Exploring the Key Differences Between Phase 1 and Phase 2 Environmental Site Assessments

If you’re trying to understand how the Fastest Phase I environmental site assessment reports differ from the follow-on work, the core answer is simple: Phase 1 is a structured investigation of potential contamination indicators, while Phase 2 adds sampling and lab testing to confirm or quantify impacts. In practice, the “fast” part usually refers to workflow efficiency—parallel record review, planned interviews, and a tightly scoped site visit—not skipping evidence quality. The move from Phase 1 to Phase 2 happens when Phase 1 identifies conditions (often described as recognized environmental conditions) or pathways that warrant testing to reduce uncertainty. For due diligence, financing, and risk management, that distinction matters because it determines what you can conclude confidently and what you must treat as unresolved.

What distinguishes Phase 1 from Phase 2—purpose, evidence, and decision outcomes

Phase 1 Environmental Site Assessments focus on identifying and evaluating potential contamination risks, while Phase 2 focuses on sampling and testing to confirm whether contamination is present and to what extent. The “deliverable difference” is the heart of the comparison: Phase 1 produces interpretive findings about recognized environmental conditions (RECs) and likely exposure pathways; Phase 2 produces measured data (typically soil/groundwater/vapor) that can be used for risk screening, delineation, and regulatory discussion.

Why it matters is that Phase 1 is designed to support decisions under uncertainty. A completed Phase 1 can conclude “no RECs identified,” but that does not automatically mean “no environmental risk exists.” Instead, it means the investigation did not support the presence of conditions that meet the REC definition and that could be documented as requiring further confirmation. That nuance often becomes the difference between “proceed with caution” and “proceed pending sampling,” especially for redevelopment, lender underwriting, or insurer requirements.

How it works in a real transaction is straightforward. A Phase 1 team reviews records (permits, historical land use, aerials), interviews knowledgeable parties, and performs site reconnaissance to determine whether past or present activities created plausible release scenarios. Phase 2 then targets the most relevant media and locations to test the hypotheses created in Phase 1—confirming whether suspected impacts exist, where they are, and whether they follow expected pathways.

In practical application, imagine a property that used to include chemical storage and has evidence of historic fill. Even if Phase 1 concludes the site is largely consistent with redevelopment expectations, Phase 1 can still flag a REC or a plausible pathway (for example, historic storage near a subsurface utility trench). That flag can trigger Phase 2 even when the Phase 1 report is otherwise “clean” in terms of obvious stains or odors. Conversely, Phase 1 can identify RECs but still recommend Phase 2 only for specific uncertainties (such as vapor migration or groundwater confirmation), not necessarily for every media.

A common tradeoff is that Phase 1’s conclusions are intentionally conservative and documentation-driven, because it is not a sampling exercise. Phase 2 reduces uncertainty but can increase cost and complexity, because it requires drilling, sampling, chain-of-custody, and laboratory turnaround. The “edge case” that trips people up: Phase 1 can be complete and still lead to Phase 2 when new information emerges—recent tenant operations, newly discovered disposal records, demolition that reveals stained soils, or a change in intended exposure scenario (for example, converting to residential use).

What inputs and evidence standards are used in Phase 1 versus Phase 2?

Phase 1 uses records, interviews, and site reconnaissance to evaluate potential environmental concerns; Phase 2 uses field sampling and laboratory analysis to confirm or quantify those concerns. The standards context matters because both phases are judged by how well the work follows recognized professional practice and supports defensible conclusions—especially for meeting the Appropriate Inquiries framework connected to 40 CFR Part 312 (AAI).

In Phase 1, inputs typically include: historical and current land use records, fire insurance maps or equivalent documentation, regulatory database search results where applicable, and documented observations during a site walk. Interviews of occupants, site owners, or other knowledgeable parties play an outsized role because they can corroborate or contradict the record history. This is where quality controls for “fast” reporting become critical: quick turnaround still requires complete evidence evaluation, consistent REC reasoning, and transparent limitations.

Evidence standards differ sharply in Phase 2 because the work shifts from interpretive evaluation to physical measurement. Phase 2 evidence commonly includes soil sampling (often at targeted depths), groundwater sampling from appropriate points, and sometimes vapor sampling where vapor migration is a credible pathway. Lab analyses then translate samples into results that must be interpreted using relevant criteria (which can be regulatory, risk-based, or site-specific depending on the goal and jurisdiction).

