Environmental protection investigations and corrections series: Distribution of VOCs (volatile organic compounds) in round water in the southeast area of LLNL and vicinity
Lawrence Livermore National Laboratory (LLNL) drilled 22 soil borings and 25 monitor wells to investigate the distribution of volatile organic compounds (VOCs) in ground water in the southeast area of LLNL and vicinity. Samples of saturated and unsaturated soil and ground water were collected and analyzed for VOCs. We have used these geologic and chemical data to define the vertical and horizontal distribution of VOCs in ground water. Ground water flow and VOC migration appear to be generally southward in the study area and are integrally related to the subsurface geology. The relatively shallow depth of the low-permeability, low piezometric head, lower member of the Livermore Formation in the study area has induced a significant downward gradient, apparently causing ground water and VOCs to migrate southward in permeable sediments near the contact between the upper and lower members of the Livermore Formation. Trichloroethylene (TCE), tetrachloroethylene (PCE), 1,1-dichloroethylene (1,1-DCE), and carbon tetrachloride (CCl/sub 4/) have been detected in ground water in the study area in concentrations exceeding action levels recommended by the California Department of Health Services (DOHS). TCE is the predominant VOC in the study area. Ground water chemistry and site history data indicate that there are three main sources of VOCs in ground water in the study area and vicinity. A suspected VOC source just south of Building 518 is characterized by TCE with low concentrations of 1,1-DCE, PCE, and CCl/sub 4/. A second VOC source in the Building 612 yard/Building 514 area is characterized by higher concentrations of 1,1-DCE and CCl/sub 4/ relative to TCE. A third source in the Taxi Strip/Old Salvage Yard area north of the study area is characterized by TCE with or without very low concentrations of CCl/sub 4/.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7025768
- Report Number(s):
- UCID-20917; ON: DE87003595
- Resource Relation:
- Other Information: Portions of this document 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
CHLORINATED ALIPHATIC HYDROCARBONS
ENVIRONMENTAL TRANSPORT
LAWRENCE LIVERMORE LABORATORY
WATER POLLUTION
GROUND WATER
POLLUTION SOURCES
VOLATILE MATTER
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
MASS TRANSFER
MATTER
NATIONAL ORGANIZATIONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WATER
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)