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TABLE 1 WELL CONSTRUCTION DETAILS Former Apache Plastics 2050 East Fremont Street, Stockton , California Installation Borehole Total Depth Casing Casing Slot Size Casing Screen Filter Pack Bentonite Grout Well ID Diameter Diameter Material Filter Pack Elevation Interval Interval Interval Interval Date (inch) (feet bsg) (inch) (schedule) (inch) (feet MSL) (feet bsg) (feet bsg) (feet bsg) (feet bsg) SHALLOW-ZONED WELLS Screened between 34 feet bsg and 70 feet bsg) MW-2 08-31 -1989 12 70 4 PVC 40 0. 020 #3 18. 12 52 to 66 58. 5 to 66 49 to 50.5 0.5 to 49 MW-4 09-25-1989 8 71 .5 2 PVC 40 unknown #3 16.61 56 to 68. 5 55 .5 to 68.5 54 to 55.5 0.5 to 54 MW-5 06-12-1990 8 70.5 2 PVC 40 0. 020 #3 18. 91 55 to 70 53 to 70. 5 50 to 53 1 to 50 MW-6 06-01 -1990 8 70 2 PVC 40 0.020 #3 18.54 60 to 70 57 to 70 55 to 57 'Tto 55 MW-7 06-09-1990 8 70 2 PVC 40 0.020 #3 18.45 49 to 69 47 to 70 44.5 to 47 2 to 44.5 MW-15 03-20-2004 8 60 2 PVC 40 0. 020 #3 17.32 40 to 60 38 to 60 35 to 38 1 to 35 MW-19 03-28-2008 8 55 2 PVC 40 0. 020 #2/12 17.75 40 to 55 38 to 55 35'tom ITto 35 MID-ZONED WELLS (Screened between 85 feet bsg and 90 feet bsg) MW-16 03-30-2004 8 90 2 PVC 40 0. 020 #3 17.46 85 to 90 83 to 90 77 to 83 1 to 77 MW-18103-31 -20041 8 1 90 1 2 1 PVC 40 1 0. 020 1 #3 1 17. 87 1 85 to 90 83 to 90 77 to 83 1 to 77 DEEP-ZONED WELLS (Screened between 94 feet bsg and 125 feet bsg) MW-8 02-22-1999 8 108 2 PVC 40 0.020 #3 17.88 96 to 105 94 to 106 91 to 94 0. 5 to 91 MW-9 02-24-1999 8 105 2 PVC 40 0.020 #3 18.22 94 to 104 93 to 105 90 to 93 0.5 to 91 MW-10 03-07-2001 8 110 2 PVC 40 0. 020 #3 18.39 98 to 109.5 96 to 98 1 to 96 MW-11 03-12-2001 8 110 2 PVC 40 0. 020 #3 17.67 97 to 109.5 94 to 97 1 to 94 MW-13 04-12-2006 8 115 2 PVC 40 0. 010 #2/12 18. 15 105 to 115 102 to 115 99 to 102 0.5 to 99 MW-14 04-14-2006 8 115 2 PVC 40 0. 010 #2/12 17. 50 105 to 115 103 to 115 100 to 103 1 to 100 MW-17 03-29-2004 8 121 2 PVC 40 0. 020 #3 17.49 104 to 119 102 to 119 97 to 102 1 to 97 MW-20 03-27-2004 8 125 2 PVC 40 0.020 #2/12 18.83 115 to 125 111 to 125 108 to 111 1 to 108 REMEDIATION WELLS VEW-1 32 z 10-31 -1991 8 32 2 PVC 40 see note 2 #3 18. 16 see note 2 29 to 32 27 to 29 0.5 to 27 VEW-1 (65)3 10m31 -19911 8 65 2 PVC 40 see note 3 #3 18.23 see note 3 62 to 65 60 to 62 0.5 to 60 VEW-2 10-23-1996 8 55 2 PVC 40 0. 020 #3 18. 01 34.5 to 54 34 to 54 31 to 34 0.5 to 31 EW-1 1 122 4 PVC 80 0. 030 #3 18.70 101 to121 97 to 121 1 94 to 97 0.5 to 94 Advanced GcoEnvironmental, Inc.