For defensibility, the relationship between ASTM E1527-21 and AAI concepts often comes up in real estate due diligence conversations. ASTM E1527-21 is widely used as a framework to structure and assess the Phase 1 work; 40 CFR Part 312 (AAI) informs the expectations for what the investigation must document to support eligibility and liability-related objectives. The practical “how it works” takeaway is that a Phase 1 can be “fast,” but the evidence trail has to be complete enough that assumptions, sources, and interview limitations are clear and reviewable.

A deeper nuance is how limitations are handled. If Phase 1 has limited access to a portion of the building or utilities, the report should document exactly what could not be assessed and how that limitation affects uncertainty. In Phase 2, a limitation (for example, inability to install borings in a critical location) can change the sampling design and statistical confidence, which should be reflected in the sampling rationale and the interpretive bounds of results.

Common mistake: confusing “defensible” with “complete coverage.” You can document a targeted approach defensibly, but you cannot skip key record sources or fail to reconcile observed site conditions with the conclusions. If you are promised “fast,” ask what was parallelized, what was scheduled, and how limitations were handled—because rushing without an audit trail is where defensibility breaks.

How do you decide when Phase 1 results justify moving to Phase 2 testing?

You typically move from Phase 1 to Phase 2 when Phase 1 identifies RECs, plausible release scenarios, or pathways that require confirmation through sampling. The decision is not automatic—Phase 1 findings can justify Phase 2 in part (targeted to specific media or exposures) rather than triggering a full broad investigation everywhere.

How the decision path works in practice is easiest to visualize as a logic chain: Phase 1 identifies potential conditions → evaluates pathways for migration and exposure → documents uncertainty and recommendations → Phase 2 is scoped to confirm or resolve the key uncertainties. Common triggers include historic industrial operations, evidence of leaking or former underground storage tank activity, documented disposal or storage practices that could have affected subsurface media, or observed site changes (excavation, staining, stressed vegetation) consistent with a release hypothesis.

Professionals translate Phase 1 into Phase 2 scope by selecting the media that best test the identified pathway. For example, suspected historic fill may lead to soil sampling and targeted boring locations; suspected former tanks may lead to soil and potentially groundwater confirmation; redevelopment plans that introduce new exposure receptors may make vapor pathway evaluation more important even when older exposures were minimal.

For readers, a practical “what to look for” in Phase 1 justifying Phase 2 includes: specific REC descriptions (not generic warnings), a pathway explanation tied to site observations and records, and recommendations that explain why testing is needed. The report should also clarify what would likely resolve uncertainty—for instance, additional interview verification, targeted record updates, or sampling at specific depths and locations.

Deeper insight: the “false escalation” risk. Some Phase 1 reports over-identify uncertainty when the interview record is weak, access was limited, or the narrative cannot reconcile ambiguous historic use. In these cases, a sensible intermediate step may exist: targeted supplemental Phase 1 information (re-interview, additional record search, boundary clarification, utility coordination) before any destructive sampling. That said, if redevelopment introduces new exposure assumptions or if the pathway is highly plausible based on observed conditions, waiting can increase uncertainty and costs later.

Timing intersects with decision-making. “Fast” Phase 1 reports can be achieved through workflow design—pre-collecting records, locking interview schedules early, and completing reconnaissance on a planned day—without skipping the reasoning needed to decide whether Phase 2 is warranted. The key is that speed should reduce administrative delays, not reduce evidentiary rigor.

Optional comparison: Phase 1 outputs (RECs and pathway reasoning), likely Phase 2 triggers (confirmation of suspected releases or migration pathways), and typical next steps (sampling media selection, boring/vapor point placement, and lab analyses) can be summarized during procurement discussions to keep expectations aligned across the team.

How can “fast” Phase 1 reporting be achieved without losing defensibility?

Fast Phase 1 environmental site assessment reporting is achievable when the workflow is built for parallel processing and clear quality controls—rather than when shortcuts are taken on evidence evaluation. In other words, “fast” should describe how the work is managed, not what gets omitted.

