NCS000578_Buck Steam Station SW Permit Application Complete_20140926

ENERGY,
September 26, 2014
Mr. Bradley Bennett
State of North Carolina
Department of Environment and Natural Resources
Division of Energy, Mineral & Land Resources
Stormwater Permitting Program
1612 Mail Service Center
Raleigh, NC 27699-1612
Subject; NPDES Stormwater Permit Application
Buck Steam Station
Dear Mr. Bennett,.
Environmental Services
Duke Energy
526 South Church Street
Charlotte, NC 28202
Mailing Address:
Mail Code EC13K/ P.O. Box 1006
Charlotte, NC 28201-1006
Duke Energy requests a stormwater discharge permit for the Buck Steam Station located in
Rowan County, North Carolina. Enclosed is a check from Duke Energy in the amount of
$860.00 for the subject stormwater 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
Numerous stormwater outfalls are located at the Buck Steam Station. No stormwater data is
currently available, however, all accessible outfalls at the station will be sampled in due course
as qualifying rainfall events occur at the site. As described in the accompanying supplemental
information, Duke Energy does not intend to collect samples from outfalls conveying stormwater
runoff from non -industrial use areas of the site, nor from the numerous Powerhouse roof drains.
The Buck Steam Station is out of service and currently undergoing decommissioning.
Should you have any questions regarding this submittal or require additional information, please
contact Mark McGary at 980-373-7898 or email [e-mail].

I certify, under penalty of law, that this document and all attachments were prepared under my direction
or supervision in accordance with a system designed to assure that qualified personnel properly gather
and evaluate the information submitted. Based on my inquiry of the person or persons who manage the
system, or those persons directly responsible for gathering the information, the information submitted is,
to the best of my knowledge and belief, true, accurate, and complete. 1 am aware that there are
significant penalties for submitting false information, including the possibility of fines and imprisonment
for knowing violations.
zy�w
J
Henry A. Botkins, Jr. - General Manager II
Buck Steam Station
Attachments

bc: Dale Wooten — Buck Steam Station
Henry A. Botkins, Jr. — Buck Combined Cycle Station
Penny Stafford
Mark McGary
Steve Cahoon
Harry Sideris
Linda Hickok
Mike Shrader
Document Number: 8-6
Record Type Code: ENV -50-02
UPS:

Check Date: Au,: 29 2014
Vendor Number: 0000071949
Name! STATE OF NORTH CAROLINA DLPARTMENT OF
Check Number:
10001'21A
Invoice Number
Invoice Date
Voucher ID Gross Amount
Discounts Taken
late Charge
Paid Amount
08251486000NO
BUCK
Aug 35 2014
10668014 860.00
0.00
000
:.60.00
Check Number:
Date
Total
Gross Amount
Total
Discounts
Total
Late Charges
Total
Paid Amount
1000122,81
AuW29 2014
$860.00
$0.00
$0.00
$860.00
f ARE ON BACK. HOLD AT AN ANGL–E—TO-91PW—,VO1D IF ABSENT.
Duke Energy Business Services 1000122581
•� DUKE 400 South Tryon Street JPMORGAN CHASE BANK, N.A.
ENERGY. Charlotte. NC 28285 Syracuse, NY 50-937r2 13
Corporate Accounts Payable
ST25B 1 400 South Tryon Street
Charlotte, NC 28285 Date 8/29/14
Pay Eight hundred sixty and xx I l00 Dollars
To The
Order Or STATE OF NORTH CAROLINA DEPARTMENT OF
ENVIROMENT AND NATURAL RESOURCES
DIV OF ENERGY MINERAL AND
LAND RESOURCES
1612 MAIL SERVICE CENTER
Raleigh, NC 27699-1612

