NC0004961_Issuance of Permit_20050214

oFWArFR
�r NC ENR
d �
Mr. Michael A. Ruhe, Manager
Environmental Support,
Duke Power, P.O. Box 1006
Charlotte, North Carolina 28201
Dear Mr. Ruhe.
Michael F Easley
Governor
William G Ross, Jr, Secretary
North Carolina Department of Environment and Natural Resources
Alan W Klimek, P E , Director
Division of Water Quality
February 14, 2005
Subject. Issuance of NPDES Permit NC0004961
Riverbend Steam Station
Gaston County
Division personnel have reviewed and approved your application for renewal of the subject pernut.
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 US. Environmental Protection Agency dated May 9, 1994 (or as subsequently amended).
This final permit includes following major changes from the draft permit sent to you on December 8, 2004:
• Special Condition A- (10.) requiring that permittee shall comply with the Cooling Water Intake Structure Rule
per 40 CFR 125.95. was added to the permit.
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 reissuance 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 Sergei Chernikov at telephone number
[phone], extension 594.
Sincerely,
ORIGINALSIGNED BY
SI.ISA
ON
Alan W. Klimek, P.E.
cc: Central Files
NPDES Files
Mooresville Regional Office /Surface Water Protection
Aquatic Toxicology Unit
Mr. Roosevelt Childress, EPA Region IV
DEH
N C Division of Water Quality / NPDES Unit Phone [phone]
1617 Mad Service Center, Raleigh, NC 27699-1617 fax [phone]
n eine l o�te nc us---DENus�mer Service Center 1-800-6'237748

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
Riverbend Steam Station
Mount Holly
Gaston County
to receiving waters designated as the Catawba River 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 March 1, 2005.
This permit and authorization to discharge shall expire at midnight on February 28, 2010.
Signed this day February 14, 2005.
ORIGINAL. SIGNED By
SUSAN A. WILSON
Alan Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0004961
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under
the permit conditions, requirements, terms, and provisions included herein.
Duke Energy Corporation is hereby authorized to:
Continue to discharge:
• Once through cooling water (outfall 001) consisting of intake screen
backwash and water from the plant chiller system, turbine lube oil coolers,
condensate coolers, main turbine steam condensers and the intake tunnel
dewatering sump
• Ash basin discharge (outfall 002) consisting of induced draft fan and
preheater bearing cooling water, stormwater from roof drains and paving,
treated groundwater, track hopper sump (groundwater), coal pile runoff,
laboratory drain and chemical makeup tanks and drums rinsate wastes,
ash transport water, general plant/railer sanitary wastewater, metal
cleaning waste, chemical metal cleaning waste, combustion turbine cooling
water discharges, turbine and boiler rooms sumps, vehicle rinse water,
and stormwater from pond areas and upgradient watershed
• Yard sump overflow (002A)
From a facility located at Riverbend Steam Station, Mount Holly in Gaston
County, and
2. Discharge wastewater from said treatment works at the location specified on
the attached map into the Catawba River, which is classified WS -1V and B -CA
waters in the Catawba River Basin.
2

Duke Energy Corporation
Riverbend Steam Station
State Grid/Quad- F15SW/Mt Island Lake, NC
Receiving Streams:Catawba River
Sub -Bann:
03-08=33
Stream Class:
WS -TV & B -CA
Permitted Flow-
Not limited
Drainage Basin:
Catawba River Bann
Latitude (001):
35° 21' 28" N
Longitude (001)•
80° 58 12" W
Latitude (002).
35° 22' 06" N
Longitude (002):
80'57'31" W
Latitude (002A)•
35° 21' 51" N
Longitude (002A)
80° 58' 1 1" W
Map not to scale
Facility
Location
!s
NorthNPDES Permit No. NC1004161
Gaston Count

1 d ,
Pernut NC0004961
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Final
During the period beginning on the effective date of this perrrut and lastinguntil expiration, the Pe=ttee is
authorized to discharge once through cooling water and intake screen backwash from outfall 001 Such
discharges shall be limited and monitored by the Perrruttee as specified below
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly Daily
Average Maximum
Measurement Sample Type Sample Location'
Frequency
Flow
Daily Pump Logs Influent or Effluent
Temperature (OF)
95 0 (35-C)
Daily Grab Effluent
Temperature ff)2
89 6 (32-C)
Daily Grab Downstream
Temperature ('F)3
Daily Grab Effluent
Notes
1 Downstream sampling point downstream at Mountain Island Lake
2 The ambient temperature shall not exceed 89 60F (32 OOC) and is defined as the daily average downstream
water temperature When the Riverbend Station effluent temperature is recorded below 89 60F (32 OOC), as
a daily average, then monitoring and reporting' of'the downstream water temperature is not required In
cases where the Permittee experiences equipment problems and is unable to obtain daily temperatures from
the existing temperature monitoring system, the temperature monitoring must be reestablished within five
working days
3 This temperature requirement is in effect when only units with a shared control system are
operating.
1 If the daily average intake temperature is below 36 50F (2 50C), the daily average effluent temperature
shall not exceed 50 OOF (100C), and
2 If the daily average intake temperature ranges from 36 50F (2 50C) to 55 OOF (12 SOC), the daily average
effluent temperature shall not exceed two times the intake temperature (OF) minus 23
The Regional Administrator has determined pursuant to Section 316(a) of the Act that the
thermal component of the discharge assures the protection and propagation of a balanced,
indigenous population of shellfish, fish, and wildlife in and on the receiving body of water.
Chlorination of the once through condenser 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 requested and received prior to commencing
chlorination.
There shall be no discharge of floating solids or visible foam in other than trace amounts

