NC0004979_Regional Office Historical File Pre 2018 (8)

DUKE
ENERGY.
October 9, 2019
Laserfiche
RECEIVEDINCDENR/DWR
OCT 10 2019
WOROS
MOORESVILLE REGIONAL OFFICE
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:
Allen Steam Station
253 Plant Allen Roao
Belmont, NC 28012
u 704 829 - 2857
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: 1 Z X67 601 24 9828 4247
Mooresville: 1 Z X67 601 24 9527 9651

O
D i
tl{
LEGEND a
SITE FEATURE
— ACTIVE ASH BASIN WASTE BOUNDARY
- — ASH BASIN COMPLIANCE BOUNDARY ( L
— - — RETIRED ASH BASIN WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE
_
BOUNDARY
RETIREDASH BASINASH LANDFILL
COMPLIANCE BOUNDARY
— - DORS FILLS BOUNDARIES
DUKE ENERGY CAROLINAS ALLEN STEAM
STATION SITE BOUNDARY
► STREAM (AMEC NRTR 2015)
WETLAND (AMEC NRTR 2015)
�., DUKE
NOTES:
ENERGY
ALL BOUNDARIES ARE APPROXIMATE
PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS
AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON
10
DECEMBER 13, 2018. AERIAL WAS COLLECTED ON MARCH 30, 2018
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA
synTerl�c
STATE PLANE COORDINATE SYSTEM FIPS 32001NAD831
a -
_:e-tee...
tl
t
e
37b �0 �._.....�4.,.3iS /50
GRAPHIC SCALE IN FEET
DRAWN BY: C. WYATT DATE: 10/01/2019
REVISED BY: C. WYATT DATE: 10/03/2019
APPROVED BY: L. DRAGO DATE: 10/03/2019
CHECKED BY: L. DRAGO DATE: 10/03/2019
PROGRAM MANAGER: C. SUTTEI.L
FIGURE 1
WASTE AND COMPLIANCE BOUNDARIES
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

AV E 31P W.
IV
44
V.
14 _;j
:"o lile
q-
A"
Ak
4e
OKA-
40 z
im.
41'
IL
A;e
Al
T Fe-
167
eA
CTI
kL

�> DUKE
!' ENERGY,
July23, 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
k�eil
rf1Che
James Wells
Vice President
Environmental, Health and Safety
Programs & Environmental Sciences
526 South Church Street
Charlotte, NC 28202
[phone]
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:
F-'r •-' ,rD/NCUENR/D,n/,.
,JUL 25 2019
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 517-009 (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 land 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

��� Laserfiche
ECEIVED/NCDENR/DWR
ENERGY.
JAN 2 i 7`119
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:
Allen Steam Station
253 Plant Allen Road
Belmont, NC 28012
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].
l certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.
Sincerely,
&^� 0' '��
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
ENERGY.
Lase rf i c hAllenPlSteam Station
antAllen R ao
JAN 2
Belmont, NC280t2
5 ?019
VVQROS
'"00RF8V!LLF 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 OF unit is scheduled to be completed in February
2019. This letter is intended to provide a courtesy notification of the process startup.
The OF system will begin testing in February. The compliance sampling location for internal
outfall 005 will not be affected by the OF 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.�tlizabeth 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

� B�VG Y.
February 14, 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:
'-tECE_IVEDfNC DE NRIDWR Allen Steam Station
253 Plant Allen Roao
{ (, Belmont, NC 28012
WQ`.;C.
MOORESV!LI F REGIONAL OFFICE
Laserfiche.
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].
1 certify,, under penalty of'lavv,, that this doetiment 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, taste, 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,
� W. -�
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

ERNE DUKE
Laserfiche
May 23, 2019
NC Department of Environmental Quality
Division of Water Resources - NPDES Complex Permitting
Attn: Sergei Chernikov
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Installation of Temporary Treatment Equipment
Allen Steam Station
NPDES Permit No. NC0004979
Gaston County
Dear Dr. Chernikov:
Allen Steam Station
253 Plant Allen Roao
Belmont, NC 28012
RECEIVED/NCOENR/DWR
MAY 2 8 ni0
WOROS
MOORESVILLE REGIONAL OFFICE
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 robert.wylieCduke-energy.com.
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'� 0 . �f�
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: 1 Z X67 601 24 9698 3450

F40�
DUKE
ENERGY.
April 24, 2019
Via Overnight Mail
Laserfiche
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
James Wells
Vice President
Environmental, Health and Safety
Programs & Environmental Sciences
526 South Church Street
Mail Code EC13K
Charlotte, NC 28202
[phone]
RECEIVED/NCDENR/DWR
WQROS
MOORESVILLE REGIONAL OFFICE
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.

rA
ssrs. Basinger and Sledge
pril 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,
JameZe
Zent,
s
Vice 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

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

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
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

IKE
IERGY®
April 24, 2019
Via Overnight Mail
Laserficne James Wells
Vice President
Environmental, Health and Safety
Programs & Environmental Sciences
526 South Church Street
Mail Code EC13K
Charlotte, NC 28202
[phone]
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
RECEIVEDINCDENRIDWR
'NCIROS
MOORESVILLE REGIONAL OFFICE
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 12019 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 ells
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

2018 ANNUAL SEEP REPORT
ALLEN STEAM STATION
EMC SOC WQ S17-009
235 PLANT ALLEN ROAD
BELMONTi, NC 28012
APRIL 2019
PREPARED FOR
DUKE ENERGY CAROLINAS,, LLC
�(•� DUKE
�►, ENERGYm
CAROLINAS
Erin N. Ki ey, EIT
Project Engineer
Chr�'s Suttell, NC LG #2426
Project Manager

2018 Annual Seep Report Apri
Allen Steam Station, Duke Energy Carolinas, LLC Syr
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

Annual Seep Report April 2019
i 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 4
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

Annual Seep Report April 2019
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 2 119
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 SWO13-1 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

Nnnual Seep Report April 2019
Steam Station, Duke Energy Carolinas, LLC SynTerra
3.0 REFERENCES
North Carolina Department of Environmental Quality. (2018). Special Order by Consent
EMC SOC WQ 517-009.
Page 4

2018 Annual Seep Report April 2 119 qq
Allen Steam Station, Duke Energy Progress, LLC SynTerra
FIGURE

r
LEGEND
NPDES CONSTRUCTED SEEPS
(APPROXIMATE)
SOC NON -CONSTRUCTED SEEP
(APPROXIMATE)
AOW NOT INCLUDED IN SOCMPDES
(APPROXIMATE)
SEEP DISPOSITIONED BY SOC
(APPROXIMATE)
ACTIVE ASH BASIN WASTE BOUNDARY
ACTIVE ASH BASIN COMPLIANCE
BOUNDARY
• - RETIRED ASH BASIN WASTE BOUNDAR
_ RETIRED ASH BASIN ASH LANDFILL
WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL
• COMPLIANCE BOUNDARY
• - • DORS FILLS BOUNDARIES
DUKE ENERGY CAROLINAS ALLEN PLANT
BOUNDARY
SPECIAL ORDER BY CONSENT (SOC)
® INSPECTION AREA
�- STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015)
: WL ORDER BY CONSENT ISOC) LOCATIONS ARE CESCRIWD N
SGC WCs1i.DU9
3NAL POLLUTANT DISCHARGE EUMINATIN SYSTEM INPDES)
ITIONS ARE DESCRIBED IN PERMIT NCIIXASTS
STREAMS AND WETLANDS JURISDICTIONAL DETERMINATION
PERFORMED BY TAYLOR WISEMAN AND TAYLOR (TWT) AND
3NED USACE NSAW-MI1400109. THESE WETLANDS MIL
MIS WERE APPROVED BY THE US ARMY CORPS OF
NEERS IUSACE) ON MAY 16. M116
N. PHOTO[iiAPlIY OBTAINED FROM DOODLE EARTH PRO ON
:MBER 13. "IS AERIALWWS COLLECTED ON MARCH 30. M11S
MIND HAS BEEN SET WITH A PROJECTION OF NORTH CAROLNA
E PLANE COORDINATE SYSTEM FM 3M)O (NAM)
L
I
A
�� 3/5 O 3/5 750
p�y�
GRAPHIC SCALE IN FEET
synTena SAB RIVER MEET. SUITE 220
GREENMLLE SOOTH CARO INA 29601
PHONESS6421-9999
DUKE "
ENERGY �Od �MAATML@'.C9IRELL DYE: D.]Lw3D19
CAMWAS OIECAED BY.I OP.WO
FIGURE 1
SOC LOCATIONS AND INSPECTION AREAS
ALLEN STEAM STATION
DUKE ENERGY CAROLINAS, LLC
BELMONT. NORTH CAROLINA

TABLE 1
SOC LOCATIONS AND DESCRIPTIONS - 2018 INSPECTION
ALLEN STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELMONT, INC
Location Coordinates
Receiving
Receiving
Facility
Sample ID
Waterbotly
Description
SOC Monitoring
Interim Action Levels
Notes from Inspection
Latitude
Longitude
Waterbody
Classification
Allen
S-01 .
35.170632
-81.010093
Catawba River
WS-V; B
Located south of active ash basin. Flow Is in approximately 3 foot wide
NA - Seep Dispositioned
NA - Seep Dispositoned
Stream Flowing at a trickle. Water emerges from face of the
(Lake Wylie)
channel flowing southeast to Lake Wylie. Via sampling - No CCR Impacts
bank at a steady trickle.
Dry channel. Orange aerobic bacteria/Roc/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.
apparent on substrate. Wetness observed 50 yards upgradlent
Allen
S-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
35.17698
-81.006087
Catawba River
WS-V; B
Located east of active ash basin, between dike and river bank.
Instream Monitoring of
NA - 2B Standards Apply
east toe of the active ash basin that is captured by a toe drain
(Lake Wylie)
Intermittent, unconfined diffuse Flow towards Lake Wylie.
Lake Wylie
system (rip rap blanket) and channeled toward Lake Wylie. No
apparent discoloration of water or substrate.
Allen
S-O6
35.177049
-81.006128
Catawba River
WS-V; B
Located east of active ash basin, between dike and river bank.
Instream Monitoring of
NA - 2B Standards Apply
Steady flow.
(Lake Wylie)
Intermittent, unconfined diffuse flow towards Lake Wylie,
Lake Wylie
No apparent discoloration of water or substrate.
Catawba 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 - 28 Standards Apply
From land, 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 Dlspositioned
NA - Seep Dispositloned
Not inspected, disposltloned.
(Lake Wylie)
grouted; discharge eliminated.
NPDES locations
Moderate and steady flow that emerges from law areas at the
Allen
Toe Drain Outfall
35.1752
-81.006
Catawba River
WS-V; B
Constructed toe drain.
NA -Monitored per terms of
NA - 28 Standards Apply
east toe of the active ash basin that Is captured by a toe drain
system (rip rap blanket) and channeled toward Lake Wylie.
303 (5-03)
(Lake Wylie)
the NPDES permit
Slight Iron-oxidibng bacteria on substrate and blofllm on
headwaters and within stream.
N
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 Outfall
35.17569
-81.00606
Catawba River
WS-V; B
Constructed toe drain.
terms of
NA - Monitored per ter
NA - 28 Standards Apply
system (rip rap blanket) and channeled toward Lake Wylie.
104 (S_04)
(Lake Wylie)
the NPDES permit
water Is generally dear but has some blofllm on the water
surface and orange Iron-oxidWng bacteria observed on
substrate.
Toe Drain Outfall
35.1785
Catawba River
W5-V; B
Constructed toe drain.
NA - Monitored per terms of
NA - 2B Standards Apply
Flow that emerges from low areas at the east toe of the active
ash basin that is captured within a 12-Inch metal culvert
Allen
108 (5-08)
-81.0064
(Lake Wylie)
the NPDES permit
draining toward Lake Wylie.
Allen
Toe Drain Outfall
35.17816
-81.006517
Catawba River
W5-V; B
Constructed toe drain.
NA -Monitored per terms of
NA - 28 Standards Apply
Flow that emerges from low areas at the east toe of the active
ash basin toward a culvert directed away from dike toward Lake
SO8B (S-O86)
(Lake Wylie)
the NPDES permit
Wylie.
LVIPa:
- Loatlan prevbusly Investlgatetl aza seep. Manl[orby has not IMlmletl Iris preserve of mat mmWstbn reslduak.
• - seep tlkmsabned via repair aM/or non-fli mntllllan to potentially Waters or the U.S.— or other, as mtel. Monitoring shall be cohauctal at Me appra.rn a lomU.ns Indic.- on the attachetl she map.
• AN mgnitorlrg shall be coNucletl per the re9ulremems buntl In Attachment a of this Order.
2e _
NCAC 02L.020250hat 4
CCR - Coal Cambustbn Reskuals
mg/L-m1111g per her
NA - Not applkebb
NPDES - National Pollutant DI.Mge System
S.U. - Slardartl Unhs
SOC -special Ord- by Co05ent
5OC Tebles_At1.--L2019_01-17

2018 Annual Seep Report April 2019
Allen Steam Station, Duke Energy Progress, LLC SynTerra 4
APPENDIX A
PHOTOGRAPHS

.cc ..
� � w
+- a► � "=ice � . .
A x.
R
!.•.�ry
I/.
7�
_ S s
Nc-

i
t
1p
•vp 5.
t
410
C -rum'
N

kt

4 1*5 DUKE
ENERGY
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:
RECEIVEDINCDENRIDWR
APR -5 2019
Allen Steam Station
253 Plant Allen Roao
Belmont, NC 28012
MOORESVIL E REGIONAL 0 �.. S erf' ' e
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, tinder penalty of law, that this document and all attachments were prepared tinder 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

��yy�, r� r."^ di'�-�+j� �-,, 'r , s 'xr'� ,�, *•-� �r ,C �� ,j,�-.tF �. �.L },.c",,.•�iG }�t. T. k�tr ,� '��aF. �p*`iW,'xV,� "'�.
77,
r Page 2
.
f -�' '+, c A r : -! t, •n w.. ^ A e x )fir olt'f: a !pd¢ >,
S....t sk• 9'G£ .!'.' N .� Y,fy, t
_.4�� t ��r ys ���i� �`�' � ��s a �f � �c� • !� d � +� � yyY „� ..r'� ! y ,9 ' �'P y .a'+ � t!ir+,�. �,�,,���1 '+�.'
+�Y r 4Nk• S ) ,! y fs"-'Y„t.`. r� X Ru.
1?'
vL+r
Cc: Bob Sledge t� t ,.i s .; �i �+
t _ NC Division of Water Resources
" 1617 Mail Service CenterI
} ya
Yl
Raleigh NC 27699-1617
Mr. Corey Basinger - Regional Office Supervisor NC DWR
610 East Center Avenue, .. 3
r
Suite 301z"" ` a'� ^. Y.,
Mooresville, NC 28115
4 ^i.` ,w' K �'. f: 'i ie.:a l 2!' j jsq' 'i,,4f3 e,L7r W,•
fv� SME/FileNet�
e ✓ ,{ .. •,.. t r r?.'. r fM i1= 'i rfn r a rz¢fr a 3nv
Shannon Langley — via email `' M.' `� ,err f '. ow
>
Y�y f �`- r �.'.x' !i�! r.' .r` a �• ply iq # i
UPS Tracking: Raleigh (LC): 1Z X67 601 24 9315 4735 r._ '.,,' ti- t=+� ",•r
Mooresville (CB): 1Z X67 601 24 9352 2757
Raleigh (BS): 1 Z X67 601 24 9122 8347
I imp s . Y
�. M�{?, ,��'- � + f�.. f :,x � � . �i4 � dq✓� ytlr � r �. r z v�d� `"'Fe ,may �a'+F '�, �a. ,,c. ,
�r 'rw +4 r9 r1 5 a a4iA 1�liA� S r 1'; i{i` ai B+xAL
Q. 3 ;�
., ePl F. i• s 't: >u .'F i9-"rh.�''& t kp Yrj .. 4r :►jy s`
f�
''� � •�� •r�i ? +�.�ek _ + - ! � "gyp t.' S ~''�`*e'w` Yr ,- 1 � �� g;! �s^ r i• � C F {'1!� rr i ^.
7Far i`t • ,3. + 4 1
•t t 3 a� r, �) h _ � � n[ it ..; r� .� � . i� - �, ,n �fi '
te
"' f IY `' #s � ; f d ?-. 1 �f 'A x• w cR's i � `k S: i �•x' 3�i ' .j r a`d � a y'�� dC' r`7.r 5 r R� ,y ' 4
v "y, ����. j� � 5 s r 'E'� �{�`... ��ti '.j '0 ^.�1'• S6.^' a-i ' „h' � pY� t 9 . i� S�°' '+t•, . + t }# t r. , ,� �'4 �� � Z.;: � °� ,
Y-! X t(� ' /• �y .1-• - N t ' 'i�,•
�� t aW s4eC, :"L � 4, � ! - "T ' �N . J: y • yz i' A S r.� /, _
s-1 - . b „'T,. •. '4 b yr• '9 ' ' '. • in I 1 sr .- ✓,• $'' F
o
45 `
a :
;,tt•+• l o YN d '•� i" �+, 6; •" �.yeap�k r }L d`f�i �; 3�5° � �G• '9Y + f - 5�� ��. Y ♦ � � ,�•'1 a { .•
'7F .'n! Y��h y,F:.. !, al^ i J'�•r' 7; " �.- .w4'J ` '}S'r• t•,.> y 1
X;:: t h•i�+twy3 �,..{ :� ♦� F_ 4 a w �' ,n:s 'fi - A ._ u e.. ' -� � � t^�S�y�I r ..: i�i � '''^' r � �f '+.' �_
�t+ y
�..� '�^w lxi -. r' 'S vP �°�� ^isv.� 'L. ..Y •. �r�..+%r�. 7.: - '.+ � iAC ��Y !�*.41,+� ,,tt�s-+�• "`'' ..
t4 � �`a''::� �?� `�' rq^,� a •.r � ,-,,, FM� Y-'Ss�i�t ,.� ,9'a �`=� �; � "b� ,te' •� �'�h �� :`�-. 'fr`'�
_ . � ^�} "�# ' .^ y,� r � . � �i. � � 3y'" . 'v . �.•� P �y _ <a �• r.' r' :�' $' �rN`: !R� .:,� � � .a., +` ais
.. '�p+�•'y�)• 'f� +� F '`o :sr, . �t '�C •.5 S:l�i' . � s; I ai•.
It
wV. r s .. . �. ) t^..c jam' ♦ i „. S}r -' �/3 , 'M T � �.
9-fir.'r
�_j ,#: «. Y4r��✓.ri pia ��'

WebEOC 8.4
2o1 a
https://www_ ncsparta.net/eoc7/controlpanel.aspx
EM43 Reporting
EM Level:
NCEM Edited:
4
Yes
Taken by:
Date/Time Reported:
C Creighton
05/13/2018 20:59:00
Reported by:
Agency:
NRC
USCG
County:
City:
Gaston
Belmont
Street Address:
Allen Steam Station
- 253 Plant Allen Rd
Type: Complaint
Animal Disease Event Type:
Complaint Event Type:
Citizen
FNF Event Type:
HazMat Event Type:
Other See Description
Homeland Security Event:
Other Event Type:
Water Contamination
Transportation Event Type:
Weather Event Type:
State Resource Request
EVENT TYPE
Bomb Threat Event Type:
Fire Event Type:
FNF Class:
HazMat Class:
Non-FNF Event:
SAR Type:
Wastewater Event Type:
Weather Event Name:
�� ►� 6y 6q z
q � 3
P '3}3
0S 3
Include in Report:
Yes
Date/Time Occurred:
05/13/2018 20:40:00
Phone:
800-424-8802
Area:
13
Zip Code:
HazMat Mode:
Non-FNF Event Type:
WMD Event Type:
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.
NNRC1212036.pdf
�M u� V � �9 G L Of e 2
Olt
2 of 2 5/14/2018 8:38 AM

https://reports.ncem.org/WebEOCNCEMReports/EM43.aspx?&datai...
14 4 Il of 1 0 r Find I Next
NDM,)orth Carolina Emergency ` #MAP
Management .a
EM43 Reporting
20 11110 )U"1 -
Taken By:
J. Belcher
Reported By:
Elizabeth Glenn
County: Gaston
Street Address: 253 Plant Allen Rd
Date/Time Reported:
1/19/2018 5:43:47 PM
Agency:
Duke Energy
City: Belmont
Date/Time Occured:
1/19/2018 10:50:00 AM
Phone:
864-642-8833
Area: 13
ZIP Code:
EVENT TYPE
hvC Type: Other 'A-�"�C
(� (Z ��,1% O F S e ft �► � i JL
a� VU C- 0E-� 30
I
Other Event Type: Other See Description C'
C� " \l
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

https:Hreports.ncem.org/WebEOCNCEMReports/EM43.aspx?&datai...
Il of 1 0, i>1 IFS Find 1 Next
r North Carolina Emergency
M: igement .fzx crYea ed,
1;M ; 3 Reporting
Taken Fly: Datc/Time Reported: Date/Time Occured:
r,.Mal -avalier 1P 9:16:39 AM 1/15/2018 8:55:00 AM
Reported By: Agency; Phone:
Nit, US G-800-424-8802
County: Gaston Cit,: Belmont Area: 13
c Address: 253 PLANT ALLEN P D ZIP Code:
EVENT TYPE
Type:
iiAZv +T Event Type:
HAZMAT Class:
HAZMAT Mode:
Ha/Mat
Other S: c De :6ption
Other
Othcr
/Y 0 e15 h
C.v,nt :)ascription:
T'r c rd C forwarded a report concerning a^ un' own sheen from an unknown source on Lake Wylie. The release
was se -:.fired and cleanup operations were :.or-. cted. This incident is under investigation.
Dcf att : 0 Injuries: Evacuation: 0 Radius: 0
Latitude: 00.000000 Longitude:-00.000000
'OTIFICATIONS
A :: Adv'se,^,
E'P/ MNGT: Advise
WATER* Advised
G. Atchley, NC DHHS, and S. Lew em. led - cc
U.7.1 - FQ paged - cc
C" '9 - C;. Atchley - cc
C - ;;nristyn Fertenbaugh from DEO r•..rnc call - cc
C!' °? '%. Lott ack - cc
111F :;1 ': 18:32 AM
Page 1 of 1
:wr
3
a �;
1 of 1 " '= ,+ 1/16/2018 8:18 AM

Collection System SSO 24-Hour Notification
IF,
Collection System: Number and Name WQCS# NG 660 � q"
Incident Number from BIMS 20170 I '7 c4,�-
Incident Reviewed (Date):
Incident Action Taken: No Further Action
NOV-2017-DV
DV-2017-
..............................................................................................
Spill Date ( Time
Reported Date P �k_ Time o2 , 3 3 am pm�
Reported To SWP Staff or EM Staff M — C Cr
jr- Zti (�jQ�� 6 �� � n Phone �� �� / '
Reported By
Address of Spill ,e n Pr^ x - 4A, 4— Al fe
County L_��i 9 /1\ City 6,Zij'lon77'_
Cause of Spill kn-yu i\ \ 0 - o'jJ
Total Estimated Gallons Est. Gal to Stream
Stream Fish Kill: Yes�No-' Number Species
Non -Required Information and other comments relating to SSO incident: ` - =r see
Response time minutes Zone Map Quad
4-1 J- A s
1 �� , C Y, t, y, G. 4 6v
(� t:' �;,l G.� r% O (,; Py '{ Q( �" �. t' '4�1A �" ✓� . i .) GY 1 , w"i d��Pt � 1 f L•,(.` - � o
C.r 4"7 / S C, VG !� e O 0 P\ -"o 9 e, e i:,. 1.. L.✓l f-o ` ei %
1) MRO-PWS: Clint Cook or Mark Hahn 1 ��� �iA? Ole verbal contact date/time
P(WS Em. Cell Phone [phone] contact date/time
�'',•\`V\C,Y� fjf�eln 4"��� r5 Cd�iIloLlt 4-d lr e �/'�/� d r 7V eLij
2) DHHS: 9e &,/Clc "✓trt n hSed\l z 001 of �'s� o��e (Ali, III '1'5 -ha✓� c s )-
Alexander County - Keith Rowland [phone] contact date/time
All other Counties - Valerie Lott [phone] h 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

7 rCi ��l �I CA- L K � a Q� O r/ % K/ �tJ / k 5"
� �1 y _
Co
�e e- h �, ��'1l-Pd %- +�,'y vim f4 / r
>� - ., - �� 'Tt k Y �xt-�yp' -F b ;, .. y tip' ~ t i Mr'T`. { •^ , ' ! �. _ � _� ' j��r .
410
s-_- � 'e+_ .r 9,:#! •-t55,�ir.-. s.: ii'% i'D--,�>�n ,�a ,1:.,. �., - Nat<.d � n. 'ti. uv, ..(e♦ ;, rss .�;_
t V i
{� j
w 1 -
o
14
lilt
r
a r
a '�„r„��.wks,,,.�.i. .."i;" tFw -�,. ,re4 " :��`,k'-'r1�L�FS a._ <��, > »_ram •Y•f �. * f e `,» �,i�;,r "'3
r r
cV
. t
f �
�i vr[ z'��'a+a' �"���✓^, t e`fi :. f � 'Y -' a q '' r � st , � t� � �� �.:VW�: �

_ https://reports.ncem.org/WebEOCNCEMReports/EM43.aspx?&data...
a 4 Il of 1 o o I Find I Next 1
.sae. ...._........_. �erir,,
North Carolina Emergency ManagementEMA
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
N otes:
** No notifications needed **
12/29/2017 8:07:39 AM
Page 1 of 1
1 of 1 12/29/2017 8:07 AM

PUKE
ENERGY®
CAROLINAS
January 2, 2018
Mr. Wes Bell
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:
Allen Steam Station
Duke Energy
253 Plant Allen Road
Belmont, NC 28012
RECEIVED/NCDENR/DWR
JAN 3 2018
WORDS
MOORESVILLE REGIONAL OFFICE
In reference to Part Il, 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,
/�� ZFda','�
Brandon Garrison
Superintendent of Operations
CC: Ori Tuvia
Brent Dueitt
Randy Gantt
Kristi McCall
UPS Tracking: 1Z X67 601 24 9985 7779
aF`

RECEIVED/NCDENR/DWR
y.
JA N 9 2D18 Allen Stearn Station
253 Plant Allen Rd.
WOROS Belmont, NC 28012
MOORESVILLE REGIONAL OFFICE 704 829-2587
January 3, 2018
WPCSOCC
1618 Mail Service Center
Raleigh, North Carolina 27699-1618
Dear Madant/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 704-829-258Z
Sincerely,
2 A i�;Zmalffial
Michael R. Gantt
Lead Environmental Professional
Duke Energy LLC
Plant Allen Steam Station
253 Plant Al1en Rd.
Belmont, N.C. 28102
704-829-2587
UPS Tracking:
Raleigh: 1Z X67 601 24 9070 9221
Mooresville: lZ X67 601 24 9094 1210

wH I tK POLLUTION CONTROL SYSTEM OPERATOR DESIGNtIO(�WOESOCC)
NCAC 15A 8G .0201
JAN 9 ni8
Press TAB to enter information
Permittee Owner/Officer Name: Duke Energy Carolinas, LLC MOWOROS
ORESVILLE REGIONAL
Mailing Address: 253 Plant Allen Rd.
Phone: [phone]
city: Belmont
Email Address:
Signature:
1....__a -I- -- . . —.V.
3
Facility Name: Duke Energy- Plant Allen Steam Station
County: Gaston
Permit # NC0004979
YOU MUST SUBMIT A SEPARATEFORM FORM FOR EACH TYPE AND CLASSIFICATION OF SYSTEM:
Facility Type: PC
Facility Grade: II
Print Full Name: Michael R. Gantt
Certificate Type: PC Certificate Grade: II Work Phone: [phone]
Certificate #: 1004850
Email Address: [e-mail]
Signature:
�v Effective Date: / _ 2G /J,,-
'l 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 ISA NCAC 08G .0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Print Full Name: Donald L. Scruggs
Work Phone: [phone]
Certificate Type: PC Certificate Grade:
Certificate #: 27892
Email Address: [e-mail]
Signature: 2���6�
Effective Date: f _ 3 _ a���' "I certify that /agree to my designation as a Back-up Op Bator in Responsible Charge for the facility noted. /understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCA0804 fa
C G .02and iling to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commiccinn a
Mail, fax or email
ORIGINAL to:
WPCSOCC, 1618 Mail Service Center,
Raleigh, NC 27699-1618 Fax:[phone] Email: .. .,7v
Mail or Fax Asheville
a COPY to: 2090 US Hwy 70
Swannanoa, NC 28778
Fax: [phone]
Phone: [phone]
Washington
943 Washington Sq. Mall
Washington, NC 27889
Fax: [phone]
Phone: [phone]
Fayetteville
225 Green St., Suite 714
Fayetteville, NC 28301-5043
Fax: [phone]
Phone: [phone]
Wilmington
127 Cardinal Dr.
Wilmington, NC 28405-2845
Fax; 910 350 2004
Phone; 910-796-7215
Mooresville
610 E. Center Ave., Suite 301
Mooresville, NC 28115
Fax: [phone]
Phone: [phone]
Winston-Salem
45 W. Hanes Mall Rd.
Winston-Salem, NC 27105
Fax: [phone]
Phone: [phone]
Revised
Raleigh
3800 Barrett Dr.
Raleigh, NC 27609
Fax: [phone]
Phone: [phone]

WPCSOCC Operator Designation Form (continued)
Page
Facility Name: Duke Energy -Plant Allen Steam Station
Print Full Name: Robbin M. Jolly
Certificate Type: PC
Email Address: robbin.jolly@d
Signature:
P ORC
Certificate Grade: II
Its. com
Permit M NC0004979
Work Phone: [phone]
Certificate M 1005232
- — Effective Date: / —
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 OSG .0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission.
Print Full Name: Brandon R. Shearer
Work Phone: [phone]
Certificate Type: PC Certificate Grade:
Certificate #:1005082
Email Address: [e-mail]
Signature: � � ��
Effective Date:
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. l 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."
Print Full Name:
Certificate Type: Select
Email Address:
Work Phone:
Certificate Grade: Select Certificate M
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."
Print Full Name:
Certificate Type: Select
Email Address:
Work Phone:
Certificate Grade: Select Certificate #:
Signature:
"I certify that I agree to m d Effective Date:
Y designation os a Bads -up Operator in Responsible Charge for the facility noted. 1 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 con result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
ReViWdvzors

RECEIVED/NCDENRIDWR
WATER POLLUTION CONTROL SYSTEM OPERATOR DESIGNATION 4RRM (ff CSOCC)
NCAC 15A 8G .0201 II``�I LL 1
Press TAB to enter information WQROS
Permittee Owner/Officer Name: Duke Energy Carolinas, LLC MOORESVILLE REGIONAL OFFICE
Mailing Address: 253 Plant Allen Rd.
City: Belmont
Email Address: brent.dueitt@duke-energy,,com
Signature:
Facility Name: Duke Energy- Plant Allen Steam Station
County: Gaston
Phone: [phone]
State: NC Zip: 28012
Date: /- 3 - aol�
Permit # NC0004979
YOU MUST SUBMIT A SEPARATE FORM FOR EACH TYPE AND CLASSIFICATION OF SYSTEM:
Facility Type: VWV
Facility Grade: 11
OPERATOR IN RESPONSIBLE CHARGE (ORC)
Print Full Name: Michael R. Gantt Work Phone: [phone]
Certificate Type: VWV
Certificate Grade: II
Email Address: [e-mail]
Certificate #: 5969
Signature: Effective Date: / ,� — i
"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."
1. BACKUP ORC
Print Full Name: Donald L. Scruggs Work Phone: [phone]
Certificate Type: VWV
Email Address: don.
Certificate Grade: II
rgv.com
Certificate #:10696
Signature: ky Effective Date: / 3 ! 7
"I certify that I agree to my designation as a Back-up Ope o-- 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 09G .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: c_
ORIGINAL to: Raleigh, NC 27699-1618
Mail or Fax Asheville
a COPY to: 2090 US Hwy 70
Swannanoa, NC 28778
Fax:[phone]
Phone: [phone]
Fayetteville
225 Green St., Suite 714
Fayetteville, NC 28301-5043
Fax: 91D 486-0707
Phone: [phone]
Mooresville
610 E. Center Ave., Suite 301
Mooresville, NC 28115
Fax: [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]
Raleigh
3800 Barrett Dr.
Raleigh, NC 27609
Fax: [phone]
Phone: [phone]

Certificate Grade: Select
Work Phone:
Certificate M
Effective Date:
"I certify that l 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 .0104 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BAC91)P ORC
Print Full Name:
Certificate Type: Select
Email Address:
Signature:
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
Email Address: [e-mail]
Signature:
Certificate #: 6439
Effective Date: /— ,3- 2 p7gp
"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: Brandon R. Shearer Work Phone: [phone]
Certificate Type: WW
Certificate Grade: I
Email Address: [e-mail]
Certificate M 1005605
Signature: /�`� 2 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:
Certificate Type: Select
Email Address:
Signature:
Work Phone:
Certificate Gr=,de: Select Certificate M
Effective Date:
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. 1 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."
Rdeuised4/1016

