1. Sand accumulation on floor simulating 8-hour shift in Iraqi desert 2. Sand accumulation floor simulating 8-hour shift in Iraqi desert and then swept into channels of floor 3. Disabled flushing manifold 4. Spill of 5-gallons of viscous hydraulic fluid (ISO 32) 5. Blockage of holes using a 5-foot by 2-foot (1.5-meter by 0.6-meter) Viton® mat