February 2024 Supplemental Vapor Intrusion Guidance Presentation - YouTube

This presentation provides a general overview of vapor intrusion basics and the guidance document:

• vapor intrusion basics and implementation of the guidance
• revisions from the 2020 Draft Supplemental Vapor Intrusion Guidance
• each of the four steps in the screening and evaluation process
• Attachments 1 through 4, additional considerations for vapor intrusion evaluations, including lines of evidence, petroleum-specific considerations, sewers and other vapor conduits, and groundwater as a line of evidence.

Public Notice – February 2024 Supplemental Vapor Intrusion Guidance Presentation Posting and Live Question and Answer Sessions

• English
• Spanish

Final Draft Supplemental Guidance: Screening and Evaluating Vapor Intrusion

The Final Draft Supplemental Guidance: Screening and Evaluating Vapor Intrusion (Final Draft Supplemental VI Guidance) is available for use at contaminated properties in need of vapor intrusion assessments at buildings that may be at risk from vapor intrusion. The Final Draft Supplemental VI Guidance is a tool to help practitioners and regulators conduct vapor intrusion assessments for buildings that may be prone to vapor intrusion from underlying or nearby contamination.

• Final Draft Supplemental Guidance: Screening and Evaluating Vapor Intrusion
• Building Survey Form
• Indoor Air Source Screen Form

Response to Generalized Public Comments on the February 2020 Draft Supplemental Guidance: Screening and Evaluating Vapor Intrusion

The CalEPA VI Workgroup reviewed all comments received on the Draft Supplemental VI Guidance, categorized them based on the topic, and grouped the more significant into generalized comments. The comments and responses for 24 the generalized comments are presented in this document.

• Response to Comments

Executive Summary Fact Sheet

The Executive Summary Fact Sheet highlights the topics suggested and briefly describes the Final Draft recommended four step approach for screening and evaluating vapor intrusion.

• English Version
• Spanish Version

Public Notice

The CalEPA Vapor Intrusion Workgroup revised the Draft Supplemental Guidance: Screening and Evaluation Vapor Intrusion and provided Response to Generalized Comments on the Draft version.

• English Version
• Spanish Version

February 2020 Draft Supplemental Guidance

The Public Draft Supplemental Guidance: Screening and Evaluating Vapor Intrusion is available for review and public comment until 12:00 noon, April 30, 2020. See public notice for available public meetings.

• February 2020 Draft Supplemental Guidance
• Building Survey Form
• Indoor Air Source Screen Form

Executive Summary Fact Sheet

The Executive Summary Fact Sheet highlights the topics suggested and briefly describes the four recommended steps for screening and evaluating vapor intrusion.

• English Version
• Spanish Version

The CalEPA Vapor Intrusion Workgroup has developed and posted video presentations online and will host two live Question and Answer Sessions in lieu of the public meetings.

• Public Notice May 2020
• Aviso Público Modificado

Due to the COVID-19 public health emergency, the original public information meetings scheduled for April 2020 are postponed until further notice.

• Revised Public Notice
• Aviso Público Modificado