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RBCA Tool Kit for Chemical Releases,Version 1.3 <br /> RBCA SITE ASSESSMENT <br /> 3 OF 7 <br /> TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION <br /> OUTDOCIR AIR.EXPOSURE PATHWAYS Q (CHECKED IF PATHWAY IS ACTIVE) <br /> SUBSURFACE SOILS(30.20 ft <br /> VAPORINHALATION 1)Source Medium 2)NAF Value(m"3/kg) 3)Exposure Medium <br /> Receptor Outdoor Air: POE Conc. (mglm13) (1)1(2) <br /> Off-site 1 Off-site 2 Off-site 1 Off-site 2 <br /> Soil Conc. on-site(0 rt) (0 ft) (0 ft) On-site{a K} (a n) (0 ft) <br /> Constituents of Concern (mg1k9) Residential None None Residential None None <br /> Benzene 7.0E-3 <br /> Ethylbenzene 6.3E-2 <br /> Toluene 6.6E-2__ <br /> Xylene (mixed isomers) 6.6E-1 <br /> TPH -Aliph >C16-C21 3.6E+3 <br /> TPH -Aliph >C21-C34 1.9E+4 <br /> TPH -Arom >C16-C21 3.6E+3 <br /> TPH -Arom >C21-C35 1.9E+4 <br /> TPH-Aliph >C12-C16 3.6E+3 <br /> TPH -Arom >C12-C16 3.6E+3 <br /> NOTE: NAF=Natural attenuation factor POS=Paint 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 />