NC0066028_202012VRR_20210331 (3)

DMR REVIEW RECORD
Winston-Salem Regional Office
Facility Name: Lansing WWTP Permit Number: NC0066028
Report Period: December 2020
Prior Assessments: 0 Enforcement Factor: 1.00
Waterbody
Outfall # Outfall Description Waterbody Name Classification
001 Effluent to Big Horse Creek Big Horse Creek (Horse Creek) C;HQW
Weekly Average Limit Violations
Sample Location: Outfall 001 - Effluent
Violation Unit of Limit Calculated % Over
Date Parameter
Frequency Measure Value Value Limit
Action
12/5/2020 BOD, 5-Day (20 Deg. C) -
Concentration
Weekly mg/I 45 54 20.0 Proceed with NOV
Other Violations/Staff Remarks:
Reviewed DMR against BIMS and can confirm this is an accurate violation. ORC Timothy Lynn Church stated in `Report
Comments': "A seasonal commercial discharger caused the wwtp to exceed the weekly BOD average for the first week of the
month. The monthly average was within limits. The Town continues to work with the user to mitigate this issue. The performance
of the wwtp has returned to normal during the month of January, 2021".
The monthly average was within permissible limits (Actual monthly avg: 23.2 mg/I / monthly avg limit: 30 mg/L). However, prior
12-month enforcement history shows BOD concentrations to be a repeated violation (see next page). Pattern reveals violations
seem to occur at the end of year (months of November and December) which correlates to Mr. Church's statement "a seasonal
commercial discharger".
This violation exceeds compliance limit by 20%, therefore I recommend proceeding with NOV.
Supervisor Remarks:
Jenny — NOV
Completed by: Tricia Lowery Date: 03/31/2021
Assistant Regional
Supervisor Sign -off: Jenny Date: 4/13/2021
Regional
Supervisor Sign -off: Date:

Prior 12-Month Enforcement History
Permit Number: NC0066028 Report Period: December 2020
Limit Violation
Sample Location: Outfall 001 - Effluent
Violation Report Violation
Date Period Parameter Type
NOD
NOV CPA
11/21/2020 11-2020 BOD, 5-Day (20 Deg. C) -
Concentration
Weekly Average
Exceeded
NOV-2021-LV-0097
11/28/2020 11-2020 BOD, 5-Day (20 Deg. C) -
Concentration
Weekly Average
Exceeded
NOV-2021-LV-0097
11/30/2020 11-2020 BOD, 5-Day (20 Deg. C) -
Concentration
Monthly Average
Exceeded
NOV-2021-LV-0097
12/7/2019 12-2019 BOD, 5-Day (20 Deg. C) -
Concentration
Weekly Average
Exceeded
NOV-2020-LV-0169
12/14/2019 12-2019 BOD, 5-Day (20 Deg. C) -
Concentration
Weekly Average
Exceeded
NOV-2020-LV-0169
12/14/2019 12-2019 Solids, Total Suspended -
Concentration
Weekly Average
Exceeded
NOV-2020-LV-0169
12/31/2019 12-2019 BOD, 5-Day (20 Deg. C) -
Concentration
Monthly Average
Exceeded
NOV-2020-LV-0169
4/11/2020 4-2020 BOD, 5-Day (20 Deg. C) -
Concentration
Weekly Average
Exceeded
NOD-2020-LV-0141