The soil of at least seven west Eugene homes is contaminated with toxic chemicals state regulators believe originated with the activities of one of their industrial neighbors. The Oregon Department of Environmental Quality announced Thursday soil samples in west Eugene show high levels of dioxins, a class of toxic compounds generated during some industrial processes. DEQ believes operations at the wood treatment company J.H. Baxter & Co., a longtime source of pollution, are responsible for the contamination. DEQ has discovered dioxins in soil samples from around the J.H. Baxter & Co. facility on Roosevelt Boulevard before, but the latest sample results are the first evidence of those chemicals at nearby residences. Six of the homes require cleanup and soil replacement. DEQ will be working with J.H. Baxter on a cleanup plan for those properties, according to DEQ spokesman Dylan Darling.