NC0024406_Issuance of Permit_19980115

Stat'z of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
Mr. Maurice D. McIntosh, V.P.
Fossil/Hydrogeneration Dept.
Duke Power Company
NCSR 1908
Walnut Cove, North Carolina 27052
Dear Mr. McIntosh:
January 15, 1998
Subject: NPDES Permit Issuance
Permit No. NCO024406
Belews Creek Steam Station
Stokes County
In accordance with your application for discharge permit received on August 6, 1996 by the Division, we
are forwarding herewith the subject permit to discharge under the subject state - NPDES 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 December 6, 1983 and
as subsequently amended.
The summarized changes to the above -referenced permit are:
Outfall 001
• Changed the upstream monitoring to either location (site 405 OR 419) instead of both and removed the
upstream temperature limit per the facility's request. Also, deletion of monitoring sites: 423.31, 423.32,
423.33, 419.3 1, and 419.32; and water samples reduced from profile to surface and bottom samples.
• Added a monthly average limit of 32°C (89.6°F) at the downstream monitoring point.
• Added continuous monitoring of flow and temperature at effluent. Per 2B .0500 regulations for SIC
code 4911, continuous cooling water effluent monitoring of flow and temperature is required.
Outfall 003
• Removedthe Barium monitoring requirement per past analysis results.
• Changed the tonicity test effluent concentration from 33% to :1.9% as a result of an updated USGS flow
profile of the Roanoke River basin.
• Removed Annual Pollutant Analysis test requirement. Data from the last permit cycle is sufficient to
characterize the discharge. _
• Changed limits for Oil & Grease and Total Suspended Solids to mass limits from concentration limits per
40 CFR 423.
Outfall 005
• Removed this effluent page. This outfall is no longer used.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

Permit No. NC0024406
Permit Issuance
Belews Creek Steam Station
January 15, 1998
Page 2
Special Conditions
• Moved Outfall 006 internal discharge condition to Special Condition F; this condition was listed on
the 006 limits page which has been removed.
• Updated the toxicity test language for outfall 003 to the most current version, November 1995.
• Removed the APAM test requirement. This is no longer required of dischargers.
• Added boiler cleaning procedures and Best Management Practices as Special Condition R. This is
a condition in the Dan River Steam Station, Permit #NC0003468, that Darryl Williams, EPA,
wanted incorporated into this permit.
• Removed biocide condition. The facility uses once through, non -contact cooling water and does not
add any biocides.
• Removed the Acute toxicity test language for abandoned outfall 005.
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,
Post Office Drawer 27447, Raleigh, North Carolina 27611-7447. Unless such demand is made, this
decision shall be final and binding.
Please take notice that this permit is not transferable except after notice to the Division of Water
Quality. Part II, EA. addresses the requirements to be followed in case of change in ownership or control
of this discharge. The Division of Water Quality 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 Mary Cabe at telephone number
[phone], extension 518.
Sincerely,
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P. E.
cc: Central Files
Mr. Roosevelt Childress/EPA
Winston-Salem Regional Office/Water Quality Section
NPDES Unit .?
Mr. Ron Lewis, Duke Power Company
Mail Code = MG03A5
13339 Hagars Ferry Road
Huntersville, NC 28078-7929

Permit No. NCO024406
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 Power Company
is hereby authorized to discharge wastewater from a facility located at
Belews Creek Steam Station
NCSR 1908
Walnut Cove
Stokes County
to receiving waters designated as West Belews Creek/Belews Lake (outfall 001) 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 February 1, 1998.
This permit and authorization to discharge shall expire at midnight on February 28, 2002.
Signed this day January 15, 1998.
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E., Director'
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0024406
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1. Continue to operate wastewater treatment facilities consisting of a once -through
and auxiliary cooling water discharge (outfall 001), an ash basin discharge (outfall
003) and a discharge consisting of low-volume waste and metal cleaning waste (outfall
006) from facilities located at Belews Creek Steam Station, on NCSR 1908, Walnut
Cove, Stokes County (See Part III of this Permit), and
2. Discharge from said treatment works at the location specified on the attached map
into Wast Belews Creek/Belews Lake (outfall 001) and into the Dan River (outfall
003), classified C and WS -IV waters respectively in the Roanoke River Basin.

