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Groundwater Momtormg�ata1 and Analytical Results <br /> Tosco (Unocal) Service Station#6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> WeR 1D1 Data DTW GWE TPH(G) B T E X MTBE <br /> TOC' (ft.) (ft) (ppb) (Ppb) (Ppb) (ppb) Wb) b) <br /> MW-4 09/30/91 DRY -- -- -- -- -- -- -- <br /> (cont) 11/14/91 DRY -- -- - <br /> 04/16/92 DRY -- -- -- -- -- -- <br /> 07/30/92 DRY -- -- -- -- -- -- <br /> 10/21-22192 DRY - -- -- -- -- --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 3,6001 490 <20 <20 <20 -- <br /> 01/17-18194 4953 -3790 3,800 160 47 23 110 -- <br /> 04/25-26/94 4743 -35 80 2,200 200 50 <10 72 -- <br /> 07/25-26194 4988 -38 25 850 74 24 <05 6 1 -- <br /> 10/26-27/94 5104 -3941 650 20 22 <1 0 46 -- <br /> 01/25-26195 4829 -3666 240 24 <05 <05 094 -- <br /> 04/26-27/95 43 83 -3220 250 24 071 <0 5 1 5 -- <br /> 07/27/95 4482 -33 19 130 1 5 1 7 <0 5 2 1 -- <br /> 10125-26195 45 67 -3404 - -- -- -- -- <br /> 01/25/96 4282 -31 19 <50 14 <05 <0 5 <05 --3 <br /> 04/25/96 3824 -2661 - -- -- -- -- __ <br /> 07/24/96 38 55 -2692 <50 <05 <05 <05 <0 5 60 <br /> 10/23/96 4030 -28 67 SAMPLED SEMI-ANNUALLY -- -- -- - <br /> 01/20/97 3679 -25 16 <50 <0 5 <05 <05 <0 5 12 <br /> 07/16/97 34 18 -2255 <50 <0 5 <05 <05 <05 <5 01256 <br /> 10/15/97 3597 -24 34 <50 <0 5 <05 <05 <05 <5 013 06 <br /> 12108/97 35 74 -24 11 -- - -- -- - -- <br /> 03/05/98 3171 -2008 3,5009 <5 0 6 1 5 9 220 381346 <br /> 05/27/98 2829 -1666 <50 3 3 <0 50 <0 50 <0 50 271326 <br /> 07/21/98 28 31 -1668 <50 <0 50 1 8 <0 50 23 18/186 <br /> 10/14/98 2926 -1763 <50 <0 50 <0 50 <0 50 <0 50 141106 <br /> MW-5 02/21/90 -- - 3,600 77 16 05 17 -- <br /> 10/18/90 DRY -- - -- -- -- -- -- <br /> 11/19/90 DRY -- -- -- -- -- __ __ <br /> 12/27/90 DRY <br /> 01/28/91 DRY -- -- - -- <br /> 6981 xls/6180138 4 As of 10/14/98 <br /> I <br />