This document establishes a time-limited tolerance for residues of the insecticide chlorpyrifos [O,O-diethyl O-(3,5,6- trichloro-2-pyridyl) phosphorothioate] in or on the raw agricultural commodities oats and barley when blended together in a mixture containing not more than 97% oats and not less than 3% barley. General Mills requested this regulation to establish the maximum permissible level for residues of the insecticide in or on the commodities.