NC0003425_Correspondence_20160826

PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Secretary
S. JAY ZIMMERMAN
Director
Water Resources
ENVIRONMENTAL QUALITY
August 26, 2016
Mr. Mike Mosley, Plant Manager
Duke Energy Progress
Roxboro Steam Electric Plant
1700 Dunnaway Rd
Semora, North Carolina 27343
Subject: Draft NPDES Permit Renewal
Permit NC0003425
Roxboro Steam Electric Plant
Person County
Class II Facility
Dear Mr. Mosley:
Enclosed with this letter is a copy of the draft permit renewal for your facility. Please review this draft
carefully to ensure thorough understanding of the conditions and requirements it contains. There are
several changes from the existing permit, including the following:
• Effluent Limits and Monitoring Requirements were added for outfall 002 for the dewatering
phase of the ash pond.
• Quarterly monitoring for selenium was added to outfall 006.
• Monitoring for beryllium, vanadium, antimony and silver were eliminated for outfall 010.
• Outfall 011 was added to the permit for the discharge of the new FGD system.
• Outfall 012 was added to the permit to monitor the effluent of the proposed dual retention basin
treatment system.
• Limits for arsenic, selenium, mercury and nitrate/nitrite were added for outfall 010 and 011 as
per 40 CFR 423.
• Outfall 001 was reinstated in the permit to monitor the discharge of seeps and stormwater.
• Special condition A. (8) Effluent Limits and Monitoring Requirements (Outfall 008) was added for
the expansion of the wastewater treatment system to 0.025 MGD.
• The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by the NC
Environmental Management Commission (EMC) on November 13, 2014. The US EPA
subsequently approved the WQS revisions on April 6, 2016 with some exceptions, one being the
disapproval of action level policy for permitting silver, copper and zinc. In addition, the total
metal aquatic life criteria for chromium, iron, and manganese were deleted from the NC water
quality standards rules.
The NC Division of Water Resources NPDES Permitting Unit is required to implement the new
dissolved metal standards in all permits public noticed after April 6, 2016. The new standards for
most metals include acute standards. Further, the freshwater standards for several metals are
expressed as the dissolved form of the metals, and seven metals have hardness -dependent
equations. The permit includes the requirement to sample for hardness at instream stations 4C
and 4D.
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
Page 2
• A reasonable potential analysis (RPA) was performed for outfall 003 utilizing the new standards.
As a result of the RPA the following changes were incorporated to the permit:
o Quarterly monitoring for total arsenic, total thallium, chloride and total selenium.
• Special Condition A. (14) was eliminated from the permit. The cooling water blowdown can be
discharged to the ash pond or to the discharge canal.
• Special Condition A. (26) was added to the permit regarding the submittal of all the required
information under 40 CFR 125.95 with the next permit application.
• Starting December 21, 2016, federal regulations require electronic submittal of all discharge
monitoring reports (DMRs) and specify that, if a state does not establish a system to receive such
submittals, then permittees must submit DMRs electronically to the Environmental Protection
Agency (EPA). The final NPDES Electronic Reporting Rule was adopted and became effective on
December 21, 2015.
The requirement to begin reporting discharge monitoring data electronically using the NC
DWR's Electronic Discharge Monitoring Report (eDMR) internet application has been added to
your final NPDES permit. [See Special Condition A (29)] For information on eDMR, registering
for eDMR and obtaining an eDMR user account, please visit the following web page:
ht!p://deq.nc.gov/about/divisions/water-resources/edmr.
For more information on EPA's final NPDES Electronic Reporting Rule, please visit the following
web site:
/www2.e]2a.gov/coinpliance/final-national-12ollutant-discharge-elimination-system-
npdes-electronic-reporting::Lule.-rule.
• The following special conditions were added to the permit to be consistent with other Duke
Energy permits: A. (19) Applicable State Law, A. (20) PCB Prohibition, A. (24) Ash Pond closure,
A. (28) Biodices, A. (30) Additional Conditions and Deffinitions.
Concurrent with this notification the Division is publishing a notice in a newspaper having circulation in
the general Person County area, soliciting public comments on this permit draft. Please provide any
comments you may have to the DEQ - DWR, NPDES Program no later than 30 days after receiving this
draft permit.
Following the 30-day public comment period, the Division will review all pertinent comments and take
appropriate action prior to issuing a final permit. If you have questions concerning this draft permit,
please call me at [phone] or by email at [e-mail].
Sincerely,
Teresa Rodriguez
NPDES Complex Permitting Unit
cc: NPDES Files
EPA Region 4 (e-copy)
Raleigh Regional Office / Water Quality Program (e-copy)
Raleigh Regional Office / Public Water Supply (e-copy)

Mr. Mosley
Page 3
Operators Certification Program (e-copy)
Aquatic Toxicology Branch (e-copy)