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row! r '"r r"- r. , r. -T, r.,.� �' �.. r." <br /> RBCA Tool Kit for Chemical Releases,Version 1.3 <br /> RBCA SITE ASSESSMENT <br /> 5OF7 <br /> TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION <br /> pUTD00R AIR EXPOSURE PATHWAYS :. ■ (CHECKEU.IF PATHWAY 15 ACTIVE) <br /> GROUNDWATER:VAPOR Exposure Concentration <br /> INHALATION 1)Source Medium 2)NAF Value(m"31L) 3)Exposure Medium <br /> Receptor Outdoor Air. POE Conc. (mg/m"3) (1)1(21 <br /> On-site{0 K} <br /> Off-site 1 Off-site 2 On-site{0 fi) Off-site t Off-site 2 <br /> Groundwater (o ft) (o fl) (o fi) (o n) <br /> Constituents of Concern Conc. (mg1L) Residential None None Residential None None <br /> Benzene 2.5E-4 1.5E+6 1.7E-10 <br /> Ethylbenzene 2.5E-4 1.3E+6 1.9E-10 <br /> Toluene 2.5E-4 1.4E+6 1.8E-10 <br /> Xylene (mixed isomers) 5.0E-4 1.5E+6 3.4E-10 <br /> TPH-Aliph >C16-C21 2.5E-2 7.1 E+1 3.5E-4 <br /> TPH-Aliph >C21-C34 2.0E+0 4.8E+1 4.2E-2 <br /> TPH -Arom >C16-C21 2.5E-2 1.1 E+7 2.3E-9 <br /> TPH -Arom >C21-C35 2.0E+0 2.0E+7 1.0E-7 <br /> TPH-Aliph >C12-C16 2.5E-2 6.7E+2 3.7E-5 <br /> TPH -Arom >C12-C16 2.5E-2 4.7E+6 5.3E-9 <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 /> I <br />