This regulation establishes an exemption from the requirement of a tolerance for residues of butanedioic acid, 2-sulfo-, C-C9-11- isoalkyl esters, C10-rich, disodium salts (CAS Reg. No. 815583-91-6) when used as an inert ingredient (surfactant) in pesticides applied to growing crops and raw agricultural commodities after harvest under 40 CFR 180.910 limited to maximum concentration of 10% by weight in pesticide formulations. Keller and Heckman LLP on behalf of Cytec Industries, Inc. submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting establishment of an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of butanedioic acid, 2-sulfo-, C-C9-11-isoalkyl esters, C10- rich, disodium salts.