Permit NC0004961
A. (2.) EFFLUENT LINIITATIONS AND MONITORING REgUIREMENTS — 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 CHARACTEF(ISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly Dally Measurement Sample Type Sample Location
Average Maximum Frequency
Flow
Weekly
Pump logs or
estimate
Influent or Effluent
Total Suspended Solids'
23 0 m /L
75 0 m /L
2/month
Grab
Effluent
Oil and Grease
11 0 m /L
15 0 m /L
Semi-annually
Grab
Effluent
Total Cop ere
10 m L
1) m L
Quarterly
Grab
Effluent
Total Iron2
1 0 m /L
1 m L
Quarterly
Grab
Effluent
Total ArseniC2
Quarterly
Grab
Effluent
Total Selenium2
Quarterly
Grab
Effluent
Total Phosphorus
Semi-annually
Grab
Effluent
Total Nitrogen (NO2+ NO3 + TKN)
Semi-annually
Grab
Effluent
H3
Monthly
Grab
Effluent
Chronic Toxiclty4
Quarterly
Grab
Effluent
Notes -
1. Monthly average of 43 mg/L is permitted provided that the Permittee can satisfactorily
demonstrate that the difference between 23 mg/L and 43 mg/L is a result of the concentration of
total suspended solids in the intake water
2. Total metals are defined by 40 CFR 136. Any method specified by 40 CFR 136 is considered
acceptable for analysis
3. The pH shall not be less than 6.0 standard units nor greater than 9 0 standard units
4. Whole Effluent Toxicity shall be monitored by chronic toxicity (Cenodaphnia) P/F at 10% Tests
shall be conducted in January, April, July and October (see Part A (4 ) for details)
The metal cleaning waste, coal pile runoff, ash transport water, domestic wastewater,
and low volume waste shall be discharged into the ash settling pond.
No chemicals, cleaners, or other additives may be present in the vehicle wash water
to be discharged from this outfall.
There shall be no discharge of floating solids or visible foam in other than trace
amounts.

Permit NC0004961
A. (3.) 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 002A Yard Sump Overflows Such discharges shall be limited and
monitored by the Permittee as specified below
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly Daily
Average Maximum
Measurement Sample Type Sample Location
Frequency
Flow
Episodic
Estimate
Effluent'
pH
Eisodic
Grab
Effluent
Total Suspended Solids2
23 0 m /L
75 0 m /L
Episodic
Grab
Effluent
Oil and Grease2
110 m /L
15 0 m /L
Eisodic
Grab
Effluent
Fecal Coliform
Eisodic
Grab
Effluent
Total Copper3
1 0 m /L
10 m /L
Episodic
Grab
Effluent
Total Iron3
10 m /L
10 m /L
2
Grab
Effluent
Notes:
1. Effluent sampling shall be conducted at a point upstream of discharge to the receiving stream.
2. The monthly average limits for total suspended solids and oil and grease are applicable only 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 WRITEN 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.

Permit NC0004961
A. (4.) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 10%.
The permit holder shall perform at a minimum, quarterhi monitoring using test procedures outlined
in the "North Carolina Cenodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998,
or subsequent versions or "North Carolina Phase II 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.
If 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 Section
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 chenucal/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.

Permit NC0004961
A. (5.) BIOCIDE CONDITION
The permittee shall not use any biocides except those approved in conjunction with the permit
application. The permittee shall notify the Director in writing not later than ninety (90) days prior to
instituting use of nay additional biocide used in cooling systems which may be toxic to aquatic life
other than those previously reported to the Division of Water Quality. Such notification shall include
completion of Biocide Worksheet From 101 and a map locating the discharge point and receiving
stream. Completion of a Biocide Worksheet 101 is not necessary for the introduction of a new biocide
into an outfall currently being tested for toxicity.
A. (6.) SPECIAL CONDITIONS
The following special conditions are applicable to all outfalls regulated by NC0004961:
• There shall be no discharge of polychlorinated biphenyl compounds.
• The Permittee shall check the diked areas for leaks by a visual inspection and shall report any
leakage detected
• If the Permittee, after monitoring for at least sic months, determines that he/she is consistently
meeting the effluent limits contained herein, the Permittee may request of the Director that the
monitoring requirement be reduced to a lesser frequency.
• Nothing contained in this permit shall be construed as a waiver by the Permittee or any right to a
hearing it may have pursuant to State or Federal laws or regulations.
• Discharge of any product registered under the Federal Insecticide, Fungicide, and Rodenticide Act
to any waste stream which may ultimately be released to lakes, rivers, streams or other wasters
of the United States is prohibited unless specifically authorized elsewhere in this permit.
Discharge of chlorine from the use of chlorine gas, sodium hypochlorite, or other similar
chlorination compounds for disinfection in the plant potable and service water systems and in
sewage treatment is authorized. Use of restricted use pesticides for lake management purposes
by applicators licensed by the N.C. Pesticide Board is allowed.
• The Permittee shall report all visible discharges of floating materials, such as an oil sheen, to the
Director when submitting DMRs
A. (7.) PERMIT TERMS
The following special conditions are applicable to all outfalls regulated by NC0004961:
The term "low volume waste sources" means, taken collectively as if from one source, wastewater
from all sources except those for which specific limitations are otherwise established in this part.
Low volume wastewater sources include, but are not limited to: wastewater 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 service water systems. Sanitary and air conditioning wastes
are not included.
The term "metal cleaning waste" means any wastewater resulting from cleaning (with or without
chemical cleaning compounds) any metal process equipment including, but not limited to, boiler
tube cleaning, boiler fireside cleaning, and air preheater cleaning. Chemical metal cleaning will
be conducted according to Duke Power approved equivalency demonstration.
It has been determined from information submitted that the plans and procedures in place at
Riverbend Steam Station are equivalent to that of a BMP.
A. (8.) SPECIAL CONDITION FOR DISCHARGE OF WASTEWATER
Beginning on the effective date of this permit and lasting until expiration, there shall be no discharge
of plant wastewater to the ash pond unless the Permittee provides and maintains at all times a
minimum free water volume (between the top of the sediment level and the minimum discharge
elevation) equivalent to the sum of the maximum 24-hour plant discharges plus all direct rainfall and
all runoff flows to the pond resulting from a 10 -year, 24-hour rainfall event, when using a runoff
coefficient of 1.0. During the term of the permit, the Permittee shall remove settled material from the
ponds or otherwise enlarge the available storage capacities in order to maintain the required
minimum volumes at all times. The Permittee shall determine and report to the permit issuing
authority the following on an annual basis:
1) the actual free water volume of the ash pond,
7

