NC0004987_Renewal Application_20050425

A F
W T
�O G
r
Mr. Michael A Ruhe, Manager
Environmental Support,
Duke Power, P.O. Box 1006
Charlotte, North Carolina 28201
Dear Mr. Ruhe:
©'NLS
NCDENR
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
April 25, 2005
Subject: Issuance of NPDES Permit NC0004987
Marshall Steam Station
Catawba 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).
This final permit includes no major changes from the draft permit sent to you on February 16, 2005.
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 bythe Division of Water Quality or permits required bythe Division of Land
Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be
required. If you have any questions concerning this permit, please contact Sergei Chernikov at telephone number
[phone], extension 594.
cc: NP S files
Mooresville Regional Office / Water Quality Section
Aquatic Toxicology Unit
Mr. Roosevelt Childress, EPA Region IV
DEH
N. C. Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
Internet: h2o.enr.state.nc.us
Sincerely,
ORIGINAL SIGNED SY
SUSAN A. WILSON
Alan W. Klimek, P.E.
Phone: [phone]
fax: [phone]
DENR Customer Service Center. 1800 623-7748

f
PERMIT NO. NC0004987
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 provisions 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
Marshall Steam Station
At the intersection of NC Highway 150 and NCSR 1841
Terrell
Catawba County
to receiving waters designated as the Catawba River (Lake Norman) in the Catawba
River Basin in accordance with effluent limitations, monitoring requirements, and
other conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective June 1, 2005.
This permit and authorization to discharge shall expire at midnight on April 30, 2010.
Signed this day Apri125, 2005.
ORIGINAL S1�iJ S®�
SUSAN .A
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 1 of 13

PERMIT NO. NC0004987 - 1W
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are
hereby revoked, and as of this issuance, any previously issued permit bearing this number is
no longer effective. Therefore, the exclusive authority to operate and discharge from this facility
arises under the permit conditions, requirements, terms, and provisions included herein.
Duke Energy Corporation
is hereby authorized to:
1. Continue to discharge once -through cooling water and intake screen backwash
through outfall 001; treated wastewater (consisting of metal cleaning wastes,
coal pile runoff, ash transport water, domestic wastewater, low volume wastes,
and FGD wet scrubber wastewater) from the ash settling basin through outfall
002; treated FGD wet scrubber wastewater through internal outfall 004
(upstream of the ash settling basin); yard sump overflows through ,outfalls 002A
and 002B; and non -contact cooling water from the induced draft fan control
house through outfall 003. All discharges result from activities at Duke Energy's
Marshall Steam Station at the intersection of NC Highway 150 and NCSR 1841
in Terrell, Catawba County;
2. Construct and operate a FGD wet scrubber wastewater treatment system
discharging to the ash settling basin through internal outfall 004; and
3. Discharge from said treatment works at the locations specified on the attached
map into the Catawba River (Lake Norman) which is classified WS -IV and B CA
waters in the Catawba River Basin.
Page 2 of 13

M�L�Vpll`
ME! 72)21227
Lake Norman North Quad
03-08-32
002A and 002B
ll,)" GO,
002
O
'-2
cl)
�Outfall Information
FAcility'
Outfall #:
Outfall 0024and 002B,
Stream: Catawba River
R Catawba
eceivi
35'35'43"
Latitude ¢l
80'57'52"
Lonkitndc:8005TM-
%
LoiWttide for 002-)3-?_
D&eliP6wer Corporation
#: 002,
Outfull #! 003
Rgecejyvin Strearm. Catawba River
1
Aeceiv4�g8trcam: Catawba Riv
z NCO004,997
Not -h
Latitude:, 35036'2 P
latitude: 35°35 '52 ""
Lonettude. 057'3�'
Longitude.; 9657'47"
Marshall Steam Station

PART I
SECTION A. FINAL LIMITATIONS AND CONTROLS
1. Effluent Limitations and Monitoring Requirements (Outfall 001)
v
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 001 (once -through cooling water). Such
discharges shall be limited and monitored by the Permittee as specified below:
�' � ' �r ; � �
DISCHARGE�LIMLT1�iIONS � .`���,, MONiTO,�NG,REQUIREMENTS'� �#
EFFLL7EI�T
Git�RACTiSTICS
Montfily
Daily�� 1Vleasureme
}
Sample
9 k 5� YF att
r Avg, a
�' tS {
Y.£
axtmuin rFre uenc ' T
�.
R yE4 Sm �hk
Locatxort
.�..{,, r,
rA ,e , .
t
-
Pump logs or
Flow (MGD)
Monitor 8& Report Daily similar
Effluent
readings
Temperature
33.3 oC
Daily Grab
Effluent
(November 1- June 30
Temperature
34.4 oC
Daily Grab
Effluent
ul 1- October 31
Free Available Chlorinel
0.2 mg/L
0.5 mg/L Daily Grab
Effluent
NOTES:
1 Once -through cooling water shall not be chlorinated. Should the facility wish to chlorinate once -
through cooling water, a permit modification must be issued prior to commencement of chlorination.
The monitoring requirement and effluent limitations only apply if chlorination is commenced.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
The Regional Administrator has determined pursuant to Section 316(a) of the Act that the thermal
component of the discharge assures the protection and propagation of a balanced, indigenous population
of shellfish and wildlife in and on the receiving body of water. Water quality temperature standards must
be maintained outside the approved 316(a) mixing zone.
Page 4 of 13

PART I
2. Effluent Limitations and Monitoring Requirements (Outfall 002)
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 002 (ash settling basin discharge). Such
discharges shall be limited and monitored by the Permittee as specified below:
x
EFFLUENT �
CIiARACTERISTi(S
DISCHARGE LIMITATIOl�1S
MONITORINGI�E�iYTTZENTS
C
`Monfhly r
Avera 4 a
��, .°I aily��,
�` ,11%Iaxuriiim;
Measureuieht _
Fre uenc
Sample
�.,f. TYPIP.,t
Sample- ,
Locahonl..�i
Flow (MGD)
Monitor &Report
Monthly
Pump logs or
similar
readings
Effluent
Oil and Grease
9.0 mg/L
12.0 mg/L
Quarterly
Grab
Effluent
Total Suspended Solidsz
20.0 mg/L
65.0 mg/L
Monthly
Grab
Effluent
Total Arsenic3
Monitor & Report
Weekly
Grab
Effluent
Total Cadmium4
Monitor 8& Report
Weekly
Grab
Effluent
Total Chromium4
Monitor &Report
Weekly
Grab
Effluent
Chloride4
Monitor & Report
Weekly
Grab
Effluent
Total Copper
1.0 mg/L
1.0 mg/L
See note 5
Grab
Effluent
Total Iron
1.0 mg/L
1.0 mg/L
See note 5
Grab
Effluent
Total Mercury4
Monitor &Report
Weekly
Grab
Effluent
Total Mcke14
Monitor & Report
Weekly
Grab
Effluent
Total Selenium'
Monitor &Report
Weekly
Grab
Effluent
Total Silver4
Monitor & Report
Weekly
Grab
Effluent
Total Zinc4
Monitor 8r- Report
Weekly
Grab
Effluent
Total Nitrogen
Oz+NO3+TK
Monitor &Report
Monthly
Grab
Effluent
Total Phosphorus
Monitor 8& Report
Quarterly
Grab
Effluent
Chronic Toxicity
See Part I, Section A, # 14
Quarterly
Grab
Effluent
pH
Between 6.0 and 9.0 Standard
Units
Monthly
Grab
Effluent
Pollutant Analysis
See Part I, Section A, # 20
Grab
Effluent
NOTES:
1 Effluent sampling shall be conducted at the discharge from the ash settling basin prior to mixing with
any other waste stream(s).
2 A total suspended solids monthly average of 40 mg/L is permitted provided the Permittee can
demonstrate that the difference between the monthly average of 20 mg/L and 40 mg/L is the result of
the concentration of total suspended solids in the intake water.
3 Monitoring for arsenic & selenium shall be conducted weekly when outfall 004 is discharging. When
004 is not discharging, monitoring shall revert to quarterly.
4 Monitoring is required only when outfall 004 is discharging.
5 Monitoring shall be per occurrence of chemical metal cleaning and samples shall be from a
representative discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 5 of 13

PART I
3. Effluent Limitations and Monitoring Requirements (Outfall 002A)
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 002A (yard sump #1 overflows). Such
discharges shall be limited and monitored by the Permittee as specified below:
NOTES:
1 Effluent samples shall be collected at a point upstream of the discharge to the Catawba River.
2 Sampling for iron is required when TSS is reported as greater than 100 mg/L.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
All flows shall be reported on monthly DMRs. Should no flow occur during a given month, the words "No
Flow" shall be clearly written on the front of the DMR. Episodic sampling is required per sump overflow
occurrence lasting longer than one hour. All samples shall be of a representative discharge.
Page 6 of 13
�DIS@[3AAGE LIMITATIONS
a
1�IONITORING REQUIREMENTS
� h
EFFl:.L7ENT � � f
M1 ` 1' thly � Datly �� °
Measiirexdent
,:
'
CIIARACTERIST"ICS
z
r
1Vlaxurium
��,
Ftv fe�m fi,
I.ocauon?
e
Flow (MGD)
Episodic Estimate
Effluent
pH
Episodic Grab
Effluent
Total Suspended Solids
Episodic Grab
Effluent
Total Iron
See note 2 Grab
Effluent
NOTES:
1 Effluent samples shall be collected at a point upstream of the discharge to the Catawba River.
2 Sampling for iron is required when TSS is reported as greater than 100 mg/L.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
All flows shall be reported on monthly DMRs. Should no flow occur during a given month, the words "No
Flow" shall be clearly written on the front of the DMR. Episodic sampling is required per sump overflow
occurrence lasting longer than one hour. All samples shall be of a representative discharge.
Page 6 of 13

PART I
4. Effluent Limitations and Monitoring Requirements (Outfall 002B)
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 002B (yard sump #2 overflows). Such
discharges shall be limited and monitored by the Permittee as specified below:
NOTES:
1 Effluent samples shall be collected at a point upstream of the discharge to the Catawba River.
2 Sampling for iron is required when TSS is reported as greater than 100 mg/L.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
All flows shall be reported on monthly DMRs. Should no flow occur during a given month, the words "No
Flow" shall be clearly written on the front of the DMR Episodic sampling is required per sump overflow
occurrence lasting longer than one hour. All samples shall be of a representative discharge.
_c
Page'J of 13
DISCHAR LIMITATIONSMONI'TOItINGREQLTIRF;NINTS
AFFLUENT �,
Monthly ``
Daily Measurement Sample Sample
CHARACTERISTICS
Avera a1Vlaxunum'
Fne ttenc'`I e-iL_`ocatoni
Flow (MGD)
Episodic Estimate Effluent
pH
Episodic Grab Effluent
Total Suspended Solids
Episodic Grab Effluent
Total Iron
See note 2 Grab Effluent
NOTES:
1 Effluent samples shall be collected at a point upstream of the discharge to the Catawba River.
2 Sampling for iron is required when TSS is reported as greater than 100 mg/L.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
All flows shall be reported on monthly DMRs. Should no flow occur during a given month, the words "No
Flow" shall be clearly written on the front of the DMR Episodic sampling is required per sump overflow
occurrence lasting longer than one hour. All samples shall be of a representative discharge.
_c
Page'J of 13