7*8�6000
-Ole& ff%:�
Authorized Signature

FORM
U.S. ENVIRONMENTAL PROTECTION AGENCY
1. EPA I.D. NUMBER
1
^�
GENERAL INFORMATION
S T/A C
N00004774
�EPA
Consolidated Permits Program
F D
GENERAL
(Read the "General Instructions" before starting.)
1 2 13 14 15
LABEL ITEMS
GENERAL INSTRUCTIONS
If a preprinted label has been provided, affix it to the
I. EPA I.D. NUMBER
designated space. Review the Information carefully,
If any of it is Incorrect cross through it and enter the
oomact data in the hfill-in area below.
II. FACILITY NAME
meriato
AM, if an of the preprinted data is absent (the
area to the left of the label space lists the
III. FACILITY MAILING PLEASE PLACE LABEL IN THIS SPACE Information that should appsai), please provide it in
thearea(s)fthe label is
emplettee
ADDRESS
you needw.
and not completa Items
I, III, V, and VI(exoapt VI-B which must be
IV. FACILITY LOCATION
completed regardless). Complete all items 9 no
label has been proved. Refer to the instructions for
detailed item descriptions and for the legal
authorization under which this data js collected.
II. POLLUTANT CHARACTERISTICS
INSTRUCTIONS: Complete A through J to determine whether you need to submit any permit application fors to the EPA. If you answeryea' to any questions, you must submit
this formand the supplemental from listed in the parenthesis following the question. Mark W in the box in the third column 0 the supplemental for is attached. If you answer 'no* to
each question, you need not submit any of these fors. You may answer 'no' 0 your activity Is excluded from permit requirements; see Section C of the instructions. See also, Section D
of the Instructions for definitions of bold-faced terms.
ivO "XFORM
MARK'XFO
SPECIFIC QUESTIONS
SPECIFIC QUESTIONS
RM
VES
N
NO
ATTACHED
YES
NO
ATTACHED
A. Is this facility a publicly owned treatment
B. Does or will this facility (either existing or
works which results in a discharge to waters of❑
®
1:1
proposed) include a concentrated animal
1:1
®
❑
the U.S.? (FORM 2A)
feeding operation or aquatic animal
production facility which results in a discharge
to waters of the U.S.? (FORM 2B)
16
17
18
1e
20
21
C. Is this facility which currently results in®
❑
❑
D. Is this proposal facility (other than those
11
®
1:1discharges
to waters of the U.S. other than
described in A or B above) which will result in a
those described in A or B above? (FORM 2C)
22
23
24
discharge to waters of the U.S.? (FORM 2D)
--2-5—T
26
27
E. Does or will this facility treat, store, or dispose of
F. Do you or will you inject at this facility industrial or
hazardous wastes? (FORM 3)
❑
®
❑
municipal effluent below the lowermost stratum
❑
®
❑
oorrtaining, witMn one quarter mile of the well bore,
underground sources of drinking water? (FORM 4)
28
2e
30
31
32
33
G. Do you or will infect at this facility any produced
H. Do you or will you inject at this facility Quids for
water other fluids which are brought to the surface
in connection with conventional oil or natural gas
❑
®
❑
special processes such as mining of suffer by the
Frasch process, solution mining of minerals, in
❑
®
❑
production, inject fluids used for enhanced recovery
situ combustion of fossil fuel, or recovery of
of oil or natural gas, or inject fluids for storage of
liquid hydrocarbons? (FORM 4)
geothermal energy? (FORM 4)
31
35
36
37
38
39
1. Is this facility a proposed stationary source
J. Is this facility a proposed stationary source
which is one of the 28 industrial categories listed
which is NOT one of the 28 industrial categories
❑ ® ❑ ❑ ® ❑
in the instructions and which will potentially emit
listed in the instructions and which will potentially
100 tons per year of any air pollutant regulated
be
emit 250 tons per year of any air pollutant
under the Clean Air Act and may affect or
regulated under the Clean Air Act and may affect
located in an attainment area? FORM 5
40 41 42 or be located in an attainment are? FORM 5 43 44 45
111. NAME OF FACILITY
SKIP Buck Steam Station
1
15 16,2e 1 30
69
IV. FACILITY CONTACT
A. NAME & TITLE last first & fYtle B. PHONE area code & no.
H2McGary, Mark / Lead Engineer
980 373 7898
15 1 16
45 46 46 4e 52 55
V. FACILITY MAILING ADDRESS
j51
A. STREET OR P.O. BOX
s P.O. Box 1006, Mail Code EC13K
1s 1 16
45
B. CITY OR TOWN
C. STATE D. ZIP CODE
C Charlotte
NC 28201
15 1 18
40 4i 42 47 51
VI. FACILITY LOCATION
ji
A. STREET, ROUTE NO. OR OTHER SPECIFIC IDENTIFIER
D 1555 Dukeville Rd.
5
1s 1 16
as
B. COUNTY NAME
Rowan
46
70
C. CITY OR TOWN
D. STATE E. ZIP F. COUNTY CODE
CODE
Salisbury
NC 28146
6
15 1 16
40 4, 42 47 51 52 54
EPA FORM 3510-1 (8-90) CONTINUED ON REVERSE

