The state has adopted the federal requirements for computing permissible exposure limits (PELs) for air contaminants, and adopted its own PELs for certain contaminants that are stricter than the federal PELs.
See Forms in this section for a copy of the Michigan PEL tables.
The Michigan Department of Labor and Economic Growth (DLEG)/Occupational Safety and Health Administration (MIOSHA) administers and enforces safety and health standards for private and public sector workplaces in the state.
MAC r. 325.51101 to 325.51108
PEL tables. The state has adopted the federal requirements for computing PELs and adopted its own PELs for certain air contaminants (see Tables G-1-A and G-2) that are stricter than the federal PELs (see 29 CFR 1910.1000, Z tables).
Federal OSHA had revised its Z tables of hazardous substances and PELs in the 1980s to include the substances adopted by Michigan, but in 1989 a federal circuit court struck down the OSHA revisions. Several states, including California, Washington, Minnesota, Michigan, and Oregon, retained the 1989 version of the federal Z tables.
Skin exposure. To prevent or reduce skin absorption, an employee's skin exposure to substances listed in table G-1-A with an "X" in the skin designation column following the substance name must be prevented or reduced to the extent necessary through the use of gloves, coveralls, goggles, or other appropriate personal protective equipment, engineering controls, or work practices.
Additional exposure limit considerations. An employee must not be exposed to air concentrations between the time-weighted average (TWA) and short-term exposure limit (STEL) more than 4 times in a work shift, and such exposures ...