�Y®
August 4, 2017
Mr. Jeff Poupart, Section Chief
NC Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Paul Draovitch
Senior Vice President
Environmental, Health & Safety
526 S. Church Street
Mail Code. EC3XP
Charlotte, NC 28202
(980)-373-0408
Ub'QRO-,
4 t ES1il�L n ,,,C, , A L. C?Fr=�C
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 a-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

loupart
, 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 anne.oifer(@duke-enerev.com.
Sincer y,
P I Draovitch
Senior Vice President
Duke Energy Environment Health and Safety
Attachments
Cc: Bob Sledge/NCDEQ
1617 Mail Service Center
Raleigh, NC 27699-1617
Landon Davidson/NCDEQARO
2090 US Highway 70
Swannanoa, NC 28778
David May/NC DEQ WaRO
943 Washington Square Mall
Washington, NC 27889
Corey Basinger/NC DEQ MRO
610 East Center Ave, Suite 301
Mooresville, NC 28115
Jim Gregson/NC DEQ WiRO
127 Cardinal Drive Ext.
Wilmington, NC 28405
Sherri Knight/NCDEQ WSRO
450 West Hanes Mill Rd, Suite 300
Winston-Salem, NC 27105
Trent Allen/NC DEQ FRO
225 Green Street, Suite 714
Fayetteville, NC 28301-5095
Danny Smith/NC DEQ RRO
1628 Mail Service Center
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
Owner Name
Facility Name
Station Type
NPDESStormwater
Permit Number
NPDESWastewater
Permit Number
General
Permit
Number
Facility Contact
Facility Contact Address
Duke Energy Carolinas, LLC
Duke Energy Progress, LLC
Duke Energy Carolinas, LLC
Allen
Asheville
Bear Creek
Coal
Coal/CT
Hydro
NCS000546
NCS000575
NCOOD4979
NC0000396
NCG500124
Brent Dueitt, Station Manager
Garry A. Whisnant, Station Manager
Preston H. Pierce, General Manager
253 PLANT ALLEN RD, BELMONT NC 28012
200 CP&L DRIVE, ASHEVILLE NC 28704
165 BAD CREEK RD, SALEM SC 29676
Duke Energy Carolinas, LLC
Belews Creek
Coal
NCS000573
NCO024406
Reginal 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
Duke Energy Carolinas, LLC
Duke Energy Carolinas, LLC
Brunswick
Bryson
Suck
Nuclear
Hydro
Coal/Cr
NCS000590
NC0007064
NCG500129
William R. Gideon, Site VP
Preston H. Pierce, General Manager
8470 RIVER RD. SE, SOUTHPORT NC 28461
165 BAD CREEK RD, SALEM SC 29676
1385 DUKEVILLE ROAD, SALISBURY NC 28146
NCOOD4774
Henry A. Botkins, Station Manager
Duke Energy Progress, LLC
Cape Fear
Coal/CT
NCS000574
NC0003433
Issa J. 2arzar, Station Manager
411 FAYETTEVILEL STREET, RALEIGH NC 27601
Duke Energy Carolinas, LLC
Cedar Cliff
Hydro
NCG500125
jPreston H. Pierce, General Manager
165 BAD CREEK RD, SALEM SC 29676
Duke Energy Carolinas, LLC
Cliffside
Coal
NC5000571
NC0005088
jDave Barnhardt, Station Manager
573 DUKE POWE ROAD, MOORESBORO NC 28114
Duke Energy Carolinas, LLC
Duke Energy Carolinas, LLC
Duke Energy Progress, LLC
Cowans Ford
Dan River
Harris/HEEC
Hydra
Coal/CT
Nuclear
NC5000572
NC0003468
NCG500139EHenry
ael T. Brissie, General Manager
257 DUKE LANE, STANLEY NC 28164
864 S EDGEWOOD RD, EDEN NC 27288
400 S TRYON ST, CHARLOTTE NC 28202
ence D. Sparks, Station Manager
NC0039586
min C. Waldrep, Site VP
Duke Energy Progress, LLC
Lee/Wayne County
Coal/CC
NC0003417
ry D. Hines, Station Manager
1199 BLACK JACK CHURCH RD, GOLDSBORO NC 27530
Duke Energy Carolinas, LLC
Lincoln
CT
N00080781
A. Botkins, Station Manager
1385 DUKEVILLE ROAD, SALISBURY NC 28146
Duke Energy Carolinas, LLC
Lookout Shoals
Hydro
NCG500120ael
T. Br(ssle, GeneralManager
257 DUKE LANE, STANLEY NC 28164
Duke Energy Progress, LLC
Marshall
Marshall
Mayo
McGuire
Hydro
Coal
Coal
Nuclear
NC5000548
NCS000580
NCS000020
N00004987
NCO038377
NCO024392
NCG500591
ISteven
Preston H. Pierce, General Manager
165 BAD CREEK RD, SALEM SC 29676
8320 EAST NC HWY 150, TERRELL NC28682
10660 BOSTON ROAD, ROXBORO NC 27574
12700 HAGERS FERRY RD, HUNTERSVILLE NC 28087
Duke Energy Carolinas, LLC
Duke Energy Progress, LLC
Duke Energy Carolinas, LLC
Rick R. Roper, Station Manager
Tom Copolo, Station Manager
D. Capps, Site VP
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
Duke Energy Carolinas, LLC
Duke Energy Progress, LLC
Oxford
Hydro
Hydro
CC
NCG500119
NCG500308
NCG500594
Michael T. Brissie, General Manager
Michael T. Brissie, General Manager
Thomas Hanes, Station Manager
257 DUKE LANE, STANLEY NC 28164
257 DUKE LANE, STANLEY NC 28164
198 ENERGY WAY, HAMLET NC 28345
Rhodhiss
Richmond County
Duke Energy Carolinas, LLC
Riverbend
Coal/Cr
NCS000549
N00004961
ITIm
Hill, Station Manager
400 S TRYON ST, CHARLOTTE NC 28202
Duke Energy Carolinas, LLC
Rockingham
Cr
NCON6665
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
Duke Energy Carolinas, LLC
Duke Energy Carolinas, LLC
Sutton
Tennessee Creek
Thorpe
Coal/CT
Hydro
Hydro
NC0001422
NCG500123
NCG500127
Jesse E. Huntley, Station Manager
Preston H. Pierce, General Manager
Preston H. Pierce, General Manager
801 SUTTON STEAM PLANT RD, WILMINGTON NC 29401
165 BAD CREEK RD, SALEM SC 29676
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
I
NCG500110 IMIchael
T. Brissie, General Manager
257 DUKE LANE, STANLEY NC 28164
Duke Energy Progress, LLC
Duke Energy Progress, LLC
Walters
Weatherspoon
Hydro
Coal/CT
NCS000589
NC0005363
NCG500188
IThomas
Preston H. Pierce, General Manager
Hanes, Station Manager 1198
165 BAD CREEK RD, SALEM SC 29676
ENERGY WAY, HAMLET NC 28345

A.arerRe.sw rces
=NVIPONMENTAL QUAL.T',
ROY COOPER
MICHAEL S. REGAN
S..JAY ZIMMERMAN
PERMIT NAME/OWNERSHIP CHANGE FORM
I. CURRENT PERMIT INFORMATION:
Permit Number: NC00 / / / / 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 Draovltch, P.E.
(Person legally responsible for permit)
Senior Vice President, EH&S
4.
(Title)
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
litips:Hdeq. nc.gov/about/d ivisions/water-resources/water-resources-perm its/wastewater-branch/np(ies-wastewater-perm its

NPDES Name & Ownership Change
Page 2 of 2
certification:
Haul Uraovitch , 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 su orting information and attachments are not included, this application
package wil ere me "asomplete.
Signature: G.� `" ' Date:
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 712016

EN Y
July 13, 2017
WPCSOCC
1618 Mail Service Center
Raleigh, North Carolina 27699-1618
Dear Madam/Sir.
Allen Steam Station
253 Plant Allen Rd.
Belmont, NC 28012
704 829-2587
RECEIVED/NCDENR/DWR
JUL 14 2017
WOROS
MOORESVILLE REGIONAL OFFICE
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 704-829-258Z
Sincerely,
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: lZ X67 601 24 %56 2431
Mooresville: iZ X67 601 24 9900 3048

RECEIVED/NCDENR/DWR
WATER POLLUTION CONTROL SYSTEM OPERATOR DESIGNATION FORM (W�P�,CSOCCLTT 17
NCAC 15A 8G .0201 U
Press TAB to enter information WQROSMOORESVILLE 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 %' /.J-,2,0 /
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
OQ9(2ATQRIN RESPON$lgL.E CHARGE (ORCj.
Print Full Name: Michael R. Gantt Work Phone: [phone]
Certificate Type: PC
Email Address: michael.
Signature: (/\ ,
Certificate Grade: II
.com
Certificate #: 1004850
Effective Date: —7 / r
"I certify that I agree to my designation as the Operator in Responsible Charge for the facility noted. I understand and Gill 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
Email Address: [e-mail]
Signature:
Certificate #: 27892
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 asset 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] Ia1 d�:aa .�+�� •�,�..�,,,
ORIGINAL to: Raleigh, NC 27699-1618
Mail or Fax Asheville
a COPY to: 2090 US Hwy 70
Swannanoa, NC 28778
Fax:[phone]
Phone: [phone]
Washington
943 Washington Sq. Mall
Washington, NC 27889
Fax: [phone]
Phone: [phone]
Fayetteville
225 Green St., Suite 714
Fayetteville, NC 28301-5043
Fax: [phone]
Phone: [phone]
Wilmington
127 Cardinal Dr.
Wilmington, NC 28405-2845
Fax: [phone]
Phone: [phone]
Mooresville
610 E. Center Ave., Suite 301
Mooresville, NC 28115
Fax: [phone]
Phone:[phone]
Winston-Salem
45 W. Hanes Mall Rd.
Winston-Salem, NC 27105
Fax: [phone]
Phone: [phone]
Raleigh
3800 Barrett Dr.
Raleigh, NC 27609
Fax: [phone]
Phone:[phone]
Rewsed 4/2016

WPCSOCC Operator Designation Form (continued)
Facility Name: Duke Energy- Plant Allen Steam Station
Print Full Name: Robbin M. Jolly
Certificate Type: PC
Email Address: robbin
Signature:
Certificate Grade: I
.com
Permit #: NC0004979
Work Phone: [phone]
Certificate #: 27876
Effective Date:
Page 2
"I certify that / agree to my designatidnn as a Back-up Operator in Responsible Charge for the facility noted. I unde stand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC asset 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. "
Print Full Name:
Certificate Type: Select
Email Address:
Signature:
Work Phone:
Certificate Grade: Select Certificate M
Effective Date:
'? certify that l 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 asset 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."
Print Full Name: Work Phone:
Certificate Type: Select
Email Address:
Signature:
Certificate Grade: Select
Certificate M
Effective Date:
"I certify that/ 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."
Print Full Name:
Certificate Type: Select
Email Address:
Signature:
Certificate Grade: Select
Work Phone:
Certificate M
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 402016

RECEIVEDINCDENRIDWR
WATER POLLUTION CONTROL SYSTEM OPERATOR DESIGNATION FORM (WPIROFV2017
NCAC 15A 8G .0201
Press TAB to enter information
Permittee Owner/Officer Name: Duke Energy Carolinas, LLC
Mailing Address: 153 Plant Allen Rd.
City: Belmont State
Email Address: [e-mail]
Signature:
Facility Name: Duke Energy- Plant Allen Steam Station
County: Gaston
WQROS
MOORESVILLE REGIONAL OFFICE
Phone: [phone]
NC Zip: 28012
Date: 07-/3-ao1?
Permit # NC0004979
YOU MUST SUBMIT A SEPARATE FORM FOR EACH TYPE AND CLASSIFICATION OF SYSTEM:
Facility Type: WW
Facility Grade: II
Print Full Name: Michael R. Gantt
Certificate Type: WW
OPERATOR IN RESPONSJBLE CHARGE (ORC)
Certificate Grade: II
Email Address: [e-mail]
Signature: --A—_
Work Phone: [phone]
Certificate #: 5969
Effective Date:
"I certify that 1 agree to my designation as the Operator in Responsible Charge for the facility noted. 1 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."
Print Full Name: Donald L. Scruggs
Certificate Type: WW
Certificate Grade: II
Email Address: [e-mail]
Signature:
Work Phone: [phone]
Certificate #:10696
Effective Date: i / 12 /f
"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] rl�� _g,,, a ,,�« ,.,
ORIGINAL to: Raleigh, NC 27699-1618
Mail or Fax Asheville
a COPY to: 2090 US Hwy 70
Swannanoa, NC 28778
Fax: [phone]
Phone: [phone]
Washington
943 Washington Sq. Mall
Washington, NC 27889
Fax: [phone]
Phone: [phone]
Fayetteville
225 Green St., Suite 714
Fayetteville, NC 28301-5043
Fax: [phone]
Phone: [phone]
Wilmington
127 Cardinal Dr.
Wilmington, NC 28405-2845
Fax: [phone]
Phone:[phone]
Mooresville
610 E. Center Ave., Suite 301
Mooresville, NC 28115
Fax: [phone]
Phone:[phone]
Winston-Salem
45 W. Hanes Mall Rd.
Winston-Salem, NC 27105
Fax: [phone]
Phone: [phone]
Raleigh
3800 Barrett Dr.
Raleigh, NC 27609
Fax: [phone]
Phone: [phone]
Revised 402016

WPCSOCC Operator Designation Form (continued)
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
Email Address: [e-mail]
Signature:
Certificate #: 6439
Effective Date:
Page 2
"Icertify that I agree to designation p p p g f facility
fY 9 Y 9 a ack-u O erator in Responsible Charge or the acilit noted. 1 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."
-PA, C,—VP QRC
Print Full Name: Work Phone:
Certificate Type: Select
Email Address:
Signature:
Certificate Grade: Select
Certificate M
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."
Print Full Name:
Certificate Type: Select
Email Address:
Certificate Grade: Select
Work Phone:
Certificate M
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. "
Print Full Name: Work Phone:
Certificate Type: Select Certificate Grade: Select Certificate M
Email Address:
Signature:
Effective Date:
"I certify that 1 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 foiling to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Revised 402016

_:� DUKE
ENERGY,
April 18, 2017
RFr,1=n/Ep
APR 2 b 2011
HIM- OVIRmatemaw
North Carolina Department of Environmental Quality
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Allen Steam Station MOD
253 Plant Allen Road MOD
Belmont, NC 28072
704 382 4761
704 382 6240 fax
RECEIVEDlNCDENR/DWR
WQROS
MOORESVILLE REGIONAL OFFICE
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
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,
P. Brent Dueitt
Allen Steam Station
General Manager 11 Carolinas West

ike Cc: Mr. Ed Sullivan — EC13K
Mr. Sean DeNeale — E-d3K
Mr. Randy Gantt — Alien Stearn Station
Attachments
i; :. �. s 3�' _ e� :. • r r .s.. w. bra � . e..7�

DUKE
ENERGY.
Sep. 28, 2016
253 Plant Allen Rd
Belmont NC 28012
704 829-2400
704 806 2011
Bient DuedlCmduke energy com
RECEIVED/NCDENR/DWR
Mr. Tom BelnickN 3
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.Gantt(@duke-enew.com if
you have questions or need additional information.
Sincerely,
&IA,a— 41)
Brent Dueitt
Plant Manager
CC: Randy Gantt
Brandon Garrison
Kristi McCall
Melanie Gardner

GROUNDWATER QUALITY MONITORING DEPARTMENT OF ENVIRONMENTAL QUALITY
COMPLIANCE REPORT FORM DIVISION OF WATER QUALITY - INFORMATION PROCESSING UNIT
< 1617 MAIL SERVICE CENTER, RALEIGH, NC 27699-1617 Phone: [phone]
FACILITY INFORMATION Please Print Clearly or Type
Facility Name: Allen Steam Station Permit Type:j NPDES Expiration Date: F 5/31/2 115
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
(Cny) (State) (Zip)
Contact Person: Sean DeNeale Telephone# [phone]
Well Location/Site Name: Allen Ash Basin No. of wells to be sampled: 13
(from Permit)
Y
$R'IN'�?'-i+?
.. 1 .,...^.r ;et.-F�<is:�2'w. ..c .,: §:" ,ate. ;..: .0 ik �:.4..., .,.r .-;: a.. ��::.L-+.- <• .6 -.: .
, z :, _ Monftor ng Well Construction Information-
Units
Well ID Number (From Permit)
AB-iR I
AB-4S
AB-4D
AB-11D
AB-12S
AB-12D
AB-135
AB-13D
AB-14D
AB-95*
AS-9D*
AB-10S*
AB-10D*
MW-
MW-
MW-
MW-
MW-
Well Depth [ft below land surface]
It
70.89
22.38
49.99
20.53
23.58
96.53
21.97
72.20
29AS
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.O
2.0
2.0
2.0
2.0
Screen Top [ft below land surface]
It
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]
it
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
It
675.86
650.46
649,17
618.07
651.69
651.75
648.72
648.54
641.80
582.73
582.72
575.051
574.97
Sampling Analysis
5a nformation and Field An s
❑ DRY
❑ DRY
❑ DRY
❑ DRY
CHECK IF DRY WELL AT TIME OF SAMPLING
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
[I DRY
(] DRY
❑ DRY
[ ] DRY
❑ DRY
[] DRY
❑ DRY
n DRY
❑ DRY
1SA-21.
Units
AB-1R
AB-4S
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-
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
03/0712017
03/07/2017
Volume of Water pumped/bailed
gal
1A0
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
Nonel
None
None
None
Nonel
None
None
None
Appearance
Normal
Normal
Normall
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 fond - 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 Fit.) (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 - 9.5
SU
6.2
6.0
6.0
5.9
5.0
6.4
5.6
6.2
5.3
6.3
6.71
6.11
6.2
Laboratory Information
Laboratory Name
Sample Analysis Date
Duke Energy Analytical Laboratory
Certification #
NC DENR # 248
Samples for metals were collected unfiltered: Yes 0 No
and field acidified: Yes ❑ No
March 8 - 16, 2017
IMACt
15A-21.
Units
AB -SR
A845
AB-4D
AB-11D
AB-125
AB-12D
AB-13S
AB-13D
AB-14D
AO-9S*
AB-9D*
AB-105*
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
<1
<1
<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
2S
Nitrate (NO3) as N (00620)
---
10
mg/I
0.13
1.4
2.4
0.05
0.08
2.3
2A
2.4
2.9
<0.023
0.05
0.05
<0.023
Cd - Cadmium (01027)
---
2
ug/I
<1
<1
<1
<1
<11
<1
<1
<1
<1
<1
<1
<11
<1
Cr - Chromium (01034)
---
10
ug/I
5
<5
6
<5
<5
<5
<5
6
<5
<5
<5
<51
<5
Cu - Copper (01042)
---
1
mg/I
<0.005
<O.00S
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)
---
50
ug/I
<5
27
<5
<5
42
<5
21
73
23
10400
12
684
17
Ni - Nickel (01067)
---
100
ug/I
<5
<S
<5
<S
<5
<5
<5
5
35
<5
<5
<5
<5
Pit - Lead (01051)
---
IS
ug/I
<1
<1
<1
<1
<1
<1
<1
<1
<S
<1
<1
<1
<1
Zn - Zinc (01092)
---
1
mg/I
<0.005
<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
<SO
<50
<50
<50
<50
<SO
<50
161
759
567
<50
<50
TI -Thallium (01059)
0.2
NE
ug/I
<0.2 (63)
<0.2 (B3)
<0.2 (83)
<0.2 (B3)
<0.2 (83)
<0.2 (63)
<0.2 (B3)
<0.2 (B3)
<0.2 (83)
<0.2 (B3)
<0.2 (B3)
<0.2 (B3)
<0.2 (B3)
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
E;j
23.9
48.1
14.1
55
66.3
51.6
40.8
At - Aluminum (01105)
---
NE
ug/I
55
587
12
32
407
55
90
3720
818
67
114
63
598
Be - Beryllium (01012)
4
NE
ug/l
<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/I
86.3 (M4)
9.93
12.5
9.62
0.197
18.4
8.07
15A
4.8
12
29.1
15.6
16A
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
<11
1.72
3.6
8.1
<1
1.69
<1
Mg - Magnesium (00927)
---
NE
mg/1
21.2
5A6
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
223
1.8
1,53
Na - Sodium (82035)
---
NE
mg/1
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
T55- 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
1.471
4.451
1 711
03731
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
0.1471
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 descriptiors
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 DWO-ceflified laboratory. I am aware that there are significant penalties for submitting false information, including the possibility of fines
and imprisonment for knowing violations
P. Brent Dueitt / GM II Carolinas West / Plant Allen
Permittee (or Authorized Agent) Name and Title Please print or type Signature of Permittee r Authorized Agent) Date
V
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 only.

GROUNDWATER QUALITY MONITORING
COMPLIANCE REPORT FORM
FACILITY INFORMATION
'
Facility Name:
Permit Name (if different):
Facility Address:
Belmont
(CKY)
Contact Person:
Well Location/Site Name:
March 2017 Monitoring Event
Qualifiers:
Please Print Clearly or Type
Allen Steam Station
Duke Energy Carolinas, LLC
253 Plant Allen Road
(Street)
NC
28012 County Gaston
(State)
(Zip)
Sean DeNeale
Telephonett F 704-382-4761
Allen Ash Basin
No. of wells to be sampled: 1 13
B3 Target analyte was detected in Continuing Calibration Blank (CCB) at a concentration greater than Y: 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
RTMENT OF ENVIRONMENTAL QUALITY aYt^€
ION OF WATER QUALITY - INFORMATION PROCESSING UNIT
MAIL SERVICE CENTER, RALEIGH, NC 27699-1617 Phone: [phone]
Permit Type:1 NPDES Expiration Date: 1 5/31/2015
PERMIT Number: NC0004979
TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
•'.yyam -. � � .,p... T y}.. _.
C

Submitter Change Request Form — (Add update users)
DWR
North Carolina Electronic Discharge Monitoring Report System
DIN -Won of Water Resources
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 For n
(available from the eDMR website) and submit it to the NCDWR eDMR Administrator at the address
below.
Ttpe of Request (please select):
r
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:
Owner / Organization Name:
ble Official
d in accordance ivith
Street Address:
City:
State / Zip Code:
Telephone number:
E-mail address:
NCO004979
Duke Energy Carolinas LLC
Brent Dueitt
253 Plant Allen Road
Belmont
NC 28012
( 704 ) 829-2400
[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 Oivner
and Facility Administrator can deactivate or delete eDMR user permissions for any individual ►vithin
its organization, including Submitter permissions.
The Submitter is a trivalent to the individual tirho s&ms the certification statement on the back o 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): I NC0004979
First Name: Brandon
Middle Name: R
Last Name: Garrison
Phone Number: (704 ) 829-2426 1
Email: Brandon. [e-mail] User ID:
Select Request d Add User Permission
Type: ❑ Update User Permission AAAI*,-a_
Submitter User Details
Permit No. (s): NC0004979
First Name: Kristi
Middle Name: C
Last Name: McCall
Phone Number: ( 704 ) 829-2434
Email: [e-mail]
Select Request ® Add User Permission
Tom: ❑ Update User Permission
User ID:
Submitter User I
Permit No. (s):
First Name:
Middle Name:
Last Name:
Phone Number: ( )
Email: Use
Select Request ❑ Add User Permission
Type: ❑ Update User Permission
3
a
User Permission as or
User Permission as
Peraus
ID:
Assi ned bt, NCDWR eDAIR Administrator
Jpdate 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 CFR 122.22, is the appropriate individual
with the authority to sign reports for the organization.
1. Brent Dueitt _ (Printed name), have the authority to make this request for
Duke Energy Carolinas LLC/Allen Steam Station (pi, ner Orgarrization Name).
1 request the NCDWR add or update the eDMR Submitter user permission(s) as indicated above on the
Submitter User Details page.
Station Manager 01
Owner/Responsible Official Signature Title Date
Please return the completed form to the NCDWR eDMR Administrator via:
Fax: or E-mail:
[phone] eE MRadmin<,-',ncdenr.goy
or Mail to:
Information Processing Unit
Attn: eDMR Registration
1617 Mail Service Center
Raleigh, NC 27699-1617
NCDWR eDMR Submitter Change Request Form - ver. L0 Page 3

RECEIVED/NCDENR/DWR S CCP Environmental Programs
(.� DUKE
ENERGY
28 April 2016
Mr. Sergei Chernikov
North Carolina Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Duke Energy
i k 2 9 2016 526 South Church Street
Charlotte, NC 28202
WQROS
MOORESVILLE REGIONAL OFFICE Mailing Address:
EC13K / P.O. Box 1006
Charlotte, NC 28201-1006
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 35.1781100,-81.006350°
S-11 35.1808000,-81.0061400
S-12 35.1809730,-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,
y . 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

1vctter Resources
LNVIRONMCN IAL OUALITY
EIVLe_-
Mr.�tt, General Manager II
Regional Stations
Duke Energy Carolinas. LLC
253 Plant Allen Road
Belmont, NC 28012
Dear Mr. Dueitt:
ROY COOPER
�W
Governor
MICHAEL S. REGAN
Secretary
S. JAY ZIMMERMAN
Director
March 24, 2017
Subject: Compliance Evaluation Inspection
Duke Energy Allen Steam Station
NPDES Permit No. NCO085588
Li In County
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] i Fax: [phone] Customer Service:1-877-623-6748

United States Environmental Protection Agency
Form Approved.
trA Washington. D.0 20460
OMB No. 2040-W57
Water Golpliance Inspection Report
Approval expires8-31`98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES ydmo/day Inspection Type Inspector Fac Type
1 IN i 2 Is I 3 ( NC0004979 I11 121 17/03122 k17 18 i r ) 19 (S ( 20Lj
LJ LJ LJ U
21 6
Inspection Work Days Facilityy Self -Monitoring Evaluation Rating B1 QA Reserved
67 1.0 70 �d I 71 IN I 72 I eJ I 73I + I74 751I I I I I 1 180
LJ L_i t l I
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)
10:05AM 17/03122
11/03/01
Plant Allen Steam Station
Exit Time/Date
Permit Expiration Date
253 Plant Allen Rd
Belntont NC 28012
02:00PM 17/03/22
15/05/31
Name(s) of Onsite Representative(s)rrittes(s)/Phone and Fax Number(s)
Other Facility Data
M
Michael R GaMVORC1704-829-2587/
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Allen Stowe,526 S Chruch St Charlotte NC 2820110021i704382-430917043829840
No
Section C- Areas Evaluated During Inspection (Check only those areas evaluated)
Permit Flow Measurement Operations & Nlaintenancc Records/Reports
Setf-Monitoring Program Sludge Handling Disposal Facility Site Review EffluenuReceiving Waters
Laboratory
Secfion D. Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(see attachment summary)
Name(s) and Signatures) of Inspector(s) AgencylOfficeiPhone and Fax Numbers Date
On A Tuvia MRO WQiR04-663-1699/
Z� 12a1,,
Signature of M anagement Q A Fieviewer AgencyiOfficeiPhone and Fax Numbers Date
Andrew Pitner MRO WQ//704-663-1699 Ext.21
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page#

NPDES yrlmolday Inspection Type
31 NW004979 (11 121 17/03122 17 18 i c I
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Brandy Costner was a secondary inspector
Page#

W.ppppp-
Permit NG0004979 Owner -Facility Plant Allen Steam Station
Inspection Date 03122,2017 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
M
❑
❑
❑
application?
Is the facility as described in the permit?
■
❑
❑
❑
# Are there any special conditions for the permit?
M
❑
❑
❑
Is access to the plant site restricted to the general public?
E
❑
❑
❑
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 Outfalis 001, 003, and 004
Record Keeping
Yes No NA NE
Are records kept and maintained as required by the permit?
M
❑
❑
❑
Is all required information readily available, complete and current?
M
❑
❑
❑
Are all records maintained for 3 years (lab. reg. required 5 years)?
M
❑
❑
❑
Are analytical results consistent with data reported on DMRs?
M
❑
❑
❑
Is the chain -of -custody complete?
0
❑
❑
❑
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?
f
❑
❑
❑
Has the facility submitted its annual compliance report to users and DWQ7
❑
❑M
❑
(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?
E
❑
❑
❑
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?
❑
❑
M
❑
Comment: The records reviewed during the inspection were organized and well maintained.DMRs
COCs ORC lops and calibration logs 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

h,Oqq
bhMM%hh'
Permit NCO004979 Owner -Facility Plant Allen Steam Station
Inspection ©ate. 03/22/2017 Inspection Type Compliance Evaluation
Laboratory
Yes No NA NE
Are field parameters performed by certified personnel or laboratory?
M
❑
❑
❑
Are all other perameters(excluding field parameters) performed by a certified lab?
❑
❑
❑
# Is the facility using a contract lab?
❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
❑
❑
❑
Celsius)?
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? ❑ ❑ M ❑
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? ❑ ❑ N ❑
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?
❑
❑
0
❑
Is sample collected above side streams?
❑
❑
❑
Is proper volume collected?
`
❑
❑
❑
Is the tubing clean?
❑
❑
■
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
❑
❑
M
❑
Celsius)?
Is sampling performed according to the permit?
t
❑
❑
❑
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?
❑
❑
M
❑
Is sample collected below all treatment units?
M
❑
❑
❑
Is proper volume collected?
S
❑
❑
❑
Is the tubing clean?
❑
❑
M
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
❑
❑
M
❑
Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type
M
❑
❑
❑
representative)?
Comment: The subject permit requires effluent grab samples.
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ ❑ ❑ ❑
Page# 4

Permit NCOOO4979
Inspection Date ON2212017
Owner -Facility Plant Allen Steam Station
Inspection Type Compliance Evaluation
Operations & Maintenance Yes No NA NE
Does the facility analyze process control parameters, for ex: MASS, MCRT, Settleable ❑ ❑ N ❑
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?
❑
❑
0
❑
Is the basin free of bypass lines or structures to the natural environment?
■
❑
❑
❑
Is the basin free of excessive grease?
M
❑
❑
❑
Are all pumps present?
■
❑
❑
❑
Are all pumps operable?
M
❑
❑
❑
Are float controls operable?
■
❑
❑
❑
Are audible and visual alarms operable?
❑
❑
M
❑
# Is basin sizelvolume adequate?
■
❑
❑
❑
Comment:
Chemical Feed
Yes No NA NE
Is containment adequate?
■
❑
❑
❑
Is storage adequate?
■
❑
❑
❑
Are backup pumps available?
M
❑
❑
❑
Is the site free of excessive leaking?
N
❑
❑
❑
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?
■
❑
❑
❑
Is the site free of excessive buildup of solids in center well of circular clarifier?
M
❑
❑
❑
Are weirs level?
M
❑
❑
❑
Is the site free of weir blockage?
■
❑
❑
❑
Is the site free of evidence of short-circuiting?
❑
❑
❑
Is scum removal adequate?
❑
❑
❑
Is the site free of excessive floating sludge?
0
❑
❑
❑
Is the drive unit operational?
■
❑
❑
❑
Page# 5

Permit NCO004979 Owner -Facility.
Plant Allen Steam Station
inspection Date 03122/2017 Inspection Type
Compliance Evaluation
Secondary Clarifier
Yes No NA NE
Is the return rate acceptable (low turbulence)?
M
❑
❑
❑
Is the overflow clear of excessive solids/pin floc?
M
❑
❑
❑
Is the sludge blanket level acceptable? (Approximately'/d of the sidewall depth)
0
❑
❑
❑
Comment:
Flow Measurement - Influent
Yes No
NA NE
# Is flow meter used for reporting?
0
❑
❑
❑
Is floe meter calibrated annually?
■
❑
❑
❑
Is the flow meter operational?
M
❑
❑
❑
(If units are separated) Does the chart recorder match the flow meter?
❑
❑
M
❑
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?
M
❑
❑
❑
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?
❑
❑
❑
N
Is the site free of excessive moisture in belt filter press sludge cake?
❑
❑
❑
0
The facility has an approved sludge management plan?
■
❑
❑
❑
Comment: The FGD WWTS is eauirmed 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.
Flow Measurement - Effluent Yes No NA NE
# Is flow meter used for reporting? ❑ ❑ ■ ❑
Is flow meter calibrated annually?
❑
❑
0
❑
Is the flow meter operational?
❑
❑
0
❑
(If units are separated) Does the chart recorder match the flow meter?
❑
❑
0
❑
Page# 6

Permit NCO004979
Inspection Date. 0312212017
Flow Measurement - Effluent
Owner -Facility Plant Allen Steam Station
Inspection Type Compliance Evaluation
Yes No NA NE
Comment: Flow_ measurements for Outfalls 001, 003, and 004 are based on pump curves/loos. 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?
M
❑
❑
❑
If effluent (diffuser pipes are required) are they operating property?
❑
❑
0
❑
Comment: No discharges were observed from Outfalls 002A 002t3 and 005 (internal) at the time of the
infection. 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

�r4� DUKE
'! ENERGY
W
August 17, 2016
F?FCFA/F®
North Carolina Department of Environmenta40"t$ 2416
Division of Water Resources
Information Processing
1617 Mail Service Center
'WORMATONRPROCESSING
UNIT
Raleigh, NC 27699-1617
RE: Duke Energy Carolinas, LLC. — Allen Steam Station
July 2016 Groundwater Monitoring Sampling and Analysis Results
Allen Steam Station
253 Plant Allen Road
Belmont, NC 28012
704 382 4761
704 382 6240 fax
_,
RECEIVED/NCDENR/[i Ft
A1111 2 9 2016
WQROS
MOORESVILLE REGIONAL OFFICE
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. 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. 1 am aware that there are
significant penalties for submitting false information, including the possibility of fines and imprisonment
for knowing violations.
Sincerely,
P 6,J- 0".�
P. Brent Dueitt
Allen Steam Station
General Manager 11 Carolinas West

vr"
GROUNDWATER QUALITY MONITORING DEPARTMENT OF ENVIRONMENTAL QUALITY
COMPLIANCE REPORT FORM DIVISION OF WATER QUALITY- INFORMATION PROCESSING UNIT
M1617 MAIL SERVICE CENTER, RALEIGH, NC 27699-1617 Phone: [phone]
FACILITY INFORMATION Please Print Clearly or Type
Facility Name: Allen Steam Station Permit Type:1 NPDES Expiration Date: S/31/2015
Permit Name (if different): Duke Energy Carolinas, LLC PERMIT Number:1 NC0004979 RECEIVED/N
Facility Address: 253 Plant Allen Road CDE
(street; TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
Belmont NC 2801Z County Gaston AUG 2 9 2
1•-''-ri (Stat_i (ZIP)
Contact Person. Sean De Neale Telephonelt 704-382-4761 WQROS
Well Location/Site Name: Allen Ash Basin No. of wells to be sampled: 13 MOORE fr�mPermt; SVILLE REGION,
Monitoring Well Construction Information
Units
Well ID Number (From Permit)
AB-111
AB-4S
AB-4D
AB-11D
AB-125
AB-12D
AB-135
AB-13D
AB-14D
AS-95`
AB-9D•
AS -SOS•
AB-10D'
Mw-
MW.
MW-
MW-
MW-
Well Depth [ft below land surface]
, _
R
70 89
22 38
49 99
20 53
2159
95 S3
21 9 7
r? 20
29 45
21 01
11� 23
18 41
62 44
Measuring Point Qoc) (ft above land surface]
it
2.29
2.52
2.19
2 68
205
204
2.74
_
2-65
2.44
2 19
2 3S
_
2 44
2 56
Well Diameter
in
2.0
2.0
2.0
20
2.0
2 0
20
2.0
20
2.0
2 0
2 0
2 0
Screen Top [it below land surface)
ft
60.89
7.38
44.99
15.53
8.58
9153
_
6.97
67.20
24.45
6.01
110.23
3.41
57.44
Screen Bottom (ft below land surface)
it
10.89
22.38
49.99
20 53
23 58
9653
21.97
12.20
648 54
29.45
641.90
2101
582 73
115 23
582 12
18.41
SIS.05
62.44
57497
Relative Measuring Point Elevation
_
it
675 861
6SO 461
6.19 171
61801
651691
651 751
6,18. 12
Sampling Information and Field Analysis
CHECK IF DRY WELL AT TIME OF SAMPLING
r._.' LIPY
Li DRY
- 1 UP,
-
i.::.�.+
L DR..
� ! sr
� ;,a.,
_.
i ,,�v
" ] pz+
-
,J pv,
� SR-r
� pe r
_
[ � ua+
� ! DRY
❑ DRY
Lj DR
C � DRY
[m�
1SA-2L
Units
A8-1R
AB-4S
AB-4D
AB-11D
AB-125
AB-12D
.4B-135
AB•13D
AB-14D
AB-9S•
AB-9D'
AB-10S'
AB-10D'
NI
MW-
MW-
MW
MW-
Sample Date
07/07/2016
07/07/2016
01/01/2016
07/07/2016
07/07/2016
02/01/2016
0//07/2016
07/07/2016
01/07/2016
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
210
15 05
14.00
1.05
8.35
525
3 30
1.95
4.20
Temperature (00010)
deg. C
16.7
16.5
16.3
16.5
15.3
158
16.9
20 7
16A
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
356
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
024
0.35
0.15
0.24
Oxidation Reduction Potential(00090)
mV
568
241
397
276
346
321
550
500
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
S2 06
11.06
9.56
171
14.09
12 23
_
9.34
9.37
14.98
.2 18
14.01
8.48
846
H - field (00400
6.5 - 8.5
Su
6.3
6.1
6.0
6.0
5.1
6.4
5.6
6.2
SA
6.3
6.6
6.1
6.2
Laboratory Information
Laboratory Name
Sample Analysis Date
Duke Energy Analytical Laboratory
Certification N
NC DENR k 248
Samples for metals were collected unfiltered: Yes No
and field acidified- l%) Yes '-; No
July 7 - 20, 2016
IMACl
15A-2L
Units
AB-1R
AB-4S
AB-4D
AB-11D
AB-125
AB-12D
AB-135
AB-130
AB-14D
AB-9S'
AB-9D'
AB-10S•
AB-IOD'
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
94
8.2
13
7.9
As - Arsenic (01002)
--
10
ug/I
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
504 - Sulfate (00945)
---
250
mg/1
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
<S
<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)
-
50
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
<S
<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
0,018
<0.005
0.009
0.05
0.023
0.015
0.01
<0.00S
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(010S91
0.2
NE
ug/I
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/I
<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/1
51.6
42.9
43.2
50.1
<5
62,9
34.8
48.5
15.7
52.1
65.7
56.2 (MI)
40 7
AI - Aluminum (01105)
---
NE
ug/I
44
3291
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
562
40.7
Ca - Calcium (00916)
---
NE
mg/1
83.6
8.69
12.2
10
0.337
16A
6.52
14.3
4.87
10.7
27 3
14
15.6
CO3- Carbonate(00445)
-
NE
mg/I
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
15
<5
<5
Co - Cobalt (01037)
1
NE
ug/I
<1
1.08
<1
<1
<1
<1
<1
<1
6.22
8.3
<1
1.72
<1
Mg • Magnesium (00927)
NE
mg/I
1 19.8
4.95
3.47
3.29
1.12
431
3.15
3.52
2.19
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
153
2 5
0.845
2.33
1.19
1.72
1.5
0.912
2.23
1.63
15
Na - Sodium (82035)
--
NE
mg/I
10.9
6.85
8 22
889
2.25
7 68
5.97
9.63
19.5
11 2
11.9
11
9.58
TSS -Total Susp. Solids (70031)
-
NE
mg/1
<5
<5
<5
<5
11
<5
<5
<5
12
<S
<5
<5
<5
V - Vanadium (01087)
0.3
NE
ug/I
2.15
17
449
-I 9
0 952
4.07
079
6 69
1261
<0 31
7.21
0 446
566
Sr - Strontium (01082)
••-
NE
mg/I
0.757
1041
0 181
0 i 4
<0.005
0.175
0,058
0. 197
00131
0,1391
0 315
0 194
0 188
T.,r6,Mf eld...lwfd for infer-t- use -1,
`1- %I'- W=nbl:;h=d BOLD Va!uPs equal o' exceed the corresponding 2L stardard Notes :�� ',t,;. ,R �. r=.._ .. 'y_. i,d A� '^`.. I,'I,..'Vr":i [i 1 .&_ra!
cerfify that, to the best of my knowledgeIrn submitted in this report is true, accurate. and complete, and that the laboratory analytical data was produced usi4 approvedw - - -that there are significantpenaltiesand imprisonment for knowing violations.
P. Brent Dueitt / GM II Carolinas West / Plant Allen "-//-
Perm'ttee (or Author zed Agert) Name and -t'e - Please Dr'rt a, t,oe 5lg-�ature of Perm.tte or Authorized Agert) -�-� Oate
WDWR
uel
IIL OFFICE
U W-olma.n s,olcvaj 1 -ine irvi S were Fssuea In Lulu, zuix, ano tuft; nowever IsILMLt nas not estatiosmed -'feel''. DcKeU iC,d- of Com DI'acre nDUrdar,
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.

