NC0086665_Permit Issuance_20170829

Water Resources
ENVIRONMENTAL OUALITV
August 29, 2017
Laurence D. Sparks, Rockingham CT Station Manager
Duke Energy Carolinas, LLC
.240 Earnest Drive
Reidsville, North Carolina 27320
ROY COOPER
Governor
MICHAEL S. RAGAN
Secretory
S. JAY ZIMMERMAN
Director
Subject: Issuance of NPDES Permit NC0086665
Rockingham Combustion Turbine Station
240 Earnest Drive, Reidsville, NC
Rockingham County
Dear Mr. Sparks:
The Division of Water Resources (the Division or DWR) hereby issues the attached NPDES
permit for the subject facility. 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 October 15, 2007, or as
subsequently amended.
DWR regrets our delay in issuing this permit, held pending verification of Public Notice. We
did not receive the Affidavit of Publication from Rockingham Now until August 21, 2017.
Changes to Your Previous Permit. The Division acknowledges your request to discontinue
monitoring for BTEX as designated parameters of concern, based on the current monitoring
database. Considering this our review of database, the Division has relaxed the monitoring
frequency from Semiannually to Annually for Benzene, Toluene and Ethylbenzene, but Total
Xylenes monitoring remains Semiannually. Note also that we have edited for clarity Footnote 5,
Table A. (1.), concerning conditions for WET -test Annual monitoring. We have also updated
your permit text and site map for renewal.
Our records show that you have successfully registered with DWR's Electronic Discharge
Monitoring Report (eDMR) Program. Please be reminded that until the state's eDMR application
is approved compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR),
all permittees must continue to submit hardcopy of DMR as backup to eDMR reporting [see
permit section A. (3.)].
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 submitted
within thirty (30) days after receiving this letter. Your request must take the form of a written
petition conforming to Chapter 150B of the North Carolina General Statutes, and you must file it
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.

Laurence D. Sparks, Station Manager
Duke Energy Carolinas, LLC
August 29, 2017
Page 2
This permit is not transferable except after notifying the Division of Water Resources. The
Division may require permit modification, or revocation and re -issuance of this permit. Please
note that this permit does not affect your legal obligation to obtain other permits required by the
Division of Water Resources, the Division of Land Resources, the Coastal Area Management
Act, or other federal or local governments.
If you have questions, or if we can assist you further, please contact Joe R. Corporon, L.G. at
[joe.corporon�?a,ncdenr.gov] or call his direct line [phone].
S. Jay Zimmerman, PL.G.
Enclosure: NPDES Permit NC0086665 (issuance final)
hc: WSRO: Sherri Knight, SWPS Supervisor
Central Files
NPDES Program Files
ec: WSRO: Sherri Knight, SWPS Supervisor
OCB: Maureen Kinney
ATU: Susan Meadows; Cindy Moore

Permit NC0086665
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF NATURAL RESOURCES
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 Combustion Turbine Station
240 Ernest Drive
Reidsville, North Carolina
Rockingham County
to receiving waters designated as an unnamed tributary to Little 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 October 1, 2017
This permit and the authorization to discharge shall expire at midnight on April 30, 2022
Signed this day August 31, 2017
S Zimmerman, P.G., Directo
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 7

Permit NC0086665
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 to operate an existing Surface -Water Pollution Prevention System to treat stormwater, wash -
down water, calibration water, and hydrostatic tank -testing water and similar wastewaters in proximity
to above -ground storage tanks (ASTs) and appurtenant piping where total surface bulk -storage of
petroleum hydrocarbon fuels exceeds one (1) million gallons, utilizing
• oil -water separator
• polishing filter
• discharge line with hand -operated valve (normally closed)
located at Rockingham Combustion Turbine Station, 240 Earnest Drive, Reidsville, Rockingham
County, and
2. discharge from said treatment works via Outfall 001, a location specified on the attached map, into an
unnamed tributary to Little Jacobs Creek [stream segment 22-32-2], currently a Class C waterbody
within Subbasin 03-02-02 [HUC: 03010103] of the Roanoke River Basin.
Page 2 of 7

