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i <br /> Table 1. Water-Level Elevations <br /> ARCO Facility 2093, Tracy, California <br /> Top-of-casing Depth-to- Floating Water-level Change since <br /> Well number elevation water product elevation last measurement <br /> and date (feet) (a) (feet) thickness, (feet) (feet) (feet) <br /> ATR-1 <br /> 4/23/87 5058 1249 -- 38 09 <br /> 12/22/87 1263 -- 37 95 -014 <br /> 3/24/88 1254 -- 38 04 009 <br /> 6123/88 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 /> 4/18/90 1284 -- 3774 -016 <br /> 10/16/90 -- <br /> 10/19/90 1310 -- 3748 -026 <br /> 1/10/91 1278 -- 37 80 032 <br /> 4/10/91 1252 -- 38 06 026 <br /> 7110/91 1295 -- 37 63 -043 <br /> 9/24/91 1330 -- 3728 -0 35 <br /> 1/23192 1277 -- 3781 053 <br /> 4/20/92 1258 -- 3800 019 <br /> 7/8/92 1290 3768 -032 <br /> 10/7192 13 09 3749 -019 <br /> 1/18/93 (b) <br /> 4/14/93 1231 -- 3827 078 <br /> 8/30/93 13 18 -- 3740 -0 87 <br /> 10/27/93 13 13 -- 3745 005 <br /> 2/18/94 12 65 -- 3793 048 <br /> 5/20/94 1271 -- 3787 -006 <br /> 10/7/94 13 14 -- 3744 -043 <br /> 12/15/94 12.74 -- 37.84 0.4 <br /> ATR-2 <br /> 4/23/87 4922 1128 -- 3794 <br /> 12/22/87 1140 -- 3782 -012 <br /> 3/24/88 1135 -- 37 87 005 <br /> 6/23/88 11 55 -- 3767 -020 <br /> 9/29/88 11 71 3751 -016 <br /> 2/22/89 11 35 3787 036 <br /> 6/21/89 11 45 -- 37 77 -010 <br /> 9/18/89 1165 -- 3757 -020 <br /> 12/27/89 11 50 -- 3772 0 15 <br /> 4/18/90 11 64 -- 3758 -0 14 <br /> 10/16/90 11 81 -- 3741 -017 <br /> 10/19/90 11 81 -- 3741 000 <br /> 1/10/91 11 58 -- 37 64 023 <br /> 4/10/91 11 35 -- 37 87 0 23 <br /> 7110191 1174 -- 3748 -039 <br />• 9/24/91 1202 i= 3720 -0 28 <br /> 1/23/92 1160 3762 042 <br /> 4/20/92 1153 -- 3769 0 07 <br /> 7/8192 If 75 -- 3747 -022 <br /> 1017/92 11 83 3739 -008 <br /> 1118193 (b) <br /> 4/14/93 1129 -- 3793 054 <br />