The Forever Chemicals in Your Slurry Tank: How EPA's 2026 PFAS Guidance Changes Hydrovac Disposal

Picture a routine day on a utility-locating job at the edge of a regional airport. Two trucks, a crew of four, a few hours of daylighting to expose a fiber run before the directional-boring contractor arrives. The slurry tank fills with the usual mix — roughly sixty percent water, forty percent soil — and the operator heads for the disposal facility he has used for a decade.

Except this airport, like hundreds of others, spent decades training with aqueous film-forming foam. The soil that just went into the tank may carry PFAS at concentrations that turn an ordinary slurry load into a regulated waste stream. And in April 2026, the U.S. Environmental Protection Agency quietly rewrote the rulebook for where that load is allowed to end up.

The change did not make headlines in the hydrovac world. It should have.

What EPA actually did

On a procedural level, almost nothing. EPA issued an update to its Interim Guidance on the Destruction and Disposal of PFAS and PFAS-Containing Materials — the third version of a document first published in 2020 and revised in 2024. It is guidance, not regulation. In the agency's own words, it "does not establish requirements" and instead offers "recommendations for managers of PFAS and PFAS-containing materials."

It is tempting for an operator to stop reading there. Guidance is not law; recommendations are not mandates. But that read misses how environmental compliance actually works in the field. Disposal facilities write their waste-acceptance policies around EPA guidance. State regulators lean on it when they draft enforceable rules. And when a contaminated load is challenged years later, the question a court asks is not "was there a regulation?" but "did the parties handle this material consistent with the best available federal guidance at the time?" The 2026 document is now that benchmark.

Three substantive shifts matter for anyone whose truck might haul PFAS-impacted soil.

Landfills lost ground. The single most consequential update is a downgrade. EPA states plainly that "new information demonstrates landfilling could result in higher PFAS releases to the environment than previously thought in 2024." Landfilling — historically the cheapest, closest, most convenient default for contaminated soil — now carries a higher environmental-risk assessment than it did eighteen months ago. The agency still recognizes permitted hazardous-waste (RCRA Subtitle C) landfills as appropriate for high-concentration material because they carry the strictest engineering controls, but the comfortable assumption that any lined landfill will take the load has eroded.

Thermal treatment gained credibility. Cutting the other direction, EPA reports that "new research since 2024 has yielded promising results" showing certain hazardous-waste combustors can effectively destroy PFAS under specific operating conditions. The agency remains pointedly skeptical of ordinary municipal waste combustors and wants testing before they accept large quantities. The practical signal: high-temperature destruction is becoming the favored end state for concentrated material, and it is not cheap.

Deep-well injection holds — where it exists. EPA continues to recommend permitted Class I injection wells, which isolate liquid waste thousands of feet underground. The caveat is geography: those wells are concentrated in a handful of states, and the agency notes the option "may not be appropriate or available everywhere." For an operator in a region without a nearby Class I well, this recommended pathway is effectively theoretical.

Two smaller notes round out the picture. EPA introduced a formal technology-evaluation framework for judging emerging destruction methods, and — tellingly — committed to updating this guidance annually rather than every few years. The disposal landscape for PFAS is now officially a moving target.

Why a hydrovac operator is exposed at all

The disposal guidance is only half the story. On its own, a recommendation about combustor temperatures does not reach into a hydrovac company's bank account. The mechanism that does is a separate rule that has been quietly hardening in the background since 2024.

In May 2024, EPA designated two of the most common PFAS compounds — PFOA and PFOS — as hazardous substances under CERCLA, the federal Superfund law. The rule took effect that July. Through 2025, as the broader regulatory climate shifted toward deregulation and the designation drew litigation, many in the industry assumed it might be rolled back. It was not. In September 2025, EPA announced it would continue to defend the listing. As of mid-2026, PFOA and PFOS remain CERCLA hazardous substances.

That designation is the reason a slurry tank matters. CERCLA is built on the principle that the parties who handle a hazardous substance — generators, transporters, and the people who arrange for its disposal — can be held responsible for cleanup if it is mishandled. When a hydrovac crew excavates PFAS-impacted soil, the company removing it is, in regulatory terms, generating and transporting a waste stream that now contains a federally designated hazardous substance. The reporting backstop is concrete: any release of a pound or more of PFOA or PFOS in a 24-hour period triggers federal notification obligations under CERCLA and EPCRA.

To be precise about the limits — because precision is what keeps an operator out of trouble — the designation does not automatically make every party in the chain liable, and EPA has signaled it wants to protect genuine "passive receivers" who never introduced PFAS into the environment. A hydrovac contractor who unknowingly daylights a contaminated corridor is not a polluter in any moral sense. But "I didn't know" is a weak position when the alternative was a site-history check and a soil screen that a reasonable operator could have run. The exposure is real even when the fault is not.

Where PFAS actually shows up in hydrovac work

It is worth being calm and specific here, because the wrong lesson from all of this is panic. The overwhelming majority of hydrovac work — municipal utility daylighting, residential service locates, routine potholing on clean corridors — produces slurry that will never trip a PFAS threshold. This is not a reason to test every load.

