What is a Phase I environmental site assessment? 

A Phase I environmental site assessment (ESA) is a report prepared for real estate holdings. It identifies potential or existing environmental contamination liabilities. Additionally, the purpose of a Phase I ESA is to avoid legal liability for pre-existing contamination.

Peace Environmental constructs reports that meet and, in many cases, exceed the requirements listed in ASTM E1527-21.

Under CERCLA, landowners are liable for any pre-existing contamination, even if they are not the cause of it.

A Phase I ESA is generally considered to be the first step in the process of environmental due diligence. The results of a Phase I ESA determine if sampling and additional investigation are necessary.

Frequently Asked Questions:

What kind of information is in a Phase I ESA?

The basic components of a Phase I ESA include:

  • A visual site inspection
  • Interviews with anyone who may have relevant information about the site
  • A review of property records, which typically includes:
    • Chain of title review
    • Examination of surrounding land use
    • Review of any existing aerial photography records
    • A search of agency records
  • Completion of a comprehensive report

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