NC0004961_Regional Office Historical File Pre 2018 (6)

NPDES WASTE LOAD ALLOCATION -1
PERMIT NO.:NC0004961 odeler Date Rec. Number# v-'
PERMITTEE NAME: DUKE POWER J t,&0 z I z it, %k i,c,
•
FACILITY NAME:RIVERBEND STEAM STATION Drainage Area(mi2) Ig0O Avg. Streamflow (cfs) 2700
FACILITY STATUS: EXISTING 7Q10(cfs) 80 Winter 7Q10 30Q2(cfs)
PERMIT STATUS:RENEWAL Toxicity Limits: IWC /0 % Acute(chronic)
MAJOR: X MINOR: Instream Monitoring:
PIPE NUMBER:0M
DESIGN CAPACITY:N/A Parameters:
DOMESTIC(%of Flow):0% Upstream Location:
N.C. DEFT. OF
INDUSTRIAL(%of Flow):100% E RONMENT, HE A I,TH, Downstream Location:
& NATURAL RES:)URCFS
COMMENTS: JUL 25 1996 Faxmaziadetunim __ t..._._--
Monthly Average Daily Max. WQ or EL
Wasteflow(MGD) NA
BMW OF E!`'7,0r1;T AE •AnSEMEIIT TSS(mg/1): 23 75 BPT(1989)
µpgR,;V iLE REp!SNAE OFFICE (1989)
Tonal Copper(mg/1): 11 15 BAT(1989)
Total Iron(mg/l): 1 1 BAT(1989)
pH(SU): 6-9
Arsenic(µg/l): Qrtrly monitoring
Selenium(µg/1): Qrtrly monitoring
RECEIVING STREAM: CATAWBA RIVER Total Phosphorus(mg/1): Monthly monitoring
Total Nitrogen(mg/1): Monthly monitoring
CLASS: WS-IV AND B .
t
SUB-BASIN 03-08-33
._
REFERENCE USGS QUAD: F15SW (Please attach map)
COUNTY: GASTON
REGIONAL OFFICE:MOORESVILLE REGIONAL OFFICE f
PREVIOUS EXPRATION DATE:7/31/96 TREAT.PLANT CL:I
CLASSIFICATION CHANGES WITHIN THREE MILES: WS-IV ONLY(NO B)
FROM POINTS UPSTREAM TO RIVERBEND INTAKE AND DOWNSTREAM COMMENTS:
FROM MOUNTAIN ISLAND DAM
REQUESTED BY; -f'e ✓,�, --- DATE:. -/�1/.((6
PREPARED BY. &. louaL DATE:, 7f zi Pb
REVIEWED B 'rl1m.► i�!u!.�:... D TE:
7 /7_ q(2--- -

FACT SHEET FOR WASTELOAD ALLOCATION
Request# 8466
Facility Name: Duke Power Co- Riverbend Steam Station Outfall 002 ..
NPDES No.: NC0004961 ;r
Type of Waste: Industrial-99.95% - Domestic 0.05% & r::,.-r c:. ;.
Facility Status: Existing
Permit Status: Renewal APR 4 1;S.6
Receiving Stream: Catawba River
Stream Classification: WS-IV &B
Subbasin: 030833 -,. ',.L CFFI E.
County: Gaston Stream Characteristic:
Regional Office: Mooresville "Sir USGS #
Requestor: Clark Date: `h
Date of Request: 3/21/96 Drainage Area(mi2): 1800
Topo Quad: ' F15SW Summer 7Q10 (cfs): 80
N.C. DEPT. Of Winter 7Q10(cfs): 70 ..
Er v1RONMENT. HEALTH, Average Flow (cfs): 2700 ;1 � '. ;
NATURAL h'?$ )t 1 RCL�S 30Q2 (cfs): n,
JUL 25 1996 IWC (%): 10 y -c. =; ..
v
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DIVISION OF [NV,!'?CN'MEN I^.L VVIACEMENT c •-i
Wasteload Allocation SummESVKLE REGIuNAL OFFICE
(approach taken,correspondence with region, EPA,etc.)
Ash basin discharge with coal pile runoff,domestic ww,stormwater runoff,metal cleaning
wastes, and ash transport water. Recommend renewal of existing NPDES permit limits w/
modification of monitoring frequency for arsenic and selenium. Arsenic limit will be deleted and
changed to quarterly monitoring. Monthly monitoring for selenium will be changed to quarterly
monitoring.
Special Schedule Requirements and additional comments from Reviewers:
Gi/-ty ,MYk'Y-- —Wftie/}M oft r;,QuS GGti/rot,
1-no o= co A)(..44 0 r;ta &L, ,-Jy floth rght.x, sex_ . SE. 6ezibtAlpVio frik .Y•
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Ef c_t'i r rri2 re
Recommended by: . 44,r,Y-' Date:3/27/96
Reviewed by
Instream Assessment: �CZ'Z Li's- (,„ ltL Date:/ I I (!'
Regional Supervisor:_' ( � /). / (C'f // Date: 1-AO 6
Permits&Engineering: ) '7 f i Date: `f/Z /y6
RETURN TO TECHNICAL SUPPORT BY:
P 3 0 1996
'1 %,,,.� v.� w•-' 1 cv- ���cp MLam;

2
TOXICS/METALS/CONVENTIONAL PARAMETERS
Type of Toxicity Test: Chronic Ceriodaphnia Qrtrly
Existing Limit: 10%
Recommended Limit: 10%
Monitoring Schedule: JAN APR JUL OCT
Existing Limits
Monthly Avg. Daily Max.
Wasteflow(MGD) NA
TSS (mg/1): 23 75
Oil&Grease(mg/1): 11 15
Total Copper(mg/1): 1 1
Total Iron(mg/1): 1 1
pH(SU): 6-9
Arsenic(1.tg/1): 480
Selenium(1ig/1): Monthly monitoring
Total Phosphorus(mg/1): Monthly monitoring
Total Nitrogen(mg/I): Monthly monitoring
Recommended Limits
Monthly Average Daily Max. WQ or EL
Wasteflow(MGD) NA
TSS (mg/1): 23 75 BPT(1989)
Oil&Grease(mg/1): 11 15 BPT(1989)
Total Copper(mg/1): 1 1 BAT(1989)
Total Iron(mg/1): 1 1 BAT(1989)
pH(SU): 6-9
Arsenic(14/1): Qrtrly monitoring
Selenium(11g/1): Qrtrly monitoring
Total Phosphorus(mg/1): Monthly monitoring
Total Nitrogen(mg/I): Monthly monitoring
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification 7
Relocation of discharge I �a�=o" �
Change in wasteflow Y
Newjrr treatment informtation—-----�
Other(onsite toxicity study;interaction,etc.) As, Se,
_X_ Parameter(s)are water quality limited. For some parameters,the available load capacity of the immediate
receiving water will be consumed. This may affect future water quality based effluent limitations for additional
dischargers within this portion of the watershed.
OR
No parameters are water quality limited,but this discharge may affect future allocations.

3
INSTREAM MONITORING REQUIREMENTS
Upstream Location:
Downstream Location:
Parameters:
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION&SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes i % No
If no,which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate?Yes No ✓
If yes, please provide a schedule (and basis for that schedule)with the regional
office recommendations:
If no, why not?
gwe' re f ued c iye4 ,
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (Y or N)
(If yes,then attach schematic, toxics spreadsheet,copy of model, or, if not modeled, then old
assumptions that were made, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes,explain with attachments.

Facility Name_Duke Power-Riverbend Steam Station Permit# NC0004961 Pipe#_002_
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnii chronic effluent bioassay procedure (North Carolina Chronic Bioassay
Procedure- Revised *September 1989) or subsequent versions.
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 Quarter(v monitoring using this procedure to establish compliance with the permit condition. The first
test will be performed after thirty days from the effective date of this permit during the months of
_JAN APR JUL OCT .. 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 Form AT-1 (original)is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should 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 80 (min. rel. )_cfs
Permitted Flow _NA_ MGD ommended by:
IWC _ 10 % ABasin & Sub-basin _CTB33 at.. ,
Receiving Stream _Catawba River
County _ Gaston ate _ 3/17/?'
QCL P/F Version 9/91

Page 1
Note for Jackie Nowell
From: Carla Sanderson
Date: Mon,May 6, 1996 5:03 PM
Subject: RE: Duke Power Riverbend
To: Paul Clark
cc: Dave Goodrich;Jackie Nowell; Ruth Swanek; Susan Wilson
Paul- (this is a long one) At this point,I do not agree with keeping the monitoring
frequencies at monthly for arsenic and selenium. Jackie ran the toxics reasonable potential
analysis for these parameters and monitoring (quarterly)came up the recommendation. The
allowable concentration for arsenic is 480 ug/1 with the predicted value of 198 ug/1. The
allowable concentration for selenium is 48 ug/1 with a predited value of12 ug/l. We have
been requesting quarterly monitoring for parameters(other than action levels)that do not
need limits because this frequency will provide sufficient data at the next permit review to run
through the reasonable potential analysis. Paul,if your concern with this reduced
monitoring is due to going from a high frequency(dictated by the limits for these paramters)
to the much lower frequency,then maybe we should discuss this further.
Our standard operating procedure for toxics is currently under review and it may incorporate
changes in monitoring recommendations for parameters of concern for different facilities.
But until we change the way we review all facilities,we need to continue to be consistent.
If a decision is made to treat discharges in the lake-like areas of the Catawba River as if
mixing is minimal(i.e. acute conditions should be protected) then we will need to set
different recommendations for other discharges as well.
Determining the use of mixing zones or no mixing zones to protect against acute criteria is a
major topic for discussion and will also be incorporated into the SOP.
Let me know if you have any further questions or concerns about this one. Thanks!
From: Paul Clark on Thu,May 2, 1996 3:39 PM
Subject: Duke Power Riverbend
To: Jackie Nowell
Cc: Carla Sanderson; Dave Goodrich; Susan Wilson
The following is copied from my summary notes for the Duke Power Riverbend Steam
Station draft permit package(which I will give to Susan W. at the end of today).
Let's resolve - as you can see,I lean in one direction and then the other.
3.WLA recommends reducing Arsenic and Selenium monitoring from quarterly to monthly.
Do not agree with recommendation. Arsenic and Selenium concentrations discharged are
near or greater than water quality standards for these parameters. Although Catawba River
has 7Q10S=80 cfs and IWC=10%,the river is a lake at the discharge location and mixing is
likely to be minimal. If State decides to proceed with quarterly monitoring for Arsenic and
Selenium, monitoring should be coordinated with toxicity monitoring.
The facility has passed all their toxicity tests from 1992-present except for 10/92. Toxicity
results lend support to reduced Arsenic and Selenium monitoring. Perhaps modeling and

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MII{$ION OF E!i,;�?nr�,fF.fNi'Al 03 ,�+ f
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C �; 1989 r: °'erg
MOOFEss aE
REGIONAL Off1G@
State of North Carolina
Department of Environment, Health, and Narural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Caro. -a 2 T c 11
: James G. Martin Governor November 30, 1989 R. Paul Wilms
William W. Cobey. Jr., Secretary Director
Mr. William 0. Parker, Jr. v
P.O. Box 367
Mount Holly, NC 28120 ^ �J
Subject: Permit No. NC: : '=961
Duke Power Co. -R-verbend
Gaston County
Dear Mr. Parker :
In accordance with your application for discharge per:.: received on February
23, 1989, we are forwarding herewith the subject State - NPT permit. This permit is
issued pursuant to the requirements of North Carolina Genera_ Statute 143-215. 1 and
• the Memorandum of Agreement between North Carolina and the Environmental Protection
Agency dated December 6, 1983.
•
If any parts, measurement frequencies or sampling rec :_renents contained in
this permit are unacceptable to you, you may request a waiver cr modification pursuant
to Regulation 13 NCAC 2B .0508(b) by written request to the ::rector identifying the
specific issues to be contended. Unless such request is mac_ :it -:in 30 days following
receipt of this permit, this permit shall be final and bind- Should your request
be denied, you ::ill have the right to request an adjudicator.: hearing.
Please take notice that this permit is not transf-erar:e. Fart II, D. 3.
addresses the requirements to be followed in case of change ownership or control of
this discharge.
This permit does not affect the legal requirements t- __ tarn other permits
which may be required by the Division of Environmental Mana =-e: : or permits required
by the Division of Land Resources, Coastal Area Management: A7= any other Federal or.
Local governmental permit that may be required.
If you have any questions concerning this permit, pl s- --_,tact Ms. Lula
Harris at telephone number 919/733-5083.
Sincerely,
Original Signed By
Donald Safrit for
R. Paul Wilms
cc: Mr. Jim Patrick, EPA
e
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone -- ...
•
An Equal Opportunity Affirmative Action Employe:

Permit No. NC0004961
l
STATE OF NORTH CAROLINA
DEPARTMENT OF NATURAL RESOURCES AND COMMUNITY DEVELOPMENT
DIVISION OF ENVIRONMENTAL MANAGEMENT
PERMIT
To DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215. 1,
other lawful standards and regulations promulgated and adopted by the North Carolina
Environmental Management Commission, and the Federal Water Pollution Control Act, as
amended,
Duke Power Company
is hereby authorized t: discharge wastewater from a facility loca_ed 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 r.equirerents, and other
conditions set forth in Parts I, II, and III hereof.
This permit shall becone effective December 1, 1989
This permit and the a._:horization to discharge shall expire at -_dnight on November
30, 1994
Signed this day Noveml`=r 30, 1989
Original Signed Fay
1. I Donald Safrit for
R. Paul Wilms, Director
Division of Environmental Management
By Authority of the Environmental Maragernent Commission

•
Permit No. NC0004961
SUPPLEMENT TO PERMIT COVER SIIEET
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.

I i ±_I ±
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KITED STATES
ENT OF THE INTERIOR
,LOGICAL SURVEY
485,
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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/day Other Units (Specify) Measurement Sample *Sample
Monthly Avg. Daily. Max. Month y Avg. Daily Max. Frequency Type Location
Flow Daily Pump log or E
similar reading
Temperature °C(oF) 35(95) Daily 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 32°C (89.6°F) .
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 numbers) 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 Type Location
Flow Weekly Pump logs or E
Similar readings
Total Suspended Solids 23.0 mg/1 75.0 mg/1 2/month***** Grab E
Oil and Grease 11 .0 mg/l 15.0 mg/I 2/month***** Grab F.
Total Copper 1 .0 mg/1 1 .0 mg/1 /monib Grab E
Total Iron 1 .0 mg/1 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 (NO + NO + TKN) Monthly Grab E
Total Phosphorus 2 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 of 43 mg/1 is permitted provided that the permittee can satisfactorily demonstrate that the
difference between 23 mg/1 and 43 mg/1 is due to the concentration of total suspended solids in the source body.
**** See Part III, Condition R.
i
*A*AA 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 I
B. Schedule of Compliance
1. The permittee shall comply with Final Effluent Limitations specified for
discharges in accordance with the following schedule:
Permittee shall comply with Final Effluent Limitations by the effective
date of the permit.
2. Permittee shall at all times provide the operation and maintenance
necessary to operate the existing facilities at optimum efficiency.
3. 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 schedule
requirements.

Part II
Page 1 of 14
PART II
STANDARD CONDITIONS FOR NPDES PERMITS
SECTION A. GENERAL CONDITIONS
1. Duty to Comply
The permittee must comply with all conditions of this permit. Any permit
noncompliance constitutes a violation of the Clean Water Act and is grounds
for enforcement action; for permit termination, revocation and reissuance,
or modification; or for denial of a permit renewal application.
2. Penalties for Violations of Permit Conditions
Any person who violates a permit condition is subject to a civil penalty not
to exceed $10,000 per day of such violation. Any person who willfully or
negligently violates a permit condition is guilty of a misdemeanor punishable
by a fine not to exceed $15,000 per day of violation, or by imprisonment
not to exceed six months or both.
3. Duty to Mitigate
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 accelerated or additional monitoring as
necessary to determine the nature and impact of the noncomplying discharge.
4. Permit Modification
After notice and opportunity for a hearing pursuant to NCGS 143-215. 1(b)
(3) 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;
c. A change in any condition that requires either a temporary or permanent
reduction or elimination of the authorized discharge; or
d. Information newly acquired by the Division indicating the discharge poses
a threat to human health or welfare.
If the permittee believes that any past or planned activity would be cause for
modification or revocation and reissuance, the permittee must report such
information to the Permit Issuing Authority. The submittal of a new application

Part II
Page 2 of 14
may be required of the permittee. The filing of a request by the permittee for
a permit modification, revocation and reissuance, or termination, or a
notification of planned changes or anticipated noncompliances, does not stay
any permit condition.
5. Toxic Pollutants
Notwithstanding Part II, A-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.
The permittee shall comply with effluent standards or prohibitions established
under Section 307(a) of the Clean Water Act for toxic pollutants within the
time provided in the regulations that establish those standards or prohibitions,
even if the permit has not yet been modified to incorporate the requirement.
6. Civil and Criminal Liability
Except as provided in permit conditions on "Bypassing" (Part II, B-3) and
"Power Failures" (Part II, B-6), 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
]43-215.75 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.

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Page 3 of 14
9. Onshore of 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.
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 circumstances,
is held invalid, the application of such provision to other circumstances, and
the remainder of this permit, shall not be affected thereby.
11 . Duty to Provide Information
The permittee shall furnish to the Permit Issuing Authority, within a reason-
able time, any information which the Permit Issuing Authority may request
to determine whether cause exists for modifying, revoking and reissuing,
or terminating this permit or to determine compliance with this permit. The
permittee shall also furnish to the Permit Issuing Authority upon request,
copies of records required to be kept by this permit.
SECTION B. OPERATION AND MAINTENANCE OF POLLUTION CONTROLS
1. Proper Operation and Maintenance
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.
2, Need to Halt or Reduce not a Defense
It shall not be a defense for a permittee in an enforcement action that it
would have been necessary to halt or reduce the permitted activity in
order to maintain compliance with the condition of this permit.
3. 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;
h. The frequency, duration and quantity of flow from each sewer system
bypass or overflow.

Part II
Page 4 of 14
This requirement is waived where infiltration/inflow analyses are scheduled
to be performed as part of an Environmental Protection Agency facilities
planning project.
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 division from or
bypass of facilities.
4. Upsets
"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 operation. An upset
constitutes an affirmative defense to an action brought for noncompliance
with such technology based permit limitation if the requirements of 40 CFR S
122.41(n)(3) are met.
5. Removed Substances
Solids, sludges, filter backwash, or other pollutants removed in the course of
treatment or control of wastewaters shall be disposed of in accordance with
NCGS 143-215. 1 and 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.
6. Power Failures
The permittee is responsible for maintaining adequate safeguards as required
by DEM Regulation, Title 15, North Carolina Administrative Code, Subchapter 2H,
.0124 Reliability, 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.
SECTION C. MONITORING AND RECORDS
1. Representative Sampling
Samples collected and measurements taken, as required herein, shall be
characteristic of the volume and nature of the permitted discharge. Samples
collected at a frequency loss than daily shall be taken on a day and time that
is characteristic of the discharge over the entire period which the sample
represents. All samples shall be taken at the monitoring points specified in
this permit and, unless otherwise specified , before the effluent joins or is
diluted by any other wastestream, body of water, or substance. Monitoring points
shall not be changed without notification to and the approval of the Permit
Issuing Authority.

Part II
Page .5 of 14
2. Reporting
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
ATTENTION: Central Files
Post Office Box 27687
Raleigh, North Carolina 27611
3 Flow Measurements
Appropriate flow measurement devices and methods consistent with accepted
scientific practices shall be selected and used to insure the accuracy and
reliability of measurements of the volume of monitored discharges. The
devices shall be installed, calibrated and maintained to insure that the
accuracy of the measurements are consistent with the accepted capability of
that type of device. Devices selected shall he capable of measuring flows
with a maximum deviation of less than + 10% from the true discharge rates
throughout the range of expected discharge volumes. Once-through condenser
cooling water flow which is monitored by pump logs, or pump hour meters as
specified in Part I of this permit and based on the manufacturer's pump
curves shall not be subject to this requirement.
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to the EMC
regulations published pursuant to NCGS 143-215.63 et seq, the Water and Air
Quality Reporting Acts, 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.
To meet the intent of the monitoring required by this permit, all test
procedures must produce minimum detection and reporting levels that are below
the permit discharge requirements and all data generated must be reported down
to the minimum detection or lower reporting level of the procedure. If no
approved methods are determined capable of achieving minimum detection and
reporting levels below permit discharge requirements, then the most sensitive
(method with the lowest possible detection and reporting level) approved method
must he used.

Part II
Page 6 of 14
5. Penalties for Tampering
The Clean Water Act provides that any person who falsifies, tampers with, or
knowingly renders inaccurate, any monitoring device or method required to be
maintained under this permit shall, upon conviction, by punished by a fine of
not more than $10,000 per violation, or by imprisonment for not more than
six months per violation, or by both.
6. 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 by the
permittee. 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.
7. 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;
c. The person(s) who performed the analyses; and
d. The results of such analyses.
8. 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.

Part II
Page 7 of 14
SECTION D. REPORTING 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. Anticipated Noncompliance
The permittee shall give notice to the Permit Issuing Authority of any planned
change in the permitted facility or activity which may result in noncompliance
with permit requirements. Any maintenance of facilities, which might
necessitate unavoidable interruption of operation and degradation of effluent
quality, shall be scheduled during noncritical water quality periods and carried
out in a manner approved by the Permit Issuing Authority.
3. 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.
4. ' 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.
5. Averaging of Measurements
Calculations for limitations which require averaging of measurements shall
utilize an arithmetic mean unless otherwise specified by the Permit Issuing
Authority in the permit.

Part II
Page 8 of 14
6 . Noncompliance Notification
The permittee shall report by telephone to either the central office or the
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 .
,• , ' 9
b . Any r_ ocess unit failure , due to known or unknown reasons , 4 r ' ;, '`
the facilityincapable of adequate wastewater treatment sti . .; , :;
or electrical failures of pumps , aerators , compressors , etc }J ;� . ; ., �; r r .
'1
station , sewer line , or treatment , ;!' '' �` t
c . Any failure of a pumping � � b ����/ tiL4'"
resulting in a by -pass directly to receiving waters withou _ , ' :: r:
of all or any portion of the influent to such station or f << •
d . Any time that self - monitoring information indicates that t
gone out of compliance with its NPDES permit limitations .
Persons reporting such occurrences by telephone shall also file a written
report in letter form within 15 days following first knowledge of the
occurrence .
7 . Changes in Discharges of Toxic Substances:
The permittee shall notify the Permit Issuing Authority as soon as it knows or
has reason to believe :
a . That any activity has occurred or will occur which would result in the
discharge , on a routine or frequent basis , of any toxic substance ( s ) ( listed
at 40 CFR S 122 , Appendix D , Table II and III ) which is not limited in the
permit , if that discharge will exceed the highest of the following
"notification levels " .
( 1 ) One hundred micrograms per liter ( 100 ug/ 1 ) ;
( 2 ) Two hundred micrograms per liter ( 200 ugh ]. ) for acrolein and
acrylonitrile ; five hundred micrograms per liter ( 500 ug/ 1 )
for 2 , 4 - dinitrophenol and for 2 -methyl - 4 , 6 - dinitrophenol ; and one
milligram per liter ( 1 mg/ 1 ) for antimony ; or
( 3 ) Five ( 5 ) times the maximum concentration value reported for that
pollutant ( s ) in the permit application .

Part II
Page 9 of 14
b. That any activity has occurred or will occur which would result in any
discharge, on a non-routine or infrequent basis, of a toxic pollutant
(listed at 40 CFR S 122, Appendix D. Table II and III) which is not
limited in the permit, if that discharge will exceed the highest of the
following "notification levels":
(1) Five hundred micrograms per liter (500 ug/l);
(2) One milligram per liter (1 mg/1) for antimony; or
(3) Ten (10) times the maximum concentration value reported for that
pollutant(s) in the permit application.
8. 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.
9. Signatory Requirements
All applications, reports, or information submitted to the Permit Issuing
Authority shall be signed and certified.
a. All permit applications shall be signed as follows:
(1) For a corporation: by a responsible corporate officer. For the
purpose of this Section, a responsible corporate officer means:
(a) a president, secretary, treasurer or vice president of the
corporation in charge of a principal business function, or any
other person who performs similar policy or decision making
functions for the corporation, or (b) the manager of one or more
manufacturing production or operating facilities employing more
than 250 persons or having gross annual sales or expenditures
exceeding 25 million (in second quarter 1980 dollars), if authority
to sign documents has been assigned or delegated to the manager in
accordance with corporate procedures.
(2) For a partnership or sole proprietorship: by a general partner or
the proprietor, respectively; or
(3) For a municipality, State, Federal, or other public agency: by either
a principal executive officer or ranking elected official.

Part II
Page 10 of 14
b. All reports required by the permit and other information requested by the
Permit Issuing Authority shall be signed by a person described above or by
a duly authorized representative of that person. A person is a duly
authorized representative only if:
(1) The authorization is made in writing by a person described above;
(2) The authorization specified either an individual or a position having
responsibility for the overall operation of the regulated facility or
activity, such as the position of plant manager, operator of a well or
well field, superintendent, a position of equivalent responsibility,
or an individual or position having overall responsibility for environ-
mental matters for the company. (A duly authorized representative
may thus be either a named individual or any individual occupying a
named position. ); and
(3) The written authorization is submitted to the Permit Issuing Authority.
c. Certification. Any person signing a document under paragraphs a. or b. of
this section shall making the following certification:
"I certify, under penalty of law, that this document and all attachments
were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the
information submitted. Based on my inquiry of the person or persons who
manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and
believe, true, accurate, and complete. I am aware that there are
significant penalties for submitting false information, including the
possibility of fines and imprisonment for knowing violations."
10. 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.
11. Penalties for Falsification of Reports
The Clean Water Act provides that any person who knowingly makes any false
statement, representation, or certification in any record or other document
submitted or required to be maintained under this permit, including monitoring
reports or reports of compliance or noncompliance shall, upon conviction, be
punished by a fine of not more than $10,000 per violation, or by imprisonment
for not more than six months per violation, or by both.

Part II
Page 11 of 14
SECTION E. DEFINITION
1. Permit Issuing Authority
The Director of the Division of Environmental Management.
2. DEM or Division
Means the Division of Environmental Management, Department of Natural
Resources and Community Development. 3. EMC:
Used herein means the North Carolina Environmental Management Commission.
3. EMC
Used herein means the North Carolina Environmental Management Commission.
4. Act or "the Act"
The Federal Water Pollution Control Act, also known as the Clean Water Act, as
amended, 33 USC 1251, et. seq.
5. Mass/Day Measurements
a. The "monthly average discharge: is defined as the total mass of all
daily discharges sampled and/or measured during a calendar month on
which daily discharges are sample and measured, divided by the number
of daily discharges samples and/or measured during such month. It is
therefore, an arithmetic mean found by adding the weights of the
pollutant found each day of the month and then dividing this sum by
the number of days the tests were reported. The limitation is
identified as "Monthly Average" in Part I of the permit.
b. The "weekly average discharge" is defined as the total mass of
all daily discharges sampled and/or measured during the calendar week
(Sunday-Saturday) on which daily discharges are sampled and measured,
divided by the number of daily discharges samples and/or measured
during such week. It is, therefore, an arithmetic mean found by
adding the weights of pollutants found each day of the week and then
dividing this sum by the number of days the tests were reported. This
limitation is identified as "Weekly Average" in Part I of the permit.
c. The "maximum daily discharge" is the total mass (weight) of a
pollutant discharged during a calendar day. If only one sample is
taken during any calendar day the weight of pollutant calculated from
it is the "maximum daily discharge." This limitation is identified as
"Daily Maximum," in Part I of the permit.

Part II
Page 12 of 14
d. The "average annual discharge" is defined as the total mass of all daily
discharges sample and/or measured during the calendar year on which daily
discharges are sampled and measured, divided by the number of daily
discharges sampled and/or measured during such year. It is, therefore, an
arithmetic mean found by adding the weights of pollutants found each day of
the year and then dividing this sum by the number of days the tests were
reported. This limitation is defined as "Annual Average" in Part I of the
permit.
6. Concentration Measurement
a. The "average monthly concentration," other than for fecal coliform
bacteria, is the sum of the concentrations of all daily discharges
samples and/or measured during a calendar month on which daily discharges
are sampled and measured, divided by the number of daily discharges sampled
and/or measured during such month (arithmetic mean of the daily
concentration values). The daily concentration value is equal to the
concentration of a composite sample or in the case of grab samples is the
arithmetic mean (weighted by flow value) of all the samples collected
during that calendar day. The average monthly count for fecal coliform
bacteria is the geometric mean of the counts for samples collected during a
calendar month. This limitation is identified as "Monthly Average"
under "Other Limits" in Part I of the permit.
b. The "average weekly concentration," other than for fecal coliform bacteria,
is the sum of the concentrations of all daily discharges sampled and/or
measured during a calendar week (Sunday/Saturday) on which daily discharges
are sampled and measured divided by the number of daily discharges sampled
and/or measured during such week (arithmetic mean of the daily
concentration values). The daily concentration value is equal to the
concentration of a composite sample or in the case of grab samples is the
arithmetic mean (weighted by flow value) of all the samples collected during
that calendar day. The average weekly count for fecal coliform bacteria is
the geometric mean of the counts for samples collected during a calendar
week. This limitation is identified as "Weekly Average" under "Other
Limits" in Part I of the permit.
c. The "maximum daily concentration" is the concentration of a pollutant
discharge during a calendar day. If only one sample is taken during any
calendar day the concentration of pollutant calculated from it is the
"Maximum Daily Concentration". It is identified as "Daily Maximum" under
"Other Limits" in Part I of the permit.

Part II
Page 13 of 14
d. The "average annual concentration," other than for fecal coliform bacteria,
is the sum of the concentrations of all daily discharges sampled and/or
measured during a calendar year on which daily discharges are sampled and
measured divided by the number of daily discharges sampled and/or measured
during such year (arithmetic mean of the daily concentration values). The
daily concentration value is equal to the concentration of a composite
sample or in the case of grab samples is the arithmetic mean (weighted by
flow value) of all the samples collected during that calendar day. The
average yearly count for fecal coliform bacteria is the geometric mean
of the counts for samples collected during a calendar year. This
limitation is identified as "Annual Average" under "Other Limits" in Part I
of the permit.
e. The "daily minimum concentration" (for dissolved oxygen only) is the
minimum allowable amount of dissolved oxygen required to be available in
the effluent prior to discharge. It is identified as "Daily Minimum" under
"Other Limits" in Part III of the permit.
7. Other Measurements
a. Flow, (MGD): The flow limit expressed in this permit is the 24 hours
average flow, averaged monthly. It is determined as the arithmetic mean
of the total daily flows recorded during the calendar month.
b. An "instantaneous flow measurement" is a measure of flow taken at the time
of sampling, when both the sample and flow will be representative of the
total discharge.
8. Types of Samples
a. 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.
b. Grab Sample: Grab samples are individual samples collected over a
period of time not exceeding 15 minutes; the grab sample can be taken
manually.

Part II
Page 14 of 14
9. Calculation of Means
a. Arithmetic Mean: The arithmetic mean of any set of values is the summation
of the individual values divided by the number of individual values.
b. 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).
c. Weighted by Flow Value: Weighted by flow value means the summation of each
concentration times its respective flow divided by the summation of the
respective flows.
10. Calendar Day
A calendar day is defined as the period from midnight of one day until midnight
of the next day. However, for purposes of this permit, any consecutive 24-hour
period that reasonably represents the calendar day may be used for sampling.
11. Hazardous Substance
A hazardous substance means any substance designated under 40 CFR Part 116
pursuant to Section 311 of the Clean Water Act.
12. Toxic Pollutant
A toxic pollutant is any pollutant listed as toxic under Section 307(a)(1) of
the Clean Water Act.
Revised 6/89

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-44 of North Carolina General Statutes, the permittee
shall employ a certified wastewater treatment plant operator in responsible
charge (ORC) 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. The
permittee shall notify the Division's Operator Training and Certification
Unit within five days of any change in the ORC status.
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.
The permit as modified or reissued under this paragraph shall also contain any
other requirements in the Act then applicable.

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 fcr
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 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 conbusticn
{'{ turbine cooling water discharges are permitted without limitations cr
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 cr
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, Ir.::
are not limited to: Wastewater from wet scrubber air pollution contrc
•
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 Ovate::
systems. Sanitary and air conditioning wastes are not included.
Pi. 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.

I
I /
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 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:
I1) . 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
1 effluent discharge below al.l treatment processes.
1 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 mer_ourements 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
i :.
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
l 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
i effluent from the treatment plant. The discharge shall be evaluated as follows:
' I 1) A pollutant analysis of the effluent must be completed annually using
j EPA approved methods for :he 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) "onitoring 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 cf 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 wacers of the United States is prohibited
unless specifically authorized elsewhere in this permit. Discharge of chlorine
from the use of chlorine gas, sodium hypochiorite, or other similar
iliir
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. 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.
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
I ; (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 discharge,i
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 d.iffer.enr:es in effluent quality realized between the twc f
imethods.
It has been demonstrated that the presence of ions of copper, iron, nickel, an-i
zinc in the ash pond waters was not measurably increased during the ash pond
equivalency demonstration at the Duke Power Company's Riverhend Steam Station.
Therefore, when the following ,conditions are implemented during metal cleaning
j 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 prior to metal cleaning waste addition.
4. Four days retention time in ash pond with effluent flow virtually
stopped.
5. Boiler volume less than 86,00') gallons.
6. Chemicals for cleaning to include only one or more of the following:
a. Copper removal step - sodium bromate, NaBrO; ammonium carbonate,
(NH)C0; and ammonium hydroxide, NHOH.
b. Iron removal step - hydrochloric acid, HC1; 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-close the basin discharge,
conduct such in-basin sampling as necessary to determine the cause of
nonconformance, will take appropriate corrective actions, and will
file a report with EPA includ:ng all pertinent data.
W. The permittee shall report all visible discharges of floating materials, such
as, an oil sheen to the Director when submitting DMR's.
X. The permittee shall check the diked areas for leaks by a visible inspection and
shall report any seepage detected.
lir_ •
iI
.) I

• •r
PART IV
ANNUAL ADMINISTERING AND COMPLIANCE FEE REQUIREMENTS
A. The permittee must pay the annual administering and compliance fee within 30
(thirty) days after being billed by the Division. Failure to pay the fee in a
timely manner in accordance with 15 NCAC 2H .0105(b)(4) may cause this Division
to initiate action to revoke the permit.

;00State of North Carolina 'A
Department of Environment,
Health and Natural Resources • •
Mooresville Regional Office
James B. Hunt, Jr„ Governor Jonathan B. Howes, Secretary
Vivian H. Burke, Regional Manager
DIVISION OF ENVIRONMENTAL MANAGEMENT
July 14, 1994
Mr. John S. Carter
Duke Power Company
Post Office Box 367
Mount Holly, North Carolina 28120
Subject: NPDES Permit No. NC0004961
Riverbend Steam Station
Gaston County, NC
Dear Mr. Carter:
Our records indicate that NPDES Permit No. NC0004961 was
issued on July 11, 1994 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 are Pages 4-5.
Pages 4-5 set 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 forms, 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 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 unit/process failures, etc.
Also addressed are requirements for a certified wastewater
treatment plant operator if you are operating wastewater treatment
919 North Main Street,Mooresville,North Carolina 28115 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50%recycled/ 10%post-consumer paper

Illiiiiiirr
Mr. John S. Carter
Page Two
July 14, 1994
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 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,
•
C kj. k'. ?`J{.�.t-14`4.-)� /3
D. Rex Gleason, P. E.
Water Quality Regional Supervisor
Enclosure
DRG:sl

` ;.\ II Vi + / rtfilN
Duke Power Company q ' NATURA s
Generation Services Department 1r(\L
13339 Halters Ferry Road �)
Huntersville. NC 280 78-7 929 FEB 2 7 1995
DUKE
yI .i j.,• 1 p t ,1T
POWER . III�UI\L�IL� �1 L''wl':b'.L YIi1Jy ni��l/
May 23, 1994
Ms. Collen Sullins
Permits and Engineering Unit
North Carolina Department of Environment,
Health and Natural Resources
P.O. Box 29535
Raleigh, North Carolina 27626-0535
Subject: NPDES Permit Renewal, NC#0004961
Riverbend Steam Station, Gaston County
File: RB-706.15
CERTIFIED: P-384-366-890
Dear Ms. Sullins:
The above referenced permit expires November 30, 1994. GS 143-215.1 (C)
and Part II.B.10 of the subject permit require the submittal of an application for
( renewal at least 180 days prior to expiration.
Please find enclosed in triplicate, the application for renewal of the subject
permit and a check in the amount of $400.00 to cover the renewal processing
fees pursuant to 15 NCAC 2B.0105(b). We request notification that the
application is complete.
Please note that current data is used throughout the NPDES application where
available. In addition, supplemental information is enclosed to reflect
conditions for the station. This information is representative of station
operation for the period of 2/93 - 3/94. Riverbend has recently undergone an
extensive Plant Modernization Program (PMP) that was completed February
1993.
Should you have any questions or desire additional information, please contact
Gerry C. Parker [phone].
Very Truly Yours,
E
cJoh' S. Carter
Technical Systems Manager
GSD/Environmental Division
Pnnred ,ecycied Raper

UNIONFIRST
CORNE DUKE POWER COMPANY
IMPREST PETTY CASH FUND o .v J J
DATE MCGUIRE NUCLEAR STATION 0 3 7 9 3 3
05/23/94 13231 HAGERS FERRY RD. •
-
HUNTERSVILLE,N.C.28078
[phone] 66-021
530
FOUR HUNDRED AND 00/100 DOLLARS 1»****4n*-IOL 60
PAY TO N. C. DEPT . OF ENVIRGN. .HEALTH
& NAT. RESOURCES/DIV. ENV. MGT .
THEORgER OF P. 0. BOX 29535 \
RALEIGH, NC 27626-0535 i li 1. 1.
4-0414/
AUTH RIZEO SI TU
i
11603 ?93311' 1:0 5 3000 2 191: 20 ? S63 ? 2 ? S9690
DUKE POWER COMPANY MCGUIRE 13231 HAGERS FERRY RD. HUNTERSVILLE, N.C. 28078 [phone]
%4 4' a OPACIOPPONGROSS DISCOUNT NET
NPDESPERMITS/16 05/16/94 RVB NPDES PERMIT FEES /400. 00 0 .00 A00 . Ou
FORM NO.20090(R9-91) •
I 11t' •

%/11 . 1 1 11.41.,Ivvv1/4.4. ..iivii,.. . • .. , t_v4V-1/4vuu. r‘pNiuvui c;AH11L;J -..1 a -a`.
, (fill—in areas are spaced for elite type, i. e., 12 characters/inch).
'4FORM .. _", •ti;r-•i: • :r 4"'. - � AIN. , •, ,NCB Q a. V. . - .. ,,.;� ;,�r� I PA I.D•�f4UMBER
- 1 - likalrio
- GENERAL - (Read the"Goeneral'lrutructioru." 'before starting. ) ` , : - - = ` is ��`is��� is
`\\ `\\LA\B\\ LlT\EnS ' -.g. s: -- • '- - .,P* • GENERAL INSTRUCTIONS „�;
I. EPA I . D. UMBER . . *�` : If a Preprint abet' has be8n. proiiided,••effix•
IL . ;�.� ' •�:�-.: ,. it in the designated sp77:6- evi inform,`
•
_ .r R ewthe.`' ' „ • ation carefully; if any -is:incorrect,'.cro•
{ 'AC1LITY AME , -'; :', through itand enterorrectdata In 'ttte-�,� \.• ~r,,.:,. ., f �, �,, . ; :, 1• •, appropriate -fillate s�-eovvyAlso t..s•.. °'-*. ; 4 '":� a_ 1^ . • ,, ' � •',_, 1.•' ; .••rA :. .,' ' .`. :,�• r ^ \.. : . . .. • - frthe •preprinted =datal'Is'* nt thegar a wACILITY. " ' left of the label -`sliac a lnfon»adort
V V. M A I L i N ADDRESS P EASE PL ' LABE ' IN HIS SPAC that should a ,pear), pieaie- provide it In -ttie
proper fell—in areas) below• tf the label , 1:��;
complete and correct, you need not complete ..'
\\. : Items I, III, V, 'end �VI /except VI-B whkh:
must be completed r rdless). Complete ell
FACILITY • • items if no label his . been, provided. Refer to
I ' LOCATION the instructions for - detailed*� Item : descrip-.
tions and for".ttie -legal - authorizations under.
•6„.
� : . kiii.‘\66.
'which this data• is collected: - r ?
•
II. POLLUTANT CHARACTERISTICS
INSTRUCTIONS: Complete A through J to: determine Whether need to submit any permit application forms to the EPA. If you answer "yes"
r° to any .-
��qu 'ons; you .must submit this -form. e �parentfiests .follvwnng, tfie, quest�on. Mark "X"._�o the box-lo•the� Ird column
` , • ,j,. ,•",�r: a ':.,, • !� � � -. ;f• �. III* .t� � II ��1. Z
lementalform.as. attachedJL: o a !4 qoech gu ► opyouneed not submit any of•tfiese.forms. You. mayanswer nifyour activity.• •�w •i'-•• � !�{
it excluded from permitrequirem• entt; eeSectlon C of.the`i uctiont,-,Se alto, Section D :of> ie instructions for definitions of bold—f lid, ,. .,. .....„:„Zo'42. ' ' • .'C'...,-'41 i ' ' 4- : = : • ' .�-teams. ,�•I
t .{, x. `. . AR$ 'X -w' ' .�.`-) ARK •X' w,.s.,
SPECIFICCIUESTIO '
� . �� - � . "�• ':.� !`'�r.� :,: �i9'ORM •.� ", _ .. --.--SPEC1 !"1C CUESTtON3•: -'�;:.-:.;:,"�Mt:�' :Y f NO -- F_ORM=�`�
• .�., ,,:i I' .„. -:.._.._ ,r.r;Te•t `.1,- - ° a ATT=ACNED R ATTACF� tO
1 a
.: .It
.< : ;: •- ,, ., :. ..• . . • . ;: . .•- . ;.°. T y '' N� :. �. exfsthg:ar.,� peed
fi1/4.°Cvits " iss f acjiity ;a• pubitcly.! Aownemi .ea trait `:_r ': : 'o.�r LA`S � ; ,�n. .- �fredi� :n , . +';
ry♦ .J.�� I. a � « • .; - • .. . '� .•',A.�'M�'1i � M iy° ,• ► • .. . '• - .k• ` r
Ch results in a discharge to -waters citMs ,t1Cl ,. _4+„ `~� '''�
{ t _� _ r tiquatica�il . . . n .fascility. whicbrostilts. X
FORM 2A1: h - < .��.
• . •.�6' ' " Mw �, • w'. •' - , ' `+discharge.tO unit i'�� `' U.S.`?• `FORM 2 B)--P "-- 4-•
• 1 i•!'L4', / •
e[y'k,.M . yl. '�. a . -.19 17 .. 1 / c S.. 1! 2 0 21
..-
C.
Is this a facility which currently results:_in iseharges D. is this a ''proposedlacility (other than those described
to :waters•-•_of the U.S.. other than those..��d ' ";015:1:in X X 'fn� 'A ' or l bowe�y ich will wait ••in •a'diseharge-to ''
X
A or B above? (FORM 2C) , � iY) • x'. ° • a '. -M.= ' - r 'iTi . ..� Zf , ' 27 • 1
�� r •w ���,. .,�.. . ,� 4�; _4 .,waterer o`�_cs�fie U�.?, -FOR M:�a ; •�•�� ��-=: ‘ "�••�' ,. ��� '� :�
.. �•y. -".w M•{�.'• _ •1 • 'rY.. • _ ...s ' if.��'`:.•- - v - ••- .•fin /1
E. Does or will this facility treat, sto�e;rar.4/* �'• seeat; . F `Do :yatUat',w111 of ject Ist: hi=- facility-lindtisti'ial r
. : t� • u efflueitf' "" low the =lowermost stratutn.coi*
hazardous wastes? (FORM 3). .. }- = X .munl•clpat ;- . ,- X
,fx; L' �j-;a _ 4taining; ttiii' - onhf quarter �•mile. .of.•rthe, weil +boc_e
:, - ! -•,y- :� 1 -"440dergCifil s➢vurceL f drinki water? ,41J .
- A'.".-r ,'- ' 39 '3 0• _•;. ;.. .rl t -3,r 4 "`:- r-s-_' +s +� ,-.,.11, 1�i• =3= 33
:. • " .. �. • ,ti p..L•F_ ..� - �fif.,-`ja '.. - . ate 4.:A .�r,.i•.L. Z,Y v`: .. ,
G. Do -you or will you inject at this- facility ac�y�p-,rgduced.; � � � ;►�•� '-�t -••��.
•� • : N. p you-or-wut ,o eject at.this facility fluid�c'for. $pe- ..
water or other fluids which are brought to't., a sul:face X x� °t X
'n connection with conventional oil or•,natura saspro1, t.
cial prr�cesses.;,su. ' mining.of sulfur by the: Frasch=
( r.. . L. �'a, process sotutior Ifling -of-minerals,'1n alas combos""
auction infect fluids used . for enhanced re del l- . -, '. y x� '�•j� s•..<.
oil of natural gas, or-inject -fluids ,for' stbea9e tiq tl ,4:. ..•,.-• `:9,4 ��*• r •, • . . 1 . ; 4' . X.� 4.
hydrocarbons? ( FORM 4) .- . „ •. 34 35 34 • S� 37 3. 311
I . is tthis facility a proposed:"stationary;'source:rNthic js,- J.oils:•this .lecility a -:proposed-stationary- source whIch e*
e 8 industriall ategories listed1,1i he fi - • "'NO
= one of ',the 2 •
z " T� one`;�►f .they 2$Yindustrial:categories listed •in ftf�s��•
• 'structions and which will potentially .,emit400 , tons' X anstructio ;fend: which will potentially .emit. 50 .tons X
per year of any air pollutant regulated under the per year of any air pollutant;.'egulated.under the Clean,
Clean. Air Act and may affect or be located in an Air Act and may.affect or be located in an attainment• -
attainment area? (FORM 5). ' . .,t: :1..„ ;,-r: .r w.;:o t•. : � 4: area?. (FORM.-5)-�: x: . �.;:: . •... .. .• . . t"
III, NAME OF FACILITY '
c . 1.
R I V E R B E N D S T E A M STATION I O N i.
1 SKIP 4
15 16 - 2* 30 69
IV. FACILITY CONTACT
A . NAME & TITLE (last, first, & title) B. PHONE (area code & no. )
c 1 1 1 1 1 1 T 1 1 1 1 1 i i i i 1 1 1" i i 1 T 1 1 T 1 1 1 II - II i 1 i
111
C A R T E R J S T E C H N I C A L SYS MGR 7 0 4 8 7 5 5 9 5 4
4 - I
45 45 — 4! 49 - 51 52 - 5S •
V. FACILITY MAILING ADDRESS
A . STREET OR P.O. BOX
c MIT TIIII TT T 1 T TITTIITIIIIIII
3 1 9 HAG E R S FERRY ROAD M G 0 3 A 5 •
I 14 - 45
,
B. CITY OR TOWN C. STATE D. ZiP CODE
c T I I I I I 1 T T T 1 T T T T I I I I I T T T T - i 1 1 1 1
4 HUNTERSV ILLE N C 2 8 0 7 8
1 ! 14 - 44 41 42 47 51
VI. FACILITY LOCATION -
A. STREET. ROUTE NO. OR OTHER SPECIFIC IDENTIFIER : •
c ITT TIIIIII ' Till T T 1 T T T T l T T 1 TIT `
1111POBOX 3 6 7
Is 1 . - 4II
B. COUNTY NAME
1 T 1 T 1 11 1 1 i 1 1 1 1 1 1 I T i T T T 1
f• . AS TON
44 • 70
C. CITY OR TOWN D. STATE E. ZIP CODE F. COUNTY SOD
c TIIIIIIII I T T 1 T T T I T I T T T T T T I TIT 11f knownZ I
6 M O U N T HOLLY NC 2 8 1 2 0
- 4 I - I I I I I 1 I I
11 16 - 10 . _ 41 U _ _ 47 - 21 1 _ 72 - 54 _
EPA Form 3510-1 (8-90) CONTINUE ON REVERSE

. • NTINUED FROM THE FRONT
V'1I. SIC C 1,OO, 4-dljlt,'/n"order of priority) .
A. FIRST ; ,4•� - . . •
O. SECOND : • . , �+ .':/
_ 1 1 I 4.(specify) _ 1 T I - (specify) ,
7 , 4 ` 9 , 1 ' 1 , Electric Services
,.� 1 1 1
It 14 - 1S 14 14 - 1!
C. THiRD D. FOURTH
1.
,�.T I i 1 (specify) i i 1 (specify)
1 7
111 - 1 . 1S 14 = l If
VIII. OPERATOR INFORMATION
A. NAME 8. IS the name listed In
c ; II III l I i III III 1 1 1 1 T 1 1 1 1 1 T 1 1 1 i 1 1 i 1 1 1 i I 1 I" — Item V I I I-A a I so the
g D U K E POW E R C O M PAN Y owner?
1 IA 1 1 . 1 1 1 1 1 . 1 1 t 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 L 1 1 1 1 1 1 . Et YES 1 NOx
11 14 - 11 66
C. STATUS OF OPERATOR Enter the a i
( ppropriate letter Into the answer box, if Other , spectjy.) o. PHONE (area code � no.) :
E = FEDERAL M =.PUBLIC (other than federal or state) (specify) c 1 1 i l 1 1 1 -
S = STATE O = OTHER (specif))) P A 7 0 4 8 7 5 5 9 5 4
P = PRIVATE •
N 11 1 - IS If - 21 22 - 21
!,'STREET OR P
�.,1 T 1 1 1 1 1 1 T i i 1 1 1 1 T T T i i T 1 1 1 i 1 1 i 1 i�
4 2 2 SOUTH CHURCH STREET
2s „ • 111
. F. CiTY OR TOWN •=` . . a G.STATE H. ZIP CODE IX. INDIAN LAMM...1M
c C T H 1 Al R 1 L 1 O1 Ti T 1 E 1 1 1 i 1 1 1 1 1 1 1 1 1 I 1 N 1 C 2 1 8 1 2 r 4 12 located on is the facility lted Indian lands?
g • •
MII.___yE S X N O ;�►I
1 1 1 1 1 t 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 l 1 1 1 1 1 11 . 52
'I II _ . , ,0.;;,;. dp,.• .:r • •. .., .. .. .. ` u •. . 0 ' 4/ 02 47 f 1
X. EXISTING ENVIRONMENTAL' PERM! -
A. N P D E S (Discharges to Surface Water : $ .a .b• (Air Emissions from Proposed Sources)
c T 1 1 1 1 1 1 1 IIIIII e; Ay: :. I I i I I 1 I I I I I
_ __ t
9 N N C 0 0 0 4 9 6 1
3 R, t l 1 1 1 1 1 1 1 L 1 1 J !�"• 1 1 1 1 1 1 1 1 1 1 1 1 •
CIS 14 17 it . . ..... • 30 . • IS 14 •17,, IS LA.- - 30 1aty •
a. u lc (Underground Infection_of.Fluids) , •. '.,1 i• • '!., ' r . .,d :- •E.OTHER (specify) •C T 1 1 1 1 1 1 r i i Till c t T . . 1 1 T 1 1 1 1 1 1 1 1 1 (spc��)A r11
g � 3 7 8 8 R 1 4 Quality Boiler 4 , 5 ,
9 U . . . 1 . 1 1 1 1 1 1
16 1f 17 it i _ . 30 111 II- 17_ IS , - 20 o 7 and CT S
. : - �.. 4. (specify)
C. R C R A (Hazardous Wastes) . ;., . .-- :".:-.'1*-
�. , -, - • .. , :,�,�E. OT H E R
c T i II i II i II 1 I I I c. lx::`.t . I 1 1 1 1 1 1 1 i 1 1 I (specify)
1
iV•A ,ti�
I I I L J I I 1 I A l 1 1 i 1 I 1 I 1 1 l 1 1 1 1
17 IS
- 3O o .tI'S •1$ .17 �•11 - 30
XI. MAP
Attach to this application a topograpf?Ic 'rnap_ofibe'.area extending .toitleast one mile beyond property boundaries. The map must show
the outline of the facility, 'the. locatlon tf .each of-its:,existing and proposed intake and•discharge structures, each of its hazardous waste
treatment, storage, or disposal facilltle0milteachwell- where it Injects fluids underground: Include all springs, rivers and other surface
water bodies in the map area. See instructions for precise requirements.
XII. NATURE OF BUSINES$_(provideabrief:descripU'on
Coal fired steam electric generation
XIII. CERTIFICATION (see Instructions)
I certify under penalty of law that /.hat a personally examined and am familiar with the informatiorksubmitted in this application and all
attachments and that, based on m in uI - of thosepp
Y � 4' rY persons immediately responsible for obtaining the Information contained in the
application, I believe that the information is true, accurate and complete. i am aware that there are significant penalties for submitting
false information, including the possibility of fine and imprisonment.
A: NAME & OFFICIAL TITLE (type or print' ' B. SIGNATURE ' C. DATE SIGNED
M . D . McIntosh , Vice President _
issi 1 H dro Generation Department i- 7, .. �' 5L
COMMENTS FOR OFFICIAL USE ONLY .
c 1 T i 1 1 III '
C
13 14
EPA Form 3510-1 (8-90)

Pease print or type in the unshaded areas only. I NC0004961 App -oval expires 5-31 -92
FORM ' ` i ' '�i,� +I`1S�►��� `� .�,.'? �. ' U .S. EN V IRONMENTALPR.TECT•ION. AGENCY
'�i!'• •: , •-, © '.� ". :; � � : •. APPLICATION FOR PERMIT-TO DISCHARGE-WASTEWATER
t WASTEWATER w ;�... .
• �r � •''Y�=-" ^.t~�c' EXIST! NG MANUFACTURING, COMMERCIAL, MINING AND SILVICULTURAL OP
PD E S ,�.ti�:k�1�u;C'� [ t .:�. : ,; •• Consolidated Permits Program
. OUTFALLIL:OCATION
For each outfall ylts ,the latitudeand,longitude of its location to the nearest 15 seconds and the name of the receiving water.
• B . LATITUDE C . LONGITUDE
IBER ' - - D. RECEIVING WATER (name)
rt1 1 . olta. a. .A/N. I. sec. 1 . DEG . Z. PAIN. 3. SEC.
001 35 21 28 80 58 29 Mountain Island Lake ( Catawba River )
002 35 21 28 80 58 29 Mountain Island Lake ( Catawba River )
•
•
I II. 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 (e.g., for certain mining activities), provide a
pictorial descri •. tion �of the ttatut�e end amount of anysources of water and anycollection or treatment measures. •
.
ELi.,For, each outfall; ipt'{o idt?;�4_? description of: ( 1 ) All operations contributing wastewater..to .the effluent, includingrocess tewater • r ..
• • P �C . , sanitary wastewater
;•cooling �.icvater, endlitorm•:watei runoff; (2) The average flow contributed by each operation; and (3) The treatment received by the wastewater. Continue' .
on additional sheetS'if3necessary'.
LOUT -` 2. -Ot'ERATION (S ) CONTRIBUTING FLOW 3. TREATMENT ••. ^ , �,�:.
RA L L N Off•�.,,, •. , •� • - - ; - • � �
b. AVERAGE FLOW b. , L.IST. CODES FROM
(ilst) � `' a: OPERATION (list) (include units) a. DESCRIPTION TABLE 2C- 1
•Y A•
001 Condenser Cooling 329MGD ► creening IT
Water ( once through non - Discharge to surface water 4A
contact) . Includes intake
screen backwash .
ti
Ash Basin Discharge 4 . 8MGD hemical Coagulation 2D
002 . ettl i ng , neutralization 1U 2K
Ion Exchange 2J
Discharge to surface water 4A
•
•
•
OFFICIAL USE ONLY (effluent guidelines subcategories)
rep • .- _ . .- .. __ - . . -.. ,_ rsf1+.17- 1A + 1C= A • V � .