Permit NC0004961
2) physical measurements of the dimensions of the free water volume in sufficient detail to allow
validation of the calculated volume, and
3) a certification that the required volume is available with adequate safety factor to include all
solids expected to be deposited in the pond for the following year.
Present information indicates a needed volume of 86.2 acre-feet in addition to solids that Will be
deposited to the ash pond; any change to plant operations affecting such certification shall be
reported to the Director within five days.
NOTE: In the event that adequate volume has been certified to exist for the term of the permit,
periodic certification is not needed.
A.(9.) SPECIAL CONDITON — BOILER CLEANING WASTES
It has been demonstrated that under certain conditions it is possible to reduce the concentration of
metals in boiler cleaning wastes in the range of 92-99+ percent by treatment in ash ponds. Because
of dilution problems and the existence of boundary interface layers at the extremities of the plume, it
is difficult to prove beyond doubt that the quantity of iron and copper discharge will always be less
than one milligram per liter times the flow of metal cleaning when treated in this manner.
The application of physical/ chemical methods of treating wastewater has also been demonstrated to
be effective in the treatment of metal cleaning wastes. However, the effectiveness of ash pond
treatment should be considered in relation to the small differences in effluent quality realized
between the two methods.
It has been demonstrated that the presence of ions of copper, iron, nickel and zinc in the ash pond
waters was not measurably increased during the ash pond equivalency demonstration oat the Duke
Power Company's Riverbend Steam Station. Therefore, when the following conditions are
implemented during metal cleaning procedures, effective treatment for metals can be obtained at this
facility:
1. Large ash basin providing potential reaction volumes in the ratio of 100 to 1.
2. Well-defined shallow ash delta near the ash basin influent.
3. Ash pond pHs of no less than 6.5 prior to metal cleaning waste addition.
4. Four days retention time in ahs pond with effluent stopped.
5. Boiler volume less than 86,000 gallons.
6. Chemicals for cleaning to include only on -2 or more of the following:
a. Copper removal step- sodium bromate (NaBr02), ammonium carbonate ((NH4)2CO3-H20,
and ammonium hydroxide (NH40H) .
b. Iron removal step - hydrochloric acid (HCl), ammonium bifluonde ((NH4)HF2 and
proprietary inhibitors.
7. Maximum dilution of wastewater before entering ash pond: 6 to 1.
8. If monitoring of basin effluents (as required by the permit) after treatment of metal cleaning
wastes reveals discharges outside the limits of the permit, Permittee will:
1) re -close the basin discharge,
2) conduct such in -basin sampling as necessary to determine the cause of
nonconformance,
3) take appropriate corrective actions, and
4) file a report with EPA including all pertinent data.
A.(10.) SPECIAL CONDITON - SECTION 316 (B) OF CWA
The pernuttee shall comply with the Cooling Water Intake Structure Rule per 40 CFR 125.95.

imap //sergei chem1kov%40dwq deny ncmail [e-mail] 143/£
Subject: Re: question re Riverbend Steam Station (Duke)
From: [e-mail]
Date: Thu, 10 Feb 2005 08:18:57 -0500
To: Sergei Chemikov <[e-mail]>
I have no comments on the application.
By the way, have you received any Proposal of Information Collection
from any NC power plants? If so, please forward them to me as you get
them. I will be working with a biologist to provide comments.
Karrie-Jo Robinson -Shell, P.E.
Sergei Cherni.kov
<sergei.cherniko
02/08/2005 02:56
PM
To
Karrie-Jo Shell/R4/USEPA/US9EPA
cc
Subject
Re: question re Riverbend Steam
Station (Duke)
Karrie-Jo,
When do you think you will be able to review the application?
Thank you'
Sergei
[e-mail] wrote:
Thanks for making the change. I did get the application.
Karrie-Jo Robinson -Shell, P.E.
Sergei Chernikov
<sergei.cherniko
[e-mail]>
02/07/2005 10:19
►M
Karrie-Jo Shell/R4/USEPA/US@EPA
To
cc
Subject
1 of 5 2/10/2005 8 42 AM

unap://sergei chermkov%40dwq denr ncmail net@curs ncmail het 143/f
Re: question re Riverbend Steam
Station (Duke)
Kerrie -Jo,
I have inserted the language into the permit. Did you receive the
application package? Please let me know if you have any other comments.
If you you don't have other comments, please send me a no comments
e-mail/letter.
Thank you!
Sergei
[e-mail] wrote:
Per our conversation, please include language in the permit
requiring
the permittee to comply with the Cooling Water Intake Structure
Rule
regulations per 40 CFR 125.95. Also, please send me a copy of
the
permit application at your earliest convenience.
Thanks,
Karrie-Jo Robinson -Shell, P.E.
Sergei Chernikov
<sergei.cherniko
I
[e-mail]>
To
Karrie-Jo
Shell/R4/USEPA/US@EPA
1 01/27/2005 02:34
cc
PM
Subject
Re: question re Riverbend
Steam
I
Station (Duke)
of 5 2/10/2005 8 42 AM

