MSHA has published the proposed silica rule on their website. Among other things, MSHA proposes to set the permissible exposure limit of respirable crystalline silica at 50 micrograms per cubic meter of air (µg/m3) for a full shift exposure, calculated as an 8-hour time-weighted average for all miners.

Partner Brian Hendrix has published an article for Rock Products explaining MSHA’s focus on Power Haulage Safety. Brian examines the best practices provided by MSHA and offers advice to quarry operators looking to develop and implement a mine-specific plan for powered haulage safety.

For more information, read the article here.