Launch of Enforcement of the Respirable Crystalline Silica in Construction Standard, 29 CFR § 1926.1153

The Respirable Crystalline Silica construction standard, 29 CFR § 1926.1153, becomes enforceable on September 23, 2017. The standard establishes a new 8-hour time-weighted average (TWA) Permissible Exposure Limit (PEL) of 50 µg/m³, an action level (AL) of 25 µg/m³, and a host of ancillary requirements.

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