﻿<metadata>
  <idinfo>
    <citation>
      <citeinfo>
        <origin>Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)</origin>
        <origin>Federal Highway Administration, Office of Planning, HEPP-1</origin>
        <origin>U.S. Environmental Protection Agency, Butch Stackhouse, State and Local Programs Group, Air Quality Policy Division, Office of Air Quality Planning and Standards</origin>
        <pubdate>20060101</pubdate>
        <title>CO_1990NAAQS</title>
        <geoform>vector digital data</geoform>
        <pubinfo>
          <pubplace>Washington, DC</pubplace>
          <publish>Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)</publish>
        </pubinfo>
        <onlink>http://www.bts.gov/programs/geographic_information_services/</onlink>
      </citeinfo>
    </citation>
    <descript>
      <abstract>Non-attainment and maintenance areas for the United States and its territories. The standard for the CO NAA is 9 ppm. For more detailed information on this dataset, see the Overview Description in the Entity Attribute section of this document.</abstract>
      <purpose>To establish the spatial boundaries of each nonattainment and maintenance area. </purpose>
    </descript>
    <timeperd>
      <timeinfo>
        <sngdate>
          <caldate>20110101</caldate>
        </sngdate>
      </timeinfo>
      <current>publication date</current>
    </timeperd>
    <status>
      <progress>Complete</progress>
      <update>Annually</update>
    </status>
    <spdom>
      <bounding>
        <westbc>-150.044594</westbc>
        <eastbc>-70.868654</eastbc>
        <northbc>64.864055</northbc>
        <southbc>31.739605</southbc>
      </bounding>
    </spdom>
    <keywords>
      <theme>
        <themekt>Air Quality</themekt>
        <themekey>Maintenance area</themekey>
        <themekey>Nonattainment area</themekey>
        <themekey>Criteria Pollutant</themekey>
        <themekey>Carbon Monoxide</themekey>
      </theme>
      <place>
        <placekt>None</placekt>
        <placekey>USA</placekey>
      </place>
      <temporal>
        <tempkt>None</tempkt>
        <tempkey>2007</tempkey>
        <tempkey>2011</tempkey>
        <tempkey>2008</tempkey>
        <tempkey>2009</tempkey>
        <tempkey>2010</tempkey>
        <tempkey>2012</tempkey>
        <tempkey>2013</tempkey>
      </temporal>
    </keywords>
    <accconst>None</accconst>
    <useconst>The Non-attainment Area - Carbon Monoxide dataset, or any portion thereof, can be freely distributed as long as this metadata entry is included with each distribution. Acknowledgment of the Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS) National Transportation Atlas Databases (NTAD) 2013 would be appreciated in products derived from these data.</useconst>
    <ptcontac>
      <cntinfo>
        <cntorgp>
          <cntorg>Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)</cntorg>
          <cntper>Office of Geospatial Information Systems</cntper>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical</addrtype>
          <address>1200 New Jersey Ave., SE</address>
          <city>Washington</city>
          <state>DC</state>
          <postal>20590</postal>
          <country>US</country>
        </cntaddr>
        <cntvoice>1 202 366 DATA</cntvoice>
        <cntemail>answers@bts.gov</cntemail>
      </cntinfo>
    </ptcontac>
    <ptcontac>
      <cntinfo>
        <cntorgp>
          <cntorg>U.S. Environmental Protection Agency</cntorg>
          <cntper>Butch Stackhouse</cntper>
        </cntorgp>
        <cntpos>State and Local Programs Group, Air Quality Policy Division, Office of Air Quality Planning and Standards</cntpos>
        <cntvoice>919.541.5208</cntvoice>
        <cntemail>stackhouse.butch@epa.gov</cntemail>
      </cntinfo>
    </ptcontac>
    <secinfo>
      <secclass>Unclassified</secclass>
    </secinfo>
    <native>Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.0.3035</native>
    <crossref>
      <citeinfo>
        <origin>Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)</origin>
        <pubdate>20110101</pubdate>
        <title>National Transportation Atlas Databases (NTAD) 2013</title>
