Transcript How Do You Measure Cost Efficiencies in Remediation

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.
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Agenda
1. Review of Repository Language in Basin Workplans
2. 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
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3. Path Forward
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
1. Review of Repository Language in Basin Workplans
2. 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
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3. Path Forward
Coeur d’Alene Basin Restoration Project:
Guidelines for Mine Tailings Repositories
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Developed in 1995
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Collaborative effort
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Non-regulatory guidelines
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Still appropriate and relevant to guide
repository scoping and development
process
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Addresses: Location, Design, Construction,
and Management
1998 Basin Repository Analysis
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Performed by Coeur d’Alene Tribe with
input from multiple stakeholders
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Used Geographic Information System
technology to investigate potential locations
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Produced maps, GIS database, and list of
169 potential sites
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Served as foundation for 2002 IDEQ study
What did the ROD say about repositories?
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No specific locations identified
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Described 4-step process:
1. Site identification
2. Technical evaluation
3. Public input/notification
4. 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
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Ongoing effort
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Have evaluated 5 Box and 4 Basin
repositories
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No standard for location, size, or design
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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)
2002 IDEQ Location Analysis
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Used 1998 GIS database
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Focused on upper basin
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Conducted screening site visits
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Collected information on potential capacity,
proximity to remedial action and residences, site
access, surface water, and existing conditions
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Assigned a good, average, or poor rating to each
of 7 attributes
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Property ownership was not considered
Big Creek Repository Update
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2002 – Supported yard remediation program (prior
to ROD)
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2002/2003 – Site investigation/engineering
evaluation
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2003 – Supported yard remediation program
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2003 – Ownership transferred to IDEQ
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Design is being completed (overall capacity and
closure requirements)
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Drafting technical memorandum to document
compliance with ROD requirements
EPA/IDEQ 2004 Gameplan
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EPA funding IDEQ to lead repository efforts
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2004 Scope:
1. Identify and complete preliminary design for
repository (greater than 25,000 cy) to support
ongoing cleanup and ICP
2. Operate Big Creek repository
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Agenda
1. Review of Repository Language in Basin Workplans
2. 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
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3. Path Forward
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)
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