EPA Announces Completed Record of Decision

Total Groundwater Processed

Through mid-June, 2019, approximately 1.35 million gallons of groundwater have been processed through the Permanent Groundwater Treatment System (Final Treatment System), which has been operational since April 2, 2019.

Previously, approximately 17 million gallons of groundwater were processed through the Temporary Groundwater Treatment System (TGTS) to maintain hydraulic capture of the plume. The TGTS operated from May 23, 2017 until the Final Treatment System was operational.

Groundwater NTCRA

Updates

Introduction

Building Demolition
Non-Time Critical
Removal Action (NTCRA)

Environmental Remediation
Remedial Investigation /
Feasibility Study (RI/FS)

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EPA provided a news release 1OCT2015 announcing the completed Record of Decision (ROD) for the Nuclear Metals Site, Inc. The ROD generally includes the following components:
• Excavation and off-site disposal of approximately 82,500 cubic yards of contaminated materials.
• In-Situ stabilization of depleted uranium contaminated soils in the Holding Basin using apatite injection.
• Extraction and ex-situ treatment of groundwater for volatile organic compounds (VOCs) and 1,4-dioxane.
• In-situ treatment of depleted uranium and natural uranium in groundwater.
• Long-term monitoring to monitor the effectiveness of in- and ex-situ treatment.
• Institutional Controls to prevent disturbance of the Holding Basin area, prevent the use of Site groundwater, and address potential vapor intrusion risks.

Last updated on January 6, 2021