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• 0 0 <br /> Table 1. Summary of Groundwater Monitoring Data: Water Elevations and Analyses <br /> ARCO Facility 2093, Tracy, California <br /> Floating Change Concentrations inµg1L m <br /> Top-of-casing Depth-to- product Water-level since last <br /> Well number elevation, water, thickness elevation, measurement, Total <br /> and date to feet(a) in feet in feet in feet(b) in feet Benzene Toluene Eth °Ibenzene Xylenes TPH-G MTBE DO <br /> ATR-1 <br /> 4/23187 5058 1249 -- 38 09 -- <0 5 <0 5 <0 5 23 <100 <br /> 12/22/87 12 63 -- 3795 0 14 5 9 <0 5 0 9 <0 5 <br /> 3/24/88 1254 -- 3804 -009 <0 5 <0 5 <0 5 <0 5 <br /> 6/23188 12 83 -- 3775 029 <0 5 13 4 3 2 2 - <br /> 9/29/88 1301 -- 37 57 0 18 <0 5 <0 5 <0 5 <0 5 -- <br /> 2122189 1246 -- 38 12 -055 14 <0 5 <0 5 1 8 <100 <br /> 6/21/89 12 37 -- 3821 -009 360 08 2 1 36 520 -- -- <br /> 9/18/89 1288 3770 051 250 1200 570 7100 27000 -- <br /> 12/27/89 1268 -- 3790 -020 3 4 <0 3 1 3 14 <50 -- <br /> 4/18/90 12 84 3774 0 16 21 1 5 16 16 13 -- <br /> 10/16/90 -- -- -- -- 1 <0 5 2 2 <50 -- -- <br /> 9 90 13 10 -- 3748 -- -- -- -- <br /> 1/10/91 1278 -- 3780 -0 32 2 4 <0 5 5 7 2 3 <50 -- -- <br /> 4/10191 1252 -- 3806 -026 13 <0 5 4 8 <0 5 73 - <br /> 7/10/91 12 95 3763 043 2 <0 5 4 7 17 90 - <br /> 9124/91 13 30 -- 37 28 035 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/23/92 12 77 -- 3781 -0 53 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4120/92 1258 -- 3800 -0 19 <0 5 <0 5 <0 5 <0 5 <50 - -- <br /> 7/8/92 1290 -- 3768 032 <0 5 <0 5 0 6 <0 5 <50 -- -- <br /> 10/7192 1309 -- 3749 0 19 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/18/93 _ -- -- <br /> 4/14/93 1231 -- 3827 -- <0 5 <0 5 1 5 <0 5 <50 -- -- <br /> 8130/93 13 18 -- 3740 0 87 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/27/93 13 13 -- 3745 -005 <0 5 <0 5 <0 5 <0 5 <50 <br /> 2/18/94 1265 37 93 -048 0 6 1 1 0 8 17 _- <br /> 5/20/94 1271 -- 3787 0 06 0 6 0 3 14 <0 5 27 - -- <br /> 10/7/94 13 14 3744 043 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 12/16/94 12 74 -- 3784 -040 <0 5 <0 5 <0 5 <0 5 <50 - <br /> 2/28/95 1265 -- 3793 -009 <0 5 <0 5 1 <0 5 <50 -- -- <br /> 4/26/95 1290 3768 025 <0 5 <0 5 <0 5 <0 5 <50 - <br /> 7/27/95 1322 -- 37 36 032 -- <br /> 10/26/95 1340 -- 37 18 0 18 -- -- __ -- <br /> 10/27/95 -- -- -- -- <0 5 <0 5 <0 5 <0 5 <50 <br /> 2112196 1230 -- 3828 -- <0 5 <0 5 2 2 <0 5 120 -- -- <br /> 4747/TABLU.%I2093NOV7 XLS <br />