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Table 3. Analytical Results for <br /> ARCO Facility 2093, Tracy, California <br /> Monitoring well <br /> number and Concentrations in 4g/L <br /> date•sam led Benzene Toluene I Eth (benzene Xylenes TPH-G (a) <br /> ' 1/10/91 <0.5 <0.5 <0.5 <0.5 <50 <br /> 4110191 <0.5 <0.5 <0.5 <0.5 <50 <br /> 7112191 <0.5 <0.5 <0.5 <0.5 <50 <br /> 9125191 <0.5 <0.5 <0.5 <0.5 <50 <br /> 1123192 <0.5 <0.5 <0.5 <0.5 <50 <br /> 4/21192 <0.5 <0.5 <0.5 <0.5 <50 <br /> 718192 <0.5 <0.5 <0.5 <0.5 <50 <br /> 1017192 <0.5 <0.5 <0.5 <0.5 <50 <br /> 1118193 <0.5 <0.5 <0.5 <0.5 <50 <br /> 4/14/93 <0.5 <0.5 <0.5 <0.5 <50 <br /> 8131193 <0.5 <0.5 <0.5 <0.5 <50 <br /> 10/27/93 <0.5 <0.5 <0.5 <0.5 <50 <br /> 2/18194 0.4 0.5 <0.3 <0.5 <10 <br /> 5120194 <0.3 <0.3 <0.3 <0.5 <10 <br /> 10/7/94(i) <br /> 12/16/94(i) <br /> 2/28195 (i) -- -- -- -- -- <br /> 4/26/95(i) <br /> 7127195 (i) <br /> I0/26/95 (i) <br /> 2/12/96 <0.5 <0.5 <0.5 <0.5 <50 <br /> SMW-1 <br /> 1017194 250 110 ' <0.5 360 2200 <br /> 1.2/16/94 740 210 330 600 5200 <br />' 2/28/95 1000 330 450 790 i 8300 <br /> 4126195 470 110 270 480 15100 <br /> 7/27195 410 42 360 630 7400 <br /> 10/27/95 640 33 440 410 7600 <br /> V17/96 390 <0.5 220 98 3800 <br /> TEX-1 <br /> 10/26/95 <5(e) <0.5 <0.5 <0.5 X350(g) <br /> 2/12/96 ') -- -- -- -- -- <br /> (a)Total petroleum hydrocarbons as gasoline. <br /> (b)Well could not be located due to recent parking lot repaving. <br /> (c)Well is on a semi-annual sampling schedule.. ' <br /> (d)Not sampled due to presence of free product. <br /> (e)Raised method reporting limit due to high analyte concentration requiring sample dilution. <br /> (f)The chromatogram does not match the typical gasoline fingerprint. <br /> (g)Raised method reporting limit due to matrix interference. <br /> (h)Not sampled. Well was inaccessible,due to on-site construction activities. <br /> (i) Unable to open well box lid. <br /> 0) Soil vapor extraction well-not sampled. <br /> Note dashes indicate not analyzed or sample not collected. <br /> r <br />