NC0024406_Permit Modification_20020516

J
'State' of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director
May 16, 2002
Mr. Michael Ruhe
Duke Energy Corporation
526 South Church Street
Charlotte, North Carolina 28201-1944
Interoffice mail code: EC11E
•
NCDENR,-"',--
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Permit modification
Permit NCO024406
Belews Creek Steam Station
Stokes County
Dear Mr. Ruhe:
On April 19, 2002, a final permit for the subject facility was sent to Duke Energy. On May 7, 2002, I spoke with
Robert Wylie of Duke Energy and he informed me that the limits for total suspended solids and oil and grease
appeared to be reversed. This was an inadvertent error and the limits have been changed to reflect the federal
effluent guidelines expressed in 40 CFR 423.
Please find enclosed the revised permit pages. The revised pages should be inserted into your permit. The old
pages may then be discarded. All other terms and conditions contained in the original permit remain unchanged and
in full effect. This permit modification is issued under the requirements of North Carolina General Statutes 143-
215.1 and the Memorandum of Agreement between North Carolina and the U. S. Environmental Protection Agency.
If any parts, measurement frequencies or sampling requirements contained in this permit modification 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 a written petition conforming to Chapter 150B of the North
Carolina General Statutes, 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.
If you have any questions concerning this permit modification, please contact Natalie Sierra at [phone],
extension 551.
Sincerely,
�(�Gregory J. Thorpe, Ph.D.
cc: Winston-Salem Regional Office, Water Quality Section
, NPDES Unit,..✓
Ms. Karrie jo Shell, US EPA Region 4
Point Source Compliance and Enforcement Unit
Central Files
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES

Permit NCO024406
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 003 (ash settling pond) to the Dan River. Such discharges shall be limited
and monitored by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly : Daily -,'`' Measurement Sample Type Sample Location
Avera 'e. _. = Maximum , . .Fre uenc
Flow
Weekly
Pump logs or
estimate
Effluent
Oil and Grease
15.0 m L
20.0 m L
Quarterly'
Grab
Effluent
Total Suspended Solids'
30.0 m L
100.0 m L
Quarterly'
Grab
Effluent
Total Arsenic
Quarterly'
Grab
Effluent
Total Selenium
26 /I
2/Month
Grab
Effluent
Total Phosphorus
Quarterly
Grab
Effluent
Total Nitrogen (NO2+ NO3+ TKN
Quarterly
Grab
Effluent
Sulfates
Monthly
Grab
Effluent
Fluoride
Quarterly'
Grab
Effluent
Total Iron2
1.0 m /L
Quarterly'
Grab
Effluent
Total Co ere
1.0 m L
Quarterly'
Grab .
Effluent
Chronic Toxici 2
Quarter) l
Grab
Effluent
Notes:
1. Quarterly monitoring for TSS, oil and grease and all toxicants shall be performed concurrently
with the Chronic Toxicity test.
2. Monitoring for total iron and copper shall be performed quarterly and on occurrence of a chemical
metal cleaning. Methods for determining "total metals" are defined in 40 CFR 136.
3. Whole Effluent Toxicity shall be monitored by chronic toxicity (Ceriodaphnia) P/F at 19%. Tests
shall be conducted in February, May, August and November (see Part A.(6.) for details).
The coal pile runoff and low volume wastes shall be discharged into the ash settling
pond.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
and shall be monitored 2/month at the confluence of the discharge and the receiving
waters by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace
amounts.
2

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Mr. Michael Rube
Duke Energy Corporation
526 South Church Street
Charlotte, North Carolina 28201-1944
Interoffice mail code: EC11E
Dear Mr. Ruhe:
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
April 19, 2002
Subject: Issuance of NPDES Permit NCO024406
Belews Creek Steam Station
Stokes County
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 following changes have been
made to the draft permit:
• The address on the permit has been changed with the subject facility located in Belews Creek instead of
Walnut Cove (permit cover sheet and supplement to the cover sheet).
• The sulfate limit, which was given based on data that was over three (3) years old, has been removed. Using
the most recent three years of sulfate data in a reasonable potential analysis resulted in a finding of no
reasonable potential. In addition, the monitoring frequency has been changed to monthly.
• The sample type for the chronic toxicity test has been changed to grab. This is consistent with the previous
permit and accurately represents the ash basin discharge.
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 Natalie Sierra at telephone number (919) 733-
5083, extension 551.
Sincerely,
0,g1nai Signeed BY
Mfr d nooari h
Y go r . Thorpe, Ph.D.
cc: Central Files
Winston-Salem Regional Office/Water Quality Section
NPDES Unit 4 '
Technical Assistance & Certification Unit
Aquatic Toxicology Unit
EPA Region 4
DEH
N. C. Division of Water Quality / NPDES Unit Phone: [phone]
1617 Mail Service Center, Raleigh, NC 27699-1617 fax: [phone]
Internet: h2o.enr.state.nc.us DENR Customer Service Center: 1800 623-7748

Permit NC0024406"
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
Belews Creek Steam Station
3195 Pine Hall Road (NCSR 1908)
Belews Creek
Stokes County
to receiving waters designated as the West Belews Creek/Belews Lake (outfall 00 1)
and the Dan River (outfall 003) in the Roanoke 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 June 1, 2002.
This permit and authorization to discharge shall expire at midnight on February 28, 2007.
Signed this day April 19, 2002.
Original Signed By
David A. -Goodrich
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NCO024406
SUPPLEMENT TO PERMIT COVER SHEET
Duke Energy Corporation is hereby authorized to:
1. Continue to discharge:
• Once through cooling water (outfall 00 1) consisting of intake screen
backwash, recirculating cooling water, station equipment cooling water
and once -through cooling water
• Ash basin discharge (outfall 003) consisting of wastestreams from the
power house and yard holding sumps, ash sluice lines, chemical holding
pond, coal yard sumps, stormwater and remediated groundwater.
From a facility located at Belews Creek Station, 3195 Pine Hall Road (NCSR
1908), Belews Creek in Stokes County, and
2. Discharge wastewater from said treatment works at the location specified on
the attached map into West Belews Creek/Belews Lake (outfall 001) and the Dan
River (outfall 003), which are classified C and WS -IV waters, respectively, in the
Roanoke River Basin.
2

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NCO024406 - Belews Creek Steam Station
Latitude (001):
36016'49.5" Receiving Stream (001): Belews Lake
Longitude (O011:
8003'39.8" Stream Class: C
Latitude (002):
36018'22.0" Receiving Stream (003): Dan River
Longitude(002):
8004'50.7" Stream Class: WS -1v
uad #:
B 18SE/Belews Lake, NC
Sub -Basin:
03-02-01 Permitted Flow: n o limit
Facility
Location
Y°
'�•a'k Lk
North
Duke Energy- Belews Steam Station
NCO024406
Map not to scale

Permit NCO024406
c
A. (1.) 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 once -through cooling water and intake screen backwash from outfall 001. Such
discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS 'MONITORING REDUIR
CHARACTERISTICS':
Montfily ° .; Daily Measurement Sample Type
Average Maximum . Fre uenc
Flow Continuous Pump Logs
Sample Loca
Effluent
Temperature OC OF
Daily Recorder/Grab Upstream
Temperature OC (OF)2
32-C 89.6
Daily Recorder/Grab Downstream
Temperature oC °F
Daily Recorder/Grab Effluent
Notes:
1. Sampling locations: Upstream - Upstream at Southern Railroad crossing of Belews Creek OR East Belews
Creek (site 405 or site 419), Downstream - Downstream at the discharge from the Dam. Upstream
temperature samples are to be measured one foot below the surface.
2. In no case should the ambient temperature exceed 32oC (89.6oF) as a result of Belews Creek Steam
Station operations. The ambient temperature shall be defined as the daily average downstream discharge
water temperature. In cases where the Permittee experiences equipment problems and is unable to obtain
daily temperatures from the existing temperature monitoring system, monitoring must be reestablished
within five working days.
Chlorination of the once through condenser cooling water and/or auxiliary 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.
I
3

Permit NC0024406
A. (2.) EFFLUENT LINIITATIONS 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 (ash settling pond) to the Dan River. Such discharges shall be limited
and monitored by the Permittee as specified below:
EFFLUENT'CHARACTERISTICS
'
LIMIT -Sr'":',
Monthly f)ai(y
Average Maximum
MONITORING REQUIREMENTS
Measurement . Sample TYRe Sample Location:
Frequency::,
Flow
Weekly
Pump logs or
estimate
Effluent
Oil and Grease
30.0 m L 100.0 m L
Quarterly'
Grab '
Effluent
Total Suspended Solids'
15.0 m L 20.0 m L
Quarterly'
Grab
Effluent
Total Arsenic
Quarterly'
Grab
Effluent
Total Selenium
26
2/Month
Grab
Effluent
Total Phosphorus
Quarterly
Grab
Effluent
Total Nitrogen (NO2+ NO3 + TKN ,
Quarterly
Grab
Effluent
Sulfates
Monthly
Grab
Effluent
Fluoride
Quarterly'
Grab
Effluent
Total Iron2
1.0 m L
Quarterly'
Grab
Effluent
Total Co ere
1.0 m L
Quarterly'
Grab
Effluent
Chronic Toxicity2
Quarterly'
Grab
Effluent
Notes:
1. Quarterly monitoring for TSS, oil and grease and all toxicants shall be performed concurrently
with the Chronic Toxicity test.
2. Monitoring for total iron and copper shall be performed quarterly and on occurrence of a chemical
metal cleaning.
3. Whole Effluent Toxicity shall be monitored by chronic toxicity (Ceriodaphnia) P/F at 19%. Tests
shall be conducted in February, May, August and November (see Part A.(6.) for details).
The coal pile runoff and low volume wastes shall be discharged into the ash settling
pond.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
and shall be monitored 2/month at the confluence of the discharge and the receiving
waters by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace
amounts.
4

Permit NCO024406
A.(3.) SPECIAL CONDITIONS
The following special conditions are applicable to Belews Creek Steam Station under NCO024406:
• There shall be no discharge of polychlorinated biphenyl compounds such as those commonly
used for transformer fluid.
• Outfall 006 - The monitoring requirements for this internal discharge have been relocated to the
actual discharge location (outfall 003). as of the February 1, 1998 NPDES permit. This discharge
must remain internal and discharge to the ash pond. If discharge to the. ash pond is relocated to
surface waters of the state, then the monitoring requirements for this discharge will be
reinstated.
• Continued intake screen backwash and non -contact cooling water are permitted without
limitations or monitoring requirements.
• 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.
• 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 "chemical metal cleaning waste" means any wastewater resulting from cleaning any
metal process equipment with chemical compounds, including, but not limited to, boiler tube
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
Belews Creek Steam Station are equivalent to that of a BMP.
• 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
• If the Permittee, after monitoring for at least six months, determines that the facility is
consistently meeting the effluent limits contained herein, the Permittee may request of the
Director that the monitoring requirements be reduced to a lesser frequency.
• The Dan River Monitoring Plan, Phase III, as referred in the Engineering Report dated June 10,
1983 and submitted to. DWQ, shall continue to be conducted.
R,

Permit NCO024406
A.(4.) 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 at the Duke
Power Company's Belews Creek Steam Station. Therefore, when the .following conditions are
implemented during metal cleaning procedures, effective treatment for metals canbe 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 ash pond with effluent stopped.
5. Boiler volume less than 86,000 gallons.
6. Chemicals for cleaning to include only one or more of the following:
a. Copper removal step- sodium bromate (NaBrO2), ammonium carbonate ((NH4)2CO3-H20,
and ammonium hydroxide (NH40H).
b. Iron removal step - hydrochloric acid (HCl), ammonium bifluoride ((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. (5.) 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,
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.
0

Permit NCO024406
A. (6.) 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 19.0%.
The permit holder shall perform at a minimum,guarterlu monitoring using test procedures outlined
in the "North Carolina Ceriodaphnia 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 February, May, August and November. Effluent sampling for this testing shall be performed at
the NPDES permitted final effluent discharge below all treatment processes.
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 11 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.
7

Permit NC00244061
A. (7.) 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 any 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 Form 101 and a map locating the discharge point and receiving
stream. Completion of Biocide Worksheet Form 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.
3

Re: modified fact sheet for Belews Creek
Subject: Re: modified fact sheet for Belews Creek
Date: Tue, 02 Apr 2002 13:00:01 -0500
From: [e-mail]
To: Natalie Sierra <[e-mail]>
Thanks for the revised fact sheet. Finalize the permit.
Karrie-Jo Robinson -Shell, P.E.
1 of 1 4/2/02 1:59 PM

Re: comments on NC00024406
` Subject: Re: comments on NC00024406
Date: Tue, 26 Mar 2002 07:41:49 -0500
From: [e-mail]
To: Natalie Sierra <Natalie. Sierra@ ncmail.net>
OK.
I just overlooked this language during my review.
Thanks for redoing the fact sheet for Belews. I think it will make
things clearer.
Karrie-Jo Robinson -Shell, P.E.
Natalie Sierra
<Natalie.Sierra@n To:
cmail.net> cc:
Subject
03/25/2002 05:23
PM
Karrie-Jo Shell/R4/USEPA/US@EPA
Re: comments on NC00024406
Karrie-Jo,
In all the discussion of the sump overflows, I'm not sure I addressed
some of
your other comments. One comment that you had on all three Duke permits
was
that no BMPs were included. All three permits have as a special
condition the
statement, " It has been determined from information submitted that the
plans
and procedures in place at <Name> Steam Station are equivalent to BMPs."
Moreover, it is the Division's position that the ash pond provides
adequate
treatment prior to discharge, and this constitutes a BMP.
Another comment you had regarded a schedule of compliance. I believe
that
schedules of compliance are referenced in our boilerplate.
I will send you a revised fact sheet for Belews Creek later this week,
which
will hopefully address your concerns such that we may issue that permit.
-Natalie
[e-mail] wrote:
> Natalie,
> Per my voice message to you today, I am forwarding draft comment on
the
> draft permit for Belews Creek Steam Station. I will try to call you
> later for us to discuss these comments before I finalize my letter.
> Karrie-Jo Robinson -Shell, P.E.
> 404/562-9308
> (See attached file: NC24406.wpd)
------------------------------------------------------------------------
1 of 2 4/2/02 4:28 PM

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATL ANTA_ GF0RGIA 9n3nS-asen
March 11, 2002
Natalie Sierra
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
NPDES Unit
i61 / Mail Service Center
Raleigh, NC 27699-1617
Subject: Draft NPDES Permit no. NCO022406
Belews Steam Power Plant
Dear Ms. Sierra:
I L FRIAR 1 3 2002
UENR - 1-'4 ITER QUALITY
POINT SOURCE BRAPICH
We have reviewed the draft permit and fact sheet for the above facility. The draft permit
and fact sheet were submitted to EPA -Region 4 via letter dated February 13, 2002. My
comments are as follows:
1. The version of the draft permit we received did not include Best Management Practices.
Please forward this part of the permit to me.
2. In accordance with 40 CFR 423.12(a)(5) and (12 ), mass limits should be included for total
iron and total copper for Outfall 003, rather than concentration limits.
Chemical metal cleaning wastes are discharged via Internal Outfall 006 to the Ash Pond
(Outfall 003). In addition to chemical metal cleaning wastes, the Ash Pond treats storin water,
coal yard sump wastewater, yard sump wastewater, condensate feedwater, ash sluice water and
wastewater from the power house sumps. Outfall 003 has a continuous discharge to Belews
Lake.
Per 40 CFR. 423.12 (a)(5), the quantity of pollutants discharged in chemical metal cleaning
wastes shall not exceed the quantity determined by multiplying the flow of chemical metal
cleaning waste times a concentration value of 1.0 mg/l, for both total iron and total copper.
Additionally, 40 CFR 423.12(12) states that:
"In the event that waste streams from various sources are combined for treatment or
discharge, the quantity of each pollutant or pollutant property controlled in paragraphs
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable . Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 25% Postconsumer)

M
(b)(1) through (11) of this section attributable to each controlled waste source shall not
exceed the specified limitations for that waste source."
The flow diagram submitted with the NPDES permit application indicates the intermittent
flow of chemical metal cleaning wastes is approximately 0.03 MGD. Based on this flow, the
mass limit for both total iron and total copper from Outfall 003 is 0.25 pounds/day (0.03 MGD x
8.34 pound-liter/MG - mg x 1.0 mg/1). According to the information in the NPDES permit
application, the mass of total iron from Outfall 003 was 12.9 pounds per day and the mass of
total copper was 0.43 pounds per day. These amounts exceed the allowable mass concentration
per the applicable effluent guidelines.
Please forward the revised draft permit and fact sheet reflecting the above comments. If you
have any questions or comment regarding my comments, please contact me by email at
shell.karrie_jc @U. )a. ov,_ or by phone at 404/562-9308.
cc: Mr. Michael Ruhe
Duke Energy Corp.
Yours truly,
Karrie-Jo Robinson -Shell, P.E.
Environmental Engineer
Permits and Biosolids Section
Permits, Grants and Technical Assistance Branch
Water Management Division

Puke
Power.
A Duke Energy Company
March 22, 2002
Ms. Natalie Sierra
North Carolina Department of Environment and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Belews Creek Steam Station
NPDES Permit NCO024406
Dear Ms. Sierra:
Duke Power Company
Fossil and Hydro Generation Department
P.O. Box 1006
Charlotte, NC 28201-1006
p
APR - 2 2002
DEAR - VIATER QUALITY
POINT SOURCE BRANCH
With reference to the draft subject permit that was issued by your office, Duke Energy Corporation offers the
following comments:
A.(2.) Effluent Limitations and Monitoring Requirements
• It is requested that the limit for sulfate be removed and a monthly monitoring requirement be identified
instead of twice per month. The reasonable potential calculation used data greater than three years old.
One of these data points skewed the results and indicated the need for a limit. The attached table
indicates the most recent data.
Due to the large size of the ash basin, this treatment system has a relatively long retention time. It is
therefore requested that sample type for the chronic toxicity be changed from composite to grab. A grab
sample should be sufficient to represent the discharge.
A. (6) Chronic Toxicity Pass/Fail Permit Limit
• In the first sentence under section A. (6) it is requested that the terminology "observable" be changed to
"unacceptable". The word "observable" could potentially be interpreted to mean that no level is
acceptable in which the reproduction level in the treatment water is less than the control water.
It is also requested that all of the pages in the permit be numbered.
Duke Energy Corporation plans to respond to the recently received memo from the Environmental Protection
Agency on this draft permit. Your office will be copied on any correspondence to the EPA associated with this
permit. If you have questions or need additional information please contact Robert Wylie at [phone].
Sincerely,
Michael A. Ruhe, Manager
North American Support
cc: Ms. Karrie-Jo Robinson -Shell, Environmental Protection Agency, Region IV
Attachment

Attachment
,Belews Creek Steam Station
NPDES Permit NCO024406
Outfall 003 Sulfate Results
Month/Year
Sulfate Results (mg/1) for
Outfall 003
Apr. 99
33.4
May 99
42.2
June 99
54.7
July 99
81.4
Aug. 99
38.1
Sept. 99
33.8
Oct. 99
33.1
Nov. 99
37.8
Dec. 99
37.6
Jan. 00
3 8.2
Feb. 00
37.6
Mar. 00
44.1
Apr. 00
42.0
May 00
43.3
June 00
41.9
July 00
43.4
Aug. 00
44.6
Sept. 00
41.6
Oct. 00
41.1
Nov.00
40.8
Dec.00
41.0
Jan. 01
39.9
Feb. 01
35.7
Mar. 01
36.5
Apr. 01
32.3
May 01
30.0
June 01
28.6
July 01
25.8
Aug. 01
26.4
Sept. 01
24.8
Oct. 01
25.5
Nov. 01
27.8
Dec. 01
33.7
Jan. 02
35.6
Feb. 02
34.5
Mar. 02
33.3
Average 37.8 mg/1
Max. Value 81.4 mg/l

COMMENTS ON BELEWS CREEK
Subject: COMMENTS ON BELEWS CREEK
Date: Fri, 22 Mar 2002 15:52:58 -0500
From: 'Robert R Wylie" <rrwylie @ duke-energy.com>
To: Natalie Sierra <[e-mail]>
Natalie,
I have sent to you a memo, signed by Michael Ruhe, with comments on Belews
Creek's draft NPDES permit. I plan on addressing the EPA's comments next
week. Hopefully we will have a chance to speak with them next week. I
had a few minor comments that I did not include in my letter but I am
noting below:
The address for Belews Creek Steam Station has changed. Instead of
Walnut Cove it should be Belews Creek. I saw that on the permit cover
sheet and also the supplement to the cover sheet.
I noticed under A(4) third paragraph, first sentence, a misspelled word
"oat". I think it was meant to be "at". Under A(4) item 4 the
misspelled word is "ahs". I think it was meant to be "ash".
Robert
1 of 1 3/26/02 9:51 AM

State of North Carolina
Department of Environment • •
and Natural Resources
Division of Water Quality — —
Michael F. Easley, Governor C D E R
William G. Ross, Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Febtuary 13, 2002
RErE$VED
MEMORANDUM ,N.,r. Dept. of CHNR
FEB 2 1 2002
To: Lee Spencer
NC;DENR.%-DEH;% Regional -Engineer Winston-Salem
W n-niton-S'alesm"116 onal Office��~ Regional I t llde
From: Natalie Sierra
NPDES Unit
Subject: Review of Draft NPDES Permit NCO024406
Duke Energy - Belews Creek Steam Station
Stokes County
Please indicate below your agency's position or viewpoint on the draft permit and return this form by
March 15, 2002. If you have any questions on the draft permit, please contact me at the telephone
number or e-mail address listed at the bottom of this page. E C E E
==='1"w'�in' v�v�w�wn'wig/i'Oi'wiv�v''vii�i�i�ivnA0VA0Viv'ein'wiv�v'�i'wiv�v�i�w�iv�iv�w NvA" oVAoViv'�i/W
RESPONSE: (Check one) I MAR - 5 2002
[jdConcur with the issuance of this permit provided the facility is operated aLdmistated effluent limits are met prior to discharge, and the discharge does no
water quality standards.
1-1
Concurs with issuance of the above permit, provided the following conditions are met:
F-1 Opposes the issuance of the above permit, based on reasons stated below, or attached:
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083, extension 551 (fax) 919 733-0719
VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES Natalie.sierra@ ncmail.net

Natalie,
I've reviewed the subject draft permit for implementation of WET and have the following comments:
The sample type for WET in the new permit is specified as "composite." Previously it was "grab." Is there a
reason for the change in sample type. It looks like other toxic parameters (arsenic, selenium, fluoride,
copper) use a grab in the draft.
When I calculate the IWC based on the numbers from the "Reasonable Potential Summary" sheet (Qw=7.4
MGD and 7Q10=80 cfs) I get 12.5%. According to the 8/19/96 wasteload allocation, Mary Cates calculated
IWC using
Qw=8.1 and 7Q10=80 cfs to get IWC=19%. I understand that the Qw we're using here is based on average
discharge and I have no problem using either IWC based on your best professional judgement. But I think it
would be best to make the numbers we reference consistent to prevent confusion, particularly in the future,
if someone tries to re -calculate the IWC based on the numbers from the RP sheet.
Thanks for the opportunity to comment on the draft,
Matt
Matt Matthews
NC DENR/Division of Water Quality
Aquatic Toxicology Unit
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
v-[phone]
f-[phone]
MailTo:Matt.Matthews @ ncmail. net

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NORTH CAROLINA
STOKES COUNTY
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said County and State, duly
commissioned, qualified and authorized by law to administer oaths,
personally appeared George W. Summerlin who being first duly
sworn, deposes and says: that he (she) is Publisher
(Publisher or other officer or employee authorized to make affidavit) of
MOUNT AIRY NEWSPAPERS, INC., engaged in the publication of a
newspaper known as KING TIMES NEWS, published, issued, and entered
as periodicals class mail in the city of King in said County and State; that
he (she) is authorized to make this affidavit and sworn statement; that the
notice or other legal advertisement, a true copy of which is attached
hereto, was published in KING TIMES NEWS on the following dates:
z f z 1 12,o
and that the said newspaper in which such notice, paper, document or
legal advertisement was published was, at the time of each and every
such publication, a newspaper meeting all of the requirements and
qualifications of Section 1-597 of the General Statutes of North Carolina
and was a qualified newspaper within the meaning of Section 1-597 of
the General Statutes of North Carolina.
This Z.I St day of 1%i , 2002
of person making affidavit
Sworn to and subscribed before me, this 2.V*_ day of
My
2002
Oftu A 0 / AA T�
of ry Public
PUBLIC NOTICE,
State of North Carolina
Environmental Management
Commission/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27 9Lf_A-Tfq7
NOTIFICATION OF
INTENT TO ISSUE A
NPDES WASTEWATER
PERMIT
On the basis of thorough
staff review and application
of NC General Statute 143.21,
Public law 92750o and other
lawful standards and regula-
tions, the North Carolina
Environmental Management
Commission proposes to
issue a National Pollutant
Discharge Elimination
System (NPDES) wastewater
discharge permit to the per-
sons) listed below effective
45 days from the publish date
of this notice.
Written comments regard-
ing the proposed permit will
be accepted until 3o days
after the publish date of this
notice: All comments
received prior to that date are
considered in the final deter-
minations regarding the pro-
posed permit. The Director
of the NC Division of Water
Quality may decide to hold'a
public meeting for the pro-
posed permit should the
Division receive a significant
degree of public interest.
Copies of the draft permit
and other supporting infor-
mation on file used to deter-
mine conditions present in
the draft permit are available
upon request and payment of
the costs of reproduction.
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 it number in
any co 'nmunication.
Interested pers ns may also
visit the Division of Water
Quality at 512 N. Salisbury
Street, --Raleigh; NC 27604-
1148 between the hours of 8
a.m. and 5 p.m. to review
information on file.

11
c
NORTH CAROLINA
STOKES COUNTY
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said County and State, duly
commissioned, qualified and authorized by law to administer oaths,
personally appeared George W. Summerlin who being first duly
sworn, deposes and says: that he (she) is Publisher
(Publisher or other officer or employee authorized to make affidavit) of
MOUNT AIRY NEWSPAPERS, INC., engaged in the publication of a
newspaper known as DAN -BURY REPORTER, published, issued, and
entered as periodicals class mail in the city of King in said County and
State; that he (she) is authorized to make this affidavit and sworn
statement; that the notice or other legal advertisement, a true copy of
which is attached hereto, was published in DANBURY REPORTER on
the following dates:
2 12-c 12-MZ-
and
zMZ
and that the said newspaper in which such notice, paper, document or
legal advertisement was published was, at the time of each and every
such publication, a newspaper meeting all of the requirements and
qualifications of Section 1-597 of the General Statutes of North Carolina
and was a qualified newspaper within the meaning of Section 1-597 of
the General Statutes of North Carolina.
This 2_04`' day of 52002
of person making affidavit
Sworn to and subscribed before me, this 2-0+1.— day of
nU__J k_j , 2002
GZ1t,4 L_
N tary Public
}
My Commission expires:
=--
OFFICIAL SEAL W
Notary Public, North Caroli
b�s
COUNTY OF STOKES
GARY WAYNE MARTIN
My Commission Expires Sept. 26, 2004
,
PUBLIC NOTICE
e0fi�4,51ofi
4
State of arolina
Environmental
beeF
Management
Commission/NPDES Unit
2P
1617 Mail Service Center
! y
Raleigh, NC 27699-1617
Notification of Intent to
Issue A NPDES Wastewater
Permit
On the basis of thorough
staff review and application
of NC General Statute 143.21,
Public law 92-500 and other
lawful standards and regula-
tions, the North Carolina
Environmental Management
Commission proposes to
issue a National Pollutant
Discharge ' Elimination
System (NPDES) wastewater
discharge permit to the per-
son(s) listed below effective
45 days from the publish
date of this notice.
Written comments regard-
ing the proposed permit will
be accepted until 30 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 receive a signifi-
cant degree of public inter-
est.
Copies of the draft permit
and other supporting infor-
mation on file used to deter-
mine conditions present in
the draft permit are available
upon request and payment
of the costs of reproduction.
Mail co 666r _ erits 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
permit number in'any com-
miinicatinn_ interested ner-
a

DENR/DWQ
AMENDEDFACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO024406
Receiving Stream
Belews Lake (001)
Regional Office; . ° `
Winston-Salem
and Dan River (003)
(WSRO)
Strearn'Cla'ssification: ''
' "
C (Belews Lake),
State Grid [�USGS�Quad ` `
B18SE/Belews Lake
WS -IV (Dan River)
3303(d) Listed?.'...'..,Belews
Lake (fish
Permit Writer
Natalie Sierra
advisory - selenium)
Subbasin:
03-02-01
Dat'..,1/30/02
Drainage Area (mit)
501 (Dan River)
, -
Mn
Summer 7Q10 (cfs)
80 (Dan River)��
_°
Winter 7Q10 (cfs):
160 (Dan River)
z4,
30Q2(cfs)
195 (Dan River)
Average Flow (cfs)
576 (Dan River)
IWC, (%)
19
ool: Lat. 36116' 49.5" N Long. 80° 03' 39.8" W
002: Lat. 36°18' 22.0" N Long. 80° 04' 50.7" W
006: Lat. 36° 17' 5.0" N Long. 80° 04' 18" W
BACKGROUND
Duke Energy's Belews Creek Steam Station is a coal fired steam electric plant in Stokes County.
The facility has three permitted outfalls in the current NPDES discharge permit, issued in January 1998.
The sources of wastewater for these outfalls include non -contact cooling water, ash basin discharge,
sanitary waste, cleansing and polishing water and stormwater from process areas.
In compliance inspection reports, the Winston-Salem Regional Office describes the facility as
providing excellent treatment and as generally being well operated and maintained with few compliance
problems.
In addition to NPDES Permit NC0024406, the facility also ,holds the following permits:
01983R12 (air .permit), NCD000856591 (Hazardous wastes), 85-03 (industrial landfill), and WQ0005873
(spray irrigation permit). The current permit expires February 28, 2002.
The outfalls are defined as follows (as per the 2002 permit application):
001: Condenser cooling water
001 discharges non -contact cooling water used to cool the equipment and condense
exhaust steam from the turbines. No chemicals are added to the water. Non -contact cooling
water for the station equipment, recirculated cooling water coolers and hydrogen and :oil coolers.
Intake screen backwash (from which the debris has been collected and composted) is also
discharged through this outfall. 001 discharges to Belews Lake.
003: Ash Basin
003 discharges the "process flow" that is regulated under federal effluent guidelines. This
discharge consists of flow from the power house sumps, the yard holding sump, the ash sluice
lines, the chemical holding pond, the coal yard sumps, groundwater remediation system, and run-
off from the watershed of the basin. 003 discharges to the Dan River.
Tact. Shz ceL
NPDES NC00244. 6ftenevgal
Ptloe 1

