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m 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 P2 10/19/95 787 2498 -17 11 000 5 3 <2 0 65 34 1,100 <10 P2 02/13/96 787 22 76 -1489 000 6 3 <2 5 77 43 1,700 -- P2 04/18/96 787 2057 -1270 0 00 5 5 <2 5 74 39 1,600 <12 P2 08/08/96 7 87 2171 -1384 000 -- -- -- -- -- -- P2 11/04/96 7 87 2230 -14 43 000 <5 0 <5 0 51 16 1,500 <25 P2 02/03/97 7 87 1766 -979 000 <2 0 <2 0 52 17 1,500 13 P2 05/08/97 679 1724 -1045 000 18 <2 5 42 6 5 1,700 15 P2 08/26/97 679 1896 -1217 000 17 <2 0 25 2 6 1,500 11 P2 11/11/97 679 1950 -1271 000 25 <5 0 25 <5 0 1,300 <25 P2 03/03/98 679 1406 -727 000 17 <5 0 27 <5 0 1,400 <25 P2 03/03/98 679 <2 0* P2 05/20/98 679 1398 -719 000 8 2 <2 0 18 2 0 980 <10 P2 05/20/98 679 <2 0* P2 08/19/98 679 1523 -844 000 7 2 <2 5 8 6 <2 5 850 <12 P2 08/19/98 679 <2 0* P2 11/18/98 679 15 75 -896 000 20 <5 0 10 <5 0 1,100 <25 P2 03/30/99 679 14 07 -728 000 <0 5 <0 5 5 81 <0 5 950 <2 0 P2 05/05/99 679 1430 -7 51 000 <0 5 <0 5 836 <0 5 688 2 81 P2 08/20/99 679 1597 -9 18 000 959 197 3 89 130 489 252 P2 12/06/99 679 -- -- -- -_ __ _- P2 02/29/00 6 79 - -- -- -- -- -- -- P2 05/16/00 679 P2 09/11/00 679 P2 12/13/00 679 P2 03/08/01 679 _- P2 06/21/01 679 P2 09/20/01 679 P2 12/04/01 677 _- P2 03/05/02 677 P2 06/11/02 677 P2 09/10,02 6 77 -- -- -- -_ -- -- -- -- -- P2 12/18/02 677 g p oµw1739421mas1erlwplg030.1134426nv xls Pa6e 30 of 52