Maritime Occupational Health and Safety Regulations

256 (1) Compressed air, gas or steam must not be used for blowing dust or other substances from structures, machinery or materials if

• (a) there is a risk of any person being directly exposed to the jet or if a fire, explosion, injury or health hazard is likely to result from that use; or

• (b) that use would result in a concentration of an airborne hazardous substance in excess of the values referred to in paragraph 255(1)(a) or the limits referred to in subsections 255(5) and (6).

(2) Compressed air must not be used for cleaning clothing contaminated with

• (a) asbestos; or

• (b) a hazardous substance having an exposure limit referred to in paragraph 255(1)(a) or (b) lower than 1 mg/m³.

(3) If compressed air is used to clean clothing,

• (a) appropriate eye protection must be worn; and

• (b) the maximum compressed air pressure in the line is to be 69 kPa or a safety nozzle limiting the air pressure to no more than 69 kPa must be used.

(4) Compressed air must be used in a manner that the air is not directed forcibly against any person.