In the summer of 1997, nonmethylene hydrocarbon (NMHC) concentrations on roadways were measured for three weeks in South California Air Basin (SoCAB). A clean air vehicle which met the Ultra-Low-Emission-Vehicle (ULEV) standards was used, and samplers were located on the vehicle, at the intake duct and at the tail pipe. NMHC concentrations measured on roadways exhibit a maximum 2.44 ppm. Measurements of roadway NMHC concentrations using a clean air vehicle in SoCAB showed that the concentration of hydrocarbon emitted from the vehicle is less than the ambient concentration taken into the vehicle over a wide range of areas especially in the areas where higher ambient concentration is observed.


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    Title :

    Exposure of clean air vehicles to roadway NMHC concentrations in South California Air Basin


    Contributors:
    Yamamoto, Y. (author) / Hatcho, S. (author) / Hayashi, T. (author) / Myers, T.C. (author) / Whitten, G.Z. (author)


    Publication date :

    1998


    Size :

    Seiten


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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