Question: did i do the math here correctly? A workplace exposure is measured at 360 ppm acrylonitrile. (2 pt) What is the OSHA 8-hour PEL for

did i do the math here correctly?

A workplace exposure is measured at 360 ppm acrylonitrile. (2 pt) What is the OSHA 8-hour PEL for acrylonitrile? 40ppm (4 pts) What is the protection factor that is needed to protect the worker such that the concentration inside the respirator is reduced to at least the OSHA PEL? (Show your work) 360/40=9ppm (4 pts) What is the minimum type of respirator that will provide that kind of protection? A half mask

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