Guidance to develop a structured approach for managing sites contaminated with chlorinated solvents and dense nonaqueous phase liquids.

Provides tools for selecting and applying appropriate approaches for integrated site characterization and remediation at sites contaminated with dense nonaqueous phase liquids.

Guidance to help site managers develop and adapt integrated strategies for understanding, treating, monitoring, and evaluating complex sites contaminated with dense nonaqueous phase liquids.

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

Provides the technical and related regulatory considerations for in situ bioremediation of chlorinated ethene dense nonaqueous phase liquids source zones.

Six critically reviewed case studies of recent or ongoing applications of in situ bioremediation at sites with dense nonaqueous phase liquid source zones.

Technological overview of in situ bioremediation and some of the issues to consider when selecting and designing an in situ bioremediation system for remediation of chlorinated ethene dense nonaqueous phase liquids source zones.

Presents approaches to performance monitoring of various in situ technologies for the treatment of dense nonaqueous phase liquid source zones.

Discusses scientific approaches and strategies used to characterize sites that are known or suspected to be contaminated with dense nonaqueous phase liquids.

For stakeholders, regulators, technology decision makers, and others involved in selecting and implementing surfactant/cosolvent flushing of dense nonaqueous-phase liquids as a remedial action.