NCS000554_Buck CTCC Application_20110922

PDuke
Energy®
September 21, 2011
Mr Bradley Bennett
Division of Water Quality
Stormwater Permitting Unit
North Carolina Department of Environment
and Natural Resources
1617 Mail Service Center
Raleigh, NC 27699 -1617
Subject NPDES Stormwater Permit Application
Buck Combustion Turbine Combined Cycle Station
Dear Mr Bennett
DUKE ENERGY CORPORATION
526 South Church St
Charlotte, NC 28202
Mailing Address
PO Box 1006
Charlotte, NC 28201 -1006
r7 ��j�Ol1
SEP 2 2 2011
TLANDSANp srORMWATER KW8
Duke Energy requests a stormwater discharge permit for the Buck Combustion Turbine
Combined Cycle Station located in Rowan County, North Carolina Enclosed is a check in the
amount of $860 00 for the permitting fee, and three sets of the following documents related to
this permit request
a EPA Form 1,
b EPA Form 2F,
c EPA Form 2F Supplemental Information,
d Site Location Map
e Site Stormwater Plan Drawing
The Buck Combustion Turbine Combined Cycle (CTCC) Station is a new facility currently under
construction, and scheduled for commercial operation in December 2011 The station is located
on Duke Energy owned property that also contains the existing Buck Steam Station The new
CTCC facility has only one stormwater outfall, and is hydraulically independent of the existing
steam station
Please contact me at Mark McGary@duke- energy com or at 704 - 634 -7098 if you have any
questions or need any additional information
Sincerely,
Mark McGary, P E
Environmental, Health & Safety
attachments
www duke - energy com

Cc watt David Brooks
Cc w/o att Mr Robert Krebbs, NCDENR MRO
Dayna Herrick
John Velte
File Number 8 -6
Record Number 248464

s
- - e o
Oft Duke Duke Energy Business Services 1000066590
400 South Tryon Street + JPMORGAN CHASE BANK, N.A.
Energy® Chazlotte NC 28285 N) C-S® ® 0 S '? Syracuse, NY 50- 937/213
rrporate Accounts Payable -
ail Code ST25B
10 South Tryon Street
iarlotte, NC 28285 Date 9/6/11
Pay Eight hundred sixty and xx / 100 Dollars $* *860.00
To The
Order Of -NCDENR - NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
STORMWATER PERMITTING UNIT
1617 MAIL SERVICE CENTER
Raleteh. NC 27699 -1617
Authorized Signature

NC-S©o©SS4
�rORM
U Sy,ENVIRONMENTAL PROTECTION AGENCY,
I: EPA I.D. NUMBER
GENERAL INFORMATION
S
TrA D
EPA
`Conso mits Program -
"s "before
NCO04774 D
F
GENERAL
sl
tion starting.)
1
;2, ,3 �a 15'
LABEL-ITEMS Lc=
GENERAL INSTRUCTIONS
If a preprinted label has been provided, affix it in the,'
" EPA I.D. °NUMBER
designated space ;Review the information carefully,
- -
S
if any of i is incorrect, cross through it and enter the
"`
TERQUAII�Y
correct data in the appropriate fill -in area below
II. o FACILITY NAME
i)ENR,0
Also; if any of the preprinted data is'absent (the t
S
PLEA §1ACE LABEL IN THIS SPACE
area to the left of the label space lists the-,
informatio` n that should appear ), please provide itin
III. FACILITY MAILING,
the proper fill -in area(s) below If the label is '
ADDRESS
t ' 1Ct`S J
complete and correct you need not complete Items
I,,III, V, and VI(except VI -B which must be
completed regardless) Complete all items if no
IV. FACILITY' LOCATION
label has been proved'. Refer to the instructions for
`
detailed item descnptions and for the legal"
autho'nzation under which this'data is collected
II: POLLUTANT CHARACTERISTICS
- INSTRUCTIONS Complete'A through J to determine whether you need to submit any °per`mit application forms to °the`EPA ;If
you answer "yes' to any questions, you must submit
this form'and the supplemental'from listed,m the parenthesis
following the question Mark "X ",in'the box in the third column if the
supplemental form is attached If you answer "no" to
each question, you need not submit any of these forms You may answer "no" if your activity is excluded from permit requirements,
see Section C of the instructions See also, Section D
of the instructions for definitions ofbold -faced terms - , °
" ° °
° -
�
MARK" ° °, .
