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The PEL for toluene is 200 ppm, the REL is 100 ppm, and TLV is set to 50 ppm. What is the action level (one-half

The PEL for toluene is 200 ppm, the REL is 100 ppm, and TLV is set to 50 ppm. What is the action level (one-half of the TLV) for toluene? (A): 25ppm (B): 50ppm (C): 100ppm (D): All of the above

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