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Tab4e 1 <br /> Groundwater Monitorin a and Analytical Results . <br /> Former Tosco(Unocal)Service Station#6981 <br /> 4707 Pacific Avenue <br /> Stockton,California <br /> WELL ID/ DATE DTW ST GWE TPH G B T F, X MTBIZ <br /> TOC*(ft) (fit) (/t hg<) f ? (Ppb {P (ppb) (Ppb) 1'ppb) (pPb) <br /> MW-4 02/21/90 -- 51 0-55 0 -- 2,600 27 t0 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 /> 10121-22/92 DRY -- -- -- -- -- -- -- <br /> 01/13/93 DRY - -- --1163 04/26/93 5052 -3889 11,000 1,400 <50 <50 <50 -- <br /> 07/26/93 5154 -3991 5,700 800 16 22 <12 5 -- <br /> 10/20/93 5203 4040 3,600' 490 <20 <20 <20 -- <br /> 01117-18/94 4953 -3790 3,800 160 47 23 110 -- <br /> 04125-26194 4743 -3580 2,200 200 50 <10 72 -- <br /> 07125-26/94 4988 -3825 850 74 24 <0 5 61 -- <br /> 10/26-27194 5104 -3941 650 20 22 <1 0 46 <br /> 01/25-26/95 4829 -3666 240 24 <0 5 <0 5 094 -- <br /> 04/26-27195 4383 -3220 250 24 071 <0 5 1 5 - <br /> 07/27/95 4482 -33 19 130 1 5 17 <0 5 21 -- <br /> 10/25-26195 4567 -3404 -- -- -- -- -- -- <br /> 01/25/96 4282 -3I 19 <50 14 <05 <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 -- -- --01/20/97 3679 -2516 c50 <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 0125" <br /> 10/15/97 3597 -2434 <50 <0 5 <0 5 <0 5 <0 5 <5 013 0' <br /> 12/08/97 3574 -2411 -- -- -- - <br /> 6981 tits/#180138 5 As of 12/13/01 <br />