The risk concentrates around known source zones, and the hydrovac industry's growing role in PFAS remediation puts crews closer to those zones every year. Excavation is the go-to strategy for removing PFAS source material from soil, and precision daylighting is increasingly the tool of choice for that work. The places where a slurry tank is most likely to carry forever chemicals are predictable:

• Airports and military installations. The Department of Defense has confirmed PFAS contamination at more than 450 installations, with investigations ongoing at over 700 — a legacy of decades of AFFF firefighting foam used in training and emergency response. Concentrations can be staggering; one Virginia joint base reported PFOS in soil and groundwater at levels measured in the millions of parts per trillion.
• Fire-training grounds and academies, civilian and industrial, where the same foams were used for live-burn exercises.
• Industrial and manufacturing legacy sites — chrome plating, textile and paper coating, chemical production.
• Landfill perimeters and certain wastewater and biosolids land-application areas, where PFAS has migrated into surrounding soil.

The common thread is that all of these are knowable before the truck arrives. A site history, a conversation with the client about prior land use, and — where the history warrants it — a pre-job soil screen are the difference between a managed waste stream and a surprise.

The squeeze, in dollars

When a load does test positive, the 2026 guidance reshapes the economics in a single direction: up. The cheap default got more expensive, and the expensive alternatives became the recommended path.

Consider the gap. Ordinary contaminated-soil disposal at a permitted Subtitle D landfill might run a few tens of dollars per tonne. Routing the same material to a Subtitle C hazardous-waste landfill, a Class I injection well, or a high-temperature destruction facility can multiply that cost severalfold — before the added trucking distance to reach one of the limited facilities that qualifies. For a concentrated PFAS load, the disposal-and-haul line on a job can swing from a rounding error to the single largest cost on the ticket.

That swing is precisely why the characterization step matters so much. An operator who tests, documents, and routes a flagged load correctly absorbs a known, bid-able cost. An operator who sends an uncharacterized PFAS load to a municipal landfill that later traces it back is looking at a cost with no ceiling — investigation, potential cleanup contribution, and the reputational tail of being named in a Superfund matter. The 2026 guidance widened the distance between doing it right and doing it cheap.

What operators should do now

None of this requires a hydrovac company to become an environmental-law firm. It requires a handful of disciplines to move from "nice to have" to standard operating procedure.

1. Screen the site before you screen the soil. The cheapest PFAS control is knowing the land-use history before you bid. Build a simple intake question into your job-acceptance process: has this site, or anything adjacent, been associated with firefighting foam, fuel handling, plating, coating, or landfill operations? A "yes" is the trigger for a closer look — not a reason to walk away, but a reason to price the job differently.

2. Know your generator status — and your documentation. When you remove impacted soil, you are handling the waste. Treat manifesting, chain-of-custody, and waste-characterization records as protection, not paperwork. Clean documentation is the single best defense if a load is ever questioned years later.

3. Pre-qualify a compliant disposal pathway. Do not wait until a tank is full to discover that your usual facility no longer accepts PFAS-flagged material under its updated acceptance policy. Identify, in advance, which facilities in your region will take characterized PFAS soil, what they require, and what they charge. In some regions that pathway is short; in others it is hundreds of miles away, and that distance belongs in your bid.

4. Put PFAS in your contracts. Master service agreements and project bids written for clean daylighting rarely contemplate contaminated material. Add language that addresses who bears the cost of characterization and elevated disposal when a site turns out to be impacted, and how a flagged load changes scope. Operators doing dedicated remediation support should treat this as table stakes; everyone else should treat it as cheap insurance.

5. Watch the annual update. EPA has committed to revising this guidance every year. What is recommended in 2026 may tighten in 2027, and state rules tend to follow federal guidance with a lag. The operators who stay current will price risk accurately; the ones who do not will find out the hard way, one load at a time.

The macro read

The PFAS story is, at its core, the same story the hydrovac industry keeps encountering from different directions: the work is getting more regulated, the disposal side is getting more expensive and more consolidated, and the cost of operating on stale information is climbing. A guidance document that "establishes no requirements" still managed to narrow the disposal options for an entire category of soil — because in environmental compliance, guidance is the rough draft of the rule that follows.

For most operators, on most jobs, nothing changes tomorrow. The slurry tank fills with clean soil and goes where it always has. But the share of hydrovac work that touches contaminated ground is rising, not falling, as the industry takes on more remediation support and as the map of known PFAS sites keeps growing. On those jobs, the difference between a profitable ticket and an open-ended liability now comes down to a few questions asked before the truck rolls.

The forever chemicals were always in some of that soil. What changed in 2026 is that the regulator finally made it expensive to pretend otherwise.

Hydrovac News covers the regulatory, disposal, and operational developments shaping the hydro-excavation industry across North America. This article is editorial analysis, not legal advice; operators should consult qualified environmental counsel on specific PFAS-handling obligations. For ongoing coverage, subscribe to our weekly newsletter.