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HomeMy WebLinkAboutNC0088749_NOV-2020-LV-0598 AND NOV-2020-LM-0065 Response_20200911September 8, 2020 Lon T. Snider Regional Supervisor Water Quality Regional Operations Section Winston-Salem Regional Office Division of Water Resources, NCDEQ NC Department of Environmental Quality Received Via Certified Mail Return Receipt Requested RE: NOV Tracking Numbers NOV-2020-LV-0598 and NOV-2020- LM-0065 Lissara WWTP Permit No. NC0088749, Forsyth County, NC Dear Mr. Snider: SEP 11 2020 Winston-Salem Regional Office I am in receipt of your August 24, 2020 correspondence regarding the above -referenced Notices of Violation for the Lissara WWTP in Forsyth County, NC. As suggested in your letter, the permittee wishes to provide additional information for each of the Notices of Violation as follows: NOV-2020-LM-0065 The first quarter monitoring requirement for effluent Nitrogen and Phosphorus concentrations was overlooked due to a health -related issue with the Operator in Responsible Charge (ORC) at that time. Another ORC has now been assigned to the plant. Exceedence of BOD limits are believed to be related to improper disposal of certain solvents and paints into some residential waste systems. These disposals are thought to be occurring at residences that are occupied as well as under construction. The concern with solvents, paints and other harmful chemicals in the waste stream is that they are depleting the microbes and reducing the efficiency of the WWTP. The Homeowner's Association representative and builders with new homes under construction have been contacted and directed not to dispose of solvents, paints or other chemical products into the residential waste systems. Additionally, there is good reason to believe that an increase in use of bleaches and other disinfectants has been on the rise in residences due to the COVID pandemic. It is noted that higher exceedences of allowable BOD limits occurred about the time that the pandemic issue came to the forefront of public concern. (Mid -March). Several individual residential waste tanks as well as the tanks, piping and other aspects of the treatment plant itself have been cleaned more than once in an effort to control adverse impacts to the microbes in the plant treatment tanks. NOV-2020-LV 0598 Exceedence of BOD limits during the month of March 2020 are thought to be related to the same conditions as noted above. In order to look further into what may be causing BOD non- compliance issues, the ORC requested that VOC analysis #8260 be conducted on influent samples to validate suspicions that solvents and paints were continuing to be disposed of at certain residences. Toluene and p-isopropyl- toluene were detected in the samples which prompted additional instructions to the residents regarding proper waste disposal practices. The ORC is presently evaluating the option of adding additional microbes to the plant system. As a final comment, your reminder regarding verbal notification to the Regional Office of knowledge of any non-compliance issues related to the Lissara WWTP has been shared with the ORC. This permit condition will be addressed closely in the future. Please contact me with any further comments or questions. Very Truly Yours, Russ Willard (For C. J. Ramey) Lissara Partners LLC P.O. Box 10 Bethania, NC 27010 336.655.7339