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i • • <br /> 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 /> No Date (feet msl) (feet) (feet ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW2 02/09/89 877 2902 -2025 000 480 55 660 1,700 7,200 -- <br /> 05/31/89 877 2569 -1692 000 680 62 800 3,100 17,000 -- <br /> 08/17/89 877 2733 -1856 000 2,100 430 350 1,700 15,000 -- <br /> 12/19/89 877 2768 -1891 000 -- -- -- -- -- <br /> 877 <br /> 877 Well dry since 03/21/90 <br /> 05/11/95 877 2419 -1542 000 34 41 83 1,000 5,200 -- <br /> 08/24/95 877 2280 -1403 000 80 <5 0 150 130 2,800 -- <br /> 10/19/95 877 2599 -1722 000 24 <5 0 48 13 1,300 <25 <br /> 02/13/96 877 23 84 -1507 000 49 <2 5 65 17 1,300 -- <br /> 04/18/96 8 77 2098 -1221 000 -- -- -- -- <br /> 08/08/96 877 2275 -13 98 000 19 <0 5 41 11 490 6 8 <br /> 11/04/96 877 2277 -1400 000 25 <0 5 65 14 810 21 <br /> 02/03/97 877 1861 -984 000 -- -- _- -- -- -- <br /> 05/08/97 749 1825 -1076 000 12 <0 5 1 1 <0 5 73 <2 5 <br /> 08/26/97 749 2003 -1254 000 -- -- -- -- -_ -- <br /> 11/11/97 749 2056 -1307 000 3 2 <0 5 3 4 071 160 5 2 <br /> 03/03/98 749 1490 -741 000 14 <0 5 12 <0 5 110 3 3 <br /> 03/03/98 749 <2 0* <br /> 05/20/98 749 14 86 -737 000 15 <0 5 1 1 <0 5 110e 4 1 <br /> 05/20/98 749 <2 0* <br /> 08/19/98 749 1636 -8 87 000 <0 5 2 1 12 <0 5 110 <2 5 <br /> 08/19/98 749 <2 0* <br /> 11/18/98 749 1673 -924 000 -- -- -- -- -- -- <br /> 03/30/99 749 -- -- -- -- -- -- -- -- -_ <br /> 05/05/99 749 1520 -771 000 -- -- -- -- -- -- <br /> 08/20/99 749 1668 -9 19 000 10 1 4 56 808 242 253 68 1 <br /> 12/06/99 749 1688 -939 000 <1 <1 <1 <1 52 <1 <br /> tiprojects1739421rnastenAplg60113942gw As Page>of 46 <br />