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�w �*� � � NNW W MEM111ir � TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 N PERSHING AVENUE, STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration(pg/L) Well Elevation to Water Elevation Thickness Ethyl- No Date (ft MS I) (ft) (ft ms 1) (ft) Benzene Toluene benzene Xylenes TPH-g MT13E M W l 2 05/02/91 9 16 35 45 -2629 000 <0 3 <0 3 <0 3 <1 <50 -- 07/16-17191 36 37 -2721 000 <0 5 <0 5 <0 5 <0 5 <50 -- 10/15/91 3695 -2779 000 <0 5 <0 5 <0 5 <0 5 <50 -- 01/28/92 3521 -2605 000 <0 5 06 <0 5 07 <50 -- 04/30/92 34 83 -25 67 000 <0 5 <0 5 <0 5 <0 5 <50 -- 08/13/92 3682 -2766 000 <0 5 <0 5 <0 5 <0 5 <50 -- 10/08/92 3754 -2838 000 <0 5 <0 5 <0 5 <0 5 <50 -- 02/23/93 34 45 -25 29 000 <0 5 <0 5 <0 5 <0 5 <50 -- 05/18/93 Not Accessible -- -- -- -- -- 08/22/93 Not Accessible -- -- -- -- -- 12/30/93 Not Accessible -- -- -- -- -- 02/17/94 Not Accessible -- -- -- -- -- 05/10/94 3105 -21 89 000 <0 5 <0 5 <0 5 <0 5 <50 -- 08/02/94 32 55 -2339 000 <0 5 <0 5 <0 5 <0 5 <50 -- 11/01/94 33 03 -23 87 000 <0 5 <0 5 <0 5 <0 5 <50 -- 02/17/95 3057 -21 4 t 000 <0 5 <0 5 <0 5 <0 5 <50 -- 05/11/95 2765 -1849 000 <0 5 <0 5 <0 5 <0 5 <50 -- 08/24/95 28 51 -1935 000 <0 5 <0 5 <0 5 <0 5 <50 -- 10/19/95 28 88 -1972 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 02/13/96 26 65 -1749 000 <0 5 <0 5 <0 5 <0 5 <50 -- 04/18/96 24 12 -1496 000 -- -- -- -- -- -- 08/08/96 2493 -15 77 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 11/04/96 25 31 -16 15 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 02/03/97 2103 -11 87 000 -- -- -- -- -- -- 05/08/97 8 75 2000 -11 25 000 -- -- -- -- -- 08/26/97 2163 -12 88 000 -- -- -- -- -- -- 11/11/97 2228 -13 53 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 03/03/98 1705 -830 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 03/03/98 <2 0* 05/20/98 1623 -748 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 1 i�rojcct5173942%mas[Lrlup1Q50013932,,tiv+cls Page 18 of 37