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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 X lenes TPH-g MTBE MW I I 05/02/91 1015 3839 -2824 000 <0 3 <0 3 <0 3 <1 <50 -- MW11 07116-17191 10 15 3938 -2923 000 <0 5 <0 5 <0 5 <0 5 <50 -- MW 11 10/15/91 10 15 3994 -2979 000 <0 5 <0 5 <0 5 <0 5 <50 -- MW 11 01/28/92 10 15 3808 -2793 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 11 05/18/93 10 15 -- -- -- - _ MW 1 l 08/22193 10 15 36 19 -2604 000 -- -- '- -- '- -- MW 1 l 12/30/93 1015 Not accessible -- -- -- MW 11 11/11/97 10 15 2483 -1468 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <2 0* MW 11 11/11/97 10 15 <2 5 MW i 1 03/03/98 1015 2011 -996 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0* MW 11 03/03/98 10 15 <2 5f MW11 05/20/98 10 15 1858 -843 000 <0 5f <0 5f <0 5f <0 5f <50f MW l 1 05/20/98 10 15 <2<2 5 MW 11 08/19/98 1015 1994 -979 000 <0 5 <0 5 <0 5 <0 5 <50 5 <2 0* MW1I 08/19/98 1015 <2 5 MW11 11/18198 1015 2028 -10 13 000 <0 5 <0 5 <0 5 <0 5 <50 MW 11 03/30/99 10 15 1826 -811 000 - -- - -- <2 4 MW 11 05/05/99 1015 1848 -8 33 000 <0 5 <0 5 <0 5 <0 5 < -- MWI1 08/20/99 1015 -- -- -- -- MW i 1 12/06/99 1015 2037 -1022 0 00 -- -- -- <1 MW 11 02/29/00 1015 1829 -8 14 000 MW 11 05/16/00 10 15 1849 -834 000 -- -- -- -- -- MWLI 09/11/00 1015 -- -- -- -- MW11 12/13/00 1015 MW I 1 03/08/01 1015 MW11 06/21/01 10 15 -- -- -- <0 5 MW 11 09/20/01 1015 2203 -1188 000 4 8 18 2 3 15 5 58 <0 5 MW 11 11/08/01 10 15 <0 5 <0 5 <0 5 <0-5 <50 MW 11 12104/01 5 84 -- -- -- -- Page 24 of 56 g lprojects1739421masterlwply120413942gw x1s