NC0044440_Correspondence_20230111

RECEIVED/NCDEQ/DWR
JAN 11 2023
WOROS
MOORESVILLE REGIONAL OFFICE
2022
SYSTEM PERFORMANCE ANNUAL REPORT
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WASTEWATER TREATMENT PLANT
I. General Information
Facility Name:
Location:
Cherryville Wastewater Treatment Plant
736 Tot Dellinger Road
Cherryville, NC 28021 Gaston County
Responsible Entity: City of Cherryville, North Carolina
Person in Charge: Larry Wright, Wastewater Treatment Plant ORC / Plant Superintendent
[phone] [e-mail]
Backup ORC: Chris Heedick, Wastewater Treatment Plant Lab & Backup ORC
[phone] [e-mail]
Applicable Permits:
TREATMENT WORKS NC 0044440 Expires 07/31/2026
LAB CERTIFICATION # 5619 Expires 12/31/2023
STORMWATER PERMIT# NCG110135 Expires 05/31/2023
LAND APPLICATION PERMIT# WQ0000430 Expires 08/31/2026

Description of Treatment Process:
This facility is located on Tot Dellinger Road just outside the city limits. The Plant is an
activated sludge plant designed to treat 2.0 MGD - million gallons per day. The facility
consist of a bar screen, grit removal, dual oxidation ditches, dual secondary clarifiers, chlorine
disinfection and de -chlorination system, flow measurement, cascade aeration, aerated sludge
holding tank, sludge storage lagoon, and sludge drying beds which are no longer in use.
Currently we are only running half of the plant due to the low flow. This Facility discharges
into the Indian Creek, which is classified C water in the Catawba River Basin.
II. Performance
Summary of System Performance for calendar year 2021:
This Facility is well maintained and in good operational condition. Effluent from the
secondary clarifiers is of high quality with few suspended solids. The mixed liquor in the
aeration basin are mixed well and is maintained at a sufficient dissolved oxygen level for the
biological process to operate properly. The mixed liquor in the secondary clarifiers exhibits
Good settling characteristics. We drip feed 50% Caustic to maintain alkalinity when needed.
Records concerning instrument calibration and process control are being maintained in
accordance with NPDES Permit requirements.
The discharge monitoring reports (DMRs), chain -of -custody forms, and laboratory analyses
form are readily available for review in the facility's office. All records are complete and up-
to-date.
Overall, for the previous twelve (12) months this facility has performed well.
The Wastewater Plant is running smoothly and everything is in good working order.
We passed all of our quarterly toxicity testing and was within our permit limits on our
monthly DMR reports. We only received one Notice of Violation — NOV-2022-MV-0168.
The Notice of Violation was during the month of October 2022, we forgot to sample for our
monthly Total Nitrogen and Phosphorus sample. No fines have been issued and we responded
with a letter to NCDENR of correction action to assure this does not happen again.
2

We are currently in the process of renovating one of our oxidation ditches.
The screenings from both the bar screen and grit removal system are contracted by Berry's
Container Service LLC. The screenings are hauled to the Gaston County landfill.
Our land application is contracted by Synagro Central, LLC. We contact our Analytical and
Toxocity testing out to Meritech Lab, Inc. in Reidsville, NC.
The City of Cherryville is currently in the process of updating some of its sewer lines and the
water lines were updated as part of the approved 9.5 million dollar bond.
FLOW MEASUREMENT:
The effluent flow are being measured using an ultrasonic flow meter with a totalizer. Carolina
Technical Services, Inc. of China Grove, North Carolina calibrates the flow meter quarterly.
The contracted company (performing the meter calibration) should document a comparison of
an instantaneous flow measurement to the flow meter's recorded flow rate to verify that the
flow meter's accuracy is within 10% of the actual discharge.
A full and complete copy of The City of Cherryville Wastewater Treatment Plant's
"Performance Annual Report" will be posted on a prominent Bulletin Board located at the
City Hall of Cherryville and the Wastewater Treatment Plant.
Certification
I certify under penalty of law that this report is complete and accurate to the best of my
knowledge. I further certify that this report has been made available to the users or customers
of the named system and that those users have been notified of its availability.
Larryl Wright
ORC / Plant Superintendent
City of Cherryville, N.C.
CC: Brian Dalton, City Manager
Date
3

Collection System Performance Annual Report
2022
I. General Information
Facility Name: City of Cherryville
Responsible Entity: City of Cherryville
Person in Charge/Contact: Kevin Abernathy ORC
Description of Collection System:
The City of Cherryville has around 2500 customers who are mostly residential with light
commercial and a few Industrial customers. We maintain around 25 miles of gravity
sewer line along with about 10 miles of pressure main and 10 pumping stations.
II. Performance
Summary of system performance for 2021 fiscal year
The City of Cherryville system is in good shape with very few SSO's. We do have some
areas that are susceptible to heavy rain and other areas that may have an I/I problem we
are still looking to find. These areas result in few overflows.
January
None
February
1 I th 125 Fish Camp Rd. — 400 gal
March
None
April
None
May
None
June
None
July
None

August
None
September
None
October
None
November
None
December
None
III. Notification
This report will be available to the public at their request.
IV. Certification
I certify under penalty of law that this report is complete and accurate to the best of my
knowledge. I further certify that this report has been made available to the customers of
City of Cherryville and that those users have been notified of its availability.
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Kevin Abernathy - Date
Water and Sewer Supervisor
City of Cherryville