NCG200513_Monitoring Report_20200124

January 16, 2020
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CERTIFIED MAIL
RETURN RECEIPT REQUESTED
7018 3090 00013855 9649
Mr. James Moore
NCDEQ-Regional Office Engineer
NC Dept. of Energy, Minerals and Land Resources
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, NC 28115
RE: General Stormwater Permit Monthly Sampling Event (Nov. and Dec. 2019)
Certificate of Coverage No. NCG200513
Dear Mr. Moore:
With this submittal, the United Scrap Metal — Charlotte Facility (USM) is providing the above
referenced monthly sampling results. Monthly monitoring is required for copper and zinc for all
three outfalls. At a minimum, USM will sample all outfalls for both copper and zinc during the
month of January 2020 and will continue BMP efforts to reduce concentrations of copper and zinc
in stormwater runoff.
The December 2019 sampling event was the fourth consecutive month in which the
concentration of zinc in Outfall 002 exceeded the benchmark. Therefore, it is now subject to
Tier III requirements. Tiered activities are in process for all drainage areas at the site in an effort
to improve the quality of SW runoff. Activities being evaluated include Biochar Basic Filtration
media catch basin inserts and additional Filtiexx Envirosoxx installations upgradient from
stormwater outfalls.
Should you have any questions or comments, please do not hesitate to contact me at 804-621-
7000 or mobile phone [phone].
Sincerely,
UNITED SCRAP METAL, INC.
John Dergo
General Manager
Enclosures
cc: Adam Wilk— USMNational Compliance Manager
Tim Monroe — Leaf Environmental & Engineering, P. C.

Stormwater Quantitative Monitoring -Analytical Results
(NPDES General Permit COC NCG200513)
United Scrap Metal, Inc.
9925 Brookford Street, Charlotte, NC 28273
Permit Sample
Event Number
or Monthly
Sampling Event
(MSE)
Sampling Date
Total
Suspended
Solids
Chemical
Oxygen
Demand
Oil & Grease
Copper
Lead
N�
4a.
(mg/1)
(mg/1)
(mg/1)
(mg/1)
(mg/1)
(mg
3
6/15/2016
< 6.2
36.0
66
0.0131
< 0.0050
0.880
4
11 /29/2016
< 2.5
< 25.0
< 5.0
< 0.0050
< 0.0050
< 0.01
5
4/24/2017
6.6
< 25.0
< 5.0
0.0098
< 0.0050
0.122
6
12/6/2017
4.8
< 25.0
< 5.0
0.0093
< 0.0050
0,485
7
6/12/2018
20.3
< 25.0
< 5.0
0.0319
< 0.0050
<0.0050
1
4
0.103
MSE
MSE
7/16/2018
9/17/2018
ND
ND
0.581
0.0079
8
10/11/2018
5.0
MSE
11/24/2018
0.0071
< 0.0050
0.076
Outfall 001
MSE
12/14/2018
0.0087
< 0.0050
0.0889
MSE
1/24/2019
0.0061
<0.0050
0.457
9
6/18/2019
< 2.6
< 25.0
< 5.0
0.035
< 0.0050
0.516
MSE
Jul. 2019
No Sample
I
No Sample
MSE
Aug. 2019
NO FLOW
NO FLOW
MSE
Sep. 2019
NO FLOW
NO FLOW
10
10/16/2019
0.0158
0.434
MSE
Nov. 2019
NO FLOW
NO FLOW
MSE
12/13/2019
3.3
< 25.0
< 4.8
0.0114
< 0.0050
0.0838
3
6/15/2016
< 3.2
< 25.0
< 5.3
0.0120
< 0.0050
0.760
4
11 /29/2016
< 2.5
< 25.0
< 5.0
< 0.005
< 0.0050
< 0.01
5
4/24/2017
6.8
< 25.0
< 5.0
0.010
< 0.0050
0.130
6
12/6/2017
5.0
< 25.0
< 5.0
0.0116
< 0.0050
0.510
7
6/12/2018
11.5
< 25.0
NO
< 5.0
ND
0.0327
6
0
0.0071
< 0.0050
0.0176
<0.0050
1
1
0.116
MSE
7/16/2018
3.3
MSE
9/17/2018
8
10/11/2018
MSE
11/24/2018
0.0053
<0.0050
0.0482
Outfall 002
MSE
12/14/2018
0.0070
< 0.0050
0.0928
MSE
1/24/2019
0.0130
< 0.0050
0.493
9
6/18/2019
6.3
< 25.0
< 5.0
0.0340
< 0.0050
0.521
MSE
Jul. 2019
No Sample
No Sample
MSE
Aug. 2019
NO FLOW
NO FLOW
MSE
Sep. 2019
NO FLOW
NO FLOW
10
10/16/2019
0.0133
0.366
MSE
Nov. 2019
NO FLOW
NO FLOW
MSE
12/13/2019
10.2
< 25.0
< 4.8
�
< 0.0050
3
6/15/2016
< 2.6
< 25.0
< 5.3
0.0113
< 0.0050
0.708
4
11 /29/2016
< 2.5
< 25.0
< 5.0
< 0.005
< 0.0050
< 0.01
5
4/24/2017
4.2
< 25.0
< 5.0
0.014
< 0.0050
0.128
6
12/6/2017
5.3
< 25.0
< 5.0
0.0124 < 0.0050
0,W
7
6/12/2018
38.0
< 25.0
< 5.0
0 6 < 0.0050
1
MSE
7/16/2018
0.0132
0
MSE
9/17/2018
• •
1
8
MSE
10/11/2018
11/24/2018
9.5
35.9
NO
0.0 99
0.0065
1 -
0.0833
MSE
12/14/2018
0.0055
0.0836
Outfall003
MSE
1/24/2019
<0.0050
0.0082
0.0434
0.0700
MSE
2/19/2019
MSE
3/25/2019
< 0.0050
0.5470
MSE
April 2019
MSE
May 2019
• •
__
9
6/18/2019
< 2.7
< 25.0
< 5.0
< 0.0050
<0.0050
NO FLOW
0.6660
0.816_
NO FLOW
MSE
7/23/2019
MSE
Aug. 2019
MSE
Sep. 2019
NO FLOW
NO FLOW
10
10/16/2019
Nov. 2019
�
NO FLOW
NO FLOW
MSE
MSE
12/13/2019
4.9
< 25.0
< 4.8
�
< 0.0050
1
Benchmark
100
120
15
0.010
0.075
0.126
x.xxx
x.xxx
Mzl�requirements.
MSE = Monthly Sampling Event
Red text indicates benchmark exceedance triggering "Tier I" requirements.
Red text and yellow shading indicates two consecutive benchmark exceedances triggering "Tier II"
Red shading indicates four or more benchmark exceedances triggering 'Tier III' requirements,
which Includes NCDEMLR notification.

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