Corporation
331 Allie Clay Roar!
Roxboro, NC 27573
336-330.4500
www.capitzilL)ower.com
October 25, 2017
SW Individual Permit Coverage Renewal
Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612
RE: Renewal Applicati n Amendment
National Pollutant b4schar ination System
Stormwater Individual Permit
NPDES Permit Number NCS000347
Capital Power — Roxboro Plant
Roxboro, Person County, North Carolina
Dear Sir/ Madam:
Capital Power
Corporation
CERTIFIED MAIL
Capital Power applied to your office on January 22, 2015 for renewal of Stormwater Individual
Permit Number NCS000347 (issued in July 2010) for our CPI Roxboro, NC plant.
Capital Power is submitting two (2) copies of the attached amendment to our January 2015
renewal application for clarification purposes. The amendment contains the following updated
items: Renewal Application Form, Site Plan, and narrative description of significant changes in
industrial activities.
Should you have any questions, or need additional information, please contact me or Ms. Ginny
Grace at [phone].
Sincerely,
CPI USA NORTH CAROLINA LLC
Frank ayward
CPI Roxboro - Plant Manager
cc: Ms. Ginny Grace, CPI Senior Advisor, Environment
Attachment - (2 copies)

Renewal Application - Amendment
National Pollutant Discharge Elimination System
Stormwater Individual Permit
NPDES Permit Number NCS000347
Capital Power — CPI Roxboro Plant
October 25, 2017
A-1

Permit Coverage
I// Y)
Rejiewal Ai)jIlicataoiri Foriiii
14CDENp National Pollutant !Discharge Elimination System NPDES Permit Number
Stonirnwater Individual Permit NCS000347
Please provide your permit number in box in the upper right hand corner, complete the information in the, space provided
below and return the completed renewal form along with the required supplemental infor
mation to the address indicated.
Owner Information
* Addre,zs to which petmit colnespondencewill be mailed
Owner / Organization Name:
CPI USA North Carolina LLC
Owner Contact.,
Frank Hayward, Plant Manager -
Mailing Address-
331 Al lie Clay Road
Roxboro, NC 27573
Phone Number:
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Facility Information
Facility Name:
Facility Physical Address:
Facility Contact,
Mailing Address,
CPI USA North Carolina — Roxboro Plant V/
331 Allie Clay Road
Roxboro, NC 27573
Frank Hayward, Plant Manager
P.O. Box 1153
Roxboro, NC 27573
Phone Number-
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Permit Information
Permit Contact:
Virainia Grace
Mailing Address,
1281 Powerhouse. Dive SE
Southport, NC 28461-3155
Phone Number:
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Discharcie Information
Receiving Stream: unnamed tributary to Mitchell Creek
Stream Class- C
Basin: Roanoke, River
Serb -Basin: ROA05
Number of Outfalls: 3
Facility[Activity Chanaes Please describe below any changes to your facility or activities since issuance of your permit, Attached a
separate sheet if necessary.
Changes are described in the attached sheet
CERTIFICATION
I certify that I am familiar with ble information contained in the application and that to the best of my knowledge and belief
such information �istru mplete at accurate.
Signature Date
If M'd I
Print or type name of person signing above
Plant Manager
Title
SW Individual Permit Coverage Renewal
Please return this completed application form: Stormwater Permittinq Program
and requested supplemental information to: 1612 Mail Service Center
Raleigh, North Carolina 27699-1612

