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0 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-g MTBE i MW3 09/10/02 8 51 <0 5* MW3 12/18/02 851 1997 -1146 000 2 8 2 1 1 6 4 7 323 h <0 5 MW3 03/24/03 851 1940 -1089 000 -- __ __ -_ __ MW3 03/25/03 851 -- -- -- 500 1 8 4 0 5 6 755 h <0 5 MW3 06/11/03 8 51 1956 -1105 000 18.2 61 14 8 123 1,510 h 34 4 MW3 06/11/03 851 <0 5* MW4 07/16/87 8 13 1815 -1002 000 1,I00 <50 850 1,750 4,900 -- MW4 04/11/88 813 2123 -1310 000 510 <25 490 1,100 8,500 -- MW4 09/13/88 8 13 2366 -1553 000 860 40 670 2,400 5,600 -- MW4 11/16/88 8 13 2381 -1568 000 860 340 810 1,000 8,000 -- MW4 02/09/89 8 13 2355 -1542 000 630 20 530 650 4,800 -- MW4 05/31/89 8 13 2501 -1688 000 790 35 720 1,300 6,000 -- MW4 08/17/89 8 13 2650 -18 37 000 1,000 45 940 1,100 8,100 -- MW4 12/19/89 8 13 2757 -1944 000 190 2,800 1,100 380 7,900 -- MW4 03/21/90 8 13 2806 -1993 000 400 6 8 340 160 3,200 -- MW4 05/17/90 8 13 2887 -2074 000 300 40 150 93 3,500 -- MW4 01/28/92 813 Dry __ __ -_ __ __ MW4 04/30/92 8 13 2953 -21 40 000 _- MW4 08/13/92 813 Dry MW4 10/08/92 813 Dry MW4 02/23/93 8 13 2912 -2099 000 MW4 05/18/93 813 -- -- __ MW4 08/22/93 8 13 28 04 -1991 000 MW4 12/30/93 8 13 27 85 -1972 000 MW4 02/17/94 8 13 2749 -1936 000 MW4 05/10/94 8 13 27 17 -1904 000 MW4 08/02/94 8 13 2863 -2050 000 MW4 11/01/94 8 13 2898 -2085 000 -- -- __ -_ __ MW4 02/17/95 8 13 2641 -1828 000 6 4 <0 5 3 2 3 4 880 -- MW4 05/11195 813 23 84 -1571 0 00 91 <1 0 8 7 29 520 -- MW4 08/24/95 8 13 2522 -1709 0 00 28 20 35 7 2 870 -- MW4 10/19/95 8 13 2570 -1757 000 19 <5 0 18 6 0 1,000 <25 glprojects1739421tuaster\wp\g0UO3%3942gw xls Page 8 of48