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Best Practices for Dust Control in Metal/Nonmetal MiningControlling respirable silica dust in underground stone and metal/nonmetal mines 15. Crushing ... Page. 10. 2-4. Sampling locations used to isolate dust generated at an underground crusher .......11. 2-5. ... which have developed into industry standards, to newer controls, which are still being optimized. The intent is.cab crushing standards mining industrial,Noise Assessment of Stone/Aggregate Mines: Six Case Studies - CDCily th.rQugh ~emaal contacts within ffie mining industry. Standards for Occupational Noise Exposure (Federal. Participation f i e surveys was voluntary for mine. Re&-' .. secondary crusher. Upper level. 97-99 posed to noise, because secondary. Compressor bldg. Inside, door open. 89 the workers are in cabs secondary.Air cleaning performance of a new environmentally controlled .Feb 29, 2016 . A new replacement operator booth was designed and installed by 3M based on design considerations from past NIOSH research on enclosed cab filtration . Control rooms and/or operator booths at metal/non-metal mines and industrial mineral processing plants are other areas where air filtration and.