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T { <br /> Groundwater Monitoring Ddfa and Analytical Results • <br /> Tosco (Unocal) Service Station/16981 � <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Well 1D/ Date DTW GWE TPH(G) B T E X MTBE <br /> TOC* (ft) (ft.) < ._____ b-_�._______._ - <br /> MW-1 02/21/90 - -- 660 1 7 1 9 <0 5 056 -- <br /> 10/18/90 DRY - - -- -- -- -- -- <br /> 11l19190 DRY - -- -- -- -- -- -- <br /> 12/27/90 DRY -- -- -- -- -- -- <br /> 01l28191 DRY -- - - - -- - -- <br /> 04/02/91 DRY -- - - -- -- -- -- <br /> 07/18/91 DRY -- - - - -- -- <br /> 09/30/91 DRY -- - - -- -- -- <br /> 11/14/91 DRY -- - - -- -- - <br /> 04l16192 DRY -- - -- - -- -- -- <br /> 07/30/92 DRY - - -- -- -- -- <br /> 10/21-22192 DRY -- - - - -- -- <br /> 01/13/93 DRY - - - -- -- -- <br /> 10 41 04/26/93 4912 -3871 1,400 16 <5 0 <50 <50 -- <br /> 07/26/93 50 13 -3972 550 12 95 <10 75 -- <br /> 10/20/93 50 65 -4024 440 05 099 <0 5 2 1 -- <br /> 1/17-18194 48 18 -3777 990 15 10 39 150 -- <br /> 4/25-26194 46 10 -35 69 180 2 1 1 7 <0 5 1 5 -- <br /> 7/25-26194 4845 -3804 <50 <05 <05 <0 5 <0 5 -- <br /> 10/26-27194 4966 -3925 68' 40 <05 <0 5 <0 5 -- <br /> 1/25-26195 4728 -3687 <50 <05 <05 <0 5 <05 -- <br /> 4/26-27195 4232 -31 91 <50 <05 064 <0 5 075 -- <br /> 07/26/95 43 35 -3294 <50 <05 064 <0 5 084 -- <br /> 10/25-26195 4423 -33 82 - -- - -- -- <br /> 01/24/96 41 41 -31 00 <250 <2 5 <2 5 <2 5 <25 J <br /> 04/25/96 3675 -2634 -- -- -- - -- -- <br /> 07/24/96 37 15 0-26 74 <50 <05 <05 <05 <05 <5 0 <br /> 10/23/96 38 88 -2847 SAMPLED SEMI-ANNUALLY - -- - -- <br /> 01/20/97 3552 -25 11 <50 <0 5 <0 5 <05 <05 <5 0 <br /> 07/16/97 3272 -22 31 <50 <0 5 <05 <05 <05 <5 0 <br /> 10/15/974 INACCESSIBLE - -- -- -- -- -- <br /> 12/8/974 INACCESSIBLE -- -- -- <br /> 03/05/98 3046 -2005 <50 <0 50 <0 50 <0 50 <0 50 <2 512 06 <br /> 05127/98 2671 -1630 <50 35 <0 50 <0 50 <0 50 321306 <br /> 6981 xls/#180138 1 As of 05/27/98 <br />