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1 <br /> TABLE 18 <br /> 1 ESTIMATION OF AIR CONCENTRATIONS FOR VOCs IN SOILS <br /> US CAN-WELTY ROAD <br /> 35275 Welty Road <br /> Vernalis,California <br /> COPC Cs(mg/kg) Ei(m /sec) Ca(mg/m) <br /> I BTEX <br /> Benzene 0.0050 1.6E-06 1.6E-08 <br /> Toluene 0.033 7.3E-06 7.4E-08 <br /> Eth lbenzene 3.3 4.3E-04 4.4E-06 <br /> Total Xylenes 9.5 1.1 E-03 1.1E-05 <br /> PAHs <br /> Acenaphthene 0.00067 4.6E-08 4.7E-10 <br /> Anthracene 0.11 2.0E-06 2.0E-08 <br /> Benzo(a)anthracene 0.0061 NA NA <br /> Benzo(a)pyrene 0.0063 NA NA <br /> ' Benzo b fluoranthene 0.013 NA NA <br /> Benzo(g,h,i)perylene 0.0018 NA NA <br /> Benzo k fluoranthene 0.00067 NA NA <br /> ' <br /> Chrysene 0.44 NA NA <br /> Dibenz a,h anthracene 0.00067 NA NA <br /> Fluoranthene 0.65 NA NA <br /> Fluorene 0.6 2.1 E-05 2.1E-07 <br /> ' Indeno 1 2,3-c d ene 0.00067 NA NA <br /> Naphthalene 3.6 7.5E-04 7.6E-06 <br /> Phenanthrene 2.3 NA NA <br /> ' Pyrene 0.067 NA NA <br /> Equation: <br /> ' Ca=Ei/99 <br /> Where: <br /> Ca=ambient air concentration,mg/m3 <br /> Ei=total emission rate for compound i,mg/second <br /> Abbreviations: <br /> ' BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> COPC=Constituent of potential concern <br /> mg/kg=Milligram per kilogram <br /> ' mg/m3=Milligram per cubic meter <br /> mg/sec=Milligram per second <br /> NA=Not applicable because chemical is considered non-volatile(PEA Manual) <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> I PEA=Preliminary Endangerment Assessment <br /> VOCs=Volatile organic compounds <br /> Equation Source: <br /> ' PEA Manual,Figure 2.7. <br /> 1 <br /> Page 1 of 1 SAIE <br />