A significant volume of nonaqueous phase liquid (NAPL) contaminants can become trapped as a discontinuous residual phase below the water table as a result of seasonal water table fluctuation, flooding, lens migration, or the primary pumping stage of remediation. The objective of this research was to develop a correlation model that could predict residual NAPL saturation as a function of common soil characteristics and fluid properties. Over 100 column experiments were conducted across a range of nine different soil gradations. The curves produced by these tests, along with measured soil and fluid properties, were used to generate the correlation models that predict residual NAPL saturation (S_rn).