top of page

Phase 1 ESAs

Phase 1 Environmental Site Assessments

Simply put, a Phase 1 Environmental Site Assessment (Phase 1 ESA) is a study of a property to identify potential or existing environmental liabilities. Although the ESA typically addresses both the underlying land as well as physical improvements to the property, the scope of work does not include actual collection of soil or groundwater samples or chemical analysis of any kind.


What's Included in a Phase 1 Environmental Site Assessment?


  • Site Walk: The outdoor and indoor areas of the property are inspected for evidence of spills of hazardous substances or petroleum products, such as soil staining and petroleum odors, leaking containers, pipes or other evidence of underground storage tanks. The surrounding properties are also visually inspected from the property boundary or intervening streets.


  • Regulatory Research: Federal, state, local and tribal environmental records are reviewed out to distances ranging from 1/8 to 1 mile, depending on the database.


  • Historical Research: Interviews of past and present owners, occupants, and neighbors are conducted. In addition, a historical review is conducted via air photos, reverse phone books, fire insurance maps, and topographic maps.


  • Records Review: Local building plans and permits, health department and fire department records, and tax and title information, including environmental liens are reviewed.


  • Report: The findings of the research, including any recommendations for further investigation, are summarized in an environmental site assessment report report along with site photographs and other relevant documentation, in accordance with a standard set forth by the American Society for Testing and Materials (ASTM) Practice E 1527-13, Phase 1 Environmental Site Assessment.


The experience of the Environmental Professional is the most important factor in insuring that your Phase 1 Environmental Site Assessment is conducted in accordance with the performance standards of ASTM E 1527-13.

AAI is headquartered in Gold River, California, and we provide all our services nationwide.


bottom of page