NCG200347_Email RE SW Monitoring for Southern Metals Company_20230306

Chandler, Jeffrey A
From:Schley, Michael <[e-mail]>
Sent:Monday, March 6, 2023 4:32 PM
To:[e-mail]
Cc:DeCristofaro, Andrew; Khan, Zahid; Chandler, Jeffrey A; Eplin, Jerry W; Farmer, Richard
L
Subject:\[External\] Stormwater Monitoring : Southern Metals Company - Response Required
Attachments:Cover Letter - Southern Metals - Response required.pdf; Southern Metals
SummaryTable of Results.pdf
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Subject: Stormwater Monitoring
Southern Metals Company

Dear Michael Helbein:

On January 17, 2023, Michael Schley of Charlotte-Mecklenburg Storm Water Services (CMSWS) sampled
stormwater runoff from the subject facility located at 2200 Donald Ross Road in Charlotte, North Carolina. The
monitoring was conducted under authority granted by Charlotte City Code Chapter 18, Section 18-82.

The monitoring was also conducted as part of a cooperative working agreement between Mecklenburg County
and the North Carolina Department of Environmental Quality (NCDEQ) – Division of Energy, Mineral and Land
Resources (DEMLR). NCDEQ – DEMLR has been copied on this report and made aware of monitoring results
regarding the facility’s NPDES permit.

Total rainfall during the rain event in which samples were collected at your facility was 0.20”. Rainfall data was
reported by the United States Geologic Survey (USGS) real-time station CRN-11 (Rain Gauge at Fire Station 10).
CMSWS sampled stormwater runoff from Outfall #001. A summary table of results is attached to this report.

Please see the attached table for more information on your monitoring results. CMSWS analyzed the monitoring
results from your facility by comparing them to Storm Water Permit benchmark parameters as well as to local
and state stream standards (CMSWS Action Levels and North Carolina Water Quality Standards). The results
indicate elevated levels of Total Suspended Solids (TSS), Copper, Zinc, Lead and COD in the facility’s
stormwater runoff. Since the stormwater sample was not collected from a stream, the local and state surface
water quality standards do not apply however, the results indicate the potential for polluted runoff from the
facility to negatively impact the receiving stream.

Based on this analysis, and under authority of the City of Charlotte Storm Water Pollution Control Ordinance,
CMSWS is requiring Southern Metals Company to evaluate current outdoor processes, material storage
practices and overall housekeeping at your facility. Within 30 days of receiving this letter, submit a written
response to CMSWS ([e-mail]) which includes both short-term and long-term actions to
be taken in an effort to reduce these elevated pollutant concentrations.

1

Please contact me at [phone] if you have any questions or need additional information. For questions
specifically regarding NPDES stormwater permitting, please contact Jeffery Chandler with NCDEQ – DEMLR
at [phone].

Sincerely,

Michael Schley
Environmental Specialist II
Charlotte-Mecklenburg Storm Water Services
[phone] | [e-mail] | StormWater.CharMeck.org

We are passionate about making our environment safe and healthy
by reducing flood losses and improving water quality for all

