NC0004961_Review of DM Requirement of Fossil_19960131

Duke A;& o Con,pui;c
E,;
13339 Hagen Fo i.i Road
Hunleist ille. AV260,-S-7. -9
DUKE POWER
January 31, 1996
Mr. David A. Goodrich
NCDEHNR/Water Quality -
Division of Environmental Management cn
P.O. Box 27687�i
512 N. Salisbury St. U;
Raleigh, North Carolina 27611-7687 —
Subject: Review of Discharge Monitoring Requirements of Fossil
Stations and NPDES Permit Renewal for Four Facilities:
Plant Allen Permit No. NC0004979f - L
N
Belews Creek Steam Station Permit No. NCO024406 —'
Buck Steam Station Permit No. NC0004774
Cliffside Steam Station Permit No. NC0005088
Dan River Steam Station Permit No. NC0003468
Marshall Steam Station Permit No. NC0004987
Riverbend Steam Station Permit No. NC0004961
Training and Technology Center Permit NCO026255
Dear Mr. Goodrich.-
We
oodrich:
We appreciate the opportunity to meet with you and your staff on January 11. 1996, to discuss our request
to modify the monitoring frequency of selected parameters and upcoming NPDES permit renewals. Al"so
thanks for taking time to tour our Lincoln Combustion Turbine and Riverbend Steam Station facilities.
Per our discussion concerning our letter of request (dated November 30, 1996) to change monitoring
requirements for selected parameters at the fossil stations listed above, the $100.00 processing fee for
minor modification of each permit is enclosed. A check of $700.00 for the seven permits is attached.
Also enclosed is a check totaling $1600.00 for the $400.00 processing fee per permit for renewal of the
Plant Allen Permit No. NC0004979, the Dan River Steam Station Permit No. NC6003468, the Riverbend
Steam Station Permit No. NC0004961, and the Training and Technology Center Permit NC0026255. As
we noted in our letter dated December 22, 1995, the permit renewal applications for these four facilities
have been submitted previously. Since these submittals coincided with on-going modification requests and
alignment of permitting with Nvaterbasin plans, the expiration date of the modified permits was changed to
align with their respective Nvaterbasin plan. Because of this overlap of activities, we agreed that these prior
application submittals would suffice for this permit renewal process and that permitting renewal fees would
be paid.

Please contact Ron Lewis, [phone] or me, (704)-875-5954, if you have questions.
Sincerely,
4 a? -
ohn S. Carter, Technical System Manager
Environmental Division
Electric System Support
REL

Annual Pollutant Analysis Monitoring Requirement
Reporting Form A
(Revised June 1990)
L Facility Information: Pagc 1 of 9
NPDES Permit NO: NC 0004961 Discharge (Pipe) No: 002
Facility Name: Riverbend Steam Station Class: I
Person(s) Collecting Samples: Tim Hunsucker / David Davis
Status of facility wastewater treatment operation on day of sampling:
If no, explain briefly: _ Reduced pond volume due to ash removal
Analytical Laboratory: Duke Power Co. / EMS Heritage
IL Sampling:
24 hr composite for main sample / grab for purgeable fraction
Date Sampled: (composite sample) Corresponding sample taken for toxicity testing:
Sampling begun (date, time): 04-25-95 (a 0930
Sampling finished (date, time): 04-26-95 (a 1005
Date and time samples (grab sample): 04-26-95 @ 1005
V .A* -
Year: 1995
County: Gaston
Typical: Yes X No
Yes
X No

