Transcript NRMRL Mining Activities - Colorado State University

NRMRL Mining Activities
Rocky Mountain Regional HSRC Briefing
October 9, 2002
Trish Erickson, Acting ALD-Waste
513.569.7406
[email protected]
Relevant Activities
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Mining-Specific
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EPA/DOE Mine Waste Technology Program
SITE Demonstrations
Research
Technical Assistance & Technology Transfer
Mining-Related
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Watershed Protection & Restoration
Contaminated Sediments
EPA/DOE Mine Waste Technology Program
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At-Source Controls
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Water Treatment Options
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mine sealing, in-situ SRB reactors
passive and low-maintenance
As, CN-, Hg, NO3, Se
Revegetation/Stabilization
Technology Transfer
EPA/DOE Mine Waste Technology Program
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FY02 Proposal Solicitation Emphasis
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source control for prevention of metal release
and acid rock drainage
Treatments for low flows in remote settings
Major Meetings
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2002 Hardrock Mining Conference
2003 Mining Impacts on Tribal Lands
Roger Wilmoth
513.569.7509
www.epa.gov/ORD/NRMRL/std/mtb
SITE Demonstrations
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Current Projects
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Leviathan Mine
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lime lagoons, constructed wetlands, biphasic
lime treatment
Completed Projects
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Constructed Wetlands (Colorado DPHE)
Clay-Based Grouting
Annette Gatchett
513.569.7697
www.epa.gov/ORD/NRMRL/SITE
Research: Permeable Reactive Barrier for
Arsenic Treatment
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Pilot-scale Fe(0) PRB at
East Helena smelter site
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Performance over time
Mechanisms
Impact on site
hydrogeochemistry
Longevity
Associated lab studies
Rick Wilkin, 580.436.8874
Bob Puls, 580.436.8543
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
Technical Assistance & Tech Transfer
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Site-specific assistance to many mine sites
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Site characterization
Remedy screening/prioritization
Remedy selection
Ed Bates
513.569.7774
Performance evaluation
Technology transfer
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Documents
Meetings
www.epa.gov/ttbnrmrl
Technical Support
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Semi-passive water
treatments
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Rock-filled bioreactors
at Rio Tinto, Leviathan
Conventional
bioreactor at Lutrell
Oxidation/precipitation
at Opportunity Ponds
Alternative alkali
selection at Leviathan