PFAS Contamination at Gas Stations: What Operators Must Know

PFAS at Fuel Retail Sites: A Growing Liability Operators Can’t Ignore

For decades, gas station environmental compliance meant one thing: underground storage tank (UST) leak detection, petroleum hydrocarbon cleanup, and MTBE remediation. That world is changing fast. Per- and polyfluoroalkyl substances — better known as PFAS, or “forever chemicals” — are emerging as one of the most significant new environmental liabilities facing fuel retail operators, and many owners have no idea the exposure is sitting on their property right now.

PFAS contamination at fuel retail sites doesn’t come only from spilled gasoline. It comes from fire suppression systems, equipment cleaning agents, and even the aqueous film-forming foam (AFFF) that may have been discharged on your forecourt years ago. Understanding the sources, the regulatory landscape, and your obligations is no longer optional — it’s financial survival.

What Are PFAS and Why Do They Matter at Gas Stations?

PFAS are a group of more than 12,000 synthetic chemicals that have been used in industrial and consumer products since the 1940s. The defining characteristic that makes them an environmental nightmare: they do not break down in the environment or in the human body. Once they’re in soil or groundwater, they stay there — sometimes for centuries. That’s why they earned the nickname “forever chemicals.”

At fuel retail locations specifically, PFAS concern operators for several reasons beyond general environmental exposure:

• AFFF fire suppression systems — Aqueous film-forming foam, historically used in Class B fire suppression systems (the kind installed in service bays, fuel dispenser canopies, and fuel islands), contains extremely high concentrations of PFAS, particularly PFOS (perfluorooctane sulfonate) and PFOA (perfluorooctanoic acid). A single AFFF discharge can contaminate groundwater for years.
• Equipment degreasers and cleaning agents — Many commercial-grade degreasers used on dispensers, tanks, and shop floors historically contained PFAS compounds as surfactants.
• Fuel contamination pathways — Though gasoline itself is not a primary PFAS source, spill cleanup materials and certain fuel additives may introduce PFAS to the site environment.
• Co-mingled plumes — Sites with existing petroleum plumes may face regulators requiring PFAS testing as a condition of petroleum site closure, dramatically expanding remediation scope and cost.

The Regulatory Landscape: Federal Rules Are Moving Fast

EPA’s National Primary Drinking Water Regulation (April 2024)

In April 2024, the U.S. Environmental Protection Agency finalized the first-ever National Primary Drinking Water Regulation (NPDWR) for PFAS under the Safe Drinking Water Act. The rule established Maximum Contaminant Levels (MCLs) for six PFAS compounds. Public water systems must comply by 2029, but these limits will set the de facto cleanup standard for contaminated sites — including gas stations — across the country.

PFAS Compound	EPA MCL	Previous Standard
PFOA	4 parts per trillion (ppt)	No enforceable limit
PFOS	4 ppt	No enforceable limit
PFHxS	10 ppt	No enforceable limit
PFNA	10 ppt	No enforceable limit
HFPO-DA (GenX)	10 ppt	No enforceable limit
PFBS mixture	Hazard index ≤1	No enforceable limit

For context: 4 parts per trillion is extraordinarily low. A single tablespoon of water in 4,700 Olympic swimming pools. This standard will make many currently “closed” petroleum sites eligible for reopening if PFAS testing reveals contamination at these thresholds.

CERCLA Hazardous Substance Designation (2024)

In 2024, the EPA also designated PFOA and PFOS as hazardous substances under CERCLA (the Comprehensive Environmental Response, Compensation, and Liability Act — better known as Superfund). This is a landmark change. CERCLA designation means that parties responsible for PFAS releases — including property owners — can be held strictly liable for cleanup costs, potentially without regard to when the contamination occurred or who actually caused it.

For gas station operators who have purchased sites with prior history of AFFF use or who operate service bays with legacy fire suppression systems, this liability exposure is not theoretical.