006:
006 discharges boiler and filter cleaning wastes on an as -needed basis. These wastes are
sent to the chemical holding pond, which then discharges through 003. 006 is therefore an
internal outfall, with limits being set at the point of discharge, outfall 003.
This facility does not require a 316(a) variance.
Permit Renewal Application: .
The permittee submitted the following items for permit renewal:
• EPA Form 1
• EPA Form 2E
• EPA Form 2C (with a priority pollutant analysis)
• Site Maps
• Water Flow Diagram
• Supplemental information
The following changes for outfall 003 only were requested:
• Reduction of total iron and total copper monitoring from monthly to only during chemical
metals cleaning.
• Change the oil and grease limit to a concentration based limit and reduce the sampling to
semi-annually
• Change the TSS limit to a concentration based limit and reduce the sampling to semi-
annually
• Reduce the total arsenic, sulfates, and fluoride monitoring to semi-annually.
• Reduce pH monitoring to monthly
The Permittee also requested some changes to the language of Part III.J.K. as regards chemical
metal cleaning wastes.
Instream Monitoring and Verification of Existing Conditions and DMR Data Review.
This facility discharges to both Belews Lake (001) and the Dan River (003). Outfall 006 is an
internal outfall discharging to the ash basin. Both are located within sub -basin 03-02-01 Belews Lake is
303(d) listed due to a fish advisory for selenium. The Division took measures to correct this by having
Duke Energy move the ash basin discharge out of Belews Lake and into the Dan River in May, 1985.
The 2001 Roanoke River Basin Report states that the concentrations of selenium in fish tissue in the lake
have declined to levels considered safe for human consumption by the Department of Health and Human
Services. The fish consumption advisory was lifted in August 2000. Moreover, data collected in the
Dan River below the lake showed tissue concentrations ranging from 0.10 to 1.03ug/g, below the state's
advisory criterion of 5 ug/g. The Dan River above Belews Lake is not listed as impaired[303 (d) -listed
as of 20001.
One of the permit requirements is to perform an assessment of balanced and indigenous
populations in Belews Lake. This requires the Belews Creek Plant to a number of uplake, in -lake and
downlake sampling sites. Three macroinvertebrate sampling stations are maintained in Belews Lake and
three fish monitoring stations. The report was evaluated by the Division's Biological Assessment Unit
and recommends: close monitoring of fish tissue to determine if selenium is being mobilized from
sediments to the food chain (or by benthic disturbances) and monitoring of the Dan River to determine if
there has been any increase in tissue concentrations of selenium.
Discharge Monitoring Reports (DMRs) for the outfalls were reviewed from January 1999
November 2001. Outfall 006 is an internal outfall and, as specified under Special Condition F of the
1998 permit, no monitoring requirements are specified for this outfall. The facility reports the average
flow as 0.03 MGD, though this outfall discharges only one day every four years. No discharges were
noted between January 1999 and November 2001. Flow and temperature (effluent, upstream and
downstream) are measured at outfall 001, a discharge consisting of once -through cooling water and
miscellaneous equipment and non -contact cooling water; flow during this time averaged 701 MGD. In
general, though the effluent temperature was several degrees higher than the upstream temperature, the
downstream temperature was the same or nearly the same as the upstream temperature. No exceedences
of the downstream temperature limit of 32°C were noted.
Faci Sheet
Noe 2

Outfall 003 consists of the ash basin discharge as well as flow from the power house and yard
holding sumps; the chemical holding pond, coal yard sumps, groundwater remediation water and
stormwater. The average flow from this outfall was 7.4 MGD with a high of 10.1 MGD. Selenium, iron,
copper, arsenic, fluoride, sulfate, TSS, oil and grease, total nitrogen and total phosphorus are monitored
at this outfall. The average TSS measurement in the outfall was 386.7 lbs./day, though the detection
level was highly variable. The average oil and grease measurement in the outfall was 208.8 lbs./day,
though, as with TSS, the detection level was variable. Average total nitrogen was 0.28 mg/L and average
total phosphorus was 0.005 mg/L (with many of the samples resulting in non -detects). The average,
maximum and minimum levels of toxicants are summarized in the table below:
Sulfate Fluoride Arsenic Copper Iron Selenium
(mg/L) (mg/L) (99/L) (mg/L) (mg/L) (999)
Average
41.7
0.3
10.4
0.018
0.07
13.4
Maximum
81.4
1.1
17.7
0.030
0.18
22.1
Minimum
24.8
Non -detect
4.2
Non -detect
0.01
8.1
These data are analyzed in the Reasonable Potential Analysis section below.
Correspondence.
The Winston-Salem Regional Office (WSRO) conducted four site visits and submitted
corresponding Compliance Evaluation Inspection Reports. The facility typically received satisfactory
ratings on these reports and was described as well maintained with an effluent that showed no visible
adverse impacts to the receiving stream. None of these inspections revealed a violation and no Notices
of Violation (NOVs) were noted during the file review. No staff report was available for this renewal.
In August 2001, the Technical Assistance and Certification Unit classified the plant as Class I.
The plant will soon be required to have an ORC on-site with physical/chemical certification.
PERMITTING STRATEGY
Waste Load Allocation (WLA). The Division prepared the last WLA in 1996 for each of the outfalls
using the updated streamflow data from the USGS' profile of the Roanoke. Mary Cabe of the NPDES
unit used the facility's average flow to get the IWC on which the toxicity test is based. The previous and
current effluent limits were based on guidelines and water quality standards. The Division has judged
previous parameters and limits to be appropriate for renewal with some exceptions (see Reasonable
Potential Analysis).
Technology Based Limits:
Outfall 003 has limits based upon the guidelines for low-volume waste sources as well as the
chemical metals cleaning guidance. The iron and copper limits were placed in the permit as
concentration based limits some time ago. This decision was based upon the large retention time
of the ash pond, which could result in iron and copper from a single metals cleaning event being
discharged over a long period of time. Since concentration based limits would be more
environmentally conservative in this case (i.e. more difficult to meet than a pound per day value
that could be modulated by varying the discharge volume), these were placed in the permit to be
protective of the receiving stream. It is the permit writer's decision to keep these limits as
concentration based for the protection of the aquatic environment. .
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 003. No chemicals are added to the wastestream
at 001 nor is Duke required to monitor for anything other than, flow and temperature at that outfall. The
RPA which follows for 003 is based on nearly three years of DMR data (January 1999 — November
2001) for sulfate, fluoride, arsenic, copper, iron, selenium, TSS and oil and grease. Other data was taken
from samples submitted with the facility's priority pollutant analysis (ppa). Calculations included:
arsenic, barium, chromium, copper, fluoride, iron, oil and grease, selenium, sulfate and total suspended
solids..
Fact Sheet
NPDFS NC002 4406Re ew it

Results suggest no reasonable potential for the facility to discharge arsenic, barium,
chromium, copper, fluoride, iron, oil and grease, and'total suspended solids. Reasonable potential
was demonstrated for selenium and sulfate. The selenium limit is based on the North Carolina water
quality standard for freshwaters (5 gg/L) and the 7Q10 flow. The limit previously listed in the permit
(23 gg/L) appears to be an error and shall be corrected to 26 gg/L in this permit. The sulfate limit is
based on the North Carolina water quality standard for water supply waters (250000 gg/L) and the 7Q10
flow. During the draft period, the permittee protested imposition of a sulfate limit since the finding of
reasonable potential was based upon a data point from March 1999. The analysis was re -run for data
running from April 1999 through March 2002 and no reasonable potential was found. The limit for
sulfate will therefore be removed and the monitoring frequency changed to monthly. Guidelines require
that the NPDES permit limit iron, copper, TSS and oil and grease.
Arsenic and fluoride, currently monitored monthly can now be monitored quarterly due to no
finding of reasonable potential. Total copper, due to the fact that it was rarely detected and showed no
reasonable potential, shall be monitored on a quarterly frequency. TSS and oil and grease can be reduced
to a quarterly monitoring frequency. Concentration based limits (using average flow and 7Q10
streamflow) are permissible. 'Total iron, as an action level pollutant showing no reasonable potential,
shall be monitored quarterly. Selenium and sulfate shall be assigned water quality limits with twice
monthly monitoring.
In conjunction with the RPA, the primary pollutant analysis was reviewed. The parameters
detected at levels above the intake values are as follows: fluoride, sulfate, aluminum, barium, boron,
iron, magnesium, molybdenum, chromium, copper and selenium,. Arsenic, fluoride, sulfate, selenium
and iron are already monitored through the NPDES permit and data on these parameters was.analyzed
above. For those compounds for which ambient concentrations are unknown (barium, chromium), the
data provided in the ppa was used in the RPA. No reasonable potential was demonstrated for barium and
chromium, so these do not need to be included in the effluent monitoring requirements. The aluminum
sample taken for the analysis indicated an aluminum concentration around ambient stream levels. It was
therefore determined that none of the parameters detected in the ppa (beyond those already in the permit)
need to be added to the monitoring requirements.
A similar analysis was performed for the ppa on outfall 001. Only sulfate and barium were
detected at levels higher than the intake. These compounds were present in levels -that are comparable to
ambient and well below water quality standards. Moreover, since no chemicals are added to the effluent
at 001 and it consists entirely of non -contact cooling water, it is unlikely that, these toxicants would be
present in any significant levels.
SUMMARY OF PROPOSED CHANGES
In keeping with Division policies the following will be incorporated into the permit:
Reduce arsenic, fluoride, iron and copper monitoring to quarterly (iron and copper
should also be monitored during metals cleaning).
• Reduce TSS and oil and grease monitoring to quarterly (and during metals cleaning);
change limits to concentration based.
• Add/change selenium and sulfate limits, monitoring to be 2/month.
pH will remain at twice monthly frequency. New Weekly Average and Daily Maximum limits are derived from
the latest NC/EPA policies considering 1/2 FA Vs and allowable concentrations based' on reasonable potential.
Since the release of the draft permit for public comment, the following changes have been made:.
• Change of address: the facility is now listed as being in Belews Creek, not Walnut
Cover, as specified on the cover sheet and supplement to the cover sheet.
• Removal of sulfate limit based on updated data set (April 1999 -March 2002) which
showed no reasonable potential. Monitoring frequency changed to monthly.
• Chronic toxicity sample changed to grab for consistency with previous permit as well
as nature of the discharge (ash basin has large retention time such that a grab sample
is representative of the discharge).
17,)CL sht> et
Pao" 4

ENCLOSURES: Reasonable Potential Analysis for outfall 003, primary pollutant analysis (ppa) for 003,
aquatic toxicity data. Additional compliance data available upon request.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice:
Permit Scheduled to Issue:
February 13, 2002.
April 2, 2002.
NPDES DIVISION CONTACT
If you have questions regarding any of the above information or on the attached permit, please contact
Natalie Sierra at [phone] ext. 551.
NAME: DATE:
Fact Shout

Facility Name =
Qw (MGD) _.7.4,=
WWTP Classification'
NPDES # =
Receiving Stream
IWC (%) =
Deli ws !.,Creek -sit
I Implementation
1
NM244
, Danju
19.00
easonable Potential Summary
70 20 30 40
Stream Classification - "WS
7QIOs (cfs)= 80:1
30Q2 (cfs)
Qavg (cfs)
Arsenic
I Implementation
I
Max. Pred Cw
27.1 µgA
jAre all reported values less than?
No
Limits
No
IMonitonn 9
Allowable Cw
266.9 µg/1
'Is the detection limit acceptable?
"has,
'i Monitor?
Yes
'FrequencyQrt1y ,
Barium.
;Implementation
Max Pred. Cw
37.0 mg/L
jAre all reported values less than?
I
Max. Pred Cw
Not a POC µg/1
!Are all reported values less than?
No
Limit?
Na
Monitoring,
Allowable Cw
5337.2 A
µgacceptable?Yes
IIs the detection limit
.'
`Monitor.
No
I Frequency None
Chromium
I Implementation
I
Max. Pred Cw
33.0 µg/1Are
all reported values less than?
No
Limit?
Na,
Monitoring
Allowable Cw
266.9 µg11
'Is [he detection limit acceptable?
Yes
Monitor?
No
„ ..,
Frequency None
X12FAv
1022W/l'
J
..
Max. Pred Cw
Allowable Cw
;Implementation
0.1 µg/1 !Are all reported values, less than?
37.4 µg11 [Is the detection limit acceptable?
No Limit?
Yes111_1 Monitor?
No' Monitoring
Yes [Frequency
I
Plouride
Implementation
Max Pred. Cw
Max. Pred Cw
2.3 µgA
,Are all reported values less than?
No
Limit?
Np
;Monitoring
Allowable Cw
9607.0 µg/1
IIs the detection limit acceptable?
Yes , ;
Monitor?
Yes
I Frequency .Qrtty
Iron
I Implementation
Max Pred. Cw
37.0 mg/L
jAre all reported values less than?
I
Max. Pred Cw
0.5 µg/1
Are all reported values less than?
No
Limit?
No'
MOnitOfing TO, be
Allowable Cw
5.3 µg/1
'Is the detection limit acceptable?
iYes
`iMonitor?
Yes
'Frequency,deterrrlirlGd
Oil & Grease
Implementation
Max. Pred Cw
18.4 mg/L
!Are all reported values less than?
No
Limit?
No
Monitoring Tobe
Allowable Cw
160.1 mg/L
IIs the detection limit acceptable?
3Yes
,JMonitor?
._
Yes
(Frequency deterrninedl
Selenium
I Implementation
I
Max. Pred Cw
32.6 µgA
jAre all reported values less than?
No
Limit?
Xes
1 Monitoring
Allowable Cw
26.7 µgA
;Is the detection limit acceptable?
=Yes_ >
,';Monitor?
Yes
;FrequenCV2/MQnth~<..
JUIIQLC
unptementanon
Max Pred. Cw
322.60 mg1L
Are all reported values less than?
No Limit?
Yes
Monitoring
Allowable Cw
300.30 mg1L
IIs the detection limit acceptable?
Yes -: ";Monitor?
Yes
I Frequency 2/Nlorjth° !°
Total Suspended Solids
Ivnplementation
[
Max Pred. Cw
37.0 mg/L
jAre all reported values less than?
No Limit?
No'
Monitoring To be
Allowable Cw
500.0 mg/L
'Is the detection limit acceptable?
Yes ";" Monitor?
Yes
' Frequency „deerrnifled
NOTE: "Limit?" field indicates "Yes" *only* if the parameter should be monitored based on water quality standards
If Monitoring Frequency indicates "To be determined," it is because that parameter has federal effluent guidelines associated with it.

