In this second installment of the Brownfield Braintrust Podcast, Matt Winefield discusses ten flaws with the Cal-EPA 0.03 attenuation factor (AF) in the Draft Vapor Intrusion Guidance Document. All parties agree that the AF should be based on best available science. Best available science dictates that Cal-EPA must use the AF developed in the 2020 DTSC attenuation factor study, which utilized California data exclusively and has been extensively peer reviewed.

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