A: Purgeable (Volatile Organic) fraction, EPA Method -624—
Number of chemicals detected in Fraction -
0 -Fraction STORET Number 84085
Page 2 of
STORET Compound
Number
Quantitation Quantitation
Limit Target Limit'
Concentration
Detected
GCIMS
Confirmation?
1. Pollutants to be analyzed for:
u u
u
Yes No
34210 Acrolein
100
<100
Yes
34215 Acrylonitrile
100
<100
Yes
34030 Benzene
5
<5
Yes
32101 Bromodichloromethane
5
<5
Yes
32104 Bromoform
5
<5
Yes
34413 Bromomethane
10
<10
Yes
32102 Carbon tetrachloride
5
<5
Yes
34301 Chlorobenzene
6
<6
Yes
34311 Chloroethane
10
<10
Yes
34576 2-Chloroeth1 vinyl ether
10
<10
Yes
32106 Chloroform
5
<5
Yes
34418 Chloromethane
10
<
Yes
32105 Dibromochloromethane
5
<5 5
Yes
34496 11-Dichloroethane
5
<5
Yes
34531 12-Dichloroethane
5
<5
Yes
34501 1 1-Dichloroethlene
5
<5
Yes
34546 trans -1 2-Dichloroeth lene
5
<5
Yes
34541 1 2-Dichloro ro ane
6
<6
Yes
34704 cis 1 3-Dichloro ro ne
5
<5
Yes
34699 trans 1 3-Dichloro ro ene
5
<5
Yes
34371 Ethlbenzene
8
<8
Yes 29
34423 Methylene chloride
5
<5
Yes m
34516 1 12 2-Tetrachlorethane
34475 Tetrachlorethylene
7
5
<7
<5
Yes 0
Yes °D
34010 Toluene
6
<6
111-Ttichloroethane
5
<5
PYes34506
es34511
112 -Trichloroethane
5
<5
es39180
Trichloroethlene
5
<5
es '-
34488 Trichlorofluromethane
10
<10
Yes
39175 Vinyl chloride chloroethene
10
<10
Yes to
* If different from quantitation limit target

2. Other Purgeables (up to 10 highest peaks)
Page 3 of 9
Coumpound
Probable Estimated
Molecular Concentration
Weight u
Libary Match
Probability
%
Retention
Time (RT)
Min
Identification Basis
Check all that apply)
Scan
Number
Libary Manual
Match Interpretation RT
NO T.I.C.S DETECTED
Complete only if non -targeted compounds are present:
Retention
Internal Standard Time
Min
96 1- Onn
S311� IVUiN20 J,8 0o3U

B. Acid Extractable Fraction, EPA Method
_625_
Page 4 of
Number of chemicals detected in Fraction-
0-Fraction STORET Number 45582
STORET Compound
Quantitation Quantitation
Concentration
GC/MS
Number
Limit Target Limit*
Detected
Confirmation?
1. Pollutants to be analyzed for:
u u
u
Yes
No
34452 4-Chloro-3-meth 1 henol
10
<10
Yes
35486 2-Chlorophenol
10
<10
Yes
34601 2 4-Dichloro henol
10
<10
Yes
34606 2,4-Dimethylphenol
10
<10
Yes
34616 2 4-Dinitro henol
50
<50
Yes
34657 2-Meth 1-4 6-dinitro henol
50
<50
Yes
34591 2-Nitrophenol
10
<10
Yes
34646 4-Nitrophenol
50
<50
Yes
39032 Pentachlorophenol
50
<50
Yes
34694 Phenol
10
<10
Yes
34621 1 2,416-Trichlorophenol
10
<10
Yes
* If different from quantitation limit target
ra
n
a
C
m
rn
to
U1
r
r

2. Other acid extractables & base neutrals (up to 10 highest peaks)
Page 5 of 9
Coumpound
Probable
Molecular
Weight
Estimated
Concentration
u
Libary Match
Probability
%
Retention
Time (RT)
Min
Identification Basis
Check all that apply)
Scan
Number
Libary Manual
Match Interpretation
RT
NO T.I.C.S DETECTED
Complete only if non -targeted compounds are present:
Retention
Internal Standard Time
Min
96 1- Onn
S311j 7/ULN30 l,8 0,13U

