chapter 1 Problems of Contaminant Hydrology in Siberia -- chapter 2 Direct Measurements of Air Distribution during in Situ Air Sparging -- chapter 3 Subsurface Barrier and Recovery Trench for Contaminant Removal: Naval Arctic Research Laboratory Point Barrow, Alaska -- chapter 4 Strategies for Development of Cost-Effective Amelioration Procedures for Oil Spills in Cold Regions -- chapter 5 Basis Guidelines for Conducting Groundwater Modeling Efforts to Meet Environmental Requirements -- chapter 6 Hydrogeoecological Problems in Developing the Diamond-Bearing Deposits in Northern Regions of Russia -- chapter 7 Application of Freezing for Concentrating Solutes in Liquid Radioactive Waste Solutions -- chapter 8 Feasibility and Computer Model Studies of Isolation of Radioactive Wastes in Perennially Frozen Bedrock -- chapter 9 Permafrost and Stratigraphic Layer Identification Using a Hierarchical Neural Network for Interpretation of Ground-Penetrating Radar -- chapter 10 Permeability of Frozen Silt to Organic Contaminants -- chapter 11 A Pore-Scale Model for Soil Freezing -- chapter 12 Sensible Heat Exchange during Snowmelt -- chapter 13 Retention Kinetics of Heavy Metals in Soils: Modeling Approaches -- chapter 14 Measurements and Modeling of Benzene Transport in a Discontinuous Permafrost Region.