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Cancer Risk and Hazard Quotient for Soil Ingestion and Dermal Contact <br /> Risk.,, _ [SFo x CS x (1.57 E-6)] + [SFo x CS x (1.87 E-5) x ABS] <br /> Hazards"„ _ [(CS/Rfdo) x (1.28 E-5)] + [(CS/Rfdo) x (1.28 E-4) x ABS] <br /> Cancer Risk and Hazard Quotient for Dust Inhalation <br /> Risk,, = SM x Ca x 0.149 <br /> Hazard,,;, = (Ca/RFdi) x 0.639 <br /> Calculation of Airborne Concentration ("Ca") <br /> Ca (mg/m3) = CS(mg/kg) x 5 E-8(kg/m3) <br /> Cancer risk and toxicityhazard was calculated under a "worst case" scenario where the higher of <br /> g <br /> the 95% UCL soil concentrations or maximum detected concentrations were used as the soil <br /> concentration (Cs). The individual and cumulative cancer risk and hazard quotients calculated <br /> using the PEA equations are summarized below: <br /> COPC Ris o;, RiSLI Hazard o,, Hazard;, <br /> Cu (non-carc.) -- -- 3.20 E-1 7.25 E-4 <br /> Cr3+ (non-carc) -- -- 3.29 E-4 7.46 E-7 <br /> rCr" (carc.) 3.30 E-8 1.90 E-7 2.35 E-4 7.26 E-4 <br /> ' Sum: 3.30 E-8 1.90 E-7 3.20 E-1 1.45 E-3 <br /> Cancer Risk (all pathways): 2.23 E-7 Hazard Index (all pathways): 3.22 E-1 <br /> Neither the risk of contracting cancer nor of toxic effects is significant. Risk calculation data are <br /> summarized in the spreadsheet presented as Table 3. This spreadsheet incorporates the PEA <br /> risk/hazard calculation formulae. <br /> 5.5 Risk Evaluation for Lead <br /> ' The potential for adverse health effects to potential occupants of the property due to exposure to <br /> lead was evaluated by the use of the DTSC Lead Risk Assessment Spreadsheet ("Leadspread"). <br /> DTSC utilizes Leadspread to evaluate the potential for adverse health effects. Leadspread sums <br /> 8 <br />