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T�1 <br /> Groundwater Monitoring�Ca and Analytical Results • <br /> Tosco(Unocal)Service Station#6981 <br /> 4707 Pacific Avenue <br /> Stockton,California <br /> WELL IDI DATE DTW S1 GWE TPH-G B T E X MTBE <br /> TGC* (ft) (fl' bgs) ("19I) (Ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> MW-4 02/21/90 51 0-55 0 -- 2,600 27 10 12 15 -- <br /> 10/18/90 DRY -- -- - -- "" <br /> 11/19/90 DRY - <br /> 12/27/90 DRY - <br /> 01/28/91 DRY -- - - -- -- "" <br /> 04/02/91 DRY -- - - -- -- ` <br /> 07/18/91 DRY - -- -- -- - -- ' <br /> 09/30/91 DRY - <br /> 11/14/91 DRY - - -- -- "" <br /> 04/16/92 DRY <br /> 07/30/92 DRY -- -- - -- "" <br /> 10/21-22192 DRY <br /> 01/13/93 DRY - - -1163 04/26/93 5052 -3889 11,000 1,400 <50 <50 <50 -- <br /> 07/26/93 5154 -3991 5,700 800 16 22 <125 - <br /> 10/20/93 5203 -4040 3,6001 490 <20 <20 <20 -- <br /> 01/17-18194 4953 -3790 3,800 160 47 23 110 -- <br /> 04/25-26/94 4743 -3580 2,200 200 50 <10 72 - <br /> 07/25-26194 4988 -3825 850 74 24 <0 5 61 - <br /> 10126-27194 5104 -3941 650 20 22 <1 0 46 - <br /> 01/25-26/95 4829 -3666 240 24 <0 5 <0 5 094 -- <br /> 04126-27195 43 83 -3220 250 24 071 <0 5 1 5 -- <br /> 07127195 4482 -33 19 130 1 5 1 7 <05 21 -- <br /> 10/25-26195 4567 -3404 - - -- -- -- - <br /> 01/25/96 4282 -31 19 <50 14 <0 5 <0 5 <0 5 --3 <br /> 04/25/96 3824 -2661 -- -- - - - -- <br /> 07l24/96 3855 -2692 <50 <0 5 <0 5 <0 5 <0 5 60 <br /> 10/23/96 4030 -2867 SAMPLED SEMI-ANNUALLY -- - -01/20/97 3679 -25 16 <50 <0 5 <0 5 <0 5 <05 12 <br /> 07/16/97 34 18 -2255 <50 <0 5 <0 5 <0 5 <0 5 <5 0/256 <br /> 10/15/97 3597 -2434 <50 <0 5 <0 5 <0 5 <0 5 <5 013 06 <br /> 12/08/97 3574 -2411 - - -- - -- <br /> 6981 xis/#180138 5 As of 03/08/01 <br />