CMSWS - Dart Acquisitions - Industrial Monitoring Report - 1-30-18

Charlotte -Mecklenburg
WATER
2145 Suttle Avenue
W1'1'111ER Charlotte, NC 28208
Services -
January 30, 2018
Scott Madix, Lab Manager
Dart Acquisitions
4132 Pompano Road
Charlotte, NC 28216
Subject: Stormwater Monitoring
Dart Acquisitions
Dear Mr. Madix:
On December 20, 2017, Chad Broadway and Matthew Storosh of Charlotte -Mecklenburg
Storm Water Services (CMSWS) sampled stormwater runoff from the subject facility
located at 4132 Pompano 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
0.84 inch. Rainfall data was reported by the United States Geologic Survey (USGS) real-
time station CRN -05 (Rain Gauge at Charlotte Water Administrative Building). CMSWS
sampled stormwater runoff from the discharge point of the facility's retention pond. A
summary table of results is attached to this report.
CMSWS analyzed the monitoring results from your facility by comparing them to local
and state stream standards (CMSWS Action Levels and North Carolina Water Quality
Standards). The results indicate elevated concentrations of copper and biochemical
oxygen demand (BOD) in your facility's storrawater runoff. Since the stormwater
sample was not collected from a stream, the local and state stream standards do not apply;
however, they indicate the potential of polluted runoff from the facility to negatively
impact the receiving stream.
Based on this analysis, CMSWS recommends that you conduct an evaluation of your
facility to identify potential sources of these pollutants. CMSWS also recommends
improving housekeeping, pollution prevention, and preventative maintenance measures in
order to minimize contamination in your facility's stormwater runoff.
ObTo report pollution or drainage problems call: 311
CHAR AI t"IT_ http://stormwater.charmeck.org I*.

Mr. Scott Madix, Lab Manager
Page 2
January 30, 2018
Please contact me at [phone] if you have any questions or need additional
information. For questions specifically regarding your NPDES stormwater permit, please
contact Mr. James Moore with NCDEQ — DEMLR at [phone].
Sincerely,
Chad Br y
Environmental Specialist
Charlotte -Mecklenburg Storm Water Services
Attachment
cc: Kristen O'Reilly, City of Charlotte
James Moore, NCDEQ — DEMLR
2

Charlotte -Mecklenburg
STORM 2145 Suttle Ave
WATERCharlotte, NC 28202
Services -"
Summary of Stormwater MonitorinLy and Analysis
Facility: Dart Acquisitions
Sample Date: December 20, 2017
Rain Event Total: 0.84 inch (CRN -05)
•
ObTo report pollution or drainage problems, call: 311
http://stormwater.charmeck.orc,
CHAR1jffl F;_ 0.
Industrial
NC Water
Stormwater
CMSWS
Quality
Parameter
Units
Outfall 001
Permit
Action Level
Standard
Discharge
(In -stream)
Benchmarks
(In -stream)
Temperature
(°C)
12.2
-
32
32
Dissolved
Oxygen
(mg/,)
10.05
-
-
4.0
Conductivity
(umho/cm)
54.3
-
550
-
pH
7.31
6.0 to 9.0
-
6.0 to 9.0
Fecal Coliform
181
1000
3000
200
100
E -Coli Bacteria
mpn/
520
-
-
-
1
Total Suspended
(mg/L)
51
100
-
-
Solids
Turbidity
(NTU)
60
-
-
50.0
Copper*
(mg/L)
0.016
0.010
-
0.0036
Zinc*
(mg/L)
< 0.010
0.126
-
0.036
Chromium
(mg/'-)
0.0076
0.05
-
0.016
Lead*
(mg/L)
< 0.005
0.075
-
0.014
Oil and Grease,
and TPH
(mg/)
< 5.0
15
-
-
BOD
(mg/L)
13.6
-
6.0
-
COD
(Mg/0
57
120
-
-
Yellow indicates exceedance of Permit Benchmark Value, CMSWS Action Level or NC Water Quality
Standard.
*Monitoring data collected during this event is based on total recoverable metals.
The values for the Industrial Stormwater Permits Discharge Benchmarks 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 m
•
ObTo report pollution or drainage problems, call: 311
http://stormwater.charmeck.orc,
CHAR1jffl F;_ 0.