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Radiological Projects &
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Superfund (Federal and State) and Other Multi-Party Projects

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Radiological Projects &
Construction Management

de maximis' representative project experience includes:

Maxey Flats Superfund Site, Kentucky

The Maxey Flats Superfund Site is a former low-level radioactive waste landfill permitted by the state of Kentucky for disposal of radioactive waste.  de maximis provided Project Coordination, Construction Management, IQAT and all public relations efforts on behalf of the PRP Group.  The project involved pumping and solidifying over one million gallons of radioactive leachate, construction of a 60-acre cap and storm water drainage system, enlargement of the detention basin, construction of perimeter drainage channels and demolition and disposal of all buildings inside the Restricted Area.

Reading Slag Pile Site, Reading, PA

de maximis served as the Project Manager/Construction Manager for the successful completion and implementation of the Decommissioning Plan (10 CFR Part 20 Subpart E), which led to termination of the source material license for this complex radiological site.  The site closure incorporated a rip-rap cover designed and installed in accordance with NRC regulations for Erosion Protection as provided in NUREG-1623 (Design of Erosion Protection for Long-Term Stabilization (Final), USNRC, Sept 2002).  The project site was located on a steep slope adjacent to a large river and required special equipment and construction methods to build the rip-rap cover.  de maximis coordinated all work with the NRC (regional and headquarters), PADEP and local municipal departments.

Nuclear Metals, Inc. (NMI) Superfund Site, Concord, Massachusetts (Ongoing)

The NMI Superfund Site was originally a specialty metal research and development facility that was licensed to possess enriched, natural and depleted uranium (DU) and natural thorium.   Most of the operations at the 46-acre Site were conducted under contracts with the United States Atomic Energy Commission and the United States Department of Defense, along with some private industry, in the investigation and development of materials for missiles, airframes and other components.  NMI was a contract manufacturer of depleted uranium penetrators for DOD.  de maximis is the PRP Group’s Project Coordinator/General Contractor for the implementation of the RI/FS, which has included delineation of contamination in an on-site pond, landfill, sphagnum bog, and groundwater plumes of VOCs and uranium.  Other significant actions during the RI process included completing a removal action to address buried drums and preparation of an Engineering Evaluation / Cost Analysis (EE/CA) to evaluate options for the 5-acres of Site buildings and equipment contaminated with DU and beryllium.  EPA has selected a $65 million action that will result in emptying and demolishing the buildings with off-Site disposal.  de maximis has coordinated the RI/FS work with EPA, MADEP, MADPH’s Radiological Control Program and handled public relations with two highly active citizens groups.  Part of the public relations has included preparation and management of a public communications website (www.nmisite.org).

Confidential Client, Maryland (Ongoing)

de maximis is the client’s oversight representative for the demolition and remediation of radiological and other contamination associated with a portion of a building under the Formerly Utilized Sites Remedial Action Program (FUSRAP).  de maximis’ primary responsibility is to represent the client’s commercial and technical interests during development and implementation of the project plans.  de maximis is the client’s representative during all field work performed by their contractor and works closely with the US Army Corps of Engineers field representatives during implementation of the remedy.  In addition, because the work is performed within an operating facility, the remediation work must be closely coordinated with ongoing plant operations.

Ashtabula River, Ashtabula, Ohio

de maximis held a “Possession Only” license for low-level radioactive waste issued by the Ohio Department of Health (ODH) for the Ashtabula River Dredging and Disposal Project. The sediment and associated contact materials dredged from the river contained low-levels of uranium, radium, and thorium (along with PCBs, chlorinated compounds, and heavy metals) contaminants.  As a result, the ODH would not allow the dredged material to be co­mingled with non-radiological waste for acceptance at any existing disposal facilities.  This required the design and construction of a site-specific, dedicated, low-level radiological containment facility for this project.  The containment facility, which meets the Toxic Substance Control Act (TSCA) design requirements, contains nearly 750,000 cubic yards of dredged material from the river. 

In addition to managing the entire dredging project (from planning to design and through remedial action), de maximis provided health physicist oversight for the duration of the dredged material transfer operations and performed employee and field monitoring in accordance with ODH requirements and the approved Site-Specific Health Physics Manual.  Upon completion of the dredging project, no radiological contamination was detected outside the containment facility and ODH terminated the license without requiring any further action.

Metcoa Site, Pulaski, PA

de maximis managed and provided construction oversight of the implementation of a PRP-led Superfund removal action performed under a CERCLA 106 Unilateral Consent Order.  This EPA Region III site involved a former metal reclamation facility which had processed low‑level radioactive materials.  The former reclamation activities left behind a legacy of radioactive thorium compounds, along with soils contaminated with high concentrations of cadmium and nickel.  Mixed waste residuals were also found to be on site.  The project involved the characterization, removal and disposal of approximately 1000 drums and containers, and 3,500 cubic yards of contaminated soil.  de maximis also coordinated the preparation and development of work plans for additional contaminant studies that were performed subsequent to the initial removal action.



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