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TABLE 1 GAUGING DATA AND ANALYTICAL RESULTS, FORMER EXXON RS 7-3942, STOCKTON, CALIFORNIA, I987-1996 <br /> Casing Depth Groundwater LPH Concentration ( /L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No _ Date (ft ms]) (ft) _(ft ms1) (ft) _-_Benzene Toluene -benzene Xylenes _ -TPH-g MTBE <br /> IW 1 01/30/91 780 3022 -2242 000 240 44 350 820 3,500 -- <br /> 05/02/91 3011 -2231 000 150 25 230 520 2,500 -- <br /> 07/16-17191 3107 -2327 000 -- -- -- __ -- <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 -21 69 000 -- -- __ -- __ <br /> 08/13/92 31 53 -23 73 000 19 37 50 70 650 -- <br /> 10/08/92 32 13 -2433 000 -- -- -- __ -- <br /> 02/23/93 2878 -2098 000 <br /> 05/18/93 -- -- -- <br /> 08/22/93 2770 -1990 000 <br /> i <br /> 12/30/93 2750 -1970 000 <br /> 02/17/94 27 17 -1937 000 -- -- -- __ -- <br /> 05/10/94 2886 -1906 000 41 77 180 230 2,000 -- <br /> 08/02/94 2829 -2049 000 55 38 210 240 2,100 -- <br /> 11/01/94 2864 -2084 000 36 <1 0 170 220 1,900 -- <br /> 02/17/95 2603 -1823 000 73 <25 4I0 470 5,000 -- <br /> 05/11/95 2347 -1567 000 58 <10 350 400 4,700 -- <br /> 08/24/95 2481 -1701 000 67 54 430 420 4,100 -- <br /> 10/19/95 2535 -1755 000 29 <5 0 370 370 4,000 43 <br /> 02/13/96 23 11 -1531 000 58 <5 0 370 390 5,400 -- <br /> 04/18/96 2080 -1300 000 60 <5 0 470 450 6,100 38 <br /> 08/08/96 2202 -1422 000 -- _- __ -- <br /> 11/04/96 22.46 -14.66 0.00 50 <5.0 320 290 3,800 <25 <br /> MW I 01/87 776 -- -- -- <1 <1 -- <I <50 -- <br /> 07/16/87 1744 -968 132 <0 5 15 <0 5 <0 50 <100 -- <br /> XLS73942QI 16 T1 I <br /> Page 1 <br />