Natural Attenuation of Hazardous Wastes provides the regulatory framework, scientific and engineering principles, and applications of natural attenuation for the remediation of contaminated sites. Natural attenuation (NA) is a process that relies on the natural assimilative capacity of the site to reduce or stabilize contaminates to desirable levels. Described in detail are the sites contaminated with petroleum hydrocarbons and MTBE, chlorinated solvents, polycyclic aromatic hydrocarbons, metals, and radioactive wastes. Natural attenuation is increasingly becoming a popular, cost effective remedial alternative for many contaminated sites. Environmental engineers and scientists will find this book full of information on basic principles to summaries of natural attenuation applications. Topics include: major pollutants; extensive review of literature; examples of applications of natural attenuation; site characterization and monitoring requirements and procedures; and basic scientific principles on physical, chemical, and biological processes.