Design and Implementation of Deep Excavation for PCB Removal
The Problem
As part of the Record of Decision at this Superfund site, numerous early actions were proposed for implementation prior to the development of a larger, more comprehensive remedy. TIG Environmental assisted our client in the design and implementation of a deep excavation to remove high levels of polychlorinated biphenyl (PCB) contamination along the riverbank. The project was complicated by steep slopes and adjacent shoreline structures, as well as the potential integration with a separate upland soil removal operation and the overall river remedy.
The Solution
TIG Environmental assisted our client in strategizing and implementing an interim action, including dredging near-shore sediments. We played a critical role in negotiating with the agencies and designing a sheet-pile cofferdam to enclose the operations.
Value Added
TIG Environmental moved a multi-stakeholder project forward to completion, implementing a practical solution at a complex site. Our proposed solution was accepted by the client, the regulators, and the community.
