NC0030210_authorization to construct_19990305

State of North Carolina
KMA
Department of Environment f •
and Natural Resources
Division of Water Quality
OWAMW�James B. Hunt, Jr., Governor NCDENR
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
March 5, 1999
Mr. Douglas Bean,Director
Charlotte-Mecklenburg Utility Department
5100 Brookshire Blvd.
Charlotte,North Carolina 28216
Subject: Permit No. NC0030210
Authorization to Construct
Project No. 030210ACC
CMUD Mallard Creek WWTP
Mecklenburg County
Dear Mr. Bean:
The Division received a letter of request for an Authorization to Construct November 10, 1999
and final plans and specifications for the subject project have been reviewed and found to be
satisfactory. Authorization is hereby granted to expand the existing Mallard Creek WWTP in
Mecklenburg County with discharge into the Mallard Creek in the Yadkin River Basin to 12.0
MGD.
Specifically, authorization is granted for the construction/installation of:
• Two mechanically cleaned fine bar screens (18 MGD capacity ea.),
• Replacement of five influent pumps (firm capacity 24 MGD),
• Two vortex type grit chambers with bypass and grit removal/classifier,
• One 1.0 MGal. day tank with 4 mixers (10 HP ea.) and pumps (24 MGD firm capacity),
• One 0.125 MGal. flow EQ basin for plant drains flows with pumps,
• Conversion of the existing polishing pond to a lined 5.0 MGal. flow equalization basin
with 4 floating aerators (40 HP ea.),
• Intermediate pumping station,
• 85 ft. dia. primary clarifier and primary sludge pumping station no. 2,
• Modification/expansion of the existing RAS pumping capacity,
• 4 MGD activated sludge treatment basin with fine bubble diffused air and anoxic zones,
• 100 ft. dia secondary clarifier and RAW/WAS pump station no. 2,
• Chemical feed facilities for alkalinity addition,
• Two effluent filtration basins (1120 sf. ea.),
• Effluent UV disinfection, 12 modules (12 MGD) capacity),
• 85 ft. anaerobic digester and sludge heater building,
• Rehabilitation of two existing anaerobic digester covers and mixing systems,
• Centrifuges for WAS thickening and digested biosolids dewatering,
P.O.Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]/FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post-consumer paper

Permit No. NCO030210 ATC Number 030210ACC
Conversion of the preliminary treatment structure into a septage receiving station,
2,000 kW stand-by power generator with double walled fuel storage tank,
Replacement of the exiting plant control system,
• Electrical controls, manholes, cleanouts,piping, valves and appurtenances.
i
This Authorization to Construct is issued in accordance with Part III, Paragraph A of NPDES
Permit No. NCO030210 issued April 27, 1998, and shall be subject to revocation unless the
wastewater treatment facilities are constructed in accordance with the conditions and limitations
specified in Permit No. NCO030210.
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 North Carolina Division of Water Quality.
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 this 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 in-place
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, this Authorization to Construct and the
approved plans and specifications. Mail the Certification to the NPDES Unit, P.O. Box 29535,
Raleigh,NC 27626-0535.
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 Title 15A, Chapter 8A, .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, and must properly manage and
document daily operation and maintenance of the facility and must comply with all other
conditions of Title 15A, Chapter 8A, .0202. Once the facility is classified, the Permittee must
submit a letter to the Certification Commission which designates the operator in responsible
charge within thirty days after the wastewater treatment facilities are 50%complete.
The Operational Agreement between the Permittee and the Environmental Management
Commission is incorporated herein by reference and is a condition of this Permit.
Noncompliance with the terms of the Operational Agreement shall subject the Permittee to all
sanctions provided by G. S. 143-215.6 for violation of or failure to act in accordance with the
terms and conditions of this Permit.
Failure to abide by the requirements contained in this Authorization to Construct may subject the
Permittee to an enforcement action by the Division of Water Quality in accordance with North
Carolina General Statute 143-215.6A to 143-215.6C.
30210ACC ATC hr

Permit No.NCO030210 ATC Number 030210ACC
The issuance of this Authorization to Construct 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.
One (1) set of approved plans and specifications is being forwarded to you. The Permittee shall
maintain a copy of the approved plans and specifications on file for the life of the facility. If you
have any questions or need additional information,please contact Steve Pellei, telephone number
[phone], extension 516.
Sincerely,
elll��--. Preston Howard, r., P.E.
cc: Central Files
NPDES Unit, Permit File
Mooresville Regional Office, Water Quality
Technical Assistance and Certification Unit
Mr. David Parker, P.E., Black& Veatch
8604 Cliff Cameron Drive, Suite 164, Charlotte,North Carolina 28269
30210ACC ATC Ur