NC0024406_Authorization to Construct_19990210

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Duke
Powerm,
A Duke Energy Company
February 10, 1999
Mr. Tom Belnick
North Carolina Department of Environment
And Natural Resources
Division of Water Quality
NPDES Unit
P.O. Box 29535
Raleigh, North Carolina 27626-0535
Subject: Belews Steam Station
NPDES Permit No. NC0024406
Authorization To Construct
Oil/Water Separator
Certified Z 461 938 579
Dear Mr. Belnick:
Duke Power Company
A Duke Energy Company
Group Environmental, Health &
Safety
13339 Hagers Ferry Road
Huntersville, NC 28078-7929
Installation of the oil/water separator at Belews Creek Steam Station is complete.
Enclosed is the certification of completion of construction per the requirement of the
authorization to construct permit. The Winston-Salem Regional Office has been notified
that initial operation is planned for February 17, 1999.
If you have any questions, please contact Ron Lewis [phone].
Sincerely,
AV -11A A -
Angela M. Grooms
Manager, Water Protection
REL
Enclosure
cc: Mr. David Russell NCDENR, Winston Salem Regional Office
r C

.J?,zrinit No NG0024406
Authorization- t6 Construct
AC0024406
Duke Power- Belews-Creek- Steam Station
August 14, 1998
Page 3
a �r
Engineer's Certification
I, Q;cl ,,rd'E. &Ver Sr. , as a duly re istered Professional Engineer in the State of North
Carolina, having been authorized to observe 4 eriodic ,weekly, full time) the construction of the
project, Me.a,s geek S}ec,rr. 5+Jio.°, 5+ekQs CoLin11 for the
Project Name Location
Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation
the construction -of the _oil/water.separator such that the construction was observed. -to be. built.within
substantial co p 'ance and ' ent f the approved plans and specifications.
Signature L�ARegistration No.
Date
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LEGEND:
0 - MONITORING WELL
® -MONITORING WELL DE
0 RECOVERY WELLS
Qe-MUL71LEVELSAMPLEF
LOCATION
OF OILANATER
SEPARATOR
Zlilikii
—I' I II I
1 II �� I' II II I
90RW42 ED
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I
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0 MWS
wol
MWd®
MW -10
MWA
® M L10
MW -12
MW -13
10O EO EO 40 20 0 100
SCALE IN FEET
DUKE POWER COMPANY
BELEWS CREEK STEAM STATION
FIGURE:
LOCATION
OF OIL/WATER
SEPARATOR

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
August 14, 1998
Mr. Maurice D. McIntosh, V.P.
Fossil/Hydrogeneration Dept.
Duke Power Company
NCSR 1908
Walnut Grove, North Carolina 27052
rX;WA
DEN R
Subject: Permit No. NCO024406
Authorization to Construct
Belews Creek Steam Station
Stokes County
Dear Mr. McIntosh:
A letter of request for Authorization to Construct was received June 16, 1998 by the Division and
final plans and specifications for the subject project have been reviewed and found to be satisfactory.
Authorization is hereby granted for the construction of facilities at the Duke Power- Belews Creek
Steam Station wastewater treatment system discharging into an ash basin, which then discharges via
NPDES-permitted Outfall 003 to the Dan River (Class WS -IV) in the Roanoke River Basin.
Specifically, authorization is granted for the following construction activities:
• Installation of an oil/water separator to treat gasoline -contaminated groundwater, with discharge
of treated groundwater to the ash basin.
This Authorization to Construct is issued. contingent on the following conditions:
Following installation and start-up, the permittee will monitor on a monthly basis for the
following parameters at Outfall 003: benzene, toluene. Suitable laboratory detection limits will be
1 ug/1. If concentrations are below levels of concern (i.e., benzene <1.19 ug/1; toluene < 11.0 ug/1)
during the first six monthly sampling events, monitoring may be discontinued. Monthly
monitoring results should be sent to: North Carolina DENR-DWQ, NPDES Unit, Attn: Tom
Belnick, P.O. Box 29535, Raleigh, North Carolina, 27626-0535.
