دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the process of obtaining baseline physicals for employees involved in emergency response or hazardous waste cleanup and monitoring their health at specified intervals. Under HAZWOPER, medical surveillance is applied to members of organised HAZMAT teams and hazardous materials specialists and any emergency response employee who exhibits signs or symptoms of exposure, or wears a respirator for thirty days or more a year, or is exposed to hazardous substances at or above the permissible exposure limits. A 200-mesh screen with a wire diameter of 0.0021 inch (0.0533 millimetre) has an opening of 0.074 millimetre, or will pass a particle of 74 microns. See micron.