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Table 1. Water-Level Elevations <br /> ARCO Station 2093, Tracy, California (continued) <br /> Top-of-Casing Depth to Groundwater Change since <br /> We11 No and Elevauon Water Elevauon Last Measurement <br /> date (feet)(a) (feet) (feet) (feet) <br /> 4/20/92 1156 3779 010 <br /> 7/8/92 1172 3763 -016 <br /> 10/7192 1182 3753 -010 <br /> 1/18/93 1104 3831 078 <br /> 4/14/93 1142 3793 -038 <br /> 8/31/93 (e) <br /> ATR-7 <br /> 3/10/89 4965 - _ _ <br /> 6/21/89 1190 3775 - <br /> 9/18/89 1198 3767 -008 <br /> 12/27/89 1194 3771 004 <br /> 4/18/90 1201 3764 -007 <br /> 10/16/90 - _ _ <br /> 10/19/90 1220 3745 - <br /> 4/10/91 _ _ _ <br /> 7/10/91 _ _ _ <br /> . 9/24/91 1234 3731 = <br /> 1/23/92 <br /> 4/20/92 <br /> 7/8/92 -- -- -- <br /> 10/7/92 1221 3744 <br /> 1/18/93 1133 3832 088 <br /> 4/14/93 1175 3790 -042 <br /> 8/31/93 1224 37.41 -049 <br /> ATR-8 <br /> 8/25/91 4598 <br /> 9/25/91 885 37 13 - <br /> 1/23/92 829 3769 056 <br /> 4/20/92 811 3787 018 <br /> 7/8/92 848 3750 -037 <br /> 10(7/92 869 3729 -021 <br /> 1/18/93 709 3889 160 <br /> 4/14/93 780 38 18 -071 <br /> 8/31/93 981 3617 -201 <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 /> 9/24/91 1129 3739 -023 <br />