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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration(µg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW5 12/06/99 863 18 16 -953 000 <1 <1 <1 <1 <50 <1 <br /> MW5 02/29/00 863 1559 -696 0 00 <1 <1 <1 <1 <50 <1 <br /> MW5 05/16/00 8 63 1566 -7 03 0 00 <1 <1 <1 <1 <50 <1 <br /> MW5 09/11/00 8 63 1801 -938 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 <br /> MW5 12/13/00 8 63 1795 -932 000 <0 5 <0 5 <0 5 065 190 <0 5 <br /> MW5 03/08/01 863 17 12 -849 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 <br /> MW5 06/21/01 863 1846 -983 000 <0 5 <0 5 <0 5 064 <50 <0 5 <br /> MW5 09/20/01 863 1957 -10 94 000 052 <0 5 <0 5 13 <50 <0 5 <br /> MW5 12/04/01 858 1939 -1081 000 <05 <05 <05 <05 <50 <5* <br /> MW5 03/05/02 858 1860 -1002 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 06/11/02 858 1906 -1048 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 09/10/02 858 2020 -1162 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 12/18/02 858 1999 -1141 000 <05 <05 <05 <05 <50 h <05 <br /> MW5 03/24/03 8 58 1950 40 92 000 -- -- -- -- -- -- <br /> MW5 03/25/03 858 -- -- -- 2 10 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 06/11/03 8 58 1960 -1102 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 09/17/03 858 2094 -1236 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 12/08/03 858 2097 -1239 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 03/02/04 858 1950 -10 92 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 06/28/04 858 20 64 -1206 000 -- -- -- -- -- -- <br /> MW5 06/29/04 858 -- -- -- <0 5 15 <0 5 0 9 <50 h <0 5 <br /> MW5 09/27/04 858 2147 -12 89 000 -- -- -- -- -- -- <br /> MW5 09/28/04 858 -- -- -- <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 12/01/04 858 2122 -1264 000 -- -- -- -- -- -- <br /> MW5 12/02/04 858 -- -- -- <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW5 03/24/05 858 1931 -1073 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW6 07/16/87 892 1935 -1043 000 3,100 4,300 1,200 6,600 12,000 -- <br /> MW6 04/11/88 892 2304 -1367 062 Not sampled-LPH <br /> MW6 09/13/88 892 25 12 -1620 000 19,000 17,000 2,300 12,000 65,000 -- <br /> MW6 11/16/88 892 2551 -1658 0 01 19,000 19,000 3,000 12,000 83,000 -- <br /> MW6 02/09/89 892 24 85 -1593 Sheen Not sampled-LPH <br /> MW6 05/31/89 892 2657 -1765 000 20,000 33,000 3,100 23,000 120,000 -- <br /> g\projecls173942\master\wp\90305\3942gw xis Page 13 of 57 <br />