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• Pa e14of21 <br /> Table 1 <br /> Groundwater Elevation and Analytleal Data <br /> ARCO Service Station 42093 <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) MtBE DO <br /> Number Sampled (ft MSL) (ft TOC) (ft,MSL) Change(ft) (ft) kyl-) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (mg1L) <br /> ATR 9 10/16/1990 4868 -- - <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10/19/1990 11 11 3757 - - -- -- - -- -- <br /> 1/10/1991 1104 37 64 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> i <br /> 4/10/1991 1082 3786 022 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 7/10/1991 1106 3762 024 -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 9/24/1991 1129 3739 -023 -- -- -- - -- <br /> 9/25/1991 -- - <50 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 1/23/1992 1096 3772 -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 4l20/1992 1088 3780 008 -- -- - -- <br /> 4121/1992 - -- -- - <50 <0 5 <0 5 <0 5 <0 5 - - <br /> 7/8/1992 1106 37 62 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/7/1992 11 16 37 52 -010 - <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 1/18/1993 1034 3834 0 82 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/14/1993 1070 37 98 -0 36 - <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 8/30/1993 11 17 3751 -047 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/1993 1123 3745 -006 <50 <0 5 <0 5 <0 5 0 7 - <br /> 2/17/1994 1089 3779 0 34 - - -- -- - -- <br /> 2/18/1994 -- -- -- <10 <0 3 0 4 <0 3 <0 5 <br /> 5/20/1994 1097 3771 <10 <0 3 <0 3 <0 3 <0 5 <br /> 10/7/1994 11 19 3749 022 -- <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 12/16/1994 1091 3777 028 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 2/28/1995 10 93 3775 002 - <50 <0 5 <0 5 <0 5 <0 5 - <br /> 4/25/1995 11 46 3722 053 -- <50 <0 5 <0 5 <0 5 <0 5 - -- <br /> 7/27/1995 1173 36 95 -027 -- -- -- - -- <br /> 10/26/1995 1180 3688 -007 - <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/12/1996 1090 3778 090 - <50 <0 5 <0 5 <0 5 <0 5 - - <br /> 4/18/1996 1130 3738 -040 -- -- -- -- -- -- <br /> 7/18/1996 1168 3700 -038 - <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 11/15/1996 1223 3645 -055 - -- -- -- -- -- - <br /> 3/14/1997 NP 1223 3645 000 <50 <0 5 <0 5 <0 5 <0 5 020 <br /> 6/4/1997 1152 3716 0 71 - -- -- - -- 040 <br /> 8/11/1997 NP 1186 36 82 -034 <50 <0 5 <0 5 <0 5 <0 5 <2 5 -- <br /> 11/17/1997 1172 3696 0 14 - -- -- -- -- -- -- <br /> 3/30/1998 NP 11 10 3758 062 <50 <0 5 <0 5 <0 5 <0 5 <5 0/<2 0" 240 <br /> 6/2511998 '1151 3717 -0 41 -- -- -- -- -- <br /> 9/11/1998 NP 1165 3703 -014 -- <50 <0 5 <0 5 <0 5 <0 5 <25 1 84 <br /> M MpracewU5 6P ARC01020931Quarteriyll QTR p312093 OW MR1003 <br />