Supplemental mathematical formulations: The Multimedia Environmental Pollutant Assessment System (MEPAS)
The Multimedia Environmental Pollutant Assessment System (MEPAS) is a methodology for assessing relative health impacts from the release of hazardous chemical and radioactive materials. MEPAS is an enhanced version of the Remedial Action Priority System (RAPS). This document, a supplement to the RAPS documentation, contains an overview of MEPAS followed by detailed discussions of enhancements. MEPAS provides outputs of health impact parameters for use in ranking and screening applications. Environmental contaminant concentrations are used to estimate potential health impacts based on major exposure pathways. Enhancements to the groundwater, surface water, overland, atmospheric, and exposure components are documented. These enhancements include a revision in the integration method for the waterborne pathway, a wetland component, a gaseous emission (volatilization) component, an atmospheric complex terrain component, mass budget formulations, and environmental decay of chemical constituents. Several new exposure components are described along with enhancements to the exposure pathways computations. 18 refs., 7 figs., 5 tabs.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA)
- Sponsoring Organization:
- DOE/EH
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6603627
- Report Number(s):
- PNL-7201
- Country of Publication:
- United States
- Language:
- English
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AIR
COMPUTER CODES
ENVIRONMENTAL EXPOSURE
ENVIRONMENTAL EXPOSURE PATHWAY
ENVIRONMENTAL TRANSPORT
EVALUATION
FLUIDS
GASES
GROUND WATER
HAZARDOUS MATERIALS
HAZARDS
HEALTH HAZARDS
HYDROGEN COMPOUNDS
M CODES
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
POLLUTANTS
RADIOACTIVE MATERIALS
SOILS
SURFACE WATERS
WATER