NC0004979_Regional Office Historical File Pre 2018

PAT MCCRORY
Governor
r ja
DONALD R. VAN DER VAART
Secretary
Water Resources S. JAY ZIMMERMAN
ENVIRONMENTAL QUALITY
Director
November 25,2015
Mr. Brent Dueitt,General Manager II
Regional Stations
Duke Energy Carolinas,LLC
253 Plant Allen Road
Belmont,North Carolina 28012
Subject: Toxicity Test Results
Duke Energy Carolinas Allen Steam Station
NPDES Permit No.NC004979
Gaston County
Dear Mr. Dueitt:
Enclosed is a copy of the toxicity test results relative to the samples collected at the subject
facility on October 6 and 8,2015 by Mr.Wes Bell of this Office. Whole effluent samples were collected
for use in a chronic Ceriodaphnia dubia pass/fail toxicity test. The test passed utilizing these samples.
The report should be self-explanatory;however, should you have any questions concerning this
report,please do not hesitate to contact Ms.Carol Hollenkamp at(919)743-8450 and/or Mr.Wes Bell at
[phone], or at [e-mail] and [e-mail].
Sincerely,
rL. Michael L.Parker,Regional Supervisor
Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources,DEQ
Enclosure:
Toxicity Test Results
cc: MSC 1617-Central Files/Basement
Susan Meadows,Aquatic Toxicity Unit
Gaston County Health Department
WB
State of North Carolina I Environmental Quality I Water Resources I Water Quality Regional Operations

Division of Water Resources
November 19,2015
MEMORAISIXIM
To: Michael Parker
Water Quality Regional Operations,MRO
Through: Cindy A.Moore
Supervisor,Aquatic Toxicology Branch(ATB)
From: Carol Hollenkamp CM
Quality Assurance Officer,Aquatic Toxicology Branch(ATB)
Subject: -Whole effluent toxicity test results
Duke Energy Allen Steam Station
NPDES Permit#NC0004979/002
Gaston County
The-aquatic toxicity test using grab samples of effluent discharged from the Duke Energy Allen Steam
Station has been completed. Duke Energy Allen Steam Station has a permitted effluent discharge
entering the Catawba River(7Q10 of 95 CFS). Whole effluent samples were collected on October 6 and
October 8 by Wes Bell and facility representative Michael Gantt for use in a chronic Ceriodaphnia dubia
pass-fail toxicity test. This test passed. Toxicity test information.follows.
Test Type 3-Brood Ceriodaphnia dubia chronic pass fail
Teat Concentrations 20%
Test Remit Pass
Control Survival 92%
Control Mean Reproduction 23.25 neonates
Test Treatment Survival 92%
Treatment Me=Reproduction 23.0 nooMeal
First Sample pH .7.21 SU
First Sample Conductivity 306 miczoinhosictn
First Sample Total Residual Chlorine <0.10 mg11.,
Second Sample pH 7.23 SU
Second Sample Conductivity 309 micromhos/cm
Second Sample Total Residual Chlorine <0.10 mgiL
Test results for the above samples indicate that the effluent would not be predicted to have water quality
impacts.These samples were split with Environmental Testing Solutions,Inc. The test conducted by
Environmental Testing Solutions,Inc.,also passed. Please contact us if you have any questions or if
further effluent toxicity monitoring is.desired. We may be reached at(919)743-8401.
Basin: CTB34
cc: Central Files
Wes Bell(IvIRO)
•
Aquatic Toxicology Branch Water Sciences Section

fr,k/
• AA,
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality Dee Freeman
Beverly Eaves Perdue Coleen H. Sullins Secretary
Governor Director
May 18, 2009
Mr. Don Scruggs
Duke Power Allen Steam Station
243 Plant Allen Road
Belmont,North Carolina 28012
Subject: Toxicity Test Results
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County,NC
•
Dear Mr. Scruggs:
Enclosed is a copy of the toxicity test results relative to the inspection conducted at the subject facility
on May•5 and 8, 2009by John Lesley of this Office. Effluent samples of outfall 002 were collected on May 5
and 8, 2009 for use in a chronic Ceriodaphnia dubia pass/fail toxicity test. The test utilizing these samples
resulted in a pass.
The report should be self-explanatory; however, should you have any questions concerning this report,
please do not hesitate to contact Mr. Lesley or me at [phone].
Sincerely,
•
(TT:
obert B. Krebs
Regional Supervisor
Surface Water Protection
Enclosure
cc: Susan Meadows, Aquatic Toxicology Unit
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115 One
Phone:[phone]\Fax:[phone]\Customer Service: 1-877-623-6748 NorthCarolina
Internet:www.ncwaterquality.org tl(1 lhn
m An Equal Opportunity Affirmative Action Employer-50%Recycledl10°%Post Consumer paper a """, ""�/

