A Designated Substance Report (DSR) is a requirement when renovating or demolishing a building. The Ontario Occupational Health and Safety Act requires a list of all designated substances to be provided to any contractors bidding on construction projects involving existing buildings. This list allows contractors to take any necessary steps to control exposure of workers and members of the public to the designated substances identified to be present on the project site. Locations and concentrations of designated substances are also included in the report.
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