ARSD 74:51:01:21. Variances from radioactive concentration criteria

Variances from concentration limits specified in §§ 74:51:01:14 through 74:51:01:19, inclusive, are permitted only if there is a natural, uncontrollable contributing source or sources of radionuclides; the best available treatment is provided for all man-made discharges; and the concentration of radionuclides to which humans could be exposed is within the dose limits established in pages 24 to 91, inclusive, of Handbook 69.