Figure 4From: Determination, speciation and distribution of mercury in soil in the surroundings of a former chlor-alkali plant: assessment of sequential extraction procedure and analytical techniqueSpatial distribution of the water leachable Hg. a. Leached content (mg/kg); b. Weight (%) related to total Hg extracted in aqua regia. Comparison with leaching limit values for granular waste (mg/kg): inert <0.003; non-hazardous <0.05 and hazardous > 0. 05.Back to article page