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VVZI INC <br /> of hydrocarbon constituents in the water table which explains the variable concentrations <br /> of hydrocarbon constituents in individual monitoring wells <br /> i <br /> 13 Mass Balance Calculation of the Substance Treated Versus that Remaining <br /> I <br /> A mass balance calculation of the total amount of estimated initial content of hydrocarbon <br /> 114 Zo P9 7,4 <br /> impacted soil in the vadose zone was determined to be 1.6-0 cubic yards This estimate <br /> was outlined in Section 7 3 of this report The total amount remaining in the soil is <br /> estimated to be approximately 1,600 cubic yards This estimate was outlined in Section <br /> 7 3 of this report <br /> 14 Assumptions, Parameters, Calculations and Model Used in Risk Assessments, and <br /> Fate and Transport Modeling <br /> No modeling or risk assessment was conducted in support of this project <br /> 40 <br /> 15 Rationale Why Conditions Remaining at the Site Will Not Adversely Impact Water <br /> Quality, Health or Other Beneficial Uses <br /> See Section 10 0, Item 5 of this report <br /> 16 WET or TCLP Results <br /> No WET or TCLP analyses of the samples were conducted A single Soluble Threshold <br /> Limit Concentration (STLC) for soluble lead was conducted and was reported to contain a <br /> concentration of 0 6 mgll <br /> 19150011005 41 <br />