PART I
5. Effluent Limitations and Monitoring Requirements (Outfall 003)
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 003 (non -contact cooling water from the
induced draft fan control house). Such discharges shall be limited and monitored by the
Permittee as specified below:
`EFFLUENT ,r
D1SCFiARGE LIlVIITATIONS=
MO1vI�I'OR.YNGREQUIREML�NTS
Monthly �, Dail} ;
1Vleasurement ,
Samples r ample t
CHARACTEIZIS`ICSk
n 4„
#
Avera of titflViaxunum
Fre uen�
eI oeatton
_.T
Flow (MGD)
Temperaturel
Total Residual Chlorine2
Free Available Chlorine2
0.2 mg/L 0.5 mg/L
Between 6.0 and 9.0 Standard
PH
Units
NOTES:
1 The temperature of the effluent shall be such as not to cause an increase in the temperature of the
receiving stream of more than 2.8oC and in no case cause the ambient water temperature to exceed
290C.
2 Monitoring requirements apply only if chlorine is added to the cooling water. Neither free available
chlorine nor total residual chlorine may be discharged from any unit for more than two hours in any
one day and not more than one unit in any plant may discharge free available chlorine or total
residual chlorine at any one time.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Limitations shall be met at the discharge effluent. Monitoring frequencies are not specified as the
discharge is to the intake canal for outfall 001.
r,
x
Page 8 of 13

PART I
6. Effluent Limitations and Monitoring Requirements (Outfall 004)
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from Internal Outfall 004 (treated FGD wet scrubber
wastewater to ash settling basin). Such discharges shall be limited and monitored by the
Permittee as specified below:
. ,` a
EF)1LL7ENT
�GHARACTERISTICS�
r
DISCHARGE LTMITATIQNS3
Y
t, MONITBRINGFREQT7IREMENTS-`
Monthly
A ve_ ra e _
Darty
Ma7umu_m�:
1V�asurement
`=�
Fre uenc -,=
S
a
' "YO 4 e r=I
tSample
T,ocatioii }
Flow (MGD)
Monitor & Report
Monthly
Pump logsor
similar
readings
E
Total Suspended Solids
Monitor & Report
Weekly
Grab
E
Total Arsenic
Monitor & Report
Weekly
Grab
E
Total Cadmium
Monitor & Report
Weekly
Grab
E
Total Chromium
Monitor &Report
Weekly
Grab
E
Chloride
Monitor 8r Report
Weekly
Grab
E
Total Mercury
Monitor & Report
Weekly
Grab
E
Total Nickel
Monitor & Report
Weekly
Grab
E
Total Selenium
Monitor 8t Report
Weekly
Grab
E
Total Silver
Monitor &Report
Weekly
Grab
E
Total Zinc
Monitor & Report
Weekly
Grab
E
NOTES:
1 Sample Location: E - Effluent from the constructed wetland prior to discharge to the ash settling
basin.
All flows shall be reported on monthly DMRs. Should no flow occur during a given month, the words "No
Flow" shall be clearly written on the front of the DMR. All samples shall be of a representative discharge.
DMRs for this outfall shall be submitted only after discharge commences from the FGD system.
Page 9 of 13

PART I
7. DEFINITIONS
The term "low volume waste sources" means, taken collectively as if from one source, wastewater from all
sources exceptthose for which specific limitations are otherwise established in this part. Low volume
wastes 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, and recirculating house service water systems. Sanitary
and air conditioning wastes are not considered low volume wastes.
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.
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.
Chemical metal cleaning will be conducted according to approved Duke Power equivalency
demonstration.
The term "FGD wet scrubber wastewater" means wastewater resulting from the use of the flue -gas
desulfurization wet scrubber.
8. TOXICITY RE -OPENER CONDITION
This permit shall be modified, or revoked and reissued to incorporate toxicity limitations and monitoring
requirements in the event toxicity testing or other studies conducted on the effluent or receiving stream
indicate that detrimental effects maybe expected in the receiving stream as a result of this discharge.
9. ..MONITORING FREQUENCIES
If the Permittee, after monitoring for at least six months, determines that effluent limits contained herein
are consistently being met, it may be requested of the Director that the monitoring requirements be
reduced to a lesser frequency.
10. POLYCHLORINATED BIPHENYL COMPOUNDS
There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for
transformer fluid.
11. 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 new biocides into outfalls currently tested for
whole effluent toxicity.
12. INTAKE SCREEN BACKWASH'
Continued intake screen backwash discharge and overflow from the settling basin are permitted without
limitations or monitoring requirements.
13. BEST MANAGEMENT PRACTICES
It has been determined from information submitted that the plans and procedures in place at Marshall
Steam Station are equivalent to that of a Best Management Practice (BMP).
Page 10 of 13

PART I
14. 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 12%.
The permit holder shall perform at a minimum, quarterly 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.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months as described in "North Carolina Phase II 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 TGP313 for the pass/fail results and THP313 for the Chronic Value. Additionally, DWQ Form AT -3
(original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Water Quality
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.
Page 11 of 13

PART I
15. ASH SETTLING BASIN
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 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.
Annually 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 required
volume is available with adequate safety factor to include all solids expected to be deposited in the ponds
for the following year. 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.
16. CHEAUCAL METAL 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 to 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 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 measurably increased during the ash pond equivalency demonstration at the Duke Power
Company's Riverbend Steam Station. Therefore, when the following conditions are implemented during
metal cleaning procedures, effective treatment for metals can be obtained at this facility:
(1) Large ash basin providing potential reaction volumes.
(2) Well-defined shallow ash delta near the ash basin influent.
(3) Ash pond pH of no less than 6.5 prior to metal cleaning waste addition.
(4) Four days retention time in ash pond with effluent virtually 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, NaBr03; ammonium carbonate, (NH4)2CO3; and
ammonium hydroxide, NH40H.
(b) Iron removal step -hydrochloric acid, HCl; and ammonium bifluoride, (NH4)BF2 and proprietary
inhibitors.
(7) Maximum dilution of wastes before entering ash pond 6 to 1.
(8) 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 re -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 EPA including all pertinent data.
17. FLOATING MATERIALS
The Permittee shall report all visible discharges of floating materials, such as an oil sheen, to the Director
when submitting DMRs.
18. DIKE INSPECTIONS
The permittee shall check the diked areas for leaks by a visible inspection and shall report any leakage
detected.
Page 12 of 13

PART I
19. CHEAHCAL DISCHARGES
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.
20. PRIORITY POLLUTANT ANALYSIS
The Permittee shall conduct a priority pollutant analysis (in accordance with 40 CFR Part 136) once per
permit cycle at outfall 002 and submit the results with the application for permit renewal.
21. WAIVERS
Nothing contained in this permit shall be construed as a waiver by permittee or any right to a hearing it
may have pursuant to State or Federal laws or regulations.
22. SECTION 316 (B) OF CWA
The permittee shall comply with the Cooling Water Intake Structure Rule per 40 CFR 125.95.
Page 13 of 13

1
Subject: Draft Permit reviews (3)
From: John Giorgino <[e-mail]>
Date: Wed, 23 Mar 2005 16:18:40 -0500
To: sergei chernikov <[e-mail]>
imap://sergei. [e-mail]:143/f...
Hi Sergei, I have reviewed the following permits:
NC0004375 Clariant - Test months are not specified on page 3 (A 1a), page 4 (Alb) or
page 10 (A3). These should be: Mar, Jun, Sept, Dec.
NC0004987 Marshall Steam Station - No comments
NC00086517 Gatewat Village - No comments
Thanks for forwarding them.
-John
John Giorgino
Environmental Biologist
North Carolina Division of Water Quality
Environmental Sciences Section
Aquatic Toxicology Unit
Mailing Address:
1621 MSC
Raleigh, NC 27699-1621
Office: 919 733-2136
Fax: [phone]
Email: [e-mail]
Web Page: http://www.esb.enr.state.nc.us
L of 1 3/23/2005 4:24 PM

imap:Hsergei. chemikov%40dwq. [e-mail]:143/f...
Subject: COMMENTS ON DRAFT NPDES PERMIT NC0004987 FOR MARSHALL STEAM
STATION
From: Robert R Wylie <[e-mail]>
Date: Fri, 18 Mar 2005 10:09:14 -0500
To: [e-mail]
Sergei,
The draft NPDES permit has been reviewed by Duke representatives. The following provides Duke's
comments:
• Cover letter. "Marshall" is misspelled. The county is Catawba County.
o Page 2 of 13. An ATC for outfall 004 has already been approved.
■ Page 5 of 13. Include "Monitor and Report" for all parameters that do not have permit
limits. For zinc previously it was required to be monitored monthly. In review of historical
data most of the data indicates less than detection levels. Duke is okay with how this draft
permit is written in that monitoring for zinc will not begin until the FGD starts up based on
historical values. I just wanted to point this out to you.
■ Page 13 of 13. The page number is missing. The last item should be item "22"
instead of "21".
Part II Page 5 of 16. For item 7. The formatting needs to be indented more
on the right side of the page.
■ Part II Page 8 of 16. Under item 5.b. (3) drop "(B)" in this sentence.
Part II. E. 6. (b) (B) is not in the permit. Under 5. "d". The "d" should
actually be "c". Please change to "c".
■ Part II Page 10 of 16. Under item E.2.c. "alteration" is
misspelled as "altenation" Please correct.
Overall Duke's comments are relatively minor with primarily typo
correction requests. Thus if okay with you this e-mail will serve
as Duke's official response to your February 16, 2005 memo
instead of a letter being mailed to your office. If a letter is
needed please let me know and I'll send one out before the 30
day period of receipt is up (March 23, 2005).
Thanks,
Robert
1 of 2 3/18/2005 1:42 PM

