CAN/CSA Z94.4-93 (R1997) Historical

1. Scope

1.1
This Standard sets out requirements for the proper selection, use, and care of respirators and for the administration of an effective respiratory protection program in the workplace.

1.2
This Standard is not intended to address the selection of respirators for use against
(a) infectious agents; and
(b) nuclear biological chemical (NBC) agents.
This Standard applies to all other aspects of the respirator program for these agents.

1.3
This Standard is not intended to address
(a) underwater breathing devices;
(b) aircraft oxygen systems; or
(c) inhalators and resuscitators.

1.4
This Standard is written in SI (metric) units. The yard-pound equivalents are provided for information only.

1.5
In CSA Standards, ?shall? is used to express a requirement, ie, a provision that the user is obliged to satisfy in order to comply with the standard; ?should? is used to express a recommedation or that which is advised but not required; and ?may? is used to express an option or that which is permissible within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Legends to equations and figures are considered requirements. See more