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Table 1. Water-Level Elevations <br /> ARCO Station 2093, Tracy, California (continued) <br /> Top-of-Casing Depth to Groundwatcel Change swce <br /> Weld No and Elevation Water Elevauon Last Measurement <br /> date (feet)(a) (feet) (feet) (feet) <br /> ATR-3 <br /> 4/23/87 4993 1179 3814 - <br /> 12/22/87 1193 3800 -014 <br /> 3124/88 1258 37.35 -065 <br /> 6/23/88 11 17 3876 141 <br /> 9/29/88 12-23 3770 -106 <br /> 2/22189 1182 3811 041 <br /> 6/29/89 - - - <br /> 9/18/89 1219 3774 - <br /> 12/28/89 12.01 3792 018 <br /> 4/18190 12.15 3778 -014 <br /> 10/16/90 12.35 3758 -020 <br /> 10/19/90 12.28 3765 007 <br /> 1/10/91 12.01 3792 027 <br /> 4/10/91 1182 3811 019 <br /> 7110191 1223 3770 -041 <br /> 9/24/91 1257 3736 -034 <br /> 1/23/92 12-12 3791 045 <br /> 4/20/92 1193 38.00 019 <br /> 7/8/92 12.22 37.71 -029 <br /> i0/7/92 12.38 3755 -016 <br /> 1/18193 11.22 38.71 1.16 <br /> ATR-4 <br /> 4/23/87 4903 10.85 3818 - <br /> IZ 2?I87 11.00 38.03 -015 <br /> 3/24188 10.98 38.05 002 <br /> 6/2388 12.11 36.92 -113 <br /> 9/29/88 10.72 38.31 1.39 <br /> 2/22/89 10.91 38.12 -019 <br /> 6/29/89 11.00 38.03 -009 <br /> 911889 11.19 3794 -0.19 <br /> 12/2889 11.08 37.95 0.11 <br /> 4/18/90 11.25 37.78 -017 <br /> 10/16/90 11.38 37.65 -013 <br /> 1110/91 11.16 3787 022 <br /> 4/10/91 10.99 38.04 0.17 <br /> 7/10/91 11.32 3771 -033 <br /> 9/24191 11.57 3746 -025 <br /> 1/23/92 1116 3787 0.41 <br /> 4/20/92 11.12 37.91 004 <br /> 7/8192 11.31 3772 -019 <br /> 10/7/92 11.45 37.58 -014 <br /> 1118/93 10.45 38.58 1.00 <br />