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S-2.1, r. 4 - Safety Code for the construction industry
Section 3.25.6
Disposition versions
3.25.6. Respiratory protection: When work involving a material presumed to contain or containing crystalline silica is carried out, in addition to one of the control measures listed in section 3.25.4, except in the case of those set out in subparagraph c or d, the wearing of a protective respiratory apparatus is mandatory for all workers present in the work area where one of the following types of work is carried out:
(a) sawing;
(b) grinding, sanding or bush hammering;
(c) jackhammering;
(d) boring in a confined location;
(e) drilling.
The protective respiratory apparatus supplied by the employer must provide at minimum an assigned protection factor of 10 and be equipped with a 100 series or HEPA high-efficiency filter.
The obligations set out in section 45.1 of the Regulation respecting occupational health and safety (chapter S-2.1, r. 13) apply where one of the types of work provided for in this section is carried out. In addition, the protective respiratory apparatus must be selected, used and cared for in accordance with CAN/CSA Standard Z94.4-11 Selection, use, and care of respirators.
The wearing of a protective respiratory apparatus is not mandatory where the employer demonstrates that the level of exposure of workers to silica dust is less than the permissible exposure values indicated in Schedule I to the Regulation respecting occupational health and safety.
3.25.6. Respiratory protection: When work involving a material presumed to contain or containing crystalline silica is carried out, in addition to one of the control measures listed in section 3.25.4, except in the case of those set out in subparagraph c or d, the wearing of a protective respiratory apparatus is mandatory for all workers present in the work area where one of the following types of work is carried out:
(a) sawing;
(b) grinding, sanding or bush hammering;
(c) jackhammering;
(d) boring in a confined location;
(e) drilling.
The protective respiratory apparatus supplied by the employer must provide at minimum an assigned protection factor of 10 and be equipped with a particle filter with an efficiency rate of at least 95%.
The obligations set out in section 45.1 of the Regulation respecting occupational health and safety (chapter S-2.1, r. 13) apply where one of the types of work provided for in this section is carried out. In addition, the protective respiratory apparatus must be selected, used and cared for in accordance with CAN/CSA Standard Z94.4-11 Selection, use, and care of respirators.
The wearing of a protective respiratory apparatus is not mandatory where the employer demonstrates that the level of exposure of workers to silica dust is less than the permissible exposure values indicated in Schedule I to the Regulation respecting occupational health and safety.
