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! s � <br /> 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 ms1) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE' <br /> i <br /> MW6 11/16/88 892 25 51 -1658 001 19,000 19,000 3,000 12,000 83,000 <br /> MW6 02/09/89 892 2485 -15 93 Sheen Not sampled- LPH <br /> MW6 05/31/89 892 2657 -1765 000 20,000 33,000 3,100 23,000 120,000 -- <br /> M W6 08/17/89 892 2836 -1944 000 16,000 15,000 2,900 19,000 98,000 -- <br /> MW6 12/19/89 892 2880 -1988 000 -- -- -- -- __ _7 <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 /> M W 6 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 -- -- -- -- -- -1 <br /> MW6 08/26/97 748 Well dry -- -- -- -- -- _' <br /> MW6 11111197 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 05/20/98 748 <2 0T, <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 /> a <br /> MW6 05/05/99 748 1558 -8 10 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> MW6 08/20/99 748 16 81 -9 33 000 -- -- -- -- - <br /> 11M)ILL I%g3942imasWili%p\g901%3942g%v xis Page 12 of 47 <br />