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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(4g/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (feet MSI) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW 13 03/30/99 808 1688 -880 000 __ -- <br /> 05/05/99 1709 -901 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> 08/20/99 1872 -1064 000 -- __ <br /> 12/06/99 1910 -1102 000 -- -- <br /> 02/29/00 1682 -874 000 <1 <1 <1 <1 <50 <1 <br /> 05/16/00 16 18 -8 10 000 -- -_ __ <br /> 09/11/00 1868 -1060 000 <br /> P1 01/30/91 779 3024 -2245 000 -- _- <br /> 05/02/91 30 13 -2234 000 340 5 430 520 3,700 -- <br /> 07/16-17/91 31 09 -23 30 000 160 <2 5 160 240 3,000 -- <br /> 10/15/91 3168 -23 89 000 69 3 4 63 73 1,300 -- <br /> 01/28/92 2993 -22 14 000 110 26 270 330 2,000 -- <br /> 04/30/92 2956 -2177 000 120 <10 540 600 4,700 -- <br /> 08/13/92 31 57 -2378 000 72 4 5 260 260 2,900 -- <br /> 10/08/92 32 17 -2438 000 18 2 8 52 45 1,100 -- <br /> 02/23/93 28 82 -2103 000 66 18 200 200 2,300 -- <br /> 05/18/93 2746 -1967 000 43 18 290 220 3,200 -- <br /> 08122193 27 72 -1993 000 44 69 160 130 1,900 -- <br /> 12/30/93 2707 -1928 000 210 52 840 770 7,800 -- <br /> 02/17/94 2675 -1896 000 57 29 250 190 2,300 -- <br /> 05/10/94 2641 -1862 000 120 60 450 370 4,800 -- <br /> 08/02/94 2787 -2008 000 100 16 310 200 3,200 -- <br /> 11/01/94 2820 -2041 000 52 <0 5 160 120 1,700 -- <br /> 02/17/95 25 52 -1773 000 80 5 8 300 180 4,000 -- <br /> 05/11/95 2295 -15 16 000 55 <5 0 160 110 2,400 -- <br /> 08/24/95 2431 -1652 000 <5 0 8 0 350 230 2,900 -- <br /> 10/19/95 2478 -1699 000 84 97 250 180 2,700 <25 <br /> 02/13/96 2252 -1473 000 84 <5 0 230 70 3,300 -- <br /> 04/18/96 2070 -1291 000 -- _- -- <br /> 08/08/96 2141 -1362 000 <br /> f'projec[SV39424nasteA;vp'49000942bty xls Pabe 20 of 37 <br />