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SM -18 Mine Report <br />GeoScience Services <br />Table2: Hydraulic properties for relevant geologic units <br />(1) Reference values are from (Lohman, 1965) <br />(2) Reference values are from (Freeze and Cherry, 1970) <br />Table 3: Sorption Coefficients (Kd) for selected analytes based on relevant geologic <br />material (after Sheppard and Thibault, 1990) <br />Analyte <br />Hydraulic Conductivity <br />(cm/s) <br />Storativity <br />Entrada Sandstone <br />1.9E -5 to 6.5E -5 <br />5E -5 to 7E -5 <br />Morrison FormatioP7 <br />Not available <br />5E -5 <br />Sandstone 171 <br />lE4 TO lE -8 <br />Not available <br />Shale(2) <br />lE -7 TO 1E -11 <br />Not available <br />(1) Reference values are from (Lohman, 1965) <br />(2) Reference values are from (Freeze and Cherry, 1970) <br />Table 3: Sorption Coefficients (Kd) for selected analytes based on relevant geologic <br />material (after Sheppard and Thibault, 1990) <br />Analyte <br />Sand (m /kg) <br />Clay (m /kg) <br />Aluminum <br />Not available <br />Not available <br />Arsenic <br />Not available <br />Not available <br />Lead <br />0.27 <br />0.55 <br />Selenium <br />0.15 <br />0.74 <br />Uranium <br />0.035 <br />0.60 <br />Zinc <br />0.20 <br />0.40 <br />5.0 Results <br />Results of the contaminant transport modeling for the migration of uranium and <br />selenium are presented in Figures 2 and 3. The resulting contaminant plumes are <br />overlain on the geologic cross section for the area. The figures show the extent of <br />constituents of concern after 1000 years of transport under steady -state conditions. The <br />concentration intervals represent 1 /1000` and 1 /1E -06 of the initial concentration of <br />constituents of concern in the pore water of the waste rock pile. <br />10 <br />