Action level (AL). An airborne concentration of cadmium of 2.5 micrograms per cubic meter of air (2.5 µg/m3), calculated as an 8-hour time-weighted average (TWA).

Authorized person. Any person authorized by the employer and required by work duties to be present in regulated areas or any person authorized by the WISH Act or regulations issued under it to be in regulated areas.

Director. The director of the department of labor and industries, or authorized representatives.

Employee exposure and similar language referring to the air cadmium level to which an employee is exposed. The exposure to airborne cadmium that would occur if the employee were not using respiratory protective equipment.

Final medical determination. The written medical opinion of the employee's health status by the examining physician under WAC 296-62-07423 (3) through (12) or, if multiple physician review under WAC 296-62-07423(13) or the alternative physician determination under WAC 296-62-07423(14) is invoked, it is the final, written medical finding, recommendation or determination that emerges from that process.

High-efficiency particulate air (HEPA) filter. A filter capable of trapping and retaining at least 99.97 percent of mono-dispersed particles of 0.3 micrometers in diameter.

Regulated area. An area demarcated by the employer where an employee's exposure to airborne concentrations of cadmium exceeds, or can reasonably be expected to exceed the permissible exposure limit (PEL).