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1♦ � � � � 1♦ � � � ' � i i i i i <br /> • i • I <br /> TABLE ] 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 /> MWI 11/11/97 643 19 15 -1272 000 -- -- --MWI 03/03/98 643 13 30 -687 000MWI 05/20/98 643 1348 -705 000 -- -- -- -- -- -- <br /> MWI 08/19/98 643 1492 -849 000 -- -- -- -- -- -- <br /> MWI 11/18/98 643 1534 -891 000 <05 <05 <05 <05 <50 <25 <br /> MWI 03/30/99 643 -- -- -- -- -- -- -- -- -- <br /> MWI 05/05/99 6 43 13 88 -745 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> M W 1 08/20/99 643 1526 -8 83 000 -- -- -- -- -- -- <br /> MWI 12/06/99 643 1542 -899 000 -- -- -- -- -- -- <br /> M W 1 02/29/00 643 -- -- -- <br /> MWI <br /> -MW1 05/16/00 643 13 19 -676 000 -- -- -- -- -- -- <br /> MWI <br /> - <br /> MW1 09/11/00 643 1544 -901 000 <0 5 <0 5 <0 5 071 <50 <0 5 <br /> MWI 12/13/00 643 1538 -895 000 <0 5 <0 5 <0 5 071 <50 <0 5 <br /> MWI 03/08/01 643 -- -- -- -- -- -- -- -- -- <br /> MWI <br /> -MWi 06/21/01 643 1586 -943 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 <br /> MWI 09/20/01 643 1693 -1050 000 -- -- -- -- -- -- <br /> MW 1 12/04/01 638 1671 -1033 000 -- -- -- -- -- -- <br /> MWI 03/05/02 638 1600 -962 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MWI 06/11/02 638 1649 -1011 000 -- -- -- -- -- -- <br /> MWI 09/10/02 638 1750 -11 12 000 -- -- -- -- --MWI 12/18/02 638 1726 -1088 000 -- -- -- -- -- <br /> MW2 01187 877 -- -- -- 26 190 -- 1,100 11,000 -- <br /> MW2 07/16/87 877 1880 -1003 000 68 26 630 1,320 4,800 -- <br /> MW2 04/11/88 877 2189 -13 12 000 94 <20 240 880 11,000 -- <br /> MW2 09/13/88 877 2432 -15 55 000 600 62 520 1,900 7,400 -- <br /> MW2 11/16/88 877 24 47 -1570 000 840 140 650 1,600 10,000 -- <br /> MW2 02/09/89 8 77 2902 -2025 000 480 55 660 1,700 7,200 -- <br /> MW2 05/31/89 8 77 25 69 -1692 000 680 62 800 3,100 17,000 -- <br /> MW2 08/17/89 877 2733 -1856 000 2,100 430 350 1,700 15,000 -- <br /> MW2 12/19/89 8 77 2768 -18 91 0 00 -- -- -- -- -- -- <br /> MW2 8 77 Well dry since 03/21/90 <br /> G Wrojects1739421MASTERIWP\WP030313942gw xis Page 4 of 45 <br />