CONTINUED FROM THE FRONT
VII. SIC CODES (4 -digit, in order of rior'
A. FIRST B. SECOND
c 4911
(specify)
7
(specify)
5
Electric Services
b
16 17
16 1S
C. THIRD D. FOURTH
(specify) � (specify)
15 16 17 15 18 18
VIII.OPERATOR INFORMATION
A. NAME B. Is the name listed in Item
c Duke Energy Carolinas, LLC (Attention: Mark McGary) VIII -A also the owner?
8 ® YES []NO
18 1 18 ss
C. STATUS OF OPERATOR Enter the apprupdate letter into the answer box if 'Other's D. PHONE area code & no.
F = FEDERAL M = PUBLIC (other than federal or state)
P
(specify)
980
373
7898
S = STATE O = OTHER (specify)
A
Electric Utility A
58
18 18
18 21
22 25
P = PRIVATE
15
E. STREET OR PO BOX
P.O. Box 1006, Mail Code EC13K
26 55
F. CITY OR TOWN G. STATE H. ZIP CODE IX. INDIAN LAND
c Charlotte NC 28201 Is the facility located on Indian lands?
B ❑ YES ® NO
15 16 40 1 1 42 42 1 1 47 51
X. EXISTING ENVIRONMENTAL PERMITS
A. NPDES (Discharges to Surface Water D. PSD Air Emissions from Proposed Sources
8
NC0004774 c
9 N' P
15 1 16 1 17 1 18 30 15 16 17 18 30
B. UIC Under round Injection of Fluids E. OTHER s t (Specify)
c r e 03786 T29 Air permit
9 1 U 9
15 1 16 117 18 30 15 116 17 18 30
C. RCRA Hazardous Wastes E. OTHER (specify) (Specify)
' NCD043678929 8 W00000452 Distr. of residual solids
s
#ij 17 1 18 30 15 1 16 1 17 1 18 30 permit/ Ind. landfill permit
XI. MAP
Attach to this application a topographic map of the area extending to at least one mile beyond property boundaries. 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, or disposal facilities, and each well where it injects fluids underground. Include all springs,
rivers and other surface water bodies in the map area. See instructions for precise requirements.
XII. NATURE OF BUSINESS(provide a brief description)
Coal-fired electric generation
XIII. CERTIFICATION see instructions
certify underpena/ty of law that I have personally examined and am familiar with the information submitted in this application and
all attachments and that, based on my inquiry of those persons immediately responsible for obtaining the information contained in
the application, 1 believe that the information is true, accurate and complete. I am aware that there are significant penalties for
submitting false information, including theossibili of fine and imprisonment.
A. NAME & OFFICIAL TITLE (type or print) B. SIGNAT C. DAT SI NED
Henry A Botkins, Jr -General Manager II , tea/
COMMENTS FOR OFFICIAL USE ONLY
C
C
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
NC0004774 I Aooroval exoires 5-31-92
nnaan prnn vi
FORME
2F
NPOES
typo uu,o u, w„a..a.+ o.aoo ..,,,�.
U.S. Environmental Protection Agency
PA Washington, DC 20460
r' Application for Permit to Discharge Storm Water
410'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.
1.Outfall Location
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 D. Receiving Water
(list) B. Latitude C. Longitude (name)
See attached See attached supplemental information
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 applieation7 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.
4 Final
1 Identification of Conditions. 2 Affected Outfalls Compliance Date
Agreements, Etc number source of discharge 3. Brief Description of Project a req b. proj
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
111. Site Drainage Map
Attach a site map showing topography (or indicating the outline of drainage areas served by the outlalls(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

Continued from the Front
IV. Narrative Description of Pollutant Sources
A For each outfall, provide an estimate of Cie area (include units) of Imperious surfaces (induding paved areas and building roofs) drained to the outfall, and an estimate of the total surface area
drained by the outrall
Outlet 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)
See attached supplemental
information
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.
See attached 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
NumberTreatment List Codes from
See attached supplemental information Table 2F-1
V. Nonstormwater Discharges
A. I certify under penalty of law hat the outfalls) covered by this application have been tested or evaluated for the presence of nonstormwater discharges, and that all
nonstormwater discharged from these outlall(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
Henry A. Botkins, GM II Reg. Stat.
B. Provide a description of the method used, the date of any testing, and the onsite drainage points that were directly observed durin2 a test.
visual assessment for non-stormwater discharges was conducted on September 22, 2014. Each accessible outfall was observed for
outflow after a period of at least 72 hours of dry weather. Outfalls SW001, SW002, SW048, SW073, SW075, and SW077 were dry at
the time of observation. Outfall SWO03 had a fast drip that appeared to originate from stormwater runoff retained within a drop
inlet located in the circle driveway.
I. SI nificant 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.
ithin the past three years there have been no significant spills or leaks of hazardous substances in excess of reportable
entities set forth by Section 311 of the Clean Water Act or Section 102 of CERCLA.
EPA Form 3510-2F (1-92) Page 2 of 3 Continue on Page 3

EPA ID Number (copy from Item 1 ofFomr 1)
Continued from Page 2 INCO004774
II. Discharge Information
A, 8, C, & D: See instructions before proceeding. Complete one set of fades for each outfall. Annotate the outfall number in the space provided.
Table VII -A, VII -8, V11 -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) m No (go to Section D()
III. 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) 0 No (go to Section IX)
IX. Contract Analysis Information
Were any of the analyses reported in Item VII performed by a contract laboratory or consulting firm?
m Yes (list the name, address, and telephone number of, and pollutants JE] No (go to Section X)
analyzed by, each such laboratory or firm below)
A. Name B. Address C. Area Code & Phone No. D. Pollutants Analyzed
Pace Analytical Services, Inc. 9800 Kincey Ave, Suite 100 [phone] Oil and Grease
Hunteraville, NC 28078
X. Certification
1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure
that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons
directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete 1 am aware that
there ere significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.
A Name & Official Title (Type Or Print) B. Area Code and Phone No
Henry A. Botkins; General Manager II Reg. Stations [phone]
C. Signature D Date Sign
01
EPA Form 3510-21' (1-92) Page 3 of 3

EPA ID Number (copy from Item 1 o/Form 1) Form Approved. OMB No. 2040-0086
CO004774 I ADoroval 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
(ifavadable)
Maximum Values
(include units)
Average Values
(include units)
Number
of
Storm
Events
Sampled
Sources of Pollutants
Grab Sampe
Taken During
First 20
Minutes
Flow -Weighted
Composite
Grab Sample
Taken During
First 20
Minutes
Flow -Weighted
Composite
Oil and Grease
NIA
See attached supplemetal
Biological Oxygen
Demand (BODS)
information
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 •:s operating under an existing NPDES permit). Complete one table for each outfall. See the instructions for additional details and
requirements.
Maximum Values Average Values
(include units) (include units)
Pollutant Grab Sample Grab Sample
and Taken During Taken During
CAS Number First 20 Flow -Weighted First 20 Flow -Weighted
(ifavailable) Minutes Composite Minutes Composite
Number
of
Storm
Events
Sampled Sources of Pollutants
See attached supplemental
information
EPA Form 3510-2F (1-92) Page VII -1 Continue on Reverse

vV 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
Maximum Values Average Values
(include units) include units) Number
Pollutant Grab Sample Grab Sample Of
and Taken During Taken During Storm
CAS Number First 20 Flow -Weighted First 20 Flow -Weighted Events
(ifavailable) Minutes Composite Minutes Composite Sampled Sources of Pollutants
See attached supplemental
information
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)
7 Provide a description of the method of flow measurement or estimate.
EPA Form 3510-2F (1 92) Page VII -2

BUCK STEAM STATION
Stormwater Discharge Permit Application
Form 2F Supplemental Information
NPDES Permit #NC0004774

GENERAL SITE INFORMATION
Buck Steam Station is a previously active fossil -fueled, electric generating plant located in
Rowan County approximately three miles east of Spencer, North Carolina. The station has six
retired coal-fired generating units that are in the process of being decommissioned. The original
two coal-fired units (Units 1 and 2) were put into service in 1926. Units 3 and 4 were retired in
mid -2011, and Units 5 and 6 were retired in April 2013. The station also had three oil- or gas-
fired combustion turbine units (Units 7, 8, and 9) that were retired in October 2012. The Buck
Steam Station property encompasses approximately 643 acres that border 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 facility includes the Powerhouse, the former coal
storage yard located south of the Powerhouse that encompasses approximately 4 acres, the
Units 3 and 4 Switchyard located immediately east of the Powerhouse that encompasses 1
acre, and the Units 5 and 6 Switchyard located immediately southwest of the Powerhouse that
encompasses 1.3 acres. The facility also contains a coal unloading and handling operation, two
warehouses, an empty fuel oil storage tank and associated fuel oil unloading station, paved
parking areas, rail lines, paved roadways, and gravel -surfaced roadways. The former coal-fired
and oil -fired station generation area encompasses approximately 50 acres. The station is
currently being decommissioned and most structures formerly associated with coal-fired and oil-
fired generation will be demolished.
The facility also includes three active ash settling basins (the new primary cell, the old primary
cell, and the secondary cell) located generally southeast of the station Powerhouse. These
three basins are interconnected and have a combined total natural drainage area of
approximately 372 acres. An additional approximately 73 acres of stormwater runoff from
certain station yard areas is also routed to the yard sump and subsequently pumped to this ash
basin system. Discharge structures conveying stormwater runoff at Buck Steam Station include
various corrugated metal pipes (CMP) and steel pipes.
Also located within the Buck Steam Station property boundary is the Buck Tie Station and the
Buck Combined Cycle (CC) Station. The Buck Tie Station is a large 230 kV and 110 kV
regional substation facility located within the Buck Steam Station property boundaries
approximately 1,500 feet south and upgradient of the Powerhouse. This tie station is a separate
facility unassociated with the Buck Steam Station, and is neither inspected nor maintained by
Buck Steam Station personnel. The Buck Combined Cycle (CC) station is a new generating
facility located south of the Buck Tie Station. The station came online in late 2011. The Buck
CC is located upgradient and is hydraulically unassociated with the Buck Steam Station from a
stormwater permitting standpoint.
Buck Steam Station maintains an up-to-date Spill Prevention Control and Countermeasure
(SPCC) Plan in place in accordance with the U.S. Environmental Protection Agency (USEPA)
Oil Pollution Prevention Regulation 40 CFR Part 112.

