This regulation establishes tolerances for combined residues of fipronil (5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4- [(1R,S)-(trifluoromethyl)sulfinyl]-1H-pyrazole-3-carbonitrile) and its metabolites MB 46136 (5-amino-1-[2,6-dichloro-4- (trifluoromethyl)phenyl]4-[(trifloumethyl) sulfonyl]-1H-pyrazole-3- carbonitrile) and MB 45950 (5-amino-1-[2,6-dichloro-4-(trifluoromethyl) phenyl]-4-[(trifluoromethyl)thio]-1H-pyrazole-3-carbonitrile) in or on field corn grain, stover, and forage; milk fat, (reflecting residues in whole milk); eggs; poultry fat, meat, and meat byproducts; hog fat, meat, meat byproducts, and liver; and liver, fat, meat, and meat byproducts of cattle, goat, horse, and sheep. In petition number 5F4426 Rhone Poulenc AG, Inc. requested this tolerance under the Federal Food, Drug and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1966 (Pub. L. 104-170).