This regulation establishes tolerances for combined residues of the herbicide pendimethalin, [N-(1-ethylpropyl)-3,4-dimethyl-2,6- dinitrobenzenamine], and its metabolite, 4-[(1-ethylpropyl) amino]-2- methyl-3,5-dinitrobenzyl alcohol, in or on crayfish at 0.05 parts per million (ppm), and cotton gin byproducts at 3.0 ppm. BASF Corporation requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).