Oil and Gas Occupational Safety and Health Regulations

11.6 (1) A hazardous substance shall not be used for any purpose in a work place if it is reasonably practicable to substitute therefor a substance that is not a hazardous substance.

(2) Where a hazardous substance is required to be used for any purpose in a work place and an equivalent substance that is less hazardous is available to be used for that purpose, the equivalent substance shall be substituted for the hazardous substance where reasonably practicable.