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TABLE 1 Well Construction Details ARCO Service Station No.2133 and Chevron Service Station No.9-4275 2908 2905 West Benjamin Holt Drive Stockton,California Boring Cement Elevation Borehole Casing Screened Filter Pack Well I.D. Construction (TOC feet Depth Diameter Diameter Casing Slot Size Interval(feet Interval(feet Bentonite Seal Seal Comments Date MSL) ((fest (inches) (inches) Material (inches) bgs) bgs) Interval(feet bgs) Interval feet bgs] om or n e s E-1 5/24/84 - 24.5 3 PVC 8-23 5-32 1-5 0-1 Destroyed June 1994 E-2 5/24/84 3.92 21.5 3 PVC 6-21 5-21 1-5 0-1 E-3 5/24/84 3.34 25 4 PVC 17-24 5-24 1-5 0-1 E-4 5/24/84 3.32 29.5 3 PVC 5-22 5-22 1-5 0-1 E-5 5/24/84 3.49 21 3 PVC 5-22 3-21 1-3 0-1 E-6 5/24/84 2.77 19.5 3 PVC 4.5-19.5 4-19.5 1-4 0-1 E-7 5/30/84 2.27 20 3 PVC 5-20 4-20 0-4 0-0 E-8 5/30/84 2.01 30.5 3 PVC 4-24 4-24 0-4 0-0 E-9 5/30/84 2.60 22.5 3 PVC 5-19.5 4-19 0.4 0-0 E-10 5/30/84 2.01 25.25 3 PVC 8-25 7-25 0-7 0-0 E-11 5/30/84 4.46 24 3 PVC 4-24 3-24 0-3 0-0 E-12 5/30/84 2.99 30 3 PVC - 6-23 5-23 0-5 0-0 BHD-1 1/21/88 1.24 31.5 4 PVC 0.020 8-28 6-28 1-6 0-1 BHD-2 1/22/88 1.93 31.5 4 PVC 0.020 8-28 6-28 1-6 0-1 PR-1 1/19/88 1.87 31.5 4 PVC 0.020 8-28 6-28 1-6 0-1 PR-2 1/19/88 1.72 31.5 4 PVC 0.020 8-28 6-28 1-6 0-1 MW-1 10/11/93 2.31 30 10 4 PVC 0.020 10-30 8-30 5-8 0-5 MW-2 10/19/93 2.16 28.5 10 4 PVC 0.020 8.5-28.5 6-28.5 3.5-6 0-3.5 MW-3 12/21/94 3.33 30 10 2 PVC 0.020 9.5-29.5 - - - MW-4 12/21/94 3.58 30 10 2 PVC 0.020 8.5-28.5 Destroyed June 2007 MW-5 12/22/94 2.01 30 10 2 PVC 0.020 10-30 Remediat on Wells r R-1 7/24/84 - 42 - 12 PVC - 9-35 8-40 - - V-1 10/13/93 1.94 24 10 4 PVC 0.030 4-24 3-24 2-3 0-2 V-2 10/12/93 1.47 25 10 4 PVC 0.030 4-24 3-25 2-3 0-2 V-3 10/12/93 1.56 25 10 4 PVC 0.030 4-24 3-25 2-3 0-2 V-4 10/14/93 2.24 25 10 4 PVC 0.030 4-24 3-24 2-3 0-2 V-5 10/18/93 3.26 25 10 4 PVC 0.030 4.5-24.5 3-25 2-3 0-2 V-6 10/14/93 2.34 23 10 4 PVC 0.030 3-23 2-23 1-2 0-1 V-7 10/15/93 2.16 25 10 4 PVC 0.030 4-24 3-24 2-3 0-2 V-8 8/15/94 21.5 10 2 PVC 0.030 6-21 5-21 3-5 0-3 V-9/S-7 8/15/94 31.5 - 1 PVC 0.020 6-21/27.5-30 5-21/26.5-30 3-5/21-26.5 0-3 V-10/S-8 8/16/94 31.5 - 2/1 PVC 0.020 6-21/27.5-30 5-21/26.5-30 3-5/21-26.5 0-3 V-11 8/15/94 2.95 21.5 10 2 PVC 0.030 5-21 4-21 2-4 0-2 V-12 8/16/94 1.21 21.5 - 2 PVC - 6-21 5-21 3-5 0-3 S-1 10/12/93 0.90 25 1 PVC Sch.40 0.020 22-24 19-25 14-19 0-14 S-2 10/13/93 1.75 25 1 PVC Sch.40 0.020 23-25 20-25 15-20 0-15 S-3 10/15/93 2.30 25 1 PVC Sch.40 0.020 23-25 19-25 12-19 0-12 S-4 10/15/93 1.39 24.5 6 1 PVC Sch.40 0.020 22-24 18.5-24 15.5-18.5 0-15.5 S-5 10/18/93 2.58 24.5 6 1 PVC Sch.40 0.020 20-22 19-24 15-19 0-15 S-6 10/19/93 4.25 25 - 1 PVC Sch.40 0.020 23-25 20-25 16-20 0-16 S-9 8/16/94 1.73 30 1 PVC Sch.40 0.020 27.5-30 26.5-30 21-26.5 0-21 I i Well Construction Details.xls 1 oft SECOR 1