PUBLIC IVU I IL;t
rvovice: Catawba C,
STR7E OF NOOTH
try Club, Inc. 11154 Cot
WZOLINA8
Club Road, Newton,
EFMR524 &[ ,
28658) has applied for
MANAGEMEN.
newal of NPDES' pe
COMMISSION/
NCO050920 for the C
NPDES UNIT
wba Country Club WWT
151.7 MAIL SERVICE
Catawba County. This I
"CENTER
Since 1879 mitted facility dischar
(LEIGH, NC 27699-1617
7,500 gallons per day to
JOTIFICATION OF IN-
ed wastewater to an
r named tributary
NT TO ISSUE A NPDES
to He
- Fork River in the Catav
'ASTEWATER PERMIT
River Basin. Curren
Dammonia
the basis of thorough
a dtotalresidual chlor
f review and application
are water quality limit,
NC General Statute
This discharge may aff
1.21, Public law 92-500
I other lawful standards
309 North College Avenue future allocations in 51. p
I regulations, the NorthPost
Office Drawer 48 tion of the Catawba Ri,
'olina Environmental
Newton, North Carolina 28658 Basin.
NC0004987 Duke Enel
iagement Commission
poses to issue a Nation-
Telephone 8: Corporation Mt
'ollutant Discharge Elimi-
FAY-, 8: shall Steam Station
on System (NPDES)
Cata-
wba
Notice: Duke Pow
stewater discharge per-
P.O. Box 1006, Charlol
to the person(s) listed
14CDENR DWQ/Point Source Branch NC 28201, has applied
ow effective 45 days
Ti the puFjsh date of this
renewal of its NPDES d
Attn: Carolyn Bryant charge permit for Marsh
ice.
1617 Mall Service Center BuckSteam9Stati n (nu
itten comments regarding
her
Raleigh, NC 27699-1617 ing to the Catawba River
proposed permit will be
the Catawba River Bas
:epted until 30 days after
This facility operates fi
publish date of this no-
DATE DESCRIPTION CHARGE BALANCE outfalls, 001 (once -throe
I. All comments received
non -contact cooling wate
)r to that date are consid-
002 (ash settling pond d
d in the final determine-
charge), 002A and 00'
is regarding the pro-
(yard sump overflows), a
ted permit. The Director
003 (fan control house cc
:he NC Division of Water
2/18/05 Environmental M ement PDES 141-53 141.53 ing water). Currently oil a
ality may decide to hold
grease, total suspended s
ublic meeting for the pro-
ids, copper, and iron z
:ed permit should the Di-
water quality limited. TI
on receive a significant
discharge may affect futL
Tree of public interest.
allocations in this portion
the Catawba River Basin,
oies of the draft permit
NCO074233 V 11'\
I other supporting infor-
NORTH CAROLINA Cata-
tion on file used to deter-
wba County Board of Ec
to conditions present in
cation Blackburn E.
draft permit are avails-
CATAWBA COUNTY) mentary School
upon request and pay-
Cata-
nt of the costs of repro-
STEVE GARLAND... BEING DULY SWORN SAYS: That he is the publisher ofthe wba
Mon. Mail comments
Ilor requests for informa-
Notice: The Catawl
OBSERVER -NEWS -ENTERPRISE, a newspaper published at Newton, N.C., that is a County Board of Educatil
I to the NC Division of
newspaper of general circulation in Catawba County and surrounding counties and that the (PO Box 1000, Newton, n
ter Quality at the above
Iress or call the Point
28658) has applied for r
annexed notice of Environmental Management (NPDES) newal of NPDES
uce Branch at (919)
peen
d Is a true the notice as NCO074233 for Blackbu
was published In said newspaper and not a supplement thereo� anrue copy o
1-5083, extension 520.
ase include the NPDES
Elementary School WWI
was published in the regular and entire edition of THE OBSERVER-NEWS-ENTERPRIS in Catawba County. Tt
mit numbar (attached) inth
, communication. Inter-
permitted facility discharg,
appearing each week, beginning on the th 18 day of February 2005 and ending on the 1115,000
ad persons may also visit
gallons per d
day of February, 2005 and that said OBSERVER -NEWS -ENTERPRISE w regulary distribed treated wastewater to Ha
Division of Water Quali-.
at512 N. Salisbury
Creek in the Catawba RN
its subscribers during said period.
set, Raleigh, NC 27604-
Basin. Currently, ammor
���� nitrogen and total residL
B between the hours of
chlorine are water qual
) a.m. and 5:00 p.m. to
limited. This discharge m
ew information on file.
Sworn to and subscribed before me, this 18th day of February, 2005 affect future allocations
10029297 .J A
this portion of the Cgtawl
t J�y1 Syr River Basin. fat
a
.� oo z, NCO044121 City of Hic
County
Count Board of Edu-
a%`A
�• �` . ory Hickory
on Fred T. Foard High
fool Catawba
7 ~ti or City/V,/TP Catawba
% a tie►+T �\O� Notice: The City of Hic
ice: Catawba Coun-
J' �G
_�
NOTARY PUBLIC t� ,/ cry, P.O. B6x 398, Hickoi
Board of Education (PO
t®�" NC 28603, Water Tref
1000, Newton, NC
ment Plant located at 151
58) has applied for re-
ral of NPDES ermit
® r V�t.1�� + . Old Lenoir Road, NPDE
)`
)029297 for the Fred T.
rd High School WWTP
My Commission expires... APRIL 24,...2009 ......, """" o�/ ,,••w,,.+' No. NC0044121, ,has a
""" a plied for renewal of its p(
�Ecou�
'atawba County. This
s , , mit discharging up to 0.3:
a + MGD filter -backwash wast
nitted facility discharges
)00 gallons day
water to receiving wale
per
ted wastewater to Pott
designated as Lake Hickc
ek in the Catawba River
(the Catawba River) in t
in. Currently, ammonia
&ataw4 R�ixerBesin- :-
44to&tr44-A '.## Di(
)gen is water quality lim-
cese of Charlotte
This discharge may at-
Cath- J I0future
allocations in this
olic Conference Cen
ion of the Catawba Riv-
WWTP Catawba
asin.
)050920 ri\
(DioceseC15511
U
Charlotte Tr
3-
Country -Club, Ina. Cat
Lane, Hickory, NC 286(
'
9 Caarttty Club WWT.Bir
are water quality limited. las applied for renewal
This discharge may affect NPDES permit NCO0714
3wba
future allc;cations in this por- for the Catholic Conferen
tion of the Catawba River Center WWTP in Cataw
Basin. County. This permitted
Pub: February 18, 2005. citity discharges 20,000 g
In— n'' I rine IrpAtpd w2s

Subject: Marshall Station draft permit, NCO04987
From: [e-mail]
Date: Thu, 24 Feb 2005 14:48:19 -0500
To: [e-mail]
CC: [e-mail]
Sergi,
I have no comments on this permit.
Karrie-Jo Robinson -Shell, P.E.
I of 1
imap://sergei. chemikov%40dwq. [e-mail]:143/f...
2/24/2005 3.06 PM

WA74ter- m�lq��� Michael F. Easley, Governor
O� + �QG State of North Carolina
Rld�aq� c ice
0 William G. Ross, Jr., Secretary
�- ��05 Department of Environment and Natural Resources
O .0 FEB 17 Alan W. Klimek, P.E., Director
Division of Water Quality
P��G39Lc V13tc-7 S SPP Y
December 21, 2004
J ►J_ • ter,�
To: Britt Setzer
NC DENR / DEH / Regional Engineer
Mooresville Regional Office
From Sergei Cherrvkov
NPDES Unit
Subject: Review of Draft NPDES Permit NC0004987
Marshall Steam Station
1,
fEB222 P
005
...•�
Please indicate below your agency's position or viewpoint on the draft permit and return this form by April 4,
2005. If you have any questions on the draft permit, please contact me at telephone number [phone],
extension 594 or via e-mail at sergei [e-mail].
RESPONSE: (Check one)
Concur with the issuance of this permit provided the facility is operated and maintained properly, the stated
effluent limits are met prior to discharge, and the discharge does not contravene the designated water quality
standards.
F-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:
? IV—
Sinned Date: Z G? le -15-
1617
l dam'
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES

•
To: Permits and Engineering Unit
Water Quality Section
Attention: -Carolyn Bryant
SOC PRIORITY PROJECT: No
Date: January 21, 2005
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Catawba
NPDES Permit No.: NC0004987
MRO No.: 04-119
PART I - GENERAL INFORMATION
1. Facility and address: Marshall Steam Station
% Duke Power Company
13339 Hagers Ferry Road
Huntersvr7le, N.C. 28078
2. Date of investigation: January 12, 2005
3. Report prepared by: Samar Bou-Ghazale, Env_ Eng. I ,
DO
JAN 2 5 2005
I •
PONT SOURCE BRANCH
x.
4. Person contacted and Telephone Number: Robert Wylie, [phone]:
5. Directions to site: The plant is on the right (north) side of Hwy 150 directly across from
the junction of Hwy 150 and SR 1841 (Kiser Island Road) east of the community of
Terrell.
6. Discharge Point(s), List for all discharge Points: -
Outfall 001 Outfall 002 Outfall002A Outfall002B Outfall 003
Latitude: 350 35'43" 350 36'21" 350 35'51" 350 35 51" 350 35'52"
Longitude: 80° 5752" 80° 57'357 80° 57'36" 800 57'34 800 57'47"
Attach a USGS Map Extract and indicate treatment plant site and discharge point on map.
USGS Quad No.: E 15 SW USGS: Lake Norman North
7. Site size and expansion area consistent with application: Yes. Sufficient area
exists for expansion, if necessary.
8. Topography (relationship to flood plain included): Gently rolling, 5-10% slopes.

,. : nl:, ,
f
e, '�
�t
�

Page Two
9. Location of nearest dwelling: None within 1000 feet of the site.
10. Receiving stream or affected surface waters: Catawba River (Lake Norman)
a. Classification: WS -IV and B
b. River Basin and Subbasin No.: Catawba 030832
C. Describe receiving stream features and pertinent downstream uses: Outfall 002
and 003 enter a segment of Lake Norman used as the cooling water source for the
steam station. The receiving waters are not used for any type of recreational
purposes (such as swimming, fishing, boating, etc.) as this area of the lake is
separated from the main body of the lake by a concrete retaining wall that allows
cooler waters from the bottom of the lake to pass through the power generators.
Outfall 001 enters a segment of Lake Norman that is separated from the main body
of the Lake by a floating boom. Public access to this lake area is restricted by the
boom.
PART H - DESCRIPTION OF DISCHARGEANDTREATMENT WORKS
1. a. Volume of wastewater: 1072.7 MGD (outfall 001)
V.9 MGD (outfall 002)
(outfalls 002A & 002B)
0.2 MGD (outfall 003)
*Emergency flow only (yard sump overflow)
b. What is the current permitted capacity: Flow is not limited in the Permit for any
outfall. Outfall 001 consists of condenser cooling water and intake screen backwash
water. Outfall 002 is the ash -settling basin discharge, consisting of wastewater from
the scrubber air pollution control systems, ion exchange water treatment system, water
treatment evaporator blowdown, laboratory and sampling streams, boiler blowdown,
sanitary, and storm water. Internal outfall 004 consists of treated Flue Gas
Desulfurization (FGD) wet scrubber wastewater and is directed to outfall 002.
Outfalls 002A & 002B are the yard drain sump emergency overflows. Outfall 003 is
the Unit 4 ID Fan Control House cooling water.
c. Actual treatment capacity of current facility (current design capacity): N/A
d. Date(s) and construction activities allowed by previous ATCs issued in the previous
two years: An ATC was issued on August 10, 2004 for construction of the following:
1. Wastewater pumping station
2. Two 1.73 million gallon equalization basins

Page Three
3. Flow splitter box
4. Three (3) 3 -cell, 4.5 acre wetland treatment trains operated in parallel;
5. Internal outfall monitoring station; and
6. All necessary plants, piping, valves, and appurtenances.
e. Description of existing or substantially constructed WWT facilities: The only
existing WWT facilities consist of an aerated lagoon for domestic wastewater
disposal followed by an ash -settling/ disposal basin with CO2 for pH adjustment
prior to discharge (outfall 002).
f. Description of proposed WWT facilities: None at the present time.
g. Possible toxic impacts to surface waters: None expected.
2. Residual handling and utilization/disposal scheme: Ash removed from the ash disposal
basin is currently used for a variety ofpurposes as authorized by Permit No. WQ0000452.
3. Treatment Plant Classification: Class I (No change from previous rating)
4. SIC Code(s): 4911 Wastewater Code(s): Primary: 14, Secondary: 68, 16, 69
5. MTU Code(s); 31000
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies
involved (municipals only)? No
2. Special monitoring or limitations (including toxicity) requests:
a. DPC requests monitoring reduction for oil & grease and phosphorus from monthly to
quarterly at outfall 002. The justification for a reduction in monitoring is that oil &
grease monitoring data from September 2001 to August 2004 has been "less than
detection". Also, monitoring for phosphorus has shown no upward trends.
b.- DPC requests continuation of the thermal limitations that are presently in the NPDES
permit. (An assessment report of balanced and indigenous populations in Lake
Norman near Marshall Steam Station has been submitted by Duke power with the
permit renewal). According to the submitted report, the results of data analyses for
fish population and macroinvertebrates support continuation of the existing permitted
thermal limits.

