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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 Ethyl- <br /> No Date (feet msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW6 08/24/95 892 2649 -1757 000 <br /> 10/19/95 892 Well dry <br /> 02/13/96 892 Well dry <br /> 04/18/96 892 Well dry <br /> 08/08/96 892 Well dry <br /> 11/04/96 892 Well dry <br /> 02/03/97 892 Well dry <br /> 05/08/97 748 Well dry <br /> 08/26/97 748 Well dry <br /> 11/11/97 7 48 Well dry -- _- -- <br /> -_ <br /> 03/03/98 748 1555 -807 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/03/98 748 <2 0* <br /> 05/20/98 748 1485 -737 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 05/20/98 748 <2 0* <br /> 08/19/98 748 1671 -923 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 08/19/98 748 <2 0* <br /> 11/18/98 748 1716 -968 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/30/99 748 -- -- __ <br /> 05/05/99 748 1558 -8 10 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> 08/20/99 748 1681 -933 000 -- _- __ -_ _- <br /> 12/06/99 748 1370 -622 000 <1 <1 <1 <1 <50 <1 <br /> 02/29/00 748 1496 -748 000 <1 <1 <1 <1 <50 <1 <br /> 05/16/00 748 1478 -730 000 <1 <1 <1 <1 <50 <1 <br /> 09/11/00 748 17 18 -970 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 <br /> 12/13/00 748 1705 -957 000 <0 5 <0 5 <0 5 <0 5 140 <0 5 <br /> 03/08/01 748 1627 -879 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 <br /> 06/21/01 748 1272 -524 000 <0 5 056 <0 5 <0 5 <50 <0 5 <br /> MW7 07/16/87 835 18 11 -976 000 78 35 32 678 1,000 -- <br /> 04/11/88 835 2121 -12 86 000 26 <2 0 10 <40 1,200 <br /> 835 Well dry since 07/12/88 <br /> 835 Not accessible since 12/30/93 <br /> 05/11195 835 Well dry __ __ __ __ -_ <br /> e 1prolects1739421masterlwpVg6OlU942gu xls Page 10 of37 <br />