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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE <br /> V3 03/02/04 761 <25* <br /> V3 06/28/04 761 2045 -1284 000 956 460 2,670 10,300 40,400 h 139 <br /> V3 06/28104 761 <0 5* <br /> V3 09/08/04 761 -- -- -- 163 373 1,980 6,530 28,400 h 115 <br /> V3 09/08/04 761 <2 5* <br /> V3 09/08/04 761 -- -- -- 228 531 1,980 8,170 39,000 h 142 <br /> V3 09/08/04 761 <2 5* <br /> V3 09/27/04 761 2153 -1392 000 -- -- -- -- __ -- <br /> V3 1 09/28/04 761 -- -- -- 190 430 2,380 9,020 35,400 h <0 5* <br /> V3 , 12/01/04 761 2105 -1344 000 230 485 2,990 11,100 45,000 h <0 5* <br /> V3 03/24/05 761 1911 -1150 000 -- -- -- __ __ -- <br /> V3 03/25/05 761 -- -- -- 174 268 1,530 4,860 24,500 h <0 5* <br /> V3 J 06/22/05 761 19.05 -1144 000 245 355 2,610 9,240 33,900 h <0.5* <br /> V4 05/02/91 938 3210 -2268 005 31,000 58,000 5,700 29,000 200,000 -- <br /> V4 07116-17191 938 3306 -2365 004 Not sampled-LPH <br /> V4 10/15/91 938 3374 -2434 003 Not sampled-LPH <br /> V4 01/28/92 938 3192 -2254 Sheen 23,000 63,000 5,300 27,000 220,000 -- <br /> V4 04/30/92 938 3148 -2209 001 Not sampled-LPH <br /> V4 08/13/92 938 3360 -2417 007 Not sampled-LPH <br /> V4 10/08/92 938 3420 -2473 012 Not sampled-LPH <br /> V4 02/23/93 9 38 3085 -2147 000 15,000 35,000 4,300 23,000 150,000 -- <br /> V4 05/18/93 938 2935 -1997 000 13,000 47,000 5,900 28,000 240,000 -- <br /> V4 08/22/93 938 2960 -2022 000 9,400 42,000 3,900 21,000 150,000 -- <br /> V4 12/30/93 938 2926 -1988 000 10,000 36,000 4,800 26,000 150,000 -- <br /> V4 02/17/94 938 2889 -1951 000 -- -- -- -- __ <br /> V4 05/10/94 938 2854 -1916 002 Not sampled-LPH <br /> V4 08/02/94 938 2993 -2055 002 Not sampled-LPH <br /> V4 11/01/94 931 3034 -2096 000 <br /> V4 02/17/95 938 2782 -1844 000 <br /> V4 05/11/95 938 25 12 -1574 Sheen <br /> V4 08/24/95 938 -- -- -- -_ -- -- -- _- <br /> V4 10/19/95 938 2685 -1747 Sheen <br /> g 4projects1739421masterlwp\gO60513942gw xfs Page 55 of 59 <br /> I <br />