o x �' ti i
s

Page Four
3. Important SOC/JOC or Compliance Schedule dates: N/A
4. Alternative Analysis Evaluation: There are no permit requirements at this time to evaluate
alternatives to wastewater discharges since the facility is not in substantial non-
compliance.
oncompliance.
PART IV - EVALUATION AND RECOMMENDATIONS
Duke Power has requested renewal of the subject permit. There have been no changes to
the existing WWT facilities since the permit was last renewed. Duke has requested modifications
to the monitoring contained in the current permit (see Part III, No. 2 (a), (b) above). Review and
approval of these monitoring changes should be made by the NPDES Unit.
The flue gas desulfurization system (FGD) and the wetlands system were being
constructed at the time of the site investigation. According to Mr. Wylie, the first scrubber
system will be operational by October 2006. The last of the three (3) remaining scrubbers will be
completed by the end of 2007. Also, the wetland system will be ready by the end of 2005.
Pending receipt and approval by the NPDES Unit, it is recommended that the permit be
renewed as requested.
a
Signature of ReporMeparer Date
Water Quality gional Supervisor Date

,,• ,� .' r
,. . .
.a

OGB
227�7--
Duke Power Corpomfim
Receiving�ztrrtuu
Catawba River
Receiving Streqrn
Catawhi River
Latittkie:
35"35'42'
Laitude:
35'35'57"
14',cemu
Catawba River
Receiving Stmam
Catawba River
Lititule
35'36'22"
Utitixle
35'35'5 1"
Duke Power Corpomfim

'DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0004987
Facility Information
Applicant/Facility Name:
Duke Power Company — Marshall Steam Station
Applicant Address:
13339 Hagers Ferry Road, Huntersville, NC
Facility Address:
8320 E. NC Highway 150, Terrell, NC 28682
Permitted Flow
Not Limited
Type of Waster
100% Industrial
Facility/Permit Status:
Renewal
County:
Catawba
SUMMARY OF FACILITY AND WASTELOAD ALLOCATION
Duke Power Company operates Marshall Steam Station in Catawba County. The Station operates five
outfalls. These outfalls are 001, 002, 002a, 002b, and 003. The permitted outfalls are summarized below.
• Outfall 001— Condenser Cooling Water (CCW) Units 1— 4:
The CCW system is a once- through, non -contact cooling water system, which condenses steam from
the condensers and other selected heat exchangers. When the station is operating at full power, it has a
design capacity to pump 1463 MGD (1.016 MGPM) of cooling water through the network of tubes that
runs through the condenser and selected heat exchangers. The raw cooling water is returned to the lake.
No biocides or other chemicals are used in the condenser cooling water.
Units 1 and 2 operate two CCW pumps each while units 3 and 4 operate three pumps. The operational
schedule for these pumps is dependent on the intake water temperature and on the unit loads.
Depending on the electrical demand, pumps are operated to maximize station efficiency and to assure
balanced and indigenous populations are maintained in Lake Norman. Each unit is on an independent
system to avoid a system trip that would suddenly reduce the discharge flow at outfall 001. This practice
leads to a higher reliability factor for the units and protection of aquatic life taking refuge in the discharge
canal during cold weather. Flow recorded on the monthly Discharge Monitoring Reports is based on
CCW pump run times.
• Outfall 002 — Ash Basin:
The station ash basin accommodates flows from two yard -drain sumps, an ash removal system, low
volume wastes and non -point source stormwater. Low volume waste 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,
and recirculating house service water systems. Total average influent from these sources combined is
approximately 6.7 MGD. At times, due to unit loads, rainfall, evaporation, and seepage of ash basin
ponds, the effluent flow may vary from the influent flow.
• Outfall 004 (internal outfall) — FGD system discharge into Ash Basin:
In association with Clean Smokestacks legislation, Duke Energy will be installing a flu -gas desulfurization
(FGD) wet scrubber. This scrubber will generate a wastewater needing treatment prior to discharge. An
Marshall Steam Station Fact Sheet
NPDES Renewal
Page 1
Miscellaneous
Receiving Stream:
Lake Norman
Regional Office:
Mooresville
Stream Classification:
WS -IV & B CA
USGS To o Quad:
303(d) Listed?:
No
Permit Writer:
Sergei Chernikov
Subbasin.
03-08-32
Date:
December 14, 2004
Drainage Area (m12):
NA
_
Q
� b,
Summer 7Q10 (cfs) Release (60 cfs)`
Winter 7Q10 (cfs) : NA
Average Flow (cfs): NA
IWC ft: See Below
SUMMARY OF FACILITY AND WASTELOAD ALLOCATION
Duke Power Company operates Marshall Steam Station in Catawba County. The Station operates five
outfalls. These outfalls are 001, 002, 002a, 002b, and 003. The permitted outfalls are summarized below.
• Outfall 001— Condenser Cooling Water (CCW) Units 1— 4:
The CCW system is a once- through, non -contact cooling water system, which condenses steam from
the condensers and other selected heat exchangers. When the station is operating at full power, it has a
design capacity to pump 1463 MGD (1.016 MGPM) of cooling water through the network of tubes that
runs through the condenser and selected heat exchangers. The raw cooling water is returned to the lake.
No biocides or other chemicals are used in the condenser cooling water.
Units 1 and 2 operate two CCW pumps each while units 3 and 4 operate three pumps. The operational
schedule for these pumps is dependent on the intake water temperature and on the unit loads.
Depending on the electrical demand, pumps are operated to maximize station efficiency and to assure
balanced and indigenous populations are maintained in Lake Norman. Each unit is on an independent
system to avoid a system trip that would suddenly reduce the discharge flow at outfall 001. This practice
leads to a higher reliability factor for the units and protection of aquatic life taking refuge in the discharge
canal during cold weather. Flow recorded on the monthly Discharge Monitoring Reports is based on
CCW pump run times.
• Outfall 002 — Ash Basin:
The station ash basin accommodates flows from two yard -drain sumps, an ash removal system, low
volume wastes and non -point source stormwater. Low volume waste 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,
and recirculating house service water systems. Total average influent from these sources combined is
approximately 6.7 MGD. At times, due to unit loads, rainfall, evaporation, and seepage of ash basin
ponds, the effluent flow may vary from the influent flow.
• Outfall 004 (internal outfall) — FGD system discharge into Ash Basin:
In association with Clean Smokestacks legislation, Duke Energy will be installing a flu -gas desulfurization
(FGD) wet scrubber. This scrubber will generate a wastewater needing treatment prior to discharge. An
Marshall Steam Station Fact Sheet
NPDES Renewal
Page 1

internal outfall (004) has been established for the effluent from the FGD treatment system Weekly
influent and effluent monitoring has been established at outfall 004 for flow, arsenic, cadmium,
chromium, chloride, mercury, nickel, selenium, silver, suspended solids, and zinc. This influent/effluent
monitoring should allow the facility to assess the effectiveness of its FGD treatment system
Internal outfall 004 will discharge to the ash settling basin which is currently permitted as outfall 002.
Monitoring for the above mentioned parameters has been installed for outfall 002 and is required only when
outfall 004 is discharging.
Duke Energy has been working with faculty from Clemson University to identify FGD wastewater treatment
options. Pilot scale constructed wetlands have provided positive results. Current plans are to construct a
clarifier, equalization basin, and constructed wetland to treat the FGD wastewater.
The yard -drain sumps are concrete structures having four level controlled pumps each that direct wastewater
from the powerhouse area to the ash basin. These pumps are operated on a rotating basis. Usually two
pumps are set so that one pump is primary and the other is backup. After a selected period the controls are
changed so that different pumps are utilized. The yard -drain sumps collect wastewater from many sources,
such as the filtered water system, turbine and boiler room sumps, miscellaneous equipment cooling water,.
foundation drainage, low volume wastes, and tunnel dewatering. The yard -drain sumps also collect some
storm -water runoff from the coal pile (coal pile runoff), rail access, and powerhouse roofs and pavement.
Groundwater from a foundation drainage system under the track hopper is also intermittently discharged to
the yard -drain sumps. The combined average flow from all sources tied to the yard -drain sumps is
approximately 1.9 MGD, which is pumped to the ash basin for physical and biological treatment.
The turbine room sumps collect approximately 0.2 MGD of wastewater. This wastewater comes from non -
contact cooling water (from Units 1 & 2 boiler feed -pump turbine lube oil coolers) and floor drains. Floor
drains contain boiler blowdown, leakage from seals, equipment cooling water, condensate from the feed -
water system, low volume wastewater, boiler room sump overflow, emergency fire fighting water, general
mechanical maintenance activities, miscellaneous plant wastes and area wash -down water.
The average flow pumped from the boiler room sumps directly to the ash basin is approximately 1.3 MGD.
The sources of input to the boiler room sumps includes the following:
Water Treatment System — the station make-up water treatment system consists of a clarifier,
three gravity filters, two sets of activated carbon filters, and two sets of demineralizers. The
water treatment wastes consist of floc and sedimentation, filter backwash, and demineralizer
regeneration wastes. Make-up water is supplied to the boilers to generate steam to turn the
turbines. On occasion a vendor may be used with a mobile water treatment unit to augment the
facility water treatment capacity. Any vendor will use traditional water treatment methods,
chemicals, and disposal methods.
• Miscellaneous Waste Streams:
• Closed system drainage, cleanings, testing containing corrosion inhibitors (CalgonCS),
biocides (Calgon H-510), cleanings (small heat exchangers), dispersant (polycrylamide),
wetting agent (sodium lauryl sulfate), detergent (tri -sodium phosphate), and leak testing
(disodium fluorescing dye);
• Turbine room sump overflow,
• Boiler seal water (trace oil and grease);
• Miscellaneous system leakages (small leaks from pump packings and seals, valve seals, pipe
connections);
• Moisture separators on air compressor precipitators;
• Floor wash water;
• Emergency fire fighting water;
• Pyrite (ash) removal system overflow;
• Low volume wastewater.
Marshall Stearn Station Fact Sheet
NPLDES Renewal
Page 2

