NC0004961_Regional Office Historical File Pre 2018 (5)

State of North Carolina
Department of Environment, Health, and Natural Resources
Mooresville Regional Office
James G. Martin, Governor Albert F. Hilton, Regional Manager
William W. Cobey, Jr., Secretary DIVISION OF ENVIRONMENTAL MANAGEMENT
December 6, 1989
Mr. William O. Parker, Jr.
Post Office Box 367
Mount Holly, North Carolina 28012
Subject: NPDES Permit No. NC 0004961
Duke Power Company-Riverbend
Gaston County, NC
Dear Mr. Parker:
Our records indicate that NPDES Permit No. NC 0004961 was
issued on November 30, 1989 for the discharge of wastewater to
the surface waters of the State from your facility. The purpose
of this letter is to advise you of the importance of the Permit
and the liabilities in the event of failure to comply with the
terms and conditions of the Permit. If you have not already done
so, it is suggested that you thoroughly read the Permit. Of
particular importance is Page M3.
Page M3 sets forth the effluent limitations and monitoring
requirements for your discharge(s). Your discharge(s) must not
exceed any of the limitations set forth. The section headed
"Monitoring Requirements" describes the measurement frequencies,
sample types and sampling locations. Upon commencement of your
discharge (or operation), you must initiate the required
monitoring. The monitoring results must be entered on the
reporting forms furnished to you by this Agency. If you have not
received these forms, they should be arriving shortly. If you
fail to receive the form, please contact this Office as quickly
as possible. I have enclosed a sample of the "Effluent"
reporting form (DEM Form MR-1), plus instructions for completing
the form. It is imperative that all applicable parts be
completed, and the original and one copy be submitted as
required.
The remaining Parts of the Permit (Parts II and III) set
forth definitions, general conditions and special conditions
applicable to the operation of wastewater treatment facilities
and/or discharge(s). The conditions include special reporting
requirements in the event of noncompliance, bypasses, treatment
919 North Main Street, Mooresville, N.C. 28115 • Telephone [phone] • FAX [phone]
An Equal Opportunity Affirmative Action Employer

Ippmr7.William.
Page Two
December 6,
O. Parker, Jr.
unit/process failures, etc. Also addressed are requirements for
a certified wastewater treatment plant operator if you are
operating wastewater treatment facilities. Any changes in
operation of wastewater treatment facilities, quantity and type
of wastewater being treated or discharged, expansions and/or
upgrading of wastewater treatment facilities must be permitted or
approved by this Agency.
Failure to comply with the terms and conditions of an NPDES
Permit subjects the Permittee to enforcement action pursuant to
Section 143-215.6 of the North Carolina General Statutes. A
civil penalty of up to $10,000 per violation plus criminal
penalties may be assessed for such violations. If you find at
any time that you are unable to comply with the terms and
conditions of the Permit, you should contact this Office
immediately. A Consent Order may be necessary while pursuing
action to obtain compliance.
As a final note, an NPDES Permit is normally issued for a
five-year period. Permits are not automatically renewed.
Renewal requests must be submitted to this Agency no later than
180 days prior to expiration. Please make note of the expiration
date of your Permit. This date is set forth on Page M-1 or I-1
of the Permit. Also note that NPDES Permits are not
transferable. If you, as the Permittee, cease to need this
Permit, then you should request that the Permit be rescinded.
As mentioned previously, the purpose of this letter is to
advise you of the importance of your NPDES Permit. Please read
the Permit and contact this Office at 704/663-1699 in Mooresville
if you have any questions or need clarification. We look forward
to providing any assistance.
Sincerely,
%D. '7- -�
D. Rex Gleason, P. E.
Water Quality Regional Supervisor
Enclosure
DRG:se

OF 77
Permit No. NC(
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Catawba River
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This permit S,
This permit
idnight on
September 30,
Signed this day
September
14, 1989
R. Paul Wilms, Dil7ector.
Division of Environmental. Management
By Authority of the Environmental Ma

Permit No. NC0004961
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1- Continue to discharge once -through cooling water (outfall 001), an ash
basin discharge (outfall 002) consisting of coal pile runoff-, domestic
wastewater, stormwater runoff, metal cleaning wastes, and ash transport
water from a facility located at the Riverbend Steam Station in Mount
Holly, Gaston County (See Part III of this Permit) and,
2. Discharge from said treatment works at the location specified on the
attached map into the Catawba River (Mountain Island Lake) which is
classified Class "WS-III" and "B" waters in the Catawba River Basin.

4ITED STATES
,NIT OF THE INTERIOR
.OGICAL SURVEY
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A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
NPDES No. NC0004961
During the period beginning on the effective date of the
permit and lasting
until
expiration, the
Permittee is authorized to discharge from outfall(s) serial
number(s) 001 (once
through
cooling water).
Such discharges shall be limited and monitored by the Permittee
as specified below:
Effluent Characteristics Discharge Limitations Monitoring Requirements
Lbs da Other Units (Specify)
Measurement
Sample
*Sample
Monthly�Avg. Daily Max. Monthly Avg. Daily Max._ Frequency
Type
Location
Flow
Daily Pump log or
E
0 o
Temperature C( F) 35(95)
similar
Daily
reading
Grab E
Temperature *`
Daily
Grab
U,D
* Sample Location: E - Effluent, U - Upstream (intake), D - Downstream at Mountain Island Lake Dam.
The temperature of the effluent shall be such as not to cause an increase in the temperature between the
upstream and downstream sites of the receiving stream of more than 2.8° C (5° F) and in no case cause the ambient
water temperature to exceed 320C (89.60F).
Chlorination of the once through cooling water shall not be allowed at this facility. Should Duke Power wish to
chlorinate its once through cooling water, a permit modification must be requested and received prior to
commencing chlorination.
The Regional Administrator has determined pursuant to Section 316 (a) of the Act that the thermal component of the
discharge assures the protection and propagation of a balanced, indigenous population of shellfish, fish, and wildlife in
and on the receiving body of water.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final NPDES No. NC0004961
During the period beginning on the effective date of the permit and lasting until expiration the
Permittee is authorized to discharge from outfall(s) serial number(s) 002 Ash Settling pond discharge.
Such discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics
Lbs da
Monthly Avg. Daily Max.
Flow
Total Suspended Solids ***
Oil and Grease
Total Copper
Total Iron
Total Arsenic
Total Selenium
Total Nitrogen (NO2
Total Phosphorus
Chronic Tonicity**
Pollutant Analysis
+ NO3 + TKN)
Discharge Limitations
Other Units (Specify)
Monthly Avg. Daily Max.
23.0 mg/1
11.0 mg/l
1.0 mg/1
1.0 mg/1
75.0 mg/1
15. 0 mg/1
1.0 mg/1
1.0 mg/1
480.0 ug/ 1
Monitoring Requirements
Measurement
Sample
*Sample
Frequency
Tie
Location
Weekly
Pump logs or
E
Similar readings
2/month***** Grab
E
2/month'"***
Grab
E
2/month
Grab
E
2/month
Grab
E
2/month
Grab
E
Monthly
Grab
E
Monthly
Grab
E
Monthly
Grab
E
Quarterly
Grab
E
Annually
E
Sample location: E - Effluent
Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with any other
waste stream.
** Chronic Toxicity (Ceriodaphnia) P/F at 10%; April, July, October, and January; See Part III, condition Q.
The metal cleaning waste, coal pile runoff, ash transport water, domestic wastewater, and low volume waste shall
be discharged into the ash settling pond.
*** Monthly average of 43 mg/l is permitted provided that the permittee can satisfactorily demonstrate that the
difference between 23 mg/l and 43 mg/l is due to the concentration of total suspended solids in the source body.
**** See Part III, Condition R.
**** One additional grab sample shall be collected and analyzed for oil and grease, and total suspended solids during
the period of maximum expected flow for each rainfall event exceeding 1.25 inches per day (25% of the 10y24h
event). The corresponding flow shall be reported. The permittee shall report the presence of cenospheres
observed in the samples. After monitoring for a period of one year, the permittee may request reduction or
elimination of this monitoring.

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (CONTINUED)
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored
2/month at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Part III
Permit No. N00004961
F. Toxicity Reopener
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 may be expected in the receiving stream as a result of this discharge.
G. In the event that waste streams from various sources are combined for treatment
or discharge, the quantity of each pollutant or pollutant property attributable
to each controlled waste source shall not exceed the specified limitation for
that waste source.
H. There shall be no discharge of polychlorinated bypheny.l compounds such as those
commonly used for transformer fluid.
I. 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 Environmental
Management. Such notification shall include completion of Biocide Worksheet
Form 101 and a map .locating the discharge point and receiving stream.
J. Continued intake screen backwash, transformer cooling water, and conbustion
turbine cooling water discharges are permitted without limitations or
monitoring requirements.
K. Nothing contained in this permit shall be constructed as a waiver by permittee
or any right to a hearing it may have pursuant to State or Federal laws or
regulations.
L. The term "low volume waste sources" means, taken collectively as if from one
source, wastewater from all sources except those for which specific limitations
are otherwise established in this part. Low volume 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,
cooling tower basin cleaning wastes, and recirculating house service water
systems. Sanitary and air conditioning wastes are not included.
M. The term "metal cleaning waste" means any wastewater resulting from cleaning
(with or without chemical cleaning compounds) any metal process equipment
including, but not limited to, boiler tube cleaning, boiler fireside cleaning,
and air preheater cleaning. Metals cleaning will be conducted according to
Duke Power's approved equivalency demonstration.

N. The term "chemical metals 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.
0. It has been determined from information submitted that the plans and procedures
in place at Ri.verbend Steam Station are equivalent to that of a BMP.
P. 'Upset" means an exceptional. incident in which there is unintentional and
temporary non-compliance with technology based permit effluent limitations
because of factors beyond the reasonable control of the permittee. An upset
does not include noncompliance to the extend caused by operational error,
improperly designed treatment facilities, inadequate treatment facilities, lack
of preventive maintenance, or careless or improper operations.
Q. Chronic Toxicity Testing Requirement
The effluent discharge shall at no time exhibit chronic toxicity in any two
consecutive toxicity tests, using test procedures outlined in:
1). The North Carolina Ceriodaphnia chronic effluent bioassay procedure
(North Carolina Chronic Bioassay Procedure - Revised *February 1987) or
subsequent version.
The effluent concentration at which there may be no observable inhibition of
reproduction or significant mortality is 10% (defined as treatment two in the
North Carolina procedure document). The permit holder shall perform quarterly
monitoring using this procedure to establish compliance with the permit
condition. The first test will be performed after thirty days from issuance of
this permit during the months of July, October, January, April. Effluent
sampling for this testing shall be performed at the NPDES permitted final
effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be
entered on the Effluent Discharge Monitoring Form (MR-1) for the month in which
it was performed, using the parameter code TGP3B. Additionally, DEM from AT-1
(original) is to be sent to the following address:
Attention: Technical Services Branch
North Carolina Division of
Environmental Management
P.O. Box 27687
Raleigh, N.C. 27611
Test data shall be complete and accurate and include all supporting
chemical/physical measurements performed in association with the toxicity
tests, as well as all dose/response data. Total residual chlorine of the
effluent toxicity sample must be measured and reported if chlorine is employed
for disinfection of the waste stream.

Should any single quarterly monitoring indicate a failure to meet specified
limits, then monthly monitoring will begin immediately until such time that a
single test is passed. Upon passing, this monthly test requirement will revert
to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the
North Carolina Division of Environmental Management indicate potential impacts
to the receiving stream, this permit may be reopened and modified to include
alternate monitoring requirements or limits.
"Failure to achieve test conditions as specified in the cited document, such as
minimum control organism survival and appropriate environmental controls, shall
constitute an invalid test and will require immediate retesting (within 30 days
of initial monitoring event). Failure to submit suitable test results will
constitute non-compliance with monitoring requirements, but will not subject
the permittee to civil penalty if the permittee has demonstrated a diligent
attempt to conduct a suitable retest and has engaged the services of a
laboratory with valid certification under North Carolina's laboratory
certification program.
R. The permittee shall conduct a test for priority pollutants annually at the
effluent from the treatment plant. The discharge shall be evaluated as follows:
1) A pollutant analysis of the effluent must be completed annually using
EPA approved methods for the following analytic fractions: (a)
purgeables (i.e., volatile organic compounds); (b) acid extractables;
(c) base/neutral extractables; (d) organochlorine pesticides and PCB's
(e) herbicides; and (f) metals and other inorganics. The Annual
Pollutant Analysis (APA) Monitoring Requirement Reporting Form A, to
be provided to all discharges affected by this monitoring requirement,
describes the sampling and analysis requirements and lists chemicals
to be included in the pollutant analysis. This monitoring requirement
is to be referred to as the "Annual Pollutant Analysis" (APA).
2) Other significant levels of synthetic organic chemicals must be
identified and approximately quantified. For the purpose of
implementing this requirement, the largest 10 GC/MS peaks in each
organic chemical analytic fraction (or fewer than 10, if less than 10
unidentified peaks) occur for chemicals other than those specified on
the APA Monitoring Requirement Reporting Form A should be identified
and approximately quantified as stated in the APA Reporting Form A
instructions. This part (item 2) of the APA monitoring requirement is
to be referred to as the "10 significant peaks rule".
S. 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.

T. Tf the permittee, after monitoring for at least six months, determines that he
is consistently meeting the effluent limits contained herein, the permittee may
request of the Director that the monitoring requirements be. reduced to a .lesser
frequency.
U. Beginning on the effective date of this permit and lasting until expiration,
there shall be no discharge of plant wastes to the ash pond unless the
permittee provides and maintains at all. times a minimum free water volume
(between the top of the sediment level and the minimum discharge elevation)
equivalent to the sum of the maximum 24-hour_ plant discharges plus all direct
rainfall and all runoff flows to the pond resulting from a 10-year, 24-hour
rainfall event, when using a runoff coefficient of 1..0. During the term of the
permit, the permittee shall remove settled material from the ponds or otherwise
enlarge the available storage capacities in order to maintain the equired
minimum volumes at all times. No later than December 31, 1989, and annually
thereafter, 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. Present
information indicates a needed volume of 192 A-ft in addition to solids which
will be deposited in the ash pond. Any changes to plant operations affecting
such certification shall be reported to the Director within five days.
Note: In the event that adequate volume has been certified to exist for the
term of the permit, periodic certification is not needed.
V. 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 wastes 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 in the ratio of
100 to 1.
2. Well-defined shallow ash delta near the ash basin influent.

3. Ash pond pH of no less than 6.5 pr.i.or to metal cleaning waste addition.
4. Four days retention time in ash pond with e.fftuent flow 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, NaBr0; ammonium carbonate,
(NH)CO; and ammonium hydroxide, N1I011.
b. Iron removal step - hydrochloric acid, ]IC1; and ammonium
bifluoride, (NH)BF and proprietory 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, permittee will re -clone 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.
W. Discharge of any waste resulting from the combustion of toxic or. hazardous
waste to any waste stream which utimately discharges to waters of the United
States is prohibited, unless specifically authorized in this permit.
X. The permittee shall report all visible discharges of floating materials, such
as, an oil sheen to the Director when submitting DMR's.
Y. The permittee shall check the diked areas for leaks by a visible inspection and
shall report any seepage detected.

II
Duke Power Company (7 04) 373-46/ 1
Fossil Production Department y
P. 0. Box 33189 �4Y
422 South Church Street
Charlotte, N.C. 28242 1
RECEIVED:
10 DUKE POWER pIVISION Of E 1v RONMENTAL MAILASEIIE
April 17, 1989 APR 19 1989
MOMESVILLE
`EW NAL OEE16�
Mr. D. Rex Gleason, P.E.
Water Quality Regional Supervisor
N. C. Division of Environmental Management
P. 0. Box 950
Mooresville, North Carolina 28115-0950
Subject: Riverbend Steam Station
Compliance Evaluation Inspection
File: RB-704.01
Dear Mr. Gleason:
In reference to your March 16, 1989 letter on the above subject, our investi-
gation and response to the summary of findings included with Mr. Allen Hardy's
Compliance Evaluation Inspection report is submitted for your review.
Two discharges into the intake canal, the transformer cooling water (Auxiliary
Stepdown Transformers) and the combustion turbine cooling water (Breathing Air
Compressors), were identified as not having outfall numbers. Both components
use small quantities of service water during operation for non -contact cooling
and/or sealing purposes. The auxiliary stepdown transformers (3) have a
continuous flow of cooling water, approximately 5 gpm each, to protect the
cooling coils. The Breathing Air Compressors are normally in a standby mode
and are used on an as needed basis. Discharge of service water from both
components including yard runoff is to the intake canal via the oil trap
tanks.
Data from samples taken March 28 indicates that the flows from the subject
components have no negative impact on the discharge flows from the oil trap
tanks. From the data, included as an attachment, it is noted that oil trap
tank #1 data is slightly higher than the other samples. This can be
attributed to runoff from the grassed areas around the Fuel Oil Storage Tank
and the Combustion Turbines. At the time of sampling there was no flow from
the Breathing Air Compressors to oil trap tank #1; however, cooling water from
the Auxiliary Stepdown Transformers was flowing to oil trap tank U .
Effluents from the subject components may have a slightly elevated temperature
when leaving the component, but this will not be detectable after passing
through the oil trap tanks.
Based on the above information and substantiating data, Duke's position is
that these are miscellaneous non -contact cooling/sealing water effluents
having a very minimal impact, if any, on the receiving environment and should
not be classified as NPDES discharge monitoring points as part of the
Riverbend permit renewal review process.

Location
2300 KV
Transformer
(@ outlet)
#1 Oil
Trap Tank
#3 Oil
Trap Tank
Attachment
Riverbend Steam Station/Oil Trap Tank Analysis
3/28/89
Tgmp.
Oil & Grease pH
Cond.
TSS
Cu
Fe
As
Se
( F)
(mg/1)
(MMhos)
(mg/1)
(mg/1)
(mg/1)
(ug/1)
(ug/1)
610
c 0.10 7.43
65.0
3.5
c 0.1
0.35
c 1.0
c 2.0
610
c 0.10
7.80
147.0
630
c 0.10
7.60
65.0
6.3 '<0.1 1.7 c1.0 c2.0
3.5 `-0.1 0.35 c1.0 c2.0

EFFLUENT
NPDES PERMIT NO: 60-OOD�Lq6l DISCHARGE NO: 60 1 MONTH: AU YEAR:IMF
FACILITY NAME: Rifflerhtvid cS+Cam cS+a+;6n I CLASS:-T COUNTY: _ Ggn+c r-)
OPERATOR IN RESPONSIBLE CHARGE (ORC) :_ W . M. CA V't n --V GRADE:_
CERTIFIED LABORATORY:
CHECK BLOCK IF ORC HAS CHANGED PERSON (S) COLLECTING SAMPLES:
Mail original and one copy to: I CERTIFY THAT THIS REPORT
ATT: Central Files IS ACCURATE AND COMPLETE TO
Division of Environmental Management
N C Department of NRCD THE BEST OF MY NNOWLEDDf.
PO Box 27587 , ^ /a r
Raleigh. North Carolina 27611 X l�lJ � . L(1�, (-LW
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PV
Date: March 15, 1989
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Gaston
NPDES Permit No. NC 0004961
PART I - GENERAL INFORMATION
1. Facility and Address: Riverbend Steam Station
Duke Power Company
Post Office Box 367
Mount Holly, North Carolina 28120
2. Date of Investigation: March 9, 1989
3. Report Prepared By: Allen Hardy, Environmental Engineer I
4. Person Contacted: Richard Crowell, 704/373-7642; Monty
Neill, 704/827-4931
5. Directions to Site: The Riverbend Steam Station is located
on the west bank of the Catawba River (Mountain Island
Lake) just north of the Highway 16 crossing.
6. Discharge Point: Exit. 001 Exiot. 002 Exi.5t. 003
Latitude: 35-21128" 335 22'06" 35""21137"
Longitude: 80058112" 80057131" 80058130"
Attach a USGS Map Extract and indicate treatment plant site
and discharge point on map.
USGS Quad No.: F 15 SW
7. Size (land available for expansion and upgrading): Duke
Power Company owns numerous acres of land on this site.
There is adequate land available for expansion and
upgrading.
8. Topography (relationship to flood plain included): The
topography consists of gently rolling slopes from 3-100.
9. Location of Nearest Dwelling: None within 1000 feet of the
existing facilities.
10. Receiving Stream or Affected Surface Waters: Mountain
Island Lake (Catawba River)
a. Classification: WS-III and B
b. River Basin and Subbasin No.: Catawba 03-08-33

PF
Page Two
C. Describe receiving stream features and pertinent
downstream uses: The receiving stream is the Catawba
River which contains an excellent flow at all times.
The river contains numerous discharges and, supplies
several cities with water. The receiving stream
experiences frequent human contact through typical
lake recreational activities.
PART III - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Type of Wastewater: <1% Domestic
99% Industrial
a. Volume of Wastewater: *88.96 MGD
b. Types and quantities of industrial wastewater: *The
wastewater produced at the Riverbend Steam Station
consists of several discharges. Discharge 001:
Consists of the once through condenser cooling water.
Discharge 002: Consists of wastewater from the sewage
system, storm water runoff, and the wastewater
produced from the storage, transfer and burning of
coal. Two (2) unpermitted discharges are produced
from the transformer and combustion turbine cooling
waters, storm water runoff, and miscellaneous
equipment cooling and seals.
C. Prevalent toxic constituents in wastewater: Contained
in the supplemental information provided with the
application.
d. Pretreatment Program (POTWs only): N/A
2. Production Rates (industrial discharges only) in Pounds:
N/A
3. Description of Industrial Process (for industries only) and
Applicable CFR Part and Subpart: N/A
4. Type of Treatment (specify whether proposed or existing):
Discharge 001: Contains effluent from the condensers which
receive no formal treatment. Discharge 002: The treatment
consists of an ash pond settling basin. A preliminary
treatment of domestic waste in a 10,000 gpd septic tank
also occurs before entering the ash pond.
5. Sludge Handling and Disposal Scheme: N/A
6. Treatment Plant Classification: Class I
7. SIC Code(s): 4911
Wastewater Code(s): 14, 68, 16, 69

Page Three
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grants
Funds (municipals only)? No
2. Special monitoring requests: No
3. Additional effluent limits requests: No
4. Other: No
PART IV - EVALUATION AND RECOMMENDATIONS
The applicant, Duke Power Company, proposes to continue
operating wastewater facilities serving Riverbend Steam Station.
The present facilities are permitted for three discharges
(outfall setial numbers 001, 002 and 003). Outfall 001 is for
once -through cooling water, Outfall 002 is for the ash settling
pond (with domestic wastewater), and Outfall 003 is for the
proposed sludge/landfill settling pond. However, the compliance
monitoring screen shows there being five (5) locations. Those
mentioned above as well as Outfalls 004 - metal cleaning waste
and 005 - boiler blowdown. Presently discharges 004 and 005 are
being routed to the ash basin and discharged through Outfall
002, and the facilities for outfall 003 have not been built.
There are two (2) other discharges located adjacent to the power
plant building that have not been assigned outfall numbers.
These discharges are produced from transformer and combustion
turbine cooling water, storm water runoff, and miscellaneous
equipment cooling and seals. The locations of all the
discharges are on the attached topo map. A letter of response
from Duke Power Company addressing the unpermitted discharges is
attached.
The wastewater facilities serving the station appeared to
be adequate for their intended purposes.
Therefore, for the above reasons, it is recommended that
the NPDES Permit for the subject facility be re -issued with the
following conditions; that Outfalls 001, 002 and 003 and their
discharge description remain the same, and that Outfalls 004 and
005 be added to include the appropriate monitoring (if any) for
the above mentioned unassigned outfall discharges.
[A] - A�La­ /4LLUdm-
Signature of Report Pre rer
Water Quality R94idnal Supervisor

IITED STATES
NT OF THE INTERIOR
,OGICAL SURVEY
4854 ,
501000m.E 502 503 57'30" 504 505 (LAKE NOR
IT
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owerplant ` r rk 4,_
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Permit No. NC0004961
STATE OF NORTH CAROLINA
DEPARTMENT OF NATURAL RESOURCES AND COMMUNITY DEVELOPMENT
N. C. DEPT. OF NATURAL DIVISION OF ENVIRONMENTAL MANAGEMENT
RESOURCES AND p E R M I T.
COMMUNITY DEVELOP.INM-M
JUL 1 41989 TO DISCHARGE WASTEWATER UNDER THE
3 OF EN"?oS''E��TAI �eHasEMBATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
LRI
MARZI L111 REGIMU 8FFZE .
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 Power Company
is hereby authorized to discharge wastewater from a facility located at
Riverbend Steam Station
Mount Holly
Gaston County
to receiving waters designated as the Catawba River (Mountain Island Lake) in the
Catawba River Basin
in. accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, and III hereof.
This permit shall become effective
This permit and the authorization to discharge shall expire at midnight on.
Signed this day 1* FT
OR '�
R. Pau]. Wilms, Director
Division of Environmental Management
By Authority of the Environmental Management Commission.

Permit No. NC0004961
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1. Continue to discharge once -through cooling water (outfall 001), an ash
basin discharge (outfall 002) consisting of coal pile runoff, domestic
wastewater, stormwater runoff, metal cleaning wastes, and ash transport
water from a facility located at the Riverbend Steam Station in Mount
Holly, Gaston County (See Part III of this Permit) and,
2. Discharge from said treatment works at the location specified on the
attached map into the Catawba. River (Mountain Island Lake) which is
classified Class "WS-III" and "B" waters in the Catawba River Basin.

d ITED STATES
NT OF THE INTERIOR
.OGICAL SURVEY
4854
501000", E. 502 $03 57'30" 504 505 (LAKE NORI
IT T
�02
_21
ir
b
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Bridge I S� a _ <.
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A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
NPDES No. NC0004961
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from outfall(s) serial number(s) 001 (once through cooling water).
Such discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics
Lbs da
Monthly Avg. Daily Max.
Flow
Temperature o C" o F)
Temperature
Discharge Limitations
Other Units (Specify)
Monthly Avg. Daily Max.
35(95)
Monitoring Requirements
Measurement Sample *Sample
Frequency Type Location
Daily Pump log or E
similar reading
Daily Grab E
Daily Grab U,D
y Sample Location: E - Effluent, U - Upstream (intake), D - Downstream at Mountain Lake Dam.
*` The temperature of the effluent shall be such as not to cause an increase in the temperature between the
upstream and downstream sites of the receiving stream of more than 2.8 C (5° F) and in no case cause the ambient
water temperature to exceed 320C (89.60F).
Chlorination of the once through cooling water shall not be allowed at this facility. Should Duke Power wish to
chlorinate its once through cooling water, a permit modification must be requested and received prior to
commencing chlorination.
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 populationof shellfish, fish, and wildlife in
and on the receiving body of water.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final NPDES No. NC0004961
During the period beginning on the effective date of the permit and lasting until expiration the
Permittee is authorized to discharge from outfall(s) serial number(s) 002 Ash Settling pond discharge.
Such discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics
Discharge
Limitations
Monitoring Requirements
Lbs/day
Other Units
(Specify)
Measurement
Sample
*Sample
Monthly Avg. Daily
Max. Monthly Avg.
Daily Max.
Frequency
Tie
Location
Flow
Weekly
Pump logs or
E
Similar readings
Total Suspended Solids ***
23.0 mg/1
75.0 mg/l
2/month
Grab
E
Oil and Grease
11.0 mg/1
15.0 mg/l
2/month
Grab
E
Total Copper
1.0 mg/l
1.0 mg/l
2/month
Grab
E
Total Iron
1.0 mg/l
1.0 mg/1
2/month
Grab
E
Total Arsenic
480.0 ug/1
2/month
Grab
E
Total Selenium
Monthly
Grab
E
Total Nitrogen (NO2 + NO + TKN)
Monthly
Grab
E
Total Phosphorus
Monthly
Grab
E
Chronic Toxicity**
Quarterly
Grab
E
Pollutant. Analysis ****
Annually
E
* Sample location: E - Effluent
Effluent sampling shall be conducted
at the discharge from
the ash settling
pond prior
to mixing with
any other
waste stream.
** Chronic Toxicity (Ceriodaphnia) P/F at 10%; April, July, October, and January; See Part III, condition Q.
The metal cleaning waste, coal pile runoff, ash transport water, domestic wastewater, and low volume waste shall
be discharged into the ash settling pond.
*** Monthly average of50 mg/1 is permitted provided that the permittee can satisfactorily demonstrate that the
difference between 30 mg/l and 50 mg/l is due to the concentration of total suspended solids in the source body.
**** See Part III, Condition R.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored
2/month at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

t
Part III
Permit No. NC0004961
,F. Toxicity Reopener
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 may be expected in the receiving stream as a result of this discharge.
G. In the event that waste streams from various sources are combined for treatment
or discharge, the quantity of each pollutant or pollutant property attributable
to each controlled waste source shall not exceed the specified limitation for
that waste source.
H. These shall be no discharge of polychlorinated byphenyl_ compounds such as those
commonly used for transformer fliii.d.
I. 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 Environmental
Management. Such notification shall include completion of Biocide Wo.rksheet
Form 101 and a. map locating the discharge point and receiving stream.
J. Continued intake screen backwash, transformer cooling water, and combustion
turbine cooling water discharges are permitted without limitations or
monitoring requirements.
K. Nothing contained in this permit shall be constructed as a waiver by permittee
or any right to a hearing it may have pursuant to State or Federal laws or
regulations.
L. The term "low volume waste sources" means, taken collectively as if from one
source, wastewater from all sources except those for which specific limitations
are otherwise established in this part. Low volume 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,
cooling tower basin cleaning wastes, and recirculating house service water_
systems. Sanitary and air conditioning wastes are not included.
M. The term "metal cleaning waste" means any wastewater resulting from cleaning
(wi_th or without chemical cleaning compounds) any metal process equipment
including, but not limited to, boiler tube cleaning, boiler fireside cleaning,
and air preheater cleaning. Mei:als cleaning will be conducted according to
Dicke Power's approved equivalency demonstration.

t
N. The term "chemical metals 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.
0. It has been determined from information submitted that the plans and procedures
in place at Marshall Steam Station are equivalent to that of a BMP.
P. "Upset" means an exceptional incident in which there is unintentional and
temporary non-compliance with technology ,based permit effluent limitations
because of factors beyond the reasonable control of the permittee. An upset
does not include noncompliance to the extend caused by operational error,
improperly designed treatment facilities, inadequate treatment facilities, lack
of preventive maintenance, or careless or improper operations.
Q. Chronic Toxicity Testing Requirement
The effluent discharge shall at no time exhibit chronic toxicity in any two
consecutive toxicity tests, using test procedures outlined in:
1). The North Carolina Ceriodaphnia chronic effluent bioassay procedure
(North Carolina Chronic Bioassay Procedure - Revised `February 1987) or
subsequent version.
The effluent concentration at which there may be no observable inhibition of
reproduction or significant mortality is 10% (defined as treatment two in the
North Carolina procedure document). The permit holder shall perform quarterly
monitoring using this procedure to establish compliance with the permit
condition. The first test will be performed after thirty days from issuance of
this permit during the months of July, October, January, April. Effluent
sampling for this testing shall be performed at the NPDES permitted final
effluent discharge below all treatment processes.
All. toxicity testing results required as part of this permit condition will be
entered on the Effluent Discharge Monitoring Form (MR-1) for the month in which
it was performed, using the parameter code TGP313. Additionally, DEM from AT-1
(original) is to be sent to the following address:
Attention: Technical Services Branch
North Carolina Division of
Environmental Management
P.O. Box 27687
Raleigh, N.C. 27611
Test data shall be complete and accurate and include all supporting
chemical/physical measurements performed in association with the toxicity
tests, as well. as all dose/response data. Total residual chlorine of the
effluent toxicity sample must be measured and reported if chlorine is employed
for disinfection of the waste stream.

Should any single quarterly monitoring indicate a failure to meet specified
limits, then monthly monitoring will begin immediately until such time that a
single test is passed. Upon passing, this monthly test requirement will revert
to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the
North Carolina Division of Environmental Management indicate potential impacts
to the receiving stream, this permit may be reopened 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 and appropriate environmental
controls, shall constitute an invalid test°and will require immediate retesting
(within 30 days of initial monitoring event). Failure to submit suitable test
results will constitute noncompliance with monitoring requirements.
R. The permittee shall conduct a test for priority pollutants annually at the
effluent from the treatment plant. The discharge shall be evaluated as follows:
1) A pollutant analysis of the effluent must be completed annually using
EPA approved methods for the following analytic fractions: (a)
purgeables (i.e., volatile organic compounds); (b) acid extractables;
(c) base/neutral extractables; (d) organochlorine pesticides and PCB's
(e) herbicides; and (f) metals and other inorganics. The Annual
Pollutant Analysis (APA) Monitoring Requirement Reporting Form A, to
be provided to all discharges affected by this monitoring requirement,
describes the sampling and analysis requirements and lists chemicals
to be included in the pollutant analysis. This monitoring requirement
is to be referred to as the "Annual Pollutant Analysis" (APA).
2) Other significant levels of synthetic organic chemicals must be
identified and approximately quantified. For the purpose of
implementing this requirement, the largest 10 GC/MS peaks in each
organic chemical analytic fraction (or fewer than 10, if less than 10
unidentified peaks) occur for chemicals other than those specified on
the APA Monitoring Requirement Reporting Form A should be identified
and approximately quantified as stated in the APA Reporting Form A
instructions. This part (item 2) of the APA monitoring requirement is
to be referred to as the "10 significant peaks rule".
S. 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.

Permit No. NC0004961
STATE OF NORTH CAROLINA
DEPARTMENT OF NATURAL RESOURCES & COMMUNITY DEVELOPMENT
DIVISION OF ENVIRONMENTAL MANAGEMENT
P E R M I T
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 Power Comvany
is hereby authorized to discharge wastewater from a facility located
at
Riverbend Steam Station
Gaston County
to receiving waters designated as the Catawba River (Mountain Island
Lake) in the Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and
other conditions set forth in Parts I, II, and III hereof.
This permit shall be effective
This permit and the authorization to discharge shall expire at
midnight August 31, 1989
Signed this day of
R. Paul Wilms, Director
Division of Environmental Management
By Authority of the Environmental
Management -Commission

Permit No. NC0004961
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1. Enter into a contract for construction of any
additional wastewater treatment facilities necessary to
comply with the final effluent limitations contained in
this permit, and
2. Continue to discharge once through cooling water from
outfall 001, and
3. Continue to operate a 5.98 MGD treatment facility (002)
consisting of a 3,000 gallon septic tank followed by
tertiary treatment in an ash basin treatment system,
and
4. After receiving an Authorization to Construct from the
Division of Environmental Management, construct and
operate additional wastewater treatment facilities to
discharge stormwater runoff from a new dry flyash
landfill (See Part III of this permit), and
5. Discharge from said treatment works into the Catawba
River (Mountain Island Lake) which is classified Class
"WS—III & B" waters in the Catawba River Basin.

A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning oni-the effective date of the Permit and lasting until expiration,
permittee is authorized to discharge from outfall(s) serial number(s),001 once through cooling water
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
Temperature 0C(oF)
Residual Chlorine**
35 (95)
THERE SHALL BE NO CHROMIUM, ZINC, OR COPPER ADDED TO THE COOLING WATER.
Monitoring Requirements
Measurement Sample * Sample
Frequency Type Location
Daily Pump Log or
similar reading
Daily Grab
Weekly Grab
*The Regional Administrator has determined pursuant to Section 316(a) of the Act that the thermal component
of the discharge assures. -the protection and propagation of a balanced, indigenous population of shellfish,
fish, and wildlife in andon the receiving body of water.
**Monitoring requirements only apply if. chlorine is added to the cooling water.
The permittee shall obtain authorization from the Division of Environmental Management prior to utilizing
any biocide in the cooling water (See Part III of this permit),
Effluent
Effluent
Effluent
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on the effective date of the Permit and lasting until expiration, the
permittee is authorized to discharge from outfall(s) serial number(s). 002. Ash Settling pond (with domestic
Such discharges shall be limited and monitored by the permittee as specified below: wastewater)
Ffluent Characteristics Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
Flow
Total Suspended Solids 1/
Oil and Grease
Total Copper
Total Iron
Total Arsenic
Total Selenium
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Total Vanadium**
Monitoring Requirements
Measurement Sample Sample
Frequency Type Location
Weekly
30.0 mg/l
100.0 mg/l
2/Month
15.0 mg/l
20.0 mg/l
2/Month
1.0 mg/1
1.0 mg/1
2/Month
1.0 n:g/l
1.0 mg/1
2/Month
470.0 ug/1
2/Month
47.0 Ug/l
2/Month
Monthly
Monthly
Quarterly
Pump logs or Effluent
Similar readings
Composite
Effluent
Grab
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
*Effluent sampling shall be conducted at the discharge from the Ash Settling Pond prior to mixing with any other stream.
**Monitoring for Vanadium shall only be conducted for any quarter during which the generating plant is oil fired.
The metal cleaning waste, coal pile runoff, ash transport water, low volume waste, and domestic wastewater shall be
discharged into the Ash Settling Pond..
1/Daily average of 50 mg/l is permitted provided that the permittee can satisfactorily demonstrate that the
difference between 30 mg/l and 50 mg/1 is due to the concentration of total suspended solids in the source
r) M a
body. o a
Q 1.
4- H
tp
O� Z
r �
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
and shall be monitored 2/Month by grab samples at the confluence of the discharge and the receiving waters.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (3) EFFLUENT LIMITATION AND MONITORING REQUIREMENTS -
FINAL
During the period beginning on
the effective date of the permit
and lasting until expiration,
the permittee is authorized to
discharge from outfall serial
number 003-sludge/landfill
settling
pond.
Such discharges shall be limited
and monitored by the permittee
as specified below:
Effluent Characteristics
Discharge
Monitorin
Re uirements
kg/day
-Limitations
(lbs/da ) Other Units
(Specify)
Measurement
Sample
Sample**'
Dail-Avg_Daily
Max.,Daily-Avg_--Dai].y-Max_-----Frequency_-___Tyge
___Location
Flow
Weekly
Instantaneous
E
Oil and Grease
15.0 mg/l
20.0
mg/l 2/Year
Grab
E
Total Suspended Solids
30.0 mg/l
100.0
mg/l 2/Year
Grab
E
Total Copper
1.0 mg/l
1.0
mg/1 2/Year
Grab
E"
Total Iron
1.0 mg/l
1.0
mg/l 2/Year
Grab
E
Total Arsenic
470.0
ug/l Annually
Grab
E_
Total Selenium
47.0
ug/l Annually
Grab
E
Total Vanadium**
Annually
Grab
E
Total Phosphorus
Annually
Grab
E
Total Nitrogen (NO2+ NO3 + TKN)
Annually
Grab
E
Cadmium
Annually
Grab
E
Lead
Annually
Grab
E
Zinc
Annually
Grab
E
*During all periods of active landfill activity, the measurement
frequency shall be increased as
follows:
Flow - Daily
Oil & Grease, Total Suspended Solids, Total Copper, Total Iron and pH - Weekly
Total Arsenic, Total Selenium and Total Vanadium - Bi-Weekly
Total Phosphorus and Total Nitrogen - Quarterly
Active landfill activity shall be considered to include, but not limited to, any significant land
disturbing activities including placement of sludge, compaction and final grading. The period of
active landfill activity shall generally be considered to last until final grading of top cover soil
and planting of vegetative cover have been completed.
**Monitoring for Total Vanadium shall only be conducted for any year during which the generating plant is
oil fired.
k**Sample location: E - Effluent
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be
monitored 2/Year by grab samples at the effluent.
,1, 1i t 1.7.,11,1 - r r, .,,-r . 1 1 1 1. „i. •1,1 fn•, ;,i other than trace amounts.

A. (4). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period
beginning on the effective date of the Permit
and lasting until
expiration,
the
permittee is authorized to discharge
from outfall(s)
serial number(s).
004 Dry Flyash Landfill
Such discharges shall
be limited and
monitored by the
permittee
as specified below:
Effluent Characteristics
Discharge
Limitations
Monitoring Requirements
Kg/day
(lbs/day)
Other Units
(Specify)
Measurement
Sample
* Sample
Daily Avg.
Daily Max.
Daily Avg.
Daily Max.
Frequency
Type
Location
Flow
0.16 MGD
Continuous
Recording
I or E
Total Suspended Solids
30.0 mg/l
100.0 mg/1
2/Month
Composite
E
E
Oil and Grease
15.0 mg/l
20.0 mg/l
2/Month
Grab
E
Arsenic
470.0 ug/1
2/Month
Composite
Selenium
47.0 ug/l
2/Month
Composite
E
Total Nitrogen (NO2 + NO +
TKN)
Quarterly
Quarterly
Composite
Composite
E
E
Total Phosphorus
Total Copper
1.0 mg/l
1.0 mg/l
2/Month
Composite
E
Total Iron
1.0 mg/l
1.0 mg/l
2/Month
Composite
E
Total Vanadium**
Quarterly
Q y
Composite
E
*Effluent sampling shall be
conducted at the discharge
from the
dry flyash
landfill prior to
mixing with
any
other waste stream.
Sample locations: E - Effluent, I - Influent
**Monitoring for Vanadium shall only be conducted for any quarter during which the generating plant is oil fired.
The pH shall not be less than 6.0 standard units nor greater than 9.o standard units
and shall be monitored 2/Monthby grab sample at the confluence of the discharge and the receiving waters.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Part III Continued
Permit No. NC0004961
F. Toxicity Repener
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 may be
expected in the receiving stream as a result of this discharge.
G. In the event that waste streams from various sources are combined
for treatment or discharge, the quantity of each pollutant or
pollutant property attributable to each controlled waste source
shall not exceed the specified limitation for that waste source.
H. There shall be no discharge of polychlorinated byphenyl compounds
such as those commonly used for transformer fluid.
I. The permittee shall not use any biocides except these 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 Environmental Management.
Such notification shall include completion of Biocide Worksheet
Form 101 and a map locating the discharge point and receiving
stream.
J. Continued intake screen backwash discharge is permitted without
limitations or monitoring requirements.
R. Nothing contained in this permit shall be construed as a waiver by
the permittee or any right to a hearing it may have pursuant to
State or Federal Laws or regulations.
L. The term "low volume waste sources" means the.waste is taken
collectively as if from one source except those for which specific
limitations are otherwise established in this part. Low volume
wastes sources include but are not limited to: wastewaters from
wet scrubber air pollution control systems, ion exchange water
treatment system, water treatment evaporator blowdown, laboratory
and sampling streams, boiler blowdown, floor drains, cooling tower
basin cleaning wastes, and recirculating house service water
systems. Sanitary and air conditioning wastes are not included.
M. 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.
Metal cleaning will be conducted according to Duke Power's approved
equivalency demonstration.
N. The term "chemical metals 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.

• 0. It has been determined from information submitted that the plans
and procedures in place at Riverbend Steam Station are equivalent
to that of a BMP.
P. "Upset" means an exceptional incident in which there is
unintentional and temporary noncompliance with technology based
permit effluent limitations because of factors beyond the
reasonable control of the permittee. An upset does not include
noncompliance to the extent caused by operational error, improperly
designed treatment facilities, inadequate treatment facilities,
lack of preventive maintenance, or careless or improper operations.
Q. Any discharge of domestic wastewater from the existing sand filter
treatment system constitutes an illegal bypass. An occurrence of
this type must be reported promptly to the Division of Enironmental
Management and corrected immediately.
R. If the permittee, after monitoring for at least six months,
determines that he is consistently meeting the effluent limitations
contained herein, the permittee may request of the Director that
the monitoring requirements be reduced to a lesser frequency.
S. An assessment should be made of the existing groundwater quality in
the immediate vicinity of the dredge pond. If contaminants are
encountered at or below a depth of 20 feet, the vertical extent of
those contaminants should be established. This assessment should
be made prior to use of the dredge pond in order that background
groundwater quality can be established.
T. A similar assessment should be made to establish groundwater
quality around the periphery of the existing ash ponds. Since
groundwater in the vicinity of the ponds will ultimately discharge
into the Catawba River, discovery of any contaminants in the GA
zone should lead to determine in which areas, at what depths and in
what concentrations those contaminants are entering the river. The
permittee should, within 90 days of permit issuance, submit to the
Department for approval a proposed plan to assess groundwater
quality at the existing fly ash basins. The plan should include
(a) a schedule for completion of each phase of the investigation
and (b) a proposed monitoring well network sufficient to detect any
contaminants which could reach the river.

Ja Eo Sr )�,s ,gel r�"/t
UNITED STATES ENVIRONMENTAL PROTECTION AGENQ
\01 ; r
PaotREGION IV
345 COURTLAND STREET a;
ATLANTA. GEORGIA 30355 OEC 31
December 23, 1986
REF: 4WM-FP
Dr. George Everett, Chief
Water Quality Section
Division of Environmental Management
NC Dept. of !gatural Resources
and Community Development
P.O. Box 27687
Raleigh, NC 27611-7687
RE: Riverbend Steam Station
NPDES Permit No. NC0004961
Dear Dr. Everett:
yPk I �"1L! i f
Si C i0IN
1
.11 - :i"iZ
iAN 2 33�
We are in receipt of your proposed modification to the subject permit dated
December 9, 1986. Review of the permit indicates that comments presented in
our May 8, 1986, letter generally have been addressed. We have no objection
to issuance of the proposed permit; however, we do recommend that the follow-
ing changes be made prior to issuance:
1. OSN 001. At present the pernittee does not chlorinate the once -through
cooling water; however, both the draft and proposed permit contain a
provision allowing the future additicn of chlorine subject only to a
requirement to monitor "residual chlorine" Dy weekly grab. Although we
failed to catgnent on this provision previously, allowing a future dis-
charge of chlorine without permit modification would be inconsistent
with EPA regulations, unless an appropriate limitation exists in the
permit. We recommend that 40 CFR 423 limitations on the discharge of
"total residual chlorine" (TRC) be included when the permit is issued
(or all reference to chlorine be deleted). Suggested monitoring for TRC
is 1/week by multiple grabs taken over the entire period of chlorine
discharge.
2. OSN 002. Information provided indicates that "sufficient capacity"
(as defined in the August 1985, Harmer Memorandum) exists in the ash
pond for the term of the permit and use of dry weather limitations is
appropriate. However, monitoring requirements during periods of high
rainfall runoff have not been included in the permit, as recommended by
Section VI of the Memorandum. A copy of permit language used in other
permits is provided as Attachment A.
3. Part III.I (previously III.H). This paragraph has been modified and
deletes specific data required from the pennittee should he propose use

-2-
of additional biocides in the cooling systems. Instead, the permit now
requires submittal of Form 101, which we do not have. We would appre-
ciate receiving a copy of this Form, which we assume to require similar
information to that of the draft permit. It is suggested that the
permit include a statement that "Discharge of any product registered
under the Federal Insecticide, Fungicide, and Rodenticide Act to any
waste stream which ultimately may be released to waters of the United
States is prohibited unless specifically authorized elsewhere in this
Permit." This wording applies to all waste streams and not just cooling
water.
Should you have any questions, please feel free to contact Mr. Charles Kaplan
of my staff at the above address or at 404/347-3012.
Sincerely yours,
John T. Marlar, Chief
Facilities Performance Branch
Enclosure
cc with enclosure: Mr. S.B. Hager, Duke Power Co.