C. Base/Neutral Fraction, EPA Method _625_
Number of chemicals detected in Fraction_0_
Fraction STORET Number 45583
Page 6 of
STORET
Number
Compound
Quantitation
Limit Target
Quantitation Concentration
Limit* Detected
GC/MS
Confirmation?
1. Pollutants to be analyzed for:
u
u u
Yes No
3405
Acenaphthene
10
<10
Yes
34200
Acenaphthylene
10
<10
Yes
34220
Anthracene
10
<10
Yes
39120
Benzidine
50
<50
Yes
34526
Benzo a anthracene
10
<10
Yes
34247
Benzo a ene
10
<10
Yes
34230
Benzo fluoranthene
10
<10
Yes
34521
Benzo hi lene
10
<10
Yes
34242
Benzo fluoranthene
10
<10
Yes
34278
Bis 2-chloroetho methane
10
<10
Yes
34273
Bis 2-chloroeth 1 ether
10
<10
Yes
34283
Bis 2-chloroiso ro I ether
10
<10
Yes
39100
Bis 2-eth the 1phthalate
10
<10
Yes
34636
4-Bromo hen 1 phenyl ether
10
<10
Yes
34292
Butyl benzyl phthalate
10
<10
Yes
34581
2-Chlorona hthalene
10
<10
Yes
34641
4-Chloro hen l phenyl ether
10
<10
Yes
34320
Ch Bene
10
<10
Yes
34556
Dibenzo (a,h) anthracene
10
<10
Yes
34536
12-Dichlorobenzene
10
<10
Yes
34566
1,3-Dichlorobenzene
10
<10
Yes
34571
14-Dichlorobenzene
10
<10
Yes
34631
3 3-Dichlorobenzidine
20
<20
Yes
34336
Diethyl phthalate
10
<10
Yes
34341
Dimethyl phthalate
10
<10
Yes m
39110
Di-n-butyl phthalate
10
<10
Yes ~
34611
2 4-Dinitrotoluene
10
<10
Yes rn
34626
2 6-Dinitrotoluene
10
<10
Yes
34596
Di-n-octyl phthalate
10
<10
Yes
34346
1 2-Di hen lh drazine
10
<10
Yes T►
34376
Fluoranthene
10
<10
Yes m
34381
Fluorene
10
<10
Yes
39700
Hexachlorobenzene
10
<10
Yes
34391
Hexachlorobutadiene
10
<10
Yes
34386
Hexachlorocyclopentadiene
10
<10
Yes
34396
Hexachloroethane
10
<10
Yes
34403
Indeno 1 2 3-cdpyrene
10
<10
Yes
34408
Iso horone
10
<10
Yes
34696
Naphthalene
10
<10
Yes
34447
Nitrobenzene
10
<10
Yes
34438
N-nitrosodimeth lamine
10
<10
Yes
34428
N-nitroso-di-n-propylamine
10
<10
Yes
34433
N-nitorsodi hen lamine
10
<10
Yes
34461
Phenanthrene
10
<10
Yes
34469
Pyrene
10
<10
Yes
34551
1 2 4-Trichlorobenzene
10
<10
Yes
* If different from quantitation limit target

2. Other base/neutrals (up to 10 highest peaks)
Page 7 of 9
Coumpound
Probable Estimated
Molecular Concentration
Weight u
Libary Match
Probability
%
Retention
Time (RT)
Min
Identification Basis
Check all that apply)
Scan
Number
Libary Manual
Match Interpretation RT
SEE PAGE 5 OF 9
Complete only if non -targeted compounds are present:
Retention
Internal Standard Time
Min
83113 TOILld30 A8 0o3U

