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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 (µg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- - <br /> No Date (feet ms)) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> V 1 05/08/97 760 Well dry <br /> 08/26/97 760 Well dry <br /> 11/11/97 760 Well dry <br /> 03/03/98 760 Well dry <br /> 05/20/98 760 Well dry <br /> 08/19/98 7 60 Well dry -- -- -- __ -- <br /> 11/18/98 760 Well dry -- -- -- -- -- - <br /> 03/30/99 760 -- -- _- __ -- -_ -- -- -- <br /> 05/05/99 760 Well dry <br /> 08/20/99 760 Well dry <br /> 12/06/99 760 <br /> 02/29/00 7 60 -- -- -- -- -- -- -- -- <br /> 05/16/00 760 -- -- -- -- -- -- --09/11/00 760 -- -- -- -- -- -- -- -- <br /> 12/13/00 760 1705 -945 000 83 170 24 128 970 <0 5 <br /> 03/08/01 760 1622 -862 000 330 280 140 520 4,200 <2 5 <br /> 06/21/01 760 1761 -1001 0.00 1,500 830 560 1,690 13,000 <12 <br /> V2 05/02/91 930 3262 -2332 000 -- __ __ __ __ -- <br /> 07/16-17191 930 33 57 -2427 000 -- -- _- __ __ <br /> 10/15/91 930 3408 -2478 000 27,000 43,000 4,300 22,000 190,000 -- <br /> 01/28/92 930 3238 -2308 000 27,000 42,000 5,100 25,000 150,000 -- <br /> 04/30/92 930 3203 -2273 000 27,000 37,000 3,700 17,000 140,000 -- <br /> 08/13/92 930 3399 -2469 000 28,000 49,000 5,600 28,000 220,000 -- <br /> 10/08/92 930 3457 -2526 002 Not sampled - LPH <br /> 02/23/93 930 3137 -2207 000 -- -- -- -- <br /> 05118/93 930 -- -- -- -- -- -- -- -- -_ <br /> a 1prulcus1739421masterlwpVgM U942gw xls Page 38 of 46 <br />