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
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
- EPA Region 9 RSLs
Colorado Vapor Intrusion Guidance
- Colorado 2016 Air Screening Concentrations Table
- Petroleum Hydrocarbon Vapor Intrusion Guidance Document
- Colorado Soil Evaluation Values
- Colorado Petroleum Hydrocarbon 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
- Idaho Evaluation of Indoor Air Pathway Guidance, Appendix C
- Idaho Risk Evaluation Manual for Petroleum Releases
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
- Iowa Tier 1 RBCA for Leaking Underground Storage Tanks (PDF download)
- Iowa Tier 2 Site Clean up RBCA for Leaking Underground Storage Tanks (PDF download)
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
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
- Recommended Interim Action Screening Levels
- 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
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 Jersey 2012 Changes to Requirements for Air Analyses
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
- Division of Remediation – Vapor Intrusion Investigation Process and Flowchart
Texas Vapor Intrusion Guidance
- No current guidance. Contact us for information.
Vermont Vapor Intrusion Guidance
Virginia Vapor Intrusion Guidance
- Virginia VI Screening Tables
- Virginia VI Screening Fact Sheet
- Virginia Risk Assessment Guidance, Voluntary Remediation Program
Washington Vapor Intrusion Guidance
Washington D.C.
West Virginia Vapor Intrusion Guidance
Wisconsin Vapor Intrusion Guidance
- Wisconsin DHFS VI Fact Sheet
- Vapor Intrusion Resources for Environmental Professionals
- Wisconsin Guidance for Documenting the Investigation of Utility Corridors
- Wisconsin DNR Vapor Guidance: Addressing Vapor Intrusion at Remediation & Redevelopment Sites in Wisconsin
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
- Petroleum Hydrocarbon Vapor Intrusion Guidance Document
- 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
- Idaho Evaluation of Indoor Air Pathway Guidance, Appendix C
- 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