_ '.MARK "X"
SPECIFIC QUESTIONS °
° r
SPECIFIC QUESTIONS
YES`
NO
FORM'
YES °
NO
FORM
-
ATTACHED
ATTACHED
A Is this facility a, publicly, owned .treatment ,
works which results in,a discharge to'waters 'of
❑
®
❑
B Does or will this, facility,ti (either existing or
%proposed) , include „a concentrated animal
❑
®
❑
the U S ? (FORM 2A) =
feeding 2 , operation ° or aquatic' ° animal,
=production facility which results in a discharge
to waters of the U S ? (FORM 26),
16
17
18-
19
20
21,
C Is this facility which'> currently` results - in
®
❑
El
°D "is this,' Oroposal -' °facility (other than •those `
❑
®
El
discharges to waters of the U S , other than
° described-in A orb above) which will'result in a
22
23'
24
25
26
27
those described in A or B above? (FORM 2C)
discharge to waters of the US? (FORM 2D) °
E Does or will this facility treat, store, or dispose of,,
F,,, Do you or.will yoli inject at this•facility, industrial or .
hazardous wastes? (FORM 3)
❑
®
❑
- municipal effluent; below, the lowermost',straturn
El
1:1
-,containing, within o6e quarter mile of the well bore,
° underground sources_of dnrikmg water? (FORM 4) _,
28
°29
30
31
32
33
G Do you-or will you Inject at this facihty'any produced
water,other fluids,which,Ere brought to, the surface
H • Do you 'or , will you inject at this facility fluids for'
_,-special proces`ses'such,as mining of'sulfer•by the,
in connection with convdnUonal `oil or natural gas'
❑
®
❑
rasch `process, solution mining of minerals, in
_— Fsitu
❑
®
❑
production, inject fluids used for enhanced recovery
combustion of--fossil -fuel, or recovery of
of oil or naturallgas, or inject fluids 'for storage of
-,geothermal energy? (FORM 4).
liquid hydrocarbons? (FORM 4)
° - 1, 1,
-34-
-35
36 =zy°
37
38
39
I Is this 'facility a'proposed stationary source °
J Is this ,facility ,a proposed - stationary source p:
which is one of the 28 iridustnal categories listed
*and
El
®
❑
which is NOT one of the 28 industrial categories ❑ ®
El
the. instructions which will potentially emit
listed in the instructions and which will potentially
100 tons per year of any air pollutant regulated
emit 250 tons per -year of any air,•pollutant
under the Clean Air Act, and, may'affect or be °
located m'an "attainment area? FORM 5 ' 40,-
regulated under the .Clean Air Act and' may affect-,
_ or be located in an attamment`are? FORM 5):, 43 ” 44
- 41 ,"
42
45 `
III. NAME OF, FACILITY
1 SKIP Buck Combustion Turbine Combined
Cycle Station
15 1 16 -29 1 30 ° '
- 69 °
IV. FACILITY'CONTACT-
'& title), TITLE
A NAME last, first, '&
B PHONE area code & no
McGary, Mark / Sr Engineer
980 373 7898 -
`48-, 49 51' 1 ° 52 ° 55
2
15 16'_
45 1,46
V. FACILITY MAILING ADDRESS -
A STREET OR P O BOX _ r°
D ZIP CODE z °
28201 `
P O Box 1006, Mall Code EC13K
s
15
1 16
45
B- CITY,OR.TOWN
C STATE
C-1 Charlotte
NC
4
15 16
40 °41x _42
47 51:
VI. FACILITY_ LOCATION °_rs
A'STREET °ROUTE,NO OR OTHER SPECIFIC- IDENTIFIER
a ,
°
1385 Dukevllle Rd,
5_
15
16` "
- - 45
`B, COUNTY NAME
Rowan
46
70
r'
C CITY TOWN,
D STATE
E ZIP
F COUNTY CODE
,OR
CODE
Salisbury
NC
28146
6
15
16
40`
41 42
47 , 51
52 54-
EPA FORM 3510 -1 (8 -90) CONTINUED ON REVERSE

r
CONTINLIED FROM THE FRONT
VII -SIC CODES °(4 - digit,' In order o_ f priority),
„ _ A -FIRST B SECOND `
4911
(specify)
Electric Services
°7
5
(specify)
5°
16 17
C THIRD .D FOURTH
c (specify) 7 (specify)
7 7
15 1 °16 17 15 1 16 `19
.VIII,. OPERATOR INFORMATION ", `
A- NAME B Is the name listed in Item
Duke Energy Carolinas, LLC (Attention Mark McGary) VIII- A,aIso the owner?
