NC0004979_Regional Office Historical File Pre 2018 (2)

2 DUKE Laserfiche Allen Steam Station
��� RECEIVEDINCDENR/DWR 53 Plant Allen Roao
ENERGY® Belmont. NC 28012
OCT i. 0 2019
704 829-2857
WQROS
MOORESVILLE REGIONAL OFFICE
October 9, 2019
Ms. Julie Grzyb
North Carolina Department of Environmental Quality
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Allen Steam Station
NPDES Permit NC0004979
Permit Change Request in accordance with re-opener clause
Dear Ms. Grzyb:
With respect to the 5th Circuit recently upholding the EPA's two-year delay of the
Effluent Limitations Guideline (ELG) dates, November 1 , 2020 is the earliest date for
implementation of the more stringent ELG requirements for Flue Gas Desulfurization
(FGD) treated wastewater. With this ruling, in accordance with permit re-opener clause
found in condition A.(8) it is requested that effective date of February 28, 2020 for FGD
internal Outfall 005 for Plant Allen be changed to November 1, 2020 to align with 40
CFR Part 423.
In addition to the above request, Duke Energy Carolinas, LLC has recently surveyed the
compliance boundary for the ash basin. Attached is a figure that depicts a slight
revision to this boundary. It is requested that this figure be accepted as the official
compliance boundary of the ash basin.
If you have questions, please contact Robert Wylie at [phone].
Sincerely,
. .
Terry Tuck, General Manager II
Allen Steam Station
cc: Ori Tuvia
UPS Tracking: Raleigh: 1Z X67 601 24 9828 4247
Mooresville: 1Z X67 601 24 9527 9651

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DUKE ENERGY CAROLINAS ALLEN STEAM
STATION SITE BOUNDARY ,;
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NOTES 'l. ENERGY GRAPHIC SCALE IN FEET
ALL BOUNDARIES ARE APPROXIMATE WASTE AND COMPLIANCE BOUNDARIES
PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS DRAWN BY:C.W DATE:10/03/2019
REVISED BY:C.WY DRAWN
DA7E:10/03l2019 ALLEN STEAM STATION
AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON APPROVED BY:L.DRAGO DATE:10/03/2019 BELMONT
DECEMBER 73.2078.AERIAL WAS COLLECTED ON MARCH 30,2018 , CHECKED BY:L.DRAGO DATE:10/03/2019 , NORTH CAROLINA
synTerra PROGRAM MANAGER C SUITEIL
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA
STATE PLANE COORDINATE SYSTEM FIPS 3200 INAD83I www.Synterracorp.com

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LsetiiChe
�' DUKE James Wells
�' ENERGY Vice President
® Environmental,Health and Safety
Programs&Environmental Sciences
526 South Church Street
Charlotte,NC 28202
[phone]
71;clv_oiNCOENRrpv -
July 23, 2019 JUL 2 5 2019
Via Overnight Mail
Corey Basinger
Mooresville Regional Office Regional Supervisor
North Carolina Department of Environmental Quality
Division of Water Resources
Water Resources - Water Quality Regional Operations
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Bob Sledge
North Carolina Department of Environmental Quality
Water Quality Permitting Program
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Report Under Special Order by Consent—EMC SOC WQ S 17-009
Duke Energy Carolina, LLC —Allen Steam Station
NPDES Permit NC0004979
Quarterly Progress Report for 2nd Quarter 2019
Dear Messrs. Basinger and Sledge:
On behalf of Duke Energy Carolinas, LLC (DEC), I am submitting to you the Allen Steam Station
Progress Report summarizing the work and activities undertaken with respect to closure of coal
ash surface impoundments as required by the Allen Steam Station NPDES Permit NC0004979
Special Order by Consent (SOC), SOC No. S 17-009 Section 2.c.2).
As required by the SOC, 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 fine and imprisonment for knowing violations.

Background and Summary
On April 18, 2018, Duke Energy Carolinas, LLC (DEC) and the North Carolina Environmental Management
Commission entered into a Special Order by Consent—EMC SOC S17-009(SOC)applicable to the Allen Steam
Station(Allen). This report is submitted in accordance with Section 2c.of the SOC. In compliance with Section
2.c., this report summarizes the work and activities undertaken with respect to decanting work and closure
of coal ash surface impoundments at Allen. The quarterly reports are due no later than the last day of
January,April,July, and October for the duration of the SOC, once the decanting process has begun.
Allen Steam Station is located in Belmont, NC,along the west shore of Lake Wylie. Lake Wylie is a man-made
reservoir created by the impoundment of the Catawba River. Allen is a five-unit, 1140 megawatts,coal-fired
generating facility. The Allen Station began commercial operation in 1957 with Units 1 and 2. Unit 3 began
operation in 1959, Unit 4 in 1960, and Unit 5 in 1961. The ash basins at Allen cover approximately 293 acres
with a current ash inventory of approximately 19.3 million tons of ash as of May 2019, which is inclusive of
the Active Ash Basin, Retired Ash Basin, Retired Ash Basin Landfill, and the Distribution of Residual Solids
facilities.
Allen historically wet sluiced coal combustion residual (CCR) products into two surface impoundments
located on the property. These surface impoundments are known as the Retired Ash Basin (also referred to
as the Inactive Ash Basin) and the Active Ash Basin, which are impounded by the following dams:
• Retired Ash Basin (GASTO-016)
• Active Ash Basin (GASTO-061)
The Retired Ash Basin received CCR products from initial operation in 1957 until 1973, when it reached
capacity and was retired. Allen then commissioned the Active Ash Basin and began wet sluicing CCR products
into this new basin. In 2009, Allen replaced its fly ash wet sluicing operation with a dry ash handling system
and began placing dry fly ash into a landfill constructed over a portion of the Retired Ash Basin (Permit No.
36-12). Allen ceased wet sluicing of bottom ash in February 2019 when the dry bottom ash system became
operational. The Active Ash Basin was removed from service in February 2019 upon the completion of dry
bottom ash handling and diversion of all other wastewater flow to a newly lined retention basin.
Decanting Status
In compliance with this SOC, Duke Energy initiated design and procurement efforts in Q3 2018 for a decanting
water treatment system at Allen. Purchase Orders were awarded in January 2019 for the WWTS pad and
electrical infrastructure installations, as well as a Purchase Order for the OEM water treatment supplier.
Wastewater flows were removed from the basin on February 9, 2019. Duke Energy provided advance notice
for the projected start date of decanting to NCDEQ on January 24, 2019, as required by the NPDES Permit,
and written notification for the Initiation of Decanting per the SOC on February 14, 2019. Through June 30,
2019, approximately 9 million gallons has been decanted at Allen.
Allen: 1

S DUKE Allen Steam Station
Road
ENERGY. Las e rfl c h eECEVED/NCDENR/DWR 253lm Plant NC 8012
Belmont,NC 28012
JAN257n11,1
WQROS
MOORESV!i I.F REGIONAL OFFICE
January 24, 2019
NC Department of Environmental Quality
Division of Water Resources -Water Quality Regional Operations
Attn: Corey Basinger
610 East Center Avenue
Suite 301
Mooresville, NC 28115
Subject: Commencement of Decanting
Allen Steam Station
Permit No. NC0004979
Gaston County
Dear Mr. Basinger:
Duke Energy respectfully submits notification of commencement of decanting, no later than
seven days prior, as required by Section A.( 2.) of the NPDES Wastewater Permit NC0004979.
Should you have any questions regarding this submittal or require additional information, please
contact Elizabeth Glenn at [phone] or email [e-mail].
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.
Sincerely,
Terry W. Tuck
General Manager II
Allen Steam Station
Fossil/Hydro Operations - Carolinas Coal Generation
Cc: Mooresville Regional Office, DWR
Randy Gantt - via email
Shannon Langley - via email
UPS Tracking: 1Z X67 601 24 9402 6550

DUKE Laserfiche_icErvizo`N uEN.R;D AII253Plan AllenRoaoENERGY, Belmont, NC 28012
JAN25 ?019
WQRos
MOORFSVILLF RF^inNAL OFFICE
January 24, 2019
Mr. Corey Basinger
Regional Office Supervisor NC DWR
610 East Center Avenue,
Suite 301
Mooresville, NC 28115
Subject: Installation of Ultrafiltration System
Allen Steam Station
Permit No. NC0004979
Gaston County
Dear Mr. Basinger:
Duke Energy is adding an Ultrafiltration (UF) to the existing Flue Gas Desulfurization (FGD)
wastewater treatment system at the subject facility. This change was communicated to the
Division of Water Resources as part of the NPDES permit application for Allen Steam Station
dated August 31, 2017. The installation of the UF unit is scheduled to be completed in February
2019. This letter is intended to provide a courtesy notification of the process startup.
The UF system will begin testing in February. The compliance sampling location for internal
outfall 005 will not be affected by the UF system installation. The Allen Steam Station is already
classified as a Class II Physical/Chemical wastewater system so no change in classification is
necessary.
If you have any questions concerning this letter, please contact me at elizabeth.glenn@duke-
energy.com or 980-373-0530.
Sincerely,
J. lizabeth Glenn
Sr. Environmental Specialist
Cc: Julie Grzyb - NC DWR 1617 Mail Service Center Raleigh, NC 27699-1617
Elizabeth Glenn/Filenet- via email
Richard Baker- via email
Keith Ambrose -via email

DUKE 'tFCE_IVED1NCDENR/DWR Allen Steam Station
44, 2
ENERGY®
{(, Belmont,Plant Allen Roaa
NC 280128012
I111Q`..0„
MOORESV!LI F REGIONAL OFFICE
February 14, 2019
Linda Culpepper, Director
Laserriche
North Carolina Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1616
Subject: Duke Energy Carolinas, LLC
Allen Steam Station
Special Order by Consent
EMC SOC WQ S 17-009
Completion Notification
Dear Ms. Culpepper:
In accordance with the NC Environmental Management Commission Special Order by Consent,
EMC SOC WQ S 17-009, Duke Energy Carolinas, LLC. (Duke) is hereby submitting this
notification that decanting was initiated on February 9, 2019. This notice fulfills our obligation
found in the subject Order's Section 2. b. Compliance Schedule.
If you have any questions, please contact Elizabeth Glenn [phone] or Shannon Langley
[phone].
/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. 1 am aware that there are significant penalties
for submitting false information, including the possibility of fines and imprisonment for knowing violations.
Sincerely,
Terry W. Tuck
General Manager II
Allen Steam Station

Page 2
Cc: Bob Sledge
NC Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Mr. Corey Basinger, RO Supervisor NC DWR
610 East Center Avenue,
Suite 301
Mooresville, NC 28115
SME/FileNet
Richard Baker—via email
UPS Tracking: Raleigh LC: 1Z X67 601 24 9235 7812
Raleigh BS: 1Z X67 601 24 9037 3825
Mooresville: 1Z X67 601 24 9388 2636

4,45 WDUKE Allen Steam Station
ENERGY® 253 Plant Allen
Belmont.NCC 28012>2
Laserfiche
May 23, 2019
RECEIVED/NCOENR/DWR
NC Department of Environmental Quality
Division of Water Resources - NPDES Complex Permitting MAY 28 7.014
Attn: Sergei Chernikov
1617 Mail Service Center WOROS
Raleigh, NC 27699-1617 MOORESVILLE REGIONAL OFFICE
Subject: Installation of Temporary Treatment Equipment
Allen Steam Station
NPDES Permit No. NC0004979
Gaston County
Dear Dr. Chernikov:
Duke Energy respectfully submits notification, within seven calendar days of installation of
temporary additional physical-chemical treatment at wastewater Outfall 002, as per Condition
A.(2.) for the purposes of decanting and dewatering of the ash basin.
Should you have any questions regarding this submittal or require additional information, please
contact Robert Wylie at [phone] or email [e-mail].
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.
Sincerely,
ja,t,.—? ‘LawaC/
Terry W. Tuck
General Manager II
Allen Steam Station
Fossil/Hydro Operations - Carolinas Coal Generation
Cc: Ori Tuvia NCDEQ DWR - 610 E. Center Ave. Suite 301 Mooresville, NC 28115
Randy Gantt - via email
Robert Wylie — FileNet
UPS Tracking: Raleigh: 1Z X67 601 24 9960 4041
Mooresville: 1Z X67 601 24 9698 3450

�' DUKE Laserfjche James e Wells
ENERGY Vice President
® Environmental,Health and Safety
Programs&Environmental Sciences
526 South Church Street
Mail Code EC13K
Charlotte,NC 28202
[phone]
RECEIVED/NCDENR/DWR
April 24, 2019
Via Overnight Mail WOROS
MOORESVILLE REGIONAL OFFICE
Corey Basinger
Mooresville Regional Office Regional Supervisor
North Carolina Department of Environmental Quality
Division of Water Resources
Water Resources -Water Quality Regional Operations
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Bob Sledge
North Carolina Department of Environmental Quality
Water Quality Permitting Program
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Report Under Special Order by Consent—EMC SOC WQ S 17-009
Duke Energy Carolina, LLC—Allen Steam Station
NPDES Permit NC0004979
Quarterly Progress Report
Dear Messrs. Basinger and Sledge:
On behalf of Duke Energy Carolinas, LLC (DEC), I am submitting to you the Allen Steam Station
Progress Report summarizing the work and activities undertaken with respect to closure of coal
ash surface impoundments as required by the Allen Steam Station NPDES Permit NC0004979
Special Order by Consent (SOC), SOC No. S 17-009 Section 2.c.2).
As required by the SOC, 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 fine and imprisonment for knowing violations.

Messrs. Basinger and Sledge
April 24, 2019
Page 2
Please direct any questions concerning the Allen Steam Station NPDES Permit NC0004979 SOC
No. S 17-009 to Elizabeth Glenn at [phone].
Sincerely,
James \ ells
Vice ' e ident, Environment, Health & Safety-
Programs and Environmental Sciences
Duke Energy
Attachment:
Allen Steam Station Quarterly Progress Report
CC: Richard Baker, Duke Energy
Elizabeth Glenn, Duke Energy
Randy Gantt, Duke Energy
George Hamrick, Duke Energy
Paul Draovitch, Duke Energy
Matt Hanchey, Duke Energy
Randy Hart, Duke Energy

V
NPDES PERMIT NC0004979
SPECIAL ORDER BY CONSENT EMC SOC S17-009
QUARTERLY PROGRESS REPORT
ALLEN STEAM STATION
APRIL 24, 2019

Vckround
and Summary
On April 18, 2018, Duke Energy Carolinas, LLC (DEC) and the North Carolina Environmental Management
Commission entered into a Special Order by Consent— EMC SOC S17-009 (SOC) applicable to the Allen
Steam Station (Allen). This report is submitted in accordance with Section 2c.of the SOC. In compliance
with Section 2.c., this report summarizes the work and activities undertaken with respect to decanting
work and closure of coal ash surface impoundments at Allen. The quarterly reports are due no later than
the last day of January, April, July, and October for the duration of the SOC, once the decanting process
has begun.
Allen Steam Station is located in Belmont, NC, along the west shore of Lake Wylie. Lake Wylie is a man-
made reservoir created by the impoundment of the Catawba River. Allen is a five-unit, 1140 megawatts,
coal-fired generating facility. The Allen Station began commercial operation in 1957 with Units 1 and 2.
Unit 3 began operation in 1959, Unit 4 in 1960, and Unit 5 in 1961. The ash basins at Allen cover
approximately 293 acres with a current ash inventory of approximately 19.3 million tons of ash as of
February 2019, which is inclusive of the Active Ash Basin, Retired Ash Basin, Retired Ash Basin Landfill,
and the Distribution of Residual Solids facilities.
Allen historically wet sluiced coal combustion residual (CCR) products into two surface impoundments
located on the property. These surface impoundments are known as the Retired Ash Basin (also referred
to as the Inactive Ash Basin) and the Active Ash Basin,which are impounded by the following dams:
• Retired Ash Basin (GASTO-016)
• Active Ash Basin (GASTO-061)
The Retired Ash Basin received CCR products from initial operation in 1957 until 1973, when it reached
capacity and was retired. Allen then commissioned the Active Ash Basin and began wet sluicing CCR
products into this new basin. In 2009, Allen replaced its fly ash wet sluicing operation with a dry ash
handling system and began placing dry fly ash into a landfill constructed over a portion of the Retired Ash
Basin (Permit No. 36-12).Allen ceased wet sluicing of bottom ash in February 2019 when the dry bottom
ash system became operational. The Active Ash Basin was removed from service in February 2019 upon
the completion of dry bottom ash handling and diversion of all other wastewater flow to a newly lined
retention basin.
Closure Plans
A number of potential closure options are being considered for Allen. Following a comprehensive
assessment, Duke Energy will submit its Closure Plan to NCDEQ for review and approval in accordance
with CAMA requirements.
Decanting Status
In compliance with this SOC, Duke Energy initiated design and procurement efforts in Q3 2018 for a
decanting water treatment system at Allen. Purchase Orders were awarded in January 2019 for the WWTS
pad and electrical infrastructure installations, as well as a Purchase Order for the OEM water treatment
supplier. Wastewater flows were removed from the basin on February 9, 2019. Duke Energy provided
advance notice for the projected start date of decanting to NCDEQ on January 24, 2019, as required by
the NPDES Permit, and written notification for the Initiation of Decanting per the SOC on February 14,
2019.
Allen: 1

(' UE Laserfiche RGYVice President
® Environmental,Health and Safety
Programs&Environmental Sciences
526 South Church Street
Mail Code EC13K
Charlotte, NC 28202
[phone]
RECEIVEDINCDENRIDWR
April 24, 2019
•
Via Overnight Mail 'NCROS
MOORESVILLE REGIONAL OFFICE
Corey Basinger
Mooresville Regional Office Regional Supervisor
North Carolina Department of Environmental Quality
Division of Water Resources
Water Resources -Water Quality Regional Operations
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Bob Sledge
North Carolina Department of Environmental Quality
Water Quality Permitting Program
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Report Under Special Order by Consent—EMC SOC WQ S 17-009
Duke Energy Carolina, LLC—Allen Steam Station
NPDES Permit NC0004979
2018 Annual Seep Survey Report
Dear Messrs. Basinger and Sledge:
On behalf of Duke Energy Carolinas, LLC (DEC), I am submitting to you the Allen Steam
Station Annual Seep Report summarizing the findings of the comprehensive survey and to begin
addressing decanting impacts on the seeps as required by the Allen Steam Station NPDES Permit
NC0004979 Special Order by Consent (SOC), SOC No. S 17-009 Section 2.c.3).
The attached report was for events conducted during 2018 following issuance of the SOC.
During Q 1 2019 and as reported to Mr. Sledge on April 3, 2019, an additional seep has been
identified near the Active Ash Basin Cell 1 seep collection system, designated as S-10, due to a
pumping system malfunction. Duke Energy requests coverage in the SOC of system
malfunctions at S-10 and the resulting seepage noted as a new identified seep, S-12. Seepage
from this area drains to a stormwater drainage ditch, discharging to the Catawba River and is
monitored via the Allen SOC upstream and downstream quarterly sampling events. For clarity,
Duke Energy will continue to pump this system back to the ash basin in accordance with the

Messrs. Basinger and Sledge
April 24, 2019
Page 2
design of the pumping system. Coverage is sought for non-routine instances where the system
may experience a malfunction.
As required by the SOC, 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 fine and imprisonment for knowing violations.
Please direct any questions concerning the Allen Steam Station NPDES Permit NC0004979 SOC
No. S 17-009 to Elizabeth Glenn at [phone] and to Chris Hallman at [phone]
relative to the annual seep inspection report.
Sincerely,
James Wells
Vice Pr ident, Environment, Health & Safety-
Programs and Environmental Sciences
Duke Energy
Attachment:
Allen Steam Station 2018 Annual Seep Survey
CC: Richard Baker, Duke Energy
Elizabeth Glenn, Duke Energy
Chris Hallman, Duke Energy
Randy Gantt, Duke Energy
Paul Draovitch, Duke Energy
Matt Hanchey, Duke Energy

synTerra
2018 ANNUAL SEEP REPORT
ALLEN STEAM STATION
EMC SOC WQ S17-009
235 PLANT ALLEN ROAD
BELMONT, NC 28012
APRIL 2019
PREPARED FOR
DUKE ENERGY CAROLINAS, LLC
DUKE
.. ENERGY.
CAROLINAS
4I/L9
Erin N. Ki ey, EIT
Project Engineer
Chas Suttell, NC LG #2426
Project Manager

2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Carolinas,LLC
SynTerra
TABLE OF CONTENTS
SECTION PAGE
1.0 INTRODUCTION 1
2.0 FINDINGS 3
2.1 General Observations 3
2.2 Impact of Decanting 3
2.3 Changes to Seep Status 3
3.0 REFERENCES 4
LIST OF FIGURES
Figure 1 SOC Locations and Inspection Areas
LIST OF TABLES
Table 1 SOC Locations and Descriptions-2018 Inspection
LIST OF APPENDICES
Appendix A Photographs
Page i

2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Carolinas,LLC SynTerra
LIST OF ACRONYMS
AOW Areas of Wetness
CCR Coal Combustion Residuals
EMC Environmental Management Commission
SOC Special Order by Consent
Page ii

2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Carolinas,LLC SynTerra
1.0 INTRODUCTION
On June 6, 2018, Chris Suttell (NC L.G. #2426) of SynTerra inspected the Allen Steam
Station (Allen or Site) for existing and potential new areas of wetness (AOWs). The
aforementioned activities were performed in accordance with North Carolina Special
Order by Consent EMC WQ #S17-009. That Special Order by Consent (SOC) describes
inspection requirements as follows:
Duke Energy shall conduct annual comprehensive surveys of areas down gradient of ash
basins identifying new seeps, and documenting the physical characteristics of previously
documented seeps. All examinations of seeps must include identification of seeps by
approximate latitude and longitude and date-stamped digital photographs of their
appearance. A report summarizing the findings of the surveys, including a section
analyzing the effect decanting of the basin(s)has on seep flows, accompanied by copies of
the photographs noted above ("Annual Seep Report"), shall be submitted to DWR in
conjunction with submittal of the April 30 quarterly report noted in 2(c)(2)above. This
Annual Seep Report must list any seep that has been dispositioned (as described below)
during the previous year, including an analysis of the manner of disposition.
All locations listed in Table 1 of the SOC were observed and documented with
photographs during the inspection.
General inspection observations include:
• No previously unidentified seeps were observed during the inspection.
• No notable changes to seep status were observed during this inspection.
• Decanting had not begun at the time of this inspection.
Page 1

2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Carolinas,LLC SynTerra
Inspection Details
Weather during and preceding the inspection was clear. Temperatures ranged from
approximately 65 to 88 degrees F. No significant rain (>0.1 inch) occurred in the three
days before the inspection according to the onsite rain gage.
The inspector reviewed previous AOW inspection reports and the weekly dam safety
inspection reports for each ash basin. Scott Harris (Duke Energy system owner)
conducted the ash basin dam safety inspections and prepared the reports. Mr. Harris,
Ms. Mary Parlemon (Duke Energy CCP Field Support) and Mr. Chris Hallman (Duke
Energy Subject Matter Expert) were interviewed concerning recent rainfall amounts,
recent construction/stabilization projects associated with the ash basins, and general site
conditions in and around the ash basins. Observations from the dam safety inspection
reports were consistent with observations made during the SOC inspections.
The inspection included observations in the following areas (Figure 1):
• The East Dam, between the Coal Pile and Retired Ash Basin
• The North Dike,between the Retired Ash Basin and the Active Ash Basin
• The East Dam, between Lake Wylie and the Retired Ash Basin
• The East Dam, between Lake Wylie and the Active Ash Basin
• South and southeast of the Active Ash Basin extending to Lake Wylie
The inspection scope of work included a review of the areas identified as downgradient
of the ash basin. SOC locations are shown on Figure 1. Observations noted during the
inspection are summarized on Table 1 and discussed in Section 2. Photographs of each
seep location are included in Appendix A.
Page 2

2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Carolinas,LLC SynTerra
2.0 FINDINGS
2.1 General Observations
Inspection observations are shown for each seep in Table 1. Details include:
• Flow at S-02 was noticeably greater than observed during previous AOW
inspections and likely caused by water draining from a designated wetland
upgradient. Flow continued overland toward Lake Wylie.
• Potential flow was submerged in areas where flow had been observed during
previous inspections, notably at S-05, S-06, and S-07.
• No flow was observed from stormwater pipes designated SW013-1 through
SW013-13.
2.2 Impact of Decanting
Decanting of the ash basin at Allen had not yet begun at the time of this inspection.
2.3 Changes to Seep Status
Mr. Suttell inspected each seep to evaluate whether it may be dispositioned in
accordance with the SOC. The requirements for dispositioning a seep are as follows:
For purposes of this Special Order, "dispositioned"includes the following: (1) the seep is
dry for at least three consecutive quarters; (2) the seep does not constitute, and does not
flow to, waters of the State or Waters of the United States for three consecutive quarters;
(3) the seep is no longer impacted by flow from any coal ash basin as determined by the
Director of DWR in accord with applicable law and best professional judgment;or(4) the
seep has been otherwise eliminated(e.g., through an engineering solution). If a seep that
has been dispositioned through drying up reappears in any subsequent survey, such a
seep will no longer be deemed dispositioned and can be subsequently re-dispositioned as
specified above. Non-constructed seeps described in paragraph 1(h) of this SOC cannot be
dispositioned through option (2) above.
Seeps dispositioned during 2018 were done so at the time of the SOC issuance. Table 1
lists those seeps dispositioned and the basis for disposition. Seeps identified as
dispositioned at Allen are S-01 and S-09 These dispositioned seeps will continue to be
inspected and evaluated for any change in flow conditons.
In general, there was no change in status of the dispositioned seeps and no change in
status of remaining seeps observed during this inspection.
Page 3

2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Carolinas,LLC SynTerra
3.0 REFERENCES
North Carolina Department of Environmental Quality. (2018). Special Order by Consent
EMC SOC WQ S17-009.
Page 4

2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Progress,LLC SynTerra
FIGURE

IV' ._ , .
7'k \ �� ` ..lea r I
1T _ — ;_
x.
•
A j \
� \ 1 CATAWBA RIVER
9 •
',^ 1 'moo �^e
.. ,�
• STEAM
•
S �!Y dTAllill``,f—'
r r�P� -
GpB f PLANT WATER
Cµp�E "W * •,(1 1' STRUCTURE
75 • a S\ . d A+,.
\..
1
a 1
,*t
Y E,yy , a FILE /
* --. ' r�1 f 1 Ifs 6.A 'yF - -
s
. s .,, B F 1 1
) e
. e • F y
, a . , :.3' e . � 1 1A
f ASH 1
Y ct r RETIRED MOWN' I 1 1 .. .. Y I
ASH BASIN I I I ' ' L__ __-
- t
A ' 1
. f
8D,�
0 la.
`v mar•»•w. !
--- _.. s
LEGEND �'- acBAS
e ___ rASN BASIN
NPDES CONSTRUCTED SEEPS , -..,., qs tik
(APPROXIMATE) €� ia'(df j
ya'' f tB p,,,, k OA
� SOC NON-CONSTRUCTED SEEP -.3.�.� Ill y. I'
(APPROXIMATE) - `!i xer -
AOW NOT INCLUDED IN SOCINPDES JJJ - .,
(APPROXIMATE) _.: �I
4. SEEP DISPOSITIONED BY SOC yr .., >
, :
(APPROXIMATE) � �'� `--'""--."t -. '.
—
ACTIVE ASH BASIN WASTE BOUNDARY .,•_�.. "+y
___ ACTIVE ASH BASIN COMPLIANCE
BOUNDARY '
---,RETIRED ASH BASIN WASTE BOUNDAR � A.,'-
_RETIRED ASH BASIN ASH LANDFILL /
WASTE BOUNDARY • • �'± i RETIRED ASH BASIN ASH LANDFILL_-
_ A t �."`s'�"��
•COMPLIANCE BOUNDARY - _
---•DORS FILLS BOUNDARIES • .}�ia* :y ,
_DUKE ENERGY CAROLINAS ALLEN PLANT EED °BOUNDARY .t
, CATAWBA RIVER ''
®IN
SPESPECIACTIONL ORDER BAREA '^Y CONSENT(SOC) •
a (LAKE WYLIE)
�—STREAM(AMEC NRTR 2015) - 1
®WETLAND(AMEC NRTR 2015) ' ;a
' ML ORDER BY CONSENT(SOL)LOCATIONS ARE DESCRIBED IN 1., •
EMC SOC WOSIT.009 -
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM INPOES) ' t
LOCATIONS ARE DESCRIBED IN PERMIT NC00099T9 _. {.
THE STREAMS AND WETLANDS JURISDICTIONAL DETERMINATION 1 375 0 375 ' T50
WAS PERFORMED BY TAYLOR WISEMAN AND TAYLOR(IWT)AND `1 FIGURE 1
ASSIGNED USAGE BSAW.2014001BB. THESE WETLANDS AND r GRAPHIC SCALE IN FEET
STREAMS WERE APPROVED BY THE US ARMY CORPS OF SOC LOCATIONS AND INSPECTION AREAS
ENGINEERS(USAGE)ON MAY 16.2016 Te'"^ 5MM RIVER
GREENVIILLLE SOUTH SURE
29601 ALLEN STEAM STATION
RIAL PHOTOGRAPHY OBTAINED FR.GOOGLE EARTH PRO ON PHONE [phone]
•CENSER 13.2018 AERIAL WAS COLLECTED ON MARCH 30.2016 .(`DUKE ""'"""'^"' DUKE ENERGY CAROLINAS,LLC
DRAWING HAS BEEN SET OATH A PROJECTION OF NORTH CARa2A -''ENERGY O9E°°/10T301 BELMONT,NORTH CAROLINA
STATE PLANE COORDINATE SYSTEM FPS 3200(NADB3) - OIECRE°BY. CRAW LL

TABLE 1
SOC LOCATIONS AND DESCRIPTIONS-2018 INSPECTION
ALLEN STEAM STATION
DUKE ENERGY CAROLINAS,LLC,BELMONT,NC
Location Coordinrtes Retaining Receiving
Fadlity Sample ID Waterbo0 Waterbody
catlO Description SOC Monitoring Interim Action Locale Notes from Inspection
LrtRude LongRude Y GasslBcation
Allen 5-01• 35.170632 -81.010093 Caawba River WS-V;B Located south of active ash basin.Flow Is in approximately foot wide NA-Seep Disposltioned NA-Seep Dlspositloned Stream flowing at a trickle.Water emerges from face of the
(Lake Wylie) channel flowing southeast to Lake Wylie.Vla sampling-No CCR Impacts bank at a steady M[kle.
Dry channel.Orange aerobic baderlWfloc/Iron-oxidation
Catawba River Located south of active ash basin at toe of dike.Flows to approximately 3 Monitoring at point prior to pH 5-10 S.U. apparet on substate.Wetness observed 50 yards upgradiet
Allen 5-02 35.173761 -81.00578 (Lake Wylie) WS-V;B foot wide channel that flows to Lake Wylie entering Lake Wylie Hardness 400 mg/L of sign that Infiltrates along channel before AOW sign with no
apparent re-emergence.
Moderate and steady flow that emerges from low areas at the
Allen 5-05 35 17688 -8i 888887 (LakeWyyl e)r WS-V'B LoI termitte tf nconfinedbdiffuse flow towards LakevWylieank. InstreLake Wyl ering of NA-28 Standards Apply systeme(ript ap blanket)andschanneledctoward Lake Wylie.NIo
apparent discoloration of water or substrate.
Allen 5-06 35 177049 -81.006128 Catawba River WS V'B Located east of active ash basin,between dike and river bank. Instream Monitoring Of NA-28 Standards AppIy Steady flow.
(Lake Wylie) Intermittent,unconfned diffuse flow towards Lake Wylie. Lake Wylie No apparent discoloration of water or substrate.
Cat
River Located east of active ash basin,between dike and river bank. Instream Monitoring of Slow steady flow observed from boat.
Allen 5-07 35.177736 -81.006334 (Lake Wylie) WS-V,B Intermittent,unconfined diffuse Flow towards Lake Wylie. Lake Wylie NA-2B Standards Apply From ad,no flowing water is apparent.
No apparent discoloration of water or substrate.
Allen 5-09•• 35.185838 -81.00585 Catawba River WS V;B Former seep with flow through 24"corrugated metal pipe.Pipe has been NA-Seep Dlsposltloned NA-Seep Dispositioned Not inspected,dlsposltloned.
(Lke Wylie) grouted;discharge eliminated.
a vs r x �gp r ......mom "gg T`a °^}e., 5 e,x="'"^ .-v s }[r{+r�Y 7k
"�'" =8 ;z >;,; ,�:�„Cl,,,,u,�`.. ,i,., .talz,«t ';s..", aur'1k.v ,. ,c , ", ��',-e x �`. '.�M..,,.,�... . I .t,`+.� ;',qa tiret.>
Moderate and steady flow that emerges from low areas at the
Tae Drain OOtfaII Catawba Pin NA-Monitored per terms of east toe of the active ash basin that Is captured by a toe drain
Allen 103(5-03) 35.1752 -81.006 (Lake Wylie) WS-V;B Constructed toe drain. the NPDES permit NA-26 Standards Apply system(rip rap blanket)and channeletl toward Lake Wylie.
Slight Iron-oxitl121n9 baLterla on substrate and bioFllm on
headwaters and within stream.
Moderate and steady flow that emerges from low areas at the
east toe of the active ash basin that is captured by a toe drain
Allen Toe Drain Outlall 35.17569 -81.00606 Catawba River WS_V,B Constructed toe drain. NA-Monitored per terns of NA-28 Standards Apply 51'Stem(rip rap blanket)and channeled i film Lake Wylie.
104(504) (Lake Wylie) the NPDES permit Water Is generally dear but has some hloFllm on the water
surface and orange Iron-oxld10ng bacteria observed on
substrate.
T Drain OutfaII Caawba Riv NA-Monitored per terms of Flow that emerges from low areas at the east toe of the active
Allen oe 10 r(S 08) 35.1785 -81.0064 (Lake Wylie)er WS-V;B Constructed toe drain. the NPDES permit NA-28 Standards Apply ash basin that is captured within a 12-Inch metal Culvert
draining toward Lake Wylie.
Allen To1e0 88a(S-OBtBaI 35.17816 -81.006517 Catakeb W yv NA-Monitored per terms of Flow that emerges from low areas at the east toe of the active
WS-V;B Constructed toe drain. the NPDES pertnk NA-26 Standards Apply ash basin toward a culvert directed away from dike toward Lake
Wylie.
Prepared by:toe cleccked by:00t
Lets
•-Laatbn previously Imeetgated as a seep.Monitoring has not Indicated the presence of coal combustion residual.
••-Seep duposabnd vb repair and/or non Renting condition to potentially reach Waters of the U.5.,or other,as noted.Monitoring shall be conducted at the approximate locations Indicated on the attached see map.
AN monitoring shall be conducted per the requirements feud b Attachment B of this Order.
2B-ISA NGC 021.0202 Standard
LLB-Coal Combustion Residuals
mg/L-milligrams per liter
NA-Not appllobb
NPDES-National Pollutant Discharge System
S.U.-Standard Units
SOc-Spedal Oche by Consent
SOL Tables-ALL_Fkal_201s_01_17 Page 1 of 1

2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Progress,LLC SynTerra
APPENDIX A
PHOTOGRAPHS

PPFIF'
2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Carolinas,LLC SynTerra
4
`..r:_ ,-
r.
• r' ' *
r,l
•
"•
, �d} .
a
S-01 View of dispositioned seep location S-01 facing southwest.
; _-
x
'zW
►,;
•a
i
I
S-02 View ,,t th, --,( k_sample location facing wc-,t.
L,
synTerra

2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Carolinas,LLC SynTerra
r
r; m 4"
ita
\• x ..
jl
S-05 View of seep location from Lake Wylie facing west.
. .•, 0 of r` it f* ;:-
104
Il
k)
�.I�d ,i,
k ;ids,,, ,_'Lir _yr• ' '.mot 1 i�.,�
,. .
r ; 3xA
jAfto
,,,_:t• .
4i 4-� •7y '
-44
S-06 View of seep location facing east,looking towards Lake Wylie.
L,
synTerra

Prr
2018 Annual Seep Report April 2019
Allen Steam Station,Duke Energy Carolinas,LLC SynTerra
, 1
y -",ile • K I(J_r
r l.
4. i -4.4tf, 4 i_
•
S-07 I View of seep location facing east-northeast,towards lake Wylie
< • .....40
A.$
, ,
. _
_. . .
, . .
. .
... - ... , ,
,r
1i
,. !
i
..0_ .-, .
. ...
,-,,, ,.
S-09 I View of dispositioned seep S-09 facing west.
synTerra

ty,DU Allen Steam Station
_.c:V-i;'JC N�iDWR 253 Plant Allen Roao
ENERGY. Belmont, NC 28012
RFGIONAL OF,, serfiche
April 4, 2019
Linda Culpepper, Director
North Carolina Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1616
Subject: Duke Energy Carolinas, LLC
Allen Steam Station
Special Order by Consent
EMC SOC WQ S 17-009
Completion Notification
Dear Ms. Culpepper:
In accordance with the NC Environmental Management Commission Special Order by Consent,
EMC SOC WQ S 17-009, Duke Energy Carolinas, LLC. (Duke) is hereby submitting this
notification that construction of the Dry bottom ash handling conversion project was completed
on March 31, 2019. This notice fulfills our obligation found in the subject Order's Section 2.b.
If you have any questions, please contact Elizabeth Glenn (980) 373-053).
1 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. 1 am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.
Sincerely,
Terry W. Tuck
General Manager II
Fossil/Hydro Operations - Carolinas Coal Generation

Page 2
Cc: Bob Sledge
NC Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Mr. Corey Basinger- Regional Office Supervisor NC DWR
610 East Center Avenue,
Suite 301
Mooresville, NC 28115
SME/FileNet
Shannon Langley— via email
UPS Tracking: Raleigh (LC): 1Z X67 601 24 9315 4735
Mooresville (CB): 1Z X67 601 24 9352 2757
Raleigh (BS): 1Z X67 601 24 9122 8347

WebEOC 8.4 https://www.ncsparta.net/eoc7/controlpanel.aspx
2 ��01a 32 1 P'Ly
EM43 Reporting Co N 6c/ 6q z FF3 3
9 ° '3)-3 OS 3 r\
EM Level: NCEM Edited: Include in Report:
4 Yes Yes
Taken by: Date/Time Reported: Date/Time Occurred:
C Creighton 05/13/2018 20:59:00 05/13/2018 20:40:00
Reported by: Agency: Phone:
NRC USCG 800-424-8802
County: City: Area:
Gaston Belmont 13
Street Address: Zip Code:
Allen Steam Station - 253 Plant Allen Rd
EVENT TYPE
Type: Complaint
Animal Disease Event Type: Bomb Threat Event Type:
Complaint Event Type: Fire Event Type:
Citizen
FNF Event Type: FNF Class:
HazMat Event Type: HazMat Class: HazMat Mode:
Other See Description
Homeland Security Event: Non-FNF Event: Non-FNF Event Type:
Other Event Type: SAR Type:
Water Contamination
Transportation Event Type: Wastewater Event Type:
Weather Event Type: Weather Event Name: WMD Event Type:
State Resource Request
Event Description:
NRC forwarded a citizen complaint in regards to an unknown sheen for an unknown source on Lake
Wylie. Duke Energy has applied booms and have sent water samples for testing.
Follow up call from Duke Energy advises this could possibly be some type of Lake growth that has
happened in the past, they will know more when they get the samples back.
NRC1212036.pdf f k-p/►,k GJ p_ �',,`�9 C Oa/Q 2
x
2 of 2 5/14/2018 8:38 AM

https://reports.ncem.org/WebEOCNCEMReports/EM43.aspx?&datai...
14 4 11 of 1 0 01 4' I Find I Next 1
North Carolina Emergency I EM, P` `,,
Management
EM43 Reporting
20 000 ) 0 '?/
Taken By: Date/Time Reported: Date/Time Occured:
J. Belcher 1/19/2018 5:43:47 PM 1/19/2018 10:50:00 AM
Reported By: Agency: Phone:
Elizabeth Glenn Duke Energy 864-642-8833
County: Gaston City: Belmont Area: 13
Street Address: 253 Plant Allen Rd ZIP Code:
EVENT TYPE
Type: Other 11~C 1/1- C/l,-C
8 ti)-u & 0 K n� �'lli 3 o) 64,)/c-
Other Event Type: Other See Description U "\l n , tj M [7
� Iu 1,
Event Description:
Duke Energy reported release of unknown amount of service water to the ground from broken water line. Clean up
operations conducted. No state resources requested.
Death: 0 Injuries: 0 Evacuation: 0 Radius: 0
Latitude: 00.000000 Longitude: -00.000000
NOTIFICATIONS
AC: Advised
ENV MNGT: Advised
WATER: Advised
Notes:
1749-D.Gee,S. Lewis, DEQ and PHPR emailed-jb
1750-D.Gee ack email-jb
1805-V. Lott ack email-jb
1/22/2018 8:14:46 AM Page 1 of 1
1 of 1 1/22/2018 8:15 AM

777
https://reports.ncem.org/WebEOCNCEMReports/EM43.aspx?&datai...
14 4 11 of 1 0* 0 4 1 — Find I Next 44
"'` 1-3
North ( al olina Emergency ""6 1V1p p `""
D, ':'-' creeddited _ ' "
M: nagement -. _,,,e-t, s�
I;M ;3 Reporting ild
Taken Fly: Date/Time Reported: Date/Time Occured:
'''.stal A.Cavalier 1/15I2018 9:16:39 AM 1/15/2018 8:55:00 AM 77
T.d:+.
Reported By: Agency: Phone:
N R C USCG -800-424-8802
County: Gaston City: Belmont Area: 13
,- Address: 253 PLANT ALLEN IC) ZIP Code:
EVENT TYPE
Type: Ha/Mat
/V0 r f r fiL0 '1 -')
1AZr:+.T Event Type: Other S. e D. :'iotion
HAZMAT Class: Other /Y 0 .1-e IL( v
HAZMAT Mode: Other
Event '.)ascription: ' 4
The r ' C forwarded a report concerning an un% own sheen from an unknown source on Lake Wylie. The release i.' r
was se':ured and cleanup operations were ::on' . cted.This incident is under investigation. .I
� -
Dc:itl : 0 Injuries: 7 Evacuation: 0 Radius: 0
Latitude: 00.000000 Longitude: -00.000000 7
'OTIFICATIONS
it'.:: Advlsec
E'.V ^1NGT: Advised
WATER: Advised
l ntC..
C:1 5-G.Atchley, NC DHHS, and S. Lew ern. led-cc
C'76- -C paged-cc
C 29-G.Atchley-cc ,
C - Cnristyn Fertenbaugh from DEC r'•.;rne call-cc
C1°' '/. Lott ack-cc
1/1 f -,1"' '.. 18:32 AM Page 1 of 1
1 of 1 < .: 1/16/2018 8:18 AM

Collection System SSO 24-Hour Notification
Collection System: Number and Name WQ£S# q "( I
Incident Number from BIMS 20170 I `7c4 ()-
Incident Reviewed (Date):
Incident Action Taken: No Further Action
NOV-2017-DV
DV-2017-
Spill Date fqq 9 /I 7 Time 74, 3 C am/ pm
Reported Date ! / // Time oZ 3 3 am/*
Reported To SWP Staff or EM Staff N1 - C
Reported By t=- Uz4 be+k (7 (-e n Phone (7a) `/ - C y7_ `4(
Address of Spill �r l�n Al f e r
County 6"'4- iv\ City
Cause of Spill spy c,:U ye Ao I 'tvi\ k 0 c Pi/ /o t,J a
Total Estimated Gallons WO Est. Gal to Stream ti U G
Stream LA I:e &J7 /r Fish Kill: Yes("!Number Species
Non-Required Information and other comments relating to SSO incident: -'
Response time minutes Zone Map Quad
--771, cc ri) 6(c ( tic 5 le lc C O- Aa !L-e vv 5;)-e 1,‘
f C C 4, 4- 5 c Inc (C) r y\ Y(.t1�� � ' + r a_ I'�G. -�r Gr/11 5 t A r' e4
1'll,41 C,1 G1(ll C�. InS�' `I 1,P A00, r) 11I0• ►, k (atco�e. /1. ��. �)u .�l �'J� y�� f�•s� �� ) �O
tiP se we i 0(/ Pv' `f ID1,;ocv �Q �h�� �1'5 JC��/i (1C�� � C/\ ,4` r"i /v1-✓�1'l 5 J L,,C' „✓t
„�h �, c•l+c� cv`f� f c1 r cc j. cI}? c9 rj 0 (',..� c nc'� (4 r\`f--U
1) MRO-PWS: Clint Cook or Mark Hahn 1 /)-°,//9 (�/�D = 2l 6,./r‘ verbal contact date/time
om. PWS Em. Cell Phone [phone] '`, } 6' contact date/time
i—7 c.�?r �Js..IN, .y f�1cf 4'(^�T r'S Ce)AelPc+t(3 40 vl,.'t f c I( 61 . n/0 c �t/ +(.!5 5! jh5 0`f
2) DHHS: J `Je t b5N v he 0C) 1 cti5c-I`aiie j(5).
Alexander County- Keith Rowland [phone] contact date/time
All other Counties -Valerie Lott [phone] 9//7 If //c: 20 an contact date/time
**If you are unable to reach Keith or Valerie,
call the 24/7 On Call Number: 1-888-820-0520 contact date/time
Optional DHHS contact(consult with Corey/Andrew before contacting):
Brian Combs [phone] contact date/time

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curpv
North Carolina Emergency Management
\ ..,CCNbniiAYitlN nn.OGH"M,.,/
EM43 Reporting
Taken By: Date/Time Reported: Date/Time Occured:
C Creighton 12/25/2017 2:33:25 PM 12/24/2017 7.30:25 PM
Reported By: Agency: Phone:
Elizabeth Glenn Duke Energy 864-647-8833
County: Gaston City: Belmont Area: 13
Street Address: Duke Steam Station on Plant Allen rd ZIP Code:
EVENT TYPE
Type: Wastewater
Wastewater Event Type: Other
Event Description:
Duke Energy reported a 400 gallon sewage release from a tank due to overflow.Sewage entered Lake Wylie which is a
non drinking water source Clean up operations were conducted,no state resources requested.
Death: 0 Injuries: 0 Evacuation: 0 Radius: 0
Latitude: 00.000000 Longitude: -00.000000
NOTIFICATIONS
Notes:
**No notifications needed**
12/29/2017 8:07:39 AM Page 1 of 1
1 of 1 12/29/2017 8:07 AM

KE Allen Steam Station
Duke Energy
ENERGY® 253 Plant Allen Road
CAROLINAS Belmont,NC 28012
RECEIVED/NCDENRIDWR
January 2, 2018 AN 3 20Us
WOROS
Mr. Wes Bell MOORESVILLE REGIONAL OFFICE
NCDEQ-Mooresville Regional Office
Division of Water Resources
610 East Center Avenue
Suite 301
Mooresville, NC 28115
Subject: Plant Allen
NDPES Permit No. NC0004979
Notification of Wastewater Overflow
Dear Mr. Wes Bell:
In reference to Part II, Section E.6 of NDPES Permit NC0004979, this letter is the 5-day written
notification. On 12/24/17 at approximately 20:30, a construction trailer sanitary holding tank
waste system overflowed. The verbal notification was made on 12/25/17 at 14:27 to the DEQ
Emergency/Weekend Hotline. The following provides details of the event.
On 12/24/17 at approximately 20:30, site operations discovered a holding tank connected to a
construction trailer waste system overflowing. Site personnel responded and immediately
isolated the flow and began initial investigation. Based on this information the assumption was
made a toilet had been running for approximately 58 hours. After considering multiple factors
including distance and route from the holding tank to the station drain, available freeboard in the
tank, secondary containment capacity, absorption by asphalt and surrounding soil, it was
determined a maximum of 483 gallons of wastewater potentially released to Lake Wylie through
Outfall-004.
Immediate Actions:
1) All flows at the trailer were isolated and the water was shut off.
2) Station operations placed signs on the trailer entrance doors that state the water is out of
service, do not operate.
3) Turned off the Lift Station control switch located outside the front of the pump house.
4) Station operations placed white "DANGER DO NOT OPERATE" TAGS to the toilet
shutoff valves.
5) No visible discharge was reported from Outfall 004.
Corrective Actions:
1) Stanley Environmental Services arrived on site on 12/26/17 to pump out the holding tank
and the underground septic tank and to check the associated lift station pump
functionality.
2) Lime was spread on asphalt area covering potential flow path.
3) The toilets in the trailer were taken out of service until the staff returns on 1/3/18 and the
toilet repaired.

This event is currently under evaluation. Appropriate measures will be implemented once the
evaluation is completed to ensure a similar event does not reoccur.
No SSO reporting form is included due to the overflow originating from a temporary domestic
wastewater or septage tank.
This letter is signed by Mr. Brandon Garrison, Superintendent of Operations for Allen Station, in
lieu of Mr. Brent Dueitt, Allen Station Manager. Mr. Dueitt is out of town and unable to sign. Mr.
Garrison has DOA signature authority and documentation paperwork for this signature is
attached.
If you have any questions associated with this report, please contact Elizabeth Glenn at 980-
373-0530.
Sincerely,
7.---;1441‘'‘/Pda4/u4o,.
Brandon Garrison
Superintendent of Operations
CC: Ori Tuvia
Brent Dueitt
Randy Gantt
Kristi McCall
UPS Tracking: 1Z X67 601 24 9985 7779

��S RECEIVED/NCDENR/DWR
iOrrGy
JA N 9 2018 Allen Steam Station
253 Plant Allen Rd.
WQROS Belmont,NC 28012
MOORESVILLE REGIONAL OFFICE 704 829-2587
January 3, 201E
WPCSOCC
1618 Mail Service Center
Raleigh,North Carolina 27699-1618
Dear Madam/Sir:
Please find enclosed the original Water Pollution Control System Operator Designation Forms for Duke Energy LLC, Plant
Allen Steam Station, 253 Plant Allen Rd.,Belmont,N.C.28012. Permit number is NC0004979. This establishes the current ORC
and Backup ORCs.
Should you have any,questions regarding this submittal,please contact Michael R. Gantt at 704-829-2587.
Sincerely,
jdfit—
Michael R.Gantt
Lead Environmental Professional
Duke Energy LLC
Plant Allen Steam Station
253 Plant Allen Rd.
Belmont,N.C. 28102
704-829-2587
UPS Tracking:
Raleigh: 1Z X67 601 24 9070 9221
Mooresville: 1Z X67 601 24 9094 1210

WA I LK POLLUTION CONTROL SYSTEM OPERATOR DESIGNiNlpCSOCC)
NCAC 15A 8G .0201
JAN 9 2018
Press TAB to enter information
Permittee Owner/Officer Name: Duke Energy Carolinas, LLC WORos
MOORESVILLE REGIONAL OFFI[:F
Mailing Address: 253 Plant Allen Rd.
Phone: [phone]
City: Belmont State: NC Zip: 28012
Email Address: [e-mail]
Signature: &A/Lg.— 'irtA.A.,j-- Date: I-3, 020 /k`
Facility Name: Duke Energy- Plant Allen Steam Station
Permit# NC0004979
County: Gaston
YOU MUST SUBMIT A SEPARATE FORM FOR EACH TYPE AND CLASSIFICATION OF SYSTEM:
Facility Type: PC
Facility Grade: II
I OPERATOR IN RESPONSIBLE CH4 4iE MSC)
Print Full Name: Michael R. Gantt
Work Phone: [phone]
Certificate Type: PC Certificate Grade: II
Certificate#: 1004850
Email Address: [e-mail]
Signature: `�
Effective Date: /— I_ Lc It
"I certify that I agree to my designation as the Operator in Responsible Charge for the facility noted. I understand and will abide by the
rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
I BI C PP.P C
Print Full Name: Donald L. Scruggs I
Work Phone:[phone]
Certificate Type: PC Certificate Grade:
Certificate#:27892
Email Address: [e-mail]
Signature: /
Effective Date: _3_ a �'��
"I certify that I agree to my designation as a Back-up Operator /ponsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 1SA NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Mail,fax or email WPCSOCC, 1618 Mail Service Center,
Fax:[phone];<s,-, L; >: ;;:
. .�,7v
ORIGINAL to: Raleigh,NC 27699-1618
Mail or Fax Asheville Fayetteville
a COPY to: 2090 US Hwy70 Mooresville Raleigh
225 Green St.,Suite 714 610 E.Center Ave.,Suite 301 3800 Barrett Dr.
Swannanoa,NC 28778 Fayetteville,NC 28301-5043 Mooresville,NC 28115
486-0707 Raleigh,-5 27609
Fax:[phone] Fax:910-
Phone:[phone] Fax:[phone] Fax:[phone]
Phone:[phone] Phone:[phone] Phone:[phone]
Washington Wilmington Winston-Salem
943 Washington Sq.Mail 127 Cardinal Dr. 45 W.Hanes Mall Rd.
Washington,NC 27889 Wilmington,NC 28405-2845 Winston-Salem,NC 27105
Fax:[phone] Fax [phone] Fax:[phone]
Phone:[phone] Phone:[phone] Phone:[phone]
Revised 42016

WPCSOCC Operator Designation Form(continued)
Page
Facility Name: Duke Energy-Plant Allen Steam Station
Permit#: NC0004979
BACKUP ORC
Print Full Name: Robbin M. Jolly _
Work Phone:[phone]
Certificate Type: PC Certificate Grade: II
Certificate#: 1005232
Email Address: robbin.jolly@dike-energ .com
Signature: �
Effective Date: /—3-010 y
"1 certify that I agree to my designa ' as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BAM. MP ORC
Print Full Name: Brandon R. Shearer
Work Phone:[phone]
Certificate Type: PC Certificate Grade:
Certificate#: 1005082
Email Address: [e-mail]
Signature:
Effective Date: /— 3-/
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BAUM P ORC
Print Full Name:
Work Phone:
Certificate Type: Select Certificate Grade: Select
Certificate#:
Email Address:
Signature:
Effective Date:
certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
1 NMI!PAC
Print Full Name:
Work Phone:
Certificate Type: Select Certificate Grade: Select
Certificate#:
Email Address:
Signature:
"I certify that I agree to mydesignationEffective Date:
os a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibibties of the ORC as set forth in 15A NCAC 08G.0204 and foiling to do so con result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Revised 4/2016

RECEIVED/NCDENRIDWR
WATER POLLUTION CONTROL SYSTEM OPERATOR DESIGNATION)FORM ¶\ CSOCC)
NCAC 15A 8G .0201 II``�I LL O 1
Press TAB to enter information W!REGS
MOORESVILLE REGIONAL OFFICE
Permittee Owner/Officer Name: Duke Energy Carolinas, LLC
Mailing Address: 253 Plant Allen Rd. Phone: [phone]
City: Belmont State: NC Zip: 28012
Email Address: [e-mail]
Signature: �.�- �� Date: /- 3 - o106
Facility Name: Duke Energy- Plant Allen Steam Station Permit it NC0004979
County: Gaston
YOU MUST SUBMIT A SEPARATE FORM FOR EACH TYPE AND CLASSIFICATION OF SYSTEM:
Facility Type: WW
Facility Grade: II
OPERATOR IN RESPONSIBLE CHARGE(ORC)
Print Full Name: Michael R. Gantt Work Phone: [phone]
Certificate Type: WW Certificate Grade: II Certificate U: 5969
Email Address: [e-mail]
Signature: 2fj - Effective Date: / ,. - ) p
"I certify that I agree to my designation as the Operator in Responsible Charge for the facility noted. I understand and will abide by the
rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BACKUP ORC
Print Full Name: Donald L. Scruggs Work Phone:[phone]
Certificate Type: WW Certificate Grade: II Certificate it:10696
Email Address: [e-mail]
Signature: l)OLb% t .(* ' Effective Date: / 3 / F-
"I certify that I agree to my designation as a Back-up Ope ator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC O8G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Mail,fax or email WPCSOCC,1618 Mail Service Center, Fax:[phone] Email:a
ORIGINAL to: Raleigh,NC 27699-1618
Mail or Fax Asheville Fayetteville Mooresville Raleigh
a COPY to: 2090 US Hwy 70 225 Green St.,Suite 714 610 E.Center Ave.,Suite 301 3800 Barrett Dr.
Swannanoa,NC 28778 Fayetteville,NC 28301-5043 Mooresville,NC 28115 Raleigh,NC 27609
Fax:[phone] Fax:[phone] Fax:[phone] Fax:[phone]
Phone:[phone] Phone:[phone] Phone:[phone] Phone:[phone]
Washington Wilmington Winston-Salem
943 Washington Sq.Mall 127 Cardinal Dr. 45 W.Hanes Mall Rd.
Washington,NC 27889 Wilmington,NC 28405-2845 Winston-Salem,NC 27105
Fax:[phone] Fax:[phone] Fax:[phone]
Phone:[phone] Phone:[phone] Phone:[phone] Rlevised402016

WPCSOCC Operator Designation Form(continued) Page 2
Facility Name: Duke Energy-Plant Allen Steam Station Permit#: NC0004979
BACKUP ORC
Print Full Name: Robbin M. Jolly Work Phone:[phone]
Certificate Type: WW Certificate Grade: II Certificate#:6439
Email Address: [e-mail]
Signature: / s_,(,� Effective Date: /-3- 20/(
"I certify that I agree to my designa ' as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BACKUP ORC
Print Full Name: Brandon R. Shearer Work Phone:[phone]
Certificate Type: WW Certificate Grade: I Certificate#:1005605
Email Address: [e-mail]
Signature: —_� 1 Effective Date: /— 3-/6 -
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BACKUP ORC
Print Full Name: Work Phone:
Certificate Type: Select Certificate Grade: Select Certificate It:
Email Address:
Signature: Effective Date:
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BACKUP ORC
Print Full Name: Work Phone:
Certificate Type: Select Certificate Grade: Select Certificate#:
Email Address:
Signature: Effective Date:
"1 certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Revised4/2016

Paul Draovitch
DUKEsenior Vice President
NL, ENERGY® Environmental,Health&Safety
526 S.Church Street
Mail Code.'EC3XP
Charlotte,NC 28202
(980)-373-0408
August 4,2017 l .
;)Ft.:CE-
Mr.Jeff Poupart,Section Chief
NC Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Owner Affiliation and Facility Contacts for North Carolina NPDES Correspondence
Duke Energy NPDES Permitted Facilities
Dear Mr. Poupart:
As discussed with you by Richard Baker and Shannon Langley on July 5, 2017,Duke Energy has recently
noted an increased number of documents and correspondence from your agency being directed to the
attention of incorrect staff persons for our NPDES permitted facilities. A few recent examples include
the annual NPDES inspection report for the Mayo Steam Station and a Notice of Violation for the Cape
Fear plant being sent to the Vice President of Harris Nuclear Plant; as well as correspondence for the
Allen Steam Station sent to the South Carolina Director of Environmental Policy. In each case,this has
led to delays in the permitted facility receiving information and impacts our ability to provide time
sensitive responses to the Department of Environmental Quality(DEQ).
Duke staff have discussed this situation with DEQ staff in the central and various regional offices. Based
on our conversations and a review of information captured in your BIMS system,we believe the best
way to address this is with the following included information: •
1. A single name/ownership change form to request that the"owner affiliation"for entities Duke
Energy Progress, LLC(DEP)and Duke Energy Carolinas, LLC(DEC) be updated with my contact
information. There appear to be numerous obsolete contacts listed as"owner contact persons"
in your BIMS database-that field can be updated to include my name and the others removed.
2. The "permit billing contact person"should be updated for all facilities to name Cynthia Winston,
Manager,410 S.Wilmington Street, NCRH15, Raleigh NC 27601. She can be reached at
[phone] and [e-mail].
3. The"facility contact person"for each facility should reflect the Station Manager at the site. A
list of current Station Managers for all DEP and DEC facilities is attached to this correspondence.
4. The fields for"permit contact person" and "persons with signatory authority" have been
recently updated as part of the e-dmr registration process and appear accurate as of this time.
Based on this information, I would envision that general correspondence applicable to more than one
Duke Energy facility,such as groundwater information or other programmatic issues, should be directed

Mr.Jeff Poupart
August 4, 2017
to my attention,while station specific communication should be directed to the Station Manager for the
site. Duke Energy will continue to routinely update the DEQ in a timely manner when facility contacts
change. If you think it would be helpful,we would be available to meet with your staff to discuss the
best way to assure accurate delivery of correspondence. We are providing copies of this letter to each
of the regional office supervisors responsible for NPDES permit oversight.
If there are any questions relating to this request please contact Anne Pifer at(980)-373-1609 or
at [e-mail].
Sincer y,
r"-- ®ems
P I Draovitch
Senior Vice President
Duke Energy Environment Health and Safety
Attachments
Cc: Bob Sledge/NCDEQ Jim Gregson/NC DEQ WiRO
1617 Mail Service Center 127 Cardinal Drive Ext.
Raleigh, NC 27699-1617 Wilmington, NC 28405
Landon Davidson/NCDEQ ARO Sherri Knight/NCDEQ WSRO
2090 US Highway 70 450 West Hanes Mill Rd,Suite 300
Swannanoa, NC 28778 Winston-Salem, NC 27105
David May/NC DEQ WaRO Trent Allen/NC DEQ FRO
943 Washington Square Mall 225 Green Street,Suite 714
Washington, NC 27889 Fayetteville, NC 28301-5095
Corey Basinger/NC DEQ MRO Danny Smith/NC DEQ RRO
610 East Center Ave,Suite 301 1628 Mail Service Center
Mooresville, NC 28115 Raleigh, NC 27699-1628
Bethany Georgoulias
Stormwater Program, NCDEQ/DEMLR
1612 Mail Service Center, Raleigh, NC 27699-1612
Anne Pifer/Duke Energy
FileNet

FACILITY CONTACTS(STATION MANAGERS)FOR DUKE ENERGY FACILITIES-AUGUST 4,2017
NPDES Stormwater NPDES Wastewater General
Owner Name Facility Name Station Type Permit Number Permit Number Permit Facility Contact Facility Contact Address
Number
Duke Energy Carolinas,LLC Allen Coal NCS000546 NC0004979 Brent Dueitt,Station Manager 253 PLANT ALLEN RD,BELMONT NC 28012
Duke Energy Progress,LLC Asheville Coal/CT NC-5000575 NC0000396 Garry A.Whisnant,Station Manager 200 CP&L DRIVE,ASHEVILLE NC 28704
Duke Energy Carolinas,LLC Bear Creek Hydro NCG500124 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Belews Creek Coal NCS000573 NC0024406 Regina)D.Anderson,Station Manager 3195 PINE HALL ROAD,BELEWS CREEK NC 27009
Duke Energy Progress,LLC Blewett Falls Hydro NCG500190 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Carolinas,LLC Bridgewater Hydro NCG500102 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Progress,LLC Brunswick Nuclear NC5000590 NC0007064 William R.Gideon,Site VP 8470 RIVER RD.SE,SOUTHPORT NC 28461
Duke Energy Carolinas,LLC Bryson Hydro NCG500129 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Buck Coal/CT NC0004774 Henry A.Botkins,Station Manager 1385 DUKEVILLE ROAD,SAUSBURY NC 28146
Duke Energy Progress,LLC Cape Fear Coal/CT NC5000574 NC0003433 Issa J.2arzar,Station Manager 411 FAYETTEVILEL STREET,RALEIGH NC 27601
Duke Energy Carolinas,LLC Cedar Cliff Hydro NCG500125 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Oiffside Coal NC5000571 NC0005088 Dave Barnhardt,Station Manager 573 DUKE POWE ROAD,MOORESBORO NC 28114
Duke Energy Carolinas,LLC Cowans Ford Hydro NCG500139 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Carolinas,LLC Dan River Coal/CT NC5000572 NC0003468 Lawrence D.Sparks,Station Manager 864 S EDGEWOOD RD,EDEN NC 27288
Duke Energy Progress,LLC Harris/HEEC Nuclear NC0039586 Benjamin C.Waidrep,Site VP 400 5 TRYON ST,CHARLOTTE NC 28202
Duke Energy Progress,LLC Lee/Wayne County Coal/CC NC0003417 Jeffery D.Hines,Station Manager 1199 BLACK JACK CHURCH RD,GOLDSBORO NC 27530
Duke Energy Carolinas,LLC Lincoln CT NC0080781 Henry A.Botkins,Station Manager 1385 DUKEVILLE ROAD,SAUSBURY NC 28146
Duke Energy Carolinas,LLC Lookout Shoals Hydro NCG500120 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Progress,LLC Marshall Hydro NCG500591 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
_Duke Energy Carolinas,LLC Marshall Coal NC5000548 NC0004987 Rick R.Roper,Station Manager 8320 EAST NC HWY 150,TERRELL NC28682
Duke Energy Progress,LLC Mayo Coal NCS000580 NC0038377 Tom Copolo,Station Manager 10660 BOSTON ROAD,ROXBORO NC 27574
Duke Energy Carolinas,LLC McGuire Nuclear NCS000020 NC0024392 Steven D.Capps,Site VP 12700 HAGERS FERRY RD,HUNTERSVILLE NC 28087
Duke Energy Carolinas,LLC Mission Hydra NCG500128 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Mountain Island Hydro NCG500131 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Carolinas,LLC Nantahala Hydro NCG500136 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Oxford Hydro NCG500119 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Carolinas,LLC Rhodhiss Hydro NCG500108 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Progress,LLC Richmond County CC NCG500594 Thomas Hanes,Station Manager 198 ENERGY WAY,HAMLET NC 28345
Duke Energy Carolinas,LLC Riverbend Coal/CT NCS000549 NC0004961 Tim Hill,Station Manager 400 S TRYON ST,CHARLOTTE NC 28202
Duke Energy Carolinas,LLC Rockingham CT NC0086665 Lawrence D.Sparks,Station Manager 864 S EDGEWOOD RD,EDEN NC 27288
Duke Energy Progress,LLC Roxboro Coal NC5000581 NC0003425 Jason V.Haynes,Station Manager 1700 DUNNAWAY ROAD,SEMORA NC 27343
Duke Energy Progress,LLC Sutton Coal/CT NC0001422 Jesse E.Huntley,Station Manager 801 SUTTON STEAM PLANT RD,WILMINGTON NC 28401
Duke Energy Carolinas,LLC Tennessee Creek Hydro NCG500123 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Thorpe Hydro NCG500127 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Progress,LLC Tillery Hydro NCG500189 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Carolinas,LLC Tuskasegee Hydro NCG500126 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Tuxedo Hydro NCG500110 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Progress,LLC Walters Hydro NCG500188 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Progress,LLC Weatherspoon Coal/CT NCS000589 NC0005363 _Thomas Hanes,Station Manager 198 ENERGY WAY,HAMLET NC 28345

Iriz ROY COOPER
.j,„:;,,... .
MICHAEL S. REGAN
S. JAY ZIMMERMAN
PERMIT NAME/OWNERSHIP CHANGE FORM
I. CURRENT PERMIT INFORMATION:
Permit Number: NCOO / / / / or NCG5 / / / /
All Duke Energy Progress LLC and Duke Energy Carolinas LLC
1. Facility Name:
II. NEW OWNER/NAME INFORMATION:
1. This request for a name change is a result of:
a. Change in ownership of property/company
b. Name change only
X c. Other(please explain):Owner Affiliation contact person
2. New owner's name(name to be put on permit):
No change to permit holder
3. New owner's or signing official's name and title: Paul Draovitch, P.E.
(Person legally responsible for permit)
Senior Vice President, EH&S
(Title)
4. Mailing address:526 South Church Street -EC3XP City: Charlotte
State: NC Zip Code:28202 Phone: ( )980-373-0408
E-mail address: [e-mail]
THIS APPLICATION PACKAGE WILL NOT BE ACCEPTED BY THE DIVISION UNLESS ALL OF THE
APPLICABLE ITEMS LISTED BELOW ARE INCLUDED WITH THE SUBMITTAL.
REQUIRED ITEMS:
1. This completed application form
2. Legal documentation of the transfer of ownership (such as a property deed, articles of
incorporation, or sales agreement)
[see reverse side of this page for signature requirements]
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh,NC 27699-1617
919 807 6300 919-807-6389 FAX
hugs://deq.nc.gov/alwut/divisions/water-resources/water-resources-perm its/wastewater-branch/npdes-wastewater-perm its

NPDES Name&Ownership Change
Page 2 of 2
Applicant's Certification:
Paul Draovitch , attest that this application for a
name/ownership change has been reviewed and is accurate and complete to the best of my
knowledge. I understand that if all required parts of this application are not completed and that
if all required sus sorting information and attachments are not included, this application
package wil se re ,\rne as omplete.
1
nn �o Signature: \G.�\ `" ' Date: 2-IC"I
THE COMPLETED APPLICATION PACKAGE, INCLUDING ALL SUPPORTING
INFORMATION & MATERIALS, SHOULD BE SENT TO THE FOLLOWING ADDDRESS:
NC DEQ / DWR / NPDES
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Version 7/2016

DUKE
ENERGY
Allen Steam Station
253 Plant Allen Rd.
Belmont, NC 28012
704 829-2587
RECEIVED/NCDENR/DWR
JUL 14 2017
WORDS
MOORESVILLE REGIONAL OFFICE
July 13, 2017
WPCSOCC
1618 Mail Service Center
Raleigh, North Carolina 27699-1618
Dear Madam/Sir:
Please.find enclosed the original Water Pollution Control System Operator Designation Forms for Duke Energy LLC, Plant
Allen Steam Station, 253 Plant Allen Rd., Belmont,N.C.28012. Permit number is NC0004979. This establishes the current ORC
and Backup ORCs for both the PC-2 and WW-2 designations.
Should you have any questions regarding this submittal,please contact Michael R. Gantt at 704-829-2587.
Sincerely,
24/87—
Michael R. Gantt
Lead Environmental Professional
Duke Energy LLC
Plant Allen Steam Station
253 Plant Allen Rd.
Belmont,N.C. 28102
704-829-2587
UPS Tracking:
Raleigh: 1Z X67 601 24 9656 2431
Mooresville: 1Z X67 601 24 9900 3048

RECEIVED/NCDENR/DWR
WATER POLLUTION CONTROL SYSTEM OPERATOR DESIGNATION FORM (W�PCS.00C)
NCAC 1SA 8G .0201
WQROS
Press TAB to enter information MOORESVILLE REGIONAL OFFICE
Permittee Owner/Officer Name: Duke Energy Carolinas, LLC
Mailing Address: 253 Plant Allen Rd. Phone: [phone]
City: Belmont State: NC Zip: 28012
Email Address: [e-mail]
Signature: Date: 4 7— /J.-a2,0 17
Facility Name: Duke Energy- Plant Allen Steam Station Permit# NC0004979
County: Gaston
YOU MUST SUBMIT A SEPARATE FORM FOR EACH TYPE AND CLASSIFICATION OF SYSTEM:
Facility Type: PC
Facility Grade: II
OQER.,IqR IN RESPONSLE.J E CHARGE
Print Full Name: Michael R. Gantt Work Phone: [phone]
Certificate Type: PC Certificate Grade: II Certificate#: 1004850
Email Address: michael.gantt duke-energy.com
Signature: (/f , �V4,17— Effective Date: 1 i‘r
"1 certify that I agree to my designation as the Operator in Responsible Charge for the facility noted. I understand and ill abide by the
rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BACKUP ORC
Print Full Name: Donald L. Scruggs Work Phone:[phone]
Certificate Type: PC Certificate Grade: I Certificate#:27892
Email Address: [e-mail]
Signature: _ �r.,j Effective Date:
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Mail,fax or email WPCSOCC,1618 Mail Service Center, Fax:[phone]
ORIGINAL to: Raleigh,NC 27699-1618
Mail or Fax Asheville Fayetteville Mooresville Raleigh
a COPY to: 2090 US Hwy 70 225 Green St.,Suite 714 610 E.Center Ave.,Suite 301 3800 Barrett Dr.
Swannanoa,NC 28778 Fayetteville,NC 28301-5043 Mooresville,NC 28115 Raleigh,NC 27609
Fax:[phone] Fax:[phone] Fax:[phone] Fax:[phone]
Phone:[phone] Phone:[phone] Phone:[phone] Phone:[phone]
Washington Wilmington Winston-Salem
943 Washington Sq.Mall 127 Cardinal Dr. 45 W.Hanes Mall Rd.
Washington,NC 27889 Wilmington,NC 28405-2845 Winston-Salem,NC 27105
Fax:[phone] Fax:[phone] Fax:[phone]
Phone:[phone] Phone:[phone] Phone:[phone] Rerised412016

WPCSOCC Operator Designation Form(continued) Page 2
Facility Name: Duke Energy- Plant Allen Steam Station Permit#: NC0004979
BACKUP ORC
Print Full Name: Robbin M. Jolly Work Phone:[phone]
Certificate Type: PC Certificate Grade: I
Certificate#:27876
Email Address: robbin.j [e-mail]
Signature: Effective Date: 7 13l17
"I certify that I agree to my designati n as a Back-up Operator in Responsible Charge for the facility noted. l and stand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BACKUP oflc
Print Full Name: Work Phone:
Certificate Type: Select Certificate Grade: Select Certificate#:
Email Address:
Signature: Effective Date:
"1 certify that i agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
RAMP ORC
Print Full Name: Work Phone:
Certificate Type: Select Certificate Grade: Select Certificate#:
Email Address:
Signature: Effective Date:
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. i understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BACKUP ORC
Print Full Name: Work Phone:
Certificate Type: Select Certificate Grade: Select Certificate#:
Email Address:
Signature: _ Effective Date:
certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Revised 4/2016

RECEIVEDINCDENRIDWR
WATER POLLUTION CONTROL SYSTEM OPERATOR DESIGNATION FORM (WP.CSC CC)2017
NCAC 15A 8G .0201
Press TAB to enter information WQROS
MOORESVILLE REGIONAL OFFICE
Permittee Owner/Officer Name: Duke Energy Carolinas, LLC
Mailing Address: 253 Plant Allen Rd. Phone: [phone]
City: Belmont State: NC Zip: 28012
Email Address: [e-mail]
Signature: 6Date: Q 7- /' n
Facility Name: Duke Energy- Plant Allen Steam Station Permit# NC0004979
County: Gaston
YOU MUST SUBMIT A SEPARATE FORM FOR EACH TYPE AND CLASSIFICATION OF SYSTEM:
Facility Type: WW
Facility Grade: II
OPERATOR IN RESPONSIBLE CHARGE(ORC)
Print Full Name: Michael R. Gantt Work Phone: [phone]
Certificate Type: WW Certificate Grade: II Certificate#: 5969
Email Address: [e-mail]
Signature: �_..� /< Effective Date: 7
"I certify that I agree to my designation as the Operator in Responsible Charge for the facility noted. I understand and will abide by the
rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BACKUP ORC
C
Print Full Name: Donald L. Scruggs Work Phone:[phone]
Certificate Type: WVV Certificate Grade: II Certificate#:10696
Email Address: [e-mail]
Signature: � � Effective Date: ? /pi]2
"I certifythat I agree todesignation ✓9my g anon as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Mail,fax or email WPCSOCC,1618 Mail Service Center, Fax:[phone]
ORIGINAL to: Raleigh,NC 27699-1618
Mail or Fax Asheville Fayetteville Mooresville Raleigh
a COPY to: 2090 US Hwy 70 225 Green St.,Suite 714 610 E.Center Ave.,Suite 301 3800 Barrett Dr.
Swannanoa,NC 28778 Fayetteville,NC 28301-5043 Mooresville,NC 28115 Raleigh,NC 27609
Fax:[phone] Fax:[phone] Fax:[phone] Fax:[phone]
Phone:[phone] Phone:[phone] Phone:[phone] Phone:[phone]
Washington Wilmington Winston-Salem
943 Washington Sq.Mall 127 Cardinal Dr. 45 W.Hanes Mall Rd.
Washington,NC 27889 Wilmington,NC 28405-2845 Winston-Salem,NC 27105
Fax:[phone] Fax:[phone] Fax:[phone]
Phone:[phone] Phone:[phone] Phone:[phone] Rev; 4/2016

