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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 /> SWI. 03/02/04 825 <5* <br /> SWI 06/28/04 825 2030 -1205 000 -- <br /> SWI t 06/29/04 825 -- -- -- 1,830 1,960 549 1,720 18,400 h <0 5* <br /> SWI 09/27/04 825 21 17 -1292 000 -- -- -_ -- <br /> SWI 1 09/28/04 825 -- -- -- 2,240 2,050 614 1,880 19,300 h <0 5* <br /> SWI 12/01/04 825 2082 -1257 000 — — __ _ — <br /> SWI 1 12/02/04 8 25 — — — 946 2,830 788 3,310 20,000 h <0 5* <br /> SW2 i 02/17/94 -- 2870 000 660 2,000 770 3,600 29,000 -- <br /> SW2 -- Not accessible since 02/17/94 <br /> SW2 02/17/95 -- 2757 Air sparging well--samples not collected <br /> SW2 05/11/95 -- 24 84 Air sparging well--samples not collected <br /> SW2 08/24/95 -- -- Air sparging well--samples not collected <br /> SW2 10/19/95 -- -- Air sparging well--samples not collected <br /> SW2 02/13/96 -- -- Air sparging well--samples not collected <br /> SW2 04/18/96 -- -- Air sparging well--samples not collected <br /> SW2 08/08/96 -- Air sparging well--samples not collected <br /> SW2 11/04/96 -- 2372 -- 000 110 <1 2 <1 2 2 0 320 <6 2 <br /> SW2 02/03/97 -- __ <br /> SW2 05/08/97 -- -- -- -- -- -- -- -- -- -- <br /> SW2 08/26/97 <br /> SW2 11/11/97 <br /> SW2 03/03/98 <br /> SW2 05/20/98 <br /> SW2 08/19/98 <br /> SW2 11/18/98 -- -- -- -- -- -- -- -- -- -- <br /> SW2 03/30/99 <br /> I <br /> SW2 05/05/94 -- -- -- -- -- -- -- -- -- <br /> SW2 08/20/94 -- -- -- -- -- -- -- -- -- <br /> SW2 12/06/99 <br /> SW2 02/29/00 <br /> SW2 05/16/00 -- -- -- -- -- -- -- -- <br /> g 1projects\73942\master\wp\q I204U942gw xls Page 43 of 58 <br />