NC0086665_Permit Issuance_20071018

Michael F. Easley, Govemor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
October 18, 2007
Albert J Smith, III, Vice President, CC/CT Operations
Duke Energy Carolinas, LLC
526 South Church Street
Charlotte, North Carolina 28202
Subject: Issuance of NPDES Permit NC0086665
Rockingham County Combustion Turbine Facility
240 Earnest Drive, Reidsville, NC
Rockingham County
Dear Mr. Smith:
The Division of Water Quality (the Division) hereby transmits the approved final NPDES permit for the
subject site. We issue this permit 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 May 9, 1994, or as subsequently amended.
The Division acknowledges your purchase of the subject site (documents received December 21,
2006), and your authorization of Tracy B. Robinson, site Production Manager, to provide information
and sign reports, as required under this permit.
Concerning Total Residual Chlorine (TRC). In compliance with the statewide standard for chlorine,
the Division must deny your request to remove the TRC limit (17 ug/L) and Monthly monitoring from
the permit. However, footnotes have been added to the effluent -monitoring table to explain that
monitoring and limits apply only if chlorine is used by the' facility [See permit Section A. (1.)].
Receiving -Stream Flow Conditions. Please be reminded that subject site discharges under "zero -flow"
stream conditions (dry ditch), i.e., your discharge constitutes effectively 100% of local surface waters.
This means that your effluent enters the surface environment with little or no benefit from dilution.
Changes to your Previous Permit — Oil & Grease, Lead, and Naphthalene. As part of renewal, the
Division conducted a Reasonable Potential Analyses (RPA) on your analytical data for lead, as required
by the NPDES Program. Based on this analysis, the Division finds no reasonable potential to exceed the
instream water -quality Standard for lead. Therefore, monitoring for Total Lead has been removed from
your permit. Similarly, and for the same reason, Oil & Grease monitoring has been discontinued.
However, to better evaluate the potential loss to the environment of #2 diesel (your preferred back-up
fuel source at this facility), the Division has added the parameter Naphthalene [See permit Section A.
(1.)]. There are no other changes to your previous permit.
41711
NCDENR
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone] Customer Service
1 800 623-7748

Duke Energy Carolinas, LLC
Rockingham County Combustion Turbine Facility
Issuance of NPDES Permit NC0086665
Page 2
If any parts, measurement frequencies, or sampling requirements contained in this permit are
unacceptable, you have the right to an adjudicatory hearing upon written request within thirty (30) days
after receiving this letter. Your request must be in the form of a written petition conforming to Chapter
150B of the North Carolina General Statutes, and must be filed with the office of Administrative
Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such a demand is
made, this permit shall be final and binding.
This permit is not transferable except after notifying the Division of Water Quality. The Division may
require modification, or revocation and re -issuance of this permit. Please notice that this permit does not
affect your legal obligation to obtain other permits required by the Division of Water Quality, the
Division of Land Resources, the Coastal Area Management Act, or other federal or local governments.
If you have questions, or if we can be of further service, please contact Joe Corporon at
[Joe.Corporon(a�ncmail.net] or call [phone], extension 597.
Respectfully,
4 - Coleen H. Sullins
Enclosure: NPDES Permit Final NC0086665
cc: Central Files
Winston-Salem Regional Office, Water Quality Section
NPDES Proeram
Aquatic Toxicology Unit
EPA Region 4

Permit No. NC0086665
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended,
Duke Energy Carolinas, LLC
is hereby authorized to discharge wastewater from a facility located at
Rockingham County Combustion Turbine Facility
240 Ernest Drive
Reidsville, North Carolina
Rockingham County
to receiving waters designated as an unnamed tributary to Jacobs Creek in the Roanoke River Basin in
accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II,
III, and IV hereof.
The permit shall become effective December 1, 2007
This permit and the authorization to discharge shall expire at midnight on April 30, 2012
Signed this day October 18, 2007
kvc` % Coleen H. Sullins, Direct
Division of Water Quality
By Authority of the Environmental Management Commission

SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked, and as of this issuance, any previously issued permit bearing this number is no longer effective.
Therefore, the exclusive authority to operate and discharge from this facility arises under the permit
conditions, requirements, terms, and provisions described herein.
Duke Energy Carolinas, LLC
is hereby authorized to:
1. continue discharging storm water from the existing Water Pollution Control System consisting of a
oil -water separator and a polishing filter located at Rockingham County Combustion Turbine facility,
240 Earnest Drive, Reidsville, Rockingham County, and
2. discharge from said Water Pollution Control System through Outfall 001 at a specified location (see
attached map) into an unnamed tributary to Jacobs Creek, a Class C waterbody within the
Roanoke River Basin.

Outfall 001
Lat 36° 19' 42" N
Long 79 ° 49' 45" W
(discharge flows west, then north)
Duke Energy Carolinas, LL•
Rockingham County Combustion Turbine Faeiity
State Grid/Ouad: B 19 SE / Bethany, NC Permitted Flow: not limited
Sub -Basin: 03-02-02 Stream Class: C
River Basin: Roanoke Receiving Stream: UT to Little Jacobs Creek
Approximate Property
Boundary
Facility
Location
not to scale
4141,
NPDES Permit NC0086665
Rockingham County

