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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration L <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW4 12/18/02 7 12 1828 -11 16 000 1 8 <0 5 <0 5 <0 5 301 h 826 <br /> MW4 12/18/02 712 92 0* <br /> MW4 03/24/03 7 12 1780 <br /> -1068 000 <0 5 <0 5 <0 5 <0 5 402 h 723 <br /> MW4 03/24/03 7 12 72 5* <br /> MW4 06/11/03 7 12 1793 -1081 000 230 0 6 <0 5 <0 5 372 h 686 <br /> MW4 06/11/03 7 12 62 6* <br /> MW4 09/17/03 7 12 1927 -12 15 000 330 <0 5 <0 5 <0 5 547 h 108 <br /> MW4 09/17/03 712 114* <br /> MW4 12/08/03 7 12 1928 -1216 0 00 170 <0 5 <0 5 <0 5 444 h 126 <br /> MW4 12/08/03 712 130* <br /> MW4 03/02/04 7 12 1778 -1066 000 220 <0 5 <0 5 <0 5 354 h 100 <br /> MW4 03/02/04 7 12 84 2* <br /> MW4 06/28/04 712 1896 -1184 000 -- - -- - - _ <br /> MW4 06/29/04 712 -- -- — <br /> 120 <0 5 <0 5 <0 5 380 h 99 2* <br /> MW5 07/16/87 958 1669 -711 000 <10 480 280 1,390 2,200 -- <br /> MW5 04/11/88 958 2286 -1328 000 <2 0 25 25 85 500 -- <br /> MWS 09/13/88 958 25 33 -1575 000 4 4 650 50 110 1,400 -- <br /> MW5 11/16/88 958 25 31 -1573 000 <1 3 19 25 24 910 -- <br /> MW5 02/09/89 958 25 09 -1551 000 3 4 12 15 22 1,250 -- <br /> MW5 05/31/89 958 2672 -1714 000 <0 5 14 24 46 790 -- <br /> MW5 08/17/89 958 28 44 -1886 000 10 29 13 l2 1,200 -- <br /> MW5 12/19/89 958 2945 -1987 000 -- -- -- -- _- <br /> MW5 958 Well dry since 03/21/90 <br /> MW5 12/30/93 958 2990 -2032 000 <br /> MW5 02/17/94 958 2954 -1996 000 <br /> MW5 05/10/94 9 58 29 13 -1955 000 -- -- -- -- -- __ <br /> MW5 08/02/94 9 58 Well dry <br /> MW5 11/01/94 958 Well dry <br /> MW5 02/17/95 958 2841 -1883 000 -- -- -- -- -- <br /> MW5 05/11/95 958 25 72 -1614 000 14 12 75 4 8 350 -- <br /> MW5 08/24/95 958 2335 -1377 000 <0 5 <0 5 072 1 5 85 -- <br /> g Iprojecu1739421mastcrlwp1g67D413942gw xls Page 1 i of 54 <br />