This regulation establishes tolerances for residues of simazine in or on citrus fruits (crop group 10-10), pome fruits (crop group 11-10), stone fruits (crop group 12-12), and tree nuts (crop group 14-12) and amends the tolerance for residues in or on almond hulls. Syngenta Crop Protection, LLC requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).