        <geoform>vector digital data</geoform>
        <pubinfo>
          <pubplace>Washington, DC</pubplace>
          <publish>Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)</publish>
        </pubinfo>
        <onlink>http://www.bts.gov/programs/geographic_information_services/</onlink>
      </citeinfo>
    </crossref>
  </idinfo>
  <dataqual>
    <attracc>
      <attraccr>Unknown</attraccr>
      <qattracc>
        <attraccv>None</attraccv>
        <attracce>Unknown</attracce>
      </qattracc>
    </attracc>
    <logic>None</logic>
    <complete>Unknown</complete>
    <posacc>
      <horizpa>
        <horizpar>Unknown</horizpar>
      </horizpa>
    </posacc>
    <lineage>
      <srcinfo>
        <srccite>
          <citeinfo>
            <pubdate>20050101</pubdate>
            <title>40 Code of Federal Regulations Part 81</title>
            <othercit>The spatial boundaries of each nonattainment and maintenance area are defined in 40 Code of Federal Regulations Part 81.</othercit>
            <onlink>http://www.epa.gov/epahome/cfr40.htm</onlink>
          </citeinfo>
        </srccite>
        <typesrc>None</typesrc>
        <srctime>
          <timeinfo>
            <sngdate>
              <caldate>20050101</caldate>
            </sngdate>
          </timeinfo>
          <srccurr>publication date</srccurr>
        </srctime>
        <srccitea>40 CFR</srccitea>
        <srccontr>The spatial boundaries of each nonattainment and maintenance area are defined in 40 Code of Federal Regulations Part 81.</srccontr>
      </srcinfo>
      <srcinfo>
        <srccite>
          <citeinfo>
            <origin>U.S. Environmental Protection Agency</origin>
            <pubdate>20050101</pubdate>
            <title>Green Book</title>
            <onlink>http://www.epa.gov/oar/oaqps/greenbk/</onlink>
          </citeinfo>
        </srccite>
        <typesrc>None</typesrc>
        <srctime>
          <timeinfo>
            <sngdate>
              <caldate>20060101</caldate>
            </sngdate>
          </timeinfo>
          <srccurr>publication date</srccurr>
        </srctime>
        <srccitea>Green Book</srccitea>
        <srccontr>The United States Environmental Protection Agency's (EPA) "Green Book" defines Criteria Pollutants. EPA uses six "criteria pollutants" as indicators of air quality, and has established for each of them a maximum concentration above which adverse effects on human health may occur. These threshold concentrations are called National Ambient Air Quality Standards (NAAQS).</srccontr>
      </srcinfo>
      <procstep>
        <procdesc>Data collected from the Environmental Protection Agency or created using base geographic reference layers and physical descriptions provided by EPA and contained in in 40 Code of Federal Regulations Part 81.</procdesc>
        <procdate>20040101</procdate>
      </procstep>
      <procstep>
        <procdesc>Updated with information from the EPA Green Book.</procdesc>
        <procdate>20050101</procdate>
      </procstep>
      <procstep>
        <procdesc>Spatial data edited and cleaned to more closely match shorelines.</procdesc>
        <procdate>20060101</procdate>
      </procstep>
      <procstep>
        <procdesc>Standard quality control processes performed in preparation for publication.</procdesc>
        <procdate>20060101</procdate>
        <proccont>
          <cntinfo>
            <cntorgp>
              <cntorg>Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)</cntorg>
              <cntper>Geospatial Information Program</cntper>
            </cntorgp>
            <cntvoice>1 202 366 DATA</cntvoice>
            <cntfax>1 202 366 3640</cntfax>
            <cntemail>answers@bts.gov</cntemail>
          </cntinfo>
        </proccont>
      </procstep>
    </lineage>
  </dataqual>
  <spdoinfo>
    <direct>Vector</direct>
    <ptvctinf>
      <sdtsterm>
        <sdtstype>GT-polygon composed of chains</sdtstype>
        <ptvctcnt>77</ptvctcnt>
      </sdtsterm>
    </ptvctinf>
  </spdoinfo>
  <spref>
    <horizsys>
      <geograph>
        <latres>8.983152841195215e-009</latres>
        <longres>8.983152841195215e-009</longres>
