The U.S. Department of Energy (DOE) announces the availability of an Explanation of Significant Differences (ESD) for review. The ESD describes change in the location of the treatment of the Mound Site Plume from the Mound Site Plume Treatment System to the East Trenches Site Plume Treatment System air stripper. The ESD provides website references to the site history and the selected remedy and information on the proposed adjustment to the remedy for changing the treatment location of the groundwater intercepted from the Mound Site Plume. The ESD is documented as Rocky Flats Legacy Management Agreement (RFLMA) Contact Record 2016-02 Mound Site Plume Treatment System reconfiguration project Soil Disturbance Review Report and Explanation of Significant Differences. Contact Record 2016-02 is available at http://www.lm.doe.gov/Rocky_Flats/ContactRecords.aspx. Additional information on the Rocky Flats Site is available on the Rocky Flats DOE Office of Legacy Management website at http://www.lm.doe.gov/Rocky_Flats/Sites.aspx.