2.4. A desired goal in clay liner construction is to minimize the permeability so that seepage of waste liquid through the liner is minimal. Figure P2.4a and b show two options of using materials from different borrow pits. If k₁ = 1 x 10-7 cm/s and k₂ = 1 x 10-8 cm/s, t = 3.0 ft, f₁ = t2 = 1.5 ft, which option would you prefer to minimize seepage through the liner? Justify your answer. Waste K₁.4 K₂, t₂ (a) Waste k₁, t (b) Fig. P2.4 k21