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i • ! <br /> 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 Ethyl- <br /> No Date (feet msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW6 11/16/88 892 25 51 -1658 001 19,000 19,000 3,000 12,000 83,000 -- <br /> 02/09/89 2485 -15 93 Sheen Not sampled-LPH <br /> 05/31/89 2657 -1765 000 20,000 33,000 3,100 23,000 120,000 -- <br /> 08/17/89 2836 -1944 000 16,000 15,000 2,900 19,000 98,000 -- <br /> 12/19/89 2880 -1988 000 -- -- -- -- -- <br /> Well dry since 03/21/90 <br /> 05111/95 25 13 -1621 000 48 25 19 56 720 -- <br /> 08/24/95 2649 -1757 000 -- -- -- -- -- <br /> 10/19/95 Well dry -- -- -- -- _- -_ <br /> 02/13/96 Well dry <br /> 04/18/96 Well dry <br /> 08/08/96 Well dry <br /> 11/04/96 Well dry <br /> 02/03/97 Well dry <br /> 05/08/97 748 Well dry -- -- -- -- -- __ <br /> 08/26/97 Well dry <br /> 11/11/97 Well dry -- -- -- -- -- -- <br /> 03/03/98 1555 -807 000 <05 <05 <05 <05 <50 <25 <br /> 03/03/98 <2 0* <br /> 05/20/98 1485 -737 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 05/20/98 <2 0* <br /> 08/19/98 1671 -923 000 <05 <05 <05 <05 <50 <25 <br /> 08/19/98 <2 0* <br /> 11/18/98 17 16 -9 68 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 05/05/99 1558 -8 10 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> 08/20/99 16 81 -933 000 -- -- -- -- -- -- <br /> 12/06199 1370 -6 22 000 <1 <1 <1 <1 <50 <1 <br /> f/projects\73942\uiasler%wp\9301\3942gw AS pa6e 11 of 41 <br />