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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 Xylenes TPH-g MTBE MW 10 08/19/98 729 <2 0* MW10 11/18/98 729 1747 -1018 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 M W 10 03/30/99 729 1554 -825 000 -- -- -- -- -- -- MW 10 05/05/99 729 1584 -8 55 0 00 <0 5 <0 5 <0 5 <0 5 <50 <2 0 M W 10 08/20/99 7 29 -- -- -- -- -- -- -- MW 10 12/06/99 7 29 1766 -1037 000 -- -- -- -- -- -- M W 10 02/29/00 729 1534 -805 000 <1 <1 MW 10 05/16/00 729 1542 -8 13 000 -- -- -- -- -- -- M W 10 09111/00 729 1743 -1014 000 0 8 2 <0 5 197 50 <0 5 M W 10 12/13/00 729 1729 -1000 000 <0 5 <0 5 <0 5 <0 5 62 <0 5 MW 1 O 03/08/01 729 1654 -925 000 <0 5 <0 5 <0 5 <0 5 78 <0 5 M W 10 06/21/01 729 1792 -1063 000 <0 5 <0 5 <0 5 <0 5 <50 1 2 MW10 06/21/01 729 <54 MW 10 09/20/01 729 1911 -1182 000 -- -- -- -- -- -- MW 10 12/04/01 725 1889 -1164 000 -- -- -- -- -- -- M W 10 03/06/02 725 1790 -1065 000 3 10 <0 5 <0 5 <0 5 369 h 140 MW 10 03/06/02 7 25 <0 5* M W 10 06/11/02 725 -- -- -- -- -- -- __ MW10 09/10/02 725 M W 10 12/18/02 725 -- -- -- -- -- -- -- _- -- M W I O 03/24/03 725 1226 -501 000 350 <0 5 <0 5 <0 5 541 h 8 6 M W 10 03/24/03 725 <0 5* MW 10 06/11/03 725 19 15 -11 90 000 560 0 5 12 3 9 663 h 142 MW IO 06/11/03 725 <0 5* M W 10 09/17/03 7 25 2064 -13 39 000 410 <0 5 <0 5 2 2 594 h 11 0 MW10 09/17/03 725 <0 5* MW 10 12/08/03 7 25 2054 -13 29 000 175 17 0 7 3 1 1,030 h 9 7 MW10 12/08/03 725 <0 5* MIVV10 03/02/04 725 1919 -1194 0 00 148 11 0 7 2 1 794 li 163 MW10 03/02/04 725 <0 5* MW 1 l 05/02/91 10 15 3839 -2824 000 <0 3 <0 3 <0 3 <1 <50 -- 6 5projects1739421masterlwplg030413942sw x1s Page 22 of 52