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 This website is no longer updated and links to external websites and some internal pages may not work.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 »

Air Emissions Factors and Quantification

AP 42 Section 11.19.2 Crushed Stone Processing and Pulverized Mineral Processing - Response to Comments

The information in this document has been funded by the National Stone, Sand and Gravel Association (NSSGA) for the U.S. Environmental Protection Agency (EPA). It has been reviewed by the EPA Office of Air Quality Planning and Standards and has been approved for publication.

Response to Comments, February 23, 2004 draft (PDF) (21 pp, 112 K)

AP 42 Emissions Factors by Chapter