September 19, 2012, 1:00 PM - 3:00 PM, EDT (17:00-19:00 GMT)

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This webinar within the series will focus on mining-influenced water (MIW) — any water whose chemical composition has been affected by mining, mineral or metallurgical processing. Topics to be presented include MIW treatment technologies being employed at both active and abandoned mining sites, AMDTreat - a tool for estimating abatement costs for acid rock drainage, innovative acid rock drainage remediation techniques (research at the Berkeley Pitlake site in Butte, Montana will be presented as a case study), and environmental hazards posed by PCBs deposited by equipment at mining sites.

• Dan Bench, EPA Region 8 (bench.dan@epa.gov)
  
  Dan Bench will discuss the issue of PCBs deposited by equipment at mining sites. Many PCB-containing pieces of electrical equipment remain in use and at abandoned mines, releasing PCBs into the environment, including water. This presentation will address five arenas of PCBs: environmental hazards, identification, hidden sources to look for, potential liabilities, and what to do when PCBs are found.
  
  
• Michele Mahoney, EPA Technology Innovation and Field Services Division (mahoney.michele@epa.gov)
  EPA is compiling information on mine influenced water treatment technologies being employed at both active and abandoned mining sites, such as types of treatment technologies (existing and innovative), treatment effectiveness and limitations, cost to implement, and applicability of treatments. In this presentation, EPA will present a draft summary table resulting from our initial search for information. Results of this research will be compiled in a fashion that can be consumed for the public (i.e. website, webinar).
  
  
• Brent Means, U.S. Office of Surface Mining (bmeans@osmre.gov)
  Brent Means will present AMDTreat, a computer application for estimating abatement costs for acid rock drainage. AMDTreat can assist a user in estimating costs to abate water contamination using a variety of passive and chemical treatments technologies.
  
  
• Dr. Courtney Young, Montana Tech of the University of Montana (cyoung@mtech.edu)
  Courtney Young will present recent research on acid rock drainage remediation with slag from pyrometallurgical operations at the Berkeley Pitlake site in Butte, Montana. Results indicate that slags can be used to either supplement or replace lime, depending on the application.
  
  

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

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