Permit NC0086665
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
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, monitored, and reported 1 by the
Permittee as specified below:
EFFLUENT
CHARACTERISTICS
[Parameter Codes]
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow 2
50050
Episodic
Instantaneous
Effluent
Total Suspended Solids
C0530
45.0 ing/L
Monthly
Grab
Effluent
Turbidity
00070
Monthly
Grab
Effluent
Temperature 3
00010
Monthly
Grab
Effluent
Benzene
34030
Annually
Grab
Effluent
Toluene
34010
Annually
Grab
Effluent
Ethylbenzene
34371
Annually
Grab
Effluent
Total Xylenes
81551
Semiannually
Grab
Effluent
WET Testing, Acute 4
TGE6C
Annually 5
Grab
Effluent
Footnotes:
1. The Permittee shall submit Monthly Discharge Monitoring Reports (DMRs) electronically in accord
with the Division's Electronic Discharge Monitoring Reporting (eDMR) Program [section A. (3.)].
2. 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 using one of the following:
• measure flow continuously
• calculate flow based on total rainfall per area draining to the outfall
• estimate flow at 20-minute intervals during the entire discharge event, or
• report flow based on discharge pump logs.
3. Temperature — Effluent temperature shall not increase the receiving -stream temperature by more
than 2.8 degrees C, nor may it ever cause the receiving -stream temperature to exceed 32 C.
4. Whole Effluent Toxicity (WET) Testing; Acute [TGE6C] using Fathead Minnow (Pimephales
promelas), 24-hour static test at an effluent concentration of 90% during the months of February,
May, August, and November.
5. Annually: Based on a positive compliance record, DWR has previously relaxed the WET -Test frequencv
to Annually However, if any WET -test should fail, the Permittee shall immediately revert to Monthly
monitoring until toxicity is resolved [see A. (2.), paragraph #3], and maintain "Quarterly" monitoring for
the remainder of the permit cycle. Thereafter, if five (5) consecutive Quarterly WET -test again indicating
"pass," the Permittee may again petition DWR to relax monitoring, as data may warrant.
Conditions:
1. The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
2. The Permittee shall discharge no tank solids, tank bottom water, or the tank rag layer.
3. Following hydrostatic testing, the Permittee shall discharge no tank (or pipe) contents unless
discharge analyses show Benzene concentration below 1.19µg/L and Toluene concentration
below 11 µg/L.
Page 3 of 7

Permit NC0086665
A. (2.) ACUTE TOXICITY PASS/FAIL - PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B .0200 et seq.]
The permittee shall conduct acute toxicity tests on a quarterly basis [except when relaxed to Annually] using
protocols defined in the North Carolina Procedure Document entitled "Pass/Fail Methodology for Determining
Acute Toxicity in A Single Effluent Concentration" (Revised December 2010 or subsequent versions). The
monitoring shall be performed as a Fathead Minnow (Pimephales promelas) 24-hour static test.
The effluent concentration, at which there may be at no time significant acute mortality, is 90% (defined as
treatment two in the procedure document). The tests will be performed during the months of February, May,
August, and November. These months signify the first month of each three-month toxicity testing quarter
assigned to the facility. Effluent sampling for this testing must be obtained during representative effluent
discharge and shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
Should any single WET test indicate failure to meet specified limits, then Monthly monitoring shall begin
immediately until such time that a single test is passed. Upon passing, this monthly test requirement will revert to
Quarterly during the months specified above.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGE6C.
Additionally, DWR Form AT-2 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water 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 there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address
cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test
requirement will revert to quarterly in the months specified above. Assessment of toxicity compliance is based on
the toxicity testing quarter, which is the three-month time interval that begins on the first day of the month in
which toxicity testing is required by this permit and continues until the final day of the third month.
Should any test data from either these monitoring requirements or tests performed by the North Carolina Division
of Water Resources 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.
Page 4 of 7

Permit NC0086665
A. (3.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[NCGS 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports.
The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)]
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge
Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted
electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit
DMRs electronically using the internet. Until such time that the state's eDMR application is compliant with
EPA's Cross -Media Electronic Reporting Regulation (CROMERR), permittees will be required to submit all
discharge monitoring data to the state electronically using eDMR and will be required to complete the eDMR
submission by printing, signing, and submitting one signed original and a copy of the computer printed eDMR
to the following address:
NC DENR / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being
physically located in an area where less than 10 percent of the households have broadband access, then a
temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring
data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or alternative forms approved by the Director.
Duplicate signed copies shall be submitted to the mailing address above. See "How to Request a Waiver from
Electronic Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the month following the issuance
of the permit or in the case of a new facility, on the last day of the month following the commencement of
discharge.
Starting on December 21, 2020, the permittee must electronically report the following compliance monitoring
data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a Waiver from
Electronic Reporting" section below).
2. Electronic Submissions
Page 5 of 7

