This regulation establishes tolerances for residues of halosulfuron-methyl in or on the commodities alfalfa, forage at 1.0 parts per million (ppm) and alfalfa, hay at 2.0 ppm. Gowan Company requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA). The Agency is also correcting the tolerance expression for 40 CFR 180.479(a)(1) with this regulation. The tolerance expression is being corrected because the metabolites were inadvertently deleted from the most recent edition of 40 CFR 180.479.