The Department of Defense, specifically the U.S. Army Corps of Engineers (USACE) Engineering Research and Development Center-Construction Engineering Research Laboratory (ERDC-CERL), is seeking maintenance services for the Evoqua Deionized Water System. The procurement involves routine inspection and maintenance, including tank and filter changes every four months, over a one-year period with two additional one-year option periods. This system is critical for providing purified water necessary for various research programs at CERL, and Evoqua Water Technologies LLC is the sole source provider due to their status as the original equipment manufacturer. Interested parties may submit capability statements to CERL-CT-QUOTES@usace.army.mil by the specified deadline, although this notice does not guarantee a contract award or a competitive procurement process.