State Regulations: Leading the Federal Government

Several states have moved ahead of federal standards, and operators in these states face immediate obligations:

• Michigan — Among the strictest standards in the country, with MCLs as low as 8 ppt for PFOS and 6 ppt for PFOA in groundwater, plus mandatory reporting requirements for releases.
• Vermont — Groundwater enforcement standards for PFOA, PFOS, PFNA, PFHxS, PFHpA, and PFDA at 20 ppt combined.
• Massachusetts — MassDEP has established a 20 ppt combined standard for six PFAS and actively requires testing at sites with known or suspected AFFF use.
• New Jersey — Individual MCLs for PFNA (13 ppt), PFOA (14 ppt), and PFOS (13 ppt), enforced under the state’s Site Remediation Reform Act.
• California — The State Water Resources Control Board is actively investigating PFAS at UST sites through its Leaking Underground Storage Tank (LUST) program, with 2026 expected to bring new mandatory testing guidance.

Operators should check with their state environmental agency or a qualified environmental consultant for state-specific UST program integration with PFAS requirements, as these are evolving rapidly.

PFAS Gas Station Sources: A Site-by-Site Audit Checklist

Before you can assess your liability, you need to know what’s on your property. Conduct a thorough review using this checklist:

Fire Suppression Systems

• Does your service bay, canopy, or fuel island have a fixed fire suppression system? When was it installed?
• Is the suppression agent AFFF-based? Review your system documentation — systems installed before 2018 are likely AFFF.
• Has the system ever been discharged, either in an actual fire event or during testing?
• Has the system been recently inspected and converted to a PFAS-free fluorine-free foam (F3) agent?

Historical Site Use

• Did the site previously operate as a full-service station with a service bay?
• Are there records of fire events or suppression system discharges in your property records or Phase I ESA (Environmental Site Assessment)?
• What cleaning agents and degreasers have been used on the forecourt and in any service areas?

Neighboring Properties

• Are there airports, military installations, or fire training facilities within a 1-mile radius? These are among the highest-risk PFAS sources for off-site groundwater migration.
• Has your local groundwater already been flagged by state regulators for PFAS from other sources?

AFFF System Replacement: What Operators Should Do Now

If your site has an AFFF-based suppression system, replacement is no longer just a best practice — it’s becoming a regulatory and insurance requirement in many jurisdictions. NFPA 11 (Standard for Low-, Medium-, and High-Expansion Foam) and NFPA 30A (Code for Motor Fuel Dispensing Facilities and Repair Garages) both address foam suppression systems applicable to fuel retail sites.

The transition from AFFF to fluorine-free foam (F3) alternatives is technically feasible but requires careful system evaluation. Key steps include:

1. Engage a licensed fire protection engineer to assess your current system design and flow rates against F3 alternatives. F3 agents have different application rates and may require system modifications.
2. Coordinate with your insurance carrier. Many property and liability insurers are now asking specifically about AFFF systems during renewals and are adding PFAS exclusions to policies. Proactive system replacement may protect your coverage.
3. Arrange proper AFFF disposal. Old AFFF concentrate cannot simply be drained to a floor drain or sanitary sewer. It must be managed as a hazardous waste under RCRA and disposed of by a licensed hazardous waste contractor. Improper disposal creates additional CERCLA liability.
4. Document everything. Retain all records of system replacement, foam disposal manifests, and contractor certifications. These records are your first line of defense in any future regulatory action.

Site Assessment: When and How to Test for PFAS Contamination

If your site has any of the risk factors identified above, a voluntary PFAS site assessment is strongly advisable before regulators come to you. A proactive approach gives you control over the process, allows you to select your own qualified environmental consultant, and may be viewed more favorably by regulators if contamination is found.

PFAS testing follows EPA Method 533 or Method 537.1, which can detect PFAS compounds in water at sub-ppt concentrations. Soil testing methods are also available under EPA SW-846 methods. Your environmental consultant will typically recommend:

• Groundwater sampling from existing monitoring wells (if your UST program requires monitoring wells, these can be sampled for PFAS at minimal additional cost)
• Soil sampling in areas of suspected AFFF discharge or degreaser use
• Indoor air or soil vapor sampling if a structure with AFFF discharge history exists on-site

Be aware that if you are already in an active petroleum remediation program, many state UST agencies are beginning to require PFAS testing as a condition of No Further Action (NFA) letters or site closure. Operators managing active petroleum cleanup sites should ask their remediation consultant specifically whether PFAS co-investigation is required or anticipated in their state.

