Vapor Intrusion Technical Guidance by State and Topic

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

Select a state from the menu below or scroll down to browse the list of guidance.
Select a topic from the menu below or scroll down to browse the list of guidance.

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Alabama Vapor Intrusion Guidance

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California Vapor Intrusion Guidance

Colorado Vapor Intrusion Guidance

Connecticut Vapor Intrusion Guidance

Delaware Vapor Intrusion Guidance

Florida Vapor Intrusion Guidance

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Idaho Vapor Intrusion Guidance

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Indiana Vapor Intrusion Guidance

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Maine Vapor Intrusion Guidance

Maryland Vapor Intrusion Guidance

Massachusetts Vapor Intrusion Guidance

Michigan Vapor Intrusion Guidance

Minnesota Vapor Intrusion Guidance

Mississippi Vapor Intrusion Guidance

Missouri Vapor Intrusion Guidance

Montana Vapor Intrusion Guidance

Nebraska Vapor Intrusion Guidance

New Hampshire Vapor Intrusion Guidance

New Jersey Vapor Intrusion Guidance

New Mexico Vapor Intrusion Guidance

New York Vapor Intrusion Guidance

North Carolina Vapor Intrusion Guidance

North Dakota Vapor Intrusion Guidance

Ohio Vapor Intrusion Guidance

Oklahoma Vapor Intrusion Guidance

Oregon Vapor Intrusion Guidance

Pennsylvania Vapor Intrusion Guidance

Rhode Island Vapor Intrusion Guidance

South Carolina Vapor Intrusion Guidance

South Dakota Vapor Intrusion Guidance

Tennessee Vapor Intrusion Guidance

Texas Vapor Intrusion Guidance

Vermont Vapor Intrusion Guidance

Virginia Vapor Intrusion Guidance

Washington Vapor Intrusion Guidance

West Virginia Vapor Intrusion Guidance

Wisconsin Vapor Intrusion Guidance

Wyoming Vapor Intrusion Guidance

Vapor Intrusion Topics

EPA Vapor Intrusion Links

Other Sources of Vapor Intrusion Guidance

EPA Vapor Intrusion Guidance

Other Vapor Intrusion Guidance

Vapor Intrusion - General

Johnson and Ettinger Model

Standards & Screening Levels

Indoor Air and Soil Vapor Sampling and Analysis

Indoor Air Background/Ambient Air

Vapor Intrusion and Petroleum Releases

Vapor Intrusion Sites

Conferences/Seminars/Workshops

Indoor Air Quality - General

Radon

Sampling and Analysis - General

Our Consultants

  • Nancy Bice, P.G., CEG

    Nancy Bice is a Senior Principal Engineering Geologist based in California with more than 20 years of experience focused on the characterization and remediation of sites impacted by volatile organic compounds. She specializes in innovative site characterization techniques, and the design and implementation of groundwater remediation systems. Nancy has developed site-specific soil and groundwater remediation applications for some of the most complex sites in California regulated under Californ ...
  • Karen Berry-Spark

    Karen Berry-Spark is a Senior Principal Hydrogeologist based in Ontario with more than 20 years of professional experience focused on the characterization and remediation of sites impacted by chlorinated solvents and other dense non-aqueous phase liquids (DNAPLs) in soil and groundwater. Karen has developed site-specific remedies using in situ bioremediation, zero-valent iron, and related technologies at sites throughout North America. Karen's practice also focuses on the assessment a ...
  • Helen Dawson, Ph.D.

    Helen Dawson is a Principal Civil and Environmental Engineer based in Washington, D.C. with more than 30 years of experience focused on private practice, academia, and public service. Her practice spans a wide range of technical disciplines including vapor intrusion, groundwater characterization, and contaminant fate and transport modeling related to the spread of dense non-aqueous phase liquids, chlorinated solvents, and metals in the environment. Sought out for regulatory analysis a ...
  • Todd McAlary, Ph.D., P.Eng., P.G.

    Todd McAlary is a Senior Principal Engineer with more than 25 years of international consulting experience focused on the evaluation of contaminant fate and transport in soil and groundwater. Todd specializes in assessing and mitigating the migration of volatile organic compound (VOC) vapor from the sub-surface environment into buildings and in the assessment of human health risks associated with inhalation exposure. He co-authored the first technical publication demonstrating the pot ...
  • Robert Ettinger

    Robert Ettinger is a Senior Principal Environmental Scientist based in California with more than 20 years of professional experience focused on the fate and transport of contaminants in the unsaturated zone, including soil vapor extraction system design, vapor emission estimation, and subsurface contaminant vapor migration to indoor air. Robbie has extensive experience in assessing potential subsurface vapor intrusion to indoor air associated with former and current gasoline retail an ...
  • Peter Zeeb, Ph.D., P.G., LSP

    Peter Zeeb is a Senior Principal Hydrogeologist based in Massachusetts with more than 20 years of experience focused on investigation and remediation strategy at some of the most challenging sites in the country, including CERCLA-regulated sites in New England and the Midwest, as well as numerous state-regulated sites. Specializing in site investigations, modeling, pilot tests, remedial strategy development/alternatives analyses, and full-scale remedy design for more than 20 years, Pe ...
  • David Folkes, P.E.

