NC0023884_Authorization to Construct_20190827

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ROY COOPER wd �,
Governor ?� 1
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MICHAEL S.REGAN 1-:
Secretary '\ r '0.1 R.a* , /
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LINDA CULPEPPER
Director NORTH CAROLINA
Environmental Quality
August 27, 2019
Mr. W. Lane Bailey
City Manager
Salisbury-Rowan Utilities
132 North Main Street
Salisbury,North Carolina 28144
SUBJECT: Authorization to Construct
A to C No. 023884A04
Salisbury-Rowan Utilities
Grants Creek WWTT
NPDES Permit No.NC0023884
Dear Mr. Bailey:
A letter of request for an Authorization to Construct was received on July 22, 2019,by the
Division of Water Resources (Division), and 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 7.5 MGD Grants Creek WWTT, with discharge of
treated wastewater into the Yadkin River in the Yadkin-Pee Dee River Basin.
This authorization results in no increase in design or permitted capacity and is awarded for
the construction of the following specific modifications:
Construction of new influent pump station consisting of four(4)new 5,560 GPM 200
HP submersible influent pumps with VFDs; installation of new headworks consisting
of two (2) new multi-rake mechanical bar screens each rated for 12 MGD at peak
hourly flow, one (1) new manual bar screen rated for 12 MGD at peak hourly flow,
and screenings washing and compacting equipment; installation of new grit removal
system consisting of two (2)new mechanically induced vortex grit removal units with
each unit rated for 12 MGD at peak hour flow, and two (2) new 250 GPM 15 HP
recessed impeller vortex grit pumps; conversion of two existing tricking filters to EQ
tanks, and installation of large bubble compressed air mixing systems; construction of
new RAS/WAS pump station, and installation of three (3) new 2,100 GPM 50 HP
submersible RAS pumps and two (2) 350 GPM 30 HP submersible WAS pumps;
construction of new side stream pump station consisting of two (2) new 750 GPM 20
HP pre-packaged duplex submersible pumps; construction of new flow meter vaults,
new EQ/RAS junction box, and new electrical building; installation of all required
piping and controls; in conformity with the project plans, specifications, and other
NORTH, E,RI CAROLINA
Department of FmlronmanHf Oualiry
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11611 Mail Service Center I Raleigh,North Carolina 27699-1611
919.707.3601

Mr.W. Lane Bailey, City Manager
August 27, 2019
Page 2 of 3
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.
NC0023884 issued effective December 1, 2014, and shall be subject to revocation unless the
wastewater treatment facilities are constructed in accordance with the conditions and limitations
specified in Permit No. NC0023884.
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 704-663-1699, 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.
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 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.
Page 2 of 3

Mr.W. Lane Bailey, City Manager
August 27, 2019
Page 3 of 3
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 complying 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 Min Xiao at
telephone number(919) 707-3644.
Sincerely,
� i�C ` v
.V"", Linda Culpepper
Director, Division of Water Resources
With Engineer's Certificate attached:
cc: DWR Mooresville Regional Office, Water Quality Programs
Central Files
ecopy: Laurin B. Kennedy, P.E.
CDM Smith
Email: [e-mail]
NPDES File
Without Engineer's Certificate attached:
cc: Rowan County Health
Page 3 of 3

Salisbury-Rowan Utilities
Grants Creek WWTT
Authorization to Construct No. 023884A04
Issued August 27, 2019
NPDES Permit No.NC0023884
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 Grants Creek WWTT, located in
Rowan County,hereby state that,to the best of my abilities, due care and diligence was used in
the observation of the following construction:
Construction of new influent pump station consisting of four (4) new 5,560 GPM
200 HP submersible influent pumps with VFDs; installation of new headworks
consisting of two(2)new multi-rake mechanical bar screens each rated for 12 MGD
at peak hourly flow, one (1) new manual bar screen rated for 12 MGD at peak
hourly flow, and screenings washing and compacting equipment; installation of
new grit removal system consisting of two (2) new mechanically induced vortex
grit removal units with each unit rated for 12 MGD at peak hour flow, and two (2)
new 250 GPM 15 HP recessed impeller vortex grit pumps; conversion of two
existing tricking filters to EQ tanks, and installation of large bubble compressed air
mixing systems; construction of new RAS/WAS pump station, and installation of
three (3) new 2,100 GPM 50 HP submersible RAS pumps and two (2) 350 GPM
30 HP submersible WAS pumps; construction of new side stream pump station
consisting of two (2) new 750 GPM 20 HP pre-packaged duplex submersible
pumps;construction of new flow meter vaults,new EQ/RAS junction box,and new
electrical building; installation of all required piping and controls; 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_ Registration No.
Date
Mail this Certification to: Attn: Min Xiao / SEAL
NPDES Complex Permitting Unit
DEQ/DWR/Water Quality Programs
1617 Mail Service Center
Raleigh,NC 27699-1617