Technical Resources for Vapor Intrusion Mitigation (VIM) is 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.

This ITRC petroleum vapor intrusion (PVI) guidance document provides an 8-step process for the effective assessment and management of vapor intrusion at sites contaminated with petroleum hydrocarbons. The guidance presents a method of screening petroleum-contaminated sites for potential vapor intrusion and tools and strategies that offer the most efficient means of evaluating the vapor intrusion pathway at these sites.  Two checklists are also included as attachments to use in conjunction with the eight-step process to organize and document decisions; one for a single site and one for multiple sites.

Describes applicable approaches for evaluating the vapor intrusion pathway in six typical scenarios.

Provides a generalized framework for evaluating the vapor intrusion pathway and describes the various tools available for investigation, data evaluation, and mitigation.

An overview of vapor intrusion, contaminant types with vapor intrusion potential, brownfield sites’ potential to have indoor air exposure from vapor intrusion, and steps that can be taken to limit exposures.