NC0021156_MAYREV_20200722

Facility Name: Mount Holly WWTP
Report Period: May
DMR REVIEW RECORD
Mooresville Regional Office
Permit Number: NCO021156
Prior Assessments: 0 Enforcement Factor: 1.00
Waterbody
Outfall # Outfall Description Waterbody Name Classification
001 Effluent to the Catawba River CATAWBA RIVER (Lake Wylie below elevation 570) WS-IV;CA
Monthly Average Limit Violations
Sample Location: Outfall 001- Effluent
Violation Unit of Limit Calculated % Over
Date Parameter Frequency Measure Value Value Limit Action
5/31/2020 Solids, Total Suspended - 5 X week mg/I 30 33.30 11.1
Concentration
Weekly Average Limit Violations
Sample Location: Outfall 001 - Effluent
Violation Unit of Limit Calculated % Over
Date Parameter Frequency Measure Value Value Limit Action
5/2/2020 Solids, Total Suspended - 5 X week mg/I 45 46.00 2.3
Concentration
5/9/2020 Solids, Total Suspended - 5 X week mg/I 45 50.20 11.6
Concentration

Daily Limit Violations
Sample Location: Outfall 001- Effluent
Violation
Date Parameter
Frequency
Unit of
Measure
Limit
Value
Calculated
Value
% Over
Limit
Action
5/1/2020
Chlorine, Total Residual
5 X week
ug/I
28
39
39.3
No Action, BPJ
5/5/2020
Chlorine, Total Residual
5 X week
ug/I
28
40
42.9
No Action, BPJ
5/6/2020
Chlorine, Total Residual
5 X week
ug/I
28
34
21.4
No Action, BPJ
5/7/2020
Chlorine, Total Residual
5 X week
ug/I
28
41
46.4
No Action, BPJ
5/8/2020
Chlorine, Total Residual
5 X week
ug/I
28
36
28.6
No Action, BPJ
5/11/2020
Chlorine, Total Residual
5 X week
ug/I
28
31
10.7
No Action, BPJ
5/12/2020
Chlorine, Total Residual
5 X week
ug/I
28
45
60.7
No Action, BPJ
5/13/2020
Chlorine, Total Residual
5 X week
ug/I
28
47
67.9
No Action, BPJ
5/15/2020
Chlorine, Total Residual
5 X week
ug/I
28
34
21.4
No Action, BPJ
5/18/2020
Chlorine, Total Residual
5 X week
ug/I
28
47
67.9
No Action, BPJ
5/26/2020
Chlorine, Total Residual
5 X week
ug/I
28
46
64.3
No Action, BPJ
5/27/2020
Chlorine, Total Residual
5 X week
ug/I
28
38
35.7
No Action, BPJ
5/28/2020
Chlorine, Total Residual
5 X week
ug/I
28
40
42.9
No Action, BPJ
5/29/2020
Chlorine, Total Residual
5 X week
ug/I
28
47
67.9
No Action, BPJ
Other Violations/Staff Remarks:
Supervisor Remarks:
NOV
Completed by: Ori Tuvia Date:
Assistant Regional
Supervisor Sign -off: Date:
ocu igne y:
Regional E
Supervisor Sign -off: A14CC681AF27425... Date:
7/22/2020
7/22/2020

Prior 12-Month Enforcement History
Permit Number: NCO021156 Report Period: May
Limit Violation
Sample Location: Outfall 001 - Effluent
Violation Report Violation
Date Period Parameter Type NOD NOV CPA
6/10/2019 6-2019 Oxygen, Dissolved (DO) Daily Minimum Not NOD-2019-LV-0122
Reached