NC0004979_Issuance of Permit_20020517

1 J'
Late of North Carolina
Department of Environment • 0
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor NCDENR
William G. Ross, Jr., Secretary NORTH CAROLINA DEPARTMENT OF
Gregory J. Thorpe, Ph.D., Acting Director ENVIRONMENT AND NATURAL RESOURCES
May 17, 2002
Mr. Michael Ruhe
Duke Energy Corporation
526 South Church Street
Charlotte, North Carolina 28201-1944
Subject Issuance of NPDES Permit NC0004979
Plant Allen Steam Station
Gaston County
Dear Mr. Ruhe:
Division of Water Quality (Division) personnel have reviewed and approved your application for renewal of
the subject .permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued
pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between North Carolina and the U.S. Environmental Protection Agency dated May 9, 1994 (or as subsequently
amended).
The major change from your draft permit is that limits have been added to your coal yard sump outfall, 002A
and your power house sump outfall, 002B. Limits and monitoring are contingent upon the length and nature of the
discharge, please read Parts A. (3.) and A. (4.) for details.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to
you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of
this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh,
North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and r6ssuance of the permit. This permit does not affect the legal requirements to obtain
other permits which may be required by the Division of Water Quality or permits required by the Division of Land
Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be
required.
If you have any questions concerning this permit, please contact Natalie Sierra at telephone number (919)
733-5083, extension 551.
Sincerely,
original Signed By
David A. Goodrich
Gregory J. Thorpe, Ph.D.
cc: Central Files
Mooresville Regional Office/Water Quality Section
NPDES (L a
Point Source Compliance Enforcement Unit
Technical Assistance & Certification Unit
Aquatic Toxicology Unit
EPA Region 4
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative -Action Employer. Visrr us ON THE INTERNET @ hftp://h2o.enr.state.nc.us/NPDES

. STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations. promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
Duke Energy Corporation
is hereby authorized to discharge wastewater from a facility located at the
Plant Allen Steam Station
253 Plant Allen Road (NCSR 2525)
Belmont
Gaston County
to receiving waters designated as the Catawba and South Fork Catawba Rivers in
the Catawba River Basin.
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective July 1, 2002.
This permit and authorization to discharge shall expire at midnight on May 3.1, 2005.
Signed this day May 17, 2002.
Original Signed By
paid A Goodrwrh
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

L
Permit NC00049 f9 r
SUPPLEMENT TO PERMIT COVER SHEET
Duke Energy C(
1. Continue to discharge:
• Once through . cooling
• Operate a septic tank
domestic wastewater, s
system wastewaters, ai
waters (002)
• Coal yard sump overflc
• Miscellaneous. equipme
• Miscellaneous non -con
screen backwash (004)
From a facility located at 1
(NCSR 2525), south of Be]
is hereby authorized to:
iter (outfall 001)
A ash pond with pH adjustment and discharge
)rmwater runoff, ash sluice, water treatment
1 miscellaneous cleaning and maintenance wash
(002A) and power house sump overflow (002B)
non -contact cooling and sealing water (003)
A cooling water, vehicle washwater, and intake
Plant Allen Steam Station on Plant Allen Road
nt in Gaston County, and
2. Without adding detergents lor chemicals of any kind, discharge Asiatic
clam/ debris filter backwas4 (of the intake filter screen) (see Part A.7)
3.
Discharge from said trea ent works at the location specified on the attached
map into the Catawba River (outfalls 002, 002A, 002B and 004) and the
South Fork Catawba River (outfalls 001 and 003) which are classified Class
WS -IV and B CA and WS- waters, respectively, in the Catawba River Basin.
2

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Duke Energy Corporation
Allen Steam Station '
State Grid/Ouad:
G14NF/Belmont Permitted Flow: Not limited
Receiving Streams:
Catawba and South Fork Catawba Rivers
Stream Class:
WS-iV & B CAWS -V
Drainage Basin:
Catawba River Basin Sub -Basin: 03-08-34
Latitude (001):
35' 11' 23" N Longitude (001): 81° 00' 45" W
Latitude (002):
35' 10' 30" N Longitude (002): 81° 00' 23" W
Latitude (002A):
35' 11' 34" N Longitude (002A): 810 00' 22" W
Latitude (002B):
350 11' 36" N Longitude (002B): 81° 00' 30" W
Latitude (004):
35' 11' 35" N Longitude (004): 81° 00' 22" W
Latitude (A. Clam): 35' 11' 36" N Longitude(A. Clam):81' 00'30" W
Map not to scale
Facility
Location
North NPDES Permit No. NC0004979
Gaston County

t
Permit NC0004979
A. (1.) EFFLUENT LIMITATIOP S AND MONITORING REQUIREMENTS - FINAL
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge condenser cooling ater (CCV4 from outfall 001. Such discharges shall be limited and
monitored by the Permittee as specified bel)w:
;EFFLUENT . _ LIMI S MONITORING REQUIREMENTS
Monthly, : Daily Measurement Sample Type. Sample Location
Avera e, aximuni 'Frequency
Flow Daily Pump Logs Effluent
Temperature (°Fj?;` ' Daily Grab or Instantaneous Effluent
Notes:
1. The Regional Administrator has dei ermined pursuant to Section 316(a) of the Act that the
thermal component of the discharg assures the protection and propagation of a balanced,
indigenous population of shellfish, fish, and wildlife in and on the receiving body of water.
*Temperature shall not exceed 350 (950F) during the period October 1 -May 31 and 38.90C
(1020F) during the period June 1-Sptember 30
Chlorination of the once through cIndenser cooling water, discharged through outfall 001, is not
allowed under this permit. Should Duke Power wish to chlorinate its condenser cooling water, a
permit modification must be reque$ted and received prior to commencing chlorination.
3