J 0`1
i � N\ l -,j t �, 111
BELEWS LAKE
OUTFALL 003 , (EL.725)
.,� DISCHARGE P
�..
TAILINGS POND
": ✓��`—� BELEWS CREEK !�
STEAM STATION
y1
_•, �l -, '^1L)� 631 L�
SCALE 1:24 000
ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT-DUTY ROAD, HARD OR
HARD SURFACE IMPROVEDSURFACE
0 1 MILE
. _ ............._ _......:._...
SECONDARY HIGHWAY
HARD SURFACE C=3MM= UNIMPROVED ROAD
0 7000 FEET
1 0 1 KILOMETER
Latitude 36018'22" Longitude 78-48'19"
Map # B18SE Sub -basin 3-02-01
CONTOUR INTERVAL 20 FEET
Stream Class C & WS -IV
Discharge Class 14 68 69 70
West Belews Creek/Belews Lake
QUADIOCATION Duke Power Company
■
NC0024406
Receiving Stream a Dan River
Stokes County
Design Q Variable Permit expires 2 28 02
Belews Creek Steam Station

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NCO024406
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall
serial number 001, once through and auxiliary cooling water into West Belews Creek/Belews Lake. Such discharges shall be limited and
monitored by the permittee as specified below:
Effluent Characteristics Discharge Limitations
Lbs/dav Units (specify)
Mon. Avg. Daily Max Mon. Ava. Daily Max.
Flow
Temperature IC(IF)
Temperature OC(IF) ** 32 (89.6)
Temperature OC(IF)
Monitoring
Requirements
Measurement
Sample *Sample
Frequency
Type Location
Continuous
Pump Logs E
Daily
Recorder/Grab U
Daily
Recorder/Grab D
Continuous
Recorder/Grab E
* Sample locations: E - Effluent, U - Upstream at Southern Railroad crossing of Belews Creek OR East Belews Creek (site 405 OR site 419),
D - Downstream at the discharge from the Dam. Upstream temperature samples are to be measured one foot below the surface.
** In no case should the ambient temperature exceed 32°C (89.6°F) as a result of the 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 and auxiliary cooling water shall not be allowed at this facility. Should Duke Power wish to chlorinate its
once through 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.

A. O. EFFLUENT LIMITATIONS AND MONI'T'ORING REQUIREMENTS FINAL Permit No. NCO024406
During the period beginning on the effective date of the permit and lasllnCg, Until expirallon, the Permittcc is authorized to discharge aloin outfall
sena) number 003 Ash Setting Pond into the Dan River. Such discharges shall be limited and monitored by the pern-i9tee as specified below:
Effluent Characteristics
Discharge _Limitations
Monitoring Requirements
l=bs/day Units (specify)
Measurement_
Sample
*Sample
Mon. Avg, Daily Max Mon. Avq. Daily Max.
Frequency
11 P-
Location
Flow
Weekly
Pump Logs**
E
Oil and Grease
989 1969
Monthly
Grab
E
Total Suspended Solids
1978 4924
Monthly
Grab
E
Total Arsenic
Monthly
Grab
E
Total Selenium
23.0 p g/I
2/Month
Grab
E
Total Nitrogen (NO2+NO3+TKN)
Quarterly
Grab
E
Total Phosphorus
Quarterly
Grab
E
Sulfates
Monthly
Grab
E
Fluoride
Monthly
Grab
E
Total Copper
1.0 mg/I
Monthly
'Grab
E
Total Iron
1.0 mg/I
Monthly
Grab
E
Chronic Toxicity`*"
Quarterly
Grab
E
:': Sample locations: E - Effluent
,':* Or Similar Readings
-i:*-'z Chronic Toxicity (Ceriodaphnia) P/F at 19%, August, November, February, May; See Part III, Condition N.
The coal pile runoff and low vofume waste 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.

Part III Permit No. NC0024406
E. There shall be no discharge of polychlorinated biphenyl compounds such as those commonly
used for transformer fluid.
F. Outfall 006 - The monitoring requirements for this internal discharge have been relocated to the
actual discharge location (outfall 003). 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.
G. Continued intake screen backwash and non -contact cooling water are permitted without
limitations or monitoring requirements.
H. Nothing contained in this permit shall be constructed as a waiver by permittee or any right to a
hearing it may have pursuant to State or Federal laws or regulations.
I. 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.
Low volume wastes sources include, but are not limited to: wastewaters from wet scrubber air
pollution control systems, ion exchange water treatment system, water treatment evaporator
blowdown, laboratory and sampling streams, boiler blowdown, floor drains, cooling tower basin
cleaning wastes. and recirculating house service water systems. Sanitary and air conditioning
wastes are not included.
J. The term "metal cleaning waste" means any wastewater resulting from cleaning (with or
without chemical cleaning compounds) any metal process equipment including, but not limited to,
boiler tube cleaning, boiler fireside cleaning, and air preheater cleaning. Metals cleaning will be
conducted according to Duke Power's approved equivalency demonstration.
K. The term "chemical metal cleaning waste" means any wastewater resulting from the cleaning of
any metal process equipment with chemical compounds, including, but not limited to , boiler tube
cleaning.
L. It has been determined from information submitted that the plans and procedures in place at
Belews Creek Steam Station are equivalent to that of BMP.
M. 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 waters
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 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.

