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Recommended Exposure Limits (REL).
Encyclopedia of toxicology, second edition. Wexler P, Anderson BD, De Peyster A, Gad SC, eds. San Diego, CA: Academic Press, 2005 Mar; :621-622
Recommended exposure limit (REL) is the name used by the US National Institute for Occupational Safety and Health (NIOSH) for the occupational exposure limits (OELs) it recommends to protect workers from hazardous substances and conditions in the workplace. RELs are not regulations. While they are intended primarily as recommendations to the US Occupational Safety and Health Administration (OSHA) and the Mine Safety and Health Administration (MSHA) for use in promulgating legal standards, they also may help employers, workers, and health professionals to recognize and control occupational hazards. Most RELs have been developed for chemical air contaminants, usually represented as numerical values for airborne concentrations (expressed as ppm, mg m-3, or fibers cm-3). However, NIOSH has developed RELs for other hazards, including physical agents such as noise, heat, and ultraviolet radiation. Like other OELs, NIOSH expresses most RELs as time-weighted average (TWA) exposures, for up to 10 h day -1 during a 40 h workweek.
Exposure-assessment; Exposure-levels; Exposure-limits; Permissible-concentration-limits; Permissible-limits; Occupational-exposure; Employee-exposure; Time-weighted-average-exposure; Work-intervals; Safety-measures; Hazardous-materials; Health-hazards; Industrial-exposures; Air-contamination; Short-term-exposure; Occupational-hazards; Control-methods
Wexler-P; Anderson-BD; De Peyster-A; Gad-SC
Encyclopedia of toxicology, second edition
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division