Radon Control During Remediation

[Bates.Estabrooks@rfets.gov (Bates Estabrooks)]

          Hello Radsafers;
          
          Rocky Flats will shortly begin remediation of an area known as 
          Trench 1 (T1) where ~125 drums of depleted uranium (DU) chips 
          and lathe coolant were buried from 1954 until 1962.
          
          The work will involve excavating the drums and stabilizing the 
          potentially pyrophoric DU, in place.  All work will be 
          performed inside a very large tent to be constructed over the 
          site.
          
          My question concerns the generation of Radon and decay 
          products from the DU (primarily U238) during the work. Are 
          there any regulatory drivers, etc. to require monitoring 
          worker exposure to the Radon products, as would be the case in 
          a uranium mine, since the Radon is being generated from 
          man-made materials?
          
          We intend to air-sample and monitor (with CAMs) for uranium.
          
          Thanks for any input Radsafers might have.
          
          Bates Estabrooks
          bates.estabrooks@rfets.gov