-N. CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised November 1995,
or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is 19.0% (defined as treatment two in the procedure document). The permit
holder shall perform quarterly monitoring using this procedure to establish compliance with the
permit condition. 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.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR -.1) for the month in which it was performed, using the parameter
code TGP3B. Additionally, DWQ Form AT -1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of Water Quality
4401 Reedy Creek Road
Raleigh, North Carolina 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. 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 any single quarterly monitoring indicate a failure to meet specified limits, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this
monthly test requirement will revert to quarterly in the months specified above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then
monthly monitoring will begin immediately until such time that a single test is passed. Upon
passing, this monthly test requirement will revert to quarterly in the months specified above.
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.
O. 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.

P. Beginning on the effective date of this permit and lasting until expiration, there shall be no
discharge of plant wastes 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. Once per year, the permittee shall determine and report to
the permit issuing authority: (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 requried volume is available with adequate
safety factor to include all solids expected to be deposited in the ponds for the following year.
Present information indicates a needed volume of 338 A -ft in addition to solids which will be
deposited in the ash pond. Any changes 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.
Q. 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. 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 to 99+ percent by treatment in
ash ponds. Because of dilution problems, and the existence of boundry interface layers at the
extremities of the plume, it is difficult to prove beyond doubt that the quantity of iron and copper
discharged 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 wastes 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 measureably increased during the ash pond equivalency demonstration at the Duke
Power Company's Riverbend Steam Station. Belews Creek Steam Station has two supercritical
boilers that are cleaned on an as needed basis determined by inspection of boiler tubes during
outages. When boilers are cleaned, the chemical cleaning and treatment wastes are pumped to a
holding pond. The pond effluent is discharged into the ash basin at a controlled rate to provide
further treatment. When the following conditions are implemented during boiler cleaning
procedures, effective treatment for metals can be obtained at this facility:
1. Large ash basin providing potential reaction volumes in the ratio of 74 to 1.
2. Ash pond pH of no less than 6.5 prior to metal cleaning waste addition.
3. One month or greater retention time in metal cleaning holding pond and four days retention time
in ash pond.
4. After treatment of metal cleaning wastes, if monitoring of basin effluents as required by the
permit reveals discharges outside the limits of the permit, the Permittee will close the basin
discharge, conduct such in -basin sampling as necessary to determine the cause of
nonconformance, will take appropriate corrective actions, and will file a report with NCDEHNR
including all pertinent data.

PERMIT NOTES
NC0024406 Duke Power Belews Ck Steam Station Stokes County
8/6/96 Received application and supplemental info. Facility is requesting a reduction in water,
sediment, and fish tissue sampling and a reduction in temperature monitoring.
SIC = 4911, coal fired electricity generation.
8/14 Requested SR.
8/19 Requested WLA, request #8511.
9/17 Colleen Sullins, Farrell Keough, Paul Clark, Mary Cabe, and David Russell went on a site
visit to facility.
9/19 Wrote letter to ESB, Trish MacPherson, for comments on fish sampling, etc.
9/26 Received SR.
10/8 Sent additional information to Bryn Tracey, ESB, from CF. Called facility, Ron Lewis,
to make sure that we have the latest Dan River Summary Report. [phone]
10/29 Received ESB comments. They concur with the reductions in water, sediment, and fish
tissue sampling.
11/11 Received WLA
11/13 Finished drafting Permit:
11/14 To Dave Goodrich for review.
12/18 Faxed copy of memo from Trish MacPherson to Ron Lewis to see if he has any comments.
1/21 Received EPA comments, Darryl Williams. They want mass limits put in the permit and
testing at outfall 006 to be reinstated.
2/17 Received additional info - Guidance for co -treatment facilities.
Receiving waters:
003 - Dan River WS -IV 8/3/92 22-(19.5) - Changes to WS -IV CA w/in 3 mi
003: Ash settling pond. 006: Metal cleaning waste, discharge to 003.
001 - Belews Lake C 9/1/57 22-27-9-(l) - Changes to B w/in 3 mi
SR says Belews Lake is WS -IV.
002 and 005 abandoned.
002 was domestic waste; it has been changed to a spray irrigation system, 10/92.
005 has been sealed in 1994.
Central Files:
Reviewed all correspondence and permit files.
Reviewed DMR's - Temp is OK. Facility writes down site 406 instead of 405 on DMR,
but Farrell Keough says they do perform the monitoring at 405.

