Environmental · Defined
Historical recognized environmental condition (HREC)
An ASTM Phase I ESA classification for a qualifying past release that has been addressed to the relevant unrestricted-use criteria, as evaluated under the applicable practice.
Why it matters
A historical closure letter alone does not establish the classification. The environmental professional reviews the closure basis and whether current criteria or other information change the conclusion. Restrictions left in place may require a different classification.
In practice
A project example
An old release was closed by an agency. The assessment checks the closure conditions rather than assuming the word closed means unrestricted use.
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.