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�. ! <br /> TABLE 1 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 msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> I <br /> MW9 11/11/97 657 1947 -1290 000 31 <1 2 <1 2 <1 2 750 c 170 <br /> I <br /> 11/11/97 180* <br /> 03/03/98 1381 -724 000 22 <0 5 1 5 2 0 540 60 <br /> 03/03/98 <br /> I 6$* <br /> 05/20/98 13 86 -729 000 3 5 <0 5 <0 5 <0 5 220c 22 <br /> 05/20/98 20* <br /> 08/19/98 1550 -893 000 081 6 8 <0 5 <0 5 340 45 <br /> 08/19/98 <br /> 44* <br /> 11/18/98 1573 -916 000 <05 <05 <05 <05 310c 18 <br /> 03/30/99 13 85 -728 000 -- -- -- -- <br /> 05/05/99 1423 -766 000 <0 5 <0 5 <0 5 <0 5 93 1 5 12 <br /> 08/20/99 1569 -912 000 -- -- -- -- <br /> 12/06/99 15 83 -926 000 -- -- _- _- <br /> 02/29/00 13 33 -676 000 <1 <1 <1 <1 <50 48 <br /> 05/16/00 13 39 -682 000 -- -- -_ -_ <br /> 09/11/00 -- __ -_ <br /> 12/13/00 -- __ __ <br /> MW10 04/11/88 861 23 18 -1457 000 640 130 170 140 3,100 -- <br /> 09/13/88 25 85 -1724 000 4,800 130 340 240 7,700 -- <br /> 11/16/88 2608 -1747 000 5,800 290 700 340 9,400 -- <br /> 02/09/89 25 70 -1709 000 7,500 450 220 320 8,800 -- <br /> 05/31/89 2744 -18 83 000 11,000 320 1,600 800 24,000 -- <br /> 08/17/89 2945 -20 84 000 12,000 2,100 3,100 2,500 35,000 -- <br /> 03/21/90 Not accessible __ -_ __ -- <br /> 05/17/90 Not accessible -- -- __ _- __ <br /> 06/27/90 3252 -2391 000 9,700 4,800 2,400 5,300 51,000 -- <br /> F 1prgjectsW39421niastenwplq I200L3942gw xls Page 17 of 43 <br />