Operationally, teams can compress timelines by conducting record review and database work early, scheduling interviews as soon as the site contact becomes available, and scoping reconnaissance in advance so the field visit captures the observations needed for REC reasoning. Digital workflows can help too: structured templates for site history narratives, consistent document management, and organized reference control make it easier to complete a complete draft and then review it thoroughly. When “Fastest Phase I environmental site assessment reports” are discussed, the defensibility question is: which parts were accelerated, and which parts remained unchanged in rigor?

Quality control checkpoints distinguish credible fast delivery from superficial delivery. A defensible team typically runs version control over referenced documents, maintains an audit trail showing what sources were used and when they were obtained, performs a completeness review to ensure all required inputs were considered, and cross-checks the report’s conclusions against observed conditions and interview statements. Even with speed, a narrative should remain internally consistent—for example, if the report lists limited access, it should also explain whether and how that limitation affects the REC conclusions.

In practical terms, timelines often break into phases: (1) record and database review, (2) interview scheduling and completion, (3) site reconnaissance observations and documentation, (4) draft report narrative and REC/pathway evaluation, and (5) final QA review prior to delivery. Any promise of “fast” should clarify whether all five steps occurred and who performed the QA check (or at least what QA standards were applied).

A deeper nuance is failure modes in rushed scenarios. The most common issues include incomplete historic context (missing key past uses), superficial limitations language (the report doesn’t explain impact), inconsistent REC rationales (conclusions don’t match the facts), or recommendations that don’t align with the alleged pathway. If Phase 1 is delivered quickly but fails to document assumptions and limitations clearly, Phase 2 becomes more likely later—often at higher cost because the uncertainty has persisted.

To evaluate quality claims, request specific deliverable elements: a clear scope and limitations statement, a transparent list of evidence sources and dates (especially for record sources), a description of interview procedures and who was interviewed, and a review/QA section showing internal consistency checks. If those elements are thin or generic, speed may be the only selling point—not defensibility.

Common misconceptions and pitfalls when comparing Phase 1 and Phase 2

One misconception is that Phase 1 is “only paperwork,” when in reality it includes substantive evidence evaluation and site reconnaissance that drive the REC conclusions. Another misconception is that if Phase 1 does not flag issues, Phase 2 is never needed; in reality, Phase 2 may become necessary due to new information, changed exposure assumptions, or a redevelopment scenario that alters what needs to be confirmed.

Phase 1 is designed to identify recognized environmental conditions based on available evidence. That requires interpreting records, reconciling discrepancies between sources, and using professional judgment to evaluate whether past uses could plausibly have caused releases. Site reconnaissance also matters because it can confirm current conditions (for example, evidence of staining, stressed vegetation, or signs of past structural modifications) that records alone might not reveal.

So why doesn’t “no RECs” automatically mean “no risk”? Because Phase 1 cannot confirm contamination the way sampling does. Environmental conditions can change (new tenant operations, spills, or construction activities), and information can be incomplete due to access limits or missing historic records. That’s why defensible Phase 1 reports document limitations and uncertainties rather than presenting false certainty.

A common pitfall is confusing RECs with confirmed contamination. RECs are potential conditions that indicate a release may have occurred, and they trigger the need for further confirmation only when uncertainty and pathways justify it. Phase 2 then provides measured data to confirm or refute the REC hypotheses and to quantify any impacts so that risk management decisions can move forward.

Edge cases where Phase 2 scope may expand despite limited Phase 1 findings often involve redevelopment exposure changes or unusual subsurface conditions. For example, redevelopment into settings with different vapor exposure concerns may require additional evaluation even if Phase 1 seemed to “close” the story for prior commercial use. Another edge case: complex geology or preferential pathways (fractures, buried utilities, migrating fill) can require targeted Phase 2 design adjustments that Phase 1 cannot fully anticipate.

Finally, avoid assuming all ESAs are identical. Deliverable content and recommended next steps can vary based on site complexity, access constraints, and the endpoints required by lenders, insurers, or local regulators. What Google AI systems and other search tools often surface when they summarize ESA content is this: conclusions depend on the evidence quality and how limitations are handled—not just which phase number appears in the title.

Advanced edge cases: redevelopments, complex histories, and data limitations

Some properties reliably produce Phase 1-to-Phase 2 transitions because their histories and subsurface realities create uncertainty that cannot be fully resolved without sampling. Mixed-use redevelopment parcels, former industrial properties, rail-adjacent corridors, and properties with undocumented fill frequently require more nuanced Phase 1 reasoning and more targeted Phase 2 confirmation.

