ASTM standard

March 22, 2023

Environmental Due Diligence SCS Engineers

SCS Engineers periodically prepare SCS Technical Bulletins – short, clear summaries of rules, plans, and standards. In 2021, ASTM International published an updated consensus guidance document for evaluating environmental conditions at properties involved in commercial real estate transactions.

This SCS Technical Bulletin for the revised E1527-21, Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process addresses definitions and terminology, clarifies industry practice for the historical records review of the subject and adjoining properties, and provides for updates and additions to appendices, report outlines, and other collateral.

Our updated edition now includes the revised guidance speaks to the business risk associated with emerging contaminants, such as Per- and polyfluoroalkyl substances (PFAS). 

Read, share, download the A New Standard Practice for Phase I Environmental Site Assessments Tech Bulletin here.


For more information about Environmental Due Diligence, please visit our website.






Posted by Diane Samuels at 3:37 pm

February 17, 2022

astm due diligence


SCS’s Mike Miller explains the impact of the new ASTM E1527-21 Due Diligence Standard. Mike covers the history, CERCLA, defenses, and the changes impacting due diligence in the new Standard in this video. Watch it here. Use chapters in the timeline to jump from topic to topic at these start points:

  • 00:00 Intro
  • 03:13 Legal Background
  • 04:36 Responsible Parties
  • 05:07 CERCLA Defenses
  • 12:00 Phase I ESA
  • 14:08 Major Components of Phase I and changes based on E1527-21
  • 20:44 Simplified REC Logic
  • 23:38 PFAS is Not included, yet.
  • 23:55 Conclusion and Technical Resources


Learn more about Environmental Due Diligence and All Appropriate Inquiries, and meet Mike Miller, SCS’s National Expert. Today’s commercial real estate transactions must take environmental issues into consideration. Complex laws can impose significant environmental liabilities on purchasers, sellers, and lenders, whether or not they caused the problem, and whether or not they still own the property. Environmental Engineers can help protect you and your investment.





Posted by Diane Samuels at 11:55 am