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s � • <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 msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW5 03/03/98 863 <2 0* <br /> 05/20/98 863 1560 -697 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 05/20/98 863 <2 0* <br /> 08/19/98 863 1745 -882 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 08/19/98 863 <2 0* <br /> 11/18/98 863 1798 -935 000 <05 <05 <05 <05 <50 <25 <br /> 03/30/99 863 -- -- -- __ _- <br /> 05/05/99 863 1641 -778 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> 08/20/99 8 63 1787 -924 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 12/06/99 863 18 16 -953 000 <1 <1 <1 <1 <50 <1 <br /> 02/29/00 863 15 59 -696 000 <1 <1 <1 <1 <50 <1 <br /> 05/16/00 863 1566 -703 000 <1 <1 <1 <1 <50 <1 <br /> 09/11/00 863 1801 -938 000 <05 <05 <05 <05 <50 <05 <br /> 12/13/00 8 63 1795 -932 000 <0 5 <0 5 <0 5 065 190 <0 5 <br /> 03/08/01 863 17 12 -849 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 <br /> 06/21/01 863 18.46 -9.83 0.00 <0 5 <0 5 <0.5 0.64 <50 <0 5 <br /> MW6 07/16/87 892 1935 -1043 000 3,100 4,300 1,200 6,600 12,000 -- <br /> 04/11/88 892 2304 -13 67 062 Not sampled -LPH <br /> 09/13/88 892 25 12 -1620 000 19,000 17,000 2,300 12,000 65,000 -- <br /> 11/16/88 892 25 51 -1658 001 19,000 19,000 3,000 12,000 83,000 -- <br /> 02/09/89 892 24 85 -15 93 Sheen Not sampled- LPH <br /> 05/31/89 892 2657 -1765 000 20,000 33,000 3,100 23,000 120,000 -- <br /> 08/17/89 892 2836 -1944 000 16,000 15,000 2,900 19,000 98,000 -- <br /> 12/19/89 892 28 80 -1988 000 -- -- -- -- -- <br /> 892 <br /> 892 Well dry since 03/21/90 <br /> 05/11/95 892 25 13 -1621 000 48 25 19 56 720 -- <br /> S 1projec[s1739421mssierlwp�g6O113942gw xls Page It o€45 <br />