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Implementation Memorandum No. 14: Updated Process for Initially Assessing the Potential for Petroleum Vapor Intrusion (Historical)

Publication number Date Published
16-09-046March 2016
VIEW NOW This publication is historical. It is unavailable on our website. To request a copy, please use the contact listed below.
Author(s) Mark Gordon, P.E., Policy & Technical Support Unit, Toxics Cleanup Program
Description This implementation memo provides guidance on how to initially assess whether vapor intrusion (VI) is a potential concern at sites with petroleum contamination. This publication supplements Chapter 2 (“Preliminary VI Assessments”) in Washington Department of Ecology’s 2009 draft "Guidance for Evaluating Soil Vapor Intrusion in Washington State: Investigation and Remedial Action" (link below).
NOTES This publication has been replaced by a new publication. In March 2022, this document was incorporated into “Guidance for Evaluating Vapor Intrusion in Washington State: Investigation and Remedial Action,” which is available at
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

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Keywords vapor intrusion, petroleum contamination
WEB PAGE Vapor intrusion

Guidance for Evaluating Vapor Intrusion in Washington State: Investigation and Remedial Action

Implementation Memorandum No. 22: Vapor Intrusion (VI) Investigations and Short-Term Trichloroethene (TCE) Toxicity

Implementation Memorandum No. 21: Frequently Asked Questions (FAQs) Regarding Vapor Intrusion (VI) and Ecology's 2009 Draft VI Guidance

Implementation Memorandum No. 18: Petroleum Vapor Intrusion (VI): Updated Screening Levels, Cleanup Levels, and Assessing PVI Threats to Future Buildings