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Comment Period

Low-Activity Waste Pretreatment System, OUG 1 permit modification

Hanford Sitewide Permit

Sept. 28, 2020 - Nov. 12, 2020, 11:59 p.m.

We've issued a State Environmental Policy Act (SEPA) Determination of Significance and Notice of Adoption to support the Low Activity Waste Pretreatment System (LAWPS).

The proponent is the U.S. Department of Energy (Energy) – Office of River Protection. Ecology is reopening the LAWPS public comment period for an additional 45-days, so members of the public can review the draft permit with the supporting SEPA documentation. 

In the original public comment period, we proposed a modification to Part III of the Hanford Sitewide Permit. The proposed changes affect the dangerous waste portion for the treatment, storage, and disposal of dangerous waste. A new operating unit group will be added to this portion of the permit. The permittees are Energy and Washington River Protection Solutions.


The reopening of the LAWPS public comment period includes all of the same information as previously provided during the public comment period that ran from June 22, 2020, to Aug. 7, 2020.

This proposed draft permit modification would add the Low-Activity Waste Pretreatment System Operating Group Unit Group 1 (LAWPS OUG 1) to the Sitewide Permit. The proposed modification provides design and construction details for Phase One of the LAWPS Operating Unit Group (OUG) and the associated SEPA documentation. 

Review the Determination of Significance and Notice of Adoption online at the Department of Ecology SEPA register.

The LAWPS OUG 1 will be operated in phases, with LAWPS Phase One as a Tank Side Cesium Removal (TSCR) unit that will operate for about five years. The first phase of the LAWPS OUG 1 will include the dangerous waste management units: TSCR, Ion Exchange Column (IXC) Storage Pad, and the IXC Staging Area.

Proposed changes

This proposed draft permit modification will add LAWPS OUG 1 to Part III of the Sitewide Permit. The modification includes design and construction details to support the LAWPS OUG 1, Phase One. The modification includes:

  • Unit Specific draft permit conditions
  • Draft Interim Compliance Schedule
  • Addendum A, Part A Form
  • Addendum B, Waste Analysis Plan
  • Addendum C, Process Information
  • Addendum E, Security Requirements
  • Addendum F, Preparedness and Prevention
  • Addendum G, Personnel Training
  • Addendum H, Closure Plan
  • Addendum I, Inspection Plan
  • Addendum J, Contingency Plan
  • Appendices that include the necessary supporting design media (specifications, calculations, reports, and engineering drawings)
  • SEPA Determination of Significance and Notice of Adoption

Review and comment

The modification proposal and supporting documents are on our Hanford public comment periods page.

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Comment online

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Comment by mail

Daina McFadden
3100 Port of Benton Blvd
Richland, WA 99354
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Daina McFadden
Permit Communication Specialist

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