On December 30, 2013, the United States Environmental Protection Agency approved the most recent American Society for Testing and Materials Standard E1527-13 as sufficient to satisfy “All Appropriate Inquiry” for potential liability protections under the Comprehensive Environmental Response, Compensation, and Liability Act. 78 Fed. Reg. 79,319. As a result, E1527-13 now stands as the baseline for Phase I Environmental Site Assessments and any individuals performing Phase I ESAs should ensure that their assessments are in compliance with that standard going forward.