Permit NC0086665
In accordance with 40 CFR 1 22.41(1)(9), the permittee must identify the initial recipient at the time of each
electronic submission. The permittee should use the EPA's website resources to identify the initial recipient
for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity (EPA or
the state authorized by EPA to implement the NPDES program) that is the designated entity for receiving
electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of
electronic submission and for each state. Instructions on how to access and use the appropriate electronic
reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at:
http://www2.epa.gov/compliance/final-national-pollutant-discharge-elimination-system-npdes-electronic-
reporting-rule.
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic
reporting waiver, a permittee must first submit an electronic reporting waiver request to the Division.
Requests for temporary electronic reporting waivers must be submitted in writing to the Division for written
approval at least sixty (60) days prior to the date the facility would be required under this permit to begin
submitting monitoring data and reports. The duration of a temporary waiver shall not exceed 5 years and shall
thereupon expire. At such time, monitoring data and reports shall be submitted electronically to the Division
unless the permittee re -applies for and is granted a new temporary electronic reporting waiver by the Division.
Approved electronic reporting waivers are not transferrable. Only permittees with an approved reporting
waiver request may submit monitoring data and reports on paper to the Division for the period that the
approved reporting waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)].
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section
B. (11.) (a) or by a duly authorized representative of that person as described in Part II, Section B. (11.) (b). A
person, and not a position, must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account and
login credentials to access the eDMR system. For more information on North Carolina's eDMR system,
registering for eDMR and obtaining an eDMR user account, please visit the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Page 6 of 7

Permit NC0086665
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the
following certification [40 CFR 122.22].
NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED:
'7 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 f nes and imprisonment for knowing violations."
Records Retention [Supplements Section D. (6.)]
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of at least 3 years from the date of the report. This period
may be extended by request of the Director at any time [40 CFR 122.41].
Page 7 of 7

Little Jacob Creek
(flows north)
Outfall 001
Lat 36° 19' 42" N
Long 79 ° 49' 45" W
(discharge flows west, then north)
Duke Energy Carolinas, LLC
Rockingham Combustion Turbine Station
State Grid/Quad: B19SE/ Bethany, NC
Sub -Basin: 03-02-02 Stream Class: C
River Basin: Roanoke HUC: 03010103
Receiving Stream: UT to Little Jacobs Creek Stream Segment: 22-32-2
Approximate Property
Boundary
Facility
Location
not to scale
North
NPDES Permit NC0086665
Rockingham County

FACT SHEET
EXPEDITED - PERMIT RENEWAL
NPDES NC0086665
Basic Information for Expedited Permit Renewal
Permit Writer/Date
Joe R. Corporon L.G. / 26Jun2017 1
Permit Number - County - Region
NC0086665 -Rockingham Coun `- WSRO
Facility Name
Rockingham Combusti Turbine Station (Gas Fired)
Basin Name/Sub-basin number
Roanoke / 03-02-02
Receiving Stream
UT to Little Jacobs Cr [segment 22-32-2]
Stream Classification in Permit
C
Does permit need Daily Max NH3 limits?
No .
Does permit need TRC limits/language?
No
Does permit have toxicity testing?
Yes
Does permit have Special Conditions?
No
Does permit have instream monitoring?
No
Is the stream impaired (on 303(d) list)?
No
Any obvious compliance concerns?
No
Any permit MODs since last permit?
No
Request for Renewal
October 17, 2016
Current expiration date
April 30, 2017
New expiration date
April 30, 2022
Comments:
COGEN classified "minor" industry
(see Renewal; Approach).
Facility Description. Rockingham Combustion Turbine Station dispatches backup and peaking power
in support of the regular Duke Energy system. The station consists of five (5) simple -cycle gas turbine
generators designed to produce about 180 megawatts each, for a total possible 900 MGW. Wastewater
treatment begins with an oil/water separator (OWS) followed by a coalescing filter (11,600-gallon
capacity). Principal fuel consumption includes natural gas and #2 diesel.
Renewal Approach. This facility is not coal-fired, but natural-gas fired with self-contained backup
storage of #2 diesel. In deference to Federal categorical 40 CFR 423, North Carolina has never
considered this facility a "major" industry, but permitted it as a "minor" industrial discharger. Treated
wastewater and stormwater drain to a single outfall (001) requiring compliance monitoring. No
changes recommended, except as follows.
Correspondence with the Permittee - The renewal application requests the Division to remove
monitoring for BTEX, based on the existing database. Upon consideration, the Division relaxed the
monitoring frequency from Semiannually to Annually for Benzene, Toluene and Ethylbenzene, but
Total Xylenes monitoring remains Semiannually based on irregular detections in the effluent.
Page 1 of 2

