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This is a Phase I Environmental Site Assessment (ESA) report cover page for the GRC-Armstrong Test Facility (ATF) North Plot located at Taylor Road and Ransom Road in Sandusky, Erie County, Ohio. The assessment was prepared by Terracon Consultants, Inc. in Cleveland, Ohio, with a project number of N6247241, dated March 19, 2025. The document was prepared for Firelake - Arrowhead NASA Services, located at 21000 Brookpark Road in Cleveland, Ohio. Terracon Nationwide is identified as the environmental consulting firm responsible for conducting the Phase I ESA, which typically involves reviewing the property's historical use, conducting a site inspection, and identifying potential environmental concerns or contamination risks to inform decision-making regarding the property's current or future use.