For PAHs and their derivatives, the original log Koc-log Kow correlation established by Karickhoff et al. (1979) with sediments is converted to that for soils using the relation of Koc (sediment) ≅ 2 Koc (soil) (Kile et al., 1995) along with Koc=1.85Kom (Chiou, 2002) to give: