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.....� www �r � ■� � � � � � � � � � • i TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration( 2) Well Elevation to Water Elevation Thickness Ethyl- Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE IWI 08/19/98 690 1566 -8 76 000 12 <2 5 120 79 1,600 28 1W 1 08/19/98 690 <4 0* IWI 11/18/98 690 1602 -9 12 000 16 <5 0 78 40 1,300 26 IWI 03/30/99 690 -- IWI -IW1 05/05/99 690 1452 -7 62 000 156 IWI 08/20/99 6 90 1600 -910 000 -- -- IWI 12/06/99 690 1622 -932 0 00 <1 <1 19 8 5 420 19 IWI 02/29/00 690 13 73 -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 09/11/00 690 1615 -925 000 051 <0 5 096 <0 5 590 <0 5 IWI 12/13/00 690 1600 -9 10 000 <0 5 <0 5 <0 5 192 690 <0 5 IWI 03/08/01 690 15 13 -823 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 IWI 06/21/01 690 1651 -961 000 <0 5 <0 5 15 0 6 800 5 7 1W1 06/21/01 690 <5* IWI 09/20/01 690 1761 -1071 000 69 <25 <25 <25 <250 <25 IWI 12/04/01 6 87 1737 -1050 000 3 <0 5 13 <0 5 310 <5* IWI 03/05/02 6 87 16 53 -966 000 108 070 12 6 1 30 895 h 121 IWI 03/05/02 687 <5 0* IWI 06/11/02 687 1708 -1021 000 11 1 <0 5 107 13 704 h 8 5 IWI 06/11/02 6 87 <0 5* IW 1 09/10/02 6 87 1822 -1135 000 9 8 <0 5 8 5 1 1 738 h 101 IWI 09/10/02 687 <0 5* IWI 12/18/02 687 1794 -1107 000 115 0 8 81 12 747 h <0 5 MWI 01/87 776 -- -- -- <1 <1 -- <1 <50 MWI 07/16/87 776 -- -- -- <0 5 1 5 <0 5 <0 50 <100 MWI 04/11/88 776 2051 -1275 000 <0 5 <0 5 <0 5 <0 5 <100 MWI 09/13/88 776 22 18 -1442 0 00 19 2 5 <0 5 <0 5 70 MWI 11/16/88 776 2307 -1531 000 <05 95 <05 <05 130 - MWI 02/09/89 776 22 64 -14 88 000 17 0 2 0 2 0 6 <250 -- M W I 05/31/89 776 2926 -2150 000 <0 5 <0 5 <0 5 0 8 <250 -_ MWI 08/17/89 776 2587 -18 11 000 <0 5 <0 5 <0 5 <0 5 <250 -- g lprojects1739421mastcrlwplg120213942bw As Page 2 of 45