NC0004626_AUTHORIZATION To Construct_19920930

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street- Raleigh,North Carolina 27611
James G.Martin,Governor A.Preston Howard,Jr:,P.E.
William W.Cobey,Jr., Secretary Acting Director
September 30, 1992
Mr. J. W. Buchanan, Supervisor
Environmental Affairs
PPG Industries, Incorporated
Post Office Box Box 949
Lexington,North Carolina 27292
Subject: Permit No. NC0004626
Authorization to Construct
PPG Industries, Incorporated
Lexington Plant
Wastewater Treatment Facility
Davidson County
Dear Mr. Buchanan:
A letter of request for an Authorization to Construct was received July 6, 1992, 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 50 ft. diameter clarifier to replace the two 31 ft.
diameter clarifiers with discharge of treated wastewater into North Potts Creek.
This Authorization to Construct is issued in accordance with Part III paragraph A of NPDES
Permit No. NCO004626 issued January 11, 1990, and shall be subject to revocation unless the wastewater
treatment facilities are constructed in accordance with the conditions and limitations specified in Permit No.
NC0004626.
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.
Regional Offices
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704MI-6208 919/486-1541 704/663-1699 919/5714700 919/946-6481 9191395-3900 919/896-7007
Pollution Prevention Pays
P.O.Box 29535,Raleigh,North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

The Winston-Salem Regional Office,phone no. 919/896-7007, 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.
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 H, 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 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 Ms. Angela Y. Griffin, telephone number
9191733-5083.
cerely,
A. Preston H ward, ., P. .
cc: Davidson County Health Department
Winston-Salem Regional Office,Water Quality
Training and Certification Unit