NC0025879_2023 System Performance Annual Report_20240313

Svstem Pertormonce Anqual Report
General Information:
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
2023
T
II.
Permit Numbers:
r NPDES Permit #NC0025879
. Lime Stabilization Permit #WQ0039348
. Collection System Permit #WQCS00158
Descriotion Of Facilities
A. Collection Svstem
The Town of Robbinsville service area covers approximately 17 miles' The Town provides service to
areas from Tallulah to Tapoco Road. The entire iz-mile system is gravity fed to the lift station at 6
Knightstreet.ThereistwoPumpstationswithinthecollectionsystemandthereisapproximately306
MH's system wide. The Towns collection system is considered fairly new' Most of the Iines have been
replaced with ductile iron pipe (DIP)or potyvinyl chloride (PVC)'{here are very few terracotta lines
teft within the system- ripe size rang". i.otrl 4 inches to 8 inches. There are approximately 554 sewer
customers.
B. llastewater Treatment Plant filY.dP) r!
Thepresent,nu,t.,o,ffi)isa.630milliongalIonsperday(MGD)Extended
aeration of r..onOu.yi.eatme* plant serving the Town
-o-f
Robbins.ville and the county overall the
town services approximately 554 sewer custoirers' 1n2023 the facility treated an average daily flow of
293,500 gallons per day. The plant.orsistsoia step-bar screen with-a screw conveyor for preliminary
treatment. fi.rt anJsJconJ ,i"g. aeration basins along with a circular clarifier for secondary
treatment. Disinfection is done by UV effluent' Residuils are held in two 75'000 gallon aerobic
Alderman Debbie Beasley 828- 735-0498
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
828-73s-0809
Public Works
C-surface water Operator
Eddie Sharpe ( BORC)
CS
828-735-0085
il1.
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 122 ton
ofdewatered sludge in 2023.
Performance measures
A. Collection system
o The Town of Robbinsville preventative maintenance program consist of high-pressure jetting
and visual inspection. This year 14,775lineal feet ofpipe was cleaned and inspected; this is
approximately l67o of the sewer system.
r 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.
r The collection system recorded 0 reportable sanitary sewer overflow (SSO) in 2023.
B. Wsstewoter treatment plant (ryWTP)
o The wastewater treatment plant had one Notice of Violation (NOV) for temp, the downstream
effluent for the months ofAugust and September because they were not done, The ORC
didn't receive the new permit and didn't know the changes. Since then the issues have been
corrected and we are in compliance. 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 293,500 gallons per day
in2023. The wastewater treatment plant remained in compliance for all permitted
parameters.,
Certification
I certify under penalty oflaw that this report is complete and accurate to the best ofmy knowledge. I
further certify that this report has been made available to the users and customers ofthe Town of
Robbinsville sewer system.
'g -t ..2 ci
Chadd Carpenter,ORC
Public Works Director
Town of Robbinsville
Date