Data / Federal rules / 2025-24134

No-Migration Variance From Land Disposal Restrictions for Clean Harbors Grassy Mountain, Utah

The Environmental Protection Agency published this proposed rule in the Federal Register on December 31, 2025. Comments closed on January 30, 2026.

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What the agency says

The U.S. Environmental Protection Agency (EPA) is proposing to grant, with conditions, no-migration variances for four categories/ groups of wastes, containing up to 250 temporary disposal units ("put piles") at any one time, from the Resource Conservation and Recovery Act (RCRA) Land Disposal Restrictions (LDR) standards at Clean Harbors' Grassy Mountain (Clean Harbors) commercial treatment, storage and disposal facility (TSDF) in Tooele County, UT. These variances will allow Clean Harbors to temporarily store treated hazardous wastes that are awaiting LDR compliance verification in put piles within their Subtitle C (hazardous waste) landfill. The petitioner demonstrated, to a reasonable degree of certainty, that there will be no migration of hazardous constituents from the disposal units for as long as the wastes remain hazardous. Additionally, once LDR compliance is verified, the put piles will be disposed within the onsite RCRA hazardous waste Landfill area and will be subject to the conditions set out in the Compliance Monitoring Plan section of this document.

Key facts

Document number: 2025-24134
Type: Proposed rule
Action: Notice of proposal to grant
Agency: Environmental Protection Agency
Published: December 31, 2025
Comments due: January 30, 2026
Dates: Comments must be received on or before January 30, 2026.
Docket: EPA-R08-RCRA-2025-0420; FRL-12863-01-R8
Code of Federal Regulations: 40 CFR 268
Pages: 6

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Published in December 2025

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.