The U.S. Environmental Protection Agency wants to do more soil testing at a Superfund site in northern Minnesota. The former St. Regis wood treatment plant operated on the Leech Lake Indian Reservation. For 30 years the plant, near downtown Cass Lake, polluted the soil and water with dioxin. That's a chemical that causes cancer. The EPA began cleaning up the site in 1984. Federal officials say it's still not clean. City and tribal leaders are frustrated with the speed of the clean-up. They welcome this next phase in the process. Mainstreet Radio's Tom Robertson reports... {