2

Charlotte -Mecklenburg
STORM
WATER
Services n
March 6, 2023
Southern Metals Company
Attn: Michael Helbein, Owner
2200 Donald Ross Road
Charlotte, NC 28208
Subject: Stormwater Monitoring
Southern Metals Company
Dear Michael Helbein:
StormWater.CharMeck.org
On January 17, 2023, Michael Schley of Charlotte -Mecklenburg Storm Water Services
(CMSWS) sampled stormwater runoff from the subject facility located at 2200 Donald Ross
Road in Charlotte, North Carolina. The monitoring was conducted under authority granted by
Charlotte City Code Chapter 18, Section 18-82.
The monitoring was also conducted as part of a cooperative working agreement between
Mecklenburg County and the North Carolina Department of Environmental Quality (NCDEQ) —
Division of Energy, Mineral and Land Resources (DEMLR). NCDEQ — DEMLR has been copied
on this report and made aware of monitoring results regarding the facility's NPDES permit.
Total rainfall during the rain event in which samples were collected at your facility was 0.20".
Rainfall data was reported by the United States Geologic Survey (USGS) real-time station CRN-
11 (Rain Gauge at Fire Station 10). CMSWS sampled stormwater runoff from Outfall #001. A
summary table of results is attached to this report.
Please see the attached table for more information on your monitoring results. CMSWS analyzed
the monitoring results from your facility by comparing them to Storm Water Permit benchmark
parameters as well as to local and state stream standards (CMSWS Action Levels and North
Carolina Water Quality Standards). The results indicate elevated levels of Total Suspended
Solids (TSS), Copper, Zinc, Lead and COD in the facility's stormwater runoff. Since the
stormwater sample was not collected from a stream, the local and state surface water quality
standards do not apply however, the results indicate the potential for polluted runoff from the
facility to negatively impact the receiving stream.
Based on this analysis, and under authority of the City of Charlotte Storm Water Pollution
Control Ordinance, CMSWS is requiring Southern Metals Company to evaluate current outdoor
processes, material storage practices and overall housekeeping at your facility. Within 30 days
dh
13 Clad Suttlotte, Avenue Charlotte.
East . Street
82
Charlotte, NC 28208 Charotte. NC 282i72
charlottenc.gov

Michael Helbein
March 6, 2023
Page 2
of receiving this letter, submit a written response to CMSWS (Michael. Schleygmecknc.gov)
which includes both short-term and long-term actions to be taken in an effort to reduce these
elevated pollutant concentrations.
Please contact me at [phone] if you have any questions or need additional information.
For questions specifically regarding NPDES stormwater permitting, please contact Jeffery
Chandler with NCDEQ — DEMLR at [phone].
Sincerely,
Michael Schley
Environmental Specialist II
Charlotte -Mecklenburg Storm Water Services
Attachment
cc: Andrew DeCristofaro, City of Charlotte
Jerry Eplin, NCDEQ - DEMLR
Zahid Khan, NCDEQ — DEMLR
Jeffrey Chandler, NCDEQ - DEMLR

Charlotte -Mecklenburg
STORM
WATER
Services
StormWater.CharMeck.org
Summary of Stormwater Monitoring and Analysis
Facility: Southern Metals (NCG200347)
Sample Date: 1/17/2023
Rain Event Total: 0.20" inches (CRN-11)
Industrial
Stormwater Permit
NC Water
Discharge
CMSWS
Quality
Parameter
Units
Outfall 001
Benchmarks/Limits
Action Level
Standard
(NCG200000
(In -stream)
(In -stream)
benchmarks/limits in
bold)
Temperature
(°C)
9.0
32
-
Dissolved
(mg/L)
10.2
-
4.0
Oxygen
Conductivity
(umho/cm)
337.8
550
-
pH
8.54
6.0-9.0
-
6.0 to 9.0
Fecal Coliform
100mL
NA
1000
3000
200
E-Coli Bacteria
1 mpn/
NA
-
-
-
Total Suspended
(mg/L)
442
100
-
-
Solids
Turbidity
(NTU)
1300
-
-
50.0
Copper*
(mg/L)
0.660
0.010
-
0.0036
Zinc*
(mg/L)
4.100
0.126
-
0.036
Chromium
(mg/L)
0.160
0.905
-
0.016
Lead*
(mg/L)
0.860
0.075
-
0.014
Oil and Grease,
(mg/1)
<0.005
15
-
-
and TPH
BOD
(mg/L)
23.1
-
6.0
-
COD
(mg/L)
260
120
-
-
Yellow indicates exceedance of Permit Benchmark Value or a CMSWS Action Level. NC Water Quality
In Stream Standards are also shown as a reference.
*Monitoring data collected during this event is based on total recoverable metals.
The values for the Industrial Stormwater Permits Discharge Benchmarks and CMSWS Action Levels are
also based on total recoverable metals. The NC Water Quality Standard for in -stream is based on dissolved
metals with an assumed in -stream hardness value of 25 mg/L.
•
o% To report pollution or drainage problems, call: 311
http://stormwater.charmeek.org y'
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