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w w w w wiw ■� tl_ ww w� � � � � � � � TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration ( /L,) Well Elevation to Water Elevation Thickness Ethyl- Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH- MTBE MW3 12/19/89 914 2849 -1926 0 13 Not sampled- LPH MW3 03/21/90 914 2851 -1929 0 11 Not sampled- LPH MW3 914 Well dry since 05/17/90 MW3 02/17/94 9 14 28 92 -1978 000 MW3 05/10/94 9 14 2914 -2000 000 MW3 08/02/94 9 14 Well dry MW3 11/01/94 9 14 Well dry MW3 02/17/95 914 Well dry __ _- __ __ _- MW3 05/11/95 9 14 2559 -1645 000 97 24 42 1,300 5,600 - MW3 08/24/95 914 2449 -1535 000 45 5 9 19 440 2,600 MW3 10/19/95 914 Well dry __ __ __ __ MW3 02/13/96 9 14 25 29 -1615 000 270 68 81 210 2,200 -- MW3 04/18/96 9 14 1940 -1026 000 80 9 5 25 45 1,000 17 MW3 08/08/96 9 14 24 05 -1491 000 -- __ __ -- MW3 11/04/96 9 14 2405 -1491 000 -- -- -- -- MW3 02/03/97 9 14 1963 -1049 000 180 4 6 48 110 1,400 24 MW3 05/08/97 854 1942 -1088 000 -- -- __ __ MW3 08/26/97 854 2120 -12 66 000 MW3 11/11/97 854 Well dry -_ __ __ _- __ -- MW3 03/03/98 854 1616 -762 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW3 03/03/98 854 <2 0* MW3 05/20/98 854 1602 -748 000 14 <0 5 <0 5 <0 5 170 <2 5 MW3 05/20/98 854 <2 0* MW3 08/19/98 854 1748 -894 000 5 9 2 2 <0 5 063 280 2 6 MW3 08/19/98 854 <2 0* MW3 H/18198 854 1793 -939 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW3 03/30/99 854 -- __ - MW3 05/05/99 854 1640 -786 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 MW3 08/20/99 8 54 1785 -931 000 -- -- -- MW3 12/06/99 854 1802 -948 000 -- _ - - - MW3 02/29/00 854 15 67 -7 13 000 MW3 05/16/00 854 1562 -708 000 -- -_ __ __ MW3 09/11/00 854 1798 -944 000 7 3 84 5 9 115 220 <0 5 MW3 12/13100 854 1760 -906 000 3 4 11 18 8 3 90 <0 5 g 1projects1739421masterlwplgO9O213942gw As Page 6 of 41