This facility discharges to a UT to Little Jacobs Creek under zero -flow receiving -stream conditions.
These conditions allow no credit for dilution from the receiving stream. Discharge over five years
(2012-2017 averages 0.0166 MGD with a max reported at 0.162 MGD.
Toxicity: The Permittee passed all annual Whole Effluent Toxicity (WET) tests since 2012.
Compliance: During this past permit cycle, this facility's database shows only two "monitoring
frequency" violations for the parameters Naphthalene and Effluent Temperature; neither infraction
proceeded to civil -penalty assessment (see attached).
Renewal Summary:
1. updated permit format and map
2. relaxed monitoring frequency from Semiannual to Annual
for Benzene, Toluene and Ethylbenzene.
3. retained Semiannual for Total Xylenes
4. included eDMR text
Schedule to Issue:
Public Notice June 26, 2017
Approximate Issue Date . July 31, 2017
Effective Date August 2017
Page 2 of 2

Joe Permitting LOG
Joe R. Corporon, L.G.
86665 DUKE Energy Carolinas LLC - Rockingham Combustion
Turbine Station - Gas -Fired COGEN
fuel -oil backup / no reclass to "Major"
28Feb2017 -- retrieved file folder.
31Mar2017 -- generated draft; met with Sergei to ask about TOX page (currently "monitoring
only" annually); he said he would switch to acute pass/fail. If we do that, we need text to require
resampling in the event of failure. Joe discussed w/ John; add quarterly, limited TAE6C, add text
explaining "in the event of failure...."
02May2017 -- Joe discussed permitting approach w/ John Hennessy; noted that "gas fired"
power generation is covered under 40 CFR 423 despite DWR permitting since 2001 (beginning
with Tom Belnick) as bulk -storage only. Considering that this is Duke (new owner), I questioned
John, asking if we should possibly update the permit; John to consider.
12May2017 -- Joe again discussed renewal w/ John; we decided that he would review my latest
for sister site 65081 (in progress) as an example moving forward.
--on HOLD pending review of policy by John/Julie/Jeff.
26May2017 -- because "gas fired" - John told Joe to proceed with renewal as minor for ""all gas -
fired" cogens.
20Jun2017 -- generated draft docs;
21Jun2017 -- generated Fact Sheet; updated Public Notice System; updated BIMS Events;
emailed draft docs to list (inadvertently excluded addressee, Manager Sparks); submitted file to
Wren for Public Notice on 26Jun2017. FINAL Due to John Hennessy on 04Aug2017.
27Jun2017 -- ad approved by Wren;

02Ju12017 -- ad ran in Reidsville/Rockingham News, according to Wren
14Ju12017 -- received file back from Wren. Paul DiMatteo (WSRO) email back (10:47 AM) -
"No comments on DRAFT."
20Ju12017 -- No Affidavit to date.
11Aug12017 -- No Affidavit to date. sent reminder to Wren, cc John. Don Safrit (DUKE
Enviro-tech) called to ask for a copy; he said he did not get a copy; needed to check the
distribution list; I said it was mailed to Laurence D. Sparks (station Manager). I answered his
email, sending him a copy of the permit DRAFT/Fact Sheet. I shared with Don that permit
issuance, while expected in August, has been delayed due to a missing Affidavit of Publication.
-- on hold pending missing Affidavit.
21Aug2017 -- received [after 56 days] Affidavit of Publication on 02Jul2017; Joe to continue
renewal.
25Aug2017 -- generated FINALS; submitted file to John Hennessy for signature, letter
dated 29Aub2017.
* After submittal to John, Joe talked to Julie Grzyb (NPDES) about "Annual" vs Quarterly
sampling; she met today w/ ATB; Julie says "ATB has never approved Annual monitoring
[issued in this permit and others since before 2005. Julie to discuss w/ John; write a memo to Jeff
(?) instructing permit writers to correct all Annual WET -testing to Quarterly.
Joe retrieved file from John Hennessy pending discussion RE WET -test edit.
-- issuance suspended.
28Aug2017 -- discussed "Annual" WET testing w\ John in Staff Meeting; "ATB does not decide
permitting policy" John said. Decided to leave it "Annual" in keeping w/ past renewals back to
2005. resubmitted file to John Hennessy for signature, letter dated 31 Aug2017. John returned
file signed;
29Aug2017 -- Joe emailed to list, cc Julie. Updated BIMS Limits and Events; submitted file to
Charles Weaver for issuance.