unap //sergei chermkov%40dwq.denr.ncmai1 [e-mail] net 143/f
Subject: RIVERBEND NPDES PERMIT
From: Robert R Wylie <nwyl>[e-mail]>
Date: Thu, 6 Jan 2005 17:06:41 -0500
To: [e-mail]
CC: Robert S Jones <rsjones [e-mail]>, Gregory P Phillips <[e-mail]>
Sergei,
Duke Power representatives have reviewed the draft Riverbend Steam Station
NPDES permit. This permit is acceptable to Duke Power.
If you have any questions feel free to call me.
Thanks,
Robert Wylie
Environment, Health and Safety
Office Phone Number 704 382-4669
Fax Number 704 382-9840
Mail Code: EC11E
e-mail address: [e-mail]
1 of 1 1/7/2005 8 32 AM

mnap //sergei chermkov%40dwq deer ncmail net@cros ncmail net.143/f .
Subject: Draft Permit Reviews (3)
From: John Giorgino <[e-mail]>
Date: Wed, 22 Dec 2004 10.42.31 -0500
To: sergei chermkov <[e-mail]>
Sergei, I have reviewed the following:
NC0006564- Baxter Healthcare
NC0004961- Riverbend Steam Station
NC0004812- Pharr Yarns
I have no comments concerning the tox sections. Thanks for forwarding them.
1 of 1 1/5/2005 9 10 AM

AFFIDAVIT OF INSERTION OF
ADVERTISEMENT
The Gaston Gazette
Gastonia, NC
Gaston County
I, Linda Seiboth Legal Advertising Clerk of The Gaston Gazette, do certify that the
advertisement of
PUBLIC NOTICE
NPDES WASTEWATER PERMIT
Measuring 14.19 inches appeared in The Gaston Gazette, a newspaper published in
Gaston County, Gastonia, NC, in issues
DECEMBER 10, 2004
r�n
Sworn to and subscribed before me this day of
Linda Seiboth
Legal Advertising
)_), etoibo_
, 2004
CIO �, n Gu 44c,
Carla Noms Potter, Notary Public
My Commission Expires September 14, 2008
Duke Power, PO Bo.
1006, Charlotte, N C
28201, Gaston County, ha:
applied for renewal of d:
NPDES discharge perms
for Riverbend Steam Sta
bon (number NC0004961
discharging to the Catawba
River in the Catawba Rive
Basin This facility operate;
three outfalls, 001
(once -through non -contact
cooling water), 002 (ash
settling pond discharge),
and 002A (yard sump over-
flows) Currently oil and
grease, total suspended
solids, copper and iron are
water quality limited This
discharge may affect future
allocations in this portion of
the Catawba River Basin
The City G nia (PO
Box 1748, Gastonia, N C
28053) has applied for re-
newal of permit
NCO040070 for its WTP
This permitted facility dis-
charges filter -backwash
wastewater to an unnamed
tributary to Long Creek in
the Catawba River Basin
Currently total residual
chlorine is water quality
limited This discharge may
affect future allocations in
this portion oLopg Creek
The Town of Spencer
Mountam, NCSR 2003,
Spencer Mountain, North
Carolina has applied for
NPDES permit NCO066141
for its WWTP in Gaston
County This permitted fa-
cility discharges treated
wastewater to the South
Fork Catawba River in the
Catawba River Basin Cur-
rently total residual chlorine
is water quality limited This
discharge may affect future
allocations in this portion of
the watershed
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__ _ U) N L .J

. Ci \JVA
Michael F Easley, Governor
State of North Carolina
rj'^Ib William G Ross, Jr, Secretary
co rn Department of Environment and Natural Resources
O.0 DEC 0 `� 2004 Alan W Klimek, P E , Director
Division of Water Quality
December 8, 2004
MEMORANDUM
EDENR
To• Britt Setzer
NC DENR / DEH / Regional Engineer 3 2004Mooresville Regional Office
TER QUALITY
From Sergei Chernikov CE BRANCH
NPDES Unit
Subject. Review of Draft NPDES Permit NC0004961
Riverbend Steam Station
Please indicate below your agencys position or viewpoint on the draft permit and return this form by
January 8, 2005. If you have any questions on the draft permit, please contact me at telephone number (919)
733-5083, extension 594 or via e-mail at [e-mail].
RESPONSE (Check one)
19 Concur with the issuance of this perm ut provided the facility is operated and maintained properly, the stated
effluent lunuts'are met prior to discharge, and the discharge does not contravene the designated water quality
standards.
1-1
Concurs with issuance of the above permit, provided the following conditions are met-
1-1
et•
❑ Opposes the issuance of the above pernut, based on reasons stated below, or attached
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 -TELEPHONE [phone]/FAX [phone]
VISIT US ON THE WEB AT http //h2o enr state nc us/NPDES
t

