This is a Sources Sought notice for market research to determine interest and capabilities for a potential future solicitation. The requirement is for environmental assessment services specializing in sediment characterization in coastal or marine environments, including sampling, analysis, data reporting, and data submission to a specific Washington State database. Interested contractors must demonstrate relevant experience and capability against five specific technical criteria. The associated NAICS code is 541620 with a $19 million size standard. All contractors must be registered in the System for Award Management (SAM).