Advertising Affidavit
( Account Number
4002143
1921 Vance Street
Reidsville, NC 27320
[phone] Fax: [phone]
NCDENR DWQ NPDES
ATTN DINA SPRINKLE
RALEIGH, NC 27699
Date
July 02, 2017
PO Number Order
Category
Description
NPDES WASTEW 0000364840 _
PUBLIC NOTICE
North Carolina Environmental
Management Commission/
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699.1617
Notice of Intent to Issue a NPDES
Wastewater Permit
The North Carolina Environmental
Management Commission proposes
to issue a NPDES wastewater dis-
charge permit to the person(s) listed
below. Written comments regarding
the proposed permit will be accept-
ed until 30 days after the publish
date of this nntice. The Director of
the NC Division of Water Resources
(DWR) may hold a public hearing
should there be a significant degree
of public interest, Please mail com-
ments and/or information requests
to DWR at the above address. Inter-
ested persons may visit the DWR at
512 N. Salisbury Street, Raleigh, NC.
to review information on file. Addi-
tional Information on NPDES permits
and thls notice may be found on cur
website: http://deq.nc.gov/abort/di
visions/water-resources/water-
resources•permIts/wastewater-
branch/np_des-wastewater/public-
notices,or by calling [phone].
Rehabilitation Center WWTP/
Rockingham County. Facility dis-
charges to HagansCreek/Roanoke
River Basin. Currently, dissolved
oxygen, MBAs, and total residual
chlorine are water quality Ilmited.hs
Creek, Roanoke River Basin.
Rockingham County Schools re-
quested renewal of permit
NC0037001: Bethany Elementary
School WWTP. Facility discharges
to Hufflnes Mill Creek/Roanoke Riv-
er Basin. Currently ammonia nitro-
gen, fecal coliform, and total residu-
al chlorine are water quality limited.
Donna Neal Givens & Cathy Neal
Bason requested renewal of NPDFS
permit NC0060542/Gold Hill MHP
WWTP/Rockingham County. Facility
discharges to an unnamed tributary
to Hogans Creek/Roanoke River Ba-
sin. Currently, 80D, ammonia nitro-
gen, dissolved oxygen, fecal
coliform, and total residual chlorine
are water quality limited.
Duke Energy Carolinas, LLC has ap-
plied to renew NPDES permit
NC0086665 fur Rockingham County
Combustion Turbine Station, 290
Ernest Drive, Reidsville, Rockingham
County, discharging UT of Little Ja-
cobs Creek, Roanoke River Basin.
Legal Notices
PUBLIC NOTICE North Carolina Environmental Management Commission/ NPDES Unit 1617
Publisher of the
Rockingham Now
Before the undersigned, a Notary Public of Guilford, North Carolina, duly commissioned,
qualified, and authorized by law to administer oaths, personally appeared the Publisher
Representative who by being duly sworn deposes and says: that he/she is the Publisher's
Representative of the Rockingham Now, engaged in the publishing of a newspaper known
as Rockingham Now, published, issued and entered as second class mail in the City of
Reidsville, in said County and State: that he/she is authorized to make this affidavit and
sworn statement: that the notice or other legal advertisement, a copy of which is attached
hereto, was published in the Rockingham Now on the following dates:
07/02(2017
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 meeting all
the requirements and qualifications of Section 1-597 of the General Statutes of North
Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General
Statutes of North Carolina.
{r J'�J/
/� ` l/J
(signature of person making cr frdavit)
Sworn to and subscribed before me the 3 day of July, 2017
LEA ANNE LAMB
NOTARY PUBLIC
STATE OF NORTH CAROLINA
GUILFOR%) COUNTY
MY COMMISSION EXPIRES 06-15-19
(Notary Public)
IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

NC0086665', Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086665 Duke Energy
NC0086666 Duke Energy
NC0086665,
NC0086665
NC0086665
NC0086665
NC0086665
NC0086665 i
NC0086665
NC0086665
NC0086665
NC0086665
NC0086665
NC0086665
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
Duke Energy Carolinas LLC -
8 11 2015
9 10 2015
10 1 2015
11 4 2015
12 2 2015
1 6 2016
2 3 2016
3 18 2016
4 1 2016
5 4 2016
6 7 2016
7 7 2016
8 3 2016
9 8 2016
10 4 2016
11 28 2016
12 2 2016
1 4 2017
2 21 2017
2 7 2012
1 8 2013
1 7 2014
1 15 2015
10 1 2015
1 6 2016
1 4 2017
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
C0530 - TSS
TAE6C - LC50 Static 24hr Acute F
TAE6C - LC50 Static 24hr Acute F
TAE6C - LC50 Static 24hr Acute F
TAE6C - LC50 Static 24hr Acute F
TAE6C - LC50 Static 24hr Acute F
TAE6C - LC50 Static 24hr Acute F
TAE6C - LC50 Static 24hr Acute F
mg/I
mg/I
mg/I
mg/I
mg/I
mg/I
mg/I
mg/I
mg/I
mg/►
mg/I
mg/I
mg/I
mg/I
mg/I
mg/I
mg/I
mg/I
mg/I
percent
percent
percent
percent
percent
percent
percent
5
5
5
5
5
5
5
5
5
5
5.21
5
14.2
5
5.2
6.6
7.6
5
5
100
100
100
1
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
LESSTHAN
GRATRTHN
GRATRTHN
GRATRTHN
WAIVER
79
100 GRATRTHN

