The United States Department of Agriculture (USDA), through its Agricultural Research Service (ARS), is seeking a limited source procurement for the analysis of 1,100 lettuce samples to test for at least 100 phytohormones using a targeted metabolomics approach. This procurement aims to maintain continuity and consistency with previous analyses conducted by the same contractor, Bridging Pieces, which will facilitate cost and time savings by utilizing remaining plant tissue from prior work, thus eliminating the need for new sample collection. The contract is expected to be awarded on a Firm Fixed Price basis, with an estimated period of performance of 60 days following the award. Interested parties may submit documentation to Theodore Blume at Theodore.Blume@usda.gov within seven calendar days of this notice, as no solicitation will be issued.