Abstract
Risk assessment studies for PAH-mobility at contaminated sites need to take into account the spatial variability of PAH sources and sinks as they control the release and redistribution of PAH. This study focuses on the delineation of characteristic soil profiles and their expanse at a former manufactured gas production site (Testfeld Sud) based on a screening of solid phase PAH-concentrations and soil physical and chemical properties. The contamination of the unsaturated zone is governed by medium molecular weight PAH. This strongly contrasts the findings for the aquifer and soils under sealed surfaces. For the unsaturated zone, PAH-patterns are constant, regardless of vertical position or solid phase concentration. However, total PAH-concentrations and soil properties vary over a wide range. This was successfully modelled by stochastic simulations on the basis of Markov Chain theory. For each individual soil profile the corresponding probabilities are given. Thereby, the contribution of PAH released from individual soil profiles to the overall output may be estimated by the use of one-dimensional physically-based transport models.
Translated title of the contribution | Heteorogeneity of the ground properties and contamination of a gas works |
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Original language | German |
Pages (from-to) | 175-182 |
Number of pages | 8 |
Journal | Grundwasser |
Volume | 3 |
Issue number | 4 |
DOIs | |
State | Published - 1998 |