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TABLE 4 <br /> SUMMARY OF COPCs IN SOIL <br /> MOUNTAIN HOUSE DEVELOPMENT SITE#6 <br /> Mountain House,San Joaquin County,California <br /> Maximum <br /> Number of Number of Detected EPC Cs <br /> COPC Soil Samples Detects Concentration (mg/kg) Statistical Method' <br /> BTEX <br /> Benzene 49 1 0.20 0.0005 Median <br /> Eth lbenzene 49 2 0.061 0.055 95%KM t UCL <br /> Total Xylenes 49 1 0.20 0.001 Median <br /> PAHs <br /> Acenaphthene 49 6 2.5 0.47 95%KM t UCL <br /> Acenaphthylene 49 4 0.77 0.19 99%KM Cheb shev UCL <br /> Anthracene 49 6 2.9 0.17 95%KM t UCL <br /> Benza a anthracene 49 4 0.22 0.21 95%KM Percentile Bootstrap)UCL <br /> Benzo(a)pyrene 49 9 0.29 0.041 95%KM t UCL <br /> Benzo b fluoranthene 49 8 0.49 0.052 95%KM t UCL <br /> Benzo(g,h,i)perylene 49 6 0.47 0.033 95%KM t UCL <br /> Benzo k fluoranthene 49 7 0.21 0.047 95%KM Percentile Bootstrap)UCL <br /> Ch Bene 49 13 1.8 0.68 99%KM Cheb shev UCL <br /> Dibenz a,h anthracene 49 6 0.080 0.034 95%KM Percentile Bootstrap)UCL <br /> Fluoranthene 49 10 0.77 0.079 95%KM t UCL <br /> Fluorene 49 9 6.0 0.66 95%KM t UCL <br /> Indeno 1,2,3-cd rene 49 2 0.050 0.016 99%KM Cheb shev UCL <br /> Naphthalene 49 11 0.83 0.33 99%KM Cheb shev UCL <br /> Phenanthrene 49 10 16 4.0 99%KM Cheb shev UCL <br /> Pyrene 49 8 3.1 0.27 95%KM t UCL <br /> Abbreviations: <br /> BCA=Bias-corrected accelerated bootstrap <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 kilogram <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> t=Student's t-distribution <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 /> W" i ii <br /> __Wrr5i% <br /> Fr,i,47 Sr.n;nr.e!0 5'c�a f rr..vs <br /> Page 1 of 1 <br />