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California Vapor Intrusion Blog

This California Vapor Intrusion (VI) Blog provides updates on CalEPA’s rule development process associated with reducing attenuation factors (AFs) for volatile organic compounds.  Winefield & Associates contends that the proposed new AF standard of 0.03 is neither scientifically sound nor necessary.  As such, the blog will provide scientific and regulatory data with the goal of developing sane VI criteria that remain protective of human health while not thwarting California development, especially as California experiences a severe housing shortage. 

Empirical Analysis of Vapor Intrusion Attenuation Factors for Sub-Slab and Soil Vapor

2/25/2019

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December 2018 – These documents were developed for the Air & Waste Management Association Vapor Intrusion, Remediation, and Site Closure Conference of December 6, 2018 in Phoenix Arizona. The median (i.e., 50th percentile) and 95th percentile values for AFs calculated from all filtered data in this study are 0.00012 and 0.0019, respectively. We urge the reader to download and share this data with the regulated community.
Empirical Analysis
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Presentation
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  • Home
  • Investment Criteria
  • About The Founder
  • Press
    • NY Times Article
    • LABJ Article
    • Propmodo Article
    • Commercial Property Executive Article
    • Western Real Estate Business Article
    • California City News Article
    • The Sacramento Bee Article
  • Updates
  • Podcasts
  • VI Blog
  • Contact