In 2012, The Mark Twain National Forest completed soil sampling in many areas of Southeast Missouri lead mining area. A few recreation sites were found to have elevated concentrations of lead, but there was not a clear trend indicating where we would find lead.
In Fall 2014, we partnered with the Missouri Department of Natural Resources to sample every campsite and day-use area at in the area for lead (Pb) in surface soil and crushed rock, which led to the current action.
In the Summer of 2015, we capped contaminated areas at 100 campsites and day use areas. The intent of this action is to reduce human contact with lead in soils by putting down a layer of clean material that has low lead concentrations. This project was a clean-up action under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and is categorized as a Time Critical Removal Action
The Forest Service plans to review the protectiveness of a CERLCA Time Critical Removal Action after elevated levels of lead (Pb) were discovered. This protectiveness review will allow us to determine if any additional work needs to be conducted at these sites.
The risks of lead exposure at these sites are generally considered to be low, especially if you are only at these sites a couple of times a year.
Read More about the Five Year Review of Time Critical Removal Action