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May 1, 2022
Event: Public Comment Period for a Carbon Dioxide Removal Skid at the Effluent Treatment Facility
Category: Comment Period / Feedback Opportunity
Event Date: March 31 - May 29, 2022

Public Comment Period on Proposed Changes to the Hanford Dangerous Waste Permit

The U.S. Department of Energy is holding a 60-day public comment period on a proposed Class 2 permit modification to the Hanford Dangerous Waste Permit. This proposed permit modification is required to install and operate a carbon dioxide removal skid at the Effluent Treatment Facility (ETF). The removal skid is a filtering system that will remove excess carbon dioxide generated during the wastewater treatment process. This additional capability is necessary to treat the Waste Treatment and Immobilization Plant Effluent Management Facility waste.

The Liquid Effluent Retention Facility and ETF are mixed-waste treatment and storage units for treating liquid effluents from operating Hanford cleanup facilities. These facilities include the 242-A Evaporator and the Waste Treatment and Immobilization Plant’s Effluent Management Facility (when it becomes operational) to support treating tank waste using the Direct-Feed Low-Activity Waste approach.

The comment period runs from March 31 through May 29, 2022. A virtual public meeting will be held May 3 at 5:30 p.m. PT. To participate via Microsoft Teams, please follow the instructions below:

Join on your computer or Teams mobile app
Click here to join the meeting

Join with a video conferencing device
Video Conference ID: 111 329 341 1

Or call in (audio only)
(509) 931-1284 United States
(833) 633-0875 United States (Toll-free)
Phone Conference ID: 881 182 033# 

Please submit any comments by May 29, electronically (preferred) or by mail to:

Washington State Department of Ecology
3100 Port of Benton Boulevard
Richland, WA 99354

The proposed permit modification and supporting documentation is available online during the public comment period on the Hanford events calendar, the Hanford Administrative Record, and at the Hanford Public Information Repositories. Please see the attached summary fact sheet.

Questions? Please contact Dana Gribble, Hanford Mission Integration Solutions, at, or Daina McFadden, Washington State Department of Ecology, at

To request disability accommodation, please contact Dana Gribble, or (509) 376-5917 at least 10 working days prior to the event. DOE makes every effort to honor disability accommodation requests.

Fact Sheet
Carbon Dioxide Removal Skid at the Effluent Treatment Facility Public Meeting
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