i- -
t .
Permit NC0004b79
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge from outfall 002. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT CHARACTERISTICS
r LIMITS
Monthly Y`
-Avera e - ° Maxamum
MONITORING REQUIREMENTS _.
p YPe Sample L ocation '
MFre uuencent Sam le T
Flow
Weekly
Instantaneous or
estimate
Influent or Effluent
Oil and Grease
15.0 m I 20.0 m
Quarterly
Grab
Effluent
Total Suspended Solids
30.0 m I 100.0 m I
Monthly
Grab
Effluent
Biological Oxygen Demand (BODS),
20OC2
Quarterly
Grab
Effluent
Fecal Coliform
Quarterly
Grab
Effluent
Total Co ere
.0 m I
2/Month
Grab
Effluent
Total Iron2
- . 8 m I
Monthly
Grab
Effluent
Total ArsenjC2Monthly
Grab
Effluent
Total Selenium2
31.0
2/Month
Grab
Effluent
Total Phosphorus
Semi-annually
Grab
Effluent
Total Nitrogen (NO2+ NO3+ TKN
Semi -annuals
Grab
Effluent
Chronic Toxicity'
Quarterly
Grab
Effluent
Total Chromium2
Quarterly
Grab
Effluent
Phenols
Quarterly
Grab
Effluent
Na hthalene3
(/
Quarterly
Grab
Effluent
Sulfate
'` Quarterly
Grab
Effluent
Total Barium2
Quarterly
Grab
Effluent
Total Nickell
Quarterly
Grab
Effluent
Cyanide
Quarterly
Grab
Effluent
Total Zinc2
L/
Quarterly
Grab
Effluent
Total Cadmium2
Ll
Quarterly
Grab
Effluent
Ha
Monthly
Grab
Effluent
Notes:
1. Whole Effluent Toxicity shall be monitored by chronic toxicity (Ceriodaphnia) .P/F at 16%. Tests
shall be conducted in January, April, July and October (see Part A.(8.) for details)
2. Total metals are defined by 40 CFR 136. Any method specified by 40 CFR 136 is considered
acceptable for analysis.
3. Monitoring for these parameters shall continue until groundwater remediation activities are
completed.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
0

H
Eisodic Grab Effluent
Oil and Grease2
15.0 mg/1
0.0 mg/1
Eisodic Grab Effluent
Total Suspended Solids2
30.0 m.0
00.0 MCIA
Eisodic Grab Effluent
Fecal Coliform
Eisodic Grab Effluent
Total Iron3
1.0mg/1
Eisodic Grab Effluent
Notes:
1. Effluent sampling shall be conducted at a point upstream of discharge to the receiving stream.
2. Monthly average limits for total suspended
solids and oil and grease only apply if the overflow
occurs for more than 24 hours.
3. Sampling for iron is required only m
hen TSS is reported as greater than 100 mg/L.
THERE SHALL BE NO DISCHARGE O
FLOATING SOLIDS OR VISIBLE FOAM IN. OTHER THAN
TRACE AMOUNTS
`
ALL FLOWS SHALL BE REPORTED O
MONTHLY DMRS. SHOULD NO FLOW OCCUR DURING A
GIVEN MONTH, THE WORDS "NO FLOW" W" SHOULD BE CLEARLY WRITTEN ON THE FRONT OF
THE DMR. EPISODIC SAMPLING IS
9UIRED PER OCCURRANCE WHEN SUMP OVERFLOWS
OCCUR FOR LONGER THAN ONE HO
ALL SAMPLES SHALL BE OF A REPRESENTATIVE
DISCHARGE.
5

Permit NC0004979
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge from outfall 002B - Power House Sump Overflows. Such discharges shall be limited
and monitored by the Permittee as specified below -
EFFLUENT".
elow-
EFFLUENT` _ LIMITS" MONITORING REQUIREMENTS
,CHARACTERISTICS
Monthly', Daily: - _ Measurement Sample Type Sample Location
Average, Maximum Frequenc
Flow �.. Episodic Estimate Effluent'
H
I Eisodic
Grab
Effluent
Oil and Grease?:
15.0 m I 20.0 m I
Eisodic
Grab
Effluent
Total Suspended Solids2
30.0 mg/1 100.0 m I
Eisodic
Grab
Effluent
Total Co era
1.0 m I
Eisodic
Grab
Effluent
Total Iron3
1.0mg,
Eisodic
Grab
Effluent
Notes:
1. Effluent sampling shall be conducted at a point upstream of discharge to the receiving stream.
2. Monthly average limits for total suspended solids and oil and grease only apply if the overflow
occurs for more than 24 hours.
3. The limits for total copper and total iron only apply during a chemical metals cleaning.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN
TRACE AMOUNTS
ALL FLOWS SHALL BE REPORTED ON MONTHLY DMRS. SHOULD NO FLOW OCCUR DURING A
GIVEN MONTH, THE WORDS "NO FLOW" SHOULD BE CLEARLY WRITTEN ON THE FRONT OF
THE DMR. EPISODIC SAMPLING IS REQUIRED PER OCCURRANCE WHEN SUMP OVERFLOWS
OCCUR FOR LONGER THAN ONE HOUR. ALL SAMPLES SHALL BE OF A REPRESENTATIVE
DISCHARGE.
A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge from outfall 003. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS.:
Monthly `° Daily Measurement: Sample Type Sample Location
Avera e Maximum fre uenc '
Flow Weekly Estimate Effluent
Chlorination of the once through cooling water, discharged through outfall 003, is not allowed
under this permit. Should Duke Power wish to chlorinate its once through cooling water, a
permit modification must be requested and received prior to commencing chlorination.
G

