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Tabl <br /> Groundwater Monitoring Da nd 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 /> TOC* (!fl) (ft bSs) (MSI) (ppb) (ppb) (ppb) (Ppb) (Ppb) (Ppb) <br /> MW-4 12/27/90 DRY 51 0-55 0 -- -- - -- " <br /> (cont) 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 -- -- - -- - --10/21-22/92 DRY - - - -- -- -- <br /> 01/13/93 DRY -- -- -- -' "- -1163 04/26/93 5052 -3889 11,000 1,400 <50 <50 <50 -- <br /> 07/26/93 51 54 -3991 5,700 800 16 22 <125 -- <br /> 10/20/93 5203 -4040 3,600` 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 /> 07/25-26/94 4988 -3825 850 74 24 <0 5 61 -- <br /> 10/26-27/94 3104 -3941 650 20 22 <1 0 46 -- <br /> 01/25-26195 4829 -3666 240 24 <0 5 <0 5 094 -- <br /> 04/26-27195 4383 -3220 250 24 071 <0 5 15 -- <br /> 07/27/95 4482 -33 19 130 15 1 7 <05 21 -- <br /> 10/25-26/95 4567 -3404 - - -- -- - '- <br /> 01/25/96 4282 -31 19 <50 14 <0 5 <0 5 <0 5 -' <br /> 04/25/96 3824 -2661 -- -- - - -- - <br /> 07/24/96 3855 -2692 <50 <0 5 <0 5 <0 5 <0 5 60 <br /> 10/23/96 4030 -2867 SAMPLED SEMI-ANNUALLY -- - -- - <br /> 01/20/97 3679 -25 16 <50 <0 5 <0 5 <0 5 <0 5 12 <br /> 07/16/97 3418 -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 <05 <5 013 O6 <br /> 12/08/97 3574 -2411 - -- -- -- - -- <br /> 03/05/98 3171 -2008 3,5009 <5 0 61 59 220 381346 <br /> 05/27/98 2829 -1666 <50 33 <0 50 <0 50 <0 50 27/326 <br /> 07/21/98 2831 -1668 <50 <0 50 18 <0 50 23 18/186 <br /> 6981 x1s/#180138 5 As of 06/27/01 <br />