Provides guidance for regulators, industry, consultants, and technology vendors in understanding, evaluating, and making informed decisions about the use of constructed treatment wetland systems.

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.

Assists practitioners in formulating a proper strategy for removing the threat that metal, particularly lead, presents at closed small arms firing ranges.

Provides guidance for the systematic characterization, evaluation, and appropriate design and testing of in situ bioremediation for any bio-treatable contaminant.

Overview of the regulatory issues with aggressive in situ technologies that target dense nonaqueous phase liquid source zones for elimination or substantial reduction.

Includes descriptions of three commonly used chemical oxidants and eight case studies, as well as four examples of state regulatory applications.

A jointly developed protocol for determining when, where, and how to use diffusion samplers for groundwater sampling.

Review of three general types of emerging DNAPL characterization technologies—including geophysical, cone penetrometer, and in situ tracers— and two categories of emerging DNAPL remediation technologies—thermal enhanced extraction and in situ chemical oxidation.

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.

U.S. Air Force document revised with state input to provide technical information for PRB installation.