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i Table 1 Groundwater Monitoring Data and Analytical Results i Former Tosco(Unocal)Service Station#6981 4707 Pacific Avenue Stockton,California 1 i WELL ld! DATE DTW sl GWE TPH-C B T E X MTBE b s) CIS) b) ( b) b) ( b) C b) ( b) VW-3 06/Ob-0710217 3003 25 5-50 5 -18 71 <50 <0 50 <0 50 <0 50 09/30/0218 32 55 -21 23 <50 <0 50 <0 50 <0 50 <1 0 _ (cont) <0 50 <0 50 <1 01 <2 0 12130-3110215 32 11 -2079 <50 <0 50 <0 50 <0 50 <0 50 <1 0 <2 0 03/29-3010315 -1985 31 17 <50 <0 50 <0 SO <0 50 <1 0 <2 0 06125-26/03'" 3144 -2012 <50 VW-4 1 NA 07/24/96 DRY 25 5-50 5 10/23/96 -- -- SAMPLED SEMI-ANNUALLY 01/21/97 3607 -- 3,000 <0 5 53 31 530 <5 0 07/17/97 34 13 670 <0 5 45 61 98i 5 1 10/15/97 DRY -- - -� -- 12/08/97 WELL CONNECTED TO VES -- - -- -' 03/05/98 31 82 -- <50 <0 50 <0 50 <0 50 <0 50 351396 05/27/98 2855 - 3,900 <10 <10 <10 <10 <101<5 06 07/21/98 2853 -- 2,500 0 9 7 <0 50 <0 50 5711 <5 01<2 06 10/14/98 2954 -- 14,0009 <50 <50 120 370 <2501<666 01125-26199 2874 _ -- 20,00012 <50 100 <50 440 <250/156 04119-20199 2623 -- 14,000 <50 <50 82 170 <250/156 07115-16/99 2754 -- 17,000 <50 <50 <50 <50 <250/196 10125-26199 2936 -- 22,00013 <50 <50 70 290 <250/276 01/27-28/00 2885 -- 19,00013 66 <50 190 1,300 4315 16 06126-27100 2609 -- 3,47014 <5 00 <5 00 <5 00 43 2 68311,1106 11 70 09122-23100 2865 -1689 12,00013 <100 <100 <100 200 yh 2,80011606 12126-27/00 2859 -1682 11,10014 <125 - <125 275 167 140/1726 03107-08101 2827 -1651 12,70014 128 <100 794 413 350/3216 06126-27101 2932 -1756 17,00014 <20 <20 27 170 230/3306 09/12-13101 31 20 -1944 6,90014 88 <5 0 62 230 240/3106 12112-13101 31 47 -1971 7,00014 24 <10 200 64 220/2706 3 03120-21102 3021 -1845 17014 <0 50 <0 50 <0 50 24 27/366 06106-07102" 3067 -1891 <50 <0 50 <0 50 050 39 --1406 09/30/02 DRY -- -- -- -- -- --i i 6981 xlcYe 38 As 126/03