D. Organochlorine/Organophosphorus Pesticides and PCB's
Number of chemicals detected in Fraction -
0 -Fraction STORET Number 00188
Page 8 of
STORE Compound
Number
Quantitation
I Limit Target
Quantitation
Limit*
Concentration
Detected
Confirmation?
Dual Column GUMS
1. Pollutants to be analyzed for:
Organochlorine Pesticides/PCB's: EPA Method
(ug/1)
608
(ug/l)
(ug/1)
Yes No Yes No
39330 Aldrin
0.05
39740 2,4,5-T 2
<0.05
Yes
39337 Alpha -BHC
0.05
<0.05
Yes
39338 Beta -BHC
0.05
<0.05
Yes
34259 Delta -BHC
0.1
<0.05
Yes
39340 Gamma-BHC(Lindane)
0.05
<0.05
Yes
39350 Chlordane
0.2
<0.2
Yes
39310 4,4' -DDD
0.1
<0.1
Yes
39320 4,4' -DDE
0.1
<0.1
Yes
39300 4,4' -DDT
0.1
<0.1
Yes
39380 Dieldrin
0.02
0.1
<0.1
Yes
34361 Endosulfan I (alpha)
0.1
<0.1
Yes
34356 Endosulfan II to
0.1
<0.1
Yes
34351 Endosulfan sulfate
0.7
<0.7
Yes
39390 Endrin
0.06
0.1
<0.1
Yes
34366 Endrin aldehyde
0.2
<0.2
Yes
39410 Heptachlor
0.05
<0.05
Yes
39420 Heptachlor epoxide
0.8
<0.8
Yes
39480 Methoxychlor
0.5
<0.5
Yes
39755 Mirex
0.2
<0.2
Yes
39400 Toxaphene
2.4
<2.4
Yes
34671 PCB 1016
0.5
<0.5
Yes
39488 PCB 1221
0.5
<0.5
Yes
39492 PCB 1232
0.5
<0.5
Yes
39496 PCB 1242
0.5
<0.5
Yes
39500 PCB 1248
0.5
<0.5
Yes
39504 PCB 1254
1.0
<1.0
Yes
39508 PCB 1260
1.0
<1.0
Yes
Organophosphorus Pesticides: EPA Method SW846-8141
x-
39560
Demeton
1
2.5
<2.5
Yes
39540
Parathion (ethyl)
0.6
<0.6
Yes
E. Herbicides, EPA Method SW846-8150A
Number of chemicals detected in Fraction -
0 -Fraction STORET Number 00148
STORE Compound Quantitation
Number Limit Target
Quantitation Concentration
Limit* Detected
Confirmation?
Dual Column
1. Pollutants to be analyzed for: u
u u
Yes No
39730 2,4-D 12
<12
Yes
39045 Silvex 2
<2
Yes
39740 2,4,5-T 2
<2
Yes
* If different from quantitation limit target

Organic Anal tical Information:
Pae 9 of
Organic Fraction
Method
Extraction
GC Operating Conditions
Column Description
Surrogates Sikes
Batch
Continuous
Compound
Recovery
%
Length X ID, Fran Thictrrss,
Column Type, Cartier Gas 3 Flow
Rate, Tempenhae Prop—
Purgeable
624
—
—
Rr tex 502.2, 105ra.0.53mm1D, Sum Film
He, lomllmin, 40C 8min, 180C 6hnuL
2mm., 2000, IWrnur, Sam
T0hrene-08
4-Brotno0uorobcnz=w
Dtbrorrwtluorometlxne
107
101
102
Acid Extractable
625
X
25mx0.2nunx0.33um ultra 2 crouhrked
5%Methyl Sdc" Coha He Cartier
0.5rnUmin;45-C(hold 4.0minl45-C
to 300-C (8.0-Chnin} 21 mit.
Nitrobenzene -W
2-F carob phe nyl
Terphenyt-D14
50
48.9
64.7
BaselNeutral Extractable
625
X
25rn4.2rnrnx0 33tan ultra 2 crossly
S%Methyl $drone CohmuL He Carrier
30cra/—;45°C(4mm)8°C/mit mnp
to 300°C hold to 21 minutes
2-t,a«ap>>ara
Phenol -DS
2,4,6-tnbromophenol
34.1
45.1
80.3
Example: Acid Extractable
625
X
30m X 0.25mm, o.25urn. 1)13-5.AB19
He, 30 crr✓sec, 40"C (4 min) -
270'C, IWhnin
d5 - phenol
50
GUMS Libary size number of reference
NBS 45,500
F. Metals and Other Chemicals
Number of Metals and Other Chemicals (as listed below) detected in Sample -
5 -Fraction STORET Number 00188
STORET Compound
Number
Quantitation Quantitation
Limit Target Limit*
Concentration
Detected
1. Pollutants to be analyzed for,
u
u
u
01104 Aluminum
50
483
01097 Antimony
50
<50
01002 Arsenic
10
45
01012 Beryllium
25
<25
01027 Cadmium
2
<2
m
01034 Chromium
5
<5
01042 Copper
2
11
01051 Lead
10
<10
71900 Mercury
0.2
<0.2 Crl
01067 Nickel
10
<10
01147 Selenium
5
<5
m
01077 Silver
5
<5
01092 Zinc
10
<10
2. Other inorganics
01007 Barium
500
<500
00940 Chloride
1000
5700
00720 Cyanide
20
<5
00951 Fluoride
100
120
* If different from quantitation limit target
Analytical,Laboratory eprese tative: 11 nLj F7i—C( hl -C l i n —
Signed: fn Date: Cr
Facility OperatorAn Responsible Charge (ORC): ve t.% 60"z
I certify t It 1 d complete to the best of my knowledge.
Signede�� Date:

