NC0046809_DMR Review Record 01-2021_20210401 (2)

DMR REVIEW RECORD
Winston-Salem Regional Office
Facility Name: Cornerstone Conference and Resource Center WWTP Permit Number: NC0046809
Report Period: January 2021
Prior Assessments: 1 Enforcement Factor: 1.00
Waterbody
Outfall # Outfall Description Waterbody Name Classification
001 Effluent to UT Benaja Creek Benaja Creek WS-V;NSW
Daily Limit Violations
Sample Location: Outfall 001 - Effluent
Violation Unit of Limit Calculated % Over
Date Parameter Frequency Measure Value Value Limit
Action
1/7/2021 Chlorine, Total Residual
2 X week ug/I 28 46 64.3 No Action, BPJ
1/26/2021 Solids, Total Suspended -
Concentration
Weekly mg/I 45 58 28.9 Proceed to NOV
Other Violations/Staff Remarks:
Robert White (ORC) stated on Jan 2021 DMR, "TSS DAILY MAX EXCEED 1/26: We believe the TSS exceed occurred due to a
surge of flow from the air shutting off around the same time that samples were being pulled, which may have agitated any possible
buildup in the contact chamber. As a precautionary measure we will conduct increased sludge judging of the contact chamber".
Review of the DMR, it is confirmed the TSS value exceeded daily limit (see above). There are 4 violations concerning TSS
exceeding daily limit over past 12 months (see below), therefore I recommend proceeding with NOV.
Supervisor Remarks:
Jenny — NOV
Completed by: Tricia Lowery Date: 04/01/2021
Assistant Regional
Supervisor Sign -off: Jenny Date: 4/13/2021
Regional
Supervisor Sign -off: Date:

Prior 12-Month Enforcement History
Permit Number: NC0046809
Report Period: January 2021
Limit Violation
Sample Location:
Outfall 001 - Effluent
Violation Report
Date Period Parameter
Violation
Type
NOD
NOV
CPA
10/6/2020 10-2020
Solids, Total Suspended -
Concentration
Daily Maximum
Exceeded
NOD-2021-LV-0041
3/17/2020 3-2020
BOD, 5-Day (20 Deg. C) -
Concentration
Daily Maximum
Exceeded
NOV-2020-LM-0039 LM-2021-0010
3/17/2020 3-2020
Solids, Total Suspended -
Concentration
Daily Maximum
Exceeded
NOV-2020-LM-0039 LM-2021-0010
3/24/2020 3-2020
BOD, 5-Day (20 Deg. C) -
Concentration
Daily Maximum
Exceeded
NOV-2020-LM-0039 LM-2021-0010
3/24/2020 3-2020
Solids, Total Suspended -
Concentration
Daily Maximum
Exceeded
NOV-2020-LM-0039 LM-2021-0010
3/31/2020 3-2020
BOD, 5-Day (20 Deg. C) -
Concentration
Monthly Average
Exceeded
NOV-2020-LM-0039 LM-2021-0010
3/31/2020 3-2020
Solids, Total Suspended -
Concentration
Monthly Average
Exceeded
NOV-2020-LM-0039 LM-2021-0010
Monitoring Violation
Sample Location:
Outfall 001 - Effluent
Violation Report
Date Period Parameter
Violation
Type
NOD
NOV
CPA
2/29/2020 2-2020
Nitrogen, Ammonia Total (as Frequency Violation
N) - Concentration
NOV-2020-MV-0073
3/31/2020 3-2020
Nitrogen, Total - Concentration Frequency Violation
NOV-2020-LM-0039 LM-2021-0010
3/31/2020 3-2020
Phosphorus, Total (as P) -
Concentration
Frequency Violation
NOV-2020-LM-0039 LM-2021-0010
9/30/2020 9-2020
Nitrogen, Ammonia Total (as Frequency Violation
N) - Concentration
NOV-2021-MV-0001