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20 <br />Schwartzwalder Mine -Hydrologic Evaluation of Mine Closure and Reclamation <br />Table 10. Summary of Packer Permeability Test Results <br /> <br />Borehole <br />Interval <br />Lithology Hydraulic <br />Conductivity <br />cm/sec <br />Comments <br />19D-53 228.1 - 270.1 <br />92 <br />227 <br />2 MS <br />GBG - MS 2.6E-07 <br /><1.0E-7 <br />No measurable flow during injection test <br />19D-53 . <br />- <br />185.9 <br />19D-53 142.7 - 184.7 GBG - MS 5.3E-07 <br />19D-53 101.75 - 143.75 GBG - MS 3.6E-07 <br />19D-53 58.9 -100.9 MS 2.7E-07 <br />19C-t6 185.75 - 227.75 LSHG <br />LSHG 1.6E-06 <br /><1 <br />0E-7 <br />No measurable flow during injection test <br />19C-16 <br />19C-16 228.4 - 270.4 <br />85 - 312.85 <br />270 LSHG . <br /><1.0E-7 No measurable flow during injection test <br />19C-16 . <br />7 - 185.7 <br />143 LSHG <1.0E-7 No measurable flow during injection test <br />19C-16 . <br />61.05 - 103.05 LSHG <1.0E-7 No measurable flow during injection test <br />19K-18 7 - 91.7 <br />49 PEG <1.0E-7 No measurable flow during injection test <br />19K-18 . <br />55 -134.55 <br />92 PEG - MS <1.0E-7 No measurable flow during injection test <br />19K-18 . <br />133.95 - 175.95 MS <1.0E-7 No measurable flow during injection test <br />19K-18 20.1- 62.1 PEG - MS 9.9E-08 <br />15B-13 168 - 725 LSHG 7.0E-06 <br />15B-13 105 - 168 LSHG 4.0E-07 <br />ISB-13 171.2 - 725 LSHG 1.0E-OS <br />15B-13 142.7 - 184.7 LSHG 5.3E-07 <br />19D-16 178.1 - 675 GBG 3.3E-OS Leakage around packer, skewed results <br />19D-16 153.75 -174.75 GBG 6.0E-06 <br />19D-16 132 -153 GBG 2.5E-07 <br />19D-16 160.3 - 181.3 GBG 3.7E-06 <br />Count 22 <br />Maximum 3.3E-OS cm/sec <br />Minimum 9.9E-08 cm/sec <br />Average 2.9E-06 cm/sec <br />Geo. Mean 4.7E-07 cm/sec <br />Median 2.7E-07 cm/sec <br />Standard Dev. 7.2E-06 cm/sec <br />4.2 Groundwater in Alluvium <br />Groundwater is present in alluvium at depths ranging from near ground surface to over 30 feet. Alluvium <br />in the vicinity of the mine is comprised of sand- to cobble-sized material and occurs as deposits of limited <br />thickness and aerial extent adjacent to Ralston Creek. Alluvial groundwater has been studied in detail by <br />monitoring wells installed at 10 locations, and by the collection of water level and water quality data over a <br />period of 26 years. The locations of alluvial monitoring wells are shown in Figure 1 and Figure 2. <br />Completion data for the monitoring wells are presented in Table 11 and well logs are provided in Appendix <br />C. Hydrologic data are also available from four groundwater collection systems located in the alluvium. <br />Groundwater collection systems are comprised of French drains and sumps which intercepted groundwater <br />and pumped it to the water treatment facility. Sump locations are shown in Figure 10. <br />Whetstone Associates <br />4109B.071116 <br />