NC0004961_Regional Office Historical File Pre 2018 (4)

ts DUKE
ENERGY® James Wells
Vice President
Environmental,Health&Safety-
Coal Combustion Products
526 South Church Street
Mail Code EC12H
Charlotte, NC 28202
[phone]
RECEIVEDINCDENRIDWR
January 26, 2018 JAN 2 9 1U18
Via Overnight Mail wOROS
MOORESVILLE REGIONAL OFFICE
Corey Basinger
Mooresville Regional Supervisor
North Carolina Department of Environmental Quality
Division of Water Resources
Regional Water Quality Operations Section
601 East Center Avenue, Suite 301
Mooresville, NC 28115
Bob Sledge
North Carolina Department of Environmental Quality
Water Quality Permitting Program
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Report Under Special Order by Consent - SOC No. S16-005
Duke Energy Carolinas, LLC - Riverbend Steam Station
NPDES Permit NC0004961
Dear Mr. Basinger and Mr. Sledge:
On behalf of Duke Energy Carolinas, LLC ("DEC"), I am submitting to you the Riverbend Steam
Station Progress Report summarizing the work and activities undertaken with respect to closure
of coal ash surface impoundments as required by the Riverbend Steam Station NPDES Permit
NC0004961 Special Order by Consent ("SOC"), SOC No. S16-005 Section 2. d.
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.

Mr. Corey Basinger and Mr. Bob Sledge
January 26, 2018
Page 2
Please direct any questions concerning the Riverbend Steam Station NPDES Permit
NC0004961 SOC No. S16-005 to Brad Loveland at [phone].
Sin y,
James ells
Vice P sident, Environment, Health & Safety-
Coal C mbustion Products
Duke Energy
CC: Richard Baker, Duke Energy
Brad Loveland, Duke Energy
Rick Massey, Duke Energy
George Hamrick, Duke Energy
Paul Draovitch, Duke Energy
Matt Hanchey, Duke Energy

NPDES PERMIT NC0004961
SPECIAL ORDER BY CONSENT EMC SOC WO S16-005
QUARTERLY EXCAVATION PROGRESS REPORT
RIVERBEND STEAM STATION
JANUARY 26, 2018

I. Background and Summary
On November 10, 2016, Duke Energy Carolinas, LLC ("DEC") and the North Carolina
Environmental Management Commission entered into Special Order by Consent—EMC SOC
WQ S 16-005 ("SOC") applicable to the Riverbend Steam Station ("Riverbend"). This report is
submitted in accordance with paragraph 2.d of the SOC. In compliance with Section 2. d. this
report summarizes the work and activities undertaken with respect to closure of coal ash surface
impoundments at Riverbend, including a status update for necessary permits. The quarterly
reports are due no later than the last day of January, April, July, and October for the duration of
the SOC.
A. Riverbend Steam Station Closure Summary
Riverbend is located off of Horseshoe Bend Beach Road near the town of Mt. Holly in
Gaston County, North Carolina, on the south bank of the Catawba River. The site contains two
ash basins, as well as the Dry Ash Stack and the Cinder Pit. As of April 2013, all of the coal-
fired units were retired. As of December 31, 2017, approximately 3,912,313 tons of ash has
been excavated from the site representing 82% of the total estimated ash on site.
The North Carolina Coal Ash Management Act of 2014 ("CAMA") requires that ash
from the Riverbend Plant's ash basins be excavated and relocated to a lined facility with the ash
basins closed by August 1, 2019. The initial excavation plan was submitted to the NCDEQ on
November 13, 2014, detailing the first 12— 18 months of projected ash basin excavation
activities. Updated plans were previously submitted in December of 2015 and 2016. An
additional updated plan that highlighted the completed milestones and provided the status of
necessary permits was also submitted to NCDEQ on December 1, 2017.
The Riverbend facility continues to excavate ash by rail to the Brickhaven Structural Fill
site. Between October 1, 2017 and December 31, 2017, the site has transported 641,820 tons of
ash from the Riverbend basins. Ash was excavated from the Primary and Secondary ash basins
as well as the Ash Stack. Excavation and transportation of the remaining ash from the Ash
Stack, Ash Basins, as we well as the Cinder Pit is expected to be completed in 2018. Final
closure activities, including decommissioning of the Primary and Secondary Dams, will begin
following the completion of ash excavation activities. A total of 2,303,071 tons of ash was
excavated from the Primary Basin at the Riverbend site in 2017.
Since completing bulk dewatering in February, 2017, basins have been maintained in a
dewatered state with interstitial and contact stormwater being treated through the on-site water
treatment facility.
1

The Riverbend site is on track to comply with the ("CAMA") deadline of complete
excavation of the ash basins by August 1, 2019, with an expected completion in advance of the
contract completion date of March 31, 2019.
Ash Transported Off Site in Thousands of Tons I October 2017 to December 2017
Riverbend Ash Transportation
35C
300
250 _
200
■ Planned
150 --- ------ '_ ■Actual
100
1F1
0 T T T t r T T r T -1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ash Transported Off Site in Millions of Tons
Riverbend
5
4
4
c 3
0
2 Plan
0 2
Actual
1
1
ul up up up t.0 r` r` r` co o0 00 co rn
0 0 \ 0 o 0 CD o o 0 o 0 CD o 0 o
Ul 00 1--1 N Lnn co c-1 N ul 00 N ul 00
O O O O O O O O O O O O
2

Status of Permits and Permit Applications
RECEIVED DATE (R)
MEDIA PERMIT ! COMMENTS
/TARGET DATE(T)
NCDEQ issued the ISW
permit to the Company on
NPDES Industrial May 15, 2015. SPPP
Stormwater Permit May 15, 2015 (R) Implementation date was
November 15, 2015.
NPDES Wastewater First quarter 2016(R)
(modified by SOC in Permit became effective
Water Permit—Major December 1, 2016.
Modification fourth quarter2016)
Jurisdictional Wetland and There are no identified
Stream Impacts/404 N/A jurisdictional
Permitting and 401 WQC wetland/stream impacts.
Intermediate Dam Submitted May 31, 2016
Decommissioning June 16, 2016 (R) and received approval on
Request Approval June 16, 2016.
Primary Dam was modified
in late 1970's by adding 10
Primary Dam Modification August 7, 2017 (R) feet, partially over ash. This
soil requires removal in
order to excavate the ash
below.
Dam Safety Transportation and
excavation activities must
not impact a jurisdictional
dam or dike.
Primary and Secondary Excavation activities are
Dam Decommissioning May 1, 2018 (T) initially staying 50 feet
Request Approval away from the jurisdictional
dike. Removing ash from
the Primary and Secondary
Ash Basins will have to be
reviewed with Dam Safety.
Breaching of dike will
require Dam Safety
approval.
Mine Reclamation
Received Permit to Owner/Operator obtained
Waste Individual Structural Fill Operate an individual structural fill
Permit October 15, 2015 permit as set forth in Part II,
§ 130A-309.219 of CAMA.
Site-specific
Nuisance/Noise/Od or/
Other Requirements Other Requirements, N/A None identified.
including DOT and FERC
Requirements
3

F ROY COOPER
Governor
MICHAEL S. REGAN
Secretory
Water Resources LINDA CULPEPPER
ENVIRONMENTAL QUALITY
Interim Director
November 13, 2017
Mr. Ronnie Goodman, Superintendent
Power Generation Operations/Plant Demolition
Duke Energy Carolinas. LLC
Riverbend Steam Station
175 Steam Plant Road
Mount Holly, NC 28120
Subject: Bioassay Compliance Inspection
Riverbend Steam Station
NPDES Permit No. NC0004961
Gaston County
Dear Mr. Goodman:
Enclosed is a copy of the laboratory results for the effluent samples collected during the
Bioassay Compliance Inspection performed at the subject facility on November 7, 2017, by Ori
Tuvia and Brandy Costner. The sampling results revealed that the facility passed the Whole
effluent toxicity test (see attached results). Please inform the facility's Operator-in-Responsible
Charge (ORC) of our findings by forwarding a copy of the enclosed report.
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
MRO Files
Richard Massey (E-Copy)
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115
Phone:[phone] Fax:[phone] Customer Service:1-R77-671-R74R

Division of Water Resources
November 17,2017
MEMORANDUM
To: Corey Basinger
Water Quality Regional Operations,.) MR0..—
Through: Cindy A.Moore ( i
Supervisor,Aquatic Toxicology Branch(ATB)
j
From: Carol Hollenkamp
Quality Assurance Officer,Aquatic Toxicology Branch(ATB)
Subject: Whole effluent toxicity test results
Duke Power—Riverbend Steam Station Power Plant
NPDES Permit#NC0004961/002
Gaston County
The aquatic toxicity test using grab samples of effluent discharged from Duke Power's Riverbend
Steam Station Power Plant has been completed. The Duke Power R verbend Steam Station
facility discharges to the Catawba River(7Q10 of 80.0 CFS). Whole effluent samples were
collected on November 7 and November9 by Ori Tuvia and facility representative Rick Massey for •
use in a chronic Ceriodaphnia dubia pass-fail toxicity test. The test passed. Toxicity test
information follows.
Test Type 3-Brood Ceriodaphnia dubia chronic pass-fail
Test Result Pass
Test Concentrations 2.7%
Control Survival 100%
Control Mean Reproduction 22.3 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 21.5 neonates
First Sample pH 7,60 SU
First Sample Conductivity 425 micromhos/cm
First Sample Total Residual Chlorine <0.1 mg/L
Second Sample pH 7.55 SU
Second Sample Conductivity 424 micromhos/cm
Second Sample Total Residual Chlorine <0.1 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 and tested by ETS. The chronic Ceriadaphnia
dubia pass/fail test run by ETS resulted in a pass. Please contact us if you have any questions or if
further effluent toxicity monitoring is desired. We may be reached at(919)743-8401.
Basin: Catawba
cc: Ori Tuvia(MRO)

F1r
RoYC9Governor
MICHAEL S. REGAN
Secretary
Water Resources LINDA CULPEPPER
ENVIRONMENTAL QUALITY
Interim Director
November 13, 2017
Mr. Ronnie Goodman, Superintendent
Power Generation Operations/Plant Demolition
Duke Energy Carolinas. LLC
Riverbend Steam Station
175 Steam Plant Road
Mount Holly, NC 28120
Subject: Bioassay Compliance Inspection
Riverbend Steam Station
NPDES Permit No. NC0004961
Gaston County
Dear Mr. Goodman:
Enclosed is a copy of the Compliance Evaluation Inspection for the inspection conducted
at the subject facility on November 7, 2017, by Ori Tuvia and Brandy Costner. Richard Massey'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.
Chronic toxicity split samples were taken during the inspection. Results of the split
samples will be forwarded upon completion of analyses.
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
Richard Massey (E-Copy)
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115
Phone:[phone] Fax:[phone]\Customer Service:1-877-623-6748

United States Environmental Protection Agency Form Approved.
EPA Washington'D.C.20480 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 I 2 15 1 3 I N00004981 111 12 I 17/11/07 I17 18 1111 I 19 I I 2011
21I I I I 1 I I I I I II I I I I I I I I I I I I I I I I I I I I I I I II I I I I I 166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA Reserved
67I2.0 I 70 El
1d 1 71 In itJ 1 J 72 1 rJ I 73I I I74 751 I I I I I I l80
Section B:Facility Data
L 1
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES oermit Number) 09:55AM 17/11/07 18/12/01
Riverbend Steam Station
Exit Time/Date Permit Expiration Date
NC Hwy16
Mount Holly NC 28120 12:30PM 17/11/07 20/02/29
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Richard S Massey/ORC/704-263-3202/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Tim Hill,400 S Tryon St Charlotte NC 28202/Station Manager/919-546-2565/
No
Section C:Areas Evaluated During Inspection(Check only those areas evaluated)
Permit El Flow Measurement MI Operations&Maintenance Records/Reports
II Self-Monitoring Program Sludge Handling Disposal • Facility Site Review Effluent/Receiving Waters
In 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
CostnerBrandy
MRO WQ//704-235-2185/
MRO Q/I7 4-663-1699/
II / 13/� �
Ori A Tuvia
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
W.Corey Basinger MRO WQ11704-235-2194/
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete. /��c, r 3 1JA/ Zpi
Page# 1

NPDES yr/mo/day Inspection Type 1
31 NC0004961 111 121 17/11/07 117 18 i„I
Section D:Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Brandy Costner co-inspector.
Chronic toxicity split samples were taken during the inspection. Results of the split samples will be
forwarded upon completion of analyses.
Attached a flow diagram with a detailed breakdown of the ash basin dewatering treatment unit.
Page# 2

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 11/07/2017 Inspection Type: Bioassay Compliance
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new 0 0 0 0
application?
Is the facility as described in the permit? 0 0 0 0
#Are there any special conditions for the permit? 0 0 ❑ 0
Is access to the plant site restricted to the general public? 0 0 0 0
Is the inspector granted access to all areas for inspection? 0 0 0 ❑
Comment: The subject permit expires on 2/29/2020.
The facility has been shut down since March 2013. Duke Enemy is progressing towards the
closure of the ash basins and demolishing the plant infrastructure within the next few years.
Duke Energy is in the process of dewatering the ash basins.
Record Keepino Yes No NA NE
Are records kept and maintained as required by the permit? • 0 0 0
Is all required information readily available,complete and current? • 0 0 0
Are all records maintained for 3 years(lab. reg. required 5 years)? 0 0 0 •
Are analytical results consistent with data reported on DMRs? • ❑ ❑ ❑
Is the chain-of-custody complete? • 0 0 0
Dates,times and location of sampling ❑
Name of individual performing the sampling ❑
Results of analysis and calibration 0
Dates of analysis ❑
Name of person performing analyses ❑
Transported COCs ❑
Are DMRs complete:do they include all permit parameters? II 0 0 0
Has the facility submitted its annual compliance report to users and DWQ? 0 0 • 0
(If the facility is=or>5 MGD permitted flow)Do they operate 24/7 with a certified operator 0 0 • 0
on each shift?
Is the ORC visitation log available and current? • 0 0 0
Is the ORC certified at grade equal to or higher than the facility classification? • ❑ ❑ ❑
Is the backup operator certified at one grade less or greater than the facility classification? 1110 ❑ ❑
Is a copy of the current NPDES permit available on site? • 0 0 0
Facility has copy of previous year's Annual Report on file for review? 0 0 • 0
Comment: The records reviewed during the inspection were organized and well maintained. DMRs,
COCs, ORC logs and calibration Zoos were reviewed for the period March 2017 through
September 2017. No flow from outfalss 001, 002A, seep 1, seep 3, seep 4 seep 5, seep 6,
seep 9, seep 10, seep 11 and seep 12.
Page# 3

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 11/07/2017 Inspection Type: Bioassay Compliance
Record Keeping Yes No NA NE
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? M ❑ ❑ ❑
Are all other parameters(excluding field parameters)performed by a certified lab? • ❑ ❑ 0
#Is the facility using a contract lab? • ❑ 110
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees 11 0 0 0
Celsius)?
Incubator(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? 0 0 • 0
Incubator(BOD)set to 20.0 degrees Celsius+/-1.0 degrees? 0 0 • 0
Comment: The facility is certified to perform on-site field analyses(pH and temperature) under
laboratory certification#5157. Duke Energy's Environmental Services Laboratory
(Certification#248)and contracted Labs ETS, Inc. (toxicity), PACE (Sample collection from
seeps and trubidty)and Prism (Effluent discharge collection)are used for analytical support.
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? Cl ❑ • 0
Is sample collected below all treatment units? • 0 0 0
Is proper volume collected? • ❑. ❑ ❑
Is the tubing clean? 0 ❑ � ❑
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees 0 ❑ 11 0
Celsius)?
Is the facility sampling performed as required by the permit(frequency,sampling type • 0 0 0
representative)?
Comment: The subject permit requires effluent grab samples.
Chronic toxicity split samples were taken during the inspection. Results of the split samples
will be forwarded upon completion of analyses.
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? • 0 0 ❑
Does the facility analyze process control parameters,for ex: MLSS, MCRT,Settleable ❑ 0 • 0
Solids,pH, DO,Sludge Judge,and other that are applicable?
Comment: Ash in the ash stack is currently being removed and transported using rail system to
transport the ash to a permitted site in Moncure, North Carolina.
Equalization Basins Yes No NA NE
Is the basin aerated? 0 0 I 0
Is the basin free of bypass lines or structures to the natural environment? MOOD
Page# 4

Permit: NC0004981 Owner-Facility: Riverbend Steam Station
Inspection Date: 11/07/2017 Inspection Type: Bioassay Compliance
Equalization Basins Yes No NA NE
Is the basin free of excessive grease? • 0 0 0
Are all pumps present? • 0 0 0
Are all pumps operable? • 0 0 0
Are float controls operable? 0 0 II 0
Are audible and visual alarms operable? 0 ❑ II. ❑
#Is basin size/volume adequate? 0 0 II 0
Comment: The facility EQ basin is used to ensure study flow into the treatment plant.The EQ also
receives backflow of residual solids in the treatment process(supemate).
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? • 0 0 0
Are the receiving water free of foam other than trace amounts and other debris? • 0 0 0
If effluent (diffuser pipes are required) are they operating properly? 0 0 III 0
Comment: Discharge from the permitted outfall and seeps did not appear to negatively impact the
stream.
Page# 5

�'
a DUKE Environmental Services
'' ENERGYs RECEIVED/NCDENR/DWR
Duke Energy
Riverbend Steam Station
O C T 4 2017 175 Steam Plant Rd.
Charlotte,NC 28120
WQROS
MOORESVILLE REGIONAL OFFICE
October 3, 2017
NC Department of Environmental Quality
Water Pollution Control System Operators Certification Commission
1618 Mail Service Center
Raleigh, NC 27699-1618
Subject: Duke Energy Carolinas, LLC
Operator in Responsible Charge Designation Form
Riverbend Station -Permit # NC0004961
Please see the enclosed ORC Designation Form reflecting a change as follows:
Delete Chris Gilbert as Primary ORC at Riverbend Station
Add Richard Massey as Primary ORC at Riverbend Station
Add Don Scruggs as a Backup ORC at Riverbend Station
All other information remains current and no other changes are necessary at this time. Please
contact me at [phone] should you require any additional information.
Sin rely,
i/144-22/..,.„ ,
a
i1'. S. Massey
Environmental Specialist
Riverbend Station
Attachment

AECEIVLL:t:,
Water Pollution Control System Operator Designation Form
WPCSOCC
NCAC 15A 8G.0201
MOORESVILLE REGIONAL OFFICE
Permittee Owner/Officer Name: Tim Hill
Mailing Address: 175 Steam Plant Rd.
City: Mt.Holly State: NC Zip: 28120 - Phone#: [phone]
Email address: Tim.Hill@duke- nergv.com
Signature: Date: f" /-)
Facility Name: Riverbend Permit#: NC0004961 County: Gaston
SUBMIT A SEPARATE FORM FOR EACH TYPE SYSTEM!
Facility Type/Grade(CHECK ONLY ONE):
Biological Collection X Physical/Chemical Surface Irrigation Land Application
Operator in Responsible Charge(ORC)
Print Full Name: Richard Massey Email: [e-mail]
Certificate Type/Grade/Number: Grade 2/Physical Chemistry/Certificate#1005088
Work Phone#: [phone]
�Signature: cr...5/07-
/l, _.
"I certify that I agree to my designation as the tor 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."
Back-Up Operator in Responsible Charge(BU ORC)
Print Full Name: Ron Cobb Email: [e-mail]
Certificate Type/Grade/Number: Grade 1/Physical Chemistry/Certificate#1003921
Work Phone#: [phone]
Signature: ''�aS� � - Date: 9/ 2/// 7
"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 BU ORC as set forth in l5A NCAC 08G.0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
RECEIVED/NCOENR/ WF
T
Revised 05-2015
WOROS
MOORESViI_LF REG!ONAL OFFICE

k-Up Operator in Responsible Charge (BU ORC)
Print Full Name: Donald Scruggs Email: [e-mail]
Certificate Type/Grade/Number: Grade 1/Physical Chemistry/Certificate#27892
Work Phone#: [phone]
Signature: C (/ fe� Date: 744/7
"1 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 BU ORC as set forth in 15A NCAC 08G.0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Mail,fax or email the WPCSOCC, 1618 Mail Service Center, Raleigh,NC 27699-1618 Fax:[phone]
orieinal to: Email:[e-mail]
Mail or fax a gaup the Mooresville
appropriate Regional Office: 610 E Center Ave
Suite 301
Mooresville 28115
Fax:[phone]
Phone:[phone]
Revised 05-2015

Paul Draovitch
DUKESenior Vice President
ENERGY® Environmental,Health&Safety
526 S. Church Street
Mail Code:EC3XP
Charlotte,NC 28202
(980)-373-0408
tiECE1VEL;/NC0ENR/DW
August 4, 2017M :AUG ;�(�1
WO_;tROSONAL OFFICE
Mr.Jeff Poupart,Section Chief
C'O�'ESVILLE R
NC Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Owner Affiliation and Facility Contacts for North Carolina NPDES Correspondence
Duke Energy NPDES Permitted Facilities
Dear Mr. Poupart:
As discussed with you by Richard Baker and Shannon Langley on July 5, 2017, Duke Energy has recently
noted an increased number of documents and correspondence from your agency being directed to the
attention of incorrect staff persons for our NPDES permitted facilities. A few recent examples include
the annual NPDES inspection report for the Mayo Steam Station and a Notice of Violation for the Cape
Fear plant being sent to the Vice President of Harris Nuclear Plant; as well as correspondence for the
Allen Steam Station sent to the South Carolina Director of Environmental Policy. In each case,this has
led to delays in the permitted facility receiving information and impacts our ability to provide time
sensitive responses to the Department of Environmental Quality(DEQ).
Duke staff have discussed this situation with DEQ staff in the central and various regional offices. Based
on our conversations and a review of information captured in your BIMS system,we believe the best
way to address this is with the following included information:
1. A single name/ownership change form to request that the"owner affiliation"for entities Duke
Energy Progress, LLC(DEP)and Duke Energy Carolinas, LLC(DEC) be updated with my contact
information. There appear to be numerous obsolete contacts listed as"owner contact persons"
in your BIMS database-that field can be updated to include my name and the others removed.
2. The "permit billing contact person"should be updated for all facilities to name Cynthia Winston,
Manager,410 S.Wilmington Street, NCRH15, Raleigh NC 27601. She can be reached at
[phone] and [e-mail].
3. The "facility contact person"for each facility should reflect the Station Manager at the site. A
list of current Station Managers for all DEP and DEC facilities is attached to this correspondence.
4. The fields for"permit contact person" and "persons with signatory authority" have been
recently updated as part of the e-dmr registration process and appear accurate as of this time.
Based on this information,I would envision that general correspondence applicable to more than one
Duke Energy facility,such as groundwater information or other programmatic issues, should be directed

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

FACILITY CONTACTS(STATION MANAGERS)FOR DUKE ENERGY FACILITIES-AUGUST 4,2017
NPDESStormwater -'NPDESWastewater - General
Owner Name Facility Name Station Type Permit Number Permit Number- Permit • Facility.Contact Facility Contact Address
Number
Duke Energy Carolinas,LLC Allen Coal NCS000546 NC0004979 Brent Dueltt,Station Manager 253 PLANT ALLEN RD,BELMONT NC 28012
Duke Energy Progress,LLC Asheville Coal/CT NCS000575 NC0000396 Garry A.Whisnant,Station Manager 200 CP&L DRIVE,ASHEVILLE NC 28704
Duke Energy Carolinas,LLC Bear Creek Hydro NCG500124 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Belews Creek Coal NCS000573 NC0024406 Regina)D.Anderson,Station Manager 3195 PINE HALL ROAD,BELEWS CREEK NC 27009
Duke Energy Progress,LLC Blewett Falls Hydro NCG500190 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Carolinas,LLC Bridgewater Hydro NCG500102 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Progress,LLC Brunswick Nudear NCS000590 NC0007064 William R.Gideon,Site VP 8470 RIVER RD.SE,SOUTHPORT NC 28461
Duke Energy Carolinas,LLC Bryson Hydro NCG500129 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Buck Coal/CT NC0004774 Henry A.Botklns,Station Manager 1385 DUKEVILLE ROAD,SAUSBURY NC 28146
Duke Energy Progress,LLC Cape Fear Coal/CT NCS000574 NC0003433 Issa J.Zarzar,Station Manager 411 FAYETTEVILEL STREET,RALEIGH NC 27601
Duke Energy Carolinas,LLC Cedar Cliff Hydro NCG500125 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Cliffslde Coal NCS000571 NC0005088 Dave Barnhardt,Station Manager 573 DUKE POWE ROAD,MOORESBORO NC 28114
Duke Energy Carolinas,LLC Cowans Ford Hydro NCG500139 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Carolinas,LLC Dan River , Coal/CT NCS000572 NC0003468 Lawrence D.Sparks,Station Manager 864 5 EDGEWOOD RD,EDEN NC 27288
[juke Energy Progress,LLC Harris/HEEC Nudear NC0039586 Benjamin C.Waldrep,Site VP 400 S TRYON ST,CHARLOTTE NC 28202
Duke Energy Progress,LLC Lee/Wayne County Coal/CC NC0003417 Jeffery D.Hines,Station Manager 1199 BLACK JACK CHURCH RD,GOLDSBORO NC 27530
Duke Energy Carolinas,LLC Uncoln Cr NC0080781 Henry A.Botkins,Station Manager 1385 DUKEVILLE ROAD,SAUSBURY NC 28146
Duke Energy Carolinas,LLC Lookout Shoals Hydro NCG500120 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Progress,LLC Marshall Hydro NCG500591 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Marshall Coal NCS000548 NC0004987 Rick R.Roper,Station Manager ' 8320 EAST NC HWY 150,TERRELL NC28682
Duke Energy Progress,LLC Mayo Coal NCS000580 NC0038377 Tom Copolo,Station Manager 10660 BOSTON ROAD,ROXBORO NC 27574
Duke Energy Carolinas,LLC McGuire Nudear NCS000020 NC0024392 Steven D.Capps,Slte VP 12700 HAGERS FERRY RD,HUNTERSVILLE NC 28087
Duke Energy Carolinas,LLC Mission Hydro 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 Nantahaia Hydro NCG500136 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Oxford Hydro NCG500119 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Carolinas,LLC Rhodhiss Hydro NCG500108 Michael T.Brassie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Progress,LLC Richmond County CC y NCG500594 Thomas Hanes,Station Manager 198 ENERGY WAY,HAMLET NC 28345
Duke Energy Carolinas,LLC Riverbend Coal/CT NC5000549 NC0004961 Tim Hill,Station Manager 400 S TRYON ST,CHARLOTTE NC 28202
Duke Energy Carolinas,LLC Rockingham Cr NC0086665 Lawrence D.Sparks,Station Manager 864 S EDGEWOOD RD,EDEN NC 27288
Duke Energy Progress,LLC Roxboro Coal NCS000581 NC0003425 Jason V.Haynes,Station Manager 1700 DUNNAWAY ROAD,SEMORA NC 27343
Duke Energy Progress,LLC Sutton Coal/CT NC0001422 Jesse E.Huntley,Station Manager 801 SUTTON STEAM PLANT RD,WILMINGTON NC 28401
Duke Energy Carolinas,LLC Tennessee Creek Hydro NCG500123 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Thorpe Hydro NCG500127 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Progress,LLC Tillery Hydro _ NCG500189 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Carolinas,LLC Tuskasegee Hydro NCG500126 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Carolinas,LLC Tuxedo Hydro NCG500110 Michael T.Brissie,General Manager 257 DUKE LANE,STANLEY NC 28164
Duke Energy Progress,LLC Walters Hydro NCG500188 Preston H.Pierce,General Manager 165 BAD CREEK RD,SALEM SC 29676
Duke Energy Progress,LLC Weatherspoon Coal/CT NC5000589 — NC0005363 Thomas Hanes,Station Manager 198 ENERGY WAY,HAMLET NC 28345

