The Mine Safety and Health Administration (MSHA) has issued a final rule to better protect the nation’s miners from health hazards associated with exposure to respirable crystalline silica. It lowers the permissible exposure limit to 50 micrograms per cubic meter of air for a full-shift exposure, calculated as an eight-hour, time-weighted average. If a miner’s exposure exceeds the limit, the…
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MSHA’s silica proposal released
The U.S. Department of Labor announced a proposal by its Mine Safety and Health Administration (MSHA) to amend current federal standards to “better protect the nation’s miners from health hazards related to exposure to respirable crystalline silica, or silica dust.” The proposed rule change will ensure miners have at least the same level of protections as workers in other industries. “Unhealthy levels…
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