Permit NC0004979 , T
A. (6.) EFFLUENT LIMITATIOS AND MONITORING REQUIREMENTS - FINAL
During the .period beginning on the effecti a date of this permit and lasting until expiration, the Permittee is
authorized to discharge once through coo Ll -
water from outfall 004. Such discharges shall be limited and
monitored by the Permittee as specified blow:
EFFLUENT .'F. LIM S MONITORING REQUIREMENTS
CHARACTERISTICS,.
Monthly;, Daily Measurement Sample Type; Sample Location
Average Maximum Fre uenc
Flow 11 Weekly Estimate Effluent
Oil and Grease 1 15.0 ma/I II 20.0 ma/I I Quarterly I Grab I Effluent
Chlorination of the once through cooling water, discharged through outfall 004, is not allowed
under this permit. Should Duke Power wish to chlorinate its condenser cooling water, a permit
modification must be requested and received prior to commencing chlorination.
A. (7.) SPECIAL CONDITION
FILTER BACKWASH
The permittee may backwash 1
needed basis. It is understood that tt
River such as Asiatic clams and light
environment, they may be discharged
Permittee may not add any deterge:
water without explicit permission o
THE DISCHARGE OF ASIATIC CLAM/DEBRIS
ie intake filter for Unit 5 condenser cooling water on an as-
s wash water will contain materials indigenous to the Catawba
ebris. As these are naturally occurring in the river
vith no adverse affects to the receiving stream. The
t, chemicals or other non -indigenous material to the wash
the Division of Water Quality.
7
1

Permit NC0004979
A. (8.) CHRONIC TOXICITY PASS/FAIL PERMIT LINHT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 16%.
The permit holder shall perform at a minimum, quarterly monitoring 'using test procedures outlined
in the "North Carolina Cerk0aphnia Chronic Effluent Bioassay Procedure," Revised February 1998,
or subsequent versions or "North Carolina Phase Il Chronic Whole Effluent Toxicity Test Procedure"
(Revised -February 1998) or subsequent versions. The tests will be performed during the months
of January, April, July and October. Effluent sampling for this testing shall be performed at the
NPDES permitted final effluent discharge below all treatment processes.
1'
H the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum,
in each of the two following months as described in "North Carolina Phase H Chronic Whole
Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the
highest concentration having no detectable impairment of reproduction or survival and the lowest
concentration that does have a detectable impairment of reproduction or survival. The definition of
"detectable impairment," collection methods, exposure regimes, and further statistical methods are
specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -
February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR -1) for the months in which tests were performed, using the
parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ
Form AT;3 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no
later than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and
all concentration/response data, and be certified by laboratory supervisor and ORC or approved
designate signature. Total residual chlorine of the effluent toxicity sample must be measured and
reported if chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT)
test form indicating the facility name, permit number, pipe number, county, and the month/year of
the report with the notation of "No Flow" in the comment area of the form. The report shall be
submitted to the Environmental Sciences Branch at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,
monitoring will be required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Water Quality -indicate potential impacts to the receiving stream, this permit may be re-
opened and modified to include alternate monitoring requirements or limits..
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival, minimum control organism reproduction, and appropriate environmental
controls, shall constitute an invalid test and will require immediate follow-up testing to be completed
no later than the last day of the month following the month of the initial monitoring.
E:.

A. (9.) BIOCIDE CONDITION
The permittee shall not use any bioc:
application. The permittee shall not
instituting use of any additional bioc
other than those previously reported
completion of Biocide Worksheet For
stream. Completion of Biocide Work
toxicity testing. Division approval is
outfall currently being tested for toxi
A. (10.) SPECIAL CONDITIC
The following special conditions are
• There shall be no discharge of po
• It has been determined from info
Allen Steam Station are equivalei
• The permittee shall report the pry
• The applicant is permitted to disc
the conditions- outlined in the 19'
1994 Allen Steam Station permit
• The permittee shall check the dill
leakage detected
• If the permittee, after monitoring
meeting the effluent limits contai
monitoring requirement be reduc
• Nothing contained in this permit
hearing it may have pursuant to
• Low volume waste is defined as f
"Low volume wastes sources inch
pollution control systems, ion exi
blowdown, laboratory and sampli
cleaning wastes, and recirculatin
wastes are not included."
,s
• -1
Permit- NCO004979
s except those approved in conjunction with the permit
the Director in writing not later thanninety (90) days prior to
used in cooling systems which may be toxic to aquatic life
the Division of Water Quality. Such notification shall include
101 and a map locating the discharge point and receiving
eet Form 101 is not necessary for those outfalls containing
it necessary for the introduction of a new biocide into an
to all outfalls regulated by NC0004979:
.hlorinated biphenyl compounds.
cation submitted that the plans and procedures in place at
to that of a BMP.
-nce of cenospheres observed in any samples.
irge chemical metal cleaning wastes to the ash basin under
Riverbend Ash Basin Equivalency Demonstration and the
)plication
I areas for leaks by a visual inspection and shall report any
)r at least six months, determines that he/she is consistently
�d herein, the permittee may. request of the Director that the
I to a lesser frequency.
iall be construed as a waiver by the permittee or any right to a
.ate or Federal laws or regulations.
.ows (as per 40 CFR 423.11(b):
le, but are not limited to: wastewaters from wet scrubber air
.ange water treatment system, water treatment evaporator
g streams, boiler blowdown, floor drains, cooling tower basin
house service water systems. Sanitary and air conditioning
0

Re: Riverbend
Subject: Re: Riverbend
Date: Thu, 9 May 2002 18:44:54 -0400
From: "Robert R Wylie" <rrwylie@duke=energy.com>
To: Natalie Sierra <[e-mail]>
CC: John R Mease <[e-mail]>,
Karrie-Jo Shell <Shell. Karrie-Jo @ epamail. epa. gov>,
"David A Saleeby" <[e-mail]>
Natalie,
Once again thanks for adding the clarification on the sump outfall.
The following are comments from Duke Energy on the attached NPDES permit:
Comments on the expirations date is the same as Plant Allen. It sounds
like your response for Plant Allen may also allow for the expiration
date for Riverbend to change to a 5 year permit.
Based on your comments that an agreement was made between DWQ and EPA
to require "total" instead of "total recoverable", I need to do some
more research on this to address this more completely. "Total" and
"total recoverable" are two different analysis. It is very helpful to
our laboratory if all of the sites are consistent, in additional to what
40 CFR 122.45 (c)) states. If you know of exactly why the EPA is
stating this, I'd like to better understand.
Outfall 001 - Footnote 1 is identified in the column heading. It may be
more appropriate for the "1" designation to be located beside the word
"Downstream" in the same column.
Outfalls 002A - Under measurement frequency the number "2" is
identified for iron. •It may be more appropriate for this to be
"episodic". Under footnote 3, since the limits do not apply unless a
chemical metal cleaning is also occuring then, it is requested -that in
this footnote "and monitoring requirements" be inserted after the words
"The limits".
Thanks,
Robert
704 382-4669
Natalie Sierra
<Natalie.Sierra@n To: Karrie-Jo Shell
cmail.net> <[e-mail]>,
Robert R Wylie
<[e-mail]>, John R Mease
05/07/02 04:54 PM <[e-mail]>
CC:
bcc:
Subject: Riverbend
All -
Attached are a copy of the pre -final permit for Riverbend and an
1 of 2 5/10/02 3:51 PM

