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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(pg/L) <br /> Well Elevation to Water Elevation Thickness - Ethyl_ ._ <br /> No Datemsl eet f ) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> ( ) (feet) (feet msl <br /> I <br /> V4 11/01/94 938 3034 -2096 000 -- <br /> 02/17/95 938 2782 -1844 000 <br /> 05/11/95 938 25 12 -15 74 Sheen <br /> 08/24/95 938 -- -- __ <br /> 10/19/95 938 2685 -1747 Sheen <br /> 02/13/96 938 2474 -1536 Sheen <br /> 04/18/96 938 2236 -1298 Sheen <br /> 08/08/96 938 2360 -1422 Sheen <br /> 11/04/96 938 2402 -14 64 000 3,200 24,000 2,900 16,000 120,000 <1,250 <br /> 02/03/97 938 1940 -1002 Sheen <br /> 05/08/97 822 1926 -1104 Sheen <br /> 08/26/97 822 2080 -1247 0 15 <br /> 11/11/97 822 2134 -13 12 Sheen <br /> 03/03/98 822 1567 -744 0 O1 <br /> 05/20/98 822 1562 -735 007 <br /> 08/19/98 822 17 19 -887 0 13 <br /> 11/18/98 822 1753 -924 009 <br /> 03/30/99 822 <br /> 05/05/99 822 1595 -772 001 <br /> 08/20/99 822 1761 -939 000 63 7 5 14 145 537 190 126 <br /> 12/06/99 822 1785 -956 0 10 <br /> 02/29/00 822 1525 -699 006 <br /> 05/16/00 822 1526 -701 004 <br /> 09/11/00 822 1759 -933 005 <br /> 12/13/00 822 1745 -923 Sheen <br /> 03/08/01 822 1662 -840 000 680 36,000 7,700 117,000 320,000 <250 <br /> 06/21/01 822 1797 -9 74 002 -- -- -- -- -- <br /> UVB-MWI 02/28/97 742 1867 -- 000 7,200 18,000 2,000 11,000 99,000 1,100 <br /> 05/08/97 742 1876 -1134 000 5,900 15,000 1,800 9,000 86,000 1,600 <br /> 05/08/97 742 <200* <br /> 08/26/97 d 742 2050 -1308 000 700 18 19 42 2,400 77 <br /> 10/02/97 742 -- -- -- 1,200 1,400 240 2,400 17,000 300 <br /> 1projects173932lmastcrlwp\g6Ol%3942gw xts Page 35 of 37 <br />