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t r r r r r r r r r r r r r t r rRBCA SITE ASSESSMENT <br /> r r <br /> ( f � <br /> Tier 2 Worksheet 8.1 <br /> Site Name:McDowell and Davis Towing,1360 Escalon Site Location:Escaion,San Joaquin County Completed By:Robert Fourt,CEG!CHG Date Completed:5/12/2002 3 OF 9 <br /> TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION <br /> GROUNDWATER:VAPOR Expmum Con-flretkm TOTAL PATHWAY INTAKE(msrkpday) <br /> INHALATION 5)Source Medium 2)NAF Value W311-1 3)L=surlt Medium 4)Exposure, uttiolier 5)Avergge Daily Intake Rate (s�k*s""W"hum surr e,, <br /> Receptor Outdoor Air:POE Cant.{mplm^3)(1)!0 (IR.EF.EDy(DWYA.T) (m"3n,pday) (m%4Why)(3)x(4) sueswfft*A RorjrdWvftr rmft <br /> Groundwater Conc. <br /> aj <br /> Constituents of Concern m O'sNs Cammerdal OnSita Cammerdvl On-ue Commerdel OnSk CommefeW on-ske Commerdd ort-Site RetlderdW <br /> Benzene 1.1E-2 9.2E+5 1.2E-8 7.0E-2 8.3E-10 1.6E-7 2.2E-7 <br /> Eth (benzene 2.6E-3 9.0E+5 2.9E-9 2.0E-1 5.7E-10 2.7E-5 3.1E-5 <br /> Methyl t-But I Ether 1.0E-4 1,7E+65.9E-11 2AE-1 1.2E-11 4.6E-5 5.3E-5 <br /> Toluene 3.9E-3 9.3E+5 4.2E-9 2.0E-1 8.2E-10 6.3E-5 7.3E-5 <br /> Xylene mixed isomers 1.1E-2 1.0E+6 1.1E-8 2.0E-1 2.2E-9 EEA 1 2.1E-3 2.4E-3 <br /> NOTE: ABS=Dermal absorption tactor(dim) BW=Body weight(kg) EF a Exposure frequenceY(d <br /> e)'sM) POE=Point of exposure <br /> AF a Adherence factor(mgtcm"2) CF=Unita conversion WDr ET=Exposure time(hrs/day) SA=Skin exposure area(cm-2/day) <br /> AT=Averaging time(days) ED=Exposure duration(yrs) IR=Inhalation rate W3/day) <br /> Software:GSI RSCA Spreadsheet Serial: G-491-EFX-872 <br /> Ct Groundwater Services,Inc.(GSI),1995.1997.All Rights Reserved_ Version: 1.0.1 <br />