Framework for preventing, assessing, and responding to biofuel releases, including their environmental behavior, site characterization, and remedial responses.

Provides a decision framework incorporating key aspects of the EPA’s three-volume technical background series on monitored natural attenuation for metals and radionuclides in groundwater.

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

Provides direction on integrating enhanced attenuation into remedial decision making for a smooth transition between aggressive remediation and monitored natural attenuation.

Description of practices to be used to recognize and evaluate the presence of natural attenuation of chlorinated solvent contamination.

Presents a summary of results of surveys returned by people who took the natural attenuation course.