This regulation establishes a time-limited tolerance for residues of sethoxydim and its metabolites containing the 2-cyclohexen- 1-one moiety in or on horseradish. This action is in response to EPA's granting of an emergency exemption under section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act authorizing use of the pesticide on horseradish in Illinois. This regulation establishes a maximum permissible level for residues of sethoxydim in this food commodity pursuant to section 408(l)(6) of the Federal Food, Drug, and Cosmetic Act, as amended by the Food Quality Protection Act of 1996. The tolerance will expire and is revoked on September 30, 1998.