This regulation extends time-limited tolerances for the combined residues of the herbicide pendimethalin and its metabolites in or on fresh mint hay and mint oil at 0.1 and 5.0 parts per million (ppm), respectively, for an additional 1-year period. These tolerances will expire and are revoked on May 31, 2000. This action is in response to EPA's granting of emergency exemptions under section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) authorizing use of the pesticide on mint. Section 408(l)(6) of the Federal Food, Drug, and Cosmetic Act requires EPA to establish a time-limited tolerance or exemption from the requirement for a tolerance for pesticide chemical residues in food that will result from the use of a pesticide under an emergency exemption granted by EPA under FIFRA section 18.