ROY COOPER
f.a'
MICHAEL S. REGAN
vt crre+ Re;ourres S. JAY ZIMMERMAN
VIFONMENTAL:DUAL.i'r
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 Draovitch, P.E.
(Person legally responsible for permit)
Senior Vice President, EH&S
(Title)
4. Mailing address: 526 South Church Street -EC3XP City: Charlotte
State: NC Zip Code:28202 Phone: ( )980-373-0408
E-mail address: [e-mail]
THIS APPLICATION PACKAGE WILL NOT BE ACCEPTED BY THE DIVISION UNLESS ALL OF THE
APPLICABLE ITEMS LISTED BELOW ARE INCLUDED WITH THE SUBMITTAL.
REQUIRED ITEMS:
1. This completed application form
2. Legal documentation of the transfer of ownership (such as a property deed, articles of
incorporation, or sales agreement)
[see reverse side of this page for signature requirements]
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh,NC 27699-1617
919 807 6300 919-807-6389 FAX
hops://deq.nc.gov/about/d ivisions/water-resources/water-resources-permits/wastewater-branch/npdes-wastewater-perm its

NPDES Name&Ownership Change
Page 2 of 2
Applicant's Certification:
I, Paul Draovitch
, attest that this application for a
name/ownership change has been reviewed and is accurate and complete to the best of my
knowledge. I understand that if all required parts of this application are not completed and that
if all required supporting information and attachments are not included, this application
package wil a re me as omplete.
Signature: \\C.�\ c-- Date: 14 l 0
THE COMPLETED APPLICATION PACKAGE, INCLUDING ALL SUPPORTING
INFORMATION & MATERIALS, SHOULD BE SENT TO THE FOLLOWING ADDDRESS:
NC DEQ/ DWR/ NPDES
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Version 7/2016

DUKE RECEIVEDINCDENR/DWR
EHS CCP Environmental Programs
ENERGY JUL - 7 2017 Duke Energy
CAROLINAS 526 South Church Street
WQROS Charlotte, NC 28202
MOORESVILLE REGIONAL OFFICE
Mailing Address
EC13K/P.O.Box 1006
Charlotte,NC 28201-1006
July 5, 2017
Attn: Andrew Pitner
North Carolina Dept.of Environmental Quality
610 East Center Ave.Suite 301
Mooresville, NC 28115
Subject: Duke Energy Carolinas, LLC.
Notice of Closure of Wastewater Outfall 011
Riverbend Steam Station(NC0004961)—Gaston County
Dear Mr. Pitner,
In accordance with the requirements of Part III of NPDES Wastewater Permit No. NC0004961, Duke
Energy is hereby providing Notice of Closure for Wastewater Outfall 011, former Stormwater Outfall 1,
at Riverbend Steam Station located in Gaston County. Riverbend Steam Station retired in April 2013
and full closure is planned by July 2019.
Decommissioning of the Powerhouse and 100kV Switchyard will impact the current location of
Wastewater Outfall 011, its discharge pipe and Oil/Water Separator. As a result, Duke plans to modify
the drainage area, remove the oil/water separator and abandon the discharge pipe.
Post demolition plans in the area will result in non-concentrated sheet flow across grass and other
pervious surfaces.
"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 far 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,
Tim Hill
GM CCP Regional Operations& Maintenance
CC: Brad Loveland
Rick Massey
Ronnie Goodman

ROY COOPER
Governor
FILEAEL S. REGAN
Secretary
Water Resources S. JAY ZIMMERMAN
ENVIRONMENTAL QUALITY
Director
April 4, 2017
Mr. Ronnie Goodman, Superintendent
Power Generation Operations/Plant Demolition
Duke Energy Carolinas. LLC
Riverbend Steam Station
175 Steam Plant Road
Mount Holly, NC 28120
Subject: Compliance Evaluation Inspection
Riverbend Steam Station
NPDES Permit No. NC0004961
Gaston County
Dear Mr. Goodman:
Enclosed is a copy of the Compliance Evaluation Inspection for the inspection conducted
at the subject facility on March 30, 2017, by Ori Tuvia and Brandy Costner. Richard Massey'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.
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
Richard Massey (E-Copy)
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115
Phone:[phone] Fax:[phone] Customer Service:1-877-623-6748

United States Environmental Protection Agency Farm Approved.
t 1-1A Washington.D.C.20460 OMB No.2040-0057
Water Compliance Inspection Report Approval expires 8-31-98
Section A:National Data System Coding(.e.,PCS)
Transaction Code NPDES yrlmo/day Inspection Type Inspector Fac Type
1 U 2 3 NC0004961 111 12 1 17/03/30 117 18 1 n 191 S 201 1
2i1111II ill lllll [ lllllllllll lllllllllllllllr
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA Reserved
6712.0 7014 I 71 t2 i 72 N [ 731 1 1 1 174 751 1
I I 1 1 I I 180
Section 13:Faciity Data 1 1
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Pemit Effective Date
POTW name and NPDES permit Number) 10:00AM 17/03/30 16/03/01
Riverbend Steam Station
NC Hwy 16 Exit Time/Date Permit Expiration Date
Mount Holly NG 28120 03:30PM 17/03/30 20/02/29
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Nurrber(s) Other Facility Data
///
Richard S Massey(ORC/704-263-3202/
Name.Address of Responsible Official/Tille/Phone and Fax Number
Contacted
Brian Kemp,175 Steam Plant Rd Mt Holly NC 28120f/884-398-2668/
No
Section C:Areas Evaluated During inspection(Check only those areas evaluated)
II Permit 1111 Flow Measurement II Operations&MlaintenancE II Records/Reports
▪ Self-Monitoring Program Sludge Handling Disposal 11 Facility Site Review El Effluent/Receiving Waters
• Laboratory
Section D:Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attaerlment summary)
Name(s)and Signature(s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Ori A Tuvia MRO WQ/R04-663-1699/ y ;
Signature of Management Q A Reviewer Agency/OfficeiPhone and Fax Numbers Date
W. Corey Basinger MRO WQ//704-235-2194/
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete. 4 �, ' -Z' 19-
jegvuila_44.44412:__
Page# 1

NPOES yr/mo/day Inspection Type 1
NC0004961 111 121 17/03/30 (17 18 ls�,,i
Section D:Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Brandy Costner co-inspector.
Attached a flow diagram with a detailed breakdown of the ash basin dewatering treatment unit.
•
page# 2

Permit NC0004961 Owner-Facility ` s Steam Station
Inspection Date: 03130/2017 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 0 0 • ❑
application?
Is the facility as described in the permit? • 0 0 0
#Are there any special conditions for the permit? • ❑ ❑ 0
Is access to the plant site restricted to the general public? • 0 0 Cl
Is the inspector granted access to all areas for inspection? • ❑ ❑ 0
Comment: The subiect permit expires on 2/29/2020.
The facility has been shut down since March 2013. Duke Energy is progressing towards the
closure of the ash basins and demolishing the plant infrastructure within the next few years.
Duke Energy is in the process of dewaterind the ash basins.
The facility is classified as a PC-1 but should be classified as PC-2.
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? 1 ❑ ❑
Is all required information readily available,complete and current? MOOD
Are all records maintained for 3 years(lab.reg.required 5 years)? ❑ ❑ 0
Are analytical results consistent with data reported on DMRs? e 0 ❑ 0
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? • 0 0 0
Has the facility submitted its annual compliance report to users and DWQ? 0 ❑ • 0
(If the facility is=or>5 MGD permitted flow)Do they operate 24/7 with a certified operator 001110
on each shift?
Is the ORC visitation log available and current? t 0 0 0
Is the ORC certified at grade equal to or higher than the facility classification? • 0 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? S ❑ ❑ 0
Facility has copy of previous year's Annual Report on file for review? 0 0 I 0
Page# 3

Permit NC0004961 Owner-Facility Riverbend Steam Station
Inspection Date. 0 3130120 1 7 Inspection Type Compliance Evaluation
Record Keeping Yes No NA NE
Comment: The records reviewed during the inspection were organized and well maintained. DMRs,
COCs, ORC logs and calibration logs were reviewed for the period March 2016 through
February 2017. No flow from outfalss 001, 002A, seep 1, seep 3, seep 5,seep 6, seep 7,
seep 9, seep 10, seep 11 and seep 12.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? $ 0 0 ❑
Are all other parameters(excluding field parameters)performed by a certified lab? • ❑ ❑ ❑
#Is the facility using a contract lab? M ❑ ❑ ❑
#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+r-0.2 degrees? ❑ ❑ • ❑
Incubator(BOD)set to 20.0 degrees Celsius+!-1.0 degrees? ❑ ❑ • ❑
Comment: The facility is certified to perform on-site field analyses (pH and temperature) under
laboratory certification#5157. Duke Energy's Environmental Services Laboratory
(Certification#248) and contracted Labs ETS, Inc. (toxicity), PACE(Sample collection from
seeps and trubidty)and Prism (Effluent discharge collection)are used for analytical support.
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? ❑ ❑ II ❑
Is sample collected below all treatment units? • ❑ 0 ❑
Is proper volume collected? • ❑ 0 0
Is the tubing clean? 0 0 • 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees • ❑ ❑ ❑
Celsius)?
Is the facility sampling performed as required by the permit(frequency, sampling type I ❑ 0 ❑
representative)?
Comment: The subject permit requires effluent grab samples.
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? I 0 0 0
Does the facility analyze process control parameters.for ex: MLSS. MCRT. Settleable ❑ ❑ • ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment: Ash in the ash stack is currently being removed and transported using rail system to
transport the ash to a permitted site in Moncure, North Carolina.
Equalization Basins Yes No NA NE
Is the basin aerated? 0 0 • ❑
Page 4

Permit NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date'. 03/30;2017 Inspection Type Compliance Evaluation
Equalization Basins Yes No NA NE
Is the basin free of bypass lines or structures to the natural environment? 0 0 ■ 0
Is the basin free of excessive grease? 0 ❑ II 0
Are all pumps present? 00110
Are all pumps operable? 0 ❑ • 0
Are float controls operable? ❑ 0 II 0
Are audible and visual alarms operable? 0 0 • 0
#Is basin size/volume adequate? ❑ ❑ ■ ❑
Comment: The facility is in the process of building an EQ basin used to ensure study flow into the
treatment plant.The EQ basin will also be the source of backflow of residual solids in the
treatment process (supernate). The ash pond was used at the time of the inspection as the
source of influent and the destination of residual solids.
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? ■ ❑ ❑ 0
Are the receiving water free of foam other than trace amounts and other debris? ■ 0 0 0
If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ 110
Comment: Discharge from the permitted outfall and seeps did not appear to negatively impact the
stream.
Page# 5

IIIIIIII
Step 1: Oxidation and Step 2: Primary Step 3: Chemical Step 4: Secondary
pH Adjustment Clarification Reactions Clarification
Adding oxygen to the water helps Ash and metals that are Dissolved contaminants,like New solids formed in Step 3 settle to the
the treatment process work better already in solid form are arsenic and mercury,react with
and remove contaminants removed from the water by chemicals to form solids that may bottom of the clarifier and are removed.
sinking to the bottom of the
efficiently. clarifier. be removed.
Ash - il' _ - -III :,9.-:
Pond Influent—- -._y,.,. _, _�L -i
xippoinummiplimillowillw 11 _10I10.1= 4
03.110A.T.4'45.04; i . . -.':.:....1.if filEk; 4011KOtt.$1:105,.,''-:,,:iiiii4sii.':" ,;,.....,....,„,....,
[_�� �''. x
Step 5: Initial Step 6: Enhanced Step 7: Final Step 8: Step 9:
Filtering Treatment Filtering Holding Tank Discharge
The water is passed through a Some contaminates The water is passed Additional testing is After testing is complete
sand filter to remove contaminates (selenium)are extremely through a fine screen conducted to ensure the and demonstrated to be
that did not settle in previous difficult to remove and require filter to remove any water has been properly safe for the
treated. environment,aquatic
steps. a special enhanced treatment. remaining small particles. life,and the community,
# i e the water will be safely
.w.., released to the river.
(/ 6Iii LE
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CUSTOMER Duke Energy - Riverbend WEsTECH ENGINEERING.Inc...°r,u.remwa n
°.N,m oPlm
co,Hra�iwNrnry nY rpft+l�apa°uc,.
TITLE OWN,TE70 DWG#:227418-PFD
.I...m°��°° Ash Pond DewateringSystem
11A mM.n p°,mimiun°I WESIEGn Y �1 p
ENGINEERING.INC..lw1)3�i10�: J01)#.2"74�B
www.vesbcMr,c.cam

y DUKE EHS CCP Environmental Programs
k ' ENERGY 4Ft:rivEt,Net),7NR/DUVR
Duke Energy
CARO L I NA S 526 South Church Street
•
Charlotte,NC 28202
".QnCS Mailing Address
_`r- EC13K/P.0 Box 1006
-10,l QL OFFICE Charlotte NC 28201-1006
March 24,2017 -
Attn: Andrew Pitner
North Carolina Dept.of Environmental Quality
610 East Center Ave.Suite 301
Mooresville,NC 28115
Subject: Duke Energy Carolinas,LLC.
Notice of Closure of Wastewater Outfall 001
Riverbend Steam Station(NC0004961)—Gaston County
Dear Mr.Pitner,
In accordance with the requirements of Part III of NPDES wastewater permit NC0004961,Duke Energy is
hereby providing note of closure for Outran 001,once through cooling water atRiverbend Station in Gaston
County,NC. Riverbend is a retired facility and expecting full closure by 2019.
Duke plans to permanently close the Discharge Tunnel at the Riverbend Steam Station,Outfall 001.
Stop logs will be installed at the end of the tunnel and once installed and sealed,dewatering of the
tunnel will occur. Once the tunnel is dewatered,flowable fill mix will be used to permanently fill in the
tunnel.
At the completion of the filling process,stop logs will be left in place and the Discharge Tunnel Outlet
Structure will be left in place. Demolition of structures above grade will occur at a later date.
Please direct any correspondence or questions concerning the Riverbend Steam Station NPDES
Permitting and Compliance to Brad Loveland @ 704-609-5637.
•
"1 certify,wider penalty of low,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 far gathering the
information,the information submitted is,to the best of my knowledge and belief,true,accurate,and complete.lam aware
that there are slgnificont penalties for submitting false information,Induding the possibility of fines and imprisonment for
knowing violations."
Sincere ,
e..„6/
Tim Hill
GM CCP Regional Operations&Maintenance
CC: Brad Loveland
Rick Massey
Ronnie Goodman

DUKE Duke Energy
Vy ENERGY. Riverbend Station
175 Steam Plant Rd
Mt.Holly NC 28210
February 27,2017
Mr.Jeffrey 0. Poupart,Section Chief
Water Quality Permitting Section
North Carolina Division of Water Resources
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Submittal Required by Permit Condition A.(16)
Riverbend Station
NPDES Permit NC0004961
Gaston County
Dear Mr. Poupart:
Pursuant to Part 1,Condition A.(16)of the subject permit Duke Energy is required to 1)determine if
jurisdictional seeps identified in the permit as outfalls 101, 103, 104, 106, 107, 109, 110, 11 and 112
meet the applicable water quality standards set forth in 15A NCAC 2B.200;and 2)demonstrate that
non jurisdictional seeps identified as outfalls 105 and 108 will not cause violation of water quality
standards in the receiving stream. The determination of each of these items is required within 90 days
of the effective date of the permit. Outfall 102 is exempt from condition A.(16) pursuant to Special
Order by Consent No.S16-005. This submittal fulfills the requirements of condition A.(16)of the
subject permit.
Only three of the above named outfalls had measurable flow so that representative samples could be
collected. The outfalls with measured flow were outfall 102,outfall 104 and outfall 108. This is due in
large part to the activities undertaken by Duke Energy and authorized by the Department of
Environmental Quality to lower the water levels in the ash basin in an effort to mitigate seepage and
begin the process of closure. A summary of sampling results obtained in December 2016,January 2017
and February 2017 is provided with this submittal. These results confirm that outfalls 104 and 108 meet
the water quality standards. Outfall 102 exceeds the water quality standard for hardness. The hardness
in outfall 102 is most likely a result of inputs from natural sources,given that the water in the ash basin
does not exceed the hardness standard. As referenced above,outfall 102 is not subject to Condition
A.16 under the Special Order by Consent. Outfall 102 meets the interim hardness limits set forth in the
Special Order by Consent. Duke Energy has agreed to address water quality in outfall 102 according to
the terms and schedule set out in the Special Order by Consent for Riverbend.
As required by the permit, Duke Energy will conduct monitoring for the parameters specified in permit
conditions A.(21.),A.(22.),A.(23.),A.(24.),A.(25.),A.(26.),A.(27.),A.(28.),A.(29.),A.(30.),A.(31.) and
A.(32.),as modified by the Special Order on Consent.

If you have any questions, please contact Brad Loveland at [e-mail] or 704-609-
5637.
"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,
Tim Hill
General Manager
CCP Regional Operations and Maintenance
Riverbend
Cc: Richard Baker(Duke Energy)
Brad Loveland (Duke Energy)
Rick Massey(Duke Energy)
Shannon Langley—Mail Code NC-15
Wes Bell—MRO
610 East Center Avenue,Suite 310
Mooresville, NC 28115

ell, Wes
From: - --- Langley, Shannon <[e-mail]>
Sent: Tuesday, February 28, 2017 10:17 AM
To: Poupart,Jeff
Cc: Bell,Wes; Baker Jr, Richard E; Loveland, Brad P
Subject: Riverbend permit report
Attachments: Signed.Riverbend.Seep.Letter.condition A(16).demonstration.pdf
Jeff,
Attached is an electronic copy of a report demonstrating compliance with condition A.(16)of the Riverbend NPDES
permit. This submittal is consistent with the previous discussions we have had and guidance provided in developing the
report format. A hard copy is coming to you through the US Mail. We can discuss this tomorrow afternoon when we
meet in your office if there are questions. A hard copy is also being sent to the compliance staff in Mooresville.
Thanks.
Shannon
c &Lannon lands#
Lead Environmental Specialist
EHS CCP Environmental Programs
Duke Energy
Office: [phone]
Cell: [phone]
410 South Wilmington 15th floor, Raleigh, NC 27601
DUKE
ENERGY.
1

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///:"----.„\\ 1
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ilp
/ / _ r-
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- - _ _
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SW-012 / SW-002
�/
SW-003' // it .� - �� - - — J
SW-011 •/' �NP�S 011 / , I Stormwater Location Coordinates Outfall Pipe
/ ���///Q� RIVERBEND I Outfall Latitude Longitude Description Location Description
/ LARK STEAM STATION. 49
I SW-002 35.361 -80.975 21"CW West side of htake Canal
< MAINTENANCE /
O I SW-003 35.361 -80.975 36"Ct West side of htake Canal
\ FACILITY • O SW-004 35.357 -80.975 15"RCP East side of Horseshoe Bend Beach Road
\ • � I SW-006 35.361 -80.976 36"CMD West side of Make Canal
\ _> I SW-008 35.364 -80.971 36"CM:, Nbuntain Island Lake
SW-010 35.360 -80.978 18"GNP Wooded area north of Lark Maintenance Facility
\ ,. . 1 SW-011 35.360 -80.979 18"CAP Wooded area west of Lark Maintenance Facility
\ NPDES 001� I SW-012 35.360 -80.978 8"Polyethylene Wooded area north of Lark Maintenance Facility
\ <> / \ \ 1 SW-018 36.362 -80.975 18"RCP East side of htake Canal
\ \ / /p - - / \1 1 1\N
I
N. / // i I 11
N\ / P SW-004 I 1 1 LEGEND:
N / / I 1 I
// /\ / / I I 1 — — — — DUKE ENERGY PROPERTY BOUNDARY
\// N / I/I`
/ — MOUNTAIN ISLAND LAKE BOUNDARY
N /
— — —_ j/ SW-004 • STORMWATER OUTFALL SAMPLE LOCATION
� \
/` \ 1\ / NPDES 002 A NPDES OUTFALL LOCATION
/ 1I I\ /
/ I I I /—
NOTES: SCALE (FEET) DATE
1.PARCEL DATA FOR THE SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AND IS APPROXIMATE.
2.TOPOGRAPHY DATA PROVIDED BY DUKE ENERGY. 300' 0 300' � STORMWATER OUTFALL LOCATION MAP DEC 01, 2016
4.
3.STORMWATER OUTFALL LOCATIONS WERE OBTAINED BY HDR USING A TRIMBLE HANDHELD GPS UNIT ON APRIL 29,2014. I'=600'
4.NPDES OUTFALL LOCATIONS WERE PROVIDED BY DUKE ENERGY AND ARE APPROXIMATE. RIVERBEND STEAM STATION ASH BASIN`
DUKE ENERGY CAROLINAS,LLC FIGURE
GASTON COUNTY,NC 1

Liras DUKE RECEIVED/NCDENR/DWR Harry K.Sideris
Senior Vice President
ENERGY. - 3 2016 Environmental,Health&Safety
523 South Church Street
Mail Code:EC3XP
VA/QROS Charlotte,NC 28202
MOORESVILLE_REGIONAL OFFICE
704-382-4303
May 2,2016
Mr.Jefferey Poupart
Division of Environmental Quality
Division of Water Resources
1617 Mail Service Center
Raleigh,NC 27699-1611
Subject: Permit Application Amendment
Riverbend Station
NPDES Permit NC0004961
Gaston County
Dear Mr.Poupart:
Duke Energy,LLC submitted an NPDES permit application for the Riverbend Station on May 15,2014. In order to meet the
anticipated NPDES permit requirements associated with the discharge of interstitial water from site ash basins,the existing
wastewater treatment process will be supplemented to include temporary and mobile treatment units. The purpose of this
letter is to amend the NPDES permit application to reflect this process and to provide a courtesy notification of these planned
temporary changes.
Duke Energy hereby amends the NPDES permit application to reflect the changes at the plant.
As described in Riverbend's current NPDES Permit,the existing wastewater treatment system for waste flows from Riverbend's
former coal generating facility consists of sedimentation and neutralization processes provided by the two site ash ponds. The
wastewater treatment system will be temporarily supplemented to include the following treatment:
• Caustic,acid,coagulant,and polymer additive feed systems
• Primary and Secondary Clarification
• Metals scavenger system
• Pressure granular media filters
• Biological selenium removal
• Polishing filters
The treated effluent from the expanded wastewater treatment system will be routed along the similar path for final discharge
to Mountain Island Lake. Any low volume wastes(such as reject streams,backwash processes,or liquid residuals)resulting
from this additional treatment will be recycled to various points within the wastewater treatment system(temporary treatment
units and/or the ash ponds). The vendor selected to provide these temporary units will be providing additional operational
support staff for the treatment equipment.
If there are any questions or concerns please contact Brad Loveland @704-609-5637.
Sincerel ,
Harry Sideris
Senior Vice President Environmental,Health and Safety
Enclosure:
cc:1111111111111111F,NCDEQ Water Quality(Mooresville Regional Office)
Steve Reid,NCDEQ Operator Certification Program
Bob Drum,Demo Regional Mgr.-West
Rick Massey,Station Environmental

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NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory Donald van der Vaart
Governor Secretary
August 11, 2015
Mr. Robert"Bob"Drum, Superintendent Operations
Power Generation Operations/Plant Demolition&Retirement
Duke Energy Carolinas LLC
Riverbend Steam Station
175 Steam Plant Road
Mount Holly,North Carolina 28120
Subject: Compliance Evaluation Inspection
Riverbend Steam Station
NPDES Permit No.NC0004961.
Gaston County
Dear Mr. Drum:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the
subject facility on August 5, 2015 by Mr. Wes Bell 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. Bell at(704)235-2192, or at [e-mail].
erely,
Michael L.Parker,Regional Supervisor
Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources,DENR
Enclosure:
Inspection Report
cc: MSC 1617-Central Files/Basement
Gaston County Health Department
WB
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115
Phone:[phone] Fax:[phone] Customer Service:1-877-623-6748
Internet:www.ncwaterquality.org
An Equal Opportunity\Affirmative Action Employer—30%Recycled/10%Post Consumer paper

United States Environmental Protection Agency
Form Approved.
EPA Washington,D.C.20460 OMB No.2040-0057
Water Compliance Inspection Report Approval expires 8-31-98
Section A:National Data System Coding(i.e.,PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 �,,, j 2 [ I 3 I NC0004961 111 121 15/08/05 117 18 Li,, 19 LI 201 I
21II1111 1111 111 11 1I 1 11 1111 1 1 11111 1111111 11 1 1 r6
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA --- —Reserved--------
67I1.o I 701d I 71 I�,- L
I 72 I �,J I 731 I 174 75� 1 1 1 1 1 1 180
LJ 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)
09:30AM 15/08/05 11/03/01
Riverbend Steam Station
NC Hwy 16 Exit Time/Date Permit Expiration Date
Mount Holly NC 28120 12:30PM 15/08/05 15/02/28
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Robert Lowell Drum/ORC/704-263-3217/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Robert Drum,175 Steam Plant Rd Mt Holly NC 28120/Superintendent
Operations/704-263-3217/ Yes
Section C:Areas Evaluated During Inspection(Check only those areas evaluated)
Ill Permit Flow Measurement Operations&Maintenance • Records/Reports
II Self-Monitoring Program Sludge Handling Disposal • Facility Site Review Effluent/Receiving Waters
IIII 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 Insptpr(s) Agency/Office/Phone and Fax Numbers Date
Wes Bell 4 / ; 7 MRO WQ//704-663-1699 Ext.2192/
S' of Management Q A Review 7Agency/Office/Phone and Fax Numbers to
'‘ /97„,..c.,,,.......,..,
c;vi
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

NPDES yr/mo/day Inspection Type 1
31 NC0004961 111 121 15/08/05 117 18 Li
Section D:Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
On-site Representatives:
The following Duke Energy personnel were in attendance during the inspection: Mr. Bob Drum, ORC/
Superintendent Operations/Power Generation Operations/Plant Demolition &Retirement; Ms.Tina
Woodward, Senior Environmental Specialist/CCP Permitting&Compliance/Environment, Health and
Safety; Mr. Thomas Bailey, Principal Environmental Specialist/Environmental Services/Remediation&
Decommissioning; and Mr. Rick Massey/Contract On-site Environmental Coordinator.
•
Page# 2

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 08/05/2015 Inspection Type: Compliance Evaluation
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new • ❑ ❑ ❑
application?
Is the facility as described in the permit? II ❑ ❑ ❑
#Are there any special conditions for the permit? • ❑ 0 ❑
Is access to the plant site restricted to the general public? • ❑ ❑ ❑
Is the inspector granted access to all areas for inspection? • ❑ ❑ ❑
Comment: The Division received the permit renewal application package on 5/19/2014.
The facility has been shut down since March 2013. Duke Energy is progressing towards the
closure of the ash basins and demolishing the plant infrastructure within the next few years.
Duke Energy has proposed a dewatering strategy for the ash basins to the Division via letter
dated 6/22/2015. The proposed pumping activity is currently under review.
The last compliance evaluation inspection was performed at the facility on 9/6/2013.
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? ❑ ❑ III ❑
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? III 0 ❑ ❑
Is a copy of the current NPDES permit available on site? ❑ ❑ ❑
Facility has copy of previous year's Annual Report on file for review? ❑ 0 III ❑
Page# 3

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 08/05/2015 Inspection Type: Compliance Evaluation
Record Keeping Yes No NA NE
Comment: The records reviewed during the inspection(including disposal manifests)were organized
and well maintained. Discharge Monitoring Reports(DMRs)were reviewed for the period
June 2014 through May 2015. No discharges were reported from Outfalls 001, 002, and
002A(sump overflow).
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? 0 0 • ❑
Are all other parameters(excluding field parameters)performed by a certified lab? 0 0 • 0
#Is the facility using a contract lab? ❑ ❑ U ❑
#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 0 II 0
Incubator(BOD)set to 20.0 degrees Celsius+/-1.0 degrees? 0 0 • ❑
Comment: The facility is certified to perform on-site field analyses(pH and temperature) under
laboratory certification#5157. Duke Energy's Environmental Services Laboratory
(Certification#248)and the contracted services of ETS, Inc. (toxicity)would be used for
analytical support.
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? 0 0 • 0
Is sample collected below all treatment units? ❑ ❑ U ❑
Is proper volume collected? ❑ ❑ • 0
Is the tubing clean? 0 0 • 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees ❑ ❑ U ❑
Celsius)?
Is the facility sampling performed as required by the permit(frequency,sampling type ❑ ❑ • 0
representative)?
Comment: The subject permit requires effluent grab samples. No discharges were reported from the
permitted outfalls during the review period.
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? • 0 0 0
Does the facility analyze process control parameters,for ex: MLSS, MCRT,Settleable ❑ ❑ • ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
Page# 4

