Sources: OSHA, CP staff
The Notice of Proposed Rulemaking for Occupational Exposure to Respirable Crystalline Silica (NPRM) profiles 11 ready mixed and manufactured concrete production job titles, estimating at least half of workers with three of them encounter silica exposure above the agency’s new 50 microgram per cubic meter of air over eight-hour sampling period (50 μg/m3).
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