'® YES El N6'
$
18
- ° - -
19 55
C STATUS -OF OPERATOR. Ente? the appropnate letterinto the answer box, if'(Other, " specify)
D PHONE afea code & no
'F = FEDERAL °I M = PUBLIC (other than federal or state)
P
(specify)
980
373
7898
A `
S =STATE O =OTHER (specify)
Electric Utility
56 °
16 18
19 21
1 22 25
P = PRIVATE
15
1
E- STREET.OR PO BOXY b °
a
a
P O Box 1006, Mall Code EC13K
26 ° - ° , s - 55-11
F CITY OR TOWN e °
G STATE H ZIP CODE IX. INDIAN =LAND
Charlott e
NC 28201 Is the facility located on Indian lands? -
42 42 ° 47> °-51 0 "YES ' � , ® NO s
B
15 16 - 40,
X. EXISTING ENVIRONMENTAL PERMITS
-'D PSD'(AirEmrssion§ from, Pioposed Sources ) -
9 _ ; P "e TV037886T27
15° 1. 16 1 17 f . 18 ° >' 30
Y A NPDES Discharges to Surface Water)— - t
J
NCO04774
9 •
°N
15 °
16
1 17
.18 ` "" " 30
° B• UIC' Under round Injection of Fluids
E` OTHER (specify)
(Specify)
:C
T°
1
c
T
s.
9 1
U
91
,
15 1
16-1
17
18 -30'
15,1116
1 17
1 18 - 30
C RCRA Hazardous Wastes d E OTHER (specify) (Specify)
9 T 1, NCD043678929 9 T 8°
15 16 17' 18 - 30 , 15 1 16 1 17 18 —30
XI. °MAP
Attach tb'this application a topographic map of the area extending to at least one mile -beyond property bouridanes 'The map must"
show the outline of-'the- facility, the,-location- of each of its' existing and proposed Intake and - discharge structures, each of Its
hazardous waste treatment, storage,a`or disposal facilities,' andeach well where It injects°flulds, "underground' "Include all,spnngs,, --
rivers- and other suiface,water bodies In the inal5 area See Instruetlons,for precise requirements
XII. °NATURE OF BUSINESS (provide a- tir�efdescription)
Combustion turbine combined cycle electric generation
XIII. CERTIFICATION, (see:Iristructions )` '
1 certify under penalty of law that I have personallyezamn ed arid am famdhar with the #7f6Mnahori,subrnftted m'thls applicabon and`- ,-
all.attachments and that, based on'rny Inquiry of those persons, immediately responsble'for,obtalning the info" nation' contained, in
the. appl►cation, 1 believe that the Information is true, accurate and complete 1 am aware -that there areo significant. penalties for
submitting false `rnformaho`n, including the ossibih of fine nsonment "
A NAME & OFFICIAL TITLE (type or pant) B N TU
C DATE SIGNED
StevwrA Townsend, Sr General Manager III
- p
COMMENTS FOR OFFICIAL USE ONLY '
C = o
C a
15
16 55
EPA FORM 3510 -1 (8 -90)

EPA ID Number (copy from Item 1 of Form 1) Form Approved OMB No 2040 -0086
Please Drint or tvoe in the unshaded areas only NCO04774 Approval expires 5 -31 -92
FORM
NPDES
U S Environmental Protection Agency
;� EPA Washington, DC 20460
Application for Permit rmit to Discharge Storm Water
Discharges Associated with Industrial Activity
Paperwork Reduction Act Notice
Public reporting burden for this application is estimated to average 28 6 hours per application, including time for reviewing instructions, searching existing data sources,
gathering and maintaining the data needed, and completing and reviewing the collection of information Send comments regarding the burden estimate, any other aspect
of this collection of information, or suggestions for improving this form, including suggestions which may increase or reduce this burden to Chief, Information Policy
Branch, PM -223, U S Environmental Protection Agency, 1200 Pennsylvania Avenue, NW, Washington, DC 20460, or Director, Office of Information and Regulatory
Affairs, Office of Management and Budget, Washington, DC 20503
I. Outfall Localion
For each outfall, list the latitude and longitude of its location to the nearest 15 seconds and the name of the receiving water
A Outfall Number
(list)
