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Table 1. Water-Level Elevations <br /> ARCO Facility 2093, Tracy, California <br /> Tap-of-casing Depth-to- Floating Water-level Change since <br /> Well numberi elevation, water, product thickness elevation, last measurement, <br /> and date in feet(a) in feet in feet in feet(b) in feet <br /> ATR-1 <br /> 4/23/87 5058 1249 -- 3809 -- <br /> 12/22/87 1263 -- 3795 -014 <br /> 3124/88 1254 -- 3804 009 <br /> 6/23/88 1283 -- 3775 -029 <br /> 9/29/88 1301 -- 3757 -018 <br /> 2122/89 1246 -- 38 12 055 <br /> 6/21/89 1237 -- 3821 009 <br /> 9/18/89 1288 -- 3770 -051 <br /> 12/27/89 1268 -- 3790 020 <br /> 4118190 1284 -- 3774 -016 <br /> 10/16/90 -- -- --10/19/90 13 10 -- 3748 -026 <br /> 1/10191 1278 -- 3780 032 <br /> 4/10/91 1252 -- 3806 026 <br /> 7110/91 1295 -- 3763 -043 <br /> 9124/91 1330 -- 3728 -035 <br /> 1/23/92 1277 -- 3781 053 <br /> 4120192 1258 3800 019 <br /> 7/8/92 1290 -- 3768 -032 <br /> 10/7/92 1309 -- 3749 -019 <br /> 1118193 (c) -- <br /> 4/14/93 1231 3827 078 <br /> 8/30/93 13 18 -- 3740 -087 <br /> 10/27/93 13 13 -- 3745 005 <br /> 2/18/94 1265 -- 3793 048 <br /> 5/20/94 1271 3787 -006 <br /> 10/7194 13 14 -- 3744 -043 <br /> 12/16/94 1274 -- 3784 04 <br /> 2/28/95 1265 -- 3793 009 <br /> 4/26195 12.90 -- 37.68 -025 <br /> ATR-2 <br /> 4123/87 4922 1128 -- 3794 -- <br /> 12/22/87 1140 -- 3782 -012 <br /> 3/24/88 11 35 -- 3787 005 <br /> 6/23/88 1155 -- 3767 -020 <br /> 9/29/88 1171 -- 3751 -016 <br /> 2/22/89 1135 -- 3787 036 <br /> 6121/89 1145 -- 3777 -010 <br /> 9118/89 11 65 -- 3757 -020 <br /> 12/27/89 1150 3772 015 <br /> 4118/90 1164 -- 3758 -014 <br /> 10/16/90 1181 -- 3741 -017 <br /> 10/19/90 1181 -- 3741 000 <br /> 1/10191 1158 -- 3764 023 <br /> 4/10/91 1135 -- 3787 023 <br /> 7/10/91 1174 -- 3748 -039 <br /> 9/24191 1202 -- 3720 -028 <br /> I/23/92 1160 -- 3762 042 <br /> 4/20192 11 53 -- 3769 007 <br />