Re: Riverbend
4 �
addendum to the Fact Sheet. Send all comments to me by Friday.
Thanks,
Natalie
(See attached file: NC0004961_fact sheet3.doc)(See attached file:
NC0004961_final.doc)(See attached file: Natalie.Sierra.vcf)
Name: NC0004961_fact sheetIdoc
NC0004961 fact sheet3.doc Type: Microsoft Word Document (application/msword)
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2 of 2 5/10/02 3:51 PM

Re: Allen pre -final
Subject: Re: Allen pre -final
Date: Thu, 9 May 2002 17:46:50 -0400
From: "Robert R Wylie" <[e-mail]>
To: Natalie Sierra <Natalie. Sierra@ ncmail.net>
CC: John R Mease <[e-mail]>,
Karrie-Jo Shell <Shell. Karrie-Jo @ epamail.epa. gov>,
"Donald L Scruggs" <[e-mail]>
Natalie,
Thanks for incorporating the clarification for the sumps outfall limits.
The following are comments from Duke Energy on the attached NPDES permit:
The expiration date is listed as January 31, 2005. If the permit is in
effect on June 1, 2002 then the actual permit is only in effect for
slightly over 2.5 years. Is there room to extend this to 5 years?
For outfall 002, as mentioned for Belews Creek, 40 CFR 122.45 (c) states
that metals are to be limited as "total recoverable" instead of "total"
unless defined otherwise by an effluent guideline. This is something
that you may also want to discuss with your laboratory certification
area.
Outfalls 002A & B - Chemical Metal Cleanings are not discharged into
these sumps. Therefore, the parameters iron and copper should be
removed.
Thanks,
Robert
[phone]
Natalie Sierra
<Natalie.Sierra@n To: Karrie-Jo Shell
cmail.net> <[e-mail]>,
Robert R Wylie
<[e-mail]>, John R Mease
05/07/02 05:14 PM <[e-mail]>
CC:
bcc:
Subject: Allen pre -final
Please review the attached and have comments to me by Friday.
-Natalie
(See attached file: NC0004979_final2001.doc)(See attached file:
Natalie.Sierra.vcf)
Name: NC0004979_final2001.doc
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Encoding: base64
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1 of 2 5/10/02 3:51 PM

Re: Allen pre -final
Subject: Re: Allen pre -final
Date: Wed, 08 May 2002 15:08:34 -0400
From: [e-mail]
To: Natalie Sierra <Natalie. Sierra@ ncmail.net>
CC: John R Mease <[e-mail]>, Robert R Wylie <[e-mail]>
Everything is OK.
Karrie-Jo Robinson -Shell, P.E.
Natalie Sierra
<Natalie.Sierra@n
Shell/R4/USEPA/US@EPA, Robert R Wylie
cmail.net>
Mease
05/07/2002 05:14
PM
To: Karrie-Jo
<[e-mail]>, John R
<[e-mail]>
CC:
Subject: Allen pre -final
Please review the attached and have comments to me by Friday.
-Natalie
(See attached file: NC0004979_final2001.doc)(See attached file:
Natalie.Sierra.vcf)
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NC0004979 fina12001.doc Type: Microsoft Word Document (application/msword)
Encoding: base64
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1 of 1 5/9/02 10:21 AM

P14nt PAlen and Riverbend NPDES Permits
Subject: Plant Allen and .Riverbend NPDES Permits
Date: Fri, 3 May 2002 14:38:14 -0400
From: "Robert R Wylie" <[e-mail]>
To: [e-mail]
CC: [e-mail]
Natalie,
Today Ms. Karrie-Jo Shell and I discussed the NPDES permit limits for the
yard sump overflow for Plant Allen and Riverbend. As discussed previously,
the overflows for these systems are very rare. The overflow discharge
pipes are in-place in order to protect the sumps' pump motors from being
exposed to water in case of a malfunction to the pumps and/or electrical
components. Systems are in-place to significantly minimize the likelihood
of an overflow occurrence. „—.__
In review of sump systems and their inputs, Karrie-Jo and I agreed that the
permit pages needed some stipulations tc, better reflact the actual...
discharge. The following is a summary of what was discussed:
Riverbend:
The limit of 1.0 mg/l in the Effluent Guidelines (40 CFR 423) for iron
and copper is listed for chemical metals cleaning, only. Therefore,
these limits should not apply unless a chemical cleaning is
occuring.
The overflows occur so infrequently that monitoring more than once ina
month is very unlikely. The daily maximum limit for TSS and Oil &
Grease is more applicable. Therefore, the monthly average limits for
TSS and Oil & Grease only apply if the overflow occurs for over 24
hours.
Plant Allen:
The limit of 50 mg/l TSS for the coal yard sump is from -40 CFR 423 also.
However, it applies to coal pile run-off during a rainstorm event. The
layout for the coal yard sump is such that an overflow would most likely
be low volume wastewater instead of coal pile run-off. Chemical metals
cleaning do not go to this sump. Therefore, it was agreed that the
limits for this sump should be 0 & G - 20 mg/l daily max. and 15 mg/1
monthly average and TSS - 100 mg/1 daily max. and 30 mg/1 monthly
average. The same rationale of exceeding a 24 hour minimum overflow
time period, as discussed for Riverbend, applies at Plant Allen for
triggering when a monthly'average limit is applicable.
Karrie-Jo stated that she will be glad to discuss the above with you.
Thanks,
Robert
704-382-4669
1 of 1 5/7/02 10:59 AD

