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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 /> Well No and Elevation Water Elevation Last Measurement <br /> date (feet)(a) (feet) (feet) (feet) <br /> ATA-3 <br /> 4/23/87 4993 1179 3814 - <br /> 12/22/87 1193 3800 -014 <br /> 3/24/88 1258 3735 -065 <br /> 6/23/88 1117 3876 141 <br /> 9/29/88 1223 3770 -106 <br /> 2/22189 1182 3811 041 <br /> 6/29189 - - - <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 /> 1/10/91 1201 3792 027 <br /> 4/10/91 1182 3811 019 <br /> 7/10/91 1223 3770 -041 <br /> 9/24/91 1257 3736 -034 <br /> 1/23/92 1212 3781 045 <br /> 4/20/92 1193 3800 019 <br /> 7/8/92 1222 3771 -029 <br /> 10/7/92 1238 3755 -o16 <br /> 1/18/93 11.22 3871 116 <br /> ATR-4 <br /> 4/23/87 4903 1085 3818 - <br /> 12/22/87 1100 3803 -015 <br /> 3/24/88 1098 3805 002 <br /> 6/23/88 1211 3692 -113 <br /> 9/29/88 1072 3831 139 <br /> 2/22/89 1091 3812 -019 <br /> 6/29189 1100 3803 -009 <br /> 9/18/89 1119 3784 -019 <br /> 12/28/89 1108 3795 Oil <br /> 4/18/90 1125 3778 -017 <br /> 10/16/90 1138 3765 -013 <br /> 1/10/91 1116 3787 022 <br /> 4/10191 1099 3804 017 <br /> 7/10/91 1132 3771 -033 <br /> 9/24/91 1157 3746 -025 <br /> 1/23/92 1116 3787 041 <br /> 4/20192 1112 3791 004 <br /> 7/8/92 1131 3772 -019 <br /> 10/7/92 1145 3758 -014 <br /> 1118/93 10.45 3858 1.00 <br />