N RGY fECO PY
October 14, 2016
Rockingham CT Station
240 Earnest Drive
Reidsville. NC 27320
Mr. Tom Belnick, Supervisor
NPDES Complex Permitting
NC DEQ/DWR/WQ Permitting Section
1617 Mail Service Center
Raleigh, NC 27699-1617 RECEIVEDINCDEQIDWR
Subject: Rockingham Combustion Turbine (CT) Station
National Pollutant Discharge Elimination System
NPDES Permit No. NC0086665
Renewal Application
Dear Mr. Belnick:
OCT 17 2016
Water Quality
Permitting Section
The current NPDES permit for the Rockingham CT Station expires on April 30, 2017. Duke
Energy Carolinas, LLC hereby requests that the NPDES permit for the facility be reissued.
Enclosed for your consideration and review is NPDES Permit Application Short Form C - Minor
Industrial, in triplicate.
With reissuance of the NPDES permit, Duke Energy Carolina, LLC requests the following:
Removal of Monitoring for Benzene, Toluene, Ethylbenzene and Xylene (BTEX) - Outfall
001
Duke Energy Carolinas, LLC respectfully requests benzene, toluene, ethylbenzene and xylene
(BTEX) be removed from the monitoring requirements associated with Outfall 001. A similar
request had been made during the previous NPDES renewal application process but the
request was not honored due to an insufficient data size (n=7). Following the effective date of
the previous permit (August 1, 2012), Duke Energy Carolinas, LLC proceeded to collect and
analyze additional Outfall 001 effluent BTEX samples. Since October 2012, we have collected
and analyzed twenty-one (21) sets of BTEX samples. Table 1 summarizes the BTEX results.
Table 1 - Rockingham Outfall 1 BTEX Analytical Results
Date
Benzene (ug/I)
Toluene (ug/I)
Ethylbenzene (ug/l)
Xylene (ugil)
October 2012
<1.0
<1.0
<1.0
; 3.20
November 2012
<1.0
<1.0
<1.0
:' 2.61
December 2012
<1.0
<1.0
<1.0
1.92
'
January 2013
<1.0
<1.0
<1.0
<1.1)
February 2013
<1.0
<1.0
<1.0
6.68)
March 2013
<1.0
<1.0
<1.0
<1.0
April 2013
<1.0
<1.0
<1.0
<1.0
May 2013
<1.0
<1.0
<1.0
<1.0

NC DEQ/DWRIWQ Permitting Section
Page 2 of 2
Table 1 - Rockingham Outfall 1 BTEX Analytical Results (continued)
Date
Benzene (ug/I)
Toluene (ug/I)
Ethylbenzene (ug/I)
Xylene (ug/I)
June 2013
<1.0
<1.0
<1.0
<�.Ct,
July 2013
<1.0
<1.0
<1.0
2.4 ,
August 2013
<1.0
<1.0
<1.0
<6.
September 2013
<1.0
<1.0
<1.0
<1.0
October 2013
<1.0
<1.0
<1.0
<1.0
November 2013
<1.0
<1.0
<1.0
<1.0
December 2013
<1.0
<1.0
<1.0
<1.0
January 2014
<1.0
<1.0
<1.0
<1.0
July 2014
<1.0
<1.0
<1.0
<1.0
January 2015
<1.0
<1.0
<1.0
<1.0
July 2015
<1.0
<1.0
<1.0
<1.0
August 2015
<1.0
<1.0
<1.0
<1.0
January 2016
<1.0
<1.0
<1.0
<1.0
Maximum Value
Minimum Value
Average
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
3.68
<1.0
0.60*
Note: * values less than one ug/1 ( <1,0) are considered as zero (0) for calculation of average.
If you have any questions regarding the enclosed information, please contact Mr. Don Safrit,
P.E., at [phone] or Ms. Dana Newcomb at [phone].
1 certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified
personnel properly gather and evaluate the information submitted. Based on my inquiry of the
person or persons who manage the system, or those persons directly responsible for
gathering the information, the information submitted is, to the best of my knowledge and
belief, true, accurate, and complete. 1 am aware that there are significant penalties for
submitting false information. including the possibility of fines and imprisonment for knowing
violations.
Lawrence D. Sparks
Dan River CC/Rockingham CT General Manager
Enclosures:
NPDES Permit Application - Short Form C - Minor Industrial
Rockingham Combustion Turbine Water Schematic Diagram
Figure 1 - Rockingham CT Station Discharge Location Map
cc: Ms. Dana Newcomb
Mr. Don Safrit
NC DEQ DWR WSRO

