NJDEP PFAS Remediation Standards 2026: What Developers Need to Change in Phase II Scope

On June 15, 2026, the New Jersey Department of Environmental Protection formally adopted remediation standards for PFNA, PFOA, PFOS, and GenX. The rule also amended the Technical Requirements for Site Remediation to require analysis for those PFAS compounds and 2,3,7,8-TCDD when contaminants in an area of concern are unknown or not well documented.

For developers, lenders, attorneys, and contractors, this changes how certain Phase II investigations need to be scoped.

The issue is not simply adding five names to a laboratory quote. PFAS requirements can affect sampling design, laboratory coordination, soil management, groundwater evaluation, transaction budgets, and construction schedules.

The regulatory facts below come from NJDEP’s June 15, 2026 announcement and the Department’s June 24, 2026 rule adoption notice. Project-specific recommendations still require review by the environmental professional and, where applicable, the New Jersey Licensed Site Remediation Professional, or LSRP.

What NJDEP adopted on June 15, 2026

NJDEP adopted amendments to three regulatory areas:

• Ground Water Quality Standards under N.J.A.C. 7:9C
• Soil Remediation Standards under N.J.A.C. 7:26D
• Technical Requirements for Site Remediation under N.J.A.C. 7:26E

The rule formalizes interim standards that had been in place since 2022 and 2023. The adopted standards address:

• Perfluorononanoic acid, or PFNA
• Perfluorooctanoic acid, or PFOA
• Perfluorooctane sulfonate, or PFOS
• GenX chemicals, including HFPO-DA and its ammonium salt

The rule also adds PFNA, PFOA, PFOS, GenX chemicals, and 2,3,7,8-tetrachlorodibenzo-p-dioxin, commonly called 2,3,7,8-TCDD, to the analytical list in N.J.A.C. 7:26E-2.1(c)1ii.

That means these compounds must be analyzed in all relevant media when contaminants in an area of concern are unknown or not well documented.

This is a regulatory requirement under the specified conditions. It is not a recommendation to add every possible analyte to every private transaction scope.

The adopted PFAS standards developers need to understand

The adopted values address different exposure and migration pathways. The table below summarizes the values identified in NJDEP’s remediation standards materials. Confirm the current version of the NJDEP Soil and Soil Leachate Remediation Standards comparison tables before finalizing a sampling and analysis plan.

Compound	Residential soil ingestion-dermal	Non-residential soil ingestion-dermal	Soil leachate migration to groundwater	Groundwater quality standard
PFNA	0.047 mg/kg	0.67 mg/kg	0.26 µg/L	0.013 µg/L
PFOA	0.13 mg/kg	1.8 mg/kg	0.28 µg/L	0.014 µg/L
PFOS	0.11 mg/kg	1.6 mg/kg	0.26 µg/L	0.013 µg/L
GenX	0.23 mg/kg	3.9 mg/kg	0.40 µg/L	0.02 µg/L

The soil migration-to-groundwater standard may be site-specific. The applicable value depends on the regulatory pathway, groundwater classification, site conditions, and the current NJDEP standards and guidance.

The numbers also show why a simple soil-only approach can miss the project risk. A result that does not exceed a direct-contact soil standard may still require evaluation for migration to groundwater.

“With the formal adoption of these site remediation standards, the Sherrill Administration is delivering on its mission to protect public health, provide clean drinking water to the public, and restore the environment from decades of PFAS pollution across the state.”

NJDEP, June 15, 2026

What changes in a New Jersey Phase II scope

A Phase II ESA usually responds to recognized environmental conditions identified during a Phase I. In New Jersey, the investigation may also function as part of a Preliminary Assessment, Site Investigation, or broader NJDEP remediation case.

The first scope question is now more important:

Are contaminants in the area of concern known and well documented?

If the answer is no, the amended Technical Requirements call for analysis of:

• PFNA
• PFOA
• PFOS
• GenX chemicals
• 2,3,7,8-TCDD

The analysis applies across all relevant media under the rule. Depending on the area of concern and exposure pathways, that may include soil, groundwater, soil leachate, soil gas, sediment, surface water, or other media that require evaluation.

That does not mean a consultant should order every matrix without reviewing site history. It means the scope must address the amended requirement directly and document why each medium is included or excluded.

A defensible Phase II scope should identify:

1. The area of concern and the basis for investigating it.
2. What historical records establish about past chemicals and site operations.
3. Whether the contaminant profile is known, partially documented, or unknown.
4. The sample locations and depths for each medium.
5. The PFAS analytical method and laboratory reporting limits.
6. Whether 2,3,7,8-TCDD analysis is included under the amended requirement.
7. How results will be compared with current NJDEP standards.
8. How non-detects, estimated results, and data usability will be handled.

Soil, groundwater, and soil leachate are separate decisions

PFAS does not behave like a conventional petroleum release. The compounds can be highly mobile, persistent, and present at concentrations that require very low laboratory reporting limits.

