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Found Short term exposure limit 1 time.

Displaying results 1 to 10.

1. Short term exposure limit (STEL)
According to American Conference of Governmental Hygienists, this is the time weighted average (TWA) airborne concentration to which workers may be exposed for periods up to 15 minutes, with no more than 4 such excursions per day and at least 60 minutes between them. See time weighted average .