1. NRMRL Mining Activities Rocky Mountain Regional HSRC Briefing October 9, 2002 Trish Erickson, Acting ALD-Waste 513.569.7406 erickson.patricia@epa.gov

2. Relevant Activities Mining-Specific EPA/DOE Mine Waste Technology Program SITE Demonstrations Research Technical Assistance & Technology Transfer Mining-Related Watershed Protection & Restoration Contaminated Sediments

3. EPA/DOE Mine Waste Technology Program At-Source Controls mine sealing, in-situ SRB reactors Water Treatment Options passive and low-maintenance As, CN -, Hg, NO 3, Se Revegetation/Stabilization Technology Transfer

4. EPA/DOE Mine Waste Technology Program FY02 Proposal Solicitation Emphasis source control for prevention of metal release and acid rock drainage Treatments for low flows in remote settings Major Meetings 2002 Hardrock Mining Conference 2003 Mining Impacts on Tribal Lands Roger Wilmoth 513.569.7509 www.epa.gov/ORD/NRMRL/std/mtb

5. SITE Demonstrations Current Projects Leviathan Mine lime lagoons, constructed wetlands, biphasic lime treatment Completed Projects Constructed Wetlands (Colorado DPHE) Clay-Based Grouting Annette Gatchett 513.569.7697 www.epa.gov/ORD/NRMRL/SITE

6. Research: Permeable Reactive Barrier for Arsenic Treatment Pilot-scale Fe(0) PRB at East Helena smelter site Performance over time Mechanisms Impact on site hydrogeochemistry Longevity Associated lab studies Rick Wilkin, 580.436.8874 Bob Puls, 580.436.8543

7. Research: Penn Mine Microbiology and Geochemistry Overview: Acid drainage (Cu, Zn, Cd) from the Penn Mine discharges into Camanche Reservoir via ground water and surface water runoff. Remediation efforts have targeted above ground contamination. This project investigates subsurface geochemical and microbiological processes that impact subsurface contaminant fluxes to the reservoir. Rick Wilkin, 580.436.8874 with Charles Alpers, USGS

8. Technical Assistance & Tech Transfer Site-specific assistance to many mine sites Site characterization Remedy screening/prioritization Remedy selection Performance evaluation Technology transfer Documents Meetings Ed Bates 513.569.7774 www.epa.gov/ttbnrmrl

9. Technical Support Semi-passive water treatments Rock-filled bioreactors at Rio Tinto, Leviathan Conventional bioreactor at Lutrell Oxidation/precipitation at Opportunity Ponds Alternative alkali selection at Leviathan