• Chemical makeup tanks and drum rinsate - intermittent rinse water containing small amounts of
aluminum sulfate, sodium hydroxide, hydrazine, and ammonium hydroxide.
Boiler blowdown — Primarily when units 1 & 2 startup and until water chemistry stabilizers the
blowdown from these boilers is allowed to flash in a blowdown tank During startup a
significant portion of this blowdown steam is vented to the atmosphere. After water chemistry
has stabilized, blowdown venting is minimal and condensate flow is small. Trace amounts of
hydrazine, ammonia, and silica oxide may be present in the condensate. The combined
condensate flow from blowdown amounts to an average of approximately 0.002 MGD. This
flow is routed to the boiler room sump and then to the ash basin.
• Boiler cleaning — Boilers # 1, # 2, # 3, and # 4 at the station are chemically cleaned on an as
needed basis. Tube inspections are performed during outages, which indicate when cleaning
needs scheduling. Boilers # 1 and # 2 are controlled circulation boilers and boilers # 3 and # 4
are supercritical boilers. The wastes produced from a boiler cleaning are pumped to the yard
sumps and then to the ash basin.
The ash basin collects stormwater flows from the yard drainage basin, ash removal lines and rainfall runoff
from the basin watershed area. A total of 14.7 acres drain to the yard sumps with an average daily runoff
estimated at 0.03 MGD. The average daily runoff is calculated based on an annual rainfall of 49 inches with
1.0 and 0.5 runoff coefficients applied appropriately. Trace amounts of oil and grease maybe present in the
first flush of stormwater.
Once -through, non -contact cooling water is supplied to eight induced draft (ID) fan motor bearings to
remove excess heat. No chemicals are added to the once -through raw lake water. The rate of flow through
the ID fan heat exchangers that discharges to the yard -drain sumps is approximately 0.08 MGD, which is
pumped to the ash basin.
The track hopper sump collects groundwater from a foundation drain system underneath the track hopper.
The flow is usually intermittent; however, the pump capacity is 100 gpm On a daily basis it is estimated that
the run time is only 50%, which would correspond to a flow of 0.07 MGD to the yard -drain sumps; then to
the ash basin.
In the event that maintenance activities are needed in the intake or discharge tunnels, a dewatering sump is
provided to remove water from the tunnels. Raw water in the tunnels can be pumped to the yard -drain
sumps that ultimately discharge to the ash basin.
Bore sonic testing of turbine rotors is infrequent, occurring approximately once every 5 years. Demineralized
water is mixed with a corrosion inhibitor, e.g. Immunol 1228, at a ratio of 100 parts water to 1 part inhibitor.
The mixture is applied to the turbine rotors. The excess is drained and mixed with low volume wastewater
and discharged to the ash basin via the yard -drain sumps.
The station utilizes electrostatic precipitators as its air pollution control devices. Under normal plant
operations, the dry 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 the fly ash can be sluiced to the .ash basin. Bottom ash from the
boilers is usually sluiced with water to a holding cell for recycling activities. Pyrites from the mills are sluiced
with water to an ash basin settling cell. Approximately 2.5 MGD of bottom ash and pyrite sluice is pumped
through large steel pipes (ash lines) directly to the ash basin settling cell. Once -through, non -contact cooling
water from the coal pulverizing mill is discharged to the bottom ash hopper and pumped to the ash basin.
The electrostatic precipitators are normally cleaned by mechanically vibrating the wires and rapping 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 sump.
Marshall Steam Station Fact Sheet
NPDES Renewal
Page 3

A new sanitary waste treatment system was installed during the term of the previous NPDES permit, thus
eliminating the package plant near the intake structure of the plant. An aerated basin provides treatment with
a 30 — day retention time and has a total volume of 587,000 gallons. Effluent from the aerated basin is
polished further through additional residence time in the ash basin. The new system is designed for 6100
gpd (normal) and 13500 gpd (outage).
The powerhouse lift station was installed as a central collection point to receive all the sanitary waste from
the station and pump it to the aerated basin. The present lift station serving the vendor facilities and Units 3
and 4 were upgraded.
The sanitary system accommodates wastewater flow from the following courses:
• General Plant sanitary wastewater;
Vendor facilities sanitary wastewater, and
Laboratory drains (small amounts of laboratory chemicals used to test wastewater effluents and
high purity boiler water).
Non -point sources of stormwater to the ash basin includes coal pile runoff, a pond area of 82.3 acres and an
up -gradient watershed are of 1097.7 acres. The estimate for stormwater runoff is based on forty-nine inches
of rain per year with a 1.0 and 0.5 runoff coefficient for the pond area and up -gradient watershed,
respectively. The average non -point source storm -water input for the ash basin is estimated at 2.3 MGD.
The coal pile covers an area of approximately 33 acres with an estimated stormwater runoff to the ash basin
of 0.06 MGD.
• Outfall 002a — Sump # 1 Overflow.
This outfall discharges very infrequent overflows of yard sump number 1. .The overflow generally
consists of the same wastewaters discharged bythe ash basin.
• Outfall 002b — Sump # 2 Overflow.
This outfall discharges very infrequent overflows of yard sump number 2. The overflow generally
consists of the same wastewaters discharged by the ash basin.
• Outfall 003 — Unit 4 ID Fan Control House Cooling Water:
Once -through, non -contact cooling water is supplied to the Unit 4 induced draft (ID) fan motor control -
house equipment to remove excess heat. No chemicals are added to the once -through raw lake water.
The flow rate through the control equipment that discharges to Lake Norman is approximately 0.2
MGD.
One of the permit requirements is to perform an assessment of balanced and indigenous populations in Lake
Norman. The report states that "the thermal regimes resulting from the operation of the MSS (Marshall
Steam Station have supported the protection and propagation of a balanced and indigenous fish community
in Lake Norman". The Environmental Sciences Section is currently reviewing the report.
BASIS FOR EFFLUENT LIMITS
• Outfall 001 — Condenser Cooling Water (CCS Units 1 — 4:
Currently, only temperature is limited in this outfall. Summer and winter thermal limits have been
established in support of the 316(A) temperature variance issued by EPA in May of 1975. The
determination noted 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." Continued
implementation of the aforementioned thermal variance is supported by the "Assessment of Balanced
and Indigenous Populations in Lake Norman near Marshall Steam Station." Furthermore, an evaluation
of the downstream temperature of Lake Norman suggests that Marshall Steam Station is not appreciably
elevating instream temperature.
Marshall Steam Station Fact Sheet
NPDES Renewal
Pabe 4

A free available chlorine limit is currently part of the effluent limitations for this outfall. 40 CFR 423.12 (b)
(6) establishes maximum free available chlorine concentrations for discharges of once -through cooling water.
These maximum values are 0.5 mg/L and 0.2 mg/L daily maximum and monthly average respectively-
Inclusion
espectivelyInclusion of these limits is merely matter of record keeping as the permit does not authorize chlorination of
the once -through cooling water. These limits will be footnoted such that monitoring is only required if the
facility proposes to implement chlorination of its once -through cooling water.
• Outfall 002 — Ash Basin:
The existing permit limits oil & grease, TSS, total copper, and total iron at this outfall. Limits for Cu and
Fe are consistent with federal guidelines.
• Outfalls 002a and 002b — Yard -Sump Overflows:
On occasion, the yard -sumps at the station experience overflows. These overflows occur rarely, typically
once per year, and can range in time from less than one hour to several hours. Late in 1998, the Division
developed a permitting strategy for these overflows. Analytical monitoring is required for flow, pK and
TSS for all overflows lasting longer than an hour. When TSS is reported as greater than 100 mg/L,
monitoring for iron is required. All overflows, regardless of time length, are reported to the DWQ
regional office.
• Outfalls 003 — Non -Contact Cooling Water.
Limitations for this outfall are consistent with non -contact cooling water requirements defined in the
federal guidelines.
TOXICITY TESTING:
Current Requirement: Outfall 002 — Chronic P/F @ 12% using Ceriodaphnia
Recommended Requirement: Outfall 002 — Chronic P/F @ 12% using Ceriodaphnia
No changes in the toxicity testing requirements is recommended. This facility has passed all toxicity tests
during previous permit cycle.
COMPLIANCE SUMMARY:
A review of this facility's effluent data indicates an excellent compliance history with no noted permit limit
violations during the review period (1/2001-11/2004).
INSTREAM MONITORING:
None Required
REASONABLE POTENTIAL ANALYSIS (RPA)
The Division conducted EPA -recommended analyses to determine the reasonable potential for toxicants to
be discharged by this facility from outfall 002. Calculations included: arsenic, selenium, copper, zinc, and
iron. Results suggest no reasonable potential for the facltyto discharge any of the above toxicants.
REQUESTED MODIFICATIONS/ADDITIONS
With the permit application for renewal, Duke Power has requested the following Monitoring Frequencies
modifications:
Parameter PresentProposed
OR & Grease Monthly Quarterly
Phosphorus Monthly Quarterly
Request by the permittee to reduce monitoring from Monthly to Quarterly for O&G and phosphorus was
granted.
PROPOSED CHANGES:
Outfall 002: The monitoring frequency for total O&G and phosphorus has been reduced from monthly to
quarterly.
Marshall Steam Station Pact Sheet
NPDES Renewal
Page 5

PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: February, 2005 (est.)
Permit Scheduled to Issue: April 4, 2005 (est)
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please contact Sergei
Cliernikov at [phone] ext. 594.
REGIONAL OFFICE COMMENT:
Z/H,/f11-7e) ✓S );4, ocf %y /-L ODj t C 61s"
T1167 ovty MEAd s 7-0 �C o�s72,y G���G�.9�✓�� w��7¢ 7h
ST4 /ZFP /s 77M6 UG t/ N1 d/U Il�2r,✓f� l�� u��c'r''�''/
DATE:
EPA REGION IV COMMENT:
t,c
NAME: DATE:l �--�
N-lar:shall Steam Station Fact Sheet
NPDES Renewal
Pa -e 6

A free available chlorine limit is currently part of the effluent limitations for this outfall. 40 CFR 423.12 (4 ! .'
(6) establishes maximum free available chlorine concentrations for discharges of once -through cooling water.
These maximum values are 0.5 mg/L and 0.2 mg/L daily maximum and monthly average respectively.
Inclusion of these limits is merely a matter of record keeping as the permit does not authorize chlorination of
the once -through cooling water. These limits will be footnoted such that monitoring is only required if the
facility proposes to implement chlorination of its once -through cooling water.
• Outfall 002 — Ash Basin:
The existing permit limits oil & grease, TSS, total copper, and total iron at this outfall. Limits for Cu and
Fe are consistent with federal guidelines.
• Outfalls 002a and 002b — Yard -Sump Overflows:
On occasion, the yard -sumps at the station experience overflows. These overflows occur rarely, typically
once per year, and can range in time from less than one hour to.several hours. Late in 1998, the Division
developed a permitting strategy for these overflows. Analytical monitoring is required for flow, pK and
TSS for all overflows lasting longer than an hour. When TSS is reported as greater than 100 mg/L,
monitoring for iron is required. All overflows, regardless of time length, are reported to the DWQ
regional office.
• Outfalls 003 — Non -Contact Cooling Water:
Limitations for this outfall are consistent with non -contact cooling water requirements defined in the
federal guidelines.
TOXICITY TESTING:
Current Requirement: Outfall 002 — Chronic P/F @ 12% using Ceriodaphnia
Recommended Requirement: Outfall 002 — Chronic P/F @ 12% using Ceriodaphnia
No changes in the toxicity testing requirements is recommended. This facility has passed all toxicity tests
during previous permit cycle.
COMPLIANCE SUNUVIARY:
A review of this facility's effluent data indicates an excellent compliance history with no noted permit limit
violations during the review period (1/2001-11/2004).
INSTREAM MONITORING:
None Required
REASONABLE POTENTIAL ANALYSIS (RPAJ
The Division conducted EPA -recommended analyses to determine the reasonable potential for toxicants to
be discharged by this facility from outfall 002. Calculations included: arsenic, selenium, copper, zinc, and
iron. Results suggest no 7wonable potential for the facility to discharge any of the above toxicants.
REQUESTED MODIFICATIONS/ADDITIONS
With the permit application for renewal, Duke Power has requested the following Monitoring Frequencies
modifications:
Parameter Present a=,- Pro ose'd`
Oil & Grease Monthly Quarterly
Phosphorus I Monthly Quarterly
Request by the permittee to reduce monitoring from Monthly to Quarterly for O&G and phosphorus was
granted.
PROPOSED CHANGES:
Owfall 002: The monitoring frequency for total O&G and phosphorus has been reduced from monthly to
quarterly.
:Marshall Steam Station Fact Sheet
NPDES Renewal
Pane :5

