State of the art information on in situ treatment technologies for hazardous waste-contaminated soils is presented. Describes for each technology: wastes amenable to treatment, ease of application, potential level of treatment available, reliability, secondary impacts and equipment and reagents required.Part I: Technology Descriptions Introduction Legislative and Regulatory Overview Technologies for In Situ Treatment Delivery and Recovery Systems References Appendix A: Modification of Soil Properties Part II: Background Information Introduction Monitoring Characterization and Evaluation of Fundamental Processes in Soil/Waste Systems References Appendix A: Parameters for Assessing Soil/Waste InteractionState of the art information on in situ treatment technologies for hazardous waste-contaminated soils is presented in this book.