NC0024406 Duke Power Belews Ck Steam Station Notes Page 2
40 CFR 423 Steam Electric Power "Generating Point Source
Wastewater Source
Pollutant
Daily max
Monthly avg
(mm)
(m2fi)
Low Volume Waste
TSS
100.0
30.0
Sources
O&G
20.0
15.0
Fly Ash Transport Water
TSS
100.0
30.0
O&G
20.0
15.0
Metal Cleaning Wastes
TSS
100.0
30.0
O&G
20.0
15.0
Copper
1.0
1.0
Iron
1.0
1.0
Once Through. Cooling Free 0.5 0.5
Water Available
Chlorine
Per WLA 3/92 NJB Chlorination of cooling water -is not allowed.
Cooling Tower Blowdown Free 0.5 0.5
Available
Chlorine
Coal Pile Runoff TSS 50 50
No discharge of polychlorinated biphenyls. (This is required in Special Condition E.)
Hazardous substances as listed in 40 CFR 302.4 in boiler cleaning chemicals (Formic acid,
Ammonium Hydroxide, Ammonium Bifluoride, Corrosion Inhibitor, and Sodium
Hydroxide) are not water quality or EPA limited substances and therefore will not be
monitored for. More substances are listed on P.15-16 of Supplemental Information
submitted with permit renewal application.
Limitations on effluent sheets meet 40 CFR 423.12 BPT requirements.
Per guidance- for co -treatment facilities, sufficient free water volume is required in the ash
pond to include 1) direct rainfall to pond for 10y24h rainfall event, 2) all related flows, 3)
max dry weather flow, and 4) added solids to pond. Part IV of the application states that
the capacity is 3,403 Ac -ft and the calculated volume required for the life of the next permit
is 688.3 Ac -ft.

NC0024406 Duke Power Belews Ck Steam Station Notes Page 3
Recalculated
Mass Limits for 003 and 006
per 40 CFR 423
Wastewater Source Pollutant
Daily max
Monthly avg
(m2A)
(mg,L
003
Low Volume Waste TSS
100.0
30.0
Sources O&G
20.0
15.0
003
Fly Ash Transport Water TSS
100.0
30.0.
(ash removal lines) O&G
20.0
I5.0
003
Coal Pile Runoff TSS
50
50
003 also consists of stormwater runoff, yard holing sump
006
Metal Cleaning Wastes TSS
100.0
30.0
O&G
20.0
15.0
Copper
1.0
1.0
Iron
1.0
1.0
Outfall
Facility Compliance Data
Pollutant
Cone.
Mass
Reported Flow (last 2 yrs)
Limit
Limit
Flow (MGD) Max Ava
(mgfl)
(lb/days
001
1124 966 721
No limits
on eff page
003
7.4 11.8 7.9
TSSmax
50
4924
(facility listed 7.4 although flow
descriptions add up to 10.35)
TSSavg
30
1978
Using 11.8 MGD for max talc.
Using 7.9 MGD for avg talc.
O&Gmax
20
1969
O&Gavg
15
989
006
0.003 No data
TSSmax
100
2.50
Using 0.003 MGD for talc
TSSavg
30
0.751
O&Gmax
20
0.501
O&Gavg
15
0.376
Copper
1.0
0.025
Iron
1.0
0.025
(Limits calculated by multiplying flow x cont limit x 8.34.)

NC0024406 Duke Power Belews Ck Steam Station Notes Page 4
3%10 Summarized changes to permit:
Outfall 001:
Changed Upstream monitoring to either location (site 405 OR 419) instead of both. -
Added continuous monitoring of flow.
Added continuous monitoring of temperature at effluent.
Per .0500 regs, continuous cooling water effluent monitoring of flow and temp
is required. The facility already performs both, but does not log on DMR's
Outfall 003:
Removed Barium monitoring requirement.
erAVL-*.
Changed tox test effluent concentration from 33% to 19%. f I nPJ-i-1(�
Changed chronic tox sample type from composite to grab.
This was changed 5/19/93 by Randy Kepler but not updated in WATQ.
Removed Annual Pollutant Analysis.
Changed limits for O&G and TSS to mass limits from concentration limits.
Removed Outfall 005 effluent page. This outfall is no longer used.
Outfall 006: (Took back out per D. Williams, EPA, 7/16/97)
Reinstated monitoring at the effluent of this internal discharge to 003.
Put in mass limits for TSS, O&G, Copper, and Iron.
Special Conditions:
Removed L. - Equivalency condition is not applicable to this facility. Facility does use
BMP per Ron Lewis.
Updated M. - Put in new toxicity test language for 003.
Removed N. - Acute toxicity test for 005.
Removed O. - APAM.
Edited remaining conditions.
Date to Public Notice 12/4/96 Date to Issue 1/20/97
4/24 To Dave. Issue date 5/5/97
6/2 Got permit back from Dave to make minor changes.
Changed issue date to 6/5/97, effective 7/1.
6/5 Talked with Ron Lewis. He says when they do metals cleaning, the acid wash and alkaline
washwater goes to the cleaning holding pond where it sits for awhile. It neutralizes itself
and the iron precipitates out to the bottom of the pond. They release the water to the ash
pond when it looks good. There is a 30 page report on these procedures.
6/18 The facility is not doing metal cleaning as often lately; depends on how corroded tubes are.
Changing to an oxygen injection (from Hydrazine). This process puts a different protective
coating on the pipe; a hematite formation. Ron will find out how often metal cleanings are
done (1 since 92). At that time the inprocess monitoring met the limits at 006. When the
permit was reissued per basinwide plan, the limits for 006 were taken out.