STORMWATER OUTFALLS AND DRAINAGE AREA DESCRIPTIONS
Buck Steam Station has five NPDES process water outfalls summarized as follows:
• NPDES Outfall 001 — Once -Through Cooling Water
This discharge is a once -through non -contact cooling water (CCW) system that
previously condensed steam from the plant condensers when the station was active.
This discharge occurred directly to the Yadkin River.
NPDES Outfall 002 — Ash Basin
This is the outflow from the ash settling basin system. The ash settling basins are the
repositories for waste ash sluiced from the station. Stormwater runoff from the coal
storage pile and from industrial use areas surrounding the Powerhouse is routed into the
station yard sump that subsequently pumps to the ash basins. The ash basin system is
also the repository for various wastewater streams including effluent from the sanitary
system, filter backwashes, boiler blowdown wastes, demineralizer regeneration wastes,
boiler cleaning wastes, interior floor drain discharges, and various other minor waste
streams.
• NPDES Outfall 002A— Yard Sump Overflow
Should the pumps in the yard sump lose power, experience a mechanical failure, or
become inundated during a large storm event, the sump would overflow through a pipe
into the Yadkin River. Overflow from this sump is not a normal occurrence.
• NPDES Outfall 003 — Transformer Cooling Water
This outfall has been eliminated.
• NPDES Outfall 004 — Intake Screen Backwash
This discharge is a river water backwash of the station intake screens to remove the
typical river water debris that collects on the screens.
• NPDES Outfall 005 — Miscellaneous Equipment Cooling Water
These discharges are once -through non -contact cooling water from the Units 5 and 6
turbine lube oil coolers, condensate coolers, induced draft fans, forced draft fans, and
dewatering pumps. These discharges occurred though various outfalls including one
roof drain outfall (SW007) that discharge into the station intake area. These discharges
were then drawn into the station CCW system and subsequently discharged through
NPDES Outfall 001 when the station was active.
Buck Steam Station has 29 identified active stormwater outfalls (21 of which are Powerhouse
roof drains) that discharge to surface waters. The outfall locations and contributing drainage
area delineations are shown on the accompanying site plan drawing. All identified stormwater
outfalls either discharge directly into the Yadkin River, or discharge onto the ground in close
proximity to the river.
A description of the contributing drainage area for each outfall is provided below. Included with
the description is the approximate location coordinates of the outfalls, the approximate amount
of impervious surface area within the drainage areas, a description of any significant materials
and activities located within the drainage areas, the type of discharge conveyances, and a
description of any discharge control measures.
In addition to any significant materials particular to each drainage basin, herbicides are applied
to selected areas at Buck Steam Station to eliminate undesirable vegetation. Herbicides are
2

generally used along railways, ash pipelines, and the perimeter fence. Herbicides are also
applied, as needed, in the gravel parking lots, switchyard, and laydown areas. Herbicides are
sprayed around the fuel oil bulk storage tanks, yard sump, transformers, trailers, and the intake
structure. All herbicides used at Buck Steam Station are approved by the company and
considered safe to the environment when used according to directions. Records are retained at
the facility documenting the areas treated, and the type and amount of herbicides used.
Outfall SW001 (Drainage Area 1)
Discharge Structure: 12 -inch -diameter CMP
Location: West of Units 5 and 6 Switchyard, outside of station fence
Coordinates: 350 42'44" N 800 22'46" W
Drainage Area: 3.3 acres
Impervious Area: 15 percent
Area Description
Drainage Area 1 includes most of the vendor paved parking lot, part of the Units 5 and 6
Switchyard, and the grassed yard areas southwest of the Units 5 and 6 Switchyard. The
drainage area is mostly flat with slight grading of paved surfaces towards the drop inlets and
curbing containing grassed islands. The Switchyard has a gravel surface. Circuit breakers are
located within concrete containments with open drains that discharge to an 8,000 -gallon -
capacity oil trap tank. Transformers are provided containment by nearby yard drains that
discharge into the oil trap tank. The ground cover is approximately 0.5 acre of paved parking
lot, approximately 0.3 acre of gravel area, and approximately 2.5 acres of grassed yard areas.
Significant Materials/Controls
Oil: Mineral oil is stored inside various transformers and circuit breakers located in the Units
5 and 6 Switchyard. Stormwater runoff is conveyed via open drains and yard drains into
an 8,000 -gallon -capacity oil trap tank. The largest transformer contains 5,250 gallons of
mineral oil, with the total quantity of mineral oil contained in all the electrical equipment
being approximately 55,700 gallons. An 8,000 -gallon -capacity oil trap tank is available
for the oil -filled electrical equipment located in Drainage Area 1.
Outfall SW002 (Drainage Area 2)
Discharge Structure: 21 -inch -diameter CMP
Location: West of Units 5 and 6 Switchyard, outside of station fence
Coordinates: 350 42'47" N 800 22'45" W
Drainage Area: 2.3 acres
Impervious Area: 20 percent
Area Description
Drainage Area 2 is comprised of approximately 1 acre of the gravel -surfaced Units 5 and 6
Switchyard, a small paved area beneath the Units 8 and 9 Precipitators located north of the
Switchyard, and approximately 0.3 acre of paved parking located west of the Switchyard. The
remainder of the drainage area is grassed yard.
Most electrical equipment containing mineral oil located in the Units 5 and 6 Switchyard is
situated within curbed concrete containment pads with open drains to a 15,000 -gallon -capacity
oil trap tank. The tank is located west of the station access road.
Significant Materials/Controls
Oil: Mineral oil is stored inside various transformers and circuit breakers located in the Units
5 and 6 Switchyard. Stormwater runoff is conveyed via open drains into a 15,000-
3

