# Apatite fission-track (AFT) and U-Pb analyses

Canonical: https://abierto.us/opportunities/140g0326q0167

- Solicitation number: 140G0326Q0167
- Notice type: Special notice (first published as sources sought)
- Status: Awarded to Geosep Services, LLC
- Department: Department of the Interior
- Agency: US Geological Survey
- Contracting office: Office of Acquisiton Grants (140G03)
- NAICS: 541380 Testing Laboratories and Services
- Product or service code: B517 Geological Studies
- First posted: July 14, 2026
- Last posted: July 22, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/ba57347c66914e66a4ea744a20ad8f73/view

## Description

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 GeoSep Services for apatite fission track and U-Pb analysis. 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.

GeoSep is, to the USGS' knowledge, the only source who can meet all the required technical requirement, i.e. 252Cf irradiation. 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 541380, Testing Laboratory. Responses or inquiries shall only be accepted through electronic mail addressed to yangzhi_deng@ios.doi.gov and must be uploaded and received in their entirety no later than August 3, 2026 at 0800 PST. Responses submitted by hardcopy or any web portal shall not be accepted or considered.

## Award on USAspending

- Recipient: Geosep Services, LLC (UEI MJPTEKJ6QJF4)
- Contract: 140G0326P0236, purchase order
- Obligated: $24,820.00
- Competition: Not Competed Under SAP, 1 offers received
- Link: solicitation number 140G0326Q0167 equals the FPDS solicitation identifier; same awarding office 140G03 (high confidence)
- Record: https://www.usaspending.gov/award/CONT_AWD_140G0326P0236_1434_-NONE-_-NONE-/


## Publications

- July 14, 2026: Sources sought, due July 17, 2026 at 6:00 PM EDT. Notice b8fc22f54a7b4a2fab579a0267e4b3e1. https://sam.gov/workspace/contract/opp/b8fc22f54a7b4a2fab579a0267e4b3e1/view
- July 22, 2026: Special notice, due August 3, 2026 at 11:00 AM EDT. Notice ba57347c66914e66a4ea744a20ad8f73. https://sam.gov/workspace/contract/opp/ba57347c66914e66a4ea744a20ad8f73/view

## Points of contact

- Deng, Yangzhi, yangzhideng@usgs.gov, 916-278-9326

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Source: SAM.gov Contract Opportunities bulk extract and USAspending.gov award data. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/140g0326q0167.