What is a Phase I environmental site assessment?

What a Phase I includes

Under 40 CFR Part 312, the inquiry covers interviews with past and present owners, operators, and occupants, reviews of historical sources such as aerial photographs and fire insurance maps, reviews of federal, tribal, state, and local government records, a visual inspection of the property and adjoining properties, and a search for recorded environmental cleanup liens. The results go into a written report with the environmental professional's opinion on whether conditions indicative of releases or threatened releases of hazardous substances were found.

A Phase I does not test anything. When the report identifies a recognized environmental condition, the usual next step is a Phase II assessment that samples soil, groundwater, or soil vapor to measure what is actually there.

Which standard applies: ASTM E1527-21

Section 312.11 of the rule lists ASTM E1527-21 as an industry standard that may be used to comply with the All Appropriate Inquiries requirements. It also lists ASTM E2247-23 for forestland and rural property. The rule allowed the older ASTM E1527-13 only until February 13, 2024, so a report prepared under E1527-13 today does not carry that recognition.

EPA describes E1527-21 as consistent with the requirements of the final AAI rule and usable to satisfy the statutory requirements. For a buyer, completing AAI is 1 of the requirements for asserting the CERCLA landowner liability protections for bona fide prospective purchasers, contiguous property owners, and innocent landowners.

How old can a Phase I be?

The federal rule sets 2 clocks relative to the acquisition date. The inquiry must be conducted within 1 year before acquisition. 5 components must be conducted or updated within 180 days before acquisition: the interviews, the environmental lien search, the government records review, the visual inspections, and the environmental professional's declaration.

Lenders set their own freshness requirements on top of that, and those vary by lender and program. A report that is fine for the buyer's liability protection may still need an update before a refinance or a loan closing months later.

Why lenders require a Phase I

• Collateral value. Contamination can make a property harder to sell or refinance and can reduce what the lender recovers after a default
• Borrower capacity. Cleanup costs can drain the cash flow and liquidity that support the loan and guarantees
• Reliance. Lenders typically require a report they can rely on, either addressed to them or covered by a reliance letter from the consultant
• Loan documents. Environmental indemnities and covenants are written around what the Phase I found
• Property type. Gas stations, dry cleaners, auto service, and industrial sites get closer review because of their historical uses

How a Phase I finding affects a loan

A clean report usually clears the environmental condition of the loan. A finding does not automatically kill financing. Depending on severity, lenders may require a Phase II, a cleanup plan with cost estimates, a regulatory closure letter, an escrow or holdback, environmental insurance, or a stronger indemnity from the sponsor.

Timing is the practical risk. A Phase II and regulatory review can take longer than a purchase contract's due diligence period, so order the Phase I early, especially on gas stations and industrial property.

The Phase I also travels with the rest of the due diligence package, including entitlements for development sites and the rent roll for income property. The construction underwriting guide places environmental status inside the full development review. When the reports are in hand, submit the deal for review.

Common questions