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silica mining for stone industry

OSHA Silica Rule OSHA Releases Final Silica Ruling OSHA released its longanticipated rule reducing the permissible exposure level PEL for crystalline silica for general industry and construction The rule cuts the respirable silica PEL from 100 gm 3 for an 8hour time weighted average to 50 gm 3 The rule was broken into two separate

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