NC0088722_Correspondence_20211115

Department of Public Works
Killian Creek WWTP
Dear Mr, Tuvia
The Killian Creek WWTP NC0088722 Received a notice of violation NOV-2021-LV-0849 for exceeding limits on
Nitrogen, Ammonia Total (as N) during week three.
We have been without one of our blowers (blower # 3) because it is being rebuilt. Sometime in early
September the belts broke on Blower #4 the operators assumed the blower was running correctly since the
motor was running, they didn't realize the belts were broken until our DO was low. When I looked back on the
trend chart we had low DO for several days. Once we figured out that the belts were off the motor causing the
blower not to run, we fixed the problem and our DO went back to normal,
Since we have four blowers total and we had two out of service that caused our DO to drop, causing the
Wastewater not to go through the nitrogen cycle. Causing us to be out of limits for that week, once the DO
was corrected the NH3-N went back to normal within days.
To prevent this from happening again all of the operators were trained on how to tell if the motors and the
blowers are running. The operators were also shown where to looks to see if the belts are on correctly.
i: del-,..-.-----,-- on S Lload
James T. Simmons
0 0. 704-748-2314 0 tsimmons©Iincolncounty.org 7085 Old Plank Road,
f. 704-735-0163 0 Stanley, NC. 28164