Vapor intrusion to indoor air from volatile organic compound (VOC) contamination in the subsurface is increasingly becoming a more important exposure pathway when developing site conceptual models and ultimately obtaining site closure. Until recently, this exposure pathway was not often considered during site characterization. The direct measurement of the vapor intrusion to indoor air pathway is typically difficult to perform due to sample collection methods and interferences to samples such as ambient air. In order to perform valid measurements, a thorough understanding of the site and use of multiple characterization tools are necessary. A cost effective three-phase approach to ssess the vapor intrusion to indoor air pathway at the South Mesa Water Quality Assurance Fund (Arizona State Superfund or WQARF) Registry site in Gilbert, Arizona was implemented.
Assessment and Remediation of Vapor Intrusion to Indoor Air, South Mesa State Superfund Site Gilbert, Arizona