Sources Sought The U.S. Geological Survey (USGS) is conducting market research to determine the availability of qualified businesses capable of isotope analyses as described in the attached Statement of Work. This sources sought announcement is not a request for quote or proposal and the Government is not committed to award of a purchase order or contract pursuant to this announcement. The information resulting from this market research is simply for planning purposes to assist the Government in determining its acquisition strategy. The Government will not pay for any costs incurred in the preparation of information for responding to this notice. All responsible sources may submit a capabilities statement detailing the ability of their service to meet the statement of work included with this announcement. Responses to this announcement shall only be accepted through electronic mail addressed to amberry@ios.doi.gov and must be uploaded and received in their entirety no later than June 5th, 2026, at 8AM Pacific time. Example statement of work attached.