This is a market research notice from the U.S. Environmental Protection Agency (EPA) to gauge interest and capability for future Architect-Engineer Indefinite Delivery/Indefinite Quantity contracts. The work involves a wide range of architectural and engineering services, including design, studies, and sustainability projects, primarily for construction and alteration across EPA regions 5 through 10, covering much of the central and western United States and Pacific territories. Each potential contract has a five-year base period with five one-year options, a minimum order value of $20,000, and a ceiling of $80,000,000, with individual task orders typically ranging from $25,000 to $250,000. Interested and qualified firms must submit a detailed capability statement demonstrating relevant experience. The EPA may set the eventual solicitation aside for small businesses, which would then need to perform at least 50 percent of the direct labor costs with their own personnel.