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August 23, 2016
Event: The U.S. Department of Energy (DOE) invites you to provide input on the 100 D/H Proposed Plan
Category: Comment Period / Feedback Opportunity
Event Date: July 26 — September 16, 2016

The 100-DR-1, 100-DR-2, 100-HR-1, and 100-HR-2 Source OUs and the 100-HR-3 Groundwater OU are collectively referred to as the 100-D/H Area. The 100-D/H Area is located along the Columbia River and includes three deactivated nuclear reactors and support facilities where plutonium was produced. The reactors and processes associated with past operations generated large amounts of liquid and solid wastes. The groundwater and soil in the 100 D/H Area were contaminated by liquid waste discharged into basins, cribs, trenches, and ponds.

A proposed plan under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 identifies four cleanup alternatives to address soil and groundwater contamination. The preferred alternative calls for increased pump-and-treat capacity and monitored natural attenuation for groundwater and remove, treat and dispose with institutional controls for the contaminated soil sites.

Copies of the proposed plan are available at the Administrative Record, 2440 Stevens Drive, Richland, WA or online:

The Administrative Record index for 100 DH can be accessed at:

A Public comment period will run from July 25 – September 16, 2016.
You can submit comments by September 16, 2016 to:

Rich Buel
Department of Energy
P.O. Box 550, A7-75
Richland, WA 99352
(509) 376-5803

Fact Sheet

100-D/H Operable Units RI/FS


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