RECF h
Division of Water Quality SAY , $ 2009
May 14,2009 ,
;..,r iJLiNiK uvi?'
DWQ-Surface Water Ploi lion
MEMORANDUM
To: Rob Krebs
Regional Supervisor,Surface Water Protection,MRO '',
y
Through: Cindy A.Moore C\
Supervisor,Aquatic Toxicology Unit
r/
From: Carol Hollenkamp('(
Quality Assurance Officer,Aquatic Toxicology Unit ,.,qu
.'y�
Subject: Whole effluent toxicity test results !.'i
Duke Power-Allen 002 `'
NPDES Permit#NC0004979/002 "` rk
Gaston County
The aquatic toxicity test using grab samples of effluent discharged from Duke Power-Allen 002 has been
completed. Duke Power-Allen 002has an effluent discharge permitted that is not limited entering the
Catawba River(7Q10 of 95.0 CFS). Whole effluent samples were collected as grab samples on May 5 and
May 8 by John Lesley for use in a chronic Ceriodaphnia dubia pass/fail toxicity test. The test using these ,'
samples resulted in a pass. Toxicity test information follows.
Test Type 3-Brood Ceriodaphnia d• ubia pass/fail
C.c Test Concentrations 24.0%sample
., , Test Result Pass
i' Control Survival 100%
4 '�$ Control Mean Reproduction 19.9 neonates
Test Treatment Survival 100%
07 Treatment Mean Reproduction 20.5 neonates
First Sample pH 6.32 SU
First Sample Conductivity 241 micromhos/cm
First Sample Total Residual Chlorine <0.0052 mg/L
Second Sample pH 6.70 SU
o Second Sample Conductivity 332 micromhos/cm
'_,," Second Sample Total Residual Chlorine <0.0052 mg/L
Test results for the above samples indicate that the effluent would not be predicted to have water quality
impacts on receiving water. Please contact us if further effluent toxicity monitoring is desired. We may be
reached at(919)743-8401.
Basin: CTB 34
cc: Central Files
John Lesley, MRO
Aquatic Toxicology Unit Environmental Sciences Section

W A
0
�0 qOG Michael F.Easley, vc,,,
William G.Ross Jr.,Secre:.,.
North Carolina Department of Environment and Natural Reso
O `C Alan W.Klimek,P.E.
Division of Water Qua`::
July 27, 2006
Mr. Don Scruggs
Duke Power Company-Allen Steam Station
253 Plant Allen Road
Belmont,NC 28012
Subject: Toxicity Test Results
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County,NC
Dear Mr. Scurggs:
Enclosed is a copy of the toxicity test results relative to the inspection conducted at the
subject facility on July 14, 2006 by John Lesley of this Office. Effluent Samples (outfall 002)
were collected on July 11 and 14, 2006 by Division staff for use in a chronic Ceriodaphnia dubia
pass/fail toxicity test. The test utilizing these samples resulted in a pass.
The report should be self-explanatory; however, should you have any questions concerning
this report,please do not hesitate to contact Mr. Lesley or me at(704) 663-1699.
Sincerely,
Ce—or
D. Rex Gleason, P.E.
lSurface Water Protection Regional Supervisor
Enclosure
cc: Central Files
Kevin Bowden,Aquatic Toxicology Unit
Gaston County Health Department
No
®WAA e
Ati* hCarolirc
NCDENR Naturaif
Mooresville Regional Office Division of Water Quality Phone [phone] Customer Ser la
Internet: www.ncwaterqualitv.org 610 East Center Ave,Suite 301 Mooresville,NC 28115 Fax [phone]
An Equal Opportunity/Affirmative Action Employer-50%Recycled/10%Post Consumer Paper

Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Page 2
Whole effluent samples of outfall 002 were collected on July 11 and 14, 2006 by John
Lesley for use in a chronic Ceriodaphnia dubia pass/fail toxicity test. Duke Power Allen Steam
Station- 002 has an effluent discharge permitted at 11.6 MGD entering the Catawba River(7Q10
of 95.0 CFS). The test using these samples resulted in a pass. Toxicity test information follows:
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentration 16% sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 24.8 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 27.1 neonates
First Sample pH 6.00 SU
First Sample Conductivity 193 micromhos/cm
First Sample Total Residual Chlorine <0.0052 mg/1
Second Sample pH 6.49 SU
Second Sample Conductivity 185 micromhos/cm
Second Sample Total Residual Chlorine <0.0052 mg/1
Test results for these samples indicate that the effluent would not be predicted to have
water quality impacts on the receiving stream.

W A 7-E Michael F.Easley.Governor
-= 9 William G.Ross Jr.,Secretary_,/' �n
c3 Y ` QG North Carolina Department of Environment and Natural Resources 1-
Vj ' Coleen Sullins.Director
'— Division of Water Quality
0 = `C
February 20, 2008
Mr. Don Scruggs
Duke Power Allen Steam Station
243 Plant Allen Road
Belmont,North Carolina 28012
Subject: Toxicity Test Results
Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Gaston County,NC
Dear Mr. Scruggs:
Enclosed is a copy of the toxicity test results relative to the inspection conducted at the
subject facility on January 22 and 25, 2008 by John Lesley of this Office. Effluent samples of
outfall 002 were collected on January 22 and 25, 2008 for use in a chronic pass/fail toxicity test.
The test utilizing these samples resulted in a pass.
The report should be self-explanatory; however, should you have any questions
concerning this report, please do not hesitate to contact Mr. Lesley or me at(704)663-1699.
Sincerely,
for Robert B. Krebs
Regional Supervisor
Surface Water Protection
Enclosure
cc: Central Files
Susan Meadows,Aquatic Toxicology Unit
Gaston County Health Department
4y
1 hCarolina 40144
Naturally Nr.[1E
N.C.Division of Water Quality,Mooresville Regional Office,610 E.Center Ave.Suite 301,Mooresville NC 28115 [phone] Customer Service
1-877-623-6748

Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 2
Whole effluent samples were collected on January 22 and 25,2008 by John Lesley for use
in a chronic Ceriodaphnia dubia pass/fail toxicity test. Duke Power Allen Steam Station outfall
002 is discharged to the Catawba River (7Q10 of 95.0 CFS). The test using these samples resulted
in a pass. Toxicity test information follows:
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentration 24%sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 37.6 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 33.4 neonates
First Sample pH 6.19 SU
First Sample Conductivity 203 micromhos/cm
First Sample Total Residual Chlorine not available due to matrix interferences
Second Sample pH 6.45 SU
Second Sample Conductivity 201 micromhos/cm
Second Sample Total Residual Chlorine <0.0052 mg/1
Test results for these samples indicate that the discharge would not be predicted to have
water quality impacts on the receiving stream.

'r4 ,71: i
Division of Water Quality , =_7CES
41./
July 24, 2006
•V
JUL
2 7 2006
MEMORANDUM
To: Rex Gleason t:
Regional Supervisor, Surface Water Protection, MRO 1.1n
From: Sandy Mort
Quality Assurance Officer, Aquatic Toxicology Unit
Subject: Whole effluent toxicity test results
Duke Power-Allen 002
NPDES Permit#NC0004979/002
Gaston County
The aquatic toxicity test using grab samples of effluent discharged from Duke Power-Allen
002 has been completed. Duke Power-Allen 002 has an effluent discharge permitted at 11.6
million gallons per day(MGD) entering Catawba River(7Q10 of 95.0 CFS). Whole effluent
samples were collected on July 11 and 14, 2006 by John Lesley for use in a chronic
Ceriodaphnia dubia pass/fail toxicity test. The test using these samples resulted in a pass.
Toxicity test information follows.
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentrations 16% sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 24.8 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 27.1 neonates
First Sample pH 6.00 SU
First Sample Conductivity 193 micromhos/cm
First Sample Total Residual Chlorine <0.0052 mg/L
Second Sample pH 6.49 SU
Second Sample Conductivity 185 micromhos/cm
Second Sample Total Residual Chlorine <0.0052 mg/L
Test results for these samples indicate that the effluent would not be predicted to have water
quality impacts on receiving water. Please contact us if further effluent toxicity monitoring is
desired. We maybe reached at [phone].
Basin: CTB34
cc: Central Files
John Lesley, MRO

