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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHWG 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 RW4 09/11/00 7 86 1795 -10 09 000 5 7 5 8 1 7 7 7 550 <0 5 RW4 12/13/00 7 86 1785 -999 000 56 088 17 4 4 820 <0 5 RW4 03/08/01 7 86 1710 -924 000 <0 5 1 1 3 5 13 9 640 5 5 RW4 06/21/01 7 86 1833 -1047 000 3 6 081 13 251 350 6 4 RW4 06/21/01 7 86 <5* RW4 09/20/01 7 86 1958 -1172 000 <2 5 <2 5 <2 5 <2 5 270 <2 5 RW4 12/04/01 786 1947 -1161 000 190 76 320 349 2,600 <5* RW4 03/05/02 786 1865 -1079 000 -- -- -- -- -- -- RW4 03/06/02 7 86 -- -- -- 198 740 316 304 2,350 h 200 RW4 03/06/02 7 86 <0 5* RW4 06/11/02 7 86 1913 -1127 000 108 470 230 246 2,520 h 19 0 RW4 06/11/02 7 86 <0 5* RW4 09/10/02 786 2038 -1252 000 599 186 1,240 802 14,800 h 134 RW4 09/10/02 786 <5* RW4 12/18/02 786 2014 -1228 000 115 450 195 189 1,750 h 200 RW4 12/18/02 786 <5* RW4 03/24/03 786 1950 -1164 000 -- -- -- -- -- -- RW4 03/25/03 7 86 -- -- -- 742 264 117 117 1,400 h 7 6 RW4 03/25/03 786 <0 5* RW4 06/11/03 786 1974 -1188 000 112 337 192 159 2,190 h 467 RW4 06/11/03 7 86 <0 5* RW4 09/17/03 786 2120 -1334 000 830 290 148 115 1,740 h 197 RW4 09/17/03 786 <0 5* RW4 12/08/03 7 86 21 14 43 28 000 122 366 162 134 2,340 h 9 4 RW4 12/08/03 786 <0 5* RW4 03/02/04 786 1967 -11 81 000 108 415 135 164 1,940 h 355 RW4 03/02/04 786 <0 5* RW4 06/28/04 7 86 2090 -1304 000 636 189 80 4 85 8 1,180 h 8 2 RW4 06/28/04 786 <0 5* RW4 09/27/04 7 86 2191 -1405 000 994 276 111 112 1,590 h 292 RW4 09/28/04 7 86 <0 5* RW4 12/01/04 7 86 2152 -1366 0 00 94 1 292 112 134 1,470 h 322 RW4 12/01/04 786 <0 5* g1projects173942VTmter\wp1gO605\3942gw As Page 41 of 59