Skip to main content

PNNL

  • About
  • News & Media
  • Careers
  • Events
  • Research
    • Scientific Discovery
      • Biology
        • Human Health
        • Integrative Omics
        • Microbiome Science
      • Chemistry
        • Catalysis
        • Chemical Physics
      • Computational Research
        • Artificial Intelligence
        • Computational Mathematics & Statistics
        • Graph and Data Analytics
        • High-Performance Computing
        • Software Engineering
        • Visual Analytics
      • Earth System Science
        • Plant Science
        • Atmospheric Science
        • Terrestrial Aquatics
        • Subsurface Science
        • Ecosystem Science
        • Coastal Science
      • Materials Science
        • Solid Phase Processing
        • Science of Interfaces
        • Precision Materials by Design
        • Materials in Extreme Environments
      • Nuclear & Particle Physics
        • Dark Matter
        • Neutrino Physics
        • Flavor Physics
        • Fusion Energy Science
      • Quantum Information Science
    • Energy Resiliency
      • Electric Grid Modernization
        • Distribution
        • Transmission
        • Grid Architecture
        • Grid Analytics
          • AGM Program
        • Grid Cybersecurity
        • Emergency Response
      • Energy Efficiency
        • Building Technologies
          • Building-Grid Integration
          • Advanced Lighting
        • Residential Buildings
          • Energy Efficient Technology Integration
          • Home Energy Score
          • Building America Solution Center
        • Commercial Buildings
        • Federal Buildings
          • Federal Performance Optimization
          • Resilience and Security
        • Building Energy Codes
        • Appliance and Equipment Standards
      • Energy Storage
        • Grid Energy Storage
        • Vehicle Energy Storage
      • Environmental Management
        • Environmental Remediation
        • Waste Processing
        • Radiation Measurement
      • Fossil Energy
        • Subsurface Energy Systems
        • Advanced Hydrocarbon Conversion
      • Nuclear Energy
        • Reactor Licensing
        • Reactor Operations
        • Fuel Cycle Research
        • Advanced Reactors
      • Renewable Energy
        • Hydropower
          • Environmental Performance of Hydropower
          • Hydropower and the Electric Grid
          • Hydropower Cybersecurity and Digitalization
          • Materials Science for Hydropower
          • Water + Hydropower Planning
        • Marine Energy
          • Environmental Monitoring for Marine Energy
          • Marine Biofouling and Corrosion
          • Marine Energy Resource Characterization
          • Testing for Marine Energy
          • The Blue Economy
        • Wind Energy
          • Distributed Wind
          • Offshore Wind
          • Uncertainty Quantification
          • Wildlife and Wind
          • Wind Data Archive and Portal
          • Wind Resource Characterization
        • Geothermal Energy
        • Solar Energy
      • Transportation
        • Vehicle Technologies
          • Emission Control
          • Energy-Efficient Mobility Systems
          • Lightweight Materials
          • Vehicle Electrification
        • Bioenergy Technologies
          • Algal Biofuels
          • Aviation Biofuels
          • Waste-to-Energy and Products
        • Hydrogen & Fuel Cells
    • National Security
      • Computing & Analytics
        • Artificial Intelligence
        • Computational Mathematics & Statistics
        • Graph and Data Analytics
        • High-Performance Computing
        • Software Engineering
        • Visual Analytics
      • Cybersecurity
        • Discovery and Insight
        • Proactive Defense
        • Trusted Systems
      • Nuclear Nonproliferation
        • Stakeholder Engagement
        • Technical Training
      • Weapons of Mass Effect
        • Explosives Detection
        • Chemical & Biological Signatures Science
        • Radiological & Nuclear Detection
    • Lab Objectives
    • Publications & Reports
    • S&T Capabilities
  • People
    • Inventors
    • Diversity
    • Lab Leadership
    • Lab Fellows
    • Staff Accomplishments
  • Partner with PNNL
    • Academia
      • Distinguished Graduate Research Programs
      • Internships
      • Visiting Faculty Program
      • Joint Appointments
      • Joint Institutes
    • Community
      • STEM Education
      • Philanthropy
      • Volunteering
      • Economic Impact
    • Industry
      • Industry Partnerships
      • Licensing & Technology Transfer
      • Entrepreneurial Leave
  • Facilities & Centers
    • All Facilities
      • Atmospheric Radiation Measurement User Facility
      • Bioproducts, Sciences, and Engineering Lab
      • Environmental Molecular Sciences Laboratory
      • Institute for Integrated Catalysis
      • Marine and Coastal Research Laboratory
      • Radiochemical Processing Laboratory
      • Shallow Underground Laboratory
      • Systems Engineering Building
      • Wasteform Development Laboratory
      • PNNL Seattle Research Center
      • PNNL 5G Innovation Studio

