Phase 1 environmental site assessment (ESA)
A Phase 1 environmental site assessment is a due-diligence investigation of a commercial property’s environmental history and current conditions, performed to the ASTM E1527-21 standard before purchase. It identifies recognized environmental conditions (RECs) and — done correctly — qualifies buyers for CERCLA landowner liability protections.
What does a Phase 1 environmental site assessment include?
Four components, defined by ASTM E1527-21: a records review (federal and state environmental databases, historical aerials, fire insurance maps, city directories — reconstructing what the site has been since first development); a site reconnaissance walking the property and adjoining uses for stains, tanks, drums, vents, fill, and drains; interviews with owners, occupants, and local agencies; and a report by an Environmental Professional (as defined in EPA’s All Appropriate Inquiries rule) stating whether recognized environmental conditions exist. No sampling occurs in a Phase 1 — that is what a Phase 2 is for, if warranted.
Why do you need one before buying commercial property?
Because under CERCLA, property owners can inherit cleanup liability for contamination they did not cause. A compliant Phase 1, completed before closing, is what establishes the innocent landowner and bona fide prospective purchaser defenses. Lenders require one for most commercial deals for the same reason. Skipping it to save a few thousand dollars is how buyers end up owning six-figure remediation problems.
How long does a Phase 1 ESA take and what does it cost?
Standard turnaround is 15–20 business days; expedited 10-day delivery is available for deal deadlines. Pricing runs $1,800–$4,500 for typical commercial and light-industrial properties, quoted fixed once we see the parcel. Note the shelf-life rules: key components must be updated after 180 days, and the full report is only presumed valid for one year.
What happens if the Phase 1 finds something?
A REC is information, not a verdict. Options include a scoped Phase 2 subsurface investigation to bound the issue, price adjustments, escrows, environmental insurance, or — in Ohio — the Voluntary Action Program pathway. We give you a plain-language read on deal impact with every finding, because a REC paragraph without context just kills transactions unnecessarily.
Related services
Frequently asked questions
What is a recognized environmental condition (REC)?
The presence or likely presence of hazardous substances or petroleum at a property due to a release, past release, or material threat of one — the formal ASTM term for “something that could mean contamination.” Historical RECs (cleaned up to standards) and controlled RECs (managed with use restrictions) are related but distinct findings.
Does a clean Phase 1 guarantee the property is clean?
No — it is a records-and-reconnaissance investigation, not a sampling event, and it establishes that you made all appropriate inquiries, which is what the liability protection turns on. It materially reduces risk; it does not zero it.
Do I need a Phase 1 for a refinance or lease?
Lenders frequently require them on refinances. Tenants signing long industrial leases increasingly order them too — a baseline assessment protects you from inheriting blame for a prior tenant’s releases. If liability can attach to your position, diligence is worth pricing.
What is the difference between Phase 1 and Phase 2?
Phase 1 is investigation without sampling; Phase 2 is intrusive — soil borings, groundwater wells, vapor sampling — scoped to test the specific RECs a Phase 1 identified. Most properties never need a Phase 2; when they do, scoping it narrowly is where diligence budgets are saved.
Can you meet a closing deadline in two weeks?
Usually, yes — expedited 10-business-day delivery is available when the database order and site access are arranged immediately. Call (614) 555-0142 with the parcel address and closing date and we will confirm feasibility the same day.