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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( /L) <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 /> M W 13 08/20/99 808 1872 -1064 000 <br /> 12/06/99 19 10 -1102 000 -- -- -- -- -- _- <br /> 02/29/00 1682 -874 000 <1 <1 <1 <1 <50 <1 <br /> 05/16/00 16 18 -8 10 0 00 -- -- __ -_ _- -- <br /> 09/11/00 1868 -10 60 000 -- -- -- -- __ -- <br /> 12/13/00 1859 -1051 000 <0 5 <0 5 <0 5 0 63 <50 <0 5 <br /> 03/08/01 1788 -9 80 000 <0 5 <0 5 <0 5 <0 5 <50 <0.5 <br /> PI 01/30/91 779 30 24 -2245 000 -- -- -- -- -- -- <br /> 05/02/91 30 13 -2234 000 340 5 430 520 3,700 -- <br /> 07/16-17/91 3109 -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 3157 -2378 000 72 45 260 260 2,900 -- <br /> 10/08/92 32 17 -2438 000 18 28 52 45 1,100 -- <br /> 02/23/93 2882 -2103 000 66 1 8 200 200 2,300 -- <br /> 05/18/93 2746 -1967 000 43 18 290 220 3,200 -- <br /> 08/22/93 2772 -19 93 000 44 6 9 160 130 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 -18 62 000 120 60 450 370 4,800 -- <br /> 08/02/94 2797 -2008 000 100 16 310 200 3,200 -- <br /> 11/01/94 28 20 -2041 000 52 <0 5 160 120 1,700 -- <br /> 02/17/95 2552 -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 24 31 -1652 000 <5 0 8 0 350 230 2,900 -- <br /> t 1proje". %739421ntaster1%tip1g30113942gw xts Page 23 or 41 <br />