Development of Commercial/Industrial Vapor Intrusion Mitigation BMP

The MPCA is in the process of developing a Best Management Practice document for vapor intrusion mitigation at commercial and industrial properties. The agency hopes to have this BMP developed by the spring of 2018.


The MPCA will report progress on the the timeline below as the process moves forward. The goal is to have the commercial/industrial BMP ready to release in the spring of next year.

Vapor intrusion BMP development timeline

Invitation for stakeholder contributions

The MPCA needs input from stakeholders to make vapor intrusion BMPs practical and easier to implement consistently. Here is what you can bring to the BMP development process:

  • Technical expertise
  • Different perspectives
  • Your needs as a program user
  • Proposals to address policy issues
  • Review and comment during development process

MPCA Stakeholder Advisory Group

The MPCA has created a vapor intrusion stakeholder advisory group to provide real time feedback to MPCA vapor specialists who are developing the BMP.  However, we welcome comments and will dialog with all who wish to participate.   

If you want to participate in the BMP development process, we invite you to engage with a vapor intrusion stakeholder advisor who represents your sector or contact the vapor specialists directly to discuss questions, issues and concerns.

Vapor Intrusion Stakeholder Advisors

Kaitlin Thell Ouverson Staff Engineer Braun Intertec
Mary Sands Vice President Barr Engineering
Donovan Hannu Group Manager Bay West
Rick Kubler Principal Gray Plant Mooty
Briana Kirby Lead Environmental Risk Analyst Bremer Bank
Cathy Undem Senior Environmental Scientist Dakota County
Mary Finch Supervising Environmentalist Hennepin County
Hava Blair Program Coordinator Minnesota Brownfields
Marcus Martin Senior Planner Met Council Environmental Services

Commercial/Industrial Mitigation Issues and Questions Vapor intrusion BMP development Stp 1

Passive Mitigation

  • Are passive mitigation systems an option for mitigating a commercial/industrial building?
  • What would be sufficient verification testing for a passive system to meet the standard outlined in the Vapor Intrusion Guiding Principles?
  • Are there studies that show how well passive mitigations systems work?
  • Would a passive sub slab system be acceptable without also installing a vapor barrier?

Vapor Barriers

  • Are vapor barriers, alone or in conjunction with a passive mitigation system, an option for mitigating a commercial/industrial building?
  • Can I install vapor barrier then reevaluate the mitigation decision with a completed pathway investigation?
  • What would be appropriate technical specifications for a vapor barrier if it is approved as a mitigation approach?
  • Can a vapor barrier be used only if there is no building slab?

HVAC for Mitigation

  • Are there minimum engineering requirements (system/building design and hours of operation) for an HVAC system to be used as building mitigation?
  • Is positive pressurization of a building an acceptable mitigation technology?
  • Is increasing ventilation an acceptable mitigation technology, and if so, what are the minimum requirements?

Indoor Air Filtration

  • Under what conditions would indoor air filtration be an acceptable mitigation technology?

Underground Parking

  • Are there minimum engineering requirements for a parking garage to be considered a mitigation system?
  • Can parking garages with ventilation fans that are keyed to carbon monoxide concentrations be considered a mitigation system?

Mitigation Systems vs. Remediation Systems

  • Under what conditions could a remediation system also serve as a building mitigation system?

Required Verification Testing

  • What is the verification testing for each mitigation approach/technology?
  • Can the verification testing requirements be different for new construction?
  • Can I avoid drilling through the building slab and/or vapor barrier of new construction for confirmation testing?


If you have questions about the BMP development process or any facet of it, contact a member of the MPCA Vapor Specialist Team.