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Table 1. Water-Level Elevations <br /> ARCO Facility 2093, Tracy, California <br />• Top-of-casing Depth-to- Floating Water-level Change since <br /> Well number elevation water product elevation last measurement <br /> and date (feet) (a) (feet) thickness, (feet) (feet) (feet) <br /> ATR-9 <br /> 10/16/90 4868 -- -- -- -- <br /> 10/19/90 11 11 -- 3757 -- <br /> 1/10/91 1104 -- 3764 007 <br /> 4/10/91 1082 -- 3786 022 <br /> 7/10/91 1106 -- 3762 -024 <br /> 9124/91 1129 -- 3739 -023 <br /> 1/23/92 1096 -- 3772 033 <br /> 4120192 1088 -- 3780 008 <br /> 7/8/92 1106 -- 3762 -018 <br /> 1017192 11 16 -- 3752 -010 <br /> 1/18193 1034 -- 3834 082 <br /> 4/14193 1070 -- 3798 -036 <br /> 8130/93 It 17 -- 3751 -047 <br /> 10/27/93 11 23 -- 3745 -006 <br /> 2117/94 1089 -- 3779 034 <br /> 5120194 1097 -- 3771 -008 <br /> 1017/94 11 19 -- 3749 -022 <br /> 12/16/94 10.91 -- 37.77 0.28 <br /> ATR-10 -- -- -- -- <br /> 10/16/90 4807 <br /> 10/19/90 1020 -- 3787 -- <br /> 1/10/91 1007 -- 3800 013 <br /> 4/10191 1000 -- 3807 007 <br /> 7/12191 1021 -- 3786 -021 <br /> 9/24/91 1032 3775 -011 <br /> 1/23/92 1000 -- 3807 032 <br /> 4120/92 1001 -- 3806 -001 <br /> 7/8/92 1017 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 /> 8/30/93 1023 -- 3784 -029 <br /> 10/27/93 1024 -- 3783 -001 <br /> 2/18/94 1002 -- 3805 022 <br /> 5/20/94 1009 -- 3798 -007 <br /> 10/7/94 1024 -- 3783 -015 <br /> 12/16/94 9.97 -- 38.10 027 <br /> ATR-11 <br /> 8/25/91 4684 -- -- -- -- <br /> 9/24191 950 -- 3734 -- <br /> 1123/92 895 == 3789 055 <br /> 4/20/92 878 3806 017 <br /> 718192 9 12 -- 3772 -034 <br /> 10/7/92 930 -- 3754 -018 <br /> 1/18/93 780 -- 3904 150 <br /> 4/14/93 847 3837 -067 <br />