NC0021156_EDMR REVIEW NOVEMBER_20210112

DMR REVIEW RECORD
Mooresville Regional Office
Facility Name: Mount Holly WWTP
Permit Number: NCO021156
Report Period: November 2020
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
Daily Limit Violations
Sample Location: Outfall 001- Effluent
Violation
Unit of
Limit
Calculated
% Over
Date Parameter
Frequency
Measure
Value
Value
Limit
Action
11/6/2020 Chlorine, Total Residual
5 X week
ug/I
28
32
14.3
No Action, BPJ
11/9/2020 Chlorine, Total Residual
5 X week
ug/I
28
46
64.3
No Action, BPJ
11/10/2020 Chlorine, Total Residual
5 X week
ug/I
28
32
14.3
No Action, BPJ
11/12/2020 Chlorine, Total Residual
5 X week
ug/I
28
47
67.9
No Action, BPJ
11/13/2020 Chlorine, Total Residual
5 X week
ug/I
28
36
28.6
No Action, BPJ
11/16/2020 Chlorine, Total Residual
5 X week
ug/I
28
36
28.6
No Action, BPJ
11/17/2020 Chlorine, Total Residual
5 X week
ug/I
28
40
42.9
No Action, BPJ
11/25/2020 Chlorine, Total Residual
5 X week
ug/I
28
41
46.4
No Action, BPJ
11/12/2020 Oxygen, Dissolved (DO)
5 X week
mg/I
5
4.60
-8.0
11/13/2020 Oxygen, Dissolved (DO)
5 X week
mg/I
5
0.10
-98.4
Other Violations/Staff Remarks:
ORC indicated "out of compliance on DO because of the rain event that
passed
through that cause almost
3.5 inches of rain within
a 24hr period." BPJ recommended
Supervisor Remarks:
NOD
Completed by: Ori Tuvia
Date:
1/12/2021
Assistant Regional
Supervisor Sign -off:
Date:
DocuSigned by:
Regional
EA14CC681AF27425
1/12/2021
Supervisor Sign -off:
Date:

Prior 12-Month Enforcement Histor
Permit Number: NC0021156
Report Period: November 2020
Limit Violation
Sample Location:
Outfall 001 - Effluent
Violation Report
Violation
Date Period
Parameter
Type
NOD NOV CPA
5/2/2020 5-2020
Solids, Total Suspended -
Weekly Average
NOV-2020-LV-0559
Concentration
Exceeded
5/9/2020 5-2020
Solids, Total Suspended -
Weekly Average
NOV-2020-LV-0559
Concentration
Exceeded
5/31/2020 5-2020
Solids, Total Suspended -
Monthly Average
NOV-2020-LV-0559
Concentration
Exceeded