NC0040011_NOI_NOV2021LV0698_&_NOV2021LM0085_Response_20211012

October 12'", 2021
TOWN OF YANCEYVILLE
INCORPORATED
"Tradition with Vision1986
NC Department of
Environmental Quality
Received
OCT 14 2021
Mr. Lon T. Snider, Regional Supervisor Winston-Salem .1
Water Quality Regional Operations Section
Winston-Salem Regional Office Regional Office
Division of Water Resources, NCDEQ
SUBJECT: NOTICE OF VIOLATION
TRACKING NUMBERS: NOV-2021-LV-0698 and NOV-2021-LM-0085
PERMIT NO. NCO040011
YANCEYVILLE WWTF
CASWELL COUNTY
Dear Mr. Snider:
This letter is in response to the Notices of Violation (NOV) dated September 291, 2021, issued to The
Town of Yanceyville concerning the permit limit exceedances that occurred in May and June 2021:
SAMPLE
PARAMETER
DATE
LIMIT
REPORTED
TYPE OF
VIOLATION
LOCATION
VALUE
VALUE
001 Effluent
Fecal Colifor n (CFU/100 ml)
5/1/2021
400
600
Weekly Geomean
Exceeded
001 Effluent
Fecal Colifonn (CFU/100 ml)
5/15/2021
400
600
Weekly Geomean
Exceeded
001 Effluent
Fecal Colifonn (CFU/100 ml)
5/22/2021
400
600
Weekly Geomean
Exceeded
001 Effluent
Fecal Coliform (CFU/100 ml)
5/31/2021
200
276.77
Monthly Geomean
Exceeded
SAMPLE
PARAMETER
DATE
MONITORING
TYPE OF
VIOLATION
LOCATION
FREQUENCY
001 Influent
BOD (mg/1) 5/15/2021
WEEKLY
FREQUENCY
VIOLATION
001 Influent
TSS (1119/1) 5/15/2021
WEEKLY
FREQUENCY
VIOLATION
SAMPLE
PARAMETER
DATE
LIMIT
REPORTED
TYPE OF
VIOLATION
LOCATION
VALUE
VALUE
001 Effluent
Fecal Coliforn (CFU/100 ml)
6/5/2021
400
600
Weekly Geomean
Exceeded
001 Effluent
Fecal Colifonn (CFU/100 ml)
6/12/2021
400
600
Weekly Geomean
Exceeded
The non-compliance for the Fecal Coliform is attributed to waste pump failures which interrupted the
operator's ability to balance the solids inventory by sending sludge to the aerobic digestor. These waste
158 E. Church Street • P.O. Box 727 • Yanceyville, North Carolina 27379
[phone] Fax [phone] www.yanceyvillenc.gov

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pumps were repaired and are currently removing solids from the SBR bioreactor during each process
cycle. The inability to waste during this period raised the blanket levels which caused the decanters to
pick up solids that collected in the chlorine contact chamber and increased chlorine demand.
The following corrective actions have been performed to remedy these non-compliance events:
1. Waste sludge pumps were repaired on August 3, 2021
2. Procedure implemented to drain and clean the chlorine contact chamber weekly
3. Consulted with the SBR manufacturer, Aqua Aerobics, on recommended settings for the cycling
times for the process. Training for all W WTF operations staff was completed on September 29-
30, 2021.
4. Contracted with Aqua. Aerobics for annual inspection and repair of key process elements (SBR
decanter, surface mixers and aerators, and actuators).
5. Working with Inframark technical: support staff to identify process control parameters for better
activated sludge treatment, reporting, sampling, testing, and capital improvement_ needs. This _
communication occurred with the .staff in August 2021.. Most of the recommended items were
already being implemented.
The frequency violation for the missed influent composite sample during the week of May 15th occurred
because tubing on the influent side of the autosampler suction pump had clogged, preventing the
autosampler from drawing enough influent for a composite sample. The W WTF operator has taken steps
to prevent the suction pump from clogging.
The Town of Yanceyville, in'partnership with Inframark, the firm contracted by the Town to operate and
maintain the wastewater treatment facility,acknowledges, and does not dispute the violations, however,
we request that NCDEQ'recognize the mitigating factors and underlying root causes that are not under the
control of the Town. Infiamark continues to work diligently to troubleshoot the treatment process and
improve the response and recovery time of activated sludge treatment.
JB�esstt �R�egga�r�ds,
� 14�1nuAcL ZafY
Kamara Barnett, Town Manager

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