Carbon Monoxide (CO) (cont’d)

• PEL = 50 ppm

• TLV/TWA = 25 ppm

• TLV/REL = 35 ppm

• TLV/STEL = 200 ppm

• IDLH = 1,500 ppm

• BEI: 3.5% COHb; 20 ppm (end-exhaled air)

• LEL = 12.5%; UEL = 74.2%

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