VE
UKE
N ERGY:
April 13, 2016
APR 18 2016
,WMjAT0 pROMWG UNIT
North Carolina Department of Environmental Quality
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Allen Steam Station
253 Plant Allen Road
Behnont NC 28012
704382 476 1
704 3826240 tax
0
RE: Duke Energy Carolinas, LLC. — Allen Steam Station
March 2016 Groundwater Monitoring Sampling and Analysis Results
RECEIVED/NCDENR/DWR
APR 2 5 2016
MOORESVILLE REGIONAL OFFICE
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].
/ 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,
P. Brent Dueitt
Allen Steam Station
General Manager li Carolinas West

GROUNDWATER QUALITY MONITORING DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER QUALITY- INFORMATION PROCESSING UNIT
COMPLIANCE REPORT FORM M3617MAII SERVICE CENTER, RALEIGH, NC 27699-1617 Phone: [phone]
FACILITY41,1FORMATION Please Print Clearly or Type
Facility Name: Allen Steam Station Permit Type: NPDES Expiration Date: 5J31/2015
Permit Name (if different): Duke Energy Carolinas, LLC PERMIT Number: NC0004979
Facility Address: 253 Plant Allen Road
(Str-tj TYPE Of PERMITTED OPERATION BEING MONITORED Ash impoundment Groundwater
Belmont NC 28012 County Gaston
(GtO (State) lZip)
Contact Person: Sean DeNeale Telephone# [phone]
Well Location/Site Name: Allen Ash Basin No. of wells to be sampled: 13
(from P'."A)
.. x•.e ✓ ...- .. a-s -.,.. .....,, _._ .•.:�.. r,�::..,._ _ -.
Monitoring Well Construction lntormation
Units
Well ID Number (From Permit)
AB-iR
ABAS
AB-4D
AB-11D
AB-125
AB-120
AB-13S
AS-13D
AB-14D
AS-9S'
AB-9D'
AS-105'
AS-100'
MW-
MW-
Nl
MW-
MW-
Well Depth [ft below land surface)
it
70.89
22.38
49.99
2053.
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]
it
2.29
2.52
2.19
2.68
205
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
20
2.0
2.0
2.0
2.0
2.0
2.0
Screen Top [h below land surface]
it
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 [it below land surface]
ft
70.99
22.38
49.99
20.53
23.58
96.53
21.97
72.20
29AS
21.01
115.23
18.41
6244
Relative Measuring Point Elevation
ft
675.86
6SO.46
649.17
618.07
651.69
651.75
648.72
648.54
641.80
582.73
582.72
575.05
S74.97
Sampling Information and Field Analyc(s
CHECK If DRY WELL AT TIME OF SAMPLING
❑ DRY
❑ DRY
❑ MY
❑ DRY
Q DRY
❑ DRY
❑ DRY
❑ nRr
❑ DRY
L] oar
❑ DRY
[j nay
❑ DRY
C] DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
15A-ZL
Units
AS-1R
AB-4S
AR-40
AB-11D
AB-125
AB-12D
AB•13S
AB-130
AB-14D
AB-9S•
AB-9D'
AS-105•
AB-10D'
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
4.6S
5.25
2.85
2.65
5.30
Temperature (00010)
deg. C
15.6
15.3
16.1
13.6
14.5
15.5
1S.9
1S.0
15.8
17.1
17.6
15.0
15A
Odor(00085)
None
None
None
None
None
None
None
None
None
None
None
None
None
Appearance
Normal
Normal
Normall
Normal
Normal
Normal
Normal
Normal
Normal
Normall
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)
mg/L
8.1
0
3.85
0.241
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 Cond - field (00094)
umhos/cm
367
127
122
114
25
154
97
147
160
223
253
177
157
Water Level [ft below measuring pt.] (82546)
it
53.29
7.78
6.49
5.92
10.3
9.06
5.48
5.94
12-99
11.52
14.34
8.89
8.99
H - field 00400
6.5-9.5
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' nformatlon=
Laboratory Name
Sample Analysis Date
Duke Energy Analytical Laboratory
Certification #
NC DENR # 248
Samples for metals were collected unfiltered: ❑, Yes ❑ No
and field acidified: Yes ❑ No
March 4 - 11, 2016
IMACL
15A-21.
Units
AB-1R
A8-45
ABAD
AB-11D
AB-125
AB-12D
AB-135
A11-13D
AB-140
AS-95'
AB-9D•
AB-10S•
AB-30D'
MW
MW-
MW
MW-
MW-
TDS - Total Diss. Solids (70300)
---
Soo
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
504 - Sulfate (00945)
2SO
mg/I
130
12
4.4
0.43
0.13
S
1.2
0.64
32
39
47
17
24
Nitrate (1,103) as N (D0620)
10
mg/1
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
<i
<1
<1
<1
<1
<1
<1
<1
<i
<1
<1
<1
<1
Cr -Chromium (01034)
---
10
ug/I
<5
<5
6
<5
<5
<5
<S
<5
<5
<5
<5
<5
6
Cu _ Copper (01042)
---
1
mg/I
<0.005
<O.00S
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
ug/I
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
0A
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
Mn - Manganese (01055)
-
50
ug/I
8
49
<5
5
132
6
57
37
40
9520
18
557
33
Ni- Nickel(01067)
100
ug/I
<S
<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/1
<0.005
<0.005
0.01
<0.005
0.009
<0.005
0.009
0.00S
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/I
<O.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(0)
2,54(0)
2.5 (B)
1.92 (B)
2.56 (B)
2.49(8)
2,45(8)
2 (8)
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/1
52.2
35
22.2
56.6
<5
55.2
24.8
34.9
13.1
53
93.6
67.5
44.4
AI - Aluminum (01105)
--
NE
ug/I
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 -Calcium (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.S3
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
1.49
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
TSS- 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
DA42
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
0.188
0.184
Turbidity is field analyzed for information use only.
NE - Not Established BOLD values equal or exceed the corresponding 2L standard Notes: (B) Apparent sample contamination / Sb detected ,n field blank at a concentrat- of 3.11 ug/.
I certify that, to the best of my knowledge and belief, the information submitted in this report is tnieT accurate, and complete, and that the laboratory analytical data was produced using approved methods ofanalysis by a DWQ-cerlified laboratory. I am aware that there are significant penalties for submitting false information, including the possibility of fines
and imprisonment for knowing violations.
P. Brent Dueitt / GM II Carolinas West / Plant Allen
Permittee (or Authorized Agent) Name and Title - Please print or type Signature of Permittee r Authorized Agent) Date
.. ••-+..��n vvr wu a t ne nw,aaa wrre teaunv m w v, cvii, ana zU12; however NLIJLQ has not established • Well located Inside of compliance boundary
a ZL for these constituents as described in i5A NCAC 02L.0202 (c). For this reason,
IMACs noted on the report are for referenre nnly

Water Resources
ENVIRONMENTAL QUALITY
Michael Ruhe
Duke Energy Carolinas LLC
PO Box 1006
Charlotte, NC 28201-1006
PAT MCCRORY
Governor
DONALD R. VAN DER VAART
sem marl
S. JAY ZIMMERMAN
Dr/ ectol'
March 31, 2016 RECEIVED/NCDENR/DWR
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:
APR 4 2016
WQROS
MOORESVILLE PECIONAL OFFICE
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://deg.nc.goy/about/divisions/water-resources/edmr/npdes-electronic-reporting or contact Vanessa
Manuel at 919-807-6392 or via email at [e-mail].
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 111 —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,
J e, f re,9 O. pa">a4-F
forS. Jay Zimmerman, P.G.
Enclosure: NPDES Permit Standard Conditions Part III - Addendum
Cc: NPDES File
Central Files
kJo v#Ie-Wal Office / Water Quality Program

PAT MCCRORY
r:a
Water Resources
ENVIRONMENTAL QUALITY
March 4, 2016
CERTIFIED MAIL 7013 2630 0001 8998 4247
RETURN RECEIPT REQUESTED
Mr. Harry K. Sideris, Senior Vice President - Environmental, Health & Safety
Duke Energy
526 South Church Street
Mail Code EC3XP
Charlotte, North Carolina 28202
Governor
DONALD R. VAN DER VAART
Secretary
S. JAY ZIMMERMAN
Director
RECEIVED/NCDENR/DWR
MAR 10 2016
WQROS
MOORESVILLE REGIONAL OFFICE
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 [phone].
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 QFILE
Pat McCrory
Governor
Mr. Brent Dueitt, General Manager H
Regional Stations
Duke Energy Carolinas, LLC
253 Plant Allen Road
Belmont, North Carolina 28012
Dear Mr. Dueitt:
Donald van derVaart
Secretary
October 13, 2015
Subject: Compliance Biomonitoring Inspection
Duke Energy Carolinas Allen Steam Station
NPDES Permit No. NC0004979
Gaston County
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 [phone], or at [e-mail].
Enclosure:
Inspection Report
cc: MSC 1617-Central Files/Basement
Gaston County Health Department
no
Sincerely,
r Michael L. Parker, Regional Supervisor
Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources, DEQ
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°A 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 1ti 1 2 15 1 3 I NC0004979 I11 12 15/10/06 17 181 B 1 19 I G j 201 I
21111111 11111111111 1111111 111 III I I I I I I I I I II 166
Inspection
Work Days Facility Self -Monitoring Evaluation Rating 131 CIA -------Reserved--------
67
12.0 70 J j 71 I„ I 72 1 N � 731 1 174 751 III I I � I80
LJ LJ 1 I I
Section B: FacilityData
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 GantUORC/704-829-2587/
Name, Address of Responsible Official/Ti le/Phone and Fax Number
Contacted
P Brent Dueitt,253 Plant Allen Rd Belmont NC 28012/General Manager II/704-829-2400/
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit Flow Measurement Operations & Maintenance Records/Reports
Self -Monitoring Program Sludge Handling Disposal 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 Inspe , (s) Agency/Office/Phone and Fax Numbers Date
Wes Bell , MRO WQ/604-663-1699 Ext.2192/ f � -7
iii
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
31 NC0004979 I11 12 15/10/06 17
Inspection Type
18 iBi
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Page#

Permit: NC0004979 Owner - Facility: Plant Allen Steam Station
Inspection Data: 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
E
❑
❑
❑
application?
Is the facility as described in the permit?
0
❑
❑
❑
# Are there any special conditions for the permit?
0
❑
❑
❑
Is access to the plant site restricted to the general public?
0
❑
❑
❑
Is the inspector granted access to all areas for inspection?
M
❑
❑
❑
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 Keegina
Yes No NA NE
Are records kept and maintained as required by the permit?
M
❑
❑
❑
Is all required information readily available, complete and current?
M
❑
❑
❑
Are all records maintained for 3 years (lab. reg. required 5 years)?
M
❑
❑
❑
Are analytical results consistent with data reported on DMRs?
M
❑
❑
❑
Is the chain -of -custody complete?
M
❑
❑
❑
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?
M
❑
❑
❑
Has the facility submitted its annual compliance report to users and DWQ?
❑
❑
M
❑
(If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified operator
❑
❑
M
❑
on each shift?
Is the ORC visitation log available and current?
E
❑
❑
❑
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?
0
❑
❑
❑
Is a copy of the current NPDES permit available on site?
M
❑
❑
❑
Facility has copy of previous year's Annual Report on file for review?
❑
❑
0
❑
Page# 3

Permit: NC0004979
Inspection Date: 10/06/2015
Record Keeping
Owner - Facility: Plant Allen Steam Station
Inspection Type: Bioassay Compliance
Yes No NA NE
Comment: The records reviewed durinq 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
❑
❑
❑
Are all other parameters(excluding field parameters) performed by a certified lab?
M
❑
❑
❑
# Is the facility using a contract lab?
0
❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
0
❑
❑
❑
Celsius)?
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? ❑ ❑ 0 ❑
Incubator (BOD) set to 20.0 degrees Celsius +/-1.0 degrees? ❑ ❑ 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
❑
❑
❑
Is proper volume collected?
N
❑
❑
❑
Is the tubing clean?
❑
❑
M
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
❑
❑
M
❑
Celsius)?
Is sampling performed according to the permit?
0
❑
❑
❑
Comment: The subiect permit requires qrab 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?
❑
❑
M
❑
Is sample collected below all treatment units?
M
❑
❑
❑
Is proper volume collected?
0
❑
❑
❑
Is the tubing clean?
❑
❑
0
❑
Page# 4

Permit: NC0004979 Owner - Facility: Plant Allen Steam Station
Inspection Date: 10/06/2015 Inspection Type: Bioassay Compliance
Effluent Samplina Yes No NA NE
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees ❑ ❑ 0 ❑
Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type ❑ ❑ ❑
representative)?
Comment: The_subiect permit requires effluent grab samples.
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? 0 ❑ ❑ ❑
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable ❑ ❑ 0 ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment: The facility was not generatina 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.
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?
❑
❑
0
❑
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?
0
❑
❑
❑
Are all pumps operable?
N
❑
❑
❑
Are float controls operable?
0
❑
❑
❑
Are audible and visual alarms operable?
❑
❑
0❑
# Is basin size/volume adequate?
0
❑
❑
❑
Comment:
Chemical Feed
Yes No NA NE
Is containment adequate?
0
❑
❑
❑
Is storage adequate?
0
❑
❑
❑
Are backup pumps available?
N
❑
❑
❑
Is the site free of excessive leaking?
N
❑
❑
❑
Comment:
Secondary Clarifier Yes No NA NE
Page# 5

Permit: NC0004979
Inspection Date: 10/06/2015
Owner - Facility: Plant Allen Steam Station
Inspection Type: Bioassay Compliance
Secondary Clarifier
Yes No NA NE
Is the clarifier free of black and odorous wastewater?
0
❑
❑
❑
Is the site free of excessive buildup of solids in center well of circular clarifier?
0
❑
❑
❑
Are weirs level?
E
❑
❑
❑
Is the site free of weir blockage?
N
❑
❑
❑
Is the site free of evidence of short-circuiting?
0
❑
❑
❑
Is scum removal adequate?
❑
❑
❑
Is the site free of excessive floating sludge?
❑
❑
❑
Is the drive unit operational?
0
❑
❑
❑
Is the return rate acceptable (low turbulence)?
M
❑
❑
❑
Is the overflow clear of excessive solids/pin floc?
N
❑
❑
❑
Is the sludge blanket level acceptable? (Approximately % of the sidewall depth)
M
❑
❑
❑
Comment:
Flow Measurement - Influent
Yes No NA NE
# Is flow meter used for reporting?
0
❑
❑
❑
Is flow meter calibrated annually?
0
❑
❑
❑
Is the flow meter operational?
0
❑
❑
❑
(If units are separated) Does the chart recorder match the flow meter?
❑
Cl
0
❑
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 5/10/2015 by the on -site
wastewater staff.
Solids Handling Equipment
Yes No NA NE
Is the equipment operational?
0
❑
❑
❑
Is the chemical feed equipment operational?
N
❑
❑
❑
Is storage adequate?
N
❑
❑
❑
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?
❑
❑
❑
0
The facility has an approved sludge management plan?
M
❑
❑
❑
Comment: The FGD WWTS 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
Inspection Date: 10/06/2015
Owner - Facility: Plant Allen Steam Station
Inspection Type: Bioassay Compliance
Solids Handlina Equipment Yes No NA NE
Flow Measurement - Effluent
Yes No NA NE
# Is flow meter used for reporting?
❑
❑
❑
Is flow meter calibrated annually?
❑
❑
EEI
Is the flow meter operational?
❑
❑
❑
(If units are separated) Does the chart recorder match the flow meter?
❑
❑
M
❑
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?
M
❑
❑
❑
Are the receiving water free of foam other than trace amounts and other debris?
0
❑
❑
❑
If effluent (diffuser pipes are required) are they operating properly?
❑
❑
0
❑
Comment: No discharges were observed from Outfalls 002A, 002B, and 005-Cinternal) 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
�;' ENERGY.
.ARC}LIMAS
December 29, 2015
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Allen Steam Station
253 Plant Allen Road
Belmont, NC 28012
RECEIVED/NCDENR/DWR
JAN 12 2016
WQROS
MOORESVILLE REGIONAL OFFICE
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 Pduke-enerRv.com.
Sincerely,
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

F'r
GROUNDWATER QUALITY MONITORING
COMPLIANCE REPORT FORM osvAlziiHEwYoc€rlvirioriiuefiraCoiiaim '' '' ' -
FACILITY INFORMATION Please Print dearly or Type 36YT 1•EHYlCE G NC 276 17 e:
Fadllty Name: Allen Steam Station
Permit Name (if different): Duke En Cardinal, LLC Permk Type: NPDES Expiration Date: 5/31/2015
Fadlity Address: 253 Plant Allen Road PERMIT Number: N00004979
(Street) TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impound Groundwater �;
B cdy) NC 28012 County Gaston ECc- %Cr;FNR/DW
ICnYI (state) (ZIP)
Contact Person: Sean DeNeale Telephone# [phone]j�
WeN Location/Site Name: Allen Ash Basin No. of wells to be sampled: 13
(fromPermit)
..
{ 1,• �-. ; •,F, . ,i:% <-y.. ^" "�,�;,'«`r/M,?,� its{ _ _J ,� ._ ..r -�
Well ID Number (From Permit) L_�f
Units AB-IR A8.4S A8 4D AB-11D AB-12S AS-12D AS-13S AB•13D AB.14D AB-9S• A6-90• AS-10S• AB-IOD• MW-
WeBDepth ft below land surface) ft 70.89 22.38 49. 99 20.53 23.58 96.
Measuring Point (rocft above land surface) 21.97 72.20 29.45 21.01 115.23 18.41 62.44 MW- MW- MW' MW-
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 10
Screen Top Ift below land surface It 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 M�eai.sau>riz"n� P...o, :. W. .. .= ... .>. r, �:bp+, r r..::.''.•,�1 :;•` '' f�^i6. r .,.^';r „rv..:::.... Y �' ;^;;��.�:sir• , 20.53
651.75a.69 6 643.80 56273 5827264872 64574 97575,05
B wJ' 23.58 -96.53 21..97 ft 72.20 29int Elevation .45 21.01 115.23 18.41675 66 65046 649.17 62.44
CHECK IF DRY WELL AT TIME OF SAMPLING
❑ DRY
❑oar
❑DRY
❑oar
❑ DRY
❑ DRY
❑ DRY
r
' t
` z '
`' !"'t.
zr
y' K,", .•: �.� +�`sa
❑ DRY ("❑ DRY
ir'
❑ DRY^
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
Sample Date
Volume of Water pumped/baRed
15A-2L
units
AB•1R
11/06/2015
1.95
AB-4S
11/06/2015
4.95
AS-40
11/06/2015
A15-110
11/06/2015
AB-12S
11/06/2015
AB-120
11/06/2015
AB-13S
11/06/2015
AB-13D
11/06/2015
AB-140
il/06/2015
A&98•
11/-9S* 5
AB 9D'
11/06J2015
AB 105•
11J06 2015
AB 100•
Si/06/2015
MW-
MW
MW-
MW-
Temperature
C
16.6
17.4
2S.30
5.20
2.7
18.75
7.50
2.15
4.45
3.15
3.8S
3.00
7.15
odor
Odor(00085
(00 85)
None
None
16.3
17.0
16.1
15.8
17.6
17.7
16.4
20.9
18.7
17.9
16.7
Appearance
Normal
Normal
None
Normal
None
None
None
None
None
None
None
None
None
None
Turbidity(82078
iITU
2.95
9.16
Normal
Normal
Normal
Normal
Normal
Normal
Normal:Normal
Normal
Normal
Dissolved 00300
Oxidation Reduction Potential 00090
Specific Cond - field 00094
mV
umhos/an
7.91
356
300
1.29
396
132
1.89
4
441
8.13
2.05
363
8.75
3.12
444
6.82
4.89
399
4.32
1.26
397
41.6
2.36
3S5
9.16
2.S4
421
4.47
4.47
206
7.78
7.78
2S7
9.78
9.78
309
11.5
0.15
311
131 115 24 157 94 147 127 244 255 176 158
Water Level ft below measuring.) (82846 ft 55.98 13.91 12.61 9.39 15.43 14.62 10.71 11.34 16.27 1 244 1255 176 7.7
H - field 00400 6.5 -8.5 Su 6.51 y 6.0 6.0 6.0 5.1 .62 .71 .34 .37 .16 .37 .63 7.3
�'a..?r - - ..� �te•.. ,�?e.`Y B .: .wadi Y.t:., .. .f .. '.� '
laboratory Name Duke Energy Analytical Laboratory
Sample Analysis Date November 6. 10, 2015 Certification # NC DENR # 248 Samples for metals were collected unfiltered: Yes ❑ No
and field addified: 0 Yes O No
IMAC 15A-2L Units AB-iR A8.45 AB-40 Abi1D AB-125 All-12D 14-13S AS-130 AB-14D TDS- TotalDks. Solids 70300 500 m 210 42 110 91 25 120 72 MW MW-
140 110 Ab9S• 130 A54D• 280 AB-lOS• A8-100• MW- MW- MW-
97 140
Cl -Chloride 01002) 250 0.<1 <1 <1 <1 2.8 4.8 9.2 6.8 7.8 9.9 8.5 11 8
As-ArseMc(01002 10 <3 <i <1 <3 <1 <1 <1 <1 <1 <1 <1 <1 <1
SO4 - sulfate (00%S) 2S0 89 12
Nitrate NO3►asN 00620
SO
0.08
3.2
2.7
0.49
0.12
4.9
0.9
0.79
12
37
43
19
22
Cd • Cadmium 01027
-
- 2
10
MAP I
<1
<5
<1
<5
2.6
<3
7
0.05
<3
c5
0.05
<3
<5
1.9
2.2
1.7
0.64
<0.023
0.05
0.06
<0.023
Cr-Chromium 01034
<1
<5
<3
<i
<i
<i
<i
Cu- (01042
1
c0,005
d).ODS
0.015
<0.005
<0.00S
<5
<5
<5
<5
6
Fe - Iron 01045
-
300
133
414
19
235
549
<0.005
0.049
049
<0.005
<0.005
c0.005
<0.006
Mercury(73900
1
<0.05
<0.05
<0.05
c0.05
c0.05
241
W.OS
b2143
7010
424
650
652
Mn - Manganese 01055
SO
7
5
<5
<5
53
6
<0.05
<0.05
<0.05
<0.05
c0.05
Nickel 01067
Pb - Lead 01051
Zn -Zinc 01092
Be - Barium 01
-
100
15
1
TOO
m
c5
<1
<0.005
56
<5
<2
c0.ODS
33
5
<S
0.009
30
<5
<i
<0.005
41
<5
<1
<0.005
41
<S
<S
<0.005
48
<50
<0.2
<1
<3
61.2
235
<3
0.01
S2
160
%20
d
22
<5
4"NI-
<5
<S
<3
<1
<3
<1
<1
<S
0.006
<0.005
<0.005
<O.005
<0.005
c0.005
8-Boron 01022
A -Thallium 01059)
Sb- Art
(0114Hmon (01097)
Alkalinity -100410
AI -Aluminum (01105)
012
1
-
-
-
7pp
NE
NE
20
NE
NE
u
I
<50
<0.2
1.1
<1
49.9
139
c50
<0.2
1.07
<1
28.7
494
<50
<0.2
1.04
<1
39.7
12
<50
c0.2
1.11
<1
46.8
329
<SO
<0.2
<1
<2
<5
609
42
65
69
168
29
49
38
<50
<0.2
<50
<50
684
552
<50
<50
<0.2
<0.2
<0.2
<0.2
<0.2
<0.2Se-Selenium
1.D5
1.24
<i
lA5
1.07
1.05
<3
<1
17.4
159
<1
52.6
<1
18.4
<1
58.7
2.4
62
<1
43.4
<1
39.1
Be- Beryllium01012
HCO3 - Bicarbonate (00440)
Ca•Caldum 00916
CO3-Carbonate(0044S)
Cc - Cobalt 0103
Mg - M um 0092
fNo - enum 03062
K - Potassium 00937)
Na • Sodium Bids (
TSS-TOUISu .Solids 0031
V - Vanadium (01
Sr-Strontlum(01082►
4
-
-
1
-
-
0.3
-
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
u
t
I
u
MLA
I
I
mgA
<1
49.9
38
6
<1
7.43
<2
2.24
7.44
<5
2.51
0.398
<1
I8.7
7.97
<5
<1
5.11
1.04
5.61
5.59
c5
1.41
0.041
<1
39.7
12
<5
<1
3.44
<1
1.5
7.25
<5
4.17
0.176
<1
46.8
8.61
<5
ci
3.14
<3
2.46
8.8
<5
2.22
0.116
<1
c5
0.256
<S
<1
1.08
<1
0.92
2.21
21
1.19
<0.005
<1
61.2
16.3
c5
<1
4.37
<I
2.42
7.48
8
3.98
0.177
<1
17.1
8.69
<S
<1
3
<i
1.25
5.29
<5
1.34
0.053
1810
296
64
397
545
607
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
52.6
18.4
58.7
62
43.4
3
14
<5
5.13
<5
<5
11.3
<5
28
<S
11
<5
14.6
<5
1
18.2
7.<5
<1
1.<5
61
ci
4.2
2.12
6.04
6.44
5.2
3.6
<1
8.01
<i
<1
<3
cl
2.28
1.74
1.1
2.32
1.59
1.52
9.55
13.4
11
11.1
13.2
.2
9.22
37
37
8
<5
<S
8
c5
11.4
0.195
0.8a
0.078
c .31
0.147
7.?
0.:1
1.12
0.16
6.<5
62
0.194
NE + Not Estabishad BOLD values equal or exceed the CORISpondhlg 2L standard Turbidity Is radd analood for information use only.
No"': 'Wei b bated inside of the estabishrd compliance boundary.
• 11710
P. Brent Dueitt / GM II Carolinas West / Plant Allen
Permlttee (or Authorized Agent) Name and Title - Please print or type
Signature of Permktee (or Authorized Agent Date
GW-59CCR 09/2015 1-The IMACs were issued in 2010, 2011, and 2012; however NCOEQ has not established
• 11 L- � �_-.r
ICE
- .1 rw,, vas.sscvc tcl. rot tms reason,
IMACs noted on the report we for reference only.

