an environmental engineer wants to examine the permeability of different soils to determine the best natural containment system to protect groundwater from pollutants. the engineer tests four different soil samples, places them into a wet column, and pours 50ml of water over each sample. the engineer records the total amount of water that moves through the column as well as the total amount of time for the water to fully percolate through the soil. the data from the study are shown below.