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 08/05/2015 Inspection Type: Compliance Evaluation
Operations& Maintenance Yes No NA NE
Comment: Site grounds appeared to be well maintained.
The water level in Ash Basin#2 was significantly below the discharge outlet of the stop-log
tower. The metal walkway allowingaccess to the stop-log tower has been removed. The
concrete conveyance for Outfall 002 has been bermed to collect and return (via pumping
system)any accumulated water back into the ash basin. Ash in the ash stack is currently
being removed and transported (by contracted companies)to permitted landfills in Homer,
Georgia(10 loads per day) and at the Marshall Steam Station. Future disposal plans include
the utilization of the rail system to transport the ash to a permitted site in Moncure, North
Carolina.
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? • ODD
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: No discharges from the permitted outfalls were observed during the inspection.
Page# 5

WOKE Riverbend Steam Station
175 Steam Plant Rd
ENERGY® Mt.Holly,NC 28120
980-373-5697
CAROLI NAS RECEIVED/NCDENR/DWR
DEC - 8 2015
November 25, 2015
WORDS
North Carolina Department of Environment and Natural Resources MOOR ILLS REGIONAL OFFICE
Division of Water Resources
Information Processing Unit DEC 0
1617 Mail Service Center 1 2Q15
Raleigh, North Carolina 27699-1617 /tr,,,,,,._
tainn..._SEC rlaV
Subject: Duke Energy Carolinas, LLC
Riverbend Steam Station (NPDES Permit NC0004961)
Groundwater Quality Monitoring: Compliance Report Form Submittal
Enclosed is the completed Compliance Report Form (GW-59CCR)for the submittal of the October 2015
groundwater monitoring data from the Riverbend Steam Station ash basins 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 Tyler Hardin at 980-373-5697 or
[e-mail].
Sincerely,
Tyler Hardin
Groundwater and Water Programs
cc: Debra Watts

GROUNDWATER QUALITY MONITORING
COMPLIANCE REPORT FORM DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER QUALITY-INFORMATION PROCESSING UNIT
FACILITY INFORMATION Please Print Clearly or Type 1617 MAIL SERVICE CENTER,RALEIGH,NC 27699-1617 Phone:[phone]
Facility Name: Riverbend Steam Station Permit Type: NPDES Expiration Date: I 2/28/2015
Permit Name(if different): Duke Energy Carolinas,LLC i
PERMIT Number: NC0004961
Facility Address: 175 Steamplant Road
(Street) TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
Mt.Holly I NC I 28120 I County Gaston
(City) (State) (lip)
Contact Person: Steve Cahoon TelephoneR I 919-546-7457
Well Location/Site Name: Riverbend Ash Basin No.of wells to be sampled: I 12
(from Permit)
Monitoring Well Construction Information
Well ID Number(From Permit)
Units BG-1S BG-1D MG-35 MW-75R MW-7D MW-85 MW-81 MW-8D MW-11SR MW-11DR MW-14 MW-15 MW-9" MW-10" - MW-13" GWA-75 OB-1 OB-2
Well Depth [ft below land surface] ft 44.70 199.20 37.00 63.91 100.50 55.03 117.88 166.81 30.63 40.36 18.78 18.34 27.95 18.63 17.85 20.00 39.00 54.00
Measuring Point)toc)(ft above land surface) ft 3.02 3.34 1.76 3.01 2.18 2.46 2.25 2.08 2.80 2.62 1.89 3.24 2.91 2 37 2.30_ 3.17 3.00 2.99
Well Diameter in 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
Screen Top [ft below land surface) ft 29.70 194.20 22.00 43.91 95.50 35.03 97.88 156.81 15.63 35.36 3.78 3.34 12.95 3.63 2.85 5.00 33.00 48.00
Screen Bottom [ft below land surface] ft 44.70 199.20 37.00 63.91 100.50 55.03 117.88 166.81 30.63 40.36 18.78 18.34 27.95 18.63 17.85 20.00 39.00 54.00
Relative Measuring Point Elevation ft 704.22 701.12 672.13 765.95 765.15 755.40 754.74 756.03 693.30 693.18 662.84 657.12 651.84 654.37 654.11 689.24 749.02 723.10
Sampling Information and Field Analysis,__,.
CHECK IF DRY WELL AT TIME OF SAMPLING C DRY L DRY ❑ DRY [] DRY DRY "-
[� �DRY " DRV � DRY � DRY i� DRY �] DRY ,_ DRY LI DRY [] DRY [] DRY [] DRY [j DRY U DRY
I 15A-2L Units BG-1S BG-1D MG-3S MW-75R MW-7D MW-85 MW-El MW-8D MW-11SR MW-11DR MW-14 MW-15 MW-9". MW-10"" MW-13"" GWA-7S OB-1 OB-2
Sample Date 10/07/2015 10/07/2015 10/07/2015 10/07/2015 10/07/2015 10/07/2015 t0/07/2015 10/07/2015 10/06/2015 10/06/2015 10/06/20151 10/06/2015 10/06/2015 10/06/2015 10/06/2015 10/07/2015 10/07/2015 10/07/2015
Volume of Water pumped/bailed gal 4.40 21.30 3.70 8.00 17.75 4,60 10.55 2.30 2.25 5.25 2.50 2.65 13.50 3.85 2.60 NS NS NS
Temperature(00010) deg.C 16.3 16.7 17.3 17.0 16.0 15.7 - 15.8 15.9 17.0 17.2 17.6 17.4 15.8 17.0 17.5 NS NS NS
Odor(00085) None None None None None None None None None None None None None None None NS NS NS
Appearance Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal Normal NS NS NS
Turbidity(82078) NTU 7.5 13.8 1.42 2.51 4.57 9.6 26.2 11.9 1.75 1.2 3.96 4.67 3.95 6.97 4.38 NS NS NS
Dissolved Oxygen(00300) mg/L 7.24 1.12 0.88 6.54 7.82 8.1 10-3 8 11 1.46 1.11 0.64 1.93 3.18 0.54 0 35 NS NS NS
Oxidation Reduction Potential(00090) mV 380 -23 199 421 409 467 409 382 134 201 217 301 281 337 14/ NS NO NS
Specific Cond-field(00094) umhos/cm 23 1201 104 19 35 15 46 69 148 140 208 104 144 135 204 NS NS NO
Water Level[ft below measuring pt.](82546) ft 34.97 34.33 28.86 54.97 53.96 48.49 50.35 53.19 30.47 30.41 10.33 13.25 4.04 10.3 10.34 19.25 43.82 49.79
pH-field(00400) 6.5-8.5 SU 5.5 11.8 6.2 5.2 5.7 4.9 6.1 6.4 5.8 6.0 6-6 5.2 6.1 5.3 6.3 NS NS NS
Laboratory Information
Laboratory Name Duke Energy Analytical Laboratory Certification N Samples for metals were collected unfiltered: Q Yes No
Sample Analysis Date ! October 7-16,2015 I I NC DENR N 248 and field acidified: Yes No
I MAC' 15A-2L Units BG-15 BG-1D MG-35 MW-75R MW-70 MW-8S MW-8I MW-8D MW-115R MW-11DR MW-14 MW-15 MW-9"" MW-10"" MW-13"" GWA-7S OB-1 OB-2 -
TDS-Total Diss.Solids(70300) --- 500 mg/I 330 340 75 <25 25 <25 84 89 89 100 130 76 110 89 110 NS NS NS
CI-Chloride(00940) -- 250 mg/I 1.6 3-1 3.1 1.9 1.1 2.3 1 1 1.2 6.3 5.7 7.2 6.4 2.2 6.2 3.7 NS NS NS
As-Arsenic(01002) --- 10 ug/I <1 1.64 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 NS NS NS
504-Sulfate(00945) --- 250 mg/I 0.48 37 0.93 0.13 0.14 0.16 0 18 0.56 41 34 32 30 25 38 15 NS NS NS
Nitrate(NO3)as N(00620) --- 10 mg/I 0.07 <0.023 <0.023 0.03 <0.023 <0.023 <0,023 0.04 0.24 0.33 0.05 0.07 0.07 0.04 <0.023 NS NS NS
Cd-Cadmium(01027) --- 2 ug/l <1 <1 <1 <1 <I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 NS NS NS
Cr-Chromium(01034) --- 10 ug/I <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 6 <5 <5 <5 NS NS NS
Cu-Copper(01042) --- 1 _ mg/I <0.005 <0.005 <0.005 <0 005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005' <0.005' NS NS NS
Fe-Iron(01045) --- 300 ug/I 183 462 1070 70 35 172 1350_ 429 40 35 234 233 2481 298 22500 NS_ NS NS
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 <0.05f <0.05 NS NS NS
Mn-Manganese(01055) --- 50 ug/I 98 10 1150 25 <5 57 18 20 8 <5 99 23 9 59 8650 NS NS NS
Ni-Nickel(01067) --- 100 ug/I <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 NS NS NS
Pb-Lead(01051) --- 15 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <I <1 <1' <1 <1 NS NS NS
Zn-Zinc(01092) --- 1 mg/I 0.008 <0 005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 NS NS N5
Ba-Barium(01007) --- 700 ug/I 24 179 48 14 27 57 38 19 27 48 11 85 59 89 307 NS NS NS
B-Boron(01022) --- 700 ug/I <50 <50 <50 <50 <50 <50 <50 <50 412 302 <50 314 <50 409 78 NS NS NS
TI-Thallium(01059) 0.2 NE ugh <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2r 0.204' <0.2 <0.2" NS NS NS
Sb-Antimony(01097) 1 NE ug/I <1 2 14 1.03 <1 <1 <1 <1 <1 <1 <1r <1 <1 <1 <1r 1.05 NS NS NS
Se-Selenium(01147) --- 20 ug/I <1 <1 <1 <1 <1 <1 c1 <1 <I cll <1 1.52 <1 <1 <It NS NS NS
Alkalinity-(00410) --- NE mg/I 7.3 226 47.7 5.1 16.6 <5 21.8 31.7 14.2 19.8 55.2 <5 40 6.7 58.3 NS NS NS
Al-Aluminum(01105) --- NE ug/I 256 869 57 51 52 641 1120 845 472 89 240 245 203 385 183 NS NS NS
Be-Beryllium(01012) 4 NE ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 NS NS NS
HCO3-Bicarbonate(00440) --- NE mg/I 7.3 <5 47.7 5.1 16.6 <5 21.8 31.7 14.2 19.8 55.2 <5 40 6.7 58.3 NS NS NS
Ca-Calcium(00916) --- NE mg/I 0.826 38 9.89 0.274 2.51 0.209 2.31 4.24 10 8.68 7.34 3.54 12.2 /.42 9.46 NS NS NS
CO3-Carbonate(00445) --- NE mg/I <5 68.1 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 NS NS NS
Co-Cobalt(01037) 1 NE ug/l 1 08 <1 1.83 <1 <1 <1 <1 c1 <1 <1 <1 <1 <1 <1 21.5 NS NS NS
Mg-Magnesium(00927) --- NE mg/I 1.21 0.152 1.23 1 0.903 0.241 0.855 0.888 6.07 6.1 18 2.92 3.48 4.54 _4./2 NS NS NS
Mo-Molybdenum(01062) --- NE ug/I <1 10.8 <1 <1 <1 <1 <1 1.43 <1 <1 <1 <1 <1_ <1 <1 NS NS NS
K-Potassium(00937) --- NE mg/I 0 807 58.2 1.74 0.79 0.967 0.681 1 09 1.1 1.46 1.77 0.227 1.31 1.11 0.539 0.546 NS NS NS
Na-Sodium(82035) --- NE mg/I 1.37 48.5 7.85 1.21 3.29 1.37 7.51 9.69 7.81r 6.47 3.25 9.09 10.2 8.45 3.09r
NS NS NS
TSS-Total Susp.Solids(70031) --- NE mg/I <5 10 <5 <5 5 11 9 8 <5 <0 <5 <5 <5 5 <5 NS NS NS
V-Vanadium(01087) 0.3 NE ug/I 0 366 11.9 <0.3 <0.3 <0.3 <0.3 2.66 1.4 1.1 2.25 1.92 0.58 1.95 1.06 <0.3 NS NS NS
Sr-Strontium(01082) --- NE mg/I 0.011 1.74 0.108 <0.005 0.043 0.008 0.059 0.083 0.159 0.081 0.036 0.068 0.183 0.123 0084 NS NS NS
1 Turbidity isheld analysed for information use only
NE-Not Established BOLD values equal or exceed the corresponding 2L standard . Notes:
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 OWQ-coned laboratory. I am aware that there are significant Penalties for submitting tab?,information,including the possibility of fines
and imprisonment for knowing violations.
Ronnie Goodman,Supt.Operations/Riverbend ' • e I f a j,� /5
Permittee(or Authorized Agent)Name and Title-Please print or type Signature of Permittee(or Authorized Agent) Date
•
GW-59CCR 09/2015 1-The IMACs were issued in 2010,2011,and 2012;however NCDEQ has not established
a 2L for these constituents as described in 15A NCAC 02L.0202(c).For this reason,
IMACs noted on the report are for reference only.

Riverbend Steam Station
17IWP (E
ENERGY® Mt. Steam Holly,NC Clant 20
Mt. 28120
980-373-5697
CAROLI NAS RECEIVED/NCDENR/DWR
DEC - 8 2015
November 25, 2015
WQROS
North Carolina Department of Environment and Natural Resources MOOR ILLS REGIONAL OFFICE
Division of Water Resources V
Information Processing Unit DEC 0 2015 15
1617 Mail Service Center
Raleigh, North Carolina 27699-1617 li OWR�m
Subject: Duke Energy Carolinas, LLC
Riverbend Steam Station (NPDES Permit NC0004961)
Groundwater Quality Monitoring: Compliance Report Form Submittal
Enclosed is the completed Compliance Report Form (GW-59CCR)for the submittal of the October 2015
groundwater monitoring data from the Riverbend Steam Station ash basins 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 Tyler Hardin at 980-373-5697 or
[e-mail].
Sincerely,
03-161/
Tyler Hardin
Groundwater and Water Programs
cc: Debra Watts

Duke Energy
/ S Er:Vit €1t'31,.-:i r.�rcngr=:Ens
( _
526 nu`'11..>il.;ic;E'Street
Charlotte NC 282`)2
e.M .'+rr ;dams
€:-t`;K C 0 Box I C"t'6.
Cf"adn,the 'dG 'u.25 c106
November 9,2016
North Carolina Dept. of Environmental Quality
Attention: Central Files
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy Carolinas, LLC.
90 Day Closure of Wastewater treatment system
Riverbend Station (NC0004961)—Catawba County
Dear Mr. Chernikov,
In accordance with the requirements of Part III of NPDES wastewater permit NC0004961,Duke Energy is
hereby providing 90day notice of closure for Outfall 002A,Yard Sump Overflows,at Riverbend Station in Gaston
County, NC.
There is currently no flow to Yard Sump Outfall 002A.
All storm water for this drainage area has been rerouted to NPDES Stormwater Outfall SW018
(NCS000S49) in accordance to NCDEQ letter received 6/20/2016. The waste water(septic system)that
was flowing to this yard sump has been permanently grouted and is currently being pumped and
removed from the site on a weekly basis.
The inlet and outlet for the Yard Sump System was abandoned on November 9, 2016. The enclosure will
subsequently be cleaned and transported off site for proper disposal.
Please direct any correspondence or questions concerning the Riverbend Station NPDES Permitting and
Compliance to Brad Loveland @ 704-609-5637.
"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 ore significant penalties for submitting false information,including the possibility of fines and imprisonment for
knowing violations."
Sincerely,
.-. .---7
t‘z,/,
Tim Hill
GM CCP Regional Operations&Maintenance
CC: Brad Loveland
Rick Massey
Ronnie Goodman

Pitney, Andrew
Wednesday, March 08, 2017 10:15 AM
Bell, Wes
:0/Subject: FW: Riverbend Yard Sump Follow Up
Attachments: Yard Sump Closure.pdf
Fyi, part 2
From: Loveland, Brad P [mailto:[e-mail]]
Sent: Wednesday, March 08, 2017 10:14 AM
To: Pitner, Andrew<[e-mail]>
Subject: Riverbend Yard Sump Follow Up
Andrew,
Attached is the original request for closure at Riverbend.
Thanks,
Brad
"ir DUKE
ENERGY,
Brad Loveland, CPESC,CFM
EHS CCP- Permitting and Compliance
Environmental Health and Safety Department
526 South Church Street I EC13K I Charlotte, NC 28202
Office: 980 373 2820
Cell: 704 609 5637
1

PAT MCCRORY
DONALD R. VAN DER VAART
Sect eta
Water Resources S. JAY ZIMMERMAN
ENVIRONMENTAL QUALITY
Director
March 31, 2016
RECEIVEDINCDENRIDWR
Michael Ruhe 4 2016
Duke Energy Carolinas LLC WQROS
PO Box 1006 MOORESVILLE REGIONAL OFFICE
Charlotte, NC 28201-1006
Subject: NPDES Electronic Reporting Requirements and
Sixty Day Notice of Minor Modification of the NPDES Permit
Riverbend Steam Station
NPDES Permit Number: NC0004961
Dear NPDES Permittee:
The U.S. Environmental Protection Agency(EPA) recently published the National Pollutant Discharge
Elimination System (NPDES) Electronic Reporting Rule.The rule requires NPDES regulated facilities to
report information electronically, instead of filing written paper reports.The rule does not change what
information is required from facilities. It only changes the method by which information is provided (i.e.,
electronic rather than paper-based).
EPA is phasing in the requirements of the rule over a 5-year period. The two phases of the rule, and their
key milestones, are:
• Phase 1—Starting on December21,2016, regulated entities that are required to submit Discharge
Monitoring Reports (DMRs) will begin submitting these reports electronically, instead of on
paper. If you are currently reporting your DMR data electronically using eDMR,then you simply
need to continue reporting in the same way as you are now. The key change is that,starting on
December 21, 2016, electronic reporting of DMRs will be required, instead of voluntary.
• Phase 2—Starting on December 21,2020, regulated entities that are required to submit certain
other NPDES reports will begin submitting these reports electronically, instead of on paper.
Reports covered in the second phase include Notices of Intent to discharge in compliance with an
NPDES general permit, Sewer Overflow/Bypass Event Reports, and a number of other NPDES
program reports.
For more information on EPA's NPDES Electronic Reporting Rule,visit
http://www2.epa.gov/compliance/final-national-pollutant-discharge-elimination-system-npdes-
electronic-reporting-rule. For more information on electronic reporting to NC DWR,visit
http://deq.nc.gov/about/divisions/water-resources/edmr/npdes-electronic-reporting or contact Vanessa
Manuel at 919-807-6392 or via email at [e-mail].
State of North Carolina I Environmental Quality I Water Resources
1611 Mail service Center I Raleigh,North Carolina 27699-1611
919 707 9000

Sixty Days' Notice of Minor Modification of the Subject NPDES Permit
The NPDES Electronic Reporting Rule requires authorized NPDES programs to incorporate electronic
reporting requirements into NPDES permits beginning December 21, 2015. Under the new rule,the
electronic reporting process supersedes the paper reporting process outlined in your existing permit. To
bring your permit up-to-date with the new reporting requirements,this letter serves to notify you that in
sixty days your NPDES permit will be modified to incorporate the new electronic reporting requirements.
The modification will require electronic reporting in place of paper-based reporting. Electronic reporting
will be required beginning as indicated above for Phases 1 and 2 reporting. Please attach the enclosed
NPDES Permit Standard Conditions Part III—Addendum to your permit. This permit modification becomes
effective on July 1,2016.
All other terms and conditions in the original permit remain unchanged and in full effect. This
modification is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency
dated October 15, 2007.
If any parts contained in this modification are unacceptable to you,then you have the right to file a
petition for a contested case with the Office of Administrative Hearings within thirty(30) days following
receipt of this letter. This petition must conform to the requirements of Chapter 150E of the North
Carolina General Statutes. Petitions must be timely filed with the Office of Administrative Hearings, Post
Office Drawer 11666, Raleigh, North Carolina 27604. If you do not file a petition within the required time,
the agency decision shall be final and binding. If you have questions concerning this permit modification,
please contact Tom Belnick at telephone number 919-807-6390.
Sincerely,
Je f fre t' O. Pai..p rf-
forS.Jay Zimmerman, P.G.
Enclosure: NPDES Permit Standard Conditions Part III-Addendum
Cc: NPDES File
Central Files
•Aedetesdifi f l3nal Off ice/Water Quality Program

11C7'
PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Secretary
Water Resources S.JAY ZIMMERMAN
ENVIRONMENTAL QUALITY RECEIVE
D/NCDENR/Duff
March 24, 2016 Mk 8 2016
CERTIFIED MAIL 7013 2630 0001 8998 4483 WQROS
RETURN RECEIPT REQUESTED MOORESVILLE REGIONAL OFFICE
Mr. Harry K. Sideris, Senior Vice President-Environmental,Health& Safety
Duke Energy
526 South Church Street
Mail Code EC3XP
Charlotte,North Carolina 28202
SUBJECT: Modified Notice of Violation and Recommendation of Enforcement for Violations of
NCGS 143-215.1(a)—Unauthorized Discharge of Wastewater
NOV-2016-DV-0104
Duke Energy Carolinas, LLC—Riverbend Steam Station WWTP
NPDES Permit NC0004961
Gaston County
Dear Mr. Sideris:
On March 4, 2016,you were sent a notice of violation and recommendation of enforcement for violations of the
subject general statute resulting from unauthorized discharges of wastewater that occurred in the area of the
subject facility's coal ash basins prior to the effective date(March 1, 2016)of the recently renewed NPDES
permit. Since the date of the issuance of the NOV,Duke Energy Carolinas, LLC has contested the renewed
permit. As a result, its terms are no longer effective, including those in Sections A. (16.)and A. (21 —32.),that
provide permit coverage for the discharges from known seeps in the areas near the ash basins.
Accordingly, because permit coverage for the seeps has been relinquished as a result of the adjudication of the
permit,the terms of NOV-2016-DV-0104 are hereby modified in scope to be applicable to unauthorized
discharges occurring before, during or after March 1, 2016. All other terms of NOV-2016-DV-0104 remain in
effect as stated in the original document, except that you shall have thirty(30)days from your receipt of this
modified NOV to provide any explanation or mitigating information regarding the violations, due to the
modification of the content of the NOV.
Thank you for your prompt attention to this matter. If you have any questions about this letter,please contact
me at(919) 807-6309.
Sin erely,
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

NC.
PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Secretary
Water Resources S.JAY ZIMMERMAN
ENVIRONMENTAL QUALITY
Director
March 4, 2016
RECEIVED/NCDENR/DWR
CERTIFIED MAIL 7013 2630 0001 8998 4247 MAR 1 0 2 016
RETURN RECEIPT REQUESTED
WQROS
Mr.Harry K. Sideris, Senior Vice President-Environmental,Health& Safety MOORESVILLE REGIONAL OFFICE
Duke Energy
526 South Church Street
Mail Code EC3XP
Charlotte,North Carolina 28202
SUBJECT: Notice of Violation and Recommendation of Enforcement for Violations of
NCGS 143-215.1(a)—Unauthorized Discharge of Wastewater
NOV-2016-DV-0104
Duke Energy Carolinas, LLC—Riverbend Steam Station WWTP
NPDES Permit NC0004961
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 that until the effective date of the
subject facility's NPDES permit(March 1,2016),unauthorized discharges of wastewater occurred from the area
around the subject facility's coal ash basins. Please note that additional violations may be identified should
these discharges be found to have caused exceedances of water quality standards.
This letter is to advise you that the Division of Water Resources(DWR)is considering the issuance of civil
penalties to address these violations. If you have any explanation or mitigating information that you wish to
present that may be considered during the determination of any civil penalty assessment,you are requested to
present such materials to DWR within thirty(30)days of your receipt of this letter. Please send your response
to the attention of Bob Sledge at the letterhead address.
Thank you for your prompt attention to this matter. If you have any questions about this letter,please contact
me at(919) 807-6309.
Sincerely,
Jeffrey O. Poupart
Water Quality Permitting Section Chief
cc: - -_ —Water Quality Regional Operations
NPDES Compliance/Enforcement Files
Central Files
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919-707-9000

KE Harry K.Sideris
p Senior Vice President
ENERGY. Environmental,Health&Safety
526 S. Church Street
RECEIVED/NCDENR/DWR Mail Code:EC3XP
Charlotte, NC 28202
J U N 2 6 2015 [phone]
June 22, 2015 WQROS
MOORESVILLE REGIONAL OFFICE
Mr. Jeffrey Poupart, Section Chief
NC Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Riverbend Steam Plant—Retired
Notification of proposed pumping activity
NC0004961
Gaston County
Dear Mr. Poupart,
As discussed during the meeting between Division of Water Resources staff and Duke Energy
(Duke) staff on June 3, 2015, this letter is intended to provide details as to the necessary
pumping operations at the subject facility.
Riverbend Steam Station (Riverbend), has three registered dams (GASTO-097, -098, -099).
Potential failure mode analyses (PFMA) has been performed on all three dams. As the water
level continues to drop, a number of logistical concerns with the access walkway and platform,
as well as the riser structure of the secondary basin itself have become apparent.
Engineering analysis has already started to evaluate the structural stability of the riser from the
secondary basin to Mountain Island Lake under seismic and high wind loads as the water level in
the basin continues to decrease. Additionally, as the pond level decreases, the access walkway(a
floating gangway) is becoming steeper, requiring additional engineering analysis to design a
modified access staircase and walkway to maintain OSHA compliance.
Riverbend is also moving towards ash basin closure and demolishing the plant infrastructure
within the next few years. Part of this work includes the dewatering plans, for which pumping
basin water through the riser structure adds additional engineering concerns and associated risks.
It is currently proposed as part of the dewatering plan, to have the pump outlet pipes positioned
over the riser wall and attached inside the riser structure. During the implementation of these
activities there is increased risk of damaging the riser structure and ultimately damaging the
outlet pipe.
The activities listed above have risks associated with them to potentially impact the riser
structure or outlet pipe during the implementation process due to additional loads on the riser
structure and increased flows through the outlet pipe in the case of dewatering. Duke believes
the best alternative to mitigate these risks is to properly abandon the outfall pipe and riser
structure from the secondary basin to Mountain Island lake. This will mitigate risks associated

. Jeff Poupart
Riverbend pumping approval request
June 22, 2015
with safety of the riser and/or pipe. This activity will also require the use of pumps to continue
the removal of water from the basin.
Duke proposes to stage portable pumps onsite to remove water as necessary. Specifically, the
pumps would move water over the crest of the dam with an outlet to the same location where the
outfall pipe originally discharged down the concrete flume to the existing NPDES outfall. All
required sampling and reporting of water removed from the basin would continue as part of this
activity. Engineered plans would be created to assure the pipe is grouted and abandoned
properly, as well as any work that would be required to properly abandon the riser structure. A
full engineering analysis for the pumps required would be completed, as well as a pump
operating plan and safety contingency plan, to assure safe operation.
Duke hereby requests confirmation with this proposal to use pumps to remove water from the
basin at Riverbend. Duke understands that all permit conditions related to monitoring and
compliance would be in place and that no contravention of instream water quality standards
would be allowed as a result of this activity. Duke believes that this would be the safest
alternative, removing additional loads on the riser and pipe that could occur during
implementation and construction related activities.
Given the company's statutory requirement to close these treatment basins within an aggressive
timeframe while maintaining a safe, reliable source of electricity for our customers, we request
your confirmation of this proposal so that further progress can be made towards the statutory
requirements. If you have any questions regarding this letter, please contact Mr. Shannon
Langley at [phone] or [e-mail].
Sincerely,
. Sideris
Senior Vice President
Environmental, Health & Safety
cc: %/Mike Parker DWR Mooresville Regional office
Tina Woodward—EC13
Shannon Langley—NCRH 14th floor

WrDUKE Duke Energy
Riverbend Steam Station
ENERGY®
175 Steam Plant Road
Mount Holly NC 28120
REC !/!'rj: ..
Nov. 24, 2014 DIVIStoN C.- QUALITY
DEC 8 2014
State of North Carolina
Department of Environment and Natural Resources
MOOR ;1 OFFICE
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
RE: Duke Energy Carolinas, LLC.
Riverbend Steam Station
Groundwater Monitoring Report—Compliance Report Form
Please find attached the completed Groundwater Compliance report Form (GW-59CCR)for the
Riverbend Steam Station ash basin (NPDES Permit#NC0004987).
As required by the GW-59CCR form, parameters exceeding the generic standards published in 15A NCAC
02L.0202 (g-h) have been bolded. However, per 15A NCAC 02L.0202(b)where naturally occurring
substances exceed 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 accurracy of approved analytical
methods used to measure parameters.
If you have any questions regarding this report please contact me at(919) 546-7457 or
[e-mail].
Sincer ly
ephen G. Cahoon
Sr. Environmental Specialist RECEIVED
Duke Energy Environmental Services Department
NOV 2 6 2014
Cc:Debra Watts DWR SECTION
JFORMATION PROCESSING UNIT
Enclosure

