A load used in durability calculations accounting for both maximum and minimum loads
Maximum exposure limit. the maximum concentration of an airborne substance, averaged over a reference period, which people at work can be exposed to, under any circumstances. The MEL (for each substance which has been assigned one) is given, together with the appropriate reference periods, in Schedule 1 of the COSHH Regulations.
the maximum permitted concentration of a chemical to which a worker may be exposed over an extended period of time. Typically, MELs are quoted in ppm for an 8-hour reference period, though shorter periods may be quoted for some materials. MELs are, in many countries, enforceable by law. A list of chemicals for which MELs are defined in the UK is held at http://physchem.ox.ac.uk/MSDS/mels.html
maximum exposure limit. Occupational exposure limit legally defined in GB under COSHH as the maximum concentration of an airborne substance, averaged over a reference period, to which employees may be exposed by inhalation under any circumstances, and set on the advice of the HSC Advisory Committee on Toxic Substances RT ceiling value
Maximum Exposure Limit; the maximum permitted concentration of a chemical to which a worker may be exposed over an extended period of time.