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Table 1 <br />March 2021 Depth to Groundwater Measurements and Groundwater Elevations <br />Holcim (US) Inc. <br />Florence, Colorado <br />Well <br />Number <br />Well <br />Diameter <br />(inches) <br />TOC <br />Elevation <br /> (ft amsl) <br />Depth to GW <br />March 2021 <br />(ft btoc) <br />Depth to <br />Well Bottom <br />March 2021 <br />(ft btoc) <br />GW Elevation <br />March 2021 <br />(ft amsl) <br />Total <br />Depth <br /> (ft bgs) <br />Screened <br />Interval <br />(ft bgs) <br />MW-7 4 5056.26 27.54 50.30 5028.72 47 17-42 <br />MW-9 4 5121.90 7.93 45.55 5113.97 42 17-37 <br />MW-11 2 5095.87 54.48 105.65 5041.39 103 58-103 <br />MW-12 2 5254.04 101.26 150.30 5152.78 148 103-148 <br />MW-13 2 5040.00 12.80 31.95 5027.20 30 15-30 <br />P-2 1.5 5079.46 4.82 29.05 5074.64 36 31-36 <br />P-3 1.5 5063.28 27.78 39.45 5035.50 37 32-37 <br />DP-1 2 5069.70 12.93 36.50 5056.77 34 24-34 <br />NP-1 2 5147.40 44.65 73.50 5102.75 70 60-70 <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 March 18, 2021 <br />Page 1 of 1