Health Assessment Document for Diesel Emissions - NSCEP | US ...

Table 2-14. Mean particle, gas, and overall scavenging ratios for neutral
organic compoundsa
Dominant
Comeound Mean 0b Mean Wu Mean W& Mean W scav: mech. d
Toluene 0.0 0.0 22 ± 5 22 ± 5 g
1 ,2,4-Trimethylbenzene 0.0 ·o.o 27 ± 9 27 ± 9 g
Ethyl benzene 0.0 0.0 27 ± 1 127 ± 11 g
m+p-Xylene 0.0 0.0 33 ± 17 33 ± 17 g
a-Xylene 0.0 0.0 35 ± 15 35 ± 15 g
Naphthalene 0.0 0.0 250 ± 73 250 ± 73 g
2-Me thy !naphthalene 0.0 0.0 250 ± 78 250 ± 78 g
1-Me thy !naphthalene 0.0 0.0 330 ± 100 330 ± 100 g
Diethylphthalate 0.0 NA 20,000 20,000 g
Dibenzofuran 0.008 11,000 930 1,000 g
Fluorene 0.009 15,000 1,500 1,600 g
Phenanthrene + anthracene O.Ql1 17,000 3,300 3,500 g
9-Fluorenone 0.021 15,000 11,000 11,000 g
Methylphenanthrenes . 0.027 13,000 2,500 2,800 g
Fluoranthene 0.053 11,000 6,300 6,600 g
Pyrene 0.071 9,300 5,900 6,100 g
Eicosane 0.14 40,000 NA 5,600 p
9, 10-Anthracenedione 0.21 2,400 27,000 22,000 g
Dioctylphthalate 0.56 36,000 20,000 30,000 p
Docosane 0.61 -27,000 NA 17,000 p
Chrysene 0.71 2,600 18,000 7,000 g
Benz[ a] anthracene 0.75 1,300 12,000 4,000 g
Benzo[ e ]pyrene 0.97 2,000 5,800 2,100 p
Benzo[a]pyrene 0.98 1,700 NA 1,700 p
Benzo[b+ j +k]fluoranthene 0.98 2,200 7,400 2,300 p
Perylene 1.0 1,800 NA 1,800 p
Tricosane J.O 22,000 NA 22,000 p
Tetracosane 1.0 16,000 NA 16,000 p
Benzo[ghz]perylene 1.0 3,100 NA 3,100 p
Coronene 1.0 5,900 NA 5,900 E
'From Ligocki eta!. (1985a,b).
b0 = (aerosol)/(vapor + aerosol).
'W = W 0 0 + Wg(l-0).
•g = Gas; p = Particle.
NA = Not available.
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