OHS Guidelines: Exposure limits

Guidelines — Occupational Health and Safety Regulation

• Part 5 Chemical Agents and Biological Agents
  • Table of Exposure Limits for Chemical and Biological Substances
    The table has been updated to reflect changes to OHS Policy R5.48-1 (amended August 20, 2025). Deletions are shown as strikethrough; additions and revisions are highlighted in green.

New and revised guidelines are posted for a 60-day preliminary period, during which time the stakeholder community may comment and request revisions.

Editorial revisions were also made to the following guidelines:

• Part 8 - Safety Headgear
  G8.12/8.13 Use of safety headgear for workers on ATVs and similar equipment in agricultural operations
• Part 6 Forestry Operations and Similar Activities
  G26.11(3) High stem density of dangerous trees - Requesting approval