K-65 residues are the very radioactive mill residues resulting from a uniquely concentrated uranium ore discovered before WW II in Katanga province (Shinkolobwe) of the Democratic Republic of the Congo (formerly called the Belgian Congo).
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The Linde "K-65 residues" were transported to a storage silo built at the federally appropriated Lake Ontario Ordnance Works site outside of Lewiston, NY, a short distance from Niagara Falls, NY.