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Significant Changes in Industrial Activities
Within the past eight years, the Roxboro facility has installed a new truck dumper and wood
conveyor system in Drainage Area 4, and the facility has increased the quantity of wood fuel that
is handled and stored on -site. The stormwater from this drainage area flows into an intermittent
stream that flows onto plant property from the south, and then exits plant property to the north,
just outside the northern property boundary. Also, a new double -walled 1,000-gallon storage
tank is used to dispense diesel fuel. This tank is located on the Cooling Tower Pad.
An earlier version of the site's Stormwater Pollution Prevention Plan (SWPPP) referred to two
internal stormwater outfalls, 002 and 003, in Drainage Area 4. However, construction of the new
truck dumper added new plant roads and resulted in significant topography changes in this
drainage area, creating two new internal stormwater outfalls which replaced Outfalls 002 and
003. The on -site wastewater basin discharge is covered by a different NPDES permit, and
discharges through Wastewater Outfall 003.
To avoid confusion, the site has assigned the numbers 002 and 004 to the new stormwater
outfalls located within the site boundary. These internal outfalls are included in the revised Site
Map. Both 002 and 004 ultimately discharge through an outfall located offsite for which Capital
Power has no access for sampling purposes.
Because of potential contamination associated with runoff from adjacent properties for which
Capital Power has no control into stormwater outfalls 002 and 004, we are proposing to continue
to collect analytical samples only at stormwater outfall 001 which discharges offsite.
Stormwater outfalls 002 and 004 will be qualitatively monitored visually, and site activities in
surrounding drainage areas will continue to follow Best Management Practices (BMP's) to
reduce impacts to offsite outfall discharge.
A-4

Capital Power
Capital Power Corpo: ation Corporation
P0Box 1153
331 Aiiie clay Road
Roxboro, NC 27573
snww.cap;talpovver.com
January 22, 2015
SW Individual Permit Coverage Renewal
Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612
RE: Rene -,,a] Application
National Pollutant Discharge Elimination System
Stormwater Individual Permit
NPDES Permit Number NCS000347
Capital Power — Roxboro Plant
Roxboro, Person County, North Carolina
Enclosed please find two copies of the renewal application for Stormwater Individual Permit
Number NCS000347 for our Roxboro, NC plant.
Should you have any questions, or need additional information, please contact Virginia Grace at
[phone].
Sincerely,
CPI USA NORTH CAROLINA LLC
Frank Hayward
Plant Manager
Enclosures
cc: Virginia Grace, Capital Power
Connie Pigg, Capital Power
RECEIVED
AN 27 2015
DENR-LAND QUALITY
STORMUWATER PEA IA11 ING

Permit Coverage
AGARenewal Application Form NPDES Permit Number
NCDENR National Pollutant Discharge Elimination System
Stormwater Individual Permit NCS000347
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information
* Address to which permit correspondence w111 be mailed
Owner / Organization Name:
CPI USA North Carolina LLC
Owner Contact:
Frank Hayward, Plant Manager
Mailing Address:
331 Allie Clay Road
Roxboro, NC 27573
Phone Number:
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Facility Information
Facility Name:
CPI USA North Carolina — Roxboro Plant
Facility Physical Address:
331 Allie Clay Road
Roxboro, NC 27573
Facility Contact:
Frank Hayward, Plant Manager
Mailing Address:
P.O. Box 1153
Roxboro, NC 27573
Phone Number:
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Permit Information
Permit Contact:
ry � � � � k Q�
Virginia Grace ¢ ;E
Mailing Address:
1281 Powerhouse Drive SE
3¢r
Southport, NC 28461-3155 JAN 2 7 Lg3 it)
Phone Number:
910 343-6711
Fax Number:
[phone] DENR-LAND rQU)' l ITY
E-mail address:
[e-mail] 5T RfUiU"JP,7ER PERIVIhi"FiNG
Discharge Information
Receiving Stream:
unnamed tributary to Mitchell Creek
Stream Class:
C
Basin:
Roanoke River
Sub -Basin:
ROA05
Number of Outfalls:
1
Facility/Activity Changes Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
Changes are described in the attached sheet
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief
such information is true;-c mplete and accurate.
Signature l t Date 1 �,i J to
Frank-Havward Plant Manager
Print or type name of person signing above
Please return this completed application form
and requested supplemental information to:
Title
SW Individual Permit Coverage Renewal
Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612

SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL
NPDES STORMWATER PERMIT
Two copies of each of the following shall accompany this submittal in order for the application
to be considered complete:
(Do not submit the site Stormwater Pollution Prevention Plan)
Initials
TSW 1. A current Site Map from the Stormwater Pollution Prevention Plan. The location of
industrial activities (including storage of materials, disposal areas, process areas and
loading and unloading areas), drainage structures, drainage areas for each outfall,
building locations and impervious surfaces should be clearly noted.
TSW 2. A summary of Analytical Monitoring results during the term of the existing permit
(if your permit required analytical sampling). Do not submit individual lab reports.
The summary can consist of a table including such items as outfall number,
parameters sampled, lab results, date sampled, and storm event data.
TSW 3. A summary of the Visual Monitoring results. Do not submit individual monitoring
reports. The summary can consist of a table including such items as outfall number,
parameters surveyed, observations, and date monitoring conducted.
TSW 4. A summary of the Best Management Practices utilized at the permitted facility.
Summary should consist of a short narrative description of each BMP's in place at
the facility. If the implementation of any BMP's is planned, please include
information on these BMP's.
TSW 5. A short narrative describing any significant changes in industrial activities at the
permitted facility. Significant changes could include the addition or deletion of
work processes, changes in material handling practices, changes in material storage
practices, and/or changes in the raw materials used by the facility.
TSW 6. Certification of the development and implementation of a Stormwater Pollution
Prevention Plan for the permitted facility (Sign and return attached form).
If the final year analytical monitoring of the existing permit term has not been completed
prior to filing the renewal submittal, then the last years monitoring results should be submitted
within 30 days of receipt of the laboratory reports. (i.e. do not withhold renewal submittal
waiting on lab results)

STORMWATER POLLUTION PREVENTION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources - Stormwater Permitting
Facility Name:
Permit Number:
Location Address
County:
CPI USA North Carolina - Roxboro Plant
NCS000347
331 Allie Clay Road
Roxboro NC 27573
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all
attachments were developed and implemented under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information required by the SPPP.
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible
for gathering the information, the information gathered is, to the best of my knowledge and belief, true,
accurate and complete."
And
"I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP
has been fully implemented at this facility location in accordance with the terms and conditions of the
stormwater discharge permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
ISign (according to permit signatory requirements) and return this Certification. DO NOT.
SEND STORMWATER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION.
Signature
Frank
Print or type name of person signing above
Date i1,3D 0is
Plant Manager
Title
SPPP Certification 10/13

