NC0055786_202208VRR_20221024

DMR REVIEW RECORD
Winston-Salem Regional Office
Facility Name: Lexington Regional WWTP Permit Number: NC0055786
Report Period: August 2022
Prior Assessments: 0 Enforcement Factor: 1.00
Waterbody
Outfall # Outfall Description Waterbody Name Classification
001 Effluent to Abbotts Creek Abbotts Creek Arm of High Rock Lake WS-V,B
Monthly Average Limit Violations
Sample Location: Outfall 001 - Effluent
Violation Unit of Limit Calculated % Over
Date Parameter Frequency Measure Value Value Limit
Action
8/31/2022 Nitrogen, Ammonia Total (as N) - 5 X week mg/I 1 1.34 34
Concentration
Other Violations/Staff Remarks:
Davidson County
MAF: 2.2 MGD
Checked "Non -Compliant"
eDMR Comments: "While doing dredging maintenance in the two ponds ammonia was released. We run ammonia as a grab at
#6 MH every day just ahead of the ponds and they are all <1 mg/I."
Pertinent recent permit limit exceedances:
4/2022 monthly average NH3-N 6% over limit
5/28/2022 weekly average NH3-N 4.3% over limit
5/2022 monthly average NH3-N 56% over limit
Recommend NOV
Supervisor Remarks: Jenny — NOV
Completed by: Jesse Barnes Date: 10/24/2022
Assistant Regional
Supervisor Sign -off: JG Date: 10/26
Regional
Supervisor Sign -off: Date:

Prior 12-Month Enforcement History
Permit Number: NC0055786
Report Period: August 2022
Limit Violation
Sample Location: Outfall 001 - Effluent
Violation Report
Date Period Parameter
Violation
Type
NOD
NOV
CPA
3/19/2022 3-2022 BOD, 5-Day (20 Deg. C) -
Concentration
Weekly Average
Exceeded
NOD-2022-LV-0111
3/31/2022 3-2022 BOD, 5-Day (20 Deg. C) -
Concentration
Monthly Average NOD-2022-LV-0111
Exceeded
4/30/2022 4-2022 BOD, 5-Day (20 Deg. C) -
Concentration
Monthly Average
Exceeded
NOV-2022-LV-0472
4/30/2022 4-2022
Nitrogen, Ammonia Total (as Monthly Average
N) - Concentration Exceeded
NOV-2022-LV-0472
5/28/2022 5-2022 BOD, 5-Day (20 Deg. C) -
Concentration
Weekly Average
Exceeded
NOV-2022-LV-0471
5/28/2022 5-2022
Nitrogen, Ammonia Total (as Weekly Average
N) - Concentration Exceeded
NOV-2022-LV-0471
5/31/2022 5-2022 BOD, 5-Day (20 Deg. C) -
Concentration
Monthly Average
Exceeded
NOV-2022-LV-0471
5/31/2022 5-2022
Nitrogen, Ammonia Total (as Monthly Average
N) - Concentration Exceeded
NOV-2022-LV-0471
6/30/2022 6-2022 BOD, 5-Day (20 Deg. C) -
Monthly Average NOD-2022-LV-0112
Concentration Exceeded