Vadose zone investigations at the Lawrence Livermore National Laboratory Superfund Site: An overview
- Weiss Associates, Emeryville, CA (United States)
- Lawrence Livermore National Lab., CA (United States)
Lawrence Livermore National Laboratory (LLNL)is investigating the fate and transport of vadose zone contaminants at their Livermore site in Livermore, California. The principal objectives of this work are to identify potential source areas at the Livermore site which require remediation, to prioritize those areas, and finally, to optimize the remediation process. Primary contaminants of interest for this investigation are volatile organic compounds (VOCs) and tritium. A fully integrated, three-part program, consisting of quantitative modeling, field studies, and laboratory measurements, is in progress. To evaluate and predict vadose zone contaminant migration, quantitative modeling is used. Our modeling capabilities are being enhanced through the development of a multicomponent,three-dimensional,nonaqueous phase liquid-liquid-vapor,nonisothermal flow and transport computer code. This code will be also used to evaluate vadose zone remediation requirements. Field studies to acquire LLNL site-specific soil (sediment) characteristics for computer code calibration and validation include subsurf ace lithologic and contaminant profiling, in situ soil moisture content, ground surface emission flux of VOCs and tritium, transpiration of tritium, and ground surface evapotranspiration of water. Multilevel vadose zone monitoring devices are used to monitor the gaseous and aqueous transport of contaminants.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10149869
- Report Number(s):
- UCRL-JC--110606; CONF-930585--3; ON: DE93010518
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540220
540230
540250
CHEMICALS MONITORING AND TRANSPORT
CHLORINATED ALIPHATIC HYDROCARBONS
COMPUTER CODES
CONTAMINATION
DENSITY
DRINKING WATER
ENVIRONMENTAL TRANSPORT
GROUND WATER
HEAT TRANSFER
HYDRAULIC CONDUCTIVITY
LAWRENCE LIVERMORE LABORATORY
MASS TRANSFER
MOISTURE
ORGANIC COMPOUNDS
POROSITY
RADIOACTIVE MATERIALS MONITORING AND TRANSPORT
RADIONUCLIDE MIGRATION
REMEDIAL ACTION
SITE RESOURCE AND USE STUDIES
SOILS
TRITIUM
US SUPERFUND
VOLATILE MATTER