NC0023981_NOVNOI2021LV0012 Resp_20210119

-rvAe: CITY Or
�EpE THE HIGH CGUMiAy���j�,s,
��k CA�ov
City of Lenoir
Public Utilities
PO Box 985
Lenoir, NC 28645
January 14, 2021
Daniel Boss, Asst. Regional Supervisor
Water Quality Regional Operations Section
Asheville Regional Office
Division of Water Resources, NCDEQ
2090 US Highway 70
Swannanoa, NC 28778
Subject: NOTICE OF VIOLATION TRACKING: NOV-2021-LV-0012
Dear Mr. Boss:
Lower Creek Wastewater Treatment
Elisa Triplett, Superintendent
[e-mail]
[phone]
Quality Regional Operations
Asheville Regional Office
This letter is in response to the Notice of Violation letter dated January 6, 2021. Please allow
this letter to function as a response to address the issue.
On October 6t" one of the plant's two aeration basins was taken offline to make an air leak
repair. The other basin was kept online but with older airlines the ORC was worried about
turning up the air on the one basin for fear of rupturing those lines which would cause that
basin to be out of commission as well.
The basin was refilled and operational by October 9t". During those few days the ammonia
levels exceeded the permit limit of 6.0 mg/I for weekly and monthly permit limit of 2.0 mg/I as
well. With a weekly average result being 7.85 mg/I and the monthly average result being 2.91
The week following the incident show that the aeration basin being back online has resolved
the issues with ammonia levels exceeding the permit limits:
October 12- <0.5 mg/I

October 13- 0.67 mg/I
October 14 - <0.5 mg/I
October 15 - <0.5 mg/I
October 16 — 1.7 mg/I
Respectfully submitted,
Elisa Triplett