Field performance measurements of half-facepiece respirators: steel mill operations.
Am Ind Hyg Assoc J 1998 Nov, 59(11):789-795
Ambient and in-facepiece samples to evaluate the protection provided by negative-pressure, half-facepiece respirators were collected on workers in different areas of a steel mill including a sinter plant and a basic oxygen process shop. Protection was assessed by workplace protection factors (WPF). All the in-facepiece concentrations were dramatically less than the corresponding ambient concentration levels or permissible exposure limits. The geometric mean (GM) ambient and in-facepiece concentrations of iron were found to vary among tasks. Significant differences were also found to occur between the GM ambient exposure levels in which some of the respirators were used. Significant differences in respirator performance as measured by WPF or in-facepiece iron concentration were observed among different brands of respirators. For all job classifications and at all levels of airborne exposure, the fifth percentile estimates for the WPF distributions for each brand of respirator were all greater than 20.
Respirators; Face-masks; Steel-industry; Dust-exposure; Dust-masks; Dust-particles; Dusts; Respirable-dust; Respiration; Dust-sampling; Exposure-levels; Exposure-limits; Iron-compounds; Airborne-dusts; Airborne-particles; Personal-protective-equipment; Protective-equipment
U.S. Department of Health and Human Services, Public Health Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Health Effects Laboratory Division, 1095 Willowdale Road, Morgantown, WV 26505
American Industrial Hygiene Association Journal