If monitoring indicates that gasoline components are discharging to the Dan River at levels of
concern, then the treatment system will be shut down until additional treatment system
components, such as air stripping and/or granular activated carbon, are installed.
• Recovered petroleum product will be drummed/tanked and disposed of with other petroleum
product collected at the site, in accordance with applicable local, state, and federal regulations.
This Authorization to Construct is issued in accordance with Part III, Paragraph B of NPDES
Permit No. NCO024406 issued January 15, 1998, and shall be subject to revocation unless the
wastewater treatment facilities are constructed in accordance with the conditions and limitations
specified in Permit No. NC0024406. Failure to abide by the requirements contained in this
Authorization to Construct may subject the Permittee to an enforcement action by the Division of Water
Quality in accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

Permit No. NC0024406
Authorization to Construct
AC0024406
Duke Power- Belews Creek Steam Station
August 14, 1998
Page 2
The issuance of this Authorization to Construct does not preclude the Permittee from complying
with any and all statutes, rules, regulations, or ordinances which may be imposed by other government
agencies (local, state, and federal) which have jurisdiction. The sludge generated from these treatment
facilities must be disposed of in accordance with G.S. 143-215.1 and in a manner approved by the North
Caroline Division of Water Quality. The Operational Agreement between the Permittee and the
Environmental Management Commission is incorporated herein by reference and is a condition of this
permit. Noncompliance with the, terms of the Operational Agreement shall subject the Permittee to all
sanctions provided by G.S. 143-215.6 for violation of or failure to act in accordance with the terms and
conditions of this permit.
Upon classification of the facility by the Certification Commission, the Permittee shall employ a
certified wastewater treatment plant operator to be in responsible charge (ORC) of the wastewater
treatment facilities. The ORC must hold a certificate of the type and grade at least equivalent to or
greater than the classification assigned to the wastewater treatment facilities by the Certification
Commission. The Permittee must also employ a certified back-up operator of the appropriate type and
grade to comply with the conditions of Title 15A, Chapter 8A, .0202.
In the event that the facility fails to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those as may be required by
this Division, such as the construction of additional or replacement wastewater treatment or disposal
facilities.
The Mooresville Regional Office, telephone number [phone], shall be notified at least
forty-eight (48) hours in advance of operation of the installed facilities so that an on-site inspection can
be made. Such notification to the regional supervisor shall be made during the normal office hours from
8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays.
Upon completion of construction and prior to operation of this permitted facility, a certification
must be received from a professional engineer certifying that the permitted facility has been installed in
accordance with the NPDES Permit, this Authorization to Construct, and the approved plans and
specifications. Mail the completed certification to: North Carolina DENR-DWQ, NPDES Unit, P.O.
Box 29535, Raleigh, NC 27626-0535.
One (1) set of approved plans and specifications is being forwarded to you. A copy of the
approved plans and specifications shall be maintained on file by the Permittee for the life of the facility.
If you have any questions or need additional information, please contact Tom Belnick, telephone number
[phone], extension 543.
Sincerely,
��Id
. Preston Howard, JrV, P.E.
cc: Central Files
NPDES Unit
Mooresville Regional Office, Water Quality
Technical Assistance and Certification Unit
Angela M. Grooms
Duke Power, Group Environment, Health and Safety,
1333,9 Hagers Ferry Road, Huntersville, NC 28078-7929

ATC Review
Oil/Water Separator
NCO024406 (AC0024406)
Duke Power — Belews Creek Steam Station
Prepared by: Tom Belnick, NPDES Unit - �
Date: August 4, 1998
Current System: Duke Power operates a Steam Station at the site, which is currently permitted under
NCO024406 for an ash basin discharge via Outfall 003 to the Dan River (Class WS -IV) in the
Roanoke River Basin. This permit expires February 28, 2002. Groundwater at the Duke site is
contaminated with gasoline (including free product), and remediation efforts have been ongoing
since 1992 (free product skimming and vapor recovery). In order to increase groundwater
remediation efforts, Duke Power is proposing to increase groundwater withdrawal in the area, and
route this wastestream at a maximum flow rate of approximately 14 gpm (<0.02 MGD) through an
oil/water separator. The removed petroleum product will be drummed/tanked and disposed of with
other petroleum product collected at the site. The treated groundwater effluent will be routed to
station sumps and then to the permitted ash basin, which has an average discharge of approximately
7.4 MGD to the Dan River. According to Richard Baker (Duke Power, 704-373-7889), conservative
maximum concentrations anticipated in the groundwater are 390 ug/l (benzene) and 130 ug/l
(toluene), and he expects petroleum removal up to 90% from the O/W separator.
