NCG190110_2021 DMR_20211129 (2)

STORMWATER DISCHARGE OUTFALL (SDO)
ANNUAL SUMMARY DATA MONITORING REPORT (DMR)
Calendar Year 2021
General Permit No. NCG190000
Certificate of Coverage No. NCG190110
This monitoring report summary is due to the DWQ Regional Office no later than 30 days from the
date
The facility receives the laboratory sampling results from the final sample of the calendar year.
Facility Name: Atlantic Marine Sales, Inc.
County: New Hanover
Phone Number: [phone] Total No. of SDOs Monitored 1
Outfall No. 001
Is this outfall currently in Tier 2 (monitored monthly)?
Yes No
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes — No -x-
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency
Received approval from DWQ to reduce monitoring frequency
Outfall 001
Total
Rainfall,
inches
00530
00400
00556
01119
01104
01094
01114
TSS,
mg/L
pH,
SM.
Oil &
Grease,
mg/L
Copper,
mg/L
Aluminum,
mg/L
Zinc,
mg/L
Lead,
mg/L
Benchmark
NIA
100
6.0-9.0
15
0.005
0.75
0.095
0.220
Date Sample
Collected,
mo/dd/yr
06/14/2020
0.65
2.5
7.5
<5.0
0.041
0.083
0.051
<0.01
11/12/2020
0.71
<2.5
7.68
<5.0
0.037
0.035
0.088
<0.01
06/03/2021
0.67
8.2
6.2
<5.0
0.122
0.201
0.144
<0.01
11/21/2021
0.46
19.2
6.8
<5.0
0.133
0.143
0.085
<0.01
[Type text] [Type text] SWU-25ONCG10-092309

Additional Outfall Attachment
Outfall No. 002
Is this outfall currently in Tier 2 (monitored monthly)? Yes — No
-X-
Was this outfall ever in Tier 2 (monitored monthly)? Yes — No
-X-
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency
Received approval from DWQ to reduce monitoring frequency
Other Expenditure does not improve water quality X
Outfall 004
Total
Rainfall,
inches
00530
00400
00556
01119
01104
01094
01114
TSS,
mg/L
pH,
S.U.
Oil &
Grease,
mg/L
Copper,
mg/L
Aluminum,
mg/L
Zinc,
mg/L
Lead,
mg/L
Benchmark
NIA
100
6.0-9.0
15
0.005
0.75
0.095
0.220
Date Sample
Collected,
mo/dd/yr
06/03/2021
0.67
6.4
7.1
<5.0
0.033
0.094
0.060
<0.01
11/12/2021
0.46
6.8
7.0
<5.0
0.113
0.143
0.085
<0.01
[Type text] [Type text] SWU-25ONCG10-092309