This regulation establishes an exemption from the requirement of a tolerance for residues of guar hydroxypropyltrimethylammonium chloride (CAS Reg. No. 71329-50-5) when used as an inert ingredient (thickener/drift reduction agent) in pesticide formulations applied to growing crops. SciReg. Inc., on behalf of Rhodia 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 guar hydroxypropyl trimethylammonium chloride.