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  • Title: Exposure to benzene, toluene, xylenes and total hydrocarbons among snowmobile drivers in Sweden.
    Author: Eriksson K, Tjärner D, Marqvardsen I, Järvholm B.
    Journal: Chemosphere; 2003 Mar; 50(10):1343-7. PubMed ID: 12586165.
    Abstract:
    The exposure to benzene, toluene, xylenes and total hydrocarbons among 25 individuals exposed to exhaust from a snowmobile equipped with a two-stroke engine has been evaluated. Sampling was performed by pumped and diffusive sampling in parallel. There was a relatively bad agreement between the two air-sampling methods. The bad agreement can in part be explained by back diffusion of the substances from the samplers, a high face velocity, and deposition of droplets of unburned gasoline onto or in the vicinity of the samplers. The levels of benzene ranged from not detectable (< or =0.01 mgm(-3)) to 2.5 mgm(-3). For toluene, xylenes and total hydrocarbons the exposure was 0.10-12.0, < or =0.05-13.0 and 0.90-273 mgm(-3) respectively. The result from two measurements on individuals travelling on an open sleigh at the rear of the vehicle indicated higher levels of benzene, 0.7-0.8 mgm(-3). Children are often riding as a passenger on a sledge and may thus have a higher exposure than their parents. This study indicates that spare time driving a snowmobile may cause a considerable exposure to benzene. Using a four-stroke engine equipped with a catalyst could reduce the exposure. To reduce the exposure for the passenger on a sleigh an extension of the exhaust pipe may be effective.
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