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• i • <br /> Page 16 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 TPHg Benzene Toluene benzene (total) ME 00 <br /> Number Sampled (ft MSL) (ft,TOC) (ft MSL) Change(ft) (ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> ATR 10 6/20/2001 1081 3726 059 - -- - <br /> (cont) 9/12/2001 Well inaccessible <br /> 12/19/2001 Well inaccessible <br /> 3/14/2002 Well inaccessible <br /> 6/28/2002 — — -- •• — -- — -- — -- -- <br /> ATR 11 8/25/1991 46 84 -- -- - <50 <0 5 <0 5 <0 5 <0 5 - <br /> 9/24/1991 950 37 34 -- -- -- -- -- <br /> 9/25/1991 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 1/23/1992 895 3769 -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 4/20/1992 878 3806 0 17 -- - -- -- -- -- <br /> 4/21/1992 - -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/8/1992 912 3772 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/7/1992 930 3754 -0 18 -- <50 <0 5 <05 <0 5 <0 5 -- <br /> 1/18/1993 7 80 3904 150 -- <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> 4/14/1993 847 3837 -0 67 •- <50 <0 5 <0 5 <0 5 <0 5 - -- <br /> 8/31/1993 938 3746 -091 -- <50 <0 5 <0 5 <0 5 <0 5 - - <br /> 10/27/1993 9 31 3753 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/18/1994 8 83 38 01 048 <10 0 8 1 <0 3 0 6 -- <br /> 5/20/1994 893 3791 -010 <10 <0 3 <0 3 <0 3 <0 5 <br /> 10/7/1994 934 37 50 -0 41 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/1994 891 3793 043 <50 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 2/28/1995 885 37 99 006 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/25/1995 911 3773 -026 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/27/1995 9 43 3741 -0 32 - -- -- - -- -- <br /> 10/26/1995 959 3725 -016 -- -- - - <br /> 2/t 2/1996 842 3842 1 17 <50 <0 5 <0 5 <0 5 <0 5 <br /> 411811996 903 3781 -0 61 - - -- -- -- <br /> 7/18/1996 <br /> - <br /> 7/18/1996 945 3739 042 - <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 11/15/1996 995 3689 -0 50 -- -- -- -- <br /> 3/14/1997 NP 986 3698 009 - <50 <0 5 <0 5 <0 5 <0 5 015 <br /> 6/4/1997 924 3760 0 62 - -- - -- -- 008 <br /> 8/11/1997 NP 963 3721 -039 - <50 <0 5 <0 5 <0 5 <0 5 <2 5 <br /> 11/17/1997 947 3737 016 - -- -- -- - -- -- -- <br /> 3/30/1998 NP 866 38 18 0 81 - <50 <0 5 <0 5 <0 5 <0 5 <5 0 15 <br /> 6/25/1998 9 92 36 92 -126 -- -- -- -- -- <br /> 9/11/1998 P 940 37 44 052 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 161 <br /> K U5 8P AR=0209310uartertyl2 QTR MkTaWe 1_2_3 rda <br />