ft Duke
Power,
A Duke EneW Company
April 11, 2002
U
APR 1 22002
DENR - WATER QUALITY I
POINT SOURCE BRANCH
Ms. Karrie-Jo Shell
United States Environmental Protection Agency
Region 4
Atlanta Federal Center
61 Forsyth Street
Atlanta, Georgia 30303-8960
Subject: Draft NPDES Permit No. NC000409 for
Plant Allen Steam Station (Outfalls 002A&B)
Draft NPDES Permit No. NC0004961 for
Riverbend Steam Station (Outfall 002A)
Duke Energy Corporation
Dear Ms. Shell:
Duke Power Company
Fossil and Hydro Generation Departmeni
P.O. Box 1006
Charlotte, NC 28201-1006
With reference to Mr. J. Scott Gordon's (EPA) letters dated March 8, 2002, Duke Energy
Corporation requests that NPDES permit limits not be required for the subject outfalls.
Duke Energy Corporation offers the following information in support of this request to
remove the proposed limits:
The subject overflow outfalls are part of the yard sump system. Normally the water that
enters the yard sumps is discharged (by pumps) to the sites' wastewater treatment system
(NPDES permitted outfall 002). The overflow outfalls exist to ensure that the pumps'
motors are protected from water damage, in case the water level increased as a result of a
system malfunction and/or a significant weather event (e.g. lightning strike). Rarely does
an overflow actually occur.
The current NPDES permit requirements to monitor and report during an overflow, were
largely based on the understanding that efforts will be made to prevent overflows from
occurring. In order to further prevent overflows from occurring both Plant Allen and
Riverbend have implemented several improvements. These improvements include:
1. Enhancements to the redundant power supply.
2. Raising the emergency overflow level in the sumps .and thus adding more
holding time. (Plant Allen)
3. Adding more level alarm points or lowering the alarm set point. This
allows the operators a quicker notice for response, in order to prevent an
overflow.

Since 1998 only two overflows have occurred at Plant Allen and one overflow has
occurred at Riverbend. In these three overflows no adverse environmental impact was
observed.
In conclusion, Duke Energy Corporation does not object to the monitoring and reporting
requirements as defined by the current NPDES permits. If a system malfunction does
occur, then the sites will respond promptly to prevent or minimize the discharge. Plant
Allen and Riverbend will also do their part to ensure their yard sump systems are
properly maintained. Therefore, it is requested that NPDES permit limits not be required
for these outfalls.
If you need additional information or have questions please contact Robert Wylie at 704-
382-4669.
Sincerely,
'/lam ,�✓t• �,,,�1 G /G,� G ---
Michael A. Ruhe, Manager
Environmental, Health and Safety
Fossil — Hydro Carolinas
cc: Natalie Sierra — North Carolina Department of Environment and Natural Resources

PLANT ALLEN - DRAFT NPDES PERMIT
Subject: PLANT ALLEN - DRAFT NPDES PERMIT
Date: Mon, 25 Mar 2002 09:54:41 -0500
From: "Robert R Wylie" <[e-mail]>
To: Natalie Sierra <[e-mail]>
CC: "Donald L Scruggs" <[e-mail]>
Natalie,
The following are Duke's comments on draft NPDES permit, from NCDENR, for
Plant Allen:
Under A(3) and A(4) (outfalls 002A and 002B), the description states
that the permittee is authorized to discharge "Once through cooling
water". It is recommended that the phrase "once through cooling water"
be deleted and simply state that the permittee is "authorized to
discharge".
In the first sentence under A(8) the word "observable" is used. We
believe "unacceptable" better reflects the toxicity test.
It would be helpful to have page numbers.
Besides the sump issue, this should close out Duke's comments for this
permit. Once I hear back from you, if still needed, I'll draft a memo on
the sump issue to the EPA.
Thanks,
Robert
1 of 1 5n102 10:59 AM

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA, GEORGIA 36303-8960
Mr. Dave Goodrich.
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raieigh, NC 27699-1617
SUBJ: Draft NPDES Permit no. NC0004979
Plant Allen Steam Station - Gaston County
Dear Mr. Goodrich:
R 1�
�2 2002
i
In accordance with the EPA/North Carolina Department of Environment and Natural
Resources (DENR) Memorandum of Agreement (MOA), we have completed our review of the
proposed National Pollutant Discharge Elimination System (NPDES) permit for the Plant Allen
Steam Station - Gaston County. The draft pet -nut and fact sheet were submitted to EPA -Region 4
via letter dated October 31, 2001 and the public notice was received via fax on February 4, 2002.
EPA provides the enclosed comments and specific objections regarding this proposed permit.
In accordance with the MOA and 40 CFR § 123.43 (c)(2)(ii), EPA requests that DENR
respond to these concerns and provide copies of any revised proposed permit and fact sheet for
EPA's review prior to final permit issuance. If you have any questions -or comments, please
contact Karrie-Jo Shell of my staff at shell..kar:rie-jo @e a.. ov or by phone at 404/562-9308.
Sincerely,
J.s �Y,
J. Scott Gordon, Chief
Permit, Grants and Technical Assistance Branch
Water Management Division
Enclosure .
cc: Mr. Michael Ruhe, Duke Energy Corp.
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable • Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 25% Postconsumer)

COMMENTS
1. The permit should include the following definition of low volume waste, which is cited at 40
CFR 423.11(b):
"Low volume wastes sources include, but are not limited to: wastewaters from wet scrubber air
pollution control systems, ion exchange water treatment system, water treatment evaporator
blowdown, laboratory and sampling streams, boiler blowdown, floor drains, cooling tower basin
cleaning wastes, and recirculating house service water systems. Sanitary and air conditioning
wastes are not included."
2. The version of the draft permit received by EPA -Region 4 did not contain Best Management
Practices or a Schedule of Compliance. Please forward these provisions.
SPECIFIC OBJECTIONS
1. Outfall 002A is an intermittent waste stream that discharges overflow from the facility's
Coal Yard Sump. This waste stream, which consists of coal pile runoff, is regulated under 40
CFR 423.12(b)(9). The draft permit currently includes a monitoring only requirement for Total
Suspended Solids. In accordance'with 40 CFR 122.44(a), the draft permit must include the
appropriate limits in accordance with effluent guidelines. Therefore, the draft permit must be
revised to include a daily maximum effluent limit for total suspended solids of 50 mg/L.
2. According to the supplemental information regarding the various waste streams provided in
the permit application, Outfall 002B consists of overflow from the Power House Sump. The
waste water in the Power House Sump contains low volume wastes such as; floor wash water,
boiler blowdown, equipment cooling water and water treatment waste. Per 40*CFR 423.12(3),
the draft permit should contain the following effluent limits for Outfall 002B:
Parameter
Total Suspended Solids, mg/L
Oil and Grease, mg/L
Daily Maxiinurn
100.0
20.0
Monthly Average
30.0
15.0