GROUNDWATER QUALITY MONITORING: Mail original DEPARTMENT OF ENVIRONMENT&NATURAL RESOURCES
COMPLIANCE REPORT FORM and 1 copy DIVISION OF WATER QUALITY-INFORMATION PROCESSING UNIT
to: 1617 MAIL SERVICE CENTER,RALEIGH,NC 27699-1617 Phone:[phone]
FACILITY INFORMATION Please Print Clearly or Type
Facility Name: Riverbend Steam Station Permit Type: NPDES Expiration Date: 2/28/2015
Permit Name(if different): Duke Energy Carolinas,LLC PERMIT Number: NC0004961
Facility Address: 175 Steamplant Road
(Street) TYPE OF PERMITTED OPERATION BEING MONITORED Ash Impoundment Groundwater
Mt.Holly NC 28120 I County Gaston
(City) (State) (Zip)
Contact Person: Steve Cahoon Telephone# [phone]
Well Location/Site Name: Riverbend Ash Basin No.of wells to be sampled: 12
(from Permit)
Monitoring Well Construction Information
Well ID Number(From Permit)
Units MW-7SR MW-7D MW-85 MW-81 MW-8D MW-11SR MW-11DR MW-14 MW-15 MW- MW- MW- MW- MW- MW- MW- MW- MW-
Well Depth [ft below land surface] ft 63.91 100.50 55.03 117.88 166.81 30.63 40.36 18.78 18.34
Measuring Point(toc)[ft above land surface] ft 3.01 2.18 2.46 2.25 2.08 2.80 2.62 1.89 3.24
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 43.91 95.50 35.03 97.88 156.81 15.63 35.36 3.78 3.34
Screen Bottom [ft below land surface] ft 63.91 100.50 55.03 117.88 166.81 30.63 40.36 18.78 18.34
Relative Measuring Point Elevation ft 765.95 765.15 755.40 754.74 756.03 693.30 693.18 662.84 657.12
Sampling Information and Field Analysis
CHECK IF DRY WELL AT TIME OF SAMPLING L] DRY ❑ DRY ❑ DRY [] DRY L DRY L] DRY ❑ DRY ❑ DRY ❑ DRY ❑ DRY ❑ DRY L] DRY ❑ DRY ❑ DRY ❑ DRY ❑ DRY ❑ DRY ❑ DRY
15A-2L Units MW-7SR MW-7D MW-85 MW-81 MW-8D MW-11SR MW-11DR MW-14 MW-15 MW- MW- MW- MW- MW- MW- MW- MW- MW-
Sample Date 10/06/2014 10/06/2014 10/06/2014 10/06/2014 10/06/2014 10/06/2014 10/03/2014 10/06/2014 10/06/2014
Water Level[ft below measuring pt.](82546) ft 51.35 50.46 43.51 45.44 48.13 26.96 26.84 8.57 13.53
Volume of Water pumped/bailed gal 8.25 15.50 7.75 8.50 23.05 2.30 7.95 0.65 3.65
Temperature(00010) deg.C 15.9 15.8 16.2 15.8 15.7 17.3 17.4 17.0 16.9
Odor(00085) None None None None None None None None None _
Appearance Normal Normal Normal Colloidal Colloidal Normal Normal Normal Normal
Turbidity(82078) NTU 3.2 3.3 2.7 43.2 72.4 5.4 1.7 6.5 2.5
Dissoved Oxygen(00300) mg/L 6.4 8.1 7.4 10.4 8.1 0.9 1.1 0.4 2.1
Oxidation Reduction Potential(00090) mV 384 369 391 341 343 59 151 298 131
Specific Cond-field(00094) umhos/cm 20 38 21 48 74 148 148 199 101
pH-field(00400) 6.5-8.5 SU 5.1 5.6 4.8 6.0 6.3 5.7 5.7 6.6 5.1
Laboratory nformation
Laboratory Name Duke Energy Analytical Laboratory Certification# NC DENR ff 248 Samples for metals were collected unfiltered: E Yes ❑ No
Sample Analysis Date October 7-14,2014 and field acidified: E Yes ❑ No
15A-2L Units MW-7SR MW-7D MW-85 MW-81 MW-8D MW-11SR MW-11DR MW-14 MW-15 MW- MW- MW- MW- MW- MW- MW- MW- MW-
Sb-Antimony(01097) 1 ugh' <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 13 26 58 43 35 25 63 11 79
B-Boron(01022) 700 ug/I <50 <50 <50 <50 <50 346 342 <50 295
Cd-Cadmium(01027) 2 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
CI-Chloride(00940) 250 mg/I 2 1.2 3.5 1.2 1.3 6.5 6.4 7.3 6.7
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 <0.005 0.007 <0.005 <0.005 <0.005 <0.005 <0.005
Fe-Iron(01045) 300 ug/I 110 26 14 2460 2750 109 24 472 465
Pb-Lead(01051) 15 ug/I <1 <1 <1 <1 <1 <1 <1 <1 <1
Mn-Manganese(01055) 50 ug/I 31 <5 64 44 74 10 18 90 53
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 <5
Nitrate(NO3)as N(00620) 10 mg/I <0.023 <0.023 <0.023 <0.023 0.03 0.17 0.21 <0.023 0.06
Se-Selenium(01147) 20 ug/I <1 <1 <1 <1 <1 <1 <1 <1 1.78
SO,-Sulfate(00945) 250 mg/I 0.14 0.16 0.19 0.21 0.56 41 41 27 28
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 <25 34 <25 91 110 98 98 130 71
Zn-Zinc(01092) 1 mg/I <0.005 <0.005 <0.005 0.008 0.009 <0.005 <0.005 <0.005 <0.005
Al-Aluminum(01105) --- ug/I NA NA NA NA NA NA NA NA NA
Turbidity is field analyzed for information use only.
BOLD values equal or exceed the corresponding 2L standard Notes:
certify that,to the best of my knowledge and belief,the information submitted in this report is true,accurate,and complete,and that the laboratory analytical data was produ.-d using approved methods of analysis by a DWQ-certified laboratory. I am aware that there are significant penalties for submitting false information,including the
.ossibility of fines and imprisonment for knowing violations. /
Robert L. Drum/Mgr. Production Level II G • /l 7Q �
Permittee(or Authorized Agent)Name and Title-Please print or type Signature of Permittee(or Authorized Agent) / Date
GW-59CCR 06/2014

Alive A
NCDENR
North Carolina Department of Environment and Natural Resources
i
Pat McCrory John E. Skvarla, III
,
Governor Secretary
r.,
August 12,2014
ic
CERTIFIED MAIL 7002 0860 0006 5836 0328
RETURN RECEIPT REQUESTED
Allen Stowe
4' Duke Energy
'1.' 526 South Church Street
Charlotte,NC 28202
Subject: NPDES Wastewater Permit Application 'ice
Permit NC0004961 „°"
Additional Information Request
Riverbend Steam Station,Gaston County
i.:"'.,
Dear Mr. Stowe:
The Division of Water Resources(Division)has reviewed your application for the renewal of the subject
permit.The Division requests additional information that is necessary to process the permit renewal application. The
Division's current understanding is that Duke Energy is planning to remove the Coal Combustion Residuals (CCR)
from this site.This process would require the establishment of a location where excavated CCR will be dewatered
prior to being loaded on trucks or rail cars.The Division is required to evaluate the water quality impacts of the water
P.
that will be drained from the CCR on the receiving stream and also establish an outfall for this new wastewater
source.Therefore, the Division requests the following information:
.' 1) Location of the loading/dewatering site
2) Projected volume of ash that will be processed through this site
f 3) Projected volume of wastewater generated on this site
4) Chemical characterization of the wastewater generated on this site. The wastewater should be analyzed for the
g.
following parameters: CI,F, SO4,Hg(Method 1631E),Al, Ba, B,Fe,Mn,Zn,Sb, As,Cd,Cr,Cu,Pb,Mo,
t .--.
Ni, Se,Tl,pH,TDS,TSS,Temperature,and Specific Conductance.
5) Location of the outfall for this wastewater, including latitude and longitude and topographic map. ,.7
Alternatively,the facility can use the existing outfall 002 for the wastewater discharge. However,this new .
waste stream shall be sampled prior to its mixing with the existing flow in the concrete conveyance that is used
for outfall 002.
If you have any questions about this request,please contact Sergei Chernikov at the following e-mail address: : ,
[e-mail],or telephone number: 919-807-6386.
Sincere ,
s
Thomas . Reeder
Directgr,Division of Water Resources •
cc: Jason Allen,Duke Energy 11''
FI' NPDES Files `
I$. EPA Region IV (e-copy)
, Winston-Salem Regional Office/Water Quality(e-copy)
1617 Mail Service Center,Raleigh,North Carolina 27699-1617 G'
Phone:[phone]\Internet:www.ncwaterquasty.org
An Equal Opportunity 1 Affirmative Action Employer-Made in part by recycled paper
-,giro r

DUKEEnvironmental Services
V
Duke Energy
ENERGY®
RECEIVED 526 South Church Street
DIVISION OF We =2 QUALITY > Charlotte,NC 28202
Mailing Address:
AUG 4 2014 Mail Code EC13K/P.O.Box 1006
Charlotte,NC 28201-1006
Sli P SaC'l ION
MOORESVILLE REGIONAL OFFICE
July 24, 2014
RECEIVED
JUL 2 5 2014
NC Dept of Environment and Natural Resources
Attention: Central Files CENTRAL FILES
Division of Water Resources DWQ!BOG
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy Carolinas, LLC ELC
NPDES Discharge Monitoring Report for: JUL 2 8 2W 4
Allen Steam Station — NC0004979 — Gaston County
Belews Creek Steam Station — NC0024406— Stokes County
Buck Steam Station — NC0004774 — Rowan County
Cliffside Steam Station — NC0005088 — Rutherford County
Dan River Combined Cycle Station — NC0003468— Rockingham County
Lincoln Combustion Turbine Station — NC0080781 — Lincoln County
Marshall Steam Station — NC0004987—Catawba County
Riverbend Steam Station — c:.04961044Gaston County
Rockingham Cty Combustion Turbine Facility— NC0086665 — Rockingham County
In accordance with Part II, D(2) of the above referenced NPDES permits, the original and one
copy of the monthly monitoring reports for June 2014 are attached.
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,
A., � QA
S. Velte • JUL 'i 0 2014
Manager— NPDES Compliance
Attachments
/phs

EFFLUENT
NO. NC0004961 DISCHARGE NO. 001 MONTH June YEAR 2014
AME Riverbend Steam Station CLASS I COUNTY Gaston
TOR IN RESPONSIBLE CHARGE (ORC) Donna L.Burrell GRADE I PHONE [phone]
or
RTIFIED LABORATORIES (1) Duke Power Env.Services 248 (2)
CHECK BOX IF ORC HAS CHANGED I I PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL and ONE COPY to:
NGDENR/DIVISION EOFN WATER QUALITY '. �`�a
WATER QUALITY SECTION (��6— �'/ jJ
ATTENTION:CENTRAL FILES X I Ldai Ii
1617 MAIL SERVICE CENTER (SIGNATURE OF OPERATOR IN RESPONSIBLE CHARGE) DTE
RALEIGH,NC 27699-1617
By this signature,I certify that this report is accurate and complete to the best of my knowledge.
UW 50050 nullnoncoon
OJ 2 w FLOW m 5 �w Effluent Limit per EPA Nomograph o
a o ¢1- m EFF X itl m u IF U<36.5°,EL=50°; m A m m m
w ¢O�o Oin z �� H If U>55°,EL=WA; myG rnm...
<z 0 INF t m p m IF 36.5°<=U<=55°,EL=2°U-23°; m c A m"E
o <.. .0 0 f0�cE di W CC Yid . o,a IF Multiple Control System Operational .1 3 n ¢' J
a M O 0 ¢< R d m m EL=N/A 8 d o°
sH
HRS HRS Y/N MGD °F °F °F °F °F
2 0700 8 Y No Flow — -- N/A - no flow — 89.6 ----
4 0700 8 Y No Flow --- — N/A - no flow ---- 89.6 ----
6 0700 8 Y No Flow — -- N/A - no flow --- 89.6 ----
8 N No Flow — — N/A - no flow — 89.6 ,-11111111.11
10 0700 8 Y No Flow — — N/A - no flow — 89.6 _111-__Illr-
12 0700 8 Y No Flow -- — N/A - no flow -- 89.6 _11M11
14 N No Flow — — N/A - no flow — 89.6 ----
16 0700 8 Y No Flow — — N/A - no flow -- 89.6 —11111111—_
18 0700 8 Y No Flow --- -- N/A - no flow --- 89.6 _-_,mura`��
20 0700 8 Y No Flow -- — N/A - no flow — 89.6 _!!!!:1111k111101—
22 N No Flow -- --- N/A - no flow — 89.6 __11g11111
24 0700 8 Y No Flow — — N/A - no flow — 89.6 ----
26 N No Flow — — N/A - no flow — 89.6 ----
28 N No Flow -- --- N/A - no flow — 89.6 WPM
-
30 0700 8 Y No Flow — -- N/A - no flow — 89.6 —`ET —
Average 0.0 0.0 0.0 0.0 —E
Maximum
Minimum 0.0 0.0 0.0 0.0 ----
Comp.(C)/Grab(G)
Monthly Limit — — 95 --
Facility Status:(Please check one of the following) DEM Form MR-1(8/94)
All monitoring data and sampling frequencies meet permit requirements 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.'
�1
Issa J.Zarzar rViiSG' 7 Z//4/
Permittee(Please print or type) Signature of Permittee'° Date /
175 Steamplant Rd.Mt.Holly,NC 28120 704-263-3202 2/28/2015
Permittee Address Phone Number Permit Exp.Date
'ORC must visit facility and document visitation of facility as required per 15A NCAC BA.0202(b)(5)(B).
"If signed by other than the permittee,delegation of signatory authority must be on file with the state per 15A NCAC 2B.0506(b)(2)(D).
"'Multiple Systems Operating
The monthly average for fecal coliform is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting data.

EFFLUENT
MIT NO. NC0004961 DISCHARGE NO. 002 MONTH June YEAR 2014
Y NAME Riverbend Steam Station CLASS I COUNTY Gaston
ERATOR IN RESPONSIBLE CHARGE (ORC) Donna L.Burrell GRADE I PHONE [phone]
CERTIFIED LABORATORIES (1) Duke Power Env.Services-248 (2)
CHECK BOX IF ORC HAS CHANGED I PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL and ONE COPY to:
NCDENR/DIVISION OF WATER QUALITY �(\
WATER QUALITY SECTION \, _ /'� 1/ II
IL(
ATTENTION:CENTRAL FILES X �r'�e a1J�1'JWW���� 0
1617LMMAIIL SE VIIC7EG9C0E7617R (SIGNATURE OF OPERATOR IN RESPONSIBLE CHARGE) DATE
By this signature,I certify that this report is accurate and complete to the best of my knowledge.
Q Y 50050 00400 00530 00556 01042 01045 01002 01147 00600 00665 1G636
>O w
¢¢ W C FLOW v E o 2, F
¢0 2F m EFF X O = - m o _ O
W ¢o Q m Z w m n - r `w ? r
a OrN z 0 INF . �O c7 ci - a o
C' qaw �O ¢ >-to Anson m m F = a m a - 0
Lu O.H Q Q o 1 o O r°- �- 1-. i- c _ w
HRS HRS Y/N MGD SU mg/I mg/ mg/I mg/I ugh ugh mg/I mg/I PiF ng/I
2 0700 8 Y --- -------
4 0700 8 Y ------------I
6 0700 0 Y No Flow --------_---
8 __ N ---_---------
10 0700 8 Y ---- --------
12 0700 8 Y -- —'_UM---_■---
14 N 11_\ I 1 .��IEWA
16 0700 '. Y --.___I]_M'__ ,_.----
1e 0700 8 ME MIMI 111_—id ini=
20 0700 0 Y No Flow —Sa---,_-----_
22 N ■mil!i._, �
24 0700 0 Y IIMINIMNI
26 __ N --------_----
28 __ N -------------
30 0700 8 0 ----_-------
Average 0.0 ------�_
Maximum
Minimum ----------
Comp.(C)/Grab(G)
Monthly Limit 6.0-9.0 23.0 11.0 1.0 1.0 — -- — 10
Facility Status:(Please check one of the following) DEM Form MR-1(8/94)
All monitoring data and sampling frequencies meet permit requirements Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements I I Noncompliant See Attachment
'I certify,under penalty of law,that this document and all attachments were prepared under my direction or supervision in accordance with a system 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.` p, /
Isla J.Zarzar �� C�`./ /1-1, 'YL / Z
Permittee(Please print or type) Si nature of Permittee" Dat
175 Steamplant Rd.Mt.Holly,NC 28120 704-263-3202 2/28/2015
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 28.0506(b)(2)(D).
"'Multiple Systems Operating
The monthly average for fecal coliform is to be reported as a GEOMETRIC mean. Use only units designated in the reporting facility's permit for reporting data.

EFFLUENT
MIT NO. NC0004961 DISCHARGE NO. 002A MONTH June YEAR 2014
Y NAME Riverbend Steam Station CLASS I COUNTY Gaston
ERATOR IN RESPONSIBLE CHARGE (ORC) Donna L.Burrell GRADE I PHONE [phone]
CERTIFIED LABORATORIES (1) Duke Power Env.Services-248 (2)
CHECK BOX IF ORC HAS CHANGED n PERSON(S)COLLECTING SAMPLES Staff
Mail ORIGINAL and ONE COPY to:
NCDENR/DIVISION OF WATER QUALITY
WATER QUALITY SECTION ,]^
_\�,� ` n, ,/'�'�`� „
ATTENTION:CENTRAL FILES X - �!- '�- c ... '\", V f /V 621 I LI
1617 MAIL SERVICE CENTER (SIGNATURE OF OPERATOR IN RESPONSIBLE CHARGE) DATE
RALEIGH,NC 27699-1617
By this signature,I certify that this report is accurate and complete to the best of my knowledge.
4 Y 50050 00400 00530 31616 00552 01042 01045
W
- w F FLOWix ton E
QO QH t ti
w 2 0 O N z EFF X 9 ,�
a a ag O O INF a v U 0 A 0 17,
IL CC H m ro=
a O O J~ m m O F=
O~ o m H LL
HRS HRS Y/N MGD SU mg/I #/looml mg/I mg/I mg/I
2 0700 8 Q No Flow ------------
4 0700 8 Q No Flow IIIM
6 0700 8 Q No Flow NI= I
a __© No Flow -----®P._®,_1_'.MEI
10 0700 8 Y No Flow —®—_'--®-MMI-_I®_
12 0700 8 Q No Flow —BIM_,—.' ii'—MM—®-
14 __ N No Flow --1111=—1_MI-®,_----
16 0700 0 Y No Flow --N__iI�®®--®--
16 0700 8 © No Flow --MM
—®®®�--®-
20 0700 0 Y No Flow _---®®®--®--
22 __ N No Flow -----®---I_■IME
24 0700 0 Y No Flow I 4.1 M
26 __ N No Flow ------------
2e __ N No Flow ------®----®
ao 0700 KE Y No Flow ---------��—
Average 0.0 ------®-�®—
Maximum
Minimum -------------
Comp.(C)/Grab(G)
Monthly Limit 23.0 11.0 1.0 1.0
Facility Status:(Please check one of the following) DEM Form MR-1(8/94)
All monitoring data and sampling frequencies meet permit requirements Compliant
All monitoring data and sampling frequencies do NOT meet permit requirements I ( Noncompliant See Attachment
'I certify,under penalty of law,that this document and all attachments were prepared under my direction or supervision in accordance with a system 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." efedi-'42/244"--v-
•
lass J.Zarzar /i 774
Permittee(Please print or type) Signature of Permittee" Date
175 Steamplant Rd.Mt.Holly,NC 28120 704-263-3202 2/28/2015
Permittee Address Phone Number Permit Exp.Date
`ORC must visit facility and document visitation of facility as required per 15A NCAC BA.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 28.0506(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.

rwrre®®
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. Skvarla, III
Governor Secretary
NOTICE OF DEFICIENCY
June 13, 2014
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Duke Energy Corporation 7011 1570 0000 0154 7371
Attention: Mr. Sean DeNeale,Engineer II
Environmental Services
Post Office Box 1006
Mail Code EC 13K
Charlotte,North Carolina 28201-1006
Duke Energy Corporation 7011 1570 0000 0154 7388
Attention: Mr. John Elnitsky, Vice President
Project Management and Construction
Post Office Box 1007
Mail Code ST-28U
Charlotte,North Carolina 28201-1007
RE: Riverbend Ash Basin Dam 2 (Secondary)
GASTO-098—High Hazard Potential
Catawba River Basin
Gaston County
Dear Mr. DeNeale and Mr. Elnitsky:
The "Dam Safety Law of 1967," as amended, provides for the certification and inspection of dams in the
interest of public health, safety, and welfare, in order to reduce the risk of failure of such dams; to prevent
injuries to persons, damage to property; and to insure the maintenance of stream flows.
Our records indicate that you are the owner/and or responsible for the referenced dam, which is located off
NC Highway 16 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 a corrugated metal pipe barrel.
A preliminary review of the camera inspection video of the decant structure and field report has been
performed by personnel of the Land Quality Section forPhe referenced dam. The video documented water.
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 Riverbend Ash Basin Dam 2 (Secondary)
June 13, 2014 GASTO-098
Page 2 of 2
spurting under pressure in the CMP barrel at the 182.8 feet observation point and is listed in the report as an
infiltration runner. Other areas of staining and weeping were observed.
The condition of the barrel appears serious and to justify further engineering study to determine appropriate
remedial measures. Your dam is categorized as a "High Hazard" dam. In the event of dam failure,
significant environmental damage to Mountain Island Lake 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 assessment 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 darn 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 darn safety staff at (919) 707-9220. All plans, specifications design data, and
calculations must be submitted to the State Dam Safety Engineer. If you have any questions regarding this
letter, please contact me at(704) 663-1699. Your cooperation and consideration in maintaining a safe darn is
appreciated.
Sincerely,
epz.k ..5° -
Zahid S. Khan, CPM, CPESC, CPSWQ
Regional Engineer
Land Quality Section
ec: Steven M. McEvoy, PE, State Dam Safety Engineer

RECEIVED
DIVISION OF'PATER QUALITY
DUKEEnvironmental Services
tis
MAR 2 4 2014 Duke Energy
ENERGY. 526 South Church Street
S'i• i . ! Charlotte,NC 28202
MOORESVILL' r ECiONAL OFFICE
Mailing Address:
Mail Code EC13K/P.O.Box 1006
Charlotte,NC 28201-1006
March 21, 2014
North Carolina Department of Environment
and Natural Resources
Division of Water Resources
Water Quality Program
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy Carolinas, LLC
Riverbend Steam Station
NPDES Permit No. NC0004961
Ash Pond Transfer Canal Pipe - Unwatering Project
Attention: Mr. Thomas A. Reeder, Director
Dear Mr. Reeder:
This letter is in reference to a request from Mr. Steven McEvoy to Mr. John Elnitsky of Duke
Energy [dated March 5, 2014] requesting information relating to the Company's ash pond
decant structures in North Carolina. The letter specifically requested that we provide a schedule
for completing and reporting results from camera inspections of decant structures containing
Corrugated Metal Pipe (CMP) or concrete pipe. Mr. Elnitsky responded to Mr. McEvoy in a
letter dated March 14, 2014 with an inventory and status of the Company's subject pipes. Our
purpose with this letter is to inform you of Duke Energy's interest in beginning this work,
specifically at the Riverbend Steam Station, as soon as next week. The project will involve
temporarily unwatering a section of pipe and all activity will be confined to the immediate area of
the pipe between the ash basins. We believe that our proposed activities will not require
NPDES permit modifications or other water permitting actions, but please advise if you have
concerns.
The ash pond facilities to be inspected at the Riverbend station consist of two ash settling
ponds, referred to in this plan as the primary and secondary pond. The pipe to be inspected is
NCDENR designation GASTO-099: Ash Basin Intermediate Dam, 36" RCP(reinforced concrete
i e with stoplogdischarge. This pipe transmits flow from the primaryand to the secondary
9 pp p
pond. The length of the pipe is approximately 150 feet. The primary pond contains a concrete
intake structure (or intake tower) connected to the pond bank via a 50-foot walkway. From the
intake tower the 36" discharge pipe extends approximately 150 feet underneath the pond bank
to a 25-foot earthen channel, which is connected to the secondary pond. The earthen channel
is approximately 25-feet wide and contains approximately 30 feet of concrete rip-rap on either

side of the channel bank which extends from the pipe outfall, approximately 30 feet
downstream.
The following sequence of construction summarizes the specific tasks, in order, which must be
performed to complete the inspection.
1. Install stop logs and raise elevation in intake structure to stop flow.
2. Install supersack sand bag cofferdam in discharge channel (leading to secondary
pond), beyond the end of the rip rap embankment (approximately 30 feet from pipe
outfall.)
3. Pump water over the cofferdam into secondary pond to unwater section of channel
where discharge pipe outfalls.
4. Construct small scaffold platform immediately adjacent to discharge pipe outfall for
pipe inspection contractor.
5. Flush sediment from discharge pipe.
6. Pipe inspection with CCTV equipment.
7. Perform inspection of intake tower and discharge pipe inlet at intake tower.
8. After completion of inspections of the discharge pipe and intake tower, remove
temporary scaffold platform.
9. Remove temporary cofferdam from discharge channel.
10. Remove stop logs from intake tower in primary pond.
[Note: All work will be performed by Crowder Construction or a pipe inspection contractor].
Staging areas for work equipment are adjacent to both the intake structure and discharge pipe
and are accessible via a combination of paved, dirt, and gravel roads. It is anticipated that the
proposed work can be completed in one day. Facility staff at the Riverbend Station will need at
least two days' notice prior to commencing work.
If you have any questions or concerns regarding our proposed course of action, please contact
me at [phone] or by e-mail at [e-mail].
Sincerely,
()/Crik,v _ S . \/ �
John Velte, Manager
NPDES Compliance
Environmental Services, Water & Natural Resources
xc: Mr. Michael Parker— Division of Water Resources— Mooresville Regional Office
Mr. Zahid Khan — Division of Energy, Mineral & Land Resources— Mooresville Regional
Office
Mr. Jeffrey Poupart— Division of Water Resources— Raleigh Central Office
Mr. Steve McEvoy, PE—Division of Energy, Mineral & Land Resources— Raleigh
Central Office

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Water Quality Regional Operations Section
Pat McCrory Thomas Reeder John E. Skvarla, Ill
Governor Director Secretary
TO: File
FROM: M. Allocc
DATE: November 8, 2013
SUBJECT: Riverbend Steam Station —Septic Tank Overflow Report
Mr. Allen Stowe called to discuss the reporting requirement for an issue with on-site septic tank that
occurred on October 9, 2013. During normal operation the septic tank effluent is discharged to the on-site
coal ash basins with eventual discharge through Outfall 002 under NC0004961. On the date in question
the septic tank overflowed due a blockage, related to reduced use since the plant has been shut down.
The overflow was contained within a pit and did not reach the ground surface or surface waters. Stanly
Septic was contracted and the blockage cleared to allow proper treatment and discharge to the coal ash
basins; all contained water was pumped back into the septic tank. I chatted with Allen and discussed
reporting requirements if the spill had reached the ground surface or surface waters; applicable to sanitary
sewer overflows. Since the spill was contained and properly treated I did not feel that reporting to DWR
was needed; this memo documents that conclusion.
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115 One
Phone:[phone]\Fax:[phone]\Customer Service:1-877-623-6748 NorthCJarolina
Internet:http:llportal.ncdenr.org/web(wq Naturally Equal Opportunity\Affirmative Action Employer—50%Recycled/10%Post Consumer paper

