Vapor Intrusion (VI) remains a hot-button topic in the environmental field for regulators, consultants, owners/operators, and prospective purchasers of commercial properties.  Collecting representative VI data can be difficult due to a variety of reasons, including weather and atmospheric conditions, the building construction, and the chemicals stored at the facility.  As VI data often drives the next steps such as mitigation or remediation, it is imperative to ensure quality sampling techniques and to conduct additional steps in order to properly evaluate the results.  This webinar will include a general background on VI, provide an overview of a few key issues to consider before/during sample collection, and provide specific steps to conduct to ensure quality results.