WPCSOCC Operator Designation Form(continued) Page 2
Facility Name: Duke Energy- Plant Allen Steam Station Permit#: NC0004979
BACKUP ORC
Print Full Name: Robbin M. Jolly Work Phone:[phone]
Certificate Type: WW Certificate Grade: 11 Certificate#:6439
Email Address: [e-mail]
Signature: .,_ I ' Effective Date: 7 p
"I certify that/agree to my designation •"1:ack-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
B44c wP OFtC
Print Full Name: Work Phone:
Certificate Type: Select Certificate Grade: Select Certificate#:
Email Address:
Signature: Effective Date:
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15.4 NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BAacKUP ORC
Print Full Name: Work Phone:
Certificate Type: Select Certificate Grade: Select Certificate#:
Email Address:
Signature: Effective Date:
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BAP OK
Print Full Name: Work Phone:
Certificate Type: Select Certificate Grade: Select Certificate#:
Email Address:
Signature: Effective Date:
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G.0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Revised 4/2016

Allen Steam Station
11111110
prifik,
DUKERFr FI1/ED 253 Plant Allen Road
Belmont,NC 28012
''' ENERGY. APR 2 5 2017 7043824761
704 3826240 fax
DWR SECTION
April 18, 2017 RECEIVEDINCDENR/DWR
MAY - 1 2017
North Carolina Department of Environmental Quality
Division of Water Resources WQROS
MOORESVILLE REGIONAL OFFICE
Information Processing Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: Duke Energy Carolinas, LLC.—Allen Steam Station
March 2017 Groundwater Monitoring Sampling and Analysis Results
Duke Energy Carolinas, LLC. (DEC)sampled thirteen groundwater monitoring wells at the Allen Steam
Station (NPDES Permit#NC0004979) on March 7, 2017. Attached are two copies of the results on DEQ
approved electronic version of Form GW-59CCR.
As required by the GW-59CCR form, parameters exceeding the generic standards published at 15A NCAC
02L.0202(g-h) have been bolded. However, per 15A NCAC 02L.0202(b), where naturally occurring
substances exceed the generic standards, the appropriate 2L standard shall be the naturally occurring
concentration as determined by the Director. All values reported on the attached reports are
dependent on the accuracy of approved analytical methods used to measure parameters.
Should you have questions regarding this report, please contact Sean DeNeale at [phone].
I certify, under penalty of law, that this document and all attachments were prepared under my direction
.46 or supervision in accordance with a system designed to assure thatqualified properly '1
P Y g personnelP P Y gather
and evaluate the information submitted. Based on my inquiry of the person or persons who manage the I
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.
Sincerely,
P. Brent Dueitt
Allen Steam Station
General Manager II Carolinas West

Duke Cc: Mr. Ed Sullivan—EC13K
Mr.Sean DeNeale—EC13K
Mr. Randy Gantt—Allen Steam Station
Attachments
r.
•
•
IF'
F.rr
r
•
•
•
•
•
6:.
�,1fa

„, DUKE 253 Plant Allen Rd
NIC `” ENERGY. Belmont NC 28012
704 829-2400
704 806 2011
Brent Dueitt©duke energy con)
Sep. 28, 2016 RECEIVED/NCDENR/DWR
Mr. Tom Belnick IAN 3 '11
Division of Water Resources
WQ Permitting Section - NPDES WQROS
1617 Mail Service Center
MOORESVILLE REGIONAL OFFICE
Raleigh, NC 27699-1617
Subject: Delegations of authority for Duke Energy Carolinas, LLC Allen Steam Station NPDES
Correspondence
Dear Mr. Belnick:
Allen Steam Station submits this correspondence to update the duly authorized representatives
("Delegated Authorities")for Allen Steam Station.
Please note that Matt Farabaugh - Superintendent Operations should be removed as a duly
authorized representative for Allen and Brandon R. Garrison—Superintendent of Operations
and Kristi C. McCall—Superintendent of Maintenance/Tech Team Manager should be added as
my delegated authorities to sign NPDES-related correspondence. Shannon Todd shall remain
as a delegated authority for Allen Steam Station.
Do not hesitate to contact Randy Gantt at 704 829-2587 or Michael.GanttCa?duke-energy.corn if
you have questions or need additional information.
Sincerely,
.S.j—AkAdCe—
Brent Dueitt
Plant Manager
CC: Randy Gantt
Brandon Garrison
Kristi McCall
Melanie Gardner

GROUNDWATER QUALITY MONITORING DEPARTMENT OF ENVIRONMENTALQUAUTY
COMPLIANCE REPORT FORM and• DIVISION OF WATER QUALITY-INFORMATION PROCESSING UNIT
--. ' 1617 MAIL SERVICE CENTER,RALEIGH,NC 27699-1617 Phone:[phone]
Ill
FACILITY INFORMATION Please Print Clearly or Type
Facility Name: Allen Steam Station Permit Type: NPDES Expiration Date: 5/31/2015
Permit Name(if different): Duke Energy Carolinas,LLC PERMIT Number: NC0004979
Facility Address: 253 Piant Allen Road
(Street) TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
Belmont I NC I 28012 I County Gaston
(City) (State) (Zip)
Contact Person: Sean DeNeaie Telephone# I 704-382-4761
Well Location/Site Name: Allen Ash Basin No.of wells to be sampled: I 13
(from Permit)
Well ID Number(From Permit)
Units AB-1R AB-45 AB-4D AB-11D AB-12S AB-12D AB-135 AB-13D AB-14D AB-95* AB-9D* AB-10S* AB-10D* MW- MW- MW- MW- MW-
Well Depth [ft below land surface] ft 70.89 22.38 49.99 20.53 23.58 96.53 21.97 72.20 29.45 21.01 115.23 18.41 62.44
Measuring Point(toc)[ft above land surface] ft 2.29 2.52 2.19 2 68 2.05 2.04 2.74 2.65 2.44 2.19 2.35 2.44 2.56
Well Diameter in 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
Screen Top [ft below land surface] ft 60.89 7.38 44.99 15.53 8.58 91.53 6.97 67.20 24.45 6.01 110.23 3.41 57.44
Screen Bottom [ft below land surface] ft 70.89 22.38 49.99 20.53 23.58 96.53 21.97 72.20 29.45 21.01 115.23 18.41 62.44
Relative Measuring Point Elevation ft 675.86 650.46 649.17 618.07 651.69 651.75 648.72 648.54 641.80 582.73 582.72 575.05 574.97
58(t1 r,r tTa • ' k t 1r�.r-rt.f S: . .. . . . . ....
CHECK IF DRY WELL AT TIME OF SAMPLING 0 oRy ❑DRY ❑ DRY ❑ DRY ❑ DRy 0 oar �❑ DRY d DRY [] DRY ❑ DRY ❑ DRY ❑DRY n DRY ❑ DRY D DRY ❑ DRY ❑ DRY ❑ DRY
i 15A-2L Units AB-1R AB-4S AB-4D AB-11D AB-125 AB-12D AB-13S AB-13D AB-14D AB-9S' AB-9D* A13-10S' AB-10D* MW- MW- MW- MW- MW-
Sample Date 03/07/2017 03/07/2017 03/07/2017 03/07/2017 03/07/2017 03/07/2017 03/07/2017 03/07/2017 03/07/2017 03/07/2017 03/07/2017 03/07/2017 03/07/2017
Volume of Water pumped/bailed gal 1.40 5.50 15.65 4.05_ 5.05 28.30 7.75 0.85 8.10 5.75 2.30 3.15 5.90
Temperature(00010) deg.C 16.2 16.4 16.3 14.9 15.4 15.7 16.8 17.0 16.8 18.2 18.1 16.1 16.1
Odor(00085) None None None None None None None None None None None None None
Appearance Normal Normal Normal Normal Normal Normal Normal Turbid_ Normal Normal Normal Normal Normal
Turbidity(82078) NTU 1.65 10.9 1.98 2.39 9.7 2.56 1.98 80 15.7 8.48 3.29 2.28 8.01
Dissolved Oxygen(00300) mg/L 8.02 1.02 3.8 0 2.43 5 1 2.1_ 2.97 0 0 0 0
Oxidation Reduction Potential(00090) mV 357 402 531 524 561 522 390 321 537 183 273 260 272
Specific Cond-field(00094) umhos/cm 633.8 140.6 131.8_ 119.1_ 25.8 166.3 108.9 147.7 155.2 232.6 262.9 192.2 162.6
Water Level[ft below measuring pt.](82546) ft 54.26 11.02 9.83_ 6.94 12.56_ 11.94 9.75_ 9.78 14.56 11.53 13.43 8.03 8.04
pH-field(00400) 6.5-8.5 SU 6.2 6.0 6.0 5.9 5.0 6.41 5.6 6.2 5.3 6.3 6.7 6.1 6.2
Laboratory Name Duke Energy Analytical Laboratory Certification# Samples for metals were collected unfiltered: 0' Yes 0 No
Sample Analysis Date March 8-16,2017 NC DENR#248 and field acidified: D Yes 0 No
IMAC' 15A-2L Units AB-1R AB-45 AB-4D AB-11D AB-12S AB-12D AB-13S AB-13D AB-14D AB-9S* AB-9D* AB-10S* AB-10D* MW- MW- MW- MW- MW-
TDS-Total Diss.Solids(70300) -- 500 mg/I 460 73 110 93_ 26 120 89 120 100 110 190 110 150
Cl-Chloride(00940) -- 250 mg/I 1.1 4.9 5.7 6 3.1 5.2 11 11 9.7 9.4 8 15 7.8
As-Arsenic(01002) --- 10 ug/I <1 <1 <1 <1 <1 <1 <1 <i <i <1 <1 <1 <1
SO4-Sulfate(00945) -- 250 mg/I 270_ 13 3.1 0.41 <0.1 5.3 1.1 0.57 29 37 47 19 25
Nitrate(NO3)as N(00620) --- 10 mg/I 0.13 1.4 2.4 0.05 0.08 2.3 2.4 2.4 2.9 <0.023 0.05 0.05 <0.023
Cd-Cadmium(01027) --- 2 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1, <1 <1 <1
Cr-Chromium(01034) --- 10 ug/I 5 <5 6 <5 <5 <5 <5 6 <5 <5 <5 <5 <5
Cu-Copper(01042) --- 1 mg/I <0.005 <0.005 0.015 <0.005 <0.005 <0.005 <0.005 0.012 0.056 <0.005 <0.005 <0.005 <0.005
Fe-Iron(01045) --- 300 ug/I 41 540 13 25 353 56 51 3780 506 5340 128 70 376
Hg-Mercury(71900) --- 1 ug/I <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
Mn-Manganese(01055) --- SO ug/I <5 27 <5 <5 42 <5 21 73 23 10400 12 684 17
Ni-Nickel(01067) --- 100 ug/I <5 <5 <5 <5 <5 <5 <5 5 35 <5 <5 <5 <5
Pb-Lead(01051) --- 15 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
Zn-Zinc(01092) 1 mg/I <o.00I <0.005 0.01 <0.005 0.005 <0.005 0.031 0.011 0.006 <0.005 <0.005 <0.005 <0.005
Ba-Barium(01007) -- 700 ug/I 52 31 30 43 40 50 42 85 72 183 28 62 39
B-Boron(01022) --- 700 ug/I <50 <50 <50 <50 <50 <50 <50 <50 161 759 567 <50 <50
TI-Thallium(01059) 0.2 NE ug/I <0.2(B3) <0.2(B3) <0.2(B3) <0.2(B3) <0.2(B3) <0.2(B3) <0.2(B3) <0.2(B3) <0.2(B3) <0.2(83) <0.2(B3) <0.2(B3) <0.2(83)
Sb-Antimony(01097) 1 NE ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
Se-Selenium(01147) --- 20 ug/I 2.94 <1 <1 <1 <1 <1 <1 <1, <1 <1 1.98 <1 <1
Alkalinity-(00410) NE mg/I 47.2 40.4 42.8 50 5.3 63.6 23.9 48.1 14.1 55 66.3 51.6 40.8
Al-Aluminum(01105) --- NE ug/I 55 587 12 32 407 55 90 3720_ 818` 67 114 63 598
Be-Beryllium(01012) 4 NE ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
HCO3-Bicarbonate(00440) --- NE mg/I 47.2 40.4 42.8 50 5.3 63.6 23.9 48.1 14.1 55 66.3 51.6 40.8
Ca-Calcium(00916) -- NE mg/1 86.3(M4) 9.93 12.5 9.62 0.197 18.4 8.07 15.4, 4.8 12 29.1 15.6 16.4
CO3-Carbonate(00445) -- NE mg/I <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5
Co-Cobalt(01037) 1 NE ug/I _ <1 <1 <1 <1 <1 <1 <1 1.72 3.6_ 8.1_ <1 1.69 <1
Mg-Magnesium(00927) _ --- NE mg/I 21.2 5.46 3.45 3.35 1.09 4.74 3.47 4.88 2.14 6.55 6.63 6.94 3.92
Mo-Molybdenum(01062) --- NE ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
K-Potassium(00937) --- NE mg/I 2.55 5.31 1.47 • 2.54 0.853 2.46 1.26 2.75 1.52 1.02 2.23 1.8 1.53
Na-Sodium(82035) --- NE mg/I 9.64 6.46 7.46 8.88 2.4 8.05 6.41 9.88 21.5 11.6 11.9 12.3 9.69
TSS-Total Susp.Solids(70031) --- NE mg/I <5 <5 <5 <5 11 <5 <5 52 19 <5 <5 <5 <5
V-Vanadium(01087) 0.3 _ NE ug/I 2.07 1.47 4.45 1.71 0.773 3.58 0.899 15.6 1.57 <0.3 7.02 0.375 5.84
Sr-Strontium(01082) --- NE mg/I 0.632 0.046 0.178 0.121 <0.005 0.193 0.063 0.215 0.067 0.147 0.321 0.214 0.198
Turbidity is field analyzed for information use only
NE-Not Established BOLD values equal or exceed the corresponding 2L standard Notes:Note See attached sheet for data flag descripbors
I certify that,to the best of my knowledge and belief,the information submitted in this report is true,accurate,and complete,and that the laboratory analytical data was produced using approved methods of analysis by a DWQ-certified laboratory.,.lam aware that there are significant penalties for submitting false information,including the possibility of fines
and imprisonment for knowing violations. i .
il
P.Brent Dueitt/GM II Carolinas West/Plant Allen it • ,Mr 47 '/ D^ /
Permittee(or Authorized Agent)Name and Title-Please print or type Signature of Permittee .r Authorized Agent) Date
GW-S9CCR 09/2015 1-The IMACs were issued in 2010,2011,and 2012;however NCDEQ has not established 'Well located inside of compliance boundary
a 2L for these constituents as described in i5A NCAC 02L.0202(c).For this reason,
IMACs noted on the report are for reference only.

,111
GROUNDWATER QUALITY MONITORING Mail o 'n I DEPARTMENT OF ENVIRONMENTAL QUALITY
COMPLIANCE REPORT FORM and o: DIVISION OF WATER QUALITY-INFORMATION PROCESSING UNIT
1617 MAIL SERVICE CENTER,RALEIGH,NC 27699-1617 Phone:[phone]
FACIUTY INFORMATION Please Print Clearly or Type
Facility Name: Allen Steam Station Permit Type: NPDES Expiration Date: 5/31/2015 I
Permit Name(if different): Duke Energy Carolinas,LLC PERMIT Number: NC0004979
Facility Address: 253 Plant Allen Road I
(Street) TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
Belmont I NC I 28012 County Gaston
(City) (State) (Zip)
Contact Person: Sean DeNeale Telephone# [phone]
Well Location/Site Name: Allen Ash Basin No.of wells to be sampled: I 13
(from Permit)
March 2017 Monitoring Event
Qualifiers:
B3 Target analyte was detected in Continuing Calibration Blank(CCB)at a concentration greater than 1/2 the
reporting limit,but less than the reporting limit.
M4 The spike recovery value was unusable since the analyte concentration in the sample was disproportionate
to the spike level.The associated Laboratory Control Spike recovery was acceptable

DWRDivision of Water Resources Submitter Change Request Form— (Add update users)
North Carolina Electronic Discharge Monitoring Report System
EDMR registered Owners may use this form to add or update eDMR users to the NCDWR's Electronic
Discharge Monitoring Report system. if the Organization is not currently registered for eDMR,then the
Owner or designated Responsible Official will need to complete the required eDMR Registration Form
(available from the eDMR website)and submit it to the NCDWR eDMR Administrator at the address
below.
Ttpe of Request(please select):
X Add Submitter Permissions: (See Section B)
Update Submitter Permissions: (See Section B)
To add or update eDMR user permissions,please provide the following information:
Section A: Owner Information
NPDES Permit Number: NC0004979
Owner/Organization Name:
Duke Energy Carolinas LLC
Responsible Official
(as identified in accordance with 40(1 K/22 Z?) Brent Dueitt
Street Address: 253 Plant Allen Road
City: Belmont
State/Zip Code: NC 28012
Telephone number: ( 704 ) 829-2400
E-mail address: [e-mail]
Section B: Activate New Submitter or Update Existing User
Please complete the Submitter User Details on page 2 for the individuals who will need Submitter
permissions or to update Submitter details,such as adding additional permits,to an existing user.
Submitter permissions can only be assigned by the NCDWR eDMR Administrator. Note: The Owner
and Facility Administrator can deactivate or delete eDMR user permissions for any individual within
its organization, including Submitter permissions.
The Submitter is equivalent to the individual who sizns the certification statement on the back of the
Discharge Monitoring Report. The Submitter must be an individual with delegated signatory authority
for the Owner/Organization. if individuals other than the Responsible Official for the Owner have been
delegated signatory authority, the Division of Water Resources must be notified in writing of such
delegations. A delegation of authority form is available from the eDMR website.
In addition to the User Details, please specify the NPDES permit(s)that each user will be associated with
for eDMR submittal. Should additional space be needed for users and/or permits,please make additional
copies of the Submitter User Details page and complete as needed.
NCDWR eDMR Submitter Change Request Form-ver.1.0
Page 1

-- Submitter User Details
Permit No.(s): NC0004979
l I
First Name: Brandon
Middle Name: R
Last Name: Garrison
Phone Number: (704 ) 829_2426 :
Email: [e-mail] User ID:
(Assigned br NCDWR eDMR Administrator)_
Select Request In Add User Permission
Type: 0 Update User Permission
Add/Update User Permission as of(Date):
Submitter User Details
Permit No.(s): NC0004979 I I I I
First Name: Kristi
Middle Name: C
t
Last Name: McCall
Phone Number: ( 704 )829-2434
Email: [e-mail] User ID:
(Assigned by NCDWR eDMR Administrator)
Select Request ® Add User Permission
Type: 0 Update User Permission
Add/Update User Permission as of(Date):
Submitter User Details
Permit No.(s): I 1 I
First Name: I
Middle Name:
Last Name:
Phone Number: ( )
Email: User ID:
(Assigned by NCDWR eDMR Administrator)
Select Request 0 Add User Permission
Type: 0 Update User Permission
Add/Update User Permission as of(Date):
NCDWR eDMR Submitter Change Request Form—ver.1.0
Page 2

Responsible Official Authorization
The Responsible Official,as identified in accordance with 40 C.'FR 122.22, is the appropriate individual
with the authority to sign reports for the organization.
I. Brent Dueitt (printed name),have the authority to make this request for
Duke Energy Carolinas LLC/Allen Steam Station (Owner Organization Name).
1 request the NCDWR add or update the eDMR Submitter user permission(s)as indicated above on the
Submitter User Details page.
i3v hi_ ,L6:A.t..A4_,
Station Manager '7 c ' - /6
Owner/Responsible Official Signature Title Date
Please return the completed form to the NCDWR eDMR Administrator via:
Fax: or E-mail: or Mail to:
[phone] eDMRadmin a ncdenr.wov Information Processing Unit
Attn: eDMR Registration
1617 Mail Service Center
Raleigh,NC 27699-1617
NCDWR eDMR Submitter Change Request Form-ver.1.0 Page 3

•l RECEIVED/NCDENR/DW DUKE EHS
R CCP Environmental Programs
ENERGY® Duke Energy
{ 2 9 [i 16 526 South Church Street
Charlotte, NC 28202
WQROS
MOORESVILLE REGIONAL OFFICE Mailing Address:
EC13K/P.O.Box 1006
Charlotte,NC 28201-1006
28 April 2016
Mr. Sergei Chernikov
North Carolina Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Notification of Potential New Areas of Wetness (AOW) at Allen Steam Station
Dear Mr. Chernikov,
On 25 April 2016, three potential new AOWs were detected at Allen Steam Station. The
tentative names and approximate coordinates of the potential AOWs are given below:
S-08C 35.178110°, -81.006350°
S-11 35.180800°, -81.006140°
S-12 35.180973°, -81.006190°.
Initial field observations indicate that these potential AOWs cannot be sampled according to our
sampling method. Further evaluation of these potential AOWs will be performed.
Should you have any questions regarding this submittal or require additional information, please
contact Ross Hartfield at 980-373-6583 or at [e-mail].
Sincerely,
J r my .
Pruett,
PE
Manager of EHS CCP Permitting & Compliance
NCDEQ cc: Corey Basinger, Mooresville Regional Office
Duke cc: Ross Hartfield, Richard Baker, Scott Harris, Randy Gantt, Mary Parlemon
UPS Tracking: 1Z2124560194021121
1Z2124560193537737

•
, ROY COOPER
i Governor
mod ;
MICHAEL S. REGAN
Secretary
VaterResources S JAY ZIMMERMAN
ENVIRONMENTAL QUALITY
Director
March 24, 2017
E �L e---
Mr.-13r-ertt—Dtreitt, General Manager II
Regional Stations
Duke Energy Carolinas. LLC
253 Plant Allen Road
Belmont, NC 28012
Subject: Compliance Evaluation Inspection
Duke Energy Allen Steam Station
NPDES Permit No. NC0085588
Li In County
Dear Mr. Dueitt:
Enclosed is a copy of the Compliance Evaluation Inspection for the inspection conducted
at the subject facility on March 22, 2017, by Ori Tuvia and Brandy Costner. Michael Gantt's
cooperation during the site visit was much appreciated. Please advise the staff involved with
this NPDES Permit by forwarding a copy of the enclosed report.
As was discussed during the inspection, DMRs must indicate all certified labs used for
the sampling done for that month's DMR.
The report should be self-explanatory; however, should you have any questions
concerning this report, please do not hesitate to contact Ori Tuvia at [phone], or at
[e-mail].
Sincerely,
Ori Tuvia, Environmental Engineer
Mooresville Regional Office
Division of Water Resources, DEQ
Cc: NPDES Unit
Gaston County Health Department
MRO Files
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115
Phone:[phone]\Fax:[phone] Customer Service:1-877-623-6748

Will11111111..-
United States Environmental Protection Agency Form Approved.
tl"iA Washington.D.0 20460 OMB No.2040-0057
Water_Gonipliance Inspection Report Approval expires 8-31`98_
Section A:National Data System Coding(i.e.,PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 !ti r 2 I5 I 3 I NO3004979 111 121 17/03/22 117 18(r l 19 Ls r 201 I
211 1 1 1 1 1 I I I I II 1 i i I I t l l I I I I I 1 1 1 1 1 1 1 1 I I I1 1 1 1 1 1 (�
Inspection Work Days Facfity Self-Monitoring Evaluation Rating B1 QA Reserved
6711.0" 701 l-e 1 i 71 I Lu 1 72 L--N 73 rI I 174 751 1 1 1 1 1 1 1'
Section B.Faciityy Data '
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number) 10:05AM 17/03/22 11/03/01
Plant Allen Steam Station
253 Plant Men Rd Exit Time/Date Permit Expiration Date
Belmont NC 28012 02:00PM 17/03/22 15/05/31
Name(s)of Onsite Representative(s)lTitles(s)/Phone and Fax Nurnber(s) Other Facility Data
11/
Mfichael R Gantt/ORC/704-829-2587/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Allen Stowe,526 S Chruch St Charlotte NC 282011002!/704-382-4309/7043829840
No
Section C:Areas Evaluated During Inspection(Check only those areas evaluated)
Permit II Flow Measurement Operations&Maintenance 111 Records/Reports
II Self-Monitoring Program II Sludge Handling Disposal II Facility Site Review II Effluent/Receiving Waters
Laboratory
Section D:Summary of Findng/Comments(Mach additional sheets of narrative and checklists as necessary)
(See attachment summary) •
Name(s)and Signature(s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Oil A Tuvia MRO WQ/R04-663-1699/
V214 1201,
Signature of Management Q A eviewer Agency/Office/Phone and Fax Numbers Date
Andrew Pitner i MRO WO.//704-863-1699 Ext.21 '24..Z - t]
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

NPDES yNnrolday Inspection Type 1
31 NC0004979 Ill 121 17/03/22 117 18 I„I
Section D:Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Brandy Costner was a secondary inspector
Page# 2

111.11111.11W-
Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 03/22/2017 Inspection Type: Compliance Evaluation
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new • ❑ ❑ ❑
application?
Is the facility as described in the permit? MO ❑ ❑
#Are there any special conditions for the permit? U 0 0 0
Is access to the plant site restricted to the general public? ■ ❑ ❑ ❑
Is the inspector granted access to all areas for inspection? • ❑ ❑ ❑
Comment: The Division received the permit renewal package on 10/15/2014.
No chlorination is added to Outfalls 001, 003,and 004
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? ❑ ❑
Is all required information readily available, complete and current? ■ ❑ ❑ ❑
Are all records maintained for 3 years(lab. reg. required 5 years)? U ❑ ❑ ❑
Are analytical results consistent with data reported on DMRs? ■ ❑ ❑ ❑
Is the chain-of-custody complete? • ❑ ❑ ❑
Dates,times and location of sampling •
Name of individual performing the sampling S
Results of analysis and calibration •
Dates of analysis •
Name of person performing analyses •
Transported COCs U
Are DMRs complete:do they include all permit parameters? ■ ❑ ❑ ❑
Has the facility submitted its annual compliance report to users and DWG)? ❑ 0 • ❑
(If the facility is=or>5 MGD permitted flow)Do they operate 24/7 with a certified operator 0 0 II 0
on each shift?
Is the ORC visitation log available and current? ■ 0 0 0
Is the ORC certified at grade equal to or higher than the facility classification? • ❑ 0 ❑
Is the backup operator certified at one grade less or greater than the facility classification? • ❑ ❑ ❑
Is a copy of the current NPDES permit available on site? • ❑ 0 0
Facility has copy of previous year's Annual Report on file for review? ❑ ❑ � ❑
Comment: The records reviewed during the inspection were organized and well maintained. DMRs,
COCs,ORC logs and calibration Togs were reviewed for the period February 2016 through
January 2017. No limit violations were reported and all monitoring frequencies were correct.
ORC must indicate on future DMRs all certified labs used for the sampling done for that
months DMR.
Page# 3

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 03/22/2017 Inspection Type. Compliance Evaluation
La oratory _._._. . • Yes Na NA NE
Are field parameters performed by certified personnel or laboratory? • 0 0 0
Are all other parameters(excluding field parameters)performed by a certified lab? III 0 0 0
#Is the facility using a contract lab? • 0 0 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees • 0 0 ❑
Celsius)?
Incubator(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? ❑ 0 II 0
Incubator MOD)set to 20.0 degrees Celsius+1-1.0 degrees? ❑ 0 I 0
Comment: The facility is certified to perform on-site field analyses(pH and temperature)under
laboratory certification#5134. The remaining permit-required effluent analyses are
performed by Duke Energy's Environmental Services Laboratory(Certification#248)and the
contracted services of Prism Labs(low level mercury)and ETS, Inc. (toxicity).
Influent Sampling Yes No NA NE
#Is composite sampling flow proportional? ❑ ❑ • ❑
Is sample collected above side streams? • 0 0 ❑
Is proper volume collected? • 0 0 0
Is the tubing clean? 0 0 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees ❑ ❑ ■ ❑
Celsius)?
Is sampling performed according to the permit? t 0 0 0
Comment: The subject permit requires grab samples at the internal Outfall 005(FGD treatment system
effluent)prior to entering the ash basin.
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? 0 0 • ❑
Is sample collected below all treatment units? II 0 0 0
Is proper volume collected? • 0 ❑ 0
Is the tubing clean? 0 0 • 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees ❑ 0 II 0
Celsius)?
Is the facility sampling performed as required by the permit(frequency,sampling type U 0 0 0
representative)?
Comment: The subiect permit requires effluent grab samples.
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ 0 0 0
Page# 4

Permit: NC0004979 Owner-Facility: Plant Alien Steam Station
Inspection Date: 0 3122/201 7 Inspection Type Compiance Evaluation
Operations & Maintenance Yes No NA NE
Does the facility analyze process control parameters,for ex: MLSS, MCRT,Settleable 0 ❑ II 0
Solids,pH,DO,Sludge Judge,and other that are applicable?
Comment: The facility was not generating electricity at the time of the inspection. The ash basin and
FGD wastewater treatment system(WWTS)appeared to be properly operated and well
maintained. The FGD WWTS is connected to a computer monitoring system to assist the
on-site staff in the operation of the treatment units/processes.
Equalization Basins Yes No NA NE
Is the basin aerated? ❑ ❑ • ❑
Is the basin free of bypass lines or structures to the natural environment? • ❑ 0 0
Is the basin free of excessive grease? • ❑ ❑ ❑
Are all pumps present? e ❑ 0 ❑
Are all pumps operable? • ❑ ❑
Are float controls operable? • 0 0 0
Are audible and visual alarms operable? ❑ ❑ • 0
#Is basin size/volume adequate? • ❑ 0 0
Comment:
Chemical Feed Yes No NA NE
Is containment adequate? • ❑ ❑ ❑
Is storage adequate? ❑ ❑
Are backup pumps available? • 0 0 0
Is the site free of excessive leaking? ■ ❑ ❑ ❑
Comment: Emergency response plan, including the chemical feed storage,was last updated on
2/28/2017
Secondary Clarifier Yes No NA NE
Is the clarifier free of black and odorous wastewater? • 0 0 ❑
Is the site free of excessive buildup of solids in center well of circular clarifier? U ❑ ❑ ❑
Are weirs level? • 0 0 ❑
Is the site free of weir blockage? • 0 0 0
Is the site free of evidence of short-circuiting? • 0 0 0
Is scum removal adequate? 0 0 ❑
Is the site free of excessive floating sludge? • ❑ 0 ❑
Is the drive unit operational? • ❑ ❑ 0
Page# 5

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 03/22/2017 Inspection Type Compliance Evaluation
Secondary Clarifier Yes No NA NE
Is the return rate acceptable(low turbulence)? • ❑ ❑ ❑
Is the overflow clear of excessive solids/pin floc? ■ ❑ ❑ ❑
Is the sludge blanket level acceptable?(Approximately' of the sidewall depth) • ❑ ❑ ❑
Comment:
Flow Measurement- Influent Yes No NA NE
#Is flow meter used for reporting? • ❑ ❑ ❑
Is flow meter calibrated annually? MO ❑ ❑
Is the flow meter operational? III ❑ ❑ ❑
(If units are separated)Does the chart recorder match the flow meter? ❑ ❑ II ❑
Comment: The FGD WWTS effluent is measured by an in-line flow meter. The flow meter is
calibrated/verified annually and was calibrated/verified on 3/23/2016 by the on-site
wastewater staff.
Solids Handling Equipment Yes No NA NE
Is the equipment operational? • ❑ ❑ ❑
Is the chemical feed equipment operational? • ❑ ❑ ❑
Is storage adequate? • ❑ ❑ ❑
Is the site free of high level of solids in filtrate from filter presses or vacuum filters? ❑ ❑ ❑ •
Is the site free of sludge buildup on belts and/or rollers of filter press? ❑ ❑ ❑ �
Is the site free of excessive moisture in belt filter press sludge cake? ❑ ❑ ❑ U
The facility has an approved sludge management plan? • ❑ ❑ Cl
Comment: The FGO WWTS is equipped with three operational fitter presses: however,these units
were not in service at the time of the inspection. The dewatered sludge is transported to the
on-site landfill equipped with a liner and leachate collection system. •
The dry ash and sluiced ash (removed from the ash basin treatment system)are also
disposed into the on-site landfill.The gypsum material from the FGD system is reused by an
outside company(National Gypsum)in the dry wall market.
Flow Measurement- Effluent Yes No NA NE
#Is flow meter used for reporting? ❑ ❑ • ❑
Is flow meter calibrated annually? ❑ EMI ❑
Is the flow meter operational? ❑ ❑ ■ ❑
(If units are separated)Does the chart recorder match the flow meter? ❑ ❑ • ❑
Page# 6

PillF111111"--
Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 03/22/201 T Inspection Type: Compliance Evaluation
Flow Measurement -Effluent Yes No NA NE
Comment: Flow measurements for Outfalls 001,003,and 004 are based on pump curves/logs. Outfall
002 discharges are measured by a staff quage/ultrasonic level indicator and weir. The ORC
verifies the Outfall 002 flow measurement system annually.
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? ■ ❑ ❑ ❑
Are the receiving water free of foam other than trace amounts and other debris? I ❑ ❑ ❑
If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ ❑
Comment: No discharges were observed from Outfalls 002A,0028,and 005(internal)at the time of the
inspection. The effluents from Outfalls 001,002, 003, and 004 effluents were clear with no
floatable solids or foam. The receiving stream did not
appear to be negatively impacted.
Page# 7

Allen Steam Station
IP o DUKE 253 Plant Allen Road
::: 80.2
2 Ai
Ir ENERGY,
704 382 6240 fax
RECEIVED/NCDENR/OWR
August 17, 2016 A()I, 2 9 2016
tf CFII/ED wcaROS
North Carolina Department of EnvironmentaQ� t MOORESVILLE REGIONAL OFFICE
Division of Water Resources ' 20�6
Information Processing
1617 Mail Service Center ON fNFORMA ONR ESSINGUNIT
Raleigh, NC 27699-1617
RE: Duke Energy Carolinas, LLC.—Allen Steam Station
July 2016 Groundwater Monitoring Sampling and Analysis Results
Duke Energy Carolinas, LLC. (DEC) sampled thirteen groundwater monitoring wells at the Allen Steam
Station (NPDES Permit#NC0004979) on July 7, 2016. Attached are two copies of the results on DEQ
approved electronic version of Form GW-59CCR.
As required by the GW-59CCR form, parameters exceeding the generic standards published at 15A NCAC
02L.0202(g-h) have been bolded. ,(g ) per 15A NCAC 02L.0202(b), where naturally occurring
substances exceed the generic standards, the appropriate 2L standard shall be the naturally occurring
concentration as determined by the Director. All values reported on the attached reports are
dependent on the accuracy of approved analytical methods used to measure parameters.
Should you have questions regarding this report, please contact Sean DeNeale at(704) 382-4761.
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.
Sincerely,
6,.....g 6,,,,,,3--0--
';,:...
,_� P.
P. Brent Dueitt
Allen Steam Station
General Manager II Carolinas West

GROUNDWATER QUALITY MONITORINGprr
DEPARTMENT OFENYIItONMENTALQUALtTY
COMPLIANCE REPORT FORM
and, rto;:-
,. DIVISION OF WATER QUALITY-INFORMATION PROCESSING UNIT
, �; 1617 MAIL SERVICE CENTER,RALEIGH,NC 27699-1617 Phone:[phone]
FACILITY INFORMATION Please Print dearly or Type
Facility Name: Allen Steam Station Permit Type: NPDES Expiration Date: 5/31/2015 .4114111141
Permit ame(if different): Duke Energy Carolinas,LLC PERMIT Number: NC0004979 RECEIVEDMCDENR/DWF{
Facility
Address: 253 Plant Allen Road
(Street) TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
Belmont I NC 1 28012 I County Gaston A U G 2 9 2316
IC,q (Statei (2,p)
Contact Person Sean DeNeale Telephones I 704-382-4761 WORDS
Well Location/Site Name: Allen Ash Basin No.of wells to be sampled: I 13
(tram Permltj
MOORESVILLE RENAL OFFICE
Monitoring Well Construction Information
Well ID Number(From Permit)
Units AB-1R AB-45 AB-4D AB-11D AB-125 AB-12D AB-135 AB-13D AB-14D AB-95* AB-90' AB-10S' AB-10D' MW- MW- MW- MW- MW-
Well Depth [ft below land surface] ft 70 89 22 38 49 99 20 53 23 S8 95 53 21 97 72 20 29 45 21 01 115 23 18 41 62 44
Measuring Point(toc)(ft above land surface] ft 2.29 2 52 2 19 2 68 2 05 2 04_ 2 74 2 65 2 44 2 19 2 35 2 44 2 56
Well Diameter in 2.0 20 2.0 20 2.0 20 _ 20 20 20 2.0 20 20 20 .
Screen Top [ft below land surface] ft 60.89 7.38 44.99 15.53 8 58 91 53 6.97 6/.20 24.45 6 01 110.23 3.41 57.44
-
Screen Bottom [ft below land surface] ft 70.89 22.38 49.99 20 53 23 58 96 53 21.9/ 12 20 29.45 21 01 115 23 18.41 62.44
Relative Measuring Point Elevation ft 675.86 650.46 649.17 618 07 651.69 651.75 648.72 648 54 641.80 582 73 582 72 5/5.05 574 97
Sampling(nfehnation and AIM Analysis
CHECK IF DRY WELL AT TIME OF SAMPLING U DRY ❑ DRY J DR, L: �c.Y Li DR [-]DRY L,' DRY D DRY U DR L) DR,' 1 j DRY _ UP:Y L.; EA, LI DRY L DRY L) URA r"" DRY LI DRY
I 15A-2L Units AB-1R AB-45 AB-4D AB-110 AB-125 AB-12D AB-135 AB-13D AB-14D AB-9S' AB-90• AB-105' AB-10D' MW- MW- MW- MW- MW-
Sample Date 07/07/2016 07/07/2016 07/07/2016 07/07/2016 07/07/2016 07/07/2016 07/07/2016 07/07/2016 07/07/2016 07/07/2016 07/07/2016 07/07/2016 07/07/2016
Volume of Water pumped/bailed gal 3 30 5.50 12.45 4.00. 2 10 15 05 14.00 1.05 8.35 5 25 3 30 1.95 4.20
Temperature(00010) deg.C 16.7 16.5 16.3 16.5 15.3 15 8 16.9 20 7 16.4 19.8 18.7 17.3 17.1
Odor(00085) None None None None None None None None None None None None None
Appearance Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal
Turbidity(82078) NTU 2.16 8.09 0.75 8.15 9.52 2.59 1.8 6-4 10 4.02 3.43 3.56 5.49
Dissolved Oxygen(00300) mg/L 7.96 0.0 4.05 1 16 4.19 5.23 1.02 2.09 2.65 0 24 0.35 0.15 0.24
Oxidation Reduction Potential(00090) mV 568 241 397 276 346 321 550 S00 388 181 242 365 363
Specific Cond-field(00094) umhos/cm 621 130 121 112 23 152 102 159 145 236 257 189 163
Water Level(ft below measuring pt.](82546) ft 52 06 11.06 9.56 7 71 14.09 12.23 9.34 9.37 14.98 12.18 14.01 8-48 8 46
pH-field(00400) 6.5-8.5 SU 6.3 6.1 6.0 6.0 5.1 6.4 5.6 6.2 5.4 6.3 6.6 6.1 6.2
• [au to j1nfofl tat1on
Laboratory Name I Duke Energy Analytical Laboratory Certifications Samples for metals were collected unfiltered: I? Yes 0 No
Sample Analysis Date July 7-20,2016 + I NC DENR s 248 I
l and field acidified: 0 Yes 0 No
IMACI 15A-21. Units AB-1R AB-45 AB-4D AB-110 AB-125 AB-12D AB-135 AB-130 AB-14D AB-95* AB-9D' AB-105• AB-100' J MW- MW- MW- MW- MW-
TDS-Total Diss.Solids(70300) -- 500 mg/I 460 81 120 95 <25 120 65 130 100 110 180 110 140
Cl-Chloride(00940) • -- 250 mg/I 1.1 5.8 5.8 5.8 2.9 4.7 10 9.8 9.5 9.4 8.2 13 7.9
As-Arsenic(01002) -- 10 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
SO4-Sulfate(00945) -- 250 mg/I 270 9.5 3.8 0.38 0.2 4.7 0.82 0.59 25 32 45 18 23
Nitrate(NO3)as N(00620) -- 10 mg/I 0.14 0.77 1.9 0.05 0.05 1.9 2.2 2.5 2.7 <0.023 0.05 <0.023 <0.023
Cd-Cadmium(01027) -- 2 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
Cr-Chromium(01034) -- 10 ug/I 6 <5 6 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5
Cu-Copper(01042) -- 1 mg/I <0.005 <0.005 0.015 <0.005 <0.005 <0.005 <0.005 <0.005 0.06 <0.005 <0.005 <0.005 <0.005
Fe-Iron(01045) - 300 ug/I 48 859 15 164 491 169 27 195 378 9430 132 160 231
Hg-Mercury(71900) - 1 ug/I <0.05 <0.05 <0.05 <0.05 <0.05 <0.05_ <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
Mn-Manganese(01055) -- SO ug/I 6 159 <5 <5 45 <5 27 8 31 8140 14 622 13
Ni-Nickel(01067) -- 100 ug/I <5 <5 <5 <5 <5 <5 <5 <5 57 <5 <5 <5 <5
Pb-Lead(01051) -- 15 ug/I <1 <1 <1 <1 <1 <1_ <1 <1 <1 <1 <1 <1 <1
Zn•Zinc(01092) -- 1 mg/1 0.018 <0.005 0.009 0.05 0.023 0.015 0.01 <0.005 0.011 0.006 <0.005 <0.005 <0.005
Ba-Barium(01007) -- 700 ug/I 71 28 32 44 39 47 39 45 70 159 29 58 38
B-Boron(01022) -- 700 ug/I <50 <50 <50 <50 <50 <50 <50 <50 147 682 573 <50 <50
TI-Thallium(01059) 0.2 NE ug/l 0.426 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2
Sb-Antimony(01097) 1 NE ug/1 <1 <1 <1 <1 <1 <1_ <1 <1 <1 <1 <1 <1 <1
Se-Selenium(01147) -- 20 ug/I 3.51 <1 <1 <1 <1 <1 <1 <1 <1 <1 2.24 <1 <1 _
Alkalinity-(00410) -- NE mg/I 51.6 42.9 43.2 50.1 <5 62.9 34.8 48.5 15.7 52.1 65.7 56.2(M1) 40.7
Al-Aluminum(01105) -- NE ug/I 44 329 13 170 492 148'- 22 186 432 60 118 73 272
Be-Beryllium(01012) 4 NE ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
HCO3-Bicarbonate(00440) --- NE mg/I 51.6 42.9 43.2 50.1 <5 62.9 34.8 48.5 15.7 52.1 65.7 56.2 40.7
Ca-Caldum(00916) -- NE mg/I 83.6 8.69 12.2 10 0.337 16.4 6.52 14.3 4.87 10.7 27.3 14 15.6
CO3-Carbonate(00445) - NE mg/1 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5
Co•Cobalt(01037) _ 1 NE ug/l <1 1.08 <1 <1 <1 <1 <1 <1 6.22 8.3 <1 1.72 <1
Mg-Magnesium(00927) --- NE mg/I 19.8 4.95 3.47 3.29 1.12 4.31 3.15 3.52 2.18 5.96 6.6 6.51 3.76
Mo-Molybdenum(01062) --- NE ug/I <1 <1 <1 <1 <1 <1_ <1 1.15 <1 <1 <1 <1 <1
K-Potassium(00937) -- NE mg/I 2.73 5.03 1.53 2.5 0.845 2.33 1.19 1.72 1.5 0.912 2.23 1.63 1.5
Na-Sodium(82035) --- NE mg/I 10.9 6.85 822 8 89 2.25 7.68 5.97 9.63 19.5 11 2 11.9 11 9.58
T5$-Total Susp.Solids(70031) -- NE mg/I <5 <5 <5 t5 11 <5 <5 <5 12 <5 <5 <5 <5
V-Vanadium(01087) 0.3 NE ug/1 2.15 1 7 4.49 7A9 0 952 4.07_ 0 79 6.69 1.26 <0.3 7.21 0.446 5.66
Sr-Strontium(01082) --- NE mg/I 0.751 0.041 0.181 0 1i4 <0.005 0.175 0.058 0.197 0.073 0.139 0.315 0.194 0.188
Turb,ddy,s field analyzed for information use only
v= -N;:•=.tabl 0..,1 BOLD va4.es equal or exceed the corresponding 2L standard I certify that,to the best of my knowledge and belief,the infonnatibn subted In this report is true,accurate,and complete,and that the laboratory arialyboal data wa
s as produced u approved methods of analysts by a DWQ-cert id tab00'010y, Iain aware that there are significant penalties for submitting false information,including the pessfoitty of fines
and imprisonment for knowing violations.
P.Brent Dueitt/GM II Carolinas West/Plant Allen p r/ vv /7- V
Q�� �o/
Per•attee(or Authorized Agent)Name and";t e-Please print or type Signature of Perm1tte- or Authorized Agent) Date
GW-59CCR 09/2015 1-The IMACs were issued in 2010,2011,and 2012;however NCDEQ has not established - •Wei!,ocated inside of compliance boundary
a 2L for these constituents as described in 15A NCAC 02L.0202(c).For this reason.
IMACs noted on the report are for reference only.

Allen Steam Station
41 �� � 253 Plant Alien Road
1) ir Belmont NC 213012
i..! � � �A 704.382 4761
R F r F IVED 704 3826240 lax
APR 1 $ 2016
April 13, 2016 UVtiRSECTION OCCI
North Carolina Department of NFORA4ATiON SSING UNIT
RECEIVED/NCCENR/DWR
Environmental Quality
Division of Water Resources APR 2 5 2016
Information Processing Unit
1617 Mail Service Center WQROS
Raleigh, NC 27699-1617 MQORESVILLE REGIONAL OFFICE
RE: Duke Energy Carolinas, LLC. —Allen Steam Station
March 2016 Groundwater Monitoring Sampling and Analysis Results
Duke Energy Carolinas, LLC. (DEC) sampled thirteen groundwater monitoring wells at the Allen Steam
Station (NPDES Permit#NC0004979) on March 3, 2016. Attached are two copies of the results on DEQ
approved electronic version of Form GW-59CCR.
As required by the GW-59CCR form, parameters exceeding the generic standards published at 15A NCAC
02L.0202(g-h) have been bolded. However, per 15A NCAC 02L.0202(b), where naturally occurring
substances exceed the generic standards,the appropriate 2L standard shall be the naturally occurring
concentration as determined by the Director. All values reported on the attached reports are
dependent on the accuracy of approved analytical methods used to measure parameters.
Should you have questions regarding this report, please contact Sean DeNeale at [phone].
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. lam aware that there are
significant penalties for submitting false information, including the possibility of fines and imprisonment
for knowing violations.
Sincerely,
<P. 6../V\,.....rg— 6.),A_Ajt
P. Brent Dueitt
Allen Steam Station
General Manager II'Carolinas West

PiFr
GROUNDWATER QUALITY MONITORING COMPLIANCE REPORT FORM
FACILITY INFORMATION
Mal DEPARTMENT OF ENVIRONMENTAL QUALITY
andDIVISION OF WATER QUAt1TY-INFORMATION PROCESSING UNIT
^., . '1617 MAIL SERVICE CENTER,RALEIGH,NC 27699-1617 Phone:[phone]
Please Print Clearly or Type
Facility Name: Allen Steam Station Permit Type: NPDES Expiration Date: I 5/31/2015 ,
Permit Name(if different): Duke Energy Carolinas,LLC PERMIT Number: NC0004979
Facility Address: 253 Plant Allen Road
(street) TYPE Of PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
Belmont I NC I 28012 I County I Gaston I
(city) (State) (GP) .
Contact Person: Sean DeNeale Telephone* I 704-382-4761
Well Location/Site Name: Allen Ash Basin No.of wens to be sampled: l 13
(from Permit)
Monitotilfg Well ca»tn ct(on Uttormat(on
Well ID Number(From Permit)
Units AB-1R AB-45 AB-4D AB-11D AB-125 AB-120 AB-13S AB-131) AB-14D AB-95• AB-90• AB-10S' AB-100* MW- MW- MW- MW- MW-
Well Depth(ft below land surface] h 70.89 22.38 49.99 20.53 23.58 96.53 21-97 72 20 29.45 21.01 115.23 18.41 62.44
Measuring Point(toc)(ft above land surface] ft 2.29 2.52 2.19 2.68 2.05 2 04 2.74 2.65 2.44 2.19 2.35 2.44 2.56
Well Diameter in 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
Screen Top(ft below land surface] ft _ 60.89 7.38 44.99 15.53 8.58_ 91.53 6.97 67.20_ 24.45 6.01 110.23 3.41 57.44
Screen Bottom[h below land surface] ft 70.89 22.38 49.99 20.53_ 23.58 96.53 21.97 72.20 29.45 21.01 115.23 18.41 62 44
Relative Measuring Point Elevation ft 675.86 650.46 649.17 618.07 651.69 651.75 648.72 648.54 641.80 582.73 582.72 575.05 574.97
•
• _ SaniPilliglikfOiThatia0 ard.F 1d AAa Ygis
CHECK IF DRY WELL AT TIME OF SAMPLING ❑atr 0 oar ❑ DRY ❑ DRY ❑rev ❑oar 0 fxtr 0 ow • ❑ oar ❑ oar ❑ oar ❑oar ❑ pity ❑oar ❑rev [] oar 0 oar ❑ oar
I 1SA-2L Units AB-1R AB-45 AB-40 AB-11D AB-125 AB-12D AB-135 AB-130 AB-14D J... AB-95• AB-9D• AB-10S• AB-100* MW- MW- MW- MW- MW-
Sample Date 03/03/2016 03/03/2016 03/03/2016 03/03/2016 03/03/2016 03/03/2016 03/03/2016 03/03/2016 03/03/2016 03/03/2016 03/03/2016 03/03/2016 03/03/2016
Volume of Water pumped/bailed gal 1.80_ 6.10 30.70 6.85 4.55 21.05 16.25 2.35 4.65 5.25 2.85 2.65 5.30
Temperature(00010) deg.C 15-6 15.3 16.1 13.6 14.5 15.5 15.9 15.0 15.8 17.1_ 17.6 15.0 15.4
Odor(00085) None None None None None None None None None None_ None None None
Appearance Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal
Turbidity(82078) NTU 5.46 16.2 1.14 30.5_ 21.5 4.03 2.51 32.4 72.5 19.3 7.09 3.19 17
Dissolved Oxygen(00300) mall 8.1 0 3.85 0.24 4.34 5.26 0 0.68 2.81 0 0 0 0
Oxidation Reduction Potential(00090) mV _ 516 371 441 411 492 436 462 434_ 445 202 284 333 339
Specific Coed-field(00094) umhos/cm 367 127 122 114 25 154 97 147 160 223 253 177 157
Water Level(ft below measuring pt.](82546) ft 53.29 7.78 6.48 5.92 10.3 9.06 5.48 5.84 12.99 11.52 14.34 8.89 8.99
pH-field(00400) 6.5-8.5 SU 5.9 6.0 6.0 6.0 5.0 6.4 5.2 5.9 5.3 5.9 6.3 5.7 5.8
Laboratory Name Duke Energy Analytical Laboratory Certification If 1 Samples for metals were collected unfiltered: ❑, Yes ❑ No
Sample Analysis Date I I March 4-11,2016 NC DENR It 248 and field acidified: ❑, Yes ❑ No
IMAC1 15A-2L Units AB-1R AB-45 AB-4D AB-11D AB-125 AB-12D AB-135 AB-130 AB-14D AB-9S• AB-90• AB-105• A13-10D• MW- MW- MW- MW- MW-
TDS-Total Diss.Solids(70300) -- S00 mg/I 260 70 100 98 <25 110 61 130 130 110 180 100 150
Cl-Chloride(00940) - 250 mg/I 1.3 6.5 6.8 6.2 3.4 5.2 11 11 12 10 9.3 13 8.7
As-Arsenic(01002) --- 10 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1_ <1
SO4-Sulfate(00945) -- 250 mg/I 130 12 4.4 0.43` 0.13 5 1.2 0.64 32 39 47 17 24
Nitrate(NO3)as N(00620) - 10 mg/I 0.12 1.4 2.1 0.04 0.04 1.9 2 2.4 2.6_ 0.05 0.04 0.05 <0.023
Cd-Cadmium(01027) -- 2 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <i <1 <1 <1 <1
cr.Chromium(01034) -- 10 ug/I <5 <5 6 <5 <5 <5 <5 <5 <5 <5 <5 <5 6
a Cu-Copper(01042) -- 1 mg/I <0.005 <0.005 0.012 <0.005 <0.005 <0.005 <0.005 <0.005 0.051 <0.005 <0.005 <0.005 <0.005
Fe-Iron(01045) - 300 ugh] 166 1140 13 699 2770 270 24 1700_ 1760 4470 333 206 980
Hg-Mercury(71900) -- 1 ug/I _ <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 0.1 <0.05 4).05 <0.05 <0.05 <0.05 <0.05
Mn-Manganese(01055) -- 50 ug/l 8 49 <5 5 132 6 57 37 40 9520 18 557 33
Ni-Nickel(01067) -- 100 ug/l <5 <5 <5 <5 <5 <5 <5 <5 35 <5 <5 <5 <5
Pb-Lead(01051) -- 15 ug/l <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
Zn-Zinc(01092) --- 1 mg/I <0.005 <0.005 0.01 <0.005 0.009 <0.005 0.009 0.005 0.007 <0.005 <0.005 <0.005 <0.005
Ba-Barium(01007) -- 700 ug/I 61 30 30 45 62 48 37 64 93 163 29_ 56 39
B-Boron(01022) -- 700 ug/I <50 <50 <50 <50 <50 <50 <50 <50 159 705 548 <50 <50
Ti-Thallium(01059) 0.2 NE ug/1 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2
Sb-Antimony(01097) 1 NE ug/I _ 2.57(8) 2.46(B) 2.54(8) 2.5(B) 1.92(8) 2.56(8) 2.49(B) 2.45(8) 2(B) 2.52(B) 2.19(8) 2.58(B) 2.35(8)
Se-Selenium(01147) -- 20 ug/I 2.44 <1 <1 <1 <1 <1 <1 <1 <1 <1 2.53 <1 <1
Alkalinity-(00410) - NE mg/I _ 52.2 35 22.2 56.6 <5_ 55.2 24.8 34.9 13.1 53 93.6 67.5 44.4
Al-Aluminum(01105) - NE ugh 171 1140 14 753 2890 240 22 1640 2240 47 301 56 1340
Be-Beryllium(01012) 4 NE ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
HCO3-Bicarbonate(00440) -- NE mg/I 52.2 34.7 22.2_ 56.6 <5 55.2 24.8 34.9 13.1 53 93.6 67.5 44.4
Ca-Caldum(00916) --- NE mg/I 43.5 8.62 11.5 9.21 0.221 16.3 6.92 14.5 4.96 11.1 26.4 13.7 15.2
CO3-Carbonate(00445) --- NE mg/I <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5
Co-Cobalt(01037) 1 NE ug/I <1 <1 <1 <1 1.85 <1 1.38 <1 4.27 7.69 <1 1.78 <1
Mg-Magnesium(00927) -- NE mg/I 10.3 5.13 3.39 3.38 1.8 4.47 2.91 4.28 2.53 6.42 6.69 6.42 3.75
Mo-Molybdenum(01062) -- NE ug/I <1 <1 <1 <1 <1 <1 <1 1.25 <1 <1 <1 <1 <1
K-Potassium(00937) -- NE mg/I 2.28 4.89 1.4 2.54 1.48 2.38 1.5 2.22 1.68 0.993 2.26 1.67 1.56
Na-Sodium(82035) --- NE mg/I 8.82 6.7 7.46 8.85 2.32 7.72 5.79 9.23 22.4 10.7 11.3 10.8 8.99
T55-Total Susp.Solids(70031) -- NE _ mg/I 5 26 <5 17 47 6 <5 32 78 <5 6 <5 <5
V-Vanadium(01087) 0.3 NE ug/I 2.85 2.88 4.79 4.03 6.26 4.59 0.709 11.3 4.68 <0.3 7.15 0.442 8.56
Sr-Strontium(01082) -- NE mg/I 0.454 0.042 0.164 0.12 <0.005 0.172 0.056 0.202 0.08 0.135 0.313 0.1881 0.184 I I I
Turbidity is field analyzed for information use only
NE'Not Established BOLD values equal or exceed the corresponding 2L standard Notes:(BI Apparent sample contamination/Sh detected in field blank at a concentration of 3 11 ug/,
I certify that,to the best of my knowledge and belief,the information submitted in this report is true,accurate,and complete,and that the laboratory analytical data was produced using approved methods of analysis by a DWQ-certified laboratory,,.. I am aware that there are significant penalties for submitting false information,including the possibility of fines
and imprisonment for knowing violations. ,
P . - ���
P.Brent Dueitt/GM II Carolinas West/Plant Allen I
v. Li- LI-16
Permittee(or Authorized Agent)Name and Title-Please print or type Signature of Permittee •r Authorized Agent) Date
GW-59CCR 09/2015 1-The IMACs were issued in 2010,2011,and 2012;however NCDEQ has not established 'Well located inside of compliance boundary
a 2L for these constituents as described in 15A NCAC 02L.0202(c).For this reason,
IMACs noted on the report are for reference nnly

PAT MCCRORY
s 7. Covet no,.
DONALD R. VAN DER VAART
sect efalI
Water Resources S. JAY ZIMMERMAN
ENVIRONMENTAL QUALITY
Di,ector
March 31, 2016 RECEIVED/NCDENR/DWR
APR 4 2016
Michael Ruhe
WQROS
Duke Energy Carolinas LLC MOORESVILLE RECIONAL OFFICE
PO Box 1006
Charlotte, NC 28201-1006
Subject: NPDES Electronic Reporting Requirements and
Sixty Day Notice of Minor Modification of the NPDES Permit
Plant Allen Steam Station
NPDES Permit Number: NC0004979
Dear NPDES Permittee:
The U.S. Environmental Protection Agency(EPA) recently published the National Pollutant Discharge
Elimination System (NPDES) Electronic Reporting Rule.The rule requires NPDES regulated facilities to
report information electronically, instead of filing written paper reports.The rule does not change what
information is required from facilities. It only changes the method by which information is provided (i.e.,
electronic rather than paper-based).
EPA is phasing in the requirements of the rule over a 5-year period. The two phases of the rule, and their
key milestones, are:
• Phase 1—Starting on December 21,2016, regulated entities that are required to submit Discharge
Monitoring Reports (DMRs) will begin submitting these reports electronically, instead of on
paper. If you are currently reporting your DMR data electronically using eDMR,then you simply
need to continue reporting in the same way as you are now. The key change is that, starting on
December 21, 2016, electronic reporting of DMRs will be required, instead of voluntary.
• Phase 2—Starting on December 21,2020, regulated entities that are required to submit certain
other NPDES reports will begin submitting these reports electronically, instead of on paper.
Reports covered in the second phase include Notices of Intent to discharge in compliance with an
NPDES general permit,Sewer Overflow/Bypass Event Reports, and a number of other NPDES
program reports.
For more information on EPA's NPDES Electronic Reporting Rule,visit
http://www2.epa.gov/compliance/final-national-pollutant-discharge-elimination-system-npdes-
electronic-reporting-rule. For more information on electronic reporting to NC DWR,visit
http://deq.nc.gov/about/divisions/water-resources/edmr/npdes-electronic-reporting or contact Vanessa
Manuel at 919-807-6392 or via email at [e-mail].
r
State of North Carolina I Environmental Quality I Water Resources
1611 Mail service Center I Raleigh,North Carolina 27699-1611
919 707 9000

Sixty Days' Notice of Minor Modification of the Subject NPDES Permit
The NPDES Electronic Reporting Rule requires authorized NPDES programs to incorporate electronic
reporting requirements into NPDES permits beginning December 21, 2015. Under the new rule,the
electronic reporting process supersedes the paper reporting process outlined in your existing permit. To
bring your permit up-to-date with the new reporting requirements,this letter serves to notify you that in
sixty days your NPDES permit will be modified to incorporate the new electronic reporting requirements.
The modification will require electronic reporting in place of paper-based reporting. Electronic reporting
will be required beginning as indicated above for Phases 1 and 2 reporting. Please attach the enclosed
NPDES Permit Standard Conditions Part III—Addendum to your permit. This permit modification becomes
effective on July 1,2016.
All other terms and conditions in the original permit remain unchanged and in full effect. This
modification is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency
dated October 15, 2007.
If any parts contained in this modification are unacceptable to you,then you have the right to file a
petition for a contested case with the Office of Administrative Hearings within thirty(30) days following
receipt of this letter. This petition must conform to the requirements of Chapter 150E of the North
Carolina General Statutes. Petitions must be timely filed with the Office of Administrative Hearings, Post
Office Drawer 11666, Raleigh, North Carolina 27604. If you do not file a petition within the required time,
the agency decision shall be final and binding. If you have questions concerning this permit modification,
please contact Tom Belnick at telephone number 919-807-6390.
Sincerely,
Jqf re,d a Po•u--a rt-
forS.Jay Zimmerman, P.G.
Enclosure: NPDES Permit Standard Conditions Part III -Addendum
Cc: NPDES File
Central Files
Vosvil'lerigtccal Office/Water Quality Program

PAT MCCRORY
C:.
GovernorDONALD R.VAN DER VAART
Secretary
Water Resources S.JAY ZIMMERMAN
ENVIRONMENTAL QUALITY
Director
RECEIVED/NCDENR/DWR
March 4, 2016 MAR 1 0 2016
CERTIFIED MAIL 7013 2630 0001 8998 4247 WQROS
RETURN RECEIPT REQUESTED MOORESVILLE REGIONAL OFFICE
Mr. Harry K. Sideris, Senior Vice President-Environmental, Health& Safety
Duke Energy
526 South Church Street
Mail Code EC3XP
Charlotte,North Carolina 28202
SUBJECT: Notice of Violation and Recommendation of Enforcement for Violations of
NCGS 143-215.1(a)—Unauthorized Discharge of Wastewater
NOV-2016-DV-0100
Duke Energy Carolinas, LLC—Plant Allen Steam Station WWTP
Gaston County
Dear Mr. Sideris:
This letter transmits a notice of violation and recommendation of enforcement for violations of the subject
general statute. Review of submitted documents and other records indicates there are unauthorized discharges
of wastewater from the area around the subject facility's coal ash basins. Please note that additional violations
may be identified should these discharges be found to have caused exceedances of water quality standards.
This letter is to advise you that the Division of Water Resources(DWR)is considering the issuance of civil
penalties to address these violations. If you have any explanation or mitigating information that you wish to
present that may be considered during the determination of any civil penalty assessment,you are requested to
present such materials to DWR within thirty(30)days of your receipt of this letter. Please send your response
to the attention of Bob Sledge at the letterhead address.
Thank you for your prompt attention to this matter. If you have any questions about this letter,please contact
me at(919) 807-6309.
Sincerely,
Jeffrey O. Poupart
Water Quality Permitting Section Chief
cc. ' Water Quality Regional Operations
NPDES Compliance/Enforcement Files
Central Files
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919-707-9000

North Carolina Department of Environmental t r . ILE
Pat McCrory Donald van derVaart
Governor Secretary
October 13, 2015
Mr.Brent Dueitt,General Manager II
Regional Stations
Duke Energy Carolinas,LLC
253 Plant Allen Road
Belmont,North Carolina 28012
Subject: Compliance Biomonitoring Inspection
Duke Energy Carolinas Allen Steam Station
NPDES Permit No.NC0004979
Gaston County
Dear Mr.Dueitt:
Enclosed is a copy of the Compliance Biomonitoring Inspection Report for the inspection conducted at the
subject facility on October 6,2015 by Mr. Wes Bell of this Office. Please inform the facility's Operator-in-
Responsible(ORC)of our findings by forwarding a copy of the enclosed report. The results of the effluent toxicity
samples collected on October 6 and 8,2015 will be forwarded to you under separate cover.
The report should be self-explanatory;however, should you have any questions concerning this report,please
do not hesitate to contact Mr.Bell at(704)235-2192,or at [e-mail].
Sincerely,
1
.-- /) ////ll
yi. Michael L.Parker,Regional Supervisor
-.�� Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources,DEQ
Enclosure:
Inspection Report
cc: MSC 1617-Central Files/Basement
Gaston County Health Department
WB
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115
Phone:[phone]\Fax:[phone]\Customer Service:1-877-623-6748
Internet:www.ncwaterquality.org
An Equal Opportunity\Affirmative Action Employer-30%Recycled/10%Post Consumer paper

United States Environmental Protection Agency
Form Approved.
EPA Washington,D.C.20460 OMB No.2040-0057
Water Compliance Inspection Report Approval expires 8-31-98
Section A:National Data System Coding(i.e.,PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 111.1 2 IS I 3 I NC0004979 111 121 15/10/06 117 18 I Q I 19 Li 201 I
21I 1 1 1 I I I I I I I I I I I I I 1 I I I I I 1 1 1 I I' r6
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA -----Reserved--------
67 I2.0 ( 70�d I 71 I„ I 72 I .LJ I 73I I I74 75J I I I I 11180
LJ Section B:Facility JData
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number)
09:40AM 15/10/06 11/03/01
Plant Allen Steam Station
NCSR 2525 Exit Time/Date Permit Expiration Date
Belmont NC 28012 01:40PM 15/10/06 15/05/31
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Michael R Gantt/ORC/704-829-2587/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
P Brent Dueitt,253 Plant Allen Rd Belmont NC 28012/General Manager 11/704-829-2400/
No
Section C:Areas Evaluated During Inspection(Check only those areas evaluated)
II Permit Flow Measurement • Operations&Maintenance II Records/Reports
Self-Monitoring Program II Sludge Handling Disposal 111 Facility Site Review II Effluent/Receiving Waters
I. Laboratory
Section D:Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Signature(s)of Inspe (s) Agency/Office/Phone and Fax Numbers Date
7
tt
Wes Bell c �: MRO WQ//704-663-1699 Ext.2192/ f 6'�A 3 /i5
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page#

NPDES yr/mo/day Inspection Type 1
31 NC0004979 111 121 15/10/06 I 1 7 18 I B'
Section D:Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Page# 2

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 10/06/2015 Inspection Type: Bioassay Compliance
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new • ❑ 0 0
application?
Is the facility as described in the permit? • 0 0 0
#Are there any special conditions for the permit? • 0 0 0
Is access to the plant site restricted to the general public? • 0 0 0
Is the inspector granted access to all areas for inspection? II 0 ❑ 0
Comment: The Division received the permit renewal package on 10/15/2014.
No chlorination is added to Outfalls 001, 003, and 004.
The last compliance evaluation inspection was performed at the facility on 11/21/2013.
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? • 0 0 0
Is all required information readily available,complete and current? • 0 0 0
Are all records maintained for 3 years(lab. reg.required 5 years)? • 0 0 0
Are analytical results consistent with data reported on DMRs? • 0 0 0
Is the chain-of-custody complete? • ❑ ❑ ❑
Dates,times and location of sampling •
Name of individual performing the sampling •
Results of analysis and calibration •
Dates of analysis •
Name of person performing analyses U
Transported COCs �
Are DMRs complete:do they include all permit parameters? • ❑ 0 0
Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ U ❑
(If the facility is=or>5 MGD permitted flow)Do they operate 24/7 with a certified operator ❑ ❑ • 0
on each shift?
Is the ORC visitation log available and current? U ❑ ❑ ❑
Is the ORC certified at grade equal to or higher than the facility classification? • ❑ ❑ ❑
Is the backup operator certified at one grade less or greater than the facility classification? • 0 0 0
Is a copy of the current NPDES permit available on site? 0 0 0
Facility has copy of previous year's Annual Report on file for review? ❑ ❑ III ❑
Page# 3

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 10/06/2015 Inspection Type: Bioassay Compliance
Record Keeping Yes No NA NE
Comment: The records reviewed during the inspection were organized and well maintained. Discharge
Monitoring Reports(DMRs)were reviewed for the period July 2014 through June 2015. No
limit violations were reported and all monitoring frequencies were correct. No discharges
were reported throughout the review period for Outfalls 002A and 002B.
Duke Energy staff perform/document dike inspections on a weekly basis and within
twenty-four hours of a two-inch or greater storm event. A third party dike inspection is also
performed on an annual basis.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? • 0 0 0
Are all other parameters(excluding field parameters)performed by a certified lab? • 0 ❑ 0
#Is the facility using a contract lab? • 0 0 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees • 0 0 ❑
Celsius)?
Incubator(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? 0 0 • 0
Incubator(BOD)set to 20.0 degrees Celsius+/-1.0 degrees? 0 0 • 0
Comment: The facility is certified to perform on-site field analyses(pH and temperature)under
laboratory certification#5134. The remaining permit-required effluent analyses are
performed by Duke Energy's Environmental Services Laboratory(Certification#248)and the
contracted services of Pace Analytical Services, Inc. (low level mercury)and ETS, Inc.
(toxicity).
The pH meter appeared to be properly calibrated and documented.
Influent Sampling Yes No NA NE
#Is composite sampling flow proportional? ❑ 0 • ❑
Is sample collected above side streams? • ❑ 0 0
Is proper volume collected? • ❑ 0 0
Is the tubing clean? ❑ 0 U ❑
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees 0 ❑ • ❑
Celsius)?
Is sampling performed according to the permit? • 0 0 ❑
Comment: The subiect permit requires grab samples at the internal Outfall 005(FGD treatment system
effluent) prior to entering the ash basin.
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? 0 0 II 0
Is sample collected below all treatment units? 111 0 0 ❑
Is proper volume collected? • ❑ ❑ 0
Is the tubing clean? 0 0 • ❑
Page# 4

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 10/06/2015 Inspection Type: Bioassay Compliance
Effluent Sampling Yes No NA NE
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees 0 0 • 0
Celsius)?
Is the facility sampling performed as required by the permit(frequency, sampling type • 0 0 0
representative)?
Comment: The subject permit requires effluent grab samples.
Operations& Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? • 0 0 0
Does the facility analyze process control parameters,for ex: MLSS, MCRT, Settleable 0 0 • 0
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment: The facility was not generating electricity at the time of the inspection. The ash basin and
FGD wastewater treatment system (WVVTS) appeared to be properly operated and well
maintained. The FGD VWVTS is connected to a computer monitoring system to assist the
on-site staff in the operation of the treatment units/processes.
An abundant population of fish was observed underneath the walkway and adjacent to the
stop log discharge tower for the ash basin treatment system.
Equalization Basins Yes No NA NE
Is the basin aerated? ❑ ❑ ❑
Is the basin free of bypass lines or structures to the natural environment? 0 0 0
Is the basin free of excessive grease? • 0 0 0
Are all pumps present? • 0 ❑ ❑
Are all pumps operable? • 0 0 0
Are float controls operable? • 0 0 ❑
Are audible and visual alarms operable? 0 0 • 0
#Is basin size/volume adequate? • 0 0 0
Comment:
Chemical Feed Yes No NA NE
Is containment adequate? • 0 0 0
Is storage adequate? • 0 0 0
Are backup pumps available? • 0 0 0
Is the site free of excessive leaking? • ❑ 0 0
Comment:
Secondary Clarifier Yes No NA NE
Page# 5

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 10/06/2015 Inspection Type: Bioassay Compliance
Secondary Clarifier Yes No NA NE
Is the clarifier free of black and odorous wastewater? • 0 0 0
Is the site free of excessive buildup of solids in center well of circular clarifier? • 0 0 0
Are weirs level? • ❑ 0 0
Is the site free of weir blockage? 111000
Is the site free of evidence of short-circuiting? • 0 0 0
Is scum removal adequate? • 0 ❑ 0
Is the site free of excessive floating sludge? • 0 0 0
Is the drive unit operational? • 0 0 0
Is the return rate acceptable(low turbulence)? • 0 0 0
Is the overflow clear of excessive solids/pin floc? • 0 0 0
Is the sludge blanket level acceptable?(Approximately'/+of the sidewall depth) 0 0 0
Comment:
Flow Measurement- Influent Yes No NA NE
#Is flow meter used for reporting? • 0 0 0
Is flow meter calibrated annually? • 0 0 0
Is the flow meter operational? • 0 0 0
(If units are separated)Does the chart recorder match the flow meter? 0 0 • 0
Comment: The FGD VWVfS effluent is measured by an in-line flow meter. The flow meter is
calibrated/verified annually and was calibrated/verified on 5/10/2015 by the on-site
wastewater staff.
Solids Handling Equipment Yes No NA NE
Is the equipment operational? • 0 0 0
Is the chemical feed equipment operational? 111 ❑ 0 0
Is storage adequate? NI 0 0 0
Is the site free of high level of solids in filtrate from filter presses or vacuum filters? 0 0 0 •
Is the site free of sludge buildup on belts and/or rollers of filter press? 0 0 0 III
Is the site free of excessive moisture in belt filter press sludge cake? 0 0 0 •
The facility has an approved sludge management plan? 0 0 ❑
Comment: The FGD VWVfS is equipped with three operational filter presses; however, these units
were not in service at the time of the inspection. The dewatered sludge is transported to the
on-site landfill equipped with a liner and leachate collection system.
The dry ash and sluiced ash(removed from the ash basin treatment system)are also
disposed into the on-site landfill.The gypsum material from the FGD system is reused by an
outside company(National Gypsum)in the dry wall market.
Page# 6

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 10/06/2015 Inspection Type: Bioassay Compliance
Solids Handling Equipment Yes No NA NE
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? 0 0 • 0
Is flow meter calibrated annually? ❑ ❑ • ❑
Is the flow meter operational? ❑ ❑ • ❑
(If units are separated)Does the chart recorder match the flow meter? ❑ ❑ ❑
Comment: Flow measurements for Outfalls 001, 003, and 004 are based on pump curves/logs. Outfall
002 discharges are measured by a staff guage/ultrasonic level indicator and weir. The ORC
verifies the Outfall 002 flow measurement system annually(at a minimum)and the flow
measurement system was last verified on 2/10/2015.
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? MIDEID
Are the receiving water free of foam other than trace amounts and other debris? • 0 0 ❑
If effluent (diffuser pipes are required) are they operating properly? ❑ 0 • ❑
Comment: No discharges were observed from Outfalls 002A, 002B, and 005 (internal)at the time of the
inspection. The effluents from Outfalls 001, 003, and 004 were the same as the receiving
stream (turbid)due to the previous rainfall events that had occurred in the upstream
drainage basins.
Outfall 002 effluent was clear with no floatable solids or foam. The receiving stream did not
appear to be negatively impacted. DWR staff split effluent chronic toxicity samples with the
facility on 10/6/2015 and 10/8/2015. The results will be forwarded under separate cover.
Page# 7

DUKE
Allen Steam Statkon
253 Plant Allen Road
ENERGY, Belmont NC 28012
CAROLINAS
December 29, 2015 RECEIVED/NCDENR/DWR
North Carolina Department of Environment and Natural Resources JAN 1 2 2016
Division of Water Resources
WQROS
information Processing Unit MOORESVILLE REGIONAL OFFICE
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Duke Energy Carolinas, LLC
Allen Steam Station (NPDES Permit NC0004979)
Groundwater Quality Monitoring: Compliance Report Form Submittal
Enclosed is the completed Compliance Report Form (GW 59CCR)for the submittal of the November
2015 groundwater monitoring data from the Allen Steam Station ash basin sampling locations.
As required by the form, results for parameters exceeding the generic standard published in 15A NCAC
02L.0202 (g-h) have been bolded. Per 15A NCAC 02L.0202 (b),where naturally occurring substances
exceed the generic standards,the comparative 2L standard shall be determined by the Director.
Reported values are dependent on the accuracy of the approved analytical methods used.
If you have any question regarding this report, please contact Sean DeNeale at 704 382 4761 or
Sean,DeNeale(aduke-energy.com.
Sincerely,
AY141 6-010-24"6--
Sean DeNeale
Waste and Groundwater Programs
cc: Debra Watts
Eric Smith
Brent Dueitt,Allen Steam Station
Randy Gantt,Allen Steam Station
Erika Tuchbaum
Don Scruggs
Catherine Butler
Ed Sullivan