, EPA1.I.D. NUMBER (copy from Item 1 of Form 1 )
< NC0004961
CONTINUED FROM PAGE 2 _
I . INTAKE ;AND EFFJ. UENT CHARACTERISTICS
• , B, & C: See instrd'&ions before proceeding — Complete one set of tables for each outfall Annotate the outfall number in the space provided.
NOTE:`;., ' bles V-A, V-B, and V-C are included on separate sheets numbered V-1 through V-9. ►
• t
D. Use the space.-.belpw' 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 maybe
iischarged from `any outfall . For every pollutant you list, briefly describe the reasons you believe it to be present and report any analytical data in your,
dossession.
1 . POLLUTANT 2. SOURCE 1 . POLLUTANT 2. SOURCE
Asbestos Clean - up of containment
areas from asbestos strip -
ping / handling operations .
Trace amounts may be dis -
charged to the ash basin .
•
•
VI. POTENTIAL DISCHARGES NOT COVERED BY ANALYSIS
Is any pollutant listed in Item V-C a substance or a component of a substance which you currently use or manufacture as an intermediate or final product or �• N
byproduct?-;:
YES (list all such pollutants below) [x _ NO (go to Item VI-B) •
C
EPA Form 3510- 2C ( 8 - 90 ) PAGE 3 OF 4 CONTINUE ON REVERSE

G'ONTINULD, FROM THE FRONT
VI I. BIOLOGICAL TOXICITY TESTING DATA ` =`
Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made on any of your discharges or on a
receiving water in relation to your discharge within the last 3 years?
[x YES (identify the test (s) and describe their purposes below) NO (go to Section VIII)
Quarterly analysis of Ceri odaphni a Dubia acute LC50 per current permit requirements on
Outfall 002
•
•
VIIICONTRACT 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 C. 'TELEPHONE D. POLLUTANTS ANALYZED
B. ADDRESS (area code & no. ) (list)
Heritage Laboratories 4132 Pompano Road ( 704 ) 393 - 1853 Total Radium
Inc . ( Certificate # 98 ) Charlotte , N . C . 28216 Radium 226
Phenols
Sulfide
Sulfite
Bromide
Color
Cyanide
MBAS
Fluoride
IX. CERTIFICATION •
l certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete.
l am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.
NAME & OFFICIAL TITLE (type or print) B . PHONE NO . (area code & no. )
M . D . McIntosh , Vice President Fossil / Hydro Gen . Dept . 704 - 382 - 5941
C. SIGNATURE D. DATE SIGN D
r
FPA Fr rm 'ici11 _ 7r` to_oni PAGE 4 OF 4

1 SUALk,-1.:,L4 UUV ---', -
1 2 1 MILE
1000 0 1000 2000 3000 4000 5000 6000 7000 FEET
J
1 .5 0 1 KILOMETER
(—i H H - . F-1 I 1
CONTOUR INTERVAL 10 FEET
81 i 00' ,501aea*{. 502 503 57'30" 504
* I
1 )1 \ - • ! .\ 4,, ,.,,
MN lG1,1
N I l.a • 1 t� •\• i_1 i t f ,p,,/ /r I tib02
53 MILS 0.02' 16 r:�� 1,` I +,1 'It r, 'I \ �,i / S __� /r �' J
1 MIL f 'It • 0 I. `� \ ,,,1 \ •1 } 4 \\h -�
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743. w r • •4 '.\' r--" • jam• A`11_. ,_r`� Fkt / ., V
- -• `' II
, 1 1. •• 1, 1 './ .1- r�
•") c,, v �1912 /6
oC", ," . r Powerplant �� ,- o
1 �l 1 l 1 R.,,, ubyt,� i et r Ta)* �l J�; \�. �� J.
•
• 1
• ..I I ..j.f(.\. c
. , SL?/\.'`.,s\.\,
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/ ,Rl•,.ieetbeed /cool/ 1 ��;. / •I • .
'I
r7 7,,
— ��/�efi 1 hem.
39 1.
1 Rozzelle N. V A Ni) — — —
' .'' . I. tp ''' '' L'Ir\5 (../\::•• .. ' " . '' ;
/S 1 49.1 ( G 1,11 .. \_/
FIGURE 1 USGS TOPOGRAPHIC MAP OF THE AREA
AROUND RIVERBEND STEAM STATION

. , #41/ 111I 4,.......-. ,
..., ....__,
, ii,
e ._ , ,____ _____),
►���� ' ��
ASH BASIN • �; II, ,.. 002 E---7 f
+ `
►♦♦♦. 1 - SECONDARY CELL �\\ ` /� �`
\���
II r \ \\
♦�♦ \ — i ��
.♦♦, ti'' ASH BASIN \\\ ' �I _
PRIMARY CELL ��� (V �1 .
ki
.. \ ii I
12
4 \,; \ _;� '\
i 4 \ \ : ,--
\� 7, /i \��/ •
\ l( / „/.7
i,* 1 .4k. \ \ \\.. , ( • .
/
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�> �,, ,/,
'T ♦ = 1
. (,. j
• P. 4 117 --- \ /I f )1k.
11\
1����♦I 4 /// 's '.\\ .////
fir
♦ � // - ii
♦♦♦ �
♦♦.• . COAL PILE I '; // ` 500 0 500
.♦< \ ii 1 f WA EHOUSE
♦,/``1 f \ SCALE IN FEET
SEWAGE _
TREATMENT I C—� i! LEGENO
PLANT �,,�` ' 001
PLANT DRAINAGE
,.' . POWERHOUSE DISCHARGE AGINTs
COMB.R jam`�J
TURBINES /w`
pID SWITCHYARD 11 OISCHARGE CANAL J DISCHARGE POINTS
FUEL Ir0 I h
STORAGE 1 I DISCHARGE NO. SOURCE
OIL 10,..-.—... I' 00t C.C.A. DISCHARGE ?ANAL
TANK 002 ASP BASIN DISCHARGE
\ SUBSTATIOIII Jl
I
/ D U K E POWER COMPANY
c
J RIVERBEND STEAM STATION
` ' J
I , \�� NPDES DISCHARGE POINTS

NPDES •
Supplemental Information
for
Riverbend Steam Station

LINE DRAWING OF WATER FLOW THROUGH RIVERBEND STEAM STATION NC10004961...emit Appi. ,.
May 23 1994 .
COUNTY: GASTON STATE: NC Page 2 of 18
INTAKE TUNNEL FROM CATAWBA RIVER
INDUCED DRAFT FAN COOLING 0.15 MCD STORM WATER FROM ROOF DRAINS
335 MGD WATER AND PAVING
INTAKE SCREEN BACKWASH ► •
0.01 MGD
0.15 MGD - -
PREHEATER BEARING COOLING
WATER
INDUCED FAN&PREHEATER 0.03 MCD GROUNDWATER REMEDIATION
BEARING COOLING WATER OIL/WATER SEPARATOR
DRINKING WATER SYSTEM I0.023 MGD
(GROUND WATER) STORM WATER FROM COAL PILE
PLANT CHILLER SYSTEMH 0.05 MGD TRACK HOPPER SUMP
(GROUNDWATER)
GENERAL PLANT/TRAILER SANITARY
01
WASTEWATER
TURBINE LURE OIL COOLERS 1 N ASH REMOVAL SYSTEM
NLABORATORY DRAINS V lir IF V
3 MGD
Hilli h
1.4 MGD
CONDENSATE COOLERS YARD DRAIN SUMP
CHEMICAL MAKEUP TANKS ANDpi
A
DRUMS RINSATE
EXHAUST STEAM CONDENSERS v
SANITARY SYSTEM
0.006 MGD
INTAKE TUNNEL UNWATERING SUMP '
I MGD
TURBINE ROOM SUMPS
FILTERED WATER AND ASH ,
REMOVAL SYSTEM BOILER ROOM SUMPS111111
ASH BASIN
-
1.3 MGD
A
Ilr
^ DEMINERALIZER SYSTEM STORM WATER FROM POND AREAS EVAPORATION
I I AND UPGRADIENT WATERSHED 031 MGD AND SEEPAGE
1 MGD
FILTERED WATER SYSTEM
0.004 MGD
0.004 MGD
GRAVITY FILTER BACKWASH AND
IIPP CLARIFIER SLUDGE Illi° OLD END PIT SUMP
002 (5 MGD)
001
MOUNTAIN ISLAND LAKE
(3 9 MGD)
Flows are approximated averages which have wide variability on a daily basis. Suovlemental Information

NC #0004961 Permit Renewal Application
C May 23, 1994
Page 1 of 18
General Information
Riverbend Steam Station (RSS) is a coal-fired electric generating plant
operated by Duke Power Company. RSS is located on NC 16 at Mountain
Island Lake, six miles northeast of Mount Holly, North Carolina. The station
derives its name from the fact that it was built at a bend in the Catawba
River.
Riverbend's first three generating units, constructed before World War II,
were retired in the late 1970s. Units 4 and 5, each capable of generating
94,000 kilowatts of electricity, began operation in 1952. Units 6 and 7,
rated at 133,000 kilowatts apiece, started service in 1954.
In addition to the coal-fired units, four combustion turbines supply 30,000
kilowatts each for use during periods of extremely high or peak demand for
electricity. Combustion turbines operate a little differently from steam
plants. They burn oil or natural gas to heat compressed air, which expands
and drives a turbine-generator to produce electricity. The Riverbend
combustion turbine units were installed in 1969.
Duke Power created Mountain Island Lake in 1923 with the construction of a
dam across the Catawba River to provide water power for the Mountain
Island Hydroelectric Station. Riverbend was constructed on this lake since
steam electric generating facilities require large quantities of cooling water.
A line drawing showing the water flow through RSS is on the next page. It
indicates sources of intake water, operations contributing to the effluent, and
treatment provided. The approximated flows on the line drawing are
representative of station operation for the period of 2/93 - 3/94. RSS has
recently undergone an extensive Plant Modernization Program (PMP) that
was completed February 1993. Following the line drawing is a brief
narrative description of sources contributing to each outfall effluent.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 3 of 18
Outfall 001 - Once Through Non-Contact Cooling Water
Raw water from the Catawba River is passed through condensers and
auxiliary equipment on a "once-through" basis to cool equipment and
condense exhaust steam from the turbines. When RSS is operating at full
power, it is has a design capacity to pump 622.1 MGD of cooling water
through a network of tubes that runs through the condenser and selected
heat exchangers (e.g. turbine lube oil cooler, condensate cooler, plant chiller
system). This raw water in the condenser tubes absorbs heat from a closed
system of highly purified exhaust steam from the turbines and converts it
back to water. Condensed exhaust steam is then returned to the boilers and
is recycled a number of times. The cooling water is returned to the lake. No
chemicals are added and only heat rejected from the condensers and auxiliary
equipment is absorbed by the cooling water, hence the term "once through,
non-contact cooling water" is applied.
The condensers at RSS are cleaned mechanically. Periodically, metal or
plastic scrapers are forced through the tubes to rid them of scale or other
deposits.
Each unit at RSS has two condenser cooling water (CCW) pumps. The
capacities of these pumps are listed below. Normal plant operation of the
CCW pumps is based on intake and discharge temperatures and unit load.
Further, the units are typically operated on different computer highways or
WDPF control systems to avoid a system trip that would suddenly reduce the
discharge flow at 001 . This practice leads to a higher reliability factor for
the units and protection of aquatic life taking refuge in the discharge canal
during cold weather.
c
Supplemental Information

NC #0004961 Permit Renewal Application
t May 23, 1994
Page 4 of 18
Condenser Cooling Water Pump Capacities
Table 1
Unit No. _ 1-Pump GPM 2-Pump GPM o
1 36,000 72,000
2 36,000 72,000
•
4 33,500 67,000
5 33,500 67,000
•
6 38,500 77;000
7 38,500 77,000
Design Rated Cooling Water Capacity 432,000 GPM (622.1 MGD)
A. Filter Backwash from Raw Water Intake Screening Device
(Permitted pursuant to G.S. 143-215.1(c) and Part III section I of
current permit.)
Raw water intake screens at RSS are backwashed on an as needed
basis. Normally, the screens require backwashing once per twelve
hour shift for a period of approximately 20 minutes. The water
required for backwashing is supplied by a low pressure service pump
with a design capacity of 800 gpm. Therefore, the average flow of
water used to backwash the screens is 0.032 MGD. Should it become
necessary to backwash the screens on a continuous basis the
maximum flow would be 1 .15 MGD. This intake screen backwash is
discharged into the condenser cooling water line downstream of the
condensers. The debris collected on the screens consists mainly of
twigs, leaves, and other material indigenous to the Catawba River
system.
B. Intake Tunnel Unwatering Sump
In the event that maintenance activities are needed in the intake
tunnels an unwatering sump is provided to remove water from the
tunnel(s). To date this operation has not been done, but it is available
Supplemental Information

r
•
NC #0004961 Permit Renewal Application
May 23, 1994
Page 5 of 18
should the need arise. Raw water in the tunnels can be removed by a
sump pump to the discharge side of the condensers which would then
exit at outfall 001 .
C. Turbine Non-Destructive Testing
Bore sonic testing of turbine rotors is infrequent, once every 5 years.
A maximum of 400 gallons of demineralized water mixed with 4
gallons of a corrosion inhibitor, e.g. Calgon CS, is used during the •
testing per unit. The mixture is drained and mixed with once through
cooling water downstream of the condensers which discharges at
outfall 001 .
//. Outfall 002 - Ash Basin Treated Effluent
The ash basin at RSS accommodates flows from the yard drain sump, boiler
room sump, ash removal system and non-point source storm water. Total
average influent from these sources combined is approximately 6 MGD. At
times, due to unit loads, rainfall, evaporation and seepage of ash basin
ponds, the amount of effluent may be quite different than influent volumes.
A. Yard Drain Sump
The yard drain sump is a large concrete structure that has four level
controlled pumps that direct waste water from RSS to the ash basin.
These pumps are operated on a rotating basis. Usually two pumps are
set so that one pump is primary and the other is backup. After a
preselected period the controls are changed so that different pumps
are utilized.
The yard drain sump collects waste water from many sources, such
as, the filtered water system, sanitary system, ground water
remediation system, and turbine room sumps. It collects once through
non-contact cooling water from the induced draft (ID) fan motors and
the preheater bearings located in the stacks. The yard drain sump also
collects storm water runoff from the coal pile, rail access, powerhouse
Supplemental Information

I
NC #0004961 Permit Renewal Application
C May 23, 1994
Page 6 of 18
roof and paving. Ground water from a foundation drainage system
under the track hopper is also intermittently discharged to the yard
drain sump. The combined average flow from all sources tied to the
yard drain sump is approximately 1 .4 MGD.
•
1. Filtered Water System - Old End Pit Sump
The filtered water treatment system at RSS consists of a
clarifier, five gravity filters, two activated carbon filters, and one •
set of demineralizers. Waste water and filter media from the
filtered water system (except demineralizer waste water which
goes to the boiler room sump) is drained to what RSS
commonly refers to as the "Old End Pit Sump". From the pit
sump the waste water is pumped to the yard drain sump.
a. Clarifier
The clarifier utilizes typical water treatment chemicals
such as, aluminum sulfate, Nalco 8105 cationic
polyelectrolyte, sodium hydroxide, Calgon-25 clay and
chlorine for the primary treatment of raw water. 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 (alum) and sodium hydroxide.
Approximately, 150 gallons per year of Nalco 8105
polyelectrolyte may be used to replace the use of
aluminum sulfate. The quantity of alum used per year is
approximately 6,000 lbs. The total amount of caustic is
roughly half the amount of alum. The average volume of
water required for desludging the clarifier is approximately
0.002 MGD. These sedimentation wastes along with
dilute water treatment chemicals and by-products are
piped to a floor drain which flows to the old end pit sump
where they are pumped to the ash basin via the yard
drain sump.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 7 of 18
b. Gravity Filters
There are five gravity filters composed of anthracite (coal)
which follow the clarifier in the water treatment process.
Normally, one of these filters is backwashed each day.
Approximately 0.002 MGD of backwash water is required
for each filter. This waste water flows through floor
drains to the old end pit sump which pumps to the yard
drain sump. The anthracite filter is changed on an as •
needed basis with the spent filter media being sluiced to
the ash basin via the yard drain sump.
c. Activated Carbon Filters
The filtered water system includes two activated carbon
filters. These filters are typically backwashed once a
month. The flow of water required to backwash one of
these filters is four hours (4) at 100-120 gallons per
minute. The backwash flows to the #6 and #7 turbine
room sump and is pumped to the yard drain sump.
Approximately 80 ft3 of activated carbon is replaced
yearly with the spent carbon sluiced to the yard drain
sump.
2. Sanitary System
The sanitary wastes from the plant are treated by a series of
three 4,000 gallon septic tanks in parallel and a 1 ,200 gallon
holding tank. Sanitary effluent is pumped from the discharge
chamber of the septic tanks to the ash basin via the yard drain
sump for final treatment. The sanitary waste system is
designed for 12,500 gallons per day. This design was based on
a maximum of 300 and an average of 150 people at the site)
Based on annual data the average daily flow to the yard drain
1Permit to operate implicit in the submittal of the Engineer's Certification performed by Mr. David
Grogg, PE 14075, Duke Power Company (DPC) to North Carolina Department of Environment,
Health and Natural Resources (NCDEHNR) dated 11/19/92.
Supplemental Information

NC #0004961 Permit Renewal Application
( May 23, 1994
Page 8 of 18
sump has been approximately 0.006 MGD.
The sanitary system accommodates waste water flow from
following sources:
a. General plant sanitary waste water
b. Chemical makeup tanks and drum rinsate
(Intermittent rinse water containing small amounts of
aluminum sulfate, sodium hydroxide, hydrazine,
ammonium hydroxide)
c. Laboratory drains
(Small amounts of laboratory chemicals used to test
waste water effluents and high purity boiler water, see
table 3.)
d. GSD trailer sanitary waste water
4. Turbine Room Sumps
The turbine room sumps collect approximately 1 MGD of waste
water via a network of floor drains from intermittent sources
listed below.
a. Ground Water Remediation System
This system was installed in 19922. Ground water is
pumped through an oil water separator and then to the
turbine room sump. Trace amounts of volatile organic
compounds may be in this waste water, such as
naphthalene, chrysene, MTBE, and bis(2-
ethylhexyl)phthalate3. The average daily flow from this
system is (2 gpm) approximately 0.003 MGD. A revised
ground water corrective action plan has been submitted
to NCDEHNR that specifies a system capable of 20 gpm.
2Permit to operate based on letter to Mr. Mike Parker (NCDEHNR) from Mr. Phil Hammond (DPC)
dated 1/3/91.
3Reference semiannual monitoring report to Mr. Chris DeRoller (NCDEHNR) from Mr. Norwood Davis
(DPC) dated 3/23/94.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 9 of 18
Therefore, when the corrective action plan is approved
the ground water remediation system will be capable of
0.03 MGD.
b. Condensate from the feed water system (seal water,
valve and pump leakage, cooling water, vents)
c. Equipment cooling water, i.e. air compressors
d. Floor wash water containing janitorial products
e. Boiler room sump overflow •
f. Emergency fire fighting water
g. Chiller condensates
5. Storm Water
The yard drain collects storm water runoff from the coal pile,
rail access, powerhouse roofs and paving around the
powerhouse and pumps it to the ash basin. A total of 21 .8
acres drain to the yard sump with an average daily runoff
estimated at 0.04 MGD. The average daily runoff is calculated
based on an annual rainfall of 47 inches with 1 .0 and 0.5 run-
off coefficients applied appropriately. Trace amounts of oil and
grease may be present in the first flush of storm water.
a. Coal Pile Run-off
The coal pile at RSS covers an area of approximately 13
acres with an estimated storm water run-off of 0.023
MGD. The coal pile runoff drains by gravity to the yard
drain sump and is then pumped to the ash basin.
b. Rail Access Run-off
The rail access area where significant coal handling
activities occur is approximately 2.5 acres. An estimate
of storm water run-off from this area is 0.004 MGD.
Storm water drains by gravity from this area to the yard
drain sump.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 10 of 18
c. Powerhouse Roof, Paving and Hard-packed Gravel Areas
The roof of the powerhouse, paving and hard-packed
gravel areas around the powerhouse collect storm water
that is drained to the yard drain sump. Trace amounts of
oil and grease may be present in the first flush of storm
water. With an area of approximately 6.3 acres an
estimate of storm water run-off is 0.01 MGD. •
6. ID Fan and Preheater Bearing Cooling Water
Once through non-contact cooling water is supplied to the ID
Fan motor and preheater bearings to remove excess heat. The
rate of flow through these two pieces of equipment which
discharges to the yard drain sump is approximately 0.03 MGD.
7. Track Hopper Sump
The track hopper sump collects ground water from an
foundation drain system underneath the track hopper. The flow
is usually intermittent, however the pump capacity is 100 gpm
MGD. On a daily basis it is estimated that the run time is only
50% which would correspond to a flow of 0.05 MGD.
B. Boiler Room Sumps
The average flow pumped from the boiler room sumps directly to the
ash basin is approximately 1 .3 MGD. The sources of input to the
boiler room sumps includes the following:
1. Waste water from demineralizer regeneration
Demineralizers at RSS consists of two mixed-bed cells which
supply make-up water to the boilers and other closed systems.
Normal plant operation requires that only one cell of the
demineralizer operates at any one time. Each cell has a capacity
Supplemental Information

.
NC #0004961 Permit Renewal Application
May 23, 1994
Page 11 of 18
of 120 gpm.
Each cell is regenerated approximately every other day. Each
year RSS will use an estimated 43,000 lbs of 100% caustic and
40,000 lbs 93% sulfuric acid for demineralizer•regenerations.
Brine treatment of the demineralizers is done twice a year and
with a total use of 9,000 lbs of salt (NaCI). An average dilute
waste chemical and rinse flow is approximately 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 via
the yard drain sump. The useful life of the resin varies and
when deemed replacement is needed the spent resin is sluiced
to the ash basin.
2. Coal pulverizing mill cooling water (trace oil and grease)
3. Closed system drainage, cleanings, testing containing:
Corrosion inhibitors, e.g. Calgon CS and MCS plus24
Biocides, e.g. Calgon H-300 and H-5105, Bulab 60026
Cleanings? (e.g. small heat exchangers)
Dispersant, e.g. polyacrylamide
Wetting agent, e.g. sodium lauryl sulfate
Detergent, e.g. tri-sodium phosphate
Leak testing, e.g. disodium fluorescing dye
4. Turbine room sump overflow.
5. Boiler seal water (trace oil and grease).
6. Miscellaneous system leakage's (small leaks from pump
packings and seals, valve seals, pipe connections).
7. Moisture separators on air compressor precipitators.
8. Floor wash water containing janitorial cleaners.
4Molybdate based corrosion inhibitors are planned for future use.
5Approval for Biocides Calgon H-300 and H-510 was given by letter to Ms. Dayna Russell (DPC)
from Mr. Preston Howard (NCDEHNR) dated 8/19/93.
6Bulab 6002 approved for use at Cliffside Steam Station by letter to Mr. Ron Lewis (DPC) from Mr.
Preston Howard (NCDEHNR) dated 11/12/92.
7To date small closed system cleanings (e.g. heat exchangers) have not used these chemicals,
reserved for future use.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 12 of 18
9. Emergency fire fighting water.
10. Ash removal system overflow.
11. Boiler blowdown
Primarily at unit startup and until water chemistry stabilizes the
blowdown from the boilers at RSS is allowed to flash in a
blowdown tank. After water chemistry has stabilized the
blowdown condensate flow is small. The condensate is drained
to the boiler room sumps. Trace amounts of hydrazine,
ammonia, and silica oxide is may be present in the condensate.
At startup 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 flow from blowdown amounts to an average of
approximately 0.005 MGD. This flow is routed to the boiler
room sump and then to the ash basin. A significant portion of
this blowdown steam is vented to the atmosphere.
12. Chemical Cleaning of Boilers
Boilers #7, #8, #9 and #10 at RSS are chemically cleaned on an
as needed basis (Boilers #1-#6 are retired). Tube inspections
are done during outages which indicate when cleaning needs
scheduling. Boilers #7 and #8 are natural circulation boilers and
#8 and #9 are controlled circulation boilers.
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 total volume of dilute waste
chemicals, including rinses, discharged from #7 or #8 boilers
during a chemical cleaning is 365,000 gallons. The total
volume of dilute waste chemicals drained from #9 or #10
amounts to 275,000 gallons. These wastes are drained to the
boiler room sump which pumps directly to the ash basin.
Immediately prior to the beginning of a boiler cleaning, additional
Supplemental Information

J[•
' I
NC #0004961 Permit Renewal Application
( May 23, 1994
Page 13 of 18
stop logs 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). Chemicals and amounts
required to clean the boilers at RSS follows on the next page:
Supplemental Information

to
' f
•
NC #0004961 Permit Renewal Application
May 23, 1994
Page 14 of 18
Boiler Cleaning Chemicals and Amounts Used Per Unit
Table 2
First Stage
Chemical Boiler #7 or #8 Boiler #9 or #10
Sodium Bromate 550 lbs. 550 lbs.
Ammonium Carbonate 1000 lbs. 1000 lbs.
Ammonium Hydroxide 850 gal. 850 gal.
(26°Be')
Second Stage
Hydrochloric Acid (31 .5%) 3600 gal. 3400 gal.
(20°Be')
Ammonium Bifluoride (0.5%) 1100 lbs. 1050 lbs.
Copper Complexer (0.75%) 1660 lbs. 1630 lbs.
Thiourea or equivalent
Sodium Carbonate 3000 lbs. 3200 lbs.
Citric Acid 300 lbs. 200 lbs.
Alkaline Boilouts (only after major boiler tube work)
Soda Ash 2000 lbs. 2000 lbs.
Triton X-100 Detergent (0.05%) 10 gal. 10 gal.
Antifoam Agent (0.025%) 5 gal. 5 gal.
C. Ash Removal System
RSS utilizes electrostatic precipitators as its air pollution control
devices. The fly ash captured in these precipitators is water-sluiced to
the ash basin. Bottom ash from the boilers is also water-sluiced to the
ash basin. Approximately 3 MGD are required for this purpose.
Electrostatic precipitators at RSS are normally cleaned by mechanically
vibrating the wires and rapping the plates inside the precipitator.
Before major precipitator work is performed they are cleaned by a
wash down. The wash water is pumped to the ash basin.
Supplemental Information

r
•
NC #0004961 Permit Renewal Application
( May 23, 1994
Page 15 of 18
D. Storm Water
Non-point sources of storm water to the ash basin includes a pond
• area of 77.3 acres and an upgradient watershed area of 21 .4 acres.
The estimate for storm water run-off is based on forty-seven (47)
inches of rain per year with a 1 .0 and 0.5 run-off coefficient for the
pond area and upgradient watershed respectively. The average non-
point source storm water input for the ash basin is estimated at 0.31 •
MGD.
Ill. Spill Prevention
A. Oil Storage
Riverbend Steam Station presently has four (4) above ground oil
storage tanks - one (1) 4,250,000 gal. fuel oil tank, one (1) 27,000
gal. light-off fuel oil tank, one (1) 20,000 gal. mineral oil storage tank,
and one (1) 2,000 gal. used oil storage tank.
All above ground tanks at RSS have secondary containment provided
which are capable of containing the entire contents of the tank. An oil
trap tank is located in the drainage area of the 4.25 million gallon oil
tank as an added precaution.
All oil storage facilities are presently covered under Spill Prevention
Control and Countermeasure Plans.
Supplemental Information

w e
NC #0004961 Permit Renewal Application
May 23, 1994
Page 16 of 18
IV. Hazardous Substances
The following is a list of the hazardous substances located on site that are listed in Table
117.3 of 40 CFR 117. These substances are anticipated to be discharged to the ash basin
on a continuous or intermittent basis within the scope of relevant station operation.
Hazardous Substances at Riverbend Steam Station
Table 3 •
POLLUTANT QUANTITY LOCATION • USE
Acetic acid 2 gal. Lab Water Analysis
Aluminum sulfate 3000 Ibs Water Treatment Clarifier
Ammonia 5 lb (gas) Lab pH control
Ammonium hydroxide 100 gal Powerhouse pH control
Ammonium hydroxide 6 gal. Lab pH control/cleaning
Chlorine (gas) 1200 lbs. Water Treatment Disinfectant
Hydrochloric acid 6 gal. Lab Water Analysis
Hydrazine* 200 gal Powerhouse Corrosion Inhibitor
Nitric acid 1 gal. Lab Sample Preservation
p-Dimethylamino 2.2 lbs Lab Water Analysis
benzaldehyde*
Potassium hydroxide 5 lbs. Lab Water Analysis
Potassium permanganate 1 lb Lab Water Analysis
Sodium bisulfite 5 lbs. Lab Water Analysis
Sodium hydroxide 4600 lbs. Powerhouse Demineralizer
Sodium hydroxide 2 lbs. Lab Water Analysis
Sodium hypochlorite (12.5%) 55 gal.. Water Treatment Disinfectant
Sodium phosphate (tribasic) 1000 lbs Powerhouse Cleaning
Sulfuric acid 4000 lbs. Powerhouse Demineralizer
Sulfuric acid 4 gal. Lab Water Analysis
Values represent maximum quantities usually on-site at any given time and do not necessarily
reflect quantities discharged. Various amounts of these substances may go to the ash basin for
treatment due to use in site laboratories, small leaks, spills, or drips from closed loop systems.
Treatment of these hazardous substances and their by-products is achieved by physical and
biological activity in the ash basin. Boiler cleaning chemicals are listed in Table 2.
*Listed in 40 CFR 302.4 - Table 302.4 List of Hazardous Substances and Reportable Quantities.
Supplemental Information

Y f'
NC #0004961 Permit Renewal Application
May 23, 1994
Page 17 of 18
V. 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. NC#0004961
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. The
character of the thermal discharge has not changed since the original 316(a)
determination. Accordingly, Duke requests that the thermal limitations as
modified in the present permit be continued. Riverbend Steam Station has
been operating within the EPA nomograph for delta T at outfall 001 since
July 26, 1993.8
VI. Ash Basin Capacity
Part III Section U of the existing NPDES permit for RSS requires the
permittee to provide and maintain at all times a minimum free water volume
(between the top of the sediment level and the minimum discharge elevation)
equivalent to the sum of the maximum 24 hour plant discharges plus all
direct rainfall and all runoff flows to the pond resulting from a 10 year, 24
hour rainfall event, when using a runoff coefficient of 1 .0.
Free water volume of ash basin at RSS:
Estimate of runoff from 10yr/24 hr storm
Natural drainage area of ash basin 98.7 acres
Powerhouse yard area 21.8 acres
Precipitation from 10yr/24 hr storm 5 inches
Total stormwater runoff to ash basin 50.21 Ac-ft
8Reference letter to Mr. John Carter (DPC) from Mr. Steve Tedder (NCDEHNR) dated 7/26/93.
Supplemental Information

- t. e
NC #0004961 Permit Renewal Application
(1 May 23, 1994
Page 18 of 18
Estimate max. 24 hr dry weather waste stream discharging to ash basin:
From station records, maximum recorded ash basin discharge
(obtained weekly): 10.66 MGD
For conservatism, increase maximum discharge recorded at station by
10%: 35.99 Ac-ft
Free Water Volume = 50.21 + 35.99 = 86.2 Ac-ft •
Estimate quantity of solids (ash) to be discharged to ash basin during life of
permit: (ref. PROMOD analysis for base coal consumption dated 2/21/94)
Year Estimated Coal Assumed Estimated Ash Estimated Ash
Consumption Ash % Production Production (Ac-ft)'
(1000's tons) (1000's tons)
1994 442 10 44.2 36.9
1995 357 10 35.7 29.8
1996 627 10 62.7 52.3
1997 561 10 56.1 46.8
1998 748 10 74.8 62.4
I Total 2735 273.5 228.3
Estimate of total storage volume required for term of permit:
228.3 + 86.2 = 314,5 Ac-ft.
As of 8/25/93 estimate of total ash basin water volume:
Primary cell water volume: 88.3 Ac-ft (elev. 725 MSL)
Secondary cell water volume: 389.9 Ac-ft (elev. 715 MSL)
Estimate of total ash basin water volume = 88.3 + 389.9 = 478.2 Ac-ft
Volume required = 314.5 Ac-ft < 478.2 Ac-ft
Conclusion: The ash basin at RSS has sufficient capacity for the term of the new
permit.
Supplemental Information

PLEASE PRINT OR TYPE IN THE UNSHADED AREAS ONLY. You may report some or all of EPA I.D.NUMBER(copy from Item 1 of Form 1) Form Approved _
this information on separate sheets(use the same format)instead of completing these pages. OMB No.2040-0086
SEE INSTRUCTIONS
NC0004961 Approval expires 7-31-88
'Ni.INTAKE AND EFFLUENT CHARACTERISTICSriz `- 1,. `` ". . W' Y' k#tit` :':' \\#\��OUTFACE NO.
(continued from page 3 of Form 2-C) MME , z:, *�:NI : ; ' <:'•.i is z`: ,'z�.`'.`kie title','' �''`z` • Riverbend 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.INTAKE(optional)
1.POLLUTANT a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If available) (If available) d.NO.OF a.Conan b.Mau b.NO.OF
(1)Concentration (2)Mass (1)Concentration (2)Mass (1)Concentration (2)M
a.Biochemical Oxygen 1.7 3099.8 _ ass ANALYSES talon (1)Concentration (2)Mass ANALYSES
1 mg/I lb/Day 0.4 453.8 1
Demand(BOO)
b.Chemical Onrygen 13.7 24980.3 1 mg/I lb/Day < 10• < 11345.0 1
Demand(COD)
c.Total Orgardc 2.7 4923.1 1 mg/I lb/Day 2 2269.0 1
Carbon(TOC)
d.Tow appended• 8 14587.1 1 mg/I lb/Day 8 9076.0 1
Solds(TSS)
•.Ammmia(as N) < 0.05 < 91.2 1 mg/I lb/Day < 0.05 < 56.7 1
4.FUN VALUE VALUE VALUE MGD X VALUE
218.5 CR 135.95 CR
g.Terp•ratte VALUE VALUE VALUE VALUE
•
("timer) 17.3 DEGREES CELSIUS 7.5 366
`Ii.Tenperatte VALUE VALUE VALUE VALUE
(sinner) DEGREES CELSIUS
I.pH MINIMUM MAXIMUM MINIMUM MAXIMUM g\-c:t\.•�\,` .\ IRKS kN \' `2„k:",\` ,.��:2"• 'Z"•.:',�-•�, .:.`tie
7 A \��:K .............:.;Ais::,:z 1 STANDARD UNITS ` htWA\\,`\\@�\a `a\..'l.it3s 'kVa";
PART B-Mark"X"in column 2a for each pollutant you know or have reason to believe is present.Mark'X'in column 2b 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.
1.POLLUTANT 2.MARK'`X' 2.EFFLUENT 3.UNITS 4.INTAKE(optional)
AND CAS NO. a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(X available) cue- b.ab- (If available)
(H available) d.NO.OF a.Concern- D.Mass D.NO.OF
sent sant (1)Coe entalon (2)Mass (1)Concentration (2)Mass (1)Ccocentralon (2)Mau ANALYSES talon (1)CorcxAation (2)Mass ANALYSES
a.Bromide X < 1.2 < 2188.1 1 mg/I lb/Day < 1.2 < 1361.4 1
(24959-67-9)
b.C;aorine. X < 0.5 < 911.7 1 mg/I lb/Day < 0.5 < 567.3 1
Total Residual
c.color X 17.5 X 1 Std.Units X 10 X 1
d.FOCIII X 46 X 1 Colonies X 4 X 1
Conform
/100 ml
e.Flouids X < 0.1 < 182.3 1 mg/I lb/Day < 0.1 < 113.5 1
(16964-46.6)
If.Nltate- X 0.37 674.7 1 mg/I lb/Day 0.36 408.4 1
Mille(as N)
EPA Form 3510-2C(Rev.2-85) PAGE V-1 CONTINUE ON PAGE V-2

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Foam Approved
ITEM V-B CONTINUED FROM FRONT NC0004961 Riverbend 001 OMB No.2a°s7
Approval etplrsf 7-3-31.68
1.POLLUTANT 2.MARK•X• 3.EFFLUENT _ 3.UNITS 4.INTAKE(optional) _
AN( ((`��,q�NO. a.MAXIMUM DAILY VALUE b.MP CIIMU 1130 DAY VALUE c.LO GERM AVG.VALUE a.LONG TERM AVG.VALUE
av�Nsbla) a pre D.aD Isbbl) Q No.OF a.Concar- D.Mass D.NO.OF
Nlto sent sent (1)Cancan alon (2)Mass (1)Cancertaton (2)Mass (1)Concerwalan (2)Mass ANALYSES talon (1)Cancentral on (2)Mess ANALYSES
Cl. Tosil°mink X 0.65 1185.2 1 mg/I lb/Day 0.4 453.8 1
(as NL
08 and
h Grasse X < 0.1 < 182.3 1 mg/l lb/Day < 0.1 < 113.5 1
Phosphorous X 0.005 9.1
1;7 14-oy 1 mg/I lb/Day < 0.005 < 5.7 1
1.Racloaclvlty
II(1) foaal X 1.1 X
1 pCi/I X < 0.17 X 1
(2)BetaTotal X 3.48 X
1 pCUI X 2.62 X 1
(3)R TotalTo X < 1 < X
1 pCUI X < 1 X 1
(4)R 228,TOOK X <
1 < X 1 pCii/1 X < 1 X 1
k Seats
(t(■4 s 304)6) X 5.76 10502.7 1 mg/I lb/Day 5.8 6580.1 1
t SWlds
(as S) X < 1 < 1823.4 1 mg/I lb/Day < 1 < 1134.5 1
m.Sulfite
(1i
as266-45.$O3)3) X < 1 < 1823.4 1 mg/I lb/Day < 1 < 1134.5 1
in.SuRactants
X < 0.1 < 182.3 1 mg/I lb/Day < 0.1 < 113.5 1
Mirk
c. Taotat X 0.3 547.0 1 mp/I lb/Day 0.14 158.8 1
(7429-90-5)
P.11�aTotal X 0.02 36.5 1 mp/I lb/Day 0.01 11.3 1
(744a39.3)
I q.Boron,
Total X 0.05 91.2 1 mg/I lb/Day 0.03 34.0 1
(7440-424)
c Cobalt,Total X < 0.05 < 91.2 1 mg/I lb/Day < 0.05 < 56.7 1
(7440-46-4)
1 s.Won,Total
(743949 6) X 0.42 765.8 - 1 mg/I lb/Day 0.29 329.0 1
magnesium,T' X 1.1 2005.7 1 m9/1 lb/Day 1.1 1248.0 1
I (7439-95-4)
u.Moybdarsm,
Total X < 0.06 < 109.4 1 mg/I lb/Day < 0.06 < 68.1 1
(7439-96-7)
.Manganese.Total X 1.1 2005.7
(7439-96-5) 1 mg/I lb/Day 0.002 2.3 1
.Tln,ToDL
(7440-31-5) X < 0.5 < 911.7 1 mg/I lb/Day < 0.5 < 567.3 1
Titanium,
TotalTo X < 0.04 < 72.9 1 mg/I lb/Day < 0.04 < 45.4 1
(7440-32-6)
EPA Form 3510-2C(Rev.2-55) PAGE V-2 CONTINUE ON PAGE V-3

•
' --\
EPA 1.0.NUMBER(copy from Item 1 or Form 1) OUTFALL NUMBER Form Approved _
OMB No.2040-0086
CONTINUED FROM PAGE 3 OF FORM 2-C NC.0004961 Riverbend 001 Approval expires 7-31-66
PART C-If you are a primary Industry and this outrancontains 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 2 for
acrolein,acrylonitrile,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
believe 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 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(all 7 pages)for each outfall.See instructions
for additional details and requirements.
1.POLLUTANT 2.MARK'X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AN(D i
NO. ogra' cob a.MAXIM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(K l (Ir available) (II evs ) d.NO.OF a.Concen- b.Mass d.NO.OF
.d f 1)Cancwtdon (2)Mass (1)Cancerrtafan (2)Mass (1)conc.g Callon (2)Mass ANALYSES tration (1)Cancantatlan (2)Mass ANALYSES
METALS,CYANIDE,AND TOTAL PHENOLS -
1M.Aramory. X < 1 ' < 1.82 1 ug/l lb/Day < 1 < 1.13 1
Toed(7440-36-0)
2M.Arsaric,Tow X < 1 < 1.82 1 ug/l lb/Day < 1 < 1.13 1
S744038-2)
3M.SWAM X < 0.5 < 0.91 1 ug/I lb/Day < 0.5 < 0.57 1
Total(7440.41-7)
4M.Cadmium. X 2.9 5.29 1 ugh lb/Day 0.47 0.53 1
Toed(744043-9)
5M.C1san+rm. X 2.8 5.11 1 ug/I lb/Day 2.4 2.72 1
Toed(7440-47-3)
6M.copper.Tar X 0.04 72.94 1 mg/I lb/Day 0.02 22.69 1
4144asaa)
7M.Laad,Total X 2 3.65 1 ugh lb/Day < 2 < 2.27 1
57439-92-1)
6M.Mwary,Toed X < 0.1 < 0.18
(7439-97-6) 1 ugh lb/Day < 0.1 < 0.11 1
9M.Ndrat,Total X < 2 < 3.65 1 ug/1 lb/Day < 2 < 2.27 1
S7440.02-0)
10M.Selene" X 4.4 8.02 1 ugh lb/Day 3 3.40 1
Toed(7762-49-2)
11M.SIMer,Tour X < 0.2 < 0.36 1 ugh lb/Day < 0.2 < 0.23 1
(7440.22-4)
12M.Th.au. X < 0.2 < 364.7 1 mg/I lb/Day < 0.2 < 226.90 1
Toed(7440-26-0)
13M.Doc.Total X 0.02 36.47 ' . 1 mg/I lb/Day < 0.01 < 11.35 1
(7410 666)
14M.cyeride• X < 0.01 < 18.24 1 mg/1 lb/Day < 0.01 < 11.35 1
Toed(67-12-6)
16M.Phenols. X < 0.01 < 18.2 1 mg/I lb/Day < 0.01 < 11.35 1
Toed
DIOXIN
2.3,7.E Tata DESCRIBE RESULTS
aroroau«rco P X
Dlcodn(1764 11-0)
1
EPA Form 3510-2C(Rev.2-66) PAGE V-3 CONTINUE ON PAGE V-4

EPA I.D.NUMBER(copy trom Item t of Form 1) OUTFALL NUMBER FormApproved
OMB No.2040-0656
CONTINUED FROM PAGE V-3 NC.0004961 Riverbend 001
Affront metres 7-31-88
,1.POLLUTANT 2.MARK'X" 3.EFFLUENT _ 4.UNITS 5.INTAKE(optional)
AND CAS NO. a.rr b. c.ab. a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE C.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If avaikds) 4k- $ surf (It avallabbJ (It available) (If available) d.NO.of a.Concen- b.Mass d.NO.OF
_ Id (1)ConcaAatlon (2)Mau (1)Concentrian (2)Mau (1)Concentration (2)Mass ANALYSES tratlon 1 Concentration
{) (2)Mau ANALYSES
`GC/MS FRACTION-VOLATILE COMPOUNDS
IV.Aaarn X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
J107.02-8)
2V.AaybritlN X <
10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
(107-13-1)
3V.Barcena X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
(71-43-2)
14V.BIa(C ioro•
m tyf)Eter X X X 1 ugh lb/Day X X 1
(542-08.1)
'5V.Branoram X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
(75-25-2)
6V.Carbon
1 act+afd. X < 2 < 3.651 uy/I lb/Day < 2 < 2.27 1
(5 )
7V.Ctioraba¢ae X < 2 < 3.65 1 uy/I lb/Day < 2 < 2.27 1
(108-90-7)
bromom.t� rn.
X ` 2 < 3,85 1 uy/I lb/Day < 2 < 2.27 1
+(124-4b1)
lev.Ctiawtan. X < 2 < 3.651 uyl lb/Day < 2 < 2.2/ 1
75-00•3)
toy.2•Cfioro-
etrOAN Etar X < 2 < 3.65 1 up/l lb/Day < 2 < 2.27 1
(1 to-75-e)
11V.Ctia m ofa X < 5 < 9.12 1 up/I lb/Day < 5 < 5.6/ 1
(67-66.3)
12V.b en°�:°: X <
2 < 3.65 1 up/I lb/Day < 2 < 2.27 1
(7527.4)
13V.D clloro-
575 StI X ` 2 < 3.65 1 up/I lb/Day < 2 < 2.27 1
114V.1.1-bla oro. X < 2 < 3:Tj 1 up/1 lb/Day < 2 < 2.2/ 1
ketere(75-34-3)
15V.1.2-Ded,bro. A < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
1 store(107-06.2)
116V.t,t- d1oro- X < 2 < 3.65 1 uyfl 15/Day < 2 <
L 2.27 1
etri re(75-35-4)
17V.1,2-O cPloro. X < 5 < 9.12 -1 u lb/Day < 5 <yll 5.67 1
prcpar.(78d7-5)
18V.t,3•Dlctioro- A
< 2 < 3.65
'propy4en.(542-75-6) 1 uy/I lb/Day < 2 < 2:27 1
I19V.EtrAantare X < 2 < 3.65 1 KO Ib✓Day < 2 < 2.27 1
iIt00.41-4)
2 1.Metfyf X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
Branid.(74 83-9)
21V.Metryl X < 2 '< 3.65 1 uy/I 15/Day < 2 '< 2.27 1
;Ctbrtde(74-87-3)
EPA Form 3510-2C(Rev.2-85) PAGE V-4 CONTINUE ON PAGE V 5

•
EPA I.D.NUMBER(copy from Bern 1 of Form 1) OUTFALL NUMBER Form BPPr
wed
CONTINUED FROM PAGE V-4 NC.0004961 Riverbend 001 AA p8No.a Oj-31.88
1.POLLUTANT 2.MARK"X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional) _
AND CAS NO. art taw- cab- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(n ayst bM) Wr- sdnt aetI (If avalkda)
No.OF
� (K walrble) (n avahsbM) a.NO.OF a.Concen- b.Maas
(1)Concsr*alon 1(2)Mass (1)Cancarrtaton (2)Mess (1)Concent.lon (2)Mess ANALYSES tration ANALYSES
GC/MS FRACTION-VOLATILE COMPOUNDS(continued) (1)Centat«n (21M.es
22V.Methylene X < 5 < 9.12 1 uy/I lb/Day < 5 < 5.67 1
Chloride(75-09-21
23V.1,1,2,2-Tet s-
dlaoel.ne X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
(79-34-5)
24V.Tetadloro- X < 2 < 3.65
etylene(127-18-4) 1 ugh Ib/Day < 2 < 22/ 1
25V.Tavar X < 2 < 3.65
1 ugh lb/Day < 2 < 2.27 1
(708-88-3)
26V.1,2-Tran.-
aaloroeaMar X < 2 < 3.65 1 up/I lb/Day < 2 < 2.27 1
(156-60-5)
27V.1,1,1-Tn-
chloro.l.n. X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
(71-5-6)
28V.1,1,2-7i-
nlaoe1hene X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
(79-00-5)
29V.TrIchloro- X < 2- < 3.95
1 ugh 16/Day < 2 < 2.27 1
atnytene(79015)
30V.Trktloro-
n.oran.t ene X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
(75-894)
31V.VI yl X < 2 < 3.65 • 1 ugh lb/Day < 2 < 2.27 1
Chloride(7501-4)
GC/MS FRACTION-ACID COMPOUNDS
1A 2-hlaopnara X < 10 18.24 1 ugh lb/Day < 10 < 11.35 1
(95-57-8)
2A 2,4-D dloro- X < -10 T824 1 ugh Ib/Day < 10 -< 11.35 1
phenol(120-83-2)
3A 2.4-Dlmety4 X < 10 - T8.24 1 ugh lb/Day < TO -< T1.35 1
Phenol(105-67-9)
4A 4,6-01rlto-0- X < 10 ' -T8.24 1 ugh - Ib/Day < 10 < 11.35 1
Creed(534.52-1)
5.4.2,4-01m b- A < TO 48.24 1 uy/I lb/Day < 10 < 11.35 1 '
phenol(a 1-28-5)
6A 2-Nltopwgl X < TO 1824
f ugh 76/Day < 10 < T1.35 1
(ea•7sa)
7A 4-NHnphand X < 10 18.24
ugh lb/Day < TO < 11.35 1
(too-o2-7)
aA P-cnoraM- X < 113 18.24 1 ugh Ib/Day < 10 < 11.35 1
Cresol(59-50-7)
9A Paacttoro- X < 10 18.24 1 ugh lb/Day < 10 < 11.35 1
phenol(87-065)
10A Phenol X < 10 18.24 1 uy/I lb/Day < 10 < 11.35 1
(108-95-2)
t to 2,4,6-18- .
dloropnand X < 10 18.24 1 uy/I lb/Day < 10 < 11.35 1
(88.06-2) _
EPA Form 3510-2C(Rev.2-85) PAGE VS CONTINUE ON PAGE V-6

•
EPA I.O.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
OMB No.2040-0386
CONTINUED FROM PAGE V-5 NC.0004961 Riverbend 001 Approval epkes7-31-88
1.POLLUTANT 2.MARK"X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional) _
AND CAS NO. e.n- :As- cab- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a:LONG TERM AVG.VALUE
i (n avenads) q�r- eel s.nl (n.v.lYde) ���� (n avalrble) (n wewDls) d.NO.of a.Concert- b.Mass d.NO.of
ed _ S1)Concentration IR)Mass .111Concentralan l)Mess (1)Concertalon (2)Mess ANALYSES (ration (1)Concentreson (2)Mass ANALYSES
GC/MS FRACTION-BASE NEUTRAL COMPOUNDS
18.Aceraphtirn X < 10 < 18.24 1 KO lb/Day < 10 < 11.35 1
(83-32-9)
28.Acenaphn4ene X < 10 < 18.24 1 uy/l Ib/Day < 10 < 11.35 1
( 96-8)
38.Artracene X < 10 < 18.24 1 ua/1 lb/Day < '10 < 11.35 1
(120-12-7)
411.Benadr» X < 50 < 91.18 1 uy/I lb/Day < b0 < 56.73 1
(92-87-5) NOTE I NOTE 1
58.Berea(s)Oar X < 10 < 18.24 1 VI lb/Day < 10 < 11.35 1
6B.Bento(a) X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
Pharr(50-32-8)
7B.3,4-Banco •
Yluoranrrrr X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
(205.99.2)
88.Servo(f 4) X < 10 < 18.24 1 uy/1 lb/Day < 10 '< 11.35 ' 1
.Perytens(191-24-2)
9B.Berea(k)
Flua annene X < 10 < 18.24 1 up/1 lb/Day < 10 < 11.35 1
(207-069)
,10B.as(2Gyoro• .
(t tt- t)-t)etros X < 10 < 18.24 1 u4/1 lb/Day < 10 < 11.35 1
'11B.Ns(2-Ctioro
( )-Ether) X < 10 < 18.24 1 uyl lb/Day < 10 < 11.35 1
128.13Is(2-CHornlso
(pio„ 11))ar X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
13B.Ns(2-Etrd-
nex;4)PnaMrr X < 10 < 18.24 1 ugh lb/Day 25 28.38 1
(1t -81.7)
148.4-PpB►Iromot-
Elrr(tot-5S3) X < 10 < 18.24 1 ug/l lb/Day < 10 < 11.35 1
1se.Buhl Benryl X < 10 < 18.24 T ugh lb/Day < 10 < 11.35 1
PlltrYte(65-68-7)
168.2-Chloro
naprtatsne X < 10 < 18.24 . 1 u9/1 lb/Day < 10 < 11.35 1
(91-58-7)
178.4-Ctloro-
ptlarlyl Ptrryl X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1 '
Ether(700672J)
188.Qrys«r X < 10 < 18.24 " 1 ugh lb/Day < 10 < 11.35 1
f218-01-9)
198.Deem(a,h) '
A+traoarr X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
(53-70.3)
208.1,2-dchloro- X < 10 < 181.24 1 ug/I - lb/Day < 10 < 11.35 1
herein*(95-50-1) ,
21B.1,3-Dkhloro. X < 10 < 1824 1 Ugh 167Day < 10 < 11.35 1
Wrestle(541-73-1)
EPA Form 3510.2C(Rev.2-85) PAGE V-6 CONTINUE ON PAGE V-7
NOTE 1:This compound carrot be accurately t anlrrd using EPA Melgd 625;reported concantrelorr should be regarded as approdmelons.

