Environmental

Wisconsin's 'all appropriate inquiries' (AAI) standard for a Phase I ESA requires:

ASoil testing for all identified contaminants
BA process meeting ASTM E1527-21 standards to qualify for innocent landowner protection under CERCLA✓ Correct
CDSPS inspection and certification
DDNR approval of the ESA report

Explanation

The EPA's All Appropriate Inquiries rule (implementing CERCLA) requires Phase I ESAs to meet ASTM E1527-21 standards. Completing a conforming Phase I ESA helps property buyers establish an innocent landowner defense under CERCLA.

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