SILICA IN THE WORKPLACE
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365-AXJ-01-iGDO © 2020, Workplace Safety & Prevention Services (WSPS)
1 877 494 WSPS (9777) | 905 614 1400 | wsps.ca
WSPS.CA
The preceding factors must be considered during the process of selection. When a respirator is
provided to workers, the employer must develop a written respiratory protection program as outlined
in the designated substances regulation (O. Reg 490/09, s.26.1 to 26.5). This includes proper respirator
selection, care and use; limitations of the respirator; fit testing, training and instruction, filter/cartridge
change out schedules and more. A Respiratory Protection Program can be based on the requirements
of Canadian Standards Association (CSA) Standard Z94.4, selection, use, and care of respirators.
In addition to respiratory protection, workers exposed to crystalline silica may be required to wear
other personal protective equipment, such as goggles. gloves and protective outer clothing. The clothing
materials used are often very tightly woven or sealed by resins.
Use of personal protective equipment carries a cost to the user. Among the factors, which must be
recognized, are the following:
Reduced vision
Reduced performance due to increased difficulty in breathing
Reduced manual dexterity
Increased frequency of accidents
Possible hyperventilation syndrome
Increased susceptibility to heat stress
For the preceding reasons the use of personal protective equipment, such as outlined here, should be
considered only as the last line of defence rather than the first.