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Font)Approved
CONTINUED FROM PAGE V-6 NC.0004961 R)veybend 001 OMB No.20440086
Awned wires 7-31-88
1.POLLUTANT 2.MARK"X' 3.EFFLUENT 4.UNITS 5.INTAKE(optiona6
AND CAS NO. a.re- 1st rr. c..D- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(d m8aole) q.4r- sMc soot (Ir avelyde) (If aro��) (n comae) a NO.OF a.Concen- b.Mass d.NO.OF
ed 1 Concentalon I(2)Mass _(1)Concer*alon (2)Mass (1)Concerrtallcn (2)Mess ANALYSES tration (1)Cancent'alon (2)Mass ANALYSES
GC/MS FRACTION-BASE/NEUTRAL COMPOUNDS(continued)
228.1,4-D4woro- X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
benzene(10(3-46-7)
o.n to pc ' X < 10 < 18.24
(91-94-1) 1 ugh lb/Day < 10 < 11.35 1
248.Casty P1Rolate X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
(84-66-2)
zse.Dtrotyl Phlhelate X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
(131.1131-1tJ)
2Rut 68.DIN-BuM 1 ugh lb/Day < 10 < 11.35 1
X < 10 < 18.24(84-74-2)
278.2,4-D4nlro. X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
10hwne(121-14-2) ,
28B.2,601nllto- X < 10 < 18.24 1 ug/I lb/Day < 10 < 11.35 1
tokens(606.20-2)
29+elate X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
(117-84-0)
308.1,2-Dlpnerry4-
trydra ri.)(as Azo-) X < 10 < 18.24 1 up/l lb/Day < 10 < 11.35 1
beze318.Elmorant.ns X < 10 < 18.24 1 VI lb/Day < 10 < 11.35 1
(206.44-0)
328.Ftrorene X < 10 < 18.24 1 uy) lb/Day < 10 < 11.35 1
(86-73.7)
338.Nexaasoro- X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
benzene(118-74-1)
348.Nem-
asoroowdene X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
(87-68-3)
358.Meluasoro-
cycopenhiclene X < 10 < 18.24 1 ugh lb/Day < 10 - < 11.35 1
(77-47-4)
36B.Narmchore- X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
stone(87-72-1)
378.tWxsf
1,2,3c8 )d Py.ns r X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
193.3 .
388.teophaone X < 10 < 18.24 1 u9/1 lb/Day < 10 < 11.35 1
(78.59-1)
398.Nepflhalens X < 10 < 18.24 1 VI lb/Day < 10 < 11.35 1
(91-20-3)
408.Nltobenzene X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
(98-95-3)
418.N-Nlto-
{62-759 X < 10 < 18.24 1 u9/1 lb/Day < 10 < 11.35 1
462t28.N P�toao6-
X 1 VI lb/Day < 10 < 11.35 1
rensAarrens _ 10 < 18.24
-04 I
EPA Fam 3510.2C(Rev.2-85) PAGE V-7 CONTINUE ON PAGE V.8

•
EPA I.O.NUMBER(copy from Item 1 o1 Form 1) OUTFALL NUMBER Form Approved
OMB No.2040-0386
CONTINUED FROM PAGE V-7 NC.0004961 Riverbend 001 Approval expires7-31-88
1.POLLUTANT 2.MARK'X" 3.EFFLUENT 4.UNITS 5.INTAKE.(optional)
ANC)CAS NO. oprr - � a.MAXIMUM DAILY VALUE b. IM 1Mu130 DAY VALUE c.LOjG (�M AVG.VALUE a.LONG TERM AVG.VALUE
pr aw bb) . d.NO.OF a.Conan- b.Mass d.No.OF
( _ ed _ _ (1)Concerrta/on I(2)Mass (1)Concentalon (2)Meu (1)Ccncerwstlon (2)Mass ANALYSES tration (1)Carwentstlan (2)Mau ANALYSES
GC/MS FRACTION-BASE/NEUTRAL COMPOUNDS(continued)
43B.N-Nlto
aoapnerrAnine X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
(8630-6)
•
44B.Ftenantirena X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
(85-01-0)
45B.Pyrens X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
(129-00-0)
46B.1.2.4-T6
c140roberaene X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
(120-82-1)
GC/MS FRACTION-PESTICIDES
1 P.AldrIn X
S309-00-2)
2P.alpha-BHC X
(319-84-6)
3P.beta-BNC X
S315 85-7)
4P.9arrne-BHC .X
(58-89-9)
•
5P.deUtBHC X
(319-86-8)
6P.Diorama X
(57-74-9)
7P.4,4'-00T X
(50.29-3)
8P.4,4'-DDE X
(72-55-9)
9P.4.4'-000 X
(72-54-8)
10P.ClektIn X
(60-57-1)
11P.aghe-Endosrtlan X
(115-29-7)
12P.bete-EndoaRan X .
(115.29-7)
13P.EndoeuNan
Steals X
(1031-07-0)
14P.Entrtl X
(72-20-8)
15P.En01n
Aldehyde X
(7421-93-4) •
16P.HeptcNor X
(7w4-8)
EPA Form 3510-2C(Rev.2-85) PAGE V-8 CONTINUE ON PAGE V-9

•
EPA I.D.NUMBER(copy from Item 1 of Forth 1) OUTFALL NUMBER Form Approved
OMB No.2040.0086
CONTINUED FROM PAGE V-8 NC.0004961 Riverbend 001 Approval acres 7-3148
1.POLLUTANT 2.MARK'X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AN CAS NO. an b. c.s - a.MAXIMU DAILY VALUE b.M. MUI�,t 30 DAY VALUE c.LOG M AVG.VALUE a:LONG TERM AVG.VALUE
(Q M,bts) q�r a rx s.nt (Ira ) (n.vaBabis) d No.of a.Concen- b.Mass a NO.OF
_ ed _ (1)CoKwrfslon I(2)Mess (1)ConceMalan (2)Mess (1)Canrartalan (2)Mess ANALYSES tration (1)Conoertratlon ()Mess ANALYSES
GC/MS FRACTION-PESTI
17P.Heptachlor
• Epodde X
(1024-57-3)
16P.PCB-1242 X
(53469-21-9)
19P.PCB-1254 X •
'(11097-69-1)
20P.PCB-1221 X
(11104-28-2)
21P.PCB-1232 X
(11141-16-5)
22P.PCB-1248 X
(12672-29.6)
23P.PCB-1260 X
(11096-82-5)
24P.PCB-1016 . X
(12674-11-2)
25P.Toxeplrne X.
(8001-35-2)
EPA Farm 3510-2C(Rev.2-85) PAGE V-9

PLEASE PRINT OR TYPE IN THE UNSHADED AREAS ONLY. You may report some or all of EPA I.D.NUMBER(copy from Item 1 of Form 1) Form Approved
this information on separate sheets(use the same format)instead of completing these pages. OMB No.2Q4G0086
SEE INSTRUCTIONS NC0004961
Approve eras 7-31-88
;;`'`\C.4i :( ;:..:'��##\:lei::: ;';:•::::;: ;;:•'::;;;;;;>�:;:cti :;::#:�:(;•::. :: : \3 OUTFACE NO.
V.INTAKE AND EFFLUENT CHARACTERISTICS(continued from page 3 of Form 2 C) N C AI d \� \� ,a} `„`,'"z ZZ\?ki\ W...as ? N 4 Riverbend 002
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.INTAKE o•iona
1.POLLUTANT a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If wallabies) Of ays11 t e) d.NO.OF a.Cancer► b.Mass b.NO.OF
(1)Concwnta8on (2)Mass (1)Comareabon ,(2)Mass (1)Concentration (2)Mass ANALYSES Mon
BiochemicalBiochemical (1)Concentration (2)Mass ANALYSES
a. Oxygen 0.4 22.6 1 mg/I lb/Day 0.4 453.8 1
Demand(BOO)
b.Chemical Oxygen < 10 < 564.1 1 mg/I lb/Day < 10 < 11345.0 1
Demand(COD) •
c.Total Organic 1.3 73.3 1 mg/I lb/Day 2 2269.0 1
Carton(TOC)
Id.Tom suspended 33 1861.6 1 mg/I lb/Day 8 9076.0 1
Sold.(TSS)
1
l a.Animals(as N) < 0.05 < 2.8 1 mg/I lb/Day < 0.05 < 56.7 1
.Flow VALUE VALUE VALUE MGD X VALUE
6.76 1 CR 135.95 CR
g.Tempe/alum VALUE VALUE VALUE VALUE
(ter) 7.3 DEGREES CELSIUS 7.5 1
tn.Tenpeatra VALUE VALUE . VALUE VALUE
(srranef) DEGREES CELSIUS
.pH MINIMUM MAXIMUM MINIMUM MAXIMUM „\`��.,,, :��2'.\•\:\:``'.C`, �`:`\2� \C`''���.'`. �`�\\�: �\�"` \�:,,�`\\:�`�\�t \� `��\` :`:= `�1v �`� \�:
7.97 ` \ W z z b• 1 STANDARD UNITS . ',��',:W` .1.....,; \W ,%1: ,•'Vti .: z''.�.ttz '
PART B•Mark'X'In column 2a for each pollutant you know or have reason to believe is present.Mark"X'in column 2b 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.
1.POLLUTANT 2.MARK'X' 2.EFFLUENT 3.UNITS 4.INTAKE(optional)
AND( acts-CAS NOIt available) . a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
pt. Deb- (If minds) (If available) d.NO.OF a.Concert- b.Mass b.NO.OF
sent sans (1)Concentration (2)Mass (1)Canceda/on (2)Mess (1)Concentration (2)Mass ANALYSES talon (1)Concentration (2)Mass ANALYSES
a.Bromide X < 1.2 < 67.7 1 mg/I lb/Day < 1.2 < 1361.4 1
(24959-67-9)
b.Chlorine, X < 0.5 < 28.2 1 mg/I lb/Day < 0.5 < 567.3 1
Total Residual
c.Color X 7.5 X 1 Std.Units X 10 X 1
•
d.Fecal X 23 X 1 Colonies X 4 X 1
Collornn /100 MI
a.FIoulda X 0.17 9.6 1 mg/I lb/Day < 0.1 < 113.5 1
(1596H8-8)
.Ms. X 0.35 19.7 1 mg/I lb/Day 0.36 408.4 1
Minds.
Nttrlta(.s N)
EPA Form 3510.2C(Rev.2-65) PAGE V-1 - --- CONTINUE ON PAGE V-2

EPA 1.0.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
ITEM V-B CONTINUED FROM FRONT
NC0004961 OMB No.26/607
Riverbend 002 Approval erarares 7-3-31$8
•
1.POLLUTANT 2.MARK-A" 3.EFFLUENT 3.UNITS 4.INTAKE(optional)
AVG.VALUE
AN CA NO. a.MAXIMUM DAILY VALUE b. IMU(� TAM a.LONG TERM AVG.VALUE
( ) a.Pra• D.aaf avaNabM)30 DAY VALUE e.LOOG
ava k d.NO.OF U.Cancan- b.Mass b.No.OF
sent sant 11)Comentafan (2]Mass _I1)Concentration S2)Mass (1)Cancentatlon (2)Mass ANALYSES talon (1)Concentraton (2)Mass ANALYSES
gN
oualOrpr+e X 0.25 14.1 1 mg/I lb/Day < 0.4 < 453.8 1
(as NL .
h OM and
Grease X < 0.1 < 5.6 1 mg/I lb/Day < 0.1 < 113.5 1
1.Pnoaprro(rosups)�
(a7 IT:01_ X 0.04 2.3 1 mg/I lb/Day < 0.005 < 5.7 1
).Radoachtty
(1)friPha
feral X 1.04 X 1 pCl/I X < 0.2 X 1
(2)Balm'row X 6.9 X
1 pCl/I X 2.6 X 1
(3)Rectum,
Total X < 1 X 1 pCl/I X < 1 X 1
(4)R cittn
226,Total X < 1 X
1 pCl/I X < 1 X 1
K.Sulfate
(1(a4 s 304))a) X 42 2369.3 1 mp/I lb/Day 5.8 6580.1 1
t snide
(as s) X < 1 < 56.4 1 mg/I lb/Day < 1 < 1134.5 1
m Sul(f11a
(1(isas 9).3)
X < 1 < 56.4 1 mp/I lb/Day < 1 < 1134.5 1
n.Surfactants 1 ,
X < 0.1 < 5.6 my/I lb/Day < 0.1 < 113.5 1
a.Atankurn,
Tal(742 X 1.26 71.1 1 my/I lb/Day 0.14 158.8 1
Bel
p. Total'T X 0.09 5.1 1 m9/I lb/Day 0.01 11.3 1
(74.0-39.3)
4 Boron,
ow X 0.21 11.8 1 mp/I lb/Day 0.03 34.0 1
(744042-8)
r Cobalt,Total X < 0.05 < 2.8 1 my/I lb/Day < 0.05 < 56.7 1
(7440.454)
a.Iron.Total
(7439-89-6) X 0.67 37.8 . 1 m9/I lb/Day 0.29 329.0 1
t Maw Total
ow X 1.6 90.3 1 mg/I lb/Day 1.1 1248.0 1
(2439-95-4)
u
Total X 0.08 4.5 1 mg/I lb/Day < 0.06 < 68.1 1
(7439-98-7)
v.Manganese,
Total X 0.04 2.3 1 mg/I lb/Day 0.02 22.7 1
(7439-96-5)
w.Two744o Tom
( 1 mg/I 'lb/Day < 0.5 < 567.3 1
a14) X < 0.5 < 28.2
v..Thorium
(74T0.332-6)) X 0.09 5.1 1 mp/I Ib/Day < 0.04 < 45.4 1I
-- -
EPA Form 3510-2C(Rev.2-85) PAGE V-2 CONTINUE ON PAGE V-3

•
EPA I.O.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Farm Approved -
. OMB No.20400056
CONTINUED FROM PAGE 3 OF FORM 2-C NC0004961 Riverbend 002 Approvalesplres 7.31-66
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,
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
acrolein,acrylonitrile,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
believe 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 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(all 7 pages)for each outfall.See instructions
for additional details and requirements.
1.POLLUTANT 2.MARK'X" 3.EFFLUENT 4.UNITS_ 5.INTAKE(optional)
AN(D NO. s a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(n rsble) iN wallets)wallets) we le
d.
NO.of a.Corwen- b.Mass d.NO.of
ad (1)Conourtallar (2)Mass (1)Concer*aIon (2)Mess (1)Concentration (2)Mass ANALYSES tratlon (1)Ganceratiion (2)Mass ANALYSES
METALS,CYANIDE,AND TOTAL PHENOLS
1M.Nierr ry, X 1.5 0.08 1 ugh lb/Day < 1 < 1.13 1
Total(7440-36-0)
2M.Arsenic,Total X 44 2.48 1 ugh lb/Day < 1 < 1.13 1
57440-3b2)
3M.BeryIun, X < 0.5 < 0.03 1 ug/I lb/Day < 0.5 < 0.57 1
Total(7440-41-7) -
4M.Cadrriun, X 2 0.11 1 ugh lb/Day 0.47 0.53 1
Total(7440.43-9)
5M.Chromium. X 7.2 0.41 1 ugn Total(7440-47-3) lb/Day 2.4 2.72 1
5M.Copper,Tour X 0.03 1.69 1 mg/I lb/Day 0.02 22.69 1
(7440-60-6)
7M.Lead,Total X 4.1 0.23 1 ugh lb/Day < 2 < 2.27 1
(7439-92-1)
M.Mercury.Total X - < 0.1 < 0.01 1 ugfl lb/Day < 0.1 < 0.11 1
(7439-974)
9M.Nickel,Tar X 9.6 0.54 1
(7440-02-0) ugJ1 lb/Day < 2 < 2.27 1
10M.SeNrirm, X 3.2 0.18 1
Toad(7752-49-2) ug/I lb/Day 3 3.40 1
11M.SNAer,Total X < 0.2 < 0.01 1 ugh) lb/Day < 0.2 < 0.23 1
(7440-22-4)
12M.Them, X < 0.2 < 11.3 1 mg/I lb/Day < 0.2 < 226.90 1
Total(7440.28-0)
13M.zinc,Tar X 0.02 1.13 1 mg/I lb/Day < 0.01 < 11.35 1
(7440466)
14M.Cyerld., X < 0.01 < 0.56 1 mg/I lb/Day < 0.01 < 11.35 1
TOW(57-12-5)
15M.Peels. X . < 0.01 < 0.6 1 mg/I lb/Day < 0.01 < 11.35 1
Total
DIOXIN
2,3,7,E Tatra DESCRIBE RESULTS
Iwaoau«ao P X
Loin(1764-01-6)
EPA Form 3610-2C(Rev.2-65) PAGE V-3 CONTINUE ON PAGE V-4

•
EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
OMB No.20400086
CONTINUED FROM PAGE V-3 _ NC0004961 Riverbend 002 Approval
nesplres7-31-88 -
1.POLLUTANT 2.MARK"X' 3.EFFLUENT 4.UNITS 5.INTAKE(optional
AND CAS NO. e.ra- b. c.ao- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE C.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(It mllebls) q.ir- semi` sane (It avalNble) !If available) it available) d.NO.OF a.Concen- b.Mass 6 NO.OF
es _(1)Cancerkatlan (2)Mass (1)Cancentrafon (2)Mass (1)Cancentrafon
(2)Mass ANALYSES_ tration (1)Concentration (2)Mass ANALYSES
GC/MS FRACTION-VOLATILE COMPOUNDS
1V.Aawein X < 10 < 0.56 1 U9/I lb/Day < 10 < 11.35 1
•
(107-02-)
2V.Aaye:reti. X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(107.13-1)
3V.Beaune X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
171-432)
4V.Bis(Ct1oro.
maf,14)Eller X X X
(542-861) 1 ugn lb/Day X X 1
5v.Br motam X < 2 < 0.11 1 ug/I lb/Day < 2 < 2.27 1
(75.25-2)
6V.Carbon
Teraddortda X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
(55-23-5)
7V.Ctlorebentene X < 2 < 0.11 1 ugh lb/Day < '2 < 2.27 1
(108-90.7) •
8V.Chbrod.
warom.nane X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
(124-48-1)
9V.cNoroeoane X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
(75-00-3)
10V.2-Chloro-
etrMe yl Eller X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
(110-75-8)
11V.Chiorofonn X < 5 < 0.28 1 ug/l lb/Day < 5 '< 5.67 1
S67-86-3)
12V.ddtbro-
Ixarwmsrnns X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
S75-27-4)
13V.Oldioro.
r1ljamefw,e X < 2 < 0.11
(75-51-e 1 ugh lb/Day < 2 < 2.27 1
14V.1.1- X < 2 < 0.1'F 1 wail lb/Day -< 2 < 3 ZT 1
afore(75-34-3)
tsv.12-Dld,loro X < 2 < 0.11 1 ug/1 15/Day < 3 < -127 1
stare(107-062)
16V.t.t-Dlaiao X < 2 < 0.11 1 uy/I )b/Day < 2 < 2.27 1
elritio a(75-36.1)
17V.1,2-Dato o- X < 5 < 0.28 1 up/I Ib/Day < 5 < 5.67 1
propane(78-87-5)
18V.1,3-01wow X < 2 < 0.11
1 ug/t lb/Day < 2 < 2.27 1
propilsre(542-75-8) .
19V.Etrylentsre X < 2 '< 0.11 1 ugh lb/Day < 2 < 2.27 1
(100-41-4)
20V.Mes,i4 X < 2 < 0.11 1 ug/I lb/Day < 2 < 2.27 1
Bromide(74-83-9)
21V.M X < 2 <MUMi 0.11 1 ug l lb/Day < 2 < 2.27 1
Chloride(74-87-3)
EPA Form 3510-2C(Rev.2-85) PAGE V-4 CONTINUE ON PAGE V5

•
EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
OMB No.2040-0086 •
CONTINUED FROM PAGE V-4 NC0004961 Riverbend 002 Approve takes 731-06
1.POLLUTANT 2.MARK'X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AND CAS NO. are- me- cab- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE e.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If avalabN) air- s.nt sent (Ir sys�lsde) (n.vall ble) LONG
d.NO.OF a.Concen- b.Mass d.NO.OF
ad _ 1 Concentration I(2)Mass .131 Concentaton (2)Mass II)Concsrpelon (2)Mass ANALYSES tratlon (I)Cancentrallon (2)Mass ANALYSES
,GC/MS FRACTION-VOLATILE COMPOUNDS(continued)
22V.Methylene X < 5 < 0.28 1
uyll lb/Day < 5 < 5.67 1
cnorlde(75.09-21 _
23V.1,1.2,2-Tetra-
idaorn.t.na X < 2 < 0.11 1 LW lb/Day < 2 < 2.27 1
(7534-5)
24V.Teraa+oro- X '< 2 < 0.11 1 uy/I lb/Day < 2 < 2.27 1
et iens(127-18-4)
125V.Telw X < 2 < 0.11
na 1 ugh lb/Day < 2 < 2.27 1
(108-88-3)
26V.1,2-rang-
'Cldrioroetywr X < 2 < 0.11 1 u9/1 lb/Day < 2 < 2.27 1 i
(156-80.5)
27V.1,1.1-T6
'Magelrte X < 2 < 0.11 1 uy/I lb/Day < 2 < 2.27 1 1
S71-55-6)
128V.1,1,2-Td-
woro.ttrta X < 2 < 0.11 1 uyl lb/Day < 2 < 2.27 1
(75-00-5)
29V.Trdloro- X < 2 < 0.11 1 ugh Ib/Day < 2 < -2.27 1 1
eht4ene(79-01.6)
130V.Trtdioro-
ra+arom. .n. X t, < 2 < 0.11 1 uyl lb/Day < 2 < 2.27 1
J7s99-4)
31V.WO X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
CNafds(75-01-4)
GC/MS FRACTION-ACID COMPOUNDS
j 1A 2-Chloroptwtd X < 10 0.56 1 uy/I lb/Day < 10 < 11.35 1
(95.57-8)
'2A 2,4-dcnoro- X < TO 0.56 - 1 ugh Ili/Day < TO -< 11.35 1
\phenol(120-83-2)
3.4.Z4-0lmet* X < 10 0.56 1 uyll lb/Day < TO < T1.35 1
phenol(106.67-9)
4A 4,6-DIr/ro-O- X < 10 -636 1 uy/I lb/Day < TO < 11.35 1
Crawl(534-52-1)
'5A 2,4-OINto- X < 10 -036 1 uy/I lb/Day < TO < T1.35 1
phenol(51-28-5)
6A 2-Nlvop,end X < 10 0.56 1 uy/I lb/Day < TO '< T1.35 1
(88-75-5)
7A 4-Ntropnend - X < 10 0.56 1 ugh - lb/Day < TO '< 11.35 1
S10 -02-7)
8A PLNoro-M- X ' < 10 0.56 1 ugh) lb/Day < 10 < 11.35 1
Cresd(59-50-7)
9A.Peradioro- X < 10 0.56 1 uy/I Ib/Day < 10 < TT.35 1
phenol(87-865)
10A.Meal X < 10 0.56 1 uy/I lb/Day < TO < 11.35 1
(108-95-2) .
11A.2,4,6Td-
dsoroph.nd X < 10 0.56 1 uy/I lb/Day < 10 < 11.35 1
(88-C62)
EPA Form 3510-2C(Rev.2-85) PAGE V-5 CONTINUE ON PAGE V-0

EPA I.D.NUMBER(copy from Kern 1 or Form 1) OUTFALL NUMBER FarmApprceed
CONTINUED FROM PAGE V-5 NC0004961 Riverbend 002 AAppprro al wires 7-31-8e
11.POLLUTANT 2.MARK"X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AND CAS NO. a.r► b.pr.- cab- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE C.LONG ERM AVG.VALUE a.LONG TERM AVG.VALUE
(It evades.) qir- sdnt sett (n sraNsble) (If.wn.Db) (If ) d.NO.OF a.Concert- b.Mass a NO.OF
.d _ _ 1 Concantallan I(2)Mau 11)Concentration (_2)Mass (1)Carcer9allon (2)Mass ANALYSES tratlon (1)Concantalce (2)Mau ANALYSES
GC/MS FRACTION-BASE NEUTRAL COMPOUNDS
,18.Acerapferna A < 10 < 0.56 1 u9/I lb/Day < 10 < 11.35 1
(63-32-9)
28.Acenaphylore X < 10 < 0.56 1 u9/I Ib/Day < 10 < 11.35 1
;(208 96-8)
38.M8racana A .< 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
(120-12-7) -
48.Borman. A < 50 < 2.82 1 u9/I lb/Day < 50 < 56.73 i 1
(92-67-5) NOTE I NOTE 1
f a) X < 10 < 0.56 1 ugh) lb/Day < 10 < 11.35 1
r6B.Bereo(a) X < 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
I Py►ene(50.32.8)
78.3,4-Burro-
luory tier. X < 10 < 0.56 1 u9/I lb/Day < 10 < 11.35 1
(206-99-2)
'M.Borax(g1) X < 10 < 0.56 1 ugh Ib/Day < 10 < 11.35 1
Puylsn.(191-24-2)
96.B.ao(k)
F►or.M sns X < 10 < 0.56 1 ugh! lb/Day < 10 < 11.35 1
(207-08-9)
i 108.Bis(2-Chloro-
efwal4)Mefwr. X < 10 < 0.56 1 u9/I lb/Day < 10 < 11.35 1
5111- 1-0
11 B.Ns(2-0rioro-
(•tet 4)EEllerlle) X < 10 < 0.56 1 tg/I lb/Day < 10 < 11.35 1
128.81s(2-Chlo olso-
{p 02�0 1 X < 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
138.Bls(2-Ehyb
1 Il
X < 10 < 0.56 1 ugh lb/Day 25 28.36 1
148.4-Bronro-
X < 10 < 0.56 1 u9/I lb/Day < 10 < 11.35 1
158.Butyl Berleyl A < 10 < 0.56 1 Ka lb/Day < TO < 11.35 1
PMail.M(65-68.7)
168.2-Ctloro-
rr t*wsne X < 10 < 0.56 •
1 u911 lb/Day < 10 < 11.35 1
(91-68-7)
178.4-rioro-
petal Phwtyl X < 10 < 0.56 1 u9/1 lb/Day < 10 < 11.35 1
'Eby(7005.72-3)
,186.C rysan. X < 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
!(216.01-9)
198.Dbereo(an)
MMerecere X < 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
(53-70-3)
208.1,2-D4orioro- X < 10 < 0.56 1 u9/I lb/Day < 10 < 11.35 1
benzene(95-60-1)
218.1.3-D ctaao- A < 10 < 0.56 1 u9/I (b/Day < TO < 1 T.35 1
benzene(541-73-1) _
EPA Form 3510-2C(Rev.2-85) PAGE V-6 CONTINUE ON PAGE V-7
NOTE 1:This carnpound camel be.carately q.*n*tated using EPA method 625;reported concentrations should be regarded as epprodneao s. ,

EPA I.D.NUMBER(copy from Item 1 of Faun 1) OUTFALL NUMBER Farm Approved
0-0088
CONTINUED FROM PAGE V-6 NC0004961 Riverbend 002 AO1r1pprro i.grees7-331.88
f 1.POLLUTANT 2.MARK"X' 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
air e.prr c.a- a.MAXIMUM DAILY VALUE I b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
1-ANIiiICASt4e1;10. q�r- sMR unc (I!avau.ek) tli I (If wew•ek) {n w Sabin) a.NO.OF a.Concert- b.Mass d.No.of
W {t)Cortursr tiara (2)M•u Corkenfaeon (2)Mats (1)CortarAaton (2)Mass ANALYSES tfetion (1)Catiwrtason (2]Mau ANALYSES
GC/MS FRACTION-BASE/NEUTRAL COMPOUNDS(continued)
228.1.4-DldYoro X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
Corinne(106-46-7)
238.3,3-0>dioro-
Derekarr X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
(91-94-1)
248.Derry!
tt e X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
tryl
'25Pne,waa X < 10 < 0.56 1
(131.11-3) >1yA lb/Day < 10 < 11.35 1
268.MN-Buy
Pn is t. X < 10 < 0.56 1 uy/I Ib/Day < 10 < 11.35 1
r{64.74-2) .
278.2,4-0lrrro- X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
;toluene(121-14-2)
268.2,6•0lrtso- X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
(toluene(606-20-2)
tieieiit y
R X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
3 n• •1o1B7-t8420)
nyatn A o X < 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
benzene)(122-067)
318.Monahan* X < 10 < 0.56 1 ugA lb/Day < 10 < 11.35 1
(206-44-0)
'328.Suorema X < 10 < 0.56 1 ugA lb/Day < 10 < 11.35 1
(86-73-7)
338.Hsvact+oro- X < 10 < 0.56 1 ugA lb/Day < 10 < 11.35 1
benzene(118-74-1)
348.Net.- I
dsorodadene X < 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
(87-68-3)
358.N.tadsoro.
cyrbp.Maaens X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
368.Netadloro- X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
Mere(67-72-1)
37B.lWeno
1,2,3tC)Py�.n. X < 10 < 0.56 1 ugA lb/Day < 10 < 11.35 1
193-39�5)
388.I.opho one X < 10 < 0.56 1 ugA lb/Day < 10 < 11.35 1
(78-59-1)
398.Nepnerlene X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
(91-20 3)
408.Nitrobenzene X < 10 < 0.56 1 ugA lb/Day < 10 < 11.35 1
(98-95-3)
418.N-Nler
X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
(62-759
428.N-Nlfosoa-
N-Prool�YMrr X < 10 . < 0.56 1 ugA lb/Day < 10 < 11.35 1
5821 7)
EPA Form 3510.2C(Rev.2-85) PAGE V-7 CONTINUE ON PAGE V-6

•
EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER
formAppro`ed r
CONTINUED FROM PAGE V-7 OMB No.2040.0086
NC0004961 Riverbend 002 Approval e res7.31-88
1.POLLUTANT 2.MARK'X' 3.EFFLUENT 4.UNITS 5.INTAKE(optional)AND CAS NO. a.rr b cab- a.MAXIMUM eDAILY VALUE b.MAXIMUM DAY VALUE C.LONGTERM AVG.VALUE
(R ova ebb) soot pi
((If ►Q �) 0.NO.OF a.Concen- b.Mass a.LONG TERM AVG.VALUE
el (1)Cancen afar d NO.Of
(2)Mass (1)Concanaesan (2)Maas (1)Cancwrfslon (2)Mass ANALYSES tration {t)CcncerRefan (2)Mass ANALYSES
GC/MS FRACTION-BASE/NEUTRAL COMPOUNDS(continued)
438.N-Nlsr
soaps rtxM X <
(��) 10 < 0,56 1 ug/I lb/Day < 10 < 11.35 1
44B.Phenarmrens X < 10 <
(65-01-8) 0 56 1 uy/I lb/Day < 10 < 11.35 1
'458.Pyrene X < 10 < 0.56 1
(12a034
) t1y/I lb/Clay < 10 < 11.35 1
488.1,2,4-TA-
'rrwoeerYena X <
10 < 0,56 1 up/l lb/Day < 10 < 11.35 1
(12082-1)
GC/MS FRACTION-PESTICIDES
1 P.Alain X
(309-00.2)
2P.aOha-811C X
(319-84-6)
3P.b. -8I$C X
•
(315-8'5-7)
'4P.gamma-BHC X
(58-89-9) •
5P.deea-BNC X '
(319-86-8)
6P.Citation* X
J57-74-9)
7P.4,4'-DOT X
(50.29.3)
8P.4,4'-DOE X
(72-55-9)
9P.4,4'-D00 X
(72-54-8)
10P.Dleldrkr X
(60.57-1)
11P.abfe-Endoglfan X
(115-29-7)
12P.beta-ErgoaOen X - .
(115-29-7) .
13P.Endoaien
Sulfate X
(1031-07-8)
'
14P.EndIn X
(72-20.8)
15P.Endrin
Aldehyde X
(7421.93-4)
16P.NephWor X
(76-44-8)
EPA Form 3510-2C(Rev.2-05) PAGE V-8
CONTINUE ON PAGE V-9

•
•
EPA I.D.NUMBER(copy from Ilefn 1 of Form 1) OUTFALL NUMBER Form Approved
OMB No.2040-0086
CONTINUED FROM PAGE V-8 NC0004961 Riverbend 002 45(0v4104aes7-31-88
1.POLLUTANT 2.MARK"X' 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
ANp CA NO. an- e. cab- a. IM DAILY VALUE b.M/�CIMUIu130 DAY VALUE c.LOG M AVG.VALUE a.LONG TERM AVG.VALUE
(Qi ) ' aantt ) f" weds) a No.of a.Conan- b.Mass a.No.OF
s0 1 ConcmMtitlon 1(2)Mass CO Concentration 12)Mass (1)Concsntalon (2)Matt ANALYSES tration (1)Concerrtalan �2 Mass ANALYSES
'GC/MS FRACTION-PESTI
17P.Heptachlor
EPA X
(1024-57-31
18P.PCB-1242 X
(53469-21-9)
19P.PCB•1254 X
(11097.69-1)
20P.PCB-1221 X
S 11104-28-2)
21P.PCB-1232 X
(11141-165)
22P.PC61248 X
(12672-29-6)
23P.PCB-1260 X
(11096 82-5)
24P.PCB-1016 X
,(12674-1 1-2)
25P.Toxepfw» X
J(8001-35.2)
EPA Form 3510-2C(Rev.2-85) PAGE KY

' 4 I-
Permit No. NC0004961
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1,
other lawful standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
Duke Power Company
is hereby authorized to discharge wastewater from a facility located at
Riverbend Steam Station
Mount Holly
Gaston County
to receiving waters designated as the Catawba River in the Catawba River Basin
in accordance with effluent limitations,monitoring requirements,and other conditions set forth in
Parts I, II, and III hereof.
This permit shall become effective
This permit and the authorization to discharge shall expire at midnight on November 30, 1994
Signed this day
hV 11Z0-1LAZ' N
�A NAO A. Preston Howar'-,Jr„`P.E., Director
nvironthental
ement
pq 9 �1 Division
E of thee Environmental Management Commission
!� 14 By Authorityg
1

•
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 Riverbend Steam Station, ,Mount
Holly, Gaston County (See Part III of this Permit), and
I I
2. Discharge from said treatment works at the location specified on the attached map into the
Catawba River which is classified Class WS-IV and B waters in the Catawba River Basin.

3Oi 000"I.E 602 •
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t
A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS -FINAL Permit 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 serial number 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/day Units (Specify) Measurement Sample *Sample
Mon. Avq.Daily Max. Moil. Avg. Daily Max. Frequency Type Location
Flow Daily Pump Logs U or E
Temperature C (F) 35 (95) Daily Grab E
Temperature C (F) ** 32 (89.6) Daily * * D
Temperature *** Daily * * * U, E
* Sample Locations: E-Effluent,U-intake,D-Downstream at Mountain Island Lake Dam.
** In no case should the ambient temperature exceed 32.0°C (89.6°F). When the Riverbend Station effluent temperature is recorded
below 32.0°C (89.6°F),then reporting of the downstream water temperature is not required. The ambient temperature shall be defined
as the daily average downstream water temperature.
***The temperature of the effluent shall be such as not to exceed two times the intake temperature(°F)minus 23 °F when the daily average
intake temperature ranges from 0°C(32.0°F)to 12.8°C(55°F), and in no case cause the ambient temperature to exceed 32°C (89.6°F).
Except when multiple units operated by the same control system are utilized without operating additional units,the temperature of the
effluent shall not exceed 10°C(50°F) when the daily average intake temperature is less than or equal to 2.5°C (36.5°F).
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 prior to commencing chlorination.
The Regional Administrator has determined prusuant 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 shell fish,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.

f
r
A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS-FINAL Permit 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 serial number 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 Units (Specify) Measurement Sample *Sample
Mon. Avq.Daily Max. Mon. Avg. Daily Max. Frequency Type Location
Flow Weekly Pump Logs or E
Similar readings
Total Suspended Solids**** 23.0 mg/I 75.0 mg/I 2/month Grab E
Oil and Grease 11.0 mg/I 15.0 mg/I 2/month Grab E
Total Copper 1.0 mg/I 1.0 mg/I 2/month Grab E
Total Iron 1.0 mg/I 1.0 mg/I 2/month Grab E
Total Arsenic 480.0 µg/I 2/month Grab E
Total Selenium Monthly Grab E
Total Nitrogen (NO2 + NO3 + TKN) Monthly Grab E
Total Phosphorus Monthly Grab E
Chronic Toxicity** Quarterly Grab E
Pollutant Analysis *** Annually E
*Sample Locations: E- Effluent
Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with an other waste stream.
** Chronic Toxicity(Ceriodaphnia) P/F at 10%;January, April,July, October; See Part III,Condition O.
*** See Part III,Condition R.
**** Monthly average of 43 mg/1 is permitted provided that the Permittee can satisfactorily demonstrate the the difference between
23 mg/1 and 43 mg/1 is due to the concentration of total suspended solids in the intake water.
The metal cleaning waste,coal pile runoff,ash transport water,domestic wastewater, and low volume waste shall be discharged into I
the ash settling pond.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 2/month at the effluent by
grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

.1 •
•
•
E. Toxicity Reopener Condition
This permit shall be modified, or revoked and reissued to incorporate toxicity limitations
and monitoring requirements in the event toxicity testing or other studies conducted on
the effluent or receiving stream indicate that detrimental effects may be expected in the
receiving stream as a result of this discharge.
F. 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.
G. There shall be no discharge of polychlorinated byphenyl compounds such as those
commonly used for transformer fluid.
H. Biocide Condition
The permittee shall not use any biocides except those approved in conjunction with the
permit application. The permittee shall notify the Director in writing not later than ninety
(90) days prior to instituting use of any additional biocide used in cooling systems which
may be toxic to aquatic life other than those previously reported to the Division of
Environmental Management. Such notification shall include completion of Biocide
Worksheet Form 101 and a map locating the discharge point and receiving stream.
I. Continued intake screen backwash discharge, transformer cooling water and
combustion turbine cooling water discharges are 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. 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.
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.

•
O. CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
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 *September 1989) or subsequent
versions.
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 the effective date of this permit during the months
of January, April, July and October. Effluent sampling for this testing shall be performed
at the NPDES permitted final effluent discharge below all treatment processes.
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:
Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical
measurements performed in association with the toxicity tests, as well as all
dose/response data. Total residual chlorine of the effluent toxicity sample must be
measured and reported if chlorine is employed for disinfection of the waste stream.
Should 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.
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 extent caused be operational error, improperly designed treatment

4
•
facilities, inadequate treatment facilities, lack of preventive maintenance, or improper
operations.
Q. 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.
R. Pollutant Analysis Condition
The permittee shall conduct a test for 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 Monitoring (APAM)
Requirement Reporting Form A and accompanying memo, 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'Monitoring
Requirement" (APAM).
(2) Other significant levels of organic chemicals must be identified and approximately
quantified. For the purpose of implementing this requirement, the largest 10 GC/MS
peaks in the purgeable base/neutral extractable, and acid extractable fractions (or fewer
than 10, if less than 10 unidentified peaks occur) for chemicals other than those specified
on the APA Requirement Reporting Form A should be identified and approximately
quantified as stated in the APAM Reporting Form A instructions. This part(item 2) of
the APAM requirement is to be referred to as the "10 significant peaks rule").
S. Beginning on the effective date of this permit and lasting until expiration, there shall
be no discharge of plants wastes to the ash pond unless the permittee provides and
maintains at all times a minimum free water volume (between the top of the sediment
level and the minimum discharge elevation) equivalent to the sum of the maximum 24-
hour plant discharges plus all direct rainfall and all runoff flows to the pond resulting
from a 10-year, 24-hour rainfall event, when using a runoff coefficient of 1.0. During the
term of the permit,the permittee shall remove settled material from the ponds or
otherwise enlarge the available storage capacities in order to maintain the required
minimum volumes at all times. No later that 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 fro the following year. Present
information indicates a needed volume of 95.36 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.

•
T. It has been demonstrated that under certain conditions it is possible to reduce the
concentration of metals in boiler cleaning wastes in the range of 92 to 99+percent by
treatment in ash ponds. Because of dilution problems, and the existence of boundary
interface layers at the extremities of the plume, it is difficult to prove beyond doubt that
the quantity of iron and copper discharged will always be less than one milligram per liter
times the flow of metal cleaning when treated in this manner.
The application of physical/chemical methods of treating wastes has also been
demonstrated to be effective in the treatment of metal cleaning wastes. However, the
effectiveness of ash pond treatment should be considered in relation to the small
differences in effluent quality realized between the two methods.
It has been demonstrated 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 prior to metal cleaning waste addition.
4. Four days retention time in ash pond with effluent stopped.
5. Boiler volume less than 86,000 gallons.
6. Chemicals for cleaning to include only one or more of the following:
a. Copper removal step- sodium bromate, NaBrO; ammonium carbonate,
(NH)CO; and ammonium hydroxide, NHOH.
b. Iron removal step-hydrochloric acid, HC1; and ammonium bifluoride, (NH)BF
and proprietary inhibitors.
7. Maximum dilution of wastes before entering ash pond 6 to 1.
8. After treatment of metal cleaning wastes, if monitoring of basin effluents as required
by the permit reveals discharges outside the limits of the permit. 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.
U. Discharge of any waste resulting from the combustion of toxic or hazardous waste to
any waste stream which ultimately discharges to waters of the United States is prohibited,
unless specifically authorized in this permit.
V. The Permittee shall report all visible discharges of floating materials,such as, an oil
sheen to the Director when submitting DMR's.
W. The permittee shall check the diked areas for leaks by a visible inspection and shall
report any seepage detected.

`),.$
, \ �\ DIVISION OF ENVIRONMENTAL MANAGEMENT
July 13, 1994
rn
a DEPT. 00
'NVIRONMENT, HEALTH,
MEMORANDUM fe NATURAL RESOURC:T 5
TO: Dave Goodrich JUL 18 199A
THROUGH: Matt Matthews r''
BIVLJU BF E11RYUE iAt MAKAGEMEN1
FROM: Kristie Robeson UCIESnLE KM/ WIDE
SUBJECT: Permit Modification
Duke Power Co.-Riverhend Steam Station
NPDES Permit No. NC0004961
Gaston County
By cover letter dated July 11, 1994, the facility was issued NPDES Permit No.
NC0004961with an effective date of August 1, 1994, and expiration date of July 31, 1996.
Upon review of the toxicity language contained in the permit, it was noted that the permit
does not reflect the new permitting strategy, effective October 1991, which eliminates all
references to two consecutive toxicity tests. Under Part III, Condition 0, the following
language is present- "The effluent discharge shall at no time exhibit chronic toxicity in any
two consecutive toxicity tests, using procedures outlined in...:" This office recommends
modification of the permit to incorporate language in Part III, Condition 0 to read, "The
effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined
in:"
I appreciate your assistance to review the recommended change and undertake any
necessary steps to modify the existing permit. Should you have any questions, please feel
free to contact me at 2136.
cc: Steve Tedder
Larry usley
Central Files
fro.

State of North Carolina
Department of Environment,
Health and Natural Resources wi • A
Division of Environmental Management ,,
James B. Hunt, Jr., Governor ti
1 C
Jonathan B. Howes, Secretary 1E) G N .
4(‘ A. Preston Howard, Jr., P.E., Director N.C. D' E
ENVIRONMENT, HEALTH,
& NATURAL RESOURCES
July 11, 1994 JuL 14 1994
John S. Carter DIVISION OF ENVIRONMENTAL L'ANAGE;AEN1
PO Box 367 MOORESVILLE REGIONAL OFFICE
Mount Holly, North Carolina 28120
Subject: Permit No. NC0004961
Duke Power Co., Rlverbend
Gaston County
Dear Mr. Carter:
In accordance with your application for discharge permit received on August 26, 1993,
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 have the right to an adjudicatory hearing upon written request
within thirty (30) days following receipt of this letter. This request must be in the form of a
written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings, Post Office Drawer 27447, Raleigh, North
Carolina 27611 -7447. Unless such demand is made, this decision shall be final and binding.
Please take notice this permit is not transferable. Part II, E.4. addresses the requirements
to be followed in case of change in ownership or control of this discharge.
This permit does not affect the legal requirements to obtain other permits which may be
required by the Division of Environmental 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 Dana Bolden at
telephone number 919/733-5083.
Sincerely,
Original Sined By
David A. Goodrich
A. Preston Howard, Jr., P.E.
cc: Mr. Jim Patrick, EPA
Altftrestrille ItegionalOffice
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10%post-consumer paper

Permit No. NC0004961
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCCR DEFT. of
DIVISION OF ENVIRONMENTAL MANAGEMENT ENVIRONMENT, HEALTH,
& NATURAL RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE JUL 14 1994
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM.
ofvraION OF ENVIRONMENTAL MANAGEMENT
MOORESVILLE REGIONAL OFFICE
In compliance with the provision of North Carolina General Statute 143-215.1,
other lawful standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
Duke Power Company
is hereby authorized to discharge wastewater from a facility located at
Riverbend Steam Station
Mount Holly
Gaston County
to receiving waters designated as the Catawba River in the Catawba River Basin
in accordance with effluent limitations,monitoring requirements, and other conditions set forth in
Parts I, II, and III hereof.
This permit shall become effective August 1, 1994
This permit and the authorization to discharge shall expire at midnight on July 31, 1996
Signed this day July 11, 1994
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E., Director
Division of Environmental Management
By Authority of the Environmental Management Commission

pF
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 Riverbend Steam Station, ,Mount
Holly, Gaston County (See Part III of this Permit), and
I I
2. Discharge from said treatment works at the location specified on the attached map into the
Catawba River which is classified Class WS-IV and B waters in the Catawba River Basin.

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A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit 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 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics Discharge Limitations Monitoring Requirements
Lbs/day Units (specify) Measurement Sample *Sample
Mon. Avg. Daily MaX Mon. Avg. Daily Max. Frequency Type Location
Flow Daily Pump Logs E
Temperature Degrees C (F) 35(95) Daily Grab E
Temperature** Daily * * U,D
* Sample locations: 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 degrees Celsius(5 degrees F),herein after referred to as the Delta T, and in no case cause the ambient water
temperature to exceed 32 degrees Celsisus(89.6 degrees F). The Delta T shall be the difference between the daily average upstream
temperatue and the daily average downstream water temperature. The ambient water temperature shall be defined as the daily average
downstream water temperature.
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. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS -FINAL Permit 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 serial number 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 Units (Specify) Measurement Sample *Sample
Mon. Avg.Daily Max. Mon. Avg.. Daily Max. Frequency Type Location
Flow Weekly Pump Logs or E
Similar readings
Total Suspended Solids**** 23.0 mg/I 75.0 mg/I 2/month Grab E
Oil and Grease 11.0 mg/I 15.0 mg/I 2/month Grab E
Total Copper 1Th mg/I 1.0 mg/I 2/month Grab E
Total Iron 1.0 mg/I 1.0 mg/I 2/month Grab E
Total Arsenic 480.0 µg/I 2/month Grab E
Total Selenium Monthly Grab E
Total Nitrogen (NO2 + NO3 +TKN) Monthly Grab E
Total Phosphorus Monthly Grab E
Chronic Toxicity** Quarterly Grab E
Pollutant Analysis *** Annually E
* Sample Locations: E- Effluent
Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with an other waste stream.
** Chronic Toxicity (Ceriodaphnia) P/F at 10%;January, April,July, October; See Part III,Condition O.
*** See Part III,Condition R.
**** Monthly average of 43 mg/1 is permitted provided that the Permittee can satisfactorily demonstrate the the difference between
23 mg/1 and 43 mg/1 is due to the concentration of total suspended solids in the intake water.
The metal cleaning waste,coal pile runoff,ash transport water,domestic wastewater, and low volume waste shall be discharged into o
the ash settling pond.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 2/month at the effluent by
grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

PART I
Section B. Schedule of Compliance
1. The permittee shall comply with Final Effluent Limitations specified for discharges in
accordance with the following schedule:
• Permittee shall comply with Final Effluent Limitations by the effective date of the permit unless
specified below.
2. Permittee shall at all times provide the operation and maintenance necessary to operate the
existing facilities at optimum efficiency.
3. 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 schedule requirements.

Part II
Page 1 of 14
PART II
STANDARD CONDITIONS FOR NPDES PERMITS
SECTION A. DEFINITIONS
1. Permit Issuing Authority
The Director of the Division of Environmental Management.
2. DEM or Division
Means the Division of Environmental Management, Department of Environment, Health and
Natural Resources.
3. E1C
Used herein means the North Carolina Environmental Management Commission.
4. Act or "the Act"
The Federal Water Pollution Control Act, also known as the Clean Water Act, as amended. 33
CSC 1251, et. seq.
5. Mass/Day Measurements
a. The "monthly average discharge" is defined as the total mass of all daily discharges
sampled and;'or measured during a calendar month on which daily discharges are sampled
and measured, divided by the number of daily discharges sampled and/or measured during
such month. It is therefore, an arithmetic mean found by adding the weights of the
pollutant found each day of the month and then dividing this sum by the number of days
the tests were reported. The limitation is identified as "Monthly Average" in Part I of the
permit.
b. The "weekly average discharge" is defined as the total mass of all daily discharges sampled
and/or measured during the calendar week (Sunday - Saturday) on which daily discharges
are sampled and measured, divided by the number of daily discharges sampled and/or
measured during such week. It is, therefore, an arithmetic mean found by adding the
weights of pollutants found each day of the week and then dividing this sum by the
number of days the tests were reported. This limitation is identified as "Weekly Average"
in Part I of the permit.
c. The "maximum daily discharge" is the total mass (weight) of a pollutant discharged during
a calendar day. If only one sample is taken during any calendar day the weight of pollutant
calculated from it is the "maximum daily discharge." This limitation is identified as "Daily
Maximum," in Part I of the permit.
d. The "average annual discharge" is defined as the total mass of all daily discharges sampled
and/or measured during the calendar year on which daily discharges are sampled and
measured, divided by the number of daily discharges sampled and/or measured during such
year. It is, therefore, an arithmetic mean found by adding the weights of pollutants found
each day of the year and then dividing this sum by the number of days the tests were
reported. This limitation is defined as "Annual Average" in Part I of the permit.

• Part II
Page 2 of 14
6. Concentration Measurement
a. The "average monthly concentration," other than for fecal coliform bacteria, is the sum of
the concentrations of all daily discharges sampled and/or measured during a calendar month
on which daily discharges are sampled and measured, divided by the number of daily
discharges sampled and/or measured during such month (arithmetic mean of the daily
concentration values). The daily concentration value is equal to the concentration of a
composite sample or in the case of grab samples is the arithmetic mean (weighted by flow
value) of all the samples collected during that calendar day. The average monthly count for
fecal coliform bacteria is the geometric mean of the counts for samples collected during a
calendar month. This limitation is identified as "Monthly Average" under"Other Limits" in
Part I of the permit.
b. The "average weekly concentration," other than for fecal coliform bacteria, is the sum of the
concentrations of all daily discharges sampled and/or measured during a calendar week
(Sunday/Saturday) on which daily discharges are sampled and measured divided by the
number of daily discharges sampled and/or measured during such week (arithmetic mean of
the daily concentration values). The daily concentration value is equal to the concentration
of a composite sample or in the case of grab samples is the arithmetic mean (weighted by
flow value) of all the samples collected during that calendar day. The average weekly count
for fecal coliform bacteria is the geometric mean of the counts for samples collected during
a calendar week. This limitation is identified as "Weekly Average" under"Other Limits" in
Part I of the permit.
c. The "maximum daily concentration" is the concentration of a pollutant discharge during a
calendar day. If only one sample is taken during any calendar day the concentration of
pollutant calculated from it is the "Maximum Daily Concentration". It is identified as
"Daily Maximum" under "Other Limits" in Part I of the permit.
d. The "average annual concentration," other than for fecal coliform bacteria, is the sum of the
concentrations of all daily discharges sampled and/or measured during a calendar year on
which daily discharges are sampled and measured divided by the number of daily
discharges sampled and/or measured during such year (arithmetic mean of the daily
concentration values). The daily concentration value is equal to the concentration of a
composite sample or in the case of grab samples is the arithmetic mean (weighted by flow
value) of all the samples collected during that calendar day . The average yearly count for
fecal coliform bacteria is the geometric mean of the counts for samples collected during a
calendar year. This limitation is identified as "Annual Average" under "Other Limits" in
Part I of the permit.
e. The "daily average concentration" (for dissolved oxygen) is the minimum allowable amount
of dissolved oxygen required to be available in the effluent prior to discharge averaged
over a calendar day. If only one dissolved oxygen sample is taken over a calendar day, the
sample is considered to be the "daily average concentration" for the discharge. It is
identified as "daily average" in the text of Part I.
f. The "quarterly average concentration" is the average of all samples taken over a calendar
quarter. It is identified as "Quarterly Average Limitation" in the text of Part I of the permit.
g. A calendar quarter is defined as one of the following distinct periods: January through
March, April through June, July through September, and October through December.

Part II
Page 3 of 14
7. Other Measurements
a. Flow. (MGD): The flow limit expressed in this permit is the 24 hours average flow,
averaged monthly. It is determined as the arithmetic mean of the total daily flows recorded
during the calendar month.
b. An "instantaneous flow measurement" is a measure of flow taken at the time of sampling,
when both the sample and flow will be representative of the total discharge.
c. A "continuous flow measurement" is a measure of discharge flow from the facility which
occurs continually without interruption throughout the operating hours of the facility. Flow
shall be monitored continually except for the infrequent times when there may be no flow
or for infrequent maintenance activities on the flow device.
8. Types of Samples
a. Composite Sample: A composite sample shall consist of:
(1) a series of grab samples collected at equal time intervals over a 24 hour period of
discharge and combined proportional to the rate of flow measured at the time of
individual sample collection, or
(2) a series of grab samples of equal volume collected over a 24 hour period with the time
intervals between samples determined by a preset number of gallons passing the
sampling point. Flow measurement between sample intervals shall be determined by
use of a flow recorder and totalizer, and the present gallon interval between sample
collection fixed at no greater than 1/24 of the expected total daily flow at the treatment
system, or
(3) a single, continuous sample collected over a 24 hour period proportional to the rate of
flow.
In accordance with (1) above, the time interval between influent grab samples shall be no
greater than once per hour, and the time interval between effluent grab samples shall be no
greater than once per hour except at wastewater treatment systems having a detention time
of greater than 24 hours. In such cases, effluent grab samples may be collected at time
intervals evenly spaced over the 24 hour period which are equal in number of hours to the
detention time of the system in number of days. However, in no case may the time interval
between effluent grab samples be greater than six (6) hours nor the number of samples less
than four(4) during a 24 hour sampling period.
b. Grab Sample: Grab samples are individual samples collected over a period of time not
exceeding 15 minutes; the grab sample can be taken manually. Grab samples must be
representative of the discharge or the receiving waters.
9. Calculation of Means •
a Arithmetic Mean: The arithmetic mean of any set of values is the summation of the
individual values divided by the number of individual values.
b. 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).

Part II
Page 4 of 14
c. Weighted by Flow Value: Weighted by flow value means the summation of each
concentration times its respective flow divided by the summation of the respective flows.
10. Calendar Dav
A calendar day is defined as the period from midnight of one day until midnight of the next
day. However, for purposes of this permit, any consecutive 24-hour period that reasonably
represents the calendar day may be used for sampling.
11. Hazardous Substance
A hazardous substance means any substance designated under 40 CFR Part 116 pursuant to
Section 311 of the Clean Water Act.
12. Toxic Pollutant
A toxic pollutant is any pollutant listed as toxic under Section 307(a)(1) of the Clean Water Act.
SECTION B. GENERAL CONDITIONS
1. Duty to Comply
The permittee must comply with all conditions of this permit. Any permit noncompliance
constitutes a violation of the Clean Water Act and is grounds for enforcement action; for permit
termination, revocation and reissuance, or modification; or denial of a permit renewal
application.
a. The permittee shall comply with effluent standards or prohibitions established under
section 307(a) of the Clean Water Act for toxic pollutants and with standards for sewage
sludge use or disposal established under section 405(d) of the Clean Water Act within the
time provided in the regulations that establish these standards or prohibitions or standards
for sewage sludge use or disposal, even if the permit has not yet been modified to
incorporate the requirement.
b. The Clean Water Act provides that any person who violates a permit condition is subject to
a civil penalty not to exceed S25,000 per day for each violation. Any person who
negligently violates anv permit condition is subject to criminal penalties of S2,500 to
S25,000 per day of violation, or imprisonment for not more than 1 year, or both. Any
person who knowingly violates permit conditions is subject to criminal penalties of$5,000
to S50,000 per day of violation, or imprisonment for not more than 3 years, or both. Also,
any person who violates a permit condition may be assessed an administrative penalty not
to exceed $10,000 per violation with the maximum amount not to exceed $125,000. [Ref:
Section 309 of the Federal Act 33 U.S.C. 1319 and 40 CFR 122.41 (a)]
c. Under state law, a civil penalty of not more than ten thousand dollars ($10,000) per
violation may be assessed against any person who violates or fails to act in accordance with
the terms, conditions, or requirements of a permit. [Ref: North Carolina General Statutes
§ 143-215.6A]
d. Any person may be assessed an administrative penalty by the Administrator for violating
section 301, 302, 306, 307, 308, 318, or 405 of the Act, or any permit condition or
limitation implementing any of such sections in a permit issued under section 402 of the
Act. Administrative penalties for Class I violations are not to exceed $10,000 per violation,
with the maximum amount of any Class I penalty assessed not to exceed $25,000.

Part II
Page 5 of 14 •
Penalties for Class II violations are not to exceed S10,000 per day for each day during
which the violation continues, with the maximum amount of any Class II penalty not to
exceed S125,000.
2. Duty to Mitigate
The permittee shall take all reasonable steps to minimize or prevent any discharge or sludge use
or disposal in violation of this permit which has a reasonable likelihood of adversely affecting
human health or the environment.
3. Civil and Criminal Liability
Except as provided in permit conditions on "Bypassing" (Part II, C-4) and "Power Failures"
(Part II, C-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.
4. 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 USG 1321.
Furthermore, the permittee is responsible for consequential damages, such as fish kills. even
though the responsibility for effective compliance may be temporarily suspended.
5. Propem. 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.
6. 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.
7. 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 circumstances, is held invalid,the application
of such provision to other circumstances, and the remainder of this permit, shall not be affected
thereby.
8. Duty to Provide Information
The permittee shall furnish to the Permit Issuing Authority, within a reasonable time, any
information which the Permit Issuing Authority may request to determine whether cause exists
for modifying. revoking and reissuing, or terminating this permit or to determine compliance
with this permit. The permittee shall also furnish to the Permit Issuing Authority upon
request. copies of records required to be kept by this permit.

•
Part II
Page 6 of 14
9. Duty to Reapply
If the permittee wishes to continue an activity regulated by this permit after the expiration date
of this permit, the permittee must apply for and obtain a new permit.
10. expiration of Permit
The permittee is not authorized to discharge after the expiration date. In order to receive
automatic 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 permittee that has not requested renewal at least
180 days prior to expiration. or any permittee that does not have a permit after the expiration
and has not requested renewal at least 180 days prior to expiration, will subject the permittee to
enforcement procedures as provided in NCGS 143-215.6 and 33 USC 1251 et. seq.
11. Signatory Requirements
All applications, reports, or information submitted to the Permit Issuing Authority shall be
signed and certified.
a. All permit applications shall be signed as follows:
(1) For a corporation: by a responsible corporate officer. For the purpose of this Section,
a responsible corporate officer means: (a) a president, secretary, treasurer or vice
president of the corporation in charge of a principal business function, or any other
person who performs similar policy or decision making functions for the corporation,
or (b) the manager of one or more manufacturing production or operating facilities
employing more than 250 persons or having gross annual sales or expenditures
exceeding 25 million (in second quarter 1980 dollars), if authority to sign documents
has been assigned or delegated to the manager in accordance with corporate procedures.
(2) For a partnership or sole proprietorship: by a general partner or the proprietor,
respectively; or
(3) For a municipality, State, Federal, or other public agency: by either a principal
executive officer or ranking elected official.
b. All reports required by the permit and other information requested by the Permit Issuing
Authority shall be signed by a person described above or by a duly authorized
representative of that person. A person is a duly authorized representative only if:
(1) The authorization is made in writing by a person described above;
(2) The authorization specified either an individual or a position having responsibility for
the overall operation of the regulated facility or activity, such as the position of plant
manager, operator of a well or well field, superintendent, a position of equivalent
responsibility, or an individual or position having overall responsibility for
environmental matters for the company. (A duly authorized representative may thus be
either a named individual or any individual occupying a named position.); and
(3) The written authorization is submitted to the Permit Issuing Authority.

Part II
Page 7 of 14
c. Certification. Any person signing a document under paragraphs a. or b. of this section
shall make the following certification:
"I certify, under penalty of law,that this document and all attachments were prepared under
my direction or supervision in accordance with a system designed to assure that qualified
personnel properly gather and evaluate the information submitted. Based on my inquiry of
the person or persons who manage the system, or those persons directly responsible for
gathering the information, the information submitted is, to the best of my knowledge and
belief, true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fines and imprisonment for
knowing violations."
12. Permit Actions
This permit may be modified, revoked and reissued, or terminated for cause. The filing of a
request by the permittee for a permit modification, revocation and reissuance, or termination, •
or a notification of planned changes or anticipated noncompliance does not stay any permit
condition.
13. Permit Modification. Revocation and Reissuance. or Termination
The issuance of this permit does not prohibit the permit issuing authority from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit as allowed
by the laws, rules, and regulations contained in Title 40, Code of Federal Regulations, Parts
122 and 123; Title 15A of the North Carolina Administrative Code, Subchapter 2H .0100; and
North Carolina General Statute 143-215.1 et. al.
14. Previous Permits
All previous National Pollutant Discharge Elimination System Permits issued to this facility,
whether for operation or discharge, are hereby revoked by issuance of this permit. [The
exclusive authority to operate this facility arises under this permit. The authority to operate the
facility under previously issued permits bearing this number is no longer effective. J The
conditions, requirements, terms, and provisions of this permit authorizing discharge under the
National Pollutant Discharge Elimination System govern discharges from this facility.
SECTION C. OPERATION AND MAINTENANCE OF POLLUTION CONTROLS
1. Certified Operator
Pursuant to Chapter 90A-44 of North Carolina General Statutes, and upon classification of the
facility by the Certification Commission, the permittee shall employ a certified wastewater
treatment plant operator in responsible charge (ORC) 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 by the Certification Commission.
The permittee must also employ a certified back-up operator of the appropriate type and any
grade to comply with the conditions of Title 15A, Chapter 8A .0202. The ORC of the facility
must visit each Class I facility at least weekly and each Class II, III, and IV facility at least
daily, excluding weekends and holidays, and must properly manage and document daily
operation and maintenance of the facility and must comply with all other conditions of Title
15A, Chapter 8A .0202. Once the facility is classified, the permittee shall submit a letter to the
Certification Commission which designates the operator in responsible charge within thirty
days after the wastewater treatment facilities are 50% complete.