B Latitude
C Longitude
D Receiving Water
(name)
SW001
35 00
42 00
30 00
80 001
22 00
40 00
Unnamed cove of the Yadkin River
11. Improvements
A Are you now required by any Federal, State, or local authority to meet any implementation schedule for the construction, upgrading or operation of wastewater
treatment equipment or practices or any other environmental programs which may affect the discharges described in this application> This includes, but is not limited
to, permit conditions, administrative or enforcement orders, enforcement compliance schedule letters, stipulations, court orders, and grant or loan conditions
1 Identification of Conditions,
Agreements, Etc
2 Affected Outfalls
3 Brief Description of Project
4 Final
Compliance Date
number
source of discharge
a req
L b prof
N/A
B You may attach additional sheets describing any additional water pollution (or other environmental projects which may affect your discharges) you now have under
way or which you plan Indicate whether each program is now under way or planned, and indicate your actual or planned schedules for construction
III. Site Drainage Map
Attach a site map showing topography (or indicating the outline of drainage areas served by the outfalls(s) covered in the application if a topographic map is unavailable)
depicting the facility including each of its intake and discharge structures, the drainage area of each storm water outfall, paved areas and buildings within the drainage
area of each storm water outfall, each known past or present areas used for outdoor storage of disposal of significant materials, each existing structural control measure
to reduce pollutants in storm water runoff, materials loading and access areas, areas where pesticides, herbicides, soil conditioners and fertilizers are applied, each of
its hazardous waste treatment, storage or disposal units (including each area not required to have a RCRA permit which is used for accumulating hazardous waste
under 40 CFR 262 34), each well where Fluids from the facility are injected underground, springs, and other surface water bodies which received storm water discharges
from the facility
EPA Form 3510 -2F (1 -92) Page 1 of 3 Continue on Page 2
o�c��adc� n
SEP 2 2 2011
DENR • WATER QUALITY
WETL 4Ni . , . '; i =P BRANCH

Continued from the Front
IV Narrative Description of Pollutant Sources
A For each outfall provide an estimate of the area (include units) of imperious surfaces (including paved areas and building roofs) drained to the outfall and an estimate of the total surface area
drained by the outfall
Outfall
Area of Impervious Surface
Total Area Drained
Outfall
Area of Impervious Surface
Total Area Drained
Number
(provide units)
(provide units)
Number
(provide units)
(provide units)
SW001
Approx 12 acres
Approx 14 acres
industrial use
B Provide a narrative description of significant materials that are currently or in the past three years have been treated, stored or disposed in a manner to allow exposure
to storm water, method of treatment, storage, or disposal, past and present materials management practices employed to minimize contact by these materials with
storm water runoff, materials loading and access areas, and the location, manner, and frequency in which pesticides, herbicides, soil conditioners, and fertilizers are
applied
The facility is a 2xl new natural gas fired combustion turbine combined cycle power plant operated .independently of the Buck
Steam Station The S_.._ ._11 ucil.ze ater ___ar-ent cne;icals S-_, as fe_r__ sulfa_e, -ca_um hr diD —de, scd.,.-n ^. }NCczl_cr_t =_,
s_Lzactants, oci_er _ ea_ -ert .erricais a,a rc�y��ers In addition, cyt -ic acid 1%tricatinc _.-_ and rious Ma�.ntenance
