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TABLE 1 <br /> WELL CONSTRUCTION DETAILS <br /> FORMER CURTIS PONTIAC-BUICK <br /> 2450 Toste Road,Tracy, California <br /> Well Borehole Total Casing Casing Casing Filterpack Grout <br /> Installation Date Slot Size Screen Interval Bentonite Interval Interval <br /> I.D. Diameter Depth Diameter Material Elevation Interval <br /> MW-1A 2/13/1998' 8-inch 28 ft 2-inch PVC I 0.02-inch 1 37.20 1 22 to 27 It 21 to 27 ft 19 to 21 ft %to 19 ft <br /> MW-1B 2/13/1998' 8-inch 15 ft 2-inch PVC 1 0.02-inch 37.00 5 to 15 ft 3 to 15 ft 1 to 3 It '/.to 1 ft <br /> MW-2A 02/12/98 10-inch 28 ft 2-inch PVC 0.02-inch 36.25 25 to 30 it 22 to 30 ft 15 to 22 ft %to 1 It <br /> MW-213 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 %a to 1 ft <br /> MW-3 02/12/98 8-inch 1511 2-inch PVC 0.02-inch 37.84 1 5 to 15 ft 3 to 15 It 1 to 3 ft Yz to 1 ft <br /> MW-4 11/18/1999' 8-inch 1511 2-inch PVC 0.02-inch 36.51 5 to 15 ft 3 to 15 ft 1 to 3 I %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 '%to 1 ft <br /> MW-6 02/12/98 8-inch 1 15 It 2-inch PVC 0.02-inch 37.88 5 to 15 It 3 to 15 ft 1 to 3 ft Y to 1 ft <br /> MW-7 11/19/1999' 8-inch 1 41 ft 2-inch PVC 0.02-inch 36.88 36 to 41 It 34 to 41 ft 34 to 36 ft %to 34 ft <br /> OW-1 01/26/11 8-inch 1 16 ft 1-inch PVC&MD 50 micron 13 to 15 ft 11 to W ft 7 to 11 It %to 7 It <br /> OW-2 01/26/11 8-inch 1 16 ft 1-inch PVC&MD 50 micron - 13 to 15 ft 11 to 16 ft 7 to 11 ft %to 7 ft <br /> OW-3 01/26/11 8-inch 1 16 ft 1-inch PVC&MD 50 micron 13 to 15 ft 11 to 16 ft 7 to 11 ft %to 7 It <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 %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 ft 6 to 10 ft '/2 to 6 ft <br /> OW-6 01/27/11 8-inch 16 1-inch PVC&MD 50 micron - 1 12 to 14 ft 10.5 to 16 ft 7 to 10.5 ft %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 7 to 11 ft %to <br /> OW-6 01/27/11 8-inch 16 1-inch PVC&MD 50 micron - 13 to 15 ft 11 to 16 ft 7 to 11 ft 'h to 71 <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 to <br /> OW-10 01/27/11 8-inch 16 1-inch PVC&MD 50 micron - 13 to 15 ft 11 to 16 ft 7 to lift /.to <br /> Notes: <br /> ft: feet below surface grade <br /> PVC: polyvinylchloride <br /> ':monitoring wells destroyed for over exacation and re-installed following exacavation completion on 30 June 2003. <br /> MD:50 micron diffuser <br /> Advanced Ge Environmental,Inc. <br />