Skip to content


Phase 1 Environmental Site Assessment – ASTM E1527-13

Phase I Environmental Site Assessments (ESA)

A Phase I ESA is used to identify actual and potential environmental concerns and contamination at a Site which may impact the property value or affect claim to an “innocent land owner” exemption following acquisition. Environmental Site Assessments are performed in accordance with the most recent American Society for Testing and Materials (ASTM) Standard E 1527-13, Standard Practice for Environmental Site Assessment. The ASTM E1527-13 Standard is the most comprehesive and widely accepted standard for conducting Environmental Site Assessments. Financial institutions frequently require that a Phase I ESA be conducted for due dilligence. Overlooking environmental concerns can cost you substantial future environmental expenditures, even if you did not create or contribute to the contamination.

A review of historical and current environmental records and documentation pertaining to the Site including:

    • A review of Sanborn Fire Insurance Maps

    • Aerial photos and USGS 7.5′ topographical maps

  • Regulatory records review, including Federal, State, Local and Tribal records concerning the property and the neighboring properties
  • Performance of an on-site visit to view present conditions and evaluate any likely environmentally hazardous site history
  • Evaluation of risks of neighboring properties upon the subject property
  • Interview of persons knowledgeable regarding the property history (past owners, present owner, key site manager, present tenants, neighbors)
  • Environmental Impact Statements

A professional report, including conclusions and recommendations concerning the property, is provided based on our professional judgment and findings.