REASONABLE POTENTIAL ANALYSIS
Marshall Steam Station
Outfall 001
NC0004987
Qw = 5.28 MGD
Time Period 2000-2004 DMRs
Qw (MGD) 5.28
WWTP Class IV
7Q10S (cfs) 60
IWC (%) @ 7Q10S 12.003
7Q10W (cfs) 0
@ 7Q10W NIA
30Q2 (cfs) 0
@ 30Q2 NIA
Avg. Stream Flow, QA (cfs) 0
@ QA NIA
Rec'ving Stream Catawba River (Lake Norman)
Stream Class WS -IV and B CA
Legend.
C = Carcinogenic
NC = Non -carcinogenic
A =Aesthetic
" Freshwater Discharge
4987-rpa-2005,rpa
12/14/2004
STANDARDS &
PARAMETER
TYPE
CRITERIA (2)
PQL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
(1)
NoWOS/ liFAV/
n #Det. MaxPredCw AllowableCw
Chronic Acute
Arsenic
NC
50 j/
ug/L
20 20
55.5
Acute: N/A
% f
/ V U (Y I
WA = 2r7 f�lU
_ _ _ _ _
Chronic: 417
------ -----------------------
tf
tl
Acute: 7
/ ,
Copper
NC
7 AL 7.3
ug/L
14 13
91.0
�J
/✓ , f Y
Chronic: 58
---- — — — ----
Acute: N/A
-
Iron
NC
1000.000
0.0002
ug/L
14 14
924.1800
/
-
Chronic: 8,331
--
---�Y— ----------------------
Selenium
NC
5.0 56
ug/L
20 19
15.6
Acute: 56
— ---------
/ r
1 - f t
--------------------------=-
—
Chronic: 42
Acute: 67
Zinc
NC
50 AL 67
uglL
20 5
167.0
Chronic: 417
^�
Legend.
C = Carcinogenic
NC = Non -carcinogenic
A =Aesthetic
" Freshwater Discharge
4987-rpa-2005,rpa
12/14/2004

REASONABLE POTENTIAL ANALYSIS
4987-rpa-2005, data
1 - 12/14/2004
Arsenic
Date_
Data
BDL=1/2DL
Results
1 j
_
5:88'1
5.9
Std Dev.
4.3453
2!
7.11'
7.1
Mean
6.3075
3,
4.42'
4.4
C.V.
0.6889
4
2.10,
2.1
n
20
5
3.30'
3.3
6
2.471
2.5
Mult Factor =
2.5600
T
9,66,
9.7
Max. Value
21.7 ug/L
8;
6.W
6.2
Max. Pred Cw
55.5 ug/L
9�
21.67'
21.7
10k
9.24;
9.2
11
9.44'
9.4
12�
2.81:
2.8
13
4.88,
4.9
14
5.37
5.4
151
7.40,
7.4
16
6.0V
6.0
17;
7.97'
8.0
183
4.02'
4.0
19+
2.04'
2.0
201
4.17;
4.2
21!
22,
-
231
24
251
263
27"
28
29°
30
31
32'
33;
343
35�
36,
37i
38
39
40",
41!
421
43
44'
45;
i
'46
'
47;'
481
49!
50
i
511
52'
53
54'
55,
56;'
57
58'
59;
;
60:
199,
200;
4987-rpa-2005, data
1 - 12/14/2004

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Whole Effluent Toxicity Testing Self-Monitoring Summary
November 15, 2004
FACILITY REQUIREMENT
YEAR JAN
FEB
MAR_
APR
MAY_
JUN
JUL
AUG
_ SEP
OCT
NOV
DEC
Deer Chase Subdivision WWTP chr lim: 90%
2000 >90
-
-
>100
-
-
Pass
-
-
Pass
--
-
NC0063746/001 Begin:6/1/2003 Frequency:Q Jan Apr Jul Oct
+ NonComp:Single
2001 Fail
>100
>100
Pass
-
-
Pass
-
-
Late
Fail,>100
>100
County: Wake Region: RRO Subbasin: NEU02
2002 Pass
-
-
Pass
-
-
Pass
--
-
Late
Pass
-•-
PF: 0.05 Special
2003 Late
Fail
94.9,>100
Pass
-
-
Pass
--
-
Pass
-
-
7Q10: 0.0 IWC(%) 90 Order:
2004 Late
Late
Pass
Pass
--
--
Pass
--•
-
Delta Mills chr lim: 1 I%; if exp I.5MGD chr lim 16%
2000 -
-
4.1
<3
Late
15.6,15.6
-
•--
31
---
-••
15.6
NC0006190/001 Begin:6/1/2002 Frequency: Q Mar Jun Sep Dec
+ NonComp:Single
2001 -
-
31.1
-
-
15.6
-
-
15.6
-
-
31.1
County: Catawba Region: MRO Subbasin: CTB35
2002 ---
-
31.1
--
---
>44
-
---
>44
-
•--
15.6
PF: 1.0 Special
2003 -
-
7.8
31.1
15.6
15.6
-
•-•
4.1
15.6
7.8
31.1
7Q10: 12 IWC(%) 11 Order:
2004 --•
-
15.6
-
---
15.6
--
•--
31.1
Denton WWTP chr lim: 90%
2000 -
21.2
>90
--
36.7
>90
---
Pass
-
--
Pass
-
NC0026689/001 Begin: 10/1/2004 Frequency: Q Feb May Aug Nov
+ NonComp:Single
2001 -
Pass
-
-
Pass
-
---
Fail,>100
NR
Pass
Pass
-
County: Davidson Region: WSRO Subbasin: YAD08
2002 -
Fail
>100
NR/>100
Pass
-
---
Pass
-
-
Pass
-
PF: 0.8 Special
2003 -
Fail
82.2
>100
>100
-
---
Pass
--
-
Pass
-
7QI0: 0.0 1WC(%) 100 Order:
2004 -
Pass,94.9(p)
--
-
Pass
-
--
Pass
--
Dixie Yarns, Inc, chr lim: 90%
2000 Fail
Pass
-
Pass
-
-
Fail
>100
>100
NR
Pass
-
NC0083763/001 Begin:7/1/2004 Frequency:Q Jan Apr Jul Oct
+ NonComp:Single
2001 Fail,Pass
>100
97.5
Late
H
H
H
--
H
Fail
>100
>100
County: Stanly Region: MRO Subbasin: YAD12
2002 Pass
•-
-
Pass
-
-
NR
Pass
--
Pass
-
-
PF: 0.072 Special
2003 pass
-
--
Pass
---
-
Pass
--
---
Fail
Invalid
H
7QI0: 0 IWC(%) 100 Order:
2004 H
H
H
Fail
Invalid
>100
79.4,lnvalid
Pass
-
Duke Power-Allen 002 chr lim: 16%
2000 Pass
-
-
Invalid
-
--
Late
Pass
-
Pass
•-
-
NC0004979/002 Begin:7/1/2002 Frequency: Q Jan Apr Jul Oct
+ NonComp:Single
2001 Pass
-
--
Pass
---
--
Pass
---
-
Fail
>64
>64
County: Gaston Region: MRO Subbasin: CTB34
2002 >92
-
-
>64
-
-
Pass
-
-
Pass
-
-
PF: 11.6 Special
2003 Pass
-
--
Pass
-
-•
Pass
-
--
Fail
45.2
>64
7Q10: 95.0 IWC(%) 16 Order:
2004 Pass
-
--
Pass
-
-
Pass
-
-
Duke Power-Belews Creek/003 chr lim: 19%
2000 --
Pass
-
-
Pass
--
---
Late
Pass
-
Pass
-
NC0024406/003 Begin:6/1/2002 Frequency:Q Feb May Aug Nov
+ NonComp:Single
2001 -
Pass
-
-
Pass
-
--
Pass
-
-
Pass
-
County: Stokes Region: WSRO Subbasin: ROA01
2002 --
Pass
-
-
Pass
-
--•
>76
---
--
Pass
•-
PF: NA Special
2003 -
Pass
-
-
Pass
-
-
Pass
---
-
Pass
-
7Q10:80.0 IWC(%)NA Order:
2004 -
Pass
--
--
Pass
-
---
Pass
-
Duke Power -Buck Steam chr lim: 0.7%
2000 --
-
Invalid
--•
--
Pass
--
-
Pass
-
--
Pass
NC0004774/002 Begin:10/1/2004 Frequency: Q Mar Jun Sep Dec
+ NonComp:Single
2001 -
-
Pass
-
-
Pass
-
-
Pass
-
-
Pass
County: Rowan Region: MRO Subbasin: YAD04
2002 ---
-
>2.8
-
--
Pass
-
-
Pass
-
-
Pass
PF: NA Special
2003 -
--
Pass
-
--
Pass
-
-
Pass
--
--
Pass
7QI0: 1030 IWC(%) 0.598 Order:
2004 --
-
Pass
-
-
Pass
-
-
Pass
Duke Power-Cliffside chr lim: 5.6%
2000 ---
-
Invalid
-
--
Pass
-
--
Pass
-
-
Pass
NC0005088/002 Begin:3/1/1999 Frequency: Q Mar Jun Sep Dec
+ NonComp:Single
2001 -
-
Pass
--•
-
Pass
---
--
Pass
---
---
Pass
County: Rutherford Region: ARO Subbasin: BRD02
2002 --
-
Pass
-
-
>22.4
--•
-
Pass
-
-
Pass
PF: 8.8 Special
2003 -
--
Pass
-
--
Pass
---
---
Pass
---
---
Pass
7Q10:287 IWC(%)4.53 Order:
2004 --
-
Pass
-
---
Pass
-
-
Pass
Duke Power-Dan River chr lim: 1.04%
2000 -
-
Invalid
-
-
Pass
•--
-
Pass
-
-
Pass
NC0003468/002 Begin:9/l/2002 Frequency: Q Mar Jun Sep Dec
+ NonComp:Single
2001 -
--
Pass
---
---
Pass
•--
-
Pass
•-
-
Pass
County: Rockingham Region: WSRO Subbasin: ROA03
2002 -
-
Pass
-
-
Pass
---
-
Pass
-
-
Pass
PF; 1,8 Special
2003 -
--
Pass
---
--
Pass
--
--
Pass
--
--
Pass
7Q10: 314.0 IWC(%) 1.04 Order:
20114 -
-
Pass
-
-
Pass
-
-
Pass
Duke Power-Lincoln Turbine chr lim: 23%
2000 -
-
>92
-
---
>92
-
-
65.05
-
-••
65.05
NCO080781/001 Begin:11/1/2001 Frequency:Q Jan Apr Jul Oct
+ NonComp:Single
2001 ---
-
>92
-
'-
>92
-
-
>92
-
-
Late
County: Lincoln Region: MRO Subbasin: CTB33
2002 >92
-
>92
-
-
>92
--•
65
-
Pass
•--
--
PF: 0.4 Special
2003 -
Pass
-
-
Pass
-
Pass
-
-
-
--
Pass
7Q10:2.1 IWC(%)23 Order:
2004 >92
--
-
--
>92
--
---
-
>92
Duke Power -Marshall 002 chr lim: 12%
2000 ---
Pass
-
-
Pass
-
---
Pass
•-•
•-
Pass
--
NC0004987/002 Begin:2/1/2004 Frequency: Q Feb May Aug Nov
+ NonComp:Single
2001 -
Pass
-
-
Pass
-
-
Pass
-
-
Pass
---
County: Catawba Region: MRO Subbasin: CTB32
2002 -
Pass
-
--•
Pass
-
---
Pass
---
-
Pass
--
Pfd. 53 Special
2003 __
Pass
-
-
Pass
-
-
Pass
-
-
Pass
-
IIQ10: 60.0 IWC(%) 12.0 Order:
2004 -
Pass
-
--
Pass
-
-
Pass
-
Y Pre 2000 Data Available
LEGEND:
PERM = Permit Requirement LET = Administrative Letter - Target Frequency = Monitoring frequency: Q- Quarterly; M- Monthly; BM- Bimonthly; SA- Semiannually; A- Annually; OWD- Only when discharging; D- Discontinued monitoring requirement
Begin= First month required 7Q10 =Receiving stream low flow criterion (efs) += quarterly monitoring increases to monthly upon failure or NR Months that testing must occur -ex. Jan, Apr, Jul, Oct NonComp = Current Compliance Requirement
PF = Permitted flow, (MGD) IWC%= Instream waste concentration P/F = Pass/Fail test AC = Acute CHR = Chronic
Data Notation: f- Fathead Minnow; " - 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: I - Inactive, N - Newly Issued(To construct); H - Active but not discharging; t -More data available for month in question; - ORC signature needed
16