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2. Proper Operation and Maintenance
The permittee shall at all times properly operate and maintain all facilities and systems of
treatment and control (and related appurtenances) which are installed or used by the permittee to
achieve compliance with the conditions of this permit. Proper operation and maintenance also
includes adequate laboratory controls and appropriate quality assurance procedures. This
provision requires the operation of back-up or auxiliary facilities or similar systems which are
installed by a permittee only when the operation is necessary to achieve compliance with the
conditions of the permit.
3. Need to Halt or Reduce not a Defense
It shall not be a defense for a permittee in an enforcement action that it would have been
necessary to halt or reduce the permitted activity in order to maintain compliance with the
condition of this permit.
4. Bypassing of Treatment Facilities
a. Definitions
(I) "Bypass means the known diversion of waste streams from any portion of a treatment
facility including the collection system. which is not a designed or established or
operating mode for the facility.
(2) "Severe property damage" means substantial physical damage to property, damage to
the treatment facilities which causes them to become inoperable, or substantial and
permanent loss of natural resources which can reasonably be expected to occur in the
absence of a bypass. Severe property damage does not mean economic loss caused by
delays in production.
b. Bypass not exceeding limitations.
The permittee may allow any bypass to occur which does not cause effluent limitations to
be exceeded, but only if it also is for essential maintenance to assure efficient operation.
These bypasses are not subject to the provisions of Paragraphs c. and d. of this section.
c. Notice
(I) Anticipated bypass. If the permittee knows in advance of the need for a bypass, it
shall submit prior notice, if possible at least ten days before the date of the bypass;
including an evaluation of the anticipated quality and affect of the bypass.
(2) Unanticipated bypass. The permittee shall submit notice of an unanticipated bypass as
required in Part II, E. 6. of this permit. (24 hour notice).
d. Prohibition of Bypass
(I) Bypass is prohibited and the Permit Issuing Authority may take enforcement action
against a permittee for bypass, unless:
(A) Bypass was unavoidable to prevent loss of life, personal injury or severe property
damage;
(B) There were no feasible alternatives to the bypass, such as the use of auxiliary
treatment facilities, retention of untreated wastes or maintenance during normal

•
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Page 9 of 14
periods of equipment downtime. This condition is not satisfied if adequate backup
equipment should have been installed in the exercise of reasonable engineering
judgment to prevent a bypass which occurred during normal periods of equipment
downtime or preventive maintenance;and
(C) The permittee submitted notices as required under Paragraph c. of this section.
(2) The Permit Issuing Authority may approve an anticipated bypass, after considering its
adverse affects, if the Permit Issuing Authority determines that it will meet the three
conditions listed above in Paragraph d. (1) of this section.
5. Upsets
a. Definition.
"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
operation.
b. Effect of an upset.
An upset constitutes an affirmative defense to an action brought for noncompliance with
such technology based permit effluent limitations if the requirements of paragraph c. of this
condition are met. No determination made during administrative review of claims that
noncompliance was caused by upset, and before an action for noncompliance, is final
administrative action subject to judicial review.
c. Conditions necessary for a demonstration of upset.
A permittee who wishes to establish the affirmative defense of upset shall demonstrate,
through properly signed, contemporaneous operating logs, or other relevant evidence that:
(1) An upset occurred and that the permittee can identify the cause(s) of the upset;
(2) The permittee facility was at the time being properly operated; and
(3) The permittee submitted notice of the upset as required in Part II, E. 6. (b) (B) of this
permit.
(4) The permittee complied with any remedial measures required under Part II, B. 2. of this
permit.
•
d. Burden of proof.
In any enforcement proceeding the permittee seeking to establish the occurrence of an upset
has the burden of proof.
6. Removed Substances
Solids, sludges, filter backwash, or other pollutants removed in the course of treatment or
control of wastewaters shall be utilized/disposed of in accordance with NCGS 143-215.1 and 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. The permittee shall comply with all existing federal

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regulations governing the disposal of sewage sludge. Upon promulgation of 40 CFR Part 503,
any permit issued by the Permit Issuing Authority for the utilization/disposal of sludge may be
reopened and modified, or revoked and reissued, to incorporate applicable requirements at 40
CFR Part 503. The permittee shall comply with applicable 40 CFR Part 503 Standards for the
Use and Disposal of Sewage Sludge (when promulgated) within the time provided in the
regulation, even if the permit is not modified to incorporate the requirement. The permittee.
shall notify the Permit Issuing Authority of any significant change in its sludge use or disposal
practices.
7. Power Failures
The permittee is responsible for maintaining adequate safeguards as required by DEM
Regulation, Title 15A, North Carolina Administrative Code, Subchapter 2H, .0124 Reliability,
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.
SECTION D. MONITORING AND RECORDS
1. Representative Sampling
Samples collected and measurements taken, as required herein, shall be characteristic of the
volume and nature of the permitted discharge. Samples collected at a frequency less than daily
shall be taken on a day and time that is characteristic of the discharge over the entire period
which the sample represents: All samples shall be taken at the monitoring points specified in
this permit and, unless otherwise specified, before the effluent joins or is diluted by any other
wastestream, body of water, or substance. Monitoring points shall not be changed without
notification to and the approval of the Permit Issuing Authority.
• 2. Reporting
Monitoring results obtained during the previous month(s) shall be summarized for each month
and reported on a monthly Discharge Monitoring Report (DMTR) Form (DEM No. MR 1, 1.1, 2,
31 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
ATTENTION: Central Files
Post Office Box 29535
Raleigh, North Carolina 27626-0535
3. Flow Measurements
Appropriate flow measurement devices and methods consistent with accepted scientific
practices shall be selected and used to ensure the accuracy and reliability of measurements of
the volume of monitored discharges. The devices shall be installed, calibrated and maintained
to ensure that the accuracy of the measurements are consistent with the accepted capability of
that type of device. Devices selected shall be capable of measuring flows with a maximum
deviation of less than + 10% from the true disci,-.rge rates throughout the range of expected

:e Part II
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discharge volumes. Once-through condenser cooling water flow which is monitored by pump
logs, or pump hour meters as specified in Part I of this permit and based on the manufacturer's
s► pump curves shall not be subject to this requirement.
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to the EMC regulations published
pursuant to NCGS 143-215.63 et. seq, the Water and Air Quality Reporting Acts, 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; or in the case of sludge use or
disposal, approved under 40 CFR 136, unless otherwise specified in 40 CFR 503, unless
other test procedures have been specified in this permit.
To meet the intent of the monitoring required by this permit, all test procedures must produce
minimum detection and reporting levels that are below the permit discharge requirements and
all data generated must be reported down to the minimum detection or lower reporting level of
the procedure. If no approved methods are determined capable of achieving minimum
detection and reporting levels below permit discharge requirements, then the most sensitive
(method with the lowest possible detection and reporting level) approved method must be used.
5. Penalties for Tampering
The Clean Water Act provides that any person who falsifies, tampers with, or knowingly
renders inaccurate, any monitoring device or method required to be maintained under this
permit shall, upon conviction, be punished by a fine of not more than S10,000 per violation, or
by imprisonment for not more than two years per violation, or by both. If a conviction of a
person is for a violation committed after a first conviction of such person under this paragraph,
punishment is a fine of not more than S20,000 per day of violation, or by imprisonment of not
more than 4 years, or both.
6. Records Retention
Except for records of monitoring information required by this permit related to the permittee's
sewage sludge use and disposal activities, which shall be retained for a period of at least five
years(or longer as required by 40 CFR 503), the permittee shall retain records of all
monitoring information, including all calibration and maintenance records and all original strip
chart recordings for continuous monitoring instrumentation, copies of all reports required by
this permit, for a period of at least 3 years from the date of the sample, measurement, report
or application. This period may be extended by request of the Director at any time.
7. Recording Results
For each measurement or sample taken pursuant to the requirements of this permit, the
permittee shall record the following information:
a. The date,exact place, and time of sampling or measurements;
b. The individual(s) who performed the sampling or measurements;
c. The date(s) analyses were performed;
d. The individual(s) who performed the analyses;
e. The analytical techniques or methods used; and
f. The results of such analyses.

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8. Inspection and Entry
The permittee shall allow the Director, or an authorized representative (including an authorized
contractor acting as a representative of the Director), upon the presentation of credentials and
other documents as may be required by law, to;
a. Enter upon the permittee's premises where a regulated facility or activity is located or
conducted, or where records must be kept under the conditions of this permit;
b. Have access to and copy, at reasonable times, any records that must be kept under the
conditions of this permit;
c. Inspect at reasonable times any facilities, equipment (including monitoring and control
equipment), practices, or operations regulated or required under this permit; and
d. Sample or monitor at reasonable times, for the purposes of assuring permit compliance or
as otherwise authorized by the Clean Water Act, any substances or parameters at any
location.
SECTION E. REPORTING 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.
2. Planned Changes
The permittee shall give notice to the Director as soon as possible of any planned physical
alterations or additions to the permitted facility. Notice is required only when:
a. The alteration or addition to a permitted facility may meet one of the criteria for determining
whether a facility is a new source in 40 CFR Part 122.29 (b); or
b. The alteration or addition could significantly change the nature or increase the quantity of
pollutants discharged. This notification applies to pollutants which are subject neither to
effluent limitations in the permit. nor to notification requirements under 40 CFR Part 122.42
(a) (1).
c. The alteration or addition results in a significant change in the permittee's sludge use or
disposal practices, and such alternation, addition or change may justify the application of
permit conditions that are different from or absent in the existing permit, including
notification of additional use or disposal sites not reported during the permit application
process or not reported pursuant to an approved land application plan.
3. Anticipated Noncompliance
The permittee shall give advance notice to the Director of any planned changes in the permitted
facility or activity which may result in noncompliance with permit requirements.

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4. Transfers
This permit is not transferable to any person except after notice to the Director. The Director
may require modification or revocation and reissuance of the permittee and incorporate such
other requirements as may be necessary under the Clean Water Act.
5. Monitoring Reports
Monitoring results shall be reported at the intervals specified elsewhere in this permit.
a. Monitoring results must be reported on a Discharge Monitoring Report (DMR) (See Part II.
D. 2 of this permit) or forms provided by the Director for reporting results of monitoring of
sludge use or disposal practices.
b. If the permittee monitors any pollutant more frequently than required by the permit, using
test procedures specified in Part II, D. 4. of this permit or in the case of sludge use or
disposal, approved under 40 CFR 503, or as specified in this permit, the results of this
monitoring shall be included in the calculation and reporting of the data submitted in the
DMR.
c. Calculations for all limitations which require averaging of measurements shall utilize an
arithmetic mean unless otherwise specified by the Director in the permit.
6. Twenty-four Hour Reporting
a. The permittee shall report to the central office or the appropriate regional office any
noncompliance which may endanger health or the environment. Any information shall be
provided orally within 24 hours from the time the permittee became aware of the
circumstances. A written submission shall also be provided within 5 days of the time the
permittee becomes aware of the circumstances. The written submission shall contain a
description of the noncompliance, and its cause; the period of noncompliance, including
exact dates and times, and if the noncompliance has no been corrected, the anticipated time
it is expected to continue; and steps taken or planned to reduce, eliminate, and prevent
reoccurrence of the noncompliance.
b. The following shall be included as information which must be reported within 24 hours
under this paragraph:
(1) Any unanticipated bypass which exceeds any effluent limitation in the permit.
(2) Any upset which exceeds any effluent limitation in the permit.
(3) Violation of a maximum daily discharge limitation for any of the pollutants listed by the
Director in the permit to be reported within 24 hours.
c. The Director may waive the written report on a case-by-case basis for reports under
paragraph b. above of this condition if the oral report has been received within 24 hours.
7. Other Noncompliance
The permittee shall report all instances of noncompliance not reported under Part II. E. 5 and 6.
of this permit at the time monitoring reports are submitted. The reports shall contain the
information listed in Part II. E. 6. of this permit.

Part II
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Page 14 of 14
8. Other Information
Where the permittee becomes aware that it failed to submit any relevant facts in a permit
application, or submitted incorrect information in a permit application or in any report to the
Director, it shall promptly submit such facts or information.
9. Noncompliance Notification
The permittee shall report by telephone to either the central office or the 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.
Persons reporting such occurrences by telephone shall also file a written report in letter form
within 5 days following first knowledge of the occurrence.
10. 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.
11. Penalties for Falsification of Reports
The Clean Water Act provides that any person who knowingly makes any false statement,
representation, or certification in any record or other document submitted or required to be
maintained under this permit, including monitoring reports or reports of compliance or
noncompliance shall, upon conviction, be punished by a fine of not more than S10,000 per
violation, or by imprisonment for not more than two years per violation, or by both.

PART III
OTHER REQUIREMENTS
A. Construction
No construction of wastewater treatment facilities or additions to add to the plant's treatment
capacity or to change the type of process utilized at the treatment plant 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.
B. 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.
C. Changes in Discharges of Toxic Substances
The permittee shall notify the Permit Issuing Authority as soon as it knows or has reason to
believe:
a.That any activity has occurred or will occur which would result in the discharge, on a
routine or frequent basis, of any toxic pollutant which is not limited in the permit, if that
discharge will exceed the highest of the following "notification levels";
(1) One hundred micrograms per liter(100 ug/1);
(2)Two hundred micrograms per liter (200 ug/1) for acrolein and ac-ylonitrile; five
hundred micrograms per liter (500 ugh) for 2.4-dinitrophenol and for 2-methyl-4.6-
dinitrophenol; and one milligram per liter (1 mg/1) for antimony;
(3) Five (5) times the maximum concentration value reported for that pollutant in the
permit application.
b. That any activity has occurred or will occur which would result in any discharge,•on a
non-routine or infrequent basis, of a toxic pollutant which is not limited in the permit, if
that discharge will exceed the highest of the following "notification levels";
(I)Five hundred micrograms per liter (500 ug/1);
(2) One milligram per liter(1 mg/I) for antimony;
(3) Ten (10) times the maximum concentration value reported for that pollutant in the
permit application.
D. Requirement to Continually Evaluate Alternatives to Wastewater Discharges
The permittee shall continually evaluate all wastewater disposal alternatives and pursue the
most environmentally sound alternative of the reasonably cost effective alternatives. If the
facility is in substantial non-compliance with the terms and conditions of the NPDES permit
or governing rules, regulations or laws, the permittee shall submit a report in such form and
detail as required by the Division evaluating these alternatives and a plan of action within
sixty (60) days of notification by the Division.

E. Toxicity Reopener Condition
This permit shall be modified, or revoked and reissued to incorporate toxicity limitations
and monitoring requirements in the event toxicity testing or other studies conducted on
the effluent or receiving stream indicate that detrimental effects may be expected in the
receiving stream as a result of this discharge.
F. 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.
G. There shall be no discharge of polychlorinated byphenyl compounds such as those
commonly used for transformer fluid.
H. Biocide Condition
The permittee shall not use any biocides except those approved in conjunction with the
permit application. The permittee shall notify the Director in writing not later than ninety
(90) days prior to instituting use of any additional biocide used in cooling systems which
may be toxic to aquatic life other than those previously reported to the Division of
Environmental Management. Such notification shall include completion of Biocide
Worksheet Form 101 and a map locating the discharge point and receiving stream.
I. Continued intake screen backwash discharge, transformer cooling water and
combustion turbine cooling water discharges are 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. 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.
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.

O. CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
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 *September 1989) or subsequent
versions.
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 the effective date of this permit during the months
of January, April, July and October. Effluent sampling for this testing shall be performed
at the NPDES permitted final effluent discharge below all treatment processes.
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:
Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical
measurements performed in association with the toxicity tests, as well as all
dose/response data. Total residual chlorine of the effluent toxicity sample must be
measured and reported if chlorine is employed for disinfection of the waste stream.
Should 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.
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 extent caused be operational error, improperly designed treatment

facilities, inadequate treatment facilities, lack of preventive maintenance, or improper
operations.
Q. 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.
R. Pollutant Analysis Condition
The permittee shall conduct a test for 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 Monitoring (APAM)
Requirement Reporting Form A and accompanying memo, 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 Monitoring
Requirement" (APAM).
(2) Other significant levels of organic chemicals must be identified and approximately
quantified. For the purpose of implementing this requirement, the largest 10 GC/MS
peaks in the purgeable base/neutral extractable, and acid extractable fractions (or fewer
than 10, if less than 10 unidentified peaks occur)for chemicals other than those specified
on the APA Requirement Reporting Form A should be identified and approximately
quantified as stated in the APAM Reporting Form A instructions. This part(item 2) of
the APAM requirement is to be referred to as the "10 significant peaks rule").
S. Beginning on the effective date of this permit and lasting until expiration,there shall
be no discharge of plants wastes to the ash pond unless the permittee provides and
maintains at all times a minimum free water volume (between the top of the sediment
level and the minimum discharge elevation) equivalent to the sum of the maximum 24-
hour plant discharges plus all direct rainfall and all runoff flows to the pond resulting
from a 10-year, 24-hour rainfall event,when using a runoff coefficient of 1.0. During the
term of the permit,the permittee shall remove settled material from the ponds or
otherwise enlarge the available storage capacities in order to maintain the required
minimum volumes at all times. No later that 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 fro the following year. Present
information indicates a needed volume of 95.36 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.

T. It has been demonstrated that under certain conditions it is possible to reduce the
concentration of metals in boiler cleaning wastes in the range of 92 to 99+percent by
treatment in ash ponds. Because of dilution problems, and the existence of boundary
interface layers at the extremities of the plume,it is difficult to prove beyond doubt that
the quantity of iron and copper discharged will always be less than one milligram per liter
times the flow of metal cleaning when treated in this manner.
The application of physical/chemical methods of treating wastes has also been
demonstrated to be effective in the treatment of metal cleaning wastes. However,the
effectiveness of ash pond treatment should be considered in relation to the small
differences in effluent quality realized between the two methods.
It has been demonstrated 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 prior to metal cleaning waste addition.
4. Four days retention time in ash pond with effluent stopped.
5. Boiler volume less than 86,000 gallons.
6. Chemicals for cleaning to include only one or more of the following:
a. Copper removal step- sodium bromate, NaBrO; ammonium carbonate,
(NH)CO; and ammonium hydroxide, NHOH.
b. Iron removal step-hydrochloric acid, HC1; and ammonium bifluoride, (NH)BF
and proprietary inhibitors.
7. Maximum dilution of wastes before entering ash pond 6 to 1.
8. After treatment of metal cleaning wastes, if monitoring of basin effluents as required
by the permit reveals discharges outside the limits of the permit. 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.
U. Discharge of any waste resulting from the combustion of toxic or hazardous waste to
any waste stream which ultimately discharges to waters of the United States is prohibited,
unless specifically authorized in this permit.
V. The Permittee shall report all visible discharges of floating materials, such as, an oil
sheen to the Director when submitting DMR's.
W. The permittee shall check the diked areas for leaks by a visible inspection and shall
report any seepage detected.

PART IV
ANNUAL ADMINISTERING AND COMPLIANCE MONITORING FEE REQUIREMENTS
A. The permittee must pay the annual administering and compliance monitoring fee within 30
(thirty)days after being billed by the Division. Failure to pay the fee in a timely manner in
accordance with 15A NCAC 2H.0105(b)(4)may cause this Division to initiate action to
revoke the permit.

MEMO IC
DATE:TO N� 2 L, 1 /K
TO: tKL ��AIZVC� FYI SUBJECT: NCDOO 49 I
1`i00 5 v .-C.L. g0
11ERG.; T 11 'RNe-uv AL �'Nfacz M 1 i i Dial FDA \(OV(Z
Vil.C5 . 1 N\ 5 \ 6 ISC- )1,4 L\ 14.,.. C.LJ cyL D ktv i NCB EPc
Nb C -fag O- kc.p,T1Dr- ?)-c Av5(. . Cr- (5 A 5 Abel- 1tVi`'\
Frz-P-.,-V.-C p,�C-5 7 3 I -9 6) .
4\64y QvC S rocs LE"— eV\ 1 /\I6V.' -
; tal______
6e3,7_4 ,
N•c NT,KEwp i,
s1 TURp,L Rsort
'i 28199"
000***41° From: AKDY W/'="9/--��
t o,, North Carolina Department of Environment,
fir .' l Health, and Natural Resources
�(� Printed on Recycled Paper

!� Moeec,5
• Duke Power Company
Generation Services Department
13339 Hagers Ferry Road
Huntersvi le,NC 28078-i 929
wwarwa DUKE POWER
•dam_
May 23, 1994
Ms. Collen Sullins
Permits and Engineering Unit
North Carolina Department of Environment,
Health and Natural Resources
P.O. Box 29535
Raleigh, North Carolina 27626-0535 >aN :a : ; WATOIrti,
et- m +ink $tom
Subject: NPDES Permit Renewal, NC#0004961 •
JUN 23 11
Riverbend Steam Station, Gaston County
File: RB-706.15 DIVISION OF ENVIRONMENTAL MANAGEMENT
_I
CERTIFIED: P-384-366-890 MOORESVILLE REGIONAL OfEIGE MANAG
Dear Ms. Sullins:
The above referenced permit expires November 30, 1994. GS 143-215.1 (C)
and Part 11.6.10 of the subject permit require the submittal of an application for
renewal at least 180 days prior to expiration.
Please find enclosed in triplicate, the application for renewal of the subject
permit and a check in the amount of $400.00 to cover the renewal processing
fees pursuant to 15 NCAC 2B.0105(b). We request notification that the
application is complete.
Please note that current data is used throughout the NPDES application where
available. In addition, supplemental information is enclosed to reflect
conditions for the station. This information is representative of station
operation for the period of 2/93 - 3/94. Riverbend has recently undergone an
extensive Plant Modernization Program (PMP) that was completed February
1993.
Should you have any questions or desire additional information, please contact
Gerry C. Parker [phone].
Very Truly Yours,
AohniS. Carter
Technical Systems Manager
GSD/Environmental Division
Panted on recycled paper

(fill—in areas are spaced for elite type, i.e., 12 characters/inchI.
'S:.' - _ 'aJS'� VI ONMENT l,T OT,EC ON' tiENCY " -
-+FF M e ,� It t;,.-'<..:.ra� t t$. ... I a�!., .. . T I .EPA LD:NUMBER:,.
A GENERAL 1NFOP MATION _�
1 ��� PA Consolidated Permits Program F •- D
GENERAL! (Read the"General Ina tructiors"before starting.) 1 = - ,>, I. ,S
LABEL ITEMS .- GENERAL INSTRUCTIONS ,;
\ \ \ \ \ If a preprinted label has been provided,'affix
I. PA I.D. NUMBER\ a g in the designated space. Review the inform-
tion carefully; If any of Itls:incorrect, cross:
\III. FACILITY AME through it and enter the correct data in the)
,h ,..appropriate fill—in area below. Also,,if any of,
:\\1\\\,. ;.„ left of�thet label
is absent.(the erBa to the Y• space lists the Information
V. MAILIN ADDRESS P EASE PL • LABEL IN HIS SPAC • that should appear), please provide it in the
proper fill—in area(s) below. If the label is
complete and correct, you need not complete
\\\ Items 1, III, V, and-VI (except VI-B whkh
must be completed regardless). Complete all
• FACILITY items if no label hes been provided. Refer to•
V I. LOCATION the instructions for detailed Item descrip•,
tions end for the legal authorizations under-
which this data is collected.
II.POLLUTANT CHARACTERISTICS
INSTRUCTIONS: Complete A through J to determine whether you need to submit any permit application forms to the EPA. If you answer"yes"to any
questions, you must submit this form and the supplemental form listed in the parenthesis following the question.Mark"X"in the box in the third column
if the supplemental form is attached. If you answer,"no"to each question,you need not submit any of these forms.You may answer"no"if your activity
is excluded from permit requirements;lee Section C of the instructions.See also,Section 0 of the instructions for definitions of bold—faced terms:
T tdARjC'X• MAFuS'X'•
SPECIFIC QUESTIONS - v=• Ho' 'SPECIFIC QUESTIONS - vas Ho TACH
ATTACHED• ._ ATTACHED
'`A: Is,this'facility-a publicly'owned.:treatment',works B. Does or will this�acility.;(gither,existing or proposed),
which results in'a discharge to waters of the'U.S.?' • include'a concentrated animal:feeding operation or
(FORM 2A) X aquatic animal production facility which'results in a- X
__ +. I ,• discharge to waters of the U.S.?(FORM 28) • ,. :o :+
C. Is this a facility which currently results in discharges D. Is this a proposed facility (other than those described
to waters of the U.S..other than those described in X X In A or B above), which will result In a discharge to- X
A or 8 above?(FORM 2C) 21 a :, I 'waters of the U.S.?(FORM 2D) 25 .. 27
E. Does or will this facility treat, store, or dispose of F. Do you or will you inject at this facility industrial ors
hazardous wastes? (FORM 3) _ X municipal effluent below the lowermost stratum con- X
taining, within one quarter mile of-the well bore,
_� 20 �•. underground sources of drinking water?(FORM 4) - „ „ „
G. Do you or will you inject at this facility any produced 1
H. Do you or wlll',you Inject at this facility fluids for spa-
water or other fluids which are brought to the surface X dal processes such as mining of sulfur by the French X
in connection with conventional oil or natural gas pro-
duction, inject fluids used for enhanced recovery.of
process, solution mining of minerals, in situ combut '
oil or natural gas, or inject fluids for storage of liquid tion of-fossilfuel,or recovery-of-geothermal energy)...
hydrocarbons?(FORM 4) 34 s• ,. (FORM 4) .7 s. 711
I. Is this facility a proposed stationary source which is J. Is this facility a proposed stationary source which is.
one of the 28 industrial categories listed in the in-- NOT one of the 28 industrial categories listed in the
structions and which will potentially emit..100 tons X • instructions and-which will potentially emit 250 tons. X •
per year of any air pollutant regulated under the per year of any air pollutant regulated under the Clean.
Clean Air Act and may affect or be located in an Air Act and may affect or be located in an attainment
attainment area?(FORM 5). - -40 --41 - -.42 ' - area?(FORM 5) 43 44 - 45
III.NAME OF FACILITY
c
1 SKIP RIVERBEND STEAM S T A T I O N
15 I4 -a 30 . . . . . . •4.
IV. FACILITY CONTACT
A. NAME&TITLE(last. first, & title) B.PHONE(area code&no.)
c I I I I I I I T I I I I I I I I I I I I I I I I I I I I I II 1 I I i I
2 CARTER JS TECHNICAL SYS MGR 7 0 4 8 7 5 5 9 5 4
V. FACILITY MAILING ADDRESS
A.STREET OR P.O.BOX
1c I I I I I 1 1 I I I I I I 1 I I I I I I I I I I I I 1 1 I
3 1 3 3 3 9 HAG E R S FERRY R R Y ROAD A D M G 0 3 A 5
I. I. . . . -..
B.CITY OR TOWN C.STATE D. ZIP CODE
e I I I I I I I I I I T I- T 1 1 I I 1 T T 1 T L T I 1 1 I 1
4 H U N T E R S V I L L E NC 2 8 0 7 8
VI. FACILITY LOCATION
A.STREET, ROUTE NO.OR OTHER SPECIFIC IDENTIFIER •
1c I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I
P O B O X 3 6 7
,l1,. 45
B.COUNTY NAME
MI G1 Ai SI TI Ol Nl I I I I I I l I l l I T l 1 1 I I 4. - 70
C.CITY OR TOWN D.STATE E.ZIP CODE F.COUNTY CODE
c I I I I I I 1 I I I 1 I I I 1 T T 1 1 T T T 1 I I - I - T I I 1 If n4 Wn)
k6IMOUNT HOLLY NC 28120
13 I. - 941 42 47 - !I !S' - 74
EPA Form 3510-1 (8-90) CONTINUE ON REVERSE

NTINUED FROM THE FRONT
VI I.SIC CODES,{4-digit,In order of priority)
A. FIRST B.SECOND a
I I fl (specify) I I I
1(specify)
7 4, 9, 1 , 1 Electric Services L. _ •12
C.THIRD D. FOURTH
I i I (specify) I II (specify)
7 •
7
I. S I.
Is /s � �IS
VIII.OPERATOR INFORMATION.
A. NAME B. Is the name listed In
c I I 1 I 1 I I i I 1 I i i I I I I I I i i I I I 1 i I 1 I I I I I 1 I I I 1 I !ten,VIII-A also the
owner?
� C]
g DUKE POWER COMPANY YESNO
IS U .. ea
C.STATUS OF OPERATOR (Enter the appropriate letter into the answer box;if"Other",specify.) D.PHONE(area code&no.) i
F =FEDERAL M=PUBLIC(other than federal or state) I(specify) 1 I I TATE O =OTHER(specify) I P I A �7 0 4 Tr
7 5 15 9 5 4 ( •
P =PRIVATEll) Jr} {
is 4
E.'STREET OR P.O.BOX
11 1 1 1 1 I 1 1 1 1 I 1 I 1 1 1 l 1 l 1 1 1 1 1 1 1 1 ;
4 2 2 SOUTH CHURCH STREET
24 SS AI-
F.CITY OR TOWN .. G.STATE H.ZIP CODE IX.INDIAN LAND
I I 1 1 I 1 I I II 1 III I 1 1 1 1 1 1 1 1 1 I I 1 I i
g CHARLOTTE I N C 2 8 2 4 2 ®
Is the facility located on Indian lands? •
F-1 YES NO
1 1 1 1 1 , 1 1 1 1 , 1 , , 1 1 1 1 , . , 1 . I 1 1 1 1 62
Is 14 ..... S. 'III 42 47 51
X.EXISTING ENVIRONMENTAL PERMITS IMIIIIIIIMMIIIIIIIIIIIIMIIIIIMIIIIIIIIIIIIIIIIIIMIII
A. NPDES(Discharges to Surface Water) o..Pso(Air Emissions from Proposed Sources)
TNIIIIIIIIIIII . 9 i.. i i I I 1 I I i 1 I I I i I _
9 NC000496, 1, , ,
IS 11S, . , 1 , - • Se I, 14 17. IS .. - 20 .
B. U IC(Underground Injection of Fluids) E.OTHER(specify)
c r I I r I I I I r I I 1 c r 1 1 I 1 1 1 1 r I
9IUI I I g + (3 7 8 8 R 1 4I I 1 1 Quality Boiler 4 , 5 ,
IS IS 17 II 2. Is 1e 17111S. - s.J(spedil)l)Air
6 , 7 and CT' s
C. RCRA(Hazardous Wastes). E.OTHER(specify)
c r 1 I I I I I I I I I I I I c r 1 1 1 1 I I 1 1 I 1 I I I (specify)
9 R 9
IS . 17 1S - SO IS 14 17 IS - 20
XI.MAP
Attach to this application a topographic map of the area extending to at least one mile beyond property bounderies.The map must show
the outline of the facility,the location of each of its existing and proposed intake and discharge structures,each of its hazardous waste
treatment, storage, or disposal facilities, and each well where it injects fluids underground. Include all springs, rivers and other surface
water bodies in the map area.See instructions for precise requirements.
XII.NATURE OF BUSINESS(provide a brief description
Coal fired steam electric generation
XIII.CERTIFICATION(see instnjctionsl
l certify under penalty of law that I have personally examined and am familiar with the information submitted in this application and all
attachments and that, based on my inquiry of those persons immediately responsible for obtaining the information contained in the
application, I believe that the information is true, accurate and complete. / am aware that there are significant penalties for submitting
false information,including the possibility of fine and imprisonment.
A. NAME &OFFICIAL TITLE(type or printi B.SIGNATURE C. DATE SIGNED
M.D. McIntosh, Vice President '��,
Fossil/Hydro Generation Department '" / 5/,Z4/Y
COMMENTS FOR OFFICIAL USE ONLY
C
15 IS
SS
EPA Form 3510-1 (8-90)

Please print or type in the unshaded areas only. f NC0004961 Approval expires 5-31-92
FORM Egis'Xirikto Y R IR ' U.S. ENVIRONMENTAL:PROTECTION.AGENCY. "
q p .?A . P
1 3�+ Wit. •1. � APPLICATION FOR PERMIT TO DISCHARGE WASTEWATER ••- +;,c":
'L II �wl�E v� rEXISTING MANUFACTURING,COMMERCIAL,MINING AND SILVICULTURAL OPERATIONS
PDES „l;.u;„_oi., • . ,;;,.''` Consolidated Permits Program
OUTFALL'„LOCAT,10N'••
For eech'outfall*i: "the latitude and longitude of its location to the nearest 15 seconds and the name of the receiving water.
• .OUTFALL". - B.LATITUDE C. LONGITUDE
NUMBER•.- �� �' D. RECEIVING WATER (name)
t (list) t.ota. i.MIN. I..6C. t.O . Z.MIN. 3..IC.
001 35 21 28 80 58 29 Mountain Island Lake (Catawba River)
002 35 21 28 80 58 29 Mountain Island Lake (Catawba River)
II.FLOWS,SOURCES OF POLLUTION,AND TREATMENT TECHNOLOGIESMIIIIIIIIIIIIIIIIIMIIIIIIIIIIMIIIIIIMIEIIIIIIIIIII
A. Attach a line,idrawing Mowing 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_linedrawing by showing average '
• flows.between Intakes, operations, treatment units, and outfalls. If a water balance cannot be determined (e.g., for certain mining activities),provide a
pictorial-d*rIptionof theYnature end amount of any sources of water and any collection.or,treatment measures.
(Ba,For each'0utfal1;provldewa description of: (1) All-operations contributing wastewater.to-the.effluent,including proces&. lagegvater,sanitary wastewater,'
•cooling;itvater,and stom r •water'=runoff;(2) The average flow contributed by each operation;and'(3) The treatment received by the wastewater:`Continue'.
on additional sheets H•necessary.
/.OU q 2.'O!E RATION(S)CONTRIBUTING FLOW • 3.TREATMENT "
T-
FALLNO - b. AVERAGE FLOW � ,..
(I(a f) ,� J.OPERATION(14t) b..LIST CODE$FROM
• • - ..... (include units) _ 'a. DESCRIPTION TABLE 2C 1
001 Condenser Cooling 329MGD Screening IT
Water (once through non- Discharge to surface water 4A
contact). Includes intake
screen backwash.
Ash Basin Discharge 4.8MGD Chemical Coagulation 2D
002 settling, neutralization 1U 2K
Ion Exchange 2J
Discharge to surface water 4A
•
OFFICIAL USE ONLY(effluent guidelines sub-categories)
..... -._. .�.. ... ._ _. _ _— . . r.nr.rTlnlIIF CAI DrwRCE

CONTINUED FROM THE FRONT
C.Excatt for stol'm runoff,leaks,or spills,are any of the discharges described in Items II-A or B intermittent or seasonal?
YES(complete the following table) ®NO (go to Section III)
3. FREQUENCY 4. FLOW
1. OUTFACE 2: OPERATION e. DAYS b.MONTHS a. FLOW RATE b.TOTAL VOLUME(s)
NUMBER CONTRIBUTING FLOW PER WEEK PER YEAR (in mgd) (specify with units) C. DVR-
(list) (list) (specify (specify I.LONG TERM 2. MAXIMUM I. LONG TERM 2.MAXIMUM ATION
average) average) AVERAGE DAILY AVERAGE DAILY (in days)
G
III.PRODUCTION
A.Does an effluent guideline limitation promulgated by EPA under Section 304 of the Clean Water Act apply to your facility?
J YES(complete Item III-B) NO(to to Section IV)
B.Are the limitations in the applicable effluent guideline expressed in terms of production(or other measure of operation)?
YES(complete Item III-C) u]No(go to Section IV)
C. If you answered"yes"to Item III-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.
`$. 1.AVERAGE DAILY PRODUCTION 2:AFFECTED
OUTFALLS
C.QUANTITY PER DAY b.UNITS OF C.0 ION,PRODUCT,MATERIAL. ETC. ()tat outfall numbers)
(specify)
I.V.IMPROVEMENTS •
A. Are you now required by any Federal,State or local authority to meet any implementation schedule for the construction,upgrading or operation of waste-
water treatment equipment or practices or any other environmental programs which may affect the discharges described in this application?This includes,
but is not limited to, permit conditions,administrative or enforcement orders,enforcement compliance schedule letters,stipulations,court orders,and grant
or loan conditions. YES(complete the following table) QNO(go to Item IV-B) Ng(
I�I/A�
t.IDENTIFICATION OF CONDITION, 2.AFFECTED OUTFACES S.BRIEF DESCRIPTION OF PROJECT PLIANC(DA ecQp
TE
AGREEMENT.ETC. a.no. b.SOURCE or DISCHARGE QUIIRItD JECTEo
,B`tO.I T;IONAL: You may attach additional sheets describing any additional water pollution control programs(or other environmental projects which may affect
i::,'sYPUAdischarges),you now have underway or which you plan. Indicate whether each program is,now underway or planned,and indicate your actual or
1 1 ff.)M:1ulas.for.construction.- . •
'.F, ,q, . �MARK�"' `1D16>sRIPT1gN'OP'ADDFTIONAC CtST.ROt:PROGRiAM$'IS ATTACHED' •
s '

EPA I.D. NUMBER(copy from Item 1 of Form 1)
CONTINUED FROM PAGE 2 NC0004961
. INTAKErAND EFFLUENT CHARACTERISTICS
B,&C: See instructions before proceeding—Complete one set of tables for each outfall-Annotate the outfall number in the space provided. •
NOTES Ttlbles V-A,V-B,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 maybe
discharged from any outfall. For every pollutant you list,briefly describe the reasons you believe it to be present and report any analytical data in your
possession. .
t. POLLUTANT 2. SOURCE 1. POLLUTANT 2.SOURCE
Asbestos Clean-up of containment
areas from asbestos strip-
ping/handling operations .
Trace amounts may be dis-
charged to the ash basin.
•
VI.POTENTIAL DISCHARGES NOT COVERED BY ANALYSIS
Is any pollutant listed in Item V-C a substance or a component of a substance which you currently use or manufacture as an intermediate or final product or
byproduct?
YES (list all such pollutants below) NO(go to Item VI-B)
•
EPA Form 3510-2C (8-90) PAGE 3 OF 4 CONTINUE ON REVERSE

CONTINUED FROM THE FRONT
VII. BIOLOGICAL TOXICITY TESTING DATA : ,
Do you Rave any knowledge or reason to believe that any oio ogicai test to; acute or chronic toxicity has been mane on any of your aiscnarges or on a
receiving water in relation to your discharge within the last 3 years?
X YES(identify the test(s)and describe their purposes below) n NO (go to Section VIII)
Quarterly analysis of Ceriodaphnia Dubia acute LC50 per current permit requirements on
Outfall 002
•
VIII.CONTRACT ANALYSIS INFORMATION
Were any of the analyses reported in Item V performed by a contract laboratory or consulting firm?
Es (list the name,address, and telephone number of,and pollutants ❑N O(go to Section IX)
analyzed by, each such laboratory or firm below)
A. NAME B. ADDRESS C.TELEPHONE D.POLLUTANTS ANALYZED
(area code&no.) (list)
Heritage Laboratories 4132 Pompano Road [phone] Total Radium
Inc. (Certificate #98) Charlotte, N.C. 28216 Radium 226
Phenols
Sulfide
Sulfite
Bromide
Color
Cyanide
MBAS
Fluoride
IX.CERTIFICATION
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted.Based on my inquiry of the person or persons who manage the system or
those persons directly responsible for gathering the information,the information submitted is,to the best ofmyknowledge and belief,true,accurate,and complete.
/am aware that there are significant penalties for submitting false information,including the possibility of fine end imprisonment for knowing violations.
A. NAME&OFFICIAL TITLE (type or print) B.PHONE NO. (area code& no.)
M.D. McIntosh, Vice President Fossil/Hydro Gen. Dept. 704-382-5941
C.SIGNATURE D. DATE SIGN D
•
PAGE 4 OF 4
EPA Fnrm '15ttt_In tR_om

PLEASE PRINT OR TYPE IN THE UNSHADED AREAS ONLY. You may report some or all of EPA I.D.NUMBER(copy from Item 1 of Form 1) Form Approved
this information on separate sheets(use the same format)instead of completing these pages. OMB No 2040-0086
SEE INSTRUCTIONS NC0004961 Approval erpires7-31-88
Z' ; .............'\'ti'i„�',�;•C;': ;;•'.7.+..' ' 2\ti::,OUTFALL NO.
V.INTAKE AND EFFLUENT CHARACTERISTICS(continued from page 3 of Form 2-C) ..' :,.' iaMial'e = bass,..t3? t Z _ Z::4 Riverbend 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.INTAKE(optional)
1.POLLUTANT a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If available) (If avaYsble) d.NO.OF a.Concert- b.Mass b.NO.OF
(1)Concentration (2)Mass (1)Concentration (2)Mass (1)Concentration (2)Mass ANALYSES talon (1)Concentration (2)Mass ANALYSES
a.Bloaien+er Ongen 1.7 3099.8 1 mg/I lb/Day 0.4 453.8 1
Demand(BOO)
b.Chs dcal Onypen 13.7 24980.3 1 mg/I lb/Day < 10 < 11345.0 1
Demand(COO)
c.Total Organic 2.7 4923.1 1 mg/I lb/Day 2 2269.0 1
Carbon(TOC)
d.Tom Suspended 8 14587.1 1 mg/I lb/Day 8 9076.0 1
Solids(TSS)
e.Ammonia(as N) < 0.05 < 91.2 1 mg/I lb/Day < 0.05 < 56.7 1
I.Flow VALUE VALUE VALUE MGD X VALUE
218.5 CR 135.95 CR
g Temperature VALUE VALUE VALUE VALUE
(*Inter) 17.3 DEGREES CELSIUS 7.5 366
h.Temperatre VALUE VALUE VALUE VALUE
(a"""ef) DEGREES CELSIUS _
I.pH MINIMUM MAXIMUM MINIMUM MAXIMUM f`,I``��` " , t! \\ ,: "'�``,`z "'�`'��2 �••„{•4:\` `' ii
nni
7 �, i�,\�'. ':�>3....���,::s':::� 1 STANDARD UNITS ��.;\\�> i:.::� ..,w��;,\�;<��ziiti�;i��ii��:,`zM;
PART B-Mark"X"in column 2a for each pollutant you know or have reason to believe Is present.Mark"X'in column 2b 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.
1.POLLUTANT 2.MARK10 2.EFFLUENT _ 3.UNITS • 4.INTAKE(optional)
AND CAS NO. a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If available) a.pre- b.ab- (If available) (X available) d.NO.OF a.Conan- b.Mass b.NO.OF
sant sent (1)Corrwrtafan (2)Mass (1)Concertration (2)Mass (1)Concentration (2)Mass ANALYSES talon (1)Cancertalon (2)Mass ANALYSES
a.Bromide X < 1.2 < 2188.1 1 mg/I lb/Day < 1.2 < 1361.4 1
(24959-67-9)
b.C donna, X < 0.5 < 911.7 T• mg/I lb/Day < 0.5 < 567.3 1
Tom Resldtrl
c.Color X 17.5 X 1 Std.Units X 10 X 1
-
d.Few X 46 X 1 Colonies X 4 X 1
Colton:
/100 ml
e.Flounaa X < 0.1 < 182.3 1 mg/I lb/Day < 0.1 < 113.5 1
(16984-48-8)
f.write- X 0.37 674.7 1 mg/I lb/Day 0.36 408.4 1
wrlro(as N)
EPA Form 3510-2C(Rev.2-85) PAGE V-1 CONTINUE ON PAGE V-2

EPA I.D.NUMBER(copy from Bem 1 of Form 1) OUTFALL NUMBER Form Approved
ITEM V-B CONTINUED FROM FRONT
NC0004961 Rlverbend 001 OMB No. plres7
Approval e�lres 7-31-8886
1.POLLUTANT 2.MARK X 3.EFFLUENT 3.UNITS 4.INTAKE(optional)
AN( N) a.pr► D.ab f aver)
O. a.MAXIMUM DAILY VALUE b. AMU 30 DAY VALUE c.LOGM AVG.VALUE a.LONG TERM AVG.VALUE
d.NO.OF a.Canary b.Mass D.No.OF
N�ro�a� sect sent .{1)Concentration (2)Mass (1)Carantatlan (2)Mass (1)Concentalon (2)Mass ANALYSES talon (1)Concentration 4.(2)Mass ANALYSES
9 Toer Organic X 0.65 1185.2 1 mg/I lb/Day 0.4 453.8 1
(as N) ,
hOtiand
Grease X < 0.1 < 182.3 1 my/1 lb/Day < 0.1 < 113.5 1
I.Phosphorous
P.11O) X 0.005 9.1 1 mg/I lb/Day < 0.005 `< 5.7 1
I.RadoatlMy
AlPt
(t) Toer X 1.1 X 1 pCl/I X < 0.17 X 1
(2)Beta,otal X 3.48 X 1 pCl/I X 2.62 X 1
(3)R.a
Total X < 1 < X 1 pCi/1 X < 1 X 1
(4)R clum
226,Total X < 1 < X 1 pCi/I X < 1 X 1
IL SUM.
(1(a4sSO4)a) X 5.76 10502.7 1 mg/I lb/Day 5.8 6580.1 1
I.Sulfide
(as S) X < 1 < 1823.4 1 mg/I lb/Day < 1 < 1134.5 1
fn.SIIIM
(1Sa S X < 1 < 1823.4 1 mg/I lb/Day < 1 < 1134.5 1
2$65I6o3)3)
n.Surfactants
X < 0.1 < 182.3 1 mg/I lb/Day < 0.1 < 113.5 1
a.Nuninum,00 al X 0.3 547.0 1 mg/I lb/Day 0.14 158.8 1
(7429-90-5)
p. Total X 0.02 36.5 1 mg/1 lb/Day 0.01 11.3 1
(744839-3)
41.
Total X 0.05 91.2 1 my/I lb/Day 0.03 34.0 1
(7440.42-)
r Cobalt,
abTotal X < 0.05 < 91.2 1 mp/1 lb/Day < 0.05 < 56.7 1
(7440-48-4)
s.tan,Total
(7439-19-6) X 0.42 765.8 1 mp/I lb/Day 0.29 329.0 1
t MageTom, X 1.1 2005.7 1
(7439-95-4) myll lb/Day 1.1 1248.0 1
u.Moybdram,Total X < 0.06 < 109.4 1 mg/I lb/Day < 0.06 < 68.1 1
(7439-9I1.7)
v.Manganese,
Total X 1.1 2005.7 1 mg/I lb/Day 0.002 2.3 1
(7439-96-5)
w.TM,Tar(7440.31-5) X < 0.5 < 911.7 1 mg/I lb/Day < 0.5 < 567.3 1
x.Titanium,Total X < 0.04 < 72.9 1 mg/I lb/Day < 0.04 < 45.4 1
(7440.32-6)
EPA Form 3510-2C(Rev.2-65) PAGE V-2 CONTINUE ON PAGE V-3

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved es
OMB No.2040-0086
CONTINUED FROM PAGE 3 OF FORM 2-C NC.0004961 Riverbend 001 Approval a1,paee7-31-88
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
acrolein,acrylonitrile,2,4 dinitrophenol,or 2-methy1-4,6 dinitrophenol,you must provide the results of at least one analysis for each of these pollutants which you know or have reason to
believe 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 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(all 7 pages)for each outfall.See instructions
for additional details and requirements.
1.POLLUTANT 2.MARK'X' 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AND CA NO. axe-
WI
cub- a.MAXIM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG FfkM AVG.VALUE a.LONG TERM AVG.VALUE
(II ) (I(available) in eve d.NO.OF a.Goner- b.Mass d.No.OF
sd (1)Conceraelen (2)Mess (1)Concentration (2)Mess (1)Concentration (2)Mess ANALYSES tration (1)Concentratlon (2)Mass ANALYSES
METALS,CYANIDE,AND TOTAL PHENOLS
/M.Alimony, X < 1 < 1.82 1 ug/l lb/Day < 1 < 1.13 1
Tow(7440-36-0)
2M.Amick.Tow X < 1 < 1.82 1 ug/l lb/Day < 1 < 1.13 1
17440.38-2)
3M.Beryeun, X < 0.5 < 0.91 1 ug/I lb/Day < 0.5 < 0.57 1
Toad(7440-41-7)
4M.Cadmkm, X 2.9 5.29 1 ug/I lb/Day 0.47 0.53 1
Tow(7440-43-9)
514.Chrankan, X 2.8 5.11 1
Tar(7440-47-3) ug/I lb/Day 2.4 2.72 1
6M.Copper,Tow X 0.04 72.94 1 mg/I lb/Day 0.02 22.69 1
17440,504)
7M.Load,Tom X 2 3.65 1 ug/l lb/Day < 2 < 2.27 1
(7439-92-1)
8M.Mercury,row X < 0.1 < 0.18 1 ug/1 lb/Day < 0.1 < 0.11 1
(7439-97-6)
9M.Nicks(Taw X < 2 < 3.65 1 than lb/Day < 2 < 2.27 1
17440 02-0)
10M.Selarhm, X 4.4 8.02 1 ug/I lb/Day 3 3.40 1
Tom(7782-49-2)
11M.SIMr,Tom X < 0.2 < 0.36 1
57440.221) ugll lb/Day < 0.2 < 0.23 1
12M.Thallum, X < 0.2 < 364.7 1 mg/I lb/Day < 0.2 < 226.90 1
Tom(7440-26-0)
13M.Zinc.Tom X 0.02 36.47 1 mg/1 lb/Day < 0.01 < 11.35 1
f7440a66)
14M.Cyrlda, X < 0.01 < 18.24 1 mg/I lb/Day < 0.01 < 11.35 1
Tow(57-12-6)
15M.Phonate, X < 0.01 < 18.2 1 mg/I lb/Day < 0.01 < 11.35 1
Tow
DIOXIN
2,3,7,8 Teta DESCRIBE RESULTS
&bradbsrao P X
Dioxin(1764-01.6)
EPA Form 3510-2C(Rev.2-05) PAGE V-3 CONTINUE ON PAGE V-4

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
OMB No.2040-0086
CONTINUED FROM PAGE V-3 NC.0004961 Riverbend 001
• Approval mires 7-31-08
1.POLLUTANT 2.MARK'X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AND CAS NO. ar► o.orr- cab- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If avaNaoN) 4w s r6 t sarR (If avalNDb) (n available) (If available) d.ra.OF a.Concen- b.Mass d.NO OF
ad (1)Cancartatlon (2)Mass (1)Concenaauon (2)Mau (1)Concentration (2)Mar ANALYSES tration (1)Cancenoauon j}Mass ANALYSES
GC/MS FRACTION-VOLATILE COMPOUNDS
1V.Amish X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
(107-02-0)
2V.Aayarr a* X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
(107-13-1)
3V.Barran X < 2 < 3.65 1 uy/I lb/Day < 2 < 2.27 1
(71-43-2)
4V.Bls(Crroro-
rnsV 1)Ewa` X X X 1 u0/1 lb/Day X X 1
(542-88-1)
5V.Bromoform X < 2 < 3.65 1 up/I lb/Day < 2 < 2.27 1
(75-25-2)
6V.Carbon
Tatactrortas X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
(56-23-5)
7V.Chlorceennons X < 2 < 3.65 1 up/I lb/Day < 2 < 2.27 1
(108-90-7)
8V.Moroa-
6rannrn.trn. X < 2 < 3.65 1 up/t lb/Day < 2 < 2.27 1
(124-48-1)
9V.arawtwia A < 2 < 3.65 1
(75-00-3) up/I lb/Day < 2 < 2.27 1
1 W.2-CIroro
ewyher14 Mar X < 2 < 3.65 1
(110-75-8) up/l lb/Day < 2 < 2.27 1
11v.Microform X < 5 < 9.12 1 uy/I Ib/Day < 5 < 5.b/ 1
(67-86-3)
12V.Otcboro-
moma elhana X < 2 < 3.65 1 up/1 lb/Day < 2 < 2.27 1
(75-27-4)
13V.Dlchloro
etL rananan. X < 2 < 3.65 1 up/I lb/Day < 2 < 2.27 1
(75 51-0)
14V.'Li-Okrrao 7C < 2 < 3.65 '1 WI- It/Day < 2 < 2.27 1
Mars(75-34-3)
1SV.1,2-Dichloro- X < 2 < 3.65 1 up/I -lb/Day < 2 < 2.27 1
Mars(107-062)
16V.t.t Dtaloro- A < 2 < 3.65 T uyl lb/Day < 2 < 2.27 1
awykrs(75-35.4)
17V.1.2-Okhbro- X < 5 < 9.12 1 uy/f lb/Day < 5 < 5.67 1
prams(78-87-5)
18V.1,3-D4cnoro- A < 2 < 3.65 1 VI lb/Day < 2 < 2.27 1
propping(542-75-6)
19V.EwytNaars A < 2 < 3.65
1Y < 2 < 2.27 1
(100-41-4)
2W.Malty X < 2 < 3.65 1 uy/I lb/Day < 2 < 2.27 1
Bron4de(74-039)
21V.Mawyl X < 2 < 3.65 1 uy/I lb/Day < 2 < 2.27 1
aralde(74-87-3)
EPA Form 3510-2C(Rev.2-85) PAGE V-4 CONTINUE ON PAGE V-5

EPA I.D.NUMBER(copy from dem 1 o1 Form 1) OUTFACE NUMBER Form Approved
CONTINUED FROM PAGE V-4 NC.0004961 Riverbend 001 OMB No.2040-0066
ApprovY cokes 7-31-88
1.POLLUTANT 2.MARK"X" 3.EFFLUENT 4.UNITS 5.INTAKEloptional)
AND CAS N)O. sire- tarte.g.- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
iri1�0 .ertl (K avelYble) (If awavailable)leble) (If available) d.NO.OF a.Concen- b.Mass d.NO OF
b (1)Canoera.8on I(2)Mess (1)Concerrtrion (2)Mess (1)Concenretlon (2)Mess ANALYSES (ration (1)Concaneallon (2)Mess ANALYSES
GC/MS FRACTION-VOLATILE COMPOUNDS(continued)
22V.Metylen. X < 5 < 9.12 1 up/t lb/Day < 5 < 5.67 1
Chloride(75-09-2)
23V.1,1,2,2-TeCa-
chloro.eere X < 2 < 3.65 1 u9/1 lb/Day < 2 < 2.27 1
(79-34-5)
24V.Teroro- X < 2 <
w 3.65 1 ugh Ib/Day < 2 < 2.27 1
etyiere(127-18-4)
25V.Toluene X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
(108-08.3)
26V.1,2-Trans-
(1Olchloroelhylens X < 2 < 3.65 1 u9/1 lb/Day < 2 < 2.27 1 •
27V.1,1,1-Ti-
aroro.rsne X < 2 < 3.65 1 u9/1 lb/Day < 2 < 2.27 1
(71-5'5-8)
28V.1,1,2-76
d+oro.rwe X < 2 < 3.65 1 up/I lb/Day < 2 < 2.27 1
(79-00-5)
29V.Trldroro- X < 2 < 3.65 1 ugh lb/Day < 2 < 2.27 1
Mylere(79-01.8)
30V.TrIchbro-
narcn.1hwr X < 2 < 3.65 1 uy/I lb/Day < 2 < 2.27 1
(754)
31V.Vinyl X < 2 < 3.65
1
CNor d.(75-01-4) lb/Day < 2 < Z.Z7 1
CC/MS FRACTION-ACID COMPOUNDS
1A.2-CNoropw,a X < 10 18.24 1 up/1 lb/Day < 10 < 11.35 1
(95-57-8)
2A 2,4-D1dtoro. X < 10 18.24 1 u971 lb/Day < 10 < 11.35 1
phenol(120 83-2)
3A 2,4-Dlmsrv4- X < 10 18.24
1 uy/I lb/Day < 10 < 11.35 1
pond(105.87-9)
4A 45-Drrro•0- X < TO 18.24 1 ugh lb/Day < 10 < 11.35 1
Cresol(534-52-1)
2-1)
50L 2.4-Driro- X < TO - 18.24 1 ugh lb/Day < TO < 11.35 1
phenol(51-28 5)
6A.2-Nltoph.no X < 10 18.24 1 - uy71 lb/Day < 10 < 11.35 1
(88-75-5)
'
7A 4-N rophen of X < 10 18.24 T uyll lb/Day < TO < 11.35 1
(10002-7)
BA P-CNoro-M- X < 10 18 24 1 uy71 lb/Day < 10 < 11.35 1
Cresol(59-50-7)
9A P«ro.deao• X < 10 18.24 1 uy/t lb/Day < 10 < 11.35 1
phenol(87-88-5)
10A.Phenol X < 10 18.24 1 up/I lb/Day < 10 < 11.35 1
(108.95-2)
11A.2,4,6-Tn-
dioropsrw4 X < 10 18.24 1 up/l lb/Day < 10 < 11.35 1
(88-062)
EPA Form 3510-2C(Rev.2-85) PAGE V-5 CONTINUE ON PAGE V-6

•
EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
CONTINUED FROM PAGE V-5 NC.0004961 Riverbend 001 ApprovalOMB e 7 31-88
1.POLLUTANT 2.MARK'X' 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AND CAS NO. bgar- ad.. a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE C.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If avelleble) (If avaNsde) (If available) (If available) d.NO.OF a.Concen- b.Mass d.NO OF
ad (1)Concentration I(2)Mau (1)Concentration (2)Mau (1)Concentrator) (2)Mass ANALYSES tratiOn (1)Concentration (2)Mass ANALYSES
GC/MS FRACTION-BASE NEUTRAL COMPOUNDS
1B.Acerapf*une X < 10 < 18.24 1 ugh Ib/Day < 10 < 11-.35 1
183-32-9)
28.Awrrpht 4sns X < 10 < 18.24 1
(��) uflA lb/Day < 10 < 11.35 1
38.Mittman, X < 10 < 18.24 - 1 ugh lb/Day < '10 < 11.35 1
(120.12-7)
48.Be.adne X < 50 < 91.18
(9247-5) NOTE 1 1 lb/Day < 50 < 56.73 1
NOTE 1
58.Baru(a) X < 10 < 18.24 1
( .`I" ugh lb/Day < 10 < 11.35 1
68.Brao(a) X < 10 < 18.24 1 WA lb/Day < 10 < 11.35 1
Pyrene(50-324)
78.3,4-Banco-
firorar*ana X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
(20599.2)
811.Baru 18.24
Payette(991 24-2) X < 10 < 1 upA lb/Day < 10 < 11.35 1
913.Reno(k)
Fkmrw*wr X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
(207-06-9)
108.Bis(2-Chor-
gayl X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
(111N -01.1)
118.Bls(2Lhao-
'
(e tM)4 X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
128.13Is(2-Cfsarnso-
(o'oz''�o;j X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
138.Bls(2-Et,NF
May) -7P X < 10 < 18.24 1 up/I lb/Day 25 28.36 1
148.4-Bromo.
(103) X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
158.Buy Bantyl X < 10 < 18.24 - 1 ug/ lb/Day '< 10 < 11.35 1
PF*slate(6548-7)
168.2-Choro-
'
nap*ale» X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
•
(91-58-7)
17B.4-Chao-
p M PFery X < 10 < 18.24 1
Ether(7005-72a) ughIblDay < 10 < 11.35 1
188.carys«r X < 10 < 18.24
(218-01-9) 1 uGA lb/Day < 10 < 11.35 1
19B.DNeento(a.h) '
Anrraorr X < 10 < 18.24 1 41 lb/Day < 10 < 11.35 1
(53-70-3)
208.1,2-Dk toro- X < 10 < 18.24 1 ugh lb/Day < 10 < 11.35 1
benzene(95-50-1)
I21B.1,3-Dld,lao- X < 10 < 18.24 1 uy/1 Ib/Day < 10 < 11.35 1
liorene(541-73-1)
EPA Form 3510-2C(Rev.2-65) PAGE V-6 CONTINUE ON PAGE V-7
NOTE 1:This compound amot be*carat*;urinated using EPA Monad 625;reported concentrations should be regarded as approdmasons.

