NC0026000_authorization to construct_19960528

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
May 28, 1996
Mr. Al Leonard, Jr., Town Manager
Town of Tabor City
P.O. Drawer 655
Tabor City, North Carolina 28463
Subject: Permit No. NC0026000
Authorization to Construct
Reconfiguration of WWTP
Tabor City WWTP
Columbus County
Dear Mr. Leonard:
A letter of request for an Authorization to Construct from the Town of Tabor City was received
December 29, 1995 by the Division (with final revised plans received May 1, 1996). Final plans and
specifications for the subject project have been reviewed and found to be satisfactory. These final plans
are approved in accordance with the letter submitted April 1, 1996 regarding the revisions to the original
plans (approved revised plans included with this package). Authorization is hereby granted for revisions
to the 1.1 MGD treatment plant including: the reparation of influent pumping; installation of influent
screening; installation of grit removal; modification of aeration basins which shall include conversion of
aeration basin number 2 to an aerated equalization basin, use of aeration basin number 1 as the only
aeration basin, installation of 2, 15 HP mixers (maintain 4 existing 50 HP surface aerators); conversion of
'collector' to a clarifier (clarifier number 2); use of clarifier number 1 and 2 in series; reparation of
existing chlorine contact chamber; installation of dual feed chlorination and dual feed sulfur dioxide
dechlorination; use of existing aerated polishing pond number 2 for post aeration; and all other repairs
and replacements as indicated. All additions and improvements shall be as indicated in the approved plans
and specifications including all the associated valves, piping, and appurtenances.
Please be aware that post aeration or an equivalent method should be used in order to meet the
effluent dissolved oxygen limit of 6.0 mg/1 as required in the NPDES permit. As stated above, aerated
polishing pond number 2 has been specified to meet this requirement. Should Tabor City choose another
method of post aeration, a modification of this Authorization to Construct permit would be required.
The Division also recommends that the Town install the floating decanter in the sludge digester as
future budget allotments allow.
This Authorization to Construct is issued in accordance with Part III, Paragraph B of NPDES
Permit No. NC0026000 issued November 15, 1994, and shall be subject to revocation unless the
wastewater treatment facilities are constructed in accordance with the conditions and limitations specified in
Permit No. NC0026000.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
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Permit No. NC0026000
Authorization to Construct
Tabor City WWTP
Page 2
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 Environmental Management.
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 Wilmington Regional Office, telephone number (910) 395 - 3900, 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 Permits and Engineering Unit, P.O. Box 29535, Raleigh, NC
27626-0535.
A copy of the approved plans and specifications shall be maintained on file by the Permittee for the
life of the facility.
Failure to abide by the requirements contained in this Authorization to Construct may subject the
Permittee to an enforcement action by the Division of Environmental Management in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
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. If you have any
questions or need additional information, please contact Susan A. Wilson, telephone number 919/733-
5083, ext. 555.
Sincerely,
6iLt
Preston Howard, Jr., P.E.
cc: Central Files
Wilmington Regional Office, Water Quality
Technical Assistance and Certification
Columbus County Health Department