Mich. Admin. Code R. 325.52008 - Local exhaust ventilation
Rule 8.
(1) An
employer shall provide local exhaust ventilation at all stationary sources. The
director may allow a variance from this subrule if control is accomplished with
general ventilation.
(2) If a local
exhaust system is used, then the exhaust air volume shall create an indraft air
volume at an enclosure, hood, duct, or fan sufficient to control the
contaminant.
(3) A local exhaust
system shall be designed to capture and control the contaminant. Distribution
of exhaust air between various exhaust points may be accomplished by balanced
duct design. If balancing gates are used, they shall be locked permanently in
place after final adjustment.
(4)
An employer shall ensure that the design and construction of a local exhaust
ventilation system is adequate for the contaminant and conditions of service. A
listing of practical ventilation texts and references shall be available from
the director upon request. Technical information and experience regarding
specific contaminants and control measures may be obtained from the
director.
Notes
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