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Benzo pyrene ambient levels

Certain monitoring data suggest that ambient levels of some PAHs may be decreasing. Faoro and Manning (1981) analyzed a limited sample of U.S. National Air Surveillance Network data updated through 1977. which indicated that benzo[a]pyrene concentrations have shown consistent, sizable declines during the period from 1967 to 1977 at 26 urban sites and 3 background sites studied (data not provided). [Pg.274]

In a 1981-82 study that characterized air levels of 13 PAHs in Los Angeles, Grosjean (1983) reported mean ambient particle-phase PAH concentrations ranging from 0.32 ng/m for benzo[k]fluoranthene to 3.04 ng/m for combined benzo[g.h.i]perylene and indeno[1.2.3-c.d]pyrene. Mean concentrations of anthracene, fluoranthene, pyrene, chrysene. benz[a]anthracene. combined perylene and benzo[e]pyrene, benzojkjfluoranthene. and benzo[a]pyrene were 0.54 0.94, 1.62,... [Pg.274]

See other pages where Benzo pyrene ambient levels is mentioned: [Pg.514]    [Pg.15]    [Pg.1342]    [Pg.1351]    [Pg.452]    [Pg.455]    [Pg.504]    [Pg.507]    [Pg.1342]    [Pg.1351]    [Pg.231]    [Pg.296]    [Pg.301]    [Pg.303]    [Pg.312]    [Pg.346]    [Pg.114]    [Pg.115]    [Pg.646]    [Pg.655]    [Pg.426]    [Pg.105]    [Pg.623]   
See also in sourсe #XX -- [ Pg.455 , Pg.456 , Pg.457 , Pg.458 , Pg.459 , Pg.460 , Pg.466 ]



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