A Multimedia, Multiple-Exposure Pathway Methodology for Deriving Risk-Based Standards for Tetrachloroethylene (PCE) in Soil

Conference · Mon Sep 24 04:00:00 EDT 1990

OSTI ID:5485654

Hall, L. C. ^[1]; Daniels, J. I. ^[1]; McKone, T. E. ^[1]

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1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

For contaminants of concern at hazardous-waste sites, the State of California develops exposure criteria referred to as Applied Action Levels (AALs). An AAL is the concentration of a contaminant in a source medium that, when exceeded, is expected to pose an unacceptable risk to human health. Typically, AALs are calculated separately for individual environmental media (e.g., air, water, or soil) and only for a limited number of routes of exposure. This approach fails to recognize the multimedia character of many soil contaminants, and by excluding significant exposure routes, could underestimate risk. Using tetrachloroethylene (perchloroethylene, PCE) in soil as an example, we describe an alternative methodology for driving risk-based AALs from estimates of intake that account for multimedia, multiple-pathway exposure.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE; State of California Department of Health Services
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5485654
• Report Number(s): UCRL--102867; CONF-9009293--3; ON: DE91017438
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
290300* -- Energy Planning & Policy-- Environment
Health
& Safety
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
CARCINOGENESIS
COMPUTER CODES
DATA
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL EXPOSURE
ENVIRONMENTAL EXPOSURE PATHWAY
ENVIRONMENTAL TRANSPORT
G CODES
GROUND WATER
HAZARDOUS MATERIALS
HYDROGEN COMPOUNDS
INFORMATION
MASS TRANSFER
MATERIALS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PATHOGENESIS
REPORTING REQUIREMENTS
RISK ASSESSMENT
SEDIMENTS
SOILS
SURFACE WATERS
THEORETICAL DATA
WATER