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Table 1 Page 15 of 18 <br /> Groundwater Elevation and Analytical Date <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,Tracy,California <br /> Floating <br /> Well Depth product Groundwater Groundwater Total <br /> Date Elevation to Water thickness Elevation Elevation Change TPHg Benzene Toluene Ethylbenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOG) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/1) <br /> 09/16/99 NP 1044 3763 -013 <50 <0 5 <0 5 <0 5 <0 5 <5 0 39 <br /> ATR 10 12/22/99 1035 3772 009 -- -- -- -- -- -- 1 54 <br /> (cant) 02/29/00 NP 1003 3804 032 <50 <0 5 <0 5 <0 5 <0 5 <2 5 5 1 <br /> 06/07/00 NP 1035 3772 -032 - -- - - -- - - <br /> 09/25/00 NP 1045 3762 -010 <50 <0 5 <0 5 <0 5 <0 5 <2 5 060 <br /> 12121/00 1030 -- 3777 015 - -- -- - - -- 71 <br /> ATR 11 08/25/91 4684 - -- -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 09/24/91 950 3734 - -- -- -- -- <br /> 09Y25191 - - <50 <0 5 <0 5 <0 5 <0 5 <br /> 01123!92 895 3789 - <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/20/92 878 3806 017 -- -- -- -- - <br /> 04/21/92 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/08/92 9 12 3772 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/07/92 930 3754 -0 18 <50 <0 5 <0 5 <0 5 <0 5 <br /> 0 V i 8193 780 3904 150 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/14/93 847 3837 067 <50 <0 5 <0 5 <0 5 <0 5 <br /> 08/31/93 938 3746 091 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/93 931 3753 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/18/94 883 3501 048 <10 08 1 <0 3 06 <br /> 05/20/94 893 3791 -010 <10 <0 3 <0 3 <0 3 <0 5 - <br /> 10/07/94 934 3750 -041 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/94 891 3793 043 <50 <05 <05 <05 <05 - <br /> 02/28/95 885 3799 006 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/25/95 9 11 3773 026 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/27195 943 3741 032 -- -- -- -- -- -- - <br /> 10/26195 959 3725 -016 -- -- -- -- - - <br /> 02/12l96 842 3842 1 17 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/18/96 903 3781 -061 - -- -- -- - <br /> 07/18/96 945 3739 -042 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 11/15/96 995 3689 -050 - -- -- - -- - - <br /> 03/14/97 NP 986 3698 009 <50 <0 5 <0 5 <0 5 <0 5 0 15 <br /> 06/04/97 924 3760 062 -- -- -- -- -- 008 <br /> 08/11/97 NP 963 3721 -039 <50 <0 5 <0 5 <0 5 <0 5 <2 5 - <br /> 11/17/97 947 3737 016 -- -- -- -- <br /> 03134(98 NP 866 38 18 081 <50 <0 5 <0 5 <0 5 <0 5 <5 0 15 <br /> 06/25/98 992 3692 -126 -- -- -- -- -- - <br /> 09/11/98 P 940 3744 052 <50 <0 5 <0 5 <0 5 <0 5 <2 5 1 61 <br />