respirable criteria

["Archer, Joe" <archerj@wipp.carlsbad.nm.us>]

NESHAPs  sets release limits based on dose.  We operate in a dusty 
environment where the dust is visible.   It seems reasonable that we 
could justify eliminating non-respirable particles from our release 
values.  Does anyone know if this is prohibited?  Also, I've seen 
references to respirable cut off values between 2.5 and 5 microns 
although I've seen HP limits at 10 microns.  Does anyone know what the 
EPA could live with?  Could cyclone or other devices be used to 
eliminate water from an air stream and would that require they be 
cleaned every time they get wet?  Lastly, if the point is not already 
moot, can anyone give me some vendors who sell 20 or 40 l/min cyclone 
units.

Thank you
Please respond to archerj@wipp.carlsbad.nm.us unless it sounds like 
this may be of any interest to anyone else.