Permit NC0086665
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified
below:
PARAMETER
,,, ;
..
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flows
Episodic
1
Effluent
Total Suspended Solids
45.0 mg/L
Monthly
Grab
Effluent
- Total Residual Chlorine-2 - -
17 µg /L 2
Monthly
Grab
Effluent
Turbidity
Monthly
Grab
Effluent
Temperature 3
Monthly
Grab
Effluent
-Naphthalene ._ \_
r.., %:
Monthly
Grab
Effluent
BTEX 4
Semi-annually
Grab
Effluent
Acute Toxicity 5
Annually
Grab
Effluent
Footnotes:
Flow — During periods of no flow, the Permittee shall submit a monthly Discharge Monitoring Report
(DMR) indicating "No discharge." Flow shall be monitored with each discharge event and may be
monitored in one of four ways:
• measure flow continuously;
• calculate flow based on total rainfall per area draining to the outfall; exclude built -upon area
(best methofi forfaeilities with large runoff -collection ponds); - _ -
• estimate flow at 20-minute intervals during the entire discharge event; or
• report flow based on discharge pump logs.
2. Total Residual Chlorine (TRC) — limit and monitoring apply only if chlorine is used by the facility.
3. Temperature — Effluent temperature shall not cause the receiving -stream temperature to
increase more than 2.8 degrees C, nor may it, in any case, cause the receiving -stream
temperature to exceed 32 C. A \ L
4. Benzene, Toluene, Ethylbenzene, and Xylene. key (2_, ) p-Q I`( f (-'-1
5. Acute Toxicity (Fathead Minnow, 24-hour), Annual [see A. (2.)]. - (= NLL
1.
Units: mg/L = milligrams per liter
µt-
= micrograms per liter
it-e l/1t6 J e.
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
The Permittee shall discharge no tank solids, tank bottom water, or the tank rag layer.
Following hydrostatic testing, the Permittee shall discharge no tank (or pipe) contents unless discharge
analyses show benzene concentration below 1.19 µg/L and toluene concentration below 11 µg/L.
� ,1/4Ssu t.(c (-e �, �l d f4

Permit NC0086665
A. (2.) ACUTE TOXICITY MONITORING (ANNUAL)
The Permittee shall conduct annual toxicity tests using protocols defined as definitive in EPA Document
EPA/600/4-90/027 entitled "Methods for Measuring the Acute Toxicity of Effluents to Freshwater and
Marine Organisms." The monitoring shall be performed as a Fathead Minnow (Pimephales promelas)
24-hour static test. Effluent samples for self -monitoring purposes must be obtained below all waste
treatment. The Permittee will conduct one test annually, with the annual period beginning in January of
the calendar year of the effective date of the permit. The annual test requirement must be performed and
reported by June 30. If no discharge occurs by June 30, notification will be made to the Division by this
date. Toxicity testing will be performed on the next discharge event for the annual test requirement.
The parameter code for this test is TAE6C. All toxicity testing results, required as part of this permit
condition, will be entered on the Effluent Discharge Form (MR-1) for the month in which it was
performed, using the appropriate parameter code. Additionally, DWQ Form AT-1 (original) is to be sent
to the following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later
than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine
of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of
the waste stream.
Should any test data from either these monitoring requirements or tests performed by the North Carolina
Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened
and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid test
and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

NCDENR / DWQ
FACT SHEET
FOR NPDES PERMIT DEVELOPMENT
Duke Energy Carolinas, LLC
Rockingham County Combustion Turbine Facility
Permit NC0086665
able 1 — General Information
Facility Information
1. Facility Name:
Rockingham County
Combustion Turbine Facility
6. Pretreatment
Program: None
No
2. Permitted Flow:
No limit
7. County:
Rockingham
3. Facility Class:
Class I
8. Regional Office:
Winston-Salem
4. Facility Status:
Existing
9. USGS Topo Quad:
B 19SE
5. Permit Status:
Renewal
10. USGS Site:
Bethany, NC
Receiving Stream Characteristics
1. Receiving Stream:
UT of Little Jacobs Creek
2. Subbasin:
030202
Roanoke RB
8. Drainage Area (mi2):
NA
3. Index No.:
9. Summer 7Q10 (cfs)
0.0
4. Stream Class:
C
10. Winter 7Q10 (cfs):
0.0
5. 303(d) Listed:
No
11. 30Q2 (cfs):
0.0
6. 305(b) Status:
NA
12. Average Flow (cfs):
0.0
7. Use Support:
13. IWC (%):
100
Table 2 - Conditions Incorporated into This Renewal
Proposed Condition
Parameter(s)
Justification
Added footnote to Section A.(1.)
discussing compliance "only if'
chlorine is used....
Total Residual Chlorine
(TRC)
Compliance with new standard;
facility does not normally use
chlorine to disinfect.
Deleted permit monitoring and limit
Total Lead, Oil & Grease
No reasonable potential (RP).
Add monthly effluent monitoring
Naphthalene
BPJ — additional indicator for
loss of #2 diesel (back-up fuel
source)
Changed permit date to 30Apr2012.
Expiration Date
Per basin renewal schedule.
Corrected description of Outfall 1
from UT of Jacobs Creek to UT of
Little Jacobs Creek
Receiving -stream location
Based on map review

