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Tier 9 Spreadsheet <br /> Tables H-1 through H-5 of this appendix present the equations contained in the Tier 1 <br /> spreadsheet for each of the five media considered surficial soil, subsurface soil, <br /> groundwater, air, and water used for recreation(surface water) <br /> The equations used to calculate the Tier 1 values are identical to the ones suggested in <br /> the ASTM's Risk-Based Corrective Action standard (ASTM, 1995) with the <br /> following exceptions <br /> The equations used to calculate RBSLs for carcinogenic and non-carcinogenic <br /> health effects use two different receptor definitions <br /> - For carcinogenic health effects under the residential land use scenario, the <br /> equations assume an additive child/adult receptor, that is, the receptor is <br /> assumed to be a young child for six years of the 30-year exposure duration <br /> and an adult for the remaining 24 years <br /> For non-carcinogenic health effects under the residential land use scenario, <br /> the equations assume that the receptor is always a child <br /> - For both carcinogenic and non-carcinogenic health effects under the <br /> commercial/ industrial land use scenario, the equations assume the <br /> commerciaVindustnal receptor defined in the inputs sheet (which differs <br /> from the ASTM assumptions) <br /> Fate and transport effects in both the vadose and saturated zones can be <br /> incorporated in the Tier 1 spreadsheet(but not the ASTM guidance)by <br /> including the Green-Ampt algorithm and Domenico equation, respectively <br /> However, if the user wants to match the numbers in the ASTM document, <br /> these modifications can be readily bypassed by placing the receptor at the <br /> source which, in turn, is placed at the water table <br /> Tables H-1 and H-2 present the equations used to calculate RBSLs for carcinogenic <br /> and non-carcinogenic effects, respectively Table H-3 defines the exposure <br /> parameters used in the RBSL equations The equations used to calculate the various <br /> volatilization factors, leaching factors, and effective diffusion coefficients are <br /> presented in Table H-4 The soil, building, surface and subsurface parameter <br /> variables used in the Table H-4 equations are defined in Table H-5 <br /> H-3 <br />