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I TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration /L Well Elevation to Water Elevation Thickness Ethyl- Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE MW 10 06/28/04 725 <0 5* MW10 09/27/04 7 25 2136 -1411 000 — — -- — — — MW10 09/28/04 7 25 -- -- -- 118 17 0 7 6 2 1,190 h 119 MW10 09/28/04 7 25 <0 5* MW11 05/02/91 10 i5 3839 -2824 000 <0 3 <0 3 <0 3 <1 <50 -- MW 11 07/16-17/91 10 15 3938 -2923 000 <0 5 <0 5 <0 5 <0 5 <50 -- MW 11 10/15/91 1015 3994 -2979 000 <0 5 <0 5 <0 5 <0 5 <50 -- MW i l 01/28/92 1015 3808 -27 93 000 <0 5 <0 5 <0 5 <0 5 <50 -- MW 11 04/30/92 10 15 3772 -2757 000 <0 5 <0 5 <0 5 <0 5 <50 -- MW 11 08/13/92 1015 3994 -2979 000 <0 5 <0 5 <0 5 <0 5 <50 -- MW 11 10/08/92 10 15 4070 -3055 000 <0 5 <0 5 <0 5 <0 5 <50 -- MW I 1 02/23/93 1015 3728 -27 13 000 <0 5 <0 5 <0 5 <0 5 <50 -- MW 1 l 05/18/93 1015 -- -- -- -- -- -- -- -- -- MW 11 08/22/93 1015 3619 -26 04 000 -- -- -- -- -- -- MW 11 12/30/93 1015 Not accessible -- -- -- -- -- -- MW 11 11/11/97 l 0 t5 2483 -1468 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW11 11/11/97 1015 <20* MW 11 03/03/98 10 15 2011 -996 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW 1 l 03/03/98 1015 <2 0* MW 11 05/20/98 1015 1858 -843 000 <0 5f <0 5f <0 5f <0 5f <50f <2 5f MW1l 05/20/98 1015 <2 0* MW11 08/19/98 1015 1994 -979 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MWI 1 08/19/98 10 15 <2 0* MW l 1 11/18/98 10 15 2029 -10 U 0 00 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW 11 03/30/99 10 15 1826 -8 11 000 -- -- -- -- -- -- MW I 1 05/05/99 1015 1848 -8 33 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 MW11 08/20/99 1015 -- -- -- -- -- -- -- MW 11 12/06/99 1015 2037 -1022 000 -- -- -- -- -- -- MW 11 02/29/00 10 15 1829 -8 14 000 <1 <1 <1 <1 <50 <1 MW11 05/16/00 10 15 1849 -834 0 00 -- -- -- -- -- -- MW 11 09/11100 10 15 -- -- -- "" -- g\projects173942\masterlwp\gO9Q4O942gw xis Page 24 of 56