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ME" now IM11111111 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 M1 BE P1 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 -- P 1 08/02/94 779 27 87 -2008 000 100 16 310 200 3,200 -- 131 11/01/94 779 2820 -2041 000 52 <0 5 160 120 1,700 -- Pl 02/17/95 779 25 52 -1773 000 80 5 8 300 180 4,000 -- P1 05/11/95 7 79 2295 -15 16 000 55 <5 0 160 110 2,400 P1 08/24/95 779 2431 -1652 000 <5 0 8 0 350 230 2,900 -- P1 10/19/95 779 2478 -1699 000 84 9 7 250 180 2,700 <25 PI 02/13/96 779 2252 -14 73 000 84 <5 0 230 70 3,300 -_ P1 04/18/96 779 2070 -1291 000 PI 08/08/96 779 2141 -1362 000 PI 11/04/96 779 22 05 -1426 000 67 <5 0 170 21 2,000 <25 PI 02/03/97 779 1750 -971 000 P1 05/08/97 643 17 14 -1071 000 41 2 9 120 48 1,500 7 1 131 08/26/97 643 18 82 -1239 000 131 11/11/97 643 1936 -1293 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 P1 03/03/98 6 43 1341 -698 0 00 20 1 1 91 28 940 13 PI 03/03/98 643 3 7* PI 05/20/98 643 1375 -732 000 20 <5 0 110 19 1,600 <25 111 05/20/98 6 43 3 1* P1 08/19198 643 1521 -878 000 1 6 2 5 17 1 3 250 3 0 131 08/19/98 643 <20* PI 11/18/98 643 1561 -9 18 000 PI 03/30/99 643 P) 05/05/99 643 1437 -794 000 PI 08/20/99 643 PI 12/06/99 643 P1 02/29/00 6 43 P1 05/16/00 643 PI 09/11100 643 -- -- -- -- -- -- - PI 12/13/00 643 PI 03/08/01 643 ,1pro3er ls1739421maslerlwplgD3O413942gw As Page 28 of 52