NCS000348_Application_20141030

Permit Coverage
A► Ar Renewal Application Form
NCDENR National Pollutant Discharge Elimination System
Stormwater Individual Permit
NPDEPermit Number
N CS000348
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 will be mailed
Owner / Organization Name:
CPI USA North Carolina LLC
Owner Contact:
David Groves, Plant Manager
Mailing Address:
1281 Powerhouse Drive SE
IB
C bC���r EED
_Southport, NC 28461-3155
W
Phone Number:
[phone]
OCT
Fax Number:
[phone]
3 0 2014
E-mail address:
[e-mail]
DENR-LAND QUALITY
Facility Information
STORMWATER PERMI-I TIN
Facility Name:
CPI USA North Carolina — Southport Plant
Facility Physical Address:
1281 Powerhouse Drive SE
Southport, NC 28461-3155
Facility Contact:
David Groves, Plant Manager
Mailing Address:
P.O. Box 10836
Southport, NC 28461
Phone Number:
_(910) 343-6701
Fax Number:
_(910) 343-6710
E-mail address:
[e-mail]
Permit Information
Permit Contact:
Virginia Grace
Mailing Address:
1281 Powerhouse Drive SE
Southport, NC 28461-3155
Phone Number:
(91.0) 343-6711
Fax Number:
[phone]
E-mail address:
[e-mail]
Discharae Information
Receiving Stream: Duke Energy Cooling Water Canal
Stream Class: SB
Basin: Atlantic Ocean
Sub -Basin: NOT APPLICABLE
Number of Outfalls: 6
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 informatio is'tr e, c "fete and accurate.
Signature Date
David Groves Plant Manager
Print or type name of person signing above
Title
Please return this completed application form SW Individual Permit Coverage Renewal
Stormwater Permitting Program
and requested supplemental information to: 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)

North Carolina Division of Energy, Mineral, and Land Resources - Storm water Permitting
Facility Name: CPI USA North Carolina - Southport Plant
Permit Number: NCS000348
Location Address: 1281 Powerhouse Drive SE
Southport. NC 28461-3155
County:
Brunswick
"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."
s J
"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."
Signature
David Groves
Print or type name of person signing above
Date , `d I'
Plant Manager
Title
SPPP Certification 10/13

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DENR-LAND QUAL
STORMWATER PERM
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CPI USA North Carolina, LLC - Southport Facility
ANALYTICAL MONITORING SUMMARY
DATE:
9/27/10
7/8/11
3/19/12
10/1/12
4/12/13
10/7/13
4/8/14
OUTFALL WITH FLOW:
1
1
1
1
1
1
1
PARAMETER
UNITS
Ag
mg/L
<0.010
<0.01
<0.010
<0.02
<0.010
<0.010
<0.010
As
mg/L
<0.010
<0.010
<0.010
<0.02
0.016
0.010
<0.010
Be
mg/L
<0.010
<0.01
<0.010
<0.004
<0.010
<0.010
<0.010
Cd
mg/L
<0.010
<0.01
<0.010
<0.005
<0.010
<0.010
<0.010
Cr
mg/L
<0.010
<0.01
<0.010
<0.02
0.027
0.030
<0.010
Cu
mg/L
<0.010
<0.01
<0.010
0.025
0.133
0.079
<0.010
Hg
mg/L
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
Ni
mg/L
<0.010
<0.01
<0.010
<0.02
0.035
0.032
<0.010
Pb
mg/L
<0.010
<0.01
<0.010
<0.015
0.072
0.020
<0.010
Sb
ing/L
<0.010
<0.01
<0.010
<0.02
0.01G
<0.010
<0.010
Se
mg/L
<0.010
0.036
0.013
<0.02
<0.010
<0.010
<0.010
TI
mg/L
<0.010
<0.01
<0.010
<0.02
<0.010
<0.010
<0.010
Zn
mg/L
0.071
2.12
0.564
4.00
20.0
6.30
0.079
Al
mg/L
0.430
0.775
0.282
3.90
4.32
10.6
0.175
B
mg/L
0.053
0.242
0.189
0.142
0.041
0.042
0.036
COD
mg/L
41
<20
31
79
442
280
35
TSS
mg/L
4.9
16.5
4.2
79
236
254
7.8
Sulfate
mg/L
26
132
179
60
90
38
50
Oil and Grease (0&G)
mg/L
<5
<5
<5
<5
<5
<5
<5
pH
S.U.
7.4
7.3
7.85
6.96
no data
7.74
7.79
Total Rainfall
inches
5.65
0.78
0.33
1.10
1.34
0.84
0.84

