Thirty-four military bases shut down since 1988 are on the Environmental Protection Agency's Superfund list of worst toxic waste sites -- most of them for at least 15 years -- and not one is completely cleaned up. As the latest base-closing commission begins its work, an examination by The Associated Press shows EPA is concerned with incomplete pollution cleanups at more than 100 Defense Department facilities. Other military-related cleanups are being led solely by states. EPA lists 10 sites with problems such as groundwater contamination not yet fully under control. Five are in California; the others are in Arizona, Florida, Tennessee and Oregon.