Cal/EPA Releases Final Draft of VI Guidance
The Final Draft Supplemental Guidance for Screening and Evaluating Vapor Intrusion released by the Cal/EPA was released formalizing the use of a generic attenuation factor of 0.03 for screening vapor intrusion. Significant research has shown that this attenuation factor is not representative of conditions observed in California. For example, the June 2021 California Specific Attenuation […]