F W AT-• Michael F.Ea. Governor
„� Rp William G.Ross Jr..Secretary
\�� G North Carolina Department of Environment and Natural Resources
Alan W.Klimek.P.E.Director
> Daja ._l Division of Water Quality
p Y
October 7,2004
Mr. Michael Ruhe,Manager Water Protection
Duke Power Company
PO Box 1006 (EC11E)
Charlotte,North Carolina 28201-1006
Subject: Toxicity Test Results
Duke Power Company Allen Steam Station
NPDES Permit No.NC0004979
Gaston County, NC
Dear Mr. Ruhe:
Enclosed is a copy of the toxicity test results relative to the inspection conducted at the
subject facility on September 24, 2004 by John Lesley of this Office. Effluent Samples were
collected on September 21 and 24, 2004 by Division staff for use in a chronic pass/fail toxicity test.
The test utilizing these samples resulted in a pass.
The report should be self-explanatory; however, should you have any questions concerning
this report,please do not hesitate to contact Mr. Lesley or me at(704) 663-1699.
•
Sincerely,
D. Rex Gleason,P.E.
Water Quality Regional Supervisor
Enclosure
cc: Central Files
Kevin Bowden,Aquatic Toxicology Unit
Gaston County Health Department
NorthCarolina
naturally LA*ALA
NCDENR
N.C.Division of Water Quality,Mooresville Regional Office,610 E.Central Ave.Suite 301,Mooresville NC 28115 [phone] Customer Service
1-877-623-6748

Duke Power—Allen Steam Station
NPDES Permit No. NC0004979
Page 2
Whole effluent samples were collected on September 21 and 24, 2004 by John Lesley for
use in a chronic Ceriodaphnia dubia pass/fail toxicity test. Duke Power Allen Steam Station
outfall 002 has an effluent discharge permitted at 11.6 MGD entering Catawba River(7Q10 of
95.0 CFS). The test using these samples resulted in a pass. Toxicity test information follows:
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentration 16 % sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 19.5 neonates
Test Treatment Survival 91.7 %
Treatment Mean Reproduction 19.2 neonates
First Sample pH 6.99 SU
First Sample Conductivity 161 micromhos/cm
First Sample Total Residual Chlorine <0.0052 mg/1
Second Sample pH 6.43 SU
Second Sample Conductivity 170 micromhos/cm
Second Sample Total Residual Chlorine <0.0052 mg/1
Test results for these samples indicate that the effluent would not be predicted to have
water quality impacts on the receiving stream.

/ / Division of Water Quality 1 ac�E��
ANC
October 4, 2004 1A�R „ FIC
MEMORANDUM OCT 0 7 2004
To: Rex Gleason
Water Quality Supervisor,MRO
Through: Matt Matthews t'
WATER r IOU
Supervisor, Aquatic Toxicology Unit
From: Sandy Mort may( /
Quality Assurance Officer, Aquatic Toxicology Unit
Subject: Whole effluent toxicity test results
Duke Power-Allen 002
NPDES Permit#NC0004979/002
Gaston County
The aquatic toxicity test using grab samples of effluent discharged from Duke Power-Allen 002
has been completed. Duke Power-Allen 002 has an effluent discharge permitted at 11.6 million
gallons per day(MGD) entering Catawba River(7Q10 of 95.0 CFS). Whole effluent samples
were collected on September 21 and 24, 2004 by John Lesley for use in a chronic Ceriodaphnia
dubia pass/fail toxicity test. The test using these samples resulted in a pass. Toxicity test
information follows.
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentrations 16% sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 19.5 neonates
Test Treatment Survival 91.7%
Treatment Mean Reproduction 19.2 neonates
First Sample pH 6.99 SU
First Sample Conductivity 161 micromhos/cm
First Sample Total Residual Chlorine <0.0052 mg/L
Second Sample pH 6.43 SU
Second Sample Conductivity 170 micromhos/cm
Second Sample Total Residual Chlorine <0.0052 mg/L
Test results for these samples indicate that the effluent would not be predicted to have water
quality impacts on receiving water. Please contact us if further effluent toxicity monitoring is
desired. We maybe reached at [phone].
Basin: CTB34
Cc: Central Files
Aquatic Toxicology Unit Environmental Sciences Section

