Estimating constituent release from FGD gypsum under different management scenarios

► The LEAF methodology used to understand the leaching behavior of FGD gypsum. ► LEAF release from FGD gypsum was lower than TCLP and SPLP. ► Release from FGD gypsum in fill applications decreased with decreasing infiltration. ► Release from FGD gypsum in fill applications decreased with increasing fill depth. ► Release decreased in percolation scenarios due to saturation of pore fluid.