As leaders in the assessment and management of subsurface vapor intrusion to indoor air, our practitioners maintain a comprehensive list of vapor intrusion guidance, and share it below to advance the state of the vapor intrusion practice.
Vapor Intrusion Guidance Quick Links
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Browse State Vapor Intrusion Guidance
Alabama Vapor Intrusion Guidance
Alaska Vapor Intrusion Guidance
Arizona Vapor Intrusion Guidance
California Vapor Intrusion Guidance
- San Diego County Instructions to Vapor Risk 2000
- San Diego County Vapor Risk Assessment
- California DTSC Active Soil Gas Investigation
- California Air Resources Board Ambient Air Concentrations
- California DTSC Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air
- Correcting JE Model for Soil Temperature
- California Human Health Screening Levels
- California Johnson & Ettinger Model
- California VI Mitigation Advisory
- California EPA Toxicity Criteria Database
- California Schoolscreen Guidance
- California Soil Screening Numbers
- California Vapor Intrusion
- San Francisco Bay RWQCB ESLs
- San Francisco Bay RWQCB Mitigation Guidance
- The 2023 Supplemental Guidance: Screening and Evaluating Vapor Intrusion, Final Draft
- EPA Region 9 RSLs
Colorado Vapor Intrusion Guidance
- Colorado 2016 Air Screening Concentrations Table
- Colorado Soil Evaluation Values
- Colorado Petroleum Hydrocarbon Vapor Intrusion Guidance
- Colorado Vapor Intrusion Guidance
Connecticut Vapor Intrusion Guidance
- Connecticut Remediation Standard Regulations
- Connecticut Proposed Revised Volatilization Criteria
- Connecticut Significant Environmental Hazard Threshold Concentrations
Delaware Vapor Intrusion Guidance
Florida Vapor Intrusion Guidance
- No current guidance. Contact us for information.
Georgia Vapor Intrusion Guidance
Hawaii Vapor Intrusion Guidance
- Hawaii Soil Vapor and Indoor Air Sampling Guide
- Hawaii Evaluation of Environmental Hazards Action Level Tables
Idaho Vapor Intrusion Guidance
Illinois Vapor Intrusion Guidance
Indiana Vapor Intrusion Guidance
- Indiana Department of Environmental Management Vapor Intrusion
- Indiana Department of Environmental Management – Vapor Mitigation Systems Technical Guidance Document
- Indiana Department of Environmental Management – Vapor Remedy Selection and Implementation Guidance Document
- Indiana Department of Environmental Management - Vapor Intrusion Investigation Documentation
- Indiana Department of Environmental Management – Technical Guidance For Cleanups – Screening Level Tables and Remediation Program Guide
Iowa Vapor Intrusion Guidance
Kansas Vapor Intrusion Guidance
Louisiana Vapor Intrusion Guidance
Maine Vapor Intrusion Guidance
- Maine VI Guidance
- Links page for Remediation Program Guidance: Guidance for the Investigation and Clean-up of Hazardous Substance Sites in Maine
- Remediation Guidelines for Petroleum Contaminated Sites in Maine (Google Chrome Only)
- Maine DEP Summary Report - State of Maine Vapor Intrusion Study for Petroleum Release Sites
Maryland Vapor Intrusion Guidance
- Maryland Toxic Air Pollutant Regulations Assistance
- VI Tech Combined
- Land Restoration Program
- LRP Vapor Intrusion Guidance
- LRP - Vapor Intrusion Citizens Guide Fact Sheet Update September 2019
Massachusetts Vapor Intrusion Guidance
- October 2016 final VI guidance
- Massachusetts Guidelines for the Design, Installation, and Operation of Sub-Slab Depressurization Systems
- Massachusetts Indoor Air Sampling and Evaluation Guide
- Massachusetts An Evaluation of Vapor Intrusion Into Buildings through a Study of Field Data (1996)
- Massachusetts Typical Indoor Air Concentrations
Michigan Vapor Intrusion Guidance
- Guidance Document for the Vapor Intrusion Pathway, May 2013
- Cleanup Criteria Tables
- Cleanup Criteria Rules
- Resource Materials for the Part 201 and Part 213 Programs
- Generic Cleanup Criteria Proposed Rules Revisions
Minnesota Vapor Intrusion Guidance
- Minnesota Department of Health, Clean Indoor Air Act
- Minnesota Vapor Intrusion Technical Support Document (August 2010)
- Minnesota Petroleum Vapor Intrusion Guidance
- Minnesota DOH, Health Risk Values for Air
- Minnesota Vapor Intrusion Guidance
