Standards & guidance · Defined
ASTM E1527 — Phase I ESA
An ASTM practice for Phase I environmental site assessments of commercial real estate, focused on identifying recognized environmental conditions.
Standards references reviewed September 15, 2026. These summaries explain purpose, not the full standard. Confirm the edition required by your contract, program, and jurisdiction; publication of a newer edition does not automatically change local requirements.
Why it matters
E1527-21 is a recognized route for conducting All Appropriate Inquiries under EPA’s rule. Completing the inquiry is not, by itself, a guarantee of liability protection or proof that contamination is absent.
In practice
A project example
An acquisition team confirms the assessment’s scope and timing and separately addresses its user responsibilities.
Technical references
General educational guidance from KOW Building Consultants. Examples are illustrative, not project records. The applicable contract, standard, program, and jurisdiction control the requirements for a specific assignment.