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Table 1 Page 14 of 18 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#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) b b b ( ) (ppb) (m 1) <br /> ATR 10 10/16/90 4807 - <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/19/90 1020 37 87 - -- -- -- -- - <br /> 01/10/91 1007 38 00 0 13 <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 -0 21 <50 <0 5 <0 5 <0 5 <0 5 <br /> 09/24/91 1032 3775 -0 11 -- -- -- -- -- <br /> 09/25/91 - - -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 01/23/92 1000 3807 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/20/92 i 0 01 3806 -001 -- -- -- -- -- <br /> 04/21/92 - - <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/08/92 10 17 3790 - <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/07/92 1023 37 84 006 <50 <0 5 <0 5 <0 5 <0 5 <br /> 01/18/93 961 3846 0 62 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/14/93 9 94 38 13 0 33 <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 /> 10/27l93 1024 3783 001 <50 <0 5 <0 5 <0 5 <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 /> 12/16/94 997 38 10 027 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02128/95 10 15 3792 -018 <50 <0 5 <0 5 <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 10 41 3766 -003 -- -- -- <br /> 02112/96 1001 3806 040 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/18/96 1023 3784 -022 - -- -- -- -- <br /> 07/18/96 10 40 3767 -0 17 <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 /> 08/11/97 <br /> -08111/97 NP 1056 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 38 02 042 <50 <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 /> 12/15198 1021 3786 0 14 -- -- -- -- -- -- 06 <br /> 03/17/99 NP 10 11 3796 0 10 <50 <0 5 <0 5 <0 5 <0 5 <5 0 130 <br /> 05/14/99 1031 3776 -020 -- -- -- -- -- -- 170 <br />