- 75
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CPI USA North Carolina, LLC - Roxboro Facility
ANALYTICAL MONITORING SUMMARY
DATE:
11/3/10
5/5/11
11/18/11
6/26/12
12/26/12
12/12/13
6/18/14
OUTFALL:
001
001
001
001
001
001
001
PARAMETER
UNITS
Ag
mg/L
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
As
mg/L
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
Be
mg/L
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.005
<0.005
Cd
mg/L
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.005
<0.005
Cr
mg/L
0.003
<0.001
0.003
<0.001
<0.001
0.004
0.016
Cu
mg/L
0.008
0.004
0.015
<0.002
0.003
0.005
0.004
Hg
mg/L
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
Ni
mg/L
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
Pb
mg/L
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
Sb
mg/L
<0.005
<0.005
<0.010
<0.005
<0.005
<0.005
<0.005
Se
mg/L
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
TI
mg/L
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
Zn
mg/L
0.060
0.014
0.277
0.050
0.012
0.054
0.048
Al
mg/L
2.03
<0.05
0.102
<0.05
<0.05
0.30
0.60
B
mg/L
0.026
<0.05
0.086
<0.05
<0.05
0.28
0.29
COD
mg/L
28
<10
46
no data
no data
36
31
TSS
mg/L
41
3.7
5.3
no data
no data
9.0
12.1
Sulfate
mg/L
6
18
46
no data
no data
352
352
Oil and Grease (0&G)
mg/L
<5.0
<5.0
<5.0
no data
no data
<5.0
21.0
pH
S.U.
6.5
6.8
6.4
6.8
6.6
6.7
6.8
Total Rainfall
inches
0.6
0.3
0.7
0.75
0.48
0.7
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BMP Summary
Table A, below, summarizes the BMPs used at the Roxboro plant
Potentially exposed materials at the Roxboro plant include coal, wood chips, tire derived fuel (TDF),
petroleum products stored in existing ASTs, water treatment chemicals, limestone, and ash.
Coal for the boiler plant is stored outside in the coal pile and coal pile runoff is treated in the low
volume wastewater system prior to discharge (i.e., it is not drained to the stormwater system). Coal is
brought in by rail at the west end of the plant and unloaded periodically through the coal chute and
transported via conveyor belt to the coal pile. The risk of coal dust entering the storm water via
fugitive dust exists and to minimize that risk, coal unloading BMPs are used and, because the drainage
adjacent to the rail bed is through vegetative buffers, the quantity of coal reaching the receiving water
is minimal. Water is sprayed, as needed, onto the coal as it is unloaded from the rail cars in one of the
coal unloading BMPs. Also, coal dust from the edges of the chute where coal is deposited is swept up
daily after unloading operations. These BMPs, coupled with the comparatively limited surface area
draining to the stormwater system in the western plant site, minimize fugitive dust transport.
The risk of the petroleum products entering the storm system is low due to the use of secondary
containment that conforms to 40 CFR 112.8(c)(2) and non-structural controls (e.g., routine
inspections) to prevent spills. Used oil is stored in two 300-gallon aboveground storage tanks (ASTs)
located at the Oil Storage Area. The used oil recycling vendor removes the used oil as needed. Diesel
is stored in a 300-gallon AST inside the Pump House and in a 1,000 gallon double -walled tank on the
Cooling Tower Pad. Diesel, gasoline, and kerosene are each stored in 300-gallon ASTs located Oil
Storage Area. There are dedicated unloading bays at both the Oil Storage Area and the Pump House
which are used during oil loading/unloading operations.
The several chemical storage units in the Demineralizer Building are all equipped with secondary
containment. Any spills would be routed to the Neutralization Tank and then the Wastewater Basin
for treatment. There is a dedicated unloading bay at the Demineralizer Building, and spill materials are
located inside the building. The Cooling Tower Chemical Building also has chemical storage areas
with a dedicated secondary containment pad, and any overflow from this pad would enter the
"V-ditch" leading to the Wastewater Basin.
The risk of ash or ash residue entering the storm system is low due to the use of non-structural controls
(i.e. an ash curtain and periodic sweeping/cleaning of the area). Each ash loading system is equipped
with a Dustmaster, which is a device designed to minimize fugitive dust due to the ash loading. When
the ash loading is complete, the ash loading area floor is manually swept/cleaned to avoid the tracking
of ash residue.
The risk of limestone entering the storm system is low due to the use of structural and non-structural
controls (i.e. the limestone silo and its blowers and piping are sealed, and limestone is removed from
equipment prior to maintenance). Limestone is pneumatically conveyed in closed lines. Any spills of
limestone will be promptly cleaned up.
Wood chips and TDF may spill from the truck dumper, conveyors, and radial stacker. The risk
of these materials contaminating stormwater is low due to the use of automatic sumps beneath

