Canada Occupational Health and Safety Regulations

10.17 (1) Every ventilation system installed on or after January 1, 1997 to control the concentration of an airborne hazardous substance shall be so designed, constructed, installed, operated and maintained that

• (a) the concentration of the airborne hazardous substance does not exceed the values and levels prescribed in subsections 10.19(1) and 10.20(1) and (2); and

• (b) it meets the standards set out in

  • (i) Part 6 of the National Building Code,

  • (ii) the publication of the American Conference of Governmental Industrial Hygienists entitled Industrial Ventilation, 20th edition, dated 1988, as amended from time to time, or

  • (iii) ANSI Standard ANSI Z9.2-1979 entitled Fundamentals Governing the Design and Operation of Local Exhaust Systems, dated 1979, as amended from time to time.

(2) To the extent that is reasonably practicable, every ventilation system installed before January 1, 1997 to control the concentration of an airborne hazardous substance shall be maintained so as to meet the requirements set out in subsection (1).