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BMP Summary
Table A, shown below, provides a list of the BMPs used at the Southport plant.
Potentially exposed materials at the Southport plant include coal, wood chips, tire derived fuel (TDF),
petroleum products stored in existing ASTs, water and wastewater 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 north end of the plant and unloaded 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 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 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 a 300-gallon aboveground storage tank (AST)
located at inside the Boiler Building's Oil Storage Room, with full volume secondary containment.
Diesel is stored in a 300-gallon AST outside the Pump House, in a 1,000-gallon AST located within
the Rail Car Unloading Area, and in a 300-gallon AST near Truck Dumper 2, and each tank is
equipped with full volume secondary containment. Gasoline is stored in a 30-gallon dispenser located
in the Gasoline and Drum Storage Area which is also equipped with full volume secondary
containment. Small tanks of turbine lube oil and hydraulic oil are located on the site, as well as
transformers containing oil. Any spillage from these tanks and transformers would normally be
contained.
Chemical storage and usage is limited to the Wastewater Basin (drums and totes containing chemicals
are stored outside, equipped with secondary containment), the Demineralizer Building area, the R.O.
Building area, and the Cooling Tower Chemical Storage Area. The several chemical storage units in
the Demineralizer Building are all equipped with secondary containment and, any spills are routed to
the Neutralization Tank and then the Wastewater Basin for treatment. Spill cleanup materials are
located inside the Warehouse and the R.O. Building. There is a dedicated Unloading Bay at the
Demineralizer Building. All chemicals used in the R.O. Building are stored in secondary
containment. A temporary tank designed to store bleach for treating well water is located within
containment just outside the R.O. Building. Chemicals stored in the Cooling Tower Chemical Storage
Area are equipped with full volume secondary containment.
The risk of ash or ash residue entering the storm system is low due to the use of curbs and good
housekeeping practices including routine street sweeping/vacuum cleaning. 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.

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 trucks on paved or gravel roads, the truck dumpers,
conveyors, and radial stacker. The risk of these materials contaminating stormwater is low
because stormwater from the access road flows through a sand filter to remove TSS from the
water before it is discharged off -site. State Stormwater Management Permit No. SWS 090511
includes operating and maintenance procedures for the sand filter. That permit was issued on
7-19-2013. In addition, any stormwater from bermed TDF and wood storage areas is diverted to
the waste treatment basins. Trucks are covered, tarped, or enclosed when not being loaded or
unloaded, and paved roads are swept periodically. Spilled materials are promptly cleaned up.

Table A. Inventory of Materials Exposed to Precipitation
Materials Management
Practice and Control
Stormwater
Location
Exposed Material (Amount)
Measures (BMPs)
Treatment
DAl and DA7 - Ash Silos
Fly ash (indeterminate)
Good housekeeping BMPs, wet
None
and ash
slurry loading systems
unloading stations
Al and DA7 - Limestone
Limestone
Sealed storage, Blowers & Piping,
None
Storage & Blowers
remove limestone from equipment
prior to maintenance
Al and DA7 -
Coal, Wood, TDF
Good housekeeping BMPs
None
Conveyors and Conveyor
(de minimis)
Tower
DA1 and DA7 — Paved
Wood; TDF; trash
Trucks covered, tarped, or
None
Roads
(indeterminate)
enclosed when not being loaded or
unloaded; roads swept
A2 - Transformer
Transformer oil (2 at 9,750-gal
Gravity discharge to Oil Trap Pit;
None
Yards
and 2 at 1,090-gal capacity)
oil is removed; accumulated
stormwater is pumped to
Wastewater Basin
A2 - Coal Storage
Coal (>1,000 tons)
Discharge to Wastewater Basin
None
A2 — Storage and
Wood chips (indeterminate)
Discharge to Wastewater Basin
None
conveying of wood
A2 — TDF Fuel Storage
Tire Chips ( 500+ tons)
Discharge to Wastewater Basin
None
Pad
A3 - Cooling Towers
None
None
Runoff from this area of
the cooling towers is
treated in sand filter
A3 - Cooling Tower
Proprietary chemicals (1,000-
Containment
Sand filter
Chemical Storage Areas
gal)
DA3 — Paved and gravel
Wood chips; TDF;
Hydraulic Oil Tank - Partial roof
Sand filter, Hyd. Oil
roads, Truck Dumper 1,
Hydraulic Oil Tank (700-gal
and conforming secondary
Tank containment is
wood unloading conveyors
capacity)
containment; paved roads swept
drained to Oil Trap Pit
A3 - Truck Dumper 2
Wood chips; TDF;
Hydraulic Oil Tank and Diesel
None
Hydraulic Oil Tank (320-gal
fuel tank - Conforming secondary
capacity); Diesel fuel tank
containment
(300-gallon capacity)
DA3 - Rail Car Unloading
Coal (indeterminate); Diesel
Coal unloading - covered with
None
Area
fuel tank (1,000-gallon
roof Fuel tank and hydraulic fluid
capacity); hydraulic fluid
reservoir - equipped with
reservoir (30 gallon capacity)
conforming secondary
containment
A3 — near Coal
Coal (de minimis)
Good housekeeping BMPs for
None
Conveyor and Railroad Spur
area beneath conveyor and around
railroad spur

