Pangea Group

Client:

Bechtel Jacobs/Department of Energy

Scope Of Work

This project included the dismantlement and demolition of Bldgs. 9610, 999-4, and Tank 9500-004. The scope included removal and remediation of asbestos containing materials, mercury components, building debris and concrete, associated metals, and PCB’s.

Due to past operations at the U.S. Department of Energy’s Y-12 National Security Complex, releases of mercury had occurred to the environment. Pangea Inc. was contracted to construct a new 300 – gpm water treatment system to remove total mercury from groundwater discharged from Outfall 51 and groundwater collected in the basement sumps of Building 9201-2. The Big Spring Water Treatment Project was constructed by Pangea Inc. as a Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) action in accordance with the Record of Decision for Phase I Interim Source Control in the Upper East Fork Popular Creek Characterization Area, Oak Ridge, TN.

Pangea was required to perform selective demolition of existing structures at the site, characterize and dispose of debris, construct an interim collection and mercury treatment system, construct the Big Spring Water Treatment Facility including: construction of a pre-fabricated metal building to house the new treatment system, and provide system testing and startup support. The collection system was comprised of piping from an existing spring box, Building 9201-2 sumps, a wet well and an equalization tank. The treatment system consisted of two parallel trains of triplex granular activated carbon columns operated in series. The project included the submission and approval of project-specific work plans, participation in a readiness review, and mobilization. Pangea was responsible for the entire turn-key project.