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What is the recommended method for sampling a ceiling exposure limit?

April 26, 2017ceiling exposure limit method recommended Sampling

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What is the recommended method for sampling a ceiling exposure limit?

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A chemical having a ceiling limit shall, at no time, exceed the exposure limit given for that substance. Instantaneous monitoring is frequently not feasible. In these cases, the ceiling should be assessed as a 15-minute time weighted average exposure, which shall not be exceeded at any time during the day.