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• Ta*Daa <br /> , <br /> Groundwater Monitoring 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 X MTBE <br /> TOC* ) (ft} (ppb) (Ppb) (Ppb) (ppb) (ppb) (ppb) <br /> MW-1 02/21/90 -- 660 17 1 9 <0 5 056 -- <br /> 10/18/90 DRY -- -- -- -- -- -- -- <br /> 11/19/90 DRY -- -- -- -- " <br /> 12127/90 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 -- -- --04/16/92 DRY -- -- -- -- -- -- -- <br /> 07/30/92 DRY - - -- - -- - -- <br /> 10/21-22192 DRY - -- -- -- -- -- <br /> 01/13/93 DRY -- -- -- -- --1041 04/26/93 49 12 -3871 1,400 16 <50 <50 <50 -- <br /> 07/26/93 50 13 -3972 550 12 95 <1 0 75 -- <br /> 10/20/93 5065 -4024 440 05 099 <05 2 1 -- <br /> 01/17-18/94 48 18 -3777 990 15 10 39 150 -- <br /> 04/25-26194 46 10 -35 69 180 2 1 1 7 <0 5 15 -" <br /> 07125-26194 4845 -3804 <50 <05 <05 <0 5 <05 -- <br /> 10126-27194 4966 -3925 68' 40 <05 <0 5 <05 <br /> -- <br /> 01/25-26195 4728 -3687 <50 <0 5 <0 5 <05 <0 5 -- <br /> 04/26-27195 4232 -3191 <50 <0 5 064 <05 075 -- <br /> 07/26/95 43 35 -3294 <50 <0 5 064 <0 5 084 -- <br /> 10/25-26195 4423 -33 82 - -- -- -- -- <br /> 01/24/96 4141 -3100 <250 <2 5 <25 <25 <25 <br /> --3 <br /> 04/25/96 3675 -2634 -- -- -- -- "- <br /> 07/24/96 37 15 -2674 <50 <05 <0 5 <05 <0 5 <5 0 <br /> 10/23/96 38 88 -2847 SAMPLED SEMI-ANNUALLY -- -- -- -- <br /> 01/20/97 3552 -25 11 <50 <05 <0 5 <05 <0 5 <50 <br /> 07/16/97 3272 -2231 <50 <05 <05 <05 <05 <50 <br /> 10/15/974 INACCESSIBLE - -- - -- -- -- <br /> 12/08/974 INACCESSIBLE - -- -- - -- -- 512 06 <br /> 03/05/98 3046 -2005 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <br /> 05/27/98 2671 -1630 <50 3 5 <0 50 <0 50 <0 50 321306 <br /> 07/21/98 2677 -16 36 57 22 098 <0 50 17 341276 <br /> 10/14/98 2775 -1734 <50 <0 50 <0 50 <0 50 069 <br /> 211206 <br /> 6981 xls/#180138 1 As of 10/26/99 <br />