Slide 1: Tallevast Community Meeting
Tallevast Community Meeting Lockheed Martin Corporation March 3, 2010
Slide 2: Agenda
Agenda Background • Process for defining the problem • What was found • What has been done Proposed Plan • Planning process • What is proposed • How long will it take 2
Slide 3: Background
Background 3
Slide 4: Process for Defining the Problem
Process for Defining the Problem Determine chemicals that could have been released • Comprehensive examination of Plant records to identify chemicals used Determine what was impacted • Test soil, groundwater, surface water, sediment, and soil gas Determine exposure pathways Determine migration pathw
Slide 5: Process for defining the problem (cont.)
Process for defining the problem (cont.) Samples collected for laboratory analysis: • Collected hundreds of soil samples from the facility and the community • Collected hundreds of groundwater samples from wells on the facility and in the community • Sediment samples • Surface water samples • Soil g
Slide 6: What Was Found
What Was Found Soil • Petroleum related and volatile chlorinated compounds in former sump area at plant -Arsenic -Beryllium -Copper -TPH -PCE -PAHs Groundwater • 1,4-dioxane, chlorinated compounds, their breakdown products -1,4-dioxane -PCE -TCE -cis-1,2-DCE -1,1-DCE -1,1-DCA -1,1,1-TCA -Vinyl chlor
Slide 7: Depth of Groundwater Contamination
Depth of Groundwater Contamination Depth (feet) 0 100 200 300 400 7
Slide 8: Extent of Groundwater Contamination
Extent of Groundwater Contamination 8
Slide 9: What Has Been Done
What Has Been Done Removed sumps and surrounding soil Closed private wells Initiated a groundwater recovery and treatment system at the facility • Recovered millions of gallons of contaminated groundwater • Removed over a hundred pounds of contaminants • Conducted a source removal to address the spi
Slide 10: Proposed Plan
Proposed Plan 10
Slide 11: Planning Process
Planning Process • Establish clean up objectives • Compile all methods of cleaning up groundwater and soil contamination • Eliminate methods that can’t meet clean up objectives • Compare remaining methods against selection criteria to find best alternative • Tailor best alternative to address unique
Slide 12: What is Proposed: Soil on LMC Property
What is Proposed Soil on LMC Property • Institutional and Engineering Controls - Restrictive covenant - Fence - Paving/cover 12
Slide 13: What is Proposed (cont.): Groundwater
What is Proposed (cont.) Groundwater • Install extraction system in the best locations to pull contaminated water out of the ground • Build a treatment system capable of treating all chemicals of concern in groundwater • Pump and treat until the groundwater meets State Cleanup Target Levels • Conduc
Slide 14: What is Proposed (cont.): Lessons learned from interim systems
What is Proposed (cont.) Incorporates lessons learned from operating interim systems • Multiple levels of backup on system controls/alarms • Operators present 24/7 • All treatment systems in one building within secondary containment 14
Slide 15: Groundwater Extraction System
Groundwater Extraction System 15
Slide 16: Areas of Highest Concentrations
Areas of Highest Concentrations 16