2006 Annual Report 4d.Progress report. This report serves to document research conducted under a specific cooperative agreement between ARS and Kansas State University. Additional details of research can be found in the report for the parent CRIS 5430-43440-005-00D, Improved Handling and Storage Systems for Grain Quality Maintenance and Measurement. The objective of this cooperative research is to improve IP grain handling and reduce grain dust emissions by measuring existing grain commingling and dust emissions and developing procedures, decision support systems, and instrumentation to facilitate improved handling operations. In tests of repeated handling of feed pellets in the USDA-ARS, Grain Marketing and Production Research Center research elevator at Manhattan, Kansas, the average mass of dust removed per transfer was 0.069% of the mass of pellets, which was not significantly different than previous tests with shelled corn for eight transfers. Overall, 50% of dust collected was fine dust (less than or equal to 125 microns), which was a smaller percentage than that collected with shelled corn, indicating that these pellets produced less dust emissions during handling than shelled corn.