- General Mills - Minneapolis
- Remediation Division Methane Guidance
Mississippi Vapor Intrusion Guidance
Missouri Vapor Intrusion Guidance
- Missouri Department of Natural Resources Vapor Intrusion Page
- Missouri Department of Health and Senior Services VI Fact Sheet
- Missouri Risk-Based Corrective Action (MRBCA) Process for Petroleum Storage Tanks
Montana Vapor Intrusion Guidance
Nebraska Vapor Intrusion Guidance
Nevada Vapor Intrusion Guidance
- Case Officer Screening Method for Identifying Sites Where Vapor Intrusion May Pose an Imminent and Substantial Hazard
- Site Clean Up Guidance
New Hampshire Vapor Intrusion Guidance
New Jersey Vapor Intrusion Guidance
- New Jersey Vapor Intrusion Guidance Documents
- Rutgers University VI Seminar
- New Jersey Johnson and Ettinger Spreadsheets
New Mexico Vapor Intrusion Guidance
- New Mexico Risk Assessment Guidance for Site Investigations and Remediation
- Vapor Intrusion Screening Level table (June 2019)
New York Vapor Intrusion Guidance
- NYDOH Endicott Soil Vapor Project
- NYSDOH Volatile Organics in Air of Fuel Oil Heated Homes
- NYDEC Strategy for Evaluating Vapor Intrusion at Remedial Sites
- NYSDOH Guidance for Evaluating Soil Vapor Intrusion
- NYSDOH Indoor Air Sampling and Analysis Guidance
- NYSDOH Background VOCs Data
- New York Soil Cleanup Levels
North Carolina Vapor Intrusion Guidance
North Dakota Vapor Intrusion Guidance
- No current guidance. Contact us for information.
Ohio Vapor Intrusion Guidance
- Sample Collection and Evaluation of Vapor Intrusion to Indoor Air
- Recommendations Regarding Vapor Intrusion Response in Ohio
- Ohio Environmental Protection Agency Recommendations Regarding Response Action Levels and Timeframes for Common Contaminants of Concern at Vapor Intrusion Sites in Ohio
Oklahoma Vapor Intrusion Guidance
- No current guidance. Contact us for information.
Oregon Vapor Intrusion Guidance
- Oregon Risk Based Decision Making for Petroleum Contaminated Sites
- Oregon Screening Model for Volatilization from Soil to Indoor Air at Heating Oil Tank Sites
- Oregon Guidance for Assessing and Remediating Vapor Intrusion in Buildings
Pennsylvania Vapor Intrusion Guidance
Rhode Island Vapor Intrusion Guidance
- Rhode Island DEM Remediation Regulations
- School Siting Guidance for the Evaluation of VI Potential in Proposed RI School Sites
South Carolina Vapor Intrusion Guidance
- No current guidance. Contact us for information.
South Dakota Vapor Intrusion Guidance
Tennessee Vapor Intrusion Guidance
- Tennessee Underground Storage Tank Forms & Guidance
- Vapor Mitigation Guidance for Sites Enrolled in the Brownfield Projects Voluntary Cleanup Oversight and Assistance Program
Texas Vapor Intrusion Guidance
- No current guidance. Contact us for information.
Vermont Vapor Intrusion Guidance
Virginia Vapor Intrusion Guidance
- Virginia VI Screening Tables
- Virginia Risk Assessment Guidance, Voluntary Remediation Program
- Office of Remediation Programs (ORP) | Virginia DEQ
Washington Vapor Intrusion Guidance
Washington D.C.
West Virginia Vapor Intrusion Guidance
Wisconsin Vapor Intrusion Guidance
- Wisconsin DHS VI Fact Sheet
- Vapor Intrusion Resources for Environmental Professionals
- Guidance for Documenting the Investigation of Human-made Preferential Pathways Including Utility Corridors
- Wisconsin DNR Vapor Guidance: Addressing Vapor Intrusion at Remediation & Redevelopment Sites in Wisconsin
- VAPOR INTRUSION RESOURCES FOR LOCAL GOVERNMENTS
- VAPOR INTRUSION RESOURCES FOR ENVIRONMENTAL PROFESSIONALS
- Addressing Vapor Intrusion at Remediation and Redevelopment Sites in Wisconsin (RR-800)
Wyoming Vapor Intrusion Guidance
Vapor Intrusion Topics
EPA Vapor Intrusion Links
- EPA EPI Suite for Adjusting Henry's Constant
- EPA IRIS Toxicological Review of PCE
- Background Indoor Air Concentrations of Volatile Organic Compounds in North American Residences (1990–2005): A Compilation of Statistics for Assessing Vapor Intrusion
- EPA"s Vapor Intrusion Database: Evaluation and Characterization of Attenuation Factors for Chlorinated Volatile Organic Compounds and Residential Buildings
- Conceptual Model Scenarios for the Vapor Intrusion Pathway
- EPA Options for Developing and Evaluating Mitigation Strategies for Indoor Air Impacts (1993)
