Environmental

The Environmental Site Assessment (ESA) process was standardized by ASTM International. What is the current standard for Phase I ESAs?

AASTM E1527-05
BASTM E1527-21 (or the most recent revision)✓ Correct
CASTM E2600-10
DEPA 9045D

Explanation

ASTM E1527-21 (2021) is the current standard for Phase I Environmental Site Assessments, replacing earlier versions. This standard defines 'All Appropriate Inquiries' (AAI) for CERCLA liability protection purposes.

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