This rule extends time-limited tolerances for residues of the fungicide tebuconazole in or on barley grain at 2.0 parts per million (ppm), barley hay at 20 ppm, barley straw at 20 ppm, wheat hay at 15 ppm, wheat straw at 2.0 ppm, and pistachios at 1.0 ppm; and extends time-limited tolerances for the combined residues of tebuconazole and its metabolite (HGW 2061) in milk at 0.1 ppm and meat byproducts of cattle, goats, hogs, horses, poultry and sheep at 0.2 ppm for an additional 18-month period, to December 31, 1999. This action is in response to EPA's granting of emergency exemptions under section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act authorizing use of the pesticide on barley, wheat, and pistachios. Section 408(l)(6) of the Federal Food, Drug, and Cosmetic Act (FFDCA) 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 section 18 of FIFRA.