Updated at 1:25 p.m. to add statement from Republic Services, and at 6:00 p.m. to add comments from EPA.
More radioactive material has been found at the West Lake Landfill in Bridgeton.
The material was detected during radioactivity testing in preparation for the construction of a trench. That trench will separate radioactive waste at the West Lake Landfill from an underground fire smoldering at the adjacent Bridgeton Landfill.
The U.S. Environmental Protection Agency is overseeing the construction of the firebreak trench.
Attorney General Chris Koster has asked the federal Environmental Protection Agency to conduct radioactivity tests at the West Lake landfill in Bridgeton that were delayed because of the government shutdown.
The company that owns the Bridgeton Landfill is offering to cover the cost of hotel stays for nearby residents who want to get away from the smell.
On Tuesday, Republic Services sent a letter to 270 households within a one-mile radius of the landfill, saying the company would pay for residents to move to a pet-friendly hotel between May 20 and June 14.