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0 0 0 Table 1. Summary of Groundwater Monitoring Data- Water Elevations and Analyses ARCO Facility 2093, Tracy, California Floating Change Concentrations inµg/l- m Tog-of-casing Depth-to- product Water-leA el since last Well number elevation, water, thickness elevation, measurernenl, Total and date to feet (a) in feet in feet in feet(b) in feet Benzene Toluene Eth (benzene Xylenes TPH-G MTBE DO 7118196 1011 -- -- 2 05 4 8 <0 5 <0 5 <0 5 280 l4 11/15/96 -- -- -- -_ -- 3114/97 NP 10 94 -- -- <0 5 <0 5 <0 5 <0 5 <50 <2 5 0 15 614197 NP 10 26 -- -- -0 68 2 7 <0 5 <0 5 <0 5 97 <2 5 0 17 8/11/97 NP i0 44 -- -- 0 18 3 4 060 <0 5 <0 5 220 6 9 062 11/17/97 NP 1050 -- 006 2 8 065 <0 5 <0 5 190 51 -- ATR-6 3/10189 4935 -- -- -- <0 5 <0 5 <0 5 <0 5 <200 6/21189 11 54 -- 37 81 -- <0 3 <0 3 <0 3 0 3 <50 -- 9118/89 11 60 -- 3775 006 0 5 1 3 0 3 3 8 <SU -- 12/27/89 11 57 -- 37 78 -0 03 <0 3 <0 3 <0 3 0 4 <50 -- 4/18/90 11 68 -- 3767 0 11 19 2 4 0 6 5 <SD -- 10/16/90 ._ -- -- -- -' -- <0 5 <0 5 <O 5 <0 5 <50 10/19/90 11 80 -- 3755 -_ -- 1110/91 11 64 -- 3771 -0 16 <0 5 <0 5 <0 5 <0 5 <50 '- 4/10/91 11 52 -- 37 83 -0 12 <0 5 <0 5 <0 5 <0 5 <50 -- 7/10191 11 76 -- 3759 0 24 <0 5 <0 5 <0 5 <0 5 <50 -- 9124/91 11 95 -- 37 40 0 19 <0 5 <0 5 <0 5 <0 5 <50 -- 1/23192 1166 3769 -029 <0 5 <0 5 <0 5 <0 5 <50 -- 4/20/92 1156 -- 3779 -0 10 __ -- 4/21/92 4/21192 -- -- <0 5 <0 5 <0�5 <0 5 <50 -- 7/8/92 1172 -- 3763 -- <0 5 <0 5 <0 5 <0 5 <50 - -- 10/7192 1182 -- 37 53 0 10 <0 5 <0 5 <0 5 <0 5 <50 - -- 1118193 1104 38 31 -0 78 <0 5 <0 5 <0 5 <0 5 <50 -- 4/14/93 1142 -- 3793 0 38 75 <0 5 <0 5 <0 5 310 8/31193 -- __ 10/27/93 1184 -- 3751 -- <0-5 <0 5 <0 5 <0 5 <50 -- 17194 -- -- -- __ -- -- -- -- -- -- -- 5/20/94 .- -- 10/7/94 1185 37 50 -_ <0 5 <0 5 <0 5 <0 5 <50 -- 12/16/94 1154 -- 3781 -031 <0 5 <0 5 <0 5 <0 5 <50 ^. w 2128/95 1165 -- 3770 0 11 <0 5 <0 5 <0 5 <0 5 <50 4/26/95 7/27/95 4747UABLES12093N0V7 ALS