PPPPP0V_
To:
Division of Water Resources
November 19, 2015
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
Test Concentrations
Test Result
Control Survival
Control Mean Reproduction
Test Treatment Survival
Treatment Mean Reproduction
First Sample pH
First Sample Conductivity
First Sample Total Residual Chlorine
Second Sample pH
Second Sample Conductivity
Second Sample Total Residual Chlorine
3-Brood Ceriodaphnia dubia chronic pass fail
20%
Pass
92%
23.25 neonates
92%
23.0 neonates
7.21 SU
306 micromhos/cm
<0.10 mg/L
7.23 SU
309 micromhos/cm
<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 [phone].
Basin: CTB34
cc: Central Files
Wes Bell (MRO)
Aquatic Toxicology Branch Water Sciences Section

OBO,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
Carol. [e-mail]
Mailing: 1623 Mail Services Center, Raleigh, NC 27699-1623
Physical: 4401 Reedy Creek Road, Raleigh, NC 27607
• +p
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

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. ***
Thanks for the information. Does the Electrical & Instrumentation Group do the calibration?
Wes
From: Gantt, Michael R [mailto:[e-mail]]
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. 1 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

DINEr__
EML RGY DMS
CAROLINAS
JAN 5 K'`5
December 15, 2014 MOOF,
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
�n Allen Steam Station
1� \ 253 Plant Allen Road
Belmont, NC 28012
704-829-2350
704-829-2370 (fax)
f?E7CP11/'Et)
OP. 22 M4
lNfpR D NPROCe
NGW77
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
22��
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: DEPARTMENT OF ENVIRONMENT& NATURAL RESOURCES
COMPLIANCE REPORT FORM DIVISION OF WATER QUALITY- INFORMATION PROCESSING UNIT
-•y _ 1617 MAIL SERVICE CENTER, RALEIGH, NC 27699-1617 Phone: [phone]'K
FACILI7 r 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:1 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: Steve Cahoon Telephonek 1 919-546-7457
Well Location/Site Name: Allen Ash Basin No. of wells to be sampled: 13
(from Permit)
Monitoring Well Construction Information
Units
Well ID Number (From Permit)
AB-111
AB-4S
AB-4D
AB-11D
AB-12S
I 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
23.581
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
675.861
650.46
649.171
618.07
651.69
651.751
648.721
648.541
641.80
Sampling Information and Field Analysis
CHECK IF DRY WELL AT TIME OF SAMPLING
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
15A-21.
Units
AS-111
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-
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
15.51
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)
2.9
7.8
2.0
11.7
5.6
2.7
6.7
1.9
5.8
Dissoved Oxygen (00300)
8.2
1.7
4.0
1.1
0.8
4.7
2.0
2.2
3.0
Oxidation Reduction Potential (00090)
ZS
448
346
389
388
422
370
487
438
408
Specific Cond - field (00094)
304
152
127
115
26
156
81
154
139
PH - field (00400)
6.5 -
6.41
6.11
5.91
5.91
5.01
6.41
5.51
6.31
5.4
Laboratory Information
Laboratory Name
Sample Analysis Date
Duke Energy Analytical Laboratory
Certification 4
NC DENR q 248
Samples for metals were collected unfiltered: El Yes El
and field acidified: 0 Yes ❑ No
15A-2L
Units
AB-111
AB-45
AB-4D
AB-11D
AB-12S
AB-12D
AB-13S
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
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
Cl - 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
s0
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/1
<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
<0.00S
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:
possibilityI certify that, to the best of my knoWedge and belief, the information submitted in this report is true, accurate, and complete, and that the laboratory analytical data was produced using approved methods ofanalysis by a DWQ-certified laboratory. I am aware that there are significant penalties for submitting false information, including the
Eric Matthews / GM II - PG Carolinas West/ Plant Allen
Permittee (or Authorized Agent) Name and Title - Please print or type Signatur of Permittee (or Authorized Agent) Date
uw-:)tPt-Lk uo/zui.4

Bell, Wes
From: Scruggs, Don [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
dL0/V 0 / /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,
D04 sewer
Environmental Field Support
Allen Steam Station
704 829-2423 Office
704 400-3005 Cell

12
DUKE
ENERGY
August 11, 2014
State of North Carolina
Department of Environment and Natural Resources
115CE IVED
DIVISION OF WATER QUALITY
AUG 2 5 2014
Allen Steam Station G,t
Q`O.N
253 Plant Allen R �i�ORESVILLERWGIO4AL OF Ir.,5
Belmont, NC 28012
704 829-2423
Division of Water Resources RECEIVED
Processing Unit R
1617 Mail Service Center
Raleigh, North Carolina 27699-1617 AUG 2 0 2014
Subject: Duke Energy Carolinas LLC — Allen Steam Station WATER QOAL1I Y ,�EC1IUly
Groundwater Quality Monitoring — Compliance Report Form INFORMATIONPROrp pjNf=tINr'
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-1 OS, and AB-1 OD 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,
0"
Allen Stowe
Water & Natural Resources
cc: Debra Watts
Attachments

OUNDWATER QUALITY MONITORING: DEPARTMENT OF ENVIRONMENT & NATURAL RESOURCES
COMPLIANCE REPORT FORM DIVISION OF WATER QUALITY- INFORMATION PROCESSING UNIT
-0 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: s/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 F Ash Impoundment Groundwater
Belmont NC 28012 County Gaston
(City) (State) (zip)
Contact Person: Allen Stowe Telephone# [phone]
Well Location/Site Name: Allen Ash Basin No. of wells to be sampled: 13
(from Permit)
Monitoring Well Construction Information
Units
Well ID Number (From Permit)
ABAR
AB-4S
AB-4D
AB-11D
AB-12S
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 1
675.861
650,461
649.171
618.071
651.691
651.751
64&721
648.541
641.80
Sampling Information and Field Analysis
CHECK IF DRY WELL AT TIME OF SAMPLING
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
❑ DRY
15A-2L
Units
AB-1R
AB-4S
AB-4D
AB-11D
AB-12S
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
3051
3401
346
390
3311
4781
445
375
Specific Cond - field (00094)
umhos/cm
2301
1391
1301
1141
261
1511
881
1611
146
pH - field (00400)
6.5 - 8.5
SU
6.21
6.11
5.91
5.81
4.91
6.41
5.51
6.11
5.3
Laboratory Information
Laboratory Name
Sample Analysis Date
Duke Energy Analytical Laboratory
Certification q
NC DENR # 248
1
Samples for metals were collected unfiltered: 0 Yes ElNo
1 and field acidified: Yes ❑ No
July 8 - 24, 2014
15A-2L
Units
AB-111
AB-4S
AB-4D
AB-11D
AB-12S
AB-12D
AB-13S
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)
30
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
<11
<1
<1
Cl - 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 1
1 mg/I
1 <0.005
<0.005
0.014
<0.005
<0.005
<0.005
0.008
<0.005
<0.005
Al - Aluminum (01105)
ug/I
NAI
NAI
NA
NA
NA
NA
NAI
NA
NA
Turbidity is field analyzed for information use only.
BOLD values equal or exceed the corresponding 2L standard Notes:
possibilityI 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 submitfing false information, including the
Eric Matthews / Station Mgr - PG Carolinas Wester <% J
Permittee (or Authorized Agent) Name and Title - Please print or type signs ure of Permittee (or Authorized Agent) Date
GW-59CCR 06/2014

AG�RA
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
NOTICE OF DEFICIENCY
June 13, 2014
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Duke Energy Corporation
Attention: Mr. Sean DeNeale, Engineer II
Environmental Services
Post Office Box 1006
Mail Code EC 13K
Charlotte, North Carolina 28201-1006
Duke Energy Corporation
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:
7011 1570 0000 0154 7357
7011 1570 0000 0154 7364
John E. Skvarla, III
Secretary
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

Duke Energy Corporation
June 13, 2014
Page 2 of 2
Allen Active Ash Basin Dam
GASTO-061
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
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 [phone]. 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 Dam Safety Engineer

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
NOTICE OF DEFICIENCY
June 13, 2014
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Duke Energy Corporation
Attention: Mr. Sean DeNeale, Engineer II
Environmental Services
Post Office Box 1006
Mail Code EC 13K
Charlotte, North Carolina 28201-1006
Duke Energy Corporation
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:
7011 0570 0000 0154 7333
7011 1570 0000 0154 7340
John E. Skvarla, III
Secretary
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: hUp:Hportal.ncdenr.org/web/Ir/land-quality
An Equal Opportunity / Affirmative Action Employer— 50% Recycled / 10% Post Consumer Paper

Duke Energy Corporation
June 13, 2014
Page 2 of 2
Allen Retired Ash Basin Dam
GASTO-016
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 [phone]. 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 Dam Safety Engineer

0
Bell, Wes
From: Stowe, Allen [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 n� ;drn-I �; aoc 3�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.
Doa Suru"c
Environmental Field Support
Allen Steam Station
704 829-2423 Office
704 400-3005 Cell

Xja
RIV
NCDENR
North Carolina Department of Environment and
Division of Water Resources
Water Quality Programs
Pat McCrory Thomas A. Reeder
Governor Director
December 3, 2013
Mr. Allen Stowe, Water Management
Duke Energy
Post Office Box 1006/EC 13K
Charlotte, North Carolina 28201-1006
FILE n1*1
Natural Resources /
i
Subject: Compliance Evaluation Inspection
Allen Steam Station
NPDES Permit No. NC0004979
Gaston County
Dear Mr. Stowe:
John E. Skvarla, III
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 [phone] or at wes.bell a ncdenr.gov.
Sincerely,
Michael L. Parker
Supervisor
Water Quality Regional Operations Section
Enclosure:
Inspection Report
cc: Gaston County Health Department
W.
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.ncwaterqualfty.org
NorthCarolina
Naturally
An Equal Opportunity t Affirmative Action Employer — 30% Recycled110% Post Consumer paper

4
United States Environmental Protection Agency
Form Approved.
EPA Washington, D.C. 20460
OMB No. 2040-0057
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 INI 2 (5� 31 NC0004979 111 121 13/11/21 117 181 C I 19I S I 20I
1-
Remarks
21111111111111111111111111111111111111111111111116
Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA --------------------------- Reserved ------------ ---------
67I 1.5 169 70I 4 I 71 I N I 721 N I 73 LLJ 74 751 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)
09:40 AM 13/11/21
11/03/01
Plant Allen Steam Station
Exit Time/Date
Permit Expiration Date
NCSR 2525
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 Operations & Maintenance Records/Reports
Self -Monitoring Program Sludge Handling Disposal 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 Ipgpector(s) Agency/Office/Phone and Fax Numbers Date
Wes Wes Bell U�V.� I //� MRO W0//704-663-1699 Ext.2192/
Marcia Allocco �— MRO WQ//704-663-1699 Ext.2204/
ignature 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

Y _ � ?
a
NPDES yr/mo/day Inspection Type
3I NC0004979 � 11 12I 13/11/21 17 18I d '
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
tl
. 4
1
c
7N
V_
r2 . ;s
ie
9 _
h
1 �T,
1Page # 2
- arFl` In .'C .. t F .�g :�. �y �,y+Fi-, 1 lr ��yy� •�j �� _ y Z

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? 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: 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? ■ 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 ■
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 In ■ n
(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? ■ n n In
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 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
Inspection Date: 11/21/2013
Owner - Facility: Plant Allen Steam Station
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?
■ 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 ■ o
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?
n
n
■
o
Is sample collected above side streams?
■
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 sampling performed according to the permit?
■
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
n
■
o
Is sample collected below all treatment units?
■
n
n
n
&I
Page # 4

PV
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? ❑ ❑ ■ 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 subject permit requires effluent grab samples.
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: 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
■
o
Is the basin free of bypass lines or structures to the natural environment?
■
n
n
n
Is the basin free of excessive grease?
■
n
n
n
Are all pumps present?
■
n
n
n
Are all pumps operable?
■
n
n
n
Are float controls operable?
■
n
n
n
Are audible and visual alarms operable?
n
n
■
o
# Is basin size/volume adequate?
■
n
n
n
Comment:
Chemical Feed
Yes No
NA
NE
Is containment adequate?
■ o
n
n
Is storage adequate?
■ n
n
n
Are backup pumps available?
■ n
n
n
Is the site free of excessive leaking?
■ n
❑
n
Comment:
Secondary Clarifier
Yes No
NA
NE
Page # 5

Permit: NC0004979
Inspection Date: 11/21/2013
Owner - Facility: Plant Allen Steam Station
Inspection Type: Compliance Evaluation
&I
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?
■
n
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)?
■
F1
n
n
Is the overflow clear of excessive solids/pin floc?
■
n
n
n
Is the sludge blanket level acceptable? (Approximately % 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?
■
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: 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
F1
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
n
n
■
The facility has an approved sludge management plan?
■
n
n
n
Page # 6

Permit: NC0004979
Inspection Date: 11/21/2013
Owner -Facility: Plant Allen Steam Station
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. W00000452.
Flow Measurement - Effluent
Yes
No
NA
NE
# Is flow meter used for reporting?
n
n
■
0
Is flow meter calibrated annually?
n
n
■
n
Is the flow meter operational?
0
n
■
n
(If units are separated) Does the chart recorder match the flow meter?
n
n
■
n
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 Pine 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: 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
Doac .Suwyyc
Environmental Field Support
Allen Steam Station
704 829-2423 Office
704 400-3005 Cell

FILE
NCDENR
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 Outfall 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,
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.orglweblwq NaAM1911Y
An Equal Opportunity 1 Affirmative Action Employer— 300% Recyciedl10% 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 3rd, 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.
Dog SCWW
Environmental Field Support
Allen Steam Station/Lower Catawba Hydro
704 829-2423 Office
704 400-3005 Cell
nc;��n4- 01 ?3 00,20�

PPP7 PP -,
-�►0L6
Collection System SSO 24-Hour Notification
iA,
} Collection System: Number and Name
q
t.:
+ Incident Number from BIMS 20 10 f�73
Incident Reviewed (Date):
c.
Incident Action Taken: BPJ
NOV-2011-DV
DV-2011-
■ ■ • ■ ■ ■ ■ • • ■ ■ ■ ■ ■ ■ ■ ■ ■ e ■ ■ ■ ■ 0 ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ • ■ ■ ■ ■ ■ a ■ ■ ■ ■ ■ ■ ■ ■ ■
Spill Date � / / Time am/ pm
Reported Date 4P. fig. Time 8 � lJ' am/ pm
Reported To SWP Staff or EM Staff
J
Reported By l c� Phone
Address of Spill
Count,
:�& 44U (,0 City
Cause of Spill
,IxeJ
Total Estimated Gallons D6--?) Est. Gal to Stream
Stream Fish Kill: Yes No Number
Species
Non Required Information and other comments relating to SSO incident:
RPsnnnse time minutes Zone Map Quad
Sell?c�u�e -max �y� -comic

�l '
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,
Dos Suwgyc
Environmental Field Support
Allen Steam Station/Lower Catawba Hydro
704 829-2423 Office
704 400-3005 Cell
dr.
1

PDuke
Energy®
Carolinas
June 21, 2012
Ms. Barbara Sifford
ALLEN STEAM STATION
253 Plant Allen Rd.
Belmont, NC 28012
704 829-2423
704 829-2370 fax
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,
st'� / �E�
Eric Matthews
Production Manager
Allen Steam Station

tv
bc. F-,rin Cu lberi F k EC12B
x* ,, Allen Stowe �; :: EC13K
7 1�011 SClL1bS`,+ r
i; r Allen Steam Station.
Brian Weisker 'ems �� 0 Allen Steam Station
� � j ". - , �
Y ,L' Certified Mail:7099 3400 0012 0537 0622
IC�I..-, 1.°..�" �.,! '',�-• ; � v'fl' r, �t r Y °:�� �i, r ? k r YF p
�v Ile
Fn3 f l,-0J � ' I .`v ,may w' E - �e �Ir � V �• � 4.I�.h��` . � -i
f� , _ ..{ rr .F yy ; w •$ � ,f "�� kf Y _ fi s 'x{u�p4-- d�,,� r 1
�s � r x � �R.:. ti �:! '(a � rf`{ � !#s m ^ cf - { { F r,} � rt �' r ��✓ r
�VZ p• � fk' ` - � ``8 ' I '� ,� j[P4 � t}�Ili .••f` p -�4 � i"%Iyfe-..Y.. ql f- r
1 J -
�.�.
}
4 ALq
�+
-
'�
`
r'i'rl Y h �, _ ''v' }'k I i'.IF'r' • +I*F°'
."` r ` INY vim" • 'gi
'jai .'� T�y.•1 �� 5 .Jr - •'r "�1 f
(;.- l .- at J .�'�� {��� `� _� S '� '�+tiKX}�ir`�4 };'" h,.r� �-'-,"�:r.A n►��' r 4��. _ _ r :- _�p�, }•
y},''p�t", # f ,s•_ a `rl 7' . -
'� ''-,i, ,�b,', #1"l•.� ai . ' ''1 ,ty - "''s �+,, ht' f � ' � '�'
IITT � r2 4
_ •2 'a. r��"�4 4r-�i'lsY r • �3 "f ' b�,k.'ki y� � �-�.�t� -���^a � �P�1 � f } r A;.. ��,- � f�Y .L' _, `�
gn-
r
R<
w iV.
f'L ��'�. N�:,r„� M`��-�,.}, w h F i r�-� a r • 4 �� 5�� S '�f.. °i r -y,p, � - �-. .ill
. -0 u '� �k a i, r •s- 3'r?J'•' ..rdl •-:s .:i
� �, w � • t s� r .�, a �� rip. ,.w �� + �� ' + � .T a'_ 6 � �" �� y{7f 'r }r 1 ` r i k i�a
� r q
P.,
�'r� ,�. r^ _ ,l {�'Jd:. y •F - t 1 {ti-�+��, �fi � ' - T �,� �r{+ � F ��� h - x
4e, ,uv_
4 P y
j
.... '•�.4..._::"2 ...dC:1.AY�uL�i sr ..�Tu��..'+L"f'�#.:�'#� _. � ,.. � i`j r.� _x� u�h.. ... s t..,-. �.:".`�''�",'� rlra`�e F _-:�..,._ ��s��.bG:�'.���

pppppp
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:OOam on the 17tn
Dais Svruyya
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 - [e-mail]
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

LE
NCDENR
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
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.
Sincerely,
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
Phone: [phone] Fax: [phone] Customer Service: 1-877-623-6748
Internet: http://portal.nodenr,org/web/wq
An Equal Opportunity �, Affirmative Action Employer - 30% Recycled110% Post Consumer paper
NorthCarohna
Naturally

NCDENR
North Carolina Department of Environment and Natural Resource
Division of Water Quality
Beverly Eaves Perdue Charles Wakild, P.E.
Governor Director
March 6, 2012
Mr. Allen Stowe, Water Management
Duke Energy
Post Office Box 1006/EC 13 K
Charlotte, North Carolina 28201-1006
Subject: Compliance Evaluation Inspection
Allen Steam Station
NPDES Permit No. NC0004979
Gaston County
Dear Mr. Stowe:
FILE,_/
/A
Dee Freeman
Secretary
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 [phone], or at [e-mail].
Sincerely,
for Robert Krebs
Surface Water Protection Regional Supervisor
Enclosure:
Inspection Report
cc: Gaston County Health Department
./:
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.newaterquality.org
NorthCarolina
Naturally
An Equal Opportunity 1 Affirmative Action Employer — 309% Recycledl10% Post Consumer paper

United States Environmental Protection Agency
Form Approved.
EPA Washington, D.C. 20460
OMB No. 2040-0057
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 INI 2 15 I 31 NC0004979 111 121 12/03/01 117 18I C I 19 I S I 20I II
Remarks
2111111111 1111111111111111111111111111111111111H6
Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ----- —------------ ---- Reserved ----------------------
67 I 1.5 169 70141 71 I N I 721 NJ 73 uI I 174 751 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)
09:15 AM 12/03/01
11/03/01
Plant Allen Steam Station
Exit Time/Date
Permit Expiration Date
NCSR 2525
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
/u
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 0 Flow Measurement Operations & Maintenance Records/Reports
Self -Monitoring Program 0 Sludge Handling Disposal 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
/
Wesley N Bell t �v y. �% L� MRO WQ//704-663-1699 Ext.2192/
enc e
Signature of Management Q A Rer `r-- _- Ag Y/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

IRFr_
Permit: NC0004979
nspection Date: 03/01/2012
Permit
Owner -Facility: Plant Allen Steam Station
Inspection Type: Compliance Evaluation
(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?
Is access to the plant site restricted to the general public?
Is the inspector granted access to all areas for inspection?
Comment: The subject permit expires on 5/31/2015. No chlorination is added to the
discharges at Outfalls 001, 003, and 004.
Record Keeping
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 CM
Are DMRs complete: do they include all permit parameters?
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?
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?
Yes No NA NE
Yes No NA NE
■nnn
0 0 0 0
Page # 3

Permit: NC0004979
Inspection Date: 03/01/2012
Record Keeping
Owner -Facility: Plant Allen Steam Station
Inspection Type: Compliance Evaluation
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.
6!5
Yes No NA NE
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 (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?
nn■n
Is sample collected above side streams?
■
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 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?
n
n
■
n
Is sample collected below all treatment units?
■
n
n
n
Page # 4

Permit: NC0004979
Inspection Date: 03/01/2012
Owner - Facility: Plant Allen Steam Station
Inspection Type: Compliance Evaluation
Effluent Sampling
Yes
No
NA
NE
Is proper volume collected?
■
n
D
n
Is the tubing clean?
n
D
■
D
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)?
D
n
■
n
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 D
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge ■ D D D
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
■
o
Is the basin free of bypass lines or structures to the natural environment?
■
n
n
n
Is the basin free of excessive grease?
n
D
■
n
Are all pumps present?
■
n
n
n
Are all pumps operable?
■
n
n
n
Are float controls operable?
■
n
n
D
Are audible and visual alarms operable?
nn■o
# Is basin size/volume adequate?
■
n
n
n
Comment:
Chemical Feed
Yes
No
NA
NE
Is containment adequate?
■
n
n
n
Is storage adequate?
■
n
n
n
Are backup pumps available?
■
n
n
n
Is the site free of excessive leaking?
■
n
n
n
Comment:
Page # 5

Permit: NC0004979
Inspection Date: 03/01/2012
Secondary Clarifier
Owner - Facility: Plant Allen Steam Station
Inspection Type: Compliance Evaluation
Is the clarifier free of black and odorous wastewater?
Is the site free of excessive buildup of solids in center well of circular clarifier?
Are weirs level?
Is the site free of weir blockage?
Is the site free of evidence of short-circuiting?
Is scum removal adequate?
Is the site free of excessive floating sludge?
Is the drive unit operational?
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: The facility was not discharging at the time of the inspecton due to low
influent flows.
Solids Handling Equipment
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?
The facility has an approved sludge management plan?
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
# Is flow meter used for reporting?
Is flow meter calibrated annually?
Yes No NA NE
Yes No NA NE
Yes No NA NE
nn■n
nn■n
Page # 6

rrp-
Permit: NC0004979
Inspection Date: 03/01/2012
Owner -Facility: Plant Allen Steam Station
Inspection Type: Compliance Evaluation
Flow Measurement - Effluent Yes No NA NE
Is the flow meter operational? I] 0 ■ fl
(If units are separated) Does the chart recorder match the flow meter? 0 0 ■ 11
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? ■ Q ❑
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 n ■
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

Fell,es
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.
VO4sou"
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

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue
Governor
Mr. Allen Stowe
Duke Energy Corporation
EC13K / PO Box 1006
Charlotte, NC 28201-1006
Dear Mr. Stowe:
Coleen H. Sullins
Director
January 20, 2011
Dee Freeman
Subject: Cover Letter Clarification
NPDES Permit No.N00004979
Duke Energy Carolinas Allen Steam Station
Gaston County
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 dam 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].
om Belniek, Supervisor
NPDES Complex Permits Unit
Cc: Mooresville Regional Office, Surface Water Protection Section
NPDES Unit Files
Central Files
16VV#R lf44N,a
loatfiu'.��43 At: �¢1��,ay fix �#alef�L hlortn�as�� 11Eit
PhoRe���6j?^i�s003FAX;�fJiN:1�:�iA9;lCi.lStbrtlt3��s`.ty,Yv:at 1•Bi�r`r�d8
lntefit3f�r4�t"l��sYit2�t!!CouSd

A
��
NR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
January 18, 2011
Mr. Allen Stowe
Duke Energy Corporation
EC13K / PO Box 1006
Charlotte, NC 28201-1006
JAM 2. 1 2011
Eli 81S
kho
Dee Freeman
Secretary
i7
Subject: Issuance of NPDES Permit No.N00004979
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:
a Structural integrity inspection of ash pond dam 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. rr.ea-tlly r A�4,er 7 a " lzeq,,j Eut,.z
• 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
Phone: [phone] t FAX: [phone] Customer Service: I.877.623.6748
Internet: http: I h2o.slate,rip us /
An Equal OpoWumty 1 Afllrmativo Achon Employer

PDuke
Energy.
Carolinas
ALLEN STEAM STATION
253 Plant Allen Rd.
Belmont, NC 28012
704 829-2423
704 829-2370 fax DIVISION of WRECEATER QUALITY
January 6, 2012 JAiN 10 2012
Mike Parker MOCRESV:LLE R Gi�NgL 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(a)_duke-energy.com.
S' ly,
� l
cruggs
Sr. EHS Professional
Allen Steam Station

PDuke
Energy
Carolinas
December 15, 2011
REIVED
DIVISION OF WATER QUALITY
DEC 19 2011
" F''`:C'1i ;N
MOORESV#LLE REGIONAL OFFICE
ALLEN STEAM STATION
253 Plant Allen Rd.
Belmont, NC 28012
704 829-2423
704 829-2370 fax
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
William. Ken nedy(a-)_duke-energy.com.
Si
7''��'
D cruggs
Sr. EHS Professional
Allen Steam Station

FFV
AGIA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Land Resources
James D. Simons, PG, PE
Director and State Geologist
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:
Beverly Eaves Perdue, Governor
Dee Freeman, Secretary
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.
"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
Approval to Modify
November 30, 2010
Page 2 of 3
Allen Retired Ash Basin 7DamGASTO
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:
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

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 [phone].
Si erely,
ZIJames 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

County:
GASTON
Sample ID:
AB59463
River Basin
CTB RECEIVED
OFWArF9p
PO Number#
1OW4700
Report To
MROSP DIVISION OF WATER QUALI
Date Received:
06/09/2010
co
tt >_
y
Time Received:
08:20
Collector:
D HOOD ^�{� }
JAN 2-O LV��;,
Y
LabworksLoginlD
SMATHIS
Region:
MRO
.p
Report Generated:
1/5/11
Sample Matrix:
WASTEWATER SWP SECTION
Date Reported:
01/05/2011
Loc. Type:
EFFLUENT
MOORESVILLE REGIONAL OFFICE.
Emergency
Yes/No
Visit1D ' .
'N '� L' ,,
COC Yes/No
s., T j
Loc. Descr.: ALLEN - DUKE POWER
," r f' z
Location ID: NC0004979
Collect Date:
06/08/2010
Collect Time: 14:30
Sample Depth 1
~.;'
Result/
Method
Analysis
CAS #
Analyte Name
P L
Units
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-,1
6/9/10
CGREEN
Total Kjeldahl N as N in liquid
0.2' . a
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
LaclO-107-04-1-c
6/9/10
CGREEN
Phosphorus -total as P in liquid
0.02
0.12
mg/L as P
Lac10-1 15-01-1 EF
6/15/10
CGREEN
MET
7440-22-4
Ag by ICPMS
5
50 P
ug/L
EPA 200.8
7/2/10
ESTAFFORDI
7429-90-5
Al by ICP
50
2600
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-38-2
As by furnace
2
12
ug/L
EPA 200.9
6/23/10
ESTAFFORDI
7429-90-5
B by ICP
50„
160
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-38-3
Ba by ICP
10
220
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-41-7
Be by ICP
5
5.0 U
ug/L
EPA 200.7
6/30110
ESTAFFORDI
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
ESTAFFORDI
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
IOU
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
ESTAFFORDI
7439-89-6
Fe by ICP
50 ° ., , :
5000
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7439-97-6
Hg 245.1
0.2
0.20 U
ug/L
EPA 245.1
6/22/10
ESTAFFORDI
7440-09-7
K by ICP
0.1
3.1
mg/L
EPA 200.7
6130/10
ESTAFFORDI
7439-93-2
Li ICP
25 -
25 U
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7439-95-4
Mg by ICP
0.1
3.5
mg/L
EPA 200.7
6130/10
ESTAFFORDI
Laboratory Section>> 1623 Mail Service Center, Raleigh, NC 27699-1623 [phone]
For a detailed description of the qualifier codes refer to htrn:acwR,,.ncdenr.ornAveblwalah/stafinfo.lecli ssisueData Qualifier Codes <hnp://Donal. ncdenr.omlwebWglabistaffinfoltechassisl>
,,, -'Page 1 of 2

WC fDIVQ
Laboratory section W§sufts
Location ID:
NC0004979
Sample ID: AB59463
Collect Date:
06/08/2010
Collect Time::
14:30
MET
CAS #
Analyte Name
Pam(. L_
Result/
Units
Method
Analysis
Validated by
„
Qualifier
Reference
Date
7439-96-5
Mn by ICP
10 `'" ..
350
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7439-98-7
Mo by ICPMS
10'
200 P
ug/L
EPA 200.8
6/21/10
ESTAFFORDI
7440-23-5
Na by ICP
0.1
6.4
mg/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-02-0
Ni by ICP
10
12
ug/L
EPA 200.7
7/14/10
ESTAFFORDI
7439-92-1
Pb by furnace
10
IOU
ug/L
EPA 200.9
6/24/10
ESTAFFORDI
7440-36-0
Sb by ICPMS
10
200 P
ug/L
EPA 200.8
6/21/10
ESTAFFORDI
7782-49-2
Se by furnace
5
7.8
ug/L
EPA 200.9
7/2/10
ESTAFFORDI
7440-31-5
Sn by ICPMS
10 i..,,
200 P
ug/L
EPA 200.8
6/21/10
ESTAFFORDI
7440-28-0
Thallium (TI) ICPMS
10,
200 P
ug/L
EPA 200.8
6/21/10
ESTAFFORDI
7440-32-6
Ti (Titanium) by ICP
10
180
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-62-2
V by ICP
25
42
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-66-6
Zn by ICPMS
10
34
ug/L
EPA 200.8
7/2/10
ESTAFFORDI
+ C
'A
,
a►...
-a:
r
Laboratory Section>> 1623 Mail Service Center, Raleigh, NC 27699-1623 [phone]
For a detailed description of the qualifier codes refer to http�rtportat ncdenroro/web/woilaWstafiinloiechassr(sputa Qualifier codes htlo'J/Donal nmenrofgmebhwAAblstatPolfo/teoassSh
1. Page 2of2

DIVISION OF WATER QUALITY
FT.
�r
'
Chemistry Laboratory Report / Water Quality
❑ SAMPLE TYPE
. ar
Dale Received:
r � � r p
ur
COUNTY t 1f16�/
FRJOR[TTime
❑AMBIENT QA
❑STREAM
t �l
I EFFLUENT
Reccived :
Received II Y
p�
p29
R1V! R $ASIN :
REPORTTO V1
Regional Office ❑ COMPLIANCE a CHAIN OF CUSTODY
❑LAKE
❑]INFLUENT
} ❑ EMERGENCY VISM ID
ESTUARY
Data Released
Other
Date Reported
COLLE(:'I'OR(S) i
1 �
I
`\ d��
Estimated BOD Range:
Station Location:
V (i
Seed:
Chlorinated: Remarks:
'lgtiy/t H ,o tiu Co�/��/�
Uate egin (y !min/ d)
Date Nand (yin/dd)
Time F3egin
'1'ime��d
Depth - DM, DB, llBM
Va ype- A. II, L
Compn itr•'I', S, H
Say le'I'Ypa
SOD 310 mg/L
COD High 340 mWL
COD Low 335 ig/L
Coliform: MF Fecal 31616 /100ad
Coliform: MF Total 31504 /100ml
Coliform: tube F'ecal'31615 /100ml
Cohform• Feud Strep 31673 /100ml
Residue: Total 500 mg/L
Volatile 505 mg/L
Fixed 510 ml/L
Residue: Suspended 530 mp/L
Volatile 535 mg(L
Fixed 540 m8/L
PH 403 units
Acidity to pH 4.5 436 m&L
Acidity to pH 8.3 435 mg/L
Alkalinity to pH 8.3 415 mp/L
Alkalinity to pH 4.5 410 mg/L
"IOC 680 mWL
Turbidity 76 N rU
Coliform Total Tube /100 ml
Chloride 940 mg/L
Chlorophyll a EPA 445.0 modified option ut/L
Color: True 80 c.U•
Color (pH) 83 PH` c U.
Color: pH 7.6 82 c u.
Cyanide 720 mg/L
Fluoride 951 mg/L
Formaldehyde 71880 me,/L
Grease acid Oils 556 mg/L
14ardness Total900 mg1L
Specific Cond. 95 mnhos/cm
MBAS 39260 mg/L
Phenols 32730 uglL
Sulfate 945 mg/L
Sulfide 745 mg/L
Boron
Tannin & Liyln ug/L
lfexavaleni Chromium uWL
Bicarbonate mg/L
Carbonate ml/L
Total Dissolved Solids ml/L
11 NH3 as N 610 nVL Li-Lithiui 1 132 ug/L
TKN an N 625 n1wl. Mg- Muytesiunt 927 mg/L
NO2 plus NO3 as N 630 mull.Mn•Manganese 1055 ug/L
P: Total as P 665 ml/L Nu -Sodium 929 ml/L
PO4 as P 70507 mg/L Arsenic'1'otnl U1f12 uk/L
P: Dissolved as P 666 mg/l. Se- Selenium 1147 ul/l.
K-Potassium mglL 1.16- hletcury 71900 ul/I.
Cd- Cadmium 1027 ug/L Ba-Bariwn ug/L
Cr-Chromium.Total 1034 ug/L Orymochlorine Pesticides
Cu-Copper 1042 ul/L Organophosphorus Pesticides
Ni-Nickel 1067 ug/L Oryut0nitr0gen Pesticides
Pb- Lead 1051 ug/l, Acid Herhicides
Zn- Zinc 1092 ug/L
v-Va,tadium u+}/L, Base/Neutral &,AcidExtruutubleOrymics
Ag- Silver 1077 u8/I. 'rPlI Diesel Range
Al- Aluminum 1105 ug/L
Be. Beryllium 1012 ug/L Purgeable Or rg nies (VOA hultle reti'd)
Ca- Calcium 916 mg/L 'I'PH Gasoline Range
o- Cobalt 1037 ul/l. 'rPimi-Ex Gasoline Range
Fe- Iron 1045 ut/L Phytoplaukton
o-Molybdenum ug/L
b-Antimony ul/L
Sn-Tin ul/L
TI-Thallium ug/L
Ti-Titanium ug/L
Hg-1631 np/L Temperature on arrival (aC)

k
Beverly Eaves Perdue
Governor
FILE
NCDENR i,,/
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen H. Sullins
Director
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:
Dee Freeman
Secretary
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/1),
Manganese (200 ug/1), and Thallium (0.24 ug/1).
2. The Selenium results exceeded the weekly limit in the previous permit (21ug/1) as well as
the Water Quality Standard for Class B waters (5 ug/1).
3. The following results exceeded the Water Quality Action Levels for Class B streams:
Copper (7 ug/1), Silver (0.06 ug/1), Chloride (230 mg/1).
4. The following exceeded Water Quality Standards: Aluminum (87 ug/1)
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
(45.30C/113.50F) 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.
Hood at [phone].
Sincerely,
^ Ak
Robert B. Krebs
Regional Supervisor
Surface Water Protection
Enclosure:
DH

Outfa11002
Dail
U 1
U 1
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 CenterAve., Suite 301 Mooresville, NC 28115
Phone: [phone] Fax: [phone] Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity1 Affirmative Action Employer - 50% Recycled/10% Post Consumer paper
One
North Carolina
Naturally

United States Environmental Protection Agency
Form Approved.
EPA Washington, D.C. 20460
OMB No. 2040-0057
Water Compliance Inspection Report
Approval expires8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 NNC000499 10/06/0I 20II 15I I 1I 117 18SI 19I
Remarks
21111111111111111111111111111111111111111111111116
Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA------------Reserved----- —
67 I 5.0 169 701 41 711 I 72 I N I 73I -+--� I' 74 751 I I I I I Li 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)
09:45 AM 10/06/08
09/08/01
Plant Allen Steam Station
Exit Time/Date
Permit Expiration Date
NCSR 2525
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
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)
Permit Flow Measurement Operations & Maintenance Records/Reports
Self -Monitoring Program Sludge Handling Disposal 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
Wesley N Be MRO WQ//704-663-1699 Ext.2192/
n
Donna Ho MRO WQ//704-663-1699 Ext.2193/ ! a
Si nature of Management Q A Re w Agency/Office/Phone and Fax Numbers Date
9
Marcia Allocco MRO WQ//704-663-1699 Ext.2204/
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page # 1

NPDES yr/mo/day Inspection Type
3I NC0004979 I11 12, 10/06/08 I17 181CI
(cont.) 1
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
Inspection Date: 06/08/2010
Permit
Owner - Facility: Plant Allen Steam Station
Inspection Type: Compliance Sampling
(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: 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
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge ■ ❑ n n
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?
00
■ 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
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
■ 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? I® ❑ n n
Facility has copy of previous year's Annual Report on file for review? n n ® n
Comment: DMRs for March 2009-February 2010 were reviewed for the' inppection.
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?
U
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
®
[l
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees?
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's
■
n
n
n
Are weeds controlled around the edge of the lagoon?
■
n
n
n
■nnn
Are dikes free of seepage?
®nnn
Are dikes free of erosion?
Are dikes free of burrowing animals?
■
n
n
n
# Has the sludge blanket in the lagoon (s) been measured periodically in multiple locations?
n
n
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
Comment:
Flow Measurement - Effluent
# Is flow meter used for reporting?
Is flow meter calibrated annually?
Is the flow meter operational?
(If units are separated) Does the chart recorder match the flow meter?
Comment: Effluent flow is measured by pump logs and staff gauge.
Effluent Sampling
Is composite sampling flow proportional?
Is sample collected below all treatment units?
Is proper volume collected?
Is the tubing clean?
# 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 facility was sampled on the day of the inspection. Please see the
attached sample result sheets for all sample results.
Effluent Pipe
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?
Comment:
Yes No NA NE
■nnn
Yes No NA NE
■nnn
■nnn
nn■n
Page # 5