Center for the Remediation of Complex Sites

  • Leadership
  • Capabilities
  • Working With Us
  • Resources
    • Seminar
    • Tools
    • Training
  • News and Highlights
    • Publications

RemPlex Seminars

Next Seminar • Save the Date • Previous Seminars

Next Seminar: 

Flyer with information about a Jan. 26, 2021, seminar on soil vapor extraction for environmental remediation

January 26, 2021: "Hanford 200-PW-1 Operable Unit Soil Vapor Extraction Endpoint Evaluation" will be presented by Chris Johnson, PNNL senior development engineer, and CH2M Hill Plateau Remediation Company project manager Mark Byrnes.

The seminar starts at 12:30 p.m. PST via ZoomGov (Meeting ID: 160 304 1646) and is open to the public. It's part of the Center for the Remediation of Complex Sites (RemPlex) Seminar Series.

Release of carbon tetrachloride (CT) from 1955 to 1973 into the soil column in the 200-PW-1 Operable Unit at the U.S. Department of Energy's Hanford Site resulted in vadose zone and groundwater contamination. Starting in the early 1990s, soil vapor extraction (SVE) was the defined remedy for vadose zone CT contamination, while pump-and-treat was used for groundwater contamination. 

After over 20 years of SVE operations, PNNL collaborated with site contractor CH2M Hill Plateau Remediation Company and consultants Freestone Environmental Services to evaluate observed data, Subsurface Transport Over Multiple Phases(STOMP) numerical model results, and Soil Vapor Extraction Endstate Tool (SVEET) estimates of the impacts of the vadose zone contaminant source. 

This information was evaluated in the context of SVE System Optimization, Transition, and Closure Guidance to provide multiple lines of evidence to demonstrate that the SVE remedy could be terminated. Johnson and Byrnes will discuss the process involved with assessing performance data and following the SVE guidance to present lines of evidence for a path forward to terminate the SVE remediation system.

File

RemPlex seminar flyer (PDF w/ZoomGov link): Soil Vapor Extraction, Jan. 26, 2021

 

Save the Date: Upcoming Seminars

February 23, 2021: "Modeling and measuring the transport of foam in porous media in the presence of nanoparticles," will be presented by Valentina Prigiobbe, assistant professor, Department of Civil, Environmental, and Ocean Engineering at the Stevens Institute of Technology.

 

Previous Seminars: Watch Again

December 1, 2020: "Calcium carbonate minerals as scavengers of metals and radionuclides for natural attenuation and remediation," presented by Earth scientist Amanda Lawter and Laboratory Fellow Nik Qafoku.

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 their application to remediation. Their presentation on December 1, 2020, is part of PNNL’s Center for the Remediation of Complex Sites (RemPlex) Seminar Series.

File

Calcium Carbonates, RemPlex presentation slides, 1Dec2020

File

RemPlex seminar flier (PDF), Calcium Carbonate, 1Dec2020

 

October 27, 2020: “Integrating Key Capabilities for the Remediation of Complex Sites,” presented by Environmental Management sector manager Tom Brouns, Earth scientist Inci Demirkanli, and project manager Vicky Freedman.

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. Environmental remediation experts Tom Brouns, Inci Demirkanli, and Vicky Freedman describe how PNNL applies these capabilities to address the needs of complex sites through all phases of development and remediation, from complex site characterization and conceptual site model development, through remedy selection and implementation, adaptive site management, and long-term stewardship. The October 27, 2020, presentation was part of PNNL’s Center for the Remediation of Complex Sites (RemPlex) Seminar Series.

 

File

Integrating Key Capabilities, RemPlex presentation slides, 27Oct2020

 

September 23, 2020: "Evaluation Approaches for Transitioning from Active to Passive Remediation," presented by Earth scientist Katie Muller and environmental remediation advisor Mike Truex.

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. Available tools and guidance for evaluating transitions are presented and discussed in terms of how they can be applied to support transition decisions. Earth scientist Katie Muller and environmental remediation advisor Mike Truex highlighted the application of approaches under case study field site conditions. Their presentation was September 23, 2020, as part of PNNL’s Center for the Remediation of Complex Sites (RemPlex) Seminar Series.

