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• • Pa e15of21 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Seance 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 9 12/15/1998 11 53 3715 0 12 -- -- -- - 1 70 <br /> (cant) 3/17/1999 NP 1125 3743 028 <50 <05 <0 5 <0 5 <0 5 <5 0 160 <br /> 5/14/1999 NP 11 50 3718 -026 -- -- - -- 240 <br /> 9/16/1999 NP 1174 3694 024 <50 <0 5 <0 5 <0 5 <0 5 <5 0 430 <br /> i 12/22/1999 NP 1161 3707 013 -- -- - <br /> - -- -- -- 199 <br /> 7/29/2000 NP 1104 3764 057 <50 <0 5 <0 5 <0 5 <0 5 <2 5 430 <br /> 6/7/2000 Well inaccessible <br /> 9/25/2000 Well inaccessible <br /> 12/21/2000 Well inaccessible <br /> 3/27/2001 P 1140 3728 -0 36 -' <50 0 <0 500 <0 500 <0 500 <0 500 <2 00* 3 2 <br /> 6/20/2001 1147 3721 -007 <br /> 9/12/2001 P 11 50 3718 -003 <50 <0 50 <0 50 <0 50 <0 50 19 1 4 <br /> 12/19/2001 1140 3728 010 -- -- - -- - - - <br /> 3/14/2002 P 1151 3717 -011 - <50 <0 5 <0 5 <0 5 <0 5 <0 50* 0 83 <br /> 6/28/2002 - - .- - -- -- <br /> 9/11/2002 P 1141 3727 <50 <0 5 <0 5 <0 5 <0 5 <0 5* 1 5 <br /> 12/17/2002 -- -- - -- - <br /> 313112003' P 1133 3730 — <50 <0 5 <0 5 <0 5 <0 5 <0 5 1 1 <br /> ATR-10 10/16/1990 4807 -- -- -- - <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10/19/1990 1020 37 87 -- - -- -- -- -- <br /> 1/1011991 <br /> - <br /> 1/1011991 1007 3800 013 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/10/1991 1000 38 07 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/12/1991 1021 3786 -021 - <50 <0 5 <0 5 <0 5 <0 5 - - <br /> 9/24/1991 1032 3776 -011 - -- - -- - - <br /> 9/25/1991 -- - - <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 1/23/1992 10 00 3807 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/20/1992 1001 3806 -001 -- -- -- -- -- -- -- <br /> 4/21/1992 - -- - - <50 <06 <0 5 <0 5 <0 5 - -- <br /> 7/8/1992 10 17 3790 - <50 <05 <0 5 <0 5 <0 5 <br /> 10/7/1992 1023 3784 -006 <50 <0 5 <0 5 <0 5 <0 5 <br /> 1/18/1993 9 61 3846 0 62 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/14/1993 994 3813 -033 <50 <0 5 <0 5 <0 5 <0 5 <br /> 8/30/1993 1023 3784 -029 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/1993 1024 3783 -001 - <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/18/1994 1002 3806 022 <10 <0 3 0 4 <0 3 <0 5 <br /> 5/20/1994 1009 3798 -007 - <10 <0 3 <0 3 <0 3 <0 5 -- <br /> 1 <br /> K 1WprccessUA SP ARC01020931Qusrter1y\1 OTR 0312093 GWMR1000 <br />