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r-7 r r? r-' r-7 f.77 r.-P. E7-V r" r" r" rel r" r,771? Com' " !' 1" r-' <br /> RSCA Too]Kit for Chemical Releases,Version 1.3 <br /> RSCA SITE ASSESSMENT <br /> 2 OF <br /> TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION <br /> INDOOR AIR EXPOSURE PATHWAYS 0 (CHECKED IF PATHWAY fS'ACTIVE) <br /> GROUNDWATER: VAPOR INTRUSION Exposure Concentradan <br /> INTO ON-SITE BUILDINGS 1)Source Medium 2)NAF Value(m^3il-) 3)Exposure Medium 4)Exposure Multiplier 5)Average Inhalation Exposure <br /> Receptor Indoor Air. POE Conc. (mglmA3) (1)1(2) (EFx£D)1(ATx365) (unilless) Concentration(mgfmA3)(3)x(4) <br /> Constituents of Concern Groundwater Conc.(mg/L) Reslder1W Residential Residential Residential <br /> Benzene 2.5E-4 4.1 E+3 6.1 E-8 4.1E-1 2.5E-8 <br /> Ethylbenzene 2.5E-4 3.5E+3 7.1 E-8 9.6E-1 6.8E-8 <br /> Toluene 2.5E-4 3.8E+3 6.6E-8 9.6E-1 6.3E-8 <br /> Xylene(mixed isomers) 5.0E-4 4.0E+3 1.2E-7 9.61_-1 1.2E-7 <br /> TPH-Aliph>C16-C21 2.5E-2 1.9E-1 1.3E-1 9.6E-1 1.2E-1 <br /> TPH-Aliph>C21-C34 2.0E+0 1.3E-1 1.5E+1 9.6E-1 1.5E+1 <br /> TPH-Arom>C16-C21 2.5E-2 3.0E+4 8.3E-7 9.6E-1 7.9E-7 <br /> TPH-Arom>C21-C35 2.0E+0 7.8E+4 2.6E-5 9.6E-1 2.5E-5 <br /> TPH-Aliph>C12-C16 2.5E-2 1.8E+0 1.4E-2 9.6E-1 1.3E-2 <br /> TPH-Arom >C12-C16 2.5E-2 1.3E+4 1.9E-6 9.6E-1 1.9E-6 <br /> NOTE: AT=Averaging time(days) EF=Exposure frequency(dayslyr) ED=Exposure duration(yr) NAF=Natural attenuation factor POE=Point of exposure <br /> Site Name:Heritage Square Date Completed:20-Sep-02 <br /> Site Location:640 N.San Joaquin Street,Stockton,CA Job I D: 3572E <br /> Completed By:Lee H.Morse <br />