Coeur d

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Coeur dAlene Basin TLGRepository PFT meeting

• December 9, 2003

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Meeting Goal
Build a Project Focus Team to participate in
identifying and evaluating viable repository
sites and assist in completing a preliminary
design for one repository in 2004.
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Agenda

• Review of Repository Language in Basin Workplans
• Background and Current Status
• 1995 repository guidelines
• 1998 location analysis
• 2002 ROD language
• Summary of Basin Box repositories
• 2002 IDEQ location analysis
• Big Creek update
• EPA/IDEQ 2004 gameplan
• Path Forward

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2003 Basin Workplan

1. Big Creek Repository will support residential
   yard remediation
2. Additional repository capacity deferred to
   Five-Year Basin workplan

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Five-Year Basin Workplan

1. Utilize Big Creek Repository for yard soils
2. Bring on-line, as needed, repositories to support
   cleanup
3. Bring on-line repository to support ICP
4. Plan and secure priorities to be ready for Upper
   and Lower Basin remediation work for the next
   5-10 years

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2004 Basin Workplan

1. Operate and construct improvements to Big Creek
   Repository
2. Site and design additional repositories (which
   will also support the ICP)

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Agenda

• Review of Repository Language in Basin Workplans
• Background and Current Status
• 1995 repository guidelines
• 1998 location analysis
• 2002 ROD language
• Summary of Basin Box repositories
• 2002 IDEQ location analysis
• Big Creek update
• EPA/IDEQ 2004 gameplan
• Path Forward

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Coeur dAlene Basin Restoration Project
Guidelines for Mine Tailings Repositories

• Developed in 1995
• Collaborative effort
• Non-regulatory guidelines
• Still appropriate and relevant to guide
  repository scoping and development process
• Addresses Location, Design, Construction, and
  Management

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1998 Basin Repository Analysis

• Performed by Coeur dAlene Tribe with input from
  multiple stakeholders
• Used Geographic Information System technology to
  investigate potential locations
• Produced maps, GIS database, and list of 169
  potential sites
• Served as foundation for 2002 IDEQ study

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What did the ROD say about repositories?

• No specific locations identified
• Described 4-step process
• Site identification
• Technical evaluation
• Public input/notification
• Decision documentation

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Location and design requirements

1. Prevent adverse human health and ecological
   impacts and result in improvements wherever
   possible
2. Prevent additional groundwater and/or surface
   impacts
3. Integrate with past or nearby cleanup efforts
4. Comply with all Applicable or Relevant and
   Appropriate Requirements (ARARs)
5. Be appropriate for the characteristics of the
   waste that will be disposed there
6. Be cost-effective
7. Minimize long-term Operations Maintenance costs

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Additional considerations

1. Transportation impacts and costs
2. Economic development or future reuse of the site
   where feasible
3. Geotechnical stability
4. Availability of clean cover material
5. Community acceptance

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Summary of Basin and Box repositories

• Ongoing effort
• Have evaluated 5 Box and 4 Basin repositories
• No standard for location, size, or design
• Common features placement on previously impacted
  areas (e.g., tailings ponds) no engineered
  liners (with a few exceptions) most have
  engineered covers (growth media vs. impermeable
  membrane)

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2002 IDEQ Location Analysis

• Used 1998 GIS database
• Focused on upper basin
• Conducted screening site visits
• Collected information on potential capacity,
  proximity to remedial action and residences, site
  access, surface water, and existing conditions
• Assigned a good, average, or poor rating to each
  of 7 attributes
• Property ownership was not considered

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Big Creek Repository Update

• 2002 Supported yard remediation program (prior
  to ROD)
• 2002/2003 Site investigation/engineering
  evaluation
• 2003 Supported yard remediation program
• 2003 Ownership transferred to IDEQ
• Design is being completed (overall capacity and
  closure requirements)
• Drafting technical memorandum to document
  compliance with ROD requirements

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EPA/IDEQ 2004 Gameplan

• EPA funding IDEQ to lead repository efforts
• 2004 Scope
• Identify and complete preliminary design for
  repository (greater than 25,000 cy) to support
  ongoing cleanup and ICP
• Operate Big Creek repository

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Agenda

• Review of Repository Language in Basin Workplans
• Background and Current Status
• 1995 repository guidelines
• 1998 location analysis
• 2002 ROD language
• Summary of Basin Box repositories
• 2002 IDEQ location analysis
• Big Creek update
• EPA/IDEQ 2004 gameplan
• Path Forward

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Path Forward
Meeting Goal Build a Project Focus Team to
participate in identifying and evaluating viable
repository sites and assist in completing a
preliminary design for one repository in
2004. Proposal Constructive and collaborative
site identification and evaluation process (see
flowchart)