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JD-8 Mine Report <br />Geoscience Services <br />Tablet: Hydraulic properties for relevant geologic units <br /> Hydraulic Conductivity <br />(cm/s) Storativity <br />Entrada Sandstone 1.9E-5 to 6.5E-5 SE-5 to 7E-5 <br />Morrison Formation Not available SE-5 <br />Sandstone lE-4 TO lE-8 Not available <br />Shale lE-7 TO lE-1 I 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 Thibau1t,1990) <br />Analyte Sand (m /kg) Clay (m /kg) <br />Aluminum Not available Not available <br />Arsenic Not available Not available <br />Lead 0.27 0.55 <br />Selenium 0.15 0.74 <br />Uranium 0.035 0.60 <br />Zinc 0.20 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 3 and 4. The resulting contaminant plumes are <br />overlain on the geologic cross section for the SM-18 mine area. The geology for the JD- <br />8 mine is similar to the SM-18 mine with the notable exception of the slump blocks that <br />are absent in the area around the SM-18 mine. However, potential contaminant plumes <br />9 <br />