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<H1><!-- #BeginEditable "PageName" -->Treatment of Data Influenced by 
Exceptional Events<!-- #EndEditable --></H1><!-- END PAGE NAME --><!-- BEGIN CONTENT AREA --><!-- #BeginEditable "content" -->
<DIV class=boxmulti>
<H5>Announcements</H5>
<P><STRONG>EPA Releases Interim Guidance and Announces Intention to Pursue 
Exceptional Event Rule Revisions</STRONG><BR>On Friday, May 10, 2013, EPA issued 
interim guidance to help state, local and tribal governments manage air quality 
data recorded during “exceptional events.” EPA also announced our intention to 
propose and finalize revisions to the 2007 Exceptional Events Rule, which will 
incorporate into regulation important aspects of the Interim Guidance and 
further streamline implementation challenges. </P></DIV>
<P>Exceptional Events are unusual or naturally occurring events that can affect 
air quality but are not reasonably controllable using techniques that tribal, 
state or local air agencies may implement in order to attain and maintain the 
National Ambient Air Quality Standards.</P>
<P><B>Contact:</B>      Mark 
Evangelista<BR>             
       <A 
href="mailto:evangelista.mark@epa.gov">Evangelista.Mark@epa.gov</A><BR>             
       (919) 541-2803 </P>
<H5>Background</H5>
<P>The Environmental Protection Agency (EPA) finalized a rule to establish 
criteria and procedures for use in determining if air quality monitoring data 
has been influenced by exceptional events. The rule:</P>
<UL>
  <LI>ensures that air quality measurements are properly evaluated and 
  characterized with regard to their causes, 
  <LI>identifies reasonable actions that should be taken to address the air 
  quality and public health impacts caused by these types of events, 
  <LI>avoids imposing unreasonable planning requirements on state, local, and 
  tribal air quality agencies related to violations of the NAAQS due to 
  exceptional events, and 
  <LI>ensures that the use of air quality data, whether afforded special 
  treatment or not, is subject to full public disclosure and review. </LI></UL>
<P>In July 2012, EPA issued a <EM>Federal Register</EM> Notice of Availability 
announcing the release of draft exceptional events implementation guidance 
developed to clarify key provisions of the 2007 Exceptional Events Rule (EER), 
respond to questions and issues that arose after the EER was promulgated, and 
reduce the burden associated with the demonstration preparation and review 
process. After considering the feedback received during the public comment 
period, EPA has decided to resolve a number of commenter-identified issues and 
needed clarifications in a more formal rulemaking process. Because the notice 
and comment rulemaking process is expected to take up to two years to conclude, 
EPA is issuing the interim guidance.</P>
<P><STRONG>Interim Exceptional Events Guidance Documents (Posted: 
05/13/13)</STRONG></P>
<UL>
  <LI><A href="http://epa.gov/ttn/analysis/docs/exceptevents_fs_130510.pdf">Fact 
  Sheet (PDF)</A> <SPAN class=fileinfo>(3pp, 95k) </SPAN> 
  <LI><A 
  href="http://epa.gov/ttn/analysis/docs/exceptevents_guidememo_130510.pdf">Interim 
  Guidance to Implement Requirements for the Treatment of Air Quality Monitoring 
  Data Influenced by Exceptional Events (PDF)</A> <SPAN class=fileinfo>(10pp, 
  904k) </SPAN> 
  <UL>
    <LI><A 
    href="http://epa.gov/ttn/analysis/docs/EER_QA_Doc_5-10-13_r3.pdf">Attachment 
    1, Interim Exceptional Events Rule Frequently Asked Questions (PDF)</A> 
