Other studies have demonstrated that trace elements are low enough in sands from iron,steel,and aluminum foundries to allow their beneficial use. because data were not available on polychlorinated dibenzo-p-dioxins,polychlorinated dibenzofurans, and polychlorinated biphenyls in SFSs, we analyzed representative spent sands from 10 foundries to assess the potential for these compounds to limit their use in soli-related applications. The total TEQ (toxicity equivalent) concentrations ranged from 0.01 to 3.13 ng TEQ kg-1 , with an average concentration of 0.58 ng TEQ kg-1. These concentrations are within the range of natural background in solis.