NC0020737_NOV Reponse NOV-2018-LV-0791_20181203

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THE CITY OF KINGS MOUNTAIN
P.O. BOX 429 . KINGS MOUNTAIN, NORTIMI %b@kFjj6 734-0333
Certified Mail
November 28, 2018
W. Corey Basinger
DWR, NCDEQ
610 East Center Ave., Suite 301
Mooresville, NC 28115
Subject: Notice of Violation Response
Tracking Number: NOV-2018-LV-0791
Dear Mr. Basinger,
WQROs
MOORESVILLE REGIONAL OFFICE
Pilot Creek WWTP received the above mentioned NOV dated November 19, 2018 on November 27, 2018.
Violations for this notice were found exceeding ammonia nitrogen monthly average limit on September 30, 2018.
The following explains the cause of the non-compliance:
• On August 22°d of 2018, the MLSS in the #1 system begin to dramatically decrease to 1000mg/L. In order
for efficient treatment, the MLSS in this system should be between 4000 mg/L-6000mg/L. September
11th, 2018 the MLSS was analyzed and showed results of 224 mg/L. Operators immediately begin seeding
#1 system with #4 system. After seeding the system, #1 basin MLSS was showing 3900mg/L at the end of
October. All analyzed results have returned back to proper operating levels.
Remedial actions took place as soon as the POTW became aware of the situations. Due to immediate action, the
facility did not experience any other non-compliance from this event.
i believe the frequency of wasting was too 'nigh during the summer months, which resulted in the low MLSS
concentrations in the #1 system. In the future, we will increase the monitoring for MLSS from twice a week to five
times a week to ensure that we remain compliant with our permit and to more efficiently operate our WWTP.
If you need further information, or wish to discuss, please contact myself or Richelle Meek at 704-739-7131.
Sincerely,
Ricky Duncan
City of Kings Mountain
Water Resource Director
The Historical City