A •.A
NCDENR FILE
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Water Quality Programs
Pat McCrory Thomas A. Reeder John E.Skvarla, Ill
Governor Director Secretary
September 12,2013
Mr. Allen Stowe, Water Management
Duke Energy Corporation
Post Office Box 1006/EC13K
Charlotte,North Carolina 28201-1006
Subject: Compliance Evaluation Inspection
Riverbend Steam Station
NPDES Permit No. NC0004961
Gaston County
Dear Mr. Stowe:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the
subject facility on September 6,2013 by Mr. Wes Bell of this Office. Please inform the facility's Operator-in-
Responsible(ORC)of our findings by forwarding a copy of the enclosed report.
The report should be self-explanatory; however, should you have any questions concerning this report,please
do not hesitate to contact Mr. Bell at(704)235-2192 or at wes.bellr?ncdenr.gov.
Sincerely,
- -C. Michael L. Parker
Regional Supervisor
Surface Water Protection Section
Enclosure:
Inspection Report
cc: Gaston County Health Department
WB
Mooresville Regional Office One
Location:610 East Center Ave..Suite 301 Mooresville.NC 28115 NorthCarolina
Phone:[phone] Fax:[phone]\Customer Service:1-877-623-6748 Naturally
www.ncwaterquality.org
An Equal Opportunity Affirmative Action Employer—30°%n Recycled/10%Post Consumer paper

United States Environmental Protection Agency Form Approved.
EPA Washington,D.C.20460
OMB No.2040-0057
Water C:nmplianne Inspection Repnrt 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 t ti I 2 1 5 I 3 1 NC0004961 1 11 12 1 13/09/06 1 17 181 r I 191 S 1 201 1
IJ Remarks !J
21IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIII166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ------— —Reserved-----—--—
671 1.5 1 69 701 41 71 I N 1 721 N 731 I 174 751 I I I I I I 1 80
Section B: Facility Data --�
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number)
09:25 AM 13/09/06 11/03/01
Riverbend Steam Station
NC Hwy 16 Exit Time/Date Permit Expiration Date
Mount Holly NC 28120 11:45 AM 13/09/06 15/02/28
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Michael Joseph DePalma/ORC/704-731-4506/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Jimmie Allen Stowe,526 S Chruch St Charlotte NC 282011002//704-382-4309/7043829840 No
Section C: Areas Evaluated During Inspection(Check only those areas evaluated)
■Permit Flow Measurement •Operations&Maintenance 1.Records/Reports
▪Self-Monitoring Program II Sludge Handling Disposal III Facility Site Review II 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
/,
Wes Bell 1,\ / i/) ;61i MRO WQ//704-663-1699 Ext.2192/ (7 } Z f�' j
Si nature of Management Q A evi er Agency/Office/Phone and Fax Numbers Dates \ri.3
Marcia Allocco MRO WQ//704-663-1699 Ext.2204/ 1
EPA Form 3560-3(Rev 9-94) revious editions are obsolete.
Page# 1

NPDES yr/mo/day Inspection Type
31 NC0004961 111 121 13/09/06 I
17 18I CI
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Page# 2

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 09/06/2013 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 ■
Is the facility as described in the permit? orlon
#Are there any special conditions for the permit? ■ n n n
Is access to the plant site restricted to the general public? ■ ❑ n n
Is the inspector granted access to all areas for inspection? ■ n n
Comment: The subject permit expires on 2/28/2015. The facility shut down in March
2013 with no current plans of reactivation. No chlorination was added to the Outfall 001
discharge during the previous discharge events.
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? ■ ❑ n n
Is all required information readily available,complete and current? ■ n n n
Are all records maintained for 3 years(lab. reg.required 5 years)? ■ n n n
Are analytical results consistent with data reported on DMRs? ■ ❑ n n
Is the chain-of-custody complete? ■ 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? U 0 n 0
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? 0 0 ■ 0
Is the ORC visitation log available and current? U 0 n n
Is the ORC certified at grade equal to or higher than the facility classification? ■ ❑ n n
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? orlon
Facility has copy of previous year's Annual Report on file for review? 0 0 ■ 0
Page# 3

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 09/06/2013 Inspection Type: Compliance Evaluation
Record Keeping Yes No NA NE
Comment:• The records reviewed during the inspection were organized and well
maintained. Discharge Monitoring Reports (DMRs)were reviewed for the period July
2012 through June 2013. No limit violations were reported and all monitoring
frequencies were correct.
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? ■ n ❑ ❑
#Is the facility using a contract lab? ■ ❑ n 0
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ n ❑ ❑
Incubator(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? n ❑ ■ n
Incubator(BOD)set to 20.0 degrees Celsius+/- 1.0 degrees? ❑ ❑ ■ n
Comment: On-site field analyses (pH and temperature) are performed under
laboratory certification #5157. Duke Energy's Environmental Services Laboratory
(#248) and the contracted laboratory services of ETS, Inc. (toxicity)and Shealy
Environmental Services, Inc. (low level mercury) also provide analytical support.
The pH meter appeared to be properly calibrated and documented.
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? n n ■ n
Is sample collected below all treatment units? ■ 0 ❑ ❑
Is proper volume collected? ■ n n n
Is the tubing clean? 0 0 ■ ❑
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ ❑ ❑ ❑
Is the facility sampling performed as required by the permit(frequency,sampling type representative)? ■ ❑ ❑ ❑
Comment: The subject permit requires effluent grab samples. No discharges were
reported at Outfall 002A (yard sump overflow) during the DMR review period. No
discharges have been reported from Outfall 002 (ash basin) since 5/13/2013 due to
facility shutdown and the low volume of influent flows (domestic wastewater, plant
drains, etc.) into the ash basin treatment system.
Upstream/Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit(frequency,sampling type,and sampling location)? ■ n ❑ ❑
Comment:
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ ❑ n ■
Page# 4

FIF
Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 09/06/2013 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 0 0 ■ 0
Judge, and other that are applicable?
Comment: The facility appeared to be properly operated and well maintained.
Comprehensive dike inspections are performed (and documented) on a monthly basis
for both ash basins. The last two dike inspections were performed on 7/16/2013 and
8/26/2013.
The water level at the discharge tower for the second ash basin (Outfall 002)was
approximately twelve to sixteen inches below the discharge weir(stop log).
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? 0 0 ■ 0
Is flow meter calibrated annually? 0 0 ■ 0
Is the flow meter operational? orlon
(If units are separated)Does the chart recorder match the flow meter? 0 0 • 0
Comment: Outfall 001 flows were measured by pump curves (calculations involving#
of pumps, pump rates, pump run times, etc.)and Outfall 002 flows are measured by a
staff guage and weir (with supporting calculations).
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? U n n n
Are the receiving water free of foam other than trace amounts and other debris? • 0 0 0
If effluent (diffuser pipes are required) are they operating properly? 0 0 ■ 0
Comment: No effluent discharges were observed from Outfalls 001 and 002. The
receiving stream (Outfall 002)did not appear to be negatively impacted.
Page# 5

�. L.L.
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory Charles Wakild, P.E. John E. Skvarla, Ill
Governor Director Secretary
January 28, 2013
Mr. Allen Stowe, Water Management
Duke Energy Carolinas, LLC
526 South Church Street, EC13K
Charlotte, North Carolina 28202
Subject: Division of Water Quality Site Visits
Riverbend Steam Station (NC0004961) and Plant Allen Steam Station (NC0004979)
Gaston County
Dear Mr. Stowe:
Enclosed you will find a compact disc (CD) containing information gathered during the site visits
conducted by Mooresville Regional Office staff(hereinafter MRO staff) at the above noted Duke Energy
Carolinas, LLC (hereinafter Duke) permitted facilities on December 4-6, 2012. The visits were conducted
in conjunction with the annual inspections of the coal ash impoundments by staff from the Land Quality
section of the Division of Energy, Mineral, and Land Resources (hereinafter DEMLR) under their dam
safety program.
The site visits were prompted by recent correspondence received from the Catawba Riverkeeper
Foundation, which highlighted their concerns with unpermitted seepages/outfalls at the noted facilities.
As a result, MRO staff visited areas at both facilities where there was seepage (as defined by DEMLR)
from the coal ash impoundments, Outfall 002 as noted under the respective permits, and the areas
highlighted by the Catawba Riverkeeper directly along the shoreline (with Mountain Island Lake or lake
Wylie) as possible "seepage areas."
At each facility DWQ staff collected analytical samples (metals, dissolved solids, and nutrients) from
permitted Outfall 002 as well as three seepage locations (also sampled by Duke personnel). In addition,
MRO staff performed water quality readings (temperature, pH, dissolved oxygen, and conductivity) at the
above noted sampling locations along with areas around Outfall 002 at the Riverbend steam Station
(noted by the Catawba Riverkeeper Foundation).
The enclosed CD contains two folders. Folder 018 contains the pictures taken on December 4th and 5th
whereas folder 019 contains the pictures taken on December 6th along with a summary document
containing sampling location maps, the analytical results, and the field water quality readings. The
aforementioned information has been forwarded to the Division's NPDES Unit for their consideration.
If you have any questions regarding the enclosed information please contact Ms. Marcia Allocco or Mr.
Andrew Pitner at 704-663-1699.
2/„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 One
Phone:[phone] Fax:[phone]\Customer Service:1-877-623-6748 NorthCarolina
Internet:http://portal.ncdenr.org/web/wq Naturally
atuNa ly
An Equal Opportunity 1 Affirmative Action Employer-30%Recycled/10%Post Consumer paper � l ` "

Allocco, Marcia
From: Stowe, Allen [[e-mail]]
Sent: Tuesday, June 12, 2012 8:09 AM
To: Krebs, Rob; Jones, Steve
Cc: Belnick, Tom; Allocco, Marcia; Parker, Michael
Subject: RE: Riverbend arsenic
Rob,
My answers are listed below. Steve—please clarify if I've omitted any pertinent details. Thanks
Allen Stowe
EHS Water Management
Duke Energy Carolinas
704-382-4309 (Office)
704-516-5548 (Cell)
[e-mail]
From: Krebs, Rob [mailto:[e-mail]]
Sent: Monday, June 11, 2012 11:10 AM
To: Stowe, Allen
Cc: Belnick,Tom; Allocco, Marcia; Parker, Michael
Subject: RE: Riverbend arsenic
Allen,
Just a couple of quick questions:
1) What is the proposed shut-down date of Riverbend?
1/1/2015
2) When the plant is not operating, is there still flow to the ash basins?
Yes,there is flow from various plant sumps,yard drains and stormwater to the ash basin.
3) If there is no flow from the plant, do the ash basins still discharge? if so, where is the flow originating from?
If the units are not operating,then no ash is sluiced to be ash basins, but there is still flow from the plant area
(yard drains, sumps)to the ash basin.
4) Is there anticipated to be flow following plant shut down?
I don't think it is been fully determined yet what plant retirement will be like yet. Engineering studies are
currently being conducted.
We noticed you reported the plant last operated January 23, 2012. However,we still see reported flow though the most
recent DMR (March)we have on file.
Rob Krebs
From: Stowe, Allen [mailto:[e-mail]]
Sent: Tuesday, May 22, 2012 8:20 AM
To: '[e-mail]'
Cc: Allocco, Marcia; '[e-mail]'
Subject: Re: Riverbend arsenic
1

Thanks David. The last time Riverbend operated was January 23rd of this year.
Allen Stowe -sent using Blackberry
704-516-5548
From: Caldwell, David [mailto:[e-mail]]
Sent: Tuesday, May 22, 2012 07:37 AM
To: Stowe, Allen
Cc: Allocco, Marcia <[e-mail]>; Rozzelle, Rusty <[e-mail]>
Subject: Riverbend arsenic
Allen,for your information,we collected a routine sample below the Riverbend ash basin discharge on Mtn. Island Lake
on 5/7/12 at the coordinates 35.3681—80.9581. The arsenic was elevated. See results below.
Sample ID Location Collection Date Arsenic Result, ug/
AE26430 RB1—RiverBend SS Ash Basin Discharge 5/7/12 35
David Caldwell, Environmental Supervisor
Charlotte-Mecklenburg Storm Water Services
Mecklenburg County Water Quality Program
700 North Tryon Street
Charlotte, NC 28202
phone [phone]
fax [phone]
2

Ar F ILE
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
October 19, 2011
Mr. Jimmie Allen Stowe, Jr.
Duke Energy Corporation
526 South Church Street/EC 13K
Charlotte, NC 28202
Subject: Compliance Sampling Inspection
RiverBend Steam Plant
NPDES Permit NC0004961
Gaston County,North Carolina
Dear Mr. Stowe:
Enclosed please find a copy of the Compliance Sampling Inspection Report for the inspection conducted at the
subject facility on August 26, 2011, by Ms. Donna Hood and Ms. Marcia Allocco, of this Office. Results for all
effluent samples as well as the phytoplankton analysis report are included. Please inform the facility's Operator-in-
Responsible Charge of our findings by forwarding a copy of the enclosed report.
This report should be self-explanatory; however, should you have any questions concerning the report, please
do not hesitate to contact Ms. Hood or me at(704) 663-1699.
Sincerely,
- ) Cam-
" ' Robert B. Krebs
Surface Water Protection Regional Supervisor
Enclosure
cc: David Merryman, Catawba Riverkeeper
DH
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115 One
Phone:[phone] Fax:[phone] Customer Service:1-877-623-6748 NorthCaroliIla
Internet:www.ncwaterquality.org y� {/
An Equal Opportunity'',Affirmative Action Employer—50%Recycled/10%Post Consumer paper Natul al[

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 ti I 2 1 2 I 31 NC0004961 111 121 11/08/26 117 18 I c I 19 I C' 20 I I
!_! !=! Remarks !J 1� !J
21IIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ---------------------Reserved
671 3.0 169 70)2 71' I 721.1d N 731 I 174 75I 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)
10:30 AM 11/08/26 11/03/01
Riverbend Steam Station
NC Hwy 16 Exit Time/Date Permit Expiration Date
Mount Holly NC 28120 12:00 PM 11/08/26 15/02/28
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Robert Steven Jones/ORC/704-263-3242/
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)
11 Permit II Operations&Maintenance •Self-Monitoring Program II Facility Site Review
1.Effluent/Receiving Waters
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Sign. - s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Donna Hood MRO WQ//704-663-1699 Ext.2193/ 0/
Marcia Allocco MRO WQ//704-663-1699 Ext.2204/
Signature of Management Q A ie Agency/Office/Phone and Fax NumbersDate .
-��--, rd I I
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

NPDES yr/mo/day Inspection Type (cont.) 1
3, NC0004961 111 12
I 11/08/26 117 181
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
The inspection was performed as a response from a complaint by Mr. David Merryman, the Catawba
Riverkeeper. Mr. Merryman reported an oily sheen on the surface of the water at the point of discharge for
the Riverbend Stream Station, NC0004961. At the time of the inspection several samples were collected to
determine the potential source of the oily sheen. Effluent samples were collected to determine compliance
with the associated NPDES permit, NC0004961. River samples were collected to analyze phytoplankton
presence as a possible contributor of the surface sheen reported by Mr. Merryman.
The sheen was found to be naturally occurring. Please see the attached report from Mr. Mark Vander
Borgh, Environmental Sciences Section of the Division of Water Quality. Effluent samples were found to be
compliant with the NPDES permit.
Riverbend WWTP Effluent
Sample Date(s): 08/26/2011
NPDES Permit No.NC0004961
COD: High, mg/I <20
Sulfate, mg/I 50
NH3-N, mg/I <0.02
TKN, mg/I <0.2
NO2 + NO3, mg/I <0.02
P: Total, mg/I 0.09
Residue, Suspended, mg/I <6.2
pH, s.u. 7.2
Chloride, mg/I 7.1
Oil and Grease, mg/I <10
Cu-Copper, ug/I 2.2
Fe-Iron, mg/I 69
Fluoride, mg/I <0.4
Hg-Mercury, ug/I <0.20
Conductivity, umhos/cm 188
Se-Selenium, ug/I <5.0
Dissolved Oxygen, mg/I 8.2
As-Arsenic, ug/I 95
Temperature, OC 28.7
Chlorine, mg/L 7.1
Page# 2

A"fiftilr
NCDENR
North Carolina Department of Environment and Naturai Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director . Secretary
May 4, 2011
Mr. Allen Stowe, Water Management
Duke Energy Corporation
Post Office Box 1006/EC13K
Charlotte,North Carolina 28201-1006
Subject: Compliance Evaluation Inspection
Riverbend Steam Station
NPDES Permit No. NC0004961
Gaston County,N.C.
Dear Mr. Stowe:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection
conducted at the subject facility on April 28, 2011 by Mr. Wes Bell of the Mooresville Regional
Office. Please advise the facility's Operator-in-Responsible Charge of our findings by
forwarding a copy of the enclosed report.
Should you have questions concerning this report, please do not hesitate to contact Mr.
Bell at(704) 663-1699.
Sincerely,
-( Robert B. Krebs
Regional Supervisor
Surface Water Protection
Enclosure:
Inspection Report
. cc: Gaston County Health Department
WB
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://portal.ncdenr.orghmeblwq
An Equal Opportunity 1 Affirmative Action Employer—50%Recycled/10%Post Consumer paper

•
Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 08/26/2011 Inspection Type: Compliance Sampling
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? 0 0 ■ 0
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? U ❑ ❑ ❑
Comment:
Operations& Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ n ❑ ❑
Does the facility analyze process control parameters,for ex:MLSS, MCRT,Settleable Solids, pH, DO,Sludge ■ ❑ ❑ ❑
Judge,and other that are applicable?
Comment:
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? ■ ❑ ❑ ❑
Are the receiving water free of foam other than trace amounts and other debris? ■ ❑ ❑ ❑
If effluent (diffuser pipes are required) are they operating properly? ❑ 0 • 0
Comment:
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? U 0 ❑ ❑
Is sample collected below all treatment units? U ❑ ❑ ❑
Is proper volume collected? ■ ❑ ❑ ❑
Is the tubing clean? ■ ❑ ❑ ❑
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ ❑ ❑ ❑
Is the facility sampling performed as required by the permit(frequency,sampling type representative)? ■ ❑ ❑ ❑
Comment:
Page# 3

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Riverbend WWTP Grab: X Composite:
Sample Date(s): 08/26/2011 NPDES Permit No. NC0004961
Sample Location: Effluent County: Gaston
BOD5,mg/1 Phenols,ug/1
COD:High,mg/I <20 Sulfate,mg/1 50
COD:Low,mg/1 Sulfide,mg/1
Coliform:Fecal,#/100 ml Biomass:Dry Weight
Coliform:Total,#/100 ml Biomass:Peri Ash Free
Coliform:Tube Fecal,MPN NH3-N,mg/1 <0.02
Coliform:Tube Total,MPN TKN,mg/I <0.2
Residue: Total,mg/1 NO2+NO3,mg/I <0.02
Volatile,mg/1 PO4,mg/I
Fixed,mg/I P:Total,mg/1 0.09
Residue: Suspended,mg/I <6.2 P:Dissolved,mg/I
Volatile,mg/1 Ag-Silver,ug/I
Fixed,mg/1 Al-Aluminum,ug/1
Settleable Solids,m1/1 Be-Beryllium,ug/I
pH,s.u. 7.2 Ca-Calcium,ug/1
TOC,mg/1 Cd-Cadmium,ug/1
Turbidity,NTU Co-Cobalt,ug/I
Chloride,mg/1 7.1 Cr-Chromium:Total,ug/1
Oil and Grease,mg/I <10 Cu-Copper,ug/1 2.2
Cyanide,ug/1 Fe-Iron,mg/I 69
Fluoride,mg/1 <0.4 Pb-Lead,ug/I
Hardness:Total,mg/1 Hg-Mercury,ug/1 <0.20
MBAS,ug/I Ni-Nickel,ug/1
Conductivity,umhos/cm 188 • Se-Selenium,ug/1 <5.0
Dissolved Oxygen,mg/1 8.2 As-Arsenic,ug/1 95
Temperature,°C 28.7
Alkalinity,mg/L
Chlorine,mg/L
* denotes a violation of a permit limitation.

Algal Analysis Report August 31,2011
Collector: Donna Hood,Mooresville Regional Office
Date Collected: 8/26/11 ---
Location: Mountain Island Lake @ Riverbend Steam Station
Reason Collected: Oily surface filmy.
Sample Information: Samples were collected in response to a
concern about an oily film in a cove near Duke Energy's ' �-
Riverbend steam station discharge.
Results of Analysis: The oily film was organic material 1,
consisting of decomposing insect exuvia,algae(diatoms and the t'� '
filamentous bluegreen Oscillatoria)protozoa,bacteria and fungi.
Ecological Significance: The organic material is consistent to
surface films found in late summer after a sizable hatching of = '
insects, usually chironomids or"midges". The remains of the 1'7 _ '.'
larval insects, called exuvia,collect on the surface and start to
decay. The decomposition process releases fats,oils and
nutrients becoming a rich food source for fungi,bacteria and
algae.The films become more noticeable as they trap gasses and
collect sediments and mineral precipitates that give them a dirty,
musty odor. Surface films often concentrate in coves or quiet
areas through wind and wave action. Surface films created by
natural decomposition can be distinguished from petroleum
products by running a stick or paddle through them. If the film Figure 1. Surface film in cove(David Merryman)
breaks apart,it is usually natural; if it quickly reforms to a thin
shiny film,then petroleum products are suspected.
8 -..
, *
.. 1 x
r • •
ys illoSe, • r
4.
w >
W.
s ,
4
Figures 2 & 3. Organic matter, insect parts and algae floating on Mountain Island Lake, August 2011
Reportprepared by:
Mark Vander Borgh,Division of Water Quality,Environmental Biologist.
Email: [e-mail] ncdenr.gov Phone:[phone]

ANALYTICAL RESULTS SHEET
NAME OF FACILITY: Riverbend WWTP Grab: X Composite:
Sample Date(s): 08/26/2011 NPDES Permit No. NC0004961
Sample Location: Effluent County: Gaston
BOD5,mg/I Phenols,ug/I
COD:High,mg/1 <20 Sulfate,mg/1 50
COD:Low,mg/1 Sulfide,mg/I
Coliform:Fecal,#/100 ml Biomass:Dry Weight
Coliform:Total,#/100 ml Biomass:Peri Ash Free
Coliform:Tube Fecal,MPN NH3-N,mg/I <0.02
Coliform:Tube Total,MPN TKN,mg/1 <0.2
Residue: Total,mg/1 NO2+NO3,mg/1 <0.02
Volatile,mg/I PO4,mg/1
Fixed,mg/1 P:Total,mg/1 0.09
Residue: Suspended,mg/1 <6.2 P:Dissolved,mg/I
Volatile,mg/1 Ag-Silver,ug/1
Fixed,mg/1 Al-Aluminum,ug/1
Settleable Solids,m1/I Be-Beryllium,ug/1
pH,s.u. 7.2 Ca-Calcium,ug/I
TOC,mg/1 Cd-Cadmium,ug/1
Turbidity,NTU Co-Cobalt,ug/1
Chloride,mg/I 7.1 Cr-Chromium:Total,ug/I
Oil and Grease,mg/1 <10 Cu-Copper,ug/1 2.2
Cyanide,ug/1 Fe-Iron,mg/1 69
Fluoride,mg/I <0.4 Pb-Lead,ug/1
Hardness:Total,mg/1 Hg-Mercury,ug/1 <0.20
MBAS,ug/1 Ni-Nickel,ug/1
Conductivity,umhos/cm 188 Se-Selenium,ug/1 <5.0
Dissolved Oxygen,mg/I 8.2 As-Arsenic,ug/1 95
Temperature,°C 28.7
Alkalinity,mg/L
Chlorine,mg/L
* denotes a violation of a permit limitation.

Algal Analysis Report August 31,2011r
Collector: Donna Hood,Mooresville Regional Office
Date Collected: 8/26/11
Location: Mountain Island Lake @ Riverbend Steam Station
Reason Collected: Oily surface film
Sample Information: Samples were collected in response to a
concern about an oily film in a cove near Duke Energy's 4-
Riverbend steam station discharge.
Results of Analysis: The oily film was organic material , "r`
consisting of decomposing insect exuvia, algae(diatoms and the , ,
filamentous bluegreen Oscillatoria)protozoa,bacteria and fungi. { �' ;1, j
•
Ecological Significance: The organic material is consistent to
surface films found in late summer after a sizable hatching of
insects,usually chironomids or"midges". The remains of the
larval insects,called exuvia,collect on the surface and start to
decay. The decomposition process releases fats,oils and
nutrients becoming a rich food source for fungi,bacteria and
algae.The films become more noticeable as they trap gasses and
collect sediments and mineral precipitates that give them a dirty,
musty odor. Surface films often concentrate in coves or quiet
areas through wind and wave action. Surface films created by
natural decomposition can be distinguished from petroleum
products by running a stick or paddle through them. If the film Figure 1. Surface film in cove(David Merryman)
breaks apart, it is usually natural; if it quickly reforms to a thin
shiny film,then petroleum products are suspected.
j.
Y 1 Illr w
• � .. Y
_. 1.
0'* .
0 ♦ `
., f - ��" "� r -
er , .i •
1 10
4.
\•
' R a --
Figures 2&3. Organic matter, insect parts and algae floating on Mountain Island Lake,August 2011.
Report prepared by:
Mark Vander Borgh,Division of Water Quality, Environmental Biologist.
Email: mark.vanderborghnncdenr.gov Phone:[phone]

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director Dee Freeman
Secretary
January 26, 2010
E. 5157
Mr. Rodney Wike
Duke Power Co. Riverbend Steam Station
13339 Hager's Ferry Road )i
Huntersville, NC 28078-7929 "
6
SUBJECT: North Carolina Wastewater/Groundwater Laboratory Certification (NC WW/GW LC)
Maintenance Inspection
.60
•
;r. Dear Mr. Wike:
Enclosed is a report for the inspection performed on November 30, 2009 by Mr. Chet Whiting. No findings are
cited in this report, a response is not required. We appreciate the fine job you and your staff are doing. As a
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,
6-167
Gary Francies
Unit Supervisor
Laboratory Section
"tetZtoores*IitriRegionsiOffica,
Chet Whiting
DENR DWQ Laboratory Section NC Wastewater/Groundwater Laboratory Certification Branch One
1623 Mail Service Center,Raleigh,North Carolina 27699-1623 North Carolina
Location:4405 Reedy Creek Road.Raleigh,North Carolina 27607-6445 / f/ .r /
Phone:[phone] t FAX:[phone] U fit1 1 vI+b
Internet:www.dwglab.org
An Equal Opportunity 1 Affirmative Action Employer Customer Service:1-877-623-6748 www.ncwaterquality.org '
y }+� 'a•

•
On-Site Inspection Report
LABORATORY NAME: Duke Power Co. Riverbend Steam Station
NPDES PERMIT#: NC0004961
ADDRESS: Duke Power Company LLC
13339 Hager's Ferry Road
Huntersville, NC 28078-7929
CERTIFICATE#: 5157
DATE OF INSPECTION: November 30, 2009
TYPE OF INSPECTION: Field Maintenance
AUDITOR(S): Chet Whiting
LOCAL PERSON(S) CONTACTED: Rodney Wike
I. INTRODUCTION:
This laboratory was inspected to verify its compliance with the requirements of 15A NCAC 2H .0800 for
the analysis of environmental samples.
II. GENERAL COMMENTS:
The laboratory has been proactive in its approach to certification; the analysis of recommended post
calibration pH checks is one example. The laboratory has also implemented a system of traceability for
consumables well before it was required by North Carolina Wastewater/Groundwater Laboratory
Certification policy.
III. FINDINGS, REQUIREMENTS, COMMENTS AND RECOMMENDATIONS:
General Laboratory
Comment: Requested analytical data and supporting information was not available at the time of the
inspection. The North Carolina Administrative Code, 15A NCAC 02H .0807 (a) (10) states, "Laboratory
Decertification. A laboratory may be decertified, for any or all parameters, for up to one year for any of
the following infractions: Failing to supply analytical data requested by the State Laboratory". This was
corrected the morning following the inspection; all requested data was transmitted electronically to this
office. No further response is necessary for this finding.
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 Riverbend Steam Station (NPDES permit# NC0004961) for August and September, 2009.
No transcription errors were detected. The facility appears to be doing a good job of accurately
transcribing data.

