Meetings

Estimating Times of Remediation Associated with Monitored Natural Attenuation and Contaminant Source Removal

U.S. Geological Survey and the Virginia Polytechnic Institute and State University (Virginia Tech) presented the National Ground Water Association's short course "Estimating Times of Remediation Associated with Monitored Natural Attenuation and Contaminant Source Removal" in:

• Portland, Oregon (February 23-24, 2004)
• Columbus, Ohio (November 3-4, 2003)
• Cheyenne, Wyoming (March 18-19, 2003) - hosted by the Wyoming Department of Environmental Quality
• Orlando, Florida (December 5-6, 2002)
• Scottsdale, Arizona (May 6-7, 2002)

This course presented a decision-making framework and methodology for assessing monitored natural attenuation (MNA) and estimating timeframes required for natural attenuation processes to lower contaminant concentrations to regulatory goals. An interactive computer program (Natural Attenuation Software, NAS) developed by the USGS and Virginia Tech in cooperation with the U.S. Navy's Naval Facilities Engineering Command (NAVFAC), Southern Division was demonstrated at the course. The software is designed to provide quantitative estimates of how effectively source-zone treatment will reduce plume size and how long remediation is expected to take using site-specific data and remediation goals.

More Information

• Software Provides Estimates of How Long it Will Take for Remediation Efforts to Achieve Their Goals
• Chapelle, F.H., Widdowson, M.A., Brauner, J.S., Mendez, E., Casey, C.C., 2003, Methodology for estimating times of remediation associated with monitored natural attenuation: U.S. Geological Survey Water-Resources Investigations Report 03-4057, 51 p.
• NAS Training Information
• NAS Information
• National Ground Water Association's Training and Event Calendar
• Instructors
  • Frank Chapelle, Toxic Substances Hydrology Program, U.S. Geological Survey
  • Mark Widdowson, Department of Civil and Environmental Engineering, Virginia Tech
  • Eduardo Mendez, Department of Civil and Environmental Engineering, Virginia Tech

USGS Information on Natural Attenuation

• Microbial Degradation of Chloroethenes in Ground Water Systems
  
• Topical Information on Natural Attenuation
  
• Listing of Toxics Program Natural Attenuation Remediation Related Activities
  
• Listing of Other USGS Natural Attenuation Remediation Related Activities

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