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP
Sample Date(s): 06/08/2010
Grab: X Composite:
NPDES Permit No. NC0004979
Sample Location: Outfall 002
County: Gaston
BOD5, m
< 2.0
- lolybdenumrug/1_
200*_
COD: Low, mg/I
<20
Na-Sodium, mg/l
6.7
Chloride, mg/I
240
Ni-Nickel, u /l
12
Fluoride, mg/1
<4.0*
Pb-Lead, u
<10
Sulfate, mg/I
85
Sb-Antimony, ug/l
200*
TDS-Total Dissolved Solids, m l
768
Se -Selenium, ug/1
25.0
NH3-N, mg/1
0.34
Sn-Tin, ug/I
200*
TKN, mg/I
0.50
TI-Thallium, ug/1
200*
NO + NO3, Mg/1
0.64
Ti-Titanium, ug/1
<10
P: Total, mg/I
0.12
V-Vanadium, ug/I
<25
A -Silver, ug/1
50*
Zn-Zinc, ug/1
31
Al -Aluminum, ug/I
190
TOC, mg/I
<2.0
As -Arsenic- ug/I
2.5
TSS, mg/I
<12.0
B-Boron, ug/I
5500
PH, su
6.4
Ba-Barium, ug/I
110
Temperature, °C
28.5
Be -Beryllium, ug/I
<5.0
Ca -Calcium, mg/I
130
Cd-Cadmium, ug/I
<2.0
Co -Cobalt, ug/1
<50
Cr-Chromium: Total, u /l
<10
Cu-Copper, ug/I
20*
Fe -Iron, ug/I
1510
H -Mercu , ug/I
<0.2
K-Potassium, mg/I
3.1
Li -Lithium, ug/I
<25
Mg -Magnesium, mg/I
29
Mn-Manganese, ug/I
300
* denotes an elevated PQL due to matrix spike interference and/or sample dilution

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP
Sample Date(s): 06/08/2010
Grab: X
Composite:
NPDES Permit No.
NC0004979
Sample Location: Outfall 002A
County: Gaston
BOD5, rT — -
Mo-MoLybdeau ugh _
200*
COD: Low, mg/1
<20
Na-Sodium, mg/1
6.4
Chloride, m I
9.6
Ni-Nickel, ug/I
12
Fluoride, mg/1
<0.4*
Pb-Lead, ug/I
<10
Sulfate, mg/1
37
Sb-Antimony, ug/I
200*
TDS-Total Dissolved Solids, m I
82
Se -Selenium, ug/I
7.8
NH3-N, m I
0.45
Sn-Tin, ug/I
200*
TKN, m I
0.82
Tl-Thallium, ug/I
200*
NO2 + NO3, m /l
0.28
Ti-Titanium, ug/1
180
P: Total, m I
0.12
V-Vanadium, ug/I
42
A -Silver, ug/I
50*
Zn-Zinc, ug/I
34
Al -Aluminum, ug/I
2600
TOC, mg/1
2.3
As -Arsenic, u 1
12
Conductivity, umhos/cm
211
B-Boron, u I
160
PH, su
4.8
Ba-Barium, u 1
220
Temperature, °C
45.3
Be -Beryllium, u 1
<5.0
Dissolved Oxygen, mg/l
2.8
Ca -Calcium, ug/I
I 1
Cd-Cadmium, ug/I
<2.0
Co -Cobalt, ug/I
<50
Cr-Chromium: Total, ug/I
<10
Cu-Copper, ug/I
35
Fe -Iron, u 1
5000
H -Mercu , ug/I
<0.2
K-Potassium, m I
3.1
Li -Lithium, ug/I
<25
ivi -Ma esium, m I
3.5
Mn-Manganese, ug/I
350
* denotes an elevated PQL due to matrix spike interference and/or sample dilution

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP
Sample Date(s): 06/08/2010
Grab: X
Composite:
NPDES Permit No.
NC0004979
Sample Location: FGD Influent
County: Gaston
BODS, mg/1
2.9
Mo-MalyWnutn, u0
1000*
COD: Low, m I
83
Na-Sodium, mg/1
34
Chloride, mg/1
5300
Ni-Nickel, u
250
Fluoride, mg/1
<100*
Pb-Lead, ug/I
150
Sulfate, m I
1000
Sb-Antimony, ug/l
1000*
TDS-Total Dissolved Solids, mgJI
23.500
Se -Selenium, ug/l
2300
NH3-N, mg/I
14
Sn-Tin, ug/I
1000*
TKN, m
18
Tl-Thallium, ug/I
1000*
NO, + NO,, Mg/1
26
Ti-Titanium, ug/l
2500
P: Total, mg/1
4.3
V-Vanadium, ug/I
200
A -Silver, ug/I
100*
Zn-Zinc, ug/I
320
Ai -Aluminum, ug/I
72,000
As -Arsenic, u
210
B-Boron, ug/I
100,000
Ba-Barium, u
1,400
Be -Beryllium, ug/I
11
Ca -Calcium, u
3,600
Cd-Cadmium, u
4.7
Co -Cobalt, ug/I
100
Cr-Chromium: Total, ug/I
180
Cu-Copper, u I
230
Fe -Iron, u
80,000
H -Mercu , ug/I
0.55
K-Potassium, m
36
Tempera ture, °C

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Allen Steam Station WWTP
Sample Date(s): 06/08/2010
Grab: X
Composite:
NPDES Permit No.
NC0004979
Sample Location: Clarifier Effluent/Bioreactor Influent
County: Gaston
BODS, m 1 -- — - -
< 2.0
Mo-Molyhdenum ngll __ _
200*
COD: Low, mg/1
100
Na-Sodium, mg/I
33
Chloride, mg/1
5600
Ni-Nickel, ug/1
<10
Fluoride, mg/1
<100*
Pb-Lead, ug/1
<10
Sulfate, mg/1
1100
Sb-Antimony, ug/I
200*
TDS-Total Dissolved Solids, mg/1
23,400
Se -Selenium, ug/1
140
NH3-N, mg/1
17
Sn-Tin, ug/1
200*
TKN, mg/1
18
TI-Thallium, ug/I
200*
NO2 + NO3, m /I
28
Ti-Titanium, ug/1
100*
P: Total, me/1
0.03
V-anadium, ug/1
<25
A -Silver, ug/1
50*
Zn-Zinc, ug/1
<10
Al -Aluminum, ug/1
<50
As -Antimony, ug/1
2.8
B-Boron, u /I
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, u /1
<50
Cr-Chromium: Total, ug/1
20
Cu-Copper, ug/1
20*
Fe -Iron, u I
72
H -Mercu , ug/1
<0.2
K-Potassium, mg/1
15
Li -Lithium, ug/1
84
Mg -Magnesium, mg/1
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
Sample Date(s): 06/08/2010
Grab: X
Composite:
NPDES Permit No.
NC0004979
Sample Location: FGD Effluent
County: Gaston
BOD5, m /I
< 2.0
Mo-Molybdenum,-ug/1- -
200*
COD: Low, m /I
23
Na-Sodium, mg!l
24
Chloride, m /l
3500
Ni-Nickel, ug/I
<10
Fluoride, m I
<100*
Pb-Lead, u /I
<10
Sulfate, mg/1
740
Sb-Antimony, ug/I
200*
TDS-Total Dissolved Solids, m I
13,500
Se -Selenium, ug/1
50*
NH,-N, mg/I
16
Sn-Tin, ug/I
200*
TKN, mg/1
16
Tl-thallium, ug/I
200*
NO2 + NO3, Mg/1
0.10
Ti-Titanium, ug/l
100*
P: Total, mg/1
0.17
V-vanadium, ug/1
<25
Ag-Silver, u /1
50*
Zn-Zinc, ug/l
<10
A] -Aluminum, ug/I
170
As -Arsenic, u I
10*
B-Boron, ug/l
76,000
Ba-Barium, u /1
240
Be -Beryllium, u /I
<5.0
Ca -Calcium, u /l
1,600
Cd-Cadmium, u /I
<2.0
Co -Cobalt, u /1
<50
Cr-Chromium: Total, u I
<10
Cu-Copper, u /1
20*
Fe -Iron, u /l
370
H -Mercu , u /I
<0.2
K-Potassium, m /I
16
Li -Lithium, u /I
58
Mg -Magnesium, mg/1
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
Sample Date(s): 06/08/2010
Grab: Y
Composite:
NPDES Permit No.
NC0004979
Sample Location: Slope Drain Effluent
County: Gaston
BOD5, mg/1 -- _ — -
< 2 0
Mo-Molybdenum�ug/l
200*
CC '): Low, m /l
<20
Na-Sodium, mg/I
14
Chloride, mg/1
34
Ni-Nickel, ug/l
12
Fluoride, m /l
<0.4
Pb-Lead, ug/l
<10
Sulfate, mg/1
22
Sb-Antimony, ug/l
200*
TDS-Total Dissolved Solids, m /l
116
Se -Selenium, ug/l
<5.0
NH3-N, mg/l
<0 02
Sn-Tin, ug/l
200*
TKN, m /l
<0 2
TI-Thallium, ug/l
200*
NO, + NO3, m 1
0.67
Ti-Titanium, ug/l
<10
P: Total, m /l
<0.02
V-Vanadium, ug/l
<25
A -Silver, ug/l
50*
Zn-Zinc, ug/l
20
AI -Aluminum, ug/l
110
TOC, mg/l
<2.0
As Arsenic, ug/l
<2.0
B-Boron, ug/l
190
Ba-Barium, ug/l
160
Be -Beryllium, ug/l
<5.0
Ca -Calcium, ug/l
5.4
Cd-Cadmium, ug/l
<2.0
Co -Cobalt, ug/l
<50
Cr-Chromium: Total, ug/l
<10
Cu-Copper, u /1
20*
Fe -iron, ug/l
190
H -Mercu , ug/l
<0.2
K-Potassium, mg/1
2.3
Li -Lithium, u /1
<25
Mg -Magnesium, mg/1
8.9
Mn-Manganese, ug/l
200
* denotes an elevated PQL due to matrix spike interference and/or sample dilution

County:
GASTON
Sample ID:
AB59462
River Basin
CTB �QF WATFQQ
PO Number#
1OW4699
Report To
MROSP �O
v'
RECEIVED
Date Received:
Time Received:
06/0912010
08:20
Collector:
D HOOD
OF WATER QUALITY" -;A
�
Labworks LoginlD
SMATHIS
Region:
DIVISION
MRO
".�,
Report Generated:
1/5/11
Sample Matrix:
WASTEWATER
2 0 2011.
Date Reported:
Loc. Type:
EFFLUENT JAN
01/05/2011
Emergency Yes/No SWP SEC ION VisitlD
COC Yes/No
M0 SVILLE REGIONAL OFFICE
*+,
Loc. Descr.: ALLEN - DUKE POWER
Location ID:
NC0004979
Collect Date: 06108I2010
CollecYTime r A 12:20
ample,Oepth.- 1
CAS #
LAB
Analyte Name
Sample temperature at receipt by lab `'
PQL
- Result/
Qualifier
0.6
Units
°C
Method
Reference
Analysis
Date
6/9/10
Validated by
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:.?_ '`
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
7/2110
ESTAFFORDI
7429-90-5
Al by ICP
50
190
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-38-2
As by furnace
2 '''-
2.5
ug/L
EPA 200.9
6/23/10
ESTAFFORDI
7429-90-5
B by ICP
50'
5500
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-38-3
Ba by ICP
10
110
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-41-7
Be by ICP
5
5.0 U
ug/L
EPA 2007.
6/30/10
ESTAFFORDI
7440-70-2
Ca by ICP
0.1
130
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
ESTAFFORDI
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,
IOU
ug/L
EPA 200.7
7/14/10
ESTAFFORDI
7440-50-8
Cu by ICPMS
2
20 P
ug/L
EPA 200.8
7/2/10
ESTAFFORDI
7439-89-6
Fe by ICP
50
150
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7439-97-6
Hg 245.1
0.2
0.20 U
ug/L
EPA 245.1
6/22110
ESTAFFORD1
7440-09-7
K by ICP
0.1
" 3.1
mg/L
EPA 200.7
6/30110
ESTAFFORDI
Laboratory Section 1623 Mail Service Center, Raleigh, NC 27699-1623 [phone]
For a detailed description of the qualifier codes refer to htowportal nodenromAveb/wn9ab/stair 4otlerbassisl#Data Oualifer Codes <httuvl/podal nmenroro Webfwo/labistatfinfoftechassish
s "P. „ „' I. Page 1 of.2

NC(D$VQ Ga6oratorySection [fsufts
Location ID:
NC0004979
Sample ID:
AB69462
Collect Date:
06/08/2010
Collect Time::
12:20 I '
MET
CAS #
7439-93-2
Analyte Name
Li ICP
PQL
25.7
Result/
,. Qualifier
25 U
Units
ug/L
Method
Reference
EPA 200.7
Analysis
Date
6/30/10
Validated by
ESTAFFORDI
7439-95-4
Mg by ICP
0:1.
29
mg/L
EPA 200.7
6/30/10
ESTAFFORDI
7439-96-5
Mn by ICP
10
300
Dg/L
EPA 200.7
6/30/10
ESTAFFORDI
7439-98-7
Mo by ICPMS
10
200 P
ug/L
EPA 200.8
6/21/10
ESTAFFORDI
7440-23-5
Na by ICP
0.1
6.7
mg/L
EPA 200.7
6/30110
ESTAFFORDI
7440-02-0
Ni by ICP
10
12
ug/L
EPA 200.7
7/14/10
ESTAFFORDI
7439-92-1
Pb by furnace
10
IOU
ug/L
EPA 200.9
6/24/10
ESTAFFORDI
7440-36-0 .
Sb by ICPMS
10,
200 P
ug/L
EPA 200.8
6/21/10
ESTAFFORDI
7782-49-2
Se by furnace
5
25 P
ug/L
EPA 200.9
7/2/10
ESTAFFORDI
7440-31-5
Sn by ICPMS
10
200 P
ug/L
EPA 200.8
6/21/10
ESTAFFORDI
7440-28-0
Thallium (TI) ICPMS
10
200 P
ug/L
EPA 200.8
6/21110
ESTAFFORDI
7440-32-6
Ti (Titanium) by ICP
10
IOU
ug/L
EPA 200.7
6/30/10
ESTAFFORDI
7440-62-2
V by ICP
25
25 U
ug/L
EPA 200.7
6/30110
ESTAFFORDI
7440-66-6
Zn by ICPMS
10
31
ug/L
EPA 200.8
7/2/10
ESTAFFORDI
Sample Comments
&O sample was preserved with NaOH instead of H2SO4. t
M
}v f
I
Laboratory Section>> 1623 Mail Service Center, Raleigh, NC 27699-1623 [phone]
For a detailed description of the qualifier codes refer to hdo:t%nodal.nodenr. omAvebAycilabistaHinfoaechassislpData Qualifier Codes<hltoJ/fmrtal.nodenr.omlweblwotlaWstaffinfoAechassish
t Page 2 of 2

COUNTY
RIVERBASIN: f"y�.- n�ba
� ^ l
REPORT'TO ��1/ 114 Regional Office
Other :
COLLECTOR(S) /
Estimated BOD Range: '- �0 it'l/�r-'
Seed: Chlorinated:
D&
DIVISION Ole WATER QUALITY
Chemistry Laboratory Report /Water Quality
low 4(6 1
SAMPLETYPE
PRIORITY
AMBIENT QA STREAM � EFFLUENT
COMPLIANCE CHAIN OF CUSTODY I LAKE INFLUENT
EMERGENCY r-visn'II'1D I ESTUARY
Station Location:
Remarks:
LatTlvunµna
ate Received : �' 9 ,: J
Time Received.
Received By
Data Released :
Date Repoded :
Dnte Be n / n/J
(y7 )
Dale En J /Inm/dJ
(YY )
"Time Be go
g
'^7
•G
'Dime End
Depth - DNI, DB, DIlM
\9Jue Type • A, H, L
/-A
f
C'umpusilc= f, S, li
/,l%
4-v
Saint 'Type
S ati n q/ .or tiolt Cn,Jc
Li -Lithium 1132 ug/L
NH3 as N 610 ml/L
Chloride 940 mg/L
BOD 310 mg/L
,jvig- Magn.siu n 927 ml/I-
MN an N 625 mg/L
13OHilt 340 mg/L
vin-Manganese 1055 udL
NO2 plus NO3 as N 630 mg/L
Chlorophyll a EPA 445 0 modified option ug/L
COD Low 335 mgrL
Sod929
Na-
P' rotal as P 665 mg/L
Colifurm. MF Fecal 31616 /100ml
"ell,
Ar-S.I,natal 1(102 ug/l.
Ars mc. r-t
PO4 as P 70507 mg/L
Color True 80 c u.
/100mI
Cohfornv MF Total 31504
Co)ifurm: tube Fecal 31615 /100ml
Color: (pH) 83 pH• c_u.
P. Dissolved as P (566 mglL
Selenium 1147 ug/1.
0
Ilg- hlercury 71900 up/l.
IIg
K-Potassmm mg/L
Color: pH 7.6 82 - u.
C'olifor'm�, Fecal Strep 31673 /100ml
Ba-Bnrium ui;'L
Cd- Cadmium 1027 ug/L
Cyanide 720 mg/L
Residue: Total 500 mW
Organochlortne Pesticides
Fluoride 951 me/L
Cr-Chromium:Total 1034 u&1L
Volatile 505 m�L
Cu- Copper 1042 uWL
Organophosphorus Pesticides
Fomtaldehvde 71980 mg/L
Fixed 510 mg/L
Pesticides
N!-Nickel 1067
Grease mid Oils 556 mg/L
Residue: Suspended 530 mg/L
Hardness, Total 900 mg/L
,g/L
Pb- Lead 1051 ul/L
AcidorpIlnitrogen
Acid Herbicides
Volatile 535 n1yL
Fixed 540 mg/L
Specific Cord. 95 urn]m/cm
Zn- Zinc 1092 ��g/1•
38260 mg/L
V-Vanadium ug/L
Base/Neutr l&Acid Extractable Orgmtes
pH 403 units
MBAS
Phenols 32730 ug/L
Sulfate 945 mgrL
Ag- Silver 1077 ug/L
Al- Aluminum 1105 u&/1•
TPH Diesel Range
Acidity to pH 4.5 436 mIJL
8.3 435 mg/L
Acidity to pH
mg/L
Alkalinity to pH 8.3 415 b/
Sulfide 745 mg/L
Be- Beryllium 012 ug/l.
Purgeable Urynucs (VOA bottle mid)
Boron
Ca- Calcium 916 mg/L
TYIi Gasoline Range
Alkalinity to pl-14.5 410 mafL
I'VWBTEX Gasoline Range
Co- Cubalt 1037 ug/L
TOC 680 maL
Tannin & Lil;nin ug/L
ug/L
Fe- Iron 1045 ug/L
Phytuplanktun
'Turbidity 76 NTU
Hexavalent Chromium
Bicarbonate mg/L
Mo-Molybdenum ug/L
Colifonn Total Tube /100 nil
Carbonate mg/L
Sb-Antimony ug/l.
Total Dissolved Solids mg/L
Sn-Tin ug/L
'll/f'hallium ug/L
T't-Titanium ug/I.
Temperature on arrival ('C).
Hg-1631 ngJl.
OC 01-�-)

a
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
June 24, 2010
Ron Lewis
Water Management, Duke Energy
EC13K
PO Box 1006
Charlotte, NC 28201-1006
Dee Freeman
Secretary
JUN 2 8 2010
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.fleek(cDncdenr.4ov or at 919-743-
8469.
cc
Jeff Poupart, Surface Water Protection Section
Sergei Chernikov, 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
Location: 4401 Reedy Creek Road, Raleigh, North Carolina 27607
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: http://h2o.enr.state.nc.us/esb/
Sincerely,
Jay S uber
Chief, Environmental Sciences Section
Nne
orthCarolina
,,Naturally
An Equal Opportunity 1 Affirmative Action Employer

di
Beverly Eaves Perdue
Governor
����A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen H. Sullins
Director
11 .f___ 1 1 1nnr1
iviay I I, Z-vvY
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:
FJ�
Dee Freeman
Secretary
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].
Enclosure
cc: Central Files
JL
Sincerely,
for Robert B. Krebs
Surface Water Protection
Regional Supervisor
Gaston County Health Department
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
NorthCarolina
Natural&
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 NI 2 15I 31 NC0004979 Ill 121 09/05/05 117 18I CI 191SI 20[ I
l=
Remarks
21IIII IIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIII°
Inspection Work Days Facility Self -Monitoring Evaluation Rating 61 CIA --------------------------- Reserved ----------------------
67 I 3.0 169 701 41 711 DI 72I N I 73 LLJ 74 751 I I I I III 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
Exit Time/Date
Permit Expiration Date
NCSR 2525
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)
Permit N Flow Measurement Operations & Maintenance 0 Records/Reports
Self -Monitoring Program Facility Site Review -ffluent/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 LesleyMRO WQ//704-663-1699 Ext.2198/ 5//1/ D
Si nature of Management Q A eve er Agency/Office/Phone and Fax Numbers
ee„--ia nllnrrn MRO WQ//704-663-1699 Ext.2204/—J�11
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page # 1

NPIDES
yr/mo/day
Inspection Type
Section D: Summary
of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
nw
Page# 2

Permit: NC0004979 Owner - Facility: Plant Allen Steam Station
Inspection Date: 05/05/2009 Inspection Type: Compliance Evaluation
Operations & Maintenance
Is the plant generally clean with acceptable housekeeping?
hzi
V-- - \I• \Ic
■ ❑ ❑ Q
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge 0 fl ■ ❑
h irina anri nthar that are nonlicable?
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?
■
❑
Is the facility as described in the permit?
■
n
n
n
# Are there any special conditions for the permit?
■
❑
n
n
Is access to the plant site restricted to the general public?
■
p
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?
■
Cl
n
n
Is all required information readily available, complete and current?
■
Cl
n
n
Are all records maintained for 3 years (lab. reg. required 5 years)?
■
n
n
p
Are analytical results consistent with data reported on DMRs?
■
❑
❑
Q
Is the chain -of -custody complete?
■
❑
0
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 Q ■ ❑
(If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified operator on each shift? ■ ❑ n ❑
Page # 3

Permit: NC0004979
Inspection Date: 05/05/2009
Owner -Facility: Plant Allen Steam Station
Inspection Type: Compliance Evaluation
Record Keeping
Yes
No
NA
NE
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
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
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
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?
n
n
■
n
Is composite sampling flow proportional?
❑
❑
■
n
Is sample collected below all treatment units?
■
n
n
n
Is flow meter calibrated annually?
n
n
■
n
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?
O
❑
■
n
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)?
■
Q
❑
n
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)?
■
Q
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?
■
o
o
n
Are all other parameters(excluding field parameters) performed by a certified lab?
■
o
n
n
Page # 4

Permit: NC0004979
Inspection Date: 05/05/2009
Owner - Facility: Plant Allen Steam Station
Inspection Type: Compliance Evaluation
Yes No NA NE
Laboratory
# 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)? ■ Q ❑ Q
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? ❑ Q ■ I
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? Q ❑ ■ ❑
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)? p ❑ ■
Comment:
Page # 5

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
January 13, 2010
Allen Stowe
Water Management, Duke Energy
EC13K
PO Box 1006
Charlotte, NC 28201-1006
JAN 1 9 2010
Dee Freeman
Secretary
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
Location: 4401 Reedy Creek Road, Raleigh. North Carolina 27607
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: http://h2o.enr.state.nc.us/esb/
Nor thCarolina
Aaturallrf
An Equal Opportunity 1 Affirmative Action Employer

Allen Stowe
January 136, 2010
Page 2
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,
/etCaldwell for Jay Sauber
Acting Chief, Environmental Sciences Section
cc: Eric Fleek, Environmental Scien s cfon
Plr I�fl1^°F10 al Office
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, III., 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.

Beverly Eaves Perdue
Governor
Mr. Ronald E. Lewis
Duke Energy Company
Mail Code: EC 13K
526 S. Church Street
Charlotte, NC 28202
Dear Mr. Lewis:
AMA'
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen H. Sullins
Director
March 10, 2010
D e'Freeman
Secretary
1 5 2010
Subject: Authorization to Operate
Cooling Water Intake Structure
NPDES Pen,
Duke Power/Allen Steam Station
Gaston County
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 NorthCarohna
Internet: www.ncwaterquality.org NatutrallY
An Equal Opportunity \ 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.
Sinc rely,
1
m Belnick
Supervisor, Western NPDES Program
Cc: NPDES Permit File
Central Files
1617 Mail Service Center, Ralegh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh; North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service:1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity '.Affirmative Action Employer
Nne
orthCarohna
;Vatura!!rf

PF .-av 41
711
INSPECTION REPORT ROUTING SHEET
To be attached to all inspection reports in-house only.
_l
Laboratory Cert. #: 5134
Laboratory Name: Duke Power Co. Allen Steam Station
Inspection Type: Field Maintenance
Inspector Name(s): Chet Whiting JAN 2 8 2010
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. CID
Unit Supervisor: Gary Francies
Date Received: 1/25/2010
Date Forwarded to Alberta: 1/25/2010
Date Mailed:

!at,11 ••�I
w (r
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue
Governor
5134
Mr. Rodney Wike
Duke Power Co. Allen Steam Station
13339 Hager's Ferry Road
Huntersville, NC 28078-7929
Coleen H. Sullins
Director
January 26, 2010
SUBJECT: North Carolina Wastewater/Groundwater Laboratory Certification (NC WW/GW LC)
Maintenance Inspection
Dear Mr. Wike:
Dee Freeman
Secretary
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
certification requirement, 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 me at 828-296-4677.
Sincerely,
C�
Gary Francies
Unit Supervisor
Laboratory Section
cc: Mwesvttle Regio".Offiow
Chet Whiting
DENR DWQ Laboratory Section NC Wastewater/Groundwater Laboratory Certification Branch
1623 Mail Service Center, Raleigh, North Carolina 27699-1623
Location: 4405 Reedy Creek Road. Raleigh, North Carolina 27607-6445
Phone: [phone] FAX: [phone]
Internet www.dwglab.org
An Equal Opportunity lAtlimrativeAction Employer Customer Service:1-877-623-6748 www.ncwaterquality.org
One
NorthCarofina
Naturally

LABORATORY NAME:
NPDES PERMIT #:
ADDRESS:
CERTIFICATE #:
DATE OF INSPECTION:
TYPE OF INSPECTION:
AUDITOR(S):
LOCAL PERSON(S) CONTACTED:
1. INTRODUCTION:
On-Site Inspection Report
Duke Power Co. Allen Steam Station
N C0004979
Duke Power Company LLC
13339 Hager's Ferry Road
Huntersville, NC 28078-7929
5134
November 30, 2009
Field Maintenance
Chet Whiting
Rodney Wike
This laboratory was inspected to verify its compliance with the requirements of 15A NCAC 2H .0800 for
the analysis of environmental samples.
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.

..
. 'Page 2
Lab #5134 Duke Power Co. Allen Steam Station
pH — Standard Methods, 18`h Edition, 4500 H+ B
s
Comment: The laboratory is performing Automatic Temperature Compensator (ATC) cl
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

�Aafflj'P'A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. SullinsR F
Db Fr man
Governor Director S' retary
May 6, 2009
Mr. Steven Immel, General Manager II
Duke Energy Carolinas, LLC- Allen Steam Station
253 Plant Allen Road.
Belmont, North Carolina 28012
Dear Mr. Immel:
M AY - 2009
DWQ-S;:: race Wafer f'rd'colion
Subject: Draft NPDES Permit
Permit No. NC0004979
Allen Steam Station
Gaston County
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, LLC 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
An Equal Opportunity\ Affirmative Action Employer ahmally

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] [e-mail].
oe/acq
Yyn M. Gll
rowgra,mNPD,S Western
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
Ito 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 XXXXXXXXXXXXXXXX.
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:
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 (Outfa11001)
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
onthly
Daily
Measurement
Sample Type
Sample Location
Average
Maximum
Frequency
Flow
F3v8.9
Daily
Pump Logs
Effluent
Temperature
(June 1 — September 30)1
°C
(102 °F)
Daily
Grab or
Instantaneous
Effluent
Temperature
(October 1 — May 31)1
35 °C
(95 °F)
Daily
Grab or
Instantaneous
Effluent
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.
N

Pen -nit 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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Location
Flow
Weekly
Instantaneous
or Estimate
Influent or
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 Copper'
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.
F1

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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Location
Flow
Episodic
Estimate
Effluent'
pH
Episodic
Grab
Effluent
Oil and Grease2
15.0 mg/1
20.0 mg/1.
Episodic
Grab
Effluent
Total Suspended Sohds2
30.0 mg/l
100.0 mg/1
Episodic
Grab
Effluent
Fecal Coliform
Episodic
Grab
Effluent
Total Iron3
1.0 mg/l
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 occurrence
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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Location
Flow
Episodic
Estimate
Effluent'
pH
Episodic
Grab
Effluent
Oil and Grease2
15.0 mg/1
20.0 mg/l
Episodic
Grab
Effluent
Total Suspended Solids2
30.0 mg/1
100.0 mg/1
Episodic
Grab
Effluent
Total Copper3
1.0 mg/l
Episodic
Grab
Effluent
TotalIron3
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.
no

Permit NC0004979
A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfa11003)
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
I 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 (Outfa11004)
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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Location
Flow
I 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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location'
Flow
Monitor & Report
Monthly
Pump logs or
similar
readings
Effluent
Total Suspended Solids
Monitor & Report
Weekly
Grab
Effluent
Carbonaceous Oxygen Demand
(COD)
Monitor & Report
Weekly
Grab
Effluent
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 CLAMIDEBRIS
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.

