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Table 1. Summa of Groundwater Monitorin D • <br /> i'Y g Data: Water Elevations and Analyses <br /> ARCO Facility 2093, Tracy, California <br /> Floating Change Concentrations inµg/L in. <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 Xylenes TPH-G MTBE DO <br /> 2/18194 902 -- 3806 034 04 05 <03 <05 <10 -- <br /> 5/20/94 906 -- 3802 -004 <0 3 <0 3 <0 3 <0 5 <10 <br /> 10/7/94 '- <br /> 12/16/94 <br /> -- -- -- -- -- <br /> 2/28/95 -- -- -- -- -- -- -- -- -- <br /> 4/25/95 <br /> 4/26195 -- <br /> 7/27/95 -- -- -- — -- -- -- <br /> 10/26/95 -- <br /> 2/12/96 8 85 -- 3823 -- <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/18196 922 -- 3786 -037 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7/18/96 9 53 -- 3755 -031 <0 5 <0 5 <0 5 <0 5 <50 <5 + <br /> 11/15/96 1000 -- 3708 -047 <0 5 <0 5 <0 5 <0 5 <50 <5 <br /> 3/14197 10 11 -- 3697 -011 <0 5 <0 5 <0 5 <0 5 <50 -- 009 <br /> 614/97 NP 9.34 — 3774 0.77 <0 5 <0 5 <0 5 <0 5 <50 <2 5 0 12 <br /> SMW-1 5024 <br /> I017/94 1286 -- 3738 -- 250 110 <0 5 360 2200 <br /> 12/16/94 1254 -- 3770 032 740 210 330 600 5200 <br /> 2/28/95 1240 -- 37 84 0 14 I000 330 450 790 8300 <br /> 4/26/95 1271 -- 3753 -031 470 110 270 480 5100 <br /> 7/27195 1300 -- 3724 -029 410 42 360 630 7400 <br /> 10/26/95 (c) 13 03 -- -- -003 <br /> 10/27/95 -- -- -- 640 33 440 410 7600 -- <br /> 2112/96 1200 -' -- -- 390 <0 5 220 98 3800 -- <br /> 4/18/96 1258 -- -- -058 60 <0 5 20 7 4 500 <br /> 7/18/96 12 85 -- -027 200 <5 130 56 3400 60 <br /> 11/15/96 13 40 -- -- -055 180 <2 5 62 21 2500 590 <br /> 3/14/97 1335 -- -- 0 05 130 <0 5 <0 5 <0 5 1700 230 0 13 <br /> 6/4197 NP 1273 -- — 0.62 36 3 1 14 1.5 520 47 0 05 <br /> TEX-1 (c) <br /> 10/26/95 12 86 -- __ __ <5 <0 5 <0 5 <0 5 <350 <br /> 2/12/96 1090 -- - 196 <br /> 4/18196 1135 -- -- -045 <0 5 <0 5 < <br /> 0 5 <0 5 <50 <br /> 4747\TABt,E5120931UN7 XU% <br />