FACT SHEET - NPDES RENEWAL
Duke Energy Carolinas, LLC
Permit NC0086665
Page 2
RENEWAL NOTES
Summary
• Rockingham County Combustion Turbine Facility is a minor industrial facility generating 900 MW
of electricity to support peak power demands. The facility generates electricity using 5 combustion
gas turbines fueled by natural gas (primary fuel) and #2 fuel oil as a backup (secondary fuel). Natural
gas is delivered to the site via pipeline, while fuel oil is stored in two large surface tanks (2.25 MG
with secondary containment).
• This permit regulates a Water Pollution Prevention System discharge of process -contact water
(evaporative cooling water) and process -contact stormwater (from behind secondary containment for
bulk -storage fuel tanks and appurtenant piping). This facility employs a staff of 12 and sanitary
sewer is treated onsite by a conventional subsurface septic system.
• This facility discharges intermittently to an unnamed tributary to Little Jacobs Creek (corrected
location), thereby flowing to Jacobs Creek, hence to the Dan River (Class C).
• Intermittent cooling water flow ranges from 0-7,200 gpd, while the intermittent process flow ranges
from 0-18,000 gpd.
• Jacobs Creek is not listed as "impaired" on the Divisions list of impaired waterbodies [303(d) List,
2006] .
Permit Development
• Receiving Stream. Historical•data indicates this discharge occurs under zero -flow Conditions.
• Historical NPDES Permitting. This permit was originally issued in November 1999 and reissued in
January 2001. The Division received a renewal application from the Previous owner (Dynegy Inc.)
on September 8, 2006 and Duke Energy (upon purchase of the property) did not alter the application.
• Effluent Guidelines. EPA Effluent Guidelines (40 CFR 423) apply only to steam turbine facilities,
therefore these guidelines do not apply to this facility (peak demand via combustion gas turbines).
• The previous permit regulated parameters typical to cooling water discharges (e.g., turbidity and
temperature) and parameters associated with bulk oil storage terminals (Acute toxicity, TSS, Oil &
Grease, EPA Method 624/625). This renewal maintains the same limits and monitoring, with the
exception of minor changes see (Table 2).
Permit Compliance
• Effluent Toxicity. Facility passed 5 of 5 annual acute toxicity tests (24-hour, fathead minnow) from
2003 to 2007.
• Effluent Parameter Monitoring. O&G max predicted = 19.9 mg/L No RP assuming allowable at 30
mg/L (BPJ). Lead not detected in —30 samples (Jan04 to Ju107). Flow reported — monthly; range
0.004 to 0.092 MGD (Jan04 to Ju107).
• Monitoring for BTEX. BINS recorded four frequency violations (not tested) for BTEX (benzene,
toluene, Ethylbenzene, and Xylene) — required semi-annual testing not reported in Dec 2005, Jun
2006, Dec 2006, Jun 2007. However, with the change in ownership from Dynegy to Duke Power
(December 2006), BTEX was sampled and reported in January 2007. DMR results show "not
detected." Therefore, DWQ will take no assessment action [previous owner's violations (BPJ)].
Page 2 of 3
Version: August 21, 2007

FACT SHEET - NPDES RENEWAL
Duke Energy Carolinas, LLC
Permit NC0086665
Page 3
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: August 29, 2007
Permit Scheduled to Issue:
NPDES DIVISION CONTACT
If you have questions r
Joe Corporon at
73 . -50: xt. 597
NAME: _4•11: 1e
4,GIONAL OFF ' E REVIEW
October 22, 2007
ove information or on the attached permit, please contact
DATE: .•lt-i
NAME: DATE:
SUPERVISOR: DATE:
NPDES SUPERVISOR: DATE:
Page 3 of 3
Version: August 21, 2007

FILE CONTENTS:
Lef�e:
�IMS Tracking Slip
E This Check List
Right side:
❑ Streamline Package Sheet
EDraft Permit Cover Letter.
Er:Draft Permit
IT Facility Map
lir-- Fact Sheet.
ermit Writer's Notes
ff Report from Region
Old Permit
„...Permit Application.
E Acknowledgement Letter
❑ Permittee Responses
❑ Waste Load Allocation
Note:
NPDES PERMIT
DRAFT & FINAL
CHECK LIST
Facility MS?-6L1KASJ LL C
Permit No.
NPDES Permit Writer:
(to region, only if s
(add new polic
(order: cove
(E-Map:
(Docu
(if no
to permit)
ts, special conditions)
facility Outfalls; U ands " sample locations)
permit writer's re-issuanc>' ogic; RPA data attached (?)
acts Sheet - chronology, strategy, DMR Review, RPA, etc.)
clu
sup
xt;
ed)
mmarize major ch
ment, map, effluent s
(as appropriate - not needed if expedited)
(Text, Effluent Sheets and Special Conditions)
(New Permit or Renewal; any additional permittee correspondence)
(NPDES Unit written response to Renewal Application)
(to acknowledgement letter, if any)
(reference date; notes if recalculated for current action)
Italics indicate special conditions not always required or applicable.
i Submitted to F—v"• for Peer Review: Date
/Peer Review completed by
I3 Updated Public Notice System [date] 69`(41/45G4
4 Admin cutoff date
Date p2 6 'i'
. Updated BIMS Events: [date] C2(A-34 I
❑ Submitted for Public Notice on Newspaper Notice Received . Ac al Notice date(s) dZ5F�
CIk)--5nab
• Draft Permit [Mailed E Mail to (Regional Staff) ,A P-Alsse C by e Date 2/4w 0 t
❑ Regional Office R :ievv /ApProvai sympleted by
❑ Additional Review by [TOX/DEH] initiated by Date
❑ Additional Review/Approval completed by Date
❑ EPA Review Draft sent to initiated by Date
Mu( 0 PJ4F=S
. Received on [Date]
2z-04L5G0�
❑ EPA Review /Approval [mail / E-mail] completed by Date Received
FINAL to Mike / Susan / Tom Gil f signature on f c \ ( Letter Dated r8'c
7-p?-
❑ Additional Review [other]
IY Final Files transferred to Server (Permits Folder) / J . BIMS Final l 1pdates: EventsLimas
Version 8/14/2007

