Abstract: Methods and devices for transporting, cleaning or storing materials such as alternative fuels like shelled corn or wood pellets. Material is transferred to a first container through a transfer conduit as a result of negative pressure created by a vacuum. Small, lighter impurities such as corn dust, red-eyes, bees-wings and the like are removed from the material by the vacuum as the material enters the first container. The material then passes from the first container to a second container. The material is then transferred through the second container by way of a paddlewheel which is driven by a motor. As the material exits the second container it passes through a screen which prevents large, heavier impurities such as stones, husks and the like from passing. The cleaned material then enters either a storage container or a holding compartment where it can be stored or consumed as fuel.