July 03 2000
Occupational exposure limits restrict the amount and duration of worker exposure to hazardous chemicals in the workplace. The updated occupational exposure limits correspond to the latest exposure limits recommended by the American Conference of Governmental Industrial Hygienists (ACGIH) or update guidelines for other substances not currently covered by the ACGIH limits. For 102 substances, Ontario will adopt the most recent ACGIH limits. For another 42 substances, Ontario will adopt limits for the first time and for an additional 69 substances, Ontario will adopt limits which are included in the Ministry's Work Place Exposure Guidelines but are not currently regulated. A sampling of substances, their current and proposed time-weighted average exposure value (TWAEV) and short-term exposure value (STEV) are set out below.
|Cotton dust, fabric knitting||0.5|
|Lead and its compounds as Pb, except tetraethyl lead||0.05||0.15|
|Ozone - heavy work||0.05|
|Particulars (insoluble) not otherwise classified||10|
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