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S. RUSSELL SYLVA
Commissioner
935-2160 February 12, 1986
Infinet, Inc. RE: N.ANDOVER - Metropolitan Boston/
10 High Street Northeast Region
North Andover, Massachusetts 01960 310 CMR 7.02 - Plans Approval
Application No. MBR -85 -IND -028
FINAL APPROVAL
Attention: Mr. Andrew Toth
Gentlemen:
The Metropolitan Boston/Northeast Region of the Department of Environmental
Quality Engineering, in reply to a request dated April 10, 1985, and updated July
19, 1985 and December 20, 1985, has reviewed the plans, specifications, and the
Standard Operating and Maintenance Procedures concerning the installation of a wave
solder machine and associated equipment at Infinet, Inc. 10 High Street, North
Andover,Massachusetts. The submitted information bears the seal and signature of
Mr. Michael Angieri, Massachusetts P.E. No. 28886.
A review of the submittal by Department engineers indicates that it concerns
an application to install an oven, a wave solder machine, and a cleaning machine
which are used in the printed circuit board finishing process.
The oven is a Gruenberg Oven Company, Inc. Model No. KT45C175.5 lab oven which
is used to dry printed circuit boards at a temperature of 450°F. The exhaust is
handled by an ILG Industries Model No. MH1007 centrifugal fan having a rated
capacity of 400 actual cubic feet per minute (ACFM) at 450°F. This fan provides a
gas exit velocity of 19 feet per second through an 8 inch diameter stainless steel
stack, the top of which is 73 feet above ground level.
The boards are next placed in a Hollis Engineering Company Astra 400 Wave
Solder Machine. The wave solder machine is expected to use 2 quarts per day of
Kenco No. 590 wave solder oil and 1.5 quarts per day of Kenco No. 183 wave solder
flux. The exhaust will be ducted to two United Air Specialists, Inc. SMOG HOG
Model No. SH -10 -PE -XB electrostatic precipitators arranged in series, followed by a
SMOG HOG Model No. SH -10 charcoal cabinet. The exhaust from the electrostatic
precipitators and the charcoal cabinet is handled by an ILG Industries Model No. MH
1007 centrifugal fan with a capacity of 900 SCFM which is ducted to a stainless
steel stack, the top of which is 73 feet above ground level. The stack has an exit
diameter of 8 inches which provides a gas exit velocity of 45 feet per second.
Emissions will consist of less than 5 pounds per day of isopropyl alcohol.
The cleaning machine is a Hollis Engineering Company Polyclean II printed
circuit board cleaner which washes the printed circuit boards with 160°F water to
remove flux and loose solder from the boards. Emissions are handled by an ILG
Industries Model No. 1007 centrifugal fan capable of exhausting 1200 ACFM through
an 8 inch diameter stainless steel stack, the top of which is 73 feet above ground
level. The gas exit velocity is 43 feet per second.
Infinet, Inc.
Page -2-
The Department is of the opinion that the plans, specifications, and Standard
Operating and Maintenance Procedures pertinent to the submittal are in conformance
with current air pollution control engineering practice, and hereby grants FINAL
APPROVAL for the project, as submitted, with the following provisos:
1. That this Regional Office will be notified in writing at the above
address when the modification is complete and the unit is ready for
continuous operation.
2. That should any nuisance condition(s) be generated by the operation of
this facility, then appropriate steps will immediately be taken by
Infinet, Inc. to abate the nuisance condition(s).
3. That the ability of the equipment to maintain an emission rate at or
below the stated level be demonstrated when and if, in the opinion of the
Department, such should prove necessary.
Failure to comply with any of the above stated provisions will constitute a
violation of the "Regulations," and can result in the revocation of the approval
granted herein to operate the described equipment. The Department may also revoke
this approval if the construction work is not begun within two years from the date
of issuance of this approval, or if the construction work is suspended for one
year.
For Air Quality Control purposes, an Environmental Notification Form is not
required for this action since it is categorically exempt pursuant to the
Regulations Governing the Preparation of Environmental Impact Reports adopted by
the Secretary of Environmental Affairs. This action has been determined to cause
no significant damage to the environment.
Please be advised that this approval does not negate the responsibility of the
Infinet, Inc. to comply with this or any other applicable federal, state, or local
regulations in the future.
Should you have any questions concerning this matter, please do not hesitate
to contact Mr. Michael J. Maher, Air Quality Section Chief, Metropolitan
Boston/Northeast Region, 5 Commonwealth Avenue, Woburn, Massachusetts 01801.
ery truly yours,
Richard J. alpin
Acting Regional Environmental Engineer
RJC/Err/pd
cc: Board of Health, Town Hall, North Andover, MA 01960
Fire Department, Town Hall, North Andover, MA 01960
DAQC, One Winter Street, Boston, MA 02108 - 8th Floor