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
1. Contact Information:
Owner Name
Facility Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
e-mail Address
NPDES Permit Number NC00866651
Please print or type.
Duke Energy Carolinas, LLC
Rockingham Combustion Turbine Station
240 Earnest Drive
Reidsville
North Carolina 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
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
4. Ownership Status:
Federal ❑
Duke Energy Carolinas, LLC
526 South Church Street, EC13K
Charlotte
North Carolina 28201
[phone]
[phone]
State ❑
Private ® Public ❑
Page 1 of 5 C-MI 10/08

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
5. Standard Industrial Classification (SIC) code(s): 4911
6. Number of employees: 11
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.
The wastewater system is primarily for the treatment of storm water, process water,
system blow downs, wash downs, air conditioning condensate and other discharges
associated with the operation of the gas turbines. The treatment system is designed to
remove oil/fuel from the wastewater. The treatment system consists of an oil water
separator (OWS) with a coalescing filter that functions as a polishing filter. Wastewater
is collected in the OWS sump, passes through the OWS and then is pumped through
one of two polishing filter before discharge to the 001 outfall.
The OWS and coalescing filter have a capacity of 11,600 gallons. The discharges are
primarily influenced by precipitation and plant operations, which can vary greatly
seasonally. Design, average, and maximum instantaneous discharge flow rates from the
OWS and 001 outfall range between 100 and 500 gpm respectively depending on if one or
both filters are running. Discharge duration varies from 30 - 60 minutes.
The oil and solids collected by the OWS are pumped out by a contractor and taken off
site for recycling and disposal as needed. These cleanouts occur once a year, with the
last cleaning being completed inMarch of 2016.
8. Is facility covered under federal effluent limitation guidelines? No ® Yes ❑
If yes, specify the category? N/A
9. Principal product(s) produced: Electricity
Principal raw material(s) consumed: Natural gas, #2 diesel fuel, water
Briefly describe the manufacturing process(es):
The plant consists of five simple cycle gas turbine generator units producing
approximately 180 megawatts each for a total generating capacity of approximately
900 megawatts. The primary fuel consumed is natural gas, with #2 diesel fuel as a
secondary fuel. Raw water is processed through portable demineralizer trailers
and stored in a 1.4 million gallon tank.
During the operation of the units, demineralized water is injected into the units for
NOx control.
The plant is dispatched for peaking and back-up power to support the regulated
Duke Energy system.
Page 2 of 5 C-MI 10/08

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
10. Amount of principal product produced or raw material consumed
(List specific amounts consumed and/or units of production over the last three years
Product Produced or Raw
Material Consumed 2013-2015
(AVERAGE)
Product Produced or Raw
Material Consumed 2013-2015
(PEAK)
Product Produced or Raw
Material Consumed 2013-2015
(AVERAGE)
Product Produced or Raw
Material Consumed 2013-2015
(PEAK)
per Day
69,000 MMBTU of Natural Gas
86,000 MMBTU of Natural Gas
28,500 MMBTU of Fuel Oil
73,000 MMBTU of Fuel Oil
per Month
400,000 MMBTU of Natural Gas
692,000 MMBTU of Natural Gas
57,000 MMBTU of Fuel Oil
170,000 MMBTU of Fuel Oil
per Year
4,800,000 MMBTU of Natural Gas
8,300,000 MMBTU of Natural Gas
228,000 MMBTU of Fuel Oil
510,000 MMBTU of Fuel Oil
11. Frequency of discharge: Continuous ❑ Intermittent EI
If intermittent:
Days per week discharge occurs: 3-5 Duration: 0.5 - 1 hours
12. Types of wastewater discharged to surface waters only
Discharge
Flow
(GALLONS PER DAY)
Sanitary - monthly average
N/A - Site has septic tank system.
Utility water, etc. - monthly average
1,000 gpd
Process water - monthly average
N/A - Process water is consumed in the operation of
the units.
Stormwater -monthly average
9,000 - 12,000 gpd per discharge event depending on
rainfall amounts.
Other - monthly average
Explain:
N / A
Monthly Average
total discharge (all types)
31,000 gpd
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):
Unnamed tributary of Little Jacobs Creek; flows to Jacob's Creek and ultimately to the Dan River
in the Roanoke River Basin. Outfall is located at 36 I9' 42" N and 79 49' 5" W.
Page 3 of 5
C-MI 10/08

