Provides a systematic understanding of the technical and related regulatory considerations for ISB of chlorinated ethene DNAPL source zones, based on scientifically sound and credible evidence. CD includes BIODNAPL-2.

Provides direction to regulators and practitioners on integrating EA into remedial decision making for a smooth transition between aggressive remediation and monitored natural attenuation. The CD also contains the Enhanced Attenuation of Chlorinated Organics: Electronic Resource Guide.

Reviews technologies for remediating perchlorate contamination in water and soil, as well as barriers to their deployment, providing guidance to help streamline processes for selecting and implementing them.

Compiles knowledge and experience acquired in recent years from facilities that have completed a D&D process, providing guidance on D&D to regulators, the public, project managers, cleanup contractors, and technology providers.

Explains the performance-based environmental management process concepts and components and discusses regulatory and stakeholder perspectives.

Complements SCM-1 by providing guidance for environmental organizations that want to implement the EPA Triad process into their business practices.

Provides guidance on how to properly deploy and collect samples using five passive sampling technologies.

Provides a generalized framework for evaluating the vapor intrusion pathway and describes the various tools available for investigation, data evaluation, and mitigation.

Describes a method for evaluating post-closure care performance—a systematic and hierarchical evaluation of leachate, landfill gas, groundwater, and the final cap—based on criteria established for a defined end-use strategy.

Discussion of sources, contamination, analytical methodologies, toxicological issues and research, remediation technologies, and regulatory status of perchlorate.