Provides practical steps for managing the remediation process at complex sites where progress is uncertain and achieving regulatory closure or long-term management within a reasonable timeframe is not expected.

Provides best practices for managing long-term institutional control programs, including stewardship, monitoring, tracking, and a downloadable tool for developing site-specific stewardship plans.

Presents the results and identified challenges of a survey of state regulator perspectives on long-term stewardship.

For regulators, technology users, and stakeholders to facilitate the use of polyethylene diffusion bag sampling, particularly for the long-term monitoring of volatile organic compounds in groundwater.