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Table 1. Summa of Groundwater water Mon,tormg Data: Water Elevations and Analyses <br /> ARCO Facility 2093, Tracy, California <br /> Floating Change Concentrations inµg/l, I m <br /> Top-of-casing Depth-to- product Water-level since Iast <br /> We1l number elevation, water, thickness elevation, measurement, Total <br /> and date in feet(a) in feet in feet in feet(b) in feet Benzene Toluene Eth lbenzene Xylenes TPH-G MTBE DO <br /> 4114193 847 -- 3837 -067 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 8/31/93 938 -- 3746 -0 91 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/27/93 931 -- 3753 007 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 2/18/94 883 -- 3801 048 0 8 1 <0 3 0 6 <10 <br /> 5/20/94 8 93 3791 -010 <0 3 <0 3 <0 3 <0 5 <10 -- -- <br /> 10/7/94 934 -- 3750 -041 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 12/16/94 8 91 -- 37 93 0 43 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 2/28/95 8 85 -- 37 99 006 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4125/95 9 11 -- 3773 -026 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 7/27/95 943 -- 3741 -032 -- -- _- __ -- <br /> 10/26/95 9 59 -- 3725 -0 16 <br /> 2112196 842 -- 3842 1 17 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4/18/96 903 -- 3781 -0 61 -- -- _- -_ __ <br /> 7/18/96 9 45 -- 3739 -042 <0 5 <0 5 <0 5 <0 5 <50 <5 -- <br /> 11/I5/96 995 -- 3689 -0 50 -- -- -- _- <br /> 3/14/97 986 -- 3698 009 <0 5 <0 5 <0 5 <0 5 <50 -- 0 15 <br /> 6/4/97 9.24 -- 37,60 0,62 -- — -- — — -- 0.08 <br /> ATR-12 <br /> 10/16/90 4708 -- -- -- -- <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/19/90 933 -- 3775 -- __ -_ -- <br /> 1/10191 9 16 -- 3792 0 17 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4/10/9I 898 -- 38 10 0 18 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 7/12/91 928 -- 3780 -030 <0 5 <0 5 <0 5 <0 5 <50 <br /> 9/24191 952 -- 3756 -024 -- -- __ _- _- <br /> 9/25/91 -- -- -- -- <0 5 <0 S <0 5 <0 5 <50 -- -- <br /> 1/23/92 906 -- 3802 -- <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/20/92 900 -- 3808 006 -- -- -_ -- <br /> 4/21/92 -- -- -- -- <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 7/8/92 921 -- 3787 -- <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/7/92 932 -- 3776 -0 11 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1118193 832 -- 3876 100 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4/14/93 879 -- 3829 -047 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 8131193 939 -- 3769 -060 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/27/93 936 -- 3772 003 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4747UABLES=93JUN7 XIS <br />