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Designated Substances Welcome Graphic


The following substances are specially regulated in Ontario:

Acylonitrile Arsenic Asbestos
Benzene Coke Oven Emissions Ethylene Oxide
Isocyanates Mercury Lead
Silica Vinyl Chloride  

If you use any of these materials, please notify Occupational Health & Safety (OHS) by completing an Inventory Form (Excel). Send the completed form to Anne Marie McCusker via e-mail. You must also ensure that you are familiar with the legislated requirements.

Western's Designated Substances Program PDF document
When a designated substance is present in the workplace, the Occupational Health and Safety Act requires the employer to review the work methods and assess the likelihood of worker exposure. When there is likelihood of worker exposure, a control program must be instituted that includes engineering controls, work practices, hygiene practices, training record keeping and medical surveillance, if applicable.

Additional steps such as air monitoring and health assessments may be required by OHS and Workplace Health.

If you have any other questions contact Tony Hammoud or Anne Marie McCusker.

Regulations:

  • Asbestos on Construction Projects and in Buildings and Repair Operations - O.Reg 278/05
  • Designated Substances – Reg 490/09


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