['Toxic and Hazardous Substances - OSHA']
['Crystalline Silica']
02/18/2025
...
The employer must establish a regulated area wherever an employee’s exposure to airborne concentrations of respirable crystalline silica is, or can reasonably be expected to be, in excess of the permissible exposure limit (PEL).
The PEL is an airborne concentration of respirable crystalline silica in excess of 50 μg/m3, calculated as an 8-hour TWA.
['Toxic and Hazardous Substances - OSHA']
['Crystalline Silica']
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