NOAA intends to award a sole source purchase order to YSI Inc. for spare parts for WaterLOG/Design Analysis water level sensors, as YSI is the sole manufacturer and distributor of these specialized components. The spare parts are required to support maintenance at environmental monitoring stations operated by the Center for Operational Oceanographic Products and Services (CO-OPS) across the Atlantic, Gulf of America, Pacific, Great Lakes, Caribbean, and coastal Alaska. Performance locations include monitoring stations within the CO-OPS network, such as the Lower Mississippi River, Delaware River, and Jacksonville ports. No budget amount is specified in the description. Interested firms may submit substantiating documentation to the point of contact within 15 days after publication of this notice to demonstrate their ability to meet the requirement.