I)ENR/,I)WQ
'FACT SHEEN FOR N'PDES PERMIT DEVELOEM'ENT
NPDIZS No, NG0004961
Facilitv Information
Applicant/Facility Name
Duke Energy Corporation— Riverbend Steam Station
Applicant Address
13339,H, agers Ferry Road, Huntersville, North Carolina 28078
Facility Address
P O Box 367; Mount Molly, North Carolina 28120
Permitted Flow
`No unlit
Type of Waste
100% industrial
Prim SIC Code,, 4911, —Electric Services
Facility/Permit Status
Class I/Active, Renewal
County
Gaston County
Miscellaneous
Receiving Stream
Catawba River
(Nit Island Lake)
Regional Office
Mooresville
Stream Classification
WS -IV and B
State Grld/USGSQuad
F15Sw
303(d) Listed9
No
Permit Writer
Sergei Chernikov
Subbasm
03-08-33
Date
December 1, 2004
Drainage Area (mi')
1800
001E Lit, 351 ?1' 28" N Long 806 SS' I2" W
001 tut_ 35° 22' 06''1 Long, 89° 5T 31" W
002B T.at35° 21' 51" N Long, 80'58' 11" W
Summer7Q10 (cfs)
80
Winter 7Q10 (cfs)
30Q2 (cfs)
Average Flow (cfs)
2700
IWC (%)
10%
BACKGROUND
Duke Energy's Riverbend Steam Station is a coal fired steam electric plant in Gaston County
The facility has three permitted outfalls in the current NPD;✓'S discharge permit, issued in May
2002, The sources of wastewater for these outfalls include non -contact cooling water, ash basin
discharge, sanitary waste, stormwater .from process areas, and sump overflows The facility has
requested to discharge vehicle wash water frons the ash basin outfall, 002
In addition, to NPUES Permit NC0004p61, the facility also holds 038SR20 (air permit) and
NCD024717423 (Flazardous wastes) The facility is typical of njost fossil power plants and is
subject to 40 CER 423 ,Steam Electric Power Generation Guidelines require that the NPDES
permit limit Fc, Cu and oil and grease,
The following descriptions of the wastes at each outfall are offered
001 — once -through condonser cooling water, and intake screen backwash
002 — ash basin discharge; mcludes wastewater from the yard drain sump, groundwater
remediation, turbine room stoups, stormwater runoff, cooling water, reverse osmosis unit,
mise seal and lab test waters, boiler blowdown, track hopper sump, boiler room sump,
turbine non-destnicti`ve testing and other mise process wastewaters
002A- yard drain sump overflow
This facility discharges to the Catawba River lust above Lake Wylie iii sub -basin 03-08-33 The
receiving stream is not listed as impaired [303 (d) -listed as of 2003], though dischargers
upstream of sake Wylie arc ,subject to the nutrient nuanagernent strategy developed for that
watershed

� L ,
One of the permit requirements is to perform an assessment of balanced and indigenous
populations in downstream Lake Wylie. The report states that "a balanced indigenous fish
community exists near the Riverbend Steam Station". The Environmental Sciences Section is
currently reviewing the report
REASONABLE POTENTIAL ANALYSIS (RPA)
The Division conducted EPA -recommended analyses to determine the reasonable potential for
toxicants to be discharged by this facility from outfall 002. Calculations included: arsenic,
selenium, copper, and iron. Results suggest no reasonable potential for the facility to discharge
any of the above toxicants.
Requested Modifications/Additions
With the permit application for renewal, Duke Power has requested the following modifications:
Mnnitorinss FrennenrieG
Parameter Present
Proposed
Oil & Grease Quarterly
Semi -Annually
Total Copper Quarterly
Semi -Annually
Total Iron Quarterly
Semi -Annually
Request by the permittee to reduce monitoring from quarterly to semiannually for O&G was
granted, however request to reduce monitoring for Cu and Fe declined since semi-annual
monitoring will not provide sufficient data for an RPA
Toxicity Testing:
Current Requirement: 24hr Chronic P/F @ 10%
Recommended Requirement: 24hr Chronic P/F @ 10%
Monitoring Schedule: January, April, July, October
This facility has passed all chronic toxicity tests during the previous permit cycle.
Compliance Summary'
This facility has been compliant with all parameters during the previous permit cycle, including
thermal limits. Report for Compliance Biomomtonng Inspection conducted on 8/26/2004 states
that "operation and maintenance of the facility are commendable".
Proposed Changes-
Monitoring
han es•Monitoring Frequencies: The monitoring frequency for oil & grease has been reduced to
quarterly.
Proposed Schedule for Permit Issuance:
Draft Permit to Public Notice: December 8, 2004 (est.)
Permit Scheduled to Issue: January 31, 2005 (est.)
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contact Sergei Chernikov at [phone] ext 594.
Fact Sheet
NPDES NC0004961 Renewal
Page 2

REGIONAL OFFICE COMMENT
7n %i,,..1G �� '4111P
v f A
NAME: -� E/—C�t DATE'
EPA REGION FV ENT:
NAME:
DATE:
Cact Shect
NPDCS \C)Uo14961 Rcnewal
-� � —i COm1LL•aiL.'TG'<ww� Cw' �T6 �'o^.:Ii:1Y�^tl1.: Y'WCK0.1A':IE: ��•-••+v.. �_
JAN 1 3 2005
DENR - WATER QUALITY
POINT SOURCE BRANCH
11

REASONABLE POTENTIAL ANALYSIS
Duke River Bend Steam Station
NC0004961
Time Period 2002-2004
Qw (MGD) 5.74
WWTP Class IV
7Q10S (cfs) 80
IWC (%) @ 7Q10S 10 008
7Q10W (cfs) 0
@ 7Q10W N/A
30Q2 (cfs) 0
@ 30Q2 N/A
Avg Stream Flow, QA (cfs) 2700
@ QA 03284
Rec'ving Stream Catawba River
Stream Class WS -IV B -CA
Outfall 001
Qw=5.74 MGD
'Legend
C = Carcinogenic
NC = Non -carcinogenic
A =Aesthetic
" Freshwater Discharge
4961-RPA-2004,rpa
12/212004
STANDARDS &
PARAMETER
TYPE
CRITERIA (2)
PQL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NC Wos / 14 FAV/
n # Det Max Pred Cw Allowable Cw
(t)
Chronic Acute
Acute N/A
Arsenic
NC
50
99Vh _H�
ug/L
15 15
1632
Chronic — 500---
V
Acute N/A
Iron
C
10000
ug/L
15 15
6162
_ _ _ _ _
Chronic 304,473
_ _ _ _
Acute 7
�
Copper
NC
7 AL 73
ug/L
15 10
372
_ _ _
---
J
----------------------/-- —
Chronic 70
Acute 56
Selenium
NC
50 56
ug/L
15 5
66
_
Chronic 50
---------------
-- vj---j1
Vel
'Legend
C = Carcinogenic
NC = Non -carcinogenic
A =Aesthetic
" Freshwater Discharge
4961-RPA-2004,rpa
12/212004