Pr GROUNDWATER QUALITY MONITORING
COMPLIANCE REPORT FORM os aARi7aEwf oc EfivititirriiuefaTaCoiintm
FACILITY INFORMATION Please Print dearly or Type 16Y7A4/41LtEBYlCEA�EB,)ytlEtGti,NC 2769A 1�17; orje:(�1�}7;,g�221,.,_. :.,,i,w.
Facility Name: Allen Steam Station
Permit Name(if different): Duke Energy Carolinas,LLC Permit Type: NPDES Expiration Date: I S/31/2015 I
Facility Address: 253 Plant Allen Road PERMIT Number: NC0004979
(Street) TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater a -t
Belmont I NC I 28012 ) County I Gaston I I Po I EC�_.I t---r; Nor)
(City) (State) (ZIP) R
Contact Person: Sean DeNeale Telephone" I 704-382-4761 ,a �;�I"1
Well Location/Site Name: Allen Ash Basin No,of wells to be sampled: 13
Orlit '�:n�i^b°f'..�?� ..;Y,r .zy ':::i t �•r'�x y.• y;'<'_-�:.c' . , �''�r •,v. - r
(from emit)
.r r
_$D�11�'aA/ _
,. ,` .'n., .:..� ,.i• ,a'.`. ". Y ?i� ,,�• �„' !: . f a�+f� 4�r��I�gcc#
. .. Ttt�tlryt�. t,;, �' " ,� �" �i'. �;,5.'.�«`.,!.,.,e� n��`�. ` . = s�• ems :
Well ID Number(From Permit) -ICE
Units AB-1R AB-45 AB4D AB-11D AB-125 AB•120 AB-135 AB-13D AB-14D AB-95• A11-90• AB-105• AB-100 MW- MW- MW- MW-_.
Well Depth(ft below land surface) ft 70.89 22.38 49.99 20.53 23.58 96.53 21.97 72.20 29.45 21.01 115.23 18.41 62.44 MW
Measuring Point(roc)(ft above land surface) ft 2.29 2.52 2.19 2.68 2.05 2.04 2.74 2.65 2.44 2.19 2.35 2.44 2.56
Well Diameter in 2.0 2.0 2.0 2.0, 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
Screen Top(ft below land surface) ft 60.89 7.38 44.99 15.53 8.58 91,53 6.97 67.20 24.45 6.01 110.23 3.41 57.44
Screen Bottom(ft below land surface( ft 70.89 22.38 49.99
Relative Measuring Point Elevation ft 675 86 650 46 64g 17 8 03 5 3 21.97 72.20 43 85 82.73 115.238 75.01 74.97
3.58
�, th��--W ,,-:: : 4• -.:, r .r,,• •,F,, ., .,.. `. ' k � 65 .75 648.72 648 54 643.80 582 73 582.72 575.05 574.97
1.69 651
.. 1. • itkilliUgl l�Y .,tax tY.',p1'.7.Z,44.i(4 1:: :.yJ+•Hy fi �,:; y..: cr<'t'%.t .:..t.:r- L i.Y ,y '�i�Y, 1r %:r C=•b•y ,. ..
#T k-K"�iii.Y..� div. .dU'%+ANX.•',y -,:s.<yy,r.�:'-.� iv+`:�wr3,�� H+K,.n{... �:��? l
CHECK IF DRY WELL AT TIME OF SAMPLING 0 oriy 0 DRY 0 DRY 0 DRY 0 DRY 0 DRY 0 DRY 0 DRY 0 DRY 0 DRY 0 DRY 0 DRY 0 DRY 0 DRY ❑DRY 0 my 0 DRY D DRY
-
I 15A-2L Units AB-1R AB-45 A840 AB-11D AB-12S AB-120 AB-135 AB-13D AB-140 4B-95• AB-90• AB-105• A8-100• MW- MW- MW- MW- MW-
Sample Date 11/06/2015 11/06/2015 11/06/2015 11/06/2015 11/06/2015 11/06/2015 11/06/2015 11/06/2015 11/06/2015 11/06/2015 11/06/2015 11/06/2015 11/06/2015
Volume of Water pumped/balled gal 1.95 4.95 25.30 5.20 2.70, 18.75 7.50 2.95 4.45 3.75 3.85 3.00 7.55
Temperature(00010) deg-C 16.6 17.4 16.3 17.0 16.1 15.8 17.6 17.7 16.4 20.9 18.7 17.9 16.7
Odor(00085) None None None None None None None None None None None None None
Appearance Normal Normal Norma) Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal
Turbidity(82078) NTU 2.95 9.16 1.89 8.13 8.75 6.82 4.32 41.6 9.16 4.47 7.78 9.78 11.5
Dissolved Oxygen(00300) mg/L 7.91 1.29 4 2.05 3.12 4.89 1.26 2.36 2.54 0.23 0.25 0.66 0.15
Oddation Reduction Potential(00090) mV 356 396 441 363 444 389 397 355 421 206 257 309 311
Specific Cond-Held(00094) _umhos/cm 300 132 131 115 24 157 94 147 127 244 255 176 158
Water Level(ft below measuring pt.)(82546) ft 55.98 13.81 12.61 9.39 15.43 14.62 10.71 11.34 16.37 11.16 13.37 7.63 7.7
H field 00400 6.5.8.5 SU ' 6.5 6.0 6.0 6.0
art�``• `i:'''l ,tt " - « .,,.3;.�i; .d ..: .:.- .d''5.:-"" .11 = >�41• "✓'�z`s•+�e . ..�.:: Y. . _.•.. = i'kw..,,,,, t r'Y •^r L1r-.- y 6.4 5.7 � 6.4 5.5 6.5 6.9 6.2 6.3
. ., :.:,,. ._ . .,,..-... -��-f. -.f_ti. .,..•.•:..a^tit�:..%''�t .��.fn_ ...::.Jrtie,,.:•.i t� .f•z ��'`� r` 7 rg;' Pyy^ _�J+e.c
Laboratory Name Duke Energy Analytical Laboratory .,.-•-•:.-,. -�.r., ..-s, ,:Samples forme is we o SZ;xz*+.:.•:rxY Yes ..-...,,;s.A._..,..: .....
Sample Analysis Date November 6.10,2015 Certification/I NC DENR"248 for metals were collected unfiltered: 0 ❑ No
and field acidified: 0 Yes O No
!MAC' 15A-2L Units AB-1R AB-45 AB-40 AB-11D AB•125 AB-120 AB-135 AB-13D AB•14D AB-9S• AB-90• AB•10S• A8-100• MW- MW-
TOS-Total 01ss.5olds(70300) - 500 mg/I 210 42 110 91 25 120 72 140 110 130 180 97 140 MW MW- MW-
d-Chloride(00940) - 250 mg/I 0.99 3.9 5.7 5.8 2.8 4.8 9.2 6.8 7.8 8.9 8.5 11 8
As-Arsenic(01002) - 10 ug/I <1 <1 <1 <L <1 <1 <1 <1 ci <1 <1 <1 <1
504-Sulfate(00945) - 250 mg/I 89 12 2.7 0.49 0.12 4.9 0.9 0.79 12 37 43 19 22
Nitrate(NO3)as N 100620) - _ 10 mg/I 0.08 3.2, 2.6 0.05 0.05 1.9 2.2 1.7 0.64 <0.023 0.05 0.06 <0.023
Cd-Cadmium(1027) - - 2 ug/I <1 <1 <1 <1` <1 <1 <1 <1 <1 <1 <1 <1 <1
Cr-Chromium(01034) - 10 ug/1 <5 <5 7 <5 <5 <5 <5 <5 <5 <5 <5 <5 6
Cu-Copper(01042) - 1 mg/i <0.005 <0.005 0.015 <0.005 <0.005 <0.005 <0.005 <0.005 0.049 <0.005 <0,005 <0.005 <0,005
Fe-Iron(01045) - 300 ugh 133 414 19 235 549 241 204 1950 247 7010 424 650 652
Hg•Mercury(71900) - 1 VI <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <o,os <o,os" coos <0.05 <O.os <0.05
Mn-Manganese(01055) - so ugh 7 5 <5 <5 53 6 21 43 S2 9420 22 499 18
NI-Niticel(01067) - 100 ug/1 <5 <5 5 <5 <5 <5 <5 <5 160 <5 <5
Pb•Lead(01051) - 15 <5 <5
tg/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
Zn-Zinc(010921_ - _ 1 mg/I <0.005 <0.005 0.009 <0.005 <0.005 c0.005 0.01 0.006 <0.005 <0.005 <0.005 <0.005 <0.005
Bs-Barium(01007J - 700 ug/I 56 33 30 41 41 48 42 65 69 168 29 49 38
B-Boron(01022) - 700 ug/I <50 <50 <50 <50 <50 <50 <50 <50 <50 684 552 <5o <50
TI-Thallium(01059) 0.2 NE WI <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2
Sb-Antimony(01097) 1 NE ug/I 1.1 1.07 1.04 1.11 c1 <1 1.05 1.24 <1 1.0$ 1,07 1.05 <1
Se-Selenium(01147) - 20 ug/I <1 <1 <1 <i c1 <1 <1 <1 <1 <1 2.4 c1 <1
Alkalinity•(00410) - NE mg/I 49.9 28.7 39.7 46.8 <5 61.2 17.4 52.6 18.4 58.7 62 43.4 38.1
Al-Aluminum(01105) - NE ug/1 139 494, 12 329 609- 235 159 1810 296 64 397 545 607
Be-Beryllium(01012) 4 NE ug/I <1 <1 <1 <1 <1, <i <1 <1 <1 <1 <1 <1 <1
HCO3-Bicarbonate(00440) - NE mg/I 49.9 I8.7 39.7 46.8 <5 61.2 17.4 52.6 18.4 58.7 62 43.4 38.1
Ca•Caldum(00916) - NE mg/I 38 7.97, 12 8.61 0.256 16.3 5.69 14 5.13 11.3 28 11 14,6
CO3-Carbonate(00445) - NE mg/I 6 <5 <5 <5 <5 <5 <5 <5 c5 <5 <5 <5 <5
Co-Cobalt(01037) 1 NE ng/1 <1 <1 <1 c1 <1 <1 <1 1 18.2 7.86 <1 1.61 c1
Mg-Magnesium(00927) - NE mg/I 7.43 5.11 3.44 3.14 1.08 4.37 3 4.2 2.12 6.04 6.44 5.2 3.6
Mo-Molybdenum(01062) - NE ug/I <1 1.04 <I <1 <1 <1 <1 <1 8.01 <1 <1 <1 <1
K-Potassium(00937) - NE mg/1 2.24 5.61 1.5 2.46 0.92 2.4Z 1.25 2.28 1.74 1.1 2.32 1.59 1.52
Na-Sodium(82035) - NE mg/I 7.44 5.59 7.25 8.8 2.21 7.48 5.29 9.55 13.4 11 11.1 13.2 9.22
TSS-Total Susp.Solids 1700311 - NE mg/I <5 <5 <5 <5 21 8 <5 37 8 <5 8 12 <5
V-Vanadium(01087) 0.3 NE ug/I 2.51 1.41 4.17 2.22 1.19 3.95_ 1.34 11.4 0.89 <0.3 7.25 1.27 6.62
Sr-Strontium(01082) - NE mg/I 0.398 0.041 0.176 0.116 <0.005 0.177 0.053 0.195 0.078 0.147 0,:1 0.16 0.184
NE.Not Estabashed BOLD values equal or exceed the corresponding 2L Standard Turbidity Is field boatyard for information use only.
Notes.'Win b located inside of the estabeshed compliance boundary
certify that.to the best of my knowledge and belief,the elimination submdted in this report i5 true,accurate,and complete,and that the laboratory anayticai data-was produced using :.rived methods of analysis by a.DWD-certified laboratory - tam aware plat:inere.are. n"icant penalties
and imprisonment for knowing violations. for submitting false information. the- _ 9 possibility of fines
sip
P.Brent Dueitt/GM II Carolinas West/Plant Allen • f 1/ ; ' :r le-
p�`�/,t/�1
Permlttee(or Authorized Agent)Name and Title-Please print or type Signature of Permittee(or Authorized Agent)
Date
GW-59CCR 09/2015 1-The IMACs were Issued in 2010,2011,and 2012;however NCDEQ has not established
a 2L for these constituents as described In 15A NCAC 02L0202(c).For this reason,
IMACs noted on the report are for reference only.

Division of Water Resources
November 19,2015
IsEMQ 3RvM
To: Michael Parker
Water Quality Regional Operations,MRO
Through: Cindy A.Moore
Supervisor,Aquatic Toxicology Branch(ATB)
r
From: Carol Hollenkamp
Quality Assurance f cer,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(7Q 10 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
Test Concentrations 20%
Test Result Pass
Control Survival 92%
Control Mean Reproduction 23.25 neonates
Test Treatment Survival 92%
Treatment Mean Reproduction 23.0 neonates
First Sample pH 7.21 SU
First Sample Conductivity 306 micromhos/cm
First Sample Total Residual Chlorine <0.10 mg/L
Second Sample pH 7.23 SU
Second Sample Conductivity 309 micromhos/cm
Second Sample Total Residual Chlorine <0.10 mg/L
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(MRO)
Aquatic Toxicology Branch Water Sciences Section

Bell, Wes
From: Hollenkamp, Carol
Sent: Thursday, November 19, 2015 1:22 PM
To: Parker, Michael
Cc: Bell,Wes; Moore, Cindy
Subject: Toxicity Test Reports
Attachments: Duke Allen Steam Station_1015.pdf; Duke Marshall Steam Station_1115.pdf
Attached are the toxicity test reports for Duke Energy Allen and Marshall Steam Stations. If you have any questions,
please let me know.
Thanks,
Carol Hollenkamp
Environmental Specialist
Aquatic Toxicology Branch/Water Sciences Section/Division of Water Resources
Department of Environmental Quality
919-743-8440 office
[e-mail]
Mailing: 1623 Mail Services Center, Raleigh, NC 27699-1623
Physical: 4401 Reedy Creek Road, Raleigh, NC 27607
-'7 "?* othinq Compares
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
1

Bell, Wes
From: Gantt, Michael R <[e-mail]>
Sent: Tuesday,October 13, 2015 8:22 AM
To: Bell,Wes
Subject: RE:Allen FGD WWTS Effluent Flow Calibration
Wes: Per talking with Robbin Jolly, FGD Supervisor,the FGD WWTS operators perform the calibration task and the
results are reviewed by Robbin and another person. If the results are"out of reason"then the flow meter is replaced.
Randy Gantt
From: Bell, Wes [mailto:[e-mail]]
Sent: Monday, October 12, 2015 1:08 PM
To: Gantt, Michael R
Subject: RE: Allen FGD WWTS Effluent Flow Calibration
*** Exercise caution. This is an EXTERNAL email. DO NOT open attachments or click links from
unknown senders or unexpected email. **'k
Thanks for the information. Does the Electrical & Instrumentation Group do the calibration?
Wes
From:Gantt, Michael R [mailto:[e-mail]1
Sent: Friday,October 09,2015 10:43 AM
To: Bell,Wes<[e-mail]>
Subject:Allen FGD WWTS Effluent Flow Calibration
Wes:Attached is information that you requested as to how we document the calibrations on the FGD WWTS discharge
flow for outfall 005. An etrac task is generated annually to notify the calibration needs to take place. The etrac system
is an internal computer based system, in which use to notify the necessary individual of various tasks that need to be
performed. The notification for the etrac task goes to Robbin Jolly(FGD Supervisor)and she sees to it the calibration
gets completed. I have enclosed the 2015 calibration log which was performed on 3/10/15. I have also enclosed a copy
of the etrac task that serves as a notification the perform this task annually. The task has completion comments. Once
this task is completed,the etrac system will automatically set up the task to be performed at the next scheduled time
interval(2016).
The data for this and previous calibrations is stored in our computer files. I only sent you the 2015 one, but if want to
see previous years calibrations I can copy and send also. If you have any more questions let me know.
Randy Gantt
Sr. Environmental Specialist
Duke Energy Carolinas
Allen Steam Station
1

C D'JE Allen Steam Station
253 lant NC80
Allen
Road
EI RG I Belmont,704-829-2350
CAROLINAS 704-829-2370(fax)
December 15, 2014
North Carolina Department of Environment and Natural Resources RECp �/'1 ,eD
Division of Water Resources
Information Processing Unit DF'' 2 2 /014
1617 Mail Service Center INF DwRSEG71
Raleigh, North Carolina 27699-1617 �RMATIONarg
pRocr„,,caoiNG
Subject: Duke Energy Carolinas, LLC
Allen Steam Station (NPDES Permit NC0004979)
Groundwater Quality Monitoring: Compliance Report Form Submittal
Enclosed is the completed Compliance Report Form (GW-59CCR)for the submittal of the November
2014 groundwater monitoring data from the Marshall Steam Station ash basin sampling locations.
As required by the form, results for parameters exceeding the generic standard published in 15A NCAC
02L.0202 (g-h) have been bolded. Per 15A NCAC 02L.0202 (b),where naturally-occurring substances
exceed the generic standards,the comparative 2L standard shall be determined by the Director.
Reported values are dependent on the accuracy of the approved analytical methods used.
If you have any question regarding this report, please contact Mr.Steve Cahoon at 919-546-7457 or
[e-mail].
Sincerely
Steve Cahoon
Water Programs
Cc: Debra Watts
BC w/: Tracy Callan
Eric Culbert
Mike Shrader
Don Scruggs,Allen Steam Station
Eric Matthews,Allen Steam Station
Record Number: 8-11
Record Type Code: ENV-50-02

GROUNDWATER QUALITY MONITORING: Mail original DEPARTMENT OF ENVIRONMENT&NATURAL RESOURCES
COMPLIANCE REPORT FORM and 1 copy DIVISION OF WATER QUALITY-INFORMATION PROCESSING UNIT
a_a.. ..y _ to: 1617 MAIL SERVICE CENTER,RALEIGH,NC 27699-1617 Phone:[phone],2
FACILITY iNFORMATION Please Print Clearly or Type
Facility Name: Allen Steam Station Permit Type: NPDES Expiration Date: 5/31/2015
Permit Name(if different): Duke Energy Carolinas,LLC PERMIT Number: NC0004979
Facility Address: 253 Plant Allen Road
(Street) TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
Belmont I NC I 28012 County Gaston
(City) (State) (Zip)
Contact Person: Steve Cahoon Telephone# [ 919-546-7457
Well Location/Site Name: Allen Ash Basin No.of wells to be sampled: 13
(from Permit)
Monitoring Well Construction Information
Well ID Number(From Permit)
Units AB-1R A8-45 AB-4D _ AB-11D AB-125 AB-12D AB-135 AB-13D AB-14D MW- MW- MW- 1 MW- MW- MW- MW- MW- MW-
Well Depth [ft below land surface] ft 70.89 22.38 49.99 20.53 23.58 96.53 21.97 72.20 29.45
Measuring Point(toc)[ft above land surface] ft 2.29 2.52 2.19 2.68 2.05 2.04 2.74 2.65 2.44
Well Diameter in 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 _ _
Screen Top [ft below land surface] ft 60.89 7.38 44.99 15.53 8.58 91.53_ 6.97 67.20 24.45 _ _
Screen Bottom [ft below land surface] ft 70.89 22.38 49.99 20.53 23.58 96.53 21.97 72.20 29.45
Relative Measuring Point Elevation ft 675.86 650.46 649.17 618.07 651.69 651.75 648.72 648.54 641.80
Sampling Information and Field Analysis
CHECK IF DRY WELL AT TIME OF SAMPLING [I] DRY ❑ DRY ❑ DRY ❑ DRY ElDRY ❑ DRY ❑ DRY ❑ DRY II] DRY ❑ DRY ❑ DRY fill DRY ❑ DRY ❑ DRY ❑ DRY ❑ DRY ❑ DRY ❑ DRY
15A-2L Units AB-1R AB-45 AB-4D AB-11D AB-125 AB-12D AB-135 AB-13D AB-14D MW- MW- MW- MW- MW- MW- MW- MW- MW-
Sample Date 11/04/2014 11/04/2014 11/04/2014 11/04/2014 11/04/2014 11/04/2014 11/04/2014 11/04/2014 11/04/2014
Water Level[ft below measuring pt.](82546) ft 54.24 13.65 12.23 9.05 15.70 14.65 12.06 11.75 16.95
Volume of Water pumped/bailed gal 2.70 8.00 20.25 3.95 1.85 15.60 0.75 0.80 10.00
Temperature(00010) deg.C 16.2 16.9 16.2 15.9 15.5 15.7 17.0 17.2 16.2
Odor(00085) None None None None None None None None None
Appearance Normal Normal Normal Normal Normal Normal Normal Normal Normal
Turbidity(82078) NTU 2.9 7.8 2.0 11.7 5.6 2.7 6.7 1.9 5.8
Dissoved Oxygen(00300) mg/L 8.2 1.7 4.0 1.1 0.8 4.7 2.0 2.2 3.0
Oxidation Reduction Potential(00090) mV 448 346 389 388 422 370 487 438 408
Specific Cond-field(00094) umhos/cm 304 152 127 115 26 156 81 154 139
pH-field(00400) 6.5-8.5 SU 6.4 6.1 5.9 5.9 5.0 6.4 5.5 6.3 5.4
Laboratory Information
Laboratory Name Duke Energy Analytical Laboratory Certification# Samples for metals were collected unfiltered: 0 Yes ❑ No
Sample Analysis Date NC DENR#248 and field acidified: 0 Yes ❑ No
15A-2L Units AB-1R AB-45 AB-4D AB-11D AB-12S AB-12D AB-135 AB-13D AB-14D MW- MW- MW- MW- MW- MW- MW- MW- i MW-
Sb-Antimony(01097) 1 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
As-Arsenic(01002) 10 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
Ba-Barium(01007) 700 ug/I 71 28 28 40 35 44 35 40 75
B-Boron(01022) 700 ug/I <50 <50 <50 <50 <50 <50 <50 <50 67
Cd-Cadmium(01027) 2 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
CI-Chloride(00940) 250 mg/I 1 4.7 6.9 5.1 3.1 4.9 9.3 9.4 9.3
Cr-Chromium(01034) 10 ug/I <5 <5 <5 <5 <5 <5 <5 <5 <5
Cu-Copper(01042) 1 mg/I <0.005 <0.005 0.015 <0.005 <0.005 <0.005 <0.005 <0.005 0.051
Fe-Iron(01045) 300 ug/I 55 472 12 406 136 82 280 <10 600
Pb-Lead(01051) 15 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
Mn-Manganese(01055) 50 ug/I 10 309 <5 <5 49 <5 23 <5 50
Hg-Mercury(71900) 1 ug/I <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
Ni-Nickel(01067) 100 ug/I <5 <5 <5 <5 <5 <5 <5 <5 92
Nitrate(NO3)as N(00620) 10 mg/I 0.18 0.7 2.1 0.05 0.06 1.9 2.3 2.2 3.4
Se-Selenium(01147) 20 ug/I 2.41 <1 <1 <1 <1 <1 <1 <1 <1
SO4-Sulfate(00945) 250 mg/I 110 11 4.7 0.41 0.17 5.1 0.19 0.89 16
TI-Thallium(01059) 0.2 ug/l <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2
TDS-Total Diss.Solids(70300) 500 mg/I 230 90 100 91 <25 120 63 130 95
Zn-Zinc(01092) 1 mg/I 0.005 <0.005 0.017 <0.005 0.005 <0.005 0.01 <0.005 0.009
Al-Aluminum(01105) --- ug/I NA NA NA NA NA NA NA NA NA
Turbidity is field analyzed for information use only.
BOLD values equal or exceed the corresponding 2L standard Notes:
1 certify that,to the best of my knowledge and belief,the information submitted in this report is true,accurate,and complete,and that the laboratory analytical data was produced using approved methods of analysis by a DWQ-certified laboratory. 1 am aware that there are significant penalties for submitting false information,including the
possibility of fines and imprisonment for knowing violations.
Eric Matthews/ GM II-PG Carolinas West/Plant Allen v� /}gy p ¢,Hj> 12`(o 1]4
Permittee(or Authorized Agent)Name and Title-Please print or type Signatur of Permittee(or Authorized Agent) Date
GW-59CCR 06/2014

Bell, Wes
From: Scruggs, Don [[e-mail]]
Sent: Friday, September 05, 2014 4:29 PM
To: Bell, Wes
Cc: Matthews, Eric; Allen, Jason M; Cahoon, Steve; Callan, Tracy A
Subject: Allen Oil Spill Follow Up
—2-11 c.— 20/q C /9-77
Mr. Bell,
Allen Steam Station discovered a slight sheen on the Catawba River at the station intake on September 2, 2014. Source
of leak was identified as Unit 3A hydraulic coupling cooler which discharges into NPDES Outfall 004. Conditions in Lake
Wylie allowed discharge from Outfall 004 to recirculate upstream to the station intake area where sheen was observed.
The cooler was isolated,the heads removed and a small leak was identified and plugged. On September 3,an
inspection of NPDES Outfall 004 revealed no sheen. The sheen at station intake had mostly dissipated and was much
less visible. On September 4,Outfall 004 was inspected again and a slight sheen was observed. We suspect the
additional sheen was caused by fluctuating water levels in the discharge pipe flushing out some residual hydraulic oil. A
containment boom was deployed with an absorbent boom inside the containment at discharge of Outfall 004. The
National Response Center and NCDENR were notified on September 2. NCDENR was notified by voicemail. I reported
to you on September 3 that less than 1 pint was released. We are revising that estimate to less than 1 gallon of
hydraulic oil released.
If you have any additional questions feel free to contact me at 704 400-3005.
Thanks,
Vaa Seiteves
Environmental Field Support
Allen Steam Station
704 829-2423 Office
704 400-3005 Cell
1

� �ERGY AUG 252014
Allen Steam Station
253 Plant Allen Rd,.,
Belmont, NC 28012
704 829-2423
August 11, 2014
State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources �������
Information Processing Unit R
1617 Mail Service Center
Raleigh, North Carolina 27699-1617 AUG 2 O:1;1iO4iv
Subject: Duke Energy Carolinas LLC—Allen Steam Station WATER QUHu r
Groundwater Quality Monitoring—Compliance Report Form INFORMATION PR(1(`csSiNG l iNr�
Please find attached the completed Groundwater Compliance Report Form (GW-59CCR)for Allen Steam Station's
Ash Basin (NPDES Permit#NC0004979). Please note that this form has been revised as requested to include
turbidity,dissolved oxygen and oxidation reduction potential results.
Predictive modeling compliance calculations derived for monitoring wells AB-9S, AB-9D, AB-10S, and AB-10D will be
included in the annual modeling report.
As required by the GW-59CCR form, parameters exceeding the generic standards published at 15A NCAC
02L.0202(g-h) have been bolded. However, per 15A NCAC 02L.0202(b), where naturally occurring substances
exceed the generic standards, the appropriate 2L standard shall be the naturally occurring concentration as
determined by the Director.
All values reported on the attached reports are dependent on the accuracy of approved analytical methods used to
measure parameters.
Should you have questions regarding this report, please contact me at [phone].
Sincerely,
Allen Stowe
Water& Natural Resources
cc: Debra Watts
Attachments

OUNDWATER QUALITY MONITORING:opo
Mail original DEPARTMENT OF ENVIRONMENT&NATURAL RESOURCES
COMPLIANCE REPORT FORM and 1 CopY DIVISION OF WATER QUALITY-INFORMATION PROCESSING UNIT
to: 1617 MAIL SERVICE CENTER,RALEIGH,NC 27699-1617 Phone:[phone]
FACILITY INFORMATION Please Print Clearly or Type
Facility Name: Allen Steam Station Permit Type: NPDES Expiration Date: 5/31/2015
Permit Name(if different): Duke Energy Carolinas,LLC PERMIT Number: NC0004979
Facility Address: 253 Plant Allen Road
(Street) TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
Belmont NC 28012 County Gaston
(City) (State) (Zip)
Contact Person: Allen Stowe Telephone# I 704-382-4309
Well Location/Site Name: Allen Ash Basin No.of wells to be sampled: 13
(from Permit)
Monitoring Well Construction Information
Well ID Number(From Permit)
Units AB-1R AB-4S AB-4D AB-11D AB-125 AB-12D AB-13S AB-13D AB-14D MW- MW- MW- MW- MW- MW- MW- MW- MW-
Well Depth [ft below land surface] ft 70.89 22.38 49.99 20.53 23.58 96.53 21.97 72.20 29.45
Measuring Point(toc)[ft above land surface] ft 2.29 2.52 2.19 2.68 2.05 2.04 2.74 2.65 2.44
Well Diameter in 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
Screen Top [ft below land surface] ft 60.89 7.38 44.99 15.53 8.58 91.53 6.97 67.20 24.45 _
Screen Bottom [ft below land surface] ft 70.89 22.38 49.99 20.53 23.58 96.53 21.97 72.20 29.45
Relative Measuring Point Elevation ft _ 675.86 650.46 649.17 618.07 651.69 651.75 648.72 648.54 641.80
Sampling Information and Field Analysis _ _ _
CHECK IF DRY WELL AT TIME OF SAMPLING El DRY III DRY ❑ DRY ❑ DRY ❑ DRY ❑ DRY El DRY ❑ DRY ❑ DRY ❑ DRY 11 DRY ❑ DRY 11DRY ElDRY ❑ DRY ElDRY ❑ DRY IIDRY
15A-2L Units AB-1R AB-45 AB-4D AB-11D AB-125 AB-12D AB-13S AB-13D AB-14D MW- MW- MW- MW- MW- MW- MW- MW- MW-
Sample Date 07/07/2014 07/07/2014 07/07/2014 07/07/2014 07/07/2014 07/07/2014 07/07/2014 07/07/2014 07/07/2014
Water Level[ft below measuring pt.](82546) ft 53.78 11.13 9.63 8.00 14.32 12.46 9.33 9.23 15.79
Volume of Water pumped/bailed gal 2.50 1.30 10.30 7.22 15.80 3.59 9.50 5.16 3.59 _
Temperature(00010) deg.C 16.7 16.1 16.7 16.1 15.6 15.9 21.3 19.6 16.1
Odor(00085) None None None None None None None None None,
Appearance Normal Normal Normal Normal Normal Normal Normal Normal Normal
Turbidity(82078) NTU 3.6 9.9 5.6 10.3 15.8 7.2 9.5 3.6 5.2
Dissoved Oxygen(00300) mg/L 8.0 0.1 3.8 0.6 2.2 5.0 2.3 1.7 2.5
Oxidation Reduction Potential(00090) mV 470 305 340 346 390 331 478 445 375
Specific Cond-field(00094) umhos/cm 230 139 130 114 26 151 88 161 146 _
pH-field(00400) 6.5-8.5 SU 6.2 6.1 5.9 5.8 4.9 6.4 5.5 6.1 5.3
Laboratory Information
Laboratory Name Duke Energy Analytical Laboratory Certification# Samples for metals were collected unfiltered: 0 Yes ❑ No
NC DENR#248
Sample Analysis Date July 8-24,2014 and field acidified: Q Yes ❑ No
15A-2L Units AB-1R 1 AB-45 AB-4D AB-11D AB-125 AB-12D AB-135 AB-13D AB-14D MW- MW- MW- MW- MW- MW- MW- MW- MW-
Sb-Antimony(01097) 1 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
As-Arsenic(01002) 10 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
Ba-Barium(01007) 700 ug/I 73 29 30 43 40 45 36 46 73
B-Boron(01022) 700 ug/I <50 <50 <50 <50 <50 <50 <50 <50 82
Cd-Cadmium(01027) 2 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
CI-Chloride(00940) 250 mg/I 0.97 3.3 6.7 4.4 2.8 4.2 8.2 9.2 9.5
Cr-Chromium(01034) 10 ug/I <5 <5 <5 <5 <5 <5 <5 <5 <5
Cu-Copper(01042) 1 mg/I <0.005 <0.005 0.019 <0.005 <0.005 <0.005 <0.005 <0.005 0.054
Fe-Iron(01045) 300 ug/I 125 378 23 108 573 128 553 134 206 _
Pb-Lead(01051) 15 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
Mn-Manganese(01055) 50 ug/I 14 201 <5 <5 56 <5 49 6 39
Hg-Mercury(71900) 1 ug/I <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05, <0.05 <0.05
Ni-Nickel(01067) 100 ug/I <5 <5 5 <5 <5 <5 <5 <5 89
Nitrate(NO3)as N(00620) 10 mg/I 0.22 0.51 2 0.06 0.04 1.7 2.1 2.4 2.8
Se-Selenium(01147) 20 ug/I 1.9 <1 <1 <1 <1 <1 <1 <1 <1
SO4-Sulfate(00945) 250 mg/I 56 11 4.9 0.31 <0.1 4.4 0.37 0.91 17
TI-Thallium(01059) 0.2 ug/I <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2
TDS-Total Diss.Solids(70300) 500 mg/I 170 83 110 89 <25 120 69 130 100
Zn-Zinc(01092) 1 mg/I <0.005 <0.005 0.014 <0.005 <0.005 <0.005 0.008 <0.005 <0.005
Al-Aluminum(01105) --- ug/I NA NA NA NA NA NA ' NA NA NA
Turbidity is field analyzed for information use only.
BOLD values equal or exceed the corresponding 2L standard Notes:
certify that,to the best of my knowledge and belief,the information submitted in this report is true,accurate,and complete,and that the laboratory analytical data was produced using approved methods of analysis by a DWQ-certified laboratory. I am aware that there are significant penalties for submitting false information,including the
•ossibility of fines and imprisonment for knowing violations.
Eric Matthews/ Station Mgr-PG Carolinas West / -c am _ g/tif i4
Permittee(or Authorized Agent)Name and Title-Please print or type Signa ure of Permittee(or Authorized Agent) Date
GW-59CCR 06/2014

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E.Skvarla, III
Governor Secretary
NOTICE OF DEFICIENCY
June 13, 2014
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Duke Energy Corporation 7011 1570 0000 0154 7357
Attention: Mr. Sean DeNeale, Engineer II
Environmental Services
Post Office Box 1006
Mail Code EC 13K
Charlotte,North Carolina 28201-1006
Duke Energy Corporation 7011 1570 0000 0154 7364
Attention: Mr. John Elnitsky, Vice President
Project Management and Construction
Post Office Box 1007
Mail Code ST-28U
Charlotte,North Carolina 28201-1007
RE: Allen Active Ash Basin Dam
GASTO-061 —High Hazard Potential
Catawba River Basin
Gaston County
Dear Mr. DeNeale and Mr.Elnitsky:
The "Dam Safety Law of 1967," as amended, provides for the certification and inspection of dams in the
interest of public health, safety, and welfare, in order to reduce the risk of failure of such dams; to prevent
injuries to persons, damage to property; and to insure the maintenance of stream flows.
Our records indicate that you are the owner/and or responsible for the referenced dam, which is located off
Plant Allen Road in Gaston County. On May 6, 2014, this Office received a digital copy of an internal
inspection of the spillway system for the referenced dam. This submittal was in response to an information
request issued by this Division on March 5, 2014, in which this Division requested that Duke Energy camera
inspect all facilities that have decant structures with corrugated metal pipe (CMP) and concrete components.
The decant structure for this dam is comprised of a concrete riser with concrete barrel.
A preliminary review of the camera inspection video of the decant structure and report has been performed
by personnel of the Land Quality Section for the referenced dam. The video documented numerous`'
Division of Energy, Mineral, and Land Resources
Land Quality Section-Mooresville Regional Office
610 East Center Avenue,Suite 301,Mooresville,North Carolina 28115
Telephone: [phone]/FAX: [phone]•Internet: http://portal.ncdenr.org/web/Ir/land-quality
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper 4

Duke Energy Corporation Allen Active Ash Basin Dam
June 13, 2014 GASTO-061
Page 2 of 2
infiltration weepers and drippers, stains and cracks, and missing or cracked joint material. Additionally, a
hole was observed at location 474.7 feet.
The condition of the decant structure appears serious enough to justify further engineering study in order to
determine appropriate remedial measures. Your dam is categorized as a"High Hazard"dam. In the event of
darn failure, significant environmental damage to Lake Wylie could occur due to release of coal ash stored
behind the dam.
In order to ensure the safety of this dam, you are directed to retain the services of a registered professional
engineer competent in the area of darn safety to review the internal video and provide a professional
assessment of the decant structure with regard to overall structural integrity and recommendations for repair.
Plans and specifications for repair based on the results of the study must be filed with the Division of Energy,
Mineral and Land Resources for approval pursuant to the North Carolina Administrative Code, Title 15A,
Subchapter 2D—Dam Safety(15A NCAC 2K). Please note any excavations in the dam or major repair work
to this dam must be approved by this Division before any work is done. Additionally, please note that this
dam may not be breached, meaning the darn may not be drained by cutting a notch in the darn, without prior
engineered breach plans being submitted to and approved by this Division.
Please submit a written response as quickly as possible, but no later than ten (10) days following
receipt of this Notice to advise us of your intended actions in this matter. This response must include a
schedule for repair plan development and implementation. If positive action is not taken within thirty
(30) days or before July 17, 2014, whichever term is longer, we shall present the case information for
appropriate enforcement action in accordance with North Carolina General Statute 143-215.36.
Enforcement action could include a civil penalty of up to $500.00 per day of violation, and/or issuance
of a Dam Safety Order requiring the repair or removal of this dam, and/or injunctive relief to gain
compliance.
Please notify this Office in writing if you wish to assert that you have no ownership or are otherwise not
responsible for maintenance or repairs to the subject dam. If you have an emergency situation during non-
office hours, you should notify 911 and the State Emergency Operations center at 1-[phone]. They
will notify the appropriate personnel in this office of the situation.
It is recommended that you or your engineer direct questions related to repair applications or the dam plan
review process to our dam safety staff at [phone]. All plans, specifications design data, and
calculations must be submitted to the State Dam Safety Engineer. If you have any questions regarding this
letter, please contact me at(704) 663-1699. Your cooperation and consideration in maintaining a safe dam is
appreciated.
Sincerely, 4--
Zahid S. Khan, CPM, CPESC, CPSWQ
Regional Engineer
Land Quality Section
ec: Steven M. McEvoy, PE, State Darn Safe Engineer

vici FA
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E.Skvarla, III
Governor Secretary
NOTICE OF DEFICIENCY
June 13,2014
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Duke Energy Corporation 7011 0570 0000 0154 7333
Attention: Mr. Sean DeNeale, Engineer II
Environmental Services
Post Office Box 1006
Mail Code EC 13K
Charlotte,North Carolina 28201-1006
Duke Energy Corporation 7011 1570 0000 0154 7340
Attention: Mr. John Elnitsky, Vice President
Project Management and Construction
Post Office Box 1007
Mail Code ST-28U
Charlotte,North Carolina 28201-1007
RE: Allen Retired Ash Basin Dam
GASTO-016—High Hazard Potential
Catawba River Basin
Gaston County
Dear Mr. DeNeale and Mr. Elnitsky:
The "Dam Safety Law of 1967," as amended, provides for the certification and inspection of dams in the
interest of public health, safety, and welfare, in order to reduce the risk of failure of such dams; to prevent
injuries to persons, damage to property; and to insure the maintenance of stream flows.
Our records indicate that you are the owner/and or responsible for the referenced dam, which is located off
Plant Allen Road in Gaston County. On May 6, 2014, this Office received a digital copy of an internal
inspection of the spillway system for the referenced dam. This submittal was in response to an information
request issued by this Division on March 5, 2014, in which this Division requested that Duke Energy camera
inspect all facilities that have decant structures with corrugated metal pipe (CMP) and concrete components.
The decant structure for this dam is comprised of a concrete riser with CMP components and a concrete
barrel.
•
Division of Energy, Mineral, and Land Resources
Land Quality Section-Mooresville Regional Office
610 East Center Avenue,Suite 301,Mooresville, North Carolina 28115
Telephone: [phone]/FAX: [phone]•Internet: http://portal.ncdenr.org/web/Ir/land-quality
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper

Duke Energy Corporation Allen Retired Ash Basin Dam
June 13, 2014 GASTO-016
Page 2 of 2
A preliminary review of the camera inspection video of the decant structure and report has been performed
by personnel of the Land Quality Section for the referenced dam. The video documented an infiltration
gusher in the riser. Additionally, cracks, spalling and infiltration stains were observed.
The condition of the decant structure appears serious enough to justify further engineering study in order to
determine appropriate remedial measures. Your dam is categorized as a"High Hazard" dam. In the event of
dam failure, significant environmental damage to Lake Wylie could occur due to release of coal ash stored
behind the dam.
In order to ensure the safety of this dam, you are directed to retain the services of a registered professional
engineer competent in the area of dam safety to review the internal video and provide a professional
assessment of the decant structure with regard to overall structural integrity and recommendations for repair.
Plans and specifications for repair based on the results of the study must be filed with the Division of Energy,
Mineral and Land Resources for approval pursuant to the North Carolina Administrative Code, Title 15A,
Subchapter 2D—Dam Safety(15A NCAC 2K). Please note any excavations in the dam or major repair work
to this dam must be approved by this Division before any work is done. Additionally, please note that this
dam may not be breached, meaning the dam may not be drained by cutting a notch in the dam, without prior
engineered breach plans being submitted to and approved by this Division.
Please submit a written response as quickly as possible, but no later than ten (10) days following
receipt of this Notice to advise us of your intended actions in this matter. This response must include a
schedule for repair plan development and implementation. If positive action is not taken within thirty
(30) days or before July 17, 2014, whichever term is longer, we shall present the case information for
appropriate enforcement action in accordance with North Carolina General Statute 143-215.36.
Enforcement action could include a civil penalty of up to $500.00 per day of violation, and/or issuance
of a Dam Safety Order requiring the repair or removal of this dam, and/or injunctive relief to gain
compliance.
Please notify this Office in writing if you wish to assert that you have no ownership or are otherwise not
responsible for maintenance or repairs to the subject dam. If you have an emergency situation during non-
office hours, you should notify 911 and the State Emergency Operations center at 1-[phone]. They
will notify the appropriate personnel in this office of the situation.
It is recommended that you or your engineer direct questions related to repair applications or the dam plan
review process to our dam safety staff at [phone]. All plans, specifications design data, and
calculations must be submitted to the State Dam Safety Engineer. If you have any questions regarding this
letter, please contact me at(704) 663-1699. Your cooperation and consideration in maintaining a safe dam is
appreciated.
Sincerely,
Zahid S. Khan, CPM, CPESC, CPSWQ
Regional Engineer
Land Quality Section
ec: Steven M. McEvoy, PE, State Darn Safety Engineer
r2ic�nc Ca_ctihj

Bell, Wes
From: Stowe, Allen [[e-mail]]
Sent: Monday, December 23, 2013 2:24 PM
To: Bell, Wes
Cc: Scruggs, Don
Subject: FW: Allen Cell 1 Incident
Wes,
As promised earlier this morning,the account of the wastewater release at Allen Steam Station is listed below. Please
let me know if any additional information is needed. Thanks
Allen Stowe
Water& Natural Resources
Duke Energy
704-382-4309 (Office)
704-516-5548(Cell)
[e-mail]
From: Scruggs, Don ;�rn 1 ; oZOI 3OD�3p2�'
Sent: Monday, December 23, 2013 12:21 PM
To: Matthews, Eric; Farabaugh, Matthew; Burns, Brad
Cc: Herrick, Dayna J; Sideris, Harry; Culbert, Erin B; DeNeale, Sean; Stowe, Allen
Subject: Allen Cell 1 Incident
Allen RAB Landfill Cell 1 repair project experienced a slope failure on the south slope of cell 1 as a result of a rain event
which occurred on 12/22-23/13. In advance of an approaching weather system, Charah put measures into place to deal
with the rain event. Heavier than anticipated rainfall amount caused water to pond on the southern end of cell 1,and
it appears that the ponded water undermined the bermed area, resulting in two erosion areas which allowed waste
material to move outside of the liner. Approximately 25 cu yds of a 60/40 blend of ash and soil was released outside of
liner. In addition,an estimated 800 gallons of ash contact water was also released to the storm water channel which
discharges to Catawba River. Larry Frost and Bill Wagner, NCDENR, Division of Waste Management were informed of
the incident by Sean DeNeale. Wes Bell, NCDENR, Division of Water Resources was informed of the release to surface
water by Allen Stowe. Charah is actively working to clean up the material and repair cell 1 surface and south slope.
Environmental Field Support
Allen Steam Station
704 829-2423 Office
704 400-3005 Cell
1

A • .A
FIL
NCDENR 1
North Carolina Department of Environment and Natural Resources
•
Division of Water Resources
Water Quality Programs
Pat McCrory Thomas A. Reeder John E.Skvarla, III
Governor Director Secretary
December 3, 2013
Mr. Allen Stowe, Water Management
Duke Energy
Post Office Box 1006/EC13K
Charlotte,North Carolina 28201-1006
Subject: Compliance Evaluation Inspection
Allen Steam Station
NPDES Permit No. NC0004979
Gaston County
Dear Mr. Stowe:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the
subject facility on November 21, 2013 by Mr. Wes Bell of this Office. Please inform the facility's Operator-in-
Responsible(ORC)of our findings by forwarding a copy of the enclosed report.
The report should be self-explanatory; however, should you have any questions concerning this report,please
do not hesitate to contact Mr. Bell at(704)235-2192 or at [e-mail].
Sincerely, ,(
-ec-1 Michael L. Parker
Supervisor
Water Quality Regional Operations Section
Enclosure:
Inspection Report
cc: Gaston County Health Department
WB
Mooresville Regional Office One
Location:610 East Center Ave..Suite 301 Mooresville,NC 28115 NO hCaToII
Phone:[phone] Fax:[phone] Customer Service:1-877-623-6748
na
Internet www.ncwaterquality.org aturallr,
An Equal Opportunity I Affirmative Action Employer—30%Recycled/10110 Post Consumer paper

United States Environmental Protection Agency Form Approved.
EPA Washington,D.C.20460 OMB No.2040-0057
Water CnmpIianre InspcCtion RApnrt Approval expires 8-31-98
Section A: National Data System Coding(i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 U 2 U 31 NC0004979 111 121 13/11/21 17 181 CJ 191.J 20L
Remarks
211 I I I I I I I I I 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 1 1 1 1 1 1 1 1 I 1166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ---------Reserved--------
671 1.5 1 69 70 U 71 L1 72 U 731 1 1 74 751 1 1 1 1 1 1 1 80
�---� Section B: Facility Data �--�
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number)
09:40 AM 13/11/21 11/03/01
Plant Allen Steam Station -
NCSR 2525 Exit Time/Date Permit Expiration Date
Belmont NC 28012 12:50 PM 13/11/21 15/05/31
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Donald Lynn Scruggs/ORC/704-829-2423/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Allen Stowe,526 S Chruch St Charlotte NC 282011002//704-382-4309/7043829840 No
Section C: Areas Evaluated During Inspection(Check only those areas evaluated)
■Permit ■Flow Measurement II Operations&Maintenance Records/Reports
Self-Monitoring Program a Sludge Handling Disposal II Facility Site Review Effluent/Receiving Waters
Laboratory
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Signature(s)of Ip&pector(s), Agency/Office/Phone and Fax Numbers /Date
Wes Bell l�V t- MRO WQ//704-663-1699 Ext.2192/ ( J/ /
Marcia Allocco — MRO WQ//704-663-1699 Ex1.2204/
' at ure of Management Q A evi er Agency/Office/Phone and Fax Numbers �'�D \
Marcia Allocco MRO WQ//704-663-1699 Ext.2204/
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

- 4N
NPDES yr/mo/day Inspection Type 1
31 NC0004979 111 121 13/11/21 117
18W
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Page# 2

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 11/21/2013 Inspection Type: Compliance Evaluation
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? 0 0 • 0
Is the facility as described in the permit? ■ n n ❑
#Are there any special conditions for the permit? ■ n n ❑
Is access to the plant site restricted to the general public? ■ ❑ ❑ n
Is the inspector granted access to all areas for inspection? i• ❑ ❑ ❑
Comment: The subject permit expires on 5/31/2015. No chlorination is added to
Outfalls 001, 003, and 004.
The last compliance evaluation inspection was performed on 3/1/2012.
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? ■ ❑ ❑ ❑
Is all required information readily available,complete and current? ■ n ❑ ❑
Are all records maintained for 3 years(lab.reg.required 5 years)? ■ n n ❑
Are analytical results consistent with data reported on DMRs? U ❑ ❑ n
Is the chain-of-custody complete? 11000
Dates,times and location of sampling ■
Name of individual performing the sampling •
Results of analysis and calibration •
Dates of analysis U
Name of person performing analyses ■
Transported COCs •
Are DMRs complete:do they include all permit parameters? U 0 ❑ ❑
Has the facility submitted its annual compliance report to users and DWQ? noon
(If the facility is=or>5 MGD permitted flow)Do they operate 24/7 with a certified operator on each shift? 0 0 ■ 0
Is the ORC visitation log available and current? U ❑ ❑ ❑
Is the ORC certified at grade equal to or higher than the facility classification? ■ 0 0 0
Is the backup operator certified at one grade less or greater than the facility classification? ■ n ❑ n
Is a copy of the current NPDES permit available on site? ■ ❑ ❑ ❑
Facility has copy of previous year's Annual Report on file for review? 0 0 • 0
Page# 3

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 11/21/2013 Inspection Type: Compliance Evaluation
Record Keeping Yes No NA NE
Comment: The records reviewed during the inspection were organized and well
maintained. Discharge Monitoring Reports (DMRs)were reviewed for the period
October 2012 through September 2013. No discharges were reported at Outfalls 002A
and 002E throughout the review period. All monitoring frequiencies were correct and a
daily maximum effluent iron violation (Outfall 002)was reported in February 2013. The
Division has previously addressed this violation through the issuance of an NOD.
The ORC last performed the weekly visual inspection of the dikes and all outfalls on
11/12/2013. The last in-depth monthly impoundment/dike inspection was performed on
11/19/2013.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? • 0 n n
Are all other parameters(excluding field parameters)performed by a certified lab? ■ n n n
#Is the facility using a contract lab? ■ n n n
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ n n n
Incubator(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? 00110
Incubator(BOD)set to 20.0 degrees Celsius+/-1.0 degrees? 0 0 ■
Comment: On-site field analyses (pH and temperature) are performed under field
laboratory certification #5134. Duke Power Environmental Services Laboratory and the
contracted services of Pace Analytical Services, Inc. (low level mercury)and ETS, Inc.
(toxicity) provide analytical support.
The pH meter appeared to be properly calibrated and documented.
Influent Sampling Yes No NA NE
#Is composite sampling flow proportional? onion
Is sample collected above side streams? U 0 n n
Is proper volume collected? ■ n n n
Is the tubing clean? n n ■ n
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ n ❑ n
Is sampling performed according to the permit? U n n n
Comment: The subject permit requires grab samples at the internal Outfall 005 (FGD
treatment system effluent) prior to entering the ash basin.
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? n ❑ U n
Is sample collected below all treatment units? ■ n n n
Page# 4

Fry
Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 11/21/2013 Inspection Type: Compliance Evaluation
Effluent Sampling Yes No NA NE
Is proper volume collected? ■ n n n
Is the tubing clean? 00110
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ ❑ ❑ ❑
Is the facility sampling performed as required by the permit(frequency,sampling type representative)? ■ ❑ ❑ ❑
Comment: The subject permit requires effluent grab samples.
Operations& Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ ❑ ❑ ❑
Does the facility analyze process control parameters,for ex: MLSS, MCRT,Settleable Solids, pH, DO,Sludge 0 0 ■ 0
Judge,and other that are applicable?
Comment: Duke Energy staff now operate the FGD wastewater treatment system
(formerly operated under contract with Siemens Water Technologies). The FGD
treatment system is connected to a computer monitoring system to assist the on-site
staff in the operation of the treatment units/processes. The ash basin and FGD
wastewater treatment system appeared to be properly operated and well maintained.
Equalization Basins Yes No NA NE
Is the basin aerated? n n • n
Is the basin free of bypass lines or structures to the natural environment? ■ ❑ ❑ 0
Is the basin free of excessive grease? ■ 0 ❑ ❑
Are all pumps present? ■ ❑ ❑ ❑
Are all pumps operable? ■ n n ❑
Are float controls operable? U ❑ ❑ ❑
Are audible and visual alarms operable? 0 0 ■ 0
#Is basin size/volume adequate? ■ ❑ ❑ ❑
Comment:
Chemical Feed Yes No NA NE
Is containment adequate? ■ ❑ ❑ ❑
Is storage adequate? ■ ❑ ❑ ❑
Are backup pumps available? U ❑ ❑ ❑
Is the site free of excessive leaking? ■ ❑ ❑ ❑
Comment:
Secondary Clarifier Yes No NA NE
Page# 5

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station 1411
Inspection Date: 11/21/2013 Inspection Type: Compliance Evaluation
Secondary Clarifier Yes No NA NE
Is the clarifier free of black and odorous wastewater? ■ n n n
Is the site free of excessive buildup of solids in center well of circular clarifier? ■ n n n
Are weirs level? ■ n n n
Is the site free of weir blockage? ■ n n n
Is the site free of evidence of short-circuiting? • n n n
Is scum removal adequate? r n n n
Is the site free of excessive floating sludge? ■ 0 ❑ n
Is the drive unit operational? ■ 0 .n 0
Is the return rate acceptable(low turbulence)? ■ n n n
Is the overflow clear of excessive solids/pin floc? ■ n n n
Is the sludge blanket level acceptable?(Approximately IA of the sidewall depth) ■ n n n
Comment: The FGD treatment system was not discharging at the time of the
inspection due to low influent flows/electricity not being generated.
Flow Measurement-Influent Yes No NA NE
#Is flow meter used for reporting? ■ n n n
Is flow meter calibrated annually? Ninon
Is the flow meter operational? ■ n n n
(If units are separated)Does the chart recorder match the flow meter? n n ■ n
Comment: Internal Outfall 005 is equipped with an in-line flow meter. The flow meter
is calibrated/verified annually and was last calibrated/verified on 2/20/2013.
Solids Handling Equipment Yes No NA NE
Is the equipment operational? ■ n n n
Is the chemical feed equipment operational? ■ n n n
Is storage adequate? ■ n n n
Is the site free of high level of solids in filtrate from filter presses or vacuum filters? n ❑ n ■
Is the site free of sludge buildup on belts and/or rollers of filter press? 0 0 0 ■
Is the site free of excessive moisture in belt filter press sludge cake? 0 0 0 ■
The facility has an approved sludge management plan? ■ n n n
Page# 6

PPV
Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 11/21/2013 Inspection Type: Compliance Evaluation
Solids Handling Equipment Yes No NA NE
Comment: The FGD treatment system is equipped with three filter presses that were
all operational; however, no sludge was being processed at the time of the inspection.
The dewaterd sludge is transported to the on-site landfill equipped with a liner and
leachate collection system for final disposal.
The bottom ash is sluiced into the ash basin and the dry fly ash (majority of the total ash
production on-site) is either disposed of into the on-site landfill or distributed for usage in
the concrete market. Ponded ashes including bottom ash and fly ash can be distributed
under the requirements of Permit No. WQ0000452.
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? 0 0 ■ 0
Is flow meter calibrated annually? 0 0 ■ 0
Is the flow meter operational? 0 0 • 0
(If units are separated)Does the chart recorder match the flow meter? 0 0 ■ 0
Comment: Flow measurements for Outalls 001, 003, and 004 are based on pump
curves/logs. Outfall 002 discharges are measured by a staff guage/ultrasonic level
indicator and weir. The ORC verifies the ultrasonic level indicator to the staff guage
twice per year with the last verification being performed in October 2013.
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? ■ ❑ ❑ ❑
Are the receiving water free of foam other than trace amounts and other debris? ■ ❑ ❑ ❑
If effluent (diffuser pipes are required) are they operating properly? 0 0 ■ 0
Comment: No discharges were observed from Outfalls 002A, 002B, and 005 (internal)
at the time of the inspection. The discharges from Outfalls 001, 002, 003, and 004
appeared clear with no floatable solids or foam.
Page# 7

Bell, Wes
From: Scruggs, Don [[e-mail]]
Sent: Monday, September 09, 2013 11:37 AM
To: Bell, Wes
Subject: Allen Steam Station Spill-9/3/2013
Mr. Bell,
This is a follow up to our conversation of September 4, 2013 regarding waste water spill from "A" ash line which
occurred September 3, 2013. Allen Steam Station has completed the following actions related to the release:
• Water which was released to the storm water sedimentation basin was collected and pumped to ash pond#3
over a four day period.
• Bottom ash which was released was vacuumed and disposed of in Allen Steam Station industrial landfill.
• Investigation into cause of failure revealed a restriction in a butterfly valve. That valve has been bypassed until
restriction can be cleared.
• No adverse impact was observed.
Please contact me if you have further questions
Vag Saa994
Environmental Field Support
Allen Steam Station
704 829-2423 Office
704 400-3005 Cell
1

bENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory Charles Wakild, P.E. John E.Skvarla, III
Governor Director Secretary
May 23, 2013
Mr. Allen Stowe, Water Management
Duke Energy Carolina, LLC
526 South Church Street, EC13K
Charlotte, North Carolina 28202
Subject: Notice of Deficiency— Effluent Limitation
Tracking #: NOD-2013-LV-0070
Plant Allen Steam Station
NPDES Permit No. NC0004979
Gaston County
Dear Mr. Stowe:
A review of the February 2013 self-monitoring report for the subject facility revealed a violation of the
following parameter at Ouffall 002:
Date Parameter Reported Value Permit Limit
2/5/13 Total iron 1.64 mg/L 1.58 mg/L (Daily maximum)
Remedial actions, if not already implemented, should be taken to correct the causes(s) of the noted
violation. Unresolved violations may lead to the issuance of a Notice of Violation and/or assessments
of civil penalties by the Division of Water Quality.
If the violations are of a continuing nature, not related to operation and/or maintenance problems, and
you anticipate remedial construction activities, then you may wish to consider applying for a Special
Order by Consent (SOC).
Thank you for your attention to this matter. If you have questions concerning this matter or to apply
for a SOC, please do not hesitate to contact Ms. Marcia Allocco at [phone].
Sincerely,
1,614 &, �
Michael L. Parker
Surface Water Protection
Regional Supervisor
cc: Point Source Branch
MA
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:http:l/portal.ncdenr.org/weblwq Naturally
An Equal Opportunity 1 Affirmative Acton Employer—30%Recycled/10%Post Consumer paper

Bell, Wes
From: Scruggs, Don [[e-mail]]
Sent: Friday, January 04, 2013 5:16 PM
To: Bell, Wes
Subject: Oil Spill Follow Up
On January 3`d, 2013..... an oil sheen was observed on Catawba River near Allen intake area at 1315 due to a broken 5/8"
drain line from Unit 3 A river screen reduction gear motor. Approximately 2 gallons of lube oil was released.
Operations personnel cleaned up the river screen housing and installed a plug in the reduction gear motor until the
drain line can be repaired. Oil remaining on the riverscreen housing was removed using absorbent matting. Unit 5
river circulator pump was operating serving to contain the sheen at point of release.As preparations were underway to
deploy an absorbent boom a light breeze came up and threatened to disperse the sheen to the south and east(away
from station intake). At that point the decision was made to start Unit 1 river circulator pump,which effectively pulled
the sheen into the plant CCW process, moved the water through Unit 1 water box and discharged the water into the
CCW discharge canal (NPDES Outfall 001). A permanent containment boom is in place just downstream of the outfall.
Visual observations at the containment boom were conducted at 1630 on 1/3 and 0730, 1130 and 1600 on 1/4. No
sheen was observed.Visual observations were also conducted in the vicinity of the spill on 1/4 at 0745, 1145 and 1300.
Again, no residual sheen observed.
National Response Center was notified of the spill 1/3/13 at 1720. (Incident# 1034745)
Let me know if you have additional questions.
[/oa ,'C'Le4994
Environmental Field Support
Allen Steam Station/Lower Catawba Hydro
704 829-2423 Office
704 400-3005 Cell
c :dt „4- r-; poi 3 aoae?
•

1PP ig,ktibii
Collection System SSO 24-Hour Notification -pp—. V'
�
Collection System: Number and Name r, -�.�• Ili ed .,.
��0 /D13 '
Incident Number from BIMS 201 ,19•
Incident Reviewed (Date):
Incident Action Taken:
NOV-2011-DV
DV-2011-
Spill Date i//7 Time 000 am/ pm
Reported Date zP f/gl/�-
Time D 75' am/ pm
Reported To SWP Staff or EM Staff
"-nn Phone ,�l �� . �5�
Reported By C7 2 ( c%
Sill 74 3) 2M( ..54 �kJ
Address of p
County AN t:0 City ‘dii(01
Cause of Spill6/idke /
di d crate& �.
D�?� Gal toStream Est. o��� �7 0�
Total Estimated Gallons �� e���
StreamAA.,d4 gi�f.�- Fish Kill: Yes No Number Species
..--A----1.
Non Required Information and other comments relating to SSO incident:
Response time minutes Zone Map Quad
ea'a466911 - 6(64 ild
Cu/a
AyNte5 - M h - dam
pai i„t AV: ahieJ - 9„., 16 ad, 6a,at,
(loose/tie-4 - may- - cow

Bell, Wes
From: Scruggs, Don [[e-mail]]
Sent: Thursday, June 21, 2012 1:15 PM
To: Sifford, Barbara
Cc: Bell, Wes
Subject: 5 Day follow up report
Attachments: 5 day follow up Allen Steam Station.pdf
Attached is 5 day follow up report for CY sump line release at Allen Steam Station. Hard copy will follow.
Thanks,
Veut S'vuerm
Environmental Field Support
Allen Steam Station/Lower Catawba Hydro
704 829-2423 Office
704 400-3005 Cell
1

•
Duk
Energy. ALLEN STEAM STATION
253 Plant Allen Rd.
Carolinas Belmont, NC 28012
704 829-2423
704 829-2370 fax
June 21, 2012
Ms. Barbara Sifford
Mooresville Regional Office
North Carolina Department of Environment and Natural Resources
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Subject: Duke Energy Carolinas, LLC/Allen Steam Station
NPDES Permit Number NC0004979
Wastewater Spill- Five Day Follow-up Report
Dear Ms. Sifford:
With reference to Part II, Section E.9 of the NPDES Permit, this letter is the five day follow-up report
associated with the unauthorized discharge incident at Allen Steam Station reported to you by Don Scruggs
on June 18, 2012 at approximately 8:20 am.
On the morning of June 17, 2012 the coal yard/yard drainage sump discharge line at Allen Steam Station was
determined to have a leak. Flow through this pipe was isolated and discharge flow was re-routed to a
parallel line by means of a crossover valve. Based on the station operation, the contents of the sump was
primarily once through cooling water, storm water and a small amount of partially treated domestic sewage.
It is estimated that 2,000 gallons of industrial waste water was released to the Catawba River. No adverse
impact to the environment was observed.
Presently, the pipe is still isolated and an investigation is underway to understand the cause of the failure.
Until then the pipe will continue to be isolated. If you need additional information or have questions please
contact Don Scruggs at 704 829-2423.
Sincerely,
ste:c ii/61:444
Eric Matthews
Production Manager
Allen Steam Station

bc: Erin Culbert EC12B
Allen Stowe EC13K
Don Scruggs Allen Steam Station
Brian Weisker Allen Steam Station
Certified Mail:7099 3400 0012 0537 0622

OPPPIPP-
Bell, Wes
From: Scruggs, Don [[e-mail]]
Sent: Thursday, June 21, 2012 3:44 PM
To: Bell, Wes
Subject: RE: Bypass
Discovered leak about 8:30am on the 17th and shut pumps down immediately some flow continued from upstream
head until around 9:00am on the 17tn
Voet Svueffd
Environmental Field Support
Allen Steam Station/Lower Catawba Hydro
704 829-2423 Office
704 400-3005 Cell
From: Bell, Wes [mailto:[e-mail]]
Sent: Thursday, June 21, 2012 2:18 PM
To: Scruggs, Don
Subject: Bypass
Don,
Do you know the time in which the spill was detected and the date/time the spill was stopped. Thanks.
Wes
Wes Bell-Wes.BellCcancdenr.gov
North Carolina Dept.of Environment& Natural Resources
Div.of Water Quality
610 E. Center Ave.,Suite 301
Mooresville, NC 28115
Ph: 704.235.2192 Fax: [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties unless the content is exempt by statute or other regulation.
1

lia L.
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory Charles Wakild, P.E. John E. Skvarla, Ill
Governor Director Secretary
January 28, 2013
Mr. Allen Stowe, Water Management
Duke Energy Carolinas, LLC
526 South Church Street, EC13K
Charlotte, North Carolina 28202
Subject: Division of Water Quality Site Visits
Riverbend Steam Station (NC0004961) and Plant Allen Steam Station (NC0004979)
Gaston County
Dear Mr. Stowe:
Enclosed you will find a compact disc (CD) containing information gathered during the site visits
conducted by Mooresville Regional Office staff(hereinafter MRO staff) at the above noted Duke Energy
Carolinas, LLC (hereinafter Duke) permitted facilities on December 4-6, 2012. The visits were conducted
in conjunction with the annual inspections of the coal ash impoundments by staff from the Land Quality
section of the Division of Energy, Mineral, and Land Resources (hereinafter DEMLR) under their dam
safety program.
The site visits were prompted by recent correspondence received from the Catawba Riverkeeper
Foundation, which highlighted their concerns with unpermitted seepages/outfalls at the noted facilities.
As a result, MRO.staff visited areas at both facilities where there was seepage (as defined by DEMLR)
from the coal ash impoundments, Outfall 002 as noted under the respective permits, and the areas
highlighted by the Catawba Riverkeeper directly along the shoreline (with Mountain Island Lake or lake
Wylie) as possible "seepage areas."
At each facility DWQ staff collected analytical samples (metals, dissolved solids, and nutrients) from
permitted Outfall 002 as well as three seepage locations (also sampled by Duke personnel). In addition,
MRO staff performed water quality readings (temperature, pH, dissolved oxygen, and conductivity) at the
above noted sampling locations along with areas around Outfall 002 at the Riverbend steam Station
(noted by the Catawba Riverkeeper Foundation).
The enclosed CD contains two folders. Folder 018 contains the pictures taken on December 4th and 5th
whereas folder 019 contains the pictures taken on December 6th along with a summary document
containing sampling location maps, the analytical results, and the field water quality readings. The
aforementioned information has been forwarded to the Division's NPDES Unit for their consideration.
If you have any questions regarding the enclosed information please contact Ms. Marcia Allocco or Mr.
Andrew Pitner at 704-663-1699.
Sincereel/ly, r�
G a,.
Michael L. Parker
Surface Water Protection Section Supervisor
Mooresville Regional Office
Enclosure: Data CD
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115 One
Phone:[phone]\Fax:[phone]\Customer Service:1-877-623-6748 North Carolina
Internet:http://portal.ncdenr.org/web/wq
An Equal Opportunity,Affirmative Action Employer-30%Recycled/l0%Post Consumer paper Naturally

A4,• A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Charles Wakild, P.E. Dee Freeman
Governor Director Secretary
March 6,2012
Mr. Allen Stowe, Water Management
Duke Energy
Post Office Box 1006/EC13K
Charlotte,North Carolina 28201-1006
Subject: Compliance Evaluation Inspection
Allen Steam Station
NPDES Permit No. NC0004979
Gaston County
Dear Mr. Stowe:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the subject
facility on March 1,2012 by Mr. Wes Bell of this Office. Please advise the facility's Operator-in-Responsible
Charge(ORC)of our findings by forwarding a copy of the enclosed report.
The report should be self-explanatory;however, should you have any questions concerning this report,please do not
hesitate to contact Mr. Bell at(704)235-2192, or at [e-mail].
Sincerely,
for Robert Krebs
Surface Water Protection Regional Supervisor
Enclosure:
Inspection Report
cc: Gaston County Health Department
WB
Mooresville Regional Office One
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115 NorthCarolina
Phone:[phone] Fax:[phone] Customer Service:1-877-623-6748 Naturally
Internet www.ncwaterquality.org
An Equal Opportunity\Affirmative Action Employer—30%Recycled/10%Post Consumer paper

United States Environmental Protection Agency Form Approved.
EPA Washington,D.C.20460 OMB No.2040-0057
Approval expires 8-31-98
Water Compliance Inspection Report
Section A: National Data System Coding(i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 1 ru 1 2 I I 31 NC0004979 111 121 12/03/01 1 17 181.9 I 191 S 1 201 I
�! !-! Remarks !J LJ
21IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII11166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ---
671 1.5 169 701 41 71 U 72' , 7731 1 174 751.
1 1 1 1 1 1 1 80
Section B: Facility Data
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number)
09:15 AM 12/03/01 11/03/01
Plant Allen Steam Station
NCSR 2525 Exit Time/Date Permit Expiration Date
Belmont NC 28012 12:35 PM 12/03/01 15/05/31
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Donald Lynn Scruggs/ORC/704-829-2423/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Jimmie Allen Stowe,526 S Chruch St Charlotte NC 282011002//704-382-4309/7043829840 No
•
Section C: Areas Evaluated During Inspection(Check only those areas evaluated)
Permit Flow Measurement •Operations&Maintenance •Records/Reports
II Self-Monitoring Program IN Sludge Handling Disposal II Facility Site Review IN Effluent/Receiving Waters
II Laboratory
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Signature(s)of Inspector() Agency/Office/Phone and Fax Numbers Date
7 / _
Wesley N Bell i /i-' 1��' MRO WQ//704-663-1699 Ext.2192/
Si nature of Management Q A Re�irer ._..-_Agency/Office/Phone and Fax Numbers Dat /
Marcia Allocco MRO WQ//704-663-1699 Ext.2204/
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

NPOES yr/mo/day Inspection Type
3 NC0004979 111 121 12/03/01 117 18'^I
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Page# 2

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
nspection Date: 03/01/2012 Inspection Type: Compliance Evaluation
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? n n ■ n
Is the facility as described in the permit? U n n n
#Are there any special conditions for the permit? ■ n n n
Is access to the plant site restricted to the general public? ■ n n n
Is the inspector granted access to all areas for inspection? ■ n n n
Comment: The subject permit expires on 5/31/2015. No chlorination is added to the
discharges at Outfalls 001, 003, and 004.
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? ■ ❑ n n
Is all required information readily available, complete and current? ■ n n n
Are all records maintained for 3 years(lab. reg. required 5 years)? ■ n ❑ n
Are analytical results consistent with data reported on DMRs? ■ n n n
Is the chain-of-custody complete? U n n n
Dates, times and location of sampling •
Name of individual performing the sampling ■
Results of analysis and calibration ■
Dates of analysis •
Name of person performing analyses
Transported COCs U
Are DMRs complete:do they include all permit parameters? ■ n n n
Has the facility submitted its annual compliance report to users and DWQ? 0 0 ■ 0
(If the facility is=or>5 MGD permitted flow)Do they operate 24/7 with a certified operator on each shift? n n ■ n
Is the ORC visitation log available and current? ■ n n n
Is the ORC certified at grade equal to or higher than the facility classification? ■ n n n
Is the backup operator certified at one grade less or greater than the facility classification? ■ n ❑ n
Is a copy of the current NPDES permit available on site? ■ n n n
Facility has copy of previous year's Annual Report on file for review? n n ■ n
Page# 3

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 03/01/2012 Inspection Type: Compliance Evaluation
Record Keeping Yes No NA NE
Comment: The records reviewed during the inspection were organized and well
maintained. Discharge Monitoring Reports (DMRs)were reveiwed for the period
December 2010 through November 2011. No effluent limit violations were reported and
all monitoring frequencies were correct.
The ORC performs and documents weekly visual inspections on the dikes and all
outfalls. In addition, facility staff perform and document in-depth inspections to the dikes
on a monthly basis and following a two-inch rainfall event. The last monthly dam/dike
inspection was performed on 2/28/2012.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? U n n n
Are all other parameters(excluding field parameters)performed by a certified lab? ■ n n n
#Is the facility using a contract lab? ■ n n n
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ n n n
Incubator(Fecal Conform)set to 44.5 degrees Celsius+/-0.2 degrees? n n ■ n
Incubator(BOD)set to 20.0 degrees Celsius+/- 1.0 degrees? 0 0 • 0
Comment: On-site field analyses (pH and temperature) are performed under
laboratory certification #5134. Duke Power's Environmental Services Laboratory
(Certification #248) and the contracted services of Pace Analytical Services, Inc. and
ETS, Inc. also provide analytical support. The pH meter and temperature measuring
devices appeared to be properly calibrated and documented.
Influent Sampling Yes No NA NE
#Is composite sampling flow proportional? ❑ n ■ n
Is sample collected above side streams? n n n
Is proper volume collected? U n n n
Is the tubing clean? n n U n
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? n n U n
Is sampling performed according to the permit? ■ n n n
Comment: The subject permit requires grab samples of the Flue Gas Desulfurization
(FGD)wastewater treatment system's discharge (internal Outfall 005) prior to entering
the ash basin.
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? 0 0 • 0
Is sample collected below all treatment units? ■ n ❑ n
Page# 4

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 03/01/2012 Inspection Type: Compliance Evaluation
Effluent Sampling Yes No NA NE
Is proper volume collected? • n n n
Is the tubing clean? 0 0 • 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? noon
Is the facility sampling performed as required by the permit(frequency,sampling type representative)? ■ n n n
Comment: The subject permit requires effluent grab samples at all outfalls.
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ n n n
Does the facility analyze process control parameters,for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge ■ n n n
Judge,and other that are applicable?
Comment: Siemens Water Technologies has been contracted to operate the FGD
wastewater treatment system. A molasses-based nutrient is added in both bioreactor
stages (selenium removal).
Duke has previously constructed pH adjustment facilities (sulfuric acid and sodium
hydroxide) adjacent to the ash basin. The pH can be adjusted on an as-needed basis
near the outlet of the ash basin discharge. Both wastewater treatment facilities (FGD
and ash basin) appeared to be properly operated and well maintained.
Equalization Basins Yes No NA NE
Is the basin aerated? n n ■ n
Is the basin free of bypass lines or structures to the natural environment? ■ ❑ ❑ n
Is the basin free of excessive grease? 0 0 • 0
Are all pumps present? ■ n n n
Are all pumps operable? ■ n n n
Are float controls operable? 110000
Are audible and visual alarms operable? 0 0 • 0
#Is basin size/volume adequate? 'Norm
Comment:
Chemical Feed Yes No NA NE
Is containment adequate? ■ 0 n n
Is storage adequate? ■ n n n
Are backup pumps available? ■ n n n
Is the site free of excessive leaking? • n n 0
Comment:
Page# 5