fsiAle-t44
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
919 North Main Street Mooresville,North Carolina 28115
January 8, 2004
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr. Michael A. Ruhe 7003 2260 0001 3491 1081
Duke Energy Corporation—Allen Steam Station
PO Box 1006
Charlotte,North Carolina 28201-1006
SUBJECT: NOTICE OF VIOLATION
Effluent Toxicity Testing
NPDES Permit No.NC0004979/002
Allen Steam Station WWTP
Gaston County
Dear Mr. Ruhe:
This is to inform you that a review of your toxicity self-monitoring report form for the month of
October 2003 indicates a violation of the toxicity limitation specified in your NPDES Permit.
•
You should take whatever remedial actions are necessary to eliminate the conditions causing the
effluent toxicity violation(s). Your efforts may include conducting a Toxicity Reduction Evaluation
(TRE) which is a site-specific study designed to identify the causative agents of effluent toxicity, isolate
the sources of toxicity, evaluate the effectiveness of toxicity control options, and then confirm reductions
in effluent toxicity. Please be aware that North Carolina General Statutes provide for assessment of civil
penalties for violations of NPDES permit limitations and requirements.
The reverse side of this Notice contains important information concerning your Whole Effluent
Toxicity Monitoring and Reporting Requirements. Please note updated mailing addresses for submitting
your Discharge Monitoring Reports (DMRs) and Aquatic Toxicity (AT) Test Forms. We encourage you
to review this information and if it would be helpful to discuss this situation or possible solutions to
resolve effluent toxicity noncompliance, please contact Mr. John Lesley with this office at (704) 663-
1699.
Sincerely,
D. Rex Gleason,P.E.
Regional Water Quality Supervisor
cc: Aquatic Toxicology Unit
Central Files
I

tti)
Michael F.Easley, e�. error
William G.Ross Jr.,Secretary
CO
North Carolina Department of Environment and Natural Resources
> — Alan W.Klimek,P.E.,Director
Division of Water Quality
Coleen H.Sullins,Deputy Director
Division of Water Quality
•
September 29, 2003
Mr. Michael Ruhe, Manager Water Protection
Duke Energy Corporation
Post Office Box 1006 (EC 11 E)
Charlotte,North Carolina 28201-1006
Subject: Toxicity Test Results
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County, NC
Dear Ruhe:
Enclosed is a copy of the toxicity test results relative to the inspection conducted at the
subject facility on September 16, 2003 by John Lesley of this Office. Effluent Samples were
:3M=
collected on September 16 and 19, 2003 by Division staff for use in a chronic toxicity test. The
test utilizing these samples resulted in a pass.
The report should be self-explanatory; however, should you have any questions concerning
this report, please do not hesitate to contact Mr. Lesley or me at [phone].
KLV
Sincerely,
Rex Gleason,P.E.
<Water Quality Regional Supervisor
Enclosure
cc: Central Files
Aquatic Toxicology Unit
Gaston County Health Department
vy.
4
NCDENR
Mooresville Regional Office,919 North Main Street,Mooresville,North Carolina 28115
Phone [phone] Customer Service
Fax [phone] 1-877-623-6748

Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Page 2
Whole effluent samples were collected on September 16 and 19, 2003 by Division staff for
use in a chronic Ceriodaphnia dubia pass/fail toxicity test. Duke Power Allen Steam Station has
an effluent discharge permitted at 11.6 MGD entering the Catawba River(7Q10 of 95.0 CFS).
The test using these samples resulted in a pass. Toxicity test information follows:
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentration 16% sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 28.8 neonates
Test Treatment Survival 91.7%
Treatment Mean Reproduction 26.9 neonates
First Sample pH 6.84 SU
First Sample Conductivity 198 micromhos/cm
First Sample Total Residual Chlorine <0.0052 mg/1
Second Sample pH 6.72 SU
Second Sample Conductivity 192 micromhos/cm
Second Sample Total Residual Chlorine <0.0052 mg/1
Test results for these samples indicate that the effluent would not be predicted to have
water quality impacts on the receiving stream.

