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TABLE 6 <br /> SUMMARY OF COPCs IN SOIL <br /> US CAN-WELTY ROAD <br /> 35275 Welty Road <br /> Vernalis, California <br /> Maximum <br /> Detected <br /> Number of Number of Concentration EPC,Cs <br /> COPC Soil Samples Detects (mg/kg) (mg/kg) Statistical Method' <br /> BTEX <br /> Benzene 77 2 0.47 0.0050 Median <br /> Toluene 77 10 0.4 0.033 95%KM t UCL <br /> Eth lbenzene 77 12 48.8 3.3 95%KM t UCL <br /> Total Xylenes 77 12 87 9.5 97.5%KM(Chebyshev)UCL <br /> PAHs <br /> Acenaphthene 51 1 0.18 0.00067 Median <br /> Anthracene 51 6 0.48 0.11 99%KM(Chebyshev)UCL <br /> Benzo(a)anthracene 51 6 0.037 0.0061 95%KM(Chebyshev)UCL <br /> Benzo(a)pyrene 51 6 0.04 0.0063 95%KM(Chebyshev)UCL <br /> Benzo(b)fluoranthene 51 8 0.084 0.013 95%KM(Chebyshev)UCL <br /> Benzo(g,h,i)perylene 51 4 0.011 0.0018 95%KM t UCL <br /> Benzo(k)fluoranthene 51 1 0.0005 0.00067 Median <br /> Chrysene 51 9 1.9 0.44 99%KM(Chebyshev)UCL <br /> Dibenz(a,h)anthracene 51 1 0.011 0.00067 Median <br /> Fluoranthene 51 6 2.8 0.65 1 99%KM(Chebyshev)UCL <br /> Fluorene 51 3 9.6 0.61 95%KM t UCL <br /> Indeno(1,2,3-cd)pyrene 51 2 0.0005 0.00067 Median <br /> Naphthalene 51 6 15 3.6 99%KM(Chebyshev)UCL <br /> Phenanthrene 51 15 9.8 2.3 99%KM(Chebyshev)UCL <br /> Pyrene 51 6 0.22 0.067 99%KM(Chebyshev)UCL <br /> Abbreviations: <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> COPC=Constituent of potential concern <br /> Cs=Concentration in soil,mg/kg <br /> EPC=Exposure point concentration <br /> KM=Kaplan-Meier nonparametric estimation method <br /> mg/kg=Milligrams per kilogram <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> UCL=Upper confidence limit <br /> Note: <br /> 1. ProUCL Version 4.00.05 was used to calculate exposure point concentrations;where the software identified more than one <br /> appropriate UCL value,the higher value was used in this evaluation.When the detection frequency is very low(<4 to 5 percent), <br /> it may not be possible to calculate a UCL.In these cases,the sample median was selected as the EPC as recommended in the <br /> ProUCL User Guide. <br /> Page 1 of 1 SAIC <br />