Among other things, blasting plants emit dusty exhaust air. According to various regulations and laws, strict guidelines and limit values may have to be met.
If the blasting plant itself emits dust during operation, or if dust comes out of the vent stack, measures other than mere measurement are required. Weaknesses can be uncovered with fluorescent test dust and a special UV lamp. Otherwise there is a risk of recourse claims from the neighbourhood due to flash rust damage to vehicles and buildings.
Such a test to localise the escaping dust is quick and easy to perform.