AFFIDAVIT OF INSERTION OF ADVERTISMENT
PUBLIC NOTICE STATE OF
The Gaston Gazette NORTH CAROLINA ibEPART-
ME-NT OF ENVIRONMENT
AND NATURAL RESOURCES
Division of Water Quality
Gastonia, NC
Gaston County
-Notice of,IntAnt 1
To Renew NODES"-bischa(ge
,Permits in the Catawba River
SUBJECT- Them
isn Of
,Water Quality El-nito ,renew
the' existent NPDeS •
'm'ts
for
I.
the following facilities:
Permit NC0004961 Riverbend
Steam Station Cou-nty, Gaston
I, Jennifer Painter Legal Advertising Manager of the Tife-Gastow-Guette, do cer Subbasin 30833
0enrffrNCW04979'"FkjHCy­AIL_1
that the advertisement of NCDENR .166 SteamStationCounty.Gas,,
Entitle NOTICE OF INTENT:FJVERBEND & ALLEN STEAM ton Substation'30836
PURPOSE: The facilities- listed
-above applied permit for facili-
oes located in Gaston County
discharging treated wastewater
in to the Catawb�a, and South
Fbrk Catawba Rivers In the Ca-
tawba Rivet Basin. Currently
no parameters are water quality
Measuring 9.36 Inches appeared in The Gaston Gazette, a newspaper published in limited. The thermal compo-'
neat of the discharges is sub -
Gaston County, Gastonia, NC, in issues j ject to effluent, limitation under
North Carolina Administrative
Code Section: 15A 'NCAC
is 213.0211(3)(1) which proposes
I thermal effluent jimitaklons dis-
I allowing an e.xceedelnce of 2.8
degrees C (5.04 degrees F)
ab6ve tKen.atural water tem-
REBRUARY-Z17-2021 perafur6; and in no case to ex=
ceecl',32 degrees C (89.6 de -
The pero'a holder has
Sworn to and subscribed before me this day of
requesue . con muance o a
316(a) temperature. variance,
,.which allows for�an'efffbent lim-
itation of 36 degrees C'(95 de-
Jennifer Painter grqes F). On the basis on North
Carolina Administhative'CodE
S, , ,
- 'f'NCAC
Legal Advertising Managei ection! 15A
�213.0208(2)(B.b) (and dther law.
1ful standards and regulations)
the North Carolina Division o
2002 Vater Quality proposes to con
'I mnue the 316 (a) variance it
-conjunction with the renewal o
the permits.This diSha,,e M
!
9
r 1 n thiel
,affect future alloc- ons
portion of the rece!�Fl,
stream.
etww ON: A
INFOR MATI,
-existing NPI
Notary Public mari showingocation
of the
its and
o
My commission expires May 25, 2003
writing or caning
MS. Christie -Jackson
NC 0ENR-DWQ-NPDES Unit
1617 Mail Service Center,
Raleigh, North Carolin,
276994617 --
'Telephone number: (91
733-5083, ext. 551
The existing permits are on fil,
at the Division of -Water Quality
Archdale Building 512 Nortl
Salisbury Street- (Room 925)
Raleigh, North caroliriii The,
may be inspect6d duiing nor
Mal office hours.. Copies of IN
,'information on file are, avaiilabl(
upon request and payment o
the costs of copying- ) .
1 C-Februrary 21, •2002

Re: Plant Allen
Subject: Re: Plant Allen
Date: Thu, 17 Jan 2002 15:56:41 -0500
From: "John R Mease" <[e-mail]>
To: Natalie Sierra <[e-mail]>
CC: "Donald L Scruggs" <[e-mail]>,
"Robert R Wylie" <[e-mail]>
Natalie, the estimated volume of the basin is 387 MG. The average discharge
is 20.5 MGD (this is from the EPA 2C long term average in the
application). This would give a theoretical retention of roughly 19 days
for Allen's ash basin. -If you need more information, please call me at
[phone].
Natalie Sierra
<Natalie.Sierra@n To: John R Mease
<[e-mail]>
cmail.net> cc:
bcc:
01/16/02 03:17 PM Subject: Plant Allen
John -
What is the detention time of the ash basin at Plant Allen?
Thanks,
Natalie
(See attached file: Natalie.Sierra.vcf)
Name: Natalie.Sierra.vcf
Natalie. Sierra. vcf Type: VCard (text/x-vcard)
Encoding: base64
1 of 1 1/17/02 4:20 PM

