Definitions for "Exposure Limits"
Keywords:  twaev, stel, twa, pel, tlv
Airborne chemical concentration limits believed to be safe for most workers.
Maximum allowable concentrations of toxic substances in workroom air for workers.
established concentrations which, if not exceeded, will not generally cause adverse effects to the worker exposed. Exposure limits differ in name and meaning depending on origin. For example:- The exposure levels for the hazardous chemicals that are included in the Regulation respecting the Control of Exposure to Biological or Chemical Agents - made under the Occupational Health and Safety Act of Ontario, are expressed as follow: - TWAEV Time-Weighted Average Exposure Value: The average airborne concentration of a biological or chemical agent to which a worker may be exposed in a work day or a work week. STEV Short Term Exposure Value: - The maximum airborne concentration of a chemical or biological agent to which a worker may be exposed in any 15 minute period, provided the TWAEV is not exceeded.