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TABLE 11 <br /> ESTIMATED ORAL AND DERMAL HAZARDS <br /> MOUNTAIN HOUSE DEVELOPMENT SITE#6 <br /> Mountain House, San Joaquin County,California <br /> COPC in Soil Cs(mg/kg) RfDo ABS Oral/Dermal HQ <br /> BTEX <br /> Benzene 0.00050 4.0E-03 0.1 3.2E-06 <br /> Ethylbenzene 0.055 1.0E-01 0.1 1.4E-05 <br /> Xylene(s) 0.0010 2.0E-01 0.1 1.3E-07 <br /> PAHs <br /> Acenaphthene 0.47 6.0E-02 0.15 2.5E-04 <br /> Acenaphthylene 0.19 NA 0.15 NA <br /> Anthracene 0.17 3.0E-01 0.15 1.8E-05 <br /> Benza(a)anthracene 0.21 NA 0.15 NA <br /> Benzo(a)pyrene 0.041 NA 0.15 NA <br /> Benzo(b)fluoranthene 0.052 NA 0.15 NA <br /> Benzo(g,h,i)perylene 0.033 NA 0.15 NA <br /> Benzo(k)fluoranthene 0.047 NA 0.15 NA <br /> Chrysene 0.68 NA 0.15 NA <br /> Dibenz(a,h)anthracene 0.034 NA 0.15 NA <br /> Fluoranthene 0.079 4.0E-02 0.15 6.3E-05 <br /> Fluorene 0.66 4.0E-02 0.15 5.3E-04 <br /> Indeno(1,2,3-cd)pyrene 0.016 NA 0.15 NA <br /> Naphthalene 0.33 2.0E-02 0.15 5.3E-04 <br /> Phenanthrene 4.0 NA 0.15 NA <br /> Pyrene 0.27 3.0E-02 0.15 2.9E-04 <br /> Total Hazard Index: 1.7E-03 <br /> Equation: <br /> Oral/Dermal HQ=([Cs/RfDo]x[1.28 x 10-5])+([Cs/RfDo]x[1.28 x 10-4]x ABS) <br /> Where: <br /> RtDo=oral reference dose,mg/kg-day <br /> Cs=concentration in soil,mg/kg <br /> ABS=absorption fraction,dimensionless(Source:PEA Manual, Page A-6) <br /> HQ=hazard quotient <br /> Abbreviations: <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> Cal/EPA=California Environmental Protection Agency <br /> COPC=Constituent of potential concern <br /> DTSC=Department of Toxic Substances Control <br /> mg/kg=Milligrams per kilogram <br /> NA=Not applicable <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> PEA=Preliminary Endangerment Assessment <br /> Equation Source: <br /> PEA Manual,Figure 2.3. (Cal/EPA DTSC,June 1999). <br /> From Science to SoNhons <br /> Page 1 of 1 <br />