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Date: Tue, 23 Apr 1996 01:38:52 -0400
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Subject: Reducing Rinse Water Flow Rates
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Our printed circuit manufacturing facility is currently investigating ways
to
reduce the amount of water used in its rinsing operations.  I understand
that
conductivity meters could be used to ascertain the amount of contamination
within the rinse water; however, is there a predefined limitation as to the
amount of contamination that would be considered acceptable before product
quality would be jeopardized.  In other words are there any established
guidelines to follow when attempting to regulate rinse water flow rates
using
conductivity as the basis for water quality.  

Any assistance regarding water conservation would be greatly appreciated.
======== Fwd by: Tony King / N ========
I would recommend looking at the waste treatment system in addition to
reduction of rinse water used. The RO systems now used in the board industry
offer the advantage of re-using water. The recycled water quality is
equivalent to DI in most cases. The net result is more water availability to
the processes with reduced demand on the incoming supply and reduced
discharge volume.

Tony King
Elexsys International Inc.
603-886-0066