Why Well-Done when Medium-Rare will Do? Another Look at Containment in the Age of Stabilization/Solidification

0

Poster:

Why Well-Done when Medium-Rare will Do? Another Look at Containment in the Age of Stabilization/Solidification

Presenter:  Ryan S. Sheaffer (GEI Consultants, Inc.)
Authors:  Ryan Sheaffer and Barry Raus (GEI Consultants, Inc.)

Abstract:

Current remediation trends to address soil contamination at former MGP sites consists of excavation (hog and haul) when achievable or in-situ stabilization/solidification (ISS) when excavation become too costly.  Both remedial options require the removal of subsurface structures and vessels resulting in high construction and disposal costs.  A formidable alternative that allows for structures and vessels to remain in-place with a high certainty of protection of groundwater is the placement of vertical and horizontal barriers via traditional slurry wall methods, jet-grout emplacement, and/or deep soil mixing.  While the overall footprint of the remedial action may increase to ensure full encapsulations, the cost reduction realized by using an existing confining layer or creation of a vertical barrier may exceed the cost required to remove and dispose of shallow structures.  Additionally, spoils generated from the creation of the containment barrier walls can be used to create a low-permeable cover, thus reducing recharge into the containment structure and limiting the need for long-term groundwater management within the contained area.   The installation of containment walls within soils outside of the contaminated zone also eliminated the need for costly and time-delayed treatability studies to demonstrate that the contaminated soil has been mitigated and isolated from the groundwater flow regime.

 

To view the full Poster Presentation List for MGP 2017 view this link:

http://mgpsymposium.com/poster-presentations/

Developed by Autograph Media Group