UNITED STATES ENVIRONMENTAL PROTECTION AGENCY NATIONAL CENTER FOR ENVIRONMENTAL ASSESSMENT WASHINGTON, DC 20460 February 8, 2016 

### MEMORANDUM OFFICE OF RESEARCH AND DEVELOPMENT 

### SUBJECT: FROM: Posting EPA-HQ -ORD -2013 -0430 to Regulations .gov for Public Access Vicki Soto

## U./~**1\./""** National Center for Environmental Assessment IRIS Division 

### Thru: Gina Perovich Deputy Director, IRIS Division Office of Research and Development National Center for Environmental Assessment This memorandum authorizes the opening ofEPA-HQ-ORD-2013 -0430 to Regulations .gov for public access from February 8, 2016 to December 31, 2016 . EPA is actively working on the IRIS assessment of Hexahydro - 1 ,3,5-trinitro- 1,3,5 - triaz ine (RDX) . During 2016, materials related to the RDX assessment may be discussed at an IRIS public science meeting or other public meetings related to the IRIS assessment. As part of the effort to increase the opportunity for public input, this docket will be used to accept public comments related to the IRIS assessment of RDX . Comments on the IRIS assessment ofRDX should be submitted to Docket ID No . EPAHQ -ORD-2013 -0430 by one ofthe following methods : • http ://www.regulations.gov . Follow the on-line instructions for submitting comments . • E-mail : Docket ORD ( ci !epa.gov . • Fax : 202-566-9744 . • Mail : U .S. Environmental Protection Agency, EPA Docket Center, (ORO Docket), Mail Code : 28221T, 1200 Pennsylvania Avenue, N.W ., Washington, DC 20460 . • Hand Delivery: The ORO Docket is located in the EPA Headquarters Docket Center, EPA West Building, Room 3334, 1301 Constitution Avenue , N .W ., Washington, DC 20004 . Such deliveries are only accepted during the Docket's normal hours of operation, and special arrangements should be made for deliveries of boxed information . EPA ' s policy is that all comments received will be included in the public docket without change and may be made available online at http ://www .regulations.gov, including any personal information provided, unless the comment includes information claimed to be
Internet Address (URL) • http ://www .epa .gov Recycled/Recyclable • Printed with Vegetable 011 Based Inks on 100"/o Postconsumer, Process Chlorine Free Recycled PaperConfidential Business Information (CBI) or other information whose disclosure is restricted by statute. Do not submit information that you consider to be CBI or otherwise protected through http://www.regulations.gov or e-mail. The http://www.regulations.gov Web site is an "anonymous access" system, which means EPA will not know your identity or contact information unless you provide it in the body of your comment. If you send an e-mail comment directly to EPA without going through http://www.regulations.gov. your e-mail address will be automatically captured and included as part of the comment that is placed in the public docket and made available on the Internet. If you submit an electronic comment, EPA recommends that you include your name and other contact information in the body of your comment and with any disk or CD-ROM you submit. IfEPA crumot read your comment due to technical difficulties and cannot contact you for clarification, EPA may not be able to consider your comment. Electronic files should avoid the use of special characters, avoid any form ofencryption, and be free of any defects or viruses. For additional information about EPA's public docket, visit the EPA Docket Center homepage at http://www2.epa.gov/dockets . Should you have any questions regarding this memorandum, please contact Eric Shultz at (202) 566-1883, or via email at schultz.eric(a),epa.gov.