Page I-1
Permit No. TN0005789
A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
1." During the period beginning on the effecti've date
of spermit,
ashtpondlasingtdischargeetoxcoolingnwater,
epiratiodate
permittee is authorized to discharge
from outfall
serial number
.discharge.
V Such discharges shall be limited and
monitored by
the permittee as
specified below:
Limitations
Monitoring
Requirements
Effluent Characteristic -
Measurement
Measurement
Sample
Daily Avg
Daily Max
Frequency
Type
1/week
Weir
Flow - m3/day (MGD)
15 m�;/1
20 mg/1
Z/monthl/
Grab
Oil and Grease
30 mb/1
lU0 mg/1
�./monthl/
Grab
Total Suspended Solids
_
1/quarter
Grab
_
Chromium (Total) .
The effluent pH shall not be less than 6.0 standard units at any time, and shall be monitored 1/week by
grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
specified above shall be taken at the discharge
Samples taken in compliance with the monitoring requirements
from ash pond prior to mixing with any other waste
�3
l/ One additional grab sample shall be collected and analyzed for Oil and Grease and Total Suspended
rainfall event exceeding one inch per day.
N
Solids
during the period of maximum expected flow for each
be The permittee shall report
the presence of cenospheres in.._
The
corresponding flow shall reported.
following the effective date
of this permit, the permittee
0
the
samples. After a period of one year
or reduction of frequency of this sampling.
cn
may
request elimination
•V
m
I

i ARr ).. i
Page III-1
Permit No. TN0005789
PART III
OTHER REQUIREMENTS
A. Reporting of Monitoring Results
Cd14A1e14^'1® //�
Monitoring results obtained during the previous calendar quarter shall be
summarized for each month (each quarter if monitoring frequency is quarterly)
and must be reported on a.Discharge Monitoring Report Form (EPA No. 3320-1),
postmarked no later than the 28th day of the month following the completed
calendar quarter. (For a%ample, data for January -March shall be submitted by
April 28•) Duplicate signed copies of these, and all other reports required
by Section D of Part II, Reporting Requirements, shall be submitted to the
Permit Issuing Authority and the State at the following addresses:
Environmental Protection Agency
Region IV
Facilities Performance Branch
Water Management Division
345 Courtland Street, N.E.
Atlanta, Georgia 30365
B. Reopener Clause
Division of Water Management
Tennessee Dept. of Health and Environment
T.E.R.R.A. Building, Second Floor
150 Ninth Ave., North
Nashville, Tennessee 37203
This permit shall be modified, or alternatively revoked and reissued, to
comply with any applicabli- effluent standard or limitation issued or approved
ender Sections 301(b)(2)(C;, and (D), 304(b)(2), and 307(a)(2) of the Clean
Water Act, if the effluent standard or limitation so issued or approved:
1. Contains differer..: conditions or is otherwise more stringent than
any effluent limi_ation in the permit; or
2. Controls any pollutant not limited.in the.permit.
The permit as modified or 'reissued under this paragraph shall also contain
any other requirements of the Act then applicable.
ASS ! On� �o / ✓inC l�S� �Ol' �,G,Q�i�w� '�o hs��
C. Ash Pond Volume g 1L/8S Co- vf�"'U ✓� `s �,�
Beginning on the'effective date of this permit and lasting until the expiration�'S
date, the permittee,shall provide and maintain a minimum free water volume (i.e., �oabt..
between the top of.the sediment level and the discharge elevation) in the ash pond
(outfall serial number 001) of 346 acre-feet (113 million gallons). Periodically.
during the term of the permit, the permittee shall remove settled material from
the pond, or otherwise enlarge the available storage capacity, in order to maintain
the required minimum volume. Within 90 days of the effective date of this permit,
and annually thereafter, the permittee shall determine and retort ;Q.thf_2e.i'q1.t
issuing authority, the ,actual free water water volume of the ash pond, and
physical measurements of the dimensions of the free water volume in sufficient
detail to allow validation of the calculated volume. Annually thereafter, the
sh 11 cert'fy that the required volumes are available and shall report
permuttee
a
the basis
cn widdh the certifications
are made.
it
a..,�. .�

State of North Carolina
Department of Natural Resources and Community Development
Division of Environmental Management
512 North Salisbury Street • Raleigh, North CarAlina 27611
C. DEpr' Og
James G. Martin, Governor �� setjRc FA . Paul Wilms
S.Thomas Rhodes, Secretary r c-Vtc Director
/Ii (i ^.. + tr3, t i v 1 � J v"
MAR
>iF 1989
Subject: N11AE P_e.rir�''it , pu cation
NPDES Fe;j �X6fL I, COO d,'frtl
z
County
Dear a� w . °art :
This is to acknowledge,'receipt of the following documents on f AA> ,< 114 - Application Form,
Engineering Proposal (for proposed control facilities),
R,- Request for permit renewal,
Application Processing Fee of
Other
The items checked below are needed before review can begin:
Application form (Copy enclosed),
Engineering Proposal See Attachment),
Application Processing Fee of $ ,
Other
If the application is not made complete within thirty days, it will
be returned to you and may be resubmitted when complete.
This application has been assigned to r r`
(919/733-5083) of our Permits Unit for review. You will be advised of
any comments recommendations, questions or other information necessary
for the review of the application.
I am, by copy of this letter, requesting that our Regional Office
Supervisor prepare a staff report and recommendations regarding this
discharge. If you have any questions regarding this application, please
contact the review person listed above.
Simon a rtly,
yf
e jr
61.
rthur Mouberry, P.E.
~Supervisor, Permits and Engineering
Pollution Prevention Pays
P.O Box 27697, Raleigh, North Carolina 27611-7687 Telephone [phone]

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II

FOFM U.S. ENVIRONMENTAL PROTECTION AGENCY
e>t'1APPLICATION FOR PERMIT TO DISCHARGE WASTEWATER
'r'EXISTING MANUFACTURING, COMMERCIAL, MINING AND SILVICULTURAL OPERATIONS
fYPC;4S ��EMMA Consolidated Permits Program
1. OUTFALL LOCATION
For each o.,fall, list the latitude and longitude of its location to the nearest 15 seconds and the name of the receiving water.
NUMB
!ILSr _
S. LATITUDE
C. LONGITUDE
D. RECEIVING WATER /name!
. Dome
a. arias.
a, sac.
001
35
21
28
80
58
29
Catawba Rive-
002
35
21
28
80
58
29
Catawba River
*003
35
2.1
28
80
58
29
Catawba River
*004
35
I 21
28
80
53
29
Catawba Rive
11. FLOWS, SOURCES OF POLLUTION, AND TREATMENT TECHNOLOGIES
A. Attach a line drawing showing the water flow through the facility. Indicate sources of intake water, operations contributing wastewater to the effluent,
and treatment units labeled to correspond to the more detailed descriptions in Item B. Construct a water balance on the line drawing by showing average
flows between intakes, operations, treatment units, and outfalls. If a water balance cannot be determined itg., for certain mining activities), provide a
pictorial description of the nature and amount of any sources of Water and any collection or treatment measures.
B. For each outfall, provide a description of: (1) All operations contributing wastewater to the effluent, including process wastewater, sanitary wastewater,
cooling water, and storm water runoff; (2) The average flow contributed by each operation; and (3) The treatment received by the wastewater. Continue
on additional sheets if necessary. (Refer to supplemental information for additional details)
1. OUT-
2. OPERATION(S) CONTRIBUTING FLOW
3. TREATMENT
1FALLN
(lilt)
a. OPERATION (list)
b. AVERAGE FLOW
(include units)
a. DESCRIPTION
LISTTABLE 2C jROM
001
Once through cooling w/intake
87.3 MGD
Screening1-T
~
screen backwash
Discharge to surface water
4-A
002
Ash basin discharge including
1.1 MGD
Chemical coa . & Sediment.
2-D
1-U
sewage system effluent and
Neutralization/Ion Exchange
2-K
2-J
stormwater
Discharge to surface water
4-A
*003
Transformer cooling water
.45 MGD
Discharge to surface water
4-A
(non -contact cooling water)
(via oil.trap tank)
*004
Combustion Turbine cooling
.11 MGD
Discharge to surface water
4-A
water (non -contact cooling
(via oil trap tank)
water)
OFFICIAL USE ONLY (effluent guidelines sub -categories)
EPA Form 3510-2C (Rev. 2-85) PAGE 1 OF 4 CONTINUE ON REVER
*FOR IDENTIFICATION PURPOSES ONLY.

C. Except for storm runoff, -eakS, or ;pills, are any of the discnarges descricea in Items I I -A or B intermittent or seasonal
i YES (complete the following table) NO Ito to Section 111) ,
3. FREQUENCY #
4. FLOW
t. OUTFACE
2. OPERATION(s)
a. DAYS
b. MONTHS
e• FLOW RATE
((n mod)
b. TOTAL VOLUME
NUMBER
CONTRIBUTING FLOW
PER WEEK
PER YEAR
(specify with Ynits)
G OUR -
1. LONG TERM
2. MAXIMUM
1. LONG TERM
2. MAXIMUM
(list)
(list)
(specify
(specify
ATION
average)
average)
AVERAGE
OAILT
AVERAGE
DAILY
(in days)
*004
Combustion Turbine cooling
water
/The duration and flow will
a dependent
upor
system
load re
uiremen
s. See
Item
II-B for historical avg. op
I
rating conditior.
III. PRODUCTION
A. Does an effluent guideline iimitation promulgated by EPA under Section 304 of the Clean Water Act apply to your facility?
YES (complete Item III-B) E: NO (to to section IV)
B. Are the limitations in the applicable effluent guideline expressed in terms of production /or other manure of awation)?
OYES !complete Item III-C) g NO (go to Section IV)
C. If you answered "yes" to Item Ill-B, list the quantity which represents an actual measurement of your level of production, expressed in the terms and units
used in the applicable effluent guideline, and indicate the affected outfalls.
1. AVERAGE DAILY PRODUCTION
_ __-_ _
z. AFFECTK0
C. OPERATION, PRODUCT, MATERIAL, ETC.
a. OVANTITT PER OAT b. UNITS OF MEASURE (specify)
OUTFALLS
(list 0"t/au numbeft)
IV. IMPROVEMENTS
A. Are you low required by any Federal, State or local authority to meet any implementation schedule for the construction, upgrading or operation of waste-
water treatment equipment or practices or any other environmental programs which may affect the discharges described in this application? This includes,
but is not limited to, permit conditions, administrative or enforcement orders, enforcement compliance schedule letters, stipulations, court orders, and grant
or loan conditions. EYES (complete the following table) X NO (go to Item IV-B)
1. IDENTIFICATION OF CONDITION,
2• AFFECTED OUTFALLS
p. FINAA MC
ATE
AGREEMENT, ETC.
3. BRIEF DESCRIPTION OF PROJECT
a. No. b.SOVRCE OF DISCHARGE
a PRO.
JECTEO
a. RE-
OUIREO
I
• I
I
S. OPTIONAL: You may attach additional sheets describing any additional water pollution control programs (or other environmental projects which may affect
your discharges) you now have underway or which you plan. Indicate whether each program is now underway or planned, and indicate your actual or
planked schedules for construction. �MARK "X" IF DESCRIPTION OF ADDITIONAL CONTROL PROGRAMS IS ATTACHED
erA corm 3b10-ZC (Rev. 2-85) PAGE 2 OF 4 CONTINUE ON PAGE 3

CONTINUED FROM PAGE 2 I NC 0004961
Approval expires 7-31 88
V.ANT<.KE AND.EFFLUENT CHARACTERISTICS
A, H, & C: sw instructions before proceeding — Complete one set of tables for each outfall — Annotate the outfall number in the specs provided.
,NOTE: Tables V-A, V-8, and V-C are included on separate sheets numbered V-1 through V-9.
D. Use the space below to list any of the pollutants listed in Table 2c-3 of the instructions, which you know or have reason to believe is discharged or may be
discharged from any outfall. For awry pollutant you list, briefly describe the reasons you believe it to be present and report any analytical data in your
possru+on. (See supplemental information for details. )
1. POLLUTANT
2. SOURCE
i. POLLUTANT
2. SOURCE
Asbestos
Cleanup of containment +
areas involved w/asbestos
stripping/handling operatio s
Discharge is to ash basin
(outfall 002)
I
VI. POTENTIAL DISCHARGES
NOT COVERED BY ANALYSIS
a substance or a component of a substance which you currently use or manufacture
as an intermediate or final product or
Is any pollutant listed in Item V-C
byproduct?
J YES (list ail such pollutants below) XXNO Igo
to Item VI-B)
EPA Form 3510.2C (Rev. 2-85)
PAGE 3 OF 4 CONTINUE ON REVERSE

Vt 11_ Rini nr:IrAl TllY l/"ITV Tc cTiw�r_
you have any knowledge or reason to believe that any olologlcai test for acute or chronic toxicity has been made on any of your discharges or o,,
.'i0whring water in relation to your discharge within the last 3 years?r a
KXYRS (identify the testis) and describe their purposes below) No (`o to Section Vill)
Fathead minnow acute 96-hour flow -through test.
Certodaphnia 7-day chronic survival and reproduction test. The purpose of both tests was for
in-house knowledge of whether the discharge was toxic. The results of these tests indicate
that there is no toxicity in the discharge.
III CONTRACT ANALYSIS INFORMATION
Were any of the analyses reported in Item V performed by a contract laboratory or consulting firm?
YES (list the name, address, and telephone number of, and pollutants No (go to Section IX)
analyzed by, each such laboratory or firm below)
A. NAME
B. ADDRESS C. TELEPHONE
iarea code I no.
D. POLLUTANTS ANALYZED
Enwri_ght Laboratories, Inc.
I P. 0. Box 5287 [phone]
Part V-C parameter
Greenville, SC 29607
and Radium 226 and
total Radium
IX. CERTIFICATION
i
i
I
i
l certify under penahy of Is that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the s ystem or
those persons directly responsible for gathering the information, the information submitted ts, to the best of my knowledge and belief, true, accurate, and complete.
l am aware that there are significant penakies for submitting false information, including the possibility of fine and imprisonment for knowing violations.
A. NAME & OFFICIAL TITLE (type or prinfi
B. PHONE NO. larea Code & noJ
William 0. Parker, Jr.
Vice Presid t, Fossil Product on pepartment
[phone]
C. SIGNATURE
D. DATE SIGNED
�/,(��J L_
L/ r
w... -c�. inev, a-oai PAGE 4 OF 4

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Ly �4• ,
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Duke Power Co.
c
Charlotte. N.C. ---

RIVERBEND STEAM STATION
NPDES DISCHARGE POINTS

EPA I.D. NUMBER (Copy from Item 1 of Form 1)
PLEASE PRINT OR TYPE IN THE UNSHADED AREAS ONLY. You may report some or all of Form Approved
v p Riverbend Steam Stl:.f:ion OMB No 2040-0086
this information on separate sheets (use the same format) instead of completing these pages. NC 0004961 Approval expires 7-31-88
SEE INSTRUCTIONS. CCW
NO
V. INTAKE AND EFFLUENT CHARACTERISTICS (continued froin page 3 of Form ? C/
W7777LL
001
PART A - You must provide the results of at least one analysis for every pollutant in this table. Complete one table for each outfall. See instructions for additional details.
2. EFFLUENT
3. UNITS
4. INTAKIi o tiona!
I. POLLUTANT
(specify If blank)
a. MAXIMUM DAILY VALUX
. M XINt� M 3o pA Y VALUE
(fr avnllOble
C•
ana a F.
d. NO. OF
a. LONG
b. No. OF
1
( )
(:) Mwsa
II)
TRATION
(:) Mws■
(1)
CONCENTRATION
):) MAss
ANALYSES
a.CONCEN-
TRATION
ft MASS
II)
CONCENTRAT
ea
ANALYSES
a. Biochemical
0><y n Demand
(Bor
2.6
2194
1
mg/1
lb/day
3.4
2477
1
b. Chem cal
0><y•pj n;Q�laarld
(co
6.7
5653
1
mg/1
lb/day
5.8
4225
1
C. Total Oryanit
Carbon i?nC)
2.5
2109
1
mg/1
lb/day
1.9
1384
1
d. Total Suspended
Solids(WS)
9
7593
1
mg/1
lb/day
7
5100
1
e. Ammonie (as N)
.06
51
1
mg/1
lb/day
.05
36
1
I. Flow
VALUE
VALUE
VALUE
VALUE
101.1
96.9
87.3
153
MGD
87.3
153
9• Temperature
VALUE
VALUE
VALUE
VALUE
(Winter)
26.4
23.6
17.7
88
oC
13.0
88
h. Temperature
VALUE
VALUE
VALUE
VALUE
(summer)
36.3
MINIMUM MAXIMUM
34.9
33.3
65
0C
27.8
65
MINIMUM
MAXIMUM
i. PH
8.0
1
STANDARD UNITS
PART 8 - Mark ­X­ in column 2-a for each pollutant you know or have reason to believe is present. Mark "X" in column 2-b for each pollutant you believe to be absent. If you mark column 2a for any pollutant
which is limited either directly, or indirectly but expressly, in an effluent limitations guideline, you must provide
the results of at least one analysis for that pollutant. For other pollutants for which you mark
column 2a, you must provide quantitative data or an explanation of their presence in your discharge. Complete one table for each outfall. See the instructions for additional details and requirements.
t. POLLUT-
2. MARK 'X'
3. EFFLUENT
4. UNITS
5. INTAKE (optional)
ANT AND
CAS NO.
a. sE-
LIEVE
b. EE
LIEVE
a. MAXIMUM DAILY VALUE
b. MAXIM �M S9 DAY VALUE
tl ill
I nvo a e
C.L NG T VF
ouo b!t
VALUE
dNo. O
a. a.ONCEN-
a. LONG
AVERAGE VALU!
No. or
��aa����
(if avWWble)
•RE-
LENT
Al-
SENT
ANAL -
YSES
-RATION
b. MASS
ANAL
YSES
1
CONCENTRATION
IP) MASS
1
CONCENTRATION
1') M^S%
1
CONCENTRATION
I=)
MASS
1
CONCENTRATION
(:) MASS
a. Bromide
(24959-67-9)
X
c, 2
c 169
1
mg/1
lb/day
c. 2
< 146
1
b. Chlorine,
TotallllaaBdual
X
In
0
b 1,4ay
0
0
1
C.Color
X
10
X
�.
ts
X
10
X
1
d. Fecal
olonies
Collform
X
33
X
1
X
49
X
1
1:0 ril
+
e..F luorWa
(tB�s44e�►
X
.10
84
1
Mg/1
lb/daylb/day
73
1 f
J. Nltrato—
NItrit* (of W,
X
.054
46
1
mg/1
lb/day
. 059
43
i
1
EPA Form 3510-2C (Rev. 2-85) rave v-1
CONTINUE ON REVERSE

ITEM V.R rnMT111111Cfl FRnIA Coe h-
ANT
1AN AN:!
AN.
. MARK •X'
_ 3. EFFLUENT
4. UNITS
S. INTAKE (optional)
a.EL- b.■E-
IEVE IEvto
rwE- Ae-
b. MAXI M 9 V VALUE c. N /i /lVR
e• MAXIMUM DAILY VALUE ayaj�g4aV a VALUE
d. NO.OF
a.CONCEN-
�p1�G �gq
A0ER AGE VALUE No. of
1
CONCENTRATION
ITI MASS
CONC LNTAATION
(_) MASS
1
CONCENTRATION
S MASS
( ►
ANAL-
YaEf
,I
(if vvallabie)
LENT SENT
TRATION b. MASS
ANAL
CONCENTRATION 1.1 MASS VSES
9,14 trOsen,
Total Organic
(a■ N) �
X
. 40
337
1
mg/1 lb/day
.30 219 1
I,. ol: aed
ores..
X
c.1
c 84
1
mg/1
lb/day
c .1
c 73
1
i. Phosphorus
(as P), Total
(77z314-0)
X
c.015
c 13
1
mg/1
lb/day
c .069
c 50
1
). Radioactivity
Tot; IP11a, X
c . 5
X
1
PCi/1
X
.4+.2
X
1
(2) Bets,
X
1
Total
X
4.5+.6
X
1
PCi/1
X
.18+.4
T ) Radium.
EEE
X
1
X
C 2
X
1
PCi/1
X
c 1.5
(4) Radium
226, Total
X
.04+.01
X
1
PCi/1
X
.07+.02
X
1
It. Su ate
(as SO4)
(14808-79.8)
X
7.7
6496
1
mg/1
lb/day
7.8
5682
1
1. sulfide
1.2
874
(� �)
X
0.8
675
-
1
mg/1
lb/day
1
1
mg/1
lb/day
c 2
c 1457
(as S03)
(14265-45-3)
X
c2
c 1687
1
n. surfactants
X
C 01
C 8
.
1
mg/1
lb/day
c .01
c 7
1
o. Aluminum.
-
Total
(7429-9")
X
C• 3
c 253
1
mg/1
lb/day
c. 3
c 219
1
P. a/ um,
-
1
mg/1
lb/day
c .01
c 7
1
Total
(7"0.3111-3)
X
c.011
c 9
a• Boren,
Totalg
(7"0.42•a)
c . 05
c 42
1
mg/1
lb/day
c .05
c 36
1
r.
Total
(74404s-4)
X
c ,1
c 84
1
mg/1
lb/day
c .1
c 73
1
s. Iron, Total
.30
219
1
(743989-6)
X
.28
236
1
mg/1
lb/day
t. McOaaslum,
Toth
(7439•96-4)
X
1.3
1097
1
mg/1
lb/day
1.4
1020
1
u. Molybdenum,
c .02
c 15
Total
743
(7439-s9.7)
X
c.02
c 17
1
mg/1
lb/day
1
v. Mangerwas.-
TOtel
(71310-96-6 )
X
.083
70
1
mg/1
lb/day
1
.059
43
w. Tin, Total
c .5
c 364
1
(7440.31-5)
X
c.5
c 422
1
mg/1
lb/day
x. Tltanlum,
c 4
1
Total
744 1744432-6) X
c.006
c 5
1
mg/1
1b/day
c .006
EPA Form 3610.2r IR...
7.aA1
CONTINUE ON PAGE V - 3

EPA I.D. NUMBER (copy from Item I of Form 1)
OUTFALL NUMBER
Form Approved
NC 0004961
001
CCW OMB No.2040-0086
Approval expires 7.31-88
CONTINUED FROM PAGE 3 OF FORM 2-C
PART C - If you are a primary industry and this outfall contains process wastewater, rater to Table 2c-2 in the instructions to determine which of the GC/MS fractions you must test for. Mark "X" in column
2-a for all such GC/MS fractions that apply to your industry and for ALL toxic metals, cyanides, and total phenols. If you are not required to mark column 2-0 (secondary industries, nonprocess
wastewater ourfalls, and nonrequired GC/MS fractions), mark "X" in column 2-b for each pollutant you know or have reason to believe is present. Mark "X" in column 2-c for each pollutant you
believe is absent. If you mark column 2a for any pollutant, you must provide the results of at least one analysis for that pollutant. If you mark column 2b for any pollutant, you must provide the results
of at least one analysis for that pollutant if you know or have reason to believe it will be discharged in concentrations of 10 ppb or greater. If you mark column 2b for wolein, scrylonitrile, 2,4
dinitrophenol, or 2-methyl-4, 6 dinitrophenol, you must provide the results of at least one analysis for each of these pollutants which you know or have reason to behave that you discharge in
concentrations of 100 ppb or greater. Otherwise, for pollutants for which you mark column 2b, you must either submit at least one analysis or brieflydescribe the reasons thepolkitant is expected to
be discharged. Note that there are 7 papas to this part; please review each carefully. Complete one table (all? pages) for each outfall. See instructions for additional details and requirements.
I. POLLUTANT
2. MARK 'X'
3. EFFLUENT
4. UNITS
X0"TAKE
(optional)
AND CAS
NUMBER
T•'T
1«e
b `•
C ■c-
a. MAXIMUM DAILY VALUE
b. MAXI M'a
audtaAle
DAY VALUE
C.LONG T M AYR VALU[
auWtaete
d No.OF
-
a. CONCENIEVALUE
t,Q
TERM
b, NO.or
llauotbble
( )
Rc-
GUIR-
Icvc
.wc-
SM
Icvc
wa-
aaNT
ANAL-
TSES
TRATION
b MASS
ANAL
YSES
(,)
I•I MAfi
1
(a) MA■S
1
1 1
Ill MASS
1 co«aaN
( 1
121 MASS
ffnC
ONCt NTRATIOR
CONCENTRATION
CONCENTRATION
R TI N
METALS CYANIDE, AND TOTAL PHENOLS
Antimony,
Total (7440-34-o)
X
• 6
< 506
1
m
y
437
1
.6
2M. Arsenic, Total
(744o-3s-z1
X
� 1
� .84
1
ug /1
1 j /day
+' 1.1
. 60
1
Total1,, Beryllium
Tot 7440-4i
1-7)
X
` .001
C .84
1
m /I
lb/- ay
�' .001
C • 73
1
4M. Cadmium
Total 17440-4i.9)
X
.004
c 3
1
:r.�!.
o t
1b /�i_y
:' , o04
c 3
1
5M. Chromium,
Total (7440-47-3)
X
. 03
25
1
Ir/1
lb / i 3y
V' .03
22
1
1 44jT01'I
X
c .03
< 25
1
Ing/1
lb/day
v' .03
22
1
7M. laa4 Tom
p43o-it2-t)
X
` 2
<2
1
u8/1
lb/day
v'2
1.5
1
SM. Mercury, Total
(74"-97-6)
X
�_ .1
..08
1
ugP.
lb/day
v' .1
v' .07
1
1iM.N44Total
(70-02-002-0)
X
.04
34
ra"/l
Wda -1,
.04
29
1
10M. Selenium (7782-46.2)
X
c 2
" 2
1
mg!1
lbMay
-r 2
-.:z 1. 5
1
11 M.(744 Silver, Total
(7440-22-4)
X
c ., 04
:' 34
j
/ L
1 /; . .
1J, jay
C
C 29
1
,dg,
.04
12M. Thallium,
Total (7440.28-0)
X
C . 5
% 422
1
s;g It
Wday
-' , 5
364
1
13M. Zinc, Total
(7440-66-6)
X
.017
14
j
IbMaj,
.02
15
1
14M• Cyanide,
Total (57-12-6)
X
. 01
c $
1
mj./1
:�b!da1
.01
7
1
15M. Phenole,
Total
X
C . 005
C 4
1
mg/1
lb/day
.005
-< 4
1
DIOXIN
2, 3,7,8-Tura-.
DESCRIBE RESULTS
hlorodlbenzo P-
X
NOT DETECTED
t woxia (1764-01-6)
EPA Form 3610-2C (Rev. 2-861 PAGE V-3 CONTINUE ON REVERSE

CO19TINUEP FROM THE FRONT
1- POLLUTANT
t.
MARK
'X'
AND CAS
NUMBER
N,.
LIlV [O
LIEVS
"MAXIMUM DAILY VALUE
l favailable-)
p,11N
S[NT
Sl NT
(li
121 MUSS
C nNIl NTNAr10N
GC/MS FRACTION _ VOLATILE COMPOUNDS
IV. Acrolein•
1107-02.8)
X
c 15
c 13
2V. Acrylonitrlle
(107.13-1)
X
-
-
C 5
-
C 4
3V. Benzene
X
-
(71.43-2)
c ,5
--
c 4
4V. Bis (Chloro-
--
methyl) Ether
(542-88-1)
X
-
c 50
c 13
5V. Brorrloform
(75-25-2)
X
c 5
a 4
6V. Carbon
Tetrachloride
X
C 5
c 4
(56-23-5)-
7V. Chlorobenzens
(108-90-7)
X
-
---
—
C 6
- --
C 5
-
BV. Chlorodi•
C 4
bromomethane
(124.48-1)
X
C 5
9V. Chlorosthens
(75 00-3)
X
--
-
-
C 5
- --
C 4
IOV.2-Chlo►o-
—
ethylvinyl Ether
(110-75-8)
X
C 10
C 8
11 V. Chloroform
(67-66-3)
X
C 5
C 4
12V. Dichloro-
bromornethens
( 75-27-4)
X
c 5
C 4
13V. Dichloro-
—
difluo►omeehern
(75-71-8)
X
c 35
c 30
14V. 1,1-01chioro-
ethane (75-34-3)
X
c 5
c 4
15V. 1,2-Dlchloro-
ethane (107.06-2)
X
c 5
c 4
16V. 1,1-D ich loro-
ethylene (75-35-4)
X
C 5
C 4
17 V. 1,2-Dichiero-
propene(78487-6)
X
c 5
c 4
18V. 1,3-DW*wo-
proprl«le 1642-75-M
X
c 5
c 4
19V. Ethylbanzene
(100.41-4)
X
C 7.2
C 6
20V. Methyl
Bromide (74-83-9)
X
C 10
C 8
21 V. Methyl
Chloride (74-87 3)
X
C ] Q
C 8
PA Form 3510-2C (Rev. 2-85)
3.EFFLUENT
RAWVALE
W -ASS
4. UNITS
IG- VALUE d No of
e. C
ANAL- TRATIONONCEN-
b. MASS
1111wAs[ YSES
S. INTAKE (up
M. LONG TERM
o� 1.1 rw[e
1
ug/1
lb/day
c15
cll
1
ug/1
lb/day
c5
c4
1
ug/1
lb/day
c5
c4
1
ug/1
lb/day
c 50
c 36
1
ug/1
lb/day
c 5
c 4
1
ug/1
lb/day
c5
c4
1
ug/1
lb/day
c 6
c 4
1
1
ug/1
u„/1
lb/day
c 5
c 4
lb/day
c5
c4
1
ug/1
lb/day
c 10
c 7
1
ug/1
lb/day
c 5
c 4
1
ug/1
lb/day
c 5
c 4
1
11g/1
lb/day
c 35
c 26
1
ug/1
lb/day
c 5
c 4
1
ug/1
lb/day
c 5
c 4
1
ug/1
lb/day
c 5
c 4
1
ug/1
lb/day
c 5
c 4
1
ug/1
lb/day
c 5
c 4
1
ug/1
lb/day
lb/day
c 7.2
c 10
c 5
c 7
1
ug/1
1
ug/1
lb/day
c 10
c 7
NO.OI
ANAL
YSES
PAGE V-4
V !,

PA I-D NUMBER (copy from Item I of Form IJ
OU rFALL NUMBER
OMB No. 2040-0086
CONTINUED FROM PAGE V-4
NC 0004961
001
CCW Approval expires 7-31-88
1. POLLUTANT
AND CAS
2. MARK W
3. EFFLUENT
4. UNITS
S. INTAKE /optional)
NUMBER
Tk cT
m�
b. �E-
uWK
c ME-
u•vE
e, MAXIMUM DAILY VALUE
b. MAXI M
OUO
0 DAY VALUE
¢
C.LONG T jiM
iaM=abI¢
AYR VALUE
d NO.OF
•. CONCEN-
S. LONG
TERM
VALUE
b. NO.OI
(it OU0/tOble
w%
Oulw-
•w E-
•CNT
w•-
fENT
ANAL-
USES
TRATION
b. MASSAVERAGE
ANAL
YSES
l I
G On�k T. ATION I=I MAfE
CONCE«Tw ATION
(i) MAff
l')
CONCENTRATION
(:) MASS
(o) ATION -
Tw ATION
(_) MASS
OMS FRACTION — VOLATILE COMPOUNDS (continued)
22V.hylone
idet(75-09 X c 5 C 4
Chloride
Chloride (76-09-2)
1
ug/1
lb/day
c 5
c 4
1
23V. 1,1,2,2-Tetre•
chloroethene
(79-3")
X
c 6.9
c 6
1
ug/1
lb/day
c 6.9
c 5
1
24V.
tyle12718ene11�4
X
c 5
c 4
1
ug,/7-
lb/day
c 5
c 4
1
25V. Tobane
(10e-8e-a)
X
c 6
c 5
1
ug/1
lb/day
'-,6
c 4
1
26V. 1,2-Trens-
Dichloroethylene
(156-60-5)
X
c 5
c 4
1
ug/1_
lb/day
c 5
c 4
1
27V.1,1,1-Trl-
--
-
(71 55 6) hene
X
--
c 5
— —
c 4
1
ug/1
lb/day
c 5
c 4
1
28V. 1,1,2-Trl-
--
179 5')""'
X
c 5
c 4
1
ug/1
lb/day
c 5
c 4
1
29V. Trichloro.
ethylene (79-01-6)
X
C 5
C 4
1
ug/1
lb/day
c 5
c 4
1
3OV. Trichloro-
fluoromethene
(75-09-4)
c 5
c 4
1
ug/1
lb/day
c 5
c 4
1
Vinyl Chloride
Chloride (76-01 4►
X
C 10
C 8
1
ug/1
lb/day
c 10
c 7
1
GCA48 FRACTION — ACID COMPOUNDS
IA. 2-Chloropheno
(96-57-8)
c 10
c 3
1
ug/'
lb/day
c to
7
1
2A.2,4-blc ra
ph -of (1 9-2)
X
<, 10
c 3
1
ug/1
lb al
7
1
3A. VA p�1ethyl-
Ph6nbiyh-lf7-p)
1%
--�
1
ug/1
lb/daj
10
-,7
1
4A. 4,MNnlpo-0-
Creeol1534.62-1)
X
50
c 42
1
ug/].
1'u!3ay
c 50
c 36
1
5A. 2,4-DMltro-
phbool (strZs B)
X
Sp
-; 42
1
ug/1
lb!day
c 50
c 36
1
SA. 2-NiU"henol
(ee-78-e).
X
- 10
-: 3
1
ug/1
1'C!day
', 10
c 7
1
7 A. 4-N hemphenol
-
(100-02-7)
`:
-< 50
42
1
ug/1
lb/daj
c 50
c 36
1
8A. P-Chloro-M-
Creaol 189-507)
20
:7
1
u� /1
Wday
20
r' 15
1
9A. Pent chla7e•
ph.aol (8786-6)
X
c 50
c 42
1
ug/1
lb/day
c 50
c 36
1
IOA: Phenol
(108.95-21
X
c 10
c 8
1
ug/1.
lb/day
c 10
c 7
1
1 IA. 2.4,6-T►i-
chloro6henol
(8£.06-2) .. -
X
C 10
c 8
1
ug/1
lb/day
c 10
'-,7
1

CONTINUED FROM THE FRONT
I PLD NT
ANCAS
z. MARK'X*
3. EFFLUENT
4. UNITS
S. INTAKE (optional)
NU169BER
ra aT b r!- c r!-
ING lava !1lvE
..MAXIMUM DAILY VALUE 0- MAXI M 3�Q pA Y VALUE C.LONG T���2M //1� y�([Itr(�i VALUE
WatlOble (1/ OUQ11a6IC/ d. NO.
e. LONG TERM b NO Ill
EI/pvailable 1
__
ouiw se:lr ae MT
rya--
a. CONCEN-
b. MA
TNATION
(1I cONC.— ANAL
Tw A710N Ill MAaa YSES
I'1 _
CONCl NTNATION I ) MAaa
CONCl N,TNATION
Ill MAa1
I'l
lONC INT_NAIION
Itl MAaa
L-
ANAL-
�•jES
riCiMS FRACTION - BASE(NEUTRAL COMPOUNDS
-
1B. Aceaaphthene
(83.32-9)
x
C 10
c 8
1
ug/1
lb/day
C 10
c 7
1
(20 Acens-96-8) htylene
(208-96-8)
x
Ci 10
p
C' 8
1
u;;/ 1
lb/day
G', 10
c 7
1
3B. Anthraoane
(120-12-7)
x
< 10
8
--
1
ug/1
lb/day
c 10
c 7
1
40. Bomldine
(9247-5)
x
10
8
1
uo/1
lb/day
C 10
c 7
1
BB. Benzo (a)
Anthratwe
66-66.3
X
C 10
C$
1
uk/l
lb/day
c 10
c 7
1
68. Benzo (a)
Pyrarle (60325)
x
c 10
--
c 8
—
1
ug/j
lb/day
c 10
c 7
1
7B.3,4-0Mzo-
-
---
14uoranthene
(206-99-2)
- x
to
8
—
1
ug/1
lb/day
C to
C7
1
as. Benzo—
Pe►ylone
(191.24-2)
X
c 10
c 8
-
--- -- -
1
us/1
lb/day
-,Jo
c7
1
98. Benzo (h)
----
-
-
Flu oN renthN
(207-08-9)
X
C 10
C$
---- —
1
ug/1
lb/day
c 10
c7
1
100. Bia (2-Chloro-
--- ---
) Methane
(111-91-
(t11-9
x
C 10
c 8
1
ug/j
lb/day
C 10
C7
1
11 B. Ble (2-Chloro
--
--- - - -
- - --- - -
— -- — -
-
----
1
ug/i
lb/day
C 10
c7
ethyl) Ether
(111-44-4)
x
10
8
1
120. Bi.n-Ch%rww-
wvp4Einar(102-WI)
X
C 10
C 8
-- - --
-- -- --
-- -
-----
- —
1
11g/1
lb/day
C 10
c7
1 '
138. Bia (2-Bthyl•
1
ucy/1.
lb/day
c 10
c7
1
haxyl) Phthelate
X
10
c 8
- - ----
148. 4-13rorno-
— -
-- -
-
phenVl Phenyl
Ether (Ot•a6-3)
x
C 10
C 8
1
U8/1
lb/day
C 10
c7
1
168. Butyl Benzyl
Phthalate (85-68-71
X
C 10
C $
1
ug/1
lb/day
C 10
c7
1
168. 2-Chbro-
naphthalene
191-88.7)
x
C 10
C 8
1
ug/1
lb/day
C 10
c7
1
17 B. 4-Chloro-
phenylPhenyl
Ether (7005-72-3)
x
c 10
8
1
ug/l
lb/day
10
<7
1 i
188. Chrymne
(218-01-9)
X
c 10
c 8
1
ug
lb/day
10
c7
1
198. DlWnzo (0. )
i/]•
Anthrecone
(63-70-3)
X
c 10
C 8
1
ug/1
lb/day
10
c7
i
1 I
208. 7,2-Diehloro•
benzene (96-60ro
X
C 10
c 8
1
ug/1
lb/day
C 10
c7
1
21 B. 1,3-Diehloro-
benzene (641.7 ro
X
c 10
c 8
1
ug/1
lb/day
C 10
c7
1
., ..,.... JV I V-6V lnwv. L-oop PAGE V-6 CONTINUE ON PAGE V 7

C.._... A....
EPA I.D. NUMBER (Copy from Item I of Form 1)
OUTFALL NUMBER
OMB Nor2040-0086
CONTINUED FROM PAGE V-6 NC 0004961
001
ccw Approval expires 7-31.88
I. POLLUTANT 2. MARK 'x' 3. EFFLUENT
AND CAS
4. UNITS
S. INTAKE (optional)
b. MAXI M DO DAV VALUE c.LONG T MaAYR ,VALVE
NUMBER T��T b �[- C. ��- a. MAXIMUM DAILY VALUE AODftlo /lOO/e d NO -OF
IN4 Irv{ �I�v• OUa
a CONCEN-
a. LONG TERM b. NO. OF
(if available) Ruiw- ii«T •i�+T (') ANAL-
(a) wAss YSES
CONCINTRATIUN l+i MAif CONCINITRA TION irI wAff CONCl NTN ATION
b. MASS
TRATION
ANAL
(11 c..caN-
(-1 rwss Y$ES
GC/W FRACTION - BASE/NEUTRAL COMPOUNDS (continued/
♦RATION
228. 1.4-Dichloro-
benzene (106-46-7
X
c 10
c 8
1
ug/1
l h /da.v
C 1 0
c 7
1
230.3,Y-Diohior
- --
-- -
-
benzidlM
(91-94-1)
c 20
c 17
1
ug/'.
lb/day
c 20
---.-
---
240. Dlethyl
-
-
Phthalatll
(B4se-2)
X
c 10
cg
1
u?/i
lb/day
c 1.0
c 7
j
258. Dimadoyl
--
--- -
P1iia�)
X
c 10
cg
1
ug,/1.
lb/day
c 10
c 7
j
��4�.
X
c 10
c8
1
ug/l
lb/day
c1.0
c 7279.
j
Wkow 4 21-1.
ealuaR. (121-14-21
X
c 10
c8
1
ui /i
lh/dav
.
c.10
c 7
1
2Pp. a'e Dwuua
teM+.M 1406-=0.21
X
c 10
c 8
1
ug/1
lh /dav
c 1.0
c 7
j
298.Ot-N-Ootyl
--
--
�)
X
c 10
c 8
1
up,
lb/day
c 1.0
c 7
j
308.1,2-Dipheny4
- -
-
hyd►azlne (4s Aso-
bensent) I152-86.7
X
C 10
c 8
1
ug /1
lb /dav
c 1.0
c 7
j
31
(20 Fluor RtMtl.
120iM-O)
X
c 10
e 8
1
Ltr , /1
l h /dav
c 1.0
C 7
j
329. Fluorene
(8d.73-7)
X
C 10
C $
-----
1
ug/1
l h /dav
c 10
c 7
j
338. of 1f
_
X
c 1. 0
c R
-
-
1
ug/1
1-h /r1o.r
c 10
c 7
1
chloMlbltt ww
(e�-M4►I
X
c 1.0
c R
1
ug / 1
1 }� /rl ;r
_
-,10
C 7
1
asp. krpcaoh+orn-
c 10
c 7
1
i7y 6 1.1
X
c 10
c 8
1
ug/1
lb/day
388.'HMtwbloro
*the" W-72-1)
X
c 10
c 8
1
uo/l
lb/day
c 10
c 7
1
379. IeW-ad) loymw
c 7
(193.39-s)
X
c 10
c 8
1
ug/1
lb/day
c 10
1
386. laaphorona
(79�9•i)
X
c i0
c 8
1
ug/7-
lb/day
c 10
c 7
1
39B. Naphthalene
(91-20-3)
X
c iG
< 8
1
ug/1
ib/day
c i0
c 7
1
409. Nkrobe :zone
(9e=95-3)
X
c 10
c 8
1
ug/'.
l b/day
c 10
c 7
1
418.. N-Nitro-
sodimethylamine
(62i75-9) -
X
C 10
c 8
1
ug/l.
lb/day
c 10
c 7
1
42B. N-Nitrosodl-
--
N-Propylamine
621-64-7
X
c 10
c 8
1
up/1
lb/day
c 10
c 7
1

CONTINUED FROM THE FRONT
I. POLLUTANT
ANQ CAS
2. MARK •x•
3. EFFLUENT
4. UNITS
6. INTAKE (dptionel)
NUMBER
Tear
,NG
b ■a-
nve
'-
a ■a-
uava
a. MAXIMUM DAILY VALUE
. MAXI M
too/Wg�
JD Y VALUE
C,LONG T M
�%raUalJa
eyp .VALUE
ble
d NO.OF
a. CONCEN-
■ LONG
TERM
b. NO.Or
(�%ovsi%61r)
Ra-
OUIR-
•w
Sw.T
we-
■amT
ANAL-
YSES
TRATION
b. MASS
ANAL
VSES
111 (}) MAaa
CONCLNTRATION
111
CONCYNTNATION
1}I Mwaa
111
CUNCt NTR AT-
(}) MAaf
1.1 CONCaN-
TR ATION
III MAaa
GCA48 FRACTION - BASEMEUTRAL COMPOUNDS (continued)
438. N-Ivitro-
sodiphrnylemine
(86-30-6)
X
c 10
c 8
--
----
1
ug/l
lb/day
10
c 7
1
48. P Bhenenthnne
X
C 10
C$
----
1
Ug, 1
lb/day
C 10
C 7
1
458. IS row
(128
X
C l o
C
1
ug/1
lb/day
c 10
c 7
1
460. 11,2,4 - Tri
--
- -
-- - - -
jzwR2-11) ,
X
C10
c8
1
ug/1
lb/day
C10
c7
1
GC/MS FRACTION.-
PESTICIDES
1P. ► Mi
(300 ..',,.,.
X
C .01
c .01
1
ug/1
lb/day
C .01
c .01
1
2P. a-s"a ;
(3194") ''+
X
c .01
c .01
1
ug/1
lb/day
C .01
c .01
1
3P. M#F1C
(310a114)
X
c .01
c .01
1
ug/l.
lb/day
c .01
c .01
1
4P, s C
0)
(50
X
c .01
c .01
1
ug/1
lb/day
C . 01
c . 01
1
BP. S-SHC
(31s ee e)
X
C .01
c .01
1
ug/1
lb/day
c . 01
C . 01
1
6P. Chlordeile
(57-14-0)
X
c .05
c .04
1
ug/1
lb/day
C . 05
c . 04
1
7P. 4,4'-DDT
(50-29-3)
X
c .02
C .02
1
ug/1
lb/day
C . 02
c .01
1
8P, 4,4'.DpE
(72-58-9)
X
c .01
--,.01
1
ug/1
lb/day
c.01
c.01
1
9P. 4,4'-DDD
472.54-8)
X
c .01
c .01
1
ug/1
lb/day
C . 01
c , 01
1
10P. Dieldrin
(60.57-1)
X
c .01
c .01
1
ug/1
lb/day
c.01
c.01
1
11P. a-6ndosu Man
(115-"-?)
X
c .01
c .01
1
ug/1
lb/day
c.01
c.01
1
12P. Q-Endosulfan
(115-".7)
X
- C .03
C .03
1
ug/i
lb/day
c.03
c.02
1 f
13P, Endosulfan
Sulfate
11031-078)
X
C .05
c .04
1
ug/1
lb/day
c.05
c.04
1 j
i
14P. Endrin
172 20-81
X
c .01
c .01
1
ug/1
lb/day
c.01
c.01
1
1 !
15P. Endrin
---
_
Aldehyde
(1421.93-4)
X
c .02
c .02
1
ug/1
lb/day
c.02
c.01
1 i
16P. Heptachlor
--
(76448)
_
X
c }01
c .01
1
ug/t
lg/day
c.01
c.01
1
-• -•' .T.... "`a. 1nov. c-001 rAUL V-e CONTINUE ON PAGE V-9