    <SPAN class=fileinfo>(50pp, 321k) </SPAN> 
    <LI><A 
    href="http://epa.gov/ttn/analysis/docs/exceptevents_highwinds_guide_130510.pdf">Attachment 
    2, Interim Guidance on the Preparation of Demonstrations in Support of 
    Requests to Exclude Ambient Air Quality Data Affected by High Winds under 
    the Exceptional Events Rule (PDF)</A> <SPAN class=fileinfo>(82pp, 10.0 
    MB) </SPAN> </LI></UL></LI></UL>
<P><EM>For guidance-related questions, please contact Beth W. Palma at 
919-541-5432 or <A 
href="mailto:palma.elizabeth@epa.gov">palma.elizabeth@epa.gov</A></EM></P>
<H5>Examples of Reviewed Exceptional Event Submissions</H5>
<P>These documents are examples of exceptional event submissions, or the 
decision documents responding to the demonstrations, for various cases of 
exceptional events. The purpose of this table is to provide examples of 
Exceptional Event demonstrations that have been reviewed by EPA. This table is 
not intended to serve as a database for all Agency actions on exceptional 
events. These examples may help agencies develop demonstration packages 
submitted in support of requests for data exclusion due to influence of 
Exceptional Events; however, they may not contain the minimum level of data or 
case-specific analyses necessary for any other exceptional event 
demonstration.</P>
<P>Please note that not all concentrations addressed in the demonstrations in 
this table may have resulted in EPA concurrences.</P>
<TABLE class="tablebord zebra" cellSpacing=0 cellPadding=0>
  <COLGROUP>
  <COL width=168>
  <COL width=138>
  <COL width=157>
  <COL width=287>
  <TBODY>
  <TR height=26>
    <TD height=26 colSpan=4>
      <DIV align=center><STRONG>PM2.5</STRONG></DIV></TD></TR>
  <TR height=21>
    <TD height=21 width=180><STRONG>Event</STRONG></TD>
    <TD width=112><STRONG>Agency</STRONG></TD>
    <TD width=167><STRONG>Location</STRONG></TD>
    <TD width=363><STRONG>Available Documentation</STRONG></TD></TR>
  <TR height=56>
    <TD height=56 width=180>Volcanic Emissions 2011-2013</TD>
    <TD width=112>Hawaii Dept of Health</TD>
    <TD width=167>Kona, Hawaii</TD>
    <TD width=363><A 
      href="http://epa.gov/ttn/analysis/docs/1HDOH_11-12VolcanoPMEE_DemoTrans_121113.pdf">HDOH 
      2011-2012 Demonstration (12/11/13)</A> <SPAN class=fileinfo>(PDF, 6.5 
      MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/2HDOH_11-12VolcanoPMEE_Pubcomments_030314.pdf">HDOH 
      Received Public Comments on 2011-2012 Demonstration 
      (3/3/14)</A> <SPAN class=fileinfo>(PDF, 188 KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/3HDOH_11-12VolcanoPMEEAddendand13Demo_Trans_070114.pdf">HDOH 
      2011-2012 Demonstration Addendum and 2013 Demonstration 
      (7/1/14)</A> <SPAN class=fileinfo>(PDF, 26.9 MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/4HDOH_11-13VolcanoPMEEConcurTSD_071014.pdf">EPA 
      response letter and technical support document (7/10/14)</A> <SPAN 
      class=fileinfo>(PDF, 2.2 MB)</SPAN> <BR><A 
      href="http://epa.gov/ttn/analysis/docs/09_HDOHEETypoMemo_102714.pdf">EPA 
      memorandum correcting typographical error (10/27/14)</A> <SPAN 
      class=fileinfo>(PDF, 124 KB)</SPAN></TD></TR>
  <TR height=56>
    <TD height=56 width=180>Summer 2008 Wildfires<BR>(series 2)</TD>
    <TD width=112>California ARB</TD>
    <TD width=167>Plumas and Shasta Cos.</TD>
    <TD width=363><A 
      href="http://epa.gov/ttn/analysis/docs/Shasta%20Plumas%20demonstration%20series%202%2082809.zip">Shasta-Plumas 
