A PFAS Deal Example for Smarter Property Deals

A transaction can look clean on paper until a historical aerial photograph, fire response record, or wastewater discharge permit raises a PFAS question. This PFAS deal example shows how a buyer can turn that question into a defined diligence process and a workable allocation of risk, rather than allowing an emerging contaminant issue to derail the closing.

PFAS is not one contaminant with one regulatory standard. It is a large class of per- and polyfluoroalkyl substances used in products and operations ranging from aqueous film-forming foam (AFFF) to metal finishing, textiles, coatings, and certain manufacturing processes. The business issue is equally variable: a site may have no meaningful release pathway, a manageable investigation need, or a potentially material cleanup and third-party liability concern.

For buyers, lenders, developers, and counsel, the objective is not to diagnose every possible PFAS issue before signing a purchase agreement. It is to identify credible exposure pathways early, establish what remains unknown, and structure the transaction so that the remaining uncertainty is priced, managed, or retained by the appropriate party.

The PFAS Deal Example

Consider a buyer under contract to acquire a 28-acre industrial property for redevelopment into a regional logistics facility. The site includes a former metal fabrication building, a maintenance area, two historical underground storage tanks that were previously removed, and a drainage swale leading toward a tributary. The buyer intends to demolish most of the existing improvements, construct a warehouse, and obtain construction financing within a 90-day closing window.

The initial Phase I Environmental Site Assessment identifies several recognized environmental conditions related to historical petroleum use and documented solvent storage. It also identifies a potential PFAS concern: fire department records indicate AFFF was used during a 1990s fire at the maintenance building, and historical operations included a small plating line. Neither fact proves a release. Together, however, they justify a focused evaluation.

The distinction matters. A broad statement that a property has "PFAS contamination" can prematurely harden negotiations and create unnecessary alarm. A more defensible conclusion at this stage is that the property has identified PFAS use and release indicators requiring targeted diligence before the buyer can quantify risk.

Building a decision-ready scope

The buyer's environmental consultant reviews available fire incident records, historical facility plans, stormwater information, prior environmental reports, and the location of nearby water supply wells. The team also evaluates soil conditions, groundwater depth and flow direction, and the planned grading footprint. That work narrows the likely source areas to the former maintenance building, a foam-application area near the fire location, and the drainage swale.

A targeted Phase II scope follows. It includes soil borings and temporary groundwater sampling points in and downgradient of the potential source areas, with analytical methods selected for the applicable PFAS compounds and reporting limits. The scope also accounts for the practical realities of PFAS sampling: field equipment, tubing, sample containers, personal care products, and even certain waterproof materials can introduce cross-contamination if the sampling team does not use a disciplined protocol.

The buyer does not need to sample every acre. Sampling should answer transaction-specific questions: Is PFAS present? Where is it located? Is groundwater affected? Does the anticipated construction footprint intersect impacted material? Is there a plausible migration pathway toward off-site receptors?

What the Investigation Found

The targeted investigation detects PFAS compounds in shallow soil near the former foam-use area and in groundwater immediately downgradient. Results decrease substantially away from that area. No impacts are identified beneath the planned warehouse slab, but the drainage swale shows concentrations that warrant additional delineation. The available data do not establish an off-site plume, though the property boundary has not yet been fully evaluated.

This is not a clean bill of health, but it is also not an automatic reason to abandon the acquisition. The findings give the parties a basis for evaluating several categories of exposure.

First, there is project execution risk. Excavation for utility work near the former maintenance area may generate soil or water requiring special handling, characterization, or disposal. Second, there is regulatory risk. Federal and state requirements continue to evolve, and applicable reporting, investigation, cleanup, and disposal obligations depend on the compounds detected, media affected, concentrations, location, and jurisdiction. Third, there is liability risk. A buyer that takes title without appropriate protections may inherit the cost of responding to known conditions, even where the seller's historical operations created the issue.

