"Man-made beta particle and photon emitters" mean all radionuclides which emit beta particles or photons, or both, listed in Maximum Permissible Body Burdens and Maximum Permissible Concentration of Radionuclides in Air or Water for Occupational Exposure, NBS Handbook 69, except the daughter products of thorium-232, uranium-235 and uranium-238.
N.H. Admin. Code § Env-Ws 302.38
#8498, eff 11-30-05