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TABLE I 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 EthyI- <br /> No Date (feet MSI) (feet) (feet ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW4 05/17/90 8 13 2887 -2074 000 300 40 150 93 3,500 -- <br /> 01/28/92 813 Dry __ _- __ __ _- <br /> 04/30/92 8 13 2953 -2140 000 <br /> 08/13/92 813 Dry <br /> 10/08/92 813 Dry <br /> 02/23/93 8 13 29 12 -2099 000 <br /> 05/18/93 813 -- -- -- <br /> 08/22/93 8 13 2804 -1991 000 <br /> 12/30/93 8 13 2785 -1972 000 <br /> 02/17/94 8 13 2749 -1936 000 <br /> 05/10/94 8 13 2717 -1904 000 <br /> 08/02/94 8 13 2863 -2050 000 <br /> 11/01/94 8 13 2898 -20 85 000 -- -- __ -- -_ <br /> 02/17/95 8 13 2641 -1828 000 6 4 <0 5 3 2 3 4 880 -- <br /> 05/11/95 8 13 23 84 -1571 000 91 <1 0 8 7 29 520 -- <br /> 08/24/95 8 13 2522 -1709 000 28 20 35 7 2 870 -- <br /> 10/19/95 8 13 2570 -1757 000 19 <5 0 18 6 0 1,000 <25 <br /> 02/13/96 8 13 2348 -1535 000 4 4 <1 0 12 1 1 750 -- <br /> 04/18/96 8 13 21 17 -1304 000 10 <1 0 12 1 0 430 <5 0 <br /> 08/08/96 8 13 2241 -1428 000 4 4 <0 5 5 2 <0 50 450 7 4 <br /> 11/04/96 8 13 2280 -14 67 000 <0 5 <0 5 5 3 <0 5 730 15 <br /> 02/03/97 8 13 1832 -1019 000 9 3 <2 0 11 3 5 1,400 17 <br /> 05/08/97 7 18 1792 -1074 000 13 0 83 3 5 <0 5 780 10 <br /> 08/26/97 7 I8 1971 -1253 000 7 6 <1 0 <1 0 <1 0 440 c 12 <br /> 11/11/97 7 18 2022 -13 04 000 <2 0 <2 0 <2 0 <2 0 720 c <10 <br /> 03/03/98 7 18 14 57 -739 000 8 9 080 0 58 <0 5 640 13 <br /> 03/03/98 7 18 6 0* <br /> 05/20/98 7 18 1455 -737 000 15 <5 0 35 9 1 1,100 <25 <br /> 05/20/98 7 18 65* <br /> 08/19/98 7 18 1606 -8 88 000 1 1 16 4 3 <0 5 680 <2 5 <br /> 08/19/98 7 18 7 7* <br /> 11/18/98 7 18 1640 -922 000 <0 5 14 5 4 <0 5 770 c 15 <br /> 03130/99 718 -- -- -- -- -- -- -- -- <br /> g+projects1739421master%wp\g60113942gw xis Page 7 of 37 <br />