According to a report by the Boston Chemical Data Corporation, an elementary school in the suburbs of St. Louis had "unacceptable" levels of radioactiveContamination.

The Manhattan Project, the United States' efforts to develop nuclear weapons during World War II, caused the contamination.

Coldwater Creek has been known to be contaminated by nuclear waste.

Marco Kaltofen told CNN that the waste in the creek came from the Manhattan Engineering District project.

He said that many properties in this area are tested on a regular basis. Some of the radioactive material is deposited on the school's land when Coldwater Creek floods.

Dangerous Isotopes

According to the report, high levels of thorium- 230 were found at the school.

According to the report, lead-210 was found to be up to 22 times higher than the expected background radiation.

Exposure to radiation and lead poisoning are very dangerous to humans and children. According to the Centers for Disease Control and Prevention, even the smallest amount of lead poisoning can have a devastating effect on a child's development.

Ongoing Saga

The completion date of the river's clean up project was pushed back to 2038 by the Army Corps of Engineers in December of last year.

According to a lawsuit examined by the St. Louis Post-Dispatch, the Corps downplayed the river's potentialcontamination of the school.

An independent investigation was conducted by Boston Chemical after community members distrusted the Corps' findings.

The Corps insists that the school is safe. The program manager of the Corp's clean up program in St. Louis was "appalled" by the independent report.

It's not in line with the way we are supposed to do business. There are questions about the conclusions.

The gender reveal party is under investigation for polluted river.