NC0025879_2022 SPAR_20231127

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Svstem Pertormonce Annuol Report
2022
General Informution:
Facility Name- Town Of Robbinsville Sewage System
6 Knight Street
Robbinsville, NC 28771
Town Of Robbinsville Wastewater Treatment Plant (WWTP)
197 Sandhole Road
Robbinsville NC,28771
o NPDES Permit #NC0025879
r Lime Stabilization Permit #WQ0039348
e Collection System Permit #WQCS00158
Descriptian Of Facilities
A. Collection System
The Town of Robbinsville service area covers approximately 17 miles. The Town provides service to
areas from Tallulah to Tapoco Road. The entire l7-mile system is gravity fed to the lift station at 6
Knight street. There are two Pump station's within the collection system and there is approximately
306 MH's system wide, The Torms collection system is considered fairly new. Most of the lines have
been replaced with ductile iron pipe (DIP)or polyvinyl chloride (PVC). There are very few terracotta
lines left within the system. Pipe size ranges from 4 inches to 8 inches. There are approximately 554
sewer customers.
B. Wastewater Treatment Plant (WWTP)
The present wastewater treatment plant (WWTP) is a .630 million gallons per day (MGD) Extended
aeration of secondary treatment plant serving the Town of Robbinsville and the county overall the
town services approximately 554 sewer customers. Ln2022 the facility treated an average daily flow of
292,637 gallons per day. The plant consists of a step-bar screen with a screw conveyor for preliminary
treatment. First and second stage aeration basins along with a circular clarifier for secondary
treatment. Disinfection is done by UV eflluent. Residuals are held in two 75,000 gallon aerobic
II.
Alderman Debbie Beasley 828- 73s-0498
Alderman Kenneth Hyde 828-735-9594
Alderman Vacant
Mayor Shaun Adams 828-73s-9382
Public Works Director Chadd Carpenter (ORC)
CS
828-73s-01 80
Wastewater Treatment
Plant Operator
Lamar Williams (ORC)
WWTP
828-735-0809
Public Works
C-surface water Operator
Eddie Sharpe ( BORC)
CS
828-73s-0085
Permit Numbers:
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U.
digesters until dewatering is completed by a .75 meter belt press. Dewatered sludge is then stabilized by
using alkaline stabilization and heat treatment process. The WWTP produced approximately 200 ton
ofdewatered sludge in 2022.
Performsnce measures
A. Collection svstem
r The Tovm ofRobbinsville preventative maintenance program consist ofhigh-pressurejetting
and visual inspection. This year 17;330 lineal feet of pipe was cleaned and inspected; this is
approximately 19.3o/o of the sewer system.
o Maintenance crew inspected system and aerial lines every rainfall. Inspected system twice
annually maintenance keeps a log of all sewer cleanings and aerials every time they are
cleaned and inspected.
o The collection system recorded I reportable sanitary sewer overflow (SSO) in 2022.
B. lYastewater treatment plant (WWTP)
o The wastewater treatment plant had no Notice of Violation (NOV) that exceeded the
permitted flow of the plant. The wastewater treatment plant (WWTP) continues to provide
effective/ efficient treatment services to the community averaging BOD and TSS removal
efficiencies well above the NCDENR and EPA requirements. Flow to the wastewater
treatment plant is below capacity for the plant with an average flow 292,637 gallons per day
in2022 Increased customers and well above average rainfall were major contributors to
increased flows. The wastewater treatment plant remained in compliance for all permitted
parameters.
Certilication
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 and customers ofthe Town of
Robbinsville sewer system.
1l- z1^tg
Chadd Carpenter, ORC
Public Works Director
Town of Robbinsville
Date
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