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 TGP313, DWQ Form AT-1 (original) is sent to the below address. If
reporting Chronic Value results using the parameter code THP313, 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:
_ AllenSteamStation
__......... ---........._._._ _... _.. _...
(2.) Permitted Flow (MGD):
No flow limit
(6.) County:
i Gaston
(3.) Facility Class_ —
I
(7.) Regional Office: Mooresville
W) Pretreatment Program:
_- N/A
- -.... .
(8) USGS Topo Quad:
._._ ....._.. _._..
-j G14NE _
-
(5.) Permit Status:
Renewal
(9.) USGS Quad Name:
Belmont
Stream Characteristics
(1.) Receiving Stream:
Catawba /
(7.) Drainage Area (miz):
??/635
South Fork
CatawbaRivers
-
- ..
........... -......
(2.) Sub -basin:
03-08-34
— ......... ----- - --
' (8.) Summer 7Q10 (cfs):
95/124 _.
...........__._._......__..._........_................. ._.... --._._... --
(3.) Stream Index Number:
................ _._............._.......................... _._.__...--- ......__._.._....._...
— -- ....._._.._.__... _-_;_..__.._......._..._....._._........_._.....__._...._......_......__.._..---.._—_......_..
± 11-123.5 (9.) Winter 7Q10 (cfs):
--1—_ ----.._._..__._......................._........._..._......_..._.........__..... -- --
—
i 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
._.24...(Chitfa11002)........-------
. (6.) 305(b�...Status:._...__..... - ._....._....-_...__
_.............._....._.........._..__......._._...-..___..(12.)...IWC...%...........----..._............_......._.....
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
Page 2
Duke Power/ Allen Steam Station
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
Page 3
3.0 Compliance Summary
DMR Data Review
Duke Power/ Allen Steam Station
NC0004979
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 jig/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
Page 4
5.0 State Contact Information
Duke Power/ Allen Steam Station
NC0004979
If you have any questions on any of the above information or on the attached permit, please
contact Jacquelyn M. Nowell at [phone].
Copies of the following are attached to provide further information on the permit development:
• Draft permit
• RPA analysis
Signature ,,V. I-_ / / ' ,
Date f L �"I
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
NC0004979
Time Period 10/2006-12/2008
Qw (MGD) 19.3
WWTP Class I
7010S (cls) 95
IWC (%) 0 7010S
23.948
701OW (cfs) 95
® 701OW
23.948
3002 (cfs) 314
® 3002
8.6984
Avg. Stream Flow, OA (cls) 2470
@ CA
1.1966
Rec'ving Stream Catawba River
Stream Class WS-V B
Outfall 2
Ow =19.3 MGD
STANDARDS &
PARAMETER
TYPE
CRITERIA (2)
POL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NC Was/ KFAV/
n *Det Afar Prod Lie AOewble Ow
(1)
ch—k Acute
Acute: N/A
Arsenic
C
10
ug/L
0 0
WA
-
Chronic: 836
Acute: N/A
Beryllium
C
6.5
ug/L
0 0
WA
---------------------------------------------
Chronic: 543
Acute: 15
Cadmium
NC
2 15
ug/L
0 0
WA
Chronic: 8
Acute: 1,D22
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
WA
_ —:
Chronic: 29
Acute: 22
Cyanide
NC
5 N 22
10
ug/L
0 0
WA
___ __
-----_-_-_----_----_-_-__-_____
Chronic: 21
Acute: WA
Fluoride
NC
1,800
ug/L
0 0
WA
_nic: __ _ __
_---_---- -_- _-- - - - _ - -_
Chro7,516
Acute: 34
Lead
NC
25 N 33.8
ug/L
0 0
N/A
Chronic: 104
Acute: N/A
Mercury
NC
12
2.0000
ng/L
0 0
WA
_ _ —
— — ---------------------------
Chronic: 50
Acute: N/A
Sulfates
NC
250,000
ug/L
0 0
WA
_ _ _
_—_----_-----__—_—_---_—_—_—____
_ _
Chronic: 1,043,916
Acute: 261
Nickel
NC
25 261
ug/L
0 0
WA
Chronic: 104
Acute: WA
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
ug/L
54 54
17.5
No reasonable_ potential to exceed the allow_ables_._
_ _
Chronic: 21
Recommendation: Limit for Se can be removed. Quarterly
monitoring for Se should remain for outfalls 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
WA
_ —----------- —---_—_— —_—_ —
_ _ _
Chronic: ---209--
'Legend:
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
'• Freshwater Discharge
4979rpa2009semod.xis, rpa
4/2/2009

o: 03 8�U�
1^ CV
rn <O V of
r V C)
n 3
H> t'ro�'
m LILO > d
p c _
y N >7 N N .
C J r t0 O O r m �O N N O dD w r m r M r N N uO N M N O r 00 .- V O 0) W V m w M t0 M
N C7 M cn V N� m V CCI Oi N V N 07 m� c0 O V 0 m 0 r N m N mIt N m't M M M fO of q w N V V N N N V N N
N
CI O
cn m
rCO00 MmmNO V WM Ciw6 LONmmm CO rmrmr�NUn10C4q hraD�� V mmw 0V CDm0001
N Cl) m N ('� M (7 V N V O O N V M m m V' CO C w m m r CV m cn co V M m V m m CO m y LO CV V' V N N N V N N
N
0
�QO o
N
0 N
0-6 C
O
.-N0 V m CO r m"I o2 TmOr Wm0 NmV MCO r wm0 Nm oar w mp NC+� M�p rCp m0 NM V 0W r m m a m a
�r-.-�r��.-.-.-N N N N N N N N NN m M m M m m co co m V V V Q V V V V O V to woomMONNmmN

\o�OF w H rF9QG
DU1Q r
O �
STEPHEN IMMEL
GENERAL MANAGER II
DUKE ENERGY ALLEN STEAM STATION
253 PLANT ALLEN RD
BELMONT NC 28012
Dear Mr. Immel:
Beverly Eaves Perdue, Governor
Dce Freeman., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
F.Division ol' Water Quality
January 28, 2009
�..
Oft -Surface water Pro 6t; j �m
Subject: Acknowledgement of Permit Modification Request
Allen Steam Station
NPDES Permit NC0004979
Gaston County
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.nowell(a)ncmail.nct . 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,
aurie Singleton
Point Sourcp Branch
Cc: Central File
fiei1 C3I"iti Man
Permit application file NC0004979
tt1,C
NofthCarolina
, li rrturn!!y
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.ncwaterquality.org Location: 51-2 N. Salisbury St. Raleigh, NC 27604 Fax [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycledl10% Post Consumer Paper

rVE
ke
rgy,
Carolinas
August 29, 2008
DUKE ENERGY CAROLINAS
ALLEN STEAM STATION / 253 Plant Allen Rd.
Belmont, NC 28012
704 829 2350
704 829 2370 fax
S E P - 2 2008
Mr. John Lesley NC DENR MRO
Mooresville Regional Office
North Carolina Department of Environment and Natural Resource"SlUrfaeeo Water Profeam
510 -Fae+ Center Avenue, S1.iite 301
Mooresville, NC 28115
Subject: Duke Power Company
Plant Allen
NPDES Permit Number NC0004979
1VV0 t,vT ::� LvOO bZ277
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 271h at 8:15 am. No adverse impact to the environment was observed.
If additional information is requested please contact Don Scruggs at [phone].
Sincerely,
StepheW.Immel
Station Manager
www.duke-energy.com

LA
be Allen Stowe- EC13K
Pat McCabe - EC 13 K
Steve Immel- Plant Allen
Don Scruggs- Plant Allen
Record Number: 404.060.01 (lant Allen)
CERTIFIED MAIL: 7099 3400 0012 0549 1754
Z�., � �11010
A

Duke Energy
Allen Steam Station
Contractor - The Consortium of
USFilter Waste Water Group
and Ism
Crowder Construction Company p Q
Owner - Duke Energy
General System Description g.
t&441%fC.
J
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

,
GENERAL SYSTEM
PAGE 1 OF
DESCRIPTION
A
Siemens Business
Allen Steam Station
B
Revised Per Alstom Comments
PROJECT CODE
57001328 1000
DOC TYPE DOC =
(D-SPEC01) 02
1 FGD VV WTS
A
Pennit Application Issue
REN
DESCRIPTION
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
5
4/28/06
DATE
FILENAME:24008001-(57001328-1000-(D-SPEC01)-02)-VIRBB.doc

_—_ —
A Siemens Business
GENERAL SYSTEM
DESCRIPTION
PAGE 2 OF 5
vRc iF c CODE Doc TYPE Doc a
57001328 1000 (D-SPEC01) 02
Allen Steam Station
1 FGD WWTS
B
Revised Per Alstom Comments
5/10/06
A
Permit Application Issue
4/28/06
RE\
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.
FILE NAM E:24008001-(57001328-1000-(D-SPEC01)-02)-VIRBB.doc

0 = � GENERAL SYSTEM PAGE 3 OF 5
DESCRIPTION —
A Siemens Business
Allen Steam Station B Revised Per Alstom Comments 5/10/06
PROJECT CODi: DOC TYPE DOC # A Permit Application Issue_ 4/28/06
57001328 1000 OD-SPECO1) 02 FGD WWTS I RED 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.
FILE NAME:24008001-(57001328-1 000-(D-SPE C01)-02)-V I R BB.doc

A Siemens Business
GENERAL SYSTEM
DESCRIPTION
PAGE 4 of 5
NKc me i CODE noc rvrE Doc
57001328 1000 (D-SPEC01) 02
Allen Steam Station
FGD WWTS
B
Revised Per Alstom Comments
5/10/06
A
Permit Application Issue
4/28/06
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.
FILE NAME:24008001-(57001328-1000-(D-SPEC01)-02)-VIRBB.doc

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 UOC = A Pennit Application Issue 4/28/06
57001328 1000 (D-SPEC01) 02 FGD VV VV TS PEN 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.
FILENAME:24008001-(57001328-1000-(D-SPEC01)-02)-VIRBB.doc

Ronald E. Lewis
Duke Energy Company
Water Management.
EC13K P.O. Box 1006
Charlotte, North Carolina 28201-1006
Dear Mr. Lewis:
Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
May 22, 2008 MAY 3 0 2008
NC DENR Milcu
UNQ-Surface Water Protection
Subject: Authorization to Operate
Temporary Cooling Water Intake Structure
NPDES Permit NC0004979
Duke Power/ Allen Steam Station
Gaston County
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 Iocation 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 CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES

PVNCO004979
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 [phone], extension 512.
Sincerely,
s
Susan A. Wilson
Supervisor, Western NPDES Program
cc: Central Files
NPD 004979
—Bryn I racy/Environmental Sciences Section

March 4, 2008
Mr. Don Scruggs
Duke Power Company -Allen Steam Station
253 Plant Allen Road
Belmont, NC 28012
Subject:
Dear Mr. Scruggs:
Michael F. Easley, Govemo
William G. Ross Jr., Secreta
North Carolina Department of Environment and Natural Resourc
Coleen Sullins. Director
Division of Water Quality
Compliance Evaluation Inspection
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County, NC
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 [phone].
Sincerely,
for Robert B. Krebs
Surface Water Protection
Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
JL
0.
�� •..
N rthCarolina
;talus!!; NC i.LN 4
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
EPAWashington, D.C. 20460
Form Approved.
OMB No. 2040-00
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'r� 19 20
U U I NC0009979 ' I 08/02/28 I U Li U2�
+u-+ ��--��
Remarks
21111111111111111111111111111111111111111111111116
Inspection Work Days Facility Self -Monitoring Evaluation Rating 131 OA Reserved
80
67I 169 70I 41 71 INI 72I N I 73 LU 74 "I I I I I I 11
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)
01:30 PM 08/02/28
06/10/01
Plant Allen Steam Station
Exit Time/Date
Permit Expiration Date
NCSR 2525
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/ i z "t-6
�!J
Sign re of Management O A j2evie _ Agency/Office/Phone and Fax Numbers Date
Marcia cco MRO WQ//704-663-1699 Ext.2204/ b
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page # 1

NPIDES yr/mo/day Inspection Type
P331 1 11 12 17 18
NC0004979 I08/02/28 I ICI
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
No violations were reported in January December 2007.
It'll
LI
Page # 2
1

Permit: NC0004979 Owner - Facility: Plant Allen Steam Station
Inspection Date: 02/28/2008 Inspection Type: Compliance Evaluation
n_-ea v-- - uw ur
(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?
M
❑
❑
❑
# Are there any special conditions for the permit?
❑
❑
M
❑
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?
■
❑
❑
❑
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?
❑
❑
■
❑
(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?
■
❑
❑
❑
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

Permit NC0004979
W0P1.'.e'tFi"'Date: 02/28/2008
Owner - Facility: Plant Allen Steam Station
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?
❑
❑
■
❑
Is flow meter calibrated annually?
❑
❑
■
❑
Is the flow meter operational?
❑
❑
■
❑
(If units are separated) Does the chart recorder match the flow meter?
Cl
❑
■
❑
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)?
■
❑
❑
❑
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees?
❑
❑
■
❑
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees?
❑
❑
■
❑
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 ❑ ❑ ■ ❑
Judge, and other that are applicable?
Comment: The system is a physical chemical facility. Online pH measurement is used
for pH adjustment.
Upstream / Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit (frequency, sampling type, and sampling location)? ■ ❑ ❑ ❑
Comment:
Page # 4

CORPORATE EHS SERVICES
4
hDuke
Energy®
February 25, 2008
Mr. Sergei Chernikov
North Carolina Department of Environment
and Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Duke Energy Corporation
526 South Church St.
Charlotte, NC 28202
Mailing Address:
EC13K / PO Box 1006
Charlotte, NC 28201-1006
C�
F FB � 6
Raleigh, North Carolina 27699-1617 ADO/ N/?_ 2008
T
N
Subject: Duke Energy Carolinas, LLC �TF/�
Allen Steam Station #NC0004979 — Gaston County
g
Drou ht Related Mitigation Request
Dear Mr. Chernikov:
ticy
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 Noling water flow of these systems represents an increase of 11 %
(summer 2008) and 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.
RE
C. rya
MAY 1 5 2C08
www, duke -energy. corn
NC DENR MRO
DWQ-Surface %later 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 relewis I gduke-energy. com.
Sincerely,
Zn
Ron Lewis
Water Management
Attachments
cc w/: Bryn Tracy — NCDENR Enviromnental 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 I 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.
SummM 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 19941, 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.
1 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.

a r a i 4y7_�
r."ff � Poarar a^G
Lake Wylie
Sample Locations
0
Plant Allen=
242.
" 245.0
235.0
219.0
219.2
Catawba �1
Nuclear
Station
215.0 200.0
0
Wylie Hydro
180.0
205.0
201.0
179.0
0 1 2 3 4 5 Miles
N
%V + E
S
a Monitoring locations
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.

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.

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.

� va
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.

Figure 5. Discharge of water pumped from the Dan River to Belews Lake in North
Carolina from January through March 2008.

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.

vm'
.~.-~.
._
�

Duke
(Energy,
Duke Energy Corporation
526 South Church St.
Charlotte, NC 28202
Mailing Address:
PO Box 1006
Charlotte, NC 28201-1006
January 24, 2008
NC Dept of Environment and Natural Resources QA
Attention: Central Files F� 2 0 �00$
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy
NPDES Discharge Monitoring Report for:
Allen Steam Station - NC0004979 - Gaston County
Belews Creek Steam Station - NCO024406 - 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 - NCO080781 - Lincoln County
Marshall Steam Station - NC0004987 - Catawba County
Riverbend Steam Station - NC0004961 - Gaston County
Rockingham County Combustion Turbine Facility — NCO086665 — 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 forI—ndur7-are 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 [phone].
Yours truly,
Patrick J. McCabe, P.E.
Manager — Env Field Support
Attachments
/phs
NC DENP KDO
D4 U- ur'ace VVGter PrOteC#ion
www. duke -energy. com

V" t.
!AN 29 03

EF ENT
NPDES PERMIT NO. NC0004979 DISCHARGE NO. 001
FACILITY NAME Allen Steam Station
OPERATOR IN RESPONSIBLE CHARGE (ORC) Don Sc ggs
CERTIFIED LABORATORIES (1) Duk@oPower Env. Services - 248
CHECK BOX IF ORC HAS CHANGED
Mail ORIGINAL and ONE COPY to:
NCDENR / DIVISION OF WATER QUALITY
WATER QUALITY SECTION
ATTENTION: CENTRAL FILES
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699.1617
MONTH December
CLASS I
GRADE I
PERSON(S) COLLECTING SAMPLES Staff
OF OPERATOR IN RESPONSIBLE CHARGE)
S
FEB 18 2008
_ YEAR 2007
_ COUNTY Gaston
_ PHONE [phone]
(2)
//7l
By this signature, I certify that this report is accurate and complete to the best of my knowledge.
DATE
Grab
0--_---------
Facility Status: (Please check one of the following) DEM Form MR-1 :.d 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 awar that there are signikcant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
1048
Stephen J. Immel 7
Permittee (Please print or type) Signature of Pertitt 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.

A
EFFLUENT
NPDES PERMIT NO. NC0004979 DISCHARGE NO. 002 MONTH December
FACILITY NAME Allen Steam Station CLASS I
OPERATOR IN RESPONSIBLE CHARGE (ORC) Don Scruggs GRADE I
CERTIFIED LABORATORIES (1) Duke Power Env. Services - 248
CHECK BOX IF ORC HAS CHANGED
Mail ORIGINAL and ONE COPY to:
NCDENR / DIVISION OF WATER QUALITY
WATER QUALITY SECTION
ATTENTION: CENTRAL FILES X
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
PERSON(S) COLLECTING SAMPLES Staff
OF OPERATOR IN RESPONSIBLE
(2)
FEB 2 0 2008
YEAR 2007
COUNTY Gaston
PHONE [phone]
By this sIgnature, I certify that this report is accurate and complete to the best of MV knowledge.
DATE
-71
000--QO-0-00-
Facility Status: (Please check one of the following) DEM Form MR-1 (8/94)
All monitoring data and sampling frequencies meet permit requirements O 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 fi nt penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
Stephen J. Immel 8
Permittee (Please print or type) Signature of Permle 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).
"B 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 coldorm is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting data.

EFFLUENT
QA
F E B 2 0 2008
NPDES PERMIT NO. NC0004979 DISCHARGE NO. 002A
FACILITY NAME Allen steam Station
OPERATOR IN RESPONSIBLE CHARGE (ORC)
CERTIFIED LABORATORIES
CHECK BOX IF ORC HAS CHANGED
Mail ORIGINAL and ONE COPY to:
NCDENR / DIVISION OF WATER QUALITY
WATER QUALITY SECTION
ATTENTION: CENTRAL FILES
1617 MAIL SERVICE CENTER
RALEIGH, NC 2769961617
Don Scruggs
(1) Duke Power Env. Services - 248
PERSON(S) COLLECTING SAMPLES
MONTH December YEAR
CLASS I COUNTY
GRADE I PHONE
Staff
X ,mil ��� -e-­' ':::G
(SI NATURE OF OPERATOR IN RESPONSIBLE CHA
(2)
By this signature, I certify that this report Is accurate and complete to the best of my knowledge.
2007
Gaston
704-829-2350
1/2/�
DATE
Facility Status: (Please check one of the following) DEM Form MR-1 (8/94)
All monitoring data and sampling frequencies meet permit requirements OX 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'
Q�
Stephen J. Immel �I
Pernittee (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 pernittee, 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'Iform 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
FACILITY NAME Allen Steam Station CLASS I
OPERATOR IN RESPONSIBLE CHARGE (ORC)
CERTIFIED LABORATORIES
CHECK BOX IF ORC HAS CHANGED
Mail ORIGINAL and ONE COPY to:
NCDENR / DIVISION OF WATER QUALITY
WATER QUALITY SECTION
ATTENTION: CENTRAL FILES
1617 MAIL SERVICE CENTER
RALEIGH. NC 27699-1617
Don Scruggs GRADE I
(1) Duke Power Env. Services - 248
PERSON(S) COLLECTING SAMPLES Staff
OF OPERATOR IN
(2)
YEAR 2007
COUNTY Gaston
PHONE [phone]
By this signature, I certify that this report Is accurate and complete to the best of my knowledge.
DATE
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
property 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 -.<A- Q_ Q
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 collform 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. 003
FACILITY NAME Allen Steam Station
OPERATOR IN RESPONSIBLE CHARGE (ORC) Dort Scruggs
CERTIFIED LABORATORIES (1) Duke Power Env. Services - 248
CHECK BOX IF ORC HAS CHANGED PERSON(S) COLLECTING SAMPLES
Mail ORIGINAL and ONE COPY to:
NCDENR /DIVISION WATER QUALITY X
WATER QUALITY SECTION
ATTENTION: CENTRAL FILES
MONTH December
CLASS I
GRADE 1
(2)
Staff
F ECb on
PHONE [phone]
1617 MAIL SERVICE CENTER (SIGNATURE OF OPERATOR IN RESPONSIBLE CH
RALEIGH, NC 27699-1617
By this signature,) certify that this report is accurate and complete to the beat of my knowledge.
DATE
-------------
Facility Status: (Please check one of the following) DEM Form MR-1 (8194)
All monitoring data and sampling frequencies meet permit requirements 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."
QStephen J. Immel '
Permittee (Please print or type) Signature of` '" 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 pernittee, delegation of signatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(0).
—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.

+[ . 4.0 v� - 'n.; T-_;F!4�' './ol..`$S�'lcgt77s't'j ^-.�w,� �', ,�r}.. ".'' R'J_'�i
4 i '% r R 0 '-', i •. - r k "t, '�. j' � y r 'S8 ti'� �, , f - -t J ait
4'i`r dd. f' .R �,A is i, * ,I I. �. V'-A,li4. r.• ' •� }�, ♦ ♦1., .�
�" �'R!j S} ;li a , `r .? .5 P 4` p '; r 4 V. ., iy' f .)Os �
I'^xi +k , ;, v* f,, ? . , a .kt, k g7;rR „ry{4- «�:," r r5,rr '+G1• ' C.
"
1-. } r- y &Y r �f�1ti,a,.'. ,"G. r1} r1:1.} F'� g' -rlrl t kl '' 'fir' 1 i ",-k
' ,I ft � : Ni '. A-yJyhf �Fl"iilr ffr,, f <xr,+.� rLr.�i� :`.+T ": 1 �'•, r t ? t T � � bA � � �k21 ,P `' r � - }
r t �, . �...Qt ^�a k. .� .'i "'•ram '4,�Ar, �/�.. 'i . ,� �,,. .Y:.. i . tt. 4cin I •fir
-- i dtr� ,1.1 �' I r ' �?T"' y 1.y4 �t IF; it by d e +r
k 1 4r 'e y A t <.� fi 1 c, i h a {Mj {.: J 1 w it F�f y. � It A . w ,; a p1
Ki Ij rtl / ��{ . ''yyl,� _ , tyj - f �.. .i.� #w .'�pr`V�1r 1 rs.ty r -r..� S - +'.. �.4w ` P 1 z'Y* 1'� - �+ +wr` #��hyy)
#I- ' �•1 >3 k r S^I.$ Y 4 ynl dr G > % N r e : IF ! � - µ i :4 •
I f >a 'y� �r ,x i 4i.s ♦r . -x r - a• ! F':. ' Y.r t ti
.10
.11 :'l: Nd 7�'iC•,. ,jy �'� `'j,� i ! G ,. 1441 � t- a 1, j A d f `: �. '1 r 1 a.
r •a . ap r . $�% :. 1, ti , n k rf� a . ? �' ^�y,, 'yak, " a r �,1 tj ' ^ ri,p`, , ,. r I'll+
11 a •'.y � `t, R+5 c H4^w W'Mlf'- a �,: r ` k t �. , j.., k..,'y: ., MF�, , , • i } ' �44 , f r ti�6 .. .,qw
".n I :, k. t"{` a€' Ir 3 a64 ;)", r ! ,jy,, .. =" J t J. d:.. , - 1 _
'r v. 1.J 10�'1" 'stortc'; ' ,� >r e! H R�`�wJ„f'r-11 !r telly ,r r�' p, I .. ` l' Ye }.;,.
,, { ,, n[ �y;T+- I y .r. S. - yr' •f I A N �T. r
fy Is_t` r ;; "'. ti N" 'f�'a M 2r!W �' tr �y F'Lll 1 r a II•Rk ? { !r * t t� tr yh�. '�i- ! 1 !
,, Y t
n`"�JY R hI ' , r�t't� I �+ t i _ { h ✓ •' 'It' N aF �� k kii 4 l 47 .. . r �, ,K.4 rr
1" a11
i Tl. f7J ,r¢-. r ♦r Gl i Y! �q=7F y 71i, .'t 2s V r' 3 % �k:�li^ . 1w{ i't �Y +C h t is t'
tI , , ff < 4 F � � Y -
t tj I.111IR c� t +. r v! ' s t<f�41 �, ,- g i . ,. y ih �, , I - R + �, ,r f -rTAr My... 't*"'.� }+sa. �� 4t. +I .r y� .•�'° rh ♦ 't ..1't p.« ?Yyp .••,..
.rr .A .}T,i. } a N' i i. ,A+ht 'Rk 'i kR; '�Y' i h J} �. f4 +G,17: ,� .x.:T` t i tri1 44, ..� :i:
t r e +a „I SW'."':' -l^orl r'tyrlf.-�'r"� ,S 'S « -�' k'-q4. } r---!!'` -t 4l J •t'x`" y,a� j}�f..r a' .Y�ww, �.lr,.ei.s
,!li' t ' r � s'X,.�.,i} - s'r fN,� t �5'i��ll� ^P l r'` ,r�! �}' '°'k4-R^+''. '? Y'1 t� - . 4 �.
'I. � !a N ...i �,,r4 Lt ...•Y : yr„1P $ .ry fvr a I G i. 3!, T4 '¢ 1.Y ,w'! t. 1 4
,., �� o1� y��, "i or fi'E e�p` . °v ���iyT• �f sc sY c 'MF Yli� 1' .ti i
.y ► h!` iti , 8 I r+�.{«• "y �a � ;K ,��. r,JY P7 �R.��•Yx.'+.yiF t�ir fir. .� r .7 , r Nplbi .�;I
l - t„ , -..x. • -SF... '} r - r'+iJ. .p .�,. . +.' 3. .. s t n "' t 'k r ., ., N' ' f 1 .!t ^tl. r ?' [+1. d
r f - i. ,r,} 't' a �}• 9 �. r �y� e-At.:-'r yt' k. +Ci.. . - .1 li}.. t" `, ,�{.-+r. .,r...�,i �[,
1 : ,N ai.s« -,L I G a t . w jrr J i gam( a x : ,,� .s + ...z " Li : ,j%
:I ` .i - -fI' r ., l..; , SM t 5 r > ` }F.d.'+ry, *, k,'nti ->�.7 t r4 -, ,��I l ',
,< t r... d. ,:{.&T . .11 .� .. L - . r yn �.• .Y f, ♦+d ,jam ^ " _ :r �N , , , -15ti•,a .Jr
•H. ♦ r 1t=•A: r - I. t rr- v rr ":� lr-: .bt Y �L''y�% r ' {'lam 'z•..gq7t�>fif' ,
I... Im ..r! .,. _� " , diN-7..., "f r^iZ x - 7 . r1 ti .,C i.Nf i . +'
i k r n � /_ ' fit.. •e 'u '] •t
. - _ r ♦ I t .,1' 'o - ,rr ., . ,; , .q , �1 ,� 'r` i 4w. y �} M.
. l ' .. 1 f • 6. 01I #X ;4.1 .Y. '� 1' - J. _ , ., -4 . i «, n o ' 't,. - � � � � - 4 :.►. -W � .
' f .ul � i, ;: .�-. ., - r 0 rJ .w�• i ,r .u. ' I. M +'. � 4h'n r 1 e , 1
Ili-� f 1. , . !" * t - �I, rt, . ,�, ,' .I..r .' 4 Ca a- .t .+ I.w- 9:r I F :ti a'- , I �" -i RIB. �1. 11 ;
..+,tr,t `r, eTJ •}Qgl $t. .s 4. r.:; fN.• T'"' - ' _ t'ei , e. [{rN�: i I r-' �m q y,� M.' 4 C 'di,
s t ! it5f } 33""`CCTF 111 L `�} Vr6, : pi I I,' s V 11. t . h',.
Inc r{� jr. p '" %C1't�a ' �r redq i ` a n r. e : r: t 7 : kt a �j ?y d ..
.1 ,. Jt:+,., .r4, 'jlnrt Ji..i : ;_d:lMief .. ; t4 M '. .i i•'_ srnl.. .1 �t t.. Y� �. . �.. J�♦
r ».t, ` r...$ i : �.. �!� • _. y <. '+F' .!' , K,Y «Gr •- y. ad' c.r w�� ..�.I...,Mla' yh A'�P j��i i It.�..&. x* -
k.
r C I r 1 PC ; y :,t ka _ a i.. ram -' n -.I, n ?
,....:. .1 iwK' 4' i' 5t�6:., aY^ nr Yy :. ,.r Y r } I •¢t •r ^ ^,,'�'1` -� :1}• i. #_ 'i
tv'.I�l
t t a i., 'e I,' `P dr. >r, r +,
if*il�
' ,rl' s'". "'�k�'t` ir,:.Ak' W � � � ', C' -.1 � �.�. �� ,x i. Elti �'e R'?'r,t 1•tfr ,. � -w, �.yn+ y, '. A yc 5 1, ,vc": + , e 1ty�.ti1. ` . rb 4 - 'i�r :, { 1� . k' Ki:S '* J • ,•' ;,4. r
;n : Y d* `T�"} ,.'-' �• I -�j- �V'. f II , s ,,'may::1. r '. r .i
I. I,,h , ,�',,�, R',W�t'� / S,. 1 y - 1. Y .f t 'Ri•Wb J s r ..W sX,.w I r' r, a ?I Tr
atv ��y
«1 y'ki ` "�' 4r d r M' �.,rw ,}+, �, H.ir -a. r P' Rit .n i':..! rtV• ," '. , �'' ly ibM
r' ? '""' Ear �' r'7�,rk t�1 5a� r I �' t ... -. 1 :1 k yr i` r } 7 to.t .L £ . y-. nt . ti yt..�
^r 7 �# r d wf k Aker r` ( 4x y+ r 1 * 1 { ` .;
} , 1 i -Wt t �. : 0h aE� i ; , ^ vs yN7 T,st{.�r+ � : J N r• 4 t . j.
,,:: I t y �: t= rf`f �t[•'1«; b4.}, ...y 4.,, '1" �!'1 J. r,� •. �,,.. it VL :: ! . '' ,J. j� 't- `A Mrt - �Jy • , ak,' r,p '♦7
•3py",� , r S r 4 t 1 t '
`�'-, _ �.� AI I-t '�' r Y -ARM# oCU'" t,... J' �j t:7L1 J^ ... + ' ..G+ A 7. ✓•4�* 1.Iy r R L7':
1 4, t .. N x IY .1 p,+• Jy..... A. .y t''. �. - ! TSM ' X. .. I iw- .� .eMR•.'1 r ..:h.,; Y
-,„'J'aT -%. Y ly L'Y jyq 4}."j�Yy� I Y a_ 1 R
yw .Cf J # , 'T`l 9 .,�1' l• � . I L,t•'.W Nr , { 'rpi rfT .+f
Ali 1 t A l D 1 1'4' K _ t+ � t :� ',
ii, r: M..�Y1. y. r'1.L i IP '. s' r h b T
�' r _ Jt.,..,1 'fA.,', >�k }•y'' �4 „':t •" i rN ` w �5 ., a t
t r +i yt. T1. ¢ R
Y i .rani y,.✓.' .' ,X jt •h'i.'x if .rk ri`,1'•.�' i. ' '"" '.; ,. ". «� � r�ti.. fit ..,M '?k5`,�'},^'i '° 4" Q- S
.:k -^t f ,ht p7u.t.41 �'y ^!- .I -.I- y �.., t ,; -« . „Ar c..+f.I.„. :.,w �_.
' Jy{ 6. 'y n t f 1 _ I 'ft .
r . a•vM/r .n. JFn �a, v^t" f. S ur.i .I y c+Z- _ - j1i!n' .;Pr•-?" 7S°'w .gk, i.. -I;M- - ' :.,.A .n
:[ 1 "K k , y �' v 9 i 4< k
i.ti. �i'«E,+�' _ ',4 ^ti .:».• `rti-.���[sa '� - _ r. : S, 1-ur 7r.; r.'e r :t- .y ..�y. J.�.d `J ., �.k •rh�i '
, . , . . f
1.1 41 }}
ky s; N fly, t' _ t 'i r�A _ .` ,h r' . a '. rt. r.,"-r. ,. y I; ! -
r t
4 ra ;l f� i r.,. 11 L,t _- r - f v Z..l. �('_ PI - f, N4 � h•., I� �:'1. 1 4 ,
.rl.+rt1. ♦ +�. _ "$ .�, grn, x .Ct. ..0 ., t .f,••.. t If t . , )`5'F t^1 } ii w. .� r'*'k `i �+~
$ a
. • - 't b r •-� T +r k ✓., } r 9 N+' r'9 i. A"t,. /_. s n 1 r �i'� .1' '.� ♦- , 'ip" 'r+n". , 'i'�!, j j
J
! - I. t I .i I t 1 f h ramr�, ... �,;, a T , ¢ .✓' in -
j�
C I 11 IT 7geiA. r- i ,f" 'r`4t! 4 �5 1.' (_... r ''+..y •,C.11.;� .ir tlM(f`vr .T.�t G 4,ro. .•Y '."It 4.
,6� 3''4`
s .� i_; tL PeS.. c r 9 .:1 y�^t t. - .. r - � I � •' Y I- 1 " � wi1 `y.# Z, , ,v ,..' a g' 41 I {, _ .; r R-:I 1 at",io 1'as ..sy !' y iJi T+,i.
,,YY �]jy� �,%•'j�^ { P'Y.r }• ,,,,�.y Y �i�ty`'-I' Y - I. i
�, ,Kk O R' A,4, ^, ... ^ ^ jt .V,� �11 * .rj , . jf1 • .. - .. �`.f•n'T,•(I,.,,; Nf t�1{�, a '
Zlt ; O ' S Wi. '-7',JL '(_ yl^ i dY -wF I, +7 }I
y 7 n i •a1. +.1 :31 f,�' '7Ff rNF �. ,r r ear' ; Y
11t,
a.. aP IK ,•,!-1.} t. s.f,{w.1, I'i ki i i•P...L rr I wr .,�"�. gr�f / fi, ro t ...
lt�". '1.j' N�.M!! nr 1' • i 4 '«6 1 't"� � . ", - ,.�ii• 7.6fa1 - ' I` ..1 .IK v ` I .. �,. _ r - .ir,, i.�, `' i ;:
AI - �S„ j I,I. ',�a R'•tl �.. �!I• �f,� t rtl 1 '�' e�., :�•. r13,.. 1 ::r ,t�. j� F - r '` ,,
I .;,, r (� N `` I x .` rA t _ y, r '1� r '�1. h S ' S -. G i1 R
H + r I ?I R ' t iL ' 1 nP
^s+, a 7Ylt;, �' i ..igIk �r+,' ,ly"✓ I:�'r* aa'ti. i'•e�,Tm-1' •f '.,12 1✓ !. .may �Ir, ... ,.+{ a,
•l' ♦. R ,•ir r Sj5''.tw,' a r t.k 5' ,.h'r , Ir ', - "F� �:. l T .r � t r �
4
ri ''a.:.r t yyrer-' : t ,'t I'" y:� .ii & .: c. /
^.14_, r-r:'.t. I._/} __: alr M.• iC }rVS-- n :r't✓':}rJ » ysCd r t h mt. r '- 4' _ '"lY9r rva.J1 - • :I. :: `'a qy y1� e
•r _ - ...16di1. r �� . 't"�'. .5tt..Ts :a., _ _ - iti •��

NPDES PERMIT NO. NC0004979 DISCHARGE NO. 004
FACILITY NAME Allen Steam Station
OPERATOR IN RESPONSIBLE CHARGE (ORC)
CERTIFIED LABORATORIES
CHECK BOX IF ORC HAS CHANGED
Mail ORIGINAL and ONE COPY to
NCDENR / DIVISION OF WATER QUALITY
WATER QUALITY SECTION
ATTENTION: CENTRAL FILES
1617 MAIL SERVICE CENTER
RALEIGH, INC 27699-1617
EFFLUENT
MONTH December
CLASS I
Don Scruggs GRADE I
(1) Duke Power Env. Services - 248
X
PERSON(S) COLLECTING SAMPLES Staff
11l
YEAR 2007
COUNTY Gaston
PHONE [phone]
(SIGNATURE OF OPERATOR IN RESPONSIBLE CHARGIEe/—
Rv thiw nnhi a I rortifv that thic r .r ie ratn and rn nletn to th. hnot of m., bnn..dn. -
117
DATE
w
o
U
Ir $
FO N
w
a0 ~
w
�Fw-
rn
< Z
a
O
w
H
Z
O
O
wow
oasse
Flow
m
tj
as
O
EFF x
INF
J F
o
HRS
HRS
Y'N
MGD
mg'I
0700
9
B
0700
9
B
3
0700
9
Y
4
0700
9
Y
s
0700
9
Y
6
0700
9
Y
6.5
7
0700
9
B
e
0700
9
B
1,
0700
9
B
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
19
0700
9
Y
20
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
2e
0700
9
B
29
0700
9
B
�s0
0700
9
B
311
0700
9
B
Average
6.5
Maximum
6.5
Minimum
6.5
Comp. (C) / Grab (G)
G
Monthly Limit
15.0
"..,.,,., v. .u. X. ,o wm vna" "" wnvwu'y)
All monitoring data and sampling frequencies meet permit requirements Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements Noncompliant See Attachment
DEM Form MR-1 (8/94)
"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 M G I I -,� 1 0 'S
Permittee (Please print or type) Signature of Pe ttee Date I
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 facilitys permit for reporting data.

