A laboratory-scale apparatus and associated chemodynamic transport model was tested with samples of field-contaminated sediment containing high concentrations of low volatility polyaromatic (PAHs) and high volatility petroleum hydrocarbons (BETXs). The experiments were designed to measure the flux to air while attempting a realistic simulation of the aquatic conditions resulting from the extraction, transport, and treatment of the dredged material (DM) derived from the bed-sediment source material. The test apparatus provided for horizontal air flow over a chamber containing particle-in-water slurries that could also be artificially stirred. This batch desorption design was adapted to mimic both the wind-water enhanced and the dredging operations mechanical turbulence effects on the evaporation process. The air was sampled to quantify the flux of 12 chemicals in experiments using sediment-to-water ratios of 1 and 8%. Naphthalene was the most abundant constituent in the sediment and gave the highest fluxes...