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�: <br /> TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Casing Depth Groundwater LPH __ Concentration_ (pg/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 /> MW 13 05/08/97 808 2087 -1279 000 <br /> 08/26/97 2269 -1461 000 -- __ __ <br /> 11/11/97 2320 -1512 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/03/98 1809 -1001 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/03/98 <2 0* <br /> 05/20/98 1698 -890 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 05/20/98 <2 0* <br /> 08/19/98 1838 -1030 000 <05 <05 <05 <05 <50 <25 <br /> 08/19/98 <2 0* <br /> 11/18/98 1882 -1074 000 -- -- -_ <br /> 03/30/99 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 19 10 -1102 000 -- __ __ <br /> 02/29/00 1682 -874 000 <1 <1 <1 <1 <50 <1 <br /> 05/16/00 16 18 -8 10 000 -- __ __ <br /> 09/11/00 1868 -1060 000 -- -- __ -- <br /> 12/13/00 18 59 -1051 000 <0 5 <0 5 <0 5 063 <50 <0 5 <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 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 -2214 000 110 26 270 330 2,000 -- <br /> 04/30/92 2956 -21 77 000 120 <10 540 600 4,700 -- <br /> 08/13/92 3157 -23 78 000 72 4 5 260 260 2,900 -- <br /> 10/08/92 32 17 -2438 000 18 2 8 52 45 1,100 -- <br /> t 1projeM1739421maste6wp\q]2009942gw xis Pabe 23 of 43 <br />