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r-" [" r7-'I' <br /> RSCA"tool Kit for Chemical Releases,Version 1,3 <br /> RBCA SITE ASSESSMENT <br /> 4 OF 10 <br /> TIER 2 PATHWAY RISK CALCULATION <br /> tNPP0R AIR EXPOSURE PATHWAYS 7 (CH(rCKE.1F PATHWAYS.ARE'ACTIVE} . <br /> TOXIC EFFECTS <br /> (5)Total Toxicant (6)Inhalation (7)Individual COC <br /> Exposure{m91m"3) Reference Concentration Hazard Quotient(5)r(6) <br /> Constituents of Concern Residential (mgrm13) Residential <br /> Benzene 6.6E-6 6.0E-3 1.1E-3 <br /> Eth lbenzene 1.4E-5 3.0E+0 1.4E-5 <br /> Toluene 3.4E-5 4.0E-1 8.6E-5 <br /> Xylene(mixed isomers) 1.9E-4 7.0E+0 2.7E-5 <br /> TPH-Aliph>C16-C21 <br /> TPH -Aliph>C21-C34 <br /> TPH -Arom>C16-C21 <br /> TPH-Aram>C21-C35 <br /> TPH-Aliph>C12-C16 1.4E-1 1.0E+0 1.4E-1 <br /> TPM-Arom>C12-C16 1.6E-2 2.0E-1 7.9E-2 <br /> Tota!Pathway Hazard Index= 2.2E-1 <br /> Site Name:Heritage Square Date Completed:20-Sep-{)2 <br /> Site Location:640 N.San Joaquin Street,Stockton,CA Job 10: 3572E <br /> Completed By:Lee H.Morse <br /> �1 <br />