Particulate and Particulate Aerosol the Same Thing?

Mike, I am sure Jim will set me straight if I am wrong but basically its a matter of size. an aerosol is a very small particle.If I recall particles larger then 10 microns (PM-10) are not an inhalation hazard but when they get down to 2.5 microns they can get trapped in the lungs. PM-1 (1 micron will get absorbed into the blood steam and are considered an aerosol.
 
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