-A 4
FACT SHEET FOR WASTELOAD ALLOCATION
t°un
Wasteload Allocation Summary �L �tigu��E -C
(approach taken, correspondence with reg i/�?iT N/�M�✓�pL�
do �2O,er1{�r `mss min
Ash basin discharge with coal pile runoff€ g
wastes, and ash transport water. Recomm c w/
modification of monitoring frequency for /,Sv iS �G� q,�/p j,{,� Ieted and
changed to quarterly monitoring. Monthly (/" Iuarterly
monitoring. cT Srrre-� 70 44&'
Special Schedule Requirements and additi
— „- -
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
RETURN TO TECHNICAL SUPPORT BY:
r
Date:3/27/96
-� Date: 41,
Date: 6
Date: Zb
APR 30 1996
po
C -C)
Request # 8466
Facility Name:
Duke Power Co -
Riverbend Steam Station Outfall W0 DEPT. OF
NPDES No.:
NC0004961
EiNVIR0uv2V1ENT, HC-M,T
s.
Type of Waste:
Industrial - 99.95% - Domestic 0.05% & NATURAL RESOU'z(:F.S
Facility Status:
Existing
Permit Status:
Renewal
APR 4 1996
Receiving Stream:
Catawba River
Stream Classification:
WS -IV & B
Subbasin:
030833
DIVISION OF ENVIRONMENTAL MAT,,'MALINi
County:
Gaston
'
Stream Chara&erig& REo1DlIAL oFFIGE
Regional Office:
Mooresville
USGS #
Requestor:
Clark
Date:
Date of Request:
3/21/96
Drainage Area (mi2): 1800
C'
Topo Quad:
F15SW
4,immer 7010 (cfs): 80
a
00
,n
t°un
Wasteload Allocation Summary �L �tigu��E -C
(approach taken, correspondence with reg i/�?iT N/�M�✓�pL�
do �2O,er1{�r `mss min
Ash basin discharge with coal pile runoff€ g
wastes, and ash transport water. Recomm c w/
modification of monitoring frequency for /,Sv iS �G� q,�/p j,{,� Ieted and
changed to quarterly monitoring. Monthly (/" Iuarterly
monitoring. cT Srrre-� 70 44&'
Special Schedule Requirements and additi
— „- -
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
RETURN TO TECHNICAL SUPPORT BY:
r
Date:3/27/96
-� Date: 41,
Date: 6
Date: Zb
APR 30 1996
po
C -C)

TOXICS/METALS/CONVENTIONAL PARAMETERS
Type of Toxicity Test:
Chronic Ceriodaphnia Qrtrly
WQ or EL
Existing Limit:
10%
Recommended Limit:
10%
BPT (1989)
Monitoring Schedule:
JAN APR JUL OCT
BPT (1989)
Existing Limits
1 1
BAT (1989)
Total Iron (mg/1):
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 (µg/1):
480
Selenium (µg/1):
Monthly monitoring
Total Phosphorus (mg/1):
Monthly monitoring
Total Nitrogen (mg/1):
Monthly monitoring
Recommended Limi
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Newatmenwnf on --��
Other (onsite toxicity stu , 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.
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 (µg/1):
Qrtrly monitoring
Selenium (µg/1):
Qrtrly monitoring
Total Phosphorus (mg/1):
Monthly monitoring
Total Nitrogen (mg/1):
Monthly monitoring
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Newatmenwnf on --��
Other (onsite toxicity stu , 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.

