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^ Introduction Purpose and Scope5 Acknowledgments_^ Methods^ Site Selection  Sample Collection and Analysis8 Statistical Analysis of Uncensored Polynuclear Aromatic Hydrocarbon Data  10 Population Tests10 Test for Lognormal Distribution 11 Graphical Analysis11 Descriptive Statistics 11 Outlier Test^ 95th Percentile, 95-Percent Confidence Interval for the Mean, and Geometric Mean 11 Relation Between Polynuclear Aromatic Hydrocarbon Concentrations and Land Use11 Simple Linear Regression12 Unbalanced One-Way Analysis of Variance 12 Geospatial Analyses of Benzo(a)pyrene Concentrations 13 Statistical Analysis of Censored Polynuclear Aromatic Hydrocarbon Data 13 Graphical Analysis13 Descriptive Statistics 14 Outlier Test14 Relation Between Polynuclear Aromatic Hydrocarbon Concentrations and Land Use14 Correlation of Polynuclear Aromatic Hydrocarbon and Inorganic Concentrations14 Analysis of Polynuclear Aromatic Hydrocarbon Data15 Analysis of Inorganic Data25 Summary and Conclusions26 References Cited^ Appendixes: 1. Polynuclear Aromatic Hydrocarbons in Ambient Surface Soils, Chicago, Illinois61 2. Inorganic Constituents in Ambient Surface Soils, Chicago, Illinois67

Concentrations of polynuclear aromatic hydrocarbons and inorganic constituents in ambient surface soils, Chicago, Illinois: 2001-02