NC0085871_Application (ATC)_19971106

State of North Carolina
Department of Environment, .
Health, and Natural Resources 4 •
Division of Water Quality
JamesB. Hunt, Jr.,Wayne McDevitt, Secretary H
A. Preston Howard, Jr., P.E., Director
November 6, 1997
Mr. Andy Karlbergs
ABB Flakt, Inc.
Post Office Box 5309
Norwalk, Connecticut 06851
Subject: '=iPerinit'NiT:141C00858
Authorization to Construct
Flakt Products Site
Groundwater Remediation
Forsyth County
Dear Mr. Karlbergs:
A letter of request for an Authorization to Construct was received August 4, 1997 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 installation of a groundwater treatment system
consisting of extraction wells, sequestering agent tank and transfer pump, 1000 gallon equalization tank
with transfer pump, low profile air stripper(20-60 GPM), effluent discharge pump, peristaltic pump (to be
installed on effluent discharge line to allow for collection of composite samples for chronic toxicity), and
all necessary pumps, piping, and other appurtenances with final discharge of treated wastewater to Brushy
Fork in the Yadkin-Pee Dee River basin.
The majority of contaminants in the groundwater are volatiles that should be removed by the air
stripper. John Funk (Rust Environment and Infrastructure) maintains that the treatment system should
meet permit limits (TSS and Chronic Toxicity) without granular activated carbon (GAC). The Division
recommends the Permittee install activated carbon if facility falls either one of its permit limits.
This Authorization to Construct is issued in accordance with Part III, Paragr;ph A of NPDES
Permit No. NC0085871 issued January 22, 1997 and shall be subject to revocation unless the wastewater
treatment facilities are constructed in accordance with the conditions and limitations specified in Permit No.
NC0085871.
Any sludge generated from this treatment facility must be disposed of in accordance with G.S.
143-215.1 and in a manner approved by the North Carolina Division.of Water Quality.
In the event that the facility fails 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 Winston-Salem Regional Office, telephone number(910) 771-4600, 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

Mr. Karlbergs
November 6, 1997
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.
Failure to abide by the requirements contained in this Authorization to Construct may subject the
Permittee to an enforcement action by the Division of Water Quality 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 Paul Clark, telephone number(919)733-5083
extension 580.
Sincerely,
A4;144_
. Preston Howard, r., P.E.
cc: Central Files •
Winston-Salem Regional Office,Water Quality
Technical Assistance and Certification Unit
Point Source Compliance/Enforcement Unit
John Funk, Rust Environment and Infrastructure
5510 Six Forks Road, Suite 200
Raleigh, NC 27609

Mr. Karlbergs
November 6, 1997
Page 3
Engineer's Certification
I, , as a duly registered Professional Engineer in the State of North
Carolina, having been authorized to observe (periodically, weekly, full time) the construction of the
project, , for the
Project Name Location
Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation
of the construction such that the construction was observed to be built within substantial compliance and
intent of the approved plans and specifications.
Signature Registration No.
Date