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TABLE 15 <br /> ' INHALATION CANCER RISK: RESIDENTIAL SCENARIO 2 <br /> SURLAND HOMES-BRIDLE CREEK <br /> Tracy,San Joaquin County, California <br /> ' COPC Cs(mg/kg) C,, (mg/ms) SFi Inhalation Risk <br /> BTEX <br /> ' Toluene 0.0010 2.8E-08 NA NA <br /> Eth lbenzene 0.0070 1.5E-07 8.7E-03 2.0E-10 <br /> Xylene(s) 0.0010 2.2E-08 NA NA <br /> PAHs <br /> ' <br /> Acenaphthene 0.21 4.4E-07 NA NA <br /> Anthracene 0.23 4.7E-08 NA NA <br /> Benzo(a)anthracene 0.031 1.6E-09 3.9E-01 9.0E-11 <br /> Benzo(a)pyrene 0.0070 3.5E-10 3.9E+00 2.0E-10 <br /> Benzo b fluoranthene 0.055 2.8E-09 3.9E-01 1.6E-10 <br /> Benzo ,h,i a lene 0.078 3.9E-09 NA NA <br /> Benzo k fluoranthene 0.00067 3.4E-I1 3.9E-01 1.9E-12 <br /> ' <br /> Chrysene 0.110 5.5E-09 3.9E-02 3.2E-11 <br /> Dibenz a,h anthracene 0.0067 3.4E-10 4.1E+00 2.0E-10 <br /> Flumanthene 0.066 3.3E-09 NA NA <br /> Fluorene 0.70 2.5E-07 NA' NA <br /> Naphthalene 0.61 1.6E-06 1.2E-01 2.9E-08 <br /> Phenanthrene 0.88 4.4E-08 NA NA <br /> Pyrene 0.19 9.5E-09 NA NA <br /> METALS <br /> Barium 223 1.1E-05 NA NA <br /> Beryllium 0.93 4.7E-08 8.4E+00 5.8E-08 <br /> Chromium III 47 2.4E-06 NA NA <br /> ' Cobalt 13 6.5E-07 NA NA <br /> Copper 122 6.1 E-06 NA NA <br /> Lead 12 6.0E-07 4.2E-02 3.8E-09 <br /> ' <br /> Mercury 0.015 7.5E-10 NA NA <br /> Molybdenum 0.824.1E-08 NA NA <br /> Nickel 42 211E-06 I 9.1E-01 I 2.8E-07 <br /> Vanadium 81 4.1E-06 NA NA <br /> ' Zinc 113 5.7E-06 NA NA <br /> Total Risk: 3.8E-07 <br /> ' Equation: <br /> Inhalation Risk=SFi x C,x 0.149 <br /> Where: <br /> SFi=inhalation cancer slope factor,(mg/kg-day)-' <br /> C,,,=concentration in air,mg/ms <br /> (Note:Using the PEA Manual,the value for C,;,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 /> COPC=Constituent of potential concern <br /> mg/kg=Milligrams per kilogram <br /> mg/m'=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. Lw, <br /> ' Page 1 of 1 SSI IC <br />