�L�kS
Ron Lewis Fax [phone]
13339 Hagers Ferry Road Phone [phone]
Huntersville NC 28078-7929
Mail Code = MG03A5
Destratification -
Want to put in a new fine bubble diffuser 13 feet deeper and use it less frequently, turn on
in July - Aug. This would be more efficient to operate; they are trying to lift the cold water,
but only so much cold water at the bottom of the lake.
Will fax Ron permit and destratification e-mail. Told him to write a letter about 006 limits;
it would be Dave's call whether they stay or not.
6/25 Conference call with DAG, MLC and Ron Lewis. Dave gave verbal OK for facility to
initiate their new destratification system. Will write letter to this effect to Ron and he will
send in his comments on Jay Sauber's concerns.
Ron has problems with the 006 outfall limits. I will set up a call with Darryl Williams.
He may adjudicate.
Ron says it is a chemical metal cleaning process 423.13 (3)(e) BAT which has limits
for Copper and Iron (1.0 mg/1), not a metal cleaning process 423.12 (b)(5) BPT which
has limits for TSS, O&G, Copper, and Iron in (100, 20, 1, and 1 mg/l respectively).
Ron mentioned: 122.45(h)(2) Internal waste streams - Limits on internal waste streams will
be imposed only when the fact sheet under 124.56 sets forth the exceptional circumstances
which make such limitations necessary.
and 122.45(f) mass limitations.
6/30 Called Darryl Williams, EPA, [phone]. I left him a long involved message asking
if he is amenable to dropping the 006 limits.
7/16 Darryl called back. Yes, he is OK with not monitoring cleaning waste at the discharge to
the ash pond (006) because it is impractical, as long as the ash pond treats the water
adequately, which it does.
Will renew the permit with no limits for outfall 006 as was in the last permit
Darryl would like A(16) items 1, 3, 4, 7, & 8 from Dan River permit, NC0003468, added
to this permit. Faxed (A16) to Ron Lewis for his comments.
8/1 Called Ron Lewis to find out his comments, left a message.
8/4 Ron Lewis called and said that Wed (8/6) they would contact us about the language.
9/11 Called Ron Lewis again; left a message to please send me comments. He is out till 9/15.
9/17 Received fax from Ron. He is OK with adding A(16) items 1, 3, 4, 7, & 8 from Dan
River permit, NC0003468. He also had a question about the upstream Temp requirement.
I told him it was to his benefit to have that data; if the downstream limit is not met, it can be
shown that the upstream water temp was already above the limit. He wants just monitoring
of upstream, no limit.
Redid special condition pages to add R. Redid 001 eff page to include equip outage
footnote and move temp limits from U to D. To Dave for review and issue 9/22.
37
I C ,Lir_ C�i l_ . 1`12'x1
Jed 006 ,� ,.�1 �,,i l( �—d V\,//c sr.�

