The U.S. Department of the Interior, through the Bureau of Indian Affairs, is soliciting proposals for an Environmental Site Assessment (ESA) at Casa Blanca, specifically aimed at evaluating the environmental conditions of the Casa Blanca Community School's old facility prior to its transfer to the Gila River Indian Tribe. The primary objective is to conduct a Phase I ESA to identify any hazardous materials in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), and to provide recommendations for remediation actions. This procurement not only addresses environmental safety but also supports economic opportunities for Indian Small Business Economic Enterprises (ISBEE), aligning with federal initiatives to promote indigenous enterprises. Proposals must be submitted electronically by September 10, 2024, with the contract performance period running from September 24, 2024, to April 15, 2025. For further inquiries, interested parties can contact Michelle Nahlee-Marshalek at michelle.nahlee@bie.edu.