Michael F. Easley, Go or t;
William G. Ross Jr., Secretary S(A 6
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
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
1�
NCD94R
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

77N
United States Environmental Protection Agency
Form Approved.
Washington, D.C. 20460
EPA
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 UN 2 ICI 31 NC0004979 Ill 121 07/05/30 1 17 18t rt 19' SI 20U
�I I
Remarks
21111111111111111111111111111111111111111111111116
Inspection Work Days Facility Self -Monitoring Evaluation Rating 81 QA --------------------------- Reserved -------- -------------
67I 2.0 1 69 70 u 71 U 72 U 73I_J74 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
POTW name and NPDES permit Number)
Entry Time/Date
Permit Effective Date
Plant Allen Steam Station
01:15 PM 07/05/30
06/10/01
Exit Time/Date
Permit Expiration Date
NCSR 2525
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)
Permit 0 Flow Measurement Operations & Maintenance Records/Reports
Self -Monitoring Program 0 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
Sonja Basinger MRO WQ//704-235-2202/
Signature of Manageme'nt�Q A R viewer Agency/Office/Phone and Fax Numbers Date
Marcia' %
occo MRO WQ//704-235-2204/
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page # 1

FFVNPDES yrlmo/day Inspection Type (cont. )
3I NC0004979 I11 12I 07/05/30 I17 181CI
LJ
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 0026: 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 0026: 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
(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?
❑
❑
■
❑
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 IoGation 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?
❑
❑
■
❑
(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?
■
❑
❑
❑
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: 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

F,V
Permit: NC0004979
Inspection Date: 05/30/2007
Owner - Facility: Plant Allen Steam Station
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?
■
❑
❑
❑
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?
❑
❑
■
❑
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees?
❑
❑
■
❑
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?
❑
❑
■
❑
Is flow meter calibrated annually?
❑
❑
■
❑
Is the flow meter operational?
❑
❑
■
❑
(If units are separated) Does the chart recorder match the flow meter?
❑
❑
■
❑
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?
❑
❑
■
❑
Is sample collected below all treatment units?
■
❑
❑
❑
Is proper volume collected?
■
❑
❑
❑
Is the tubing clean?
❑
❑
■
❑
Is proper temperature set for sample storage (kept at 1.0 to 4.4 degrees Celsius)?
■
❑
❑
❑
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?
■
❑
❑
❑
Page # 4

Permit: NC0004979
Inspection Date: 05/30/2007
Effluent Pipe
If effluent (diffuser pipes are required) are they operating properly?
Owner - Facility: Plant Allen Steam Station
Inspection Type: Compliance Evaluation
Comment: All outfalls appeared to be well maintained and were readily accessible. No
adverse impacts to the receiving waters were observed.
"NN
IfT3111111IMMUTWIN
0000
Page # 5

F
keergy®
Carolinas
November 9, 2007
Mr. John Lesley
Mooresville Regional Office
North Carolina Department of Environment and Natural Resources
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Subject: Duke Power Company
Plant Allen
NPDES Permit Number NC0004979
Dear Mr. Lesley:
DUKE ENERGY CAROLINAS
ALLEN STEAM STATION / 253 Plant Allen Rd.
Belmont. NC 28012
704 829 2350
704 829 2370 fax
RECEIVED
NOV 13 2D07
NC DMR MRO
DWQSurface Water Protection
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 81h at 8:30 am. 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 [phone].
Sincerely,
G�w
Stephe Immel
Station Manager
www. duke -energy. com

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

PPIPP"'PP,
Collection System SSO 24-Hour Notification
Collection System: SSO WQCS#
Incident Number from BIMS aZbb7 p3Z_33
Incident Reviewed (Date):
Incident Action Taken: ✓ BPJ
'`IXTA
Spill Date 7 Time 4. n am/
Reported Date ) Time am/ pm
Reported To SWP Staff or EM Staff J e�
Reported By
Phone '7 4- u5, Zq�3
Address of Spill l�-n Lna,, �< �( ,
County_ -) A f City
Cause of Spill �I=t � n—k � Ae�� ( �
Total Estimated Gallons 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
1

Permit #
Owner and Facility Name
WQCS00253
Bradfield Farms Water Company CS
WQCS00196
Carolina Water Service Cabarrus Woods CS
WQCS00233
Carolina Water Service Hemby Acres CS
WQCS00001
Charlotte -Mecklenburg CS
WQCS00016
City of Albemarle CS
WQCS00046
City of Belmont CS
WQCS00107
City of Bessemer City CS
WQCS00089
City of Cherryville CS
WQCS00221
City of Claremont CS
WQCS00326
City of Concord CS
WQCS00088
City of Conover CS
WQCS00017
City of Gastonia CS
WQCS00020
City of Hickory CS
WQCS00327
City of Kannapolis CS
WQCS00036
City of Kings Mountain CS
WQCS00040
City of Lincolnton CS
WQCS00164
City of Lowell CS
WQCS00026
City of Monroe CS
WQCS00059
City of Mount Holly CS
WQCS00044
City of Newton CS
WQCS00019
City of Salisbury CS
WQCS00037
City of Shelby CS
WQCS00030
City of Statesville CS
WQCS00149
East Lincoln CS
Deemed Permitted
Permit #
Owner and Facility Name
WQCS00130
Brooks Food Group -Brooks Food Group
WQCSD0114
Charlotte Mecklenburg Schools - Misc Laterals
WQCSDO057
City of High Shoals CS
WQCS00117
Duke Energy Marshall Steam Station
WQCSD0116
Goose Creek Utilities Fairfield Plantation WWTP
WQCSDO101
Harborside Dev LLC-Midtown T CS
WQCSDO095
Kennerly Dev. Group LLC-Boardwalk Villas CS
WQCSDO098
Kennerly Dev. Group LLC-Kings Point CS
WQCSDO105
Kennerly Dev. Group LLC-Moon Bay Condos CS
WQCSDO107
Kennerly Dev. Group LLC-Schooner Bay CS
WQCSDO099
Kennerly Dev. Group LLC-Spinnaker Point CS
WQCSD0112
Lake Norman -South Point CS
WQCSDO104
Lake Norman -Villas S Harbour CS
WQCSDO102
Lake Norman -Vineyard Pt Resort CS
WQCSDO064
Lincoln County CS
WQCSDO097
Martin Dev Group -North Point & Portside CS
Permit #
Owner and Facility Name
WQCS00171
Greater Badin CS
WOCS00322
Aqua Country Woods East CS
WQCS00222
Town of Boiling Springs CS
WQCS00341
Town of China Grove CS
WQCS00231
Town of Cleveland CS
WQCS00058
Town of Cramerton CS
WQCS00165
Town of Dallas CS
WQCS00342
Town of E. Spencer CS
WQCS00328
Town of Harrisburg CS
WQCS00343
Town of Landis CS
WOCS00310
Town of Longview CS
WQCS00120
Town of Maiden CS
WQCS00344
Town of Marshville CS
WQCS00043
Town of Mooresville CS
WQCS00125
Town of Mt Pleasant CS
WQCS00153
Town of Norwood CS
WQCS00190
Town of Oakboro CS
WQCS00325
Town of Stanfield CS
WQCS00180
Town of Stanley CS
WQCS00135
Town of Taylorsville CS
WQCS00258
Town of Troutman CS
WQCS00345
Town of Wingate CS
WQCS00054
Union County CS
WQCS00009
WSA Cabarrus Co. CS
Permit #
Owner and Facility Name
WQCS00120
Martin Marietta Mallard Creek
WQCSDO019
Town of Richfield CS
WQCSDO024
Town of Grover CS
WQCSDO038
Town of McAdenville CS
WQCSD0002
Town of Ranlo CS
WQCSDO049
Town of Spencer Mountain CS
WQCSD0252 All other private spills which do not have
a permit number assigned

o�oF W A
O �
July 17, 2006
Mr. Don Scruggs
Duke Power Company -Allen Steam Station
253 Plant Allen Road
Belmont, NC 28012
Dear Mr. Scurggs:
Michael F. Easley, GovemoM 4
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
Subject: Compliance Evaluation Inspection
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County, NC
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 [phone].
Sincerely,
r_V'1'7Gleason, P.E.
`` y"' Surface Water Protection Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
JL
*�
NCDENR
e Carolina
NyNaturally
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% Recycled110% Post Consumer Paper

United States Environmental Protection Agency, Washington, DC 20460
�. Ti NPDES :^� A NPDES Compliance Inspection Report
North Carolina Department of Environment and Natural Resources ARA Division of Water Quality, Mooresville Regional Office MCDENR
Form Approved
OMB No. 2040-0003
Approval Expires
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
Belmont, NC 28012
704-829-2423
Yes
T
- 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 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

VDuke 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.

FF_
DIVISION OF WATER QUALITY
November 14, 2006
Memo To: Anita Reed, E.I., Project Review Engineer
Construction Grants and Loans Section
From: Michael Parker' Mr
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.

71
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 Aatc\atc06\alien. atc

�O wArF90
�0
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
September 18, 2006
MEMORANDUM A`In ^S
MOC' DICE
TO: Rex Gleason, Regional Water Quality Supervisor
Mooresville Regional Office, Division of Water Quality
SEP 2 0 200t,
FROM:. Anita Reed, E.I., Project Review Engineer
Design Management Unit
SUBJECT: Request for an Authorization to Construct WATER Ql�AL1TY SECTION
Allen Steam Station
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.
CAMA
Well Construction Standards
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 [phone].
Attachment
AR
cc: ATC Files
Anita Reed, E.I.
Construction Grants and Loans Section One
1633 Mail Service Center Raleigh NC 27699-1633 NorthCarolina
Phone: [phone] / FAX: [phone] / Internet: www.nccgl.net
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper ;Vaturally

uke
ergyo
Duke Energy Corporation
526 South Church St.
Charlotte, NC 28202
Mailing Address:
PO Box 1006
September 14, 2006
Charlotte, NC 28201-1006
Mr. Cecil Madden, P.E.
- - .�cr-1. Gr LNVikutiML.4.
AND NATORAI. RESOURCES
North Carolina Department of Environment and Natural Resources
IWORESV1t_t r , ROES
Construction, Grants and Loans SectionOFEICE
1633 Mail Service Center
Raleigh, North Carolina 27699-1633
` SEP 2 0 200t,
Subject: Allen Steam Station
f
Flue Gas Desulfurization
Wastewater Treatment System
Gaston County
k
f�ATR QUALITY SECTION
Dear Mr. Madden:
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,
WV4
Robert Wylie, Engineer
Water Management
Attachments J"cD
cc (letter only):
Raymond Luciana, P.E., US Filter Corporation
SEP P S
Zeb Morgan, PENTA Engineering
Lrai ,'e TM
www.duke-energy.com

F 4
rVE%"ny.
November 8, 2006
Mr. John Lesley
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
Plant Allen
NPDES Permit Number NC0004979
Dear Mr. Lesley:
Allen Steam Stadon
253 Plant Allen Road
Belmont N.C. 28012
704 829-2448
704 829-2370 Fax
,' _ . , . ....-..�.,� .
NOV 0 9 200-
A
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 [phone].
Sincerely,
Stephen J. Immel
Station Manager
www.duke-energy.com

pr
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

Form WWTP-BYPASS/UPSET
Treatment Plant (WWTP) Bypass/Upset Reporting Form 5 Day Report
PART I
This form shall be submitted to the appropriate DWO 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 facility:
Sluce line rupture
Was the WWTP compliant with permit requirements? ❑ Yes ❑ No W Unknown
Was samples be taken during bypass?: ❑ Yes ❑ No UnknowrM
Incident Started Dt: 11/05/06 Time: 06.15 PM Incident End Dt: Time:
(mm-dd-yyyy) hh mm AMIPM (mm-dd-yyyy) hh mm AWPM
Estimated volume of the Bypass/Upset: 20000 gallons
Describe how the volume was determined:
Weather conditions during bypass/upset event:
Did BypassiUpset reach surface waters? N Yes ❑ No ❑ Unknown Volume reached surface waters (gallons):
Surface water name:
innnn
Did the bypass/upset result in a fish kill? ❑Yes MNo ! Unknown If Yes. estimated number of fish killed? 0
SPECIFIC cause(s) of the Bypass/Upset:
. Other (Please explain in Part ll)
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 1 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 11)
Describe:
Were adequate equipment and resources available to fix the problem? [) Yes ONO ❑ NA ONE
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 parry, I certify that the information contained in this report is true and accurate to
the best -of -my -knowledge.- . — _ _ _ --
Person submitting claim:
Signature:
Telephone Number:
Title
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

Collection System SSO 24-Hour Notification
Required Information
• a a a a a a a a a a a a a a a a a a a s s a a a a a a a a a a a a a! a a a a s a s a a a a a a a a a s a 6 a a a a a a a s a a a a s a a a a l
Incident No.
Incident Reviewed (Date):
Incident Action Taken: BPJ
NOV
......... a ...... muss. a .... a ..... 7 ............. as an ago as a a a on a a a a as oa as gal
Spill Date �- `� - r'�_ Time /o = I L am/ 6
Reported Date 1 I - �s Y I? (•r1_ Time D 5a (pm
Reported To (SWP Staff) ('C
Reported By �Dti) �_C ��,rG��S Phone 77��'�Z9-Z. Z
Address of Spill 1-P ✓1
County City (Spill Location),Q2�`
Collection System: SSO
WQCS00
Map Location
Cause of Spill
WWTP Spill: Bypass
NPDES NCOOW4, 7Iq
WWTP
Estimated Gallons d Gal to Surface Waters
Stream -(,VTA
Comments
Jll: 'NO) Yes, How many?
.. - � rtr
r\j�

December
15, 2006
Mr. Robert Wylie
Duke Power
526 South Church Street
Charlotte, NC 28202
SUBJECT:
Dear Mr. Wylie:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
RE
CE-s-
1 r o to ual
J A N 2 4 2008
NC DENR MRO
DWQ-Surface Water Protection
Authorization to Construct No. 004979A02
Allen Steam Station
Flue Gas Desulfurization Wastewater Treatment System
Gaston County
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 1330 F to
95' F); a static mixer for the addition of a molasses based nutrient; a molasses based
NorthCarolina
Naturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.ncwaterguality.org 512 N. Salisbury St. Raleigh, NC 27604 FAX [phone]
An Equal Opportunity/Affirmative Action Employer — 500% Recycled110% 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 [phone], 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 [phone].
Sincerel ,
Alan W. Klimek, P
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
1, , 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
950 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 W
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
Date
Registration No.
Send to: Construction Grants & Loans
Attn: Cecil G. Madden, Jr., P.E.
DENR/DWQ
1633 Mail Service Center
Raleigh, NC 27699-1633

o�oF W q TF9pG
r
i --I
o 11c
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
December 15, 2006 __- ✓erY t - 01- thNVlhAAVA CP%PV`
AND �.. T � _ ."JURCES
5134 oii1AL OFFICE
Mr. David Greene I
Duke Power company LLC d/b/a Duke Energy Carolinas, LLC - Allen
MG03A2 DEC 1 9 200t
Hagers Ferry Rd.
Huntersville, NC 28078-
SUBJECT: Wastewater/Groundwater Laboratory Certification Renewal �',JTY SEM
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,
Pat Donnelly
Branch Manager
Enclosure
cc: Chet Whiting
Mooresville Regional Office
L7
No hCarollna
otra!!�
Laboratory Section 1623 Mail Service Center Raleigh, NC 27699-1623 Phone [phone] Customer Service
Internet: %N%„v.d%«llab.ure Location: 4105 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
OP
Mr,Y 10
w
~i
O
Z11-;
St QUAM V'V'E jr
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
Pat Donnelly
61%

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:
Address: MGO3A2
Hagers Ferry Rd.
Huntersville, NC 28078-
Effective Date:
Expiration Date:
Date of Last Amendment:
5134
01 /01 /2007
12/31 /2007
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
off
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.

6W16-17
` t Michael F. Easley, Governor
William G. Ross Jr., Secretary
<✓ " "r
__ -North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
Mr. Robert Wylie
Duke Power
526 South Church Street
Charlotte, NC 28202
Dear Mr. Wylie:
September 18, 2006
fS'
wtaMM
W Instcr -sale-
Regional C"_
SUBJECT: Acknowledgement of Request for an
Authorization to Construct
Allen Steam Station
Flue Gas Desulfurization
Wastewater Treatment System
NPDES Permit No. NC0004979
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
ly
Cecil . Madden, J ., P.
Construction Grants and Loans
Design Management Unit %
AR/dr
cc: &DW
WQ Central Files
Anita Reed, E.I.
ATC Files
Construction Grants and Loans Section
1633 Mail Service Center Raleigh NC 27699-1633
Phone: [phone] / FAX: [phone] / Internet: www.nccgl.net
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
.rcr I. OF L14V1hxkW&-+*. -s
AND klATI.!^�L RESOURCES
MOORESVIO Lc r GIONAL OFFICE
SEP 2 2 200f,
WATER Q . ALITY SECTIOP
One
No, hCarolina
✓� aturally

Michael F. Easley, Governor
p� William G. Ross Jr., Secretary
> r North Carolina Department of Environment and Natural Resources
O '< Alan W. Klimek, P. E. Director
.AivisiQnv�af��flalitt�...,� 1
Akin - ..A7ljRA RE -SOURCES
September 18, 2006 MOORESV I-1 '-,-"!ONAL OFFICE
Stephen Immel
Allen Steam Station
243 Plant Allen Rd. SEP 2 C 200<,
Belmont, NC 28012
Subject: Notice of Incomplete Discharge Monitoring Report NC0004979 TT� !TV
Dear Permittee: �3A1LY %44 :ii.1 ! d SECTION
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:
Central Files
Nne
Carolina
Narturally
N. C. Division of Water Quality 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Phone: [phone] Customer Service
Intemet: http://h2o.enr.state.nc.us 512 N. Salisbury St. Raleigh, NC 27604 Fax: [phone]
An Equal Opportunity/Affirmative Action Employer

V--
X
ID Notice of Incomplete Discharge Monitoring Report
Permit Number: N C a o4 4-7cl
Facility: Ler-N 5
County: Ct 5f on
DMR Month and Year: 14�� r D
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.
L Other:
IL - �?'Ipl _j
I 'APO
'1A

ODES PERMIT NO. NC0004979 DISCHARGE NO. 002
%CILITY NAME Allen Steam Station
PERATOR IN RESPONSIBLE CHARGE (ORC)
''ERTIFIED LABORATORIES
HECK BOX IF ORC HAS CHANGED
EFFLUENT
MONTH July
CLASS I
Don Scruggs GRADE I
(1) Duke Power Env. Services - 248
PERSON(S) COLLECTING SAMPLES Staff
(1)
YEAR
COUNTY
PHONE
2006
Gaston
704-829-2350
Mail ORIGINAL and ONE COPY b:
NCDENR I DIVISION OF WATER OUALMY
WATER DUALITY SECTION
ATTENTION: CENTRAL FILES
1617 MAIL SERVICE CENTER.
RALEIGH, NC 27699.1617
X
URE OF OPERATOR IN RESPONSIBLE CHAR -) DATE
By this signature, I certify that this report is accurate and complete to the best of my knowledge.
W
Q UUY
IXO
< U
<< g
W
p
O ~
W
W
Z
w
Zy
p
50yd
31616
00310
00"5
01000
01057
00720
01002
01027
FLOW
Cu4
O
,po
O
toVl
g
i
o
Z Z
m
O]
L
u
Z
S
U
Tc
~
O
�•
2
O
<
V
EFF X_
IMF
J uj
O IX
HRS
HRS
YIN
MGD
41100m1
mgA
mgA
ugA
ugA
mgA
ugA
LW
1
0700
9
B
2
0700
9
B
4
0700
9
B
5
0700.
_: 9
Y
_..
-...
-
6
0700
9
Y
<2
<1.7
83 448
288.0
28.0
<0.0020
41.0
1.10
7
0700
9
Y
8
N
9
1
N
to
0700
9
Y
1t
0700
9
Y
12
0700
9
Y
13
0700
9.
Y
14
0700
9
Y
is
0700
9
B
16
0700
9
B
.17
0700
9::
Y
18
0700
9
Y
:19
0700;
-9
Y
20
0700
9
Y
21
0700
9
Y
-
22
0700
9
B
23
'0700
9 '
B
24
0700
9
B
25
0700
9
B
26
0700
9
B
27
:0700
9 -
B .
a
z8
0700
9
B
29
0700
9
8
_.
30
0700
9
B
31
0700
9
Y
Weraoe
1.0
0.0
83.48
288.00
28.0
0
41.0
1.10
-
Aaximum
Q
<11
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)
G
G
G
G 3
G:
G
G.
G
Acinthly Limit
:acility Status: (Please check one of the following) DEM orm
All monitoring data and sampling frequencies meet permit requirements �- Compliant
All monitoring date and sampllno 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
.nfnT.elinn ,nN, .iinn �I,e nr.�eil,ilih. of 4;- -A in,nn�Mmen1 fn. Lnn,.nnn ,nnlatinne may,
t n >
Stephen J. Immel
Permittee (Please print or type) Signature of PVmittee" 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 pernittee, 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'dorm is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facilitys permit for reporting data.

WAT�c�Q
O G
Mr. Michael Ruhe
Duke Energy Corporation
P.O. Box 1006
Mail Code EC11E
Charlotte, North Carolina
Dear Mr. Ruhe:
28201
July 5, 2006
Subject:
Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
`, t.' ' Alan W.141h elk P.E., Director
4101' Division of Water Quality
„t
JUL c
WraA11JPDES"Peer it- vT10N
Permit NC0004979
Allen Steam Station
Gaston County
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 [phone] x 551 or [e-mail].
Sincerely,
Ce oy iel
Western NPDES Program
cc: ,
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] NorthCarolina
512 N. Salisbury Street, Raleigh, North Carolina 27604 On the Internet at http://h2o.enr.state.nc.us/ ,Naturally
An Equal Opportunity/Affirmative Action Employer

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

Duke Energy Corporation
Allen Steam Station
State Grid/Ouad:
G14NE/Belmont
Permitted Flow:
Not limited
Receiving Streams:
Catawba and South Fork Catawba Rivers
Stream Class:
WS-V & B
Drainage Basin:
Catawba River Basin
Sub -Basin:
03-08-34
Latitude (001):
35' 11' 23" N
Longitude (001):
81' 00' 45" W
Latitude (002):
35' 10' 30" N
Longitude (002):
81 ° 00' 23" W
Latitude (002A):
35' 11' 34" N
Longitude (002A):
81 ° 00' 22" W
Latitude (00213):
35' 11' 36" N
Longitude (002B):
81 ° 00' 30" W
Latitude (004):
35' 11' 35" N
Longitude (004):
81 ° 00' 22" W
Latitude (A. Clam):
35' 11' 36" N
Longitude(A. Clam):81 ° 00' 30" W
Asiatic Clam/Debris
r E
Filter Backwash
i _
-,
min
rt
Al�
j; f ,4 '
t 002B
Map not to scale
Facility
ti
Location
North
NPDES Permit No. NCOOO4979
Gaston Count

Permit NC0004979
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfa11001)
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
„
, Avera a
Maximum,
, _Fre_ nenc
Flow
Daily
Pump Logs
Effluent
Temperature
(June 1 — September 30)1
38.9 °C
102 °F
Daily
Grab or
Instantaneous
Effluent
Temperature
(October 1— May 31)1
35 °C
95 °F
Daily
Grab or
Instantaneous
Effluent
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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Location
Flow
Weekly
Instantaneous
or Estimate
Influent or
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 pg/L
2/Month
Grab
Effluent
Total Nitrogen
(NO2 + NO3 + TKN)
Semi-annually
Grab
Effluent
Chronic Toxicity'
Quarterly
Grab
Effluent
pHs
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.
0

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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS'
Monthly
Daily
Maximum ;
Measurement
Frequency
Sample Type
Sample Location
Flow
.Average..
Episodic
Estimate
Effluent'
PH
Episodic
Grab
Effluent
Oil and Grease2
15.0 mg/l
20.0 mg/l
Episodic
Grab
Effluent
Total Suspended Solids2
30.0 mg/1
100.0 mg/l
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.

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
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Fre uenc
Sample Type
Sample Location
Flow
Episodic
Estimate
Effluent'
PH
Episodic
Grab
Effluent
Oil and Greasez
15.0 mg/1
20.0 mg/1
Episodic
Grab
Effluent
Total Suspended Solids2
30.0 mg/1
100.0 mg/l
Episodic
Grab
Effluent
Total Copper3
1 1.0 mg/l
Episodic
Grab
Effluent
Total Irons
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.
2

Permit NC0004979
A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfa11003)
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 (Outfa11004)
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 " 'LI.
CHARACTERISTICS
�Average.
Flow
Oil and Grease 15.0 mg/1
ITS MON1"
Daily Measurement
Maximum Frequency
Weekly
20.0 mg/1 Quarterly
Sample Type
Estimate
Grab
Sample Location
Effluent
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 Perrrdttee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
I Maximum
Measurement
Fre uenc
Sample
—Type
Sample
Location'
Flow
Monitor & Report
Monthly
Pump logs or
similar
readings
Effluent
Total Suspended Solids
Monitor & Report
Weekly
Grab
Effluent
Carbonaceous Oxygen Demand
(COD)
Total Arsenic
Monitor & Report
Monitor & Report
Weekly
Weekly
Grab
Grab
Effluent
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.

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, auarterly 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 H 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.
6

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
Far li Iri oMolibin
(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 Characferistics
(1.) Receiving Stream:
Catawba /
South Fork
Catawba Rivers
(7.) Drainage Area (mi2):
??/635
(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 lig/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 pg/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
Page 2
Duke Power/ Allen Steam Station
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 Desulf irization 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
Page 3
Duke Power/ Allen Steam Station
NC0004979
Flue Gas Desulfurization Wastewater Characteristics
Potential
Parameters of
Concern
Projected
Average
concentrations
in FGD
wastewater
( )
Projected
Concentrations
after WWTS
(11910
Projected
Average
Concentrations
at Outfall 002
(11910
Applicable
Water
Quality
Standards
(Kglu
Antimony
0.02
0.01
0.01
5.6E
Arsenic
0.28
<0.14
0.14
loc
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
15.0A
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 OF
95 OF
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 0 Chloride 0 Silver
• Arsenic 0 Mercury 0 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
Page 4
Duke Power/ Allen Steam Station
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 [phone], 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:
�,,(c O cj= t //0 C`tcy✓%f %6 i71,%F
Regional Recommendation by:
Signature ID. Date
Reviewed and accepted by:
Regional Supervisor:
Signature Date
NPDES Unit Supervisor:
Signature Date

C� WAT F9p�
Michael F. Easley, Governor
y William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P. E. Director
JDivisioinpf Water Quality
Date March 21, 2006 F77��`` ,-JRCES
h1OOR"IL OFFICE
r I
Don Scruggs
Allen Steam Station
PO Box 1006 (EC 1 l X)
Charlotte, NC 28201-1006
MAR 2 Z 2004)
Subject: Notice of Incomplete Discharge Monitoring Report NC0004979 Von —
A TER
���L1TY SECTION
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 stair'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: mmans
Central Files
No Carolina
Naturally
N. C. Division of Water Quality 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Phone: [phone] Customer Service
Internet httpl/h2o.enr.sfate.nc.us 512 N. Salisbury St. Raleigh, NC 27604 Fax: [phone]
An Equal Opportunity/Affirmative Action Employer

Notice of Incomplete Discharge Monitoring Report
70
Permit Numbe
r:
Facility:
County: _ C-NA c[V n
DMR Month and Year: C�wk- �-� 6
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.
t
❑ The DMR Parameter Codes have been omitted.
Other:
rz� C�v)L-)
d�

PDuke
Power,
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:
PROCUREMENT, CONSTRUCTION AND EH&S
Duke Power
526 South Church St.
Charlotte, NC 28202
Mailing Address:
EC13K / P. 0. Box 1006
Charlotte, NC 28201
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.dukepower.com

Duke
Power ,
February 8, 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:
PROCUREMENT. CONSTRUCTION AND EH&S
Duke Power
526 South Church St.
Charlotte, NC 28202
Mailing Address:
EC13K / P. 0. Box 1006
Charlotte, NC 28201
With reference to Part H, 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,
Mar . Hays, General Manager
Environment, Health and Safety
www.dukepower.com

ON 1NJEC1IUN TENTS]
Subject: Re: [Fwd: CARBON INJECTION TESTS]
From: Richard Bridgeman <[e-mail]>
Date: Fri, 04 Mar 2005 10:11:47 -0500
To: Rex Gleason <[e-mail]>
CC: Michael Parker <MichaeLParker@lcmaiLnet>
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

W"IBION INJECTION TESTS]
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 9:46 AM

Duke
P F"'_
rrkPower®
October 26, 2005
Ms. Coleen Sullins
Permits and Engineering Unit
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:
WILLIAM F. HALL, ///
Group Vice President
Fossil -Hydro Generation
Duke Power
EC11 P / 526 South Church Street
Charlotte, NC 28202-1802
704 382 3940
704 382 9840 fax
wfhall2@duke-energy. com
RECEIVED
OCT 3 12005
NC DEPT. OF ENVIIRONMENT
AND NATURAL RESOURCES
MOORESVILLE REGIONAL OFFICE
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,
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.com

Permits Currently Held:
II�i1,p004979
Belews Creek Steam Station - NC0024406
Belews Creek Steam Station - W00005873
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

December 15, 2004
5134
Ms. Penny Franklin
Duke Energy Allen Steam Station
MG03A2
Hagers Ferry Rd.
Huntersville, NC 28078-
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
NG [DEFT. OF ENVIRONMENT
AhIO �'",'?'- n' " OURCES
fficci OFFICr
SUBJECT: Wastewater/Groundwater Laboratory Certification Renewal
FIELD PARAMETERS ONLY
Dear Ms. Franklin:
DEC 1 6 200A
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. Meyer
Laboratory Section
Enclosure
cc: Chet Whiting
Mooresville Regional Office
Nor`thCarolina
Naturally
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
t6 10 rns V
10
J" >'
"FUL 12.1771,
DUKE ENERGY ALLEN STEAM STATION
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, 2005
Certificate No. 5134 WMeyer
James W. 0��'�

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 21-1.0800, is hereby certified for the measurement of the parameters listed below.
CERTIFIED PARAMETERS
INORGANICS
:)H
Std Method 4500 H B
TEMPERATURE
Sid 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.

C� �G
_co 1
D Y
October 1, 2004
Mr. Michael Ruhe, Manager Water Protection
Duke Energy Corporation
PO Box 1006 (EC 11E)
Charlotte, North Carolina 28201-1006
Dear Mr. Ruhe:
\tc: aci F. Ic rie ,c
\i'ilitam v Ktiss Jr.. %CcrrL
North Camlinu Dcranment of Environment and Natunll R=ur
Alan W. I:hmcl,. 1'. E Direc
Division or'Water Qual
Coleert K. Sullins. Derut� Dtrcc
Division ofwalcr Dual
Subject: Compliance Biomonitoring Inspection
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County, NC
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 [phone].
Sincerely,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
JL
One
NoorthCaroIina
N. C. Division of Wats Quality, Mooresville Regional OE=, 919 Nona Main Street Mooresville NC 28115 (70 :) 6fi:r16-59
NCDEN
Cuszomcr Servic
1-E77-623-6748

United States Environmental Protection Agency, Washington, DC 20460
NPDES Compliance Inspection Report ©?A
North Carolina Department of Environment and Natural Resources NC
Division of Water Quality, Mooresville Regional Office
Form Approved
OMB No. 2040-0003
Approval Expires
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:
Permit Expiration Date:
off Highway 273, south of Belmont
12:00 pm
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)
Charlotte, North Carolina 28201-1006
Phone No.
704-373-3231
Contacted.?
No
Section C:
Areas Evaluated During Inspection
• Permit ® Flow Measurement ® Operations & Maintenance El 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 Insper,'
Agency/Office/Telephone:
Date:
John Lesle'(Z
DENR-DWQ/MRO/[phone] FAX: [phone]
October 1, 2004
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

PVDuke 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.

Duke 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.

Or
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.

F W A Michael F. Easley
TF Governor
NCDENR William G. Ross, Jr., Secretary
> r_ North Carolina Department of Environment and Natural Resources
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 NCO004979
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 $25,000 per day.
If all wastewater discharge has ceased at your facility and you wish to rescind this permit, contact me at the telephone
number or address listed below. You may also contact the Mooresville Regional Office at [phone] to begin the rescission
process.
Use the enclosed checklist to complete your renewal package. The checklist identifies the items you must submit with
the permit renewal application. If you have any questions, please contact me at the telephone number or e-mail address listed
below.
Sincerely,
Charles H- Weaver, Jr.
NPDES Unit
cc: Central Files
WooresvMe Regkm 0ffice,:Water Quality Sac%W,
NPDES File
OWC [1k F'f OF ENVIPONMEIVT
ANo tort 1JR,6( RrSC"4rRCE$ 1
SC
_FFICE
SEP 1 a 2004
WAIER ,�.11 Y SE( a. &
14
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083, extension 511 (fax) 919 733-0719
VISIT us ON THE INTERNE @ http://h2o.enr.state.nc.us/NPDES e-mail: [e-mail]

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.1Lb 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 my 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 shove requirement does NOT apply to privately owned facilities treating 100%
domestic waste water, or facilities which discharge non process waste water (cooling
water, frlterhackwash, 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

file:///Untitled
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

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P. E. Director
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
December 30, 2003
SS
5134
Mr. Paul Fitzgerald
Duke Energy Cliffside Steam Station
MG03A2
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,
James W. Meyer
Laboratory Section
Enclosure
cc: Chester E. Whiting
Mooresville Regional Office
2 TA
NCDENR
N. C. Division of Water Quality Laboratory Section 1623 Mail Service Center Raleigh, North Carolina 27699-1623 [phone]
FAX: [phone]

rpv
LABORATORY NAME:
ADDRESS:
CERTIFICATE NUMBER:
DATE OF INSPECTION:
TYPE OF INSPECTION:
EVALUATOR:
LOCAL PERSON(S) CONTACT:
I. INTRODUCTION:
On -Site Inspection Report
Duke Power Allen Steam Station
Duke Power Company Mail Code: MG03A2
13339 Hager's Ferry Road
Huntersville, NC 28078-7929
5134
November 20, 2003
Field Parameter (Maintenance)
Chet Whiting
Mr. Paul Fitzgerald, Mr. Don Scruggs
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.
Ill. 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.
w
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."

FFV
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 0.10. 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

Puke
Power®
A Duke Energy Company
November 12, 2003
Ms. Sonja Williams
Allen Steam Station
253 Plant Allen Rd.
Belmont, NC 28012
Mooresville Regional Office
North Carolina Department of Environment and Natural Resources
919 North Main Street
Mooresville, NC 28115
Subject: Duke Power Company
Plant Allen
6—ASTot f 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`" 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,
C/ 4-7tal ecK-e4��
Donald L. Scruggs
Environmental Coordinator
AND NATURAL RESOURCE* `
VILLE R..c'G04& OFF
Pit
NOV 17 2001
NTH QUALITY SECTION
com

A Michael F. Easley, Governor
William G. Ross Jr., Secretary
tiC North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
> J
Division of Water Quality
� �.:wr:.a y
11 /6/03
NC DEP t .AND c� ���•:.
s ;ax)NAL OFFICE
Michael A. Ruhe YORt'°�
Duke Energy Corporation
P.O. Box 1006
3 2003
Charlotte, NC 282011006 NOV 1
SUBJECT: Payment Acknowledgment
Civil Penalty Assessment
Plant Allen Steam Station WATER WALITY SECTION
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 (919) 733 — 5083 ext 547.
Sincerely,
/W'4� C.
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
® Power®
A Duke Energy Company
October 30, 2003
FOSSIL -HYDRO GENERATION
Duke Power
EC11E / 526 South Church Street
Charlotte, NC 28202-1802
NC DEPT. OF ENVIRONMEN!
AND NATURAL RESWRCES
WORESVILLr !r-0IONAL OFFIt,U'
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 WATERf 0% 1T y SkR ; ION
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,
14,-A -I �(Z,//"
Michael A. Ruhe, Manager
Environmental Support
C: Rex Gleason - Mooresville Regional Office (NCDENR)
www.duke-energy.com

DDuke Power Gen - Support Groups Wachovia, N.A.
'Energy Duke Energy Corporation
Ene 422 South Church Street Greenville, SC
PB03B / 422 S. Church Street Charlotte, NC 28237
P.O. Box 1244
Charlotte, NC 28201-1244
67-1/532
Date 10/29/2003
Pay
To The
Order of
Three hundred thirty five and 041100 Dollars
DEPT OF ENVIRONMENT & NATURAL RESOURCES
POINT SOURCE COMPLIANCE/ENFORCEMENT
DIV OF WATER QUALITY - 1617 MAIL SE
Raleigh,NC 27699-1617

N46
�OF W T�RQ Michael F. Easlev, Go a or
\� G William G. Ross Jr., Secretary
CII) y North Carolina Department of Environment and Natural Resources
r
Alan W. Klimek, P. E., Director
p Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
October 7, 2003
CERTIFIED MAIL 1CAD 1 D510 bOOV
RETURN RECEIPT REQUESTED
Mr. Michael A. Ruhe, Water Compliance Manager
Duke Energy Corporation
P.O. Box 1006 (EC 11 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:
Mooresville Regional Office. 919 North Main Street, Mooresville, North Carolina 28115
Phone [phone] Customer Service
Fax [phone]

$ 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
$ 85.04
$ 335.04
TOTAL CIVIL PENALTY
Enforcement costs.
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

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. 14313-
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 applyin for or a Special Order by Consent. If you have any questions
about this civil Qenalty assessment or a Special Order by Consent please contact the Water
Quality Section staff of the Mooresville Regional Office at 704/663-1699.

