NC0024970_Authorization to Construct_19870615

State of North Carolina
Depai ti iient of Natural Resources and Community Development
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor R. Paul Wilms
S. Thomas Rhodes, Secretary June 15, 1987 Director
Mr. 0. Wendell White, City Manager
City of Charlotte
600 E. Trade Street
Charlotte, NC 28202
SUBJECT: Permit No. NC0024970
Authorization To Construct
City of Charlotte
Wastewater Treatment Facility
EPA Project No. C370377-07
Dear Mr. White:
The 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
and improvements to the existing 30.0 mgd activatedsludge plant to consist
of additions, modifications and improvements to the existing 30.0 mgd
activated sludge wastewater treatment plant to consist of a new adminis-
tration building; a new maintenance facility; two (2) new gravity.
sludge thickners; mechanical sludge screening and pumping facility;
two aeration basin splitter boxes; one (1) clarifier splitter box;
one (1) gravity filtration complex consisting of eight (8) filters
with central backwash system; a non -potable water pump station and
piping; a sludge thickening/dewatering complex with one (1) new dewatering
centrifuge, three (3) new thickening centrifuges and relocation/
modifications of one (1) existing dewatering centrifuge; an effluent
weir box; modification to the existing influent structure; a new mechanical
bar screen and conveyor system; modifications to the existing
mechanical bar screen; one (1) grit separator and classifier; influent
pump station modifications; modifications to the primary clarifier
to improve sludge removal; trickling filter ventilation; improvements
to existing final clarifiers; conversion of polishing ponds to
mechanically aerated post aeration basins; modifications to the
intermediate pump station and RAS pump station; modification to the
existing chlorine contact basins, chlorine storage building, and chlorine
feed system; aeration blower facility modifications; anaerobic digester
modifications, including changes to the digester, sludge holding tank,
sludge holding tank, digester control building, boiler building; gas storage
sphere and the sludge holding tank controlbuilding; and associated
instrumentation, yard piping, site work and electrical work.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Do not proceed with construction until the Authorization -to -Award
package, EEO, and MBE documentation/certification have been reviewed, and
you are in receipt of our approval if Federal Funding is desired for
project construction.
The permittee shall employ an actively State certified wastewater
treatment plant operator to be in responsible charge of the wastewater
treatment facilities. Such operator must hold a valid State certificate of
the grade at least equivalent to the classification assigned to the wastewater
treatment facilities by the Certification Commission. When a new chief
operator must be obtained to be in responsible charge of the new facilities,
it is required that this be done by the time the construction of the facili-
ties is 50% completed.
This Authorization -to -Construct is issued in accordance with Part III,
Paragraph C of NPDES Permit No. NC0024970 issued June 1, 1984,
and shall be subject to revocation unless the wastewater treatment facilities
are constructed in accordance with the approved plans, specifications, and
supporting documents; and are in compliance with the conditions and
limitations specified in Permit No. NC0024970.
The permittee shall obtain a sludge analysis and a sludge E.P. toxicity
analysis; and obtain approval of these analyses from the Division of
Health Services, Solid Waste Management Branch prior to the disposal of
any sludge from the new wastewater treatment plant. Copies of the
analyses, supporting documents, and approvals shall be submitted to the
Division of Environmental Management's Water Quality Section and the
Mooresville Regional Office.
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
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 contractors responsibilities
shall be in complying with these acts.
The selling or free distribution of wet, dried, composted sludge or
sludge -like materials from wastewater facilities without prior review and
approval by this Division is illegal.
One (1) set of final approved plans and specifications is to be
forwarded to you, one (1) set to the Environmental Protection Agency (EPA),
and one (1) set to the Corps of Engineers.

If you have any questions or need additional information, please contact
Mr. Bill Hoffman, telephone number 919/733-6900.
Sincerely,
R. Paul
cc: Mecklenburg County Health Department
CH2M Hill - Charlotte
CH2M Hill - Atlanta
Arthur Mouberry
Walter D. Taft
Ron McMillan
Bobby Blowe
W. S. Hoffman
Charlotte - CE
EPA
EMU
GPF
Wilms