For extended work shifts all eight-hour PEL's shall be time-weighted to adjust for additional worker exposure during extended work
shifts.
(1) If indoor air monitoring indicates over-exposure to
contaminant PEL's, engineering controls shall be utilized to
reduce fire fighter exposure to the lowest feasible level.
(2) All fixed internal combustion equipment such as, but not
limited to emergency generators, shall be effectively exhausted
to the exterior of the fire stations.
(3) All facilities dedicated to the maintenance and repair
of internal combustion equipment shall have means for effective
ventilation to the exterior of the building.
(4) All fire stations built after January 1, 1997, shall be
designed and constructed to conform to ACGIH ventilation
recommended criteria for exhaust of internal combustion engines.
Additional reference: Industrial Ventilation Manual of
Recommended Practices ISBN No.: 0-936712-65-1.