Dc --7-Z 3
(Date)
ATTACHMENTS
D. Rex GlelKon, P.E.
Water Quality Regional Supervisor
Mooresville Regional Office
Division of Water Quality
cc: Water Quality Regional Supervisor w/ attachments
Compliance/Enforcement File w/ attachments
Central Files w/ attachments
' IC

Limit Violations, July 2003
Attachment A
Duke Energy Corporation
Plant Allen Steam Station
NPDES Permit No. NC0004979
Case Number LV-2003-0641
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 ) ADN41MSTRATIVE 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
F..V0T11tUWK.
TELEPHONE
2003

JUSTIFICATION FOR REMISSION REQUEST
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. R. 1 d 2F2_7R7 I fC) remyggtnn of a civil penalty may i,e -ranted
only when one or more of the following five factors applies. Please check each factor that you
believe applies to y ol.r case and provide a detained explanation ine-ImALng copses of s'lpport:.ng
documents, as to why the factor applies (attach additional pages as needed).
(a'1 one �r more o
\f the rixnl nenaith7 assessment f tetnrs ;n N.C.G C 143B-282 1(b)
=Y
were wrongfully applied to the detriment of the petitioner (the assessment factors are
listed in the civil penalty assessment document);
(hl tha •nnlatnr nrmm�tl�� abated continiiffig ew Arnnmantal ��marry reswitiria From the
violation (i.e., explain the steps that you took to correct the violation and prevent future
occurrences);
(�) the violation Nvas inadvertent or a result of an accident (i v ornlnin whir thn
vinlation ivas ummoidably or somethi»o You could not'rrevent nr p rop are f nr),
(d) the violator hari not }men accessed civil penalties fir ally previous vinlatinns;
(el naumant nfthe ciy" 1 Mpglty vxili prevent Y natJmnant for the rema„irLing nec—enr��
`'
remerlini al`tionQ (i_p_ ,Ynlain how pm; mPnt nf•the civil pennlh) Will pTPVOnt �lnt/ frnm
narfnrmino thv nrtivitivs nvrPvvnry to nrhiove rmmnlinnrol
FXPI ANATION•

EFFLUENT
eERM1T NO N0000497E DISCHARGE NC. 002 MONTH July
NAME Allen Steam Station CLASS I
gATOR IN RESPONSIBLE CHARGE (ORC; Don Scruggs GRADE I
;T =tED LABORATORIES (1) Duke Power Env. Services - 246 (2)
HECK BOX IF ORC HAS CHANGED F7 PERSON(S) COLLECTING SAMPLES Staff
Ma:i ORIGINAL and ONE COPY to
ATTN CENTRAL FILES X
DIVISION
ON OF WATER QUALM Lf � C/�-f'✓'�/[ l�tis- L/Z�
DEHNR (SIGNATIRKc�OPERATOR IN RESPONSIBLE CHARGE) r
P O BOX 29535
6v this signature. I certify that this report is accurate and complete to the best of my knowleooe.
YEAP. 2003
COUNTY Gaston
PHONE [phone]
DATE
< a I
w
tr ^-
< _
w
w`
O in
< Z
IL
w I
O
--- soon
0043C 1
W656
oo5x 1
v.r-
a 6w-
o1o.:
moa5 I
o,od.
0,,.-
1 0066r
MGM
TGos1
otoo.
Flow
in
c
o
O
_cl
E
d
t
N
Z
=
=
E
o
t
[r X
IN%
O C
HRS 1
HRS
YIN
MDD
I SU
rrW
mryl
ug,l 1
ug9
moll
mg'I
uan
ual
mot
1 mg9
P/F
1 mWI
71 6700
9
Y
25.5
7.0
<5.0
8.0
<10.0
<10.0
<0.006
0.07
14.2
23.1
<0.010
0.72
< 0.04
2I 0700 1
9
Y
I
31 0700
1 9 1
Y
1 41 0700 1
9 1
B
5 0700
1 9
1 B
! 51 0700
9
1 B
1
(
1
i 1 0700
9
Y
1
5. 0700
! 9
Y
!
9 0700
9
Y
8.6
1 :oI 0700
1 9
Y
23.9
7.7
1
1
++� 0700
9
Y
°.5
1
I 2! 1300
1 2
Y
!
9.3
p 1
1
1
1
1
1
+31 0700
9
1 Y
8.3
1 ,4! 0700
9
Y
:51 0700
9
Y
25.2
7.3
1
0.004
40.4 11
P
15; 0700
9
Y
8.4
1
Z
1
1
1
171 0700
9
Y
I 1E1 0700 i 9
Y
!
1
1
1
1
I
t31 0700 9
Y
c01 0700
1 9
Y
1
1
210700
1 9
Y
! :2I 0700
1 9
Y
0.7
1
I
23 0700
9
1 Y
241 0700
1 9
1 B
1
1
1
1
:e1 0700
9
8
1 251 070D
1 9
1 8
1
1
1
1
1
27 0700
1 9
B
I
1 2!1 0700
1 9
1 B
1
1
1
1
:91 0700
1 9
1 B
0.7
3:1 0700
1 9
1 Y
311 0700
1 9
1 Y
1
1Averaae
1 15.2
0.0
8.0
0.0
0.0
1 0.002
0.07
14.2
31.8
1 0.000
1
0.00
IMaxlmum
25.5
9.3
<5.0
8.0
<10.0
<10-0
<0.006
0.07
14.2
40.4
<0.010
L0.72
<0.04
IMinimum
0.7
7.0
<5.0
8.0
<10.0
<10.0
0.004
0.07
14.2
23.1
<0.010
< 0.04
IComc. (C) / Grab (G)
G
G
G
G
G
G
G
G
G
G
G
1 G G
Montnly Limit
6.0 - 9.0
15.0
30.0
-
-
-
-
I -
-
-
1 16 -
am:tty Staves. (Please cnecu one of the following)
UtM Norm MH-1 (tlltda)
All mcnitoring data and sampling frequencies meet permit requirements Compliant.
AJ monitoring data and sampling frequencies do NOT meet permit requirements Noncommar.: See Attainment S E L L' 0v�
"I certifyunoer 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 alrectly responsible for gathering
:ne Information. the information submitted is. to the pest cf my knowledge and bei;ef true, accurate. and complete. I am aware trial there are slondlcant penalties for submitting false
Information. including the possibility of fines and imprisonment for knowing violations."
A c
Ni;cnael A. Rune �rl a�.o /✓-�
Pennines (Please print or type) Signature of Pernittee- Date
p C Box 1006 (EC11E) Charlotte. NC 28201.-1006 704-373-3231 05/312005
"er :ttee Address Phone Number Permit Exo. Date
"ORC must visit facility and document visitation of facility as required per 15A NCAC 8A .0202 (b) (5) (B)
S-sled by other than the perminee. delegation of sionatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(D)_
Systems Operating
Tne mom;nly average for fecal coliform Is to be reported as a GEOMETRIC mean Use only units designated in the reporting facility's permit for reporting aam

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
Averse
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Location
Weekly I
Instantaneous or
estimate
Influent or Effluent
Flow
15.0 mall
30.0 mall
20.0 mall
100.0 mall
Quarterly
Monthl
Quarterly
Grab
Grab
Grab
Effluent
Effluent
Effluent
Oil and Grease
Total Suspended Solids
Biological Oxygen Demand (BODs),
20OC2
Quarterl
Grab
Effluent
Fecal Coliform
1.0 mall
2/Month
Grab
Effluent
Total Co ere
1.58 moll
Monthl
Grab
Effluent
Total Iron2
Monthl
Grab
Effluent
Total Arseni c2
31.0 all
2/Month
Grab
Effluent
Total Selenic2
Semi-annual)
Grab
Effluent
Total Phosohorus
Semi-ann ially
Quarterl
Grab
Grab
Effluent
Effluent
Total Nitrooen (NO2 + NO3 + TKN)
Chronic Toxicity'
Quarterl
Grab
Effluent
Total Chromium2
Quarterly
I Grab
Effluent
Phenol3
Quarterl
Grab
Effluent
NaohthalgnO
Quarterly
Grab
Effluent
Sulfate
Quarterl
Grab
Effluent
Total Barium2
Quarterl
Grab
Effluent
Total Nickell
Quarter
Grab
Effluent
Cyanide
Quarterl
Grab
Effluent
Total Zinc2
�
Quarterl
� Grab
Effluent
Tots! Cadmium2
Tot
Monthly
Grab
Effluent
Notes:
1. Whole Effluent Toxicity shall be monitored by chronic toxicity (Ceriodaphrua) 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.
19

cav
�0F WA TFR p Michael F. Easley, G vemor
William G. Ross, Jr., Secretary
�O G Department of Environment and Natural Resources
� r 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.
.-"
NCDENR
Customer Service
1 877 623-6748
Division of Water Quality 919 North Main Street Mooresville, NC 28115 Phone [phone]
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,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Cc: Dave Goodrich
Kevin Bowden
/mlp
h\gen\pilotstdy 102803.doc

WVP Duke
Power®
A Duke Energy Company
October 27, 2003
Mr. Rex Gleason
Water Quality Supervisor
North Carolina Department of
Natural Resources
919 North Main Street
Mooresville, NC 28115
-. 1. . ,%,1'4;;;T
Subject: Allen Steam Station
NPDES Permit NC0004979
Pilot Test for Selenium Reduction
Dear Mr. Gleason:
FOSSIL -HYDRO GENERATION
Duke Power
EC11E / 526 South Church Street
Charlotte, NC 28202-1802
1C DEPT. O ENORONMENT
AND NATUR& RESOURCES
NVORESVo, _ ',,MAL OFFICE
r
OCT 2 8 2003
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,
�k t,�� Cn (Z-",�
Michael A. Ruhe, Manager
Environmental Support
Attachments
cc: Mr. David Goodrich, NCDENR - Raleigh
www.duke-energy.com

e
FOSSIL -HYDRO GENERATION
='D'EPT. of 11.14ME r
AND NATUR )URCES
11110ORESvI' '-'FFICt
September 18, 2003
Mr. Rex Gleason
Mooresville Regional Office
North Carolina Department of Environment and Natural Resources
919 North Main Street
Mooresville, NC 28115
Subject: Duke Power Company
Plant Allen Stream Station
Go -,ton County
NPDES Permit Number NC0004979
Dear Mr. Gleason:
SEP 2 2 2001
YATE�QUA
:
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
sPleniurn heina released from solids (fivash)_ 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,
PGVIIAVt 1� r(/111111[t-
Michael A. Ruhe, Manager
Environmental Support
www.duke-energy.com

Michael F. Easley, Governor
William G. Ross Jr.. Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P. E., Director
i 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 [phone].
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]

United States Environmental Protection Agencv, Washington , DC 20460
NPDES Compliance Inspection Report
North Carolina Department of Environment and Natural Resources
Division of Water Quality, Mooresville Regional Office
Ak7zMXj
NCDENR
Form Approved
OMB No. 2040-0003
Approval Expires
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:
Duke Power Allen Steam Station
1 1:05
Exit Time:
July 1, 2002
off Highway 273, south of Belmont
Gaston County, North Carolina
12:10
Date:
Permit Expiration 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
PO Box 1006 (EC I 1 E)
Charlotte, North Carolina 28201-1006
Phone No.
701-373-3231
CTontacted?
No
Section C:
Areas Evaluated During Inspection
Permit ® Flow Measurement ®O erations & Maintenance
p ❑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 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
— � rvui1 »vvv kixcviseu 3-63J 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.
Outfa11002:
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

;r Allen Steam Station
rmit No. NC0004979
. 5...,
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.

ium Treatm... earn Station Ash Basin Discharge 002
IPSu7bject:pdate 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 IN
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

\opt • _ _ • iRQG
Y
� r
O `C
August 5, 2002
Mr. Michael Rhue, Manager Water Protection
Duke Energy Corporation
13339 Hagers Ferry Road (MG03A5)
Huntersville, North Carolina 28078-7929
Dear Mr. Rhue:
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
�-� latur'l
Subject: Compliance Biomonitoring Inspection
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County, NC
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 [phone].
Sincerely,
R, 'v'`c r X /,-)-
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
JL
N. C. Division of Water Quality 919 North Main Street, Mooresville NC 28115 Phone [phone]
FAX [phone]
4CDEN€t

United States Environmental Protection Agency, Washington, DC 20460
�T A NPDES Compliance Inspection Report ©L
North Carolina Department of Environment and Natural Resources �r
Division of Water Quality, Mooresville Regional Office NCDENR
Form Approved
OMB No. 2040-0003
Approval Expires
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 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 Titles) 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.
Phone No.
Contacted?
13339 Hagers Ferry Road
Huntersville, North Carolina 28078-7929
No
Section C:
Areas Evaluated During Inspection
Permit ® Flow Measurement ® Operations & Maintenance El 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 Inspector(s
Agency/Office/Telephone:
Date:
John Lesley s3
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

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 renewedpermit)
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.

V
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.

Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
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:
Alan W. Klimek, P.E. Director
Division of Water Quality
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.
A&A
NM NR
Customer Service
1 800 623-7748
Division of Water Quality 919 North Main Street Mooresville, NC 28115 Phone [phone]
Fax [phone]

I
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,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Cc: Dave Goodrich
Kevin Bowden
/mlp
h\gen\pilotstdy.doc

Duke
Power©
A Duke Energy Company
July 22, 2003
Mr. Rex Gleason
Water Quality Supervisor
North Carolina Department of
Natural Resources
919 North Main Street
Mooresville, NC 28115
Subject: Allen Steam Station
NPDES Permit NC0004979
Pilot Test for Selenium Reduction
Dear Mr. Gleason:
FOSSIL -HYDRO GENERATION
Duke Power
EC11E / 526 South Church Street
Charlotte, NC 28202-1802
otM- OF E IAROM
XVNATUPAi< �4ESWRCE8
JUL 2 3 2003
WATEP QUALITY SEMOH
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 [phone].
Sincerely,
Michael A. Ruhe, Manager
Environmental Support
Attachments
cc: Mr. David Goodrich, NCDENR - Raleigh
www. duke -energy. com

Old
Ash
Tower
Pump
to Old
Ash
Basin
Vegetated
Deltas
(Drainage
area of 65
acres)
Yard
Sumps
Vegetated
Ash Delta
ALLEN STEAM STATION
ASH BASIN
Pump from Ash Delta to Tower
Add FeSO4
�l
Vegetated Ash Berm
Units 4 & 5
Ash Sluice
Tower
••......• .....r
. ........ .
Vegetated
Ash Delta
•
Units 1, 2, &
3 Ash Sluice /

b7/21/03 MON 16:07 FAX [phone] ALLEN ADMIN OFF
t 425) 8£3q-4100 7 / 2 1.. / 7003 11 : 39 )SAGE 1/5 Rifilzi Fax
Material Safety Data Sheet **
Univ=r USA Inc.
6100 CriflllOit Point
Kirkland, WA 08033 � /
USA Un' YAR
Www.univarus.i.ram
Date 07/21 /03
To DUKE ENCfiGY coRr
Attu. ROBIN JOLLY
Fax [phone]
Front MARSHALL GONE at UNIVAR USA
fax direct
Total page9 (ind, this one) 5
subiact I your rofetrnco MSDS - FERRIC SULFATE 50%
1 -ma l direct telephone dirrct Khidwtd, WA 08033
A
For emergency assistance involving chemicals, call CHEMTREC - [phone]
** Material Safety Data Sheet **
•:I
0001

y •07/21/03 MON 16:07 FAX [phone] ALLEN ADMIN OFF
' k �.......— �vv • " C. -I -- ,a,t ..sa L Herr G/ � 1SlSh'tFBX
006 09/14/00 FERRIC SULFATE 50%
PRODUCT NAME: F'E-3 - FERRIC SULFATE 50%
MSDS#: P16973V'S
DATA; 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 [phone] .
Emergency Telephone No_ [phone]
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)
TI_ EAZARDOUS 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 71.455
Vapor Pressure: NA
Vapor Density (Air=l): 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
121002
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 surfur trioxide.
Unusual Fire & Explosion Hazard: None known_
V_ HEALTH HAZARD INFORMATION
Y

07/21/03 MON 16:07 FAX [phone] ALLEN ADNIN OFF 1@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 ClassifioatioV:•Primary dermal irritation index a 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 OVZREXPOSURE:
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.
INHAT_ATION 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:

y
• 07/21/03 MON 16:08 FAX [phone] ALLEN ADMIN OFF 0 004
None normally. At temperatures above 600 deg C, sulfur trioxide may be
released.
CONDITIONS CONTRIBUTING TO HAZARDOUS POLYMERIZATION:
None known. r
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 MON 16:08 FAX [phone] ALLEN ADMIN OFF
:. FDA.
USDA:
10 005
CPSC:
TSCA: Is thie 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 SOURS, 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 FROM 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 RISKS 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 THE PRODUCT DESIGNATED HEREIN, AND DOES NOT
RELATE TO ITS USE IN COMBINATION WITH ANY OTHER MATERIAL OR IN ANY OTHER
PROCESS.
* * * E N D 0 F M S D S * * *

rm^
Date.
I e .S-
N�.����'
lmessac -,
919 North Main Street
Mooresville.. North Carolina 2511 Z)
phone; 704/063-16°9
Fax; 704/6n:-6040
ro_ n_X ,� aS�
_
Div/S=C:Iion-WQ
Number o► FFc-- (Inc:. cvr) —
N 0 #
9
"SZ10
9S:VLIVZ
IVW80N
OV96Z99VOL
a�oN
}jnsaa
aged
awil
jae}s
apow
aagwnN auoyd/xed
9S:VL EOOZ Vz Inf
,C,k :1-a Odea -=�uoO 1- 1 wsuea 1 AK,4K
OV09E99VOL:Xe3
I'd
OaW UN303N

Puke
ower®
A Duke Energy Company
February 13, 2003
Mr. Rex Gleason
Water Quality Regional Supervisor
North Carolina Department of
Environment and Natural Resources
Mooresville Regional Office
919 North Main Street
Mooresville, NC 28115
Subject: Additional sanitary input
to existing treatment facility
Allen Steam Station
NPDES Permit No. NC0004979
Gaston County, NC
Dear Mr. Gleason:
Allen Steam Station
253 Plant Allen Rd.
Belmont, NC 28012
FEB 1 4 2003
VM ( `ee, wreeeee e
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,
0/ 01--� g-C-U�
Donald L. Scruggs
Environmental Coordinator
cc: Mike Parker- NCDENR- Mooresville Regional Office

�G
Michael F. Easley, Governor
r—
William G. Ross, Jr.,Secretary
North Carolina Department of Environment and Natural Resources
'
Alan W. Klimek, P.E., Director
Division of Water Quality
April 9, 2003
Mr. Michael A. Ruhe
Duke Energy Corporation
P.O. Box 1006 (EC 11E)
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 -', -'u02, was intended to be as in 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,
R
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
cc: Point Source Compliance/Enforcement Unit
H:lwordlletterslDuke-Plant Allen.NOV Rescission.doc
WKY
NCDENR
Mooresville Regional Office, 919 North Main Street, Mooresville, NC-28115
PHONE [phone] Customer Service
FAX [phone].623-7748
MIA . � .., �{45 +S 1 j L.
.' ,'.fic'�' '.�ct

Duke
Power
A Duke Energy Company
March 21, 2003
FOSSIL AND HYDRO GENERATION
Duke Power
t P.O. Box 1006
\,�� Charlotte, NC 28201-1006
Mr. Richard Bridgeman
North Carolina Department of Environment and Natural Resources i�i.i;cri. OF ENWFtuwhiv
Mooresville Regional Office AND NATURAL RESOURCES
919 North Main Street WORES LIP";:GIONALOFFICE
Mooresville, NC 28115 r �
Subject: Notice of Violation — Effluent Limitations MAR 2 4 2003
Duke Power Company
Plant Allen Steam Station
NPDES Permit No. NC0004979
Gaston County WATER ° fa;A .1T'SFGT1nP
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 350C (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,
Michael A. Ruhe, Manager
Environmental, Health and Safety
Fossil -Hydro Generation
cc: Natalie Sierra — NCDENR — Raleigh, NC
www. duke -energy. com

PP1;dV
Duke
Power®
A Duke Energy Company
April 29, 2003
Ms. Natalie Sierra
NC Dept of Environment and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: NPDES Permit Thermal Modification
Allen Steam Station - NC0004979
Gaston County
Dear Ms. Sierra:
FOSSIL AND HYDRO GENERATION
Duke Power
P.O. Box 1006
Charlotte, NC 28201-1006
NC DEPT. c, a .t, 4tKT
AND NATWAL RESOIICES
HOOKS" 1E REGUM oMM
PFr%�-V,tfV,`E9
MAY 0 7 2003
WATER Q IA��'�' �c,"TnN
Duke Power requests a modification to the effluent thermal limit for Outfall 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
350C (950F) during the period October 1-May 31 and 38.90C (1020F) during the period June 1-
September 30." Duke Power request, the table on limitation page A.(1.) be changed to the following:
Flow Daily Pump Los Effluent
Temperature Grab or
June 1 - September 30 38.90C 1020E Daily Instantaneous Effluent
Temperature Grab or
October 1 - May 31 350C (950F) 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,
�k 41,,�_ 0,
Michael A. Ruhe, Manager
Environmental Support
cc: Richard Bridgeman — Mooresville Regional Office
www.duke-energy.com

r
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
09

r03 14:11 TV04 382 6240
p�l P
duke
dw?Energy.
DPCO ENV ENGR
TF_CHNICAL SF.RVICF_.S
P_O- Brix 1006
Charlotte, NC 28201-1006
Date:
To: A JA e A 14 ni rZ, . _ Fax: 7a'Y -
From: �y�kz A043e— Phone:/6'f 39,� 3�7
Re:
cc
❑ Urgent
❑ For Review
Pages (including cover):
❑ Please Comment
Notes: Aj-4A
/Ua
Z001
❑ Please Reply

A. (). EFFLUENT LIMITATIONS ARID MONITORING REQUIREMENTS FINAL
Permit No, NC0004979
During the period beginning on the effective date of the permit and lasting until expiration, the PenT ittee is authorized to discharge from
outfall(s) serial number 001, Such discharges shall be limited and monitored by the permittee as specified below.
Effluent Characterlatica Discharge Limitations
Lba/day Units (specify)
Mon. Avg. Dally Max Mtn, AM Dglly Max.
Flow
Temperature"' •
* Sample locations; E - Effluent.
Monitorinc Requirements
Measurement Sample 'Sample
Frequency Ivoe Location
Daily Pump Logs or E
Daily Grab E
** Temperature shall not exceed 35 °C (95 OF) during the period October l through May 31 and 38.9 °C (102.0 °F) during the period June 1
through September 30.
*** The Regional Administrator has deternnined pursuant to Section 316(a) of the Act that the thermal component of the discharge assures the
protection and propagation of a balrinced, 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 wager, a permit modification most be requested and received prior to commencing chlorination.

/03 14:12 la704 382 6240
State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A_ Preston Howard, Jr., P.E., Director
Mr. John Carter, Technical Systems, Manager
Duke Power Company
Electric System Support Department
13339 Hagers Ferry Road
Huntersvi.ile, North Carolina 28078-7929
Tear Mr. Csuii.-r
DPCO ENV ENGR Z 002
ffl�.'�VA
I'T a
A&4
�EHNF�
August 11, 1995 Dllrl')4,.i�T,1
F. L
D,,; r
Subject. NPDES Permit Modification Ej COP)/
NPDES Permit No. NC0004%79
Duke Power Company
A1lcn Steam Station E RuI;TE
Gaston County
In accordance with your permit modification application received *on July 26, 1994, we are forwarding bercwitb the
modified subject state - NPDES peiaut. You requested that outfall 001 be subject to a monthly average thcrmxl limit as had
been included in previous permit-\ iratead of the daily average thermal Limit included in the permit issued March 9, 1995, We
have evaluated your request and concirr that a monthly average thermal limit is apprupriatc,
Please find enclosed amended outfail 001 effluent limit;itioric and monitoring requirements page which should be inserted
into your permit. The old rage should be discarded. All other terms and coii&tlons contained in the urioival perinit remain
unchanged and in full effect. Thee permit modifications arc issued punaiant 0. We requirements of North Carolina General
Statutes 143-215.1 and the Memorandum of Agreement between North Caml1na and the U. S. Environmental Prutectiuu
Agency.
If any of the modified pacts, measurement frequencies or sampling requirements 1, pontained in this penrut are unacceptable
to you, you have the right to an adjudicatory hearing upon written request within tQirry (30) days following receipt of this
letter. Thib request trust 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, Noah Carolina 27611-
7447. Unless such demand is made, this decision shall be final and binding.
If you have any quesduus cut wading these permit modifications, please contact Dana Bolden at telephone number
919/733-5083, extension 518.
Sincerely yum,
A. Preston Howard, Jr., P-E.
cc Central Files
Mooresville Regional Office
Permits and Engineering Unit
Facilities Assessmew Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Actlon Employer 50% recycled/ 10% post -consumer paper

-Ot QG
7
C � �
� g 0 1
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr. Michael ^ — ? 92*(
27S
113
G13.124 6? 61 n
_t,. L azure
Temperature
Michael F. Easley
Governor
William G. Ross. Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
March 4, 2003
70012510 0004 8287 7927
e of Violation - Effluent Limitations
Allen Steam Station
-S Permit No. NC0004979
n County
report for the subject facility revealed violations of
ported Value
Limit
960F
95T FIN
970F
950F FIN
990F
95T FIN
100°F
950F FIN
98OF
950F FIN
980F
950F 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,
l) /��
D_ Rex Gleason, P.E.
Water Quality Regional Supervisor
cc: Point Source Compliance/Enforcment Knit
RMB
�:;A Customer Service Mooresville Regional Office, 919 North Main Street, Mooresville. NC 28115 PHONE [phone],39
,NCDENR 1 800 623-7748 FAX [phone]

r O �
-. tasley, Governor
t
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
August 12, 2002
Mr. Michael Rhue, Manager Water Protection
Duke Engery Corporation
13339 Hagers Ferry Road
Huntersville, North Carolina
Dear Mr. Rhue:
28078-7929
Subject: Compliance Biomonitoring Inspection
Duke Power Allen Steam Station
NPDES Permit No. NC0004979
Gaston County, NC
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 [phone].
Sincerely,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Enclosure
cc: Central Files
Kevin Bowden, Aquatic Toxicology Unit
Gaston County Health Department
'M
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 follows:
Test Type
Test Concentration
Test Result
Control Survival
Control Mean Reproduction
Test Treatment Survival
Treatment Mean Reproduction
First Sample pH
First Sample Conductivity
First Sample Total Residual Chlorine
Second Sample pH
Second Sample Conductivity
Second Sample Total Residual Chlorine
3-Brood Ceriodaphnia dubia pass/fail
16% sample
Pass
100%
23.7 neonates
100%
23.4 neonates
5.94 SU
184 micromhos/cm
<0.030 mg/1
6.11 SU
185 micromhos/cm
<0.030 mg/l
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
- Aquatic Toxicology Unit
August 6, 2002
MEMORANDUM
To: Rex Gleason
Water Quality Supervisor, MRO
Through: Matt Matthews (V%rf'
Supervisor, Aquatic Toxicology Unit
From: Sandy Mort./10
Quality Assurance Officer, Aquatic Toxicology Unit
Subject: Whole effluent toxicity test results
Duke Power -Allen 002
NPDES Permit # NC0004979/002
Gaston County
NC DEPT- OF
AND NATO.:RA;,
MOORES`J!Lf_,
AUG 0 8 2002
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 [phone].
Basin: CTB34
cc: Central Files
Environmental Sciences Branch Water Quality Section

F W ATF
Michael F. Easley
\Q PG Governor
co f William G. Ross, Jr., Secretary
r- Department of Environment and Natural Resources
p < 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.
TC6cN:t
Customer Service
1 800 623-7748
Sincerely,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Division of Water Quality 919 North Main Street Mooresville, NC 28115 Phone [phone]
Fax [phone]

0F W A2F Michael F. Easley
�
O QG Governor
� William G. Ross, Jr., Secretary
> Department of Environment and Natural Resources
p `C Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
Ms. Kathryn Tronsberg
Senior Manager, Financial
Deloitte & Touche LLP
Valuation Group
2500 PPG Place
Pittsburgh, Pennsylvania
Dear Ms. Tronsberg:
February 13, 2002
Advisory Services Group
15222-5401
SUBJECT: Tax Certification
No.TCS-MV-025
Wastewater Treatment Facilities
Duke Power
Allen Steam Station
NPDES No.NC0004979
Gaston County, North Carolina
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
W',2DEN
Customer Service
1 800 623-7748
Division of Water Quality 919 North Main Street Mooresville, NC 28115 Phone [phone]
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

IZ,
l I.
Page Two
Duke Power
Tax Certification
'
Approval, or
other document
of approval issued by the
Commission;
and1
d. Have as their
primary rather
than incidental purpose
#w"i
the reduction
of water pollution resulting from the
discharge of
wastewater.
'J
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

PF72500r
e & Touche LLP
ion Group
PG Place
Pittsburgh, Pennsylvania 15222-5401
Tel: [phone]�
Fax: [phone]
1 j�
www.us.deloine.com
V Deloitte
&Touche
R E C E I VE U
January 28, 2002
•1 A N 0 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
Page 2
Please amend Duke Power's original request for
following waste disposal system descriptions for
upon the verbal understandings reached between Mr
I. Ash Basin System:
CARS-02-113
tax exemption certification to include the
tax exemption certification purposes based
. Bou-Ghazale and our office:
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,
I
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
Con
Gaston County
enser
Cooling
Water
E
D
M Misc. Equip.
Cooling and
Seals
NPDES # NC0004979
001
003
0
Water A m. Coal Handling Sanitary
Treatment Sumps Waste
G H
v Q
L J Boiler
Stormwater (1) Coal Yard T
CATAWBA A Service Sump
RIVER Water
F
c
I ntakE
Screen
Backwash
={ Filter
B I Backwash
K Y Turbine Room and Drainage
ilo-
N Sumps Sump
Boiler Room R
Sumps
P S
I Ash I
Sluicing
Stormwater (2)
Ash
Basin 002
X
Permanent Lines
__..... Temporary Lines
004

PDuke
Energy
February 11, 2002
Ms. Coleen Sullins
North Carolina Department of Environmental,
Health and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
IBC Orr-PT.OF ENVAOTNMl=tNT
jam.rj:sL.,RCES _
t�- a
FEB 1 5 2002
Duke Energy Corporation
Energy Center
PO. sox 1006
Charlotte, NC 28201-1006
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:
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,
s
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
R°ex Gleason, NCDENR, Mooresville, NC
Steve Mauney, NCDENR, Winston-Salem, NC

NPDES Permits Currently Held:
"Allen Steam Station - NC0004979
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
J 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 - RCG500110
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

Deloitte &Touche LLP
Valuation Group
2500 PPG Place
Pittsburgh, Pennsylvania 15222-5401
Tel: [phone]
Fax: [phone]
www.us.deloitte.com
January 28, 2002
Deloitte
& Touche
RECEIVED
JAN 3 0 2002
NC DEPT OF ENVIRONMENT
AND NATURAL RESOURCES
MOORESVILLE REWONAL 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
CARS-02-113
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
Page 2
Please amend Duke Power's original request for
following waste disposal system descriptions for
upon the verbal understandings reached between Mr
I. Ash Basin System:
CARS-02-113
tax exemption certification to include the
tax exemption certification purposes based
. Bou-Ghazale and our office:
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,
n `Ironsberg
Manager, Financial Advisory
Attachment
Group
Kelly Voelkel (L)uxe tnergy - riouston)
Don Scruggs (Duke Power - Allen Steam Station)
Jeff Binkley (Deloitte & Touche - Atlanta)

Plant Allen Water Use Schematic NPDES#NC0004979
Condenser Gaston County
Cooling 001
Water
E
D
M Misc. Equip.
003
Cooling and
Seals o
Water JH
Coal Handling Sanitary
Treatment Sumps WasteG Stormwater (2)
v Q
L J Boiler
i IStormwater (1) Coal Yard T Ash
CATAWBA A Service Sump Basin 002
RIVER Water
F
K Y Turbine Room and Drainage X
N Sumps Sump
Boiler Roam J. R
Sumps
C
Intake P S
Screen Ash
Backwash
Sluicing
Clamtrap
Filter
B Backwash
_ Permanent Lines
... Temporary Lines
004

FOSSIL -HYDRO GENERATION
S I Duke
Powers,
A Duke Energy Company
June 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
NPDES Permit Number NC0004979
Dear Ms. Williams:
Duke Power
EC11E / 526 South Church Street
Charlotte, NC 28202-1802
Ve c te- , cc
NC DEPT. OF ENIRONMENT
*AV NATURAL RESOURCES
03DRE��SggYILLE RaPOWNAL OFFICE
�1
rlUN 1 3 20n S
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,
VIA
Michael A. Ruhe, Manager
Environmental Support
www.duke-energy.com

N.C. DrpTr
. o
ENVgZONM7,, rrr:,
Sl\v( & NATURAL ENJ', 1 'TFf
' OiJKCLS
USEPA, Region IV OCT
Compliance Branch 2 0 1995
345 Courtland Street, NE
Atlanta, GA 30365 arriSit�fiJ
Gr`h�E
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, CE(, 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