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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 I Ethyl- Total <br /> Well Date PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (pg/L) (pg/L) (pglL) (pgll-) (pg/L) WIL) (mg/L) Comments <br /> ATR-10 03/31/2003 P 4807 1012 3795 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 15 <br /> 06/09/2003 — 4807 1015 3792 — — — — — <br /> 09/18/2003 P 4807 1060 3747 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 23 <br /> 12/24/2003 -- 4807 1044 3763 — -- — — <br /> 03/12/2004 P 2013 1043 970 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 16 <br /> ATR-11 8/25/1991 -- 4684 -- — <50 <0 5 <0 5 <05 <0 5 -- — <br /> 9/24/1991 4684 950 3734 — — — -_ — <br /> 9/25/1991 -- 4684 -- — <50 — <0 5 <05 <05 <0 5 <br /> 1/23/1992 — 4684 895 3789 <50 — <0 5 <0 5 <0 5 <0 5 <br /> 4/20/1992 - 4684 878 3806 — — -- — — <br /> 4/21/1992 — 4684 — -- <50 — <0 5 <0 5 <05 1 <0 5 — — <br /> 7/8/1992 -- 4684 912 3772 <50 — <0 5 <0 5 <05 <0 5 -- -- <br /> 10/7/1992 -- 4684 930 3754 <50 <05 <0 5 <0 5 <05 — <br /> 1/18/1993 — 4684 780 3904 <50 -- <0 5 <0 5 <05 <0 5 -- -- <br /> 4/14/1993 - 4684 847 3837 <50 -- <0 5 <0 5 <0 5 <0 5 — <br /> 8/31/1993 4684 938 3746 <50 -- <0 5 <0 5 <05 <0 5 — <br /> 10/27/1993 -- 4684 931 37 53 1 <50 — <05 <0 5 <0 5 <0 5 -- — <br /> 2/18/1994 -- 46 84 883 3801 <10 -- 08 1 <0 3 0 6 <br /> 5/20/1994 -- 4684 893 1 3791 <10 <0 3 <0 3 <0 3 <0 5 <br /> 10/7/1994 -- 4694 934 3750 <50 — <0 5 <0 5 <0 5 —<05 - <br /> 12/16/1994 — 4684 891 3793 <50 -- <0 5 <0 5 <0 5 <0 5 -- <br /> 2/28/1995 — 4684 885 3799 <50 - <0 5 <0 5 <0 5 <0 5 -- — <br /> 4/25/1995 - 46 84 911 3773 <50 - <0 5 <0 5 <0 5 <0 5 — - <br /> 7/27/1995 -- 46 84 943 37 41 -- _ _ — — —F7E <br /> 10/26/1995 -- 4684 959 37 25 — -- — __ - <br /> 2/12/1996 — 4684 842 3842 1 <50 <0 5 —<0505 <0 5 <br /> 4/18/1996 — 4684 903 3781 — _- — _ <br /> 7/18/1996 -- 4684 945 3739 <50 <0 5 1 <0 5 <05 <0 5 <5 -- <br /> 11/15/1996 -- 4684 995 3689 -- — -- <br /> 3/14/1997 <br /> _311411997 NP 46 84 986 3698 <50 - <0 5 <05 <0 5 <0 5 — 015 <br /> 6/4/1997 -- 4684 924 3760 -- - -- — -- -- — 008 <br /> 8/11/1997 NP 4684 963 3721 <50 - <0 5 <0 5 <0 5 <05 <2 5 -- <br /> i 1/17/1997 -- 4684 947 3737 <br /> Report Date May 6,2004 Page 20 of 25 <br />