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• 0 • <br /> Table 1. Summary of Groundwater Monitoring Data: Water Elevations and Analyses <br /> ARCO Facility 2093, Tracy, California <br /> Floating Change Concentrations in pg/L m <br /> Top-of-casing Depth-to- product Water-level since last <br /> Well number elevation, water, thickness elevation, measurement, Total <br /> and date in feet a) in feet in feet In feet(b) In feet Benzene Toluene Eth (benzene X lenes TPH-G MTBE DO <br /> 11/15/96 940 -- 3658 -045 110 130 240 1300 52000 <200 -- <br /> 3/14/97 NP 924 -- 3674 0 16 4 2 <0 5 16 26 350 <2 5 0 10 <br /> 6/4/97 NP 869 -- 3729 055 42 5 2 8 2 150 1200 <2 5 003 <br /> 8/11197 NP 9 10 -- 3688 -0 41 280 75 140 710 7800 <25 015 <br /> ATR-9 <br /> 10/16/90 4968 -- __ <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/19/90 11 11 -- 3757 <br /> 1/10191 1104 -- 3764 0 07 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4/10/91 10 82 -- 3786 022 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 7/10/91 1106 -- 3762 -024 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 9/24/91 1129 -- 3739 -0 23 <br /> 9/25/91 -- -- __ __ <0 5 <0 5 <0 5 <0 5 <50 <br /> 1/23/92 1096 -- 3772 -- <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4120/92 1088 -- 3780 008 <br /> 4/21/92 -- -- -- -- <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 7/8/92 1106 -- 3762 -- <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/7/92 11 16 -- 3752 -0 10 <0 5 <0 5 <0 5 <0 5 <50 <br /> 1118/93 1034 -- 3834 082 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4114/93 I0 70 -- 3798 -036 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 8/30/93 11 17 3751 -047 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/27/93 1123 -- 3745 -006 <0 5 <0 5 <0 5 0 7 <50 -- -- <br /> 2/17/94 1089 -- 3779 034 <br /> 2/18194 -- -- -- -- <0 3 0 4 <0 3 <0 5 <10 -- -- <br /> 5/20/94 1097 3771 <0 3 <0 3 <0 3 <0 5 <10 -- <br /> 10/7/94 11 19 -- 3749 -022 <0 5 <0 5 <0 5 <0 5 <50 <br /> 12/16/94 1091 -- 3777 028 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 2/28/95 1093 -- 3775 -002 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4125195 1146 -- 3722 -053 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 7/27195 1173 -- 36 95 -0 27 <br /> 10/26/95 1180 -- 36 88 -007 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 2/12/96 1090 -- 3778 090 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4118196 1130 -- 3738 -040 <br /> 7119196 1168 -- 3700 -038 <0 5 <0 5 <0 5 <0 5 <50 <5 -- <br /> 11/15/96 1223 -- 3645 -055 <br /> 474711 ABLESM93AUG?XLS <br />