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Table 1 Water-Level Elevations <br /> ARCO Facility 2093, Tracy, Califorrua <br /> Tap-of-casing Depth-to- Floating Groundwater Change since <br /> Well number elevation water Product elevation last measurement <br /> and date (feet) (a) (feet) Thickness, (feet) (feet) (feet) <br /> 1/18/93 (b) <br /> 4/14/93 1129 3793 054 <br /> 8130/93 11 96 3726 -067 <br /> 10/27/93 1195 -- 3727 001 <br /> 2/18/94 11 54 -- 3768 041 <br /> 5/20/94 1161 -- 3761 -007 <br /> 10/7194 1193 -- 3729 -032 <br /> ATR-3 <br /> 4123187 4993 11 79 -- 38 14 <br /> 12/22/87 1193 -- 38 00 -0 14 <br /> 3/24/88 1258 3735 -0 65 <br /> 6/23/88 11 17 -- 38 76 141 <br /> 9/29/88 1223 -- 3770 -106 <br /> 2/22/89 1182 -- 3811 0.11 <br /> 6129189 <br /> 9/18/89 12 19 - 3774 -037 <br /> 12/28/89 1201 -- 3792 0 18 <br /> 4/18/90 12 15 -- 3778 -014 <br /> 10/16/90 1235 -- 3758 -020 <br /> 10/19/90 1228 -- 3765 0 07 <br /> 1110/91 120l 3792 027 <br /> 4/10/91 1182 38 It 0 19 <br /> 7110191 1223 -- 3770 -041 <br /> 9124191 12 57 -- 3736 -034 <br /> 1123/92 12 12 -- 37 81 045 <br /> 4/20/92 11 93 38 00 0 19 <br /> 7/8/92 1222 -- 3771 -0 29 <br /> 10/7/92 1238 -- 3755 -0 16 <br /> 1118/93 11 22 38 71 1 16 <br /> 4/14/93 1149 3844 -027 <br /> 8/30/93 1243 37 50 -094 <br /> 10/27/93 1239 -- 3754 0 04 <br /> 2/18/94 12 00 -- 3793 039 <br /> 5120/94 1207 -- 37 86 -007 <br /> 10/7/94 1238 Sheen 3755 -031 <br /> Al R-4 <br /> 4/23/87 4903 1085 -- 38 18 <br /> 12/22/87 1 100 -- 38 03 -0 15 <br /> 3/24/88 10 98 -- 38 05 0 02 <br /> 6/23188 12 I 1 -- 3692 -1 13 <br /> 9/29/88 1072 3831 1 39 <br /> 2/22/89 1091 -- 38 12 -0 19 <br /> 6129/89 11 00 -- 38 03 -009 <br /> 9/18/89 it 19 -- 37 84 -0 19 <br /> 12/28/89 11 08 -- 3795 0 11 <br /> 4118/90 11 25 3778 -0 17 <br /> 10/16/90 It 38 -- 3765 -0 13 <br /> 1/10/11 11 16 -- 37 87 022 <br />