(800) 499-7232

Definition of Safety Compliance Terms

Action LevelThe exposure level to which corrective action must be taken
ACGIHAmerican Conference of Governmental Industrial Hygienists
AmbientAn encompassing atmosphere: environment
CeilingThe concentration that should not be exceeded during any part of the working exposure. It may be assessed by sampling over a period of time that should not exceed 15 minutes.
CDCCenter for Disease Control
DiffusionThe process whereby particles of liquids, gases, or solids intermingle as the result of their spontaneous movement
DosimeterA device for measuring doses of radiation or hazardous vapors
ExcursionOne complete movement of expansion and contraction of the lungs
JCAHOJoint Commission on Accreditation of Healthcare Organizations
NFPANational Fire Protection Association
NIOSHNational Institute for Occupational Safety and Health
OSHAOccupational Safety and Health Administration
PPMParts Per Million
PassiveWithout the intervention of mechanical devices
PELPermissible Exposure Limit
STELShort Term Exposure Limit: The concentration to which it is believed that workers can be exposed continuously for a short period of time without suffering adverse effects.
TLVThreshold Limit Value: The point at which a physiological effect begins to be produced
TWATime Weighted Average: The concentration for a conventional 8-hour workday and a 40-hour workweek, to which it is believed that nearly all workers may be repeatedly exposed, day after day, without adverse effects