gallon -capacity oil trap tank. The largest transformer contains 5,250 gallons of mineral
oil, and six small transformers located on the Units 8 and 9 Precipitators structure have a
total capacity of 1,776 gallons of mineral oil. The total quantity of mineral oil contained in
all the electrical equipment is approximately 55,700 gallons. A 15,000 -gallon -capacity oil
trap tank is available for the oil -filled electrical equipment located in Drainage Area 2.
Outfall SW003 (Drainage Area 3)
Discharge Structure:
10 -inch -diameter CMP
Location:
West End of Powerhouse
Coordinates:
350 42'50" N 800 22'40" W
Drainage Area:
0.6 acre
Impervious Area:
50 percent
Area Description
The drainage area for SW003 encompasses the Service Building roof, a small storage shed
roof, a covered compressed gas storage pad, a vapor extraction tank, paved driveways, and
landscaped areas on the west side of the Service Building.
Significant Materials/Controls
Oil: Used oil is captured and stored in a 150 -gallon -capacity vapor extraction tank. The tank
is located within a concrete containment basin with a closed and locked manually
operated drain valve. The containment contents are inspected prior to draining.
Outfall SW048 (Drainage Area 48)
Discharge Structure: 15 -inch -diameter steel pipe
Location: North of Units 3 and 4 Switchyard, outside of station fence
Coordinates: 350 42'50" N 800 22'29" W
Drainage Area: 0.4 acre
Impervious Area: 0 percent
Area Description
Drainage Area 48 is comprised entirely of the western half of the Units 3 and 4 Switchyard. The
drainage area is gravel surfaced. Electrical equipment including transformers and circuit
breakers is located within curbed concrete containment pads with manually operated drain
valves.
Significant Materials/Controls
Oil: Mineral oil is stored inside various transformers and circuit breakers within the Units 3
and 4 Switchyard. This includes four large transformers containing a total of 18,081
gallons of mineral oil, and nine circuit breakers containing a total of 765 gallons of
mineral oil. All electrical equipment is located within concrete containments with closed
and locked, manually operated drain valves. Containment contents are inspected prior
to draining.
4

Outfall SW073 (Drainage Area 73)
Discharge Structure: 36 -inch -diameter CMP
Location: Approximately 400 feet east of yard sump, outside of station fence
Coordinates: 350 42'50" N 800 22' 17" W
Drainage Area: 15.9 acres
Impervious Area: 0 percent
Area Description
Drainage Area 73 is comprised of a large, primarily vegetated area located east of Drainage
Area 56. The drainage area contains approximately 1,000 linear feet of rail lines and
approximately 2,000 linear feet of gravel -surfaced roadway.
Significant Materials/Controls
Coal: Train cars carrying coal previously used the rail lines that pass through the drainage
area.
Outfall SW075 (Drainage Area 75)
Discharge Structure: 30 -inch -diameter CMP
Location: Approximately 150 feet east of yard sump, outside of station fence
Coordinates: 350 42'49" N 800 22'22" W
Drainage Area: 0.2 acre
Impervious Area: 0 percent
Area Description
The drainage area for SW075 is comprised entirely of a gravel roadway and gravel -surfaced
areas surrounding rail lines near the yard sump. The drainage area contains approximately 500
linear feet of rail lines and approximately 250 linear feet of gravel roadway.
Significant Materials/Controls
Coal: Train cars carrying coal previously used the rail lines that pass through the drainage
area.
Outfall SW077 (Drainage Area 77)
Discharge Structure: 36 -inch -diameter CMP
Location: Between Units 3 and 4 Switchyard and the yard sump, outside of station
fence
Coordinates: 350 42'50" N 800 22'25" W
Drainage Area: 0.7 acre
Impervious Area: 0 percent
Area Description
The drainage area for SW077 is comprised primarily of gravel -surfaced areas surrounding rail
lines near the yard sump. The drainage area also includes portions of a grassed embankment
north of the combustion turbine units. Approximately 1,200 linear feet of rail lines are located
within the drainage area.
Significant Materials/Controls
Coal: Train cars carrying coal previously used the rail lines that pass through the drainage
area.
5

Powerhouse Roof Drain Outfalls
(Outfalls SW005, SW007, SW011, SW015, SW016, SW023, SW025, SW027, SW032, SW034,
SW035, SW038, SW039, SW058, SW065, SW066, SW067, SW069, SW070, SW071 and
SW072)
Discharge Structure: Small diameter steel pipes
Location: North face of Powerhouse; discharge directly into the station intake area
Coordinates: 350 42' 50" N 800 22' 32" W (general area)
Drainage Area: 1.9 acres (total)
Impervious Area: 100 percent
Area Description
The drainage areas for these outfalls are comprised entirely of various sections of the
Powerhouse roof. These outfalls are mounted on the north face of the Powerhouse wall and
discharge directly into the river in the station intake area. Only Outfall SWO05 is accessible. All
of these outfalls will be eliminated during upcoming demolition of the Powerhouse and should
be excluded from permitting considerations
Significant Materials/Controls
No significant materials are located in this drainage area.
[ei

