Phase I ESA (environmental site assessment)
A Phase I environmental site assessment is a non-invasive review of a property’s current and past uses to identify recognized environmental conditions, performed to the ASTM E1527-21 standard. It includes records research, a site visit and interviews. A compliant Phase I supports landowner liability protections under federal law, and its findings decide whether sampling in a Phase II is warranted.
The full guide · Environmental & physical riskPhase I Environmental Site Assessments for Data Center LandWhat a Phase I Environmental Site Assessment covers under ASTM E1527-21, what RECs mean, how PFAS and rural tracts are handled, and when a Phase II follows.Where Phase I ESA comes up
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