NC0043532_Permit (Issuance)_20240423

DocuSign Envelope ID: 5E4A4458-D44C-44FC-A24B-8485801831E3
ROY COOPER
Giovernor
ELIZABETH S. BISER
5-rd-y
RICE ARD E_ ROOERS. JR.
D+rprror
NORTH CAROLINA
free MFUMrRMI QUI31fry
April 23, 2024
Mr. Duane Wingo, Utilities Director
Stanly County Utilities
1000 N. First Street, Suite 12
Albemarle, North Carolina 28001
SUBJECT: Authorization to Construct
A to C No. 043532A02
Stanly County
West Stanly WWTP
NPDES Permit No. NCO043532
Dear Mr. Wingo:
A letter of request for an Authorization to Construct was received February 23, 2024, by
the Division of Water Resources (Division). With additional information received on April 15,
2024, final plans and specifications for the subject project have been reviewed and found to be
satisfactory. Authorization is hereby granted for the construction of modifications to the existing
1.2 MGD, West Stanly WWTP, with discharge of treated wastewater into the Long Creek in the
Yadkin -Pee Dee River Basin.
This authorization results in an increase in design and permitted capacity to 2.5 MGD, and
is awarded for the construction of the following specific modifications:
• Relocation of the existing headworks, and addition of one (1) 25 GPM Seepex
progressive cavity grease pump
• Two (2) 1,500,000 gallons equalization (EQ) basins, and one EQ Pump Station
consisting of two (2) 2,500 GPM @ 43 TDH equalization basin submersible pumps.
(May be a deducted item).
• One (1) 25,000 gallons selector tank, one (1) 3 HP submersible mixer
• Two (2) 1,300,000 gallons Aeration tanks with swing tanks, three (3) 2,400 CFM rotary
screw, positive displacement blowers with VFDs, two (2) 15 HP submersible swing tank
mixers, two (2) 60 GPH @ 134 TDH caustic feed metering pump, one (1) 2.2 GPH @
150 TDH polymer feed metering pump.
• One (1) 463,000 gallon (75 ft diameter by 14 ft side depth) circular secondary clarifier,
three (3).
• 1,085 GPM @ 34 TDH Suction lift RAS pumps with VFDs, one (1) 625 @ 21 TDH
Suction lift WAS pump with VFD.
• Two (2) 810 SQFT tertiary rotary disc filters, two (2) 197 GPM @ 112 PSI backwash
disc filter pumps.
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DocuSign Envelope ID: 5E4A4458-D44C-44FC-A24B-8485801831E3
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April 23, 2024
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• Expansion of the existing chlorine contact chamber by construction of one (1) 23,632
gallons gas chlorination contact unit
• One (1) 5 HP floating mixer to existing digester, two (2) 20 HP floating aerators, two (2)
625 GPM @ 73 TDH submersible sludge transfer pumps with VFDs.
• Repurpose of the existing two (2) 600,000 gallons aeration basins for sludge digestion
and holding, two (2) 500 GPM @ 37 TDH submersible pumps, two (2) 10 HP floating
mixers.
• Repurpose of the existing one (1) 206,000 gallons clarifier for sludge digestion and
holding, one (1) 40 HP floating aerator.
• Construction of one (1) new Drain Pump Station consisting of two (2) 1,000 GPM @ 90
TDH submersible drain pumps.
• Construction of one (1) new Effluent Pump Station consisting of One (1) 1,500 GPM @
267 vertical turbine effluent pump with VFD and one (1) 100 GPM @ 482 TDH vertical
turbine non -potable reuse pump with VFD
• All necessary piping and controls (if applicable); in conformity with the project plans,
specifications, and other supporting documentation comprising the ATC Permit
Application package submitted to the Department of Environmental Quality.
This ATC is issued in accordance with Part III, Paragraph A of NPDES Permit No.
NC0043532 issued effective February 1, 2024, and shall be subject to revocation unless the
wastewater treatment facilities are constructed in accordance with the conditions and limitations
specified in Permit No. NC0043532.
It is the Owner's responsibility to ensure that the as -constructed project meets the
requirements of all applicable regulations and statutes, the ATC Permit Application package, and all
the requirements contained herein. Failure to comply may result in penalties in accordance with
North Carolina General Statute § 143-215.6A through § 143-215.6C.
The sludge generated from these treatment facilities must be disposed of in accordance with
G.S. 143-215.1 and in a manner approved by the Division.
In the event the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those as may be required
by the Division, such as the construction of additional or replacement wastewater treatment or
disposal facilities.
The Mooresville Regional Office, telephone number 704-235-2100, shall be notified at
least forty-eight (48) hours in advance of operation of the installed facilities so that an on -site
inspection can be made. Such notification to the regional supervisor shall be made during the
normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State
Holidays.
Upon completion of construction and prior to operation of this permitted facility, a
certification must be received from a Professional Engineer certifying that the permitted facility has
been installed in accordance with the NPDES Permit and the ATC Permit Application package.

