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Health hazard evaluation report: HETA-81-388-1129, Santa Cruz Metropolitan Transit District, Santa Cruz, California.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HETA 81-388-1129, 1982 Jun; :1-18
Exposures to diesel and gasoline exhaust fumes were investigated on August 19 and 20, 1981. The survey was requested by the vehicle maintenance supervisor for the Santa Cruz Metropolitan Transit District (SIC-4172). Fourteen workers are employed in vehicle maintenance. They reported dizziness, headaches and nausea. During diesel servicing, carbon-monoxide (630080) (CO) concentrations peaked at 8 parts per million (ppm), well below the NIOSH criteria of 35ppm. Carbon-dioxide (124389), nitrogen-dioxide (10102440), and sulfur-dioxide (7446095) were either below detection limits or barely detectable. Total particulate concentrations peaked at 1.12 milligrams per cubic meter (mg/m3) (the NIOSH criteria for nuisance dust is 10mg/m3). Formaldehyde (50000) concentrations peaked at 1.4ppm. During gasoline bus startup, peak CO concentrations did not exceed the NIOSH recommended time weighted average of 35ppm. Reported symptoms were consistent with exposure to diesel and gasoline fume exhaust, and formaldehyde exposure. The authors conclude that workers were not overexposed to airborne pollutants except formaldehyde. Significant short term exposure to formaldehyde occurred depending on job task, the time of the shift, and the mechanical condition of the bus. The authors recommend various steps to reduce diesel exhaust fume exposure.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; Hazards-Unconfirmed; Occupational-exposure; Chronic-exposure; Diesel-exhausts; Transportation-workers; HETA-81-388-1129; NIOSH-Technical-Assistance-Report; Author Keywords: Maintenance and Service Facilities for Motor Vehicle Passenger Transportation; Diesel and Gasoline Fume; Carbon Monoxide; Carbon Dioxide; Nitrogen Dioxide; Sulfur Dioxide; Total Particulate; Soot; Formaldehyde
630-08-0; 124-38-9; 10102-44-0; 7446-09-5; 50-00-0
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division