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• s • <br /> Page 12 of 20 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,Tracy,CA <br /> Well Depth Groundwater Groundwater Product Ethyl- Xylenes <br /> Well Date Elevation to Water Elevation Elevation Thickness TPH9 Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft MSL) (ft,TOC) (ft,MSL) Change(ft) (ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> 6/25/2002 P 1248 3717 -006 <50 <0 5 <0 5 <0 5 <0 5 0 97 3 6 <br /> ATR 8 8/25/1991 45 98 -- -- -- 2,700 110 <0 5 130 98 - <br /> 9/25/1991 885 3713 -- 1,400 95 <0 5 51 97 -- <br /> 1/23/1992 829 3769 066 <50 2 5 <0 5 <0 5 <0 5 - <br /> 4/20/1992 811 3787 0 18 - -- -- - <br /> 4/21/1992 -- -- 140 14 0 9 14 9 3 <br /> 7/8/1992 848 3750 - 87 4 0 <0 5 9 2 0 8 <br /> 10/7/1992 869 3729 -0 21 -- -- -- -- -- <br /> 10/8/1992 -- -- -- -- 140 7 8 3 2 11 8 8 <br /> 1/18/1993 709 3889 <br /> 1/19/1993 -- -- -- 980 140 17 11 34 - -- <br /> 4/14/1993 780 3818 -- - -- -- -- <br /> 4/15/1993 -- - 110 42 <0 5 4 6 4 9 <br /> 8/31/1993 9 81 3617 - - 700 ISO 15 41 71 <br /> 10/27/1993 868 3730 1 13 -- 52,000 620 2,100 2,800 8,700 -- - <br /> 2/17/94A 825 3784 064 0 14 - - - <br /> 5/20/94A 8 55 3754 0 30 014 - -- -- .- -- <br /> 1017/94A 870 3739 -0 15 014 -- -- -- <br /> 17/16/1994 8 21 3777 0 38 sheen <br /> 2128/96A 845 3755 -022 002 -- - -- <br /> 4/26/95A 851 3786 0 31 0 50 -- -- -- .. <br /> 7/27/95A 985 36 22 -163 012 -- -- - <br /> 10/26195A 928 3672 050 003 -- -- -- <br /> 2/12/96A 7 87 3813 140 002 - -- - -- .. <br /> 41181W 845 3755 -058 002 - - -- - - -- <br /> 7/18/1996 895 3703 -052 88,000 72 220 620 2,500 <500 <br /> 11/15/1996 940 3658 -045 52,000 110 130 240 1,300 <200 -- <br /> 3/14/1997 924 3674 016 350 4 2 <0 5 1 6 26 <2 5 010 <br /> 6/4/1997 NP 869 3729 0 55 -- 1,200 42 5 2 8 2 150 <25 0 03 <br /> 8/11/1997 NP 9 10 3688 -0 41 7,800 280 75 140 710 <25 -- <br /> 11/17/1997 NP -- - - - 4,200 57 <0 5 <0 5 250 <2 5 - <br /> 3/30/1998 NP 8 02 3796 - 320 1 7 <0 5 <0 5 2 4 <5 0/<2 0' 080 <br /> 6/25/1998 NP 969 3629 167 -- 876 300 190 871 176 <5 0 140 <br /> 9/11/1998 Well paved over <br /> 12/15(1998 NP 4611 886 3725 - 456 102 0 690 612 609 <5 0 070 <br /> 3/17/1999 NP 865 3756 -0 31 - 130 2 12 0 528 212 2 71 <5 0 250 <br /> K V5 8P ARM020931QuartertN QTR 027able 1_2^3)ds <br />