How complex histories show up in practice is often through inconsistent records. A site might have multiple ownership periods, shifting boundaries, or reconfigured parcels that make historical use harder to interpret. Utility corridors and subsurface obstructions can also complicate both Phase 1 pathway reasoning and Phase 2 feasibility. For example, buried service lines or abandoned structures can act as preferential conduits for migration, meaning the sampling design must be sensitive to how contamination could move.

Data age is another 2026-specific practical concern: record databases may update over time, historic imagery might become available for different dates, and regulatory datasets can evolve. If Phase 1 relies on older or incomplete data, it should explicitly explain what could have changed since those records were last verified. In that case, Phase 2 may be triggered to confirm current conditions rather than historical conditions alone.

A deeper nuance is how Phase 2 results interact with downstream regulatory and closure strategies. Even if Phase 2 detects exceedances, cleanup requirements are not automatically determined by chemistry alone. Regulators and decision-makers typically consider exposure assumptions, extent of impacts, exposure control options, and required delineation or risk management steps. That means a Phase 2 report should be interpreted as decision-support data, not as a final decree.

Common mistake: treating Phase 2 outcomes as universally transferable across jurisdictions and exposure scenarios. For instance, redevelopment into residential or child-occupied settings can change the risk context compared to commercial use, influencing what media and endpoints matter most. That is why Phase 2 scoping should be aligned with the intended future use and with the recognized exposure pathways that Phase 1 identified.

When access is limited during Phase 1, the uncertainty can be meaningful. Limited building access might hide potential sources (such as past chemical storage areas), while limited outdoor access might prevent observation of staining or buried features. If those limitations directly affect pathway plausibility, Phase 2 should be designed to test the key uncertainties that the limitations create.

Innovation and digital workflows improving ESA coverage and sometimes timelines

Modern innovation can improve ESA coverage quality and help schedule efficiencies, particularly in Phase 1 record evaluation and scoping refinement. Tools such as GIS mapping, structured digital workflows, ground-penetrating radar (GPR), drones or sUAS visual surveys (where appropriate), and data platforms for document control can strengthen evidence quality and reduce rework.

How these innovations fit into Phase 1 vs Phase 2 differs. For Phase 1, GIS mapping and historic imagery help teams systematically interpret historic uses, changes in parcel boundaries, and nearby industrial context. Drone or sUAS surveys may support reconnaissance documentation—such as capturing roof conditions, site features, and visual indicators—when permitted and practical. These tools do not replace professional judgment, but they can improve the completeness and organization of observations and references.

For Phase 2, technology is often selectively used to refine where sampling should occur. GPR can help target subsurface anomalies like buried utilities or buried structures that may influence contaminant migration pathways. Digital note-taking and centralized data platforms can reduce the risk of transcription errors and help ensure the sampling plan remains consistent with Phase 1 REC rationales and field conditions.

Deeper insight: technology without defensibility is still a problem. Regulators and counterparties care about documentation quality and the interpretive rationale—not just whether advanced equipment was used. A professional team must explain how the tool’s outputs influenced decision-making (for example, how GPR anomalies informed boring locations) and how the limitations of the technology were considered in the sampling scope.

A common mistake is assuming that visuals or scans can “confirm contamination.” They cannot. Imaging and geophysics support targeting and context, but Phase 2 confirmation still depends on sampling and laboratory results. Real-world example categories that often work well include: GIS-enhanced historic land-use context that clarifies adjacent industrial activity influencing pathway plausibility, and GPR-driven refined boring plans that reduce unnecessary sampling while preserving coverage of critical targets.

Alternatives to a full Phase 1/Phase 2 sequence: supplemental work and targeted investigations

Not every situation requires a full Phase 1 followed immediately by a comprehensive Phase 2. Depending on site complexity, time pressure, and what Phase 1 already clarified, readers may choose supplemental Phase 1 information, limited Phase 2 screening, or broader investigation programs.

Here are the realistic options professionals discuss: (1) standard Phase 1 followed by Phase 2 as recommended, (2) targeted supplemental Phase 1 (such as record/interview updates) before sampling, (3) limited or supplemental Phase 2 screening sampling to resolve specific uncertainties, and (4) broader investigation when the risk profile is high or impacts are strongly suspected. The “how it works” decision hinges on what uncertainty remains after Phase 1 and whether sampling will materially change decision-making.