Re: Sawdust Addition to Condenser41C A o V���
Subject: Re: Sawdust Addition to Condenser
From: Jackie Nowell <[e-mail]>
Date: Wed, 14 Jul 2004 14:56:01 -0400
To: Ronald E Lewis <relewisI @duke-energy.com>
CC: [e-mail], Donna L Burrell <[e-mail]>, Monte W Neill <[e-mail]>, Dave
Goodrich <[e-mail]>
Hello Ron,
A review of the submitted data from the sawdust study shows that the addition of sawdust does not cause any
increase in the effluent values for TSS or BOD5. Based on that data, effluent monitoring for those two parameters
can be discontinued during future addtions of sawdust to the condenser tubes.
However, if the quantity of sawdust added should be greater than the highest value of 300 lbs noted in the data, DWQ
recommends that the pre and post monitoring for TSS and BOD5 be reinstated. Please contact me if any additional
questions.
Jackie Nowell
Ronald E Lewis wrote:
Jackie,
Per my phonemail message, I'm forwarding a note following discussion with
Mike Parker concerning our request to discontinue monitoring when sawdust
is added to the CCW system to temporarily plug small tube leaks. After
discussing with Mike Parker this request for Marshall Steam Station, we
determined that since you were involved in the approval of this protocol
for all the Duke Power stations you needed to be contacted to review this
request, . Please review the attached data and determine if monitoring can
be discontinued during this protocol.
If you need more information or wish to discuss further, please call me
[phone].
----- Forwarded by Ronald E Lewis/Gen/DukePower on 07/02/2004 10:52 AM
Ronald E
Lewis
To:
[e-mail]
02:21 cc: Donna L Burrell/Gen/DukePower@DukePower, Monte W
PM
Neill/Gen/DukePower@DukePower
Subject: Sawdust Addition to
Condenser
Mike,
Per my phone mail message, I'm forwarding monitoring results that were
collected when sawdust was used to plug small condenser tube leaks until
repairs could be done during an outage. Currently Unit #1 at Marshall
Steam Station has some small tube leaks. As currently permitted, Duke
plans to add sawdust to the CCW system to plug the small leaks, but would
like to do so without having to do pre and post monitoring, as required
previously. The attached document contains the results of the samples
collected during previous sawdust additions. As you can see, no apparent
significant impact occurred from the sawdust addition to the station
discharge Please advise, if addition of sawdust can proceed without
monitoring.
(See attached file: Sawdust Study.xls)
07/01/2004
1 of 1 7/14/2004 3:02 PM

Sawdust A,dditi✓on to Condenser
100
0-�
17' �S v
%N
A ` v
0v J-01 I
ubject: Sawdust Addition to Condenser Cdi �„► .,
From: Ronald E Lewis <relewis 1 @ duke-energy.com> i,
Date: Fri, 2 Jul 2004 11:28:07 -0400 q
To: [e-mail] S�
CC: [e-mail], Donna L Burrell <[e-mail]->,
Monte W Neill <mwneill @duke-energy.co > I j ✓ S _' (r/ 1 J
ki
Je,
Per my phonemail message, I'm111frrwarding a note following discussion
with
Mike Parker concerning our request to discontinue monitoring when
sawdust
is added to the CCW system to temporarily plug small tube leaks.
After
discussing with Mike Parker this request for Marshall Steam Station,
we
determined that since you were involved in the approval of this
protocol
for all the Duke Power stations you needed to be contacted to review
this
request, Please review the attached data and determine if
monitoring can
be discontinued during this protocol.
If you need more information or wish to discuss further, please call
me
[phone].
----- Forwarded by Ronald E Lewis/Gen/DukePower on 07/02/2004 10:52
AM
Ronald E Lewis
[e-mail]
07/01/2004 02:21
Burrell/Gen/DukePower@DukePower, Monte W
PM
Neill/Gen/DukePower@DukePower
Addition to Condenser
To.
CC: Donna L
Subject: Sawdust
1 of 2 7/6/2004 9:16 AM

Sawdust .Addition to Condenser
Mike,
Per my phone mail message, I'm forwarding monitoring results that
were
collected when sawdust was used to plug small condenser tube leaks
until
repairs could be done during an outage. Currently Unit #1 at
Marshall
Steam Station has some small tube leaks. As currently permitted,
Duke
plans to add sawdust to the CCW system to plug the small leaks, but
would
like to do so without having to do pre and post monitoring, as
required
previously. The attached document contains the results of the
samples
collected during previous sawdust additions. As you can see, no
apparent
significant impact occurred from the sawdust addition to the station.
discharge Please advise, if addition of sawdust can proceed
without
monitoring.
(See attached file: Sawdust Study.xls)
2 of 2 7/6/2004 9:16 AM

Marshall Steam Station
Condenser Tube Leaks
Sawdust Study
Date
quantity of
sawdust added
samples
collected
TSS (pre)
TSS (post)
BOD (pre)
BOD (post)
7/19/2000
yes
< 4.0 mg/I
< 2.0 mg/I
7/20/2000
200 lbs.
yes
5.0 mg/I
< 2.0 mg/l
7/20/2000
25 lbs.
no
7/31/2000
yes
< 2.0 mg/I
8/3/2000
50 lbs.
yes
< 4.0 mg/I
< 4.0 mg/l
3.3 mg/I
2.1 mg/I
8/4/2000
50 lbs.
no
8/7/2000
150 lbs.
yes
< 4.0 mg/I
4.0 mg/I
< 2.0 mg/I
< 2.0 mg/I
8/8/2000
150 lbs.
yes
< 4.0 mg/I
< 4.0 mg/I
< 2.0 mg/l
< 2.0 mg/I
8/10/2000
300 lbs,
yes
< 4.0 mg/I
< 4.0 mg/I
6.8 mg/I
9.6 mg/I
9/18/2000
300 lbs.
yes
4.0 mg/I
4.0 mg/I
< 2.2 mg/I
< 2.2 mg/I
9/21/2000
300 lbs.
yes
4.0 mg/I
4.0 mg/I
< 2.2 mg/I
< 2.2 mg/I
9/27/2000
300 lbs.
yes
6.0 mg/I
6.0 mg/I
< 2.0 mg/I
4.1 mg/I
9/28/20001
300 lbs.
yes
9.0 mg/I
4.0 mg/I
8.3 mg/I
< 2.3 mg/l
9/30/2000
300 lbs.
yes
< 4.0 mg/I
4.0 mg/I
< 2.7 mg/I
< 2.7 mg/I
4/16/2001
yes
< 4.0 mg/I
< 4.0 mg/I
2.4 mg/I
< 2.4 mg/l
4/19/2001
yes
< 4.0 mg/l
4.0 mg/l
< 2.6 mg/I
< 2.6 mg/l
6/14/2001
yes
4.0 mg/I
4.0 mg/l
5.5 mg/I
4.4 mg/l
8/3/2001
yes
< 4.0 mg/I
4.0 mg/l
< 2.0 mg/I
< 2.0 mg/l
8/13/2001
yes
< 4.0 mg/l
< 4.0 mg/l
4.9 mg/l
< 2.0 mg/I
8/16/2001
yes
< 4.0 mg/I
4.0 mg/I
< 2.0 mg/l
< 2.0 mg/I
8/21/2001
yes
5.0 mg/l
4.0 mg/I
12 mg/I
11 mg/I
8/27/2001
yes
4.0 mg/I
4.0 mg/I
12.0 mg/I
< 2.3 mg/l
9/2/2001
yes
7.0 mg/I
4.0 mg/I
< 2.1 mg/I
< 2.1 mg/I
9/6/2001
yes
4.0 mg/I
6.0 mg/I
3.4 mg/I
3.5 mg/I
9/16/2001
yes
4.0 mg/I
4.0 mg/l
7.2 mg/I
4.5 mg/l

WASTE WATER FROM X-RAY OPERATION AT MARSHALL STEAM STATION
Subject: WASTE WATER FROM X-RAY OPERATION AT MARSHALL STEAM STATION
Date: Wed, 27 Mar 2002 16:34:22 -0500
From: "Robert R Wylie" <[e-mail]>
To: Natalie Sierra <[e-mail]>
CC: 'Donna L Burrell" <[e-mail]> 6J
Natalie,
At Marshall Steam Station a similar x-ray process has been conducted like
the one at Cliffside. That is, welds associated with boiler tube
replacement have been x-rayed, and the associated wastewater has been
collected and analyzed. Marshall only has approximately 150 gallons of
wastewater that needs to be disposed. Your approval of this wastewater is
requested.
The process for disposal would be to put the wastewater into a sump that
discharges to the ash basin (NPDES outfall 002). At Marshall the ash basin
discharges on the average at a flowrate of 6.7 mgd. Since I am going to be
out of my office next week, feel free to contact Donna Burrell (Marshall
Steam Station's Environmental Professional). You may reach Donna Burrell
at 828-478-7820 or e-mail [e-mail].
Thanks for your evaluation of this request.
Robert
-----------------+----------+-----------+------------+------------
Parameter I Drum 1 I Drum 2 I Drum 3 I Drum 4
I------------------------------------------------------------------
Silver (mg/1) 10.45 10.58 10.085 10.16
I------------------------------------------------------------------
Barium (mg/1) I <0.005 I <0.0005 10.094 10.013
----------------------------{--------------------------------------
Cadmium (mg/1) 10.048 10.03 I <0.03 I <0.03
----------------------------------------------------------------
I Chromium (mg/1)I <0.04 I <0.04 I <0.04 I <0.04
I------------------------------------------------------------------
Lead (mg/1) I <0.09 I <0.09 10.18 10.4
I------------------------------------------------------------------
Arsenic (mg/1) I <0.1 I <0.1. I <0.1 I <0.1
-----------------------------}------------------------+------------
I Selenium (mg/1)I 0.008 10.017 10.018 10.044
-----------------+----------+------------------------+------------
Mercury (ug/g) I <0.01 I <0.01 I <0.01 I <0.01
-----------------+----------+-----------+------------+------------
% Ash 12.1 11.0 13.3 16.9
-----------------+-----------------------------------+------------
B.T.U. 10 10 10 10
----------------------------+-----------+------------+------------
Total Sulfur % 14.2 11.1 10.04 10.01
weight I I I
----------------------------i-------------------------+------------
Total Chlorine %I 0.15 10.063 10.07 10.11
weight I I I I
I-----------------+----------+-----------+------------+------------
Ignitibility >201 >201 >201 >201
(degrees F)
-----------------+----------+-----------+------------+------------
pH (SU) 14.5 14.6 19.6 111.4
-----------------+----------+-----------+------------+------------
% Water 172 180 166 176
-----------------+----------+-----------+------------+------------
1 of 2 4/2/02 4:31 PM