      demonstration series 2 (8/28/09)</A> <SPAN class=fileinfo>(ZIP, 463 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20response%20letter%2040210.pdf">EPA 
      response letter (4/02/10)</A> <SPAN class=fileinfo>(PDF, 53 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20technical%20support%20document%2033010.pdf">EPA 
      technical support document (3/30/10)</A> <SPAN class=fileinfo>(PDF, 
      1.5 MB)</SPAN></TD></TR>
  <TR height=56>
    <TD height=56 width=180>Summer 2008 Wildfires<BR>(series 1)</TD>
    <TD width=112>California ARB</TD>
    <TD width=167>Plumas and Shasta Cos.</TD>
    <TD width=363><A 
      href="http://epa.gov/ttn/analysis/docs/Shasta%20Plumas%20demonstration%20series%201%2082809.zip">Shasta-Plumas 
      demonstration series 1 (8/28/09)</A> <SPAN class=fileinfo>(ZIP, 900 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20response%20letter%2031110.pdf">EPA 
      response letter (3/11/10)</A> <SPAN class=fileinfo>(PDF, 60 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20technical%20support%20document%2031110ps08.pdf">EPA 
      technical support document (3/11/10)</A> <SPAN class=fileinfo>(PDF, 
      1.5 MB)</SPAN></TD></TR>
  <TR height=56>
    <TD height=56 width=180>Summer 2007 Wildfires</TD>
    <TD width=112>California ARB</TD>
    <TD width=167>Plumas Co.</TD>
    <TD width=363><A 
      href="http://epa.gov/ttn/analysis/docs/Plumas%20demonstration%2061709.zip">Plumas 
      demonstration (6/17/09)</A> <SPAN class=fileinfo>(ZIP, 29 
      MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20response%20letter%2031110.pdf">EPA 
      response letter (3/11/10)</A> <SPAN class=fileinfo>(PDF, 60 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20technical%20support%20document%2031110p07.pdf">EPA 
      technical support document (3/11/10)</A> <SPAN class=fileinfo>(PDF, 
      980 KB)</SPAN></TD></TR>
  <TR height=56>
    <TD height=56 width=180>July 2008 Fireworks</TD>
    <TD width=112>Illinois EPA</TD>
    <TD width=167>Granite City, IL </TD>
    <TD width=363><A 
      href="http://epa.gov/ttn/analysis/docs/Granite%20City%20Demonstration%2061109.zip">Granite 
      City demonstration (6/17/09)</A> <SPAN class=fileinfo>(ZIP, 603 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20response%20letter%2072409.pdf">EPA 
      response letter (7/24/09)</A> <SPAN class=fileinfo>(PDF, 225 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20technical%20support%20document%2072409.pdf">EPA 
      technical support document (7/24/09)</A> <SPAN class=fileinfo>(PDF, 
      443 KB)</SPAN></TD></TR>
  <TR height=64>
    <TD height=64 width=180>Summer 2007 Wildfires</TD>
    <TD width=112>Montana DEQ</TD>
    <TD width=167>Multiple locations across Montana</TD>
    <TD width=363>
      <P><A 
      href="http://epa.gov/ttn/analysis/docs/MT%20DEQ%20demonstration%20121407.pdf">MT 
      DEQ demonstration (12/14/07)</A> <SPAN class=fileinfo>(PDF, 43 
      MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20response%20letter%2081808.pdf">EPA 
      response letter (8/18/08)</A> <SPAN class=fileinfo>(PDF, 758 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20technical%20support%20document%2081808.pdf">EPA 
      technical support document (8/18/08)</A> <SPAN class=fileinfo>(PDF, 
      272 KB)</SPAN></P></TD></TR>
  <TR height=56>
    <TD height=56 width=180>July 2007 Wildfire</TD>
    <TD width=112>Utah DEQ</TD>
    <TD width=167>Lindon, UT</TD>
    <TD width=363><A 
