['Toxic and Hazardous Substances - OSHA']

['Crystalline Silica']

09/10/2025

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Toxic and Hazardous Substances - OSHA - Crystalline Silica
FAQ

FAQ

When working with crystalline silica, when do I need to establish a regulated area?

RegSense Crystalline Silica Safety & Health General Industry Safety Best Results FAQ English Focus Area Toxic and Hazardous Substances - OSHA USA

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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