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Whirlwind Mine Groundwater Characterization Report <br /> DP Spring discharge also shows an overall decreasing trend with discharge fluctuating <br /> seasonally; higher discharge occurs in early spring and lower discharge occurs in late summer <br /> and fall. It is possible that the overall decrease in DP Spring discharge is also related to pipe <br /> constrictions, from vegetation or sediment, over time. It is all but certain that both the PR and <br /> DP Spring discharges are only partially captured by the installed discharge pipes. <br /> These springs are located, DP Spring in particular, close to the Lumsden Fault. Another seep, <br /> named the Lumsden Spring or Seep is actually DP Spring discharged water that flows a short <br /> distance to the north and enters the Lumsden Canyon streambed channel. It has been <br /> hypothesized that the fault and associated fractures provide source waters to these springs, but <br /> the water chemistry is distinctly different, so it is apparent that source water is impacted by the <br /> geologic units in which the springs occur. <br /> 4.3 Hydraulic Data <br /> Hydraulic data pertaining to hydrostratigraphic units at and in the vicinity of the Whirlwind Mine <br /> are sparse. In 2008, EFR conducted rock core testing of a sample of Salt Wash Member <br /> obtained from the Whirlwind Decline. One three-inch diameter core was submitted for <br /> permeability testing using method ASTM D 5084. The results showed the permeability of the <br /> specimen to be 2.9 x 10-6 centimeters per sec (cm/s) (8.22 x 10-3 ft per day). A hydraulic <br /> conductivity test using method USBR 5600 was run on an eight-inch diameter core (CTL <br /> Thompson, 2008). This test was run from January 10 to March 14, 2008, and resulted in an <br /> estimated permeability of 1.7 x 10-6 cm/sec (4.82 x 10-3 ft per day). <br /> No other hydraulic testing data associated with the Whirlwind Mine and vicinity were located <br /> during preparation of this report. The previously discussed packer isolation sampling done on <br /> Umetco's BM00-1 borehole is the only other data that provides qualitative data on formation <br /> groundwater yield. Umetco's report states that groundwater test intervals in the borehole at the <br /> open hole interval spanning the bottom of the Burro Canyon and the top of the Brushy Basin, as <br /> well as deeper intervals within the upper Brushy Basin sandstone, and two lower tests in <br /> sandstone units of the lower Brushy Basin yielded 60 gallons of water before samples were <br /> collected. Whereas a test spanning the upper 60 ft of the Top Rim sandstone of the Salt Wash <br /> was first pumped for 40 minutes upon which no further water discharged. A recharge period of 2 <br /> Western Water& Land, Inc. 24 <br />