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Home My WebLink AboutNC0044024_Request for Additonal Information_20180302Water Resources ENVIRONMENTAL QUALITY March 2, 2018 CERTIFIED MAIL 7016 2140 0000 4371 1483 RETURN RECEIPT REQUESTED Mr. Michael Ferris, City Manager City of Albemarle PO Box 190 Albemarle, NC 28002-0190 Dear Mr. Ferris: ROY COOPER Gore, aoi MICHAEL S REGAN Sect etaly LINDA CULPEPPER Inlet un Dtrectoi Subject: Request for Additional Information NPDES Renewal Application Highway 52 WTP NPDES permit NCO044024 Stanly County The Division has reviewed your application, received on August 28, 2013, for renewal of NPDES permit NC0044024. To enable us to complete our review in accordance with N.C.G.S. 143-215.1 and 15A NCAC 2H .0 105, we need additional or revised information regarding your discharge: 1. Please provide five (5) days of Total Hardness (CaCO3 or [Ca + Mg]) data for the water treatment plant effluent and upstream from Outfall 001 to the unnamed tributary to Little Long Creek. The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by the NC Environmental Management Committee (EMC) on November 13, 2014. The US EPA subsequently approved the WQS revisions on April 6, 2016 with some exceptions. 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. As a result, the NPDES Permitting Unit will need site-specific effluent hardness data and instream hardness data, upstream of the discharge, for each facility monitoring these metals in order to calculate permit limitations. The metal of concern for the Highway 52 WTP permit is Total Copper. If no response is received within 60 calendar days [per 15A NCAC 211.0107(b)], the permit will be renewed without the benefit of the additional information. Therefore, a default hardness of 25 mg/L State of North Carolina I Environmental Quality I Water Resources 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 919 806 6300 Mr. Michael Ferris March 2, 2018 Page 2 of 2 (CaCO3 or [Ca + Mg]) will be used to calculate an effluent limit for Total Copper giving a daily maximum limit of 10.47 µg/L and a monthly maximum limit of 7.88 µg/L. 2. If possible, please provide a 7Q10 and 30Q2 at the location of Outfall 001, for the unnamed tributary to Little Long Creek [Stream Index: 13-17-31-1], a waterbody classified C, located within subbasin 03-07-13 [HUC: 0304010504] of the Yadkin Pee -Dee River Basin, contact the following staff member with the US Geological Survey: J. Curtis Weaver, Hydrologist, PE USGS North Carolina Water Science Center 3916 Sunset Ridge Road Raleigh, NC 27607 Phone: (919) 571-4043 // Fax: (919) 571-4041 E-mail address--jcweaverAusgs.gov Internet address -- http://nc.water.usgs.gov/ If you have any questions, please contact me at 919-807-6333 or via email at brianna.young@ncdenr.gov. Sincerely, Brianna Young Compliance and Expedited Permitting Unit cc NPDES Permit Files Central Files Mooresville Regional Office