The U.S. Fish and Wildlife Service Region 5 awarded a purchase order to Mabbett & Associates, Inc., a Service-Disabled Veteran-Owned Small Business, on September 25, 2026, for $26,750 to investigate the potential presence of polyfluoroalkyl substances (PFAS) at Great Swamp National Wildlife Refuge. This is a total small business set-aside, firm fixed-price procurement. Performance occurs in Stoneham, Massachusetts, with an ultimate completion date of September 24, 2027. Work includes development of a Quality Assurance Project Plan, site-specific field reconnaissance to identify porewater sampling locations, execution of PFAS sampling using contamination-prevention protocols, submission of four samples to a certified laboratory for EPA-approved analysis, and delivery of a field report and complete laboratory data package with validated analytical results.