The Multimedia Environmental
Pollutant Assessment System (MEPAS): Atmospheric Pathway Formulations
Droppo, J.G. and J.W. Buck. 1996. The
Multimedia Environmental Pollutant Assessment System (MEPAS): Atmospheric Pathway Formulations. PNNL-11080/UC-602, 630, Pacific Northwest
National Laboratory, Richland, Washington.
Cover Page
Preface
Summary
Acknowledgements
1.0 Atmospheric Pathway
1.1 Long-term Average Exposure
1.2 Short-term Average Exposure
1.3 Atmospheric Processes
2.0 Emission Characterization
2.1 Suspension of Surface Particles
2.2 Wind Erosion and Mechanical Suspension
2.3 Vehicular Suspension of Particles
2.4 Emission Rate Computation
2.5 Volatilization
2.6 Contaminated Soil Models
2.6.1 Contaminated Soil Gradient Model
2.6.2 Contaminated Soil Gradient Model Without a Clean Soil Cover
2.6.3 Contaminated Soil Gradient Model With a Clean Soil Cover
2.7 Landfills Without Internal Gas Generation
2.8 Landfills With Internal Gas Generation
2.9 Surface Impoundments
2.10 Spill Sites
2.11 Land Treatment Facilities
2.12 Surface Impoundments With Sediment-Controlled Emissions
2.13 Mass Budget for Volatiles
2.14 Limitations
3.0 Initial Source Dispersion
3.1 Area Source
3.2 Point Source
3.3 Discussion of Area Source and Point Source
4.0 Transport, Dispersion, and Deposition
4.1 Atmospheric Pathway Model
4.2 Total Deposition
4.3 Dispersion Coefficients
4.4 Calm and Missing Wind Conditions
4.5 Radioactive Decay
4.6 Chemical Reactions
4.7 Dry Deposition
4.8 Wet Deposition
4.9 Deposition Classes
4.10 Source Mass Budget
4.11 Plume Rise
4.11.1 Unstable and Neutral Atmospheric Conditions
4.11.2 Stable Atmospheric Conditions
5.0 Air as Source
6.0 Indoor Air Concentration
7.0 Disperse Regional Impact
8.0 complex Terrain Component
8.1 Background
8.2 Plume Intersection with Topographical Features
8.3 Local Climatological Plume Channeling
8.4 Limitations
9.0 Short-Term Air Concentrations
10.0 Summary
11.0 References