CLYDE, Ohio (AP) — Soil samples showing high levels of a chemical believed to increase the risk of certain cancers were found at a former park in an area of northern Ohio where cancer has sickened dozens of children for more than a decade, according to environmental regulators.

The U.S. Environmental Protection Agency report on the findings, though, doesn’t link the contaminants with the cancer cluster that has been under investigation by state and federal agencies for more than six years. Nearly 40 young people have been diagnosed with cancer since the mid-1990s in the area.