EPA I.D. NUMBER (Copy from Item 1 of Form 1)
TFALL NUMBER
OMB No. 2040-0086
CONTINUED FROM PAGE V-8
NC 0004961
001
CCW Approval expires 7-31-88
LUTANT
2. MARK x
3. EFFLUENT
A. UNITS
S. INTAKE (o'tlonat)
FANDCAS
T.aT.aa-G
aa-
aMAXIMUM DAILY VALUE
.MAXI M !
aua
p//►► Y VALUE
1e)
ER AV
c.LONG T M VALUBER
(tf aUo bf:
it NO. OF
a. LONG
TERM
b.NOANAL-
datrG')
ouiw-
ii a
ai«T
YSES
CONCEN-
TRATION
b. MASS
YSES(+I
I'I
MANITTwwT10NRACTION
I+I I SS
('1
ll MA%S
(II cowCa N•
I:) ywu
- PESTICIDES (continued)
17P. Heptachlor
E pox Ida
(1024-67-3)
X
c .01
c .01
-
1
ug/1.
lb/day
C .01
C .01
1
18P. PCB-1242
--
---- - -
(63469-21-9)
X
C .1
_
C .0$
-
1
ug/J.
lb/day
c .1
c . 07
1
19P. PCB-1254
-
(11097-ft-1)
X
C .2
C .17
--
- --
1
llg/1.
lb/day
c .2
c,15
1
20P. PCB-1221
(11104-28-21
X
c .2
c .17
1
ug/1
lb/day
c.2
c.15
1
21P. PCB-1237
(11141-16-B1
X
c .2
C .17
1
ug/.1
lb/day
c.2
c.15
1
22P. PCB-1248
(12672-2")
X
C . 1
C .08
1
ug/1
lb/day
c.i
c.07
1
28P. PCB-1260
(IIOW4 s-6)
X
c .2
c .17
1
ug/1
lb/day
c.2
c.15
1
24P. PC9-1016
(12674-11-2)
X
c .1
C .08
1
ug/1
lb/day
c.1
c.07
1
P.Toxaphene
01 aa21
P
X
c .5
c .42
1
ug/1
11. b/day
c, 5
C.36
1
rM%sC V-9

72i'verbend
D. NUMBER o
cpy front Fleets 1 of Forrrl 1) form Approved
PLEASE PRINT OR TYPE IN THE UNSHADED AREAS ONLY. You may report some or all of Steam Station OMB No 2040 0086
this information on separate sheets fuse the same formad instead of completing these pages. NC 0004961 Approval e•prres 7 31 88
SEE INSTRUCTIONS I Asia Basin
Dill r-A l_l. Nt
V. INTAKE AND EFFLUENT CHARACTLRISTICS b nnlrnued itum pays 3 of rut tit 20
002
- -- ----
PART A - You nttist fnovide the iestilis of at least one analysis fol evely pollutant ill tills lat,le. Complete o1w tollle tut cdLh uutfall. See Instructions for additional details. _
2. EFFLUENT
3. UNITS 4. INTAKE (optional)
_
1. POLLUTANT a. MAXIMUM DAILY VALUE - MAXIM((M 30 DAV VALUE C LONG TERM A�([� VALUE
(1 aOul C) I7/ atraf-la hh'
l necif� i/blank) -
a. LONG TERM
a
(r) Mwss fIl (1) Mws.
NC CONCENII.wiION CUNCENTRwlIUN
V. NO. OF a.CO NCEb. NO OI
ONCIEN-
ANALYSES T N b. MASS II) (z) Mwss ANALVSE7
CONCENtRwT10N
a Biochemical
Oxygen Demand
• 3
94
1
mg/1
lb/day
3.4
31
1
(HOD)
b. Chemical
Oxygen Demand
(COD)
8.5
241
1
mg/1
lb/day
5.8
53
1
c. Total Organic
Carbon (TOC)
2.4
68
12.0
341
5.5
157
1
24
mg/.1
mg/1
lb/day
lb/day
1.9
7
17
64
1
1
d. Total Suspended
Solids (TSS)
14.3 406
c .05 c 1.42
VALUE
e. Ammonia (as N)
1
mg/1
lb/day
.05
.46
1
VALUE
VALUE
VALUE
f F low
3.4
VALUE
1.7
1.1
52
MGD
1. 1
VALUE
52
g. Ternperatu 1a
VALUE
VALUE
(wit fer)
NA
VALUE
°C
h. Temperature
VALUE
VALUE
VALUE
tsurnnler)
NA
MINIMUM MAXIMUM
MINIMUM
°C
nH
6.4 9.0
6.4 8.4
�C_,__
_
257
STANDARD UNITS
PART B - Mark "X" in column 2-a for each pollutant you know or have reason to believe is present. Mark "•X" in column 2-b for each pollutant you believe to be absent. If you mark column 2a for any pollutant
which is limited either directly, or indirectly but expressly, in an effluent limitations guideline, you must provide
the results of at least one analysis for that pollutant For other pollutants for whicti you mar►
column 2a, you must provide quantitative data or an explanation of their presence in your discharge. Complete one table for each outfall. Seethe instructions for additional details and requirements
t. POLLUT-
2. MARK 'X•
-_ _ _ _ 3. EFFLUENT
4. UNITS
5. INTAKE foplional)
ANT AND
CAS NO,
a
uEVE
b. ec-
UEV EI
W.
8. MAXIMUM DAILY VALUE
b. MAXIMUM 30 DAV VALUE
(1 avala e/
e.LONG T�ftM �j �(p
(If alrarrable
VALUE
11. No.O
a LONCEN
a LONG TERM
AVERAGE VALUE
NO. Or
L )
(t/auailablC
rw E•
LENT
wls-
5ErIT
ANAL-
USES
- RATION
h. MASS
ANAL
(I)
CONCENTRATION
12) MAss
111
CONCENTRATION
I=l MASS
(l
CONCENTRATION
12)
Mwii
1
CONCLNTH wT1ON
f=1 MA55
a. Bromide
(24959-67-9)
X
.2
c 6
-1
m /]-
lb/day
c. 2
c 2
1
b Chlorine,
Total Residual
X
O
_
O
_
1
Mg/1
lb/day
0
0
1
c. Color
X
10
X
1
Units
X
10
X
1
d. Fecal
Colonie
Coliform
X
17
X
--
----
1
X
49
--
X
1
-
100 ml
---
to. Fluoride
(16984-48-8)
X
.1.5
4
1
Mg/1
lb/d-mr
.10
.92
1
I. Nitrate -
Nitrite (as N))
X
c .05
c 1
1
mg/1
lb/day
.059
.54
1
,EPA Forrl 3510 2C (Rev 2-85) PAGE V-1 CONTINUE ON REVERSE

ITEM V43 CONTINUED FROM FRnruT
1. POLLUT-
Z. MARK 'X'
3. EFFLUENT
4. UNITS
5. INTAKE (uprionar)
ANT AND
CASN0.
b. MAXIM M 3 ^Y VALUE C.LONG T FM A p VALUE
8. MAXIMUM DAILY VALUE 9 8l/ Il �l �' d. No OF
1 tlU0ltl ¢ aUtl O ¢
a. •c-
vw�
Ii. NI
it wvReu
8. CONCEN-
8. LONG
AVERAaGs
TERM
Ee VV ALOE
, NO OI
�II tlUtllltl1�11¢)
•a NT
Sl NT
TRATION
b. MA55
ANAL
YSES
ONt 111 TION
-
1�1 MwSa
CUNt ENTNw iION
(_) MASY
CONCENTRATION
(2) MASS
ANAL-
YSES
OONCI NTRATION
1�) MASS
g. Nitrogen,
Total Organic
(as N).
R
.52
15
-
-
1
mg/1
lb/day
.30
3
1
It. Otl and
Gree e
X
.7
20
.4
11
24
mg/1
lb/day
c .1
c . 92
1
i. Phosphorus
-
(as P), Total
(7723.14-0)
X
-
----
.045
-- - --
1
--
1
mg/1
lb/day
.069
.63
1
1• Radioactivity
--
--
-
--
(1) Alpha,
Total
X
--
-- - -
C .4
----- -
X
-
-------- --
----
1
pCi/1
X
-
.4+.2
-
X
--
1
- -
121 Beta.
--
--
Total
X
-
-
2.9+.5
---------
X
--
----
1
pCi/1
X
1.8+.4
X
1
Radium,
--
------
--
To
Total
X
--
- -
C 1.6
--
X
-
-------
-
----- -
1
pCi/1
-----
X
---
C 1.5
--------
X
--
1 i
- - t
141 Radium
--
226, Total
X
.15+. 03
X
1
pCi /1
X
. 07+. 02
X
1
k. Sulfate
(as S0 4)
x
34
965
1
m /1
g
lb/day
y
7.8
72
1
(14808-79-8)
1. Sulfide
(a.$)
X
--
118.2
3354
- --
1
mg/1
lb/day
1.2
11
1
m. Sulfite
14265 45-3)
X
X
--.
c 2
c . 01
-
c 57
c .28
_..
_
-- -- --- - - -
- ---- - --
1
1
mg/1
mg/1
lb/day
lb/day
c 2
c . 01
c 18
C .09
1
1
_
n. Surfactents
-
o. Aluminum,
Total
(7429-90-5)
X
c. 3
c 9
1
mg/1
lb/day
c. 3
C 3
1
-
- -
P. Barium,
Total 39-3)
X
. 10
3
1
mg/1
lb/day
C .01
C .09
1
-.
-
q. Boron,
7"0-42-8)
X
.08
2
1
mg/1
lb/day
c .05
c. 5
1
►. Cobalt,
Total
(7"0.48-4)
X
c .1
c 3
-._. __ ___ -
------------
-- --- -
1
mg/1
lb/day
c .1
c .92
1
s. Iron, Total
---
- -
--
-
-------
- --
(7439.89-6)
X
.26
- - --
7
-- --- -
-- -- --
1
mg/1
lb/day
.30
3
1
t. Magnesium,
---- -
-
-
-- ---
- .-
Total
(7439-95-4)
X
2.1
56
- -
1
mg/1
lb/day
1.4
13
1
u. Molybdenum,
-
-
Total
17439-98.7)
X
c .02
C• 57
1
mg/1
lb/day
c .02
c .18
1
v. Manganese.
----
--
- ---
- -
-
Total
(7439.96-5)
X
--
.075
---
2
----- ----
-
1
mg/1
lb/day
.059
.54
1
--
w. Tin. Total
-
-
-
(7440.31-5)
X
c. 5
c 14
1
mg/1
lb/day
c .5
c 5
1
--- -- --
1
X. Titanium,
Total
(7440-32.6)
X
c .006
c .17
1
mg/1
lb/day
c .006
c .06
1RL-t
ti-A corm 3o7U-wu (Nev. 1-85) PAGE'V-2 CONTINUE ON PAGE V .1

EPA I.D. NUMBER (Copy from Item I of Form I)
OUTFALL NUMBER
Form Approved
NC 0004961
002
Ash Basis OMB Na 2
Approval exppiresines o 7.31 -88
CONTINUED FROM PAGE 3 OF FORM 2•C
PART C - If you are a primary industry and this outfall contains process wastewater, refer to Table 2c-2 In the Instructions to determine which of the GC/MS fractions you must test for. Mark "X" in column
2-a for all such GC/MS fractions that apply to your industry and for ALL toxic metals, cyanides, and total phenols. If you are not required to mark column 2-a (secondary industries, nonprocess
wastewater outfalls, and nonrequired GC/MS fractions), mark "X" In column 2-b for each pollutant you know or have reason to believe Is present Mark "X" In column 2-c for each pollutant you
believe Is absent If you mark column 2a for any pollutant, you must provide the results of at least one analysis for that pollutant. If you mark column 2b for any pollutant, you must provide the results
of at least one analysis for that pollutant if you know or have reason to believe it will be discharged in concentrations of 10 ppb or greater If you mark column 2b for acrolem, acrylonitrile, 2,4
dinitrophenol, or 2-methyl-4, 6 dlnitrophenol, you must provide the results of at least one analysis for each of these pollutants which you know or have reason to believe that you discharge in
concentrations of 100ppb or greater. Otherwise, for pollutants for which you mark column 2b, you must either submit at least one analysis or briefly describe the reasons the pollutant Is expected to
be discharged. Note that there are 7 pages to this part. please review each carefully. Complete one table (all7 pages) for each outfall. See instructions for additional details and requirements
1. POLLUTANT
2. MARK •x•
3. EFFLUENT
4. UNITS
5. INTAKE (uptinna))
AND CAS
NUMBER
attar
- -
h. nt-
ut-
--
a. MAXIMUM DAILY VALUE
b. MAXIM M 3.0 pAY VALUE
I ouotiobie)
C.LONG T M
I aUal
��
AVRG VALUE
-{ 6[ /
a e
11 NO.OF
a. CONCEN-
a. LONG
TERM
VALUE
b. No c
(i/eoailable
N� IL
iak-
OUIH-
tve
oHt
SF NT
'c
love
wN-
4t NT
- --- -
111 (a) MASS
CONLt NTRATION
ANAL-
YSES
TRATION
MASS
ANAI
YSL'
(')
CONCt NTH ATION
(a) MASS
(�)
CUNCt NTNATIUN
(a) MAfS
1 coraeeN-
( )
TNATIOM
ta) MAf5
METALS, CYANIDE, AND TOTAL PHENOLS
-_
1 M. Antimony,
Total (7440.36 0)
X
X
X
X
c. 6
129
.002
c .004
c 17
1
mg/1
lb/day
c. 6
c 6
1
1
1
1
2M. Arsenic, Total
(7440-382)
4
.06
c .11
1
1
1
Ug/1
mg/1
mg/1
lb/day
1.1
.01
3M. Beryllium,
Total, 7440 41 7)
lb/day
lb/day
.001
.01
4M. Cadmium,
Total (7440 43 9)
C .004
c .04
SM Chrorniurn,
Total (7440 47 3)
X
c .03
c .85
1
mg/1
lb/day
c .03
c .28
1
6M Copper, Total
(7440-5081
X
c .03
c .85
1
mg/1
lb/day
c .03
c .28
1
7M Lead, Total
(7439.92-1)
X
c 2
c .06
1
tip/1
lb/day
c 2
c .02
1
8M. Mercury, Total
(7439 97-6)
g
C, 1
0
1
11 1
lb/day
c .1
0
1
9M. Nickel, Total
(7440 02 0)
X
X
c .04
c 2
c 1
c .06
1
1
mg/1
_1
lb/day
lb/day
c .04
c 2
c. 37
c .02
1
1
IOM. Selenium,
Total (7782 49 2)
I IM. Silver, Total
(/440-22.4)
X
X
X
c .04
c. 5
.014
c 1
c 14
.40
1
mg/1
lb/day
c .04
a .37
1
1
1
12M. Thallium,
Total (7440 28 0)
1
1
mg/1
mg/1
lb/day
lb/day
c. 5
.02
c 5
13M Zinc, Total
( 7440 66 6)
.18
14M Cyanide,
Ioral1571251
X
c .01
c .28
1
mg/1
lb/day
c .01
c .09
1
TdialSol Phens,
X
c .005
c .14
1
m8/1
lb/day
c .005
c .05
1
DIOXIN
2 9 7,8 Teltir - X DESCRIBE RESULTS ---- ---- -- - -----
1ldol6dlbenao P
I
r)lox in(1764016� NOT DETECTED
EPA Form 3510-2C (Rev. 2 851 PAGE- V-3 CONTINUE ON REVERSE

CONTINUED FROM THE FRONT
t. POLLUTANT 2. MARK •X•
AND CAjS --- -
"---'"- -
_ 3.
EFFLUENT
4. UNITS
5. INTAKE
(t/ptiotllll)
b, MP.XIM- M
1 OVeI
30 pAV-VALUE
Y Dl
a el
_
C.LONG T M
1 eVet
�
tl. NU OF
a. CONCEN
a LONG
TERM
VALUE
b NO 1
NUMBERMAXIMUM
16EN1
DAILY VALUE
VALUE
11 ('
�AF,?-
(i(, ellellllf)lt') ti 1NI1N fl Nl (1)
_ lam_ lt)N1 NrItA t1UN
ANAL-
USES
TRATION
I.J.MASS
ANAI
Y$Et
(!) MAlS
- -- _-
(1)
CUNCl NrN AiIUN
I/) MhSS
__
(1)
.UhC CNTNAl1UN
([) MASS
(1) c..cCN-
TNATION
(2) NAff
G_CAii FRACTION - VOLATILE COMPOUNDS
- -
---- --- ----
IV Acralein�
----
(107-02-8)
X
X
X
c 15
c 5
c 5
c .43
c .14
c .14
-
-
- - -
---- - --
- - -
_ - --
1
-----
1
--
ug/1
lb/day
c 15
c.14
2V. Acrylonitrile
1107 13-1)
ug/1
-
lb/day
c5
c.05
3V. Benzene
(71 43.2)
1
ug/l
lb/day
c 5
c.05
-
_ _
4V. Bif (Chloro-
lb/day
----
c50
c .46
Inrlhyl) Ether
154288 1)
X
X
c 50
c 5
c 1.42
c .14
--- -
-
1
----
1
ug/1
-
ug/1
5V. Brornoform
(75 25-2)
lb/day
c 5
c .05
-
6V. Carbon
------ ---
c 5
a .05
Tetrachloride
(56 23-5)
X
c 5
c .14
1
ug/1
lb/day
7V. Chlorobenzene
---- -
(10890-7)
X
c 6
C .17
-
1
u9/1
lb/day
"1 6
c .06
8V. Chlorodi-
-
c 5
c.05
1ethane
(12412a 48- a8-1)
X
c 5
c .14
--
- -
1
�_
ug/_
lb/day
-
9V. Chloroethane
-
(75 00.3)
X
-
c 5
c .14
- -- -
1
ug/1
lb/day
c 5
-,.05
1- V.-Chloro-
c10
c.09
ethylvinyl Ether
(110-75.8)
X
c 10
c .2$
1
ug/1
lb/day
i 1 IV. Chloroform
(67-66-3)
X
-
---
----
c 5
c .14
- - -
- - - "-
1
ug/?.
lb/day
c 5
c .05
12V. Dichloro-
lb/day
c 5
c .05
brwnomethane
(5-27-4) 7
-
X
- -
- -
- -
c 5
-
c .14
- -
- -'
--- - --
1 -
ug/.l
13V. Dichloro-
up/].
- --
lb/day
c 35
c . 32
difluoromethene
(75-71-8)
X
c 35
c .99
1
- - -
_
14V. 1,1-Dichloro
c. 05
-
ethane (75-34-3)
X.
c 5
.14
-
- - --
---
1
ug/1
lb/day
c 5
15V. 1,2-Dichloro-
-
--- -
-- - -
- --
-----
ethane (107-06-2)
X
c 5
c .14
1
ug/1
lb/day
c 5
c. 05
16V. 1,1-Dichloro
-
---
-`
- -
----`--
ethylene (75-36-4)
X
c rj
a .14
1
ug/Y
lb/day
c 5
c. 05
17V. 1,2 Dichloro
propene (78 87 5)
X
c 5
c .14
1
ug/1
lb/day
c 5
c .OS
18V 1,3-Dichloro•
--
propylene (542-76-6)
X
-
c 5
c .14
1
u_{_;/1
lb/day
c 5
c .05
19V. E thylbenzene
-
1100-41.4)
X
c 7, 2
c, 20
1
uo/1
lb/day
c 7.2
c. 07
20V. Methyl
llromide (74-83 9)
X
c 10
c .28
1
ug/1
lb/day
c 10
c .09
2 1 V Methyl
----
-
---"
Chloride (7487 3)
X
c 10
e , 28
1
ug/1
lb/day
a 10
c .09
wv.-""I PAGE V-4 CONTINUE ON PAGE V

PA I.D. NUMBER (Copy /rurn /frm / (if Form !)
OEr (FALL NUMBER
OMB No 2040 0086
CONTINUED FROM PAGF V 4
NC 0004961
002
Ash Basin Q/+/'rovr/rxprres 7 31 8B
1. POLLUTANT 2 MARK x
AND CAS -
.Ra 1.rte.
NUMBERJI"..",
jT1,.vt LI. V al
- - -- --
MAXIMUM
- --
UAILy VALI/E
3.
--- - ----
b. MAXIMUM
1 ttUOl
EFFLUENT
-- - --
30 pV VALUE
U t')
_
c.LONG T� M1V
t ave
{a. VALUE
f 1d
a+c
4. UNITS
S. INTAKE
(upuun�►/
NO OF
8 LONGTERM
r
E Eb
N(1t
(1)
l'UN�k NTNAIIrN
--_
It) MAlS
-
11)
-
(t) Mt♦bb
e1.111f0611'fuil Ni si Hl
(')
r trrr• 1 NINwrIrrN
ANAL
YSES
a CONCLN.
TRATION
U. MASS
ANA
rSE
I') c-c.N-
(t1
GC/MS FRACTION -- VOLATILE COMPOUNDS
iuuntinul
- -.--
It)
("a+Na lNrNArll)N
-
__
TRATIOh
M,1Y!
22V. Methylene
Chloride (75 09-2) X
c 5
c .14
1
t1g/1
lb/day
c 5
c .05
1
23 V. 1,1,2,2-Tetra-
lb/day
c6.9
c.06
chloroethane (79 34-5) X
---
C 6. 9
----
C . 20
ug/1
1
24V. Tetrachloro-
-
c 5
-,.05
ethylene (127_18_4) X
C S _
c .14
1
Ug/1
lb/day
1
25V. Toluene
-
- -- -
- -
- --
- -- -
--- -
-
c 6
(108883) X
C6
C.17
ug/1
lb/day
c .06
1
V. ,2-Tans-
lb/day
c 5
c .05
__
1
Dichloroethylene X
(156-60.5)
C 5
C . 14
ug/1
---.5
c .05
1
chloroethane X
n1 56-s)
C 5
C . 14
1
ug/1
lb/day
28V. 1,1,2•Tri-
-
-
-
_
- ---
- -
c .05
--
1
chloroethane
179-00-5 ) X
C 5
C . 14
--- -
- -
-
ug/1
lb/day
c 5
----
29V. Trichloro•
- -
-----
- -
-" "--""--
--
ethylene (79-01-6) X
c 5
c .14
1
-
--- --
----'
ug/1
lb/day
c 5
c. 05
1
30V. Trichloro-
-__..
c .05
Iluoromethene X
(75-69-4)
- ___--
C 5
C . 14
1
ug/1
lb/day
c 5
1
31 V. Vinyl
-
--`---
-" -
-
c 10
--
c .09
Chloride (75.01 41 X
c 10
u /1
lb/day
1
GC/MS FRACTION - ACID COMPOUNDS
IA 2 Chloropheno
-
(9557.8)
X
c 10
c .28
---- --
---- ---
1
ug/1
lb/day
c 10
c .09
1
2A. 2,4-Dichloro
-----
----
-
phenol (12083.2)
x
C 10
C
---
- --
.28
- - - - --
- -- -
- - -
-- - -
-
1
lb/day
c 10
c .09
1
- -
3A, 2,4 Dimethyl
-ug�1-
---
-
phenol (105-67.9)
X
c 10----
.28
--_
c
-"------
------_- --
1
u 1
lb/day
c 10---
c
1
- -
4A.4,6-Dinitro-O
--
___
--
.09
Cresol (534-52.1)
;1(
c 50
c 1.4
1
-
u /1
lb/day
-4 50
c .46
1
5A.2,4-Dinitro
-
---
-
I+henol (51-28-5)
j{
c 50
c 1.4
-
1
u l
lb/day
c 50
c .46
1
6A. 2-Nitrophenol
188-75-5)
X
c 10
c .28
1
u l
lb/day
c 10
c .09
1
7A 4-Nitrophenol
-
(10002-7)
:�
c 50-
c 1.4
ug/1
lb/day
c 50
c .46
1
8A. P Chloro M•
--
--
-
Cresol (59-50-7)
%(
C 20
C
-----
.57
-
--
1
1b/day
c 20
-
9A. Pentgchlgro-
-
--u�l -_
----
-
-
I,henol (87 86 5)
x
C 50
u 1
lb/day
c 50
c .46
1
I OA. Phenol
-
- -'
(.108 95•Z) X 10
c .28
_
---
1 1 A 2,4,6 Tri-
-
- -
1
-
�/1
lb/day
---
c 10
c .09
1
Illorophenol X C lU
Hs vs 2) --
C .2$
______..
1
u /1
lb/day
c 10
c .091
1
gilts

CONTINUED FROM THE FRONT
1. POLLUTANT.
AND CAS
NUMBt R
__-_.---
GC/MS FRACTION
!
MAF4K
b e.
I.le v..
._�1
. AEU
'X'
(_ ra
11evl1
-- ---- -
a. MAXIMUM
-
�unl.l nn.wrron
COMPOUNDS
--- ----- - -
DA11-Y VALI1F'
_ -- --
"rwss
i
11• MAXIMUM
(1/ 11UQ1/UG
a unt_'I'Nwllon
LF FLULNT
3,0 DIAY VALUE
1')
-- --—
lel ..w+s
-----
- - -- -- --
C. LONG T�ftM
_ I11 aUnl
-- - � -- -
I`1
- -- - " --
--_- - ---
-- - ---
---- --
Z�RSa VALUE
J Il1'1
--
1 •) wsw+c
-
—
d N(1 OF
ANAL
YSkS
4. UNITS
a CONCEN
TRATION
b MASS
5. INTAFCL
a LOW.
AVENA
(lrpn,nl,l!)
TC RM
VAl!JI
(e) awee
1i N(r .
ANl
YS! •
a n n
IN'•
4I��IN
.._♦V .
•- BASE/NEUTRAL
(1) cuNa:eN
—
LB. Acenaptithene
(83.32-9)
}(
--
-
----
----
28. AcanePhtylene
(208-96-8)
�(
--- - -
----
--
- .
3B. Anthrocene
-
—
(120-12.7)
(92-87-5)
---
- -
-- -
-
58. Benzo (a)
---
- - --
---
Anthracene
(56-55.3)
66. Benzo (a)
- --
Pyrene (50-32-8)
X
- -
- -
----
-------
----- �
-
78. -Benzo-
---
fluoranthene
(205 99-2)
is
--
Be. Benzo (phi)
--- ---
-
Perylene
(191.24-2)
- --
---
-
- -
- -
-- --- -
98. Benzo (k)
Fluoranthene
(207-08-9)
X
-
-
B. Bls (2-C Toro----------
ethoxy) Methane—
(111.91-1)
--- -
(•lhyl) Ether
1111-44-4)
X
128 Bis(2-Ch/orolso-
--
-- -
".---
--
---
-- - - -
-- ----
--
-
oropt/)Ether(102.80-1)
�(
-
_
. -
-- --
13B. Bis (2-E(hy1-
--
hexyl) Phthalate
(117-81-7)
X
- - -
-- --
--
-
148. 4-Bromo•
phenylPhonyl
Ether (101-55-3)
X
-
-
- ---
- -- -
--
--- - ---
-----
----
158. Butyl Benzyl
Phthalate (85-68-7
X
--
B. oro-
naphthalene
(91-58.7)
X
-------
----
178.4-Chloro-
- ---
---
-
phenyl Phenyl
Ether (7005-72-3)
X
---- - - -
-- - ---
18B. Chrysena
----
----
- — -
----
(218 01.9)
X
--
-- --
-----
---
----
19B. Dibenzo (a.h)
--
--
-- --
--
Anthrecene
(53.70-3)
X
---
--
208. 1,2-Dichloro•
--
--
--- --
-
-
benzene (95-50.1)
X
21 B. 1,3-Dichloro•
benzene (541-73-1
X
r PA
in-
12 Oct
PAGE V-6 CONTINUE ON PAGE V

EPA I.D. NUMBER (copy from Item I o/FOrn I)
UTFALL NUMBER
OMB No 240-0086
No 040
CONTINUED FROM PAGE V-6 NC 0004961
r002
Ash Basin Approval expires 7 31 88
I.POLLUTANT
2. MARK x
3.
EFFLUENT
4. UNITS
5. INTAKE
(oloriunal)
AND CAS
NUMBER
DAV VALUE
,1 bl e
c.LONG T M
_ 1 ava10
�`�
A�[R VALUE
-` p/ e
d. NQOF
a LONG
A'
—
TERM
an fr
b. •r.-
c ec-
a. MAXIMUM DAILY VALUE
b. MAXIM M !O
( aUala
-
b NO �
(l/ovailable)
_
aaiiw
nor
ienr
of of
fi �r
1�1 trl Mwss
COMPOUNDS (conlinued.
-- -----
USES
aANAL. RATION-
TRATION
L. MASS
ANAI
rS E S
I� )
-------
Irl +rw„
- --
(1
---_------
Ir{ r+ws,
(�) co«cEN
Ir) MAff
GC/MS FRACTION - BASE/NEUTRAL
226. 1,4-Dichtoro-
benzene(106-46.7
X
238. 3,7•Oichloro
benzidine
X
(91-94.1)
248. Diethyl
Phthalate
X
(84-66-2)
-
-
----
- --- -
- - --
258. D{methyl
Phthalate
X
1131-11-31
-
- - -
------
-—
----
268. Di-N-Butyl
Phthalate
X
(84-74-2)
toluene (121-14-2)
X
28B. 2,6-Dinitro-
toluene (606-20-2)
X
298. Di-N-Octyl
Phthalate
X
(117,84-0)
308. 1,2-Diphenyl-
hydrazine (as Azo-
X
benzene)(122-66-7
31B. Fluorenthene
(206-44-0)
X
---
-- -----
----
---
32B. Fluorene
---
-
(86-73-7)
X
- -
338.Hexacnlorobenzeno
(110-74.11
X
348. Hexa-
chlorobuted{ene
X
(87-66.3)
-
-- - ----
- -
-
-
35B. Hexachloro-
--
--
cyclopentadiene
X
(77-47-4)
368. Hexachloro-
-
ethane (67-72-1)
X
378. I rtdeno
-
—
(I,2,3-cd) Pyrene
X
(193-39-5 )
38B. I sophorone
(78.59-1)
X
39B. Naphthalene
(91-20.3)
X
--
---------
- -----
-
408. Nitrobalnzene
X
---
-----
-
- —
---
(9P-95-3)
--
-
- -
-- -
-
- --
41.8. N-Nitro
----
-
--
--
-
sodimethytamine
X
(62-75-9) -
-- --
--
— ---
-` --
42B.'N-Nitrosodi-
- —
-
—'
N P16pylamine
X
(10 1 64 7)`

CONTINUO FROM THE FRONT
I. POLLUTANT 2. MARK 'X' — — 3_EFFLUENT _
AND Cas -- --- -- -
NUMBER e i " b •t �'t a. MAXIMUM DAILY VALUE b. MAXIM}JM 30 PAY VALUE c.LONG T ,PM AV�G VALUE
tlt aVU/ 'able) f aUUI a C)
we- wNt• Ate- - __.. .- - --- --_--- -_ _ _- d. NO OF
11faVaflab111 ou)w ee Ni ceNr 1'I T ANAL
I'1 (�) wAss c.IN1.t H1I)nw nun "r wac YSES
_ _ f UNl l NillAIIUNI CONIC NiNA11UN ---- l 1
GC/MS FRACTION — BASE/NEUTRAL COMPOUNDS (continued)
4. UNITS
5 INTAKE (uptiottall
a CONCEN-
TRATION
b. MASS
a LONG TERM
-
I) NO 111
ANAI
YSES
CONCt N-
(11 0N
IN Ai1
111 wwcc
438. N-!Jitro-
-
sodiphenylamine
(86.30=6)
}(
- - - -- -
-- - -
-- - -- - - --
- - -- - ---
--- - ---
--- --
448. Phenanthrene
(85.01-8)
X
X
45B. Pyrone
(129-00-0)
468. 1,2,4 - Tri-
chlo►obenzene
(120-82-1)
X
GC/MS FRACTION — PESTICIDES
1P. Aldrin
(309-00-2)
X
2P. Q-BHC
-
(319 -84-6)
x
3P. Q-BHC
(319-85-7)
x
--
4P. •r-BHC
158-89-9►
)(
5P, b-BHC
(319-86-8)
u
6P. Chlordane
--
(57 74.9)
i(
-----
---
-
7P.4,4'-DDT
(50-29-3)
}�
-
8P. 4,4'-DDE
(72.55-9)
X
-- —
9P. 4,4'-ODD
(72 54-8)
X
----- --
----- -" ---
--
—
l OP. Dieldrin
—
---
(60 57-1)
�(
- — --
-------
----
---
--
11P. Q-Endosulfan
---
-
-----
—
1115 29 7)
X
(1 15 -29-7)
X
--
--
-- --------
--
13P. Endosulfan-
1 1031-07-8)
X
14P, Endrin
112 208)
15P Endrin
111Jehyde
X
1421-93 4)
16P lieptachlor
16448)
X
--
-- ---
--
— --
-- •- -�- ....f r^t Q v-a CONTINUE ON PAGE V 9

CUNTINUED FROM PAGt V-8
EPA I.D. NUMBER (Copy from Item I of Form 1)
NC 0004961
Farit) Approved
OUTFALL NUMBER l OMB No 20400086
002 I Ash Basin Apptnval erptres 7 31 88
I.POLLUTANT ! MARK'X'
AND CAS -- — ----
1i
NUMBER a,;,'r rlr�wr olaiver
(t/oarulnhh'► u�riN le Nr Ill lk Ni
_
GC FRACTION - PESTICIDES (continued)
--
- - ---
a. MAXIMUM
—I�'
co n�Nwrn.,.
--
-.. - -- -
DAILY VALUE
Itl
-- --- --
3
b. MAXIM M 3
(1 atrat�a6/¢I
1')
--- -- --
EFFLUCNT
Y VALUE
r was
( ) •+
IC.LONG T�jiM
_(l/atrallabh'/_
IrI
a0—
- --- - -
A�[��a VALUE
_.
() •w
-- ---
d. NO Oi
ANAL
YSI S
4.UNIrs
b CONCEN
TRATION
5.INTAKE
rNlotfull
Ir I
_
b Nar
ANr
—
b. MASS
a Lc)Nc,
A
TERM
E VALUE
(rl <oNa-rN-
17P. Heptachlor
Epoxide
(1024-57-3)
is
X
X
X
18P. PCB-1242
(53469-21-9 )
19P. PCB-1254
(11097-69-1)
20P. PCB-1221
(11104-28.2)
21P. PCB-1232
(11141-16.5)
X
22P. PCB•1248
(12672-29-6)
X
23P. PCB-1260
(11094-82-5)
X
g
24P. PCB-1016
(12674-11-2 )
25P.Toxephene
(8001-35-2)
x
PAGE V-9

A schematic flow diagram of water use, treatment provided, recycle
accomplished, and discharges indicating rates of flow for individual wastes
streams is attached. A brief discussion of the individual waste streams
follows:
1. Boiler Blowdown: The blowdown from the boilers at Riverbend Steam Station
is allowed to flash in a blowdown tank. The condensate is drained to the
boiler room sumps. Boilers #7 and #8 blowdown at an average rate of 600
lbs. of steam per hour. Boilers #9 and #10 blowdown at an average rate of
1000 lbs. of steam per hour. The combined condensate condensate flow from
blowdown amounts to an average of approximately 0.005 MGD. This flow is
routed to the ash basin. The waste steam is vented to the atmosphere.
2. Floor Drains: The waste water which enters the floor drains at Riverbend
is accumulated in either the boiler room sumps or the turbine room sumps.
Waste water which flows to the boiler room sumps originates from the
following sources:
1. Floor wash water,
2. Boiler blowdown,
3. Waste water from demineralizer regeneration,
4. Equipment cooling water,
5. Turbine room sump overflow,
6. Sealing water and
7. Miscellaneous leakages.
The effluents from #7 and #10 boiler room sumps are pumped to the ash
basin.
The turbine room sumps accommodate waste water flow from such sources as:
1. Floor wash water,
2. Condensate-feedwater system leakage,
3. Equipment cooling water and
4. Other miscellaneous flows.
The effluents from the turbine room sumps are pumped to the yard drain
sump and then to the ash basin.
Boilers #1-#6 have been retired. Therefore, the floor drains receive no
waste water from these units. However they do receive filter backwash
water and reactor desludge water from the filtered water system. These
wastes go to the pit sump and are then pumped to the ash basin.
3. Chemical Cleaning of Boilers: Boilers #7,#8 #9 and #10 at Riverbend
Steam Station are chemically cleaned on a3 year schedule. (Boilers #146
are retired). The volume of the boilers determines the quantity of
chemicals required for a cleaning. Boilers #7 and #8 each have a
water -side volume of 26,300 gallons. The volume of #9 and #10 boilers is
24,900 gallons each. The volume of dilute waste chemicals discharged from
#7 or #8 boilers during a chemical cleaning is 289,300 gallons. The
volume of dilute waste chemicals drained from #9 or #10 amounts to 273,900
gallons. These wastes are drained through temporary piping to the
permanent ash removal links which flow to the ash basin. Immediately
RB-PAGE 2

prior to the beginning of a boiler chemical cleaning procedure, additional
blocks are added to the ash basin discharge structure. This assures
longer retention time of the chemical wastes for proper treatment through
dilution, neutralization, precipitation, and ion -exchange as documented in
the Ash Basin Equivalency Demonstration (October 1976). A list of
chemicals and amounts required to clean the boilers at Riverbend follows.
Chemical
Sodium Bromate
Ammonium Carbonate
Ammonium Hydroxide (260Be)
Hydrochloric Acid (31.5%)
Ammonium Bifluoride
Copper Complexer
Sodium Carbonate
Citric Acid
Boiler #7 or #8
550 lbs.
1000 lbs.
900 gals.
4800 gals.
1500 lbs.
1660 lbs.
3000 lbs.
300 lbs.
Amount
Boiler #9 or #10
550 lbs.
1000 lbs.
850 gals.
3400 gals.
1050 lbs.
1650 lbs.
2200 lbs.
200 lbs.
4. Coal Pile Drainage: The coal pile at Riverbend Steam Station covers an
area of approximately 12.3 acres. The average rainfall run-off is based
on an annual rainfall of 40 inches with 50% run-off. The average runoff
is 0.018 MGD. The coal yard drains to the yard sump and is then pumped to
the ash basin.
5. Ash Basin Overflow: The ash basin at Plant Riverbend accommodates flows
from the yard drainage sump, boiler room sumps, ash removal lines, and
rainfall runoff from the basin watershed area. The average rainfall
runoff are based on forty inches of rain per year with fifty percent
run-off. The average rainfall run-off for the ash basin watershed area is
0.261 MGD. The average flow from the yard drainage sump is 1.224 MGD.
The average flow from the boiler room sumps is 1.490 MGD. The average
flow from the boiler room sumps is 1.490 MGD. The daily ash removal flow
is 2.993 MGD. These flows give a total influent flow to the ash basin of
5.968 MGD.
Due to the construction of the outfall structure, the effluent flow is
essentially equal to the influent flow (refer to the attached schematic of
water flow for further information of individual flows to the ash basin).
6. Oil Storage Run-off: Riverbend Steam Station presently has two oil
storage tanks - one (1) 4,250,000 gal. tank and one (1) 27,000 gal.
underground tank. The 4,250,000 gal. tank is surrounded by an earthen
dike capable of holding the entire contents of the tank. The dike is
drained of rain water with the aid of a siphon arrangement which drains to
the intake. A trap tank is located in the drainage area of the oil tank
as an added precaution.
An oil storage facilities are presently covered under Spill Prevention
Control and Countermeasure Plans.
7. Intake Screen Backwash: The intake screens at Riverbend are backwashed on
an flas needed basis. Normally, the screens require backwashing once per
eight hour shift for a period of approximately 20 minutes. The water
required for backwashing is supplied by a low service pump with a design
RB-PAGE 3

i
capacity of 800 gpm. Therefore, the average volume of water used to
backwash the screens is 0.048 MGD. The maximum needed is 0.960 MGD.
8. Water Treatment Wastes: The water treatment system at Riverbend Steam
Station consists of a clarifier, five gravity filters, two activated
carbon filters, and one set of demineralizers. The sedimentation wastes
collected in the clarifier consists of solids that were suspended in the
service water plus aluminum hydroxide precipitate formed as a result of
adding aluminum sulfate and sodium hydroxide. The average volume of water
required for desludging the clarifier is approximately 0.002 MGD. These
sedimentation wastes are drained to a floor drain which flows to the old
end pit sump where they are pumped to the ash basin.
There are five gravity filters which follow the clarifier in the water
treatment process. One of these filters is backwashed per day.
Approximately 15,000 gallons of backwash water are required to backwash
each filter. This water flows to the old end pit sump and is pumped to
the ash basin.
In addition to these gravity filters, there are two activated carbon
filters. These filters are backwashed once every three or four months.
The volume of water required to backwash one of these filters is 2,000
gallons. This backwash flows to the #6 and #7 turbine room sump and is
pumped to the ash basin.
The set of demineralizers at Riverbend consists of two mixed -bed cells.
Normal plant operation requires that only one cell from the set operate at
any one time. Each cell has a capacity of 120 gpm.
Each cell is regenerated approximately once per week. A regeneration
requires 267 pounds of 66°Be sulfuric acid and 784 pounds of 50% sodium
hydroxide. An average dilute waste chemical and rinse flow is 0.004 MGD.
The dilute acid and caustic are discharged from the cell simultaneously
through the same header for neutralization purposes. The regeneration
wastes flow to the #9 and #10 boiler room sump where it is then pumped to
the ash basin.
9. Effluents from Air Pollution Control Devices: Riverbend utilizes electro-
static precipitators as its air pollution control devices. The fly ash
captured in these precipitators is water -sluiced to the ash basin.
Approximately 1.976 MGD are required for this purpose.
10. Sanitary Wastes: The sanitary wastes from the plant are treated by a
septic tank. The sanitary effluent is pumped from the discharge chamber
of the septic tank to the ash basin via the yard drainage sump. The load
on this unit is produced by a minimum of 109 people on one shift. Based
on annual data the average daily flow is 0.006 MGD.
11. Condenser Cooling Water: The condensers at Riverbend Steam Station are
cleaned mechanically. Periodically, rubber plugs are forced through the
tubes to rid them of scale or other deposits.
Each unit at Riverbend has two condenser cooling pumps. The capacities of
these pumps are listed below. The normal plant policy is to operate both
RB-PAGE 4

CCW pumps on each unit at all times the unit is carrying load. This
practice leads to a higher reliability factor for the units.
CONDENSER COOLING WATER PUMP CAPACITY
Unit No. 1-Pump GPM 2-Pump GPM
4 45,000 67,000
5 45,000 67,000
6 50,000 77,000
7 50,000 77,000
Maximum Cooling Water Flow 288,000 GPM
RB-PAGE 5

B
Condenser
Cooling
Water
C Intake
Screen
Baekwash
Water Treat-
, ment
' System
ii
I
E
Misc.
41. Equipment
Cooling
F I Fly Ash
Sluicing
G Bottom
Ash
Sluicing
K Sanitary
Waste
System
Pit Sump
H
L
Bo er
I Room
Sumps
J 0 R
N Condensate
Feedwater T
System 1
0
Coal Yard ,
Drainage
tormvate (Stormwater (2) Stormvater (3)
Yard V Ash
Drainage Basin
Sump
S
_______- U
Turbine
Room
Sumps
SCHEMATIC OF WATER FLOW
PLANT RIVERBEND
COUNTY: GASTON STATE: N. C.
February, 1989
1 001
002
IT.;
w
Ow
�1
g2 3

LEGEND
Plant Riverbend Schematic
Flnw Ctrnnm
1. Yard Drainage
2. Coal Yard Drainage
3. Ash Basin Rainfall Runoff
A. Plant Intake
B. Condenser Cooling Water
C. Intake Screen Backwash
D. Water Treatment System
E. Misc. Equipment Cooling
F. Fly Ash Sluicing
G. Bottom Ash Sluicing
H. Fan Floor Cooling
I. Misc. Equipment Cooling, Seals and Leakage
J. Miscellaneous Flow
K. Sanitary Waste System
L. Filter Backwash and Desludge
M. Demineralizer Regeneration Waste Water
N. Boiler Feedwater
0. Boiler Blowdown
P. Transformer Cooling Water
(through oil trap tank)
Q. Combustion Turbine Cooling Water
(through oil trap tank)
R. Evaporative Losses, Soot Blowing
S. Boiler Room Sumps
T. Losses to Floor Drains From Condensate Feedwater
System
U. Turbine Room Sumps
V. Yard Drainage Sump
001. Condenser Cooling Water Discharge
002. Ash Basin Discharge
Avg. Daily Flow, MGD*
0.004
0.018
0.261
260.119
252.756
0.048
1.186
3.136
1.976
1.017
0.188
1.464
0.925
0.006
0.017
0.004
1.162
0.005
0.453
0.106
1.113
1.490
0.044
1.014
1.224
252.804
5.968
*Flows are extrapolated beyond the scope of significant figures
in this table and throughout this narrative to account for
variations in flow capacities.
RB-PAGE 7

PART D
The following tabulation lists the hazardous substances located on site in
accordance with 40 C.F.R. 117.12 and with the legislative/regulatory history to
qualify for a §311 exclusion under the Clean Water Act.
RB-PAGE 8

LIST OF
HAZARDOUS SUBSTANCES (SECTION 311)
RIVERBEND STEAM STATION
POLLUTANT
UANTITY*
SOURCE
Acetic acid
9
gal.
Lab
Aluminum sulfate
3000
lbs.
WTA (1)
Ammonimum hydroxide
6
gal.
Lab
Hydrochloric acid
6
gal.
Lab
Nitric acid
1
gal.
Lab
Phosphoric acid
4
gal.
Lab
Potassium hydroxide
5
lbs.
Lab
Sodium bisulfite
8.8
lbs.
Lab
Sodium hydroxide
4600
lbs.
DR (2)
Sodium hydroxide
2
lbs.
Lab
Sodium phosphate (tribasic)
2000
lbs.
Cleaning
Sulfuric acid
4000
lbs.
DR
Sulfuric acid
4
gal.
Lab
DERIVATIVES OF LISTED HAZARDOUS CHEMICALS
Ammonium bifluoride
1.1
lb.
Lab
Chlorine (liquid)
1200
lbs.
WTA
(150
lb. cylinders)
p-Dimethylamino-benzaldehyde
2.2
lbs.
Lab
Sodium hypochlorite (12.5%)
55
gal.
WTA
Sodium sulfite
11
lbs.
Lab
(1) Water Treatment Area
(2) Demineralizer Regenerate
*Valves represent maximum quantities onsite and do not necessarily
reflect quantities discharged. Treatment of these and other chemical
substances to achieved by the ash basin. Refer to Item 3 of "NPDES
Supplemental Information" for a list of chemicals and amounts used
for boiler cleaning.
RB-PAGE 9

