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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 ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MWI 08/17/89 776 25 87 -18 11 000 <0 5 <0 5 <0 5 <0 5 <250 -- <br /> 12/19/89 776 2922 -2146 000 <0 5 1 9 <0 5 <0 5 <250 <br /> 03/21/90 776 2746 -1970 000 <0 5 <0 5 08 2 9 80 -- <br /> 05/17/90 776 28 24 -2048 000 <0 5 4 5 <0 5 <0 5 120 -- <br /> 09/25/90 776 2959 -2183 000 <0 5 7 0 1 0 4 7 170 -- <br /> 12/19/90 776 Dry -- __ __ __ <br /> 01/30/91 776 Dry <br /> 05/02/91 776 Dry <br /> 07/16-17/91 776 Dry <br /> 10/15/91 776 2995 -22 19 a 000 <br /> 01/28/92 776 2970 -2194 a 000 <br /> 04/30/92 776 2926 -2150 000 <br /> 08/13/92 776 29 85 -2209 000 <br /> 10/08/92 776 Dry _- <br /> 02/23/93 776 2855 -2079 000 -- -- __ <br /> 05/18/93 776 27 12 -1936 000 19 <0 5 28 1 8 950 -- <br /> 08/22/93 776 2734 -1958 000 8 9 <0 5 <0 5 <0 5 710 -- <br /> 12/30/93 776 2678 -1902 000 12 <0 5 19 7 7 390 -- <br /> 02/17/94 776 2647 -1871 000 <0 5 13 <0 5 <0 5 130 -- <br /> 05/10/94 776 2612 -1836 000 <0 5 1 3 0 6 0 6 510 -- <br /> 08/02/94 776 27S9 -1983 000 <0 5 3 5 17 5 2 780 -- <br /> 11/01/94 776 2794 -20 18 000 <0 5 <0 5 10 2 0 400 -- <br /> 02/17/95 776 25 35 -1759 000 <0 5 0 98 1 1 1 1 480 -- <br /> 05/11/95 776 22 72 -1496 000 <0 5 <0 5 <0 5 <0 5 130 -- <br /> 08124195 776 2403 -1627 000 <0 5 <0 5 <0 5 <0 5 140 -- <br /> 10/19/95 776 2461 -1685 000 <05 <05 <05 <05 210 <25 <br /> 02/13/96 776 2243 -1467 000 <0 5 <0 5 <0 5 <0 5 190 -- <br /> o projects\739421masterlxp\g6Ol%3942gw As Na6c 3 of 46 <br />