J&A for Structural Engineering and Liquid Mercury Removal and Remediation Services for the Dunn Solar Telescope (DST)

SOL #: NSF260002JustificationSole Source

Overview

Buyer

National Science Foundation
National Science Foundation
OFFICE OF POLAR PROGRAMS
ALEXANDRIA, VA, 22314, United States

Place of Performance

Sunspot, NM

NAICS

Engineering Services (541330)

PSC

Hazardous Substance Removal, Cleanup, And Disposal Services And Operational Support (F108)

Set Aside

No set aside specified

Timeline

1
Posted
Apr 30, 2026

Qualification Details

Fit reasons
  • NAICS alignment with historical contract wins in similar service areas.
  • Scope strongly matches core technical capabilities and delivery model.
Risks
  • Past performance thresholds may require one additional teaming partner.
  • Potential clarification needed on staffing minimums before bid/no-bid.
Next steps

Validate eligibility requirements, assign capture owner, and schedule partner outreach to confirm teaming strategy before submission planning.

Quick Summary

The National Science Foundation (NSF), specifically the OFFICE OF POLAR PROGRAMS, has published a Justification and Approval (J&A) for Other Than Full and Open Competition for Structural Engineering and Liquid Mercury Removal and Remediation Services for the Richard B. Dunn Solar Telescope (DST) in Sunspot, NM. This J&A justifies a sole-source award due to an immediate, emergency situation involving a large liquid mercury leak and potential structural instability.

Purpose & Justification

This document outlines the critical need for specialized services to address an emergency at the DST, which contains approximately 160 gallons (18,000 lbs) of liquid mercury. A structural crack was discovered in the mercury bearing weld, posing a significant risk of catastrophic failure, environmental damage, and harm to personnel. The J&A cites "unusual and compelling urgency" (FAR 6.302-2) to bypass full competition, as any delay would exacerbate these risks.

Scope of Work

The required services include:

  • Forensic engineering assessment of structural integrity.
  • Rapid hazardous materials remediation for liquid mercury.
  • Stabilization of the telescope structure.
  • Complete draining and removal of liquid mercury from the telescope's bearings and seals.
  • Removal of mercury-contaminated materials.
  • Selective interior demolition of mercury-containing components.
  • Environmental compliance support and site remediation.

Contract Details

  • Type: Sole-Source Justification (for a 12-month contract)
  • Product Service Code: F108 - Hazardous Substance Removal, Cleanup, And Disposal Services And Operational Support
  • Estimated Value: Redacted
  • Awardee (Proposed): Thornton Tomasetti, selected for their specialized expertise, immediate mobilization capability, and prior experience with similar large-scale telescope stabilization and hazardous material response.

Set-Aside

Not applicable, as this is a sole-source justification for an emergency requirement.

Award Process

A synopsis will not be issued prior to the award. A post-award notice and justification will be published after the contract is awarded.

Additional Notes

The NSF has coordinated with the U.S. Forest Service regarding the DST's location on National Forest System lands.

People

Points of Contact

kevin giardiniPRIMARY

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Justification
Posted: Apr 30, 2026
J&A for Structural Engineering and Liquid Mercury Removal and Remediation Services for the Dunn Solar Telescope (DST) | GovScope