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Table 1. Water-Level Elevations <br /> ARCO Facility 2093, Tracy, California <br /> Top-of-casing Depth-to- Floating Groundwater Change since <br /> 0 <br /> Well number elevation water Product elevation last measurement <br /> and date (feet) (a) (feet) Thickness, (feet) (feet) (feet) <br /> 10/27/93 868 -- 3730 1 13 <br /> 2/17/94 825 0 14 3783 053 <br /> 5/20/94 855 014 3753 -030 <br /> 10/7/94 870 0 14 3738 -015 <br /> ATR-9 <br /> 10/16/90 48 68 <br /> 10/19/90 1 l 1 L -- 3757 -- <br /> 1/10/91 1 104 -- 37 64 007 <br /> 4/I0/91 1082 -- 3786 022 <br /> 7/10/91 1106 -- 3762 -024 <br /> 9124/91 1129 -- 3739 -0 23 <br /> 1/23/92 1096 -- 37 72 0 33 <br /> 4/20/92 1088 -- 37 80 008 <br /> 718/92 1 106 -- 37 62 -0 18 <br /> 1017192 11 16 -- 3752 -0 10 <br /> 1118/93 1034 3834 0 82 <br /> -,/14/93 1070 -- 3798 -036 <br /> 8/30/93 11 17 -- 3751 -047 <br /> 10/27/93 1123 -- 3745 -006 <br /> 2/17/94 1089 -- 37 79 034 <br /> 5/20/94 1097 -- 3771 -0 08 <br /> 10/7/9.1 1119 -- 3749 -022 <br /> ATR-10 <br /> 10/16/90 48 07 -- -- __ <br /> 10/19/90 1020 -- 37 87 -- <br /> 1/10/91 1007 -- 38 00 0 13 <br /> 4/10/91 1000 -- 3807 007 <br /> 7112191 1021 -- 3786 -021 <br /> 9/24/91 1032 -- 37 75 -011 <br /> 1/23/92 1000 -- 3807 032 <br /> 4/20/92 1001 -- 38 06 -001 <br /> 718192 1017 3790 -0 16 <br /> 10/7192 1023 -- 3784 -0 06 <br /> 1/18/93 9 61 -- 3846 062 <br /> 4/14/93 994 -- 38 13 -0 33 <br /> 8/30/93 1023 3784 -029 <br /> 10/27/93 10 24 -- 3783 -0 01 <br /> 2118/94 1002 -- 38 05 022 <br /> 5120/94 1009 -- 3798 -0 07 <br /> 10/7/94 10.24 -- 37.83 -015 <br /> ATR-11 <br /> 8/25/91 4684 <br /> 9/24/91 9 50 -- 3734 -- <br /> 1/23/92 8 95 -- 37 89 055 <br />