The Department of Commerce, specifically the National Oceanic and Atmospheric Administration (NOAA), is seeking sources for an Indefinite Delivery Indefinite Quantity (IDIQ) contract for isotope analysis of atmospheric trace gases in Boulder, Colorado. The procurement aims to identify vendors capable of providing comprehensive analysis of isotopic ratios and radiocarbon from atmospheric air samples, including stable isotopes of Carbon Dioxide (CO2) and Methane (CH4), with a focus on measurement precision and timely data delivery. This analysis is crucial for understanding greenhouse gas concentrations and isotopic ratios, which play a significant role in climate monitoring and research. Interested parties must respond by December 12, 2025, at 10:00 AM Mountain Standard Time, and can contact Anthony Eubanks at anthony.eubanks@noaa.gov or Remo Dela Cruz at remo.dela-cruz@noaa.gov for further information.