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TABLE 17 <br /> ESTIMATION OF AIR CONCENTRATIONS FOR VOCs IN SOILS <br /> FORMER VERNALIS PUMP STATION <br /> Vernalis, San Joaquin and Stanislaus Counties, California <br /> COPC Cs(mg/kg) Ei(mg/sec) Ca(mg/m3) <br /> BTEX <br /> Toluene 3.50E-02 9.6E-05 9.7E-07 <br /> Eth lbenzene 5.00E-03 1.1E-05 1.1E-07 <br /> Xylene(s) 4.20E-01 9.3E-04 9.4E-06 <br /> PAHs <br /> Acenaphthene 5.00E-03 1.0E-06 1.0E-08 <br /> Benzo(a)anthracene 5.70E-02 NA NA <br /> Benzo(a)pyrene 8.10E-03 NA NA <br /> Benzo b fluoranthene 8.30E-03 NA NA <br /> Benzo ,h,i e lene 1.10E-02 NA NA <br /> Benzo k fluoranthene 5.00E-03 NA NA <br /> Chrysene 8.60E-02 NA NA <br /> Dibenz a,h anthracene 5.00E-03 NA NA <br /> Fluoranthene 3.60E-02 NA NA <br /> Fluorene 5.00E-03 1.8E-07 1.8E-09 <br /> Indeno 1,2,3-cd rene 8.00E-03 NA NA <br /> Naphthalene 1.10E+00 2.9E-04 2.9E-06 <br /> Phenanthrene 7.60E-01 NA NA <br /> Pyrene 5.90E-02 NA NA <br /> Equation: <br /> Ca=Ei/99 <br /> Where: <br /> Ca=ambient air concentration,mg/m3 <br /> Cs=concentration is soil,mg/kg <br /> Ei=total emission rate for compound i,mg/sec <br /> Abbreviations: <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> COPC=Constituent of potential concern <br /> mg/kg=Milligrams per kilogram <br /> mg/m3=Milligrams per cubic meter <br /> mg/sec=Milligrams per second <br /> NA=Not applicable because chemical is considered non-volatile(PEA Manual) <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> PEA=Preliminary Endangerment Assessment <br /> VOCs=Volatile organic compounds <br /> Equation Source: <br /> PEA Manual,Figure 2.7. <br /> The Benham Compa n ies,LLC <br /> A Wholly Owned Subsidiary <br /> Page 1 of 1 from svenco to soluhons <br />