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• Tab 1 Groundwater Monitor ng and Analytical Results Former Tosco(Unocal) ervice Station#6981 4707 Pacific Avenue Stockton,California Wa L ID/ DATE DTW S.I. GW1~ TPII,G 8 T E x MTBE �GC�U ) Url rbgs) {l0 (Pb) fA bl ( ) { bl b} ( bl i MW-1 1 05/27/98 2671 51 0-55 0 -1630 <50 3 5 <0 50 <0 50 <0 50 321306 (cant) 07/21/98 2677 -1636 57 22 098 <0 50 17 34127° 10/14/98 2775 -1734 <50 <0 50 <0 50 <0 50 069 211206 01125-26/99 2704 -16 63 <50 <0 50 <0 50 <0 50 <0 50 621536 I 04/19-20/99 2453 -14 12 <50 <0 50 <0 50 <0 50 <0 50 251246 07/15-16/99 25 81 -1540 <50 <0 50 <0 50 <0 50 <0 50 <2 512 06 1041 10/25-26/99 2740 -1699 <50 <0 50 <0 50 <0 50 076 5 113 86 01/27-28/00 27 10 -1669 <50 <0 50 <0 50 <0 50 <0 50 <2 5/3 06 06126-27/00 2430 -1389 <50 0 <0 500 <0 500 <0 500 <0 500 <5 001<2 006 1107 09122-23/00 2748 -1641 2,000" <5 0 <5 0 <5 0 110 <25/<2 06 12126-27100 2743 -1636 379" <1 00 <1 00 <1 00 <1 00 <10 01<2 06 03107-08/01 2723 -16 16 41316 228 <0 500 <0 500 <0 500 <5 001<2 006 06126-27101 28 16 -1709 15016 053 <0 50 <0 50 <0 50 <5 0/<2 06 09112-13/01 3004 -1897 31016 34 <0 50 <0 50 <0 50 <5 0/<2 06 12/12-13/01 3037 -1930 24036 13 <0 50 <0 50 <0 50 <5 0/<1 06 03/20-21102 29 18 -18 11 16016 24 <0 50 <0 50 <0 50 <5 0/<2 06 06/06-07/02" 2959 -1852 <50 <0 50 079 <0 50 <1 0 --K2 06 09/30/0218 3207 -21 00 <50 1 1 1 8 1 2 42 <2 0 12/30-31/02$ 31 65 -2058 <50 <0 50 056 <0 50 13 <2 0 03/29-30/03`$ 3072 -1965 <50 <0 50 <0 50 <0 50 <1 0 <2 0 06/25-26103" 3098 -1991 <50 <0 50 <0 50 <0 50 <1 0 <2 0 MW-2 02/21/90 -- 51 0-55 0 -- 12,000 1,900 75 21 140 -- 10/18/90 DRY -- -- -- -- __ -- -_ 11/19/90 DRY 12/27/90 DRY 01/28/91 DRY 04/02/91 DRY 07/18/91 DRY 09/30/91 DRY I1/14/91 DRY 04/16/92 DRY -- -- -- .- -- -. -- 6981 xls/#180138 2 As of 06/26/03