Riverbend Steam Station 316(a) Determination
Duke Power Company's operating experience during the past five years under the
thermal limitations imposed in NPDES Permit No. NC0004961 substantiates EPA's
316(a) determination (May 1975) for Riverbend 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."
In Duke's judgement the operating characteristics of the station have a minimal
effect on the aquatic environment of Mountain Island Lake. Accordingly, Duke
requests that the thermal limitations imposed in the permit be continued.
RB-PAGE 10

NPDES
Supplemental Information
for
Riverbend Steam Station
Date: 2/89

A schematic flow diagram of water use, treatment provided, recycle
accomplished, and discharges indicating rates of flow for individual wastes
streams is attached. A brief discussion of the individual waste streams
follows:
1• Boiler Blowdown: The blowdown from the boilers at Riverbend Steam Station
is allowed to flash in a blowdown tank. The condensate is drained to the
boiler room sumps. Boilers #7 and #8 blowdown at an average rate of 600
lbs. of steam per hour. Boilers #9 and #10 blowdown at an average rate of
1000 lbs. of steam per hour. The combined condensate condensate flow from
blowdown amounts to an average of approximately 0.005 MGD. This flow is
routed to the ash basin. The waste steam is vented to the atmosphere.
2• Floor Drains. The waste water which enters the floor drains at Riverbend
is accumulated in either the boiler room sumps or the turbine room sumps.
Waste water which flows to the boiler room sumps originates from the
following sources:
1• Floor wash water,
2• Boiler blowdown,
3. Waste water from demineralizer regeneration,
4. Equipment cooling water,
5. Turbine room sump overflow,
6• Sealing water and
7. Miscellaneous leakages.
The effluents from #7 and #10 boiler room sumps are pumped to the ash
basin.
The turbine room sumps accommodate waste water flow from such sources as:
1. Floor wash water,
2• Condensate-feedwater system leakage,
3. Equipment cooling water and
4. Other miscellaneous flows.
The effluents from the turbine room sumps are pumped to the yard drain
sump and then to the ash basin.
Boilers #1-#6 have been retired. Therefore, the floor drains receive no
waste water from these units. However they do receive filter backwash
water and reactor desludge water from the filtered water system. These
wastes go to the pit sump and are then pumped to the ash basin.
3. Chemical Cleaning of Boilers: Boilers #7, #8, #9 and #10 at Riverbend
steam Station are chemically cleaned on a 3 year schedule. (Boilers #146
are retired). The volume of the boilers determines the quantity of
chemicals required for a cleaning. Boilers #7 and #8 each have a
water -side volume of 26,300 gallons. The volume of #9 and #10 boilers is
24,900 gallons each. The volume of dilute waste chemicals discharged from
#7 or #8 boilers during a chemical cleaning is 289,300 gallons. The
volume of dilute waste chemicals drained from #9 or #10 amounts to 273,900
gallons. These wastes are drained through temporary piping to the
permanent ash removal links which flow to the ash basin. Immediately
RB-PAGE 2

prior to the beginning of a boiler chemical cleaning procedure, additional
blocks are added to the ash basin discharge structure. This assures
longer retention time of the chemical wastes for proper treatment through
dilution, neutralization, precipitation, and ion -exchange as documented in
the Ash Basin Equivalency Demonstration (October 1976). A list of
chemicals and amounts required to clean the boilers at Riverbend follows.
Chemical
Sodium Bromate
Ammonium Carbonate
Ammonium Hydroxide (26°Be)
Hydrochloric Acid (31.5%)
Ammonium Bifluoride
Copper Complexer
Sodium Carbonate
Citric Acid
Amount
Boiler
#7 or #8
550
lbs.
1000
lbs.
900
gals.
4800
gals.
1500
lbs.
1660
lbs.
3000
lbs.
300
lbs.
Boiler
#9 or #10
550
lbs.
1000
lbs.
850
gals.
3400
gals.
1050
lbs.
1650
lbs.
2200
lbs.
200
lbs.
4. Coal Pile Drainage: The coal pile at Riverbend Steam Station covers an
area of approximately 12.3 acres. The average rainfall run-off is based
on an annual rainfall of 40 inches with 50% run-off. The average runoff
is 0.018 MGD. The coal yard drains to the yard sump and is then pumped to
the ash basin.
5. Ash Basin Overflow: The ash basin at Plant Riverbend accommodates flows
from the yard drainage sump, boiler room sumps, ash removal lines, and
rainfall runoff from the basin watershed area. The average rainfall
runoff are based on forty inches of rain per year with fifty percent
run-off. The average rainfall run-off for the ash basin watershed area is
0.261 MGD. The average flow from the yard drainage sump is 1.224 MGD-
The—average flow from the boiler room sumps is 1.490 MGD. The average
flow from the boiler room sumps is 1.490 MGD. The daily ash removal flow
is 2.993 MGD. These flows give a total influent flow to the ash basin of
5.968 MGD.
Due to the construction of the outfall structure, the effluent flow is
essentially equal to the influent flow (refer to the attached schematic of
water flow for further information of individual flows to the ash basin).
6. Oil Storage Run-off: Riverbend Steam Station presently has two oil
storage tanks - one (1) 4,250,000 gal. tank and one (1) 27,000 gal.
underground tank. The 4,250,000 gal. tank is surrounded by an earthen
dike capable of holding the entire contents of the tank. The dike is
drained of rain water with the aid of a siphon arrangement which drains to
the intake. A trap tank is located in the drainage area of the oil tank
as an added precaution.
An oil storage facilities are presently covered under Spill Prevention
Control and Countermeasure Plans.
7. Intake Screen Backwash: The intake screens at Riverbend are backwashed on
an as needed basis. Normally, the screens require backwashing once per
eight hour shift fora period of approximately 20 minutes. The water
required for backwashing is supplied by a low service pump with a design
RB-PAGE 3

capacity of 800 gpm. Therefore, the average volume of water used to
backwash the screens is 0.048 MGD. The maximum needed is 0.960 MGD.
8. Water Treatment Wastes: The water treatment system at Riverbend Steam
Station consists of a clarifier, five gravity filters, two activated
carbon filters, and one set of demineralizers. The sedimentation wastes
collected in the clarifier consists of solids that were suspended in the
service water plus aluminum hydroxide precipitate formed as a result of
adding aluminum sulfate and sodium hydroxide. The average volume of water
required for desludging the clarifier is approximately 0.002 MGD. These
sedimentation wastes are drained to a floor drain which flows to the old
end pit sump where they are pumped to the ash basin.
There are five gravity filters which follow the clarifier in the water
treatment process. One of these filters is backwashed per day.
Approximately 15,000 gallons of backwash water are required to backwash
each filter. This water flows to the old end pit sump and is pumped to
the ash basin.
In addition to these gravity filters, there are two activated carbon
filters. These filters are backwashed once every three or four months.
The volume of water required to backwash one of these filters is 2,000
gallons. This backwash flows to the #6 and #7 turbine room sump and is
Pumped to the ash basin.
The set of demineralizers at Riverbend consists of two mixed -bed cells.
Normal plant operation requires that only one cell from the set operate at
any one time. Each cell has a capacity of 120 gpm.
Each cell is regenerated approximately once per week. A regeneration
requires 267 pounds of 66°Be sulfuric acid and 784 pounds of 50% sodium
hydroxide. An average dilute waste chemical and rinse flow is 0.004 MGD.
The dilute acid and caustic are discharged from the cell simultaneously
through the same header for neutralization purposes. The regeneration
wastes flow to the #9 and #10 boiler room sump where it is then pumped to
the ash basin.
9. Effluents from Air Pollution Control Devices: Riverbend utilizes electro-
static precipthese precipititators as its air pollution control devices. The fly ash
captured in ators is water -sluiced to the ash basin.
Approximately 1.976 MGD are required for this purpose.
10. Sanitary Wastes: The sanitary wastes from the plant are treated by a
septic tank. The sanitary effluent is pumped from the discharge chamber
of the septic tank to the ash basin via the yard drainage sump. The load
on this unit is produced by a minimum of 109 people on one shift. Based
on annual data the average daily flow is 0.006 MGD.
11. Condenser Cooling Water: The condensers at Riverbend Steam Station are
cleaned mechanically. Periodically, rubber plugs are forced through the
tubes to rid them of scale or other deposits.
Each unit at Riverbend has two condenser cooling pumps. The capacities of
these pumps are listed below. The normal plant policy is to operate both
RB-PAGE 4

CCW pumps on each unit at all times the unit is carrying load. This
practice leads to a higher reliability factor for the units.
CONDENSER COOLING WATER PUMP CAPACITY
Unit No. 1-Pump GPM
—�--- 2-Pump GPM
5 45,000 67 000
6 45,000 67,000
7 50,000 77,000
50,000 77,000
Maximum Cooling Water Flow 288,000 GPM
RB-PAGE 5

A
VCden.er
on
Cooling
Water
C Intake
Screen
Batkwash
Water Treat-
ment
System
E
Misc.
Equipment
cooling
nd Seals
F i Fly Ash
F4 Sluicing
G Bottom
Ash
Sluicing
K Sanitary
Waste
System
L IPit Sump
H
M FRoom
er
I s
J O
N Condensate
Feedwater
System
z
Coal Yard
Drainage
tormwate (1)
Stormwater (2) Stormwater (3)
Yard V Ash
Drainage Basin
Sump
S
T
Turbine
Room
R Sumps
f
T
SCHEMATIC OF WATER FLOW
PLANT RIVERBEND
COUNTY: GASTON STATE: N. C.
February, 1989
002
re
V!

40
LEGEND
Plant Riverbend Schematic
Flow Stream
Avg. Daily Flow, MGD*
1.
Yard Drainage
2.
Coal Yard Drainage
0.004
3.
Ash Basin Rainfall Runoff
0.018
0.261
A.
Plant Intake
B.
Condenser Cooling Water
260.119
C.
Intake Screen Backwash
252.756
D.
Water Treatment System
0.048
E.
Misc. Equipment Cooling
1.186
F.
Fly Ash Sluicing
3.136
G.
Bottom Ash Sluicing
1.976
H.
Fan Floor Cooling
1.017
I.
J.
Misc. Equipment Cooling, Seals and Leakage
Miscellaneous Flow
0188
1.464
K.
Sanitary Waste System
0.925
L.
Filter Backwash and Desludge
0.006
M.
Demineralizer Regeneration Waste Water
0.017
N.
Boiler Feedwater
0.004
0.
Boiler Blowdown
1.162
P.
Transformer Cooling Water
0.005
(through oil trap tank)
0.453
Q.
Combustion Turbine Cooling Water
(through oil trap tank)
0.106
R.
Evaporative Losses, Soot Blowing
S.
Boiler Room Sumps
1.113
T.
Losses to Floor Drains From Condensate Feedwater
System
1.490
0.044
U.
Turbine Room Sumps
V.
Yard Drainage Sump
1.014
1.224
001.
002.
Condenser Cooling Water Discharge
Ash Basin Discharge
25804
..96868
5
*Flows are extrapolated beyond the scope of significant
in this table and throughout this
figures
narrative
variations in flow capacities.
to account for
RB-PAGE 7

a .1
PART D
The following tabulation lists the hazardous substances located on site in
accordance with 40 C.F.R. 117.12 and with the legislative/regulatory history to
qualify for a §311 exclusion under the Clean Water Act.
RB-PAGE 8

6 ., a
LIST OF
HAZARDOUS SUBSTANCES (SECTION 311)
RIVERBEND STEAM STATION
POLLUTANT
Acetic acid
Aluminum sulfate
Ammonimum hydroxide
Hydrochloric acid
Nitric acid
Phosphoric acid
Potassium hydroxide
Sodium bisulfite
Sodium hydroxide
Sodium hydroxide
Sodium phosphate (tribasic)
Sulfuric acid
Sulfuric acid
UANTITY*
9 gal.
3000 lbs.
6 gal.
6 gal.
1 gal.
4 gal.
5 lbs.
8.8 lbs.
4600 lbs.
2 lbs.
2000 lbs.
4000 lbs.
4 gal.
DERIVATIVES OF LISTED HAZARDOUS CHEMICALS
Ammonium bifluoride
1.1
lb.
Chlorine (liquid)
1200
lbs.
p-Dimethylamino-benzaldehyde
(150
2.2
lb. cylinders)
lbs.
Sodium hypochlorite (12.5%)
55
gal.
Sodium sulfite
11
lbs.
(1) Water Treatment Area
(2) Demineralizer Regenerate
SOURCE
Lab
WTA (1)
Lab
Lab
Lab
Lab
Lab
Lab
DR (2)
Lab
Cleaning
DR
Lab
Lab
WTA
Lab
WTA
Lab
*Valves represent maximum quantities onsite and do not necessarily
reflect quantities discharged. Treatment of these and other chemical
substances to achieved by the ash basin. Refer to Item 3 of "NPDES
Supplemental Information" for a list of chemicals and amounts used
for boiler cleaning.
RB-PAGE 9

Riverbend Steam Station 316(a) Determination
Duke Power Company's operating experience during the past five years under the
thermal limitations imposed in NPDES Permit No. NC0004961 substantiates EPA's
316(a) determination (May 1975) for Riverbend 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."
In Duke's judgement the operating characteristics of the station have a minimal
effect on the aquatic environment of Mountain Island Lake. Accordingly, Duke
requests that the thermal limitations imposed in the permit be continued.
RB-PAGE 10

-ft
��►'�� _ 17Arl
1.
State of North Carolina
Department of Natural Resources and Community Development
Division of Environmental Management
512 North Salisbury Street 0 Raleigh, North Carolina 27611
James G. Martin, Governor March 29, 1988 P; C. DEM OF NA R. haul Wilms
S. Thomas Rhodes, Secretary RESOURCBs AND � Director
COMMUNITY JDgV1lM0py.R�
Mr. B. K. Sipe
Duke Power Company
Post.Office Box 33189
Charlotte, NC 28242
Dear Mr. Sipe:
APR 13 1y38
DIVISION OF EPROp WAL 1LqWdM7
MCI 1� 16t� ul"lt.$t ®fFiCE
SUBJECT: Permit Modification
NPDES Permit No. NC0004961
Riverbend Steam Station
Gaston County
The subject permit was issued to you on June 12, 1987. Duke Power adjudicated
the permit based on certain conditions contained in Part III of the permit that
related to groundwater monitoring. During a meeting between the Division and Duke
Power, it was agreed to delete conditions D. S, and T from Part III and to add a
surface water monitoring requirement.
This letter is to provide formal notification that the Division is hereby
modifying the subject permit to delete conditions D, S, and T of Part III and to add
condition V as follows:
V. A study will be completed to further define the assimilative
capacity of the Catawba River for pollutants potentially reaching
the river, and the current impact of the discharge from both
surface and subsurface sources. A study plan will be submitted
to the permitting agency by June 1, 1988, outlining parameters,
locations and frequency of monitoring. The study will be completed
and results submitted to the permitting agency at the 1.80 days
prior to permit reissuance.
This letter should be placed with your permit. All other terms and conditions of
your permit remain in full force and effect. A formal withdrawal of your adjudication
must be filed to close out this matter.
Continued . . .
Pollution Prevention Pay-s
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]

.7
If you have any questions, please contact Mr. Arthur Mouberry at 733-5083(
Yvonne Bailey at 733-7247.
Sincer61y,
R. Paul Wilms
cc: EPA
,goo re
Y—vonne Bailey
Groundwater Section
Compliance
F4

NPDES WASTE LUAD ALLOCATION
PERMIT NO.: NCOO 0 �IL
FACILITY NAME: Utike- �Owfv- Q-ly-
Facility Status: PItWSW
(circle ow)
Permit Status:(_!? EWl k NODWICATM UWF.R!►QI'Mu 1VEw
(circle ow)
Major Nino;_
Pipe No: col O11Ca 4hrokg��►�rED
,�- /11NS10N OF ENVtnn��'f ENTRI M170.,9ABE1
Design Capacity (MGD):
Domestic (Z of Flow): MAY 1'T ig�9
Industrial (% of Flow): /DO M0pRE9VIllE
ALG10NAE Off"
f
Comments: '
RECEIVING STREAM: Saab"- '1e:Ve-
Class: V) 5 ` /�
Sub -Basin: 03 -0y - 33
Reference USGS Quad: _ F /S 5W (please attach)
County. 6 "4
Regional Office: As Fa Mo . Ra Wa Wi WS
(circle one)
Requested By: —Date:7�
Prepared By:
Reviewed By
Date: ­
Date:
Modeler Date Rec. I s
zgl i'9 i sl49
Drainage Area (mid) Avg. Streamflow (cfs):
7Q10 (cfs) Winter 7Q10 (cfs) ,30Q2 (cfs)
Toxicity Limits: IWC X (circle sae) Acute / Chronic
Instream Monitoring:
Parameters --
Upstream Location 2 L� -It-,
DownstreamLocation
0
Effluent
Characteristics
Summer
Winter
SODS (mg/0
NHf N (mg/0
D.O. (mg/0
TSS (mg/0
F. Col. (/100ml)
pH (SU)
Comments: T \/

FOR APPROPRIATE DISCHARGERS, LIST COMPLETE GUIDELINE LIMITATIONS BELOW
Effluent Characteristics
Monthly
DailyAverage Maximum
Comments
3.1-3 T
Type of Product Produced
Lbs/Day Produced
Effluent Guideline Reference

RETURN TO TECHNICAL SERVICES BY MAY 25 9
Request No. :5148
--------------------- WASTELOAD ALLOCATION APPROVAL FORM ---------------------
Permit Number
NC0004961
Facility Name
DUKE POWER RIVERBEND:
001
Type of Waste
ONCE THRU COOLING
Status
EXIST/REN
Receiving Stream
CATAWBA RIVER
Stream Class
WS-III, B
Subbasin
030833
County
GASTON
Drainage Area
(sq mi)
1800
Regional Office
MRO A g
Average Flow
(cfs)
2700
Requestor
LULA HARRIS
Summer 7Q10
(cfs)
80(0-
Date of Request
2/28/89
10
(cfs)
31i�r)
Quad
F15SW
30Q2
(cfs)
------------------------- RECOMMENDED EFFLUENT LIMITS -------------------------
: reeomm. exist.
Wasteflow (mgd): monitor monitor
temperature (C) : 35 35
Ammonia Nitrogen (mg/1):
PIA
^issolved Oxygen (mg/1):
SS (mg/1):
Fecal Coliform (#/100ml). ,
pH ( SU) . 6-9 6-9
r
NA
�;ITI DEyE�ua
---- --------- -------------------- MONITORING ---------------------------------
Upstream (Y/N): Y Location: (WEEKLY TEMPERATURE)
Downstream (Y/N): Y Location: (WEEKLY TEMPERATURE)
COMMENTS
APPLICATION INDICATES FLOW AVERAGE OF 253 MGD; DMR'S INDICATE MAX OF 96.5 MGD.
PER CURRENT PERMIT, RECOMMEND NO DISCHARGE OF CHROMIUM, ZINC, COPPER, AND
CHLORINE. NO PRIORITY POLLUTANTS ABOVE DETECTION IN PPA.
BY LETTER AND AMENDMENT TO CURRENT PERMIT, RESULTS OF A STUDY TO ASSESS
IMPACT OF SURFACE AND GROUNDWATER INPUTS WAS REQUIRED TO BE SUBMITTED 180 DAYS
PRIOR TO EXPIRATION.
Recommended by " a- ( % Date
Reviewed by:
Tech. Support Supervisor Date
Regional Supervisor Q,,¢-J Date
Permits & Engineering al6t� Date
5 '�)
S1de�ii

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCOO 0 94
FACILITY NAME: ice- ar ..., _
Facility Status: PROP06ED
(circis one)
Permit Status: 0100MICATM Uarritpul r D NEW
WMIS one)
Major Minor, --
Pipe No:
6 0 2--
Design Capacity (MGD): J�kQy
Domestic M of Flown 0-
Industrial (% of Flow): 91,—
Comments:
RECEIVING STREAM: C�
Class: W3 •
Sub -Basin: 0 3 —dp " __7 ;13
Referents USGS Quad: �� St() (please attach)
County: (r a s- 4,1
Regional Office: As Fa MOO Ra Wa Wi WS
(egret* one)
Requested By: A Date:
Prepared By: ` C1 �L'�'" D Date:
Reviewed By: Date: 6-4 1 A5
Modeler Date Rec.
Drainage Area (mid) lam.— Avg. Streamflow (cfs): z-��'r'
i$1-0-(cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC 10—% (etrcte one) Acute / hronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
►
Effluent
Characteristics
Summer
�cf Gcx� 8/1)
5.--
Zo
(mg/1)
TSS (mg/0
�d
loe
pH (SU)
Comments:`
< ,eL

FOR APPROPRIATE DISCHARGERS, LIST COMPLETE GUIDELINE LIMITATIONS BELOW
Effluent Characteristics
Monthly
DailyAverage Maximum
Comments
o, I6ind G,Q
.So
ao. d ,�
�T 40 er'e 46-1
30.o
o a. aVw
0 o h o�Ks
1
,&
,
Type of Product Produced
Lbs/Day Produced
Effluent Guideline Reference
,l

RETURN TO TECHNICAL SERVICES BY
PV
Request No. :5149
--------------------- WASTELOAD ALLOCATION APPROVAL FORM ---------------------
Permit Number
NC0004961
Facility Name
DUKE POWER
RIVERBEND: 002
Type of Waste
ASH BASIN,
DOMESTIC, STORMWATER
Status
EXIST/REN
Receiving Stream
CATAWBA RIVER
Stream Class
WS-III, B
Subbasin
030833
County
GAS
R
Drainage Area
Average Flow
(sq mi)
(cfs)
1800
2700
Regional Office
MROTO�1
Requestor
LULA HARRIS
Summer 7Q10
(cfs)
8
Date of Request
2/28/89
W!�Rter= -Qli-^
(cfs)
311r)
Quad
F15SW
30Q2
(cfs)
------------------------- RECOMMENDED EFFLUENT LIMITS -------------------------
•
basis
Wasteflow
(mgd):
5.98
monitor
wla req
oil & grease
(mg/1):
15
20
bpt
Iron
(mg/1):
1
1
bat
^opper
(mg/1):
1
1
bat
SS
(mg/1):
30
100
bpt
Arsenic
(mg/1):
0.48
wq
pH
(SU):
6-9
6-9
bpt/wq
toxicity
wq attach
--------------------------------- MONITORING ---------------------------------
Upstream (Y/N): N Location:
Downstream (Y/N): N Location:
---------------------------------- COMMENTS ----------------------------------
BY LETTER AND AMENDMENT TO CURRENT PERMIT, RESULTS OF A STUDY TO ASSESS
IMPACT OF SURFACE AND GROUNDWATER INPUTS WAS REQUIRED TO BE SUBMITTED 180 DAYS
PRIOR TO EXPIRATION. /N<<; y,,V- -re",J"CQQ fie, te& LA.C, 1.,\Z 16 C9 .
-------------------------------------------------------------------------------
Recommended by Date G
Reviewed by:
Tech. Support Supervisor
Regional Supervisor
Permits & Enaineerina
Date q6
Date — 89
Date S-%S 75

VPV
Facility Named �� - t �^V�- J' Permit #
CHRONIC TOXICITY TESTING REQUIREMENT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity in any two consecutive toxicity tests,
using test procedures outlined W:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure - Revised *February 1987) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is to % (defined as treatment two in the North Carolina procedure
document). The permit holder shall perform quarterly monitoring using this procedure to establish
compliance with the permit condition. The first test will be performed after thirty days from
issuance of this permit during the months of a� oe� _ 3.-w. /�1��� . Effluent
sampling for this testing shall be performed at the 14PDES rmitted final e fluent discharge below
all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter
code TGP3B. Additionally, DEM Form AT-1 (original) is to be sent to the following address:
Attention: Technical Services Branch
North Carolina Division of
Environmental Management
P.O. Box 27687
Raleigh, N.C. 27611
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this
monthly test requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Environmental Management 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 and appropriate environmental controls, shall constitute an invalid test
and will require immediate retesting(within 30 days of initial monitoring event). Failure to submit
suitable test results will constitute noncompliance with monitoring requirements.
7Q10 34 cfs
Permuted Flow 5; 9 �' MGD Recommended by:
IWC% I0
Basin &Sub -basin 60'9
Receiving St -ream
County D
**Chronic Toxicity (Ceriodaphnia) P/F at j O oJr, See Part , Condition �r

. 4 / I ' I cj `1 yrn q
r
s
. State of North Carolina
Department of Natural Resources and Community Development
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor
S. Thomas Rhodes, Secretary
Mr. B. R. Sipe
Duke Power Company
PO Box 33189
Charlotte, NC 28242
Dear Mr. Sipe:
June 12, 1987 1W C. DFPr R. Paul Wilms
np
CERTIFIED MAIL cc R7:,f1t, N rr,R,.}Director
RETURN RECEIPT REQUES� WUNIl'r D t�Lt .
JUL 6 1987
DIVISI
Subje>rt: Permit No. (so&0' k}A
Riverbend +e ifllf � A"Ag ar
Gaston County E
In accordance with your application for discharge permit received on
June 7, 1985, we are forwarding herewith the subject State - NPDES permit.
This permit is issued pursuant to the requirements of North Carolina General
Statute 143-215.1 and the Memorandum of Agreement between North Carolina and
the US Environmental Protection Agency dated December 6, 1983.
If any parts, measurement frequencies or sampling requirements
contained in this permit are unacceptable to you, you may request a waiver
or modification pursuant to Regulation 15 NCAC 2B .0508(b) by written
request to the Director identifying the specific issues to be contended.
Unless such request is made within 30 days following receipt of this permit,
this permit shall be final and binding. Should your request be denied, you
will have the right to request an adjudicatory hearing.
Please take notice that this permit is not transferable. Part II, B.2.
addresses the requirements to be followed in case of change in ownership or
control of this discharge.
This permit does not affect the legal requirement to obtain other
permits which may be required by the Division of Envir6nmental Management or
permits required by the Division of Land Resources, 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 Mr.
Dale Overcash, at telephone number 919/733-5083.
ORIGINAL SIGN [� 1
FOR ARTHUR MOR. UBPa � Wilms
cc: Mr. Jim Patrick, EPA
Mooresville -Regional Stiff-i--r°di
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7697 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

61
Permit No. NC0004961
.STATE OF NORTH CAROLINA
DEPARTMENT OF NATURAL RESOURCES & COMMUNITY DEVELOPMENT
DIVISION OF ENVIRONMENTAL MANAGEMENT
P E R M I T
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 Power Company
is hereby authorized to discharge wastewater from a facility located
at
Riverbend Steam Station
Gaston County
to receiving waters designated as the Catawba River (Mountain Island
Lake) in the Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and
other conditions set forth in Parts I. II, and III hereof.
This permit shall be effective June 12, 1987
This permit and the authorization to discharge shall expire at
midnight August 31, 1989
Signed this day of June 12, 1987
1_ S1G4dti U g`1
U�`E,��1►� �,gpU'B� RR�c
PR l �AOF
Fop, R. Paul Wilms, Director
Division of Environmental Management
By Authority of the Environmental
Management Commission

Permit No. NC0004961 I
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1. Enter into a contract for construction of any
additional wastewater treatment facilities necessary to
comply with the final effluent limitations contained in
this permit, and
2. Continue to discharge once through cooling water from
outfall 001,' and
3. Continue to operate a 5a11onsep
tic
consisting of a 3,000 g tank followed by
tertiary treatment in an ash basin treatment system,
and
4. After receiving an Authorization to Construct from the
Division of Environmental Management, construct and
operate additional wastewater treatment facilities to
discharge stormwater runoff from a new dry flyash
landfill (See Part III of this permit), and
5. Discharge from said treatment works into the Catawba
River (Mountain Island Lake) which is classified Class
"WS-III & B" waters in the Catawba River Basin.

. . •.i,i.. .
A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
ont:the effective date of the Permit and lasting until expiration,
During the period beginning permittee is authorized to discharge from outfall(s) serial number(s). ool Once through cooling water
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Discharge Limitations Monitoring Requirements
Kg/day (lbs/day) Other Units (Specify) Measurement Sample * Sample
Daily Avg. Daily Max. Daily Avg. Daily Max. Frequency�� LocatT 'on
Flow
Temperature oC(oF)
35(95)
THERE SHALL BE NO CHROMIUM, ZINC, OR COPPER ADDED TO THE COOLING WATER.
Daily
Daily
Pump Log or
similar reading
Grab
*The Regional Administrator has determined pursuant to Section 316(a) of the Act that the thermal component
of the discharge assures. --the protection and propagation of a balanced, indigenous population of shellfish,
fish, and wildlife in andon the receiving body of water.
This permit does not authorize the discharge of chlorine from this outfall.
The permittee shall obtain authorization from the Division of Environmental Management prior to utilizing
any biocide in the cooling water (See Part III of this permit),
Effluent
Effluent
r+
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on the effective date of the Permit and lasting until expiration, the
from number(s). 002..Ash Settling pond (with
domestic
permittee is authorized to discharge
Such discharges shall be limited and
outfall(s)
monitored by the
serial
permittee as specified below;
wastewater)
:ffluent Characteristics Discharge
Limitations
Monitoring Requirements
Kg/day (lbs/day)
Other Units
(Specify)
Measurement
Sample Sample
Daily Avg. Daily Max.
Daily Avg.
Daily Max.
frequency
Type Location
Flow
Weekly
Pump logs or
Effluent
Similar readings
Total
Suspended Solids 1/
30.0 mg/1
100.0 mg/1
-2/Month 2/
Composite
Effluent
Oil and Grease
15.0 mg/l
20.0 mg/1
-2/Month 2/
Grab
Effluent
Total
Copper
1.0 mg/l
1.0 mg/1
2/Month
Composite
Effluent
Total
Iron
1.0 mg/1
1.0 mg/1
2/Month
Composite
Effluent
Total
Arsenic
470.0 ug/1
2/Month
Composite
Effluent
Total
Selenium
47.0 ug/1
2/Month
Composite
Effluent
Total
Nitrogen (NO2 + NO3 + TKN)
Monthly
Composite
Effluent
Total
Phosphorus
Monthly
Composite
Effluent
Total
Vanadium**
Quarterly
Composite
Effluent
*Effluent sampling shall be conducted at the discharge from the Ash Settling Pond prior to mixing with any other stream.
**Monitoring for Vanadium shall only be conducted for any quarter during which the generating plant is oil fired.
The metal cleaning waste, coal pile runoff, ash transport water, low volume waste, and domestic wastewater shall be
discharged into the Ash Settling Pond.
1/Daily average of 50 mg/1 is permitted provided that the permittee can satisfactorily demonstrate that the
difference between 30 mg/1 and 50 mg/1 is due to the concentration of total suspended solids in the source a -a M
c� M a
body. o -
2/One additional grab sample shall be collected and analyzed for Oil and Grease and Total Suspended Solids. o4- c
during the period of maximum expected flow for each rainfall event exceeding 1.25 inches per day. The rn Z
corresponding flow shall be reported. After a period of one year following the effective date of this permit,�-'�
the permittee may request elimination or reduction of frequency of th s sam ling.
The pH shall not be less than 6.0 standard units nor greater t an T o standard units
and shall be monitored 2/Month by grab samples at the confluence of the discharge and the receiving waters.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (3) EFFLUENT LIMITATION AND MONITORING REQUIREMENTS - FINAL
During the period beginning on. the effective date of the permit and lasting until expiration,
the permittee is authorized to discharge from outfall serial number 003-sludge/landfill settling pond..:
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
Oil and Grease
Total Suspended Solids
Total Copper
Total Iron
Total Arsenic
Total Selenium
Total Vanadium**
Total Phosphorus
Total Nitrogen (NO 2+ NO
Cadmium
Lead
Zinc
DischarRe
Limitations
Monitorin.&_Requirements
kg/day (lbs/day)
_
Other
Units
(Specify)
*Measurement
Sample Sample***
Daily_Avg._Dail�_MaxDaily_AvgDai
ly_Max_____FreguencYN_r
Type Location
Weekly
Instantaneous
E
15.0
mg/l
20.0
mg/l
2/Year 1/
Grab
E
30.0
mg/l
100.0
mg/l
2/Year 1/
Grab
E
1.0
mg/1
1.0
mg/1
2/Year
Grab
E
1.0
mg/l
1.0
mg/l
2/Year
Grab
E
470.0
ug/l
Annually
Grab
E
47.0
ug/l
Annually
Grab
E
Annually
Grab
E
Annually
Grab
E
+ TRN)
Annually
Grab
E
Annually
Grab
E
Annually
Grab
E
Annually
Grab
E
*During all periods of active landfill activity, the measurement frequency shall be increased as follows:
Flow - Daily
Oil & Grease, Total Suspended Solids, Total Copper, Total Iron and pH - Weekly
Total Arsenic, Total Selenium and Total Vanadium - 2/Month
Total Phosphorus and Total Nitrogen - Quarterly
Active landfill activity shall be considered to include, but not limited to, any significant land
disturbing activities including placement of sludge, compaction and final grading. The period of
active landfill activity shall generally be considered to last until final grading of top cover soil
and planting of vegetative cover have been completed.
k*Monitoring for Total Vanadium shall only be conducted for any year during which the generating plant is
oil fired.
**Sample Location: E - Effluent
1/On additional grab sample shall be collected and analyzed for Oil and Grease and Total Suspended Solids
during the period of maximum expected flow for each rainfall event exceeding 1.25 inches per day.
The corresponding flow shall be reported. After a period of one year following the effective date of
this permit, the permittee may request elimination or reduction of frequency of this sampling.
This requirement applies to inactive and active landfill activities.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be
monitored 2/Year by grab samples at the effluent.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Part I
Permit No. NC
B. SCHEDULE OF COMPLIANCE
1. The permittee shall achieve compliance with the effluent
limitations specified for discharges in accordance with the
foillowing schedule:
NOT APPLICABL6
2. No later than 14 calendar days following a date identified in
the above schedule of compliance, the permittee shall submit
either a report of progress or, in the case of specific actions
being required by identified dates, a written notice of
compliance or noncompliance. In the latter case, the notice
shall include the cause of noncompliance, any remedial actions
taken, and the probability of meeting the next scheduled
requirement.
14

C. MONITORING AND REPORTING
1. Representative Sampling
Samples collected and measurements taken
shall be characteristic of the volume
permitted discharge. Samples collected
than daily shall be taken on a day
characteristic of the discharge over the
the sample represents.
2. Reporting
as required herein
and nature of the
at a frequency less
and time that is
entire period which
Monitoring results obtained during the previous month(s)
shall be summarized for each month and reported on a monthly
Discharge Monitoring Report (DMR) Form (DEM No. MR 1, 1.1,
2, 3,) or alternative forms approved by the Director, DEM,
postmarked no later than the 30th day following the
completed,reporting period.
The first DMR is due on the last day of the month following
the issuance of the permit or in the case of a new facility,
on the last day of the month following the commencement of
discharge. Duplicate signed copies of these, and all other
reports required herein, shall be submitted to the following
address:
Division of Environmental Management
Water Quality Section
ATTN: Central Files
Post Office Box 27687
Raleigh, NC 27611
3. Definitions
a. Act or "the Act": The Federal Water Pollution Control
Act,. also know as the Clean Water Act, as amended, 33 U.S.C.
1251, et. seq.
b. The "daily average" discharge means the total discharge
by weight during a calendar month divided by the number of
days in the month that the production or commercial facility
was operating. Where less than daily sampling is required by
this permit, the daily average discharge shall be determined
by the summation of all the measured daily discharces by
weight divided by the number of days sampled during the
calendar month when the measurements were made.
C. The "daily maximum" discharge means the total discharge
by weight during any calendar day.
I 5

d. DEM or Division: means the Division of Environmental
Management, Department of Natural Resources and Community
Development.
e. EMC: used herein means the North Carolina Environmental
Management Commission.
f. Flow, M3/day (MGD): The flow limit expressed in this
permit is the 24 hour average flow, averaged monthly. It is
determined as the arithmetic mean of the total daily flows
recorded during the calendar month.
g. Arithmetic Mean: The arithmetic mean of any set of
values is the summation of the individual values divided by
the number of individual values.
h. Geometric Mean: The geometric mean of any set of values
is the Nth root of the product of the individual values
where N is equal to the number of individual values. The
geometric mean is equivalent to the antilog of the
arithmetic mean of the logarithms of the individual values.
For purposes of calculating the geometric mean, values of
zero (0) shall be considered to be one (1).
i. Composite Sample: These samples consist of grab samples
collected at equal intervals and combined proportional to
flow, a sample continuously collected proportionally to
flow, or equal volumes taken at varying time intervals. If a
composite sample is obtained from grab samples, the
following requirements apply. The intervals between influent
grab samples shall be no greater than hourly. Intervals
between effluent grab samples shall be no greater than
hourly except where the detention time of the wastewater in
the facility is greater than 24 hours, in which case, the
interval between grab samples shall be no greater in number
of hours than the detention time in number of days;
provided, however, in no case may the time between effluent
grab samples be greater than six hours nor the number of
grab samples less than four during any discharge period of
24 hours or less.
j. Grab Sample: Grab samples are individual samples
collected over a period of time not exceeding 15 minutes;
the grab sample can be taken manually.
I 6

4. Test Procedures
Test procedures for the analysis of pollutants shall conform
to the EMC regulations published pursuant to N.C.G.S.
143-215.63 et seq, the Water and Air Quality Reporting Act,
and to regulations published pursuant to Section 304(g), 33
USC 1314, of the Federal Water Pollution Control Act, As
Amended, and Regulation 40 CFR 136.
5. Recording Results
For each measurement or sample taken pursuant to the
requirements of this permit, the permittee shall record the
following information:
a. The exact place, date, and time of sampling;
b. The dates the analyses were performed; and
c. The person(s) who performed the analyses.
6. Additional Monitoring by Permittee
If the permittee monitors any pollutant at the location(s)
designated herein more frequently than required by this
permit, using approved analytical methods as specified
above, the results of such monitoring shall be included in
the calculation and reporting of the values is required in
the DMR. Such increased frequency shall also be indicated.
The DEM may require more frequent monitoring or the
monitoring of other pollutants not required in this permit
by written notification.
7. Records Retention
All records and information resulting from the monitoring
activities required by this Permit including all records of
analyses performed and calibration and maintenance of
instrumentation and recordings from continuous monitoring
instrumentation shall be retained for a minimum of three (3)
years. This period of retention shall be extended during the
course of any unresolved litigation or if requested by the
Division of Environmental Management or the Regional
Administrator of the Environmental Protection Agency.
I 7

PART II GENERAL CONDITIONS
A. MANAGEMENT REQUIREMENTS
1. Change in Discharge
All discharges authorized herein shall be consistent with
the terms and conditions of this permit. The discharge of
any pollutant identified in this permit more frequently than
or at a level in excess of that authorized shall constitute
a violation of the permit. Any anticipated facility
expansions, production increases, or process modifications
which will result in new, different, or increased discharges
of pollutants must be reported by submission of a new NPDES
application or, if such changes will not violate the
effluent limitations specified in this permit, by notice to
the DEM of such changes. Following such notice, the permit
may be modified to specify and limit any pollutants not
previously limited.
2. Noncompliance Notification
The permittee shall report by telephone to either the
central office or appropriate regional office of the
division as soon as possible but in no case more than 24
hours or on the next working day following the occurrence or
first knowledge of the occurrence of any of the following:
a. Any occurrence at the water pollution control
facility which results in the discharge of significant
amounts of wastes which are abnormal in quantity or
characteristic, such as the dumping of the contents of a
sludge digester, the known passage of a slug of
hazardous substance through the facility or any other
unusual circumstances.
b. Any process unit failure, due to known or unknown
reasons, that render the facility incapable of adequate
wastewater treatment, such as mechanical or electrical
failures of pumps, aerators, compressors, etc.
c. Any failure of a pumping station, sewer line, or
treatment facility resulting in a by-pass directly to
receiving waters without treatment of all or any portion
of the influent to such station or facility.
d. Any time that self -monitoring information indicates
that the facility has gone out of compliance with its
NPDES permit limitations.
I 8

Persons reporting such
file a written report
following first knowledge
3. Facilities Operation
occurrences by telephone shall also
in letter form within 15 days
of the occurrence.
The permittee shall at all times maintain in good working
order and operate as efficiently as possible all treatment
or control facilities or systems installed or used by the
permittee to achieve compliance with the terms and
conditions of this permit.
4. Adverse Impact
The permittee shall take all reasonable steps to minimize
any adverse impact to navigable waters resulting from
noncompliance with any effluent limitations specified in
this permit, including such accelerated or additional
monitoring as necessary to determine the nature and impact
of the noncomplying discharge.
5. Bypassing
Any diversion from or bypass of facilities is prohibited,
except (i) where unavoidable to prevent loss of life or
severe property damage, or (ii) where excessive storm
drainage or runoff would damage any facilities necessary for
compliance with the effluent limitations and prohibitions of
this permit. All permittees who have such sewer bypasses or
overflows of this discharge shall submit, not later than six
months from the date of issuance of this permit, detailed
data or engineering estimates which identify:
a. The location of each sewer system bypass or overflow;
b. The frequency, duration and quantity of flow from
each sewer system bypass or overflow.
The permittee shall report by telephone to either the
central office or appropriate regional office of the
division as soon as possible but in no case more than 24
hours or on the next working day following the occurrence or
first knowledge of the occurrence of any diversion from or
bypass of facilities.
I 9

6. Removed Substances
Solids, sludges, filter backwash,
removed in the course of treatment or
shall be disposed of in accordance
in a manner such as to prevent
materials from entering waters of
waters of the United States.
7. Power Failures
or other pollutants
control of wastewaters
with NCGS 143-215.1 and
any pollutant from such
the State or navigable
The permittee is responsible for maintaining adequate
safeguards to prevent the discharge of untreated or
inadequately treated wastes during electrical power failures
either by means of alternate power sources, standby
generators or retention of inadequately treated effluent.
8. Onshore or Offshore Construction
This permit does not authorize or approve the construction
of any onshore or offshore physical structures or facilities
or the undertaking of any work in any navigable waters.
B. RESPONSIBILITIES
1. Right of Entry
The permittee shall allow the Director of the Division of
Environmental Management, the Regional Administrator, and/or
their authorized representatives, upon the presentations of
credentials:
a. To enter upon the permittee's premises where an
effluent source is located or in which any records are
required to be kept under the terms and conditions of
this permit; and
b. At reasonable times to have access to and copy any
records required to be kept under the terms and
conditions of this permit; to inspect any monitoring
equipment or monitoring method required in this permit;
and to sample any discharge of pollutants.
I 10

2. Transfer of Ownership or Control
This permit is not transferable. In the event of any
change in name, control or ownership of facilities from
which the authorized discharge emanates or is contemplated,
the permittee shall notify the prospective owner or
controller by letter of the existence of this permit and of
the need to obtain a permit in the name of the prospective
owner. A copy of the letter shall be forwarded to the
Division of Environmental Management.
3. Availability of Reports
Except for data determined to be confidential under NCGS
143-215.3(a) (2) or Section 308 of the Federal Act, 33 USC
1318, all reports prepared in accordance with the terms
shall be available for public inspection at the offices of
the Division of Environmental Management. As required by
the Act, effluent data shall not be considered
confidential. Knowingly making any false statement on any
such report may result in the imposition of criminal
penalties as provided for in NCGS 143-215.1(b) (2) or in
Section 309 of the Federal Act.
4. Permit Modification
After notice and opportunity for a hearing pursuant to NCGS
143-215.1(b) (2) and NCGS 143-215.1(e) respectively, this
permit may be modified, suspended, or revoked in whole or
in part during its term for cause including, but not
limited to, the following:
a. Violation of any terms or conditions of this permit;
b. Obtaining this permit by misrepresentation or
failure to disclose fully all relevant facts; or
c. A change in any condition that requires either a
temporary or permanent reduction or elimination of the
authorized discharge.
I 11

5. Toxic Pollutants
Notwithstanding Part II, B-4 above, if a toxic effluent
standard or prohibition (including any schedule of
compliance specified in such effluent standard or
prohibition) is established under Section 307(a) of the Act
for a toxic pollutant which is present in the discharge, if
such standard or prohibition is more stringent than any
limitation for such pollutant in this permit, this permit
shall be revised or modified in accordance with the toxic
effluent standard prohibition and the permittee so notified.
6. Civil and Criminal Liability
Except as provided in permit conditions on "Bypassing" (Part
II, A-5) and "Power Failures" (Part II, A-7), nothing in
this permit shall be construed to relieve the permittee from
any responsibilities, liabilities, or penalties for
noncompliance pursuant to NCGS 143-215.3, 143-215.6 or
Section 309 of the Federal Act, 33 USC 1319. Furthermore,
the permittee is responsible for consequential damages, such
as fish killS, even though the responsibility for effective
compliance may be temporarily suspended.
7. Oil and Hazardous Substance Liability
Nothing in this permit shall be construed to preclude the
institution of any legal action or relieve the permittee
from any responsibilities, liabilities, or penalties to
which the permittee is or may be subject to under NCGS
143-215.75 et seq. or Section 311 of the Federal Act, 33 USC
1321. Furthermore, the permittee is responsible for
consequential damages, such as fish kills, even though the
responsibility for effective compliance may be temporarily
suspended.
8. Property Rights
The issuance of this permit does not convey any property
rights in either real or personal property, or any exclusive
privileges, nor does it authorize any injury to private
property or any invasion of personal rights, nor any
infringement of Federal, State or local laws or regulations.
I 12

9. Severability
The provisions of this permit are severable, and if any
provision of this permit to any circumstance is held
invalid, the application of such provision to other
circumstances, and the remainder of this permit shall not be
affected thereby.
10. Expiration of Permit
Permittee is not authorized to discharge after the
expiration date. In order to receive authorization to
discharge beyond the expiration date, the permittee shall
submit such information, forms, and fees as are required by
the agency authorized to issue permits no later than 180
days prior to the expiration date. Any discharge without a
permit after the expiration will subject the permittee to
enforcement procedures as provided in NCGS 143-215.6, and 33
USC 1251 et seq.
I 13

PART III OTHER REQUIREMENTS
A. Previous Permits
All previous State water quality permits issued to this
facility, whether for construction or operation or discharge,
are hereby revoked by issuance of this permit. The conditions,
requirements, terms, and provisions of this permit authorizing
discharge under the National Pollutant Discharge Elimination
System govern discharges from this facility.
B. Construction
No construction of wastewater treatment facilities or additions
thereto shall be begun until Final Plans and Specifications have
been submitted to the Division of Environmental Management and
written approval and Authorization to Construct has been issued.
C. Certified Operator
Pursuant to Chapter 90A of North Carolina General Statutes, the
permittee shall employ a certified wastewater treatment plant
operator in responsible charge of the wastewater treatment
facilities. Such operator must hold a certification of the grade
equivalent to or greater than the classification assigned to the
wastewater treatment facilities.
D. Groundwater Monitoring
The permittee shall, upon written notice from the Director of
the Division of Environmental Management, conduct groundwater
monitoring as may be required to determine the compliance of
this NPDES permitted facility with the current groundwater
standards.
E. Limitations Reopener
This permit shall be modified or alternatively, revoked and
reissued, to comply with any applicable effluent guideline or
water quality standard issued or approved under Sections
302 (b) (2) (c) , and (d) , 304(b)(2), and 307 (a) (2) of the Clean
Water Act, if the effluent guideline or water quality standard
so issued or approved:
1. contains different conditions or is otherwise more
stringent than any effluent limitation in the permit; or
2. controls any pollutant not limited in the permit.
I 14

Part III Continued
Permit No. NC0004961
F. Toxicity Repener
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 may be
expected in the receiving stream as a result of this discharge.
G. In the event that waste streams from various sources are combined
for treatment or discharge, the quantity of each pollutant or
pollutant property attributable to each controlled waste source
shall not exceed the specified limitation for that waste source.
H. There shall be no discharge of polychlorinated byphenyl compounds
such as those commonly used for transformer fluid.
I. The permittee shall not use any biocides except these 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 Environmental Management.
Such notification shall include completion of Biocide Worksheet
Form 101 and a map locating the discharge point and receiving
stream.
J. Continued intake screen backwash discharge is permitted without
limitations or monitoring requirements.
R. Nothing contained in this permit shall be construed as a waiver by
the permittee or any right to a hearing it may have pursuant to
State or Federal Laws or regulations.
L. The term "low volume waste sources" means the waste is taken
collectively as if from one source except those for which specific
limitations are otherwise established in this part. Low volume
wastes sources include but are not limited to: wastewaters from
wet scrubber air pollution control systems, ion exchange water
treatment system, water treatment evaporator blowdown, laboratory
and sampling streams, boiler blowdown, floor drains, cooling tower
basin cleaning wastes, and recirculating house -service water
systems. Sanitary and air conditioning wastes are not included.
M. 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.
Metal cleaning will be conducted according to Duke Power's approved
equivalency demonstration.
N. The term "chemical metals 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.

