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Table 1 Page 13 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) (feet) b b b b b (ppb) (mg/1) <br /> 10/07/94 11 19 3749 -022 <50 <0 5 <0 5 <0 5 <0 5 <br /> ATR 9 12/16/94 10 91 3777 028 <50 <0 5 <0 5 <0 5 <0 5 <br /> (cont) 02/28/95 1093 3775 -002 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/25/95 11 46 3722 -053 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/27/95 1173 3695 027 - -- -- -- <br /> 10/26/95 11 80 3688 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/12/96 1090 3778 090 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/18/96 11 30 3738 040 -- -- <br /> 07/18/96 i 1 68 3700 -038 <50 <0 5 <0 5 <0 5 <0 5 <5 - <br /> 11115!96 1223 3645 -055 -- -- -- -- <br /> 03/14/97 NP 1223 3645 000 <50 <0 5 <0 5 <0 5 <0 5 020 <br /> 06/04/97 11 52 3716 071 - -- -- -- 040 <br /> 08/11/97 NP 11 86 3682 -034 <50 <0 5 <0 5 <0 5 <0 5 <2 5 -- <br /> 11/17/97 11 72 3696 0 14 -- -- -- <br /> 03/30/98 NP 11 10 3758 062 <50 <0 5 <0 5 <0 5 <0 5 <5 0/<2 0" 240 <br /> 06/25/98 1151 3717 041 -- -- -- <br /> 09/11/98 NP 11 65 3703 0 14 <50 <0 5 <0 5 <0 5 <0 5 <2 5 1 81 <br /> 12/15/98 1153 3715 012 -- -- -- - 1 70 <br /> 03/17/99 NP 11 25 3743 028 <50 <0 5 <0 5 <0 5 <0 5 <50 1 60 <br /> 05/14/99 NP 11 50 3718 025 -- -- -- -- - 240 <br /> 09/16/99 NP 11 74 3694 -024 <50 <0 5 <0 5 <0 5 <0 5 <5 0 430 <br /> 12/22/99 NP 11 61 3707 013 -- -- -- - -- 1 99 <br /> 02/29/00 NP 11 04 3764 057 <50 <0 5 <0 5 <0 5 <0 5 <2 5 430 <br /> 06/07/00 Well inaccessible - -- - -- -- -- -- <br /> 09/25/00 Well Inaccessible - <br /> 12/21/00 Well Inaccessible -- -- -- -- -- — -- -- <br />