On February 25, 2015 (80 FR 10165), the Nuclear Regulatory Commission (NRC) published a notice in the federal register issuing Revision 1 of the Branch Technical Position on Concentration Averaging and Encapsulation (CA BTP). Volume 1 of this guidance provides acceptable methods that can be used to perform concentration averaging of low-level radioactive waste (LLW) for the purpose of determining its waste class for disposal. The previous version of the CA BTP was published in 1995 (dated January 17, 1995). Revision 1 of the CA BTP (ML12254B065) has been developed after consideration of public comments on three drafts. Detailed responses to each of the public comments are available in Volume 2 of the revised CA BTP (ML12326A611). Appendix B of Volume 1 of the revised CA BTP has a more complete list of changes. Both volumes are available by searching on the NRC ADAMS Public Documents collection at http://www.nrc.gov/reading-rm/adams.html.