Based on the CO production rates shown above the TWA would be exceeded in a 100 x 100 x 10 foot
(empty) space after 3 hours with 2 air changes per hour. (Assumes no additional CO exposure during 8
hour time period)
The Graph above depicts the relationships of air exchange to time and CO ppm with cubic feet area and
percent CO emissions remaining constant.
Based on the CO production rates shown above the TWA would be exceeded in a 100 x 500 x 10 foot
(empty) space after 6 hours with 2 air changes per hour. (Assumes no additional CO exposure during 8
hour time period).
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