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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration(gg/L) Well Elevation to Water Elevation Thickness Ethyl- Number Date (feet) (feet) (feet) T (feet) Benzene Toluene benzene Xylenes TPH-g__ MTBE RW2 03/08/01 676 1523 -847 000 26 17 62 261 2,500 10 RW2 06/21/01 676 16 67 -991 000 78 9 9 43 403 3,700 24 RW2 06/21/01 676 <5* RW2 09/20/01 676 1776 -1100 000 72 46 46 697 4,600 <2 5 RW2 12/04/01 676 1754 -1078 000 39 19 150 113 3 2,800 <5* RW2 03/05/02 676 1665 -9 89 000 515 290 176 182 4,560 It 132 RW2 03/05/02 676 <0 5* RW2 06/11/02 676 1723 -1047 000 360 14 4 106 745 3,830 h 660 RW2 06/11/02 676 <0 5* RW2 09/10/02 676 1837 -1161 000 600 240 154 95 0 4,380 h 103 RW2 09/10/02 676 <5* RW2 12/18/02 676 18 12 -1136 000 540 208 134 694 2,200 h 15 5 RW2 12/18/02 676 <0 5* RW2 03/24/03 676 1740 40 64 000 262 7 5 558 257 2,950 h 274 RW2 03/24/03 6 76 <0 5* RW2 06/11/03 676 1776 -1100 000 422 15 0 813 42 7 2,450 h 62 7 RW2 06/11/03 6 76 <0 5* RW2 09/17/03 676 19 15 -1239 000 108 24 6 179 93 2 3,140 h 138 RW2 09/17/03 6 76 <0 5* RW2 12/08/03 676 19 14 -12 38 000 689 19 6 106 462 1,400 h 63 7 RW2 12/08/03 676 <0 5* RW2 03/02/04 676 1761 -10 85 0 00 586 171 113 628 5,460 h 85 0 RW2 03/02/04 676 <0 5* RW2 06/28/04 676 18 83 -12 07 0 00 -- -- -- -- -- -- RW2 06/29/04 676 -- -- -- 19 0 6 8 42 1 212 1,840 h 27 1 RW2 06/29/04 676 <0 5* RW2 09/27/04 676 1970 -1294 000 697 214 125 53 3 4,170 h 68 1 RW2 09/27/04 676 <0 5* RW2 12/01/04 676 1933 -1257 000 -- -- -- -- -- -- RW2 12/02/04 676 -- -- 188 8 3 365 221 1,530 h 25 8 RW2 12/02/04 676 <0 5* RW2 03/24/05 676 17.44 -10 68 000 103 3 0 18 4 8 8 894 h 7 9 RW2 03/24/05 676 <0 5* g Iprojects1739421master%wp1g0305U942gw xls Page 37 of 57