Table A. Inventory of Materials Exposed to Precipitation
Materials Management
Practice and Control
Stormwa ter
Location
Exposed Material (Amount)
Measures (BMPs)
Treatment
A3 — Switch Yard
Sulfur hexafluoride— gas
None
Sand filter
A3 - Oil Trap Pit
Typically none (12,160-gal
Oil is removed; accumulated
None
capacity)
stormwater is pumped to
Wastewater Basin
A4 - Cooling Towers
None
None
None
A5 - Condensate Storage
None
None
None
Tank
A5 - Demineralizer
None
None
None
Building
A5 — Neutralization
None
None
None
Tank
AS — Pump House
Diesel fuel tank (300-gallon
Conforming secondary containment
None
capacity)
A5 — Reverse Osmosis
None
None
None
Building
A5 — Water Tanks (used
None
None
None
for raw water storage)
A5 — Paved roads and
Wood; TDF; trash
Trucks covered, tarped, or
None
rash dumpsters
(indeterminate)
enclosed when not being loaded or
unloaded; roads swept
A6
New and used equipment
None
None
storage outside
A7 — Electric Fire
Transformer oil (125-gallon
Conforming secondary
None
Pump Transformer
capacity)
containment
A7 - Unloading Bay (at
None
Containment; discharge via
None
emineralizer Building)
Derain. Building sump to
Wastewater Basin
A7 — Drum Storage
Miscellaneous drums
Containment; discharge via Demin.
None
Area
(indeterminate)
Building sump to Wastewater Basin
aydown Yard Areas
Extra material — mostly metal
None
None
piping and wood

Significant Changes in Industrial Activities
On 7-19-2013, NCDENR issued State Stormwater Management Permit No. SWS 090511, which
authorized the construction of a permanent sand filter. The sand filter includes operation and
maintenance conditions which are incorporated into that permit, and the filter controls the TSS
discharged in stormwater from some pervious and impervious areas within Drainage Area 3, that
are associated with equipment that was installed to reduce emissions from the boilers at the site.
Stormwater that has been treated by the new sand filter is discharged through
Stormwater Outfall No. 3 (003).
A new stormwater outfall, Stormwater Outfall No. 6 (006) serving Drainage Area 7, was created
during a facility improvement project. This outfall is an internal outfall which discharges
stormwater into the ditch which drains through existing Stormwater Outfall No. 5 (005).

u
CPI USA North Carolina LLC
1281 Powerhouse Dr. SE
Southport, NC 28461
T 910-343-6700 F 910-343-6710
October 28, 2014
SW Individual Permit Coverage Renewal
Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612
RE: Renewal Application
National Pollutant Discharge Elimination System
Stormwater Individual Permit
NPDES Permit Number NCS000348
Capital Power — Southport Plant
Southport, Brunswick County, North Carolina
Capital Power
Corporation
Enclosed please find two copies of the renewal application for Stormwater Individual Permit
Number NCS000348 for our Southport, NC plant.
Should you have any questions, or need additional information, please contact Virginia Grace at
[phone].
Sincerely,
CPI USA NORTH CAROLINA LLC
David H. Groves
Plant Manager — Southport
Enclosures
cc: Virginia Grace, CPI Southport
Alan Morse, CPI Southport
Ted White, RTP Environmental Associates, Inc.
RECEIVED
tic 1 10 2014
STORMWATER PERM17.1 ING

