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Groundwater Well Installation Work Plan Sharpe Army Depot <br /> Lathrop, California <br /> Table 2. Details for Existing Wells <br /> in the Vicinity of New Extraction and Monitoring Wells <br /> Depth to Screen <br /> TCE PCE CCI4 Water TOC Total Well Beginning Screen Casing Screen <br /> (µg/L; (µg/L; (µg/L; (ft btoc; Elevation Depth Depth End Depth Diameter Slot Size <br /> Well Name Zone 3Q21) 3Q21) 3Q21) 3Q21) (ft amsl) (ft bgs) (ft bgs) (ft bgs) (inches) (inches) <br /> EWC6(See Figure 6) <br /> EWC3 C 4.6 1.2 ND 23.28 19.97 96 86 96 8 0.02 <br /> EWC4 C 1.2 J- 0.3 J ND 43.91 19.88 137 116.55 136.55 6 0.02 <br /> EWC5 C 4.4 1.2 0.5 J 42.43 21.47 120.5 105 115 8 0.02 <br /> EWC7 (See Figure 6) <br /> EWC3 C 4.6 1.2 ND 23.28 19.97 96 86 96 8 0.02 <br /> EWC4 C 1.2 J- 0.3 J ND 43.91 19.88 137 116.55 136.55 6 0.02 <br /> EWC5 C 4.4 1.2 0.5 J 42.43 21.47 120.5 105 115 8 0.02 <br /> EWC8(See Figure 6) <br /> EWC3 C 4.6 1.2 ND 23.28 19.97 96 86 96 8 0.02 <br /> EWC4 C 1.2 J- 0.3 J ND 43.91 19.88 137 116.55 136.55 6 0.02 <br /> EWC5 C 4.4 1.2 0.5 J 42.43 21.47 120.5 105 115 8 0.02 <br /> EWCC2 C 4.8 ND 36.38 19.63 108.45 98.29 108.29 8 0.02 <br /> EWC9 (See Figure 6) <br /> EWC3 C 4.6 1.2 ND 23.28 19.97 96 86 96 8 0.02 <br /> EWC4 C 1.2 J- 0.3 J ND 43.91 19.88 137 116.55 136.55 6 0.02 <br /> EWC5 C 4.4 1.2 0.5 J 42.43 21.47 120.5 105 115 8 0.02 <br /> EWCC7 (see Figure 6) <br /> EWCC1 C 4.9 J- ND ND 71.31 19.78 145 134.97 144.86 8 0.02 <br /> EWCOR C 20 ND ND 89.81 11.28 141 114 134 8 0.02 <br /> EWCC4 C 0.6J ND ND 26.32 20.29 111 100.84 110.84 8 0.02 <br /> EWCCS C 50 ND ND 15.67 13.81 140 125 135 8 0.02 <br /> EWCC6 C 6 ND ND 21.73 18.58 140 125 135 8 0.02 <br /> Ahtna Environmental,Inc. Page 1 of 3 <br />