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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH _ Concentration(µg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW8 03/03/98 645 <100* <br /> MW8 05/20/98 645 1336 -691 000 71 200 2,000 4,600 31,000 <125 <br /> MW8 05/20/98 645 43* <br /> MW8 08/19/98 645 1491 -846 000 77 1,300 2,300 7,800 31,000 310 <br /> MW8 08/19/98 645 <100* <br /> MW8 11/18/98 645 15 15 -870 000 38 220 2,900 7,100 27,000 <125 <br /> MW8 03/30/99 645 1330 -6 85 000 <br /> MW8 05/05/99 645 1367 -722 000 18 8 78 9 1,580 3,000 19,100 46 1 <br /> MW8 08/20/99 645 15 15 -870 000 <br /> MW8 12/06/99 645 1525 -880 0 00 <br /> MW8 02/29/00 645 1276 -6 M 000 31 110 1,100 2,330 10,000 42 <br /> MW8 05/16/00 645 1297 -652 000 <br /> MW8 09/11/00 645 <br /> MW8 12/13/00 645 1520 -875 000 31 11 410 3675 4,200 37 <br /> MW8 12/13/00 645 22* <br /> MW8 03/08/01 645 1431 -786 000 15 44 880 1,545 13,000 19 <br /> MW8 06/21/01 645 1567 -922 000 13 61 240 580 5,700 17 <br /> MW8 06/21/01 645 22* <br /> MW8 09/20/01 645 1674 -1029 000 <br /> MW8 12/04/01 642 1648 -1006 000 <br /> MW8 03/05/02 642 1570 -928 000 <br /> MW8 03/06/02 642 -- -- -- 060 500 233 577 215 h <0 5 <br /> MW8 06/11/02 642 <br /> MW8 09/10/02 642 <br /> MW8 12/18/02 642 <br /> MW8 03/24/03 642 1653 -1011 000 <br /> MW8 03/25/03 642 -- -- -- 255 160 752 1,980 8,580 h 120 <br /> MW8 03/25/03 642 9 20* <br /> MW8 06/11/03 6 42 1669 -1027 000 466 188 962 1,990 10,400 h 23 0 <br /> MW8 06111/03 642 550* <br /> M W9 04/11/88 7 88 2081 -1293 000 <50 <50 <50 <50 2,100 -- <br /> glprojects1739421masterlwp1gO663\3942gw As Page 16 of 48 <br />