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Contactengines) where sound levels greater than 90 dB(A) are pres ent. In addition, crushers and screens used in the processing of the sand and gravel also generate sound levels greater than 90 dB(A). Although no surveyed worker exceeded the Mine Safety and Health Administration’s (MSHA’s) permissible exposure level (PEL) of 90 dB(A) eight-hour
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ContactApr 14, 2015Activities during the day at the quarry site were found to have the potential of altering noise levels in the surrounding settlements by 2 dB (A) to 10 dB (A), though the composite noise levels in
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