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Table 1 II <br /> Groundwater Monitoring Data 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* Ot) Of Pb) (ppb) (ppb) (Ppb) (ppb) ii (Ppb) <br /> II <br /> MW-4 10/14/98 2926 -17 63 <50 <0 50 <0 50 <0 50 <0 50 141106 <br /> (cont) 01125-26199 2847 -1684 <50 <0 50 <0 50 <0 50 <0 50 9 51106 <br /> 04119-20199 2606 -1443 <50 <0 50 <0 50 <0 50 <0 50 6 214 86 <br /> MW-5 02/21/90 -- -- 3 600 77 16 05 l7 - <br /> 10/18/90 DRY - -- - - -- <br /> 11/19/90 DRY - - - -- - - <br /> 12127/90 DRY -- - - - - - - <br /> 01/28/9l DRY -- - - - - - <br /> 04/02/91 DRY - - - - - <br /> 07/18/91 DRY -- <br /> 09/30/91 DRY - - - - - -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 04/26/93 5082 -3906 60 000 28,000 <250 <250 <250 - <br /> 07/26/93 5l 81 -4005 43,000 19,000 240 <125 <125 -- <br /> 10/20/93 52 35 -4059 21,000 15,000 120 <50 68 <br /> 01/17-18/94 4983 -3807 23,000 13,000 100 <50 75 „ -- <br /> 04/25-26194 4775 -3599 16,000 12,000 92 31 70 -- <br /> 07/25-26194 50 16 -3840 NOT SAMPLED-(CONSTRUCTION) -- -- -- - <br /> 10/26-27194 51 26 -3950 13,000 10,000 790 <20 270 <br /> 01125-26195 4862 -3686 5,000 3,700 27 <05 44 q -- <br /> 04/26-27195 4397 -32 21 2,900 650 12 2 3 16 -- <br /> 07/27/95 4503 -33 27 150 21 24 <1 0 1 9 -- <br /> 10125-26195 4992 -38 16 - - - - - <br /> 01/25/96 43 11 -31 35 86 69 085 <05 084 J <br /> 04/25/96 38 31 -2655 - - <br /> 07/24/96 3868 -2692 <50 <0 5 <0 5 <05 <05 69/696 <br /> 10/23/96 40 53 -2877 SAMPLED SEMI-ANNUALLY - - -- -- <br /> 01/20/97 36 82 -2506 <50 <0 5 <05 <05 <05 25 <br /> 07/16/97 34 32 -2256 <50 <05 <05 <05 <0 5 34 <br /> 10/15/97 36 18 -2442 <50 <05 <0 5 <05 <05 <5 0 <br /> 6981 x1s1138 5. As of99 <br />