Tetrachloroethylene, trichloroethylene, and 1,1,2-Trichloro-1,2,2-trifluoroethane concentrations in tree-core, groundwater, and soil samples at the Vienna Wells Site: Maries County, Missouri, 2011-2016

This U.S. Geological Survey (USGS) Data Release contains tree-core, groundwater, and soil data collected at the Vienna Wells Superfund site in Vienna, Missouri by the U.S. Geological Survey between 2011 and 2016. Concentrations of tetrachloroethylene (PCE), trichloroethylene (TCE), and 1,1,2-Trichloro-1,2,2-trifluoroethane (CFC-113) are reported for each location or sample in each medium. Tree-core sampling was conducted over seven days during six major phases occurring during September 2011, May 2013, August 2013, July 2014, May 2015, and October 2015. A total of 470 tree-core samples were collected and analyzed using established methods. A total of 56 groundwater samples were collected from monitoring wells on five separate occasions between July 2013 and April 2016. Over 1,000 soil samples were collected by the USGS and the EPA across the site from 366 boreholes using a truck-mounted Geoprobe (Geoprobe Systems, Salina, Kansas) drill rig. Sample intervals are reported for groundwater and soil samples, and tree diameters and tree species are reported for tree-core samples. Concentrations of constituents in groundwater or tree core samples are the averages of all samples collected from each individual well or tree.