WQ0018892_Final Permit_20030304

0�0� W A rFROG Michael F. Easley, Governor
c,William G. Ross Jr., Secretary
E North Carolina Department of Environment and Natural Resources
=�
Alan W. Klimek, P.E. Director
Division of Water Quality
March 4, 2003
Mr. Colton Carawan, Property Manager
A Place at the Beach — Atlantic Beach, Inc., Southwinds Condominiums
Post Office Box 818 E
Atlantic Beach, North Carolina 28512
Subject: Southwinds Wastewater Treatment Facility
Installation of Tertiary Filter
Permit
vo. CountQy0018992
Carteret
Dear Mr. Carawan:
The subject permit, issued August 6, 2001, and modified November 21, 2 00 1, contains a
requirement for replacing the tertiary filter within 18 months following permit issuance with a unit of
modern design and function. The unit is to be capable of automatically activated backwash and is to be
assisted with an air scour feature. The exposed piping associated with the tertiary filter is also to be
replaced with rigid pipe that is resistant to sunlight and salt air. Replacement piping of three inch
diameter or larger is to be ductile iron pipe and piping smaller than three inches is to be galvanized or
stainless steel.
A submittal has now been received on December 31, 2002, and modified February 20, 2003, for
replacement of the tertiary filter unit. The proposed Pyradeck Polishing Filter unit, manufactured by
Mack Concrete Industries, Inc., is a fixed media upflow system that does not utilize sand or other
conventional filter media so air scouring is not advantageous. There are to be dual units with 96 square
feet of media deck surface area each. Tanks are to be of precast concrete construction. Backwash is to
be accomplished by dual Hydromatic SKV-50 backwash pumps with return to the flow equalization tank.
Exposed piping is expected to meet the guidelines expressed in the referenced permit condition.
Approval is granted for construction and operation of the proposed replacement tertiary filtration
system and associated components. An engineers certification must be submitted upon completion of
installation and prior to operation of the system. This unit will be incorporated into the treatment system
description when the permit is reissued. If you have any questions please call Mr. Ed Beck of the
Wilmington Regional Office at [phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
cc: MacConnell & Associates
. Nondischarge Permitting Unit"
Groundwater Regional Office
Groundwater Central Office
Water Quality Regional Office
Carteret County Health Department
Central Files
_j
N. C. Division of Water Quality 127 Cardinal Drive Extension
(910) 395-39DO Customer Service 0
Wilmington Regional Office Wilmington, NC 28405
[phone] Fax [phone] NDENR