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w.. � �. ..w aw w rs ,�■ w�■ ■w w w w w ■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 IWI 08/19/98 690 1566 -876 000 12 <2 5 120 79 1,600 28 IWI 08/19/98 690 <4 0* ffl 11/18/98 690 1602 -9 12 0 00 16 <5 0 78 40 1,300 26 IW 1 03/30/99 690 -- -- -- -- -- -- -- -- -- I1V 1 05/05/99 6 90 1452 -762 000 1 56 <1 0 148 725 2,170 106 Ml 1 08/20/99 690 1600 -9 10 000 -- -- -- _- -- IWI 12/06/99 690 1622 -932 000 <1 <1 19 8 5 420 19 1W 1 02/29/00 6 90 1373 -6 83 000 <1 <1 <1 <1 68 <1 IWI 05/16/00 690 13 82 -692 000 7 6 <1 16 <1 490 2 4 IWI 09/11/00 6 90 16 15 -925 000 051 <0 5 0 96 <0 5 590 <0 5 IW 1 12/13/00 690 1600 -910 000 <0 5 <0 5 <0 5 192 690 <0 5 I W 1 03/08/01 690 15 13 -823 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 ["11 06/21/01 690 1651 -961 000 <0 5 <0 5 1 5 0 6 800 5 7 [w] 06/21/01 690 <5* IWI 09/20/01 690 1761 -1071 000 6 9 <2 5 <2 5 <2 5 <250 <2 5 IWI 12/04/01 6 87 1737 -1050 000 3 <0 5 13 <0 5 310 <5* I W 1 03/05/02 687 1653 -966 000 108 070 12 6 130 895 h 121 I W l 03/05/02 6 87 <5 0* IWI 06/11/02 6 87 1708 -1021 000 11 1 <0 5 107 1 3 704 h 8 5 1 W 1 06/11/02 6 87 <0 5* I W I 09/10/02 6 87 1822 -1135 0 00 9 8 <0 5 8 5 1 1 738 h 101 IWI 09/10/02 687 <0 5* I W I 12/18/02 6 87 1794 -1107 0 00 11 5 0 8 8 1 1 2 747 h <0 5 1W1 03/24/03 6 87 1740 -1053 000 10 0 <0 5 7 8 <0 5 859 h 6 6 IWI 03/24/03 687 <0 5* I%V l 06/11/03 6 87 1757 -1070 000 18 2 0 8 9 0 1 3 1,140 h 12 2 Ml 06/11/03 6 87 <0 5* IWI 09/17/03 6 87 1892 -1205 000 207 0 5 7 3 17 1,340 h 107 IWI 09/17/03 6 87 <0 5* INV/ 12/08/03 6 87 1894 -1207 000 140 17 5 4 0 7 1,450 h 4 0 IN'V1 12/08/03 687 <0 5* 1,1pro]ects1739421masteAwplq 120313942gw xis Page 2 of 51