    David Folkes is a Senior Principal Environmental Consultant based in Colorado with more than 35 years of experience focused on environmental and geotechnical consulting throughout the United States and Canada. One of the nation's foremost experts on vapor intrusion (VI) evaluation and mitigation, Dave was invited by U.S. EPA to address the national Resource Conservation and Recovery Act meetings held in 2000 and 2002 on VI issues impacting sites throughout the country. Dave also was a ...
  • Beau Hodge, P.G.

    Beau Hodge is a Principal Geologist based in North Carolina with more than 25 years of experience focused on environmental site investigation and remediation with a focus on recalcitrant compounds including chlorinated solvents, creosote, and coal tars. He is a professional geologist with expertise in developing assessment, remediation, and closure strategies. Beau is a Registered Site Manager under the North Carolina Registered Environmental Consultant Program, the voluntary remediat ...
  • Greg Corcoran, P.E.

    Greg Corcoran is a Senior Principal Civil Engineer based in California with more than 25 years of experience with a focus on the design, construction, and operation of engineered systems for waste containment facilities and brownfield sites impacted by contaminants in soil, soil gas, and groundwater.  During his career, he has become a recognized national expert in the design, permitting, and construction of liner and cover systems for municipal, industrial, mine, mill, and haza ...
  • Sam Williams, P.G.

    Sam Williams is a Senior Principal Hydrogeologist based in California with more than 25 years of experience focused on the characterization and remediation of soil and groundwater contamination at industrial and commercial properties. Utilizing his experience in site characterization and innovative remediation programs to work with clients on converting impacted properties into community assets as commercial developments through Brownfields site redevelopment programs, Sam has worked ...
  • Duane Graves, Ph.D.

    Duane Graves is a Senior Principal Scientist based in Tennessee with more than 30 years of experience focused on environmental biotechnology; environmental forensics; in situ groundwater, soil, and sediment remediation; evaluation of airborne biological contaminants; and remediation of groundwater in karst formations. Duane specializes in the development, selection, feasibility evaluation, design, and deployment of remedial solutions for hazardous, radioactive, and mixed-waste, contam ...
  • Susan Welt, M.P.H., P.E.

    Susan Welt is a Senior Engineer based in New York with almost 20 years of experience focused on the investigation and remediation of industrial sites, former manufactured gas plants (MGP), mining operations, and U.S. Department of Defense facilities.  She is an experienced strategic planner and risk communicator and manager of soil, groundwater, sediment, and vapor intrusion (VI) projects. Susan's practice also focuses on the risk-based management of contaminated sediments and th ...
  • Mark Grivetti, P.G., CHG, CEG

    Mark Grivetti is a Senior Principal Hydrogeologist based in California with more than 30 years of experience focused on characterization and remediation of hazardous waste sites, surface and groundwater resource management, and engineering geology studies for a wide range of projects. He brings creative environmental solutions to the redevelopment of complex sites impacted by soil and groundwater contamination. Mark's worldwide experience in the investigation and remediation of comple ...
  • Chris Herin, P.G.

    J. Chris Herin is a Senior Principal Hydrogeologist practitioner in the field of environmental risk management and minimization based in Florida with more than 25 years of experience focused on the mitigation of environmentally impaired properties, environmental compliance, due diligence (All Appropriate Inquiry), and cost-to-cure estimates. He also specializes in groundwater studies, contaminant fate and transport evaluations, and waste management. He is often tapped to serve as a technical ...
  • Keith Tolson, Ph.D.

    Keith Tolson is a Senior Principal Environmental Scientist with more than 15 years of experience focused on environmental sciences. He Specializes in the application of risk-based principles to support legal and regulatory requirements. Keith provides expert technical and strategic consultation on matters related to regulatory compliance and litigation. He also develops and supports public risk communication concerning the health effects of chemicals in air, water, soil, sediments, consumer p ...
  • Tom Peel, Ph.D.

