CARBON MONOXIDE IN THE WORKPLACE
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365-BSA-01-IMOT © 2024, Workplace Safety & Prevention Services (WSPS)
1 877 494 WSPS (9777) | 905 614 1400 | WSPS.CA
Controlling process emissions depends on maintaining performance standards. The most efficient means
to achieve this is a program of regularly scheduled maintenance that includes documented procedures
and performance records. This permits prompt diagnosis of problems prior to breakdown of equipment.
The ventilation system plays an essential role in controlling exposure to carbon monoxide. For this
reason, repairs to this equipment should be carried out when carbon monoxide is not being used or
generated (i.e., during off-shifts and weekends, if possible).
Exposure of maintenance workers must be considered. Exposure may arise from solvent or gases
trapped in equipment under repair, or from emissions produced by equipment operating nearby. Written
procedures that identify the appropriate protective equipment are necessary.
Controls at the Worker
Respiratory protection
Carbon monoxide provides no warning of its presence or concentration. This limits the selection of
respiratory protection. For example, the use of a chemical cartridge respirator is NOT recommended
because there is no way of knowing when the cartridge is saturated. Canister-type respirators (gas
masks) are permitted in some areas but are NOT recommended for the same reason. Those which are
recommended are supplied air respirators, including:
self contained breathing apparatus
airline respirators
Figure 4: Self Contained Breathing Apparatus
Figure 5: An Airline Respirator
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