Radiological survey of the perimeter fence line of the former Cotter Site, Hazelwood, Missouri (LM002)

A radiological survey was conducted in 1983 by the Oak Ridge National Laboratory along the perimeter fence line of the former Cotter site at 9200 Latty Avenue, Hazelwood, Missouri. During the 1960s and 1970s, process wastes and residues generated by the production and refining of uranium materials were stored at the site (currently owned by the Jarboe Realty and Investment Company). Subsequent to the removal and transport of the stored wastes along with a portion of the top soil to other locations, it was found that the soil remaining on the site contained radioactive residuals. This report describes the survey of the regions along the fence line that surround the property on all sides. Included were: gamma scans of the grid blocks on each side of the fence line; sampling of surface soil; sampling of subsurface soil from auger holes; and gamma logging of auger holes. The results of soil sample analyses demonstrate radionuclide soil contamination with maxima for 226Ra, 230Th, and 238U at 1700, 77,000 and 1200 pCi/g, respectively. These concentrations were found in surface soil taken from 0 to 0.15 m. The depth of contamination ranges from the surface to 1.7 m. The maximum contamination measured during this survey was found at an average depth of 0.36 m. 9 refs., 16 figs., 7 tabs