NC0022900_Annual Performance_20220225

".41 Carolina Water Service
vim of North Carolina"
February 24, 2022
NC DEQ—Water Quality Permitting Section
Attention: Central Files R
512 N. Salisbury St. RECEIVED
Raleigh, North Carolina 27604
FEB 2 6.2022
2021 Annual Sewer Performance Reports NCDEQ/DWR/NPDES
Enclosed are the 2021 Annual Sewer Performance Reports for the Carolina Water Service Inc. of North
Carolina wastewater systems that are required to comply with North Carolina General Statute 143-215.1C.
System NPDES Permit Collection System Permit
Bradfield Farms NC0064734 WQCS00253
Carolina Trace NC0038831 WQCS00217
Connestee Falls NC0024295 WQCS00219
Fairfield Harbour NC0033111 WQCS00162
Sugar Mountain NC0022900 WQCS00174
If you have any questions or require additional information, please do not hesitate to contact me at (704) 318-
3317 or [e-mail].
Sincerely,
Brent Milliron
Regulatory Compliance Manager
Cc: Tony Konsul—Director of State Operations (West)
Dana Hill —Director of State Operations (East)

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Carolina Water Service
.11211/ of North Carolina"
Wastewater Treatment and Collection
Performance Annual Reports
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NPDES Permit: NC0022900
Collection Permit: WQCS00174
January 1, 2021 - December 31, 2021
P.O. Box 240908 Phone: [phone]
Charlotte, NC 28224 www.uiwater.com/north-carolina

I. General Information
Service Area:
All areas within Village of Sugar Mountain boundaries.
Applicable Permits:
Type NPDES Permit Number Area Manager Phone
Wastewater Treatment Facility NC0022900 Neil Reece 800-525-7990
Collection System WQCS00174 Neil Reece 800-525-7990
Description of Collection and Treatment Systems:
Operation and maintenance of the wastewater collection system consisting of, at the time of permit issuance,
approximately 5.6 miles of gravity sewer, approximately 2.0 miles of force main, and 9 duplex stations serving
1,091 customer connections.
The operation of a 0.50 million gallons per day (MGD) wastewater treatment plant consisting of an extended
aeration plant, one common equalization basin, three separate plants operating in parallel (1) 0.3 MGD plant
and (2) 0.1 MGD plants. Each plant consists of an aeration basin, clarifier, sludge holding tank, disinfection,
dechlorination equipment, and post aeration.
Treatment Process Flow Chart
Raw
Wastewater
-- ._ Disinfection
Equalization r Aeration —�
Basin / Basin Clarifier
hl Return Activated Sludge aeration
B&
Treated
�1 Sludge Disposal Dfsluenr
[] ' J Digester _. Discharge
1. Equalization Basin—Allows for a steady and consistent flow of wastewater into the aeration basin to maximize treatment.
2. Aeration Basin—Air is circulated,and bacteria removes dissolved solids,pollutants,Phosphorus and Nitrogen.
3. Clarifier—Solids are separated from the liquid and piped back to the aeration basins via the return activated sludge piping.
4. Disinfection—Effluent is disinfected by sodium hypochlorite to remove pathogenic organisms.
5. Dechlorination&Aeration—Removes residual chlorine and introduces oxygen before effluent is discharged into receiving stream.
6. Digestor—Treats the solids that are removed from the wastewater to allow safe and economical disposal.

Summary of Collection System Performance:
During 2021, we collected and treated over 71,470,000 gallons of wastewater. During that time period, there
was one (1) sanitary sewer overflow and three (3) NPDES Permit exceedances.
Key Performance:
• 3,500 linear feet of the sewer collection system pipe was cleaned in 2021. That is 11.4% of the total
collection system.
• There are 9 duplex Lift Stations serving the Village of Sugar Mountain Subdivision. Each lift station is
checked three times a week with maintenance conducted as needed as well as emergency generator
testing, wet well cleanings, and emergency/routine repairs being conducted periodically.
• All 9 duplex lift stations are continuously monitored using a telemetry missions' system that will notify
our staff of any issues 24/7.
• Annually each Lift Station is inspected using our 56 Point safety checklist.
• As part of our Asset Management Program, an Annual Maintenance Checklist is conducted to
determine that equipment is performing at peak efficiencies.
• Our staff throughout the year manually conducts manhole inspections, documents deterioration (if
any) due to corrosive atmospheric conditions. We recoated two (2) manholes in 2021 due to issues
found during these routine inspections.
• We have instituted an infiltration and inflow (I&I) program. The purpose of the I&I program is to keep
unwanted storm water from entering the collection system. Infiltration and inflow is a clear indicator
that there could be broken pipes, uncovered sewer laterals, or someone illegally connected to the
collection system.
• As a proactive measure, we educate our customers of our concerns of Fats, Oil, and Grease. Your help
in what is put down the drain greatly prevents clogs due to grease buildups and improves our overall
collection system. These grease buildups can result in SSO's.
• Our staff is continually monitoring and clearing rights of way (ROW's). These ROW's normally are in low
lying creeks and wooded areas. ROW's need to be cleared to ensure easy access during emergency
situations.
Summary of Wastewater Facility Performance:
It is our goal and standard at Carolina Water Service of North Carolina to meet 100% of our NPDES permit
discharge limits. We evaluate our treatment processes daily to ensure that goal is obtained. Our permit
requires us to continually monitor the effluent to determine if the treatment processes are working
effectively. This monitoring consists of sampling at various points in the treatment process. These samples
include: Flow measurement of how much wastewater enters and then is discharged from our plant,
Biochemical Oxygen Demand (BOD), Total Suspended Solids, Fecal Coliform, Total Ammonia, Total Residual
Chlorine,Temperature, Total Nitrogen, pH,Total Phosphorous, Dissolved Oxygen, and Chronic Toxicity.
Annually, we collect and analyze over 1,400 compliance samples and in 2021 we exceeded our NPDES permit
limits on three (3) occasions. This was mainly caused by a portion of our treatment plant undergoing an
emergency repair and therefore the plant was unable to run at full capacity. The single sanitary sewer

overflow was caused by a power outage at one of our lift station.This prohibited the wastewater to be
pumped through the collection system to the treatment plant for a short amount of time.
Our staff is committed to a standard of excellence by ensuring a safe and clean facility while maintaining
regulatory compliance. No known adverse effects have been noted on the environment or receiving streams.
II. 2021 Violation Summary
Biochemical Oxygen Demand daily limit was exceeded on 1/5/2021,
January 1/7/2021 and 1/20/21.
February No violations/deficiencies.
March No violations/deficiencies.
April No violations/deficiencies.
May No violations/deficiencies.
June No violations/deficiencies.
July No violations/deficiencies.
August Sanitary Sewer Overflow occurred on 8/17/2021.
September No violations/deficiencies.
October No violations/deficiencies.
November No violations/deficiencies.
December No violations/deficiencies.
III. Notification
Customers will be notified of the availability of this report with a message on their bills and copies will be
provided upon request.
IV. Certification
I hereby certify that the information contained in this report is accurate and complete to the best of my
knowledge.
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Signature:Tony / /
Name: Tony Konsul Title: Director, State Operations