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IRIS Toxicological Review of Ammonia (Revised External Review Draft)

Contact
Audrey Galizia
by phone at:   732-906-6887
by fax at:   732-452-6429
by email at:  galizia.audrey@epa.gov

Notice

EPA's Science Advisory Board (SAB) Staff Office has announced two meetings for the SAB Chemical Assessment Advisory Committee (CAAC), augmented for the review of the draft IRIS assessment of ammonia (CAAC-Ammonia panel). The first meeting is a public teleconference scheduled for June 2, 2014. The second is a face-to face panel meeting scheduled for July 14-16, 2014 in Arlington, VA. Additional information about participation in the external peer review meetings, including how to provide comments to the SAB, are now available on the SAB review of ammonia website and via the Federal Register.

In August 2013, EPA submitted a revised draft IRIS assessment of ammonia to the agency's Science Advisory Board (SAB) and posted this draft on the IRIS website. EPA had previously released a draft of the assessment for public comment, held a public meeting about the draft, and then revised it based on the comments received. The SAB CAAC-Ammonia panel will review this draft assessment. Details about the meeting dates, times, and location are available via the Federal Register Notice posted on March 25, 2014. The SAB provided information on how the public can participate in the external peer review meetings, as well as instructions about how to provide comments to the SAB in the notice. Additional information on the SAB review of ammonia is on the SAB website.

Report Information: The Toxicological Review of Ammonia was originally released for a 60-day public comment period on June 8, 2012. [Federal Register Notice Jun 8, 2012] EPA revised the toxicological review in response to the public comments received. EPA has released the revised external review draft ammonia assessment and the SAB CAAC is conducting a peer review of the scientific basis supporting the assessment that will appear in the Integrated Risk Information System (IRIS) database. Information regarding the peer review can be found at the SAB review of ammonia website.

Downloads/Related Links

This download(s) is distributed solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. It has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency determination or policy.

Related Link(s)

Public Comments

A summary of major public comments and EPA’s response are included as an appendix in the revised assessment. The full submissions by public commenters are available on the docket at http://www.regulations.gov (Docket ID No. EPA-HQ-ORD-2012-0399).

Background
About 80% of commercially produced ammonia is used in agricultural fertilizers. Ammonia is also used as a corrosion inhibitor, in water purification, as a household cleaner, as an antimicrobial agent in food products, as a refrigerant, as a stabilizer in the rubber industry, as a source of hydrogen in the hydrogenation of fats and oils, and as a chemical intermediate in the production of pharmaceuticals, explosives, and other chemicals. Ammonia is also used to reduce nitrogen oxide emissions from combustion sources such as industrial and municipal boilers, power generators, and diesel engines. Ammonia is a component of the global nitrogen cycle and is essential to many biologic processes.

History/Chronology

May 1991The RfC for ammonia was posted to the IRIS database.
Mar 2012EPA hosted an interagency science consultation meeting on the review of the draft Toxicological Review of Ammonia.
Jun 2012EPA released the external review draft of the ammonia assessment for public review and comment. Additionally, the interagency science consultation draft, comments from reviewers, and EPA’s responses to selected major interagency comments were also released.  [Federal Register Notice Jun 8, 2012]
Aug 2013EPA’s Science Advisory Board (SAB) announced a request for nominations for experts to augment the SAB Chemical Assessment Advisory Committee (CAAC) for the review of the EPA’s draft IRIS assessment for ammonia [Federal Register Notice Aug 28, 2013] (3pp., 210Kb, about PDF), and made available the revised external review draft assessment and draft charge to peer reviewers.
Jan 2014EPA’s SAB announced a 3-day public peer review meeting for the draft IRIS Toxicological Review of Ammonia for Feb 18-20, 2014. [Federal Register Notice Jan 31, 2014]
Feb 2014To provide the public with additional time to prepare, EPA SAB staff office is rescheduling the February 18-20 meeting of the SAB Chemical Assessment Advisory Committee (CAAC). The EPA SAB staff office will announce a new date in the near future.
Mar 2014EPA's SAB announced two meetings for the SAB CAAC-Ammonia panel for the review of the draft IRIS assessment of ammonia. A public teleconference is scheduled for June 2, 2014. A face-to face panel meeting is scheduled for July 14-16, 2014 in Arlington,VA. [Federal Register Notice Mar 25, 2014]
Mar 2014EPA updated the peer review charge to include a question regarding EPA's assessment revisions and response to public comments.
Aprl 2014EPA's SAB announced a correction in the Federal Register regarding the date of the CAAC-Ammonia teleconference, the correct date is June 2, 2014. [SAB FR Notice for April 9, 2014]

Next Steps

EPA’s SAB will hold two meetings in June and July 2014 for the external peer review of the ammonia IRIS assessment. Information on the peer review can be found at the SAB Ammonia website. Following external peer review, the assessment will be revised taking into consideration the comments received. It will then undergo a final internal review by EPA, and other federal agencies and the Executive Office of the President. After completing this review it will be posted to the IRIS database.

Citation

U.S. EPA. IRIS Toxicological Review of Ammonia (Revised External Review Draft). U.S. Environmental Protection Agency, Washington, DC, EPA/635/R-13/139a, 2013.

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