Evaluating PFAS Occupational Exposure

Assessing Exposure Pathways, Worker Protection, and Emerging Liability Considerations

As PFAS science, regulation, and litigation evolve, organizations are examining potential workplace exposures. For employees, environmental professionals, regulators, and legal teams, an understanding of who may encounter PFAS, through which pathways, and under what task conditions is an increasingly important part of environmental health and safety planning and risk management.

Key Takeaways

— Occupational PFAS exposure may occur in industries that manufacture, use, maintain, or investigate PFAS-containing materials.

— Exposure evaluations focus on potential inhalation, ingestion, and dermal contact pathways.

— Environmental remediation, manufacturing, aerospace, transportation, and semiconductor operations may present elevated exposure potential.

— Exposure assessments help distinguish the presence of PFAS from meaningful worker exposure.

— PFAS considerations are increasingly integrated into existing environmental health and safety and risk-management programs.

Where Occupational Exposure May Occur

PFAS have been used for decades to impart resistance to heat, chemicals, water, oil, and friction in products and industrial processes. These characteristics have made them valuable in industrial applications ranging from manufacturing and transportation to electronics, infrastructure, and environmental remediation. Workers may encounter PFAS while handling certain hydraulic fluids, lubricants, coatings, sealants, fluoropolymers, firefighting foams, or other PFAS-treated components. Exposure potential depends on the specific PFAS and formulation, concentration, task, frequency, duration, physical form, and controls in place.

Environmental professionals may also encounter PFAS during investigation, sampling, treatment, and remediation activities involving contaminated groundwater, soil, wastewater, landfill leachate, treatment residuals, and industrial waste streams.

As organizations continue to identify PFAS in processes and supply chains, task-based workplace exposure evaluations can complement broader environmental investigations.

Understanding PFAS Exposure Pathways

The presence of PFAS-containing material alone does not necessarily translate to occupational exposure. Evaluations focus on how workers interact with these materials and whether conditions exist that could create a meaningful exposure pathway.

Potential pathways generally include:

— Inhalation of airborne particulates, aerosols, fumes, or vapors generated during manufacturing, maintenance, thermal processing, or remediation activities.

— Ingestion resulting from the transfer of contaminated dust or residue from hands, equipment, or workplace surfaces.

— Dermal contact from direct handling of PFAS-containing materials, industrial products, or treatment residuals. The contribution of skin absorption to internal dose varies by compound and formulation; dermal contamination can also create hand-to-mouth transfer.

Understanding which pathways may be active at a particular facility helps organizations prioritize monitoring efforts and evaluate whether existing controls remain appropriate.

Moving Beyond Identification to Exposure Assessment

One of the most significant challenges in occupational PFAS evaluations is distinguishing potential concern from actual exposure risk.

Organizations are increasingly asking questions such as:

• Which PFAS-containing materials are present within operations?
• Which job functions involve direct interaction with those materials?
• Are potential exposure pathways complete?
• How will background exposure and non-occupational sources be considered?
• How effective are existing engineering controls and work practices?
• Is industrial hygiene monitoring warranted?

Effectively answering these questions often requires a multidisciplinary approach that incorporates industrial hygiene, environmental science, engineering, toxicology, risk assessment, and regulatory expertise. The resulting assessment helps organizations make informed decisions regarding worker protection, operational controls, regulatory preparedness, and long-term risk management.

Occupational PFAS Exposure and Emerging Liability Considerations

Occupational exposure is also receiving greater attention in PFAS-related litigation and regulatory discussions. Potential claim evaluations may consider historical workplace conditions, exposure pathways, industrial hygiene programs, training practices, personal protective equipment, and risk communication efforts. It’s important to understand if workers experienced exposure and whether reasonable measures were implemented to manage potential risks.

As scientific understanding and regulatory expectations continue to evolve, organizations are proactively assessing workplace conditions and evaluating how well existing health and safety programs address PFAS-related concerns.

Strengthening Workforce Protection Through PFAS Exposure Assessment Looking Ahead

As organizations continue evaluating PFAS within their operations, occupational exposure considerations will likely play a growing role in environmental health and safety programs, workforce protection initiatives, and legal proceedings. Organizations that proactively evaluate workplace conditions, understand potential exposure pathways, and document appropriate controls will be better positioned to navigate future regulatory and liability challenges.

Ultimately, effective occupational PFAS management goes beyond identifying where PFAS are present; a defensible program identifies how workers interact with those materials, evaluates potential exposure pathways, and implements practical PFAS solutions to protect employee health and safety.

How Langan Supports Occupational PFAS Evaluations

Occupational PFAS assessments frequently require expertise across multiple disciplines. Langan’s PFAS practitioners support clients with exposure evaluations, industrial hygiene reviews, environmental investigations, risk assessments, remediation programs, and regulatory compliance initiatives. The team helps clients identify potential exposure pathways, evaluate workplace conditions, and develop practical risk-management strategies based on site-specific conditions.

Contact Langan’s PFAS experts to discuss your workplace concerns and identify next steps for managing potential PFAS occupational exposure.

Kimberly Semon is a Senior Project Manager in Langan’s Melville office with 15 years of experience. She delivers comprehensive environmental consulting services focused on brownfield remediation, emerging contaminants, regulatory compliance, and environmental due diligence. Her expertise includes groundwater hydrology, drinking water treatment system design, water resource planning and management, environmental remediation design, and brownfield implementation and management.

FAQs About PFAS Occupational Exposure

What is PFAS occupational exposure?

PFAS occupational exposure occurs when workers come into contact with per- and polyfluoroalkyl substances during job-related activities. Potential exposure pathways include inhalation, ingestion, and dermal contact. Exposure potential depends on the specific PFAS formulation and concentration, the tasks performed, and the controls in place.

Which workplaces may have PFAS exposure potential?

Workplaces that manufacture, use, or handle PFAS-containing materials may have exposure potential. Examples include manufacturing, aerospace, transportation, semiconductor operations, and firefighting. Environmental professionals may also encounter PFAS during sampling, treatment, and remediation.

Does the presence of PFAS mean workers are at risk?

The presence of PFAS does not establish worker exposure. An evaluation is needed to determine whether workers can contact the material, through which pathways, and how often and for how long. The specific compounds, concentrations, and existing controls also matter. 

What does a PFAS occupational exposure assessment involve?

A PFAS occupational exposure assessment may include reviewing materials and processes, identifying job tasks, evaluating potential exposure pathways, and understanding existing controls. It can also help determine whether industrial hygiene monitoring is necessary and identify next steps for managing potential exposure.

How can employers address potential PFAS exposure?

Employers can begin by identifying PFAS-containing materials and evaluating how workers interact with them. Findings can inform reviews of engineering and administrative controls, hygiene measures, hazard training, and personal protective equipment.