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.

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.

Provides an eight-step process with checklists for the effective assessment and management of vapor intrusion at sites contaminated with petroleum hydrocarbons.