What is a Phase I Environmental Site Assessment?

A Phase I Environmental Site Assessment (ESA) identifies potential or existing environmental contamination liabilities for a real estate asset. Phase I ESAs are conducted according to the American Society for Testing and Materials (ASTM) E1527-13 Standard. A Phase I ESA typically consists of the following elements:


  • Historical records review
  • Regulatory research of the property
  • Geology and hydrogeology
  • Interviews with current or previous occupants or owners
  • Visual site inspection


Sampling activities are not conducted under the ASTM 1527-13 Standard; however, some lenders require additional testing of materials (i.e. radon, asbestos containing building materials, lead, etc.) or assessments of additional environmental conditions (wetlands, floodplains, threatened and endangered species, etc.). AGM can perform these non-scope services as part of the Phase I ESA Report package. 


AGM staff have undergone rigorous training directly from ASTM under the ASTM E1527-13 Standard for the Phase I Environmental Site Assessment Process. Our staff meet the EPA’s qualification standard as Environmental Professionals under the All Appropriate Inquiries Rule.