OD-PABA (2-ethylhexyl-4-(dimethylamino)benzoate) is an organic ultraviolet filter chemical that is used in many sun protection products. It has been proven to have cytotoxic effects and readily degrades into harmful photoproducts. Given its use in sunscreen products, it enters the aquatic environment via recreational use and wastewater treatment plant effluent, thus endangering aquatic biodiversity. Both planktonic and benthic organisms can be negatively affected by OD-PABA, so an understanding of sediment sorption equilibrium can properly direct mitigation efforts. Sorption processes are not easily quantified in a laboratory setting due to the experimental constraints of batch sorption experiments (i.e., the necessity of a container) - especially with strongly hydrophobic compounds such as OD-PABA. To mitigate the adsorption of OD-PABA to the container (as opposed to the sediment), a precise concentration of methanol was used to avoid solvophobic effects. This sorption method was used to determine the sorption capacities for OD-PABA of five sediment samples, each with unique geochemical characteristics. Sorption isotherms were quantified using the Redlich-Peterson model, and the sediment-water distribution (Kd), organic carbon-normalized (Koc), and fraction organic cosolvent-normalized (Kfc) sorption equilibrium coefficients were determined. The developed method was also used to investigate the sorption of para-amino benzoic acid (PABA), a water-soluble analog of OD-PABA, in order to validate the solvophobic theory approach.