a
,_ __als shay- be utilized at the site All bulk chemical storage is located irs:3e of containment and fader cc.e. The site
is primarily covered with 2" x 2" washed gravel over a compacted clay base with asphalt paved roads throughout the facility All
building roofs drain to the stormwater outfall Bulk chemical unloading facilities have containment for the delivery vehicles
ed _n this pond _ tYe nt of a cnenical
r ater detentior rend Storm,at.e_ car be _eta_, x �
All s__ ra,-aae is routed to t,e Ve
cr - lease The site shall utilize nest management practices and a stormwater pollution prevention plan to reduce
pollutants in the storm water Herbicides will be applied approximately 3 -4 times per year on the gravel surfaces for weed
control applied in accordance with manufacturer requirements The facility will maintain a SPCC Plan in accordance with 40 CFR
Part 112 Refer to the accompanying supplemental information
C For each outfall, provide the location and a description of existing structural and nonstructural control measures to reduce pollutants in storm water runoff, and a
description of the treatment the storm water receives, Including the schedule and type of maintenance for control and treatment measures and the ultimate disposal
of any solid or fluid wastes other than by discharge
Outfall
List Codes from
Number
Treatment
Table 2F -1
SW0ol All chemical and oil handling and storage areas are provided with some means of secondary
containment Most chemical storage areas are located within covered concrete containments All
open containments are inspected prior to discharge of any stormwater All stormwater runoff is
routed to the detention pond prior to discharge via SWO01 There is no treatment associated with
the stormwater effluent Any chemical or petroleum release occurring into the drainage system at
the station can be quickly contained within the pond by covering or blocking the small diameter
dewatering orifice in the riser Refer to the accompanying supplemental information
V. Nonstormwater Discharges
A I certify under penalty of law hat the outfall(s) covered by this application have been tested or evaluated for the presence of nonstormwater discharges, and that all
nonstormwater discharged from these outfall(s) are identified in either an accompanying Form 2C or From 2E application for the outfall
Name and Official Title (type or print)
Signature
Date Signed
N/A
B Provide a description of the method used, the date of any testing, and the onsite drainage points that were directly observed during a test
NA Facility is under construction
VI. Significant Leaks or Spills
Provide existing information regarding the history of significant leaks or spills of toxic or hazardous pollutants at the facility in the last three years, including the
approximate date and location of the spill or leak, and the type and amount of material released
A Facility is under construction
EPA Form 3510 -21F (1 -92) Page 2 of 3 Continue on Page 3

EPA ID Number (copy from Item 1 of Form 1)
Continued from Paae 2 NC004774
EPA yorm 3510 -2F (1 -92) Page 3 of 3
VII Discharge Information
A, B, C, & D See instructions before proceeding Complete one set of tables for each outfall Annotate the outfall number in the space provided
Table VII -A, VII -B, VII -C are included on separate sheets numbers VII -1 and VII -2
E Potential discharges not covered by analysis — is any toxic pollutant listed in table 2F -2, 2F -3, or 2F -4, a substance or a component of a substance which you
currently use or manufacture as an intermediate or final product or byproduct?