REMAINING DRAINAGE AREA DESCRIPTIONS
This section describes drainage areas at the station that:
a. Convey stormwater runoff into the station yard sump system that is subsequently
pumped to the ash basin,
b. Convey stormwater runoff from non -industrial use areas of the site,
c. Convey stormwater runoff as sheet flow (non -point source).
The Buck Steam Station has one yard sump that receives stormwater runoff from approximately
73 acres of the station and subsequently pumps this runoff to the ash basin system. Rarely
occurring emergency sump overflows will discharge directly to the Yadkin River as NPDES
Outfall 002A — Yard Sump Overflow.
Located within the yard sump stormwater drainage area are the following:
• The approximately 43 -acre drainage area of Outfall SW056;
• Paved- and gravel -surfaced areas located generally southeast of the Powerhouse;
• All coal handling buildings, maintenance sheds, conveyors and equipment;
• Two warehouses, the Office/Shop Building, and the Units 5 through 7 Precipitators; and
• Approximately 4,000 linear feet of rail lines.
Outfall SW056 (Drainage Area 56)
Discharge Structure: 36 -inch -diameter CMP
Location: Between Units 3 and 4 Switchyard and the yard sump, outside of station
fence
Coordinates: 350 42'50" N 800 22'27" W
Drainage Area: 43 acres
Impervious Area: 5 percent
Area Description
Drainage Area 56 is comprised of a large, primarily vegetated area located southeast of the
Powerhouse with approximately 3,500 linear feet of paved roadway and approximately 2,000
linear feet of gravel roadway. Located within Drainage Area 56 are the combustion turbine
area, the Main Fuel Oil Storage Tank, the tanker truck fuel oil unloading station, and
approximately 1,400 linear feet of aboveground fuel oil piping. The Main Fuel Oil Storage Tank
and containment dike encompass approximately 2.5 acres. The tanker truck unloading station
is a paved area covering approximately 0.2 acre located northeast of the tank. The combustion
turbine area covers approximately 2.5 acres that are paved or gravel -surfaced. External areas
outside of the perimeter road are grassed.
Stormwater runoff from Drainage Area 56 is processed through two oil trap tanks located in
series on the northern end of the drainage area. The 30,000 -gallon upgradient tank discharges
into a 65,000 -gallon -capacity oil trap tank. Stormwater runoff from some portions of the drainage
area is routed into the 30,000 -gallon oil trap tank, while runoff from other portions of the area is
routed directly into the 65,000 -gallon oil trap tank. This drainage system includes a below -grade
concrete diversion structure installed to route discharge from the 60,000 gallon oil trap tank to
the station yard sump. The sump subsequently pumps this discharge to the ash basin system.
The diversion structure was designed to allow runoff in excess of a 2 year design storm event to
bypass the sump and discharge through Outfall 56. The outfall was fitted with a rubber flapper
outlet to prevent any backflow from occurring to the sump during high river levels. The outlet is
typically partially submerged.
7

Stormwater discharges will not normally occur through Outfall 56. Most stormwater runoff from
Drainage Area 56 will discharge to the yard sump and be pumped to the ash basin system.
Considering the partially, or likely completely, submerged conditions of the outlet during such
events, no stormwater sample collection is possible at the outlet. Sample collection is only
possible at the upstream manway in the concrete diversion structure and only possible during
an extreme storm event. Consequently, Outfall SW056 should be excluded from permitting
considerations.
Sianificant Materials/Controls
Oil: Lube oil is stored inside three 175 -gallon -capacity turbine lube oil tanks located
inside the enclosures for the three combustion turbine units. Miscellaneous oils
are stored in 55 -gallon drums inside the combustion turbine maintenance shed
(typically 4 drums), and adjacent to each combustion turbine unit (typically 2
drums at each unit).
Battery Acid: Battery acid is present in batteries stored inside the combustion turbine control
room building.
Coal Ash: Coal ash located within the 1,300 linear feet of ash sluice lines passes through
Drainage Area 56 from the Powerhouse to the primary cell of the ash basins.
Non -Point Source Runoff from Eastern Portion of Units 3 and 4 Switchyard
The eastern half of the Units 3 and 4 Switchyard is gravel -surfaced and does not have any
significant materials or activities contained within this area. The majority of any precipitation
falling on this area will soak into the gravel bed of the Switchyard. This drainage area should be
excluded from permitting considerations.
Non -Point Runoff Area East of Units 3 and 4 Switchyard
This approximately 1 -acre area is located east of the Units 3 and 4 Switchyard and is primarily
gravel -surfaced. The area contains the yard sump and the yard sump service transformer. The
transformer contains 188 gallons of mineral oil, and is located inside a concrete containment pit
with an open drain to the yard sump. Stormwater runoff flows northerly overland to the Yadkin
River. This drainage area should be excluded from permitting considerations.
Station Paved Parking Lot and Landscaped Areas Northwest of Units 5 and 6 Switchyard
The non -industrial use areas contain portions of the station paved parking lot, grassed lawn
areas, and landscaped areas located northwest of the Units 5 and 6 Switchyard. Some
stormwater runoff from these areas enters catch basins that discharge through either a 12 -inch -
diameter CMP or a 4 -inch -diameter plastic pipe into the Yadkin River northwest of the areas.
Other stormwater runoff discharges to northwest into the Yadkin River as non -point source
runoff. No significant materials or activities are located within these areas. This drainage area
should be excluded from permitting considerations.
Station Access Road
Several culverts beneath the station access road direct stormwater toward the Yadkin River
from non -industrial use yard areas located east of the road. The exterior vegetated
embankment slopes of the new primary ash basin are located within this area. These culverts
and contributing drainage areas should be excluded from permitting considerations.
0

