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

Canonical: https://abierto.us/opportunities/nsf260002

- Solicitation number: NSF260002
- Notice type: Justification
- Status: Awarded to Thornton Tomasetti, Inc.
- Department: National Science Foundation
- Contracting office: Office of Polar Programs (490609)
- NAICS: 541330 Engineering Services
- Product or service code: F108 Hazardous Substance Removal, Cleanup, and Disposal Services and Operational Support
- Place of performance: Sunspot, New Mexico
- County: Otero County (FIPS 35035). https://abierto.us/counties/otero-county-nm-35035
- First posted: April 30, 2026
- Last posted: April 30, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/570137d5bba64869b2cc4dd13d0280fa/view

## Description

See Redated J&A.

## Award on USAspending

- Recipient: Thornton Tomasetti, Inc. (UEI LGWMGNMDN987)
- Contract: 49100426D0001
- Obligated: $0.00
- Competition: Not Competed, 1 offers received
- Link: award number 49100426D0001 equals the contract number; same sub-agency 4900 (high confidence)
- Record: https://www.usaspending.gov/award/CONT_IDV_49100426D0001_4900/


## Publications

- April 30, 2026: Justification. Notice 570137d5bba64869b2cc4dd13d0280fa. https://sam.gov/workspace/contract/opp/570137d5bba64869b2cc4dd13d0280fa/view

## Points of contact

- kevin giardini, kgiardin@nsf.gov, (703) 292-4589

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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/nsf260002.