RADIUM-226 AND RADON-222 REMEDIAL ACTION GUIDES (ABove BACKGROUND) RADIONUCLIDE GUIDE RADON-222 >0.03 REauIRED ACTION <0,02 No ACTION >3eC1/1 REaurIRED ACTION +DAUGHTERS Rapon-222 ACTION ONDITIO STRUCTURES BOUNDARY OF CONTROLLED PROPERTY >30eC1/1 RequirepD ACTION OveR SURFACE OF CONTROLLED PROPERTY RADI UM-226 >15PCi/c REQUIRED ACTION 19 cm or Less Soir THICKNESS >5eC1/1 REQUIRED ACTION SuRFACE WATER OR GROUND WATER Gamma Dose >0.02 MREM/HR REQUIRED ACTION EXTERNAL RADIATION