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Coeur d’Alene Basin TLG Repository PFT meeting

Coeur d’Alene Basin TLG Repository PFT meeting. December 9, 2003. 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. Agenda.

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Coeur d’Alene Basin TLG Repository PFT meeting

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  1. Coeur d’Alene Basin TLGRepository PFT meeting December 9, 2003

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

  3. 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

  4. 2003 Basin Workplan • Big Creek Repository will support residential yard remediation • Additional repository capacity deferred to Five-Year Basin workplan

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

  6. 2004 Basin Workplan • Operate and construct improvements to Big Creek Repository • Site and design additional repositories (which will also support the ICP)

  7. 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

  8. Coeur d’Alene 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

  9. 1998 Basin Repository Analysis • Performed by Coeur d’Alene 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

  10. What did the ROD say about repositories? • No specific locations identified • Described 4-step process: • Site identification • Technical evaluation • Public input/notification • Decision documentation

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

  12. Additional considerations • Transportation impacts and costs • Economic development or future reuse of the site where feasible • Geotechnical stability • Availability of clean cover material • Community acceptance

  13. 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)

  14. 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

  15. 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

  16. 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

  17. 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

  18. Path Forward • Meeting Goal: Build a Project Focus Team to participate in identifyingand 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)

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