2. NPDES Review: The specs for the proposed oil/water separator (Hydro -Flo Technologies, Model
DP -4) state the unit is designed to provide effective treatment to a flow rate of 14 gpm. The average
inflow rate for the Duke site is estimated to be less than 10 gpm, therefore the proposed unit is
correctly sized. In addition, disposal plans for recovered petroleum product are specified.
Currently, general permits for petroleum contaminated groundwater (gasoline) contain limits for TSS
(30 mg/1), benzene (71.4 ug/1, or 1.19 ug/l for discharge to WS stream), and toluene (11 ug/1), with
monthly monitoring requirements. Based on the available dilution in the ash pond prior to discharge
to Dan River (Dilution= 7.4 MGD/0.02 MGD= 370x), Goodrich suggested that we proceed with
ATC, but include some contingencies (including monitoring) to evaluate system performance. I've
included the following contingencies in the ATC: 1) monthly monitoring for benzene and toluene for
6 months; 2) if monitoring results exceed general permit limits, treatment system will be shut down
until additional treatment components (air stripper, GAC) are installed; and 3) recovered petroleum
product will be drummed/tanked and disposed of in accordance with applicable local, state, and
federal regulations.
3. Region Review: MRO review (dated 7/9/98) recommends this ATC be issued. MRO states that the
proposed discharge from the oil/water separator is small relative to the ash basin and would have no
measurable impact.
4. EEII Review.

NORTH CAROLINA DEPARTMENT OF ENVIRONMENT
AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
July 9, 1998
MEMORANDUM
TO: Tom Belnick
NPDES Unit
THROUGH Larry oble
Water Quality Supervisor, WSRO
FROM: David Russell
Environmental Specialist - W SRO VIL
SUBJECT: Authorization to Construct
Oil/Water Separator
Duke Power - Belews Creek Steam Station
ATC Number AC0024406
Stokes County
Duke Power holds NPDES Permit No. NC0024406. One Outfall #003 covered by the
permit is for an ash basin discharge of approximately 7.5 mgd. This ATC is for an oil/water
separator to treat contaminated groundwater at the Belews Creek Steam Station. The system will
generate a flow of less than 0.03 mgd which would be discharged to the ash basin. This small
volume of additional water to the ash basin would have no measurable impact to the ash basin
discharge.
It is recommended that an ATC be issued for this oil/water separator.
cc: WSRO
Central Files c_

t400
Iort,_rolina Department of Natural
Resources &Community'Development,�
James B. Hunt, Jr., Governor James A. Summers, Secretary
March 2, 1984
sir:: S. B. Hager., Chief Engineer
Civil - `I;nvronne`stal Division
Duke. Power. Company
P.-.'&. Box143 3189 - _::
Char.lo.tte', worth Carolina 28242
SUBJECT: Permit No. NC0024406
DIVISION OF
ENVIRONMENTAL
MANAGEMENT
Robert F. Helms
Direc*or
Telephone [phone]
Authorization to Construct
Duke Power Company
Belews Creek Steam Station
Alternate Ash Basin Discharge System
Stokes County
Dear Mr. Hager:
A letter` -of request for Authorization.to Construct was received February
6,'1984, by the Division and final plans and specifications for the subject
project have been reviewed and found to be satisfactory. Authorization is
hereby granted for the construction of an alternate ash basin discharge facility
consisting of a new concrete drainage tower or with multiple level weirs to
enable flow regulation, a canal, an earthen dike, approximately 1,640 lineal
feet of 24 -inch diameter discharge pipe, and an impact stilling basin to be
added to the existing site facilities to serve the Belews Creek Steam Station.
