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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHWG AVENUE,STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH _ Concentration(pg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> RW4 09/10/02 786 2038 -1252 000 599 186 1,240 802 14,800 h 134 <br /> RW4 09/10/02 786 <5* <br /> RW4 12/18/02 786 2014 -1228 000 115 450 195 189 1,750 h 200 <br /> RW4 12/18/02 7 86 <5* <br /> SWI 02/17/94 -- Not accessible since 02/17/94 <br /> SWI 02/17/95 -- 2801 Air sparging well--samples not collected <br /> SWI 05/11/95 -- -- Air spargmg well--samples not collected <br /> SW 1 08/24/95 -- _ -- Alt spargmg well--samples not collected <br /> SWI 10/19/95 -- -- Air spargmg well--samples not collected <br /> SWI 02/13/96 -- -- Air spargmg well--samples not collected <br /> SWI 04/18/96 -- -- Air spargmg well--samples not collected <br /> SWI 08/08/96 -- Air spargmg well--samples not collected <br /> SWI 11/04/96 -- 2424 0 00 2,400 3,100 290 2,800 25,000 <250 <br /> SWI 02/03/97 -- -- <br /> SWI 05/08/97 <br /> SW1 08/26/97 <br /> SWI 11/11/97 -- -- -- -- -- -- -- -- <br /> SWI 03/03/98 <br /> SWI 05/20/98 <br /> SWI 08/19/98 -- -- -- -- _- -- -_SWI 11/18/98 <br /> SWI 03/30/99 - -- -- -- -- -- -- _- -- <br /> SWI 05/05/99 <br /> SWI 08/20/99 <br /> SWI 12/06/99 <br /> SWI 02/29/00 <br /> SWI 05/16/00 <br /> SWI 09/11/00 <br /> S W i 12/13/00 <br /> SWI 03/08/01 <br /> SWI 06/21/01 <br /> g%prglectsg39421master%wplq 1202\39426w xls Page 34 of 45 <br />