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s � <br /> TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration(I!glL) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (feet msl) (feet) (feet ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW4 04/18/96 8 13 2117 -13 04 000 10 <1 0 12 10 430 <5 0 <br /> 08/08/96 8 13 2241 -1428 000 4 4 <0 5 5 2 <0 50 450 7 4 <br /> 11/04/96 8 13 22 80 -1467 000 <0 5 <0 5 5 3 <0 5 730 15 <br /> 02/03/97 8 13 1832 -1019 000 9 3 <2 0 11 3 5 1,400 17 <br /> 05/08/97 7 18 1792 -1074 000 13 0 83 3 5 <0 5 780 10 <br /> 08/26/97 7 18 1971 -1253 000 7 6 <1 0 <1 0 <1 0 440 c 12 <br /> 11/11/97 7 18 2022 -1304 000 <2 0 <2 0 <2 0 <2 0 720 c <10 <br /> 03/03/98 7 18 1457 -739 000 8 9 0 80 058 <0 5 640 13 <br /> 03/03/98 7 18 6 0* <br /> 05/20/98 7 18 1455 -737 000 15 <5 0 35 9 1 1,100 <25 <br /> 05/20/98 7 18 65* <br /> 08/19/98 7 18 1606 -8 88 000 1 1 16 4 3 <0 5 680 <2 5 <br /> 08/19/98 7 18 7 7* <br /> 11/18/98 7 18 1640 -922 000 <0 5 14 5 4 <0 5 770 c 15 <br /> 03/30/99 718 -- -- _- -- -- -- -- -- -- <br /> 05/05/99 7 18 1490 -772 000 <0 5 <0 5 1 14 <0 5 542 7 2 <br /> 08/20/99 7 18 1645 -927 000 14 0 151 <0 5 1 68 460 203 <br /> 12/06/99 7 18 1655 -937 000 <1 <1 1 8 4 7 330 8 9 <br /> 02/29/00 7 18 1412 -694 000 4 3 <1 <1 <1 100 7 <br /> 05/16/00 7 18 14 14 -696 000 19 <1 <1 <1 190 6 9 <br /> 09/11/00 7 18 1649 -9 31 000 <0 5 <0 5 <0 S <0 5 330 7 2 <br /> 12/13/00 7 18 1635 -9 17 000 <0 5 5 8 082 5 1 360 13 <br /> 12/13/00 7 18 10* <br /> 03/08/01 7 18 1549 -831 000 <0 5 <0 5 <0 5 <0 5 280 24 <br /> 06121/01 7 18 1682 -964 000 <0.5 <0 5 <0.5 <0 5 200 30 <br /> 06/21/01 7 18 32* <br /> IproJccis173942Uriaste6wplg6Ol133942gw x]s Page 9 of 46 <br />