❑ Yes (list all such pollutants below) Q No (go to Section 1X)
VIII Biological Toxicity Testing Data
Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made on any of your discharges or on a receiving water in
relation to your discharge within the last 3 years?
❑ Yes (list all such pollutants below) ❑✓ No (go to Section IX)
IX. Contract Analysts Information
Were any of the analyses reported in Item VII performed by a contract laboratory or consulting firm?
❑ Yes (list the name, address, and telephone number of, and pollutants
analyzed by, each such laboratory or firm below)
© No (go to Section X)
A Name
B Address
C Area Code & Phone No
D Pollutants Analyzed
X Certification
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision m accordance with a system designed to assure
that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system or those persons
directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete I am aware that
there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations
A N me & Official Title (Type Or Print)
-A A Townsend, Sr General Manager III
B Area Code and Phone No
C Ue _
D Date Signed
r ` ^ Q1 "t1
l
EPA yorm 3510 -2F (1 -92) Page 3 of 3

I EPA ID Number (copy from Item 1 of Form 1) Form Approved OMB No 2040 -0086
N0004774 I Approval expires 5 -31 -92
VII. Discharge information (Continued from page 3 of Form 2F)
Part A — You must provide the results of at least one analysis for every pollutant in this table Complete one table for each outfall See instructions for additional details
Pollutant
and
CAS Number
(d available)
Maximum Values
(Include units)
Average Values
(include units)
Number
of
Storm
Events
Sampled
Sources of Pollutants
Grab Sample
Taken During
First 20
Minutes
Flow- Weighted
Composite
Grab Sample
Taken During
First 20
Minutes
Flow- Weighted
Composite
Oil and Grease
N/A
NA Facility is under construction
Biological Oxygen
Demand (BOD5)
Chemical Oxygen
Demand (COD)
Total Suspended
Solids (TSS)
Total Nitrogen
Total Phosphorus
pH
Minimum
Maximum
Minimum
Maximum
Part B — List each pollutant that is limited in an effluent guideline which the facility is subject to or any pollutant listed in the facility's NPDES permit for its process
wastewater (if the facility is operating under an existing NPDES permit) Complete one table for each outfall See the instructions for additional details and
requirements
Pollutant
and
CAS Number
(if available)
Maximum Values
(include units)
Average Values
(include units)
Number
of
Storm
Events
Sampled
Sources of Pollutants
Grab Sample
Taken During
First 20
Minutes
Flow- Weighted
Composite
Grab Sample
Taken During
First 20
Minutes
Flow- Weighted
Composite
NA Facility is under construction
EPA Form 3510 -2F (1 -92) Page VII -1 Continue on Reverse

('nnhniierl frnm tha Frnnt
Part C - List each pollutant shown in Table 2F -2, 2F -3, and 2F -4 that you know or have reason to believe is present See the instructions for additional details and
requirements Complete one table for each outfall
Pollutant
and
CAS Number
(if available)
Maximum Values
(include units)
Average Values
(include units)
Number
of
Storm
Events
Sampled
Sources of Pollutants
Grab Sample
Taken During
First 20
Minutes
Flow- Weighted
Composite
Grab Sample
Taken During
First 20
Minutes
Flow- Weighted
Composite
NA Facility is under construction
Part D — Provide data for the storm event(s) which resulted in the maximum values for the flow weighted composite sample
1
Date of
Storm
Event
2
Duration
of Storm Event
(in minutes)
3
Total rainfall
during storm event
(in inches)
4
Number of hours between
beginning of storm measured
and end of previous
measurable rain event
5
Maximum flow rate during
rain event
(gallons/minute or
specify units)
6
Total flow from
rain event
(gallons or specify units)
N/A
7 Provide a description of the method of flow measurement or estimate
N/A Facility is under construction
EPA Form 3510 -2F (1 -92) Page VII -2

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BUCK
COMBUSTION TURBINE
COMBINED CYCLE STATION
Stormwater Discharge Permit Application
Form 2F Supplemental Information

GENERAL SITE INFORMATION
The Buck Combustion Turbine Combined Cycle (CTCC) is a new natural gas- fired, 620
megawatt electric generation station located in Rowan County approximately three miles
east of Spencer, North Carolina. The facility contains two primary combustion turbine
units, and one secondary heat recovery steam generator unit.
