2. A column settling test for a flocculant suspension for a basin that is 3.0 m deep produced the following results. Design a sedimentation basin that will remove 65% of the suspended solids. Time (min.) 20 30 40 50 60 70 80 Percent suspended solids removed at indicated depth (m) 0.5 1.0 1.5 2.0 2.5 61 71 63 55 81 72 63 61 57 90 81 73 67 63 90 74 68 86 80 75 86 81 80 2. A column settling test for a flocculant suspension for a basin that is 3.0 m deep produced the following results. Design a sedimentation basin that will remove 65% of the suspended solids. Time (min.) 20 30 40 50 60 70 80 Percent suspended solids removed at indicated depth (m) 0.5 1.0 1.5 2.0 2.5 61 71 63 55 81 72 63 61 57 90 81 73 67 63 90 74 68 86 80 75 86 81 80