the truck dumper which convey accumulated stormwater to the Wastewater Basin. because
spilled materials are promptly cleaned up, and the paved areas are periodically swept.
Table A. InventoiyofMaterials Exposed to Precipitation
Materials Management
ractice and ContrGI
Stormwater
ocation
ExposedMaterial AmountMeasures
BMPsTreatment
Al - Underneath coal
Coal (de minimus)
Good housekeeping BWs
None
conveyor
Al - Ash Silo and ash
ly ash (indeterminate)
Good housekeeping BMPs
None
andling area
Al - Limestone Silo &
imestone
Sealed Tank, Blowers & Piping,
one
lower
( 800 tons capacity)
remove limestone from equipment
prior to maintenance
Al -Bucket Elevator
Wood chips (indeterminate)
Good housekeeping BMPs
one
ower
A2 - Transformer
Transformer oil (9,750-gal
Gravity discharge to Oil Trap Pit;
None
Yard
and 1,090-gal capacity)
Pumped to Wastewater Basin
A2 - Coal Pile
Coal (>1,000 tons)
Coal (indeterminate);
Discharge to Wastewater Basin
one
A2 - Rail Car Unloading
Discharge to Wastewater Basin;
one
Area
ntifreeze (two 55-gal drums)
antifreeze drums are equipped
with conforming secondary
containment
A2 - Wood Fuel Pad,
Wood chips (indeterminate)
Discharge to Wastewater Basin
None
Wood Conveyors Nos. 4
and 5, Unused Wood
Hopper and Conveyor
A2 — TDF Fuel Storage
Tire Chips ( 500+ tons
Discharge to Wastewater Basin
None
Pad
A2 - Cooling Tower
Proprietary chemicals and
Discharge to Wastewater Basin
None
Chemical Building
diesel fuel tank (1,000-
(Cooling Tower Pad)
al)
A3 - Demineralizer
one
None
None
Building
A3 - Materials
None
Containment with direct drainage
None
ransfer Bay (at
to Wastewater Basin
emineralizer Building)
A3 - Electric Fire
Transformer oil (125-gal
Conforming secondary
None
Pump Transformer
capacity)
Containment
A3 - Oil Trap Pit
Typically none (13,125-gal
Pumped to Wastewater Basin
None
capacity)
A3 - Oil Storage Area
Used oil, kerosene, gasoline,
Conforming secondary
None
and diesel fuel (each at 300-
Containment
al)

Table A. Inventory of Materials Exposed to Precipitation
aterials Management
ractice and Controi
Stormwater
F—Truck
x osed Material Amount
easures BMPs
reatment
etroleum (max. 2,000-gal).
Conforming secondary
.'
one
ng (at
Containment
a and East
umpHouse)
A3 - �spurCoal
(de minimus)
Good housekeeping BMPs
one
A4 - Truck Dumper,
Wood chips; TDF (de
Good housekeeping BMPs —
one
ood Conveyor Belts 1, 2,
inimus)
eriodic sweeping of pavement
and 3, part of the Wood
arped Fuel Delivery Trucks
Fuel Pad
p rap
A4 -
None
None
None
Warehouse/Maintenance
Building
A4 — TDF Fuel Storage
Tire Chips
None
None
Pad
Significant Changes in Industrial Activities
Within the past six years, the Roxboro facility has installed a new truck dumper and wood
conveyor system in Drainage Area 4, and the facility has increased the quantity of wood fuel that
is handled and stored on -site. The stormwater from this drainage area sheet flows into an
intermittent creek that flows to the west, just inside the northern property boundary. Also, a new
double -walled 1,000-gallon storage tank is used to dispense diesel fuel. This tank is located on
the Cooling Tower Pad.
An earlier version of the site's Stormwater Pollution Prevention Plan (SWPPP) referred to two
internal stormwater outfalls, 002 and 003, in Drainage Area 4. However, the stormwater from
these outfalls flows into an underground culvert through a drop inlet, where it combines with the
discharge from the on -site wastewater treatment plant prior to discharge off -site. The discharge
from the on -site wastewater treatment plant is covered by a different NPDES permit. As such, to
avoid confusion, the two internal stormwater outfalls are not shown in the site's current SWPPP,
nor are they shown on the enclosed Site Map.