The Occupational Safety and Health Administration's proposed silica safety rule has received about 30 final briefs, which OSHA will review before finishing the final rule. Jackson Morrill of the American Chemistry Council, which submitted a final brief, noted it is "an opportunity to encapsulate our argument within the full set of documents that are in OSHA's docket." OSHA has proposed to cut the exposure limit for general industry by half, to 50 micrograms per cubic meter of air.

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