Presents an approach for identifying and selecting appropriate performance specifications for design, implementation, and monitoring of S/S remedies.

A comprehensive resource incorporating elements from previous documents and providing updates on additional types of reactive media, treatable contaminants, longevity issues, and new construction/installation approaches and technologies. Revised 11-30-11.

Provides a decision framework incorporating key aspects of EPA’s three-volume technical background series on MNA for metals and rads in groundwater, guidance on approaches and key issues associated with evaluating attenuation-based remedies, and a process to incorporate enhanced attenuation.

Summarizes the concepts underlying mass flux and discharge, their potential applications, and case studies of the uses of these metrics.

Updates and replaces PHYTO-1 and PHYTO-2, merging their concepts with new, practical information on the process and protocol for selecting and applying various phytotechnologies as remedial alternatives.

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.

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

Presents six critically reviewed case studies of recent or ongoing applications ISB of DNAPLs as evidence that it is a viable cleanup strategy. A companion CD contains the document and presentations made at the Case Studies Forum.