Financial Exposure: What’s at Stake

The financial stakes of PFAS contamination at fuel retail sites are significant and multi-dimensional:

Cleanup Costs

PFAS remediation is substantially more expensive than conventional petroleum cleanup. Technologies like granular activated carbon (GAC) filtration, ion exchange resin systems, and high-temperature incineration for concentrate disposal carry costs that routinely run into the hundreds of thousands to millions of dollars, depending on plume size. Unlike petroleum contamination, state UST trust funds do not currently cover PFAS cleanup in most states — meaning this is an out-of-pocket expense for operators.

Third-Party Liability

Under CERCLA’s strict liability framework, neighboring property owners, municipalities, or private well users affected by PFAS migration from your site could pursue cost recovery actions. Settlements in PFAS contamination cases have ranged from hundreds of thousands to tens of millions of dollars, depending on the scale of impact.

Property Value and Transaction Risk

PFAS contamination discovered during Phase II environmental due diligence can kill a sale, collapse financing, or dramatically reduce valuation. For operators planning to sell or refinance, understanding your PFAS status before a buyer’s environmental consultant discovers it is critical.

Regulatory Penalties

Failure to report a known PFAS release in states with mandatory reporting requirements can result in penalties comparable to UST violation fines — often $10,000–$25,000 per day per violation under state environmental statutes. CERCLA civil penalties for failure to report a hazardous substance release can reach $59,017 per day under current EPA penalty adjustment schedules.

Practical Action Items for Fuel Retail Operators

Given the pace of PFAS regulation and the complexity of liability exposure, the following actions represent a responsible baseline for every fuel retail operator in 2026:

1. Conduct a PFAS source inventory at every location you own or operate. Identify all fire suppression systems, their agent type, and any discharge history.
2. Review your Phase I ESA records for historical AFFF use mentions. If your Phase I is more than three years old, consider an update that specifically evaluates PFAS recognized environmental conditions (RECs).
3. Consult a licensed environmental attorney before conducting any voluntary sampling if you have high-risk indicators. Attorney-client privilege may be available to protect certain investigation results in some circumstances.
4. Contact your state environmental agency or UST program office to understand whether PFAS testing requirements apply to your active remediation sites or are being added to your state’s UST closure procedures.
5. Review your insurance policies specifically for PFAS exclusions. Pollution legal liability (PLL) policies are the primary coverage vehicle for PFAS-related claims, and the market is tightening quickly.
6. Engage a certified industrial hygienist or environmental consultant with specific PFAS experience. This is a specialized field — not all environmental firms have the analytical and regulatory expertise required.
7. Begin the AFFF-to-F3 conversion process for any operational suppression systems on your properties, coordinating with your fire protection contractor and local fire marshal.

Looking Ahead: What Operators Should Expect in 2026 and Beyond

The PFAS regulatory environment will continue to accelerate. EPA is expected to finalize additional PFAS hazardous substance designations beyond PFOA and PFOS, potentially capturing dozens more compounds commonly found at fuel retail sites. State programs will continue to integrate PFAS requirements into existing UST and brownfield programs, and litigation from municipalities and private parties against responsible parties will intensify.

PFAS contamination at fuel retail sites is not a distant or theoretical concern — it is a present and material liability that operators who fail to assess and address will face on regulators’ terms rather than their own. The operators who move proactively to understand their site conditions, manage their suppression systems, and engage experienced counsel and consultants are the ones who will navigate this challenge without catastrophic financial consequences.

Key Takeaway: PFAS “forever chemicals” are becoming a central environmental compliance issue for gas station operators, driven by EPA’s 2024 drinking water MCLs, CERCLA hazardous substance designations, and rapidly expanding state regulations. Sites with AFFF fire suppression systems, historical service bay operations, or active petroleum remediation are at greatest risk. Proactive assessment, system replacement, and expert consultation are the critical first steps every operator should take now.