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Page 7 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 TPHg Benzene Toluene benzene (total) ME DO <br /> Number Sampled (ft MSL) (ft,TOC) (fl,MSL) Change(ft) (ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> ATR-4 5/14/1999 NP 1097 044 <50 0 591 <0 5 <0 5 <0 5 8,720 2 0 <br /> (cont) 9/16/1999 NP 1093 -- 004 <50 <0 5 <0 5 <0 5 <0 5 <5 0 6 8 <br /> 12/22/1999 NP 1089 •- 004 <50 <0 5 <0 5 <0 5 <0 5 857 1 58 <br /> 2/29/2000 NP 1026 063 - <50 <0 5 <0 5 <0 5 <0 5 <2 5 3 1 <br /> 6/7/2000 NP 1106 - 080 -- <50 <0 5 <0 5 <0 5 <0 5 842 <br /> 9/25/2000 NP 1124 -0 18 -- <50 <0 5 <0 5 <0 5 <0 5 280 070 <br /> 12/29/2000 P 1081 043 - <50 0 <0 500 <0 500 <0 500 <0 500 636" 4 5 <br /> 3/27/2001 P 1064 - 0 17 - <50 0 <0 500 <0 500 <0 500 <0 500 <2 00" 31 <br /> 6/20/2001 P 1084 -- -020 <50 <0 50 <0 50 <0 50 <0 50 <2 0' -- <br /> 9/12/2001 P 1094 -- 010 <50 <0 50 <0 50 <0 50 <0 50 <2 5 2 4 <br /> 1 211 912 0 0 1 P 1078 - 0 16 <50 <0 50 <0 50 <0 50 <0 50 <2 0" 159 <br /> 3/14/2002 P 1078 000 <50 <0 50 <0 50 <0 50 <0 50 710' 129 <br /> 6/28/2002 P 1078 - 000 -- <50 <0 5 <0 5 <0 5 <0 5 <0 5 3 5 <br /> ATR-5 3/10/1989 4873 -- -- -- 6,600 693 <5 0 327 7 -- -- <br /> 6/29/1989 1052 3821 - -- 2,200 490 2 4 280 13 <br /> 9/18/1989 1098 3775 -046 - 1,000 68 1 1 63 5 8 <br /> 12/27/1989 1076 3797 022 - 2,200 94 2 150 <1 - <br /> 4/18/1990 1090 3783 014 - 1,900 120 2 6 6 8 140 <br /> 10/16/1990 -- -- -- 1 000 18 4 7 79 16 <br /> 10/19/1990 11 10 3763 -- - -- -- .- <br /> 1/10/1991 1084 3789 0 26 -- 350 71 12 16 2 6 4/10/1991 1067 3806 017 370 4 6 <0 5 7 <0 5 - -- <br /> 7/10/1991 1102 3771 -0 35 1,200 9 5 <0 5 18 1 5 <br /> 9/24/1991 1129 3744 -027 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 1/23/1992 1078 3795 0 51 -- 180 14 1 5 15 <0 5 <br /> 4/20/1992 1070 3803 008 -- -- -- -- -- -- - <br /> 4/21/1992 -- -- -- -- 290 1 6 <0 5 2 <0 5 -- - <br /> 7/13J1992 1097 3776 -- -- 240 <0 5 <0 5 0 6 <0 5 - - <br /> 10/7/1992 11 11 3762 -0 14 -- -- - -- -- .- <br /> 10/8/1992 -- - 160 <0 5 <0 5 <0 5 <0 5 -- <br /> 1/18/1993 9 94 3879 - - -- <br /> 1/19/1993 -- - 1,000 2 5 <0 5 7 9 1 3 - <br /> 4/14/1993 1047 3826 - - -- -- .. <br /> 4/15/1993 -- -- 810 16 <0 5 8 3 0 9 -- <br /> 8/31/1993 11 16 37 57 -- -- 80 <0 5 <0 5 <0 5 <0 5 -- - <br /> 10127(1993 11 11 3762 005 -- 63 <0 5 <0 5 <0 5 <0 5 -- <br /> K V5 BP ARC0\02093\QuarteAy\2 QTR 021Table 1_2_3)ds <br />