Document 2480V4yXKJLoQJzEB0dYyR3g

abex corporation industrial hygiene survey GLOSSARY cfm - cubic feet per minute Daily noise dose - A numerical expression of the total noise exposure an employee receives during the day. if the daily noise dose exceeds 1.00, the noise exposure to the employee is excessive. dBA - Decibels symbol denoting the relative intensity of sound pressure levels (re: 0.0002 dyne/square cent meter) f pm GRA mg/M^ - feet per minute - General Room Atmosphere - milligrams per cubic meter of air MSrr )pcf NIOSH approved - Medical Study No. million particles per cubic foot of air - Approved by the National Institute for Occupationa Safety and Health OBZ ppm Operator's Breathing zone parts per million by volume PS TLV Ventilationrv- Personal Sample Threshold Limit Value for an 8 hour daily exposure 1 The terms ventilated,,,ventilating, or exhaust impl the use of mechanical means such as a fan for air movement unless otherwise noted.