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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 Well Elevation to Water Elevation Thickness Ethyl- Number Date (feet) feet feet (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <2 0* MW3 03/03/98 114 <0 5 170 <2 5 MW3 05/20/98 854 1602 -7 48 0 00 14 <0 5 <0 5 <2 0* MW3 05/20/98 854 MW3 08/19/98 8 54 17 48 -8 94 0 00 S 9 2 2 <0 5 0 63 280 <2 0* MW3 08/19/98 8 54 <2 5 MW3 11/18/98 8 54 17 93 -9 39 0 00 <0 5 <0 5 <0 5 <0 5 <50 -- MW3 03/30/99 854 -- "" <0 5 <0 5 <0 5 <50 <2 0 MW3 05/05/99 854 1640 -786 000 <0 5 - MW3 08/20/99 854 17 85 -931 000 -- -- -- -- MW3 12/06/99 854 1802 -9 48 000 -- -- -_ MW3 02/29/00 854 1567 -7 13 000 -- -- -- -" -- - MW3 05/16/00 854 1562 -708 000 -- -- - <D 5 MW3 09/11/00 854 1798 -9 44 000 7 3 84 5 9 115 220 <0 5 MW3 12/13/00 854 17 60 -906 000 3 4 11 1 8 8 3 90 <0 5 MW3 03/08/01 854 1706 -852 000 <0 5 <0 5 <0 5 <0 5 210 MW3 06/21/01 854 1842 -988 000 <0 5 <0 5 <0 5 <0 5 160 2 9 MW3 06/21/01 854 <5* MW3 09/20/01 854 1955 -1101 000 -- -- -- _- -- <5* MW3 12/04/01 851 1935 -1084 000 077 <05 <05 <05 71 4 MW3 03/05/02 8 51 1850 -999 000 260 100 0 50 160 290 h 760 <0 5* MW3 03/05/02 851 -- MW3 06/11/02 8 51 18 88 -1037 000 -- -- -- -- -- MW3 09/10/02 851 2020 -1169 000 16 2 6 18 5 9 246 h 6 5 <0 5* MW3 09/10/02 851 323 h < MW3 12/18/02 8 51 1997 -1146 000 28 21 16 47 0 5 MW3 03/24/03 851 1940 -1089 000 -- -- -- -- 755 5 h <0 5 MW3 03/25/03 851 -- -- -- 500 18 4 0 5 6 MW3 06/11/03 851 1956 -1105 000 182 61 148 123 1,510 h 05* MW3 06/11/03 851 MW3 09/17/03 8 51 2094 -1243 000 9 20 6 2 12 4 16 7 1,510 h 0 5* MW3 09/17/03 851 MW3 12/08/03 851 2094 -1243 0 00 570 6 1 9 0 11 I 1,270 h 065 MW3 12/08/03 951 MW3 03102104 851 1945 -1094 000 680 4 4 10 4 9 7 940 h 22 4 Page 8 of 56 g 1pro3ects%739421masterlwp\q I204L3942gw xls