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Status of Sandia’s Environmental Restoration Operations

Status of Sandia’s Environmental Restoration Operations. John R. Cochran Environmental Restoration Operations Project Manager Sandia National Laboratories October 20, 2010. Joe Estrada Environmental Restoration Federal Project Director DOE/NNSA Sandia Site Office.

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Status of Sandia’s Environmental Restoration Operations

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  1. Status of Sandia’s Environmental Restoration Operations John R. Cochran Environmental Restoration Operations Project Manager Sandia National Laboratories October 20, 2010 Joe Estrada Environmental Restoration Federal Project Director DOE/NNSA Sandia Site Office SAND2010-7084P Sandia National Laboratories is a multi-program laboratory operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin company, for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000". 1

  2. Overview of Sandia’s Environmental Restoration (ER) Project • Mission – Identify, Characterize and Remediate sites where hazardous & radioactive materials have been released • Scope: • 265 Environmental Restoration sites (ER sites) • 3 Groundwater Areas of Concern (GW AOCs) • Regulated by New Mexico Environment Department (NMED) 2

  3. Overview of Sandia’s ER Project • Very successful, completely closed 232 of 265 ER sites • Status of remaining 33 ER sites & 3 GW AOCs 3

  4. Order of Presentation • 33 remaining ER sites • Chemical Waste Landfill (RCRA regulated unit) • Mixed Waste Landfill (RCRA solid waste management unit (SWMU)) • 26 SWMUs in “Corrective Action Complete” regulatory process • 5 SWMUs undergoing groundwater investigations • Three GW AOCs (regulated as SWMUs) • Burn Site GW AOC • Tijeras Arroyo GW AOC • Technical Area V GW AOC 4

  5. Chemical Waste Landfill • 1.9 acre interim-status landfill operational from 1962 to 1985 • SNL completed 2 Voluntary Corrective Measures to excavate landfill and treat soil below landfill • NMED approved terms of Post-Closure Care Permit and other documents (October 2009) • Installed 4 groundwater monitoring wells (April – June 2010) • Submitted “CWL Final RCRA Closure Report” & Certification of Closure (September 2010) – documents closure conducted in accordance with Closure Plan 5

  6. Installing Monitoring Well at CWL 6

  7. Mixed Waste Landfill - Background • 2.6 acre landfill • Operational 1959 to 1988 • Received ~ 3,700 yd3 low-level radioactive & mixed waste • Groundwater monitoring since 1990 • After Public Hearing, NMED issued Final Order (2005) selecting evapotranspirative (ET) cover w/ bio-intrusion barrier as remedy, setting other requirements • Workplan for cover construction approved NMED (2008) • Cover constructed (2009) 7

  8. Mixed Waste Landfill - Status • Report documenting construction of ET cover to NMED (January 2010) • NMED requested investigation of detection of toluene in GW samples (April 2010) • DOE & Sandia submitted MWL Toluene Investigation Report (August 2010) – MWL not source of very low levels toluene • NMED requested additional information be included in Toluene Report (Sept 28th, 2010) 8

  9. Mixed Waste Landfill Cover 2009 9

  10. 31 Other SWMUs in Corrective Action Process - Background • Include former: septic systems & drain fields, surface testing and burn sites • Characterization & remediation completed 2007 • DOE & Sandia requested corrective action complete status: • 26 SWMUs (March 2006) • 5 SWMUs (January 2008) • NMED April 8, 2010 guidance letter: • 2 SWMUs – more GW characterization needed with existing wells (149,154) • 3 SWMUs - need GW characterization with new wells (8/58,68) • 25 SWMUs – NMED agrees corrective action complete (CAC) • 1 SWMU - NMED needs more information 10

  11. 31 Other SWMUs in Corrective Action Process – Current • 26 SWMUs will proceed in NMED’s public participation process • SWMUs 149 & 154 – DOE & Sandia submitted GW Sampling Plans (June 2010) • SWMUs 8/58 & 68 – DOE & Sandia submitted GW Characterization Workplans (September 2010) 11

  12. Burn Site GW AOC • GW monitored since 1996 • Detected contaminates in GW: • Nitrates: 0 to 35 ppm (standard 10 ppm) • Perchlorate: 0 to 9 ppb (no drinking standard) • Workplan to characterize soil & GW to NMED (November 2009) • NMED approved workplan (February 2010) • Installed 4 GW monitoring wells and 10 soil borings (July – August 2010) • Writing investigation report (Fall 2010) 12

  13. N 13

  14. Tijeras Arroyo GW AOCBackground & Status • GW monitored since 1992 • Detected contaminates in GW: • Nitrates: 0 to 30 ppm (standard 10 ppm) • Trichloroethylene (TCE): 0 to 7 ppb (standard 5 ppb) • AOC covers several square miles • Four potential contributors: • SNL • KAFB, and • City of Albuquerque • natural infiltration from Tijeras Arroyo • NMED approved Groundwater Investigation Report (February 2010) • NMED reviewing Corrective Measure Evaluation Report from 2005 14

  15. Boundary of Nitrate Plume in Perched, Tijeras Arroyo GW above 10 ppm 15

  16. Technical Area V GW AOC Background & Status • GW monitored since 1992 • Detected contaminates in GW: • Nitrates: 0 to 12 ppm (standard 10 ppm) • TCE: 0 to 16 ppb (standard 5 ppb) • 13 monitoring wells already installed • NMED approved installation 4 additional GW wells + 3 deep soil vapor wells (May 2010) • Installation GW wells & vapor wells to begin October, 2010 16

  17. Technical Area V N 17

  18. SummarySandia’s ER Project • Completely closed 232 of 265 ER sites • Addressing remaining 33 ER sites & 3 GW AOCs • CWL: DOE & Sandia installed 4 wells & submitted CWL Final RCRA Closure Report • MWL: NMED reviewing cover construction report, DOE & Sandia adding more information in Toluene Report • 26 Other SWMUs: with NMED public participation process DOE & Sandia RCRA permit • 5 SWMU: DOE & Sandia submitted GW characterization plans • Burn Site GW AOC: DOE & Sandia installed 4 GW wells and 10 soil borings • Tech Area V GW AOC: DOE & Sandia will install 4 GW wells and 3 deep vapor wells • Tijeras Arroyo GW AOC: awaiting NMED review of Corrective Measures Evaluation Report 18

  19. Questions & More Information • Questions? • Additional information? Visit SNL’s Long-Term Environmental Stewardship (LTES) web site: http://ltes.sandia.gov/(Legacy -> Site Information) • Additional questions? Call SNL’s Community Involvement Program at 284-5200 19

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