July. 1996 through August, 1995
Facility Name =
Duke - Belews Creek Steam Station
arameter -
Arsenic
L
:Parameter.
Barium
(( I r
'arameter.
Capper
NPDES p e
NC0024406
iStandard =
50 µgA
{�
ip$iandard
i
=
1 in
,Standard
=
CFR mgll
, C' '• I
/
Ow (MGD) =
11.9 m d
J
7010s (cls)_
80 cls
n
BDL=1/2DL 'it 1/2 DL
RESULTS
n
BDL=1/2DL 'it 12 DL
RESULTS
%j
n
BDL=1/2DL 'it 1/2 DL
RESULTS
IWC (%) =
18.6%
1
23 Jul -96
Sid Dev.
5.4
1
0.093 Jul -96
Std Dev. 0.0
1
0.0025
Std Dev.
0.0
2
5.1
Mean
5.7
2
0.087
Mean 0.1
2
0.0025
Mean
0.0
FINAL RESULTS
3
2.9
C.V.
0.9
`r
3
0.083
C.V. 0.1
3
0.0025
C.V.
0.0
'
Arsenic
Maximum Value
23
4
2.2
4
0.085
4
0.0025
Max. Prod Cw
Allowable Cw
92
269
5
6
2.6
4.3
Mutt Factor
4.0
`i1C
5
6
0.089
0.086
Mutt Factor 1.2
5
6
0.0025 '
0.0025
Mult Factor
0.0
=
=
=
7
4.2
Max. Value
23
pg4
7
0.087
Max. Value 0.093
mgll{
7
0.0025
Max. Value
0.0025 mg/
Barium
Maximum Value
0.093
8
2.8
Max. Pred Cw 92
µg4
0
0.091
Max. Pred Cw 0.112
mg"
8
0.0025 -
Max. Pred Cw
0.0000 mg/
Max. Prod Cw
0.112
9
3.4
Allowable Cw
269
µg/I �
9
0.078
Allowable Cw 5.4
mg/I;
9
0.0025
Allowable Cw
1.0 mgt
Allowable Cw
5.4
10
5.2
j
10
0.083
10
0.0025 '
11
4.9
11
0.081
11
0.0025 '
Copper
Maximum Value
0.0025
12
7.6
12
0.08
12
0.0025 '
Max. Prod Cw
0.0
13
5.9
13
0.082
}
3y
13
0.0025 '
Allowable Cw
1.0
w 14
14
14
15
15
15
Fluoride
Maximum Value
0.640
16
16
16
Max. Pred Cw
1.5
17
17
'
17
Allowable Cw
9.7
18
18
;<
18
19
19
's";
19
Iron
Maximum Value
0.220
20
t'
20
20
Max. Prod Cw
0.682
21
21
21
Allowable Cw
1.0
22
22
22
23
23
23
Selenium
Maximum Value
20
24
r
24
24
Max. Prod Cw
34
25
25$
25
Allowable Cw
27
26
26
#5
26
27
27
#
27
Sulfates
Maximum Value
797
28
28
.'•S
28
Max. Prod Cw
7,332
29
i
29
i
29
Allowable Cw
1,343
30
30
30
31
31
31
32
32
32
33
33
.`
33
34
34
;t
34
35
35
35
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cc: Permits.-and.Engineerinq'
Technical Support Branch
County Health Dept.
Central Files
WSRO
SOC PRIORITY PROJECT: Yes
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: ar c b
Date: September 23, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County Stokes
Permit No. NCO024406
PART I - GENERAL INFORMATION
1. Facility and Address: Duke Power Company
Belews Creek Steam Station
Walnut Cove, N.C. 27052
2. Date of Investigation: 960917
No X
3. Report Prepared by: David Russell, WSRO
4. Persons Contacted and Telephone Number: Ron Lewis, Duke
Power Company; Larry.Fincher, Duke Power - Belews Creek
[phone]
5. Directions to Site: Travel Hwy 311 from Winston-Salem to
Walnut Cove. At intersection of Hwy 311 and Hwy 65, take
Hwy 65 East. Turn left on SR 1908, continue on SR 1908 to
facility entrance on the right.
6. Discharge Points(s), List for all discharge points:
Discharge
001
- Latitude:
360
16'
48"
Longitude:
800
03'
53"
Discharge
003
- Latitude:
360
181
17"
Longitude:
800
04'
53"
Discharge
006
- Latitude:
360
17'
05"
Longitude:
800
04'
18"
U.S.G.S. Quad No. B18SE U.S.G.S. Quad Name Belews Lake
7. Site size and expansion area consistent with application?
X Yes No If No, explain:
8. Topography.(relationship to flood plain included): The
entire area is above the flood plain.
9. Location of nearest dwelling: None within 10001.