Facility Name =
Belews Creek Steam Station
NPDES # =
Nc0024406
Qw (MGD) =
7.4
7QIOs (cfs)=
80
IWC (%) =
19.00
FINAL RESULTS
Arsenic
Max. Pred Cw 27.13
Allowable Cw 266.9
ESULTS
J Dev. 3.9527
ean 10.4
V. 0.3790
Number
of data points 35
Malt Factor = 1.53
Max. Value 17.7 µg/1
Max. Pred Cw 27.13 µg/1
Allowable Cw 266.9 µg/l
Parameter = Arsenic
Standard = 50.0 µg/l
Date
n <
Actual Data
BDL=1/2DL
Jan -99
1
6.1
6.100
Feb -99
2
5.5
5.500
Mar -99
3
6.1
6.100
Apr -99
4
5.3
5.300
May -99
5
4.7
4.700
Jun -99
6
7.3
7.300
Jul -99
7
13.6
13.600
Aug -99
8
11.2
11.200
Sep -99
9
17.7
17.700
Oct -99
10
17
17.000
Nov -99
11
10.1
10.100
Dec -99
12
9.9
9.900
Jan -00
13
9.5
9.500
Feb -00
14
8.4
8.400
Mar -00
15
4.2
4.200
Apr -00
16
4.3
4.300
May -00
17
5.2
5.200
Jun -00
18
9
9.000
Jul -00
19
8.6
8.600
Aug -00
20
8.6
8.600
Sep -00
21
12.6
12.600
Oct -00
22
11.5
11.500
Nov -00
23
14.6
14.600
Dec -00
24
13.7
13.700
Jan -01
25
12.7
12.700
Feb -01
26
12.1
12.100
Mar-Ol
27
10.7
10.700
Apr -01
28
9.6
9.600
May -01
29
8.4
8.400
Jun -01
30
13.3
13.300
Jul -01
31
13.5
13.500
Aug -01
32
10.5
10.500
Sep -01
33
15.7
15.700
Oct -01
34
16.8
16.800
Nov -01
35
17
17.000

Facility Name = Belews Creek Steam Station
NPDES # = Nc0024406
Qw (MGD) = 7.4
7Q10s (cfs)= 80 Date
IWC (%) = 19.00 ppa
FINAL RESULTS
Barium
Max. Pred Cw 448.5111
Allowable Cw 5337.2
ESULTS
d Dev. 1.0000
can 0.1
V. 11.4943
of data points 1
Mult Factor =
5155.30
Max. Value
0.1 µg/1
Max. Pred Cw
448.5111 pg/l
Allowable Cw
5337.2 pg/l
Parameter = Barium
Standard = 1000:0 I µg/1
n < Actual Data BDL=1/2DL
1 0.1 0.1

Facility Name =
Belews Creek Steam Station
NPDES # =
Nc0024406
Qw (MGD) =
7.4
7QJOs (cfs)=
80
IWC (%) =
19.00
FINAL RESULTS
Copper
Max. Pred Cw 0.1
Allowable Cw 37.4
RESULTS
n
<
Std Dev.
0.0047
Ian -99
Mean
0.0
0.005
C.V.
1.3866
2
Number
0.005
0.0025
of data points
23
<
Malt Factor =
4.32
Apr -99
Max. Value
0.0
pgA
Max. Pred Cw
0.1
pgA
Allowable Cw
37.4
pgA
Parameter = Co er
Standard = 7.0 pgA
Date
n
<
Actual Data
BDL=1/2DL
Ian -99
1
<
0.005
0.0025
Feb -99
2
<
0.005
0.0025
Mar -99
3
<
0.005
0.0025
Apr -99
4
<
0.005
0.0025
May -99
5
<
0.005
0.0025
Jun -99
6
<
0.005
0.0025
Jul -99
7
<
0.005
0.0025
Aug -99
8
<
0.005
0.0025
Sep -99
9
<
0.005
0.0025
Oct -99
10
<
0.005
0.0025
Nov -99
11
<
0.005
0.0025
Dec -99
12
<
0.005
0.0025
Jan -00
13
<
0.005
0.0025
Feb -00
14
<
0.005
0.0025
Mar -00
15
<
0.005
0.0025
Apr -00
16
<
0.005
0.0025
May -00
17
<
0.005
0.0025
Jun -00
18
0.03
0.0300
Jul -00
19
<
0.005
0.0025
Aug -00
20
<
0.005
0.0025
Sep -00
21
<
0.005
0.0025
Oct -00
22
<
0.005
0.0025
Nov -00
23
<
0.005
0.0025
Dec -00
23
<
0.005
0.0025
Jan -01
23
<
0.005
0.0025
Feb -01
23
<
0.005
0.0025
Mar-Ol
23
<
0.005
0.0025
Apr-Ol
23
<
0.005
0.0025
May-Ol
23
<
0.005
0.0025
Jun -01
23
<
0.005
0.0025
Jul -01
23
<
0.005
0.0025
Aug -01
23
<
0.005
0.0025
Sep -01
23
<
0.005
0.0025
Oct -01
23
0.005
0.0050
Nov -O]
23
<
0.005
0.0025

Facility Name = Belews Creek Steam Station
NPDES # = Nc0024406
Qw (MGD) = 7.4
7Q10s (cfs)= 80
IWC (%) = 19.00
FINAL RESULTS
Chromium
Max. Pred Cw 33.0
Allowable Cw 266.9
RESULTS
Std Dev. 1.0000
Mean 1.3
C.V. 0.8000
(Number
of data points 1
Factor =
26.44
Value
1.3 µg/1
Pred Cw
33.0 µg/1
vable Cw
266.9 pg/l
Parameter I Em!]
Standard 119/1
Date n < Actual Data BDL=1/2DL
ppa 1 1.3 1 1.3

Facility Name =
Belews Creek Steam Station
Parameter =
Flouride
NPDES # =
NC0024406
Standard =
1800.0-
µg/1
Qw (MGD) =
7.4
7QIOs (cfs)=
80
Date
n
< Actual Data
BDL=1/2DL
IWC (%) =
19.00
Jan -99
1
0.3
0.3
Feb -99
2
0.3
0.3
FINAL RESULTS
Mar -99
3
0.2
0.2
Flouride
Apr -99
4
0.2
0.2
Max. Pred Cw
2.3
May -99
5
0.3
0.3
Allowable Cw
9607.0
Jun -99
6
0.3
0.3
Jul -99
7
0.3
0.3
Aug -99
8
0.2
0.2
RESULTS
Sep -99
9
0.2
0.2
Std Dev.
0.2374
Oct -99
10
0.3
0.3
Mean
0.3
Nov -99
11
0.5
0.5
C.V.
0.7161
Dec -99
12
0.3
0.3
Jan -00
13
0.3
0.3
Number
Feb -00
14
0.2
0.2
of data points
35
Mar -00
15
1.1
1.1
Apr -00
16
0.3
0.3
Mult Factor =
2.12
May -00
17
0
0.0
Max. Value
1.1 µg/1
Jun -00
18
0.3
0.3
Max. Pred Cw
2.3 µg/1
Jul -00
19
0.3
0.3
Allowable Cw
9607.0 µg/1
Aug -00
20
0.5
0.5
Sep -00
21
0
0.0
Oct -00
22
0.3
0.3
Nov -00
23
0
0.0
Dec -00
24
0.3
0.3
Jan -01
25
0.5
0.5
Feb -01
26
0
0.0
Mar -01
27
0.4
0.4
Apr -01
28
0.3
0.3
May -01
29
0.3
0.3
Jun -01
30
1
1.0
Jul -01
31
0.7
0.7
Aug -01
32
0.4
0.4
Sep -01
33
0.6
0.6
Oct -01
34
0.2
0.2
Nov -01
35
0.2
0.2

Facility Name =
Belews Creek Steam Station
NPDES # =
Nc0024406
Qw (MGD) =
7.4
7QIOs (cfs)=
80
IWC (%) =
19.00
< Actual Data
FINAL RESULTS
Iron
1
Max. Pred Cw
0.5
Allowable Cw
5.3
RESULTS
Std Dev. 0.0557
Mean 0.1
C.V. 0.8150
of data points 35
Mult Factor =
2.3
Max. Value
0.2 µg/I
Max. Pred Cw
0.5 µg/1
Allowable Cw
5.3 pg/l
Parameter
Iron
Standard
10 .,. mg/L
Date
n
< Actual Data
BDL=1/2DL
Jan -99
1
0.2
0.200
Feb -99
2
0.04
0.040
Mar -99
3
0.15
0.150
Apr -99
4
0.2
0.200
May -99
5
0.07
0.070
Jun -99
6
0.07
0.070
Jul -99
7
0.03
0.030
Aug -99
8
0.03
0.030
Sep -99
9
0.05
0.050
Oct -99
10
0.02
0.020
Nov -99
11
0.18
0.180
Dec -99
12
0.03
0.030
Jan -00
13
0.1
0.100
Feb -00
14
0.09
0.090
Mar -00
15
0.16
0.160
Apr -00
16
0.05
0.050
May -00
17
0.06
0.060
Jun -00
18
0.03
0.030
Jul -00
19
0.15
0.150
Aug -00
20
0.03
0.030
Sep -00
21
0.02
0.020
Oct -00
22
0.02
0.020
Nov -00
23
0.02
0.020
Dec -00
24
0.06
0.060
Jan -01
25
0.06
0.060
Feb -01
26
0.04
0.040
Mar -01
27
0.07
0.070
Apr -01
28
0.07
0.070
May -01
29
0.13
0.130
Jun -01
30
0.06
0.060
Jul -01
31
0.03
0.030
Aug -01
32
0.02
0.020
Sep -01
33
0.02
0.020
Oct -01
34
0.01
0.010
Nov -01
35
0.02
0.020

Facility Name =
Belews Creek Steam Station
NPDES # =
Nc0024406
Qw (MGD) =
7.4
7Q10s (cfs)=
80
IWC (%) =
19.00
Feb -99
FINAL RESULTS
Oil & Grease
1.022
Max. Pred Cw
18.4
Allowable Cw
160.1
RESULTS
Std Dev. 1.2661
Mean 0.7
C.V. 1.7063
of data points 35
Factor =
3.90
Value
4.7 mg/L
Pred Cw
18.4 mg/L
vable Cw
160.1 mg/L
Parameter = Oil & Grease
Standard = 30.0 mg/L
Date
n
<
Actual Data
BDL=1/2DL
Jan -99
1
<
1.106
0.553
Feb -99
2
<
1.022
0.511
Mar -99
3
<
0.012
0.006
Apr -99
4
<
0.007
0.003
May -99
5
<
2.812
1.406
Jun -99
6
<
0.991
0.495
Jul -99
7
<
0.010
0.005
Aug -99
8
<
1.117
0.558
Sep -99
9
<
0.945
0.472
Oct -99
10
<
0.009
0.004
Nov -99
11
<
0.969
0.485
Dec -99
12
<
0.943
0.471
Jan -00
13
<
0.013
0.006
Feb -00
14
<
1.269
0.634
Mar -00
15
<
0.006
0.003
Apr -00
16
<
0.012
0.006
May -00
17
<
0.041
0.021
Jun -00
18
<
0.010
0.005
Jul -00
19
0.010
0.010
Aug -00
20
<
0.008
0.004
Sep -00
21
<
0.009
0.005
Oct -00
22
<
0.009
0.005
Nov -00
23
<
0.004
0.002
Dec -00
24
<
0.011
0.006
Jan -01
25
<
5.709
2.855
Feb -01
26
<
4.728
2.364
Mar -01
27
<
5.286
2.643
Apr -01
28
<
0.067
0.033
May -01
29
4.422
4.422
Jun -01
30
0.050
0.050
Jul -01
31
<
5.219
2.610
Aug -01
32
<
1.114
0.557
Sep -01
33
4.709
4.709
Oct -01
34
<
0.076
0.038
Nov -01
35
<
0.022
0.011

Facility Name =
Belews Creek Steam Station
NPDES # =
Nc0024406
Qw (MGD) =
7.4
7QIOs (cfs)=
80
IWC (%) =
19.00
7.05
FINAL RESULTS
Selenium
3
Max. Pred Cw
32.6
Allowable Cw
26.7
RESULTS
Std Dev. 4.6291
Mean 13.4
C.V. 0.3442
Number
of data points 35
Mult Factor =
1.48
Max. Value
22.1 µg/1
Max. Pred Cw
32.6 pg/l
Allowable Cw
26.7 pg/l
Parameter = Selenium
Standard = '5.0 Ng/l
Date
n <
Actual Data
BDL=1/2DL
Jan -99
1
5.45
5.5
Feb -99
2
7.05
7.1
Mar -99
3
7.25
7.3
Apr -99
4
9
9.0
May -99
5
8.55
8.6
Jun -99
6
13.8
13.8
Jul -99
7
16.95
17.0
Aug -99
8
16.05
16.1
Sep -99
9
11.7
11.7
Oct -99
10
11.8
11.8
Nov -99
11
10.6
10.6
Dec -99
12
10.6
10.6
Jan -00
13
11.05
11.1
Feb -00
14
12.55
12.6
Mar -00
15
11.5
11.5
Apr -00
16
11.6
11.6
May -00
17
12.9
12.9
Jun -00
18
17
17.0
Jul -00
19
17.6
17.6
Aug -00
20
16.9
16.9
Sep -00
21
18.8
18.8
Oct -00
22
17.4
17.4
Nov -00
23
18.45
18.5
Dec -00
24
19.7
19.7
Jan -01
25
21.9
21.9
Feb -01
26
22.1
22.1
Mar -01
27
21.05
21.1
Apr -01
28
17.7
17.7
May -01
29
15.35
15.4
Jun -01
30
13.8
13.8
Jul -01
31
11.1
11.1
Aug -01
32
9.1
9.1
Sep -01
33
8.15
8.2
Oct -01
34
8.05
8.1
Nov -01
35
8.1
8.1

Facility Name = Belews Creek Steam Station
NPDES # = Nc0024406
Qw (MGD) = 7.4
Average Q (cfs)= 576
FINAL RESULTS
Sulfate
Max. Pred Cw 322.6
Allowable Cw 300.3
RESULTS
n <
Std Dev.
24.5864
Mean
41.7
C.V.
0.5898
Number
2
of data points
35
Mult Factor =
1.89
Max. Value
170.6 m
Max. Pred Cw
322.6 m
Allowable Cw
300.3 m
Parameter = Sulfate
Standard = 250.0 mg/L
Date
n <
Actual Data
BDL=1/2DL
Jan -99
1
31.9
31.9
Feb -99
2
31.5
31.5
Mar -99
3
170.6
170.6
Apr -99
4
33.4
33.4
May -99
5
42.2
42.2
Jun -99
6
54.7
54.7
Jul -99
7
81.4
81.4
Aug -99
8
38.1
38.1
Sep -99
9
33.8
33.8
Oct -99
10
33.1
33.1
Nov -99
11
37.8
37.8
Dec -99
12
37.6
37.6
Jan -00
13
38.2
38.2
Feb -00
14
37.6
37.6
Mar -00
15
44.1
44.1
Apr -00
16
42
42.0
May -00
17
43.3
43.3
Jun -00
18
41.9
41.9
Jul -00
19
43.4
43.4
Aug -00
20
44.6
44.6
Sep -00
21
41.6
41.6
Oct -00
22
41.1
41.1
Nov -00
23
40.8
40.8
Dec -00
24
41
41.0
Jan -01
25
39.9
39.9
Feb -01
26
35.7
35.7
Mar -01
27
36.5
36.5
Apr -01
28
32.3
32.3
May -01
29
30
30.0
Jun -01
30
28.6
28.6
Jul -01
31
25.8
25.8
Aug -01
32
26.4
26.4
Sep -01
33
24.8
24.8
Oct -01
34
25.5
25.5
Nov -01
35
27.8
27.8

