Author(s)

C. Rollin. H. Baroudi & F. Benslimane

Abstract

Groimdwater risk assessment for a Polycyclic Aromatic Hydrocarbons (PAH) contaminated site; benchmarking and validation of numerical transport models C. Rolling H. Baroudi'& F. Benslimane^ *Institut National de I'Environnement et des Risques Industriels, France. ^ICF Environnement, France. Abstract The objective is to test the modelling approaches and the reliability of the codes used in water risk assessment. The final goal is to elaborate, for each group of pollutant, guidelines that could serve as a scientific support for pollutant transport modelling in groundwater and soil. The models performed by 5 teams to simulate a contamination of soils and groundwaters by PAH at a disused coke plant site were compared. Hydrogeology is characterised by a superficial and a chalk aquifer, the latter being confined under a 2 meter thick clay layer. The source of contamination was determined by 40 soil sampling points. Total PAH concentrations in the soils ranged from 3 to 80000 mg/kg.

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