Section R. 325.2402 - General definitionsRule 2. As used in these rules:
(a) "Aerosol" means particulate matter suspended in air.(b) "Contaminant" means an airborne material capable of causing occupational disease or significant physiological disturbances to a person, and includes, but is not limited to, the substances listed in R 325.2413 to R 325.2419.(c) "Director" means the director of the department of consumer and industry services or the designee of the director.(d) "Employer" means an individual or type of organization which has in its employ 1 or more individuals performing services for it.(e) "Gas" means a normally formless fluid which occupies a space or enclosure and which can be changed to the liquid or solid state by the effect of increased pressure or decreased temperature, or both.(f) "Inert gas" means a gas or vapor which acts primarily as a simple asphyxiant without other significant physiological effect, recognizing that an inert gas may have flammable or explosive characteristics.(g) "Inert particulate" means an aerosol which does not produce significant organic disease or toxic effect in a lung-tissue reaction from any of the following: (i) The architecture of the air spaces remains intact.(ii) Collagen (scar tissue) is not formed to a significant extent.(iii) The tissue reaction is potentially reversible.(h) "Particulate matter" means fine solid or liquid particles.(i) "Physical agent" means a form of energy transmitted directly or through the air from the point of emission to the receiver.(j) "Vapor" means the gaseous state of a substance.Mich. Admin. Code R. 325.2402