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Question
29. Consider the following observed concentrations of air contaminants:TWA PEL
Isopropyl ether 200 ppm 500 ppm
Ethyl benzene 40 ppm 100 ppm
Chlorobenzene 25 ppm 75 ppm
Chlorobromomethane 50 ppm 200 ppm
Perform calculations to determine whether this atmosphere exceeds the PEL, the AL, or both.
Answer
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