v ..
Division of Water Quality we @LPi•OF ENVIRONMENT
- Aquatic Toxicology Unit AND NATURAL NESOl1RC
M ESIIILLEpcGIONAL OFFICE
September 24, 2003 r
SEP 2 9 2003
MEMORANDUM
To: Rex Gleason
Water Quality Supervisor,MRO SAT
k
Through: Matt Matthews i`1
Supervisor,Aquatic Toxicology Unit
From: Sandy Mort 41)4/
Quality Assurance Officer,Aquatic Toxicology Unit
Subject: Whole effluent toxicity test results
Duke Power-Allen 002
NPDES Permit#NC0004979/002
Gaston County
The aquatic toxicity test using grab samples of effluent discharged from Duke Power-Allen 002 has
been completed. Duke Power-Allen 002 has an effluent discharge permitted at 11.6 million gallons
per day(MGD)entering Catawba River(7Q10 of 95.0 CFS). Whole effluent samples were collected
on September 16 and 19,2003 by John Lesley for use in a chronic Ceriodaphnia dubia pass/fail
toxicity test. The test using these samples resulted in a pass. Toxicity test information follows.
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentrations 16% sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 28.8 neonates
Test Treatment Survival 91.7%
Treatment Mean Reproduction 26.9 neonates
First Sample pH 6.84 SU
First Sample Conductivity 198 micromhos/cm
First Sample Total Residual Chlorine <0.0052 mg/L
Second Sample pH 6.72 SU
Second Sample Conductivity 192 micromhos/cm
Second Sample Total Residual Chlorine <0.0052 mg/L
Test results for these samples indicate that the effluent would not be predicted to have water quality
impacts on receiving water. Please contact us if further effluent toxicity monitoring is desired. We
may be reached at(919)733-2136.
Basin: CTB34
cc: Central Files
Environmental Sciences Branch Water Quality Section

State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
919 North Main Street Mooresville,North Carolina 28115
December 21, 2001
3.40 DUOI `1(o33 q�
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr. Michael A. Rhue
Duke Power- Allen SE Power Plant
13339 Hagers Ferry Road
Huntersville, North Carolina 28078
SUBJECT: NOTICE OF VIOLATION
Whole Effluent Toxicity (WET)Testing
NPDES Permit No. NC0004979/002
Duke Power- Allen SE Power Plant WWTP
Gaston County
Dear Mr. Rhue:
This is to inform you that a review of your toxicity self-monitoring report form for the month of
October 2001 indicates a violation of the toxicity limitation specified in your NPDES Permit.
You should take whatever remedial actions are necessary to eliminate the conditions causing the
effluent toxicity violation(s). Your efforts may include conducting a Toxicity Reduction Evaluation
(TRE) which is a site-specific study designed to identify the causative agents of effluent toxicity, isolate
the sources of toxicity, evaluate the effectiveness of toxicity control options, and then confirm reductions
in effluent toxicity. Please be aware that North Carolina General Statutes provide for assessment of civil
penalties for violations of NPDES permit limitations and requirements.
The reverse side of this Notice contains important information concerning your Whole Effluent
Toxicity Monitoring and Reporting Requirements. Please note updated mailing addresses for submitting
your Discharge Monitoring Reports (DMRs) and Aquatic Toxicity (AT) Test Forms. We encourage you
to review this information and if it would be helpful to discuss this situation or possible solutions to
resolve effluent toxicity noncompliance, please contact Mr. John Lesley with this office at (704) 663-
1699.
Sincerely,
ic., D. Rex Gleason, P.E.
Regional Water Quality Supervisor
cc: Aquatic Toxicology Unit
Central Files

