This regulation establishes tolerances for combined residues of avermectin B<INF>1</INF> and its delta-8,9-isomer in or on stone fruit crop group 12, tree nut crop group 14, pistachio, tuberous and corm vegetable crop subgroup 01C, goat fat, hog fat, horse fat, sheep fat, cattle fat, and cattle meat byproducts. Existing tolerances for cattle, fat and cattle, meat byproducts are revised. Existing individual crop tolerances on almond, plum, potato, and walnut are deleted and replaced by the establishment of new crop group tolerances. Existing tolerances on almond, hulls and plum, prune, dried are retained. This regulation also makes a technical correction to correctly express the existing tolerances for mint (replace term "mint" with the more specific terms "peppermint, tops" and "spearmint, tops"). Syngenta Crop Protection, Inc. and Y-TEX Corporation requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).