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TABLE 6 <br /> SUMMARY OF COPCs IN SOIL <br /> FORMER VERNALIS PUMP STATION <br /> Vernalis,San Joaquin and Stanislaus Counties,California <br /> Maximum <br /> Number of Number of Detected EPC,Cs <br /> COPC Soil Samples Detects Concentration (mg/kg) Statistical Method' <br /> BTEX <br /> Toluene 67 10 0.57 0.035 95%KM t UCL <br /> Eth lbenzene 67 1 0.96 0.005 Median <br /> Total Xylenes 67 4 3.4 0.42 97.5%KM Cheb shev UCL <br /> PAHs <br /> Acenaphthene 67 1 1.7 0.005 Median <br /> Benzo(a)anthracene 67 3 0.38 0.057 97.5%KM Cheb shev UCL <br /> Benzo(a)pyrene 67 3 0.022 0.0081 95%KM t UCL <br /> Benzo b fluoranthene 67 6 0.021 0.0083 95%KM(Percentile Bootstrap)UCL <br /> Benzo(g,h,i)perylene 67 6 0.019 0.011 95%KM Percentile Bootstrap)UCL <br /> Benzo k fluoranthene 67 1 0.007 0.005 Median <br /> Chrysene 67 9 1 0.086 95%KM Cheb shev UCL <br /> Dibenz a,h anthracene 67 1 0.006 0.005 Median <br /> Fluoranthene 67 5 0.29 0.036 95%KM Cheb shev UCL <br /> Fluorene 67 1 4.2 0.005 Median <br /> Indeno 1,2,3-cd ene 67 3 1 0.008 1 0.0080 1 95%KM Percentile Bootstrap)UCL <br /> Naphthalene 67 2 7.3 1.1 97.5%KM Cheb shev UCL <br /> Phenanthrene 67 6 6.5 0.76 97.5%KM Cheb shev UCL <br /> Pyrene 67 6 0.62 0.059 95%KM(Chebyshev)UCL <br /> Abbreviations: <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> COPCs=Constituents of potential concern <br /> Cs=Concentration in soil <br /> EPC=Exposure point concentration <br /> KM=Kaplan-Meier nonparametric estimation method <br /> mg/kg=Milligrams per kilograms <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> UCL=Upper confidence limit <br /> <=Less than <br /> %=Percent <br /> Note: <br /> 1. ProUCL Version 4.00.04 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 is used as the EPC as suggested in the ProUCL User Guide. <br /> ag�— The Benham CompaniMLLC <br /> .W<L.P A Who"ned 5uWdlary <br /> Page 1 of 1 Fr SO—In SPO H-5 <br />