A. Non-Permissible, Light-Duty, Diesel-Powered Equipment . - MSHAExposure of Underground Miners to Diesel Exhaust. (81 FR 36826). Comment Summary. 1. 3/31/17. A. Non-Permissible, Light-Duty, Diesel-Powered Equipment in. Underground Coal Mines. General comments on light-duty, diesel equipment: a) One commenter stated that MSHA's existing standards for light-duty equipment.coal mine deisel equipment,Proceedings of a workshop on the use of diesel equipment in . - CDCThis document is the proceedings of a workshop sponsored by the. National Institute for Occupational Safety and Health (NIOSH) to explore the health and safety issues associated with using diesel equipment in underground coal mining. The workshop held was held in Morgantown, West ia, on. September 19-22.