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TABLE 21 <br /> ESTIMATION OF AIR CONCENTRATIONS FOR VOCS IN SOILS <br /> SURLAND HOMES—BRIDLE CREEK <br /> Tracy, California <br /> ' Constituent in Soil Cs(mg/kg) Ei(m sec) Ca(mgtm3) <br /> BTEX <br /> Toluene 0.028 7.6E-05 7.7E-07 <br /> Eth lbenzene 1.5 3.2E-03 3.3E-05 <br /> Xylene(s) 1.5 3.3E-03 3.3E-05 <br /> PAHs <br /> Acenaphthene 0.17 3.5E-05 3.5E-07 <br /> Anthracene 0.090 I.SE-06 1.8E-08 <br /> Benzo(a)anthracene 0.032 NA NA <br /> Benzo(a)pyrene 0.0046 NA NA <br /> Benzo b fluoranthene 0.024 NA NA <br /> Benzo( ,h,i)per leve 0.040 NA NA <br /> Chr sene 0.081 NA NA <br /> Dibenz(a,h)anthracene 0.0068 NA NA <br /> FIuoranthene 0.027 NA NA <br /> Fluorene 0.48 1.7E-05 1.7E-07 <br /> ' <br /> Naphthalene 0.36 9.5E-05 9.6E-07 <br /> Phenanthrene 1.8 NA NA <br /> Pyrene 0.074 NA NA <br /> METALS <br /> Barium 211 NA NA <br /> Beryllium 0.82 NA NA <br /> Chromium Trivalent 43.7 NA NA <br /> ' Cobalt 12.0 NA NA <br /> Copper 103 NA NA <br /> Lead 16.3 NA NA <br /> Mercury 0.019 NA NA <br /> Molybdenum 0.71 NA NA <br /> Nickel 39.1 NA NA <br /> Vanadium 76.4 NA NA <br /> Zinc 84.6 NA NA <br /> ' Equation: <br /> Ca=Ei 199 <br /> Where: <br /> ' Ca=ambient air concentration, mg/m3 <br /> Ei=total emission rate for compound i (mg/second); <br /> 1 Abbreviations: <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <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 <br /> (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. ffAROW <br /> SAIL. <br /> ' Page 1 of 1 From Science to Solutions <br />