NC0003425_Correspondence_20170101 (3)

Water Resources
ENVIRONMENTAL QUALITY
12017
Mr. Mike Mosley, Plant Manager
Duke Energy Progress
Roxboro Steam Electric Plant
1700 Dunnaway Rd
Semora, North Carolina 27343
Subject: NPDES Permit Renewal
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. JAY ZIMMERMAN
Director
Permit NC0003425
Roxboro Steam Electric Plant
Person County
Class 11 Facility
Dear Mr. Mosley:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between
North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently
amended).
In response to your comments the Division offers the following responses:
• Include extracted groundwater as contributing flow to 003 and 001. - The groundwater flow was
not included because it is not an existing source and it has not been characterized. Since the
groundwater treatment system is not in operation and is not expected to commence for
approximately three years a permit modification is more appropriate when the system is designed
and a wastewater characterization is provided.
• List retention basis as potential flow path for cooling tower blowdown (Outfall 005) - the retention
basin (012B) is listed as potential flow path for outfall 005.
• List retention basin as potential flow path for domestic wastewater (Outfall 008) - the retention
basin (012?) is listed as potential flow path for outfall 008.
• List retention basin for potential flow path for landfill leachate - the retention basin (012A) is
listed as potential flow path for the landfill leachate.
• Modify WET sampling frequency from monthly to quarterly for outfall 001- the sampling
frequency will not be modified, all the outfalls for seeps receive monthly sampling for WET.
• Footnote for outfall 001 related to fly ash discharges should read "no fly ash should be discharged
after November 1, 2018 - the footnote was corrected.
• Remove pH limitations from internal outfalls 002, xx,x,xx - the pH limit was removed for outfalls
xx,xx
• Clarify that flow limit of 2.0 MGD only applies for interstitial water treated through
physical/chemical treatment - The flow limit is only listed on the effluent and limitations
requirements for the dewatering of the ash basin.
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919 807 6300

Mr. Mosley
• Add language on special condition A.(5) to include that the cooling water can be discharged
through the retention basin or the discharge canal - the flow path is already included in the
supplement to cover sheet, it will not be included in the outfall description in condition A.(5).
• Remove monthly average limit for selenium in outfall 006, this outfall is not continuous and is
associated with precipitation events only - the limits will be modified to reflect the acute nature
of the discharge.
• Add the following language to Condition A.(15): "All previously identified seeps from this
facility are contributing floes to outfalls 003 and 001. There are no seeps that discharge directly to
jurisdictional waters". List all the seeps that are tributary to outfall 003 -
• Clarify language in condition A.(19) that temperature readings from the afterbay will be obtained
from the existing USGS Gaging station and that a malfunction of the station will not be considered
a violation of the permit -
The following changes were implemented in the permit after consideration to public comments submitted
to the Division during the public comment period and the public hearing:
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable
to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following
receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of
the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail
Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be
final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the legal requirements
to obtain other permits which may be required by the Division of Water Resources or any other Federal,
State, or Local governmental permits that may be required.
If you have any questions concerning this permit, please contact Teresa Rodriguez at [phone] or via
email at [e-mail].
Sincerely,
S. Jay Zimmerman, P.G.
Director, Division of Water Resources, NCDEQ
Hardcopy: NPDES Files
Central Files
DWR/Raleigh Regional Office / Water Quality Program
Ecopy: US EPA Region 4
DWR/Aquatic Toxicology Branch/Susan Meadows
2

Mr. Mosley