PERMISSIBLE EXPOSURE LIMIT. A measure of an acceptable limit of exposure for human beings as defined by the Occupational Safety and Health Administration (OSHA).
Permissible Exposure Limit. An exposure limit established and enforced by the Occupational Safety and Health Administration (OSHA) which may be expressed as a time-weighted average (TWA) limit, short term exposure limit (STEL) or ceiling exposure limit (C).
Permissible exposure limit. The maximum concentration of a toxic substance in the workplace that should never be exceeded during an eight-hour work shift, as determined by averaging the exposures measured throughout eight hours.