An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Technical Guidance for Hazardous Analysis, Emergency Planning for Extremely Hazardous Substances

This guide supplements NRT-1 by providing technical assistance to Local Emergency Planning Committees to assess the lethal hazards related to potential airborne releases of extremely hazardous substances as designated under Section 302 of Title Ill of SARA. Anyone using this guide also needs to acquire and use NRT-1.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.