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Table 1. Water-Level Elevations <br /> ARCO Station 2093,Tracy, California <br /> Top-af-Casing Depth to Groundwater Change since <br /> Well No and Elevanon Water Flevauon Last Measurement <br /> date feet a feet feet feet <br /> ATR-1 <br /> 423/87 5058 12.49 3809 - <br /> 12/=7 12.63 3795 -014 <br /> 3/24/88 1254 3804 009 <br /> 6,23/88 1283 3775 -0.29 <br /> 9/29/88 1301 3757 -018 <br /> 222/89 1246 3812 0.55 <br /> 621/89 1237 38.21 009 <br /> 9/18/89 1288 3770 -0.51 <br /> 12127/89 1268 3790 0.20 <br /> 4/18/90 12.84 3774 -016 <br /> 10/16/90 - - - <br /> 10/19/'90 1310 3748 - <br /> 1/10/91 12.78 3780 032 <br /> 4/10/91 1252 3806 0.26 <br /> 7/10/91 12.95 3763 -043 <br /> 9/24/91 1330 37.28 -035 <br /> 1/23/92 12.77 3781 053 <br /> 4/20/92 1258 3800 019 <br /> 7/8/92 1.94 37.68 -0.32 <br /> ATR-2 <br /> 423187 49.22 11.28 3794 - <br /> 122287 1140 37.82 -012 <br /> 324/88 1135 3797 005 <br /> 4123/88 1155 3767 -0.20 <br /> 9/29/88 1171 3751 -016 <br /> 222/89 1135 3797 036 <br /> 6,21/89 1145 37.77 -010 <br /> 9/18/89 1165 3757 -0.20 <br /> 122789 1150 37.72 015 <br /> 4/18/90 1164 3758 -014 <br /> 10/16/90 1181 37.41 -017 <br /> 10/19/90 1181 3741 000 <br /> 1/10/91 1158 3764 0.2.3 <br /> 4/10/91 11.35 3787 0.23 <br /> 7/10/'91 1174 37.48 -0.39 <br /> 9/24/91 12.02 37.20 -0.28 <br /> 123/92 1160 3762 042 <br /> 420/92 1153 3769 007 <br /> 7/8192 1L75 37.47 4).22 <br /> ATR-3 <br /> 423/87 4993 11.79 3814 - <br /> 1222/87 1193 3800 -014 <br /> 3/2488 1258 3735 -065 <br /> 61.3/88 1117 3876 141 <br /> 9129/88 12.23 3770 -106 <br /> 2122/89 1182 3811 041 <br />