Part III Continued
Permit No. NC0004961
0. It has been determined from information submitted that the plans
and procedures in place at Riverbend Steam Station are equivalent
to that of a BMP.
P. "Upset" means an exceptional incident in which there is
unintentional and temporary noncompliance with technology based
permit effluent limitations because of factors beyond the
reasonable control of the permittee. An upset does not include
noncompliance to the extent caused by operational error, improperly
designed treatment facilities, inadequate treatment facilities,
lack of preventive maintenance, or careless or improper operations.
Q. Any discharge of domestic wastewater from the existing sand filter
treatment system constitutes an illegal bypass. An occurrence of
this type must be reported promptly to the Division of Enironmental
Management and corrected immediately.
R. If the permittee, after monitoring for at least six months,
determines that he is consistently meeting the effluent limitations
contained herein, the permittee may request of the Director that
the monitoring requirements be reduced to a lesser frequency.
S. An assessment shall be made of the existing groundwater quality in
y the immediate vicinity of the dredge pond. If contaminants are
encountered at or below a depth of 20 feet, the vertical and
horizontal extent of those contaminants should be established. This
assessment should be made prior to use of the dredge pond in order
that background groundwater quality can be established.
T. A similar assessment shall be made to establish groundwater quality
around the periphery of the existing ash ponds, Since groundwater
in the vicinity of the ponds will ultimately discharge into the
Catawba River, discovery of any contaminants in the GA zone should
lead to a determination of which areas, at what depths and in what
concentrations those contaminants are entering the river. The
permittee shall, within 90 days of permit issuance, submit to the
Department for approval a proposed plan to assess groundwater
quality at the existing fly ash basins. The plan shall include (a)
a schedule for completion of each phase of the investigation and (b)
a proposed monitoring well network sufficient to detect any
contaminants which could reach the river.
U. The discharge of any product registered under the Federal
Insecticide, Fungicide, and Rodenticide Act to any waste stream
which ultimately may be released to waters of the United States is
prohibited unless specifically authorized elsewhere in this permit.

�'• r nrT,
COM111G'`II�y VDtiLOP RAI,
MAY 12 1987
OIiISION CF £NVIIRON,VFNF41
kiGBfSVIIIf RfGIDIy� Bff�E�
May 5, 1987
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr. John T. Marlar, Chief
Facilities Performance Branch
US Environmental Protection Agency
Region IV
345 Courtland Street
Atlanta, GA 30365
Subject: NPDES Permit No. NCOOO4961
Permit Modification
Duke Power Company
Riverbend Steam Station
Gaston County
Dear Mr. Marlar:
Please find enclosed a copy of the final draft permit for Duke
Power Company - Riverbend Steam Station. The permit has been modified
to incorporate the recommendations from your staff.
In accordance with the Memorandum of Agreement, the Division of
Environmental Management intends to issue this final permit unless
comments are received from the Environmental Protection Agency within 15
days of your receipt of this letter.
If you have any questions, please contact Mr. Dale Overcash at
919/733-5083.
Sincerely,
,.:7Y
C "E iT
George T. Everett, Chief
Water Quality Section
cc:
Mr. Dale Overcash
Mr. R. J. Waldrop

P.ormit No. NC0004961
STATE OF NORTH CAROLINA
DEPARTMENT OF NATURAL RESOURCES & COMMUNITY DEVELOPMENT
DIVISION OF ENVIRONMENTAL MANAGEMENT
P E R M I T
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 Power Company
is hereby authorized to discharge wastewater from a facility located
at
Riverbend Steam Station
Gaston County
to receiving waters designated as the Catawba River (Mountain Island
Lake) in the Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and
other conditions set forth in Parts I, II, and III hereof.
This permit shall be effective
This permit and the authorization to discharge shall expire at
midnight August 31, 1989
Signed this day of
r
DR
Paul Wilms, Director
Division of Environmental Management
By Authority of the Environmental
Management Commission

Permit No. NC0004961
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1. Enter into a contract for construction of any
additional wastewater treatment facilities necessary to
comply with the final effluent limitations contained in
this permit, and
2. Continue to discharge once through cooling water from
outfall 001, and
3. Continue to operate a 5.98 MGD treatment facility (002)
consisting of a 3,000 gallon septic tank followed by
tertiary treatment in an ash basin treatment system,
and
4. After receiving an Authorization to Construct from the
Division of Environmental Management, construct and
operate additional wastewater treatment facilities to
discharge stormwater runoff from a new dry flyash
landfill (See Part III of this permit), and
5. Discharge from said treatment works into the Catawba
River (Mountain Island Lake) which is classified Class
"WS-III 6 B" waters in the Catawba River Basin.

A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning ont.the effective date of the Permit and lasting until expiration,
permittee is authorized to discharge from outfall(s) serial number(s).001 Once through cooling water
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
Discharge Limitations
Kg/day (lbs/day)
Daily Avg. Daily Max.
Temperature 0C(0F)
Other Units (Specify)
Daily Avg. Daily Max.
35(95)
THERE SHALL BE NO CHROMIUM, ZINC, OR COPPER ADDED TO THE COOLING WATER.
Monitoring Requirements
Measurement Sample * Sample
Frequency. —Type Locat on
Daily Pump Log or
similar reading
Daily Grab
*The Regional Administrator has determined pursuant to Section 316(a) of the Act that the thermal component
of the discharge assures.•the protection and propagation of a balanced, indigenous population of shellfish,
fish, and wildlife in andon the receiving body of water.
This permit does not authorize the discharge of chlorine from this outfa-11.
The permittee shall obtain authorization from the Division of Environmental Management prior to utilizing
any biocide in the cooling water (See Part III of this permit),
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Effluen
Effluen
rti

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on the effective date of the Permit and lasting until expiration, the
permittee is authorized to discharge from outfall(s) serial number(s). 002. Ash Settling pond (with domestic
Such discharges shall be limited and monitored by the permittee as specified below: wastewater)
fluent Characteristics
H
Flow
Discharge Limitations
Kg/day (lbs/day)
Daily Avg. Daily Max.
Total Suspended Solids 1/
Oil and Grease
Total Copper
Total Iron
Total Arsenic
Total Selenium
Total Nitrogen (NO2 + NO + TKN)
Total Phosphorus
Total Vanadium**
Other Units (Specify)
Daily Avg. Daily Max.
Monitoring Requirements
Measurement Sample Sample
Frequency - Type Location
Weekly
30.0 mg/l
100.0 mg/1
-2/Month 2/
15.0 mg/l
20.0 mg/l
-2/Month 2/
1.0 mg/l
1.0 mg/l
2/Month
1.0 mg/l
1.0 mg/1
2/Month
470.0 pg/l
2/Month
47.0 ug/l
2/Month
Monthly
Monthly
Quarterly
Pump logs or Effluent
Similar readings
Composite
Effluent
Grab
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
Composite
Effluent
*Effluent sampling shall be conducted at the discharge from the Ash Settling Pond prior to mixing with any other stream.
**Monitoring for Vanadium shall only be conducted for any quarter during which the generating plant is oil fired.
The metal cleaning waste, coal pile runoff, ash transport water, low volume waste, and domestic wastewater shall be
discharged into the Ash Settling Pond.
1/Daily average of 50 mg/l is permitted provided that the permittee can satisfactorily demonstrate that the
difference between 30 mg/l and 50 mg/l is due to the concentration of total suspended solids in the source
body.
Cl) a -as
2/One additional grab sample shall be
collected and analyzed for Oil and Grease and Total
Suspended Solids
-8;
during the period of maximum expected
flow for each rainfall event exceeding 1.25 inches per day. The
o 0-4
corresponding
flow shall be reported.
After a period of one year following the effective
date of this permit,►-'o
Z
the permittee
may request elimination
or reduction of frequency of th s sam ling.
T
The pH shall
not be less than 6.0
standard units nor greater tian o standard
units
and shall be
monitored 2/Month by grab samples at the confluence of the discharge and the
receiving waters.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

"s A. (3) EFFLUENT LIMITATION AND MONITORING REQUIREMENTS - FINAL
Duringthe
period beginning on the effective date of the permit and lasting until expiration,
the permittee is authorized to discharge from outfall serial number 003-s ett
Such discharges shall be limited and monitored b the iedgbelandfill settling pond.
y permittee as specified below:
Effluent Characteristics
—"'---- --- _ Discharge Limitations
kg/day Monitoring Requirements
y) Other Units (Specify) *Measurement pl
Same 'Sampler
Flow Daily A�._Dail�-Max.--Dai1�Av�N
Oil and Grease Dail MaxN- Frequence ocatic
0 Weekly-T��----L~
y Instantaneous E
Total Suspended Solids 15.mg/1 20.0 mg/1 2/Year 1/ Grab E
Total;Copper 30.0 mg/l 100.0 mg/l 2/Year 1/ Grab E
Total'Iron 1.0 mg/l 1.0 mg/l 2/Year Grab
Total Arsenic E
1.0 mg/1 1.0 mg/1 2/Year Grab
Total Selenium 470.0 ug/1 E
Annually Grab E
Total Vanadium** 47.0 ug/l Annually Grab E
Total Phosphorus Annually Grab E
Total Nitrogen (NO + NO + TKN) Annually Grab E
Cadmium Lead Annually Grab E Zinc Annually Grab E
Annually Grab
*Duringall E
periods of active landfill activity, Annually Grab E
Flow - Daily y, the measurement frequency shall be increased as follows:
Oil 6 Grease, Total Suspended Solids, Total Copper, Total Iron and pH - Weekl
Total Arsenic, Total Selenium and Total Vanadium - Bi-Weekly y
Total Phosphorus and Total Nitrogen - Quarterly
Active landfill activity shall be considered to include, but not limited to, any significant 1
disturbing activities including placement of sludge, compaction and final grading. The eri and
active landfill activity shall generally be considered to last until final grading of top of
and planting of vegetative cover have been completed. P coversoil
**Monitoring for Total Vanadium shall only be conducted for any year during generating
oil fired. ng which the g ating plant is
**Sample Location: E - Effluent
1/On additional grab sample shall be collected and analyzed for Oil and Grease and Total
during the period of maximum expected flow for each rainfall event excee 2inch per day.
Suspended Solids
The corresponding flow shall be reported. After a period of one year followingtheeffes
ect
this permit, the permittee may request elimination or reduction of frequency of this sampling.
This requirement applies to inactive and active landfill activities. p ineffective date of
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall
monitored 2/Year by grab samples at the effluent. be
There shall be no discharge of floating solids or visible foam in other than r,- —

Part III Continued
Permit No. NC0004961
F. Toxicity Repener
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 may be
expected in the receiving stream as a result of this discharge.
G. In the event that waste streams from various sources are combined
for treatment or discharge, the quantity of each pollutant or
pollutant property attributable to each controlled waste source
shall not exceed the specified limitation for that waste source.
H. There shall be no discharge of polychlorinated byphenyl compounds
such as those commonly used for transformer fluid.
I. The permittee shall not use any biocides except these 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 Environmental Management.
Such notification shall include completion of Biocide Worksheet
Form 101 and a map locating the discharge point and receiving
stream.
J. Continued intake screen backwash discharge is permitted without
limitations or monitoring requirements.
K. Nothing contained in this permit shall be construed as a waiver by
the permittee or any right to a hearing it may have pursuant to
State or Federal Laws or regulations.
L. The term "low volume waste sources" means the waste is taken
collectively as if from one source except those for which specific
limitations are otherwise established in this part. Low volume
wastes sources include but are not limited to: wastewaters from
wet scrubber air pollution control systems, ion exchange water
treatment system, water treatment evaporator blowdown, laboratory
and sampling streams, boiler blowdown, floor drains, cooling tower
basin cleaning wastes, and recirculating house service water
systems. Sanitary and air conditioning wastes are not included.
M. 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.
Metal cleaning will be conducted according to Duke Power's approved
equivalency demonstration.
N. The term "chemical metals 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.

0. It has been determined
and procedures in place
to that of a BMP.
Part III Continued
Permit No. NC0004961
from information submitted that the plans
at Riverbend Steam Station are equivalent
P. "Upset" means an exceptional incident in which there is
unintentional and temporary noncompliance with technology based
permit effluent limitations because of factors beyond the
reasonable control of the permittee. An upset does not include
noncompliance to the extent caused by operational error, improperly
designed treatment facilities, inadequate treatment facilities,
lack of preventive maintenance, or careless or improper operations.
Q. Any discharge of domestic wastewater from the existing sand filter
treatment system constitutes an illegal bypass. An occurrence of
this type must be reported promptly to the Division of Enironmental
Management and corrected immediately.
R. If the permittee, after monitoring for at least six months,
determines that he is consistently meeting the effluent limitations
contained herein, the permittee may request of the Director that
the monitoring requirements be reduced to a lesser frequency.
S. An assessment shall be made of the existing groundwater quality in
the immediate vicinity of the dredge pond. If contaminants are
encountered at or below a depth of 20 feet, the vertical and
horizontal extent of those contaminants should be established. This
assessment should be made prior to use of the dredge pond in order
that background groundwater quality can be established.
T. A similar assessment shall be ma4e to establish groundwater quality
around the periphery of the existing ash ponds: Since groundwater
in the vicinity of the ponds will ultimately discharge into the
Catawba River, discovery of any contaminants in the GA zone should
lead to a determination of which areas, at what depths and in what
concentrations those contaminants are entering the river. The
permittee shall, within 90 days of permit issuance, submit to the
Department for approval a proposed plan to assess groundwater
quality at the existing fly ash basins. The plan shall include (a)
a schedule for completion of each phase of the investigation and (b)
a proposed monitoring well network sufficient to detect any
contaminants which could reach the river.
U. The discharge of any product registered under the Federal
Insecticide, Fungicide, and Rodenticide Act to any waste stream
which ultimately may be released to waters of the United States is
prohibited unless specifically authorized elsewhere in this permit.

P. O. BOX 33189
February 27, 1987
DUKE POWER COMPANY
GENERAL OFFICES
422 SOUTH CHURCH STREET
CHARLOTTE. N. C. 28242
Mr M Dale Overcash
NPDES Permits Group Leader
North Carolina Department
Resources and Community
P 0 Box 27687
Raleigh, NC 27611
I1AR 11 1987
D-64 P40
1I.',-k 311417.
(D.
TELEPHONE: AREA 704
373-4011
of Natural
ment
Develo r
p PERMITS & ENalNcMJqb';-"T. oi, .,,..
co,:.bj"$ LOI>.
Re: Riverbend Steam Station MAR i 1�01
NPDES Permit No NC0004691
File No: RB-394, GAH-0207 alySSION OF ENVIfi^ ;; MA,lA,
_ RESVi((f p�crEnN�T�AI' 6ENq�f
Dear Mr Overcash:
We have reviewed the comments on the subject permit submitted to
Dr George Everett on December 23, 1986 by EPA. We offer the
following responses:
1. EPA has used this opportunity to comment on a section of the
permit for which we have not requested modifications. In
order to modify the permit limitations for Outfall 001, the
modification or reopener procedures as outlined in
Part II, B(4,5) and Part III, J of the permit must be
followed. Since no modification has been requested and
reopener procedures have not been followed, it is
inappropriate to modify the limitations of Outfall 001 at
this time.
2. EPA has agreed that the 30/100 TSS limits and the 15/20 Oil
and Grease limits are appropriate if additional monitoring
is performed during periods of high rainfall runoff. We
have no problems with this as it applies to Outfall 003:
Dry Flyash Landfill Discharge. However, high rainfall
runoff monitoring of Outfall 002: Ash Settling Pond
Discharge, is inappropriate. This pond has an adequate
history to show that sufficient treatment is given to remove
oil and grease and TSS and meet permit limitations.
Attached is a table which lists the monitoring results for
both pollutants from the period of 1980 through 1985.
EPA recommends that additional high rainfall runoff
monitoring be performed in accordance with the August 1985
Hanmer Memorandum. This memorandum suggests monitoring when
rainfall events exceed 25% of the 10 year-24 hour event.
For Gaston County, this storm is 5 inches of rainfall.
Therefore, additional monitoring should be required when
storm events exceed 1.25 inches per day.

Mr M Dale Overcash
February 27, 1987
Page 2
The following paragraph may be included for Outfall 003:
Dry Flyash Landfill Discharge only:
One additional grab sample shall be collected and
analyzed for Oil and Grease and Total Suspended Solids
during the period of maximum expected flow for each
rainfall event exceeding 1.25 inches per day. The
corresponding flow shall be reported. After a period
Of six months following the effective date of this
permit, the permittee may request elimination or
reduction of frequency of this sampling.
3. We have no objections to the comments listed by EPA in this
section.
We appreciate the opportunity to respond to these comments. If
there are any questions, please call Bob Waldrop at 704-373-2771.
Yours truly,
S B Hager, Chief Engineer
Civil -Environmental Division
AR-5(/j4b�
By: R J Waldrop
Design Engineer I
RJW/cgs
Enclosures
cc: L W Pace
J E Lansche

v
RIVERBEND STEAM STATION
OUTFALL 002 ASH
SETTLING POND
OIL AND GREASE AND
TSS, 1980 -
1985
TSS (mg/1)
Oil
and Grease
(mg/1)
Min.
Avg.
Max.
Min.
Avg.
Max.
1980 Jan.
7.8
20.7
38.8
0.1
0.2
0.2
Feb.
12.1
21.4
51.6
0.2
0.3
0.3
Mar.
18.1
28.7
41.0
0.1
0.3
0.4
April
15.4
23.5
36.3
0.1
0.3
0.5
May
8.6
23.4
43.0
0.1
0.3
0.4
June
4.4
18.8
31.6
0.1
0.2
0.3
July
8.5
25.6
45.7
0.2
0.4
0.6
Aug.
6.7
26.3
53.6
0.1
0.2
0.2
Sept.
4.2
10.5
16.7
0.1
0.2
0.2
Oct.
6.0
9.9
13.6
0.1
0.1
0.1
Nov.
7.0
12.2
17.0
0.1
0.1
0.1
Dec.
15.0
26.9
36.4
0.1
0.3
0.4
1981 Jan.
16.1
29.8
39.6
0.1
0.2
0.2
Feb.
4.8
20.4
51.7
0.2
0.2
0.2
Mar.
16.1
27.7
44.7
0.1
0.2
0.2
April
3.7
11.4
20.7
0.1
0.2
0.3
May
2.1
6.1
11.8
0.2
0.5
0.8
June
2.2
5.9
13.1
0.1
0.2
0.2
July
4.7
9.1
12.8
0.2
0.2
0.2
Aug.
7.8
13.3
20.5
0.1
0.3
0.4
Sept.
2.2
10.8
20.8
0.1
0.2
0.3
Oct.
10.2
19.0
30.6
0.1
0.2
0.2
Nov.
5.6
12.7
31.3
0.1
0.1
0.1
Dec.
14.6
24.9
33.5
0.1
0.2
0.2

TSS (mg/1)
Oil
and Grease
(mg/1)
Min.
Avg•
Max.
Min.
Avg.
Max.
1982 Jan.
28.1
49.1
71.4
0.1
0.2"
0.2
Feb.
20.9
30.6
51.5
0.2
0.3
0.3
Mar.
21.2
33.7
57.2
0.1
0.3
0.5
April
14.6
25.2
42.8
0.1
0.2
0.2
May
11.2
17.0
27.2
0.1
0.2
0.2
June
13.9
25.7
42.5
0.2
0.2
0.2
July
4.4
14.1
41.2
0.1
0.2
0.2.
Aug.
4.4
8.8
22.3
0.1
0.2
0.2
Sept.
4.5
8.9
15.6
0.1
0.1
0.1
Oct.
1.9
8.8
24.8
0.1
0.1
0.1
Nov.
3.6
14.0
23.0
0.1
0.1
0.1
Dec.
6.1
12.8
19.2
0.1
0.2
0.2
1983 Jan.
3.8
-7.4
13.4
0.1
0.1
0.1 a
Feb.
4.6
9.2
16.1
0.1
0.1
0.1
Mar.
3.2
5.9
12.4
0.1
0.1
0.1
April
3.8
7.2
11.8
0.1
0.2
0.2
May
0.5
3.2
9.4
0.1
0.1
0.2=
June
0.1
1.7
6.3
0.2
0.2
0.2
July
0.3
3.1
7.0
0.1
0.1
0.1
Aug.
3.0
5.1
9.9
0.2
0.2
0.2
Sept.
0.5
3.7
11.8
0.1
0.1
0.1
Oct.
2.0
5.0
0.1
0.1
0.1
Nov.
3.7
9.9
0.1
0.1
0.2
Dec.
2.0
6.7
21.6
0.1
0.1
0.1

TSS (mg/1)
Oil
and Grease
(mg/1)
Min.
Avg-
Max.
Min.
Avg-
Max.-
1984 Jan.
11.5
21.9
48.7
0.1
0.1-
0.1
Feb.
7.2
16.3
34.3
0.1
0.1
0.1
Mar.
12.5
23.8
46.1
0.1
0.1
0.1
April
7.1
10.8
18.1
0.1
0.1
0.1
May
2.0
4.4
9.2
'0.1
0.1
0.1
June
0.8
2.7
7.6
0.1
0.1
0.1
July
0.1
1.9
6.7
0.1
5.0
10.0
Aug.
0.5
4.0
7.6
0.1
0.1
0.1
Sept.
0.1
2.6
5.3
0.1
0.1
0.2
Oct.
0.3
1.2
2.3
0.1
0.1
0.2
Nov.
1.0
2.8
7.1
0.1
0.1
0.1
Dec.
1.3
1.9
2.7
0.1
0.1
0.1
1985 Jan.
2.1
3.6
5.2
0.1
0.3
0.5
Feb.
16.7
18.4
20.1
0.1
1.9
3.8
Mar.
7.1
14.4
21.8
0.1
0.2
0.4
Apr.
7.5
12.6
17.7
a
0.1
0.2
0.4
May
6.8
7.5
8.3
0.3
0.3
0.4
June
4.4
6.6
8.8
0.1
0.2
0.3
July
7.1
8.4
9.0
0.1
0.1
0.2
Aug.
7.2
7.3
7.4
0.1
0.4
0.8
Sept.
4.7
9.7
14.7
0.1
0.3
0.5
Oct.
2.1
2.7
3.4
0.1
0.1
0.1
Nov.
8.3
10.5
12.7
0.1
0.2
0.4
Dec.
121.0
19.9
27.8
0.2
0.2
0.2
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Permit No. NC0004961
STATE OF NORTH CAROLINA
DEPARTMENT OF NATURAL RESOURCES & COMMUNITY DEVELOPMENT
DIVISION OF ENVIRONMENTAL MANAGEMENT
P E R M I T
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 Power Company
is hereby authorized to discharge wastewater from a facility located
at
Riverbend Steam Station
Gaston County
to receiving waters designated as the Catawba River (Mountain Island
Lake) in the Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and
other conditions set forth in Parts I, II, and III hereof.
This permit shall be effective
This permit and the authorization to discharge shall expire at
midnight August 31, 1989
Signed this day of
R. Paul Wilms, Director
Division of Environmental Management
By Authority of the Environmental
Management Commission

Permit No. NC0004961
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1. Enter into a contract for construction of any additional
wastewater treatment facilities necessary to comply with
the final effluent limitations contained in this permit,
and
2. Continue to discharge once through cooling water from
outfall 001, and
3. Continue to operate a 5.98 MGD treatment facility (002)
consisting of a 3,000 gallon septic tank followed by
secondary treatment and disinfection in an ash basin
treatment system, and
4. After receiving an Authorization to Construct from the
Division of Environmental Management, construct and
operate additional wastewater treatment facilities to
discharge stormwater runoff from a new dry flyash
landfill (See Part III of this permit), and
5. Discharge from said treatment works into the Catawba
River (Mountain Island Lake) which is classified Class
"WS—III & B" waters in the Catawba River Basin.

A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning oni.the effective date of the Permit and lasting until expiration,
permittee is authorized to discharge from outfalI(s) serial number(s) . 001 Once through cooling water
Such discharges shall be limited and monitored by the permittee as specified below:
effluent Characteristics
Flow
Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
Temperature 0C(0F)
Residual Chlorine**
35(95)
Monitoring Requirements
Measurement Sample * Sample
Frequency �e Loc�on
Daily Pump Log or Efflue
similar reading
Daily Grab Efflue
Weekly Grab Efflue
MERE SHALL BE NO CHROMIUM, ZINC, OR COPPER ADDED TO THE COOLING WATER.
*The Regional Administrator has determined pursuant to Section 316(a) of the Act that the thermal component
of the discharge assures the protection and propagation of a balanced, indigenous population of shellfish,
fish, and wildlife in andon the receiving body of water.
**Monitoring requirements only apply if -chlorine is added to the cooling water.
The permittee shall obtain authorization from the Division of Environmental Management prior to utilizing
any biocide in the cooling water (See Part III of this permit),
There shall be no discharge of floating solids or visible foam in other than trace amounts.

n
A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on the effective date of the Permit and lasting until expiration, the .
permittee is authorized to discharge from outfall(s) serial number(s). 002. Ash Settling pond (with domest
Such discharges shall be limited and monitored by the permittee as specified below: wastewater)
ffluent Characteristics
Flow
Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
Total Suspended Solids 1/
Oil and Grease
Total Copper
Total Iron
Total Arsenic
Total Selenium
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Total Vanadium**
Monitoring Requirements
Measurement Sample Sample
Frequency Type Location
Weekly
Pump logs or
Effluer
Similar readings
30.0 mg/1
100.0 mg/1
2/Month
Composite
Effluer
15.0 mg/l
20.0 mg/l
2/Month
Grab
Effluer
1.0 mg/1
1.0 mg/l
2/Month
Composite
Effluer
1.0 mg/1
1.0 mg/1
2/Month
Composite
Effluer
470.0 µg/1
2/Month
Composite
Effluer.
47.0 µg/1
2/Month
Composite
Effluer
Monthly
Composite
Effluer
Monthly
Composite
Effluer
Quarterly
Composite
Effluer
*Effluent sampling shall be conducted at the discharge from the Ash Settling Pond prior to mixing with any other strez
**Monitoring for Vanadium shall only be conducted for any quarter during which the generating plant is oil fired.
The metal cleaning waste, coal pile runoff, ash transport water, low volume waste, and domestic wastewater shall be
discharged into the Ash Settling Pond.
1/Daily average of
50 mg/1 is permitted provided
that the permittee
can satisfactorily demonstrate that the
difference between
30 mg/1 and 50 mg/1 is due to
the concentration
of total suspended solids in the source
z
o D
body.
o
(D su
oa
o
4--
c+ ►-.
rn
z
r
O
The pH shall not
be less than 6.0 standard
units nor greater
than 9.0 standard units
and shall be monitored
2/Month by grab samples at
the confluence of
the discharge and the receiving waters.
There shall be no
discharge of floating solids or visible foam in
other than trace amounts.

A. (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on the effective date of the Permit
and lasting until
expiration,
the
permittee is authorized to discharge
from outfall(s)
serial number(s). 004 Dry Flyash Landfill
Such discharges shall be limited and
monitored by the
permittee
as specified below:
:ffl uent Characteristics Discharge
Limitations
Monitoring Requirements
Kg/day (lbs/day)
Other Units
(Specify)
Measurement
Sample
* Sample
Daily Avg. Daily Max.
Daily Avg.
Daily Max.
Frequency
— ype
Location
Flow
0.16 MGD
Continuous
Recording
I or E
Total Suspended Solids
30.0 mg/1
100.0 mg/l
2/Month
Composite
E
Oil and Grease
15.0 mg/1
20.0 mg/l
2/Month
Grab
E
Arsenic
470.0 ug/1
2/Month
Composite
E
Selenium
47.0 ug/l
2/Month
Composite
E
Total Nitrogen (NO2 + NO3 + TKN)
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
E
Total Copper
1.0 mg/l
1.0 mg/1
2/Month
Composite
E
Total Iron
1.0 mg/l
1.0 mg/1
2/Month
Composite
E
Total Vanadium**
Quarterly
Composite
E
*Effluent sampling shall be conducted at the discharge from the
dry flyash
landfill prior to
mixing with
any
other waste stream.
Sample locations: E - Effluent, I - Influent
**Monitoring for Vanadium shall only be conducted for any quarter during which the generating plant is oil fired.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
and shall be monitored 2/Monthby grab sample at the confluence of the discharge and the receiving waters.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Part III Continued
Permit No. NC0004961
F. In the event that waste streams from various sources are combined
for treatment or discharge, the quantity of each pollutant or
pollutant property attributable to each controlled waste source
shall not exceed the specified limitation for that waste source.
G. There shall be no discharge of polychlorinated byphenyl compounds
such as those commonly used for transformer fluid.
H. 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, other than chlorine, which may be toxic to aquatic life
and other than those previously reported to the Division of
Environmental Management. Such notificiation shall include:
Active ingredient(s) in the biocidal additives,
Dosage rate and frequency of application of the additives,
Discharge concentration of the active ingredient(s),
Discharge rate or volume,
Receiving stream (attach map locating discharge point), and
Aquatic toxicity data for each biocidal product (degradation
data, if available).
I. Continued intake screen backwash discharge is permitted without
limitations or monitoring requirements.
J. Nothing contained in this permit shall be construed as a waiver by
the permittee or any right to a hearing it may have pursuant to
State or Federal Laws or regulations.
R. The term "low volume waste sources" means the waste is taken
collectively as if from one source except those for which specific
limitations are otherwise established in this part. Low volume
wastes sources include but are not limited to: wastewaters from
wet scrubber air pollution control systems, ion exchange water
treatment system, water treatment evaporator blowdown, laboratory
and sampling streams, boiler blowdown, floor drains, cooling tower
basin cleaning wastes, and recirculating house service water
systems. Sanitary and air conditioning wastes are not included.
L. 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.
Metal cleaning will be conducted according to Duke Power's approved
equivalency demonstration.
M. The term "chemical metals 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.

Part III Continued
Permit No. RC0004961
N. It has been determined from information submitted that the plans
and procedures in place at Riverbend Steam Station are equivalent
to that of a BMP.
0. "Upset" means an exceptional incident in which there is
unintentional and temporary noncompliance with technology based
permit effluent limitations because of factors beyond the
reasonable control of the permittee. An upset does not include
noncompliance to the extent caused by operational error, improperly
designed treatment facilities, inadequate treatment facilities,
lack of preventive maintenance, or careless or improper operations.
P. Any discharge of domestic wastewater from the existing sand filter
treatment system constitutes an illegal bypass. An occurrence of
this type must be reported promptly to the Division of Enironmental
Management and corrected immediately.
Q. If the permittee, after monitoring for at least six months,
determines that he is consistently meeting the effluent limitations
contained herein, the permittee may request of the Director that
the monitoring requirements be reduced to a lesser frequency.
R. An assessment should be made of the existing groundwater quality in
the immediate vicinity of the dredge pond. If contaminants are
encountered at or below a depth of 20 feet, the vertical extent of
those contaminants should be established. This assessment should
be made prior to use of the dredge pond in order that background
groundwater quality can be established.
S. A similar assessment should, be made to establish groundwater
quality around the periphery of the existing ash ponds. Since
groundwater in the vicinity of the ponds will ultimately discharge
into the Catawba River, discovery of any contaminants in the GA
zone should lead to determine in which areas, at what depths and in
what concentrations those contaminants are entering the river. The
permittee should, within 90 days of permit issuance, submit to the
Department for approval a proposed plan to assess groundwater
quality at the existing fly ash basins. The plan should include
(a) a schedule for completion of each phase of the investigation
and (b) a proposed monitoring well network sufficient to detect any
contaminants which could reach the river.

�Y
i � P •��MwOy �w
CE,tVED �
> 'a � "State of North Carolina
Departmelt cWatural Resources and Community Development
Division of Environmental Management
Xwh Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor
S. Thomas Rhodes, Secretary
March 26, 1986
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr. B. K. Sipe
System Environmentalist
Duke Power Company
PO Box 33189
Charlotte, NC 28242
R. Paul Wilms
Director
Subject: Modification to NPDES
Permit No. NC0004961
Duke Power Company
Riverbend Steam Station
Gaston County
Dear Mr. Sipe:
On February 18, 1986, the Division of Environmental Management issued a
NPDES Permit to Duke Power Company. In accordance with a telephone
conversation with Mr. Wayne Pace on March 14, 1986, we are forwarding
herewith modifications to the subject permit. These modifications are
to modify the effluent pages (I3) for Outfall Nos. 001 and 002. Please
find amended pages I3 for Outfall Nos. 001 and 002. These pages should
be inserted into your permit. The old effluent pages for Outfalls Nos.
001 and 002 should be discarded. All other terms and conditions
contained in the original permit remain unchanged and in full effect.
This modification is issued pursuant to the requirements of North
Carolina General Statutes 143-215.1 and the Memorandum of Agreement
between North Carolina and the U. S. Environmental Protection Agency.
If any parts, measurement frequencies, or sampling requirements
contained in this permit are unacceptable to you, you may request a
waiver or modifications upon written demand to the Director within 30
days following receipt of this modification, identifying the specific
issues to be contended. The filing of this request will not affect your
right to request a hearing on these issues. Unless such demand is made,
this modification shall be final and binding.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Mr. B. K. Sipe
Page Two
�+ March 26, 1986
If you have any questions concerning this modification, please contact
Mr. Dale Overcash, 919/733-5083.
$incgr_el
ORIGIN'S � ':;5 U 5,
ARTHUR MOUBERRY
FOR
R. Paul Wilms
cc: Mr. Jim Patrick, EPA

A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on; -the effective date of the Permit and lasting until expiration,
permittee is authorized to discharge from outfall(s) serial number(s).001 Once through cooling water
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
Temperature oC(oF)
Residual Chlorine **
35(95)
THERE SHALL BE NO CHROMIUM, ZINC, OR COPPER ADDED TO THE COOLING WATER.
Monitoring Requirements
Measurement Sample * Sample
Frequency -Type Location
Daily Pump Log or Effluent
similar reading
Daily Grab Effluent
Weekly Grab Effluent
*The Regional Administrator has determined pursuant to Section 316(a) of the Act that the thermal component
of the discharge assures -the protection and propagation of a balanced, indigenous population of shellfish,
fish, and wildlife in andon the receiving body of water.
**Monitoring requirements only apply if. chlorine is added to the cooling water.
The permittee shall obtain authorization from the Division of Environmental Management prior to utilizing
any biocide in the cooling water (See Part III of this permit),
0 3,
�
ONO
r .
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on the effective date of the Permit and lasting until expiration, the
permittee is authorized to discharge from outfalI(s) serial number (s). 002. Ash Settling pond (with domestic
Such discharges shall be limited and monitored by the permittee as specified below: wastewater)
affluent Characteristics
Flow
Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
Total Suspended Solids 1/
Oil and Grease
Total Copper
Total Iron
Total Arsenic
Total Selenium
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Total Vanadium**
Monitoring Requirements
Measurement Sample Sample
Frequency Type Location
Weekly
Pump logs or
Effluent
Similar readings
30.0 mg/l
100.0 mg/l
2/Month
Composite
Effluent
15.0 mg/1
20.0 mg/l
2/Month
Grab
Effluent
1.0 mg/l
1.0 mg/l
2/Month
Composite
Effluent
1.0 mg/1
1.0 mg/l
2/Month
Composite
Effluent
470.0 Ug/1
2/Month
Composite
Effluent
47.0 ug/l
2/Month
Composite
Effluent
Monthly
Composite
Effluent
Monthly
Composite
Effluent
Quarterly
Composite
Effluent
*Effluent sampling shall be conducted at the discharge from the Ash Settling Pond prior to mixing with any other stream.
**Monitoring for Vanadium shall only be conducted for any quarter during which the generating plant is oil fired.
The metal cleaning waste, coal pile runoff, ash transport water, low volume waste, and domestic wastewater shall be
discharged into the Ash Settling Pond.
1/Daily average of 50
mg/l is permitted
provided
that the permittee can satisfactorily demonstrate that the
difference between 30
mg/1 and 50 mg/l
is due to
the concentration of total suspended solids in the source
body.
o fD -ws
Q J.
Cf Hi
F+ O
The pH shall not be
less than 6.0
standard
units nor greater than 9.0 standard units
and shall be monitored 2/Month by grab
samples at
the confluence of the discharge and the receiving waters.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

.i •
State of North Carolina
Department of Natural Resources and Community Development
Division of Environmental Management
512 North Salisbury Street * Raleigh, North Carolina 27611
James G. Martin, Governor February 18, 1986 R. Paul Wilms
S. Thomas Rhodes, Secretary Director
Mr. B. K. Sipe,
System Environmentalist
Duke Power Company
Fossil Production Department
P.O. Box 33189
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Charlotte, North Caro ink *Z*2oF NATURAL
RVRLot'�*RNIUBJECT: Modifications to NPDES
Co;,IUNt'rY D
Permit No. NC0004961
F:EB 1p46 Duke Power Company
Riverbend Steam Station
tea N1Al l;;A;;^GEMENi Gaston County
DIVISION tv Et1NIROd:,E
MpOWMIIIE AECIONAI OFFICE
Dear Mr. Sipe:
In accordance with your request for Permit modification received July 26, 1985,
we are forwarding herewith modifications to the subject permit. These modifications
eliminate outfall 003 to combine the domestic wastewater with the ash settling basin
(002) and include new monitoring requirements. All other terms and conditions
contained in the original permit remain unchanged and in full effect. These
modifications are 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.
If any parts, measurement frequencies, or sampling requirements contained
in this Permit are unacceptable to you, you may request a waiver or modifications
upon written demand to the Director within thirty (30) days following receipt of
this Permit, identifying the specific issues to be contended. The filing of this
request will not affect your rights to request a hearing on these issues. Unless
such demand is made, this Permit shall be final and binding.
If you have any questions concerning these modifications, please contact
Ms. Lisa Creech telephone number 919/733-5083.
Sincerely yours,
ORIGINAL SIGNED BY
,ARTHUR MOUBERRY
FOR
R. Paul Wilms
cc: Mr. Jim Patrick, EPA Pollution Prevention Pays
ndn©ro „ -
Rory�� � P.O. Box 27697, Raleigh, North Carolina 27611-7697 Telephone [phone]
LC/(]wt An Fr. A C)—rheniev Affi—.;..a A.- F....,I.,.,p.

Permit No. NC0004961
STATE OF NORTH CAROLINA
DEPARTMENT OF NATURAL RESOURCES S COMMUNITY DEVELOPMENT
DIVISION OF ENVIRONMENTAL MANAGEMENT
P E R M I T
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 Power Company
is hereby authorized to discharge wastewater from a facility located at
Riverbend Steam Station
Gaston County
to receiving waters designated as the Catawba River (Mountain Island Lake) in the
Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions
set forth in Parts I, II, and III hereof.
This permit shall become effective March 1, 1986.
This permit and the authorization to discharge shall expire at midnight on
August 31, 1989.
Signed this day of February 18, 1986.
ORIGINAL SIGNED BY
ARTHUR MOUBERRY
FOR
R. PAUL WILMS, DIRECTOR
DIVISION OF ENVIRONMENTAL MANAGEMENT
BY AUTHORITY OF THE ENVIRONMENTAL
MANAGEMENT COMMISSION
M1 E 11

Permit No. NC0004961
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1. Enter into a contract for construction of any additional wastewater
treatment facility necessary to comply with the final effluent
Limitations contained in this 'permit, and
2. After receiving an Authorization to Construct from the Division of
Environmental Management, construct and operate additional
wastewater treatment facilities necessary to comply with the final
effluent limitations contained in this permit; (See Part III of this
permit) , and
3. Discharge from said treatment works into the Catawba River (Mountain
Island Lake) which are classified Class "WS-III & B" waters in the
Catawba River Basin.

A. EFFLUENT LIMITATION AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration,
the permittee is authorized to discharge from outfall(s) serial number(s) 001, ONCE THROUGH COOLING
Such discharges shall be limited and monitored by the permittee as specified below: WATER
9ffluent Characteristics
Plow
Pemperature
tesidual Chlorine
Discharge Limitations
kg/day (lba/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
Monitoring Requirements
Measurement
Frequency
Weekly
** ** Weekly
***
*** Weekly
THERE SHALL BE NO CHROMIUM, ZINC, OR COPPER ADDED TO THE COOLING WATER
Sample *Sample
Type Location
Instantaneous E
Grab E,U,D
Grab E
*Sample locationst E - Effluent, U - Upstream, D - Downstream
**The temperature of the effluent %hall be such as not to cause an increase in the temperature of the
receiving stream of more than 2.8 C and in no case cause the ambient water temperature to exceed 32 C .
***Monitoring requirements only apply if chlorine is added to the cooling water.
The permittee shall obtain authorization from the Division of Environmental Management prior
to utilizing any biocide in the cooling water (See Part III of this Permit).
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be
monitored weekly at the effluent by grab samples
There shall be no discharge of floating solids or visible foam in other than trace amounts.
o �•
o^
tO o
0

A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the Permit and lasting until expiration, the
permittee is authorized to discharge from outfall(s) serial number(s).002, ASH SETTLING POND (WITH
Such discharges shall be limited and monitored by the permittee as specified below: DOMESTIC WASTEWATi
:ffluent Characteristics
Discharge Limitations
K /day (lbs/day)
Daily Avg. Daily Max.
Flow
Total Suspended Solids
Oil and Grease
Arsenic
Selenium
Total Nitrogen (NO 2+NO3+TKN)
Total Phosphorous
Monitoring Requirements
Other Units
(Specify)
Measurement
Sample
* Sample
Daily Avg.
Daily Max.
requency
—Ne
Localt-fon
5.98 MGD
Continuous
Recording
I or E
30.0 mg/1
100.0 mg/I
2/month
Composite
E
15.0 mg /I
20.0 mg /I
2/month
Grab
E
470.0 ug/I
2/month
Composite
E
47.0 ug/I
2/month
Composite
E
monthly
Composite
E
monthly
Composite
E
*Effluent sampling shall be conducted at the discharge from the Ash Settling Pond prior to mixing with any other stream.
I - Influent, E - Effluent
The metal cleaning waste, coal pile runoff, ash transport water, low volume waste, and domestic wastewater shall be discharged
into the Ash Settling Pond.
The pH shall not be less than 6.0 standard units nor greater than 9.o standard units
and shall be monitored daily by grab sample at the confluence of the discharge and the receiving water.
There shall be no discharge of floating solids or vigible foam in other than trace amounts.