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
15. Effluent Data [for new or proposed discharges]
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.
NOTE: Permittees requesting renewal should complete the table ONLY for the parameters
currently monitored. Summarize the past 3 years of effluent data.
Parameter
Daily
Maximum
Monthly
Average
Units of
Measurement
Biochemical Oxygen Demand (GODS)
*
*
*
Chemical Oxygen Demand (COD)
*
*
Total Organic Carbon
*
*
*
Total Suspended Solids
11.0
5.0
mg/1
Ammonia as N
*
*
*
Temperature (Summer)
30.8-
23.6°
Degrees Celsius
Temperature (Winter)
25.6°
14.1 °
Degrees Celsius
pH
*
*
*
Fecal Coliform (If sanitary waste is
present)
*
*
*
Total Residual Chlorine (if chlorine is
used)
*
*
*
Flow (MGD)
0.069
0.031
MGD
Naphthalene
*
*
ug/1
Benzene
<1.0
<1.0
ug/1
Toluene
<1.0
<1.0
ug/1
Ethyl Benzene
<1.0
<1.0
ug/1
Xylene
<1.0
<1.0
ug/1
* - Not currently monitored
16. List all permits, construction approvals and/or applications (check all that apply and provide permit
numbers or check none if not applicable):
Permit
Type Permit Number Type Number
Hazardous Waste (RCRA) NCR000012930 NESHAPS (CAA) 08731T15
U1C (SDWA) Ocean Dumping (MPRSA)
NPDES NC0086665 Dredge or fill (Section 404 or
PSD (CAA) Other FRPO4NC440
Non -attainment program
(Facility Response Plan)
Page 4 of 5
C-MI 10/08

NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial
•
Minor industrial, manufacturing and commercial facilities.
17. List any chemicals that may be discharged (Please list and explain source and potential
amounts.)
Diesel Fuel — Catastrophic failure of fuel system could result in diesel fuel being discharged from
the site. This facility is covered under a Facility Response Plan (FRP). In a worst case scenario, a
maximum of 1.7 million gallons of diesel fuel could be released.
18. Is this facility located on Indian country? (check one)
Yes ❑ No
19. Applicant Certification
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.
Lawrence D. Sparks
Printed name of Person Signing
Rockingham CT Station Manager
Title
A-3441/2-0/6,
Signature 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.)
C-MI 10/08

Community
Makeup Wale,
i Pota tti
r Water
System
(in -sacs
Septic
System
Contact Stormwater
:train (:CIWAII1111e11N
around oll storage
solac0s)
27't
Rockingham Combustion Turbine Water Schematic Diagram
NPDES Permit NC0086665 - Rockingham County
lien ire V. aler
Storage Tank
0.5 MG ('aparns
Service
Water
'i'/S1BR
Area
4'/ashdov: ^
25
I 1 el mittrsil
anti
1?5
140a Irlectron
Water
30C (only wnun (lurlatg 5r1 (whey miming ;,as, t.vaporatmr
lyuid fuels)
Rental
Demlrerabter
Mr
Conditioner
Condensate
70m
Demmeralizer
Water Storage
Tank
1.4 %I(. ('aparit
Evaparst,on
Ins
Intermittent
Inlernatter'!
C13n galfvr
Inlet Air &vaporat've
Coolvtn 6yg!am
Irtle lingo-n!
Blawri0w^
Units 1-4
zc
Invrrnr!ten1
t3lowdown
J^t! 5
GIIPAlater
Separator
Orly Wales
rn-urge Cr
f;rmprr!ss0r
Wash
Or:.mc C'
t r:nmpr�sor
Wasp
11VasIe: 11er
Sl!Mr
1 000 gaoyr
)fl-Slit Disposal
inte'm Item
Mort -contact
St rmwatat
OU rALL
001
Rolf; The matonty of thes^ lows shculo .^.e :ons tiered 11term.item rlow lhdl—Gallons Per Minute tgpm;
V
n
n
a
m
e
d
T
b
u
a
y
T
0
a
•
b
s
C
r
e
k