Brownfield Due Diligence: A Developer's Checklist

What Is a Brownfield?

Under the EPA's definition, a brownfield is 'real property, the expansion, redevelopment, or reuse of which may be complicated by the presence or potential presence of a hazardous substance, pollutant, or contaminant.' In practice, this includes former gas stations, dry cleaners, auto repair shops, manufacturing plants, rail yards, military bases, and any property with a history of industrial use.

Brownfields are NOT automatically contaminated — many have only 'suspected' contamination and turn out to be clean after investigation. But the risk of unknown contamination affects acquisition price, financing, and development timeline. Understanding the brownfield process is essential for pricing and managing that risk.

Phase I ESA — The First Step

A Phase I Environmental Site Assessment (ESA) is the standard first step in brownfield due diligence. Conducted under ASTM Standard E1527-21, a Phase I ESA involves:

Records review: Reviewing historical aerial photographs, Sanborn fire insurance maps, regulatory agency records, and environmental databases to identify Recognized Environmental Conditions (RECs). Site reconnaissance: A physical inspection of the property and adjacent properties by an environmental professional. Interviews: Discussions with current and former owners, occupants, and local government officials. Report: A written report identifying any RECs — conditions that indicate potential contamination.

A Phase I ESA typically costs $2,000–$5,000 and takes 2–4 weeks. It is required by most lenders before financing a commercial property transaction. Completing a Phase I ESA also establishes an 'innocent landowner defense' under CERCLA if contamination is later discovered — provided the ESA was conducted before acquisition.

Phase II ESA — When RECs Are Found

When a Phase I ESA identifies one or more RECs, a Phase II ESA is typically recommended. A Phase II ESA involves physical sampling — soil borings, groundwater monitoring wells, and laboratory analysis — to determine whether contamination actually exists and, if so, its extent and concentration.

Phase II ESA results determine: Whether cleanup is required (and under what state or federal program) What cleanup standards apply (industrial vs. residential standards differ significantly) Estimated cleanup cost Whether the site can be developed as planned

Phase II ESAs typically cost $10,000–$100,000+ depending on site size, number of samples required, and the complexity of the contamination scenario.

State Voluntary Cleanup Programs (VCPs)

Every state has a Voluntary Cleanup Program (VCP) — also called a Brownfield Program — that provides a regulatory framework for cleaning up contaminated sites outside of federal Superfund enforcement. Key features:

Liability protection: Upon successful completion of cleanup under a VCP, the state issues a No Further Action (NFA) letter or a Certificate of Completion providing legal protection against future enforcement for the contamination that was addressed. Cleanup standards by use: VCPs typically allow cleanup to industrial/commercial standards (less stringent than residential) when the intended use doesn't involve residential occupancy. This significantly reduces cleanup cost. Activity and Use Limitations (AULs): If cleanup is conducted to industrial standards, the VCP may impose an AUL — a recorded deed restriction limiting future use (no residential, no groundwater extraction). AULs run with the land and must be disclosed to future buyers.

Examples: Florida's BUSTR and FDEP Voluntary Cleanup Program, Texas VCP, Ohio VAP, Pennsylvania Act 2.

EPA Brownfields Program Grants

The EPA's Brownfields Program offers significant grant funding to support assessment and cleanup:

Assessment Grants: Up to $500,000 per grant for conducting Phase I and Phase II ESAs on brownfield properties. Available to states, tribes, local governments, and nonprofit organizations. Cleanup Grants: Up to $500,000 per site (non-profits and governmental entities can receive up to $1M) for carrying out cleanup activities at brownfield sites. Revolving Loan Fund (RLF) Grants: Up to $2M for establishing loan programs to fund brownfield cleanup. Multipurpose Grants: Up to $3.5M for communities to conduct assessment and cleanup activities.

The EPA awards Brownfields grants on a competitive basis annually. Many states also have their own brownfield grant and loan programs that supplement federal funding.

Brownfield Due Diligence Checklist

Use this checklist when evaluating a site with brownfield potential:

Identify potential RECs: Review the property's historical use via aerial photographs, Sanborn maps, and regulatory databases. Flag any prior industrial, gas station, dry cleaner, or manufacturing use.

Commission a Phase I ESA: Hire a qualified environmental professional (EP) under ASTM E1527-21. Confirm the EP carries professional liability (E&O) insurance.

Review Phase I findings: Determine whether RECs were identified. For each REC, assess the significance and likely Phase II scope.

Commission a Phase II ESA if warranted: Define the sampling plan with your EP. Prioritize areas of highest risk (underground storage tanks, floor drains, loading docks).

Engage with the state VCP: Identify the applicable state VCP and determine whether enrollment is advantageous (liability protection, regulatory oversight, cleanup standard certainty).

Evaluate AUL implications: Determine whether cleanup to industrial standards is acceptable for your intended use, and document the AUL requirements.

Assess EPA grant eligibility: Determine whether the project qualifies for EPA Brownfields Assessment or Cleanup Grants — particularly for affordable housing, public use, or nonprofit development.

Factor cleanup cost into acquisition: Price the cleanup cost and timeline into your acquisition price, pro forma, and financing structure.

Require seller disclosure: Obtain all available environmental reports from the seller. Review any prior VCP enrollments, NFA letters, or AULs recorded against the property.

Key Takeaways

• A Phase I ESA is the required first step and establishes innocent landowner liability protection under CERCLA.
• Phase II ESAs involve physical sampling — don't skip them when RECs are found.
• State VCPs provide liability protection and allow cleanup to industrial (less costly) standards.
• Activity and Use Limitations (AULs) recorded after VCP cleanup run with the land and limit future use.
• EPA Brownfields grants offer up to $500K for assessment and $500K+ for cleanup — significant free money for qualifying projects.