‘‘all of which are consistent with recommendations from authoritative radiation protection bodies,’’ suggested
only a ‘‘reasonable starting point’’ for our rulemaking, and that none of the regulatory precedents considered by
NAS applied for periods approaching 1 million years. (NAS Report pp. 5 and 49, respectively) In fact, NAS explicitly
declined to recommend a level of protection, recognizing that this was a matter best left to EPA to establish through rulemaking: ‘‘We have not recommended what levels of risk are acceptable