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Well <br />Number <br />Well <br />Diameter <br />(inches) <br />TOC Elevation <br />(ft amsl) <br />Depth to GW <br />September <br />2012 (ft btoc) <br />Depth to Well <br />Bottom <br />September <br />2012 <br />(ft btoc) <br />GW Elevation <br />September <br />2012 <br />(ft amsl) <br />Total Depth <br />(ft bgs) <br />Screened Interval <br />(ft bgs) <br />MW -7 <br />4 <br />5056 26 <br />24.99 <br />50.30 <br />5031.27 <br />47 <br />17-42 <br />MW -9 <br />4 <br />5121.90 <br />7.86 <br />45.55 <br />5114.04 <br />42 <br />17 -37 <br />MW -11 <br />2 <br />5095.87 <br />54.03 <br />105.65 <br />5041.84 <br />103 <br />58 -103 <br />MW -12 <br />2 <br />5254.04 <br />98.94 <br />150 30 <br />5155.10 <br />148 <br />103 -148 <br />MW -13 <br />2 <br />5040.00 <br />17.91 <br />3195 <br />5022.09 <br />30 <br />15 -30 <br />P -2 <br />1.5 <br />5079.46 <br />4.56 <br />29.05 <br />5074.90 <br />36 <br />31 -36 <br />P -3 <br />1.5 <br />5063.28 <br />26.10 <br />39 45 <br />5037.18 <br />37 <br />32 -37 <br />Table 1 <br />September 2012 Depth to Groundwater Measurements and Groundwater Elevations <br />Notes: <br />ft amsl - Feet above mean sea level <br />ft bgs - Feet below ground surface <br />ft btoc - Feet below top of casing. <br />GW - Groundwater. <br />MW - Monitoring well. <br />NA - Not available. <br />P - Piezometer <br />TOC - Top of casing. <br />Groundwater levels measured on September 28, 2012 <br />Holcim (US) Inc. <br />Florence, Colorado <br />C \ Users \Iyusko \Documents \Holcim\2012 MW -7 Redevelop \Summary Letter \Tables 12_112720121y.xls Page 1 of 1 <br />