Although crystalline silica is a common mineral found in the earth’s crust, common construction operations and cutting or crushing stone could result in unsafe conditions for workers. Industrial grade sand used in certain foundry work and hydraulic fracturing (fracking) is also a source of exposure.
OSHA’s standard (29 CFR 1926.1153) requires employers to limit and protect workers from exposure to respirable crystalline silica during construction, demolition, blasting, and tunneling activities.
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