NC0024970_Authorization to Construct_20230227

DocuSign Envelope ID: 76D83CDA-BB6C-4E84-86E3-3F474179FA2F
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Angela D. Charles, Director of Utilities
Charlotte Water
4322 Westmont Drive
Charlotte, NC 28217
Dear Ms. Charles:
NORTH CAROLINA
Environmental Quality
February 27, 2023
SUBJECT: Authorization to Construct
A to C No. 024970A15
Charlotte Water
McAlpine Creek Wastewater Management
Facility
NPDES Permit No. NC0024970
A letter of request for an Authorization to Construct was received November 9, 2022, by
the Division of Water Resources (Division). With additional information received February 23,
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 modification to the existing
64 MGD McAlpine Creek Wastewater Management Facility, with discharge of treated
wastewater into McAlpine Creek of the Catawba River Basin.
This authorization results in no increase in design or permitted capacity and is awarded
for the construction of the following specific modifications:
Installation of two (2) 4,185 GPM horizontal dry -pit submersible Return Activated
Sludge (RAS) pumps in the RAS Pump Station No. 3, automatically power actuated gates at the
South Aeration Tank Splitter Box, and all necessary 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.
This ATC is issued in accordance with Part III, Paragraph A of NPDES Permit No.
NC0024970 issued effective October 1, 2017 and shall be subject to revocation unless the
wastewater treatment facilities are constructed in accordance with the conditions and limitations
specified in Permit No. NC0024970.
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.
DE
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
919.707.9000
NORTH CAROLINA
negrmenl of Environmental WAR' Xs. lel"

DocuSign Envelope ID: 76D83CDA-BB6C-4E84-86E3-3F474179FA2F
Ms. Charles, Director of Utilities
February 27, 2023
Page 2 of 3
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 facilities 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.
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.

DocuSign Envelope ID: 76D83CDA-BB6C-4E84-86E3-3F474179FA2F
Ms. Charles, Director of Utilities
February 27, 2023
Page 3 of 3
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 Amir Adaryani
at telephone number [phone] or by email at Amir [e-mail].
Sincerely,
DocuSigned by:
B0B410 9F6204F7...
for Ric and E. Rogers, Jr.
Director, Division of Water Resources
by Min Xiao, PE
NPDES Industrial Permitting Unit
With Engineer's Certificate attached:
cc: NPDES Files
ecopy: Grant Sharpe, PE
Brown and Caldwell
Email: [e-mail]
DWR Mooresville Regional Office, Water Quality Programs
Without Engineer's Certificate attached:
cc: Mecklenburg County Health
ecopy: DWI/Ken Pohlig, PE