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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 <br /> Wel, Elevation to Water Elevation Thickness Ethyl- <br /> Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW8 03/08/01 645 1431 -786 000 15 44 880 1,545 13,000 19 <br /> MW8 06/21/01 645 1567 -922 000 13 61 240 580 5,700 I7 <br /> MW8 06/21/01 645 22* <br /> MW8 09/20/01 645 1674 -1029 0 00 -- -_ -- -. <br /> MW8 12/04/01 642 1648 -1006 000 <br /> MW8 03/05/02 642 1570 -928 000 -- -- -- -_ <br /> MW8 03/06/02 642 -- -- -- 060 500 233 577 215 h <0 5 <br /> MW8 06111102 642 <br /> MW8 09/10/02 642 <br /> MW8 12/18/02 642 -- __ <br /> MW8 03/24/03 642 1653 -1011 000 -- -- __ __ _- _ <br /> MW8 03/25/03 642 -- -- 255 160 752 1,980 8,580 h 12 0 <br /> MW8 03/25/03 642 9 20* <br /> MW8 06/11/03 642 1669 -1027 0 00 466 188 962 1,990 10,400 h 230 <br /> MW8 06/11/03 642 5 50* <br /> MW8 09/17/03 642 1803 -1161 000 398 195 859 1,820 9,800 h 196 <br /> MW8 09/17/03 642 6 50* <br /> MW8 12/08/03 642 1806 -1l 64 000 339 143 780 1,520 8,410 h 144 <br /> MW8 12/08/03 6 42 5 00* <br /> MW8 03/02/04 642 1651 -1009 000 180 115 726 1,370 6,800 h 165 <br /> MW8 03/02/04 642 7 00* <br /> MW8 06/28/04 642 1770 -1128 0,00 -- -- _ _ <br /> MW8 1 06/29/04 642 -- -- — 242 853 754 1,200 6,900 h 4 40* <br /> MW9 04/11/88 788 2081 -1293 000 <50 <50 <50 <50 2,100 -- <br /> MW9 09/13/88 788 23 14 -1526 000 85 67 100 90 35,000 -- <br /> MW9 11/16/88 788 23 24 -1536 000 70 12 14 19 2,200 -- <br /> MW9 02/09/89 788 22 79 -1491 000 12 16 4 1 3 4 800 -- <br /> MW9 05/31/89 788 2447 -1659 000 14 <0 5 12 13 540 -- <br /> MW9 08/17/89 7 88 2605 -18 17 000 5 <0 5 2 <0 5 <250 -- <br /> MW9 12/19/89 7 88 2697 -19 09 000 66 1 1 <0 5 12 470 -- <br /> MW9 03/21/90 7 88 2745 -1957 000 8 4 1 0 21 3 7 160 -- <br /> g 1profects1739421nasterlwp1g0704L3942gw xis Page 18 of 54 <br />