Page 2
#5157 Duke Power Co. Riverbend Steam Station
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

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
July 6, 2009
Mr. Terry Taylor
Duke Power
Riverbend Steam Station
175 Steamplant Rd.
Mt. Holly,NC 28120
Subject: Compliance Evaluation Inspection
RiverBend Steam Plant
NPDES Permit NC0004961
Gaston County,North Carolina
Dear Mr. Taylor:
Enclosed please find a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the
subject facility on June 23, 2009, by Ms. Donna Hood of this Office. Please inform the facility's Operator-in-
Responsible Charge of our findings by forwarding a copy of the enclosed report.
This report should be self-explanatory; however, should you have any questions concerning the report, please
do not hesitate to contact Ms. Hood or me at [phone].
Sincerely,
Robert B. Krebs
Surface Water Protection Regional Supervisor
Enclosure
cc: Gaston County Health Department
DH
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115 One
Phone:[phone]\Fax:[phone]\Customer Service:1-877-623-6748 North Caroli na
Internet:www.ncwaterquality.org
•
An Equal Opportunity\Affirmative Action Employer—50%Recycled/10%Post Consumer paper Naturally

United States Environmental Protection Agency Form Approved.
E PA Washington,D.C.20460 OMB No.2040-0057
Water Compliance Inspection Report Approval expires 8-31-98
Section A: National Data System Coding(i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 12j 2 151 31 NC0004961 111 121 09/06/23 1 17 181 CI 191 sl 201 11
Remarks
211111111111111111111111111111111111111111111111166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ------Reserved--------
671 1 69 701 51 711 1 721 NI 73 11 1 74 751 1 1 1 l 1 1 180
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)
09:00 AM 09/06/23 05/03/01
Riverbend Steam Station
NC Hwy 16 Exit Time/Date Permit Expiration Date
Mount Holly NC 28120 11:00 AM 09/06/23 10/02/28
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Gregory Paul Phillips/ORC/828-478-7805/
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)
I.Permit II Flow Measurement a Operations&Maintenance II Records/Reports
III Effluent/Receiving Waters •Laboratory
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Si ture(s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Donna H od MRO WQ//704-663-1699 Ext.2193/
11 l �.
S' nature of Management Q�Revie r Agency/Office/Phone and Fax Numbers °C
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

NPDES ydmo/day Inspection Type 1
31 NC0004961 111 121 09/06/23 117 18I C
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Page# 2

i •
Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 06/23/2009 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 m n
Is the facility as described in the permit? ■ n n n
#Are there any special conditions for the permit? norm
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:
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ n n n
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO,Sludge 0 n ■ n
Judge,and other that are applicable?
Comment:
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? ■ n n n
Is all required information readily available, complete and current? ■ n n n
Are all records maintained for 3 years(lab. reg. required 5 years)? ■ 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 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
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
Page# 3

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 06/23/2009 Inspection Type: Compliance Evaluation
Record Keeping Yes No NA NE
Facility has copy of previous year's Annual Report on file for review? ❑ ❑ ■ ❑
Comment: The former ORC, Gregory Paul Phillips, has retired. The new ORC is
Steve Jones. The form was properly submitted to TACU on 1.13.2009. DMRs for April
2008-March 2009 were reviewed for the inspection. No violations were reported during
the review period. During the inspection several chain of custodies were missing the
date and/or time received were received by the Duke Power internal courier.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? ■ ❑ n n
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 less than or equal to 6.0 degrees Celsius)? ■ n ❑ ❑
Incubator(Fecal Coliform)set to 44.5 degrees Celsius+/-0.2 degrees? n n ■ ❑
Incubator(BOD)set to 20.0 degrees Celsius+/- 1.0 degrees? ❑ ❑ ■ ❑
Comment: Laboratory analyses are performed under certification#248. Toxicity is
performed by Environmental Testing Solutions, Inc#600. •
Lagoons Yes No NA NE
Type of lagoons?
#Number of lagoons in operation at time of visit?
Are lagoons operated in?
#Is a re-circulation line present? n n U n
is lagoon free of excessive floating materials? ■ ❑ ❑ n
#Are baffles between ponds or effluent baffles adjustable? n n U ❑
Are dike slopes clear of woody vegetation? ■ ❑ ❑ ❑
Are weeds controlled around the edge of the lagoon? ■ ❑ n n
Are dikes free of seepage? ■ n n n
Are dikes free of erosion? ■ n n n
Are dikes free of burrowing animals? ■ n n n
#Has the sludge blanket in the lagoon (s)been measured periodically in multiple locations'? ❑ ❑ ■ ❑
#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
Is the lagoon free of short circuiting? ■ n n ❑
Page# 4

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 06/23/2009 Inspection Type: Compliance Evaluation
Lagoons Yes No NA NE
Comment:
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? n n ■ n
Is flow meter calibrated annually? 0 0 ■ 0
•
Is the flow meter operational?
nn ■ ❑
(If units are separated)Does the chart recorder match the flow meter? n n ■ n
Comment: Flow is reported with pump run time on Outfall 001 and weir and staff
gauge on Outfall 002. No flow has discharged from Outfall 002A.
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? ■ n n n
Are the receiving water free of foam other than trace amounts and other debris? ■ n n n
If effluent (diffuser pipes are required) are they operating properly? n n ■ n
Comment: •
Page# 5

•
Allen Stowe
November 17,2009
Page 2
4. Concentrations of trace elements, especially mercury, selenium, and arsenic, in the tissue of Common Carp,
sunfish, and bass continued to be less than concentrations of regulatory concern and have remained low for the
past decade. All selenium concentrations were well below the North Carolina Department of Health and Human
Services(NCDHHS)criterion of 10 pg/g (parts per million). All arsenic concentrations were less than the US EPA
criterion of 1.2 pg/g for recreational fishermen; no criterion exists in NC. All mercury concentrations were less
than the NCDHHS criterion of 0.4 pg/gm for recreational fishermen. There are no state or federal criterion for zinc
concentrations in fish tissue.
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 4-3, 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.
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
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, EPT taxa richness and EPT density should also be reported for each station going forward.
These metrics can be reported in accordance with current graphical formats.
If you have any questions, please do not hesitate to contact me or my staff.
Yours truly,
N)A1V‘ceof
Jay Sauber
Acting Chief, Environmental Sciences Section
cc: Jeff DeBerardinis, Environmental Sciences Section
Eric Fleek, Environmental Sciences Section
Debra 'wen, Environmental Sciences Section
Jeff Poupart, Surface Water Protection Section
Bryn H. Tracy, Environmental Sciences Section
Charles Weaver, Surface Water Protection Section

INSPECTION REPORT ROUTING SHEET
To be attached to all inspection reports in-house only.
Laboratory Cert. #: 5157
Laboratory Name: Duke Power Co. Riverbend Steam Station
Inspection Type: Field Maintenance •
Inspector Name(s): Chet Whiting
Inspection Date: November 30, 2009 n N 2 8 2010
Date Report Completed: January 13, 2010 •
Date Forwarded to Reviewer: January 22, 2010
Reviewed by: Jason Smith
Date Review Completed: January 25, 2010
Cover Letter to use: _ Insp. Initial Insp. Reg. X Insp. No Finding _ Insp. CP
Unit Supervisor: Gary Francies
Date Received: 1/25/2010
Date Forwarded to Alberta: 1/25/2010 co ,ur
Date Mailed:

ArA
NCDENR
North Carolina Department of Environment and Natural Resources.
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
November 17, 2009 NOV 1 9 2009
Allen Stowe
Water Management, Duke Energy
EC13K
PO Box 1006
Charlotte, NC 28201-1006
Subject: Review of Duke Energy Carolinas, NPDES Permit NC0004961, "Assessment of Balanced and
Indigenous Populations in Mountain Island Lake near Riverbend Steam Station", August 2009.
Environmental Sciences Section staff have reviewed the subject document which was received on August 28, 2009. We
apologize for the delay on communicating our comments back to you. Jeff DeBerardinis, Eric Fleek, Debra Owen, and
Bryn H. Tracy reviewed the sections on trace element analyses in fish, macroinvertebrates, water and sediment
chemistry, and fish, respectively. By agreement with the Department of Environment and Natural Resources (NCDENR),
Duke Energy conducts annual monitoring of Mountain Island Lake in the vicinity of the Riverbend Steam Station to
support NPDES Permit NC0004961 (A.(1). Effluent Limitations and Monitoring Requirements—Final ("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'.). The power plant operates under an DWQ-and EPA-approved §316(a)thermal variance. The report
does fulfill 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 Riverbend Steam Station is unlikely in having an impact to the benthic macroinvertebrate
and fish communities in Mountain Island Lake. We also conclude that the two aquatic communities currently qualify as
balanced, indigenous communities.
We do have some comments and observations and analysis requests for future reports:
Comments and Observations
1. Nutrient concentrations in Mountain Island Lake were similar to those previously observed during DWQ's lake
sampling. However, nutrient loading appears to be increasing from McDowell Creek. Total phosphorus and
specific conductance are generally greater in the McDowell Creek cove as compared with the rest of the
reservoir. The entire 11.6 mile long McDowell Creek, from its source to its confluence with the lake, is listed as
impaired for biological integrity on DWQ's 2006 EPA-approved §303(d) list.
2. Aqueous concentrations of metals were low and consistent with the low levels of turbidity and suspended solids.
These measurements agree with the surface metal sampling conducted by DWQ. However, one sample of total
recoverable arsenic(11.4 pg/L) was greater than the state water quality standard of 10 pg/L. This water sample
was collected on August 20, 2008 near the bottom near the forebay of the Mountain Island Hydropower Station.
3. The fish assemblage in this multi-purpose reservoir is comprised of 22 indigenous and 13 nonindigenous species
(Tables 5-1 and 5-2). The nonindigenous species have been introduced for one reason or another either
accidentally or to manage the reservoir's fishery and aquatic since impoundment of the Catawba River. Section
316(a) of the Clean Water Act does allow for". . . Such a community may 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).
1621 Mail Service Center,Raleigh,North Carolina 27699-1621 One
Location:4401 Reedy Creek Road,Raleigh,North Carolina 27607 NorthCarolina
Phone:[phone] FAX:[phone] Customer Service:1-877 623-6748
Internet:htto:llh2o.enr.state.nc.us/esb/ Naturally
An Equal Opportunity\Affirmative Action Employer

. f
•
+r,, Duke CORPORATE EHS SERVICES
.1 Energy® Duke Energy Corporation
626 South Church St.
Charlotte,NC 28202
Mailing Address:
10
6
January 13, 2009 Cha l tte, NC 2820�1006
North Carolina Department of Environment
And Natural Resources
Water Pollution Control System Operators
Certification Commission
1618 Mail Service Center
Raleigh, North Carolina 27699-1618
SUBJECT: Operator In Responsible Charge
Riverbend Steam Station —NC0004961
Please make the following changes to your database effective January 1, 2009.
❖ Gregory P. Philips — Delete as CRC at Riverbend Steam Station
❖ Gregory P. Phillips — Delete as Back-Up ORC at:
o Allen Steam Station
o Belews Creek Steam Station
o Buck Steam Station
o Cliffside Steam Station
o Dan River Steam Station
o Lincoln CT Facility
o Marshall Steam Station
❖ Robert S. Jones --Add as ORC at Riverbend Steam Station
+ Robert S. Jones — Delete as Back-Up ORC at Riverbend Steam Station
❖ Gregory P. Phillips—Add as Back-Up ORC at Riverbend Steam Station
All other Information remains current and no other changes are necessary at this time.
Should you require additional information, please contact Alien Stowe at [phone].
Sincerely,
Mr CrA.,.._.
Patrick J. McCabe, P,E.
Manager, Env-Field Support
Attachments
/phs
www.duke-enGtgY,com
V/Z t89I-Z8C-VOL lc6aau3 Bing WV OV:60 600Z-UnC-CZ

Duke
FAX Energy®
Duke Energy
526 South Church Street
Charlotte, NC 28202
DATE: 4_3/0
TO: P!/
COMPANY: •
FAX: /2a7/`- c262- 3 29
PHONE:
FROM: L../3
-�,
FAX:
PHONE:
NO. OF PAGES: (i.h c G4U,e✓
COMMENTS:
THE INFORMATION CONTAINED IN THIS FACSIMILE MESSAGE IS INTENDED ONLY FOR THE USE OF THE INDIVIDUAL
OR ENTITY NAMED ABOVE. IF THE READER OF THIS MESSAGE IS NOT THE INTENDED RECIPENT,ANY
DISSEMINATION,DISTRIBUTION OR COPYING OF THIS COMMUNICATION IS PROHIBITED. IF YOU HAVE RECEIVED THIS
COMMUNICATION IN ERROR,PLEASE IMMEDIATELY NOTIFY US BY TELEPHONE AT THE NUMBER LISTED ABOVE
www.duke-energy.com
•
V/1 1891-Z8£-VOL ,C6aau3 aln0 WV Ob:60 600Z-unr-£Z

" Water Pollution Control System ORC Designation Form
WPCSOCC
NCAC 15A:08G.0201
General Information:
Permittee Owner/OffcerName: Riverbend Steam Station
Mailing Address: 175 Steamnlant Road
City: Mt.Holly State: NsC Zip: 78120
Telephone Number:.../7 263- 200
Signature: , Date; ///l A/d40 ff
Facility Information:
Facility: Riverbend Steam Station
Permit Number: NC0004961 County: Gaston
SUBMIT A SEPARATE FORM FOR EACH TYPE OF SYSTEM !
Mark(X)Type of Facility Clan(1 —4) Clash
Wastewater Plant Spray Irrigation isLA
Physical/Chemical _ 1 Land Application IS/A
Collection System Subsurface NIA
Operator in Responsible Charge:
Print Name: Robert Steven Jones Social Security# : 1011111
Certificate Type and Grade: Grade 1 Physical/Chemical Certi a I ate#: 28868
Work Telephone: [phone] Signature: ,' ' /" 1-oq
/ (date)
Back-Up Operator in Responsible Charge:
Print Name: Gregory P.Phillips Social Security# i
Certificate Type and Grade: Grado 1 Physical/Chemical Certificate#: .28197
p Signature: /2 WorkTele hone: (7041913-2436
„=„
Mail or Fax to: WPCSOCC
1618 Mail Service Center
Raleigh,N.C.27699-1618
Fax: [phone]
Revised 10/2000
ti/ti 1891-Z8£-VOL 0aau3 a i a WV 017:60 600Z-unC-a

r I
Be w/attachment G.P. Phillips
R.S. Jones
be w/o attachment D.L. Scruggs
M.Y. Martin
N.J. Zalme
S.D. Hodges
G.B. Tolbert
J.N. Costello
D.L, Burrell
File Number. 855404
Certified Mail: 7008 1 140 0002 2718 5462
NNW
ti/£ t89t-Z81-VOL 46.aau3 aina WV 017 60 600Z-unC-£Z

Michael F.Easley,Governor
1;
EQ William G.Ross Jr.,Secretar j
North Carolina Department of Environment and Natural Resources
Coleen Sullins.Director
Division of Water Quality
g �.
February 19, 2008
Mr. Gregory Phillips
Duke Power River Bend Steam Station
175 River Bend Road
Mt. Holly, NC 28120
Subject: Compliance Evaluation Inspection
Duke Power River Bend Steam Station
NPDES Permit No.NC0004961
Gaston County,NC
Dear Mr. Phillips:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection
conducted at the subject facility on February 19, 2008 by Mr. John Lesley of this Office. Toxicity
test results relative to sampling at outfall 002 will be forwarded under separate cover when available.
The report should be self-explanatory; however,should you have any questions concerning
this report,please do not hesitate to contact Mr. Lesley or me at(704) 663-1699.
Sincerely,
for Robert B. Krebs
Surface Water Protection
Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
JL
U.L'L,'\.1.
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 EPA WForm Approved.ashington,O.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 2 31 1 1 12 17 U' NC0004961 I I 08/02/19 I 18 -rU 19 12j 20tJ�
Remarks
21IIII 1111 I 1111 1111 IIII I I I1 I I ( I
I I t I IIIIIIII I I I66
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA Reserved
67I 169 73 74 75 80 IJ _, (NI LIJ MI MI
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) 10:30 AM 08/02/19 05/03/01
Riverbend Steam Station
NC Hwy 16 Exit Time/Date Permit Expiration Date
Mount Holly NC 28120 12:30 PM 08/02/19 10/02/28
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Gregory Paul Phillips/ORC/704-263-3241/
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 in Flow Measurement ■Operations&Maintenance ■Records/Reports
■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.270/
Signature of Management Q A f3evie Agency/Office/Phone and Fax Numbers Date
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

NPDES yr/mo/day Inspection Type 1
11 12 17 18
I NC0004961 I I 08/02/19 I
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
No violations were reported in the November 2006 through October 2007 time period.
Page# 2

Permit NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 02/19/2008 Inspection Type: Compliance Evaluation
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? 001110
Is the facility as described in the permit? ■ ❑ ❑ ❑
#Are there any special conditions for the permit? 001. 0
Is access to the plant site restricted to the general public? ■ ❑ ❑ ❑
Is the inspector granted access to all areas for inspection? 111000
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)? . 000
Are analytical results consistent with data reported on DMRs? ■ ❑ ❑ ❑
Is the chain-of-custody complete? ■ ❑ ❑ ❑
Dates,times and location of sampling ■
Name of individual performing the sampling ■
Results of analysis and calibration ■
Dates of analysis ■
Name of person performing analyses ■
Transported COCs ■
Are DMRs complete: do they include all permit parameters? ■ ❑ ❑ ❑
Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ ■ 0
(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? 0 0 ■ ❑
Comment:
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? ■ ❑ ❑ ❑
Page# 3

Permit NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 02/19/2008 Inspection Type: Compliance Evaluation
Laboratory Yes No NA NE
Are all other parameters(excluding field parameters)performed by a certified lab? ■ ❑ ❑ ❑
#Is the facility using a contract lab? 11000
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: Grab samples are taken in accordance NPDES Permit requirements. All
samples are collected and shipped on ice. The facility utilizes Environmental Testing
Solutions for toxicity testing and the Duke Environmental Lab for other analyses.
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 facility is not a biological treatment system, process control is limited to
pH.
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? 0 0 ■ 0
Is flow meter calibrated annually? OOND
Is the flow meter operational? 0 0 ■ 0
(If units are separated) Does the chart recorder match the flow meter? 0 0 ■ 0
' Comment: Flow is reported using pump logs CCW discharge and weir measurements
at Ash Basin discharge.
Page# 4

Michael F.Easley, ernor
9p
William G.Ross Jr.,Secretary
y North Carolina Department of Environment and Natural Resources
_.{ Coleen H.Sullins,Director
Q • a Division of Water Quality
June 1, 2007
Mr. Gregory Phillips
Duke Power Company
River Bend Steam Station
175 River Bend Road
Mount Holly,North Carolina 28120
Subject: Compliance Evaluation Inspection
Duke Power River Bend Steam Station
NPDES Permit No. NC0004961
Gaston County,North Carolina
Dear Mr. Phillips,
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(704) 663-1699.
Sincerely,
for Robert B. Krebs
Surface Water Protection Regional Supervisor
Enclosure
cc: Gaston County Health Department
SWB
NcbEF R
N.C.Division of Water Quality,Mooresville Regional Office,610 East Center Avenue,Suite 301,Mooresville NC 28115 [phone] Customer Service
1-877-623-6748

United States Environmental Protection Agency Form Approved.
EPA Washington,D.C.20460 OMB No.2040-0057
Water Compliance Inspection Report Approval expires 8-31-98
Section A: National Data System Coding(i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 12Iu 2 L 31
NC0004961 111 121 07/05/30 117 18I J 19W 20u
Remarks
21IIIIII HIM IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII66
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA Reserved
671 2.0 169 70 14!!�� 711 N 72) N)J 731 I 174 751 I I I I I l 180
Section B: FacilityllJJ 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)
09:55 AM 07/05/30 05/03/01
Riverbend Steam Station
NC Hwy 16 Exit Time/Date Permit Expiration Date
Mount Holly NC 28120 11:23 AM 07/05/30 10/02/28
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Gregory Paul Phillips/ORC/704-263-3241/
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)
II Permit 1111 Flow Measurement •Operations&Maintenance Records/Reports
Self-Monitoring Program II Facility Site Review •Effluent/Receiving Waters •Laboratory
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Signature(s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Sonja Basinger MRO WQ//704-235-2202/
_-. V.-1/ p J�lAy Zfx;!
Sig ature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
. 1271k09—
Marcia occo MRO WQ//704-235-2204/
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete.
Page# 1

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 05/30/2007 Inspection Type: Compliance Evaluation
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? 001110
Is the facility as described in the permit? 1. 000
#Are there any special conditions for the permit? 0 0 • 0
Is access to the plant site restricted to the general public? ■ ❑ ❑ ❑
Is the inspector granted access to all areas for inspection? ■ ❑ ❑ ❑
Comment: The facility's permit is effective from March 1, 2005 through February 28,
2010.
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? ■ ❑ ❑ ❑
Is all required information readily available, complete and current? ■ ❑ ❑ ❑
Are all records maintained for 3 years(lab. reg. required 5 years)? ■ ❑ ❑ ❑
Are analytical results consistent with data reported on DMRs? ■ ❑ ❑ ❑
Is the chain-of-custody complete? ■ ❑ ❑ ❑
•
Dates,times and location of sampling ■
Name of individual performing the sampling ■
Results of analysis and calibration ■
Dates of analysis ■
Name of person performing analyses ■
Transported COCs ■
Are DMRs complete: do they include all permit parameters? ■ ❑ ❑ ❑
Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ ■ ❑
(If the facility is=or>5 MGD permitted flow) Do they operate 24/7 with a certified operator on each shift? 0 0 ■ 0
Is the ORC visitation log available and current? ■ ❑ ❑ ❑
Is the ORC certified at grade equal to or higher than the facility classification? ■ ❑ ❑ ❑
Is the backup operator certified at one grade less or greater than the facility classification? ■ ❑ ❑ ❑
Is a copy of the current NPDES permit available on site? ■ ❑ ❑ ❑
Facility has copy of previous year's Annual Report on file for review? 0 0 ■ 0
Comment: DMRs were reviewed from the period of June 2006 through March 2007.
No violations were reported for the review period.
Outfall 002A had no discharge during the review period.
Page# 3

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 05/30/2007 Inspection Type: Compliance Evaluation
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ■ ❑ ❑ ❑
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge 0 0 • 0
Judge, and other that are applicable?
Comment: The facility appeared well maintained and operated at the time of the
inspection. The facility staff were 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? 0 0 • 0
Incubator(BOD)set to 20.0 degrees Celsius+/- 1.0 degrees? 0 0 • 0 .
Comment: The on-site lab (certification# 5157) is field certified for pH and
temperature. Toxicity testing is performed by Environmental Testing Solutions. Duke
Energy Analytical Laboratory (certification #248) conducts all other analyses.
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? 0 0 ■ 0
Is flow meter calibrated annually? 0 0 ■ 0
Is the flow meter operational? 0 0 ■ 0
(If units are separated)Does the chart recorder match the flow meter? ❑ ❑ ■ ❑
Comment: Outfall 001 flow is measured using pump run times. Outfall 002 flow is
measured using weir and pond elevation measurements.
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? 0 0 ■ 0
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
Page# 4

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 05/30/2007 Inspection Type: Compliance Evaluation
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? 1. 000
Are the receiving water free of foam other than trace amounts and other debris? ■ n n n
If effluent (diffuser pipes are required) are they operating properly? 0 0 • 0
Comment: All ouffalls appeared to be well maintained and were readily accessible. No
adverse impacts to the receiving waters were observed.
Upstream/ Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit(frequency,sampling type, and sampling location)? ■ 0 0 0
Comment:
Page# 5

Qom.I
9 Michael F.Easley,Gove /yl�
QG William G.Ross Jr.,Secretary 1 Iv`
fNorth Carolina Department of Environment and Natural Resources
1 )1--C3( 1.
'C Alan W.Klimek,P.E.Director
Division of Water Quality
July 18, 2006
Mr. Gregory Phillips
Duke Power River Bend Steam Station
175 River Bend Road
Mt. Holly,NC 28120
Subject: Compliance Evaluation Inspection
Duke Power River Bend Steam Station
NPDES Permit No. NC0004961
Gaston County,NC
Dear Mr. Phillips:
Enclosed is a copy of the Compliance Biomonitoring Inspection Report for the inspection
conducted at the subject facility on July 18,2006 by Mr. John Lesley of this Office. The operation
and maintenance of the facility are commendable. Toxicity test results will be forwarded under
separate cover when available.
The report should be self-explanatory;however, should you have any questions concerning
this report, please do not hesitate to contact Mr. Lesley or me at(704) 663-1699.
Sincerely, �-
t
i :7-'t„.„-----
D. Rex Gleason, P.E.
�, Surface Water Protection Regional Supervisor
Enclosure
cc: Central Files
Gaston County Health Department
•
JL
AFL, Nofle Carolina
NCDENR Naturally
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%Recycled/10%Post Consumer Paper

J�`SEO STgTFs ArrA
Form A
United States Environmental Protection Agency,Washington, DC 20460'' !� NPDES Compliance Inspection Report ` OMB No.20
I _`_Q North Carolina Department of Environment and Natural Resources NCDENR Approval Expires
;.«�T,C pRoZE- Division of Water Quality,Mooresville Regional Office E..,"'o..E '�:� „.E .Es 7/31/85
Section A: National Data System Coding
Transaction Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector Facility Type
N 5 NC0004961 06/07/18 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 am March 1,2005
Duke Power Riverbend Steam Station Exit Time:
Hwy 16, Mount Holly 11:35 am Permit Expiration Date:
Gaston County,North Carolina Date: February 28,2010
07/18/2006
Name(s)of On-Site Representatives Title(s) Phone No(s):
Gregory Phillips/ORC/ 704-263-3241
Steve Jones/Backup ORC/980-722-9327(cell)
Name and Address of Responsible Official: Title:
Gregory Phillips ORC
Duke Power River Bend Steam Station Phone No. Contacted?
175 Steam Station Road 704-263-3241 Yes
Mt. Holly,NC 28120
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 Z 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:
`,_ />-7 �- DWQ-SWP/MRO/[phone] FAX: [phone] July 18,2006
J Lesley J
Signature of Reviewer: Agency/Office Date:
Regulatory Office Use Only
Action Taken Date:
Noncompliance
Compliance
EPA Form 3560-3 (Revised 3-85)Previous Editions are Obsolete

Duke Power Riverbend Steam Station
NPDES Permit No. NC0004961
Page 2
Permit:
The facility's NPDES Permit expires February 28, 2010.
Facility Site Review:
The treatment facility (ash basin) is classified as a Physical/Chemical I treatment system.
Laboratory:
On-Site Lab, Field Parameter Certification# 5157: All calibration logs are properly maintained.
Duke Power Environmental Services,Certification# 248 —Not evaluated
Environmental Testing Solutions—Toxicity Testing—Not evaluated
Effluent/Receiving Waters:
Outfall 001 (once through cooling water) did not appear to have an impact on the
receiving stream.
Outfall 002 Ash basin: Effluent was clear with no foam or suspended solids. Grab
samples of the effluent were collected for use in a chronic Ceriodaphnia dubia pass/fail toxicity
test. Toxicity test results will be forwarded under separate cover when available.
Outfall 002A—no discharge
Self-Monitoring Program:
Monthly monitoring reports were reviewed for the period of June 2005 through May
2006. No violations were reported during the period.
Records/Reports:
All records and reports were maintained in accordance with permit requirements. The
ORC log was complete and up-to-date.

