NCS000330_Relief From Monthly Monitoring_20200402

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
BRIAN WRENN
Acting Director
NORTH CAROLINA
Environmental Quality
April 2, 2020
Allegheny Technologies Inc.
Attention: Tyler Mercer, EHS Manager
2020 Ashcraft Avenue
Monroe, North Carolina 28111-5030
Subject: Relief from Monthly Monitoring
Stormwater Permit # NCS000330
Allegheny Technologies Inc.
Union County
Dear Mr. Mercer:
We are in receipt of your February 14, 2020 letter requesting relief from monthly
monitoring at the ATI Specialty Materials Monroe facility. Based on the March 31, 2020 site
inspection, the facility is in compliance with the tiered response actions and other
conditions of the NCS000330 Permit. Therefore, the Division is granting regulatory relief
from the Tier responses. Upon receipt of this letter, the subject facility may resume the
permit specified semi-annual analytical monitoring for the remainder of the current permit
term which expires on July 31, 2024. This decision applies only to the zinc benchmarks. A
benchmark exceedance of any other parameter listed in your permit will trigger the tiered
response actions as described in the general permit.
You must notify this office, in writing, within five business days if you become
aware of any other significant source of zinc at your facility that has the potential to be
exposed to stormwater. The relief granted in this letter is contingent upon the current
industrial practices at ATI Specialty Materials Monroe facility. Please retain and append
this letter to your Stormwater Pollution Prevention Plan (SPPP) or permit. If you have
any questions or comments concerning this letter, please contact me at 704-663-1699.
cc: Stormwater Laserfiche
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Sincerely,
Zahid S. Khan, CPM, CPESC, CPSWQ
Regional Engineer
Land Quality Section
North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Mooresville Regional Office 1 610 East Center Avenue. Suite 301 1 Mooresville. North Carolina 28115
704.663.1699

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