FIG. 15. Nonaqueous-phase liquid (NAPL) saturation with time at four points: in 1.18-mm sand at (x,z) = (50.7,29.6), purple squares; in 0.6-mm sand at (53.1,18.5), blue triangles, and at (18.0,35.5), blue circles; and in a mixture of 0.6- and 0.3-mm sand at (32.9,33.6), black x's.