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m Imbm m m m m <br /> RBCA Tool Kit for Chemical Releases,Version 1.0a <br /> RBCA SITE ASSESSMENT <br /> 4 OF 7 <br /> TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION <br /> ........... <br /> WE <br /> SUBSURFACE SOILS(530-990 cm),. <br /> VAPOR INHALATION (carrrd) 4)Exposure Multiplier 5)Average Inhalation Exposure <br /> (EFxED)/(ATx365) (unitless) Concentration(mg/m-3)(3)X(4) <br /> On-site(0 cm) Off-site I Off-site 2 On-sits(0 cm) Off-SRO I Off-site 2 <br /> (0 cm) (0 cm) (0 cm) (0 cm) <br /> Constituents of Concern Commercial None None Commercial None None <br /> Xylene(mixed isomers) 6.8E-1 9.8E-4 <br /> Toluene 6.8E-1 6.9E-6 <br /> Ethlbenzene. 6.8E-1 2.3E-4 <br /> Benzene* 2.4E-1 + 2.5E-6 <br /> NOTE: AT=Averaging time(days) EF=Exposure frequency(daystyr) ED=Exposure duration(yr) <br /> Site Name:Former Valley Volkswagen Date Completed:30-Nov-99 <br /> Site Location:647 E.Miner,Stockton,CA Job ID: 95-015 <br /> Completed By:GPS <br />