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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 ( /L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (feet msl) (feet) (feet msi) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> SWI 02/17/94 -- Not accessible since 02/17/94 <br /> 02/17/95 2801 Air sparging well -- samples not collected <br /> 05/11/95 -- -- Air sparging well -- samples not collected <br /> 08/24/95 -- Air sparging well -- samples not collected <br /> 10/19/95 -- -- Air sparging well -- samples not collected <br /> 02/13/96 -- -- Air sparging well -- samples not collected <br /> 04/18/96 -- -- Air sparging well -- samples not collected <br /> 08/08/96 Air sparging well -- samples not collected <br /> 11/04/96 -- 2424 -- 000 2,400 3,100 290 2,800 25,000 <250 <br /> 02/03/97 -- -- <br /> 05/08/97 -- -- -- -- -- -- -- -- -- -- <br /> 08/26/97 -- -- -- <br /> 11/11/97 -- -- -- __ <br /> 03/03/98 -- -- -- -- -- -- -_ -- -- <br /> 05/20/98 -- -- -- <br /> 08/19/98 -- -- -- -- -- -- -- -- -- -- <br /> 11/18/98 -- -- -- - <br /> 03/30/99 -- -- -- -- -- -- -- -- -- <br /> 05/05/99 -- -- -- <br /> 08/20/99 -- -- -- __ <br /> 12/06/99 -- -- -- -- -- -- -- -- <br /> 02/29/00 -- <br /> 05/16/00 <br /> 09/11/00 -- -- -- -- -- -- -- -- -- <br /> 12/13/00 -- -- - <br /> 03/08/01 <br /> 06/21/01 -- -- -- -- -- -_ -- -- -_ <br /> o'prujecls1739421masicrhvp\g6OiU942gw xJs Page h of 46 <br />