Cook's Construction Group Emloyees are Nationally Certified Radon Mitigators through NEHA. The NEHA, National Radon Proficiency Program is the leading certification program for radon professionals in North America. We are pleased to note that our program was officially deemed equivalent to the USEPA'S certification program in 2001. Since then, through the professional efforts of the National Environmental Health Association and the American Association of Radon Scientists and Technologists, and the independent oversight of both an independent Policy Advisory Board and Education Advisory Board, consisting of 16 public and private sector officials, educators, practitioners and well respected scientists, the NRRP program has grown into the largest body of radon professionals anywhere in the world.