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Concrete Crushers Levels

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Chipping crushing exposes construction workers to high Jan 30 2019018332Workers performing concrete chipping at substructure bridge repair sites had the highest level of respirable crystalline silica exposure a time weighted average of 527 micrograms per cubic meter of air That is more than 10 times the PEL of 50 micrograms per cubic meter that OSHA established in its most recent silica regulation 1926 1153

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