The U.S. Geological Survey (USGS) is seeking quotations for neutron irradiation services necessary for the 40Ar/39Ar geochronology process, as part of a Request for Quotation (RFQ) identified as 140G0225Q0031. The procurement aims to secure the irradiation of mineral and rock samples at a contractor's nuclear reactor facility due to the temporary non-operation of the USGS's Denver reactor. This service is critical for geological assessments and hazard evaluations, ensuring precise timing and conditions of irradiation to support resource mapping and assessment. Interested contractors should contact Yvette Sornberger at ysornberger@usgs.gov or by phone at 303-236-9332, with the contract performance options spanning from April 21, 2025, to April 20, 2030.