1. Introduction -- 2. The Soil Environment -- 3. Fate and Transport -- 4. Microbial Ecology -- 5. Metabolism and Energy Production -- 6. Biodegradation of Selected Compounds -- 7. In Situ Treatment -- 8. Solid-Phase Bioremediation -- 9. Slurry-Phase Bioremediation -- 10. Vapor-Phase Biological Treatment -- App. C. Constants and Conversion Factors -- App. D. Physical Properties of Water -- App. E. Properties of Common Contaminants -- App. F. Composition of Gasoline -- App. G. Moisture and Energy Balances