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• 003 of 21 <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) MtBE DO <br /> Number Sampled (ft,MSL) (ft TOC) (ft MSL) Change(ft) (ft) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (mg/L) <br /> ATR-2 10/19/1990 1181 3741 000 -- <br /> (cant) 1/10/1991 11 58 3764 0 23 <50 0 8 <0 5 <0 5 <06 <br /> 4/10/1991 1136 3787 0 23 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/10/1991 1174 3748 -039 - <50 <0 5 <0 5 <0 5 <0 5 <br /> 9/24/1991 1202 3720 -0 28 <50 <0 5 <0 5 <0 5 <0 S - <br /> 1/23/1992 1160 37 62 0 42 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 4/20/1992 1163 37 59 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/8/1992 1175 3747 -022 <50 2 8 <0 5 <0 5 <0 5 <br /> 10/7/1992 1183 3739 -008 59 5 7 <0 5 <0 5 <0 5 <br /> 1/18/,93 <br /> -- - - - - <br /> 4/14/1993 1129 3793 - 55 3 8 0 7 0 8 19 <br /> 8/30/1993 1196 37 26 -0 67 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/1993 11 95 3727 0 01 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 2/18/1994 1154 3768 041 <10 07 09 <03 07 <br /> 5/20/1994 1161 3761 -007 - <10 0 9 <0 3 <0 3 <0 5 -- <br /> 10/7/1994 11 93 3729 -0 32 <50 <0 6 <0 5 <0 5 <0 5 - - <br /> 12l16/1994 11 56 3766 037 - <50 <0 5 <0 5 <0 5 <0 5 - <br /> 2/28/1995 1160 3762 -004 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 4/25/1995 1195 3727 -035 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/27/1995 1291 3631 0 96 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10/26/1995 1226 36 96 065 -- <50 <0 5 <0 5 <0 6 <0 5 <br /> 2/12/1996 1140 37 82 0 86 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 4/18/1996 1190 3732 -0 50 -- <250 <2 5 <2 5 <2 5 <2 5 - <br /> 7/18/1996 1210 3712 -020 <50 <0 5 <0 5 <0 5 <0 5 500 - <br /> 11/15/1996 1270 36 52 -060 <50 <0 5 <0 5 <0 5 <0 5 750 - <br /> 3/14/1997 P 1270 36 52 000 - <50 <0 5 <0 5 <0 5 <0 5 280 008 <br /> 6/4/1997 NP 1202 37 20 068 - <50 064 <0 5 <0 5 <0 5 480 006 <br /> 8/11/1997 P 1233 3689 0 31 <50 <0 5 <0 5 <0 5 <0 5 440 <br /> 11/17/1997 P 1226 3696 007 <50 <0 5 <0 5 <0 5 <0 5 98 <br /> 3/30/1998 NP 1182 3740 044 - <50 <0 5 <0 5 <0 5 <0 5 18120' 1 2 <br /> 6/25/1998 NP 1205 3717 -023 - <50 <0 5 <0 5 <0 5 <0 5 109 1 6 <br /> 9/11/1998 NP 1212 3710 -007 <50 <0 5 <0 5 <0 5 <0 5 250 167 <br /> 12/15/1998 NP 1201 3721 Oil <60 <0 5 <0 5 <0 5 <0 5 <5 0 15 <br /> 3/17/1999 NP 11 65 3757 0 36 <50 <0 5 <0 5 <0 5 <0 5 <5 0 2 3 <br /> 5/14/1999 NP 1205 3717 040 - <50 <0 5 <0 5 <0 5 <0 5 <5 0 190 <br /> 9/16/1999 NP 1223 3699 -018 - <50 <0 5 <0 5 <0 5 <0 5 <5 0 3 7 <br /> 12/22/1999 NP 1214 3708 009 <60 <0 5 <0 5 <0 5 <0 5 <2 50 7 43 <br /> K%W prooessU5 BP ARCOw2o93+Quarterly%I QTR OW093 aW MR 1 Qos <br />