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Hydro Investigation Results <br /> Santa Fe Formation-West Pit Battle Mountain Resources Inc. <br /> On November 1, 2022, the day before beginning the test, downhole pressure transducers (Insitu <br /> Level Troll 7000)were placed in well WP-6 and in monitoring wells WP-1, WP-2, WP-3, WP-4, <br /> and PW-4. The pressure transducers were all set to 1-minute measurement intervals to measure <br /> background or pre-testing potentiometric conditions. The wells were outfitted with pressure <br /> transducers and data was collected from the wells before, during, and following the pumping test <br /> (Attachment B). <br /> The pumping test was conducted using a submersible 3-inch pump that was lowered to within one <br /> foot above the bottom of well WP-6 at approximately 88 ft bgs. The flow rate was managed using <br /> a surface valve. An inline flow meter was installed on the discharge piping to measure <br /> instantaneous and cumulative flow during the test. Flow rates were also measured using a <br /> stopwatch and 5-gallon bucket to confirm the readings from the flow meter. Water recovered from <br /> the test was initially pumped into a 250-gallon holding tank located near the pumped well and then <br /> transferred to a West Pit holding area located approximately 350 feet to the northwest. <br /> The water level in WP-6 just prior to the start of pumping was 27.44 feet below top of casing (ft <br /> btoc). The casing stickup was approximately 5 ft above ground surface at the time of the test. <br /> Based on the total depth of the well,there was approximately 66.5 feet water in the casing prior to <br /> the test. Casing storage is calculated at approximately 98 gallons of water. <br /> The WP-6 pumping test was started at 15:16 on November 2, 2022. The initial pumping rate was <br /> over 25 gallons per minute (gpm) but was quickly decreased in response to the rapid water level <br /> decline in the pumping well. The pumping rate was stabilized around 2 to 3 minutes into the test <br /> at approximately 1.6 gpm. After 22 minutes of pumping, the water level in WP-6 dropped below <br /> the level of transducer at a depth of approximately 35.6 feet below the initial water level (63 ft <br /> btoc). The pump began to work intermittently in response to the reduced head and shut off 26 <br /> minutes after startup. A water level meter recorded a maximum depth of approximately 68 ft btoc <br /> near the end of the test. The total volume pumped during the test was recorded on the flow meter <br /> totalizer as 67.44 gallons. The average pumping rate during the WP-6 test was 2.59 gpm. Most of <br /> the water extracted during the test can be attributed to removal of casing storage. The pump was <br /> left in the well overnight to allow for recovery of the water level in WP-6. <br /> Figure 3 shows the output from the pressure transducer in WP-6. The graph shows a very slow <br /> recovery of the water level in the well following the test. Water levels in WP-6 had not recovered <br /> to pre-pumping levels at 16 hours after pump shutoff. Furthermore, projection of the recovery <br /> curve suggests that full recovery would take several days. These data indicate a low transmissivity <br /> for the Santa Fe Fm relative to the results of aquifer testing of the alluvial aquifer. The data from <br /> all of pressure transducers were downloaded the day following the test.No response was observed <br /> in any of the observation wells. Analysis of the WP-6 test results is provided in the following <br /> section; Section 3 Hydrologic Test Analyses. <br /> 3.0 HYDROLOGIC TEST ANALYSES <br /> February 2023 4 Engineering Analytics,Inc. <br />