Whole Effluent Toxicity Testing Self -Monitoring Summary
2000 —
Y 2000 Pass
—
—
Invalid
•--
—
November 15, 2004
FACILITY REQUIREMENT
—
YEAR JAN
FEB
MAR APR
MAY_ JUN
JUL
AUG SEP
OCT
NOV DEC -
Duke Power -McGuire 001 24hr p/f ac lim 90%
--
2000 —
Pass
— —
Pass —
--
Pass —
—
Pass
NCO024392/001 Begin 10/1/2000 Frequency Q + Feb May AugNov
+ NonComp Single
2001 —
Pass
— --
Pass —
--
Pass --
--
Pass --
County Mecklenburg Region MRO Subbasin CTB32
—
2002 —
Pass
-- ---
Pass -•
--
>100,Pass —
--
Pass — ;-
PF NA Special
Pass
2003 __
Pass
-- —
>100 Pass
--
Pass —
—
Pass ---
7Q 10 80 IWC(%)90 Order
—
2004 --
Pass
— —
Pass —
—
Pass —
--
---
Duke Power -McGuire 002 48hr LC50 ac lim 64%
Dunn/Blackriver WWTP chrlim 1%
2000 --
>100
-- ---
>100 —
---
>100 ---
--
>100 --
NCO024392/002 Begin 10/1/2000 Frequency Q + Feb May AugNov
+ NonComp Single
2001 ---
>100
-- ---
>100 --
--
>100 ---
---
>100 ---
County Mecklenburg Region MRO Subbasm CTB33
---
2002 ---
>100
— --
>100 —
--
>100 ---
---
>100 ---
PF 0 3315 Special
2002 —
2003 —
>100
— —
Pass >100
—
>100 —
—
>100 ---
7Q10 800 IWC(%) 0 64 Order
--
2004 —
-- - --
>100
--
— ---
--- ---
>100 —
---- --
—
>100 -
—
—
Duke Power -McGuire 005 chr lim 14%
2000 Pass
—
-- Invalid
--- —
Late
Pass —
Pass
--- ---
NCO024392/005 Begin 10/1/2000 Frequency Q Jan Apr Jul Oct
+ NonComp Single
2001 Pass
—
-- Pass
--- —
Late
Pass —
Pass
•-- —
County Mecklenburg Region MRO Subbasrn CTB33
Dupont -Fayetteville Works chrlim 33%
2002 Pass
—
-- Pass
— —
Pass
-- —
Pass
— --
PF 0 754 Special
—
2003 Pass
—
— Pass
--- —
Pass
— —
Pass
-• —
7Q10 800 IWC(%)14 Order
Pass
2004 Pass
—
-- Pass
--• —
Pass
— --
—
County Bladen Region FRO Subbasin CPF16
Duke Power -River Bend 002 chrlim 10%
2000 —
Y 2000 Pass
—
—
Invalid
•--
—
Late
Pass
—
Pass
—
—
NC0004961/002 Begin 7/1/2002 Frequency Q Jan Apr Jul Oct
+ NonComp Single
2001 Pass
—
—
Pass
--
—
Late
Pass
—
Pass
—
—
County Gaston Region MRO Subbasin CTB33
552
2002 Late
Pass
—
Pass
—
552 —
140
---
—
Pass
—
>100
PF NA Special
—
2003 Pass
—
---
Pass
--
--
Pass
---
--
Pass
---
--
7Q10 800 IWC(%)1036 Order
—
2004 Pass
—
—
Pass
—
—
Pass
--
—
--
---
Pass
Dunn/Blackriver WWTP chrlim 1%
— Pass
2000 —
--
Pass
—
---
Pass
--
—
Pass
--
—
Pass
NCO043176/001 Begin 7/1/2002 Frequency Q Mar Jun Sep Dec
+ NonComp Single
2001 —
—
Pass
—
---
Pass
—
—
Pass
—
--
Pass
County Harnett Region FRO Subbasin CPF07
Pass
2002 —
—
Pass
—
--•
Pass
---
---
Pass
-•
--
Pass
PF 3 75 Special
•-•
2003 -_
—
Pass
—
—
Pass
—
—
Pass
—
---
Late
7QI0 586 6 IWC(%) 1 0 Order
Pass
2004 Late
Pass
Pass
—
—
Pass
—
—
Pass
—
—
Pass
Dupont -Fayetteville Works chrlim 33%
---
2000 •--
Late
Pass
—
Pass
--
—
Pass
—
--
Pass
—
NC0003573/001 Begin 2/1/2004 Frequency Q Feb May Aug Nov
+ NonComp Single
2001 —
Pass
Pass,Pass
—
Pass
—
—
Pass
—
—
Pass
—
County Bladen Region FRO Subbasin CPF16
2004 Pass
2002 —
Pass
—
--
Pass
--
—
Pass
—
—
Pass
—
PF 17 Special
2003 —
Pass
—
---
Pass
--
—
Pass
--
—
Pass
—
7Q10 7910 IWC(%)33 Order
2004 ---
Pass
--
—
Pass
—
---
Pass
--
Durham Co -Triangle WWTP chr lire 90%
Y 2000 ---
NR/Pass
--
—
Invalid
—
Pass
Pass
---
—
Pass
—
NCO026051/001 Begin 7/1/2002 Frequency Q Feb May Aug Nov
+ NonComp Single
2001 —
Pass
--
—
Pass
—
--
Pass
--
—
Pass
—
County Durham Region RRO Subbasin CPF05
2002 —
Pass
—
—
Pass
—
---
Pass
—
—
Pass
—
PF 60 Special
2003 _--
Fail
1100
1100
Pass
—
---
Pass
---
---
Pass
---
7Q10 00 IWC(%) 100 Order
2004 ---
Pass
—
—
Pass
—
--
Pass
—
Durham -Northside WWTP chrlim 90%
Y 2000 Pass
—
—
Pass
—
--
Pass
—
—
Pass
—
—
NCO023841/001 Begin 10/1/2003 Frequency Q Jan Apr Jul Oct
+ NonComp Single
2001 Pass
—
--
Pass
—
--
Pass
—
—
Pass
—
—
County Durham Region RRO Subbasin NEU01
2002 Pass
—
--
Pass
Pass(p)
--
Pass
---
—
Fail
1100
>100
PF 20 0 Special
2003 Pass
—
—
Pass
—
--
Pass
—
--
Pass
—
—
7QI0 0 075 IWC(%) 99 5 Order
2004 Pass
—
—
Pass
—
—
Pass
—
--
DYNEA USA Inc formerly Neste Resins chr lim 0 39%
2000 —
1697
849
21429
67
Late
3508
>90
—
---
>48 --
NC0000892/001 Begin 5/1/2004 Frequency Q + Feb May Aug Nov NonComp Single
2001 ---
209
34 7,>48
—
>48
—
--•
889
889
---
533 --
County Chatham Region RRO Subbasin CPF07
2002 —
620
—
--
552
—
--
552
---
—
552 —
PF 010 Special
2003 —
552
—
—
>100
—
—
843
—
•--
404 —
7Q10 400 IWC(%)039 Order
2004 —
552
--
--•
Invalid
--
—
Pass
—
E -flee, LLC WWTP CHR LIM 16%, 2 0% @ 10 MGD
2000 --
--
Pass
—
---
Pass
--
---
Pass
--
— Pass
NC0004120/001 Begin 2/1/2004 Frequency Q Mar Jun Sep Dec + NonComp SINGLE
2001 —
—
Pass
—
—
Pass
—
---
NR/H
--
— —
County Cleveland Region MRO Subbasrn BRD04
2002 —
—
H
—
—
H
—
--
H
—
— NR/H
PF 0 78 Special
2003 —
Pass
Pass
—
—
Pass
—
---
Pass
---
--- Pass
7Q10 76 IWC(%)24 Order
2004 --
—
Pass
--
•-•
NR
---
—
H
E I Dupont De Nemours/Mnston Fac. CHRLIM 19%
2000 Pass
—
—
Pass
—
—
Pass
—
—
Pass
-- ---
NC0003760/001 Begin 4/1/2003 Frequency Q Jan Apr Jul Oct + NonComp SINGLE
2001 Pass
—
—
Pass
—
—
Pass
—
---
Pass
— ---
County Lenoir Region WARO Subbasin NEU05
2002 Late
Pass
—
Pass
--
--
NR
Pass
--
Pass
-- --
PF 36 Special
2003 Pass
—
—
Pass
—
--
Pass
—
•--
Pass
-- -
7Q10 283 1 IWC(%) 1 9 Order
2004 Pass
—
—
Pass
--
—
Pass
—
--
Pass
Y Pre 2000 Data Available
LEGEND
PERM = Permit Requirement LET = Administrative Letter - Target Frequency = Monitoring frequency Q- Quarterly, M- Monthly, BM- Bimonthly, SA- Semiannually, A- Annually, OWD- Only when discharging, D- Discontinued monitoring requirement
Begin= First month required 7Q IO =Receiving stream low flow criterion (efs) += quarterly monitoring increases to monthly upon failure or NR Months that testing must occur - ex Jan, Apr, Jul, Oct NonComp - Current Compliance Requirement
PF=- Permitted flow (MGD) IWC%= Instream waste concentration P/F = Pass/Fail test AC = Acute CHR = Chronic
Data Notation f- Fathead Minnow,* - Cenodaphnia sp , my - Mysid shrimp, ChV -Chronic value, P -Mortality of stated percentage at highest concentration, at - Perforned by DWQ Aquatic Tox Unit, bt - Bad test
Reporting Notation ---= Data not required, NR - Not reported Facility Activity Status I - Inactive, N - Newly Issued(To construct), H - Active but not discharging, 1 -More data available for month in question, = ORC signature needed
17

