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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 MW9 05/11/95 7 88 2396 -1608 000 2,500 68 110 490 8,300 -- MW9 08/24/95 788 2439 -1651 000 490 6 0 38 110 1,200 -- MW9 10/19/95 788 2485 -1697 000 840 120 100 320 4,900 79 MW9 02/13/96 788 2255 -1467 000 890 <10 110 220 4,400 -- MW9 04/18/96 788 2035 -1247 000 780 220 110 460 5,700 <125 MW9 08/08/96 7 88 2156 -1368 000 510 <10 88 260 2,700 230 MW9 11/04/96 788 2194 -1406 000 370 <10 24 26 1,700 160 MW9 02/03/97 7 88 1751 -963 000 320 16 56 160 1,600 230 MW9 05/08/97 6 57 1725 -1068 000 310 <5 0 39 57 2,600 250 MW9 08126/97 657 1905 -1248 000 64 <2 0 <2 0 <2 0 1,100 150 MW9 11111/97 657 1947 -1290 000 31 <1 2 <1 2 <1 2 750 c 170 180* MW9 11/11/97 657 MW9 03/03/98 657 1381 -724 000 22 <0 5 15 2 0 540 60 68* MW9 03/03/98 657 MW9 05/20/98 6 57 13 86 -7 29 0 00 3 5 <0 5 <0 5 <0 5 220e 22 20* MW9 05/20/98 657 6 8 <0 5 <0 5 3 MW9 08/19/98 657 1550 -8 93 000 0 81 40 45 44* MW9 08/19/98 6 57 MW9 11/18/98 657 1573 -916 000 <OS <OS <OS <OS 310c 18 MW9 03/30/99 6 57 13 85 -728 0 00 -- -- MW9 05/05/99 657 1423 -766 000 <0 5 <0 5 <0 5 <0 5 93 1 5 12 MW9 08/20/99 657 1569 -9 12 000 -- -- '- -- MW9 12/06/99 657 15 83 -926 000 -- -- -- -- -- MW9 02/29/00 657 13 33 -676 000 <1 <1 <1 <1 <50 48 MW9 05/16/00 657 1339 -682 000 -- -- -- "- MW9 09/11/00 657 -- -- -- -- MW9 12/13/00 657 -- -- -" -" -- MW9 03/08/01 657 1472 -8 15 000 <0 5 <0 5 <0 5 <0 5 <50 7 6 MW9 06/21/01 657 1614 -9 57 000 <0 5 <0 5 <0 5 <0 5 110 17 19* MW9 06/21/01 657 MW9 09/20/01 657 17 17 -1060 000 -- -- -- " -- MW9 12/04/01 652 16 85 -1033 000 -- -- -- "- -- MW9 03105102 652 1600 -948 000 -- -- -- -- -- Page 20 of 56 glprojects1739421master%wp1gl204%3942gw xls