The U.S. Army Corps of Engineers, Philadelphia District, intends to award a sole source modification to an existing Firm Fixed Price Task Order (W912BU21F0036) to RAMBOLL AMERICAS ENGINEERING SOLUTIONS INC for additional engineering design efforts related to FUSRAP remediation. This procurement falls under the NAICS code 541330 for Engineering Services, which is crucial for ensuring compliance with environmental remediation standards in the specified area. The modification is being pursued under the authority of 10 U.S.C. § 2304(c)(1), indicating that only one responsible source can fulfill the agency's requirements. Interested parties may submit responses to Grace McMullen at grace.c.mcmullen@usace.army.mil by 16:00 EDT on June 27, 2025, for consideration.