Alert

Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

Health Physics Questions and Answers - Question 425

Question 425: It appears that some of the oral ingestion ALIs in Appendix B of 10 CFR 20 are sometimes associated with the wrong chemical forms; is this the case?

Answer: No. See the answer to Question 71 in section 10 CFR Part 20, Appendix B which indicates that the "Class" column of 10 CFR Appendix B applies to inhalation only; it does not refer to ingestion. In other words, neither the D, W, and Y classes nor the chemical forms (compounds) in the "Class" column refer to the ingestion ALIs.

(Reference: 10 CFR 20 Appendix B)

Page Last Reviewed/Updated Tuesday, December 12, 2017