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April 17, 2012 Long-term Stewardship (LTS) Caroline Byrd Program Coordinator

Sandia National Laboratories. April 17, 2012 Long-term Stewardship (LTS) Caroline Byrd Program Coordinator.

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April 17, 2012 Long-term Stewardship (LTS) Caroline Byrd Program Coordinator

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  1. Sandia National Laboratories April 17, 2012 Long-term Stewardship (LTS) Caroline Byrd Program Coordinator Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.

  2. Long-term Stewardship Program LTS Program Mission: To protect human health /environment from hazards associated with residual contamination at former Environmental Restoration Project sites

  3. LTS Environmental Monitoring The LTS Program conducts monitoring required by the New Mexico Environment Department (NMED) and Department of Energy (DOE). The LTS Program conducts monitoring required by the New Mexico Environment Department (NMED) and Department of Energy (DOE).

  4. Why Long Term Stewardship? Legacy sites cleaned up to risk-based levels Most sites cleaned to levels suitable for residential use Some sites have residuals present Monitoring assures environmental protection

  5. LTS FY 2012 Mid-year GW Monitoring Status • Groundwater sampling – • 2012 sampling completed on schedule first 2 quarters • Wells sampled at various intervals, for multiple constituents • Annual Groundwater Monitoring Report for 2011 in process

  6. View of Technical Area V Groundwater Site

  7. View of Tijeras Arroyo Groundwater Site

  8. View of Burn Site Groundwater Site

  9. LTS Requirements at the CWL under the Post Closure Care Permit • -Semi-annual groundwater monitoring at 6 wells • (TCE, Chromium, Nickel; plus 5 other volatile organic compounds annually) • Annual soil-gas monitoring at 5 multi-port monitoring wells • (21 sample ports, for 50 volatile organic compounds) • -Landfill Cover and Site Inspection, Maintenance, and Repair • Annual Reporting of all monitoring results • statistical analysis requirements • quarterly inspection/maintenance/repair activities

  10. CWL Monitoring Well Locations

  11. CWL Engineered Evapotranspirative Cover • -Cover engineered to prevent moisture percolating into former disposal area • -Layers constructed for stability • Native vegetation is maintained by weeding and provides erosion control & transpiration • Cover surface and vegetation are inspected quarterly; repairs are performed as needed CWL was excavated 9/98 through 2/02 as part of Landfill Excavation Voluntary Corrective Measure

  12. LTS FY 2012 CWL Status • -CWL monitoring ongoing • in compliance with Post Closure Care Permit • All post-closure care activities • are on schedule • CWL Annual Report for CY 2011 completed and sent to NMED on schedule (March 2012) • Nov. 2011 Permit Modification approved by NMED in Feb. 2012 • All changes minor and approved as Class 1 modifications

  13. LTS FY 2012 CAMU Status • Leachate from monitoring system pumped weekly • All 1st and 2nd quarter sampling completed on schedule • CAMU Annual Vadose Zone Monitoring System Annual Monitoring Results Report in progress

  14. Important Links • UNM Zimmerman Library Lobo Vault SNL/NM collection – http://repository.unm.edu/handle/1928/10963 • NMED SNL/NM information - http://www.nmenv.state.nm.us/HWB/snlperm.html

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