The RI included sampling of surface and subsurface soils, slag piles, sediments, surface water, groundwater, and air. Also conducted as part of the RI were a hydrogeologic study, a radiation survey and investigation, and an ecological survey and sampling. Wastes are stored at the Tex-Tin facility in slag piles, surface impoundments, drums, tanks, a landfill, and an injection well. The piles of slag contain high concentrations of inorganics, some of which are above background levels. The drums, containing mostly catalyst and blowdown ash, are located in two staging areas and are in various stages of decay.
Soil contamination is of concern due to observed contamination within residential yards.
Chemical analyses of the surface soil samples collected from 51 residential yards indicate metal contamination at levels greater than three times background levels. Metals detected significantly above background include arsenic, cadmium, copper, lead, mercury, and zinc. The description may change as additional information is gathered on the sources and extent of contamination.