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TABLE 6 <br /> NONCANCER REFERENCE DOSES <br /> SURLAND HOMES-BRIDLE CREEK <br /> Tracy,California <br /> ' Inhalation Reference <br /> Oral Reference Dose Dose <br /> Constituent in Soil (m k -da ) Source (m -da ) Source <br /> ' BTEX <br /> Toluene 8.0E-02 IRIS 8.6E-02 OEHHA' <br /> Ethylbenzene 1.0E-01 IRIS 5.7E-01 OEHHAt <br /> Xylene(s) 2.0E-01 IRIS 2.0E-01 OEHHA' <br /> ' PAHs <br /> Acenaphthene 6.0E-02 IRIS 6.0E-02 IRIS' <br /> Anthracene 3.0E-01 IRIS 3.0E-01 IRIS' <br /> ' Benzo(a)anthracene NA IRIS NA IRIS <br /> Benzo(a)pyrenc NA IRIS NA IRIS <br /> Benzo(b)fluoranthene NA IRIS NA IRIS <br /> ' Benzo(g,h,i)perylene NA IRIS NA IRIS <br /> Chrysene NA IRIS NA IRIS <br /> Dibenz(a,h)anthracene NA IRIS NA IRIS <br /> Fluoranthene 4.0E-02 IRIS 4.0E-02 IRIS' <br /> ' Fluorene 4.0E-02 IRIS 4.0E-02 IRIS' <br /> Naphthalene 2.06-02 IRIS 2.6E-03 OEHHA' <br /> Phenanthrene NA IRIS NA IRIS <br /> ' Pyrene 3.0E-02 IRIS 3.0E-02 IRIS' <br /> METALS <br /> Barium 2.0E-01 IRIS 2.0E-01 IRIS' <br /> Beryllium 2.0E-03 IRIS 5.7E-06 IRIS <br /> ' Chromium(Trivalent) 1.5E+00 IRIS 1.5E+00 IRIS' <br /> Cobalt NA IRIS NA IRIS <br /> Copper NA IRIS NA IRIS <br /> ' Lead NA IRIS NA IRIS <br /> Mercury 3.0E-04 IRIS 2.6E-05 OEHHAI <br /> Molybdenum 5.0E-03 IRIS 5.0E-03 IRIS' <br /> Nickel 2.0E-02 IRIS 1.4E-05 OEHHAt <br /> ' Vanadium 5.0E-03 NCEA4 5.0E-03 NCEA' <br /> Zinc 3.0E-01 IRIS 3.0E-01 IRIS <br /> Abbreviations: <br /> 1 BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> Cal/EPA=California Environmental Protection Agency <br /> EPA=U.S.Environmental Protection Agency <br /> IRIS=Integrated Risk Information System <br /> ' kg=Kilograms <br /> m =Cubic meters <br /> mg=Milligrams <br /> mg/kg=Milligrams per kilogram <br /> ' NA=Not available or not applicable <br /> NCEA=National Center for Environmental Assessment <br /> OEHHA=Office of Environmental Health Hazard Assessment <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> ' PEA=Preliminary Endangerment Assessment <br /> REL=Reference Exposure Level <br /> RfC=Reference concentration <br /> RfD=Inhalation Reference Dose <br /> ' pg/L =Micrograms per liter <br /> Notes: <br /> 1. Chronic REL converted to RfD by multiplying REL(pg/rn)by(1 mg/1000 gg*20 m3/day*1/70 kg). <br /> ' 2. Consistent with PEA Guidance Manual,if no inhalation RfD was available the oral RfD was used. <br /> 3. RfC converted to RfD by multiplying RfC(mg/m)by(20 m3/day*1170 kg). <br /> 4. Reference dose based on molecular weight conversion from RfD for vanadium pentoxide(IRIS),from NCEA 2008. <br /> Sources: <br /> ' IRIS information from the EPA on-line database(November 2008). <br /> OEHHA information from the Cal/EPA on-line Toxicity Criteria Database(November 2008). <br /> ' Page 1 of 1 FrmSclancei0SNluthns <br />