Evaluation of the total Cr-levels in the ambient air in Belgium

Combining marginal and spatial outliers identification to optimize the mapping of the regional geochemical baseline concentration of soil heavy metals

“…Due to the obligation to analyse Cr in every soil sample, even if no pollution by heavy metals is expected, this database contains both Cr concentrations below and above the geochemical baseline. In Belgium, emissions of Cr from ferrous industries were documented by Thiessen et al (1988).…”