The table shows the relative permeability of different materials, where 1 means very low permeability and 10 means very high permeability. Material Particle Size & Texture Relative Permeability coarse basalt large, fractured rock pieces 7 medium sand medium-sized, loose grains 8 fine clay very small, sticky particles 1 thick alluvium mixed gravel, sand, and silt 9 shale thin, flat rock layers 2 Arrange the sites based on the speed with which water would most likely infiltrate the ground in a flat area (from slowest to fastest). Place the slowest at the top of the list.