jJe 3LetbMdtte 3&ebtetu
1921 VANCE STREET P.O. BOX 2157 REIDSVILLE, NC 27320 336-349-4331
PUBLIC NOTICE
STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT
COMMISSION/NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE A
NPDES WASTEWATER PERMIT
On the basis of thorough staff review and
application of NC General Statute 143.21,
Public law 92-500 and other lawful standards
and regulations, the North Carolina
Environmental Management Commission
proposes to issue a National Pollutant
Discharge Elimination System (NPDES)
wastewater discharge permit to the
person(s) listed below effective 45 days
from the publish date of this notice.
Written comments regarding the proposed
permit will be accepted until 30 days after
the publish date of this notice. All comments
received prior to that date are considered in
the final determinations regarding the
proposed permit. The Director of the NC
Division of Water Quality may decide to hold
a public meeting for the proposed permit
should the Division receive a significant
degree of public interest.
Copies of the draft permit and other support-
ing information on file used to determine
conditions present in the draft permit are
available upon request and payment of the
costs of reproduction. Mail comments and/or
requests for information to the NC Division of
Water Quality at the above address or call
Dina Sprinkle [phone], ext. 363 at the
Point Source Branch. Please include the
NPDES permit number (attached) in any
communication. Interested persons may also
visit the Division of Water Quality at 512 N.
Salisbury Street, Raleigh, NC 27604-1148
between the hours of 8:00am and 5:oopm to
review information of file.
Duke Energy Carolinas, LLC has applied for re-
newal of its NPDES permit NC0086665 for the
Rockingham County Combustion Turbine Fa-
cility located at 240 Ernest Drive, Reidsville,
NC in Rockingham County. This facility dis-
charges to an unnamed tributary of Little Ja-
cobs Creek located within the Roanoke River
Basin. The parameter Total Residual Chlorine
(TRC) is water -quality limited. This discharge
may affect future wasteload allocations to
the receiving stream.
September 2.2007
_�
AFFIDAVIT OF PUBLICATION
NORTH CAROLINA
ROCKINGHAM COUNTY
Before the undersigned, a Notary Public of Said
County and State, duly commissioned, qualified, and
authorized by law to administer oaths, personally appeared
Dreama Armstrong, who being first duly sworn, deposes
and says. That she is an official of Media General of
Reidsville, Inc. engaged in the publication of a newspaper
known as The Reidsville Review, published, issued and
entered as second class -mail in the City of Reidsville, in
said County and State; that she is authorized to make this
affidavit and sworn statement, that the notice or other legal
advertisement, a true copy of which is attached hereto, was
published in The Reidsville Review on the following dates:
5 p1- iA.b-Qr a , 0001
and that the said newspaper in which such notice, paper
document, or legal advertisement was published was, at the
time of each and every such publication, a newspaper meet-
ing all of the requirements and qualifications of Section I-
597 of the General Statutes of North Carolina and was
qualified newspaper within the meaning of Section I-597 of
the General Statutes of North Carolina.
Sworn to a d subscribes} before me, this-J�'
day of -Pi?t De( , 020D 7
Oc _vv Oa�A R Ql OJ.alz Notary Public
U
°lett, t/
\V a My commission expires theg3 day of

1111 Duke
ref Energy,
November 9, 2006
NCDENR - Division of Water Quality
Surface Water Protection Section
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Rockingham Power, LLC Facility Purchase
Change of Ownership
NPDES Permit No. NC0086665
Dear Sir/Madam:
Duke Energy Corporation
526 South Church St.
Charlotte, NC 28202
Mailing Address:
PO Box 1006
Charlotte, NC 28201-1006
NOV 1 4 2006
ITY
POINT• SOURCE BRANCH
Duke Energy is herein submitting a change in ownership notice for the above -
referenced NPDES Permit. This permit covers discharges from the Rockingham
County Combustion Turbine Facility (formerly Rockingham Power LLC) located in
Reidsville, NC. The facility is now owned and operated by Duke Energy Carolinas,
LLC. We have enclosed a complete and signed Permit Name/Ownership Change
Form and a copy of the signed Purchase Agreement.
Duke Energy is also aware that the Rockingham facility's NPDES permit is under
renewal and a complete application was submitted by Rockingham Power LLC on
September 6, 2006. We request that DENR continue the permit renewal process
based on that application submittal.
Thank you for your assistance in this ownership change and permit transfer. If you
have any questions or require any additional information, please feel free to contact
me at [phone].
Sincerely,
-P63k:r1A5 kc_ut
Patrick J. McCabe, PE
Manager — Environmental Field Support
Duke Energy — Carolinas Generation
Attachments
www.duke-energy.com

Duke
e,Energyti.
November 9, 2006
NCDENR - Division of Water Quality
Surface Water Protection Section
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Rockingham Power, LLC Facility Purchase
Change of Ownership
NPDES Permit No. NC0086665
Dear Sir/Madam:
Duke Energy Corporation
526 South Church St.
Charlotte, NC 28202
Mailing Address:
PO Box 1006
Charlotte, NC 28201-1006
Duke Energy is herein submitting a change in ownership notice for the above -
referenced NPDES Permit. This permit covers discharges from the Rockingham
County Combustion Turbine Facility (formerly Rockingham Power LLC) located in
Reidsville, NC. The facility is now owned and operated by Duke Energy Carolinas,
LLC. We have enclosed a complete and signed Permit Name/Ownership Change
Form and a copy of the signed Purchase Agreement.
Duke Energy is also aware that the Rockingham facility's NPDES permit is under
renewal and a complete application was submitted by Rockingham Power LLC on
September 6, 2006. We request that DENR continue the permit renewal process
based on that application submittal.
Thank you for your assistance in this ownership change and permit transfer. If you
have any questions or require any additional information, please feel free to contact
me at [phone].
Sincerely,
Patrick J. McCabe, PE
Manager — Environmental Field Support
Duke Energy — Carolinas Generation
Attachments
www. d uke•energy. corn

