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History Well 21-2 <br />• ' , Well 21-2 History <br />Location • NE'/,, SW'/. Section 21, T1S, R97W, 6w PM <br />Coordinates Northing 11,789.08, Easting 12,872.95 <br />Collar Elevation 6219.7 ft amsl <br />Date of Drilling May 13, 1997 <br />Total Drilled Depth 95 ft <br />Summary Report by Daub Associates Inc. May 1997 _ <br />_Drillingan~lNellCompfetion 1.:_,'!.,_,~ti~__.;._, _~,__~v,_; _._.__.~_ <br />Drill Hole Size 8" From 0 To 7° casing size 5° steel from -1' to 7' <br />Drill Hole 4 7/8° From 7' to 95' casing size 2° PVC schedule 40 from 0' to <br />92' <br />Screened interval 82' to 92' total depth 95' <br />Sand placed from 95' to 75' <br />Bentonite chips 70' to 75' <br />Well was dry when drilled after 24 hours water level at 71' and 1,000 ppm <br />TDS <br />5" surface casing cemented to surface, -1 to 7' <br />2" PVC cemented form 0 to 7' <br />2 sacks of bentonite chips on top of sand <br />5 sacks of sand, 50# sacks <br />• Sampling <br />July 22, 1999 water quality sample collected using low flow bladder pump. <br />August 27, 1999 <br />• September 24, 1999 water quality sample collected using gas <br />displacement pump. <br />October 21, 1999 water quality sample collected using gas displacement <br />pump. <br />Notes <br />Well 21-2 is a shallow alluvial monitoring well located downgradient from the test <br />mine ponds. <br />r~ <br />L <br />