NC0036269_Authorization to Construct_20231117

DocuSign Envelope ID: 6EE1A90B-D017-429F-B90E-C946AC4CO3B1
ROY COOPER
Giovernor
ELIZABETH S. BISER
5-rd-y
RICE ARD E_ ROOERS. JR.
D+rprror
NORTH CAROLINA
free MFUMrRMI QUI31fry
November 17, 2023
Mr. Chad VonCannon, PE
Engineering Director
Water and Sewer Authority of Cabarrus County
232 Davidson Highway
Concord, North Carolina 28027
SUBJECT: Authorization to Construct
A to C No. 036269A06
Water and Sewer Authority of Cabarrus County
Rocky River Regional WWTP
NPDES Permit No. NCO036269
Dear Mr. VonCannon:
A letter of request for an Authorization to Construct (ATC) was received October 13, 2023,
by the Division of Water Resources (Division). With additional information received on November
9, 2023, 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
26.5 MGD Rocky River Regional WWTP, with discharge of treated wastewater into the Rocky River
in the Yadkin -Pee Dee River Basin.
This authorization results in an increase in design and permitted capacity to 34 MGD,
provided ATC No. 036269A03, ATC No. 036269A04 and ATC No. 036269A05 were also
completed, and is awarded for the construction of the following specific modifications:
Installation of two (2) 17,014 GPM @ 118.5 feet TDH dry -pit submersible main pump
Station pumps, two (2) 383 GPM @ 16.7 feet TDH self -priming, non -clog centrifugal headworks
pump, two (2) 300 GPM grit washer, one (1) 12 million gallons flow equalization basin, three (3)
train aeration basins each with two (2) 112,000 gallons anoxic zones and three (3) 299,000 gallons
aerobic zones, eighteen (18) 5 HP submersible anoxic zone mixers, four (4) 9,350 CFM high speed
blowers, one (1) 3,300 CFM existing BTF, one (1) 7,300 CFM hybrid BTF sixteen (16) 1,493 GPM
@ 25 feet TDH submersible RAS pumps, three (3) 21,400 GPM @ 25.4 feet TDH internal mixed
liquor recycle screw pumps, two (2) 16,700 GPM @ 23.4 feet TDH internal mixed liquor recycle
screw pumps, three (3) 500 GPM @ 105 feet TDH scum submersible pumps, two (2) 500 GPM
dissolved Air Flotation Thickeners, two (2) 25 GPM @ 104 feet TDH DAFT rotary lobe pumps,
two (2) 15 GPM @ 104 feet TDH dewatering progressing cavity pumps, two (2) 195 GPM @ 31
feet TDH plant drain submersible pumps, one (1) odor control building, and 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.
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DocuSign Envelope ID: 6EE1A90B-D017-429F-B90E-C946AC4CO3B1
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November 16, 2023
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[NOTE: This 34 MGD expansion (total capacity) of Rocky River WWTP consists of four
contracts. The Authorization to Construct permits are being issued, once for each contract.
All four final Engineer's Certification shall be submitted to the Division before the 34 MGD
facility may be operated.]
This ATC is issued in accordance with Part III, Paragraph A of NPDES Permit No.
NCO036269 issued effective November 1, 2021, and shall be subject to revocation unless the
wastewater treatment facilities are constructed in accordance with the conditions and limitations
specified in Permit No. NC0036269.
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
of 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 that 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 [phone], 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 at least weekly and each Class II, III and IV facility at least daily, excluding weekends

DocuSign Envelope ID: 6EE1A90B-D017-429F-B90E-C946AC4CO3B1
LYll. �11GL11 Y Vllli GL1111V11, 1 L, L11�1114 V1111� Lll VV�V1
November 16, 2023
Page 3 of 4
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 Ori Tuvia at
telephone number [phone] or by email at [e-mail].
Sincerely,
IV
DocuSigned by:
6+s 06W AV,
CE9CD2D3C45B4D4...
for Richard E. Rogers, Jr.
Director, Division of Water Resources
by Douglas Dowden
Supervisor, NPDES Industrial Permitting Unit
cc: NPDES Files
ecopy: George Anipsitakis, P.E.
Brown and Caldwell
Email: [e-mail]
DWR Mooresville Regional Office, Water Quality Programs
cc: Cabarrus County Health

DocuSign Envelope ID: 6EE1A90B-D017-429F-B90E-C946AC4CO3B1
Water and Sewer Authority of Cabarrus County
Rocky River WWTP
Authorization to Construct No. 036269A06
Issued November 17, 2023
NPDES Permit No. NC0036269
Engineer's Certification
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 Pembroke Wastewater Treatment
Plant, located in Cabarrus County, hereby state that, to the best of my abilities, due care and
diligence was used in the observation of the following construction:
Installation of two (2) 17,014 GPM @ 118.5 feet TDH dry -pit submersible main pump Station
pumps, two (2) 383 GPM @ 16.7 feet TDH self -priming, non -clog centrifugal headworks pump, two (2)
300 GPM grit washer, one (1) 12 million gallons flow equalization basin, three (3) train aeration basins
each with two (2) 112,000 gallons anoxic zones and three (3) 299,000 gallons aerobic zones, eighteen (18)
5 HP submersible anoxic zone mixers, four (4) 9,350 CFM high speed blowers, one (1) 3,300 CFM
existing BTF, one (1) 7,300 CFM hybrid BTF sixteen (16) 1,493 GPM @ 25 feet TDH submersible RAS
pumps, three (3) 21,400 GPM @ 25.4 feet TDH internal mixed liquor recycle screw pumps, two (2)
16,700 GPM @ 23.4 feet TDH internal mixed liquor recycle screw pumps, three (3) 500 GPM @ 105 feet
TDH scum submersible pumps, two (2) 500 GPM dissolved Air Flotation Thickeners, two (2) 25 GPM @
104 feet TDH DAFT rotary lobe pumps, two (2) 15 GPM @ 104 feet TDH dewatering progressing cavity
pumps, two (2) 195 GPM @ 31 feet TDH plant drain submersible pumps, one (1) odor control building,
and 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
substantial 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: Attn: Ori Tuvia
Registration No.
NPDES Industrial Permitting Unit
DEQ/DWR/Water Quality Programs
1617 Mail Service Center
Raleigh, NC 27699-1617