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TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration( /L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> _ (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> Num er Date feet feet feet feet) X <br /> ..,... <br /> MW 10 08/02/94 861 31 33 -2272 000 510 130 150 400 5,700 -- <br /> MW10 11/01/94 861 3176 -2315 000 4,100 16,000 1,600 7,500 64,000 -- <br /> MW I O 02/17/95 861 2929 -2068 000 1,300 4,400 780 2,500 21,000 -- <br /> MW 10 05/11/95 8 61 2646 -1785 000 360 750 230 480 6,300 -- <br /> MW 10 08/24/95 8 61 2758 -18 97 000 150 1,100 190 590 3,100 -- <br /> MW 10 10/19/95 861 2793 -1932 000 5 5 1 1 8 2 1 1 300 21 <br /> MW 10 02/13/96 861 25 67 -1706 000 1,600 15,000 1,400 6,500 64,000 -- <br /> MW10 04/18/96 8 61 2320 -1459 000 1,100 8,900 1,100 4,400 42,000 <500 <br /> M W 10 08/08/96 861 2427 -15 66 000 58 340 61 230 1,500 <50 <br /> MW 10 11/04/96 861 2451 -1590 000 140 3,400 410 1,600 15,000 <250 <br /> MW 10 02/03/97 861 2024 -11 63 000 1,500 18,000 2,100 9,500 66,000 1,800 <br /> MW 10 05/08/97 729 1928 -1199 000 40 51 64 110 1,300 38 <br /> MW 10 08/26/97 729 21 11 -13 82 000 2 1 14 3 7 <0 5 63 <2 5 <br /> MW 10 11/11/97 729 2162 -1433 0 00 1 8 060 0 84 <0 5 <50 3 1 <br /> MW 10 03/03/98 729 1630 -9 01 000 360 7,800 1,300 5,000 23,000 940 <br /> MW 10 03/03/98 729 <200* <br /> MW 10 05/20/98 729 1562 -833 000 8 1 85 11 100 630 <5 0 <br /> MW 10 05/20/98 7 29 <2 0* <br /> MW 10 08/19/98 729 1706 -977 000 077 <0 5 <0 5 <0 5 <50 <2 5 <br /> MW 10 08119198 7 29 <2 0* <br /> MWIO 11/18/98 729 1747 -10 18 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> MW 10 03/30/99 729 15 54 -825 000 -- -- -- -- -- -- <br /> MW 10 05/05/99 729 15 84 -8 55 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> MW 10 08/20/99 729 -- -- -- -- -- -- -- -- -- <br /> MW 10 12/06/99 729 1766 -1037 000 -- -- -- -- -- -- <br /> MW 10 02/29/00 729 1534 -8 05 000 <1 <1 <1 <1 <50 <1 <br /> M W 10 05/16/00 729 1542 -8 13 000 -- -- -- -- -- -- <br /> M W 10 09/11/00 729 1743 -10 14 000 0 8 2 <0 5 197 50 <0 5 <br /> MW10 12/13/00 729 1729 -1000 000 <05 <05 <05 <05 62 <05 <br /> MW i O 03/08/01 729 1654 -925 000 <0 5 <0 5 <0 5 <0 5 78 <0 5 <br /> MW 10 06/21/01 729 1792 -1063 000 <0 5 <0 5 <0 5 <0 5 <50 12 <br /> MW 10 06/21/01 729 <5* <br /> G IProjects`739421NIASTERIWP\WP0303%33942gw xis Page 19 of45 <br />