NC0024911_authorization to construct_19940630

State of North Carolina IT
Department of Environment, LTIK;VA
Health and Natural Resources A4 • ao
Division of Environmental Management Awl
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary H N F1
A. Preston Howard, Jr., P.E., Director
June 30, 1994
Mr. W.H. Mull, P.E., Engineer Manager
MSD of Buncombe County
P.O. Box 8969
Asheville, NC 28814
Subject: Permit No. NCO024911
Authorization to Construct
MSD/Buncombe Co. WWTP
Buncombe County
Dear Mr. Mull:
A letter of request for an Authorization to Construct was received March 24, 1994 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 and operation of a prefabricated dechlorination unit
consisting of a gas feeder with a minimum capacity of 300 pounds per day sulfur dioxide, 9 foot 9 inch
diffuser of 1 1/4 inch PVC pipe placed before the existing exit from the chlorination unit, and all the
associated valves, piping, and appurtenances with discharge of treated wastewater into the French Broad
River which is classified C waters.
The Division recommends that Buncombe County MSD maintain precise control over the
dechlorination unit to avoid excess sulfur dioxide which may decrease the dissolved oxygen in the
wastewater.
This Authorization to Construct is issued in accordance with Part III, Paragraph. D of NPDES
Permit No. NCO024911 issued June 15, 1989, and shall be subject to revocation unless the wastewater
treatment facilities are constructed in accordance with the conditions and limitations specified in Permit No.
NCO024911.
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 Asheville Regional Office, telephone number(704) 251-6208, 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]
An Equal Opportunity Affirmative Action Employer 50%recycled/10%post-consumer paper

Permit No. NC:0024Q 1 1
Authorization to Construct
it1SDBuncombe County
June 30, 1994
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.
Upon classification of the facility by the Certification Commission, the Permittee shall employ a
certified wastewater treatment plant operator to be in responsible charge(ORC) of the wastewater treatment
facilities. The operator must hold a certificate of the type and grade at least equivalent to or greater than the
classification assigned to the wastewater treatment facilities by the Certification Commission. The
Permittee must also employ a certified back-up operator of the appropriate type and grade to comply with
the conditions of Title 15A, Chapter 8A, .0202. The ORC of the facility must visit each Class I facility at
least weekly and each Class II, III, and IV facility at least daily, excluding weekends and holidays, and
must properly manage and document daily operation and maintenance of the facility and must comply with
all other conditions of Title 15A, Chapter 8A, .0202.
A copy of the approved plans and specifications shall be maintained on file by the Pern-duee 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.
Sincerely,
�417
Preston � ward, Jr., P.E.
cc: Asheville Regional Office, Water Quality