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�- <br /> i � • <br /> Groundwater MonitoringtataI and Analytical Results <br /> Tosco (Unocal) Service Station#6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Well ED/ Date DTW GWE TPH(G) B T E X MTBE <br /> TOW* (ft.) (ft.) (Ppb) (ppb) (PFb) 1�b) (Ppb) (Vpbl <br /> MW-1 02/21/90 -- 660 1 7 l 9 <0 5 056 <br /> 10/18/90 DRY <br /> 11/19/90 DRY <br /> 12/27/90 DRY <br /> 01/28/91 DRY <br /> 04/02/91 DRY07/18/91 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 <br /> 1041 04/26/93 49 I2 -38 71 1,400 16 <50 <5 0 <5 0 -- <br /> 07/26/93 50 13 -3972 550 12 95 <10 75 -- <br /> 10/20/93 5065 -4024 440 05 099 <0 5 2 1 -- <br /> 01/17-18/94 48 18 -3777 990 15 10 39 150 <br /> 04/25-26/94 46 10 -3569 180 2 1 l 7 <05 1 5 -- <br /> 07/25-26/94 4845 -3804 <50 <05 <05 <0 5 <05 <br /> 10126-27194 4966 -3925 68' 40 <0 5 <05 <05 -- <br /> 01/25-26195 4728 -3687 <50 <0 5 <05 <05 <0 5 -- <br /> 04/26-27/95 4232 -3191 <50 <05 064 <05 075 -- <br /> 07/26/95 4335 -3294 <50 <0 5 064 <05 084 -- <br /> 10/25-26/95 4423 -33 82 <br /> 01/24/96 41 41 -31 00 <250 <2 5 <25 <25 <2 5 --3 <br /> 04/25/96 36 75 -2634 <br /> 07/24/96 37 15 -2674 <50 <05 <05 <05 <05 <5 0 <br /> 10/23/96 38 88 -2847 SAMPLED SEMI-ANNUALLY <br /> 01/20/97 35 52 -25 11 <50 <0 5 <0 5 <0 5 <0 5 <5 0 <br /> 07/16/97 3272 -2231 <50 <05 <05 <05 <05 <50 <br /> 10/151974 INACCESSIBLE <br /> 12/081974 INACCESSIBLE -- <br /> 03/05/98 3046 -2005 <50 <0 50 <0 50 <0 50 <0 50 <2 5/2 06 <br /> 05/27/98 2671 -1630 <50 3 5 <0 50 <0 50 <0 50 32/306 <br /> 07/2I/98 2677 -16 36 57 22 098 <0 50 1 7 341276 <br /> 10/14/98 2775 -1734 <50 <0 50 <0 50 <0 50 069 21/206 <br /> 6981 xls/1/180138 1 As of 10/14/98 <br />