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0 0 0 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 PI 02/17/94 779 2675 -1896 000 57 29 250 190 2,300 -- P1 05/10/94 779 2641 -1862 000 120 60 450 370 4,800 -- P1 08/02/94 779 2787 -2008 000 100 16 310 200 3,200 -- P 1 11/01/94 779 2820 -2041 000 52 <0 5 1.60 120 1,700 -- 131 02/17/95 779 2552 -1773 000 80 58 300 180 4,000 -- P1 05/11/95 779 2295 -15 16 000 55 <5 0 160 110 2,400 -- P 1 08/24/95 779 2431 -1652 000 <5 0 80 350 230 2,900 -- P1 10/19/95 779 2478 -1699 000 84 97 250 180 2,700 <25 P 1 02/13/96 779 2252 -1473 000 84 <5 0 230 70 3,300 -- P1 04/18/96 779 2070 -1291 000 -- -- -- __ __ P1 08/08/96 779 2141 -1362 000 -- -- __ __ -- PI _P1 11/04/96 779 2205 -1426 000 67 <5 0 170 21 2,000 <25 P1 02/03/97 779 1750 -971 000 -- -- -- __ -- P1 _Pl 05/08/97 643 17 14 -1071 000 41 29 120 48 1,500 7 1 P1 08/26/97 643 1882 -1239 000 -- -- -- __ -- P1 11/11/97 643 1936 -1293 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 P1 03/03/98 643 1341 -698 000 20 1 1 91 28 940 13 P i 03/03/98 643 3 7* Pt 05/20/98 643 1375 -732 000 20 <5 0 110 19 1,600 <25 P l 05/20/98 643 3 1 Pi 08/19/98 643 1521 -878 000 16 25 17 1 3 250 30 P1 08/19/98 643 <2 0* P 1 11/18/98 643 1561 -9 18 000 -- -- __ __ -- P 1 _PI 03/30/99 643 -- -- __ P1 05/05/99 643 1437 -794 000 P1 08/20/99 643 -- -- P1 12/06/99 643 -- -- -- -- - -- -- P 1 02/29/00 643 -- -- __ -- -_ -- - - - P1 05/16/00 643 PI 09/11/00 643 P1 12/13/00 643 P 1 03/08/01 643 P1 06/21/01 643 P1 09/20/01 643 g Iprojecis173942VWa terlwp1g0302U942gw xis Page 22 of 39