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Research Institute Feasibility Study

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Research Institute Feasibility Study Powered By Docstoc
					Colorado School of Mines
Research Institute Site
   DRAFT REMEDIAL
   INVESTIGATION/FEASIBILITY
   STUDY AND PROPOSED PLAN
Meeting Agenda

    Introductions (6:30-6:35)
    Site Background (6:35-6:40)
    Review of Site Remedial Investigation
     and Feasibility Study (6:40-6:50)
    Remedial Alternatives and Preferred
     Alternative (6:50-7:05)
    Public Comment (7:05-7:55)
    Meeting Closure (7:55-8:00)
Presentation and Comments

  Meeting Transcript/Record
  Formal Comment Follow Presentation
      Written Comment – Forms Available
      Oral Comment – Please Note on Sign-In
       Sheet
Site Background

  Research Complex On Site 1912-1987
  Mining and Minerals Industry
   Investigations
  Settling Pond Between Buildings and
   Creek for Wastewater
  17 Research Buildings
  CSMRI Ceased Operations at Site in
   1987
Environmental Impacts

  Drums
  Tailings Ponds
  Industrial Sewer System
  Buildings/Building Components
  Soils
  Sample Storage Areas
Environmental Activities

  1992 Water Main Break
  EPA Response
      Pond Excavation
      Soil Stockpile

      Building Drain Decontamination

      Selected Building Demolition

      Drums and Gas Cylinder Disposal
Environmental Activities

  Soil Stockpile Evaluation and Disposal
  Additional Drum Removal
  Building Evaluation and Demolition
  Additional Subsurface Investigation
        Concrete and Asphalt Evaluation and
         Disposal
Remedial Investigation
    Work Plans
        Characterization Survey Work Plan
        Site Safety and Health Plan
        Sampling and Analysis Plan
        Quality Assurance Plan
        Background Evaluation
  National Oil and Hazardous Substances
   Pollution Contingency Plan (NCP)
  Multi-Agency Radiation Surveys and Site
   Investigation Manual (MARSSIM)
Remedial Investigation
    Surface Soils
      Gamma Survey
      Surface Features Survey

      Topographic Survey

      Sampling and Laboratory Analysis

    Sub-Surface Soils
      Test Pits
      Soil Borings
Investigation Results

  Areas with Elevated Metals
   Concentrations (Cadmium, Lead,
   Mercury, Arsenic)
  Some Areas With Elevated Gamma
   Activity (Radium, Thorium, Uranium)
Investigation Results

  Upper Foot of Soils Most Affected
  Limited Deeper Areas Near Former
   Buildings Also Affected
  Groundwater Sampling (Four Quarters –
   Six Wells)
      Two Wells – Uranium Temporarily Above
       Drinking Water Limit
      One Well – TCE Temporarily Above
       Drinking Water Limit
Site Risks/Hazards

    Site As-Is
      Lifetime Risk for Onsite Full-Time Resident
       Between Four per 1000 and Eight per
       10,000
      Minimal Risks to Neighbors

      Some Long-Term Risk to Environment
            Metals and Radionuclides to Groundwater
Remedial Action Objectives

  Eliminate Human Exposure Pathways
  Develop Soil Cleanup Levels to Limit
   Exposures
  Minimize Radon Gas Risk
  Minimize Possible Lead Exposures to
   Children
  Prevent Off-Site Migration of Materials
Remedial Action Objectives

  Limit Ground Water and Surface Water
   Concentrations to Safe Drinking Water
   Act Standards
  Reduce Radiation Exposures to Levels
   As Low As Reasonably Achievable
   (ALARA)
  Comply With Applicable or Relevant and
   Appropriate Requirements (ARARs)
Remedial Alternatives – One

    NO FURTHER ACTION
      Institutional Controls
      Relocate Water Main

      Maintain Security Fencing/Signage

      Erosion Control

      Prohibition of Construction/Use

      Monitoring
Remedial Alternatives - Two

    Engineered Cap – Entire Site
      Clay Cap Prevents Surface
       Release/Exposure
      Prevents Surface Water Infiltration

      Alternative Slurry Wall Prevents Ground
       Water Infiltration
      Long-Term Institutional Controls

      Monitoring
Remedial Alternatives - Three

    Engineered Cap w Partial Removal
      Soils Over Elevated Radium, Thorium,
       Uranium Removed From Site
      Alternatives Remove to 15 pCi/g or 5 pCi/g

      Remaining Materials Consolidated and
       Capped
      Long-Term Institutional Controls

      Long-Term Monitoring
Remedial Alternatives - Four

    On-Site Solidification With Cap/Cell
      Consolidation of Affected Soils
      Solidification With Concrete and Fly Ash

      Alternative Includes Engineered Disposal
       Cell
      0.9 Acre Cap/Cell

      Long-Term Institutional Controls

      Long-Term Monitoring
Remedial Alternatives - Five

    Off-Site Disposal
      Excavation and Removal of All Affected
       Material
      Local Solid Waste Landfill

      Specialized Landfill Alternate for
       Radium/Thorium/Uranium Affected Soils
      Unrestricted Future Use
Evaluation of Alternatives

  Protection of Human Health and
   Environment
  Compliance With Applicable or Relevant
   and Appropriate Requirements (ARARs)
  Long-Term Effectiveness and
   Permanence
  Reduction of Toxicity, Mobility, or
   Volume Through Treatment
Evaluation of Alternatives

  Short-Term Effectiveness
  Implementability
  Cost
  State Acceptance
  Community Acceptance
Preferred Alternative

    Excavation and Off-Site Disposal
     (Alternative Five)
      Substantial Long-Term Risk Reduction
      Removal of Source Material Returns
       Ground Water to Background Values
      Reasonable Timeframe

      Cost Advantages

      Complies With ARARs
Community Involvement

    Web Site
        http://www.is.mines.edu/ehs/csmri/csmri.htm
        Document Repositories
           CSM Arthur Lakes Library

           Golden Public Library

           CSM Environmental Health & Safety
            Department
COMMENTS ON DRAFT RI/FS

    Comments Due February 20, 2004
      lhavelic@mines.edu
      Comment Form

      US Mail – Attn: Linn Havelick, CSM, 1500
       Illinois Street, Golden, CO 80401
    Oral Comments
        Recorded

				
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