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r <br /> TABLE 2 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 /> Number Date feet (feet) feet feet Benzene Toluene benzene Xylenes TPH- MTBE <br /> RW4 09/17/03 7 86 2120 -1334 000 83 0 290 148 115 1,740 h 19 7 <br /> RW4 09/17/03 786 <0 5* <br /> RW4 12/08/03 786 21 14 -1328 000 122 366 162 134 2,340 h 9 4 <br /> RW4 12/08/03 7 86 <0 5* <br /> RW4 03/02/04 7 86 19 67 -1181 000 108 415 135 164 1,940 h 35 5 <br /> RW4 03/02/04 7 86 <0 5* <br /> RW4 06/28/04 786 2090 -1304 000 63 6 189 804 85 8 1,180 h 82 <br /> RW4 06/28/04 786 <0 5* <br /> RW4 09/27/04 786 2191 -1405 000 994 276 111 112 1,590 h 29 2 <br /> RW4 09/28/04 786 <0 5* <br /> RW4 12/01/04 7 86 2152 -13 66 000 941 292 112 134 1,470 h 322 <br /> RW4 12/01/04 7 86 <0 5* <br /> SWI 02/17/94 -- Not accessible since 02/17/94 <br /> SWI 02/17/95 -- 2801 Air spargmg well--samples not collected <br /> SWI 05/11/95 -- -- Air spargmg well--samples not collected <br /> SWI 08/24/95 -- -- Air spargmg well--samples not collected <br /> SWI 10/19/95 Air spargtng well--samples not collected <br /> SWI 02/13/96 -- -- Air spargmg well--samples not collected <br /> SWI 04/18/96 -- -- Air spargtng well--samples not collected <br /> SWI 08/08/96 -- Air spargmg well--samples not collected <br /> SWI 11/04/96 -- 2424 -- 000 2,400 3,100 290 2,800 25,000 <250 <br /> SWI 02/03/97 -" -- -- <br /> SWI <br /> -SW1 05/08/97 -- -- -' --SWI 08/26/97 -- -- -- -- <br /> SWI 11/11/97 '" -- - -- <br /> SWI 03/03/98 -- -- -- -- -- -- <br /> SW 1 05/20/98 -- -- -- -- -- -- -- -- <br /> SW 1 08/19/98 <br /> SWI 11/18/98 -- -- -- -- -- <br /> SWI 03/30/99 -- <br /> SW1 05/05/99 - -- -- --SWI 08/20/99 -- -- -- -- <br /> Page 40 of 56 <br /> g 1pro)eds1739421masterlwplq 120413942gw xis <br /> I <br />