Lowering Miners' Exposure to Respirable Crystalline Silica and Improving Respiratory Protection

MSHA strengthened occupational safety standards for miners exposed to respirable crystalline silica, including new exposure limits, respiratory protection requirements, and medical surveillance—not directly relevant to semiconductor supply chain materials or controls.

Primary source: https://www.federalregister.gov/documents/2024/04/18/2024-06920/lowering-miners-exposure-to-respirable-crystalline-silica-and-improving-respiratory-protection