        <geogunit>Decimal Degrees</geogunit>
      </geograph>
      <geodetic>
        <horizdn>D WGS 1984</horizdn>
        <ellips>WGS 1984</ellips>
        <semiaxis>6378137.0</semiaxis>
        <denflat>298.257223563</denflat>
      </geodetic>
    </horizsys>
  </spref>
  <eainfo>
    <detailed>
      <enttyp>
        <enttypl>CO_1990NAAQS</enttypl>
        <enttypd>Non-Attainment Areas: Carbon Monoxide</enttypd>
        <enttypds>RITA/BTS</enttypds>
      </enttyp>
      <attr>
        <attrlabl>FID</attrlabl>
        <attrdef>Internal feature number.</attrdef>
        <attrdefs>ESRI</attrdefs>
        <attrdomv>
          <udom>Sequential unique whole numbers that are automatically generated.</udom>
        </attrdomv>
      </attr>
      <attr>
        <attrlabl>Shape</attrlabl>
        <attrdef>Feature geometry.</attrdef>
        <attrdefs>ESRI</attrdefs>
        <attrdomv>
          <udom>Coordinates defining the features.</udom>
        </attrdomv>
      </attr>
      <attr>
        <attrlabl>COMPOSID</attrlabl>
        <attrdef>Composite ID of area. Pollutant name, year of designation, and text name of area</attrdef>
        <attrdefs>EPA</attrdefs>
      </attr>
      <attr>
        <attrlabl>Pollutant</attrlabl>
        <attrdef>Type of pollutant</attrdef>
        <attrdefs>EPA</attrdefs>
        <attrdomv>
          <edom>
            <edomv>CO</edomv>
            <edomvd>Areas of Carbon Monoxide, in 1990</edomvd>
            <edomvds>EPA</edomvds>
          </edom>
        </attrdomv>
      </attr>
      <attr>
        <attrlabl>AREA_NAME</attrlabl>
        <attrdef>Name of the NAA as designated by the EPA</attrdef>
        <attrdefs>EPA</attrdefs>
        <attrdomv>
          <udom>Character Value</udom>
        </attrdomv>
      </attr>
      <attr>
        <attrlabl>State</attrlabl>
        <attrdef>Primary state in which NAA is found</attrdef>
        <attrdefs>EPA</attrdefs>
        <attrdomv>
          <codesetd>
            <codesetn>Official List of U.S. Postal Code Abbreviations</codesetn>
            <codesets>U.S. Postal Service (USPS)</codesets>
          </codesetd>
        </attrdomv>
      </attr>
      <attr>
        <attrlabl>Current_At</attrlabl>
        <attrdef>Current Attainment</attrdef>
        <attrdefs>EPA</attrdefs>
        <attrdomv>
          <edom>
            <edomv>Maintenance</edomv>
            <edomvd>Under supervision</edomvd>
            <edomvds>EPA</edomvds>
          </edom>
        </attrdomv>
      </attr>
      <attr>
        <attrlabl>CLASSIFICA</attrlabl>
        <attrdef>Severity classification as identified by the EPA.</attrdef>
        <attrdefs>EPA</attrdefs>
        <attrdomv>
          <edom>
            <edomv>Moderate &lt;= 12.7 ppm</edomv>
            <edomvd>moderate, less than or equal to 12.7 parts per million</edomvd>
            <edomvds>EPA</edomvds>
          </edom>
          <edom>
            <edomv>Moderate &gt; 12.7 ppm</edomv>
            <edomvd>moderate, greater than 12.7 parts per million</edomvd>
            <edomvds>EPA</edomvds>
          </edom>
          <edom>
            <edomv>Not Classified</edomv>
            <edomvd>not classified</edomvd>
            <edomvds>EPA</edomvds>
          </edom>
          <edom>
            <edomv>Serious</edomv>
            <edomvd>serious</edomvd>
            <edomvds>EPA</edomvds>
          </edom>
        </attrdomv>
      </attr>
      <attr>
        <attrlabl>Redesignat</attrlabl>
        <attrdef>Date of redesignation</attrdef>
        <attrdefs>EPA</attrdefs>
      </attr>
      <attr>
        <attrlabl>VERSION</attrlabl>
      </attr>
    </detailed>
    <overview>
      <eaover>Carbon monoxide (CO) is a colorless, odorless and poisonous gas produced by incomplete burning of carbon in fuels. When CO enters the bloodstream, it reduces the delivery of oxygen to the body's organs and tissues. Health threats are most serious for those who suffer from cardiovascular disease, particularly those with angina or peripheral vascular disease. Exposure to elevated CO levels can cause impairment of visual perception, manual dexterity, learning ability and performance of complex tasks. 