- Past VI Conferences and Workshops
- EPA Vapor Intrusion Mitigation Approaches
- EPA Version: Johnson & Ettinger Model
- EPA Johnson and Ettinger Reverse Calculation of target Media Concentrations
- EPA Johnson and Ettinger Calculator Forward Calculation of Indoor Air Concentration
- EPA Air Quality Models
- EPA Hazardous Air Pollutants
- EPA TO-15 Sampling and Analytical Method
- EPA TO-17 Sampling and Analytical Method
- Supplement to Method TO-15 — Reduction of Method Detection Limits
- EPA ORD Version of the Johnson and Ettinger Model
- Technical Guide for Assessing and Mitigating the VI Pathway from Subsurface Vapor Sources to Indoor Air
- Uncertainty of J-E Model Calculations
- EPA Brownfields Technology Primer: Vapor Intrusion Considerations for Redevelopment
- Review of VI Research
- Assessing Potential Indoor Air Impacts for Superfund Sites
- EPA Inspector General VI Report (14 Dec 2009)
Other Sources of Vapor Intrusion Guidance
- EnviroGroup Redfield site
- Indoor Air Vapor Intrusion Database Website
- Petroleum Vapour Model Comparison
- Paper on Background Indoor and Outdoor Air Concentrations
- Interstate Technology and Regulatory Council -Vapor Intrusion Issues at Brownfield Sites
- Method for Assessing Soil Vapor Intrusion From Petroleum Release Sites: Multi-Phase/Multi-Fraction Partitioning
- API VI Web Site
- Air Force Guide for the Assessment of the Vapor Intrusion Pathway (PDF download)
- ITRC Vapor Intrusion: A Practical Guide
- ITRC Vapor Intrusion: Investigative Approaches for Typical Scenarios
- Tri Services VI Handbook
- API A Practical Strategy for Assessing the Subsurface Vapor-to-Indoor Air Migration Pathway at Petroleum Hydrocarbon Sites
- DOD VI Handbook
- Atlantic Partnership in Risk - Based Corrective Action for Petroleum Impacted Sites
EPA Vapor Intrusion Guidance
- NPDES Permit Compliance System Database
- CERCLIS/SEMS Database
- Toxic Release Inventory Database
- RCRA Database
- EPA Envirofacts
- EPA Integrated Risk Information System (IRIS)
- EPA Urban Air Toxics Monitoring Program Reports
Other Vapor Intrusion Guidance
- ATSDR Toxicological Profile Information Sheets
- National Library of Medicine - Household Products
- NIOSH Databases
- Kansas RSK Manual
Vapor Intrusion - General
- EPA Vapor Intrusion Mitigation Approaches
- Massachusetts An Evaluation of Vapor Intrusion Into Buildings through a Study of Field Data (1996)
- New Jersey Vapor Intrusion Guidance Documents
- Pennsylvania VI Guidance
- Wisconsin DHFS VI Fact Sheet
- Vapor Intrusion Resources for Environmental Professionals
- Wisconsin Guidance for Documenting the Investigation of Utility Corridors
- Indoor Air Vapor Intrusion Database Website
- NYDEC Strategy for Evaluating Vapor Intrusion at Remedial Sites
- California DTSC Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air
- NYSDOH Guidance for Evaluating Soil Vapor Intrusion
- Alaska -Evaluation of Vapor Intrusion Pathway at Contaminated Sites
- Interstate Technology and Regulatory Council - Vapor Intrusion Issues at Brownfield Sites
- Ohio Vapor Intrusion Guidance
- Review of VI Research
- ITRC Vapor Intrusion: A Practical Guide
- ITRC Vapor Intrusion: Investigative Approaches for Typical Scenarios
- Delaware Vapor Intrusion Guidance
- Indiana Department of Environmental Management – Vapor Remedy Selection and Implementation Guidance Document
- Kansas Vapor Intrusion Guidance
- Air Force Guide for the Assessment of the Vapor Intrusion Pathway (PDF download)
- EPA Brownfields Technology Primer: Vapor Intrusion Considerations for Redevelopment
- Virginia VI Screening Fact Sheet
- Maryland Toxic Air Pollutant Regulations Assistance
- Tri Services VI Handbook
- Assessing Potential Indoor Air Impacts for Superfund Sites
- DOD VI Handbook
- Massachusetts VI Blog
- Nebraska Risk-Based Corrective Action at Petroleum Release Sites
- Washington VI Guidance
- Oregon Guidance for Assessing and Remediating Vapor Intrusion in Buildings
- Maine VI Guidance
- EPA Inspector General VI Report (14 Dec 2009)
- Montana Vapor Intrusion Guidance
Johnson and Ettinger Model
- EPA Version: Johnson & Ettinger Model
- EPA Johnson and Ettinger Reverse Calculation of target Media Concentrations
