A worker is exposed to 10 ppm of toluene for 1 hour to 50


A worker is exposed to 10 ppm of toluene for 1 hour, to 50 ppm for 1 hour and to 2 ppm for the remainder of the 8-hour shift. What is the TWA exposure?

A. 3

B. 12

C. 9

D. 8

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Chemistry: A worker is exposed to 10 ppm of toluene for 1 hour to 50
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