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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration( /L) Well Elevation to Water Elevation Thickness Ethyl- Numbei Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE MW2 09/20/01 749 1781 -1032 000 -- -_ -_ MW2 12/04/01 7 15 l7 79 -1064 000 096 <0 5 <0 5 <0 5 61 10* MW2 03/05/02 7 15 1655 -940 000 170 <0 5 <0 5 <0 5 101 h 1 90 MW2 03/05/02 7 15 <0 5* MW2 06/11/02 7 15 1749 -1034 000 -- -_ __ MW2 09/10/02 7 15 1860 -1145 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 MW2 12/18/02 7 15 1834 -11 19 000 1 1 <0 5 <0 5 <0 5 700 h <0 5 MW2 03/24/03 715 1786 -1071 0 00 130 <0 5 <0 5 <0 5 945 h <0 5 MW3 01/87 914 -- -- -- 17 640 -- 400 32,000 -- MW3 07/16/87 9 14 1926 -10 12 0 00 830 600 190 436 1,700 _- MW3 04/11/88 9 14 2243 -1329 000 450 970 210 860 4,600 MW3 09/13/88 9 14 24 95 -1578 004 Not sampled- LPH MW3 11/16/88 914 2327 -1413 000 <250 3,200 1,900 8,600 61,000 -- MW3 02/09/89 9 14 2541 -1627 Sheen Not sampled- LPH MW3 05/31/89 9 14 2643 -17 18 0 15 Not sampled- LPH MW3 08/17/89 914 28 12 -18 77 0 15 Not sampled- LPH MW3 12/19/89 9 14 2849 -1926 0 13 Not sampled- LPH MW3 03/21/90 9 14 2851 -1929 0 11 Not sampled- LPH MW3 9 14 Well dry since 45/17/90 MW3 02/17/94 9 14 28 92 -1978 000 MW3 05/10/94 9 14 29 14 -2000 0 00 MW3 08/02/94 9 14 Well dry MW3 11/01/94 914 WeiI dry -- MW3 02/17/95 9 14 Well dry -_ -- MW3 05/11/95 9 14 2559 -1645 000 97 24 42 11300 5,600 MW3 08/24/95 9 14 2449 -1535 000 45 5 9 19 440 2,600 MW3 10/19/95 9 14 Well dry -- -- -_ -- MW3 02/13/96 9 14 2529 -16 15 000 270 68 81 210 2,200 -- MW3 04/18/96 9 14 1940 -1026 000 80 9 5 25 45 1,000 17 MW3 08/08/96 9 14 2405 -1491 000 -- -- -- MW3 -MW3 11/04/96 9 14 24 05 -1491 000 g Vpro3ecls1739421ivaslerlwp\gO303U942gRa als Page 6 of 47