LAWRENCE LIVERMORE NATIONAL LABORATORY: SITE 300
SITE CHARACTERISTICS

Cleanup Stategy and Phases

LLNL has developed a strategy for the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) cleanup that is comprised of two phases: 1) remedial action buildout, and 2) long-term response action.

The Remedial Action Buildout phase consists of:

• Completion of characterization and finalization of cleanup standards and remedies.
  
  
• Construction and installation of engineered systems (i.e., treatment facilities).
  
  
• Completion of short-term remedial actions (i.e., soil excavation).
  
  
• Completing all regulatory-negotiated CERCLA required documentation.

The activities associated with remedial action buildout are based on the remedies selected in the Final GSA Record of Decision and the Interim Site-Wide Record of Decision. The additional task still to be performed as part of the buildout phase are shown below and include:

• Completing characterization at Building 812, Building 865, and Sandia Test Site.
  
  
• Excavating contaminated soil near Building 850 and Building 855.
  
  
• Installing additional treatment facilities.
  
  
• Expanding the extraction wellfields at the Central GSA, and at Buildings 830 and 832.
  
  
• Selecting and implementing remedy for contamination at the Pit 7 Complex.
  
  
• Completing installation of monitoring networks for Pits 2, 8, and 9.

The cleanup standards will be selected in the Final Site-Wide Record of Decision scheduled for 2007. Once buildout of the approved remedial actions is complete, the Long-Term Response Action phase will commence.

The Long-Term Response Action (Stewardship) phase consists of:

1. Operation and maintenance of remediation systems.
   
   
2. Performance/compliance monitoring and reporting.
   
   
3. Risk and hazard management.
   
   
4. Regulatory/community interactions.
   
   
5. Evaluation of progress to meet cleanup standards.
   
   
6. Achievement of cleanup standards and site closure.