10. Receiving stream or affec�ed.surface waters: Dan River (003
and 006); Belews Lake (003)
a. Classification Dan River - WS IV, Belews Lake - WS IV
b. River Basin and Subbasin No.: 030201
C. Describe receiving stream features and pertinent
downstream uses: Dan River is a water source for
Madison, Eden and Danville VA. Belews Lake is a
cooling water lake for Duke Power, but it is used for
contact and non -contact recreation.
Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: No limit MGD
(Ultimate Design Capacity)
b. What is the current permitted capacity of the Waste
Water Treatment facility? No limits for permitted
discharges
C. Actual treatment capacity of the current facility
(current design capacity)? NA
d. Dates) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years. NA
e. Please provide a description of existing or
substantially constructed wastewater treatment
facilities; 001 = once through cooling water -.no
treatment; 003 - ash basin; 006 - metal washing
discharge is into ash basin.
f. Please provide a description of proposed wastewater
treatment facilities. NA-
9- Possible toxic impacts to surface waters: Selenium has
been a concern in the past at this site.
h. Pretreatment Program (POTWs only):
in development approved
should be required not needed
2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DEM
Permit No.
Residuals Contractor
NPDES Permit Staff Report
Version 10/92
Page 2

b.
Telephone No.
Residuals stabilization:
Other
PSRP PFRP
C. Landfill: Fly ash is landfilled on Duke Power Property
adjacent to the ash basin; fly ash is.hauled off site
for reuse.
d. Other disposal/utilization scheme (Specify):
3. Treatment plant classification (attach completed rating
sheet).
4. SIC Code(s) : 1 �q�\
Primary 14 Secondary 69 68
Main Treatment Unit Code: 0 0 0 - 2
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved. (municipals only)?
2. Special monitoring or limitations (including toxicity)
requests: Recommend all effluent samples for 003 be taken
at the effluent parshall flume.
3. Important SOC, JOC or Compliance Schedule dates: (Please
indicate)
Date
Submission of Plans and Specifications _
Begin Construction
Complete Construction
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available. Please provide
regional perspective for each option evaluated. NA
Spray Irrigation:
Connection to Regional Sewer System:
Subsurface:
Other disposal options:
5. Other Special Items:
NPDES Permit Staff Report
Version 10/92
Page 3

PART IV - EVALUATION AND RECOMMENDATIONS
This facility has three discharges.
(1) 001 - once through cooling water, non contact water -
1124 mgd
(2) 003 - Ash settling pond (also includes coal pile
runoff, yard stwr4 water) - 7.4 mgd
(3) 006 - metal cleaning waste (discharges into ash basin)
- 12 mg/yr
Recommend continued thermal monitoring for 001; recommend
monitoring of all effluent parameters for 003 at the effluent
parshall flume.
Recommend the permit be renewed.
/ 24-3
Signature of report preparer
Water Quality Regional Supervisor
Date
NPDES Permit Staff Report
Version 10/92
Page 4

Division of Water Quality
Biological Assessment Group
October 23, 1996
To: Mary L. Cabe
Through: Ken Eagleso
Jimmie Overton
From: Trish Finn MacPherson
Subject: Review of Belews Creek Steam Station request for reduction in sampling
In a report titled "Assessment of balanced and indigenous populations in Belews Lake" , August
1996, Duke Power Company asks for several changes in water chemistry, sediment, fish and fish
tissue sampling as noted below:
1. Water samples reduced from profile sampling to just top and bottom.
2. Sediment sampling would eliminate five sites, leaving 3 main lake sites.
3. Fish community would be monitored annually in spring by shoreline electrofishing-this appears
to be a change that has already been initiated, since cove rotenone sampling was not done in 1995.
4. Fish tissue sampling for selenium would be reduced to only common carp, redear sunfish and
crappie annually in spring at four downlake stations. This is a reduction from nine fish species
before.
My staff have reviewed the above changes and have no problems with the reductions in water,
sediment and fish tissue sampling. The elimination of cove rotenone sampling may result in the
loss of some important fisheries information. My staff feel that the cove rotenone sampling
provides a more complete assessment of the fish community, since, in theory, all the fish in the
cove are killed and collected. Shoreline electrofishing may not provide comparable data. We
would be interested to know if Duke Power has done comparison sampling to show that shoreline
electrofishing alone is providing comparable data.
Your memo did not ask for our evaluation of whether the report does in fact show that there is a
balanced and indigenous population in Belews Lake. Please let me know if you would like that
evaluation done. What would be the consequences if our evaluation differs from the report and we
feel that the fish community is not balanced and indigenous?

