This figure from the USGS West Lake Landfill groundwater report shows levels of radium in groundwater wells under and around the landfill. Red, orange, and yellow dots show radium contamination above the federal safe drinking water standard.
Updated 10/17/14: Republic Services has confirmed that it agreed on Thursday, in writing, to comply with all of the Missouri Department of Natural Resources' requirements ― although the company remains committed to its position that the additional measures are not needed.
A new analysis by scientists at the U.S. Environmental Protection Agency suggests there could be risks to area residents if an underground fire were to reach radioactive waste at the West Lake Landfill.
An underground fire has been smoldering at the adjacent Bridgeton Landfill for more than three years and is now about 900 to 1,000 feet from the radioactive material.
Map shows concentrations of carbon monoxide collected from gas extraction wells at the Bridgeton Landfill on January 24. Readings above 1,000 ppm indicate an underground fire. Radioactive waste is located north of the wells shown in purple.
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.