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i T1 • <br /> Groundwater MonitoringlWta and Analytical Results <br /> Tosco (Unocal) Service Station#6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Well ID/ Date DTW GWE TPH(G) B T E MTBE <br /> TOC* (ft,) (ff ) <----------------------- <br /> MW-4 07/18/91 DRY <br /> (cont) 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 -38 89 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 -37 90 3,800 160 47 23 110 - <br /> 04125-26194 4743 -35 80 2,200 200 50 <10 72 -- <br /> 07/25-26194 4988 -3825 850 74 24 <05 6 1 -- <br /> 10126-27/94 51 04 -3941 650 20 22 <10 46 -- <br /> 01/25-26/95 4829 -36 66 240 24 <05 <05 094 -- <br /> 04/26-27195 43 83 -3220 250 24 071 <05 15 -- <br /> 07/27/95 4482 -33 19 130 1 5 l 7 <05 2 1 -- <br /> 10/25-26/95 45 67 -3404 <br /> 01/25/96 4282 -31 19 <50 14 <0 5 <05 <05 __3 <br /> 04/25/96 3824 -2661 <br /> 07/24/96 38 55 -2692 <50 <05 <05 <05 <05 60 <br /> 10/23/96 4030 -2867 SAMPLED SEMI-ANNUALLY <br /> 01/20/97 3679 -25 16 <50 <05 <0 5 <05 <05 12 <br /> 07/16/97 34 18 -2255 <50 <05 <0 5 <0 5 <05 <5 0/256 <br /> 10/15/97 35 97 -2434 <50 <0 5 <05 <05 <05 <5 0/3 06 <br /> 12/08/97 3574 -24 11 <br /> 03/05/98 31 71 -2008 3,5009 <5 0 6 1 59 220 381346 <br /> 05/27/98 2829 -1666 <50 3 3 <0 50 <0 50 <0 50 27/326 <br /> 07/21/98 2831 -1668 <50 <0 50 1 8 <0 50 23 18/186 <br /> NIW-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 /> 6981 x1s1#180138 4 As of 07/21/98 <br />