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Soil gas transport above a jet fuel/solvent spill at Plattsburgh Air Force Base

TitleSoil gas transport above a jet fuel/solvent spill at Plattsburgh Air Force Base
Publication TypeJournal Article
Year of Publication2000
AuthorsHinlein ES, Ostendorf DW, Lutenegger AJ, Kelley SP
JournalWater Resources Research
Volume36
Issue9
Start Page2531
Pagination2531–2547
Date Published09/2000
Abstract

We calibrate a stoichiometrically coupled soil gas diffusion model with spatially resolved observations of oxygen, carbon dioxide, total hydrocarbon, and trichloroethylene vapor concentrations in the unsaturated zone above a weathered jet fuel/solvent spill at Plattsburgh Air Force Base in upstate New York. The calibration suggests that aerobic microorganisms in the capillary fringe degrade jet fuel vapor at a steady rate of 9.5 μg hydrocarbons (m−2 s−1). The solvent does not degrade in the fringe, however, and the model and data estimate a steady evaporation rate of 1.2×10−2 μg TCE (m−2 s−1). Barometric pumping slightly alters the steady concentration profile at Plattsburgh, although the transient advective flux is the same order of magnitude as the steady diffusive flux. We derive a simple perturbation theory for the second-order transient concentration corrections and include it in the calibration. The perturbation theory is valid at Plattsburgh because the soil is uniform and permeable with a relatively deep capillary fringe

DOI10.1029/2000WR900128