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 03/01/2012 Inspection Type: Compliance Evaluation
Secondary Clarifier Yes No NA NE
Is the clarifier free of black and odorous wastewater? NODO
Is the site free of excessive buildup of solids in center well of circular clarifier? ■ n n 0
Are weirs level? ■ n n n
Is the site free of weir blockage? ■ n n n
Is the site free of evidence of short-circuiting? ■ n ❑ ❑
Is scum removal adequate? ■ 0 n n
Is the site free of excessive floating sludge? ■ n n n
Is the drive unit operational? ■ n n n
Is the return rate acceptable(low turbulence)? 0 0 ■ 0
Is the overflow clear of excessive solids/pin floc? n n n U
Is the sludge blanket level acceptable?(Approximately 1/4 of the sidewall depth) ■ n n n
Comment: The facility was not discharging at the time of the inspecton due to low
influent flows.
Solids Handling Equipment Yes No NA NE
Is the equipment operational? ■ n n n
Is the chemical feed equipment operational? ■ n n n
Is storage adequate? ■ n n n
Is the site free of high level of solids in filtrate from filter presses or vacuum filters? n n n ■
Is the site free of sludge buildup on belts and/or rollers of filter press? n n n ■
Is the site free of excessive moisture in belt filter press sludge cake? n 0 ❑ ■
The facility has an approved sludge management plan? U n 0 ❑
Comment: The FGD wastewater treatment system is equipped with multiple filter
presses. Sludge was not being processed at the time of the inspection; however,
dewatered sludge is transported to the on-site landfill (equipped with a liner and
leachate collection system) for final disposal.
The bottom ash is sluiced into the ash basin and the dry fly ash (majority of the total ash
production on-site) is either disposed of into the on-site landfill or distributed for usage in
the concrete market. Ponded ashes including bottom ash and fly ash can be distributed
under the requirements of Permit No. WQ0000452.
Flow Measurement- Effluent Yes No NA NE
#Is flow meter used for reporting? n n ■ n
Is flow meter calibrated annually? n n ■ n
Page# 6

PPFPP.-
Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 03/01/2012 Inspection Type: Compliance Evaluation
Flow Measurement-Effluent Yes No NA NE
Is the flow meter operational? n n • n
(If units are separated)Does the chart recorder match the flow meter? 0 0 • 0
Comment: Flow measurements for Outfalls 001, 003, and 004 are based on pump
curves/logs. Outfall 002 discharges are measured by a staff guage/ultrasonic level
indicator and weir. The ORC verifies the ultrasonic level indicator to the staff guage at
minimum of once per year. Internal Outfall 005 discharge is measured by an in-line flow
meter that is calibrated/verified once per year(last calibrated/verified on 2/16/2012).
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? ■ n n n
Are the receiving water free of foam other than trace amounts and other debris? ■ n n n
If effluent (diffuser pipes are required) are they operating properly? 0 0 • 0
Comment: No discharges were observed from Outfalls 002A, 002B, and 005 (internal)
at the time of the inspection. The discharges from Outfalls 001, 002, 003, and 004
appeared clear with no floatable solids or foam.
Page# 7

Pell, Wes
From: Scruggs, Don [[e-mail]]
Sent: Thursday, March 01, 2012 2:43 PM
To: Bell, Wes
Subject: FW: Attached Image
Attachments: 1824_001.pdf
Wes, attached are two letters..the one you referenced today...and a follow up from Gil Vinzani...retracting some
language and referencing Special Condition A(14) and 15A NCAC 2K.....which does not specify an inspection frequency....I
think it was left up to Duke civil engineers who own the dike integrity program to specify frequency...as I penciled in red.
Let me know if this does not satisfy your concern.
Vela S'vta99,4
Environmental Field Support
Allen Steam Station/Lower Catawba Hydro
704 829-2423 Office
704 400-3005 Cell
From: DUKE-Allen Plant [mailto:[e-mail]]
Sent: Thursday, March 01, 2012 2:16 PM
To: Scruggs, Don
Subject: Attached Image
1

•
Arr,,,,A,
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
ErgitIVIE
January 20, 2011 JAN 2 1 20*
Mr. Allen Stowe
Duke Energy Corporation E� ,
EC13K/ PO Box 1006
Charlotte, NC 28201-1006
Subject: Cover Letter Clarification
NPDES Permit No.NC0004979
Duke Energy Carolinas Allen Steam Station
Gaston County
Dear Mr. Stowe:
Regarding the issuance of the subject permit on January 18, 2011, it has come to our attention that
the cover letter incorrectly stated requirements regarding integrity inspections of the ash pond dam.
Please note that dam integrity falls under jurisdiction of the NC DENR Division of Land
Resources/Dam Safety Program, and this facility must adhere to darn safety and design
requirements specified in 15A NCAC 2K. This dam integrity requirement is correctly stated within
Special Condition A(14)of the NPDES permit.
If you have questions regarding this correction, please contact Gil Vinzani at
[[e-mail]] or at [phone].
Si :ety f_,
'Om Belnick, Supervisor
NPDES Complex Permits Unit
Cc: Mooresville Regional Office, Surface Water Protection Section
NPDES Unit Files
Central Files
Strkfatetivict onIer,Raigigh.Nolinftirorxra 27699-10:
a Mbrtn Can Ana ua 2'60+�4oartx.re542 N..�.I�MrrYlsi t�afoi�
Phore t9 r« i FAX;friMri.i405 t(Mtomia Germ r 1• .6ii!.,748 ) ' a it y r; >
intern! ,416! r C„state,t!Cous,L
M srmr'Gi9ur4 to ''n eMs pt!ti 6h Ite

417466.,
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H.Sullins Dee Freeman
Governor Director Secretary
l� f is � vy L.,
January 18, 2011 I
fil , J
Mr. Allen Stowe JAN ?. 1 r011 i_,:..
Duke Energy Corporation
EC13K/ PO Box 1006
Charlotte, NC 28201-1006 �� `R''
Subject: Issuance of NPDES Permit No.NC0004979
Duke Energy Carolinas Allen Steam Station
Gaston County
Dear Mr. Stowe:
Division of Water Quality (Division) personnel have reviewed and approved your application for
renewal of the subject permit. Accordingly, we are forwarding the attached NPDES discharge
permit. it is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and
the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency dated October 15, 2007.
A public hearing was held on October 19, 2010 in Mooresville seeking comments on the Draft
permit and proposed continuation of the Clean Water Act Section 316(a) temperature variance.
This final permit incorporates recommendations of the DWQ Hearing Officer as well as other
changes. Listed below are all changes from the previous permit:
• Structural integrity inspection of ash pond darn This condition requires the facility to inspect for
dam integrity on a weekly basis and after any one-inch or greater rainfall event. Dam safety and
design requirements per 15A NCAC 2K are required. m,ea-tliy r 4,cie r 7 a 0 u a t J Et) & +
• CWA Section 316(a) Thermal Variance This condition requires the facility to submit a Balanced
and Indigenous Population (BIP) study plan that conforms to EPA study guidelines, and receives
DWQ and EPA concurrence prior to study implementation. A BIP report must be submitted no later
than 180 days prior to permit expiration, should the permittee request continuation of the CWA
Section 316(a) thermal variance.
1617 Mail Service Center,Raleigh,North Carolina 27699.1617
Location:512 N.Salisbury St.Raleigh,North Carolina 27604 One ,
Phone:[phone]k,FAX:[phone] Customer Service:1.877.623.8748 NOr•thCaro na
Internet:blip://h2o.slate,no.us/ r
An Equal Opoortumty 1 Affirmative Acton Employer Natural"
•

Duke ALLEN STEAM STATION
re,Energy® 253 Plant Allen Rd.
Carolinas Belmont, NC 28012
704 829-2423
704 829-2370 fax RFCEIVFD
DIVISION OF tiV,ITER QUALITY
January 6, 2012
r ,
Mike Parker roci:;-:_'L::.u_ }_.,., ;., L OFFICE
North Carolina Department of Environment and Natural Resources
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Subject: Duke Energy Carolinas„ LLC
NPDES Permit NC0004979
Unusual Condition WWTS
Dear Mr. Parker:
Due to elevated levels of halogens in the Flue Gas Desulfurization (FGD) Purge entering the Waste Water
Treatment System (WWTS), FGD Purge water was redirected around the bioreactor from 10:00 p.m. on
12/20/11 until 6:00 a.m. on 12/24/11. The Physical/Chemical treatment train operated as normal during this
timeframe. Flow to bioreactor resumed at 8:00 a.m. on 12/25/11. During the period that the FGD Purge was
being redirected the WWTS was only in operation for a total of 36 hours due to low electrical demand.
Elevated halogen levels have not been previously observed in FGD purge water. However, Allen Steam
Station has recently been conducting pilot studies with different coals and additives. Additional testing is
planned to prevent a reoccurrence of this problem in the future.
If you have any questions regarding this event, please contact me at 704-829-2423 or via email
Don.Scruggs(asduke-energy.com.
S. ly,
cruggs
Sr. EHS Professional
Allen Steam Station

RECEIVED
DIVISION OF WATER QUALITY ALLEN STEAM STATION
Duke 253 Plant Allen Rd.
Energy® D E C 1 9 2 01 1 Belmont, NC 28012
Carolinas
MOO.
704 829-2423
704 829-2370 fax
�J;dAL OFFICE
December 15, 2011
Mike Parker
North Carolina Department of Environment and Natural Resources
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Subject: NPDES Permit NC0004979
Temporary Bypass of Physical /Chemical Train in WWTS
Dear Mr. Parker:
Per our conversation on April 13, 2011 this letter is intended to meet your requirements of notification of a
temporary bypass of the physical/chemical treatment train in Allen Steam Station WWTS. This bypass is
necessary to facilitate warranty work on several agitators associated with the physical/chemical train.
Expected duration of bypass is eight days tentatively scheduled to begin 01/09/2012. Consulting engineer
is confident we will continue to achieve removal of Se, Hg and TSS to concentrations we have historically
measured while the bypass is running.
Components to be bypassed:
Reaction Tank# 1: Lime addition and sludge recycle
Reaction Tank#2: Organosulfide addition (not currently used)
Reaction Tank#3: Ferric Chloride addition
Flow Splitter: Polymer addition
Current plan is to forego lime and ferric addition. Polymer will be added by a temporary hose over to the
clarifier center well. Please be reminded the discharge of this WWTS is to an internal outfall for Outfall 002.
If you have any questions regarding this bypass, please contact Bill Kennedy at 980-721-7626 or email
[e-mail].
SiReere4,
/ M1/6( ‘Aili
D cruggs
Sr. EHS Professional
Allen Steam Station

A7I Or
r
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Land Resources
James D. Simons, PG,PE Beverly Eaves Perdue,Governor
Director and State Geologist Dee Freeman,Secretary
Certificate of Approval
November 30, 2010
CERTIFIED MAIL
RETURN RECEIPT
Duke Energy Corporation
Attn: Mr. B. Henry Taylor, PE, Senior Engineer
Procurement, Construction and EH&S —Environmental Projects
EC 11 Y P.O. Box 1006
Charlotte, North Carolina 28201-1006
RE: Allen Retired Ash Basin Dam
Approval to Modify
Gaston County
State Dam ID: GASTO-016
Dear Mr. Taylor:
This is in response to your submissions dated and received as follows of plans, specifications and
design data for modification of the subject dam in compliance with the Dam Safety Law of 1967.
1. "OPERATIONS PLAN RETIRED ASH BASIN (RAB)—ASH LANDFILL ALLEN
STEAM STATION BELMONT, NORTH CAROLINA" document dated March 11,
2008, revised September 3, 2010. This document was received on September 9, 2010.
2. "Permit to Operate—Modifications Request" document dated September 3, 2010. This
document was received on September 9, 2010.
3. "Permit to Operate—Modifications Request—Response to NCDENR Comments"
document dated November 11, 2010. This document was received on November 12,
2010.
This dam is of high hazard classification. These plans, specifications and design data were
prepared under the supervision of Mr. Kenneth R. Daly, PE, with S&ME, Inc.
Geological Survey•Land Quality•Geodetic Survey
Division of Land Resources•1612 Mail Service Center, Raleigh, North Carolina 27699-1612
512 North Salisbury Street,Raleigh, North Carolina 27604
Telephone [phone]/FAX: [phone] •Internet:http://www.dlr.enr.state.nc.us/index.html

Mr. B. Henry Taylor, PE Allen Retired Ash Basin Dam
Approval to Modify GASTO-016
November 30, 2010
Page 2 of 3
This letter constitutes approval of the proposal to modify the subject dam according to the plans
and specifications received by this Division on September 9, 2010, revised November 12, 2010
with the following stipulations:
1. Project construction shall be supervised by Mr. Kenneth R. Daly, PE. Mr. Kenneth R.
Daly, PE shall be responsible for field observation of construction as necessary to ensure
compliance with approved plans. Mr. Kenneth R. Daly, PE shall provide a report to this
office on March 31, June 30, September 30 and December 31 of each year for the
duration of the project beginning in 2011. The report is to be in a format which will
certify that material placement to date is in accordance with approved compaction
requirements and provide professional opinion as to whether material strength parameters
assumed in the structural analyses by S&ME, Inc. dated February 18, 2009 and May 1,
2009 remain valid. This report is to be provided in digital format.
2. During construction, the Division of Land Resources may require such progress reports
as are deemed necessary.
3. The Operations Plan shall be revised as follows for quality control of compaction effort
on dry placed waste ash material:
a. Waste fill shall be compacted to a minimum of 95 (ninety-five) percent of its
Standard Proctor(ASTM D698) maximum dry density. Compacted moisture
content shall be within 5 (five) percent of optimal moisture content.
b. Cells 1 and 3: At minimum, perform in-place density tests at a frequency of one
test per 8,000 cubic yards (or one test per 216,000 square feet of 12-inch thick
lift). At minimum, develop one moisture-density relationship (Standard Proctor
test—ASTM D698) at a frequency of one test per 50,000 cubic yards of material
placed.
c. Cells 2 and 4: At minimum, perform in-place density tests at a frequency of one
test per 2,000 cubic yards (or one test per 54,000 square feet of 12-inch thick lift).
At minimum, develop one moisture-density relationship (Standard Proctor test—
ASTM D698) at a frequency of one test per 20,000 cubic yards of material placed.
4. In accordance with GS 143-215.29 and NCAC 15A-2K .0203, .0212, .0215, and .0216,
within 30 days of completion of the project, Mr. Kenneth R. Daly, PE shall inspect the
completed work and upon finding that the work has been done as specified and the dam is
safe, shall file with the Division of Land Resources two sets of record drawings and a
certificate stating that the work has been completed in accordance with approved plans,
specifications and other requirements.
5. Final approval for operation of this dam must be issued by the Division of Land
Resources upon project completion.
6. An emergency action plan (EAP) is required for all high hazard dams. It is strongly
recommended that the EAP be submitted prior to commencing modifications to address

iiv
r. B. Henry Taylor, PE Allen Retired Ash Basin Dam
Approval to Modify GASTO-016
November 30, 2010
Page 3 of 3
problems that may arise during construction. Nevertheless, the EAP must be received
prior to March 31, 2011 or this approval is void.
7. You must notify Mr. Zahid Khan, Regional Engineer, Land Quality Section, 610 East
Center Avenue, Mooresville, North Carolina 28115, [phone] ten days before the
start of construction.
The Army Corps of Engineers and the Water Quality Section of this Department should be
contacted to determine if additional permits are required. Also, the erosion and sediment control
program having jurisdiction should be contacted to determine permit requirements. In any case,
sediment must be prevented from entering the waters of the state or flowing onto neighboring
property.
Construction of the modifications must begin within one year of the date of this letter or this
approval is void. For assistance you may contact the Mooresville Regional Office at (704) 663-
1699 or a staff member of the Dam Safety Program in the Raleigh Central Office at telephone
number(919) 733-4574.
Si, erely,
r 6 ,_
James D. Simons, PG, PE
Director and State Geologist
JDS/smm
cc: Mr. Kenneth R. Daly, PE, with S&ME, Inc.
Mr. Zahid Khan, Land Quality Regional Engineer
File name: GASTO-016 20101 130 COAM Allen Retired Ash Basin Dam.doc

•rArr TWO La6oratory Section WesuIts
County: GASTON Sample ID: AB59463
River Basin CTB RECEIVED OF WArF9p PO Number# 10W4700
Report To MROSP pIVISION OF WATER QUAL Date Received: 06/09/2010
Collector: D HOOD qq{{�� IA > y Time Received: 08:20
Region: MRO JAN 2.0 LU1�,-js `- LabworksLoginID SMATHIS
Sample Matrix: WASTEWATER. Report Generated: 1/5/11
SWP SECTION Date Reported: 01/05/2011
Loc.Type: EFFLUENT MOORESVILLE REGIONAL OFFICE. •
. uf,{, y 'I Emergency Yes/No Visitl0 '. # �,\,.�L.t-:-> •,
COC Yes/No
4�'t .JPIf
Loc.Descr.: ALLEN-DUKE POWER ? ,�.,...
Location ID: NC0004979 Collect Date: 06/0812010 Collect Time: 14:30 'Sample Depth 1 .
CAS# Analyte Name PQL` .•. . Result/ Units Method Analyses Validated by
Qualifier Reference Date
LAB
Sample temperature at receipt by lab . . 0.6 `C 6/9/10 _ SMATHIS
MIC •
TOC in liquid 2 2.3 mg/L APHA5310B-20th 6/22/10 MOVERMAN
WET .
Chemical.Oxygen Demand in liquid 20 -, 20 U mg/L Hach 8000 6/24/10 CGREEN
Ion Chromatography ' ^'''' ..., _TITLE_ mg/L EPA 300.0 6/28/10 MOVERMAN
Chloride 1 ' 9.6 mg/L EPA 300.0 6/28/10 MOVERMAN
Fluoride 0.4 0.4 U mg/L EPA 300.0 . 6/28/10 MOVERMAN
Sulfate 2 • . 37 mg/L EPA 300.0 6/28/10 MOVERMAN
Total Dissolved Solids in liquid ,. 12 82 mg/L APHA2540C-18TH 6/9/10 MOVERMAN
NUT
NH3 as N in liquid 0.02 • 0.45 mg/L as N Lac10-107-06-1-J 6/9/10 CGREEN
Total Kjeldahl N as N in liquid . , 0.2',:e. 0.82 mg/L as N Lachat107-06-2-H 6/11/10 CGREEN
NO2+NO3 as N in liquid 0.02' 0.28 mg/L as N Lac10-107-04-1-c 6/9/10 CGREEN
Phosphorus_total as P in liquid 0.02 0.12 mg/L as P Lac10-115-01-1EF 6/15/10 CGREEN
MET .
7440-22-4 Ag by ICPMS • 5 '' 50 P ug/L EPA 200.8 7/2/10 ESTAFFORD1
7429-90-5 Al by ICP 50 2600 •ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-38-2 As by furnace 2 • 12 ug/L EPA 200.9 6/23/10 ESTAFFORD1
7429-90-5 B by ICP 50,, ,. ? . 160 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-38-3 Ba by ICP • • 10 ' 220 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-41-7 Be by ICP 5' 5.0 U ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-70-2 Ca by ICP • • - . 0.1 11 mg/L EPA 200.7 - 6/30/10 ESTAFFORDI
7440-43-9 Cd by furnace 2 ... 1.0 U ug/L EPA 200.9 6/24/10 ESTAFFORD1
7440-48-4 Cobalt by ICP 50 50 U ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-47-3 Cr by ICP 10 10 U ug/L EPA 200.7 7/14/10 ESTAFFORDI
7440-50-8 Cu by ICPMS 2 35 ug/L EPA 200.8 7/2/10 ESTAFFORD1
7439-89-6 Fe by ICP 501.,r'. 5000 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7439-97-6 Hg 245.1 0:2 0.20 U ug/L EPA 245.1 6/22/10 ESTAFFORD1
7440-09-7 K by ICP _ 0.1 • 3.1 mg/L EPA 200.7 6/30/10 ESTAFFORD1
7439-93-2 Li ICP 25 - •• . 25 U ug/L EPA 200.7 6/30/10 ESTAFFORD1
7439-95-4 Mg by ICP . 0.1 3.5 ' mg/L EPA 200.7 6/30/10 ESTAFFORD1
Laboratory Section»1623 Mail Service Center,Raleigh,NC 27699-1623 [phone]
For a detailed description of the qualifier codes refer to httn:auortal.ncdenr.oro/web wrslap/staftiintalechassist 0ala Qualifier Codes<httulinonal.nalenr.orq/web/wgnabtstaffinfonechassisl>
. . Page 1 of 2

•
NC OWQ Laboratory Section Rpufts
Location ID: NC0004979 Sample ID: AB59463 Collect Date: 06/08/2010 Collect Time:: 14:30
MET
CAS# Analyte Name PQL Result/ Method • Analysis
Units Validated by
Qualifier Reference Date
7439-96-5 Mn by ICP 10 350 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7439-98-7 Mo by ICPMS 10' 200 P ug/L EPA 200.8 6/21/10 ESTAFFORD1
7440-23-5 Na by ICP - 0.1 6.4 • mg/L EPA 200.7 . 6/30/10 ESTAFFORD1
7440-02-0 Ni by ICP 10 , 12 ug/L EPA 200.7 7/14/10 ESTAFFORD1
7439-92-1 Pb by furnace 10 10 U ug/L EPA 200.9 6/24/10 ESTAFFORD1
7440-36-0 Sb by ICPMS 10 200 P. ug/L EPA 200.8 6/21/10 ESTAFFORD1
7782-49-2 Se by furnace • 5 7.8 ug/L EPA 200.9 7/2/10 ESTAFFORD1
7440-31-5 Sn by ICPMS 10' , 200 P ug/L EPA200.8 6/21/10 ESTAFFORD1
7440-28-0 Thallium(TI)ICPMS 10, • 200 P ug/L EPA 200.8 6/21/10 ESTAFFORD1
7440-32-6 Ti(Titanium)by ICP 10 180 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-62-2 V by ICP • 25 : 42 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-66-6 Zn by ICPMS 10 34 • ug/L EPA 200.E 7/2/10 ESTAFFORD1
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. Laboratory Section»1623 Mail Service Center,Raleigh,NC 27699-1623 [phone]
For a detailed description of the qualifier codes refer to http:uportel.ncdencornweb/wmtab/staffinfoiechassisu#Deta Qualifier Codes<hnpJ/oortatnmenr.omnrebtwi/ab/staifimmttechassist>
K s Page 2 of 2

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DIVISION OF WATER QUALITY }� �I (if
1)
Chemistry Laboratory Report/Water Quality a nl u D r ,
El SAMPLE TYPE Date Received: i^ 9 r'J
V COUNTY : n 61..0" PRIORITY Time Received: to
RIVER BASIN: ev A,, E AMBIENT QA 0 STREAM A EFFLUENT Received By : 0 p
REPORT TO : d t¢-S VI (1/_ Regional Office COMPLIANCE `7 �2�
El CHAIN OF CUSTODY � LAKE 0 INFLUENT liel
/f)-/��}� � EMERGENCY VISIT ID 0 ESTUARY Data Released
Other : 7 / () I I I Date Reported:
COLLECTOR(S) � ('-ll, <� 1 'x41 )
Estimated BOD Ranger Station Location: '� PoW t//.
Seed: Chlorinated: Remarks:0 J+O I I C
ik.qti k .o li.o,6/t77 / /llOg�pint/ d) Date End�bzm/dd) Time BeginIQ Time gad Depth%DM,DB,DBM Value' ype-A,Il,L Compn!Ir'I',S.B Sulyyl Type
11 `19�1Y. / (/ 102 v 3 V /_WI v �a�11 �47 C
'
BOO 310 rnWL x Chloride 940 g/L ,NH3 as N 610 in/L
m Li-Lithium 1 132 uglL
COD High 340 mg/L Txv]TKN an N 625 ntg/L Mg-Magnesium 927 ing/L
COD Low 335
mg/L Chlorophyll a EPA 445.0 modified option ue/L NO2 plus NO3 as N 630 me- Mn-Manganese 1055 ug/L
Coliform.MF Fecal 31616 /1 OOmI P.Total as P 665 mg/L Nu-Sodium 929 mg/L
Coliform:MF Total 31 504 /100m1 Color:True 80 c.u. PO4 as P 70507 mg/L Arsenic Total 11102 ug/L
Coliform:tribe Fecal 31615 /100m1 Color(pH) 83 pH• c u. P:Dissolved as P 666 mg/I. Se-Selenium 1147 ut/1-
Cohform•Fecal Strep 31673 /100m1 Color:pH7.6 82 c u 'X K-Potassium mg/L Fig-hletcury 71900 up/I.
Residue:Total 500
mg/L Cyanide 720 n.g/L Cd-Cadmium 1027 ug/L Ba-Barium ug/L
~— Volatile 505 mg/L x Fluoride 951 reWL x Cr-Chromium:Total 1034 ug/L Organochlorine Pesticides
Fixed 510 mg/L �r Formaldehyde 71880 mg/L Cu-Copper 1042 ug/L Organophosphorus Pesticides
L Grease and Oils 556 mg/L Ni-Nickel 1067 ug/L Orgamonitrogen Pesticides
Residue:Suspended 530 m f/
m•L X Hardness Total 900 mgL \Pb-Lead 1051 ug/L Acid Herbicides
Volatile 535 f/ /.
Fixed 540 mg/L Specific Cond.95 umhos/cm Zn-Zinc 1092 ug/L
pH 403 units MBAS 38260 mg/L V-Vanadium ug/L Buse/Neutr l&Acid Fxtructuble Organics
Acidity to pH 4.5 436
nt L Phenols 32730 ug/L Ag-Silver 1077 stg/L TPll Diesel Range
mg/L Sulfate 945 mg/L Al-Aluminum 1105 ug/L
AlkalinityAl to H8. 435 vv
t to o pH 8.3 415
m L Sulfide 745 mg/L x Be-Beryllium 1012 ug/L Forgeable Organics(VOA hutlla roy'd)
Alkalinity to pH 4.5 410 mg/L X.Boron ,. .‹.Ca-Calcium 916 mg/L TPFI Gasoline Range
1'OC 680 mg/L Tannin&Lignin ug/L o-Cobalt 1037 ug/l. FPll/BTEX 0asuline Range
Turbidity 76 NM lfexavalent Chromium u;1Le-Iron 1045 ug/L Phytoplattktnn
Coliform Total Tube /100 nil Bicarbonate mg/L > 0.4o-Molybdenum ug/L
Carbonate mg/L �,eSb-Antimony utk/L
•
Total Dissolved Solids ml/L Sn-Tin
u'l.
TI-Thallium ug/L
Ti-Titanium ug/L ,
Hg-1631 ng/L Temperature on arrival(°C) VVV F.c
g
COMMENTS: I t
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FILE,
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
September 30, 2010
Mr. Allen Stowe, Water Management
Duke Energy
Post Office Box 1006/EC13K
Charlotte,North Carolina 28201-1006
Subject: Compliance Sampling Inspection
Allen Steam Station
NPDES Permit No. NC0004979
Gaston County,N.C.
Dear Mr. Stowe:
Enclosed please find a copy of the Compliance Sampling Inspection Report as well as the
results from the laboratory analyses on the samples collected at different stages of the FGD
treatment system at the Allen Steam Station during the inspection of the subject facility. The
samples analyzed were all grab samples collected during the Compliance Sampling Inspection
performed on June 6, 2010 by Ms. Donna Hood and Mr. Wes Bell of the Mooresville Regional
Office and Ms. Autumn Romanski of the Raleigh Regional Office. Please inform the facility's
Operator-in-Responsible Charge of our findings by forwarding a copy of the enclosed report.
The Outfall 002 sample results were compliant with the current NPDES permitted effluent
limits. However, exceedances of Water Quality Standards were reported. Please be advised
that:
1. The following effluent results exceeded Water Quality Standards for Water Supplies:
Antimony(5.6 ug/1), Total Dissolved Solids (500 mg/L), Molybdenum (160 ug/l),
Manganese (200 ug/l), and Thallium(0.24 ug/l).
2. The Selenium results exceeded the weekly limit in the previous permit(21 ug/1) as well as
the Water Quality Standard for Class B waters (5 ugh!).
3. The following results exceeded the Water Quality Action Levels for Class B streams:
Copper(7 ug/1), Silver(0.06 ug/l), Chloride (230 mg/1).
4. The following exceeded Water Quality Standards: Aluminum (87 ug/l)
Sample results for Outfall 002A also had exceedances; however, Outfall 002A was not
discharging on the day of the inspection. Samples were taken from the wetwell influent, directly
across from the overflow pipe. Exceedances are as follows: Silver, Aluminum, Copper, Iron,
Manganese, Molybdenum, Antimony, Selenium, Thallium, and Temperature.

Outfall 002A is currently permitted for intermittent discharge and is only required to be
sampled after discharging for 30 minutes, the quality of the potential discharge is of concern. No
treatment is available to the wastewater discharging from 002A and excessive temperatures
(45.3°C/113.5°F) and other constituents could be detrimental to the receiving stream.
While no in-stream samples were collected, elevated effluent sample results indicate the
need for further investigation/sampling to ensure Water Quality standards are being met and the
Catawba and South Fork Rivers are being protected.
Should you have questions concerning this report,please do not hesitate to contact Ms.
Flood at(704) 663-1699.
Sincerely,
Robert B. Krebs
Regional Supervisor
Surface Water Protection
Enclosure:
DH

Watac 2usslit# Exeeet&aces
s " + "4s' �, { rz r z•";. S�,�"�) .i'.�� G, 'Y v7� ♦ "Jj.f .P'
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Outfall 002 Uq/! Ugh Ugh
Antimony 200 5.6
Selenium 25 5 (pervious permit: 21)
Total Dissolved Solids 768 500
Molybdenum 200 160
Manganese 300 200
Thallium 200 0.24
Copper 20 7
Silver 50 0.06
Chloride 240 230
Aluminum 190 87
Outfall 002A
Antimony 200 5.6
Silver 50 0.06
Aluminum 2600 87
Copper 35 7
Iron 5000 1000
Manganese 350 200
Molybdenum 200 160
Selenium 7.8 5
Thallium 200 0.24
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115 One
Phone:[phone] Fax:[phone] Customer Service:1-877-623-6748 NorthCarol ina
Internet:www.ncwaterquality.org Natural!!!
An Equal Opportunity\Affirmative Action Employer-50%Recycled/10%Post Consumer paper

, •
United States Environmental Protection Agency Form Approved.
E PA Washington,D.C.20460 OMB No.2040-0057
Water Compliance Inspection Report Approval expires 8-31-98
Section A: National Data System Coding(i.e.,PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 1 N1 2 1 51 31 NC0004979 111 121 10/06/08 117 181 SI 191 SI 201
Remarks
211111111111111111111111111111111111111111111111166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ------------Reserved----- —
671 5.0 169 701 41 711 1 721 NI 731 1174 751 I I I I I I 180
Section B: Facility Data
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number)
09:45 AM 10/06/08 09/08/01
Plant Allen Steam Station
NCSR 2525 Exit Time/Date Permit Expiration Date
Belmont NC 28012 03:30 PM 10/06/08 10/05/31
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Donald Lynn Scruggs/ORC/704-829-2423/
Name,Address of Responsible Official/Title/Phone and Fax Number
Jimmie Allen Stowe,526 S Chruch St Charlotte NC Contacted
282011002//704-382-4309/7043829840 No
Section C: Areas Evaluated During Inspection(Check only those areas evaluated)
Permit III Flow Measurement •Operations&Maintenance •Records/Reports
•Self-Monitoring Program •Sludge Handling Disposal Facility Site Review III Effluent/Receiving Waters
▪Laboratory
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Signature(s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Wesley N Be MRO WQ//704-663-1699 Ext.2192/
Donna Ho MRO WQ//704-663-1699 Ext.2193/ ! a
Si nature of Management Q A Re r w Agency/Office/Phone and Fax Numbers Date
Marcia" Allocco MRO WQ//704-663-1699 Ext.2204/ 9\ I
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

•
NPDES yr/mo/day Inspection Type (cont.) 1
31 NC0004979 1
11 121 10/06/08 117 181SI
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Stormwater:
The facility has several stormwater outfalls that discharge directly into waters of the State. Many potential
stormwater exposures from raw materials, by-products, metal storage dumpsters, etc exist as a result of the
facility's operations. The facility staff operate under an internal stormwater management
program that includes the identification of all stormwater outfalls and their respective drainage areas. The
Division's Stormwater Permitting Unit has indicated to MRO staff that the facility will need to apply for
coverage under an individual stormwater permit.
Page# 2

}
Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 06/08/2010 Inspection Type: Compliance Sampling
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? 111000
Is the facility as described in the permit? ■ n n n
#Are there any special conditions for the permit? n ■ n n
Is access to the plant site restricted to the general public? Un n n
Is the inspector granted access to all areas for inspection? Un n n
•
Comment: The facility is currently classified as a PC-1. The facility operates a
biological WWTP as well as extensive physical/chemical treatment. This information
has been submitted to Technical Assistance and Certification Unit(TACU)who will •
re-evaluate the current classification.
Operations &Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ n n n
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids,pH, DO,Sludge ■ 0 0 0
Judge,and other that are applicable?
Comment: Although Duke supplies the ORC for the faciltiy, the FGD WWTP is
currently operated by a contract operator, Siemens Water Technologies.
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? ■ n n n
Is all required information readily available, complete and current? ■ n n n
Are all records maintained for 3 years(lab. reg. required 5 years)? ■ n n n
Are analytical results consistent with data reported on DMRs? ■ n n n
Is the chain-of-custody complete? n n ■ n
Dates,times and location of sampling U
Name of individual performing the sampling U
Results of analysis and calibration
Dates of analysis U
Name of person performing analyses
Transported COCs n
Are DMRs complete: do they include all permit parameters? n ■ n n
Has the facility submitted its annual compliance report to users and DWQ? n n U n
(If the facility is=or>5 MGD permitted flow)Do they operate 24/7 with a certified operator on each shift? ■ n n n
Is the ORC visitation log available and current? ■ n n n
Is the ORC certified at grade equal to or higher than the facility classification? ■ n n n
Page# 3

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 06/08/2010 Inspection Type: Compliance Sampling
Record Keeping Yes No NA NE
Is the backup operator certified at one grade less or greater than the facility classification? ■ n n n
Is a copy of the current NPDES permit available on site? ■ n n n
Facility has copy of previous years Annual Report on file for review? n n ■ n
Comment: DMRs for March 2009-February 2010 were reviewed for the inpsection.
The facility failed to perform quarterly metals monitoring on Outfall 002 as stated in the
permit issued 08.01.2009.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? ■ n n n
Are all other parameters(excluding field parameters)performed by a certified lab? ■ n n n
#Is the facility using a contract lab? ■ n n n
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ n n n
Incubator.(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? n n ■ n
Incubator(BOD)set to 20.0 degrees Celsius+/- 1.0 degrees? n n ■ n
Comment: On-site field analyses are performed under laboratory certification #5134.
The Duke Power Analytical Laboratory (#248) performs all other necessary analyses
except toxicity. Toxicity is performed by ETS, Inc.
Yes No NA NE
Lagoons
Type of lagoons?
#Number of lagoons in operation at time of visit?
Are lagoons operated in?
#Is a re-circulation line present? n n ■ n
Is lagoon free of excessive floating materials? ■ n n n
#Are baffles between ponds or effluent baffles adjustable? n n ■ n
Are dike slopes clear of woody vegetation'? ■ n n n
Are weeds controlled around the edge of the lagoon? ■ n n n
Are dikes free of seepage? ■ nnn
Are dikes free of erosion?
■ nnn
Are dikes free of burrowing animals? ■ n n n
#Has the sludge blanket in the lagoon(s)been measured periodically in multiple locations? n ri n ■
#If excessive algae is present, has barley straw been used to help control the growth? n n ■ n
Is the lagoon surface free of weeds? ■ n n n
Page# 4

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 06/08/2010 Inspection Type: Compliance Sampling
Lagoons Yes No NA NE
Is the lagoon free of short circuiting? N n n n
Comment:
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? n n N n
Is flow meter calibrated annually? ■ n n n
Is the flow meter operational? ■ n n n
(If units are separated) Does the chart recorder match the flow meter? n n ■ n
Comment: Effluent flow is measured by pump logs and staff gauge.
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? ■ n n n
Is sample collected below all treatment units? ■ n n n
Is proper volume collected? ■ n n n
Is the tubing clean? ■ n n n
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ n n n
Is the facility sampling performed as required by the permit(frequency, sampling type representative)? ■ n n n
Comment: The facility was sampled on the day of the inspection. Please see the
attached sample result sheets for all sample results.
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? ■ n n n
Are the receiving water free of foam other than trace amounts and other debris? ■ n n n
If effluent (diffuser pipes are required) are they operating properly? n n ■ n
Comment:
Page# 5

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP Grab: X Composite:
Sample Date(s): 06/08/2010 NPDES Permit No. NC0004979
Sample Location: Outfall 002 County: Gaston
BOD5,mg/1 <2.0 --Mo=Molybdenumrug/t 200*
Na Sodium,mg/1 6.7
COD: Low,mg/1 <20
Chloride,mg/1 240 Ni-Nickel,ug/1 12
Fluoride,mg/1 <4.0* Pb-Lead,ug/1 <10
Sulfate,mg/I 85 Sb-Antimony,ug/I 200*
TDS-Total Dissolved Solids,mg/I 768 Se-Selenium,ug/1 25.0
Sn Tin,ug/1 200*
NH3-N,mg/I 0.34
Tl-Thallium,ug/I 200*
TKN,mg/1 0.50
Ti-Titanium,ug/1 <10
NO2+NO3,mg/1 0.64
P:Total,mg/1 0.12 V-Vanadium,ug/l <25
Ag-Silver,ug/1 50* Zn-Zinc,ug/I 31
Al-Aluminum,ug/I 190
TOC,mg/I <2.0
As-Arsenic- ug/1 2.5
TSS,mg/I <12.0
B-Boron,ug/1 5500 PH,su 6.4
Temperature,°C 28.5
Ba-Barium,ug/1 110
Be-Beryllium,ug/1 <5.0
Ca-Calcium,mg/I 130
Cd-Cadmium,ug/1 <2.0
Co-Cobalt,ug/1 <50
Cr-Chromium:Total,ug/1 <10
Cu-Copper,ug/1 20*
Fe-Iron,ug/I 150
Hg-Mercury,ug/1 <0.2
K-Potassium,mg/1 3.1
Li-Lithium,ug/1 <25
Mg-Magnesium,mg/I 29
Mn-Manganese,ug/1 300
*denotes an elevated PQL due to matrix spike interference and/or sample dilution

•
ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP Grab: X Composite:
Sample Date(s): 06/08/2010 NPDES Permit No. NC0004979
Sample Location: Outfall 002A County: Gaston
BODS,mg/1— Mo-Molybdenu ugL1 _ 200*
COD:Low,mg/1 <20 Na-Sodium,mg/1 6.4
Chloride,mg/I • 9.6 Ni-Nickel,ug/1 12
Fluoride,mg/I <0.4* Pb-Lead,ug/1 <10
Sb-Antimony,ug/1 200*
Sulfate,mg/1 37
TDS-Total Dissolved Solids,mg/I 82 Se Selenium,ug/1 7.8
Sn-Tin,ug/I 200*
NH3-N,mg/I 0.45
TI-Thallium,ug/1 200*
TKN,mg/I 0.82
Ti Titanium,ug/1 180
NO2+NO3,mg/1 0.28
P:Total,mg/1 0.12 V-Vanadium,ug/I 42
Ag-Silver,ug/I 50* Zn-Zinc,ug/1 34
Al-Aluminum,ug/I 2600 TOC,mg/1 2.3
Conductivity,umhos/cm 211
As Arsenic, ug/1 12
B-Boron,ug/1 160 PH,su 4.8
Temperature,°C 45.3
Ba-Barium,ug/1 220
Dissolved Oxygen,mg/1 2.8
Be-Beryllium,ug/1 <5.0
Ca-Calcium,ug/1 11
Cd-Cadmium,ug/1 <2.0
Co-Cobalt,ug/1 <50
Cr-Chromium:Total,ug/1 <10
Cu-Copper,ug/1 35
Fe-Iron,ug/1 5000
Hg-Mercury,ug/1 <0.2
K-Potassium,mg/I 3.1
Li-Lithium,ug/I <25
Mg-Magnesium,mg/1 3.5
Mn-Manganese,ug/1 350
*denotes an elevated PQL due to matrix spike interference and/or sample dilution

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP Grab: X Composite:
Sample Date(s): 06/08/2010 NPDES Permit No. NC0004979
Sample Location: FGD Influent County: Gaston
BOD5,mg/1 2.9
Mo-Molybdenurrc ug/1 - 1000* -
Na-Sodium,mg/1 34
COD:Low.mg/1 83
Chloride,mg/I 5300 Ni-Nickel,ugh 250
Fluoride,mg/1 <100* Pb-Lead,ug/1 150
Sulfate,mg/1 1000 Sb-Antimony,ug/1 1000*
TDS-Total Dissolved Solids,mg/1 23.500 Se-Selenium,ug/1 2300
1000*
NH3-N,mg/I 14 Sn-Tin,ugh
Tl-Thallium,ug/1 1000*
TKN,mg/1 18
NOS+NO3,mg/1 26 Ti-Titanium,ugh2500
200
P:Total,mg/1 4.3 V-Vanadium,ugh
Ag-Silver,ug/1 100* Zn-Zinc,ug/1 320
Al-Aluminum,ug/1 72,000
As-Arsenic, ug/1 210
B-Boron,ug/1 100,000
Ba-Barium,ugh 1,400
Be-Beryllium,ug/l 11
Ca-Calcium,ugh 3,600
Cd-Cadmium,ugh 4.7
Co-Cobalt,ug/1 100
Cr-Chromium:Total,ug/1 180
Cu-Copper,ug/I 230
Fe-Iron,ug/1 80,000
Hg-Mercury,ug/1 0.55
K-Potassium,mg/1 36
Temperature,°C
Li-Lithium,ugh 190
Mg-Magnesium,mg/1 640
Mn-Manganese,ugh 5600
s.te ..t.., pm A,,o to.natriv c,;4o intorfvronrP and/nr camnit.dilution

• •
ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP Grab: X Composite:
Sample Date(s): 06/08/2010 NPDES Permit No. NC0004979
Sample Location: Clarifier Effluent/Bioreactor Influent County: Gaston
BODS,mg/I — <2.0 Mo-Molyhdenum,ug/1 200*
COD:Low,mg/I 100 Na Sodium,mg/1 33
Chloride,mg/1 5600 Ni-Nickel,u I <10
Fluoride,mg/1 <100* _ <10
Sb-Antimony,ug/I 200*
Sulfate,mg/I 1100
TDS-Total Dissolved Solids,mg/1 23,400 Se-Selenium,ug/1 140
Sn-Tin,ug/I 200*
NH3-N,mg/1 17
TI-Thallium,ug/1 200*
TKN,mg/I 18
NO2+NO3,mg/I 28 Ti-Titanium,ug/l 100*
P:Total,mg/1 0.03
V-anadium,ug/l <25
Ag-Silver,ug/I 50* Zn-Zinc,ug/1 <10
Al-Aluminum,ug/1 <50
As-Antimony, ug/I 2.8
B-Boron,ug/1 110,000
Ba-Barium,ug/1 460
Be-Beryllium,ug/1 <5.0
Ca-Calcium,ug/1 3,200
Cd-Cadmium,ug/1 5.0*
Co-Cobalt,ug/1 <50
Cr-Chromium:Total,ug/I 20
Cu-Copper,ug/1 20*
Fe-Iron,ug/1 72
Hg-Mercury,ug/1 <0.2
K-Potassium,mg/1 15
Li-Lithium,ug/l 84
Mg-Magnesium,mg/I 620
Mn-Manganese,ug/1 800
*denotes an elevated PQL due to matrix spike interference and/or sample dilution

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP Grab: X Composite:
Sample Date(s): 06/08/2010 NPDES Permit No. NC0004979
Sample Location: FGD Effluent County: Gaston
BODS,mg/I <2.0 Mo-Molybdenumo ug/1--- — 200*
Na-Sodium,mg/1 24
COD:Low,mg/1 23
Chloride,mg/I 3500 Ni-Nickel,ug/I <10
Fluoride,mg/1 <100* Pb-Lead,ug/1 <10
Sb-Antimony,ug/I 200*
Sulfate,mg/I 740
TDS-Total Dissolved Solids,mg/1 13,500 Se-Selenium, ug/1 50*
Sn-Tin,ug/1 200*
NH3-N,mg/I 16
TI-thallium,ug/I 200*
TKN,mg/I 16
Ti-Titanium,ug/1 100*
NO2+NO3,mg/1 0.10
V-vanadium, ug/1 <25
P:Total,mg/1 0.17
Ag-Silver,ug/1 50* Zn-Zinc,ug/1 <10
AI-Aluminum,ug/1 170
As-Arsenic, ug/1 10*
B-Boron,ug/1 76,000
Ba-Barium,ug/I 240
Be-Beryllium,ug/1 <5.0
Ca-Calcium,ug/I 1,600
Cd-Cadmium,ug/I <2.0
Co-Cobalt,ug/1 <50
Cr-Chromium:Total,ug/1 <10
Cu-Copper,ug/I 20*
Fe-Iron,ug/1 370
Hg-Mercury,ug/1 <0.2
K-Potassium,mg/1 16
Li-Lithium,ug/1 58
Mg-Magnesium,mg/I 330
Mn-Manganese,ug/I 870
*denotes an elevated PQL due to matrix spike interference and/or sample dilution

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP Grab: X Composite:
Sample Date(s): 06/08/2010 NPDES Permit No. NC0004979
Sample Location: Slope Drain Effluent County: Gaston
BODS,mg/I - <2.0 Mo-Molybdenum,ug/1 — 200*
CC D:Low,mg/I • <20 Na-Sodium,mg/1 14
Chloride,mg/I 34 Ni-Nickel,ugil 12
Fluoride,mg/1 <0.4 Pb-Lead,ug/1 <10
Sb-Antimony,ug/1 200*
Sulfate,mg/I 22
TDS-Total Dissolved Solids,mg/I 116 Se-Selenium,ug/1 <5.0
NH3-N,mg/1 <0.02 Sn-Tin,ug/1 200*
Tl-Thallium,ug/I 200*
TKN,mg/1 <0.2
Ti-Titanium,ug/I <10
NO2+NO3,mg/I 0.67
P:Total,mg/I <0.02
V-Vanadium,ug/1 <25
Ag-Silver,ug/1 50* Zn-Zinc,ug/1 20
Al-Aluminum,ug/I 110 TOC,mg/I <2.0
As Arsenic, ug/1 <2.0
B-Boron,ug/1 190
Ba-Barium,ug/I 160
Be-Beryllium,ug/1 <5.0
Ca-Calcium,ug/I 5.4
Cd-Cadmium,ug/1 <2.0
Co-Cobalt,ug/1 <50
Cr-Chromium:Total,ug/1 <10
Cu-Copper,ug/1 20*
Fe-Iron,ug/1 190
Hg-Mercury,ug/1 <0.2
K-Potassium,mg/1 2.3
Li-Lithium,ug/1 <25
Mg-Magnesium,mg/1 8.9
Mn-Manganese,ug/1 200
*denotes an elevated PQL due to matrix spike interference and/or sample dilution

WC(DWO I.a6oratory Section Results
County: GASTON Sample ID: AB59462
River Basin CTB �pF WA T 9¢ PO Number# 10W4699
711
Report To MROSP 2O Date Received: 06/09/2010
•• RECEIVED > r
Collector. D HOOD w > z-I- Time Received: 08:20
Region: MRO DIVISION OF WATER QUALuTaf` -Q Y Labwofics LoginlD SMATHIS
Sample Matrix: WASTEWATER /�f I Report Generated: 1/5/11
Loc.Type: EFFLUENT JAN 2 U 20 I I Date Reported: 01/05/2011
Emergency Yes/No $WP SECTION VisitlD
COC Yes/No .. . • ,V0ArliPr° MED a 4 `d;.
MOISVILLE REGIONAL OFFICE .. �'
Loc.Descr.: ALLEN-DUKE POWER y • /L )t-1y li,�, �ot} �'�
r*h ri/- l/ v ' ..>L
Location ID: NC0004979 •. Collect Date: •06/08/2010 CollecfTif�t '" 12:i � ample-0 iti.1-:1T-.:,,.
CAS# Analvte Name • • PQL' Result/ Units Method Analysis Validated by
Qualifier Reference • Date
LAB
Sample temperature at receipt by lab' 0.6 `c ' 6/9/10 SMATHIS
MIC .
BOD, 5-Day in liquid 2 2 U mg/L • APHA5210B 6/9/10 MOVERMAN
TOC in liquid 2 2 U mg/L APHA5310B-20th 6/21/10 MOVERMAN
WET
Chemical Oxygen Demand in liquid 20':.:?t 20 U mg/L Hach 8000 6/22/10 CGREEN
Ion Chromatography _TITLE_ mg/L EPA 300.0 6/28/10 MOVERMAN
Chloride 1 240 mg/L EPA 300.0 . 6/28/10 MOVERMAN
Fluoride 0.4 • 4.0 U,P mg/L EPA 300.0 6/28/10 MOVERMAN
Sulfate 2 85 mg/L EPA 300.0 6/28/10 MOVERMAN
Grease and Oil in liquid 10 X2 mg/L EPA1664A 6/23/10 MOVERMAN
Total Dissolved Solids in liquid 12 768 mg/L APHA2540C-18TH , 6/9/10 MOVERMAN
NUT '
NH3 as N in liquid .• 0.02 'i 0.34 mg/L as N Lac10-107-06-1-J 6/9/10 CGREEN
Total Kjeldahl N as N in liquid - 0.2 0.50 mg/L as N Lachat107-06-2-H 6/11/10 CGREEN
NO2+NO3 as N in liquid 0.02 ; 0.64 mg/L as N Lac10-107-04-1-c - 6/9/10 CGREEN
• Phosphorus_total as P in liquid 0.02 • '0.12 : mg/L as P Lac10-115-01-1EF 6/15/10 CGREEN
MET
7440-22-4 Ag by ICPMS 5 50 P ug/L EPA 200.8 7/2/10 ESTAFFORD1
7429-90-5 Al by ICP 50 , • 190 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-38-2 As by furnace 2 'if:, 2.5 ug/L • EPA 200.9 6/23/10 ESTAFFORD1
7429-90-5 B by ICP • 50 5500 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-38-3 Ba by ICP • _ . 10 110 ug/L EPA 200.7 . 6/30/10 ESTAFFORDI
7440-41-7 Be by ICP • • 5 - r 5,0 U ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-70-2 Ca by•ICP ,0.1 130 mg/L EPA 200.7 6/30/10 . ESTAFFORD1
7440-43-9 Cd by furnace 2 1.0 U ug/L EPA 200.9 6/24/10 ESTAFFORD1
7440-48-4 Cobalt by ICP 50 50 U ug/L EPA 200.7 6/30/10 ESTAFFORDI
7440-47-3 Cr by ICP 10',-. ""i 10 U ug/L EPA 200.7 7/14/10 ESTAFFORD1
7440-50-8 Cu by ICPMS 2 20 P ug/L EPA 200.8 7/2/10 ESTAFFORD1
7439-89-6 Fe by ICP 50 150 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7439-97-6 Hg 245.1 0.2 • 0.20 U ug/L EPA 245.1 6/22/10 ESTAFFORD1
7440-09-7 K by ICP 0.1 • ` 3.1 mg/L EPA 200.7 6/30/10 ESTAFFORD1
Laboratory Section 1623 Mail Service Center,Raleigh,NC 27699-1623 [phone]
For a detailed description of the qualifier codes refer to hitn:nportel.ncdenr:om veb/yrodah/steft'a,fonechassist#Data Qualifier Codes<hhp://portal.ncdenr.onafwebMq/labislafhnfottechassish
4 _ . .,:. .f. 't.Page 1 of2

• NC OrWQ La6oratory Sectionsufts
Location ID: NC0004979 • Sample ID: ' AB59462 Collect Date: 06/08/2010 Collect Time:: 12:20
MET •
CAS# Analyte Name PQL Result/ Units Method Analysis Validated by
Qualifier Reference Date
7439-93-2 Li ICP 25 r. r: • 25 U ug/L EPA 200.7 6/30/10 ESTAFFORD1
7439-95-4 Mg by ICP • . 0:1.:. " 29 mg/L EPA 200.7 6/30/10 ESTAFFORD1
7439-96-5 Mn by ICP 10 300 ug/L EPA 200.7 6/30/10 ESTAFFORD1
7439-98-7 Mo by ICPMS 10 - 200 P ug/L EPA 200.8 6/21/10 ESTAFFORD1
7440-23-5 Na by ICP 0.1 6.7 mg/L EPA 200.7 6/30/10 ESTAFFORD1
7440-02-0 Ni by ICP 10 12 ug/L EPA 200.7• 7/14/10 ESTAFFORD1
7439-92-1 Pb by furnace _ 10 10 U ug/L EPA 200.9 6/24/10 ESTAFFORD1
7440-36-0 . Sb by ICPMS 10, 200 P ug/L EPA 200.8 6/21/10 ESTAFFORD1
7782-49-2 Se by furnace 5 25.P ug/L EPA 200.9 7/2/10 ESTAFFORD1
7440-31-5 Sn by ICPMS 10 200 P ug/L EPA 200.8 6/21/10 ESTAFFORD1
7440-28-0 Thallium(TI) ICPMS 10 200 P ug/L EPA 200.8 6/21/10 ESTAFFORD1
7440-32-6 Ti(Titanium)by ICP 10 _ • ,4 10 U • ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-62-2 V by ICP 25 25 U ug/L EPA 200.7 6/30/10 ESTAFFORD1
7440-66-6 Zn by ICPMS .10 31 ug/L EPA 200.8 7/2/10 ESTAFFORD1
Sample•Comments
G&O sample was preserved with NaOH instead of H2SO4. < •-
•
5 •
•
•
•
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•
. a. .
•
•
•
•
•
•
•
Q.St:
Laboratory Section»1623 Mail Service Center,Raleigh,NC 27699-1623 [phone] .
For a detailed description of the qualifier codes refer to htto:/Jnortal.ncdenr.oe/webtwm/aWstafiuiforlechassisntDete Qualifier Codes<hnoffaortal.nedenr•orcw+ebhmila0.`etaffmto/techassist>
•
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Page 2 of 2

V. .
C°Cdi •
law 4691
DIVISION OF WATER QUALITY (p-;.-
Chemistry Laboratory Report/Water Quality '-"""umber ,,,,
El SAMPLE TYPE Date Received: 10'1 r t
COUNTY : C- *340 n PRIORITY Time Received. 0g1A
RIVER BASIN: f fir.)ha El AMBIENT El QA STREAM A EFFLUENT Received By :
Ft.
REPORT TO : Anon e,5 I f Q Regional Office rt. COMPLIANCE g CHAIN OF CUSTODY E LAKE El INFLUENT
Ei ESTUARY Data Released :
* EMERGENCY VISIT ID il Date Reported
Other COLLECTOR(S) Y ► a AA),,'') n� '
t �( j1\1 �)�
•
Estimated BOO Range: /l/' -o 141 4 Station Location:��� iiiiiii J ILU 11Power
.��^/�
Seed: / Chlorinated: .'ry n Remarks: ` ' '3. / A// `� D C/�
S)ati n N/-oc tie,p Co�fg .^ D�/ 7 )' yyn/dtf Date End(yylmm/dd) Time Begin Time End Depth-D;/Uil,D13M Value Type-A,H,L C'nmpueile^I,S,13 Samp�7•ype
IAA\\ ,Oj /-�`,{ 'F/� [I ���� !j ,,l///+�qT—t L LrLitlh/�itu/n/i7`11T32 u!/L
BOD 310 my/L ><Chloride 940 mg/L NH3 as N 610 T4/
i COD High 340 mp/L TKN an N 625 nt8/L Mg-Magnesium 927 nit/L.
X COD Low 335 mt_/L —Chlorophyll a EPA 445 0 modified option ug/L NO2 plus NO3 as N 630 ntg/L1Mn-Mannegase 1055 ug/L\ Colifurm:MF Fecal 31616 /l0Oml P:Total as P 665 • mg/LNa-Sodium 929 mg/L
—
Coliform:MF Total 31504 /100m1 Color:True 80 c u. l 04 as P70507 m/LArsenic:fotul 1002 ug/l.
Coliform:tube Fecal 31615 /100m1 Color:(pH) 83 pH• c.u. P:Dissolved as P 666 mg/LSe-Selenium 1147 ug/L
Coliform:Fecal Strep 31673 /100m1 _Color:pH 7.6 82 c u. x K-Potassium mg/LHg-Mercury 71900 ug/L
Residue:Total 500 mg/L Cyanide 720 rt3/L x Cd-Cadmium 1027 ug/La-Barium ub'L
Volatile 505 mg/L X.Fluoride 951 mg/L Cr-Chromium:Total 1034 ug/L Organochlorine Pesticides
Fixed 510 mg/L Formaldehyde 71880 mg/L Cu-Copper 1042 ug/L Organophosphorus Pesticides
Residue:Suspended 530 mg/L .•Grease'and Oils 556 tng/L Ni-Nickel 1067 eg/L Organonitrogen Pesticides
Volatile 535 ntl/L Hardnest•Total 900 tng/L Pb-Lead 1051 ug/L Acid Herbicides
Fixed 540 mp/L Specific Cond.95 umhos/cm Zn-Zinc 1092 ug/L
pH 403 units MBAS 38260 ing/L V-Vanadium ug/L Buse/Neutral&Acid Extractable Organics
Acidity to pH 4.5 436 mp'L Phenols 32730 ug/L t Ag-Silver 1077 ug/L TPII Diesel Range
• Acidity to pH 8.3 435 mg/L Sulfate 945 mg/L Al-Aluminum 1105 41.
Alkalinity to pH 8.3 415 mgL Sulfide 745 mg/L xBe-Beryllium 1012 u}/I. Purgeable Organics(VOA bottle req'd)
Alkalinity to pH 4.5 410 mg/L 7C Boron
Ca-Calcium 916 rng/L TPI1 Gasoline Range
X.TOC 680 mg/L / `Tannin&Lignin ug/L. X,Co-Cobalt 1037 ug/L TPH/BTEX Gasoline Range
Turbidity 76 NTU Hexavalent Chromium ug/L Fe-Iron 1045 ug/L Phyarplankton
Coliform Total Tube /100 ml Bicarbonate n:E/L Mo-Molybdenum ug/L
Carbonate mg/L Sb-Antimony ug/L
Xin Total Dissolved Solids . /L Sn-Tin ug/L
TI-Thallium ug/L .
Ti•Titanium ug/L '�Q
Hg-1631 Ai/
ng/L Temporal r on arrival(°C): "�/
COMMENTS: wi
0) 1 Se

Aids,
NCDENR
North Carolina Department of Environment and Natural Resources .
Division of Water Quality
Beverly Eaves Perdue Coleen H.Sullins Dee Freeman
Governor Director Secretary
June 24, 2010 JUN 2 8
2010
Ron Lewis
Water Management, Duke Energy
EC13K
PO Box 1006 .
Charlotte, NC 28201-1006
Subject: Review of Duke Energy Carolinas, NPDES Permit NC0004979 (Lake Wylie-Allen Steam Station):
"Balanced and Indigenous Populations (BIP)Assessment Report—Supplemental Mayfly(Hexagenia spp.) and
Sediment Sampling, June 10, 2010".
Environmental Sciences Section (ESS) staff has reviewed Duke Energy's resample data for Hexagenia populations
and substrate analyses of Lake Wylie near the Allen Steam Station. This resampling of long-term stations for
Hexagenia populations and associated substrates in Lake Wylie was requested by ESS in a letter dated March 11,
2010 and in a subsequent conference call (April 6, 2010). These requests were made in an effort to reduce the
possibility of confounding factors in the interpretation of the Hexagenia data.
Based on a review of this additional data, ESS offers the following comments:
1) ESS concurs with Duke Energy's interpretation that substrate size is the primary limiting factor in explaining
Hexagenia distributions and densities. In general, the additional data supports the theory that the smaller
particle sizes are favoring increased densities of Hexagenia while larger particle sizes reduce (or exclude)
Hexagenia.
2) As expected, the earlier seasonal sampling produced record densities of Hexagenia although this was only
documented at Station A. This result is consistent with the emergence patterns of these mayflies and supports
the conclusion that fluctuating densities at some stations corresponding with later seasonal sampling dates is
primarily the result of emergence effects and not the result of abiotic effects. Therefore, it is recommended
that subsequent sampling be conducted within the mid-April or mid-May timeframe in an effort to ameliorate
these confounding effects.
3) The augmented dataset contained within the June 10, 2010 report suggest that there is no impairment due to
temperature or dissolved oxygen at the long-term monitoring stations and that these stations generally
support balanced and indigenous populations.
If you have any questions, please do not hesitate to contact Eric Fleek at eric.fleekOncdenr.ctov or at 919-743-
8469.
Sincerely,
Vk
Jay S uber
o_,
Chief, Environmental Sciences Section
cc: c ''
Jeff Poupart, Surface Water Protection Section
Sergei Chemikov, Surface Water Protection Section
Kathy Stecker, Planning Section
Alan Clark, Planning Section
Tom Belnick, Surface Water Protection Section
1621 Mail Service Center,Raleigh,North Carolina 27699-1621 One
Location:4401 Reedy Creek Road,Raleigh,North Carolina 27607 NorthCarolina
Phone:919-743-a4001 FAX:919-743,35171 Customer Service:1-877-623-6748 Naturally
http://h2o.enr.state.nc.uslesbl
An Equal Opportunity\Affirmative Action Employer

NCDENR
North Carolina Department of Environment and Natural Resources rtibt;4
Division of Water Quality
Beverly Eaves Perdue Coleen H.Sullins Dee Freeman
Governor Director Secretary
1 1 rinnn
iviay
Mr. Don Scruggs
Duke Power Company-Allen Steam Station
253 Plant Allen Road
Belmont,NC 28012
Subject: Compliance Evaluation Inspection
Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Gaston County,NC
Dear Mr. Scruggs:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the
subject facility on May 5 and 8, 2009 by John Lesley of this Office. Whole effluent samples were collected at
outfall 002 for use in a chronic Ceriodaphnia dubia pass/fail toxicity test. Toxicity test results will be
forwarded under separate cover when available.
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,
for Robert B. Krebs
Surface Water Protection
Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
JL
Mooresville Regional Office One
Location:610 East Center Ave.,Suite 301 Mooresville, NC 28115 NorthCarolina
Phone: [phone]\Fax:[phone]\Customer Service: 1-877-623-6748 Natural&
Internet:www.ncwaterquality.org
An Equal Opportunity\Affirmative Action Employer—50%Recycled/10%Post Consumer paper

United States Environmental Protection Agency Form Approved.
EPA Washington,D.C.20460 OMB No.2040-0057
Water Compliance Inspection Report Approval expires 8-31-98
Section A: National Data System Coding(i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 I N� 2 ( 5i 31
NC0004979 111 121 09/05/05 117 181...J 191 c1 201.j
1J V Remarks !J
211III 1111lIlI III1II11IIII IlII I I I I II1I IIII1I1IIII6e
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA Reserved-------------------
4
671 3.0 169 70 � 71 W Du 72I N I 731 1 1 74 75) I I I I I 1 1 80
!!--�! Section B: Facility Data
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number)
10:00 AM 09/05/05 06/10/01
Plant Allen Steam Station
NCSR 2525 Exit Time/Date Permit Expiration Date
Belmont NC 28012 03:00 PM 09/05/05 10/05/31
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data•
///
Donald Lynn Scruggs/ORC/704-829-2423/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Jimmie Allen Stowe,526 S Chruch St Charlotte NC No
282011002//704-382-4309/7043829840
Section C: Areas Evaluated During Inspection(Check only those areas evaluated)
III Permit III Flow Measurement •Operations&Maintenance a Records/Reports
II Self-Monitoring Program a Facility Site Review ll Effluent/Receiving Waters
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Signature(s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date
John E Lesley�� MRO WQ//704-663-1699 Ext.2198/ S///l D Cf
,,,..,Dv1/4._ y (........6
Si nature of Management Q A ev'e er Agency/Office/Phone and Fax Numbers Datet 1 ) ^9
Marcia llocco MRO WQ//704-663-1699 Ext.2204/ -2-�JI
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

NPDES yr/mo/day Inspection Type 1
31 NC0004979 111 121 09/05/05 1
17 18' '
Section D: Summary of Finding/Comments(Attach additional sheetsof narrative and checklists as necessary)
Page# 2

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 05/05/2009 Inspection Type: Compliance Evaluation
Operations& Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ n n n
Does the facility analyze process control parameters,for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge 0 0 ■ 0
Judge, and nthar that are applicable?
Comment: The facility is currently classified as a physical/chemical facility, pH is used
as a process control measure. A new treatment system has been constructed to treat
the air scrubber water which is discharged via internal outfall 005. The treatment
system consists of flow equalization, three reactor tanks (chemical precipitation), pH
adjustment, sand filters, biological treatment (2 stage biofiltration), clarification, sludge
storage, and sludge dewatering. The system is operated under contract by Siemens
Water Technologies Corporation. Process control measures include pH, COD, and
settleability testing.
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? ■ n n n
Is the facility as described in the permit? ■ n n n
#Are there any special conditions for the permit? ■ n n n
Is access to the plant site restricted to the general public? ■ n n n
Is the inspector granted access to all areas for inspection? ■ n n n
Comment: •
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? ■ n n n
Is all required information readily available, complete and current? ■ n n n
Are all records maintained for 3 years(lab. reg. required 5 years)? 1. 000
Are analytical results consistent with data reported on DMRs? ■ n n n
Is the chain-of-custody complete? ■ n n n
Dates,times and location of sampling ■
Name of individual performing the sampling ■
Results of analysis and calibration ■
Dates of analysis ■
Name of person performing analyses ■
Transported COCs ■
Are DMRs complete:do they include all permit parameters? ■ n n n
Has the facility submitted its annual compliance report to users and DWQ? n n ■ n
(If the facility is=or>5 MGD permitted flow) Do they operate 24/7 with a certified operator on each shift? ■ n n n
Page# 3

r°
Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 05/05/2009 Inspection Type: Compliance Evaluation
Record Keeping Yes No NA NE
Is the ORC visitation log available and current? • 0 n 0
Is the ORC certified at grade equal to or higher than the facility classification? N n n n
Is the backup operator certified at one grade less or greater than the facility classification? ■ n n n
Is a copy of the current NPDES permit available on site? • n n n
Facility has copy of previous year's Annual Report on file for review? 0 0 • 0
Comment: The new biological WWTP (internal outfall 005) is operated 24/7 by
Siemens Water Technologies Corportation staff.
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? N n n n
Are the receiving water free of foam other than trace amounts and other debris? • n n n
If effluent (diffuser pipes are required) are they operating properly? n n • n
Comment:
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? 0 0 • 0
Is composite sampling flow proportional? 0 0 • 0
Is sample collected below all treatment units? 111000
Is flow meter calibrated annually? 0 0 • 0
Is proper volume collected? • n n n
Is the flow meter operational? n n ■ n
Is the tubing clean? ■ n n n
(If units are separated)Does the chart recorder match the flow meter? n0 . 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? I 0 0 0
• Comment: Flow measurement is take by pump log readings and staff guage
readings. Flow measurement is recorded for internal outfall 005.
Is the facility sampling performed as required by the permit(frequency, sampling type representative)? • n n n
Comment: The facility was collecting a composite sample for priority pollutants
analyses in accordance with requirements in the facility's NPDES Permit. Grab
samples are required for all other sampling.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? ■ ❑ ❑ n
Are all other parameters(excluding field parameters)performed by a certified lab? ■ n ❑ n
Page# 4

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 05/05/2009 Inspection Type: Compliance Evaluation
Laboratory Yes No NA NE
#Is the facility using a contract lab? • 0 0 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ 0 0 0
Incubator(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? DUNU
Incubator(BOD)set to 20.0 degrees Celsius+/- 1.0 degrees? 0 0 • 0
Comment: On-site lab is certified for pH only. Certificate No. 5134. The Duke Energy
Environmental Lab conducts all other analyses. Environmental Testing Solutions is
subcontracted to perform toxicity testing.
Upstream /Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit(frequency,sampling type, and sampling location)? 0 0 • 0
Comment:
Page# 5

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins • Dee Freeman
Governor Director Secretary
January 13, 2010
JAN 1 9 2010
Allen Stowe
Water Management, Duke Energy
EC13K
PO Box 1006
Charlotte, NC 28201-1006
Subject: Review of Duke Energy Carolinas, NPDES Permit NC0004979, "Assessment of Balanced and
Indigenous Populations in Lake Wylie near Allen Steam Station", November 2009.
Environmental Sciences Section staff have reviewed the subject document which was received on December 03, 2009.
Eric Fleek, Debra Owen, and Bryn H. Tracy reviewed the sections on macroinvertebrates, water quality monitoring, and
fish, respectively. The power plant operates under an DWQ-and EPA-approved Clean Water Act§316(a)thermal
variance. By agreement with the Department of Environment and Natural Resources(NCDENR), Duke Energy conducts
annual monitoring of Lake Wylie in the vicinity of the Allen Steam Station to support NPDES Permit NC0004979:
1. Part A. (1) Effluent Limitations and Monitoring Requirements (outfall 001)--"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;and
2. Part A. (12) Section 316 (b)of the CWA(Clean Water Act)—"The permittee shall comply with the Cooling Water
Intake Structure Rule per 40 CFR 125.95'.
The report fulfills the permit obligations for reporting the results of the biological monitoring. Based on a review of the
current data, it is our opinion that the Allen Steam Station is unlikely in having an impact to the fish community in Lake
Wylie and that the fish community currently qualifies as a balanced and indigenous. Despite the fact that the fish
assemblage in this multi-purpose reservoir is comprised of indigenous and nonindigenous species(Tables 5-1 and 5-2 on
pages 5-6 and 5-7 of the report), the Clean Water Act§316(a) does allow for balanced and indigenous communities to". .
. include historically non-native species introduced in connection with a program of wildlife management and species
whose presence or abundance results from substantial, irreversible environmental modification"(40CFR 125.71(c)).
We do have one concern regarding the benthic macroinvertebrate community and would appreciate receiving a written
response to this concern, before an determination can be made as to whether or not the power plant is having an impact
on the benthic community and if the benthic community is balanced and indigenous. We also have one comment and
three analysis requests for future reports.
Concern
There appears to be a very large discrepancy in the mean and total abundance of the burrowing mayfly Hexagenia spp.
between Station A(upstream of Allen Steam Station), Station B(at Allen Steam Station), and Station C (below Allen
Steam Station) (Figure 1). Indeed, Hexagenia spp. were collected at every sampling effort from 2000-2008 at Station A,
but only collected twice (2000 and 2006)at Station B, and on four occasions (2001, 2004, 2005, and 2007)at Station C.
Hexagenia spp. have been reliably demonstrated to be sensitive to low dissolved oxygen (Britt 1955, Beeton 1961,
Beeton 1969, Verduin 1964, Carr and Hiltunen 1965, Krieger et al. 1996, Edsall et al. 1999, Edsall 2001, Edsall and
Phillips 2006), sensitive to metals and petroleum products (Edsall et al. 1991 and Schloesser et al. 1991)and have long
been recognized as pollution intolerant organisms and reliable indicators of overall healthy aquatic conditions(Bertram
and Statler-Salt 1998, Edsall 2001). Therefore, the discrepancy in the densities of these organism between stations is
concerning and requires additional explanation since it appears that these discrepancies are not the result of seasonal,
depth, or substrate differences among sites.
1621 Mail Service Center,Raleigh,North Carolina 27699-1621 One
Location:4401 Reedy Creek Road,Raleigh,North Carolina 27607 North Carolina
Phone:[phone] FAX:[phone] Customer Service:1-877-623-6748 Naturally
htto://h2o.enr.state.nc.uslesW
An Equal Opportunity 1 Affirmative Action Employer

Allen Stowe
January 136, 2010
Page 2
xI -
a I
• a
c
3 200
.48
2003 2001 2002 2033 2004 2025 2026 2007 2008 WAN TOTAL
DEWY msm
■Station A(Uplake of Allen Stream Station)■Station B(At Allen Steam Station)o Station C(Downlake of Allen Steam Station)I
Figure 1. Annual, mean and total Hexagenia spp. density
by station, Lake Wylie near Allen Steam Station.
Comment
Page 3-2, paragraph 1, line 4: The State of North Carolina does not currently have either a water quality action level or
standard for nutrients. In addition, Dutchmans Creek, South Fork Catawba River, Withers Cove, and Crowders Creek are
not considered by DWQ to be "nutrient impaired"-streams (i.e. on the §303 (d) list of impaired waters for nutrients).
Perhaps there is an alternative choice of word here to describe the nutrient status of these waters that may be clearer.
This term was also used in the conclusions on page 3-4.
Analysis Requests
For the 2014 report, it would also be advantageous if you could provide additional information to aid in our interpretation of
the data:
1. In addition to Tables 4-1 through 4-4, please include a taxonomic table comparing taxa occurrences for the
current sampling year for each station so that a direct side-by-side comparison can be more easily conducted.
Please see Table 1 as an example.
2. In addition to Figures 4-1 through 4-5, please include the following graphs for each station and year (in the
same format as currently presented) for the following groups: Non-Chironomid Diptera, Ephemeroptera,
Plecoptera, Trichoptera, Coleoptera, Odonata, Megaloptera, Crustacea, and Mollusca. Again, this will allow
for a more direct side-by-side comparison for each station and each taxonomic group.
3. In addition, please report EPT taxa richness and EPT for each station going forward. These metrics can be
reported in accordance with current graphical formats.
Table 1.
Waterbody Licklog Branch Sugarloaf Creek Scott Creek
Date 8/9/2007 8/9/2007 8/9/2007
Location SR 1706 off SR 1708 off SR 1556
County Jackson Jackson Jackson
Taxon
Ephemeroptera
Acentrella spp R
Plauditus dubius gp. C A
Baetis flavistriga R
Pseudocloeon propinquum R

Allen Stowe
January 13,2010
Page 3
If you have any questions, please do not hesitate to contact me or my staff.
Yours truly,
eter Caldwell for Jay Sauber
Acting Chief, Environmental Sciences Section
cc: Eric Fleek, Environmental Scien
KINININgalgtrYPLKIIMIRLIIP ice
Debra Owen, Environmental Sciences Section
Jeff Poupart, Surface Water Protection Section
Bryn H. Tracy, Environmental Sciences Section
Charles Weaver, Surface Water Protection Section
References Cited
Beeton, A.M. 1961. Environmental changes in Lake Erie. Trans. Am. Fish. Soc. (90): 153-159.
. 1969. Changes in the environment and biota of the Great Lakes. In: Eutrophication: Causes, Consequences, and
Correctives. National Academy of Sciences. Washington, D.C., pp. 150-187.
Bertram, P. and N. Statler-Salt. 1998. Selection of indicators for Great Lakes basin ecosystem health. State of the Lakes
Ecosystem Conference 1998. Buffalo, New York. U.S. Environ. Protect. Agency, Chicago, Ill, and Environment
Canada, Burlington, Ont.
Britt, N.W. 1955. Stratification in western Lake Erie in summer 1953: effects on the Hexagenia(Ephemeroptera)
population. Ecology(36): 39-244.
Carr, J.F. and J.K. Hiltunen. 1965. Changes in the bottom fauna of western Lake Erie from 1950 to 1961. Limnol.
Oceanogr. (10): 551-569.
Edsall, T.A. 2001. Burrowing mayflies(Hexagenia)as indicators of ecosystem health. Aquatic Ecosystem Health and
Management(4): 283-292.
, B.A. Manny, D.W. Schloesser, S. J. Nichols, and A. M. Frank. 1991. Production of Hexagenia limbata nymphs in
contaminated sediments in the Upper Great Lakes Connecting Channels. Hydrobiologia (219): 353-361.
Edsall, T.A., C.P. Madenjian, and B.A. Manny. 1999. Burrowing mayflies in Lake Erie—a review. In: M. Munawar, T.
Edsall, I.F. Munawar, (Eds), The State of Lake Erie: Past, Present, and Future, Ecovision World Monograph
Series, Backhuys Publishers, The Netherlands, pp. 219-231.
Edsall, T.A. and W. E. Phillips. 2006. Burrowing mayflies(Hexagenia) as indicators of aquatic ecosystem health at
Sleeping Bear Dunes National Lakeshore, Michigan. Park Science Volume 23(1).
Krieger, K.W., D.W. Schloesser, B.A. Manny, C.E. Trisler, S.E. Heady, J.H. Ciborowski, and K.M. Muth. 1996. Recovery
of burrowing mayflies(Ephemeroptera: Ephemeridae: Hexagenia) in western Lake Erie. J. Great Lakes Res. (22):
254-263.
Schloesser, D.W., T.A. Edsall, B.A. Manny, and S.J. Nichols. 1991. Distribution of Hexagenia nymphs and visible oil in
contaminated sediments in the Upper Great Lakes Connecting Channels. Hydrobiologia (219): 345-352.
Verduin, J. 1964. Changes in western Lake Erie during the period 1948-1962. Verhandl. Intern. Ver. Limnol. (15): 639-
644.

