On Board Trains Occupational Health and Safety Regulations

8.8 (1) If there is a hazard of an airborne hazardous substance or an oxygen deficient atmosphere in a work place, the employer shall provide a respiratory protective device that is listed in the United States National Institute for Occupational Safety and Health publication entitled Certified Equipment List, as amended from time to time.

(2) The respiratory protective device shall be selected, fitted, used and maintained in accordance with the standards set out in CSA Standard CAN/CSA-Z94.4-11, Selection, Use, and Care of Respirators, as amended from time to time.

(3) If air is provided by means of a respiratory protective device, the air shall meet the standards set out in CSA Standard CAN/CSA-Z180.1-13, Compressed Breathing Air and Systems, as amended from time to time.