OBJECTIVES 1. Measure grain commingling levels during elevator handling for use in developing procedures, decision support systems, and instrumentation to facilitate value-added and identity-preserved grain segregation operations. 2. Develop new stored grain packing factors with known accuracy as needed for common grains in trade over a range of field conditions. 3. Develop improved aeration, monitoring, and sanitation systems and best management practices for quality maintenance and insect control in stored grain. 4. Measure dust emission, particle-size distribution, and air entrainment during grain unloading to facilitate reducing dust emissions from grain handling operations and equipment.