CPI USA North Carolina LLC
1281 Powerhouse Dr. SE
Southport, NC 28461
T 910-343-6700 F 910-343-6710
October 28, 2014
SW Individual Permit Coverage Renewal
Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612
RE: Renewal Application
National Pollutant Discharge Elimination System
Stormwater Individual Permit
NPDES Permit Number NCS000348
Capital Power — Southport Plant
Southport, Brunswick County, North Carolina
Capital Power
Corporation
Enclosed please find two copies of the renewal application for Stormwater Individual Permit
Number NCS000348 for our Southport, NC plant.
Should you have any questions, or need additional information, please contact Virginia Grace at
[phone].
Sincerely,
CPI USA NORTH CAROLINA LLC
CD4avid(Groves
Plant Manager — Southport
RECEIVED
Enclosures
OCT 3 0 2014
cc: Virginia Grace, CPI Southport
0ENR•LAND QUALITY
Alan Morse, CPI Southport
STOR WATER PERMITTING
Ted White, RTP Environmental Associates, Inc.

Hermit Coverage
Renewal Application Form
AMI
NCDENR National Pollutant Discharge Elimination System
Stormwater Individual Permit
NPDES Permit Number
NCS000348
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 will be mailed
Owner / Organization Name:
CPI USA North Carolina LLC
Owner Contact:
David Groves, Plant Manager
Mailing Address:
1281 Powerhouse Drive SE
NC 28461-3155
RECEIVEDSouthport,
Phone Number:
[phone]
Fax Number:
[phone]
OCT 3 0 2014
E-mail address:
[e-mail]
DENR-LAND QUALITY
Facility Information
STORMWATER PERMITTING
Facility Name:
CPI USA North Carolina — Southport Plant
Facility Physical Address:
1281 Powerhouse Drive SE
Southport, NC 28461-3155
Facility Contact:
David Groves, Plant Manager
Mailing Address:
P.O. Box 10836
Southport, NC 28461
Phone Number:
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Permit Information
Permit Contact:
Virginia Grace
Mailing Address:
1281 Powerhouse Drive SE
Southport, NC 28461-3155
Phone Number:
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Discharge Information
Receiving Stream:
Duke Energy Cooling Water Canal
Stream Class:
SB
Basin:
Atlantic Ocean
Sub -Basin:
NOT APPLICABLE
Number of Outfalls:
6
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 informatio fir, co lete and accurate. I
Signature6 Date (� /2 t� ! /
David Groves Plant Manager
Print or type name of person signing above
Title
SW Individual Permit Coverage Renewal
Please return this completed application form Stormwater Permitting Program
and requested supplemental information to: 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)

North Carolina Division of Energy, Mineral, and Land Resources - Stormwater Permitting
Facility Name: CPI USA North Carolina - Southport Plant
Permit Number: NCS000348
Location Address: 1281 Powerhouse Drive SE
Southport, NC 28461-3155
County: Brunswick
"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."
Sign (according to'permt signatory requirements) and return th;
SEND STORMWATER POLLUTION PREVENTION PLAN VG
Signature \, rij
David Groves
Print or type name of person signing above
tification. DO NOT
PHI.0 CF.RTTFTf ATYnN
Date `D
Plant Manager
Title
SPPP Certification 10/13