INSTREAM MONITORING REQUIREMENTS
Upstream Location:
Downstream Location:
Parameters:
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
AdNuacy 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?
Special Instructions or Conditions
pug Ie
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.

µ
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 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
_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
IWC _ 10 %
Basin & Sub -basin _CTB33
Receiving Stream _Catawba River
County _ Gaston
QCL PIF Version 9191

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 of l2 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
NPDES should discuss.

Page 1
Note for Jaddje Nowell
From: Paul Clark
Date: 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. q,
3. WLA recommends reducing Arsenic and Selenium monitoring from W ly to la
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
NPDES should discuss.

TOXICANT ANALYSIS
Facility Name
Duke Power-Riverbend •,
NPDES #
NC0004961 i
Qw MGD
6i
7Q 10s (cfs)
801
IWC(%)
Rec'vin Stream
._.._.._.._.._.._.._.._.._.._.._.. 10.41'
Catawba River
Stream Class
WSIII & B
FINAL RESULTS
COPPER
I
Max. Pred Cw
84••u /I
Allowable Cw
67.21 ug/I
Max. Value
40
IRON
Max. Pred Cw
1440': ug/I
Allowable Cw
9602.2; ug/I
Max. Value
720i
ARSENIC SO (= s
Max. Pred Cw
198.24': ug/I
Allowable Cw
480.1 ugA
Max. Value
123.9;
SELENIUM 5
'
Max. Prod Cw
12.42 i ug/I
Allowable Cw
48.0iug/I
Max. Value
4.6
( ff�4`4 IN pmt./ Ed
0,vik
3/26/96 PAGE 1

DUKE POWER-RIVERBEND STEAM STATION JMN
CATAWBA RIVER WS-IV&B 3/26/95
030833
Facility requesting renewal of NPDES permit. Existing 100% industrial permit, no limit on
flow. There are two outfalls -1) 001 -once thru cooling water and 2) 002 - ash basin
discharge, consisting coal pile runoff, domestic ww, stormwater runoff, metal cleaning
wastes, and ash transport water. Domestic waste trated in a 10,.000 GPD septic tank befor
entering the ash pond.No WLA for outfall 001 will be done. This outfall discharges into a
small cove of Mountain Island Lake.
Existing limits for Outfall 002:
1995 APAM data 1994 APAM data
Al 483 µg/1 298 µg/1
As 45 µg/1 103 4g/1
Cu 11 µg/1 9.5 µg/1
Chloride 5700 4g/1 6400 4g/1
Fluoride 120 4g/1 500 µg/1
Toxicity Analysis: Recommend renewal of effluent guidelines of 1 mg/l for
copper and iron. Copper exceeded the WQ allowable, since an action level for the State
and limit can't be given, will recommend renewal of the guideline. Predicted concentration
indicated that iron could exceed the guideline. Recommend that monitoring for
arsenic and selenium be reduced to quarterly. Although neither value exceeded the
allowable concentrations, because of their consistent presence in the effluent, will
recommend that some monitoring continue.
Toxicitiy Test Results: Chronic Qrtrly P/F @ 10%.
Since 1992, Have had only 1 FAIL in Oct. 1992, since that time there have been all PASS,
except for late tests in April 1995, which passed in May 1995..
Staff Report Highlights:
There have been fuel /oil leaks at the Riverbend Steam Station per DMR reports and the
MRO. NOV was issued and there is concern about the lack of timeliness of the oil spill
cleanup. Overall, MRO indicates that Riverbend has a good compliance record.
Recommend renewal of NPDES permit.
Recommend the renewal of all limits with a chance in the arsenic limit to
quarterly monitoring and selenium monitoring from monthly to quarterly.
Mo. Avg. Da. Max.
TSS
23 mg/1 75 mg/1
Oil & Grease
11 mg1l 15 mg/1
Tot. Copper
1 mg/1 1 mg/1
Tot. Iron
1 mg/1 1 mg/1
Tot. As
480 µg/1
Tot. Se
monthly monitor
TN & TP
monthly monitor
pH
6-9 SU
Chronic Toxicity @
10% --JAN APR JUL OCT
1995 APAM data 1994 APAM data
Al 483 µg/1 298 µg/1
As 45 µg/1 103 4g/1
Cu 11 µg/1 9.5 µg/1
Chloride 5700 4g/1 6400 4g/1
Fluoride 120 4g/1 500 µg/1
Toxicity Analysis: Recommend renewal of effluent guidelines of 1 mg/l for
copper and iron. Copper exceeded the WQ allowable, since an action level for the State
and limit can't be given, will recommend renewal of the guideline. Predicted concentration
indicated that iron could exceed the guideline. Recommend that monitoring for
arsenic and selenium be reduced to quarterly. Although neither value exceeded the
allowable concentrations, because of their consistent presence in the effluent, will
recommend that some monitoring continue.
Toxicitiy Test Results: Chronic Qrtrly P/F @ 10%.
Since 1992, Have had only 1 FAIL in Oct. 1992, since that time there have been all PASS,
except for late tests in April 1995, which passed in May 1995..
Staff Report Highlights:
There have been fuel /oil leaks at the Riverbend Steam Station per DMR reports and the
MRO. NOV was issued and there is concern about the lack of timeliness of the oil spill
cleanup. Overall, MRO indicates that Riverbend has a good compliance record.
Recommend renewal of NPDES permit.
Recommend the renewal of all limits with a chance in the arsenic limit to
quarterly monitoring and selenium monitoring from monthly to quarterly.

