NC0003417_Correspondence_20211215

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
S. DANIEL SMITH
Director
Ms. Jessica Bednarcik, Senior Vice President
Environmental, Health and Safety
Duke Energy Carolinas, LLC
Mail Code EC13K
P.O. Box 1006
Charlotte, North Carolina 28201-1006
Dear Ms. Bednarcik:
NORTH CAROLINA
Environmental Quality
August 10, 2021
Subject: Draft NPDES Major Modification
Permit NC0003417
H.F. Lee Energy Complex
Wayne County
Facility Class I
The Division has received your request for a Major Modification to the subject permit. The request
has been granted. Enclosed with this letter is the Draft Major Modification that includes necessary changes.
Please review this document to ensure thorough understanding of the conditions and requirements it
contains.
The Draft Major Modification contains the following significant changes from your current permit:
1) Four new emergency spillways have been added to the Inactive Ash Basins 1, 2, and 3. A new map
was added to the permit to depict emergency spillways.
2) Outfall 003 was removed from the permit.
3) The combined flow limit for Outfall 005a and Outfall 005b have been increased from 2 MGD to 8
MGD. The flow limit was also changed from Daily Maximum to Monthly average to be consistent
with other Duke permits.
4) The Water Quality Based Effluent Limits for Total Selenium were added to the permit (Outfall 005a
and Outfall 005b) based on the results of the RPA.
5) Monthly Monitoring for Total Antimony and Total Thallium was added to the permit (Outfall 005a
and Outfall 005b) based on the results of the RPA.
Please provide any comments you have regarding the draft permit to this office by September
13, 2021. At this time, the Division is also publishing a notice in the newspapers of general circulation in Wayne
County, inviting public comment on the Draft Modification. Following the 30-day comment period, we will
review all pertinent comments received and take appropriate action on the permit modification.
NORTH CAROLINA
Oepa,hnent of Environmental Quality
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
919.707.9000

If you have any questions about the NPDES permit process, please contact me at the following e-
mail address: [e-mail], or telephone number: 919-707-3606.
cc: Central Files
NPDES Files
EPA Region IV (e-copy)
Washington Regional Office/Water Quality (e-copy)
Washington Regional Office/PWS (e-copy)
WSS/Aquatic Toxicology Unit (e-copy)
G=D_E
NORTH CAROLJNA
Department al Environmental Quality
Sincerely,
Sergei Chernikov, Ph.D.
Environmental Engineer III
Industrial NPDES Permitting Unit
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
919.707.9000