NC0021717_Authorization to Construct_20240530

DocuSign Envelope ID: D6D99C1E-5A95-49F2-AE82-5B2712C6880C
o,,tHt STATE
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ROY COOPER u o
Governor
ELIZABETH S.BISER
Secretary *`�`Q.
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
May 30, 2024
Mr. Kenneth Noland, Town Manager
Town of Wilkesboro
PO Box 1056
Wilkesboro,North Carolina 28697
SUBJECT: Authorization to Construct
A to C No. 021717A04
Town of Wilkesboro
Cub Creek WWTP
NPDES Permit N.NCO021717
DWI Project NO. SRP-W-0208
Dear Mr.Noland:
A letter of request for an Authorization to Construct was received enter date,by the Division of Water
Resources (Division). With additional information received on May 28, 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 4.9 MGD Cub Creek WWTP with
discharge of treated wastewater into the Yadkin River, in the Yadkin-Pee Dee River Basin.
This authorization results in an increase in design and permitted capacity to 8.0 MGD, and is awarded
for the construction of the following specific modifications:
• Three (3) influent submersible end-suction pumps,two (2) duty and one(1) standby, each
rated for 4,840 GPM @ 59.6 ft TDH with VFDs;
• Three (3)perforated plate mechanical bar screens each rated for 7 MGD at peak hourly flow;
• One(1) 70 ft3/hour washer compactor;
• One(1)250 GPM grit classifier;
• Conversion of existing aeration basin to one (1) 3.8 million gallon flow EQ basin;
• Repurposing Secondary Clarifier 4 as a 600,000-gallon Influent Buffer Tank and AGS pump
station wet well with addition of one (1)40 HP floating mixers and Three (3)Aerobic
Granular Sludge(AGS) influent submersible end-suction pumps,two (2) duty and one (1)
standby, each rated for 6,330 GPM @ 73 ft TDH with VFDs;
• Three (3) 1.29 million gallon AGS Sequencing Batch Reactors;
• Six(6)AGS hybrid rotary lobe blowers, five(5) duty and one(1) standby, each rated for
1,566 cftn(2,580 scfm);
• One(1) 149,400-gallon AGS Intermediate Tank;
• Repurposing of Secondary Clarifier 3 as a 490,000-gallon AGS Sludge Buffer Tank;
• Two (2)parallel UV light disinfection channels, each with three (3)banks, two (2) duty and
one(1) standby,with each bank consisting of 12 lamps and rated for 9.1 MGD at peak hourly
flow;
D EQNorth Carolina Department of Environmental Quality 1Division of Water Resources
512 North Salisbury Street 11611 Mail Service Center Raleigh,North Carolina 27699-1611
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919.707.9000

DocuSign Envelope ID: D6D99C1E-5A95-49F2-AE82-5B2712C6880C
Mr. Kenneth Noland, Town Manager
May 30,2024
Page 2 of 3
• Two (2)WAS submersible end-suction pumps, one (1) duty and one (1) standby, each rated
for 335 GPM @ 25 ft TDH;
• Two (2) floating digester decanter pumps, each rated for 210 GPM @ 8 ft TDH;
• Two (2) double disc digested sludge pumps, one (1) duty and one(1) standby, each rated for
120 GPM @ 126 ft TDH;
• Two (2)486 dry pound/hour sludge dewatering screw presses;
• 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. NC0021717
issued effective June 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. NC0021717.
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 Winston-Salem Regional Office, telephone number 336-776-9797, 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. 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 T15A:8G.0202. The ORC of the facility must visit each Class I facility

DocuSign Envelope ID: D6D99C1E-5A95-49F2-AE82-5B2712C6880C
Mr. Kenneth Noland, Town Manager
May 30,2024
Page 3 of 3
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 T15A: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.
If you have any questions or need additional information, please contact Nick Coco, PE at
telephone number 919-707-3609 or by email at [e-mail].
Sincerely,
AD.o'c'u,Siigne'd byy:A `1•�y In.''`
1VWk � C-1 h
C464531431644FE...
by Michael J. Montebello
NPDES Permitting Branch Chief
Division of Water Resources
cc: NPDES Files
Wilkes County Health
e-copy: C. Wes Bramlett, PE, HDR
Email: [e-mail]
DWR Winston-Salem Regional Office,Water Quality Programs
DWI/Ali Ajami

DocuSign Envelope ID:D6D99C1E-5A95-49F2-AE82-5B2712C6880C
Town of Wilkesboro
Cub Creek WWTP
Authorization to Construct No. 021717A04
Issued May 30, 2024
NPDES Permit No.NC0021717
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 Cub Creek Wastewater Treatment Plant, located in Wilkes County,
hereby state that,to the best of my abilities, due care and diligence was used in the observation of the following
construction of:
❑ (3)influent submersible end-suction pumps, two(2) duty and one(1) standby, each rated for 4,840 GPM @ 59.6
ft TDH with VFDs;
❑ Three(3)perforated plate mechanical bar screens each rated for 7 MGD at peak hourly flow;
❑ One(1)70 ft3/hour washer compactor;
❑ One(1)250 GPM grit classifier;
❑ Conversion of existing aeration basin to one(1) 3.8 million gallon flow EQ basin;
❑ Repurposing Secondary Clarifier 4 as a 600,000-gallon Influent Buffer Tank and AGS pump station wet well
with addition of one(1)40 HP floating mixers and Three (3)Aerobic Granular Sludge(AGS) influent
submersible end-suction pumps,two(2) duty and one (1) standby, each rated for 6,330 GPM @ 73 ft TDH with
VFDs;
❑ Three(3) 1.29 million gallon AGS Sequencing Batch Reactors;
❑ Six(6)AGS hybrid rotary lobe blowers, five(5)duty and one(1) standby, each rated for 1,566 cfm(2,580 scfm);
❑ One(1) 149,400-gallon AGS Intermediate Tank;
❑ Repurposing of Secondary Clarifier 3 as a 490,000-gallon AGS Sludge Buffer Tank;
❑ Two(2)parallel UV light disinfection channels, each with three (3)banks,two(2)duty and one(1) standby, with
each bank consisting of 12 lamps and rated for 9.1 MGD at peak hourly flow;
❑ Two(2)WAS submersible end-suction pumps, one(1) duty and one(1)standby, each rated for 335 GPM @ 25
ft TDH;
❑ Two(2) floating digester decanter pumps, each rated for 210 GPM @ 8 ft TDH;
❑ Two(2) double disc digested sludge pumps,one (1)duty and one (1) standby, each rated for 120 GPM @ 126 ft
TDH;
❑ Two(2)486 dry pound/hour sludge dewatering screw presses;
❑ 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.
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 Registration No.
Date
Mail this Certification to: Attn: Ori Tuvia
NPDES Industrial Permitting Unit
DEQ/DWR/Water Quality Programs SNAIL
1617 Mail Service Center
Raleigh,NC 27699-1617