# SAM #140GG027Q0001

USGS stable isotope analysis of carbonate microfossils

**Buyer:** USGS CONTRACTING ACTIVITY
**Posted:** October 19, 2026
**Respond By:** October 26, 2026
**Identifier:** 140GG027Q0001
**NAICS:** 541380

The U.S. Geological Survey is seeking laboratory analysis of carbonate microfossils for stable carbon and oxygen isotope measurements.
- **Government buyer:** U.S. Geological Survey (USGS), Department of the Interior. The materials identify both USGS Programs–Reston and the Florence Bascom Geoscience Center.
- **Requested service:** Stable isotope analysis under solicitation 140GG027Q0001, including a schedule entry for CLIN 00010 and work described in the Statement of Work.
- **Scope and quantity:** Up to 2,000 measurements of carbonate microfossils, primarily benthic foraminifera and ostracodes; the schedule entry itself does not state a quantity. Additional measurements may be requested in later years.
- **Technical requirements:** Prepare and analyze small specimens (including 5–9g specimens); document preparation and analytical methods; use mass-matched Carrara Marble standards; and meet stated analytical precision thresholds. Deliver corrected carbon and oxygen isotope values and supporting analytical data. Reanalyze work that does not meet the quality standard at no additional cost.
- **Performance:** Complete sample preparation and analysis within six months of sample receipt, subject to mutual agreement for unforeseen circumstances. The described main scope is targeted for completion within FY27; additional work may occur in later years. The initial release also describes a one-year period after receipt of order with no option periods.
- **OEMs and vendors:** No commercial OEMs, vendors, or named laboratory providers are identified.

### Description

The U.S. Geological Survey Florence Bascom Geoscience Center, Reston Virgina  requires the Stable isotope analysis of carbonate microfossils.  The period of performance is one year ARO.<br/><br/>There are no option periods.<br/><br/>Competitive Request for Quotations (RFQ) 140GG027Q0001 is a is full and open under NAICS code 541380 Testing Laboratories   The size standard is $19 million.<br/>Question cutoff: 2 days prior to the closing of the solicitation <br/>The anticipated award date of the contract is 7 days after the solicitation closes.  <br/><br/>SAM REQUIREMENT- Offeror must be registered in the SAM - SYSTEM FOR AWARD MANAGEMENT database before an award can be made to them.<br/><br/>All responsible sources may submit a quotation which shall be considered by the agency.  Quotations shall be submitted to Mindie Dixon at mindie_dixon@ios.doi.gov <br/><br/>

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