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 INI 2 151 31 NC0004961 111 121 11/04/28 117 1811 191 s1 201 II
Remarks •
211 I I I I I I I 1 1 1 1 I I I I I I I I I I I I I I I I I I I I I I I I 1 1 1 1 I I I I 1 1 166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA -
671 1.5 169 701 41 711 NI 721 N I 73I I 174 761 1 1 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)
10:50 AM 11/04/28 11/03/01
Riverbend Steam Station
NC Hwy 16 Exit Time/Date Permit Expiration Date
• Mount Holly NC 28120 01:05 PM 11/04/28 15/02/28
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Robert Steven Jones/ORC/704-263-3242/
Name,Address of Responsible Official/Title/Phone and Fax Number
Jimmie Allen Stowe,526 S Chruch St Charlotte NC Contacted
282011002//704-382-4309/7043829840 No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated) •
.Permit El Flow Measurement •Operations&Maintenance II Records/Reports
II Self-Monitoring Program El Sludge Handling Disposal •Facility Site Review •Effluent/Receiving Waters
Laboratory Storm Water
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s)and Signature(s)of Inspectors Agency/Office/Phone and Fax Numbers Date
Wesley N Bell MRO WQ//704-663-1699 Ext.2192/ Gj / '
Sig ature of Management Q R fewer Agency/Office/Phone and Fax Numbers Date
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 (cunt.)
31 NC0004961 I11 12I 11/04/28 I17 18ICI
Section D: Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
STORMWATER:
The facility has several stormwater outfalls that discharge into waters of the State. Three of these
stormwater outfalls (1, 2, 6) are equipped with an oil/water separator tank. The facility staff operate under
an internal stormwater management program that includes outfall and drainage area
identifications/descriptions, stormwater management practices, and visual/analytical monitoring. The
Division is in the process of permitting the stormwater discharges at the Duke Energy Steam Stations under
separate Stormwater Permits.
•
Page# 2

Ertel, Debbie
From: Parker, Michael
Sent: Friday, November 09, 2012 10:38 AM
To: Allocco, Marcia
Cc: Bou-ghazale, Samar; Ertel, Debbie
Subject: FW: Public Records Request ■--,�,
Attachments: public records River Bend Steam Station.pdf; ATT00001.c
I have already discussed this matter with Susan Massengale. Instead of making copies of everything we have, it may be
better if we " Susan is fine with that and I have
also spoken with Debbie Erte about it, As you can see, the deadline is the 231{, but since that is a State Holiday, we
technically only have until th to get this done and sent up to Michele. If we do send this up on a CD, 411111.1111111111.
efore we send it up. They are only wanting fro a,so it may not be a
lot to scan. I don't know how to download our emails, so someone else will have to do that.
From: Edmonds, Angela
Sent: Monday, November 05, 2012 3:26 PM
To: Grogan, Patrick; Morris, Sean; Sorensen, Heather B; Bradford, Teresa; Wagner, Bill; Ingle, Bruce; Khan, Zahid;
Parker, Michael; Parris, Bruce; Pitner, Andrew; Setzer, Britt; Slack, Ron; Taraban, Ron; Watkins, Jason
Subject: FW: Public Records Request - Riverbend Steam Station
Please review the below information request and provide any information you may have to Michele Walker per her
instructions.
From: Inman, Lloyd [mailto:[e-mail]]
Sent: Monday, November 05, 2012 3:15 PM
To: NCDENR.DENR.ADM.RO-Managers
Subject: FW: Public Records Request - Riverbend Steam Station
Please let Michele know if you have any records.
From: Walker, Michele
Sent: Monday, November 05, 2012 12:42 PM
To: Abraczinskas, Michael; Holman, Sheila; Mather, Tom; Cary, William P; Freeman, Dee; Frye, Harlan; Inman, Lloyd;
Jones, Lori; Barsness, Kari K; Kees, Diana; Knight, David; Kritzer, Jamie; Hardison, Lyn; Mcgee, Melba; Smith, Robin;
Taylor, Kenneth; Thompson, Mary P.; Ozer, Trina S; West, Wanda; Munger, Bridget; Wakild, Chuck; Bownes, Janice H;
Massengale, Susan; Jackson, Donna; Fransen, Tom; Godreau, Jessica; Peele, Linwood; Reeder, Tom; Midgette, Robert;
Young, Sarah; Wilson, Nat; Nicholson, Bruce; Akroyd, Cathy R; Matthews, Dexter; Cannon, Elizabeth; Nicholson, Grover;
Murray, Holly; Butler, Jack; Culpepper, Linda; Paul Crissman
Cc: Kritzer, Jamie
Subject: Public Records Request - Riverbend Steam Station
Please see the attached Public Records Request from Southern Environmental Law Center re: DENR records from
January 1, 2009 to present, pertaining to Duke Energy's Riverbend Steam Station.
Please provide any records your division may have to me by close of business on Nov. 23. I will coordinate getting the
documents to SELC. Let me know if you have any questions.
Thanks very much,
Michele
1

37
4� F9 Michael F.Easley,Governor
Pc, William G.Ross Jr.,Secretary
co d DWG(
[ North Carolina Department of Environment and Natural Resources
3
Alan W.Klimek,P.E.Director
Division of Water Quality
December 15, 2004 fit;L. -.4T
AND tr JRCES
5157 MOOR? °..OFFICE
Ms. Penny Franklin
Duke Energy Riverbend Steam Station
MGO3A2 DEC 1 6 2004
Hagers Ferry Rd.
Huntersville, NC 28078-
SUBJECT: Wastewater/Groundwater Laboratory Certification Renewal p�
FIELD PARAMETERS ONLY WAIL�,,,�,... i IN 4ECTTO1
Dear Ms. Franklin:
The Department of Environment and Natural Resources, in accordance with the provisions of NC GS 143-215-
.3 (a) (10), 15 NCAC 2H .0800, is pleased to renew certification for your laboratory to perform specified
environmental analyses required by EMC monitoring and reporting regulations 15 NCAC 2B .0500, 2H .0900 and
2L .0100, .0200, .0300, and 2N .0100 through .0800.
Enclosed for your use is a certificate describing the requirements and limits of your certification. Please review
this certificate to insure that your laboratory is certified for all parameters required to properly meet your
certification needs.
Please contact us at 919-733-3908 if you have questions or need additional information.
Sincerely,
James W. Meyer V'ek
Laboratory Section
Enclosure
cc: Chet Whiting
Mooresville Regional Office
North Carolina
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
IS
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
Y �n r
O
aik.,i .,.. :t 4,4,INIL...,,%.,.. _ %
� -•Yi ,i- rM n
:_ -_:',..
a ' r � y t l) r 1 ,, �
^AR 12.117b \ //
`,• ss£ Vl � iGQlAM
DUKE ENERGY RIVERBEND 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. 5157 �//���� --
James W. Meyer

Attachment
North Carolina Wastewater/Groundwater Laboratory Certification
Certified Parameters Listing
FIELD PARAMETERS ONLY
_ab Name: Duke Energy Riverbend Steam Station Certificate Number: 5157
4ddress: MGO3A2 Effective Date: 01/01/2005
Hagers Ferry Rd. Expiration Date: 12/31/2005
Huntersville, NC 28078-
Date of Last Amendment:
The above named laboratory,having duly met the requirements of 15A NCAC 2H.0800,is hereby certified for the measurement of the parameters listed below.
CERTIFIED PARAMETERS
INORGANICS
off
Std Method 4500 H B
TEMPERATURE
Std Method 2550E
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.

Duke WILLIAM F. HALL, III
Group Vice President
Power® Fossil-Hydro Generation
Duke Power
EC11 P/526 South Church Street
Charlotte, NC 28202-1802
704 382 3940
704 382 9840 fax
[e-mail]
October 26, 2005 f r
OCT 3 12005
NC DEPT.O F E€VIROtW. i
Ms. Coleen Sullins AND NATURAL UR&L RESOURCES
Permits and Engineering Unit SACIORESVILLE PAGIONAL OFFICE
North Carolina Department of Environmental,
Health and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJECT: Delegation of Authority- Requested Information
Duke Energy NPDES Permitted Stations
Notification of Mail Code Address Change
Dear Ms. Sullins:
Duke Power requests the State's databases be revised to reflect that all correspondence and
requested information related to the permits specified in the attached list be addressed to Mr. J.
Allen Stowe — Mail Code EC13K, Duke Energy Corporation, P.O. Box 1006, Charlotte, NC 28201-
1006. This will prevent any delays of correspondence associated with NPDES permits.
If you have questions or need additional information, please contact Mr. Stowe at 704-382-4309.
Sincerely,
Bill Hall
GVP Fossil/Hydro Generation
Duke Power
Attachment
cc: Rex Gleason, NCDENR, Mooresville, NC
David Goodrich, NCDENR, Raleigh, NC
Steve Mauney, NCDENR, Winston-Salem, NC
Forest Westall, NCDENR, Asheville, NC
www.dukepower.corn

4 4ti
,,.._
Permits Currently Held:
Allen Steam Station - NC0004979
Belews Creek Steam Station - NC0024406
Belews Creek Steam Station - WQ0005873
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
rhand Ctaa tion - NC0004961
Bridgewater Hydro a ANCG500102
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
tars: r.r'C 1 L , iiii

V
Division of Water Quality orc DEPT.Cr ENVIRONMENT
AND NAT'.' 9ESOURCES
1
September 2, 2004 MDORE�t •'".OFFICE
MEMORANDUM SEP 0 9 200A
To: Rex Gleason
Water Quality Supervisor,MRO
WATE }{
4,„v 1 ION
Through: Matt Matthews r
Supervisor, Aquatic Toxicology Unit
From: Sandy Mort Lam/
Quality Assurance Officer, Aquatic Toxicology Unit
Subject: Whole effluent toxicity test results
Duke Power-River Bend 002
NPDES Permit#NC0004961/002
Gaston County
The aquatic toxicity test using grab samples of effluent discharged from Duke Power-River Bend
002 has been completed. Duke Power-River Bend 002 has an effluent discharge permitted at
5.98 million gallons per day(MGD) entering Catawba River(7Q10 of 80.0 CFS). Whole
effluent samples were collected on August 24 and 27, 2004 by John Lesley for use in a chronic
Ceriodaphnia dubia pass/fail toxicity test. The test using these samples resulted in a pass.
Toxicity test information follows.
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentrations 10% sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 25.8 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 23.3 neonates
First Sample pH 7.10 SU
First Sample Conductivity 182 micromhos/cm
First Sample Total Residual Chlorine <0.0052 mg/L
Second Sample pH 7.17 SU
Second Sample Conductivity 183 micromhos/cm
Second Sample Total Residual Chlorine <0.0052 mg/L
Test results for these samples indicate that the effluent would not be predicted to have water
quality impacts on receiving water. Please contact us if further effluent toxicity monitoring is
desired. We maybe reached at(919) 733-2136.
Basin: CTB33
cc: Central Files
Environmental Sciences Section Water Quality Section

N'A
KM:.Jr Secre
ci
North Carolina C/c irintcnt t+fL•m•tmnmmt and Natural Itexour
Alan\V Klimek. E Dire
> r %RW! ftv`YSI y Devtsroo or water (Air
I\ l C(.ic�;H Culltna.:Dettut% Dor
rhvIstoti or\\•Iller purl
September 14, 2004
Mr. Michael Ruhe
Manager, Water Quality
Duke Energy Corporation
Post Office Box 1006 (EC11E)
Charlotte,North Carolina 28201-1006
Subject: Toxicity Test Results
Duke Power Riverbend Steam Station
NPDES Permit No. NC0004961
Gaston County,NC
Dear Mr. Ruhe:
Enclosed is a copy of the toxicity test results relative to the inspection conducted at the
subject facility on August 24, 2004 by John Lesley of this Office. Outfall 002 (ash basin
discharge) samples were collected on August 24 and 27, 2004 by Division staff for use in a chronic
Ceriodaphnia dubia pass/fail toxicity test. The test utilizing these samples resulted in a pass.
The report should be self-explanatory;however, should you have any questions concerning
this report, please do not hesitate to contact Mr. Lesley or me at(704) 663-1699.
Sincerely,
eQL ear
'j D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Enclosure
cc: Central Files
Kevin Bowden,Aquatic Toxicology-Unit
Gaston County Health Department
.ate
N orth Carolina �fr
,Xatirrallrl NZDEINO
N.C.Division of Wat-Quality, Mooresville Regonal Oinw, 919 North Main Stre--t, Mooresville NC 28115 (704)615:-1699 Cu orne--S^vi
-€77-62S-6748

Duke Power Riverbend Steam Station
NPDES Permit No. NC0004961 outfall 002
Page 2
Whole effluent samples were collected on August 24 and 27, 2004 by John Lesley for use
in a chronic Ceriodaphnia dubia pass/fail toxicity test. Duke Power Riverbend Steam Station
outfall 002 has an effluent discharge permitted at 5.98 MGD entering the Catawba River(7Q10 of
80.0 CFS). The test using these samples resulted in a pass. Toxicity test information follows:
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentration 10%sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 25.8 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 23.3 neonates
First Sample pH 7.10 SU
First Sample Conductivity 182 micromhos/cm
First Sample Total Residual Chlorine <0.0052 mg/1
Second Sample pH 7.17 SU
Second Sample Conductivity 183 micromhos/cm
Second Sample Total Residual Chlorine • <0.0052 mg/1
Test results for these samples indicate that the effluent would not be predicted to have
water quality impacts on the receiving stream.

Ar9r, A
NCDENR r(?eftt
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor William G. Ross,Jr., Secretary
Alan W. Klimek, P.E., Director
August 26, 2004
Mr. Michael Ruhe
Manager, Water Protection
Duke Energy Corporation
13339 Hagers Ferry Road (MG035A)
Huntersville, North Carolina 28078-7929
Subject: Compliance Biomonitoring Inspection
Duke Power River Bend Steam Station
NPDES Permit No. NC0004961
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 August 24, 2004 by Mr. John Lesley of this Office. Operation
and maintenance of the facility are commendable. 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,
\(,-) D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Enclosure
cc Central Files
Gaston County Health Department
Mooresville Regional Office One
919 North Main Street,Mooresville North Carolina 28115 North Carolina
Phone: [phone] /FAX [phone]/Internet::h2o.enr.state.nc.us Naturally f
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper

STA,
es United States Environmental Protection Agency. Washington , DC 20460 A7..igir Form Approved
▪ �, NPDES Compliance Inspection Report �/ OMB No. 2040-0003
▪ �Q North Carolina Department of Environment and Natural Resources pP A royal Expires
c�,�E Division of Water Quality, Mooresville Regional Office NCDENR 7.3 I.'S5
Section A: National Data System Coding
Transaction Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector Facility Type
N 5 NC0004961 04/08/24 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: 10:30 am July 1,2002
Duke Power Riverbend Steam Station Exit Time:
Hwy 16, Mount Holly 11:30 am Permit Expiration Date:
Gaston County,North Carolina Date: February 28,2005
04/08/24
Name(s)of On-Site Representatives-------Title(s)----Phone No(s):
Gregory Phillips/ORC/ 704-263-3241
Name and Address of Responsible Official: Title:
Michael Ruhe Manager- Water Protection
Duke Energy
Post Office Box 1006(EC11E) Phone No'^ Contacted?
Charlotte,North Carolina 28201-1006 980 373 3_�1 No
Section C:
Areas Evaluated During Inspection
® Permit ® Flow Measurement ® Operations&Maintenance ❑ Sewer Overflow
® Records/Reports ® Self-Monitoring Program ❑ Sludge Handling/Disposal ❑ Pollution Prevention
® Facility Site Review ❑ Compliance Schedules ❑ Pretreatment Program ❑ Multimedia
® Effluent/Receiving Waters ❑ Laboratory ❑ Stormwater ❑ Other:
Section D: Summary of Findings/Comments
See Attached Sheet(s) for Summary
Toxicity test results will be forwarded under separate cover when available.
Signature(s)of Inspector(s): Agency/Office/Telephone: Date:
,
���,,,, DENR-DWQ/MRO/[phone] FAX: [phone] August 26 2004
J6hn'Leslev
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 Riverbend Steam Station
NPDES Permit No.NC0004961
Page 2
Permit:
The facility's NPDES Permit expires February 28, 2005. Be advised that Part II, Section
B, paragraph 10 of the permit states that a permit renewal application with the required fees be
submitted at least 180 days prior to the expiration of the permit.
Facility Site Review:
The facility uses CO2 to adjust pH in the ash basin (outfall 002). The treatment system is
physical/chemical treatment system.
Laboratory:
Field Parameter Certification# 5157
Duke Power Environmental Services Certification#248
Prism Labs Certification#402
Effluent/Receiving Waters:
The (outfall 002) effluent was clear with no foam or suspended solids. Grab samples of
the effluent were collected for use in a chronic Ceriodaphnia dubia pass/fail toxicity test.
Toxicity test results will be forwarded under separate cover when available.
Outfall 001 (once through cooling water) did not appear to have an impact on the
receiving stream.
See Attached Check List

Permit: NC0004961 Owner-Facility: Duke Energy Corporation-Riverbend Steam Station
Inspection Date: 08/24/04 Inspection Type: Bioassay Compliance
Permit Yes No NA NF
(If the present permit expires in 6 months or less). Has the permittee submitted a new application? N ❑ ❑ ❑
Is the facility as described in the permit? • ❑ ❑ ❑
Are there any special conditions for the permit? N ❑ ❑ ❑
Is access to the plant site restricted to the general public? • 0 0 0
Is the inspector granted access to all areas for Inspection? • 0 0 0
Comment:
Operations&Maintenance YPs Nn NA NF
Does the plant have general safety structures in place such as rails around or covers over tanks,pits,or wells? N ❑ ❑ ❑
Is the plant generally clean with acceptable housekeeping? N ❑ ❑ ❑
Comment:
jagoons Yes Nn NA NF
Type of lagoons?
Number of lagoons in operation at time of visit? 2
Are lagoons operated in? Series
Is a re-circulation line present? 0 0 • 0
Is lagoon free of excessive floating materials? N ❑ ❑ ❑
Are baffles between ponds or effluent baffles adjustable? 0 0 • 0
Are dike slopes clear of woody vegetation? • ❑ ❑ ❑
Are weeds controlled around the edge of the lagoon? • ❑ ❑ ❑
Are dikes free of seepage? • ❑ ❑ ❑
Are dikes free of erosion? ❑ ❑ ❑
Are dikes free of burrowing animals? ■ ❑ ❑ ❑
Are sludge levels appropriate? 0 0 • 0
Has the sludge blanket in the lagoon(s)been measured periodically in multiple locations? 00 . 0
If excessive algae is present,has barley straw been used to help control the growth? ❑ ❑ E ❑
Is the lagoon surface free of weeds? ■ ❑ ❑ ❑
Is the lagoon free of short circuiting? ■ ❑ ❑ ❑
Comment:Duke Power Riverbend ash basin is a physical/chemical treatment system
Record Keeping Yes Nn NA NF
Are records kept and maintained as required by the permit? . 000
Is all required information readily available,complete and current? ❑ ❑ ❑
Are all records maintained for 3 years(lab.reg.required 5 years)? R ❑ ❑ ❑
Are analytical results consistent with data reported on DMRs? N ❑ ❑ ❑
Are sampling and analysis data adequate and include: U ❑ ❑ ❑
Dates,times and location of sampling II
Name of individual performing the sampling I.
Results of analysis and calibration III
Dates of analysis III
Name of person performing analyses II
Transported COCs U
Plant records are adequate,available and include N ❑ ❑ ❑
O&M Manual 0

Permit: NC0004961 Owner-Facility: Duke Energy Corporation-Riverbend Steam Station
Inspection Date: 08/24/04 Inspection Type: Bioassay Compliance
Record Keeping Yes No NA NF
As built Engineering drawings ❑
Schedules and dates of equipment maintenance and repairs •
Are DMRs complete:do they include all permit parameters? • ❑ ❑ ❑
Has the facility submitted its annual compliance report to users? ❑ ❑ • ❑
(If the facility is=or>5 MGD permitted flow)Do they operate 24/7 with a certified operator on each shift? 0 0 • 0
Is the ORC visitation log available and current? 11000
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? U ❑ ❑ ❑
Is the facility description verified as contained in the NPDES permit? U ❑ ❑ ❑
Does the facility analyze process control parameters,for example:MLSS,MCRT,Settleable Solids,DO,Sludge • ❑ ❑ ❑
Judge,pH,and others that are applicable?
Facility has copy of previous year's Annual Report on file for review? ❑ ❑ U ❑
Comment:Process Control: pH,Settleable Solids
Fffbtent Sampling Yes No NA NF
Is composite sampling flow proportional? ❑ ❑ U ❑
Is sample collected below all treatment units? U ❑ ❑ ❑
Is proper volume collected? ROOD
Is the tubing clean? 0 0 ■ 0
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)? MOOD
Comment:All samples are grab samples that are shipped on ice.

Michael F.Easley,Gove,�
G William G.Ross Jr.,Secretary J
• North Carolina Department of Environment and Natural Resources
(414,1
i
ro,7,9
—{ Alan W.Klimek.P.E.,Director
Division of Water Quality
Coleen H.Sullins,Deputy Director
Division of Water Quality
August 27, 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 River Bend Steam Station
NPDES Permit No. NC0004961
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 August 22, 2003 by Mr. John Lesley of this Office. Operation
and maintenance of the facility are commendable. Please inform the facility's Operator-in-
Responsible Charge of our findings by forwarding a copy of the enclosed report.
The report should be self-explanatory; however, should you have any questions concerning
this report, please do not hesitate to contact Mr. Lesley or me at(704) 663-1699.
Sincerely,
D. Rex Gleason,P.E.
Water Quality Regional Supervisor
Enclosure
cc Central Files
Gaston County Health Department
JL .
tot iFit.ji
NCDEr4R
Mooresville Regional Office,919 North Main Street,Mooresville,North Carolina 28115
Phone [phone] Customer Service
Fax [phone] 1-877-623-6748

s^F United States Environmental Protection Agency,Washington,DC 20460 Form Approved
,A s NPDES Compliance Inspection Report AAA OMB No. 2040-0003
t `_ North Carolina Department of Environment and Natural Resources -r Approval Expires
FNr, 1Q Division of Water Quality,Mooresville Regional Office NCDENR 7/31/85
Section A: National Data System Coding
Transaction Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector Facility Type
N 5 NC0004961 03/08/22 B S 2
Inspection Work Days Facility Self-Monitoring Evaluation Rating BI QA ....Reserved
3 5 N N
Section B: Facility Data
I Entry Time: Permit Effective Date:
Name and Location of Facility Inspected: 10:05 February 1,2002
Duke Power River Bend Steam Station Exit Time:
Highway 16,northeast of Mount Holly 11:05 Permit Expiration Date:
Gaston County,North Carolina Date: January 31,2005
03/08/22
Name(s) of On-Site Representatives Title(s) Phone No(s):
Gregory P.Phillips/ORC/704-263-3241
Name and Address of Responsible Official: Title:
Mr.Michael A.Ruhe Manager,Water Protection
Duke Energy Corporation Phone No. Contacted?
PO Box 1006(EC11E) 704 373-3231 No
Charlotte,North Carolina 28201-1006
Section C:
Areas Evaluated During Inspection
►� Permit ® Flow Measurement ® Operations&Maintenance ❑ Sewer Overflow
®Records/Reports ® Self-Monitoring Program ❑ Sludge Handling/Disposal ❑ 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
Chronic toxicity test results will be forwarded under separate cover when available.
Signature(s) of Inspector(s): Agency/Office/Telephone: Date:
John Lesley DENR-DWQ/MRO/[phone] FAX: [phone] August 27,2003
Signature of Reviewer: Agency/Office Date:
•
Regulatory Office Use Only
Action Taken Date:
Noncompliance
Compliance
EPA Form 3560-3 (Revised 3-85)Previous Editions are Obsolete

Duke Power River Bend Steam Station
NPDES Permit No.NC0004961
Page 2
John Lesley last inspected this facility on September 17, 2002.
Permit:
The facility is permitted for the following outfalls:
Outfall 001: Discharge of once through cooling water from the intake screen backwash,
chiller system water, turbine lube oil coolers, condensate coolers, main steam turbine condensers,
and intake tunnel dewatering sump.
Outfall 002: Ash pond discharge. Sources of water entering the ash pond are induced
draft fan and preheater bearing cooling water, stormwater runoff,treated groundwater, track
hopper sump discharge(groundwater), coal pile runoff, laboratory drains, chemical make up
tanks, drum rinse wastewater, ash transport water, sanitary wastewater,metal cleaning waste,
chemical metal cleaning waste, and turbine and boiler room sumps.
Outfall 002A: Yard sump overflow discharges.
Facility Site Review/Operations and Maintenance:
Outfall 001 also appeared to be well maintained. A baffle is in place across the canal to
prevent foam(entrained air) from entering Mountain Island Lake. No sheen was visible on the
discharge. The ash basin(002) also appeared to be well maintained and operated. Dams were
mowed and well grassed and baffles were in place to prevent discharge of floating scum on
portions of the ash basin. Outfall 002A has not discharged in the previous 12-month period.
The ORC has a Grade I Physical-Chemical Certification and all designated back up
ORCs are adequately certified for the operation of this facility.
Laboratory:
The on-site laboratory conducts temperature and pH monitoring. The calibration log for
pH measurement was complete and up-to-date. Temperature is measured by means of a
resistance temperature detector(RTD) located at outfall 001. The RTD is calibrated annually.
Field Parameter Certification has been obtained for temperature and pH measurement
(Certification No. 5157).
Records and Reports:
Records and reports consist of ORC logs, discharge monitoring reports, laboratory
analysis reports, chain of custody forms, and calibration records. All records and reports were
readily accessible.

Duke Power River Bend Steam Station
NPDES Permit No.NC0004961
Page 3
Self-Monitoring Program:
Monthly self-monitoring reports were reviewed for the period June 2002 through May
2003. No violations were reported during the period.
Grab samples are collected and placed on ice immediately then shipped to the Duke
Energy Environmental Center for analysis.
Effluent/Receiving Waters:
The discharges (outfalls 001 and 002)were clear with no traces of suspended solids or
foam. The effluents are discharged to the Catawba River. No adverse impacts resulting from the
discharges were observed. Grab samples were collect at outfall 002 on August 18 and 22, 2003
for use in a chronic Ceriodaphnia dubia pass/fail toxicity test. Toxicity test results will be
forwarded under separate cover when available.
Flow Measurement:
Flow measurement is consistent with NPDES Permit requirements. Outfall 001: Flow is
calculated from pump log data. Outfall 002: Flow is measured by means of a staff gauge.
Sludge Disposal:
Ash is collected in the ash basin and disposed of in accordance with Ash Reuse Permit
No. WQ0000452.

Duke „.V FOSSIL-HYDRO GENERATION
Power®
Duke Power
A Duke Energy Company �1 n S EC11E/526 South Church Street
(� Charlotte, NC 28202-1802
July 17, 2003 \\
Ms. Sonja Williams NC DEFT OF Ef1VdRONraENj
Mooresville Regional Office qNp
North Carolina Department of Environment and Natural Resources �OREs�vtl t RE�URCE3
GIOldAI.OFFICE
919 North Main Street Pr-
Mooresville, NC 28115
Subject: Duke Power Company JUL 2 1 2003
Riverbend Steam Station
NPDES Permit Number NC0004961
WATEP
Dear Ms. Williams:
On July 14, 2003, a clogged storm drain inlet resulted in rainfall run-off overflowing into
Mountain Island Lake. This storm drain is located in a section of the coal yard. This area
is designed to drain to the yard drainage sump, which pumps wastewater into the
wastewater treatment system (NPDES outfall 002). Mr. Richard Bridgeman of
NCDENR was notified on July 14, 2003, of this discharge.
The overflow stopped within 10 minutes from the time of discovery. It is estimated that
50 gallons of wastewater was discharged during this time period. Corrective measures
have been put in place. These measures include unplugging the storm drain inlet,
installing a ditch and berm to divert the rainfall run-off into the drain that discharges into
the yard drainage sump.
If you need additional information or have questions, please contact either Robert Wylie
at 704 382-4669 or Steve Jones at 704 263-3242.
Sincerely,
01 GO- 1,t
Michael A. Ruhe, Manager
Environmental Support
www.duke-energy.com

Plij
Duke /J Duke Power Company
Power. 1( Fossil and Hydro Generation Departmeni
1006
A Duke Energy Company 11 Charlotte,Box N
46,V� NC 28201-1000
December 30, 2002
Mr. David Goodrich J RECEIVED
North Carolina Department of Environment
and Natural Resources DEC 3 1 2002
Division of Water Quality
1617 Mail Service Center NC DEPT OF ENVIRONMENT
Raleigh, North Carolina 27699-1617 AND NATURAL RESOURCES
MOORESVILLE REGIONAL OFFICE
Subject: Riverbend Steam Station
Gaston County
NPDES Permit# NC0004961
Ash Basin Capacity Verification
Dear Mr. Goodrich:
With reference to the subject NPDES permit, Special Condition A (8) requires that the ash
basin be evaluated and a report submitted to your office that ensures adequate volume
exists to contain solids, rainfall runoff and the maximum dry weather flow. The attached
calculations indicate that the ash basin is projected to have sufficient available capacity
through the year 2005. Thus, adequate volume exists for the term of the present NPDES
permit (February 28, 2005). The next update will be coordinated with submittal of the
NPDES permit renewal application.
If you have questions or need additional information please contact me at [phone].
Sincerely,
Ronald E. Lewis, Scientist
Environmental, Health and Safety
Fossil-Hydro Carolinas
cc: Rex Gleason, NCDENR - Mooresville Regional Office

Duke Power Company
Riverbend Steam Station —Ash Basin Forecasting
2002 Wet Weather Detention Volume Calculation
Determination of Wet Weather Detention Volume: Wet Weather Detention Volume is
the sum of the runoff accumulated in the ash basin which results from a 10-yr 24-hr
storm (assuming 100% runoff) plus the maximum 24-hr dry weather waste stream which
discharges to the Ash Basin (refer to NPDES Permit NC0004961)
I. Estimate Runoff to the Ash Basin from a 10-yr 24-hr storm:
1. Natural Drainage Area of Ash Basin = 98.7 Acres
Station Yard Drainage Area Pumped to Ash
Basin = 21.8 Acres
Total = 120.5 Acres
2. Precipitation from 10-yr 24-hr storm = 5.0 Inches
3. Total Stormwater Runoff to Ash Basin = 50.21 Acre-feet
(Assuming 100% runoff)
II. Estimated Maximum 24-hr Dry Weather Waste Stream Discharging to Ash Basin:
1. Maximum recorded Ash Basin Discharge = 10,660,000 Gallons/day
2. Increase maximum daily discharge by 10% for
conservatism and convert units to acre-feet = 35.98 Acre-feet
III. Wet Weather Detention Volume:
Sum of Parts I.
and II. = 86.19 Acre-feet

Duke Power Company
Riverbend Steam Station -Ash Basin Forecasting
2002 Wet Weather Detention Volume Calculation
IV. Estimated Quantity of Solids (Ash) to be discharged to Ash Basin through December
31, 2005. Note: NPDES Permit expiration date is 2/28/05.
Estimated
Actual or Ash Estimated
Estimated Coal Production Ash
Consumption (1000's Production
Time Period (1000's tons) % Ash tons) (Ac-ft) *
6/1/1995 -
12/31/1995 238.4 8.15% 19.91 16.62
1996 724.5 9.17% 66.43 55.46
1997 684.3 8.97% 61.38 51.24
1998 633.2 9.89% 62.62 52.27
1999 617.1 9.92% 61.22 51.11
2000 988.6 9.84% 97.25 81.18
2001 905.7 11.79% 106.78 89.14
1/1/2002 -
10/31/2002 649.9 11.87% 77.14 64.39
11/1/2002 -
12/31/2002 130 11.80% 15.34 12.81
2003 1386 11.80% 163.58 136.55
2004 1451 12.30% 178.50 149.01
2005 1344 12.30% 165.28 137.98
Total 8409.12 910.15 759.79
* Calculation assumes an in-place ash density of 55 lbs. per cubic foot.

