An airborne concentration of a toxic substance in the work environment, which should never be exceeded.
The maximum concentration of a material in air that should not be exceeded, even instantaneously. (See PEL and TLV ).
the maximum level of exposure to a toxic agent that is allowed at any time.
The maximum concentration of a material in air that must never be exceeded, even for an instant.
Cal/OSHA's legal exposure concentration (Permissible Exposure Limit) that must not be exceeded, even for a moment. Many solvents have ceiling limits.
The maximum concentration to which an unprotected worker may be exposed for even a brief period of time. OSHA has assigned some, but not all, toxic substances with a ceiling limit. Unprotected workers may not enter an environment even momentarily when concentrations of toxic substances exceed the ceiling level.
The maximum allowable human exposure limit for an airborne substance which is not to be exceeded even momentarily. See also PEL and TLV.
A concentration that is not to be exceeded.
The concentration of a substance in air which may not be exceeded at any time during the work period.