A risk-based cleanup criterion for PCE in soil. [Tetrachloroethylene]
The most important attribute of a chemical contaminant at a hazardous-wastes site for decision makers to consider with regard to its cleanup is the potential risk associated with human exposure. For this reason we have developed a strategy for establishing a risk-based cleanup criterion for chemicals in soil. We describe this strategy by presenting a cleanup criterion for tetrachloroethylene (PCE) in soil associated with a representative California landscape. We being by discussing the environmental fate and transport model, developed at the Lawrence Livermore National Laboratory (LLNL), that we used to predict the equilibrium concentration of PCE in five environmental media from a steady-state source in soil. Next, we explain the concept and application of pathway-exposure factors (PEFs), the hazard index, and cancer-potency factors (CPFs) for translating the predicted concentrations of PCE into estimated potential hazard or risk for hypothetically exposed individuals. Finally, the relationship between concentration and an allowable level of risk is defined and the societal and financial implications are discussed. 22 refs., 6 tabs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- Sponsoring Organization:
- STOFCA
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6040357
- Report Number(s):
- UCRL-JC-104060; CONF-9010166-7; ON: DE91007137; TRN: 91-004580
- Resource Relation:
- Conference: 6. annual Department of Energy model conference on waste management and environmental restoration, Oak Ridge, TN (USA), 29 Oct - 2 Nov 1990
- Country of Publication:
- United States
- Language:
- English
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CHLORINATED ALIPHATIC HYDROCARBONS
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL EXPOSURE PATHWAY
ENVIRONMENTAL EXPOSURE
RISK ASSESSMENT
ENVIRONMENTAL TRANSPORT
MATHEMATICAL MODELS
CALIFORNIA
CARCINOGENS
CHEMICAL WASTES
LAND POLLUTION CONTROL
LAND RECLAMATION
LAWRENCE LIVERMORE LABORATORY
THEORETICAL DATA
TOXIC MATERIALS
CONTROL
DATA
FEDERAL REGION IX
HALOGENATED ALIPHATIC HYDROCARBONS
INFORMATION
MASS TRANSFER
MATERIALS
NATIONAL ORGANIZATIONS
NORTH AMERICA
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTION CONTROL
US AEC
US DOE
US ERDA
US ORGANIZATIONS
USA
WASTES
540200* - Environment
Terrestrial- (1990-)
560300 - Chemicals Metabolism & Toxicology