Environmental Diligence Basics for Industrial Sellers

For manufacturing, distribution, and other industrial businesses, the value tied up in real property and equipment often comes bundled with a question buyers ask early: what is the environmental condition of the site, and who carries responsibility for anything found there. Environmental review has become a standard workstream in lower and middle market industrial deals, and unresolved issues can slow a process, reshape price, or move risk onto escrow and insurance. Understanding the basic mechanics helps owners see what a buyer's advisors will likely request and why.

What environmental diligence covers in an industrial sale

Environmental diligence is the buyer-side process of evaluating whether a property or operation carries contamination, regulatory noncompliance, or cleanup obligations that could transfer with the deal. It typically runs alongside financial, legal, and commercial review. For sites with a history of chemical handling, fabrication, coating, plating, or fuel storage, this review often carries more weight than at a pure office or retail property. The work generally proceeds in phases, starting with records and observation before any physical sampling occurs.

• Property condition: soil, groundwater, and vapor conditions beneath and around the site.
• Operational compliance: permits, waste handling, air and water discharges, and recordkeeping.
• Historical use: what happened on the land before the current owner, which can matter under strict-liability rules.

The reason this workstream carries weight is that environmental exposure sits at the intersection of price, timing, and legal risk. A finding can translate into a holdback, a purchase price adjustment, or a survival period for indemnities that runs longer than for other representations. It can also lengthen the closing timeline when sampling or agency correspondence is required. Buyers, and their lenders, tend to treat the environmental record as a gating item rather than a detail, so the condition of these materials often shapes how smoothly the middle of a process runs.

The Phase I ESA and the ASTM E1527-21 standard

A Phase I Environmental Site Assessment is the common first step. It is a records and observation review, not a sampling exercise, and it aims to identify what practitioners call Recognized Environmental Conditions, meaning the presence or likely presence of hazardous substances or petroleum products that suggest a past or current release. A Phase I generally includes a historical review using aerial photographs, fire insurance maps, city directories, and title records, a search of federal, state, and local regulatory databases, interviews with owners and occupants, and a visual site inspection performed by a qualified environmental professional.

The governing benchmark is ASTM standard practice E1527-21. The U.S. Environmental Protection Agency recognizes that standard as satisfying its All Appropriate Inquiries rule under 40 CFR Part 312, and as of February 13, 2024 the EPA no longer accepts the prior E1527-13 version for that purpose. A Phase I is generally treated as current when it is less than one year old, with certain components refreshed if more than 180 days have passed. The standard also places some emerging contaminants, including certain per- and polyfluoroalkyl substances known as PFAS, outside its default scope, though buyers increasingly evaluate them separately because the EPA has designated certain PFAS compounds as CERCLA hazardous substances.

When a Phase II ESA follows

A Phase I that identifies one or more Recognized Environmental Conditions often leads to a Phase II assessment. Where a Phase I is a paper and walkthrough review, a Phase II involves physical investigation: sampling of soil, groundwater, soil vapor, or building materials to confirm whether contamination is present and, if so, at what concentrations. This is the step that turns a suspicion into measured data. Phase II results can influence a transaction in several ways, from informing a purchase price adjustment to defining the scope of a cleanup obligation. Because sampling takes time and site access, it can extend a deal timeline, which is one reason buyers often raise environmental questions early.

Common findings at manufacturing and industrial sites

Certain issues recur at industrial properties because of how the sites were historically used. A review of the property record and physical conditions frequently surfaces items in the following categories.

• Underground and aboveground storage tanks: current or former tanks holding fuel, solvents, or process chemicals, which can leak over decades.
• Historical operations: degreasing, parts cleaning, plating, and solvent use areas that may have released chlorinated compounds.
• Disposal infrastructure: floor drains tied to older disposal systems, former waste storage areas, and unlined pits or lagoons.
• Hazardous materials in structures: asbestos, lead-based paint, and polychlorinated biphenyls in older equipment or building components.
• Observable indicators: staining, chemical odors, stressed vegetation, and contamination migrating from neighboring parcels.

