This is a Sources Sought notice for market research to gauge small business capability for a Design-Bid-Build construction project for a Phase III Groundwater Treatment Plant in Wantagh, New York. The project involves the complete construction and commissioning of a new plant to treat contaminated groundwater, with an estimated construction cost between $25,000,000 and $100,000,000. The anticipated contract award is September 2026. The notice strongly encourages responses from eligible small business categories and requires detailed company information and examples of relevant past projects. Responses are required by a specified deadline and must be submitted electronically.