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.

Describes practices to recognize and evaluate the presence of natural attenuation of chlorinated solvent contamination.

Summarizes survey results from participants of the Natural Attenuation of Chlorinated Solvents in Groundwater training course.

An outline and protocol for the general class of in situ bioremediation technologies. Includes a detailed literature review of technology-specific protocols for natural attenuation and bioventing of petroleum hydrocarbons.