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- Manufacture of coke oven products [This class includes the operation of coke ovens chiefly for the production of coke or semi -coke from hard coal and lignite, retort carbon and residual products such as coal tar or pitch. Agglomeration of coke. Distillation of coal tar is classified in class 2411.] (24)
- Manufacture of refined petroleum products (12)
- Processing of nuclear fuel [includes extraction of uranium metal from pitchblende or other uranium bearing ores; manufacture of alloys, dispersions or mixtures of natural uranium or its compounds; manufacture of enriched uranium and its compounds; plutonium and its compounds; uranium depleted in U 235 and its compounds; other radioactive elements, isotopes or compounds; and, nonirradiated fuel elements for use in nuclear reactors] (1)