The U.S. Army Corps of Engineers (USACE) Baltimore District is seeking sources for an indefinite-delivery indefinite-quantity (IDIQ) contract for the procurement of Aluminum Sulfate and Polyaluminum Hydroxychlorosulfate. This procurement aims to fulfill essential chemical requirements for the Washington Aqueduct, which plays a critical role in water treatment and supply. Interested vendors should note that the primary contact for this opportunity is Clark Miller, who can be reached at clark.b.miller@usace.army.mil or by phone at 410-962-5679 for further inquiries. This sources sought notice is part of the preliminary steps in the contracting process, and no funding amount or specific deadlines have been provided at this stage.