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<title>Special Notes</title>
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<kwd-group><title>Keywords: </title><kwd>computer security incident</kwd><kwd>incident handling</kwd><kwd>incident response</kwd><kwd>information security</kwd></kwd-group>

<sec sec-type="introduction">
<title>Introduction</title>
<p>Post-combustion NOx control systems reduce levels of NOx emissions by converting the NOx formed during the combustion process to nitrogen (N<sub>2</sub>) gas. The chemical reactions required to convert the NOx to N<sub>2</sub> for the systems described in this standard are applied downstream of the combustion zone. These techniques introduce a reactant into the flue gas stream to react with the NOx. The reaction may be completed with or without the use of catalyst.</p>
<p>It may be necessary to combine more than one method of post-combustion control to achieve the desired level of NOx reduction.</p>
<p>The application of any NOx reduction technique and control technology is most often in compliance with an environmental regulation requirement, which include both instantaneous and time averaged performance criteria. Reliable and effective performance of the NOx control systems and related mechanical systems and components are critical in meeting regulatory requirements and environmentally responsible operation.</p>
<p>The fundamental elements that are required to provide the expected reliability and performance requirements for post-combustion NOx control systems specified and supplied through the use of this standard include the following:</p>
<list id="L1" list-type="bullet">
<list-item><label>—</label><p>process definition;</p></list-item>
<list-item><label>—</label><p>process performance expectations;</p></list-item>
<list-item><label>—</label><p>system design selection;</p></list-item>
<list-item><label>—</label><p>mechanical definition of systems and components.</p></list-item></list>
<p>The selected post-combustion NOx control systems and equipment should be capable of the specified performance for a design period for the run length specified in the data sheets without the need for an unplanned outage of the post-combustion NOx treatment control systems and equipment or the associated combustion equipment.</p>
</sec>

<ack>
<title>Acknowledgements</title>
<p>This publication was developed by the <italic>Joint Task Force Transformation Initiative</italic> Interagency Working Group with representatives from the Civil, Defense, and Intelligence Communities in an ongoing effort to produce a unified information security framework for the federal government. The National Institute of Standards and Technology wishes to acknowledge and thank the senior leaders from the Departments of Commerce and Defense, the Office of the Director of National Intelligence, the Committee on National Security Systems, and the members of the interagency technical working group whose dedicated efforts contributed significantly to the publication. The senior leaders, interagency working group members, and their organizational affiliations include:</p>
<list list-type="simple" list-content="committee">
<title>U.S. Department of Defense Office of the Director of National Intelligence</title>
<list-item>
<p content-type="committee-member">Teresa M. Takai Adolpho Tarasiuk Jr.</p>
<p content-type="affiliation">Assistant Secretary of Defense for Networks and Assistant Director of National Intelligence and</p>
<p content-type="affiliation">Information Integration/DoD Chief Information Intelligence Community Chief Information</p>
<p content-type="affiliation">Officer (Acting) Officer</p>
</list-item>
<list-item>
<p content-type="committee-member">Gus Guissanie Charlene P. Leubecker</p>
<p content-type="affiliation">Deputy Assistant Secretary of Defense (Acting) Deputy Intelligence Community Chief</p>
<p content-type="affiliation">Information Officer</p>
</list-item>
<list-item>
<p content-type="committee-member">Dominic Cussatt Mark J. Morrison</p>
<p content-type="affiliation">Senior Policy Advisor Director, Intelligence Community Information</p>
<p content-type="affiliation">Assurance</p>
</list-item>
<list-item>
<p content-type="committee-member">Barbara Fleming Roger Caslow</p>
<p content-type="affiliation">Senior Policy Advisor Chief, Risk Management and Information</p>
<p content-type="affiliation">Security Programs Division</p>
</list-item>
</list>
</ack>