Remediation roundup

The Laboratory currently has four treatment systems operating 24 hours a day to clean up soil and groundwater on the site. Beginning in this issue, we will include an update on the total amounts of groundwater treated by each system and the amount of contaminants removed from the sole-source aquifer.

• Removal Action V Pump-and-Treat System (operating since 12/96):
  • 440,000,000 gallons of groundwater treated by air stripper and recharged
  • 135 pounds of volatile organic compounds (VOCs) removed from the aquifer
• Operable Unit III Pump-and-Treat System (operating since 6/97):
  • 248,000,000 gallons of groundwater treated by air stripper and recharged
  • 450 pounds of VOCs removed from the aquifer
• Tritium Remediation System (operating since 5/97)
  • 63,000,000 gallons of water treated by carbon filters (to remove VOCs) and recharged
  • Further southward movement of High Flux Beam Reactor tritium plume curtailed
• Operable Unit IV Air Sparging/Soil Vapor Extraction System (operating since 11/97)
  • 1,300,000,000 cubic feet of air treated to remove remnants of 1977 oil spill from area soil and groundwater
  • 12 pounds of contaminants removed from the soils and aquifer

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