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Tab 1 <br /> Groundwater Monitor ng <br /> and Analytical Results <br /> Former Tosco(Unocal) ervice Station#6981 <br /> 4707 Pacific Avenue <br /> Stockton,Californua Y <br /> W1rLL ID/ DATE DTW 9.1. UWE TPH,U ,D T E x MT11C <br /> TUC*(ft) (9.) 000 00 (ppb) Wk) M—) (Ppb) (pp N (pp b) <br /> MW-5 02/21/90 -- 50 0-55 0 -- 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 /> 04/02/91 DRY -- -- -- -- -- -- <br /> 07/18/91 DRY -- -- -- -- - - - <br /> 09/30/91 DRY -- -- -- -- _- -- -- <br /> 11/14/91 DRY <br /> 04/16/92 DRY <br /> 07/30/92 DRY -- -- -- - -- - <br /> 10/21-22/92 DRY -- -- -- -- -- -- -- <br /> 01/13/93 DRY -- -- -- -- -- -- <br /> 1176 <br /> -1176 04/26/93 5082 -3906 60,000 28,000 <250 <250 <250 -- <br /> 07/26/93 5181 4005 43,000 19,000 240 <125 <125 -- <br /> 10/20/93 5235 -4059 21,000 15,000 120 <50 68 -- <br /> 01/17-18/94 4983 -3807 23,000 13,000 100 <50 75 -- <br /> 04/25-26/94 4775 -35 99 16,000 12,000 92 31 70 -- <br /> 07/25-26/94 50 16 -3840 NOT SAMPLED DUE.TO CONSTRUCTION -- -- <br /> 10/26-27/94 5126 -3950 13,000 10,000 790 <20 270 -- <br /> 01/25-26/95 4862 -3686 5,000 3,700 27 <0 5 44 -- <br /> 04/26-27/95 4397 -3221 2,900 650 12 23 16 -- <br /> 07/27/95 4503 -33 27 150 21 24 <1 0 19 -- <br /> 10/25-26/95 4992 -38 16 -- -- -- -- -- <br /> 01125/96 43 11 -3135 86 69 085 <0 5 084 — <br /> 04/25/96 3831 -2655 -- _- -- -- <br /> 07/24/96 3868 -2692 <50 <0 5 <0 5 <0 5 <0 5 69/696 <br /> 10/23/96 4053 -2877 SAMPLED SEMI-ANNUALLY -- -- -- <br /> 01/20/97 3682 -2506 <50 <0 5 <0 5 <0 5 <0 5 25 <br /> 07/16/97 3432 -2256 <50 <0 5 <0 5 <0 5 <0 5 34 <br /> 10/15/97 36 18 -2442 <50 <0 5 <0 5 <0 5 <0 5 <5 0 <br /> 12/08/97 3605 -2429 -- -- -- -- -- -- <br /> 03/05/98 31 66 -1990 <50 <0 50 <0 50 <0 50 <0 50 23/186 <br /> 6981 xis/#180138 7 As of 06/26/03 <br />