Facility Name =
NPDES # =
Qw (MCD) =
7QIOs (cfs)=
!WC (%) =
Belews Creek Steam Station
Nc0024406
7.4
80
19.00
C.V.
1.5602
FINAL RESULTS
TDS
Max. Pred Cw
Allowable Cw
37.0
500.0
RESULTS
n <
Std Dev.
2.3209
Mean
1.5
C.V.
1.5602
Number
2 <
of data points
35
Malt Factor =
3.65
Max. Value
10.1 mg/L
Max. Pred Cw
37.0 mg/L
Allowable Cw
500.0 mg/L
Parameter = TSS
Standard = 500.0
Date
n <
Actual Data
BDL=1/2DL
Jan -99
1
7.728
7.728
Feb -99
2 <
4.089
2.044
Mar -99
3 <
0.049
0.024
Apr -99
4
0.049
0.049
May -99
5 <
0.703
0.352
Jun -99
6 <
3.963
1.981
Jul -99
7 <
0.040
0.020
Aug -99
8 <
4.466
2.233
Sep -99
9 <
3.779
1.889
Oct -99
10 <
0.035
0.017
Nov -99
11
3.594
3.594
Dec -99
12 <
3.769
1.885
Jan -00
13
0.103
0.103
Feb -00
14
10.129
10.129
Mar -00
15 <
0.024
0.012
Apr -00
16 <
0.049
0.024
May -00
17 <
0.010
0.005
Jun -00
18 <
0.040
0.020
Jul -00
19
0.040
0.040
Aug -00
20 <
0.033
0.016
Sep -00
21 <
0.036
0.018
Oct -00
22 <
0.037
0.018
Nov -00
23 <
0.037
0.019
Dec -00
24 <
0.045
0.023
Jan -01
25 <
4.568
2.284
Feb -01
26 <
3.779
1.889
Mar -01
27 <
4.229
2.114
Apr -01
28
0.054
0.054
May -01
29
5.310
5.310
Jun -01
30
0.040
0.040
Jul -01
31 <
4.183
2.092
Aug -01
32 <
4.462
2.231
Sep -01
33
3.767
3.767
Oct -01
34 <
0.061
0.030
Nov -01
35 <
0.018
0.009
mg/L

Primary pollutant analysis results for Duke Energy's Belews Creek Steam Plant
NC0024406
Outfall 003
Predicted conc. (RPA) 0.4485 33 lin permit in permit in permit in permit in permit
red font indicates that all. Conc. Based upon EPA Rec. Criteria
fields in bold (no highlighting) indicate that concentration detected is around ambient or tap water values (conversation with Roy Byrd, 10/24/01)
fields with highlighting indicate those parameters that may require periodic monitoring to ensure that the discharge has no impact on the water quality of the receiving stream.
BASED on 19% IWC
CONCLUSION: None of the parameters detected in the ppa (beyond those already present in the permit) need be added to the permit monitoring
requirements
Parameter of concern
Aluminum
Barium
Boron Chromium
Magnesium
Molybdenum
" Arsenic
°Fiuprlc(e-- .Sulcate, 5eleniutll iron
(mg/L)
(mg/L)
(mg/L) (ug/L)
(mg/L)
(mg/L).'
(u /L)
_ ►ftg%L .(m L), {41L}(r[g1L
Actual concentration 0.113
0.087
0.407 1.25
3.16
0.022
..` 14.6 ,
0.65 44 6 22 9
Allowable concentration 0.263
1.13
not a POC 56.5
not a POC
not a POC
� !65 .5;
2.034 250
Predicted conc. (RPA) 0.4485 33 lin permit in permit in permit in permit in permit
red font indicates that all. Conc. Based upon EPA Rec. Criteria
fields in bold (no highlighting) indicate that concentration detected is around ambient or tap water values (conversation with Roy Byrd, 10/24/01)
fields with highlighting indicate those parameters that may require periodic monitoring to ensure that the discharge has no impact on the water quality of the receiving stream.
BASED on 19% IWC
CONCLUSION: None of the parameters detected in the ppa (beyond those already present in the permit) need be added to the permit monitoring
requirements

Whole Effluent Toxicity Testing Self -Monitoring Summary January 18, 2002
FACILITY REQUIREMENT
YEAR JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Dan River Inc. Harris Facility Penn chr lim: 0.75%
1998 >100
—
>100
—
--
>100
—
—
>100
--
--
>100
NCO093275/001 Bebdn:2/1/1999 Frequency: Q + Mar Jun Sep Dec
+ NonComp:Single
1999 —
—
Pass
—
—
Pass
--
—
Pass
—
—
Pass
County: Rutherford Region: ARO Subbasin: BRD02
2000 —
—
Pass
--
--
Pass
--
—
Pass
—
--
_
Pass
PF: 0.91 Special
2001 _-
—
Pass
—
—
Pass
--
—
Pass
—
—
7Q10: 186 IWC(%):0.75 Order:
2002
Dare County-(RO)/001 Perm 24hr p/fac monit: 90%mysid
1998 Pass
--
—
Fail,Pass
--
—
Fail,Pass
--
—
Pass
—
—
NC0070157/001 Begin:5/1/1995 Frequency: Q Jan Apr Jul Oct
NonComp:
1999 Pass
—
--
Pass
--
—
Pass
—
—
Pass
--
—
County: Dare Region: WARO Subbasin: PAS56
2000 Bt
Bt
—
Pass
--
—
Pass
—
—
Pass
—
--
PF: NA Special
2001 pass
—
—
Pass
—
—
Pass
—
--
Pass
—
7Q 10: 0 IWC('/.):NA Order:
2002
Dare County-(RO)/002 Perm 24hr p/f ac monit: 90% mysid
1998 Pass
—
--
Pass
—
—
Pass
—
--
Pass
--
--
NC0070157/002 Begin:5/1/1995 Frequency: Q P/F Jan Apr Jul Oct
NonComp:
1999 Pass
—
--
Pass
—
--
Pass
--
--
Pass
--
--
County: Dare Region: WARD Subbasin: PAS56
2000 Bl
--
—
Fail
Fail,Pass
--
Pass
---
--
Fail,Failt
---
—
PF: NA Special
2001 pass
--
—
Pass
--
—
Pass
--
--
Pass
—
7Q10:0 IWC(%):100 Order:
2002
Delta Mills P-2 perm chr lim: 11%; if exp I.5MGD chr lim 16%
1998 —
—
31
—
—
31
—
—
31
—
--
16
NC0006190/001 Begin:3/1/1998 Frequency: Q Mar Jun Sep Dec
+ NonComp:ChV Avg
1999 —
--
16
—
—
at
—
—
15
—
—
31
County: Catawba Region: MRO Subbasin: CTB35
2000 —
--
4.1
<3
Late
15.6,15.6
--
—
31
--
—
15.6
PF: 1.0 Special
2001 —
—
31.1
—
—
15.6
—
--
15.6
--
--
. 7Q 10: 12 1 WC(%):I I Order:
2002
Denton WWTP Perm chr lim: 90%
1998 --
Pass
—
--
Pass
--
--
Pass
--
--
, Fail,Pass
--
NC0026689/001 Begin:4/1/2000 Frequency: Q Feb May Aug Nov
+ NonComp:Single
1999 --
Pass
--
—
>90
--
--
51.9
73.48
>90
>90
—
County: Davidson Region: WSRO Subbasin: YAD08
2000 —
21.2
>90
--
36.7
>90
—
Pass
—
--
Pass
--
PF: 0.30 Special
2001 —
Pass
—
—
Pass
—
—
Fail,>100
NR
Pass
Pass
7QI0:0.0 IWC(%):100 Order:
2002
Dixie Yarns, Inc. Perm chr lint: 90% (Grab)
1998 --
Pass
—
Pass
—
—
Late
Pass
—
Pass
—
--
NC0083763/001 Begin:5/1/2000 Frequency:Q Jan Apr Jul Oct
+ NonComp:Single
1999 Pass
—
—
NR/Pass
—
--
Fail
Pass
—
NR
Pass
—
County: Stanly Region: MRO Subbasin: YADI2
2000 Fail
Pass
--
Pass
—
--
Fail
>100
>100
NR
Pass
--
PF: 0.072 Special
2001 Fail
>100
97.5
Late
H
H
H
—
H
Fail
>100
7Q10:0 IWC(%):100 Order:
2002
Duke Power -Allen 002 Perm chr lim: 16% (Grab)
1998 Pass
—
--
Pass
--
—
Pass
—
--
Pass
--
—
NC0004979/002 Begin:10/1/1996 Frequency: Q P/F + Jan Apr Jul Oct
NonComp: Single
1999 Pass
—
—
Pass
—
—
Pass
—
—
Pass
—
—
County: Gaston Region: MRO Subbasin: CTB34
2000 Pass
—
—
at
—
--
Late
Pass
—
Pass
—
--
PF: 11.6 Special
2001 Pass
--
—
Pass
—
—
Pass
--
—
Fail
>64
7Q10: 95.0 IWC( -/.):16 Order:
2002
Duke Power-Belews Creek/003 Perm chr lim: 19% (Grab)
1998 --
Pass
—
—
Pass
—
--
Pass
—
--
Pass
--
NC0024406/003 Begin:2/1/1998 Frequency: Q P/F + Feb May Aug Nov
+ NonComp:Single
1999 --
Pass
--
—
Pass
—
--
Pass
—
—
Pass
--
County: Stokes Region: WSRO Subbasin: ROA01
2000 --
Pass
--
--
Pass
—
---
Late
Pass
—
Pass
--
PF: 7.7 Special
2001 _-
Pass
—
—
Pass
--
--
Pass
—
—
Pass
7Q10:24.0 IWC(%):33.0 Order:
2002
Duke Power -Buck Steam Perm chr lim: 0.7% (grab)
1998 —
—
>100
--
—
>100
—
—
>100
—
—
>100
NC0004774/002 Begin:2/1/2000 Frequency: Q Mar Jun Sep Dec
+ NonComp:Single
1999 —
--
>100
--
—
>100
—
—
>100
--
—
>100
County: Rowan Region: MRO Subbasin: YAD04
2000 —
--
at
--
—
Pass
—
--
Pass
—
—
Pass
PF: NA Special
2001 __
—
Pass
—
--
Pass
--
—
Pass
—
--
7QI0:1030 IWC(%):0.598 Order:
2002
Duke Power-Cliffside Perm chr lion: 5.6% (Grab)
1998 —
--
Pass
---
--
Pass
—
--
Pass
--
--
Pass
NC0005088/002 Begin:3/1/1999 Frequency: Q P/F + Mar Jun Sep Dec
+ NonComp:Single
1999 --
—
Pass
--
--
Pass
--
--
Pass
--
—
Pass
County: Rutherford Region: ARO Subbasin: BRD02
2000 --
—
at
—
—
Pass
—
--
Pass
—
—
Pass
PF: 8.8 Special
2001 —
—
Pass
—
--
Pass
--
—
Pass
—
--
7Q10:287 IWC(%):4.53 Order:
2002
Duke Power -Dan River Perm chr lim: 0.88% (Grab)
1998 —
—
Pass
--
—
Pass
—
—
Pass
--
—
Pass
NC0003468/002 Begin:6/1/1997 Frequency: Q + Mar Jun Sep Dec
+ NonComp:Single
1999 —
—
Pass
—
—
Pass
—
--
Pass
—
•—
Pass
County: Rockingham Region: WSRO Subbasin: ROA03
2000 ---
—
Bt
--
—
Pass
--
—
Pass
—
—
Pass
PF: 1.8 Special
2001 —
---
Pass
--
—
Pass
--
---
Pass
—
--
7Q10:314.0 IWC(0/,):0.879 Order:
2002
Y Pre 1998 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 7QI0 =Receiving stream low Flow criterion (cfs) + = 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 (MCD) IWC%= Instream waste concentration P/F = Paw/Fail test AC = Acute CHR = Chronic
Data Notation: f - Fathead Minnow;' - Ceriodaphnia sp.; my - Mysid shrimp; ChV - Chronic value; P - Mortality of stated percentage at highest concentration; at - Performed by DWQ Aquatic Tox Unit; bt - Bad test
Reporting Notation: --- = Data not required; NR - Not reported Facility Activity Status: 1 - Inactive, N - Newly Issued(To construct); H - Active but not discharging; t -More data available for month in question; • = ORC signature needed
16

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Permit NC0003719
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUAL/ITY
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 regula 'ons promulgated and adopted by the North Carolina Environmental Management
0kmmission, and the Federal Water Pollu�ion Control Act, as amended,
Monsanto Company
is hereby auth ' ed to discharge `fvastewater from a facility located at
Monsa to - Fayetteville
68 ndar Creek Road
,Fayetteville
C ;' erland County
to receiving waters
in accordance with effluent limitations, i
conditions set forth in Part I, II, III and
River in the Cape Fear River Basin
f.
requirements and other
This permit shall become effective February 1, 2002. `•
This permit and au zrization to discharge shall expire a�,xnidnight on October 31, 2006.
Signed this day J uary 14, 2 1. \
2©o Z'
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

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State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F: Easley, Governor
William G. Ross, Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director
January 14, 2002
Ms. Deborah R. Small, Plant
Monsanto Company
P.O. Box 2307
Fayetteville, North Carolina
1 � •
NCDENFI
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Issuance of NPDES Permit NC0003719
Mons nto - Fayetteville WWTP
CuriZberland County
Dear Ms. Small:
Division personnel have reviewed and 1 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 IA3-215.1 and the Memorandum of Agreement between North
Carolina and the U.S. Environmental Protection Ag , cy dated May 9, 1994 (or as subsequently amended).
The following changes have been made fromyour draft permit.. 14/9$
• The test organism for the whole effluent to 'city test has been changed from Ceriodaphnia
dubia to fathead minnow. This correspop s to the toxicity language in your existing permit.
• Effluent `conductivity monitoring �as,been removed from the permit. This requirement was
not in your previous permit and `hasr'accidentally include d in the draft.
• A footnote has been added to the glyphosate monitoring requirement specified in Part A. 1.
This footnote specifies that after cleanup, glyphos to must be monitored six additional times
between February 1 and October 1, 2002. Followin a series of both internal discussions and
discussions with the EPA, it was determined that perio 'c monitoring of glyphosate is necessary to
ensure that this contaminant is no longer being discharg from the site. If these samples indicate
non -detects, then the Division can evaluate removal of glyp osate monitoring.
In addition to the changes made above, Monsanto requested sever1 other changes to the draft permit.
The Division regrets that we cannot comply with these requests; the followin explanations are offered:
Following the flow reduction to 0.5 -MGD, quarterly toxicity onitoring must continue. All
facilities discharging1"complex wastewater" in the state of North Carolina must have quarterly
toxicity monitoring. Once Monsanto closes, there will still be a wast water discharge from the two
adjacent OCPSFs. /The decision to continue toxicity monitoring is th efore made independent of
WWTP class and is dependent on the wastewater source. The only time nual testing is allowed' is
when the discharge is both sporadic and influenced largely by storm a ents. Please call Kevin
Bowden of the Aquatic Toxicology Unit at [phone] if you have any q stions.
The new facility owner must submit both an ownership change formand a modification
(which includes a description of the new process and a flow justification) s per condition A.
(5.). The Division feels that since the permit requirements were developed on asite-specific basis
for Monsanto, it is impossible to apply these limitations to a new, presumably diffe ent, industry. It
is anticipated that the new owner would have different wastewater characteris 'cs that would
require different permit conditions.
Stormwater monitoring shall continue at SW -1. Since no separate stormwater pe it exists for
the site, the existing stormwater monitoring requirements must remain in the permit. onsanto
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper

