This toolkit replaces, combines, and updates three previous ITRC vapor intrusion documents to create a scientifically based, consensus approach to explain concepts and best practices regarding vapor intrusion.

Guidance on ethylene oxide (EtO) emissions, including regulatory developments, effective risk communication strategies, and technical considerations for sampling, measurement, and analysis.

Designed to aid state regulators in understanding various mitigation strategies, how they are installed and fundamentally work, and what factors to consider as part of the review process.