DocuSign Envelope ID: 5E4A4458-D44C-44FC-A24B-8485801831E3
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April 23, 2024
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Mail the Certification to: Division of Water Resources, WQ Permitting — NPDES, 1617 Mail Service
Center, Raleigh, NC 27699-1617. The Engineer's Certification form is included with this submittal.
Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of the
wastewater treatment facilities. The operator must hold a certificate of the type and grade at least
equivalent to or greater than the classification assigned to the wastewater treatment facilities by the
Certification Commission.
The Permittee must also employ a certified back-up operator of the appropriate type and
grade to comply with the conditions of T 15A:8G.0202. The ORC of the facility must visit each Class
I facility at least weekly and each Class II, III and IV facility at least daily, excluding weekends and
holidays, must properly manage the facility, must document daily operation and maintenance of the
facility, and must comply with all other conditions of T 15A:8G.0202. All ORC site inspections must
be documented in a log to be on -site and available for review at all times.
A copy of the project plans and specifications shall be maintained on file by the
Permittee for the life of the facility.
During the construction of the proposed additions/modifications, the Permittee shall continue
to properly maintain and operate the existing wastewater treatment facilities at all times, and in such
a manner, as necessary to comply with the effluent limits specified in the NPDES Permit.
You are reminded that it is mandatory for the project to be constructed in accordance with
the North Carolina Sedimentation Pollution Control Act, and when applicable, the North Carolina
Dam Safety Act. In addition, the specifications must clearly state what the contractor's
responsibilities shall be in compliance with these Acts.
Prior to entering into any contract(s) for construction, the recipient must have obtained all
applicable permits from the State.
The issuance of this ATC does not preclude the Permittee from complying with any and all
statutes, rules, regulations, or ordinances which may be imposed by other government agencies
(local, state, and federal) which have jurisdiction.

DocuSign Envelope ID: 5E4A4458-D44C-44FC-A24B-8485801831E3
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April 23, 2024
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If you have any questions or need additional information, please contact Ori Tuvia at
telephone number [phone] or by email at [e-mail].
Sincerely,
DocuSigned by:
CE9CD2D3C45B4D4...
by Douglas Dowden
Environmental Programs Supervisor II
Industrial Permitting Unit
Division of Water Resources
cc: NPDES Files
Stanly County Health
e-copy: Cael Scharfe, PE, The Wooten Company.
Email: [e-mail].
DWR Mooresville. Regional Office, Water Quality Programs

DocuSign Envelope ID: 5E4A4458-D44C-44FC-A24B-8485801831E3
Stanly County Utilities
West Stanly WWTP
Authorization to Construct No. 043532A02
Issued April 23, 2024
NPDES Permit No. NC0043532
Engineer's Certification
❑ Final Engineering Certification / ❑ Partial Engineering Certification (mark all that apply)
I, , as a duly registered Professional Engineer in the
State of North Carolina, having been authorized to observe (periodically/weekly/full time) the
construction of the modifications and improvements to the West Stanly Wastewater Treatment Plant,
located in Stanly County, hereby state that, to the best of my abilities, due care and diligence was used
in the observation of the following construction of :
❑ Relocation of the existing headworks, and addition of one (1) 25 GPM Seepex progressive cavity grease
PUMP
❑ Two (2) 1,500,000 gallons equalization (EQ) basins, and one EQ Pump Station consisting of two (2)
2,500 GPM @ 43 TDH equalization basin submersible pumps. (May be a deducted item).
❑ One (1) 25,000 gallons selector tank, one (1) 3 HP submersible mixer
❑ Two (2) 1,300,000 gallons Aeration tanks with swing tanks, three (3) 2,400 CFM rotary screw, positive
displacement blowers with VFDs, two (2) 15 HP submersible swing tank mixers, two (2) 60 GPH @
134 TDH caustic feed metering pump, one (1) 2.2 GPH @ 150 TDH polymer feed metering pump.
❑ One (1) 463,000 gallon (75 ft diameter by 14 ft side depth) circular secondary clarifier, three (3).
❑ 1,085 GPM @ 34 TDH Suction lift RAS pumps with VFDs, one (1) 625 @ 21 TDH Suction lift WAS
pump with VFD.
❑ Two (2) 810 SQFT tertiary rotary disc filters, two (2) 197 GPM @ 112 PSI backwash disc filter pumps.
❑ Expansion of the existing chlorine contact chamber by construction of one (1) 23,632 gallons gas
chlorination contact unit
❑ One (1) 5 HP floating mixer to existing digester, two (2) 20 HP floating aerators, two (2) 625 GPM @ 73
TDH submersible sludge transfer pumps with VFDs.
❑ Repurpose of the existing two (2) 600,000 gallons aeration basins for sludge digestion and holding, two
(2) 500 GPM @ 37 TDH submersible pumps, two (2) 10 HP floating mixers.
❑ Repurpose of the existing one (1) 206,000 gallons clarifier for sludge digestion and holding, one (1) 40
HP floating aerator.
❑ Construction of one (1) new Drain Pump Station consisting of two (2) 1,000 GPM @ 90 TDH
submersible drain pumps.
❑ Construction of one (1) new Effluent Pump Station consisting of One (1) 1,500 GPM @ 267 vertical
turbine effluent pump with VFD and one (1) 100 GPM @ 482 TDH vertical turbine non -potable reuse
pump with VFD
❑ All necessary piping and controls (if applicable); in conformity with the project plans, specifications, and
other supporting documentation comprising the ATC Permit Application package submitted to the
Department of Environmental Quality.

DocuSign Envelope ID: 5E4A4458-D44C-44FC-A24B-8485801831E3
Mr. Dwane Wingo, Utilities Director
April 23, 2024
Page 6 of 6
I certify that the construction of the above referenced project was observed to be built within
substantia compliance, intent and in conformity with all applicable regulations and statutes and the
project plans, specifications, and other supporting documentation comprising the Authorization to
Construct Permit Application package.
Signature
Date
Mail this Certification to
Registration No.
Attn: Ori Tuvia
NPDES Industrial Permitting Unit
DEQ/DWR/Water Quality Programs
1617 Mail Service Center
Raleigh, NC 27699-1617
SEAL