Dry abrasive blasting
Dry abrasive blasting means cleaning, polishing, conditioning, removing or preparing a surface by propelling a stream of abrasive material with compressed air against the surface. Hydroblasting, wet abrasive blasting, or other abrasive blasting operations which employ liquids to reduce emissions are not dry abrasive blasting.
40 CFR § 63.11522
The terms used in this subpart are defined in the CAA; and in this section as follows: