NC0036668_authorization to construct_19960329

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B.,Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
March 29, 1996
Honorable Conrad H. Jenkins, Mayor
Town of Kenansville
P. O. Box 370
Kenansville, North Carolina 28349-0376
Dear Mayor Jenkins:
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SUBJECT: Town of Kenansville
Permit No. NC0036668
Authorization to Construct
Wastewater Treatment Facilities
Project No. CS370591-03
Duplin County
The final plans and specifications for the subject project have been reviewed and
found to be satisfactory.
Authorization is hereby granted for additions and modifications to the existing
influent pump station to consist of the following: new pump motors to increase capacity
to 550 gpm per pump, a 75 KW standby generator, and approximately 1,835 1.f. of 10-
inch force main to the existing 8-inch force main; construction of a 0.300 mgd aeration
facility across the road from the existing 0.170 mgd facility consisting of the following:
dual manual bar screens; dual gravity -type grit chambers; an ultrasonic flow meter; dual
oxidation ditches each containing one 25 Hp rotor aerator, sized for a total of
approximately 30 hours hydraulic detention time; dual 26 ft. diameter, 12 ft. sidewater
depth secondary clarifiers; a new chlorine contact tank and gas chlorination system; a
chlorine dissipation tank with a 1 Hp, floating aerator; approximately 1,250 ft. of 14-inch
effluent force main piping; a 600 ft.2 chemical feed/storage and sludge pumping building
that includes a 37041.2 pump area with two 325 gpm RAS pumps and one 125 gpm WAS
pump, a 75 ft.2 chlorination room, a 48 ft.2 chemical feed room, a 100 ft.2 electrical room,
a 6,000 gallon chemical storage tank with chemical containment (outside building), and a
900 ft.3 sludge wetwell beneath the building; a 125 KW standby generator, and
Construction Grants & Loans Section FAX [phone]
P. O. Box 29579, Raleigh, North Carolina 27626-0579 ]'?!j4
An Equal Opportunity Affirmative Action Employer
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associated yard piping, site, and electrical work; modifications to the existing 0.170
wastewater treatment plant consisting of the following: converting an existing clarifier to
sludge digestion by removing the clarifier mechanism, walkway, bridge, weirs, baffle
skirt, etc., and installing a 10 Hp floating aerator; converting the existing 0.190 mg
oxidation ditch to digested sludge storage; continued use of the existing sludge digester,
sludge drying beds, and the existing 12-inch outfall; and associated yard piping, site, and
electrical lAiork.
In addition to the facilities itemized above, the Town of Kenansville will install
dechlorination facilities at the site of the existing wastewater treatment plant consisting of
a sulphur dioxide (SO2) chemical feed system installed upstream of the existing post
aeration system.
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.
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 facilities is 50% complete.
This Authorization -to -Construct is issued in accordance with Part III, Paragraph B
of NPDES Permit No. NC0036668, issued May 31, 1994 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. NC0036668. Should non-
compliance with NPDES Permit limits be attributable to the absence of tertiary filtration,
the permittee shall immediately construct and place into operation tertiary filters
necessary to consistently meet NPDES Permit effluent limitations. The town's NPDES
Permit may also be administratively reopened to include this requirement.
The Permittee shall have an acceptable sludge analysis and a sludge toxicity
analysis which have been approved by the Division of Environmental Management,
Water Quality Section prior to the disposal of any sludge from the modified wastewater
treatment plant. Copies of the analyses, supporting documents, and approvals shall be
submitted to the Division of Environmental Management's Wilmington Regional Office.

The disposing, 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.
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.
One (1) set of final approved plans and specifications is to be forwarded to you for
your files. The copy of the approved plans and specifications shall be maintained on file
by the Owner for the life of the project.
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 approved plans and specifications. Mail
the Certification to the Permits and Engineering Unit, P. O. Box 29535, Raleigh, North
Carolina 27626-0535. (Engineer's Certification Form is attached.)
If you have any questions or need additional information, please contact
Mr. Cecil G. Madden, Jr., P.E. at [phone].
Sincerely,
Az
A. Presto Howard, Jr., P.E.
Attachment
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