      href="http://epa.gov/ttn/analysis/docs/Lindon%20demonstration%20122407.pdf">Lindon 
      demonstration (12/24/2007)</A> <SPAN class=fileinfo>(PDF, 3 
      MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20response%20letter%2042908.pdf">EPA 
      response letter (4/29/08)</A> <SPAN class=fileinfo>(PDF, 612 
      KB)</SPAN></TD></TR>
  <TR height=64>
    <TD height=64 width=180>July 2007 Fireworks</TD>
    <TD width=112>Utah DEQ</TD>
    <TD width=167>Rose Park, UT<BR>West Valley, UT</TD>
    <TD width=363><A 
      href="http://epa.gov/ttn/analysis/docs/Rose%20Park%20demonstration%20122407.pdf">Rose 
      Park demonstration (12/24/2007)</A> <SPAN class=fileinfo>(PDF, 895 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/West%20Valley%20demonstration%20122407.pdf">West 
      Valley demonstration (12/24/2007)</A> <SPAN class=fileinfo>(PDF, 877 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20response%20letter%2042908.pdf">EPA 
      response letter (4/29/08)</A> <SPAN class=fileinfo>(PDF, 612 
      KB)</SPAN></TD></TR></TBODY></TABLE>
<TABLE class="tablebord zebra" cellSpacing=0 cellPadding=0>
  <COLGROUP>
  <COL width=168>
  <COL width=138>
  <COL width=157>
  <COL width=287>
  <TBODY>
  <TR height=26>
    <TD height=26 colSpan=4>
      <DIV align=center><STRONG>PM10</STRONG></DIV></TD></TR>
  <TR height=21>
    <TD height=21 width=179><STRONG>Event</STRONG></TD>
    <TD width=112><STRONG>Agency</STRONG></TD>
    <TD width=167><STRONG>Location</STRONG></TD>
    <TD width=364><STRONG>Available Documentation</STRONG></TD></TR>
  <TR height=64>
    <TD height=64 width=179>July 2011 High Wind Dust Event </TD>
    <TD width=112>Clark County Nevada DAQ</TD>
    <TD width=167>Las Vegas Valley</TD>
    <TD width=364><A 
      href="http://epa.gov/ttn/analysis/docs/1ClarkCoNV_2011PM10HWDE%20_Demo.pdf">Clark 
      County NV demonstration (4/11/14)</A> <SPAN class=fileinfo>(PDF, 28.5 
      MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/2ClarkCoNV_2011PM10HWDE_ConcurTSD_062514.pdf">EPA 
      response letter and technical support document (06/25/14)</A> <SPAN 
      class=fileinfo>(PDF, 664 KB)</SPAN></TD></TR>
  <TR height=64>
    <TD height=64 width=179>July 2011 High Wind Dust Event </TD>
    <TD width=112>Arizona DEQ</TD>
    <TD width=167>Phoenix, AZ </TD>
    <TD width=364><A 
      href="http://epa.gov/ttn/analysis/docs/AZ%20DEQ%20July%202011%20PM10%20EE%20Demo_Final%2020120308.pdf">AZ 
      DEQ demonstration (3/8/12)</A> <SPAN class=fileinfo>(PDF, 9.6 
      MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20resp%20ltr_TSD_090612.pdf">EPA 
      response letter and technical support document (9/6/12)</A> <SPAN 
      class=fileinfo>(PDF, 801 KB)</SPAN></TD></TR>
  <TR height=64>
    <TD height=64 width=179>August 2007 Wildfires</TD>
    <TD width=112>Montana DEQ</TD>
    <TD width=167>Silverbow Co., MT</TD>
    <TD width=364><A 
      href="http://epa.gov/ttn/analysis/docs/MT%20DEQ%20demonstration%20121407.pdf">MT 
      DEQ demonstration (12/14/07)</A> <SPAN class=fileinfo>(PDF, 43 
      MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20response%20letter%2081808.pdf">EPA 
      response letter (8/18/08)</A> <SPAN class=fileinfo>(PDF, 758 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20technical%20support%20document%2081808.pdf">EPA 
      technical support document (8/18/08)</A> <SPAN class=fileinfo>(PDF, 
      272 KB)</SPAN></TD></TR></TBODY></TABLE>
<TABLE class="tablebord zebra" cellSpacing=0 cellPadding=0>
  <COLGROUP>
  <COL width=168>
  <COL width=138>
