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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 /> No Datefeet msl feet feet ms1 <br /> ( } (feet) ( ) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> IW I 05/20/98 690 <2 0* <br /> 08/19/98 15 66 -876 000 12 <2 5 120 79 1,600 28 <br /> 08/19/98 <4 0* <br /> 11/18/98 1602 -9 12 000 16 <5 0 78 40 1,300 26 <br /> 03130!99 -- -- -- -- -- _- -- -- -- <br /> 05/05/99 1452 -762 000 1 56 <1 0 148 725 2,170 106 <br /> 08/20/99 1600 -9 10 000 -- __ _- __ -- <br /> 12/06/99 1622 -932 000 <1 <1 19 8 5 420 19 <br /> 02/29/00 13 73 -683 000 <1 <1 <1 <1 68 <1 <br /> 05/16/00 13 82 -692 000 7 6 <1 1 6 <1 490 2 4 <br /> 09/11/00 1615 -925 000 0 51 <0 5 096 <0 5 590 <0 5 <br /> MW1 01187 776 -- -- -- <1 <1 -- <1 <50 -- <br /> 07/16/87 -- -- -- <0 5 1 5 <0 5 <0 50 <100 -- <br /> 04/11/88 2051 -12 75 000 <0 5 <0 5 <0 5 <0 5 <100 -- <br /> 09/13/88 22 18 -1442 000 19 2 5 <0 5 <0 5 70 -- <br /> 11/16/88 2307 -1531 000 <0 5 9 5 <0 5 <0 5 130 -- <br /> 02/09/89 22 64 -1488 000 17 0 2 0 2 0 6 <250 -- <br /> 05/31/89 2926 -21 50 000 <0 5 <0 5 <0 5 0 8 <250 -- <br /> 08/17/89 25 87 -18 11 000 <0 5 <0 5 <0 5 <0 5 <250 -- <br /> 12/19/89 2922 -2146 000 <0 5 19 <0 5 <0 5 <250 -- <br /> 03/21/90 2746 -1970 000 <0 5 <0 5 0 8 2 9 80 -- <br /> 05/17/90 2824 -2048 000 <0 5 4 5 <0 5 <0 5 120 -- <br /> 09/25/90 2959 -2183 000 <0 5 7 0 1 0 4 7 170 -- <br /> 12/19/90 Dry __ __ __ __ -- <br /> 01/30/91 <br /> _01/30191 Dry <br /> 05/02/91 Dry <br /> 07116-17/91 Dry <br /> 10/15/91 2995 -22 19 a 000 <br /> 01/28/92 2970 -21 94 a 000 <br /> 04130192 2926 -2150 000 -- -- -- - __ __ <br /> f 1pz o3ects4739421niaster4K p5g90013942),w xls Pate 2 of 37 <br />