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Page 7 of 17 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Boulevard,Tracy,CA <br /> j Weil Depth Groundwater Groundwater Product Ethyl Xylenes <br /> Well Date Elevation to Water Elevation Elevation TNckness TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled tt MSL) (ft TOC) (ft,MSL) Change(It) (tt) (ug/L) (u2/L) (u IL) (uglL) (ug1L) (ug/L) (mg'L) <br /> ATR 5 3/14/1997 10 94 <50 <0 5 <0 5 <0 5 <0 5 <2 5 015 <br /> (cont) 6/4/1997 NP 1026 0 68 97 2 7 <0 5 <0 5 <0 5 <2 5 017 <br /> 811111997 NP 1044 018 _ 220 3 4 0 6 <05 <0 5 6 9 <br /> 11/17/1997 NP 10 50 0 06 190 2 8 065 <05 <0 5 51 - <br /> 3/30/1998 NP 9 61 069 88 <0 5 <0 5 <0 5 <0 5 6 2 21 <br /> 6/25/1998 NP 1011 030 <50 <0 5 <0 5 <0 5 <0 5 911 1 5 <br /> 9/11/1998 Well inaccessible <br /> 12/1511998 NP 1020 134 <0 5 <0 5 <0 5 <0 5 8 98 1 7 <br /> 3/17/1999 NP 9 81 0 39 — 75 6 0 586 <05 0 876 1 02 <50 7 4 <br /> 5/14/1999 NP 1034 0 53 — <50 <05 <0 5 <0 5 <05 <5 8 5 <br /> 9/16/1999 NP 1040 006 <50 <0 5 <0 5 <0 5 <05 512 2 2 <br /> 12J22/1999 NP 1030 010 <50 <05 <0 5 <0 5 <0 5 <2 50 635 <br /> 2129/2000 NP 970 060 <50 <05 <0 5 <05 <0 5 3 06 2 9 <br /> 6/7/2000 Well inaccessible <br /> 9/25/2000 NP 1057 — <50 <0 5 <0 5 <0 5 <0 5 <2 50 040 <br /> 12/29/2000 P 1019 0 38 136 1 28 <0 500 <0 500 0 656 <2 00 5 1 <br /> 3/27/2001 P 1004 — 015 808 <0 500 <0 500 <0 500 0 537 18 0 3 5 <br /> 6/20/2001 P 1023 019 » 150 1 7 <0 50 <0 50 067 220 <br /> 9/12/2001 P 1035 012 150 <0 50 <0 50 <0 50 <0 50 92 1 6 <br /> 12119/2001 Well inaccessible <br /> 3/14/2002 Well inaccessible <br /> 6/28/2002 P 1038 — 67 <0 5 <0 5 <0 5 <0 5 83 4 7 <br /> 9/11/2002 P 1024 38 49 014 <50 <0 5 <05 <0 5 0 76 19 3 7 <br /> 1211712002 Well inaccessible <br /> 3/31/2003 P 1011 38 62 — <50 <0 50 <0 50 <0 50 <0 50 It 3 9 <br /> 6/9/2003 P 1016 3857 -0 05 — <50 <0 50 <0 50 <0 50 <0 50 31 4 9 <br /> ATR 6 3/10/1989 49 35 — -- — <200 <0 5 <0 5 <0 5 <0 5 — <br /> 6/21/1989 11 54 3781 — <50 <0 3 <0 3 <0 3 0 3 - <br /> 9/16/1989 11 60 37 75 006 <50 0 5 1 3 0 3 3 8 <br /> 12/27/1989 11 57 37 78 003 <50 <03 <0 3 <0 3 0 4 » <br /> 4/18/1990 11 68 $7 67 Oil <50 19 2 4 0 6 5 0 <br /> 10/16/1990 -- — -- <50 <05 <0 5 <0 5 <05 <br /> 10/19/1990 11 80 3755 <br /> 1/10/1991 11 64 37 71 016 <50 <0 5 <0 5 <0 5 <05 <br /> 4/10/1991 11 52 3783 012 — <50 <0 5 <0 5 <05 <05 <br /> 7/10/1991 11 76 3759 024 — <50 <0 5 <0 5 <05 <0 5 — <br /> 9/24/1991 11 95 3740 019 <50 <05 <0 5 <0 5 <05 <br /> 1123/1992 11 66 3769 029 -- <50 <05 <0 5 <0 5 <05 — <br /> 4/20/1992 11 56 3779 010 -- -- <br /> 4/21/1992 <50 <0 5 <0 5 <0 5 <05 — <br /> 7/8/1992 11 72 3763 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/7/1992 11 82 3753 -010 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 1/18/1%3 1104 38 31 078 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/14/1993 1142 37 93 038 310 75 <0 5 <0 5 <0 5 <br /> 8/31/1993 — — -- -- -- <br /> 10/27/1993 11 84 3751 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/1711994 — — — » <br /> K Mprmm"8P ARCM02M0\I'wWfVk2 QTR O[+=j ow►+R 2003 <br /> I <br />