The U.S. Environmental Protection Agency (EPA) has finalized the revision of ASTM E1527 "Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process.”
The revised EPA rule E1527-13 does not cancel out ASTM standard E1527-05. Both standards are acceptable.
The definition of a Recognized Environmental Condition (REC) has been simplified to be more consistent with the All Appropriate Inquiries rule and would include “any release to the environment.”
The environmental assessment industry will also have to understand and adopt a new term – “Controlled Recognized Environmental Condition” (or CREC) — which applies to risk-based closures of contaminated sites.
ASTM 1527-13 also includes a definition of “migration”, which refers to the movement of contaminants in any form, including vapor.