Michael F. Easley, Governor
William G. Ross Jr„ Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
SURFACE WATER PROTECTION SECTION
PERMIT NAME/OWNERSHIP CHANGE FORM
I. Please enter the permit number for which the change is requested.
NPDES Permit
0
0
8
6
6
6
5
I1. Permit status prior to status change.
a. Permit issued to (company name):
b. Person legally responsible for permit:
c. Facility name (discharge):
d. Facility address:
e. Facility contact person:
(or)
Dynegy, Inc
Certificate of Coverage
Tracy B. Robinson
First / MI / Last
Plant Manager
Title
240 Ernest Drive
Permit Holder Mailing Address
Reidsville NC 27320
City State Zip
( 336) 951-1772 (336 )951-0308
Phone Fax
Rockingham Power LLC
240 Ernest Drive
Reidsville
Address
NC
27320
City State Zip
Tracy B. Robinson ( 336 ) 951-1772
First / MI / Last Phone
III. Please provide the following for the requested change (revised permit).
a. Request for change is a result of: lX] Change in ownership of the facility
Cl Name change of the facility or owner
If other please explain:
b. Permit issued to (company name):
c. Person legally responsible for permit:
d. Facility name (discharge):
e. Facility address:
f. Facility contact person:
Revised 7/2005
Duke Enerov Carolinas. LLC
Albert J. Smith, III
First / MI / Last
Vice President - Regulated CC/CT Operations
Title
526 South Church Street, Mail Code EC11P
Charlotte
Permit Holder Mailing Address
NC 28202
City State Zip
( 704 ) 382-5371 [e-mail]
Phone E-mail Address
Rockinghan County Combustion Turbine Facility
240 Ernest Drive
Reidsville
Address
NC
27320
City State Zip
Alien Stowe
First / MI / Last
( 704 ) 382-4309 [e-mail]
Phone E-mail Address

PERMIT NAIVLE/OWNERSHIP CHANGE FORM
Page 2 of 2
IV. Permit contact information: (if different from the person legally responsible for the permit)
Permit contact: Allen Stowe
First / i4II / Last
Scientist
Title
526 South Church Street, Mall Code EC13K
Charlotte
Mailing Address
NC
28202
City State Zip
( 704) 382-4309 jastow @duke-energy_com
Phone E-mail Address
V. Will the permitted facility continue to conduct the same industrial activities conducted prior to
this ownership or name change?
n Yes
❑ No (please explain)
`'I. Required Items: THIS APPLICATION i#ZLL BE RETURNED UNPROCESSED IF ITEMS ARE
INCOMPLETE OR MI.SSJNG:
❑ This completed application is required for both naive change andior ownership change requests.
❑ Legal documentation of the transfer of ownership (such as relevant pages of a contract deed; or a bill
of sale) is required, for an ownership change request. Articles of incorporation are not sufficient for
an ownership change.
The certifications below must be completed and signed by both the permit holder prior to the change, and the new
applicant in the case of an ownership change request. For a name change request, the signed Applicant's Certification
is sufficient.
PERs1ITTEE CERTIFICATION (Permit holder prior to ownership change):
I. Tracy B. Robinson , 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 is not included, this
applicatiory package tijjill be ras incomplete.
Signanue
7 fl8/o6,
APPLICANT CERTIFICATION:
I, Albert J. Smith, 111 . attest that this application for a namefownership
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 is not included, this
application pa -age ill b-`4' wined as incomplete.
7/0�
Signature Date
PLEASE SEND THE COMPLETE APPLICATION PACKAGE TO:
Division of Water Quality
Surface Water Protection Section
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Revised 7(2005

Dynegy Operating Company
Rockingham Power, L.L.0
240 Ernest Drive
Reidsville, NC 27320
336/951-1772 Fax: [phone]
www.dynegy.com
September 6, 2006
NCDENR
Division of Water Quality - NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Application for Permit Renewal
Rockingham Power, LLC
Reidsville, Rockingham County
NPDES Permit No. NC0086665
Dear Sir/Madam:
•
•
.►_-
DYNEGY
In response to your August 28, 2006 renewal reminder letter and in accordance with the
provisions of 15A NCAC 2H .0106(b) and your administrative procedures, Rockingham
Power, LLC respectfully re -submits this permit renewal application and enclosures.
Rockingham's original application was previous submitted on July 5, 2006 and returned
by your NPDES Unit on July 11, 2006. With receipt of your August 28, 2006 letter,
Rockingham is now resubmitting the application. The application consists of one
original and two copies of the Application Short Form C and supporting information
including site location map, site layout drawings, and water/ wastewater flow diagram,
and recent monitored data. The effluent data provided in Item 15 of the Short Form C
are based on the April 2005 through May 2006 reports. We understand that there is no
application fee for the filing of this renewal application.
With this application, Rockingham Power, LLC also requests the following changes to
the permit:
1) Removal of TRC sampling and limit. Rockingham Power, LLC does not use
or add chlorine at the plant. Any residual chlorine would originate from the
water supply. Since August 19, 2002 no excursions of the TRC limit have
occurred at the discharge location (Outfall 001). Based on the distance from
the discharge location to the receiving stream (approximately 1,500 feet), the
discharge would have no impact. The discharge flows overland through a dry
drainage way into a small detention pond which upon overflow runs into the
un-named tributary to Jacob's Creek (the receiving stream).