Duke Power Company
Riverbend Steam Station —Ash Basin Forecasting
2002 Wet Weather Detention Volume Calculation
V. Estimated Total Storage Volume Required through 2002:
Wet Weather Detention Volume = 86.2 Acre-feet
Estimated Solids to Ash Basin = 759.8 Acre-feet
2000 Ash Removal Project (354,450 tons) = -295.9 Acre-feet
Total = 550.1 Acre-feet
VI. Results:
Available Storage based on basin survey dated 6/1/1995:
Primary Cell 303.7 Acre-feet
Secondary
Cell 378.3 Acre-feet
Total= 682.0 Acre-feet
Required Storage Volume:
Through 12/31/2005 = 550.1 Acre-feet
Based on these calculations, there is sufficient capacity in the ash basin to provide
the retention volume specified in the permit through the year 2005.

OF W ATFR Michael F.Easley,Governor
QG William G.Ross Jr.,Secretary
North Carolina Department of Environment and Natural Resources
j Alan W.Klimek,P.E.,Director
Division of Water Quality
September 27,2002
Mr.Michael Ruhe
Duke Energy Corporation
Post Office Box 1006 (EC11E)
Charlotte,North Carolina 28201-1006
Subject: Toxicity Test Results
Duke Power Company River Bend Steam Station
NPDES Permit No. NC0004961
Gaston County,NC
Dear Mr.Ruhe:
Enclosed is a copy of the toxicity test results relative to the inspection conducted at the
subject facility on September 17,2002 by John Lesley of this Office. Effluent Samples were
collected on September 17 and 20,2002 by Division staff for use in a chronic toxicity test. The
test utilizing these samples resulted in a pass.
The report should be self-explanatory;however, should you have any questions concerning
this report,please do not hesitate to contact Mr. Lesley or me at(704) 663-1699.
Sincerely,
cPVD. Rex Gleason,P.E.
' Water Quality Regional Supervisor
Enclosure
•
cc: Central Files
Kevin Bowden,Aquatic Toxicology Unit
•
Gaston County Health Department
NCDENR
N. C.Division of Water Quality 919 North Main Street,Mooresville NC 28115 Phone[phone]
FAX [phone]

Duke Power River Bend Outfall 002
NPDES Permit No.NC0004961
Page 2 -
Whole effluent samples were collected on September 17 and 20, 2002 by John Lesley for
use in a chronic Ceriodaphnia dubia pass/fail toxicity test. Duke Power River Bend outfall 002 has
an effluent discharge permitted at 5.98 MGD entering the Catawba River(7Q10 of 80.0 CFS).
The test using these samples resulted in a pass. Toxicity test information follows:
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentration 10%sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 21.8 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 22.8 neonates
First Sample pH 7.00 SU
First Sample Conductivity 207 micromhos/cm
First Sample Total Residual Chlorine <0.030 mg/1
Second Sample pH 7.70 SU
Second Sample Conductivity 207 micromhos/cm
Second Sample Total Residual Chlorine Not analyzed
Test results for these samples indicate that the effluent would not be predicted to have
water quality impacts on the receiving stream.

Division of Water Quality NC_
Aquatic Toxicology Unit ? Es
yrii0Orz, • •
September 25, 2002
S EP 2 7 2002
MEMORANDUM
To: Rex Gleason r
Water Quality Supervisor,MRO � : _
Through: Matt Matthews
Supervisor,Aquatic Toxicology Unit
From: Sandy Mort
Quality Assurance Officer,Aquatic Toxicology Unit
Subject: Whole effluent toxicity test results
Duke Power-River Bend 002
NPDES Permit#NC0004961/002
Gaston County
The aquatic toxicity test using grab samples of effluent discharged from Duke Power-River Bend 002
has been completed. Duke Power-River Bend 002 has an effluent discharge permitted at 5.98 million
gallons per day(MGD)entering Catawba River(7Q10 of 80.0 CFS). Whole effluent samples were
collected on September 17 and 20 by John Lesley for use in a chronic Ceriodaphnia dubia pass/fail
toxicity test. The test using these samples resulted in a pass. Toxicity test information follows.
Test Type 3-Brood Ceriodaphnia dubia pass/fail
Test Concentrations 10% sample
Test Result Pass
Control Survival 100%
Control Mean Reproduction 21.8 neonates
Test Treatment Survival 100%
Treatment Mean Reproduction 22.8 neonates
First Sample pH 7.00 SU
First Sample Conductivity 207 micromhos/cm
First Sample Total Residual Chlorine <0.0300 mg/L
Second Sample pH 7.70 SU
Second Sample Conductivity 207 micromhos/cm
Second Sample Total Residual Chlorine not analyzed
Test results for these samples indicate that the effluent would not be predicted to have water quality
impacts on receiving water. Please contact us if further effluent toxicity monitoring is desired. We
may be reached at(919)733-2136.
Basin: CTB33
cc: Central Files
Environmental Sciences Branch Water Quality Section

rvul..lac;r.Law , �,uvemor
pG William G. Ross Jr.,Secretary
North Carolina Department of Environment and Natural Resources
--L)DWa-7-
> y Alan W.Klimek,P.E.,Director
p - -Ititer Division of Water Quality
' - e'L. : / 11 141.)
September 19, 2002
Mr. Michael Ruhe
Manager, Water Protection •
Duke Energy Corporation
13339 Hagers Ferry Road (MG035A)
Huntersville, North Carolina 28078-7929
Subject: Compliance Biomonitoring Inspection
Duke Power River Bend Steam Station
NPDES Permit No. NC0004961 .
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 17,2002 by Mr. John Lesley of this Office. Operation
and maintenance of the facility are commendable. 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,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Enclosure
cc Central Files .
Gaston County Health Department
JL
NCDENR
N. C.Division of Water Quality 919 North Main Street,Mooresville NC 28115 Phone[phone]
FAX [phone]

United States Environmental Protection Agency, Washington, DC 20460 Form Approved
NPDES Compliance Inspection Report � A OMB No.2040-0003
_IQ North Carolina Department of Environment and Natural Resources Approval Expires
''44 -- Division of Water Quality,Mooresville Regional Office NCDENR 7/31/85
Section A: National Data System Coding
Transaction Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector Facility Type
N 5 NC0004961 02/09/17 B S 2
Inspection Work Days Facility Self-Monitoring Evaluation Rating BI QA Reserved
3 5 N N
Section B: Facility Data
Entry Time: Permit Effective Date:
Name and Location of Facility Inspected: 10:05 February 1,2002
Duke Power River Bend Steam Station Exit Time:
Highway 16,northeast of Mount Holly 11:05 Permit Expiration Date:
Gaston County,North Carolina Date: January 31,2005
02/09/17
Name(s)of On-Site Representatives Title(s) Phone No(s):
David Saleeby/ORC/ 704-263-3242
Name and Address of Responsible Official: Title:
Mr. Michael A. Ruhe Manager, Water Protection
Duke Energy Corporation Phone No. Contacted?
13339 Halters Ferry Road(MGO3A5) 704-875-5961 No
Huntersville,North Carolina 28078-7929
Section C:
Areas Evaluated During Inspection
® Permit ® Flow Measurement ® Operations&Maintenance
❑ Sewer Overflow
Records/Reports ® Self-Monitoring Program ❑ Sludge Handling/Disposal ❑ Pollution Prevention
® Facility Site Review ❑ Compliance Schedules ❑ Pretreatment Program
g ❑ Multimedia
® Effluent/Receiving Waters ® Laboratory ❑ Stormwater ❑ Other:
Section D: Summary of Findings/Comments
See Attached Sheet(s)for Summary
Chronic toxicity test results will be forwarded under separate cover when available.
Signature(s)of Inspector(s):� Agency/Office/Telephone: Date:
John Lesley �( DENR-DWQ/MRO/[phone] FAX: [phone] September 18,2002
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 River Bend Steam Station
NPDES Permit No.NC0004961
Page 2
John Lesley last inspected this facility on July 10, 2001.
Permit:
The facility is permitted for the following outfalls:
Outfall 001: Discharge of once through cooling water from the intake screen backwash,
chiller system water, turbine lube oil coolers, condensate coolers, main steam turbine condensers,
and intake tunnel dewatering sump.
Outfall 002: Ash pond discharge. Sources of water entering the ash pond are induced
draft fan and preheater bearing cooling water, stormwater runoff, treated groundwater, track
hopper sump discharge (groundwater), coal pile runoff, laboratory drains, chemical make up
tanks, drum rinse wastewater, ash transport water, sanitary wastewater,metal cleaning waste,
chemical metal cleaning waste, and turbine and boiler room sumps.
Outfall 002A: Yard sump overflow discharges.
Facility Site Review/Operations and Maintenance:
Outfall 001 also appeared to be well maintained. A baffle has been installed across the
canal to prevent foam(entrained air) from entering Mountain Island Lake. The ash basin (002)
also appeared to be well maintained and operated. Dams were mowed and well grassed and
baffles were in place to prevent discharge of floating scum on portions of the ash basin. Outfall
002A has not discharged in the previous 12-month period.
The ORC has a Grade II Certification and all designated back up ORCs are adequately
certified for the operation of this facility.
Laboratory:
The on-site laboratory conducts temperature and pH monitoring. The calibration log for
pH measurement was complete and up-to-date. Temperature is measured by means of a
resistance temperature detector(RTD) located at outfall 001. The RTD is calibrated annually.
Field Parameter Certification has been obtained for temperature and pH measurement
(Certification No. 5157).
Records and Reports:
Records and reports consist of ORC logs, discharge monitoring reports, laboratory
analysis reports, chain of custody forms, and calibration records. All records and reports were
readily accessible.

Duke Power River Bend Steam Station
NPDES Permit No.NC0004961
Page 3
Self-Monitoring Program:
Monthly self-monitoring reports were reviewed for the period June 2001 through May
2002. One pH limit violation was reported in July 2001. No other violations were reported
during the period.
Grab samples are collected and placed on ice immediately then shipped to the Duke
Energy Environmental Center for analysis.
Effluent/Receiving Waters:
The discharges (outfalls 001 and 002) were clear with no traces of suspended solids or
foam. The effluents are discharged to the Catawba River. No adverse impacts resulting from the
discharges were observed.
Flow Measurement:
Flow measurement is consistent with NPDES Permit requirements. Outfall 001: Flow is
calculated from pump log data. Outfall 002: Flow is measured by means of a staff gauge.
Sludge Disposal:
Ash is collected in the ash basin and disposed of in accordance with Ash Reuse Permit
No. WQ0000452.

t
t�F W A Michael F.Easley
O G Governor
William G.Ross,Jr.,Secretary
r Department of Environment and Natural Resources
p -c- Gregory J.Thorpe, Ph.D.,Acting Director
Division of Water Quality
April 30, 2002
Ms. Kathryn Tronsberg
Senior Manager, Financial Advisory Services Group
Deloitte & Touche, LLP
Valuation Group
2500 PPG Place
Pittsburgh, Pennsylvania 15222-5401
SUBJECT: Tax Certification
No. TCS-MV-105
Wastewater Treatment Facilities
Duke Power
Riverbend Steam Station
NPDES No.NC0004961
Gaston County, North Carolina
Dear Ms . Tronsberg:
Attached are two (2) copies of Tax Certification Number TCS-
MV-105 covering the operation of wastewater treatment facilities
as specified in the subject NPDES Permit issued by the North
Carolina Environmental Management commission.
The Company may use this Certification to obtain tax
benefits in keeping with the appropriate Statutes.
Sincerely,
• i t t / ' ,
D. Rex Gleason
Water Quality Regional Supervisor
Attachment
cc: Gaston County Health Department
NCDEM .
Customer Service Division of Water Quality 919 North Main Street Mooresville, NC 28115 Phone [phone]
1 800 623-7748 Fax [phone]

W ArER Michael F.Easley
Governor
c William G.Ross,Jr.,Secretary
_ Department of Environment and Natural Resources
- < Gregory J.Thorpe,Ph.D.,Acting Director
Division of Water Quality
April 30, 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-105
Wastewater Treatment/
Abatement Facilities
Duke Power
Riverbend Steam Station
NPDES No.NO0004961
Gaston County, NC
Dear Mr. Bailey:
Attached is Tax Certification No. TCS-MV-105 covering the
operation of wastewater treatment facilities as specified in the
permit application and subject NPDES Permit issued by the North
Carolina Environmental Management Commission.
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 North
Carolina Division of Water Quality.
Sincerely,
•
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
N DENE
Customer Service Division of Water Quality 919 North Main Street Mooresville, NC 28115 Phone [phone]
1 800 623-7748 Fax [phone]
i -

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
Riverbend Steam Station
Gaston County
HAS BEEN ISSUED
NPDES Permit No. NC0004961 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 disposal system
4-Ash basin process wastewater sump system
5-Sanitary waste system connected to the ash basin
6-Groundwater remediation system
7-Pumps, piping and controls pertinent to the listed facilities
The wastewater treatment facilities are located at Duke Power
Company's Riverbend Steam Station in Mount Holly, Gaston County.
Treated effluent is discharged into the Catawba River.
The Environmental Management Commission and the Department of
Environment and Natural Resources have found that the treatment
facilities:
a. Have been constructed or installed;
b. Comply with the requirements of the Commission;
c. Are being effectively operated in accordance with the
terms and conditions of the Permit, Certification of

Page Two
Duke Power
Tax Certification
Approval, or other document of approval issued by the
Commission; and
d. Have as their primary rather than incidental purpose
the reduction of water pollution resulting from the
discharge of wastewater.
Issued at Mooresville, North Carolina this the 30ulday of April,
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-105

Or eloitte&Touche LLP
Valuation Group
2500 PPG Place
Pittsburgh,Pennsylvania 15222-5401 /
i
Tel:[phone] r 1
Fax:[phone]
www.us.deloitte.com \ Deloitte
\\ &Touche
RECEIVED
APR 2 4 2002
April 24, 2002 NC DEPT OF ENVIPOMIRENT CARS-02-185
AND NATIJOU C S
MOORS ''iILLE REZRYMAL OFFICE
Mr. Rex Gleason
Water Quality Supervisor
Department of Environment 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 for
qualifying water pollution control equipment currently installed at the Riverbend 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 April 16, 2002,
was attended by Ms. Kathryn Tronsberg and Mr. Robert Morgan of D&T, Mr. David Saleeby of
Duke Power, and Mr. Samar Bou-Ghazale of the Division of Water Quality.
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 Mr. Bou-Ghazale's request, are submitting a modified application
for 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)].
In addition, included for Mr. Bou-Ghazale's use is the Plant's Water Schematic (see Attachment)
to confirm the various wastewater flows throughout the Plant.
Deloitte
Touche
Tohmatsu

April 24, 2002 CARS-02-185
Page 2
Please amend Duke Power's original request for tax exemption certification to include the
following waste disposal system descriptions for tax exemption certification purposes based
upon the verbal understandings reached between Mr. Bou-Ghazale and our office:
I. Ash Basin System:
Installed components of the Ash Basin System include the detention basin and ash basin
treatment systems consisting of the carbon dioxide injection system, acid injection system, and
sodium hydroxide system.
II. Bottom & Fly Ash Collection & Sluicing System:
Installed components of the Bottom & Fly Ash Collection & Sluicing System include the piping
and collection systems, surge/transfer tank, pressure systems, dragline, sluicing equipment, and
related piping, valving, instrumentation, and controls.
III. Ash Basin—Stormwater Run-off Disposal System:
Installed components of the Ash Basin — Stormwater Run-off Disposal System include the
piping, valving, instrumentation, and controls for the stormwater run-off from the roof drains and
paving to the ash basin via the yard drain sump, and the coal pile to the ash basin via the yard
drain sump.
IV. Ash Basin—Process Wastewater Sump System:
Installed components of the Ash Basin — Process Wastewater Sump System include concrete
sump structures, overflow equipment, pumps, and related piping, valving, instrumentation, and
controls for the disposal of wastewater from 1) the old end pit sump to the boiler room sump to
the ash basin, 2) the turbine room sump to the yard drain sump to the ash basin, and 3) the track
hopper sump to the yard drain sump to the ash basin.
V. Sanitary Waste Septic Treatment System:
Installed components of the Sanitary Waste Sept' a septic tanks,
holding tank, and related piping, valving, instrumentation, and controls.
VI. 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.

24, 2002
" rlCARS-02-185
Page 3
Please send one copy of the completed tax exemption certificate for the Plant systems above to
the following addresses:
Kelly J. Voelkel, CMI
Director, Property Tax Division
Duke Power Company
5400 Westheimer Ct.
Houston, TX 77056-5310
Kathryn Tronsberg
Senior Manager, Financial Advisory Services Group
Deloitte & Touche, LLP
2500 One PPG Place
Pittsburgh, PA 15222-5401
Should you have any further questions concerning this application for tax exemption
certification,please contact me at(412) 338-7822.
Very truly yours,
________J
Kathryn Tronsberg
Senior Manager, Financial Advisory Se .ces Group
cc: Samar Bou-Ghazale (DENR- Division of Water Quality)
Kelly Voelkel (Duke Energy - Houston)
John Mease (Duke Energy - Charlotte)
David Saleeby (Duke Power- Riverbend Steam Station)
Jeff Binkley (Deloitte& Touche - Atlanta)

IM.I.1 — NPDES Permit No. NCO
Riverbend Steam Station Page 12 of 12
Catawba Intake Screen Backwash 1
River
_Catawba Plant Chiller System ►
River Il
Catawba Outfall 001 Mnt Island Lake
Turbine Lube Oil Coolers
River 335 MOD (Catawba River)
CRiver ,J Condensate Coolers ►
River Il
Catawba,) Exhaust Steam ►
River I, Condensers
Catawba_l Intake Tunnel Unwatering ►
River '.JJ sump
Catawba ► Ash Sluice System
River
SW from Pond areas& 0.31 MOD
upgradient watersheds
3MGD
Catawba Gravity filter BW&Clarifier Evaporation&
_
River ► Filtered Water System ► sludge ► Old End Pit Sump Seepage 0.5 MGD
0 004M G D
Demin system o BoilerRm Sump 1.3 MGD
• , Mnt Island Lake
, 6MGD (Catawba River)
yr 4.,,•4:+kl ,. 1;4.11 i40 d 9, . .a F :ai:
Yard Drain Sump 1.4 MOD
Chem Makeup Tanks& ,,,..
Drum Rinsate
Liimic
r ♦ i
DW System(groundwater) ► Lab Drains ✓-- Sanitary system 0:006MOD
t
•
Office PlantlTrailer Sanitary„� :TUrbine-km- Sump Misc wastes
►
Wastewater
Catawba ► Preheater Bearing Cooling o.15 Mod,
River Water i
Catawba Induced Draft Fan CoolingRemedia ion OIL/Water
16AAco3
River ► Water "•••
Paving
January 2001

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 04/28/2011 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? ■ non
#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 2/28/2015. No chlorination is provided in the
once through condenser cooling water(Outfall 001). The supporting data/calculations
provided by Duke Energy in the most recent permit renewal application (received by the
Division on 8/31/2009) indicated that there is sufficient capacity in the ash basin to
sustain the retention volume specified in the Permit up through the year 2015.
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 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
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: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 04/28/2011 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 March
2010 through February 2011. No effluent limit violations were reported and all
monitoring frequencies were correct.
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory? Ninon
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 #5157. Duke Energy's Environmental Services laboratory (#248)
and the contracted services of ETS, Inc. (toxicity) also provide analytical support. The
pH meter and temperature measuring devices appeared to be properly calibrated (and
documented).
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? n n ■ n
Is sample collected below all treatment units? ■ n n n
Is proper volume collected? ■ n n n
Is the tubing clean? n n ■ n
#Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees Celsius)? ■ n n n
Is the facility sampling performed as required by the permit(frequency,sampling type representative)? ■ n n n
Comment: The subject permit requires effluent grab samples. No discharges were •
reported at Outfall 002A (yard sump overflow) during this DMR review period.
Upstream/Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit(frequency,sampling type, and sampling location)? ■ 0 n n
Comment:
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 0 •
Judge,and other that are applicable?
Page# 4

•
NPDES Permit NC0004961
Riverbend Steam Station
Gaston County
The following items are REQUIRED for all renewal packages:
❑ A cover letter requesting renewal of the permit and documenting any changes at the facility since
issuance of the last permit. Submit one signed original and two copies.
❑ The completed application form (copy attached), signed by the permittee or an Authorized
Representative. Submit one signed original and two copies.
❑ If an Authorized Representative (such as a consulting engineer or environmental consultant) prepares
the renewal package, written documentation must be provided showing the authority delegated to any
such Authorized Representative (see Part II.B.11.b of the existing NPDES permit).
❑ A narrative description of the sludge management plan for the facility. Describe how sludge (or other
solids) generated during wastewater treatment are handled and disposed. If your facility has no such
plan (or the permitted facility does not generate any solids), explain this in writing. Submit one signed
original and two copies.
The following items must be submitted by any Municipal or Industrial facilities discharging
process wastewater:
Industrial facilities classified as Primary Industries (see Appendices A-D to Title 40 of the Code of Federal
Regulations,Part 122) and ALL Municipal facilities with a permitted flow >_ 1.0 MGD must submit a
Priority Pollutant Analysis (PPA) in accordance with 40 CFR Part 122.21.
The above requirement does NOT apply to privately owned facilities treating 100%
domestic wastewater, or facilities which discharge non process wastewater (cooling
water, filter backwash, etc.)
PLEASE NOTE:
Due to a change in fees effective January 1, 1999, there is no renewal fee required with your
application package.
Send the completed renewal package to:
Charles H. Weaver
NC DENR / Water Quality / NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617

•
0c. W q TF9 Michael F. Easley
Q FAA Governor
0 414' NCDENR William G. Ross,Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
May 13,2004
Michaael A.Ruhe
Duke Energy Corporation
Post Office Box 1006
Charlotte,NC 28201-1006
Subject: Renewal Notice
NPDES Permit NC0004961
Riverbend Steam Station
Gaston County
Dear Permittee:
Your NPDES permit expires on February 28,2005. 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 September 1,
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 February 28,2005,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 Bob Sledge of the
Division's Compliance Enforcement Unit at(919) 733-5083,extension 547. You may also contact the Mooresville Regional
Office at(704) 663-1699 to begin the rescission process.
Use the enclosed checklist to complete your renewal package. The checklist identifies the items you must submit with
the permit renewal application. If you have any questions,please contact me at the telephone number or e-mail address listed
below.
Sincerely,
ter. // 11/:(AW(/7/
kig
Charles H.Weaver,Jr. '� � { 1
NPDES Unit NOORES1A .::
•
cc: Central Files MAY 2 C ?nol
'esville'Regional Office,-W ter Quality Sectieifla
NPDES File
1617 Mail Service Center,Raleigh,North Carolina 27699-1617 919 733-5083,extension 511 (fax)919 733-0719
VisiT us ON THE INrrERNEr @ http://h2o.enr.state.nc.us/NPDES e-mail:[e-mail]

Permit: NC0004961 Owner-Facility: Riverbend Steam Station
Inspection Date: 04/28/2011 Inspection Type: Compliance Evaluation
Operations & Maintenance Yes No NA NE
Comment: The facility appeared to be properly operated and well maintained. Dike
inspections are performed (and documented) on a monthly basis. The boilers had not
been chemically cleaned during this DMR review period.
Flow Measurement-Effluent Yes No NA NE
#Is flow meter used for reporting? n n E 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: Oufall 001 flows are measured by pump curves (calculations involving #of
pumps, pump rates, pump run times, etc.) and Outfall 002 flows are measured by a staff
guage and weir(with supporting calculations).
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
Comment: Outfall 002 effluent appeared clear with no sheens or foam.
•
Page# 5

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
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 - F1CG500110
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
•

Duke Duke Energy Corporation
Pi%Energy. RC DEFT.0-r r-f,R011MENT Energy Center
P.O.Box 1006
�,• a. =y.- :],irk r�9C„_ Charlotte,NC 28201-1006
February 11, 2002 00r•"' "' -
Ms. Coleen Sullins FEB 1 5 2002
North Carolina Department of Environmental,
Health and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617 2:V�c'��, �,ryp.�gi �"°w ��'3.,E1
fiwA L i ?L6t 1 bam.e !
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,
/heodore . Brig
Vice President
Fossil/Hydro Operations
Attachment
cc: Bradley Bennett, NCDENR, Raleigh, NC
David Goodrich, NCDENR, Raleigh, NC
Forest Westall, NCDENR, Asheville, NC
Rex Gleason, NCDENR, Mooresville, NC
Steve Mauney, NCDENR, Winston-Salem, NC

PH ADJUSTMENT AT RIVERBEND STEAM STATION
Subject: PH ADJUSTMENT AT RIVERBEND STEAM STATION
Date: Tue, 2 Jul 2002 09:33:05 -0400
From: "Robert R Wylie" <[e-mail]>
To: [e-mail]
CC: [e-mail], "David A Saleeby" <[e-mail]>
Mike,
As a follow-up to our telephone conversation this morning, Riverbend Steam
Station has recently experienced an increase in pH levels in its ash basin
due to an algae bloom. The wastewater is being treated by a CO2 system
that is currently in place. As described in the January 2001 NPDES
application, Riverbend plans to begin using sulfuric acid to further treat
the wastewater prior to the discharge. Bench tests are currently being
conducted to determine the amount of sulfuric acid that is needed to ensure
that the pH is maintained at a level of 6 to 9 Standard Units.
As we discussed, in the future since this treatment was identified in the
NPDES application, Riverbend will proceed treatment without notification to
your office. In addition, Riverbend plans on developing a long term
strategy for managing algae blooms in its ash basin.
If you have questions please call me.
Sincerely,
Robert Wylie
(704 ) 382-4669
1 of 1 7/8/02 9:25 AM