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ii <br /> Tabilo Page 14 of 18 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Stabon#2093 <br /> 3425 Tracy Blvd,Tracy,Califomia <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,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (Ppb) (ppb) (ppb) (ppb) (mg/1) <br /> ATR-10 09/24/91 1032 - 3776 -011 - -- - <br /> (cont) 09/25/91 - -- -- <50 <0 5 <05 <0 5 <0 5 <br /> 01/23/92 1000 -- 3807 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/20/92 1001 3806 -001 - - - -- <br /> 04/21/92 -- - - <60 <0 5 <0 5 <0 5 <0 5 - <br /> 07/08/92 1017 - 37 90 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/07/92 1023 3784 -006 <50 <0 5 <0 5 <0 5 <0 5 <br /> 01/18/93 961 38 46 062 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/14/93 9 94 -- 3813 -033 <50 <0 5 <0 5 <0 5 <0 5 <br /> 08/30/93 1023 -- 3784 -029 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/93 1024 -- 3783 -001 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/18/94 1002 - 38 05 022 <10 <0 3 04 <0 3 <0 6 <br /> 05/20/94 1009 3798 -007 <10 <0 3 <0 3 <0 3 <0 5 - <br /> 10/07/94 1024 - 3783 -015 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/94 997 -- 3810 0 27 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/28/95 1015 -- 3792 -018 <50 <0 5 <06 <0 5 <0 5 <br /> 04/25/95 1027 3780 -012 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/27/95 1038 -- 3769 -011 -- -- -- - - <br /> 10/26/95 1041 -- 3766 -003 -- -- - <br /> 02/12/95 1001 -- 3806 040 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/18/96 1023 -- 3784 -0 <br /> 07/18/96 1040 -- 37 67 -017 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 11/15/96 1093 3714 -053 -- - - - <br /> 03/14/97 -- -- -- -- - - <br /> 06/04/97 -- -- -- -- - - - <br /> 08/11197 NP 1056 - 3751 -- <50 <0 5 <0 5 <0 5 <05 <2 5 - <br /> 11/17/97 10 47 37 60 009 -- - - -- <br /> 03/30/98 NP 1005 3802 042 <60 <0 5 <0 5 <0 5 <0 5 <5 0 2 3 <br /> 06/25/98 1025 -- 3782 020 - -- -- -- - - <br /> 09/11/98 NP 1035 -- 3772 -0 10 <50 <0 5 <0 5 <0 5 <0 5 <2 5 143 <br /> 12115/98 1021 3786 014 - - - - 0 6 <br /> 03/17/99 NP 1011 - 37 96 010 <50 <0 5 <0 5 <0 5 <0 5 <6 0 1 30 <br /> 05/14/99 1031 - 3776 020 - -- -- - 170 <br /> 09/16/99 NP 1044 37 63 -013 <50 <0 6 <0 5 <05 <0 5 <5 0 3 9 <br /> 12/22/99 1035 3772 009 - - - - - 164 <br /> 02/29/00 NP 1003 - 3804 0 32 <50 <0 5 <0 5 <0 5 <0 5 <2 5 5 1 <br /> 06/07/00 NP 1035 -- 3772 0 32 -- -- -- - -- <br />