HomeMy WebLinkAboutNCG200521_MONITORING INFO_20190909A?11v
STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
/v bD a
DOC TYPE
❑ HISTORICAL FILE
MONITORING REPORTS
DOC DATE
❑ �� D A D
YYYYMMDD
September 3, 2019
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Keywell Metals
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RECF-IVED
SEP 0 9 2019
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Re: Storm Water Discharge Monitoring Report — Tiered Response Monitoring Event
Keywell Metals, L.L.C.
1035 Commercial Drive, Matthews, Union County, INC 28104
Certificate of Coverage Number NCG200521
Dear Sir/Madam:
Keywell Metals, L.L.C. (Keywell Metals) as referenced and in accordance with the National Pollution
Discharge Elimination System (NPDES) General Permit, is submitting two copies of our July 2019 Tiered
Response Discharge Monitoring Report (DMR).
Keywell Metals collected samples for the analysis of Total Suspended Solids, Copper and Zinc. The
laboratory analytical report indicated a concentration of copper exceeding the BMV and concentrations of
zinc and total suspended solids that were below their respective BMVs. This event represents the third
consecutive monitoring event in .which Zinc concentration was below the BMV and Keywell Metals will
therefore discontinue monthly sampling for this pollutant. Keywell Metals will continue to monitorTSS and
Cu monthly under the tiered response requirements upon the next qualifying storm event.
If you have any questions or concerns, please feel free to contact me at (704) 234-8614, or our
environmental consultant, Rob Duffy of Antea Group at (704) 324-7035.
Sincerely,
Dan Buwalda
Keywell Metals, L.L.C.
Director of Aerospace Operations
Attachment
Semi-annual Stormwater Discharge Monitoring Report (DMR)
for North Carolina DEMLR General Permit No. NCG200000 — Scrap Metal Recycling
Date submitted August 30.2019
CERTIFICATE OF COVERAGE NO. NCG20 0 5 2 1
FACILITYNAME Keywell Metals, LLC- Matthews
COUNTY Union
PERSON COLLECTING SAMPLES Tony Tyson
LABORATORY Prism Labs, Inc.
Lab Cent. II 402
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2019
SAMPLE PERIOD ❑ Jan -June ❑ July -Dec
or *Monthly' July (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
❑Zero -flow ❑Water Supply ❑SA
❑Saltwater QOtherRCsw
PLEASE REMEMBER TO SIGN ON THE REVERSE a
No discharge this period?2
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 rng/L or
50 mg/L4
120 mg/L
15 mg/L
0.010 mg/L or
0.005 mg/L5
0.075 mg/L or
0.210 mg/L'
0.126 mg/L or
0.090 mg/L5
OF001
7/23119
2.10 inches
70 mg/L
0.023 mg/L
0.064 mg/L
e,
J�
Monthly sampling (instead of semi-annual) must begRQi ffi(7� �hd consecutive benchmark exceedance for the same parameter at the same outfall.
For sampling periods with no discharge at any singleG'o't/}1t�fla11 y�l ust still submit this discharge monitoring report with a checkmark here-
3 The 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-
4 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 1 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.
n No discharge this nPrind7z
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
300 mg/L or 50 mg/L
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 2 or Tier 3 responses See General Permit
FOR PART A AND PART B MONITORING RESULTS:
• A SINGLE BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS.
• 2 EXCEE DANCES 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 MJ NO ❑
IF YES, HAVE YOU CONTACTED THE DEMUR REGIONAL OFFICE AS REQUIRED BY THE PERMIT? YES ❑ NO W
REGIONAL OFFICE CONTACT NAME:
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.
am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
9 i
(Date)
Permit Date: 02/02/2015-12/31/2019 SWU-256, last revised 1/28/2015
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