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TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942, 4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Casing Depth Groundwater LPH _ Concentration(R�/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (feet msl) (feet) (feet ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> SW2 08/08/96 -- -- Air spargmg well -- samples not collected <br /> 11/04/96 2372 -- 000 110 <1 2 <1 2 20 320 <6 2 <br /> 03/08/01 <br /> -- <br /> VI 05/02/91 857 3174 -23 17 000 20,000 49,000 4,700 25,000 130,000 -- <br /> 07/16-17191 3270 -2413 000 14,000 44,000 3,000 15,000 170,000 -- <br /> 10/15/91 3325 -2468 000 18,000 51,000 4,200 23,000 200,000 -- <br /> 01/28/92 3151 -22 94 Sheen 20,000 58,000 2,400 23,000 150,000 -- <br /> 04/30/92 31 12 -2255 000 15,000 43,000 3,000 18,000 130,000 -- <br /> 08/13/92 33 17 -2460 000 12,000 44,000 3,600 20,000 180,000 -- <br /> 10/08/92 3376 -25 18 001 Not sampled - LPH <br /> 02/23/93 3047 -2190 000 9,800 19,000 3,700 18,000 100,000 -- <br /> 08/22/93 2970 -21 13 000 -- -- -- -- -- <br /> 12/30/93 2905 -2048 000 <br /> 02/17/94 2873 -2016 000 -- -- -- -- -- <br /> 05/10/94 28 33 -1976 000 8,200 37,000 3,600 17,000 110,000 -- <br /> 11/01/94 3005 -2148 000 -- -- -- -- -- <br /> 02/17/95 <br /> _02/17/95 2763 -1906 000 -- -- -- -- -- -- <br /> 05/11/95 24 87 -1630 000 -- -- -- -- -- -_ <br /> 10/19/95 Well dry -- -- -- -- -- <br /> 02/13/96 Well dry -- -- -- -- -- -- <br /> 04/18/96 Well dry -- -- -- -- -- -- <br /> 08/08/96 Well dry -- -- -- -- -- -- <br /> 11/04/96 Well dry -- -- -- -- -- -- <br /> 02/03/97 Well dry -- -- -- -- -- -- <br /> 05/08/97 760 Well dry -- -- -- -- -- -- <br /> 08126197 Well dry -- -- -- -- -- -- <br /> f 1pro3ects1739421masler wp1gM 13942gw els Page 33 of 4 t <br />