MSHA is extending the comment period for its request for information on the exposure of underground miners to diesel exhaust. In response to requests from the public, the agency will now accept comments on the RFI through Sept. 25, 2020. The RFI, which was published in June 2016, seeks information and data on approaches to control and monitor underground miners’ exposures to diesel exhaust; non-permissible, light-duty, diesel-powered equipment in underground coal mines; the maintenance of diesel-powered equipment in underground coal mines; recordkeeping requirements; and more. See the new Federal Register notice for details and instructions on submitting comments. The comment period for the RFI originally closed on Nov. 30, 2016, after which MSHA and NIOSH convened a “Diesel Exhaust Health Effects Partnership” with the mining industry, diesel engine manufacturers, academia, and representatives of organized labor. MSHA’s latest extension of the comment period is intended to provide stakeholders an opportunity to review and comment on information presented at upcoming meetings of the Partnership. More information about the RFI is available on MSHA’s website.