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
CONTINUED FROM PAGE V-6 NC.0004961 Riverbend 001 OMB No.2040-0086
Approval
7-31-8a
1.POLLUTANT 2.MARK"X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AND CAS NO. ar4 b.pr. cab- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If evadable) 4r- aant sanl (n waNsble) (If evadable)
(If ) a NO.OF a.Concen- b.Mass d.No.OF
ad (1)Cancanhalon I(2)Mass (1)Concen talon (2)Mess (1)Concentration (2)Mass ANALYSES tration (1)Concentration (2)Mass ANALYSES
GC/MS FRACTION-BASE/NEUTRAL COMPOUNDS(continued)
beams(1 ) X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
238.3.101chloro-
(91-94-1) X < 10 < 18.24 1 up/l lb/Day < 10 < 11.35 1
248.DIeRry1
Pht+Ww X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
(8466.2)
258.DlmetrA -
Plauawr X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
(131-11-3)
268.DI-N-Buly1
Rasta% X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
(84-74-2)
278.lrr 12+�t4�-2 X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1
{ )
258.2.E-DIrtro- X < 10 < 18.24 1 up/1 lb/Day < 10 < 11.35 1
toluene(606.20.2)
296.
041
P1tw.r�µ X < 10 < 18.24 1 WA lb/Day < 10 < 11.35 1
(117-84-0)
308.1.2-Dlplxra0-
hrtazina
bar )(122.667) X < 10 < 18.24 1 up/l lb/Day < 10 < 11.35 1
31B.Fkloranna e X < 10 < . 18.24 1 uy/I lb/Day < 10 < 11.35 1
(20644-0)
328.Fkrorsn. X < 10 < 18.24
(86.73-7) 1 ugh lb/Day < 10 < 11.35 1
338.Nencnao X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
beams(118-74.1)
3413.Maur
(87a~ X < 10 < 18.24 1 up/1 lb/Day < 10 < 11.35 1
3513.NencHao-
cyc ane X < 10 < 18.24 1 up/l lb/Day < 10 - < 11.35 1
368.►1aad+oro. X < 10 < 18.24
enane(67-72-1) 1 up/I lb/Day < 10 < 11.35 1
378.trrdaq
(1.2,3td1)Pytana X < 10 < 18.24 1 uy/l lb/Day < 10 < 11.35 1
193
388.'soplorons X < 10 < 18.24 1 uy/l lb/Day < 10 < 11.35 1
178-59-1)
39B. +odsn• X < 10 < 18.24
1 up/I lb/Day < 10 < 11.35 1
(91-20.3)
408.NltrobaOane X < 10 < 18.24 1 VI lb/Day < 10 < 11.35 1
(98-95-3)
418.N-Nltro
562-7s-9 X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
428.N•Ndrosod-
1�propy � X < 10 < 18.24 1 up/I lb/Day < 10 < 11.35 1 I
(621$(-7)
EPA Form 3510-2C(Rev.2-65) PAGE V-7 CONTINUE ON PAGE V-8

EPA I.D.NUMBER(copy from item 1 of Form 1) OUTFALL NUMBER Form Approved
OMB No.20440086
CONTINUED FROM PAGE V-7 NC.0004961 Riverbend 001
r Approval sg:lree 7-31-88
H.POLLUTANT 2.MARK"X' 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
ANp CAS NO. ice- op cob a.M. IMU1uI DAILY VALUE b.M. (IMU�A 30 DAY VALUE c.LONITLAM AVG.VALUE a.LONG TERM AVG.VALUE
.wXolsl QIr- s6ri .rK (n.w�etile) (n awlbbe) d.NO.OF a.Concert- b.Mass d.NO.OF
ad (1)ConcerWatlan I(2)Mau (1)Concentration (2)Meu (1)Corkwaallon (2)Mau ANALYSES tration (1)Concentration (2)Mau ANALYSES
GC/MS FRACTION-BASE/NEUTRAL COMPOUNDS(continued)
438.N-Nifo -
wapheryrrina X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
( 30•61
448.Pronsiehrene X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
(83.01-8)
458.Pyren. X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
(129-00-0)
46B.1,2,4-Trt.
ciioroba rren. X < 10 < 18.24 1 uy/I lb/Day < 10 < 11.35 1
(120-82-1)
GC/MS FRACTION-PESTICIDES
1P.AWM X
309-00-2)
2P.ash.-BNC X
(319-84-6)
3P.beta-8HC X
(315.85.7)
4P.prm.-BHC X
(58--89-9)
5P.delttBHC X
(319 86 8)
6P.chorderr X
(57-74-9)
7P.4.4'-DOT X
(50-29-3)
8P.4,4'-DDE X
(72-55-9)
9P.4,4'-DOD X
(72-54 8)
10P.Olaldrin X
(60-57-1)
11P.apha-Endow f.n X
(115.29-7)
12P.bete-Endoarlfen X •
(115-29-7)
13P.EndoaNan
Sulfate X
(1031-07-0)
14P.En?M X
72-20-8)
15P.Entrin
Aldehyde X
(7421-93-4)
16P.Heptachlor X
(76-44-8)
EPA Form 3510-2C(Rev.2-86) PAGE V-0 CONTINUE ON PAGE V-9

EPA I.D.NUMBER(copy from Bern 1 o(Form 1) OUTFALL NUMBER Form Approved
OMB No.2040-0086
CONTINUED FROM PAGE V-8 NC.0004961 Riverbend 001 Approval lres7-31-88
1.POLLUTANT 2.MARK"X" 3.EFFLUENT _ 4.UNITS 5.INTAKE(optional)
AN(�CA$NO. ar« n.pr c.a- a. IMUtyt DAILY VALUE b.MP��CIMymt 30 DAY VALUE c.LOG F M AVG.VALUE a.LONG TERM AVG.VALUE
(rt awMeble) 41r aMR fwR lrt ewlkbb) lrr e'raaawe) d.NO.OF a.Concen- b.Mass a.No.OF
_ ea (1)Concerrtalon I(2)Mau (1)Concentration (2)Mess (1)Concerrtalon (2)Mau ANALYSES tration (1)Corgerbatlon (2]Meu ANALYSES
GC/MS FRACTION-PESTI
17P.Heptachlor
Epoxide X
(1024-57-3)
18P.PCB-1242 X •
(53469-21-9)
19P.PCB-1254 X
S11097-69-1)
20P.PCB-1221 X
(11104-262)
21P.PCB-1232 X
S11141-165)
22P.PCI61248 X
(12672-29 6)
23P.PCB-1260 X
(11096-02-5)
24P.PCB-1016 X
(12674-11-2)
25P.ToxapMne X
(8001-35-2)
EPA Form 3510-2C(Rev.2-85) PAGE V-9

PLEASE PRINT OR TYPE IN THE UNSHADED AREAS ONLY. You may report some or all of EPA I.D.NUMBER(copy from Item 1 of Form 1) Form Approved
this information on separate sheets(use the same format)instead of completing these pages. OMB No 2040-0086
SEE INSTRUCTIONS NC0004961
Approval expires 7-31-88
K�,..• lR��!w...Mw•:ii ii ,,,.w....ywni,1A
.INTAKE AND EFFLUENT CHARACTERISTICS(continued from page 3 of Form 2-C) ;` '} ` " . '""�� " '•'�'` •1 "" ' OUTFACE NO.
\�\ t,�� ;�a. �' � `4 AtA Riverbend o02
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.INTAKE o.iona
1.POLLUTANT a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(If available) (If available) d.NO.OF a.Conan- b.Mess b.NO.OF
(1)Concentration (2)Mass (1)Concentration (2)Mass (1)Cancar*alon (2)Mass ANALYSES talon
(1)Cancentalon (2)Mass ANALYSES
a.Biochemical Oxygen 0.4 22.6 1 mg/I lb/Day 0.4 453.8 1
Demand(BOO)
I b.Chemical Oxygen < 10 < 564.1 1 mg/1 lb/Day < 10 < 11345.0 1
Demand(COD)
c.Toed Organic 1.3 73.3 1 mg/I lb/Day 2 2269.0 1
Carbon(TOC)
d.Toll Suspended 33 1861.6 1 mg/I lb/Day 8 9076.0 1
Solds(TSS)
e.Ammonia(as N) < 0.05 < 2.8 1 mg/I lb/Day < 0.05 < 56.7 1
I•now VALUE VALUE VALUE MGD X VALUE
6.76 1 CR 135.95 CR
•.Tenperatee VALUE VALUE VALUE VALUE
(wirier) 7.3 DEGREES CELSIUS 7.5 1
.Temperature VALUE VALUE VALUE VALUE
(simmer) DEGREES CELSIUS �`
•pH MINIMUM MAXIMUM MINIMUM MAXIMUM +''{�'„\ ���`,? ` :\ �':� '•\` \:`c`:Z:`: :�: i:\;;1`)``�`'.:� _`2:\`\i:�-; `•` `\
7.97 ia.tiids • kb. ; A is 1 STANDARD UNITS :iz itigg .igik.`: • ,!,k, :.k,.�i:��2ia�g
PART B-Mart"X"In column 2a for each 'pollutant you know or have reason to believe is present.Mark'X'in column 2b 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.
1. POLLUTANT 2.MARK X 2.EFFLUENT 3.UNITS 4.INTAKE(optional)
AND CAS NO. a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(It available) a.pre- b.eb
(It available) Of ) d.NO.OF a.Conurh- D.Maas D.NO.OF
seri sent (1)Concentelon (2)Mass (1)Concsnta$on (2)Mass �(1)Concentelon (2)Mass ANALYSES talon (1)Concentalon (2)Mass ANALYSES
a.Bromlde X < 1.2 < 67.7 1 mg/I lb/Day < 1.2 < 1361.4 1
1 (24959-67-9)
criortw, X < 0.5 < 28.2 1 mg/I lb/Day < 0.5 < 567.3 1
Total Residua
c.Color X 7.5 X 1 Std.Units X 10 X 1
d.Fecal X 23 X 1 Colonies X 4 X 1
Conorm
/100 mil
e.Flande X 0.17 9.6 1 mg/I lb/Day < 0.1 < 113.5 1
1 (16964/8-8)
.Wale- X 0.35 19.7 1 mg/I lb/Day 0.36 408.4 1
Wile(as N)
EPA Form 3510-2C(Rev.2-65) PAGE V-1 CONTINUE ON PAGE V-2

EPA I.D.NUMBER(copy from Bern 1 of form 1) OUTFALL NUMBER Form ApproVed
ITEM V-B CONTINUED FROM FRONT NC0004961 Riverbend 002 OMB No.20440086
Approval avkes 7-31-86
1.POLLUTANT 2.MARK x 3.EFFLUENT 3.UNITS 4.INTAKE(optional)
ANRoUteril0. a D.aD ava
a.MAXIMUM DAILY VALUE b.M/lielHUI 30 DAY VALUE c.LOInveTSAM AVG.VALUE a.LONG TERM AVG.VALUE
pre
d.NO.Of a.Calcan D.Mass D.NO.OF
sent sent (1)Concert/slat (2)Matt (1)Concentration (2)Mass (1)Concentration (2)Matt - ANALYSES talon (1)Concentration (2)Matt ANALYSES
9."'TOW Organic X 0.25 14.1
(as N) 1 m9l1 lb/Day < 0.4 <
453.8 1
It Oil and
Orease X < 0.1 < 5.6 1 mg/I lb/Day < 0.1 < 113.5 1
I.Phosphorous
((as Pi 14.0)Told X 0.04 2.3 1 m9/I lb/Day < 0.005 < 5.7 1
(772
I.RedoactMy
(1)WeYour X 1.04 X
1 pC1/I X < 0.2 X 1
(2) Tot X 6.9 X
1 pCl/I X 2.6 X 1
(3)Radar'', X <
1 X 1 pCi/I X < 1 X 1
(4)Radom
226,Tow X < 1 X
1 pCUI X < 1 X 1
Ic Sulfate
(1(as�) X 42 2369.3 1 m9/l lb/Day 5.8 6580.1 1
I.Sulfide
(u s) X < 1 < 56.4
1 rr19/I lb/Day < 1 < 1134.5 1
mS(flaes
(1426545)3) X < 1 < 56.4 1 m9/I lb/Day < 1 < 1134.5 1
n.Srfactara
X < 0.1 < 5.6 1 rn9/I lb/Day < 0.1 < 113.5 1
1.26 71.1 1 mg/1 lb/Day 0.14 158.8 1
o.
(742 Total 5) X
p.B(7440-39-3)Total X 0.09 5.1 1 m9A lb/Day 0.01 11.3 1
4o Tow X 0.21 11.8 1 m9/I lb/Day 0.03 34.0 1
(7440-424)
-
r.Cobalt,
ToW X < 0.05 < 2.8 '
(744w8-4) 1 m9/I lb/Day < 0.05 < 56.7 1
s.Man,Tot
(7439-E9-6) X 0.67 37.8 1 mg/I lb/Day 0.29 329.0 1
(M )Total X 1.6 90.3 1 m9/I lb/Day 1.1 1248.0 1
u.Maybdersan,
(7439484)otal X 0.08 4.5 1 m9/1 lb/Day < 0.06 < 68.1 1
v.Manganese,
(7 T139-996-5)otal X 0.04 2.3 1 mg/I lb/Day 0.02 22.7 1
w.Tin,Tow
(7440-31-5) X < 0.5 < 28.2 1 mg/I 'lb/Day < 0.5 < 567.3 1
1t.nankin,
Total
(7440-32-6) X 0.09 5.1 1 mg/I lb/Day < 0.04 < 45.4 1
EPA Form 3510-2C(Rev.245) PAGE V-2 - CONTINUE ON PAGE V3

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
• OMB No.2040-0086
CONTINUED FROM PAGE 3 OF FORM 2-C NC0004961 Riverbend 002 Approve attires 7-31-88
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.Mart"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
acrolein,acrylonitrile,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
believe 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 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(all 7 pages)for each outfall.See instructions
for additional details and requirements.
1.POLLUTANT 2.MARK'X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AN NO. 'to. o.p. cabal a.MAXIMUMDAILY VALUE b.MAXIMUM 30 DAY VALUE c.LOtaILI M AVG.VALUE a.LONG TERM AVG.VALUE
(If a s) 4tir- aam sent (H a ) available) ) d.No.Of a.Concen- b.Mass d.No.OF
ed (1)conainvoBon (2)Mass (1)Concentration (2)Mass (1)Concenta8on (2)Mass ANALYSES tratlon (1)Concentretfan (2)Mass ANALYSES
METALS,CYANIDE,AND TOTAL PHENOLS
1M.Antinomy, X 1.5 0.08 1 ug/I lb/Day < 1 < 1.13 1
Total(7440-36-0)
2M.Amebic.Total X 44 2.48 1 ugh lb/Day < 1 < 1.13 1
(7440-38-2)
3M.Barysun, X < 0.5 < 0.03 1 ug/I lb/Day < 0.5 < 0.57 1
Total(744041-7)
4M.Cadmium, X 2 0.11 1 ug/I lb/Day 0.47 0.53 1
Tolsl(7440-43-9)
5M.Crecenl sn. X 7.2 0.41 1 ug/I lb/Day 2.4 2.72 1
Total(7440.47-3)
6M.Capper,Total X 0.03 1.69 1 mg/I lb/Day 0.02 22.69 1
(7440-50-8)
7M.Lead,Total X 4.1 0.23 1 ug/I lb/Day < 2 < 2.27 1
(7439.92-1)
8M.Mercuy.Tar X < 0.1 < 0.01 1 ug/l lb/Day < 0.1 < 0.11 1
(7439-97-6)
9M.Nickel,Total X 9.6 0.54 1 ug/I lb/Day < 2 < 2.27 1
(7440-02-0)
10M.selr4u7. X 3.2 0.18 1 ug/I lb/Day 3 3.40 1
Tot(7782-49-2)
11M.Sew.Total X < 0.2 < 0.01 1 ug/I lb/Day < 0.2 < 0.23 1
(7440.22-4)
12M.Pullen X < 0.2 < 11.3 1 mg/I lb/Day < 0.2 < 226.90 1
Total(7440-28-0)
13M.2Lu,Total X 0.02 1.13 1 mg/I lb/Day < 0.01 < 11.35 1
(7440.66-6)
14M.Cyar1ds, X < 0.01 < 0.56 1 mg/I lb/Day < 0.01 < 11.35 1
Total(57-12-5)
15M.Phenols. X < 0.01 < 0.6 1 mg/I lb/Day < 0.01 < 11.35 1
Total
DIOXIN
2.3.7.8 Teta DESCRIBE RESULTS
aioroao«¢o P X
olaen(1764-01.6)
EPA Form 3510-2C(Rev.2-85) PAGE V-3 CONTINUE ON PAGE V-4

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
OMB No.20440086
CONTINUED FROM PAGE V-3 NC0004961 Riverbend 002
Approval expires 7-31-88
1.POLLUTANT 2.MARK"X' 3.EFFLUENT 4.UNITS 5.INTAKE(optional) -
AND CAS NO. ;lire: ix:- cab- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(n avallabla) gnlr- s6rl sarrt (n wweble) Of available) Of available) d.NO.OF a.Concen- b.Mass O.NO.OF
ea (1)Concentration (2)Mass (1)Concenraion (2)Mass (1)Cementation (2)Mass ANALYSES tration (1)Concentration (2)Mass ANALYSES
GC/MS FRACTION-VOLATILE COMPOUNDS
1V.AaoMrn X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(107-02-0)
2v.Acrylcritle X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(107-13.1) .
3V.Bergen* X < 2 < 0.11 1 up/I lb/Day < 2 < 2.27 1
171-43-2)
4V.Bis(Ctloro
ms9 tf)Erna X X X 1 than lb/Day X X 1
(542 88-1)
5V.Brarnofonn X < 2 < 0.11 1 uy/I lb/Day < 2 < 2.27 1
(75-25-2)
6V.Carbon
Tetrachloride X < 2 < 0.11 1 up/I lb/Day < 2 < 2.27 1
(56-23-5)
7V.Crrorobereen* X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
(106-90-7)
8V.°Scrod-
brom ms9 sne X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
(124-461)
9V.Chloroernne X < 2 < 0.11 1 ugh) lb/Day < 2 < 2.27 1 '
(75-00-3)
10V.2-Chloro
ell ytdrryl Sher X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
(110-75-8)
11V.Chloroform X < 5 < 0728 1 ugh lb/Day < 5 -< 5.67 1
(67-66-3)
12V.( chlo o
brarwmirrr X <
2 < 0.11 1 ug/I lb/Day < 2 < 2.27 1
(75-27-4)
13V.Oldioro-
druoromelhane X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
(7S-51-0)
14V.1.1-DlcMoro• X < 2 < 0.11 1 ugh < 2 < 2.27 1
atom(75-34-3) 16lD8y
15V.1,2-Diasoro- X < 2 < 0.11 1 ugh lb/Day < 2 < 2 27 1
atone(107-06-2)
16V.1.1-OldEro X < 2 < 0.11 1 ugh < < 2.2/ 1
at lyiene(75-36-4) lb/Day
17V.1.2-Didloro- X < 5 < 0.28 1 3 < 5.67 1
ugh lb/Day <
propane(78-87-5)
18V.1.3-Dknao X < 2 < 0.11 1 ug/I lb/Day < 2 '< 2727 1
propylene(542-75-6) •
19V.Eirybaaane X < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
5100-41-4)
20V.Meryl X < 2 < 0.11 1 ug/I lb/Day < 2 < 2.27 1
Bronid.(74-83-9)
21V.Meryl X < 2 < 0.11 1 ug/I lb/Day < 2 < 2.27 1
Chloride(74-67-3)
EPA Form 3510-2C(Rev.2-85) PAGE V4 CONTINUE ON PAGE V-5

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
OMB No.2040.0386
CONTINUED FROM PAGE V-4 NC0004961 Riverbend CO2 Approval expires 7-31-88
1.POLLUTANT 2.MARK"X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AND CAS NO. son: h. c.eo- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE -
It a ble) Wr unf (If avalteblel (If available) (If available) d.NO.OF a.Concon- b.Mass I.NO.OF
ed (1)Concert/don I(2)Mau (1)Concentabon (2)Mau (1)Ccnca Callon (2)Mau ANALYSES fruition (1)Concentration (2)Mess ANALYSES
GC/MS FRACTION-VOLATILE COMPOUNDS(continued)
22V.Melrywn X < 5 < 0.28 1 uy/I lb/Day < 5 < 5.67 1
Chloride(75-09-2)
23V.1,1,2,2-Telra-
worootnne X < 2 < 0.11 1 uy/I lb/Day < 2 < 2.27 1
(79.34-5)
24V.TetacMoro- X < 2 < 0.11 1 uyi lb/Day < 2 < 2.27 1
ethylene(127-18-4)
25V.Toluene X - < 2 < 0.11 1 ugh lb/Day < 2 < 2.27 1
(10883)
26V.1.2-Trann-
Dlalwrostilsn X < 2 < 0.11 1 up/I lb/Day < 2 < 2.27 1
(156-80-5)
27V.1,1,1-Tn-
cnoroelan X < 2 < 0.11 1 up/I lb/Day < 2 < 2.27 1
(71-55. )
28V.1,1,2-TA-
dioroelen X < 2 < 0.11 1 up/I lb/Day < 2 < 2.27 1
(79-00-5)
29V.'frkfioro- X < 2 < 0.11 A T ugh lb/Day < 2 < 2.27 1
e rylarn(79-01-6)
30V.Trldloro-
ilwrornel ana X < 2 < 0.11 1 Will lb/Day < 2 < 2.27 1
(754 9-4)
31V.vlrryl X < 2 < 0.11 - T A ugh Ili/Day < 2 < 2.27 1
Chloride(75-01-4)
GC/MS FRACTION-ACID COMPOUNDS
1A.2-Chlorophend X < 10 0.56 1 uy/I lb/Day < 10 < 11.35 1 {
(95.57.8)
2A 2,4-0latioro- X < 10 0.56 1 uy/I A 1b7Day < 10 -< 11.35 ' 1
phenol(120-83-2)
3A 2,4-Dhnetryl- X < 10 0.56 1 uy/1 Ib/Day < TO < T1.35 1
phenol(105-67-9)
4A 4,6-D1rno-0- X < 10 0.56 T up/I lb/Day < TO < 11.35 1
Cresol(534-52-1)
5A.2,4-Dlnlao- X < 10 0.56 1 ugh lb/Day < 10 < 1-1.35 1
pherol(51-28-5)
6A.2-Nltophenol X < 10 0.56 1 Will lb/Day < 10 < 1T.35 1
(88-75-5)
7A.4-Nnapherol X < 10 0.56 1 uy/1 lb/Day < 10 < T1.35 1
(100-02.7)
8A.P-a,wro-M- X < 10 0.56 1 WI lb/Day < 10 < 11.35 1
Cresol(59-50-7)
9A.P«Aechloro- X < 10 0.56 1 up/1 lb/Day < 10 < 11.35 1
plena(87.86-5)
10A.Phenol X < 10 0.56 1 uy/1 lb/Day < 10 < 11.35 1
(108-95-2)
11A.2,4,6-Tri-
ararnpleal X < 10 0.56 1 up/I lb/Day < 10 < 11.35 1
(88-06-2)
EPA Form 3510.2C(Rev.2-85) PAGE V-5 CONTINUE ON PAGE V-B

EPA I.O.NUMBER(copy from Item 1 of Form 1) OUTFACE NUMBER Form Approved -
0-0086
CONTINUED FROM PAGE V-5 NC0004961 Riverbend 002 OMBNo.204es7-3
Approval expires7-31-88
1.POLLUTANT 2.MARK*X" 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AND CAS NO. a.r. b.pr c.ab- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG T7ERM AVG.VALUE a.LONG TERM AVG.VALUE
(M avatsds) q. - sMt` sent (M avatab e) {If av ilable) (H evafabls) d.NO.OF a.Concen- b.Mass d.NO.OF
ad JJ Concentration 1(2)Mass S1)Conceraaton (2)Mass (l Genet aton y Mass ANALYSES , tration (I)Cancenfaron SZ)Mass ANALYSES
GC/MS FRACTION-BASE NEUTRAL COMPOUNDS
18.Acenap►nwn X < 10 < 0.56 1 ugil lb/Day < 10 < 11.35 1
(83-32-9)
28.Acsnepht l.ns X < 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
(208-96-8)
38.Antracane X < i0 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(120-12-7)
48.Bersddne X < S0 < 2.82 1 uy/l lb/Day < 50 < 56-.73 1
(92-07-5) NOTE 1 NOTE 1
58. 0(or)tiglar X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
68.Benz*(a) X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
Pyrane(50-32-0)
78.3,48enzo-
I orenlhww X < 10 < 0.56 1 WO lb/Day < 10 < 11.35 1
S2o6.99.2)
88.Berge(01) X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
Parylens(191-24-2)
98.Barzo(k)
Fluoranrrn. X < 10 < 0.56 1 uy/( lb/Day < 10 < 11.35 1
(207-08-9)
108.Bls(2-Chbro
erwzN)Metwne X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
(111-991-t)
11B.Ells.rry1)Ether o-
X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(111-44-4)
128.Bls(2-Chlordso-
(102 60 ttj X < 10 < 0.56 1 up/I lb/Day < 10 < 11.35 1
138.Bls(2-Eth4-
r281-7 ls X < 10 < 0.56 1 ugh lb/Day 25 28.36 1
148.4-Bromo-
that Intl
Pphhs�r� X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
158.B O Bear5-3 < 1D -< 11.35 1
158.Butyl Banzyl X < 10 < 0.56 1 ugh lb/Day
Phtukte(8568.7)
168.2-Chbro-
raphtwens X < 10 < 0.56 1 up/I lb/Day < 10 < 11.35 1
f91Sb7) .
178.4CYloro-
phenyl Phenyl X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
Eter(7006-72-3)
188.Clry5.ns X < 10 < 0.56 1 ug/l lb/Day < 10 < 11.35 1
(218-01-9) ,
198.Olbenzo(a))
Anteacane X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(53-703)
208.1,2-OlcNoro- X < 10 < 0.56 1 ug/l It/Day < 10 < 11.35 1
benzene(95-50-1)
218.1,3-E cNoro- X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
benzene(541-73-1)
EPA Form 3510-2C(Rev.2-85) PAGE V-6 CONTINUE ON PAGE V-7
NOTE 1:TNs corrpou+d cannot be accurately quanatabd using EPA Method 625;reported concer*aboru shorld be regarded as approdmetlons. ,

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Fors Approved -
CONTINUED FROM PAGE V-6 NC0004961 Riverbend 002 AAppprrowexptees731-88
1.POLLUTANT 2.MARK"X' 3.EFFLUENT 4.UNITS 5.INTAKE(optional)
AND CAS NO. •se b.pt c..- a.MAXIMUM DAILY VALUE b.MAXIMUM 30 DAY VALUE C.LONG TERM AVG.VALUE a.LONG TERM AVG.VALUE
(M ava/abte) gilt- WI sett (If evaltebte) (If awllable) (If available) d.NO.OF a.Concert b.Mass d.NO.OF
ed (1)Concenta/on I(2)Mau (1)Cancentallon (2)Mau (1)ConcaAa/on (2)Mass ANALYSES tration (1)Concenbrion (2)Mess ANALYSES 1
GC/MS FRACTION-BASE/NEUTRAL COMPOUNDS(continued)
228.1,4-D4cr+oro• X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
benzene(106-46-7) -
byli• ne o-
X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(91-94-1)
248.DlsOryl
PlRrtete X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(84-662) ,
tal
Prirwe• �a X < 10 < 0.56 1 ugA lb/Day < 10 < 11.35 1
1131-11-3)
Proirlte Buryt
P X < 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
(84-74-2)
278.2,4-0intra X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
toluene(121-14-2)
288.2,6-01nito- X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
'toluene(606-20-2)
Phialls% X < 10 < 0.56 1 ugA lb/Day < 10 < 11.35 1
1117-040)
a riu aai'�m X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
be rrcene)I122-067)
318.Fworantrwu X < 10 < 0.56 1 41 lb/Day < 10 < 11.35 1
120644-0)
328.Fbrorene X < 10 < 0.56 1 uy/I lb/Day < 10 < 11.35 1
(6673.7)
338.Naractioro- X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
benzene(11674-1)
34B.Neim-
droroa,sa«n X < 10 < 0.56 1 ugh lb/Day < 10 < 11.35 1
(67-0a-3)
a
c cydopxae .ns X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(77.47-4)
368.Nuted/oro- X < 10 < 0.56 1 up/1 lb/Day < 10 < 11.35 1
atone(87-72-1) .
37B.Mono
93
.2.3t39d1 Pyruw X < 10 < 0.56 1 up/l lb/Day < 10 < 11.35 1
1d)
368.Isophorrnn X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(7669-1)
398.Nepnhalens X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(91-20-3)
408.Nitobsntene X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
19o-95-3)
418.N-Nlro-
X < 10 < 0.56 1 ug/I lb/Day < 10 < 11.35 1
(62-75 9
428.N•Nitosoo- < 10 < 11.35 1
X < 10 . < 0.56 1 uyl lb/Day
1 .
EPA Form 3510-2C(Rev.2-65) PAGE V-7 CONTINUE ON PAGE V-0

EPA I.O.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER FormApproved -
CONTINUED FROM PAGE V-7 OMB No.2040-0086
NC0004961 Riverbend 002 Approve mires 7 31-88
1.POLLUTANT 2.MARK"X" 3.EFFLUENT 4.UNITS AND CAS NO. ar � c b a.MAXIIMM 1 A DAILY VALUE b.MAXIMUM 30 DAY VALUE c.LONG TERM AVG.VALUE N.INTAKE(optional).VA
�(If (If"" (Ifs �) a.NO. a.Concen- b.Mass a.LONG TERM AVG.VALUE
ad (1)Concentatlan l(2)Matt A.NO.OF
(i)Concantre/an (2)Mass ar�a
(1)Conpon (2)Mass ANALYSES tratiOn (1)Cancanrtllar (2)Mass ANALYSES
'GC/MS FRACTION-BASElNEUTRAL COMPOUNDS(continued)
43B.N-Nlro-
sodphen4misna X <
(86-30-6) 10 < 0.56 1 ugh! lb/Day < 10 < 11.35 1
44B.Phenant ens X <
(85-01.8) 10 < 0,56 1 ugh' lb/Day < 10 < 11.35 1
P
456. yrena X <
458. 10 < 0.56 1
up/l lb/Day < 10 < 11.35 1
468.12,4-T1n-
chlorob.ntene X < 10 < 0.56
(120-82-1) 1 uy/I lb/Day < 10 < 11.35 1
GC/MS FRACTION-PESTICIDES
1P.Meln X
(309.00-2)
2P.l 4ts-BHC X
(319-84-6)
3P.Geh-BHC X
•
(315-85-7)
4P.parmr-BHC X
(58-89-9)
5P.delta-BHC X -
(319-86-6)
6P.Cnlordana X
S57-74.9)
7P.4.4-DDT X
(50.29-3)
8P.4,/'-DOE X
(72-55-9) '
9P.4,4'-DOD X
(72-54-8)
10P.Dlabin X -
S60-57-1)
I1P.agha-EndoarNan X - -
1115.29-7)
12P.bs -EndoaMan X
(115-29-7)
13P.Endoataan
SUM. X
(1031-07-8)
14P.EMrIn X
(72-20-8)
15P.Entrin
Aldehyde X
(7421-93-4)
16P.Heptachlor X
, 76-44-8)
EPA Form 3510-2C(Rev.2-66) PAGE V-8
CONTINUE ON PAGE V-9

EPA I.D.NUMBER(copy from Item 1 of Form 1) OUTFALL NUMBER Form Approved
OMB No.2040-0086
CONTINUED FROM PAGE V-8 NC0004961 Riverbend 002 Approval expires 7-31-88
1.POLLUTANT 2.MARK*X" 3.EFFLUENT _ 4.UNITS 5.INTAKE(optional)
AN(9M1 NO. c.- a.M/y(j DAILY VALUE b.MfgAsystV0 DAY VALUE c.L0112.14M AVG.VALUE a.LONG TERM AVG.VALUE
d.No.of a.Concen- b.Mass d.NO.OF
ad (1)Concetwdon I(2)Mass (1)Concertta9on (2)Mass (1)Concsn9-Son (2)Mass ANALYSES tration (1)Concentratbn (2)Mess ANALYSES
GC/MS FRACTION-PESTI '
17P.Heptadior
Epordds X
(1024-57-3)
18P.PCB-1242 X
(53469-21-9)
19P.PCB-1254 X
(11097-69-1)
20P.PCB-1221 X
(11104-28-2)
21P.PCB-1232 X
(11141-165)
22P.PCB-1248 X
(12672-29-6) -
23P.PCB-1260 X
(1109682-5)
24P.PCB-1016 X
(12674-11-2)
25P.Toaaphana X
(8001-35-2)
EPA Form 3510.2C(Rev.2-85) PAGE V-9

SUAL. 1:L4 UUU
1 1 0 1 MILE
2
1000 0 1000 2000 3000 4000 5000 6000 7000 FEET
F-4 I-1 • 1 1 I I -1 I 1 1
1 .5 0 1 KILOMETER
I
CONTOUR INTERVAL 10 FEET
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FIGURE 1 USGS TOPOGRAPHIC MAP OF THE AREA
AROUND RIVERBEND STEAM STATION

VA -- � _
��
. ii
002 )fkIC K
�♦♦, A , ASH BASIN
►♦♦ 1 _ \ SECONDARY CELL .\�\ I 1 !�
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40,
♦♦♦.• / COAL PILE I1
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, WA'EHOUSE
. \` _ S C ALE IN FEE 7.
C.SEWAGE 1\ •
TREATMENT ��, Q 111 L E G E N D
PLANT ik \5 ❑ 001 PLANT DRAINAGE
,.�, POWERHOUSE t DISCHARGE POINTS
COMB.R ���
TURBINES �O
❑ 0( SWITCHYARD I _ OISCHARGE CANAL
DISCHARGE POINTS
a '1 r DISCHARGE NC. S OURCE
FUEL os..IL r , br c.c... DISCHARGE CANAL
STORAGE 1 I ( 1 002 ASH BASIN DISCHARGE
TANK SUBSTATION
• D U K E P O W E R C 0 M P A N Y
(7.. ....__L_\\7:,...."./:N.
\ )
RIVERBEND STEAM STATION
‘\, ) '•\,,,
I) , ,
/ \ —N NPDES DISCHARGE POINTS
/\ _ ;, \\

NPDES •
Supplemental Information
for
Riverbend Steam Station

NC #0004961 Permit Renewal Application
May 23, 1994
Page 1 of 18
General Information
Riverbend Steam Station (RSS) is a coal-fired electric generating plant
operated by Duke Power Company. RSS is located on NC 16 at Mountain
Island Lake, six miles northeast of Mount Holly, North Carolina. The station
derives its name from the fact that it was built at a bend in the Catawba
River.
Riverbend's first three generating units, constructed before World War II,
were retired in the late 1970s. Units 4 and 5, each capable of generating
94,000 kilowatts of electricity, began operation in 1952. Units 6 and 7,
rated at 133,000 kilowatts apiece, started service in 1954.
In addition to the coal-fired units, four combustion turbines supply 30,000
kilowatts each for use during periods of extremely high or peak demand for
electricity. Combustion turbines operate a little differently from steam
plants. They burn oil or natural gas to heat compressed air, which expands
and drives a turbine-generator to produce electricity. The Riverbend
combustion turbine units were installed in 1969.
Duke Power created Mountain Island Lake in 1923 with the construction of a
dam across the Catawba River to provide water power for the Mountain
Island Hydroelectric Station. Riverbend was constructed on this lake since
steam electric generating facilities require large quantities of cooling water.
A line drawing showing the water flow through RSS is on the next page. It
indicates sources of intake water, operations contributing to the effluent, and
treatment provided. The approximated flows on the line drawing are
representative of station operation for the period of 2/93 - 3/94. RSS has
recently undergone an extensive Plant Modernization Program (PMP) that
was completed February 1993. Following the line drawing is a brief
narrative description of sources contributing to each outfall effluent.
Supplemental Information

LINE DRAWING OF WATER FLOW THROUGH RIVERBEND STEAM STATION NCx0004961 Permit Appl.
May 23, 1994
COUNTY: GASTON STATE: NC Page 2 of 18
INTAKE TUNNEL FROM CATAWBA RIVER
INDUCED DRAFT FAN COOLING 0.15 MCD STORM WATER FROM ROOF DRAINS
335 MGD WATER AND PAVING
HO
0.01 MCD
PIINTAKE SCREEN BACKWASH
PREHEATER BEARING COOLING 0.15 MGD -
WATER
INDUCED FAN&PREHEATER 0.03 MGD GROUNDWATER REMEDIATION
BEARING COOLING WATER OIL/WATER SEPARATOR
DRINKING WATER SYSTEM 0.023 MGD
(GROUND WATER) STORM WATER FROM COAL PILE
PLANT CHILLER SYSTEM 0.05 MGD TRACK HOPPER SUMP
(GROUNDWATER)
GENERAL PLANT/TRAILER SANITARY
101
WASTEWATER
TURBINE LUBE OIL COOLERS ASH REMOVAL SYSTEM
0
3 MGD
LABORATORY DRAINS - -
Ali I
BA MGD
CONDENSATE COOLERS III.
YARD DRAIN SUMP
1 CHEMICAL MAKEUP TANKS AND A A
DRUMS RINSATE
EXHAUST STEAM CONDENSERS -
IF
SANITARY SYSTEM
0.006 MGD
INTAKE TUNNEL UNWATERING SUMP
I MGD
TURBINE ROOM SUMPS
FILTERED WATER AND ASH
REMOVAL SYSTEM :1 BOILER ROOM SUMPSIli V
ASH BASIN
T
1.3 MGD
A
lir
I ^ DEMINERALIZER SYSTEM STORM WATER FROM POND AREAS EVAPORATION
AND UPGRADIENT WATERSHED 0.31 MGD AND SEEPAGE
I MGD
FILTERED WATER SYSTEM
0.004 MGD
I
PO GRAVITY FILTER BACKWASH AND 0.004 MCD
,
CLARIFIER SLUDGE OLD END PIT SUMP
002 (5 MGD)
001
MOUNTAIN ISLAND LAKE
(3 9 MGD)
Flows are approximated averages which have wide variability on a daily basis. Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 3 of 18
Outfall 001 - Once Through Non-Contact Cooling Water
Raw water from the Catawba River is passed through condensers and
auxiliary equipment on a "once-through" basis to cool equipment and
condense exhaust steam from the turbines. When RSS is operating at full
power, it is has a design capacity to pump 622.1 MGD of cooling water
through a network of tubes that runs through the condenser and selected
heat exchangers (e.g. turbine lube oil cooler, condensate cooler, plant chiller
system). This raw water in the condenser tubes absorbs heat from a closed
system of highly purified exhaust steam from the turbines and converts it
back to water. Condensed exhaust steam is then returned to the boilers and
is recycled a number of times. The cooling water is returned to the lake. No
chemicals are added and only heat rejected from the condensers and auxiliary
equipment is absorbed by the cooling water, hence the term "once through,
non-contact cooling water" is applied.
The condensers at RSS are cleaned mechanically. Periodically, metal or
plastic scrapers are forced through the tubes to rid them of scale or other
deposits.
Each unit at RSS has two condenser cooling water (CCW) pumps. The
capacities of these pumps are listed below. Normal plant operation of the
CCW pumps is based on intake and discharge temperatures and unit load.
Further, the units are typically operated on different computer highways or
WDPF control systems to avoid a system trip that would suddenly reduce the
discharge flow at 001 . This practice leads to a higher reliability factor for
the units and protection of aquatic life taking refuge in the discharge canal
during cold weather.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 4 of 18
Condenser Cooling Water Pump Capacities
Table 1
Unit No. 1-Pump GPM 2-Pump GPM
1 36,000 72,000
2 36,000 72,000
4 33,500 67,000
5 33,500 67,000
6 38,500 77;000
7 38,500 77,000
Design Rated Cooling Water Capacity 432,000 GPM (622.1 MGD)
A. Filter Backwash from Raw Water Intake Screening Device
(Permitted pursuant to G.S. 143-215.1 (c) and Part III section I of
current permit.)
Raw water intake screens at RSS are backwashed on an as needed
basis. Normally, the screens require backwashing once per twelve
hour shift for a period of approximately 20 minutes. The water
required for backwashing is supplied by a low pressure service pump
with a design capacity of 800 gpm. Therefore, the average flow of
water used to backwash the screens is 0.032 MGD. Should it become
necessary to backwash the screens on a continuous basis the
maximum flow would be 1 .15 MGD. This intake screen backwash is
discharged into the condenser cooling water line downstream of the
condensers. The debris collected on the screens consists mainly of
twigs, leaves, and other material indigenous to the Catawba River
system.
B. Intake Tunnel Unwatering Sump
In the event that maintenance activities are needed in the intake
tunnels an unwatering sump is provided to remove water from the
tunnells). To date this operation has not been done, but it is available
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 5 of 18
should the need arise. Raw water in the tunnels can be removed by a
sump pump to the discharge side of the condensers which would then
exit at outfall 001 .
C. Turbine Non-Destructive Testing
Bore sonic testing of turbine rotors is infrequent, once every 5 years.
A maximum of 400 gallons of demineralized water mixed with 4
gallons of a corrosion inhibitor, e.g. Calgon CS, is used during the •
testing per unit. The mixture is drained and mixed with once through
cooling water downstream of the condensers which discharges at
outfall 001 .
//. Outfall 002 - Ash Basin Treated Effluent
The ash basin at RSS accommodates flows from the yard drain sump, boiler
room sump, ash removal system and non-point source storm water. Total
average influent from these sources combined is approximately 6 MGD. At
times, due to unit loads, rainfall, evaporation and seepage of ash basin
ponds, the amount of effluent may be quite different than influent volumes.
A. Yard Drain Sump
The yard drain sump is a large concrete structure that has four level
controlled pumps that direct waste water from RSS to the ash basin.
These pumps are operated on a rotating basis. Usually two pumps are
set so that one pump is primary and the other is backup. After a
preselected period the controls are changed so that different pumps
are utilized.
The yard drain sump collects waste water from many sources, such
as, the filtered water system, sanitary system, ground water
remediation system, and turbine room sumps. It collects once through
non-contact cooling water from the induced draft (ID) fan motors and
the preheater bearings located in the stacks. The yard drain sump also
collects storm water runoff from the coal pile, rail access, powerhouse
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 6 of 18
roof and paving. Ground water from a foundation drainage system
under the track hopper is also intermittently discharged to the yard
drain sump. The combined average flow from all sources tied to the
yard drain sump is approximately 1 .4 MGD.
1. Filtered Water System - Old End Pit Sump
The filtered water treatment system at RSS consists of a
clarifier, five gravity filters, two activated carbon filters, and one •
set of demineralizers. Waste water and filter media from the
filtered water system (except demineralizer waste water which
goes to the boiler room sump) is drained to what RSS
commonly refers to as the "Old End Pit Sump". From the pit
sump the waste water is pumped to the yard drain sump.
a. Clarifier
The clarifier utilizes typical water treatment chemicals
such as, aluminum sulfate, Nalco 8105 cationic
polyelectrolyte, sodium hydroxide, Calgon-25 clay and
chlorine for the primary treatment of raw water. 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 (alum) and sodium hydroxide.
Approximately, 150 gallons per year of Nalco 8105
polyelectrolyte may be used to replace the use of
aluminum sulfate. The quantity of alum used per year is
approximately 6,000 lbs. The total amount of caustic is
roughly half the amount of alum. The average volume of
water required for desludging the clarifier is approximately
0.002 MGD. These sedimentation wastes along with
dilute water treatment chemicals and by-products are
piped to a floor drain which flows to the old end pit sump
where they are pumped to the ash basin via the yard
drain sump.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 7 of 18
b. Gravity Filters
There are five gravity filters composed of anthracite (coal)
which follow the clarifier in the water treatment process.
Normally, one of these filters is backwashed each day.
Approximately 0.002 MGD of backwash water is required
for each filter. This waste water flows through floor
drains to the old end pit sump which pumps to the yard
drain sump. The anthracite filter is changed on an as •
needed basis with the spent filter media being sluiced to
the ash basin via the yard drain sump.
c. Activated Carbon Filters
The filtered water system includes two activated carbon
filters. These filters are typically backwashed once a
month. The flow of water required to backwash one of
these filters is four hours (4) at 100-120 gallons per
minute. The backwash flows to the #6 and #7 turbine
room sump and is pumped to the yard drain sump.
Approximately 80 ft3 of activated carbon is replaced
yearly with the spent carbon sluiced to the yard drain
sump.
2. Sanitary System
The sanitary wastes from the plant are treated by a series of
three 4,000 gallon septic tanks in parallel and a 1,200 gallon
holding tank. Sanitary effluent is pumped from the discharge
chamber of the septic tanks to the ash basin via the yard drain
sump for final treatment. The sanitary waste system is
designed for 12,500 gallons per day. This design was based on
a maximum of 300 and an average of 150 people at the site.
Based on annual data the average daily flow to the yard drain
1Permit to operate implicit in the submittal of the Engineer's Certification performed by Mr. David
Grogg, PE 14075, Duke Power Company (DPC) to North Carolina Department of Environment,
Health and Natural Resources (NCDEHNR) dated 11/19/92.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 8 of 18
sump has been approximately 0.006 MGD.
The sanitary system accommodates waste water flow from
following sources:
a. General plant sanitary waste water
b. Chemical makeup tanks and drum rinsate
(Intermittent rinse water containing small amounts of
aluminum sulfate, sodium hydroxide, hydrazine, •
ammonium hydroxide)
c. Laboratory drains
(Small amounts of laboratory chemicals used to test
waste water effluents and high purity boiler water, see
table 3.)
d. GSD trailer sanitary waste water
4. Turbine Room Sumps
The turbine room sumps collect approximately 1 MGD of waste
water via a network of floor drains from intermittent sources
listed below.
a. Ground Water Remediation System
This system was installed in 19922. Ground water is
pumped through an oil water separator and then to the
turbine room sump. Trace amounts of volatile organic
compounds may be in this waste water, such as
naphthalene, chrysene, MTBE, and bis(2-
ethylhexyl)phthalate3. The average daily flow from this
system is (2 gpm) approximately 0.003 MGD. A revised
ground water corrective action plan has been submitted
to NCDEHNR that specifies a system capable of 20 gpm.
2Permit to operate based on letter to Mr. Mike Parker (NCDEHNR) from Mr. Phil Hammond (DPC)
dated 1/3/91.
3Reference semiannual monitoring report to Mr. Chris DeRoller (NCDEHNR) from Mr. Norwood Davis
(DPC) dated 3/23/94.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 9 of 18
Therefore, when the corrective action plan is approved
the ground water remediation system will be capable of
0.03 MGD.
b. Condensate from the feed water system (seal water,
valve and pump leakage, cooling water, vents)
c. Equipment cooling water, i.e. air compressors
d. Floor wash water containing janitorial products
e. Boiler room sump overflow
f. Emergency fire fighting water
g. Chiller condensates
5. Storm Water
The yard drain collects storm water runoff from the coal pile,
rail access, powerhouse roofs and paving around the
powerhouse and pumps it to the ash basin. A total of 21 .8
acres drain to the yard sump with an average daily runoff
estimated at 0.04 MGD. The average daily runoff is calculated
based on an annual rainfall of 47 inches with 1 .0 and 0.5 run-
off coefficients applied appropriately. Trace amounts of oil and
grease may be present in the first flush of storm water.
a. Coal Pile Run-off
The coal pile at RSS covers an area of approximately 13
acres with an estimated storm water run-off of 0.023
MGD. The coal pile runoff drains by gravity to the yard
drain sump and is then pumped to the ash basin.
b. Rail Access Run-off
The rail access area where significant coal handling
activities occur is approximately 2.5 acres. An estimate
of storm water run-off from this area is 0.004 MGD.
Storm water drains by gravity from this area to the yard
drain sump.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 10 of 18
c. Powerhouse Roof, Paving and Hard-packed Gravel Areas
The roof of the powerhouse, paving and hard-packed
gravel areas around the powerhouse collect storm water
that is drained to the yard drain sump. Trace amounts of
oil and grease may be present in the first flush of storm
water. With an area of approximately 6.3 acres an
estimate of storm water run-off is 0.01 MGD. •
6. ID Fan and Preheater Bearing Cooling Water
Once through non-contact cooling water is supplied to the ID
Fan motor and preheater bearings to remove excess heat. The
rate of flow through these two pieces of equipment which
discharges to the yard drain sump is approximately 0.03 MGD.
7. Track Hopper Sump
The track hopper sump collects ground water from an
foundation drain system underneath the track hopper. The flow
is usually intermittent, however the pump capacity is 100 gpm
MGD. On a daily basis it is estimated that the run time is only
50% which would correspond to a flow of 0.05 MGD.
B. Boiler Room Sumps
The average flow pumped from the boiler room sumps directly to the
ash basin is approximately 1 .3 MGD. The sources of input to the
boiler room sumps includes the following:
1. Waste water from demineralizer regeneration
Demineralizers at RSS consists of two mixed-bed cells which
supply make-up water to the boilers and other closed systems.
Normal plant operation requires that only one cell of the
demineralizer operates at any one time. Each cell has a capacity
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 11 of 18
of 120 gpm.
Each cell is regenerated approximately every other day. Each
year RSS will use an estimated 43,000 lbs of 100% caustic and
40,000 lbs 93% sulfuric acid for demineralizer regenerations.
Brine treatment of the demineralizers is done twice a year and
with a total use of 9,000 lbs of salt (NaCI). An average dilute
waste chemical and rinse flow is approximately 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 via
the yard drain sump. The useful life of the resin varies and
when deemed replacement is needed the spent resin is sluiced
to the ash basin.
2. Coal pulverizing mill cooling water (trace oil and grease)
3. Closed system drainage, cleanings, testing containing:
Corrosion inhibitors, e.g. Calgon CS and MCS plus24
Biocides, e.g. Calgon H-300 and H-5105, Bulab 60026
Cleanings? (e.g. small heat exchangers)
Dispersant, e.g. polyacrylamide
Wetting agent, e.g. sodium lauryl sulfate
Detergent, e.g. tri-sodium phosphate
Leak testing, e.g. disodium fluorescing dye
4. Turbine room sump overflow.
5. Boiler seal water (trace oil and grease).
6. Miscellaneous system leakage's (small leaks from pump
packings and seals, valve seals, pipe connections).
7. Moisture separators on air compressor precipitators.
8. Floor wash water containing janitorial cleaners.
4Molybdate based corrosion inhibitors are planned for future use.
. 5Approval for Biocides Calgon H-300 and H-510 was given by letter to Ms. Dayna Russell (DPC)
from Mr. Preston Howard (NCDEHNR) dated 8/19/93.
6Bulab 6002 approved for use at Cliffside Steam Station by letter to Mr. Ron Lewis (DPC) from Mr.
Preston Howard (NCDEHNR) dated 1 1/12/92.
7To date small closed system cleanings (e.g. heat exchangers) have not used these chemicals,
reserved for future use.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 12 of 18
9. Emergency fire fighting water.
10. Ash removal system overflow.
11. Boiler blowdown
Primarily at unit startup and until water chemistry stabilizes the
blowdown from the boilers at RSS is allowed to flash in a
blowdown tank. After water chemistry has stabilized the
blowdown condensate flow is small. The condensate is drained
to the boiler room sumps. Trace amounts of hydrazine,
ammonia, and silica oxide is may be present in the condensate.
At startup 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 flow from blowdown amounts to an average of
approximately 0.005 MGD. This flow is routed to the boiler
room sump and then to the ash basin. A significant portion of
this blowdown steam is vented to the atmosphere.
12. Chemical Cleaning of Boilers
Boilers #7, #8, #9 and #10 at RSS are chemically cleaned on an
as needed basis (Boilers #1-#6 are retired). Tube inspections
are done during outages which indicate when cleaning needs
scheduling. Boilers #7 and #8 are natural circulation boilers and
#8 and #9 are controlled circulation boilers.
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 total volume of dilute waste
chemicals, including rinses, discharged from #7 or #8 boilers
during a chemical cleaning is 365,000 gallons. The total
volume of dilute waste chemicals drained from #9 or #10
amounts to 275,000 gallons. These wastes are drained to the
boiler room sump which pumps directly to the ash basin.
Immediately prior to the beginning of a boiler cleaning, additional
Supplemental Information

r
NC #0004961 Permit Renewal Application
May 23, 1994
Page 13 of 18
stop logs 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). Chemicals and amounts
required to clean the boilers at RSS follows on the next page:
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 14 of 18
Boiler Cleaning Chemicals and Amounts Used Per Unit
Table 2
First Stage
Chemical Boiler #7 or #8 Boiler #9 or #10
Sodium Bromate 550 lbs. 550 lbs.
Ammonium Carbonate 1000 lbs. 1000 lbs.
Ammonium Hydroxide 850 gal. 850 gal.
(26°Be')
Second Stage
•
Hydrochloric Acid (31 .5%) 3600 gal. 3400 gal.
(20°Be')
Ammonium Bifluoride (0.5%) 1100 lbs. 1050 lbs.
Copper Complexer (0.75%) 1660 lbs. 1630 lbs.
Thiourea or equivalent
Sodium Carbonate 3000 lbs. 3200 lbs.
Citric Acid 300 lbs. 200 lbs.
Alkaline Boilouts (only after major boiler tube work)
Soda Ash 2000 lbs. 2000 lbs.
Triton X-100 Detergent (0.05%) 10 gal. 10 gal.
Antifoam Agent (0.025%) 5 gal. 5 gal.
C. Ash Removal System
RSS utilizes electrostatic precipitators as its air pollution control
devices. The fly ash captured in these precipitators is water-sluiced to
the ash basin. Bottom ash from the boilers is also water-sluiced to the
ash basin. Approximately 3 MGD are required for this purpose.
Electrostatic precipitators at RSS are normally cleaned by mechanically
vibrating the wires and rapping the plates inside the precipitator.
Before major precipitator work is performed they are cleaned by a
wash down. The wash water is pumped to the ash basin.
Supplemental Information

'
NC #0004961 Permit Renewal Application
May 23, 1994
Page 15 of 18
D. Storm Water
Non-point sources of storm water to the ash basin includes a pond
area of 77.3 acres and an upgradient watershed area of 21 .4 acres.
The estimate for storm water run-off is based on forty-seven (47)
inches of rain per year with a 1 .0 and 0.5 run-off coefficient for the
pond area and upgradient watershed respectively. The average non-
point source storm water input for the ash basin is estimated at 0.31 •
MGD.
ill. Spill Prevention
A. Oil Storage
Riverbend Steam Station presently has four (4) above ground oil
storage tanks - one (1) 4,250,000 gal. fuel oil tank, one (1) 27,000
gal. light-off fuel oil tank, one (1) 20,000 gal. mineral oil storage tank,
and one (1) 2,000 gal. used oil storage tank.
All above ground tanks at RSS have secondary containment provided
which are capable of containing the entire contents of the tank. An oil
trap tank is located in the drainage area of the 4.25 million gallon oil
tank as an added precaution.
All oil storage facilities are presently covered under Spill Prevention
Control and Countermeasure Plans.
Supplemental Information

NC #0004961 Permit Renewal Application
May 23, 1994
Page 16 of 18
IV. Hazardous Substances
The following is a list of the hazardous substances located on site that are listed in Table
117.3 of 40 CFR 117. These substances are anticipated to be discharged to the ash basin
on a continuous or intermittent basis within the scope of relevant station operation.
Hazardous Substances at Riverbend Steam Station
Table 3 •
POLLUTANT QUANTITY LOCATION USE
Acetic acid 2 gal. Lab Water Analysis
Aluminum sulfate 3000 lbs Water Treatment Clarifier
Ammonia 5 lb (gas) Lab pH control
Ammonium hydroxide 100 gal Powerhouse pH control
Ammonium hydroxide 6 gal. Lab pH control/cleaning
Chlorine (gas) 1200 lbs. Water Treatment Disinfectant
Hydrochloric acid 6 gal. Lab Water Analysis
Hydrazine* 200 gal Powerhouse Corrosion Inhibitor
Nitric acid 1 gal. Lab Sample Preservation
p-Dimethylamino 2.2 lbs Lab Water Analysis
-benzaldehyde*
Potassium hydroxide 5 lbs. Lab Water Analysis
Potassium permanganate 1 lb Lab Water Analysis
Sodium bisulfite 5 lbs. Lab Water Analysis
Sodium hydroxide 4600 lbs. Powerhouse Demineralizer
Sodium hydroxide 2 lbs. Lab Water Analysis
Sodium hypochlorite (12.5%) 55 gal.. Water Treatment Disinfectant
Sodium phosphate (tribasic) 1000 lbs Powerhouse Cleaning
Sulfuric acid 4000 lbs. Powerhouse Demineralizer
r-
Sulfuric acid 4 gal. Lab Water Analysis II
Values represent maximum quantities usually on-site at any given time and do not necessarily
reflect quantities discharged. Various amounts of these substances may go to the ash basin for
treatment due to use in site laboratories, small leaks, spills, or drips from closed loop systems.
Treatment of these hazardous substances and their by-products is achieved by physical and
biological activity in the ash basin. Boiler cleaning chemicals are listed in Table 2.
*Listed in 40 CFR 302.4 - Table 302.4 List of Hazardous Substances and Reportable Quantities.
Supplemental Information

' r
NC #0004961 Permit Renewal Application
May 23, 1994
Page 17 of 18
V. 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. NC#0004961
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. The
character of the thermal discharge has not changed since the original 316(a)
determination. Accordingly, Duke requests that the thermal limitations as
modified in the present permit be continued. Riverbend Steam Station has
been operating within the EPA nomograph for delta T at outfall 001 since
July 26, 1993.8
VI. Ash Basin Capacity
Part III Section U of the existing NPDES permit for RSS requires the
permittee to provide and maintain at all times a minimum free water volume
(between the top of the sediment level and the minimum discharge elevation)
equivalent to the sum of the maximum 24 hour plant discharges plus all
direct rainfall and all runoff flows to the pond resulting from a 10 year, 24
hour rainfall event, when using a runoff coefficient of 1 .0.
Free water volume of ash basin at RSS:
Estimate of runoff from 10yr/24 hr storm
Natural drainage area of ash basin 98.7 acres
Powerhouse yard area 21.8 acres
Precipitation from 10yr/24 hr storm 5 inches
Total stormwater runoff to ash basin 50.21 Ac-ft
8Reference letter to Mr. John Carter (DPC) from Mr. Steve Tedder (NCDEHNR) dated 7/26/93.
Supplemental Information

r
NC #0004961 Permit Renewal Application
May 23, 1994
Page 18 of 18
Estimate max. 24 hr dry weather waste stream discharging to ash basin:
From station records, maximum recorded ash basin discharge
(obtained weekly): 10.66 MGD
For conservatism, increase maximum discharge recorded at station by
10%: 35.99 Ac-ft
Free Water Volume = 50.21 + 35.99 = 86.2 Ac-ft •
Estimate quantity of solids (ash) to be discharged to ash basin during life of
permit: (ref. PROMOD analysis for base coal consumption dated 2/21/94)
Year Estimated Coal Assumed Estimated Ash Estimated Ash
Consumption Ash % Production Production (Ac-ft)
(1000's tons) (1000's tons)
1994 442 10 44.2 36.9
1995 357 10 35.7 29.8
1996 627 10 62.7 52.3
1997 561 10 56.1 46.8
1998 748 10 74.8 62.4
Total 2735 273.5 228.3
Estimate of total storage volume required for term of permit:
228.3 + 86.2 = 314.5 Ac-ft.
As of 8/25/93 estimate of total ash basin water volume:
Primary cell water volume: 88.3 Ac-ft (elev. 725 MSL)
Secondary cell water volume: 389.9 Ac-ft (elev. 715 MSL)
Estimate of total ash basin water volume = 88.3 + 389.9 = 478.2 Ac-ft
Volume required = 314.5 Ac-ft < 478.2 Ac-ft
Conclusion: The ash basin at RSS has sufficient capacity for the term of the new
permit.
Supplemental Information

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Randy Kepler
Date: September 16 , 1993
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Gaston
NPDES Permit No. : NC0004961
MRO No. : 93-222
PART I - GENERAL INFORMATION
1 . Facility and Address : Riverbend Steam Station (modification)
Duke Power Company
Post Office Box 367
Mount Holly, N. C. 28012
2 . Date of Investigation: N/A
3 . Report Prepared By: Michael L. Parker, Environ. Engr . II
4 . Person Contacted and Telephone Number: N/A
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 Old Hwy. 16 crossing.
6 . Discharge Point(s) , List for all discharge Points : -
outfall 001 outfall 002
Latitude: 35° 21 ' 28" 35° 22 ' 06"
Longitude: 80° 58' 12" 80° 57 ' 31"
Attach a USGS Map Extract and indicate treatment plant site
and discharge point on map.
USGS Quad No . : F 15 SW
7 . Site size and expansion area consistent with application:
Yes .
8 . Topography (relationship to flood plain included) : Gently
rolling slopes (3-10%) .
9. Location of Nearest Dwelling: Approx. 1000+ feet from the
site.

