This combined synopsis/solicitation for commercial items prepared in accordance with the format at RFO 12.202, as supplemented with additional information included in this notice. This announcement constitutes the only solicitation; quotes are being requested and a written solicitation will not be issued. The solicitation number W913E526QA007 is being issued as a request for quotation (RFQ). The associated North American Industry Classification System (NAICS) code is 541380 – Testing Laboratories & Services, which has a small business standard size of 19M. This requirement is Full & Open Competition. The Biogeochemical Sciences Branch (BSB) at the Cold Regions Research and Engineering Laboratory (CRREL) Alaska Research Office (AKRO) has a requirement to analyze up to forty (40) water samples to generate a dataset on iron (Fe) stable isotopes. Scope : The Contractor shall analyze up to forty (40) water samples from thawing permafrost areas to generate datasets on iron stable isotopes. CRREL will collect the water samples during a field campaign in summer (June-September) of 2026 and send to the contractor for analysis. Performance Requirements : The following section specifies the Performance Objectives and Performance Elements for the contract. The Contractor shall conduct the following specified work: Sample Reception and Quality Assessment: CRREL will ship up to forty (40) samples to the contractor via tracked shipment. The contractor shall acknowledge receipt via email to the COR and TPOC. The contractor shall place the samples in cold storage (>/= -4 degrees C) until preparation and analysis. The Contractor shall perform initial quality assessment of samples upon receipt and report any problems immediately via email or indicate no issues observed via email to the COR and TPOC. Iron Stable Isotope Analysis: For these samples, perform iron stable isotope analysis (56Fe and 57Fe isotopic fractionation) via plasma sourced multi-collector mass spectrometry (MC-ICP-MS), including necessary sample preparation. Nalgene bottles filled with 500 mLs of each of the water samples will be shipped to the contractor in a cool environment by CRREL using ice packs. Samples will be comprised of unfiltered natural stream waters. Fe concentrations will likely contain a minimum Fe of >10 micrograms/liter. Data Processing and Quality Control: Perform raw data processing for analysis platform. Implement rigorous quality control (QC) procedures to identify and remove low-quality data and re-analyze, if applicable. Normalize data to account for technical variations, if applicable. Data Analysis and Reporting: Deliver raw and processed data and provide instrument parameters the analysis. Provide methods for sample preparation and analysis to be included in final reporting by CRREL. Evaluation factors. The Government will award a contract resulting from this solicitation tothe responsible Offeror whose offer conforming to the solicitation will be most advantageous t…