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' TABLE 15 <br /> INHALATION CANCER RISK(CONSTRUCTION WORKER SCENARIO) <br /> SURLAND HOMES-BRIDLE CREEK <br /> ITracy,California <br /> Constituent in Soil Cs(mg/kg) Cee, (rug/m) SH Inhalation Risk <br /> ' BTEX <br /> Toluene 0,028 7.7E-07 NA NA <br /> Eth lbenzene 1.5 3.3E-05 8.7E-03 8.0E-10 <br /> ' Xylene(s) 1.5 3.3E-05 NA NA <br /> PAHs <br /> Acenaphthene 0.17 3.5E-07 NA NA <br /> 1 Anthracene 0.090 1.8E-08 NA NA <br /> Benzo(a)anthracene 0.032 t.6E-09 3.9E-01 1.7E-12 <br /> Benzo(a)pyrene 0.0046 2.3E-10 3.9E+00 2.5E-12 <br /> Benzo(b)17uoranthene 0.024 1.2E-09 3.9E-01 1.3E-12 <br /> Benzo( ,h,i) er leve 0.040 2.0E-09 NA NA <br /> Chr Bene 0.081 4.1E-09 3.9E-02 4.4E-13 <br /> Dibenz(a,h)anthracene 0.0068 3.4E-10 4.1E+00 3.9E-12 <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 3.2E-10 <br /> ' Phenanthrene 1.8 9.0E-08 NA NA <br /> P rene 0.074 3.7E-09 NA NA <br /> METALS <br /> ' Barium 211 1.1E-05 NA NA <br /> Beryllium 0.82 4.1E-08 8.4E+00 9.6E-10 <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 8.1E-07 4.2E-02 9.6E-11 <br /> Mercury 0.019 9.7&10 NA NA <br /> Mol bdenum 0.71 3.6E-08 NA NA <br /> Nickel 39.1 2.0E-06 9.1E-01 5.0E-09 <br /> Vanadium 76.4 3.8E-06 NA NA <br /> Zinc 84.6 4.2E-06 NA NA <br /> Total Risk: 7.2E-09 <br /> Equation: <br /> ' Inhalation Risk=SH x Ca;,x 0.0028 <br /> Where: <br /> SH=inhalation cancer slope factor,(mg/kg-day)- <br /> Carr=concentration in air,mg/m3 <br /> (Note:Using the PEA Manual,the value for Carr is estimated using Figures 2.5,2.6&2.7 for <br /> 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 /> mg/m3=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 /> ' Page I of 1 From science to solutions <br />