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Carolyn Bryant
Date: December 6, 2004
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Gaston
NPDES Permit No.. NC0004961
MRO No.. 04-88
PART I - GENERAL INFORMATION
1. Facility and address: Riverbend Steam Station
Duke Power Company
13339 Hagers Ferry Road
Huntersville, N.C. 28078
2. Date of investigation: November 9, 2004
3. Report prepared by: Samar Bou-Ghazale, Environ. Engr. I
DEC 9 2004
DEMrR - V4 -TER
POINT SOURCE BRANT
CH
4. Person contacted and telephone number: Robert Wylie, Greg Philips, and Robert Jones
with Duke Power, Tel # [phone]. Dr. Sergei Cherniikov, with NPDES unit in
Raleigh was also present at the meeting.
5. Directions to site: From the jct. of Mount Holly-Huntersville Road and Hwy 16, travel
north on Hwy 16 = 2.8 miles (cross over Mountain Island Lake). Turn right at the stop
light onto Horseshoe Bend Beach Road. The Riverbend Steam Plant is located at the end
of this road.
6. Discharge point(s), List for all discharge points: -
outfall 001 outfall 002
Latitude: 350 21'28" 350 21'28"
Longitude: 80° 58'12" 800 58' 12"
Attach a USGS Map Extract and indicate treatment plant site and discharge point on map.
USGS Quad No.: F 15 SW USGS Name: Mountain Island Lake, N.C.
7. Site size and expansion area consistent with application: Yes.
8. Topography (relationship to flood plain included): The site is located on gently rolling hills
adjacent to Mountain Island Lake (Catawba River). None of the treatment facilities are
located in a flood plain.
9. Location of nearest dwelling: Greater than 1000 feet from the plant site.