File

Active to Passive presentation, RemPlex 23Sept2020

 

 

August 11, 2020: Understanding Environmental Site Conditions: What do we need to know to select and implement effective remedies? Presented by Mike Truex.

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 information that is needed to support remediation decisions? What resources and approaches are available to facilitate obtaining the appropriate technical information? Mike Truex, senior project manager, explores these questions using some case study examples. “Understanding Environmental Site Conditions: What do we need to know to select and implement effective remedies?” was presented August 11, 2020, as part of PNNL’s Center for the Remediation of Complex Sites (RemPlex) Seminar Series.

File

Effective Remedies presentation slides, RemPlex 11August2020

June 18, 2020: "Implications of Uranium Behavior in the Subsurface for Environmental Remediation," presented by Jim Szecsody and Hilary Emerson

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. “Implications of Uranium Behavior in the Subsurface for Environmental Remediation” was presented June 18, 2020, as part of PNNL’s Center for the Remediation of Complex Sites (RemPlex) Seminar Series.

Supplemental Materials for Implications of Uranium Behavior in the Subsurface for Environmental Remediation, June 18, 2020

Flier with a photo of the Columbia River and pictures of speakers Hillary and Jim, text describes the seminar

 

 

  1. Efficacy of Acetate-Amended Biostimulation for Uranium Sequestration: Combined Analysis of Sediment/Groundwater Geochemistry and Bacterial Community Structure - Jan. 2, 2018
  2. Abiotic Reductive Immobilization of U(VI) by Biogenic Mackinawite - April 6, 2017
  3. Uranium Fate in Hanford Sediment Altered by Simulated Acid Waste Solutions - Nov. 12, 2015
  4. Influence of Carbon and Microbial Community Priming on the Attenuation of Uranium in a Contaminated Floodplain Aquifer - 2015
  5. Uranium in Framboidal Pyrite from a Naturally Bioreduced Alluvial Sediment - Aug. 19, 2014
  6. Geochemical and Mineralogical Investigation of Uranium in Multi–element Contaminated, Organic–rich Subsurface Sediment - April 28, 2014
  7. Geochemical, mineralogical and microbiological characteristics of sediment from a naturally reduced zone in a uranium-contaminated aquifer - July 26, 2012
  8. Advective Removal of Intraparticle Uranium from Contaminated Vadose Zone Sediments, Hanford, USA - Oct. 7, 2011 
  9. Kinetic Desorption and Sorption of U(VI) during Reactive Transport in a Contaminated Hanford Sediment - May 11, 2011
  10. Interactions of aqueous U(VI) with soil minerals in slightly alkaline natural systems - Sept. 3, 2010
  11. Effect of Extent of Natural Subsurface Bioreduction on Fe-mineralogy of Subsurface Sediments - May 17, 2010
  12. Advective Desorption of Uranium (VI) from Contaminated Hanford Vadose Zone Sediments under Saturated and Unsaturated Conditions - March 6, 2009
  13. Scale-dependent desorption of uranium from contaminated subsurface sediments - Nov. 4, 2008

 

May 15, 2020: "Introducing the Center for the Remediation of Complex Sites," presented by Dawn Wellman. 

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. This seminar was held via Zoom on May 15, 2020.

Slides: Introduction to RemPlex, May 15, 2020

File

Introduction to RemPlex presentation slides, May 15, 2020

Contacts

Tom Brouns
Manager, Environmental Management sector
tom.brouns@pnnl.gov
509-372-6265
Dawn Wellman, Ph.D.
Director, Earth Systems Science Division
Dawn.Wellman@pnnl.gov
509-375-2017
Alicia M. Gorton, Ph.D., PMP
Lidar Buoy Program Manager; Deputy Director, RemPlex
alicia.gorton@pnnl.gov
509-375-6943

PNNL

  • Get in Touch
    • Contact
    • Careers
    • Doing Business
    • Environmental Reports
    • Security & Privacy
  • Research
    • Scientific Discovery
    • Energy Resiliency
    • National Security
Subscribe to PNNL News
Department of Energy Logo Battelle Logo
Pacific Northwest National Laboratory (PNNL) is managed and operated by Battelle for the Department of Energy
  • YouTube
  • Facebook
  • Twitter
  • Instagram
  • LinkedIn