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Table 4 <br /> Summary of Indoor Air Modeling Inputse <br /> Chevron Facility#306620 (Former Unocal#5098) <br /> 5400 and 5606 Pacific Avenue, Stockton, California <br /> Residential Building Commercial/Industrial Building <br /> Parameter Value Units Reference Value Units Reference <br /> Buildin <br /> Default for a slab-ongmde <br /> Building Length,Width and Height 1000 x 1000 x 244 cm residential building' 1000 x 1000 x 244 cm Default for a slabwngrade residential building' <br /> Indoor PJr Exchange Rate 0.50 10iour Default for a residential building3 1.0 t/hour Default for a commerciePmdusMal building' <br /> Average Vapor Flow Rate Into Building 5 L/min Default for a residential building' 5 L/min Default for a residential building' <br /> Slab or Basement Scenario Slab-on-Grade Most appropriate scenario for CA Slab-on-Grade Most appropriate scanado for CA <br /> Soil <br /> Soil Type Loam - Site specific' Loam - Site specific' <br /> Vadose zone soil dry bulk density 1.84 glcma Site specific 1.84 g/cma site speGfica <br /> Vadose zone soil total porosity 0.3 cm3/cm3 Site specific' 0.3 cm3/cm3 Site specific' <br /> Vadose zone soil water-filled porosity 0.165 .31cm3 Site specific' 0.165 cm3/cm3 Site specific' <br /> Soil Vapor Sample Depm 152.4 cm Site specific(5 ft) 152.4 cm Site specific(5 ft) <br /> Qsoll-Average Flow Rate into Building 5 Um Model default 5 Um Model default <br /> Soil Temperature 16.7 °C Default value for site location° 16.7 °C Default value for site location° <br /> E%OOSuno <br /> Exposure Duration 30 year Default assumption for Resident" 25 year Default assumption for Commercial/Industdal Worker° <br /> Exposure Frequency 350 day/year Default assumption for Resident 1.4 250 day/year Default assumption for Commercial/industrial Worker <br /> Averaging Tim-Noncardnogens 30 year Default assumption for Resident''0 25 year Default assumption for Commerciagindustdal Worker° <br /> Averaging Time-Carcinogens 70 year Default assumption far Resident 1,4 70 year Default assumption for Commercial8ndustrial Worker" <br /> ToxIcIN Valuss Compound Specifics - Compound Specific° <br /> Benzene <br /> Unit Risk Facto 2.90E-05 (mg/my CaIEPA(2009x) 2.90E-05 (mg/map' CaIEPA(2009x) <br /> Reference Concantratio 6.00E-02 (mg/ma) CalEPA(2008) 6.00E-02 (mg/ma) CalEPA(2008) <br /> C6-CB Ali hatics <br /> Unit Risk Facto NA (m9/ma)-� <br /> Reference concentration 7 OOE-01 (mg/ma) TPH guidance(CaIEPA,2009bf 7.00E-01 (mg/m) TPH guidance(CaIEPA,20096)' <br /> CB-C10 Niphatics 3 <br /> Unit Risk Factor NA NA <br /> Reference concentrate 3.00E-01 (mg/ma) TPH guidance(CaIEPA,2009bfa7.00E-01 <br /> -01 (mgW) TPH guidance(CaIEPA,20096)' <br /> C5-C8 Aliphatics° <br /> Unit Risk Facto NA (mg/m3)-' (mg/m3)-' <br /> Reference Concentrator 7.00E-01 (mg/ma) TPH guidance(CaIEPA,20096) (mg/ma) TPH guidance(CaIEPA,20096) <br /> C9-C18 Aliphaticss <br /> Unit Risk Facto NA (mg/mY (mg/ma)"' <br /> Reference Concentmtio 3.00E-01 (mg/ma) TPH guidance(CaIEPA,20091b) 3.00E-01 I (mg/m) TPH guidance(CaIEPA,2009b) <br /> 60146576 2 of 4 AECOM <br />