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Latest NMI News Recent Documents

EPA Announces Completed Record of Decision

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.

Additional Groundwater Investigation for 1,4-dioxane Commences

USEPA (EPA) approved the Groundwater Investigation Work Plan on 27AUG15 for further delineation of the contaminant 1,4-dioxane. The investigation will include installation of additional monitoring wells, comprehensive groundwater quality monitoring to define the extent of the 1,4-dioxane plume and water level monitoring. EPA is considering accelerating this portion of the proposed remedy and performing it as a Non-Time-Critical Removal Action (NTCRA) rather than as part of the overall remedy. Crews mobilized to the site and began well installation today, 1SEP15.


Crews beginning installation of MW-35, adjacent to Main street.

Fall Shipping Campaign Complete

The site completed the second shipping campaign of 2015 on 31JUL with a total of 40 intermodal containers shipped containing 731,930 pounds (366 tons) of waste for disposal.

Loading activities on 29JUL15 in Building D for off-site shipping campaign.

Loading activities on 29JUL15 in Building D for off-site shipping campaign.

Community Involvement  Recent Documents

CREW and 2229 Main Street met with Agencies on site on 17 March 2015

Public groups and de maximis met with the Agencies on 17 MAR 2015 on site to discuss the NTCRA status and schedule for building demolition as well as the planning for the remedy for 1, 4-dioxane in groundwater. The 2229 Main Street Committee provided an update to the Town’s approach to potentially taking the Site.

Public Meeting Presentation 12 NOV 2014

USEPA presented the Proposed Remedial Action Plan for the NMI Superfund Site last night at 6:30 pm  at the Concord Town Hall Meeting Room at 22 Monument Square, Concord, MA. To download a copy of the presentation, click here.

Last updated on October 2, 2015