Eklund, B., L. Beckley, and R. Rago.
Remediation 28(4):23-35(2018)

Regulatory requirements for the evaluation of vapor intrusion vary significantly among states. For site owners and responsible parties that have sites in different regulatory jurisdictions, one challenge is to know and understand how the requirements or expectations for vapor intrusion differ from one jurisdiction to the next. Differences in requirements can make it difficult to manage sites in a consistent manner across jurisdictions. This article provides an update to the 2012 study to include revised and new guidance. For each state, the review presents tabulations of the types of screening values included (e.g., groundwater, soil, soil gas, indoor air) and the screening values for selected chemicals that commonly drive vapor intrusion investigations (i.e., TCE, PCE, and benzene) along with other compounds of potential interest. In addition, the article summarizes for each state key policy decisions that are important for the investigation of vapor intrusion, including distance screening criteria, default subsurface-to-indoor-air attenuation factors, mitigation criteria, and policies for evaluation of short-term TCE exposure. See additional information in 27 slides at http://iavi.rti.org/attachments/WorkshopsAndConferences/01_Eklund%20AEHS%202018%20-%20Overview%20of%20State%20VI%20Approaches%20(Rev2).pdf.