# 2026-03879: EPA Greenlights 100 Hazardous Waste Piles in Oklahoma – No Leaks Promised!

2026-03879, No-Migration Variance From Land Disposal Restrictions for Clean Harbors Lone Mountain, Oklahoma, is a Federal Register rule from Environmental Protection Agency published 2026-02-26, effective 2026-03-30 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2026-03879
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-03879
- Title: No-Migration Variance From Land Disposal Restrictions for Clean Harbors Lone Mountain, Oklahoma
- Type: Rule
- Agencies: Environmental Protection Agency
- Citation: 91 FR 9470
- Published: 2026-02-26
- Effective: 2026-03-30
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-11

## In one line

EPA Greenlights 100 Hazardous Waste Piles in Oklahoma – No Leaks Promised!

## Summary

The EPA just gave Clean Harbors' Lone Mountain facility in Oklahoma the green light to temporarily store certain treated hazardous wastes in up to 100 special piles on-site while they check if the waste meets safety rules. This means Clean Harbors can hold onto these wastes safely before final disposal, starting March 30, 2026, with no extra costs announced. It’s a win for safe, smart waste management at this facility!

## Abstract

The Environmental Protection Agency (EPA) is approving with conditions, no-migration variances for nine categories/groups of wastes, containing up to a combined 100 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' Lone Mountain (Clean Harbors) commercial treatment, storage and disposal facility (TSDF) in Waynoka, Oklahoma. These variances will allow Clean Harbors to temporarily store treated hazardous wastes that are awaiting LDR compliance verification in put piles within its 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 put piles 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.

## Effects PRIA read

- Facility Allowed 100 On‑Site Put Piles: benefit, medium. EPA approved a no‑migration variance letting Clean Harbors' Lone Mountain facility in Waynoka, Oklahoma temporarily store treated hazardous wastes in up to a combined 100 "put piles" at any one time in Subtitle C Landfill Cell 15. This approval is effective March 30, 2026.
- Six‑Month (180‑Day) Storage Limit Per Put Pile: cost, low. Each put pile may be staged for up to six (6) months (180 days) from the time the pile is first staged until final disposal in Landfill Cell 15. If staging beyond 180 days is necessary, the Oklahoma Department of Environmental Quality (ODEQ) may issue an extension if warranted.
- Detailed Liners, Cover, and Monitoring Requirements: cost, medium. Put piles must use a single‑piece polyethylene liner at least 20‑mil thick with at least 12 inches of liner visible around the pile, be covered with Posi‑Shell (minimum 3/8‑inch thickness) or temporary 20‑mil polyethylene sheeting during adverse weather, and be subject to daily inspections. Deficie…
- Cap, Expansion Process, and Reporting Conditions: cost, low. Clean Harbors must request EPA Region 6 approval before creating more than 100 put piles. Expansion of the variance to a future Cell 16 requires an addendum and meeting five conditions (compliance with the NMV, same engineered controls, 6‑month duration, same waste categories, and expanded monitori…

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## Sources
- [2026-03879 on federalregister.gov](https://www.federalregister.gov/documents/2026/02/26/2026-03879/no-migration-variance-from-land-disposal-restrictions-for-clean-harbors-lone-mountain-oklahoma)
- [2026-03879 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-02-26/pdf/2026-03879.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2026-03879 (as of 2026-06-11).