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Battle Mountain Resources, Inc. <br /> September 25, 2018 <br /> Page 2 <br /> LWS contracted with Elite Drilling Services, LLC(Elite Drilling)of Denver, Colorado to perform <br /> the drilling for the lysimeter installation. LWS and Elite Drilling mobilized to the site for <br /> installations on August 8,2018. Before the arrival of LWS and Elite Drilling, BMRI prepared the <br /> site for the installation by creating an access way for vehicles and clearing the installation areas of <br /> vegetation. LWS and Elite Drilling arrived on the site at approximately 9:00 A.M., and began <br /> drilling the 50-ft borehole at site 1. Elite Drilling used an 8 1/4-inch hollow-stem auger to drill each <br /> borehole to total depth for the installation of the lysimeters. <br /> During drilling of both lysimeters, the cuttings returned on the auger flights were noted, but not <br /> logged. Generally,the cuttings from the borehole were poorly-graded fine sands with well graded, <br /> angular gravels.There are some fines present in the colluvium.The sand was tan with a reddish hue, <br /> with fine-to-medium grained sub-angular particles.The gravels ranged from pebble-sized to one inch <br /> across and were dark gray in color. The gravelly sand varied minimally during drilling of both the <br /> 25-ft and 50-ft boreholes. However, the decree requires installation of paired shallow and deep <br /> lysimeters.The cuttings showed no sign of subsurface water,resisted clumping,and left no moisture <br /> on the hands after handling. BMRI staff indicated that the lysimeters installed in 2014 have never <br /> produced water for a sample, and these findings are consistent with that statement. <br /> After reaching the target depths, the hollow-stem auger was backed out approximately 2 ft to <br /> facilitate the installation of the lysimeter.A Soil Management Systems(SMS)suction lysimeter was <br /> chosen by LWS for the installation and was tested in the LWS office for leaks with distilled water <br /> before being transported to the site, per the manufacturer's recommendations (Appendix A). The <br /> porous cup lysimeter was then lowered into the borehole through the auger flights. Next, LWS <br /> created a slurry by mixing approximately 50 pounds (lbs) of 200-mesh silica flour with distilled <br /> water in a clean five-gallon bucket and then poured this slurry down the hollow-stem auger to <br /> surround the porous cup of the lysimeter. Three stainless steel tubes used for sample collection, <br /> vacuum application, and re-wetting of the porous cup,were attached to the provided polyethylene <br /> tubing via stainless steel. The silica flour was then left to set around the porous cup for <br /> approximately 2 hours. <br /> After the silica flour had set,the auger was backed out 3 ft to minimize the risk of locking the auger <br /> in place and also to allow bentonite chips to be set downhole. The depth to the slurry was tested <br /> using a tremie pipe after the auger was backed out to confirm the depth of the silica flour and to <br /> confirm that the hole had not collapsed.The end of the measuring device returned to the surface was <br /> covered in silica flour slurry,confirming that the borehole was intact. A 50-pound bag of untreated <br /> bentonite chips was then poured downhole and subsequently hydrated to seal the slurry from vertical <br /> infiltration. <br /> The auger flights were then pulled out of the borehole and drilling cuttings were shoveled into the <br /> borehole above the bentonite seal to a depth of 5 ft below ground surface. Two feet of bentonite <br /> chips were then emplaced as a seal.A 4-inch x4-inch x 5-ft lockable steel stickup was placed on top <br />