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Tier 2 Worksheet 8-1 <br /> Site Name:McDowell and Davis Towing, 1360 Escalon Site Location:Fscalon San Joaquin County,CA Completed By:Robert FourtCE Date Completed: 1213/2002 4 OF 9 <br /> TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION <br /> SUBSURFACE SOILS: Frposum Cwwerrft im <br /> VAPOR INTRUSION TO RUILDWas 1)Source Medium 2)NAF Value fm"MM 3)Exposure Medium 4)Exposure Multiplier 5)Average Da0y Intake Rate <br /> Receptor Indoor Ac POE Caw.(mgrm'3)(1)r(2) (IRxEFxE0Y($VvxAT) Im'31kq-dM (-W*eA 7(3)X(4) <br /> Subsurface Soil Conc. <br /> Constituents of Concern on-.."Commerew O.Site CommndW Onsite co ..r w on-site Commerdat <br /> Benzene 4.3E-1 1.2E+2 3.5E-3 7,OE-2 2.4 E4 <br /> Eth (benzene 2.5E+1 1.5E+2 1.7E-1 2.0E-1 3.3E-2 <br /> Methyl t-BEther 4.4E+1 4,0E+2 1.1E-1 2.0E-1 2.1E-2 <br />€ Toluene 6.4E+1 2.0 E+2 3.0E-1 2.0E-1 5.9E-2 <br /> Xylene mixed isomers 2.0E+2 3.1E+2 6.5E-1 2.0E-1 1.3E-1 <br /> III <br /> NOTE: ABS=Dermal absorption factor(dim) BW=Body weight(kg) EF=Exposure frequencey(dayslyr) POE=Point of exposure <br /> AF=Adherence factor(mglcm^2) CF=Units conversion factor ET=Exposure time(hNday) SA=Skin exposure area(cm"21day) <br /> AT=Averaging time(days) ED=Exposure duration(yrs) fR=Inhalation rate(m"3/day) <br /> Software:GSI RBCA Spreadsheet Serial,G-491-EFX-872 <br /> 0 Groundwater Services,Inc.(GSI),1995-1997.Al Rights Reserved. Version: 1.0.1 <br /> I� <br /> i <br />