Owner’s Responsibilities on Designated Substances and Hazardous Materials on Construction Projects
In Ontario, under the Occupational Health and Safety Act, designated substances must be identified and documented on a construction or renovation project site before work begins. Contractors must be notified about these substances either through tenders or terms of reference, or as part of a contract. Contractors must follow Ontario Ministry of Labour regulations regardless of jurisdiction and we recommend owners follow this diligent approach in the absence of adequate federal regulation (on lands subject to federal regulation).
As it relates to and impacts construction, we will discuss the health hazards, responsibilities, regulations and guidelines, and identification of common building materials related to the following hazards in residential dwellings, community and small commercial buildings:
∙ Lead, Mercury and Silica