77% of the nationwide CO emissions are from transportation sources. The largest emissions contribution comes from highway motor vehicles. Thus, the focus of CO monitoring has been on traffic oriented sites in urban areas where the main source of CO is motor vehicle exhaust. Other major CO sources are wood-burning stoves, incinerators and industrial sources. 

The National Ambient Air Quality Standard for carbon monoxide is 9 ppm 8-hour nonoverlapping average not to be exceeded more than once per year. The rounding convention in the standard specifies that values of 9.5 ppm, or greater, are counted as exceeding the level of the standard. An area meets the carbon monoxide NAAQS if no more than one 8-hour value per year exceeds the threshold. (High values that occur within 8 hours of the first one are exempted. This is known as using "nonoverlapping averages.") To be in attainment, an area must meet the NAAQS for two consecutive years and carry out air quality monitoring during the entire time. Air quality carbon monoxide value is estimated using EPA guidance for calculating design values (Laxton Memorandum, June 18, 1990).

Title 40, Part 50 of the Code of the Federal Regulations lists the ambient air quality standard for carbon monoxide. 

Sections 107(d)(4)(A) and 186 of the Clean Air Act lists the requirements for designations and classifications of carbon monoxide areas.</eaover>
    </overview>
  </eainfo>
  <distinfo>
    <distrib>
      <cntinfo>
        <cntorgp>
          <cntorg>Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)</cntorg>
          <cntper>Office of Geospatial Information Systems</cntper>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical</addrtype>
          <address>1200 New Jersey Ave., SE</address>
          <city>Washington</city>
          <state>DC</state>
          <postal>20590</postal>
          <country>US</country>
        </cntaddr>
        <cntvoice>1 202 366 DATA</cntvoice>
        <cntemail>answers@bts.gov</cntemail>
      </cntinfo>
    </distrib>
    <resdesc>National Transportation Atlas Database (NTAD) 2013</resdesc>
    <distliab>None</distliab>
    <stdorder>
      <digform>
        <digtinfo>
          <formname>ESRI Shapefile</formname>
          <formvern>2013</formvern>
          <filedec>No compression applied. However, if using digital transfer online option, note access instructions.</filedec>
          <transize>5.098</transize>
        </digtinfo>
        <digtopt>
          <onlinopt>
            <computer>
              <networka>
                <networkr>http://www.bts.gov/programs/geographic_information_services/</networkr>
              </networka>
            </computer>
          </onlinopt>
          <offoptn>
            <offmedia>dvd</offmedia>
            <recfmt>ISO 9660</recfmt>
          </offoptn>
        </digtopt>
      </digform>
      <fees>None</fees>
      <ordering>Call (202-366-DATA), or E-mail (answers@bts.gov) RITA/BTS to request the National Transportation Atlas Databases (NTAD) 2013 DVD. The NTAD DVD can be ordered from the online bookstore at www.bts.gov. Individual datasets from the NTAD can also be downloaded from the Office of Geospatial Information Systems website at http://www.bts.gov/programs/geographic_information_services/.</ordering>
    </stdorder>
    <availabl>
      <timeinfo>
        <sngdate>
          <caldate>20110101</caldate>
        </sngdate>
      </timeinfo>
    </availabl>
  </distinfo>
  <metainfo>
    <metd>20130424</metd>
    <metc>
      <cntinfo>
        <cntorgp>
          <cntorg>Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)</cntorg>
          <cntper>Office of Geospatial Information Systems</cntper>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical</addrtype>
          <address>1200 New Jersey Ave., SE</address>
          <city>Washington</city>
          <state>DC</state>
          <postal>20590</postal>
          <country>US</country>
        </cntaddr>
        <cntvoice>1 202 366 DATA</cntvoice>
        <cntemail>answers@bts.gov</cntemail>
      </cntinfo>
    </metc>
    <metstdn>FGDC Content Standard for Digital Geospatial Metadata</metstdn>
    <metstdv>FGDC-STD-001-1998</metstdv>
    <mettc>local time</mettc>
  </metainfo>
</metadata>