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- RBCA Tool Kit for Chemical Releases,Version 1.3 <br /> REICA SITE ASSESSMENT <br /> 2OF10 <br /> TIER 2 PATHWAY RISK CALCULATION <br /> OUTDOOR AIR EXPOSURE PATHWAYS , (CHECKED IF PATHWAYS ARE ACTIVE) <br /> TOXIC EFFECTS <br /> (5)Total Toxicant (6)Inhalation (7) Individual COC <br /> Exposure(mg/m"3) Reference Hazard Quotient(5)r(6) <br /> Off-site 1 Off-Site 2 Cone. (mg1m13) Off-site 1 Off-Site 2 <br /> On-site(0 ft} (o ft) (o ft) On-site(0 ft) <br /> (0 ft) (0 ft) <br /> Construction Construction <br /> Constituents of Concern Residential Worker None None Residential Worker None , None <br /> Benzene 3.2E-8 6.0E-3 5.3E-6 <br /> Ethylbenzene 1.4E-7 1.0E+0 1.4E-7 <br /> Toluene 2.2E-7 4.0E-1 5.5E-7 <br /> Xylene (mixed isomers) 1.6E-6 7.0E+0 2.4E-7 <br /> TPH -Aliph >C16-C21 <br /> TPH-Aliph>C21-C34 <br /> TPH-Arom >C16-C21 <br /> TPH -Arom >C21-C35 <br /> TPH -Aliph >C12-C16 3.2E-3 1.0E+0 3.2E-3 <br /> TPH -Arom >C12-C16 1.1E-3 2.0E-1 5.5E-3 <br /> Tota!Pathway Hazard Index 8.7E-3 <br /> Site Name: Heritage Square Completed By:Lee H.Morse Job ID: 3572E <br /> Site Location:640 N.San Joaquin Street,Stockton, CA Date Completed:20-Sep-02 <br /> I <br />