Gastonia, NC
Gaston County
I, SHEILA RANBURGER Legal Advertising Manager of the The Gaston Gaze
do certify that the advertisement of NCDENR
Entitle WASTEWATER PERMITS
Measuring 10.19 Inches appeared in The Gaston GV
wspaper publ
Gaston County, Gastonia, NC, in issues
R
DEC I
DECEMBER -17,2001'
DWQ
Sworn to and subscribed before me this / fl
My commission expires MU 25, 2003
OL ,/ ---7
) 411721
SHEILA RANBURGER
Legal Advertising Manal
ra . • {�� � ! .II � 11
Notary Public
North Carolina Environmental
Management Commission pro-
poses to issue a National Pollu-
tant Discharge Elimination Sys-
tem (NPDES) wastewater dis-
charge permit to the person(s)
Fisted below effective 45 days
from the publish date of this no -
rice.
Written comments regarding
the proposed permit will be ac-
cepted until 3o days after the'
publish date of this notice. All
comments received prior to that
date are considered in the final
determinations regarding the
proposed permit. The Director
of the NC Division of Water
Quality may decide to hold a
public meeting for the proposed
permit should the Division re-
ceive a significant degree of
public interest.
Copies of the draft permit and
other supporting information on
file used to determine condi-
tions present in the draft permit
are available upon request and
payment of the costs of repro-
duction. Mail comments and/or
requests for information to the
NC Division of Water Quality at
the above address or call Ms.
Christie Jackson at
[phone] extension 538.
Please include the NPDES per-
mit number (attached) in ani
communication. Interested Per-
sons may also frfsit the Divisior
of Water b Jity at 512 N''
Salisbury Street, Raleigh, W
27604-1148 between the hour:
of 8:00 a.m. and 5:00 p.m. tc
review information on file.
NPDES - Permit Numbe
NC00o4979 Duke Energy -Cor
poration - Allen Steam -Station
13339, Hagers Ferry Road
I Huntersville, NC 28078 has'ap
plied fora permit renewal for E
facility located in Gaston-Coun•
ty, _ _ _ dischargin treater
Wastewater into -Catawba- and
South Fork Catawba Rivers in
the Catawba River Basin. Cur-
rently selenium and -iron are
water quality limited. This dis-
charge may affect future alloca-
1 tions in -this portion of thej re -
ceiving.stream.----- -----
NPDES Permit Number
NC0021181, BELMONT, CITY
OF WWTP, PO Box 431, Bel-
mont, NC 28012 has applied
for a permit renewal for facili-
ty located in Gaston County
discharging treated wastev(ater
into CATAWBA RIVER In -the
CATAWBA River Basin. Cur-
rently cyanide are water quality
limited. This discharge may af-
fect future allocations in this
portion of the receiving stream.
1 C -December 17, 2001
PUBLIC NUI IL&
STATE OF NORTH
CARO
ENVIRONMENTAL
MANAGEMENT COMMIS -
S 1 O N
/ NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
AFFIDAVIT OF INSERTION OF ADVERTISMETQ
NOTIFICATION OF INTENT
A NPDES
TO ISSUE
WASTEWATER PERMIT
The Gaston Gazette
On the basis of through staff
review and application of NC
General Statute 143.21, Public
!`
law 92-500 and other, lawful
standards and regulations, the
Gastonia, NC
Gaston County
I, SHEILA RANBURGER Legal Advertising Manager of the The Gaston Gaze
do certify that the advertisement of NCDENR
Entitle WASTEWATER PERMITS
Measuring 10.19 Inches appeared in The Gaston GV
wspaper publ
Gaston County, Gastonia, NC, in issues
R
DEC I
DECEMBER -17,2001'
DWQ
Sworn to and subscribed before me this / fl
My commission expires MU 25, 2003
OL ,/ ---7
) 411721
SHEILA RANBURGER
Legal Advertising Manal
ra . • {�� � ! .II � 11
Notary Public
North Carolina Environmental
Management Commission pro-
poses to issue a National Pollu-
tant Discharge Elimination Sys-
tem (NPDES) wastewater dis-
charge permit to the person(s)
Fisted below effective 45 days
from the publish date of this no -
rice.
Written comments regarding
the proposed permit will be ac-
cepted until 3o days after the'
publish date of this notice. All
comments received prior to that
date are considered in the final
determinations regarding the
proposed permit. The Director
of the NC Division of Water
Quality may decide to hold a
public meeting for the proposed
permit should the Division re-
ceive a significant degree of
public interest.
Copies of the draft permit and
other supporting information on
file used to determine condi-
tions present in the draft permit
are available upon request and
payment of the costs of repro-
duction. Mail comments and/or
requests for information to the
NC Division of Water Quality at
the above address or call Ms.
Christie Jackson at
[phone] extension 538.
Please include the NPDES per-
mit number (attached) in ani
communication. Interested Per-
sons may also frfsit the Divisior
of Water b Jity at 512 N''
Salisbury Street, Raleigh, W
27604-1148 between the hour:
of 8:00 a.m. and 5:00 p.m. tc
review information on file.
NPDES - Permit Numbe
NC00o4979 Duke Energy -Cor
poration - Allen Steam -Station
13339, Hagers Ferry Road
I Huntersville, NC 28078 has'ap
plied fora permit renewal for E
facility located in Gaston-Coun•
ty, _ _ _ dischargin treater
Wastewater into -Catawba- and
South Fork Catawba Rivers in
the Catawba River Basin. Cur-
rently selenium and -iron are
water quality limited. This dis-
charge may affect future alloca-
1 tions in -this portion of thej re -
ceiving.stream.----- -----
NPDES Permit Number
NC0021181, BELMONT, CITY
OF WWTP, PO Box 431, Bel-
mont, NC 28012 has applied
for a permit renewal for facili-
ty located in Gaston County
discharging treated wastev(ater
into CATAWBA RIVER In -the
CATAWBA River Basin. Cur-
rently cyanide are water quality
limited. This discharge may af-
fect future allocations in this
portion of the receiving stream.
1 C -December 17, 2001

/% f ;
AFFIDAVIT OF INSERTION OF ADVERTISMEN `
The Gaston Gazette
Gastonia, NC
Gaston County
I, SHEILA RANBURGER Legal Advertising Manager of the The Gaston
do certify that the advertisement of NCDENR
Entitle PERMIT — NC 0004979
Measuring 8.74 Inches appeared in The Gaston Gazette, a newspaper published
Gaston County, Gastonia, NC, in issues
NOVEMBER 6, 2001
SHEILA RANBURGER
Legal Advertising Manage
r:
Sworn to and subscribed before me this day of ,' ,2001 k
Notary Public
My commission expires May 25, 2003
r coMM
dr