Many of these findings are manageable, and their significance depends on the substance, the volume, the pathway to soil or water, and the applicable state cleanup standard. Not every Recognized Environmental Condition points to a costly remediation.

Permits that travel with the operation

Beyond soil and groundwater, industrial operations usually run under a set of environmental permits, and buyers examine whether those permits are current, transferable, and being followed. Several federal programs commonly apply, alongside state-administered versions of each.

• RCRA: the Resource Conservation and Recovery Act governs hazardous waste generation, storage, and disposal, and a facility's generator status and waste manifests are frequently reviewed.
• Clean Air Act: facilities with significant emissions may hold operating permits, sometimes called Title V permits, tied to specific equipment and limits.
• Clean Water Act: discharges to surface water or to a municipal system may require a National Pollutant Discharge Elimination System permit or a pretreatment authorization, and stormwater permits often apply to industrial yards.

Permit transfer rules vary by program and by state, and a stock sale, an asset sale, or a name change can each carry different notification or reissuance requirements. Gaps between permitted limits and actual practice are a common diligence finding.

CERCLA and successor-liability concepts at a high level

The federal Superfund statute, formally the Comprehensive Environmental Response, Compensation, and Liability Act, imposes strict, and often joint and several, liability for cleanup on current owners and operators of contaminated property, even when the current party did not cause the contamination. That framework is why historical site use matters and why buyers invest in diligence. Federal law provides certain defenses, including the innocent landowner defense, the contiguous property owner defense, and the bona fide prospective purchaser defense, each of which generally depends on having conducted All Appropriate Inquiries that a compliant Phase I is designed to satisfy.

Deal structure interacts with this exposure but does not fully control it. A stock purchase generally carries the target entity's liabilities to the buyer as successor. An asset purchase can allow a buyer to leave defined liabilities behind, yet courts have applied successor-liability theories, such as de facto merger, mere continuation, and continuity of enterprise, to reach asset buyers, particularly where the buyer continues the same business at the same location. State environmental laws add another layer that can operate independently of the federal rules, and some states require their own transfer-triggered disclosures or cleanup filings when an industrial property or business changes hands.

Because these mechanisms overlap, buyers and sellers commonly address residual risk through the purchase agreement rather than diligence alone. Representations and warranties about environmental compliance, indemnities that survive closing, escrow arrangements, and, in some transactions, pollution legal liability insurance are the tools used to allocate exposure that cannot be fully resolved before signing. How that allocation lands is a negotiated outcome that depends on the findings, the parties, and the structure.

Preparation steps ahead of a sale process

Owners of industrial businesses often find that environmental questions surface with less friction when the underlying records are organized before a process begins. Common preparation items include locating prior environmental reports, tank registrations and closure records, waste manifests, and current permits, and confirming that filings and renewals are up to date. Where a known condition exists, understanding its regulatory status and any open cleanup obligations tends to reduce surprises during diligence. Some sellers commission a Phase I on their own ahead of a sale so that findings are understood before a buyer's advisors arrive. Platforms that manage a structured sell-side process, such as Bankerly, typically organize these materials within a data room so that diligence requests can be answered from a single, consistent record. The general aim is to make the environmental picture legible rather than to predetermine any outcome.

Educational scope and professional review

This article is educational and is not environmental, engineering, legal, or tax advice. Environmental liability turns on site-specific facts, the substances involved, and federal and state rules that change over time, and the summaries here simplify concepts that carry meaningful nuance in practice. Assessments of a specific property, permit, or transaction structure are matters for licensed environmental professionals and qualified legal counsel engaged on the facts of a given deal.

Sources

• U.S. EPA - Brownfields All Appropriate Inquiries
• Katten Muchin Rosenman LLP - New ASTM Standard for Phase I Environmental Site Assessments Takes Legal Effect
• Wyrick Robbins Yates & Ponton LLP - Environmental Considerations in M&A Transactions
• Acquisition Stars - Environmental Diligence in Manufacturing Acquisitions: Phase I, II, and Liability