44:74A,
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins ;- r , --
Governor Director ` Dee"Freeman'.
,. . l Secretary
March 10, 2010 MAR 1 5 2010
Mr. Ronald E.Lewis
Duke Energy Company
Mail Code: EC 13K r' •
526 S.Church Street ,, '
Charlotte,NC 28202
Subject: Authorization to Operate
Cooling Water Intake Structure
NPDES Perm...Mr
Duke Power/Allen Steam Station
Gaston County
Dear Mr. Lewis:
This letter approves your request to operate a permanent supplemental cooling water pumping system during the months
July-September at the Allen Steam Station plant. This supplemental cooling water pumping system was previously
approved as a temporary system(letter dated May 22,2008)and operated in August/September 2008.
This permanent pumping plan has been proposed to ensure uninterrupted power production at this baseload facility,while
mitigating effects on the aquatic community and downstream users. The system is authorized to be implemented with the
following operational and design measures to minimize water quality and biological impacts:
• The permanent supplemental cooling water pumping system will operate from July through September on an as-
needed basis.
• Nine floating intake pipes with pumps designed to withdraw at a through screen velocity at or below 0.5 fps across
screening with 3/8 inch mesh openings to minimize fish entrainment and impingement.
• The system will pump at a rate up to 60,000 gpm(86.4 MGD).
• The intake pipes will pump water from the Catawba River to the condenser cooling water(CCW)discharge canal,
which then flows to the South Fork Catawba River.
• During operation of the supplemental cooling water system,calculation of Allen Steam Station's CCW discharge
temperature for Outfall 001 will be modified to include the temperature of the supplemental cooling water
pumping system based on the system flow and Allen Steam Station's CCW intake temperatures,as was done in
2008.
• For protection of public recreation within Lake Wylie,warning buoy/signage will be placed near the intake area.
• The floating intake lines and buoys will be removed from the lake and stored onsite between October-June.
1617 Mail Service Center,Raleigh,North Carolina 27699-1617
Location:512 N.Salisbury St.Raleigh,North Carolina 27604 One
Phone:[phone];FAX:[phone] Customer Service:1-877-623-6748 NorthCarolina
Internet:www.ncwaterquality.org Naturally Equal Opportunity 1 Affirmative Action Employer

• The facility will perform routine monthly lake monitoring during the period of pumping to assess limnological
conditions in the Catawba River. During July-September,thermal and DO profiles will be taken in the vertical
water column at designated downstream sampling locations.
Please note that this authorization does not affect the legal requirements to obtain other permits which may be required by
the Division of Water Quality,the Division of Land Resources,the Coastal Area Management Act, or any other federal or
local government permits.
If you have any questions on this approval or general NPDES questions,please contact me at 919-807-6390.
Sin rely,
m Belnick
Supervisor,Western NPDES Program
Cc: NPDES Permit File
Central Files
1r
1617 Mail Service Center,Raleigh,North Carolina 27699-1617
Location:512 N.Salisbury St.Raleigh;North Carolina 27604 One
Phone:[phone] FAX:[phone]\Customer Service:1-877-623-6748 NorthCarolina
Internet:www.nnity t Affirmative
www.ncwaterquality.org
c Naturally
An Equal Opportunity:Affirmative Action Employer L

e N
INSPECTION REPORT ROUTING SHEET
To be attached to all inspection reports in-house only.
Laboratory Cert. #: 5134
Laboratory Name: Duke Power Co. Allen Steam Station
Inspection Type: Field Maintenance
Inspector Name(s): Chet Whiting
Inspection Date: November 30, 2009
Date Report Completed: January 13, 2010
Date Forwarded to Reviewer: January 22, 2010
Reviewed by: Jason Smith
Date Review Completed: January 25, 2010
Cover Letter to use: _ Insp. Initial _ Insp. Reg. X Insp. No Finding _ Insp. CP
Unit Supervisor: Gary Francies
Date Received: 1/25/2010 Date Forwarded to Alberta: 1/25/2010 GAS
Date Mailed:

/R _A • r
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director Dee Freeman
Secretary
January 26, 2010
5134
Mr. Rodney Wike
Duke Power Co. Allen Steam Station
13339 Hager's Ferry Road
Huntersville, NC 28078-7929 .
SUBJECT: North Carolina Wastewater/Groundwater Laboratory Certification (NC WW/GW LC)
Maintenance Inspection
.-' Dear Mr. Wike:
, ;, Enclosed is a report for the inspection performed on November 30, 2009 by Mr. Chet Whiting. No findings are
.. . cited in this report, a response is not required. We appreciate the fine job you and your staff are doing. As a
:�.r certification requirement, your laboratory must continue to carry out the requirements set forth in 15A NCAC
,;* 2H .0800.
14Copies of the checklists completed during the inspection may be requested from this office. Thank you for your
cooperation during the inspection. If you wish to obtain an electronic copy of this report by email, or if you have
.
l e
questions or need additional information please contact me at 828-296-4677.
i
Sincerely,
Gary Francies
Unit Supervisor
Laboratory Section
cc: Mooresville Regionai Offioo.
Chet Whiting
DENR DWQ Laboratory Section NC Wastewater/Groundwater Laboratory Certification Branch One 1
1623 Mail Service Center,Raleigh,North Carolina 27699-1623 North Carolina
Location:4405 Reedy Creek Road.Raleigh,North Carolina 27607-6445
Phone:[phone] FAX:[phone] atitre,
Internet www.dwglab.org . •
An Equal Opportunity\Affirmative Action Employer Customer Service:1-877-623-6748 www.ncwaterquality.org

On-Site Inspection Report
LABORATORY NAME: Duke Power Co. Allen Steam Station
NPDES PERMIT#: NC0004979
ADDRESS: Duke Power Company LLC
13339 Hager's Ferry Road
Huntersville, NC 28078-7929
CERTIFICATE#: 5134
DATE OF INSPECTION: November 30, 2009
TYPE OF INSPECTION: Field Maintenance
AUDITOR(S): Chet Whiting
LOCAL PERSON(S) CONTACTED: Rodney Wike
I. INTRODUCTION:
This laboratory was inspected to verify its compliance with the requirements of 15A NCAC 2H .0800 for
the analysis of environmental samples.
II. GENERAL COMMENTS:
The laboratory has been proactive in its approach to certification; the analysis of recommended post
calibration pH checks is one example. The laboratory has also implemented a system of traceability for
consumables well before it was required by North Carolina Wastewater/Groundwater Laboratory
Certification policy.
III. FINDINGS, REQUIREMENTS, COMMENTS AND RECOMMENDATIONS:
General Laboratory
Comment: The name of the vendor/manufacturer was not included as part of consumable tracking.
North Carolina Wastewater/Groundwater Laboratory Certification document, Quality Assurance
Policies for Field Laboratories states: "All chemicals, reagents, standards and consumables used by
the laboratory must have the following information documented: Date received, Date Opened (in use),
Vendor, Lot Number, and Expiration Date. A system (e.g., traceable identifiers) must be in place that
links standard/reagent preparation information to analytical batches in which the solutions are used.
Documentation of solution preparation must include the analyst's initials, date of preparation, the
volume or weight of standard(s) used, the solvent and final volume of the solution. This information as
well as the vendor and/or manufacturer, lot number, and expiration date must be retained for primary
standards, chemicals, reagents, and materials used for a period of five years. Consumable materials
such as pH buffers and lots of pre-made standards are included in this requirement". This item was
corrected on-site during the inspection. No further response is necessary for this finding.

Pril
. •Page 2
Lab#5134 Duke Power Co.Allen Steam Station
al—Standard Methods, 18th Edition, 4500 H+ B
Comment: The laboratory is performing Automatic Temperature Compensator (ATC) check for the pH
meter. This is no longer a program requirement and may be discontinued.
IV. PAPER TRAIL INVESTIGATION:
The paper trail consisted of comparing field testing records and contract lab reports to Discharge
Monitoring Reports (DMRs) submitted to the North Carolina Division of Water Quality. Data were
reviewed for Allen Steam Station (NPDES permit # NC0004979) for August and September, 2009. No
transcription errors were detected. The facility appears to be doing a good job of accurately
transcribing data.
V. CONCLUSIONS:
All findings noted during the inspection were adequately addressed prior to the completion of this
report. The inspector would like to thank the staff for its assistance during the inspection and data review
process. No response is required.
Report prepared by: Chet Whiting Date: January 13, 2010
Report reviewed by: Jason Smith Date: January 25, 2010

r,A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality "" ""'a
Beverly Eaves Perdue Coleen H.Sullins z � . Dt'e Fr man
Governor Director "'� r retary
May 6, 2009
Mr. Steven Immel, General Manager II
Duke Energy Carolinas, LLC-Allen Steam Station DWQ-Surface Water Pitii'Cicli0n
253 Plant Allen Road.
Belmont, North Carolina 28012
Subject: Draft NPDES Permit
Permit No. NC0004979
Allen Steam Station
Gaston County
Dear Mr. Immel:
The Division of Water Quality (DWQ) has received your request for a major modification of
the above referenced facility. The request was for the elimination of the selenium limit at Outfall
002.
The draft permit authorizes Duke Energy Carolinas, LW to discharge treated industrial
wastewater from the Allen Steam Station Wastewater Treatment Plant to the Catawba River and
the South Fork Catawba River, class WS-IV and B waters in the Catawba River Basin. The draft
permit includes discharge limitations/or monitoring for flow, oil and grease, total suspended
solids, arsenic, chloride, copper, iron, mercury, nickel, selenium, zinc, total nitrogen, total
phosphorus, pH, and chronic toxicity.
The following modifications have been made to the draft permit:
• The weekly average effluent limit for selenium at Outfall 002 has been deleted. Data
analysis indicated that there was no reasonable potential for this parameter to exceed the
water quality standard in the receiving stream. There will be monthly monitoring of total
selenium at both Outfall 002 and internal outfall 005.
• Due to the new wastestream from the Flue Gas Desulfurization WWTP that will be
discharged into the ash settling basin above Outfall 002, quarterly monitoring for the
following parameters will now be required at Outfall 002: total arsenic, total cadmium,
total chromium, chloride, total mercury, total nickel, total silver, total zinc, and total
beryllium. Quarterly monitoring for these parameters is the minimum requirement for a
major industrial discharger to North Carolina streams.
1617 Mail Service Center,Raleigh,North Carolina 27699-1617
Location:512 N.Salisbury St.Raleigh,North Carolina 27604 One
Phone:[phone]\FAX:[phone]\Customer Service:1-877-623.6748 NorthCarolina
Internet www.ncwaterquality.org Naturally Equal Opportunity\Affirmative Action Employer

Letter to Mr. Immel
Page 2
• Please note that there have been minor language changes and the addition of a new
paragraph regarding data submittal in special condition A.14. Chronic Toxicity Pass/Fail
permit limit. (The new paragraph is located second from the end of the condition).
At this time, the Division is submitting a notice to the newspapers of general circulation
in Gaston County, inviting comments from you or your representative, the public and other
agencies on the draft permit. The notice should be published on or about May 12, 2009.
Following a 30-day comment period, we will review all pertinent comments received and take
appropriate action on the permit issuance.
Please provide written comments on the draft permit no later than June 12, 2009. If
you have any questions or need additional information, please contact me at telephone
number [phone] or jackie.nowell©ncmail.net.
Si erely,
acq yn M. o ell
NPD Western ogram
cc: EPA Region IV (draft, factsheet, RPA)
Allen Stowe/Duke Energy Corp. Allen Steam Station 253 Plant Allen Road
Belmont, NC 28012 (draft, factsheet, RPA)
/Surface Water Protection Section (draft, factsheet, RPA)
DEH/ Public Water Supply Section/Mooresville Regional Office (draft)
Aquatic Toxicology Unit (draft)
NPDES File/NC0004979

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
DRAFT 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 Energy Corporation
is hereby authorized to discharge wastewater from a facility located at the
Plant Allen Steam Station
253 Plant Allen Road (NCSR 2525)
Belmont
Gaston County
to receiving waters designated as the Catawba and South Fork Catawba Rivers in the
Catawba River Basin in accordance with effluent limitations,monitoring requirements, and
other conditions set forth in Parts I,II,III and IV hereof.
This permit shall become effective 00000C.
This permit and authorization to discharge shall expire at midnight on May 31,2010.
Signed this day XXXXXXXXXXXXXXXXXXXXXX.
DRAFT
Coleen H.Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0004979
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility,whether for operation or discharge are hereby revoked.As of
this permit issuance,any previously issued permit bearing this number is no longer effective.Therefore,the
exclusive authority to operate and discharge from this facility arises under the permit conditions,requirements,
terms,and provisions included herein.
Duke Energy Corporation is hereby authorized to:
1. Continue to discharge:
• Once through cooling water(outfall 001)
• Operate a septic tank and ash pond with pH adjustment and discharge domestic
wastewater,stormwater runoff,ash sluice,water treatment system wastewaters,FGD
system blowdown,landfill leachate,and miscellaneous cleaning and maintenance
wash waters (002).
• Coal yard sump overflow (002A) and power house sump overflow (002B)
• Miscellaneous equipment non-contact cooling and sealing water (003)
• Miscellaneous non-contact cooling water,vehicle washwater,and intake screen
backwash(004)
From a facility located at the Plant Allen Steam Station on Plant Allen Road(NCSR 2525),
south of Belmont in Gaston County,and
2. Without adding detergents or chemicals of any kind,discharge Asiatic clam/debris filter
backwash (of the intake filter screen) (see Part A.7);and
3. Continue to operate a FGD wet scrubber wastewater treatment system discharging to the ash
settling basin through internal outfall 005;and
4. Discharge from said treatment works at the location specified on the attached map into the
Catawba River(outfalls 002,002A,002B and 004) and the South Fork Catawba River(outfalls
001 and 003)which are classified Class WS-V B waters,respectively,in the Catawba River
Basin.
2

Permit NC0004979
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 001)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 001-Condenser Cooling Water(CCW). Such discharges shall be limited
and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow Daily Pump Logs Effluent
Temperature 38.9°C Daily Grab or Effluent
(June 1-September 30)1 (102°F) Instantaneous
Temperature 35°C Daily Grab or Effluent
(October 1-May 31)1 (95°F) Instantaneous
Notes:
1. 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.
Chlorination of the once through condenser cooling water,discharged through outfall 001,is not allowed
under this permit. Should Duke Power wish to chlorinate its condenser cooling water,a permit
modification must be requested and received prior to commencing chlorination.
3

r'
Permit NC0004979
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 002—ash pond effluent. Such discharges shall be limited and monitored
by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Weekly Daily Measurement Sample Type Sample Location
Average Average Maximum Frequency
Flow Weekly Instantaneous Influent or
or Estimate Effluent
Oil and Grease 15.0 mg/1 20.0 mg/1 Quarterly Grab Effluent
Total Suspended Solids 30.0 mg/1 100.0 mg/1 Monthly Grab Effluent
Total Copper2 1.0 mg/1 2/Month Grab Effluent
Total Iron 1.58 mg/1 Monthly Grab Effluent
Total Selenium2 Monthly Grab Effluent
Total Arsenic2 Quarterly Grab Effluent
Total Cadmium2 Quarterly Grab Effluent
Total Chromium2 Quarterly Grab Effluent
Chloride Quarterly Grab Effluent
Total Mercury2 Quarterly Grab Effluent
Total Nickell Quarterly Grab Effluent
Total Silver2 Quarterly Grab Effluent
Total Zinc2 Quarterly Grab Effluent
Total Beryllium Quarterly Grab Effluent
Total Nitrogen
(NO2+NO3+TKN) Semi-annually Grab Effluent
Chronic Toxicity' Quarterly Grab Effluent
pH3 Monthly Grab Effluent
Notes:
1. Whole Effluent Toxicity shall be monitored by chronic toxicity(Ceriodaphnia)P/F at 24%. Tests shall be
conducted in January,April,July and October(see Part A.(9.)for details)
2. Total metals are defined by 40 CFR 136. Any method specified by 40 CFR 136 is considered acceptable for
analysis.
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or foam visible in other than trace amounts.
4

Permit NC0004979
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002A)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 002A—Coal Yard Sump Overflows. Such discharges shall be limited and
monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow Episodic Estimate Effluent'
pH Episodic Grab Effluent
Oil and Grease2 15.0 mg/1 20.0 mg/1. Episodic Grab Effluent
Total Suspended Solids2 30.0 mg/1 100.0 mg/1 Episodic Grab Effluent
Fecal Coliform Episodic Grab Effluent
Total Iron3 1.0 mg/1 Episodic Grab Effluent
Notes:
1. Effluent sampling shall be conducted at a point upstream of discharge to the receiving stream.
2. Monthly average limits for total suspended solids and oil and grease only apply if the overflow occurs for
more than 24 hours.
3. Sampling for iron is required only when TSS is reported as greater than 100 mg/L.
There shall be no discharge of floating solids or foam visible in other than trace amounts
All flows shall be reported on monthly DMRs. Should no flow occur during a given month,the words"no
flow"should be clearly written on the front of the DMR. Episodic sampling is required per occurrance
when sump overflows occur for longer than one hour. All samples shall be of a representative discharge.
5

Permit NC0004979
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002B)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 002B—Power House Sump Overflows. Such discharges shall be limited
and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type • Sample Location
Average Maximum Frequency
Flow Episodic Estimate Effluents
pH Episodic Grab Effluent
Oil and Grease2 15.0 mg/1 20.0 mg/1 Episodic Grab Effluent
Total Suspended Solids2 30.0 mg/1 100.0 mg/1 Episodic Grab Effluent
Total Copper3 1.0 mg/1 Episodic Grab Effluent
Total Iron3 1.0mg/1 Episodic Grab Effluent
Notes:
1. Effluent sampling shall be conducted at a point upstream of discharge to the receiving stream.
2. Monthly average limits for total suspended solids and oil and grease only apply if the overflow occurs for
more than 24 hours.
3. The limits for total copper and total iron only apply during a chemical metals cleaning.
There shall be no discharge of floating solids or visible foam in other than trace amounts
All flows shall be reported on monthly DMRs. Should no flow occur during a given month,the words"no
flow"should be clearly written on the front of the DMR. Episodic sampling is required per occurrence
when sump overflows occur for longer than one hour. All samples shall be of a representative discharge.
6

Permit NC0004979
A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 003)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 003—miscellaneous equipment non-contact water and sealing water.
Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
ERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow Weekly Estimate Effluent
Chlorination of the once through cooling water,discharged through outfall 003,is not allowed under this
permit. Should Duke Power wish to chlorinate its once through cooling water,a permit modification must
be requested and received prior to commencing chlorination.
A. (6.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 004)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 004-miscellaneous non-contact cooling water,vehicle washwater,and
intake screen backwash. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow Weekly Estimate Effluent
Oil and Grease 15.0 mg/1 20.0 mg/1 Quarterly Grab Effluent
Chlorination of the once through cooling water,discharged through outfall 004,is not allowed under this
permit. Should Duke Power wish to chlorinate its condenser cooling water,a permit modification must be
requested and received prior to commencing chlorination.
7

Permit NC0004979
A. (7.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Internal
Outfall 005)
During the period beginning on the effective date of this permit and lasting until permit expiration,the
Permittee is authorized to discharge from internal outfall 005-treated FGD wet scrubber wastewater to ash
settling basin. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Locations
Pump logs or
Flow Monitor&Report Monthly similar Effluent
readings
Total Suspended Solids Monitor&Report Weekly Grab Effluent
Carbonaceous Oxygen Demand Monitor&Report Weekly Grab Effluent
(COD)
Total Arsenic Monitor&Report Weekly Grab Effluent
Total Cadmium Monitor&Report Weekly Grab Effluent
Total Chromium Monitor&Report Weekly Grab Effluent
Chloride Monitor&Report Weekly Grab Effluent
Total Mercury Monitor&Report Weekly Grab Effluent
Total Nickel Monitor&Report Weekly Grab Effluent
Total Selenium Monitor&Report Monthly Grab Effluent
Total Silver Monitor&Report Weekly Grab Effluent
Total Zinc Monitor&Report Weekly Grab Effluent
Total Beryllium Monitor&Report Weekly Grab Effluent
Notes:
1. "Effluent"shall be defined as the discharge from the FGD wastewater treatment system prior to discharge
to the ash settling basin.
All flows shall be reported on monthly DMRs. Should no flow occur during a given month,the words"no
flow"shall be clearly written on the front of the DMR. All samples shall be of a representative discharge.
DMRs for this outfall shall be submitted only after discharge commences from the FGD system.
Sampling is only required when this outfall is discharging.
A. (8.) SPECIAL CONDITION FOR THE DISCHARGE OF ASIATIC CLAM/DEBRIS
FILTER BACKWASH
The permittee may backwash the intake filter for Unit 5 condenser cooling water on an as-needed basis. It is
understood that this wash water will contain materials indigenous to the Catawba River such as Asiatic clams
and light debris. As these are naturally occurring in the river environment,they may be discharged with no
adverse affects to the receiving stream. The Permittee may not add any detergent,chemicals or other non-
indigenous material to the wash water without explicit permission of the Division of Water Quality.
8

.
•
Permit NC0004979
A. (9.) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 24%.
The permit holder shall perform at a minimum,quarterly monitoring using test procedures outlined in the"North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised February 1998,or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-February 1998)or subsequent
versions.The tests will be performed during the months of January,April,July and October. Effluent sampling for
this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit,then multiple-concentration testing shall be performed at a minimum,in each of the two following months
as described in"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-February
1998)or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival.The definition of"detectable impairment,"collection
methods,exposure regimes,and further statistical methods are specified in the"North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure"(Revised-February 1998)or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form(MR-1) for the months in which tests were performed. If reporting pass/fail
results using the parameter code TGP3B, DWQ Form AT-1 (original) is sent to the below address. If
reporting Chronic Value results using the parameter code THP3B, DWQ Form AT-3 (original) is to be sent
to the following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete,accurate,include all supporting chemical/physical measurements and all
concentration/response data,and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,the
permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating the facility
name,permit number,pipe number,county,and the month/year of the report with the notation of"No Flow"in the
comment area of the form.The report shall be submitted to the Environmental Sciences Branch at the address cited
above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream,this permit may be re-opened and modified to include
alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such
monitoring shall be included in the calculation&reporting of the data submitted on the DMR&all AT
Forms submitted.
NOTE: Failure to achieve test conditions as specified in the cited document,such as minimum control organism
survival,minimum control organism reproduction,and appropriate environmental controls,shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
9

Permit NC0004979
A. (10.) BIOCIDE CONDITION
The permittee shall not use any biocides except those approved in conjunction with the permit application. The
permittee shall notify the Director in writing not later than ninety(90)days prior to instituting use of any
additional biocide used in cooling systems which may be toxic to aquatic life other than those previously
reported to the Division of Water Quality. Such notification shall include completion of Biocide Worksheet
Form 101 and a map locating the discharge point and receiving stream. Completion of Biocide Worksheet Form
101 is not necessary for those outfalls containing toxicity testing. Division approval is not necessary for the
introduction of a new biocide into an outfall currently being tested for toxicity.
A. (11.) SPECIAL CONDITIONS
The following special conditions are applicable to all outfalls regulated by NC0004979:
• There shall be no discharge of polychlorinated biphenyl compounds.
• It has been determined from information submitted that the plans and procedures in place at Allen Steam
Station are equivalent to that of a BMP.
• The permittee shall report the presence of cenospheres observed in any samples.
• The applicant is permitted to discharge chemical metal cleaning wastes to the ash basin under the conditions
outlined in the 1976 Riverbend Ash Basin Equivalency Demonstration and the 1994 Allen Steam Station
permit application
• The permittee shall check the diked areas for leaks by a visual inspection and shall report any leakage
detected
• If the permittee,after monitoring for at least six months,determines that he/she is consistently meeting the
effluent limits contained herein,the permittee may request of the Director that the monitoring requirement
be reduced to a lesser frequency.
• Nothing contained in this permit shall be construed as a waiver by the permittee or any right to a hearing it
may have pursuant to State or Federal laws or regulations.
• Low volume waste is defined as follows(as per 40 CFR 423.11(b):
"Low volume wastes sources include,but are not limited to:wastewaters from wet scrubber air pollution
control systems,ion exchange water treatment system,water treatment evaporator blowdown,laboratory
and sampling streams,boiler blowdown,floor drains,cooling tower basin cleaning wastes,and recirculating
house service water systems. Sanitary and air conditioning wastes are not included."
A. (12.) SECTION 316 (B) OF CWA
The permittee shall comply with the Cooling Water Intake Structure Rule per 40 CFR 125.95.
10

•
NCDENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
Duke Energy Corporation—Allen Steam Station
NC0004979
Facility Information
(1.)Facility Name: ( Allen Steam Station
(2.)Permitted Flow(MGD): j No flow limit j (6.)County: Gaston
(3.)Facility Class: I I (7.)Regional Office: Mooresville —
(4.)Pretreatment Program: N/A (8.)USGS Topo Quad: G14NE
(5.)Permit Status: i Renewal (9.)USGS Quad Name: Belmont
Stream Characteristics
(1.)Receiving Stream: Catawba/ (7.)Drainage Area(mi2): ??/635
South Fork
Catawba Rivers
(2.)Sub-basin: _ 03-08-34 (8.)Summer 7Q10(cfs): 95/124
(3.)Stream Index Number: 11-123.5 C (9.)Winter 7Q10(cfs): 95/227
(4.) Stream Classification: I WS-V B (10.)30Q2(cfs): 3141/309
(5.)303(d) Status: ( Not listed (11.)Average Flow(cfs): ! 2,4702/806
(6.)305(b) Status: I - (12.)IWC%: 24(Outfall 002)
Notes:
1. 30Q2 for the Catawba River has been defined as the minimum daily average release at Mountain Island
Hydro.
2. Average flow(QA)for the Catawba River has been defined as mean annual flow based on operations
records from 1929 to 2003 at Mountain Island Hydro.
1.0 Request for permit modification
• Duke Energy Carolinas LLC has requested a permit modification seeking to eliminate the
selenium limit for Outfall 002(Ash Pond Effluent). A review of selenium data from October
2006 through December 2008 and its inclusion in a reasonable potential analysis will
determine whether the selenium limit can be removed.
• During the modification review, the Division received the Engineer's Certification(February
2009) confirming the construction and installation of the Flue Gas Desulfurization (FGD)
wastewater treatment plant at the Allen Steam Station. Upon completion of the FGD
WWTP,monitoring requirements at internal outfall 005 became effective.
2.0 Summary
Duke Energy's Allen Steam Station is a coal fired steam electric plant in Gaston County.
Effluent Guidelines are provided in 40 CFR 423.12. The facility is also subject to the Cooling
Water Intake Structure Rule(316(b)Rule)per 40 CFR 125.95. A special condition was added
during the 2006 permit renewal expressing this requirement(See Section A.12.of permit).

NPDES Permit Fact Sheet—04/22/09 Duke Power/ Allen Steam Station
Page 2 NC0004979
The facility has four permitted outfalls in the current NPDES discharge permit,issued in
September 2006.
> Outfall 001 is comprised of once through,non-contact condenser cooling water. The
average flow through this outfall was 626 MGD(per 2004 permit application). This
outfall discharges to the South Fork Catawba River.
➢ Outfall 002 is the ash basin discharge. The average discharge from this outfall is 19.3
MGD. This outfall discharges to the Catawba River.
> Outfalls 002A and 002B are intermittent discharges of emergency overflows(coal yard
'sump overflow and power house sump overflow,respectively). Both outfalls
discharge to the Catawba River. Federal regulations require a daily max TSS limit for
coal pile runoff(from a rain event)of 50 mg/L. The layout for this coal yard sump is
such that an overflow would most likely be low volume wastewater instead of coal pile
runoff. Chemical metal cleanings do not go to this sump. Therefore it was agreed that
the limits for this sump should be O&G 20 mg/L daily max and 15 mg/L monthly
average and TSS of 100 mg/L daily max and 30 mg/L monthly average.
> Outfall 003 is miscellaneous once through non-contact cooling water. This outfall
discharges to the South Fork Catawba River and averages 4.5 MGD(from 2004 permit
application).
> Outfall 004 is also miscellaneous once through non-contact cooling water. This outfall
discharges to the Catawba River and averages 6.5 MGD(from 2004 permit application).
➢ During the 2002 permit renewal,the facility received authorization to backwash an
intake filter for Unit 5 condenser cooling water on an as-needed basis. The wash
waters contain materials indigenous to the Catawba River such as Asiatic Clams and
light debris. This special condition(A.8.)remains in the permit allowing for this
discharge.
In 1995 the facility completed construction of a Chemical Injection Facility for the ash basin. The
purpose of this project was to assist with the settling of selenium and other pollutants that were
not being removed from the effluent. This project consisted of the construction of three primary
settling cells,a treatment channel,a chemical injection system(ferric sulfate to enhance selenium
precipitation)and a final settling/flocculation cell.
In February 2009,the Division received the engineer's certifications indicating the completion of
the construction of the modifications and improvements to the Allen Steam Station,Flue Gas
Desulfurization(FGD)WWTP and the installation of approximately 8200 linear feet of 14 inch
force main to the ash basin from the new FGD WWTP. Upon completion of the FGD WWTP,the
monitoring requirements associated with internal outfall 005 became applicable. This included
monthly monitoring for flow,and weekly monitoring for TSS,COD,arsenic,cadmium,
chromium,chloride,mercury,nickel,selenium,silver,zinc,and beryllium.

•
NPDES Permit Fact Sheet—04/22/09 Duke Power/Allen Steam Station
Page 3 NC0004979
3.0 Compliance Summary
DMR Data Review
Since the mod request was only for selenium,DMRs were reviewed for only effluent selenium
data from outfall 002 for the period of October 2006 through December 2008. The average flow
from 002 from 2006 through 2008 was 19.3 MGD.
The following table summarizes DMR data for non-toxicants at outfall 002.An RPA was
performed for selenium using the submitted data and an average wasteflow of 19.3 GMD..
4.0 RPA Analysis
An RPA was performed for total selenium only. Since the facility does not have a permitted flow
limit,past RPAs were conducted using the monthly average flow instead of permitted flow. The
same methodology was retained in this modification. Current average flow at outfall 002 is 19.3
MGD.
The current permit has a selenium limit of 21 µg/L. NC has a selenium aquatic life water quality
standard of 5.0 µg/L. According to Division policy,this criterion can be expressed as a weekly
average limit. Based on the 2006 RPA analysis,and selenium indicating reasonable potential to
exceed the water quality standard,the facility received a weekly average selenium limit of 21
µg/L during the last renewal. This modification requests that the selenium limit be reevaluated
since nearly two years of effluent data has been collected.
A RPA and review of submitted selenium now indicates that there is no reasonable potential to
exceed the water quality standard in the receiving stream. It is recommended that the weekly
average selenium limit be removed and that monthly selenium monitoring remain at Outfall
002.
Additional monitoring to Outfall 002
Since the installation of the FGD WWTP,a new wastestream of treated wet scrubber wastewater
will be discharged to the ash pond of Outfall 002. It is recommended that quarterly monitoring
for several parameters be added to Outfall 002 to determine the concentrations that may be
discharged with the FGD treatment. DWQ is aware that most of these parameters were
previously monitored at 002 in the years 2002 through 2005 and were dropped in 2006.
However,DWQ has consistently placed additional monitoring to any power plant ash ponds that
are now receiving FGD wastewater. The frequency of quarterly monitoring is the minimum
requirement for a major industrial discharger and will provide enough data in a five year permit
cycle to evaluate with the RPA.
There will now be quarterly monitoring at Outfall 002 for total arsenic,total cadmium,total
chromium,chloride,total mercury,total nickel, total silver,total zinc,and total beryllium.
4.0 Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: 5/6/09
Permit Scheduled to Issue: 6/29/09

NPDES Permit Fact Sheet— 04/22/09 Duke Power/ Allen Steam Station
Page 4 NC0004979
5.0 State Contact Information
If you have any questions on any of the above information or on the attached permit,please
contact Jacquelyn M.Nowell at(919)807-6386.
Copies of the following are attached to provide further information on the permit development:
• Draft permit
• RPA analysis
NPDES R mmendation
Signature ^ , / yA� Date 1/L V "6)/
Regional Office Comments:
Regional Recommendation by:
Signature Date
Reviewed and accepted by:
Regional Supervisor:
Signature Date
NPDES Unit Supervisor:
Signature Date

REASONABLE POTENTIAL ANALYSIS
Duke Energy-Allen Steam Station Outfall 2
NC0004979 Ow=19.3 MGD
Time Period 10/2006-12/2008
Ow(MOD) 19.3 WWTP Class I
7O10S(cfs) 95 IWC(%)C 7O10S 23.948
7O10W(cfs) 95 ®7O10W 23.948
3002(cfs) 314 0 3002 8.6984
Avg.Stream Flow,QA(cfs) 2470 C OA 1.1966
Rec'ving Stream Catawba River Stream Class WS-V B
STANDARDS&
PARAMETER TYPE CRITERIA(2) POL Units REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION
(1) NC WOB/ FAV/ n /dt Alex ProdCw Abwhn.Cw
Chronic Awn.
Acute: N/A
Arsenic C 10 ug/L 0 0 N/A
Chronic: 836
Acute: N/A
Beryllium C 6.5 ug/L 0 0 N/A
•
Chronic: 549
Acute: 15
Cadmium NC 2 15 ug/L 0 0 N/A
Chronic: --8
Acute: 1,022 -
Chromium NC 50 1,022 ug/L 0 0 N/A
Chronic: 209
Acute: 7
Copper NC 7 AL 7.3 ug/L 0 0 N/A
Chronic: 29
Acute: 22
Cyanide NC 5 N 22 10 ug/L 0 0 N/A
Chronic:_— 21
Acute: N/A
Fluoride NC 1,800 ug/L 0 0 N/A
Chronic: 7,516
Acute: 34
Lead NC 25 N 33.8 ug/L 0 0 N/A
Chronic:
Acute: N/A
Mercury NC 12 2.0000 ng/L 0 0 N/A
Chronic: 50
Acute: N/A
Sulfates NC 250,000 ugh. 0 0 N/A
Chronic: 1,043,916
Acute: 261
Nickel NC 25 261 ug/L 0 0 N/A
Chronic:
Acute: N/A
Phenols A 300 N ug/L 0 0 N/A
Chronic: 3,449
Acute: 56 Max prod.value is<chronic and acute allowable conc.
Selenium NC 5.0 56 ugh!. 54 54 17.5 _ _No reasonable potential to_exceed the allow s able_. _ •
Chronic:---21 RecommendatI n:Limit for Se can be removed.Quarterly
monitoring for Se should remain for outfalis 002&004.
Acute: 1
Silver NC 0.06 AL 1.23 ug/L 0 0 N/A
Chronic:- 0
Acute: 67
Zinc NC 50 AL 67 ug/L 0 0 N/A _
Chronic: 209
•Legend: •'Freshwater Discharge
C=Carcinogenic
NC=Non-ceminogenic
A=Aesthetic
4979rpe2009semod.xls,rpe
4/2/2009

REASONABLE POTENTIAL ANALYSIS
Selenium
Date Data BDL=1/2DL Results
1 Oct-2006 2.7 2.7 Std Dev. 1.9207
2 3.6 3.6 Mean 4.6111
3 5. 5.0 C.V. 0.4165
4 5. 5.0 n 54
5 5.7 5.7
6 9.3 9.3 Mutt Factor= 1.4500
7 2.5 2.5 Max.Value 12.1 ug/L
8 3.3 3.3 Max.Pred Cw 17.5 ug/L
9 3.2 3.2
10 3.6 3.6
11 4.4 4.4
12 2.5 2.5
13 4.9 4.9
14 5.4 5.4
15 4.3 4.3
16 6. 6.0
17 9. 9.0
18 Jun-2007 12.1 12.1
19 4.5 4.5
20 5.2 5.2
21 3.5 3.5
22 3.9 3.9
23 4.8 4.8
24 6.1 6.1
25 4.8 4.8
26 4.1 4.1
27 5.7 5.7
28 3.3 3.3
29 5.7 5.7
30 7.3 7.3
31 2.7 2.7
32 3.1 3.1
33 3.2 3.2
34 3.5 3.5
35 4.5 4.5
36 5.2 5.2
37 5.3 5.3
38 4.2 4.2
39 3. 3.0
40 3.7 3.7
41 3.8 3.8
42 6.1 6.1
43 9.1 9.1
44 4.4 4.4
45 5.9 5.9
46 2.9 2.9
47 4.8 4.8
48 4.1 4.1
49 2.4 2.4
50 2.9 2.9
51 2.8 2.8
52 4.5 4.5
53 2.6 2.6
54 2.9 2.9
55
56
57
58
59
60
199
200
4979rpa2009semod.xis,data
-2- 4/2/2009

. , , ,\O�O ' / 1- 61 Beverly Eaves Perdue,Governor
Dee Freeman.,Secretary
rNorth Carolina Department of Environment and Natural Resources
Q •
r. Coleen H.Sullins,Director
Division of Water Quality
r
January 28, 2009 RicerolIFD
STEPHEN IMMEL
GENERAL MANAGER II '
DUKE ENERGY ALLEN STEAM STATION JY`. r ^^11
253 PLANT ALLEN RD
BELMONT NC 28012 .
IINOw £d i kt•. 1ii;
Surface Water Pruitt;
Subject: Acknowledgement of Permit Modification Request
Allen Steam Station
NPDES Permit NC0004979
Gaston County
Dear Mr. Immel:
•
The Division of Water Quality, Point Source Branch, acknowledges receipt of your permit modification request with
supporting information on January 23, 2009 and receipt of payment check#0001138843, from Duke Energy Corp, in
the amount of$1030.00,dated January 15, 2009.
The reviewer will perform a detailed review and contact you with a request for additional information if necessary. To
ensure the maximum efficiency in processing permit applications, the Division requests your assistance in providing a
timely and complete response to any additional information requests.
Please note at this time, processing permit applications can take as long as 60-90 days after receipt of a completed
application.
If you have any questions,please contact Jackie Nowell at 919-807-6386 or via email at jackie.nowellL ncmail.net . If
the reviewer is unavailable,you may leave a message, and they will respond promptly.
PLEASE REFER TO THE ABOVE APPLICATION NUMBER WHEN MAKING INQUIRES ON THIS
PROJECT.
Sincerely,
- ,..) /7
aurie Singleton
Point Source Branch
• ,Cc: Central File
¢Mooresville Regional Office Surface Water Pr.`a otion Section
Permit application file NC0004979
Narc hCarolIna
Naturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh,NC 27699-1617 Phone[phone] Customer Service
Internet: www.ncwaterquality.org Location: 5h2 N.Salisbury St. Raleigh,NC 27604 Fax [phone] I-897-623-6748
•
• An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper •

Duke DUKE ENERGY CAROLINAS
ALLEN STEAM STATION/253 Plant Allen Rd.
*Energy® Belmont, NC 28012
Carolinas
704 829 2350
704 829 2370 fax
RECEIVED
August 29, 2008 SEP - 2 2008
Mr. John Lesley NC DENR MRO
Mooresville Regional Office
North Carolina Department of Environment and Natural Resourc : UrfaCe,Wafer Profecforu
�10 Fast Center QvenuP Suite 301
Mooresville, NC 28115
Subject: Duke Power Company
Plant Allen
NPDES Permit Number NC0004979
i1JL11�r'vrt %H Zvo 0 pl7 77
Dear Mr. Lesley:
This letter fulfills the 5 day written notification requirement as stipulated by the NPDES permit Part
II, Section E. 6. a. On the morning of August 27, 2008 heavy rains associated with remnants of
Tropical Storm Fay in combination with Coal Yard sump pump unavailability subsequently
overwhelmed the Yard Drainage sump pumps resulting in a bypass of treatment of approximately
1500 gallons of coal pile runoff water. Mr. John Lesley was notified of this release on Wednesday,
August 27th at 8:15 am. No adverse impact to the environment was observed.
If additional information is requested please contact Don Scruggs at(704) 829-2423.
Sincerely,
Stephen . Immel
Station Manager
www duke energy corn

bc: Allen Stowe-EC13K
Pat McCabe= EC13K
Steve Immel-Plant Allen
Don Scruggs-Plant Allen
Record Number: 404.060.01 (Plant Allen)
CERTIFIED MAIL: 7099 3400 0012 0549 1754

Duke Energy
Allen Steam Station
.a.y ..
, i_ r _•
-111r
• ,, n.‘1,401 *0i°".:a..:.
Alstom Power
P.O. 2 , ! i
Contractor — The Consortium of
USFilter Waste Water Group aoltHo�,
and
Crowder Construction Company 'SEAL
p 030335
Owner — Duke Energy .544,one
General System Description ►.,,
8-z-4—cc
IS DCN: 57001328-1000-(D-SPEC01)-02 USFCI
General System Description
Duke No: AM 6208.06-0007.001 May 10, 2006
ERN: FHSOOFYD Rev B
FILENAME: 24008001-(57001328-1000-(D-SPEC01)-02)-VIRBB

i"
I,
_ GENERAL SYSTEM PAGE 1 OF 5
DESCRIPTION
A Siemens Business
Allen Steam Station B Revised Per Alstom Comments 5/10/06
PROJECT CODE DOC TYPE DOC* A Permit Application Issue 4/28/06
157001328 1000 (D-SPEC01) 02 FGD WWTS REV DESCRIPTION DATE
Table of Contents
1.1 EQUALIZATION SYSTEM 2
1.2 REACTION SYSTEM 2
1.3 CLARIFICATION SYSTEM 3
1.4 SLUDGE DEWATERING SYSTEM 3
1.5 FILTRATION SYSTEM 3
1.6 SELENIUM REDUCTION SYSTEM 3
1.7 CHEMICAL SUPPLY SYSTEM 4
1.8 EFFLUENT SYSTEM 5
FILENAME:24008001-(57001328-1000-(D-SPEC01)-02)-VIRBB.doc

Y ..
_ -- __ _ GENERAL SYSTEM PAGE 2 OF 5
� = DESCRIPTION
A Siemens Business -
Allen Steam Station B Revised Per Alstom Comments 5/10/06
PROJECT CODE DOC TYPE Doc A Permit Application Issue 4/28/06
157001328 1000 (D-SPEC01) 02 FGD WWTS REV DESCRIPTION DATE
OVERVIEW
In the course of reviewing the system description for the Flue Gas Desulphurization
Wastewater Treatment System(FGD WWTS), it is highly recommended that the
reviewer refer to the process flow diagrams of the system. The process flow diagrams
have been prepared by USFilter to provide an overview of the treatment system
indicating the various waste streams and process steps to effect treatment.
The FGD WWTS has been designed to treat the purge stream from the flue gas scrubber
system in order to be able to discharge the final effluent to the ash basin. The treatment
system consists of a series of physical-chemical-biological unit processes designed to
precipitate heavy metals, remove and dewater solids, and reduce the selenium
concentration for final discharge.
1.1 Equalization System
• The FGD purge stream is conveyed to the FGD WWTS and discharges into the
equalization tank.
• The equalization tank also receives flows from the filtrate sump,backwash holding
compartments and out of spec effluent from the second stage recycle tank. The
contents of the equalization tank are blended by a bridge mounted agitator.
• At a fairly constant rate, the blended wastewater is transferred by the operating
wastewater forwarding pump to three (3) reaction tanks in series.
1.2 Reaction System
• Hydrated lime slurry is added to reaction tank 1 to control the pH in order to effect
the precipitation of soluble metals. In order to achieve the desupersaturation
operation in a controlled fashion via a crystal growth mechanism, sludge is also
recycled to reaction tank 1 from the downstream clarifiers.
• A sulfide reagent is metered to reaction tank 2 to form heavy metal sulfide complexes
which have very low solubility products thus resulting in maximum heavy metal
removal.
• Ferric chloride is metered into reaction tank 3 to form a dense floc and enhance the
settling characteristics of the precipitate. Additionally, the hydrolyzed form of this
coagulant provides precipitation sites for coprecipitation of other metals.
• Overflow from reaction tank 3 is directed to the flow splitter box ahead of the
clarifiers, where polymer is injected to aid in the settling process.
FILENAME:24008001-(57001328-1000-(D-SPEC01)-02)-VIRBB.doc

•
GENERAL SYSTEM PAGE 3 of 5
DESCRIPTION
A Siemens Business
Allen Steam Station B Revised Per Alstom Comments 5/10/06
PROJECT CODE DOC TYPE DOC a A Permit Application Issue 4/28/06
157001328 1000 (D-SPEC01) 02 FGD WWTS REV DESCRIPTION DATE
1.3 Clarification System
• Two (2)parallel solids contact clarifiers are utilized as the liquid/solids separation
devices.
• Clarified wastewater exits through radial effluent troughs and flows by gravity to the
continuous backwash filters for fine suspended solids removal.
• Settled solids are removed from the clarifiers by the operating sludge transfer pump
and conveyed to the mixed sludge holding tank.
• Sludge is recycled by the operating sludge recycle pump to reaction tank 1 to provide
seed crystals for gypsum nucleation.
1.4 Sludge Dewatering System
• Solids contained in the sludge holding tank are dewatered by the three (3) filter
presses on a batch basis.
• Dewatered cake from the filter presses is ultimately disposed of by landfilling.
• Filtrate from the dewatering process is transferred to the filtrate sump and
subsequently transferred to the equalization tank for reprocessing.
• A maintenance tank is provided to allow the equalization tank and sludge holding
tank to be taken out of service for maintenance, so that the treatment system remains
in operation.
1.5 Filtration System
• The pH of the effluent from the clarifiers is reduced using hydrochloric acid prior to
filtration.
• Neutralized wastewater flows to three(3)parallel continuous backwash filters for
removal of finely suspended solids and metal sulfide complexes.
• Effluent from the filters is conveyed to the selenium reduction system for further
processing.
• Backwash solids and water flow continuously by gravity to the filtrate sump for
retreatment.
1.6 Selenium Reduction System
• The wastewater is cooled to approximately 95°F by circulating FGD make-up water
through two (2) plate and frame heat exchangers. The wastewater is pumped through
the heat exchangers using the operating selenium reduction system feed pump.
FILENAME:24008001-(57001328-1000-(D-SPEC01)-02)-VIRBB.doc

. i
asr _a=_ GENERAL SYSTEM PAGE 4 OF 5
DESCRIPTION
A Siemens Business
Allen Steam Station B Revised Per Alstom Comments 5/10/06
PROJECT CODE DOC TYPE Doc a A Permit Application Issue 4/28/06
f 57001328 1000 (D-SPEC01) 02 FGD WWTS REV DESCRIPTION DATE
• Wastewater from the heat exchangers discharges into the top of six (6) first stage bio-
reactor cells and travels downward to the collection header where it is collected in the
effluent collection/backwash distribution headers and is conveyed by gravity to the
two (2) first stage effluent transfer compartments.
• Wastewater is then pumped by the first stage effluent transfer/recycle pump into the
top of six (6) second stage bio-reactor cells. From there the wastewater flows
downward through the bio-reactor to the effluent collection/backwash distribution
headers and is conveyed by gravity to the second stage recycle tank.
• Nutrient is added to the feed to the influent of the first and second stage bio-reactors
on a continuous flow proportional basis to promote cell growth.
• Periodically first stage bio-reactor effluent is pumped by the bio-reactor backwash
pump through a bio-reactor cell at a high flow rate in order to release trapped nitrogen
bubbles and flush out suspended solids and excess bacteria that contains selenium and
other heavy metals from the bio-reactor cell. The backwash from a bio-reactor
backwash is sent to two (2)backwash holding compartments, were it is returned to
the equalization tank at a controlled rate for reprocessing.
1.7 Chemical Supply System
• One (1) lime silo system is provided to receive bulk dry lime delivery, store dry lime,
makeup a lime slurry mixture and to recirculate/add this slurry to reaction tank 1 for
pH adjustment/gypsum desaturation. An open and closed automatic pinch valve
installed in the recirculation line is used to control the lime slurry addition.
• A sulfide feed pump skid including two (2) speed-controlled metering pumps, valves,
instruments and piping is included to add sulfide to reaction tank 2 to precipitate
dissolved metals in the wastewater as metal sulfides. Sulfide(TMT) is supplied to
the pump skid from chemical totes.
• The ferric chloride supply system includes a chemical storage tank and two (2) speed-
controlled metering pumps, valves, instruments and piping. Ferric chloride is
delivered to the storage tank and is metered to reaction tank 3 to enhance solids
settling characteristics of the suspended precipitates.
• Two polymer feed pump skids including speed-controlled metering pumps, dilution
water supply and control,polymer mixing and activation, valves, instruments and
piping is included to add dilute polymer to the flow splitter box agglomerate
suspended solids to improve solids settling in the clarifiers. Polymer is supplied in its
neat form to the pump skid from chemical totes.
FILENAME:24008001-(57001328-1000-(D-SPEC01)-02)-VIRBB.doc

I,S_ �mi. = GENERAL SYSTEM PAGE 5 OF 5
DESCRIPTION
A Siemens Business
Allen Steam Station B Revised Per Alstom Comments 5/10/06
PROJECT CODE DOC TYPE Doc A Permit Application Issue 4/28/06
157001328 1000 (D-SPEC01) 02 FGD WWTS REV DESCRIPTION DATE
• The hydrochloric acid supply system includes a chemical storage tank and two (2)
speed-controlled metering pumps, valves, instruments and piping. Hydrochloric acid
is delivered to the storage tank and is metered to the clarifier effluent to neutralize the
wastewater in preparation for biological treatment.
• The nutrient supply system includes a chemical storage tank and three(3) speed-
controlled metering pumps, valves, instruments and piping. Nutrient is delivered to
the storage tank and is metered to the influent to the first and second stage bio-
reactors.
• Two (2)rotary screw air compressors, a two-bed desiccant air dryer and associated
valves and controls are provided to supply plant and instrument quality air to the
various treatment system users.
1.8 Effluent System
• Effluent from the second stage recycle tank, along recycled heat exchanger cooling
water is conveyed to the effluent tanks.
• If required,makeup water can also be added to the effluent tanks.
• At a fairly constant rate, the final effluent is transferred to the ash basin by the
operating effluent pump.
FILE NAME:24008001-(57001328-1000-(D-SPEC01)-02)-VI RBB.doc

_____________T` Michael F.Easley,Governor
State of North Carolina
pG William G.Ross,Jr.,Secretary
ariof n Nat rape ces
Dsi f tla terua
May 22,2008
Ronald E.Lewis NC DENR I��►�0
Duke Energy Company /�
Water Management.
EC13K P.O.Box 1006 AlDQ-Surface Water Protection
Charlotte,North Carolina 28201-1006
Subject Authorization to Operate
Temporary Cooling Water Intake Structure
NPDES Permit NC0004979
Duke Power/Allen Steam Station
Gaston County
Dear Mr.Lewis:
This letter authorizes the operation of a temporary supplemental cooling water pumping system at the existing
Allen Steam Station electric plant. The system will consist of nine floating intake pipes with screened openings
(3/8 inch square mesh) and pumps designed to withdraw at a through screen velocity at or below 0.5 feet per
second(fps). The intake pipes will pump water from the Catawba River to the station's condenser cooling water
(CCW) discharge canal, which flows to the South Fork Catawba River. The temporary supplemental cooling
water pumping system will initially pump at the rate of 60, 000 gallons per minute (gpm) and will be an 11%
increase of the current pumping capacity. (This temporary intake system will be replaced by a permanent
pumping system of submerged wedge wire screened piping and pumps designed to withdraw a total of 240,000
gpm into four manifolds and four pipes that will discharge into the CCW canal in July 2009.)
This temporary pumping plan has been proposed to ensure uninterrupted power production at this base load
facility,while mitigating effects on the aquatic community and downstream users. The current proposal has been
reviewed by staff of the NC Division of Water Quality(DWQ).
The temporary pumping plan is authorized to be implemented with the following operational and design measures
to minimize water quality and biological impacts:
> The temporary supplemental cooling water pumping system will operate continuously from July 2008
through September 2008 in conjunction with the operation of the Allen Steam Station's electrical
generating units.
> The Catawba River intake pumps will be positioned above the river bottom and have an approach
velocity less than or equal to 0.5 feet per second across screening with 3/8 inch mesh openings to
minimize fish entrainment and impingement.
> The temporary supplemental cooling water pumping system will initially pump at the rate of 60, 000
gallons per minute(gpm)and will be an 11%increase of the current pumping capacity.
> The withdrawal location will be downstream of the existing intake structure and pump the water from the
Catawba River to the condenser cooling water discharge canal, which flows to the South Fork Catawba
River.
> The facility will perform routine monthly lake monitoring during the period of pumping to assess
limnological conditions in the Catawba River. During July,August and September,thermal and DO
profiles will be taken in the vertical water column at designated downstream sampling locations.
1617 MAIL SERVICE CENTER,RALEIGH,NORTH CAROUNA 27699-1617-TELEPHONE [phone]/FAX [phone]
VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES

PNC0004979
Page 2 of 2
May 22, 2008
Please note that this authorization does not affect the legal requirements to obtain other permits which may be
required by the Division of Water Quality,the Division of Land Resources,the Coastal Area Management Act,or
any other federal or local governmental permits. .
If you have any questions or need additional information,please do not hesitate to contact Jacquelyn M.Nowell of
my staff at(919)733-5083,extension 512.
Sincerely, i
J
tr‘-1;usan
A.Wilson
upervisor,Western NPDES Program
cc: Central Files
NPDFS File/NC0004979
tool ebville Regional 0�"6.,6,e-- b.��6, , , ,,1,
ryn Tracy/Environmental Sciences Section

Michael F.Easley,Govemo l
9P William G.Ross Jr.,Secre
North Carolina Department of Environment and Natural Resourc
Coleen Sullins.Director
O
7 Division of Water Quality
March 4, 2008
Mr. Don Scruggs
Duke Power Company-Allen Steam Station
253 Plant Allen Road
Belmont,NC 28012
Subject: Compliance Evaluation Inspection
Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Gaston County,NC
Dear Mr. Scruggs:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection
conducted at the subject facility on February 28, 2008 by John Lesley of this Office.
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
Surface Water Protection
Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
JL
N°thCra!!yams� i13 7A
J7atu
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

United States Environmental Protection Agency Form Approved.
E PA Washington,D.C.20460
OMB No.2040-0057
Water Compliance Inspection Report Approval expires 8-31-98
Section A National Data System Coding(i.e.,PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 'N' 2 3 11 12 17 18 19 20
U U I NC0004979 1 08/02/28 �C� U � �
Remarks ��----�� u r--'
211IIIIIIIIIIIIIIIIIIIIIII11111111IIIIIIIIIIIIil166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA Reserved
67I 169 70, _, 71,__, 72,ill 73 L 74 75I 1 I 1 IIII 80
Section B: Facility Data u
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number) 01:30 PM 08/02/28 06/10/01
Plant Allen Steam Station
NCSR 2525 Exit Time/Date Permit Expiration Date
Belmont NC 28012 03:00 PM 08/02/28 10/05/31
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Donald Lynn Scruggs/ORC/704-829-2423/
Name,Address of Responsible Official/Title/Phone and Fax Number
Jimmie Allen Stowe,526 S Church St Charlotte NC Contacted
282011002//704-382-4309/7043829840 No
Section C: Areas Evaluated During Inspection(Check only those areas evaluated)
■Permit ■Flow Measurement .Operations&Maintenance ■Records/Reports
.Self-Monitoring Program ■Facility Site Review ■Effluent/Receiving Waters ■Laboratory
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Signature(s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date
John E Lesley ,.' MRO WQ//704-663-1699 Ext.2198/ / z ere;
7
(-7.--7-Tr\-\ZIA—, c._ t____• -- z5
Sign re of Management Q AZevie _ Agency/Office/Phone and Fax Numbers Date
Marcia cco MRO WQ//704-663-1699 Ext.2204/ attI
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

NPDES yr/mo/day Inspection Type 1
Pilir
11 12 17 18
I NC0004979 I I 08/02/28 I U
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
No violations were reported in January- December 2007.
Page# 2

Permit NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 02/28/2008 Inspection Type: Compliance Evaluation
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? ❑ ❑ ■ ❑
Is the facility as described in the permit? • ❑ ❑ ❑
#Are there any special conditions for the permit? 0 0 • 0
Is access to the plant site restricted to the general public? ■ ❑ ❑ ❑
Is the inspector granted access to all areas for inspection? ■ ❑ ❑ ❑
Comment:
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? 11000
Is all required information readily available,complete and current? ■ ❑ ❑ ❑
Are all records maintained for 3 years(lab. reg. required 5 years)? 11000
Are analytical results consistent with data reported on DMRs? ■ 0 0 0
Is the chain-of-custody complete? 110130
Dates,times and location of sampling ■
Name of individual performing the sampling ■
Results of analysis and calibration ■
Dates of analysis ■
Name of person performing analyses ■
Transported COCs U
Are DMRs complete: do they include all permit parameters? MOOD
Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ ■ ❑
(If the facility is=or>5 MGD permitted flow) Do they operate 24/7 with a certified operator on each shift? ❑ ❑ ■ ❑
Is the ORC visitation log available and current? ■ ❑ ❑ ❑
Is the ORC certified at grade equal to or higher than the facility classification? 111000
Is the backup operator certified at one grade less or greater than the facility classification? ■ ❑ ❑ ❑
Is a copy of the current NPDES permit available on site? ■ ❑ ❑ ❑
Facility has copy of previous year's Annual Report on file for review? ❑ ❑ ■ ❑
Comment:
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? ■ ❑ ❑ ❑
Page# 3

PIP
Permit NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 02/28/2008 Inspection Type: Compliance Evaluation
Effluent Pipe Yes No NA NE
Are the receiving water free of foam other than trace amounts and other debris? ■ ❑ ❑ ❑
If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ ■ ❑
Comment: All outfall are as described in the permit. Effluent discharges were all clear
with no suspended solids or foam.
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? 0 0 ■ 0
Is flow meter calibrated annually? 0 0 • 0
Is the flow meter operational? 0 0 ■ 0
(If units are separated) Does the chart recorder match the flow meter? ❑ ❑ ■ ❑
Comment: Flow is measured by pump logs at outfall 001 and by a staff guage and weir
at outfall 002. Flows are estimated at outfalls 003 and 004.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? ■ ❑ ❑ ❑
Are all other parameters(excluding field parameters) performed by a certified lab? ■ ❑ ❑ ❑
#Is the facility using a contract lab? ■ ❑ ❑ ❑
Is proper temperature set for sample storage(kept at 1.0 to 4.4 degrees Celsius)? 11000
Incubator(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? ❑ ❑ ■ ❑
Incubator(BOD)set to 20.0 degrees Celsius+/-1.0 degrees? 0 0 ■ 0
Comment: Samples are immediately placed in ice. The on-site lab is certified for pH
(Certificate No. 5134). Duke Environmental Lab conducts testing and analyses,
Environmental Testing Solutions performs toxicity testing.
Operations &Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ ❑ ❑ ❑
Does the facility analyze process control parameters,for ex: MLSS, MCRT, Settleable Solids,pH, DO, Sludge 00110
Judge,and other that are applicable?
Comment: The system is a physical chemical facility. Online pH measurement is used
for pH adjustment.
Upstream I Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit(frequency, sampling type,and sampling location)? ■ 0 0 0
Comment:
Page# 4

. ` Duke CORPORATE EHS SERVICES
l ®aEnergy® Duke Energy Corporation
526 South Church St.
February 25, 2008 Charlotte, NC 28202
Mailing Address:
EC13K l PO Box 1006
Charlotte, NC 28201-1006
Mr. Sergei Chernikov 1P4%
North Carolina Department of Environment
and Natural Resources
Division of Water Quality Co
NPDES Unit to //4%/1
1617 Mail Service Center O 2 6
Raleigh,North Carolina 27699-1617 /�O �/4 46,
Subject: Duke Energy Carolinas, LLC /�PS0 '
J
4
Allen Steam Station#NC0004979—Gaston County--ir ,, ta0A
Drought Related Mitigation Request e/0A 1/7
Wtcy
Dear Mr. Chernikov:
As a follow-up to our meeting to discuss potential drought mitigation options on January
29, 2008, three copies of the following request are being submitted for review and
approval to install a supplemental cooling water pumping system at Allen Steam Station.
Application of the modified Lake Wylie reservoir hydrodynamic and water quality CE-
QUAL-W2 model using low flow conditions experienced in the summers of 2002 and
2007 has shown that anticipated water quality impacts from operation of a supplemental
cooling water pumping system from July through September of each year will be
negligible(see enclosed report dated December 5, 2007 and Environmental Assessment).
Due to the predicted on-going drought conditions, Duke Energy requests approval to
install supplemental summer season cooling capacity at Allen Steam Station. Initially, in
2008 a 60,000 gpm temporary supplemental cooling water pumping system (see enclosed
proposed operation and site plans) would be added, followed by a 240,000 gpm
permanent supplemental cooling system intended for operation in 2009. The
supplemented oling water flow of these systems represents an increase of 11%
(summer 2008) nd 44% (summer 2009 and thereafter) of the present cooling water
pumping capacity at Allen.
The temporary system will be similar to that recently approved for pumping water from
the Dan River to Belews Lake from January through March in 2008 to offset the
evaporative loss due to drought conditions in 2007 (see enclosed photos), and will
similarly have a floating, screened intake design. The proposed 240,000 gpm permanent
supplemental pumping system planned for operation starting in July 2009 will feature
submerged wedge wire screened intake pipes. A detailed design and excavation plan, as
well as a sedimentation and erosion control plan will follow for your review and approval
prior to implementation. NE D
RECEIVED
MAY 1 57-CB
www.duke-ener y.com
NC DENR 1R0
DWQ-Surface Wafer Protection

During the three month operation of the supplemental cooling water pumping system,
Allen's condenser cooling water (CCW) discharge temperature for Outfall 001 will be
modified to include the temperature of the supplemental cooling water pumping system
based on the system flow and Allen's CCW intake temperatures. Duke Energy requests
that Allen's NPDES permit be modified to incorporate this change with initial approval
of the temporary supplemental pumping system. Enclosed is a check in the amount of
$1030.00 for the permit modification fee.
Your assistance to expedite review of this drought-related mitigation project is greatly
appreciated. As we previously discussed, setting up a meeting to further discuss plans
with you and other agency contacts that need to review and approve the proposed
activities will be beneficial. After your initial review of the request, please advise me of
available dates for us to coordinate a meeting to identify and expedite addressing any
issues of concern. Should you have questions regarding this request, please call (704-
607-8755 or email me relewisl(a duke-energy.com.
Sincerely,
'Q671- cr-UAA-4*--"a
Ron Lewis
Water Management
Attachments
cc WI: Bryn Tracy — NCDENR Environmental Sciences Section
1621 Mail Service Center, Raleigh,NC 27699-1621

ENVIRONMENTAL ASSESSMENT OF PROPOSED SUPPLEMENTAL
COOLING WATER PUMPING SYSTEM AT ALLEN STEAM STATION
Summary of Model Results—Assessment of Potential Water Quality Impacts
Due to the predicted on-going drought conditions, Duke Energy requested that Reservoir
Environmental Management, Inc. (REMI) assess the reservoir water quality effects of
using supplemental cooling water at Allen Steam Station Application of the modified
Lake Wylie reservoir hydrodynamic and water quality CE-QUAL-W2 model by REMI
(see report dated Dec 5, 2007) using low flow conditions experienced in summers of
2002 and 2007 has shown that anticipated water quality impacts from operation of a
supplemental cooling water pumping system from July through September of each year
will be negligible. The model shows that lake effects would be generally limited to
changes in temperature in the South Fork Catawba River, and there will be minimal
temperature and dissolved oxygen changes in the main arm of Lake Wylie, including the
Catawba Nuclear Station (CNS) intake and the Wylie hydro fore bay. Under a "worst
case" modeled scenario including 24-hour Allen full generation capacity and applying
current thermal discharge NPDES limits, only modest thermal increases were predicted
for Lake Wylie. Worst case temperature increases were on the order of 1 to 2 degrees F,
limited primarily to the South Fork Catawba River downstream of Allen, although for a
short period (about 10 days) in either modeled low-flow year, results indicated a similar
temperature increase of about 1 to 2 degrees F in the vicinity of the Allen condenser
cooling water (CCW) intake. At all other sites further downstream in the reservoir,
thermal effects could not be discerned. Lake-wide, dissolved oxygen vertical profiles
were virtually unchanged when these two low-flow summers were modeled, either with
or without operation of the supplemental pumping system.
In order to assess the initial summers (2008 and 2009) of bypass operation, in light of the
modeled predictions, we propose to implement the following supplemental Lake Wylie
monitoring program (see Figure 1 for sampling locations):
o Vertical water column thermal and dissolved oxygen (DO) profiles during July,
August and September at:
• Lake Wylie fore bay(Loc 200)
• Allison Creek arm of Lake Wylie at the Catawba Nuclear Station discharge
cove (Loc 215)
• Lake Wylie at Buster Boyd Bridge (Loc 225)
• Downstream of the Allen CCW discharge near the confluence of the South
Fork and main stem Catawba River(Loc 235)
• Allen CCW discharge confluence with Lake Wylie (Loc 242)
• Upstream on the South Fork Catawba River (above the influence of Allen
(Loc 249) (surface sample)
• Allen CCW intake (Loc 250)

For initial operational summers of the temporary (2008) and permanent supplemental
systems (2009), summer thermal and DO profiles data collected at these Lake Wylie sites
will be compared to the REMI-modeled results.
Summary of Model Results—Assessment of Potential Fisheries Impacts
On-going fish monitoring studies continue to indicate that a diverse fish community is
present in the littoral portions of Lake Wylie around Plant Allen. The high number of
fish species collected during spring indicates the combined effects of fish attraction to the
Allen Steam Station discharge and the tendency for a greater variety of species to inhabit
the shoreline in spring compared to summer. Despite the repulsion of fish from the
thermal effluent of Allen during summer, "...there is a balanced and indigenous fish
community in Lake Wylie" (Duke Power Company 1994', Duke Power 20012 and
20043). Proposed operation of the supplemental cooling water pumping system from
July through September will avoid the fish spawning period of March through June and
minimize spikes of the discharge water temperature when peak electrical generation
demand is prevalent. Based on the minimal projected changes in temperature and
dissolved oxygen associated with the supplemental cooling water flows during July,
August, and September at Allen, the current fisheries monitoring program is adequate to
document any changes in the fish population of Lake Wylie resulting from operation of
the proposed supplement pumping system.
Duke Power Company 1994. Assessment of balanced and indigenous populations in
Lake Wylie near Plant Allen. Duke Power Company, Charlotte,NC.
2 Duke Power Company 2001. Assessment of balanced and indigenous populations in
Lake Wylie near Plant Allen. Duke Power, Charlotte,NC.
3 Duke Power Company 2004 Assessment of balanced and indigenous populations in
Lake Wylie near Plant Allen. Duke Power, Charlotte,NC.

I
270.0
Lake Wylie
Sample Locations
261.0
265.0
260.
*( 249.0 /
255.0
Plant Allen
242.0 0 250.0
f
kio.
230.I 245.0
235.0
222.0 N
W i � E
225.0 s
219.0
219.2 22220.8 # Monitoring locations
Catawba 19•4 `o�i`';\ 220.6
Nuclear
Station 215.0 10' 200.0
Wylie Hydro
k 180.0
205.0201.0
179.0
0 1 2 3 4 5 Miles
Figure 1. The Lake Wylie study area.

OPERATION AND SITE PLAN OF PROPOSED SUPPLEMENTAL COOLING
WATER PUMPING SYSTEM AT ALLEN STEAM STATION
The supplemental cooling water pumping system will be operated continuously from July
through September of each year in conjunction with the operation of the Allen's electrical
generating units. Initially in 2008, installation and operation of a temporary pumping
system is planned in 2008. The temporary pumping system will consist of nine floating
intake pipes with screened openings (3/8 inch square mesh) and pumps designed to
withdraw at a through screen velocity at or below 0.5 fps a total of 60,000 gpm into a
manifold connected to one pipe that will discharge into the condenser cooling water
(CCW) canal of Allen Steam Station (Figure 2). The floating intake design of the
temporary system will be similar to that approved for pumping water from the Dan River
to Belews Lake from January through March in 2008 to off set the evaporative loss
associated with drought conditions in 2007 (Figures 3-5). Only minimal disturbance of
land will be required for installation of the temporary intake piping (less than one acre
and hand cutting of trees along 120 feet of shoreline just South of Allen's existing service
water intake, see Figures 2 and 6). In this same area, the temporary intake system will be
replaced by a permanent pumping system consisting of submerged wedge wire screened
piping and pumps designed to withdraw at a through screen velocity at or below 0.5 fps a
total of 240,000 gpm into four manifolds and four pipes that will discharge into the
condenser cooling water (CCW) canal of Allen Steam Station starting in July 2009
(Figure 7). A detailed design and excavation plan, as well as a sedimentation and erosion
control plan, will follow for approval of the installation of the permanent supplemental
pumping system.
Currently Allen's CCW discharge temperature is monitored continuously and flow-
weighted daily and monthly average temperatures are reported per the monthly discharge
monitoring report for Outfall 001. During operation of the supplemental cooling water
pumping system, Allen's CCW discharge temperature for Outfall 001 will be modified to
include the temperature of the supplemental cooling water pumping system based on the
system flow and Allen's CCW intake temperatures.

1 • 1 n 1 1 • 1 1 • 1 A' 1 - 1
IhS7-_/Zi},'1,, .'",i k j--'7'----,--;‹,) - ' -.--,..e., KL : A.:: 1 .
_ '--------'---'1 ill 10‘V j ° . t 4.- a .4'''? / /7'.... 4 t'2. 11 "I''',.
',',.. ,',;;;,,,',., 14 It f---- ---- - - A),i ,. ,,t'),,,)t.4.c,iw\ -'\'‘ ,,,r,i,, //::____..,,\,_,/ z(,:41
_. ,,,,,,A. it/ iiiiiirt'-.,\,: II . il-'""-
1 Ilk
- ';ill'(�`�1'`X -;� r - �'" -
—\\,,,,,,:,\, . , __
ii,ilte,-.1 ( •
tti 1 -'.. 1, t U'', T . ` jl! k A •
'T •; \,:1-..-.__..42,‘,J,."'.._- .
.\:. .\ 4\ 9 " •. 5.s., .. h ,At
1B11 !it `so. ice.
\\ to. v
9
K\ 55 1 ` a -k41A (+�• ��-
r\'',....viN, 'V. r.,,,, ,04..._ .1./.,' :0,*.,,,,,.:,
It '24. ,,--_:.S �1� *.'t 1 1k ,`/p •+ .� Fy , ,tJ t hit.r.' ^1_�—
1.'if / ti
■�f4'it!' "'.J,�,l tl c, (rx. (r' 1 1
J, , \\-\.\\:,:,(i,w, „...,,,,:j,,c,,,o. Fiil,,;;,,,. ... ,- ,.i. -•:„.14t1.74, ., / 4-_----:-.--,„, \ il ,•
:iv__ )h
i,:', ,,\ , \ ,. 'I if, \ ,,elt,- `'.---,,' ,• ',...'. '`,t,'-,1,,, \:\ 11:
)) 1 \ 1 ,,i,,, •• 'i 1 \'t,, ' ',\.‘ww.,11P.,''L ''1,, ‘S.V '
f 1
r t9 U t �y,.' ap �1 \ 'r
� , i\ ,---,Irk \\
Figure 2. Conceptual layout of the temporary supplemental pumping system (60,000
gpm) with nine floating screened intake pipes connected to pumps leading to a manifold
that directs flow into a single pipe that will discharge to the condenser cooling water
canal of Allen Steam Station.

,.,'*. fez hf,'e - .. „ I >' ;�/
fz {
ri'4;'''''-i-`-lr'--' ' ;4#1441, ,-
11 tt 4,4*-:,- f 7w "fi rr
Figure 3. Temporary floating intake piping used to pump water from the Dan River to
Belews Lake in North Carolina from January through March in 2008.

-- -'-...:\HL
,, ... i ' • 1 j
1 //1, ` ! , J.
.r •
„i • +` '1. fir• P
. •ilk. ?+11 -— , 4, .1is,,) ) s mi / . ,4 ,
\Vs' •'"1, -**V&N AV • :0,,,,,„„ ...,,,, , ,, ,„,
,1, „tee.
fa
. r..a. ^ `".. � rf /�'/'ram". y $a. y *
7 ate � '
1 �I�' - n `
. . .. `-�'
/ - ,_ ,
Figure 4. Temporary pumping system used to pump water from the Dan River to Belews
Lake in North Carolina from January through March in 2008.

-_. r -...ems .Y_ — d.r-:sj(. 1 '`a .-....r ti:.• -r "'�^"�
r
►w
•
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Figure 5. Discharge of water pumped from the Dan River to Belews Lake in North
Carolina from January through March 2008.

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ifr."., °8) :t„I Mtn•;' PPPPPi��{{�I6 '' 7i• • 0, • -
•
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,3 '1 -.:— . r, 3o' e. -e, t' f k ` 1:5' -tom''w'. , '''''.* yR ."'1 ' $..ii .
�� ram. yq, , x \,d ,..y...y�s-r , .4,{..M„�... ' !.
wil
t is,` f 4.1 y ' • +It. Z+W: c:1 ' ,}„sly '. 'Y *.) Y Mt'iVt . `,1
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•,� 4 �T A.eu�1r1 tif7�+,� sL
•
+:X\�l��.i r..• dye a.'Si*i K :il.
Figure 6. The frame of the photo is the width(120 feet) of the shoreline buffer that the
temporary piping will cross. Hand cutting of trees will be necessary to deploy the nine
floating intake pipes at Allen Steam Station.

- a
00- : 1r
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Figure 7. Conceptual layout of the proposed permanent supplemental cooling water
pumping system 240,00 gpm) with submerged wedge wire screened intake pipes
connected to pumps will direct flow into four pipes that will discharge to the condenser
cooling water canal of Allen Steam Station.

f
Duke Duke Energy Corporation
ref Energy® 526 South Church St.
Charlotte, NC 28202
Mailing Address:
PO Box 1006
Charlotte, NC 28201-1006
January 24, 2008
Q
NC Dept of Environment and Natural Resources "
Attention: Central Files FEB 2 0 2008
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy
NPDES Discharge Monitoring Report for:
Allen Steam Station - 4C0004979-Gaston County
Belews Creek Steam Station - NC0024406-Stokes County
Buck Steam Station - NC0004774- Rowan County
Cliffside Steam Station - NC0005088- Rutherford County
Dan River Steam Station- NC0003468-Rockingham County
Lincoln Combustion Turbine Station -NC0080781 - Lincoln County
Marshall Steam Station -NC0004987-Catawba County
Riverbend Steam Station - NC0004961 -Gaston County
Rockingham County Combustion Turbine Facility—NC0086665—Rockingham County
In accordance with Part II, D(2) of the above referenced NPDES permits, the original and one copy of the
monthly monitoring report foraillIMININISPare attached.
At Dan River Steam Station, the downstream sample point for Total Arsenic and Total Selenium was
designated in the NPDES permit to be 2,500 feet downstream of the ash basin outfall. Fieldcrest Cannon
(Pillowtex) had a sampling platform on their property that met the downstream sampling location criteria,
but this location has shut down; thus the sampling platform can not presently be accessed by Duke
employees. This was communicated to the State on February 24, 2004 and it was agreed that the sample
location would be relocated to the NCSR 700 Bridge crossing.
All values reported on the attached reports are dependent on the accuracy of approved analytical methods
used to measure parameters.
Please direct any correspondence or questions concerning the subject facility NPDES Program to Allen
Stowe at(704) 382-4309.
Yours truly,
467.��ryV� irf�'ll�� P tic( " , -%,%. l /7."
Patrick J. McCabe, P.E. "aaArter d
Manager—Env Field Support
Attachments
/phs IBC DENR MRO
DWQ-Surface Wafer Protection
www duke-energy.corn

•
•
__BY Milli&FILM
JAN 29 08
•
•
•;?-••
kt•
•
•
. .
. . .

