Provides a framework for understanding light, nonaqueous-phase liquid (LNAPL) site conditions and selecting the best-suited remedial technology.

An overview for evaluating natural source zone depletion rates and long-term progress at sites with light, nonaqueous-phase liquid contamination.

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

Provides technical and regulatory guidance on using direct push wells for long-term monitoring of groundwater chemistry and static groundwater levels.

Provides updated information on new developments and innovative approaches in applying permeable reactive barriers to treat a variety of groundwater contaminants.