Part I
Permit No. NC
B. SCHEDULE OF COMPLIANCE
1. The permittee shall achieve compliance with the effluent limitations
specified for discharges in accordance with the following schedule:
2. No later than 14 calendar days following a date identified in the above
schedule of compliance, the permittee shall submit either a report of
progress or, in the case of specific actions being required by identified
dates, a written notice of compliance or noncompliance. In the latter
case, the notice shall include the cause of noncompliance, any remedial
actions taken, and the probability of meeting the next scheduled requirement.
M46I4

Permit No. NC
Act used herein means the Federal Water Pollution Control Act, As amended.
DEM used herein means the Division of Environmental Management of the
Department of Natural Resources and community Development
"EMC" used herein means the North Carolina Environmental Management
Commission.
C. MONITORING AND REPORTING
1. Representative Sampling
Samples and measurements taken as required herein shall be representative
of the volume and nature of the monitored discharge.
2. Reporting
Monitoring results obtained during the previous month(s) shall be
summarized for each month and reported on a Monthly Monitoring Report
Form (DEM No. MR 1.0, 1.1, and 1.4) postmarked no.later than the 30th
day following the completed reporting period. The first report is due on
. The DEM may require reporting of additional monitoring
results by written notification. Signed copies of these, and all other
reports required herein, shall be submitted to the following address. -
Division of Environmental Management
Water Quality Section
Post Office Box 27687
Raleigh, North Carolina 27611
3. Definitions
a. The "daily average" discharge means the total discharge by weight
during a calendar month divided by the number of days in the month
that the production or commercial facility was operating. Where less
than daily sampling is required by this permit, the daily.average
discharge shall be determined by the summation of all the measured
daily discharges by weight divided by the number of days sampled
during the calendar month when the measurements were made.
b. The "daily maximum" discharge means the total discharge by weight
during any calendar day.
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to The EMC
regulations published pursuant to N. C. G. S. 143-215.63 et seq.. The
Water and Air Quality Reporting Act, Section 304(g), 13 USC 1314, of the
Federal Water Pollution Control Act, As Amended, and Regulation 40 CFR 136.
5. Recording Results
For each measurement or sample taken pursuant to the requirements of
this permit, the permittee shall record the following information:
15

PART I
Permit No. NC
a. The exact place, date, and time of sampling;
b. The dates the analyses were performed;
c. The person(s) who performed the analyses;
d. The analytical techniques or methods used; and
e. The results of all required analyses.
6. Additional Monitoring by Permittee
If the permittee monitors any pollutant at the location(s) designated
herein more frequently than required by this permit, using approved
analytical methods as specified above, the results of such monitoring
shall be included in the calculation and reporting of the values required
in the Monthly Monitoring Report Form (DEM MR 1.0, 1.1, 1.4)
Such increased monitoring frequency shall also be indicated. The DEM
may require more frequent monitoring or the monitoring of other pollu-
tants not required in this permit by written notification.
7. Records Retention
All records and information resulting from the monitoring activities
required by this permit including all records of analyses performed and
calibration and maintenance of instrumentation and recordings from
continuous monitoring instrumentation shall be retained by the permittee
for a minimum of three (3) years, or longer if requested by the State
Division of Environmental Management or the Regional Administrator of
the Environmental Protection Agency.
16

PART II
Permi t No. NC
A. MANAGEMENT REQUIREMENTS
1. Change in Discharge
All discharges authorized herein shall be consistent with the terms and
conditions of this permit. The discharge of any pollutant identified
in this permit more frequently than or at a level in excess of that
authorized shall constitute a violation of the permit. Any anticipated
facility expansions, production increases, or process modifications which
will result in new, different, or increased discharges of pollutants must
be reported by submission of a new NPDES application or, if such changes
will not violate the effluent limitations specified in this permit, by
notice to the DEM of such changes. Following such notice, the permit
may be modified to specify and limit any pollutants not previously limited.
2. Non compliance Notification
If, for any reason, the permittee does not comply with or will be unable
to comply with any effluent limitation specified in this permit, the per-
mittee shall provide the Division of Environmental Management with the
following information, in writing, within five (5) days of becoming aware
of such condition:
a. A description of the discharge and cause of noncompliance; and
b. -The period of noncompliance, including exact dates and times; or,
if not corrected; the anticipated time the noncompliance is expected
to continue, and steps being taken to reduce, eliminate and prevent
recurrence of the noncomplying discharge.
3. Facilities Operation
The permittee shall at all times maintain in good working order and
operate as efficiently as possible all treatment or control facilities
or systems installed or used by the permittee to achieve compliance with
the terms and conditions of this permit.
4. Adverse Impact
The permittee shall take all reasonable steps to minimize any adverse
impact to navigable waters resulting from noncompliance with any effluent
limitations specified in this permit, including such accelerated or
additional monitoring as necessary to determine the nature and impact of
the noncomplying discharge.
5. Bypassing
Any diversion from or bypass of facilities necessary to maintain compliance
with the terms and conditions of this permit is prohibited, except (i) where
M8&I7

PART II
Permit No. NC
unavoidable to prevent loss of life or severe property damage, or
00 where excessive storm drainage or runoff would damage any
facilities necessary for compliance with the effluent limitations
and prohibitions of this permit. The permittee shall promptly
notify the Water Quality Section of DEM in writing of each such
diversion or bypass.
6. Removed Substances
Solids, sludges, filter backwash, or other pollutants removed in the
course of treatment or control of wastewaters shall be disposed of in
a manner such as to prevent any pollutant from such materials from
entering waters of the State or navigable waters of the United States.
7. Power Failures
In order to maintain compliance with the effluent limitations and
prohibitions of this permit, the permittee shall either:
a. In accordance with the Schedule of Compliance contained in Part I,
provide an alternative power source sufficient to operate the waste-
water control facilities;
or,if such alternative power source is not in existence, and no date for
its implementation appears in Part I,
b. Halt, reduce or otherwise control production and/or all discharges
from wastewater control facilities upon the reduction, loss, or
failure of the primary source of power to said wastewater control
facilities.
8. Onshore or Offshore Construction
This permit does not authorize or approve the construction of any onshore
or offshore physical structures or facilities or the undertaking of any
work in any navigable waters.
I8

PART II
Permit No. NC
B. RESPONSIBILITIES
1. Right of Entry
The permittee shall allow the Director of the Division of Environmental
Management, the Regional Administrator, and/or their authorized represen-
tatives, upon the presentations of credentials:
a. The enter upon the permittee's premises where an effluent source is
located or in which any records are required to be kept under the
terms and conditions of this permit; and
b. At reasonable times to have access to and copy any records required
to be kept under the terms and conditions of this permit; to inspect
any monitoring equipment or monitoring method required in this permit;
and to sample any discharge of pollutants.
2. Transfer of Ownership or Control
This permit is not transferable. In the event of any change in control
or ownership of -Facilities from which the authorized discharge emanates
or is contemplated, the permittee shall notify the prospective owner or
controller by letter of the existence of this permit and of the need to
obtain a permit'in the name of the prospective owner. A copy of the
letter shall be.forwarded to*the Division of Environmental Management.
3. Availability of Reports
Except for data determined to be confidential under N. C. G. S. 143-215.
3(a)(2) or Section 308 of the Federal Act, 33 USC 1318, all reports prepared
in accordance with the terms shall be available for public inspection at the
offices of the Division of Environmental Management. As required by the Act,
effluent data shall not be considered confidential. Knowingly making any
false statement on any such report may result in the imposition of criminal
penalties as provided for in N. C. G. S. 143-215.6(b)(2) or in Section
309 of the Federal Act.
4. Permit Modification
After notice and opportunity for a hearing pursuant to N. C. G. S. 143-
215.1(b)(2) and G. S. 143-215.1(e) respectively, this permit may be
modified, suspended, or revoked in whole or in part during its term for
cause including, but not limited to, the following:
a. Violation of any terns or conditions of this permit;
b. Obtaining this permit by misrepresentation or failure to disclose
fully all relevant facts; or
c. A change in any condition that requires either a temporary or
permanent reduction or elimination of the authorized discharge.
M10&I9

PART II
Permit No. NC
5. Toxic Pollutants
Notwithstanding Part II, B-4 above, if a toxic effluent standard or
prohibition (including any schedule of compliance specified in such
effluent standard or prohibition) is established under Section 307(a)
of the Act for a toxic pollutant which is present in the discharge and
such standard or prohibition is more stringent than any limitation for
such pollutant in this permit, this permit shall be revised or modified
in accordance with the toxic effluent standard or prohibition and the
permittee so notified.
6. Civil and Criminal Liability
Except as provided in permit conditions on "Bypassing" (Part II, A-5)
and "Power Failures" (Part II, A-7), nothing in this permit shall be
construed to relieve the permittee from civil or criminal penalties for
noncompliance pursuant to N. C. G. S. 143-215.6 or Section 309 of the
Federal Act, 33 USC 1319.
7. Oil and Hazardous Substance Liability
Nothing in this permit shall be construed to preclude the institution
of any legal action or relieve the permittee from any -responsibilities,
liabilities, or penalties to which the permittee is or may be subject
under N. C. G. S. 143-215.75 et seq. or Section 311 of the Federal Act,
33 USC 1321.
8. Property Rights
The issuance of this permit does not convey any property rights in either
real or personal property, or any exclusive privileges, nor does it
authorize any injury to private property or any invasion of personal
rights, nor any infringement of Federal,State or local laws or regulations.
9. Severability
The provisions of this permit are severable, and if any provision of this
permit, or the application of any provision of this permit to any circum-
stance, is held invalid, the application of such provision to other cir-
cumstances, and the remainder of this permit shall not be affected thereby.
M 11 & I 10

PART II
Permit No NC
10. Expiration of Permit
+ Permittee is not authorized to discharge after the expiration date.
In order to receive authorization to discharge beyond the expiration
date, the permittee shall submit such information, forms, and fees as
are required by the agency authorized to issue permits no later than 180
days prior to the expiration date. Any discharge without a permit after
the expiration will subject the permittee to enforcement procedures as
provided in N. C. G. S. 143-215.6 and 33 USC 1251 et seq..
I 11

Part III
Permit No. NC 0004961
A. Previous Permits
All previous State water quality permits issued to this facility,
whether for construction or operation or discharge, are hereby revoked
by issuance of this permit. The conditions, requirements, terms, and
provisions of this permit authorizing discharge under the National
Pollutant Discharge Elimination System governs discharges from this
facility.
B. Construction
No construction of wastewater treatment facilities or additions thereto
shall be begun until Final Plans and Specifications have been submitted
to the Division of Environmental Management and written approval and
Authorization to Construct has been issued. If no objections to final
plans and specifications have been Bade by the Division of Environmental
Management within 60 days following acknowledgement that a complete set
of final plans and specifications has been received, the plans may be
considered approved and construction authorized.
C. Certified Operator
Pursuant to Chapter 90A of North Carolina General Statutes, the permittee
shall employ a certified wastewater treatment plant operator in responsible
charge of the wastewater treatment facilities. Such operator must hold a
certification of the grade equivalent to the classification assigned to
the wastewater treatment facilities.
D. Groundwater Monitoring
The permittee shall, upon written notice from the Director of the Division
of Environmental Management, conduct groundwater monitoring as may be
required to determine the compliance of this NPDES permitted facility
with the current groundwater standards.
E. In the event that waste streams from various sources are combined for
treatment or discharge, the quantity of each pollutant or pollutant property
attributable to each controlled waste source shall not exceed the specified
limitation for that waste source.
F. There shall be no discharge of polychlorinated byphenyl compounds such as
those commonly used for transformer fluid.
G. The company shall notify the Director in writing not later than sixty days
prior to instituting use of any biocide or chemical used in cooling systems,
including chlorine, which may be toxic to aquatic life other than those
previously reported to the Division of Environmr=ntal Management. Such
notification shall include:
Continued ....
M15 & I12

Co.. Continued
1. Name and general composition of biocide or chemical,
2. Proposed discharge concentrations,
3. Quantities to be used, and
4. Frequencies of use.
Part III
Permit No. NC00049!
H. Continued intake screen backwash discharge is permitted without limitations or
monitoring requirements.
I. 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.
This permit shall be modified, or alternatively, revoked and reissued to comply with
any applicable effluent standard or limitation issued or approved under Section 301(b)
(2) (C), and (D), 304(b) (2), and 307(a) (2) of the Clean Water Act, if the effluent
standard or limitation so issued or approved:
I. Contains different conditions or is 'otherwise more stringent than any
effluent limitation in the permit; or
2. Controls any po:lutant not limited in the permit.
The permit as modified or reissued under this paragraph shall also contain any
other requirements of the Act then applicable.
K. The term "low volume waste sources" means, taken collectively as if from one
source, wastewater from all sources except those for which specific limitations
are otherwise established in this part. Low volume wastes sources include,
but are not limited to: Wastewaters from wet scrubber air pollLtion control
systems, ion exchange water treatment system, water treatment evaporator
blowdown, laboratory and sampling streams, boiler blowdown, floor drains,
cooling tower basin cleaning wastes, and recirculating house service water
systems. Sanitary and air conditioning wastes are not included.
L. The term "metal cleaning waste" means any wastewater resulting from cleaning
(with or without chemical cleaning compounds) any metal process equipment
including, but not limited to, boiler tube cleaning, boiler fireside cleaning,
and air preheater cleaning. Metals cleaning wilFbe conducted according to
Duke Power's approved equivalency demonstration.
M. The term "chemical metals 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.
N. It has been determined from information submitted that the plans and
procedures in place at Riverbend Steam Station are equivalent to that
of a BMP.
O. "Upset" means an exceptional incident in which there is unintentional and
temporary non-compliance with technology based permit effluent limitations
because of factors beyond the reasonable control of the permittee. An
Continued ...

O. Continued.
Part I I I
Permit No. N C 000496
upset does not include noncompliance to the extent caused by operational
error, improperly designed treatment facilities, inadequate treatment
facilities, lack of preventive maintenance, or careless or improper operations.
P. Any discharge of domestic wastewater from the existing sand filter treatment
system constitutes an illegal bypass. An occurrence of this type must be
reported promptly to the Division of Environmental Management and corrected
immediately.
Q. If the permittee, after monitoring for at least six months, determines that
he is consistently meeting the effluent limits contained herein, the permittee
may request of the Director that the monitoring requirements be reduced to
a lesser frequency.

1
MEMORANDUM TO: Arthur Mouberry
FROM:
PREPARED BY:
SUBJECT:
DIVISION OF ENVIRONMENTAL MANAGEMENT
October 7, 1985
D. Rex Gleason
J. Thurman Ho e
Application Permit Revision
Duke Power Company-Riverbend Station
NPDES Permit No. NC 0004691
Gaston County, North Carolina
The staff of the Mooresville Regional Office has reviewed the attached
letter dated July 26, 1985 from Mr. S. B. Hager, Duke Power Company. The
letter details Duke's proposal to construct a new dry flyash landfill and to
make a new outlet to surface waters.
The proposed landfill will be located adjacent to the existing settling
basins. Sludge from the existing settling basins will be dredged and placed
in a proposed dredge pond (Authorization to Conssued August 5, 1985).
Here the sludge will be dewatered by draining the water back into the existing
(permitted) settling basins. The dried sludge will then be removed and disposed
in the proposed landfill.
Actual landfilling activities will take place infrequently and only as is
necessitated by the filling of the settling basins. Duke estimates that this
may occur once every several years. When the need arises to clean the settling
basins, the dredging dewatering procedure will be implemented. Duke estimates
that the procedure of removing and landfilling the dewatered sludge may take
from two to five weeks. During this period of landfilling, the landfill would
remain "open" and vulnerable to any rainfall. After completion of the landfill
procedure the sludge will be covered with a suitable layer of soil and planted
with grass.
In conjunction with the proposed landfill, Duke proposes to construct
an earthen settling basin which will collect runoff from the landfill and
surrounding drainage area and discharge to Mtn. Island Lake.(Catawba River)
via a new proposed outlet. The outlet will discharge whenever there is a
sufficient accumulation of runoff to affect an overflow.
In Duke's letter, they have noted that they do not feel this proposed
discharge is of the same significance that the existing permitted discharge
is and as such, should not be subject to the same monitoring requirements.
We have met with Duke and discussed our concerns and we have reached a tentative

s
Arthur Mouberry
Page Two
October 7, 1985
agreement on what would be reasonable and acceptable monitoring requirements.
Attached is a suggested draft "Effluent Limitations and Monitoring Requirements"
Page (without the effluent limitations) which reflect these suggested monitoring
requirements and conditions.
The Mooresville Regional Office recommends that the subject Permit be
amended as requested to allow the construction of a settling basin to serve
the proposed landfill and to operate an outlet from this facility in accordance
with the requirements detailed in the attachment.
Please note that effluent limitations should be added as appropriate
for this industry and as suggested by Technical Services.
Attached is a copy of our memo dated June 25, 1985 which refers to Duke's
earlier request to amend the subject Permit by eliminating the existing
domestic wastewater discharge (outlet 003).
It is recommended that both of the requested revisions be taken care of
with one permit amendment. The new permit should list three (3) outlets as
described below:
1. Outlet 001 - Once Through Cooling Water
2. Outlet 002 - Ash Settling Pond Discharge
3. Outlet 003 - Sludge Landfill Settling Basin Discharge
Attached is a Staff Report and Recommendations which provides additional
information pertinent to revising this Permit.
If you have any questions or need any additional information, please
advise.
Attachment
JTH:se

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning on the effective date of the Permit and lasting until expiration, the
permittee is authorized to discharge from outfall(s) serial number(s)003-sludge/landfill settling pond.
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
Oil and Grease
Total Suspended Solids
Total Copper
Total Iron
Total Arsenic
Total Selenium
Total Vanadium**
pH
Discharge Limitations Monitoring Requirements
Kg/day (lbs/day) Other Units (Specify) * Measurement Sample Sample
Daily Avg. Daily -Max. Daily Avg. Daily Max. �"—uenc
y e Location
Weekly Instantaneous E
2/Year Grab E
2/Year Grab E
2/Year Grab E
2/Year Grab E
Annually Grab E
Annually Grab E
Annually Grab E
2/Year Grab E
kDuring all periods of active landfill activity, the measurement frequency shall be increased as follows:
Flow - Daily
Oil & Grease, Total Suspended Solids, Total Copper, Total Iron and pH - Weekly
Total Arsenic, Total Selenium and Total Vanadium - Bi-Weekly
Active landfill activity shall be considered to include, but not be limited to, any significant land disturbing
activities including placement of sludge, compaction and final grading. The period of active landfill activity shall
generally be considered to last until final grading of top cover soil and planting of vegetative cover have been
completed.
a C+
C+
The pH shall not be less than 6.0 standard units nor greater than 9.o standard units
and shall be monitored as indicated above.
4
j
There shall be no discharge of floating solids or visible foam in-nr_har.+,kan .+wb%--

K
WATER QUALITY STAFF REPORT AND RECOMMENDATIONS
Part I - INSPECTION OF PROPOSED/EXISTING SLUDGE DISPOSAL SYSTEM
1. a. Place visited: Duke Power Company-Riverbend Steam Station
b. Mailing Address: Post Office Box 33189
Charlotte, North Carolina 28242
Gaston County
2. Date of Investigation: 6/11/85 Dat of Report: 10/4/85
3. By: J. Thurman Horne, P. E. +-
4. a. Person contacted: Mr. D id Roche
b. Phone No.: 704/373-8775
5. Directions to site: The Riverbend Steam Station is located on the
west bank of the Catawba River (Mtn. Island Lake) just north of the
Highway 16 crossing.
6. a. The coordinates to the proposed/existing point of effluent
discharge are: 3 4 � C 35, � �(
3 too.
Exist . 001 Exist. 002 Exist %03 Prop . 003
Latitude: 35021'25" 35022'10" 35021'40" 35022'00"
Longitude: 80058'10" 80057'35" 80058'30" 80057'20"
b. USGS Quad No.: F15SW (see attached map)
7. Size (land available for expansion and upgrading): Duke Power
Company owns several hundred acres at this site. There is adequate
land available for the proposed modifications.
8. Topography: Rolling; slopes of 3-10%.
9. Location of nearest dwelling: None within 1000 feet of the existing
and proposed settling basins.
10. Receiving Stream: Mtn. Island Lake (Catawba River)
a. Classification: A -II & B
b. Minimum 7-Day, 10-Year discharge at site:
c. River Basin and Sub -Basin No.: 03-08-33
Part II - DESCRIPTION OF PROPOSED/EXISTING TREATMENT FACILITIES
1. Existing Facilities: The existing facilities serve to treat the waste-
water generated from the production of electricity in a coal fired
(oil standby) power plant. Domestic wastewater is treated in a 10,000
gpd facility consisting of a septic tank, sand filter and effluent
chlorination. The effluent is discharged into the cooling water
intake canal (a portion of Mtn. Island Lake).

Page Two
Bottom ash and flyash generated from the combustion of coal along with
*metal cleaning wastewater are discharged into two ash settling
basins (in series). The ash settling basins, in turn, discharge into
Mtn. Island Lake (Catawba River). Note: Only one discharge outlet
serving the two ash settling basins.
Non -contact boiler cooling water is discharged through an effluent
canal into Mtn. Island Lake.
*Metal Cleaning is accomplished using the following chemicals:
1.
Ammonia hydroxide
6.
Citric acid
2.
Hydrochloric acid
7.
Sodium bromate
3.
Ammonium carbonate
8.
Ammonium bifluoride
4.
Soda ash
9.
Copper complexer
5.
Trisodium phosphate
2. Proposed Modifications: See attached memo to Arthur Mouberry dated
October 7, 1985.
Part III - EVALUATION AND RECOMMENDATIONS
1. Performance Evaluation: The existing facilities have a consistent
history of compliance with the existing Permit limitations. The
proposed facilities appear to be adequate for their intended purpose.
2. 0 & M Evaluation: The existing facilities appear to be properly
operated and maintained.
3. Recommendations and/or Special Conditions: See attached memo to
Arthur Mouberry dated October 7, 1985.
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EaEIVED
OF ENVIKINMENTAL MANABEMFAb
UDR '� '5 State of North Carolina
Dep t't nt of Nal tural Resources and Community Development
E V LE
e Salisbury Street • Raleigh, North Carolina 27611
James G. Martini, Governor Division of Environmental Management S. Thomas Rhodes, Secretary
August 5, 1985
Mr. S. B. Hager, Chief Engineer
Civil -Environmental Division
Duke Power Company
P.O. Box 33189
Charlotte, NC. 28242
SUBJECT: Permit No. NC0004961
Authorization to Construct
Riverbend Steam Station
Ash Basin Sludge Pond
Gaston County
Dear Mr. Hager:
A letter of request for Authorization to Construct was received April 18,
1985, by the Division and final plans and specifications for the subject project
have been reviewed and found to be satisfactory. Authorization is hereby
granted for the construction of a wastewater treatment facility consisting of
a 75,000 cubic yard capacity holding basin with earthen berms, compacted soil
bottom and rip -rap drainage structure for the storage of sludge removed from
the existing ash basins at Duke Power Company's Riverbend Steam Station.
This Authorization to Construct is issued in accordance with Part III
paragraph C of NPDES Permit No. NC0004961 issued August 31, 1984, and shall
be subject to revocation unless the wastewater treatment facilities are con-
structed in accordance with the conditons and limitations specified in Permit.
No. NC0004961.
The sludge generated from these treatment facilities must be disposed of in
accordance with G. S. 143-215.1 and in a manner approvable by the North Carolina
Division of Environmental Management.
The Mooresville Regional Office, telephone number 704-663-1699 shall be
notified at least twenty-four (24) hours in advance of filling of the installed
sludge pond so that an in -place inspection can be made of said pond prior
to filling. Such notification to the Regional Supervisor shall be made during the
normal office hours from 8:00 A.M. until 5:00 P.M. on Monday through Friday,
excluding State Holidays.
P.O. Box 27687, Rakish, North Carolina 27611-7697 Telephone [phone]
An Equal Opportunity / Affirmative Action Employer

ie facilities fail to perform satisfactorily in meeting it),-s
NPDES permit effluent limits, the Permittee shall take such immediately corrective
action as may be required by this Division, including the construction of
additional wastewater treatment and disposal facilities.
Freeboard in the sludge pond shall not be less than two (2) feet at any
time.
No type of sludge other than that from the existing Riverbend Steam
Station ash basins shall be placed in the sludge pond.
The earthen berms around the sludge pond shall be adequately stabilized
with grass.
All Wastewater from the sludge pond shall be drained back into the existing
ash basins prior to stream discharge.
No sludge or related waste shall be placed in the subject facility without
written authorization from the Division of Environmental Management to
operate and utilize the sludge pond.
Necessary precautionary measures shall be taken to prevent infiltration
or spillage of any sludge or fluid effluent from the existing ash basins from
entering the sludge pond until the required operating authorization has been
granted.
One (1) set of approved plans and specifications is being forwarded to you.
If you have any questions or need additional information, please contact Mr.
Robert Teulings, telephone number 919/733-5083, ext 121.
Sincerely yours,
Original Signed By
ARTHUR MOUBERRY
For:
R. Paul Wilms
Director
cc: Gaston County Health Department
Mr. Dennis R. Ramsey
Mooresville Regional Supervisor
RT/ad

Pr
DIVISION OF ENVIRONMENTAL MANAGEMENT
June 25, 1985
MEMORANDUM TO: Arthur Mouberry
FROM: D. Rex Gleason
PREPARED BY: J. Thurman Horne.
SUBJECT: Request for erm Amendment
Duke Power m ny
Riverbend Steam Station
NPDES Permit No. NC 0004961
Gaston County
Attached is a letter from Mr. B. K. Sipe, System Environmentalist, Duke
Power Company, requesting an amendment to the subject permit. Mr. Sipe requests
that the permit be amended to allow Duke to eliminate the existing domestic
discharge (outfali 003) by piping the existing domestic wastewater to the inlet
to the existing ash settling pond (outfall 002).
In the past this action has been approved for other Duke facilities such as
Allen Steam Station in Gaston County.
The staff of the Mooresville Regional Office have reviewed Duke's request
and recommend that it be approved and that the permit be amended as requested.
Please note that on the second page of the letter, item 5, indicates that
in the rare event of a power failure, the domestic wastewater would go thru the
sand filter and be discharged thru the existing outlet 003. Duke is aware that
if the permit is amended as requested such an event would constitute an unpermitted
discharge and would be subject to possible enforcement action.
Therefore, it is recommended that the amended permit contain a special
condition stating that any such discharge will constitute an illegal bypass and
must be reported promptly and corrected as soon as possible.
If you have any questions or need any additional information, please advise.
JTH: s j u
Attachment

�JJ DUKE POWER COMPANY
FOSS$. PRODUCTION DEPARTMENT
P.O. BOX 33189, 422 SOUTH CHURCH STREET
CHARLOTTE, N.G. 26242
:coact:; lii .'r.:�l;�k�:'t.'s.l! �►a�h.4:.�1q�' [phone]
t, r'
r.
June 5, 1985 "
Mr. D. Rex Gleason, P. E.
Water Quality Regional Engineer
Department of Natural Resources
and Community Development
Mooresville Regional Office
919 North Main Street
P. O. Box 950
Mooresville, North Carolina 28115-0950
Subject: Riverbend Steam Station, NC 0004961
Sanitary Treatment System
Proposed Rerouting
File: RB-702.10
Dear Mr. Gleason:
Riverbend's current NPDES permit allows for discharge of its
domestic treatment (003) to the station intake. In an
effort to simplify and assure compliance with both State and
EPA waste treatment programs, Duke Power requests approval
of a change to the existing system. Six of Duke's eight
fossil stations already have their sanitary treatment
systems routed to ash basins for final treatment before
discharge.
The proposed new system will consist of primary treatment in
the existing 3000 gallon septic tank followed by secondary
treatment and disinfection in the ash basin treatment
system. This treatment scenario which has been permitted at
two other Duke Power stations is documented in the attached
report.
The flush tank attached to the 3000 septic tank (see
attachment) will be used as a pump chamber. Dual pumps
capable of handling the effluent from the septic tank will
be used to pump this stream into the yard drainage system.
The yard drains are then collected and pumped to the ash
basin for further treatment.
Modifications to the flush tank will include the following:
1. The two siphon bells will be removed from the
flush tank. A removable plug will be used to plug
each line inside the flush tank.
2. Dual sewerage pumps will be located within the

Pr
Mr. D. Rex Gleason, P. E.
June 5, 1985
Page 2
flush tank in the vicinity where the siphon bells
were located.
3. Level controls with a high -high -low capability
will be used to operate the pumps.
4. The high -high level control will be used to
operate the backup pump in case of pump failure.
5. In case of a power failure an overflow from the
flush tank will be treated through the sand
filter.
6. A third pump and spare parts will be available as
required.
7. Freeze protection will not be be required because
the waste volume within the pipe will drain back
to the flush tank when pumping is stopped.
If additional information or further clarification is needed
regarding this request, please contact L. Wayne Pace, (704)
373-8761.
Very truly yours,
B. K. Sipe
System Environmentalist
Fossil Environmental Compliance
LWP/gw
Attachment

Flyash Treatment of Sanitary Wastewaters
The effluent of domestic wastewater treatment systems at several Duke Power
Company Steam Stations have been routed to ash basins. The purpose for
routing the discharge to an ash basin is to 1) provide additional treatment
for the domestic waste treatment system effluent, 2) provide permanent
disposal of solids, and 3) eliminate the need for biocide feed which will
eliminate biocidal reaction products being discharged to the receiving
waters. An ash basin equivalency study was conducted to verify the
treatability of domestic wastewaters with flyash.
The dissimilarities between the domestic wastewater and ash basin water are
so insignificant that it is impractical to track the domestic wastewater within
the ash basin. A literature review and laboratory bench study was therefore
performed to verify treatment. A review of the literature revealed no direct
application for utilizing operating ash basins as a means to treat sanitary
waste. However, available literature citations did indicate the chemical and
physical properties of flyash are capable of providing treatment of raw sanitary
wastes.
Tenney and Echelbergerl have documented the use of flyash for the treatment
and renovation of various polluted waters. They report certain properties
and characteristics of flyash make this material useful in the treatment of
eutrophic lakes, sewage plant sludge, and acid mine wastes containing excessive
quantities of acid and soluble iron. Clark and Othmer2 have also noted flyash
obtained from electrostatic precipitators can be used in water treatment
processes. Flyasil can increase the rate of floc growth, enhance floc settling
properties, precipitate phosphates and absorb organic molecules from waste
waters. Tossey, Fleming and Scott3 have shown lime, alum, silica, and
ferric sulfate - major constituents in flyash - significantly reduce suspended
solids, BOD, and phosphates in a secondary -treated effluent. Alumina and
carbon, the other major flyash constituents not studied by Tossey et. al,
are also routinely used for separating and isolating organic molecules.
The combined treatment capabilities of the constituents of flyash will treat
domestic waste waters to permit limits within the ash basin. The retention
time within the ash basin provides for clarification of suspended solids
associated with sanitary wastes and other waste streams. Removal of fecal
organisms is accomplished by sorption on flyash particulates. Even though
the literature does not report a kill of the fecal organisms, treatment and
disposal of these pollutants is accomplished as a result of fresh ash covering
over the ash previously used for treatment.
The results of bench studies confirm the treatment capabilities of flyash
when treating sanitary wastes:

BODS Studv
BOD5 Before
Treatment Treatment, mg/1
2000 mi. of raw sanitary wastes 63.0
from McGuire Nuclear Station
mixed with 1000 grams of flyash,
stirred for 30 minutes, and then
settled.
Reduction = 92.7%
Fecal Coliform Studv
Treatment
Fecal Coliform
Before Treatment
Coliforms/100 mi.
Control - 1000 grams of flyash --
mixed with 5 liters of demineralized
water for 15 minutes, then allowed
to settle.
Initial Sample - Raw wastes from 526
Marshall Steam Station
Treatment A - 1000 grams of 526
flyash mixed with 5 liters of raw
wastes from Marshall Steam Station
for 15 minutes, then allowed to
settle.
Treatment B - 1500 grams of 526
flyash mixed with 5 liters of
raw wastes from Marshall Steam
Station for 15 minutes, then
allowed to settle.
X Reduction for Treatment A = 98.8%
X Reduction for Treatment B = >99.8X
BOD5 After
Treatment, mg/1
4.6
Fecal Coliform
After Treatment
Coliform/100 mi.
<1
M
<1
Within the ash basins, flyash and contact time exceeds greatly the amounts
utilized to show treatment of domestic wastes with flyash; the treated organics
will be permanently disposed by being covered with new ash. Therefore, active
ash basins will provide treatment equivalent to or greater than secondary
treatment of domestic wastewaters.

References
1. Tenney, M. W. and W. F. Echelberger, Jr. Bureau of Mines Information
Circular 8488, Ash Utilization Proceedings, 1970, pp. 237-265.
2. Clark, J. R. and D. F. Othmer, A Simple Total Sewage Treatment,
Advances in Separation Techniques - Coagulation, Sedimentation,
Adsorption. Pres. 70th National Meeting, American Institute of
Chemical Engineers, Nov. 1973.
3. Tossey, D., P. J. Fleming and R. F. Scott. ASCE Journal of Sanitary
Engineering Division, V96 n SA1 February 1970, paper 7106, p. 75-90.

DIVISION OF
' ENVIRONMENTAL
North l I Carolina Department off Natural MANAGEMENT
Robert F. Helms
g Resources & Community Development Director
James B. Hunt, Jr., Governor �.Tt5ttnes A. Summers, Secretary Telephone [phone]
G 1) ryAii'gu `t­ SL - 1984
�• 'O-SvO
Mr. William Parker CO 4 )29A
Duke Power Company SV-
422 S. Church St. *t otwo
Charlotte, NC 28242 ,Eti(A� piva
5�SLTBJEC^- : Pewit Nc . NC0004961
Duke Power Company - Riverbend
Gaston County
Dear Mr. Parker:
In accordance with your application for discharge permit received December 2, 1980,
we are forwarding herewith the subject State-NPDES Permit. This Permit is
_ issued pursuant to the requirements of North Carolina General Statute 143-215.1
and the Memorandum of Agreement between North Carolina and the U.S. Environmental
Protection Agency dated December 6, 1983.
If any parts, requirements, or limitations contained in this Permit are unaccept-
able to you, you have the right to an adjudicatory, hearing before a hearing offi-
cer upon written demand to the Director within 30 days following receipt of this
Permit, identifying the specific issues to be contended. Unless such demand is
made, this Permit shall be final and binding.
Please take notice that this Permit is not transferable. Part II, B.2. addresses
the requirements to be followed in case of change in ownership or control of this
discharge.
This Permit does not affect the legal requirement to obtain other Permits which
may be required by the Division of Environmental Management. If you have any
questions concerning this Permit, please contact Mr. David Adkins at telephone
number 919/733-5083.
Sincerely yours,
Original Signed Sy
FORREST R. WESTALL
FOR
Robert F. Helms
cc: Mr. Jim Patrick, EPA
Attachment
P O. Box 27687 Raleigh, N. C. 27611-7687
An Equal Opportunity Affirmative Action Employer

Permit No.. NC 0004961
STATE OF NORTH CAROLINA
DEPARTMENT OF NATURAL RESOURCES & COMMUNITY DEVELOPMENT
DIVISION OF ENVIRONMENTAL MANAGEMENT
P E R M I T
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 Power Company
is hereby authorized to discharge wastewater from a facility located at
Riverbend Steam Station
Gaston County
to receiving waters designated the Catawba River in the Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, and III hereof.
This permit shall become effective September 1, 1984
This permit and the authorization to discharge shall expire at midnight
on August 31, 1989
Signed this day of August 31, 1984
Original Signed BY
FORREST R. WESTALL
Robert F. Helms, Director
Division of Environmental Management
By Authority of the Environmental
Management Commission

Permit No. NC0004961
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1. Enter into a contract for construction of any additional waste-
water treatment facility necessary to comply with the final
effluent limitation contained in this permit, and
2. After receiving an Authorization to Construct from the Division
of Environmental Management, construct and operate additional
wastewater treatment facilities necessary to comply with the
final effluent limitations contained in this permit, and
tinue to operate and maintain the existing wastewater treatment
facility located at the Riverbend Steam Electric Generating
Plant (See Part III of this permit), and
3. Discharge from said treatment works into the Catawba River
which is classified Class "A -II" waters.

A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on the effective date of the Permit and lasting until expiration, the
permittee is authorized to discharge from outfall(s) serial number(s) 001, Once Through Cooling Water.
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg_ Daily Max. Daily Avg. Daily Max.
Flow
Temperature oC(oF) *
35(95)
Monitoring Requirements
Measurement Sample ** Sample
Frequency Type Location
Daily Pump log or E
similar reading
Daily Grab E
*The Regional Administrator has determined pursuant to Section 316(a) of the Act that
the thermal component of the discharge assures the protection and propagation of.a
balanced, indigenous population of shellfish, fish, and wildlife in and on the receiving
body of water.
-s
J.
**E - Effluent `t
z
0
- z
c�
0
There shall be no discharge of floating solids or visible foam in other than trace amounts. �
rn
a
-s
Ct
...

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge from outfall(s) serial number(s).002 Ash Settling pond discharge
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg_ Daily Max.
Oil and Grease
Total Suspended Solids 1/
Total Copper
Total Iron
Total Arsenic
Total Selenium
Total Vanadium**
p}1
15 mg/1
30 mg/I
1000 tig/ I
1000 jig/ 1
20 mg/1
100 mg/1
1000 li g/ l
1000 li 1;/ 1
Monitoring Requirements
Measurement
Sample
*Sample
Frequency
Type
Logan
Weekly
Pump logs or
Effluent
Similar readings
2/Month
Grab
Effluent
2/Month
Grab
Effluent
2/Month
Grab
Effluent
2/Month
Grab
Effluent
Quarterly
Grab
Effluent
Quarterly
Grab
Effluent
Quarterly
Grab
Effluent
241onth
Grab
Effluent
*Effluent sampling shall be conducted at the discharge from the ash settling pond prior
to mixing with any other waste stream,'except for pil which shall be sampled at the
confluence of the discharge and the receiving water.
**Monitoring for vanadium shall only be conducted for any quarter during which the generating
plant is oil fired.
The metal cleaning waste, coal pile runoff, ash transport water, and low volume waste shall
be discharged into the ash settling pond.
1/ Daily average of 50 mg/l is permitted provided permittee can satisfactorily demonstrate that
the difference between 30 mp,/l and 50 mg/l is due to the concentration of total suspended solids
in the source body.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
and shall be monitored as indicated above.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

3
w
A. (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on the effective date of the Permit and lasting until expiration,
the permittee is authorized to discharge from outfall(s) serial number(s) 03 domestic (discharge to intake
Such discharges shall be limited and monitored by the permittee as specified below: canal)
Effluent Characteristics
Flow
BOD, 5day, 200C
TSS
Discharge Limitations
Kg/dayKg/day lbs da
Monthly Avg. Week y Avg.
Fecal Coliform (geometric mean)
Other -Units (Specify)
Monthly AVq. WeeKlY vg.
0.010 MGD
30 mg/l 45 mg/l
30 mg/l 45 mg/1
1000/100 ml 2000/100 ml
Monitoring Requirements
Measurement
Frequency
2/Month
2/Month
2/Month
2/Month
SaTy
pe__
Instantaneous
Grab
Grab
Grab
*Effluent samples shall be collected at the point of discharge prior to mixing with any
other waste stream.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and
shall be monitored 2/Month at the effluent by grab samples.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
* Sample
Location
Effluent
Effluent
Effluent
Effluent
z -o -v v
c1) M cu a
o
o
'-' 0

Part I
Permit No. NC
B. SCHEDULE OF COMPLIANCE
1. The permittee shall achieve compliance with the effluent limitations
specified for discharges in accordance with the following schedule:
2. No later than 14 calendar days following a date identified in the above
schedule of compliance, the permittee shall submit either a report of
progress or, in the case of specific actions being required by identified
dates, a written notice of compliance or noncompliance. In the latter
case, the notice shall include the cause of noncompliance, any remedial
actions taken, and the probability of meeting the next scheduled requirement.
M4&I4

PART I
Permit No. NC
Act used herein means the Federal Water Pollution Control Act, As amended.
DEM used herein means the Division of Environmental Management of the
Department of Natural Resources and Community Development
"EMU used herein means the North Carolina Environmental Management
Commission.
C. MONITORING AND REPORTING
1. Representative Sampling
Samples and measurements taken as required herein shall be representative
of the volume and nature of the monitored discharge.
2. Reporting
Monitoring results obtained during the previous month(s) shall be
summarized for each month and reported on a Monthly Monitoring Report
Form (DEM No. MR 1.0, 1.1, and 1.4) postmarked no -later than the 45th
day following the completed reporting period. The first report is due on
. The DEM may require reporting of additional monitoring
results by written notification. Signed copies of these, and all other
reports required herein, shall be submitted to the following address:
Division of Environmental Management
Water Quality Section
Post Office Box 27687
Raleigh, North Carolina 27611
3. Definitions
a. The "daily average" discharge means the total discharge by weight
during a calendar month divided by the number of days in the month
that the production or commercial facility was operating. Where less
than daily sampling is required by this permit, the daily average
discharge shall be determined by the summation of all the measured
daily discharges by weight divided by the number of days sampled
during the calendar month when the measurements were made.
b. The "daily maximum" discharge means the total discharge by weight
during any calendar day.
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to The EMC
regulations published pursuant to N. C. G. S. 143-215.63 et seq.. The
Water and Air Quality Reporting Act, Section 304(g), 13 USC 1314, of the
Federal Water Pollution Control Act, As Amended, and Regulation 40 CFR 136.
5. Recording Results
For each measurement or sample taken pursuant to the requirements of
this permit, the permittee shall record the following information:
15

PART I
Permit No. WC
a. The exact place, date, and time of sampling;
b. The dates the analyses were performed;
c. The person(s) who performed the analyses;
d. The analytical techniques or methods used; and
e. The results of all required analyses.
6. Additional Monitoring by Permittee
If the permittee monitors any pollutant at the location(s) designated
herein more frequently than required by this permit, using approved
analytical methods as specified above, the results of such monitoring
shall be included in the calculation and reporting of the values required
in the Monthly Monitoring Report Form (DEM MR 1.0, 1.1, 1.4)
Such increased monitoring frequency shall also be indicated. The DEM
may require more frequent monitoring or the monitoring of other pollu-
tants not required in this permit by written notification.
7. Records Retention
All records and information resulting from the monitoring activities
required by this permit including all records of analyses performed and
calibration and maintenance of instrumentation and recordings from
continuous monitoring instrumentation shall be retained by the permittee
for a minimum of three (3) years, or longer if requested by the State
Division of Environmental Management or the Regional Administrator of
the Environmental Protection Agency.
16

PART II
Permit No. NC
A. MANAGEMENT REQUIREMENTS
1. Change in Discharge
All discharges authorized herein shall be consistent with the terms and
conditions of this permit. The discharge of any pollutant identified
in this permit more frequently than or at a level in excess of that
authorized shall constitute a violation of the permit. Any anticipated
facility expansions, production increases, or process modifications which
will result in new, different, or increased discharges of pollutants must
be reported by submission of a new NPDES application or, if such changes
will not violate the effluent limitations specified in this permit, by
notice to the DEM of such changes. Following such notice, the permit
may be modified to specify and limit any pollutants not previously limited.
2. Non compliance Notification
If, for any reason, the permittee does not comply with or will be unable
to comply with any effluent limitation specified in this permit, the per-
mittee shall provide the Division of Environmental Management with the
following information, in writing, within five (5) days of becoming aware
of such condition:
a. A description of the discharge and cause of noncompliance; and
b. The period of noncompliance, including exact dates and times; or,
if not corrected; the anticipated time the noncompliance is expected
to continue, and steps being taken to reduce, eliminate and prevent
recurrence of the noncomplying discharge.
3. Facilities Operation
The permittee shall at all times maintain in good working order and
operate as efficiently as possible all treatment or control facilities
or systems installed or used by the permittee to achieve compliance with
the terms and conditions of this permit.
4. Adverse Impact
The permittee shall take all reasonable steps to minimize any adverse
impact to navigable waters resulting from noncompliance with any effluent
limitations specified in this permit, including such accelerated or
additional monitoring as necessary to determine the nature and impact of
the noncomplying discharge.
5. Bypassing
Any diversion from or bypass of facilities necessary to maintain compliance
with the terms and conditions of this permit is prohibited, except (i) where
M8&I7

PART II
Permit No. NC
unavoidable to prevent loss of life or severe property damage, or
(ii) where excessive storm drainage or runoff would damage any
facilities necessary for compliance with the effluent limitations
and prohibitions of this permit. The permittee shall promptly
notify the Water Quality Section of DEM in writing of each such
diversion or bypass.
6. Removed Substances
Solids, sludges, filter backwash, or other pollutants removed in the
course of treatment or control of wastewaters shall be disposed of in
a manner such as to prevent any pollutant from such materials from
entering waters of the State or navigable waters of the United States.
7. Power Failures
In order to maintain compliance with the effluent limitations and
prohibitions of this permit, the permittee shall either:
a. In accordance with the Schedule of Compliance contained in Part I,
provide an alternative power source sufficient to operate the waste-
water control facilities;
or,if such alternative power source is not in existence, and no date for
its implementation appears in Part I,
b. Halt, reduce or otherwise control production and/or all discharges
from wastewater control facilities upon the reduction, loss, or
failure of the primary source of power to said wastewater control
facilities.
8. Onshore or Offshore Construction
This permit does not authorize or approve the construction of any onshore
or offshore physical structures or facilities or the undertaking of any
work in any navigable waters.
M

PART II
Permit No. NC
B. RESPONSIt3TLITTECS
1. Right of Entry
The permittee shall allow the Director of the Division of Environmental
Management, the Regior:al Administrator, and/or their authorized represen-
tatives, upon the presentations of credentials:
a. The enter upon the permittee's premises where an effluent source it
located or in which any records are required to be kept under the
terms and conditions of this permit; and
b. At reasonable times to have access to and copy any records required
to be kepi under the terms and conditions of this permit; to inspect
any monitoring equipment or monitoring method required in this permit;
and to sample any discharge of pollutants.
2. Transfer of Ownership or Control
This permit is not transferable. In the event of any change in control
or ownership of fa—c ilities from which the authorized discharge emanates
or is contemplates, the permittee shall notify the prospective owner or
controller by letter of the existence of this permit and of the need to
obtain a permitI r the name of the prospective owner. A copy of the
letter shal" be.forwarded to the Division of Environmental Management.
3. Availability of Reports
Except for data determined to be confidential under N. C. G. S. 143-215.
3(a)(2) or Section 308 of the Federal Act, 33 USC 1318, all reports prepared
in accordance with the terms shall be available for public inspection at the
offices of the Division of Environmental Management: As required by the Act,
effluent data shall not be considered confidential. Knowingly making any
false statement on any such report may result in the i osition of criminal
penalties as provided for in N. C. G. S. 143-215.6(b)(22 or in Section
309 of the Federa , Act.
4. Permit Modification
After notice and opportunity for a hearing pursuant to N. C. G. S. 143-
215.1(b)(2) and n.. S. 143-215.1(e) respectively, this permit may be
modified, suspendel, or revoked in whole or in part during its term for
cause including, but not limited to, the following:
a. Violation of any tears or conditions of this permit;
b. Obtaining this permit by misrepresentation or failure to disclose
fully all relevant facts; or
c. A change in any condition that requires either a temporary or
permanent reduction or elimination of the authorized discharge.
M10&I9

PART II
Permit Nc.. NC
5. Toxic Pollutants
Notwithstanding Part II, B-4 above, if a toxic effluent standard or
prohibition (including any schedule of compliance specified in such
effluent standard or prohibition) is established under Section 307(a)
of the Act for a toxic pollutant which is present in the discharge and
such standard or prohibition is more stringent than any limitation for
such pollutant in this permit, this permit shall be revised or modified
in accordance with the toxic effluent standard or prohibition and the
permittee so notified.
6. Civil and Criminal Liability
Except as provided in permit conditions on "Bypassing" (Part II, A-5)
and "Power Failures" (Part II, A-7), nothing in this permit shall be
construed to relieve the permittee from civil or criminal penalties for
noncompliance pursuant to N. C. G. S. 143-215.6 or Section 309 of the
Federal Act, 33 USC 1319.
7. Oil and Hazardous Substance Liability
Nothing in this permit shall be construed to preclude the institution
of any legal action or relieve the permittee from any responsibilities,
liabilities, or penalties to which the permittee is or may be subject
under N. C. G. S. 143-215.75 et seq. or Section 311 of the Federal Act,
33 USC 1321.
8. Property Rights
The issuance of this permit does not convey any property rights in either
real or personal property, or any exclusive privileges, nor does it
authorize any injury to private property or any invasion of personal
rights, nor any infringement of Federal,State or local laws or regulations.
9. Severability
The provisions of this permit are severable, and if any provision of this
permit, or the application of any provision of this permit to any circum-
stance, is held invalid, the application of such provision to other cir-
cumstances, and the reMA nder of this permit shall not be affected thereby.
M 11 & I 10

PART II
Permit No NC
10. Expiration of Permit
Permittee is not authorized to discharge after the expiration date.
In order to receive authorization to discharge beyond the expiration
date, the permittee shall submit such information, forms, and fees as
are required by the agency authorized to issue permits no later than 180
days prior to the expiration date. Any discharge without a permit after
the expiration will subject the permittee to enforcement procedures as
provided in N. C. G. S. 143-215.6 and 33 USC 1251 et seq..
I 11

PART 1II
Permit No. NC 0004961
A. Previous R,@rmits
All previous State water quality permits issued to this facility,
whether for construction or operation or discharge, are hereby revoked
by issuance of this permit. The conditions, requirements, terms, and
provisions of this permit authorizing discharge under the National
Pollutant Discharge Elimination System governs discharges from this
facility.
B. Construction
No construction of wastewater treatment facilities or -additions thereto
shall be begun until Final Plans and Specifications have been submitted
to the Division of Environmental Management and written approval and
Authorization to Construct has been issued. If no objections to Final
Plans and Specifications has been made by the OEM after 30 days following
receipt of the plans or issuance of this permit, whichever is latter, the
plans may be considered approved and construction authorized.
C. Certified Operator
Pursuant to Chapter 90A of North Carolina General Statutes, the permittee
shall employ a certified wastewater treatment plant operator in responsible
charge of the wastewater treatment facilities. Such operator must hold a
certification of the grade equivalent to the classification assigned to
the wastewater treatment facilities.
D. In the event that waste streams from various sources are combined for treat-
ment or discharge, the quantity of each pollutant or pollutant prouerty
attributable to each controlled waste source shall not exceed the specified
limitation for that waste source.
E. If the permittee, after monitoring for at least six months, determines that
he is consistently meeting the effluent limits contained herein, the permittee
may request of the Director that the monitoring requirements be reduced to 3
lesser frequency.
F. There shall be no discharge of aolychlorinated byphenyl compounds such as
those commonly used for transformer fluid.
C• The company shall notify the Director in writing not later than sixt�r days
prior to instituting use of any biocide or chemical used in cooling systems,
including chlorine, which may be toxic to aquatic life other than those
previously reported to the Division of Environmental Management. Such
no tification shall include:
1. Name and general composition of biocide or chemical,
2. Proposed discharge concentrations,
3. Quantities to be used, and
4. Frequencies of use.
M15&I12

Part III
Permit No. NC0004961
H. Continued intake screen backwash discharge is permitted without limita-
tions or monitoring requirements.
I. Nothing contained in this pernitt shall be construed as a waiver by
permiitee or any right to a hearing it may have pursuant to State or
Federal laws or regulations.
J. This permit shall be modified, or alternatively, revoked and reissued
to comply with any applicable effluent standard or limitation issued
or approved under Section 301(b)(2)(C), and (D), 304(b)(2), and 307(a)(2)
of the Clean Water Act, if the effluent standard or limitation so
issued or approved:
1. Contains different conditions or is otherwise more stringent
than any effluent limitation in the permit; or
2. Controls any pollutant not limited in the permit.
The permit as modified or reissued under this paragraph shall also
contain any other requirements of the Act then applicable.
K. The term "low volume waste sources" means, taken collectively as if
from one source, wastewater from all sources except those for which
specific limitations are otherwise established in this part. Low
volume wastes sources include, but are not limited to: Wastewaters
from wet scrubber air pollution control systems, ion exchange water
treatment system, water treatment evaporator blowdown, laboratory and
sampling streams, boiler blowdown, floor drains, cooling tower basin
cleaning wastes, and recirculating house service water systems. Sanitary
and air conditioning wastes are not included.
L. The term "metal cleaning waste" means any wastewater resulting from
cleaning (with or without chemical cleaning compounds) any metal process
equipment including, but not limited to, boiler tube cleaning, boiler
fireside cleaning, and air preheater cleaning. Metals cleaning will
be conducted according to Duke Power's approved equivalency demonstration.
M. The term "chemical metals 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.
N. It has been determined from information submitted that the plans and
procedures in place at Riverbend Steam Station are equivalent to that
of a BMP.
0. "Upset" means an exceptional incident in which there is unintentional
and temporary non-compliance with technology based permit effluent
limitations because of factors beyond the reasonable control of the
permittee. An upset does not include noncompliance to the extend caused
by operational error, improperly designed treatment facilities, inadequate
treatment facilities, lack of preventive maintenance, or careless or
improper operations.

