Part I: Analysis and Testing: Analysis of Petroleum Contaminated Soil and Water: An Overview (T.L. Potter). Fingerprinting Petroleum Products: Unleaded Gasolines (T.L. Potter). Differentiation of Crude Oil and Refined Petroleum Products in Soil (A.L. Baugh and J.R. Lovegreen). Onsite Analytical Screening of Gasoline Contaminated Media Using a Jar Headspace Procedure (J. Fitzgerald). Relationships between Chemical Screening Methodologies for Petroleum Contaminated Soils: Theory and Practice (S.A. Denahan, B.J. Denahan, W.G. Elliott, W.A. Tucker, M.G. Winslow, and S.R. Boyes). Electrochemiluminescent Sensing of Petroleum Contamination at Trace Levels (B.G. Dixon, J. Sanford, and B.W. Swift). Why TCLP, EP-Tox, and the California WET Do Not Derive Data on the Mobility and Transformation of Metals in Soil Systems (J. Dragun, J.H. Barkach, and S. A. Mason). Part II: Environmental Fate and Modeling: Bioremediation of Petroleum Products in Soil (C.J. Englert, E.J. Kenzie, and J. Dragun). Mathematical Hydrocarbon Fate Modeling in Soil Systems and Other Media (M. Bonazountas and D. Kallidromitou). Petroleum Contaminated Soil: Chemistry and Modeling (S.C. Lee, L. Eastcott, W.Y. Shiu, and D. Mackay). The Utility of Environmental Fate Models to Regulatory Programs (M. A. Callahan). Part III: Remediation: An Evaluation of Organic Materials That Interfere with Stabilization/Solidification Processes (M. John Cullinane, Jr. and R.M. Bricka). Incorporation of Contaminated Soils into Bituminous Concrete (K. Eklund). Additive Stabilization of Petroleum Contaminated Soils (S. Pamukcu). In Situ Vitrification Applications (J.E. Hansen and C.L. Timmerman). Field Studies on In Situ Soil Washing (J.H. Nash and R.P. Traver). Land Treatment of Hydrocarbon Contaminated Soils (J. Lynch and B.R. Genes). Low Temperature Stripping of Volatile Compounds (L.A. Velazquez and J.W. Noland). Barrier Walls to Contain Contaminated Soils (M.D. Boscardin and D.W. Ostendorf). In Situ Biological Remediation of Petroleum Hydrocarbons in Unsaturated Soils (D. Dineen, J.P. Slater, P. Hicks, J. Holland, and L.D. Clendening). Estimate for Hydrocarbon Vapor Emissions Resulting from Service Station Remediations and Buried Gasoline-Contaminated Soils (P.C. Johnson, M.B. Hertz, and D.L. Byers). Letting the Sleeping Dog Lie: A Case Study in the No-Action Remediation Alternative for Petroleum Contaminated Soils (E.C. Henry and M.E.F. Hansen). Part IV: Health Assessment: A Proposed Approach to Regulating Contaminated Soil: Identify Safe Concentrations for Seven of the Most Frequently Encountered Exposure Scenarios (D.J. Paustenbach, R. Kalmes, J.D. Jernigan, R. Bass, and P. Scott). Review of Present Risk Assessment Models for Petroleum Contaminated Soils (P.T. Kostecki, E.J. Calabrese, and H.M. Horton). Creative Approaches in the Study of Complex Mixtures: Evaluating Comparative Potencies (R.S. Schoeny). The Effect of Soil Type on Absorption of Toluene and Its Bioavailability (R.M. Turkall, G.A. Skowronski, and M.S. Abdel-Rahman). A Preliminary Decision Framework for Deriving Soil Ingestion Rate (E.J. Calabrese, E.S. Stanek, and C.E. Gilbert).