Granulometric and clay mineral analyses were performed on sediment samples from wells in Escambia County, Florida. This study is of particular interest because the study area is a hazardous waste site designated by the u.s. Environmental Protection Agency. The area under investigation is 1 km north-south and 0.5 km east-west. Although the area is small, a very detailed sedimentologic study wag warranted due to the high levels of contamination in the subsurface. Settling tube analysis wag performed on 168 sand samples from 10 wells and two vibrocores. Twenty of these samples were sieved in order to calibrate the settling tube data. Granulometric results were determined and plotted on bivariate graphs. These results were compared to published bivariate environmental interpretation graphs {environments of deposition). The granulometric results have also been compared to natural gamma and neutron well logs for selected wells. Finally, 20 clay samples were analyzed using an x-ray diffractometer to determine the relative abundances of the clay minerals. Based upon comparison with published reports, the clay mineral assemblages appear to be typical Cenozoic fluvial and near shore marine clays of the Gulf coast region. Correlation of granulometric results among wells was not possible. Furthermore, comparison of granulometric analysis with well logs was not successful due to the large sampling interval down core. Correlation among clay layers using natural gamma and neutron logs has yielded limited results particularly parallel to the modern shoreline. All attempts at correlation have demonstrated the heterogeneity of the sand-and-gravel aquifer in this small-scale study. The environmental interpretation results were more conclusive, indicating that the depositional environment for these sediments was a river mouth setting in an estuary, delta, lagoon, or some type of closed basin. All available evidence indicates a distributary mouth bar environment as the most probable depositional setting.