Page Two
10 . Receiving Stream or Affected Surface Waters : Catawba River
(Mountain Island Lake)
a. Classification: WS-IV, B
b. River Basin and Subbasin No. : Catawba 030833
c. Describe receiving stream features and pertinent
downstream uses : Discharge enters main stem of Catawba
River, which has excellent flow. Receiving stream
experiences frequent human (bodily) contact through
recreational activities and is also used as a public
water supply (Mount Holly) .
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1 . a. Volume of Wastewater: 88 . 96 MGD (Total flows from both
outfalls)
b. What is the current permitted capacity: N/A
c . Actual treatment capacity of current facility (current
design capacity) : N/A
d. Date(s) and construction activities allowed by previous
ATCs issued in the previous two years : N/A
e. Description of existing or substantially constructed
WWT facilities : There are no treatment facilities at
outfall 001, The existing WWT facilities at outfall 002
consists of a 0 .010 MG capacity septic tank for the
pretreatment of domestic waste prior to entering an ash
basin.
f . Description of proposed WWT facilities : N/A
g. Possible toxic impacts to surface waters: None
expected.
h. Pretreatment Program (POTWs only) : N/A
2 . Residual handling and utilization/disposal scheme: Sludge is
removed from the septic tank by a septage hauler when
necessary and disposed of at a DEH permitted disposal
location.
3 . Treatment Plant Classification: Less than 5 points; no
rating (include rating sheet) . Class I
4. SIC Code(s) : 4911
Wastewater Code(s) :
Primary: 14
Secondary: 68 , 16, 69
5 . MTU Code(s) : 50007

Page Three
PART III - OTHER PERTINENT INFORMATION
1 . Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)?
No
2 . Special monitoring or limitations (including toxicity)
requests : None at this time.
3 . Important SOC/JOC or Compliance Schedule dates : N/A
4 . Alternative Analysis Evaluation: N/A
PART IV - EVALUATION AND RECOMMENDATIONS
Duke Power Company (DPC) requests that the subject Permit be
modified to substitute the guidelines of an EPA thermal nomograph
for the existing downstream AT limitation (2 . 8°C) . Other thermal
limitations contained in the subject Permit would remain
unchanged.
Although we have little familarity with the above referenced
nomograph, DPC indicates that they should have little difficulty
in complying with the thermal range the nomograph establishes . On
July 26, 1993 , DPC received tentative approval from the Division
to begin using the nomograph to monitor their downstream AT.
Pending a final approval by the TSB, it is recommended that the
permit be modified to substitute the EPA nomograph for the
downstream AT limitation.
S nature of Report Preparer Date
Water Quality Regional Supervisor Date

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North Carolina
artment of Environment,
Health and Natural Resources ` • •
Division of Environmental Management :.
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary p C 1____I r R
A. Preston Howard, Jr., P.E., Director
,12
G \ c. D@p'i. OF 14TATYr
RR
./i C) COMM01/41— Pr
` 11 September 1, 1993
Mr. RONALD E. LEWISH` '4,jw1- 4 P 0 7 1993
DUKE POWER COMPANY
P. O. BOX 367 AIY!vl"N q r ,;;' • AT
MOUNT HOLLY, NC 28120 �€iG4ES'dl!!E RE51ttRl 11fFI+CE
119 . Subject: Application No. NC0004961
/ 0 Riverbend Steam
Gaston County
Dear Mr. LEWIS:
.The Division's Permits and Engineering Unit acknowledges receipt of your permit application and
supporting materials received on August 26, 1993. This application has been assigned the number
shown above. Please refer to this number when making inquiries on this project.
Your project has been assigned to Randy Kepler for a detailed engineering review. A technical
acknowledgement will be forthcoming. If this acknowledgement is not received within thirty (30)
days, please contact the engineer listed above.
Be aware that the Division's regional office, copied below, must provide recommendations from the
Regional Supervisor for this project prior to final action by the Division.
I am, by copy of this letter, requesting that our Regional Office Supervisor prepare a staff report and
recommentations regarding this discharge. If you have any questions regarding this application,
please contact the review person listed above.
Sincerely,
C4ase7CL. 01C61114t-tee
Coleen H. Sullins, P.E.
Supervisor, Permits and Engineering Unit
cc: aimmummilsorieMPOIMIMI
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Duke Power Company " b
Generation Services Department 34 DO .6b
13339 Hagers Ferry Road
Huntersville, NC 28078-7929
4%ENs♦ F.C. DEPT. OF NATURAL
/c;�4\
ouRErowER l DUKE POWER R F"°'R' ` •
�s•ws COMM1"'I +rr T.
August 20, 1993 °"P 0 7 1993
Ms. Coleen Sullins cr rnny Af
Permits and Engineering Unit LlCORES'iiiLE Ri.jf l 6ifiCE
North Carolina Department of Environment,
Health and Natural Resources
Division of Environmental Management
P.O. Box 29535 -24
Raleigh, North Carolina 27626-0535
Subject: Modification of NPDES permit for —f
Buck Steam Station Permit No. NC0004774
Cliffside Steam Station Permit No. NC0005088
Dan River Steam Station Permit No. NC0003468
Riverbend Steam Station Permit No. NC00049611
File: BK-702.40, CS-702.40, DR-702.40, RB-702.40,
Dear Ms. Sullins:
Please find enclosed the additional information needed to continue with the permit
modification request for Dan River Steam Station and the remaining three Stations, Buck,
Cliffside, and Riverbend Steam Stations, and Check #034923 in the amount of $400.00 to
cover the modification processing fees for each permit. As requested for Dan River Steam
Station, we request to modify the NPDES permit of these Stations so that operation per the
guidelines of the EPA nomograph can be substituted for the downstream AT limit. A report is
attached for your review that evaluates operation of the remaining three Stations per the
requested modification. Also attached are copies of the respective page for outfall 001 of the
NPDES permit of these Stations with suggested revisions that reflect the following:
* Replace the 2.8°C (5°F) AT limit at the downstream monitoring location with
thermal limits based on the EPA nomograph (see attached report) at end-of-pipe
discharge of outfall 001.
The other thermal limits, 35°C (95°F) monthly average at end-of pipe and 32°C (89.6°F)
daily average downstream, would remain unchanged. Annual balanced and indigenous
population monitoring of biota will be continued, as approved by NCDEHNR. Additional
fisheries monitoring will be conducted during the winter months (January/February) to also
further assess the use of the EPA nomograph.
Proved on rec vclec Dane,

- Additional Information
Buck Steam Station Report
The enclosed report is also submitted in lieu of the ambient water temperature monitoring
location study report that is required for Buck Steam Station by August 30, 1993. The
purpose of the ambient monitoring location study was to determine a site in High Rock Lake
out of the influence of the thermal discharge of Buck Steam Station for measurement of
ambient lake temperature rather than at the Station intake. Relocation of ambient temperature
monitoring from the Station intake in the riverine area of High Rock Lake/Yadkin River to a
location in High Rock Lake was to address the impact that changing meteorological conditions
had on the AT calculation for the Station. Because of approval of the requested modification,.
relocation of the ambient temperature monitoring location will not be necessary.
Relocation of Downstream Monitoring Location
Dan River Steam Station
As you are aware, relocation of the downstream temperature monitoring location closer to the
Station has been requested for Dan River Steam Station. This was requested to allow the
Station the flexibility to make operational adjustments to prevent exceedances of the discharge
temperature limit set forth by the EPA nomograph, further reduce the possibility of fish kills
due to cold shock, and maintain the balanced indigenous community.
Other Steam Stations
Because of refurbishment of the units for Buck and Cliffside is presently on-going, relocation
of the downstream temperature monitoring location for these Stations is not requested at this
time. Thermal plume modeling, as well as, on-going water temperature and biological
monitoring being conducted in the receiving waters of the steam stations, will be evaluated to
determine if the downstream monitoring location for these Stations should be relocated, as well
as consider deletion of the flow bypass requirement for Buck and Cliffside Steam Stations.
Relocation of the downstream monitor for Riverbend Steam Station is not requested.

Thank you for your time and input on our discussions about AT concerns at these Stations. If
you have any questions, please contact me at (704)-875-5968.
Sincerely,
Ronald E. Lewis, Scientist
Environmental Division
Generation Services Department
REL
attachments
xc w/o attachments: Mr. Steve Mauney, DEM Winston-Salem
Mr. Mike Parker, DEM Mooresville
Mr. Steve W. Tedder, DEM Raleigh

tate of North Carolina
Department of Environment,
Health and Natural Resources 46117'lroidi
Division of Environmental Management
James B. Hunt, Jr., Governor , —
Jonathan B. Howes, Secretary11� C �
1 A. Preston Howard, Jr., P.E., Director soI.rRcr5 AM)
,VOMMLTNITY DE r::1.'Tr r
\( ).
June 16, 1993
'JUN 1 5 1993
Mr. J.S. Carter
. \' k Duke Power Company AN
SIO I
Generation Services Department A $r ERRGNMENT�t u ,1GEMEM
Iilf RE&IDPiAI OFFICE
` 13339 Hagers Ferry Road
Huntersville, NC 28078-7929
Subject: Request for Reduction of Monitoring
Duke Power Company
NC0004979-Allen Steam Station
NC0004774-Buck Steam Station
NC0005088-Cliffside Steam Station
NC0003468-Dan River Steam Station
NC0004987-Marshall Steam Station
44/C00049 6 1-Riverbend
Dear Mr. Carter:
On January 20, 1993 the Division of Environmental Management received a request from
Dayna Russell of Duke Power for the reduction in monitoring requirements. The requirement
requested to be removed from the above mentioned permits read as follows: "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 a specified depth per facility
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." DEM has
reviewed the request and the data submitted over the past year for the above facilities and has
agreed to the reduction of monitoring by removing the above statement.
Please find enclosed revised effluent pages which should be inserted into each appropriate
permit. The old pages should be discarded. The effluent pages for Marshall (NC0004987) have
previously been changed and sent under separate cover. All other terms and conditions contained
in the original permit remain unchanged and in full effect. These permit modifications are
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 have the right to an adjudicatory hearing upon written request
within thirty (30) days following receipt of this letter. This request must be in the form of a
written petition, conforming to Chapter 150E of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings, Post Office Drawer 27447, Raleigh, North Carolina
27611-7447. Unless such demand is made, this decision shall be final and binding.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10%post-consumer paper

.S. Carter
, Duke Power Company
June 1, 1993
Page 2
If you have any questions concerning these permit modifications-, please contact Mr. Randy
Kepler at telephone number 919/733-5083.
Sincerely,
-
arii,t___//1
V. Preston H d, Jr. P.E.
cc. Jim Reid, Asheville Regional Office
Ron Linville, Winston-Salem Regional Office
Mike Parker, Mooresville Regional Office
Technical Support Branch
Dayna J. Russell, Duke Power
Compliance
Permits and Engineering Unit (Copy per each permit)
Central Files (Copy per each permit)

A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS -FINAL Permit 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 serial number 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 Units (Specify) Measurement Sample *Sample
Mon. Avg.Daily Max. Mon. Avg. Daily Max. Frequency Type Location
Flow Weekly Pump Logs or ;E.`
Similar readings
Total Suspended Solids**** 23.0 mg/I 75.0 mg/I 2/month Grab E
Oil and Grease 11.0 mg/I 15.0 mg/I 2/month Grab E
Total Copper 1.0 mg/I 1.0 mg/I 2/month Grab E
Total Iron 1.0 mg/I 1.0 mg/I 2/month Grab E
Total Arsenic 480.0 µg/I 2/month Grab E
Total Selenium Monthly Grab E
Total Nitrogen (NO2 + NO3 + TKN) Monthly Grab E
Total Phosphorus Monthly Grab E
Chronic Toxicity** Quarterly Grab E
Pollutant Analysis *** Annually E
* Sample Locations: E - Effluent
Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with an other waste stream.
** Chronic Toxicity (Ceriodaphnia) P/F at 10%; January, April, July, October; See Part III,Condition Q.
*** See Part III, Condition R.
**** Monthly average of 43 mg/1 is permitted provided that the Permittee can satisfactorily demonstrate the the difference between
23 mg/1 and 43 mg/1 is due to the concentration of total suspended solids in the intake water.
The metal cleaning waste, coal pile runoff,ash transport water, domestic wastewater, and low volume waste shall be discharged into o
the ash settling pond.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 2/month at the effluent by
grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

State of North Carolina
Department of Environment,
`'}jjHealth and Natural Resources 46,41.WiA
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary p E H N F1
A. Preston Howard, Jr., P.E., Director
itigta,.1993
John Carter
Duke Power Company QUG 0 4 1993
13339 Hagersferry Road
Huntersville, North Carolina 28708-7929 �t+ u�i��Nt
IrnsioN aF EwvinoR�`a^��' UFFICE
S Cliffside NC0005088, Rutherford
Buck NC0004774, Rowan
Dan River NC0003468,Rockingham
Riverbend NC0004961, Gaston
Dear Mr. Carter:
In accordance with your request and until further notice, the subject four facilities:
Cliffside Steam Station,Buck Steam Station, Dan River Steam Station and Riverbend
Steam Station, are to operate within the EPA nomograph for the delta T at the discharge
pipe. We are continuing to proceed with the permit modification request and expect to
receive the additional information needed for the remaining three sites,Cliffside,Buck, and
Riverbend.
If you have any question,please call Coleen H. Sullins, at 919/733-5083.
Sincerely,
Steve W. Tedder, Chief
Water Quality Section
cc: Regional Offices
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50%recycled/ 10% post-consumer paper

�� State of North Carolina
4))../ Department of Environment,
Q � Health and Natural Resources i •
V � Division of Environmental Management
James B. Hunt, Jr., Governor
o Jonathan B. Howes, Secretary p E H N R
A. Preston Howard, Jr., P.E., Director
July 26, 1993
John Carter � '
Duke Power Company *coop
13339 Hagersferry Road 41993
Huntersville, North Carolina 28708-792 C
3
Tl :", �liffside NC0005088, Rutherford
lippgS1111.1 R"' Buck NC0004774, Rowan
Dan River NC0003468, Rockingham
Dear Mr. Carter:
In accordance with your request and until further notice,the subject four facilities:
Cliffside Steam Station, Buck Steam Station, Dan River Steam Station and Riverbend
Steam Station,are to operate within the EPA nomograph for the delta T at the discharge
pipe. We are continuing to proceed with the permit modification request and expect to
receive the additional information needed for the remaining three sites, Cliffside,Buck, and
Riverbend.
If you have any question, please call Coleen H. Sullins, at 919/733-5083.
Sincerely,
Steve W. Tedder, Chief
Water Quality Section
cc: Regional Offices
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50%recycled/ 10%post-consumer paper

IC C. DE,P`I'. or:NATI IQC "
/ RESOURCES AND
)I COMMUNITY DEVELOPMENT
r;?7 �' 0417\
NOV 1 61992
DIVISION Of ENVIRONIIlEI1TAL VIANAGEMft�,
YIOORESViklE Af,GIDNAI p�fICE ,
State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street• Raleigh, North Carolina 27604
James G. Martin, Governor A. Preston Howard, Jr., P.E.
William W. Cobey, Jr., Secretary Acting Director
November 12, 1992
Ron Lewis, Scientist
Duke Power Company
TTC/Applied Science Center MGO3A5
1339 Hagersferry Road
Huntersville, North Carolina 28708-7929
SUBJECT: Duke Power Steam Stations
Permit No. NC0003468
Dan River, Rockingham Co.
41001111111111111101211111.
Permit No. NC0005088
Cliffside, Rutherford Co.
Dear Mr. Lewis:
In accordance with your permit modification requests received on October 20, 1992, we are
forwarding herewith the modifications to the subject permits. These modifications include changing the
temperature footnote for upstream and downstream monitoring for outfall 001 in each permit to read as
follows: "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 degrees Celsius (5
degrees F), herein after referred to as the Delta T, and in no case cause the ambient temperature to exceed
32 degrees Celsius (89.6 degrees F). The Delta T shall be the difference between the daily average
upstream temperature and the daily average downstream water temperature. The ambient water temperature
shall he defined as the daily average downstream water temperature." Attached is the modified effluent
limitation sheet for outfall 001 of each permit. These pages should be inserted into the appropriate permits.
Additionally, your request for approval for the use of Bulab 6009 microbiocide to be sprayed on the
structure of the recirculating cooling towers at the Cliffside Steam Station dated September 2, 1992, is
hereby granted.
REGIONAL OFP10ES
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 919/733-2314 919/946-6481 919/395-3900 919/896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Duke Power
November 12, 1992
Page Two
These permit 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 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 have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings,
Post Office Drawer 27477, Raleigh, North Carolina 27611-7447. Unless such demand is made, this
decision shall be final and binding.
Please take notice 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 requirements to obtain other permits which may be required by
the Division of Environmental 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 Coleen Sullins at telephone number
919/733-5083.
Sincer ly,
(yA. Preston Howard, Jr.
cc: Mr. Jim Patrick,EPA
Asheville Regional Office
Mooresville Regional Office
Winston-Salem Regional Office
Compliance
Environmental Sciences
Permits &Engineering

A. ().EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 2111anialle
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 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristic Discharge Limitation! Monitoring Requirements
Lbs/day Units (specify Measurement Sample *Samnle
Mon. Avg. Daily Max Mon. Avg. Daily Max. Frequency Type Location
Flow Daily Pump Logs E
Temperature Degrees C (F) 35(95) Daily Grab E
Temperature** Daily * * U,D
* Sample locations: 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 degrees Celsius (5 degrees F), herein after referred to as the Delta T, and in no case cause the ambient water
temperature to exceed 32 degrees Celsisus (89.6 degrees F). The Delta T shall be the difference between the daily average upstream
temperatue and the daily average downstream water temperature. The ambient water temperature shall be defined as the daily average
downstream water temperature.
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.

/04/90 13:17 $704 382 2091 FPD OPS & TECH 2.ar Z 001
000
0
II (1 Duke Power Company (�Od).? 1-0011
I Fossil Production Department
PO. Bar 1001 •
Charlotte.NC 28201400 /
N. C. DEPT. OF NATURAL
.,.s AND
e t'
!auatramni DUKE POWER .
JUN191991 �fr "n.9
June 4, 1991 g�
DIVISION OF ENVIR)h LNT9i ivr',N?GEMENT t ^ , w `( '�.�
MOORESVILLE REGIONAL OFFICE
Mr. Dale Overcash, Supervisor
Permits and Engineering Section
North Carolina Department of Environment,
Health, and Natural Resources
512 N. Salisbury Street
Raleigh, North Carolina 27611
Subject: Riverbend Steam Station
NPDES Permit NC0004961, Outfall 001
Proposed Change to Downstream Thermal Monitor Depth
File: RB-702.15, 704.00
Dear Mr. Overcash:
As we discussed by phone this morning, Riverbend Station has been unable to
maintain compliance with its thermal 5°F Delta T discharge limit during this
past week. Verification that the downstream monitoring equipment is reporting
accurate data was completed late yesterday afternoon. Subsequently, the
station is being brought off line today because of our inability to meet this
limit.
We request that you consider the following proposal which we believe would
more accurately reflect thermal conditions in Mountain Island lake, and contin-
ue to provide adequate protection for the environment.
We propose that the downstream thermal monitoring at Mountain Island dam be
changed from a depth of one foot to a depth of twenty feet because the deeper
water temperatures more accurately reflect the impact of station operations.
As indicated on the attached figure, the intake water during operation of
Cowans Ford Hydro represents a mixed thirty-five foot column of water which
has flowed over the submerged weir in Lake Norman. We feel that a downstream
monitoring location depth of twenty feet (approximately one-half the thir-
ty-five foot column height) would give a much fairer comparison point than
surface water temperatures in Mountain Island Lake. Indeed, meteorological
conditions and not station operations are the decisive factor in the Mountain
Island Lake surface water temperatures.
We would appreciate a response to this request at the earliest possible time.
Station operation is needed for the burning of PCB contaminated oil which has
stockpiled on the system. We would like to note that because the depth of the

6/04/90 13:17 $704 382 2091 FPD OPS & TECH CJ002
Mr. Dale Overcash
June 4, 1991
Page two
current downstream monitor resulted from a verbal agreement reached between
NCDEM and Duke, we feel that this request can be addressed in an informal
manner without the necessity of a permit modification.
Very truly yours,
O/ •�"� i6ww"`r
Phil R. Hammond, P.E.
Fossil Environmental Compliance
PRH:np
cc: Keith Sipe
Bob Drum
Quincy Corey
Stan Watkins

6/04/90 13:18 $704 382 2091 FPD OPS & TECH Q 003
DUKE POWER COMPANY
Form 00184(R488)
Station RAMP 6e,IoA Unit Rev, File No. Sheet Of
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6/04/90 13:19 e704 382 2091 FPD OPS & TECH Q 004
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Irj?ir
d�.A^'to
State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street• Raleigh,North Carolina 27611
James G. Martin, Governor George T. Everett. Ph.D.
William W. Cobey, Jr., Secretary Director
June 18, 1991
Mr. Phil Hammond, PE
Fossil Environmental Compliance
Duke Power Company
Fossil Production Department
PO Box 1007
Charlotte, NC 28201-1007
N. C. 1= • car NA-rURAL
. ., Subject: NPDES Permit No. NC0004961
CpM V 1.:: NiENT Riverbend Steam Station
Gaston County
JUN 1 9 1991
IVISt N OF ENVliL,.. ; G_"�ENT
Dear Mr. Hammond:MQQRESVILLE RENAL OFFICE
The Division of Environmental Management (DEM) has reviewed your letters of June 4,
1991, and June 10, 1991 , concerning the monitoring procedure at the downstream monitoring
site for Riverbend Steam Station. This letter is issued to modify the downstream monitoring
requirements as follows. Downstream monitoring for the station shall occur at the existing
monitoring site which is within 100 feet of the dam and shall be recorded at three foot intervals
starting at one foot below the surface and ending at 25 feet below the surface. Duke Power shall
report the average of the nine temperature readings on its Discharge Monitoring Report to
determine compliance with the permit limitations. The DEM requests that the individual readings
be kept on file for future review. This could be beneficial information for future studies of the
lake.
In the interim period prior to installation and operation of the new equipment. Duke
Power Company may elect to continue to monitor at its existing location one foot below the surface
for compliance purposes. The only other monitoring option that the DEM will agree with during
this interim period is to manually monitor the temperature at the dam. This monitoring shall
consist of recording temperatures at three foot intervals starting at one foot below the surface and
ending at 25 feet below the surface. Duke Power shall report the average of the nine temperature
readings on its Discharge Monitoring Report to determine compliance with the permit limitations.
Duke Power shall specify whether each entry on the Discharge Monitoring Report is the result of
one reading at one foot below the surface or if it is the result of an average of the nine readings.
Pollution Prevention Pays
P.O.Box 29535,Raleigh,North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

itgp
Nmmond
Page Two
This letter becomes a part of and should be attached to the existing Permit No.
NC0004961 for Riverbend Steam Station. 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 dated December
6, 1983.
If any parts, measurement frequencies or sampling requirements contained in this
permit are unacceptable to you, you have the right to an adjudicatory hearing upon written
request within thirty (30) days following receipt of this letter. This request must be in the form
of a written petition, conforming to Chapter 150E of the North Carolina General Statutes, and a-
filed with the Office of Administrative Hearings, Post Office Drawer 27447, Raleigh, North
Carolina 27611-7447. Unless such demand is made, this decision shall be final and binding. '-
kV'
If you have any questions concerning this permit, please contact Mr. Dale Overcash at
telephone number 919/733-5083. .y
cerely,
11
eorge T. Eve
cc: Mr. Jim Patrick, EPA
siewimgriMMI,1/45Tiln
Compliance
Central Files
s z

iRl itf 1.0 COM1:
DIV75, r;
State of North Carolina 44-; ,T.Nj
Department of Environment, Health and Natural ResO'iE ce tiL!J 1 OFFICE
�
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G.Martin,Governor George T.Everett,Ph.D
William W.Cobey,Jr.,Secretary Director
October 30, 1991
Mr. Timothy Huffman, Design Engineer
Design Engineering Department
Duke Power Company
Post Office Box 33189
Charlotte,North Carolina 28242
Subject: Permit No. NC0004961
Authorization to Construct
Duke Power Company
Riverbend Steam Station
Wastewater Treatment Facility
Gaston County
Dear Mr.Huffman:
A letter of request for an Authorization to Construct was received July 5, 1991 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 12,500 GPD domestic wastewater treatment system
consisting of a distribution box followed by three 4,000 gallon septic tanks in parallel, a 1,200 gallon
holding tank with dual 55 GPM pumps and high water alarms, and the continued use of the existing ash
basin for final treatment with discharge of treated wastewater into the Catawba River.
This Authorization to Construct is issued in accordance with Part III paragraph A of NPDES
Permit No. NC0004961 issued November 30, 1989, and shall be subject to revocation unless the
wastewater treatment facilities are constructed in accordance with the conditions 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 approved by the North Carolina Division of Environmental Management.
In the event that the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those as may be required by this
Division, such as the construction of additional or replacement wastewater treatment or disposal facilities.
Regional Offices
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 919/733-2314 919/946-6481 919/395-3900 919/896-7007
Pollution Prevention Pays
P.O.Box 29535,Raleigh,North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

rmit No. NC0004961
Authorization to Construct
October 30, 1991
Page 2
The Mooresville Regional Office, phone no. [phone], shall be notified at least forty-eight
(48) hours in advance of operation of the installed facilities so that an in-place inspection can be made.
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.
Upon completion of construction and prior to operation of this permitted facility, a certification
must be received from a professional engineer certifying that the permitted facility has been installed in
accordance with the NPDES Permit, this Authorization to Construct and the approved plans and
specifications. Mail the Certification to the Permits and Engineering Unit, P.O. Box 29535, Raleigh, NC
27626-0535.
Upon classification of the facility by the Certification Commission, the Permittee shall employ a
certified wastewater treatment plant operator to be in responsible charge of the wastewater treatment
facilities. The operator must hold a certificate of the type and grade at least equivalent to the classification
assigned to the wastewater treatment facilities by the Certification Commission. Once the facility is
classified, the Permittee must submit a letter to the Certification Commission which designates the operator
in responsible charge within thirty days after the wastewater treatment facilities are 50% complete.
A copy of the approved plans and specifications shall be maintained on file by the Permittee for the
life of the facility.
A leakage test shall be performed on the septic tanks and dosing tank to insure that any exfiltration
occurs at a rate which does not exceed twenty (20) gallons per twenty-four(24) hour per 1,000 gallons of
tank capacity. The engineer's certification will serve as proof of compliance with this condition.
Failure to abide by the requirements contained ip this Authorization to Construct may subject the
Permittee to an enforcement action by the Division of Environmental Management in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
The issuance of this Authorization to Construct does not preclude the Permittee from complying
with any and all statutes, rules, regulations, or ordinances which may be imposed by other government
agencies (local, state, and federal) which have jurisdiction.
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. Dana Bolden, telephone number 919/733-
5083.
Sinc ely, I /
1
George T. Ev:
cc: Gaston County Health Department
Training and Certification Unit

it No. NC0004961
Authorization to Construct
October 30, 1991
Page 3
Engineer's Certification
I, , as a duly registered Professional Engineer in the State of North
Carolina,having been authorized to observe (periodically,weekly, full time) the construction of the
project, , for the
Project Name Location
Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation
of the construction such that the construction was observed to be built within substantial compliance and
intent of the approved plans and specifications.
Signature Registration No.
Date

rIED STATES
'ENT OF THE INTERIOR
)LOGICAL SURVEY
.65
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DIVISION OF ENVIRONMENTAL MANAGEMENT
August 2, 1991
MEMORANDUM TO: Dana Bolden
FROM: D. Rex Gleason
PREPARED BY: W. Allen Hardy WA k
SUBJECT: Authorization to Construct
Wastewater Treatment Facilities at
Riverbend Steam Station
ACA0004961
Gaston County, North Carolina
Staff of this Office have reviewed plans and specifications
as submitted for the proposed wastewater treatment facilities for
the Riverbend Steam Station. This Office has no objections to
the proposed changes and recommends issuance of an Authorization
to Construct pending a final review by the SERG.
The SERG should insure that the facilities are adequate in
size and treatment capabilities.
If you have any questions, please advise.
WAH: se

/r /
der N. C. DEPT. OT NATUtcAl,41'
�/ �) /( �? PT:r;z �S AND
\,/t
II Ilia �,� Ct;.,.,;;, r, ,PATENT,
jUL 2 3 1991
State of North Carolina\)\(1j11
cDepartment of Environment, Health and Natural Rgp-ces ,F��EKT
Division of Environmental Management (n,'f., j OFFICE P�rlr' I�L. J.,.�
512 North Salisbury Street•Raleigh,North Carolina 27611
James G. Martin, Governor George T. Everett,Ph.D.
William W. Cobey,Jr., Secretary Director
July 10, 1991
k(K1
MR TIMOTHY L. HUFFMAN
DUKE POWER COMPANY
t PO BOX 367
1 MOUNT HOLLY, NORTH CAROLINA 28120
Subject: Application No. ACA0004961
Riverbend, SE; Amendment
Authorization To Construct
Gaston County
Dear MR HUFFMAN:
The Division's Permits and Engineering Unit acknowledges receipt of your permit application and
supporting materials on July 5, 1991. This application has been assigned the number shown above.
Please refer to this number when making inquiries on this project.
Your project has been assigned to Dana Bolden for a detailed engineering review. A technical
acknowledgement will be forthcoming. If this acknowledgement is not received within thirty (30)
days, please contact the engineer listed above.
Be aware that the Division's regional office, copied below, must provide recommendations from the
Regional Supervisor or a Procedure Four Evaluation for this project, prior to final action by the
Division.
If you have any questions,please contact Dana Bolden at [phone].
Sincerely,
Lit.C -(-t-ct dlt10-4
( L di Donald Safrit, P.E.
'wJ Supervisor, Permits and Engineering Unit
cc: 111111.111111111111111111111111ftm
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

fluky Power Company (7O.1)3734011
PO Box 33/S9
Charlotte. A('2'212
N. C. fEPT. Or s•t-r! AL
ce>
NT
OE' DUKE POWER 1991
MITT
-,.:,-i OFFICE
June 26 , 1991
SU1. 5 1
Mr. Dale Overcash
North Carolina Department of Environment,
Health, and Natural Resources
NPDES Group, Water Quality Section
512 N. Salisbury Street
Raleigh, NC 27611
Re: Riverbend Steam Station, Gaston County
NPDES Permit #NC0004961, Outfall 002
Upgrade of Domestic Wastewater Treatment System
Application to Construct
File Nos: RS-398 and RS-153
Dear Mr. Overcash:
Duke Power Company requests authorization to construct an upgrade
of the domestic wastewater system at our Riverbend Steam Station.
This upgrade will improve the ash basin discharge water quality
and will not result in the violation of any NPDES permit effluent
limitations. For your review, three copies of the project
description, calculations, plans, and specifications are
attached.
This project will replace the existing 3000-gallon septic tank
which provides primary treatment with three 4000-gallon septic
tanks installed in parallel. Secondary treatment will continue
to be provided by the ash basin. The design flow of the existing
system is 2500 gpd. The design flow of the upgraded system will
be 12, 500 gpd, of which approximately 3800 gpd is attributable to
station personnel and the remaining 8700 gpd to personnel
temporarily on site for station outages . A significant portion
of the increased flow will be due to the planned future
connection of shower facilities for use by the temporary outage
work force.

A
ii
Mr. Dale Overcash
Page 2
June 26 , 1991
If you have any questions on this project, please contact me at
( 704) 382-1580 .
Sincerely,
Timothy L. Huffman, Design Engineer
Engineering Support Division
Design Engineering Department
TLH/sh:t1h83
Attachments
cc w/attach: P. R. Hammond
cc w/o attach: W. J. McCabe
M. G. LaRocque
B. G. Foley
Central Records

Project Description
Subject : Riverbend Steam Station
PT• or NATURAL
Sanitary Waste Treatment System JUL 5 1991
FPD-RB-0110A; Task 3881A
File : RB-0110A
WID #72100110C . 9/
Revision: 2
Purpose 331,1.
ificE
Provide a sanitary waste treatment system for Riverbend Steam
Station that will effectively treat the normal plant sewage load
and treat the periodic additional sewage load during unit
outages .
Detail Project Description
The following items will be covered in the subject project :
1 ) Install three 4000 gallon septic tanks as shown Appendix A
for treating the primary waste from the plant . The new
septic tanks will be located at the site of the present
septic tank. Septic tank "A" should be installed adjacent to
the presently operating septic tank. Once septic tank "A" is
functional , the old septic tank should be removed and re-
placed with septic tanks "B" and "C" .
2 ) The septic tanks should be installed in parallel with a
distribution box provided to balance flow between the tanks
and isolate each tank during periodic maintenance .
3 ) A 1200 gallon concrete holding tank will be installed
downstream of the three septic tanks . The septic tanks will
gravity feed this tank. Two dewatering pumps , controlled by
level switches , will pump the effluent from the holding
tank to the yard drainage system. The yard drainage pumps
will discharge to the ash basin for final treatment .
4 ) Utilize the existing underground pining from the Power
Building to the existing sanitary manway. New underground
piping will connect the sanitary manway, distribution box,
septic tanks, holding tank, and yard drainage manway.
5 ) Electrical power will be required for the holding tank
dewatering pumps . Level switches will control the operation
of the pumps . One pump will normally start to empty the
holding tank. If the inflow exceeds the capacity of the
first pump, the second pump will start . Both pumps will
stop at low level . Alternate the lead pump. A holding
tank high level alarm will annunciate in the control room.
1

j
Project Description
June 24, 1991
6) Obtain a permit from the state of North Carolina to allow
for the operation of the waste treatment system.
7) Abandon the existing waste treatment system. Pump out the
existing septic tank and dispose of the accumulated sludge.
MCFF
A) Provide lead responsibilities
B) Provide pump and system data sheets
C) Size piping
D) Provide waste treatment system flow diagram
MCFE
A) Procure pumps. Preliminary data:
Two ( 2)- 1 HP dewatering pumps with electrical motors, to
be located outdoors
B) Procure piping. Preliminary data:
60 feet of 2-1/2" sch 40 PVC pipe
50 feet of 4" sch 40 PVC-DWV pipe
MCFP
A) Provide piping design drawings
CSEA
A) Submit required permits to the state of North Carolina.
Provide Closure Plan.
CCFS
A) Provide layout drawings
B) Procure three 4000 gallon concrete septic tanks
C) Procure concrete holding tank and distribution box
D) Design a berm barrier wall
ECFH
A) Provide power to two 1 HP dewatering pumps
B) Procure level switches to start and stop the dewatering
pumps
C) Provide a high level alarm for the holding tank which will
annunciate in the control room
2

1
Project Description
June 24 , 1991
CMD
A) Install the new septic tanks , distribution box, holding
tank, and piping
B) Install electrical cable
C) Excavate site for septic tanks and holding tank
3

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Form 00184(R4-88)
. • S lion Unit Rev. File No. Sheet Z Of (L
Subject
By Date
Prob No. Checked By Date
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Form 00184(R4-88)
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Station Unit Rev. File No. Sheet 3 Of 1�
Subject jBy Date
li Prob No. Checked By Date
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Form 00184(R4-88)
. Station Unit Rev. File No. Sheet 4 Of_
Subject
By Date
Prob No. Checked By Date
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Form 00184(R4-88)
Station Unit Rev. File No. Sheet S Of “z.
Subject
By Date
Prob No. Checked By Date
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DUKE POWER COMPANY
Form 00184(R4-88)
Station Unit Rev. File No. Sheet C. of I(
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Subject
By Date
Prob No. Checked By Date
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Form 00184(R4-88) e
Station Unit Rev. File No. Sheet 7 Of l .
Subject
By Date
Prob No. Checked By Date
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DUKE POWER COMPANY
Form 00184(R4-88)
Station Unit Rev. File No. Sheet 3 Of__
Subject
By Date
Prob No. Checked By Date
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' DUKE POWER COMPANY
Form 00184(R4-88)
Station Unit Rev. File No. Sheet 8/ Of 110
Subject
By Date
Prob No. Checked By Date
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Form 00184(R4-88)
Station Unit Rev. File No. Sheet Of�
Subject
By Date
Prob No. Checked By Date
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DUKE POWER COMPANY
r
Form 00184(R4-88)
t •
Station Unit Rev. File No. Sheet_110 of
Subject
By Date
Prob No. Checked By Date
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DUKE POWER COMPANY
Form 00184(R4-88)
• Station
Unit Rev. File No. Sheet ( 1 Of �L
Subject
By Date
Prob No. _ Checked By Date
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Form 00184(R4-88)
'
Station fZ Unit-4 Rev._ File No. Sheet E 1 14 of tC.
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j Form OOi84(R4-88)
t i
Station /23 Unit /Pi Rev. File No. Sheet , Of l b
Subject (A) 1/14 5Y-Cr-r-Al
By Date E1/c/ /
Prob No. Checked By �' Date L-1 7-`L
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i PUMP RECOMMENDED
SUCTION� -"
(44) (4b) (4c)
Fig.4 Keeping Air Out of Pump
Improper submergence of the pump suction line can cause a •
vortex which is a swirling funnel of air from the surface directly
into the pump suction pipe. In addition to submergence, the
location of the pipe in the sump and the actual dimensions of
the sump are also important in preventing vortexing and/or
excess turbulence.
i For horizontal pumps, Fig. 5 can be used as a guide for minimum
submergence and sump dimensions for flows up to approximately
3000 gpm. Baffles can be used to help prevent vortexing in cases
where it is impractical or impossible to maintain the required sub-
mergence. Fig. 6 shows three such baffling arrangements. -r
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VELOCITY
IN FEET PER SEC.= a 02
AREA (Inches) ra,
Fig.5 Minimum Suction Pipe Submergence and Sump Dimensions
591
19B

Q .
. 17...3� l 3 0c- l L
• Dimensions Model 3111
All dimensions in inches and (mm). Not to be used for construction.
I
M J-NO.OF '
v.DIA.HOLES • 1 •; ,.� .!
M '-2 E (19)
DISCHARGE El • 28 I 0
Group ST,S Group M.MTCI Group L
�0, 2 Motor(711)
I •;ii; i 264) (51) Franca Sfd With Std. With Std With
Ft- ..; �• i(i Up.5.8. Up. S.B. Up.S.D.
J-NO.OF TYP. 143 21'h 25%.
111L1
1 DIA.HOLES I6t0) 48 (25) (546) (657)
(tB) � (1219) 145 22'h 26'14 .
(572) (683)
OPTIONAL PIT COVER tsZ 27'h 31'h
' • GROUP ST, S, M & MT GROUP L (698) (809)
i 271/2 31 h
184
(698) (810)
I-_ 213 34 . 39 36'h 41%
(883) (9944) (927) (1057)
II
HI
S 343/4 39% 36'h 41%
(883) (994) (927) (1057)
I.
254 343/4 39'h 36'h 41%
AP28 (883) (994) (927) (1057)
APPROX.
l7t t) 36'1. 10'� 38 43'i
(921) (1032) (965) (1095)
C a1 2� 37'h 42'/. 373. 44 h
�T ._� (943) (1073) (959) ,(1140)
4 2t 37' 42'/. 373'. 44%
(13) ( S 943) (1073) (959) (1140)
324 42'4 47'/. 42'L 49'.
(1070) (1200) (1068) (1267)
_ OPTIONAL 42'�S 47'/. 42�'. 49'ti
0 ` SWITCH TCH 32e (1070) (1200) (1088) (1287)
z l'UMIN.PIT DIA. 3fi4 54% 59% 55'/. 62%
oII I S if (1387) (1518) (1403) (1584)
I a WITH FLOAT 54% 59Y 55'/. 62%
i 36S (1387) (1518) (1403) (1584)
�_ MIN.PIT DIA. t i
E. LESS FLOAT I 581/4 63N, 58'h 66
— �'i, 1
1 (1480) (1810) (1495) (1676)
58'/. 63% 58% 68
( \l(C�� �I (1480) (1610) (1495) (1676)
Gro. ST S M MT L
1 r
_
= " '
r I.
A ? rA . . = ., . J
21 21a n ^ 4 le a . r r r
♦ � r .. n ea • • • •
—11/2 2 3 2 2 3 4 2 3 4 4 3 314 4 314 6 18 8 10
8 (38) (51) (78) (51) (51) (76) (102) (51) (78) (102) (102) (76) (76) 1(102) (102) `(76) I(102) (152) 1(203) (203) (254)
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 41/2 41/2 41/2 41/2
C (76) (76) (76) (76) (76) (76) (76) (76) (76) (76) (76) (76) (76) (76) I(76) (76) (76) (114) (114) (114) (114)
8 834 9% 9 9% 10'/. 12 11% 12 123'. 14'/. 12Y 13'/ 13Y t 143/4 111/2 13'% 21'h 211/2 241/4 241/2
E
(203) (213) (232) (229) (244) (260) (305) (289) (305) (324) (362) (324) (337) (349) (375) (292) I(352) (546) (546) (616) (616)
F 20'/ 201 201 20'h 20'/ 20'/ 25 25 25 29'/ 29'h 29'h 291 29'/ (29'/ 25 29'h — — — —
(521) (521) (521) (521) (521) (521) (635) (635) (635) (749) (749) (749) (749) (749) 1(749) (635) (749) 1
22 22 22 22 22 22 261/2 261/2 261/2 31 31 31 31 31 31 261/2 31 — I —
G (559) (559) (559) (559) (559) (559) (673) (673) (673) (787) (787) (787) (787) (787) (787) (673) (787)
J 6 6 6 6 6 6 6 6 6 8 8 8 8 1 8 8 6 8 8 8 8 8
40 40 40 40 40 40 44 44 44 48 48 48 48 48 48 44 48 — — — —
M (1016) (1016) (1016)(1016) (1016) (1016) (1118) (1118) (1118) (1219) (1219){1219) (1219) (1219)11219) (1118) (1219►�
3% 3% 3% 3% 3% 334 23/4 21/4 23/4 2 2 2 2 2 2 I 23/4 2 — — _ —
N (86) (86) (86l (86) (86) (86) (70) (70) (70) (51) (51) '(51) (51) _ (51) (51) •(70) (51)
51/2 5% 43.'. 4 41/2 31/2 3 4/. 4 31/2 31/2 4'h 41/2 33/4 31/2 3Y • 3'/. 61/2 61/2 61/2 61
R (140) (137) (121) (102) (105) (89) (76) (108) (102) (89) (83) (105) (105) (96) (79) (95) (83) (165) (165) (156) (156)
141 15 161 18 18 19 221/2 21 22'h 24 261/2 25 25 28 271/2 20 2314 24 x 44
O (362) (381) (419) (457) (457) (483) (572) (534) (572) (610) (673) (835) (635) (660) (699) (508) (603) (610 x 11181
S 16Y'. 174 19'/. 19'h 19'/ 22 25 23 25 26'/ 29 26'/ 27'/ 28 30 22'/ 23'/+ 41 42 45 48
(425) (451) (489) (495) (495) (559) (635) (584) (635) (673) (737) (673) (698) (711) (762) (572) (597) (1041) (1067) (1143) (1219)
.-- ! 1511

4 1 /
1 Performance Curves Model 3171 _
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SECTION VIEW -----IF .
-__ -
CONCRETE: 4000 PSI at 28 Days REINFORCING: H-20 Bridge Load.
•
. . .
. . .
WIDTH x LENGTH x HEIGHT 876-8600
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INTERIOR DIMENSIONS -
P.O. BOX 33097
RALEIGH, N.C. 27604

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INSTRUMENTATION FUNCTIONAL REQUIREMENTS
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ASSESSMENT OF BALANCED AND INDIGENOUS
• POPULATIONS IN MT. ISLAND LAKE NEAR
RIVERBEND STEAM STATION
N.O. DEPT. OF
ENVIRONMENT, HEALTH,
& NATURAL RESOURCES
•
JUN 23 19941
DIVISION OF ENVIRONMENTAL MANAGEMENT
MOORESVILLE REGIONAL OFFICE
CALEMMIIVO
DUKEPOWER
sW k, I
RV�
DUKE POWER COMPANY
RIVERBEND STEAM STATION
1111 MAY 1994

• TABLE OF CONTENTS
PAGE
EXECUTIVE SUMMARY i
LIST OF TABLES ii
LIST OF FIGURES iii
CHAPTER 1 - INTRODUCTION 1-1
•
CHAPTER 2 - STATION OPERATION 2-1
CHAPTER 3 -WATER CHEMISTRY AND SEDIMENT 3-1
CHAPTER 4 - BIOLOGICAL EVALUATION 4-1
•
•

• EXECUTIVE SUMMARY
* Per agreement with the North Carolina Department of Environment, Health, and
Natural Resources (NCDEHNR) and the Riverbend Steam Station (RSS) NPDES
permit (NC0004961), an assessment of annual monitoring data for water quality and
trace element sampling that was initiated in 1988 and macroinvertebrate and fish
sampling that was initiated in 1990 at selected locations in Mt. Island Lake is
reported.
* Water chemistry and trace element data collected from 1990 through 1993 is
presented and is similar to that previously reported to NCDEHNR for 1988 and 1989
sample years Data indicated that the water chemistry of Mt. Island Lake was typical
of Piedmont lakes and that concentrations of trace elements were below North
Carolina water quality standards, safe drinking water standards, and most below
detection limits. Measurable quantities of trace elements in fine-suspended
sediments and fish tissue were detected and did not appear to be a threat to fish or
human health.
• * An assessment of balanced and indigenous population data collected from 1990
through 1992 was submitted in a report to NCDEHNR in 1993 to review Duke
Power Company's request to modify the 50F (2.80C) AT limit of the Station
NPDES permit to base the AT limit on the EPA nomograph. The proposed
modification was approved by NCDEHNR in July 1993 and bases the AT limit on
the difference between the Station's daily average discharge and inlet water
temperatures per the EPA nomograph.
* The monthly average end-of-pipe thermal limit of 950F was not exceeded.
* The daily average temperature did not exceed the 89.60F downstream permit limit.
* The daily average discharge temperature was within the limits of the EPA
nomograph
• 1

• * Comparison of RSS operation and environmental monitoring data indicate that
balanced and indigenous populations continue to exist in Mt. Island Lake in the
vicinity of RSS and that the modified thermal limits should be maintained when the
Station NPDES permit is renewed.
•
ii

• LIST OF TABLES
PAGE
Table 3-1 In-situ water quality parameters in Mt. Island Lake in 1990 3-4
Table 3-2 In-situ water quality parameters in Mt. Island Lake in 1991 3-6
Table 3-3 In-situ water quality parameters in Mt. Island Lake in 1992 3-7
Table 3-4 In-situ water quality parameters in Mt. Island Lake in 1993 3-8
Table 3-5 Water chemistry in Mt. Island Lake in 1990 3-10
Table 3-6 Water chemistry in Mt. Island Lake in 1991 3-11
Table 3-7 Water chemistry in Mt. Island Lake in 1992 3-12
Table 3-8 Water chemistry in Mt. Island Lake in 1993 3-13 •
Table 3-9 Concentrations of cations in Mt. Island Lake from 1990 - 1993 3-14
Table,3-10 Concentrations of trace metals in Mt. Island Lake from 1990 - 1993 3-17
Table 3-11 Maximum concentrations of trace element in Mt. Island Lake 3-20
Table 3-12 Calculated arsenic and selenium loading from RSS ash basin 3-21
Table 4-1 Density and taxa of macroinvertebrates collected in Mt. Island Lake 3-6
Table 4-2 Macroinvertebrates collected in Mt. Island Lake in July 1991 3-7
11111 Table 4-3 Macroinvertebrates collected in Mt. Island Lake in July 1992 3-10
Table 4-4. Macroinvertebrates collected in Mt. Island Lake in July 1993 3-13
Table 4-5 Species of fish collected in Mt. Island Lake near RSS in July 3-21
Table 4-6 Number of fish species collected in April 1993 near RSS 3-22
Table 4-1 Predicted percent availability of RSS based on historical river flow 4-4
• - iii

4110
LIST OF FIGURES
PAGE
Figure 1-1 Riverbend Steam Station study area 1-3
Figure 2-1 Daily average heat input to Mt. Island Lake from RSS 2-4
Figure 2-2 Daily average intake temperatures of RSS 2-5
Figure 2-3 Daily average discharge water temperatures of RSS 2-6 •
Figure 2-4 Daily average CCW AT's for RSS 2-7
Figure 2-5 Daily average water temperatures downstream of RSS 2-8
Figure 2-6 EPA nomograph versus intake and discharge temperature of RSS 2-9
• -
Figure 3-1 Arsenic concentrations in fine suspendable sediments 3-24
Figure 3-2 Selenium concentrations in fme-suspendable sediments 3-24
Figure 4-1 Densities of pelagic fish in Mt. Island Lake near RSS 4-19
Figure 4-2 Mean selenium concentrations in carp from Mt. Island Lake 4-20
Figure 4-3 Mean selenium concentrations in sunfish from Mt. Island Lake 4-21
Figure 4-4 Mean selenium concentrations in largemouth bass in Mt. Island Lake 4-22
Figure 4-5 Mean zinc concentrations in carp from Mt. Island Lake 4-23
Figure 4-6 Mean zinc concentrations in sunfish from Mt. Island Lake 4-24
• Figure 4-4 Mean zinc concentrations in largemouth bass in Mt. Island Lake 4-25
iv

• CHAPTER 1
INTRODUCTION
Per agreement with the North Carolina Department of Environment, Health, and Natural
Resources (NCDEHNR), annual monitoring of macroinvertebrates and fish at selected
locations in the Mt. Island Lake was initiated in 1990. The objective of this on-going
monitoring program is to provide data to assess balanced and indigenous populations with
respect to operation of Riverbend Steam Station (RSS) and evaluate renewal of thermal
limits in the Station NPDES permit (NC0004961). The monitoring data collected from
1990 through 1992 was submitted in a report to NCDEHNR (Duke Power Company 1993) •
to review Duke Power Company's request to modify the 5°F (2.8°C) AT limit of the
Station NPDES permit to base the AT limit on the EPA nomograph. The proposed
modification was approved by NCDEHNR in July 1993 and bases the AT limit on the
difference between the Station's daily average discharge and inlet water temperatures per
the EPA nomograph (EPA 1976). The thermal limit of the Station per the EPA
nomograph is:
•
* When inlet water temperature is below 36.5°F (2.5°C), then the daily average
discharge water temperature limit is 50°F (10°C), or
* When inlet water temperatures range from 36.5°F (2.5°C) to 55°F
12.8°C), then the daily average discharge water temperature limit is [two times the
intake water temperature (°F) minus 23°F].
Other thermal limits of the Station are an average monthly discharge limit of 95°F (35°C)
and a daily average downstream limit of 89.6°F (32°C). The downstream compliance
monitoring location is located approximately 1 mi downstream of the Station (Figure 1-1).
The data collected in 1993 will be the emphasis of this report.
•
1-1

• LITERATURE CITED
Duke Power Company. 1993. Thermal limit evaluation report for Riverbend
Steam Station. Duke Power Company, Charlotte, NC.
Environmental Protection Agency. 1976. Quality criteria for water.
EPA-440/9-76-023.
•
• 1-2

�. 279.0
NC Hwy 73
LINCOLN COUNTY
1I
MECKLENBURG COUNTY
--------------
GASTON COUNTY 1
•
Imo'
•
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4011.1 77.
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• I \\
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Ate •ti I. 7e 276.5 ----
N. -- 2-- 9 277.0
/ • Mountain
a4 ' ; Island
5.0 Reservoir
275.5
272.0 � fish locations monitored in the spring
monitoring locations
Figure 1-1. The Mt. Island Lake study area.
•
1-3

CHAPTER 2
•
STATION OPERATION
BACKGROUND INFORMATION
Riverbend Steam Station (RSS) is located on the 15-mi long Mt. Island Reservoir just
northeast of Charlotte, North Carolina (Figure 1-1). The four fossil-fired steam generating
units (units 4, 5, 6, and 7) have a combined rated capacity of 454 MWe-net. Units 4 and 5
began commercial operation in 1952 and units 6 and 7 followed in 1954. Note that units
1, 2, and 3 (which had a combined rated capacity of 165 MW-gross) were retired from
operation in the late-1970's. The intake and discharge structures for once-through
condenser cooling water (CCW) are located approximately 6 mi and 14 mi downstream
from Cowans Ford Hydroelectric Station (located on Lake Norman), respectively. In
addition, the discharge structure is approximately 1 mi upstream from Mt. Island
Hydroelectric Station (Figure 1-1). Each steam generating unit has two CCW pumps and
station personnel operate either one or two pumps per unit depending on intake water
• temperature, discharge temperature limits, and operational efficiency. The maximum
pumping capacity of the CCW system is 642 cfs.
Starting in 1984, RSS units 4, 6, and 7 entered into a plant modernization program (PMP)
in which the units were rebuilt and modernized. Note that unit 5 did not undergo PMP.
The PMP schedule (listed below) was staggered so all of the units would not be down at
the same time. Because of the staggered schedule, all four units were not able to operate at
the same time until 1993.
RSS Plant Modernization Program (PMP) Schedule
Start Completion
Unit 4 August 1987 June 1990
Unit 5 No PMP No PMP
Unit 6 September 1985 September 1991
Unit 7 October 1986 February 1993
• 2-1

• Prior to PMP, RSS did not have the ability to run one of the two CCW pumps dedicated to
each unit by itself. Thus, whenever a unit was on-line, both pumps were operating. As
each unit came out of PMP, the design had been modified to allow the pumps to work
independently, thus giving station personnel greater flexibility in controlling station
discharge temperatures and at the same time running the units more efficiently. For
example, during the winter months when intake temperatures are cooler, RSS ran one
CCW pump per operating unit. By not running the second pump, auxiliary loads at the
station were reduced. During the warmer summer months, two pumps per operating unit
were run to help reduce station discharge temperatures.
Operations per the EPA nomograph guidelines was initiated on 7/26/93, and thus, the •
rational behind CCW usage changed. The most significant impact of operating per the
EPA nomograph guidelines is that during the coldest portions of the winter months, two
CCW pumps per unit may have to operate to reduce the difference in temperature (AT)
between ambient and the station's discharge water. This ensures that the downstream biota
is protected from possible cold shock resulting from rapid shut-down of all operating units.
• THERMAL DATA
The heat load into Mt. Island Reservoir resulting from operation of the CCW system at
RSS (in Million British Thermal Units per hour, MBTU/hr) for the period January 1, 1990
through December 31, 1993 is shown in Figure 2-1. The heat loading to the reservoir is
dependent upon the rate at which heat is dissipated from the station's condensers to the
CCW system. For example, if the water temperature in the CCW system increases by
100F from intake to discharge and all of the CCW pumps are running (i.e., 642 cfs),
approximately 1500 MBTU/hr of heat will be added to the reservoir. Note that a BTU is
the amount of heat required to raise one pound of water one degree Fahrenheit.
The "open" spaces in Figure 2-1 indicate when RSS was off-line and no heat was being
added to Mt. Island Lake. For most of the 4-yr period shown in Figure 2-1, RSS's
operation was similar to that of a peaking facility with periods of heavier generation in the
summer and winter months and sporadic generation the rest of the year. For the 4-yr
period, the peak heat loading actually occurred during the spring of 1993. On 3/15/93 the
peak heat loading was 2129 MBTU/hr with a CCW flow rate of 581 cfs and a CCW AT of
• 16.30F. This essentially represents full-load conditions at RSS. Note how the yearly
2-2

• amount of heat added to Mt. Island Reservoir increases from 1990 through 1993. This
"stair-step" increase is most likely the result of units coming out of PMP and starting to
generate electricity, thus adding heat to the reservoir.
Daily average ambient water temperatures taken at the stations intake structure are shown
in Figure 2-2. These temperatures follow a regular seasonal pattern reaching the mid-
80°F's during the summer and falling into the mid-40°F's during the winter.
RSS has a monthly average discharge (i.e., end-of-pipe) temperature limit of 95°F. Daily
average discharge temperatures taken at the station are shown in Figure 2-3. During the
winter months, recorded discharge temperatures have been as low as 50°F (just slightly •
above ambient) on occasion. During the summer months, daily average discharge
temperatures can reach the mid- to upper-90°F's, however, during the 4-yr period shown
in Figure 2-3, the monthly average discharge temperatures never exceeded the 95°F limit.
The daily average CCW OT's when the CCW pumps were running are shown in Figure 2-
4. Note that these temperatures represent the difference between Figures 2-3 and 2-2, the
• discharge and intake temperatures, respectively. During the past 4 years, the CCW L T's
typically ranged between 10-15°F on a year-round basis, but did reach 20°F on occasion
during the spring of 1993 and 26°F once during the fall of 1990. Since the EPA
nomograph went into effect on 7/26/93, the CCW AT is now dictated per its guidelines.
Daily average water temperatures in the forebay of Mt. Island Hydroelectric Station
(approximately 1 mile downstream from RSS's discharge structure) are shown in Figure 2-
5. These temperatures typically ranged from the mid- to upper 40°F's during the winter
months to the mid- to upper 90°F's during the warmest portions of the summer months.
The daily average downstream temperature limit for RSS is 89.6°F. As shown in Figure
2-5, this limit was slightly exceeded once during the summer of 1991 and twice during the
summer of 1993 (the warmest summer on record). Corrective action was taken on all three
occasions by reducing load on one or more units to maintain the downstream temperature
at or below 89.6°F.
As mentioned earlier, RSS began operating per the EPA nomograph guidelines on 7/26/93.
Prior to that date, and since that date, these guidelines have not been exceeded (Figure 2-
1111 6), thus ensuring protection of the downstream biota.
2-3

• • •
2500
H = 2129 MBTU/h
CCW Delta T = 16.3 F
CCW = 581 cfs
2000
r I
�' 1500
col—
N L-
4, a
z
1000
s
500 LL04_ 1
1/1/90 7/2/90 12/31/90 7/1/91 12/30/91 6/29/92 12/28/92 6/28/93 12/27/93
DATE
Figure 2-1 : Daily average heat input to Mtn. Island Reservoir from Riverbend Steam Station (1/1/90 - 12/31/93).

