NCG200517_COMPLETE FILE - HISTORICAL_20190624

STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
/V
DOC TYPE
'efHISTORICAL FILE
❑ MONITORING REPORTS
DOC DATE
p 2 o I � o � a
YYYYMMDD

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CATAWBA VALLEY
ENGINEERING & TESTING
PO Box 747
Hickory, NC 28603
308 15th St. SE
Suite 2
Hickory, NC 28602
828 578 9972 O
628 322 1901 F
NC Firm No. C-3833
SC Firm No, 5201
Geotechnical Engineering
Environmental Services
C MT/Specia I Inspections
June 18, 2019
Mr. James Moore
North Carolina Department of Environmental Quality
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, North Carolina 28115
[e-mail] JUN 2 4 2019
Re: Tier 3 Response - Storm Water Discharge Monitoring >':_"a!
Colt Recycling Southeast, LLC
816131Street, N.E.
Hickory, Catawba County, North Carolina
Project Number: 19-325
Dear Mr. Moore,
On behalf of Colt Recycling Southeast, LLC (Colt), Catawba Valley Engineering &
Testing, P.C. (CVET) is providing this Tier 3 Notification regarding the Colt facility
located at 816 131h Street, N.E, Hickory, North Carolina, The Colt facility is currently
permitted under North Carolina Division of Energy, Mineral, and Land Resources
(NCDEMLR) General Permit No. NCG200000 and Certificate of Coverage No.
NCG200517, issued on February 2, 2015 and expiring on December 31, 2019.
Based on laboratory analytical results for storm water outfall samples collected on
June 5, 2019, four cumulative benchmark exceedances have been detected for Total
Zinc at Outfall 003. Outfall locations are defined in the Storm Water Pollution
Prevention Plan (Excel Civil & Environmental Associates, PLLC, September 15, 2016).
Based on this exceedance, a Tier 3 Res.ponse has been triggered for Total Zinc at
Outfall 003.
Previously, a Source Assessment (SA) was performed at the facility and identified
potential source areas that may be contributing to the elevated metallic compound
concentrations observed across the site. CVET made recommendations regarding
the potential source areas and Colt is currently in the process of implementing these
changes in an effort to reduce stormwater discharge concentrations.
Sincerely,
CATAWBA VALLEY ENGINEERING AND TESTING, P.C.
Nathan S. Simmons, P.G.
Environmental Scientist