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RBCA Tool Kit for Chemical Releases,Version 1.3 <br /> RBCA SITE ASSESSMENT <br /> 40P7 <br /> TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION <br /> OUTDOOR AIR EXPOSURE PATHWAYS. ... <br /> SUBSURFACE SOILS(30-20 n): <br /> VAPOR INHALATION (cont'd) 4)Exposure Multiplier 5)Average Inhalation Exposure <br /> (EFxED)1(ATx365) (unitless) Concentration(mg/MA3)(3)x(4) <br /> Off-site 1 Off-site 2 Off-site 1 Off-site 2 <br /> On-site(0 ft) (o ft) (0 ft) On-site(0 K} (0 rt) (0 ft) <br /> Constituents of Concern Residential None None Residential None None <br /> Benzene <br /> Ethylbenzene <br /> Toluene <br /> Xylene(mixed isomers) <br /> TPH-Aliph >C16-C21 <br /> TPH-Ali ph>C21-C34 <br /> TPH -Arom >C16-C21 <br /> TPH -Arom >C21-C35 <br /> TPH-Aliph >C12-C16 <br /> TPH -Arom >C12-C16 <br /> NOTE: AT=Averaging time(days) EF=Exposure frequency(dayslyr) ED= Exposure duration(yr) <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 />