An article about a community group contesting the radiation levels in an industrial landfill in Canton, mentions that a Wayne State geology professor supported the groups\' contention about the radiation. Wayne State University geologist Mark Baskaran and Northern Arizona University chemist Michael E. Ketterer shared their views in a letter to the EPA on May 4. "There appear to be numerous ground-water samples that contain plutonium activities in large excess of what can reasonably be considered background," they wrote. According to the two, the levels were many times higher than what is usually measured as background radiation.\"