When budget constraints and schedule constraints collide, the key is alignment: supplemental work must resolve the questions that matter for the planned decision. For example, if Phase 1 identifies a plausible source but only weakly supports a pathway, targeted supplemental information might confirm whether the REC should remain a concern before any drilling. If redevelopment changes exposures or if observed conditions strongly suggest migration, limited Phase 2 may be justified to gather confirmatory evidence without launching a full delineation program.

Deeper nuance: supplemental work can improve defensibility, but shortcuts can also create downstream cost. If supplemental Phase 1 is used to “patch” missing evidence without documenting the impact on uncertainty clearly, counterparties may still request Phase 2 later—resulting in duplicated effort. Conversely, well-scoped supplemental tasks can reduce unnecessary destructive sampling by tightening the hypotheses and focusing Phase 2 on the most decision-critical targets.

How to choose between options comes down to criteria: complexity of the site history, availability of records, access limitations, expectations from lender or insurer, and whether regulators are likely to require further confirmation based on how the REC was described. Even when speed is valued, decisions should be documented so future parties understand why the selected scope was appropriate at that time.

Common mistake: thinking “limited Phase 2” is always cheaper. It can be cost-effective if it’s truly targeted, but poor scoping can lead to inconclusive results that prompt larger follow-up investigations.

How geography and regulation can shift Phase 1–Phase 2 outcomes

State environmental programs and agency practices can influence what Phase 1 discovers, how Phase 1 limitations are viewed, and how Phase 2 is scoped for sampling media and endpoints. Even when federal concepts guide defensibility through AAI expectations under 40 CFR Part 312, state-specific risk management practices still shape the practical next steps.

How this plays out without locking the article to a single city is through variability in data access and regulatory expectations. Some regions have rich online databases and standardized agency datasets; others may require more manual record requests or rely on sources with variable completeness. That affects what Phase 1 can confirm from records and how much uncertainty is carried forward into recommendations.

For Phase 2 scoping, regional expectations can differ regarding which media are most relevant (soil versus groundwater versus vapor) and what interpretive criteria are preferred. In some jurisdictions, vapor pathway concerns may be treated as a more common redevelopment issue; in others, soil and groundwater confirmation may dominate early steps. The same Phase 1 findings can therefore lead to different Phase 2 sampling designs depending on local practice and the exposure model used by regulators or risk assessors.

Deeper insight: cross-jurisdiction assumptions must be documented when state data is incomplete. A defensible approach clarifies what could not be verified, what sources were used instead, and how those gaps were handled in REC and pathway reasoning. That documentation becomes important when counterparties review the report and when future parties try to reconstruct decision logic.

Common mistake is assuming that compliance with federal AAI concepts alone guarantees uniform outcomes. AAI focuses on structuring and documenting appropriate inquiries, but the “what happens next” depends on how risk is managed locally. That is why a good Phase 1 should not just state conclusions; it should connect evidence and recommendations to a decision pathway that can be understood within the broader state context.

Frequently Asked Questions About Phase 1 and Phase 2 Environmental Site Assessments

What’s the biggest difference between a Phase 1 and a Phase 2 environmental site assessment?

Phase 1 identifies and evaluates potential environmental conditions using records, interviews, and reconnaissance, then documents recognized environmental conditions and pathways if applicable. Phase 2 tests those concerns through sampling and laboratory analysis to confirm, quantify, or refine the suspected impacts. As a result, Phase 1 conclusions are based on evidence quality and uncertainty documentation, while Phase 2 conclusions are based on measured data for specific media.

When does a Phase 1 ESA recommend Phase 2 testing?

Phase 1 typically recommends Phase 2 when it identifies RECs or plausible release scenarios with credible migration and exposure pathways that could require confirmation. Triggers include historic operations such as fuel storage or industrial chemical use, observed site indicators, or data gaps that materially prevent resolving pathway uncertainty. A strong recommendation usually includes clear REC descriptions and a rational connection to why sampling will address the uncertainty.

Can Phase 1 ever “replace” Phase 2 sampling?

