Controlled Recognized Environmental Conditio

On November 1, ASTM International (ASTM) released a revised standard for conducting Phase I Environmental Site Assessments (Phase I ESAs). The new standard – ASTM E1527-21 – establishes new requirements for complying with the “All Appropriate Inquiry” (AAI) rule in 40 CFR Part 312. The AAI is an essential element of environmental due diligence used