• S S .
100.0
90.0
80.0 f tk tiqvvik\ii
i a '
0 I
70.0
LL.1 1 ' l kJ\
60.0 4
�' kt
i � J
50.0 �i 1 �
d
40.0
30.0
1/1/90 7/2/90 12/31/90 7/1/91 12/30/91 6/29/92 12/28/92 6/28/93 12/27/93
DATE
Figure 2-2: Daily average intake temperatures at Riverbend Steam Stat+on (1/1 /90 - 12/31/93).

• • • .
100.0
ia
90.0 lIMr Pi - 11
ith ,T11 ' /
lif ii—t:
80.0 t) I 4
d
70.0 N N , 1
W 60.0
I.
F- I I
50.0
40.0
30.0
1/1/90 7/2/90 12/31/90 7/1/91 12/30/91 6/29/92 12/28/92 6/28/93 12/27/93
DATE
Figure 2-3: Daily average discharge temperatures at Riverbend Steam Station (1/1/90 - 12/31/93).

• S • .
30.0
25.0
'L' 20.0 -
rn
d
H
< 15.0 i
I
N J
111� h ► '
vo 10.0 I j {
I
} 1
, 0— i I
5.0
i I 1 H 1
0.0 1 I T
1/1/90 7/2/90 12/31/90 7/1/91 12/30/91 6/29/92 12/28/92 6/28/93 12/27/93
DATE
Figure 2-4: Daily average CCW Delta T's at Riverbend Steam Station (1/1/90 - 12/31/93).

O • • .
100.0
90.0I
80.0
i \AI\6\41 4
Li
rn r J
— 70.0 1
1
i == vo
h M
°O ► r
ce1. 60.0 •
•
III/
\\., /W
I_
50.0 jAll W
40.0
30.0 1 i
1/1/90 7/2/90 12/31/90 7/1/91 12/30/91 6/29/92 12/28/92 6/28/93 12/27/93
DATE
Figure 2-5: Daily average temperatures at Mtn. Island Dam (i.e. downstream frtm RBSS) (1/1/90 - 1 2/31/93).

1111
100.0
so ,11
0 re
. AI
ir - !in.
• 'dam
90.0 � :�ti ; •
•-j. —
eel■ 6 or
❑■
99 id
4r -ig-A cfp
❑
ac
g �i. p ,.1i, .. ° fir,
IIIa.
tam NINE,■ II'
rrr■ ■r
W 60.0 . ..a- ■■ n°
p ■ •• On ■ err ❑
Q 1
v I °❑ `�,, ° pre-EPA nomograph
0 50.0 '
ame • post-EPA nomograph
40.0
30.0 1
30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
INLET TEMPERATURE (deg F)
III
Figure 2-6. EPA nomograph (black line) superimposed on RBSS operational data (1/1/90 through
12/31/93). The EPA nomograph went into effect on 7/26/93. Data points above the line indicate
exceedences of the EPA nomograph guidelines.
2-9

110
CHAPTER 3
WATER CHEMISTRY AND SEDIMENT
Methods
Water samples and in-situ measurements (temperature, dissolved oxygen, etc) were taken
at Locations 272.0, 275.0 277.0, 277.3, 277.5, 277.6, 16.0, and 279.0 (Figure 1-1).
Sediments were sampled at four locations: 16.0, upstream of the RSS intake,: 277.6,
upstream of RSS ash basin discharge: 277.5, downstream of the RSS ash basin discharge;
275.0, lake forebay. Vertical profile measurements (in one-meter increments) of water •
temperature, dissolved oxygen, pH, and specific conductance were obtained in-situ using a
water quality analyzer (Hydrolab Datasonde III). Water samples were collected in
polyethylene terephthalate (PET) bottles. Samples for metals analysis were acidified; all
other samples were stored on ice until analyses were performed. Analytical methods used
to analyze samples were the same as those previously reported (Duke Power Company
1988 and 1990). Water chemistry samples for Mt. Island Lake were collected during
• February and July/August from 1990 through 1993.
A K.B. core sampler was used to collect ten sediment cores from each sampling location
on July 30, 1990. The sediment cores were stored on ice and returned to the laboratory,
where fine-suspendable sediment was pipetted off and collected on a 0.45 µm filter. The
filters were dried at 60°C for at least 15 hours, placed in acid-washed linear polyethylene
(LPE) vials, and set to North Carolina State University, Nuclear Services Laboratory
(NCSU) for neutron activation analysis (NAA).
Descriptive statistics were performed on the water chemistry data. Concentrations of trace
elements in µg/g of fme-suspendable sediment were calculated by dividing the results from
the NAA analyses (µg/filter) by the dry weight of the sediment on each filter.
Concentrations of trace elements that were detectable, were compared to data collected in
previous years.
• 3-1

• Results and Discussion
Little spatial variabilty of water chemistry data of Mt. Island Lake collected from 1990
through 1993 was evident during the winter and summer periods, except for water
temperature and dissolved oxygen (Tables 3-1 through 3-10). This was similar to water
chemistry data collected in the preceding years and reported to NCDEHNR (Duke Power
Company 1988 and 1990).
The dissolved oxygen concentrations in the lake ranged from 1.2 to 11.6 mg/L. Specific
conductance ranged from 52 to 77 µS/cm. The lake pH was circumneutral (5.7-7.6),
while alkalinity was (10.4 to 17.1 mg-CaCo3/L). Turbidity values were low (1 - 10 •
NTU).
Nutrients were generally low and exhibited little variability, except nitrate+nitrite and total
phosphorus which were slightly higher at Location 277.3 (McDowell Creek). Ammonium,
orthophosphate, and total phosphate were usually below detection limits. Silica, chloride,
and sulfate concentrations varied slightly.
• The principal cations (sodium, calcium, potassium, and magnesium) showed little
variability; sodium was the predominant cation. Aluminum and iron were typically at the
detection limit (0.3 mg/L in 1990 and 0.1 mg/L in 1991 - 1993, respectively). Manganese
concentrations were below 0.1 mg/L.
Total solids (TS) ranged from 40 to 60 mg/L, while total suspended solids (TSS) were at
or below 8 mg/L. Total dissolved solids (TDS=TS minus TSS) were therefore relatively
low, much lower than the Safe Drinking Water Act (SDWA) limit of 500 mg/L for TDS in
drinking waters.
Concentrations of trace elements in Mt. Island Lake water were mostly below detection
limits. Concentrations were much less than North Carolina surface water quality standards
and SDWA standards (Table 3-11). Only barium, copper, and zinc concentrations were
above the detection limits (1, 0.5, and 4 µg/L, respectively). Silver was below both the
detection limit (0.2µg/L) and the SDWA limit, though the action level for surface water is
lower. Loading values (Table 3-12) for arsenic (As) and selenium (Se) from the Riverbend
11110 ash basin to Mt. Island Lake (calculated from NPDES data: flow times concentration),
3-2

showed that trace element loading to the lake was not great. Loading of Se ranged from 2
• to 145 g/day and As from approximately 20g/day to 2800 g/day. The data presented here
provide no evidence of an impact from RSS on the water quality of Mt. Island Lake.
In 1990, trace element concentrations of As and Se were detected in 58 and 55% of the
fine-suspendable sediment samples. Location 277.6 (upstream of ash basin) had the lowest
percentage of detectable trace elements: 40% had detectable levels of As and 30%Se.
Detectable concentrations of As and Se in the fine-suspendable sediments from Mt. Island
Lake during 1990 showed little obvious pattern, except for lower levels of As at Location
16 compared to the concentrations at other locations (Figures 3-1 and 3-2).
The concentrations of As reported in the sediments of Mt. Island Lake are similar to those •
reported in the sediments of other lakes that have been treated with As biocides or receive
municipal or agricultural wastes (Forstner and Wittman 1979; Moore and Ramamoorthy
1984). Selenium concentrations in Mt. Island Lake fine-suspendable sediments were
somewhat higher than selenium concentrations in whole sediment form 11 Wisconsin lake
and a South Dakota reservoir (Wiersma and Lee 1971).
• LITTERATURE CITED
Forestner, U. and G.T.W.Wittman. 1979. Metal pollution in the aquatic environment.
Springer-Verlag, Berlin. 486 pp.
Moore, J.W. and S. Ramamoorthy. 1984. Heavy metals in naural waters. Applied
monitoring and impact assessment. Springer-verlag, New York. 268 pp.
Wiersma, J.H. and G.F. Lee. 1971. Selenium in lake sediments - analytical procedure and
preliminary results. Environmental Science and Technology 5:1203-1206.
• 3-3

• Table 3-1. In-situ water quality parameters at Mt. Island Lake in 1990.
Depth Temp DO Cond
Location Date m ° C mg/L pH pS/cm
16.0 02/01/90 0.3 8.7 10.4 6.7 57
16.0 05/09/90 0.3 19.4 8.4 6.4 52
16.0 08/02/90 0.3 28.6 4.0 6.7 64
16.0 11/06/90 0.3 18.1 7.4 6.9 58
272.0 01/09/90 0.3 8.1 12.0 7.0 58
272.0 02/01/90 0.3 8.6 10.6 6.7 58
272.0 02/14/90 0.3 10.0 11.5 6.7 58
272.0 03/13/90 0.3 13.0 10.6 6.7 54
272.0 04/10/90 0.3 14.3 9.5 6.5 53
272.0 05/10/90 0.3 18.7 7.5 6.2 53
272.0 06/12/90 0.3 24.8 7.3 6.4 53
272.0 07/10/90 0.3 27.3 3.4 6.1 58
272.0 07/30/90 0.3 28.5 5.4 6.4 54 •
272.0 08/14/90 0.3 28.4 6.7 6.3 55
272.0 09/24/90 0.3 22.2 6.7 6.7 60
272.0 10/09/90 0.3 24.1 6.6 6.1 56
272.0 11/14/90 0.3 15.2 8.2 6.7 70
272.0 12/11/90 0.3 12.8 8.8 5.6 56
275.0 02/01/90 0.3 8.5 10.6 6.6 58
275.0 02/01/90 1.0 8.5 10.7 6.6 58
275.0 02/01/90 2.0 8.5 10.7 6.6 58
275.0 02/01/90 3.0 8.5 10.7 6.6 58
275.0 02/01/90 4.0 8.5 10.7 6.7 58
275.0 02/01/90 5.0 8.5 10.6 6.7 58
275.0 02/01/90 6.0 8.5 10.6 6.7 58
III 275.0 02/01/90 7.0 8.4 10.6 6.7 58
275.0 02/01/90 8.0 8.5 10.6 6.7 58
275.0 02/01/90 9.0 8.4 10.6 6.7 58
275.0 02/01/90 10.0 8.4 10.6 6.7 58
275.0 02/01/90 11.0 8.4 10.6 6.7 58
275.0 02/01/90 12.0 8.4 10.6 6.7 58
275.0 02/01/90 13.0 8.4 10.6 6.7 58
275.0 02/01/90 14.0 8.4 10.6 6.7 58
275.0 07/30/90 0.3 29.6 7.2 6.7 54
275.0 07/30/90 1.0 29.5 7.0 6.7 54
275.0 07/30/90 2.0 29.3 7.9 6.7 54
275.0 07/30/90 3.0 29.1 7.4 6.6 53
275.0 07/30/90 4.0 28.9 6.6 6.5 54
275.0 07/30/90 5.0 28.7 5.5 6.4 54
275.0 07/30/90 6.0 28.5 5.3 6.3 55
275.0 07/30/90 8.0 28.4 5.5 6.3 55
275.0 07/30/90 9.0 28.3 5.5 6.3 55
275.0 07/30/90 10.0 28.3 5.5 6.3 54
275.0 07/30/90 11.0 28,2 5.8 6.3 54
275.0 07/30/90 12.0 28.2 5.9 6.3 54
275.0 07/30/90 13.0 28.1 5.9 6.3 54
275.0 07/30/90 14.0 28.1 5.7 6.3 55
275.5 02/01/90 0.3 8.5 10.9 6.7 58
275.5 02/01/90 1.0 8.4 10.8 6.7 58
275.5 02/01/90 2.0 8.4 10.8 6.7 58
275.5 02/01/90 3.0 8.4 10.7 6.7 58
275.5 02/01/90 4.0 8.4 10.7 6.7 59
III
3-4

Table 3-1. Continued.
111/1 Depth TempDO Cond
P
Location Date m ° C mg/L pH pS/cm
275.5 07/30/90 0.3 29.8 7.0 6.8 54
275.5 07/30/90 1.0 29.7 6.9 6.8 54
275.5 07/30/90 2.0 29.5 6.8 6.6 53
275.5 07/30/90 3.0 29.3 6.6 6.5 52
275.5 07/30/90 4.0 29.0 5.5 6.3 53
275.5 07/30/90 5.0 28.8 4.8 6.2 54
277.0 02/01/90 0.3 8.9 10.6 6.7 58
277.0 07/30/90 0.3 29.9 8.2 7.1 53
277.3 02/01/90 0.3 8.9 10.5 6.8 70
277.3 07/30/90 0.3 29.4 8.7 7.6 56
277.5 07/30/90 0.3 30.0 7.5 6.8 53
277.5 07/30/90 1.0 29.4 7.4 6.7 54
277.5 07/30/90 2.0 29.2 7.3 6.7 53
277.5 07/30/90 3.0 29.0 7.2 6.7 54 •
277.5 07/30/90 4.0 28.9 6.9 6.6 54
277.6 07/30/90 0.3 30.5 7.3 6.7. 54
277.6 07/30/90 1.0 29.8 7.2 6.7 53
277.6 07/30/90 2.0 29.4 7.2 6.7 53
277.6 07/30/90 3.0 29.4 7.2 6.7 53
277.6 07/30/90 4.0 29.3 7.2 6.7 53
279.0 02/01/90 0.3 9.1 10.7 6.7 57
279.0 07/30/90 0.3 28.8 6.0 6.5 53
111/1
S3-5

Ill Table 3-2. In-situ water quality parameters at Mt. Island Lake in 1991.
Depth Temp DO Cond
Location Date m ° C mg/L pH pS/cm
16.0 02/04/91 0.3 9.6 10.3 7.0 52
16.0 08/07/91 0.3 27.4 4.7 6.1 55
272.0 02/04/91 0.3 9.9 10.4 6.7 54
272.0 02/13/91 0.3 10.9 10.4 6.4 52
272.0 08/05/91 0.3 27.7 6.1 5.7 58
272.0 08/07/91 0.3 26.7 6.0 6.1 72
275.0 02/04/91 0.3 9.8 10.4 7.0 52
275.0 02/04/91 1.0 9.8 10.5 7.0 52
275.0 02/04/91 2.0 9.7 10.5 7.1 52
275.0 02/04/91 3.0 9.7 10.4 7.1 52
275.0 02/04/91 4.0 9.7 10.4 7.1 52
275.0 02/04/91 5.0 9.7 10.4 7.1 52
275.0 02/04/91 6.0 9.7 10.4 7.0 52
275.0 02/04/91 7.0 9.7 10.5 7.1 52
275.0 02/04/91 8.0 9.7 10.4 7.1 52 ,
275.0 02/04/91 9.0 9.7 10.4 7.0 52
275.0 02/04/91 10.0 9.7 10.4 7.0 52
275.0 02/04/91 11.0 9.7 10.4 7.1 52
275.0 02/04/91 12.0 9.7 10.4 7.0 52
275.0 08/07/91 0.3 29.5 6.9 6.3 54
275.0 08/07/91 1.0 29.6 7.1 6.3 54
275.0 08/07/91 2.0 29.5 6.8 6.3 54
275.0 08/07/91 3.0 29.4 6.7 6.4 54
275.0 08/07/91 4.0 29.4 6.6 6.3 55
275.0 08/07/91 5.0 29.4 6.4 6.3 55
275.0 08/07/91 6.0 29.2 6.2 6.3 55
275.0 08/07/91 7.0 29.0 5.6 6.2 55
111/0
275.0 08/07/91 8.0 28.7 5.3 6.2 55
275.0 08/07/91 9.0 28.5 4.7 6.1 55
275.0 08/07/91 10.0 28.3 4.7 6.1 55
275.0 08/07/91 11.0 28.1 4.5 6.1 55
• 275.0 08/07/91 12.0 28.0 4.3 6.1 55
275.0 08/07/91 13.0 28.0 4.2 6.1 55
275.0 08/07/91 14.0 27.9 4.1 6.0 56
275.0 08/07/91 15.0 27.9 3.9 6.0 56
275.0 08/07/91 16.0 27.9 3.6 6.0 56
275.0 08/07/91 17.0 27.8 3.3 6.0 57
275.5 02/04/91 0.3 9.8 10.6 7.0 52
275.5 02/04/91 1.0 9.7 10.6 7.0 52
275.5 02/04/91 2.0 9..7 10.6 7.0 52
275.5 02/04/91 3.0 9.7 10.5 7.0 52
275.5 02/04/91 4.0 9.6 10.5 7.0 52
275.5 08/07/91 0.3 29.6 6.8 6.2 54
275.5 08/07/91 1.0 29.6 7.1 6.2 54
275.5 08/07/91 2.0 29.6 7.1 6.3 54
275.5 08/07/91 3.0 29.4 6.6 6.3 54
275.5 08/07/91 4.0 29.4 6.5 6.3 54
275.5 08/07/91 5.0 29.3 6.6 6.3 54
275.5 08/07/91 6.0 29.3 6.4 6.3 54
277.0 02/04/91 0.3 9.6 10.7 7.0 52
277.0 08/07/91 0.3 29.7 6.0 6.1 55
277.3 02/04/91 0.3 9.6 10.7 7.0 59
277.3 08/07/91 0.3 29.0 6.3 6.2 66
277.5 02/04/91 0.3 9.6 10.4 7.0 52
277.5 08/07/91 0.3 28.1 5.6 6.2 55
277.6 02/04/91 0.3 9.5 10.4 6.9 52
277.6 08/07/91 0.3 27.9 5.6 6.2 55
279.0 02/04/91 0.3 9.5 10.2 7.0 52
1110
279.0 08/07/91 0.3 28.7 5.0 6.1 55
3-6

11110 Table 3-3. In-situ water quality parameters at Mt. Island Lake in 1992.
Depth Temp DO Cond
Location Date m ° C mg/L pH µS/cm
16.0 02/10/92 0.3 7.8 11.0 7.0 60
16.0 08/06/92 0.3 26.9 5.7 6.3 61
272.0 02/03/92 0.3 8.3 11.3 6.5 60
272.0 02/10/92 0.3 8.3 11.4 6.4 60
272.0 08/03/92 0.3 28.4 4.5 6.4 61
272.0 08/06/92 0.3 28.4 4.0 6.1 62
275.0 02/10/92 0.3 8.1 11.5 6.9 60
275.0 02/10/92 1.0 8.1 11.5 6.9 60
275.0 02/10/92 2.0 8.1 11.5 6.9 60
275.0 02/10/92 3.0 8.1 11.5 6.9 60
275.0 02/10/92 4.0 8.1 11.5 6.9 61
275.0 02/10/92 5.0 8.1 11.5 6.9 61
275.0 02/10/92 6.0 8.1 11.5 6.9 61
275.0 02/10/92 7.0 8.1 11.5 6.9 61 .
275.0 02/10/92 8.0 8.1 11.5 6.9 61
275.0 02/10/92 9.0 8.1 11.5 6.9 61
275.0 02/10/92 10.0 8.1 11.5 6.9 61
275.0 02/10/92 11.0 8.1 11.5 6.9 61
275.0 02/10/92 12.0 8.1 11.5 6.9 61
275.0 02/10/92 13.0 8.1 11.5 6.8 61
275.0 02/10/92 14.0 8.1 11.5 6.9 61
275.0 02/10/92 15.0 8.1 11.4 6.9 61
275.0 08/06/92 0.3 29.5 7.0 6.6 60
275.0 08/06/92 1.0 29.5 7.0 6.7 60
275.0 08/06/92 3.0 29.5 7.0 6.6 60
275.0 08/06/92 4.0 29.5 7.0 6.6 60
111/0
275.0 08/06/92 5.0 29.5 7.0 6.6 60
275.0 08/06/92 6.0 29.5 7.0 6.6 60
275.0 08/06/92 7.0 29.5 7.0 6.6 60
275.0 08/06/92 8.0 29.5 6.9 6.6 60
275.0 08/06/92 9.0 29.2 5.8 6.4 60
275.0 08/06/92 10.0 28.5 3.3 6.1 61
275.0 08/06/92 11.0 28.4 3.0 6.0 62
275.0 08/06/92 12.0 28.3 2.8 6.0 62
275.0 08/06/92 13.0 28.1 2.2 5.9 63
275.0 08/06/92 14.0 27.7 1.2 5.9 68
275.5 02/10/92 0.3 8.0 11.3 7.0 60
275.5 02/10/92 1.0 8.0 11.3 7.0 60
275.5 02/10/92 2.0 8.0 11.3 7.0 60
275.5 02/10/92 3.0 8.0 11.3 6.9 60
275.5 02/10/92 4.0 8.0 11.3 6.9 60
275.5 02/10/92 5.0 8.0 11.2 6.9 60
275.5 08/06/92 0.3 29.4 7.0 6.5 60
275.5 08/06/92 1.0 •29.4 7.1 6.6 60
275.5 08/06/92 2.0 29.5 7.1 6.6 60
275.5 08/06/92 3.0 29.5 7.1 6.6 60
275.5 08/06/92 4.0 29.5 7.1 6.7 60
275.5 08/06/92 5.0 29.4 6.9 6.6 60
277.0 02/10/92 0.3 7.4 11.3 7.0 61
277.0 08/06/92 0.3 28.8 6.3 6.4 60
277.3 02/10/92 0.3 7.4 11.6 7.1 77
277.3 08/06/92 0.3 28.7 7.7 7.0 68
277.5 02/10/92 0.3 7.7 11.1 7.0 60
277.5 08/06/92 0.3 28.4 7.0 6.6 62
277.6 02/10/92 0.3 7.7 11.0 7.0 60
277.6 08/06/92 0.3 27.9 6.9 6.5 62
111/0
279.0 02/10/92 0.3 8.0 10.9 7.0 60
279.0 08/06/92 0.3 27.7 6.0 6.5 61
3-7

STable 3-4. In-situ water quality parameters at Mt. Island Lake in 1993.Depth Temp DO Cond
Location Date m ° C mg/L pH E.S/cm
16.0 02/08/93 0.3 11.5 10.5 6.6 52
16.0 08/09/93 0.3 26.4 4.8 6.1 58
16.0 08/09/93 1.0 26.4 4.8 6.1 58
16.0 08/09/93 2.0 26.4 4.7 6.1 58
16.0 08/09/93 3.0 26.3 4.8 6.1 58
16.0 08/09/93 4.0 25.9 4.9 6.0 59
16.0 08/09/93 5.0 25.7 5.0 6.1 60
272.0 02/01/93 0.3 9.0 10.8 6.2 52
. 272.0 02/08/93 0.3 9.3 10.7 6.2 52
272.0 08/03/93 0.3 29.0 4.2 6.1 58
272.0 08/09/93 0.3 28.5 5.1 5.7 58
275.0 02/08/93 0.3 9.2 11.0 6.6 52
275.0 02/08/93 1.0 9.2 11.0 6.6 52
275.0 02/08/93 2.0 9.2 10.9 6.6 52 •
275.0 02/08/93 3.0 9.2 10.8 6.6 52
275.0 02/08/93 4.0 9.3 10.8 6.6, 52
275.0 02/08/93 5.0 9.2 10.8 6.6 52
275.0 02/08/93 6.0 9.2 10.8 6.6 52
275.0 02/08/93 7.0 9.2 10.8 6.6 52
275.0 02/08/93 8.0 9.2 10.8 6.6 52
275.0 02/08/93 9.0 9.2 10.8 6.6 52
275.0 02/08/93 10.0 9.2 10.8 6.6 52
275.0 02/08/93 11.0 9.2 10.8 6.6 52
275.0 02/08/93 12.0 9.2 10.7 6.6 52
' 275.0 02/08/93 13.0 9.2 10.7 6.6 52
S
275.0 02/08/93 14.0 9.2 10.7 6.6 52
275.0 02/08/93 15.0 9.1 10.7 6.6 52
275.0 05/11/93 0.3 21.6 9.5 6.9 47
275.0 05/11/93 1.0 20.8 9.4 6.9 47
275.0 05/11/93 2.0 20.0 9.2 6.8 47
275.0 05/11/93 3.0 19.3 8.5 6.7 47
275.0 05/11/93 4.0 19.1 8.4 6.6 47 .
275.0 05/11/93 5.0 19.0 8.4 6.6 47
275.0 05/11/93 6.0 18.9 8.4 6.5 47
275.0 05/11/93 7.0 18.9 8.4 6.5 47
275.0 05/11/93 8.0 18.9 8.4 6.5 47
275.0 05/11/93 9.0 18.9 8.4 6.5 47
275.0 05/11/93 10.0 18.8 8.4 6.4 47
275.0 05/11/93 11.0 18.7 8.3 6.4 47
275.0 05/11/93 12.0 18.6 8.3 6.4 47
275.0 05/11/93 13.0 18.6 8.3 6.4 47
275.0 05/11/93 14.0 18.6 8.3 6.4 47
275.0 05/11/93 15.0 18.6 8.3 6.4 47
275.0 05/11/93 16.0 18.6 8.3 6.4 47
275.0 05/11/93 17.0 18.6 8.3 6.4 47
275.0 08/09/93 0.3 28.7 5.1 6.0 57
275.0 08/09/93 1.0 28.7 5.1 6.0 57
275.0 08/09/93 2.0 28.8 5.1 6.0 57
275.0 08/09/93 3.0 28.8 5.0 6.0 57
275.0 08/09/93 4.0 28.8 5.0 6.0 57
275.0 .08/09/93 5.0 28.8 5.0 6.0 57
275.0 08/09/93 6.0 28.8 5.0 6.0 57
275.0 08/09/93 7.0 28.8 5.0 6.0 57
275.0 08/09/93 8.0 28.8 5.0 6.0 57
275.0 08/09/93 9.0 28.8 4.9 6.0 57
275.0 08/09/93 10.0 28.8 5.0 6.0 57
S
275.0 08/09/93 11.0 28.7 4.9 5.9 57
3-8

111/1 Table 3-4. Continued
Depth Temp DO Cond
Location Date m ° C mg/L pH µS/cm
275.0 08/09/93 12.0 28.7 4.9 5.9 57
275.0 08/09/93 13.0 28.7 4.9 5.9 57
275.0 08/09/93 14.0 28.7 5.0 5.9 57
275.0 08/09/93 15.0 28.6 5.0 5.9 58
275.0 11/09/93 0.3 14.7 8.5 6.6 50
275.0 11/09/93 1.0 14.7 8.5 6.7 50
275.0 11/09/93 2.0 14.7 8.5 6.6 50
275.0 11/09/93 3.0 14.7 8.5 6.7 50
275.0 11/09/93 4.0 14.7 8.5 6.7 50
275.0 11/09/93 5.0 14.7 8.5 6.7 50
275.0 11/09/93 6.0 14.7 8.5 6.7 50
275.0 11/09/93 7.0 14.7 8.5 6.7 50
275.0 11/09/93 8.0 14.7 8.5 6.7 50 4,
275.0 11/09/93 9.0 14.7 8.5 6.7 50
275.0 11/09/93 10.0 14.7 8.5 6.7 50
275.0 11/09/93 11.0 14.7 8.5 6.7 50
275.0 11/09/93 12.0 14.7 8.5 6.6 50
275.0 11/09/93 13.0 14.7 8.5 6.7 50
275.0 11/09/93 14.0 14.7 8.5 6.6 50
275.0 11/09/93 15.0 14.7 8.5 6.7 50
275.5 02/08/93 0.3 9.2 10.8 6.6 52
275.5 02/08/93 1.0 9.2 10.8 6.6 52
275.5 02/08/93 2.0 9.2 10.8 6.6 52
275.5 02/08/93 3.0 9.2 10.8 6.6 52
111/0
275.5 02/08/93 4.0 9.2 10.8 6.6 52
275.5 02/08/93 5.0 9.2 10.8 6.6 52
275.5 08/09/93 0.3 28.8 5.1 6.1 57
275.5 08/09/93 1.0 28.8 5.1 6.1 57
275.5 08/09/93 2.0 28.8 5.0 6.1 57
275.5 08/09/93 3.0 28.8 5.1 6.0 57
275.5 08/09/93 4.0 28.8 5.0 6.0 57
275.5 08/09/93 5.0 28.8 5.0 6.0 57
277.0 02/08/93 0.3 8.9 10.9 6.5 52
277.0 08/09/93 0.3 28.3 5.9 6.0 55
277.3 02/08/93 0.3 8.9 10.9 6.6 60
277.3 08/09/93 0.3 27.6 7.3 6.2 59
277.3 08/09/93 1.0 27.5 7.2 6.2 59
277.3 08/09/93 2.0 27.5 7.2 6.2 59
277.3 08/09/93 3.0 27.1 7.3 6.2 62
277.3 08/09/93 4.0 24.3 6.3 6.2 96
277.5 02/08/93 0.3 11.5 10.4 6.6 53
277.5 08/09/93 0.3 27.2 7.4 6.3 57
277.5 08/09/93 1.0 27.2 7.3 6.3 57
277.5 08/09/93 2.0 27.1 7.2 6.3 57
277.5 08/09/93 3.0 26.8 5.7 6.2 59
277.6 02/08/93 0.3 12.1 10.4 6.6 53
277.6 08/09/93 0.3 26.6 6.7 6.2 56
277.6 08/09/93 1.0 26.5 6.5 6.2 56
277.6 08/09/93 2.0 26.3 6.3 6.2 56
279.0 02/08/93 0.3 10.9 10.6 6.6 52
279.0 08/09/93 0.3 26.8 4.1 6.0 59
279.0 08/09/93 1.0 26.6 3.9 6.0 59
279.0 08/09/93 2.0 26.5 3.8 6.0 59
111/0
3-9

11110 S 11110 .
Table 3-5. Water chemistry of Mt. Island Lake during 1990.
Depth NO3 NH3 PO4 TP Si Cl SO4 TS TSS
Location Date m c mg-N/L c mg-N/L c mg-P/L c mg/L mg/L mg/L mg/L c mg/L c mg/L
16.0 02/01/90 0.3 0.269 < 0.050 < 0.005 0.009 1.4 4.7 6.5 54 < 4
16.0 05/09/90 0.3 0.303 < 0.050 < 0.005 0.010 4.1 4.1
16.0 08/02/90 0.3 0.118 < 0.050 < 0.005 0.012 1.5 4.0 5.3 42 < 4
16.0 11/06/90 0.3 0.162 0.075 0.006 0.010 4.4 4.8 .
272.0 01/09/90 0.3 0.279 0.292 0.033 0.060 4.0 7.2
272.0 02/01/90 0.3 0.298 < 0.050 0.007 0.010 2.2 4.8 7.2 46 < 4
272.0 02/14/90 0.3 0.304 < 0.050 < 0.005 0.014 4.2 5.6 7.0 52 4
272.0 03/13/90 0.3 0.323 0.101 < 0.005 0.015 4.1 4.9 . .
272.0 04/10/90 0.3 0.329 < 0.050 0.006 0.014 1.9 4.5 . .
272.0 05/10/90 0.3 0.331 < 0.050 0.006 4.3 4.5 . .
272.0 06/12/90 0.3 0.212 < 0.050 < 0.005 0.012 4.1 4.7 . .
272.0 07/10/90 0.3 0.202 0.083 0.014 0.026 4.3 4.1
272.0 07/30/90 0.3 0.136 0.059 < 0.005 0.017 1.3 4.4 6.5 53 8
272.0 08/14/90 0.3 0.107 0.115 0.008 0.019 1.6 4.6 7.3 47 < 4
272.0 09/24/90 0.3 0.140 0.068 0.006 0.012 1.7 4.4 . .
272.0 10/09/90 0.3 0.090 < 0.050 < 0.005 0.012 4.5 4.4 . .
w 272.0 11/14/90 0.3 0.180 0.052 0.005 0.020 1.3 4.4 . .
272.0 12/11/90 0.3 0.175 < 0.050 0.006 0.012 3.4 4.4
p 275.0 02/01/90 0.3 0.284 < 0.050 < 0.005 0.010 2.5 4.8 7.5 46 < 4
275.0 02/01/90 14.0 0.285 < 0.050 0.010 0.009 2.4 4.8 7.1 48 < 4
275.0 07/30/90 0.3 0.106 < 0.050 0.009 0.016 1.9 4.1 5.3 44 < 4
275.0 07/30/90 14.0 0.100 < 0.050 0.006 0.016 1.4 3.8 6.1 49 4
275.5 02/01/90 0.3 0.281 < 0.050 < 0.005 0.011 2.4 4.7 . .
275.5 02/01/90 4.0 0.277 < 0.050 < 0.005 0.009 2.2 4.7
275.5 07/30/90 0.3 0.113 < 0.050 0.005 0.012 2.8 4.1 . 44 < 4
275.5 07/30/90 5.0 0.109 < 0.050 0.005 0.014 1.0 4.2 . 50 4
277.0 02/01/90 0.3 0.281 < 0.050 0.005 0.011 2.1 4.7 .
277.0 07/30/90 0.3 0.094 < 0.050 0.005 0.013 1.7 4.0 . 46 < 4
277.3 02/01/90 0.3 0.444 < 0.050 0.012 0.042 2.5 4.9 .
277.3 07/30/90 0.3 0.087 < 0.050 < 0.005 0.026 3.3 4.5 51 < 4
277.5 07/30/90 0.3 0.106 < 0.050 < 0.005 0.010 1.2 3.5 5.6 42 < 4
277.5 07/30/90 4.0 0.138 < 0.050 < 0.005 0.014 1.3 4.1 6.2 45 5
277.6 07/30/90 0.3 0.128 < 0.050 < 0.005 0.010 1.2 4.1 5.1 41 < 4
277.6 07/30/90 4.0 0.120 < 0.050 < 0.005 0.010 1.3 4.0 5.7 40 < 4
279.0 02/01/90 0.3 0.295 < 0.050 < 0.005 0.009 2.7 5.4
279.0 07/30/90 0.3 0.134 < 0.050 < 0.005 0.009 1.1 4.3 . 40 < 4

1110 S 11111 .
Table 3-6. Water chemistry of Mt. Island Lake during 1991.
Depth NO3 NH3 PO4 TP Si Cl SO4 TS TSS
Location Date m c mg-N/L c mg-N/L c mg-P/L c mg/L mg/L mg/L mg/L c mg/L c mg/L
16.0 02/04/91 0.3 0.254 < 0.050 < 0.005 0.009 4.0 4.7 6.5 47 < 4
16.0 08/07/91 0.3 0.134 < 0.050 0.018 0.041 4.5 4.2 7.0 51 < 4
272.0 02/04/91 0.3 0.252 < 0.050 0.006 0.017 3.9 4.6 5.0 53 < 4
272.0 02/13/91 0.3 0.281 0.070 0.007 0.010 4.5 5.3 30 4
272.0 08/05/91 0.3 0.161 < 0.050 0.017 0.043 4.6 4.0 5.6 53 < 4
272.0 08/07/91 0.3 0.145 < 0.050 0.023 0.046 4.5 4.1 7.2 40 < 4
275.0 02/04/91 0.3 0.262 0.063 0.012 0.011 3.9 5.0 8.3 53 < 4
275.0 02/04/91 12.0 0.247 < 0.050 < 0.005 0.009 3.8 4.6 5.5 53 < 4
275.0 08/07/91 0.3 0.144 < 0.050 0.019 0.047 4.6 4.2 8.2 55 < 4
275.0 08/07/91 17.0 0.166 < 0.050 0.018 0.046 4.7 3.9 6.7 56 < 4
275.5 02/04/91 0.3 0.259 < 0.050 < 0.005 0.009 4.0 4.5 6.7 .
275.5 02/04/91 4.0 0.246 < 0.050 < 0.005 0.009 3.9 4.6 6.3 .
275.5 08/07/91 0.3 0.190 < 0.050 0.018 0.043 4.5 3.9 8.9 .
275.5 08/07/91 6.0 0.138 < 0.050 0.017 0.055 4.5 3.8 7.2
277.0 02/04/91 0.3 0.247 < 0.050 < 0.005 0.009 3.9 4.6 14.7 55 4
277.0 08/07/91 0.3 0.148 < 0.050 0.018 0.048 4.6 3.9 7.2 55 < 4
277.3 02/04/91 0.3 0.376 < 0.050 0.012 0.024 4.6 4.9 6.5
't 277.3 08/07/91 0.3 0.401 < 0.050 0.021 0.116 5.3 4.6 7.3 .
277.5 02/04/91 0.3 0.276 0.068 0.007 0.009 4.0 4.8 5.6 51 6
277.5 08/07/91 0.3 0.127 < 0.050 0.018 0.028 4.5 3.9 7.3 54 < 4
277.6 02/04/91 0.3 0.249 0.058 0.006 0.008 4.0 4.8 5.9 52 7
277.6 08/07/91 0.3 0.130 < 0.050 0.018 0.043 4.5 3.9 8.0 54 4
279.0 02/04/91 0.3 0.240 < 0.050 < 0.005 0.008 4.1 4.7 8.3 50 < 4
279.0 08/07/91 0.3 0.119 < 0.050 0.018 0.040 4.5 3.8 7.0 48 < 4

11111 S . 11110 ,
Table 3-7. Water chemistry of Mt. Island Lake during 1992.
Depth NO3 NH3 PO4 TP Si Cl SO4 TS TSS
Location Date m c mg-N/L c mg-N/L c mg-P/L c mg/L mg/L mg/L mg/L c mg/L c mg/L
16.0 02/10/92 0.3 0.181 0.051 0.020 0.076 4.7 5.5 5.9 . 56 4
16.0 08/06/92 0.3 0.186 0.067 0.008 0.008 4.0 5.1 5.9 58 < 4
272.0 02/03/92 0.3 0.176 < 0.050 0.019 0.072 4.7 4.9 5.7 45 < 4
272.0 02/10/92 0.3 0.188 < 0.050 0.020 0.077 4.9 5.4 6.1 55 < 4
272.0 08/03/92 0.3 0.147 0.073 < 0.005 0.017 4.1 5.2 5.9 48 < 4
272.0 08/06/92 0.3 0.176 0.067 0.009 0.008 4.2 5.1 5.7 58 < 4
275.0 02/10/92 0.3 0.198 < 0.050 0.020 0.082 4.9 5.5 6.0 57 < 4
275.0 02/10/92 15.0 0.182 < 0.050 0.020 0.078 4.9 5.3 6.7 50 < 4
275.0 08/06/92 0.3 0.159 0.050 0.008 0.011 4.1 5.2 6.1 60 < 4
275.0 08/06/92 14.0 0.145 0.129 0.009 0.011 4.3 5.0 6.4 60 < 4
275.5 02/10/92 0.3 0.194 < 0.050 0.019 0.078 4.9 5.3 6.0
275.5 02/10/92 5.0 0.197 < 0.050 0.019 0.077 4.8 5.8 6.8
275.5 08/06/92 0.3 0.142 < 0.050 0.008 0.012 4.0 5.1 5.3
275.5 08/06/92 5.0 0.137 < 0.050 0.009 0.012 4.0 5.1 5.6
277.0 02/10/92 0.3 0.191 < 0.050 0.019 0.080 4.8 13.8 5.9
277.0 08/06/92 0.3 0.116 < 0.050 0.010 0.013 4.0 5.1 5.4
277.3 02/10/92 0.3 0.643 < 0.050 0.030 0.137 5.9 5.3 7.2
1 277.3 08/06/92 0.3 0.127 0.050 0.012 0.067 4.4 5.6 6.7
N 277.5 02/10/92 0.3 0.173 < 0.050 0.019 0.074 4.9 5.5 6.7 56 < 4
277.5 08/06/92 0.3 0.106 < 0.050 0.011 0.014 4.0 5.4 7.4 46 < 4
277.6 02/10/92 0.3 0.187 < 0.050 0.020 0.082 5.1 5.7 7.4 56 5
277.6 08/06/92 0.3 0.116 < 0.050 0.012 0.013 4.0 5.3 7.1 57 < 4
279.0 02/10/92 0.3 0.179 < 0.050 0.019 0.082 4.8 5.6 7.0
279.0 08/06/92 0.3 0.151 0.059 0.007 0.007 3.9 5.2 5.4 52 < 4

11111 • S .
Table 3-8. Water chemistry of Mt. Island Lake during 1993.
Depth NO3 NH3 PO4 TP Si Cl SO4 TS TSS
Location Date m c mg-N/L c mg-N/L c mg-P/L c mg/L mg/L mg/L mg/L c mg/L c mg/L
16.0 02/08/93 0.3 0.008 0.008 4.1 5.7 53 4
16.0 08/09/93 0.3 0.161 < 0.050 0.005 0.007 4.0 4.0 5.3 44 < 4
272.0 02/01/93 0.3 0.252 < 0.050 0.009 0.011 4.2 3.0 4.4 44 < 4
272.0 02/08/93 0.3 0.024 0.011 4.1 52 4
272.0 08/03/93 0.3 0.146 0.088 0.011 0.019 4.0 4.5 4.3 44 < 4
272.0 08/09/93 0.3 0.123 0.116 < 0.005 0.012 4.2 4.0 5.4 45 4
275.0 02/08/93 0.3 0.013 0.010 4.1 53 < 4
275.0 02/08/93 15.0 0.008 0.010 4.1 6.0 53 5
275.0 05/11/93 0.3 0.273 < 0.050 0.006 4.3 4.0 .
275.0 08/09/93 0.3 0.104 0.097 0.006 0.008 4.2 3.8 5.3 45 4
275.0 08/09/93 15.0 0.105 0.125 0.015 0.008 4.1 4.3 5.4 50 4
275.0 11/09/93 0.3 0.130 < 0.050 0.006 0.006 4.2 4.2 .
275.5 02/08/93 0.3 . 0.007 0.001 4.1 5.4 .
275.5 02/08/93 5.0 0.006 0.008 4.1 5.4 .
275.5 08/09/93 0.3 0.107 0.113 0.008 0.008 4.2 4.1 5.1 • .
275.5 08/09/93 5.0 0.115 0.108 0.007 0.004 4.0 4.0 5.3 .
277.0 02/08/93 0.3 0.006 0.010 4.1 5.9
277.0 08/09/93 0.3 0.101 0.076 0.007 0.010 4.2 3.8 5.4 .
w 277.3 02/08/93 0.3 . 0.012 0.028 4.4 6.1 .
►=- 277.3 08/09/93 0.3 0.170 0.050 0.009 0.031 4.2 4.2 7.3
U4 277.5 02/08/93 0.3 0.009 0.009 4.1 5.7 56 5
277.5 08/09/93 0.3 0.112 < 0.050 0.012 0.016 4.0 4.2 6.1 50 5
277.6 02/08/93 0.3 0.009 0.011 4.0 5.3 56 6
277.6 08/09/93 0.3 0.152 0.050 0.007 0.010 4.0 4.2 5.6 46 < 4
279.0 02/08/93 0.3 0.006 0.010 4.0 . .
279.0 08/09/93 0.3 0.150 0.068 0.008 0.007 4.0 4.0 . .

