Employers must limit employee exposure to substances listed in OSHA Tables Z-1, Z-2, and Z-3 to specified PELs (8-hour TWA or ceiling values). For multiple substance exposures, cumulative formula applies. Engineering and administrative controls must be used first; respiratory protection is the last resort. Initial exposure monitoring is required to establish baseline for chemicals with PELs.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.