B--Notice of Intent

The U.S. Geological Survey (USGS) intends to award a sole‑source contract to Iowa State University for stable isotope ratio analysis (carbon, oxygen, nitrogen) of powdered calcium carbonate samples supporting sclerochronology research at the St. Petersburg Coastal and Marine Science Center. The work requires micro‑sample handling, chain‑of‑custody documentation, calibration standards, and data reduction methods compatible with multiyear datasets. The contract is for one year with four optional extensions, performed at the USGS facility in Ames, IA. Although the notice is not a competitive solicitation, interested parties may submit capability statements for government consideration. • Sole‑source award to Iowa State University • Service: stable isotope ratio analysis (IRMS) for geological samples • NAICS 541380 – Testing Laboratories and Services • Period of performance: 1 year + up to four option years • Location: Ames, Iowa • Anticipated award date: 9 July 2026 • No competitive bid; capability statements accepted by unspecified deadline.