February 13, 2013, 1:00 PM - 3:00 PM, EST (18:00-20:00 GMT)

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Lecture 1 - Mine Rock Characterization Tools and Methodologies Used to Predict the Potential for Acid Rock Drainage and Metal Mobility
Presenter: Dr. Ann Maest (Stratus Consulting)
View Session Archive
Download Slides: 16.1MB/PPT | 8MB/Color PDF | 5.7MB/B&W PDF

The presentation will discuss current practices to characterize mine rock mined materials for purposes of predicting acid rock drainage/metal leaching. Specific topics covered include:

1. Overview of interrelationships between geochemical characterization, modeling, and mine management.
   
2. Geochemical characterization approaches.
   
   • Static tests - when to use and pros/cons of most common tests.
     
   • Kinetic tests - when to use and pros/cons of most common tests.
3. Interpretation and use of geochemical characterization data; method uncertainties.
   
4. Resources available for further information on the topics covered.

Lecture 2 - Predicting and Modeling Water Chemistry Associated with Hardrock Mine Sites
Presenter: Dr. D. Kirk Nordstrom (U.S. Geological Survey)
View Session Archive
Download Slides: 16.9MB/PPT | 33MB/Color PDF | 11MB/B&W PDF

Specific topics covered during this lecture include:

1. Introduction to geochemical modeling: models, codes, prediction, modeling pyrite oxidation.
   
2. Types of geochemical modeling: equilibrium speciation, mass transfer, reactive-transport, transient-state.
   
3. Input data and output (GIGO): Thermodynamic, kinetic, and field data.
   
4. Some examples and applications.
   
5. Confidence in modeling results: issue of validation and verification.
   
6. Modeling guidelines: Issues regulators should know and questions regulators should ask when reviewing modeling efforts.
   
7. Resources and references available for further information on the topics covered.

• Dr. Ann Maest, Stratus Consulting (AMaest@stratusconsulting.com)
• Dr. D. Kirk Nordstrom, U.S. Geological Survey (dkn@usgs.gov)

• Jean Balent, U.S. EPA Technology Innovation and Field Services Division (balent.jean@epa.gov)
• Michele Mahoney, U.S. EPA Technology Innovation and Field Services Division (mahoney.michele@epa.gov)

• Adobe^® Connect™ Mobile Apps
• Adobe® Connect™ Visual Quick Start Guide (754KB/2pp/PDF)

Press the "Go to Seminar" button to join the Adobe^® Connect™ meeting room. Please be at this location at the beginning of the seminar.