• SW
E ENT FEB 18 2008
NPDES PERMIT NO. NC0004979 DISCHARGE NO. 00 MONTH December YEAR 2007
FACILITY NAME Allen Steam Station CLASS I COUNTY Gaston
OPERATOR IN RESPONSIBLE CHARGE (ORC) Don S ggs GRADE I PHONE [phone]
CERTIFIED LABORATORIES (1)Duk ower Env.Services-248 (2)
CHECK BOX IF ORC HAS CHANGED 0 PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL and ONE COPY to:
NCDENR/DIVNT ON: ENOF WATER QUALITY X J ?3 � ` of
WATER QUALITY SECTION U-\
ATTENTION:CENTRAL FILES � //2
1617 MAIL SERVICE CENTER (SIGNATURE OF OPERATOR IN RESPONSIBLE CHARGE) DATE
RALEIGH,NC 27699-1617
By this signature,I certify that this report is accurate and complete to the best of my knowledge. ^^ A
a sooso moil `a�C
w
w Flow
w 6§ y NZ EFF x S. FEB 2 0 2008
Z O INF
° Ill g° 6 �w -
$ o§
HRS HRS Y/N MGD F
1 0700 9 B 591.0 78
2 0700 9 B 501.1 76
3 0700 9 Y 502.0 79
4 0700 9 Y 669.3 75
5 0700 9 Y 682.6 76
6 0700 9 Y 682.6 75
7 0700 9 B 682.6 75
8 0700 9 B 682.6 73
9 0700 9 B 682.6 77
1a 0700 9 Y 682.6 80
i1 0700 9 Y 682.4 80
12 0700 9 Y 620.7 81
13 0700 9 Y 620.6 82
14 0700 9 B 651.0 84
15 0700 9 B 682.6 83
1s 0700 9 B 682.6 83
17 0700 9 B 682.8 81
18 0700 9 Y 682.6 79
1s 0700 9 Y 682.6 78
20 0700 9 Y 682.6 78
21 0700 9 B 682.6 78
22 N 681.0 74
23 N 516.8 68
24 N 500.4 70
25 0700 9 B 541.2 66
26 0700 9 B 562.3 71
27 0700 9 B 562.3 72
28 0700 9 B 562.3 70
29 0700 9 B 307.2 59
30 0700 9 B 336.2 59
31 0700 9 B 562.3 67
Average 607.9 75
Maximum 682.8 84
Minimum 307.2 59
Comp.(C)/Grab(G) G
Monthly Limit 95
Facility Status:(Please check one of the following) DEM Form MR-1(8/94)
All monitoring data and sampling frequencies meet permit requirements I X I Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements Noncompliant See Attachment
"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 awar that there are si ' cant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."Stephen J.Immei ' 1..,' 7 i
Permittee(Please print or type) Signature of P itt Da
243 Plant Allen Rd.Belmont,NC 28012 704-829-2400 5/31/2010
Permittee Address Phone Number Permit Exp.Date
"ORC must visit facility and document visitation of facility as required per 15A NCAC 8A.0202(b)(5)(B).
"If signed by other than the permittee,delegation of signatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(D).
""Multiple Systems Operating
The monthly average for fecal coliform is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting data.

QA
EFFLUENT FEB 2 0 2008
NPDES PERMIT NO. NC0004979 DISCHARGE NO. 002 MONTH December YEAR 2007
FACILITY NAME Allen Steam Station CLASS I COUNTY Gaston
OPERATOR IN RESPONSIBLE CHARGE (ORC) Don Scruggs GRADE I PHONE [phone]
CERTIFIED LABORATORIES (1)Duke Power Env.Services-248 (2)
CHECK BOX IF ORC HAS CHANGED ❑ PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL and ONE COPY to:
NCDENR/DIVISION OF WATER QUALITY ii< (�^
WATER QUALITY SECTION X �} c; //7 clf
ATTENTION:CENTRAL FILES �` V
1617 MAIL SERVICE CENTER (SIGNATURE OF OPERATOR IN RESPONSIBLE CHARGE) DATE
RALEIGH,NC 27699-1617
By this signature,I certify that this report is accurate and complete to the best of my knowledge.
y 50050 00400 00558 00530 01042 01045 01147 00800 TOP3B
ULu
(3 P w Flow E 1
V ul ~ g E 6 5
w $ �j y ZN EFF X id h
e '� Q+ "p
QFH QZ O INF n ( 3 c •2 c
0
HRS HRS Y/N MGD SU mg/I mg/I mg/I mg/I ug/l mg/I P/F
1 0700 9 B
2 0700 9 B
3 0700 9 Y
4 0700 9 Y 18.2 6.7 13.0 0.009 0.10 5.7
5 0700 9 Y
6 0700 9 Y
7 0700 9 B
8 0700 9 B
9 0700 9 B ,
10 0700 9 Y
ii 0700 9 Y 20.3
12 0700 9 Y
13 0700 9 Y
14 0700 9 B
15 0700 9 B
16 0700 9 B
17 0700 9 B 0.015 7.3
18 0700 9 Y 18.8
19 0700 9 Y
20 0700 9 Y
21 0700 9 B
22 N
23 N
24 N
25 0700 9 B
26 0700 9 B
27 0700 9 B 19.1
28 0700 9 B
29 0700 9 B
30 0700 9 B
31 0700 9 B
Average 19.1 MEI 13.0 0.012 0.10 6.5
Maximum 20.3 6.7 13.0 0.015 0.10 7.30
Minimum 18.2 6.7 13.0 0.009 0.10 5.7
Comp.(C)/Grab(G) G G G G G G G G
Monthly Limit 6.0-9.0 15.0 30.0 — — — — 24
Facility Status:(Please check one of the following) DEM Form MR-1(8/94)
All monitoring data and sampling frequencies meet permit requirements X Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements Noncompliant See Attachment
"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 signifi nt penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
Stephen J.Immel q-7fos
Permittee(Please print or type) Signature of Perm D
243 Plant Allen Rd.Belmont,NC 28012 704-829-2400 5/31/2010
Permittee Address Phone Number Permit Exp.Date
'ORC must visit facility and document visitation of facility as required per 15A NCAC 8A.0202(b)(5)(B).
"H signed by other than the permittee,delegation of signatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(D).
"'Multiple Systems Operating
The monthly average for fecal col form is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting data.

• QA
EFFLUENT F E B 2 0 2008
NPDES PERMIT NO. NC0004979 DISCHARGE NO. 002A MONTH December YEAR 2007
FACILITY NAME Allen Steam Station CLASS I COUNTY Gaston
OPERATOR IN RESPONSIBLE CHARGE (ORC) Don Scruggs GRADE I PHONE [phone]
CERTIFIED LABORATORIES (1)Duke Power Env.Services-248 (2)
CHECK BOX IF ORC HAS CHANGED ii PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL and ONE COPY to:
NCDENR/DIVISION OF WATER QUALITY ,� �J /
WATER QUALITY RALTIOE tM / �1 /2/5"
ATTENTION:CENTRAL FILESX &ui C..
1617 MAIL SERVICE CENTER (SI NATURE OF OPERATOR IN RESPONSIBLE CHARGE DATE
RALEIGH,NC 27699.1617
By this signature,I certify that this report is accurate and complete to the best of my knowledge.
.� 50050 00400 00530 311516 01045 00552
oU i
U P.'
t Row
.. 6- Zw EFF X L _ II
oOF H K O O INF o.
o~ O o .2 u. a
HRS HRS Y/N MGO SU mg/I #/100ml mg/I mg/I
1 0700 9 B No Flow
2 0700 9 B No Flow
3 0700 9 Y No Flow
4 0700 9 Y No Flow
5 0700 9 Y No Flow
6 0700 9 Y No Flow
7 0700 9 B No Flow
8 0700 9 B No Flow
9 0700 9 B No Flow
10 0700 9 Y No Flow \
11 0700 9 Y No Flow \`
12 0700 9 Y No Flow
13 0700 9 Y No Flow \,......VI
14 0700 9 B No Flow
15 0700 9 B No Flow
16 0700 9 B No Flow
17 0700 9 B No Flow
18 0700 9 Y No Flow
19 0700 9 Y No Flow
zo 0700 9 Y No Flow
21 0700 9 B No Flow
22 N No Flow
23 N No Flow
24 N No Flow
25 0700 9 B No Flow
26 0700 9 B No Flow _
27 0700 9 B No Flow
28 0700 9 B No Flow
29 0700 9 B No Flow
30 0700 9 B No Flow
31 0700 9 B No Flow
Average 0.0
Maximum
Minimum
Comp.(C)/Grab(G) G G G G G
Monthly Limit 30.0 15.0
Facility Status:(Please check one of the following) DEM Form MR-1(8/94)
All monitoring data and sampling frequencies meet permit requirements X Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements Noncompliant See Attachment
'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 sign' penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations'
Stephen J.Immel 1 ‘.141221._
Permittee(Please print or type) Signature of Pe Da
243 Plant Allen Rd.Belmont,NC 28012 704-829-2400 5/31/2010
Permittee Address Phone Number Permit Exp.Date
'ORC must visit facility and document visitation of facility as required per 15A NCAC 8A.0202(b)(5)(B).
"if signed by other than the permittee,delegation of signatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(D).
"'Multiple Systems Operating
The monthly average for fecal coliform is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting data.

•
EFFLUENT
NPDES PERMIT NO. NC0004979 DISCHARGE NO. 002B MONTH December YEAR 2007
FACILITY NAME Allen Steam Station CLASS I COUNTY Gaston
OPERATOR IN RESPONSIBLE CHARGE (ORC) Don Scruggs GRADE I PHONE [phone]
CERTIFIED LABORATORIES (1)Duke Power Env.Services-248 (2)
CHECK BOX IF ORC HAS CHANGED 0 PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL and ONE COPY to:
NCDENR I DIVISION OF WATER QUALITY
WATER QUALITY SECTION
ATTENTION:CENTRAL FILES X`C5 ` ll C/W(� / ///�� V
1617 MAIL SERVICE CENTER ATURE OF OPERA R IN RESPONSIBLE CHARG DATE
RALEIGH.NC 27699-1617
By this signature,I certify that this report Is accurate and complete to the best of my knowledge.
50050 00400 00530 00552 01045 01042
oU w Flow
V rcrcw 1z_
a 0 wcc 8 o y O INF x n po 2 3
0 1 W w U Y W V)N .5 3 / {�
W, g o� s 3
HRS HRS YIN MGD SU mg/I mg./1 mg/I mg/I
1 0700 9 B No Flow F E B 2 Co 2008
2 0700 9 B No Flow
3 0700 9 Y No Flow
4 0700 9 Y No Flow
5 0700 9 Y No Flow
6 0700 9 Y No Flow
7 0700 9 B No Flow
8 0700 9 B No Flow
9 0700 9 B No Flow
10 0700 9 Y No Flow `�
12 0700 9 Y No Flow c..,\NV
v_12 0700 9 Y No Flow
13 0700 9 Y No Flow
14 0700 9 B No Flow O
15 0700 9 B No Flow \'%16 0700 9 B No Flow
17 0700 9 B No Flow
18 0700 9 Y No Flow
19 0700 9 Y No Flow
20 0700 9 Y No Flow
21 0700 9 B No Flow
22 N No Flow
23 N No Flow
24 N No Flow
25 0700 9 B No Flow
26 0700 9 B No Flow
27 0700 9 B No Flow
28 0700 9 B No Flow
29 0700 9 B No Flow
30 0700 9 B No Flow
31 0700 9 B No Flow
Average 0.0
Maximum
Minimum
Comp.(C)/Grab(G) G G G G G
Monthly Limit 30.0 15.0
Facility Status:(Please check one of the following) DEM Form MR-1(8/94)
All monitoring data and sampling frequencies meet permit requirements X Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements Noncompliant See Attachment
"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."
Stephen J.Immel
Permittee(Please print or type) Signature of Pe Dat
243 Plant Allen Rd.Belmont,NC 28012 704-829-2400 5/31/2010
Permittee Address Phone Number Permit Exp.Date
"ORC must visit facility and document visitation of facility as required per 15A NCAC 8A.0202(b)(5)(B).
'"If signed by other than the permittee,delegation of signatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(D).
"`"Multiple Systems Operating
The monthly average for fecal coliform is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting data.

` EFFLUENT QA
FACILITIES ENAME Al RMIT NO. e0 004979 Steam Station DISCHARGE NO. 003 MCLASS DecemberONTH l f ECb 2 on
OPERATOR IN RESPONSIBLE CHARGE (ORC) Don Scruggs GRADE I PHONE [phone]
CERTIFIED LABORATORIES (1) Duke Power Env.Services-248 (2)
CHECK BOX IF ORC HAS CHANGED ❑ PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL and ONE COPY to:
NCDENR/DIVISION OF WATER QUALITY ////JJ
WATER QUALITY SECTION 4`'r', / /77 o C/
ATTENTION:CENTRAL FILES X ~'a✓Y�l �//I / Q
1617 MAIL SERVICE CENTER (SIGNATURE OF OPERATOR IN RESPONSIBLE CHA� DATE
RALEIGH,NC 27699-1617
By this signature,I certify that this report is accurate and complete to the best of my knowledge.
50050
oU Flow
U ~w I-
'II! 8 6 N ZN EFF X
Oa f-a ¢Z O INF
HRS HRS YIN MGD
1 0700 9 B
2 0700 9 B
3 0700 9 Y
4 0700 9 Y
5 0700 9 Y
6 0700 9 Y 4.5
7 0700 9 B
8 0700 9 B
s 0700 9 B
10 0700 9 Y
11 0700 9 Y
12 0700 9 Y 4.5
13 0700 9 Y
14 0700 9 B
15 0700 9 B
16 0700 9 B
17 0700 9 B
16 0700 9 Y
1s 0700 9 Y
20 0700 9 Y 4.5
21 0700 9 B
22 N
23 N
24 N
25 0700 9 B
26 0700 9 B
27 0700 9 B 4.5
26 0700 9 B
29 0700 9 B
30 0700 9 B
31 0700 9 B
Average 4.5
Maximum 4.5
Minimum 4.5
Comp.(C)/Grab(G)
Monthly Limit
Facility Status:(Please check one of the following) DEM Form MR-1(8/94)
All monitoring data and sampling frequencies meet permit requirements ( X I Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements Noncompliant See Attachment
"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."
Stephen J.Immel '
i4f22;?_
Permittee(Please print or type) Signature of ' ee" Date
243 Plant Allen Rd.Belmont,NC 28012 704-829-2400 _ 5/31/2010
Permittee Address Phone Number Permit Exp.Date
'ORC must visit facility and document visitation of facility as required per 15A NCAC 8A.0202(b)(5)(B).
"If signed by other than the permittee,delegation of signatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(D).
"'Multiple Systems Operating
The monthly average for fecal coliform is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting data.

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EFFLUENT
NPDES PERMIT NO. NC0004979 DISCHARGE NO. 004 MONTH December YEAR 2007
FACILITY NAME Allen Steam Station CLASS I COUNTY Gaston
OPERATOR IN RESPONSIBLE CHARGE (ORC) Don Scruggs GRADE I PHONE [phone]
CERTIFIED LABORATORIES (1)Duke Power Env.Services-248 (2)
CHECK BOX IF ORC HAS CHANGED 0 PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL aid ONE COPY to:
NCDENR/DIVISION OF WATER QUALITY
WATER QUALITY SECTION X
ATTENTION:CENTRAL FILES
1617 MAIL SERVICE CENTER (SIGNATURE OF OPERA OR IN RESPONSIBLE CHARG DATE
RALEIGH,NC 27699-1617
By this signature,I certify that this report Is accurate and complete to the best of my knowledge.
Y 50050 00556
>`1 w
O - w Flow
d 6 g g i EFF X
i.1N gZ O INF O
G w W O >W
ag $ 6 <~ O
O~ o
HRS HRS Y/N MGD mg/I
1 0700 9 B
2 0700 9 B
3 0700 9 Y
4 0700 9 Y
5 0700 9 Y
6 0700 9 Y 6.5
7 0700 9 B
8 0700 9 B
s 0700 9 B
10 0700 9 Y
11 0700 9 Y
12 0700 9 Y 6.5
13 0700 9 Y
14 0700 9 B
15 0700 9 B
16 0700 9 B
17 0700 9 B
18 0700 9 Y
i9 0700 9 Y
zo 0700 9 Y 6.5
21 0700 9 B
22 N
23 N
24 N
25 0700 9 B
26 0700 9 B
27 0700 9 B 6.5
28 0700 9 B
29 0700 9 B
30 0700 9 B
31 0700_ 9 B
Average 6.5
Maximum 6.5
Minimum 6.5
Comp.(C)/Grab(G) G
Monthly Limit — 15.0
Facility Status:(Please check one of the following) DEM Form MR-1(8/94)
All monitoring data and sampling frequencies meet permit requirements X Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements Noncompliant See Attachment
'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.-
Stephen J.Immel
Permittee(Please print or type) Signature of Pe nee** -1344-C22-
243 Plant Allen Rd.Belmont,NC 28012 704-829-2400 5/31/2010
Permittee Address Phone Number Permit Exp.Date
'ORC must visit facility and document visitation of facility as required per 15A NCAC 8A.0202(b)(5)(B).
"H signed by other than the permittee,delegation of signatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(D).
""Multiple Systems Operating
The monthly average for fecal coliform is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting data.

(m4
W A TFR Michael F.Easley,Go or
0 pG William G.Ross Jr.,Secretary Sovg
Vj North Carolina Department of Environment and Natural Resources
--I Coleen H.Sullins,Director
5 'C Division of Water Quality
June 1, 2007
Mr. Don Scruggs
Duke Power Company
Allen Steam Station
253 Plant Allen Road
Belmont,North Carolina 28012
Subject: Compliance Evaluation Inspection
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County,North Carolina
•
Dear Mr. Scruggs,
Enclosed please find a copy of the Compliance Evaluation Inspection Report for the
inspection conducted at the subject facility on May 30, 2007 by Mrs. Sonja Basinger of this
Office.
The report should be self-explanatory; however, should you have any questions
concerning the report, please do not hesitate to contact me at [phone].
Sincerely,
for Robert B. Krebs
Surface Water Protection Regional Supervisor
Enclosure
cc: Gaston County Health Department
SWB
h1MENR
N.C.Division of Water Quality,Mooresville Regional Office,610 East Center Avenue,Suite 301,Mooresville NC 28115 [phone] Customer Service
1-877-623-6748

United States Environmental Protection Agency Form Approved.
EPA Washington,D.C.20460
OMB No.2040-0057
Water Compliance Inspection Report Approval expires 8-31-98
Section A: National Data System Coding(i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 ' j 2 ICI 31
NC0004979 1 11 121 07/05/30 117 18t rt 19' GI 20[J
1=I Remarks I
21IIIIII1111111111IIIIIIIIIIIIIIIIIIIIIIII111111I66
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA Reserved
671 2.0 169 70(uq u
71 N I 721211 731 I 174 7511 I I I I I 180
Section B: Facility Data -
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number)
01:15 PM 07/05/30 06/10/01
Plant Allen Steam Station
NCSR 2525 Exit Time/Date Permit Expiration Date
Belmont NC 28012 03:00 PM 07/05/30 10/05/31
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Donald Lynn Scruggs/ORC/704-829-2423/
Name,Address of Responsible Official/Title/Phone and Fax Number
Jimmie Allen Stowe,526 S Church St Charlotte NC Contacted
282011002//704-382-4309/7043829840 No
Section C: Areas Evaluated During Inspection(Check only those areas evaluated)
I.Permit In Flow Measurement 1.Operations&Maintenance •Records/Reports
II Self-Monitoring Program •Facility Site Review •Effluent/Receiving Waters III Laboratory
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Signature(s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Sonja Basinger MRO WQ//704-235-2202/
_
S 4. _, • y/7 I P I AA U}) Z«
Si nature of -4,0„-,t-A-1,9,cy—
Management Q A R viewer Agency/Office/Phone and Fax Numbers Date
�� � � �`
Marcia' 7+1Tocco - MRO WQ//704-235-2204/
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

Pri
NPDES yr/mo/day Inspection Type (cont.) 1
3I NC0004979 I11 12I 07/05/30 117 181 C
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
PERMIT:
Outfall 001: Discharge of once through non-contact cooling water.
Outfall 002: An ash pond discharge consisting of septic tank/ sand filter effluent, ground
water remediation system effluent, coal yard drainage, boiler room drainage,
turbine room drainage, and stormwater runoff.
Outfall 002A: Coal yard sump overflow.
Outfall 002B: Power house sump overflow.
Outfall 003: Discharge of miscellaneous non-contact cooling water.
Outfall 004: Discharge of miscellaneous non-contact cooling water, vehicle wash water (water
only), intake screen backwash, and intake filter backwash.
FACILITY SITE REVIEW:
Outfall 001: The condenser cooling water is conveyed to the discharge canal that flows to the
South Fork Catawba River.
Outfall 002: Chemical treatment for the removal of selenium consist of ferric sulfate addition,
and pH adjustment consist of using caustic.
The ash basin discharges to the Catawba River.
Outfall 002A and 002B: No overflows occurred in the subject review period.
Outfall 003: Discharges to South Fork Catawba River through the discharge canal.
Outfall 004: Discharges to the Catawba River.
Page# 2

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 05/30/2007 Inspection Type: Compliance Evaluation
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? ❑ 0 ■ 0
Is the facility as described in the permit? ■ ❑ ❑ ❑
#Are there any special conditions for the permit? 0 0 ■ 0
Is access to the plant site restricted to the general public? ■ ❑ ❑ ❑
Is the inspector granted access to all areas for inspection? ■ ❑ ❑ ❑
Comment: The facility's permit is effective from October 1, 2006 through May 31, 2010.
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? ■ ❑ ❑ ❑
Is all required information readily available, complete and current? ■ ❑ ❑ ❑
Are all records maintained for 3 years(lab. reg. required 5 years)? ■ ❑ ❑ ❑
Are analytical results consistent with data reported on DMRs? ■ ❑ ❑ ❑
Is the chain-of-custody complete? ■ ❑ ❑ ❑
Dates,times and location of sampling ■
Name of individual performing the sampling ■
Results of analysis and calibration ■
Dates of analysis ■
Name of person performing analyses ■
Transported COCs ■
Are DMRs complete: do they include all permit parameters? ■ ❑ ❑ ❑
Has the facility submitted its annual compliance report to users and DWQ? 0 0 ■ 0
(If the facility is=or>5 MGD permitted flow)Do they operate 24/7 with a certified operator on each shift? 0 0 ■ 0
Is the ORC visitation log available and current? ■ ❑ ❑ ❑
Is the ORC certified at grade equal to or higher than the facility classification? ■ ❑ ❑ ❑
Is the backup operator certified at one grade less or greater than the facility classification? ■ ❑ ❑ ❑
Is a copy of the current NPDES permit available on site? ■ ❑ ❑ ❑
Facility has copy of previous year's Annual Report on file for review? 0 0 ■ 0
Comment: DMRs were reviewed from the period of July 2006 through March 2007. No
violations were reported for the review period.
Operations&Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ ❑ ❑ ❑
Page# 3

rir'
Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 05/30/2007 Inspection Type: Compliance Evaluation
Operations&Maintenance Yes No NA NE
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids,pH, DO, Sludge ❑ ❑ ■ ❑
Judge, and other that are applicable?
Comment: The facility appeared well maintained and operated at the time of the
inspection. The ORC was very courteous and knowledgeable about the plant processes.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? ■ ❑ ❑ ❑
Are all other parameters(excluding field parameters)performed by a certified lab? ■ ❑ ❑ ❑
#Is the facility using a contract lab? U ❑ ❑ ❑
Is proper temperature set for sample storage(kept at 1.0 to 4.4 degrees Celsius)? • ❑ ❑ ❑
Incubator(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? 0 0 ■ 0
Incubator(BOD)set to 20.0 degrees Celsius+/- 1.0 degrees? 0 0 ■ 0
Comment: The on-site lab (certification # 5134) is field certified for pH and
temperature. Toxicity testing is performed by Environmental Testing Solutions. Duke
Energy Analytical Laboratory (certification #248) conducts all other analyses.
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? 0 0 ■ 0
Is flow meter calibrated annually? 0 0 • 0
Is the flow meter operational? 0 0 • 0
(If units are separated)Does the chart recorder match the flow meter? 0 0 ■ 0
Comment: Flow is measured by calculating the rate of flow from pump run times for
outfall 001. A staff gauge is used to measure flow at outfall 002 (ash basin discharge).
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? 0 0 • 0
Is sample collected below all treatment units? U ❑ ❑ ❑
Is proper volume collected? ■ ❑ ❑ ❑
Is the tubing clean? ❑ ❑ ■ ❑
Is proper temperature set for sample storage(kept at 1.0 to 4.4 degrees Celsius)? U ❑ ❑ ❑
Is the facility sampling performed as required by the permit(frequency, sampling type representative)? ■ ❑ ❑ ❑
Comment: Grab samples are required by the facility's permit.
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? ■ ❑ ❑ ❑
Are the receiving water free of foam other than trace amounts and other debris? U ❑ ❑ ❑
Page# 4

Permit: NC0004979 Owner-Facility: Plant Allen Steam Station
Inspection Date: 05/30/2007 Inspection Type: Compliance Evaluation
Effluent Pipe Yes No NA NE
If effluent (diffuser pipes are required) are they operating properly? n n • n
Comment: All outfalls appeared to be well maintained and were readily accessible. No
adverse impacts to the receiving waters were observed.
•
Page# 5

Duke DUKE ENERGY CAROLINAS
ALLEN STEAM STATION/253 Plant Allen Rd.
(Energy® Belmont. NC 28012
Carolinas 704 829 2350
704 829 2370 fax
November 9, 2007 RECEIVED
Mr. John Lesley
Mooresville Regional Office NOV 1 3 2C07
North Carolina Department of Environment and Natural Resources
610 East Center Avenue, Suite 301 NC DENR MRO
Mooresville,NC 28115
SubJ'ect: Duke Power Com an DWSurtace Water Protection
p y
Plant Allen
NPDES Permit Number NC0004979
Dear Mr. Lesley:
This letter fulfills the 5 day written notification requirement as stipulated by the NPDES permit Part
II, Section E. 6. a. On the evening of November 7, 2006, a leak was discovered in"A" ash line which
ultimately led to 13,000 gallons of ash sluice water being discharged to the Catawba River via
NPDES Outfall 004. The line was immediately isolated and repairs were completed. Mr. John Lesley
of your office was notified of this release on Thursday, November 8th at 8:30 am. Additional
notifications were made to the news media as required by N.C. Gen. Stat. 143-215.1C. No adverse
impact to the environment was observed.
If additional information is requested please contact Don Scruggs at [phone].
Sincerely,
G�w
Stephe . Immel
Station Manager
WOW.duke-energy.cum

bc: Allen Stowe- EC13K
Pat McCabe- EC13K
Steve Immel-Plant Allen
Don Scruggs-Plant Allen
Record Number: 404.060.01 (Plant Allen)
CERTIFIED MAIL: 7099 3400 0012 0549 1648

Collection System SSO 24-Hour Notification
Collection System: SSO WQCS#
Incident Number from BIMS aZbb7 03Z3_
Incident Reviewed (Date): YBPJ
Incident Action Taken:
NOV
NGDD04 1 —
1 ) b1 Time 4. am/ S
Spill Date t)
1 �
Reported Date 1 Time 31' am/ pm
Reported To SWP Staff or EM Staff J •
Reported By 'ice SG-On e S Phone 7D4- ,Z5- Z6/23
Address of Spill A -e n ,,, D
County G City t ,
Cause of Spill4t--,H-
Total Estimated Gallons ) 3 DV Est. Gal to Stream )
Stream Fish Kill: Yes No Number Species
Non Required Information and other comments relating to SSO incident:
Response time MH# Map Quad Zone

Permit# Owner and Facility Name Permit# Owner and Facility Name '4444
WQCS00253 Bradfield Farms Water Company CS WQCS00171 Greater Badin CS
WQCS00196 Carolina Water Service Cabarrus Woods CS WQCS00322 Aqua Country Woods East CS
WQCS00233 Carolina Water Service Hemby Acres CS WQCS00222 Town of Boiling Springs CS
WQCS00001 Charlotte-Mecklenburg CS WQCS00341 Town of China Grove CS
WQCS00016 City of Albemarle CS WQCS00231 Town of Cleveland CS
WQCS00046 City of Belmont CS WQCS00058 Town of Cramerton CS
WQCS00107 City of Bessemer City CS WQCS00165 Town of Dallas CS
WQCS00089 City of Cherryville CS WQCS00342 Town of E. Spencer CS
WQCS00221 City of Claremont CS WQCS00328 Town of Harrisburg CS
WQCS00326 City of Concord CS WQCS00343 Town of Landis CS
WQCS00088 City of Conover CS WQCS00310 Town of Longview CS
WQCS00017 City of Gastonia CS WQCS00120 Town of Maiden CS
WQCS00020 City of Hickory CS WQCS00344 Town of Marshville CS
WQCS00327 City of Kannapolis CS WQCS00043 Town of Mooresville CS
WQCS00036 City of Kings Mountain CS WQCS00125 Town of Mt Pleasant CS
WQCS00040 City of Lincolnton CS WQCS00153 Town of Norwood CS
WQCS00164 City of Lowell CS WQCS00190 Town of Oakboro CS
WQCS00026 City of Monroe CS WQCS00325 Town of Stanfield CS
WQCS00059 City of Mount Holly CS WQCS00180 Town of Stanley CS
WQCS00044 City of Newton CS WQCS00135 Town of Taylorsville CS
WQCS00019 City of Salisbury CS WQCS00258 Town of Troutman CS
WQCS00037 City of Shelby CS WQCS00345 Town of Wingate CS
WQCS00030 City of Statesville CS WQCS00054 Union County CS
WQCS00149 East Lincoln CS WQCS00009 WSA Cabarrus Co. CS
Deemed Permitted
Permit# Owner and Facility Name Permit# Owner and Facility Name
WQCSD0130 Brooks Food Group-Brooks Food Group WQCSD0120 Martin Marietta Mallard Creek
WQCSD0114 Charlotte Mecklenburg Schools-Misc Laterals WQCSD0019 Town of Richfield CS
WQCSD0057 City of High Shoals CS WQCSD0024 Town of Grover CS
WQCSD0117 Duke Energy Marshall Steam Station WQCSD0038 Town of McAdenville CS
WQCSD0116 Goose Creek Utilities Fairfield Plantation WWTP WQCSD0002 Town of Ranlo CS
WQCSD0101 Harborside Dev LLC-Midtown T CS WQCSD0049 Town of Spencer Mountain CS
WQCSD0095 Kennerly Dev. Group LLC-Boardwalk Villas CS
WQCSD0098 Kennerly Dev. Group LLC-Kings Point CS
WQCSD0105 Kennerly Dev. Group LLC-Moon Bay Condos CS
WQCSD0107 Kennerly Dev. Group LLC-Schooner Bay CS WQCSD0252 All other private spills which do not have
a permit number assigned
WQCSD0099 Kennerly Dev. Group LLC-Spinnaker Point CS
WQCSD0112 Lake Norman-South Point CS
WQCSD0104 Lake Norman-Villas S Harbour CS
WQCSD0102 Lake Norman-Vineyard Pt Resort CS
WQCSD0064 Lincoln County CS
WQCSD0097 Martin Dev Group-North Point&Portside CS

W A rFi4Michael F.Easley,Govemor,„
QWilliam G.Ross Jr.,Secretary
North C a D f E
arolinepartment onvironment and Natural Resources
Alan W.Klimek,P.E.Director
Division of Water Quality
July 17, 2006
Mr. Don Scruggs
Duke Power Company-Allen Steam Station
253 Plant Allen Road
Belmont,NC 28012
Subject: Compliance Evaluation Inspection
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County,NC
Dear Mr. Scurggs: •
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection
conducted at the subject facility on July 14,2006 by Mr. John Lesley of this Office. The operation
and maintenance of the facility are commendable. Toxicity test results will be forwarded under
separate cover when available.
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,
c`
. Rex Gleason, P.E.
Surface Water Protection Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
JL •
am` Carolina
14CDE NNaturally
Mooresville Regional Office Division of Water Quality Phone [phone] Customer Service
Internet: www.ncwaterquality.org 610 East Center Ave,Suite 301 Mooresville,NC 28115 Fax [phone]
An Equal Opportunity/Affirmative Action Employer—50%Recyced/10°%Post Consumer Paper

`„�� United States Environmental Protection Agency,Washington,DC 20460 Form Approved
NPDES Compliance Inspection Report AvTA OMB No.2040-0003
North Carolina Department of Environment and Natural Resources Approval Expires
•[ Division of Water Quality,Mooresville Regional Office NCDENR 7/31/85
Section A: National Data System Coding
Transaction Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector Facility Type
N 5 NC0004979 06/07/14 B S 2
Inspection Work Days Facility Self-Monitoring Evaluation Rating BI QA ....Reserved
2 5 N N
Section B: Facility Data
Entry Time: Permit Effective Date:
Name and Location of Facility Inspected: 10:50 am July 1,2002
Duke Power Allen Steam Station Exit Time:
off Highway 273,south of Belmont 12:00 pm Permit Expiration Date:
Gaston County,North Carolina Date: May 31,2005
07/14/2006
• Name(s)of On-Site Representatives------Title(s)------Phone No(s):
Don Scruggs/ORC/704-829-2423
Name and Address of Responsible Official: Title:
Mr.Don Scruggs Scientist-Power Generation Allen Steam Station
Duke Power Company-Allen Steam Station Phone No. Contacted?
253 Plant Allen Road 704-829-2423 Yes
Belmont,NC 28012
Section C:
Areas Evaluated During Inspection
® Permit E Flow Measurement 0 Operations&Maintenance ❑ Sewer Overflow
Records/Reports ® Self-Monitoring Program ❑ Sludge Handling/Disposal ❑ Pollution Prevention
®Facility Site Review ❑ Compliance Schedules ❑ Pretreatment Program ❑ Multimedia
®Effluent/Receiving Waters ® Laboratory ❑ Stormwater D Other:
Section D: Summary of Findings/Comments
See Attached Sheet(s)for Summary
Toxicity test results will be forwarded under separate cover when available.
Signature(s)of.Inspector(s): Agency/Office/Telephone: Date:
John Lesle DENR-DWQ/MRO/[phone] FAX: [phone] July 17,2006
Signature of Reviewer: Agency/Office Date:
•
Regulatory Office Use Only
Action Taken Date:
Noncompliance
Compliance
EPA Form 3560-3 (Revised 3-85)Previous Editions are Obsolete

Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 2
Permit:
The permit contains the following outfalls:
Outfall 001 Discharge of once through non-contact cooling water
Outfall 002 An ash pond discharge consisting of septic tank/sand filter effluent,
groundwater remediation system effluent, coal yard drainage, boiler room
drainage, turbine room drainage, and stormwater runoff
Outfall 002A Coal yard sump overflow
Outfall 002B Power house sump overflows
Outfall 003 Discharge of miscellaneous non-contact cooling waters
Outfall 004 Discharge of miscellaneous non-contact cooling water, vehicle wash water
(water only), intake screen backwash, and intake filter backwash
Facility Site Review/Operations and Maintenance:
Operation and maintenance of the facility are commendable. A designated Operator-in-
Responsible Charge (ORC) and several backup ORCs staff the facility. The designated ORC
and backup ORCs have WWTP Operator Grade II Certification and Physical/Chemical I
Certification.
Outfall 001:
The condenser cooling water is conveyed to the discharge canal that flows to the South
Fork Catawba River.
Outfall 002:
Treatment in the ash basin a treatment system for the removal of selenium consisting of
Ferric sulfate addition, and pH adjustment using either caustic or sulfuric acid. The ash basin
appeared to be well maintained. The ash basin discharges to the Catawba River.
Outfall 002A and 002B:
No overflows occurred in the previous 12-month period. Discharges to the Catawba
River.

Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 3
Outfall 003:
Discharges to the discharge canal (South Fork Catawba River).
Outfall 004:
Discharges to the Catawba River.
All outfalls appeared to be well maintained and were readily accessible. No adverse
impacts to the receiving waters were observed.
Records and Reports:
The facility maintains records consisting of ORC and maintenance logs, laboratory
analysis reports, chain of custody forms, calibration logs, and monthly monitoring reports. Flow
records are maintained in a computer database. All records were complete and up-to-date.
Laboratory:
The on-site lab is certified to conduct pH and temperature measurements (Certificate No.
5134). Temperature is measured by means of a thermocouple on the condenser cooling water
discharge that is calibrated twice annually using an NIST certified thermometer. Toxicity testing
is performed by Environmental Testing Solutions. Duke Energy Analytical Laboratory conducts
other analyses.
Self-Monitoring Program:
Monthly monitoring reports were reviewed for the period July 2005 through June 2006.
No violations were reported during the period. All samples are collected and maintained on ice.
A comprehensive chain of custody procedure is followed in the collection and shipment of
samples.
Flow Measurement:
Flow is measured by means of calculating the rate of flow from pump curve at outfall
001. A staff gauge is used to measure flow at Outfall 002 (ash basin discharge).

Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 4
Effluent/Receiving Waters:
None of the discharges appeared to have an adverse impact on the receiving waters.
Samples were collected at outfall 002 (ash basin) for use in a chronic Ceriodaphnia dubia
pass/fail toxicity test. Toxicity test results will be forwarded under separate cover when
available.

DIVISION OF WATER QUALITY
November 14, 2006
Memo To: Anita Reed, E.I., Project Review Engineer
Construction Grants and Loans Section
From: Michael Parker- v
Subject: Duke Energy Corporation
Authorization to Construct
NPDES Permit No.NC0004979
Gaston County
As requested by the memo received in this Office on September 20, 2006 from Ms. Anita
Reed, E.I., Construction Grants and Loans, this Office has reviewed the subject Authorization to
Construct request submitted by Duke Energy Corporation(DEC) and offers the following
comments and/or recommendations.
DEC has requested authorization to construct a new 0.7 MGD Flue•Gas Desulphurization
Wastewater Treatment System (FGDWWTS) at the subject facility. This WWT system has been
designed to treat the purged steam from the flue gas scrubber so that the wastewater can be
discharged to the facility's existing ash basin. The proposed WWT system has been designed to
effect the precipitation of heavy metals, remove and dewater solids, and reduce selenium
concentrations in the effluent.
The proposed treatment components consist of the following:
• An equalization tank with a bridge mounted agitator.
• Three reaction tanks. Tank No. 1 has pH adjustment, a sulfide reagent is added to Tank
No. 2 to form heavy metal complexes and enhance heavy metal removal. Ferric Chloride
is added to Tank No. 3 to improve floc settling characteristics.
• Overflow from Tank No. 3 is sent to a flow splitter box where polymer is added to aid in
the settling process.
• Two parallel clarifiers with solids return to Tank No. 1. Settled solids are conveyed from
the clarifiers to a sludge holding tank.
• Solids sent to the sludge holding tank are dewatered by three filter presses. Dewatered
cake from the filter presses is disposed of by land filling.

Page Two
• Effluent from the clarifiers flows to three (3)parallel continuous backwash filters for
removal of fine solids and metal sulfide complexes. Effluent from the filters flows to a
selenium reduction system for further processing.
• In the first stage of the selenium reduction process, thermal reduction of the wastewater is
necessary. This is accomplished by directing the effluent through two (2)plate and frame
heat exchangers. From there, the wastewater is discharged into the top of six (6) first
stage bio-reactor cells and then conveyed through six (6) second stage bio-reactor cells.
Nutrients are added to the influent of the first and second stage bio-reactors to promote
cell growth. A lime silo system will be available to provide a lime slurry for pH
adjustment/gypsum desaturation in reaction tank No. 1. Effluent from the second stage
recycle tank is sent to the effluent tanks where it is eventually pumped to the existing ash
basins.
This Office has no objections to the approval of DEC's request pending final technical
review and approval by the Construction Grants and Loans Section.
If you have any questions, please advise.
/mlp
h:\atc\atc06\allen.atc

rJAT
1? Michael F.Easley,Governor
^ / William G.Ross Jr.,Secretary
r
1V North Carolina Department of Environment and Natural Resources
do(
0 < Alan W.Klimek,P.E.Director
`J Division of Water Quality
September 18, 2006
MEMORANDUM AF`
TO: Rex Gleason, Regional Water Quality Supervisor •
Mooresville Regional Office, Division of Water Quality
SEP 2 0 200c,
FROM: . Anita Reed, E.I., Project Review Engineer
Design Management Unit
SUBJECT: Request for an Authorization to Construct %AIA T QUALITY S�Gt`,'A'
Allen Steam Station iLii'
NPDES Permit No. NC0004979
Plans, specifications and supporting documents have been received for the subject
project. It is requested that comments and recommendations, including the items listed below,
be received by October 18, 2006 from the Regional Office Staff:
Procedure No. 4 Comments
Schedule for Issuance of the NPDES Permit
SOC, or Other Schedules Which Must be Met
Status of Stormwater Permit, if applicable
Confirm if the Proposed Method and Sequence for Construction of
Additions/New Facilities is Acceptable.
Groundwater Comments
Standby Power Needs
Compliance With N.C. Well Construction Standards
CAMA
X Recommendations for inclusion in the Authorization to Construct
For your reference, review and comments on the above items,plan documents are submitted as follows:
X Plans and Specifications
Subsurface/Soils Report
Power Outage Information
Other
If you have any questions, please do not hesitate to contact me at(919) 715-6217.
Attachment
AR
cc: ATC Files
Anita Reed, E.I.
Construction Grants and Loans Section One
1633 Mail Service Center Raleigh NC 27699-1633 O Carolina
Phone:[phone]/FAX:[phone]/Internet:www.nc cgl.net
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper aturaI/I

rPlihDuke Duke Energy Corporation
nergye 526 South Church St.
Charlotte, NC 28202
Mailing Address:
PO Box 1006
September 14, 2006 Charlotte, NC 28201-1006
Cr
Mr. Cecil Madden,P.E. AND NA"`' `
T!l;-.; � .
North Carolina Department of Environment and Natural Resources 111100RESV':
Construction, Grants and Loans Section r
1633 Mail Service Center
Raleigh,North Carolina 27699-1633
SEP 2 0 200/,
Subject: Allen Steam Station
Flue Gas Desulfurization
Wastewater Treatment System
Gaston County WATER Q �r
Dear Mr. Madden: 4�
Duke Energy Corporation requests Authorization to Construct (ATC)the attached wastewater
treatment system (WWTS) at Allen Steam Station. This specific WWTS system is primarily a
Siemens (US Filter)design to treat the wastewater generated from the future Flue Gas
Desulfurization (FGD) system. Additionally, the Shaw drawings for the piping from this system
to the ash basin wastewater treatment system are included in this submittal.
This submittal includes three sets of drawings, specifications and documents associated with the
WWTS design. Included in the notebook is a list that identifies all of the enclosed drawings and
documents. As previously discussed with Mr. Ken Pohlig,the design is similar to the Belews
Creek WWTS design approved by your office earlier this year.
The attention that your office is giving to Duke Energy Corporation's FGD projects is very much
appreciated. In order to maintain the schedule for the Allen Steam Station FGD project it is
requested that approval be received by December 15, 2006. Duke Energy representatives are
willing to meet with you at your earliest convenience to discuss this project. If you have
questions or need additional information please contact me at [phone].
Sincerely,
W,94%
Robert Wylie, Engineer
Water Management
Attachments tREErtiED
cc (letter only):
Raymond Luciana, P.E., US Filter Corporation $F?
Zeb Morgan, PENTA Engineering
www.duke-energy.com

Fr*.
Allen Steam Station
'Ener w 253 Plant Allen Road
Belmont N.C. 28012
704 829-2448
704 829-2370 Fax
November 8, 2006
NOV 0 9 200.
Mr. John Lesley
Mooresville Regional Office
North Carolina Department of Environment and Natural Resources
610 East Center Avenue, Suite 301 "'
Mooresville,NC 28115 WATT • ,.,
Subject: Duke Energy Carolinas, LLC
Plant Allen
NPDES Permit Number NC0004979
Dear Mr. Lesley:
With reference to Part II, Section E.6, of the subject NPDES permit, this letter is a 5 day written
notification associated with the verbal notification made to your office on November 6, 2006 at 9:50
am. On the evening of November 5, 2006, a leak was discovered in"A" ash line which ultimately
led to approximately 20,000 gallons of ash sluice water being discharged to the Catawba River via
NPDES Outfall 004. The line was immediately isolated and repairs were completed. Additional
notifications were made to the news media as required by N.C. Gen. Stat. 143-215.1 C. No adverse
impact to the environment was observed.
If additional information is requested please contact Don Scruggs at(704) 829-2423.
Sincerely,
Stephen J. Immel
Station Manager
www.duke-energy.corn

bc: Robert Wylie- EC13K
Pat McCabe- EC13K
Penny Stafford- EC13K
Allen Stowe- EC13K
Steve Immel-Plant Allen
Don Scruggs- Plant Allen
Record Number: 404.060.01 (Plant Allen)
CERTIFIED MAIL: 7099 3400 0012 0549 1723

pF W Ar$9
Form WWfP-BYPASS/UPSET eA�► Treatment Plant(WTP)Bypass/Upset Reporting Form 5 Day Report
8 =� �' ic PART
This form shall be submitted to the appropriate DWQ Regional Office within five days of the first knowledge of the unanticipated
bypass or upset.
Permit Number: NC0004979 (Always use treatment plant permit number)
Facility: Plant Allen Steam Station Incident# 200603637
Owner. Duke Energy Carolinas LLC Region: Mooresville
City: Belmont County: Gaston
SPECIFIC location of the treatment units bypassed or where the upset occurred in the facMity:
Since line rupture
Was the WWTP compliant with permit requirements? ❑Yes ❑ No i Unknown
Was samples be taken during bypass?: ❑Yes Q No Unknown
Incident Started Dt: 11/05/06 Time: 06:15 PM Incident End Dt: Time:
(mm-dd-yyyy) hh:mm AM/PM (mm-dd-yyyy) hh:mm AM/PM
Estimated volume of the Bypass/Upset: 20000 gallons
Describe how the volume was determined:
Weather conditions during bypass/upset event:
Did Bypass/Upset reach surface waters?IP Yes n No❑ Unknown Volume reached surface waters(gallons): 10000
Surface water name: I--1
Did the bypass/upset result in a fish kill? Ekes UNo DUnknown If Yes,estimated number of fish killed? 0
SPECIFIC cause(s)of the Bypass/Upset:
. Other(Please explain in Part II)
WWTP-Bypass/Upset Form February 10,2014 02:07 PM Page 1

Form WWTP-BYPASS/UPSET
Treatment Plant(WWTP)Bypass/Upset Reporting Form 5 Day Report
PART I I
ANSWER THE FOLLOWING QUESTIONS FOR EACH RELATED CAUSE CHECKED IN PART I OF THIS FORM AND
INCLUDE THE APPROPRIATE DOCUMENTATION AS REQUIRED OR DESIRED
COMPLETE ONLY THOSE SECTIONS PERTAINING TO THE CAUSE OF THE INCIDENT AS CHECKED IN PART I
(In the check boxes below,NA=Not Applicable and NE=Not Evaluated)
A HARDCOPY OF THIS FORM SHOULD BE SUBMITTED TO THE APPROPRIATE DWQ REGIONAL OFFICE
UNLESS IT HAS BEEN SUBMITTED ELECTRONICALLY THROUGH THE ONLINE REPORTING SYSTEM
Other(Please explain in Part II)
Describe:
Were adequate equipment and resources available to fix the problem? fJ Yes n No ❑NA El NE
If Yes,explain:
If the problem could not be immediately repaired,what actions were taken to lessen the impact of
the SSO?
Comments:
As a representative for the responsible party,I certify that the information contained in this report is true and accurate to
the best of myknowledge
Person submitting claim:
Signature: Title
Telephone Number:
Any additional information desired to be submitted should be sent to the appropriate Division Regional Office within
five days of first knowledge of the Bypass with reference to the incident number(the incident number is only generated
when electronic entry of this form is completed,if used).
WWTP-Bypass/Upset Form February 10,2014 02:07 PM Page 2

Pr . .
Collection System SSO 24-Hour Notification
Required Information
,
Incident No. Lt5(7(D p-3 i 57
Incident Reviewed (Date):
Incident Action Taken: BPJ
NOV
Spill Date ) 1- ,S-h(F Time to : i c. am
Reported Date 1 1 -) - I?( Time D 5 SO ` pm
Reported To (SWP Staff) J - I,e f
Reported By eDDAJ SC_f i,19 S Phone 7P1-1-,RZ5-ZSZ
Address of Spill Al \-P14 . 9-toirfr t ,,v
L-iii-,
County GAS City (Spill Location) I -)'"'4'
Collection System: SSO WWTP Spill: Bypass
WQCSOO NPDES NC000447q
Map Location WWTP
Cause of Spill62114itv... P *t- ('ui'
Estimated Gallons IV b d Gal to Surface Waters //2,?
Stream CaNIA t r4 Fish Kill: 9Yes, How many?
Comments p D ) 14G,.4,-"±—Itw f,--1-'C,-)7794.7" '" : 0:f " %':
1 )2‘ 55 '`-' (, 1/\ roe 61-2,wil-e.-
4,

r0oc.
WATF9P Michael F.Easley,Governor
G William G.Ross Jr.,Secretary
rNorth Carolina Department of Environment and Natural Resources
-i
RECEIVE
l
J A N 2 4 7008
December 15, 2006
Mr. Robert Wylie NC DENR MRO
Duke Power DW�1-Surface Water Protection
South Church Street
Charlotte, NC 28202
SUBJECT: Authorization to Construct No. 004979A02
Allen Steam Station
Flue Gas Desulfurization Wastewater Treatment System
Gaston County
Dear Mr. Wylie:
A letter of request for Authorization to Construct was received September 18, 2006, 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 the Flue Gas
Desulfurization (FGD) Wastewater Treatment System. Upon completion of the construction of
the FGD Wastewater Treatment System, the treated effluent from the FGD Wastewater
Treatment System (Internal Outfall 005) will discharge into the Ash Settling Basin (Internal
Outfall 002),which discharges to Catawba River(Outfall 003) in the Catawba River Basin.
This authorization results in a design and permitted capacity of 0.864 MGD, and is
awarded for the construction of the following specific modifications:
Installation of a 0.577 MGD Flue Gas Desulfurization (FGD) Wastewater Treatment
Plant, consisting of a 177,120 gallon maintenance tank; a 177,120 gallon equalization
tank; dual 640 gpm forwarding pumps; reaction tank#1 (44,280 gallons) for the addition
of lime (to raise the pH to 9.2), including a lime slurry feed system consisting of a 8,000
ft3 lime silo, a 700 gallon lime slurry tank, and dual 70 gpm lime slurry feed pumps;
reaction tank#2 (9,580 gallons) for the addition of sulfide, including a sulfide feed
system consisting of dual 400 gallon tanks and dual 8 gph feed pumps; reaction tank#3
(9,480 gallons) for the addition of ferric chloride, including a ferric chloride feed system
consisting of a 7,190 gallon tank and dual 8 gph feed pumps; a flow splitter box;
injection of polymer(just prior to the clarifiers)and a polymer feed system consisting of
dual 400 gallon tanks and dual 0.4 gph feed pumps; two 40-foot diameter, 28-foot side-
water depth clarifiers; a static mixer for the addition of hydrochloric acid(to lower the
pH to 8.0); a hydrochloric acid feed system consisting of a 7,190 gallon storage tank and
dual 8 gph feed pumps; three continuous backwashing, 8.33-foot diameter gravity sand
filters; a 7,140 gallon storage tank (selenium reduction feed tank); dual 495 gpm bio-
reactor feed pumps; dual heat exchangers (to reduce the water temperature from 133° F to
95° F); a static mixer for the addition of a molasses based nutrient; a molasses based
One
NAthCarolina
tura!!y
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh,NC 27699-1617 Phone[phone] Customer Service
Internet:www.ncwaterquality.orq 512 N.Salisbury St. Raleigh,NC 27604 FAX [phone] 1-877-623-6748
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper

Mr. Robert Wylie
December 15, 2006
Page 2
nutrient feed system consisting of a 7,190 gallon storage tank and three 26 gph feed
pumps; first stage selenium reduction bio-reactor(converting Se(IV) and Se(VI) to
elemental selenium Se(0)) consisting of six (6)parallel 18'x 20'x 26'cells filled with 14.3
feet (depth) of activated carbon; dual 106,290 gallon first stage effluent transfer
compartments (tanks)with three (3)495 gpm transfer/recycle pumps and dual 3,600 gpm
backwash pumps; a second static mixer for the addition of a molasses based nutrient;
second stage selenium reduction bio-reactor(converting Se(IV) and Se(VI) to elemental
selenium Se(0)) consisting six (6) parallel 18'x 20'x 26'cells filled with 14.3 feet(depth)
of activated carbon; a 9,990 gallon second stage recycle tank with dual 495 gpm
recycle/recirculation pumps; dual 13,960 gallon effluent tanks and dual 1,200 gpm
effluent pumps; approximately 8,200 linear feet of 14-inch forcemain to the ash basin;
dual 99,770 gallon backwash holding compartments (tanks)with dual 70 gpm backwash
waste return pumps; a sludge treatment system consisting of six (clarifier) 125 gpm
sludge transfer pumps, a 177,120 gallon sludge holding tank, three 550 gpm filter press
fast fill pumps, six 70 gpm filter press pressurization pumps,three (3) 1.5 meter, 250 ft3
filter presses, three (3) sludge truck loading stations, and a 31,800 gallon filtrate sump
pump station with dual 600 gpm filtrate sump pumps; associated yard piping, access
roads and site work, in conformity with the project plan, specifications, and other
supporting data subsequently filed and approved by the Department of Environment and
Natural Resources.
This Authorization to Construct is issued in accordance with Part III, Paragraph A of
NPDES Permit No. NC0004979 issued September 11, 2006, and shall be subject to revocation
unless the wastewater treatment facilities are constructed in accordance with the conditions and
limitations specified in Permit No. NC0004979.
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 Water Quality.
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.
The Mooresville Regional Office, telephone number(704) 663-1699, shall be notified at
least forty-eight(48) hours in advance of operation of the installed facilities so that an on site
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 Cecil G. Madden, Jr., P.E.,
Construction Grants & Loans, DWQ /DENR, 1633 Mail Service Center, Raleigh, NC 27699-
1633.

Mr. Robert Wylie
December 15, 2006
Page 3
Upon classification of the wastewater treatment facilities by the Water Pollution Control
System Operators Certification Commission (WPCSOCC), the Permittee shall designate and
employ a certified operator to be in responsible charge (ORC) and one or more certified
operator(s) to be back-up ORC(s) of the facilities in accordance with 15A NCAC 8G .0201. The
ORC shall visit the facilities in accordance with 15A NCAC 8G .0204 or as specified in this
permit and shall comply with all other conditions specified in these rules.
A copy of the approved plans and specifications shall be maintained on file by the
Permittee for the life of the facility.
During the construction of the proposed additions/modifications, the permittee shall
continue to properly maintain and operate the existing wastewater treatment facilities at all times,
and in such a manner, as necessary to comply with the effluent limits specified in the NPDES
Permit.
You are reminded that it is mandatory for the project to be constructed in accordance
with the North Carolina Sedimentation Pollution Control Act, and, when applicable, the North
Carolina Dam Safety Act. In addition, the specifications must clearly state what the contractor's
responsibilities shall be in complying with these Acts.
Prior to entering into any contract(s) for construction, the recipient must have obtained all
applicable permits from the State.
Failure to abide by the requirements contained in this Authorization to Construct may
subject the Permittee to an enforcement action by the Division of Water Quality 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.

Mr. Robert Wylie
December 15, 2006
Page 4
One (1) set of approved plans and specifications is being forwarded to you. If you have
any questions or need additional information, please contact Cecil G. Madden,Jr., P.E. at
telephone number(919) 715-6203.
Sincerel ,
4..
Alan W. Klimek, P k
.
•
kp:cgm
cc: Raymond Luciana, P.E., US Filter, Warrendale, PA
Gaston County Health Department
DWQ Mooresville Regional Office, Surface Water Protection
Technical Assistance and Certification Unit
Daniel Blaisdell, P.E.
Point Source Branch, NPDES Program
Cecil G. Madden,Jr., P.E.
Ken Pohlig, P.E.
ATC File

Duke Power, Allen Steam Station
A To C No. 004979A02
Issued December 15, 2006
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 modifications and improvements to the Allen Steam Station, Flue Gas
Desulfurization WWTP, located on 253 Plant Allen Road (NCST 2525), Belmont, in Gaston
County, hereby state that, to the best of my abilities, due care and diligence was used in the
observation of the following construction:
Installation of a 0.577 MGD Flue Gas Desulfurization (FGD) Wastewater Treatment
Plant, consisting of a 177,120 gallon maintenance tank; a 177,120 gallon equalization
tank; dual 640 gpm forwarding pumps; reaction tank#1 (44,280 gallons) for the addition
of lime (to raise the pH to 9.2), including a lime slurry feed system consisting of a 8,000
ft3 lime silo, a 700 gallon lime slurry tank, and dual 70 gpm lime slurry feed pumps;
reaction tank#2 (9,580 gallons) for the addition of sulfide, including a sulfide feed
system consisting of dual 400 gallon tanks and dual 8 gph feed pumps; reaction tank#3
(9,480 gallons) for the addition of ferric chloride, including a ferric chloride feed system
consisting of a 7,190 gallon tank and dual 8 gph feed pumps; a flow splitter box;
injection of polymer(just prior to the clarifiers) and a polymer feed system consisting of
dual 400 gallon tanks and dual 0.4 gph feed pumps; two 40-foot diameter, 28-foot side-
water depth clarifiers; a static mixer for the addition of hydrochloric acid (to lower the
pH to 8.0); a hydrochloric acid feed system consisting of a 7,190 gallon storage tank and
dual 8 gph feed pumps; three continuous backwashing, 8.33-foot diameter gravity sand
filters; a 7,140 gallon storage tank (selenium reduction feed tank); dual 495 gpm bio-
reactor feed pumps; dual heat exchangers (to reduce the water temperature from 133° F to
95° F); a static mixer for the addition of a molasses based nutrient; a molasses based
nutrient feed system consisting of a 7,190 gallon storage tank and three 26 gph feed
pumps; first stage selenium reduction bio-reactor(converting Se(IV) and Se(VI) to
elemental selenium Se(0)) consisting of six (6) parallel 18'x 20'x 26'cells filled with 14.3
feet (depth) of activated carbon; dual 106,290 gallon first stage effluent transfer
compartments (tanks) with three (3)495 gpm transfer/recycle pumps and dual 3,600 gpm
backwash pumps; a second static mixer for the addition of a molasses based nutrient;
second stage selenium reduction bio-reactor(converting Se(IV) and Se(VI) to elemental
selenium Se(0)) consisting six (6) parallel 18'x 20'x 26'cells filled with 14.3 feet(depth)
of activated carbon; a 9,990 gallon second stage recycle tank with dual 495 gpm
recycle/recirculation pumps; dual 13,960 gallon effluent tanks and dual 1,200 gpm
effluent pumps; approximately 8,200 linear feet of 14-inch forcemain to the ash basin;
dual 99,770 gallon backwash holding compartments (tanks)with dual 70 gpm backwash
waste return pumps; a sludge treatment system consisting of six (clarifier) 125 gpm
sludge transfer pumps, a 177,120 gallon sludge holding tank, three 550 gpm filter press
fast fill pumps, six 70 gpm filter press pressurization pumps, three (3) 1.5 meter, 250 ft3
filter presses, three (3) sludge truck loading stations, and a 31,800 gallon filtrate sump
pump station with dual 600 gpm filtrate sump pumps; associated yard piping, access
roads and site work, in conformity with the project plan, specifications, and other
supporting data subsequently filed and approved by the Department of Environment and
Natural Resources.

Duke Power, Allen Steam Station
A To C No. 004979A02
Issued December 15, 2006
Engineer's Certification - continued
I certify that the construction of the above referenced project was observed to be built within
substantial compliance and intent of the approved plans and specifications.
We understand that the monitoring requirements associated with NPDES Permit NC0004979
Internal Outfall 005 now apply.
Signature Registration No.
Date
Send to: Construction Grants & Loans
Attn: Cecil G. Madden, Jr., P.E.
DENR/DWQ
1633 Mail Service Center
Raleigh, NC 27699-1633

0F W A 7. 19 Michael F.Easley,Govemor
,0 G William G.Ross Jr.,Secretary
North Carolina Department of Environment and Natural Resources
p Alan W.Klimek,P.E.Director
Division of Water Quality
December 15, 2006
5134
Mr. David Greene
Duke Power company LLC d/b/a Duke Energy Carolinas, LLC -Allen
MGO3A2 DEC 1 9 200,
Hagers Ferry Rd.
Huntersville, NC 28078-
SUBJECT: Wastewater/Groundwater Laboratory Certification Renewal tie :, ' 111
Field Parameters Only
Dear Mr. Greene:
The Department of Environment and Natural Resources, in accordance with the
provisions of NC GS 143-215-.3 (a) (10), 15 NCAC 2H .0800, is pleased to renew
certification for your laboratory to perform specified environmental analyses required by
EMC monitoring and reporting regulations 15 NCAC 2B .0500, 2H .0900 and 2L .0100,
.0200,..0300, and 2N .0100 through .0800.
Enclosed for your use is a certificate describing the requirements and limits of your
certification. Please review this certificate to insure that your laboratory is certified for all
parameters required to properly meet your certification needs.
Please contact us at 919-733-3908 if you have questions or need additional
information.
Sincerely,
/ -/z-,-/ftl,.1/
4-7
Pat Donnelly
Branch Manager
Enclosure
cc: Chet Whiting
Mooresville Regional Office
None hCarolina
/atiirally
Laboratory Section 1623 Mail Service Center Raleigh,NC 27699-1623 Phone[phone] Customer Service
Internet: ...%w.d..olab.ur� Location:4405 Reedy Creek Road Raleigh,NC 27607 Fax [phone]
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper

STATE OF NORTH CAROLINA DEPARTMENT OF THE
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
LABORATORY CERTIFICATION PROGRAM
In accordance with the provisions of N.C.G.S. 143-215.3(a)(1), 143-215.3(a)(10)and NCAC 2H.0800:
Field Parameter Only
,a!�c. StArt .
/,PIA
_M^/O rn5
. 1-,-1v I7. I;
`SS£ QLlAM V1Dtig iG
\ _ :1,
DUKE POWER COMPANY LLC D/B/A DUKE ENERGY CAROLINAS, LLC - ALLEN
Is hereby certified to perform environmental analysis as listed on Attachment I and report monitoring data to DWQ for
compliance with NPDES effluent, surface water,groundwater, and pretreatment regulations.
By reference 15A NCAC 2H.0800 is made a part of this certificate.
This certificate does not guarantee validity of data generated,but indicates the methodology,equipment, quality control procedures,
records, and proficiency of the laboratory have been examined and found to be acceptable.
This certificate shall be valid until December 31, 2007
Certificate No. 5134
AT--- k..-- /,=-1,-*---(5/
Pat Donnelly

Attachment
North Carolina Wastewater/Groundwater Laboratory Certification
Certified Parameters Listing
FIELD PARAMETERS ONLY
Lab Name: Duke Power company LLC d/b/a Duke Energy Certificate Number: 5134
Address: MGO3A2 Effective Date: 01/01/2007
Hagers Ferry Rd. Expiration Date: 12/31/2007
Huntersville,NC 28078-
Date of Last Amendment:
The above named laboratory,having duly met the requirements of 15A NCAC 2H.0800,is hereby certified for the measurement of the parameters listed below.
CERTIFIED PARAMETERS
INORGANICS
DH
Std Method 4500 H B
TEMPERATURE
Std Method 2550E
his certification requires maintance of an acceptable quality assurance program,use of approved methodology,and satisfactory performance on evaluation samples. Laboratories are
ubject to civil penalties and/or decertification for infractions as set forth in 15A NCAC 2H.0807.

W A T
�OF FRQ Michael F.Easley.Governor
vYt RD
0 0 William G.Ross Jr..Secretary
Carolina Department of Environment and Natural Resources
Alan W.Klimek,P.E.Director
Division of Water Quality
September 18, 2006 SEP 2 0
W:ns.or-Sve '
Mr. Robert Wylie
Duke Power
526 South Church Street V /
Charlotte, NC 28202
SUBJECT: Acknowledgement of Request for an
Authorization to Construct
Allen Steam Station
Flue Gas Desulfurization
Wastewater Treatment System
NPDES Permit No. NC0004979
Dear Mr. Wylie:
The Construction Grants and Loans Section received your request for an Authorization to
Construct and the supporting documentation on September 18, 2006. We will notify you and
your engineer upon completion of our review. Your project has been assigned to Ken Pohlig. He
can be reached at [phone].
If you have any questions concerning this matter, please contact me at [phone].
Sincerely
___,q()A
Cecil . Madden, J ., P. ., yip sor
Construction Grants and Loans ection
Design Management Unit /
Jcr r.01-04V1 i..1.
AND NATURAL RESOURCES.
AR/dr MOORES``:=t rt' ^lONALOFFICE
cc:
WQ Central Files
Anita Reed, E.I. SEP 2 2 200c
ATC Files
WATER QUALITY SECTION
Construction Grants and Loans Section One
1633 Mail Service Center Raleigh NC 27699-1633 N I _l. oV
Phone:[phone]/FAX:[phone]/Internet:www.nccgl.net
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper Naturally

A T&-9 Michael F.Easley,Governor
ppr
p� William G.Ross Jr.,Secretary
1_ North Carolina Department of Environment and Natural Resources
--I
Alan W.Klimek,P.E.Director
AND NATURAL RC30eR g
September 18, 2006 MOORESV:1 'iebtah tO�!AL OFFICE
r
Stephen Immel
Allen Steam Station
243 Plant Allen Rd. SEP 2 C 200<,
Belmont,NC 28012
Subject: Notice of Incomplete Discharge Monitoring Report NC0004979
•
Dear Permittee: . .
The purpose of this letter is to call your attention to problems with the recent submittal of the Discharge
Monitoring Report(DMR)from your facility. As you may know,the data recorded on your DMR is keyed
into the Division's database. Our data entry staff has informed me of problems with your recent DMR
submittal. Until these problems have been corrected,your DMR will be considered incomplete. Please
see the attached form along with a copy of the problem DMR for details regarding the DMR's deficiency.
Incomplete or illegible DMRs affect our staffs ability to provide a timely and effective evaluation of DMR
submittals. Please be aware that until the Division receives a corrected DMR,you may be considered
noncompliant with your NPDES permit and 15A NCAC 02B .0506, and you may be subject to further
enforcement action. Please take the necessary steps to correct the problems and submit two copies of the
amended DMR within fifteen(15)days of the date of this letter to the following address:
Attention: Michele Phillips
Division of Water Quality
Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
Future DMR submittals with the same or similar problems will be unacceptable. If you have any questions
about the proper completion of DMRs,please contact Michele Phillips at 919-733-5083 Ext. 534. Thank
you for your assistance in this matter.
Sincerely,
Michele Phillips
cc:
Central Files
Nam` Carolina
turalr;
N.C.Division of Water Quality 1617 Mail Service Center Raleigh,North Carolina 27699-1617 Phone: [phone] Customer Service
Internet httpJ/h2o.enr.state.nc.us 512 N.Salisbury St. Raleigh,NC 27604 Fax: [phone] 1-877-623-6748
An Equal Opportunity/Affirmative Action Employer

°\0 Notice of Incomplete Discharge Monitoring Report
Permit Number: N C a DO 44
Facility: 4tten Stem ,-
County: CaA
DMR Month and Year: (g-bD
The Division of Water Quality deems the aforementioned DMR as incomplete due to the
following reason(s): (Please see the highlighted areas on the attached DMR for
details.)
❑ The written values are illegible.
•
❑ The Average,Maximum, and/or the Minimum data points have been omitted.
❑ The Units of Measure have been omitted or are incorrect.
❑ The DMR Parameter Codes have been omitted.
2 Other:
1-4 Cu n Asa4--.t e-De-le a- -ba ri uM , l bk.( W-era 1-e
1
�i�Gh�rge Dog- .4,P61 hz_ 0 iOD'7.
y®u.r J A7(Uv, .

EFFLUENT
'DES PERMIT NO. NC0004979 DISCHARGE NO. 002 MONTH July YEAR 2006
%CILITY NAME Men Steam Station CLASS I • COUNTY Gaston
PERATOR IN RESPONSIBLE CHARGE(ORC) Don Scruggs GRADE I PHONE [phone]
"'ERTIFIED LABORATORIES (1) Duke Power Env.Services-248 (2)
HECK BOX IF ORC HAS CHANGED ID PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL and ONE COPY 5.
NCDENR I DIVISION OF WATER OUALRY ( �j���
WATER OUALIT'SECTION X J� 1
ATTENTION:CENTRAL NILES (((AAAA
1617 MAIL SERVICE CENTEP. URE OF OPERATOR IN RESPONSIBLE CHAR DATE
RALEIGH,NC 27699•1677 By this signature,I certify that this report is accurate and complete to the best of my knowledge.
Q�UY2 W 50y5 31616 00310 00605 01000 01067 00720 01002 01027
IX -W is FLOW Erg 8 o L O
<U O 07 EFF X 1 ,po S '62 u �•
w ,g .Z O INF Cu4 O i -I i Z 3 j
o �� m 0 ,_.riti. a m . A r U ~ O
O~ O¢ 1` <
HRS HRS YM MGD 01100m1 mg/I mgh ugh ugh mg/I ugh ugh
0700 9 B
2 0700 9 B i
34 0700 ,- 9 Y
4 0700 9 B
5 0700. _: 9 Y •6 0700 9 Y <2 <1.7 83.48 , 288.0 28.0 <0.0020 41.0 1.10
7 0700 1 9 Y i
8 N
9I N .
to, 0700 9 Y
1 t 0700 ....9.. Y• .. _ - I
12 0700 9 Y
13 0700 9 Y
14 0700 9 Y
15 0700 I:, 9 g
16 0700 9 B
17 0700 9:: Y
18 0700 9 Y
20 0700 9 Y ,
21 0700 9 Y_ I ri
22 0700 9 B 1
23 `0700 9, B
24 0700 9 B ,
25 0700 : 9 B .
26 0700 9 B
27 :0700 9 B . -
28 0700 9 B 1 •
30 0700 9 B
,
31 0700. -.,. 9 Y-
veraoe 1.0 0.0 83.48 288.00 28.0 0 41.0 1.10
Maximum <2 <1.7 83.48 288.0 28.0 <0.0020 41.0 • 1.10
Minimum <2 <1.7 83.48 288.0 28.0 <0.0020 41.0 1.10
pomp.(C)/Grab(G)
vfonthly Limit - -
:aality Status:(Please check one of the following) DEM Form MR-1(8.'94
All monitoring data and sampling frequencies meet permit requirements I X I Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements I I Noncompliant See Attachment
"I certify,under penalty of law,that this document and all attachments were prepared under my direction or supervision in accordance with a system oesigned to assure that qualified
personnel properly gatner 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
.nfnT.elinn ,riff,.iinn�I,e nr.�eil,ilih.of Fn�e anA in,nn�Mmen1 fn.Lnn,.nnn,nnlatinne � kS _O•�^
Permittee(Please print or type) . Signature of Parmittee" Date
243 Plant Allen Rd.Belmont.NC 28012 704-829-2400 5/31/2005 •
Permittee Address Phone Number Permit Exp.Date
'ORC must visit facility and document visitation of facility as required per 15A NCAC 8A.0202(b)(5)(B).
'if signed by other than the pennittee,delegation of signatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(D).
-Multiple Systems Operating
The monthly average for fecal coliform is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facilitys permit for reporting data.

