Quantitative determination of trucking industry workers' exposures to diesel exhaust particles.
Zaebst-DD; Clapp-DE; Blade-LM; Marlow-DA; Steenland-K; Hornung-RW; Scheutzle-D; Butler-J
Am Ind Hyg Assoc J 1991 Dec; 52(12):529-541
Exposures to diesel aerosol were measured among road drivers, local drivers, dock workers, and mechanics as part of a case/control mortality study in the trucking industry. Laboratory and field studies indicated that the elemental carbon content of the particles was a useful and practical marker of exposure to vehicular diesel exhaust. A thermal optical analysis technique was used to determine the concentration of elemental carbon in the filter samples. Overall the geometric mean exposures to submicrometer sized elemental carbon ranged from 3.8 micrograms/cubic meter (microg/m3) in road drivers to 13.8microg/m3 in dock workers. Geometric mean background area concentrations in the same regions where the workers were sampled were 2.5microg/m3 on major highways and 1.1microg/m3 in residential areas. The results indicated that the exposures to dock workers and mechanics were significantly higher than background levels and were significantly higher than exposures in the local and road drivers. The exposure of the truck drivers was not distinguishable from background concentrations on the highways, but was significantly higher than background concentrations in residential areas.
NIOSH-Author; Diesel-exhausts; Aerosols; Automotive-exhausts; Diesel-emissions; Automotive-emissions; Epidemiology; Airborne-particles; Airborne-dusts; Mortality-data
American Industrial Hygiene Association Journal