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TABLE I GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration(µg/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 /> V4 07116-17191 938 3306 -23 65 004 Not sampled-LPH <br /> 10/15/91 3374 -2434 003 Not sampled-LPH <br /> 01/28/92 31 92 -2254 Sheen 23,000 63,000 5,300 27,000 220,000 -- <br /> 04/30/92 3148 -2209 001 Not sampled-LPH <br /> 08/13/92 3360 -24 17 007 Not sampled-LPH <br /> 10/08/92 3420 -2473 0 12 Not sampled-LPH <br /> 02/23/93 3085 -2147 000 15,000 35,000 4,300 23,000 150,000 -- <br /> 05/18/93 2935 -1997 000 13,000 47,000 5,900 28,000 240,000 -- <br /> 08/22/93 2960 -2022 000 9,400 42,000 3,900 21,000 150,000 -- <br /> 12/30/93 2926 -1988 000 10,000 36,000 4,800 26,000 150,000 -- <br /> 02/17/94 2889 -1951 000 -- __ __ <br /> 05/10/94 2854 -19 16 002 Not sampled-LPH <br /> 08/02/94 2993 -2055 002 Not sampled-LPH <br /> 11/01/94 3034 -2096 000 <br /> 02/17/95 2782 -1844 000 <br /> 05/11/95 25 12 -15 74 Sheen <br /> 08124195 -- __ -- -- -- -- -- <br /> 10/19/95 2685 -1747 Sheen <br /> 02/13/96 2474 -1536 Sheen <br /> 04/18/96 2236 -1298 Sheen <br /> 08/08/96 2360 -1422 Sheen -- __ __ <br /> 11/04/96 2402 -1464 000 3,200 24,000 2,900 16,000 120,000 <1,250 <br /> 02/03/97 1940 -1002 Sheen -- __ __ <br /> 05/08/97 822 1926 -1104 Sheen <br /> 08/26/97 2080 -1247 015 <br /> 11/11/97 2134 -1312 Sheen <br /> 03/03/98 15 67 -744 001 <br /> 05/20/98 15 62 -735 007 <br /> 08/19/98 17 19 -887 0 13 <br /> 11/18/98 17 53 -924 009 <br /> 03/30/99 -- -- -- -- -- -- -- -- -- <br /> nprojectsV39A?lntaslejAwplg9OOU942bw xis Pa6e 34 o(37 <br />