From: Tom Blewett (BLEWETT@epd.engr.wisc.edu)
Date: Sun Sep 07 1997 - 16:01:38 CDT
Deb Kramer and colleagues,
You may already have the Wisconsin retention factor, but I did not
see it. The following summary was put together with Mike Sloat from
A 50% retention factor is allowed if the following are met:
1. the vapor pressure of the the cleaning solvent is <10mm Hg or the
solvent contains less than 30% VOC by weight,
2. shop towels are handled properly, laundered, incinerated or
disposed following all appropriate regulations,
3. soiled towels are kept in closed containers on site and during
A 40% retention factor is allowed is the follwing are met:
1. the vapor pressure of the cleaning solvent is >10 but <25mm Hg or
the cleaning solvent contains more than 30% VOC by weight.
2. (same as above for 50% factor)
3. (same as above for 50% factor)
Zero retention factor is allowed if the above criteria are not met.
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