EPA is revoking certain tolerances for the herbicides metolachlor and sethoxydim and the insecticides chlorpyrifos, dimethoate, fenamiphos, terbufos, and tetrachlorvinphos. Also, EPA is modifying certain tolerances for the herbicides 2,4-D, DCPA, desmedipham, metolachlor, sethoxydim, and triallate and the insecticides chlorpyrifos, dimethoate, fenamiphos, phorate, and tetrachlorvinphos. In addition, EPA is establishing new tolerances for the herbicides bensulide, metolachlor, and sethoxydim and the insecticide chlorpyrifos. The regulatory actions finalized in this document are in follow-up to the Agency's reregistration program under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), and tolerance reassessment program under the Federal Food, Drug, and Cosmetic Act (FFDCA), section 408(q).