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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 /> No Date (feet msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW 11 03/03/98 10 15 <2 0* <br /> 05/20/98 1858 -843 000 <0 5f <0 5f <0 5f <0 5f <50f <2 5f <br /> 05/20/98 <2 0* <br /> 08/19/98 1994 -979 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 08/19/98 <2 0* <br /> 11/18/98 2028 -10 13 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/30/99 1826 -8 11 000 -- -- -- __ -- -- <br /> 05/05/99 1848 -833 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> 12/06/99 2037 -1022 000 -- -- -- -- __ -- <br /> 02/29/00 1829 -8 14 000 <1 <1 <1 <1 <50 <1 <br /> 05/16/00 1849 -834 000 -- -- -- __ -- <br /> 03/08/01 -- -- -- <br /> MW 12 01/30/91 9 16 3539 -2623 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 05/02/91 3545 -2629 000 <0 3 <0 3 <0 3 <1 <50 -- <br /> 07116-17191 3637 -2721 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 10/15/91 3695 -2779 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 01/28/92 35 21 -2605 000 <0 5 0 6 <0 5 0 7 <50 -- <br /> 04/30/92 34 83 -2567 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 08/13/92 3682 -2766 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 10/08/92 3754 -2838 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 02/23/93 3445 -2529 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 05/18/93 Not Accessible -- -- -- -- -- <br /> 08/22/93 Not Accessible <br /> 12/30/93 Not Accessible -- -- -- -- -- _- <br /> 02/17/94 Not Accessible -- -- -- -- -- <br /> 05/10/94 31 05 -21 89 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> t 5pro3eats1734421tuasterluplg30113942gw xls Page 20 of 41 <br />