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15 <br />r <br />1 <br />I.~~~ <br />10~ <br />Q~ <br />::c <br />o <br />42 ~ <br />142 <br />90~ <br />10~ <br />1 <br />60~ <br />Surface <br />Cemenl <br />2 Schedule 40 PVC I ' <br />Cosing <br />Gravel BLOW SANG <br />Cement Seal <br />Packer <br />3 '~ <br />4 /4 ~ Borehole <br />Slotted Casing <br />' LARAMIE <br />FORMATION <br />Figure 7. Construction of piezometer DH E118. <br />