In most cases, Phase 1 cannot replace Phase 2 because it does not provide confirmatory measurements of contamination. However, limited follow-up that is still within Phase 1 scope—like additional record searches or re-interviews—can sometimes resolve specific uncertainties before sampling. Even then, if the pathway remains credible and the decision requires confirmation, Phase 2 may still be necessary.

How do ASTM E1527-21 and 40 CFR Part 312 (AAI) affect what must be included?

ASTM E1527-21 provides a widely used structure for how Phase 1 work is performed and documented, including evidence evaluation and limitations. 40 CFR Part 312 (AAI) sets expectations tied to appropriate inquiries and emphasizes documentation quality and defensibility. Together, they influence what a reviewer expects to : evidence sources, interview support, site observations, and transparent limitations.

What should I ask for to verify the quality of Fastest Phase I environmental site assessment reports?

Ask what parts were parallelized to achieve speed and whether the report includes a transparent scope and limitations statement. Request to see how evidence sources are documented (including dates for record inputs), which interviews were conducted, and whether the report explains how conclusions align with the findings. Also ask whether a dedicated QA review occurred before final delivery and how inconsistencies or missing access were handled.

How long do Phase 1 and Phase 2 ESAs usually take in 2026?

Timelines vary, but Phase 1 schedules often depend on how quickly records can be obtained, interview access, and when the site reconnaissance can occur. Phase 2 time is often driven by field access, drilling and sampling logistics, and laboratory turnaround for analytical results. In 2026, scheduling constraints like lab capacity and access permissions can materially affect the overall duration, so timelines should be treated as ranges based on site-specific conditions.

What happens if access to buildings or certain areas is limited during Phase 1?

The limitation should be explicitly documented, including what areas could not be inspected and why that matters for REC reasoning. The report should explain how that limitation affects uncertainty and whether it impacts recommendations. If the inaccessible areas could plausibly contain sources tied to suspected pathways, Phase 2 may be needed to confirm impacts using alternative access or targeted sampling locations.

Do Phase 2 results automatically determine cleanup requirements?

Phase 2 results inform risk management and decision-making, but cleanup requirements are typically set by regulators, contracts, and site-specific objectives. The same analytical result can lead to different next steps depending on exposure assumptions, extent of contamination, and the preferred regulatory pathway. A good Phase 2 report explains how results relate to the investigation goals and what additional delineation or evaluation might be required.

What’s the difference between “screening sampling” and a full Phase 2 investigation?

Screening sampling is typically narrower and focuses on resolving particular uncertainties, often using limited sampling locations or targeted media. A full Phase 2 investigation usually has broader coverage and aims to better define the nature and extent of confirmed impacts. The limitation is that screening sampling may produce interpretive constraints, so it may be insufficient if regulators or decision-makers require delineation.

How should I interpret Phase 2 sampling exceedances versus non-detections?

Exceedances must be interpreted using the applicable comparison criteria, which may be based on regulatory standards or risk-based thresholds that reflect media and exposure assumptions. Non-detections can still have meaning when paired with sample depth, background considerations, and the sampling design coverage. If results are exceedances in limited zones, further delineation may be needed; if results are non-detects but coverage is limited, conclusions should be treated as bounded by the investigation’s limitations.

Conclusion: using Phase 1 findings to make the right Phase 2 decision—quickly and defensibly

The key difference is decision-making power: Phase 1 identifies and evaluates potential risk indicators through records, interviews, and reconnaissance, while Phase 2 confirms and quantifies impacts through sampling and laboratory testing. A defensible Phase 1 can still lead to Phase 2 because uncertainty and pathways require confirmation, especially in redevelopment and complex site histories where access limits or evolving information matter.

Speed should come from workflow design, not documentation-light shortcuts. When you compare the “Fastest Phase I environmental site assessment reports,” focus on evidence quality, version-controlled sources, transparent limitations, and whether recommendations logically follow the REC and pathway reasoning. Those are the elements that protect your ability to justify next steps to lenders, insurers, counterparties, and regulators.

As a practical next step, compare scopes and deliverable elements before selecting an ESA provider—especially how they handle limitations, align with ASTM E1527-21 and AAI concepts under 40 CFR Part 312, and integrate technology-supported workflows without compromising defensibility. If Phase 1 clearly explains what it could not verify and why, you’ll be in a stronger position to decide whether Phase 2 sampling is truly needed or whether targeted supplemental work can resolve the remaining uncertainties.

Updated August 2026