Provides a decision tree, case studies, and application information to determine whether biochemical reactor treatment is appropriate to treat mining-influenced water.

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.

Description of nitrate in the environment, sources of nitrate, environmental and health effects of nitrate, current nitrate remediation practices, and the emerging technology of EISBD.

Presents and discusses regulatory processes appropriate to a variety of active bioremediation techniques for chlorinated solvents in ground water.

Evaluation of state practices for establishing and implementing closure criteria for bioventing, vapor extraction, and natural attenuation of petroleum hydrocarbons and chlorinated solvents.

The In situ Bioremediation Team initiated a project to define a standardized method to compare cost and performance information from in situ bioremediation technologies.

A General Protocol and Outline for the general class of in situ bioremediation technologies plus conducted detailed literature reviews of technology-specific protocols for “Natural Attenuation” and “Bioventing” of petroleum hydrocarbons.

This report discusses case studies in six states where institutional and regulatory barriers to implementation of in situ bioremediation (ISB) were overcome.