    Tom Peel is a Senior Principal based in Florida with more than 20 years of experience focused on environmental science and engineering including the development of regulatory and risk-based strategies to obtain cost effective closure and redevelopment for environmentally impacted properties. He specializes in applying innovative risk-based approaches to reduce the cost of site assessment and remediation activities. Tom has directed investigations and remedial strategy development for ...
  • Scott Drew, LSRP

    Scott Drew is a Principal Environmental Scientist based in New Jersey with more than 25 years of experience focused on the fields of environmental technology, site remediation, and environmental chemistry. His practice focuses on the in situ remediation of organic compounds, including chlorinated solvents, explosives, and MTBE. His recent work in fractured rock environments has included the application of anaerobic bioaugmentation in mudstones and biosparging in karst. Over the course ...
  • Mary deFlaun, Ph.D., BCES

    Mary deFlaun is a Senior Principal Environmental Scientist based in New Jersey with more than 20 years of experience focused on the development and implementation of in situ remediation technologies. Mary has practical experience bringing in situ remediation technologies addressing recalcitrant organics and metals from bench and pilot scale applications to practical field applications. She has applied technologies such as biostimulation and bioaugmentation to impacted soil and groundw ...
  • Peter Dollar

    Peter Dollar is a Principal Hydrogeologist based in Ontario with more than 20 years of experience focused on site characterization, remediation strategy, remedial design and implementation, and risk management. In particular, his professional practice focuses on the characterization and remediation of sites impacted by chlorinated solvents, petroleum hydrocarbons, and metals in soil and groundwater. His technical expertise is focused on the geochemistry of contaminated soils and groun ...
  • Todd Creamer, P.G.

    Todd Creamer is a Principal Geologist based in New England with more than 20 years of experience in environmental consulting services, surface water hydrology, and oil and natural gas exploration and production. His work has focused on the characterization of and remedial strategy for industrial, institutional and residential properties impacted by chlorinated solvents and petroleum hydrocarbons. Specializing in vapor intrusion of volatile compounds into indoor air and LNAPL behavior ...
  • Robert Glazier, P.G.

    Robert Glazier is a Principal Environmental Consultant based in Maryland with more than 30 years of experience focused on site remediation, risk assessment, and environmental permitting associated with solid and hazardous waste landfills as well as power generation and manufacturing facilities. Bob's consulting services focus on the strategic management of environmental liabilities, working with private sector clients who want to reduce financial exposures associated with cleaning up ...
  • Daniel Schauer, P.G.

    Daniel Schauer is a Senior Principal Geologist based in Florida with over 24 years of geological, hydrogeological, and geotechnical engineering consulting experience focused on multidisciplinary engineering contracts for federal, municipal, and private clients throughout the U.S. and abroad. His practice focuses on construction management, construction engineering, landfill reclamation, construction QA/QC, and remedial system O&M. To assist his clients, Dan has used his geologic a ...
  • Robert Ferree, CPG

    Robert Ferree is a Principal Geologist based in Michigan with more than 30 years of experience focused on hydrogeologic investigations; remedial investigations; underground storage tank (UST) removal; soil and groundwater sampling plan preparation; soil and groundwater sampling in accordance with RCRA and CERCLA guidance; surface and down-hole geophysical methods; remediation system design; remedial system installation; slug test and aquifer test performance and analysis; and environmental si ...
  • Jeffrey Kurtz, Ph.D.

    Jeffrey Kurtz is a Senior Geologist based in Colorado with more than 30 years of experience focused on geochemical assessments, site investigations, and environmental forensics. Helping clients to protect human health, Jeff complies with regulatory requirements, minimizes potential third party liabilities, and helps to remediate complex sites impacted by vapors from contaminated soil and groundwater. He also specializes in geochemical field investigations and assessments of the fate a ...
  • Robert Veenstra

    Robert Veenstra is a Principal Environmental Engineer based in Missouri with more than 30 years of experience focused on developing and managing complex soil, groundwater and sediment investigation and remediation programs associated with large petroleum facilities (refineries, terminals, tank farms, E&P properties, etc.) and chemical manufacturing facilities and former manufactured gas plants under the requirements of RCRA Corrective Action, CERCLA, and numerous state-lead programs. ...
  • James Cowart, P.E.

    James Cowart is a Senior Consultant based in Colorado with more than 35 years of experience focused on water quality permitting, industrial wastewater treatment, and watershed management throughout the United States. He also conducts numerous vapor intrusion investigations and directs large-scale voluntary cleanups for mines, manufacturing plants, and brownfield redevelopment sites, among others. Assisting clients in numerous industries, Jim has worked closely with oil and gas product ...
  • Eric Tollefsrud, P.G.

    Eric Tollefsrud is a Principal Hydrogeologist based in Minneapolis with more than 25 years of environmental consulting experience focused on the characterization and remediation of soil, soil vapor, and groundwater contamination at industrial and commercial properties. With expertise in complex site characterization and environmental remediation projects, Eric uses state-of-the-practice technologies to help clients make better informed decisions regarding the remediation of contaminat ...
  • Melissa Schmitt, P.E.

    Melissa Schmitt is a Principal Environmental Engineer based in Washington State with more than 10 years of professional experience focused on contaminated site assessment, remediation, and regulatory compliance. She specializes in helping her clients perform site assessments and develop closure strategies, as well as design, implement, and optimize soil and groundwater remediation projects at their complex sites. Melissa's key practice experience includes program management of severa ...
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