Ground-water quality and movement at Lawrence Livermore National Laboratory
This report is an extension of earlier work in evaluation of the potential for contamination of the saturated ground-water system at Lawrence Livermore National Laboratory (LLNL). The objectives were to complete the sampling and analysis of water from observation wells at LLNL and to estimate the shallow areal ground-water flow speed for various portions of the LLNL site. Sampling and analysis of water from 13 observation wells at LLNL was completed. A series of field and laboratory hydraulic aquifer tests provided estimates of the hydraulic conductivity and effective porosity of the alluvial aquifer beneath LLNL. These estimates were the basis for calculating ground-water flow speeds beneath LLNL. All water samples tested contained tritium well below the limit for drinking water. The water from a well in the northeastern part of the site had about two times the nitrate concentration allowed in drinking water. Two wells contained trichloroethylene (TCE) in concentrations above the suggested drinking water limit. Two wells produced water with tetrachloroethylene (PCE) concentrations above the suggested drinking water limit. Water from four wells contained detectable concentrations of chloroform. Ground-water flow speeds in shallow alluvium at LLNL were estimated to be between 1 and 42 m/y. PCE-contaminated ground water may move offsite in 10 months to 3 years from a contaminated well in the southwest part of the site, if it has not already done so. Elsewhere, chlorinated hydrocarbons in ground water will likely take 11 to 550 years to move offsite.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5022825
- Report Number(s):
- UCRL-53474; ON: DE84008869
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GROUND WATER
RADIONUCLIDE MIGRATION
WATER QUALITY
AQUIFERS
CHLORINATED ALIPHATIC HYDROCARBONS
EXPERIMENTAL DATA
LAWRENCE LIVERMORE LABORATORY
NITRATES
TRITIUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DATA
ENVIRONMENTAL QUALITY
ENVIRONMENTAL TRANSPORT
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MASS TRANSFER
NATIONAL ORGANIZATIONS
NITROGEN COMPOUNDS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
RADIOISOTOPES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WATER
YEARS LIVING RADIOISOTOPES
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)
520300 - Environment
Aquatic- Radioactive Materials Monitoring & Transport- (1989)