“OSHA 29CFR 1910.272 (g)(iv)(2) prohibits employees entering grain storage structure from a level at or above the level of stored grain without a body harness and lifeline. This includes any structure where the entry point is greater than 4 (four) feet above floor level and where the grain is at that level of entry. This restriction does not include entry at or near the ground level entry sites to move grain out of the structure using augers, shovels and brooms. The angle of repose of grain is approximately 30 degrees: which is the steepest angle at which loose material remains stationary without sliding down slope. Once this angle has been reached, grain will no longer flow into the drain port inside the structure. At this point entrants will enter the structure and standing on the floor, will begin to shovel or auger materials to the drain manually. Grains that flow at this point will not exceed waist-deep levels as indicated by OSHA.”