Soil

Soil samples help evaluate direct contact and potential source areas. Sampling should consider former industrial operations, firefighting areas, waste handling locations, floor drains, process areas, loading zones, and fill placement.

Developers should not assume that a clean-looking surface represents site conditions. PFAS impacts may be deeper, associated with fill, or connected to historical releases that are not visible during a site walk.

Groundwater

Groundwater data can affect more than environmental liability. Results may influence dewatering requirements, treatment design, discharge approvals, construction sequencing, and long-term monitoring.

A groundwater result above the applicable standard may require additional delineation or remedial planning. It may also affect whether excavation can proceed under the original construction plan.

Soil leachate

Soil leachate analysis evaluates the potential for contaminants in soil to migrate into groundwater. It is not automatically required for every Phase II ESA. The need depends on the applicable pathway, soil conditions, groundwater setting, and the NJDEP framework governing the investigation.

This is where a clear scope matters. A low-cost quote that excludes pathway-specific analysis may create a larger cost later when NJDEP, the lender, or the LSRP requests additional work.

Budget and schedule impacts

PFAS changes should be addressed before field mobilization, not after the first laboratory report.

Potential cost drivers include:

• Additional laboratory analytes
• Lower reporting limits and specialized quality control
• More sample locations or deeper borings
• Groundwater monitoring well installation
• Soil leachate testing
• Data validation and usability review
• Additional delineation
• Treatment or disposal profiling
• LSRP coordination and NJDEP correspondence
• Construction water management and discharge controls

The schedule can also change. PFAS laboratory capacity, data review, and follow-up sampling may add time to a transaction or construction start.

For a lender, the question is whether the environmental report supports underwriting and collateral risk decisions. For an attorney, the question may involve allocation of cleanup obligations, indemnities, escrow, or regulatory responsibilities. For a contractor, the question is whether impacted soil or groundwater changes the means and methods of construction.

Each party needs the same underlying data. They may use it for different decisions.

What developers should do now

Before authorizing a Phase II in New Jersey, request a written scope that answers these questions:

• Does the property include an area of concern with unknown or poorly documented contaminants?
• Does the scope include PFNA, PFOA, PFOS, GenX, and 2,3,7,8-TCDD where required?
• Which media will the laboratory analyze?
• Are the reporting limits appropriate for current NJDEP standards?
• Will soil leachate be evaluated if migration to groundwater is a concern?
• Who will review the data against N.J.A.C. 7:9C and 7:26D?
• Is an LSRP involved, and when will that coordination begin?
• What happens if the laboratory detects PFAS?
• Are the budget and schedule assumptions written into the proposal?

Do not treat a generic Phase II template as a complete answer. A former chemical plant in Hudson County, a warehouse near Newark, and a redevelopment parcel in Jersey City may require very different sampling plans.

You can review Envicon’s Phase I and Phase II environmental assessment services, including soil, groundwater, soil vapor, PFAS assessment, and transaction support. For active NJDEP matters, our NJ LSRP services provide regulatory coordination from site investigation through closure.

Why field-first coordination matters

PFAS scope decisions sit between due diligence, regulation, laboratory work, and construction. That is where projects lose time when each consultant works from a separate file.

Envicon coordinates directly with developers, lenders, attorneys, architects, contractors, laboratories, and LSRPs. Our team builds the scope around the site history and the decision the client needs to make. We track field activity, sample status, laboratory deliverables, budget, and next steps through project dashboards instead of waiting for a monthly update.

That approach gives the client a clearer answer:

• What did we sample?
• What is still outstanding?
• Which results affect the transaction?
• Is additional delineation needed?
• Can construction proceed?
• What does NJDEP or the LSRP need next?

Collaboration is not a buzzword. It is how complex sites move forward.

For developers in Jersey City and Hudson County, the practical advantage is direct access to professionals who understand the local redevelopment environment and the demands of NJDEP oversight. You get a scope built for the property, not a national template applied from a distance.

The takeaway

NJDEP’s June 15, 2026 adoption makes PFNA, PFOA, PFOS, and GenX formal remediation standards in New Jersey. It also expands required analytical parameters for areas of concern where contaminants are unknown or poorly documented, adding those compounds and 2,3,7,8-TCDD to the required list.

For your next Phase II or NJDEP investigation:

1. Review the area of concern history before selecting the laboratory suite.
2. Address all relevant media, including soil, groundwater, and soil leachate where appropriate.
3. Use current NJDEP standards and reporting limits.
4. Build PFAS contingencies into the budget and transaction schedule.
5. Bring the LSRP and field team into the discussion early.

The right scope does more than satisfy a regulation. It gives you a defensible path to acquisition, remediation, construction, and closure.

Talk with Envicon about your New Jersey PFAS scope

• Call Envicon now at (917) 764-2171
• Get a free project quote
• Use our proprietary project risk screener

This article is for general information only. NJDEP requirements and project obligations depend on site conditions, regulatory status, applicable standards, and the facts of the investigation. Obtain project-specific advice from qualified environmental professionals and, where applicable, an NJDEP LSRP.