Assessing Airborne Risks Through PFAS Release Modeling
Understanding PFAS Risks Through Accidental Release Modeling
As the use of emerging technologies increases across industries, organizations seek to better understand the potential environmental and health implications of materials that contain PFAS. One modern example is fluoronitrile (C4F7N), a PFAS compound used in small concentrations within certain insulating gas mixtures for electric circuit breakers.
PFAS release modeling helps evaluate how these materials may behave in the event of an accidental airborne release, supporting informed risk management decisions and providing valuable insight into potential airborne impacts.
Key Takeaways
— PFAS release modeling evaluates potential airborne impacts from accidental release scenarios.
— The approach considers chemical properties, equipment details, site conditions, weather, and nearby receptors.
— For most PFAS, short-term limits are unavailable or in development, but available toxicological and occupational data can help guide evaluation benchmarks.
— Results can guide facility design, controls, monitoring, emergency planning, and stakeholder communication.
— These PFAS risk evaluations support responsible environmental management as PFAS science and regulations continue to evolve.
What is PFAS Accidental Release Modeling?
PFAS accidental release modeling is a valuable tool that helps owners, operators, regulators, and community stakeholders evaluate potential impacts from the unlikely event of a chemical release. By applying EPA-approved air dispersion modeling software such as ALOHA (Areal Locations of Hazardous Atmospheres), modelers can estimate how a PFAS-containing substance may disperse in the atmosphere, identify potential exposure areas, and support informed decision-making related to facility design, emergency response planning, and risk management.
How Does PFAS Release Modeling Work?
PFAS-related release modeling assessments typically begin by evaluating the amount of PFAS-containing material that could be released under a defined worst-case or credible-release scenario. Site-specific information is then incorporated into the analysis to predict how concentrations may change with distance from the source of the release.
Site-specific modeling inputs may include:
- PFAS chemical properties
- Release quantity and duration
- Equipment characteristics
- Local meteorological concerns
- Terrain
- Nearby receptors
By combining release scenario data with trustworthy modeling techniques, organizations can understand potential airborne impacts and identify areas for potential planning or risk management.
Interpreting PFAS Release Modeling Results
Interpreting PFAS release modeling results involves comparing predicted airborne concentrations with exposure benchmarks to understand potential risks and next steps.
A common challenge in PFAS impact assessments is the limited availability of sufficient toxicological and occupational data and/or regulatory exposure thresholds for many PFAS compounds. While certain PFAS chemicals, such as PFOA and PFOS, have been more extensively studied, they are often not appropriate surrogates for evaluating other PFAS compounds because their toxicity and chemical behavior can significantly differ. In such cases, a review of the available toxicological studies, occupational exposure guidance, and other scientific literature for similar classes of PFAS can help establish appropriate benchmarks for evaluating potential impacts.
Once the appropriate benchmarks have been established, the resulting modeling analysis can provide valuable insight into the potential extent of airborne impacts and support the development of best management practices, preventive controls, monitoring strategies, and emergency response procedures designed to protect workers, communities, and the environment.
How Langan Can Support PFAS Release Modeling
As PFAS-related regulations and scientific understanding continue to evolve, accidental release modeling remains an important tool for evaluating emerging technologies and supporting responsible project compliance. Langan’s air quality specialists, PFAS technical experts, risk assessors, and environmental professionals collaborate to develop defensible, site-specific strategies that help organizations understand potential risks and identify practical mitigation solutions.
By integrating established air dispersion modeling techniques with an understanding of PFAS science and regulatory developments, the team navigates uncertainty, proactively driving solutions that consider stakeholder concerns and support environmental stewardship, public health protection, and long-term project success.
Langan’s PFAS experts help clients apply modeling techniques to evaluate modeled airborne release scenarios and better understand potential exposure pathways to support project planning and risk-informed decision-making.
Jessica Preston is a Senior Project Manager in Langan’s Austin office with over 16 years of experience in environmental compliance. She specializes in air dispersion modeling, air permitting, multimedia environmental compliance reporting and audits, and state and federal permitting and auditing programs. Preston manages a range of projects in the federal, oil & gas, chemicals, private equity, and building products sectors, bringing deep regulatory knowledge and practical experience to each engagement.
PFAS Release Modeling FAQs
Which industries can benefit from PFAS release modeling?
PFAS release modeling can support organizations in industries that manufacture, use, store, or manage PFAS-containing materials. This may include electric utilities, manufacturing, aerospace, chemical processing, aviation, and other industrial facilities evaluating potential airborne release scenarios.
Does PFAS release modeling replace environmental monitoring?
No, PFAS release modeling does not replace environmental monitoring, and the two techniques serve different purposes. Release modeling estimates potential airborne impacts under specified release scenarios, while environmental monitoring measures actual environmental conditions. Depending on project goals, organizations may use one or layer in both approaches.
Can PFAS release modeling be customized for individual facilities?
Yes, PFAS release modeling is based on site-specific information, including facility layout, equipment characteristics, local weather conditions, terrain, and nearby receptors. This allows the assessment to reflect conditions unique to a particular location and project.
How can PFAS release modeling support emergency preparedness?
PFAS release modeling can help organizations understand potential exposure areas, evaluate response scenarios, and identify considerations for emergency planning and communication. These insights can support emergency preparedness efforts before an accidental release occurs.
What are the limitations of PFAS release modeling?
Like any predictive analysis, PFAS release modeling has limitations as it is based on assumptions, available scientific data, and hypothetical release scenarios. Results should be interpreted within the context of those assumptions.
Why is site-specific data important for PFAS release modeling?
Site-specific conditions—including equipment design, meteorological data, terrain, and surrounding land uses—can significantly influence release modeling. Using accurate site information helps produce results that are more representative of real-world scenarios.