tkti , Au:thorz_zation to Construct is issued in accordance with Part III
paragraph C of: -"NKR
DES Permit'::!go ,NC002:4406;gasued January -,27, 1984, .and shall
tip sub`jet toVocaf ori ;unless tYie'wastewater treatment .facilities are con-
stt-ucted iri'r''accordatrce. -with-the.:,conditi.oris.-and limitations specified in Permit
No;..,_NC0:024406 ,
'The .Permit di must emplo
y •,a. certified -wastewater, operator in accordance
with Part II'I ga agraph A`of the referenced.per'
The,"sludge generated'from.:hese treatment fac;li:'ties_. must„ be disposed of
in accordaircerwlffi Geral: Statute 143 215.1 _and sn} 'a manner. -approvable by the
ioi li:,Carolina D%LViszi6h`__of :Ener xonmer -al ManagemO"
In .event
the: facilities- fail to.::perform satisfactorily. in meeting it's
NPI)ES permit eff vent :3 zm� ts, the Duke . Power Coifipany shall- l=ake . such
int4iaiate corrective' `action .as.. may be required by --this Division,-,. 'including
the: -:-construction 'df, --additional. wast-ewater:.treatment and .disposallacilities..
Colka.
P. 0. Box 27687 Raleigh, N. C. 27611-7687
An Equal Opportunity Affirmative Action Employer

Permit No. NCO024406
T rlr. S. B. Hager
One (1) set of approved plans and specifications is being forwarded to
you. If you have any questions or need additional information, please contact
Mr. A. R. Hagstrom, telephone number 919/733-5083, ext. 102.
Sincerely yours,
Original Signed By
FORREST R. WESTALL
FOR
Robert F. helms
cc: Stokes County Health Department
Mr. W. J. McCabe, Design Engineer II
Winston-Salem Regional Surft,_-'_,rvisor
Mr. Forrest R. Westall
ARH/cgc

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IEV DATE JOB NO. PROJECT TYPE DES JDFTR CHKD EP1GR APPD {l DESCRIPTION SCALE: AS NOTED DES: RSE/. TLS BELENJS CREEK PERMANENT PUh1PIPlG PROJECT
Duke I)V;G TYPE! ACRO DFTR: 1r,•�C DUKE POWER BELEWS CREEK, NC
®Ene,rgya J08 ND:50017459 CHKD: DAH FDR COMPREHENSIVE SITE LAYOUT
DATE:OGTOBER, 2008 ENGR: ASE DWG SIZE DRAWING NO. SHEET NO. REVISION
FILENAME: 2008. 10. 10' - F-'NATER APPD: RSE ANSI 50017459 FIGURE 1 1
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�, Dewberry'o.�/
Dewbeny &Davis, Inc.
D
ANVILLLLE, FOREST 245540R�
PHONE: [phone]
FAX: [phone]
LEGEND D' 20' 4o Bo' , h�°iCC
CONTOUR E.O.W. — 562 / / h o
50'x120' PERMANENT
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CONTOUR 560 — 561 'APPROXIMATE OUTER LIMIT / / PUMP
CONTOUR 559,1 — 560 (TOE) OF COFFERDAM FINALSTATION
;'CONTOUR 558 -559/ RESTORED
CONTOUR ,557,'---558 - - /• / GRADE
CONTOUR•,556 TOP OF ~"
EX. BANK / 2.5:1 SLOPES
NOTES: (TYP.) HW=571.00
c 1. STREAM -BANKS TO BE
REVEGETATED WITH "NATIVEA%
MATERIAL. E.O.W.
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N 45' BEND
PERMANENT 10 DIAMETER'DISTUR
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_0+20
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REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGRI APPD DESCRIPTIONSCALE:
1•=40'
DES:
RSE/DAH BELEWS CREEK PERMANENT PUMPING PROJECT
DM TYPE: ACRD
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JOB NO:60017459
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DATE: OCTOBER, 2008
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SHEET NO.
