What is the twa exposure, A worker is exposed to 10 ppm of

What is the twa exposure

Reference no: EM131008379

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

Reference no: EM131008379

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