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HomeMy WebLinkAboutNC0025534_NOV-2019-LV-0690 Response_20191007BA BARAG.VOLK CITY OF HENDERSONVILLE JOHNF.CONNET Mayor The Cityof Four Seasons City Manager SIEVE CARAKER SAMUEL H. FRITSCHNER Mayor Pro Tern City Attorney PON STEPHENS WATER AND SEWER DEPARTMENT TAmMIE K. DRAKE JERRY A. SMITH,JR. City Clerk JEFF MILLER - Lee Smith, Utilities Director Mr. G Landon Davidson, P.G., Regional Supervisor qII Water Quality Regional Operations Section Asheville Regional Office Division of Water Resources, NCDEQ Water Quality Regional Operations Asheville Regional Office Subject: NOV-2019-LV-0690, Permit No. NCO025534 City of Hendersonville Wastewater Treatment Plant, Henderson County Dear Mr. Davidson, I am writing this letter in response to your letter (received September 26, 2019) concerning the Notice of Violation addressing the BOD and TSS exceeding the weekly limit from August 4, 2019 thru August 8, 2019. Starting on Thursday August 1" we noticed the sludge blanket in the North Clarifier was double that of the South Clarifier, and then on Friday August 2"d it continued to rise peaking at ten feet. So on Friday August 2"d we tried some operational controls such as flushing out the RAS pit In Case there was a clog to no avail. When the weekend operator came in on Saturday morning the sludge blanket was so thick that it was tripping the North Clarifier arm about every ten feet. 5o I had him turn off the flow to the North Clarifier and start wasting from the bottom of it, we continued this thru Monday August P. The weekend operators only work from 8 A.M. to 4 P.M. Sunday night we got two inches of rain in a short period of time. With having one operational clarifier and one operational sand filter (due to construction) we subsequently had more flow than the equipment could handle This caused the Sunday August 4th effluent sample to have a TSS of 400 mg/L and a BOD of 41.0 mg/L which caused us to exceed our weekly NPDES Permit Limits for TSS and BOD. We ended the week with an average effluent TSS of 81.0 mg/L and a BOD of 16.3 mg/L the weekly averages are 45.0 mg/L for TSS and 15.0 mg/L for the BOD. If you have any questions or need further clarification regarding this matter please do not hesitate to call me at (828) 697-3077 or via email at Rdemoss@hvinc.gov Sincerely, ow.MOC A /ibt9u— Garrett DeMoss, WWTP Facilities Manager Water & Sewer Department City of Hendersonville 305 Williams St. Ismith@hvinc.gov Phone: (828) 697-3073 Hendersonville, NC 28792.4461 www.hendersonvillenc.gov Fax: (828) 697-3089