Permit No.- NU UvU4y01
DRASTATE OF NORTH CAROLINA
DEPARTMENT OF NATURAL RESOURCES & COMMUNITY DEVELOPMENT
DIVISION OF ENVIRONMENTAL MANAGEMENT
P E R M I T
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 Power Company
is hereby authorized to discharge wastewater from a facility located at
Riverbeud Steam Station
Y
Gaston County
to receiving waters designated the Catawba River in the Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, and III hereof.
This permit shall become effective
This permit and the authorization to discharge shall expire at midnight
on
Signed this day of D F
RA'T
Robert F. Helms., Director
Division of Environmental Management
By Authority of the Environmental
Management Commission
M1 & I1 ,

Permit No. NC0004961
SUPPLEMENT TO PERMIT COVER SHEET
Duke Power Company
is hereby authorized to:
1. Enter into a contract for construction of any additional waste-
water treatment facility necessary to comply with the final
effluent limitation contained in this permit, and
2. After receiving an Authorization to Construct from the Division
of Environmental Management, construct and operate additional
wastewater treatment facilities necessary to comply with the
final effluent limitations contained in this permit, and
tinue to operate and maintain the existing wastewater treatment
facility located at the Riverbend Steam Electric Generating
Plant (See Part III of this permit), and
3. Discharge from said treatment works into the Catawba River
which is classified Class "A -II" waters.
4:•,t
F
'::j:

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
A. (1).
beginning °n the effective date of the Permit
During the periodg
aby(thespermitteebas(specified
and lasting
Once ithroughacoolinghwater
pertnittee is authorized to discaand monitorede from
� limited
below:
Such discharges shall be
Monitoring Requirements
Discharge Limitations_
Effluent Characteristics
Units (Specify)
Measurement Sample
Sample
***Sample
Kg/day (lbs/day) Other
Daily Avg. Daily Max.
Frequency Type
�—
Daily Avg. Daiocation
ly Max.
Daily Pump log or
E
Flow
Similar reading
Daily Grab
E,U,D
Temperature*
200 ug/l
Daily Multiple
E
Total Residual Chlorine**
Grabs
*As a result of this discharge, the receiving waters'
oC
temperature
shall not be increased by more than 2.8above
ambient water
`
29oC.
temperature and in no case exceedany
:1
**Total Residual Chlorine may not be discharged
day.
from
Simultaneouse
?
generating unit for more than two hours per
mglti.,µpit chlorination is permitted.
stream
*** E - Effluent, U - Ups.. D -„Downstream
.��
4- t F
iG
r� O
6.0 standard units nor greater than
9.0 standard units
The pH shall not be less than
and -'shall be monitored daily at the effluent by grab samples.
;:,,, _ ..: ,. ,, �� „N „�,:►, , fnam in other
than trace amounts.

w
(2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
A,
During the period beginning on the effective date of the p ermit
sereimitteenumbas(specified
and lasting until expiration, the
settling p and discharge
permee s authorized to discharge from outfall(s)
t 1
limited and monitored by the p
below
. Such discharges shall be
Such
Monitoring Requirements_
Discharge Limitations
Eff 1 uent Characteristics
Units (Specify)
Measurement Sample
Sample
Kg/day (lbs/day) Other
Daily Avg_ Daily Max.
Frequency y e
Location
Daily Avg. Daily Max.
i
Weekly pump logs or
Effluent
i
Similar readings
Flow
15 mg/1 20 mg/l
2/Month Grab
Grab
Effluent
Effluent
Oil and Grease 30 mg/1 100 mg/1
Total Suspended Solids 1000 Vg/1 1000 ug/1
2/Month
2/Month Grab
Effluent
Effluent
' Total Copper 1000 11t/1 1000 ug/l
2/Month Grab
Quarterly Grab
Effluent
Total Iron
Quarterly Grab
Effluent
.. Total -Arsenic..
Quarterly Grab
Effluent
Total Selenium
Total Vanadium**
2/Month Grab
Effluent
pH
*Effluent sampling shall be conducted at the discharge from the ash
settling pond prior
to mixing with any other;waste stream-';.,:
shall only be conducted for any quarter during which the generating
.
**Monitoring for vanadium
plant js: oil fired.
s' and low volume waste. shall
coal runoE ,, ash transport caster,
The ppe-.W cleaning waste, :pile
be discharged into the ash settling pond.
z
f.:
p C+ r
y
ONO
r.
6.0 standard units nor greater than
9.o standard units
The pH shall not be less than
and shall , be monitored as indicated above.
TherO.!,shall be no discharge of floating solids or visible foam in other
than trace amounts,

'�t:
3
w
A. (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the period beginning on
the effective date of the Permit and lasting until expiration,
serial number(s) 03 domestic (discharge
to intake
the permittee is authorized to discharge from outfall(s)
Such discharges shall be limited and monitored by
the permittee
as specified below:
canal)
Effluent Characteristics Discharge
Limitations
Monitoring
Requirements
K da lbs da
Other -Units
(Specify)
Measurement
Sample *
Sample
Monthl Av Weekly Av
Mont_ y vg.
_ee y vg.
requency
Type
Location
Effluent
Flow °
0.010 MGD
30
45 mg/l
2/Month Instantaneous
2/Month Grab
Effluent
BOD, 5day, 20C
mg/l
30 mg/1
45 mg/1
2/Month
Grab
Effluent
TSS
Fecal Coliform (geometric mean)
1000/100 ml
2000/100 ml
2/Month
Grab
Effluent
*Effluent samples shall be collected at the point of discharge prior to mixing with any
other waste stream.
The'pH'shall not be less than 6.0 standard units nor greater than 9.o standard units and
shall be monitored 2/Month at the effluent by grab samples.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

PAKI 111
Permit No. NC 0004961
B. Previous Permits
All previous State water quality permits issued to this facility,
whether for construction or operation or discharge, are hereby revoked
by issuance of this permit. The conditions, requirements, terms, and
provisions of this permit authorizing discharge under the National
Pollutant Discharge Elimination System governs discharges from this
facility.
C. Construction
No construction of wastewater treatment facilities or additions thereto
shall be begun until Final Plans and Specifications have been submitted
to the Division of Environmental Management and written approval and
Authorization to Construct has-been issued. If no objections to Final
Plans and Specifications has been made by the OEM after 30 days following
receipt of the plans or issuance of this permit, whichever is latter, the
plans may be considered approved and construction authorized.
D. Certified Operator
Pursuant to Chapter 90A of North Carolina General Statutes, the permittee
shall employ a certified wastewater treatment plant operator in responsible
charge of the wastewater treatment facilities. Such operator must hold a
certification of the grade equivalent to the classification assigned -to
the wastewater treatment facilities.
E. In the event that waste streams from various sources are combined for treat-
ment or discharge, the quantity of each pollutant or pollutant property
attributable to each controlled waste source shall not exceed the specified
limitation for that waste source.
F. If the permittee, after monitoring for at least six months, determines that
he is consistently meeting the effluent limits contained herein, the permitte
may request of the Director that the monitoring requirements be reduced to a
lesser frequency.
G. There shall be no discharge of polychlorinated byphenyl compounds such as
those commonly used for transformer fluid. jl -
H. The company shall notify the Director in writing.not..later than sixty (60)
days prior to instituting use of any additional biocide or chemical..used in
cooling systems, other than chlorine, which may be toxic.jt_o aquatic life othc
than those previously reported to the Division of Environmental Management.
Such notification --shall include:
1. Name and general composition of biocide or chemi�a ,,t--_
2. Proposed discharge concentrations,
3. Quantitites to be used, and
4. Frequencies of use.

Permit No. NC0004961
I. Continued intake screen backwash discharge is permitted without
limitations or monitoring requirements.
J. 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.
K. This permit shall be modified, or alternatively, revoked and
reissued, to comply with any applicable effluent standard or
limitation issued or approved under Section 301(b)(2)(C), and
(D) , 304(b)(2), and 307(a) (2) of the Clean Water Act, if the
effluent standard or limitation so issued or approved:
(1) Contains different conditions or is otherwise more
stringent than any effluent limitation in the permit;
or
(2) Controls any pollutant not limited in the pe
The permit as modified or reissued under this paragraph shall
also contain any other requirements of the Act then applicable.
L. The term "low volume waste sources means, taken collectively as
if from one source, wastewater from all sources except those for
which specific limitations are otherwise established in this part.
Low volume wastes sources include, but are not limited to: waste-
waters from wet scrubber air pollution control systems, ion
exchange water treatment system, water treatment evaporator blow -
down, laboratory and sampling streams, boiler blowdown, floor
drains, cooling tower basin cleaning wastes, and recirculating
house service water systems. Sanitary and air conditioning wastes
are not included.
M. 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.
N. "The Permittee shall develop and implement a Best Management Practices
(BMP) Plan to.identify and control the discharge of oils and the haz-
ardous and toxic substances listed in 40 CFR, Part 117 and Tables II and
III of Appendix D to 40 CFR, Part 122. The Plan shall include a listing
of all potential sources of spill or leaks of these materials, a -method
for containment, a description of training, inspection and security
procedures, and emergency response measures to be taken in the event
of a discharge to surface waters. Souces of such discharges_may-include,
but are not limited to, materials storage areas; in -plant -transfer,.
process and material handling areas; loading and unloading operations;
plant site runoff; and sludge and waste disposal areas.The BHP. -Plan-
shall be developed in accordance with good engineering -practices, shad
be documented in narrative form; and shall include any necessary plot--

FKI;
-
Permit No. NC0004961
N. plans, drawings, or maps. The Mg Plan shall be developed no later than
six months after is of the final permit (or modification), and
(coat) ear after.issuance of the final
shall be implemented no later than one y
permit (or modification). The BHP Plan shall EP maintained ersonnel "mot
site and shall be available for inspection by
.._ _..:.. .. _.,-..t:.+.�T.7?...>?3�"n:-...+'r'�+�•- w��%i!s�!. �+_ ,'�.�.-L�.`� ... .. r :'`�`�.�". ...� »�-`iFY�'Jx _._ �l`�.

STATE OF NORTH CAR UNA
DEPARTMENT OF NATURAL RESOURCES & Cu:',MMITY DEVcLOPIMISiT
DIVISION OF ENrV1R0►=,'4,E:iT=AL i.A. !Aut,:ENT
P r P -1 I T
To Discharge Glastev,4ater Under TheATsd YL _
POLLUTANT DISCHARGE ELI141MA1103 .SYSTEM
In compliance with the provisions of tiorth Carolina Genaral Statute
1 3-2 i S _ 1, O this 1 aW t ul standards and regul at ions pram u l ga `ed aid adopted
tf?a�r tiff Carolina Envi rore�ttal t•3?rayet�'?!t i_ Co►1IrEi SSi.OtT, ana i(i? Federal
Water Pollution Control Act, as amanded,
Duke Power Company
s hereby authorized to discharge v a5te;�a i:ei' i rtJn! a i aCl 1 i ty 1 OCa fed Zt
Riverbend Steam Station
Gaston County
to receiving waters
Catawba River in the Catawba River -Basin
is accordance ,;ti'�h 2filu2nt limitatio?zs :.:on;to►-ing read. and ot���r
conuizions se-t -Forth in Farts I, II, anal I'll herao-; _
This parriit shall bacon? effective February 19, 1980.
This per ri t and the authorization to di scharga sh al I exp rz at
on rti d:t1 Sb 4
Si cued this day of
A. F. 11--Rori Director
Division of Env •non -mental Mlanaj.=mant
8y Autho: it--y- or the Env1,-on,s.ental
t. anage ent Coirmi ssi on

A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning February 19, 1930 and lasting until expiration,
permittee is authorized to discharge from outfall(s) serial number (0001 -cool i ng water to Catawba River.
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
Flow N/A N/A
Discharge Temperature °C(°F)* 33.30(900) N/A
Intake Temperature 0C(°F) N/A N/A
*During the period July 1 to October 15, 34.40C (94.00F) is permitted.
Monitorinq Requirements
Measurement
Sample
Sample
Frequency
Type
Location
Hourly
Recording
Effluent
Hourly
Recording
Effluent
Hourly
Recording
Influent
The Administrator of the Environmental Protection Agency, Region IV, 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.
1-4
The pH shall not be less than standard units nor greater than standard units
and shall be monitored
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning February 19, 1980 and lasting until expiration,
permittee is authorized to discharge from outfall(s) serial number(s)0.02-ash pond discharge to intake canal.
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
Oil b Grease
TSS
Arsenic
Cadmium
Copper
Iron
Chromium
Mercury
Nickel
Selenium
Zinc
Discharge Limitations
Monitoring Requirements
Kg/day (lbs/day) Other Units
(Specify)
Measurement
Sample
Sample
Daily Avg. Daily Max. Daily Avg.
Daily Max.
Frequency
Type
Location
N/A
N/A
Daily
Instantaneous
Effluent
15 mg/l
20 mg/l
Monthly
Grab
Effluent
30 mg/l
45 mg/l
Monthly
Grab
Effluent
N/A
N/A
Quarterly
Composite
Effluent
N/A
N/A
Quarterly
Composite
Effluent
N/A
N/A
Quarterly
Composite
Effluent
N/A
N/A
Quarterly
Composite
Effluent
N/A
N/A
Quarterly
Composite
Effluent
N/A
N/A
Quarterly
Composite
Effluent
N/A
N/A
Quarterly
Composite
Effluent
N/A
H/A
Quarterly
Composite
Effluent
N/A
N/A
Quarterly
Composite
Effluent
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
and shall be monitored weekly at upstream and downstream points and three meters from the end of
ash pond discharge by grab samples.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning February 19, 1980 and lasting until expiration,
permittee is authorized to discharge from outfall(s) serial number (s) .003-metal cleaning wastes to ash pond.
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
Copper
Iron
Discharge Limitations
Kg/day (lbs/day) Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
N/A N/A
1.0 mg/l 1.0 mg/l
1.0 mg/l 1.0 mg/l
Monitoring Requirements
Measurement Sample Sample
Frequency TyQe Location
Metal cleaning wastes shall mean any chemical cleaning compounds, rinse waters from chemical cleaning, or any other
waterborne residues derived from chemical cleaning any metal process equipment, including but not limited to boiler tube
cleaning, boiler fireside cleaning, or air preheater cleaning.
The pH shall not be less than standard units nor greater than standard units
and shall be monitored
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (4. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning February 19 1980 and lasting until expiration,
permittee is authorized to discharge from outfallts) serial number (s)004-domes tic discharge to intake canal.
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Discharge Limitations
Kg/day (lbs/day)
Daily Avg. Daily Max.
Flow
BOD, 5-Day, 200C
TSS
Fecal Coliform (Geometric Mean)
Other Units (Specify)
Daily Avg. Daily Max.
N/A N/A
30 mg/l 45 mg/l
39 mg/l 45 mg/l
200/100 ml 400/100 ml
Monitoring Requirements
Measurement Sample Sample
Frequency Type Location
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
and shall be monitored.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

NORTH CAROLINA DEPARTMENT OF NATURAL RESOURCES & COMMUNITY DEVELOPMENT
ENVIRONMENTAL MANAGEMENT COMMISSION
FACT SHEET
APPLICATION FOR
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
PERMIT TO DISCHARGE TREATED WASTEWATER
Application No. NC 0004961 Date July 24, 1979
1. SYNOPSIS OF APPLICATION
a. Name and Address of Applicant
Duke Power Company
Riverbend Steam Station
422 South Church Street
Charlotte, North Carolina
b. Description of Applicant's Operation
Generation, transmission, and distribution of electricity. Plant fuel
is coal.
c. Production Capacity of Facility
Nameplate rating - 11321 Megawatt hours/day
d. Applicant's Receiving Waters
Catawba River
Best Usage - A source of water supply for drinking, culinary or food
processing purposes.
For a sketch showing the location of the discharge, see Attachment A.
e. Description of Existing Pollution Abatement Facilities
1. A septic tank with a sand filter and chlorination facilities
2. Once through cooling water into a discharge canal
3. Fly ash basin to separate fly ash prior to discharge
4. Intake screenings buried in a landfill
2. PROPOSED FINAL EFFLUENT LIMITATIONS
Same as in the expiring Federally issued NPDES Permit

Page Two
Effluent Characteristic
Source 001
Flow
Discharge Temperature*
oC (OF)
Intake Temperature
oC(oF)
Discharge Limitation
kg/day(lbs/dayy Other Limitations
Daily Daily Specify
AJera e Maximum Daily Daily
Average Maximum
N/A N/A
33.30(900) N/A
N/A N/A
*During period July 1 to October 15, 34.40C (94.00F) is permitted.
Source OG2
Flow
N/A
N/A
Oil & Grease
15 mg/l
20 mg/l
TSS
30 mg/1
45 mg/l
Arsenic
N/A
N/A
Cadmium
N/A
N/A
Chromium
N/A
N/A
Copper
N/A
N/A
Iron
N/A
N/A
Mercury
N/A
N/A
Nickel
N/A
N/A
Selenium
N/A
N/A
Zinc
N/A
N/A
3. MONITORING REQUIREMENTS
The applicant will be required to monitor regularly for flow and those
parameters limited in Section 2 above with sufficient frequency to insure
compliance with the permit conditions. Frequency, methods of sampling,
and reporting dates will be specified in the final permit.
4. PROPOSED COMPLIANCE SCHEDULE FOR ATTAINING EFFLUENT LIMITATIONS
a. Comply with final effluent limits on the effective date of the permit.
5. PROPOSED SPECIAL CONDITIONS WHICH WILL HAVE A SIGNIFICANT IMPACT ON THE
DISCHARGE
a. None
6. WATER QUALITY STANDARDS APPLIED TO THE DISCHARGE
Effluent limitations are based on best practicable control technology
currently available and will meet State and Federal water quality
standards of Class A -II, 6 waters.

Page Three
7. PROCEDURES FOR THE FORMULATION OF FINAL DETERMINATIONS
a. Comment Period
The Division of Environmental Management proposes to issue an NPDES permit
to this applicant subject to the effluent limitations and special conditions
outlined above. These determinations are tentative.
Interested persons are invited to submit written comments on the permit
application or on the Division of Environmental Management's proposed
determinations to the following address:
DIVISION OF ENVIRONMENTAL MANAGEMENT
WASTEWATER MANAGEMENT
POST OFFICE BOX 27687
RALEIGH, NORTH CAROLINA 27611
All comments received prior to will be considered in the
formulation of final determinations with regard to this application.
b. Public Hearing
The Director of the Division of Environmental Management may hold a public
hearing if there is a significant degree of public interest in a proposed
permit or group of permits. Public notice of such a hearing will be
circulated in newspapers in the geographical area of the discharge and to
those on the Division of Environmental Management's mailing list at least
thirty days prior to the hearing.
Following the public hearing, the Director of the Division of Environmental
Management may make such modifications in the terms and conditions of the
proposed permit as may be appropriate and shall issue or deny the permit.
Notice of issuance or denial will be circulated to those who participated in
the hearing and to appropriate persons on the Division of Environmental
Management's mailing list.
If the permit is issued, it will become effective 30 days following date of
issuance and will be the final action of the Division of Environmental
Management unless an appeal hearing is granted.
c. Appeal Hearings
An applicant whose permit is denied, or is granted subject to conditions
he deems unacceptable, shall have the right to a hearing before the
Commission upon making written demand to the Director within 30 days
following notice of final decision to deny or grant the permit.
d. Issuance of the Permit When No Hearings are Held
If no public hearing or appeal hearing is held, and after review of the
comments received, the Division of Environmental Management's determinations
are substantially unchanged, the permit will issue and become effective
immediately. This will be the final action of the Division of Environmental
Management.

Page Four
If no hearings are held, but there have been substantial changes, public
notice of the Division of Environmental Management's revised determinations
will be made. Following a 30-day comment period, the permit will issue and
become effective immediately and will be the final action of the Division of
Environmental Management, unless a public or appeal hearing is granted.

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STAFF REPORT AND RECOMMENDATIONS
Part I - INSPECTION OF WASTEWATER TREATMENT PLANT SITE
1. Place visited: Duke Power Company
Riverbend Steam Station
Gaston County
2.
Date:
July 25, 1979
3.
By:
David T. Adkins--- 'qv
4. Person contacted: Bill Kinsey, Superintendent of Maintenance
5. Directions to site: Travel west of Charlotte on N. C. Highway 16
to the Catawba River. Riberbend Steam Station i-s located on the north
side of N. C. 16 approximately 0.5 mile past the Catawba River Bridge.
6. The bearing and distance to the proposed point of effluent discharge
is: Not applicable. The co-ordinates of the discharge are:
N 35021'28" and W 80058'89".
7. Size: Adequate for the continued operation of the existing facilities.
8. Topography: Sloping toward Catawba River at a rate of 6 to 10%.
9. Location of nearest dwelling: None within 500 feet of the facility.
10. Receiving Stream: Catawba River
(a) Classification: A -II
(b) Minimum 7-Day, 10-Year discharge at site: Controlled minimum
discharge at site.
(c) Usage: For use in bathing or as a source of water supply for
drinking, culinary, or food processing purposes after approved
treatment.
Part II - DESCRIPTION OF EXISTING TREATMENT WORKS
Duke Power Company presently operates A 10,000 GPD septic tank -sand filter
to treat the domestic wastewater generated on site. The discharge from
the wastewater treatment plant is into the intake canal for the cooling
water.
The metal cleaning water is discharged into the fly ash lagoon. There
is an underflow discharge from the fly ash lagoon.
All the wastewater leaving the fly ash lagoon is monitored for the
parameters necessary for the metal cleaning process and the fly ash
lagoon.

Page Two
Part III - EVALUATION AND RECOMMENDATIONS
The effluent parameters are the same as the existing Federally issued
NRDES Permit. As the domestic waste is discharged into the intake canal
for cooling water and the metal cleaning water is discharged into the
fly ash lagoon, it is recommended the wastewater sampling be reduced
to these two sources of pollutants. The wastewater should be sampled
from the cooling water canal and the fly ash lagoon only.
It is recommended NPDES Permit No. NC 0004961 be reissued for this
discharger.

L
POAVER COMPANY
W-CENTEAM PRODUCTION DEPT. X
GENERAL OFFICES TELEPHONE: AREA 704
P. 0. BOX 3318 p R Q 422 SOUTH CHURCH STREET 373-4011
JUL 24 10 CHARLOTTE, N. C. 25242 /
July 16, 1979 I'
AND AIR
4�uNUJ I
Mr. A. F. McRorie
Director, Division of Environmental Management
Box 27687
Raleigh, North Carolina 27611
Subject: Riverbend Steam Station
Renewal of Permit No. NC 0004961
Authorization to Discharge Under the
National Pollutant Discharge Elimination System
File: RB-704.15, 708.15
Dear Mr. McRorie:
Permit number NC 0004961, issued March 3, 1976, in compliance with the
provisions of the Federal Water Pollution Control Act, as amended, will
expire at midnight, February 18, 1980.
No significant modifications have been made to this station. We therefore,
in accordance with 15 NCAC §2H.0105 (c), request that this permit be reissued
as it presently exists with the following minor revisions:
(1) Serial Number 002 - Ash Pond Discharge: We request a change in the sampling
location description as follows: "Samples taken in compliance with moni-
toring requirements...shall be taken at the following location(s): Ash
pond discharge prior to mixing with any other waste streams except for pH
which shall be sampled at the confluence of the discharge and receiving
stream."
(2) Serial Number 005 - Boiler Blowdown: We request removal per a letter
dated 20 January 1978 addressed to Mr. W. A. Haller from Mr. Paul J.
Traina, Director, Enforcement Division. The above mentioned letter
delegated authority to eliminate the surveillance monitoring.
(3) Part I.B. Schedule of Compliance: We request this section be removed
from the permit as it is no longer applicable.
(4) Part III. E. and G.: We request that these sections be removed as they
are no longer applicable.
(5) Part I.C.2. Reporting: We request the reporting requirements be changed
to allow 45 days to submit the report and that the report be submitted
only to the Department of Natural Resources and Community Development.

Mr. A. F. McRorie
Page 2
July 16, 1979
We will be happy to supply additional information at your request.
Very truly yours,
W. A. Haller
Manager, Technical and Environmental
Services Group
LWP/hs
cc: R. F. Gray
R. B. Thompson
C. A. Dewey
J. E. Lansche
South Piedmont Field Office

MAR — 3-1976
CERTIFIED MAIL
Mr. W.S. ; ea
Senior Vice President
Duke Power Coz?oan�►
Power Building
P.O. Box 217S
Cbaxlotte, Worth Carolina 23242
Re: Riverbend Steam Station
NPDLS IN =0
oS wV., Co .
Bear Mr. Lee :
Enclosed is a modified r-iatiz=sa1 Pollutant Discharge Elimination
System permit for the above referenced facility which replaces in its
entirety the rVDES per -wit previously issued on December 31, 1974_
in accordance with the Enviro.-manta1 Protection Agency regulations
founcz in 40 CPR 125 (as amender 3u1y 24, 1974 39FR27076) , this modification
will become affective on tau date noted in the modification, provided the
nor IB
,nest for an adjudicatcry wearing is filed wit-. the Ardency. In t -
event that such a request is filed, the conteste::xproaisions of to-e
modification itself will be stayed and will not become effective until the
administrative review process is cordolate. ;kll uncontested portions of
the modification will iae co,asiaered operative on the effective date and
=ust be eompliad *ith by the facility.
If you wish are adjudica ory hearing, a request rust be sulxntitterj to
the R? egional : earinq Clerk within 13 days from receipt of ti:is latter. The
request will be tisaely if maile ;may Certifioc: Mail within the teza(10) day
MAR 8 t976
-n
FitL'u 3�►�.'d t :
a

tl
2
period. For the request to be valid, it must conform to Cie requirements
,of 40 CPR 125.36(b) as noted above.
If you have any questions, please contact Mr. Join W. Wilcox at
404/526--3506.
Enclosures
cc:
Sincerely yours,
'/sJ Uohri A. Little
Deputy Regional Administrator
Jack L. Ravan
Pagional ;administrator
N-C-Department of Nat=za and l
Economic Resources
w/enclosure '

Fermit No. NUM04961-
Appl.ication No. NC 074 3BK 2 000311
AUTTHOR^^IZATION TO DISCHARGE UNDER THE
N,,ATIONAL 1 VLLUT.'-NT DISCIUJUGE ) LI';INATIO;: SYSTEM
In compliance with the provisions,of the Federal (later PQ11.tion Control
Act, as amended, (33 U.S.C. 1251 et. seq; the "Act"),'
Duke tower Company ' Q`
P.O. Box 2178 9
Charlotte, North Carolina 28242 �Qjg
-WATER AIV D r
QUA
lITy A(R
is authorized to discharge from a facility located at
Riverbend Steam Station
P.O. Box 367
Mt. Holly, North Carolina 28120
to receiving waters named "ft. Island Reservoir (Catawba River)
from discharge points enumerated herein, as serial numbers 001, 002, 003, n04,
and 005
during the efi�ecti-Te period of this permit
in accordance with effluent limitations, monitoring requirements and other
conditions set forth in Parts I, Ii, and III hereof.
This permit is a modification of the NPDES permit issued for this facility on
December 31, 1974, and replaces that permit in its entirety. This modified
permit shall become effective on receipt.
This modified permit and the authorization to discharge shall expire at mi.dr_ig'ht,
February 18, 1980. Permittee shall not discharge after the above elate of
expiration without prior authorization. In order to receive authorization to
discharge beyond the above dare of expiration, the permittee shall submlit such
informztion, forms, and fees as are required by the Agency authorized to issue
NPDES p�.cllits i,- 1sLCr than 130 days prior to the above date of expiration.
Signed this 3rd day of March 1976
W�,, a - P A"!'. P@rw
j Jac", Kavoi?, l'C-,;J la1 Al rliilli.,;Lr'lt.or
c
4

A. EFFLUENT iIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on effective date and lasting through expiration -
the permittee is authorized to discharge from outfall(s) serial number(s) 001 - Once -through cooling water
discharged to Mt. Island Reservoir (Catawba River)
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent ':'!nracteri:;ti.c
Flow-m 3/Da OA(70)
Discharge 'emperature 'C(°F)
Fr.ai_ availa'r i e chlorine (mg/1)
Total esidual chlorine (mg/1)
Discharge Limitations
Chlorination Monthly Instantaneous
Period Average Average Maximum
N/A N/A N/A
N/A 35 (9.5)* N/A
See Below
See Below
Monitoring Requirements
Measurement Sample
Frequency Type
Hourly
Recorder or pump log
Hourly
Recorder or
calculation
1/week
Multiple grabs
1/week
Multiple grabs
After July 1, 1977, free available chlorine shall not exceed an average concentration of 0.2 mg/1 and a
maximum instantaneous concentration (1 1.5 mg/1 at the outlet corresponding to an individual unit. Neither free
available chlorine nor total residual ine may be discharged from any unit for more than two hours in any
one day and not more than one unit may ii:�:.-,,-c free available or total residual chlorine at any one time unless
the permittee can demonstrate to the Regionli" A0,;-inistrator that the unit(s) cannot operate efficiently at or
below this level of chlorination.
* 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, m
fish and wildlife in and on the receiving body of water.
R N
z
0 0
0
z
c�
0 ►-4
0 v,
0
r
Samples taken in compliance with the monitoring requirements specified above shall be taken aL `D
rn
follewiny, lo.�_tion(.$): Outlet corresponding to an individual unit prior to mi ing with other wa:. ~
streams.

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
!During the period beginning oil effective date and lasting through
the is
June 30, 1977
permittee authorized to disc'hwge from outfall(s) serial number(s)
Lake (Catawba t'iver)
002 -Ash
pond discharge
to Mt. Island
Such discharges shall be limited and monitored by the permiittee as specified below:
Effluent Characteristic Discharge Limitations
Monitoring Requirements
Daily Average Daily
Maximum
Measurement
Sample
Frequency
Type
Flow—m3/Day (MGD) N/A
•
N/A
1/day
Oil and Grease (mg/1) N/A
A
"/month
Weirreading
Total Suspended Solids (m /1
g ) N/A
Heavy Metals l/
NIA
� /month
Graabb
Grab
N/A
N/A
1/month
Grab
1/ Monitoring for heavy metals shall include total arsenic, cadmium, chromium, copper, iron, lead
mercury, nickel, selenium, and zinc.
A Y
3 �
The pH shall not be less than N/A standard units nor greater than N/A standard units and shall o w
be monitored 1/week by taking a grab sample.
Z
There shall be no discharge of floating solids or visit).10 foam'3.n other than trace amounts.
o N
o u,
Samples taken in compliance with the monitoring requirements specified above shall be taken at the
followinglocation s ( ): discharge from ash pond prior to mixing with any other waste stream. ~

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning, July 1, 1977 and lasting through expiration
the permittee is authorized to discharge from outfall(s) serial number(s) 002 - Ash Pond Discharge
to Mountain Island Lake
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent characteristic Discharge Limitations Monitoring Requirements
Daily Average Daily Maximum
Measurement
Sample ,
^requency
Tv pe
Flow-m 3/Day (MGD)
N/A N/A
1/day
Weir reading,
Oil and Grease (mg/1)
15 0
1/month
Grab
Total Suspended Solids (mg/1)
30 * "".)0
l/month
Grab
Heavy Metals
See Below
1/quarter
Grab
Monitoring for heavy metals shall include total arsenic, cadmium, chromium, copper, iron, lead, mercury,
nickel, selenium, and zinc.
* Daily average of 50 mg/1 is permitted provided permittee can satisfactorily demonstrate that the
difference between 30 mg/l and 50 mg/1 is due to the concentration of total suspended solids in
the source body.
o ►c ro
aThe pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be
r•
monitored 1/week by taking a grab sample.
z
There shall be no lischarge of floacing so lAds kil- visible fO"?? in other than trace amounts. o
• c
z '^
o a••r
Samples taken in compliance with the monitoring requirements specified above shall be taken at the o �
with any other waste stream.
following location(s): discharge from ash pond prior to mixing
r
rn
r

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning July 1, 1977 and lasting through expiration
the permittee is authorized to discharge from outfall(s) serial number(s) 003 — Sewage Treatment
Plant discharge to the intake canal
Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristic
Discharge
Limitations
Monitoring Requirements
Organisms
per 100 ml
mg/1
(Geometric mean)
Measurement
Sample
Daily Avg
Daily Max
Daily Avg.
Daily Max
Frequency
Type
Flow—m3/Dap (MGD)
N/A
N/A
N/A
N/A
1/month
during sampling
BOD5
30
45
N/A
N/A
1/quarter
grab
Total Suspended Solids
30
45
N/A
N/A
1/luarter
grab
Fecal Coliform Bacteria
N/A
N/A
200
1100
1/quarter
grab
Total Residual Chlorine
See
Below
N/A
N/A
1/month
grab
Effluent shall contain a minimum of 0.5 mg/1 total residual chlorine at all times.
The pH shall not be less than 6.0 standard units nor greater than 9..0 standard units and shall
be monitored 1/week by taking a grab sample 2 meters (6.6 feet) from the end of the sewage treatment
discharge pipe.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Samples taken in compliance with the monitoring requirements specified above shall be taken at
the following location(s): sewage treatment plant discharge prior to mixing with any other
waste stream except for pH.

off ,
f
A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning July 1, 1977 and lasting through expiration
the permittee is authorized to discharge f •oreOutfall(s) serial number(s) 004* — Metal Cleaning Wastes discharged to the
ash pond
Such discharges shall be limited and monitored by the permittee as specified below:.
Effluent Characteristic Discharge Limitations Monitoring Requirements
Daily Average Daily Maximum Measurement Sample
Frequency Type '
Flow—m3/Day (MGD) N/A
Copper, Total (mg/1) See Below 1/batch Composite/calculation
Iron, Total (mg/1) See Below 1/batch Composite/calculation
Metal cleaning wastes shall mean any cleaning compounds, rinse waters, or any other waterborne residues
derived from cleaning any metal process equipment including, but not limited to, boiler tube cleaning,
boiler fireside cleaning and air preheater cleaning.
Total iron and copper concentrations shall not exceed 1.0 mg/1 respectively as documented by an equivalency
demonstration utilizing analysis of the intake, ash pond, and any necessary pretreatment facility.
In the event a pretreatment facility is necessary, the prl of the discharge shall be maintained at 9.0 or
above and shall be monitored by taking, grab samples. 1/
3 M
There shall be no discharge of floating solids or visible foam in other than trace amounts. - -i
0
Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(-,*
Commensurate with equivalancy demonstration. o
l/ Commensurate with equivalency demonstration. `n
* Serial number assigned for purposes of monitoring and identification.

t
A. EFFLUENT LWITATIONS AND MONITORING REQUIREMENTS
During the period beginning July 1, 1977 and lasting through expiration
the permittee is authorized to discharge from`outfall(s) serial number(s) 005* — Boiler Blowdown discharged •fo the ash basin
' Such discharges shall be limited and monitored by the permittee as specified below:.
Effluent Characteristic Discharge Limitations Monitoring Requirements
Daily Average Daily Maximum Measurement Sample ,
Frequency Type
Flow�m3/Day (MGD) N/A tt/A. 1/week Instantaneous and/o
calculation
Copper, Total (mg/1) 1.0 1.0 1/week Grab
Iron, Total (mg/1) 1.0 1.0 1/week rrab
The pil shall not be less than .N/A standard units nor greater than N/A standard units and shall be monitored
by taking a grab sample once each week.
Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s):
in the boiler drum, flash tank or other location prior to mixing with any other waste stream.
* Serial number assigned for monitoring and identification purposes.
V
3 � 7DD
V
2
a
n
0
o �
un
rn

Page 8 of 15
Permit No-N00004961
B. SCHEDULE OF COMPLIANCE:
1. The permittee shall achieve compliance with the effluent limitations
specified for discharges in accordance with the following schedule:
a• Equivalency Demonstration,'anti/or Chemical Waste Pretreatment
(1) Progress report - 3/31/76
(2) Progress report - 6/30/76
(3) Progress report - 12/31/76
(4) Achieve operational level - 6/30/77 or by the first metal cleaning
thereafter
b. Achieve operational level sewage treatment plant - 6/30/77
2. No later than 14 calendar days following a date identified in the above
schedule of compliance, the permittee shall submit either a report of
progress or, in the case of specific actions being required by identified
dates, a written notice of compliance or noncompliance.* In the latter
case, the notice shall include the cause of noncompliance, any remedial
actions taken, and the probability of meeting the next scheduled requirement.
Note: Any construction of new waste treatment facilities or alterations
to existing waste treatment facilities will require a permit or authoriza-
tion for construction in accordance with applicable state law and regulation.
t

PART 1
v..; 9 .., 15
11cmul Ns. NC0004961
C. MONITORING AND REPORTING
1. Representative Sampling
Samples and measurements taken as required herein shall he representative of the volume
and nature of the monitored discharge.
2. Reporting
Monitoring results obtained during the previous 3 months shall be summarized for
each month and reported on a Discharge ;Monitoring Report Form (EPA No. 3320-1),
postmarked no later than the 28th day of the month following the completed reporting
period. The first report is due on June. 30, 1976 Duplicate signed copies of
these, and all other reports required herein, shall be submitted to the Regional
Administrator and the State at the foJ,..' ping addresses:
Regional Administrator
Environmental Protection Agency
1421 Peachtree Street, N.E.
Atlanta, Georgia 30309
3. DeAnhiont
The "daily average" concentration means the arithmetic average
(weighted by flow) of all the daily determinations of concentra-
tion made during a calendar month. Daily determinations of
concentration made using a composite sample shall be the concen-
tration of the composite sample. When grab samples :re used, the
daily determination of concentration shall be the arithmetic
average (weighted by flow) of all the samples collected during
that calendar day.
a.
North Carolina Dep :rt-Ert of
AND 'Nat,cral 1�: t'conomic Resources
P.O. Box 27687
Raleigh, North Carolina 27611
b. The "daily maximum concentration means the daily determination
of concentration for any calendar day.
C. "Weighted by flow" means the summation of each sample concentration
times its respective flow in convenient units divided by the
.summation of the flow values.
' d. "Nekton" means free swimming aquatic animals whether of freshwater
or marine origin.
e. For the purpose of this permit, a calendar day is defined as any
24-hour period.
f. Daily Average Condenser Discharge Temperature shall be defined as the
arithmetic 24-hour average of hourly excess temperatures (AT's),
weighted by flow, added to the simple arithmetic average of hourly
intake, or natural water source, temperatures.
t

PART i
Pars 10 ,a 1-5
VC,mit Ni, NC0004961
g. Monthly Average Condenser Discharge Temperature shall be defined as
the sum of the "Daily Average Condenser Discharge Temperatures"
divided by the number of days in the calendar mnnth.
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to regulations published
pursuant to Section 304(g) of the Act, under which such procedures may be required.
5. Recording of Results
For each measurement or sample taken pursuant to the requirer.,ents of this permit, the
permittee shall record the following information:
a. The exact place, date, and time of sampling;
b. The dates the analyses were performed;
c. The persons) who performed the analyses;
d. The analytical techniques or met` =s used; and
e. The results of all required analyses.
6. Additional Monitoring by Permittee
If the permittee monitors any pollutant at the location(s) designated herein more
frequently than required by this permit, using approved analytical methods as specified
above, the results of such monitoring shall be included in the calculation and reporting of
the values required in the Discharge Monitoring Report Form (EPA No. 3320-1). Such
increased frequency shall also be indicated.
7. Records Retention
All records and information resulting from the monitoring activities required by this
permit including all records of analyses performed and calibration and maintenance of
instrumentation and recordings from continuous monitoring instrumentation shall be
retained for a minimum of three (3) years, or longer if requested by the Regional
Administrator or the State water pollution control agency.
c

PART 11
A. MANAGEMENT REQUIREMENTS
1. Change in Discharge
All discharges authorized herein shall be
permit. The discharge of any pollutant i
at a level in excess of that authorized
anticipated facility expansions, producti
result in new, different, or increased
submission of a new NPDES application
PAW 11 t" 15
Permit Na. NC0004961
consistent with the terms and conditions of this
lentified in this permit more frequently than or
:hall constitute a violation of the permit. Any
>n increases, or process modifications which will
discharges of pollutants must be reported by
or, if such changes will not violate the effluent
limitations specified in this permit, by notice to the permit issuing authority of such
changes. Following such notice, the permit may be modified to specify and limit any
pollutants not previously limited.
2. Noncompliance Notification
If, for any reason, the permittee does not comply with or will be unable to comply with
any daily maximum effluent limitation specified in this permit, the permittee shall
provide the Regional Administsator and the State with the following information, in
writing, within five (5) days of becoming aware of such condition:
a. A description of the discharge and cause of noncompliance; and
b. The period of noncompliance, including exact dates and times; or, if not corrected,
the anticipated time the noncompliance is expected to continue, and steps being
taken to reduce, eliminate and prevent recurrence of the noncomplying discharge.
3. Facilities Operation
The permittee shall at all times maintain in good working order and operate as efficiently
as possible all treatment or control facilities or systems installed or used by the permittee
to achieve compliance with the terms and conditions of this permit.
4. Adverse Impact
The permittee shall take all reasonable steps to minimize any adverst• impact to navigable
waters resulting from noncompliance with any effluent limitations specified in this
permit, including such accelerated or additional monitoring as necessary to determine the
nature and impact of the noncomplying discharge.
5. Bypassing
Any diversion from or bypass of facilities necessary to maintain compliance with the
terms and conditions of this permit is prohibited, except (i) where unavoidable to prevent
loss of life or severe property damage, or (ii) where excessive storm drainage or runoff
would damage any facilities necessary for compliance with the effluent limitations and
prohibitions of this permit. The permittee shall promptly notify the Regional
Administrator and the State in writing of each such diversion or bypass.

