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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 /> . ........ <br /> SUBSURFACE 301L$(530-990 c1n): <br /> VAPOR INHALATION (confd) 4)Exposure Multiplier 5)Average Inhalation Exposure <br /> (EFxED)/(ATx365) (unftless) Concentration(rngtm^3)(3)x(4) <br /> On-site(0 cm) Off-sits 1 Off-site 2 On-site(0 cm) Off-site 1 Off-site 2 <br /> (0 cm) (0 cm) (()cm) (0—) <br /> Constituents of Concern Residential None None Residential None None <br /> Xylene (mixed isomers) 9.6E-1 1.1E-3 <br /> Toluene 9.6E-1 8,0E-6 <br /> Ethylbenzene 9.6E-1 2.8E-4 <br /> Benzene* 4.1 E-1 + 3AE-6 <br /> NOTE: AT=Averaging time(days) EF=Exposure frequency(da") 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 />