Monitored Natural Attenuation of Metals and Radionuclide-Contaminated Sites

1. Monitored Natural Attenuation of Metals and Radionuclide-Contaminated Sites Pat Brady Sandia National Laboratories Mike Truex Pacific Northwest National Laboratory Chuck NewellGSI Karen Vangelas Savannah River National Laboratory Miles Denham Savannah River National Laboratory Sponsored by: DOEEM-22 Attenuation-Based Remedies for Metals and Radionuclide Project (Leads: M. Denham and K. Vangelas, Savannah River National Laboratory) Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.

2. Recent EPA Guidance for MNA of Metals and Radionuclides Volume 3 Assessment for Radionuclides Including Isotopes of Cesium, Iodine, Neptunium, Plutonium, Strontium, Technetium, and Uranium http://www.epa.gov/ada/download/reports/600R07139/600R07139-01.pdf http://www.epa.gov/ada/download/reports/600R07140/600R07140.pdf In Preparation

4. The Scenarios Approach

7. Example: Uranium Example: Arsenic

8. Enhanced Attenuation