SAFETY

MSHA rules to lower respirable silica exposure limits

Coal mines will have 12 months to adapt to the new rules, while MNM mines have double the time

Silica hazard chemical warning sign. Photo: Gobigo / Shutterstock

Silica hazard chemical warning sign. Photo: Gobigo / Shutterstock

America's Mine Safety and Health Administration (MSHA) has finalised a rule to reduce miners' exposure to respirable crystalline silica, a known carcinogen, and improve overall respiratory protection. ...

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