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.,..� .�� ,. � ■� +� ■www �� +� �� # ! 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- Nln-nber Date _ _ (feet) (feet) _ (feet) (feet) Benzene _ Toluene benzene Xylenes _TPH-g MTBE MW9 05/08/97 657 1725 -1068 000 310 <5 0 39 57 2,600 250 NII\V9 08/26/97 657 1905 -1248 000 64 <2 0 <2 0 <2 0 1,100 150 MW9 11/11/97 657 1947 -1290 000 31 <1 2 <1 2 <1 2 750 c 170 MW9 11/11/97 6 57 180* MW9 03/03/98 6 57 13 81 -724 000 22 <0 5 1 5 2 0 540 60 MW9 03/03/98 6 57 68* NIW9 05/20/98 6 57 1386 -729 000 3 5 <0 5 <0 5 <0 5 220e 22 NIW9 05/20/98 6 57 20* MW9 08/19/98 6 57 1550 -893 000 0 81 6 8 <0 5 <0 5 340 45 MW9 08/19/98 657 44* MW9 11/18/98 657 1573 -916 000 <0 5 <0 5 <0 5 <0 5 310 c 18 NIW9 03/30/99 657 13 85 -728 000 -- -- -- __ All W9 05/05/99 657 1423 -766 000 <0 5 <0 5 <0 5 <0 5 93 1 5 12 M W9 08/20/99 6 57 1569 -9 12 000 -- -- __ __ NIW9 12/06/99 657 1583 -926 0 00 -- __ _- _- __ N4W9 02/29/00 657 1333 -676 000 <1 <1 <1 <1 <50 4 8 NI%V9 05/16/00 657 1339 -6 82 000 -_ __ __ __ -- MW9 _MW9 09/11/00 657 -- _- __ _- -- -- -- -- _ MW9 12/13/00 657 -- -- __ __ MW9 03/08/01 657 1472 -815 000 <0 5 <0 5 <0 5 <0 5 <50 7 6 MW9 06/21/01 657 16 14 -957 000 <0 5 <0 5 <0 5 <0 5 110 17 NIW9 06/21/01 657 19* NIW9 09/20/01 657 17 17 -1060 000 -- -- -- _- _- M W9 12/04/01 652 16 85 -1033 000 MW9 03/05/02 652 1600 -948 000 -- -- -- __ N-1 W 9 03/06/02 652 -- -- -- <0 5 <0 5 <0 5 <0 5 101 h 102 NIW9 03/06/02 652 150* MW9 06/11/02 6 52 -- __ __ -_ VW9 09/10/02 652 1772 -1120 0 00 MW9 12/18/02 6 52 1738 -1086 000 MW9 03/24/03 6 52 1696 -1044 000 -- -- -- -- MW9 03/25/03 6 52 -- -- -- <0 5 <0 5 <0 5 <0 5 <50 h 283 S�progeas1739424masterlwplq 120313942gw As Page 19 of 51