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Table 1. Water-Level Elevations <br /> ARCO Station 2093, Tracy, California <br /> fop-ot-Casing Depth to Floaung Groundwater Change since <br /> Well No and Elevation Water Product Elevation Last Measurement <br /> date (feet) (a) (feet) T7uckness, (feet) (feet) (feet) <br /> 7/8/92 1175 -- 3747 -022 <br /> 10/7/92 1183 -- 3739 -008 <br /> 1/18/93 (b) - -- -- <br /> 4/14/93 1129 3793 054 <br /> 8130193 1196 -- 3726 -067 <br /> 10/27/93 1 195 - 37 27 001 <br /> 2/18/94 11 54 - 3768 041 <br /> 5/20/94 1161 -- 37.61 -0.07 <br /> ATR-3 <br /> 4/23/87 4993 11 79 38 14 - <br /> 12/22/87 1193 3800 -014 <br /> 3124/88 1258 -- 3735 -065 <br /> 6/23/88 11 17 -- 3876 141 <br /> 9/29/88 1223 -- 3770 -106 <br /> 2/22/89 1182 -- 38 11 041 <br /> 6/29189 - - - - <br /> 9/18/89 1219 -- 3774 -037 <br /> 12/28/89 1201 -- 3792 018 <br /> 4118/90 12 15 -- 3778 -014 <br /> 10/16/90 1235 3758 -020 <br /> 10/19/90 1228 -- 3765 007 <br /> 1/10/91 1201 -- 3792 027 <br /> 4/10191 1182 -- 3811 019 <br /> 7/10/91 1223 -- 3770 -041 <br /> 9124/91 1257 -- 3736 -034 <br /> 1/23/92 1212 -- 3781 045 <br /> 4/20/92 1193 -- 3800 019 <br /> 7/8192 1222 -- 3771 -029 <br /> 1017/92 1238 -- 3755 -016 <br /> 1/18/93 1122 - 3871 1 16 <br /> 4/14/93 1149 - 3844 -027 <br /> 8130/93 1243 3750 -094 <br /> 10/27/93 1239 -- 3754 004 <br /> 2/18/94 1200 -- 3793 039 <br /> 5/20/94 1207 -- 3786 -007 <br /> ATR-4 <br /> 4/23/87 4903 1085 -- 38 18 - <br /> 12/22/87 1100 -- 3803 -0 15 <br /> 3/24188 1098 3805 002 <br /> 6/23/88 12 11 -- 3692 -1 13 <br /> 9/29/88 1072 -- 3831 139 <br /> 2/22189 1091 -- 38 12 -019 <br /> 6/29/89 1100 -- 3803 -009 <br /> 9/18/89 11 19 3784 -019 <br /> 12/28/89 1108 -- 3795 Oil <br /> 4/18190 1125 3778 -0 17 <br />