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may request an alternative monitoring site for stormwater (following plant shutdown). In this case,
the Division can make a minor modification to the permit to replace the existing monitoring site
(SW-1)with a more appropriate one.
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. �11,
Please note th�~at this permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit. This pTnit does not affect the legal
requirements to obtain oder permits which may be required by the Division of Water Quality or permits
required by the Division of Land Resources, the Coastal Area Managemen{Act or any other Federal or Local
governmental permit that ma} Kbe required.
If you have any questions concerning this permit, please ' ntact Natalie Sierra at telephone number
[phone], extension 551. \
Gregory J. Thorpe, Ph.D.
cc: Fayetteville Regional Office/Water Quality\E-
NPDES Unit /f
Point Source Compliance and Enforcement
Technical Assistance and Certification Unit
Mr. Roosevelt Childress, EPA Region IV
Mr. Manhar Patel, Monsantd Company
Ms. Hope Walters, Monsanto Company
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Permit NC0003719
A. (5.) SPECIAL CONDITION FOR TERMINATION OF MONSANTO
The Monsanto Roundup plant portion of this discharge is expected to terminate within the
first quarter of 2002. The Monsanto Company will retain control over the utilitie until such
time as the facility and t%41ities are purchased.
The allocation for this permitted discharge remains at 1..25 MGD. However, new permit for
the discharge will be issued en 1hipi
of the following take place:
• Proof of change of o from Monsanto Company has b n furnished. The
resulting name/owne ship change form shall be submitted�o the Division of
Water Quality.
• A new application for a 'scharge has been completed
owner of the facility with request for a major modific
• The request for a major mo, ification to NPD ES Pe
include the appropriate feer such an action.
• Completion of the application hall include a com et(
proposed discharge and an Fn ' Alte ative
When all of the above actions are complete, Division
pages that are appropriate for the proposed dis barge o3
A. (6.) BIOCIDE CONDITION
The permittee shall not use any biocides except
permit application. The permittee shall notify t
(90) days prior to instituting use of any additio
may be toxic to aquatic life other than those re
Quality. Such notification shall include co ple
map locating the discharge point and rec wing
submitted by the new
y(ion of the NPDES permit.
NC0003719 should
flow justification for the
Analysis (EAA) .
I furnish new effluent limits
of discharges.
i\ofB
roved in conjunction with the
r in writing not later than ninety
used in cooling systems which
ported to the Division of Water
cide Worksheet Form101 and a
stream.
A. (7.) DETECTION LEVELS FOR COMPLIANCE
If the discharge limitation of a ven parameter is below quantitation limits, the measured
quantity for the purposes of compliance evaluation is considered o be zero. Values that
report below quantitation,level shall be deemed to be in compliance.

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DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0003875
BACKGROUND
Occidental Chemical's Castle Hayne plant is the second largest producer of chromium
based chemicals in the world; the major product at the facility is sodium dichromate.
Process wastewater is discharged through outfall 001 and consists of groundwater
remediation water, reject residue from the pH adjustment unit and recycle residue. Domestic
wastewater is discharged through outfall 002; both outfalls discharge to the Northeast Cape Fear
River. Outfall 003, which was used for the discharge of vehicle wastewater, was eliminated
during this permit period.
Waste sludge is disposed as slurry and sent to a quarry permitted under non -discharge
permit WQ0001492. The domestic sludge is land applied under WQ000783. The facility has
been issued one Authorization to Construct (ATC) in 2001 for the use of sulfur dioxide as an
alternative reducing agent instead of spent pickle liquor.
Instream Monitoring and Verification of Existing Conditions and DMR Data Review:
This facility discharges to the Northeast Cape Fear River (classified B-Sw) in subbasin
03-06-23. As a member of the Lower Cape Fear monitoring coalition, the instream monitoring
requirements have been waived. There is no appropriate upstream monitoring station on the
Northeast Cape Fear, but data from station NCF117 was used to assess downstream impacts of
the discharge. Available data was culled from the Coalition's water quality reports and shows
most of the monitored parameters (temperature, turbidity, chlorophyll a, BOD, etc.) to be within
acceptable ranges. There are a few data points for fecal coliform that approach or exceed 200
CFU/100 mL, but most data are below 100 CFU/100 mL. BOD and nutrient levels are fairly
low.
Fara Sheet
NPDES NCO003875 Renewal
Pa -e 1
Facllity I rmation
Applicant/Facil ty' Name: _
Occidental Chemical Co oration — Castle Hayne Plant
A licant Address:
5408 Holly Shelter Road; Castle Hayne, North Carolina 28249
Facility Address.
5408 Holly Shelter Road; Castle Hayne, North Carolina 28249
Permitted Flow`,
0.785 MGD (001) and 0.020MGD (002)
T 00 of Waste:
Industrial (001) and domestic (002)
Facility/Permit Status:.;
Class I (physical chemical) and Class II (biological)/Active; Renewal
Primary SIC Code: 2819
Count
New Hanover County
Aseellaneous
Receiving Stream:.
Northeast Cape
Regional Office: `Wilmington
(WiRO)
Fear River
Stream Classification:
B -Swamp
State Grid / USGS Quad:
J27NE/1\400retown,
NC
303(d) listed., _
No
Permit Writer:
Natalie V. Sierra
Subbasm
03-06-23
Date:.
14November0l
Drainage Area- (iru2)`. "
1426
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Summer7Q10.(cfs)
25
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ffi.
Winter7Q10„(cfs).
90
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30Q2 (cfs)
150
�.
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Avera e "Flow (efs),:
1800
...
IWC (°Io}
4.6
001: Lat. 34° 22' 34” N Long. 77° 51' 55" W
002: Lat. 341 22' 34" N Long. 77° 51' 55" W
BACKGROUND
Occidental Chemical's Castle Hayne plant is the second largest producer of chromium
based chemicals in the world; the major product at the facility is sodium dichromate.
Process wastewater is discharged through outfall 001 and consists of groundwater
remediation water, reject residue from the pH adjustment unit and recycle residue. Domestic
wastewater is discharged through outfall 002; both outfalls discharge to the Northeast Cape Fear
River. Outfall 003, which was used for the discharge of vehicle wastewater, was eliminated
during this permit period.
Waste sludge is disposed as slurry and sent to a quarry permitted under non -discharge
permit WQ0001492. The domestic sludge is land applied under WQ000783. The facility has
been issued one Authorization to Construct (ATC) in 2001 for the use of sulfur dioxide as an
alternative reducing agent instead of spent pickle liquor.
Instream Monitoring and Verification of Existing Conditions and DMR Data Review:
This facility discharges to the Northeast Cape Fear River (classified B-Sw) in subbasin
03-06-23. As a member of the Lower Cape Fear monitoring coalition, the instream monitoring
requirements have been waived. There is no appropriate upstream monitoring station on the
Northeast Cape Fear, but data from station NCF117 was used to assess downstream impacts of
the discharge. Available data was culled from the Coalition's water quality reports and shows
most of the monitored parameters (temperature, turbidity, chlorophyll a, BOD, etc.) to be within
acceptable ranges. There are a few data points for fecal coliform that approach or exceed 200
CFU/100 mL, but most data are below 100 CFU/100 mL. BOD and nutrient levels are fairly
low.
Fara Sheet
NPDES NCO003875 Renewal
Pa -e 1

Review of "Assessment of Balanced and Indigenous Populations in Belews Lake"
Fisheries data:
1. Tables 4.2 and 4.3 compare 10 uplake sites with 10 downlake sites. What is -needed is to
compare 10 uplake sites with 5 mid -lake sites (Site Nos. 1-5) and with 5 downlake (below old
ash pond discharge) sites (Site Nos. 6-10).
2. Was the 2001 sampling conducted? If so, how did it compare to earlier data? If it was not
conducted, then it is not appropriate to reduce monitoring to every two years (page 4-4) prior to
our review of the 1994 - 2001 data. We would have to wait to see what the 2001 data look like
before committing to a reduction in the monitoring program. We request that Duke analyze and
summarize the 2001 data.
Benthic macroinvertebrate data:
This information is very hard to evaluate without more detailed information on study sites and
sampling techniques. Since there are no standards/criteria given for a "balanced indigenous"
benthic community in a piedmont lake, the whole process is meaningless without adequate
control sites. There are no comparisons with other lakes and the limited within -lake comparisons
are flawed.
1. There seem to only 3 sites (sampled once per year) to evaluate lake benthos. Why are there
no samples taken from the discharge basin (above the canal). This should be the hottest part
of the lake, and an area where there might be an interaction with selenium? Why is there no
station near the old ash basin discharge?
2. It is not clear how samples were collected, other than that they were taken with ponar grabs.
What is the depth of sampling? Was an attempt made to sample similar depths and -substrates
at each site?
3. It is difficult to follow any changes over time with the present format of the tables. If we are
looking for recovery, then we should follow a single site over time.
4. If we want to look at changes over time, then some comparison with the many "Weiss et al."
reports should be consulted for some idea of invertebrate populations prior to the selenium
impact. We would hope that Duke still has these reports on file.
5. It would appear that these Duke Power lake sites are not comparable. The "uplake" sample is
dominated by Chaoborus, suggesting that samples were taken below the thermocline in a
stratified area, while other samples appear to be above the thermocline. This negates the
within -lake comparison used to deduce no impact.
6. While there seems to be some agreement that selenium levels are elevated, there is no
comparison with literature values to determine if these levels are dangerous.
Fish Tissue Data:
1. Biomass declines were noticeable in common carp during 1999-2000. The declines were
attributed to natural mortality and poor recruitment, but selenium levels were reported as being
highest in this species during the same time period. What data or observations are there that
suggests that the carp decline is purely "natural" . I agree that close monitoring should continue
to determine if selenium is being mobilized from sediments to the food chain or by benthic
disturbances from a species like carp.

2. Close annual monitoring of the Dan River. is also warranted to determine if increases in
selenium in catfish, suckers, and some sunfish continues.

BELEWS CREEK STEAM STATION'
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3/28/92
5/13/92
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11/13/92
12/29/92
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3/31/93
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" 1y
Puke
Power®
A Duke Energy Company
August 20, 2001
Mr. Charles H. Weaver, Jr.
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1646
Subject: Duke Power — NPDES Permit Modification
Belews Creek Steam Station - #NC0024406
Record #: DP -005157
Certified: 7000 1670 0001 5510 0340
Dear Mr. Weaver:
Duke Power
Group Environment, Health & Safety
MG03A5
13339 Hagers Ferry Road
Huntersville, NC 28078-7929
Duke Energy requests the subject permit be renewed and reissued. The above
referenced permit expires February 28, 2002. As mandated by North Carolina
Administrative Code 15A NCAC 2H.0105 (e), this permit application for renewal is
being submitted at least 180 days prior to expiration of the current permit.
Please find enclosed in triplicate, the renewal application, which includes the
following items:
EPA Form 1
EPA Form 2C — including Priority Pollutant Analysis
Site Map
Water Flow Diagram
Supplemental Information
Duke Energy requests notification that this application is complete.
The following monitoring reductions at outfall #003 are requested based on
historical monitoring data, which are attached. The frequencies were determined
using the EPA guidelines for "Performance -Based Reduction of Monitoring
Frequencies." The suggested methodology changes are based on the Steam
Effluent Guideline in 40 CFR 423.12.
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Duke Energy requests the subject permit be renewed and reissued. The above
referenced permit expires February 28, 2002. As mandated by North Carolina
Administrative Code 15A NCAC 2H.0105 (e), this permit application for renewal is
being submitted at least 180 days prior to expiration of the current permit.
Please find enclosed in triplicate, the renewal application, which includes the
following items:
EPA Form 1
EPA Form 2C — including Priority Pollutant Analysis
Site Map
Water Flow Diagram
Supplemental Information
Duke Energy requests notification that this application is complete.
The following monitoring reductions at outfall #003 are requested based on
historical monitoring data, which are attached. The frequencies were determined
using the EPA guidelines for "Performance -Based Reduction of Monitoring
Frequencies." The suggested methodology changes are based on the Steam
Effluent Guideline in 40 CFR 423.12.

• Reduction of monitoring of Total Iron and Total Copper from monthly to
occurrence of a chemical metal cleaning.
• Change Oil and Grease from a mass based to a concentration based limit,
ea--�i e,-`7�
reduce sampling frequency from monthly to once/per six months.�6„
• Change Total Suspended Solids from a mass based to a concentration
-�-
based limit, reduce sampling frequency from monthly to once/per six
C rY �6I
months.
• Reduction of Total Arsenic from monthly to once/per six months.
• Reduction of Sulfates from monthly to once/per six months.
• Reduction of Fluoride from monthly to once/per six months.
• Reduction of pH from twice/month to once/month.
Duke Energy also requests that the definitions in the Special Conditions of this
permit (see Part III.J.,K.) be revised as to read as follows:
The term "metal cleaning waste" means any wastewater resulting from
cleaning (with or without chemical cleaning componds) any metal process
equipment including, but not limited to, boiler tube cleaning, boiler fireside
cleaning, and air preheater cleaning.
The term "chemical metal cleaning waste" means any wastewater resulting
from the cleaning of any metal process equipment with chemical
componds, including, but not limited to, boiler tube cleaning. Chemical
metal cleaning will be conducted according to approved Duke Power
equivalency demonstration.
Thank you in advance for your assistance on this matter. Should you have
questions regarding this application, please contact Allen Stowe at [phone].
Sincerely,
i
Michael A. Ruhe
Manager, Water Compliance
Group Environment, Health and Safety
jas/bcsscovperappl
5a(o S, Cti-ti-S-l S k

Monitoring Reductions
Belews Creek
Monitoring data June 1999 — May 2001
Attachment
Parameters
pH
O&G
TSS
Arsenic
Sulfates
Fluoride
Units
SU
Lbs/Day
Lbs/Day
ug/1
mg/1
mg/1
Permit or WQ Limits
6.0-9.0
989.0
1978.0
50.0
250
1.8
Average Effluent
NA
16.4
103.6
10.4
41.3
0.3
Number of Measurements
107
24
24
24
24
24
* Ratio
NA
1.7
5.2
20.8
16.5
16.7
*The ratio equals the long-term effluent average to the monthly average (or Water Quality) limit.
Based on Table 1 of EPA's " Interim Guidance for Performance -Based Reduction of NPDES Permit Monitoring Frequencies" the
following reductions are requested.
• All parameters (except pH) ratio of effluent concentration to monthly average are less than 25 percent. Therefore a reduction
from monthly to twice per year is requested.
• A reduction for pH from twice per month to once per month is requested based on compliance history.

