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Table 1 Water-Level Elevations <br /> ARCO Station 2093,Tracy, California(cont'd) <br /> Tap-of-Casing Depth to Groundwater Change since <br /> Well No and Elevation Water Elevation Last Measurement <br /> date (feet)(a) (feet) (feet) (feet) <br /> 9/18/89 1219 3774 - <br /> 12/28/89 1201 3792 018 <br /> 4/18/90 1215 3778 -014 <br /> 10/16/90 1235 3758 -020 <br /> 10/19/90 1228 3765 007 <br /> 1/10191 1201 3792 027 <br /> 4110/91 1182 38 11 019 <br /> 7/10/91 1223 3770 -041 <br /> 9/24/91 1257 3736 -034 <br /> 1/23/92 12.12 37.81 045 <br /> ATR-4 <br /> 4/23/87 4903 1085 38 18 - <br /> 12/22/87 1100 3803 -015 <br /> 3/24188 1098 3805 002 <br /> 6/23/88 1211 3692 -1 13 <br /> 9/29/88 1072 3831 139 <br /> 2/22/89 1091 38 12 -019 <br /> 6/29/89 1100 3803 -009 <br /> 9/18/89 1119 3784 -019 <br /> 12/28/89 1108 3795 Oil <br /> 4118/90 1125 3778 -017 <br /> 10/16/90 1138 3765 -013 <br /> 1/10191 1116 3787 022 <br /> 4/10/91 1099 3804 017 <br /> 7/10/91 1132 3771 -033 <br /> 9/24/91 1157 3746 -025 <br /> 1/23/92 1L16 37.87 0.41 <br /> ATR-5 <br /> 3/10/89 4873 - - - <br /> 6/29/89 (b) 1052 3821 - <br /> 9/18/89 (b) 1098 3775 -046 <br /> 12/27/89 (b) 1076 3797 022 <br /> 4/18/90 (b) 1090 3783 -014 <br /> 10/16/90 - - - <br /> 10/19/90 1110 3763 - <br /> 1/10/91 1084 3789 026 <br /> 4/10191 1067 3806 017 <br /> 7/10/91 1102 3771 -035 <br /> 9/24/91 1129 3744 -027 <br /> 1123/92 10.78 37.95 0.51 <br />