NCG030098_Notification of Elevated Levels_20211018

MANE
October 15, 2021
Mr. Corey Basinger
Environmental Regional Supervisor
Water Quality Regional Operations Section
Mooresville Regional Office
North Carolina Department of Environmental Quality
610 Easter Center Avenue, Suite 301
Mooresville, NC 28115
--✓ �—
Trane U.S., Inc.
4500 Morns Field Drive
I; 2021
[phone] 8208
FedEx Tracking Number: 9181 6200 6657
Re: Notification of Elevated Stormwater Benchmark Analytical Results
Trane U.S., Inc., 4500 Morris Field Drive, Charlotte, NC 28208
Stormwater Certificate of Coverage Number NCG030098
Dear Mr. Basinger:
Trane U.S., Inc. (Trane) owns and operates the HVAC equipment remanufacturing facility located at 4500 Morris Field
Drive, Charlotte, NC. Trane's stormwater aspects are authorized via Certificate of Coverage No. NCG030098 issued by
the NC Department of Environmental Quality (DEQ) under Stormwater Metal Fabrication General Permit Number
NCG030000 (Permit).
Per provisions under Part E of the Permit, this letter serves as Trane's written notification to DEQ that recent analytical
test results are elevated for Copper and Zinc. The following table summarizes the testing results.
Benchmark Parameter
Value
Sampling Date
Result
Total Recoverable 01119 0.010
July 8, 2021
0.032
Copper (Freshwater)
August 16, 2021
0.15
September 1, 2021
0.096
Total Recoverable 01094 0.126
1 August 16, 2021
0.24
Zinc (Freshwater)
I September 1, 2021
0.18
Following these recent sampling events, Trane completed site inspections to identify possible causes of the elevated
concentrations. Minor housekeeping items were noted and efforts are underway to fully corrected. No other root causes
were identified.
Trane has experienced an ongoing challenge with the Copper and Zinc benchmarks as communicated to DEQ in previous
monthly Discharge Monitoring Reports. Past investigative studies suggest rain falling on the Trane property contains
measurable concentrations of Copper/Zinc in some cases at or near the benchmark values. We recognize that other Trane
site factors may also contribute to the elevated stormwater concentrations.
If you have any questions related to this notification, please contact Ms. Carrie Nguyen, Trane Charlotte EHS Manager,
by telephone at [phone] or by email at [e-mail].
Kind regards,
Murthy Kohke
Business Process Leader
Trane — Charlotte Operations