PART 11
Pagr 12 of 15
Peron No. NC0004961
6. Removed Substances
Solids, sludges, filter backwash, or other pollutants removed in the course of treatment or
control of wastewaters shall be disposed of in a manner such as to prevent any pollutant
from such materials from entering navigable waters.
7. Power Failures
In order to maintain compliance with the effluent limitations and prohibitions of this
permit, the permittee shall either:
a. In accordance with the Schedule of Compliance contained in Part I, provide an
alternative power source sufficient to operate the wastewater control facilities;
or, if such alternative power source is not in existence, and no date for its implementation
appears in Part I,
b. Halt, reduce or otherwise control production and/or all discharges upon -the
reduction, loss, or failure of the primary source of power to the wastewater control
facilities.
B. RESPONSIBILITIES
1. Right of Entry
The permittee shall allow the head of the State water pollution control agency, .he
Regional Administrator, and/or their authorized representatives, upon the presentation of
credentials:
a. To enter upon the permittee's premises where an effluent source is located or in
which any records are required to be kept under the terms and conditions of this
permit; and
b. At reasonable times to have access to and copy any records requires' to be kept under
the terms and conditions of this permit; to inspect any monitoring equipment or
monitoring method required in this permit; and to sample any discharge of pollutants.
2. Transfer of Ownership or Control
In the event of any change in control or ownership of facilities from which the authorized
discharges emanate, the permittee shall notify the succeeding owner or controller of the
existence of this permit by letter, a copy of which shall be forwarded to the Regional
Administrator and the State water pollution control agency.
3. Availability of Reports
Except for data determined to be confidential under Section 308 of the Act, all reports
prepared in accordance with the terms of this permit shall be available for public

PART 11
Page 13 or 15
Permit No. NC0004961
inspection at the offices of the State water pollution control agency and the Regional
Administrator. As required by the Act, effluent data shall not be considered confidential.
Knowingly making any false statement on any such report may result in the imposition ()f
criminal penalties as provided for in Section 309 of the Act.
4. Permit Modification
After notice and opportunity for a hearing, this permit may be modified, suspended, or
revoked in whole or in part during its term for cause including, but not limited to, the
following:
a. Violation of any terms or conditions of this permit;
b. Obtaining this permit by misrepresentation or failure to disclose fully all relevant
facts; or
c. A change in any condition ghat requires either a temporary or permanent reduction or
elimination of the authorized discharge.
5. Toxic Pollutants
Notwithstanding Part 11, B-4 above, if a toxic effluent standard or prohibition (including
any schedule of compliance specified in such effluent standard or prohibition) is
established under Section 307(a) of the Act for a toxic pollutant which is present in the
discharge and such standard or prohibition is more stringent than any limitation for such
pollutant in this permit, this permit shall be revised or modified in accordance with the
toxic effluent standard or prohibition and the permittee so notified.
r
6. Civil and Criminal Liability
Except as provided in permit conditions on "Bypassing" (Part II, A-5) and "Power
Failures" (Part II, A-7), nothing in this permit shall be construed to relieve the permittee
from civil or criminal penalties for noncompliance.
7. Oil and Hazardous Substance Liability
Nothing in this permit shall be construed to preclude the institution of any legal action or
relieve the permittee from any responsibilities, liabilities, or penalties to which the
permittee is or may be subject under Section 311 of the Act.
8. State Lawa
Nothing in this permit shall be construed to preclude the institution of any legal action or
relieve the permittee from any responsibilities, liabilities, or penalties established pursuant
to any applicable State law or regulation under authority preserved by Section 510 of the
Act.
c

Page 14 of 15
Permit No. NC0004961
9. Property Rights
The issuance of this permit does not convey any property rights In either
real or personal property, or any exclusive privileges, nor does It
authorize any injury to private property 'or any invasion of personal
rights, nor any infringement of Federal, State or local laws or regulations.
10. Severability
The provisions of this permit are severable, and if any provision of this
permit, or the application of any provision of this permit to any circum-
stance, is held invalid, the application of such provision to other
circumstances, and the remainder of this permit, shall not be affected
hereby.
PART III
OTHER REQUIREMENTS
A. In the event that waste streams from various sources are combined
for treatment or discharge, the quantity of each pollutant or
pollutant property attributable to each controlled waste source
shall not exceed the specified limitation for that waste source.
B. If the permittee, after monitoring for at least six months, deter-
mines tha: he is consistently meeting the effluent limits contained
herein, the permittee may request of the Regional Administrator that
the monitoring requirements be reduced to a lesser frequency or be
eliminated.
C. There shall be no discharge of polychlorinated byphenyl compounds
such as those commonly used for transformer fluid.
D. The company shall notify the Regional Administrator in writing not
later than sixty (60) days prior to instituting use of any additional
biocide or chemical used in cooling systems, other than chlorine, which
may be toxic to aquatic life other than those previously reported to the
Environmental Protection Agency. Such notification shall include:
1. Name and general composition of biocide or chemical
2. Quantities to be used
3. Frequencies of use
4. Proposed discharge concentrations
5. EPA registration number if applicable.
a

PART III
Page 15 of 15
Permit No. NC0004961
E. By June 30, 1977, low volume wastes (waste water from all sources except
those for which specific limitations are otherwise required in this permit,
including, but not limited to waste waters €rom wet scrubber air pollution
control systems, ion exchange water treatment systems, water treatment
evaporator blowdown, laboratory and sampling streams, floor drainage,
cooling tower basin cleaning wastes and blowdown from recirculating house
service water systems) shall be discharged to the ash pond. Permittee
shall continue established procedures designed to minimize oil and -rease
discharges. -
F. Intake screen wash water may be discharged without limitations or monitoring
requirements.
G. Material storage runoff shall be routed to the ash pond. There shall be no
additional monitoring or reporting requirements for this flow. The flow
from material storage runoff, up to and including the flow resulting from
24 hour rainfall event with a probable recurrance interval of once in ten
years, will be -routed to the ash pond and flows exceeding this amount may be
by—passed to the river.
0

North Carolina Department of
Natural & Economic Resources
JAMES E. HOLSHOUSER. JR.. GOVERNOR I.V.-IE5 F. 1IARRINGION. SICRE (ARY
February 23, 1976
Mr. Paul J. Traina, Director
Enforcement Division
Environmental Protection Agency
Region IV
1421 Peachtree Street, N.E.
Atlanta, Georgia 30309
Nvi'1,10N 01'
E NV: Iio, i LG fAL
VANV.; '.'_ i4 T
tt. E. Knight
Acting Director
Subject: Proposed t;odification to
Permit No. NC0004961
Duke Power Co. - Riverbend Steam Station
Gaston County, North Carolina
Dear Nor. Traina :
Pursuant to Section 401 of the Federal Water Pollution Control Act
(33 U. S. C. 1251, 1341; hereafter the "Act"), the State of North Carolina
issues this Certification to subject applicant for a National Pollutant
Discharge Elimination Systerm (;IPDPS) Permit to discharge into navigable
waters.
The proposed modifications to the subject permit contained in Public
Notice No.76N00013 , dated January 15, 1976, are acceptable to the State
of North Carolina and will comply with the applicable provisions of Section
301 of the Act and Chapter 143 of the North Carolina General Statutes.
Furthermore, insofar as we can determine, the Stale of North Carolina certifies
that there are no limitations under Section 302 nor standards under Section
306 or 307 which are applicable to the applicant's discharge.
This Certification shall be subject to the permittee complying with
attached conditions which are to be included in the NPJES Permit.
Sincerely,
W. E. Knight
WQC r 1146
cc: Mr. Bill Reid
South Piedmont Field Office
Technical Services
r,

• TION
CONDITIONS
AROIINA 401 CERTIFICA
NORTH C Tp �lPDES PERMIT FOR
APPEICAg`E _ IV E
GASREEND STEAM.STATION
DUKE POWER COMPAN To COUNTY
NC 0004961
UIREPr,E��T S
CAP.OI-INA MONITORING REQ FINAL ONLY
NpRTN ---� �TEWATER
SANITARY �JA - point
nt
- Sam lin
OUTFAIL SERIAL NUtABERe _
E
Fre uenc
Grab E,U ,D
para Monthly Grab U,D
$ettleable Matter Grab E
p"anthl y
Temperature Monthly Grab I'E,U,D
en
Dissolved Oxy9 Monthly Grab I,E,U'D
Residual
ChlorAne Quarterly Composite E,U,D
PIA 0 Semiannually Composite E,U,D
BOD , 5-Day, 20 C Semiannually Grab I,E
COD Semiannually Composite I E
Fecal Annually Composite '
Col i form, Come I ,E
Total Residue Annually Composite
SuspendedSolids
Total Annually
Ammonia as N ID = D°wnstream
I ^Influent
U = Upstream
E ^ Effluent
h

1,IZ%T10, '1"0l)lCRO
�;�i:r°.ILG:
1`i )'}.,l fJ t' f�T 1•V.I, L IJ'k'.�r:'i l tr...r'7�S�r t�: 21.�X 1=� 1!LPv; l: ?,a .l .i�
1 Ili1 rile I%iC:"11i1 5o.! of i11P Fcder�'l j'r�tl(GI' i Olil:•_iti:I i:'�Ci�? `.Ct, 2'! i:i11-^�{"tl,
r,
f 3, tJ.:i.C. 12 �1 et. seq; the Act"),
Duke Poi:(,): Company
P.
0. I3o:•. 2178 v `
Cha,710tt0:,orth Carolina 28201 i V
' P. R. 0.
FEB n6 1975
WATER AND AlR
is authorized ,,o from a facility located at QUALITY,
&A STQN CO
idverbend Steam Station
p. 0. Box 367
rft. lolly, :•forth Carolina 28120
to rE.'t r_lvtile,' MIL d
Catawba River (14L:. island Reservoir)
�tiitlt :'fTiLlCrit li-,nitatlorls, rnonilorin3 rcquire272;mt-i ind other Cor.'.iltiC::3 Sk-t rt i
`Ihi3 nerinit si3sli uccorne ?f'�fi1"e on February 18, 1975.
Thj.; perr.it anCi the authorization to discl2a''¢33 shall exo- ire at nai,"ini_gh_,
Fe
bruary n , r:c, r.,.-,•,-i troy �,:i,a1 1 r,ot UJ._sc1:a LgE of �:Cr the G`o J°�
data of 4, pl_ration :ai'hoatt Prioraui tzorizatiot�. 1.n c e'er*_o re eive
roe beyond the abo�:e diite cf p�rution, t'_:e
aut:ilolizati•:Jn to Ui •Ct'c:l_"
per.,uittee silal.l_ submit such illrOr i'-ation, Lorrjs, and �2 S as are rc�iU_`_i::?L
by the :agency al.ithOrj_zed %o issue :'ii){%!.:i permits 210 lat2r thin 1 O days
prior to the above date of e:xp=i_ratima.
thic, 31:st clay c De.cembcr 1.97!�
Reg.lo-10-1 .. .._:,i tra for
[PA r-orn; "}370-4 (110-13)
it .

During the periUd T.:`E.-illrl:tng on effective d to and la3ting throt:s,:: +:T.-:�ration
t%.c permittee 1:i c:uLhor.izee- to discharge from outfal'.(o) scri_al ru!,:ibor(�;) 001 & 005 - Oncc-through cooling :rater.
Such discharge, :;lial.l he limited and monitored by Clue permit.too. a, specif ied below:
Ef f.luent Char:.hct Geri:>tic Discharge Limitations Monitoring I?e:quireinents
Instantaneous Measurement Samp1e
Fr_t•qucnc•; Ty e
Flow-m3/Day (MGD) N/A
Temper: ture Pa °C(°F) N/A
Heat Discharge Comply with mixing zor..e 1/
Continuous Recorder or .pump :logs
11our.ly M:hnual
N/A N/A
1/ As deliniated in the State of Forth Carolina Certification, hereby irrlcorporated in this per-mit as pages
19, 20 and 21. Notwithstanding the above requirements, the Regional Administrator has determined pursuant
to Section 316(a) of the Act that the thormal component of the discharge assures the protection and.
propagation of a balanced, indigenous population of shellfish, fish and wildlife in and on the receiving
.body of water.
1,ic2-Lde sddi.tion shall not be :instituted without prior rp.rova.L by thepeegi:,r:al. A:�ri.nistr� toy-,
r•r N
.y
Sa=.files taken in corh J.iance with the monitoxin require.me is specified above shall be taken at the D 1:
ro-Uc*r_iag locations): Outlet corresponding to an indivi,jual unit. c
r.
4
FM

A. Fr rs I,U1'NT LIMITATIONS ANID INIONITOnINu ftr()UIR'-:',! HNTS
Durin,; ti;.^ period beginning on effective date aric,
(s)
junc 30, 1977
002 and 004 -
Ash pond discharge
the pc:. mittee is authorized to disch:: ge from oatfail(s) ::^taal rxr7,.bcr.
Such shsdl'o- hTnited and monitored by the !,cfas spc6fi4:Ct
beloi-v:
j, ` ,,. .ti: Tj• • •"� `•_ l_r..-..l•� ;{(in ;
^L4 i1 :'li( `."i:Zr,ii. '.•�Ti:,L'.• A 1:'( '
p
T%sOTIL�O�In� 11.t'quir�r:�enis
Daily Avg rage, Daily
Masimim
MeasuTerncnt
Sample
Frequency
Type
N/A
N/A
1/clay
Grab
t.•,,r�,.ture
T
ii/[�
Ccnt:in.t�.ouu
recorder
/Dlayi:cr
N/A
:zi/^-
1
I/:-_c�
Grab
Oil 'and. Grease (,.,g/1)
(mg/1) N/A
I</A
1/wec%
L •r:ab
Total, Suspended Solids
'N/A
N/A
1/month
Grab
Heavy :aetals 1/
0.1
0.1
1/day
Grab
Settleable Solids, 30-minute (ml/i)
1 ,try :L LSCIc1 C• CC'? C�':it' �. _i-oi:S ^>i ^rCi(r7bC y!).all not e-cc=d 1?.^Jt:
AC Gcl kc:vyT1`La11977, to
apl�licahlc. water quality standards.
1/ 17c jvy Tietal analyses shall include total £:rsOnics. ^hrom:Cup.., copper, Iron, lead, L_�rcu:"j',
nickel, selenium and zinc. Frequency of aralvsss i� su�o�ect to se -annual rev7_eX :�d
possible reduction or elimination.
The l; x shall not be less than N/A sta,�ci ci units no gi? ester mail N/A s anndazd u- tS �.nd sh<zll be monitored
1/day on a grab sariple.
Thero shall be no discharge of floating solids or %dsible foam in other +damn trice ar oumts. �
z
Samples taken in compliance with the monitorinrt mquirenncnts spceificd above shn.11 'b•' tal.en et the Loll.-4ng locadon(s): y
r)
Ash pond ,discharge for all parameters; heavymetals at a point downstream from the discharge. C) n
ON

W
zLI3rIIT LZiI=';ln'PI�1;ys i1:iD IT()RING REQIIIP.-a'.� if
cir!nin, July 1, 1977 and lasting through e::piration Ash Pond Di charge
� serial nuniuE.r ta) r'
t'Ie ioci be3 �' 00'2 & 004
)
During
15 �'j;:hori7Cd to discharge from outfall(
the perm�.tt-_3
by the permit*.r>e as ^Feciii^d bclo:��:
Such dischal'!cG cha.il be liraited and upon: Cored
Monitoring Requirements
YiZUluenr,tic P.i^.rhaxc> I.imitari.ous
1?.easur ment Sa;nple
Daily Average Pail} tLaximuia Frequency Type
N/A N/A 1/day Grab
Tempe r.atur.c: "C("F) N A Continuous RecordSr
rt%C�
3 z•."-, 20 1.%c•,c:ch Grcb
10'•��•IA Ipfy' 1S
(mg/1) 3/week 8-hr Couposite
^-° 100 l/
Oi?_ and Gre _ 30 1/
Total Su,gr.^ded Solids (m�/1) 11/A 1/month ��{]r CGr�oilte
•
Graff
^cuv Ia�r.alrl ?_/ N/A i �`• d J n
pie en2.11 _� 1 t u
cc.`Ye. ' =o?.ids, .,30-minute (ml/1) 0.1 0 ��? .-" !,y gF is tit^
note CC- lir?it pie
T.c;.�.ltzy discharge concer«rati.ons
quality SL-:. t:;ar:a5.
ceed
intakeoatdrheYreRuestlofstl]Ieopermittee.
l j During periods when influent concentrations of
of zerolabove~nded
liritatiers shall be applied a net basise permittee can provie.e
supply shall be alioo-ec only if th..
vary
'
water i G ;got
r c? 7 tr - total �+-� r n
•C..,.c.it for pollutants in the watex
aoundSolids
supply.
:ltdc�
adecuatc assurance that the cor, Ositbiolof .rn�.ld,s�hc pollutants indtheo� atcr
)
sign—Lficantly, either chemically o .
heavy metal a-_a.lysc s , or ort.er acceptable data.)
(AssurHl]ce should be based on
p �,
' 2/ .,navy ?:�e;_• 1 nnaly-es 3 c.11 include, total arsenic, chro~a:�tm, copper, iron, lead, s^c�bl`.'redi2 t Scrt
to se..i-annual rev eY; arr
r..
seleniun and zinc. c�ecuency of analysis �_s _pub;ect
or. elimination.
6.0 standard units nor greater than 9.0 standard units and skuJI
s,all not be less than
The pii �� �
a grab sample.0''
z � �ti
be oll'tored 1 /day or
n a:
o
U t. rig
discharge of floating solids (jr visible foss+.•ln other than trace amounts.
U h=•
There shall be no
shall be
GNAts ;
F' O
Samples taken in compliance with the moccho]xccngLciiMgl�l?.eme
Ic�c�.,tiAn(:7) !ir]tl pond dl,,. _ garam,�tersia:tddheavyecrtals st aIIpointt
the fh1S�`•i I.I)�'
.art. T1 :_i ;_%L.:l :.. i t'l�:• .. .� dl.:i:..11.11 ^��'' ((i]"il�)� •
h.
H
ft

A. 1:�� 1 1.t11':N'1' 1.,1NIC1'A'I'IUNS ANl) iti9()NITC71i'ING 1i3:t�UI1Lf:��il':iJ'd'�i
i>,I;int�0)], p•riotlJ'ttly 1., 1975 :Inch.1.l:"i:t;�t•hr<,ur;ito";rtVal- lun
;�1�` l'.l-(.tlt.:�'� .',t1�il�:i1','('�.l tt-� (l!::(';t'U;; l•�'(i(:! (>l�t,�:111�:") ;!`l::!l lt(.i',:ti}••j�i:l (fit)•) t roat.mout. plain- (Il.tiCha:'1',C
ix' li.rnited.uui 1-nonitored by the perinittee as Fpeeifilx.i b low:
Effluer-t (:1-tctrackiristic Dkch.trt;e Limitr!tions
1'.i:i>.l�' lA1.V".t.JZ,,Ly .'':.1' ^ I',--i!y
Li
Monitoring►, Ilequirements
F:'i":y:::�Zi:; �.
I''e'„
-m'/I): y (MOD)
N/A
`T/A
N/A...
1/rionth
30
/.�
T�/A
i,/(�,
:ir'r;;or.tiz
` O f
~._._i:iEt:' CLFC,•. 'iol:'_QS
30
'Fecal
G
C•� s ; nor, � EacL-eria
Iv/A.
N/ y
00
;Oi)
/,�,..�r'ter
Free
Available Chlorine
N/A
1.0
V/'A
N/A
e e k
Total_
Residual Chlorine
See Belo;v
N/A
N/A_
l/week
Effluent shell contain a minimum of 0..5 mg/l total. ' rr_•si.dual chlorine at all_ tines .
,.alni('.c
', .
PO
during s aripling
Ccl:nr^.os i.to
cC :Dosite
` (^ab
grab
grab
The pH s1i.dl not be less than 6.0 standard units nor greater than 9.0 standard units and sha?1 be monitored
1/week on a grab sample.
There shr;11 be no discharge of floating solids or visible foain. in other than trace amounts.
Samples taken in compliance with the monitoring requinaments specified above shall be taken at the following loeation(s):
sewage treatment plant discharge.
Note: [there sewage treatment plant discharges to an ash pond measurement frequency shall be
1/quarter except chlorine which shall be I./week.

A. EFFLUENT LF41I'z'ATIONS AND INiONITO..II':G REQUIREMENTS
;.i -ing thf� f�e:iod beginning July 1, 1977 and lasting Through expiration
the rrritt: e is authorized discharge barge from outfsill(s) serial number(s) 011, 002, 005 and/or 00G -Metal Cleaning l:astes and
I:. Boiler Blowdown
Such dischari es shall be limited and monitored by the permittee as specified below:
Discharge Limitations
Monitoring Requirements
!-`---
Ffiiuent Oi,,.racteristic
_ ---
— ----
Daily Average llail.y Maximum
11ie<surernent
Sar_�ple
TVI)e
Frequ'�c-Icy
l/
1/
Flow—rr.1/Day (MGD)
N/A N/A15 20
1/wFc,'K'
Grab
Oil and. G_ease (mg/1)
100
]_/week
8-hr.
composite
Total Suspended Solids (mg/1)
30
i.0
1/week
8-hr.
composite
Copper, Total (mg/1)
1.0
1.0
1/week.
8-hr.
composite
Iron, Total (mg/1)
I.0
Metal cic4ning wastes shall mean
any cleaning corr-Doun3s, rinse waters,
limited
or any other waterborne
to, boiler
tube cleaning,
residues
derived from cleaning any petal process
equipment I cluding, but not
Disposal of sludges
shall be by approved
landfill
boiler fireside cleaning, and air preheater cleaning.
disposal methods is granted by the Regional
Administrator.
unless approval for other
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be ;monitored
con._nensurate with treatment system instituted. q
_rn
There shall be no discharge of floating solids os: -,fisible foam. in other th,n grace amo.mts. �.
ples taken in compliance with the monitoring requirernents speciricld above shill bo tallen at the folloNvInn loeation(s): z
n
point(s) of discharge from the metal cleaning wa :tcs aad boiler blo?Jdorm tre�.itrneut for thty(s) O
O N
unless the permittee can demonstrate to the satisf.:tction Of the Regional Administrator e
desirz:.bi,.ity of combining with other wastes for 1.urtlacr- treatment.
rn
1/ Commensurate with treatment system institute:i.

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period bebinning July 1, 1977 and. lasti.ng through expiration
the perrnittee is authorized to discharge from outfall(s) serial number(s) 001, 002, 005 and/or 007 - Low Volume Waste Sources
Such discharges shall be -limited and monitored by the permitfee as specified below:
Effluent Characteristic
Discharge Limitations
Daily Average
Flow--m3/Day (MGD) N/A
Oil and Grease (mg/1) 15
Total Suspended Solids (mo/1) 30
Daily Maximum
-N/A
20
100
Monitoring Requirements
Measurement
Fregt.ency
1/week
1/week
Sample
Type
1/
Grab
8-hr composiZe
Low volume waste sources shall mean taken collectively as if from one source, waste water from all
sources except those for which specific limitations are otherwise required in t11_3 permit, including,
but`r!ot limited to waste waters from wet scrubber air pollution control systems, ion exchange water
trcatrunt s}'•�r.em~, water. treatment evaporztc-c b.l.ovdovm, laboratory and s.�trplin streams, flour draina�L,
�QO11!1; tower r)aSi.l cleaning Wa5�e3 .?net 'L.,lm7doV-!.1 from recirculating house. servI-en '.'7,ater systC:^ Dig` i1
of sludges shall be by approved landfill u,.les= axr; rova'_ for other disposal methoc..; is granted by the
Regional Administrator.
rtand:u'd tiT..': S nOi ""CC:' :11dll 9.,1 st�.:�nd rd ue li , d shalt be monitored
^+',e p?:i sh11; not T✓e less tl.a.l 6.0- `'
coMr,eusurate with treatment ysteTa instituted.
" r:ere shall be no dischmfte of floating solids or vial?3l^ focin irl :�tl,cr than tr ,cc a:�lounts•
camt)lrs taken in coml)lance with the nru,titorilor, r:, itiii::rrr+:r:l.F. ;:,�:'�:i.'itt(1 �.'co•:^ sit:.�l f.c: 'ark; ,t .ri, the :'o'.lowir:,; location(s):
point:(.) .of discharge from the low volume waist- wato.r. treatment: rcaci]_.ity unl.'�ss the pc:rinittee can
demonstrate to the satisfaction of the Regional Administrator th:' desirability of coarbining with a
other wastes for. further 'treatment.
1/ Commensurate with treatment system instituted.

A. 11,; 1' J,111• N'1' L.'_`/iYVA'1'1()N.S .rVND NION1l'ON.INC., 111-"Q .1(RE!'i!EXI'S
During the period beginning July 1, 1977 and lasting through expiration
ti7c perinittce is authorized to diFelizrgo front outfall(s) srrizl-ivnib'r(s) 004, 005 and/or 008 - Material Stornge Runoff
S;ucl7 ili:; il:Irj;r. sh;Ill be IM-6ted and monitored by t.iw ns:.pvciiil'd 171'low:
1?ffiu-:nt Cli rac.(Alristic
Flow--1.O/Day (MGD)
Total Suspended Solids (mg/1)
Discllcn-ge iamitations
DI'st .lIItus K1:{'jlllum
N/A
50 2/
Monitoring Requirell7enLs
1�IeC?Slll'('I71L'.Ilt �3CII})le
Frequency Typo
1/ 1/
1/ 1/
PLaterial storage runoff shall include rainfall runoff from or through any coal, ash or other material
storage pile.
1/ Frequency and sample type to be commensurate with the waste treatment system instituted.
2/ Ape l.icable to any flow up to and including t1he flow resulting from a 24--hour rainfall event with a
probable recurrence interval of once in ten yea~s.
The pit -halt not be less than 6.0 standard units nor gres-ier than ? . 0 standard units and shall be monitored
cumin. en.surr.te with the waste trew-T-n,ent instituted — 2/ .
n
Thee shall be no discharge of floating solids -or visible icaam in other than trace amounts.
Samples taken in compliance -with the monitoring requirements specified above shall be taken at -the following location(s):
z-
poinr..(s) of discharge front treatment system.1.0
rn
ti
r

A. EFFLUENT LIMITATIONS AND MONITORING REQL-IREM NTS
During the period beginning December 31, 1975 and lasting through expiration
the permittee is authorized to discharge from outfall(s) serial nu.mber(s) 009 - Construction Runoff
Such r?hwharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristic
Flow—rn3 /Day. (MGD)
Total Suspended Solids (mg/1)
Discharge Limitations
instantaneous Y=imum
N/A
50 2/
Monitoring Requirements
Measurement Sample
Frequency Type
1/ 1/
s/ 1/
Construction runoff shall include rainfall runcff from`any construction activity and any earth surface
disturbed by such activity from the inception of any construction until any construction is complete
and any disturbed earth is returned to a vegetative or other cover commensurate with the intended land
use.
1/ Frequency and sample type to be commensurate with the waste treatment system instituted. .
2/ Applicable to any flow up to and including the flcw resulting from a 24-hour rainfall event with a probable
recurrence interval of once in ten years.
The pil shall not be less than 6.0 s andwA units nor greater tn._n 9.0 standard units a.rd' sh ll b-) monitored
corurensurat:a with th^_ waste trcat;n)ent _:istituted 2/
There shall be no discharge of floating solids or visible foam in ether than trace amounts.
Samples tn�+,n in compliance with the monitoring requirements specified afore shell be taken at the following location(s): ,
Point(s) of: discharge from treatment system.
0
o .v
c�
aN

PART
Page 10 o; 21 •,
Pcrinit No. `;C 00049bl.
S. SCHEDULF OF CO""PLIANCE
1. The permittee snaliachieve compliance ;,ith the effluent lirnit.,tions specified ror
discharg s in aecoraance with the following schedule:
a.Chenicai Waste `lreatttant (001, 002, 004, 005, 006, 007 & 008)
(1) ireatmant scheme - 3/31/75
(2) Start construction -- 3/31/76
(3) Report cre construction progress - 12/31/76
(4) Achiev- operational level - 6/30/77
b.Start biolocical study - 3/31/75 (001)
c.r;chieve cpa::ational level sewage treatment plant - 6/30/ 5(003)
d.yiological. report - 6/30/76 (001)
2. No later than 1'1 calendar days follmvinb a date identified in the above schedule of
compliance, the perinittee shall submit either a report of progress or, in the case of
spcciiic actions being required by identified dates, a written notice of compliance or
noncompliance. In the latter case, the notice sh< l include tl.e cause of noncompliance,
any remedial actions taken, and the probability of meeting the next scheduled
requirement.
2tote: Any construction of new waste treatment facilities or alterations
to existing waste treatment facilities will require a permit or authoriza-
tion For construction in accordance with applicable state law and regulations.

PART i
E•.1 . l l 21((��
i •4'1111:1 �:�: "iC0004961
C. MONII'M"ING AND REPORTING
1. Representative Sarnplinp,
Samples and measurements taken as required herein shall u.presentative o1.
f the volume
and nature of the monitored discharge.
2. Reporting
Nlonitorng results obtained during the previous 3 mc,:_thr stall Y;:-i,YInTnUized for
each month za d reported on a Discharge Ru-ort Form M.`,', 3320-:1t,
postmarked no late: than the 2811h day of the r :ontc foil o%.•in ; the reportinfl:
period. The first report is due on March 31, 1975 Duplicate si .::C-d copse-S of
these, and ali other report: required hcreio, • shall be s�. I,mitted to e Regiol:a'
Administrator and the State at the follovrincf z­Jf,-t:esses:
Regional Administrator
Environmental Protection Agency
1421 Peachtree Street, N.E.
Atlanta, Georgia 30309
S. Dafi.nitions
Dori_^ (. :1: ! iL:%a is -IAce of and
r.I'. c�ource�
P.O. ;'max 27687
°ales c-th %.",-olina 27%�jli
a. The "daily average" concentration means 4:-_.,.y�;
(weighted by :low) of all the daily dote:;.w�L_,_lo:�� of c.�ncentra-
tion made during a calendar month. Daily dete.rMir':R c..s of
concentration made using a coaposite sample small be t i-,~ concen-
tration of the composite sample. t•;hen grab samples are used, the
daily determination of concentration shall 'r,; the grit ..:-tic
average (weighted by flow) of all the saLnp' .s cols: cte' during
that calendar day.
b. The "daily maximum" concentration means the daily deteriaination
of concentration for any calendar day.
c. "Weighted by flow" means the surzaation of each sample concentration
times its respective flow in convenient units divided by the
summation of the flow values.
d. "nekton" means free swimming aquatic ani-als whether of freshwater
or marine origin.
e . For the purpose of this pernit, a calendo r c ; is def .. .i as a -IV
continuous 24-hour period.

y
Permit No. K0004961 r
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to regulation; published
pursuant to Section, 304(g) of the Act, under which such procedures may be required.
5. Recording of Results
For each measurement or sample taken pursuant to the requirements of this permit, the
permiti,<< sh,.,11 record the follovring information:
a. The exact place, date, and time of sampling;
b. The dates the analyses were performed;
c. The person(s) who perfc.—med the analyses;
d. The analytical techniques or met -hods used; arid.
e. The results of all required analyses.
G. Additional vionitorinb by Permittec
If the permittee monitors any pollutant at the locations) csignated he -rein more
frequently than required by this pe_rnit, using approved anal, ticai . �ethodls cs specified
above, the results of stich inonitorh,, shall he inciuded in the calculation aid rel:,o:t.irg of
tine. values required in the Discla<<,e Monitoring Report Foi� ', PrNo. 3320-1). Such
increased frequency shall also be indicated.
7. P.ecordls Retention
All records and information resulting from the monitoring activities required 'by this
permit including cell r'�t:orC13 of analyses performed and calibration and mainte-nance of
instrumentation and recordings from continuous monitoring ins rrarnentat.io.l shall be
retained for a minirnurn of three (3) years, or longer if reque ted by the Regional -
Administrator or the State water pollution control agency.

PART ii
t ;,,.,. 13 21
E'rnui, ":,. NCO004961
C'i:," Discharjc
A" a ._!: ;r ,es authorized herein shall be consistent with the terms and conditions of this
The discharge of any pollutant identified in this permit more frequently than or
i:+ c 'cess of that authorized shall constitute a violation of the permit. I ny
facility expansions, production increases, or process nioQ:f cations which will.
different, or increased discharges of pollutants must I-c reported by
of r: r:e,� i�l'7E5 application or, if such changes wall not Viol the effluent
sne::i" eel i t this permit, by notice to the permit issui :g 4+.ithority of such
_. llov inn such notice, the permit may be modified to specify and limit any
,lot pit .ir,taly li;nited.
_. ':.. -:,:!ioncc i��'��tific�ztior2
If, an—; reason, the permittee does not comply with or will be unable to comply with
maxi2,-iuni effluent limitation specified in this permit, the permittee shall .
it i+jnal :administrator and the State with I the following information, in
_'thin five (5) clays of becoming aware of such condition:
a. cril.tior. of the discharge and cause of noncompliance; and
`.. :iod o_` ::ol�co2?lpliance, including exact dates and times; or, if not corrected,
ti!iini the nnnoornpiiance is expected to :.nntir_:=a and storg lw ing
redu,,,e, eliminate and prevent recurrence of the noncomplying discharge.
". -.- Jl;eration
+Eiittae s?.; ll at all times maintain in good working order and oi,erete as efficiently
ar all treatm- ent or control facilities or systems installed or used by the permittee
tc* ,i _:.i _:ar compliance with the terms and Conditions of this permit.
.. 4�: _ . � f:.n .cct
T,. ; :::;ittee shall tale all reasonable steps to minimize any adverse impact to nat•igable
::: ; - r alt.ing from noncompliance with any effluent limitations specified in this
Ycr::: ., including such accelerated or additional monitoring as necessary to determine the
r:rd impact of the noncomplyinb discharge.
r
.�. :i..r_ion from or bypass of facilities necessary to maintain compliance with the
conditions of this permit is prohibited, except (i) where unavoidable to prevent
or sevlere property daniane, or (ii) where excessive storm drainage or runoff
> as: fa+:il.ities necessary for compliance with the effluent,limitations and
of tl.is permit. The permittee shall promptly notify the Regional
-..tor and d-te State in writing of each such diversion or bypass.

1
Pit Ct l It
1't nnit �,t. hCO00.4961.
Solids, sludges. filter hackwash, or other pollutants removed in the course of treatment. or
control of wastewat,er, shall be of in a M. runner such as to prevent any pollutant
from such materials from entering, navigable waters.
7. Power Failures
In order to maintain co-npliancc with the effluent limitations and prohibitions of this
perma, the permitter,� cithcr:
a. In w'cordance v�,ith the Schedale of Compliance, contained in Part I, provide an
alternp.'Live power source sufficient to operate the wastewater control facilities;
or, if such alternativc po v er source is not in existence, and no date for its implementation
appears in Part I,
b. Halt, reduce or otherwise control production and/or all discharges upon the
reduction, loss, or Liilure of the primary source of power to the wastewater control
facilities.
B. RUSPONSlLII,I`i'IT S
1. Right of Enlry
The permittee shall a_'low the he -ad of the State water pollution control agency, the
Regional Administrato1, and/or their atithorizeri representatives, upon the presentation of
credentials:
a. To enter upon the permittee's premises tivhere an effluent source is located or in
which any records are required to be kept under the terms and conditions of this
permit; and
b. At reasonable times to have access to and copy any records required to be kept under
the terms and conditions of this permit; to inspect any monitoring equipment or
monitoring method required in this permit; and to sample any discharge of pollutants.
2. 7ransfcr of Ownership or Control
In the event of any change in control or ownership of facilities from which th(! authorized
dischaxj;es emanate, the permittee shall notify the succeeding owner or controller of the
existence of this p rrnit by iett:,r, a copy of which shall be forwarded to the Regional
Administrator and the S'.at.e water pollution control agency.
3. AuailcaFlility of Rcjports
Except for data dete►;iiined to be confidential under Section 303 of the- Act, all reports
prepared in accordance vrith the terms of this permit shall be available for public

FAST It
Pa;;e 15 of 21.
Permit No. 1;t,0004961
inspection at the offices of the State water Pollution control agency and the Regional
Administrator. As required by the Act, efflUel!t data shall not be considered confidential.
Knowingly ma ? any false statement on any such report may result in the imposition of
criminal penalties as provided for in Section 309 of the Act;. .
4. Permit llodif cc::cn
After notice and opportunity for a hearing, this permit may be rnodifir-.?, suspended, or
revoked in whole or in part. during its term for cause including, but r:c.t li--n;ted to, the
following:
a. Violation of any terms or conditions of this permit;
b. Obtaining t is permit by misrepresentation or failure to disclose fully all relevant
facts; or
c. A change in any condition that requires either a temporary or pernianent.;eduction or
elimination of the authorized discharge.
5. Toxic Pollutants
Notwithstandin- Part TT, R-4 oho A, if a toXic r f4_'1_itant. e4anrtarrI r r rt n�_i?,itirJr� (i„nts+rti„fi
any schedule of compliance specified in such effluent standard or prohibition) is
established under Section 307(a) of the Act for a toxic. pol.but.alit which is presort in the
discharge and such standard or prohibition is more stringent then any limitation for such
Pollutant in this permit, this perrait shall be revised or modified in accordance with the
toxic effluent standard or prohibition and the permittee so notified.
6. Civil and Crimincl Liability
Except as provided in permit conditions on "Bypassing" (Part II, A-5) and "Power
Failures" (Part Ii, A-7), nothing in this permit shall be construed to relieve the permittee
from civil or criminal penalties for noncompliance.
7. Oil and Hazardous Substance Liability
Nothing in this permit shall be construed to preclude the institution of any legal action or
relieve the per-mittee from any responsibilities, liabilities, or penalties to which the
permittee is or may be subject under Section 311 of the Act.
8. State Laws
Nothing in this permit shall bc� construed to preclude the institution of any Iegal action or
relieve the perrnit.t^e from any responsibilities, liabilities, or penalties established pursuant
to any applicable State law or regulation under authority preserved by Section 510 of the
Act.
0

P..'.1 I
of 2.1
ti. Propert}• Itcg�hts
1 fu' Istillilll(ti' of this perrrtlt doea no!. eonvey any prC!)n:ty rights I!i cil.her reed
property, or any excllisive privilflg(,s, nor does It "Iny M),:: •r Io I).1V.:C pro erf;V
or any invasion of personal rights, nor any infringernenf• of Feden-.-!, .ii or lo•f-: 1 or
rtT,ulatiuns.
I J. crerabitih-
Bahr' PrO:nSions of Chis Pernit are severaI3le, and if any provisinn.. r I -hi.; i)C,•i"..i, Or the
aPpUcation of any pro:kion of this permit to Ri1V ci. cttnistan c,:% i5 held the
application Cif Alich Provision to other circumstances, end the ir.'. of i is i ?lilt,
shall not tie affected thereby.
PART III
�I'1'l;F? REQUIR IE.�TS
A. In the event that waste streams from various sours :s are d
for treatment or discharge, the quantity of each ,-oll.it_artt:
t.vii.Uta_c% i.0 each coatr:01_.:. _
shall not exceed the specified limitation for
B. If the permittee, after monitoring for at least i� ititE: y Oeter--
mines that he is consistently meeting th, effiue.-..'_ l mi 2 ,i�t ,.-i.ned
herein, the permittee may request of- the Regional. =._r?Cnistr-::or that
the monitoring requirements be reduced to a lessee rcqu`n-, or be
eliminated. Upon written notification by the Re`ionai dd!;).-!_;,.-strator,
the permittee will monitor as directed.
C. There shall be no discharge of polyc lotinated bir ,anol ccr--,au-d-s
such as those commonly used for transforTaer fluid.
i,. Not applicable.
t. No discharge of ail and grease shall ;.Snit, in a 'J:.,:.t.L7C sh-,ca -,n the
receiving water body.
G n O 197• - 738-468 I99 REGION MO.
IM

a
Part ITI
Page 17 of 21
Permit No.NC0004961
F. ?n accc.-u'tnce �,it?l Section 31.6(b) of the Act, by March 31, 1975,
tiic t cr::: ttea s,ii;il l cic reign; submit Hpeci fic de lH for review,
;iild approval (rxJ1ow one month for itpproval) by the
f:t gl c;n: i Adr:in I SL r,:tor; and ircplement an approved program Co monitor
nektcn and shclif ic-h it*,pi.ngcd on plant intake structures
coolin^
and
fish e;, >, and lar•: and other organisms entrained by s
rater ._. ste Such study shall be in conformance with "Basic Buide
to thee Dasign of 316 Demonstrations, Region IV EPA (August 7, 1974)."
Unless --�difi.pd 's;y the Regional Administrator, sampling -for the
pr;��io. cf the study shall be performed every two weeks
on a 24-.iour basis on random days and shall include the number,
;;-eig`:t, s_ze, sr!d es and condition of organisms trapped. Sampling
fre:-u: shall be increased during periods of high impingement.
The u- -=•rasa - i11 include sampling variations due to season, time
of da,1gareral climatic conditions, stream flow, tidal variations,
and ct.,e factors.
Unless nodified by toe Regio:al Administrator, sampling for the
e ntrai-. -,en t po'= ticia of the study shall be conducted at a minimum of
one d :_ per tceek for a 24--hour period. Such sampling shall extend
over a : ime 1ii.-:} %i11 encompass periods of spa:, -ring of indigenous
^r ..oric�ds of hjoh biological pro ucti.vity.
Durir:g this study "iod the permittee is encouraged to experiment
.ai t c.•stenu, ni-,tr,oes or procedures to minimize impingement and
entrq''-.ent effccta. By June 30, 1976, the permittee shall
sib ;_r i s1u:u,:ary report to the Regional Administrator and State
Diracter as to the effects of the present cooling water intake with
regard to Section 316(b) of the'Act. if significant impingement
and e:::rainment is still occurring, this report shall include:
1. :n evaluation of facility or procedure modifications
(includiug off -stream cooling if necessary) to mini-
mize the environmental impact of the cooling water
intake,
2. An evaluation of methods to return viable nekton and
shellfish collected on the intake screens to ambient
temperature water at a point outside the influence of
the plant intake and discharge, and
3. ?roao, d fL;cilities or modifications with attendant
implerr� 7-,Ca ion scheuu'•.e(s) for implementing 1 and/or
2 above.
Upon t,e direction of the Regional Administrator, the permittee shall
im:,p12,7=nt cons ruction of approved facilities in conformance with an
approV�?.j imple-:P_nL?tion schedule.

Page 18 of 21 c
Penni_t No. NC000/+951
1.;,rid,'.T- 1.1�: ott)c'r pr(•i'_E:1.Cns. of, this rermiLy the State of North Ccaroi.lna w
S ttte: f ' `.'l.i�^iiwtl0:. o4 certification pursu,.V t to Section 401
C> i. t:c 1 Ct o
_o r - `t'=o_]lnf_i_:'�:ui.1_r:'ments
for
Sewaue J'reatr..ent
P.I: Itk's)
FINAL
I'recluenc y
Type
S.,roli_n
Point
l}=
Crab
Ef {1t,elit
;;a,:,;ra
Daily
Crab
Effluent
E s .:'ttal C1
Da-; ly
Crab
Effluent
4i
QI:artcrly
Composite
Ir:flucnt,
Efflu_iiL
BO))
Quarterly
Composite:
La.-J.uent,
Effluent
CO:�
Q::arterl�.
Comoo. ite
Ef Meat
iotz:= i:es:_d e
Annually
Composite
Influent,
Effluent
ict_c_l Suss ^adt, _;:i due
nnuall.y
Composite
Infl_ue-,i ,
Effluent
Tot<(1 i:jelcii;_' i;it:dc,eri
!;inually
Composite
Influent,
M _,ent
is?E' c_:i,`1.� t:'i i;],n r,,onitorino in accordance Sd;.tit the final schedule on
E Of i1• t 1 Cj' Itl� impose F.aditl0ilc7i T:Gi,l.tor121g requirements In
ac, : i ztion�
Gress effluent 1, itations provided hereir. may be appl.Led on a net
basis for any waste streami, if:
1. the permittee provides proof that the difference
between net and gross application of the .limitations
is of r:iajor significance to -the permittee in terms
of the cost or technical feasibility of achieving
the prescribed levels of treatment,
2. the pollutants discharged do not vary significantly,
either chemically or biologically, from pollutants
found in the applicant's water supply,
3. the net reporting is based on the level of pollutants
present in such water after any i,,ater supply treatment
steps are performed,
4. adequate intake and discharge monitoring is provided
to assijre statistical reliability of the net pollutant
discharges, and
5. monitoring reports include both influent and effluent
data.

2 C crul Oak u r pnz,! C:L
L s
-cm
-anvi AlIntuht vivch� 171
C11,11 E. z 1,; w2
t'Lc
rc sy "C tcp t'l
KnItatAnn, in that S,
Yr fan 0
jj L,j fZj al StCty of North Can�jjnn Cnr7&0j05 that Vore arc
F-r-,
ch P? To
7 zynm -os that a F3 Q sh Du i nZ (am h c T.adc Fc�.
L: s v 1 0 c i t ic 0 wr 7 c 7 1. Mon z A s c z 1 bc 6
I

PAR1 IIT
a
Page 20 of 21
Perm:t No. N00004961
r.. ,-n .-.n r1.Tt 1�. �: �:�lla
0 i7- ll_:S C�
SU�:Tr'�Ci 'Duke Pore, Cc:m;pany
i�T� .t, ;.-ri
; ::,... _
- l"_:iicl J:.c:"i.;. v':.ut1Qn .
•�r, . Cam- ty tr �,`-1
. Gaston County, , ..� o� ai Carolina
arc c�c Q�
_ t,:•e ,� �_irz Iz I.atid La!-. e i_: asureu ircrt .e Ga6,ton Cou�,t;
_ -
- i,e r,• ,,,. �tat.ic' .*,take to the Mount;:i
_� _ .� ice:,- i ,:�� -� r_is a scb�:: 'c:.� e-,clir,n on outl.'_ning the
��:«.`-'_.�.:' Of th;_... ..�i:,_ -> �,v?=�'_� %h^ 'Ce""'�Cl'e`:'_LL•i^C C� j:}:`.'.
,; tram 5`,1' above natural temperatures any:

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