Assessing Environmental Remediation Technologies: Groundwater and Soils

This two-part seminar series, jointly hosted by RemPlex and the IAEA, uses case studies to provide an analysis on remedy efficiency, effectiveness, sustainability, availability, complexity, long-term requirements, and more.

• The groundwater remediation technologies seminar was held May 23, 2023.
• Save the date for the companion seminar on soils and sediments. The August 15 registration is open.
• Read more here

Environmental Behavior and Remediation of Contaminated Sites with Cationic Radionuclides: The Cases of Cs and Sr

February 14, 2023

A discussion of the current understanding of cesium and strontium behavior in complex contaminated sites, including data on the deposition, distribution, fate, and transport; permeable reactive barriers; and emerging remediation strategies.

Read more here

2022 Presentation Highlights

From the Classroom to Cleanup: Internships in Environmental Science

December 14, 2022

Learn about research being done to address environmental challenges and how you could be part of that through internship programs such as SULI, CCI, MSIPP, SRAP, and YWIS.

Read more here

Chlorinated Solvent Remediation at the Petro-Processors Superfund Site in Louisiana

Remediation is underway at the Petro-Processors, Inc., Superfund site north of Baton Rouge, Louisiana. Past practices at the site involved the disposal of liquid wastes that were a mixture of hydrocarbons and chlorinated organics.

Read more here

Using Risk Assessment to Guide Environmental Remediation Decisions

The primary objective of environmental remediation is to reduce potential exposures to hazardous substances to acceptably safe levels. The determination of cleanup objectives frequently involves the adoption of existing standards, such as...

Read more here

Climate Resilience in Remedial Design and Implementation

Environmental remediation of complex sites typically involves the implementation and operation of remedial actions over long time frames. The process of selecting and integrating effective remediation and treatment technologies based on...

Read more here

Source Area Remediation in Complex Subsurface Conditions At Joint Base Lewis-McChord

Learn the strategic monitoring approaches and remedy design work to address subsurface contamination from trichloroethene (TCE), which was inadvertently released from deteriorating drums in a Joint Base Lewis-McChord landfill. 

Read more here

Visual Sample Plan: Spatial Sampling and Analysis Capabilities

The Visual Sample Plan is a geospatial software tool that supports the development of a defensible sampling plan for environmental remediation. Based on statistical sampling theory and the statistical analysis of sample results...

Read more here

Development of Options to Limit Groundwater Impacts from Silo Leakage

The Magnox Swarf Storage Silos is a legacy waste storage facility at the Sellafield Nuclear Site in northwest England. Sellafield Ltd is removing the wastes from the building and exporting them to a modern storage system, but...

Read more here

Moving Beyond Subjectivity: Informed Optimization Concepts in Enhancing Groundwater Extraction and Recirculation Remedy Performance

A team of experts from environmental consulting firm Arcadis (Chief Hydrogeologist Scott Potter, Vice President Kelly Houston, and Project Hydrogeologist Jennifer Wahlberg) discussed contaminant plume restoration data.

Read more here

Web-Based Data Access and Analysis Workbench to Support Environmental Restoration Decision-Making

PNNL Senior Development Engineer Chris Johnson and Data Scientist Patrick Royer discussed how web-based tools offer an improved approach for working with large environmental data sets. 

Read more here

Modeling and measuring the transport of foam in porous media in the presence of nanoparticles

Dr. Valentina Prigiobbe with the Stevens Institute of Technology explains a numerical model developed for the analysis of the removal of a contaminant (trichloroethylene, or TCE) from low permeability porous media and provides examples of...

Read more here

Hanford 200-PW-1 Operable Unit Soil Vapor Extraction Endpoint Evaluation

Chris Johnson, PNNL senior development engineer, and Mark Byrnes, CH2M Hill Plateau Remediation Company project manager, discuss following Soil Vapor Extraction guidance and assessing performance data to present lines of evidence to...

Read more here

Calcium carbonate minerals as scavengers of metals and radionuclides for natural attenuation and remediation

Calcium carbonate interactions affect contaminant fate and transport in the subsurface environmental systems. Earth Scientist Amanda Lawter and Lab Fellow Nik Qafoku provide insights on the use of calcium carbonate natural attenuation mechanisms and...

Read more here

Integrating Key Capabilities for the Remediation of Complex Sites

PNNL integrates a range of capabilities in multi-scale experimentation, modeling and simulation, and characterization and monitoring to translate science innovation into practical, cost-effective solutions for field implementation.

Read more here

Evaluation Approaches for Transitioning from Active to Passive Remediation

In the context of managing complex sites and phased remedies, there is a need to defensibly support decisions to transition between remediation elements, in particular for transitioning from active to passive remediation. 

Read more here

Understanding Environmental Site Conditions: What do we need to know to select and implement effective remedies?

Technical information about contaminants, exposure pathways, and factors that affect how candidate remedies perform at a specific site are used to support selecting and implementing environmental remedies. How do we determine the type and extent of...

Read more here

Implications of Uranium Behavior in the Subsurface for Environmental Remediation

Environmental Engineer Jim Szecsody and Earth Scientist Hilary Emerson share insights gathered from uranium characterization and remediation efforts at the Hanford Site in Washington and at the Rifle Mill Site in Colorado.

Read more here

Introducing the Center for the Remediation of Complex Sites

Director Dawn Wellman discusses how RemPlex fosters technical stewardship, builds partnerships, and advanced the R&D needed to translate science and engineering innovation into practical, adaptive, operational solutions to address complex site remediation.

Read more here