-"gligilliq
WHOLE EFFLUENT TOXICITY MONITORING AND REPORTING INFORMATION
)' The following items are provided in art effort to assist you with identifying critical and sometimes overlooked
toxicity testing and reporting information. Please take time to review this information.The items below do not
address or include all the toxicity testing and reporting requirements contained in your NPDES permit. If
you should have any questions about your toxicity testing requirement,please contact Mr. Kevin Bowden with
the Aquatic Toxicology Unit at(919)733-2136 or another Unit representative at the same number.
> The permittee is responsible for ensuring that toxicity testing is conducted according to the permit requirement
and that toxicity report forms are appropriately filed.
> The reporting of whole effluent toxicity testing data is a dual requirement. All toxicity test results must be
entered (with the appropriate parameter code) on your monthly Discharge Monitoring Report which is
submitted to:
North Carolina Division of Water Quality
Central Files
1617 Mail Service Center
Raleigh,NC 27699-1617
IN ADDITION
Toxicity test data(original"AT"form)must be submitted to the following address:
North Carolina Division of Water Quality
Environmental Sciences Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
• Toxicity test results shall be filed with the Environmental Sciences Branch no later than 30 days after the end
of the reporting period(eg,January test result is due by the end of February).
• Toxicity test condition language contained in your NPDES permit may require use of multiple concentration
toxicity testing upon failure of any single quarterly toxicity test. If the initial pass/fail test fails or if the chronic
value is lower than the permit limit, then at least two multiple concentration toxicity tests (one per month)will
be conducted over the following two months. As many analyses as can be completed will be accepted. If your
NPDES permit does not require use of multiple concentration toxicity testing upon failure of any single
quarterly test, you may choose to conduct either single concentration toxicity testing or multiple concentration
toxicity testing per the Division's WET enforcement initiatives effective July 1, 1999. Follow-up multiple
concentration toxicity testing will influence the Division's enforcement response.
• Toxicity testing months are specified by the NPDES Permit, except for NPDES Permits which contain episodic
toxicity monitoring requirements (eg, if the testing months specified in your NPDES permit are March, June,
September,and December,then toxicity testing must be conducted during these months).
> If your NPDES Permit specifies episodic monitoring and your facility does not have a discharge from January 1-
June 30, then you must provide written notification to the Environmental Sciences Branch by June 30 that a
discharge did not occur during the first six months of the calendar year.
> If you receive notification from your contract laboratory that a test was invalidated, you should immediately
notify the Environmental Sciences Branch at(919) 733-2136 and provide written documentation indicating why
the test was invalidated and the date when follow-up testing will occur.
If your facility is required to conduct toxicity testing during a month in which no discharge occurs,you should
complete the information block located at the top of the AT form indicating the facility name, permit number,
pipe number, county and the month/year of the subject report. You should also write "No Flow" on the AT
form,sign the form and submit following normal procedures.
> The Aquatic Toxicity Test forms shall be signed by the facility's Operator in Responsible Charge (ORC) except
for facilities which have not received a facility classification. In these cases, a duly authorized facility
representative must sign the AT form. The AT form must also be signed by the performing lab supervisor.
➢ To determine if your AT test forms were received on time by the Division of Water Quality,you may consider
submitting your toxicity test results certified mail, return receipt requested to the Environmental Sciences
Branch.

t�G DEPI.OF ENViROMMEi�T
Division of Water Quality AND t APTT. '��Ri:seuRcrs
iW00f2ESVO,LE f:;:310t1;4L OFFICE
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� July 30, 2001 P
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AUG 0 1 2001
MEMORANDUM
Water Quality Supervisor,MRO 1,Al. yS CfO
Through: Matt Matthews rOCi-
Supervisor, Aquatic Toxicology Unit
From: Sandy Mort 614M
Quality Assurance Officer, Aquatic Toxicology Unit
Subject: Whole effluent toxicity test results
Duke Power-Allen 002
NPDES Permit#NC0004979/002
Gaston County
The aquatic toxicity test using grab samples of effluent discharged from Duke Power-Allen 002
has been completed. Duke Power-Allen 002 has an effluent discharge permitted at 11.6 million
gallons per day (MGD) entering Catawba River (Lake Wylie) (7Q10 of 95.0 CFS). Whole
effluent samples were collected on July 17 and 20 by John Lesley for use in a chronic
Ceriodaphnia dubia pass/fail toxicity test. The test using these samples resulted in a pass.
Toxicity test information follows.
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentrations 16% sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 29.4 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 28.5 neonates
First Sample pH 6.76 SU
First Sample Conductivity 167 micromhos/cm
First Sample Total Residual Chlorine <0.1 mg/1
Second Sample pH 6.81 SU
Second Sample Conductivity 165 micromhos/cm
Second Sample Total Residual Chlorine <0.1 mg/1
Test results for these samples indicate that the effluent would not be predicted to have water
quality impacts on receiving water. Please contact us if further effluent toxicity monitoring is
desired. We may be reached at [phone].
Basin: CTB34
cc: Central Files
Environmental Sciences Branch Water Quality Section