Ben Washburn | St. Louis Public Radio

Ben Washburn

The West Lake Landfill, seen from St. Charles Rock Road in Bridgeton.
File Photo | Carolina Hidalgo | St. Louis Public Radio

The Environmental Protection Agency has decided to conduct additional tests for radioactive contamination at the West Lake Landfill, which would delay its excavation of the Superfund site.

When the EPA region that oversees Missouri released its final plan last September to remove 70% of the radioactivity at the site, officials said the cleanup would begin after they spent 18 months planning how to remove the World War II-era waste.

EPA officials announced this week that parties responsible for the landfill signed an agreement with the agency to design the excavation plan. Because of the additional testing, the cleanup won’t begin for two and a half years, EPA spokesperson Ben Washburn said.