Status of the Revised E1527 Standard for Phase I Environmental Site Assessments
USEPA is currently working to address public comments before issuing a direct final rule approving the new ASTM standard (ASTM E1527-21) for Phase I Environmental Site Assessments (ESAs). The current E1527-13 standard will remain an approved method for conducting the all appropriate inquiry (AAI) component for potential liability protections under the Comprehensive Environmental Response, Compensation, and