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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 NItBE DO <br /> Number Sampled NP (feet msq (feet bgs) (feet msl) (ug1L) (pg/L) (ugIL) WIL) (pg/L) (pg1L) (pgIL) (mg1L) Comments <br /> ATR-11 4/18/1996 - 4684 903 3781 -- -- — — _ — — <br /> 7/18/1996 - 4684 945 3739 <50 — <05 <05 <0 5 <0 5 <5 - <br /> 11/15/1996 -- 4684 995 3689 -- — — -- _ — — <br /> 3/14/1997 NP 4684 986 3698 <50 <05 <0 5 <0 5 <0 5 -- 015 <br /> 6/4/1997 -- 46 84 924 3760 — — -- — -- — -- 008 <br /> 8/11/1997 NP 4684 963 3721 <50 <05 <0 5 <0 5 <05 <25 -- <br /> 11/17/1997 -- 4684 947 3737 -- — — — — — — <br /> 3/3011998 NP 4684 866 3818 <50 -- <0 5 <0 5 <0 5 <0 5 <50 1 5 <br /> 6/25/1998 -- 4684 992 3692 — — -- -- -- — — _ <br /> 9/11/1998 P 4684 940 3744 <50 - <05 <05 <0 5 <0 5 <2 5 161 <br /> 12/15/1998 - 4684 919 3765 1 -- -- -- - - -- - 1 1 <br /> 3/1711999 P 4684 896 3788 <50 - <05 0 821 <0 5 <0 5 <50 37 <br /> 5/14/1999 -- 4684 920 3764 -- - - - _ _ 28 <br /> 9/16/1999 P 4684 952 3732 <50 -- <0 5 <0 5 <0 5 <0 5 <50 34 <br /> 12/22/1999 -- 4684 932 3752 — - -- -. — — — 044 <br /> 2/29/2000 P 4684 860 3824 114 -- <05 0 678 <0 5 163 <25 32 <br /> 6/7/2000 NP 4684 935 3749 — — -- -- -- — — — <br /> 9/25/2000 NP 4684 1021 3663 <50 - <05 <05 <0 5 <0 5 893 05 <br /> 12/21/2000 -- 4684 915 3769 -- -- — — -- -- — 4 5 <br /> 3/27/2001 P 4684 906 3778 <50 0 — <0 500 <0 500 <0 500 <0 500 <2 00" 37 <br /> 6/20/2001 — 4684 925 3759 -- — — -- -- -- — — <br /> 9/12/2001 P 4684 1031 3653 <50 — <050 <0 50 <0 50 <050 <2 5 1 6 <br /> 12/19/2001 -- 4684 914 3770 -- — — — — — _ — <br /> 3/14/2002 P 4684 918 3766 <50 — <0 50 <050 <0 50 <0 50 <2 5 16 <br /> 6/28/2002 - 4684 -- -- -- _ _ — — _ — — <br /> 9/11/2002 P 4684 942 3742 <50 - <0 5 <0 5 <0 5 <0 5 <0 5' 2 <br /> 12/17/2002 -- 4684 — -- -- _ _ — — _ _ — <br /> 03/31/2003 P 4684 910 3774 <50 - <0 50 <0 50 <0 50 <0 50 <0 50' 19 <br /> 06/09/2003 — 4684 908 3776 — — -- <br /> 09118/2003 P 4684 938 3746 <50 — <0 50 <0 50 <0 50 <0 50 <0 50' 19 <br /> 92/24/2003 -- 4684 925 3759 — — -- — __ — — — <br /> 03/12/2004 P 1864 903 961 <50 — <050 <0 50 1 <0 50 <0 50 <0 50' 1 3 <br /> 06/01/2004 — 1864 931 933 — -- — -- — — — Not Sampled <br /> Report Date March 21,2005 Page 22 of 27 <br />