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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) (pg1L) (pg/L) (pg1L) (pg1L) (pg/L) (pg/L) (pg/L) (mglL) Comments <br /> ATR-10 06/01/2004 -- 20 13 1057 956 -- — — — — Not Sampled <br /> 09/20/2004 -- 2013 1053 960 1 — -- — - -- — — — Not Sampled <br /> 12/13/2004 -- 2013 1043 1 970 jj -- -- -- -- -- -- Nat Sampled <br /> ATR-11 8/25/1991 — 4684 — — <50 — <0 5 <05 <0 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 <0 5 <0 5 <0 5 -- — <br /> 4/20/1992 — 4684 878 3806 <br /> 4/21/1992 — 4684 — -- <50 — <05 <0 5 <0 5 <0 5 - -- <br /> 7/8/1992 — 4684 912 37 72 <50 — <0 5 <0 5 <05 <0 5 -- <br /> 10/7/1992 46 84 9 30 37 54 <50 -- <0 5 <0 5 <0 5 <0 5 <br /> 1/18/1993 4684 780 39 04 <50 -- <0 5 <0 5 <0 5 <0 5 -- — <br /> 4/14/1993 — 46 84 847 3837 <50 -- <0 5 <0 5 <0 5 <0 5 -- <br /> 8/31/1993 4684 938 37 46 <50 — <0 5 <05 <0 5 <0 5 _ <br /> 10/27/1993 -- 4684 931 3753 <50 -- <05 <0 5 <0 5 <0 5 - — <br /> 2/18/1994 — 4684 883 3801 <10 — 08 1 <0 3 0 6 — -- <br /> 5/20/1994 - k6 84 893 3791 <10 <0 3 <0 3 <0 3 <0 5 -- <br /> 10/7/1994 — 4684 934 3750 <50 <0 5 <0 5 <0 5 <0 5 -- <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 <05 <0 5 <0 5 -- <br /> 4/25/1995 -- 4684 911 3773 <50 - <0 5 <0 5 <0 5 <0 5 - <br /> 7/2711995 4684 943 3741 -- <br /> 10/26/1995 - 4684 959 3725 -- _ — -_ <br /> 2/12/1996 4684 842 3842 <50 — <05 <0 5 <0 5 <0 5 — — <br /> 4/18/1996 4684 903 3781 — -- — -- <br /> 7118/1996 - 46 84 9 45 3739 <50 <05 <0 5 <0 5 <0 5 <5 — <br /> 11/15/1996 4684 995 3689 <br /> 3/14/1997 NP 4684 986 36 98 <50 <05 <0 5 <05 <0 5 -- 0 15 <br /> 6/4/1997 -- 4684 924 37 60 -- -- — -- 008 <br /> 8/11/1997 NP 4684 963 3721 <50 — <0 5 <0 5 <0 5 <0 5 <2 5 <br /> 11/17/1997 -- 4684 947 3737 — — — <br /> 3/30/1998 NP 4684 866 3818 <50 — <0 5 <0 5 <0 5 <0 5 <50 1 5 <br /> 6/25/1998 -- 4684 992 3692 -- -- -- <br /> Report Date January 18, 2005 Page 21 of 27 <br />