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TABLE 18 <br /> 1 INHALATION HAZARD: RESIDENTIAL SCENARIO 2 <br /> SURLAND HOMES-BRIDLE CREEK <br /> Tracy,San Joaquin County,California <br /> COPC Cs(mg/kg) C.,(mg/ma) RIM Inhalation HQ <br /> BTEX <br /> Toluene 0.0010 2.8E-08F- <br /> .8E-088.IE-0' <br /> 2.0E-07 <br /> Eth (benzene 0.0070 1.5E-07 5.7E-Ol 1.7E-07 <br /> Xylene(s) 0.0010 2.2E-08 2.0E-01 7.2E-08 <br /> PAHs <br /> Acenaphthene 0.21 4.4E-07 6.0E-02 4.7E-06 <br /> Anthracene 0.23 4.7E-08 3.0E-01 9.9E-08 <br /> Benzo(a)anthracene 0.031 1.6E-09 NA NA <br /> Benzo(a)pyrene 0.0070 3.5E-I0 NA NA <br /> Benzo fluoranthene 0.055 2.8E-09 NA NA <br /> Benzo ,h,i a lene 0.078 3.9E-09 NA NA <br /> Benzo fluoranthene 0.00067 3.4E-11 NA NA <br /> Chrysene 0.110 5.5E-09 NA NA <br /> Dibenz a,h anthracene 0.0067 3.4E-10 NA NA <br /> Fluoranthene 0.066 3.3E-09 4.0E-02 5.3E-08 <br /> Fluorene 0.70 2.5E-07 4.0E-02 4.0E-06 <br /> Naphthalene 0.61 1.6E-06 2.6E-03 4.0E-04 <br /> Phenanthrene 0.88 4.4E-08 NA NA <br /> Pyrene 0.19 9.5E-09 3.0E-02 2.0E-07 <br /> ' METALS <br /> Barium 223 1.1E-05 2.0E-01 3.6E-05 <br /> Be Ilium 0.93 4.7E-08 5.7E-06 5.2E-03 <br /> Chromium III 47 2.4E-06 1.5E+00 1.0E-06 <br /> Cobalt 13 6.5E-07 NA NA <br /> Copper 122 6.1E-06 NA NA <br /> Lead 12 6.0E-07 NA NA <br /> Mercury 0.015 7.5E-10 2.6E-05 1.8E-05 <br /> Molybdenum 0.82 4.1E-08 5.0E-03 5.2E-06 <br /> Nickel 42 2.1E-06 1.4E-OS 9.6E-02 <br /> Vanadium 81 4.1E-06 5.0E-03 5.2E-04 <br /> Zinc 113 5.7E-06 3.0E-01 1.2E-05 <br /> Total Hazard Index: 1.0E-01 <br /> 1 Equation: <br /> Inhalation HQ=(C,AfDi)x 0.639 <br /> Where: <br /> RfDi=the inhalation reference dose,mg/kg-day <br /> Ca;,=concentration in air,mg/m3 <br /> HQ=hazard quotient <br /> I (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 /> COPC=Constituent of potential concern <br /> mg/kg=Milligrams per kilogram <br /> mg/m'=Milligrams per cubic meter <br /> t NA=Not Applicable <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> PEA=Preliminary Endangerment Assessment <br /> VOCs=Volatile organic compounds <br /> 1 <br /> Equation Source: <br /> PEA Manual,Table 2.4. <br /> Page 1 of 1 S' •,E <br />