It would be a first in the long cleanup history of the world's most toxic waste site.

According to the Department of Energy, a portion of the Hanford cleanup area could very soon be declared "clean," or no longer contaminated.

The 1.2 square mile section is known as the 1100 area, and was among the very first work completed under the 1996 Superfund Act by Congress. The are didn't contain high-level dangerous toxic waste comparable to what's being stored in the 167 tanks, but did consist of significant amounts of battery acid, paints and antifreeze, as well as underground tanks that held gasoline and oil.

Washington state is getting ready to remove the "contaminated" classification from the 1100 area, and it would come off the state's list of hundreds of contaminated sites.