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Dust Exposure Of Stone Grindingmill Coal Russian

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Dust Exposure Of Stone Grindingmill Coal Russian

Aug 29, 1996 Recognizing that 26.9 percent of MSHA samples of mine air for respirable dust in 1991 exceeded the permissible exposure limit (PEL) and that this exposure limit is twice the value recommended by NIOSH (100 v. 50 micrograms per cubic meter);(5) and Acknowledging that silicosis is entirely preventable with known, effective, and conventional

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