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w� ��w �� w �■� raw ■� �� w � � TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration ( /1) Well Elevation to Water Elevation Thickness Ethyl- Number Date (feet) (feet) (feet) - (feet) Benzene Toluene benzene Xylenes TPH-g MTBE MW8 11/04/96 7 78 2155 -1377 000 160 1,700 2,700 9,600 48,000 <250 MW8 02/03/97 7 78 1678 -900 000 <100 1,400 2,500 9,900 42,000 <120 MWS 05/08/97 645 1666 -1021 000 110 880 2,100 7,800 4I,000 120 MW8 08/26/97 645 1846 -1201 000 93 950 2,200 7,500 35,000 150 MWS 11/11/97 645 1898 -1253 000 <50 700 2,500 9,100 36,000 <250 MW8 11/11/97 645 69* MW8 03/03/98 645 l3 02 -657 000 <50 780 1,900 6,500 26,000 <250 MW8 03/03/98 645 <100* MW8 05/20/98 645 - 1336 -691 000 71 200 2,000 4,600 31,000 <125 MW8 05/20/98 645 43* MW8 08/19/98 645 14 9I -846 000 77 1,300 2,300 7,800 31,000 310 MW8 08/19/98 645 <100* MW8 11/18/98 645 15 15 -870 000 38 220 2,900 7,100 27,000 <125 MW8 03/30/99 645 1330 -685 000 -- -- -- -_ __ MW8 05/05/99 645 1367 -7 22 000 18 8 78 9 1,580 3,000 19,100 461 MW8 08/20/99 645 1515 -870 000 -- __ -- -- MW8 12/06/99 645 1525 -890 000 -- -- -- _- MW8 02/29/00 645 t2 76 -631 000 31 110 1,100 2,330 10,000 42 MW8 05/16/00 645 1297 -652 000 -- -- -- -- _- MW8 09/11/00 6 45 -- -- -- -- MW8 12/13/00 645 1520 -875 000 31 11 410 3675 4,200 37 MW8 12/13/00 645 22* MW8 03/08/01 645 1431 -786 000 15 44 880 1,545 13,000 19 MW8 06/21/01 645 1567 -922 000 13 61 240 580 5,700 17 MW8 06/21/01 645 22* MW8 09/20/01 6 45 1674 -1029 000 -- -- -_ MW8 12/04/01 642 1648 -1006 000 MW8 03/05/02 642 1570 -928 000 -- -- _- _- MW8 03/06/02 642 -- -- -- 060 500 233 577 215 h <0 5 MW8 06/11/02 642 MW8 09/10/02 6.42 -- __ -- -- -- -- -- -- MW9 04/11/88 788 2081 -1293 000 <50 <50 <50 <50 2,100 -- MW9 09/13188 7 88 23 14 -1526 000 85 67 100 90 35,000 -- g%projects%73942\jmsterlwp1g0902L3942gw x1s Page 14 of 41