A Phase I Environmental Site Assessment (ESA) is a means to conduct adequate inquiry into a property's environmental status and to identify any recognized environmental conditions (RECs) associated with the property and surrounding parcels. This involves inspecting the property and collecting historical and current information to evaluate the potential for environmental contamination. EAS personnel are well versed in the regulations and procedure to conduct a Phase I ESA following the requirements of the most up to date American Society for Testing and Materials Standard (ASTM E1527-13). The purpose is to satisfy a purchaser’s All Appropriate Inquiry (AAI), also known as Due Diligence, under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) under the innocent land owner’s defense. This includes, but is not limited to a review of regulatory agency files, historical maps and photographs, Assessor's records, a vapor intrusion assessment, and in assessing whether the current and/or past uses of the property have impacted the environment.