Short-term exposure limit


A short-term exposure limit is the acceptable average exposure over a short period of time, usually 15 minutes as long as the time-weighted average is not exceeded.
STEL is a term used in exposure assessment, occupational health, industrial hygiene and toxicology. The STEL may be a legal limit in the United States for exposure of an employee to a chemical substance. The Occupational Safety and Health Administration has set OSHA-STELs for 1,3-butadiene, benzene and ethylene oxide. For chemicals, STEL assessments are usually done for 15 minutes and expressed in parts [per million], or sometimes in milligrams per cubic meter.
The American Conference of Governmental Industrial Hygienists publishes a more extensive list of STELs as threshold limit values.

Similar national exposure limits