Unloading System PM 2.5 , PM 10 and Total PM Emission Factors for Cotton Gin A using Method 201a with a PM 2.5 Cyclone Part of the National Characterization of Cotton Gin Particulate Matter Emissions Project Report ID: 01-PM2.5-GA-201a September 2014 Submitted to: U.S. Environmental Protection Agency Submitted by: Dr. Michael Buser (contact) Dept. of Biosystems and Agricultural Engineering Oklahoma State University 113 Agricultural Hall Stillwater, OK 74078 (405) 744-5288 buser@okstate.edu Mr. Thomas Moore Dept. of Biosystems and Agricultural Engineering Oklahoma State University 117 Agricultural Hall Stillwater, OK 74078 (903) 477-2458 thomas.moore11@okstate.edu Dr. Derek Whitelock Southwestern Cotton Ginning Research Laboratory USDA Agricultural Research Service 300 E College Dr. Mesilla Park, NM 88047 (575) 526-6381 Derek.Whitelock@ars.usda.gov