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Technical Assistance Report No. TA-80-111, State of Washington and Region X Office of the Department of Health and Human Services.
Morgantown, WV: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, TA 80-111, 1980 Jan; :1-17
Bulk and personal air samples from the Sunnyside, Washington, area (SIC-9431) were analyzed for hazardous concentrations of respirable dust, total dust, and respirable free silica (7631869) due to volcanic ash from Mount St. Helens on June 19 to 26, 1980. The evaluation was requested by state and federal government officials on behalf of an unspecified number of outdoor agricultural workers. All personal exposures were well below the OSHA standard of 10 milligrams per cubic meter (mg/CuM) for respirable dust containing quartz, and the NIOSH criteria of 0.05mg/CuM for respirable free silica. Average exposures were low, except for total dust exposure in onion fields near Moses Lake. The higher Moses Lake exposures were attributed to the small sample size or sample contamination. Bulk and personal samples did not contain significant concentrations of toxic metals. The investigators concluded that workers in the Sunnyside area were not overexposed to respirable dust, total dust, or respirable free silica at the time of the survey. Recommendations are given for monitoring and respiratory protection in the event of future volcanic eruptions or excessively dusty conditions.
NIOSH-Author; NIOSH-Technical-Assistance-Report; TA-80-111; Hazards-Unconfirmed; Region-10; Air-sampling; Silicates; Air-contamination; Combustion-products; Agricultural-workers; Dust-exposure; Dust-analysis
Field Studies; Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division