Data for the geochemical investigation of UMTRAP designated site at Mexican Hat, Utah

This report contains the data and methods of a geochemical investigation of the former uranium mill and tailings site at Mexican Hat, Utah. This is part of the series of site specific geochemical investigations performed on the inactive uranium mill tailings included in the UMTRA Project. The objectives are to provide the appropriate data to characterize the geochemistry, to determine the contaminant distribution resulting from the former milling activities and tailings, and to infer chemical pathways and transport mechanisms from the contaminant distribution. The results from the interpretation of the data will be used to model contaminant migration and to develop criteria for long-term containment media such as a cover system which is impermeable to contaminant migration. Data are from a one-time sampling of waters and solid material from the background, the area adjacent to the site, and the site. The solid samples are water extracted to remove easily soluble salts and acid extracted to remove carbonates and hydroxides. The water extracts and solid samples were analyzed for the major and trace elements.