WATF� Michael F.Easley,Governor
0 State of North Carolina
l�qy William G.Ross,Jr.,Secretary
0 . © _/`r () Department of Environment and Natural Resources
y ` J Alan W. Ic?P.E.,Director
Division of Water Quality
July 5,2006
Mr.Michael Ruhe J U L I.
Duke Energy Corporation
P.O.Box 1006
Mail Code EC11E
Charlotte,North Carolina 28201 s A
Subject: Dia1NPDES
Permit NC0004979
Allen Steam Station
Gaston County
Dear Mr.Ruhe:
Enclosed with this letter is a copy of the draft permit for your facility.Please review the draft very
carefully to ensure thorough understanding of the conditions and requirements it contains.
This draft permit contains the following significant changes to the draft you received dated September
28,2005.
➢ Language has been added allowing the discharge of wastes from a Flue Gas Desulfurization System
(FGD),upon receipt of an engineer's certification,and a Dry Ash Handling system.
➢ Monitoring requirements have been added at internal outfall 005(treated FGD wet scrubber
wastewater to ash settling basin).
➢ The arsenic limit has been removed based on revised average streamflow estimates submitted by
Duke during the comment period. Based on this data,there is no reasonable potential for arsenic
levels to cause an exceedance of water quality standards.
➢ The 21 pg/L selenium limit will take effect 36 months after the effective date of the final permit.
Until that time,the facility will be subject to a limit of 31 pg/L.
➢ The stream class has been corrected. At the point of discharge,both the Catawba River and the South
Fork Catawba River are classified WS-V B.
Submit any comments to me no later than thirty days following your receipt of the draft.Comments
should be sent to the address listed at the bottom of this page. If no adverse comments are received from
the public or from you,this permit will likely be issued in two months.If you have any questions or
comments concerning this draft permit,contact me at(919)733-5083 x 551 or [e-mail].
Sincerely,
e C: ield(e9
Western NPDES Program
cc: e,Surfhte
PDES Unit
Aquatic Toxicology
Britt Setzer,Mooresville Regional Office—DEH
Marshall Hyatt,EPA Region IV
1617 Mail Service Center,Raleigh,North Carolina 27699-1617 Telephone[phone] FAX[phone] NofthCarolina
512 N.Salisbury Street,Raleigh,North Carolina 27604 On the Internet at http://h2o.enr.state.nc.us/ Aiaturagy
An Equal Opportunity/Affirmative Action Employer

r
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the 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 Energy Corporation
is hereby authorized to discharge wastewater from a facility located at the
Plant Allen Steam Station
253 Plant Allen Road (NCSR 2525)
Belmont
Gaston County
to receiving waters designated as the Catawba and South Fork Catawba Rivers in the
Catawba River Basin in accordance with effluent limitations, monitoring requirements, and
other conditions set forth in Parts I,II,III and IV hereof.
This permit shall become effective.
This permit and authorization to discharge shall expire at midnight on May 31,2010.
Signed this day.
DRAFT
Alan W.Klimek,P.E.Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0004979
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility,whether for operation or discharge are hereby revoked.As of
this permit issuance,any previously issued permit bearing this number is no longer effective.Therefore,the
exclusive authority to operate and discharge from this facility arises under the permit conditions,requirements,
terms,and provisions included herein.
Duke Energy Corporation is hereby authorized to:
1. Continue to discharge:
• Once through cooling water(outfall 001)
• Operate a septic tank and ash pond with pH adjustment and discharge domestic
wastewater,stormwater runoff, ash sluice,water treatment system wastewaters,FGD
system blowdown,and miscellaneous cleaning and maintenance wash waters(002).
• Coal yard sump overflow(002A) and power house sump overflow(002B)
• Miscellaneous equipment non-contact cooling and sealing water(003)
• Miscellaneous non-contact cooling water,vehicle washwater, and intake screen
backwash(004)
From a facility located at the Plant Allen Steam Station on Plant Allen Road(NCSR 2525),
south of Belmont in Gaston County,And
2. Without adding detergents or chemicals of any kind,discharge Asiatic clam/debris filter
backwash(of the intake filter screen) (see Part A.7);and
3. After receiving an Authorization to Construct from the Construction Grants and Loans
Section,construct and operate a FGD wet scrubber wastewater treatment system discharging
to the ash settling basin through internal outfall 005;and
4. Discharge from said treatment works at the location specified on the attached map into the
Catawba River(outfalls 002,002A,002B and 004) and the South Fork Catawba River(outfalls
001 and 003)which are classified Class WS-V B waters,respectively,in the Catawba River
Basin.
2

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Duke Energy Corporation Map not to scale
Allen Steam Station
State Grid/Quad: G14NE/Belmont Permitted Flow: Not limited
Receiving Streams: Catawba and South Fork Catawba Rivers
Stream Class: WS-V&B ° z '
Drainage Basin: Catawba River Basin Sub-Basin: 03-08-34 Facility
Latitude(001): 35°11'23" N Longitude(001): 81°00'45" Wr�
vt
may,..,;
Latitude(002): 35°10'30" N Longitude(002): 81°00'23" W Location
Latitude(002A): 35°11'34" N Longitude(002A): 81°00'22" W -
Latitude{002B): 35°11'36" N Longitude(002B): 81°00'30" W
Latitude(004): 35°11 35" N Longitude(004): 81°00'22" W NPDES Permit No. NC0004979
Latitude(A.Clam): 35°11'36" N Longitude(A.Clam):81°00'30" W North Gaston County

Permit NC0004979
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 001)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 001-Condenser Cooling Water(CCW). Such discharges shall be limited
and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum,; Frequency
Flow Daily Pump Logs Effluent
Temperature 38.9°C Daily Grab or Effluent
(June 1—September 30)1 (102°F) Instantaneous
Temperature 35°C Daily Grab or Effluent
(October 1—May 31)1 (95°F) Instantaneous
Notes:
1. 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.
Chlorination of the once through condenser cooling water,discharged through outfall 001,is not allowed
under this permit. Should Duke Power wish to chlorinate its condenser cooling water,a permit
modification must be requested and received prior to commencing chlorination.
3

Permit NC0004979
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 002-ash pond effluent. Such discharges shall be limited and monitored
by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Weekly Daily Measurement Sample Type Sample Location
Average, Average Maximum Frequency
Flow Weekly Instantaneous Influent or
or Estimate Effluent
Oil and Grease 15.0 mg/1 20.0 mg/1 Quarterly Grab Effluent
Total Suspended Solids 30.0 mg/1 100.0 mg/1 Monthly Grab Effluent
Total Copper2 1.0 mg/1 2/Month Grab Effluent
Total Iron 1.58 mg/1 Monthly Grab Effluent
Total Selenium2,3 31.0 pg/L 2/Month Grab Effluent
Total Selenium2,4 21.0}ig/L 2/Month Grab Effluent
Total Nitrogen Semi-annually Grab Effluent
(NO2+NO3+TICK)
Chronic Toxicity' Quarterly Grab Effluent
pH5 Monthly Grab Effluent
Notes:
1. Whole Effluent Toxicity shall be monitored by chronic toxicity(Ceriodaphnia)P/F at 24%. Tests shall be
conducted in January,April,July and October(see Part A.(9.)for details)
2. Total metals are defined by 40 CFR 136. Any method specified by 40 CFR 136 is considered acceptable for
analysis.
3. Selenium limit shall take effect beginning on the effective date of the final permit and lasting for 36 months.
4. Selenium limit shall take effect 36 month after the effective date of the final permit.
5. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or foam visible in other than trace amounts.
4

Permit NC0004979
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002A)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 002A—Coal Yard Sump Overflows. Such discharges shall be limited and
monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS'
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow Episodic Estimate Effluent'
pH Episodic Grab Effluent
Oil and Grease2 15.0 mg/1 20.0 mg/1 Episodic Grab Effluent
Total Suspended Solids2 30.0 mg/1 100.0 mg/1 Episodic Grab Effluent
Fecal Coliform Episodic Grab Effluent
Total Iron3 1.0 mg/1 Episodic Grab Effluent
Notes:
1. Effluent sampling shall be conducted at a point upstream of discharge to the receiving stream.
2. Monthly average limits for total suspended solids and oil and grease only apply if the overflow occurs for
more than 24 hours.
3. Sampling for iron is required only when TSS is reported as greater than 100 mg/L.
There shall be no discharge of floating solids or foam visible in other than trace amounts
All flows shall be reported on monthly DMRs. Should no flow occur during a given month,the words"no
flow"should be clearly written on the front of the DMR. Episodic sampling is required per occurrance
when sump overflows occur for longer than one hour. All samples shall be of a representative discharge.
5

Permit NC0004979
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002B)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 002B—Power House Sump Overflows. Such discharges shall be limited
and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow Episodic Estimate Effluents
pH Episodic Grab Effluent
Oil and Grease2 15.0 mg/1 20.0 mg/1 Episodic Grab Effluent
Total Suspended Solids2 30.0 mg/1 100.0 mg/1 Episodic Grab Effluent
Total Copper3 1.0 mg/1 Episodic Grab Effluent
Total Iron3 1.0mg/1 Episodic Grab Effluent
Notes:
1. Effluent sampling shall be conducted at a point upstream of discharge to the receiving stream.
2. Monthly average limits for total suspended solids and oil and grease only apply if the overflow occurs for
more than 24 hours.
3. The limits for total copper and total iron only apply during a chemical metals cleaning.
There shall be no discharge of floating solids or visible foam in other than trace amounts
All flows shall be reported on monthly DMRs. Should no flow occur during a given month,the words"no
flow"should be clearly written on the front of the DMR. Episodic sampling is required per occurrance
when sump overflows occur for longer than one hour. All samples shall be of a representative discharge.
6

Permit NC0004979
A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 003)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 003—miscellaneous equipment non-contact water and sealing water.
Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow Weekly Estimate Effluent
Chlorination of the once through cooling water,discharged through outfall 003,is not allowed under this
permit. Should Duke Power wish to chlorinate its once through cooling water,a permit modification must
be requested and received prior to commencing chlorination.
A. (6.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 004)
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from outfall 004-miscellaneous non-contact cooling water,vehicle washwater,and
intake screen backwash. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency,
Flow Weekly Estimate Effluent
Oil and Grease 15.0 mg/1 20.0 mg/1 Quarterly Grab Effluent
•
Chlorination of the once through cooling water,discharged through outfall 004,is not allowed under this
permit. Should Duke Power wish to chlorinate its condenser cooling water,a permit modification must be
requested and received prior to commencing chlorination.
7

•
Permit NC0004979
A. (7.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Internal
Outfall 005)
During the period beginning upon submittal of an engineer's certification and lasting until permit expiration,
the Permittee is authorized to discharge from internal outfall 005-treated FGD wet scrubber wastewater to ash
settling basin. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Pump logs or
Flow Monitor&Report Monthly similar Effluent
readings
Total Suspended Solids Monitor&Report Weekly Grab Effluent
Carbonaceous Oxygen Demand Monitor&Report Weekly Grab Effluent
(COD)
Total Arsenic Monitor&Report Weekly Grab Effluent
Total Cadmium Monitor&Report Weekly Grab Effluent
Total Chromium Monitor&Report Weekly Grab Effluent
Chloride Monitor&Report Weekly Grab Effluent
Total Mercury Monitor&Report Weekly Grab Effluent
Total Nickel Monitor&Report Weekly Grab Effluent
Total Selenium Monitor&Report Weekly Grab Effluent
Total Silver Monitor&Report Weekly Grab Effluent
Total Zinc Monitor&Report Weekly Grab Effluent
Total Beryllium Monitor&Report Weekly Grab Effluent
Notes:
1. "Effluent"shall be defined as the discharge from the FGD wastewater treatment system prior to discharge
to the ash settling basin.
All flows shall be reported on monthly DMRs. Should no flow occur during a given month,the words"no
flow"shall be clearly written on the front of the DMR. All samples shall be of a representative discharge.
DMRs for this outfall shall be submitted only after discharge commences from the FGD system.
Sampling is only required when this outfall is discharging.
A. (8.) SPECIAL CONDITION FOR THE DISCHARGE OF ASIATIC CLAM/DEBRIS
FILTER BACKWASH
The permittee may backwash the intake filter for Unit 5 condenser cooling water on an as-needed basis. It is
understood that this wash water will contain materials indigenous to the Catawba River such as Asiatic clams
and light debris. As these are naturally occurring in the river environment,they may be discharged with no
adverse affects to the receiving stream. The Permittee may not add any detergent,chemicals or other non-
indigenous material to the wash water without explicit permission of the Division of Water Quality.
8

Permit NC0004979
A. (9.) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 24%.
The permit holder shall perform at a minimum,quarterly monitoring using test procedures outlined in the"North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised February 1998,or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-February 1998)or subsequent
versions.The tests will be performed during the months of January,April,July and October. Effluent sampling for
this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit,then multiple-concentration testing shall be performed at a minimum,in each of the two following months
as described in"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-February
1998)or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival.The definition of"detectable impairment,"collection
methods,exposure regimes,and further statistical methods are specified in the"North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure" (Revised-February 1998)or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form(MR-1)for the months in which tests were performed,using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value.Additionally,DWQ Form AT-3(original)is to be sent to the
following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete,accurate,include all supporting chemical/physical measurements and all
concentration/response data,and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,the
permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating the facility
name,permit number,pipe number,county,and the month/year of the report with the notation of"No Flow"in the
comment area of the form.The report shall be submitted to the Environmental Sciences Branch at the address cited
above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream,this permit may be re-opened and modified to include
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document,such as minimum control organism
survival,minimum control organism reproduction,and appropriate environmental controls,shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
9

Permit NC0004979
A. (10.) .BIOCIDE CONDITION
The permittee shall not use any biocides except those approved in conjunction with the permit application. The
permittee shall notify the Director in writing not later than ninety(90)days prior to instituting use of any
additional biocide used in cooling systems which may be toxic to aquatic life other than those previously
reported to the Division of Water Quality. Such notification shall include completion of Biocide Worksheet
Form 101 and a map locating the discharge point and receiving stream. Completion of Biocide Worksheet Form
101 is not necessary for those outfalls containing toxicity testing. Division approval is not necessary for the
introduction of a new biocide into an outfall currently being tested for toxicity.
A. (11.) SPECIAL CONDITIONS
The following special conditions are applicable to all outfalls regulated by NC0004979:
• There shall be no discharge of polychlorinated biphenyl compounds.
• It has been determined from information submitted that the plans and procedures in place at Allen Steam
Station are equivalent to that of a BMP.
• The permittee shall report the presence of cenospheres observed in any samples.
• The applicant is permitted to discharge chemical metal cleaning wastes to the ash basin under the conditions
outlined in the 1976 Riverbend Ash Basin Equivalency Demonstration and the 1994 Allen Steam Station
permit application
• The permittee shall check the diked areas for leaks by a visual inspection and shall report any leakage
detected
• If the permittee,after monitoring for at least six months,determines that he/she is consistently meeting the
effluent limits contained herein,the permittee may request of the Director that the monitoring requirement
be reduced to a lesser frequency.
• Nothing contained in this permit shall be construed as a waiver by the permittee or any right to a hearing it
may have pursuant to State or Federal laws or regulations.
• Low volume waste is defined as follows(as per 40 CFR 423.11(b):
"Low volume wastes sources include,but are not limited to:wastewaters from wet scrubber air pollution
control systems,ion exchange water treatment system,water treatment evaporator blowdown,laboratory
and sampling streams,boiler blowdown,floor drains,cooling tower basin cleaning wastes,and recirculating
house service water systems. Sanitary and air conditioning wastes are not included."
A. (12.) SECTION 316 (B) OF CWA
The permittee shall comply with the Cooling Water Intake Structure Rule per 40 CFR 125.95.
10

NCDENR/DWQ
FACT SHEET AMENDMENT
Duke Energy Corporation-Allen Steam Station
NC0004979
Facility Information
(1.)Facility Name: Allen Steam Station
(2.)Permitted Flow(MGD): No flow limit (6.) County: Gaston
(3.)Facility Class: I (7.)Regional Office: Mooresville
(4.)Pretreatment Program: N/A (8.)USGS Topo Quad: G14NE
(5.)Permit Status: Renewal (9.)USGS Quad Name: Belmont
Stream Characteristics
(1.)Receiving Stream: Catawba/ (7.)Drainage Area(mi2): ??/635
South Fork
Catawba Rivers
(2.)Sub-basin: 03-08-34 (8.) Summer 7Q10(cfs): 95/124
(3.)Stream Index Number: 11-123.5 (9.)Winter 7Q10(cfs): 95/227
(4.) Stream Classification: WS-V B (10.)30Q2(cfs): 3141/309
(5.)303(d)Status: Not listed (11.)Average Flow(cfs): 2,4702/806
(6.)305(b)Status: - (12.)IWC%: 24(Outfall 002)
Notes:
1. 30Q2 for the Catawba River has been defined as the minimum daily average release at Mountain Island
Hydro.
2. Average flow(QA)for the Catawba River has been defined as mean annual flow based on operations
records from 1929 to 2003 at Mountain Island Hydro.
1.0 Proposed Changes Incorporated Into Permit Renewal
• Add language allowing the construction of the FGD system and the dry ash handling system.
• Add monitoring requirements at internal outfall 005(treated FGD wet scrubber wastewater to
ash settling basin).
• Remove arsenic limit and monitoring requirement due to lack of reasonable potential for
levels of this parameter to cause an exceedance of water quality standards.
• Add 3-year compliance schedule for 21 pg/L selenium limit to coincide with the estimated
completion date of the dry ash handling system.
2.0 Summary
Selenium Compliance Schedule
During the comment period,Duke Power and Division staff met to discuss several proposed
changes to the draft permit. The primary point of concern involved the increase in IWC and the
resulting change in permit limits(particularly selenium). Duke indicated that at this time they
would have difficulty meeting the selenium limit,however they will be installing a dry ash
handling system that is expected to cut flows in half. Since the IWC calculation is based on actual
flows,a reduction in flow would decrease the IWC and therefore increase the allowable selenium
limit. Duke has asked Division staff to allow 3 years for the construction of the treatment system
before the 21 }ig/L selenium limit takes effect. Until that time,the existing limit of 31 µg/L will
remain in the permit.

NPDES Permit Amendment-06/28/06 Duke Power/Allen Steam Station •
Page 2 NC0004979
Removal of Arsenic Limit
During the comment period,Duke was able to provide updated 30Q2 and QA values. The RPA
was recalculated using 30Q2=314(minimum daily average release as defined in the FERC
license)and QA=2470 cfs(mean annual flow based on 1929-2003 data for mountain Island
Hydro). Based on this data,there is no longer reasonable potential for an exceedance of arsenic
water quality standards. The RPA yielded a maximum predicted concentration of 203.5 pg/L
and an allowable concentration of 853 pg/L. The arsenic limit and monitoring requirements will
be removed.
Construction of Flue Gas Desulfurization and Dry Ash Handling Systems
Duke plans to install two major pollution control systems at Allen Steam Station in 2009:a Dry
Ash Handling system and a Flue Gas Desulfurization(FGD)system. The Dry Ash Handling
system will decrease the flow and pollutant loading to the ash basin(Outfall 002). The FGD
system will introduce an additional wastewater stream that will be treated by a dedicated
wastewater treatment system(WWTS). Effluent from the WWTS will discharge to the ash basin,
where additional treatment will occur prior to discharge. Once both systems are installed,the
flow rate from the ash basin is expected to be reduced by approximately 50%.
Duke provided expected pollutant concentrations based primarily on models and the analysis of
coal. In some situations,literature research was used along with analytical results from current
FGD sites.

NPDES Permit Amendment-06/28/06 Duke Power/Allen Steam Station
Page 3 NC0004979
Flue Gas Desulfurization Wastewater Characteristics
Potential Projected Projected Projected Applicable
Parameters of Average Concentrations Average Water
Concern concentrations after WWTS Concentrations Quality
in FGD (pg/L) at Outfall 002 Standards
wastewater (pg/L) (Kg/L)
(pg/L)
Antimony 0.02 0.01 0.01 5.6E
Arsenic 0.28 <0.14 0.14 10c
Barium 4.9 <2.5 0.52 1000
Beryllium 0.035 <0.02 <0.0005 0.0068c
Boron 20 10 1.54 750E
Cadmium 0.07 0.035 <0.0005 15.OA
COD 450 225 31
Chloride 2997 1499 184 250000
Chromium 0.40 0.20 0.06 1022A
Cobalt 0.37 0.18 <0.030 -
Copper 0.44 0.22 0.04 7.3A
Fluoride 52.2 26.1 3.46 1800
Lead 0.30 0.15 0.02 33.8A
Manganese 5.74 2.8 0.40 200
Mercury 0.35 0.0005 <0.0001 0.012
Molybdenum 0.43 0.21 0.07 -
Nickel 0.70 0.40 0.06 261A
Selenium 6.9 0.05 0.01 56A
Silver 0.07 0.03 <0.005 1.23A
Sulfate 1500 750 142.1 250000
Temperature 133°F 95°F Ambient Narrative
Thallium 0.22 0.11 0.01 0.35E
TSS 16000 15 10 -
Vanadium 0.21 0.11 0.01 24E
Zinc 0.37 0.18 0.04 67A
C=carcinogen
A=acute criteria
E=EPA criteria
Duke has received permit modifications at several other plants for the addition of FGD systems.
Each of those has received monthly flow monitoring as well as weekly monitoring at an internal
outfall(discharge to ash basin)for the following parameters:
• TSS • Chloride • Silver
• Arsenic • Mercury Zinc
• Cadmium • Nickel
• Chromium • Selenium
In addition,the following appear to be potential pollutants of concern at this facility and will also
be monitored:
• Beryllium
• COD

NPDES Permit Amendment—06/28/06 Duke Power/Allen Steam Station
Page 4 NC0004979
4.0 Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: TBD
Permit Scheduled to Issue: TBD
5.0 State Contact Information
If you have any questions on any of the above information or on the attached permit,please
contact Toya Fields at(919)733-5083,extension 551.
Copies of the following are attached to provide further information on the permit development:
• Draft permit
NPDES Recommendation by:
Signature Date
Regional Office Comments:
A/0 CoH,tc4v/f !o ,f3
Regional Recommendation by:
Signature lJ. /7'4 Date 8'////U ‘
Reviewed and accepted by:
Regional Supervisor:
Signature Date
NPDES Unit Supervisor:
Signature Date

0 W AT 17' Michael F.Easley,Governor
7 William G.Ross Jr.,Secretary
r North Carolina Department of Environment and Natural Resources
L./0 / 1 Alan W.Klimek,P.E.Director
Aivisiop pf Water Quality
AN1J CES
Date March 21,2006 LIQ:; L
v`�ICF
Don Scruggs
Allen Steam Station
PO Box 1006(EC11X) MAR 2 2006
Charlotte,NC 28201-1006
Subject: Notice of Incomplete Discharge Monitoring Report NC0004979
6.f C, : .vi i t
Dear Permittee: 'r°J
The purpose of this letter is to call your attention to problems with the recent submittal of the Discharge
Monitoring Report(DMR)from your facility. As you may know,the data recorded on your DMR is keyed
into the Division's database. Our data entry staff has informed me of problems with your recent DMR
submittal. Until these problems have been corrected,your DMR will be considered incomplete. Please
see the attached form along with a copy of the problem DMR for details regarding the DMR's deficiency.
Incomplete or illegible DMRs affect our staff's ability to provide a timely and effective evaluation of DMR
submittals. Please be aware that until the Division receives a corrected DMR,you may be considered
noncompliant with your NPDES permit and 15A NCAC 02B .0506,and you may be subject to further
enforcement action. Please take the necessary steps to correct the problems and submit two copies of the
amended DMR within fifteen(15)days of the date of this letter to the following address:
Attention: Michele Phillips
Division of Water Quality
Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
Future DMR submittals with the same or similar problems will be unacceptable. If you have any questions
about the proper completion of DMRs,please contact Michele Phillips at 919-733-5083 Ext. 534. Thank
you for your assistance in this matter.
Sincerely,
Michele Phillips
cc: ty
Central Files
N r.
atomCa !/ina
N.C.Division of Water Quality 1617 Mail Service Center Raleigh,North Carolina 27699-1617 Phone: [phone] Customer Service
Internet http://h2o.enr.state.nc.us 512 N.Salisbury St. Raleigh,NC 27604 Fax: [phone] 1-877-623-6748
An Equal Opportunity/Affirmative Action Employer

Notice of Incomplete Discharge Monitoring Report
Permit Number: N JO O t I `
Facility: A'1tV-' T iM- 4.
County: Cc n
DMR Month and Year: 114.A4 -Ciii- 3-$ 1,o
The Division of Water Quality deems the aforementioned DMR as incomplete due to the
following reason(s): (Please see the highlighted areas on the attached DMR for
details.)
❑ The written values are illegible.
•
❑ The Average, Maximum, and/or the Minimum data points have been omitted.
❑ The Units of Measure have been omitted or are incorrect.
❑ The DMR Parameter Codes have been omitted.
E7( Other:
l,�an- -e+� C��Q e c-,12)1E- ` I.�.,o -�,rL s I� cJ-�a, C�c��
�ect nc_or rzc,-• shvc,.R.ft_ 1,212 _ 3q(0�i .

ffk Duke PROCUREMENT, CONSTRUCTION AND EH&S
/Power® Duke Power
526 South Church St.
Charlotte, NC 28202
Mailing Address:
EC13K/P. 0. Box 1006
/ v Charlotte, NC 28201
March 30, 2006
Mr. John Lesley
Mooresville Regional Office
North Carolina Department of Environment and Natural Resources
610 East Center Avenue
Mooresville,NC 28115
Subject: Duke Power Company
Allen Steam Station
NPDES Permit Number NC0004979
•
Dear Mr. Lesley:
With reference to Part II, Section E. 6. of the Allen NPDES permit, this letter is the five day
follow-up report associated with the unauthorized discharge incident at Allen Steam Station
reported to you by Don Scruggs on March 28, 2006 at approximately 8:30 A.M. Approximately
1500 gallons of wastewater was discharged into the Catawba River via stormwater outfall # 15.
This wastewater is predominantly composed of settled ash sluice. This wastewater had been
physically and chemically treated prior to discharge. Under normal operating conditions, this
wastewater is discharged into the Catawba River at NPDES permitted Outfall 002.
This inadvertent discharge was the result of a communication breakdown between contract
employees and the contract supervisor. A formal root cause analysis will be initiated to prevent
future occurrences.
If you have questions or need additional information, please contact Don Scruggs at (704) 829-
2423.
Sincerely,
M S. Hays, General Manager
Environment, Health and Safety
www.du kepower.corn

Duke PROCUREMENT, CONSTRUCTION AND EH&S
*POWer,, Duke Power
526 South Church St.
Charlotte, NC 28202
/ ,/
Mailing Address:
EC13K/P. 0. Box 1006
Charlotte, NC 28201 ..
February 8, 2006
Mr. John Lesley F F
Mooresville Regional Office
North Carolina Department of Environment and Natural Resources
610 East Center Avenue
Mooresville,NC 28115 WA „
1b i I :CTION
Subject: Duke Power Company
Allen Steam Station
NPDES Permit Number NC0004979
Dear Mr. Lesley:
With reference to Part II, Section E. 6. of the Allen NPDES permit, this letter is the five day
follow-up report associated with the overflow incident at Allen Steam Station reported to you by
Don Scruggs on February 6, 2006 at approximately 11:00 A.M. Approximately 500 gallons of
wastewater bypassed treatment and was discharged into the Catawba River via surface runoff
and NPDES Outfall 004 (River Screen Backwash). This wastewater is predominantly composed
of equipment sealing water. After treatment in the ash basin, wastewater is normally discharged
into the Catawba River at NPDES permitted Outfall 002.
On the morning of February 6, 2006, a leak was discovered in the temporary lines used to re-
route plant sump wastewater around a damaged 36 inch discharge pipe. After discovery,the leak
was promptly repaired.
If you have questions or need additional information, please contact Don Scruggs at (704) 829-
2423.
Sincerely,
(Z)42,--42 a..--,-. ----#
Mar . Hays, General Manager
Environment,Health and Safety
v,nmw.dukepower.cum

ON INJECTION TESTSJ
Subject: Re: [Fwd: CARBON INJECTION TESTS]
From: Richard Bridgeman<Richard.Bridgeman@ncmaiLnet>
Date: Fri, 04 Mar 2005 10:11:47-0500
To: Rex Gleason<[e-mail]>
CC: Michael Parker<MichaeLParker@IcmaiLnet>
Neither the Allen nor Buck SS NPDES permits include Hg monitoring/limits. The
permits do, however, have a condition that requires that tests be made using the
lowest detection level available. As proposed, I think Duke should conduct Hg
monitoring of the carbon injection test wastewater at its influent to the ash
basin and near the outlet of the ash basin. Weekly monitoring should be
adequate. I also propose that the first discharge from the facilities' ash basins
following the carbon injection tests include Hg monitoring. If it is determined
that the Hg concentration in the effluents exceed the WQ Standard, then I propose
that Duke test for Hg during subsequent discharge events until compliance is
assured.
I discussed new mercury testing method (EPA Method 1631) with Chet. The
analytical cost for this test runs from about $100 to $400. Prism Lab charges
$100. Prism is also certified in Method 1669, which is the Hg Clean Sampling
Technique. The new method has a detection level below the Water Quality Standard
for Hg, which is 0.012 ug/L. The Duke lab is certified to analyze Hg using the
old method, which at best has a detection level of 0.2 ug/L. The Hg samples at
Cliffside SS during 2003 and 2004 were probably analyzed using the old method.
Rex Gleason wrote:
RB and Mike,
Let me know your thoughts ASAP.
Thanks,
Rex
Subject:
CARBON INJECTION TESTS
From:
Robert R Wylie <[e-mail]>
Date:
Thu, 3 Mar 2005 18:40:47 -0500
To:
[e-mail]
To:
[e-mail]
CC:
[e-mail]
Dear Mr. Gleason:
Duke Power plans to conduct testing of a mercury air pollution reduction system
by injection of activated carbon into the flue gas duct system prior to the
precipitators at Allen Steam Station and Buck Steam Station. This test is
being planned at Allen to last for approximately one week. It is scheduled to
begin March 14, 2005. For Buck the test is scheduled to begin April 11 and
last until May 14, 2005. The carbon will be sluiced to the ash basin during
the testing. From a NPDES standpoint Duke does not foresee any negative
impacts due to this test.
1 of 2 5/2/2005 8:46 AM

r11133 ONINJEC
TION TESTSJ
Two very similar tests were conducted at Cliffside Steam Station in 2003 and
2004. During the first test samples were collected weekly for mercury at the
compliance outfall. All discharge sample results were below detection. All of
these results were reported on the DMR. During the second test at Cliffside in
discussions with the Asheville NCDENR Office it was agreed upon to only conduct
in-process sampling in order to minimize compliance monitoring and reporting.
All in-process samples near the outfall were also below detection during the
second test.
For the carbon injection tests at Allen and Buck, based on the test results at
Cliffside, Duke Power proposes to conduct in-process monitoring for mercury.
For Allen, since it is only for one week, Duke proposes to collect one sample
at the influent to the ash basin and also one sample at a location upstream
from the final discharge point. For Buck, since it is for 5 weeks, Duke
proposes to collect in-process samples every other week at the influent to the
ash basin and near the final discharge point.
Please advise if this approach is acceptable to you. If you need additional
information please feel free to contact me.
Sincerely,
Robert Wylie
Environment, Health and Safety
Office Phone Number 704 382-4669
Fax Number 704 382-9840
Mail Code: EC11E
e-mail address: [e-mail]
2 of 2 5/2/2005 8:46 AM

Duke WILLIAM F. HALL, III
Vice
Group Vice President
*Power® Fossil-Hydro Generation
Duke Power
EC11P/ 526 South Church Street
Charlotte, NC 28202-1802
704 382 3940
704 382 9840 fax
[e-mail]
October 26, 2005 I
RECE
VED
OCT 3 12005
NC DEPT.OF ENVIRONMENT
Ms. Coleen Sullins AND NATURAL RESOURCES
Permits and Engineering Unit MOORESVILLE REGIONAL OFFICE
North Carolina Department of Environmental,
Health and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJECT: Delegation of Authority- Requested Information
Duke Energy NPDES Permitted Stations
Notification of Mail Code Address Change
Dear Ms. Sullins:
Duke Power requests the State's databases be revised to reflect that all correspondence and
requested information related to the permits specified in the attached list be addressed to Mr. J.
Allen Stowe — Mail Code EC13K, Duke Energy Corporation, P.O. Box 1006, Charlotte, NC 28201-
1006. This will prevent any delays of correspondence associated with NPDES permits.
If you have questions or need additional information, please contact Mr. Stowe at 704-382-4309.
Sincerely,
./j467
Bill Hall
GVP Fossil/Hydro Generation
Duke Power
Attachment
cc: NCDENR, Mooresville, NC
David Goodrich, NCDENR, Raleigh, NC
Steve Mauney, NCDENR, Winston-Salem, NC
Forest Westall, NCDENR, Asheville, NC
www.dukepower.corn

Permits Currently Held:
II�i1 ,p004979
Belews Creek Steam Station - NC0024406
Belews Creek Steam Station -WO0005873
Belews Creek Steam Station Flyash Landfill Permit#85-03
Buck Steam Station- NC0004774
Cliffside Steam Station - NC0005088
Dan River Steam Station - NC0003468
Lincoln Combustion Turbine Station- NC0080781
Marshall Steam Station - NC0004987
Marshall Steam Station Flyash Landfill Permit#18-04
Riverbend Steam Station - NC0004961
Bridgewater Hydro Station- NCG500102
Cowans Ford Hydro Station - NCG500139
Lookout Shoals Hydro Station- NCG500120
Mountain Island Hydro Station - NCG500131
Oxford Hydro Station - NCG500119
Rhodhiss Hydro Station - NCG500108
Tuxedo Hydro Station- NCG500110
Bear Creek Hydro Station—NCG500124
Bryson Hydro Station—NCG500129
Cedar Cliff Hydro Station—NCG500125
Mission Hydro Station—NCG500128
Nantahala Hydro Station—NCG500136
Tennessee Creek Hydro Station—NCG500123
Thorpe Hydro Station—NCG500127
Tuckaseegee Hydro Station—NCG500126

rW ATF9QMichael F.Easley,Governor
(� William G.Ross Jr.,Secretary
DUNorth Carolina Department of Environment and Natural Resources
p _ f� Alan W.Klimek,P.E.Director
Division of Water Quality
December 15, 2004
5134 , .
Ms. Penny Franklin
Duke Energy Allen Steam Station
MGO3A2
Hagers Ferry Rd.
Huntersville, NC 28078-
SUBJECT: Wastewater/Groundwater Laboratory Certification Renewal
FIELD PARAMETERS ONLY
Dear Ms. Franklin:
The Department of Environment and Natural Resources, in accordance with the provisions of NC GS 143-215-
.3 (a) (10), 15 NCAC 2H .0800, is pleased to renew certification for your laboratory to perform specified
environmental analyses required by EMC monitoring and reporting regulations 15 NCAC 2B .0500, 2H .0900 and
2L .0100, .0200, .0300, and 2N .0100 through .0800.
Enclosed for your use is a certificate describing the requirements and limits of your certification. Please review
this certificate to insure that your laboratory is certified for all parameters required to properly meet your
certification needs.
Please contact us at 919-733-3908 if you have questions or need additional information.
Sincerely,
James W. Meyerr
Laboratory Section
Enclosure
cc: Chet Whiting
Mooresville Regional Office
•
Noe Carolina
Ntura!!y
Laboratory Section 1623 Mail Service Center;Raleigh,NC 27699-1623
4405 Reedy Creek Road;Raleigh,NC 27607
Phone[phone]/FAX [phone]/Internet: www.dwglab.org
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper

STATE OF NORTH CAROLINA DEPARTMENT OF THE
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
LABORATORY CERTIFICATION PROGRAM
In accordance with the provisions of N.C.G.S. 143-215.3(a)(1), 143-215.3(a)(10)and NCAC 2H.0800:
Field Parameter Only
.r! ySTATE
QN
ff ..
Mr.Y 10 r7s
it 41.1
J t �; tie. A
1_-� 1 lh'
(,,,,,\
\\,...„,.
.1pRIL R.17j6 \2 ^4/Qf1A M vtd�� f
DUKE ENERGY ALLEN STEAM STATION
Is hereby certified to perform environmental analysis as listed on Attachment l and report monitoring data to DWQ for
compliance with NPDES effluent, surface water, groundwater, and pretreatment regulations.
By reference 15A NCAC 2H.0800 is made a part of this certificate.
This certificate does not guarantee validity of data generated,but indicates the methodology,equipment, quality control procedures,
records,and proficiency of the laboratory have been examined and found to be acceptable.
This certificate shall be valid until December 31, 2005
Certificate No. 5134 el(James W.

Attachment
North Carolina Wastewater/Groundwater Laboratory Certification
Certified Parameters Listing
FIELD PARAMETERS ONLY
_ab Name: Duke Energy Allen Steam Station Certificate Number: 5134
address: MGO3A2 Effective Date: 01/01/2005
Hagers Ferry Rd. Expiration Date: 12/31/2005
Huntersville, NC 28078- Date of Last Amendment:
the above named laboratory,having duly met the requirements of 15A NCAC 2H.0800,is hereby certified for the measurement of the parameters listed below.
CERTIFIED PARAMETERS
INORGANICS
Std Method 4500 H B
TEMPERATURE
Std Method 2550B
This certification requires maintance of an acceptable quality assurance program,use of approved methodology,and satisfactory performance on evaluation samples. Laboratories are
subject to civil penalties and/or decertification for infractions as set forth in 15A NCAC 2H.0807.

VMa
��.� .. aei r.E:. �. n,
^ ��il �an, hos..Jr..Secret:\ North Carolina Department orEnvirrnment and Natunrl ltmour
Alan W.Klimek.!'.G Dime Division of Water Qual
Coker H.Sullins.Depur Dire:
Dtviston of-Water Quul
October 1, 2004
Mr. Michael Ruhe,Manager Water Protection
Duke Energy Corporation
PO Box 1006 (EC11E) •
Charlotte,North Carolina 28201-1006
Subject: Compliance Biomonitoring Inspection
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County,NC
Dear Mr. Ruhe:
•
Enclosed is a copy of the Compliance Biomonitoring Inspection Report for the inspection
conducted at the subject facility on September 24, 2004 by Mr. John Lesley of this Office. Please
inform the facility's Operator-in-Responsible Charge of our findings by forwarding a copy of the •
enclosed report. Toxicity test results will be forwarded under separate cover when available.
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
Gaston County Health Department
JL
NorthCaroIina ii7(►4
,JVaturalllg NCDENR
N.C.Division of Water Quality, Mooresville Regional Office, 919 North Main Street, Mooresville NC 28115 [phone] Ctutoma Scrvic
1-8 i i-623.6748

tEo 8T� United States Environmental Protection Agency,Washington,DC 20460 Form Approved
Ate` NPDES Compliance Inspection Report ©F•� OMB No.2040-0003
`' North Carolina Department of Environment and Natural Resources Approval Expires
Division of Water Quality,Mooresville Regional Office NCDENR 7/31/85
Section A: National Data System Coding
Transaction Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector Facility Type
N 5 NC0004979 04/09/24 B S 2
Inspection Work Days Facility Self-Monitoring Evaluation Rating BI QA ....Reserved
2 5 N N
Section B: Facility Data
Entry Time: Permit Effective Date:
Name and Location of Facility Inspected: 10:50 am July 1,2002
Duke Power Allen Steam Station Exit Time:
off Highway 273,south of Belmont 12:00 pm Permit Expiration Date:
Gaston County,North Carolina Date: May 31,2005
04/09/24
Name(s)of On-Site Representatives Title(s) Phone No(s):
Don Scruggs/ORC/704-829-2350
Name and Address of Responsible Official: Title:
Mr. Michael Ruhe Manager,Water Protection
Duke Energy Corporation
PO Box 1006(EC11E) Phone No. Contacted?
Charlotte,North Carolina 28201-1006 704-373-3231 No
Section C:
Areas Evaluated During Inspection
® Permit ® Flow Measurement ® Operations&Maintenance ❑ Sewer Overflow
®Records/Reports ® Self-Monitoring Program ❑ Sludge Handling/Disposal ❑ Pollution Prevention
® Facility Site Review ❑ Compliance Schedules ❑ Pretreatment Program ❑ Multimedia
® Effluent/Receiving Waters ❑ Laboratory ❑ Stormwater ❑ Other:
Section D: Summary of Findings/Comments
See Attached Sheet(s) for Summary
Toxicity test results will be forwarded under separate cover when available.
Signature(s)of Inspect ): Agency/Office/Telephone: Date:
John Lesley sS DENR-DWQ/MRO/[phone] FAX: [phone] October 1,2004
J
Signature of Reviewer: Agency/Office Date:
Regulatory Office Use Only
Action Taken Date:
Noncompliance
Compliance
EPA Form 3560-3 (Revised 3-85)Previous Editions are Obsolete

Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 2
Permit:
The permit contains the following outfalls:
Outfall 001 Discharge of once through non-contact cooling water
Outfall 002 An ash pond discharge consisting of septic tank/sand filter effluent,
groundwater remediation system effluent, coal yard drainage, boiler room
drainage,turbine room drainage, and stormwater runoff
Outfall 002A Coal yard sump overflow
Outfall 002B Power house sump overflows
Outfall 003 Discharge of miscellaneous non-contact cooling waters
Outfall 004 Discharge of miscellaneous non-contact cooling water, vehicle wash water,
intake screen backwash, and intake filter backwash
Facility Site Review/Operations and Maintenance:
Operation and maintenance of the facility are commendable. A designated Operator-in-
Responsible Charge (ORC) and three backup ORCs staff the facility. The designated ORC and
backup ORCs have WWTP Operator Grade II Certification and Physical/Chemical I
Certification. Total suspended residue testing is conducted in-house for process control.
Outfall 001:
The condenser cooling water is conveyed to the discharge canal that flows to the South
Fork Catawba River.
Outfall 002:
The only wastewater treatment discharge entering the ash basin is a septic tank discharge
for domestic wastewater. Stanley Septic Tank Services remove septage generated by the septic
tank. Additional treatment in the ash basin includes pH adjustment (carbon dioxide, sulfuric
acid, and sodium hydroxide) available at the discharge if needed. A pilot study for the removal
of selenium consisting of Ferric sulfate/sulfuric acid addition for flocculation, 7—20,000 gallon
detention tanks, and 56 filtration units has been implemented. Selenium is suspected in high
alkaline coal used at the facility.
The ash basin appeared to be well maintained. The ash basin discharges to the Catawba River.

Ve Power Allen Steam Station
NPDES Permit No.NC0004979
Page 3
Outfall 002A and 002B:
No overflows occurred in the previous 12-month period. Discharges to the Catawba
River.
Outfall 003:
Discharges to the discharge canal (South Fork Catawba River).
Outfall 004:
Discharges to the Catawba River.
Outfall 005:
Discharges to the Catawba River.
All outfalls appeared to be well maintained and were readily accessible. No adverse
impacts to the receiving waters were observed.
Records and Reports:
The facility maintains records consisting of ORC and maintenance logs, laboratory
analysis reports, chain of custody forms, calibration logs, and monthly monitoring reports. Flow
records are maintained in a computer database. All records were complete and up-to-date.
Laboratory:
The on-site lab is certified to conduct pH and temperature measurements (Certificate No.
5134). Temperature is measured by means of a thermocouple on the condenser cooling water
discharge that is calibrated twice annually using an NIST certified thermometer. Toxicity testing
is performed by Environmental Testing Solutions. Duke Energy Analytical Laboratory, Prism
Labs, and Pace Laboratories conducts other analyses.

Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 4
Self-Monitoring Program:
Monthly monitoring reports were reviewed for the period August 2003 through July
2004. A toxicity limit violation was reported in October 2003. A Notice of Violations was
issued on January 8, 2004 for the violation. All samples are collected and maintained on ice. A
comprehensive chain of custody procedure is followed in the collection and shipment of samples.
Flow Measurement:
Flow is measured by means of calculating the rate of flow from pump curve at outfall
001. A staff gauge is used to measure flow at Outfall 002 (ash basin discharge).
Effluent/Receiving Waters:
None of the discharges appeared to have an adverse impact on the receiving waters.
Samples were collected at outfall 002 (ash basin) for use in a chronic Ceriodaphnia dubia
pass/fail toxicity test. Toxicity test results will be forwarded under separate cover when
available.

A Michael F. Easley
FtW>
TF Governor
NCDENR William G. Ross,Jr.,Secretary
co 7
r North Carolina Department of Environment and Natural Resources
—IO ''' Alan W. Klimek, P.E., Director
Division of Water Quality
September 9,2004
Michael A.Ruhe
Duke Energy Corporation
PO Box 1006
Charlotte,NC 28201-1006
Subject: Renewal Notice
NPDES Permit NC 004979
Plant Allen Steam Station
Gaston County
Dear Permittee:
Your NPDES permit expires on May 31,2005. Federal(40 CFR 122.41) and North Carolina(15A NCAC 2H.0105(e))
regulations require that permit renewal applications must be filed at least 180 days prior to expiration of the current permit. If
you have already mailed your renewal application,you may disregard this notice.
To satisfy this requirement,your renewal package must be sent to the Division postmarked no later than December 2,
2004. Failure to request renewal by this date may result in a civil assessment of at least$500.00. Larger penalties may be assessed
depending upon the delinquency of the request.
If any wastewater discharge will occur after May 31,2005,the current permit must be renewed. Discharge of wastewater
without a valid permit would violate North Carolina General Statute 143-215.1;unpermitted discharges of wastewater may be
assessed civil penalties of up to$25,000 per day.
If all wastewater discharge has ceased at your facility and you wish to rescind this permit,contact me at the telephone
number or address listed below. You may also contact the Mooresville Regional Office at(704) 663-1699 to begin the rescission
process.
Use the enclosed checklist to complete your renewal package. The checklist identifies the items you must submit with
the permit renewal application. If you have any questions,please contact me at the telephone number or e-mail address listed
below.
Sincerely,
ter //.. / "
t,�
VANfq !��iiC:UliU �kt i C4r,o(ENVt
RONME� 1
)7
E
Charles H.Weaver,Jr. �0ORE RSC;�,RCEB
-
NPDES Unit 1 - 1FFICE
cc: Central Files SEP 1 4 2D04
Iooi:esvilllle Regime=Office,:Water Quality S, ci
NPDES File
A fi wd.Li'1 y Sir-e )i
1617 Mail Service Center,Raleigh,North Carolina 27699-1617 919 733-5083,extension 511 (fax)919 733-0719
Visrr US ON THE INTERNET l http://h2o.enr.state.nc.us/NPDES e-mail:charles.weaver©ncmail.net

NPDES Permit NC0004979
Plant Allen Steam Station
Gaston County
The following items are REQUIRED for all renewal packages:
❑ A cover letter requesting renewal of the permit and documenting any changes at the facility since
issuance of the last permit. Submit one signed original and two copies.
❑ The completed application form (copy attached), signed by the permittee or an Authorized
Representative. Submit one signed original and two copies.
❑ If an Authorized Representative (such as a consulting engineer or environmental consultant) prepares
the renewal package, written documentation must be provided showing the authority delegated to any
such Authorized Representative (see Part II.B.11.b of the existing NPDES permit).
❑ A narrative description of the sludge management plan for the facility. Describe how sludge (or other
solids) generated during wastewater treatment are handled and disposed. If your facility has no such
plan (or the permitted facility does not generate any solids), explain this in writing. Submit one signed
original and two copies.
The following items must be submitted by any Municipal or Industrial facilities discharging
process wastewater
Industrial facilities classified as Primary Industries (see Appendices A D to Title 40 of the Code of Federal
Regulations,Part 122) and ALL Municipal facilities with a permitted flow>_ 1.0 MGD must submit a
Priority Pollutant Analysis (PPA) in accordance with 40 CFR Part 122.21.
The above requirement does NOT apply to privately owned facilities treating 100%
domestic wastewater, or facilities which discharge non process wastewater(cooling
water, filter backwash, etc.)
PLEASE NOTE:
Due to a change in fees effective January 1, 1999,there is no renewal fee required with your
application package.
Send the completed renewal package to:
Mr. Charles H. Weaver,Jr.
NC DENR/ Water Quality / NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617

A / file:///Untitled
ty
Ron,
I have checked with Dave Goodrich in Raleigh re. this matter. Hopefully we'll be able to get the ATC
issued sooner than the allotted time. In the meanwhile, it is all right for Duke to continue operating the
existing pilot system until ATC is issued and permanent facilities are constructed. Let me know if you
have further questions/concerns.
Rex
Ronald E Lewis wrote:
Per our phone conversation,please provide confirmation that continuing to
use pilot system is okay until installation of the requested ATC is
approved and implemented.
Forwarded by Ronald E Lewis/Gen/DukePower on 05/04/2004 10:21 AM
Ronald E Lewis
To: [e-mail]
04/28/2004 09:59 cc: [e-mail], [e-mail]
AM Subject: Allen Steam Station-Request for ATC for treatment
system submitted March 24,
Please advise to the status of your review of the ATC request to install a
chemical injection system based on our pilot test. As noted in our
request, Duke anticipates that construction and initial operation of the
chemical injections system will take approximately six months (Tentative
Schedule is ATC approved May 2004 and Construction from June to October
2004. Since approval of the pilot study extension request was only
effective through April 30, 2004,please confirm Duke's request to continue
to operate the pilot system, as needed, until the ATC modifications can be
implemented.
Rex Gleason- [e-mail]
%TITLE%
North Carolina Dept. of Environment&Natural Resources
Div. of Water Quality
919 N. Main St.
Mooresville,NC 28115
Ph: [phone] Fax: [phone]
1 of 1 5/4/2004 2:14 PM

F W A T� Michael F.Easley,Governor
Q q William G.Ross Jr.,Secretary
\OCR PG North Carolina Department of Environment and Natural Resources
C) . r Alan W.Klimek,P.E.Director
> Division of Water Quality
p Coleen H.Sullins,Deputy Director
Division of Water Quality
December 30, 2003
SS
5134 �---
Mr. Paul Fitzgerald
Duke Energy Cliffside Steam Station
MGO3A2
Hagers Ferry Rd.
Huntersville, NC 28078-
SUBJECT: Laboratory Certification Maintenance Inspection
Dear Mr. Fitzgerald:
Enclosed is a report for the inspection performed on November 20, 2003 by Mr.
Chester E. Whiting. Where deficiencies are cited in this report, a response is required as
well as for all lettered comments and/or recommendations. Within thirty days of receipt,
please supply this office with a written item for item description of how these deficiencies,
comments and/or recommendations were corrected. If the deficiencies cited in the
enclosed report are not corrected, enforcement actions will be recommended. For
certification maintenance, your laboratory must continue to carry out the requirements set
forth in 15A NCAC 2H .0800.
Copies of the checklists completed during the inspection may be requested from this
office. Thank you for your cooperation during the inspection. If you wish to obtain an
electronic copy of this report by email, or if you have questions or need additional
information please contact us at 919-733-3908.
Sincerely,
1M4d4j4/11A
James W. Meyer
Laboratory Section
Enclosure
cc: Chester E. Whiting
Mooresville Regional Office
NEbENR
N.C.Division of Water Quality Laboratory Section 1623 Mail Service Center Raleigh,North Carolina 27699-1623 [phone]
FAX: [phone]

On-Site Inspection Report
LABORATORY NAME: Duke Power Allen Steam Station
ADDRESS: Duke Power Company Mail Code: MGO3A2
13339 Hager's Ferry Road
Huntersville, NC 28078-7929
CERTIFICATE NUMBER: 5134
DATE OF INSPECTION: November 20, 2003
TYPE OF INSPECTION: Field Parameter (Maintenance)
EVALUATOR: Chet Whiting
LOCAL PERSON(S) CONTACT: Mr. Paul Fitzgerald, Mr. Don Scruggs
I. INTRODUCTION:
The above named laboratory was inspected to verify compliance with 15A NCAC 2H .0800 for
the analysis of environmental samples.
II. OVERVIEW:
Inspections for Field Personnel were conducted at Marshall Steam Station since this was a
central location. Personnel were professional and courteous throughout the inspection process.
III. DEFICIENCIES, REQUIREMENTS, COMMENTS, AND RECOMMENDATIONS:
GENERAL:
COMMENT: The date received and opened is recorded on the pH buffer container. This
information will be lost when the container is discarded.
RECOMMENDATION: It is strongly recommended that the facility document the following
information: vendor, lot number expiration date, date received and date opened in the
operators log or pH workbook. This information should be recorded each time a new lot is
received or a new container is put into service. Documenting this information will provide a
traceable hard record to verify that the analysis was performed using the proper reagents.
Please bear in mind that this information could prove valuable should data be challenged, or a
data review be conducted at a much later date.
pH:
A. COMMENT: Units of measure were not recorded.
REQUIREMENT: 15A NCAC 2H .0805 (g) (1) states " Data pertinent to each analysis must be
maintained for five years. Certified data must consist of date collected, time collected, sample
site, sample collector, and sample analysis time. The field benchsheets must provide a space for
the signature or initials of the analyst, and proper units of measure for all analyses."

Duke Power Allen Steam Station Field Parameter Inspection 2
NOTE: A cover statement may be used on the worksheet, or in the log for each parameter. For
example: All pH measurements are recorded in S.U.
TEMEPERATURE:
NOTE: The temperatures are recorded in-stream by a continuous monitor. The data is relayed to
a computer that averages values and transfers this information directly to the DMR spreadsheet
program. The thermistor for each site is checked with a JOFRA/AMETEK Temperature
Calibrator. The temperature calibrator is checked with an NIST thermometer owned by Duke
Power. This information is traceable and on file as series of work orders. The temperature
variation of the units examined did not exceed 0.1°. This type of temperature analysis has been
discussed with DWQ and has been accepted in this instance.
IV. CONCLUSION:
Correcting the above-cited comments and implementing the recommendations will help this
facility to produce quality data and meet certification requirements. Please respond to all
lettered comments.
Report prepared by: Chet Whiting Date: November 26, 2003

1144 Duke
Power.
A Duke Energy Company Allen Steam Station
253 Plant Allen Rd.
Belmont, NC 28012
November 12, 2003
Ms. Sonja Williams
Mooresville Regional Office
North Carolina Department of Environment and Natural Resources
919 North Main Street
Mooresville, NC 28115
Subject: Duke Power Company
Plant Allen
&A STo n1 Co
Dear Ms. Williams:
On the evening of June 5, 2003 the yard drainage sump discharge pipe at Plant Allen was
determined to have a leak. Flow to this pipe was isolated and approximately 325 ft of
pipe replaced. Repairs were completed on November 11`h and the yard drainage system
is operating normally.
If you need additional information or have questions please contact Don Scruggs at
704 829-2423.
Sincerely,
Gf-z� (i- �Czcvyyt�
ionesAND
Donald L. Scruggs
WAr
Environmental Coordinator M�..0tE k.
NOV 1 7 2003
4TER QUALITY SECTION

\NA f Michael F. Easley,Governor
,,,.. \'y , William G.Ross Jr.,Secretary
` a
{ \ North Carolina Department of Environment and Natural Resources
r t , Alan W.Klimek, P.E. Director
,.. -' Division of Water Quality
11/6/03
fiY6,5).0. / NC DEP t.L
svtjALOFnCE
RESOURCES
v)// Michael A. Ruhe Ra;, • •
Duke Energy Corporation
P.O. Box 1006 NOV 1 3 2003
Charlotte, NC 282011006
SUBJECT: Payment Acknowledgment
Civil Penalty Assessment QUALITY SECTION
Plant Allen Steam Station WATER t1
Gaston County
Permit No: NC0004979
LV-2003-0641
Dear Mr. Ruhe:
This letter is to acknowledge receipt of check No. 0002006946 in the amount of$335.04 received
from you dated October 29, 2003. This payment satisfies in full the civil assessment levied against
the subject facility and this case has been closed. Payment of this penalty in no way precludes
future action by this Division for additional violations of the applicable Statutes, Regulations, or
Permits.
If you have any questions, please call Robert L Sledge at [phone] ext 547.
Sincerely,
At C • 71- ,
For Coleen Sullins, Deputy Director
Division of Water Quality
cc: Enforcement File#: LV-2003-0641
Central Files
1617 Mail Service Center Raleigh,NC 27699-1617 [phone] Customer Service 1 800 623-7748

•
Duke FOSSIL-HYDRO GENERATION
Power® Duke Power
A Duke Energy Company EC11 E/526 South Church Street
Charlotte, NC 28202-1802
NC DEPT.OF ENVIRONMEN
AND NATURAL RESOURCES
MOORESVILLr^'"OIONAL OFFIi._
October 30, 2003 P
NOV 0 3 2003
North Carolina Department of Environment and Natural Resources
Point Source Compliance/Enforcement Unit
Division of Water Quality
1617 Mail Service Center WATER "'` v1` 4
Raleigh, North Carolina 27699-1617
Subject: Notice of Violation and Assessment of Civil Penalty
Case No. LV-2003-0641
Duke Power Company
Plant Allen Steam Station
NPDES Permit No. NC0004979
Gaston County:
On October 9, 2003 Duke Power received a civil penalty notification "Notice of Violation
and Assessment of Civil Penalty for Violations of N.C. General Statute 143-215.1(a)(6)
and NPDES Permit No. NC0004979." Duke Power regrets this action was necessary.
A check in the amount of$335.04 is attached.
Please direct any correspondence or questions concerning this issue to John Mease at
704-382-3946.
Sincerely,
kin :11-44/1 (4-4"-c,
Michael A. Ruhe, Manager
Environmental Support
C: Rex Gleason — Mooresville Regional Office (NCDENR)
www.duke-energy.corn

1
THE FACE OF THIS DOCUMENT CONTAINS MICRO PRINTING
11% Duke Power Gen-Support Groups Wachovla, N.A.
®Ene1 j+/ Duke Energy Corporation -
0002006946
6 422 South ChUrch'Street Greenville,SC
P803B i A22 s.cnl, n 51ree1 Charlotte,NC 28237
P.O.Box 1244.
Charlotte,NC 28201-1244
67-1/532
Date 10/29/2003 Pay Amount $ *********335.04
Pay Three hundred thirty five and 04/100 Dollars
To The DEPT OF ENVIRONMENT&NATURAL RESOURCES
Order of POINT SOURCE COMPLIANCE/ENFORCEMENT
DIV OF WATER QUALITY-1617 MAIL SEAA411 Z A.A4-6-.--
Raleigh,NC 27699-1617
AUTHORIZED SIGNATURE
0000 200 6114 611' 1:0 5 3 2000 L 9': 20 799001, 30 L 5 211'
THE BACK OF THIS DOCUMENT CONTAINS AN ARTIFICIAL WATERMARK-HOLD AT AN ANGLE TO VIEW WHEN CHECKING ENDORSEMENT _

N"16
O� WA Michael F.Easley.Go�i or
� QG William G.Ross Jr.,Secretary
7 North Carolina Department of Environment and Natural Resources
> 1 Man W.Klimek,P.E.,Director
Division of Water Quality
Coleen H.Sullins,Deputy Director
Division of Water Quality
October 7, 2003
CERTIFIED MAIL 1 OD 1 51 O OcXote lout, 5504
RETURN RECEIPT REQUESTED
Mr. Michael A. Ruhe, Water Compliance Manager
Duke Energy Corporation
P.O. Box 1006 (EC l l E)
Charlotte,NC 28201-1006
SUBJECT: Notice of Violation and Assessment of Civil
Penalty for Violations of N.C. General Statute
143-215,1(a)(6) and NPDES Permit No. NC0004979
Plant Allen Steam Station
Case No. LV-2003-0641
Gaston County
Dear Mr. Ruhe:
This letter transmits a Notice of Violation and assessment of civil penalty in the amount of
$335.04 ($250.00 civil penalty+$85.04 enforcement costs) against Duke Energy Corporation.
This assessment is based upon the following facts: A review has been conducted of the
discharge monitoring report (DMR) submitted by Duke Energy Corporation for the month of July
2003. This review has shown the subject facility to be in violation of the discharge limitations
found in NPDES Permit No. NC0004979. The violations are summarized in Attachment A to this
letter.
Based upon the above facts, I conclude as a matter of law that Duke Energy Corporation
violated the terms, conditions or requirements of NPDES Permit No.NC0004979 and North
Carolina General Statute(G.S.) 143-215.1(a)(6) in the manner and extent shown in Attachment
A. A civil penalty may be assessed in accordance with the maximums established by G.S. 143-
215.6A(a)(2).
Based upon the above findings of fact and conclusions of law,and in accordance with
authority provided by the Secretary of the Department of Environment and Natural Resources and
the Director of the Division of Water Quality, I, D. Rex Gleason, Water Quality Regional
Supervisor for the Mooresville Region, hereby make the following civil penalty assessment against
Duke Energy Corporation:
NCDENR
Mooresville Regional Office,919 North Main Street,Mooresville,North Carolina 28115
Phone [phone] Customer Service
Fax [phone] 1-877-623-6748

$ 250.00 For 1 of the one (1) violation of G.S. 143-
215.1(a)(6) and NPDES Permit No. NC0004979, by
discharging waste into the waters of the State in
violation of the permit daily maximum effluent limit
for Total Selenium.
$ 0 For 0 of the one (1) violation of G.S. 143-
215.1(a)(6) and NPDES Permit No. NC0004979, by
discharging waste into the waters of the State in
violation of the permit daily maximum effluent limit
for pH.
$ 250.00 TOTAL CIVIL PENALTY
$ 85.04 Enforcement costs.
$ 335.04 TOTAL AMOUNT DUE
Pursuant to G.S. 143-215.6A(c), in determining the amount of the penalty I have taken
into account the Findings of Fact and Conclusions of Law and the factors set forth at G.S. 143B-
282.1(b), which are:
(1) The degree and extent of harm to the natural resources of the State, to the public
health, or to private property resulting from the violations;
(2) The duration and gravity of the violations;
(3) The effect on ground or surface water quantity or quality or on air quality;
(4) The cost of rectifying the damage;
(5) The amount of money saved by noncompliance;
(6) Whether the violations were committed willfully or intentionally;
(7) The prior record of the violator in complying or failing to comply with programs
over which the Environmental Management Commission has regulatory authority;
and
(8) The cost to the State of the enforcement procedures.
Within thirty days of receipt of this notice, you must do one of the following:
1. Submit payment of the penalty:
Payment should be made directly to the order of the Department of Environment
and Natural Resources (do not include waiver form). Payment of the penalty will
not foreclose further enforcement action for any continuing or new violation(s).
Please submit payment to the attention of
Point Source Compliance/Enforcement Unit
Division of Water Quality
1617 Mail Service Center
Raleigh,North Carolina 27699-1617

OR
2. Submit a written request for remission including a detailed justification for
such request:
Please be aware that a request for remission is limited to consideration of the five
factors listed below as they may relate to the reasonableness of the amount of the
penalty assessed. Requesting remission is not the proper procedure for contesting
whether the violation(s) occurred or the accuracy of any of the factual statements
contained in the civil penalty assessment document. Because a remission request
forecloses the option of an administrative hearing, such a request must be
accompanied by a waiver of your right to an administrative hearing and a
stipulation that no factual or legal issues are in dispute. Please prepare a detailed
statement that establishes why you believe the civil penalty should be remitted, and
submit it to the Division of Water Quality at the address listed below. In
determining whether a remission request will be approved, the following factors
shall be considered:
(1) whether one or more of the civil penalty assessment factors in G.S. 143B-
282.1(b) were wrongfully applied to the detriment of the petitioner;
(2) whether the violator promptly abated continuing environmental damage
resulting from the violation;
(3) whether the violation was inadvertent or a result of an accident;
(4) whether the violator had been assessed civil penalties for any previous
violations; or
(5) whether payment of the civil penalty will prevent payment for the
remaining necessary remedial actions.
Please note that all information presented in support of your request for remission
must be submitted in writing. The Director of the Division of Water Quality will
review your evidence and inform you of his decision in the matter of your
remission request. The response will provide details regarding case status,
directions for payment, and provision for further appeal of the penalty to the
Environmental Management Commission's Committee on Civil Penalty Remissions
(Committee). Please be advised that the Committee cannot consider information
that was not part of the original remission request considered by the Director.
Therefore, it is very important that you prepare a complete and thorough statement
in support of your request for remission.
In order to request remission,you must complete and submit the enclosed"Waiver
of Right to an Administrative Hearing and Stipulation of Facts" form within thirty
(30) days of receipt of this notice. The Division of Water Quality also requests
that you complete and submit the enclosed"Justification for Remission Request."
Both forms should be submitted to the following address:

•
Point Source Compliance/Enforcement Unit
Division of Water Quality
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
OR
3. File a petition for an administrative hearing with the Office of
Administrative Hearings:
If you wish to contest any statement in the attached assessment document you
must file a petition for an administrative hearing. You may obtain the petition
form from the Office of Administrative Hearings. You must file the petition with
the Office of Administrative Hearings within thirty(30) days of receipt of this
notice. A petition is considered filed when it is received in the Office of
Administrative Hearings during normal office hours. The Office of Administrative
Hearings accepts filings Monday through Friday between the hours of 8:00 a.m.
and 5:00 p.m., except for official state holidays. The original and one (1) copy of
the petition must be filed with the Office of Administrative Hearings. The petition
may be faxed—provided the original and one copy of the document is received in
the Office of Administrative Hearings within five (5) business days following the
faxed transmission. The mailing address for the Office of Administrative Hearings
is:
Office of Administrative Hearings
6714 Mail Service Center
Raleigh,North Carolina 27699-6714
Telephone: [phone] Facsimile: [phone]
A copy of the petition must also be served on DENR as follows:
Mr. Dan Oakley, General Counsel
Department of Environment and Natural Resources
1601 Mail Service Center
Raleigh,North Carolina 27699-1601
Please indicate the case number(as found on page one of this letter) on the
petition.
Failure to exercise one of the options above within thirty(30) days of receipt of this letter,
as evidenced by an internal date/time received stamp (not a postmark), will result in this matter
being referred to the Attorney General's Office for collection of the penalty through a civil action.
Please be advised that additional penalties may be assessed for violations that occur after the
review period of this assessment. If the violations are of a continuing nature, not related to
operation and/or maintenance problems, and you anticipate remedial construction activities, then
you may wish to consider applying for a Special Order by Consent. If you have any questions
about this civil penalty assessment or a Special Order by Consent, please contact the Water
Quality Section staff of the Mooresville Regional Office at 704/663-1699.

Dck_ 72oc7
(Date) D. Rex Gle on, P.E.
Water Quality Regional Supervisor
Mooresville Regional Office
Division of Water Quality
ATTACHMENTS
cc: Water Quality Regional Supervisor w/attachments
Compliance/Enforcement File w/attachments
Central Files w/attachments
RMB

.
Attachment A
Duke Energy Corporation
Plant Allen Steam Station
NPDES Permit No.NC0004979
Case Number LV-2003-0641
Limit Violations,July 2003
Daily Maximum Limit Violations
Parameter Reported Value Limit Units
Total Selenium 40.4 * 31.0 µg/L
PH 9.3 >_6.0 - <9.0 s.u.
* denotes assessment of civil penalty.

•
•
STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT
AND NATURAL RESOURCES
COUNTY OF Gaston
IN THE MATTER OF ASSESSMENT ) WAIVER OF RIGHT TO AN
CIVIL PENALTIES AGAINST ) ADMINISTRATIVE HEARING
) AND STIPULATION OF FACTS
Duke Energy Corporation )
PERMIT NO. NC0004979 ) FILE NO. LV-2003-0641
Having been assessed civil penalties totaling$335.04 for violation(s) as set forth in the
assessment document of the Division of Water Quality dated October 7, 2003, the undersigned,
desiring to seek remission of the civil penalties, does hereby waive the right to an administrative
hearing in the above-stated matter and does stipulate that the facts are as alleged in the assessment
document. The undersigned further understands that all evidence presented in support of
remission of this civil penalty must be submitted to the Director of the Division of Water Quality
within 30 days of receipt of the notice of assessment. No new evidence in support of a remission
request will be allowed after 30 days from the receipt of the notice of assessment.
This the day of , 2003
BY
ADDRESS
TELEPHONE

•
JUSTIFICATION FOR REMISSION REOUEST
DWQ Case Number: LV-2003-0641
Assessed Party: Duke Energy Corporation
Permit No. (if applicable): NC0004979 (Plant Allen Steam Station)
County: Gaston
Amount Assessed: $335.04
Please use this form when requesting remission of this civil penalty. You must also complete the
" Waiver of Right to an Administrative Hearing and Stipulation of Facts" form to request
remission of this civil penalty. You should attach any documents that you believe support your
request and are necessary for the Director to consider in evaluating your request for remission.
Please be aware that a request for remission is limited to consideration of the five factors listed
below as they may relate to the reasonableness of the amount of the civil penalty assessed.
Requesting remission is not the proper procedure for contesting whether the violation(s) occurred
or the accuracy of any of the factual statements contained in the civil penalty assessment
document. Pursuant to N.C.G.S. § 143R-282.1(c), Temission of a civil penalty may he granted
only when one or more of the following five factors applies. Please check each factor that you
believe applies to your case and provide a detailed explanation, including copies of supporting
documents, as to why the factor applies (attach additional pages as needed).
(a) one or more of the civil penalty assessment ctors in N.C.G.c 143B-282.l(b)
were wrongfully applied to the detriment of the petitioner(the assessment factors are
listed in the civil penalty assessment document);
(hl the vnolatrr nrmm�tly a}.atPd cnntin1.1ntr entrirnnrnentgll r1.imarre rp.1 1tina �i•nm the
\ 1 Y Y J d "'b" �.b
violation (Le., explain the steps that you took to correct the violation and prevent future
occurrences);
(c) the violation was inadvertent nr a result of an accident (i.e., e plain why the
violation way unavoidable nr something you rnuld not prevent nr preparefnr);
(r1) the violator had not been accecced civil penalties for any previous violations;
(e) payment of the civil penalty will prevent payment for the remaining necessary
remedial actions (i.e. -explain how payment nf•the civil penalty will prevent ynunm
nertnrmino the nrtivitiec nereccnry to arhiove rmmnlinnrel
PXPI ANAT1ON•

.r
•
EFFLUENT
' cERMtT NO NC000497f DISCHARGE NO. 002 MONTH July YEAR. 2003
,7Y NAME Alien Steam Station CLASS I COUNTY Gaston
4ATOR IN RESPONSIBLE CHARGE (ORCI Don Scruggs GRADE I PHONE [phone]
aTiciED LABORATORIES (1) Duke Power Env.Services-246 (2)
.HECK.BOX IF ORC HAS CHANGED D PERSON(S)COLLECTING SAMPLES Staff
' Man ORIGINAL and ONE COPY to i _ O
ATTN CENTRAL FILES / �/
• DIVISION OF WATER QUALITY X / )`I ' //x.f b �C /� ram..-- '�
DEHNR • (SIGNATIIR,.EKOPERATOR IN RESPONSIBLE CHARGE) DATE
P O.BOX 29535
RALEIGH NC 276 6-0535 By this signature.I certify that this report is accurate and complete to the best of my knowledge.
W
,, 1 1` I .53 1 tiMS 1 IX)555 1 o05S 1 3ur- 1 3.6 ot04: I 010.5 1 MO: 1 Du, I 00665 1 oorAO TGF3e 1 0103. 1
j C C V. w I Fiow E = 9
<•
• uIc Gn cF I X m - - c _ - S _ o Eco m
a
C,. W C w - _ - '6 r - - a m o -
• LL; 0 O << O -• / 'm / c`
1 FIRS 1 HRS I YIN MGD I SU 1 moll I mryi uai 1 ugl g'I mon m 1 uan a9 u mn1 1 ma9 1 P/F 1 ma/I
( 11 0700 I 9 I Y 1 25.5 1 7.0 <5.0 8.0 <10.0 1 <10.0 <0.005 1 0.07 ( 14.2 23.1 <0.010 I 0.72 ( <0.04
21 0700 I 9 I Y I I I I 1
31 0700 r 9 1 Y I I 1 I 1 I I I
41 0700 1 9 1 B I I I 1 I I
510700 9 B ( I I I I I r
610700 9 I B I I I 1 I 1 I I I I
I 71 0700 9 1 Y I I I I 1 I I
51 0700 I 9 1 Y 1 I 1
910700 9 1 Y 8.6 I I I I I I 1 1 I I ,
1 t31 0700 I 9 I Y 23.9 7.7 I I I I 1
( r11 0700 1 9 1 Y 1 9.5
:2! 1300 I 2 1 Y I 9.3 P I 1 I
13( 0700 1 9 1 Y 8.3 1 I I I 1 1 I I _94-1 I I 1 1
141 0700 I 9 I Y I I I / I I I I 1
151 0700 I 9 1 Y 25.2 1 7.3 I I I I I 0.004 I I 40.4)1 1 I P
1e 0700 1( 9 1 Y I S.4 1 I I
171 0700I 9 1 Y I I 1 I 1 I I I I I I 1
tel 0700 1 9 1 Y 1 I I I I 1 I I
131 0700 ( 9 1 Y I I ' I I ( I 1 1 I 1 I
231 0700 1 9 Y 1 I 1 I
211 0700 1 9 Y I I I I I I I I I
221 07001 9 Y 0.7 1 I I I I
( 10700I 9 1 Y I I I 1 I I I I I
241 07001 9 I B I I I 1 I I
291 0700 i 9 1 B I 1 ! 1 I I I I 1 1 I I
I 2e1 070D I 9 1 B 1 I I I I 1
2710700 9 1 B I I 1 I I I I 1 ( I I
2^1 0700 9 I B I I I I
291 0700 9 1 B 0.7 I I I I I I
331 0700 I 9 1 Y I
3110700I 9 I Y I I I 1 I
Average 1 15.2 0.0 8.0 0.0 0.0 I 0.002 0.07 14.2 31.8 I 0.000 I 0.72 0.00
!Maximum I 25.5 9.3 <5.0 8.0 <10.0 <10.0 <0.005 0.07 14.2 1 40.4 <0.010 I 0.72 <0.04
!Minimum I 0.7 7.0 I <5.0 8.0 <10.0 <10.0 0.004 0.07 I 14.2 1 23.1 I <0.010 0.72 <0.04
IComc.(Ci!Grab(G) G G G G G G G ( G G G G 1 G G
1Montniy Limit 6.0-9.0 15.0 1 30.0 - - - - I - - - - 1 16 Fanotty Status:(Please cnecx one of the following) DEM Form MR-1(8/94)
Ali monitoring oata and sampling frequencies meet permit requirements 1 I Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements I x I Noncomoiian: See Attainment (5 E= C 0 vE/2 L.sue•,
"I certify under penalty of law,that this document and all attacnments were prepared under my direction or supervision in acccoroance with a system designed to assure that qualified
oersonnei oroperiy gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system.or those persons oirectly responsible for gatnering
:tie information.the information submitted is.to Inc pest of my knowledge and belief true.accurate.and complete. I am aware tnat there are significant penalties for submitting false
information.mcluoing Inc possibility of fines and imprisonment for knowing violations."
A � - � f /�
M1Lcnael A.Ruhe I'kor I�✓.„f'n '/"`,.'�'',- p'l�.o/�3
Perrninee(Please print or type) Signature of Permittee" Date
°0 Box 1006(EC11E1 Charlotte.NC 28201-1006 704-373-3231 05/31/2005
Pe:m:nee Aoaress Phone Numoer Permit Exp.Date
'ORC must visit facility and document visitation of facility as reoutred per 15A NCAC 8A.0202 ID)(5)(B)
-,`sacred py other tnan the permittee.delegation Cf signatory autnonty must be on file with the state per 15A NCAC 2B.0506(b)(2)(D)_
"'Mu:::oie Systems Operating
Tne morcniy average for fecal coliform is to be reporteo as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting oats.

