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*11 of 16 <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 Dale Elevation to Water Elevation Elevation Thicknass TPHg Benzene Toluene benzene (total) MtEIE DO <br /> Number Sampled (It MSL} (ft TOC) (ft MSL) Change(ft) (1t) (ppb) (ppb) (ppb) (ppb) (ppb) ppb) (mg/L <br /> ATR 9 10!2711993 11 23 3746 0 06 <50 <0 5 <0 5 <0 5 0 7 <br /> (cont) 2/17/1994 1089 3779 0 34 <br /> 2/18/1994 -- <10 <0 3 0 4 <0 3 <br /> 5120/1994 1097 3771 <10 <0 3 <0 3 <0 3 <0 5 <br /> 108/1994 11 19 3749 022 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12116/1994 10 91 3777 028 <50 <0 5 <0 5 <0 5 <0 5 _ <br /> 2/28/1995 1093 .3775 0 02 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/25/1995 11 46 3722 0 53 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7127!1995 11 73 3695 -027 <br /> 10/26/1995 11 80 36 88 007 <60 <0 5 <0 5 <0 5 <0 5 <br /> 2112/1996 1090 3778 090 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/18/1996 11 30 3738 040 _ _- <br /> 7/18/1996 11 68 37 00 0 38 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 11!15/1996 1223 3645 0 55 _ <br /> 3/1411997 NP 1223 3645 000 <50 <0$ <0 5 <0 5 <0 5 0 20 <br /> 6/4/1997 11 52 37 16 0 71 — 0 40 <br /> 8/11/1997 NP 11 86 36 82 034 <50 <0 5 <0 5 <0 5 <0 5 <2 5 <br /> 11/17/1997 11 72 3696 014 _ <br /> 3130/1998 NP 11 10 3758 0 62 <50 <0 5 <0 5 <0 5 <0 5 <5 01<2 0' 240 <br /> 6125!1998 11 51 3717 0 41 — — _ <br /> 9/111199B NP 11 65 37 03 014 <50 <0 5 <0 5 <0 5 <0 5 <2 5 1 Bt <br /> 12/15/1998 11 53 3715 012 170 <br /> 3/17/1999 NP 11 25 37 43 028 <50 <0 5 <0 5 <0 5 <0 5 <50 1 60 <br /> 5/14/1999 NP 11 50 3718 025 — — 140 <br /> 9/1611999 NP 11 74 3694 024 <50 <0 5 <0 5 <0 5 <0 5 <50 4 30 <br /> 12122/1999 NP 11 61 3707 013 1 99 <br /> 2 12 912 0 0 0 NP 11 04 37 64 057 — <60 <0 5 <0 5 <0 5 <0 5 <2 5 4 30 <br /> 6/7/2000 Well Inaccessible <br /> 9/25/2000 Well Inaccessible <br /> 12/21/2000 Well Inaccessible <br /> 3/27/2001 P 11 40 3728 036 <50 0 <0 500 <0 500 <0 500 <0 500 <2 00' 3 2 <br /> 6/20/2001 11 47 3721 -007 <br /> 9/1212001 P 11 50 3718 0 03 <50 <0 50 <0 50 <0 50 <0 50 19 14 <br /> 12119/2001 11 40 3728 010 _ <br /> 3/1412002 P 11 51 3717 Oil <50 <0 5 <0 5 <0 5 <0 5 <0 50' 0 63 <br /> 6/28/2002 _ <br /> 9!1112002 P 11 41 37 27 — — <50 <0 5 <0 5 <0 5 <0 5 <0 5' 1 5 <br /> ATR 10 10/16/1990 4807 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/19/1990 1020 37 87 _ <br /> 1/10/1991 1007 3800 013 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/10/1991 1000 3807 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/12/1991 1021 37 86 0 21 <50 <0 5 <0 5 <0 5 <0 5 _ <br /> 9124/1991 1032 3775 Oil _ <br /> 9/25/1991 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 1/23/1992 1000 3907 - <50 <0 5 <0 5 <0 5 <0 5 — <br /> 4120/1992 1001 38 06 0 01 <br /> 4/2111992 — <50 <0 5 <0 5 <0 5 <0 5 <br /> K V6 8P AAC0%020931QuuturlR3 QTn 02%TaN.1_2_3 Ida <br />