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.� � � tom.■ �� w � � �� f� J� � � � � 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 08/19/98 763 <67* V3 11/18/98 763 17 11 -948 000 <25 680 1,800 7,000 20,000 <125 V3 03/30/99 763 1595 -832 0 00 <25 781 2,180 8,630 37,500 <100 V3 05/05/99 763 1595 -832 000 <10 389 1,040 4,500 14,400 774 V3 08/20/99 7 63 -- -- __ V3 12/06/99 763 V3 02/29/00 763 V3 05/16/00 763 -- -- __ _- V3 09/11/00 763 1760 -997 000 85 20 8 2 36 390 <0 5 V3 12/13/00 763 1745 -9 82 000 11 110 440 1,150 6,000 <2 5 V3 03/08/01 763 1670 -907 000 <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 7 63 <5* V3 09/20/01 7 63 1925 -1162 000 98 18 46 132 950 <0 5 V3 12/04/01 761 19 04 -1143 000 <50 260 960 4,200 19,000 <5* V3 03/05/02 7 61 1820 -1059 0 00 -- -- __ __ -_ -- V3 03/06/02 761 -- _ - -- 26 0 484 1,390 5,280 13,900 h 102 V3 03/06/02 761 <10* V3 06/11/02 761 1867 -1106 Sheen 720 117 548 2,000 8,300 h 10 0 V3 06/11/02 761 <2 5* V3 09/10/02 761 1998 -1237 000 <50 260 970 3,790 14,100 h 700 V3 09/10/02 761 <50* V3 12/18/02 761 1971 -12 10 000 <50 380 1,310 5,260 17,000 h <50 V3 03/24/03 7 61 1910 -1149 000 -- -- -- _- __ _- V3 03/25/03 7 61 -- -- -- 340 398 1,760 7,240 27,500 h 920 V3 03/25/03 7 61 <5* V3 06/11/03 7 61 1930 -1169 000 836 320 1,430 5,950 21,900 h 182 V3 06/11/03 7 61 <5* V3 09/17/03 761 2075 -13 14 0 00 75 0 485 2,160 8,640 31,000 h 950 V3 09/17/03 761 <5* V3 12/08/03 7 61 2072 -13 11 000 102 675 3,220 11,700 47,200 h 127 V3 12/08/03 761 <0 5* V3 03/02/04 7 61 1923 -11 62 000 240 765 3,600 12,100 48,600 h 95 0 I g 1prosects1739421masterlwplg060513942gw xls Page 54 of 59