American Society for Testing and Materials (ASTM) is an International standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services.


ASTM E1527-00 Millennium Standard
The ASTM 1527 Committee issued the 00 (Millennium Standard) that is still utilized today by some lenders and owners of commercial real estate. The release of the 2000 standard introduced the opinion section of a Phase I as well as the required qualifications of people performing phase one studies. This standard can be utilized by entities that do not need to rely on the protections offered by the 1527-05 All Appropriate Inquiry (AAI) rule.


ASTM E1527-05 All Appropriate Inquiry (AAI) rule
On November 1, 2006 the  Environmental Protection Agency (EPA) signed into law the All Appropriate Inquiry(AAI) rule designed to hold potential purchasers of real estate to a higher threshold of due diligence. The AAI compliant report is required by regulators when petitioning for assistance under the current available CERCLIS or Brownfield’s programs.


The ASTM E1527-05 standard has a direct correlation to the AAI rule in which the Federal Environmental Protection Agency (EPA) determined meets the definition of AAI.


In October of 2015 the ASTM E1527-05 standard will no  longer be recognized as meeting the AAI definition.


ASTM E1527-13 Standard
On November 6, 2013 ASTM released the 1527-13 standard which was designed to be a clarification of the E1527-05 AAI rule.  The revised standard has three (3) significant areas for consultants to be aware of. The Federal EPA determined on December 30, 2013 that this standard meets the definition of the AAI rule.


The EPA now recognizes both ASTM E1527-05 &13 as compliant with the AAI rule. 


Merritt Environmental Consulting Corp. is proficient in the nuances of the AAI style of report


Click here for more information on the new ASTM 1527-13 standard.


Click here to download the EDR presentation of the new ASTM 1527-13 standard.