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OSHA’s new silica rule is meant to protect workers from exposure to respirable crystalline silica (RCS) on jobsites. The Rule 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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