Subject: Process Safet Management

Topic: Industrial Hygiene

01) [40 pts The data below shows the exposure duration to methyl acetate vapor in a process plant for a typical work shift: The TLV-TWA for methyl acetate is 200 ppm. Time (min) Chlorobenzene (ppm) 119 89.89 107 84.54 132 45.83 46 87.65 a) Calculate the time-weighted average concentration based on the data given. [15 pts) b) Comment on the result obtained in part (a). [10 pts] c) Explain the effect of a chemical's toxicity, exposure time, and exposure concentration on its TLV-TWA. [15 pts)