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i <br /> TableO Pago 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) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/1) <br /> ATR-7 09/11/98 NP 1251 -- 3714 -005 <50 <0 5 <0 5 <0 5 <0 5 <2 5 1 14 <br /> (cont) 12/15/98 NP 12 41 -- 3724 010 <50 <0 5 <0 5 <0 5 <0 5 <5 0 220 <br /> 03/17/99 NP 1223 -- 3742 018 <50 <0 5 <0 5 <0 5 <0 5 <5 0 200 <br /> 05/14/99 NP 1241 -- 3724 -018 <50 <0 5 <0 5 <0 5 <0 5 <5 D 190 <br /> 09/16/99 NP 1258 3707 -017 <50 <0 5 <0 5 <0 5 <0 5 <5 0 360 <br /> 12/22/99 NP 1252 -- 3713 006 <50 <0 5 <0 5 <0 5 <0 5 <2 50 420 <br /> 02/29/00 NP 1206 -- 3759 046 <50 <0 5 <0 5 <0 5 <0 5 <2 50 470 <br /> 06/07/00 NP 1255 - 3710 -0 49 <50 <0 5 <0 5 <0 5 <0 5 572 <br /> 09/25/00 NP 1271 -- 3694 -0 16 <50 <0 5 <0 5 <0 5 <0 5 <2 50 050 <br /> 12/29/00 P 1243 -- 3722 028 <50 Q c0 500 <0 500 <D 500 0 656 175" 67 <br /> 03/27/01 P 1233 - 3732 010 <50 0 <0 500 <0 500 <0 500 <0 500 305' 38 <br /> ATR-8 08/25/91 4S98 -- -- -- 2,700 116 <0 5 130 98 - <br /> 09/25/91 885 -- 3713 -- 1,400 95 <0 5 51 97 <br /> 01/23/92 829 - 3769 056 <50 25 <0 5 <0 5 <0 5 <br /> 04/20/92 811 3787 018 -- -- -- -- - <br /> 04/21/92 -- -- -- 140 14 09 14 93 <br /> 07/08/92 848 - 3760 -- 87 40 <0 5 92 08 <br /> 10/07/92 869 3729 -021 -- - -- - <br /> 10/08/92 -- -- -- -- 140 78 32 11 88 - <br /> 01/18/93 709 3889 -- - -- <br /> 01/19/93 -- - -- - 980 140 17 11 34 <br /> 04/14/93 780 3818 -- -- - <br /> 04/15/93 -- - -- -- 110 42 <0 5 46 49 <br /> 68/31/93 981 -- 3617 -- 700 ISO 15 41 71 <br /> 10/27/93 868 3730 1 13 52,000 620 2,100 2,800 8 700 <br /> 02/17/94 825 014 3783 053 -- -- - - <br /> 05/20/94 855 014 3753 -030 -- - <br /> 10/07/94 870 014 3738 -016 - - <br /> 12/16/94 821 Sheen 3777 039 - <br /> 02/28/95 845 002 3754 -023 - <br /> 04/26/95 851 050 3782 028 - <br /> 07/27/95 986 012 3621 -1 61 <br /> 10/26/95 928 003 3672 061 <br /> 02!12196 787 002 3812 140 - <br /> 04/18/96 846 002 3754 058 <br />