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■wi �*� I � � � � I W ! � � � m7 <br /> TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 N PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration(µg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (ft rnsl) (ft) (ft ms]) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> V3 08/19/98 7 63 <67* <br /> 11/18/98 17 11 -948 000 <25 680 1,800 7,000 20,000 <125 <br /> 03/30/99 1595 -832 000 <25 781 2,180 8,630 37,500 <100 <br /> 05/05/99 1595 -832 000 <10 389 1,040 4,500 14,400 774 <br /> 08/20/99 -- -- -- <br /> 12/06/99 -- -- -- <br /> 02/29/00 -- -- -- -- <br /> 05/16/00 -- -- -- -- -- <br /> V4 05/02/91 938 32 10 -22 68 005 31,000 58,000 5,700 29,000 200,000 <br /> 07/16-17/91 3306 -23 65 004 Not sampled-LPH <br /> 10/15/91 3374 -2434 0 03 Not sampled-LPH <br /> 01/28/92 3192 -2254 Sheen 23,000 63,000 5,300 27,000 220,000 -- <br /> 04/30/92 3148 -22 09 001 Not sampled-LPH <br /> 08/13/92 3360 -24 17 007 Not sampled-LPH <br /> 10/08/92 3420 -24 73 0 12 Not sampled-LPH <br /> 02/23/93 3085 -2147 000 15,000 35,000 4,300 23,000 150,000 -- <br /> 05/18/93 29 35 -1997 000 13,000 47,000 5,900 28,000 240,000 -- <br /> 08/22/93 2960 -2022 000 9,400 42,000 3,900 21,000 150,000 -- <br /> 12/30/93 2926 -1988 000 10,000 36,000 4,800 26,000 t50,000 - <br /> 02/17/94 28 89 -19 51 000 -- -- -- -- -- <br /> 05/10/94 2854 -19 16 0 02 Not sampled- LP11 <br /> 08/02/94 2993 -2055 0 02 Not sampled- LPH <br /> 11/01/94 3034 -2096 000 -- -- -- -- -- -- <br /> 02/17/95 2782 -1844 000 -- - -- -- - <br /> 05/11/95 25 12 -1574 Sheen <br /> 08/24/95 -- -- -- -- <br /> 10/19/95 2685 -1747 Sheen -- -- -- -- - -- <br /> 02/13/96 2474 -1536 Sheen -- -- -- -- - <br /> 04/18/96 2236 -1298 Sheen -- -- -- -- - -- <br /> f Iprglects1739421masterlwp\Q5000942gw xls Page 34 of 37 <br />