DEHNR/D W Q
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC000 ','j*,VA`
Applicant/Facility Name:
Applicant Address:
Facility Address:
Permitted Flow
Type of Waste:
Facility/Permit Status:
County:
Regional Office:
USGS Topo Quad:
Stream Characteristics:
Receiving Stream
Stream Classification
Subbasin
Dan River (003)
Drainage Area (mi2):
Summer 7Q10 (cfs)
Winter 7Q10 (cfs):
Average Flow (cfs):
IWC (%):
Duke Power Co - Belews Ck Steam Electric Plant
NCSR 1908, Walnut Cove NC 27052
Pine Hall Road, Walnut Cove NC 27052
No Limit
Domestic - 0%
Industrial - 100%
Renewal
Stokes
Winston-Salem
B 18SE
CDa'n_Ri_v_er / Belews Lake
�VYS.IV (Q03) /.0 (001);1
.03-02-01.
501
80
160
576
19
Description of Wastewater Treatment Facilities
The facility discharges non -contact condenser cooling water and stormwater to outfall 001
(average flow = 1124 MGD), coal pile runoff, chemical holding pond treated effluent,
water from ash sluice lines, and stormwater So outfall 003 (average flow = 7.4 MGD), and
a periodic discharge of metal cleaning waste and low volume waste to outfall 006, which is
an internal discharge to 003 (average flow = 0.003 MGD).
Basis for Proposed Effluent Limits
Limits are based on Federal effluent guidelines for the steam electric power generating point
source category (40 CFR Part 423, July 1, 1993) and best practicable control technology
currently available. Temperature, Oil and Grease, TSS, Iron and Copper are based on 40
CFR 423. Arsenic, Fluoride, and Selenium are based on North Carolina Water Quality
regulations 15A NCAC 2B .0211(b)(3)(L).
Monitoring frequencies are based on Federal effluent guidelines for the steam electric
power generating point source category (40 CFR Part 423, July 1, 1993) and best
practicable control technology currently available (BPT) 423.12, and 15 NCAC 2B .0500.
Page 1 of 3

Outfall 001 (Belews Lake)
Duke Power Company requested that upstream monitoring be removed from permit. This
was not granted, but two upstream monitoring locations are not necessary since they
generally portray the same data. It is requested that site 419 be retained as the upstream
monitoring location, but given the difficulties with this site (including vandalism of the
equipment), site 405 is sufficient if it has a better safety history. The upstream temperature
limit was removed and a downstream monthly average limit of 32°C(89.6°F) was added.
The Annual Report submitted by Duke Power Company had other requests including:
• Deletion of sites: 423.31, 423.32, and 423.33 and 419.31, and 419.32.
• Water samples reduced from profile (0.3, 5, 10, 20 and 30 m (or bottom depth)) to just
surface and bottom samples. In-situ data will continue to be collected at 1 in intervals.
These requests have been granted.
Per 15A NCAC 2B .0500 regs, cooling water shall be monitored continuously at the
effluent for flow and temperature.
Instream monitoring data were examined from October 1995 through September 1996. No
temperature readings were above 89.6°C during any discharge. Instream monitoring for
temperature will continue per the outfall 001 effluent limitations and the Dan River
Monitoring Plan including the above changes.
Outfall 003 (Dan River)
The flow estimate has changed due to an updated flow profile of the Roanoke River basin
by USGS and suspect flow estimates from 1987. This will effect the toxicity test effluent
percentage. The test will be performed at 19% effluent concentration instead of 33% as
was required in the last permit. Compliance is determined using an EPA approved test.
All other requirements are the same except for the following:
The barium monitoring requirement was removed based on the maximum predicted
concentration being 0.112 mg/1 and the allowable concentration being 5.4 mg/l, the removal
of the Pollutant Analysis Condition (APAM) requirement, and concentration limits were
changed to mass limits for oil & grease and total suspended solids.
Outfall 005 (Belews Lake)
Pipe 005 has ceased discharge and has been sealed off. The effluent monitoring page has
been removed from the permit.
Special Conditions
The following changes were made to the Special Conditions:
Added outfall 006 internal discharge condition.
Updated toxicity test language for outfall 003.
Removed the APAM test requirement language.
Added boiler cleaning procedures and BMP's.
Removed the biocide condition.
Removed the acute toxicity test language for abandoned outfall 005.
Page 2 of 3

Note: instream monitoring requirements are not stipulated in this permit, but have been
coordinated through other agreements (including The Dan River Monitoring Plan). This
area of the Dan River is ideal for the formation of an association of dischargers to perform
instream monitoring. It has been suggested that Duke Power take the lead for this
coordinated monitoring as they are already familiar with the Dan River and have a history
of very good instream monitoring compliance.
This permit will expire 01/31/02
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: 12/04/96
Permit Scheduled to Issue: 01/20/97
State Contact
If you have any questions on any of the above information or on the attached permit, please
contact Mary Cabe at [phone], ext. 518.
Copies of the following are attached to provide further information on permit development:
1. Existing permit's effluent sheets, and
2. Proposed draft permit.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by:
Date:
Reviewed by
Regional Supervisor: Date:
Permits & Engineering: Date:
RETURN TO TECHNICAL SERVICES BY
Page 3 of 3