Adopting a code requiring radon-resistant new construction (RRNC) in Decatur, Alabama. September 2007. You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more. Citizen Action Can Help the Code Adoption Process for Radon-Resistant New Construction Decatur, Alabama September 2007 (PDF)(1 pg, 14 K, September 2007 )