The facility is located on a 643 acre property that also contains the Buck Steam Station.
The property borders the southern shore of the Yadkin River in the upper reaches of
High Rock Lake. The station is accessed from Dukeville Road off of Long Ferry Road.
The Buck CTCC facility is scheduled for completion and commercial operation in
December 2011.
The Buck CTCC is located approximately 2,000 feet south and upgradient from the Buck
Steam Station. The CTCC is hydraulically separate and independent of the Buck Steam
Station from a stormwater runoff standpoint. No stormwater runoff from the CTCC co-
mingles with any stormwater discharges associated with the Buck Steam Station. The
CTCC contains only a single stormwater outfall that discharges into a cove of the Yadkin
River located west of the facility. The industrial use area associated with the CTCC
facility covers approximately 14 acres.
A Stormwater Pollution Prevention Plan (SWPPP) for the Buck CTCC will be developed
and implemented prior to commercial operation. In addition, the facility will maintain an
up -to -date Spill Prevention Control and Countermeasure (SPCC) Plan in place in
accordance with the USEPA Oil Pollution Prevention Regulation 40 CFR Part 112
NPDES PERMITTED DISCHARGES SUMMARY
Upon completion, the Buck CTCC facility will have one NPDES wastewater outfall that
will discharge into the Buck Steam Station ash settling basin This discharge will include
the following waste streams,
a. equipment drains
b interior floor drains
c transformer secondary containment drains
d. sanitary sewer effluent
e cooling tower blowdown
f. boiler blowdown
g. chiller drains
h. oil water separator discharge
All wastewater discharges from the CTCC are routed into a consolidated wastewater
sump located at the CTCC. This sump subsequently pumps to the Buck Steam Station
ash settling basin.
STORMWATER OUTFALL AND DRAINAGE AREA DESCRIPTION
The Buck CTCC facility has one stormwater outfall that discharges to surface waters.
This outfall is designated as SWO01 and is located immediately west of the facility. This
1

outfall is also the outlet of a stormwater detention pond installed as part of the erosion
and sedimentation control plan for construction of the facility This detention pond will
remain a permanent stormwater control feature at the site The outfall discharges into a
nprap channel that directs the stormwater to an existing culvert beneath the station
access road. This culvert discharges into a wooded area on the west side of the road
and eventually into a cove of the Yadkin River located west of the CTCC.
The outfall location and the contributing industrial -use drainage area delineation is
shown on the accompanying site plan drawing. A description of the contributing
drainage area for the outfall is provided below. Included with the description is the
approximate location coordinates of the outfall, the approximate amount of impervious
surface area within the drainage area, a description of the significant materials and
activities located within the drainage area, the type of discharge conveyance, and a
description of the discharge control measures
Outfall SW001
Discharge Structure 48 inch diameter CMP
Coordinates 350 42'30" N 800 22'40" W
Industrial Use Drainage Area 14 acres
Approximate Impervious Area. 80%
Accessibility Accessible
Area Description
The industrial use area surrounding the CTCC facility covers approximately 14 acres
This area is comprised primarily of building roofs with asphalt pavement or gravel
surfaced areas surrounding the buildings. Included within this drainage area are some
minor vegetated areas located east of the cooling tower and in the vicinity of the water
treatment facility
The drainage area includes two Gas Turbine Buildings, two Heat Recovery Steam
Generator (HRSG) buildings, one Steam Turbine Building, one Water Treatment
Building, one Auxiliary Boiler Building, one Cooling Tower structure, two chiller buildings,
one administration /control /warehouse building, a raw water treatment facility, several
large transformers, a power distribution center, an emergency diesel generator, two
large water tanks, one large ammonia tank, an oil water separator, and the station
consolidated wastewater sump
All roof drains and all stormwater runoff from external paved areas enters catch basins
that discharge via subsurface piping into the stormwater detention pond located
immediately west of the CTCC All internal building floor drains discharge either directly
into the station consolidated wastewater sump, or into the oil water separator that
subsequently discharges into the sump. All transformer containments discharge into the
oil water separator. All other open containments, including tanker unloading stations,
discharge directly into the consolidated wastewater sump. Most covered containments
at the station are non - discharge containments
Significant Materials /Activities
Lube Oil: Both Gas Turbine Buildings contain one 4,500 gallon lube oil tank. The
tanks are located within concrete containments.