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STQRMWATER PERMMI
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CPI USA North Carolina, LLC - Southport Facility
ANALYTICAL MONITORING SUMMARY
DATE:
9/27/10
7/8/11
3/19/12
10/1/12
4/12/13
10/7/13
4/8/14
OUTFALL WITH FLOW:
1
1
1
1
1
1
1
PARAMETER
UNITS
Ag
mg/L
<0.010
<0.01
<0.010
<0.02
<0.010
<0.010
<0.010
As
mg/L
<0.010
<0.010
<0.010
<0.02
0.016
0.010
<0.010
Be
mg/L
<0.010
<0.01
<0.010
<0.004
<0.010
<0.010
<0.010
Cd
mg/L
<0.010
<0.01
<0.010
<0.005
<0.010
<0.010
<0.010
Cr
mg/L
<0.010
<0.01
<0.010
<0.02
0.027
0.030
<0.010
Cu
mg/L
<0.010
<0.01
<0.010
0.025
0.133
0.079
<0.010
Hg
mg/L
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
Ni
mg/L
<0.010
<0.01
<0.010
<0.02
0.035
0.032
<0.010
Pb
mg/L
<0.010
<0.01
<0.010
<0.015
0.072
0.020
<0.010
Sb
mg/L
<0.010
<0.01
<0.010
<0.02
0.016
<0.010
<0.010
Se
mg/L
<0.010
0.036
0.013
<0.02
<0.010
<0.010
<0.010
TI
mg/L
<0.010
<0.01
<0.010
<0.02
<0.010
<0.010
<0.010
Zn
mg/L
0.071
2.12
0.564
4.00
20.0
6.30
0.079
Al
mg/L
0.430
0.775
0.282
3.90
4.32
10.6
0.175
B
mg/L
0.053
0.242
0.189
0.142
0.041
0.042
0.036
COD
mg/L
41
<20
31
79
442
280
35
TSS
mg/L
4.9
16.5
4.2
79
236
254
7.8
Sulfate
mg/L
26
132
179
60
90
38
50
Oil and Grease (0&G)
mg/L
<5
<5
<5
<5
<5
<5
<5
pH
S.U.
7.4
7.3
7.85
6.96
no data
7.74
7.79
Total Rainfall
inches
5.65
0.78
0.33
1.10
1.34
0.84
0.84

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BMP Summary
Table A, shown below, provides a list of the BMPs used at the Southport plant.
Potentially exposed materials at the Southport plant include coal, wood chips, tire derived fuel (TDF),
petroleum products stored in existing ASTs, water and wastewater 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 north end of the plant and unloaded 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 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 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 a 300-gallon aboveground storage tank (AST)
located at inside the Boiler Building's Oil Storage Room, with full volume secondary containment.
Diesel is stored in a 300-gallon AST outside the Pump House, in a 1,000-gallon AST located within
the Rail Car Unloading Area, and in a 300-gallon AST near Truck Dumper 2, and each tank is
equipped with full volume secondary containment. Gasoline is stored in a 30-gallon dispenser located
in the Gasoline and Drum Storage Area which is also equipped with full volume secondary
containment. Small tanks of turbine lube oil and hydraulic oil are located on the site, as well as
transformers containing oil. Any spillage from these tanks and transformers would normally be
contained.
Chemical storage and usage is limited to the Wastewater Basin (drums and totes containing chemicals
are stored outside, equipped with secondary containment), the Demineralizer Building area, the R.O.
Building area, and the Cooling Tower Chemical Storage Area. The several chemical storage units in
the Demineralizer Building are all equipped with secondary containment and, any spills are routed to
the Neutralization Tank and then the Wastewater Basin for treatment. Spill cleanup materials are
located inside the Warehouse and the R.O. Building. There is a dedicated Unloading Bay at the
Demineralizer Building. All chemicals used in the R.O. Building are stored in secondary
containment. A temporary tank designed to store bleach for treating well water is located within
containment just outside the R.O. Building. Chemicals stored in the Cooling Tower Chemical Storage
Area are equipped with full volume secondary containment.
The risk of ash or ash residue entering the storm system is low due to the use of curbs and good
housekeeping practices including routine street sweeping/vacuum cleaning. 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.

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 trucks on paved or gravel roads, the truck dumpers,
conveyors, and radial stacker. The risk of these materials contaminating stormwater is low
because stormwater from the access road flows through a sand filter to remove TSS from the
water before it is discharged off -site. State Stormwater Management Permit No. SWS 090511
includes operating and maintenance procedures for the sand filter. That permit was issued on
7-19-2013. In addition, any stormwater from bermed TDF and wood storage areas is diverted to
the waste treatment basins. Trucks are covered, Carped, or enclosed when not being loaded or
unloaded, and paved roads are swept periodically. Spilled materials are promptly cleaned up.