Duke
hEnergy®
December 12, 2001
Ms. Natalie Sierra
NC DENRMIater Quality/NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Allen Steam Station, Gaston County
NPDES Permit Number NC#0004979
File: AS -006121
Certified: 7000 1670 0001 5505 9631
Dear Ms. Sierra:
Duke Energy Corporation
EH&S Services
13339 Hagers Ferry Road
Huntersville, NQ 28078
Below are comments and requested revisions to the draft NPDES permit for Plant Allen.
Supplement to Permit Cover Sheet
1. Continue to discharge:
• Change second bullet:
Operate a septic tank/sand filter and ash pond with pH adjustment and discharge
domestic wastewater, stormwater runoff, ash sluice, water treatment system
wastewater, and miscellaneous cleaning and maintenance wash waters (002).
To:.. .
Operate a septic tank and ash pond with pH adjustment and discharge domestic
wastewater, stormwater runoff, ash sluice, water treatment system wastewater,
discharge from groundwater remediation system, and miscellaneous cleaning and
maintenance wash waters (002).
• Change fourth bullet:
Miscellaneous equipment cooling and sealing water (003).
To: r
Miscellaneous equipment non -contact cooling and sealing water (003).
• Change fifth bullet:
Miscellaneous non -contact cooling water, vehicle washwater, intake screen and filter
backwash (004).
To:
Miscellaneous non -contact cooling water, vehicle washwater and intake screen
backwash (004).
ff'
2. Since item number three is beingincorporated in number 1, delete item number three and
renumber item number four to number three.
.q
D
CY ;�
cn
CU
U_J
Y
o
• Change second bullet:
Operate a septic tank/sand filter and ash pond with pH adjustment and discharge
domestic wastewater, stormwater runoff, ash sluice, water treatment system
wastewater, and miscellaneous cleaning and maintenance wash waters (002).
To:.. .
Operate a septic tank and ash pond with pH adjustment and discharge domestic
wastewater, stormwater runoff, ash sluice, water treatment system wastewater,
discharge from groundwater remediation system, and miscellaneous cleaning and
maintenance wash waters (002).
• Change fourth bullet:
Miscellaneous equipment cooling and sealing water (003).
To: r
Miscellaneous equipment non -contact cooling and sealing water (003).
• Change fifth bullet:
Miscellaneous non -contact cooling water, vehicle washwater, intake screen and filter
backwash (004).
To:
Miscellaneous non -contact cooling water, vehicle washwater and intake screen
backwash (004).
ff'
2. Since item number three is beingincorporated in number 1, delete item number three and
renumber item number four to number three.

A. (2.) Effluent Limitations and Monitorinq Requirements
1. Delete footnote 1 the sand filtration unit has been taken out of service. Footnote 2 and 3
should now be changed to 1 and 2, respectively. mss'
2. Effluent Characteristics:
• Delete the footnote reference from Fecal Coliform
• Change the footnote from 3 to 1 for Toxicity
• Change the footnote from 3 to 2 for Phenol
• Change the footnote from 3 to 2 for Naphthalene.
3. Monitoring Requirements - Sample Type:
• Due to the large size and the consistency of the ash basin at Plant Allen, Duke Power
�� requests that all sample type be "Grab" except for flow.
awl ilk •�r' The Steam Electric Effluent Guidelines (40 CFR 423) restrict iron and copper, during a
chemical metals cleaning, to 1.0. It is requested that the iron and copper limitation for
-� -,7�'outfall #002 only apply during chemical metals cleaning. In addition, Duke Power �I v C�
requests intake credit (40 CFR 122.45 (g)) for iron due to the high level of iron in the i' Ida
source water. See attach sheet for iron levels from outfall #002 as compare to the intake
0 1 over the past three years.
• The results of the EPA 2C sampling for cadmium (0.52 mg/L) and cyanide (0.0025�g/L)
'at outfall #002 were statistically the same as the results for the intake of <0.5 mg/L for
cadmium and <0.002 ug/L for cyanide. The following are the sampling results from the
Com'1994 NPDES permit renewal. The results were cadmium (<0.01 ug/L) and cyanide �Fn�..` -Y
Inc lk
�
(<0.01 mg/L) at outfall #002 and cadmium (0.15ug/L) and cyanide (<0.01) at the intake. 7
Therefore Duke Power requests that cadmium and cyanide monitoring requirement at
1, v 1 outfall #002 be dropped.
4. Change.
J, # _r.._ The pH shall not be less than 6.0 standards units nor greater than 9.0 standard units.
G 'To:
_ The pH shall not be less than 6.0 standards units nor greater than 9.0 standard units and' i
,shall be monitored monthly at the effluent by grab sample. V%
Reduce the measurement frequency for total arsenic from monthly to quarterly.
A. (3.) Effluent Limitations and Monitorinq Requirements i
1. In the outfall description change:
outfall 002A — Yard Sump Overflows.
To:
outfall 002A — Coal Yard Sump Overflows.
2. Monitoring Requirements - Sample Type:
• Change sample type for iron from composite to grab (per letter dated 5/15/00 from
NCDWQ). f/!
A. (4.) Effluent Limitations and Monitorinq Requirements
1: Effluent Characteristics: I 1
Delete Fecal Coliform monitoring (per letter dated 4/25/01 from NCDWQ)
2.�.Whitoring Requirements — Sample Type:
1 • Change sample type for iron from composite to grab (per letter dated 4/25/01 from
NCDWQ). �li

t

Y Y ,
A. (5.) & (6.) Effluent Limitations and Monitoring Requirements
1. Both outfalls are non -contact cooling water with no chemical additions to the waste stream.
The results of the EPA 2C sampling of the intake as compared/to both outfalls 003 and 004��
demonstrated there was no iron or sulfate being added to the,, astestreams; therefore Duke
Power requests that iron and sulfate be dropped. fir,
A. (9.) Biocide Condition
1. Add the following to the end of the condition:
Completion of Biocide Worksheet 101 is not necessary for those outfalls containing toxicity
testing. Division approval is not necessary for the introduction of a new biocide into an outfall
currently being tested for toxicity..,'
If you have questions or concerns, please call John Mease at [phone].
Sincerely,
0/4 -wt, OvL-
Michael A. Ruhe
Manager, Water Compliance
cc: Caroline Ejimofor, EPA Region 4