NC0036919_authorization to construct_19950731

State of North Carolina
Department of Environment, Y's
w Health and Natural Resources -_I" - —yjq�
Division of Environmental Management A&4
IIAL
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
July 31, 1995
Dr. George Thigpin
Beaufort County Schools
321 Smaw Road
Washington, North Carolina 27889
Subject: Permit No. NCO036919
Authorization to Construct
Beaufort Elementary School
Wastewater Treatment Facility
Beaufort County
Dear Dr. Thigpin:
A letter of request for an Authorization to Construct was received April 14, 1995 by the Division
and final plans and specifications for the subject project have been reviewed and found to be satisfactory.
Authorization is hereby granted for the construction of a new baffle in the dosing tank, conversion of an
existing 2304 square foot sandfilter to a recirculation sandfilter operating at a 5:1 recirculation ratio with
primary and secondary distribution piping, microsprayers and a surface layer of pea gravel, construction
of a 5000 gallon recirculation tank with dual 1.5 HP pumps, a Perc - Rite pump controller with two 1 HP
pumps and backwash controls, remove from service the existing tablet chlorinator and install dual 20 gpm
UV disinfection units with integrated cleaners and controls with discharge of treated wastewater into
Pantego Creek. In addition, continue operation of the existing 9600 gallon septic tank with 2600 gallon
dosing chamber and all related piping.
This Authorization to Construct is issued in accordance with Part III, Paragraph A of NPDES
Permit No. NCO036919 issued March 31, 1995 and shall be subject to revocation unless the wastewater
treatment facilities are constructed in accordance with the conditions and limitations specified in Permit No.
NC0036919.
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 Washington Regional Office, telephone number 919/946-6481, 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.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
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Permit No. NC0036919
Authorization to Construct
Beaufort County BOE
July 31, 1995
Page 2
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.
The sand media of the sand filter must comply with the Division's sand specifications. The
engineer's certification will be evidence that this certification has been met.
A leakage test shall be performed on the recirculation tank to insure that any exfiltration occurs at a
rate which does not exceed twenty (20) gallons per twenty-four (24) hour per 1,000 gallons of tank
capacity. The engineer's certification will serve as proof of compliance with this condition.
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 Mr. Charles Alvarez, telephone number 919/733-
5083, extension 553.
Sincerely,
l 1
Preston 4ard, Jr., P.E.
cc: Beaufort County Health Department
Washington Regional Office,Water Quality
Training and Certification Unit
ATC Files