Question: 1. Time-weighted average calculation, from the following table. Substance is isopropanol (formula weight is 60.1 g/mole, OSHA PEL = 400 ppm). Is the average

1. Time-weighted average calculation, from the following table. Substance is isopropanol (formula

1. Time-weighted average calculation, from the following table. Substance is isopropanol (formula weight is 60.1 g/mole, OSHA PEL = 400 ppm). Is the average concentration above the OSHA PEL? Time period Concentration (mg/M) 8:00-9:00 1000 9:00 12:15 1125 - 12:15 3:00 250 3:00-4:00 100 What is the 8-hr TWA of isopropanol, in units of mg/M?

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