The URL can be used to link to this page

Home My WebLink AboutNC0004987_Draft Cover_20160515Water Resources ENVIRONMENTAL QUALITY May 17, 2016 Mr. Harry Sideris, Senior Vice President Environmental, Health and Safety Duke Energy Carolinas, LLC Mail Code EC 13K P.O. Box 1006 Charlotte, North Carolina 28201-1006 PAT MCCRORY Governor DONALD R. VAN DER VAART Secretary S. JAY ZIMMERMAN Subject: Draft NPDES Permit Permit NC0004987 Marshall Steam Station Catawba County Facility Class I Dear Mr. Sideris: Director Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft very carefully to ensure thorough understanding of the conditions and requirements it contains. The draft permit contains the following significant changes from your current permit: • The Seep Outfalls 101 and 102 (Please see A. (8.) and A. (9.)) and Seep Pollutant Analysis Special Condition (Please see A. (30.)) were added to the permit. • A separate effluent page for the dewatering of the ash ponds (Outfall 002) was added to the permit (Please see Special Condition A. (3.)). • The Section 316(b) of CWA Special Condition was updated to reflect the new regulations. • The turbidity limit was added to the permit (Outfall 002) to meet the state turbidity standard per 15A NCAC 2B .0211(3) (k). • The Technology Based Effluent Limits for Total Arsenic, Total Mercury, Total Selenium, and Nitrate/nitrite as N were added to the permit (Outfall 004). • The water -quality based limits for Total Selenium were removed from the permit (Outfall 002) based on the results of Reasonable Potential Analysis. • Monitoring for Total Nickel was removed from the permit (Outfall 002) based on the results of Reasonable Potential Analysis. • Monitoring for Chlorides was removed from the permit (Outfall 002) based on the results of Reasonable Potential Analysis. • Monitoring for Total Zinc was removed from the permit (Outfall 002) based on the results of Reasonable Potential Analysis. • Monitoring for Total Zinc was removed from the permit (Outfall 004) based on the results of Reasonable Potential Analysis. • Monitoring for Total Arsenic was added to the permit (Outfall 004) due to the implementation of the TBEL limit for Total Arsenic. • Monitoring for Total Mercury was added to the permit (Outfall 004) due to the implementation of the TBEL limit for Total Mercury. • 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 State of North Carolina I Environmental Quality I Water Resources 1617 Mail service Center I Raleigh, North Carolina 27699-1611 919 707 9000 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. (Please see A. (31.)) For information on eDMR, registering for eDMR and obtaining an eDMR user account, please visit the following web page: http: / / deg.nc.gov/ about/ divisions /water -resources /edmr. For more information on EPA's final NPDES Electronic Reporting Rule, please visit the following web site: http: / /www2.epa.gov/ compliance/ final-national-pollutant-discharge-elimination- sys tem-npde s -electro nic-repo rting-rule. • The Applicable State Law Special Condition was added to the permit to meet the requirements of Senate Bill 729 (Coal Ash Management Act, Please see Special Condition A. (12.)). • The Additional Conditions and Definitions Special Condition was added to the permit. Please see Special Condition A. (10.). • Monitoring for Bromide was added to Outfall 002 and the Instream Monitoring Special Condition A. (29.) to address the comment from the Public Water Supply Section/DWR. • The monitoring frequency for the Whole Effluent Toxicity was increased to Monthly (Outfall 002) to address the EPA comment. • The monitoring frequency for the Total Arsenic, Total Selenium, and Total Mercury was increased to Weekly (Outfall 002) to address the EPA comment. • The IWC for the Whole Effluent Toxicity Test was changed based on the highest reported flow data. • Monitoring for Hardness was added to Outfall 002 and the Instream Monitoring Special Condition A. (29.) to address the EPA comment. Please provide any comments you have regarding the draft permit to this office by June 17, 2016. At this time, the Division is also publishing a notice in the newspapers of general circulation in Catawba County, inviting public comment on the draft permit. Following the 30 -day comment period, we will review all pertinent comments received and take appropriate action on the permit renewal. If you have any questions about the NPDES permit process, please contact me at the following e-mail address: sergei.chernikovL&ncdenr.gov, or telephone number: 919-807-6386. Sincerely, Sergei Chernikov, Ph.D. Environmental Engineer II Complex NPDES Permitting Unit cc: Central Files NPDES Files EPA Region IV Mooresville Regional Office / Water Quality (e -copy) Mooresville Regional Office / Public Water Supply Regional Engineer (e -copy) WSS/Aquatic Toxicology Unit (e -copy)