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TABLE I GAUGING DATA AND ANALYTICAL RESULTS,FORMER EXXON RS 7-3942,STOCKTON, CALIFORNIA, 1987-1995 <br /> Casing Depth Groundwater LPH Concentration(Ng/L) <br /> Well Elevation to Water Elevation Thickness ^Ethyl- <br /> No Date (ft msl) (ft) (ft msl) (ft) Benzene Toluene benzene Xylenes TPH-g <br /> I W 1 01/30/91 780 3022 -2242 000 240 44 350 820 3,500 <br /> 05/02/91 30 11 -2231 000 150 25 230 520 2,500 <br /> 07116-17/91 3107 -2327 000 NS NS NS NS NS <br /> 10/15/91 3165 -2385 000 120 36 280 390 3,400 <br /> 01/28/92 2991 -2211 000 130 25 330 500 3,600 <br /> 04/30/92 2949 -2169 000 NS NS NS NS NS <br /> 08/13/92 3153 -2373 000 19 3 7 50 70 650 <br /> 10/08/92 32 13 -2433 000 NS NS NS NS NS <br /> 02/23/93 2878 -2098 000 NS NS NS NS NS <br /> 05/18/93 -- -- -- NS NS NS NS NS <br /> 08/22/93 2770 -1990 000 NS NS NS NS NS <br /> 12/30/93 2750 -1970 000 NS NS NS NS NS <br /> 02/17/94 27 17 -1937 000 NS NS NS NS NS <br /> 05/10/94 28 86 -1906 000 41 7 7 180 230 2,000 <br /> 08/02/94 2829 -2049 000 55 3 8 210 240 2,100 <br /> 11/01/94 2864 -20 84 000 36 <10 170 220 1,900 <br /> 02/17/95 26.03 -1823 000 73 <25 410 470 5,000 <br /> MW1 01/87 776 -- -- -- <1 <1 NA <1 <50 <br /> 07/16/87 1744 -968 132 <0 5 15 <0 5 <0 50 <100 <br /> 04/11/88 2051 -1275 000 <0 5 <0 5 <0 5 <0 5 <100 <br /> 09/13/88 2218 -1442 000 19 2 5 <0 5 <0 5 70 <br /> 11/16/88 2307 -1531 000 <0 5 9 5 <0 5 <0 5 130 <br /> 02/09/89 2264 -1488 000 17 0 2 02 06 <250 <br /> 05/31/89 2926 -2150 000 <0 5 <0 5 <0 5 0 8 <250 <br /> 08/17/89 25 87 -18 11 000 <0 5 <0 5 <05 <0 5 <250 <br /> 12/19/89 2922 -2146 000 <0 5 19 <0 5 <0 5 <250 <br /> XIS73942Q295 TI 0 Page I <br />