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Table ]. Water-Level Elevations <br /> ARCO Station 2093, Tracy, California <br /> Top-of-Casing Depth to Groundwater Change since <br /> Well No and Elevation Water Elevation Last Measurement <br /> date (feet) (a) (feet) (feet) (feet) <br /> ATR-1 <br /> 4123187 5058 1249 3809 - <br /> 12/22/87 1263 3795 -014 <br /> 3/24/88 1254 3804 009 <br /> 6123/88 1283 3775 -029 <br /> 9/29/88 1301 3757 -0 I8 <br /> 2/22/89 1246 38 12 055 <br /> 6/21189 1237 3821 009 <br /> 9/18/89 1288 3770 -051 <br /> 12/27/89 1268 3790 020 <br /> 4118/90 1284 3774 -0 16 <br /> 10/16/90 - - - <br /> 10/19/90 13 10 3748 - <br /> 1/l0/91 1278 3780 032 <br /> 4110191 1252 3806 026 <br /> 7110191 1295 3763 -043 <br /> 9/24/91 1330 3728 -035 <br /> 1/23/92 1277 3781 053 <br /> . 4120192 1258 3800 0 19 <br /> 7/8/92 1290 3768 -032 <br /> 1017192 1309 3749 -019 <br /> 1/18/93 (b) -- -- <br /> 4114/93 12 31 3827 -- <br /> 8/30/93 13 18 3740 -087 <br /> 10/27/93 13 13 3745 005 <br /> A'1 R-2 <br /> 4/23/87 4922 11 28 3794 - <br /> 12/22/87 1140 3782 -0 12 <br /> 3124188 11 35 3787 005 <br /> 6/23/88 11 55 3767 -020 <br /> 9/29/88 11 71 3751 -0 16 <br /> 2/22/89 11 35 3787 036 <br /> 6/21/89 11 45 3777 -010 <br /> 9/18/89 11 65 3757 -020 <br /> 12/27/89 11 50 3772 0 15 <br /> 4/18190 11 64 3758 -0 14 <br /> 10/16/90 1 1 81 3741 -0 17 <br /> 10/t9/90 I t 81 3741 000 <br /> 1/l0/91 11 58 3764 023 <br /> 4110/91 1 135 3787 023 <br /> 7/10/91 11 74 3748 -039 <br /> 9/24/91 1202 3720 -028 <br /> 1/23/92 1160 37 62 042 <br /> 4120192 11 53 3769 007 <br /> 718/92 11 75 3747 -022 <br />