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Groundwater Well Installtion Work Plan <br />Table 2. Details for Existing Wells <br />in the Vicinity of New Extraction Wells and Monitoring Wells <br />Sharpe Army Depot <br />Lathrop, California <br />Well Name Zone <br />TCE <br />(µg/L; <br />3Q19) <br />PCE <br />(µg/L; <br />3Q19) <br />CCl4 <br /> (µg/L; <br />3Q19) <br />Depth to <br />Water <br />(ft btoc; <br />3Q19) <br />TOC <br />Elevation <br />(ft amsl) <br />Total Well <br />Depth <br />(ft bgs) <br />Screen <br />Beginning <br />Depth <br />(ft bgs) <br />Screen <br />End Depth <br />(ft bgs) <br />Casing <br />Diameter <br />(inches) <br />Screen <br />Slot Size <br />(inches) <br />EWA1 A 5.7 0.78 ND 8.27 17.23 31 19.35 29.35 8 0.02 <br />EWA3 A ND ND ND 11.58 19.93 30.8 15.4 30.8 8 0.02 <br />EWA5 A 18 ND ND 21.23 18.69 39.5 29.64 39.5 8 0.02 <br />EWCA1 A 1.4 ND ND 15.70 20.29 40 30 40 8 0.02 <br />EWNC4R C 2.9 0.59 ND 65.79 20.9 98 87.84 97.84 8 0.02 <br />EWNC5 C 2.4 ND ND <br />87.65 19.04 130.9 110.2 130.2 6 0.02 <br />EWNC6 C 1.3 1.3 ND 7.64 19.2 155 140 150 8 0.02 <br />MW527CR C ND ND ND 21.96 21.49 174.5 164 174 4 0.01 <br />MW527DR D ND ND ND 21.77 21.45 226.5 216 226 4 0.01 <br />MW325B B 20 ND ND 16.51 21.82 78.4 68 78 2 0.01 <br />MW446B B 1.2 ND ND 14 20.76 75 65 75 4 0.01 <br />MW455B B ND ND ND 27.56 21.95 65.5 55 65.5 4 0.01 <br />EWB1 B 43 ND ND 49.11 23.28 77.4 67.02 77.4 8 0.02 <br />MW401B B ND ND ND 13.53 24.21 66.35 55.95 66.35 4 0.01 <br />MW402B B ND ND ND 15.78 25.25 55.35 44.78 55.35 2 0.01 <br />MW427B B 17 ND ND 17.27 26.75 72.7 62.95 72.2 4 0.01 <br />MW434B B 39 ND ND 13.96 22.62 76.5 66 76 4 0.01 <br />MW418C C 2.3 3 ND 9.04 20.76 87.8 77.4 87.8 4 0.02 <br />MW448C C 13 ND ND 16.11 23.86 98 88 98 4 0.01 <br />MW448CD CD ND ND ND 16.12 23.97 165.5 155 165 4 0.02 <br />EWA1R (see Figure 12) <br />EWNC7 (see Figures 8 and 10) <br />MW544B and MW545B (see Figure 9) <br />MW543B (see Figure 9) <br />MW546C and MW547C (see Figure 10) <br />Ahtna Environmental, Inc. Page 1 of 2