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Topic

Safety, Health, and Environment · Question 1

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A. Hazardous materials, hygiene & waste regulation

Personal sampling over an 8-hour shift (PEL $=100$ ppm) records $100$ ppm for 2 h, $150$ ppm for 4 h, $50$ ppm for 2 h. The 8-hour time-weighted average (TWA) exposure is most nearly:

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