Page 2
Rockingham NPDES Renewal Application
Additionally, on June 8, 2006, three samples were collected at the detention
pond and three were collected at the un-named tributary. Tests results on
these samples did not detect TRC (lab reports enclosed).
The removal of this limit has been discussed with Mr. David Russell of your
office. He has visited the site and agreed that TRC should not be considered
an issue or limit, and should not continue to be monitored at the Rockingham
Power, LLC site.
2) Removal of the limit and monthly monitoring requirement for lead. For the
last three years, Rockingham Power, LLC has collected data showing levels
much less than the chronic in stream water quality standard of 25 pg/l. The
necessity of this effluent limit in the permit was noted for possible removal in
the prior permit renewal dated May 10, 2004.
3) Removal of the semi-annual monitoring for BTEX. Toluene has been well
below the state water quality standard of 11 pg/I during the past sampling
periods (0.0054 mg/L on 1/18/2005 and below quantification limits for
previous more recently). The necessity of this effluent limit in the permit was
noted for possible removal in the prior permit renewal dated May 10, 2004
If you should have any questions or require further information, please do not hesitate
to contact me at 336-951-1772 or Ms. Barbara Irwin at 217-872-2363 of our
environmental group.
Tracy B. Robinson
Plant Manager
ATTACHMENTS
cc: Barbara Irwin — Dynegy, Decatur
Pat McCabe - Duke Energy

Dynegy Operating Company
Rockingham Power, L.L.0
240 Ernest Drive
Reidsville, NC 27320
336/951-1772 Fax: [phone]
www.dynegy.com
July 5, 2006
NCDENR
Division of Water Quality - NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Application for Permit Renewal
Rockingham Power, LLC
Reidsville, Rockingham County
NPDES Permit No. NC0086665
Dear Sir/Madam:
1
DYNEGY
J0L 7 2006
CE1 R V mf.E QUAR�I H
In accordance with the provisions of 15A NCAC 2H .0106(b) and your administrative
procedures, Rockingham Power, LLC respectfully submits this permit renewal
application and enclosures. The application consists of one original and two copies of
the Application Short Form C and supporting information including site location map,
site layout drawings, and water/ wastewater flow diagram, and recent monitored data.
The effluent data provided in Item 15 of the Short Form C are based on the April 2005
through May 2006 reports. We understand that there is no application fee for the filing
of this renewal application.
With this application, Rockingham Power, LLC also requests the following changes to
the permit:
1) Removal of TRC sampling and limit. Rockingham Power, LLC does not use
or add chlorine at the plant. Any residual chlorine would originate from the
water supply. Since August 19, 2002 no excursions of the TRC limit have
occurred at the discharge location (Outfall 001). Based on the distance from
the discharge location to the receiving stream (approximately 1,500 feet), the
discharge would have no impact. The discharge flows overland through a dry
drainage way into a small detention pond which upon overflow runs into the
un-named tributary to Jacob's Creek (the receiving stream).
Additionally, on June 8, 2006, three samples were collected at the detention
pond and three were collected at the un-named tributary. Tests results on
these samples did not detect TRC (lab reports enclosed).

Page 2
Rockingham NPDES Renewal Application
The removal of this limit has been discussed with Mr. David Russell of your
office. He has visited the site and agreed that TRC should not be considered
an issue or limit, and should not continue to be monitored at the Rockingham
Power, LLC site.
2) Removal of the limit and monthly monitoring requirement for lead. For the
last three years, Rockingham Power, LLC has collected data showing levels
much less than the chronic instream water quality standard of 25 pg/I. The
necessity of this effluent limit in the permit was noted for possible removal in
the prior permit renewal dated May 10, 2004.
3) Removal of the semi-annual monitoring for BTEX. Toluene has been well
below the state water quality standard of 11 pg/I during the past sampling
periods (0.0054 mg/L on 1/18/2005 and below quantification limits for
previous more recently). The necessity of this effluent limit in the permit was
noted for possible removal in the prior permit renewal dated May 10, 2004
If you should have any questions or require further information, please do not hesitate
to contact me at 336-951-1772 or Ms. Barbara Irwin at 217-872-2363 of our
environmental group.
Tracy B. Robinson
Plant Manager
ATTACHMENTS
cc: Barbara Irwin — Dynegy, Decatur
Pat McCabe - Duke

