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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHfNG 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 MW2 05/11/95 877 24 19 -1542 000 34 41 83 1,000 5,200 - MW2 08/24/95 8 77 2280 -1403 000 80 <5 0 150 130 2,800 -- MW2 10/19/95 877 2599 -1722 0 00 24 <5 0 48 13 1,300 <25 MW2 02/13/96 877 2384 -1507 000 49 <2 5 65 17 1,300 -- MW2 04/18/96 877 2098 -1221 000 MW2 08/08/96 877 2275 -1398 000 19 <0 5 41 11 490 6 8 MW2 11/04/96 877 2277 -1400 000 25 <0 5 65 14 810 21 MW2 02/03/97 877- 1861 -984 000 MW2 05/08/97 749 1825 -1076 000 12 <0 5 1 1 <0 5 73 <2 5 MW2 08/26/97 749 2003 -1254 000 MW2 11/11/97 749 2056 -1307 000 32 <05 34 071 160 52 MW2 03/03/98 749 1490 -741 000 14 <0 5 1 2 <0 5 110 3 3 MW2 03/03/98 749 <2 0* MW2 05/20/98 749 1486 -737 000 1 5 <0 5 1 1 <0 5 110e 4 1 MW2 05/20/98 749 <2 0* MW2 08/19/98 749 1636 -887 000 <0 5 2 1 12 <0 5 110 <2 5 MW2 08/19/98 749 <2 0* MW2 11/18/98 749 1673 -924 000 -- MW2 03/30/99 749 MW2 05/05/99 749 1520 -771 000MW2 08/20/99 749 1668 -919 000 101 456 808 242 253 681 MW2 12/06/99 749 16 88 -939 000 <1 <1 <1 <1 52 <1 MW2 02/29/00 749 1442 -6 93 000 <1 <1 <1 <1 <50 <1 MW2 05/16/00 749 1445 -696 000 <1 <1 <1 <1 <50 <1 MW2 09/11/00 749 1682 -933 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 MW2 12/13/00 749 1667 -9 18 000 2 6 1 5 9 69 <0 5 MW2 03/08/01 749 15 81 -832 0 00 <0 5 <0 5 <0 5 <0 5 <50 <0 5 MW2 06/21101 749 17 15 -966 000 <0 5 <0 5 <0 5 <0 5 81 12 MW2 06/21/01 749 <5* MW2 09/20/01 749 1781 -1032 000 MW2 12/04/01 715 1779 -1064 000 096 <0 5 <0 5 <0 5 61 10* MW2 03/05/02 7 15 1655 -940 000 170 <0 5 <0 5 <0 5 101 h 190 g 1projects173942Umasfer\wplq 1202U 942gw As Page 5 of 45