Explore Air

Particulate Matter Speciation


This webpage provides specifications on particle speciation for a variety of sources. The information reflects National Park Service current thinking for each of the sources. These specifications should be included in all modeling protocols. Further refinements and modifications will be made as new information becomes available. Air quality analyses for Class I areas should include the speciation recommendations found on the web pages available through the drop down list below.

Many of the webpages provide sample Excel XP workbooks to be used as examples for the user's specific sources. Download the Excel workbook and rename the workbook before beginning any calculations. Use a new workbook for each application.

If you have questions, comments, or suggestions, please contact Don Shepherd at the National Park Service, Air Resources Division in Denver at 303-969-2075 or contact us through the Webmaster link at the bottom of the page.

To browse available speciation information by source, select from the drop-down list below or use the Highlights list at the top right.

Select a Source » 

updated on 03/28/2006  I   http://www2.nature.nps.gov/air/permits/ect/index.cfm   I  Email: Webmaster