This regulation establishes a tolerance for the combined residues of imidacloprid, and its metabolites containing the 6- chloropyridinyl moiety, all expressed as the parent in or on blueberry. Interregional Research Project Number 4 (IR-4) requested this tolerance under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA).