Ontario: Occupational Exposure Limits 2012 Update

June 15, 2012

Occupational Exposure Limits (OELs) set an upper limit for the amount and length of time that a worker can be exposed to hazardous substances via inhalation. There are OELs for over 725 substances outlined in R.R.O. 1990, Regulation 833 (Control of Exposure to Biological or Chemical Agents) and Ontario Regulation 490/09 (Designated Substances) under Ontario’s Occupational Health and Safety Act.

Changes to the occupational exposure limits (OELs) in Regulation 833 and O. Reg 490/09 have been made by O. Reg. 149/12 and O. Reg. 148/12.

The proposals included in the Ministry’s 2010 and 2011 consultation documents have been adopted other than the proposal for the substance hydrogen sulfide, which remains under review by the Ministry.

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