Definition(s)
Short term exposure limit (STEL)
A 15-minute TWA exposure that should not be exceeded at any time during a workday.
Source: API RP 49, Recommended Practice for Drilling and Well Servicing Operations Involving Hydrogen Sulfide, Third Edition, May 2001. Global Standards
STEL
short-term exposure limit.
Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards
STEL
Fifteen-minute TWA exposure limit that shall not be exceeded at any time during a workday unless another time limit is established.
Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards