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Page 8 of 20 <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 TPH9 Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft MSL) (ft,TOC) .(ft:MSL) Change(ft) _- (ft), (ppb) (ppb) _ (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> ATR-5 2/18/1994 1073 3800 0 38 -- 160 3 5 1 4 .. <br /> (cont) 5/20/1994 1082 3791 -009 600 <0 3 2 1 2 17 - <br /> 10/7/1994 11 14 3769 -0 32 660 <0 5 <0 5 <0 5 <0 5 <br /> 12(16/1994 1077 3796 0 37 410 6 5 <0 5 <0 5 <0 5 - <br /> 2/28/1995 1080 3793 -003 - 60 <0 5 0 6 <0 5 <0 5 <br /> 4/26/1995 1104 37 69 -024 -- 83 <0 5 <0 5 <0 5 <0 5 <br /> 7/27/1995 1127 3746 -023 58 <0 5 <0 5 <0 5 12 -10/2611995 (a) 1051 -- .- -- - -- <br /> 10/27/1995 -- - <520 <5 <0 5 <0 5 <0 5 <br /> 2/12/1996 960 - -- 92 1 <0 5 <0 5 <0 5 -- <br /> 4/18/1996 8 06 -- 154 - 60 <0 5 <0 5 <0 5 <0 5 - - <br /> 7/18/1996 1011 - 205 280 4 8 <0 5 <0 5 <0 5 14 <br /> 11/15/1996 <br /> 3/14/1997 1094 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 015 <br /> 6/4/1997 NP 1026 -- 068 97 2 7 <0 5 <0 5 <0 5 <2 5 017 <br /> 8/11/1997 NP 1044 018 220 3 4 0 6 <0 5 <0 5 6 9 -- <br /> 11/17/1997 NP 1050 -- -006 - 190 2 8 066 <0 5 <0 5 51 -- <br /> 3/30/1998 NP 9 81 -- 069 - 88 <0 5 <0 5 <0 5 <0 5 6 2 2 1 <br /> 6/25/1998 NP 1011 -0 30 <50 <0 5 <0 5 <0 5 <0 5 9 11 1 5 <br /> 9/11/1998 Well inaccessible <br /> 12/15/1998 NP 10 20 - 134 <0 5 <0 5 <0 5 <0 5 6 98 1 7 <br /> 3/17/1999 NP 9 81 - 039 - 756 0 586 <0 5 0 876 102 <5 0 74 <br /> 5/14/1999 NP 1034 - -053 - <50 <0 5 <0 5 <0 5 <0 5 <5 8 5 <br /> 9/16/1999 NP 1040 -- 006 - <50 <0 5 <0 5 <0 5 <0 5 512 2 2 <br /> 12/22/1999 NP 1030 0 10 - <50 <0 5 <0 5 <0 5 <0 5 <2 50 635 <br /> 2/29/2000 NP 970 -- 060 - <50 <0 5 <0 5 <0 5 <0 5 306 2 9 <br /> 6/7/2000 Well inaccessible <br /> 9/25/2000 NP 10 57 - -- -- <50 <0 5 <0 5 <0 5 <0 5 <2 50 040 <br /> 1029/2000 P 1019 - 038 -- 136 128 <0 500 <0 500 0 656 <2 00' 51 <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 17 <0 50 <0 50 067 220' - <br /> 9/12/2001 P 1035 -012 150 <0 50 <0 50 <0 50 <0 50 92 16 <br /> 12/19/2001 Well inaccessible <br /> 3/14/2002 Well inaccessible <br /> 6/28/2002 P 1033 -- - - 67 <0,5 <0 5 <0 5 <0 5 83 4 7 <br /> K V5 BP ARCON020931Quartedl A2 QTR 021Table 1_2_3 As <br />