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FILENAME: 2008.10.16 - F -WATER
APPD:
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Dewberry & Davis, Inc.
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DANVILLE. VA 24540 ol's
PHONE: [phone]
FAX, 434.797.4341
SCALE: 1" 40' 1
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REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD
ENGR APPI) DESCRIPTION
DUk
e
SCALE: ]°=40' DES: RSE/DAH
TITLE
B ELEWS CREEK PERMANENT PUMPING PROJECT
DUKE POWER BELEWS GREEK, NG
DWO TYPE: ACAD DFrR: kWC
laftrEner ®
gy
JOB N0:60017459 CHKD; DAH
FOR DIFUSSER SITE LOCATION IMPACT 01, 02
DATE: OCTOBER, 2008 ENGR: RSE
DWG SIZE DRAWING NO. SHEET NO.
REVISION
C)
FILENAME: 2008.10.16 F -WATER
APPD: HSE
ANSI
50017459 FIGURE 7
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Dewberry & Davis, Inc.
581 PINEY FOREST ROAD
DANVILLE. VA 24540
PHONE: [phone]
FAX: [phone]
58,1
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56C
552
584
576
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DAN RIVER
a 1 a 20' Q
W
SCALE: VERT. 1" = S'
HORIZ. 1" = 20'
WO YR FL00
=588.00'
REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD
DESCRIPTION
Duke
IEnergy®
_
SCALE: 1',40'
SVG TYPE: AGAD
DES:
OFTR:
RSE/DAH
WIC
TITLE BELEWS CREEK PERMANENT PUMPING PROJECT
DUKE . POWER BELEWS CREEK, NC
JOB N0:50017459 CHID: DAH
FOR - PERMANENT -IMPACT Sl, S3
z
a
DATE: OCTOBER, 2008 ENGR: RSE
DWG SIZE
DRAWING NO.
SHEET NO. REVISION
.
FILENAME:2008.10.18 = F -WATER
APPD:
ASE
0
- 50017459
FIGURE 9
T.O.B. 578.00'
(TYP.)
T.O.B. 578,00'
(TYP.)
AREA`ABC)V,
'55' SF
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UNOBSTRU
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LOCAL'' -ROC
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TO DEEPER
CHANNEL'
-'
584
576
568
-
552
—0+20.0 0+0 0 0+20.00 0+40.00 0+60.00 0+80.00 1 +00.00 1+20.00 1+40.00 1+60.00 1 +80.00 2+00.00
DAN RIVER
a 1 a 20' Q
SCALE: VERT. 1" = S'
HORIZ. 1" = 20'
REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD
DESCRIPTION
Duke
IEnergy®
_
SCALE: 1',40'
SVG TYPE: AGAD
DES:
OFTR:
RSE/DAH
WIC
TITLE BELEWS CREEK PERMANENT PUMPING PROJECT
DUKE . POWER BELEWS CREEK, NC
JOB N0:50017459 CHID: DAH
FOR - PERMANENT -IMPACT Sl, S3
DATE: OCTOBER, 2008 ENGR: RSE
DWG SIZE
DRAWING NO.
SHEET NO. REVISION
.
FILENAME:2008.10.18 = F -WATER
APPD:
ASE
ANSI
11'xlr
- 50017459
FIGURE 9

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01 Dewberr
y
Dewberry & Davis, Inc.
551 PINEY FOREST ROAD
DANVILLE, VA 24540
PHONE: [phone]
FAX: [phone]
584
T.O.B. 578.00' (IYP.)
576
APPRO'l
UNOBSTRUCTED
JURISDICTIONAL
H.W.L.=575.00'
0 10,520 CFS
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RUBBER
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560
EX. GRADE
CREEK BOTTOM
552
DATUM ELEV
545.00
0
„ Ln
0+00.00
0+40.00 0+80.00
BELEWS CREEK
T.O.B. 578.00' (TYP.)
