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TABLE 1 GAUGING DATA AND ANALYTICAL RESULTS, FORMER EXXON RS 7-3942, STOCKTON, CALIFORNIA, 1987-1993 <br /> Casing Depth Groundwater LPH Concentration (, /L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (ft ms1) (ft) (ft MSI).-- (ft) Benzene Toluene benzene Xylenes TPH- <br /> IW1 01/30/91 7 80 3022 -2242 000 240 44 350 820 3,500 <br /> 05/02/91 30 11 -2231 000 150 25 230 520 2,500 <br /> 07/16-17/91 31 07 -2327 000 NS NS NS NS NS <br /> 10/15/91 31 65 -23 85 000 120 36 280 390 3,400 <br /> 01/28/92 29 91 -22 11 000 130 25 330 500 3,600 <br /> 04/30/92 2949 -2169 000 NS NS NS NS NS <br /> 08/13/92 31 53 -23 73 000 19 3,7 50 70 650 <br /> 10/08/92 32 13 -2433 000 NS NS NS NS NS <br /> 02/2.3/93 28.78 -20.98 0.00 NS NS NS NS NS <br /> MW1 01/87 776 -- -- -- <1 < 1 NA < 1 <50 <br /> 07/16/87 1744 -9 68 1 32 <05 1 5 <0 5 <0 50 < 100 <br /> 04/11/88 2051 -1275 000 <05 <05 <05 <05 <100 <br /> 09/13/88 22 18 -1442 000 1 9 2 5 <05 <0 5 70 <br /> 11/16/88 2307 -1531 000 <05 95 <05 <05 130 <br /> 02/09/89 22.64 -1488 000 17 02 02 0.6 <250 <br /> 05/31/89 2926 -21 50 000 <0 5 <05 <0 5 0 8 <250 <br /> 08/17/89 25 87 -18 11 000 <05 <0 5 <0 5 <0 5 <250 <br /> 12/19/89 2922 -2146 000 <0 5 1 9 <0 5 <0 5 <250 <br /> 03/21/90 2746 -1970 000 <0 5 <0 5 0 8 29 80 <br /> 05/17/90 2824 -2048 000 <05 4 5 <05 <0 5 120 <br /> 09/25/90 29 59 -21 83 000 <05 7 0 10 47 170 <br /> 12/19/90 Dry NS NS NS NS NS <br /> 01/30/91 Dry NS Ns NS NS NS <br /> 05/02/91 Dry NS Ns NS NS NS <br /> 07116-17191 Dry NS Ns NS NS NS <br /> 10/15/91 2995 -22 19 a 000 NS NS NS NS NS <br /> XCLn3942(2)/Q293rr1 1 Page t <br />