NCG200513_MONITORING REPORT_20200914

September 2, 2020
scrap
Metal Buyers and Recyclers
RECEIVED
SEP 14 2020
DENR-DEMLR
Moo and quality Section
resville Regional Office
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
70171000 00001900 2336
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 (August 2020)
Certificate of Coverage No. NCG200513
Dear Mr. Moore:
With this submittal, the United Scrap Metal — Charlotte Facility (USM) is providing the August
2020 monthly discharge monitoring report. An updated results table is also enclosed. USM
sampled copper and zinc at all outfalls during August 2020 (note that the storm event generating
the discharge, although measurable, resulted in only minor discharge volumes). All outfalls are
subject to tiered activities (see attached analytical table). Monthly monitoring of all parameters
is required at all outfalls, which United Scrap Metal intends to implement going forward.
Biochar filtration inserts have been installed in drop inlets prior to Outfalls 001 and 002 and
potentially need fresh materials. Additional EnviroSoxx filter "logs" installed at Outfalls 003
and 004 on April 15, 2020 have not yet produced the desired results. USM will continue Tiered
SW quality improvement efforts. A meeting with contractor(s) and consulting engineer(s) is
scheduled for September 8, 2020 to discuss additional measures to remove metals from SW
runoff through Outfalls 003 & 004.
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
ce: Adam Wilk— USMNational Compliance Manager
IN Monroe —Leaf Environmental & Engineering, P.C.

Semi-annual Stormwater Discharge Monitoring Report (DMR)
for North Carolina DEMLR General Permit No. NCG200000 — Scrap Metal Recycling
Date submitted 9- o a`F' aIt,
CERTIFICATE OF COVERAGE NO. NCG200513
FACILITY NAME United Scrap Metal, Inc.
COUNTY Mecklenburg
PERSON COLLECTING SAMPLES John Dergo
LABORATORY Pace Analytical Services, Inc. Lab Cert. #40 / #37712
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2020
SAMPLE PERIOD
or
X MonthW August (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
❑Zero -flow ❑water Supply ❑SA
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❑Saltwater ®Other C
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PLEASE REMEMBER TO SIGN ON THE REVERSE 4
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No discharge this period?Z
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches'
Total Suspended
Solids
Chemical Oxygen
Demand
Non -polar oil & grease
EPA Method 1664
(SGT-HEM)
Copper,
Total
Lead,
Total
Zinc,
Total
Benchmarks =_>
_
-
100 mg/L or
50 mg/O
120 mg/L
15 mg/L
0.010 mg/L or
0.005 mg/L'
0.075 mg/L or
0.210 mg/Ls
0.126 mg/L or
0.090 mg/L,
1
8/13/20
0.01
0.0231
0.250
2
8/13/20
0.01
0.0205
1
1 0.336
3
8/13/20
0.01
0.0145
0.485
4
8/13/20
0.01
0.0138
0.466
Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
'For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on -site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
See General Permit text, Table 3 or Table 4, identifying protected receiving water classifications where the more protective TSS benchmark applies.
5 Stormwater discharges into receiving waters classified as saltwater are subject to the second listed benchmark.
Note: Results must be reported in numerical format. For example, do not report Below Detection Limit, BDL, <PQL, Non -detect, ND, or other similar non -
numerical format. When results are below the applicable limits, they must be reported in the format, "<XX mg/L", where XX is the numerical value of the
detection limit, reporting limit, quantitation limit, etc. in mg/L.
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit.
Permit Date: 02/02/2015-12/31/2019 SWU-256, last revised 1/28/2015
Page 1 of 2

Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month.
❑ No discharge this period?'
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches'
Non -polar O&G by EPA
1664 (SGT-HEM)
Total Suspended Solids
Benchmarks ==>
_
-
15 mg/L
100 mg/L or 50 mg/L4
Footnotes from Part A also apply to this Part B
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier Z or Tier 3 responses. See General Permit.
FOR PART AND PART B MONITORING RESULTS:
• A SINGLE BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDANCES FOR THE SAME PARAMETER AT ANYONE OUTFALL? YES ® NO ❑
IF YES, HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE AS REQUIRED BY THE PERMIT? YES ® NO ❑
REGIONAL OFFICE CONTACT NAME: James Moore
Mail an original and one copy of this DMR, including all "No Discharge" reports, within 30 days of receipt of the lab results for at end of monitoring period
in the case of "No Discharge" reports) to:
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I
am aware that there are s;"ficant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
(Signature of
Permit Date: 02/02/2015-12/31/2019
A-sseAo
(Date)
PLEASE Sl
& DI
SWU-256, last revised 1/28/2015
Page 2 of 2