IDENTIFICATION OF PAST LEAKS AND SPILLS
Within the past three years, there have not been any significant spills of hazardous substances
in excess of reportable quantities set forth by Section 311 of the Clean Water Act or Section 102
of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
All significant spill incidents are logged by the Environmental Coordinator, and the necessary
updates are made to the various related plans and procedures. All environmental incidences at
Buck Steam Station are stored for review in eTrac.
IDENTIFICATION OF NON-STORMWATER DISCHARGES
A visual assessment for non-stormwater discharges was conducted on September 22, 2014.
Each accessible outfall was observed for outflow after a period of at least 72 hours of dry
weather. Outfalls SW001, SW002, SW048, SW073, SW075, and SW077 were dry at the time
of observation. Outfall SWO03 had a fast drip that appeared to originate from stormwater runoff
retained within a drop inlet located in the circle driveway.
MONITORING AND SAMPLING
There are 29 stormwater outfalls at Buck Steam Station. Many of these outfalls convey
stormwater from areas of substantially identical activities and materials. Stormwater Outfalls
SW001,SW002, SW003, SW005, SW048, SW073, SW075, and SW077 are accessible for
sampling. Stormwater Outfalls 007, 011, 015, 016, 023, 025, 027, 032, 034, 035, 038, 039, 056,
058, 065, 066, 067, 069, 070, 071, and 072 are inaccessible. All Powerhouse roof drains
(including SW005) will be eliminated during demolition of the Powerhouse and should be
excluded from any permitting requirements.
N

• •
♦,w _ -----------
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BUCK COMBINED
CYCLE STATION
PLAN
SCALE: 1"= 200'
N
DRAINAGEAREA
OUTFALL DESCRIPTION
RECEIVING WATER BODY
1
12"0 CMP
YADKIN RIVER
2
21"0 CMP
YADKIN RIVER
3
10"0 CMP
YADKIN RIVER
48
15"0 STEEL PIPE
YADKIN RIVER
73
36'0 CMP
YADKIN RIVER
75
30"0 CMP
YADKIN RIVER
77
31".0n CMP
YADKIN RIVER
POWERHOUSE ROOF*
21SMALL w STEEL PIPES
YADKIN RIVER
*NOT RECOMMENDED FOR SAMPLING
DESIGNED BY:
4
CHECKED BY:
APPROVED EIT
HDR Engineering, Inc. of the Carolinas License Number: F-0116 _ _ _ _ _
440 S Church Street, Suite 1000 Charlotte, NC 28202.2075 PE SEAL NO. DATE REASION I DRN DSGN.CHKDI APPR CIVIL I ELEC MECHI PROJECT NUMBER
1 A R a
KEY NOTE:
ODRAINAGE AREA
�C
MFJ
LEGEND:
PUMP TO ASH BASIN
■ w w
DRAINAGE AREA BOUNDARY
PH RD OUTFALL SWXXX
POWERHOUSE ROOF DRAIN OUTFALL SWXXX
STRUCTURE LEGEND: E
0
UNITS 5 & 6 SWITCHYARD
0
N8 & 9 PRECIPITATOR
0
N8 & 9 BOILERS
®
UNITS 5 & 6 TURBINE ROOM
O
MACHINE SHOP
©
N5. 6 & 7 PRECIPITATORS
0
WAREHOUSE
®
OFFICE/SHOP
D
0
p4 WAREHOUSE
10
UNITS 3 & 4 SWITCHYARD
11
UNIT 9C
12
CONTROL ROOM
13
UNIT 7C
14
MAIN CT TRANSFORMER
15
YARD SUMP
16
65,000 GAL, OIL TRAP TANK
17
C
30,000 GAL, OIL TRAP TANK
18
BOAT HOUSE
19
UNIT 8C
20
FUEL OIL TANK
200 0 200 400
SCALE IN FEET
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION
SITE PLAN
STORMWATER OUTFALLS
au"Nwe"rrT No.
1"=200' SHEET 1
R
Is