Auditing and Assessing Air Quality in Concentrated Feeding Operations1231Contribution from the USDA-ARS Conservation and Production Res. Laboratory, Bushland, TX 79012, in cooperation with the Texas Agricultural Exp. St., Amarillo, and West Texas A&M Univ., Canyon.2Mention of trade names or commercial products in this article is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the USDA.3Presented at the Annual ARPAS Symposium Current and Future On-Farm Auditing and Assessment, San Antonio, TX, July, 2007.