.._.._..----.._.._.._.._..—i
Facility Name ;Duke Power-Riverbend i
NPDES 8NC0004961
ow (MGD) 6i
7010s (cts) 80i
IWC (%) 10.41 i
Pec'ving Stream lCatawba River i
Stream Class WSIII & B !
PPER
Max. Pred Cw
Allowable Cw
Max. Value
Max. Pred Cw
Allowable Cw
Max. Value
SEN IC
Max. Pred Cw
Allowable Cw
Max. Value
LENIUM
Max. Pred Cw
Allowable Cw
Max. Value
Max. Pred Cw
Allowable Cw
Max. Value
Max. Pred Cw
Allowable Cw
Max. Value
0
Max. Pred Cw
Allowable Cw
Max. Value
0
Max. Pred Cw
Allowable Cw
Max. Value
0
Max. Pred Cw
Allowable Cw
Max. Value
0
Max. Pred Cw
Allowable Cw
Max. Value
0
Max. Pred Cw
Allowable Cw
Max. Value
3/26/96
FINAL RESULTS
i
84!ugA
67.2ugA
401
i
1440: ugA
9602.2iugA
7201
i
198.24!ugA
480.1'.ugA
123.9
i
12.42i iu9A
48.O:ugA
4.6
i
OiugA
#VALUE! iugA
0!ugA
#VALUE! iugA
0!
i
OiugA
0.0!ugA
0i
i
0!ugA
0.0iugA
0!.
i
i
.iugA
0.0iugA
0;
Parameter= iCOP PER
Standard= ! — —� — —7j ggA
n
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
BDL=1/2DL Aci
2.5 <5
9
2.5 <5
10
2.5 <5
10
10
10
10
10
10
10
10
40
9
10 <2
10 <2
40
20
30
30
30
30
10 <2
20
6
8
7
2.5 <5
9
2.5 <5
2.5 <5
2.5 <5
2.5 <5
33
5
6
5
7
13
2.5 <5
18
13
8
2.5 <5
12
2.5 <5
2.5 <5

,garu4 quMIX
SOC PRIORITY PROJECT: Yes—No X
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: Paul Clark
Date: March 15, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County: Gaston
Permit No. NC 0004961
PART I - GENERAL INFORMATION
1. Facility and Address: Riverbend Steam Station
2. Date of Investigation: March 14, 1996
3. Report Prepared By: Todd St. John
4. Persons Contacted and Telephone Number: Steve Rutledge [phone]
5. Directions to Site: From the intersection of Mount Holly-Huntersville Road and Highway
16, travel north on Highway 16 approximately 2 miles. After crossing over Mountain Island
Lake turn right at stop light and follow signs to entrance.
6. Discharge Point(s). List for all discharge points:
outfall 001 outfall 002
Latitude: 350 21' 28" 350 22' 06"
Longitude: 800 58' 12" 800 57' 31"
Attach a U.S.G.S. map extract and indicate treatment facility site and discharge point on
map.
U.S.G.S. Quad No.: F15SW U.S.G.S. Name: Mountain Island Lake, NC
7. Site size and expansion are consistent with application? N/A
8. Topography (relationship to flood plain included): The entire site is located on a bend in the
Catawba River among gently rolling hills. None of the facilities are located in a flood plain.

