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TABLE 9 <br /> INHALATION CANCER RISKS (RESIDENTIAL SCENARIO) <br /> SURLAND HOMES-BRIDLE CREEK <br /> Tracy, California <br /> Constituent in Soil Cs(mg/kg) Cair (mg/m3) <br /> BTEX SFi Inhalation Risk <br /> Toluene 0.028 7.7E-07 NA NA <br /> Eth lbenzene 1.5 3.3E-05 8.7E-03 4.2E-08 <br /> ' Xylene(s) 1.5 3.3E-05 NA NA <br /> PAHs <br /> Acenaphthene 0.17 3.5E-07 NA NA <br /> ' Anthracene 0.090 1.8E-08 NA NA <br /> Benzo(a)anthracene 0.032 1.6E-09 3.9E-Ol 9.3E-11 <br /> Benzo(a)pyrene 0.0046 2.3E-10 3.9E+00 1.3E-10 <br /> ' Benzo(b)fluoranthene 0.024 1.2E-09 3.9E-01 7.0E-11 <br /> Benzo( ,h,i) a lene 0.040 2.0E-09 NA NA <br /> ChEZsene 0.081 4.1E-09 3.9E-02 2.4E-11 <br /> Dibenz(a,h)anthracene 0.0068 3.4E-10 4.1E+00 2.1E-10 <br /> Fluoranthene 0.027 1.3E-09 NA NA <br /> Fluorene 0.48 1.7E-07 NA NA <br /> Naphthalene 0.36 9.6E-07 1.2E-01 1.7E-08 <br /> ' Phenanthrene 1.8 9.0E-08 NA NA <br /> Pyrene 0.074 3.7E-09 NA NA <br /> METALS <br /> Barium 211 1.1E-05 NA NA <br /> ' <br /> Beallium 0.82 4.1E-08 8.4E+00 5.1E-08 <br /> Chromium(Trivalent) 43.7 2.2E-06 NA NA <br /> Cobalt 12.0 6.0E-07 NA NA <br /> ' <br /> Copper 103 5.2E-06 NA NA <br /> Lead 16.3 8.1 E-07 4.2E-02 5.1E-09 <br /> Mercury 0.019 9.7E-10 NA NA <br /> Molybdenum 0.71 3.6E-08 NA NA <br /> ' Nickel 39.1 2.0E-06 9.1E-0I 2.7E-07 <br /> Vanadium 76.4 3.8E-06 NA NA <br /> Zinc 84.6 4.2E-06 NA NA <br /> Total Risk: 3.8E-07 <br /> Equation: <br /> Inhalation Risk=SH x Cj,.x 0.149 <br /> Where: <br /> SH=inhalation cancer slope factor,(mg/kg-day)-1 <br /> ' Cair=concentration in air,mg/m3 <br /> (Note:Using the PEA Manual,the value for Ca;,is estimated using Figures 2.5,2.6&2.7 for <br /> 1I VOCs and Figure 2.8 for non-VOCs.) <br /> Abbreviations: <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> mg/kg=Milligrams per kilogram ` <br /> mgfm3=Milligrams per cubic meter <br /> NA=Not Applicable <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> PEA=Preliminary Endangerment Assessment <br /> VOCs=Volatile organic compounds <br /> Equation Source: <br /> PEA Manual,Figure 2.4. <br /> SAIL <br /> Page 1 of l From Science to Solutloee <br />