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• FIGURE 1. USGS TOPOGRAPHIC MAP OF THE AREA
AROUND BELEWS CREEK STEAM STATION
8005' 8004'30" 8004' 8003'30" 8003' 8002'30"
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,, J-� /' ? Yr/✓' •7-�`_t ,:(r % C, ,! .,:
8005' 8004'30" 8004' 8003'30" 8003' 8002'30'
0 0.5 1 Kilometers
N
0 0.5 1 Miles
CONTOUR INTERVAL 20 FEET
00
0
W
'0
0
OD
W
0
W
0
W
0)
0
TWT
V/
0
0
W
0
0

Belews Creek Steam Station
0.35 mgd
Intake
Screen
D BW
m
E
N
O
0
Belews Lake
Station Intake
Area
Station Equip
Cooling Water
Condenser
Cooling Water
Water
Treatment
Ash Sluice
Belews Creek Steam Station, Stokes County
NPDES Permit # NCO024406
Page 1 of 1
pressure Cooler
service water S stem
Outfall 001
1056 mgd 0.08_ Belews Lake
RCW Cooler mgd
Stormwater
Coal Yard
Sumps 0.7 mgd
Power House 3.85 Yard Holding 4.15 mgd
Sump mgd Sump
Condenser Outfall
Feedwater 006 Ash Basin
0.03 mgd
Chemical
Holding Pond
L_....=
0.019 mgd
0.44 mgd
West Holding
Pump Stormwater
Outfall
003 -* Dan River
7.7 mgd

Belews Creek Steam Station, Stokes County
NPDES Permit #NC0024406
Page 2 of 10
General Information
Belews Creek (BC) Steam Station is a coal-fired electric generating plant operated by Duke Energy
Corporation. BC is located on Belews Lake at NC County Road 1908 approximately eight miles
northeast of Walnut Cove, NC in Stokes County.
A schematic flow diagram of water use, treatment, and discharge is attached. A brief discussion of
the individual waste streams follows.
OUTFALL 001 — CONDENSER COOLING WATER (CCWJ
Raw water from Belews Lake is passed through condensers and auxiliary equipment on a..'once-
through" basis to cool equipment and condense exhaust steam from the turbines. Cooling water
passes through a network of tubes in the condenser and selected heat exchangers (e.g., turbine lube
oil coolers, condensate coolers, and miscellaneous closed system coolers). This raw water in the
condenser tubes absorbs heat from a closed system of highly purified exhaust steam from the
turbines and converts it back to water. The condensed exhaust steam is returned to the boilers and
recycled in this loop a number of times. The raw cooling water is returned to the lake. No chemicals
are added and only heat rejected from the condensers and auxiliary equipment is absorbed, hence
the term 'once through, non -contact cooling water" is applied.
The condensers at BC are cleaned mechanically. Normally, amertap balls clean the tubes on a
continuous basis while the plant is operating. Periodically, metal scrapers, plastic scrapers or rubber
plugs are forced through the tubes to rid them of scale or other deposits.
Each unit at BC has four condenser cooling water (CCW) pumps. Pump capacities are listed in the
table below. Normal plant operation of the CCW pumps is based on intake and discharge
temperatures and unit load. The maximum pumping capacity is 1459 mgd and the average CCW
flow is 1300 mgd. To avoid a system trip that would suddenly reduce the discharge flow at outfall
001, each unit is on an independent system. This practice leads to higher reliability factor for the
units and protection of aquatic life taking refuge in the discharge canal during cold weather.
yF a 'n ''k�.✓`
,:ii
No. of Pumps
In Operation
F..R : �. #X :d.R t f
,. �.. ..:..n a
Total Flow
(gpm)
fx 1 S"^` „i, ¢ .,�
.+......o....exw..zw .. � u
Intake Temperature
(°F)
1
184,000
2
333,000
<61
3
444,000
61-69
4
506,000
>69

Belews Creek Steam Station, Stokes County
NPDES Permit #NC0024406
Page 3 of 10
Intake Screen Backwash
Each unit has 4 stationary intake screens (18 ft x 23 ft) which are removed for cleaning. The intake
screens are backwashed as needed at a rate of 500 gpm for approximately five minutes each. The
total volume of water used is 0.02 mgd. This intake screen backwash is discharged back into the
station intake. The debris is collected within a cleaning basin and consists mainly of twigs, leaves,
and other material indigenous to Belews Lake. The collected debris is removed and composted.
Recirculated Cooling Water (RCW) Coolers
Depending on the temperature of the raw lake water and the operation of BC, once through non -
contact condenser cooling water is passed through the RCW coolers to maintain the closed loop
cooling water within the RCW system at <95°F. The RCW system supplies cooling water to various
equipment and is composed of a storage tank, three 50% capacity RCW pumps, two 100% capacity
heat exchangers (RCW coolers), and associated piping and valves for the two units. Recirculated
cooling water is supplied from the CCW system to the RCW storage tank (capacity of 19,000 gallons)
and makeup water is added, as required per tank level and temperature controls. _
The maximum flow of CCW through each of the two RCW coolers is 5360 gpm or 7.72 mgd. Non -
contact cooling water discharged from the RCW coolers combines with the condenser cooling water
and is discharged from outfall 001.
Hydrogen and Oil Coolers
Once through non -contact cooling water is supplied from the Low Pressure Service Water System
that draws water from the CCW system to hydrogen and oil coolers. The system consists of two High
Pressure Generator Hydrogen Coolers (maximum combined flow of 3,990 gpm), four Low Pressure
Generator Hydrogen Coolers (maximum combined flow of 3520 gpm), and two Turbine Lube Oil
Coolers (maximum combined flow of 7400 gpm) for each unit. A maximum of 43.0 mgd of cooling
water can flow through these coolers when both BC units are operated at full load. Discharge from
these coolers combines with the condenser cooling water flow and discharged at outfall 001.
Station Equipment Cooling Water
Once through non -contact cooling water is supplied from the Low and High Pressure Service Water
System to the bearings of the induced draft (ID) fans to remove excess heat. No chemicals are
added to the once through raw lake water discharged to Belews Lake. The rate of flow through the
control equipment is approximately 0.86 mgd when both BC units are operated at full load. This
effluent also includes chiller once through water.
OUTFALL 003 - ASH BASIN
The ash basin accommodates flows from the power house sumps, yard holding sump, ash sluice
lines, the chemical holding pond, the coal yard sumps, and rainfall run-off from the watershed of the
basin. Seepage from the toe -drains at the base of the ash basin dikes goes to the Dan River. The
toe -drains are needed to allow, as designed, seepage to occur from the earthen dikes. This feature
ensures the structural integrity of the dikes.

Belews Creek Steam Station, Stokes County
NPDES Permit #NC0024406
Page 4 of 10
Yard Holding Sump
Waste can accumulate in the yard holding sump from the power house sumps, the condenser
feedwater system, and the coal yard sumps. During a boiler cleaning, these wastes accumulate in
the yard holding sump and are then pumped to the chemical holding pond (Outfall oo6).
Power House Sumps
The Power House Sumps discharge to the yard holding sump and include wastewater from water
treatment equipment, floor wash water, equipment cooling water, and miscellaneous leaks. The
Power House Sump receives wastes from the following systems:
• Water Treatment System
The water treatment system consists of one retention tank, two pressure filters (diatomaceous
earth), two activated carbon filters, and one set of makeup demineralizers. The pressure filters
each have a capacity of 500 gpm. Filters are backwashed weekly with`approximately 220 lbs of
diatomaceous earth going to Station sumps that discharge to the ash basin.
Make up demineralizers are operated in sequence (one cell at a time). Regeneration of these cells
is required approximately every other day. Each regeneration requires 60 gallons of 660 Be sulfuric
acid and 300 gallons of 50% sodium hydroxide. An average dilute waste chemical and rinse flow of
0.17 mgd is realized (for one hour per regeneration). The diluted acid and caustic are discharged
to the yard holding sump and then pumped to the ash basin. The useful life of the resin varies and
when replacement is needed the spent resin is sluiced to the ash basin.
• Condensate Feedwater System
The condensate feedwater system provides continuous flow-through boiler feedwater to BC
supercritical pressure boilers. Condensate polishing demineralizers of the powdered resin type are
used to filter feedwater. The mixed anion -cation powdered resin provides filtering and ion
exchange. Spent resins and associated wastes are pumped to the ash basin for treatment and
disposal.
• Evaporative Losses, Soot Blowing
Exhaust steam from the turbine is used periodically to blow soot off the outside of the boiler tubes.
Thus, some of the condensate feedwater is evaporated in the boiler.
• Turbine and Boiler Room Drain System
Turbine and boiler room drains receive flow from once through non -contact cooling water of the
Station air conditioning system, the fire protection system, washdown, and miscellaneous Station
uses:
Station Air Conditioning
Once through non -contact cooling water is supplied from the Low Pressure Service Water
System to cool the Station air conditioning equipment. A maximum combined flow of 3.46 mgd
of cooling water can flow through two chiller units. No chemicals are added to the once
through raw lake water. The effluent drains to the Station sumps where it is pumped to the ash
basin.

Belews Creek Steam Station, Stokes County
NPDES Permit #NC0024406
Page 5 of 10
• Fire Protection, Washdown, and Miscellaneous Station uses
The fire protection system, washdown, and miscellaneous station uses from closed system
drainage, cleaning, and testing can contain:
Corrosion inhibitors, (e.g., Calgon CS, Biocides, Calgon H-300 and H-510)
Laboratory wastes
Cleanings (e.g., small heat exchangers)
Dispersant (e.g., polyacrylamide)
Wetting agent (e.g., sodium lauryl sulfate)
Detergent (e.g., tri -sodium phosphate)
Leak testing (e.g., disodium fluorescing dye)
Miscellaneous system leakage (pump packings and seals, valve seals, pipe connections)
Moisture separators on air compressor precipitators
Floor wash water
Emergency fire fighting water and foaming agent
Ash sluice system overflow
Low Volume Wastewater.
Groundwater (GW) Remediation
A GW remediation is presently underway to recover free petroleum product that leaked from a
underground storage tank. A total fluids recovery system is used to recover contaminated
groundwater and free,product from the site. Remediation system equipment is used to remove the
petroleum from the recovered groundwater, and the reclaimed petroleum is transported off-site for
treatment while the treated wastewater is discharged to the ash basin via the power house sump. A
maximum flow rate of approximately 0.03 mgd is discharged to the ash basin from the groundwater
remediation system.
Ash Sluice
Electrostatic precipitators are used to remove fly ash from the stack gases. The ash is treated in the
flue gas ductwork with S03 conditioning to improve removal efficiency. Typically, the dry -fly ash
captured in these precipitators is collected in temporary storage silos for subsequent disposal in a
permitted on-site landfill or for recycling in off-site ash utilization projects. If the system that collects
the dry -fly ash is not operating, then the fly ash can be sluiced to the ash basin. Bottom ash from the
boilers is usually water sluiced to holding cells for recycling activities per reuse permit #WQ0007211.
In the case of equipment failure or immediately following an outage, service water is used to sluice
the bottom ash to the ash basin.
Electrostatic precipitators are normally cleaned by mechanically rapping the wires and the plates
inside the precipitator. Before major precipitator work is performed they are cleaned by a wash
down. The wash water is pumped to the ash basin from the yard drain sumps.
Additional air pollution control devices may potentially be installed. Use of this equipment may entail
use of or production of: calcium sulfite, ammonia, ammonia hydroxide, vanadium pentoxide, calcium
carbonate and sulfur.

Belews Creek Steam Station, Stokes County
NPDES Permit #NC0024406
Page 6 of 10
Coal Yard Sumps
The coal yard covers approximately 51.5 acres. The average rainfall run-off is 0.08 mgd. This run-
off is based on 40 inches of rain per year with 50% run-off. During winter, freeze conditioning agents
(i.e., diethylene glycol) maybe added to coal by a vendor prior to shipment or sprayed on the coal pile
to prevent freezing. A small percentage of a coal binder may potentially be added to the coal in the
future. An on-site coal binder production facility is also being contemplated. Based on an application
rate of two pints of 50 ppm diethylene glycol per ton of coal and 10,000 tons of coal per train load,
the addition of freezing agents will not significantly alter the coal pile run-off wastestream and the
discharge of the ash basin at outfall 003.
Most of the coal yard drains into the ash basin near the point of ash influent. Floor washwater from
equipment in the coal handling area and the remaining drainage from the coal yard flows to the coal
yard sumps where it is then pumped to the ash basin.
Ash Basin Run -Off
Non -point sources of storm water to the ash basin include coal pile runoff and landfill. Based on forty
inches of rain per year with fifty percent run-off, and the watershed area of the ash basin, the yearly
average rainfall run-off to the ash basin is 0.47 mgd.
OUTFALL 006
Boiler and Filter Cleaning Wastes
BC has two supercritical boilers that are cleaned on an as needed basis. Tube inspections are done
during outages to determine when cleaning is needed. The chemical cleaning wastes are pumped to
the chemical holding pond. After proper treatment, the pond effluent is discharged into the ash basin
at a controlled rate to provide further treatment. The chemicals and approximate amounts for one
boiler cleaning is as follows:
Boiler Cleaning Chemicals Amount Per Unit
Hydroxyacetic acid 22,400 lbs
Formic Acid* 11,200 lbs
Ammonium Hydroxide*(260Be') 250 gal
Ammonium Bifluoride* 2,800 lbs
Hydrazine (54.4%)* 150 gal
Corrosion Inhibitor* (Proprietary) 500 lbs
* These chemicals are present in amounts greater than the reportable quantity as identified under
CERCLA. If a spill of any of these chemicals were to occur, in most cases, the spill would be routed
to the ash basin for treatment. These chemicals are being identified to qualify for the spill reporting
exemption provided under 40 CFR 117 and CERCLA.
*
Hazardous substance as listed in 40 CFR 302.4

Belews Creek Steam Station, Stokes County
NPDES Permit #NC0024406
Page 7 of 10
Two auxiliary boilers are cleaned with an alkaline boilout. These cleanings are done on an infrequent
basis. The alkaline cleaning wastes are pumped to the ash basin. Chemicals and approximate
quantities for one auxiliary boiler alkaline boilout is listed below:
ALKALINE BOILOUTS (ONLY AFTER MAJOR BOILER TUBE WORK
Chemical Amount
Soda Ash 300 Ib
Triton X-100 Detergent (0.05%) 2 gal
Antifoam Agent (0.025%) 1.5 gal
The condensate polisher filters and filtered water system filter are cleaned with citric acid and sodium
hydrosulfite on an as needed basis. The chemical and approximate quantity used per year for this
cleaning are listed below:
Chemical Amount
Citric acid 600 lbs
Sodium Hydrosulfite 15,000 lbs
Sanitary Spray Irrigation System
Sanitary waste is pumped to a spray irrigation system per permit #WQ0005873. The sanitary waste
from the plant receives primary treatment in a 600,000 gallon capacity aerated lagoon. Drawoffs
from the lagoon discharge to a concrete chlorine contact chamber. To polish the effluent, the spray
irrigation system routes a circuit of water treated with chlorine over approximately seven acres of land
divided into four vegetated plots, each with an area of 270 square feet. The yearly loading per plot
averaged approximately 6.26 inches/acre.
Storm Water
Non -point sources of storm water to the yard drainage system is based on forty inches of rain per
year with fifty percent run-off, and the yard watershed area, the yearly average rainfall run-off to
Belews Lake is 0.08 mgd.
• Yard Drainage to Intake Canal
• Yard Drainage to Discharge Canal.
BC has several storm water outfalls that discharge to the Dan River or Belews Lake. BC was
included in the group application submitted to the Environmental Protection Agency in March 1991.
Spill Prevention
BC has one large above ground oil storage tank (260,000 gals). A dirt dike designed to contain the
entire contents of the tank in the event of an accidental rupture surrounds this tank. All oil storage
facilities are covered under the BC Spill Prevention Control and Countermeasure Plan.