AREA OBSTRUCTED=752(SF)
ORATION
1+20.00
0' 10' 20' 40'
SCALE: VERT. 1° = 9
HORIZ. is = 20'
a
LIJ
REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD
DESCRIPTION
Duke
Ener
orgy's
100
YR FLOOD=
88.00'
TITLE BELEWS .CREEK PERMANENT PUMPING PROJECT
DUKE POWER BELEWS CREEK, NC
DM TYPE: ACAD OFTR: ?AWC
JOB N0:60017468 CHKO: DAH
FOR PERMANENT IMPACT_S2, 64
0
ENGR:
RSE
-
DWG SIZE
DRAWING NO. SHEET NO.
REVISION
FILENAME: 2008.10.16 • P -WATER
APPO:
RSE
ANSI
tl"x17'
50017459 FIGURE 10
0
-
co
AREA
ABOVE J.H.
.L=795(SF)
—
STRUC�1-J,rf�'r"�;fFEiQ!1V
h' ^
VELOCITY C
NO: 2
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LOCAL
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n54c-.;
DAN
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LOCAL SEDIMENT
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DO
r`
t\
. -- n
CV
0+00.00
0+40.00 0+80.00
BELEWS CREEK
T.O.B. 578.00' (TYP.)
AREA OBSTRUCTED=752(SF)
ORATION
1+20.00
0' 10' 20' 40'
SCALE: VERT. 1° = 9
HORIZ. is = 20'
REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD
DESCRIPTION
Duke
Ener
orgy's
SCALE: l'=40'
DES:
RSE/DAH
TITLE BELEWS .CREEK PERMANENT PUMPING PROJECT
DUKE POWER BELEWS CREEK, NC
DM TYPE: ACAD OFTR: ?AWC
JOB N0:60017468 CHKO: DAH
FOR PERMANENT IMPACT_S2, 64
DATE:OCT08ER, 2008
ENGR:
RSE
-
DWG SIZE
DRAWING NO. SHEET NO.
REVISION
FILENAME: 2008.10.16 • P -WATER
APPO:
RSE
ANSI
tl"x17'
50017459 FIGURE 10
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SCALE: VERT. 1" = 8'
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IREVI DATE I JOB N0. I PROJECT TYPE I DESTi)
18" HDPE
NEW RIP—RAP I n 1.. -
CONCRETE
BALLAST ( P.)
MIME
720,
PUM P CAVITATION
',,,715.00' STATIN OFF—LINE
PROPOSED -
SUBMERGED
DIFFUSER
mzlgulm 1
==mail 1
Dewbeit
Dewberry & Davis, Inc.
551 PINEY FOREST A(
DANVILLE, VA24%0
PHONE: 434.797A497
FAX: [phone]
736
720
704
688
0' 10' 20' 40' f-
00 00
SCALE: VERT. 1" = 8'
HORIZ. 1" = 20' 1+20.00
IREVI DATE I JOB N0. I PROJECT TYPE I DESTi)
18" HDPE
NEW RIP—RAP I n 1.. -
CONCRETE
BALLAST ( P.)
MIME
720,
PUM P CAVITATION
',,,715.00' STATIN OFF—LINE
PROPOSED -
SUBMERGED
DIFFUSER
mzlgulm 1
==mail 1
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ui
Lo
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0
CD
1+60.00
2+00.00
2+40.00
2+80.00
3+20.00 3+60.00
APPD
DESCRIPTION
SCALE:
Duke INKI
C/Lnergy® JOB
' DATE:DGTOBER,
1•=40' DES: RSE(DAH
TYPE: ACAD DFTR: NWC
T T E BELEWS CREEK PERMANENT PUMPING PROJECT
DUKE POWER BELEWS CREEK, NC
NO:50017459 CHKD: DAH
FOR PERMANENT IMPACT 01, 02
2008 ENGR: RSE
DWG SIZE DRAWING: NO.
SHEETNO.
REVISION
FILENAME: 2008.10.18 = F -WATER ,
APPD: RSE
AN%�� 50017459
FIGURE 11