WASTE WATER FROM X-RAY OPERATION AT MARSHALL STEAM STATION
Subject: WASTE WATER FROM X-RAY OPERATION AT MARSHALL STEAM STATION
Date: Wed, 27 Mar 2002 16:43:13 -0500
From: 'Robert R Wylie" <[e-mail]>
To: Natalie Sierra <Natalie. Sierra@ ncmail.net>
CC: 'Donna L Burrell" <dlburrel @ duke-energy.com>
Natalie,
I had a mistake on the previous submittal for drum 2 for Barium. I have
corrected it in the following note.
Thanks,
Robert
----- Forwarded by Robert R Wylie/Gen/DukePower on 03/27/02 04:42 PM -----
Robert R
Wylie
03/27/02
Burrell/Gen/DukePower@DukePower
04:34 PM
OPERATION AT
Natalie,
To: Natalie Sierra
<[e-mail]>
CC: Donna L
bcc:
Subject: WASTE WATER FROM X-RAY
MARSHALL STEAM STATION
At Marshall Steam Station a similar x-ray process has been conducted like
the one at Cliffside. That is, welds associated with boiler tube
replacement have been x-rayed, and the associated wastewater has been
collected and analyzed. Marshall only has approximately 150 gallons of
wastewater that needs to be disposed. Your approval of this wastewater is
requested.
The process for disposal would be to put the wastewater into a sump that
discharges to the ash basin (NPDES outfall 002). At Marshall the ash basin
discharges on the average at a flowrate of 6.7 mgd. Since I am going to be
out of my office next week, feel free to contact Donna Burrell (Marshall
Steam Station's Environmental Professional). You may reach Donna Burrell
at 828-478-7820 or e-mail [e-mail].
Thanks for your evaluation of this request.
Robert
-----------------+----------+-----------+------------+------------
Parameter I Drum 1 I Drum 2 I Drum 3 I Drum 4
-----------------+----------+-----------+------------+------------
Silver (mg/1) 10.45 10.58 10.085 10.16
I-----------------+----------+-----------+------------+------------
Barium (mg/1) I <0.005 I <0.005 10.094 10.013
I-----------------+----------+-----------+------------+------------
Cadmium (mg/1) 10.048 10.03 I <0.03 I <0.03
-----------------+----------+-----------+------------+------------
I Chromium (mg/1)I <0.04 I <0.04 I <0.04 I <0.04
I-----------------+----------+-----------+-------------------------
Lead (mg/1) I <0.09 I <0.09 10.18 10.4
----------------
1 of 2 4/2/02 4:31 PM

WASTE WATER FROM X-RAY OPERATION AT MARSHALL STEAM STATION
Arsenic (mg/1) I <0.1 I <0.1 I <0.1 I <0.1
-----------------+----------+-----------+------------+------------
Selenium (mg/1)I 0.008 10.017 10.018 10.044
-----------------+----------+-----------+------------+------------
Mercury (ug/g) I <0.01 I <0.01 I <0.01 I <0.01
-----------------+----------+-----------+------------+------------
% Ash 12.1 11.0 13.3 16.9
-----------------+----------+-----------+------------+------------
B.T.U. 10 10 10 10
-----------------+----------+-----------+------------+------------
Total Sulfur % 14.2 11.1 10.04 10.01
weight
-----------------+----------+-----------+------------+------------
Total Chlorine %I 0.15. 10.063 10.07 10.11
weight I
-----------------+----------+-----------+------------+------------
Ignitibility I >201 >201 >201 >201
(degrees F)
-----------------+----------+-----------+------------+------------
pH (SU) 14.5 14.6 19.6 111.4
-----------------+----------+-----------+------------+------------
% Water 172 180 166. 176
-----------------+----------+-----------+------------+------------
2 of 2 4/2/02 4:31 PM

Sawdust test at Marshall
•L � �
Subject: Sawdust test at Marshall /V 60c90
Date: Fri, 4 Aug 2000 14:58:52 -0400
From: "Robert W Caccia" <[e-mail]>
To: [e-mail]
CC: "Michael A Ruhe" <[e-mail]>,
"Mark E Hollis" <[e-mail]>, [e-mail],
"Donna L Burrell" <[e-mail]>,
"Ronald E Lewis" <relewis1 @duke-energy.com>,
"Troy L Whisenant" <[e-mail]>
Ms. Nowell, thank you for discussing the issue of the sawdust test at Marshall
to temporarily seal the condenser leaks at our Marshall Steam Station. This a
temporary fix until permanent repairs can be made to the system during a
scheduled maintenance outage.
As we told you over the phone we discussed this same issue with Mr. Mike Parker
earlier in the afternoon and he did not have a problem with repeating the test,
but asked us to get your approval to proceed.
We agreed that we could proceed to conduct an additional test by adding 200
pounds of sawdust to the system as long as we repeat the sampling that was
conducted previously. The sampling will consist of: visual observation in the
discharge canal, pre and post sampling for BOD and TSS, and sodium analyses from
the hot well of the condenser system in the station.
The results from the last test as well as the results from this test will be
forwarded to you once they are available from the laboratory.
Thank you for taking the time to help us with this issue.
1 of 1 8/4/00 4:05 PM

Marshall Steam Station
8/31/2000
Procedure for adding sawdust to control condenser leaks in the
Condenser Cooling Water (CCW) system
1. Sawdust is only useful for temporary control of very small condenser
tube leaks.
2. Check the sodium concentration in the Hotwell pump discharge
(condensate) to confirm small condenser tube leaks (3 to 10 ppb).
3. When the sodium concentration in the condensate is >3 ppb, open
the blowdown to keep the sodium concentration of the main steam <3
ppb.
4. When the sodium concentration in the main steam is >3 ppb, plan to
add sawdust to the CCW system.
5. Coordinate with Station Operators to maintain a constant CCW
flow.
6. Transport three 55 gallon drums of sawdust to the CCW intake.
7. Locate a drum of sawdust at the intake of the CCW system on the
grating over the pump bay behind the trash screens.
8. Slowly add water to the drum of sawdust allowing the sawdust to
overflow into the pump bay (take approximately 15 minutes per
drum).
9. Check for decreasing sodium concentrations in the condensate.
10. When the main steam and condensate sodium concentrations are
within the normal operating range, set the blowdown to the normal
operating range.

Marshall Steam Station
Condenser Tube Leaks
Sawdust Study
Date
quantity of
sawdust added
samples
collected
TSS (pre)
TSS (post)
BOD (pre)
BOD (post)
7/19/00
yes
< 4.0 mg/I
< 2.0 mg/I
7/20/00
200 lbs.
yes
5.0 mg/I
< 2.0 mg/l
7/20/00
25Ibs.
no
7/31/00
yes
< 2.0 mg/I
8/3/00
50 lbs.
yes
< 4.0 mg/I
< 4.0 mg/l
3.3 mg/l
2.1 mg/I
8/4/00
50 lbs.
no
8/7/00
200 lbs.
yes
< 4.0 mg/I
4.0 mg/I
< 2.0 mg/I
< 2.0 mg/I
8/8/00
150 lbs.
yes
< 4.0 mg/I
< 4.0 mg/l
< 2.0 mg/I
< 2.0 mg/I
8/10/00
300 Ibs.
yes
< 4.0 mg/I
< 4.0 mg/l
6.8 mg/I
9.6 me

Possible Use of Sawdust to Plug Condenser Tube Leaks
.& 4 „
fir^
• Subject: Possible Use of Sawdust to Plug Condenser Tube Leaks
Date: Tue, 18 Jul 2000 08:36:33 -0400
From: "Ronald E Lewis" <relewis 1 @ duke-energy.com>
To: [e-mail]
CC: Michael—[e-mail]
Jackie and Mike, this note is to follow-up on the phone conversations and
messages yesterday concerning the above. The condenser tubes of Marshall Unit'2
apparently have small pin-hole leaks that cannot be isolated. The condenser
tubes are scheduled to be replaced in 2001, but until that time the station is
looking for some temporary fixes. One of the options identified was the use of
fine sawdust. According to the station folks this has been used with some
success at other utilities. The station would be able to add the fine sawdust
of untreated wood to just the Unit 2 condenser intake bay. The -estimated
quantity would be less than 200 pounds. Also inspection of the condenser
cooling water discharge canal would be planned during the test to look for
accumulation behind the oil boom in the canal, as well as other areas of the
discharge cove.
If you see no problem with this test, we would inform you of the test date and
provide a follow-up report for further permit evaluation. I'll be out the
office the rest of the day, but will be checking phonemail [phone].
C ,
1 of 1 7/18/00 11:40 AM

Re: Possitie Use of Sawdust to Plug Condenser Tube Leaks A/G 000 �4C 7
Subject: Re: Possible Use of Sawdust to Plug Condenser Tube Leaks
Date: Wed, 19 Jul 2000 12:21:17 -0400
From: Jackie Nowell <[e-mail]>
Organization: NC DENR DWQ
To: Ronald E Lewis <relewis1 @duke-energy.com>
CC: [e-mail], [e-mail],
Dave Goodrich <Dave. Goodrich@ ncmail.net>
Mr. Lewis, per our phone conversation earlier today, DWQ foresees no problems with
the addition of sawdust to the condenser tubes. We request that Duke Power to
provide some comparative analytical data from the discharge canal, before and after
the test. The data should include monitoring for BOD5 and TSS as well as visual
observations of the discharge canal and cove. Please forward results to the NPDES
Unit in Raleigh and the Mooresville Regional Office.
Ronald E Lewis wrote:
> Jackie and Mike, this note is to follow-up on the phone conversations and
> messages yesterday concerning the above. The condenser tubes of Marshall Unit 2
> apparently have small pin-hole leaks that cannot be isolated. The condenser
> tubes are scheduled to be replaced in 2001, but until that time the station is
> looking for some temporary fixes. One of the options identified was the use of
> fine sawdust. According to the station folks this has been used with some
> success at other utilities. The station would be able to add the fine sawdust
> of untreated wood to just the Unit 2 condenser intake bay. The estimated
> quantity would be less than 200 pounds. Also inspection of the condenser
> cooling water discharge canal would be planned during the test to look for
> accumulation behind the oil boom in the canal, as well as other areas of the
> discharge cove.
> If you see no problem with this test, we would inform you of the test date and
> provide a follow-up report for further permit evaluation. I'll be out the
> office the rest of the day, but will be checking phonemail [phone].
1 of 1 7/19/00 2:38 PM

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