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Health hazard evaluation report: HETA-81-452-1128, 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 81-452-1128, 1982 Jun; :1-17
Exposures to fuel and exhaust fumes were investigated. The General Manager for Santa Cruz Metropolitan Transit District (SIC-4111) requested the investigation which was performed on September 23 to 25, 1981. The manager was concerned about complaints of eye and upper respiratory irritation reported by about 25 bus drivers. Peak carbon-monoxide (630080) concentrations for gasoline powered buses averaged 6 parts per million (ppm) and peak total hydrocarbons average 3ppm. The NIOSH standards are 35ppm for carbon-monoxide and 350 milligram per cubic meter for alkanes C5 to C8. For diesel engine buses, carbon-dioxide (124389), nitrogen-dioxides (10102440), and sulfur-dioxides (7446095) concentrations were below the limit of the detection. No formaldehyde (50000) was detected. Total soot ranged from none detectable to 0.06 milligrams per cubic meter. For 17 bus drivers, there was no significant difference between preshift and postshift carboxyhemoglobin concentration. The authors conclude that drivers were not overexposed to raw fuel and exhaust fume pollutants. Symptoms reported by the drivers were consistent with either intermittent diesel fume exposure or intermittent uncombusted gasoline vapor exposure.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; Hazards-Unconfirmed; Occupational-exposure; Chronic-exposure; Diesel-exhausts; Transportation-workers; HETA-81-452-1128; NIOSH-Technical-Assistance-Report; Author Keywords: Local and Surburban Transit; Diesel and Gasoline Exhaust Fumes; Raw Gas Odor; Carbon Monoxide; Carbon Dioxide; Nitrogen Dioxide; Sulfur Dioxide; 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: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division