SILICON AUDIO BOREHOLE SENSORS Notice of Intent This is a notice of intent to solicit from a single source. The U.S. Geological Survey (USGS), intends to award a purchase order to Silicon Audio for the purchase of two 203-60 replacement borehole accelerometers. Award will be made in accordance with Revolutionary FAR Overhaul (RFO) Federal Acquisition Regulation (FAR) Part 12 entitled, Acquisition of Commercial Products and Commercial Services. Silicon Audio is, to the USGS¿ knowledge, the only source who can provide the equipment with the required technical specifications and ensure compatibility with the existing system. The purpose of this notice is to satisfy the requirements of RFO FAR Subpart 5.101(a). This notice of intent is not a request for competitive quotes. However, all responsible parties may submit a quotation by the closing date of this announcement which shall be considered by the agency. No solicitation will be issued. A determination not to compete this action based upon responses received is in the sole discretion of the Government. The NAICS code for this action is 334513, Instruments and Related Products Manufacturing for Measuring, Displaying and Controlling Industrial Process Variables. Responses or inquiries shall only be accepted through electronic mail addressed to yangzhideng@ios.doi.gov and must be uploaded and received in their entirety no later than June 29, 2026 at 1500 PST. Responses submitted by hardcopy or any web portal shall not be accepted or considered. The attached sole source justification has been redacted in accordance with FAR 6.301.