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
Mail the complete application to:
N. C. Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number rNC0086665
If you are completing this form in computer use the TAB key or the up - down arrows to move from one
field to the next. To check the boxes, click your mouse on top of the box. Otherwise, please print or type.
1. Contact Information:
Owner Name
Facility Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
e-mail Address
Dynegy, Inc.
Rockingham Power, LLC
240 Ernest Drive
Reidsville
NC 27320
[phone]
[phone]
[e-mail]
2. Location of facility producing discharge:
Check here if same as above
Street Address or State Road
City
State / Zip Code
County
240 Ernest Drive
Reidsville
NC 27320
Rockingham
3. Operator Information:
Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the
Operator in Responsible Charge or ORC)
Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
Rockingham Power, LLC
240 Ernest Drive
Reidsville
NC 27320
[phone]
[phone]
Page 1 of 5 C-MI 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
4. Ownership Status:
Federal ❑ State ❑ Private ® Public ❑
5. Standard Industrial Classification (SIC) code(s): 4911
6. Number of employees: 8
7. Describe the treatment system List all installed waste treatment components with capacities,
describe the processes that generate wastewaters. If the space provided is not sufficient attach a
separate sheet of paper with the system description.
Oil -water separator and coalescing filter with a capacity of 11,600 gallons receives
contact stormwater (from around oil storage sources), service water system blowdowns,
area washdown, and air conditioner condensate discharges associated with Combustion
Turbine Units 1 through 5, and turbine inlet cooling water system blowdowns from Units
1 through 4.
The oil -water separator discharges are primarily influenced by precipitation and plant
operations. Design average and design maximum instantaneous discharge flowrates from
the separator (and Outfall 001) will be 100 gpm and 200 gpm, respectively. Discharge
durations will range from 10 to 30 minutes.
The collected oil and solids at the separator are pumped out by a contractor (e.g., Noble
Oil) and taken offsite for recycling or disposal. The need for cleaning is fairly infrequent
with the most recent occurring in June 2003.
8. Is facility covered under federal effluent limitation guidelines? No ® Yes ❑
If yes, specify the category?
9. Principal product(s) produced: Electricity
Principal raw material(s) consumed: Natural gas, #2 fuel oil
Briefly describe the manufacturing process(es):
Combustion gas turbine electric generation of 900 megawatts and associated activities including fuel
oil storage
10. Amount of principal product produced or raw material consumed
Page 2 of 5 C-MI 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
List specific amounts consumed and/or units of production over the last three years
Product Produced or Raw Material
Consumed
(AVERAGE)
Product Produced or Raw Material
Consumed
(PEAK)
per Day
per Month
per Year
Limited to 3000 hrs/year operation at
each combustion turbine unit with
1000 hrs/year each unit on fuel oil
11. Frequency of discharge: Continuous ® Intermittent ❑
If intermittent:
Days per week discharge occurs: Duration:
12. Types of wastewater discharged to surface waters only
Discharge
Flow
(GALLONS PER DAY)
Sanitary - monthly average
Utility water, etc. - monthly average
Process water - monthly average
Stormwater - monthly average
0.009 - 0.092 MGD (range from 06/2004-05/2006)
Other - monthly average
Explain:
Monthly Average
total discharge (all types)
13. Number of separate discharge points: 1
Outfall Identification number(s) 001
14. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Un-named tributary to Jacob's Creek
15. Effluent Data
Page 3 of 5
C-MI 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
Provide data for the parameters listed. Temperature and pH shall be grab samples, for all other parameters 24-hour
composite sampling shall be used. If more than one analysis is reported, report daily maximum and monthly average.
If only one analysis is reported, report as daily maximum.
Parameter
Daily
Maximum
Monthly
Average
Units of
Measurement
Biochemical Oxygen Demand (BOD5)
N/A
N/A
N/A
Chemical Oxygen Demand (COD)
N/A
N/A
N/A
Total Organic Carbon
N/A
N/A
N/A
Total Suspended Solids
<5.0 - 25.7
11.2
MG/L
Ammonia as N
N/A
N/A
N/A
Temperature (Summer)
32.0 max
21.6
°C
Temperature (Winter)
1.0 min
9.6
°C
pH
6.18-7.45
6.59
N/A
Fecal Coliform (If sanitary waste is
present)
N/A
N/A
N/A
Total Residual Chlorine (if chlorine is
used)
<10
<10
ug/ 1
* NOTE: Data above are based on recorded values between June 2004 and May 2006 DMRs
16. List all permits, construction approvals and/or applications (check all that apply and provide permit
numbers or check none if not applicable):
Type
Permit Number Type
Hazardous Waste (RCRA) NCR00012930 NESHAPS (CAA)
UIC (SDWA) Ocean Dumping (MPRSA)
NPDES NC0086665 Dredge or fill (Section 404 or CWA)
PSD (CAA) 0873T05 Other
Non -attainment program (CAA)
Permit Number
17. List any chemicals that may be discharged (Please list and explain source and potential
amounts.)
No continuous or intermittent chemical discharges expected. Currently monitor for
BTEX series (semi-annually) with BQL results except for 1/18/2005 analysis (low results).
We are requesting removal of this semi-annual monitoring requirement.
Spills and failures of containment of fuel oil are possible but SPCC Plan in place.
18. Is this facility located on Indian country? (check one)
Yes ❑ No
19. Applicant Certification
Page 4 of 5 C-MI 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
I certify that I am familiar with the information contained in the application and that to the
best of my knowledge and belief such information is true, complete, and accurate.
Tracy B. Robinson
Printed name of Person Signing
Plant Manager
Title
7/5/6 7
gnature of Applicant Date
North Carolina General Statute 143-215.6 (b)(2) provides that: Any person who knowingly makes any false
statement representation, or certification in any application, record, report, plan, or other document files or
required to be maintained under Article 21 or regulations of the Environmental Management Commission
implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or
monitoring device or method required to be operated or maintained under Article 21 or regulations of the
Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable
by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section
1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both,
for a similar offense.)
Page 5 of 5 C-MI 03/05

Community
Water
225 (max)
Rockingham Power, L.L.C.
Rockingham County, North Carolina
Water and Wastewater Flow Diagram
Potable
Water
System
•
On -Site
Septic
System
Units 1, 2, 3, 4 & 5
Contact Stormwater
(from containments
around oil storage
sources)
Units 1, 2, 3, 4 & 5
Process Water
Storage
300
Rental
Demineralizer
NOx Injection
Water
Evaporation
A
300 (only when buming
liquid fuels)
300
Units 1, 2, 3, 4 & 5
Deminerallzed
Water Storage
Tank
Units 1, 2, 3, 4 & 5
Service Water
System
1
Area
Washdown
125
Air
Conditioner
Condensate
Intermittent 1
•
25
25
Units 1, 2, 3, 4 & 5
OIIy Water
Flow values are reported as summer average flows In gpm units.
Evaporation
105
Units 1,2,3,&4
Intermittent Blowdown
20
•
•
Int.
Units 1, 2, 3, 4 & 5
On -Line
Combustion
Turbine
Compressor Wash
1 Intermittent
Units 1, 2, 3, 4 & 5
Inlet Air
Evaporative
Cooling System
5
1 000 gallons/year
Unit 5 Intermittent
Blowdown
Units 1, 2, 3, 4 & 5
Oil/Water Separator
4
1
f
1,000 gallons/year
Off -Site
Disposal
Units 1, 2, 3, 4 & 5
Off -Line
Combustion
Turbine
Compressor Wash
Units 1, 2, 3, 4 & 5
Washwater
Storage Tanks
Plant Site Noncontact
Stormwater
Intermittent
Intermittent
100 Outfaii 001
Final Discharge to
Unnamed Tributary
to Jacob's Creek
(Current Outfall 001)

