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Title: 2015 Groundwater Monitoring and Inspection Report Gnome-Coach, New Mexico, Site

The Gnome-Coach, New Mexico, Site was the location of a 3-kiloton-yield underground nuclear test in 1961 and a groundwater tracer test in 1963. The U.S. Geological Survey conducted the groundwater tracer test using four dissolved radionuclides-tritium, iodine-131, strontium-90, and cesium-137-as tracers. Site reclamation and remediation began after the underground testing and was conducted in several phases at the site. The New Mexico Environment Department (NMED) issued a Conditional Certificate of Completion in September 2014, which documents that surface remediation activities have been successfully completed in accordance with the Voluntary Remediation Program. Subsurface activities have included annual sampling and monitoring of wells at and near the site since 1972. These annual monitoring activities were enhanced in 2008 to include monitoring hydraulic head and collecting samples from the onsite wells USGS-4, USGS-8, and LRL-7 using the low-flow sampling method. In 2010, the annual monitoring was focused to the monitoring wells within the site boundary. A site inspection and annual sampling were conducted on January 27-28, 2015. A second site visit was conducted on April21, 2015, to install warning/notification signs to fulfill a requirement of the Conditional Certificate of Completion that was issued by the NMED for the surface.
  1. Navarro Research and Engineering, Oak Ridge, TN (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Technical Report
Research Org:
U.S. Department of Energy, Washington, DC (United States)
Sponsoring Org:
USDOE Energy Information Administration (EIA), Office of Energy Statistics (EI-20); USDOE Office of Legacy Management (LM), Office of Site Operations (LM-20)
Country of Publication:
United States
54 ENVIRONMENTAL SCIENCES Gnome-Coach; NM Site; Analytical sampling results