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w ■w■ w w w w w w w w ww� Iw■ � i• � � >• • 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 V3 08/20/99 763 V3 12/06/99 763 V3 02/29/00 7 63 -- V3 05/16/00 763 -- -- V3 _V3 09/11/00 763 1760 -997 000 85 20 82 36 390 <0 5 V3 12/13/00 763 1745 -982 000 11 110 440 1,150 6,000 <2 5 V3 03/08/01 763 1670 -9 07 000 <25 640 2,100 8,900 40,000 <25 V3 06/21/01 763 1807 -1044 000 <0 5 3 1 20 346 1,500 30 V3 06/21/01 763 <5* V3 09/20/01 763 1925 -1162 000 9 8 18 46 132 950 <0 5 V3 12/04/01 7 61 1904 -1143 000 <50 260 960 4,200 19,000 <5* V3 03/05/02 761 1820 -1059 000 -- V3 03/06/02 761 -- -- -- 260 484 1,390 5,280 13,900 h 102 V3 03/06/02 7 61 <10* V3 06/11/02 7 61 1867 -1106 Sheen 720 117 548 2,000 8,300 h 100 V3 06/11/02 7 61 <2 5* V3 09/10/02 7 61 1998 -1237 000 <50 260 970 3,790 14,100 h 700 V3 09/10/02 7 61 <50* V3 12/18/02 761 1971 -12 10 000 <50 380 1,310 5,260 17,000 b <50 V3 03/24/03 761 1910 -1149 000 V3 03/25/03 761 - - V3 03/25/03 7 61 - - -- -- 340 398 11760 7,240 27,500 h 920 <5* V4 05/02/91 938 32 10 -2268 005 31,000 58,000 5,700 29,000 200,000 V4 07116-17/91 938 33 06 -2365 004 Not sampled-LPH V4 10/15/91 938 3374 -2434 003 Not sampled- LPH V4 01/28/92 938 3192 -2254 Sheen 23,000 63,000 5,300 27,000 220,000 V4 04/30/92 938 31 48 -2209 001 Not sampled-LPH V4 08/13/92 938 3360 -24 17 007 Not sampled- LPH V4 10/08/92 938 3420 -2473 012 Not sampled- LPH V4 02/23/93 9 38 3085 -2147 000 15,000 35,000 4,300 23,000 150,000 V4 05/18/93 938 2935 -1997 000 13,000 47,000 5,900 28,000 240,000 -- g 1projeclsV39421ivaslerl"p\gO303L39426w xis Page 42 of 47