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

Canonical: https://abierto.us/opportunities/140g0326q0047

- Solicitation number: 140G0326Q0047
- 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
- County: Latah County (FIPS 16057). https://abierto.us/counties/latah-county-id-16057
- City: Moscow. https://abierto.us/cities/moscow-id-1654550
- First posted: February 23, 2026
- Last posted: March 10, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/b6fc59a94b224e6181cf7932fda07100/view

## Description

Apatite fission-track (AFT) and U-Pb analyses 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 (AFT) and U-Pb analyses from geological samples. Award will be made in accordance with Federal Acquisition Regulation (FAR) 13.106-1(b) and the procedures at FAR Part 12 entitled, Acquisition of Commercial Items and FAR Part 13 entitled, Simplified Acquisition Procedures.

Geosep Services is, to the USGS' knowledge, the only source who can provide the offer in-situ Uranium and Lead isotope measurements by LA-ICP-MS for U-Pb date determination and 252Cf irradiation. The purpose of this notice is to satisfy the requirements of FAR Subpart 5.101(a)(1) and FAR 5.2. 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 yangzhideng@usgs.gov and must be uploaded and received in their entirety no later than March 13, 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 6.305.

## Award on USAspending

- Recipient: Geosep Services, LLC (UEI MJPTEKJ6QJF4)
- Contract: 140G0326P0072, purchase order
- Obligated: $32,850.00
- Competition: Not Competed Under SAP, 1 offers received
- Link: solicitation number 140G0326Q0047 equals the FPDS solicitation identifier; same awarding office 140G03 (high confidence)
- Record: https://www.usaspending.gov/award/CONT_AWD_140G0326P0072_1434_-NONE-_-NONE-/


## Publications

- February 23, 2026: Sources sought, due February 26, 2026 at 6:00 PM EST. Notice b14094dcc1594d41a6e41ba7298f8772. https://sam.gov/workspace/contract/opp/b14094dcc1594d41a6e41ba7298f8772/view
- March 10, 2026: Special notice, due March 13, 2026 at 6:00 PM EDT. Notice b6fc59a94b224e6181cf7932fda07100. https://sam.gov/workspace/contract/opp/b6fc59a94b224e6181cf7932fda07100/view

## Points of contact

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

---
Source: SAM.gov Contract Opportunities bulk extract and USAspending.gov award data. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/140g0326q0047.