Unit 5 Evaporative
Cooling Water
Discharge
Spam.�
7
: OJW Separator
Discharge
Outfall 001
REFEN(AKZ DMAIMN.GS
LiNif
23
1.111LLW
4 O _L— — 'NM
�.w.� _ .1E�
-
_
37 r
=EE:E'I.EvR
(Lit 4-
\
22
!Him
®I L.1®
18D
•
N
2
1
a
10
11
12
13
12
IS
16
17
111
19
00
21
22
23
• 21
26
27
20
29
30
31
3a
33
34
33
36
37
o
W-.a40r I04 TURBINE EHOASuRE
Cc14EAATp61 (OPEN AIR CZ LZE)
TuRBI.E AIR INLET FILTER
EX)MC8T STAG(
.IONINISTRATIO9N WILDING
MAINTENIA..CE SHOP VARE2CuSE
COMPUTER CONTROL ROOK
OILY VAT Sip*&ATOR
SEPTIC TAW
RAV WATER STORAGE TANK
RATER FORWARDING PUMPS
FIRE VATER PUMPS
DEMIMERALIEEU WATER STORAGE TANK
DENIM R LIS'J WATER FORWARDING PUMPS
5EM4NEAALIL'R TRAILER PARKING
FUEL OIL FORWARDING PUMPS a FOAM FIRE PROTECTION
FUEL OIL TRUCK UPCOA2(MC.
FIR. OIL STOUQ TANK
RAIN STEP LP TRANSFORMER
STATION AUXILIARY TRAK:WORKER
TRANSFORMER YARD
ROAD IORAVEI, SURFACD
PARKING KORAVI. SURFACE,
suALE
LOW POINT DRAINAGE OUTFACE
GAS METERING AREA
FEARS
NOT USED
EXHAUST SILENCER
MOTORIZED GATE
MAMA. GATE
PLANT FRO- GAS NO€OOII.[ Datum A FILTER SEPARATOR
FUEL GAS METERING RUN
DIESEL GENERATOR
ELECTRICAL EW1PN.[N(T AREA
TRANSONSS10M DEAD END TOWER
GENERATOR BREAKER
NT(RCONNECTS
A FUEL GAS
I RAV a PUTAILE WATOI
C OLSTRUCTION POROR
D TEL' ENE
CPO
.2,2 HI .al
2
3
OP X
11.01
20.6
.no.0. ...Oa
'�, DYNEGY FOR REFERENCE ONLY
RO0ONgp{AM POWER PROJECT
PLOT PLAN
1Aeccr w rR
"'F
..a lS..re Z-z
T301-C-11003 1A

06/29/2006 11:23 RESEARCH & ANALYTICAL LABS 4 9510308
NO.958 D02
RESEARCH & ANAl.yTICAI
LAbORATORIES, INC.
Analytical/Process Consultations
June 29, 2006
Dynegy Operating Company
Rockingham Power
240 Ernest Drive
Reidsville, NC 27320
Attention: Dan Provenzano
Total Residual Chlorine (MC) Analysis for Selected Sampling Loations at the Rockingham Power Site
June 7, 2006
Project Name: Rockingham ,Power
Corrugated Culvert
75' below culven (in -stream)
150' below culvert (in -stream)
Inlet of retention pond
Middle of retention pond
End of retention pond
Field Tech: DR
06/07/06
06/07/06
06/07/06
06/07/06
06/07/06
06/07/06
µg/1 Q micrograms per liter = parts per billion (ppb)
< ffi less than or below detection limit

Re: NC0086665
Subject: Re: NC0086665
From: Bryn Tracy <[e-mail]>
Date: Mon, 03 Jan 2005 08:34:35 -0500
To: Charles Weaver <[e-mail]>, Tom Belnick
<[e-mail]>
Charles -- thanks for the information. The coordinates the permittee
gave (see below e-mail), appear to be the outfall and "land" almost
directly on a UT Little Jacobs Creek in Subbasin 030202; just off NC
65.
Charles Weaver wrote:
Bryn,
I've attached the fact sheet from the most recent permit renewal.
Tom Belnick noted that the receiving stream was a UT to Jacobs Creek
in subbasin 30203. However, BIMS does not locate any part of Jacobs
Creek in 030203, placing it in 030202.
I picked stream segment 22-32-(0.5) when updating BIMS as it was
closest to the location given for the UT - it also had the correct
stream classification.
However, the actual outfall location is in 030203....
Permitted flow is not limited - this is a power plant and flow
limits are not required.
Finally, the Permittee lists a lat/long of 36219'52" / 79249'40" in
their renewal application...but they don't say whether that's for
the facility or for the outfall.
C
HW
Bryn H. Tracy
NC DENR
Division of Water Quality
1621 Mail Service Center
Raleigh, NC 27699-1621
919-733-6946
/4/0 -(6 - UAi/ P/R5 w 41/(‘s.J
00 /141( /d/Ay, '
0/t/
1 of 1 1/3/2005 8:47 AM