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The Workplace Exposure Standard (WES) is the airborne concentration of respirable crystalline silica (RCS) above which workers must not be exposed, which is currently set at 0.05 mg/m3. Exposure to hazardous levels of dust can be reduced considerably by avoiding dry processes that generate airborne dust like regularly dry cutting, grinding, crushing, drilling, or sweeping materials that contain crystalline silica. However, if tasks are performed that involve exposure to crystalline silica for a very short period over the day it is unlikely that the exposure standard will be exceeded (assuming no exposure for the rest of the shift).
For more information on solutions for silica dust hazards.
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