  <COL width=157>
  <COL width=287>
  <TBODY>
  <TR height=26>
    <TD height=26 colSpan=4>
      <DIV align=center><STRONG>Ozone</STRONG></DIV></TD></TR>
  <TR height=21>
    <TD height=21 width=179><STRONG>Event</STRONG></TD>
    <TD width=112><STRONG>Agency</STRONG></TD>
    <TD width=167><STRONG>Location</STRONG></TD>
    <TD width=364><STRONG>Available Documentation</STRONG></TD></TR>
  <TR height=64>
    <TD height=64 width=179>June 2012 Stratospheric Ozone Intrusion</TD>
    <TD width=112>Wyoming Department of Environmental Quality</TD>
    <TD width=167>Big Piney and Boulder, Wyoming</TD>
    <TD width=364><A 
      href="http://epa.gov/ttn/analysis/docs/June_14_2012_BigPiney_Boulder_SI_Package.pdf">WYDEQ 
      demonstration</A> <SPAN class=fileinfo>(PDF, 5.2 MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/June_14_2012_Strat_O3_Concurrence_Letter_28_March_2014.pdf">EPA 
      response letter (May 28, 2014)</A> <SPAN class=fileinfo>(PDF, 72 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/TSD_Strat_O3_June_14_2012_Wyo.pdf">EPA 
      Technical Support Document</A> <SPAN class=fileinfo>(PDF, 2 
    MB)</SPAN></TD></TR>
  <TR height=64>
    <TD height=64 width=179>April 2011 Fires</TD>
    <TD width=112>Kansas Department of Health and Environment</TD>
    <TD width=167>Kansas City, Wichita, and Topeka areas, KS</TD>
    <TD width=364><A 
      href="http://epa.gov/ttn/analysis/docs/KDHE_ExEvents_final_042011.pdf">KDHE 
      demonstration (11/27/12)</A> <SPAN class=fileinfo>(PDF, 18.2 
      MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/Flint_Hills_Concurrence_Letter_dated_12-28-12.pdf">EPA 
      response letter (12/28/12)</A> <SPAN class=fileinfo>(PDF, 96 
      KB)</SPAN></TD></TR>
  <TR height=64>
    <TD height=64 width=179>Summer 2008 Wildfires</TD>
    <TD width=112>California ARB</TD>
    <TD width=167>Sacramento County, CA</TD>
    <TD width=364><A 
      href="http://epa.gov/ttn/analysis/docs/CARB%20Demonstration%2033011.zip">CARB 
      demonstration (3/30/11)</A> <SPAN class=fileinfo>(ZIP, 80 
      MB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20Response%20letter%2041311.pdf">EPA 
      response letter (4/13/11)</A> <SPAN class=fileinfo>(PDF, 92 
      KB)</SPAN><BR><A 
      href="http://epa.gov/ttn/analysis/docs/EPA%20Technical%20Support%20Document%2041311.pdf">EPA 
      technical support document (4/13/11)</A> <SPAN class=fileinfo>(PDF, 
      238 KB)</SPAN></TD></TR></TBODY></TABLE>
<H5>Publicly Available Support Information and Tools</H5>
<P><EM>EPA provides no endorsement of specific publicly available tools, nor 
does EPA mandate their use. EPA believes that publicly available tools can 
provide supporting documentation for one or several of the exceptional event 
criteria within an air agency exceptional event demonstration, but EPA generally 
does not believe that links and/or references to these tools constitute a 
complete demonstration submittal.</EM></P>
<UL>
  <LI><A 
  href="http://epa.gov/ttn/analysis/docs/IdeasforShowingEEEvidence.pdf">Technical 
  Support Document (TSD) Preparation - “best practices and components” 
  presentation</A> <SPAN class=fileinfo>(PDF, 3.0 MB)</SPAN> 
  <LI><A href="http://www.epa.gov/rsig">Remote Sensing Information Gateway</A> 
  <LI><A href="http://firesmoke.us/wfdss">Wildland Fire Air Quality Tools 
  Portal</A> <A href="http://www.epa.gov/epahome/exitepa.htm"><IMG border=0 
  alt="Exit EPA disclaimer" align=bottom 
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