9. Location of nearest dwelling: Greater than 500 feet.
10. Receiving stream or affected surface waters: Catawba River
a. Classification: WS -IV and B
b. River Basin and Subbasin No.: 030833
C. Describe receiving stream features and pertinent downstream uses: Area is used for
primary and secondary recreation. There is a water supply intake downstream.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: N/A MGD (Ultimate Design Capacity)
b. What is the current permitted capacity of the wastewater treatment facility? N/A
C. Actual treatment capacity of the current facility (current design capacity)? N/A
d. Date(s) and construction activities allowed by previous Authorizations to Construct
issued in the previous two years: Duke Power has constructed an oil/water separator
to remove #2 fuel oil from groundwater contaminated by an oil pipe leak. This
facility is currently in operation. The A to C was granted May 26, 1995.
e. Please provide a description of existing or substantially constructed wastewater
treatment facilities: The facilities consist of once through non -contact cooling water
that discharges at outfall 001, a septic system for domestic waste, 4 yard drains, coal
pile runoff, metal cleaning wastes, and ash transport water that discharge to two ash
basins in series which in turn discharge to the Catawba River at outfall 002., storm
water systems that include 4 storm water oil trap tanks, and a groundwater
remediation system that discharge into the intake lagoon for the once -through non -
contact cooling water.
f. Please provide a description of proposed wastewater treatment facilities: N/A
g. Possible toxic impacts to surface waters: There have been instances of fuel/oil leaks.
h. Pretreatment Program (POTWs only): N/A
2. Residuals handling and utilization/disposal scheme:
Page 2

a. If residuals are being land applied, please specify DEM permit no.: N/A
b. Residuals stabilization: N/A
C. Landfill: N/A
d. Other disposal/utilization scheme (specify): Duke Power Riverbend Steam Station
has obtained Permit No. WQ0000452 to reuse ash from the ash basin as described
in the subject permit. Domestic residuals are disposed of by a septage hauler, and
residuals that accumulate in the storm water collection system (oil trap tanks) are
disposed of by vendors equipped to collect and dispose of these materials.
Treatment plant classification (attach completed rating sheet): Class I
4. SIC Code(s): 4911
Wastewater Code(s) of actual wastewater, not particular facilities, i.e., non -contact cooling
water discharge from a metal plating company would be 14, not 56.
Primary: 14 Secondary: 68, 16, 69
Main Treatment Unit Code: 50007
PART III - OTHER PERTINENT INFORMATION
Is this facility being constructed with Construction Grant Funds or are any public monies
involved (municipals only)? N/A
2. Special monitoring or limitations (including toxicity) requests: N/A
Important SOC, JOC or Compliance Schedule dates: (please indicate) N/A
4. Alternative Analysis Evaluation: N/A
5. Other Special Items: N/A
PART IV - EVALUATION AND RECOMMENDATIONS
Duke Power Riverbend Steam Station has applied for renewal of its NPDES permit. This
permit includes provisions for domestic wastewater, storm water, and various industrial discharges.
Riverbend had recently received a NOV for an oil spill which reached the Catawba River.
One of the concerns of this Office expressed in the NOV was the lack of timely attempts to clean up
Page 3

the oil spill. Riverbend is currently attempting to map all of the processes that involve oil to prevent,
control, and clean oil spills. This effort is part of The Environmental Leadership Program that -Duke
Power, NC DEHNR, and EPA are developing.
Overall, Duke Power Riverbend has a good compliance record. Therefore, this Office
recommends renewing the NPDES permit.
Signature of Report Preparer
Water Quali Regional Supervisor
i
Date '
Page 4