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r <br /> TABLE 1 <br /> WELL CONSTRUCTION DETAILS <br /> FORMER CURTIS PONTIAC-BUICK <br /> 2450 Toste Road, Tracy, California <br /> Well Installation Date Borehole Total Casing Casing Slot Size Casing Screen Interval Filterpack Bentonite Interval Grout <br /> 1.D. Diameter Depth Diameter Material Elevation Interval Interval <br /> MW-1A 2/13/1998" 8-inch 28 ft 2-inch PVC 0.02-inch 37.20 22 to 27 ft 21 to 27 ft 19 to 21 ft '%to 19 ft <br /> MW-1 B 2/13/1998' 8-inch 15 ft 2-inch PVC 0.02-inch 37.00 5 to 15 ft 3 to 15 ft 1 to 3 ft M.to 1 ft <br /> MW-2A 02/12/98 10-inch 28 ft 2-inch PVC 0.02-inch 36.25 25 to-30It 22 to 30 ft 15 to 22 ft %to 1 ft <br /> MW-2B 02/12/98 10-inch 15 ft 2-inch PVC 0.02-inch 36.31 5 to 15 ft 3 to 15 ft 1 to 3ft '/2 to 1 ft <br /> MW-3 02/12/98 8-inch 15 ft 2-inch PVC 0.02-inch 37.84 5 t 15 ft 3 to 15 ft 1 to 3ft '/2 to 1 ft <br /> MW-4 11/18/1999' 8-inch 15 ft 2-inch PVC 0.02-inch 36.510.02-inch <br /> 15 ft 3 to 15 ft 1 to 3ft %2 to 1 ft <br /> MW-5 02/13/98 8-inch 15 ft 2-inch PVC 0.02-inch 37.39 5 to 15 ft 3 to 15 ft 1 to 3ft %2 to 1 ft <br /> MW-6 1 02/12/98 8-inch 15 ft 2-inch PVC 0.02-inch 37.88 5 to 15 ft 3 to 15 ft 1 to 3ft %2 to 1 ft <br /> MW-7 1 11/19/1999- -inch 1 41 ft 2-inch PVC 0.02-inch 36.88 36 to 41 ft 34 to 41 ft 34 to 36 ft M.to 34 ft <br /> OW-1 1/26/11 8-inch 16 ft 1-inch PVC&MD 50 micron - - 13 to 15 ft 11 to 16 ft 7 to 11 ft %2 to 7 ft <br /> OW-2 01/26/11 8-inch 16 ft 1-inch PVC&MD 50 micron - 13 to 15 ft 11 to 16 ft 7 to 11 ft %2 to 7 ft <br /> OW-3 01/26/11 8-inch 16 ft 1-inch PVC&MD 50 micron - 13 to 15 ft 11 to 16 It 7 to 11 It '%to 7 ft <br /> OW-4 01/26/11 8-inch 15.5 1-inch PVC&MD 50 micron 13 to 15 ft 11 to 15.5 ft 7 to 11 ft %2 to 7 ft <br /> OW-5 01/26/11 8-inch 15 1-inch PVC&MD 50 micron 12 to 14 ft 10 to 15 It 6 to 10 ft %to 6 ft <br /> OW-6 01/27/11 8-inch 16 1-inch PVC&MD 50 micron - 12 to 14 ft 10.5 to 16 ft 7 to 10.5 ft '/2 to 7 ft <br /> OW-7 01/27/11 8-inch 16 1-inch PVC&MD 50 micron 12.5 to 14.5 ft 11 to 16 ft 7t 11 ft '/2 to 7 ft <br /> OW-8 01/27/11 8-inch 16 1-inch PVC&MD 50 micron 13 to 15 ft 11 to 16 ft 7 to 11 ft 72 to 7 ft <br /> OW-9 01/27/11 8-inch 16 1-inch PVC&MD 50 micron - 13 to 15 ft 11 to 16 ft 7 to 11 ft I '%to 7 ft <br /> OW-10 01/27/11 8-inch 1 16 1-inch PVC&MD 50 micron 13 to 15 It 11 to 16 ft 7 to 11 ft '/2 to 7 ft <br /> Notes: <br /> ft: feet below surface grade <br /> PVC: polyvinylchloride <br /> *:monitoring wells destroyed for over eracation and re-installed following exacsvation completion on 30 June 2003. <br /> MD:50 micron diffuser <br /> Advanced GeoEnvironmental,Inc. <br />