Table A. Inventory of Materials Exposed to Precipitation
Materials Management
Practice and Control
Stormwater
Location
Exposed Material (Amount)
Measures (BMPs)
Treatment
Al and DA7 - Ash Silos
Fly ash (indeterminate)
Good housekeeping BMPs, wet
None
and ash
slurry loading systems
loading stations
Al and DA7 - Limestone
Limestone
Sealed storage, Blowers & Piping,
None
Storage & Blowers
remove limestone from equipment
prior to maintenance
DAl and DA7 -
Coal, Wood, TDF
Good housekeeping BMPs
None
Conveyors and Conveyor
(de minim is)
Tower
Al and DA7 —Paved
Wood; TDF; trash
Trucks covered, tarped, or
None
Roads
(indeterminate)
enclosed when not being loaded or
unloaded; roads swept
A2 - Transformer
Transformer oil (2 at 9,750-gal
Gravity discharge to Oil Trap Pit;
None
Yards
and 2 at 1,090-gal capacity)
oil is removed; accumulated
stormwater is pumped to
Wastewater Basin
A2 - Coal Storage
Coal (>1,000 tons)
Discharge to Wastewater Basin
None
A2 — Storage and
Wood chips (indeterminate)
Discharge to Wastewater Basin
None
conveying of wood
A2 — TDF Fuel Storage
Tire Chips ( 500+ tons)
Discharge to Wastewater Basin
None
Pad
A3 - Cooling Towers
None
None
Runoff from this area of
the cooling towers is
treated in sand filter
A3 - Cooling Tower
Proprietary chemicals (1,000-
Containment
Sand filter
Chemical Storage Areas
gal)
A3 — Paved and gravel
Wood chips; TDF;
Hydraulic Oil Tank - Partial roof
Sand filter, Hyd. Oil
roads, Truck Dumper 1,
Hydraulic Oil Tank (700-gal
and conforming secondary
Tank containment is
wood unloading conveyors
capacity)
containment; paved roads swept
drained to Oil Trap Pit
DA3 - Truck Dumper 2
Wood chips; TDF;
Hydraulic Oil Tank and Diesel
None
Hydraulic Oil Tank (320-gal
fuel tank - Conforming secondary
capacity); Diesel fuel tank
containment
(300-gallon capacity)
A3 - Rail Car Unloading
Coal (indeterminate); Diesel
Coal unloading - covered with
None
Area
fuel tank (1,000-gallon
roof Fuel tank and hydraulic fluid
capacity); hydraulic fluid
reservoir - equipped with
reservoir (30 gallon capacity)
conforming secondary
containment
A3 — near Coal
Coal (de minimis)
Good housekeeping BMPs for
None
Conveyor and Railroad Spur
area beneath conveyor and around
railroad spur

Table A. Inventory of Materials Exposed to Precipitation
Materials Management
Practice and Control
Stormwater
Location
Exposed Material (Amount)
Measures (BMPs)
Treatment
A3 — Switch Yard
Sulfur hexafluoride—gas
None
Sand filter
A3 - Oil Trap Pit
Typically none (12,160-gal
Oil is removed; accumulated
None
capacity)
stormwater is pumped to
Wastewater Basin
A4 - Cooling Towers
None
None
None
A5 - Condensate Storage
None
None
None
Tank
DA5 - Demineralizer
None
None
None
Building
A5 — Neutralization
None
None
None
Tank
A5 — Pump House
Diesel fuel tank (300-gallon
Conforming secondary containment
None
capacity)
A5 — Reverse Osmosis
None
None
None
Building
A5 — Water Tanks (used
None
None
None
for raw water storage)
A5 — Paved roads and
Wood; TDF; trash
Trucks covered, tarped, or
None
rash dumpsters
(indeterminate)
enclosed when not being loaded or
unloaded; roads swept
A6
New and used equipment
None
None
storage outside
A7 — Electric Fire
Transformer oil (125-gallon
Conforming secondary
None
Pump Transformer
capacity)
containment
A7 - Unloading Bay (at
None
Containment; discharge via
None
emineralizer Building)
Derain. Building sump to
Wastewater Basin
A7 — Drum Storage
Miscellaneous drums
Containment; discharge via Derain.
None
Area
(indeterminate)
Building sump to Wastewater Basin
aydown Yard Areas
Extra material — mostly metal
None
None
piping and wood

Significant Changes in Industrial Activities
On 7-19-2013, NCDENR issued State Stormwater Management Permit No. SWS 090511, which
authorized the construction of a permanent sand filter. The sand filter includes operation and
maintenance conditions which are incorporated into that permit, and the filter controls the TSS
discharged in stormwater from some pervious and impervious areas within Drainage Area 3, that
are associated with equipment that was installed to reduce emissions from the boilers at the site.
Stormwater that has been treated by the new sand filter is discharged through
Stormwater Outfall No. 3 (003).
A new stormwater outfall, Stormwater Outfall No. 6 (006) serving Drainage Area 7, was created
during a facility improvement project. This outfall is an internal outfall which discharges
stormwater into the ditch which drains through existing Stormwater Outfall No. 5 (005).