The federal designation of PFOA and PFOS as hazardous substances under CERCLA has made these two compounds particularly significant in liability analysis. That development does not mean every PFAS detection creates CERCLA liability or a federal cleanup case. It does mean that transaction teams should be careful when evaluating historical releases, potential reporting issues, and the availability of liability defenses. State programs may regulate a broader set of compounds or apply different screening values, so a national checklist is not a substitute for state-specific regulatory strategy.

Turning Findings Into Deal Terms

With 30 days remaining before the scheduled closing, the buyer, seller, lender, counsel, and environmental consultant use the investigation results to negotiate terms tied to the actual condition rather than a generic contamination clause. The right structure depends on the property value, redevelopment timeline, seller credit, financing requirements, expected cleanup pathway, and the buyer's tolerance for residual risk.

In this example, the parties use four coordinated protections:

• A purchase price adjustment reflects estimated investigation, construction management, and likely disposal costs associated with the identified source area.

• The seller provides a defined environmental indemnity for pre-closing PFAS releases, including costs of additional delineation and regulatory response attributable to those releases.

• A portion of the purchase price is held in escrow for a negotiated period, providing a practical funding source if the next investigation phase confirms more extensive impacts.

• The buyer makes closing contingent on access for one additional round of boundary-area groundwater sampling and on lender acceptance of the final environmental risk allocation.

These terms are stronger when they are specific. A seller indemnity that refers generally to "environmental matters" may lead to a dispute over whether PFAS was contemplated, what work is covered, how long the obligation lasts, and whether a voluntary investigation qualifies for reimbursement. The agreement should define covered substances, source areas, response actions, claim procedures, survival periods, caps, exclusions, and the relationship between indemnity and escrow.

Environmental insurance may also be worth evaluating, especially where the seller has limited credit strength or the buyer plans a long-term hold. Insurance is not a replacement for diligence. Policies can have exclusions for known conditions, defined pollutants, contractual liabilities, or inadequate pre-bind investigation. Still, a carefully negotiated policy can address unknown conditions or cost overruns that exceed the negotiated escrow and indemnity structure.

Why Phase I Diligence Alone Is Not Enough

A Phase I Environmental Site Assessment remains a central transaction tool, particularly when a buyer is evaluating federal liability defenses. But standard Phase I practice does not automatically resolve PFAS risk. PFAS may be outside the scope of a particular assessment unless the client and consultant specifically identify it as a business environmental risk or incorporate targeted scope elements.

That is not a flaw in the Phase I process. It reflects the need to match diligence to the asset and the deal. A recently built office building with no relevant operational history calls for a different level of PFAS review than a former fire training area, plating facility, landfill, textile operation, airport-adjacent property, or industrial site with documented AFFF use.

The most effective approach begins with records review and operational history, then escalates only when the evidence supports it. This preserves time and capital while ensuring the buyer does not overlook a credible source area. It also gives the transaction team a documented rationale for its decisions, which is valuable to lenders, insurers, investment committees, and future buyers.

Managing the Property After Closing

In the example above, the buyer proceeds with the acquisition. Construction plans are adjusted to avoid unnecessary disturbance in the affected area, and the buyer completes boundary sampling under a state-appropriate work plan. If results confirm that impacts remain contained, the next steps may focus on delineation, source-area management, and a regulatory pathway compatible with redevelopment. If off-site migration is identified, the buyer has preserved funding and contractual rights to address a more complex response.

The key is that post-closing work remains connected to a business plan. Environmental data should inform excavation sequencing, stormwater design, utility routing, tenant restrictions, financing disclosures, and long-term operating obligations. A technical report that does not explain these project consequences leaves decision-makers with information but no strategy.

A PFAS concern should be treated neither as a routine checkbox nor as an automatic deal killer. When historical use, release indicators, and site conditions point to a credible risk, focused investigation and precise transaction terms can protect both the project schedule and the investment. The earlier those decisions are made, the more options the parties retain.