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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 />MW449C C ND ND ND 12.2 21.02 95 85 95 4 0.01 <br />MW450C C ND 0.35 ND 12.41 19.70 128 108 128 4 0.01 <br />MW451CD CD ND ND ND 12.02 19.3 175 155 175 4 0.01 <br />Notes: <br />Results exceeding the aquifer cleanup level are shown in bold. <br />µg/L = micrograms per Liter <br />amsl = above mean sea level <br />bgs = below ground surface <br />btoc = below top of casing <br />CCl4 = Carbon Tetrachloride <br />ft = foot/feet <br />ND = nondetect <br />PCE = Tetrachloroethene <br />TCE = Trichloroethene <br />TOC = top of casing <br />Ahtna Environmental, Inc. Page 2 of 2