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db <br /> Groundwater Monitoringing D D nd Analytical Results <br /> Tosco(Unocal)Service Station#6981 <br /> 4707 Pacific Avenue <br /> Stockton,California <br /> WELT,IDI DATE DTW S,L GWE TPH•G B T E % MTBE <br /> TOC* (ft} (ft bg5) (mst) (ppb) (ppb) fPpb) (Ppb) (ppb) (ppb) <br /> (MW-14)7 02/28/94 -- -- - <50 <0 5 <0 5 <0 5 <0 5 -- <br /> VW-1 <br /> NA 07/24/96 3827 24 5-49 5 - 180 1 9 19 16 77 130 <br /> 10/23/96 -- - SAMPLED SEMI-ANNUALLY <br /> 01/21/97 3647 -- <50 <0 5 <0 5 <0 5 <0 5 <5 0 <br /> 07/16/97 3389 -- <50 <0 5 <05 <0 5 <0 5 <5 0 <br /> 10/15/97 3572 - <50 <0 5 <0 5 <0 5 <0 5 <5 0/<2 06 <br /> 12/08/97 3562 - - -- - - -- <br /> 03/05/98 31 33 -- <50 <0 50 <0 50 <0 50 <0 50 <2 51<2 06 <br /> 05/27/98 2792 -- <50 <0 50 <0 50 <0 50 <0 50 <2 5/<2 06 <br /> 07/21/98 2798 - <50 <0 50 14 <0 50 14 <5 0/<2 06 <br /> 10/14/98 2900 - <50 <0 50 <0 50 <0 50 <0 50 <2 5/<2 06 <br /> 01125-26/99 28 19 - <50 <0 50 <0 50 <0 50 <0 50 <2 5/2 56 <br /> 04119-20199 2576 - <50 <0 50 <0 50 <0 50 <0 50 52/30 6 <br /> 07115-16/99 2709 - <50 <0 50 <0 50 <0 50 <0 50 <2 5/<2 06 <br /> 10/25-26/99 2875 -- <50 <0 50 <0 50 <0 50 <0 50 <2 5/<2 06 <br /> 01127-28/00 2829 - <50 095 <0 50 <0 50 063 10/46 6 <br /> 06/26-27100 2547 -- <50 0 <0 500 1 13 <0 500 128 <5 00/2 776 <br /> 1090 09122-23/00 2743 -1653 <50 <0 50 <0 50 <0 50 <0 50 87/696 <br /> 12126-27100 2743 -1653 <50 0 <0 500 <0 500 <0 500 <0 500 <5 00/<2 006 <br /> 03107-08/01 2719 -1628 <50 0 <0 500 <0 500 <0 500 <0 500 <5 00/<2 006 <br /> 06126-27/01 2806 -1716 <50 <0 50 <0 50 <0 50 <0 50 <5 01<2 06 <br /> VW-2 <br /> NA 07/24/96 3867 25 5-50 5 -- 78,000 510 3,100 540 24,000 720/5606 <br /> 10/15/96 DRY -- -- - -- - <br /> 10/23/96 -- - SAMPLED SEMI-ANNUALLY -- - -- -- <br /> 01/20/97 3707 - INSUFFICIENT WATER TO SAMPLE -- -- -- <br /> 07/16/97 DRY -- -- -- - -- '- -- <br /> 6981 xis/#180138 17 As of 06/27/01 <br />