Identified in Environmental Site Assessment (ESA) Reports
The date of the last environmental study is typically found on the cover page or within the executive summary of a Phase I or Phase II Environmental Site Assessment report. These documents are prepared by licensed environmental consultants.

• The report date reflects when the study was conducted and finalized
  
• Includes details of site inspections, historical research, and laboratory testing
  
• Often required for property transactions, permitting, or financing
  

Available Through Property Records and Development Files
Local planning departments, environmental agencies, or real estate attorneys may retain copies of environmental reports submitted during development or permitting. These records help verify compliance with regulations.

• Reports may be part of public land use or environmental permitting files
  
• Also stored in building department archives or state environmental databases
  
• Title companies may include them in due diligence documentation
  

Requested from Owners, Developers, or Consultants
If no public record exists, the current or previous property owner, project developer, or environmental consultant may have a copy of the last study. They can confirm the date and provide supporting documentation.

• Developers often commission studies during site acquisition or pre-construction
  
• Environmental firms maintain records and may reissue certified copies
  
• Required during financing, insurance underwriting, or environmental claims