NC0021253_AUTHORIZATION TO CONSTRUCT_19960315

State of North Carolina
Department of Environment,
Health and Natural Resources ` o
Division of Environmental Management
James B.,Hunt, Jr., Governor ®ema
Jonathan B. Howes, Secretary ® � H
A. Preston Howard, Jr., P.E., Director
March 15, 1996
Mr. Joseph R. Huffman, City Manager
City of Havelock
P. O. Drawer 368
Havelock, North Carolina 28532
SUBJECT: City of Havelock
Permit No. NCO021253
Authorization to Construct
Wastewater Treatment Facilities
Project No. CS370429-04
Craven County
Dear Mr. Huffman:
The final plans and specifications for the subject project have been reviewed and
found to be satisfactory.
Authorization is hereby granted for the construction and operation of additions and
modifications to the existing 1.5 mad contact stabilization wastewater treatment plant to
convert to a 1.9 mad, two stage activated sludge process to include new impellers and
new 20 Hp motors on the three (3) pumps in influent pump station No. 1 (new capacity
1000 gpm each); modification of the flow splitter box with the addition of two (2) 2' 2.5"
weirs to provide equal flow split to the first stage aeration basins; conversion of the
existing contact stabilization tanks to first stage aeration with the addition of fine bubble
diffusers, utilizing the three (3) existing 60 Hp, 1300 cfm blowers; modifications to the
influent and effluent structures of the two existing complete mix aeration basins to allow
a series flow pattern; the addition of a third aeration basin with coarse bubble aeration
utilizing the existing four (4) 40 Hp, 1025 scfm blowers; new impellers on the two (2)
65.7 Hp two stage pumps in the existing final clarifier pump station to provide a new
capacity of 2800 - 5400 _pm; a new final clarifier splitter box; two (2) new 65 ft.
diameter final clarifiers with two (2) 3/4 Hp flocculators each for alum mixing; a 7,500
gal alum storage tank with dual 4.0 - 11.0 gph metering pumps; three (3) new
approximatelyV335 ft'- deep bed, mono-media tertiary filters; a 7,500 gal methanol storage
tank with dual 1.5 - 15.0 gph feed pumps for denitrification; conversion of the existing
chlorine contact basin to ultraviolet disinfection; new dual 5 Hp, 250 gpm pumps in the
Construction Grants & Loans Section Me"It
FAX [phone]
P. O. Box 29579.Raleigh, North Carolina 27626-0579 An Equal Opportunity Affirmative Action Employer
Voice 919-733-6900 50% recycled/100, post-consumer paper

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existing reaeration basin to pump plant effluent to the filter washwater supply basin;
conversion of the existing aerated sludge holding tank to a filter washwater supply basin
and filter backwash holding basin with dual 50 Hp, 2000 gpm backwash pumps; three (3)
new 125 Hp, 1660 cfm blowers to supply air scour for the effluent filters, supply mixing
air for the stabilized sludge holding tank and to serve as a backup air supply to the first
stage aeration basin #2; new metering vaults with ultrasonic flow meters and pinch valves
for controlling return and waste sludge rates; a new 1.0 meter gravity belt thickener with
dual 7.5 Hp, 110 gpm feed pumps in the existing solids handling building; conversion of
the existing final clarifier to a stabilized sludge holding tank; a new slab mounted, double
wall 1.500 gal fuel storage tank for the existing diesel engine generator; and associated
yard piping, site and electrical work.
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 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 facilities is 50% complete.
The Authorization-to-Construct is issued in accordance with Part III, Paragraph B
of NPDES Permit No. NC0021253, issued June 22, 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. NC0021253.
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 new wastewater
treatment plant. Copies of the analyses, supporting documents, and approvals shall be
submitted to the Division of Environmental Management's Washington Regional Office.
The disposing, selling or free distribution of wet, dried, composted sludge or
sludge\ike 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

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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.) . V
If you have any questions or need additional information, please contact Mr. Cecil
G. Madden Jr., P.E. at (919) 71 5-6203. �?
Sincerely,
. Presto Howard, Jr., P.E. _
BG/kc
Attachment
cc: Black and Veatch
Mr. Don Safrit
Washington Regional Office r ? tj i :_.'_.,
Mr. Tom Fahnestock
Mr. Don Evans 'MAR
Ms. Valerie Lancaster
Mr. Bennie Goetze, Jr.
j
Ms. Kim Brantley ,
DMU
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