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TABLE 2 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration(µg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW6 09/13/88 892 25 12 -1620 000 19,000 17,000 2,300 12,000 65,000 <br /> MW6 11/16/88 892 25 51 -16 58 001 19,000 19,000 3,000 12,000 83,000 -- <br /> MW6 02/09/89 892 24 85 -1593 Sheen Not sampled- LPH <br /> MW6 05/31/89 892 2657 -1765 000 20,000 33,000 3,100 23,000 120,000 <br /> MW6 08/17/89 892 2836 -1944 000 16,000 15,000 2,900 19,000 98,000 - <br /> MW6 12/19/89 892 2880 -19 88 000 -- -- __ <br /> MW6 892 Well dry since 03/21/90 <br /> MW6 05/11/95 892 25 13 -1621 000 48 25 19 56 720 <br /> MW6 08/24/95 892 2649 -1757 000 -- <br /> MW6 10/19/95 892 Well dry <br /> MW6 02/13/96 892 Well dry -- <br /> MW6 04/18/96 892 Well dry <br /> MW6 08/08/96 892 Well dry <br /> MW6 11/04/96 892 Well dry <br /> MW6 02/03/97 892 Well dry <br /> MW6 05/08/97 748 Well dry <br /> MW6 08/26/97 748 Well dry -- <br /> MW6 11/11/97 748 Well dry __ __ __ _- -- -- <br /> MW6 03/03/98 748 15 55 -807 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> MW6 03/03/98 748 <2 0* <br /> MW6 05/20/98 748 1485 -737 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> MW6 05/20/98 7 48 <2 0* <br /> MW6 08/19/98 748 1671 -923 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> MW6 08/19/98 748 <2 0* <br /> MW6 11/18/98 748 17 16 -968 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> MW6 03/30/99 748 -- __ <br /> MW6 05/05/99 748 15 58 -8 10 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> MW6 08/20/99 748 16 81 -933 000 -- __ __ <br /> MW6 12/06/99 7 48 1370 -622 0 00 <1 <1 <1 <1 <50 <1 <br /> MW6 02/29/00 748 1496 -748 000 <1 <1 <1 <1 <50 <1 <br /> MW6 05/16/00 748 1478 -730 000 <1 <1 <1 <1 <50 <1 <br /> MW6 0911 i/00 748 17 18 -970 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 <br /> g lprojects1739421masterlwp\g46O213942gw x,s <br /> Page 1 l of 43 <br />