---
title: "What Is AAI (All Appropriate Inquiries)? | Calibre Glossary"
description: "All appropriate inquiries is the process of evaluating a property's environmental conditions and assessing potential liability for contamination, under the."
url: https://calibre.multisites.ai/glossary/all-appropriate-inquiries
publisher: Calibre Commercial Inspections
phone: "+1-208-305-6245"
email: Schedule@CalibreCBI.com
---

Environmental

# All Appropriate Inquiries (AAI)

All appropriate inquiries is the process of evaluating a property's environmental conditions and assessing potential liability for contamination, under the EPA rule at 40 CFR Part 312.

## Why it matters

Completing AAI is one threshold requirement for landowner liability protections under CERCLA, such as the bona fide prospective purchaser defense. EPA recognizes ASTM E1527-21 as satisfying the rule. Key AAI components must be done or updated within 180 days before acquisition.

Source: [epa.gov](https://www.epa.gov/brownfields/brownfields-all-appropriate-inquiries)

## Where we discuss it

-   [How Long Is a Phase I ESA Valid? 180 Days and 1 Year](https://calibre.multisites.ai/cre-inspector-insights/how-long-is-a-phase-i-esa-valid)
-   [PFAS and Phase I ESAs: What CRE Buyers Should Ask](https://calibre.multisites.ai/cre-inspector-insights/pfas-and-phase-i-esas-what-cre-buyers-should-ask)
-   [Phase I ESAs in the Inland Northwest: Which State Records Get Searched](https://calibre.multisites.ai/cre-inspector-insights/phase-1-esa-state-records-inland-northwest)
-   [The Stack Is Still Standing — A Montana Landmark](https://calibre.multisites.ai/cre-inspector-insights/the-stack-anaconda-mt)

## Ready for your next inspection?

Tell us about the property and your timeline. We will scope the right report and send a proposal.

[Request a proposal](https://calibre.multisites.ai/request-proposal) [(208) 305-6245](tel:+12083056245)