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Home My WebLink AboutNC0047384_DMR Review Record_20230627 DMR REVIEW RECORD WinstonSalem Regional Office Facility Name: T.Z. Osborne WWTP Permit Number: NC0047384 Report Period: January 2023 Prior Assessments: 2 Enforcement Factor: 1.00 ______________________________________________________________________________________________________________________________________________________________________ Waterbody Outfall # Outfall Description Waterbody Name Classification ______________________________________________________________________________________________________________________________________________________________________ 001 Effluent to South Buffalo Creek South Buffalo Creek WSV;NSW ______________________________________________________________________________________________________________________________________________________________________ Daily Limit Violations ______________________________________________________________________________________________________________________________________________________________________ Sample Location: Outfall 001 Effluent Violation Unit of Limit Calculated % Over Date Parameter Frequency Measure Value Value Limit Action ______________________________________________________________________________________________________________________________________________________________________ 1/5/2023 Chlorine, Total Residual 5 X week ug/l 17 26.30 54.7 No Action, BPJ ______________________________________________________________________________________________________________________________________________________________________ 1/9/2023 Chlorine, Total Residual 5 X week ug/l 17 48.20 183.5 No Action, BPJ ______________________________________________________________________________________________________________________________________________________________________ Monitoring Frequency Violations ______________________________________________________________________________________________________________________________________________________________________ Sample Location: Outfall 001 Influent Violation Unit of Date Parameter Frequency Measure Action ______________________________________________________________________________________________________________________________________________________________________ 1/21/2023 BOD, Carbonaceous 05 Day, 20 C 5 X week mg/l ______________________________________________________________________________________________________________________________________________________________________ 1/21/2023 Solids, Total Suspended Concentration 5 X week mg/l ______________________________________________________________________________________________________________________________________________________________________ Other Violations/Staff Remarks: DMR remarks: “Data Qualifications- Glucose/Glutamic Acid standard out of range on 1/6, 1/9, 1/17, 1/18; Blank depleted >0.20 mg/l on 1/23, 1/24, 1/25, 1/30; Effluent pH on 1/30, 1/31 run out of hold time-New chemist lab error. All QA/QC in range, pH normal value. No TZO Influent composite sample for 1/18 due to operations error. Thus, no influent values reported for CBOD, TSS, and Ammonia. eDMR revised because the monthly TN loading was not calculated correctly by the system. The eDMR calculated 43598 lbs and the actual was 43321 lbs.” This is a relatively old violation. Unsure why it didn’t show up on our reports till now. Most likely because it’s an influent violation. MAF: 35.804516MGD Recommend NOV. ______________________________________________________________________________________________________________________________________________________________________ Supervisor Remarks: Jenny – NOD NOD-2023-MV-0030 ______________________________________________________________________________________________________________________________________________________________________ Completed by: Ron Boone___________________________________ Date: 20230627__________________ Assistant Regional Supervisor Signoff: Jenny Graznak Date: 6/27/2023 Regional Supervisor Signoff: ___________________________________ Date: ____________________ Prior 12Month Enforcement History Permit Number: NC0047384 Report Period: January 2023 ____________________________________________________________________________________________________________________________________________________________________ Limit Violation ____________________________________________________________________________________________________________________________________________________________________ Sample Location: Violation Report Violation Date Period Parameter Type NOD NOV CPA ___________________________________________________________________________________________________________________________________________________________________ 4/5/2022 42022 1,4 dioxane Daily Maximum NOV2022LV0378 SP20220014 Exceeded Sample Location: Outfall 001 Effluent Violation Report Violation Date Period Parameter Type NOD NOV CPA ___________________________________________________________________________________________________________________________________________________________________ 5/7/2022 52022 BOD, Carbonaceous 05 Day, Weekly Average NOV2022LV0640 LV20220266 20 C Exceeded ___________________________________________________________________________________________________________________________________________________________________ 5/7/2022 52022 Nitrogen, Ammonia Total (as Weekly Average NOV2022LV0640 LV20220266 N) Concentration Exceeded ___________________________________________________________________________________________________________________________________________________________________ 5/14/2022 52022 Nitrogen, Ammonia Total (as Weekly Average NOV2022LV0640 LV20220266 N) Concentration Exceeded ___________________________________________________________________________________________________________________________________________________________________ 5/31/2022 52022 BOD, Carbonaceous 05 Day, Monthly Average NOV2022LV0640 LV20220266 20 C Exceeded ___________________________________________________________________________________________________________________________________________________________________ 5/31/2022 52022 Nitrogen, Ammonia Total (as Monthly Average NOV2022LV0640 LV20220266 N) Concentration Exceeded