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TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942, 4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration (µg/L) <br /> i <br /> Well Elevation to Water Elevation Thickness Ethyl- _ <br /> No Date (feet msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW2 02/13/96 877 23 84 -1507 000 49 <2 5 65 17 1,300 -- <br /> 04/18/96 20 98 -1221 000 -- -- -- -- -- -- <br /> 08/08/96 2275 -13 98 000 19 <0 5 41 11 490 68 <br /> 11/04/96 2277 -1400 000 25 <0 5 65 14 810 21 <br /> 02/03/97 1861 -984 000 -- -- -- -- -- -- <br /> 05/08/97 749 1825 -1076 000 12 <0 5 1 1 <0 5 73 <2 5 <br /> 08/26/97 2003 -1254 000 -- -- -- -- -- -- <br /> 11/11/97 2056 -1307 000 3 2 <0 5 3 4 071 160 5 2 <br /> 03/03/98 1490 -741 000 14 <0 5 12 <0 5 110 3 3 <br /> 03/03/98 <2 0* <br /> 05/20/98 1486 -737 000 15 <0 5 1 1 <0 5 110e 41 <br /> 05/20/98 <2 0* <br /> 08/19/98 1636 -887 000 <0 5 2 1 1 2 <0 5 110 <2 5 <br /> 08/19/98 <2 0* <br /> 11/18/98 1673 -924 000 -- -- -- -- -- -- <br /> 05/05/99 1520 -771 000 -- -- -- -- -- -- <br /> 08/20/99 1668 -9 19 000 101 456 808 242 253 68 1 <br /> 12/06/99 1688 -939 000 <1 <1 <1 <1 52 <1 <br /> 02/29/00 1442 -6 93 000 <1 <1 <1 <1 <50 <1 <br /> 05/16/00 1445 -696 000 <1 <1 <1 <1 <50 <1 <br /> 09/11/00 16 82 -933 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 <br /> 12/13/00 1667 -9 18 000 2 6 1 5 9 69 <0 5 <br /> 03/48/01 1581 -8.32 000 <0.5 <0 5 <0 5 <0 5 <50 <0,5 <br /> MW3 01/87 914 -- -- -- 17 640 -- 400 32,000 -- <br /> 07/16/87 1926 -10 12 000 830 600 190 436 1,700 -- <br /> 04/11/88 2243 -1329 000 450 970 210 860 4,600 -- <br /> f 1pro]eets1739a21niaslerhtipkg3O]U9a2gw xis Page 5 of 4l <br />