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i . <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Blvd,Tracy, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (Erg/L) W/L) (pg/L) (pg/L) (pg/L) (pglL) (mg/L) Comments <br /> ATR-5 4114/1993 - 4873 10 47 3826 - - - - -- - - <br /> 4/15/1993 -- 4873 - - 810 -- 15 <05 83 09 - - <br /> 8/31/1993 - 4873 1116 3757 80 - <05 <0 5 <0 5 <0 5 T <br /> 10/27/1993 - 4873 1 11 11 3762 63 -- <05 <0 5 <0 5 <05 <br /> 2/1811994 -- 4873 1073 3800 160 - 3 5 1 4 - - <br /> 5/20/1994 -- 4873 1082 3791 600 -- <03 2 12 1 7 - <br /> 10f7/1994 -- 4873 11 14 3759 660 - <0 5 <05 <0 5 <05 - - <br /> 12/16/1994 -- 4873 1077 3796 410 - 65 <05 <05 <05 - - <br /> 2/28/1995 - 4873 1080 3793 60 -- <0 5 0 6 <0 5 <0 5 - -- <br /> 4/26/1995 - 4873 1104 3769 83 - <0 5 <0 5 <0 5 -<05 - - <br /> 7/27/1995 - 4873 1127 3746 58 - <05 <0 5 <0 5 12 - - <br /> 10/26/1995 -- - 1051 - - - - - - - - (a) <br /> 10/27/1995 - - - - <520 - <5 <05 <0 5 <0 5 - - <br /> 2/12/1996 - - 960 - 92 - 1 <0 5 <0 5 <0 5 - -- <br /> 4/18/1996 - - 806 -- 60 - <0 5 <0 5 <0 5 <0 5 - - <br /> 7/18/1996 - 1011 - 280 - 48 <0 5 <0 5 <0 5 i4 - <br /> 11/15/1996 - -- -- - - - - - -- -- <br /> 3/14/1997 -- -- 10 94 - <50 - <0 5 <0 5 <0 5 <0 5 <2 5 015 <br /> 6/4/1997 NP -- 1026 _ 97 - 27 <0 5 <0 5 <0 5 <25 017 <br /> 8111/1997 NP -- 1044 -- 220 - 34 06 <0 5 <0 5 69 - <br /> 11/17/1997 NP - 1050 - 190 - 2 8 065 <0 5 <0 5 51 -- <br /> 3/30/1998 NP - 981 -- 88 - <05 <0 5 <0 5 <0 5 62 21 <br /> 6/2511998 NP -- 1011 - <50 - <0 5 <0 5 <0 5 <0 5 911 15 <br /> 9/11/1998 - - - - __ _ _ _ _ _ Well inaccessible <br /> 12/1511998 NP -- 1020 134 - <05 <0 5 <0 5 <0 5 898 1 7 <br /> 3117/1999 NP - 981 - 756 - 0 586 <0 5 0 876 1 02 <50 74 <br /> 5/14/1999 NP 1034 -- <50 - <0 5 <05 <0 5 <0 5 <5 85 <br /> 911611999 NP 10 40 <50 - <0 5 <0 5U500O'656 <br /> 512 22 <br /> 12/22/1999 NP - 1030 <50 - <0 5 <0 5 <2 50 635 <br /> 2/29/2000 NP 970 - <50 -- <05 <0 5 306 29 <br /> 6/7/2000 - -- - -- _ - - Well inaccessible <br /> 9/25/2000 NP - 1057 - <50 - <0 5 <0 55 <2 50 0 4 <br /> 12/29/2000 P - 1019 - 136 - 128 <0 500 <2 00' 51 <br /> Report Date January 18,2005 Page 10 of 27 <br />