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a specified mineral processing activity that is performed at a mine site or well site;
a specified mineral processing activity that is performed at a mine site or well site;
a mineral processing activity, including crushing, grinding, milling, separation, sieving, screening, froth floatation, leaching, recrystallization, precipitation, drying, evaporation, heating, calcinating, roasting, smelting, casting of ingots, refining, purification, distillation, electrodeposition and surface roughening of electrodeposited foil, that