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i • i ' <br /> 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 msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> V4 02/03/97 938 1940 -1002 Sheen <br /> 05/08/97 822 1926 -1104 Sheen <br /> 68/26/97 2080 -1247 0 15 <br /> 11/11/97 2134 -1312 Sheen <br /> 03/03/98 15 67 -744 001 <br /> 05/20/98 15 62 -735 007 <br /> 08/19/98 17 19 -887 0 13 -- -- -- -- -- __ <br /> 11/18/98 1753 -924 009 <br /> 05/05/99 15 95 -772 001 -- -- -- -- -- -- <br /> 08/20/99 1761 -939 000 637 5 14 14 5 5 37 190 12 6 <br /> 12/06/99 1785 -956 0 10 -- -- -- -- -- -- <br /> 02/29/00 15 25 -699 006 <br /> 05/16/00 1526 -701 004 -- -- -- -- __ <br /> 09/11/00 1759 -933 005 -- -- -- -- -_ <br /> 12/13/00 1745 -923 Sheen -- -- -- __ __ -- <br /> 03/08/01 1662 -840 000 680 361000 7,700 117,000 320,000 <250 <br /> UVB-MW1 02/28/97 742 1867 -- 000 7,200 18,000 2,000 11,000 99,000 1,100 <br /> 05/08/97 1976 -1134 000 5,900 15,000 1,800 9,000 86,000 1,600 <br /> 05/08/97 <200* <br /> 08/26/97 d 2050 -1308 000 700 18 19 42 2,400 77 <br /> 10/02/97 -- -- -- 1,200 1,400 240 2,400 17,000 300 <br /> 11/11/97 21 10 -1368 000 9,400 16,000 2,300 11,000 91,000 2,200 <br /> 11/11/97 <200* <br /> 03/03/98 15 55 -8 13 000 13,000 36,000 3,600 18,000 140,000 3,200 <br /> 03/03/98 <200* <br /> 05/20/98 15 23 -7 81 000 12,000 32,000 3,500 19,000 140,000 3,300 <br /> 1 Ipro3ecls1739421aiasterlwp%g30113942gw xls Page 38 of 41 <br />