Frequently asked questions
What is a Phase 1 Environmental Site Assessment?
It's a non-intrusive investigation into a commercial property's environmental history, records review, a site visit, and interviews, built to identify whether the property carries contamination risk from a past use. No samples are collected in a Phase 1; that's a separate Phase 2 ESA.
Source: ASTM International, E1527-21 Standard Practice for Phase I Environmental Site Assessments.
How much does a Phase 1 ESA cost?
Nationally, a standard commercial Phase 1 ESA runs about $2,000 to $4,500, with a reported average of $3,250. The number varies by state and property history; see our full cost data for the state-by-state breakdown.
How long does a Phase 1 ESA take?
Standard turnaround is 2 to 4 weeks from authorization to final report. Rush service is available from most firms in 5 to 10 business days for a fee.
Do I need a Phase 1 ESA to buy commercial property?
It's not a direct legal requirement, but nearly every commercial lender requires one before funding a purchase or refinance, and completing one properly is how a buyer qualifies for CERCLA liability protection.
Source: U.S. EPA, Superfund Landowner Liability Protections.
What's the difference between a Phase 1 and Phase 2 ESA?
A Phase 1 ESA investigates whether a property is at risk of contamination through records and observation, with no physical sampling. A Phase 2 ESA collects and tests actual soil, groundwater, or building material samples, and it only happens when the Phase 1 finds a reason to look closer.
Is it free to request quotes through this site?
Yes. Requesting quotes is free and there is no obligation. Your details are only used to connect you with Phase 1 ESA providers serving your area.
Does Phase 1 ESA Quotes perform the assessment itself?
No. We're an independent resource that connects you with environmental consulting providers. We don't conduct assessments and we don't publish provider phone numbers or websites directly; you request quotes and providers contact you.
What standard does a Phase 1 ESA have to meet?
ASTM E1527-21 is the current standard, and since February 13, 2024 it's the only version the EPA recognizes for CERCLA liability protection under the All Appropriate Inquiries rule.
Source: von Briesen & Roper, ASTM E1527-21 Is Now Required to Meet CERCLA Liability Protections.