Short-Term Exposure Limit (STEL) 5
Short-Term Exposure Limit (STEL) 5 : An airborne exposure limit designed to address short-term upward deviations in exposure. Typically, exposures at the STEL should not be longer than 15 minutes and should not occur more than 4 times per day, and at least 60 minutes should elapse between successive exposures in this range
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