This regulation 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 combined residues of tebuconazole and its metabolite in milk at 0.1 ppm and in meat byproducts of cattle, goats, hogs, horses, poultry and sheep at 0.2 ppm for an additional 1- year period. These tolerances will expire and are revoked on December 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 authorizing use of the pesticide on barley, wheat and pistachios. 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 section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act.