,‘ -/7 . ' .
Permit NC0004979
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on the effective date of this permit and lasting until expiration. the Permittee is
authorized to discharge from outfall 002. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Monthly Daily Measurement I Sample Type Sample Location .
Average Maximum Frequency 1 _
Flow Weekly Instantaneous or Influent or Effluent
estimate
Oil and Grease 15.0 ma/I 20.0 mg/1 Quarterly 1 Grab Effluent
Total Suspended Solids 30.0 mg/I 100.0 ma/l Monthly Grab Effluent •
Biological Oxygen Demand(BM), Quarterly Grab Effluent
200C2
Fecal Coliform Quarterly I Grab Effluent
Total Copper2 1.0 mg/I 2/Month Grab Effluent
Total Iron2 1.58 mg/1 Monthly Grab Effluent
Total Arsenic2 I Monthly Grab Effluent ,
Total Selenium2 31.0 4/1 2/Month Grab Effluent
•
Total Phosphorus Semi-annually Grab Effluent .
Total Nitrogen(NO2+NO3+TKN) Semi-annually Grab Effluent
Chronic Toxicity' Quarterly Grab Effluent
Total Chromium2 I Quarterly I Grab Effluent
Phenol3 Quarterly Grab Effluent
Naahthal.ene3 ) Quarterly Grab Effluent
Sulfate Quarterly Grab Effluent .
Total Barium2 I. 1 Quarterly [ Grab Effluent
•
Total Nickell Quarterly Grab Effluent
Cyanide 1 Quarterly Grab Effluent
•
Total Zinc2 Quarterly Grab Effluent
•
TotQuarterly I Grab Effluent
pH4 I I Monthly Cadmium2 Grab Effluent
Notes:
1. Whole Effluent Toxicity shall be monitored by chronic toxicity (Ceriodaphnia) P/F at 16%. Tests
shall be conducted in January, April, July and October (see Part A.(8.) for details)
2. Total metals are defined by 40 CFR 136. Any method specified by 40 CFR 136 is considered
acceptable for analysis.
3. Monitoring for these parameters shall continue until groundwater remediation activities are
completed.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
4

.01 W A 7- it? Michael F.Easley,G vemor
William G.Ross,Jr.,Secretary
. ' G Department of Environment and Natural Resources
Alan W.Klimek, P.E.Director
—I Division of Water Quality
Coleen Sullins,Deputy Director
Division of Water Quality
October 28, 2003
Mr. Michael A. Ruhe, Manager
Environmental Support
Duke Power Company
EC11E
526 South Church Street
Charlotte,N.C. 28202-1802
Subject: Pilot Study Extension Request
Selenium Reduction
Allen Steam Plant
NPDES Permit No. NC0004979
Gaston County
Dear Mr. Ruhe:
This Office is in receipt of your letter dated October 27, 2003 concerning a request to
extend the on-going pilot study, which was designed to reduce the selenium concentration in the
wastewater discharged from Duke's Allen Steam Station. Selenium concentrations in the effluent
have been found to exceed the NPDES permit daily maximum limitation of 31 ug/L. The pilot
study involved the rerouting of wastewater flow in the existing ash basin through a vegetated area
of the basin where selenium concentrations have been found to be within permit compliance.
Ferric sulfate was also added to enhance the precipitation of the selenium as it passed through the
vegetated area. The rerouting of the existing waste stream and the addition of the ferric sulfate was
expected to reduce effluent selenium concentrations to below your current NPDES permit limit.
Based on preliminary results from the study, Duke has been able to maintain compliance
with the current NPDES limit. However, per your October 27th letter, continued addition of the
ferric sulfate is going to be necessary as long as high alkaline coal is your predominant fuel source.
In your letter, you requested that the pilot study be extended for up to one year, while the design of
a permitted treatment system is completed by Duke's staff, and modification of the subject permit is
completed by the Division's NPDES Unit.
Based on this Office's review of your request, we have no objection to extending the on-
going pilot study, however, six months should be ample time in which to prepare the necessary
plans and specifications and obtain the appropriate approvals from the Division. The results from
your current study should have provided you with the information needed to prepare the design for
your proposed treatment system and permit modification. For this reason,the approval of this pilot
study extension request is only effective from the date of this letter through April 30, 2004. Please
note that under no circumstances should this approval be construed as authorization for Duke
Power to exceed any existing NPDES permit limitation or to by-pass any existing wastewater
treatment process.
A A
R
Customer Service Division of Water Quality 919 North Main Street Mooresville,NC 28115 Phone [phone]
1 877 623-6748 Fax [phone]

Mr. Michael A. Ruhe
October 28, 2003
Page Two
If you have any questions regarding this matter, please contact Mr. Michael Parker or
me at 704-663-1699.
Sincerely,
7-) -) /
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Cc: Dave Goodrich
Kevin Bowden
/mlp
h\gen\p i lotstdy 102803.doc

Duke FOSSIL-HYDRO GENERATION
Power®
A Duke Energy Company n Duke Power
EC11E/526 South Church Street
u +� Charlotte, NC 28202-1802
October 27, 2003
MC DEPT.0 ViR) MtisiT
AND P ATUR tc,,.} SOURCES
iii0OREsvo 3FFRCE
Mr. Rex Gleason r
Water Quality Supervisor
North Carolina Department of OCT 2 8 2003
Natural Resources
919 North Main Street
Mooresville, NC 28115
l"^R
Subject: Allen Steam Station
NPDES Permit NC0004979
Pilot Test for Selenium Reduction
Dear Mr. Gleason:
Duke Power appreciates your cooperation and approval to conduct a pilot test for selenium
reduction with addition of ferric sulfate within the ash basin of Allen Steam Station through
October 2003. Further testing has confirmed that the addition of ferric sulfate to maintain
compliance with the NPDES permit selenium limit is needed, if a high alkaline coal is the
predominant fuel source. Thus, Duke Power requests permission to continue to use the current
addition system for one year as needed, while submittal of a design and modification of the
permitted treatment system is evaluated by your NPDES Permitting Unit in Raleigh, North
Carolina. The pilot treatment system is currently approved to add up to 100 gallons of ferric
sulfate per 5.0 MGD of wastewater.
If you need to discuss further information, please contact Ron Lewis [phone] or me (980)
373-3231.
Sincerely,
frk tikAA C't avAtt
Michael A. Ruhe, Manager
Environmental Support
Attachments
cc: Mr. David Goodrich, NCDENR-Raleigh
www.duke-energy.corn

r[P
Duke FOSSIL-HYDRO GENERATION
Power®
Duke Power
A Duke EnergyCompany Pan Y EC11E/526 South Church Street
Charlotte, NC 28202-1802
% lilt DEPT.C.54. r. '0,4647
AND NA''. - , . ';CES
�AOORES� .,:FILE
September 18, 2003
Mr. Rex Gleason
Mooresville Regional Office SEP 2 2 2003
North Carolina Department of Environment and Natural Resources
919 North Main Street
Mooresville, NC 28115 Subject: Duke Power Company WATER ER <-• • . w:v.
Plant Allen Stream Station
Gaston County
NPDES Permit Number NC0004979
Dear Mr. Gleason:
This letter fulfills the 5 day written notification requirement as stipulated by the NPDES permit Part II,
Section E. 6. a. for an NPDES permit exceedance at Plant Allen on July 15, 2003. Duke Power
became aware of the exceedance on July 17th (received the analytical result) and verbally notified
Mr. Richard Bridgeman of your office. At outfall #002 (ash basin treatment system) selenium was
measured at 40.4 ug/L exceeding the NPDES permit limit of 31.0 ug/L daily maximum. Mr.
Bridgeman extended the notification requirement until the root cause was determined.
A (pilot)temporary treatment for the elevated selenium was approved by your office and was set up
at the ash basin wastewater treatment system, which is still in use. In addition, the plant significantly
reduced its operation, which greatly reduced the flow to the ash basin. On August 9, 2003 a required
compliance sample was collected. The result (12.7ug/L) was below the permitted daily maximum.
A root cause team of six Duke Power professionals was given the task to determine the cause of the
elevated selenium. The primary cause was determined to be coal containing high calcium, which
caused high alkalinity and high pH in the ash sluice. Elevated alkalinity and pH contributed to
selenium being released from solids (flyash). Thus in the elevated alkalinity and pH the selenium
was released from the ash as it was being sluiced to the ash basin. Duke Power has put processes
in place to prevent future recurrences.
If you need additional information or have questions, please contact either John Mease at 704 382-
3946 or Don Scruggs at 704 829-2423.
Sincerely,
A,
Michael A. Ruhe, Manager
Environmental Support
www.duke-energy.corn

Michael F.Easley,Govemor 46
PIC1?(:)
William G.Ross Jr..Secretary
North Carolina Department of Environment and Natural Resources v
fAlan W.Klimek,P.E.,Director
'� Division of Water Quality
Coleen H.Sullins,Deputy Director
Division of Water Quality
September 18, 2003
Mr. Michael Ruhe, Manager Water Protection
Duke Energy Corporation
PO Box 1006 (EC11E) •
Charlotte,North Carolina 28201-1006
Subject: Compliance Biomonitoring Inspection
Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Gaston County,NC
•
Dear Mr. Ruhe:
Enclosed is a copy of the Compliance Biomonitoring Inspection Report for the inspection
conducted at the subject facility on September 16, 2003 by Mr. John Lesley of this Office. Please
inform the facility's Operator-in-Responsible Charge of our findings by forwarding a copy of the
enclosed report. Toxicity test results will be forwarded under separate cover when available.
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
Gaston County Health Department
JL
NCDENR
Mooresville Regional Office,919 North Main Street,Mooresville,North Carolina 28115
Phone [phone] Customer Service
Fax [phone] 1-877-623-6748

osr,�s United States Environmental Protection Agency, Washington, DC 20460 Form Approved
A -ri NPDES Compliance Inspection Report © irA OMB No.2040-0003
North Carolina Department of Environment and Natural Resources Approval Expires
'' NCDENR'LMalt- Division of Water Quality, Mooresville Regional Office 7/31/85
Section A: National Data System Coding
Transaction Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector Facility Type
N 5 NC0004979 03/09/16 B S 2
Inspection Work Days Facility Self-Monitoring Evaluation Rating BI QA Reserved
2 5 N N
Section B: Facility Data
Entry Time: Permit Effective Date:
Name and Location of Facility Inspected: 11:05 July 1,2002
Duke Power Allen Steam Station Exit Time:
off Highway 273,south of Belmont 12:10 Permit Expiration Date:
Gaston County,North Carolina Date: May 31,2005
03/09/16
Name(s)of On-Site Representatives- Title(s)- -Phone No(s):
Don Scruggs/ORC/704-829-2350
Name and Address of Responsible Official: Title:
Mr. Michael Ruhe Manager, Water Protection
Duke Energy Corporation Phone No. Contacted?
PO Box 1006(EC 11 E) 704-373-3231 No
Charlotte,North Carolina 28201-1006
Section C:
Areas Evaluated During Inspection
® Permit ® Flow Measurement ® Operations&Maintenance
❑ Sewer Overflow
® Records/Reports ® Self-Monitoring Program ® Sludge Handling/Disposal 1=11 Pollution Prevention
® Facility Site Review ❑ Compliance Schedules ❑ Pretreatment Program ❑ Multimedia
® Effluent/Receiving Waters ❑ Laboratory ❑ Stormwater
❑ Other:
Section D: Summary of Findings/Comments
See Attached Sheet(s) for Summary
Toxicity test results will be forwarded under separate cover when available.
Signature(s)of Ins ector . Agency/Office/Telephone: Date:
John Lesley DENR-DWQ/MRO/[phone] FAX: [phone] September 18,2003
•
Signature of Reviewer: Agency/Office Date:
Regulatory Office Use Only
Action Taken Date:
Noncompliance
Compliance
EPA Form 3560-3 (Revised 3-85)Previous Editions are Obsolete

Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 2
John Lesley last inspected this facility on August 2, 2002.
Permit:
The permit contains the following outfalls:
Outfall 001 Discharge of once through non-contact cooling water
Outfall 002 An ash pond discharge consisting of septic tank/sand filter effluent,
groundwater remediation system effluent, coal yard drainage, boiler room
drainage, turbine room drainage, and stormwater runoff
Outfall 002A Coal yard sump overflow
Outfall 002B Power house sump overflows
Outfall 003 Discharge of miscellaneous non-contact cooling waters
Outfall 004 Discharge of miscellaneous non-contact cooling water, vehicle wash water,
intake screen backwash, and intake filter backwash
Backwash water discharged from the intake filter for Unit 5 condenser cooling water is
permissible so long as no detergent, chemicals, or other non-indigenous material are used in the
backwash process (see Part A (7)— Special Condition of Asiatic Clam/Debris Filter Backwash of
the NPDES Permit).
Pump seal cooling water is discharged to a ditch that conveys stormwater to the discharge
canal for outfalls 001 and 003. According to the permit application received by the Division on
March 1, 2001, the stormwater outfall was included in the stormwater group application
submittal (March 1991) to the EPA. It is recommended that the outfall be added in next permit
renewal.
Facility Site Review/Operations and Maintenance:
Operation and maintenance of the facility are commendable. A designated Operator-in-
Responsible Charge (ORC) and three backup ORCs staff the facility. The designated ORC and
backup ORCs have WWTP Operator Grade II Certification and Physical/Chemical I
Certification. Total suspended residue testing is conducted in-house for process control.
Outfall 001:
The condenser cooling water is conveyed to the discharge canal that flows to the South
Fork Catawba River.
Outfall 002:
The only wastewater treatment discharge entering the ash basin is a septic tank discharge
for domestic wastewater. Stanley Septic Tank Services remove septage generated by the septic
tank. Additional treatment in the ash basin includes pH adjustment (carbon dioxide, sulfuric

Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Page 3
acid, and sodium hydroxide) available at the discharge if needed. A pilot study for the removal
of selenium consisting of Ferric sulfate/sulfuric acid addition for flocculation, 7—20,000 gallon
detention tanks, and 56 filtration units has been implemented. Selenium is suspected in high
alkaline coal used at the facility.
The ash basin appeared to be well maintained. The ash basin discharges to the Catawba
River.
Outfall 002A and 002B:
No overflows occurred in the previous 12-month period. Discharges to the Catawba
River.
Outfall 003:
Discharges to the discharge canal (South Fork Catawba River).
Outfall 004: •
Discharges to the Catawba River.
Outfall 005:
Discharges to the Catawba River.
All outfalls appeared to be well maintained and were readily accessible. No adverse
impacts to the receiving waters were observed.
Records and Reports:
The facility maintains records consisting of ORC and maintenance logs, laboratory
analysis reports, chain of custody forms, calibration logs, and monthly monitoring reports. Flow
records are maintained in a computer database. All records were complete and up-to-date.
Laboratory:
The on-site lab is certified to conduct pH and temperature measurements (Certificate No.
5134). Temperature is measured by means of a thermocouple on the condenser cooling water
discharge that is calibrated twice annually using an NIST certified thermometer. Toxicity testing
is performed by Environmental Testing Solutions. All other analyses and testing are conducted
at the Duke Power Analytical Laboratory.

Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 4
Self-Monitoring Program:
Monthly monitoring reports were reviewed for the period July 2002 through June 2003.
No violations were reported during the period. All samples are collected and maintained on ice.
A comprehensive chain of custody procedure is followed in the collection and shipment of
samples.
Sludge Disposal:
Ash is reused in accordance with Ash Reuse Permit No. WQ0003255.
Flow Measurement:
Flow is measured by means of calculating the rate of flow from pump curve at outfall
001. A staff gauge is used to measure flow at Outfall 002 (ash basin discharge).
Effluent/Receiving Waters:
None of the discharges appeared to have an adverse impact on the receiving waters.
Samples were collected at outfall 002 (ash basin) for use in a chronic Ceriodaphnia dubia
pass/fail toxicity test. Toxicity test results will be forwarded under separate cover when
available.

elenium Treatm...eam Station Ash Basin Discharge 002
Subject: Update on the Pilot Selenium Treatment System at Allen Steam Station Ash
Basin Discharge 002
Date: Fri, 5 Sep 2003 16:10:16 -0400
From: "Ronald E Lewis" <relewis1 @duke-energy.com>
To: [e-mail]
Appreciate you taking time today to discuss operation of the pilot selenium
treatment system and our plan going forward to enable lowering of the water
level in the ash basin. In addition to continued operation of the pilot
treatment system until normal operation is possible, we will move forward
with our plan to keep 3 of 5 units off-line and route ash-free sluice water
across the ash basin to enable mixing and release of more water from the
ash basin. The pilot treatment system currently processes enough water (6
to 7 MGD) to maintain compliance with the selenium limit and the water
level at eight inches below overflow with two units operating.
Per our plan, two sluice lines (the one line that services both Units 1&2
and the one that services Unit 5) will be connected to an 18 inch HPDE pipe
to route ash-free sluice water to the discharge tower. Mixing at the
discharge tower to further reduce selenium concentrations will allow the
release of the average volume of water (20 to 25 MGD) . Simultaneous to
this effort, the root cause investigation will enable barriers and
processes to be implemented to prevent such events in the future. One
action already identified and being implemented is the addition of sulfuric
acid within the sluice lines of the two operating units to increase
precipitation of selenium with available iron in the ash being sluiced.
1 of 1 9/9/03 8:49 AM

r�`p G William G.Ross Jr.,Secretary
North Carolina Department of Environment and Natural Resources
> _I Alan W.Klimek,P.E.,Director
1 +< Division of Water Quality/
61—'16— (C-116'
August 5,2002
Mr. Michael Rhue, Manager Water Protection
Duke Energy Corporation
13339 Hagers Ferry Road(MGO3A5)
Huntersville,North Carolina 28078-7929
Subject: Compliance Biomonitoring Inspection
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County,NC
Dear Mr. Rhue:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection
conducted at the subject facility on August 2,2002 by Mr. John Lesley of this Office. Please inform
the facility's Operator-in-Responsible Charge of our findings by forwarding a copy of the enclosed
report.
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,
R, .,,L....� M_ gn%� ....„ -.U--„-
ic\ D. Rex Gleason,P.E.
Water Quality Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
JL
grA
NCDENR
N.C.Division of Water Quality 919 North Main Street,Mooresville NC 28115 Phone[phone]
• FAX [phone]

,� United States Environmental Protection Agency,Washington,DC 20460 Form Approved
'SD_ A NPDES Compliance Inspection Report ©IYA OMB No.2040-0003
North Carolina Department of Environment and Natural Resources ---� Approval Expires
Division of Water Quality,Mooresville Regional Office NCDENR 7/31/85
SectionA: National Data System Coding
Transaction Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector Facility Type
N 5 NC0004979 02/08/02 B S 2
Inspection Work Days Facility Self-Monitoring Evaluation Rating BI QA ...........Reserved
2 5 N N
Section B:Facility:Data
Entry Time: : Permit Effective Date:
Name and Location of Facility Inspected: 10:30 July 1,2002
Duke Power Allen Steam Station Exit Time:
off Highway 273,south of Belmont 12:10 Permit Expiration Date:
Gaston County,North Carolina Date: May 31,2002
02/08/02
Name(s)of On-Site Representatives Title(s)-Phone No(s):
Don Scruggs/ORC/704-829-2350
Name and Address of Responsible Official: Title: •
Mr.Michael Rhue Manager,Water Protection
Duke Energy Corporation Phone No. Contacted?
13339 Hagers Ferry Road 704-875-5961 No
Huntersville,North Carolina 28078-7929
Section C:
Areas Evaluated During Inspection
® Permit ® Flow Measurement ® Operations&Maintenance ❑ Sewer Overflow
®Records/Reports ® Self-Monitoring Program ® Sludge Handling/Disposal D Pollution Prevention
®Facility Site Review ❑ Compliance Schedules ❑ Pretreatment Program ❑ Multimedia
®Effluent/Receiving Waters ❑ Laboratory ❑ Stormwater ❑ Other:
Section D: Summary oflindings/Comments
See Attached Sheet(s)for Summary
Toxicity test results will be forwarded under separate cover when available.
Signature(s)of Inspector s • Agency/Office/Telephone: . Date:
John Lesley,, "`__K6 DENR-DWQ/MRO/[phone] FAX: [phone] August 5,2002
Signature of Reviewer: Agency/Office Date:
Regulatory Office Use Only
Action Taken Date:
Noncompliance
Compliance
EPA Form 3560-3 (Revised 3-85)Previous Editions are Obsolete

r ,
Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 2 •
John Lesley last inspected this facility on July 17, 2001.
Permit:
The permit contains the following outfalls:
Outfall 001 Discharge of once through cooling non-contact cooling water
Outfall 002 An ash pond discharge consisting of septic tank/sand filter effluent,
groundwater remediation system effluent, coal yard drainage,boiler room
drainage,turbine room drainage, and stormwater runoff
Outfall 002A Coal yard sump overflow
Outfall 002B Power house sump overflows
Outfall 003 Discharge of miscellaneous non-contact cooling waters
Outfall 004 Discharge of miscellaneous non-contact cooling water, vehicle wash water,
intake screen backwash, and intake filter backwash
Outfall 005 Debris filter backwash(to be included in renewed permit)
Facility Site Review/Operations and Maintenance:
Operation and maintenance of the facility are commendable. A designated Operator-in-
Responsible Charge(ORC) and three backup ORCs staff the facility. The designated ORC and
backup ORCs have WWTP Operator Grade II Certifications. Total suspended residue testing is
conducted in-house for process control.
Outfall 001:
The condenser cooling water is conveyed to the discharge canal that flows to the South
Fork Catawba River. New piping has been installed and the canal bank has recently been
stabilized to prevent erosion.
Outfall 002:
The only wastewater treatment discharge entering the ash basin is a septic tank discharge
for domestic wastewater. Stanley Septic Tank Services remove septage generated by the septic
tank. Additional treatment in the ash basin includes pH adjustment(carbon dioxide, sulfuric
acid, and sodium hydroxide) available at the discharge if needed. The ash basin appeared to be
well maintained. The ash basin discharges to the Catawba River.
Outfall 002A and 002B:
No overflows occurred in the previous 12-month period. Discharge to the Catawba
River.

Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Page 3
Outfall 003:
Discharges to the discharge canal (South Fork Catawba River).
Outfall 004:
Discharges to the Catawba River. •
Outfall 005:
Discharges to the Catawba River.
All outfalls appeared to be well maintained and were readily accessible. No adverse
impacts to the receiving waters were observed.
Records and Reports:
The facility maintains records consisting of ORC and maintenance logs, laboratory
analysis reports, chain of custody forms, calibration logs, and monthly monitoring reports. Flow
records are maintained in a computer database. All records were complete and up-to-date.
Laboratory:
The on-site lab is certified to conduct pH and temperature measurements (Certificate No.
5134). Temperature is measured by means of a thermocouple on the condenser cooling water
discharge that is calibrated twice annually using an NIST certified thermometer. Toxicity testing
is performed by Environmental Testing Solutions. All other analyses and testing are conducted
at the Duke Power Analytical Laboratory. Pace Labs is used on an as needed basis.
Self-Monitoring Program:
Monthly monitoring reports were reviewed for the period June 2001 through May 2002.
One toxicity test failure was reported in October 2001. Follow-up tests were conducted in
November and December 2001 that resulted in chronic values>64%. A Notice of Violation was
issued for the October 2001 violation. All samples are collected and maintained on ice. A
comprehensive chain of custody procedure is followed in the collection and shipment of samples.
Sludge Disposal:
Ash is reused in accordance with Ash Reuse Permit No. WQ0003255.

Duke Power Allen Steam Station
•
NPDES Permit No.NC0004979
• Page 4
Flow Measurement:
Flow is measured by means of calculating the rate of flow from pump curve at outfall
001. A staff gauge is used to measure flow at Outfall 002 (ash basin discharge).
Effluent/Receiving Waters:
None of the discharges appeared to have an adverse impact on the receiving waters.
Samples were collected at outfall 002 (ash basin) for use in a chronic Ceriodaphnia dubia
pass/fail toxicity test. Toxicity test results will be forwarded under separate cover when
available.

ttt
OF WATF
OtJ 9Q Michael F.Easley,Governor
y William G. Ross,Jr.,Secretary
Department of Environment and Natural Resources
< Alan W. Klimek, P.E. Director
Division of Water Quality
July 24, 2003
Mr. Michael A. Ruhe, Manager
Environmental Support
Duke Power Company
EC11E
526 South Church Street
Charlotte,N.C. 28202-1802
Subject: Pilot Study Request
Selenium Reduction
Allen Steam Plant
NPDES Permit No. NC0004979
Gaston County
Dear Mr. Ruhe:
This Office is in receipt of your letter dated July 22, 2003 concerning a request to conduct a
pilot study designed to reduce the selenium concentration in the wastewater discharged from
Duke's Allen Steam Station. Selenium concentrations in the effluent have been found to exceed the
NPDES permit daily maximum limitation of 31 ug/L.
The pilot study will involve the rerouting of wastewater flow that passes through the
existing ash basin. A diagram submitted with your request details a proposed rerouting sequence
that involves the utilization of a vegetated area of the existing basin where selenium concentrations
have been found to be within permit compliance. In addition, you propose to add ferric sulfate to
enhance the precipitation of the selenium as it passes through the vegetated area. An amount not to
exceed 100 gallons per 5.0 MG of wastewater is proposed (this concentration has been approved by
staff with the Division's Aquatic Toxicology Unit). From there, the wastewater will be pumped
directly to the ash basin's outfall structure. The rerouting of the existing waste stream through the
vegetated area, and the addition of the ferric sulfate is expected to reduce effluent selenium
concentrations to below your current NPDES permit limit. Your letter also noted that Duke Power
began excavating ash from the basin(to gain additional capacity and increased retention time) on
July 22, 2003 in hopes that this will also improve selenium removal.
W)
Customer Service Division of Water Quality 919 North Main Street Mooresville, NC 28115 Phone [phone]
1 800 623-7748 Fax [phone]

Mr. Michael A. Ruhe
July 24, 2003
Page Two
Based on our review of your request, this Office has no objection to Duke's proposal to
conduct a pilot study involving the rerouting of wastewater flows through Allen Steam Plant's
existing ash basin and the use of Ferric Sulfate to enhance selenium precipitation at the
concentrations noted above. This approval is effective from the date of this letter through
September 30, 2003. If the results of this pilot study are favorable, and if Duke Power desires to
continue with the pilot program, then it is recommended that Duke Power submit a request to have
the subject NPDES permit modified to allow for the continuation of this flow sequence and
chemical addition. Please note that under no circumstances should this approval be construed as
authorization for Duke Power to exceed any existing NPDES permit limitation or to by-pass any
existing wastewater treatment process.
If you have any questions regarding this matter, please contact Mr. Michael Parker or me at
704-663-1699.
Sincerely,
/7), /7?--(efit7-:e
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Cc: Dave Goodrich -
Kevin Bowden
/mlp
h\gen\pilotstdy.doc

diDuke FOSSIL-HYDRO GENERATION
Power®
A Duke Energy Company Duke Power
EC11 E/526 South Church Street
July 22,2003 Charlotte, NC 28202-1802
Mr.Rex Gleason IllettPT.OF E ONS
Water Quality Supervisor NATURAL RESOURCES
North Carolina Department of SV%U `' ` AL OFF
Natural Resources
919 North Main Street
Mooresville,NC 28115
JUL 2 3 2003
Subject: Allen Steam Station
NPDES Permit NC0004979
Pilot Test for Selenium Reduction
WATER QUALITY SECTION
Dear Mr.Gleason:
Per our conversation with you,Mr.Mike Parker and Mr.Richard Bridgeman of your office and Mr.Tom Belnick
and Mr.David Goodrich of the Raleigh office on July 21,2003, a description of the proposed pilot test to reduce the
selenium concentration in the wastewater of the Allen Steam Station ash basin follows for your review and approval.
Currently stop logs have been added to block the discharge flow from the ash basin tower to Lake Wylie due to the
selenium concentration exceeding the 31 µg/L maximum daily limit on July 15,2003. The proposed pilot test
protocol to reduce the selenium concentration includes several options:
• Pump wastewater from the vegetated ash delta,where the selenium concentration is currently less than
3 µg/L,to the ash basin discharge tower(see line diagram)
• Add ferric sulfate at 100 gallons per 5 MGD of effluent upstream of the vegetated ash delta to enhance
precipitation of selenium(see attached line diagram and MSDS sheet),
• Possibly utilize the old ash basin for additional retention time and treatment in the vegetated deltas,
then pump back to the currently permitted ash basin discharge tower
Excavation of ash to form additional ash berms and increase the retention time within the ash basin is scheduled to
begin July 22,2003. Also preparations are underway to pump wastewater from the vegetated ash delta within the
ash basin,where the selenium concentration is currently less than 3 µg/L,to the ash basin discharge tower. The
additional proposed treatment options will be utilized as needed upon your approval. We anticipate completion of
the proposed pilot test by September 30,2003.
Since the ash basin is nearing the full pond elevation,your immediate review and approval of the suggested pilot test
options is requested. If you have additional suggestions or need to discuss further,please contact me(704)373-
3231 or Ron Lewis(704)373-5710.
Sincerely,
Michael A.Ruhe,Manager
Environmental Support
Attachments
cc: Mr.David Goodrich,NCDENR-Raleigh
www.duke-energy.corn

Old Yard ALLEN STEAM STATION
Ash Sumps ASH BASIN
Tower
Pump from Ash Delta to Tower
�,nischarge
•"' - Tower
• Vegetated it--______
li Ash Delta
. .
.•
. it•-___________ I\ ------------)....:, \
Add FeSO4 4-------
\\--\
1 \
to• --_____i,
Vegetated Ash Berm
Units 4 & 5 \ :\'' /t
Pump Ash Sluice 1 •,.,
to Old •
Ash ••.....................
.
Basin :
Vegetated Vegetated •
Deltas Ash Delta :•
(Drainage •
area of 65 i/
acres)
•
•
•
. •
\t •.............••'
Units 1, 2, & I
3 Ash Sluice

U7/21/03 NON 16:07 FAX [phone] ALLEN ADMIN OFF U1 001
c425)889-4100 7/21i2oo3 1i :'39 PAGE 1/5
** Material Safety Data Sheet **
Uairai'USA toe.
6100 Carillon Point
Kirkland,WA 28033
USA UfiVAR
yVW W.WIIVaRIS1.4om
Date 07/21 f03
To DUKE ENERGY CORP
mirk ROBIN JOLLY
Fax 1704-S29-2370
From MARSHALL GONE al UNIVAR USA
tax rfirect
Total pages(incl.this ono) 5
sub(cci/your rotcrcnco MSDS—FERRIC SULFATE 50%
E-mail direct telephone direct Kiridand,WA 00033
A
For emergency assistance involving chemicals,call CHEMTREC-[phone]
** Material Safety Data Sheet **
•

• 0'7/21/03 NON 16:07 FAX [phone] ALLEN ADMIN OFF 1002
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006 09/14/00 FERRIC SULFATE 50%
PRODUCT NAME: FE-3 - FERRIC SULFATE 50%
MSDS#: P16973V'S
DATE ISSUED: 10/98
SUPERSEDES: NEW
ISSUED BY: 006700
Manufacturer's Name: Fe-3, Inc_
Business Rt. 289 North
Celina, Texas 75009
Regular Telephone No_ 1 (972) 382-2381
Emergency Telephone No_ (800) 424-9300
•
Trade Name: Fe 3
Synonyms: FERRIC SULFATE SOLUTION
Shipping Name: DOT: CORROSIVE LIQUID, N.O.S. CORROSIVE MATERIAL
(LIQUID FERRIC SULFATE - 50% WATER NA 1760)
II_ HAZARDOUS INGREDIENTS
Material or Component (Typical) Cas No. % w/w
Ferric Sulfate 10028-22-5 49.0
Hazard Data: Product is toxic orally, is corrosive to the eye, and will
burn the skin.
Free Sulfuric Acid 7664-93-9 .5-1. 0
Water (balance of formulation)
Aquatic toxicity: Ferric sulfate is listed as toxic to aquatic life,
Category C. 40 CFR Parts 116-118_
III. PHYSICAL DATA
Boiling Point: 750 mm hg: Approx. 212 deg F
Freezing Point: Does not freeze at 0 deg F
Specific Gravity (U20=1) : 1.400 to 1.455
Vapor Pressure: NA
Vapor Density (Air=1) : NA
Solubility in H2O$ by Wt_ : Infinite
% Volatiles by Vol_ : NA
Evaporation Rate (Butyl Acetate = 1)
Appearance and Odor: Red-Brown solution. No detectable odor.
Ph (as is) Approximately: 1.0
Ph (1% soln) Approximately: 4.8
IV. FIRE AND EXPLOSION DATA
Flash Point (Test Method) : N.A.
Autoignition Temperature: N.A.
Flammable Limits in Air, % by Vol. : Lower N.A. Upper N.A.
Extinguishing Media: Product does not burn or support flame. If product is
present in a fire, water, CO2 or dry chemical may be used_ Product is
highly acidic and if in open container avoid splashing.
Special Fire Fighting Proc. : Do not allow product or water containing
product to enter a navigable stream_ At temperatures above 600 deg C,
product decomposes to iron oxide and surfer trioxide.
Unusual Fire & Explosion Hazard: None known_
V_ HEALTH HAZARD INFORMATION

, • 07/21/03 NON 16:07 FAX [phone] ALLEN ADNIN OFF a 003
HEALTH HAZARD DATA
Route of Exposure: Inhalation
Hazard Classification L Not determined, but expected to be low due to
other toxicological tests physical and chemical characteristics.
Basis for Classification: NA
Source: NA "
Route of Exposure: Skin Contact
Skin Contact: Not a primary skin irritant by FHSA standards
Basis for Classification.:-Primary dermal irritation index • 0.0 for 24
and 72 hours. -
Source: Laboratory test in accord with FHSA procedure.
Route of Exposure: Skin Absorption
Skin Absorption: Not toxic dermally by FHSA standards
Basis for Classification: Est. dermal LD50 (Rabbit)= (Male) Greater than
2.0 g/kg body weight (Female) Greater than 2.0 g/kg body weight.
Source: Laboratory test in accord with FHSA procedure.
Route of Exposure: Eye Contact
Hazard Classification: Corrosive to the eye by FHSA standards.
Basis for Classification: Eye irritation Scores:
24 hours 45.2
48 hours 56.2
72 hours 56.3
7 days 63.4
Source: Laboratory test in accord with FHSA procedure.
Route of Exposure: Ingestion
Hazard Classification: Toxic by FHSA standards.
Basis for Classification: Oral LD50 (Rats-male) = Between 2.5 and 5.0 g/kg
body weight. (Rat-female) = Between 2.5 and 5.0 g/kg body weight.
Source: Laboratory tests accord with FHSA procedure.
EFFECTS OF OVEREXPOSURE:
Acute Overexposure: None known except as listed in Section V above.
Chronic Overexposure: None known except as listed in Section V above.
EMERGENCY AND FIRST AID PROCEDURES
EYES Immediately irrigate with large amounts of water for at least 15
minutes. Hold eyelids apart during irrigation. Send patient to a physician
immediately.
SKIN Flush with water while removing clothing and shoes. Continue to flush
for at least 15 minutes. Call a physician. Wash clothes before reuse.
INHALAATION Remove from area and give artificial respiration if needed and
seek medical assistance.
INGESTION Treat as a corrosive liquid. Drink large quantities of water or
milk to reduce concentration and neutralize acid. Do not induce vomiting.
Call physician immediately.
VI. REACTIVITY DATA
•
CONDITIONS CONTRIBUTING TO INSTABILITY:
None Known.
INCOMPATIBILITY:
Product solution is corrosive to mild steel, copper, copper alloys and
galvanized steel. May be corrosive to paints, enamels, and concrete.
Reacts with lime and other basic materials to form insoluble iron salts_
HAZARDOUS DECOMPOSITION PRODUCTS:

• 07/21/03 NON 18:08 FAX [phone] ALLEN ADMIN OFF 0 004
+ None normally. At temperatures above 600 deg C, sulfur trioxide may ne
released.
CONDITIONS CONTRIBUTING TO HAZARDOUS POLYMERIZATION:
None known.
VII. DISPOSAL•, SPILL OR LEAK PROCEDURE:
AQUATIC TOXICITY (e.g., 96 HR. TLM) :
No data is known to be available. EPA has rated ferric sulfate in Category
C in the Waters Program hazardous substance list in 40 CFR Parts 116-118.
WASTE DISPOSAL METHOD:
Neutralize with lime, soda ash, or bicarbonate and remove to approved
landfill.
STEPS TO BE TAKEN IF MATERIAL IS RELEASED OR SPILLED:
Prohibit product from running into streams or navigable waters. Neutralize
and remove approved landfill. Wash down spill area with water. Check with
waste treatment plant before flushing down large amounts of spilled
product.
NEUTRALIZING CHEMICALS:
Lime (calcium carbonate, calcium hydroxide, calcium oxide), soda ash or
sodium bicarbonate.
VIII. SPECIAL PROTECTION INFORMATION:
VENTILATION REQUIREMENTS:
No special ventilation is believed to be necessary under normal use
conditions.
SPECIFIC PERSONAL PROTECTION EQUIPMENT:
RESPIRATORY:
None known necessary under normal use. If mists occur, or may occur, use a
respirator having an activated carbon filter suitable for sulfuric acid
mists.
EYE:
Chemical goggles should be worn when handling this product as it is
corrosive to the eye.
GLOVES
Chemical or rubber gloves should be worn.
OTHER CLOTHING AND EQUIPMENT:
Acid resistant clothing is recommended. Safety shoes are recommended when
handling product in drums.
IX. SPECIAL PRECAUTIONS:
PRECAUTIONARY STATEMENTS:
Product is corrosive to mild steel and containers should bear a corrosive
D.O.T. label.
•
OTHER HANDLING AND STORAGE REQUIREMENTS:
Liquid Ferric Sulfate solution is corrosive to mild steel. Storage and
equipment materials should include fiberglass, reinforced plastics,
plastics, rubber, lead, type 304 or better grades of stainless steel.
ADDITIONAL REGULATORY CONCERNS:
FEDERAL:

•� 07/21/03 NON 16:08 FAX [phone] ALUM ADMIN OFF 10 005
• 44 FDA: •
USDA:
CPSC:
TSCA: Is this product, or all its ingredients, being certified for
inclusion on the Toxic Substances Control Act inventory of chemical
substances? YES.
OTHER: The ferric sulfate meets the AWWA standard for Ferric Sulfate in
potable water. Standard•AWWA B406-87.
STATE: •
OSHA: Product is a hazardous material as defined by 29 CFR Paragraph 1910,
1200 because it is corrosive to the eye. Product is not listed by the
National Toxicology Program, the International Agency for
Research on Cancer, nor the Registry of Toxic Effects of Chemical
Substances (1981-82) as a carcinogen or potential carcinogen.
SARA TITLE III: Product contains the following listed toxic chemicals
which are subject to the reporting requirements of Section 313 of Title
III of the Superfund Amendments and Reauthorization Act of
1986 (SARA TITLE III) and 40 CFR, Part 372.
Listed Toxic Chemical CAS# Max % By Wgt.
Sulfuric Acid 7664-93-9 .5
FOR ADDITIONAL INFORMATION
CONTACT: MSDS COORDINATOR UNIVAR USA INC.
DURING BUSINESS HOURS, PACIFIC TIME [phone]
NOTICE
*********** UNIVAR USA INC ("UNIVAR") EXPRESSLY DISCLAIMS
ALL EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, WITH RESPECT TO THE PRODUCT OR INFORMATION PROVIDED HEREIN,
AND SHALL UNDER NO CIRCUMSTANCES BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES.**
DO NOT USE INGREDIENT INFORMATION AND/OR INGREDIENT PERCENTAGES IN THIS MSDS
AS A PRODUCT SPECIFICATION. FOR PRODUCT SPECIFICATION INFORMATION REFER TO A
PRODUCT SPECIFICATION SHEET AND/OR A CERTIFICATE OF ANALYSIS. THESE CAN BE
OBTAINED FROM YOUR LOCAL UNIVAR SALES OFFICE_
ALL INFORMATION APPEARING HEREIN IS BASED UPON DATA OBTAINED FROGS THE
MANUFACTURER AND/OR RECOGNIZED TECHNICAL SOURCES. WHILE THE INFORMATION IS
BELIEVED TO BE ACCURATE, UNIVAR MARES NO REPRESENTATIONS AS TO ITS ACCURACY OR
SUFFICIENCY. CONDITIONS OF •USE ARE BEYOND UNIVARS CONTROL AND THEREFORE USERS
ARE RESPONSIBLE TO VERIFY THIS DATA UNDER THEIR OWN OPERATING CONDITIONS TO
DETERMINE WHETHER THE PRODUCT IS SUITABLE FOR THEIR PARTICULAR PURPOSES AND THEY
ASSUME ALL RISES OF THEIR USE, HANDLING, AND DISPOSAL OF THE PRODUCT, OR FROM
THE PUBLICATION OR USE OF, OR RELIANCE UPON , INFORMATION CONTAINED HEREIN.
THIS INFORMATION RELATES ONLY TO TEE PRODUCT DESIGNATED HEREIN, AND DOES NOT
RELATE TO ITS USE IN COMBINATION WITH ANY OTHER MATERIAL OR IN ANY OTHER
PROCESS.
* * * END OF MSDS * * *

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91 o North Main Street
Mooresville,- North Carolina 25115
Phone; 704/6E3-1699
• Fax; 704/653-6040
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Duke
ref r.
A Duke energy Company 7 Allen Steam Station
253 Plant Allen Rd.
vze
\I` Belmont, NC 28012
February 13, 2003 V (11
(/� =,ri
Mr. Rex Gleason
Water Quality Regional Supervisor
North Carolina Department of 3
Environment and Natural Resources
Mooresville Regional Office
919 North Main Street
Mooresville, NC 28115 1N 1�t% ,w,,,,,, a dl.V 1h.
Subject: Additional sanitary input
to existing treatment facility
Allen Steam Station
NPDES Permit No. NC0004979
Gaston County, NC
Dear Mr. Gleason:
Allen Steam Station proposes to add sanitary waste from a remote office trailer to the
existing waste treatment facility that discharges through permitted outfall 002. The
treatment facility currently accepts sanitary waste from our plant system with
approximately 150 people responsible for the load on the system. The proposed addition
of an 8-10 person load would increase the average flow to be treated from 4850 GPD to
5130 GPD.
Monitoring requirements at Outfall 002 currently includes Fecal Coliform and BOD.
Per my conversation with Mike Parker on 1/8/2003, this correspondence should serve as
notification until changes are incorporated in the next permit renewal due in May 2005.
If you need further information please contact me at [phone].
Sincerely,
(90144.4L ef7 catort)---
Donald L. Scruggs
Environmental Coordinator
cc: Mike Parker- NCDENR- Mooresville Regional Office

Gplii90 l,
Michael F.Easley,Governor
2, 'n,- William G.Ross,Jr.,Secretary
> j LAW".": _{ North Carolina Department of Environment and Natural Resources
Alan i isKli n .P.E., Qualor
ity
Division of Water Quality
April 9, 2003
Mr. Michael A. Ruhe
Duke Energy Corporation
P.O. Box 1006 (EC 11 E)
Charlotte, NC 28201-1006
Subject: Notice of Violation Rescission
Plant Allen Steam Station
NPDES Permit No. NC0004979
Gaston County
Dear Mr. Ruhe:
A Notice of Violation(NOV) dated March 4, 2003 was issued for several perceived
effluent Temperature daily maximum limitation violations occurring during October 2002 at
Outfall 001 of the subject facility.
This Office is now aware that the Temperature limitation in the renewed permit, issued
effective :CO2, was intended to be as 'An the previous permit, which was a monthly average
limitation, rather than a daily maximum limitation. It is our understanding that the permit is to be
modified to clarify the limitation;therefore, the NOV is hereby rescinded. By copy of this letter,
this Office is requesting that our Raleigh Office remove the subject NOV from your file.
Should you have any questions on this matter, please do not hesitate to contact Richard
Bridgeman or me at 704/663-1699.
Sincerely,
4 R_i, I/
D. Rex Gl ason, P.E.
Water Quality Regional Supervisor
cc: Point Source Compliance/Enforcement Unit
RMB
H:\word\letters\Duke-Plant Allen.NOV Rescission.doc _
11
NCDEMK
Mooresville Regional Office,919 North Main Street,Mooresville,NC.28115
PHONE [phone] Customer Service
FAX [phone] 1 800 623-7748
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IDuke FOSSIL AND HYDRO GENERATION
rI Power® t
A Duke Energy CompanyDuke Power
P.O. Bo 10C6
Charlotte,
, NC 28201-1006
March 21, 2003
Mr. Richard Bridgeman
North Carolina Department of Environment and Natural Resources ;;Lite I.ua ENVIRuidpAtia
Mooresville Regional Office AND NATURAL REsoURCEs
919 North Main Street n00RESVI1I c°"c+ONAL OFFICE
Mooresville, NC 28115 i -¢
i
Subject: Notice of Violation - Effluent Limitations MAR 2 4 2003
Duke Power Company
Plant Allen Steam Station
NPDES Permit No. NC0004979
Gaston County -Ty cFPIr '
Mr. Bridgeman
This letter is to inform you that Duke Power is presently working with NCDENR-DWQ to
resolve a Notice of Violation (NOV) - Effluent Limitation dated March 4, 2003 received
on March 7, 2003 from your office.
Duke Power feels the NOV was issued in error due to an inadvertent omission of an
asterisk by the State on the limitation page A. (1) Effluent Limitations and Monitoring
Requirements for outfall #001. The asterisk in previous permits identified the
temperature limit for the effluent as a monthly average. The asterisk refers to a footnote
that states the "*Temperature shall not exceed 35°C (95°F) during the period October 1-
May 31 and 38.9°C (102°F) during the period June 1-September 30." The October,
2002 monthly average for Plant Allen's Outfall #001 effluent was 89°F, which was in
compliance.
Please direct any correspondence or questions concerning this issue to John Mease at
704-372-3946.
Sincerely,
1/1^11/41/( Cl Ait-e-
Michael A. Ruhe, Manager
Environmental, Health and Safety
Fossil-Hydro Generation
cc: Natalie Sierra - NCDENR - Raleigh, NC
www duke-energy.corn

riPlid)
Duke FOSSIL AND HYDRO GENERATION
Power®
A Duke Energy Company Duke Power
P.O. Box 1006
Charlotte, NC 28201-1006
NC CEP _ ntcNT
AND NATURAL RESOURCES
April 29, 2003 • MOORESVILLE REGIONAL OFFICE
prr rtfrn
MAY 0 7 2003
Ms. Natalie Sierra
NC Dept of Environment and Natural Resources
Division of Water Quality _
1617 Mail Service Center 'LA
Raleigh, NC 27699-1617 WATER Otmord.. 1C .0N
Subject: NPDES Permit Thermal Modification
Allen Steam Station - NC0004979
Gaston County
Dear Ms. Sierra:
Duke Power requests a modification to the effluent thermal limit for Ouffall 001. During the last
permit renewal, the asterisk which identified the effluent temperature limit as a monthly average was
inadvertently omitted. The asterisk refers to a footnote that states the "*Temperature shall not exceed
35°C (95°F) during the period October 1-May 31 and 38.9°C (102°F) during the period June 1-
September 30." Duke Power request, the table on limitation page A.(1.) be changed to the following:
i ENT `, ', e — -LIMITS �. :.� = MONITORING REQUIREMENTS 's._ `1-, '0
HARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow Daily Pump Logs Effluent
Temperature Grab or
June 1 -September 30 38.9°C(102°F) Daily Instantaneous Effluent
Temperature Grab or `
October 1 -May 31 35°C(95°F) Daily Instantaneous Effluent
By using the above table, the asterisk statement in footnote number one can be eliminated. If you
need additional information or have questions concerning this modification, please contact John
Mease at (704) 382-39.46.
Sincerely,
PI (-;(.4144., Ok fit.4<,
Michael A. Ruhe, Manager
Environmental Support
cc: Richard Bridgeman — Mooresville Regional Office
• www.duke-energy.corn

•
J.R. Mease:
bc: D.L. Scruggs -Allen
T.D. Ervine—EC11 E
M. S. Hays—EC11
File Number: 404.110.01 (Plant Allen)
Certified Mail: 7002 0860 0006 5842 9476

/03 14: 11 r .$704 382 6240 DPCO ENV ENGR Z001
DukeTECHNICAL SERVICES
1. dir En ergysm P.a Box 1006
Charlotte, NC 28201-1006
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9

A. (). EFFLUENT LIMITATION'S AND MONITORING REQUIREMENTS FINAL Permit No, NC0004979
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:
Etfluent Characteristic' lbslda Discharge Limitations Monitoring Requirements
X Units (specify) Measurement Sample 'Sample. N
Mon. Avg. Daily Max Mon. Avg, pally Max. Frequency Type Location
Flow Deily Pump Logs or E pD
Temperature"' Daily Grab E
4t
N
N
`c
0
* Sample locations:E - Effluent,
**Temperature shall not exceed 35 °C (95 °F) during the.period October 1 through May 31 and 38.9 °C (102.0 °F) during the period June 1
through September 30,
*** 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,
Chlorination of the once through cooling water, discharged through outfall 001, is not allowed under this permit. Should Duke Power wish to
chlorinate its once through cooling water,a permit modification must be requested and received prior to commencing chlorination.
0
O

/03 14: 12 f2704 382 6240 DPCO ENV ENGR4 i c vA 6, F 002
State of North Carolina
''v
Department of Environment,
4,Health and Natural Resources ` .
Division of Environmental Management
James B. Hunt, Jr., Governor AillamillIMNIMMIL
Jonathan B. Howes, Secretary FJ Ft
A. Preston Howard, Jr., P.E., Director
August 11, 1995 rlG ' r ', ' ';i F1 r.•, .,
Mr.John Carter,Technical Systems Manager L� i 5 1995
Dukc Power Company �,
Electric System Support Department
13339 Hagers Ferry RoadLE
'�`�.:r ii �!i i 1-
Huntexsville,North Carolina 28078-7929
Subject: NPDES Permit Modification [J COPY
NPDES Permit No. NC00049 9
Duke Power Company
Allen Steam Station C ROUTE
Gaston County
Dear Mr.C:uler.
In accordance with your permit modification application received'on July 26, 1994, we are forwarding herewith the
modified subject state - NPDES permit. You requested that outfall 001 be Subject to a monthly average [hernial limit as bad
been included in previous permits instead of the daily average thermal limit included in the permit issued March 9, 1995. We
have evaluated your request and concur that a monthly average thermal limit is appropriate,
Please find enclosed amended outfall 001 effluent limitations and monitoring requirements page:which should be inserted
into your permit. The old page should be discarded.All other terms and conditions contained in the original permit remain
unchanged and in full effect- These permit modifications arc issued pursuant to.the requirements of North Carolina General
Statutes 143-215.1 and the Memorandum of Agreement between North C:imliha and the U. S. Environmental Protection
Agency.
If any of the modified parts,measurement frequencies or sampling requirements'eontained in this penrut 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.
If you nave any questions concerning these permit modifications, please contact Dana Bolden at telephone number
919/733-5083, extension 518.
Sincerely yours, 444 -
A. L / 7 Preston Howard, Jr., P.E.
lir/
cc Central Files
Mooresville Regional Office
Permits and Engineering Unit
Facilities Assessment Unit
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

„tict,..i
aF �v iF
÷. QG Michael F.Easley
Govemor
ik
> William G.Ross,Jr.,Secretary
C .0 North Carolina Department of Environment and Natural Resources
Alan W.Klimek,P.E.,Director
Division of Water Quality
March 4, 2003
CERTIFIED MAIL
RETURN RECEIPT REQUESTEDMr. 7001 2510 0004 8287 7927
q Michael g287 7qZ t
- 70r31 m
i1 .%ITC
O
t f
c m' o
.4o_ 0� ;s. 4 N 1 , Atice of Violation-Effluent Limitations
-75
C. d T $� co int Allen Steam Station
•O r DES Permit No. NC0004979
rn0 r' ton County
t..o) w ., (..1 el %
N�O ”
r) ilitoring report for the subject facility revealed violations of
O 5- 11 \ a
Sds
IC) � i
'' '
as L ! Reported Value Limit
N l m t : . 96°F 95°F FIN
�,, O 97°F 95°F FIN
j� 99°F 95°F FIN
Yw+ 100°F
95°F FIN
_t,.,,arure 98°F 95°F FIN
Temperature 98°F 95°F FIN
Remedial actions, if not already implemented, should be taken to correct any problems. The
Division of Water Quality may pursue enforcement actions for these and any additional violations. If the
violations are of a continuing nature, not related to operation and/or maintenance problems, and you
anticipate remedial construction activities,then you may wish to consider applying for a Special Order by
Consent. You may contact Richard Bridgeman of this Office for additional information.
If you have questions concerning this matter,please do not hesitate to contact Mr.Richard
• Bridgeman or me at 704/663-1699.
Sincerely, ci,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
cc: Point Source Compliance/Enforcment Unit
RMB
AilVA Customer Service Mooresville Regional Office,919 North Main Street,Mooresville,NC 28115 PHONE [phone]
• ,11CDEN,it 1 800 623-7748FAX [phone]

O� N1 A T � micnael F.basley,Governor
Q William G.Ross Jr.,Secretary
y North Carolina Department of Environment and Natural Resources i
Alan W.Klimek,P.E.,Director V
♦-c Division of Water Quality
At' (-V?illiS
August 12,2002
Mr. Michael Rhue,Manager Water Protection
Duke Engery Corporation
13339 Hagers Ferry Road
Huntersville,North Carolina 28078-7929
Subject: Compliance Biomonitoring Inspection
Duke Power Allen Steam Station
NPDES Permit No.NC0004979
Gaston County,NC
Dear Mr.Rhue:
Enclosed is a copy of the toxicity test results relative to the inspection conducted at the
subject facility on August 2, 2002 by John Lesley of this Office. Effluent Samples were collected
on August 2 and 5, 2002 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(704) 663-1699.
Sincerely,
k, D. Rex Gleason,P.E.
Water Quality Regional Supervisor
Enclosure
cc: Central Files
Kevin Bowden,Aquatic Toxicology Unit
Gaston County Health Department
A
NCDENR
N.C.Division of Water Quality 919 North Main Street,Mooresville NC 28115 Phone[phone]
FAX [phone]

Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Page 2
Whole effluent samples were collected on August 2 and 5, 2002 by John Lesley of this
Office 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 Lake Wylie Creek (7Q10 of
95.0 CFS). The test using these samples resulted in a pass. Toxicity test information follow :
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentration 16% sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 23.7 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 23.4 neonates
First Sample pH 5.94 SU
First Sample Conductivity 184 micromhos/cm
First Sample Total Residual Chlorine <0.030 mg/1
Second Sample pH 6.11 SU
Second Sample Conductivity 185 micromhos/cm
Second Sample Total Residual Chlorine <0.030 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 NC DEPT.or E 1"ro•!or-:s
v -Aquatic Toxicology Unit
J NOOREs
August 6, 2002
AUG 0 8 2002
MEMORANDUM
To: Rex Gleason
Water Quality Supervisor,MRO ' .
Through: Matt Matthews yr,rr
Supervisor, Aquatic Toxicology Unit
From: Sandy Mor
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 30 and August 2, 2000 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 23.7 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 23.4 neonates
First Sample pH 5.94 SU
First Sample Conductivity 184 micromhos/cm
First Sample Total Residual Chlorine <0.0300 mg/L
Second Sample pH 6.11 SU
Second Sample Conductivity 185 micromhos/cm
Second Sample Total Residual Chlorine <0.0300 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

WA7'F
9 ovMichael F.Easley
„\ QG Governor
William G.Ross,Jr.,Secretary
Department of Environment and Natural Resources
'C Gregory J.Thorpe,Ph.D.,Acting Director
Division of Water Quality
February 13, 2002
Mr. John C. Bailey, Director
Property Tax Division
Department of Revenue
P.O. Box 871
Raleigh, North Carolina 27604
Subject: Tax Certification
No.TCS-MV-025
Wastewater Treatment/
Abatement Facilities
Duke Power
Allen Steam Station
NPDES No.NC0004979
Gaston County, NC
Dear Mr. Bailey:
Attached is Tax Certification No. TCS-MV-025, covering the
operation of wastewater treatment facilities as specified in the
permit application and subject NPDES Permit issued by the North
Carolina Division of Water Quality (NCDWQ) .
Duke Power, may use this Certification to obtain tax
benefits in keeping with the appropriate Statutes . A detailed
description of these treatment facilities is available in the
files of NCDWQ.
Sincerely,
i~ ?t,
D. Rex Gleason, P. E.
Water Quality Regional Supervisor
NUIENR
Customer Service Division of Water Quality 919 North Main Street Mooresville,NC 28115 Phone [phone]
1 800 623-7748 Fax [phone]

Owo W f1T 9 Michael F.Easley
QG Governor
William G.Ross,Jr.,Secretary
Department of Environment and Natural Resources
< Gregory J.Thorpe,Ph.D.,Acting Director
Division of Water Quality
•
February 13, 2002
•
Ms. Kathryn Tronsberg
Senior Manager, Financial Advisory Services Group
Deloitte & Touche LLP
Valuation Group
2500 PPG Place
Pittsburgh, Pennsylvania 15222-5401
SUBJECT: Tax Certification
No.TCS-MV-025
Wastewater Treatment Facilities
Duke Power
Allen Steam Station
NPDES No.NC0004979
Gaston County, North Carolina
Dear Ms. Tronsberg:
Attached are two (2) copies of Tax Certification Number TCS-
MV-025, covering the operation of wastewater treatment facilities
as specified in the subject NPDES Permit issued by the North
Carolina Division of Water Quality.
The Company may use this Certification to obtain tax
benefits in keeping with the appropriate Statutes .
Sincerely,
D. Rex Gleason
Water Quality Regional Supervisor
Attachment
cc:Gaston County Health Department
NuutNR
Customer Service Division of Water Quality 919 North Main Street Mooresville,NC 28115 Phone [phone]
1 800 623-7748 Fax [phone]

DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
TAX CERTIFICATION
(Franchise/privilege; Amortization; Property)
In accordance with the provisions of the General Statutes of
North Carolina (G. S. 105-122 (d) , 105-130. 10, 105-147 (13) , 105-
275 (8) ) , this is to certify that:
Duke Power
Allen Steam Station
Gaston County
HAS BEEN ISSUED
NPDES Permit No. NC0004979 for the discharge from and the
operation of wastewater treatment facilities consisting of the
Following:
1-Ash basin system
2-Bottom & fly ash collection & sluicing system
3-Ash basin-stormwater run-off sump system
4-Ash basin-process wastewater sump system
5-Septic tank (discharging sanitary wastewater to the ash basin)
6-Waste oil/stormwater trap tanks
7-Groundwater remediation system
8-Pumps, piping and controls pertinent to the listed facilities
The wastewater treatment system is located at Duke Power
Company' s Allen Steam Station off NCSR 2525, South of Belmont in
Gaston County. Treated effluent is discharged into the Catawba
River.
The Environmental Management Commission and the Department of
Environment and Natural Resources have found the treatment
facilities:
a. Have been constructed or installed;
b. Comply with the requirements of the Commission;
c. Are being effectively operated in accordance with the
terms and conditions of the Permit, Certification of

Page Two
Duke Power
Tax Certification
Approval, or other document of approval issued by the
Commission; and
d. Have as their primary rather than incidental purpose
the reduction of water pollution resulting from the
discharge of wastewater.
Issued at Mooresville, North Carolina this the 13th day of
February, 2002 by the directive of the North Carolina
Environmental Management Commission and the North Carolina
Department of Environment and Natural Resources.
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Mooresville Regional Office
TCS-MV-025

Deloitte&Touche LLP
Valuation Group
2500 PPG Place
Pittsburgh,Pennsylvania 15222-5401 n�
Tel:[phone] w
Fax:[phone]
www.us.deloitte.com Deloitte
&Touche
RECEIVED
January 28, 2002
J A N 3 C 2002 CARS-02-113
NC DEPT OF ENVIRONMENT
AND NATURAL RESOURCES
MOORESVILLE REGIONAL OFFICE
Mr. Rex Gleason
Water Quality Supervisor
Department of Environmental and Natural Resources
Mooresville Regional Office
Division of Water Quality
919 North Main Street
Mooresville,NC 28115
Subject: Revised Request for Tax Exemption Certification of Qualifying Water Pollution
Control Equipment for Duke Energy Corporation d/b/a Duke Power Company
Dear Mr. Gleason:
Over the course of the past several weeks, Deloitte & Touche LLP ("D&T") has been engaged in
several conversations with Mr. Samar Bou-Ghazale of the Division of Water Quality concerning
Duke Power Company's ("Duke Power's") application for tax exemption certification, dated
December 17, 2001, for qualifying water pollution control equipment currently installed at the
Allen Steam Station(the "Plant").
At Mr. Bou-Ghazale's request, a meeting was held at the Plant to discuss the installed systems
and determine which systems qualify for tax exemption certification pursuant to North Carolina
General Statute (NCGS) §105-275(8). The meeting, held on January 16, 2002, was attended by
Ms. Kathryn Tronsberg and Mr. Robert Morgan of D&T, Mr. Don Scruggs of Duke Power, and
Mr. Samar Bou-Ghazale of the Division of Water Quality.
During this meeting, Mr. Scruggs and Ms. Tronsberg used an aerial view of the Plant's water
discharge outfall locations, as well as the Plant's Water Use Schematic (see Attachment) to
illustrate to Mr. Bou-Ghazale the various wastewater flows throughout the Plant systems. Based
upon feedback from Mr. Bou-Ghazale during the meeting, as well as subsequent telephone
conversations, we have developed an understanding of the systems that qualify for tax exemption
certification and, at his request, are submitting a modified application requesting tax exemption
certification on Duke Power's behalf. The qualifying systems, as detailed below, include waste
disposal systems, which are "[R]eal and personal property that is used...exclusively for...waste
disposal..." [NCGS §105-275(8)].
Deloitte
Touche
Tohmatsu

January 28, 2002 CARS-02-113
Page 2
Please amend Duke Power's original request for tax exemption certification to include the
following waste disposal system descriptions for tax exemption certification purposes based
upon the verbal understandings reached between Mr. Bou-Ghazale and our office:
I. Ash Basin System:
Installed components of the Ash Basin System include the detention basin and ash basin
treatment systems consisting of the carbon dioxide injection system, acid injection system, and
sodium hydroxide injection system.
II. Bottom & Fly Ash Collection & Sluicing System:
Installed components of the Bottom & Fly Ash Collection & Sluicing System include the piping
and collection systems, vacuum separating equipment, surge/transfer tank, pressure systems,
sluicing equipment, and related piping, valving, instrumentation, and controls.
III. Ash Basin—Stormwater Run-off Sump System:
Installed components of the Ash Basin—Stormwater Run-off Sump System include the coal yard
sump, coal handling sumps, overflow equipment, pumps, and related piping, valving,
instrumentation, and controls.
IV. Ash Basin—Process Wastewater Sump System:
Installed components of the Ash Basin — Process Wastewater Sump System include the yard
drain sump, boiler room sumps, turbine room sumps, power house sump, concrete sump
structure, overflow equipment, pumps, and related piping, valving, instrumentation, and controls.
V. Sanitary Waste Septic Treatment System:
Installed components of the Sanitary Waste Septic Treatment System include the septic tank and
related piping, valving, instrumentation, and controls.
VI. Waste Oil/Stormwater Trap Tanks:
Installed components of the Waste Oil / Stormwater Trap Tanks include the waste oil /
stormwater trap tanks and related piping, valving, instrumentation, and controls.
VII. Groundwater Remediation System:
Installed components of the Groundwater Remediation System include the waste oil separator,
storage equipment, and related piping, valving, instrumentation, and controls.
We have prepared these system descriptions in anticipation of their use within the Division of
Water Quality's exemption certification documentation. Please contact me if our representations
differ from Mr. Bou-Ghazale's understanding of the agreed upon system components eligible for
pollution control tax exemption certification.

January 28, 2002 CARS-02-113
Page 3
Please send one copy of the completed tax exemption certificate for the Plant systems above to
the following addresses:
Kelly J. Voelkel, CMI
Director, Property Tax Division
Duke Power Company
5400 Westheimer Ct.
Houston, TX 77056-5310
Kathryn Tronsberg
Senior Manager, Financial Advisory Services Group
Deloitte & Touche, LLP
2500 One PPG Place
Pittsburgh, PA 15222-5401
Should you have any further questions concerning this application for tax exemption
certification, please contact me at(412) 338-7822.
Very truly yours,
L
K n ronsberg
S nior Manager, Financial Advisory ices Group
Attachment
cc: Samar Bou-Ghazale (DENR-Division of Water Quality)
Kelly Voelkel (Duke Energy -Houston)
Don Scruggs (Duke Power - Allen Steam Station)
Jeff Binkley (Deloitte & Touche - Atlanta)

%"
Plant Allen Water Use Schematic NPDES# NC0004979
Gaston County
Condenser 001
Cooling
Water
A E
D
M Misc. Equip.
Cooling and ) 0�
Seals o
Water A m. Coal Handling Sanitary
Treatment Sumps Waste
G i H Stormwater(2)
V Q
L J Boiler
V i
ON-
CATAWBA A Service Stormwater(1) Coal Yard TNW Ash 002
RIVER ) Water 1. ., Sump Basin_i_______ A ' _�
K Turbine Room u Yard Drainage
--ON---ON- Sump X
. 'N Sumps
Boiler Room R
-- Sumps
c
Intake P s
Screen V
Backwash Ash 1
Sluicing
y Clamtrap 004
— Filter
B Backwash O 005
Permanent Lines
Temporary Lines

Duke Duke Energy Corporation
CO Energy. -p-. FN.-MOMENT Energy Center
a„ �� P.O.Box 1006
r,;..t�lip Charlotte,NC 28201-1006
February 11, 2002 .�
Ms. Coleen Sullins FEB 1 5 2002
North Carolina Department of Environmental,
Health and Natural Resources
Division of Water Quality
1617 Mail Service Center �q
Raleigh, NC 27699-1617 a +t{ �` • ��' Sf, CT1O
SUBJECT: Delegation of Authority-Signatures on Reports and Requested Information
Duke Energy Corporation
Fossil, Hydro and Combustion Turbine -
NPDES Permitted Stations
Notification of Address Change
Dear Ms. Sullins:
1
Federal Regulation 40 CFR 122.22, as well as Part II of Duke Energy's NPDES permits, specifies
that all reports required by NPDES permits and other information requested by the permit issuing
authority shall be signed by a principal executive officer of at least the level of Vice President or a
duly authorized representative. I hereby authorize the following positions or the individual
currently acting in these positions: the Manager of North American Support (currently Mr. Michael
A. Ruhe) or the Director of Environmental, Health and Safety (currently Mr. Mark S. Hays) the
authority to sign all reports and requested information related to the permits specified in the
attached list, in addition to the Construction Stormwater NPDES General Permit (NCG010000) for
construction activities when this general permit is issued for one of the sites listed in the
attachment.
In addition, we request the State's databases be revised to reflect that all correspondence be
addressed to Mr. Michael A. Ruhe—Mail Code EC11 E, Duke Energy Corporation, P.O. Box 1006,
Charlotte, NC 28201-1006. This will prevent any delays of correspondence associated with
NPDES permits.
If you have questions or need additional information, you may contact Mike Ruhe at 704-373-
3231.
Sincerely,
-.: Iit"rirlA.
heodore . Brig t
Vice President
Fossil/Hydro Operations
Attachment
cc: Bradley Bennett, NCDENR, Raleigh, NC
David Goodrich, NCDENR, Raleigh, NC
Forest Westall, NCDENR, Asheville, NC
Resrrwlea a,.NCDENR, Mooresville, NC
Steve Mauney, NCDENR, Winston-Salem, NC

NPDES Permits Currently Held:
11111101 Steam Station-NCO004979'
Belews Creek Steam Station - NC0024406, WO0005873
Buck Steam Station - NC0004774
Cliffside Steam Station - NC0005088, NCG520067
Dan River Steam Station - NC0003468
Lincoln Combustion Turbine Station-NC0080781
Marshall Steam Station - NC0004987
V Riverbend Steam Station - NC0004961
Bridgewater Hydro Station- NCG500102
Cowans Ford Hydro Station-NCG500139
Lookout Shoals Hydro Station-NCG500120
Mountain Island Hydro Station - NCG500131
' Oxford Hydro Station- NCG500119
Rhodhiss Hydro Station- NCG500108
Tuxedo Hydro Station-N.CG500110
Bear Creek Hydro Station—NCG500124
Bryson Hydro Station—NCG500129
r Cedar Cliff Hydro Station--NCG500125
Mission Hydro Station—NCG500128
Nantahala Hydro Station—NCG500136
Tennessee Creek Hydro Station—NCG500123
Thorpe Hydro Station—NCG500127
Tuckaseegee Hydro Station—NCG500126

Deloitte&Touche LLP
Valuation Group
2500 PPG Place
Pittsburgh,Pennsylvania 15222-5401
Tel:[phone]
Fax:[phone]
www.us.deloitte.com Deloitte
&Touche
RECEIVED
JAN 3 0 2002
January 28, 2002 CARS-02-113
NC DENPT OF ENVIRONMENT
AND NATURAL RESOURCES
MOORESVILLE REGIONAL OFFICE
Mr. Rex Gleason
Water Quality Supervisor
Department of Environmental and Natural Resources
Mooresville Regional Office
Division of Water Quality
919 North Main Street
Mooresville,NC 28115
Subject: Revised Request for Tax Exemption Certification of Qualifying Water Pollution
Control Equipment for Duke Energy Corporation d/b/a Duke Power Company
Dear Mr. Gleason:
Over the course of the past several weeks, Deloitte & Touche LLP ("D&T") has been engaged in
several conversations with Mr. Samar Bou-Ghazale of the Division of Water Quality concerning
Duke Power Company's ("Duke Power's") application for tax exemption certification, dated
December 17, 2001, for qualifying water pollution control equipment currently installed at the
Allen Steam Station(the "Plant").
At Mr. Bou-Ghazale's request, a meeting was held at the Plant to discuss the installed systems
and determine which systems qualify for tax exemption certification pursuant to North Carolina
General Statute (NCGS) §105-275(8). The meeting, held on January 16, 2002, was attended by
Ms. Kathryn Tronsberg and Mr. Robert Morgan of D&T, Mr. Don Scruggs of Duke Power, and
Mr. Samar Bou-Ghazale of the Division of Water Quality.
During this meeting, Mr. Scruggs and Ms. Tronsberg used an aerial view of the Plant's water
discharge outfall locations, as well as the Plant's Water Use Schematic (see Attachment) to
illustrate to Mr. Bou-Ghazale the various wastewater flows throughout the Plant systems. Based
upon feedback from Mr. Bou-Ghazale during the meeting, as well as subsequent telephone
conversations, we have developed an understanding of the systems that qualify for tax exemption
certification and, at his request, are submitting a modified application requesting tax exemption
certification on Duke Power's behalf. The qualifying systems, as detailed below, include waste
disposal systems, which are "[R]eal and personal property that is used...exclusively for...waste
disposal..." [NCGS §105-275(8)].
Deloitte
Touche
Tohmatsu

January 28, 2002 CARS-02-1 13
Page 2
Please amend Duke Power's original request for tax exemption certification to include the
following waste disposal system descriptions for tax exemption certification purposes based
upon the verbal understandings reached between Mr. Bou-Ghazale and our office:
I. Ash Basin System:
Installed components of the Ash Basin System include the detention basin and ash basin
treatment systems consisting of the carbon dioxide injection system, acid injection system, and
sodium hydroxide injection system.
II. Bottom & Fly Ash Collection & Sluicing System:
Installed components of the Bottom & Fly Ash Collection & Sluicing System include the piping
and collection systems, vacuum separating equipment, surge/transfer tank, pressure systems,
sluicing equipment, and related piping, valving, instrumentation, and controls.
III. Ash Basin—Stormwater Run-off Sump System:
Installed components of the Ash Basin—Stormwater Run-off Sump System include the coal yard
sump, coal handling sumps, overflow equipment, pumps, and related piping, valving,
instrumentation, and controls.
IV. Ash Basin—Process Wastewater Sump System:
Installed components of the Ash Basin — Process Wastewater Sump System include the yard
drain sump, boiler room sumps, turbine room sumps, power house sump, concrete sump
structure, overflow equipment, pumps, and related piping,valving, instrumentation, and controls.
V. Sanitary Waste Septic Treatment System:
Installed components of the Sanitary Waste Septic Treatment System include the septic tank and
related piping, valving, instrumentation, and controls.
VI. Waste Oil/Stormwater Trap Tanks:
Installed components of the Waste Oil / Stormwater Trap Tanks include the waste oil /
stormwater trap tanks and related piping,valving, instrumentation, and controls.
VII. Groundwater Remediation System:
Installed components of the Groundwater Remediation System include the waste oil separator,
storage equipment, and related piping, valving, instrumentation, and controls.
We have prepared these system descriptions in anticipation of their use within the Division of
Water Quality's exemption certification documentation. Please contact me if our representations
differ from Mr. Bou-Ghazale's understanding of the agreed upon system components eligible for
pollution control tax exemption certification.

January 28, 2002 Page 3 CARS-02-113
Please send one copy of the completed tax exemption certificate for the Plant systems above to
the following addresses:
Kelly J. Voelkel, CMI
Director, Property Tax Division
Duke Power Company
5400 Westheimer Ct.
Houston, TX 77056-5310
Kathryn Tronsberg
Senior Manager, Financial Advisory Services Group
Deloitte & Touche, LLP
2500 One PPG Place
Pittsburgh, PA 15222-5401
Should you have any further questions concerning this application for tax exemption
certification,please contact me at [phone].
Very truly yours, F____-_-,
i / ____L _.--...,
K n ronsberg
S nior Manager, Financial Advisory iSvices Group
Attachment
'gSAlltf'), I olAv° i - u I ;d, dIF,I ', ,k,? "x, II Hir.Tr1'r o'Ai H 1
Ke y oelkel (Duke Energy - Houston)
Don Scruggs (Duke Power - Allen Steam Station)
Jeff Binkley (Deloitte & Touche - Atlanta)

__._. .__.. ._.._ _ -....L. .. . -----
till
Plant Allen Water Use Schematic NPDES# NC0004979
Gaston County
Condenser
01
Cooling 0OD
Water
A E
D
M Misc.Equip.
Cooling and ) 0�
Seals o
Water A m. Coal Handling Sanitary
Treatment Sumps Waste
G i H Stormwater(2)
v o
L J Boiler
V i
► T
Stormwater(1) 002
CATAWBA A Service Sump ► Basin
RIVER ) Water . .. ►
lir i
K Turbine Room u Yard Drainage X
y .N Sumps —� . Sump
Boiler Roam s. R
4-
-- Sumps .%
c
V - •
Intake P S
• Screen VAshit
Backwash
Sluicing
. Clamtrap 00.004
— Fitter
MP
B Backwash 005
Permanent Lines
Temporary Lines

S\I\
CIDuke FOSSIL-HYDRO GENERATION
Power®
Duke Power
A Duke EnergyCompany
Pan Y EC11E/526 South Church Street
Charlotte, NC 28202-1802
MC�T.OF ENVIRONMENT
June 12, 2003 �TORAI RESO1JRCES
ESVILLE p,�r:!C��,q� OFFICE
Ms. Sonja Williams RFC
Mooresville Regional Office
North Carolina Department of Environment and Natural Resources (SUN 1 3 2nn S
919 North Main Street
Mooresville,NC 28115
Subject: Duke Power Company YEA '
Plant Allen '
NPDES Permit Number NC0004979
Dear Ms. Williams:
This letter fulfills the 5 day written notification requirement as stipulated by the NPDES permit Part
II, Section E. 6. a. On the evening of June 5, 2003, a leak was found in the yard drainage sump
discharge pipe at Plant Allen. The flow to this pipe was promptly isolated. The contents of the yard
drain sump was primarily once through cooling water based on the station operation. It is estimated
that 120,000 gallons of cooling water was released to the Catawba River from this leak. Mr. Richard
Bridgeman of your office was notified of this release on Friday June 6, 2003. Additional
notifications were made to the news media as required by House Bill 1160. No adverse impact to the
environment was observed.
Presently, the pipe is still isolated and under repair. Additionally, the cause of the leak is still under
evaluation. Duke Energy Corporation will notify you once the pipe is repaired. Until then the pipe
will continue to be isolated. If you need additional information or have questions please contact
either Robert Wylie at 704 382-4669 or Don Scruggs at 704 829-2423.
Sincerely,
Michael A. Ruhe, Manager
Environmental Support
www.duke-energy.corn

OP '
I T.4 tN.C. DEPT. or.NATUFZ E I:t?.1LTH
USEPA, Region IV OC
Compliance Branch 2 U 1995
345 Courtland Street, NE
Atlanta, GA 30365 DMSi0iJ 0�f ,fi► j�fr7
iiCOREStaE a
Gentlemen:
This letter is in response to concerns environmental professionals within the Environmental Division of Duke Power
Company have concerning a rogue manager, Mr. Michael Lascara, Manager of Environmental Protection, who in his zeal to
move up the corporate ladder and, according to his own boasting he will be a vice-president by the time he is 40, has
suppressed information about actual and potential violations of environmental laws at Duke Power fossil and generating
facilities.
One of these actual and potential violations include fossil facility ash basin discharges. The ash basins discharge
waters to the waterways of the US under the NPDES program. The discharges occur at discharge towers where the water
levels of the basins are controlled. The towers control the water level by the insertion of stop logs. These stop logs
cause the water in the basins to rise until water freely spills over the logs. The water that flows over the logs is
used for the NPDES monitoring point. However, the array of stop logs leak, causing millions of gallons of ash basin
discharge water to go unmonitored, contributing to underestimated flows and mass loadings of regulated pollutants
reported to regulatory agencies.
These incidents have been brought to the attention of Mr. Lascara by various personnel within the section, but he
refuses to address these concerns because of his vice-presidential aspirations. He does not want to draw attention to
controversial issues that may hinder his rise up the corporate ladder.
As most regulators in the Southeast are aware, Duke Power Company has been and continues to be a leader and model of
environmental protection programs both in the electric utility industry and in the areas of North and South Carolina
which it serves. This leadership has resulted in a commitment to protecting and enhancing the environment, and the
environmental professionals employed by Duke Power are as equally committed to ensuring that Duke Power facilities are
in compliance with all applicable rules and regulations. That is why we have written this letter. We are asking that
the EPA investigate these concerns.
Unfortunately we cannot sign this letter due to retribution, including terminat.on by Mr. Lascara. We would ask that
Mr. Lascara be relieved of his position as Manager of Environmental Protection until this situation is resolved
Thank you
.cc Mr. William Grigg, CEP, Duke Power Company
Mr. Richard Priory, President Duke Electric
Mr. James Grogan, Vice-President, Electrical System Support Department
Mr. James Hendricks, Manager, Environmental Division
NC DEHNR, Mooresville, NC Regional Office