Tabel 3-9 . Concentrations of cations in Mt. Island Lake from 1990 through 1993 .
• Location=16
Depth Ca Na Mg K Fe Mn Al Hardness
Date m mg / L mg / L mg/ L mg / L c mg/ L c mg / L c mg / L CaCO3 -mg/ L
02/ 01 /90 0 . 3 2 . 6 5 . 0 1 . 2 1 . 7 0 . 1 0 . 02 0 . 3 11 . 4
05/ 09 /90 0 . 3 2 . 7 4 . 2 1 . 2 1 . 6 0 . 1 0 . 02 < 0 . 3 11 . 7
08 / 02/90 0 . 3 . 2 . 6 4 . 2 1 . 2 1 . 7 < 0 . 1 0 . 03 < 0 . 3 11 . 4
11 / 06/90 0 . 3 2 . 6 5 . 0 1 . 2 1 . 9 0 . 3 0 . 07 0 . 4 11 . 4
02/ 04/91 0 . 3 2 . 8 5 . 0 1 . 2 1 . 8 0 . 1 0 . 03 < 0 . 2 11 . 9
08/ 07 /91 0 . 3 2 . 8 4 . 3 1 . 2 1 . 9 0 . 1 0 . 09 < 0 . 2 11 . 9
02/ 10/92 0 . 3 2 . 6 6 . 0 1 . 3 1 . 8 0 . 1 0 . 02 < 0 . 2 11 . 8
08/ 06/92 0 . 3 2 . 5 5 . 6 1 . 2 1 . 6 0 . 1 0 . 03 < 0 . 2 11 . 2
02/ 08 /93 0 . 3 2 . 6 5 . 4 1 . 3 1 . 6 0 . 1 0 . 01 < 0 . 2 11 . 8
08 / 09/93 0 . 3 2 . 7 4 . 0 1 . 2 1 . 5 0 . 1 0 . 05 < 0 . 2 11 . 7
Location=272
02/ 01 /90 0 . 3 2 . 8 5 . 2 1 . 2 1 . 8 0 . 2 0 . 03 0 . 3 11 . 9
02/ 14/90 0 . 3 2 . 9 5 . 3 1 . 3 1 . 8 0 . 1 0 . 03 < 0 . 3 12 . 6
05/ 10/90 0 . 3 2 . 9 4 . 4 1 . 3 1 . 5 0 . 2 0 . 03 < 0 . 3 12 . 6
07 /30/90 0 . 3 2 . 8 4 . 7 1 . 3 1 . 8 0 . 2 0 . 11 0 . 3 12 . 3
08/ 14/90 0 . 3 2 . 5 4 . 9 1 . 2 2 . 0 0 . 1 0 . 06 < 0 . 3 11 . 2
02/ 04/91 0 . 3 2 . 8 5 . 2 1 . 2 1 . 9 0 . 2 0 . 03 < 0 . 2 11 . 9
02/ 13 /91 0 . 3 2 . 7 5 . 0 1 . 2 1 . 8 0 . 1 0 . 02 < 0 . 2 11 . 7
08/ 05/91 0 . 3 2 . 6 4 . 2 1 . 2 1 . 9 < 0 . 1 0 . 06 < 0 . 2 11 . 4
III 08/ 07 /91 0 . 3 2 . 7 4 . 4 1 . 3 2 . 3 < 0 . 1 0 . 06 < 0 . 2 12 . 1
02/ 03/92 0 . 3 2 . 7 8 . 8 . 1 . 3 1 . 8 0 . 1 0 . 02 < 0 . 2 12 . 1
02/ 10/92 0 . 3 2 . 7 5 . 8 1 . 3 1 . 7 0 . 1 0 . 02 < 0 . 2 12 . 1
08/ 03/92 0 . 3 2 . 4 5 . 5 1 . 2 1 . 8 0 . 1 0 . 07 < 0 . 2 10 . 9
08/ 06/92 0 . 3 2 . 5 5 . 8 1 . 2 2 . 0 0 . 1 0 . 07 < 0 . 2 11 . 2
02/ 01 /93 0 . 3 2 . 6 5 . 9 1 . 2 2 . 2 0 . 1 0 . 02 < 0 . 2 11 . 4
02/ 08 /93 0 . 3 2 . 6 5 . 5 1 . 3 1 . 6 0 . 1 0 . 01 < 0 . 2 11 . 8
08/ 03 /93 0 . 3 2 . 6 4 . 4 1 . 3 1 . 8 0 . 1 0 . 09 < 0 . 2 11 . 8
08 / 09 /93 0 . 3 2 . 3 4 . 2 1 . 3 1 . 6 0 . 1 0 . 12 < 0 . 2 11 . 1
Location=275
02/ 01 /90 0 . 3 2 . 7 5 . 2 1 . 2 1 . 7 0 . 1 0 . 03 0 . 3 11 . 7
02/ 01 /90 14 . 0 2 . 8 5 . 2 1 . 2 1 . 7 0 . 1 0 . 02 0 . 3 11 . 9
07 /30 /90 0 . 3 2 . 6 4 . 6 1 . 3 1 . 7 0 . 1 0 . 03 < 0 . 3 11 . 8
07 /30/90 14 . 0 2 . 7 4 . 6 1 . 3 1 . 7 0 . 2 0 . 11 < 0 . 3 12 . 1
02/ 04/91 0 . 3 2 . 7 5 . 1 1 . 2 1 . 9 0 . 1 0 . 02 < 0 . 2 11 . 7
02/ 04/91 12 . 0 2 . 8 5 . 1 1 . 2 1 . 8 0 . 1 0 . 03 < 0 . 2 11 . 9
08/ 07 /91 0 . 3 2 . 6 4 . 2 1 . 3 1 . 9 < 0 . 1 0 . 04 < 0 . 2 11 . 8
08/ 07 /91 17 . 0 2 . 7 4 . 2 1 . 3 1 . 9 0 . 1 0 . 15 < 0 . 2 12 . 1
02/ 10/92 0 . 3 2 . 7 5 . 6 1 . 3 1 . 7 0 . 1 0 . 02 < 0 . 2 12 . 1
02/ 10 /92 15 . 0 2 . 7 5 . 9 1 . 3 1 . 7 0 . 1 0 . 01 < 0 . 2 12 . 1
08/ 06/92 0 . 3 2 . 2 5 . 7 1 . 2 1 . 8 0 . 1 0 . 02 < 0 . 2 10 . 4
08/ 06/92 14 . 0 2 . 6 5 . 7 1 . 3 1 . 9 0 . 1 0 . 50 < 0 . 2 11 . 8
02/ 08/93 0 . 3 2 . 6 5 . 3 1 . 2 1 . 6 0 . 1 < 0 . 01 < 0 . 2 11 . 4
02/ 08 /93 15 . 0 2 . 6 5 . 4 1 . 2 1 . 6 0 . 1 < 0 . 01 < 0 . 2 11 . 4
08/ 09 /93 0 . 3 2 . 2 4 . 0 1 . 2 1 . 5 0 . 1 0 . 11 0 . 2 10 . 4
III" 08/ 09/93 15 . 0 2 . 2 4 . 1 1 . 3 1 . 6 0 . 1 0 . 14 < 0 . 2 10 . 8
3- 14

Table 3-9. Continued.
11111
Location=275.5
Depth Ca Na Mg K Fe Mn Al Hardness
Date m mg/L mg/L mg/L mg/L c mg/L c mg/L c mg/L CaCO3-mg/L
02/01/90 0.3 2.8 5.2 1.2 1.7 0.1 0.02 0.3 11.9
02/01/90 4.0 2.8 5.3 1.3 1.7 0.1 0.02 0.3 12.3
07/30/90 0.3 2.7 4.5 1.3 1.7 0.2 0.11 < 0.3 12.1
07/30/90 5.0 2.5 4.5 1.3 1.7 0.1 0.04 < 0.3 11.6
02/04/91 0.3 2.8 5.1 1.2 1.8 0.1 0.02 < 0.2 11.9
02/04/91 4.0 2.8 5.1 1.2 1.8 0.1 0.02 < 0.2 11.9
08/07/91 0.3 2.6 4.2 1.2 2.0 < 0.1 0.04 < 0.2 11.4
08/07/91 6.0 2.6 4.2 1.2 2.0 < 0.1 0.04 < 0.2 11.4
02/10/92 0.3 2.7 5.8 1.3 1.7 0.1 0.01 < 0.2 12.1
02/10/92 5.0 2.7 5.9 1.3 1.7 0.1 0.01 < 0.2 12.1 •
08/06/92 0.3 2.2 5.6 1.2 1.6 0.1 0.03 < 0.2 10.4
08/06/92 5.0 2.2 5.6 1.2 1.7 0.1 0.02 <. 0.2 10.4
02/08/93 0.3 2.6 5.3 1.3 1.7 0.1 0.01 < 0.2 11.8
02/08/93 5.0 2.6 5.2 1.2 1.7 0.1 0.01 < 0.2 11.4
08/09/93 0.3 2.3 4.1 1.3 1.5 0.1 0.09 < 0.2 11.1
08/09/93 5.0 2.2 4.1 1.2 1.5 0.1 0.09 < 0.2 10.4
Location=277
02/01/90 0.3 2.8 .5.3 1.2 1.7 0.2 0.03 0.3 11.9
• 07/30/90 0.3 2.6 4.6 1.3 1.7 0.1 0.03 < 0.3 11.8
02/04/91 0.3 2.8 5.0 1.2 1.8 0.2 0.03 < 0.2 11.9
08/07/91 0.3 2.7 4.2 1.3 2.0 0.1 0.06 < 0.2 12.1
02/10/92 0.3 2.7 5.9 1.3 1.8 0.1 0.02 < 0.2 12.1
08/06/92 0.3 2.2 5.8 1.3 1.7 0.1 0.07 < 0.2 10.8
02/08/93 0.3 2.6 4.9 1.2 1.7 0.1 0.01 < 0.2 11.4
08/09/93 0.3 1.9 4.1 1.3 1.5 0.2 0.05 < 0.2 10.1
Location=277.3
02/01/90 0.3 3.9 5.4 1.6 1.9 0.3 0.04 0.3 16.3
07/30/90 0.3 2.9 4.6 1.3 1.8 0.1 0.03 < 0.3 12.6
02/04/91 0.3 3.5 5.4 1.5 1.8 0.2 0.03 < 0.2 14.9
08/07/91 0.3 3.8 5.3 1.5 2.5 0.2 0.07 < 0.2 15.7
02/10/92 0.3 4.3 6.9 1.7 1.9 0.2 0.04 < 0.2 17.7
08/06/92 0.3 2.8 6.2 1.4 1.8 0.2 0.06 < 0.2 12.8
02/08/93 0.3 3.2 5.6 1.4 1.7 0.1 0.01 < 0.2 13.8
08/09/93 0.3 2.4 4.3 1.3 1.6 0.2 0.03 < 0.2 11.3
Location=277.5
07/30/90 0.3 2.7 4.4 1.3 . 0.1 0.04 < 0.3 12.1
07/30/90 4.0 2.8 4.3 1.3 0.1 0.04 < 0.3 12.3
02/04/91 0.3 2.8 5.1 1.2 1.8 0.2 0.04 < 0.2 11.9
08/07/91 0.3 2.7 4.1 1.2 1.9 0.2 0.09 < 0.2 11.7
02/10/92 0.3 2.6 5.9 1.2 1.8 0.1 0.02 < 0.2 11.4
08/06/92 0.3 2.4 5.7 1.2 1.7 0.1 0.04 < 0.2 10.9
02/08/93 0.3 2.6 5.4 1.3 1.6 0.1 0.01 < 0.2 11.8
11111 08/09/93 0.3 2.2 4.2 1.3 1.6 0.1 0.02 < 0.2 10.8
3-15

Table 3-9 . Continued.
•
Location=277 . 6
Depth Ca Na Mg K Fe Mn Al Hardness
Date m mg/ L mg/ L mg/ L mg / L c mg/ L c mg/ L c mg/ L CaCO3 -mg/ L
07 /30 /90 0 . 3 2 . 6 4 . 3 1 . 2 . 0 . 1 0 . 03 < 0 . 3 11 . 4
07/30 /90 4 . 0 2 . 7 4 . 3 1 . 3 0 . 1 0 . 03 < 0 . 3 12 . 1
02/ 04/91 0 . 3 2 . 8 5 . 1 1 . 2 1 . 8 0 . 2 0 . 03 < 0 . 2 11 . 9
08 / 07/91 0 . 3 2 . 8 4 . 2 1 . 3 2 . 0 0 . 2 0 . 09 0 . 2 12 . 3
02/ 10/92 0 . 3 2 . 5 5 . 6 1 . 2 1 . 8 0 . 1 0 . 03 < 0 . 2 11 . 2
08 / 06/92 0 . 3 2 . 4 5 . 8 1 . 3 1 . 7 0 . 1 0 . 03 < 0 . 2 11 . 3
02/ 08 /93 0 . 3 2 . 6 5 . 5 1 . 2 1 . 7 < 0 . 1 < 0 . 01 < 0 . 2 11 . 4
08/ 09 /93 0 . 3 2 . 3 4 . 1 1 . 3 1 . 5 0 . 1 0 . 02 < 0 . 2 11 . 1
Location=279 •
02/01/90 0 . 3 2 . 7 5 . 3 1 . 2 1 . 7 0 . 1 0 . 02 0 . 3 11 . 7
07/30/90 0 . 3 2 . 8 4 . 6 1 . 2 1 . 7 0 . 1 0 . 04 0 . 3 11 . 9
02/04/91 0 . 3 2 . 8 5 . 0 1 . 2 1 . 8 < 0 . 1 0 . 02 < 0 . 2 11 . 9
08/ 07/91 0 . 3 2 . 8 4 . 1 1 . 2 1 . 9 < 0 . 1 0 . 10 < 0 . 2 11 . 9
02/ 10/92 0 . 3 2 . 6 5 . 7 1 . 2 1 . 8 0 . 1 0 . 02 < 0 . 2 11 . 4
08 / 06/92 0 . 3 2 . 4 5 . 5 1 . 2 1 . 6 < 0 . 1 0 . 03 < 0 . 2 10 . 9
02/08/93 0 . 3 2 . 6 5 . 5 1 . 3 1 . 7 < 0 . 1 0 . 01 < 0 . 2 11 . 8
08 /09/93 0 . 3 2 . 8 4 . 1 1 . 2 1 . 5 < 0 . 1 0 . 09 < 0 . 2 11 . 9
•
3- 16

Table 3- 10 . Concentrations of trace metals in Mt. Island Lake from 1990 through 1993 .
11110 Location=16
Depth As Cd Cr Cu Hg Pb Ni Se Zn
Date m c ug / L c ug / L c ug /L c ug/ L c ug/ L c ug / L c ug / L c ug/ L c ug/L
02/ 01 /90 0 . 3 . 0 . 1 . 1 . 7 . 4
05 / 09/90 0 . 3 . < 4
08/ 02/90 0 . 3 < 1 . 0 < 0 . 1 1 . 2 < 0 . 1 < 2 . 0 < 4 < 2 . 0 < 4
11 / 06/90 0 . 3 < 4
02/ 04/91 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 4 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
08 / 07 /91 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 4 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
02/ 10/92 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 7 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
08/ 06/92 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 5 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
02/ 08 /93 0 . 3 < 1 . 0 < 1 . 0 1 . 2 < 0 . 1 < 2 . 0 < 3 < 1 . 0 < 10
08 / 09 /93 0 . 3 < 1 . 0 < 0 . 1 < 2 . 0 1 . 7 < 0 . 1 < 2 . 0 < 2 < 1 . 0 < 10
Location=272
02/01 /90 0 . 3 . 0 . 2 . 2 . 3 . 2 . 0 . 15
02/ 14/90 0 . 3 . < 0 . 1 . 2 . 4 . < 2 . 0 . 8
05/ 10 /90 0 . 3 < 0 . 1 1 . 1 . < 2 . 0 < 4
07 /30 /90 0 . 3 < 1 . 0 0 . 2 < 1 . 0 2 . 9 . < 2 . 0 < 3 < 2 . 0 < 16
08/ 14/90 0 . 3 . 0 . 2 2 . 5 . 1 . 1 . . 14
02/04/91 0 . 3 . < 0 . 1 < 1 . 0 . 10
02/ 13/91 0 . 3 . < 0 . 1 . 1 . 5 . < 2 . 0 . . < 10
08 / 05 /91 0 . 3 . 0 . 7 1 . 5 . < 2 . 0 . 10
• 08/ 07 /91 0 . 3 0 . 1 < 1 . 0 6 . 1 . < 2 . 0 < 3 30
02/ 03/92 0 . 3 < 0 . 1 1 . 3 < 2 . 0 . < 10
02/ 10/92 0 . 3 1 . 3 < 0 . 1 . 4 . 5 < 0 . 1 < 2 . 0 < 3 . < 10
08 / 03/92 0 . 3 . 0 . 4 . 7 . 3 . < 2 . 0 . . 18
08/06/92 0 . 3 . 1 . 8 . 17 . 0 . 8 . 1 . . 25
02/ 01 /93 0 . 3 . 0 . 5 4 . 5 . < 2 . 0 . < 10
02/ 08/93 0 . 3 1 . 2 1 . 6 . < 2 . 0 < 3 . < 10
08/ 03/93 0 . 3 . 0 . 2 2 . 9 . < 2 . 0 . . 34
08 / 09/93 0 . 3 . . 2 . 6 . < 2 . 0 . . 23
Location=275
02/ 01 /90 0 . 3 . 0 . 1 . 2 . 5 . 2 . 0 . . 10
02/ 01 /90 14 . 0 0 . 1 1 . 3 2 . 0 4
07 /30/90 0 . 3 < 1 . 0 0 . 2 < 1 . 0 2 . 3 < 0 . 1 < 2 . 0 < 3 < 2 . 0 13
07/30 /90 14 . 0 < 1 . 0 < 0 . 1 < 1 . 0 1 . 8 < 2 . 0 < 3 < 2 . 0 9
02/ 04/91 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 2 . 3 < 0 . 1 < 2 . 0 < 3 < 2 . 0 20
02/ 04/91 12 . 0 < 1 . 0 < 0 . 1 < 1 . 0 1 . 6 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
08/ 07 /91 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 4 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
08/ 07/91 17 . 0 < 1 . 0 0 . 2 < 1 . 0 2 . 5 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
02/ 10/92 0 . 3 1 . 3 < 0 . 1 < 1 . 0 3 . 3 . < 2 . 0 < 3 < 2 . 0 < 10
02/ 10/92 15 . 0 1 . 2 < 0 . 1 < 1 . 0 1 . 3 < 2 . 0 < 3 < 2 . 0 < 10
08/ 06/92 0 . 3 1 . 0 < 0 . 1 < 1 . 0 2 . 7 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
08/ 06/92 14 . 0 1 . 1 < 0 . 1 < 1 . 0 1 . 7 < 2 . 0 < 3 < 2 . 0 < 10
02/ 08/93 0 . 3 < 1 . 0 . < 1 . 0 1 . 3 < 0 . 1 < 2 . 0 < 3 < 1 . 0 < 10
02/ 08/93 15 . 0 < 1 . 0 < 1 . 0 1 . 3 < 0 . 1 < 2 . 0 < 3 < 1 . 0 < 10
08/ 09 /93 0 . 3 < 1 . 0 0 . 2 < 2 . 0 2 . 6 < 0 . 1 < 2 . 0 < 2 1 . 1 11
08 / 09 /93 15 . 0 1 . 0 0 . 2 < 2 . 0 2 . 2 < 0 . 1 < 2 . 0 < 2 1 . 3 < 10
11110
3-17

Tabel 3 . 10 . Continued.
• Location=275 . 5
Depth As Cd Cr Cu Hg Pb Ni Se Zn
Date m c ug/ L c ug/ L c ug / L c ug / L c ug / L c ug / L c ug / L c ug / L c ug / L
02/ 01 /90 0 . 3 . 0 . 1 . 2 . 8 . 2 . 0 . 7
02/ 01 /90 4 . 0 0 . 1 1 . 2 . 2 . 0 4
07 /30/90 0 . 3 < 1 . 0 0 . 4 < 1 . 0 1 . 9 . < 2 . 0 < 3 < 2 . 0 6
07/30/90 5 . 0 < 1 . 0 < 0 . 1 < 1 . 0 1 . 8 < 2 . 0 < 3 < 2 . 0 7
02/ 04/91 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 5 < 0 . 1 < 2 . 0 < 3 < 2 . 0 10
02/ 04/91 4 . 0 < 1 . 0 < 0 . 1 < 1 . 0 1 . 5 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
08/ 07 /91 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 5 . < 2 . 0 < 3 < 2 . 0 < 10
08/ 07/91 6 . 0 < 1 . 0 < 0 . 1 < 1 . 0 1 . 5 . < 2 . 0 < 3 < 2 . 0 < 10
02/ 10/92 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 6 . < 2 . 0 < 3 < 2 . 0 < 10
02/ 10/92 5 . 0 < 1 . 0 0 . 2 < 1 . 0 2 . 0 . < 2 . 0 < 3 < 2 . 0 < 10
08/ 06/92 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 2 . 8 . < 2 . 0 < 3 < 2 . 0 < 10
08 / 06/92 5 . 0 < 1 . 0 < 0 . 1 < 1 . 0 2 . 8 . < 2 . 0 < 3 < 2 . 0 < 10
02/08/93 0 . 3 < 1 . 0 . 1 . 2 1 . 2 . < 2 . 0 < 3 < 1 . 0 < 10
02/ 08/93 5 . 0 < 1 . 0 < 1 . 0 1 . 6 . < 2 . 0 < 3 < 1 . 0 < 10
08/ 09/93 0 . 3 < 1 . 0 < 0 . 1 < 2 . 0 2 . 2 . < 2 . 0 < 2 < 1 . 0 < 10
08/ 09 /93 5 . 0 1 . 1 < 0 . 1 < 2 . 0 1 . 8 . < 2 . 0 < 2 < 1 . 0 < 10
Location=277
02/01 /90 0 . 3 0 . 1 1 . 6 2 . 0 4
7 /300 0 . 3 < 1 . 0 0 . 2 < 1 . 0 1 . 7 < 0 . 1 < 2 . 0 < 3 < 2 . 0 it823 <41 0 . 3 1 . 0 < 0 . 1 < 1 . 0 1 . 3 < 0 . 1 < 2 . 0 < 3 < 2 . 0 <
08/ 07/91 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 7 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
02/ 10/92 0 . 3 1 . 0 < 0 . 1 < 1 . 0 1 . 5 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
08/ 06/92 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 2 . 0 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
02/ 08/93 0 . 3 < 1 . 0 < 1 . 0 1 . 3 < 0 . 1 < 2 . 0 < 3 < 1 . 0 < 10
08/ 09/93 0 . 3 < 1 . 0 0 . 1 < 2 . 0 1 . 9 < 0 . 1 < 2 . 0 < 2 < 1 . 0 < 10
Location=277 . 3
02/ 01 /90 0 . 3 0 . 1 3 . 5 2 . 0 4
07 /30/90 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 3 < 0 . 1 < 2 . 0 < 3 < 2 . 0 5
02/ 04/91 0 . 3 . < 0 . 1 < 1 . 0 < 10
08/ 07/91 0 . 3 < 0 . 1 < 1 . 0 1 . 6 . < 2 . 0 < 2 . 0 < 10
02/ 10/92 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 4 . < 2 . 0 < 3 . < 10
08/ 06/92 0 . 3 . < 0 . 1 < 1 . 0 1 . 8 . < 2 . 0 . < 10
02/08/93 0 . 3 . < 1 . 0 1 . 2 . < 2 . 0 < 3 . < 10
08/ 09/93 0 . 3 . . 1 . 9 . < 2 . 0 . . < 10
Location=277 . 5
07/30 /90 0 . 3 < 1 . 0 < 0 . 1 1 . 2 < 0 . 1 < 2 . 0 < 2 . 0 < 4
07/30/90 4 . 0 < 1 . 0 < 0 . 1 1 . 1 < 2 . 0 < 2 . 0 5
02/ 04/91 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 4 < 0 . 1 < 2 . 0 < 3 < 2 . 0 10
08/ 07 /91 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 1 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
02/ 10/92 0 . 3 < 1 . 0 < 0 . 1 < 1 . 0 1 . 4 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
08 / 06/92 0 . 3 1 . 3 < 0 . 1 < 1 . 0 1 . 7 < 0 . 1 < 2 . 0 < 3 < 2 . 0 < 10
02/ 08/93 0 . 3 < 1 . 0 < 1 . 0 1 . 2 < 0 . 1 < 2 . 0 < 3 < 1 . 0 < 10
ID 08/ 09/93 0 . 3 < 1 . 0 < 0 . 1 < 2 . 0 4 . 8 < 0 . 1 < 2 . 0 < 2 < 1 . 0 < 10
3- 18

11111 Tabel 3-10. Continued.
Location=277.6
Depth As Cd Cr Cu Hg Pb Ni Se Zn
Date m c ug/L c ug/L c ug/L c ug/L c ug/L c ug/L c ug/L c ug/L c ug/L
07/30/90 0.3 < 1.0 < 0.1 1.0 < 0.1 < 2.0 < 2.0 < 4
07/30/90 4.0 < 1.0 < 0.1 1.0 < 2.0 < 2.0 6
02/04/91 0.3 < 1.0 < 0.1 < 1.0 1.5 < 0.1 < 2.0 < 3 < 2.0 10
08/07/91 0.3 < 1.0 < 0.1 < 1.0 1.1 < 0.1 < 2.0 < 3 < 2.0 < 10
02/10/92 0.3 < 1.0 0.3 < 1.0 1.5 < 0.1 < 2.0 < 3 < 2.0 < 10
08/06/92 0.3 1.3 < 0.1 < 1.0 1.6 < 0.1 < 2.0 < 3 < 2.0 < 10
02/08/93 0.3 < 1.0 < 1.0 1.2 < 0.1 < 2.0 < 3 < 1.0 < 10
08/09/93 0.3 < 1.0 < 0.1 < 2.0 1.6 < 0.1 < 2.0 < 2 < 1.0 < 10
Location=279
02/01/90 0.3 0.1 1.3 . 2.0 5
07/30/90 0.3 < 1.0 < 0.1 < 1.0 1.3 . < 2.0 < 3 < 2.0 13
02/04/91 0.3 . < 0.1 < 1.0 < 0.5 < 10
08/07/91 0.3 . < 0.1 < 1.0 1.0 . < 2.0 < 3 < 2.0 < 10
02/10/92 0.3 . < 0.1 < 1.0 2.0 . < 2.0 < 3 . < 10
08/06/92 0.3 . < 0.1 1.6 . < 2.0 . < 10
02/08/93 0.3 . . < 1.0 1.1 . < 2.0 < 3 . < 10
08/09/93 0.3 . . 1.7 . < 2.0 . . < 10
11110
11111
3-19

• Table 3-11. State of North Carolina water quality standards for all freshwaters and
maximum trace element concentrations (pg/L) measured in the water column of
Mt. Island Lake from 1988 through 1993
Maximum
North Carolina SDWA Concentration
Standards Limits measured
Trace Element (µg/L) (µg/L) (µg/L)
Arsenic 50 50 < 1.3
Barium 10001 2000 21, as of 1990
Cadmium 2 5 0.4 •
Chromium, total 50 100 < 2.0
Copper 72 1300 4.8
Lead 25 50 < 2
Mercury 0.012 2 < 0.1
Nickel 100 100 < 3
Selenium 5 50 < 2.0
IIISilver 0.062 14, as of 1990
1 - Water supply (WS) classes - more stringent standard to support additional uses.
2 - Action level as specified in North Carolina Administrative Code 15A NCAC
2B.0211(b)(4)
III
3-20

• Table 3-12. Calculated arsenic and selenium discharges from the Riverbend Steam Station
ash basiin from 1990 through 1993.
DATE FLOW As (µG/L) Se (µG/L) As (G/DAY) Se (G/DAY)
(MGD)
9-Jan-90 2.40 30.0 2.0 270 18
23-Jan-90 1.60 30.0 2.0 180 12
6-Feb-90 1.10 37.0 2.0 153 8
6-Mar-90 1.60 30.0 2.0 180 12
20-Mar-90 1.70 32.0 2.0 204 13
3-Apr-90 1.70 35.0 2.0 223 13
17-Apr-90 1.70 40.0 2.0 255 13
8-May-90 1.30 40.0 2.0 195 10
5-Jun-90 2.40 50.0 2.0 450 18
19-Jun-90 3.20 60.0 2.0 720 24
11-Jul-90 6.10 76.0 2.0 1739 46
24-Jul-90 2.60 61.0 2.0 595 20
7-Aug-90 3.90 84.0 2.0 1229 29
21-Aug-90 4.40 130.0 2.0 2145 33
III3-Sep-90 2.60 103.0 2.0 1004 20
18-Sep-90 3.90 114.0 2.0 1667 29
2-Oct-90 3.20 86.0 2.0 1032 24
16-Oct-90 3.40 53.0 2.0 676 26
6-Nov-90 4.40 40.0 2.0 660 33
20-Nov-90 2.60 40.0 2.0 390 20
4-Dec-90 0.28 22.0 2.0 23 2
11-Dec-90 6.10 15.0 2.0 343 46
8-Jan-91 2.21 19.9 2.0 165 17
16-Jan-91 2.04 22.2 2.0 170 15
5-Feb-91 1.88 43.6 2.3 307 16
20-Feb-91 3.86 38.6 2.0 559 29
5-Mar-91 3.86 38.6 2.1 559 30
19-Mar-91 1.32 41.1 2.0 203 10
2-Apr-91 1.58 26.9 2.0 159 12
16-Apr-91 2.21 37.9 2.0 314 17
7-May-91 1.08 41.3 2.0 167 8
21-May-91 1.08 43.4 2.0 176 8
4-Jun-91 2.97 57.4 2.0 639 22
18-Jun-91 3.86 48.2 10.0 698 145
•
3-21

4
1
. Table 3-12. Continued.
DATE FLOW As (µG/L) Se (µG/L) As (G/DAY) Se (G/DAY)
(MGD)
2-Jul-91 1.58 66.0 2.0 391 12
16-Jul-91 1.58 65.0 2.0 385 12
5-Aug-91 1.19 66.4 2.0 296 9
20-Aug-91 2.21 88.9 2.0 737 17
3-Sep-91 1.58 18.1 10.0 107 59
17-Sep-91 3.40 56.0 714
8-Oct-91 2.58 46.9 10.0 454 97
15-Oct-91 1.88 81.9 577
5-Nov-91 1.58 68.4 2.0 405 12 •
19-Nov-91 3.86 42.5 615
4-Dec-91 4.64 29.2 2.0 508 35
10-Dec-91 4.64 35.9 625
7-Jan-92 1.08 36.3 2.0 147 8
21-Jan-92 3.86 35.4 512
4-Feb-92 1.58 34.6 2.0 205 12
18-Feb-92 1.58 31.4 186
Ill3-Mar-92 1.08 30.8 3.1 125 13
17-Mar-92 1.58 29.8 177
7-Apr-92 1.08 29.4 10.0 119 41
21-Apr-92 2.21 31.4 260
5-May-92 1.88 33.1 10.0 233 71
19-May-92 2.77 25.1 261
2-Jun-92 3.40 34.60 2.0 441 26
17-Jun-92 2.39 29.20 262
7-Jul-92 1.08 34.0 2.0 138 8
21-Jul-92 3.40 46.4 592
4-Aug-92 4.20 62.4 2.0 983 32
18-Aug-92 2.97 52.4 584
8-Sep-92 3.18 113.0 2.0 1348 24
III
3-22

1110
Table 3-12. Continued.
DATE FLOW As (µG/L) Se (µG/L) As (G/DAY) Se (G/DAY)
(MGD)
23-Sep-92 4.20 107.0 1685
6-Oct-92 8.19 100.0 2.9 3071 89
20-Oct-92 5.49 8.1 167
3-Nov-92 2.97 93.0 2.0 1036 22
17-Nov-92 3.40 77.2 984
8-Dec-92 3.40 71.0 2.7 905 34
15-Dec-92 1.88 62.0 437
7-Jan-93 1.58 35.5 1.0 210 6 •
19-Jan-93 2.97 56.0 624
2-Feb-93 3.86 40.4 1.1 585 16
16-Feb-93 1.88 44.0 310
2-Mar-93 2.21 42.6 1.0 353 8
17-Mar-93 5.49 64.0 1318
• 6-Apr-93 1.32 61.6 1.0 305 5
20-Apr-93 1.58 65.2 . 386
4-May-93 1.58 84.8 1.1 502 7
18-May-93 2.21 67.0 555
8-Jun-93 5.49 75.8 1.3 1561 27
22-Jun-93 6.10 76.3 1745
6-Jul-93 2.97 69.0 1.2 768 13
20-Jul-93 6.10 121.0 2768
3-Aug-93 5.49 108.2 1.0 2228 21
17-Aug-93 8.19 68.8 2113
7-Sep-93 2.77 72.6 1.0 754 10
21-Sep-93 3.18 69.9 834
5-Oct-93 2.58 62.2 2.3 602 22
19-Oct-93 1.32 8.2 41
2-Nov-93 1.32 13.0 3.4 64 17
16-Nov-93 1.58 3.7 22
8-Dec-93 1.58 4.9 1.3 29 8
• 15-Dec-93 4.37 9.6 157
3-23

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• CHAPTER 4
BIOLOGICAL EVALUATION
MACROINVERTEBRATES
Methods
Three locations in the vicinity of Riverbend Steam Station were sampled in July or August
of 1991, 1992, and 1993. A ponar grab was used to collect five replicated samples above
the station (Location 16.0), near the mouth of the discharge canal (Location 276.5), and •
near the Mountain Island dam (Location 275.5) (Figure 1-1), Samples were sieved
through a 500 micron mesh wash bucket and preserved with 70% ethanol (containing rose
bengal stain) in the field; organisms were sorted from debris and identified in the
laboratory.
Results and Discussion
•
No pattern of macroinvertebrate densities or diversity at the three locations appeared
related to the discharge of heated effluent from Riverbend Steam Station. The densities of
organisms at the mouth of the discharge canal was higher in 1991 and 1992, and was
similar to the other two locations in 1993 (Table 4-1). The diversity of organisms was also
highest in samples collected from the mouth of the discharge canal in 1992 and 1993, and
was intermediate between the other two locations in 1991. High numbers of oligochaetes
and taxa of the family Chironomidae accounted for much of the density in samples from
the discharge area in 1991 (Table 4-2). The near absence of these same kinds of organisms
accounted for the relatively low mean density of organisms at the upstream location in
1992 (Table 4-3). Even though the density of organisms was somewhat lower in the
discharge canal than at the other two locations in 1993, the benthic community at each
location was similar in terms of taxonomic composition (Table 4-4). These data support
the conclusion that a balanced and indigenous community of benthic macroinvertebrates
exists in Mountain Island Lake in the vicinity of the Riverbend Steam Station discharge.
S
4-1

4110
FISH
Methods
Fish were collected annually in July 1991-1993 and in April 1993 from Mt. Island Lake
using a boat-mounted electrofisher. Collections were made at three locations (16, 275.5,
and 276.5) in July and at Locations 1 through 10 in April (Figure 1-1). Four hundred
meters of shoreline were electrofished at each location in July, whereas 300 meters of
shoreline were electrofished at each location in April. All fish collected were identified,
enumerated, and released. Fish abundance (number of fish/400 m) was tabulated for all
locations. Water temperatures and dissolved oxygen concentrations were measured •
concurrent with sampling at each location in July, but only temperature was measured in
April.
In addition to shoreline fish abundance, pelagic fish abundance in the lower portion of this
reservoir was also sampled hydroacoustically in August 1993. Hydroacoustic sampling
was conducted with 120-kHz dual-beam bow mounted transducer and a scientific grade
• echo sounder with accurate 20- and 40-log-R time varied gain (TVG) along a continuous
transect from the dam to Location 277.5 (Figure 1-1). The system was calibrated using U.
S. Navy standards at the BioSonics Laboratory in Seattle, Washington, and at Mt. Island
Lake prior to sampling, using a tungsten carbide reference sphere as a standard target.
Echo integration processing parameters were set to collect data from 1.5 m below the
surface to 1.0 m above the bottom. Noise thresholds for all systems were set to
differentiate fish greater than 25-30 mm in total length from background noise and small
acoustic scatters in the reservoir. Acoustic data were processed by dual-beam and echo-
integration analysis. Dual-beam analysis was used to determine acoustic size of single fish
targets, and echo integration was used to measure relative fish density. The total reflected
voltage from echo integration was converted to areal densities (number/hectare) by scaling
the voltages by the average backscattered cross section from individual fish targets
combined. The densities were plotted with a geographic index system (GIS) to represent
fish density distribution throughout Mt. Island Lake.
Selenium and zinc concentrations were also measured in muscle tissue of carp, sunfish
(redbreast sunfish and bluegills), and largemouth bass collected in July 1991-1993 at
• Locations 16, 275, 277.5, and 277.6 (Figure 1-1). Muscle tissue was dissected from each
4-2

• fish and selenium and zinc concentrations (ug/g, wet weight) were determined by neutron
activation analysis at the North Carolina State University Nuclear Service Lab in Raleigh.
Annual comparisons of selenium and zinc used mean values for the number of fish of each
taxon collected at each location.
Results and Discussion
Taxonomic Diversity and Abundance
Fish collections from 1991 through 1993 indicated that a balanced indigenous fish
community continues to exist in Mt. Island Lake. Twenty taxa of fish were collected from
Mountain Island Lake (Tables 4-5 and 4-6). Although fish diversity was somewhat lower
in areas adjacent to and downstream than upstream of RSS,. collections from both areas
were comprised of prey and predator taxa commonly found in nearby reservoirs. In July,
16 taxa were collected upstream of Riverbend Steam Station (RSS), while 8 were collected
adjacent to or downstream of the station. In April, 16 taxa were collected upstream and 12
were collected downstream. Of the 20 taxa reported 11 taxa were collected at both the
• upstream and downstream areas. Greenfm shiners, golden shiners, quillback, flat
bullheads, channel catfish, white crappie, black crappie, and yellow perch were collected
only from the upstream areas, while the snail bullhead was collected only from the
downstream areas.
Fish abundance also appeared to be higher upstream of RSS than downstream in 1991-
1993, (Tables 4-5 and 4-6). The fact that this occurred in April 1993, as well as during
July 1991-1993, indicates that other factors along with the release of heated effluent
probably influences fish diversity and abundance upstream and downstream of RSS within
Mt. Island Lake. Comparison of the total number of fish collected and water temperatures
measured near RSS with those upstream and downstream of RSS, indicates that in July
1991 and 1993 elevated water temperatures at the RSS discharge influenced the movement
of fish from the area. In July 1992, when water temperatures were similar adjacent to and
downstream of RSS, fish abundance adjacent to and downstream of RSS were similar and
lower than that noted upstream.
The hydroacoustic estimates of densities of pelagic fish in Mountain Island Lake in July
• 1993 also indicated that other factors along with the release of heated effluent may
4-3

• influence the distribution of fish (Figure 4-1). Some small areas adjacent to and
downstream of RSS had high densities of fish, but generally, the area above RSS had
higher densities of fish than downstream.. The lowest densities of pelagic fish were
downlake in the forebay area of Mt. Island Dam. Siler et al. (1986) reported similar
conditions existed in Lake Norman, the reservoir just upstream of Mt. Island Lake, and
attributed lower fish densities downlake than uplake to decreasing nutrient concentrations
and productivity from the uplake lacustrine area to the downlake limnetic area.
Mt. Island Lake also supports a sport fishery where fishing pressure, harvest, and success
of anglers were reported within the ranges noted for other Catawba River reservoirs
(Cloutman et al. 1988). Inasmuch as the fish community in lower Mt. Island Lake was •
characterized by diversity, the capacity to sustain itself through cyclic changes, the
presence of necessary food chain species, and the lack of domination of pollution tolerant
species, it is concluded that a balanced indigenous fish community exists near the RSS.
Selenium and Zinc Concentrations in Fish
410
Selenium and zinc concentrations in muscle tissue of fish collected from Mt. Island Lake in
1991-1993 ranged from 0.4 to 1.3 ug/g and from 3.0 to 26.1 ug/g, respectively (Figures 4-
2 through 4-7). The highest selenium concentration noted was for carp collected at
Location 277.5, whereas the highest zinc concentration was for sunfish collected at
Location 16.
Mean selenium concentrations varied somewhat by taxon and location in 1991-1993
(Figures 4-2 through 4-4). Carp and sunfish appeared to have slightly higher
concentrations of selenium than largemouth bass. Fish from Location 277.5 (during some
years) had slightly higher concentrations than fish from the other locations. Mean
selenium concentrations in fish at all locations in 1991-1993 were similar to that reported
from the previous collections in 1988-1990 by Harden and Reid (1991). Thus, it does not
appear that RSS has impacted selenium levels in Mt. Island Lake fish.
Mean zinc concentrations in fish were generally similar for all taxa and locations in 1991-
1993 (Figures 4-5 through 4-7). However, an exception was noted for sunfish collected in
1991 at Location 16. The unusually high concentration may have resulted from
• contamination of one of the tissue samples. Only one sunfish of the three analyzed had a
4-4

• high zinc concentration (69.0 ug/g) while the others had concentrations of 3.3 ug/g and 6.1
ug/g. A similar occurrence was noted in data reported by Harden and Reid (1991). They
reported an unusually high mean zinc value for largemouth bass collected in 1990 at
Location 277.5. Only one largemouth bass of the four analyzed in their study had a high
zinc concentration (92.7 ug/g). The values for the remaining fish ranged from 1.4 ug/g to
6.8 ug/g. Mean zinc concentrations for carp did appear to indicate a slight increase in
1993 when compared to data collected previously. However, the increase was at both
upstream and downstream locations and does not appear related to operation of RSS. This
trend will be monitored closely in the future.
Selenium and zinc concentrations in fish collected from Mt. Island Lake remained •
generally low for all taxa and locations in 1991-1993. The one exception may be related to
contamination (from an unknown source) of the tissue sample from one fish. The levels of
selenium and zinc in the tissue of Mt. Island Lake fish do not appear to pose a problem for
fish or for human consumption (Bertholf 1988; Sorensen 1991).
LITERATURE CITED
• Bertholf, R. L. 1988. Zinc. Pages 787-800 in H. G. Seiler, H. Sigel, and A. Sigel,
editors.Handbook on Toxicity of Inorganic Compounds. Marcel Dekker,
Incorporated. New York, NY.
Cloutman, D. G., R. D. Harrell, and L. E. Miller. 1988. 1982-1983 Mountain Island
creel summary. Duke Power Company Research Report PES/88-11. Huntersville,
NC.
Harden, C. W., and S. M. Reid. 1991. Trace elements in Mountain Island Lake water,
sediments, and fish. Duke Power Company Research Report PES/91-05.
Huntersville, NC.
Siler, J. R., W. J. Foris, and M. C. Mclnerny. 1986. Spatial heterogeneity in fish
parameters within a reservoir. Pages 122-136 in G. E. Hall and M. J. Van Den
Avyle, editors. Reservoir Fisheries Management: Strategies for the 80's.
Reservoir Committee, Southern Division American Fisheries Society, Bethesda,
MD.
Sorensen, E. M. 1991. Metal Poisoning in Fish. CRC Press, Incorporated. Boca Raton,
FL.
• 4-5

t
• Table 4-1. Densities (no./m2) and number of taxa present in macroinvertebrate samples
collected from Mountain Island Lake in July or August of 1991, 1992, and 1993.
1991 Number 1992 Number 1993 Number •
Density of Taxa Density of Taxa Density of Taxa
Upstream 2205 23 700 13 6024 27
Discharge 8664 29 4746 27 4245 32
Dam 5467 31 3035 24 5242 30
III
III
4-6

Table 4-2. Densities (No./m2) of benthic macroinvertebrates
1111/ collected from the Catawba River and Mt. Island Lake in
the vicinity of Riverbend Steam Station on July 9, 1991.
TAXON Upstream Discharge Dam
Annelida
Hirudinea 9 17
Oligochaeta 164 2006 258
Polychaeta
Sabellida
Sabellidae
Manayunkia speciosa 43 310 .
Arthropoda
Acari 9 34
Crustacea
Amphipoda
11111
Talitridae
Hyalella azteca 9
Isopoda
Asellidae
Caecidotea spp. 9
Insecta
Diptera
Ceratopogonidae
Alluaudomyia spp. 9
Palpomyia-Bezzia complex 103 250 17
Chaoboridae
Chaoborus spp. 9
Chironomidae (Chironominae)
Demicryptochironomus cuneatus 9
Chironomidae-Chironominae
Axarus spp. 17 .
Chironomus spp. 9 9
Cladotanytarsus spp. 9 431 34
Cryptochironmus spp. 52 52 17
Cryptotendipes spp. 17 121 9
Dicrotendipes modestus 9
1110
Dicrotendipes neomodestus 77
4-7

11111
Table 4-2. Continued.
TAXON Upstream Discharge Dam
Glyptotendipes spp. . 121 17
Lipiniella spp. 9 .
Ni7othauma spp. 17 52 17
Pagastiella ostansa . 34 9
Paralauterborniella nigrohalteral 103 69 .
Polypedilum spp. 86 .
Polypedilum scalaenum 172 .
Polypedilum simulans/digitifer 77 103 .
Pseudochironomus spp. . 276 86 •
Stempellina spp. 17 267 .
Stenochironomus spp. . . 9
Stictochironomus spp. 155 60 .
Tanytarsus spp. 103 956 17
Chironomidae-Orthocladiinae
Parakiefferiella spp. . 17 52
Chironomidae-Tanypodinae
1110 A6labesmyia spp. 69
Ablabesmyia mallochi 9 17 301
Coelotanypus spp. . 60 .
Procladius spp. . 17 69
Ephemeroptera
Baetidae
Baetidae . . 9
Caenidae
Caenis spp. . . 86
Ephemeridae
Hexagenia spp. . 172 .
Megaloptera
Sialidae
Sialis spp. . 17 .
Odonata-Anisoptera
Gomphidae
Stylurus spp. . 9 .
Trichoptera
Leptoceridae
Oecetis spp. . 86 43
Polycentropodidae
1111/
Polycentropus spp. 9 26
4-8

• Table 4-2. Continued.
TAXON Upstream Discharge Dam
Mollusca
Bivalvia
Heterodontida
Corbiculidae
Corbicu7a fluminea 999 2617 3091
Gastropoda
Basommatophora
Physidae
Physella spp. . 17
Pulmonata
Planorbidae
Planorbidae 95
Nematoda 17 508 52
11111
Nemertea
Enopla
Hoplonemertea
Tetrastemmatidae
Prostoma sp. 146
Platyhelminthes
Turbellaria
Tricladida
Planariidae
Dugesia spp. 766
TOTAL NUMBER PER SQUARE METER 2205 8664 5467
1110
4-9

Table 4-3. Densities(No. /m2) of benthic macroinvertebrates
11111 collected from the Catawba River and Mt. Island Lake in the
vicinity of Riverbend Steam Station on August 27, 1992.
TAXON Upstream Discharge Dam
Annelida
Oligochaeta 77 474 499
Polychaeta
Sabellida
Sabellidae
Manayunkia speciosa . 60 .
Arthropoda
Acari . 34 .
Crustacea
Amphipoda
Talitridae
Hyalella azteca . 9 .
11111 Insects
Diptera
Ceratopogonidae
Palpomyia-Bezzia complex 69 26 .
Chaoboridae
Chaoborus spp. . 9 .
Chironomidae-Chironominae
Chironomus spp. . 43 .
Cladotanytarsus spp. 9 69 26
Cryptochironmus spp. 17 .
Cryptotendipes spp. . . 9
Dicrotendipes modestus . 9 9
Dicrotendipes neomodestus . . 155
Pagastiella ostansa . 17 .
Parachironomus spp. . 95 9
Polypedilum spp. 9 .
Polypedilum scalaenum 9 .
Polypedilum simulans/digitifer . 17
Robackia demeijerei 26 .
Stictochironomus spp. 9 .
Tanytarsus spp. 9 146 52
Chironomidae-Orthocladiinae
1110
Parakiefferiella spp. 9 52
4-10

1111/ Table 4-3. Continued.
TAXON Upstream Discharge Dam
Chironomidae-Tanypodinae
Ablabesmyia spp. 103 215
Ablabesmyia annulata 34
Ablabesmyia mallochi 34 215
Coelotanypus spp. 474 103
Labrundinia spp. 34
Procladius spp. 155 52
Ephemeroptera
Caenidae
Caenis spp. 112 • 34
Ephemeridae
Hexagenia spp. 17
Odonata-Anisoptera
Corduliidae
11111 Corduliidae 17
Gomphidae
Stylurus spp. 9
Odonata-Zygoptera
Coenagrionidae
Argia spp. 9
Coenagrionidae 9
Trichoptera
Hydropsychidae
Cheumatopsyche spp. 9 60
Hydroptilidae
Hydroptila spp. 9
Leptoceridae
Oecetis spp. 17 43
Mollusca
Bivalvia
Heterodontida
Corbiculidae
11111
Corbicu7a fluminea 250 362 1137
4-11

•
Table 4-3. Continued.
TAXON Upstream Discharge Dam
Gastropoda
Limnophila
Ancylidae
Ferrissia spp. 17
Pulmonata
Planorbidae
Planorbidae 60
Nematoda 129 9
Nemertea
Enopla
Hoplonemertea
Tetrastemmatidae
Prostoma sp. 26 207
1110 Platyhelminthes
Turbellaria
Tricladida
Planariidae
Dugesia spp. 17 456
TOTAL NUMBER PER SQUARE METER 700 4746 3035
• 4-12

11111 Table 4-4. Densities (No./m2) of benthic macroinvertebrates
collected from the Catawba River and Mt. Island Lake in the
vicinity of Riverbend Steam Station on July 21, 1993.
TAXON Upstream Discharge Dam
Annelida
Hirudinea
Rhynchobdellida
Glossiphoniidae
Helobdella spp. 52
Oligochaeta 1911 835 241
Polychaeta
Sabellida
Sabellidae
Manayunkia speciosa 103 34
Arthropoda
Acari 17 86 43
11110 Crustacea
Isopoda
Asellidae
Caecidotea spp. 17
Insecta
Diptera
Ceratopogonidae
Palpomyia-Bezzia complex 207 34 9
Chaoboridae
Chaoborus spp. 34 9 9
Chironomidae-Chironominae
Chironomus spp. 17
Cladopelma spp. 17
Cladotanytarsus spp. 34 336
Cryptochironmus spp. 250 69
Cryptotendipes spp. 542 69 69
Demicryptochironomus cuneatus 17
Dicrotendipes modestus 43 77
Dicrotendipes neomodestus 1300
11111
Harnischia spp. 34
Lipiniella spp. 26
4-13

1110 Table 4-4. Continued.
TAXON Upstream Discharge Dam
Nilothauma spp. 17
Pagastiella ostansa . 43
Parachironomus spp. . 60 .
Paracladopelma spp. 17 .
Paralauterborniella nigrohalterale 121 .
Polypedilum spp. 34 .
Polypedilum sca7aenum 129 .
Polypedilum simulans/digitifer 517 69 9 .
Pseudochironomus spp. 138 276 77 •
Stempellina spp. 34 .
Stictochironomus spp. 413 .
Tanytarsus spp. 129 284 34
Chironomidae-Orthocladiinae
Nanocladius balticus 26 .
Parakiefferiella spp. 17
Chironomidae-Tanypodinae
Ablabesmyia spp. . 17 77
11111 Ablabesmyia annulata . 17
Ablabesmyia mallochi 60 611
Coelotanypus spp. 534 .
Procladius spp. 77 319 69
Empididae
Drapetis spp. 9 .
Ephemeroptera
Caenidae
Caenis spp. . 43 34
Ephemeridae
Hexagenia spp. 52
Hexagenia limbata 17
Heteroptera
Veliidae
Microvelia spp. 17
Megaloptera
Sialidae
Sialis spp.
IDOdonata-Anisoptera
4-14 26

111, Table 4-4. Continued.
TAXON Upstream Discharge Dam
Corduliidae
Neurocordulia spp. 17
Gomphidae
Gomphidae 9
Stylurus spp. 17
Trichoptera
Hyalopsychidae
Phylocentropus spp. 9
Hydroptilidae
Oxyethira spp. 34 26
Leptoceridae
Oecetis spp. 181 60
Polycentropodidae
Polycentropus spp. 9
11111
Mollusca
Bivalvia
Heterodontida
Corbiculidae
Corbicula fluminea 1119 568 1257
Gastropoda
Basommatophora
Physidae
Physe77a spp. 17
Pulmonata
Planorbidae
Planorbidae 26
Nematoda 43 95 138
Nemertea
Enopla
Hopionemertea
Tetrastemmatidae
1110 Prostoma sp. 26 26 284
4-15

• Table 4-4. Continued.
TAXON Upstream Discharge Dam
Platyhelminthes
Turbel l a r.i a
Tricladida
Planariidae
Dugesia spp. 26 560
TOTAL NUMBER PER SQUARE METER 6024 4245 5242
•
1111/
11111
4-16

• S 0
Table 4-5. Numbers of fish/400 m of shoreline electrofished at three locations in Mt. Island Lake.
Year and location
1991 1992 1993
Scientific name Common name 16.0 276.5 275.5 16.0 276.5 275.5 16.0 276.5 275.5
Dorosoma cepedianum Gizzard shad 2 1
Cyprinella nivea Whitefin shiner 1 1 3 1
Cyprinus carpio Common carp 8 5
Carpoides cyprinus Quillback 7
Moxostoma anisurum Silver redhorse 1
Ameiurus catus White catfish 1 1
Ameiurus platycephalus Flat bullhead 1
Ictalurus punctatus Channel catfish 1
Lepomis auritus Redbreast sunfish 3 3 22 20 4 10 11 1 13
Lepomis gulosus Warmouth 1
Lepomis macrochirus Bluegill 10 4 17 10 4
Lepomis microlophus Redear sunfish 3 11 1 10
Lepomis hybrid Hybrid sunfish 2
Micropertus salmoides Largemouth bass 11 5 8 14 3 14 3
.4.. Pomoxis annularis White crappie 3
iL Pomoxis nigromaculatus Black crappie 1 1
Total number of individuals 35 8 35 79 9 11 57 1 22
Total number of taxa 5 2 4 11 4 2 10 1 5
Surface water temperature (C) 28.5 35.0 30.0 26.0 30.0 30.0 28.5 37.0 32.0
Surface water temperature (F) 83.3 95.0 86.0 78.8 86.0 86.0 83.3 98.6 89.6
Dissolved oxygen (mg/I) 5.3 6.6 7.0 6.6 6.8 7.7 5.8 6.3 6.8

• S S
Table 4-6. Numbers of fish/400 m of shoreline electrofished at transects in Mt. Island Lake upstream and downstream of
Riverbend Steam Station, April 1993. Surface water temperatures were 14.5°C (58.1°F) upstream and 15.0°C
(59.0°F) downstream.
Location and transect
Upstream Downstream
Scientific name Common name 6 7 8 9 10 1 2 3 4 5
Dorosoma cepedianum Gizzard shad 1 1 1 4 1
Cyprinella chloristia Greenfin shiner 9 1 1
Cyprinella nivea Whitefin shiner 45 44 1 9 1 21 8
Cyprinus carpio Common carp 1 12 12 5 7 1 5 1 4
Notemigonus crysoleucas Golden shiner 1 1
Notropis procne Swallowtail shiner 32 1 1 4 3 2 1
Ameiurus brunneus Snail bullhead 1
Ameiurus catus White catfish 4 3
Ictalurus punctatus Channel catfish 1
Lepomis auritus Redbreast sunfish 41 41 40 16 39 11 63 68 39 35
Lepomis gulosus Warmouth 1 1 1 4
Lepomis macrochirus Bluegill 24 3 11 1 19 3 15 3
.4.' Lepomis microlophus Redear sunfish 1 4 3 5 3 1 5 3
c Lepomis hybrid Hybrid sunfish 1 1 1 1 4
Micropterus salmoides Largemouth bass 13 31 27 32 53 17 13 23 23 23
Pomoxis nigromaculatus Black crappie 1
Perca flavescens Yellow perch 1 11 3 1 5
Total number of individuals 169 104 149 64 148 35 108 123 78 62
Total number of species 11 8 13 10 14 7 7 8 7 3

4l)
Riverbend • .
Steam Station
40
•
Fish densities (no/ha)
C
>90,000
80,000- 90,000
70,000- 80,000
Mountain Island 50,000- 70,000
50,000- 60,000
Reservoir 40,000- 50,000
30,000- 40,000
20,000- 30,000
10,000- 20,000
< 10,000
Figure 4-1. Densities of pelagic fish in Mountain Island Lake, August 1993.
4-19

• • •
1. 6 —
1.4 —
1. 2 —
S •
• 16
e 1 —
1 •
*— 277.6
e 0.8 — �- 277.5
i
u0. 6 —
• 275
m
0.4 —
0. 2 —
0 I F F I I
1988 1989 1990 1991 1992 1993
Figure 4-2. Mean concentrations of selenium (ug/g, wet weight) in muscle tissue of carp collected from Mt. Island Lake.

• S •
2
1.8 —
1. 6 —
g 1. 4 —
e • 16
.A 1 1. 2 —
e —A-- 277.E
1 —
n
* 277.5
1 0. 8 — A
U -♦- 275
m0. 6 — ■ •
0. 4 —
0. 2 —
0 I I I I I
1988 1989 1990 1991 1992 1993
Figure 4-3. Mean concentrations of selenium (ug/g, wet weight) in muscle tissue of sunfish collected from Mt. Island Lake.

• • •
1. 4
1. 2 —
1 —
S i ■ 16
IN 1 0. 8 — --A 277.6
e
n �� ■ 277.5
i 0. 6 —
u �� • 275
0.4 —
0.2 —
0 I I I I I
1988 1989 1990 1991 1992 1993
Figure 4.4. Mean concentrations of selenium (ug/g, wet weight) in muscle tissue of largemouth bass collected from Mt.
Island Lake. •

• • •
9 -
8 - /
7 -
6 " ■ 16
- Z 5 —�— 277.6
N
W
n 4
+ 277.5
c • 275
3 -
2 -
1 -
0 I I 4 I I
1988 1989 1990 1991 1992 1993
Figure 4-5. Mean concentrations of zinc (ug/g, wet weight) in muscle tissue of carp collected from Mt. Island Lake.

• • •
30 -
25 -
20 - f 16
277.6
115 -
n • 277.5
-•10 - 275
5 -
0 I I I I I
1988 1989 1990 1991 1992 1993
Figure 4-6. Mean concentrations of zinc (ug/g, wet weight) in muscle tissue of sunfish collected from Mt. Island Lake.

• • •
25 -
20 -
• 16
N 15 }- 277.6
• 277.5
10 - • 275
5 -
•
0 I I 1 I I
1988 1989 1990 1991 1992 1993
Figure 4-7. Mean concentrations of zinc (ug/g, wet weight) in muscle tissue of largemouth bass collected from Mt. Island
Lake.

•~' En.ineer Date Rec. at
1�' REC ///'''.���i�� WASTE 10A.. ..IIOCATION - 10 ® 8s
gi------T9.v rC: 4i E,��a,1.1_.•, ,utit.c j R.V€.t V�G I1f
b ,Y Date a -/ -$
acility Name: . u atu.2.L o.-r�
; EC 18 198 r Ft o.sk ( c JQill
Existing ® . 1 `1
Proposed �:5 Permit No. GO 0 0 Yg C 1 Pipe No. : 0 Oil, County: 0-4-$ / +
P Design Capacity (MGD) : O . 1 p Industrial (% of Flow) : ,0 o Domestic (% of Flow) : 40
H n
Receiving Stream: Qo.3 w(o a R, /t r Class: 4-iL -f's Sub-Basin: 03 -6 8 33
Reference USGS Quad: T. t S S W (P ase attach) Requestor: L..r S a Regional Office Moare.S vi 11e.
M (Guideline limitations, if applicable, are to be listed on the back of this form. )
Design amp.: Drainage Area (mi2) : Avg. Streamflow (cfs) :
7Q10 (cfs) go ( ,h'st_ (. . )Winter 7Q10 (cfs) 30Q2 (cfs) _
Location of D.O. minimum (miles below outfall) : Slope (fpm)
Velocity (fps) : K1 (base e, per day) : K2 (base e. oer day) :
N _ _, ,,..1,, ,L,,„ L-8Y
Effluent Monthly Effluent :'anthly
Characteristics Average Comments Characteristics l.verage Comments
g P* Cs' 6-1 ,
i 5G ( l-t) _ 3 0 /00
H 0.-1 , G-,x,.(Q. 1s 2.0
as,,� yw. ( -- 7
H f
Z . 5
PCrig' ion ®' Comments:
ation O
11621i
rmation
0
C� D
Prepared By: /�4.,,, A Reviewed By: -7,...bfee,( Date: tc'-

For Appropriate Dischargers, List complete Guideline Limitations Below
Effluent Monthly Maximum Daily
vA
Characteristics Average -Aver-age Cbmments
T SS .30,o nt/L iao.0 nil/L
DX ( *4- GrtaSe. Iso Ai/L, zo- o n19/1_
PN .
r
Type of Product Produced Lbs/Day Produced Efflvent Guideline Reference
S /-Q-c...A ,. P01, 124 ca-.a�tJ -"I0311 Mc1c►wa i h I at 3 a
r6f

• E n•ineer Date Rec.
NPDES WASTE l0A ALLOCATION / • to 0 IN RI .
Facility Name: �/u. I D oupei . 1
. — A 4-v.(A I Date o -I _ 7
ESdsting 0 //
on
Proposed Permit Na.: Nc 0 0 o g9 (o ( Pipe a County: Ca-Si
g 0 No. : 00p
Design Capacity (MGD) : 5 - 9g Industrial (% of Flow) : 1 4• g Domestic ( % of Flow) : 0 • o.
Receiving Stream: C.-Doi-Lob a- toViZo1 Class: A- I v Sub-Basin: • 0-o$ - 3 3 •
Reference USGS Quad: F 155 w (Please attach) Requestor: L%SQ eMo,r.( _ Regional Office M Est e
M , .w, I$ioivd L a.CL..
o
(Guideline limitations, if applicable, are to be listed on the back of this form. )
Design 'Imp.: Drainage Area (mi2) : Avg. Streamflow (cfs) :
7Q10 (cfs) 9C) C,-- ‘....i. (Q() Winter 7Q10 (cfs) 30Q2 (cfs)
Location of D.O. minimum (miles below outfall) : Slope (fpm)
Velocity (fps) : Kl (base e, per day): K2 (base e. ter day) :
q i-8y
Effluent Monthly Effluent ► 'antnly
Characteristics Average Comments Characteristics l.verage Comments
Ts' (.�of�� 30 /oo
H '0vt �� c lay , r ,zo
vi
-, . -fa�r.:,r,- ( 1
1.70
POriginal to at or Comments:
Revi l,dCJ n 0
Oanf n O
Pr ed By: iG,...,. .1,
Coat Reviewed By: Date:

liikli-1-14
For Appropriate Dischargers, List t,omplete Guideline Limitations Below
Effluent Monthly Maximum Daily i
Qzaracteristics Average Average Comments
TS S 3o. p,►,ilL loo.0 Ak314. _
a; I + Gir SR- i5.0 /L 2-0, 0At1/4)/G
(r°"
Arsti ;G
Type of Product Produced Lbs/Day Produced Effluent Guideline Reference
5 moo.,,. t (e-C , iar-.,tt,+ AO

77
p, . )! •V,t, ``y.Ar �' s 4` f ! 3T#'`; -':y. "`' 9'_ w�,.'.3 _-
a�e� t2 x. ► z- Reauest NOa• : 2677 l Y z'
pIrr
WASTELOAD ALLOCATION APPROVAL FORM Z�Z4
cilit� Name : DUKE POWER-RIVERBEND
Pe Of Waste : STEAM ELECTRIC
Receiving Stream : CATAWBA RIVER
Stream Class : A-II , B
Suhhasin : 030833
County : GASTON
Regional Office : MOORESVILLE
Reauestor : LISA CREECH
Drainage Area (scs mi ) :
7010 (cfs) : 80
Winter 7010 (cfs) :
3002 (cfs) :
RECOMMENDED EFFLUENT LIMITS -
Wasteflow (mad) : 5 +98 `
pH (SU) : 6-9 . {
TSS (mg/1 ) : 30 100 --
OIL & GREASE (MG/L) : 15 20
ARSENIC (UG/L) : 470
SELENIUM (UG/L) : 47
-- - - COMMENTS
ARSENIC AND SELENIUM LIMITS BASED ON WATER QUALITY STANDARDS ,
MASS BALANCE, AND MIN . INST . RELEASE OF B0 CFS FROM LAKE NORMAN
LIMITS ALSO APPLY TO DRY FLY ASH LANDFILL DISCHARGE (004) .
rHCILITY IS : PROPOSED ( .) EXISTING ( ✓{ NEW `. ) -
LIMITS ARE : REVISION (✓) CONFIRMATION ( ) OF THOSE PREVIOUSLY ISSUED
___ ._ ._ _ _.._._._.__._._._._._.._.._ LATE . _ z/zi
%. REVIEWED BY :
i SUPERVISOR, TECH. SUPPORT _.___DATE .
_.0 e
..
REGIONAL SUPERVISOR ..� .L'_._.__... ._. ... _..DATE :/ 415:—
PERMITS MANAGER : at.._._ .. .. ......_ ._....-.. .. _...._..............._DATE :..1_Z-4/pr_._.
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