A short-term exposure limit (STEL) 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 (U.S. OSHA) has set OSHA-STELs for 1,3-butadiene,[1] benzene[2] and ethylene oxide.[3] For chemicals, STEL assessments are usually done for 15 minutes and expressed in parts per million (ppm), or sometimes in milligrams per cubic meter (mg/m3).[4]
The American Conference of Governmental Industrial Hygienists publishes a more extensive list of STELs as threshold limit values (TLV-STEL).[5]
Similar national exposure limits
[edit]- United Kingdom
- Australia
- OES Occupational Exposure Standard[8]
- France
- Netherlands
- Malaysia
- PEL (Permissible Exposure Limits)
- Poland
- Russia
See also
[edit]Notes
[edit]- ^ 29CFR1910.1051
- ^ 29CFR1910.1028
- ^ 29CFR1910.1047
- ^ "Coshh Assessment Guide". Sunday, March 15, 2020
- ^ American Conference of Governmental Industrial Hygienists
- ^ "Workplace exposure limits".
- ^ "EH40/2005 Workplace exposure limits".
- ^ OES Occupational Exposure Standard Archived 2011-09-05 at the Wayback Machine
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction