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Since the NIOSH recommended exposure limit for respirable crystalline silica was The exposure of only groundsmen exceeded 90 dBA, although crusher concentration was 0.10 mg/m3, with 71% exceeding the threshold limit value.
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Oct 31, 2018 Exposures to respirable crystalline silica (RCS) and respirable dust at demolition and crushing sites (n = 20) with a median value of 11.5%.
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