� s �

Page Two
10. Receiving stream or affected surface waters: Mountain Island Lake (Catawba River)
a. Classification: WS -IV & B
b. River Basin and Subbasin No.: Catawba 030833
C. Describe receiving stream features and pertinent downstream uses: Mountain
Island Lake is used for primary and secondary recreation. The Cities of Charlotte,
Mount Holly and Gastonia use this reservoir as a water supply.
PART H - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
outfall 001 outfall 002
1. a. Volume of wastewater: 334.6 MGD 6.0 MGD
Sources of wastewater for outfall 001: condenser cooling water, filter backwash
from raw water intake screening device, and intake tunnel dewatering sump.
Sources of wastewater from outfall 002 (ash basin): Treated sanitary wastewater
from wastewater treatment system, groundwater remediation wastewater, turbine
room sumps, turbine non-destructive testing (approximately once every 5years a
maximum of 400 gallons of demineralized water mixed with 4 gallons of a
corrosion inhibitor), ID fan and pre -heater bearing cooling water, storm water run-
off (coal pile area, rail access, and powerhouse roof, paved and graveled areas),
track hopper sump, filtered water system, coal pulverizing mill cooling water,
closed system drainage (biocidal additives are used in this waste stream), turbine
room sump overflow, boiler seal water, miscellaneous system leaks (small leaks
from pump packings, seals, valves, and pipe connections), water from floor
washing, boiler blowdown, and chemical cleaning of boilers (biocidal additives are
used). Outfaull 002A is an overflow pipe built into the yard drain sump. The yard
drain sump carries flow from the sanitary system, groundwater remediation, and
turbine room sumps. There is the potential that wastewater from the yard drain
sump could reach receiving waters should an overflow occur as a result of pump
failure.
b. What is the current permitted capacity: None specified.
C. Actual treatment capacity of current facility (current design capacity): N/A
d. Date(s) and construction activities allowed by previous ATCs issued in the
previous two years; N/A
e. Description of existing or substantially constructed WWT facilities: The existing
WWT facilities at outfall 001 consist of screening only. The existing WWT
facilities at outfall 002 consist of three (3) 4000 gallon septic tanks in parallel and a
1200 gallon holding tank. Additional treatment at outfall 002 includes an oil/water
separator that eventually discharges to an ash basin.
f. Description of proposed WWT facilities: There are no proposed WWT facilities at
this time.

Page Three
g. Possible toxic impacts to surface waters: Biocides are used at various discharge
locations throughout this facility.
h. Pretreatment Program (POTWs only): Not Needed.
2. Residual handling and utilization/disposal scheme: Duke Power has obtained DWQ Permit
No. WQ0000452 to reuse ash from the existing ash basin. Residuals from the existing
septic tank are disposed of by Stanley Septic &Drain Services, tel # [phone].
Residuals which accumulate in the storm water collection system (oil trap tanks) are
disposed of by Haz-Mat Transportation & Disposal or by Hepco, Inc.
3. Treatment plant classification: Class I (for the GW remediation facilities)
4. SIC Code(s): 4911 Wastewater Code(s): 14, 68, 16, 69
5. MTU Code(s): 50007
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies
involved (municipals only)? No.
2. Special monitoring or limitations (including toxicity) requests:
a. Duke Power has requested a monitoring reduction for oil, grease, copper and iron
from quarterly to semi-annually at outfall 002. The justification for a reduction in
monitoring is that oil & grease monitoring data from July 2002 to July 2004 has been
less than detection. Also, copper and iron values have also been significantly below
their NPDES limits during the same period. Due to a change in the NPDES permitting
issuance cycle, Duke Power has requested sediment sampling be scheduled for 2008
and then every five hears, thereafter. Furthermore, Duke Power requests that
monitoring requirements for chromium, nickel, lead and silver be suspended since
historical data shows the values of these parameters are consistently below levels of
concern. The request for delaying the sediment sampling schedule as well as the
suspension request for chromium, nickel, lead and silver should be addressed by the
Aquifer Protection Section since these items are addressed in permit No.WQ0000452,
not in the NPDES permit.
3. Important SOC/JOC or Compliance Schedule dates: N/A
4. Alternative analysis evaluation: N/A

Page Four
PART IV - EVALUATION AND RECOMMENDATIONS
Duke Power has requested renewal of the subject permit. There have been no changes to
the existing WWT facilities since the permit was last renewed. Duke has requested modifications
to the monitoring contained in the current permit (see Part III, No. 2 (a) above). Review and
approval of these monitoring changes will be necessary by the NPDES Unit.
Pending a final review and approval by the NPDES Unit, it is recommended that the
permit be renewed as requested.
Signature of Report reparer Date
12/,
Water Quality Regi Supervisor Date

Possible sampling at other Duke Power locations that have similar sump
design will be considered depending on the sample results.
The analytical results will be summarized and sent to Mr. McIntire. Upon the
State's review of the results a decision regarding permitting and possible permit
limits will be issued by Mr. McIntire. Mr. Mease will copy the Mooresville office
on all correspondences.
Should you have questions regarding this matter, please contact John Mease at
[phone].
Sincerely,
Angela M. Grooms
Manager, Water Protection
1rm
cc: D. T. Shuping - Buck Steam Station
Mr. Mark McIntire - NCDENR
I