NC0073814_LM-2019-0092 Response_20200107

=IRPB SXems
Construction Services • Contract Operations • Maintenance
January 7, 2020
Mr. Landon Davidson
North Carolina Department of
Environmental Health and Natural Resources
Water Quality Section
2090 U.S. Highway 70
Swannanoa, NC 28778
Re: Notice of Violation/NOV-2019-LM-0092
NPDES Permit NCO073814 Buncombe County Schools
North Buncombe Elementary School
Buncombe County
Dear Mr. Davidson,
This letter is written on behalf of the Buncombe County Schools to provide information
as to remedial action taken to the above referenced facility. RPB Systems, Inc. is the
contract operations firm, which operates this facility.
As outlined in your November 25, 2019 letter attached, the treatment plant exceeded the
daily BOD limit of 45 mg/1 on 9/5/19 with a BOD 110 mg/L, which resulted in a monthly
average of 42.45 mg/L above the 30 mg/L limit. With any abnormal results or visual
observations we make air adjustments, waste sludge, and add soda ash to raise pH levels
as part of our work at the WWTP. We have had several BOD spikes due to unknown
source. We continue to collect extra samples and work with school board to see if any
cleaning chemicals are causing the issue. The missing Ammonia nitrogen sample not
sampled was due to operator error and is fault of RPB Systems.
I trust you will call if you have any further questions or concerns.
Robert Barr
P.O. Box 1325 Asheville, N.C. 28802
(828)-251-1900 (828)-251-1945