N
Belews Creek Steam Station, Stokes County
NPDES Permit #NC0024406
Page 8 of 10
Hazardous and Toxic Substances Table 2c- 3:
At Belews Creek Steam Station, the potential for toxic and hazardous substances being discharged
is very low. In reference to Item V -D of Form 2-C, the substances identified under Table 2c-3 that.
may be in the discharge are as follows:
Acetaldehyde, Asbestos, Benzoyl Chloride, Butyl Acetate, Cresol, Cyclohexane, Cyclohexanone,
Epichlorohydrin, Formaldehyde, Furfural, Monoethyamine, Naphthenic Acid, Pyethrins, Stryrene,
Triethanolamine, Vanadium, Vinyl Acetate, Xylene, and Zirconimum and also during the course of the
year products such as commercial cleaners and laboratory reagents may be purchased which
contain very low levels of a substance found in Table 2c-3. It is not anticipated that these products
will impact the toxicity limits of the ash basin since these concentrations are extremely low.
40 CFR 117 and CERCLA Hazardous Substances:
The table below identifies hazardous substances located on-site that may be released to the ash
basin during a spill in quantities equal to or greater than the reportable quantity (RQ) levels as
referenced in 40 CFR 117, 302 and 355. This list is being provided in order to qualify for the spill
reportability exemption provided under 40 CFR 117 and the Comprehensive Environmental
Response Compensation and Liability Act (CERCLA). These values below represent the maximum
quantities on-site that could be released at one time and sent to the ash basin. They do not reflect
quantities that are discharged through typical use.
CHEMICAL AMOUNT (Ibs) SOURCE
Ammonia 7,421 General Site
Benzene 834 Gasoline Tank
Dibutyl Phthalate 22 Warehouse
Mercuric Nitrate 10 Warehouse
Methylenebisphenyl isocyanate 6,398 Flyash Dome
Sodium 10 Warehouse
Sodium Dodecylbenzenesulfonate 3,803 Coal Handling Area
Sodium Hydroxide 25,520 Water Treatment Room
Sodium Nitrite 924 Ash Landfill
Sulfuric Acid 61,228 Water Treatment Room

Belews Creek Steam Station, Stokes County
NPDES Permit #NC0024406
Page 9 of 10
Belews Lake Balanced and Indigenous Populations
The attached report entitled, "Assessment of Balanced Indigenous Populations in Belews Lake Near
Belews Creek Steam Station", indicates balanced and indigenous populations are recovering.
Recovery of populations in Belews Lake is associated with a decrease of selenium bioaccumulation
in populations of Belews Lake, following installation of a system to collect and landfill dry -fly ash in
1984 and reroute of the ash basin discharge from Belews Lake to the Dan River in 1985. The fish
eating advisory on Belews Lake was recently lifted by the North Carolina Department of Environment,
Health and Natural Resources. Duke Power continues to maintain an environmental monitoring
program on Belews Lake and the Dan River to assess populations. Annual summary reports of
environmental monitoring of the Dan River per Part III.S of the present NPDES permit indicates that
reroute of the ash basin discharge from Belews Lake to the Dan River has had no adverse impact on
the balanced and indigenous populations in the Dan River.
Duke Power Company's operating experience during the past five years under the thermal limitations
imposed in NPDES Permit No. NC#0024406 substantiates for Belews Creek Steam Station that the
"thermal component of the discharge assures the protection and propagation of shellfish, fish and
wildlife in and on the receiving body of water."
Per Part III.Q of the present permit, Duke Energy requests that the thermal monitoring and reporting
requirements for lake samples be reduced to monitoring only at the present site downstream of the
Dam.
Ash Basin Capacity
Part III Section R of the existing NPDES permit for BC requires the permittee to provide and maintain
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.
Determination of Wet Weather Detention Volume: Wet Weather Detention Volume is the sum of the
runoff accumulated in the ash basin which results from a 10 -yr 24 -hr storm (assuming 100% runoff)
plus the maximum 24 -hr dry weather waste stream which discharges to the Ash Basin (refer to
NPDES Permit NC0024406).
I. Estimate Runoff to the Ash Basin from a 10 -yr 24 -hr storm:
1. Natural Drainage Area of Ash Basin = 655.0 Acres
Station Yard Drainage Area Pumped to Ash Basin = 87.6 Acres
Total = 742.6 Acres
2. Precipitation from 10 -yr 24 -hr storm = 5.1 Inches
3. Total Stormwater Runoff to Ash Basin = 315.61 Acre-feet
(Assuming 100% runoff)

IV
Belews Creek Steam Station, Stokes County
NPDES Permit #NC0024406
Page 10 of 10
Estimated Maximum 24 -hr Dry Weather Waste Stream Discharging to Ash Basin:
1. Maximum recorded Ash Basin Discharge =
2. Increase maximum daily discharge by 10% for
conservatism and convert units to acre-feet =
Wet Weather Detention Volume:
Sum of Parts I. and II. _
17,900,000 Gallons/day
60.42 Acre-feet
376.03 Acre-feet
Estimated quantity of solids (ash) to be discharged to the Ash Basin through 2006. (Refer to
Coal Consumption Data and ENPRO EN9706F1 Output - Base Fuel Consumption Forecast.)
Time Period
Esti. Total
Ash
Production
(1000's
tons)
Esti. Fly Ash
Utilization
(1000's tons)
Esti. Bottom
Ash
Utilization
(1000's tons)
Fly Ash
Disposal to
Landfill
(1000's
tons)
Esti.Total
Ash Sluiced
to Basin
(1000's tons)
Esti.Total Ash
Sluiced to Basin
(acre -ft)
11/93 - 12/93
83.7
42.67
2.21
32.72
6.10
5.10
1994
495.10
290.76
18.86
154.83
30.65
25.59
1995
426.80
317.64
17.41
28.73
63.02
52.61
1996
466.10
361.50
8.72
41.29
54.59
45.57
1997
544.78
369.38
30.85
108.32
36.23
30.24
1998
563.94
393.41
22.08
82.65
65.80
54.93
1999
594.73
384.05
4.20
120.75
85.73
71.57
2000
517.42
336.73
12.57
158.21
9.91
8.27
1/01 -6/01
294.75
143.15
6.13
100.69
44.78
37.38
7/01-12/01
208.36
168.77
15.00
18.75
5.84
4.88
2002
422.33
375.00
30.00
5.10
12.23
10.21
2003
534.30
375.00
30.00
105.87
23.43
19.56
2004
544.50
375.00
30.00
115.05
24.45
20.41
2005
544.50
375.00
30.00
115.05
24.45
20.41
2006
544.50
375.00
30.00
115.05
24.45
20.41
2007
544.50
375.00
30.00
115.05
24.45
20.41
Total
7330.31
5058.06
318.03
1418.11
536.11
447.54
• Calculation assumes an in-place ash density of 55 lbs. per cubic foot.
• ** Assumes 25% of yearly projection is consumed in January and February.
Estimated Total Storage Volume Required for through 2007:
Wet Weather Detention Volume = 376.0 Acre-feet
Estimated Solids to Ash Basin = 447.5 Acre-feet
Total = 823.6 Acre-feet
Result: Available Storage based on most recent basin survey dated 11/3/93
and pond level at elevation 752+0 = 3876 Acre-feet
Required Storage Volume through 2007: 823.6 Acre-feet
Based on these calculations, there is sufficient capacity in the ash basin to provide the retention volume
specified in the permit through the year 2007.

c WATF
I�
Michael F. Easley
�U QG D. Governor
[51William1P G. Ross, Jr., Secretary
Department of Environment and Natural Resources
O C / Kerr T. Stevens, Director
' Division of Water Quality
n C5,1J l!
January 29, 2001
Mr. Michael A. Ruhe
Manager, Water Compliance
Duke Power - 00— 0\4qgo
1n 339 Hagers Ferry Road
Huntersville, N C 28078-7929 e 5'.1
� x01l
v (Z- biet')
Dear Mr. Ruhe: � 4m1 'Dw�
I
We have received the McGuire Nuclear Station, Lake Norman: 1999 Summary Report, Environmental Monitoring
Program as required by NPDES permit, and the Belews Creek Steam Station, 1999 Dan River Summary Report as
required by NPDES permit. We have no comments on the Lake Norman report as conditions appear similar to prior
years.
In the Belews Creek report, Dave Lenat comments that the between -year changes in benthic macroinvertebrate data
should be interpreted in relation to flow. Much of the variation can probably be explained in this way, otherwise the low
number of EPT taxa collected at both locations is alarming.
Concern is also raised by the higher selenium values found in the tissue of sunfish at locations 720 and 705 downstream
of the plant, and by the continuedincrease of these values since 1997, regardless of the fact that they are below the.
levels found during the failure of the fishery in Belews Lake in the 1970s. The same increasing trend is not found at
location 710 above the plant. Our concern is further intensified by a similar pattern in' elenium concentrations of the
invertebrates, where the difference in upstream and downstream concentrations was much greater than had been found
previously. As noted in your report, such concentrations have been reported by some in the scientific literature as cause
for concern.
DWQ would recommend a meeting between DWQ and your staff to discuss possible reasons for the downstream
increase, unless the 2000 data is available and it does .not show the same increasing trend. Please contact Mark Hale
(919-733-6946) to set up a meeting or to provide him the 2000 fish tissue and invertebrate data.
c
Please also note that pages 3-1 through 3-6 of the Belews Creek report were duplicated in all three copies.
Please contact Jimmie Overton (919-733-9960) if you have other questions about these comments or would like to
discuss further the need to meet about the Belews Creek Steam Station discharge to the Dan River.
Sincerely,
Coleen Sullins U
Water Quality Section Chief
cc: Mark Haled FEB ' 5 2001
Jimmie Overton
Rex Gleason, MRO w/ Lake Norman rpt
Larry Coble, WSRO w/ Dan River rpt DEi R _ 01 -ER QU6,1.11Y
SOII'R E� BRANCH
NA
`JTDE".:{
Customer Service
1 800 623-7748
Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone]

i
Duke
Power
A Dvk, E-W C mpa ry
- October 29, 1999
NC Dept of Environment and Natural Resources
Division of Water Quality
Attention: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Duke Power
Group Environment, Health & Safety
13339 Hagers Ferry Road
Huntersville, NC 28078-7929
U
NOV
��SRR �uA�iGH
Po��RCE
"sou aR
Subject: Duke Power Company
NPDES Discharge Monitoring Report for:
Allen Steam Station - NC0004979 - Gaston County
Belews Creek Steam Station - NC0024406 - Stokes County
Buck Steam Station - NC0004774 - Rowan County
Cliffside Steam Station - NC0005088 - Rutherford County
Dan River Steam Station - NC0003468 - Rockingham County
Lincoln Combustion Turbine Station - NC0080781 - Lincoln County
Marshall Steep Station - NC0004987 - Catawba County
McGuire Nuclear Station - NC0024392 - Mecklenburg County
Riverbend Steam Station - NC0004961 - Gaston County
Record No. NC -004992
CERTIFIED: Z 335 554 736
In accordance with Part II, C(2) of the above referenced NPDES permits, duplicate copies of the monthly
monitoring report for September 1999 are attached.
At Belews Creek Steam Station, the six-month monitoring requirement of Toluene and Benzene has been
completed and concentrations were below the detection level. Therefore, monitoring will be discontinued
per agreement with NCDENR.
e All values reported on the attached reports are dependent on the accuracy of approved analytical methods
`l,° used to measure parameters.
Please direct any correspondence or questions concerning the subject facility NPDES Program to Angela
M. Grooms at [phone].
Very truly yours,
Angela M. Grooms
Manager, Water Protection
AMG/phs
Attachments

EFFLUENT Page 2 of 2
WOES PERMIT No. N00024406 DISCHARGE NO. 003 MONTH September YEAR 1999
FACILITY NAME Belews Creek Steam Station CLASS 11 COUNTY Stokes
OPERATOR IN RESPONSIBLE CHARGE (ORC) Randolph W. Price GRADE 11 PHONE [phone]
CERTIFIED LABORATORIES (1) Duke Power Env. Services - 248 (2)
WO OPJGINAL nd ONE COPY to:
ATTN: CENTR AL FILES
DMSION OF WATER QUALITY
DERNR
P.0 BOX 29M
RALEIGH*. NC 27626-0535
:j
�13
®E
Comp- (C) I Grab (G) A
Monthly Limit I I I I
Facility Status: (Please check one of the following) DEM Form MR -1 MM)
All monitoring data and sampling frequencies meet permit requirements Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements Normmpifiant See Aftschmsent
ry certify, oder penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified
personnel property gather and evaluate the Informaboin submitted. Based on my Inquiry of the person or persons who manage the system, or those persons directly responsible for gathering
the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false
infonnation, including the possibility of lines and Imprisonment for knowing violations."
Angela M. Grooms AI�"Aov�— IOLL+
Peffnittee (Please print or type) Signature R Permittee" Date
13339 Hagers Ferry Road (MG03A5) Huntersville, NC 28078-7929 704-8755205 2128/02
Permittee Address Phone Number Permit Exp. Date
*ORC must visit facility and document visitation of facility as required per 15A NCAC 8A .0202 (b) (5) (B).
—if signed by otter than the Peffnidee, delegation of signatory authority must be on file with the state per I SA NCAC 28.0506(b)(2)(D).
The monthly average for fecal coliform is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's Permit for reporting data.

Table 2. Water Quality Data -for'Dan River Sampling Locations
Sampled November 28 & 29, 1994
LOCATION, COND. pH ALKALINITY
NOTE: SHADED AREAS INDICATES DATA NOT COLLECTED OR AVAILABLE
Page 1
SO4 �,�Se Cdj Cu Pb Zn
1UNITS
us/ 11 ueq/Lmg/L 1 Ug/L] Ug/L
CM
SURFACE WATER DATA
X
LOCATION
1011111.11.11
DRSS INTAKE
< 0
207 7.5 530 1.00 < 0.10
2.00
REECE'S LANDING
196 7.4 528 18.4 0.36 < 1.00
NEAR MW9
-
179, 7.5 488 17.8 0.49 < 1.00 < 1.00 < '0.10
< '0.10
2.10 < 2.00 11
NEAR MW10
168 7.4 412 14.7 0.42 < 1.00 < 1.00 < 0.10
1.80 < 2.00 8
NEAR MWI 1
157 7.5 388 14.4 0.77 < 1.00 < 1.00 0.20,
3. 2.80 35
ASH BASIN CONFLUENCE
165 7.4 492 15.2 0.4 < 1.00
IFIELDCREST
171 7.5 654 14.5 0.38 1.00
GROUND -WATER DATA
M I
M1N9
517 6 16 0.24 < 1.00 3.80 0.31
0.80 2.00
MW10
29 5.2 0.15 1.00 1.70 < 0.10
5.10 < 2.00
Mwi 1
E47
23 4.7 36 2.89 < 1.00 1.00 < 0.10
6.30 8.50
NOTE: SHADED AREAS INDICATES DATA NOT COLLECTED OR AVAILABLE
Page 1