Phase I Environmental Site Assessment (ESA) for an approximately 60.4-hectare (149.3-acre) site in Maricopa County, Arizona (6L Ranch). Pursuant to the American Society for Testing Materials (ASTM) Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process (ASTM E 1527-00), the history and current use of the Property and surrounding parcels were determined, and a site reconnaissance was conducted.