NC0020737_NOV Response NOV-2018-LV-0631_20180829

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Certified Mail # 7017 2400 0001 0053 2950
August 29, 2018
W. Corey Basinger
Division of Water Resources, NCDEQ
610 East Center Ave., Suite 301
Moorseville, NC 28115
UP rTTV nip lCirm _C UnTTNTATM
P.O. BOX 429
Subject: Notice of Violation Response
Tracking Number: NOV-2018-LV-0631
Permit No. NCO020737
Dear Mr. Basinger,
KINGS MOUNTAIN, NORTH CAROLINA 28086 . 704-734-0333
RECEIVED/NCOENRIDWR
The City of Kings Mountain received NOV-2018-LV-0631 on 8/29/2018.
SEP 10 2018
WOROS
MOORESVILLE REGIONAL OFFICE
Issuance of the NOV was due to exceeding arsenic limits (daily max and monthly average). The City believes during the time of
these violations, the following occurred:
The City investigated all SIU's in order to determine the origin of the arsenic results found at our facility. During our
investigation, Cormetech (formally Steag SCR -Tech) produced the highest arsenic discharge. Cormetech's permitted limit for
arsenic is 2.2 lbs/day. The average release of arsenic from Coremetech, dating January -May 2018, equated to 809µg/L. These
results were received from Cormetech's IDMRs. During the City's sampling event on 04/18/2018, the arsenic level was 1,758
pg/L.
The City's Waste Water Treatment Plant has increased wasting and belt press operations in order to remove the amount of
metals in our process. The most recent effluent testing results (August 2018) revealed arsenic at 140 pg/L.
The City performed the second semi-annual sampling event for this year on 08/01/2018 at Cormetech. This sample revealed
arsenic levels in the amount of 14,000µg/L. The Pretreatment Department has determined that lowering the current arsenic
limit for Cormetech will assist in compliance with the City's NPDES permit. We have spoken with Cormetech and stressed the
importance of remaining compliant with their permit limits. We plan to sample their discharge more frequently to ensure they
meet the limits of their permit. A Notice of Violation has been sent to Cormetech for arsenic. Additional violations by
Cormetech will result in fines determined per the City's ERP.
Should you have any questions, please let me know.
Sincerely,
Ricky Duncan
City of Kings Mountain
Water Resource Director
The Historical City