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i TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH _ Concentration(µg/L) Well Elevation to Water Elevation Thickness Ethyl- Number _ Date (feet) (feet) (feet) (feet) Benzene Toluene benzene _ Xylenes TPH-g MTBE UVB-MW2 03/02/04 774 19 04 -1130 000 754 28 2 7 6 0 2,640 h 270 UVB-MW2 03/02/04 7 74 <0 5* VI 05/02/91 857 3174 -2317 000 20,000 49,000 4,700 25,000 130,000 -- VI 07116-17/91 857 3270 -2413 000 14,000 44,000 3,000 15,000 170,000 -- Vl 10/15/91 857 3325 -2468 000 18,000 51,000 4,200 23,000 200,000 -- VI 01/28/92 8 57 3151 -2294 Sheen 20,000 58,000 2,400 23,000 150,000 VI 04/30/92 8 57 31 12 -2255 000 15,000 43,000 3,000 18,000 130,000 VI 08/13/92 857 33 17 -2460 000 12,000 44,000 3,600 20,000 180,000 VI 10/08/92 857 3376 -25 18 001 Not sampled-LPH VI 02/23/93 8 57 3047 -21 90 000 9,800 19,000 3,700 18,000 100,000 - VI 05/18/93 8 57 -- -- -- -- V 1 08/22/93 8 57 2970 -21 13 000 VI 12/30/93 8 57 2905 -2048 000 VI 02/17/94 857 2873 -20 16 000 -- -- -- -- -- Vi _Vl 05/10/94 857 2833 -1976 000 8,200 37,000 3,600 17,000 110,000 VI 08/02/94 857 -- -- -- -- __ -- VI -VI 11/01/94 857 3005 -2148 000 VI 02/17/95 857 2763 -1906 000 VI 05/11/95 857 24 87 -1630 000 VI 08/24/95 8 57 -- -- -- -- -- -- -- -- -- V1 10/19/95 857 Well dry VI 02/13/96 857 Well dry VI 04/18/96 857 Well dry VI 08/08/96 857 Well dry VI 11/04/96 8 57 Well dry VI 02/03/97 857 Well dry VI 05/08/97 760 Well dry VI 08/26/97 760 Well dry VI 11111/97 760 Well dry VI 03/03/98 760 Well dry V1 05/20/98 760 Well dry 6 kPro3ectsV739421masterlwp1g03Q4"942bw xls Pabe 44 of 52