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Tao Pof 18 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Seance Station#2093 <br /> 3425 Tracy Blvd,Tracy,California <br /> Floating <br /> Well Depth product Groundwater Groundwater Total <br /> Date Elevation to Water thickness Elevabon 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 /> 06(04/97 NP 1026 -- -- -- 97 27 <0 5 <0 5 <0 5 <2 5 0 17 <br /> ATR-5 08/11/97 NP 1044 -- - 220 34 06 <0 5 <0 5 69 <br /> (cont) 11/17/97 NP 1050 -- -- -- 190 28 065 <0 5 <0 5 51 <br /> 03/30/98 NP 981 -- -- -- 88 <0 5 <0 5 <0 5 <0 5 62 21 <br /> 06125(98 NP 1011 -- -- <50 <0 5 <0 5 <0 5 <0 5 911 15 <br /> 09/11/98 Welllnaccessable - -- -- -- - <br /> 12/15/98 NP 1020 -- — - 134 <0 5 <0 5 <0 5 <0 5 898 1 7 <br /> 03/17/99 NP 981 -- -- 756 0 586 <0 5 0 876 102 <5 0 74 <br /> 05/14/99 NP 1034 -- -- <50 <0 5 <0 5 <0 5 <0 5 <5 85 <br /> 09/16/99 NP 1040 -- -- <50 <0 5 <0 5 <0 5 <0 5 512 22 <br /> 12/22/99 NP 1030 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <2 50 635 <br /> 02/29/00 NP 970 - -- <50 <0 5 <0 5 <0 5 <0 5 306 29 <br /> 06/07/00 Wall Inaccessible -- — -- -- -- -- -- -- <br /> 09/25/00 NP 1057 -- 3816 — <50 <0 5 <0 5 <0 5 <0 5 4 50 040 <br /> ATR-6 03/10/89 4935 -- -- -- -- <200 <0 5 <0 5 <0 5 <0 5 - -- <br /> 06/21/89 1154 -- 3781 -- <50 <0 3 <0 3 <0 3 03 <br /> 09/18/89 1160 - 3775 006 <50 05 13 03 38 <br /> 12/27/89 1157 -- 3778 003 <50 <0 3 <0 3 <0 3 04 <br /> 04/18/90 1168 -- 3767 -011 <50 19 24 06 5 <br /> 10/16/90 -- -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/19/90 1180 - 3755 -- -- -- -- - -- <br /> 01/10/91 1164 -- 3771 016 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/10/91 1152 -- 3783 012 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/10/91 1176 -- 3759 024 <50 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 09/24/91 1195 - 3740 -0 19 <50 <0 5 <0 5 <0 5 <0 5 <br /> 01/23/92 1166 -- 3769 029 <50 <0 5 <0 5 <0 5 <0 5 - -- <br /> 04/20/92 1166 -- 3779 010 -- -- -- - -- <br /> 04/21/92 -- -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/08/92 1172 -- 3763 <50 <0 5 <0 5 <0 5 <0 5 <br />