Western Australian Consolidated Regulations The means referred to
in regulation 3.38(c) are —
(a) the
use of an effective ventilation system for the workplace; and
(b) the
provision of an exhaust system that effectively extracts any contaminant and
which is arranged so as to prevent re‑entry of the extracted air into
the workplace; and
(c) such
other means as would prevent persons at the workplace from being exposed to an
oxygen deficient atmosphere or a toxic atmosphere,
as is appropriate to
the particular case.