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The Steam Turbine Building contains one lube oil tank within concrete
containment with an open drain to the oil water separator
Diesel Fuel. The emergency diesel generator enclosure contains 550 gallons of diesel
fuel located within a double - walled container integral with the generator.
Mineral Oil Various quantities of mineral oil is stored inside the two gas turbine main
step -up transformers, the two gas turbine auxiliary transformers, the
steam turbine main step -up transformer, and the five excitation
transformers. All these transformers are located within concrete
containments with open drains to the oil water separator.
Ammonia* One 20,000 gallon ammonia tanks is located on the western side of the
facility The tank is located within an open concrete containment with a
valved drain to the consolidated wastewater sump A sloped and curbed
concrete unloading pad is located adjacent to tank, and also has a valved
drain to the consolidated wastewater sump.
One 300 gallon ammonia tank is located inside the Steam Turbine
Building The tank is within a concrete containment basin with an open
drain to the oil water separator Floor drains in the building also
discharge into the oil water separator.
Other Chemicals. Various chemical are used and stored at the facility as follows:
The Raw Water Treatment Facility contains one sodium hypochlorite
tank, one ferric sulfate tank, and one caustic tank. The tanks are located
under a common shed within dead end covered concrete containment
basins. A sloped and curbed concrete chemical unloading pad is located
adjacent to the shed, and has an open drain to the consolidated
wastewater sump
The Cooling Tower has an adjacent chemical feed skid that contains one
sodium hypochrorite tank, one dispersant tank, one micro biocide tote,
and one water treatment tote. The four containers are located under a
common shed within dead end covered concrete containment basins. A
sloped and curbed concrete chemical unloading pad is located adjacent
to the shed, and has an open drain to the consolidated wastewater sump.
The Water Treatment Building is a fully enclosed structure that contains
one sodium hypochlonte tank, one sodium bisulfate tank, one sodium
hydroxide tank, one RO citric acid tote and one RO anti - scalant tote All
containers are located within dead end concrete containments. The
building floor drains discharge into the consolidated wastewater sump.
The Auxiliary Boiler Building is a fully enclosed structure that contains one
19% ammonia tote and one eliminox tote. The containers are located
within dead end concrete containments.
The gas filter skid contains one condensate tank located within an open
metal containment bin with an open drain to the consolidated wastewater
sump.
One phosphate skid is located on the east side of each of the HRSG
buildings The containers are located within concrete containments with
open drains to the consolidated wastewater sump.
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One small gas condensate tote is located adjacent to the west side of
each HRSG Building. These totes are not located within containments
Discharge Controls
All stormwater runoff from the CTCC station eventually discharges into a stormwater
detention pond located immediately west of the facility. The pond outlet works are
comprised of a 60 inch CMP riser and 48 inch CMP barrel. The pond is dewatered by a
small diameter dewatering orifice at the bottom of the 60 inch riser. In the event of any
chemical or petroleum release into the stormwater drainage system at the facility, this
small orifice can be quickly covered or blocked to contain the release within the
detention pond.
The discharge end of the 48 inch CMP is designated SW001. Stormwater discharging
from SW001 enters a riprap channel that routes the flow into an existing 24 inch CMP
beneath the station access road The discharge eventually enters a backwater cove of
the Yadkin River west of the CTCC.
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