Mr. Johnson,
        We had a consultant do a RACT analysis on our LPISM VOC emission 
controls in circa 1993. That study showed that water scrubbing was the most 
economical at approx. $1600/ton of VOC controlled. (Thermal incineration was the
most costly at over $13,000/ton!). These costs included an amortized cost of the
capital cost of the equipment in addition to the operating costs. However, the 
installed cost of a water scrubber are less than $100K.         Lee Wilmot
                                                                HADCO Corp
                                                        [log in to unmask]
______________________________ Reply Separator _________________________________
Subject: Photoresist and soldermask-solvent emissions
Author:  [log in to unmask] at SMTPLINK-HADCO
Date:    7/14/97 9:26 PM

I am with International Polymer Systems, a company developing adhesives, 
coatings and resists that are environmentally friendly. Our goal 100% 
solven elimination. We are looking for information on the cost for PCB 
manufacturers to handle solvent emissions from liquid photoresist and 
soldermask during application and soft-bake. Cost of ventilation, 
scrubbers, etc.
     
Steven Johnson
IPS
     
     
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