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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />4 <br />i <br />1). CM93 -1 was spudded on 4/13/93 and surface casing set 4/17/93. The cement <br />plug below the surface casing was drilled out on 4/19/93 and drilling of the <br />borehole was completed on 4/21/93. Due to problems with the integrety of the <br />PVC casing the construction of this well was not completed untill 9 /3/93. The <br />well was logged on 4/27/93 prior to construction of the well (Figure 2). <br />3.1.1Well Construction <br />A 12 -inch hole was drilled and eight -inch steel surface casing set from the <br />surface to a depth of 209 feet with 18 inches above ground level. The steel casing <br />was cemented in place using a cement grout containing 5% bentonite. The <br />surface casing was set to the Summerville formation in order to protect the <br />underlying aquifer from ground water in the Salt Wash member of the Morrison <br />formation. <br />A 7 7/8 inch hole was then drilled, with air, to a depth of 850 feet (Figure <br />2). The well was the developed by air jetting and evacuating the water from the <br />well until all cuttings were removed from the well and the water entering from <br />the formation was clean. This was accomplished prior to constructing the well. <br />The well was then constructed (Figure 2) using 220 feet of slotted (0.03), <br />4.5 inch, SDR 17, PVC pipe from 830 feet to 650 feet. An =slotted section of pipe <br />with a with a PVC cap on the bottom was placed from 830 to 850 feet. Unslotted <br />4.5 inch, SDR 17, PVC pipe was placed from a depth of 650 feet to 18 inches <br />above the surface level. A cement plug was then placed between the PVC pipe <br />and surface casing from a depth of 15 feet to just above surface level. A dedicated <br />pump was installed. <br />3 <br />