FIG. 7. Nonaqueous-phase liquid (NAPL) saturation with time at five points: in 2.36-mm sand at (x,z) = (41.9,27.2), red empty circles, and at (50.2,14.7), red filled circles; in 1.18-mm sand at (41.7,24.2), purple squares; in 0.6-mm sand at (52.8, 8.5), blue triangles; in a mixture of 0.6- and 0.3-mm sand at (43.8,8.0), black x's.