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Table 1. Water-Level Elevations <br /> ARCO Station 2093, Tracy, California <br /> Fop-of-Casing Depth to Floating Groundwater Change since <br /> Welt No .uid Elevation Water Product Elevation Last Measurement <br /> date (feet) (a) (feet) Thickness, (feet) (feet) (feet) <br /> 8/31193 981 - 36 17 -201 <br /> 10/27/93 868 -- 3730 l 13 <br /> 2/17194 825 0 14 3783 053 <br /> 5/20194 855 014 3753 -030 <br /> ATR-9 <br /> 10/16/90 4868 <br /> 10/19/90 1 1 11 -- 3757 - <br /> 1/10/91 1104 37 64 007 <br /> 4/l0/91 1082 -- 3786 022 <br /> 7/10/91 1106 -- 3762 -024 <br /> 9/24/91 1 l 29 -- 3739 -023 <br /> 1123192 1096 -- 3772 033 <br /> 4/20/92 1088 3780 008 <br /> 718/92 1106 -- 3762 -018 <br /> 10/7/92 11 16 -- 3752 -010 <br /> 1/18/93 1034 -- 3834 082 <br /> 4114/93 1070 == 3798 -036 <br /> 8/30/93 11 17 3751 -047 <br /> 10/27/93 1123 -- 3745 -006 <br /> 2/17/94 1089 - 3779 034 <br /> 5/20/94 1097 37.71 -008 <br /> ATR-10 <br /> 10/16/90 4807 - - _ <br /> 10/19/90 1020 -- 3787 - <br /> 1/10/91 1007 -- 3800 013 <br /> 4/10/91 1000 -- 3807 007 <br /> 7/12/91 1021 -- 3786 -021 <br /> 9/24/91 1032 -- 3775 -011 <br /> 1/23/92 1000 -- 3807 032 <br /> 4/20/92 1001 -- 3806 -001 <br /> 7/8/92 10 17 -- 3790 -016 <br /> 10/7/92 1023 -- 3784 -006 <br /> 1/18/93 961 3846 062 <br /> 4/14/93 994 -- 38 13 -033 <br /> 8/30193 1023 -- 3784 -029 <br /> 10/27/93 1024 3783 -001 <br /> 2/18/94 1002 -- 3805 022 <br /> 5/20/94 10.09 -- 3798 -007 <br /> ATR-11 <br /> 8/25/91 4684 - - _ <br /> 9/24/91 950 -- 3734 - <br />