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r r v r r r r r , r , r , r , r r r r r r r r <br /> RSCA Tool Kit for Chemical Releases,Version 1.3 <br /> RBCA SITE ASSESSMENT <br /> I OF 7 <br /> TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION <br /> OUTDOOR AIR EXPOSURE PATHWAYS ■ (CHECKED IF PATHWAY IS ACTIVE) <br /> SURFACE SOILS(10-20 ft): <br /> VAPORINHALATION 1)Source Medium 2)NAF Value(m"31k9) 3)Exposure Medium <br /> Receptor OuIdoorAir: POE Conc. (mg1m"3) (1)1(2) <br /> Off-site 1 Off-site 2 Off-site t Off-site 2 <br /> Soil Conc. On site(o ft) (o n) (o ft) On-site(o ft) (o ft) (o ft) <br /> (mglkg) Construction Construction <br /> Constituents of Concern Residential Worker None None Residential Worker None None <br /> Benzene 7.OE-3 _ 2.1 E+5 _ 3.3E-8 <br /> Ethylbenzene 6.3E-2 4.3E+5 1.4E-7 <br /> Toluene 6.6E-2 2.9E+5 2.3E-7 _ <br /> Xylene (mixed isomers) 6.6E-1 3.8E+5 1.7E-6 <br /> TPH-Aliph>C16-C21 3.6E+3 4.0E+6 _ 8.9E-4 _ <br /> TPH-Aliph>C21-C34 _ 1.9E+4 3.3E+6 5.7E-3 <br /> TPH -Arom >C16-C21 3.6E+3 8.5E+6 42E-4 <br /> TPH-Arom >C21-C35 1.9E+4 3.3E+7 5.8E-4 <br /> TPH -AI iph>C12-C16 3.6E+3 1,1 E+6 3.3E-3 T <br /> TPH -Arom >C12-C16 3.6E+3 3.1 E+6 1.2E-3 <br /> NOTE: 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 ID: 3572E <br /> Completed By:Lee H.Morse <br />