- EPA Johnson and Ettinger Calculator Forward Calculation of Indoor Air Concentration
- EPA ORD Version of the Johnson and Ettinger Model
- Petroleum Vapour Model Comparison
- Superfund JE Model Spreadsheet Error
- Correcting JE Model for Soil Temperature
- Uncertainty of J-E Model Calculations
- California Johnson & Ettinger Model
- New Jersey Johnson and Ettinger Spreadsheets
Standards & Screening Levels
- San Diego County Instructions to Vapor Risk 2000
- EPA Risk Assessment for Superfund Sites
- Connecticut Significant Environmental Hazard Threshold Concentrations
- San Diego County Vapor Risk Assessment
- Connecticut Proposed Revised Volatilization Criteria
- Washington Developing Air Cleanup Standards
- EPA Region 3 Ecological Freshwater Screening Benchmarks
- EPA Hazardous Air Pollutants
- NOAA Screening Quick Reference Tables
- EPA TCE Fact Sheet
- 314 CMR 5: Ground Water Discharge Permit Program
- California Schoolscreen Guidance
- California Human Health Screening Levels
- California Soil Screening Numbers
- Hawaii Soil Vapor and Indoor Air Sampling Guide
- Kansas RSK Manual
- Virginia VI Screening Tables
- Colorado Soil Evaluation Values
- Michigan Risk Based Screening Levels for Groundwater
- EPA Toxicological Review of TCE
- Michigan Risk Based Screening Levels for Soil
Indoor Air and Soil Vapor Sampling and Analysis
- NYSDOH Indoor Air Sampling and Analysis Guidance
- EPA TO-15 Sampling and Analytical Method
- EPA TO-17 Sampling and Analytical Method
- Supplement to Method TO-15 — Reduction of Method Detection Limits
- California DTSC Active Soil Gas Investigation
- Colorado 2016 Air Screening Concentrations Table
- Massachusetts Indoor Air Sampling and Evaluation Guide
- Michigan target Detection Limits
Indoor Air Background/Ambient Air
- California Air Resources Board Ambient Air Concentrations
- Indiana Office of Air Quality Ambient Air Concentrations
- EPA Air Quality Models
- Paper on Background Indoor and Outdoor Air Concentrations
- NYSDOH Background VOCs Data
- EPA Urban Air Toxics Monitoring Program Reports
- Massachusetts Typical Indoor Air Concentrations
- Indiana 2016 Ambient Air Monitoring Network Plan
Vapor Intrusion and Petroleum Releases
- Colorado Petroleum Hydrocarbon Vapor Intrusion Guidance
- Oregon Risk Based Decision Making for Petroleum Contaminated Sites
- Oregon Screening Model for Volatilization from Soil to Indoor Air at Heating Oil Tank Sites
- NYSDOH Volatile Organics in Air of Fuel Oil Heated Homes
- Method for Assessing Soil Vapor Intrusion From Petroleum Release Sites: Multi-Phase/Multi-Fraction Partitioning
- API VI Web Site
- Missouri Evaluation of Indoor Inhalation Pathway for Petroleum Storage Tank Sites
- South Dakota Screening Tables
- Atlantic Partnership in Risk-Based Corrective Action for Petroleum Impacted Sites
- Minnesota Petroleum Vapor Intrusion Guidance
Vapor Intrusion Sites
Conferences/Seminars/Workshops
Indoor Air Quality - General
- Minnesota Department of Health, Clean Indoor Air Act
- Indoor Air Quality Basics
- Basics of Indoor Air Quality in Homes
- An Office Building Occupant"s Guide to Indoor Air Quality
- Building Air Quality - A Guide for Building Owners and Facility Managers
- EPA Indoor Air Quality Topics
- The Inside Story — A Guide to Indoor Air Quality (EPA & CPSC)
- Technical Guide for Assessing and Mitigating the VI Pathway from Subsurface Vapor Sources to Indoor Air
- Indoor Air Pollution: Introduction for Health Professionals (CPSC, AMA, EPA, ALA)
- VOC Concentrations in Office Buildings
- Building Assessment Survey and Evaluation (BASE) Survey
Radon
- EPA Radon Website
- EPA Consumer's Guide to Radon Reduction
- EPA Citizen"s Guide to Radon
- Radon Mitigation Standards
- EPA Protocols for Radon Measurements (1993)
- EPA Model Standards and Techniques for Control of Radon in New Residential Buildings
- Building Radon Out
Sampling and Analysis - General
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Vapor Intrusion
Vapor Intrusion Services
- Overview of Vapor Intrusion Services
- Vapor Intrusion Site Characterization
- Vapor Intrusion Management, Mitigation Design, and Installation
- Vapor Intrusion Due Diligence
- Vapor Intrusion Guidance
Vapor Intrusion Resources
