Characterization of diesel aerosols in an underground metal mine.
Proceedings of the Eighth International ETH-Conference on Nanoparticle Measurement, Zurich, Switzerland, August 16-18, 2004. Mayer A, ed., Zurich, Switzerland: ETH Zürich (Swiss Federal Institute of Technology), 2004 Oct; :1-2
Approximately 13,000 underground coal and 7,500 underground metal/nonmetal miners in the United States are exposed to concentrations of diesel particulate matter (DPM) that significantly exceed those of any other occupation. In January 2001, the Mine Safety and Health Administration set interim limits for exposure of metal and nonmetal underground miners to DPM--400 milligrams per cubic meter of total carbon [30 CFR 57.5060 (2001)]. The total carbon standard was amended later with an equivalent elemental carbon standard--308 milligrams per cubic meter [68 Fed. Reg. 48668 (2003)]. Controlling DPM emissions at their source using diesel particulate filter (DPF) systems and other advanced diesel emission control technologies was considered to be one of the potential solutions to the problem, but the rather limited knowledge of the performance of these technologies in the underground environment significantly held up the wider acceptance and implementation of these technologies. NIOSH conducted a study in an underground metal mine to determine the in situ effectiveness of selected control technologies in reducing particulate matter and gaseous emissions from diesel-powered equipment and to characterize aerosols in the mine air. The primary objective was to evaluate the effects of the DPF systems and different fuel formulations on (1) the mass concentrations of elemental carbon particles under 800 nm, (2) the mass concentrations of total particulate matter under 800 nm, and (3) the number concentration and size distribution of aerosols between 10 and 392 nm.
Diesel-emissions; Underground-mining; Metal-mining; Aerosols; Occupational-health; Particulates
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Research Tools and Approaches: Control Technology and Personal Protective Equipment
Proceedings of the Eighth International ETH-Conference on Nanoparticle Measurement, Zurich, Switzerland, August 16-18, 2004