STEL 09
STEL 09 :
Short Term Exposure Limit. This is a term used by the ACGIH to denote "a 15-minute time-weighted average exposure which should not be exceeded at any time during a work day even if the eight hour time-weighted average is within the TLV". As with the TWA-TLV, the STEL is only a recommendation. Also see: TLV, TWA
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