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i ! • <br /> Table 1 Page 14 of 18 <br /> Groundwater Elevation and Analytical Data <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,TOC) In feet (feet,MSL) (feel) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/1) <br /> ATR-10 10/16/90 4807 -- -- -- - <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/19/90 1020 - 3787 -- -- -- -- - <br /> 01/10/91 1007 -- 3800 013 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/10/91 1000 -- 3807 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/12/91 1021 - 3786 021 <50 <0 5 <0 5 <0 5 <0 5 <br /> 09/24/91 1032 -- 3775 Oil -- -- -- -- - <br /> 09/25/91 -- -- -- <50 <0 5 <0 5 <0 5 <0 6 <br /> 01123/92 1000 3807 -- <50 <0 5 <0 5 <0 5 <05 <br /> 04/20/92 1001 -- 3806 -001 -- - -- -- <br /> 04/21/92 -- -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/08/92 1017 - 3790 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/07/92 1023 - 3784 006 <50 <06 <0 5 <0 5 <0 5 <br /> 01/18/93 961 -- 3846 062 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04114/93 994 - 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 6 <0 5 <br /> 02)18/94 1002 -- 3805 022 <10 <0 3 04 <0 3 <0 5 <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 9 97 - 3810 027 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/28/95 1016 -- 3792 -018 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/25/95 1027 -- 3780 -012 <60 <0 5 <0 5 <0 5 <0 5 <br /> 07/27/95 1038 -- 3769 -011 -- -- <br /> 10/26/95 1041 -- 3766 -003 -- -- -- -- <br /> 02/12/96 10 01 -- 3806 040 <50 <05 <0 5 <0 5 <0 5 <br /> 04/18/96 1023 -- 3784 -022 -- -- - - - <br /> 07/18/96 1040 -- 3767 -017 <50 <0 5 <0 5 <0 5 <0 6 <5 <br /> 11/15/96 1093 3714 -053 -- -- -- -- - - <br /> 03/14/97 -- -- -- <br /> 06/04/97 -- -- -- -- - <br /> 08/11/97 NP 1066 -- 3751 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 - <br /> 11/17/97 1047 3760 009 -- -- -- -- -- -- -- <br /> 03/30/98 NP 1005 3802 042 <50 <0 5 <0 5 <0 5 <0 5 <5 0 23 <br /> 06/25/98 1026 -- 3782 -020 -- - -- - -- - - <br /> 09/11/98 NP 1036 -- 3772 -010 <50 <0 5 <0 5 <0 5 <0 5 <2 5 1 43 <br /> 12/15/98 1021 3786 014 - -- -- -- - 06 <br />