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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) (ug/L) (pg/L) (jrg1L) (pglL) (pg1L) (pg1L) (pg1L) (mg/L) Comments <br /> ATR-10 3/30/1998 NP 48 07 10 05 38 02 <50 - <0 5 <0 5 <0 5 <0 5 <5 0 2 3 <br /> 6/25/1998 4807 1025 3782 - N -- - <br /> 9/11/1998 NP148 <br /> 07 10 35 37 72 <50 <0 5 <p 5 <0 5 <0 5 <25 143 <br /> 12/15/1998 - 07 1021 3786 -- - - -- - - -- 0 6 <br /> 3/17/1999 NP07 1011 3796 <50 - <0 5 <05 <0 5 <0 5 <5 0 1 3 <br /> 5/14/1999 -- 07 10 31 37 76 - -- -� - -- - -- 17 <br /> 9/16/1999 NP 4807 1044 3763 <50 -- <0 5 <0 5 <0 5 <0 5 <50 39 <br /> 12/22/1999 -- 4807 1035 3772 -- -- - - -- - 1 54 <br /> 2/29/2000 NP 4807 1003 3804 <50 - <0 5 <0 5 <0 5 <0 5 <25 51 <br /> 6612000 NP 4807 1035 3772 - - -- _ - <br /> 9/25/2000 NP 4807 1045 3762 <50 - <0 5 <05 <0 5 <0 5 <2 5 0 6 <br /> 12/21/2000 -- 4807 1030 3777 -- - -- -- -- -- -- 71 <br /> 3/27/2001 P 48 07 10 22 37 85 <50 0 - <0 500 <0 500 <0 500 <0 500 <2 00" 23 <br /> 6/20/2001 - 48 07 10 81 3726 -- -- - - -' -" - <br /> 9/12/2001 -- 48 07 -- - - -- - - - - -- - Well inaccessible <br /> 12/1912001 - -4807 <br /> -- - - -- -- -- - - -- Wellinaccessible <br /> 3114!2002 -- 4807 - - - - - -- -- -- - - Well inaccessible <br /> 6/28/2002 - 4807 - - -- - - -- - - <br /> 9/11/2002 - 4807 - - - - - - _ -- - Well inaccessible <br /> 12117x2002 - 48 07 - -- - - -- - _ - <br /> 03/31/2003 P 4807 1012 3795 <50 - <0 50 <0 50 <050 <0 50 <0 50* 1 5 <br /> 06/09/2003 - 1 4807 1015 3792 -- - -- -- - - - <br /> 09118l2003 P 4807 1060 3747 <50 - <0 50 <0 50 <0 50 <0 50 <0 50* 2 3 <br /> 12/24/2003 -- 4807 1044 3763 - - - -- -- - - -' <br /> 0311712004 P 2013 10 43 9 70 <50 - <0 50 <0 50 <0 50 <0 50 <0 50* 1 6 <br /> 06/01/2004 - 2013 1057 9 56 -- - -- - - - Not Sampled <br /> 09/2012004 -- 2013 1053 960 -- - -- - -- -- -- Not Sampled <br /> ATR-11 8125/1991 -- 46 <50 - <0 5 <05 <D 5 <0 5 -- -- <br /> 9/24/1991 - 4684 950 3734 -- - - - -- - - -' <br /> 9/25/1991 - 4684 -- -- <50 -- <0 5 <0 5 <0 5 <0 5 - <br /> 1/23/1992 -- 4684 895 3789 <50 - <0 5 <05 <0 5 <0 5 -- -- <br /> 4/20/1992 -- 46 84 878 3806 -- - -- - - <br /> 4/21/1992 - 46 84 - - <50 - <05 1 <0 5 <0 5 1 <0 5 - - <br /> Report Date October 14,2004 <br /> Page 20 of 27 � <br />